CATL Patente

Disclosed in the present application are a hot-pressing roller mechanism, a pressing roller mechanism, an adhesive application device and a battery production system. The hot-pressing roller mechanism comprises a hot-pressing roller and a heating assembly, wherein the heating assembly and the hot-pressing roller are spaced apart from each other; and the heating assembly is configured to perform non-contact heating on the hot-pressing roller. By means of non-contact heating, no structural member is introduced to the surface of the hot-pressing roller, such that the phenomenon of foreign matter being introduced to the surface of an electrode sheet during the process of the hot-pressing roller performing hot pressing on the electrode sheet can be alleviated, thus increasing the adhesive application yield. The hot-pressing roller mechanism is used to perform hot pressing on an electrode sheet to which an adhesive has been applied, and to smooth and compact an adhesive tape on the surface of the electrode sheet, thus enhancing the bonding tightness between the adhesive tape and the electrode sheet, and increasing the adhesive application yield.

Disclosed are an electrolyte, a lithium secondary battery, and an electric device. The electrolyte includes a first solvent, a silane compound containing a carbon-carbon double bond, and a cyclic lithium borate compound. The first solvent includes a cyclic carbonate compound. Based on a total mass of the electrolyte, a mass content W3 of the cyclic carbonate compound, a mass content W1 of the silane compound containing a carbon-carbon double bond, and a mass content W2 of the cyclic lithium borate compound satisfy: 0.001 ≤ (W1+W2)/W3 ≤ 2.67. The silane compound containing a carbon-carbon double bond and the cyclic lithium borate compound are used in combination, which can improve the flexibility and thermal stability of an SEI film, thereby reducing the degree of gas production of the lithium secondary battery during the processes of cycling and storage and improving the storage performance, fast charge performance and cycling performance of the lithium secondary battery.

A battery (100), a battery management system (400), and an electric device (500). The battery (100) comprises: a case (10); a liquid leakage detection member (20), the liquid leakage detection member (20) being arranged in the case (1) to detect liquid in the case (10), and the liquid leakage detection member (20) being adapted to be communicationally connected to a control device (200) so that the control device (200) controls an alarm device (300) to operate; and a liquid drainage member (30), the liquid drainage member (30) being arranged in the case (10), and the liquid drainage member (30) being fixedly arranged on the bottom wall (11) of the case (10).

A battery cell, a battery, and an electric device. The battery cell comprises a casing, a pressure relief structure, and an electrode assembly. The casing is provided with a first wall. The pressure relief structure is disposed on the first wall. The electrode assembly is a wound electrode assembly and is disposed in the casing, and the electrode assembly comprises a flat portion and a first bending portion. Along a first direction, the first bending portion is disposed on the side of the flat portion facing the first wall. A first boundary line is provided between the first bending portion and the flat portion. The distance between the first boundary line and the first wall is L, wherein L ≥ 5 mm. The first direction is perpendicular to the axial direction of the electrode assembly.

This application relates to a solar cell module and a method for preparing the same, a photovoltaic device, an electrical device, and a power generation device. In two adjacent sub-cells, a conductor is connected to a conductive layer of one sub-cell, with at least a portion protruding beyond at least one end of the conductive layer along a second direction. The electrode layer of the other sub-cell can connect with the protruding portion of the conductor outside the sub-cell, achieving series connection between the two sub-cells outside the sub-cells. This eliminates the need for the conventional two scribing operations before electrode layer deposition to achieve series connection, requiring only a cutting operation between sub-cells. Such a design, by providing a conductor protruding at least one end of the conductive layer along the second direction, eliminates the two scribing operations before sub-cell series connection, facilitating a single-cut preparation method, simplifying the preparation process, and improving preparation efficiency. Additionally, eliminating the two scribing operations reduces the likelihood of increased series resistance between sub-cells, thereby enhancing module performance.

