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CN-224204193-U - Cover plate structure, battery pack and electric equipment

CN224204193UCN 224204193 UCN224204193 UCN 224204193UCN-224204193-U

Abstract

The application relates to the technical field of batteries, and provides a cover plate structure, a battery pack and electric equipment, wherein the cover plate structure comprises a cover plate main body, a connecting terminal and an insulating structure, the cover plate main body is provided with a first through hole which is positioned at one side of the cover plate main body, which is opposite to a pole core, the connecting terminal is provided with a supporting platform, the connecting terminal comprises a second through hole which penetrates through the supporting platform, and the second through hole is communicated with the first through hole, the first through hole and the second through hole are suitable for the tab to pass through, so that the tab is connected to one side of the supporting platform, which is opposite to the pole core, the insulation structure is arranged between the cover plate main body and the connecting terminal, insulation is formed between the cover plate main body and the connecting terminal, the insulation structure also covers the inner wall of the first through hole, and at least part of the insulation structure is injection-molded on the cover plate main body. The embodiment of the application can improve the safety performance of the battery and the capacity of the battery.

Inventors

  • CHEN GUANGAN
  • DUAN PINGAN
  • Lin Naiquan
  • WANG XINYUE
  • CHEN CHONG

Assignees

  • 比亚迪股份有限公司

Dates

Publication Date
20260505
Application Date
20250321

Claims (20)

  1. 1. A cover structure (30), characterized by comprising: a cover main body (100), the cover main body (100) being formed with a first through hole (101); -a connection terminal (200) located at a side of the cover body (100) facing away from the pole core (20), the connection terminal (200) being formed with a support platform (202), the connection terminal (200) comprising a second through hole (201) penetrating the support platform (202), and the second through hole (201) being in communication with the first through hole (101), the first through hole (101) and the second through hole (201) being adapted for a tab (21) to pass through so that the tab (21) is connected to a side of the support platform (202) facing away from the pole core (20); And an insulation structure (300), the insulation structure (300) is arranged between the cover plate main body (100) and the connection terminal (200) so as to form insulation between the cover plate main body (100) and the connection terminal (200), the insulation structure (300) also covers the inner wall of the first through hole (101), and at least part of the insulation structure (300) is injection-molded on the cover plate main body (100).
  2. 2. The cover structure (30) of claim 1, wherein the support platform (202) comprises a support plane (202 a), the support plane (202 a) being adapted to be fitted and welded with the tab (21).
  3. 3. The cover plate structure (30) according to claim 1, wherein the connection terminal (200) comprises a base (213), the base (213) is provided with the second through hole (201), and at least part of the structure of the base (213) forms the support platform (202).
  4. 4. A cover structure (30) according to claim 3, wherein the connection terminal (200) further comprises a support portion (214), the support portion (214) protruding from the seat body (213), and a portion of the seat body (213) located inside the support portion (214) forms the support platform (202).
  5. 5. The cover structure (30) of claim 4, wherein said connection terminal (200) further comprises: And the sealing cover (220) is arranged on the supporting part (214) and is covered above the seat body (213), or the sealing cover (220) is arranged in a space defined by the supporting part (214) and the seat body (213).
  6. 6. The cover plate structure (30) according to claim 5, wherein a first step (210 a) is formed on the support portion (214), and the cover (220) is disposed on the first step (210 a).
  7. 7. The cover structure (30) of claim 5, wherein the cover (220) comprises a metal composite.
  8. 8. The cover plate structure (30) of claim 7, wherein the metal composite comprises a copper aluminum composite block.
  9. 9. The cover structure (30) of any one of claims 1 to 8, wherein the insulating structure (300) comprises: And a plurality of insulating layers (320), wherein the insulating layers (320) are sandwiched between the connection terminals (200) and the cover plate main body (100).
  10. 10. The cover structure (30) of claim 1, wherein the insulating structure (300) comprises: a first insulating member (330), the first insulating member (330) covering at least a periphery of the first through hole (101); And a second insulating member (340), the second insulating member (340) being abutted against the first insulating member (330) and located between the connection terminal (200) and the cap main body (100), Wherein the first insulating element (330) and/or the second insulating element (340) are injection-molded onto the cover body (100).
  11. 11. The cover plate structure (30) according to claim 10, wherein the cover plate body (100) comprises a first surface (104) facing the connection terminal (200), a second surface (105) facing away from the connection terminal (200), and a third surface (106) connected between the first surface (104) and the second surface (105), the first insulator (330) comprises a first bonding portion (331) bonded to the first surface (104), a second bonding portion (332) bonded to the second surface (105), and a third bonding portion (333) bonded to the third surface (106), and the second insulator (340) is abutted to the first bonding portion (331).
  12. 12. The cover plate structure (30) according to claim 11, wherein a second step (107) is formed on a side of the cover plate main body (100) away from the connection terminal (200), the first insulating member (330) further includes a fourth attaching portion (334) attached to the second step (107), and the fourth attaching portion (334) is connected to the second attaching portion (332).
  13. 13. The cover plate structure (30) according to claim 11, wherein the connection terminal (200) further comprises a protruding portion (215) protruding away from the second through hole (201), and the second insulating member (340) is bent and covers an outer side wall of the protruding portion (215).
  14. 14. The cover structure (30) of claim 11, wherein the cover structure (30) further comprises: -a connection member (700), the connection member (700) being connected between the second insulating member (340) and the connection terminal (200).
  15. 15. The cover plate structure (30) of claim 14, wherein the second insulating member (340) is provided with a clamping groove (341), and at least a portion of the connecting member (700) is disposed in the clamping groove (341).
  16. 16. The cover plate structure (30) according to claim 14, wherein the second insulating member (340) is an insulating ceramic member, the connecting member (700) is welded and fixed between the second insulating member (340) and the connecting terminal (200), and the second insulating member (340) is welded and fixed with the cover plate main body (100).
  17. 17. The cover plate structure (30) according to any one of claims 11 to 16, wherein a recessed area (108) is formed on the cover plate body (100), and the first fitting portion (331) and at least part of the second insulating member (340) are disposed within the recessed area (108).
  18. 18. The cover structure (30) according to any one of claims 1 to 8, wherein an outer edge of the cover body (100) is formed with an edge step (102) for forming a connection with a housing (10) of a battery.
  19. 19. The cover plate structure (30) of any one of claims 10-16, wherein the first insulator (330) is an insulating injection molded part.
  20. 20. The cover plate structure (30) according to any one of claims 10-13, wherein the second insulating member (340) is an insulating ceramic member, the second insulating member (340) is welded to the connection terminal (200), and the second insulating member (340) is welded to the cover plate main body (100).

