Battery module, battery rack comprising same, and power storage device

Patent metadata

Field	Value
Publication number	US-2023223621-A1
Application number	US-202117624899-A
Country	US
Kind code	A1
Filing date	Feb 4, 2021
Priority date	Feb 27, 2020
Publication date	Jul 13, 2023
Grant date	—

Abstract

Disclosed is a battery module with reduced risk of fire propagation or explosion. To achieve the above-described object, the battery module according to the present disclosure includes a cell assembly including a plurality of secondary batteries, a module housing in which the cell assembly is received in an internal space, the module housing having an opening through which the internal space is in communication with an external space, and an adjustment cover configured to cover at least a part of the opening to fill a fire extinguishing agent supplied into the battery module to a predetermined height or above.

First claim

What is claimed is:

1 . A battery module, comprising:
a cell assembly including a plurality of secondary batteries; a module housing in which the cell assembly is received in an internal space, the module housing having an opening through which the internal space is in communication with an external space; and an adjustment cover configured to cover at least a part of the opening to fill a fire extinguishing agent supplied into the module housing to a predetermined height or above.

2 . The battery module according to claim 1 , wherein the adjustment cover is disposed outside of the opening, and has an end connected to an outer surface of the module housing.

3 . The battery module according to claim 2 , wherein the adjustment cover has an open top.

4 . The battery module according to claim 2 , wherein the opening includes an inlet through which outside air enters the module housing, and an outlet formed in a part of the module housing to allow inside air to exit, and
the adjustment cover is provided in each of the inlet and the outlet.

5 . The battery module according to claim 1 , wherein the battery module is configured to supply the fire extinguishing agent into the module housing when an internal temperature of the module housing rises above the predetermined temperature, and
the adjustment cover includes a sealing element configured to seal a top of the adjustment cover by the fire extinguishing agent supplied to the battery module.

6 . The battery module according to claim 5 , wherein the sealing element includes a cap configured to seal the top of the adjustment cover by buoyancy when the fire extinguishing agent is supplied to the battery module.

7 . The battery module according to claim 6 , wherein the sealing element includes a stopper provided on the top of the adjustment cover to prevent the adjustment cover from being forced out by the fire extinguishing agent, and a fixation cord connected to the cap.

8 . The battery module according to claim 5 , wherein the sealing element includes a synthetic fiber configured to absorb a part of the fire extinguishing agent and expand volume to close at least a part of the opening when the synthetic fiber contacts the fire extinguishing agent supplied into the module housing.

9 . A battery rack comprising the battery module according to any one of claims 1 to 8 and a rack case in which the battery module is received.

10 . An energy storage system comprising at least two battery racks according to claim 9 .

Assignees

• Lg Energy Solution Ltd

Inventors

• Ok Seung-Min
• Hong Sung-Goen
• Namgoung Hyeok
• Bae Kyung-Hyun
• Shin Jin-Kyu
• Lee Jin-Kyu

Classifications

• H01M50/211 Primary

  adapted for pouch cells · CPC title

• H01M50/20 Primary

  Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders (structural combination of accumulators with charging apparatus H01M10/46) · CPC title

• H01M50/143 Primary

  Fireproof; Explosion-proof · CPC title

• A62C3/16

  in electrical installations, e.g. cableways · CPC title

• H01M2200/00

  Safety devices for primary or secondary batteries · CPC title