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CN-224204304-U - Pole core, battery assembly and electric equipment

CN224204304UCN 224204304 UCN224204304 UCN 224204304UCN-224204304-U

Abstract

The utility model discloses a pole core, a battery component and electric equipment, which relate to the technical field of batteries and are characterized in that the pole core comprises a pole ear, the pole ear comprises a pole ear body and a first welding mark, the pole ear body is connected with the first welding mark, the first welding mark is arranged on the outer surface of the pole ear body, the first welding mark is formed by resistance welding and is used for enabling the pole ear to form an integrated structure, the problems of traditional welding air holes and scraps are solved, the pole ear can be further provided with a metal protection sheet for reinforcing welding mark protection, and a cover plate is connected with the pole core through a second welding mark of laser welding.

Inventors

  • ZHANG HUI
  • LIANG KEPENG
  • PI JINGWU
  • ZHANG YONG
  • YU HAO

Assignees

  • 比亚迪股份有限公司

Dates

Publication Date
20260505
Application Date
20250430

Claims (12)

  1. 1. The utility model provides a utmost point core (1), its characterized in that, utmost point core (1) includes utmost point ear (11), utmost point ear (11) are including continuous utmost point ear body (111) and first welding seal (112), first welding seal (112) set up in the surface of utmost point ear body (111), first welding seal (112) are by resistance welding formation for make utmost point ear (11) form integrated structure.
  2. 2. The pole core (1) according to claim 1, characterized in that the first welding marks (112) are oppositely arranged at the outer surface in the thickness direction of the pole tab (11).
  3. 3. The pole core (1) according to claim 1, characterized in that the projected area of the first solder mark (112) in the thickness direction of the pole tab (11) is smaller than the projected area of the pole tab body (111) in the thickness direction of the pole tab (11).
  4. 4. The pole core (1) according to claim 1, characterized in that the pole tab (11) further comprises a metal protection sheet (113), the metal protection sheet (113) being arranged on the outer surface of the first weld (112).
  5. 5. The pole core (1) according to claim 4, characterized in that the projection of the metal protection sheet (113) in the thickness direction of the pole tab (11) covers the projection of the first solder mark (112) in the thickness direction of the pole tab (11).
  6. 6. The pole core (1) according to claim 4, wherein the metal protection sheet (113) is disposed opposite to the outer surface in the thickness direction of the tab (11).
  7. 7. The pole core (1) according to claim 4, characterized in that the material of the metal protection sheet (113) is the same as the material of the tab body (111).
  8. 8. The pole core (1) according to claim 4, characterized in that the metal protection sheet (113) is welded with the tab body (111) and the first weld mark (112) at the same time.
  9. 9. The pole core (1) according to claim 4, characterized in that the welding pulse of the metal protection sheet (113) welded with the pole tab body (111) and the first welding mark (112) at the same time is formed by resistance welding.
  10. 10. A battery comprising a pole core (1) and a cover plate (2) according to any one of claims 1-9, the cover plate (2) further comprising a cover plate body (21) and a second weld (22), the second weld (22) being formed by laser welding, the second weld (22) being for connecting the pole core (1) and the cover plate (2).
  11. 11. A battery assembly comprising the battery of claim 10.
  12. 12. A powered device comprising the battery assembly of claim 11, or the battery of claim 10.

Description

Pole core, battery assembly and electric equipment Technical Field The utility model relates to the technical field of batteries, in particular to a pole core, a battery assembly and electric equipment. Background In the prior art, the multilayer tab foil in the pole core needs to be welded into a whole so as to be welded with the cover plate, however, the existing welding mode is easy to form air holes in the welded tab, so that the density of the tab is insufficient, the conductivity of the pole core is affected, and meanwhile, metal scraps are easy to splash in the implementation process in some welding modes, so that the risk of certain short circuit of the pole core is caused. Disclosure of utility model The technical problem to be solved by the utility model is that a plurality of layers of tab foil materials in the pole core are required to be welded into a whole so as to be welded with the cover plate, however, the existing welding mode is easy to form air holes in the welded tab so as to cause insufficient density of the tab, thereby influencing the conductive performance of the pole core, and meanwhile, some welding modes are easy to cause metal scraps to splash in the implementation process, so that the risk of causing short circuit of the pole core is caused. In order to solve the technical problem, in one aspect, a pole core comprises a pole ear, the pole ear includes continuous pole ear body and first welding seal, first welding seal set up in the surface of pole ear body, first welding seal is by resistance welding formation for make the pole ear forms integrated structure. As an optional technical scheme of the utility model, the first welding marks are oppositely arranged on the outer surface along the thickness direction of the tab. As an optional technical scheme of the utility model, the projection area of the first welding mark in the thickness direction of the tab is smaller than the projection area of the tab body in the thickness direction of the tab. As an optional technical scheme of the utility model, the tab further comprises a metal protection sheet, and the metal protection sheet is arranged on the outer surface of the first welding mark. As an optional technical scheme of the utility model, the projection of the metal protection sheet in the thickness direction of the tab covers the projection of the first solder mark in the thickness direction of the tab. As an optional technical scheme of the utility model, the metal protection sheets are oppositely arranged on the outer surface along the thickness direction of the tab. As an optional technical scheme of the utility model, the material of the metal protection sheet is the same as that of the tab body. As an optional technical scheme of the utility model, the metal protection sheet is simultaneously connected with the tab body and the first welding mark in a welding way. As an optional technical scheme of the utility model, the welding pulse of the metal protection sheet, which is welded with the tab body and the first welding mark at the same time, is formed by resistance welding. On the other hand, as an optional technical scheme of the utility model, the disclosure also provides a battery, which comprises the pole core and the cover plate, wherein the cover plate further comprises a cover plate body and a second welding mark, the second welding mark is formed by laser welding, and the second welding mark is used for connecting the pole core and the cover plate. On the other hand, as an optional technical scheme of the utility model, the disclosure also provides a battery assembly, which comprises the battery. On the other hand, as an optional technical scheme of the utility model, the disclosure also provides electric equipment, which is characterized by comprising the battery assembly or the battery. The pole core has the beneficial effects that the pole core comprises the pole lug, the pole lug comprises the pole lug body and the first welding mark, the first welding mark is arranged on the outer surface of the pole lug body, and the first welding mark is formed by resistance welding and is used for enabling the pole lug to form an integrated structure. The multilayer foil of the tab is welded together in a resistance welding mode, so that the tab forms a stable and smooth integrated structure, and compared with the traditional welding marks left by laser welding and ultrasonic welding, the density and the conductivity of the tab can be improved, the risk of short circuit of the pole core can be reduced, and the structural stability and the process adaptability can be enhanced. Drawings In order to more clearly illustrate the embodiments of the present disclosure or the prior art, the drawings that are required in the detailed description or the prior art will be briefly described, it will be apparent that the drawings in the following description are some embodiments of the present disclosure, and other drawings may be