CATL Patente

Provided are a battery apparatus (100) and an electric device (200). The battery apparatus (100) includes: a plurality of battery sets (10), where the battery sets (10) are sequentially arranged along a first direction, the battery sets (10) include a wrapping shell (11) and at least one pouch battery cell (12), the pouch battery cell (12) is disposed inside the wrapping shell (11), and among the plurality of battery sets (10), a heat insulating member (20) is provided between at least two adjacent battery sets (10).

A battery apparatus (100), an energy storage apparatus (1), an energy storage system (1000), an electric apparatus, and a charging network (2000) are disclosed. The battery apparatus (100) includes an energy unit (70). The energy unit (70) includes a housing (71) and a pouch battery cell (20), where the pouch battery cell (20) is located in the housing (71), and the pouch battery cell (20) includes a pouch housing (21), an electrode assembly, and an electrode lead-out portion (22); the electrode assembly is sealed in the pouch housing (21); the electrode lead-out portion (22) is at least partially located in the pouch housing (21) to be connected to the electrode assembly; and the pouch housing (21) is provided with a sealing portion (211) at an end portion in a first direction, and the electrode lead-out portion (22) is at least partially exposed from the sealing portion (211). The battery apparatus (100) further includes a liquid collection structure (30), where the liquid collection structure (30) is correspondingly disposed at an end portion of the pouch battery cell (20) in the energy unit (70) in the first direction, and the liquid collection structure (30) is located below the sealing portion (211).

Disclosed are a battery apparatus (100) and an electric device (200). A U-shaped enclosing shell (21) is adhesively connected to a case (10) through an adhesive layer (12), and busbar supports (23) are disposed on the U-shaped enclosing shell (21) and are each connected to the U-shaped enclosing shell (21) through a connecting part (231). The U-shaped enclosing shell (21) is provided with a pressure relief part (2111), a shear strength of the connecting part (231) is greater than a first preset value, where the first preset value is greater than or equal to 0.1 Mpa, and an adhesive strength of the adhesive layer (12) is greater than a second preset value, where the second preset value is greater than or equal to 1 Mpa.

A battery cell (100), a battery apparatus (200), and an electric device (300) are provided. The battery cell (100) includes a flexible housing (10) and an electrode assembly (20). The electrode assembly (20) is disposed in the flexible housing (10), where the flexible housing (10) has a side surface (11) opposite a large surface of the electrode assembly (20), and a circumferential surface (12) avoiding the large surface, the circumferential surface (12) and the side surface (11) are connected along circumference of the electrode assembly (20), and at least the circumferential surface (12) is provided with a pressure relief region (121).

Disclosed herein is a battery device (100), including a battery cell assembly (20) and a sampling assembly (80). The battery cell assembly (20) includes a plurality of battery cells (30) sequentially connected in series. The sampling assembly (30) includes a plurality of sampling parts, a plurality of connection wire harnesses (70), and an output port (921). Each sampling part is electrically connected to at least one connection wire harness (70), a plurality of the connection wire harnesses (70) are all connected to the output port (921). The plurality of sampling parts include a first sampling part (81) and a second sampling part (82). The first sampling part (81) and the second sampling part (30) are provided with a sampling point that can be electrically connected to the series path of the battery cells (30). The number of the first sampling parts (81) is two, and the two first sampling parts (81) are separately and electrically connected to the battery cell (30) at the front and the battery cell (30) at the rear of a plurality of the battery cells (30) sequentially connected in series. In the series path of a plurality of the battery cells (30), the number of the battery cells (30) between the sampling points of at least two adjacent second sampling parts (82) is greater than or equal to two.

