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CN-224232825-U - Battery pack and vehicle

CN224232825UCN 224232825 UCN224232825 UCN 224232825UCN-224232825-U

Abstract

The application provides a battery pack and a vehicle, and particularly relates to the technical field of batteries. The battery pack comprises a battery box body, an electric core unit and an end plate assembly. Wherein, the electric core unit is arranged in the battery box body. The end plate assembly is positioned at two sides of the battery cell unit in the first direction and is fixedly connected with the battery cell unit. The end plate component is provided with a groove and a protruding part, and the groove is clamped and connected with the protruding part. Therefore, the battery pack provided by the embodiment of the application can improve the accuracy of the installation and positioning of the battery cell unit and improve the reliability, convenience and stability of the connection of the battery cell unit by arranging the grooves and the protruding parts on the end plate assembly.

Inventors

  • WEI PENG
  • WU BAO
  • LV XIXIANG
  • CHENG SHENG

Assignees

  • 合肥国轩高科动力能源有限公司

Dates

Publication Date
20260512
Application Date
20250529

Claims (10)

  1. 1. A battery pack, comprising: a battery case (200); a battery cell unit (300), wherein the battery cell unit (300) is positioned in the battery box body (200); The end plate assemblies (400) are positioned on two sides of the battery cell unit (300) in the first direction and fixedly connected with the battery cell unit (300); The end plate assembly (400) is provided with a groove (421) and a protruding portion (411), and the groove (421) is clamped and connected with the protruding portion (411).
  2. 2. The battery pack according to claim 1, wherein the end plate assembly (400) comprises a first end plate (410) and a second end plate (420), one face of the first end plate (410) is fixedly connected with the battery cell unit (300), and the other face of the first end plate (410) is provided with the protruding portion (411); The second end plate (420) is provided with the groove (421) on one surface facing the first end plate (410), and the groove (421) is arranged corresponding to the protruding part (411).
  3. 3. The battery pack according to claim 2, further comprising a limit assembly (500), the limit assembly (500) comprising a limit recess (510) and a limit projection (520), the limit recess (510) and the limit projection (520) being disposed opposite each other; The limiting concave part (510) is arranged on the protruding part (411), the limiting protrusion (520) is arranged on the groove (421), and the limiting concave part (510) is clamped and connected with the limiting protrusion (520).
  4. 4. A battery pack according to claim 3, wherein the protrusion (411) has a first end (4111) and a second end (4112), the first end (4111) penetrating the first end plate (410) in a third direction, the second end (4112) being provided with the limit recess (510); The groove (421) is provided with a third end (4211) and a fourth end (4212), the third end (4211) penetrates through the second end plate (420) in the third direction, and the fourth end (4212) is provided with the limit protrusion (520).
  5. 5. The battery pack according to any one of claims 2 to 4, wherein the battery case (200) includes at least two cross members (210), at least two of the cross members (210) being located on both sides of the battery cell unit (300) in the first direction, respectively; The cross beam (210) is positioned on one surface of the end plate assembly (400) which faces away from the battery cell unit (300).
  6. 6. The battery pack of claim 5, further comprising a spacer (600), the spacer (600) being located between the cross beam (210) and the end plate assembly (400); The cross beam (210) is fixedly connected with the second end plate (420) through the spacer (600).
  7. 7. The battery pack according to claim 5, wherein the second end plate (420) has a plurality of structural connecting arms (422) on a surface facing the beam (210), and a plurality of structural cavities (423) are defined between the plurality of structural connecting arms (422).
  8. 8. The battery pack according to claim 5, further comprising a liquid cooling plate (700), the liquid cooling plate (700) being located below the battery cell unit (300); The liquid cooling plate (700) is fixedly connected with the battery cell unit (300) through an adhesive piece (710).
  9. 9. The battery pack according to claim 8, wherein the battery case (200) further comprises a case frame (220); The box frame (220) is provided with a mounting cavity (221), and the battery cell unit (300), the end plate assembly (400), the cross beam (210) and the liquid cooling plate (700) are all located in the mounting cavity (221).
  10. 10. A vehicle characterized by comprising a battery pack (100) according to any one of the preceding claims 1-9.

