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CN-122000640-A - Tab connection structure, pole core assembly, battery pack and electric equipment

CN122000640ACN 122000640 ACN122000640 ACN 122000640ACN-122000640-A

Abstract

The invention discloses a tab connection structure, a tab core assembly, a battery pack and electric equipment. The lugs of the plurality of pole cores are suitable for being arranged between the first connecting piece and the second connecting piece, and the lugs of the plurality of pole cores are electrically connected between the first connecting piece and the second connecting piece. The lug connection structure enables the lugs of the plurality of pole cores to be in direct contact connection, and the first connecting piece and the second connecting piece are in electric connection, so that the contact internal resistance can be reduced, the heat loss of electric connection between the lugs of the plurality of pole cores is reduced, and the stability and reliability of connection between the lugs of the plurality of pole cores are improved. And the tab connection structure is simple, the volume is smaller, and the utilization of the internal space of the battery provided with the tab connection structure can be increased, so that more electrolytes can be filled conveniently, and the capacitance is improved.

Inventors

  • ZHOU YU
  • XIONG CHAOYANG
  • TAN JING
  • JIANG ZHIMIN
  • DONG LIYUAN

Assignees

  • 比亚迪股份有限公司

Dates

Publication Date
20260508
Application Date
20241105

Claims (20)

  1. 1. A tab connection structure (32), characterized by comprising: a first connector (10); and a second connecting piece (11), wherein the lugs (40) of the plurality of pole cores (31) are suitable for being arranged between the first connecting piece (10) and the second connecting piece (11), and the lugs (40) of the plurality of pole cores (31) are electrically connected between the first connecting piece (10) and the second connecting piece (11).
  2. 2. The tab connection (32) according to claim 1, wherein the first connection (10) and the second connection (11) define a receiving space therebetween, the receiving space having at least one opening through which the tab (40) is adapted to extend into the receiving space.
  3. 3. The tab connection structure (32) according to claim 2, wherein the number of the openings is two, the two openings are respectively located at two opposite sides of the accommodating space, and the tabs (40) of the plurality of the tab cores (31) respectively extend into the accommodating space through the two openings.
  4. 4. The tab connection structure (32) according to claim 1, wherein the first connection member (10) and the second connection member (11) are disposed in a thickness direction of the tab (40).
  5. 5. The tab connection structure (32) according to claim 1, wherein the tabs (40) of a plurality of the tab cores (31) are stacked in a thickness direction of the tab (40).
  6. 6. The tab connection structure (32) according to claim 5, wherein at least one of the first and second connection members (10, 11) is provided with at least one positioning member, at least the other of the first and second connection members (10, 11) is provided with at least one positioning hole, and the positioning member is adapted to be fitted with the positioning hole through the tabs (40) of a plurality of the tab cores (31).
  7. 7. The tab connection structure (32) of claim 1, further comprising: At least one clamping structure (20), the first connecting piece (10) and the second connecting piece (11) are connected through the clamping structure (20).
  8. 8. The tab connection structure (32) according to claim 7, wherein the snap-fit structure (20) comprises a snap-fit groove (21) and a snap-fit (22), One of the first connecting piece (10) and the second connecting piece (11) is provided with the buckle (22), the other of the first connecting piece (10) and the second connecting piece (11) is provided with the clamping groove (21), and the buckle (22) is matched with the clamping groove (21).
  9. 9. The tab connection structure (32) according to claim 7, wherein the number of the clamping structures (20) is plural, and the plurality of the clamping structures (20) are respectively disposed at the ends of the first connection member (10) and the second connection member (11).
  10. 10. Tab connection (32) according to any of claims 1-9, wherein the first connection (10) and the second connection (11) are detachably connected.
  11. 11. A pole piece assembly (30), comprising: the pole comprises a pole core (31), wherein a pole lug (40) is arranged on the pole core (31); The tab connection structure (32), wherein the tab connection structure (32) is the tab connection structure (32) according to any one of claims 1 to 10, and the tab (40) is arranged between the first connecting piece (10) and the second connecting piece (11) of the tab connection structure (32).
  12. 12. The pole core assembly (30) according to claim 11, wherein the pole core (31) is a plurality of the pole cores (31), the plurality of the pole cores (31) comprising: A first pole piece (311); -a second pole piece (312), the tab (40) of the end of the first pole piece (311) and the second pole piece (312) adjacent to each other being arranged between the first connection piece (10) and the second connection piece (11).
  13. 13. The pole core assembly (30) according to claim 12, wherein the tabs (40) of one end of the first pole core (311) and the second pole core (312) adjacent to each other are stacked in a thickness direction of the tabs (40).
  14. 14. The pole core assembly (30) of claim 12, wherein the polarities of the tabs (40) at the ends of the first pole core (311) and the second pole core (312) adjacent to each other are opposite.
  15. 15. The pole core assembly (30) according to claim 12, wherein the first pole core (311) and the second pole core (312) are arranged in a length direction or a thickness direction of the pole core (31).
  16. 16. The pole core assembly (30) of claim 11, wherein the tab (40) has a through hole formed therein that mates with a locating feature of the tab connection structure (32).
  17. 17. A battery (100), characterized by comprising: -a pole core assembly (30), the pole core assembly (30) being a pole core assembly (30) according to any one of claims 11-16; the pole piece assembly comprises a shell (50), and a pole piece (31) and a pole lug connecting structure (32) of the pole piece assembly (30) are arranged in the shell (50).
  18. 18. The battery (100) of claim 17, wherein the housing (50) comprises: An outer resistance layer (51); -a heat sealing layer (52), said heat sealing layer (52) being connected to a side of said outer resistive layer (51) adjacent to said pole core (31).
  19. 19. The battery (100) of claim 18, wherein the housing (50) further comprises: -a barrier layer (53), said barrier layer (53) being connected between said outer barrier layer (51) and said heat seal layer (52).
  20. 20. The battery (100) of claim 19, wherein the barrier layer (53) is a fabric-type gel composite thermal barrier layer.