The present application relates to the field of battery technologies, and in particular, to a battery cell, a battery apparatus, an energy storage apparatus, an energy storage system, and a power consuming apparatus. The present application provides a battery cell, including an electrode assembly. The electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separator. The negative electrode sheet includes a negative electrode current collector and a negative electrode material layer disposed on at least one side of the negative electrode current collector. The negative electrode material layer includes a negative electrode active material. The negative electrode active material includes amorphous carbon-coated graphite. The amorphous carbon-coated graphite includes a graphite core and an amorphous carbon coating layer on a surface of the graphite core, where an interplanar spacing of (002) crystal planes of the amorphous carbon is D1, an interplanar spacing of (002) crystal planes of the graphite core is D2, and 1.0 < D1/D2 ≤ 1.1. The positive electrode sheet includes a positive electrode current collector and a positive electrode material layer disposed on at least one side of the positive electrode current collector. The positive electrode material layer includes a positive electrode active material. The positive electrode active material includes a carbon-coated lithium iron phosphate material. In a Raman spectrum of the carbon-coated lithium iron phosphate material, Id/Ig ≤ 1.5.

Provided is a battery apparatus including a plurality of pouch battery cells (10) sequentially stacked and electrically connected and a wrapping shell (20) wrapped outside the plurality of pouch battery cells (10) and configured to restrain the plurality of pouch battery cells (10) at least from three directions, a strength of the wrapping shell (20) being higher than a strength of a flexible shell of the pouch battery cell (10), where a thickness of a plate of the wrapping shell (20) for restraining the plurality of pouch battery cells (10) is less than or equal to 5.2 mm and greater than or equal to 0.2 mm.

A battery cell assembly (20), a battery apparatus (100), and an electric apparatus (1000). The battery cell assembly (20) includes: a plurality of pouch battery cells (30) sequentially electrically connected. The pouch battery cell (30) includes a housing (31), an electrode assembly (32), and electrode leads (33). The electrode assembly (32) is disposed within the housing (31), the electrode leads (33) are electrically connected to the electrode assembly (32), and at least a portion of the electrode lead (33) is exposed outside the housing (31). The electrode leads (33) of two adjacent pouch battery cells (30) are directly connected.

A battery apparatus (100) and an electric device are provided. The battery apparatus (100) includes a plurality of pouch cells (10) and a heat dissipation member (20). The plurality of pouch cells (10) are arranged along a first direction, and the heat dissipation member (20) is disposed between two adjacent pouch cells (10).

Disclosed are a battery apparatus and an electric device. The battery apparatus includes a case and a battery module, and the case has an accommodating cavity and a discharge cavity. The discharge cavity is provided around an outer peripheral side of the accommodating cavity, and the discharge cavity is in communication with the accommodating cavity via a communication hole. The battery module is disposed within the accommodating cavity, and includes a housing and a plurality of pouch battery cells accommodated in the housing. The housing has a weak part configured to release internal pressure of the pouch battery cells.

A battery apparatus, an electric apparatus, and a method for processing a battery apparatus are provided, and pertain to the field of battery technologies. The battery apparatus includes multiple battery cell groups, where the multiple battery cell groups are stacked in a first direction, and each battery cell group includes at least one pouch cell; and each of the battery cell groups located between two ends in the first direction has one terminal in a second direction electrically connected to the battery cell group upstream in the first direction, and the other terminal in the second direction electrically connected to the battery cell group downstream in the first direction; where a flexible bent conductive structure is formed at a connection position of the two interconnected battery cell groups, and the first direction and the second direction are arranged at an angle.

Disclosed are a battery apparatus (100) and an electric apparatus. The battery apparatus includes a case (10), a pouch battery cell assembly (20), and an electrical member (60), where the pouch battery cell assembly (20) includes a plurality of pouch battery cells (30) arranged along a first direction, each pouch battery cell (30) is bonded to the case (10) and includes a packaging bag (31) and electrode leads (33), and the electrode leads (33) are respectively disposed at end parts of the packaging bag (31) along a second direction; all the electrode leads (33) of the plurality of pouch battery cells (30) of the pouch battery cell assembly (20) located at the same side are sequentially arranged along the first direction, and along a third direction, an accommodating gap (201) is formed between a plurality of electrode leads (33) and an end part of the pouch battery cell assembly (20); the electrical member (60) is disposed in the accommodating gap (201) and electrically connected to the electrode leads (33); every two of the first direction, the second direction, and the third direction are arranged at an included angle to each other.

