CATL Patente

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The present application is applicable to the technical field of charging, and provides a charging method and apparatus, a charging management device, and a computer-readable storage medium. The method includes: acquiring a temperature of a battery to be charged; acquiring activation energy data of the battery to be charged; determining a charge cut-off voltage according to the temperature and the activation energy data; and charging the battery to be charged and controlling a maximum charging voltage of the battery to be charged to be less than or equal to the charge cut-off voltage. By using the method, an accuracy of the determined charge cut-off voltage can be improved, thereby enhancing the battery endurance and improving the user experience.

Embodiments of the present application provide a box body (10), a battery (1100), and an electrical device, the box body (10) comprising a main box body (100) and a separator (200). Through holes (101) are formed on the main box body (100), and the separator (200) is arranged in the main box body (100) and blocks the through holes (101). The separator (200) is configured to be melted through when thermal runaway occurs in a battery cell (20). In the embodiments of the present application, the separator (200) can block the through holes (101), such that the inside and outside of the main box body (100) are not in communication, and impurities such as metal particles outside of the main box body (100) cannot enter the main box body (100) from the through holes (101), thereby reducing the probability of insulation failure caused by metal particles outside of the main box body (100) entering the main box body (100). Moreover, the separator (200) can be melted though by heat generated by thermal runaway to promptly discharge heat, reducing the hidden danger of combustion or explosion caused by the occurrence of heat accumulation.

A battery cell (20), a battery (100), and an electric device. The battery cell (20) comprises a casing (210), an electrode assembly (220), electrode terminals (230), and sealing members (240). The casing (210) comprises a first wall (211); through holes (2111) are formed in the first wall (211); the electrode assembly (220) is arranged in the casing (210); the first wall (211) is used for supporting the electrode assembly (220), each electrode terminal (230) is arranged at a corresponding through hole (2111); the electrode terminal (230) comprises a first conductive portion (231); the first conductive portion (231) is arranged on the side of the first wall (211) facing an accommodating space; and each sealing member (240) is arranged between a corresponding electrode terminal (230) and the first wall (211). When the outside of the casing (210) is stressed, the first wall (211) and the electrode terminals (230) can deform together, so that it is not easy to form gaps between the sealing members (240), which are located between the electrode terminals (230) and the first wall (211), and the first wall (211), and between the sealing members (240) and the electrode terminals (230), thereby maintaining good sealing performance between the sealing members (240) and the first wall (211) and between the sealing members (240) and the electrode terminals (230) and reducing the possibility of liquid leakage of the battery cell (20), and thus reducing the possibility of failure of the battery cell (20) and contamination or corrosion of other mechanisms.

A positive electrode active material and a preparation method therefor, a positive electrode plate, a battery, and an electrical apparatus are disclosed. The positive electrode active material includes a transition metal oxide and a coating layer. The coating layer is coated on at least part of the surface of the transition metal oxide. The coating layer includes a silicon-containing polymer. The silicon-containing polymer is formed by polymerizing a silane monomer derivative containing a first group and polysiloxane containing a second group. The first group is reactive with the second group. The molecular weight of the silane monomer derivative is less than that of the polysiloxane.

The present application provides a manufacturing device and method for an electrode assembly. The manufacturing device for an electrode assembly comprises a winding pin and a heating component, wherein the winding pin is used for winding an electrode sheet and a separator to form a winding structure, and the heating component is configured to be inserted into the winding center of the winding structure and heat the winding structure. By means of the manufacturing device, the heating component can heat the winding structure at the winding center of the winding structure, such that at least some of ion channels in the separator in the inner ring of the winding structure are melt and close, thereby blocking ion shuttling, facilitating reduction of lithium deposition in the winding structure, and effectively lowering the risk of lithium deposition in a battery.

Disclosed are a battery cell (20), a battery (100), and an electric device, where the battery cell (20) includes a housing (21), an electrode assembly (22), a first insulating member (23), and an electrode terminal (24); the electrode assembly (22) includes a tab (221); the housing (21) is configured to accommodate the electrode assembly (22); the housing (21) includes a wall portion; the first insulating member (23) is disposed between the wall portion and the electrode assembly (22); the electrode terminal (24) is disposed on the wall portion; and the electrode terminal (24) passes through the first insulating member (23) and directly connects with the tab (221).

Provided are a separator assembly, a battery cell, a battery and an electric device. The separator assembly comprises a first separator, wherein the first separator comprises a first base film and a first coating, the first coating is located on the surface of at least one side of the first base film, the first coating comprises an inorganic material, and the volume average particle size Dv50 of the inorganic material satisfies: Dv50 ≤0.16 µm. The separator assembly can reduce the risk of short-circuiting a battery cell without deteriorating the rate performance of the battery cell, so that the battery cell has relatively good overall performance.

