Battery and electric apparatus

Patent metadata

Field	Value
Publication number	US-12567647-B2
Application number	US-202519295673-A
Country	US
Kind code	B2
Filing date	Aug 10, 2025
Priority date	Jun 7, 2023
Publication date	Mar 3, 2026
Grant date	Mar 3, 2026

Abstract

A battery and an electric apparatus are disclosed. The battery includes a box, a battery module disposed within the box, and a pressure relief channel. The battery module includes at least one battery cell, each equipped with a first pressure relief mechanism. The box includes a second pressure relief mechanism. The pressure relief channel connects the first pressure relief mechanism of at least one battery cell to the second pressure relief mechanism. Upon actuation, the first pressure relief mechanism releases emissions from inside the battery cell into the pressure relief channel. The pressure relief channel guides the emissions to the second pressure relief mechanism, which, when actuated, discharges the emissions to the exterior of the box. This structure enables the reduction of internal temperature and pressure in the box during abnormal conditions, helping reduce the risk of severe damage and enhancing the operational safety and reliability of the battery.

First claim

What is claimed is:

1 . A battery comprising:
a box; a battery module located inside the box, wherein the battery module comprises at least one battery cell, each battery cell being provided with a first pressure relief mechanism, and the box having a second pressure relief mechanism; and a pressure relief channel, wherein the pressure relief channel connects the first pressure relief mechanism of at least one battery cell and the second pressure relief mechanism, the first pressure relief mechanism is configured to release emissions generated inside the battery cell into the pressure relief channel when actuated; the pressure relief channel is configured to guide the emissions to move to the second pressure relief mechanism; and the second pressure relief mechanism is configured to release the emissions from the pressure relief channel to the outside of the box when actuated, wherein a pressure relief area of the second pressure relief mechanism is S, and a length of a shortest discharge path formed between the first pressure relief mechanism of at least one battery cell and the second pressure relief mechanism is L; and

0.25

dm

-
1

≤

L
S

<

250
⁢

dm

-
1

,

wherein a unit of S is dm 2 , and a unit of L is dm.

2 . The battery according to claim 1 , wherein a volumetric energy density of the battery is E; and

200
⁢

(

Wh
/
L

)

/

dm
2

<

E
S

<

6100
⁢

(

Wh
/
L

)

/

dm
2

,

wherein a unit of E is Wh/L.

3 . The battery according to claim 1 , wherein a volumetric energy density of the battery is E; and

1.06
×

10
2

⁢

(

Wh
/L

)

/
dm

≤

E
×
L

S

≤

1
.
7

⁢
6
×
1
⁢

0
5

⁢

(

Wh
/L

)

/
dm

,

wherein a unit of E is Wh/L.

4 . The battery according to claim 1 , wherein the pressure relief channel further comprises a first sub-pressure relief channel configured to be connected to the second pressure relief mechanism, and the battery further comprises a partition, wherein the partition is configured to separate the battery module from the first sub-pressure relief channel, the partition is provided with a plurality of first ventilatable structures, and each first ventilatable structure connects the first pressure relief mechanism of at least one battery cell and the first sub-pressure relief channel.

5 . The battery according to claim 4 , wherein the pressure relief channel comprises at least two first sub-pressure relief channels, each first sub-pressure relief channel connects the first ventilatable structures corresponding to different battery cells, and the first sub-pressure relief channels are separated by spacing elements.

6 . The battery according to claim 5 , wherein
the pressure relief channel further comprises a communication channel, a wall surface of the partition and an inner wall surface of the box enclose the communication channel, and each first sub-pressure relief channel is connected to the second pressure relief mechanism through the communication channel.

7 . The battery according to claim 6 , wherein the battery module comprises at least one row of battery cells, each row of battery cells comprises at least one battery cell, each row of battery cells is correspondingly provided with at least one first sub-pressure relief channel, each first sub-pressure relief channel extends along an arrangement direction of the corresponding row of battery cells; and each first ventilatable structure corresponding to each row of battery cells is connected to the corresponding first sub-pressure relief channel.

8 . The battery according to claim 7 , wherein the second pressure relief mechanism is located on a side of an end portion of the battery module along an extension direction of the first sub-pressure relief channel.

9 . The battery according to claim 8 , wherein the communication channel is an annular channel, and the annular channel is arranged around the partition.

10 . The battery according to claim 9 , wherein an end plate is provided at each of two ends of at least one row of battery cells, and the end plates are inserted into the annular channel and sealingly connected to an inner wall surface of the box; and
the pressure relief channel further comprises a second sub-pressure relief channel, wherein the second sub-pressure relief channel intersects with the first sub-pressure relief channel, and the second sub-pressure relief channel is configured to connect the corresponding first sub-pressure relief channel and the annular channel.

11 . The battery according to claim 10 , wherein the end plate is provided at each of two ends of each row of battery cells, and each first sub-pressure relief channel is in co

Assignees

• Contemporary Amperex Technology Co Ltd

Inventors

• Wu Kai
• Ke Jianhuang
• Li Yao

Classifications

• H01M50/207

  characterised by their shape · CPC title

• H01M50/383

  Flame arresting or ignition-preventing means · CPC title

• H01M50/358

  External gas exhaust passages located on the battery cover or case · CPC title

• H01M50/367 Primary

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

• H01M10/655 Primary

  Solid structures for heat exchange or heat conduction · CPC title