Battery module

Patent metadata

Field	Value
Publication number	US-2024178517-A1
Application number	US-202318518479-A
Country	US
Kind code	A1
Filing date	Nov 23, 2023
Priority date	Nov 29, 2022
Publication date	May 30, 2024
Grant date	—

Abstract

A battery module includes a battery cell assembly and a fire extinguishing member. The battery cell assembly includes a plurality of battery cell frames and a plurality of battery cells. The plurality of the battery cell frames are arranged sequentially along a length direction of the battery module. At least one battery cell is provided in at least some of the battery cell frames. Each battery cell frame is provided with a fire extinguishing slot, and the fire extinguishing slots on the plurality of the battery cell frames are communicated to each other to form a fire extinguishing channel. The fire extinguishing member is arranged in the fire extinguishing channel. The fire extinguishing channel extends along the length direction of the battery module, and the fire extinguishing member extends along the length direction of the battery module in the fire extinguishing channel.

First claim

1 . A battery module comprising a battery cell assembly and a fire extinguishing member, wherein the battery cell assembly comprises a plurality of battery cell frames and a plurality of battery cells, the plurality of the battery cell frames are arranged sequentially along a length direction of the battery module, at least one battery cell is provided in at least some of the battery cell frames; each battery cell frame is provided with a fire extinguishing slot, and the fire extinguishing slots on the plurality of the battery cell frames are communicated to each other to form a fire extinguishing channel, the fire extinguishing member is arranged in the fire extinguishing channel; the fire extinguishing slot extends along the length direction of the battery module, and the fire extinguishing slot extends through the battery cell frame, the fire extinguishing channel extends along the length direction of the battery module, and the fire extinguishing member extends along the length direction of the battery module in the fire extinguishing channel.

2 . The battery module as claimed in claim 1 , wherein a first fire extinguishing material is provided inside the fire extinguishing member, when a temperature of the fire extinguishing member reaches its melting point, the fire extinguishing member bursts so as to release the first fire extinguishing material inside the fire extinguishing member.

3 . The battery module as claimed in claim 1 , wherein the battery cell is provided with a tab, and the fire extinguishing slot is arranged on one side of the battery cell frame where the tab of the battery cell is located.

4 . The battery module as claimed in claim 3 , wherein the battery cell frame includes a cover plate, the cover plate is arranged on the side of the battery cell frame where the tab of the battery cell is located, and the fire extinguishing slot is provided on the cover plate.

5 . The battery module as claimed in claim 4 , wherein the cover plate is provided with a through hole for the tab of the battery cell to pass out.

6 . The battery module as claimed in claim 5 , wherein the battery cell is provided with two tabs located on the same side, and the two tabs are spaced apart from each other; the cover plate is arranged on the side of the battery cell frame where the tabs of the battery cell are located, and there are two through holes on the cover plate, the two through holes correspond to the two tabs, respectively, and the fire extinguishing slot is arranged between the two through holes, and/or the fire extinguishing slot is arranged on an outer side of the two through holes.

7 . The battery module as claimed in claim 6 , wherein the battery cell frame further comprises a thermal conductive frame connected to the cover plate, the thermal conductive frame is provided with an installation groove, and the battery cell is installed in the installation groove.

8 . The battery module as claimed in claim 7 , wherein the thermal conductive frame is provided with a first strap installation slot for installing a strap.

9 . The battery module as claimed in claim 5 , wherein the battery cell is provided with two tabs located on opposite sides, the battery cell frame comprises two cover plates, the two cover plates are respectively arranged on the opposite sides of the battery cell, and the two cover plates correspond to the two tabs of the battery cell, respectively, wherein each cover plate is provided with one through hole, and the fire extinguishing slot is arranged on one side or opposite two sides of the through hole.

10 . The battery module as claimed in claim 5 , wherein the battery module further comprises a busbar, the busbar is arranged on one side of the cover plate away from the battery cell, and the busbar is provided with a slit for the tab of the battery cell to pass out, the tab of the battery cell passes through the through hole and the slit in sequence and is electrically connected to the busbar.

11 . The battery module as claimed in claim 1 , wherein a second strap installation slot for installing the strap is provided on a bottom wall of the fire extinguishing slot.

12 . The battery module as claimed in claim 11 , wherein the battery cell frame is provided with a guiding hole at a position corresponding to the fire extinguishing slot, and heat generated by the battery cell after thermal runaway enters into the fire extinguishing slot via the guiding hole.

13 . The battery module as claimed in claim 12 , wherein the second strap installation slot is formed by recessing the bottom wall of the fire extinguishing slot, the non-recessed part of the bottom wall of the fire extinguishing slot forms a second step portion, and the guiding hole is provided on the second step portion.

14 . The battery module as claimed in claim 13 , wherein the fire extinguishing member is arranged along the second strap installation slot, and the fire extinguishing member does not fully cover the guiding hole.

15 . The battery module as claimed in claim 1 , wherein the battery module further comprises a protective plate, the protective plate is arranged on one side of the battery cell assembly where the fire extinguishing member is located; the protective plate is provided with an opening at a position corresponding to the fire extinguishing member.

16 . The battery module as claimed in claim 1 , wherein the fire extinguishing member is an elongated strip structure, and the fire extinguishing member extends from one end of the fire extinguishing channel to the opposite end of the fire extinguishing channel.

17 . The battery module as claimed in claim 2 , wherein the fire extinguishing member is an elongated strip structure, and the fire extinguishing member extends from one end of the fire extinguishing channel to the opposite end of the fire extinguishing channel.

18 . The battery module as claimed in claim 3 , wherein the fire extinguishing member is an elongated strip structure, and the fire extinguishing member extends from one end of the fire extinguishing channel to the opposite end of the fire extinguishing channel.

19 . The battery module as claimed in claim 4 , wherein the fire extinguishing member is an elongated strip structure, and the fire extinguishing member extends from one end of the fire extinguishing channel to the opposite end of the fire extinguishing channel.

20 . The battery module as claimed in claim 5 , wherein the fire extinguishing member is an elongated strip structure, and the fire extinguishing member extends from one end of the fire extinguishing channel to the opposite end of the fire extinguishing channel.

Assignees

• Microvast Power Systems Co Ltd

Inventors

• Chen Siyu
• Pan shengze
• Shen Mingfeng
• Li Bin
• Zhong Cheng

Classifications

• H01M50/383 Primary

  Flame arresting or ignition-preventing means · CPC title

• H01M50/15

  for prismatic or rectangular cells (H01M50/153 takes precedence) · CPC title

• H01M50/202

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

• 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