CATL Patente

A battery cell (20), a battery (10), and an electric device, relating to the technical field of batteries. The battery cell (20) comprises: an electrode assembly (22) comprising a negative electrode sheet, the negative electrode sheet comprising a negative electrode active material which allows for reversible metal ion deintercalation/intercalation, and the negative electrode active material comprising a silicon element; a casing (21), an opening being formed in the casing (21), and the casing (21) being used for accommodating the electrode assembly (22); an end cover (23) covering the opening; and a current collector component (24) accommodated in the casing (21) and located on the side of the electrode assembly (22) facing the end cover (23), wherein the current connector component (24) is electrically connected to a tab of the electrode assembly (22) and the casing (21), the current connector component (24) comprises a current collector body (240) and an elastic portion (241), the current collector body (240) is of an annular structure, the elastic portion (241) is located on the inner side of the current collector body (240) and is connected to the current collector body (240), and at least part of the elastic portion (241) in the thickness direction of the end cover (23) protrudes out of the current collector body (240) and abuts against the end cover (23). The product is beneficial to taking into account of the energy density and reliability of the battery cell (20).

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Provided are a battery (100) and an electric device. The battery (100) includes an insulation board (20), a circuit board (30), and a battery cell (10). The circuit board (30) is disposed on the insulation board (20). In a thickness direction (X) of the insulation board (20), the battery cell (10) is disposed on a side of the insulation board (20). An end of the battery cell (10) facing the insulation board (20) is provided with an electrode terminal (11). A busbar (40) is disposed on the insulation board (20); the busbar (40) includes a first connection layer (41), a second connection layer (42), and a first bent layer (43) connecting the first connection layer (41) and the second connection layer (42); the first connection layer (41) includes a main body region (411) and a connection region (412); the main body region (411) and the second connection layer (42) overlap in the thickness direction (X); the connection region (412) and the second connection layer (42) do not overlap in the thickness direction (X); the connection region (412) is connected to at least one of the electrode terminal (11), the insulation board (20), and the circuit board (30).

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The present application provides a heat exchange component, a battery, and an electric device. The heat exchange component includes a heat exchange plate and a support member. A heat exchange flow channel is provided inside the heat exchange plate. The support member is disposed in the heat exchange flow channel, and two ends of the support member are separately connected to a wall part of the heat exchange flow channel. By disposing the support member in the heat exchange flow channel, the pressure-bearing capacity of the heat exchange plate is improved, the problems in the prior art of blockage of the heat exchange component, low capacity of a heat exchange medium inside the heat exchange plate, and excessive weight of the heat exchange component, which are caused by using the solutions of increasing the wall thickness of the heat exchange flow channel and reducing the diameter of the heat exchange flow channel in order to maintain the pressure resistance of the heat exchange component, are mitigated, the heat exchange effect the heat exchange component and the reliability of the heat exchange component are improved, and the energy density of the battery is increased.

A battery winding apparatus (1), a battery production line, and a control method therefor, which belong to the technical field of battery production. The battery winding apparatus includes: a support member (11); an alignment roller set (13), movably installed on the support member and used for aligning a plurality of composite electrode sheets (2); a winding needle (12), rotatably installed on the support member (11) and used for winding the plurality of composite electrode sheets (2); a feeding roller set (14), movably installed on the support member (11) between a standby station and a clamping station in a first direction, and configured to, when located at the clamping station, clamp a blank separator of one composite electrode sheet (2) between the winding needle (12) and the alignment roller set (13) and move in a second direction to adjust a distance between two composite electrode sheets (2); and a cutter assembly (15), movably installed on the support member (11) and used for cutting off the composite electrode sheets (2).

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A battery (200) and an electrical device (100), which apply to the technical field of traction batteries. The battery comprises: a housing (300), which is configured to accommodate battery cells (30); at least two fixing beams (71), wherein the at least two fixing beams are spaced apart in the housing, a space for accommodating the battery cells being formed between every two adjacent fixing beams; fixing seats (72) arranged on the fixing beams; and limiting members (73) which are connected to the fixing seats on different fixing beams. Connecting the limiting members to different fixing beams enables deformation of the fixing beams to be suppressed by means of the limiting members, thus enhancing the strength of the fixing beams, and reducing a degree of deformation of the fixing beams along with the expansion of the battery cells. By means of the provision of the fixing seats, the strength at the joints between the limiting members and the fixing beams is enhanced to reduce failures such as breakage at the joints between the limiting members and the fixing beams; thus, the strength of the fixing beams is further enhanced, thereby better suppressing the expansion of the battery cells, improving the performance of the battery, and reducing potential safety hazards.

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