A battery case (100), a battery (200), and an electric device (1000). The battery case (100) comprises a first case portion (1), a second case portion (2), a first sealing member (3), and first fastening members (4); the first case portion (1) and the second case portion (2) are sealedly connected to form a sealed cavity (101), the first case portion (1) comprises a first sealing surface (10), the second case portion (2) comprises a second sealing surface (20), and the first sealing surface (10) and the second sealing surface (20) match to each other to form a sealing interface; the first sealing member (3) is arranged at the sealing interface to seal the first sealing surface (10) and the second sealing surface (20); the first fastening members (4) pass through the first sealing surface (10) and the second sealing surface (20) to connect the first sealing surface (10) and the second sealing surface (20) to clamp the first sealing member (3), so that the first sealing surface (10) and the second sealing surface (20) are sealedly connected; the first fastening members (4) are completely located on the outer side of the sealed cavity (101), and in the direction of extension of the sealing interface, the first fastening members (4) are located on the side of the first sealing member (3) away from the sealed cavity (101).

A composite current collector, an electrode sheet, a secondary battery and an electric device, which can improve the cycle performance of the secondary battery. The composite current collector comprises a support layer, and a bonding layer and an electrically conductive layer, which are sequentially stacked on at least one side surface of the support layer, wherein the bonding layer comprises a bonding-layer main body and a protruding portion, the protruding portion protruding in the thickness direction of the bonding layer and being embedded in the electrically conductive layer.

Disclosed in the present application are a battery processing device and a processing method. The battery processing device includes a material conveying assembly, a pairing assembly, and a welding assembly. The material conveying assembly is configured to convey a first electrode assembly and a second electrode assembly, where the first electrode assembly and the second electrode assembly each include an electrode main body and a tab part disposed on the electrode main body. The pairing assembly is configured to pair the first electrode assembly and the second electrode assembly such that the electrode main body of the first electrode assembly and the electrode main body of the second electrode assembly are stacked on each other. The welding assembly is configured to weld the tab part of the paired first electrode assembly and the tab part of the paired second electrode assembly. In this way, the production efficiency of the battery cell can be improved.

A battery cell (21), a battery (100), and an electrical apparatus are provided. The battery cell (21) includes: a shell (211), the shell (211) having a predetermined wall (212), the predetermined wall (212) being provided with a pressure relief portion (213) and a first glue-applied portion (214), and the first glue-applied portion (214) being arranged on two opposite sides of the pressure relief portion (213); an electrode assembly (22), the electrode assembly (22) being provided inside the shell (211); and an electrode terminal (23), the electrode terminal (23) being provided on the shell (211) and being electrically connected to the electrode assembly (22).

Disclosed in the present application are a wrapping apparatus and wrapping method for an electrode assembly. The electrode assembly comprises an electrode main body and a tab portion, wherein the electrode main body has a first direction, a second direction and a third direction, and comprises two main surfaces, two end surfaces and two side surfaces, and the tab portion protrudes from the first one of the two end surfaces. The wrapping apparatus comprises a first wrapping assembly and a first positioning assembly. The first wrapping assembly is configured to position a wrapping film. The wrapping film comprises two main wrapping areas and a connecting area, with an opening being provided in the connecting area. The first positioning assembly is configured to position the electrode assembly and arrange the tab portion to face the connecting area. The first positioning assembly and the first wrapping assembly are configured to move relative to each other, such that the tab portion passes through the opening along with the relative movement of the first positioning assembly and the first wrapping assembly, and the connecting area wraps around the first one of the two end surfaces. In this way, the interference of the tab portion on the wrapping process can be reduced, and the wrapping effect is improved.

Provided are a transfer device and a battery assembly system. The transfer device includes two conveyor belts, at least one clamping fixture group, and an adjustment assembly. The two conveyor belts are disposed in parallel to and spaced apart from each other. Each clamping fixture group includes two clamping fixtures, the two clamping fixtures are disposed on corresponding ones of the two conveyor belts, respectively, and the two clamping fixtures cooperate with each other to clamp an article to be conveyed. The adjustment assembly is configured to adjust a spacing distance between the two clamping fixtures in response to a control signal. In the above manner, the adaptability of the transfer device to batteries of different models can be improved.