A battery device (100), an energy storage device (1), an energy storage system, an electric device, and a charging network are disclosed. A parallel unit (20) of the battery device (100) includes a plurality of pouch battery cells (21) connected in parallel, a parallel circuit is provided between at least two pouch battery cells (21), one thermally conductive housing (10) correspondingly accommodates the plurality of pouch battery cells (21) in one parallel unit (20), a series unit (30) includes the pouch battery cells (21) connected in series to form the series circuit and separately located in a plurality of parallel units (20), and a current limiter (40) is provided in any of the parallel circuits and is located outside the series circuit to limit the current in the corresponding parallel circuit (20).

A battery apparatus and an electric apparatus are provided and pertain to the field of battery technologies. The battery apparatus includes a cell array and a box; where the cell array is adhesively disposed within the box, and the cell array includes a plurality of pouch cells stacked along a thickness direction; and a reinforcing partition is provided between large surfaces of at least two adjacent pouch cells in the cell array, the reinforcing partition is connected to the box, stiffness of the reinforcing partition is greater than stiffness of a pouch shell of the pouch cell, and the reinforcing partition exchanges heat with the pouch cells.

This application discloses an energy storage practical training teaching aid. The energy storage practical training teaching aid includes an energy storage device, a control device, and a test panel; where the energy storage device includes a plurality of battery packs, each battery pack including a plurality of simulated battery cells connected in series; the test panel includes a measurement terminal unit, where the measurement terminal unit and the control device are both electrically connected to each simulated battery cell, and the measurement terminal unit is connected in parallel with the control device; the measurement terminal unit is configured to connect to an external measurement device to collect electrical parameters between two target simulated battery cells connected to the external measurement device; and the control device is configured to control one or more target simulated battery cells in the energy storage device to output a target required voltage in a simulated manner. The control device is used to perform voltage simulation on the simulated battery cells in the energy storage device, thereby simulating the voltage output of physical battery cells. In this way, the maintenance cost of the energy storage practical training teaching aid is reduced and the safety and service life of the energy storage practical training teaching aid are improved.

A battery trigger device belonging to the field of battery technology is provided. The battery trigger device includes: an input device and a message generation device; the message generation device includes a wireless communication module and a control module; the wireless communication module is wirelessly connected to the input device; the wireless communication module is configured to acquire target data sent by the input device; the control module is connected to the wireless communication module; the control module is provided with a wired communication interface for connecting to a management device of a target battery apparatus; the control module is configured to generate a target signal based on the target data and output the target signal to the management device; and the target signal is used to trigger the target battery apparatus to output electrical energy.

The present application discloses a battery voltage simulation circuit, a battery voltage simulation system, and a power battery training apparatus, including: an isolation connection unit, a control unit, and a conversion output unit; an input end of the isolation connection unit is configured to be electrically connected to an external input device, an output end of the isolation connection unit is electrically connected to an input end of the control unit, an output end of the control unit is electrically connected to an input end of the conversion output unit, and an output end of the conversion output unit is configured to be electrically connected to a simulated battery cell; the isolation connection unit electrically isolates the control unit from the external input device and receives a required voltage signal transmitted by the external input device; the control unit is configured to respond to the required voltage signal by outputting a pulse modulation signal with a target duty cycle to the conversion output unit, where pulse modulation signals corresponding to different required voltage signals have different duty cycles; the conversion output unit converts the pulse modulation signal with the target duty cycle into a corresponding voltage simulation signal, enabling the simulated battery cell to simulate the output of the voltage.

Provided in the present application is a modified high-nickel ternary positive electrode material, containing a core, an inner coating layer and an outer coating layer. The core contains a high-nickel ternary positive electrode material matrix, which is doped with M1, M2 and W, wherein M1 is one of Mo, Zr, Ti, Sb, Nb and Te; and M2 is one of Mg, Al, Ca, Zn and Sr. The chemical formula of the high-nickel ternary positive electrode material matrix doped with M1, M2 and W is Li<1+a>[Ni<x>Co<y>Mn<z>M1<b>M2<c>W<d>]O<2>, wherein 0.65 ≤ x < 1; 0 ≤ y < 0.3; 0 ≤ z < 0.3; 0 < a < 0.2; 0< b < 0.1; 0 < c < 0.1; 0 < d < 0.1; x + y + z + b + c + d = 1; and optionally, 0.8 ≤ x < 1. The surface layer of the core is further doped with Co. The inner coating layer is a Co-containing compound, and the outer coating layer is an Al-containing compound and a B-containing compound. The present application also relates to a method for preparing a modified high-nickel ternary positive electrode material, and a secondary battery, a battery module, a battery pack and a power-consuming apparatus.

