4results about How to "Guaranteed overcurrent capability" patented technology

This utility model proposes a cylindrical secondary battery, including a positive electrode current collector and a negative electrode current collector. The positive electrode current collector includes a disk body and a tail body. The disk body is provided with multiple positive electrode welding areas. The area of ​​the disk body is S1, and the sum of the areas of the multiple positive electrode welding areas is S2. 100 12%S1≤S 100 ≤24%S1; The negative electrode current collector is provided with multiple negative electrode welding areas, and each negative electrode welding area is provided with multiple negative electrode solder marks. The area of ​​the negative electrode current collector is S2, and the sum of the areas of the multiple negative electrode welding areas is S. 200 Among them, 10%S²≤S 200 ≤20%S2. This utility model, by setting a positive electrode welding area and a positive electrode solder mark on the positive electrode current collector, and setting a negative electrode welding area and a negative electrode solder mark on the negative electrode current collector, and by reasonably setting the area of ​​the positive electrode welding area and the negative electrode welding area, can take into account the battery's overcurrent capacity as well as the battery's processing quality and processing efficiency, thereby effectively improving the overall performance of the battery.

This utility model provides a battery, a battery pack, and a battery device. The battery includes a shell, a cover plate, terminals, and an insulating component. The cover plate covers the opening of the shell to form the outer shell of the battery, and has mounting holes. The terminals pass through the mounting holes, with their end faces exposed. The insulating component is located between the outer periphery of the terminals and the inner edge of the mounting holes, providing insulation for the terminals and the cover plate. The end faces form welding positions for busbar welding. Since the minimum distance d1 between the insulating components and the heat deformation temperature k of the insulating components satisfy 300 mm·℃ ≤ d1*k ≤ 1900 mm·℃, the welding position area and weld length can be guaranteed, ensuring the current carrying capacity of the terminals and busbars, while preventing the insulating components from melting under the residual heat of welding, thereby ensuring the insulation performance of the insulating components.

This application discloses a battery that reduces the problem of poor soldering between the adapter and the terminal caused by inserting the tab between the terminal and the adapter piece, and also reduces the situation where the adapter piece melts and fails due to overlap between the tab and the terminal. The battery includes: a casing, terminals, a cell, an adapter piece, and an insulating component. The casing has a first wall; the terminal is mounted on the first wall; the cell is disposed in the casing, and the cell includes a cell body and a tab, the tab including a connecting portion; the adapter piece is connected to the end of the terminal facing the cell and is located between the first wall and the cell body; the connecting portion is located on the side of the adapter piece away from the cell body and is located on the periphery of the terminal, the connecting portion being electrically connected to the adapter piece; the insulating component is disposed between the first wall and the adapter piece, and the insulating component has a groove for accommodating the connecting portion.

The utility model provides a kind of cylindrical lithium ion battery, including positive current collector and roll core, wherein, disc body is equipped on positive current collector, disc body and the full tab end surface of roll core are welded fixed;The radius of roll core is R0, and the shortest distance of disc body edge to roll core edge is L4, and the radius of roll core and the shortest distance of disc body edge to roll core edge satisfy: L4 / R0=8.6~12.6%.The cylindrical lithium ion battery passes through the proportion range of radius of roll core and the shortest distance of disc body edge to roll core edge by reasonable setting, can both ensure in shell wall to the deformation of axis center, also cannot easily contact the disc body edge of positive current collector, effectively reduce short-circuit risk;It can also ensure that disc body and roll core have enough weldable area, maintain the overcurrent capacity of welding wire, avoid that welding wire place temperature rises too high, to guarantee the safety and performance of battery.