Description

Cover plate structure, battery pack and electric equipment Technical Field The application relates to the technical field of batteries, in particular to a cover plate structure, a battery pack and electric equipment. Background The cover plate structure of the lithium ion battery can form a positive electrode end or a negative electrode end on the cover plate structure after being welded and fixed with the pole core, and the positive electrode end or the negative electrode end can be connected into electric equipment so as to supply power to the electric equipment. At present, in the related art, a welding procedure between a cover plate structure and a pole core needs to be completed at one side of the cover plate structure facing the pole core, a welding position is located at the position of the positive pole core, welding slag formed in the welding process easily enters the battery, short circuit of the battery is easily caused, and the risk is high. Disclosure of utility model The application provides a cover plate structure, a battery pack and electric equipment, which can improve the safety performance of the battery and the capacity of the battery. A first aspect of the present application provides a cover plate structure, comprising: a cover plate main body, wherein the cover plate main body is provided with a plurality of grooves, the cover plate main body is provided with a first through hole; The connecting terminal is positioned on one side of the cover plate main body, which is opposite to the pole core, and is provided with a supporting platform, the connecting terminal comprises a second through hole penetrating through the supporting platform, the second through hole is communicated with the first through hole, and the first through hole and the second through hole are suitable for the pole lug to pass through so that the pole lug is connected to one side of the supporting platform, which is opposite to the pole core; And the insulation structure is arranged between the cover plate main body and the connecting terminal so as to form insulation between the cover plate main body and the connecting terminal, and also covers the inner wall of the first through hole, wherein at least part of the insulation structure is injection-molded on the cover plate main body. According to the cover plate structure of the first aspect of the application, the cover plate structure can be connected to the end part of the shell, the cover plate structure is based on the design of the first through hole on the cover plate main body and the design of the second through hole on the connecting terminal, so that the tab can reach one side of the supporting platform, which is far away from the pole core, after passing through the first through hole and the second through hole, so that the tab in the battery can extend out of the shell and be connected to one side of the supporting platform, which is far away from the pole core, the structure form enables the connection between the tab and the connecting terminal to be carried out outside the shell, the problem of short circuit caused by the entering of welding slag into the battery can be avoided, the safety performance of the battery can be improved, meanwhile, the internal space occupied by the connecting structure can be saved, more arrangement space is provided for the pole core, and the capacity of the battery is improved. In addition, the insulating structure formed between the cover plate main body and the connecting terminal can form insulation between the cover plate main body and the connecting terminal, so that safety is guaranteed, at least part of the insulating structure can be injection molded on the cover plate main body, the connecting strength can be improved, and the manufacturing process is simplified. In one possible implementation, the support platform includes a support plane adapted to fit and weld with the tab. In one possible implementation manner, the connection terminal includes a base body, the base body is provided with the second through hole, and at least part of the structure of the base body forms the supporting platform. In one possible implementation, the connection terminal further includes a supporting portion protruding from the base, and a portion of the base located inside the supporting portion forms the supporting platform. In one possible implementation, the connection terminal further includes: The sealing cover is arranged on the supporting part and is covered above the seat body, or the sealing cover is arranged in a space defined by the supporting part and the seat body together. In one possible implementation, the support portion has a first step formed thereon, and the cover is disposed on the first step. In one possible implementation, the cover comprises a metal composite. In one possible implementation, the metal composite comprises a copper aluminum composite block. In one possible implementation, the insulating