This application provides an electrolyte for lithium-ion secondary battery and a battery. The electrolyte includes a solvent, an additive composition, and a lithium salt. The additive composition includes a compound of formula I and at least one of compounds of formula II and formula III. The resulting battery has a high voltage and exhibits good cycling performance and storage performance at high temperature. <img class="EMIRef" id="4c42c2a9-2876-4caa-84d2-2032ba1e3e8f-ia01" /> In the formulas, the symbols are as defined in the specification.

The present application provides a battery apparatus (100) and an electrical apparatus, and relates to the technical field of batteries; the battery apparatus (100) includes at least one battery cell assembly (20), a signal acquisition assembly (40), and a battery monitoring module (50); the battery cell assembly (20) includes a plurality of battery cells (21) arranged along a first direction; the signal acquisition assembly (40) is configured to acquire information of the battery cells (21) of the battery cell assembly (20); the signal acquisition assembly (40) includes a wiring harness group (41) and a first connector (42); the first connector (42) is connected to one end of the wiring harness group (41); the battery monitoring module (50) is provided with a second connector (51); and the second connector (51) is in insertion fit with the first connector (42); the space occupied by the communication connection between the signal acquisition assembly (40) and the battery monitoring module (50) is reduced, the risk of sampling failure caused by interference and wear of the first connector (42) and the second connector (51) between a high-voltage box, a busbar component (30), and an inner wall of a box (10) of the battery apparatus (100) is reduced, the use reliability is improved, thereby improving the reliability of the battery apparatus (100); and moreover, the cost of the battery apparatus (100) can be reduced.

This application provides an electrode assembly and a manufacturing method thereof, a battery cell, a battery, and an electric apparatus. The electrode assembly includes a first electrode plate, and separators provided on two sides of the first electrode plate in a thickness direction of the electrode plate and stacked with the first electrode plate; where in an unfolded state of the electrode assembly, the separator has first edge portions each exceeding an end of the first electrode plate in a length direction of the separator, and the separator has second edge portions each exceeding an end of the first electrode plate in a height direction of the separator; and in the thickness direction of the electrode plate, the corresponding first edge portions on two sides of the first electrode plate are at least partly hot-melt connected to form first hot-melted segments, and the corresponding second edge portions on two sides of the first electrode plate are at least partly hot-melt connected to form second hot-melted segments. The technical solution in this application can enhance the electrochemical performance of batteries and improve the safety and reliability of batteries.

An embodiment of the present application provides an electrode assembly, a battery cell, a battery, and an electrode assembly manufacturing device and method, which belong to the technical field of batteries. The electrode assembly includes a negative electrode plate and a positive electrode plate, the negative electrode plate and the positive electrode plate being wound in a winding direction to form a winding structure, the winding structure including a bending area. Both the negative electrode plate and the positive electrode plate include a plurality of bending portions located in the bending area. At least one bending portion in the negative electrode plate is a first bending portion, and an active substance capacity per unit area outside the first bending portion is greater than an active substance capacity per unit area inside the first bending portion; and/or, at least one bending portion in the positive electrode plate is a second bending portion, and an active substance capacity per unit area outside the second bending portion is greater than an active substance capacity per unit area inside the second bending portion. In the electrode assembly of this structure, the active substance arrangement in at least part area of the bending area of the electrode plate is more reasonable with better economic efficiency.

