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CN-224232779-U - Battery pack end plate assembly and battery pack

CN224232779UCN 224232779 UCN224232779 UCN 224232779UCN-224232779-U

Abstract

The application provides a battery pack end plate assembly and a battery pack, relates to the technical field of batteries, and is used for facilitating the cell to enter a box and avoiding the insufficient rigidity of the battery pack. The battery pack end plate assembly includes an end plate body having a first side for mounting the battery cell stack and a second side having a boss thereon. The protruding portion is provided with a press-contact surface, and the press-contact surface is used for being connected with a battery pack box body of the battery pack. The crimping face has a first recess thereon extending to the second side. According to the battery pack end plate assembly and the battery pack, the end plate assembly and the battery pack are adhered to the connecting part of the battery pack box body through the pressure joint surface, and the adhesive is extruded onto the second side surface through the first groove through the pressure joint surface, so that the second side surface can be adhered to the other side surface of the connecting part, the end plate is prevented from being difficult to clamp with the cross beam part of the battery pack box body, and the rigidity of the battery pack is improved.

Inventors

  • FANG YOUWEI
  • LV XIXIANG
  • HE YONG
  • LIANG XINLONG
  • ZHANG LONG

Assignees

  • 合肥国轩高科动力能源有限公司

Dates

Publication Date
20260512
Application Date
20250127

Claims (10)

  1. 1. A battery pack end plate assembly characterized by comprising an end plate main body (10), wherein the end plate main body (10) is provided with a first side surface (11) and a second side surface (12), the first side surface (11) is used for installing a battery cell group, and the second side surface (12) is provided with a protruding part (20); The bulge (20) is provided with a press-contact surface (21), and the press-contact surface (21) is used for being adhered with a connecting part (31) of the battery pack box body (30); The pressure contact surface (21) has a first recess (211), the first recess (211) extending into the second side (12).
  2. 2. The battery pack end plate assembly of claim 1, wherein the second side (12) has a second groove (121) thereon, the second groove (121) being in communication with the first groove (211).
  3. 3. The battery pack end plate assembly according to claim 2, wherein the second side surfaces (12) are each provided with a blocking strip (122) at the outer periphery thereof, and the blocking strips (122) surround the second grooves (121).
  4. 4. A battery pack end plate assembly according to claim 3, wherein the sidewall of the first recess (211) is the same thickness as the blocking strip (122).
  5. 5. The battery pack end plate assembly of any one of claims 1-4, wherein the first recess (211) extends below the second side (12).
  6. 6. The battery pack end plate assembly according to any one of claims 1 to 4, wherein both ends of the boss (20) are flush with both ends of the end plate body (10).
  7. 7. The battery pack end plate assembly according to any one of claims 1-4, wherein the end plate body (10) is integrally formed with the boss (20).
  8. 8. The battery pack end plate assembly of any one of claims 1-4, wherein said first side (11) has adhesive thereon for bonding said cell stack.
  9. 9. A battery pack comprising a battery pack case (30), a battery cell stack, and a battery pack end plate assembly according to any one of claims 1-8; the battery cell group is connected with a first side (11) in the battery pack end plate assembly; The battery pack box body (30) is provided with a connecting part (31), the connecting part (31) is provided with a beam, and the beam is provided with a first plane (311) and a second plane (312); The first plane (311) is coated with structural adhesive, and the crimping surface (21) of the battery pack end plate assembly is pressed on the structural adhesive so that the structural adhesive flows onto the second side surface (12) through the first groove (211) in the battery pack end plate assembly; The second side (12) is bonded to the second plane (312) by the structural adhesive.
  10. 10. The battery pack of claim 9, further comprising a liquid cooling plate bonded to the bottom of the cell stack.

Description

Battery pack end plate assembly and battery pack Technical Field The application relates to the technical field of batteries, in particular to a battery pack end plate assembly and a battery pack. Background There are various battery packs in a grouping manner, and one scheme has been developed for the CTP-type battery pack to satisfy the weight saving. The battery pack directly integrates the battery core into the battery pack box body, so that the traditional standardized module link is skipped. When the battery cells are put into the box, each battery cell is arranged on the end plate, and the fins on the end plate are clamped on the cross beam of the battery pack box body to realize the box insertion. To avoid difficult box entry, the fins are typically clearance fit with the cross beam. However, the gap fit may result in a failure to grip between the end plates and the cross beam, resulting in insufficient stiffness of the battery pack. Disclosure of utility model The application provides a battery pack end plate assembly and a battery pack, which are used for facilitating the cell to enter a box and avoiding the insufficient rigidity of the battery pack. In order to achieve the above object, the present application provides the following technical solutions: An aspect of the present application provides a battery pack end plate assembly including an end plate body having a first side for mounting a battery cell stack and a second side having a boss thereon; The bulge part is provided with a press-connection surface which is used for connecting a battery pack box body of the battery pack; The crimp face has a first groove thereon extending to the second side. In one possible implementation, the second side has a second groove thereon, the second groove being in communication with the first groove. In one possible implementation, the second side faces are each provided with a blocking strip on the periphery, and the blocking strips surround the second grooves. In one possible implementation, the sidewall of the first groove is the same as the thickness of the blocking strip. In one possible implementation, the first recess extends below the second side. In one possible implementation, the two ends of the boss are flush with the two ends of the endplate body. In one possible implementation, the endplate body is integrally formed with the boss. In one possible implementation, the first side has an adhesive, which is used to bond the cell stack. Another aspect of the present application provides a battery pack comprising a battery pack case, a battery pack end plate assembly of any one of the above-described battery cell packs; The battery cell group is connected with a first side surface in the battery pack end plate assembly; the battery pack box body is provided with a connecting part, the connecting part is provided with a beam, and the beam is provided with a first plane and a second plane; the first plane is coated with structural adhesive, and the press-contact surface of the battery pack end plate assembly is pressed on the structural adhesive so that the structural adhesive flows onto the second side surface through the first groove in the battery pack end plate assembly; the second side is bonded to the second plane by the structural adhesive. In one possible implementation, the battery pack further includes a liquid cooling plate bonded to the bottom of the battery cell stack. The battery pack end plate assembly and the battery pack provided by the application have the following beneficial effects: The battery pack end plate assembly includes an end plate body having a first side for mounting the battery cell stack and a second side such that a plurality of battery cells can be mounted on the first side of the end plate body. The second side is provided with a protruding part, the protruding part is provided with a crimping surface, the crimping surface is provided with a first groove, and the first groove extends to the second side. The crimping face is arranged in bonding with the connecting portion in the battery pack box, and an adhesive is arranged between the crimping face and the connecting portion, and when the crimping face is pressed on the connecting portion, the adhesive flows into the second side face of the end plate main body along the first groove under the action of crimping force, so that the second side face can be bonded with the other side face of the connecting portion. Compared with the prior art, the battery pack end plate assembly and the battery pack are provided with the press-connection surface with the first groove on the protruding part, the press-connection surface is adhered to the connecting part of the battery pack box body, and the adhesive is extruded to the second side surface through the first groove by the press-connection surface, so that the second side surface can be adhered to the other side surface of the connecting part, the connection strength betwee