CN-224232757-U - Battery cell cap structure and cylindrical battery

CN224232757UCN 224232757 UCN224232757 UCN 224232757UCN-224232757-U

Abstract

The utility model discloses a battery core cap structure and a cylindrical battery, wherein the battery core cap structure comprises a cover plate and a sealing piece, the shape of the cover plate is matched with that of a battery core, the cover plate is arranged at the top of a tab of the battery core, a gap is formed between the cover plate and a shell of the battery core, and the sealing piece is arranged in the gap to seal the battery core. The battery core cap structure provided by the utility model has the advantages that the number of parts is small, the thickness is small, so that the preparation process of the battery core cap structure is simple, the cost is low, the occupied effective space of a battery can be reduced, the energy density of the battery is further improved, and the cost of the battery is reduced.

Inventors

JIN JIANLI
LIU CHANGLAI
SUN QUAN
Fan Quying
SUN LONG
LIU YONG
GAO GUOXING

Assignees

骆驼集团新能源电池襄阳有限公司

Dates

Publication Date: 20260512
Application Date: 20250314

Claims (8)

1. The utility model provides a battery cell cap structure which characterized in that includes: The shape of the cover plate is matched with that of the battery cell, the cover plate is arranged at the top of the lug of the battery cell, and a gap is reserved between the cover plate and the shell of the battery cell; a seal disposed in the gap to seal the cell; The explosion-proof valve, the apron is formed with the through-hole, the explosion-proof valve set up in the through-hole, the apron is gone up and is avoided the position of through-hole is formed with the recess, the recess by the apron is kept away from one side of electric core towards being close to one side of electric core extends and the bottom is less than the apron, the bottom of recess with the utmost point ear is connected.
2. The cell cap structure of claim 1, wherein the recess is located at a middle position of the cover plate.
3. The cell cap structure of claim 2, wherein a bottom surface of the recess has a thickness less than a thickness of the cover plate at other locations from which the recess is removed.
4. The cell cap structure of claim 3, wherein the side thickness of the recess is the same as the bottom thickness of the recess.
5. The battery cell cap structure according to claim 1, wherein the cover plate comprises a first cover plate and a second cover plate, the first cover plate and the second cover plate are respectively connected with two tabs of the battery cell, the first cover plate, the second cover plate and the housing have the gap therebetween, the sealing member is disposed in the gap, and the first cover plate is formed with the through hole.
6. The battery cell cap structure according to claim 1, wherein the cover plate comprises a first cover plate and a second cover plate, the first cover plate and the second cover plate are respectively connected with two tabs of the battery cell, the first cover plate, the second cover plate and the housing have the gap therebetween, the sealing member is disposed in the gap, and the second cover plate is formed with the through hole.
7. The cell cap structure of claim 5 or 6, wherein the seal comprises a first seal disposed in the gap formed by the first cover plate and the second cover plate, and a second seal disposed in the gap formed by the first cover plate and the second cover plate, respectively, with the housing.
8. A cylindrical battery, comprising: A housing; The winding core is arranged inside the shell; A tab connected to the top of the winding core, and The cell cap structure according to any one of claims 1 to 7, wherein the cell cap structure is connected to the tab through the cover plate, and the cell cap structure is hermetically connected to the housing through the seal member.

Description

Battery cell cap structure and cylindrical battery Technical Field The utility model relates to the technical field of cylindrical batteries, in particular to a battery cell cap structure and a cylindrical battery. Background The cell cap of the traditional cylindrical battery consists of a top cover, a thermistor, a rupture valve, a plastic sleeve, a bottom plate and other parts, such as a cylindrical battery explosion-proof device and a cylindrical battery cap structure disclosed in Chinese patent publication No. CN 219959308U. However, in the prior art, the number of parts constituting the cap is large, so that the problems of complex manufacturing process and high cost of the battery core are caused, and the parts are generally thicker in the thickness direction of the cap, so that the problem of occupying more effective volume of the battery is caused, and the improvement of the energy density of the cylindrical battery is limited. Disclosure of utility model In view of the above, the utility model provides a battery core cap structure and a cylindrical battery, which achieve the purpose of reducing the thickness of the cap by reducing the number of parts, and solve the technical problems that the prior cap structure occupies more volume of the battery, is unfavorable for improving the energy density of the battery, and has complex preparation process and higher cost. In order to achieve the technical purpose, the utility model adopts the following technical scheme: in a first aspect, the present utility model provides a battery cell cap structure, including: The shape of the cover plate is matched with that of the battery cell, the cover plate is arranged at the top of the lug of the battery cell, and a gap is reserved between the cover plate and the shell of the battery cell; and the sealing piece is arranged in the gap to seal the battery cell. In some embodiments, the cover plate is formed with a through hole, and the explosion-proof valve is disposed in the through hole. In some embodiments, a groove is formed on the cover plate at a position avoiding the through hole, the groove extends from one side of the cover plate away from the battery core to one side close to the battery core, the bottom of the groove is lower than the cover plate, and the bottom of the groove is connected with the tab. In some embodiments, the recess is located at a mid-position of the cover plate. In some embodiments, the bottom surface of the recess has a thickness less than the thickness of the cover plate at other locations from which the recess is removed. In some embodiments, the side thickness of the groove is the same as the bottom thickness of the groove. In some embodiments, the cover plate includes a first cover plate and a second cover plate, the first cover plate and the second cover plate are respectively connected with two tabs of the battery cell, the first cover plate, the second cover plate and the housing have the gap therebetween, the sealing element is disposed in the gap, and the first cover plate is formed with the through hole. In some embodiments, the cover plate includes a first cover plate and a second cover plate, the first cover plate and the second cover plate are respectively connected with two tabs of the battery cell, the first cover plate, the second cover plate and the housing have the gap therebetween, the sealing element is disposed in the gap, and the second cover plate is formed with the through hole. In some embodiments, the seal comprises a first seal disposed in the gap formed by the first cover plate and the second cover plate, and a second seal disposed in the gap formed by the first cover plate and the second cover plate, respectively, with the housing. In a second aspect, the present utility model also provides a cylindrical battery comprising: A housing; The winding core is arranged inside the shell; a tab connected to the top of the winding core, and According to the battery cell cap structure disclosed by the first aspect of the utility model, the battery cell cap structure is connected with the electrode lug through the cover plate, and the battery cell cap structure is connected with the shell in a sealing way through the sealing piece. Compared with the prior art, the utility model has the beneficial effects that: The battery core cap structure provided by the utility model consists of the cover plate and the sealing element, the number of parts is small, the process is simple during preparation, the cost can be reduced, and the cap structure only has one part of the cover plate in the thickness direction, so that the thickness of the cap structure is greatly reduced, the effective volume of a battery occupied by the cap structure arranged on the battery core is also greatly reduced, and therefore, the energy density of the battery can be improved. Drawings Fig. 1 is a schematic structural view of a conventional cap structure; FIG. 2 is a schematic view of an embodiment