The embodiments of this disclosure provide an electrode assembly and manufacturing method and device, battery cell, battery, electric device, the electrode assembly is used for a battery cell (100) and includes: a first electrode sheet (1) and a second electrode sheet (2) of opposite polarities, wherein the first electrode sheet (1) and the second electrode sheet (2) both include a main body (11) and at least one tab group (12), the first electrode sheet (1) and the second electrode sheet (2) are winded around a winding axis (K) such that their respective main bodies (11) overlap to form a winding body (S), and after the main bodies (11) have been winded a plurality of electrode sheet layers (111) are formed along a radial direction of the winding main body (S); wherein, the tab group (12) includes a plurality of stacked tabs (12') which protrude from the main body (11), and at least two adjacent tabs (12') in the tab group (12) are separated by at least one electrode sheet layer (111) of same polarity in the radial direction.

Provided in the embodiments of the present application are a power management system, an MCU, a BMS and a battery, which can satisfy the power supply requirements of the MCU, and achieve a higher reliability. The power management system comprises: a primary power supply module, which is connected to a power source, and is used for generating a first voltage according to the voltage of the power source, diagnosing the first voltage, and storing a diagnosis result of the first voltage; and a secondary power supply module, which is connected to the primary power supply module and is used for generating a second voltage according to the first voltage, wherein the second voltage is less than the first voltage, and the second voltage is an operating voltage of an MCU; and the MCU, which is connected to the primary power supply module and the secondary power supply module, and is used for reading the diagnosis result of the first voltage from the primary power supply module and determining, according to the diagnosis result of the first voltage, whether to control a BMS to enter a safe state.

Embodiments of this application provide a control method and control apparatus for a thermal management system. The thermal management system includes a liquid coolant system and a refrigerant system, the liquid coolant system including a heat dissipation apparatus and a cold storage apparatus, where the refrigerant system is configured to cool a battery and/or the cold storage apparatus, the heat dissipation apparatus is configured to cool the battery and/or the cold storage apparatus, and the cold storage apparatus is configured to cool the battery. The method includes: obtaining first thermal management parameter information, where the first thermal management parameter information includes parameter information of the battery, and the parameter information of the battery includes temperature information of the battery and/or parameter information reflecting a heating rate of the battery; and determining a thermal management strategy of the thermal management system based on the first thermal management parameter information. The control method and control apparatus for a thermal management system provided in this application can control the operation of the thermal management system in a more rational manner and can perform effective cooling and heat dissipation for a battery, improving performance and service life of the battery.

A charging system for charging a power battery of a vehicle, including: a battery apparatus configured to store energy and charge the power battery by releasing energy; a charging connector configured to connect to the vehicle so as to charge the power battery via the charging connector; and a thermal management system, including a first heat exchange flow path, a second heat exchange flow path, and a first switching mechanism. The first heat exchange flow path includes a first heat exchanger configured to exchange heat with the battery apparatus. The second heat exchange flow path includes a second heat exchanger configured to exchange heat with the charging connector. The second heat exchange flow path is connected to the first heat exchange flow path via the first switching mechanism. In this way, through an operation of switching the first switching mechanism, the second heat exchange flow path and the first heat exchange flow path become communicated with each other via the first switching mechanism or a communication relationship between the second heat exchange flow path and the first heat exchange flow path via the first switching mechanism is disconnected.

The present application discloses a positive electrode active material and a preparation method thereof, a positive electrode plate, a lithium-ion secondary battery and a battery module, a battery pack and an apparatus related thereto. The positive electrode active material includes a lithium nickel cobalt manganese oxide, the molar content of nickel in the lithium nickel cobalt manganese oxide accounts for 60% - 90% of the total molar content of nickel, cobalt and manganese, and the lithium nickel cobalt manganese oxide has a layered crystal structure of a space group R 3m; a transition metal layer of the lithium nickel cobalt manganese oxide includes a doping element, and the local mass concentration of the doping element in particles of the positive electrode active material has a relative deviation of 20% or less; and in a differential scanning calorimetry spectrum of the positive electrode active material in a 78% delithiation state, an initial exothermic temperature of a main exothermic peak is 200°C or more, and an integral area of the main exothermic peak is 100 J/g or less.

