CATL Patente

A battery cell (7), a battery (2), and an electrical apparatus. The battery cell (7) comprises a casing (20), an electrode assembly (10), and an electrode terminal (30). The casing (20) comprises a wall portion (23). The electrode assembly (10) is accommodated in the casing (20) and comprises tabs (12). The electrode terminal (30) is arranged on the wall portion (23); the side of the electrode terminal (30) away from the electrode assembly (10) in the thickness direction of the wall portion (23) is provided with an outer surface (31), the electrode terminal (30) is provided with a recessed portion (32) recessed from the outer surface (31), the electrode terminal (30) comprises a connecting portion (33) arranged at the bottom of the recessed portion (32), and the connecting portion (33) is electrically connected to the tabs (12).

A heat exchange tube (10), a battery (1000), and an electric apparatus are provided. The heat exchange tube (10) includes a plurality of straight heat exchange sections (11) and at least one bent section (12). The plurality of straight heat exchange sections (11) are spaced apart. The at least one bent section (12) sequentially connects and communicates with the plurality of straight heat exchange sections (11); where at least one bent section (12) is provided with a first reinforcement member (20).

Disclosed are a heat exchange assembly, a battery, and an electrical apparatus. The heat exchange assembly is configured to exchange heat with a battery cell and includes a plurality of heat exchange tubes, each heat exchange tube has two end portions; when one of the two end portions is used for liquid intake, the other one is used for liquid output; and at least one side of the periphery of the heat exchange assembly locally forms a converging position, and at least one end portion of each heat exchange tube extends to the converging position.

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

A current collector, an electrode sheet, a secondary battery, an electric device, a copper foil, and a preparation method for the copper foil. The current collector comprises the copper foil, the average particle size of the crystal grains in the copper foil ranges from 50 nm to 400 nm, and based on the total number of crystal grains in the copper foil, the proportion of the crystal grains of nano twin crystals is greater than or equal to 60%. The combination of the high proportion nano twin crystal structure and the small crystal grain size functions to improve the mechanical strength of the current collector while maintaining the high plasticity of the current collector, thereby providing a material basis for further improvement of the energy density and safety of the battery.

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.

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).

A battery (100) and an electrical device, relating to the field of batteries. The battery (100) comprises battery cells (20) and a support member (30). Each battery cell (20) comprises a housing (21) and a pressure relief component (212). The housing (21) comprises a first wall portion (211), and the pressure relief component (212) is provided on the first wall portion (211). The pressure relief component (212) comprises a first groove (2121), and is configured to crack along the first groove (2121) during pressure relief of the battery cell (20). The support member (30) supports the first wall portion (211). The support member (30) has a support surface (31) facing the first wall portion (211), and the support surface (31) is provided with a clearance portion (32). In the direction of thickness of the first wall portion (211), a projection of the first groove (2121) lies within the clearance portion (32). By providing the clearance portion (32) on the support member (30) and by allowing the projection of the first groove (2121) in the direction of thickness of the first wall portion (211) to lie within the clearance portion (32), the clearance portion (32) can provide clearance for the first groove (2121). Thus, during pressure relief of the battery cell (20), the support member (30) is less likely to abut against the outer side of the first groove (2121), reducing the likelihood of suppressing the cracking of the first groove (2121). This arrangement ensures that the first groove (2121) can crack promptly during pressure relief of the battery cell (20), thereby helping to improve the reliability of the battery (100).

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).

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …