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CN-224232707-U - Battery cell, battery device and electricity utilization device

CN224232707UCN 224232707 UCN224232707 UCN 224232707UCN-224232707-U

Abstract

The application provides a battery cell, a battery device and an electricity utilization device. The battery cell includes shell, electrode assembly, electrode terminal and adapting unit, and the shell has first wall, and electrode assembly holds in the shell, and electrode assembly includes the utmost point ear, and electrode terminal sets up in first wall. The switching part comprises a main body part and a heat dissipation part, wherein the main body part is electrically connected with the electrode lug and the electrode terminal, and the heat dissipation part is connected with the end part of the main body part and extends along the direction far away from the main body part. According to the application, the reliability and performance of the battery cell can be effectively improved.

Inventors

  • ZHANG GANGHONG
  • ZHU LINLIN
  • ZHOU WENLIN
  • ZHENG DONGLAI
  • WANG TIANSHENG

Assignees

  • 宁德时代新能源科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250331

Claims (20)

  1. 1. A battery cell, comprising: a housing having a first wall; An electrode assembly accommodated in the case, the electrode assembly including a tab; an electrode terminal provided on the first wall; the switching part comprises a main body part and a heat dissipation part, wherein the main body part is electrically connected with the electrode lug and the electrode terminal, and the heat dissipation part is connected with the end part of the main body part and extends along the direction away from the main body part.
  2. 2. The battery cell of claim 1, wherein the body portion includes a first connection portion and a second connection portion connected, the first connection portion being electrically connected to the tab, the second connection portion being electrically connected to the electrode terminal; The heat dissipation part is connected to one end of the second connection part far away from the first connection part.
  3. 3. The battery cell of claim 1, wherein the heat dissipation portion has a thermal conductivity that is greater than a thermal conductivity of the body portion.
  4. 4. The battery cell of claim 1, wherein the heat sink includes a plurality of first ribs, the plurality of first ribs being spaced apart from one another.
  5. 5. The battery cell of claim 4, wherein the first rib is configured in a wave-like or saw-tooth-like configuration.
  6. 6. The battery cell as recited in claim 4, wherein the heat sink further comprises a plurality of second ribs, the plurality of second ribs are disposed at intervals, and the plurality of second ribs and the plurality of first ribs are intersected with each other to form a grid structure.
  7. 7. The battery cell of claim 1, wherein the electrode assembly further comprises an electrode body, the tab being connected to an end of the electrode body facing the first wall; The transfer component is positioned between the first wall and the electrode assembly, the heat dissipation part is connected to the end part of the main body part along a first direction, and the first direction intersects with the thickness direction of the first wall.
  8. 8. The battery cell according to claim 7, wherein the main body portion includes a first connection portion and a second connection portion connected to each other, the first connection portion and the second connection portion being disposed along the first direction, the first connection portion being electrically connected to the tab, the second connection portion being electrically connected to the electrode terminal; The heat dissipation part is connected to one end of the second connection part far away from the first connection part.
  9. 9. The battery cell of claim 8, wherein the first wall includes a first portion and a second portion, the second portion being closer to the electrode assembly than the first portion in the thickness direction, the electrode terminal being disposed at the second portion; The main body part further comprises a bending part, the bending part is connected with the first connecting part and is close to the electrode assembly in the thickness direction to bend, and the second connecting part is connected with one end, far away from the first connecting part, of the bending part.
  10. 10. The battery cell according to claim 9, wherein a side of the first wall facing the electrode assembly is formed with a recess, the recess being disposed opposite to the first portion in the thickness direction; At least part of the tab is accommodated in the recess, and at least part of the first connecting portion is accommodated in the recess.
  11. 11. The battery cell of claim 10, wherein a projection of the electrode terminal along the first direction at least partially overlaps a projection of the tab along the first direction.
  12. 12. The battery cell of claim 11, wherein the second portion is located in a middle region of the first wall along the first direction.
  13. 13. The battery cell according to claim 7, wherein the heat dissipation portion includes a plurality of first ribs, the plurality of first ribs being disposed at intervals along a second direction, the first direction, the second direction, and a thickness direction of the first wall being perpendicular to each other.
  14. 14. The battery cell according to claim 1, wherein a groove is provided in the main body portion, the position of the groove corresponding to the position of the electrode terminal, the groove being recessed with respect to a side surface of the main body portion facing away from the electrode terminal; The portion of the body portion corresponding to the groove is welded to the electrode terminal and forms a weld, which is accommodated in the groove.
  15. 15. The battery cell according to claim 14, wherein a dimension of the heat dissipation portion in a thickness direction of the first wall is greater than or equal to a dimension of a portion of the main body portion corresponding to the groove in the thickness direction.
  16. 16. The battery cell of claim 1, wherein the body portion and the heat sink portion are of an integrally formed construction.
  17. 17. The battery cell of any one of claims 1-16, wherein the housing comprises an end cap and a shell, the shell having an opening, the end cap covering the opening; the end cap is configured as the first wall.
  18. 18. A battery device comprising a plurality of cells according to any one of claims 1-17.
  19. 19. The battery device according to claim 18, further comprising a heat exchanging member provided outside the battery cell and opposite to the heat radiating portion.
  20. 20. An electrical device comprising a battery cell according to any one of claims 1 to 17 or a battery device according to claim 18 or 19 for storing or providing electrical energy.