This disclosure discloses a storage and charging integrated apparatus, a charging control method, a charging pile, and a charging system. The storage and charging integrated apparatus includes an energy storage module, a direct-current conversion module, and a charging module; where an input terminal of the direct-current conversion module is configured to receive a first charging power input from an external source; a first output terminal of the direct-current conversion module is connected to a first terminal of the charging module, a second output terminal of the direct-current conversion module is connected to a first terminal of the energy storage module, and a second terminal of the charging module is connected to a second terminal of the energy storage module; and the charging module is connected in series with the direct-current conversion module and the energy storage module, and is configured to output or receive electric energy to or from a to-be-charged device. In this way, the storage and charging integrated apparatus can achieve voltage adaptation with various devices to be charged, which expands the scope of application of the storage and charging integrated apparatus and improves the charging efficiency.

The present application discloses a battery apparatus and an electric apparatus. The battery apparatus of the present application comprises a case body, a battery cell assembly, and a heating component. The battery cell assembly is located in an accommodating space, and comprises a plurality of battery cells arranged in a first direction. The first direction intersects a height direction of the case body. The heating component is located in the accommodating space and arranged between the battery cell assembly and a bottom wall of the case body. The heating component comprises a heating member and protective layers. In the height direction of the case body, the protective layers are respectively provided on both sides of the heating member. The protective layers on both sides of the heating member are connected to each other. The protective layers of the heating member play a role of protecting the heating member, and can prevent a metal foreign body from piercing the heating component, so as to reduce the probability of damage to the heating member of the heating component, thereby improving the reliability of the operation of the heating component.

The present application provides a bracket (100), a battery assembly (10), an electric apparatus (1), and a preparation method and device (6) of the battery assembly (10), and relates to the field of batteries. The bracket (100) is configured to be connected to a battery (300) and an electric apparatus (1) body; the battery (300) includes a first connector (310) for outputting electric energy; and the bracket (100) includes a bracket body (110) and a second connector (140). The bracket body (110) is configured to fix the battery (300). The second connector (140) is mounted on the bracket body (110); and a connecting end of the second connector (140) faces towards a gravity direction, so that the first connector (310) can be butted with the second connector (140) along the opposite direction of the gravity direction, thereby realizing electric connection between the first connector (310) and the second connector (140). Such a structure will not damage the first connector (310) and/or the second connector (140) due to the gravity of the battery (300) so as not to affect the use of the battery (300) or the electric apparatus (1). In the process of mounting the battery (300) , the first connector (310) can be butted with the second connector (140) only by pushing the battery (300) to move along the opposite direction of the gravity, which is convenient and fast.

Provided in the present application is a modified high-nickel ternary positive electrode material, containing a core, an inner coating layer and an outer coating layer. The core contains a high-nickel ternary positive electrode material matrix, which is doped with M1, M2 and W, wherein M1 is one of Mo, Zr, Ti, Sb, Nb and Te; and M2 is one of Mg, Al, Ca, Zn and Sr. The chemical formula of the high-nickel ternary positive electrode material matrix doped with M1, M2 and W is Li<1+a>[Ni<x>Co<y>Mn<z>M1<b>M2<c>W<d>]O<2>, wherein 0.65 ≤ x < 1; 0 ≤ y < 0.3; 0 ≤ z < 0.3; 0 < a < 0.2; 0< b < 0.1; 0 < c < 0.1; 0 < d < 0.1; x + y + z + b + c + d = 1; and optionally, 0.8 ≤ x < 1. The surface layer of the core is further doped with Co. The inner coating layer is a Co-containing compound, and the outer coating layer is an Al-containing compound and a B-containing compound. The present application also relates to a method for preparing a modified high-nickel ternary positive electrode material, and a secondary battery, a battery module, a battery pack and a power-consuming apparatus.

