Tank, battery cell, battery, and electrical device

Patent metadata

Field	Value
Publication number	US-12347894-B2
Application number	US-202217903677-A
Country	US
Kind code	B2
Filing date	Sep 6, 2022
Priority date	Aug 26, 2021
Publication date	Jul 1, 2025
Grant date	Jul 1, 2025

Abstract

A capsule includes two membranes arranged in the capsule and configured to partition an interior of the capsule into a plurality of independent accommodation cavities, and a plurality of fragile structures comprising a first fragile structure, a second fragile structure, and a third fragile structure. A packaging strength of the first fragile structure is greater than a packaging strength of the second fragile structure. The packaging strength of the second fragile structure is greater than a packaging strength of the third fragile structure.

First claim

What is claimed is:

1. A capsule, comprising:
two membranes arranged in the capsule and configured to partition an interior of the capsule into a plurality of independent accommodation cavities, the plurality of independent accommodation cavities comprising a first accommodation cavity, a second accommodation cavity, and a third accommodation cavity; and
a plurality of fragile structures comprising a first fragile structure, a second fragile structure, and a third fragile structure, a packaging strength of the first fragile structure being greater than a packaging strength of the second fragile structure, the packaging strength of the second fragile structure being greater than a packaging strength of the third fragile structure, each of the plurality of independent accommodation cavities corresponding to one of the plurality of fragile structures;
wherein;
along a length direction of the capsule, a first part of a first capsule wall, the first fragile structure, a second part of the first capsule wall, a first part of a second capsule wall, the second fragile structure, a second part of the second capsule wall, a first part of a third capsule wall, the third fragile structure, and a second part of the third capsule wall are disposed on a side of the capsule in sequence;
a thickness of the first capsule wall, a thickness of the second capsule wall, and a thickness of the third capsule wall are greater than a thickness of the first fragile structure and greater than a thickness of each of the two membranes;
the thickness of the first fragile structure is greater than a thickness of the second fragile structure, the thickness of the second fragile structure is greater than a thickness of the third fragile structure; and
the first fragile structure, the second fragile structure, and the third fragile structure correspond to the first accommodation cavity, the second accommodation cavity, and the third accommodation cavity, respectively.

2. A battery cell, comprising:
a housing;
a cell core, accommodated in the housing; and
the capsule according to claim 1 , accommodated in the housing and arranged corresponding to a sidewall of the cell core.

3. The battery cell according to claim 2 , wherein each of the plurality of fragile structures is arranged corresponding to the sidewall of the cell core.

4. The battery cell according to claim 2 , comprising:
a plurality of cell cores;
wherein the capsule is arranged between one of the cell cores and a sidewall of the housing, and/or the capsule is arranged between adjacent ones of the cell cores.

5. The battery cell according to claim 4 , wherein:
the plurality of fragile structures further comprises a fourth fragile structure;
the first fragile structure, the second fragile structure, and the third fragile structure are arranged corresponding to a sidewall of one of the plurality of cell cores; and
the fourth fragile structure is arranged corresponding to a sidewall of another one of the plurality of cell cores adjacent to the one of the plurality of cell cores.

6. The battery cell according to claim 2 , wherein an explosion-proof valve is arranged on the housing, and the capsule is arranged opposite to the explosion-proof valve.

7. The battery cell according to claim 2 , wherein different ones of the plurality of independent accommodation cavities store different substances.

8. The battery cell according to claim 7 , wherein:
the plurality of independent accommodation cavities further comprises a fourth accommodation cavity;
the plurality of fragile structures further comprises a fourth fragile structure corresponding to the fourth accommodation cavity; and
the plurality of independent accommodation cavities store a flame retardant, a gas absorbent, a lithium supplementing agent, and an electrolytic solution, respectively, in descending order of the packaging strengths of the plurality of fragile structures.

9. A battery cell, comprising:
a housing;
a cell core, accommodated in the housing; and
a plurality of capsules, accommodated in the housing and each arranged corresponding to a sidewall of the cell core, and each of the plurality of capsules being the capsule according to claim 1 .

10. The battery cell according to claim 9 , wherein each of the plurality of fragile structures of each of the plurality of capsules is arranged corresponding to the sidewall of the cell core.

11. The battery cell according to claim 9 , comprising:
a plurality of cell cores;
wherein the each of the plurality of capsules is arranged between one of the cell cores and a sidewall of the housing, and/or the each of the plurality of capsules is arranged between adjacent ones of the cell cores.

12. A battery, comprising the battery cell according to claim 9 accommodated in a box.

13. An electrical device, comprising the battery according to claim 12 , the battery being configured to provide electrical energy.

Assignees

• Contemporary Amperex Technology Hong Kong Ltd

Inventors

• Sun Jingxuan
• He Jianfu
• Ye Yonghuang
• Liu Qian
• Sun Xueyang
• Xu Xiaofu

Classifications

• H01M50/143

  Fireproof; Explosion-proof · CPC title

• H01M50/383

  Flame arresting or ignition-preventing means · CPC title

• H01M50/317

  Re-sealable arrangements · CPC title

• H01M2220/20

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

• H01M50/618

  Pressure control · CPC title