Description

Battery cell, battery device and electricity utilization device Technical Field The application relates to the technical field of batteries, in particular to a battery cell, a battery device and an electricity utilization device. Background With the development of new energy technology, the battery is increasingly widely applied, for example, to mobile phones, notebook computers, battery cars, electric automobiles, electric airplanes, electric ships, electric toy automobiles, electric toy ships, electric toy airplanes, electric tools and the like. In the development of battery technology, how to improve the reliability and performance of the battery cell is a continuous direction in battery technology. Disclosure of utility model In view of the above, the present application provides a battery cell, a battery device, and an electric device, which can effectively improve the reliability and performance of the battery cell. In a first aspect, an embodiment of the present application provides a battery cell, including a housing having a first wall, an electrode assembly received in the housing, the electrode assembly including a tab, an electrode terminal, and an adapter member, the electrode terminal being disposed on the first wall. The switching part comprises a main body part and a heat dissipation part, wherein the main body part is electrically connected with the electrode lug and the electrode terminal, and the heat dissipation part is connected with the end part of the main body part and extends along the direction far away from the main body part. According to the technical scheme, the radiating part is connected to the end part of the main body part and extends along the direction away from the main body part, so that a larger layout space is provided for the radiating part, the contact area between the radiating part and air is increased, the integral radiating capacity of the switching part can be improved, and the reliability and performance of the battery cell can be effectively improved. In some embodiments of the first aspect, the body portion includes a first connection portion and a second connection portion connected to each other, the first connection portion being electrically connected to the tab, the second connection portion being electrically connected to the electrode terminal. The heat dissipation part is connected to one end of the second connection part far away from the first connection part. The technical scheme not only improves the heat radiation capability of the switching part, but also can keep full contact between the tab and the switching part, thereby optimizing the overcurrent capability between the tab and the first connecting part and improving the performance of the battery monomer. In some embodiments of the first aspect, the heat dissipation performance of the heat dissipation portion can be further improved by having the heat dissipation portion have a higher thermal conductivity than the thermal conductivity of the main body portion. In some embodiments of the first aspect, the heat dissipating portion includes a plurality of first ribs, and the plurality of first ribs are disposed at intervals. According to the technical scheme, the contact area between the heat dissipation part and the air can be further increased, so that the overall heat dissipation capacity of the adapting part is further improved. In some embodiments of the first aspect, the first ribs are configured in a wave-like or saw-tooth like configuration. According to the technical scheme, the contact area between the heat dissipation part and the air can be further increased, so that the overall heat dissipation capacity of the adapting part is further improved. In some embodiments of the first aspect, the heat dissipating portion further includes a plurality of second ribs, the plurality of second ribs are disposed at intervals, and the plurality of second ribs and the plurality of first ribs intersect each other to form a grid structure. According to the technical scheme, the grid structure is formed by the plurality of second ribs and the plurality of first ribs which are mutually intersected, so that the heat radiating area of the heat radiating part can be further increased, the whole heat radiating capacity of the switching part can be further improved, the structural strength of the heat radiating part can be further improved, and the reliability of the switching part can be improved. In some embodiments of the first aspect, the electrode assembly further comprises an electrode body, the tab being connected to an end of the electrode body facing the first wall. The switching part is positioned between the first wall and the electrode assembly, the heat dissipation part is connected to the end part of the main body part along the first direction, and the first direction is intersected with the thickness direction of the first wall. The technical proposal has a larger layout area along the fir