This disclosure relates to the field of electrochemistry, and in particular, to a positive electrode material. The positive electrode material of this disclosure includes a substrate, with a formula of the substrate being Li<x>Ni<y>Co<z>M<k>Me<p>O<r>A<m>, where 0.95 ≤ x ≤ 1.05, 0.50 ≤ y ≤ 0.95, 0 ≤ z ≤ 0.2, 0 ≤ k ≤ 0.4, 0 ≤ p ≤ 0.05, 1 ≤ r ≤ 2, 0 ≤ m ≤ 2, m+r ≤ 2; a coating layer is disposed on the substrate, where the coating layer includes a coating element; absorbance of nickel leachate per unit mass of the positive electrode material w ≤ 0.7; the coating layer comprises an inner coating layer, the inner coating layer is located on surfaces of at least some primary particles inside the substrate, and the inner coating layer comprises a coating element, wherein the coating element of the inner coating layer is selected from one or more of Al, Zr, Ba, Zn, Ti, Co, W, Y, Si, Sn, B, and P; and wherein the coating layer comprises an outer coating layer, the outer coating layer is located on a surface of the substrate, and the outer coating layer comprises a coating element, wherein the coating element of the outer coating layer is selected from one or more of Al, Zr, Ba, Zn, Ti, Co, W, Y, Si, Sn, B, and P.

The present application discloses an electrolyte solution, a secondary battery, a battery module, a battery pack and a powered device. The electrolyte solution comprises an organic solvent and an additive, the organic solvent comprises a first organic solvent shown in Formula 1, and the additive comprises a first additive selected from one or more of compounds represented by Formula 2A and Formula 2B. In Formula 1, R<1> and R<2> are each independently one of C1-C3 alkyl and C1-C3 haloalkyl; in Formula 2A, R<21>, R<22>, R<23>, and R<24> are each independently one of single bond and methylene; in Formula 2B, R<31>, R<32>, R<33>, and R<34> are each independently one of a single bond and methylene, and R<4> is one of a single bond, -O-, C1-C3 alkylene, C1-C3 haloalkylene, and C1-C3 oxaalkylene. The secondary battery of the present application has good fast charging performance while ensuring long cycle life and storage life. <img class="EMIRef" id="a7fb7e6d-80ee-4e58-b84d-aa307d6443be-ia01" /> <img class="EMIRef" id="a7fb7e6d-80ee-4e58-b84d-aa307d6443be-ia02" /> <img class="EMIRef" id="a7fb7e6d-80ee-4e58-b84d-aa307d6443be-ia03" />

This application discloses a rotary dehumidification device, and relates to the field of air conditioning technology. The rotary dehumidification device includes a dehumidification passage, a regeneration passage, a dehumidification module, and an indoor air passage, where the dehumidification passage has a fresh air inlet and an exhaust outlet; the regeneration passage has a first air intake position and a moisture exhaust outlet; the dehumidification module includes a rotatably arranged primary dehumidification rotor, where the primary dehumidification rotor has a first moisture absorption zone and a first regeneration zone arranged along a circumferential direction of the primary dehumidification rotor, the first moisture absorption zone is located between the fresh air inlet and the exhaust outlet, and the first regeneration zone is located between the moisture exhaust outlet and the first air intake position; and the indoor air passage is in communication with the first air intake position. The technical solution of this application facilitates regulation of indoor humidity and air pressure.

The present application is applicable to the field of battery technologies, and provides a battery device (100), an energy storage device, and an electric device. The battery device includes: a box body (10); a battery cell (20), accommodated in the box body; and an electric control assembly (30), accommodated in the box body. The electric control assembly includes a bracket (31) and an electric control component. The bracket includes a bracket body (311). A side that is of the bracket body and that faces the battery cell is connected to a protruding structure (312), and a side that is of the bracket body and that is away from the battery cell is provided with the electric control component. The electric control assembly further includes a heat insulation plate (32) disposed on the side that is of the bracket body and that faces the battery cell. The heat insulation plate, the bracket body, and the protruding structure enclose to form a cavity. In the battery device provided in embodiments of the present application, the protruding structure is disposed on the side that is of the bracket body and that faces the battery cell, and the heat insulation plate, the protruding structure, and the bracket body enclose to form the cavity, so that the cavity and the heat insulation plate jointly function to hinder heat transfer and provide a heat insulation effect.

