Battery pack

Patent metadata

Field	Value
Publication number	US-10777794-B2
Application number	US-201916394145-A
Country	US
Kind code	B2
Filing date	Apr 25, 2019
Priority date	Dec 30, 2018
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

The present application discloses a battery pack, comprising a first battery module, a second battery module, a housing and a fireproof member. The first battery module includes a plurality of battery cells which are provided with vents; the second battery module includes a plurality of battery cells which are provided with vents. Both the first battery module and the second battery module are arranged in the housing; the fireproof member is vertically disposed and located between the vents of the first battery module, where the vents of the first battery module and the vents of the second battery module both face the fireproof member. The battery pack prevents collective thermal runaway of the battery cells by using the fireproof member to separate the battery cells of the first battery modules and the battery cells of the second battery modules.

First claim

What is claimed is:

1. A battery pack, comprising:
a first battery module, comprising a plurality of battery cells, wherein each of the plurality of battery cells of the first battery module is provided with a vent;
a second battery module, comprising a plurality of battery cells, wherein each of the plurality of battery cells of the second battery module is provided with a vent;
a housing, for housing both the first battery module and the second battery module; and
a fireproof member, vertically arranged and located between the vent of the first battery module and the vent of the second battery module, wherein the vent of the first battery module and the vent of the second battery module face the fireproof member.

2. The battery pack according to claim 1 , wherein the plurality of battery cells of the first battery module are arranged in a vertical direction and/or a horizontal direction, and the plurality of battery cells of the second battery module are arranged in a vertical direction and/or a horizontal direction.

3. The battery pack according to claim 2 , wherein the fireproof member extends along an arrangement direction of the battery cells, and covers the vents of the first battery module and the vents of the second battery module.

4. The battery pack according to claim 1 , wherein the fireproof member comprises a fireproof member body and a first extension connected to an upper end of the fireproof member body and the first extension extends in a direction towards the first battery module; and/or,
the fireproof member comprises a fireproof member body and a second extension connected to a lower end of the fireproof member and the second extension extends in a direction towards the first battery module.

5. The battery pack according to claim 4 , wherein the first battery module further comprises two first end plates, and the two first end plates are respectively located at two ends of the first battery module having the plurality of battery cells in a horizontal direction, and the first extension and/or second extension of the fireproof member is fixed to the first end plate.

6. The battery pack according to claim 5 , wherein a top surface of the first end plate is provided with a fixing protrusion extending in the vertical direction, the first extension of the fireproof member is provided with a fixing bore for accommodating the fixing protrusion; or
a lower surface of the first extension of the fireproof member is provided with a fixing protrusion extending in the vertical direction, and the top surface of the first end plate is provided with a fixing bore for accommodating the fixing protrusion.

7. The battery pack according to claim 1 , wherein the fireproof member comprises a fireproof member body, a first extension and a second extension, wherein the first extension and the second extension are respectively connected to an upper end and a lower end of the fireproof member body, and both extend in a direction towards the first battery module; and the first extension and the second extension are respectively located on a top side and a bottom side of the first battery module having the plurality of battery cells.

8. The battery pack according to claim 4 , wherein the fireproof member further comprises a third extension connected to the upper end of the fireproof member body and extending in a direction towards the second battery module; and/or
the fireproof member further comprises a fourth extension connected to the lower end of the fireproof member body and extending in a direction towards the second battery module.

9. The battery pack according to claim 8 , wherein the fireproof member body, the first extension, the second extension, the third extension and the fourth extension are in an integrated structure.

10. The battery pack according to claim 1 , wherein the fireproof member is fixed to the first battery module and/or the second battery module by glue.

11. The battery pack according to claim 1 , wherein the housing comprises an upper housing cap and a lower housing body in a sealed form; a bottom wall and/or a side wall of the lower housing body is provided with an accommodating slot for accommodating the fireproof member.

12. The battery pack according to claim 1 , wherein the fireproof member has a melting point greater than or equal to 500° C.

13. The battery pack according to claim 12 , wherein the fireproof member is made of mica.

Assignees

• Contemporary Amperex Technology Co Ltd

Inventors

• You Kaijie
• Jin Haizu
• Shi Dongyang
• Hu Fei
• Tang Yu
• Hou Yuepan
• Li Ziyuan
• Ma Jun

Classifications

• H01M50/209

  adapted for prismatic or rectangular cells (H01M50/216 takes precedence) · CPC title

• H01M50/271

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

• H01M50/30 Primary

  Arrangements for facilitating escape of gases · CPC title

• H01M50/394

  Gas-pervious parts or elements · CPC title

• H01M50/383 Primary

  Flame arresting or ignition-preventing means · CPC title