Battery pack case and battery pack

Patent metadata

Field	Value
Publication number	US-11539092-B2
Application number	US-201816977508-A
Country	US
Kind code	B2
Filing date	Dec 28, 2018
Priority date	Mar 30, 2018
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

The application relates to a battery pack case and a battery pack. The battery pack case includes: a bottom plate and a side plate connected with the bottom plate, the bottom plate and the side plate surround to form an accommodating portion configured to accommodate a unit cell; the bottom plate is provided with a plurality of first grooves and a plurality of second grooves opening toward the accommodating portion, the plurality of first grooves are spaced apart from each other, the plurality of second grooves are spaced apart from each other, and the first grooves and the second grooves are arranged to cross each other. The bottom plate of the battery pack itself has good rigidity, is not prone to warp deformation, and can prevent the overflow of structural glue from contaminating the wiring harness or electrical components.

First claim

What is claimed is:

1. A battery pack case, comprising:
a bottom plate and a side plate connected to the bottom plate, wherein the bottom plate and the side plate surround to form an accommodating portion configured to accommodate a unit cell;
a plurality of first grooves and a plurality of second grooves opening toward the accommodating portion are provided on the bottom plate, wherein the plurality of first grooves are spaced apart from each other, the plurality of second grooves are spaced apart from each other, and the first grooves and the second grooves are arranged to cross each other,
wherein the battery pack case further comprises a strip plate, the strip plate is disposed at a connection between a long side of the bottom plate along a length direction of the bottom plate and the side plate, the strip plate comprises a first long side along the length direction of the bottom plate and a second long side along the length direction of the bottom plate opposite to each other, the first long side is connected and fixed to the side plate, and the second long side is connected and fixed to the long side of the bottom plate,
wherein a surface of the bottom plate facing away from the accommodating portion is further provided with a plurality of first convex portions corresponding to the first grooves and a plurality of second convex portions corresponding to the second grooves.

2. The battery pack case according to claim 1 , wherein the first grooves extend in a length direction of the bottom plate, and the plurality of first grooves are arranged in parallel, and the second grooves extend in a width direction of the bottom plate, and the plurality of second grooves are arranged in parallel.

3. The battery pack case according to claim 2 , wherein the first grooves and the second grooves are perpendicular to each other.

4. The battery pack case according to claim 1 , wherein a surface of the second long side facing away from the bottom plate is lower than a surface of the bottom plate facing the accommodating portion, the strip plate further comprises a plurality of first glue receiving grooves provided on the second long side, and the plurality of first glue receiving grooves are arranged at intervals along the length direction of the bottom plate.

5. The battery pack case according to claim 4 , wherein the intermediate supporting section protrudes away from the bottom plate, the intermediate supporting section comprises a top surface parallel to a surface of the bottom plate facing the accommodating portion and a fixing hole provided on the top surface and configured to fix the unit cell.

6. The battery pack case according to claim 4 , wherein a surface of the second connecting section facing away from the bottom plate is lower than a surface of the bottom plate facing the accommodating portion, the supporting beam further comprises a plurality of second glue receiving grooves provided on the second connecting section, the plurality of second glue receiving grooves are arranged at intervals along the width direction of the bottom plate.

7. The battery pack case according to claim 1 , wherein the battery pack case further comprises a supporting beam provided on a surface of the bottom plate facing the accommodating portion, the supporting beam comprises a first connecting section, an intermediate supporting section and a second connecting section successively distributed, the first connecting section is connected and fixed to the side plate or a wide side of the bottom plate along a width direction of the bottom plate, and the second connecting section is connected and fixed to the wide side of the bottom plate, the intermediate supporting section is configured to install the unit cell.

8. A battery pack, comprising:
a battery pack case comprising a bottom plate and a side plate connected to the bottom plate, wherein the bottom plate and the side plate surround to form an accommodating portion configured to accommodate a unit cell, a plurality of first grooves and a plurality of second grooves opening toward the accommodating portion are provided on the bottom plate, the plurality of first grooves are spaced apart from each other, the plurality of second grooves are spaced apart from each other, and the first grooves and the second grooves are arranged to cross each other;
a plurality of battery assemblies provided in the accommodating portion and supported by the bottom plate, the plurality of battery assemblies are arranged side by side along a width direction of the bottom plate, and each of the battery assemblies comprises a plurality of unit cells arranged side by side in a length direction of the bottom plate,
wherein the battery pack case further comprises a strip plate, the strip plate is disposed at a connection between a long side of the bottom plate along a length direction of the bottom plate and the side plate, the strip plate comprises a first long side along the length direction of the bottom plate and a second long side along the length direction of the bottom plate opposite to each other, the first long side is connected and fixed to the side plate, and the second long side is connected and fixed to the long side of the bottom plate,
wherein a surface of the bottom plate facing away from the accommodating portion is further provided with a plurality of first convex portions corresponding to the first grooves and a plurality of second convex portions corresponding to the second grooves.

Assignees

• Contemporary Amperex Technology Co Ltd

Inventors

• Xie Zhaolin
• Wang Peng
• Wang Derong
• Chan Libing
• Wang Zengzhong
• Chen Yifeng

Classifications

• H01M50/291

  characterised by their shape · CPC title

• H01M50/202

  Casings or frames around the primary casing of a single cell or a single battery · CPC title

• H01M50/207 Primary

  characterised by their shape · CPC title

• H01M2220/20

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

• H01M50/10

  Primary casings; Jackets or wrappings · CPC title