Search

CN-224232876-U - Battery cell, battery device and electricity utilization device

CN224232876UCN 224232876 UCN224232876 UCN 224232876UCN-224232876-U

Abstract

The application provides a battery cell, a battery device and an electricity utilization device. The battery cell includes a housing including a first wall including a first portion and a second portion, an electrode terminal, an electrode assembly, and an adapter, and a first recess is provided on an inner side of the first portion, the first recess being recessed with respect to an inner side surface of the second portion. The electrode terminal is disposed on the second portion, at least a portion of the electrode assembly is accommodated in the housing, and the electrode assembly includes an electrode body and a tab. The adapter comprises a first adapter part and a second adapter part which are connected with each other, at least part of the first adapter part is accommodated in the first concave part and is electrically connected with the electrode lug, and at least part of the second adapter part is arranged between the second part and the electrode main body and is electrically connected with the electrode terminal. The first adapting part comprises a thickened part, the minimum thickness of the thickened part is larger than the maximum thickness of the second adapting part, and at least part of the thickened part is accommodated in the first concave part. According to the application, the electrical performance of the battery cell can be improved.

Inventors

  • GAO LIANGJIE
  • ZHOU WENLIN
  • ZHENG YULIAN
  • HUANG SHOUJUN
  • PENG XINYING

Assignees

  • 宁德时代新能源科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250414

Claims (20)

  1. 1. A battery cell, comprising: a housing comprising a first wall comprising a first portion and a second portion, the inside of the first portion being provided with a first recess, the first recess being recessed relative to the inside surface of the second portion; an electrode terminal provided at the second portion; An electrode assembly at least partially housed within the housing, the electrode assembly including an electrode body and a tab leading from the electrode body; The adapter comprises a first adapter part and a second adapter part which are connected with each other, at least part of the first adapter part is accommodated in the first concave part and is electrically connected with the electrode lug, and at least part of the second adapter part is arranged between the second part and the electrode main body and is electrically connected with the electrode terminal; The first adapting part comprises a thickened part, the minimum thickness of the thickened part is larger than the maximum thickness of the second adapting part, and at least part of the thickened part is accommodated in the first concave part.
  2. 2. The battery cell of claim 1, wherein the first adapter portion further comprises a connecting portion connected to the tab, the thickened portion being connected between the connecting portion and the second adapter portion; the minimum thickness of the thickened portion is greater than the maximum thickness of the connecting portion.
  3. 3. The battery cell according to claim 1 or 2, wherein the first recess includes a bottom surface and a first side surface that is connected to an end of the bottom surface near the second portion and is inclined with respect to the bottom surface in a direction near the electrode assembly, and an orthographic projection of the tab is located in an orthographic projection of the bottom surface in the same plane perpendicular to a thickness direction of the first wall; At least part of the thickened portion is disposed between the first side face and the electrode main body in the thickness direction.
  4. 4. The battery cell of claim 3, wherein the second transition comprises a first surface facing the first wall and a second surface facing the electrode body; The thickened part comprises a first thickened part, the first thickened part comprises a third surface and a fourth surface which are oppositely arranged, the third surface is connected with the first surface, and the fourth surface is connected with the second surface; The third surface includes a first plane that is inclined with respect to the first surface in a direction approaching the first wall.
  5. 5. The battery cell of claim 4, wherein the first plane is disposed parallel to the first side.
  6. 6. The battery cell of claim 4, wherein the third surface further comprises a second plane and a third plane, the third plane connected between the second plane and the first surface, the second plane connected between the first plane and the third plane; The third plane is inclined with respect to the first surface in a direction approaching the first wall, the second plane intersects the first plane, and the second plane intersects the third plane.
  7. 7. The battery cell of claim 6, wherein the second plane is parallel to the first surface and/or the first plane is parallel to the third plane.
  8. 8. The battery cell of claim 6, wherein a first distance d1 between the second plane and the first surface in the thickness direction is 0.5mm to 10mm.
  9. 9. The battery cell of claim 8, wherein the first distance d1 is 1mm-6mm.
  10. 10. The battery cell of claim 6, wherein the first portion and the second portion are disposed along a first direction, the first direction being perpendicular to the thickness direction; In the first direction, the second distance d2 between the third plane and the first plane is 0.5mm-10mm.
  11. 11. The battery cell of claim 10, wherein the second distance d2 is 1mm-6mm.
  12. 12. The battery cell of claim 4, wherein the fourth surface comprises a fourth plane that is inclined relative to the second surface in a direction proximate the first wall.
  13. 13. The battery cell of claim 12, wherein the fourth plane is disposed parallel to the first plane.
  14. 14. The battery cell of claim 12, wherein a minimum spacing f between the first plane and the fourth plane is 1mm-10mm.
  15. 15. The battery cell of claim 14, wherein the minimum spacing f is 1.5mm-6mm.
  16. 16. The battery cell of claim 12, wherein the fourth surface includes a fifth plane and an arcuate surface, the fifth plane being connected between the arcuate surface and the second surface, the arcuate surface being connected between the fourth plane and the fifth plane, the arcuate surface being curved in a direction away from the third surface.
  17. 17. The battery cell of claim 16, wherein the fifth plane is flush with the second surface.
  18. 18. The battery cell of claim 16, wherein the first surface and the second surface are disposed in parallel; a first angle between the first plane and the first surface is greater than a second angle between the fourth plane and the second surface.
  19. 19. The battery cell as recited in claim 4, wherein the thickened portion further comprises a second thickened portion connected to an end of the first thickened portion remote from the second adapter portion, the first thickened portion being bent relative to the second thickened portion in a direction toward the electrode assembly.
  20. 20. The battery cell according to claim 19, wherein in the thickness direction, all of the first thickened portions are provided between the first side face and the electrode main body, and all of the second thickened portions are provided between the bottom face and the electrode main body.

