Battery module having fire-extinguishing unit

Patent metadata

Field	Value
Publication number	US-2023035877-A1
Application number	US-202017791750-A
Country	US
Kind code	A1
Filing date	Nov 12, 2020
Priority date	May 4, 2020
Publication date	Feb 2, 2023
Grant date	—

Abstract

A battery module having a fire-extinguisher, and more particularly to a battery module having a fire-extinguisher, the battery module including a plurality of battery cells stacked in a vertical direction or a horizontal direction and a fire-extinguisher located adjacent to each of the battery cells, wherein the fire-extinguisher includes a fire-extinguishing pack containing a fire-extinguishing material, a piezoelectric element interposed between the battery cell and the fire-extinguishing pack, and at least one breaking unit interposed between the battery cell and the fire-extinguishing pack.

First claim

1 . A battery module comprising:
a plurality of battery cells stacked in a first direction; and a plurality of fire-extineuishers respectively located adjacent to plurality of battery cells, wherein each of the plurality of fire-extinguishers comprises a fire-extinguishing pack containing a fire-extinguishing material, a piezoelectric element interposed between a respective battery cell and the fire-extinguishing pack, and at least one breaking unit interposed between the respective battery cell and the fire-extinguishing pack.

2 . The battery module according to claim 1 , wherein the fire-extinguishing pack is in contact with one surface or opposite surfaces of the respective battery cell.

3 . The battery module according to claim 1 , wherein the piezoelectric element is located at a middle of one surface of the respective battery cell, and
wherein a connection circuit is provided between the piezoelectric element and the breaking unit.

4 . The battery module according to claim 1 , wherein the breaking unit comprises:
a coupler fixed to the respective battery cell or the fire-extinguishing pack; and a blade extending from the coupler, wherein the blade is made of an electroactive polymer.

5 . The battery module according to claim 4 , wherein the breaking unit is located adjacent to an electrode lead of the respective battery cell.

6 . The battery module according to claim 4 , wherein the blade is deformed by a predetermined angle by voltage generated from the piezoelectric element to rupture the fire-extinguishing pack.

7 . The battery module according to claim 4 , wherein the blade is a plurality of blades along a plurality of edges of the coupler.

8 . The battery module according to claim 4 , wherein the blade has a thickness equal to a thickness of the coupler.

9 . The battery module according to claim 4 , wherein the blade has a thickness gradually decreasing with increasing distance from an edge of the coupler.

10 . The battery module according to claim 8 , wherein a recessed portion is formed where the blade and the coupler are connected to each other.

11 . A battery pack comprising the battery module according claim 1 .

12 . The battery module according to claim 9 , wherein a recessed portion is formed where the blade and the coupling portion are connected to each other.

Assignees

• Lg Energy Solution Ltd

Inventors

• Lee Han Young
• Park Jun Soo

Classifications

• H01M10/425

  Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00) · CPC title

• H01M2200/20

  Pressure-sensitive devices · CPC title

• H01M50/673

  Containers for storing liquids; Delivery conduits therefor · CPC title

• H01M10/647

  Prismatic or flat cells, e.g. pouch cells · CPC title

• H01M10/613

  Cooling or keeping cold · CPC title