The present application provides a secondary battery and an electric device. The secondary battery comprises a positive electrode sheet, a negative electrode sheet, and an electrolyte solution; the positive electrode sheet comprises a positive electrode current collector and a positive electrode film layer provided on at least one side of the positive electrode current collector and comprising a positive electrode active material; the positive electrode active material comprises an inner core of lithium iron phosphate material and a carbon shell layer at least partially covering the outer surface of the inner core; in the Raman spectrum of the positive electrode active material, a ratio I_d/I_g of a peak intensity I_d of D peak of a Raman shift within a range of 1350±50 cm^-1 to a peak intensity I_g of G peak of a Raman shift within a range of 1580±50 cm^-1 is 0.2-1.5; the negative electrode sheet comprises a negative electrode current collector and a negative electrode film layer provided on at least one side of the negative electrode current collector; and when the state of charge of the secondary battery is 100% or the voltage of the secondary battery is 3.65 V, a heat release amount Q of the negative electrode film layer in the electrolyte solution satisfies: 250 J/g≤Q≤600 J/g.

The present application provides a battery apparatus, an energy storage apparatus, and an electric apparatus. A battery apparatus (200) includes a battery cell (300) and an electronic control assembly (400). The electronic control assembly includes a circuit board (51), a housing (40), and a covering structure (53). The circuit board is provided with a connector receptacle (52). The housing (40) is provided with an accommodating cavity (401), the circuit board (51) is installed in the accommodating cavity (401), and the housing (40) is provided with an opening (402) for the connector receptacle (52) to extend out. The covering structure (53) is disposed on the housing (40) and at least partially covers a gap (403) between the connector receptacle (52) and a side wall of the opening (402). The gap (403) between the connector receptacle (52) and the side wall of the opening (402) is covered, reduced, or occluded by using the covering structure (53), so that the electronic control assembly meets requirements of a required protection level.

This application provides a battery current collector and a preparation method thereof, a secondary battery, a battery module, a battery pack, and an electric apparatus. The battery current collector includes a foam metal layer (1) and a strength enhancement layer (2), where the strength enhancement layer (2) is a sheet-shaped metal layer, and the strength enhancement layer (2) and the foam metal layer (1) are stacked and metallurgically bonded, alleviating a problem of poor mechanical performance of current collectors in the related art. The strength enhancement layer (2) and the foam metal layer (1) are connected by metallurgical bonding, which helps ensure not only structural strength of the strength enhancement layer (2) and the foam metal layer (1), but also good conductivity between the strength enhancement layer (2) and the foam metal layer (1). Further, the manner of metallurgical bonding helps reduce production costs.

Provided in the embodiments of the present application are a battery cell, a battery, and an electric device. The battery cell comprises a housing, an electrode assembly, a first electrode terminal and a cover plate. The housing comprises a cylindrical body and a cover body, which are integrally formed, and one end of the cylindrical body away from the cover body is provided with an opening. The electrode assembly is accommodated inside the housing and comprises a first tab. The first electrode terminal is arranged on the cover body and is used for being electrically connected to the first tab. The cover plate is connected to the cylindrical body and covers the opening. By means of mounting the first electrode terminal on the cover body, the space between the position, where the cylindrical body and the cover plate are connected to each other, and the first electrode terminal can be increased, such that effect on the position, where the cylindrical body and the cover plate are connected to each other, is reduced when the battery cell is subjected to an external impact, the risk of connection failure between the cover plate and the housing is reduced, and electrolyte leakage is reduced, thereby improving the safety.

This application relates to a secondary battery, and a battery module, a battery pack, and an electric apparatus containing the same. The secondary battery includes: an electrolyte having a specific percentage of a low-viscosity solvent, a specific percentage of a high-dielectric-constant solvent, and a negative electrode having a negative electrode active material layer, and the secondary battery satisfies the relational expression: 1×10−4≤B×C×POI×CW≤1×10−3, where B is the percentage of the low-viscosity solvent in total solvent in the electrolyte by mass; C is a percentage of an electrolyte salt in the electrolyte by mass; P is a porosity of the negative electrode active material layer; CW is a coating weight of the negative electrode active material layer, measured in mg/cm²; and OI is an orientation index of the negative electrode active material layer, where OI=C004/C 110, C004 is a peak area of a 004 characteristic diffraction peak in an X-ray diffraction pattern of the negative electrode active material layer, and C110 is a peak area of a 110 characteristic diffraction peak in the X-ray diffraction pattern of the negative electrode active material layer.