CN-224232751-U - Battery top cover

Abstract

The utility model provides a battery top cover which comprises a top cover plate, lower plastic, a pole column assembly, an upper plastic and a main body part, wherein the lower plastic is provided with a first penetrating hole and a second penetrating hole, the pole column assembly comprises an upper pole column and a lower pole column, the upper pole column and the lower pole column are connected in a welding mode, the upper plastic is arranged between the top cover plate and the upper pole column to insulate the upper pole column from the top cover plate, the main body part is positioned in a gap between the upper pole column and the top cover plate in the up-down direction, and the main body part penetrates through the first pole column through hole and the first penetrating hole and is positioned outside the upper pole column to seal the gap between the lower plastic and the upper pole column. The secondary battery top cover of the utility model can prevent the creepage phenomenon between the upper pole and the top cover plate due to the flange part arranged at the upper end of the sealing ring, thereby improving the safety performance of the battery top cover.

Inventors

• HUANG XIAOWEI
• HE QINGQING
• TANG XIAOWEI
• ZOU WEIWEI
• LIU BIN
• LI TAO
• Li shuibao
• TAO QIONGCHENG

Assignees

• 江西赣锋锂电科技股份有限公司

Dates

Publication Date

20260512

Application Date

20250331

Claims (8)

1. 1. A battery top cover comprising: The top cover plate is provided with a first pole through hole and a second pole through hole; A lower plastic provided with a first penetration hole and a second penetration hole, the lower plastic being configured to be connected with the top cover plate; The pole assembly comprises an upper pole and a lower pole, wherein the upper pole passes through the first pole through hole and the first penetrating hole, The upper pole and the lower pole are connected in a welding mode; the upper plastic is arranged between the top cover plate and the upper pole to insulate the upper pole from the top cover plate; The sealing ring is characterized by further comprising a sealing ring, wherein the sealing ring comprises a main body part and a flange part which extends outwards from the main body part in the radial direction, the flange part is positioned in a gap between the upper pole and the top cover plate in the vertical direction, and the main body part passes through the first pole through hole and the first penetrating hole and is positioned outside the upper pole so as to seal the gap between the lower plastic and the upper pole.
2. 2. The battery top cover of claim 1, wherein the upper post comprises an upper end, a middle portion, and a lower end, wherein the upper end has a cross-sectional area greater than the cross-sectional area of the middle portion, and wherein the middle portion has a cross-sectional area greater than the area of the lower end.
3. 3. The battery top cover of claim 2, wherein the sealing ring is made of a fluororubber material.
4. 4. The battery top cover of claim 2, wherein the upper end portion is rectangular parallelepiped, and the middle portion and the lower end portion are cylindrical.
5. 5. The battery top cover of claim 2, wherein the upper end is cylindrical.
6. 6. The battery top cover of claim 2, wherein said lower terminal post is connected to said lower end of said upper terminal post by welding.
7. 7. The battery top cover of claim 3, wherein the bottom of the upper plastic is further provided with a vent slot.
8. 8. The battery top cover of claim 3, wherein the upper and lower posts are made of different metallic materials.

Description

Battery top cover Technical Field The utility model relates to the field of batteries, in particular to a battery top cover. Background The secondary battery (Rechargeable battery) is also called a rechargeable battery or a storage battery, and the secondary battery can activate an active substance in a charging manner after discharging to continue to use, so that the secondary battery gradually becomes a main power source of an electricity utilization system due to the recycling characteristic, but with the vigorous development of new energy, various companies are used for oligomerization of new energy tracks, the fierce competition leads to higher and higher requirements on cost, and in addition, for a new energy electric vehicle, the battery needs to realize a short-time quick charging function, but the direct problem caused by quick charging is that high temperature is caused when a large current passes, so that the battery top cover also needs to have high temperature resistance. Therefore, development of a battery top cover with low cost, high temperature resistance and high cost performance is urgently needed. Currently, the battery top cover commonly used in the market mainly comprises a traditional column top cover, a very simple top cover, a riveted top cover, a binding top cover, a nano top cover and the like, but the conventional battery top cover cannot meet the requirements of customers in the current market, and has low cost, high temperature resistance, high safety and the like. Disclosure of utility model The utility model provides a battery top cover, which aims to improve high temperature resistance and safety performance of the battery top cover and reduce production cost of the battery, and comprises a top cover plate, a lower plastic, a pole assembly, an upper pole and a lower pole, wherein the top cover plate is provided with a first pole through hole and a second pole through hole, the lower plastic is provided with a first penetrating hole and a second penetrating hole, the lower plastic is connected with the top cover plate, the upper pole passes through the first pole through hole and the first penetrating hole, the upper pole and the lower pole are connected in a welding mode, the upper plastic is arranged between the top cover plate and the upper pole to insulate the upper pole from the top cover plate, the sealing ring comprises a main body part and a flange part extending outwards from the main body part in the radial direction, the flange part is positioned in a gap between the upper pole and the top cover plate, and the main body part passes through the first pole through hole and the first penetrating hole and is positioned between the upper pole and the lower plastic and the outer side of the upper pole. Further, the upper pole comprises an upper end portion, a middle portion and a lower end portion, wherein the cross-sectional area of the upper end portion is larger than that of the middle portion, and the cross-sectional area of the middle portion is larger than that of the lower end portion. Further, the seal ring is made of fluororubber material. Further, the upper end portion is a rectangular parallelepiped, and the intermediate portion and the lower end portion are cylindrical. Further, the upper end portion is cylindrical. Further, the lower pole is connected to the lower end portion of the upper pole portion by welding. Further, the bottom of the upper plastic is also provided with an exhaust groove. Further, the upper and lower poles are made of different metal materials. In summary, since the flange part is disposed at the upper end of the sealing ring, the secondary battery top cover of the present utility model can prevent the creepage phenomenon between the upper pole and the top cover plate, thereby improving the safety performance of the battery top cover. Drawings FIG. 1 is a schematic view of a battery top cover of the present utility model; FIG. 2 is an exploded view of the battery top cover of the present utility model; FIG. 3 is a schematic view of another angle of the battery top cover of the present utility model; FIG. 4 is a schematic view of a battery top cover of the present utility model at yet another angle; FIG. 5 is a schematic view in partial cross-section taken along line A-A of FIG. 4; FIG. 6 is a schematic view of a seal ring in a battery top cover of the present utility model; FIG. 7 is a schematic view of the upper pole in the battery top cover of the present utility model; fig. 8 is a schematic view of the upper plastic in the battery top cover of the present utility model. Detailed Description The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. Referring to fig. 1-8, the secondary top cover of the present utility model comprise