Battery module, battery rack, and power storage device

Patent metadata

Field	Value
Publication number	US-12438230-B2
Application number	US-202117908755-A
Country	US
Kind code	B2
Filing date	Sep 13, 2021
Priority date	Oct 8, 2020
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

A battery module prevents a fire from increasing in size and prevents electrical short circuits due to dew condensation in case of a fire. A battery module for achieving the object as described above includes a cell assembly having a plurality of battery cells, a front cover including an upper wall, a lower wall, a left wall, and a right wall, which form an inner space, and a module case accommodating the cell assembly in the inner space, coupled to the front cover, and provided with a cover portion that has a portion protruding to face at least one of the upper wall, the lower wall, the left wall, and the right wall.

First claim

What is claimed is:

1. A battery module comprising:
a cell assembly having a plurality of battery cells;
a front cover comprising an upper wall, a lower wall, a left wall, and a right wall, which form an inner space; and
a module case accommodating the cell assembly within an inner space of the module case, coupled to the front cover, and comprising a cover portion that has a portion protruding to face at least one of the upper wall, the lower wall, the left wall, and the right wall of the front cover,
wherein the front cover further comprises:
an upper duct formed on an upper end of the front cover and configured to introduce outside air into the module case; and
a lower duct formed on a lower end of the front cover and configured to introduce outside air into the module case, and
wherein the module case further comprises:
an upper plate arranged above the cell assembly and comprising a first cover portion extending from an end portion of the upper plate to face an inner surface of the upper duct; and
a lower plate arranged below the cell assembly, configured to be coupled to the upper plate, and comprising a second cover portion extending from an end portion of the lower plate to face an inner surface of the lower duct.

2. The battery module of claim 1 , wherein the first cover portion comprises a main body portion in contact with an upper surface of the upper duct, and a bent portion which is bent and extends from the main body portion, and
wherein the second cover portion comprises a main body portion so as to be in contact with a lower surface of the lower duct, and a bent portion which is bent and extends from the main body portion.

3. The battery module of claim 1 , further comprising:
a first insulating plate having electrical insulation, arranged between the upper plate and the cell assembly, and extending to cover an upper surface of the cell assembly; and
a second insulating plate having electrical insulation, arranged between the lower plate and the cell assembly, and extending to cover a lower surface of the cell assembly.

4. The battery module of claim 3 , wherein the first insulating plate comprises a first protection portion extending from an end portion of the first insulating plate to face the inner surface of the upper duct, and
wherein the second insulating plate comprises a second protection portion extending from an end portion of the second insulating plate to face the inner surface of the lower duct.

5. The battery module of claim 4 , wherein each of the first protection portion and the second protection portion comprises a sealing member configured to expand in volume at a predetermined temperature or more to seal the duct.

6. The battery module of claim 3 , wherein each of the first insulating plate and the second insulating plate comprises a partition wall portion that is bent from an outer peripheral end portion toward the cell assembly and extends along the outer peripheral end portion.

7. The battery module of claim 3 , wherein the second insulating plate has an at least partially inclined surface.

8. The battery module of claim 7 , further comprising a discharge port configured to discharge a fluid flowing along the inclined surface to outside.

9. A battery rack comprising at least one battery module according to claim 1 .

10. A power storage device comprising at least one battery module according to claim 1 .

Assignees

• Lg Energy Solution Ltd

Inventors

• Yoo Jae-Min
• Kim Seung-Joon
• Shin Eun-Gyu
• Cho Young-Bum

Classifications

• H01M50/367 Primary

  Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• A62C2/06

  Physical fire-barriers · CPC title

• H01M2220/10

  Batteries in stationary systems, e.g. emergency power source in plant · CPC title