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 electrical performance of a 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 electrical performance of the battery cell. In a first aspect, an embodiment of the present application provides a battery cell, including a housing, an electrode terminal, an electrode assembly, and an adapter, the housing including a first wall including a first portion and a second portion, an inner side of the first portion being provided with a first recess, the first recess being recessed with respect to an inner side surface of the second portion. The electrode terminal is disposed at the second portion, at least a portion of the electrode assembly is accommodated in the case, and the electrode assembly includes an electrode body and a tab led out from the electrode body. The adapter comprises a first adapter part and a second adapter part which are connected with each other, at least part of the first adapter part is accommodated in the first concave part and is electrically connected with the electrode lug, and at least part of the second adapter part is arranged between the second part and the electrode main body and is electrically connected with the electrode terminal. The first adapting part comprises a thickened part, the minimum thickness of the thickened part is larger than the maximum thickness of the second adapting part, and at least part of the thickened part is accommodated in the first concave part. According to the technical scheme, the first concave part is formed in the first wall, the available space between the first wall and the electrode assembly is increased, and the thickened part is formed in the adapter by utilizing the part of space corresponding to the first concave part, so that the overcurrent capacity of the adapter is improved, and the electric performance of the battery cell can be effectively improved. In some embodiments of the first aspect, the first switching portion further includes a connection portion connected to the tab, and the thickened portion is connected between the connection portion and the second switching portion, and a minimum thickness of the thickened portion is greater than a maximum thickness of the connection portion. The thickening portion is connected between connecting portion and second switching portion for the thickening portion can be located between first connecting region and the second connecting region, not only can reduce the interference of thickening portion to the utmost point ear, can also reduce the use of material when improving the overflow ability of adaptor, reduce cost. In some embodiments of the first aspect, the first recess includes a bottom surface and a first side surface connected to an end of the bottom surface adjacent to the second portion and inclined with respect to the bottom surface in a direction adjacent to the electrode assembly, and the orthographic projection of the tab is located within the orthographic projection of the bottom surface in the same plane perpendicular to the thickness direction of the first wall. At least part of the thickened portion is disposed between the first side face and the electrode main body in the thickness direction. Through setting up the at least part of thickening portion between first side and electrode main part, the first side of slope setting can play certain guide effect, reduces the assembly degree of difficulty between first wall and the adaptor. In some embodiments of the first aspect, the second transition includes a first surface facing the first wall and a second surface facing the electrode body. The thickening portion comprises a first thickening portion, the first thickening portion comprises a third surface and a fourth surface which are oppositely arranged, the third surface is connected to the first surface, and the fourth surface is connected to the second surface. The third surface includes a first plane that is inclined with respect to the first surface in a direction approaching the first wall. Through setting up the first plane of slope, can make the thickening portion utilize the space that the position department of first concave part in first side formed better, improve the inside space