Battery pack and device including the same

Patent metadata

Field	Value
Publication number	US-12555877-B2
Application number	US-202218019749-A
Country	US
Kind code	B2
Filing date	Apr 4, 2022
Priority date	Apr 30, 2021
Publication date	Feb 17, 2026
Grant date	Feb 17, 2026

Abstract

A battery pack includes a battery module in which a plurality of battery cells are mounted; and a discharge member electrically connected to the battery module, wherein the discharge member comprises a frame member having an open upper portion and containing a coolant, an upper cover for covering the upper portion of the frame member, and a resistor mounted in the frame member, and wherein both ends of the resistor are exposed to the outside of the discharge member, and are electrically connected to the battery module.

First claim

The invention claimed is:

1 . A battery pack comprising:
a battery module in which a plurality of battery cells are mounted; and a discharge member electrically connected to the battery module, wherein the discharge member comprises:
a frame member having an open upper portion and containing a coolant,
an upper cover for covering the upper portion of the frame member, and
a resistor mounted in the frame member,
wherein ends of the resistor are exposed outside of the discharge member, and are electrically connected to the battery module, and wherein the resistor includes a busbar and an insulating layer, and the insulating layer is formed on an outer surface of the busbar.

2 . The battery pack according to claim 1 , wherein:
the resistor is bent at least twice in the frame member.

3 . The battery pack according to claim 1 , wherein:
the central portion of the resistor is formed with an insulating layer on the outer surface of the busbar, and ends of the resistor are formed with a power connection part in which an outer surface of the busbar is exposed.

4 . The battery pack according to claim 1 , wherein:
the busbar is made of copper (Cu) having a resistance of 3 mΩ or more to 50 mΩ or less.

5 . The battery pack according to claim 1 , wherein:
the upper cover has a first hole and a second hole formed therein, and the ends of the resistor pass through the first hole and the second hole, respectively, and are exposed to the outside.

6 . The battery pack according to claim 5 , wherein:
the first hole and the second hole are respectively formed on sides of the upper cover.

7 . The battery pack according to claim 5 , wherein:
the upper cover is formed with a third hole that can be opened and closed.

8 . The battery pack according to claim 7 , wherein:
the discharge member is configured such that the coolant is injected into the frame member through the third hole.

9 . The battery pack according to claim 8 , wherein:
the discharge member is configured such that water vapor formed by heat generation of the resistor is discharged through the third hole.

10 . The battery pack according to claim 8 , wherein:
the coolant is water.

11 . The battery pack according to claim 1 , wherein:
the discharge member includes a first discharge member and a second discharge member, and the first discharge member and the second discharge member are connected to each other in parallel.

12 . The battery pack according to claim 1 , wherein:
the discharge member includes a first discharge member and a second discharge member, and the first discharge member and the second discharge member are connected to each other in series.

13 . A device comprising the battery pack according to claim 1 .

Assignees

• Lg Energy Solution Ltd

Inventors

• Yoon Doohan

Classifications

• H02J7/70

  characterised by the mechanical construction · CPC title

• H01M50/583

  in response to current, e.g. fuses · CPC title

• H01M50/588

  outside the batteries, e.g. incorrect connections of terminals or busbars · CPC title

• H01M10/667

  the system being an electronic component, e.g. a CPU, an inverter or a capacitor · CPC title

• H01M10/441

  for several batteries or cells simultaneously or sequentially · CPC title