Battery assemble and assembling method of the same

Patent metadata

Field	Value
Publication number	US-2025349957-A1
Application number	US-202519201922-A
Country	US
Kind code	A1
Filing date	May 8, 2025
Priority date	May 8, 2024
Publication date	Nov 13, 2025
Grant date	—

Abstract

The present disclosure relates to a battery assembly comprising: a plurality of battery cells stacked and arranged in a predetermined stacking direction; an accommodation case housing the plurality of battery cells; an insertion space formed between the plurality of battery cells and the accommodation case along the stacking direction; and a thermal delay assembly located in the insertion space, the thermal delay assembly including: a fire-extinguishing member; and a columnar housing member housing the fire-extinguishing members therein and extending along a height direction of the accommodation case; and an assembly method thereof.

First claim

What is claimed is:

1 . A battery assembly comprising:
a plurality of battery cells stacked and arranged in a stacking direction; an accommodation case for accommodating the plurality of battery cells; an insertion space formed between the plurality of battery cells and the accommodation case along the stacking direction; and a thermal delay assembly located in the insertion space; wherein the thermal delay assembly comprises a fire-extinguishing member; and a housing member for receiving the fire-extinguishing member therein.

2 . The battery assembly according to claim 1 , wherein the fire-extinguishing member starts to generate a fire-extinguishing gas at a predetermined first temperature,
the housing member begins to melt at a predetermined second temperature.

3 . The battery assembly according to claim 2 , wherein the first temperature is higher than or equal to the second temperature.

4 . The battery assembly according to claim 2 , wherein the fire-extinguishing member comprising:
one or more of a potassium compound, a phosphoric acid compound, or any combination thereof, which are pyrolyzed at the first temperature to generate the fire-extinguishing gas.

5 . The battery assembly according to claim 1 , wherein the housing member further comprises a fire-resistant member having a plurality of bead shapes including a fire-resistant material therein.

6 . The battery assembly according to claim 5 , wherein the fire-extinguishing member has a plurality of bead shapes.

7 . The battery assembly according to claim 6 , wherein the fire-resistant member and the fire-extinguishing member respectively are provided in a plurality, mixed with each other, and accommodated in the housing member.

8 . The battery assembly according to claim 5 , wherein the fire-resistant material includes silicon dioxide (SiO 2 ).

9 . The battery assembly according to claim 1 , wherein one end of at least one of both ends of the housing member is a tapered.

10 . The battery assembly according to claim 1 , wherein the housing member comprises:
a body portion having a pipe shape and extending along a height direction of the accommodation case; a first end portion coupled to an upper side of the body portion and closing one of both open ends of the body portion; and a second end portion coupled to a lower side of the body portion and closing the opened other end; wherein the first end portion has a tapered shape in the direction away from the body portion.

11 . The battery assembly according to claim 10 , wherein the second end portion comprises an end face arranged in parallel with the bottom surface of the accommodation case.

12 . The battery assembly according to claim 1 , wherein the accommodation case comprises:
a receiving body including an opened upper surface, and receiving the plurality of battery cells through the opened upper surface; and a receiving cover coupled to the receiving body, and covering the opened upper surface; wherein one end of both ends of the housing member that is closer to the receiving cover than the receiving body is tapered.

13 . The battery assembly according to claim 1 , wherein a length of the housing member along a height direction of the accommodation case is longer than a length of the housing member along the stacking direction of the accommodation case.

14 . The battery assembly according to claim 1 , wherein a maximum length of the thermal delay assembly along the stacking direction is less than or equal to a thickness of any one of the plurality of battery cells.

15 . The battery assembly according to claim 1 , further include a busbar electrically connected to the plurality of battery cells,
wherein the insertion space is located between the busbar and the plurality of battery cells.

16 . The battery assembly according to claim 15 , wherein the insertion space is located outside the plurality of battery cells and is separated into a plurality of separation spaces formed by tab portions of the adjacent battery cells and the busbar,
the thermal delay assembly is provided in a plurality, and is inserted into at least a part of a plurality of separation spaces.

17 . An assembling method comprising:
stacking a plurality of battery cells in a predetermined stacking direction; coupling the plurality of stacked battery cells to a receiving cover; inserting a thermal delay assembly into an insertion space, the thermal delay assembly comprising a fire-resistant member having a plurality of bead shapes, a fire-extinguishing member having a plurality of bead shapes, and a housing member, and the housing member that accommodates the fire-resistant member and the fire-extinguishing member; and coupling a receiving body, which is coupled to the receiving cover and forms an accommodation case, to the receiving cover, wherein the accommodation case houses the plurality of battery cells, the insertion space forms between the plurality of battery cells and the accommodation case along the stacking direction, the thermal delay assembly is located in the insertion space, the fire-resistant member includes a fire-resistant material therein, the fire-extinguishing member starts to generate a fire-extinguishing gas at a predetermined first temperature, the housing member extends along a height direction of the accommodation case.

18 . The assembling method according to claim 17 , further comprises:
prior to the step of inserting the thermal delay assembly into the insertion space, a first positioning step of positioning the plurality of stacked battery cells after being coupled to the receiving cover.

19 . The assembling method according to claim 18 , wherein the step of coupling the receiving body to the receiving cover comprises:
after the first positioning step, the plurality of stacked battery cells and the receiving cover couple with the receiving body.

20 . The assembling method according to claim 18 , further comprising:
after coupling the receiving body to the receiving cover, a second positioning step of positioning the accommodation case.

Assignees

• Sk On Co Ltd

Inventors

• Hwang Won Gab
• Na Chae Won
• Lee Gang U
• Han Kyu Hyun

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• A62C99/0018

  using gases or vapours that do not support combustion, e.g. steam, carbon dioxide · CPC title

• H01M50/471

  Spacing elements inside cells other than separators, membranes or diaphragms (for preventing incorrect contact inside or outside batteries H01M50/584); Manufacturing processes thereof · CPC title

• H01M50/24 Primary

  adapted for protecting batteries from their environment, e.g. from corrosion (thermal insulation H01M10/658) · CPC title

• A62C3/16 Primary

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