Battery module and battery pack

Patent metadata

Field	Value
Publication number	US-11094994-B2
Application number	US-201916394148-A
Country	US
Kind code	B2
Filing date	Apr 25, 2019
Priority date	Dec 30, 2018
Publication date	Aug 17, 2021
Grant date	Aug 17, 2021

Abstract

The present disclosure discloses a battery module and a battery pack. The battery module comprises a plurality of battery cells and a fireproof member, wherein each of the plurality of battery cells is provided with a vent, and the vent faces the fireproof member; wherein the fireproof member includes a fireproof member body and a first extension connected to an upper end of the fireproof member; and/or a second extension connected to a lower end of the fireproof member. When thermal runaway occurs to the battery cells, flames and high temperature particles ejected out of the vent are blocked by the fireproof member body and the first extension and/or the second extension, thus preventing the ejected flames and high temperature particles from burning neighboring battery cells, and preventing the battery cells that has undergone thermal runaway from inducing thermal runaway of the neighboring battery cells opposite to the vents.

First claim

What is claimed is:

1. A battery module, comprising:
a plurality of battery cells arranged in a first horizontal direction, wherein each of the plurality of battery cells is provided with a vent oriented in a second horizontal direction; and
a fireproof member, wherein the vent of each of the plurality of battery cells faces the fireproof member, and the fireproof member covers all vents of the battery cells;
wherein the fireproof member comprises a fireproof member body, a first extension connected to an upper end of the fireproof member, and a second extension connected to a lower end of the fireproof member body, the fireproof member body extends in a vertical direction, the first extension and the second extension extend in a direction towards the battery cells; and
the first extension overlaps at least partially an upper surface of the battery cells, the second extension overlaps at least partially a lower surface of the battery cells; and projections of the first extension and the second extension extend over the entire length of the battery module in the first horizontal direction.

2. The battery module according to claim 1 , wherein the battery module further comprises two end plates respectively located at two ends of the plurality of battery cells in the first horizontal direction, and the first extension and/or second extension of the fireproof member are/is fixed to the end plates.

3. The battery module according to claim 2 , wherein a top surface of each of the two end plates 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 end plate is provided with a fixing bore for accommodating the fixing protrusion.

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

5. A battery pack, comprising:
a housing, and
a plurality of battery modules arranged in the housing; wherein each of the plurality of battery modules comprises a plurality of battery cells arranged in a first horizontal direction, and each of the plurality of battery cells is provided with a vent oriented in a second horizontal direction; and
a fireproof member, wherein the vent of each of the plurality of battery cells faces the fireproof member, the fireproof member covers all vents of the battery cells, and the fireproof member comprises a fireproof member body, a first extension connected to an upper end of the fireproof member, and a second extension connected to a lower end of the fireproof member body, the fireproof member body extends in a vertical direction, the first extension and the second extension extend in a direction towards the battery cells; and
the first extension overlaps at least partially an upper surface of the battery cells, the second extension overlaps at least partially a lower surface of the battery cells; and projections of the first extension and the second extension extend over the entire length of the battery module in the first horizontal direction.

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

7. The battery pack according to claim 6 , wherein a top surface of each of the two end plates 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 end plate is provided with a fixing bore for accommodating the fixing protrusion.

8. The battery pack according to claim 5 , wherein the fireproof member has a melting point greater than or equal to 500° C.

Assignees

• Contemporary Amperex Technology Co Ltd

Inventors

• Chen Xingdi
• You Kaijie
• Tang Yu
• Li Ziyuan
• Hou Yuepan
• Ma Jun

Classifications

• H01M10/658 Primary

  by thermal insulation or shielding · CPC title

• H01M50/249

  specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) · CPC title

• H01M50/209

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

• H01M50/24 Primary

  adapted for protecting batteries from their environment, e.g. from corrosion (thermal insulation H01M10/658) · CPC title

• H01M50/383

  Flame arresting or ignition-preventing means · CPC title