This application relates to the field of battery technology, and discloses a secondary battery, an electrical device, a positive active material and a preparation method thereof, and a positive electrode plate. The secondary battery includes a positive electrode plate. The positive electrode plate includes a lithium-containing phosphate positive active particle. The lithium-containing phosphate positive active particle includes a center portion and a surface portion. The surface portion is continuously or discontinuously distributed on a surface of the center portion. A thickness of the surface portion is less than or equal to 10 nm. A lithium content of the center portion is greater than a lithium content of the surface portion. The secondary battery exhibits relatively high cycle performance.

The present application provides a dust removal device and a battery production system. The dust removal device comprises dust removal assemblies and a first driving assembly. Each dust removal assembly comprises a dust removal brush, and the first driving assembly is connected to the dust removal brush and is configured to be capable of driving the dust removal brush to move in a first direction. In this way, the dust removal brush can clean weld spatters while moving, allowing for a large area of removal of weld spatters on hollow poles of battery cell preforms; and furthermore, the dust removal brush can achieve cleaning of strip-shaped weld marks, improving the cleaning effect of the dust removal device.

The present application provides a fixing device and a battery cell production system. The fixing device is used for fixing a battery cell prefabricated part and comprises a first supporting base, a bearing member, a clamping assembly and a driving assembly; the clamping assembly is arranged on the first supporting base; the clamping assembly comprises a first clamping member, a second clamping member, a third clamping member and a fourth clamping member, and the first clamping member and the second clamping member are arranged on two opposite sides of the bearing member in a first direction; the third clamping member and the fourth clamping member are arranged on two opposite sides of the bearing member in a second direction; the driving assembly is configured to be capable of driving the first clamping member and the second clamping member to be far away from or close to each other in the first direction, and driving the third clamping member and the fourth clamping member to be far away from or close to each other in the second direction. In this way, a space for containing the battery cell prefabricated part can be adaptively adjusted in the horizontal direction on the basis of the shape and/or size of the battery cell prefabricated part, and the application range of the fixing device in the present application is widened.

The present application discloses a battery insertion device, a battery assembly method, and a battery assembly system. The insertion device comprises a machine frame, a bearing mechanism, and an insertion mechanism; the bearing mechanism is arranged on the machine frame, and is used for bearing a bottom cover and an electrode assembly supported above the bottom cover; and the insertion mechanism is arranged on the machine frame, and comprises a case fixing mechanism and a tab part guide mechanism, the case fixing mechanism is used for fixing a case, and the tab part guide mechanism and the case fixing mechanism both can get close to or away from the bearing mechanism, wherein the case fixing mechanism is configured to sleeve the case onto the outer side of the electrode assembly by means of an open end when moving close to the bearing mechanism; and the tab part guide mechanism is configured to guide a tab part to penetrate out of an accommodating cavity through a through hole when the case is sleeved on the electrode assembly. According to the present application, by means of the mode, the tab part smoothly extends out of the case, thereby achieving the accurate insertion of the electrode assembly, reducing the battery preparation difficulty, and improving the assembly efficiency and the yield of batteries.

The present application relates to the technical field of batteries. Disclosed in the present application are a battery cell, a battery, and an electric device. The battery cell comprises a shell and a pressure relief notch, wherein the shell comprises a first wall; and the pressure relief notch is arranged in the first wall and comprises an arc section and a first extension section, the arc section having a first end, and the first extension section being connected to the first end and extending from the first end in the direction approaching the central axis of the arc section. In the battery cell according to the embodiments of the present application, the tearing range and tearing direction of a torn part on the shell can be controlled, and partial valve opening can be achieved after thermal runaway of the battery cell and tearing of the pressure relief notch, thereby reducing the probability of tearing over a large area of the shell and reducing the damage to the battery cell caused by uncontrollable cracks.

