10results about How to "Guaranteed overcurrent capability" patented technology

The invention relates to the technical field of batteries, and discloses a battery, a battery box and an electric automobile, and the battery comprises a battery cell which comprises a body part and a battery cell output part, and one end, connected with the body part, of the battery cell output part is a root part of the battery cell output part; the electrode terminal assembly is welded with the battery cell output part and forms a first connecting area, and the first connecting area is provided with a first edge close to the body part and a second edge far away from the body part in the first direction; wherein in the state that the battery cell output part is leveled in the first direction, the distance between the root part and the second edge is a, the distance between the root part and the first edge is b, the fault rate of the battery cell output part in the first connection area is c, and b / (a * c) is larger than or equal to 0.003 and smaller than or equal to 0.04. The over-current capability between the electrode terminal assembly and the battery core output part is ensured, the voltage jump of the battery is avoided, the reliability of the battery is ensured, the safety problems of thermal runaway of the battery and the like are avoided, and the safety performance of the battery is ensured.

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 invention relates to the field of battery technology and proposes a battery comprising: a battery casing with an electrolyte injection hole; and a battery cell disposed within the battery casing, the battery cell including a cell body and a tab, the tab extending from the side of the cell body, the electrolyte injection hole located on the side of the cell body near the tab, and the electrolyte injection hole being disposed on the surface of the battery casing opposite the large surface of the tab; wherein, in a direction perpendicular to the extension direction of the cell body and the tab, the minimum vertical distance between the electrolyte injection hole and the tab is 'a', the width of the cell body is 'b', and 5 ≤ b / a ≤ 20, which not only avoids the impact of electrolyte injection on the tab but also ensures the width of the tab, thereby ensuring the current carrying capacity of the cell and the charge / discharge rate of the battery, thus improving the battery's performance.

The utility model relates to a cylindrical battery cathode collector plate welding structure and a cylindrical secondary battery. Relates to the technical field of new energy batteries. The battery comprises a cathode collector plate and a welding mark arranged on the cathode collector plate, the cathode collector plate is used for connecting the cathode of the roll core with the bottom of a battery shell, and the welding mark is used for connecting the cathode collector plate with the cathode of the roll core; and the ratio L0 / R0 of the length L0 of the welding mark to the radius R0 of the negative collector plate is 37%-57%. According to the cylindrical secondary battery, the ratio L0 / R0 of the length L0 of the welding mark to the radius R0 of the negative collector plate is set between 37% and 57%, and the length L0 of the welding mark is prevented from being too large or too small, so that the overcurrent capacity of the welding mark can be ensured, the welding reject ratio can be reduced, the welding reliability is enhanced, and the performance of the cylindrical secondary battery is further ensured.

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 application relates to the field of batteries and battery packs. The battery comprises a shell, a battery cell arranged in the shell, and a cover plate assembly arranged at an opening of the shell; the cover plate assembly comprises a cover plate body and a pole post, and a tab of the battery cell is electrically connected to the pole post; the cover plate body is provided with a pole post hole; the pole post is arranged in the pole post hole and connected to the cover plate body; the pole post is provided with a first surface, the first surface is used for electrical connection with a bus bar, the area of the first surface is s, the vertical distance between the first surface and the outer surface of the cover plate body is h, and s / h satisfies 5-500. The size of the pole post is controlled to effectively balance the heat generation and the connection strength of the pole post.

The utility model provides a kind of battery, battery pack and battery device, it is related to battery structure technical field, battery includes shell, shell has accommodating cavity, shell has opening in one end;Cover plate, cover plate is used to cover opening, and mounting hole is opened in cover plate;Pole, the first end of pole is worn in mounting hole;Insulating component, insulating component is located between the outer periphery of pole and the inner edge of mounting hole;And busbar, busbar is welded with the first surface of pole;The material quality that busbar adopts includes first metal and first alloy element doped in first metal, the melting point of first alloy element is higher than the melting point of first metal;The welding area between busbar and the first surface of pole on the first surface of pole is ratio a, and the content ratio b of first alloy element in busbar, between both satisfy: 0.00001≤a*b≤0.05.The utility model can solve the problem of melting insulating component when busbar is welded.

The application relates to the technical field of batteries, in particular to a battery monomer, a battery pack and a power utilization device. The application provides a battery monomer, which comprises a battery cell and insulating glue. The battery cell comprises a battery cell body and a tab part. The tab part has an adhesive surface. The adhesive surface has a connecting area and a welding mark area. The connecting area connects the battery cell body and the welding mark area. The insulating glue comprises a first part, a second part and a third part which are sequentially connected. The adhesion of the second part is smaller than that of the first part, and the adhesion of the second part is smaller than that of the third part. The first part is bonded to the battery cell body, the third part is bonded to the welding mark area, and the second part covers the connecting area. The application can reduce the tearing of the tab part caused by the pulling of the insulating glue.

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.