CATL Patente

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An electrode sheet, a battery cell, a battery, an electrical device and a manufacturing method for the electrode sheet, which can improve the yield of battery cells. The electrode sheet comprises: a first current collector, a first conductive layer and a first layer; the first current collector comprises a first body and a tab area connected to the edge of the first body; the first body comprises a coating area and an edge area, the first conductive layer being arranged on the surface of the coating area, the first layer being arranged on the surface of the edge area, and the porosity of the first layer being less than that of the first conductive layer.

The present application relates to the technical field of batteries, and provides a battery cell, a battery, and a power consuming apparatus. The battery cell (20) includes: a shell (21), where a first wall (211) of the shell is provided with an electrode leading-out hole (212); an electrode assembly (22), arranged in the shell, where the electrode assembly is provided with an electrode connecting member (221); and an electrode terminal (23), including a body (231) and a terminal post (232) protruding from one side of the body, where the terminal post penetrates through the electrode leading-out hole, and the body is arranged in the shell and is electrically connected to the electrode connecting member. The body has a first side surface (231a) and a second side surface (231b) arranged opposite to each other along a first direction. A distance between the first side surface and the terminal post is greater than a distance between the second side surface and the terminal post. The battery cell provided in the present application can optimize an arrangement space of components in the battery cell.

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Embodiments of the present application provide a battery cell and a manufacturing method thereof, a battery, and an electric apparatus. The battery cell includes: a housing (1), including a first wall (13); an electrode assembly (3), disposed within the housing (1), where the electrode assembly (3) includes an electrode body (31) and a first tab (32), and the first tab (32) is led out from the electrode body (31); and a first current collector (4), configured to electrically connect the first tab (32) to the first wall (13), where the first current collector (4) is connected to an inner surface of the first wall (13) by a first weld seam (41), and the first weld seam (41) does not penetrate to an outer surface of the first wall (13).

Provided are a case, a battery, an electric device and a method for assembling a case. The case comprises a frame (20) and an end plate (10) connected to the frame (20), wherein the end plate (10) comprises a first connecting portion (11) and a second connecting portion (21) both facing the frame (20); a circumferential edge of the first connecting portion (11) and a circumferential edge of the second connecting portion (21) are both connected to the frame (20); and the whole circumferential edge of at least one of the first connecting portion (11) and the second connecting portion (21) is continuously in sealed connection with the frame (20). The end plate (10) and the frame (20) are connected in a dual-connection fastening method in which the first connecting portion (11) and the second connecting portion (21) are configured to respectively connect to the frame, such that the case has a simple structure, is convenient to assemble, and has a high assembly efficiency, a low cost and good reliability.

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Embodiments of the present application provide a battery cell, a battery, and a power consuming device, and belongs to the field of battery technologies. The battery cell includes a housing and an electrode assembly. The housing includes a first half region and a second half region. Along a length direction of the housing, a part from a middle section of the housing to an end of the housing is the first half region, a part from the middle section of the housing to the other end of the housing is the second half region, a length of the housing is L, L≥80 mm, and the middle section is perpendicular to the length direction. The electrode assembly is accommodated in the housing. The electrode assembly includes a body portion and a tab, at least one end of the body portion along the length direction is provided with the tab, a part of the body portion is located in the first half region, and the other part of the body portion is located in the second half region. The first half region and the second half region are each provided with at least one pressure relief mechanism, the body portion is provided with a central hole, along the length direction, the central hole runs through the body portion, and the central hole is configured to communicate an internal space of the first half region with an internal space of the second half region. The reliability of the battery cell can be effectively improved.

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This application discloses a power supply control circuit, a power supply control method, and an apparatus. The power supply control circuit includes a first power module, a second power module, and a switch module; where the first power module is connected to an electric module; the second power module is connected to the electric module through the switch module; in a case that a voltage of the first power module is greater than or equal to a threshold voltage, the switch module is turned off, and the first power module is configured to supply power to the electric module; and in a case that the voltage of the first power module is less than the threshold voltage, the switch module is turned on, and the second power module is configured to supply power to the electric module. According to embodiments of this application, power supply reliability can be improved.

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The present application provides a battery cell (20), a battery (100), and an electrical device. The battery cell (20) comprises: a casing (21), electrode assemblies (22), and a thermal insulation member (23). The casing (21) has an accommodating cavity (211); a plurality of electrode assemblies (22) are provided, and the plurality of electrode assemblies (22) are accommodated in the accommodating cavity (211); the thermal insulation member (23) is arranged between two adjacent electrode assemblies (22), wherein the thickness H of the thermal insulation member (23) and the energy E of each electrode assembly (22) satisfy the relationships: 25 Wh/mm ≤ E/H ≤ 750 Wh/mm.