An energy storage device, an energy storage system and a charging network. The energy storage device (100) comprises at least one energy compartment (10) and at least one control compartment (20), wherein the energy compartment (10) comprises a first compartment body (13) and an energy unit (12), the energy unit (12) being accommodated in the first compartment body (13); the dimension of the energy compartment (10) in a height direction thereof is less than the dimension of a standard container in a height direction thereof; the control compartment (20) is disposed outside the energy compartment (10); and the control compartment (20) comprises a second compartment body (21) and a control module (22), the control module (22) being accommodated in the second compartment body (21), and the control module (22) being used for performing electrical control on the energy unit (12) in the energy compartment (10).

Disclosed in the present application are a container, an energy storage apparatus, an energy storage system and a charging network. The energy storage apparatus comprises containers. There are m containers, where m>2, and the m containers are arranged in the direction of height of the containers. The size of each container in the direction of length thereof is consistent with the size of a standard container in the direction of length thereof, the size of each container in the direction of width thereof is consistent with the size of a standard container in the direction of width thereof, the size of each container in the direction of height thereof is smaller than the size of a standard container in the direction of height thereof, and the sum of the sizes of ml adjacent containers among the m containers in the direction of height thereof is equal to the sum of the sizes of n standard containers in the direction of height thereof. The size of ml containers in the direction of height thereof is equal to the size of n standard containers in the direction of height thereof, such that the space occupied by ml stacked containers is the same as the space occupied by n standard containers, thereby improving the space utilization rate of container placement, and reducing the container transportation cost, thus reducing the use cost of energy storage apparatuses.

Provided in the embodiments of the present disclosure are an energy storage apparatus (100), an energy storage system (2000), and a charging network (1000). The energy storage apparatus (100) includes a control module (30), a plurality of compartment bodies (10), and a plurality of energy units (2). The plurality of compartment bodies (10) are arranged in a first direction of the compartment bodies (10). The plurality of energy units (2) are accommodated in at least one compartment body (10). The control module (30) is configured to electrically control the plurality of energy units (2). The dimension of at least one compartment body (10) among the plurality of compartment bodies (10) in the first direction is smaller than the dimension of one standard container in the first direction, the sum of the dimensions of the plurality of compartment bodies (10) in the first direction is larger than the sum of the dimensions of one or more standard containers in the first direction, and the first direction is the length direction, the width direction, or the height direction of the compartment bodies (10).

The present application discloses a container, an energy storage apparatus, an energy storage device, an energy storage system, and a charging network. The energy storage apparatus comprises containers, the number of containers is m, m≥ 2, and the m containers are arranged in the height direction of the containers. The dimensions of the containers in the length direction thereof are consistent with the dimensions of standard containers in the length direction, the dimensions of the containers in the width direction thereof are consistent with the dimensions of the standard containers in the width direction, the dimension of one container in the height direction is smaller than the dimension of one standard container in the height direction, and the sum of dimensions of adjacent ml containers among the m containers in the height direction is equal to the sum of dimensions of n standard containers in the height direction. The dimensions of the ml containers in the height direction are equal to the dimensions of the n standard containers in the height direction, such that the space occupied by the ml containers when stacked is the same as the space occupied by the n standard containers, improving the utilization of container placement space, and reducing the transportation cost of the containers, thereby reducing the use costs of energy storage apparatuses.

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A fluid collecting component (3), a thermal management assembly (30), a battery (100), and an electric apparatus are provided. The fluid collecting component (3) includes an apparatus body (31), where the apparatus body (31) is provided with a main inlet (311), a main outlet (312), a plurality of branch inlets (313), and a plurality of branch outlets (314), where the plurality of branch outlets (314) are in communication with the main outlet (312); an extension flow channel (315) is formed inside the apparatus body (31); one end of the extension flow channel (315) is in communication with the main inlet (311), and the other end thereof extends toward a side away from the main inlet (311); one of the plurality of branch inlets (313) are in communication with the main inlet (311), and the others are in communication with the extension flow channel (315); the number of the branch inlets (313) is equal to the number of the branch outlets (314), and the branch inlets (313) are in one-to-one correspondence to the branch outlets (314); and the branch inlets (313) are adjacent to the corresponding branch outlets (314).

A fluid collecting pipe fitting (10), a thermal management assembly (100), a battery (1000), and an electric device are provided, where the fluid collecting pipe fitting (10) includes: a pipe body (11); a first flow channel port (12) and a plurality of second flow channel ports (13), where along an extension direction of the pipe body (11), at least two of the second flow channel ports (13) are respectively located on both sides of the first flow channel port (12); and a partition structure (14), where the partition structure (14) is disposed inside the pipe body (11), the partition structure (14) separates the first flow channel port (12) from the second flow channel ports (13) inside the pipe body (11), and the plurality of second flow channel ports (13) are in communication with each other inside the pipe body (11).

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