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CN-224232742-U - Battery monomer, battery device and electric equipment

CN224232742UCN 224232742 UCN224232742 UCN 224232742UCN-224232742-U

Abstract

The embodiment of the application provides a battery monomer, a battery device and electric equipment, and relates to the technical field of batteries. The battery cell comprises a shell, an electrode assembly and a support piece, wherein the electrode assembly is installed in the shell and is provided with two first surfaces opposite to each other along a first direction, the support piece is positioned between the electrode assembly and the shell, at least one support piece is installed on at least one of the two first surfaces, and at least one side of the support piece protrudes out of the electrode assembly along a second direction and/or a third direction. According to the application, the electrode assembly is separated from the shell through the support piece, so that when the shell is subjected to vibration impact or the electrode assembly is expanded, the part of the support piece protruding out of the electrode assembly can be propped against the shell, and the first surface is not in direct contact with the shell, thereby effectively protecting the electrode assembly, reducing the risk of damage to the electrode assembly and prolonging the service life of the electrode assembly.

Inventors

  • ZHANG GANGHONG
  • ZHU LINLIN
  • LUO JIAHONG
  • ZHOU YINJIE
  • ZHENG DONGLAI

Assignees

  • 宁德时代新能源科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250320

Claims (20)

  1. 1. A battery cell, comprising: A housing; An electrode assembly mounted in the case and having two first surfaces opposite in a first direction intersecting a longitudinal direction of the electrode assembly, and And the support piece is positioned between the electrode assembly and the shell, at least one support piece is arranged on at least one of the two first surfaces, the support piece protrudes out of the electrode assembly along at least one side of a second direction and/or a third direction, the third direction is the length direction of the electrode assembly, and the first direction, the second direction and the third direction are intersected in pairs.
  2. 2. The battery cell of claim 1, wherein the first surface is a surface of the electrode assembly that has a largest area.
  3. 3. The battery cell of claim 2, wherein the support on the first surface covers all areas of the first surface.
  4. 4. The battery cell according to claim 3, wherein a difference in size of the support member and the electrode assembly in the second direction is greater than 0mm and equal to or less than 16mm.
  5. 5. The battery cell according to claim 4, wherein a difference between a size of the support and a size of the electrode assembly in the second direction is 2mm or more and 6mm or less.
  6. 6. The battery cell according to claim 3, wherein a difference in size of the support member and the electrode assembly in the third direction is greater than 0mm and 10mm or less.
  7. 7. The battery cell according to claim 6, wherein a difference between a size of the support and a size of the electrode assembly in the third direction is 1mm or more and 3mm or less.
  8. 8. The battery cell according to any one of claims 1 to 7, wherein the support member has a thickness in the first direction, and a portion of the support member protruding from the electrode assembly has a non-uniform thickness structure.
  9. 9. The battery cell according to any one of claims 1 to 7, wherein the size of the support member is larger than the size of the electrode assembly in the second direction and the third direction, respectively, and a portion of the support member protruding from the electrode assembly is provided with corners, which are chamfer structures.
  10. 10. The battery cell of any one of claims 1-7, wherein the support has a connection face facing the first surface, the connection face conforming to and integrally connected with the first surface.
  11. 11. The battery cell of claim 10, wherein the integral connection comprises an adhesive or a hot melt connection.
  12. 12. The battery cell of any one of claims 1-7, further comprising an end cap, wherein the housing is provided with an opening along at least one of the opposite ends of the length direction of the electrode assembly, wherein the end cap is connected to the opening, and wherein the support is connected to the end cap.
  13. 13. The battery cell of claim 12, wherein the support is integrally connected to the end cap and/or the support is connected to the end cap by a connector.
  14. 14. The battery cell of claim 13, wherein the support member is integrally connected to the end cap, the integral connection comprising an adhesive or a hot melt connection.
  15. 15. The battery cell of claim 13, wherein the support member is connected to the end cap by a connector, the connector comprising a snap.
  16. 16. The battery cell of any one of claims 1-7, wherein the support has a dimension in the first direction of 0.1mm to 5mm.
  17. 17. The battery cell of claim 16, wherein the support has a dimension in the first direction of 0.5mm to 2mm.
  18. 18. The battery cell of any one of claims 1-7, wherein the support member is an insulating member.
  19. 19. The battery cell of claim 18, wherein the support comprises a plastic insulating layer.
  20. 20. A battery device comprising a battery housing and a battery cell according to any one of claims 1-19, the battery cell being mounted in the battery housing.

