Battery pack

Patent metadata

Field	Value
Publication number	US-2021036278-A1
Application number	US-202016838066-A
Country	US
Kind code	A1
Filing date	Apr 2, 2020
Priority date	Aug 2, 2019
Publication date	Feb 4, 2021
Grant date	—

Abstract

A battery pack includes a box body assembly including a box body and a plurality of fixing beams which are fixed in the box body and divide the internal space into a plurality of containing cavities, a plurality of battery modules correspondingly arranged in each containing cavity and a plurality of restraint components, each of which includes a limit part, a first mounting part and a second mounting part. Each limit part covers each battery module correspondingly. The first and second mounting part are connected on both sides of the limit part in the direction in which the plurality of fixing beams are arranged and fixed with the fixing beams on both sides of the corresponding battery module respectively; the first mounting part of one of adjacent restraint components and the second mounting part of the other are fixed on the same fixing beam and overlapped in a height direction.

First claim

What is claimed is:

1 . A battery pack, comprising:
a box body assembly, comprising a box body and a plurality of fixing beams which are fixed to the box body and divide the box body into several containing cavities; a plurality of battery modules, each of which comprises a plurality of battery cells and is correspondingly arranged in each containing cavity; and a plurality of restraint components, each of which comprises a limit part, a first mounting part and a second mounting part, wherein each limit part covers each battery module correspondingly, the first mounting part and the second mounting part are respectively connected on both sides of the limit part in the direction in which the plurality of fixing beams are arranged, and are fixed with the fixing beams on both sides of the corresponding battery module respectively; wherein, for two adjacent restraint components, the first mounting part of one restraint component and the second mounting part of the other restraint component are fixed on the same fixing beam and are overlapped in a height direction.

2 . The battery pack of claim 1 , wherein the limit part protrudes from the first mounting part and the second mounting part in a direction away from the battery modules;
wherein there is a first distance L 1 between the bottom surface of the first mounting part and the top surface of the limit part, and a second distance L 2 between the bottom surface of the second mounting part and the top surface of the limit part; and wherein the first distance L 1 is greater than the second distance L 2 .

3 . The battery pack of claim 2 , wherein the plurality of restraint components comprises three adjacent restraint components which are a first restraint component, a second restraint component and a third restraint component, and the three adjacent restraint components are arranged in sequence along the direction in which the plurality of fixing beams are arranged; and
wherein the first mounting part of the first restraint component is below the second mounting part of the second restraint component, and the first mounting part of the second restraint component is below the second mounting part of the third restraint component.

4 . The battery pack of claim 1 , wherein the limit part protrudes from the first mounting part and the second mounting part in a direction away from the battery modules, and the two adjacent restraint components are a fourth restraint component and a fifth restraint component;
wherein in the fourth restraint component, there is a first distance L 1 between the bottom surface of the first mounting part and the top surface of the limit part, and between the bottom surface of the second mounting part and the top surface of the limit part; wherein in the fifth restraint component, there is a second distance L 2 between the bottom surface of the first mounting part and the top surface of the limit part, and between the bottom surface of the second mounting part and the top surface of the limit part; and wherein the fourth restraint component and the fifth restraint component are arranged alternately along the direction in which the plurality of fixing beams are arranged, and the first distance L 1 is greater than the second distance L 2 .

5 . The battery pack of claim 2 , wherein the thickness of the first mounting part is t and L 1 −L 2 ≥t.

6 . The battery pack of claim 1 , further comprising a plurality of fasteners;
wherein the first mounting part is provided with a plurality of first mounting holes spaced along the length direction of the fixing beams, and the second mounting part that is superposed on the first mounting part in the height direction is provided with a plurality of second mounting holes spaced along the length direction of the fixing beams; and wherein each fastener passes through the corresponding second mounting hole and the corresponding first mounting hole in turn and is fixed with the corresponding fixing beam.

7 . The battery pack of claim 6 , wherein the first mounting part is located below the second mounting part which is overlapped on the first mounting part in the height direction, and the diameter of the second mounting holes is smaller than the diameter of the first mounting holes.

8 . The battery pack of claim 1 , wherein a stiffener is provided on the limit part.

9 . The battery pack of claim 1 , wherein each restraint component has a split structure and covers at least part of the surface of the corresponding battery module.

10 . The battery pack of claim 1 , comprising an outer cover which is disposed on a side of the restraint components away from the battery modules and closes an open end of the box body.

11 . The battery pack of claim 10 , wherein there is a preset gap between an inner surface of the outer cover and an outer surface of the restraint components.

12 . The battery pack of claim 11 , wherein the preset gap is in a range of 2 mm to 100 mm.

13 . The battery pack of claim 1 , comprising at least one of the following:
a first adhesive layer arranged between a bottom surface of each battery module and an inner bottom surface of the box body; a second adhesive layer arranged between two adjacent battery cells in the battery modules; or a third adhesive layer arranged between a top of each battery module and the restraint components.

Assignees

• Contemporary Amperex Technology Co Ltd

Inventors

• Tang Yu
• Chen Yanbo
• Wang Peng
• You Kaijie
• Chen Xingdi

Classifications

• H01M50/262 Primary

  with fastening means, e.g. locks · CPC title

• H01M50/204

  Racks, modules or packs for multiple batteries or multiple cells · CPC title

• H01M50/271

  Lids or covers for the racks or secondary casings · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title