Search

CN-122025959-A - End plate assembly, battery module, battery and power utilization device

CN122025959ACN 122025959 ACN122025959 ACN 122025959ACN-122025959-A

Abstract

The embodiment of the application provides an end plate assembly, a battery module, a battery and an electric device. The first end plate comprises a first plate body and two hemming structures, wherein the two hemming structures are positioned at two opposite ends of the first plate body along a first direction. The second end plate is attached to the first plate body, and one side, deviating from the first end plate, of the second end plate is used for being connected with the battery cell. The hemming structure extends along the direction from the first end plate to the second end plate and forms an accommodating space with the first plate body in a surrounding mode, at least part of the second end plate is located in the accommodating space and is attached to the first plate body, the second end plate abuts against or is arranged in a gap with at least one hemming structure in the first direction, and the first direction intersects with the arrangement direction of the first end plate and the second end plate. The application can prolong the service life of the battery monomer.

Inventors

  • ZHANG HUA
  • ZHOU XINHUA
  • PENG HAORAN
  • GENG ZHENGWEI
  • WANG XIAO

Assignees

  • 宁德时代新能源科技股份有限公司

Dates

Publication Date
20260512
Application Date
20230720

Claims (20)

  1. 1. An end plate assembly is provided, which is provided with a plurality of end plates, characterized by comprising the following steps: The first end plate comprises a first plate body and two hemming structures, wherein the two hemming structures are positioned at two opposite ends of the first plate body along a first direction; The second end plate is attached to the first plate body, and one side, away from the first end plate, of the second end plate is used for being connected with the battery cell; The hemming structure extends along the direction from the first end plate to the second end plate, forms an accommodating space with the first plate body in a surrounding mode, is positioned in the accommodating space and is attached to the first plate body, and is abutted against or in a gap with at least one hemming structure in the first direction, and the first direction intersects the arrangement direction of the first end plate and the second end plate; The second end plate comprises a second plate body and a filling structure, wherein the second plate body is connected with the battery cell, the second plate body is used for being attached to the battery cell, the filling structure is arranged on one side, facing the first end plate, of the second plate body, at least part of the filling structure is positioned in the accommodating space and attached to the first plate body, two curled edge structures are positioned on two sides of the filling structure in the first direction, and at least one curled edge structure and the filling structure are propped against or are arranged in a gap in the first direction; The hemming structure comprises a first wall body, a second wall body and a third wall body which are sequentially connected at an angle along the bending direction of the hemming structure, wherein the first wall body, the second wall body and the third wall body are enclosed to form a containing cavity, the first wall body and the third wall body are oppositely arranged along the second direction, the first wall body is connected with the first plate body, one end of the third wall body, which is away from the second wall body, is propped against the filling structure or is provided with a gap, and the second direction is parallel to the arrangement direction of the first end plate and the second end plate; The end plate assembly further includes a support member at least partially positioned in the receiving cavity and connected to the first wall and the third wall.
  2. 2. The endplate assembly of claim 1, wherein two of the bead structures are disposed against or in gaps with the filler structure in the first direction, respectively.
  3. 3. The end plate assembly of claim 1, wherein the second plate body protrudes from opposite ends of the filler structure in the first direction, and two of the hemming structures are attached and connected to opposite ends of the second plate body in the first direction.
  4. 4. The endplate assembly of claim 1 wherein the second plate body projects beyond opposite ends of the filler structure in the first direction, and the third wall is bonded and connected to the second plate body.
  5. 5. The endplate assembly of claim 1, wherein at least a portion of the first wall protrudes from the first plate body in a direction that the second endplate points toward the first endplate.
  6. 6. The endplate assembly of claim 1 wherein at least a portion of the second wall protrudes from the second endplate in the first direction.
  7. 7. The endplate assembly of claim 1 wherein the first wall and the second wall transition smoothly.
  8. 8. The endplate assembly of claim 1, wherein the hemming structure further includes at least one fourth wall connected at an angle to at least one end of the third wall in a third direction, the fourth wall covering at least a portion of the receiving cavity and having a first through hole through which a target connector passes, the third direction, the first direction, and the second direction intersecting one another.
  9. 9. The endplate assembly of claim 8, wherein the number of fourth walls is two, two of the fourth walls are connected to opposite ends of the third wall in the third direction, and two of the first through holes are aligned along the third direction.
  10. 10. The endplate assembly of claim 8 wherein a projection of the fourth wall onto the first wall in the third direction covers at least a portion of the first wall and abuts an end of the first wall or has a gap.
  11. 11. The endplate assembly of claim 1 wherein the support member includes a support body and protrusions disposed on opposite sides of the support body in the second direction, The first wall body and the third wall body are respectively provided with a second through hole, and the protrusions are in plug-in fit with the second through holes.
  12. 12. The endplate assembly of claim 11, wherein when the hemming structure includes a fourth wall, the fourth wall protrudes from the first wall in a direction from the second endplate to the first endplate, The plurality of bulges arranged on the supporting body comprise first bulges, the first bulges are in plug-in fit with the first wall body and protrude out of the first wall body, and the first bulges and the fourth wall body are arranged at intervals to form a spacing space for spacing the spacing belt between the first bulges and the fourth wall body.
  13. 13. An end plate assembly according to any one of claims 1-12, wherein the side of the second plate body facing away from the filling structure is planar.
  14. 14. The endplate assembly of any of claims 1-12, wherein the filler structure includes a plurality of staggered ribs, a plurality of the ribs surrounding the second plate body to form a plurality of grooves opening toward the first endplate.
  15. 15. An endplate assembly according to any of claims 1-12, wherein the filler structure is a solid structure.
  16. 16. The endplate assembly of any of claims 1-12, wherein the first plate body has two ends that are opposite in a third direction, the hemming structure extending from one end of the first plate body to the other end, the first direction intersecting the third direction.
  17. 17. The endplate assembly of any of claims 1-12, wherein the first plate body includes a base plate and a first protrusion protruding from the base plate in a direction from the second endplate to the first endplate, a side of the first protrusion facing the second endplate being formed with a recessed space, and the second endplate is attached to the base plate and the first protrusion.
  18. 18. The endplate assembly of claim 17, wherein the number of first protrusions is a plurality, the plurality of first protrusions being spaced apart along a third direction and extending along the first direction, the third direction and the second direction intersecting the first direction two by two, the second direction being parallel to the direction of alignment of the first endplate and the second endplate.
  19. 19. The endplate assembly of any of claims 1-12, wherein one of the first endplate and the second endplate is provided with a spacing tab and the other is provided with a spacing aperture, the spacing tab and the spacing aperture being in a plug-in fit.
  20. 20. The endplate assembly of claim 1 wherein the second plate body is an insulator.