Provided in the embodiments of the present application are a battery cell, a battery, an electric apparatus, and an energy storage device. The battery cell comprises a casing and an electrode assembly, wherein the casing comprises a casing body and an end cap, the casing body being provided with an opening and comprising a first wall, the first wall comprising a first opening portion and a first body portion, which are distributed in sequence in a first direction, the first direction being parallel to the thickness direction of the end cap, the first body portion being far away from the opening relative to the first opening portion, and the end cap being connected to the first opening portion and sealing the opening; and the electrode assembly is arranged in the casing body and comprises a negative electrode sheet, the negative electrode sheet comprising a negative electrode active material, the negative electrode active material comprising a silicon-based material, and the maximum thickness of the first opening portion being greater than the thickness of the first body portion. On the basis of the technical solution provided in the embodiments of the present application, the reliability of the battery can be improved.

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

A terminal post welding device (500) and a battery assembling system (1), wherein the terminal post welding device (500) comprises: a battery cell fixing assembly (510), a first tab pressing plate unit (520a) and a welding assembly (515), wherein the battery cell fixing assembly (510) is used to support and fix a battery cell (100) arranged in a lying-down state; the first tab pressing plate unit (520a) comprises a first driving assembly (521) and a first tab pressing plate (522), the first tab pressing plate (522) is mounted on the first driving assembly (521), and the first driving assembly (521) is used to drive the first tab pressing plate (522) to move so that the first tab pressing plate (522) presses the tab portion (1030) of the battery cell (100) onto the terminal post (104) of the battery cell (100); the welding assembly (515) is configured to weld the tab portion (1030) and the terminal post (104) that are pressed together.

The present application provides an end cover welding apparatus (30) for a battery cell (100), an assembling method and a battery cell (100), in which, the battery cell (100) includes a case (101), and an end cover (102) which is arranged at one end of the case (101); a joint of the case (101) and the end cover (102) is provided with a first connecting seam and a second connecting seam which are arranged along a circumferential direction of the case (101); the end cover welding apparatus (30) includes a material conveying assembly (310) and a welding assembly (340), in which, the material conveying assembly (310) includes a conveying line (311), a first clamp (312) and a second clamp (313), and the first clamp (312) and the second clamp (313) are arranged at an interval on the same conveying line (311); the first clamp (312) is configured to fix the case (101) and make the first connecting seam visible; the second clamp (313) is configured to fix the case (101) and make the second connecting seam visible; and the welding assembly (340) is arranged along the conveying line (311) and is configured to weld the first connecting seam when the first clamp (312) with the battery cell (100) fixed is conveyed to the welding assembly (340), and is also configured to weld the second connecting seam when the second clamp (313) with the battery cell (100) fixed is conveyed to the welding assembly (340).

Disclosed in the present disclosure are a driving circuit, a control apparatus, and a driving system. The driving circuit comprises a driving control circuit and a plurality of half-bridge circuits, an output end of the driving control circuit being connected to the plurality of half-bridge circuits, wherein the driving control circuit is used for receiving a communication signal and outputting a plurality of control signals; and the plurality of half-bridge circuits are used for determining the operating states of the plurality of half-bridge circuits on the basis of the plurality of control signals, and providing a driving signal to at least one load circuit on the basis of the operating states of the plurality of half-bridge circuits, wherein the driving signal of each load circuit is provided by at least two of the plurality of half-bridge circuits. In this way, the resource occupancy of a GPIO interface of an MCU can be reduced, thereby improving the control efficiency of the circuit, and the complexity of the circuit is also reduced, thereby improving the anti-interference performance of the circuit.

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

The present application provides a coating device and coating method for an electrode assembly. The electrode assembly includes an electrode main body, the electrode main body has a first direction, a second direction and a third direction that are orthogonal to each other, and includes two main surfaces, two end surfaces, and two side surfaces, and the coating device includes a discharge assembly, a cutting assembly and a first coating assembly. The discharge assembly is used to store and release a material strip, which includes a plurality of coating films connected in sequence along a length direction of the material strip, and each coating film includes two main coating areas spaced apart from each other and a connecting area connected between the two main coating areas. The cutting assembly is used to cut a head end coating film located at a head end of the material strip from the material strip. The first coating assembly is used to coat the first of the two end surfaces with the connecting area of the head end coating film, and to coat each of the two main surfaces with corresponding one of the two main coating areas, so as to form an electrode coating body. Through the above manner, the action complexity of a coating process can be simplified.

