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KR-102962886-B1 - END PLATE, END PLATE ASSEMBLY AND BATTERY PACK

KR102962886B1KR 102962886 B1KR102962886 B1KR 102962886B1KR-102962886-B1

Abstract

The present application provides an end plate, an end plate assembly, and a battery pack. The end plate is applied to a battery pack, the battery pack includes a battery box, and an insertion block is installed on the inner wall of the battery box; the end plate includes an end plate body, the end plate body having a first side wall and a second side wall arranged facing away from each other, the first side wall having a battery cell stack contact area, and the second side wall having a locking groove into which the insertion block is inserted, and the end plate body having a first through hole, and the locking groove communicating with the first through hole.

Inventors

  • 천 지아신
  • 란 한

Assignees

  • 이브 에너지 씨오., 엘티디.

Dates

Publication Date
20260512
Application Date
20241206
Priority Date
20240115

Claims (17)

  1. As an end plate (011), The above end plate (011) is applied to a battery pack, the battery pack includes a battery box (004), and an insertion block (041) is installed on the inner wall of the battery box (004); the end plate (011) includes an end plate (011) body, and is provided with a first side wall (1111) and a second side wall (1112) arranged opposite each other on the end plate (011) body, and a battery cell stack (003) contact area is provided on the first side wall (1111), and a locking groove (116) into which the insertion block (041) is inserted is provided on the second side wall (1112), and a first through hole (115) is provided on the end plate (011) body, and the locking groove (116) is in communication with the first through hole (115).
  2. In paragraph 1, The first through hole (115) above is an elliptical hole in the end plate (011).
  3. In paragraph 1, The above end plate (011) is provided with an avoidance groove (1113), and the bottom of the groove of the avoidance groove (1113) is in communication with one end of the first through hole (115).
  4. In paragraph 1, An end plate (011) having a first edge (1114) on the second side wall (1112) and a chamfer (1115) at the end of the first edge (1114).
  5. In paragraph 4, The above chamfer (1115) is a round chamfer (1115), and an end plate (011) in which the radius of the chamfer (1115) gradually decreases along the direction approaching the end surface of the first through hole (115).
  6. In paragraph 1, The second side wall (1112) is provided with a position limiting structure (112), and the position limiting structure (112) includes two blocking ribs (1121), and the two blocking ribs (1121) are spaced apart along the axial direction of the battery cell in an end plate (011).
  7. In paragraph 6, The above blocking rib (1121) is provided with a third side wall (11211) facing away from the first side wall (1111), and an inclined surface (11212) is provided on the side where the two blocking ribs (1121) face away from each other, and an end plate (011) in which both ends of the inclined surface (11212) are connected to the second side wall (1112) and the third side wall (11211).
  8. In paragraph 1, An end plate (011) having a lightning hole (113) provided in the first side wall (1111) above.
  9. In paragraph 8, A reinforcing plate is provided in the lightning hole (113), and both sides of the reinforcing plate are connected to the hole walls of the lightning hole (113); the reinforcing plate includes an inclined reinforcing plate (1141), a vertical reinforcing plate (1142), and a horizontal reinforcing plate (1143), and is provided with two inclined reinforcing plates (1141), and the two inclined reinforcing plates (1141) intersect each other, and the two inclined reinforcing plates (1141) are each connected to two pairs of opposite sides of the lightning hole (113); and an end plate (011) in which the vertical reinforcing plate (1142), the horizontal reinforcing plate (1143), and the inclined reinforcing plate (1141) intersect each other.
  10. In paragraph 1, The above-mentioned catch groove (116) is provided in the middle of the second side wall (1112), and both of the two side walls facing each other of the catch groove (116) are in communication with the first through hole (115); and/or, an end plate (011) in which the catch groove (116) is provided at the end of the second side wall (1112) and the catch groove (116) is in communication with the end of the first through hole (115).
  11. In paragraph 1, The end plate (011) has at least two battery cell stack (003) contact areas provided on the first side wall (1111).
  12. An end plate assembly (001) comprising an end plate unit, wherein the end plate unit comprises an end plate (011) according to any one of claims 1 to 11 and a strap (002) having its beginning and end connected to form an annular shape, the end plate unit comprising, It is equipped with two end plates (011), wherein the two end plates (011) are spaced apart along the stacking direction of the battery cells; An end plate assembly (001) in which both ends of the above-mentioned annular shape are each sleeve-installed on two of the above-mentioned end plates (011).
  13. In Paragraph 12, The above end plate assembly (001) further includes a fastening block (012) and has two end plate units, the two end plate units are installed in parallel, with the two end plates (011) of one end plate unit and the two end plates (011) of the other end plate unit installed in a one-to-one correspondence; the fastening block (012) is installed between both of the two corresponding end plates (011); and both ends of the fastening block (012) are detachably connected to the bodies of the two end plates (011).
  14. In Paragraph 13, The above fastening block (012) is provided with a V-shaped groove (121), and the two side groove walls of the V-shaped groove (121) are each in contact with two adjacent side walls of the end plate (011) body, forming an end plate assembly (001).
  15. In Paragraph 13, The above fastening block (012) is connected to the main body of the end plate (011) through a connecting member (043); and the hole in the fastening block (012) that is coupled with the connecting member (043) is an elliptical hole, in the end plate assembly (001).
  16. In Paragraph 13, The above fastening block (012) is connected to the main body of the end plate (011) through a connecting member (043), and the hole in the main body of the end plate (011) that is coupled with the connecting member (043) is the first through hole (115) of the end plate assembly (001).
  17. As a battery pack, It includes a battery box (004), a plurality of battery cells and an end plate assembly (001) according to claim 12, An insertion block (041) is installed on the inner wall of the battery box (004); Multiple battery cells are sequentially stacked to form a battery cell stack; A battery pack in which the above end plate assembly (001) is installed within the battery box (004), the battery cell stack is installed between two of the above end plates (011), and the above insertion block (041) is inserted into the locking groove (116).