Description

End plate assembly, battery module, battery and power utilization device The application is a divisional application of an application patent application with the application date of 2023, 7 and 20, the application number of 202310896123.7 and the name of an end plate assembly, a battery module, a battery and an electric device. Technical Field The present application relates to the field of battery technology, and more particularly, to an end plate assembly, a battery module, a battery, and an electric device. Background Battery cells are widely used in electronic devices such as cellular phones, notebook computers, battery cars, electric vehicles, electric airplanes, electric ships, electric toy vehicles, electric toy ships, electric toy airplanes, electric tools, and the like. In the development of battery technology, how to extend the service life of a battery cell is one research direction in battery technology. Disclosure of Invention The application provides an end plate assembly, a battery module, a battery and an electric device, which can prolong the service life of a battery cell. An embodiment of the application provides an end plate assembly, which comprises a first end plate and a second end plate. The first end plate comprises a first plate body and two hemming structures, wherein the two hemming structures are positioned at two opposite ends of the first plate body along a first direction. The second end plate is attached to the first plate body, and one side, deviating from the first end plate, of the second end plate is used for being connected with the battery cell. The hemming structure extends along the direction from the first end plate to the second end plate, forms an accommodating space with the first plate body in a surrounding manner, is at least partially positioned in the accommodating space and is attached to the first plate body, and the second end plate is abutted or gap-arranged with at least one hemming structure in a first direction which intersects the arrangement direction of the first end plate and the second end plate; the second end plate comprises a second plate body and a filling structure, wherein the second plate body is connected with the battery unit, the filling structure is arranged on one side, facing the first end plate, of the second plate body, at least part of the filling structure is located in the accommodating space and is attached to the first plate body, two curled edge structures are located on two sides of the filling structure in the first direction, at least one curled edge structure is abutted against or in a gap with the filling structure in the first direction, the curled edge structure comprises a first wall body, a second wall body and a third wall body which are sequentially and angularly connected along a bending direction, an accommodating cavity is formed by encircling the first wall body, the second wall body and the third wall body, the first wall body and the third wall body are oppositely arranged along the second direction, the first wall body is connected with the first plate body, one end, deviating from the second wall body, abutted against or in a gap is formed between the filling structure, the second direction is parallel to the arrangement direction of the first end plate and the second end plate, at least part of the supporting piece is located in the accommodating cavity and is connected with the first wall body and the third wall body. In the above technical scheme, the second end plate can play a supporting role on at least one hemming structure in the first direction, so that deformation of the hemming structure in the first direction is reduced, and accordingly supporting capacity of the first end plate in the first direction is improved, deformation of a structure for limiting expansion, such as a limiting belt, in the arrangement direction of the first end plate and the second end plate is reduced, limiting effect of the end plate assembly on expansion of the battery cell is improved, deformation of the battery cell is reduced, and service life of the battery cell is prolonged. The second plate body used for being connected with the battery monomers is arranged, so that the filling structure can be arranged more flexibly, namely, a hollow structure can be adopted, and a solid structure or other structures can be adopted. The existence of holding the chamber can make the turn-up structure have better holding power in the second direction, reduces the deformation that the turn-up structure produced in the second direction after the atress, plays good guard action to the battery monomer. And when using spacing bringing to restrict the free inflation of battery, the limit area can be played in the second direction and support and tensioning effect to limit area, improves limit area to the free restriction effect of the free inflation of battery, reduces the free deformation of battery. When the limit belt is matched with