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CN-224232754-U - Battery and battery cover plate assembly thereof

CN224232754UCN 224232754 UCN224232754 UCN 224232754UCN-224232754-U

Abstract

The utility model discloses a battery cover plate assembly, which comprises a cover plate body and a pole column assembly, wherein the pole column assembly comprises a pole column and a pressing part, the pole column is protruded out of the cover plate body, the pressing part and the cover plate body are integrally arranged, the pressing part is pressed on the surface of the pole column far away from the cover plate body, an insulating part is arranged on the cover plate body, the insulating part comprises a first insulating part and a second insulating part, the first insulating part is arranged on the surface of the cover plate body, the second insulating part comprises a convex hull structure, the convex hull structure is wrapped on the pole column assembly, and the breaking elongation of the second insulating part is larger than that of the first insulating part. The electric battery cover plate assembly provided by the utility model realizes reliable insulation protection of the polar column, improves the impact resistance performance of the insulating part, and realizes better protection of the battery. The utility model also discloses a battery.

Inventors

  • SHEN YANHONG

Assignees

  • 中创新航科技集团股份有限公司

Dates

Publication Date
20260512
Application Date
20250421

Claims (14)

  1. 1. The utility model provides a battery cover plate assembly, its characterized in that, includes apron body and utmost point post subassembly, utmost point post subassembly include utmost point post and pressfitting portion, utmost point post protrusion in apron body sets up, pressfitting portion and apron body are integrative to be set up, pressfitting portion part pressure is located the utmost point post is kept away from the surface of apron body, be provided with the insulating part on the apron body, the insulating part includes first insulating part and second insulating part, first insulating part set up in the surface of apron body, the second insulating part includes the convex closure structure, the convex closure structure package is located on the utmost point post subassembly, the elongation at break of second insulating part is greater than the elongation at break of first insulating part.
  2. 2. The battery cover assembly of claim 1, wherein the ratio of the elongation at break of the second insulator to the elongation at break of the first insulator is 60-380.
  3. 3. The battery cover plate assembly of claim 1 or 2, wherein the first insulating member has an elongation at break of 0.2% -5% and the second insulating member has an elongation at break of 50% -80%.
  4. 4. The battery cover plate assembly according to claim 1 or 2, wherein the heat resistant temperature of the first insulating member is not less than 200 ℃.
  5. 5. The battery cover assembly of claim 1, wherein the first insulator has a first through hole for the pole, and the second insulator is connected to the first through hole.
  6. 6. The battery cover assembly of claim 5, wherein the second insulating member comprises a connecting bottom edge and a protective top edge, the connecting bottom edge and the protective top edge being connected by a connecting side, the connecting bottom edge being connected to the first insulating member, the connecting side being located around a side of the post, the protective top edge being located at least partially in correspondence with the nip, the protective top edge being crimped to a top of the nip; The second insulating piece is provided with a second through hole for arranging the pole.
  7. 7. The battery cover assembly of claim 6, wherein an outer edge of the connection base is larger than an aperture edge of the first through hole, the connection base being connected to the first insulating member or the cover body; The connecting bottom edge is positioned below the first insulating piece; Or the connecting bottom edge is positioned above the first insulating piece.
  8. 8. The battery cover assembly of claim 7, wherein the connecting base is bonded to the first insulator or the cover body.
  9. 9. The battery cover assembly of claim 6, wherein a ratio of an outer edge dimension of the connecting bottom edge to an aperture edge dimension of the first through hole is 1-2.
  10. 10. The battery cover assembly of claim 6, wherein the outer edge of the connecting bottom edge is disposed corresponding to the hole edge of the first through hole, and wherein the connecting bottom edge is connected to the sidewall of the first through hole.
  11. 11. The battery cover assembly of claim 6, wherein a face of the protective top edge away from the nip is lower than a top face of the post by a first distance H1 of 0.2-2 mm.
  12. 12. The battery cover assembly of claim 6, wherein a second distance H2 is between a face of the connecting side adjacent to the pole and a side of the press-fit portion, and the second distance H2 is 0.2-1 mm.
  13. 13. The battery cover assembly of claim 1, wherein the heat resistant temperature of the first insulator is greater than the heat resistant temperature of the second insulator.
  14. 14. A battery comprising a housing and a cover assembly, wherein a cell is disposed in the housing, and the cover assembly is connected to a top opening of the housing, wherein the cover assembly is a battery cover assembly as claimed in any one of claims 1 to 13.

