Balance valve, battery and power consumption apparatus

Patent metadata

Field	Value
Publication number	US-2025035223-A1
Application number	US-202418910736-A
Country	US
Kind code	A1
Filing date	Oct 9, 2024
Priority date	Aug 31, 2020
Publication date	Jan 30, 2025
Grant date	—

Abstract

A balance valve, a battery, and a power consumption apparatus are provided in the embodiments of the present application. The balance valve includes a body, a breathable membrane and a gas barrier structure, where the body is provided with a ventilation channel; the breathable membrane is arranged at one end of the ventilation channel; and, the gas barrier structure is arranged at the other end of the ventilation channel, and the gas barrier structure is configured to open the ventilation channel when the gas pressures inside and outside the gas barrier structure are unbalanced, so as to achieve the gas pressure balance between the inside and outside of the gas barrier structure. The balance valve is applicable to a battery, which could achieve a balance of gas pressures inside and outside the battery when there is a pressure difference between the inside and outside of the battery.

First claim

What is claimed is:

1 . A balance valve, comprising:
a body, the body being provided with a ventilation channel; a breathable membrane, the breathable membrane being arranged at one end of the ventilation channel, and the breathable membrane being configured to maintain a gas circulation of the ventilation channel; and a gas barrier structure, the gas barrier structure being arranged at an other end of the ventilation channel, and the gas barrier structure being configured to close the ventilation channel when gas pressures inside and outside the gas barrier structure are balanced, while the gas barrier structure being configured to open the ventilation channel when the gas pressures inside and outside the gas barrier structure are unbalanced, so as to achieve a balance of the gas pressure inside and outside the gas barrier structure, wherein the body comprises a valve body and a valve core, the valve core is configured to be movably installed on the valve body, the ventilation channel comprises a first section and a second section communicating with each other, the first section is provided on the valve body, the second section is provided on the valve core, the breathable membrane is fixed to the valve core or valve body, and the gas barrier structure is fixed to the valve core or valve body.

2 . The balance valve according to claim 1 , wherein the gas barrier structure comprises a first barrier member and a second barrier member;
when the gas pressure inside the gas barrier structure is greater than the gas pressure outside, the first barrier member is configured to be able to open unidirectionally towards the outside; when the gas pressure outside the gas barrier structure is greater than the gas pressure inside, the second barrier member is configured to be able to open unidirectionally towards the inside; when the gas pressure outside the gas barrier structure is balanced with the gas pressure inside, the first barrier member and the second barrier member are configured to close the ventilation channel together.

3 . The balance valve according to claim 2 , wherein the gas barrier structure further comprises a base, and the base is provided with a first through hole and a second through hole, the first through hole and the second through hole are both in communication with the ventilation channel;
when the gas pressure inside the gas barrier structure is greater than the gas pressure outside, the first barrier member is configured to open the first through hole; when the gas pressure outside the gas barrier structure is greater than the gas pressure inside, the second barrier member is configured to open the second through hole; when the gas pressure outside the gas barrier structure is balanced with the gas pressure inside, the first barrier member closes the first through hole, and the second barrier member closes the second through hole.

4 . The balance valve according to claim 3 , wherein the first barrier member and the second barrier member are respectively arranged at opposite sides of the base, the first barrier member is configured to block the first through hole and expose the second through hole, and the second barrier member is configured to block the second through hole and expose the first through hole.

5 . The balance valve according to claim 4 , wherein both the first barrier member and the second barrier member are valve structures.

6 . The balance valve according to claim 5 , wherein the thickness of the second barrier member is greater than the thickness of the first barrier member.

7 . The balance valve according to claim 5 , wherein the first barrier member comprises a first fixing portion and a first opening-closing portion that are connected, the second barrier member comprises a second fixing portion and a second opening-closing portion that are connected, the first fixing portion and the second fixing portion are both fixed to the base;
when the gas pressure outside the gas barrier structure is balanced with the gas pressure inside, the first opening-closing portion and the second opening-closing portion are both attached to the base, wherein the first opening-closing portion blocks the first through hole, while the second opening-closing portion blocks the second through hole; when the gas pressure inside the gas barrier structure is greater than the gas pressure outside, the first opening-closing portion is detached from the base to open the first through hole; when the gas pressure outside the gas barrier structure is greater than the gas pressure inside, the second opening-closing portion is detached from the base to open the second through hole.

8 . The balance valve according to claim 7 , wherein the first fixing portion is fixed to the base through at least two fixing points, and/or the second fixing portion is fixed to the base through at least two fixing points.

9 . The balance valve according to claim 8 , wherein the gas barrier structure further comprises two rivets, both of the two rivets being configured to pass through the first fixing portion, the base and the second fixing portion so as to realize a fixation of the first barrier member, the second barrier member and the base.

10 . The balance valve according to claim 3 , wherein a cross-sectional area of the first through hole is greater than a cross-sectional area of the second through hole.

11 . The balance valve according to claim 3 , wherein the base is fixed connection to the ventilation channel.

12 . The balance valve according to claim 1 , wherein the ventilation channel comprises opposite outer end and inner end, the breathable membrane is arranged at the outer end of the ventilation channel, and the gas barrier structure is arranged at the inner end of the ventilation channel.

13 . A battery, comprising a box, a battery cell and a balance valve, wherein the battery cell is arranged in the box, and the balance valve is arranged on the box and comprises:
a body, the body being provided with a ventilation channel; a breathable membrane, the breathable membrane being arranged at one end of the ventilation channel, and the breathable membrane being configured to maintain a gas circulation of the ventilation channel; and a gas barrier structure, the gas barrier structure being arranged at an other end of the ventilation channel, and the gas barrier structure being configured to close the ventilation channel when gas pressures inside and outside the gas barrier structure are balanced, while the gas barrier structure being configured to open the ventilation channel when the gas pressures inside and outside the gas barrier structure are unbalanced, so as to achieve a balance of the gas pressure inside and outside the gas barrier structure; wherein the body comprises a valve body and a valve core, the valve core is configured to be movably installed on the valve body, the ventilation channel comprises a first section and a second section communicating with each other, the first section is provided on the valve body, the second section is provided on the valve core, the breathable membrane is fixed to the valve core or valve body, and the gas barrier structure is fixed to the valve core or valve body.

14 . The battery according to claim 13 , wherein the gas barrier structure comprises a first barrier member and a second barrier member;
when the gas pressure inside the gas barrier structure is greater than the gas pressure outside, the first barrier member is configured to be able to open unidirectionally towards the outside; when the gas pressure outside the gas barrier structure is greater than the gas pr

Assignees

• Contemporary Amperex Technology Hong Kong Ltd

Inventors

• Zhu Decai
• Wu Ziqiang
• Hu Langchao
• Chen Binbin
• Wang Peng
• Ji Jinqing

Classifications

• H01M50/325 Primary

  comprising deformable valve members, e.g. elastic or flexible valve members · CPC title

• H01M50/20

  Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders (structural combination of accumulators with charging apparatus H01M10/46) · CPC title

• H01M6/02

  Details (of electrodes H01M4/00; of non-active parts H01M50/00) · CPC title

• H01M50/3425

  in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title