Description

Tab connection structure, pole core assembly, battery pack and electric equipment Technical Field The invention relates to the technical field of batteries, in particular to a pole lug connection structure, a pole core assembly, a battery pack and electric equipment. Background In the prior art, the outer drain lugs of the two soft package battery cells are welded in series through the connecting aluminum row, the connecting form needs to cut and segment the aluminum plastic film of each soft package battery cell, each battery cell is independently packaged, the sealing glue is used for sealing, and then the two battery cells are welded after being assembled and positioned, so that the process is complex, and the production yield is low. Disclosure of Invention The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide a tab connection structure, which can simplify the production process and improve the safety of the battery pack. A second object of the present invention is to provide a pole core assembly, which includes a pole core and the tab connection structure described in the embodiment of the first aspect. A third object of the present invention is to provide a battery including the pole core assembly and the case described in the embodiment of the second aspect. A fourth object of the present invention is to provide a battery pack including the battery described in the embodiment of the third aspect. A fifth object of the present invention is to provide a powered device, including the battery described in the embodiment of the third aspect, or the battery pack described in the embodiment of the fourth aspect. According to the first aspect, the tab connection structure comprises a first connection piece and a second connection piece, the tabs of the plurality of pole cores are suitable for being arranged between the first connection piece and the second connection piece, and the tabs of the plurality of pole cores are electrically connected between the first connection piece and the second connection piece. According to the tab connection structure provided by the embodiment of the invention, the tabs of the plurality of pole cores are connected in a direct contact manner through the tab connection structure, and are electrically connected through the contact of the first connecting piece and the second connecting piece, so that the contact internal resistance can be reduced, the heat loss of the electrical connection between the tabs of the plurality of pole cores is reduced, and the stability and the reliability of the connection between the tabs of the plurality of pole cores are improved. And the lug connection structure is simple in structure and small in volume, and can increase the utilization of the internal space of the battery provided with the lug connection structure, so that more electrolytes can be filled conveniently, and the capacitance can be improved. In some embodiments, the first connector and the second connector define a receiving space therebetween, the receiving space having at least one opening, the tab being adapted to extend into the receiving space through the opening. In some embodiments, the number of the openings is two, the two openings are respectively located at two opposite sides of the accommodating space, and the lugs of the plurality of pole cores respectively penetrate through the two openings and extend into the accommodating space. In some embodiments, the first and second connection members are disposed along a thickness direction of the tab. In some embodiments, the tabs of a plurality of the tabs are stacked in a thickness direction of the tabs. In some embodiments, at least one of the first and second connection members is provided with at least one positioning member, at least another one of the first and second connection members is provided with at least one positioning hole, and the positioning member is adapted to pass through the tabs of a plurality of the pole cores to be matched with the positioning holes. In some embodiments, the tab connection structure further comprises at least one clamping structure, and the first connection piece and the second connection piece are connected through the clamping structure. In some embodiments, the clamping structure comprises a clamping groove and a clamping buckle which are matched with each other, one of the first connecting piece and the second connecting piece is provided with the clamping buckle, and the other of the first connecting piece and the second connecting piece is provided with the clamping groove, and the clamping buckle is matched with the clamping groove. In some embodiments, the plurality of the clamping structures are respectively arranged at the end parts of the first connecting piece and the second connecting piece. In some embodiments, the first connector and the second connector are r