Description

Battery pack and vehicle Technical Field The application relates to the technical field of batteries, in particular to a battery pack and a vehicle. Background With the progress of technology and the increase in demand for renewable energy sources, power batteries are widely used in various fields such as electric automobiles, renewable energy storage, consumer electronics, industrial equipment, and the like. The battery pack is used as a core part of a power battery system, and is a main mode for integrating the power battery at present. The Cell To Pack (CTP) grouping technique has advantages of high energy density and low cost compared with the conventional Cell To Module (CTM) grouping technique. In CTP battery package, the liquid cooling board is as main bearing part, adopts flowing between liquid cooling board and box frame and the crossbeam and bores screw (Flow DRILL SCREW, FDS) technique to connect generally, probably leads to the liquid cooling board on the screw hole site near stress big, exists the inefficacy risk. In order to increase the connection between the battery cell and the cross beam and reduce the stress of the liquid cooling plate, the modes of improving the pretightening force of the battery cell, overflowing glue at the bottom of the end plate, filling glue into the end plate and the like are generally adopted. However, in the conventional battery pack, in a manner of improving the cell pre-tightening force, it is difficult to ensure the consistency of the formed cell pre-tightening force due to the thickness difference of different cells, and there is an unreliable factor. For the mode of glue overflow at the bottom of the end plate, the glue overflow height cannot be ensured and cannot be observed because the fluidity of the heat conduction structural glue is different along with the time change. The flowability problem is also present for the end plate glue filling mode. In addition, the situation that the heat conduction structure glue drops exists in the glue filling process, and pollution can possibly be generated inside the battery pack. Disclosure of utility model The embodiment of the application provides a battery pack and a vehicle. Through be equipped with recess and bellying on the end plate subassembly, can improve the accuracy of electric core unit installation location, promoted reliability, convenience and the stability that electric core unit connects. A first aspect of the present application provides a battery pack comprising: a battery case; The battery cell unit is positioned in the battery box body; the end plate assemblies are positioned on two sides of the battery cell unit in the first direction and fixedly connected with the battery cell unit; the end plate component is provided with a groove and a protruding part, and the groove is clamped and connected with the protruding part. The battery pack provided by the first aspect of the embodiment of the application comprises a battery box body, a battery cell unit and an end plate assembly. Wherein, the electric core unit is arranged in the battery box body. The end plate assembly is positioned at two sides of the battery cell unit in the first direction and is fixedly connected with the battery cell unit. The end plate component is provided with a groove and a protruding part, and the groove is clamped and connected with the protruding part. Therefore, the battery pack provided by the embodiment of the application can improve the accuracy of the installation and positioning of the battery cell unit and improve the reliability, convenience and stability of the connection of the battery cell unit by arranging the grooves and the protruding parts on the end plate assembly. In one possible implementation, the end plate assembly comprises a first end plate and a second end plate, one surface of the first end plate is fixedly connected with the battery cell unit, and the other surface of the first end plate is provided with a protruding part; The second end plate is provided with a groove on one surface facing the first end plate, and the groove is arranged corresponding to the protruding part. In one possible implementation mode, the device further comprises a limiting assembly, wherein the limiting assembly comprises a limiting concave part and a limiting convex part which are oppositely arranged; The limiting concave part is arranged on the protruding part, the limiting protrusion is arranged on the groove, and the limiting concave part is clamped and connected with the limiting protrusion. In one possible embodiment, the protruding portion has a first end and a second end, the first end penetrating through the first end plate in the third direction, the second end being provided with a limit recess; The groove is provided with a third end and a fourth end, the third end penetrates through the second end plate in the third direction, and the fourth end is provided with a limiting protrusion. In one possible emb