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

A tab cutting mechanism and a battery assembling system. The tab cutting mechanism (10) includes a supporting structure (100), a cutting blade assembly (200), an electrode assembly positioning assembly (300), and a first driving assembly (400). The cutting blade assembly (200) includes a first component (210) and a second component (220). The first component (210) is mounted on the supporting structure (100). The electrode assembly positioning assembly (300) is mounted on the supporting structure (100) and is configured to support and position a main body part (22) of an electrode assembly (20). The first component (210) is configured to support a tab portion (21) of the electrode assembly (20). The first driving assembly (400) is mounted on the supporting structure (100), is connected to the second component (220), and is configured to drive the second component (220) to move, to cause the second component (220) to cooperate with the first component (210) to cut the tab portion (21). The tab cutting mechanism solves problems of low alignment degree, misalignment and inconsistent outer dimensions of the tab portion (21), so that the tab portion (21) is more regular, which facilitates subsequent adding of a case (10a) to the electrode assembly (20) to increase a yield rate of a battery (1).

An aluminum alloy material, an aluminum alloy structural component, a preparation method of an aluminum alloy structural component, a battery box, a battery system, an electric apparatus (6), and an application are provided. By mass percentage, the aluminum alloy material includes silicon element, copper element, titanium element, magnesium element, zinc element, manganese element, strontium element, a matrix element Al, and unavoidable impurity elements. The aluminum alloy material includes no Al<2>Cu phase or includes a small amount of Al<2>Cu phase.

Zusammenfassung wird geladen …

A positive electrode composite current collector, a positive electrode sheet, a secondary battery, and an electrical apparatus are provided. The positive electrode composite current collector includes a polymer support layer, a conductive layer, and a high-resistance layer. The conductive layer is disposed on at least one surface of the polymer support layer; and the high-resistance layer is disposed on a surface of the conductive layer facing away from the polymer support layer, where a resistivity of the high-resistance layer is higher than a resistivity of the conductive layer, a total sheet resistance of the high-resistance layer and the conductive layer is R1, and 50 mΩ/□ ≤ R1 ≤ 80 mΩ/□. The positive electrode composite current collector can maintain normal electrode conductivity and keep the DCR of the battery within an appropriate range while enabling the battery to achieve a high nail penetration test pass rate, thereby improving the safety performance of the battery.

A silicon-carbon negative electrode material and a preparation method therefor are provided. the silicon-carbon negative electrode material includes a carbon skeleton having a pore structure and a silicon-based material arranged in the pore structure, where in a region formed by extending from a surface of the silicon-carbon negative electrode material inward by 10 nm away from the surface, a content of high-valence silicon is less than 25% relative to a total amount of low-valence silicon and the high-valence silicon, where the low-valence silicon is silicon with a valence of 0 to 2, and the high-valence silicon is silicon with a valence of 3 to 4. For the silicon-carbon negative electrode material, the specific delithiated capacity and the initial coulombic efficiency of the silicon-carbon negative electrode material can be improved, and the specific discharge capacity and the initial coulombic efficiency of a secondary battery can be enhanced.

The present application provides a smoothing apparatus and a battery assembly system to solve the problem of occurrence of wrinkles on an insulating protective film outside an electrode assembly in the prior art. The smoothing apparatus includes a frame, a drive mechanism, and a pair of rollers that are matched. The rollers are rotatably connected to the frame and used to smooth a member to be smoothed; and the drive mechanism is disposed on the frame and connected to the rollers, and is used to drive the pair of rollers to rotate synchronously. In this way, the drive mechanism drives the pair of rollers to rotate synchronously, so that linear speeds of outer surfaces of the two rollers are the same, thereby solving the problem in the related art that two drive sources are used to respectively drive a pair of rollers but rotational speeds are different.

Zusammenfassung wird geladen …