Description

Battery and battery cover plate assembly thereof Technical Field The utility model relates to the technical field of batteries, in particular to a battery and a battery cover plate assembly thereof. Background The lithium battery has the advantages of high energy density, long service life and the like, and is widely applied to electric automobiles, standby power supply systems and micro-grid energy storage systems. The battery comprises a shell, a battery core and a cover plate, wherein the battery core is arranged in a cavity of the shell, and the cover plate is covered and sealed on an opening at the top end of the shell. Because the cover plate is made of metal, the cover plate is easy to charge, and therefore an insulating plate is required to be arranged on the cover plate so as to insulate the battery from other structures. In the pole battery, as shown in fig. 1, the cover plate 01 is riveted on the edge of the pole 03 through the pressing portion 02, and the pressing portion 02 and the cover plate 01 are of an integral structure, so that how to realize insulation of the pole 03 is a technical problem to be solved in the present day. Disclosure of utility model In view of the above, the utility model provides a battery cover plate assembly, which realizes reliable insulation protection of a pole, improves the impact resistance performance of an insulating piece and realizes better protection of a battery. The utility model also provides a battery. In order to achieve the above purpose, the present utility model provides the following technical solutions: The utility model provides a battery cover plate assembly, includes apron body and utmost point post subassembly, utmost point post subassembly include utmost point post and pressfitting portion, utmost point post protrusion in apron body sets up, pressfitting portion and apron body set up integratively, pressfitting portion part press locate the utmost point post is kept away from the surface of apron body, be provided with the insulating piece on the apron body, the insulating piece includes first insulating piece and second insulating piece, first insulating piece set up in the surface of apron body, the second insulating piece includes the convex closure structure, the convex closure structure package is located on the utmost point post subassembly, the elongation at break of second insulating piece is greater than the elongation at break of first insulating piece. According to the technical scheme, the battery cover plate assembly provided by the utility model has the advantages that the breaking elongation of the second insulating piece is larger than that of the first insulating piece, so that the second insulating piece can form a convex hull structure, and insulation protection of the pole is realized. The elongation at break of first insulating part is less than the elongation at break of second insulating part, and the part of first insulating part sets up relatively with electric core middle part, and the battery is at charge and discharge's in-process like this, and gaseous heat is strikeed when the apron body, first insulating part can better bear gaseous heat's impact force for first insulating part is difficult for deformation, through the elongation at break of control first insulating part, has improved the impact resistance performance of first insulating part, has improved first insulating part with the laminating degree of apron body, the insulating effect of first insulating part is better. The utility model also provides a battery, which comprises a shell and a cover plate assembly, wherein the battery core is arranged in the shell, the cover plate assembly is connected to the top end opening of the shell, and the cover plate assembly is the battery cover plate assembly. The battery of the utility model comprises the battery cover plate assembly, so that the battery cover plate assembly has the advantages of the battery cover plate assembly and is not repeated herein. Drawings In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. FIG. 1 is a schematic view of a prior art pole position; FIG. 2 is a schematic diagram of an explosion structure of an insulating member according to an embodiment of the present utility model; FIG. 3 is a schematic view of an installation structure of an insulating member according to an embodiment of the present utility model; FIG. 4 is a schematic cross-sectional view of the position A-A of FIG. 3; FIG. 5 is a schematic cross-sectional view of the B-B position of FIG. 3; FIG. 6 is a schemati