Description

Battery monomer, battery device and electric equipment Technical Field The application relates to the technical field of batteries, and in particular relates to a battery cell, a battery device and electric equipment. Background Currently, the more widely used battery devices are. The battery device can be a power battery or an energy storage battery. The battery device may include one or more battery cells. The battery device is easy to damage when being subjected to vibration impact, and the safety and the reliability of the battery device are affected, so that how to reduce the possibility of damage of the battery device when being subjected to vibration impact is one research direction in battery technology. Disclosure of utility model The application provides a battery unit, a battery device and electric equipment, which can reduce the possibility of damage to the battery device due to vibration impact. In a first aspect, an embodiment of the application provides a battery cell, which comprises a shell, an electrode assembly and a support member, wherein the electrode assembly is arranged in the shell and is provided with two first surfaces opposite to each other along a first direction, the first directions are intersected with the length direction of the electrode assembly, the support member is positioned between the electrode assembly and the shell, at least one support member is arranged on at least one of the two first surfaces, the support member protrudes out of the electrode assembly along at least one side of a second direction and/or a third direction, and the third direction is the length direction of the electrode assembly, and the first direction, the second direction and the third direction are intersected in pairs. By adopting the technical scheme, the electrode assembly is separated from the shell through the supporting piece, so that when the shell is subjected to vibration impact or the electrode assembly expands, the supporting piece is contacted with the shell, and the first surface is not in direct contact with the shell, so that the first surface of the electrode assembly is effectively protected, the risk of damage to the electrode assembly is reduced, and the service life of the electrode assembly is prolonged. The support member is designed to protrude from the electrode assembly along at least one side of the second direction, and the part of the support member protruding from the electrode assembly can be propped against the shell, so that two surfaces of the electrode assembly along the second direction can be protected, the surfaces of the electrode assembly along the second direction are separated from the shell, the possibility of damage caused by collision of the surfaces of the electrode assembly along the second direction and the shell when the battery cells vibrate or expand is reduced, and the possibility of damage caused by collision of the surfaces of the electrode assembly along the third direction and the shell when the battery cells vibrate or expand is reduced. In some embodiments of the application, the first surface is the surface of the electrode assembly having the largest area. By adopting the technical scheme, the support piece is arranged on the first surface with the largest area of the electrode assembly, and compared with the mode of arranging the support piece on other surfaces, the support protection can be carried out on a larger area of the electrode assembly. In some embodiments of the application, the support on the first surface covers all areas of the first surface. By adopting the technical scheme, the supporting piece is designed to cover the first surface, so that all areas of the first surface can be protected by the supporting piece, and the protection effect on the first surface is improved. In some embodiments of the application, the difference in the dimension of the support and the dimension of the electrode assembly in the second direction is greater than 0mm and less than or equal to 16mm. By adopting the technical scheme, the difference between the size of the support piece along the second direction and the size of the electrode assembly along the second direction is designed to be more than 0mm and less than or equal to 16mm, so that the protruding size of the support piece can meet the support requirement, and the size of the support piece is not too large to increase the volume of the battery cell. In some embodiments of the application, a difference in the dimension of the support and the dimension of the electrode assembly in the second direction is greater than or equal to 2mm and less than or equal to 6mm. By adopting the technical scheme, the protruding size of the supporting piece can meet the supporting requirement, and meanwhile, the volume of the battery monomer is not excessively increased, so that the energy density of the battery is influenced. In some embodiments of the application, a difference in the dimension o