Description

End Plate, End Plate Assembly and Battery Pack This application claims priority to a Chinese patent application filed with the China Intellectual Property Administration on January 15, 2024, with application number 202420100087.9, all contents of said application are incorporated by reference into this application. The present application relates to the field of battery technology, specifically to an end plate, an end plate assembly, and a battery pack. In the relevant technology, the battery includes a battery box and a battery module mounted within the battery box. The battery module includes a battery cell stack and an end plate assembly that secures the battery cell stack. The battery cell stack includes a plurality of battery cells stacked sequentially. The end plate assembly includes an end plate and a strap. End plates are installed at both ends of the stacking direction of the battery cells. The straps bind the end plates and the battery cells together to secure the plurality of battery cells as a single unit. Additionally, the end plates are secured to the battery box via screws, thereby securing the battery cells within the battery box. FIG. 1 is a schematic diagram of the structure of an end plate provided in an embodiment of the present application. Figure 2 is an enlarged view of part A of Figure 1. Figure 3 is a cross-sectional view according to BB of Figure 2. FIG. 4 is a schematic diagram of an end plate provided in an embodiment of the present application combined with a battery box. Figure 5 is an enlarged view of section C of Figure 1. Figure 6 is an enlarged view of section D of Figure 1. FIG. 7 is a schematic diagram of the structure of a partial structure of an end plate provided in an embodiment of the present application. FIG. 8 is a schematic diagram of the structure of an end plate assembly provided in an embodiment of the present application. FIG. 9 is a schematic diagram of a structure in which an end plate assembly and a battery cell stack provided in an embodiment of the present application are combined. FIG. 10 is a schematic diagram of the structure of another end plate assembly provided in an embodiment of the present application. Figure 11 is an enlarged view of section E of Figure 10. FIG. 12 is a schematic diagram of the structure of a fastening block provided in an embodiment of the present application. [Explanation of the symbol] 001-End plate assembly; 011-End plate; 111-End plate body; 1111-First side wall; 1112-Second side wall; 1113-Avoidance groove; 1114-First edge; 1115-Chamfer; 112-Position limiting structure; 1121-Blocking rib; 11211-Third side wall; 11212-Slanted surface; 113-Lightning hole; 1141-Slanted reinforcing plate; 1142-Longitudinal reinforcing plate; 1143-Transverse reinforcing plate; 115-First through hole; 116-Lock groove; 012-Fastening block; 121-V-groove; 122-Bolt through-hole; 002-Strap; 003-Battery cell laminate; 004-Battery box; 041-Insertion block; 411-Second through hole; 042-Screw hole; 043-Connecting member. Referring to FIG. 1, FIG. 1 is a schematic diagram of the structure of an end plate (011) provided in an embodiment of the present application. An embodiment of the present application provides an end plate (011). The end plate (011) is applied to a battery pack. The battery pack includes a battery box (004). An insertion block (041) is installed on the inner wall of the battery box (004). The end plate (011) includes an end plate body (111). The end plate body (111) is provided with a first side wall (1111) and a second side wall (1112) arranged opposite each other. A battery cell stack contact area is provided in the first side wall (1111). A catch groove (116) into which the insertion block (041) is inserted is provided in the second side wall (1112). A first through hole (115) is provided in the end plate body (111). The catch groove (116) is in communication with the first through hole (115), and as shown in FIGS. 2 and FIGS. 3, FIGS. 2 is an enlarged view of part A of FIGS. 1, and FIGS. 3 is a cross-sectional view along B-B of FIGS. 2. It can be understood that the first through hole (115) is located between the first side wall (1111) and the second side wall (1112). The battery cell stack contact area is the area in the end plate body (111) that contacts the battery cell stack (003). When the end plate (011) and the battery cell stack (003) are bound together using a strap (002), two end plates (011) are provided, and the two end plates (011) are each located at both ends of the battery cell stack. In the annular shape formed by connecting the beginning and end of the strap (002), the two ends of the annular shape are each fitted with sleeves on the two end plates (011) to firmly bind the two end plates (011) and the battery cell stack (003). Additionally, the end plate (011) and the battery cell stack must be bundled together as a single unit, placed in the battery box (004), and secured to the battery box (004) via a connecting