Box of battery, battery, power consumption device, and method and device for producing battery

Patent metadata

Field	Value
Publication number	US-12199304-B2
Application number	US-202117549983-A
Country	US
Kind code	B2
Filing date	Dec 14, 2021
Priority date	Mar 22, 2021
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

The present application provides a box of a battery, a battery, and a power consumption device. The box includes: a first component, including a first interface; a second component, configured to connect with the first component to form a chamber, the second component including a second interface, the second interface being configured to be arranged opposite to the first interface; a first locking mechanism, configured to lock the first component and the second component, so that the first interface and the second interface are sealed and connected; the first locking mechanism is configured to be actuated when an internal pressure of a chamber exceeds a preset value, so that the first interface and the second interface break away from a sealed state to relieve the internal pressure of the chamber. The pressure relief ability of the battery can be improved, and the safety of the battery can be enhanced.

First claim

What is claimed is:

1. A box of a battery, comprising:
a first component, comprising a first interface;
a second component, configured to connect with the first component to form a chamber, the second component comprising a second interface, the second interface being configured to be arranged opposite to the first interface;
a first locking mechanism, configured to lock the first component and the second component, so that the first interface and the second interface are sealed and connected;
wherein, the first locking mechanism is configured to be actuated when an internal pressure of the chamber exceeds a preset value, so that the first interface and the second interface break away from a sealed state to relieve the internal pressure of the chamber;
wherein the first locking mechanism comprises an elastic element, and the elastic element is configured to generate elastic deformation when the internal pressure of the chamber exceeds the preset value, so that the first interface and the second interface break away from the sealed state;
wherein the first locking mechanism further comprises a supporting member, one end of the elastic element is configured to abut against one of the first component or the second component, and the other end of the elastic element is configured to abut against the supporting member, to allow the first component or the second component to move relative to the supporting member, when the internal pressure of the chamber exceeds the preset value;
wherein the first component comprises a third interface;
the second component comprises a fourth interface, and the fourth interface is configured to be arranged opposite to the third interface;
the box further comprises:
a second locking mechanism, configured to lock the first component and the second component, so that the third interface and the fourth interface are sealed and connected;
wherein the third interface and the fourth interface maintain in a sealed state, when the internal pressure of the chamber exceeds the preset value, so that the internal pressure of the chamber is relieved through a gap between the first interface and the second interface that break away from the sealed state;
wherein the second locking mechanism comprises a screw, a first nut and a second nut, wherein the first nut is located on a side of the third interface away from the fourth interface and is fixed to one end of the screw, and the second nut is located on a side of the fourth interface away from the third interface;
wherein a first preload applied by the first locking mechanism on the first component or the second component is smaller than a second preload applied by the second locking mechanism on the first component or the second component.

2. The box according to claim 1 , wherein the first locking mechanism further comprises a connecting rod, and one end of the connecting rod is configured to be attached to a same component with the elastic element;
the supporting member is provided with a guide hole, and the other end of the connecting rod is configured to pass through the guide hole, so that the connecting rod moves along an extending direction of the guide hole, when the elastic element is elastically deformed.

3. The box according to claim 2 , wherein the elastic element is configured to be sleeved on the connecting rod.

4. The box according to claim 1 , wherein one end of the supporting member is configured to abut against the elastic element, and the other end of the supporting member is configured to be attached to the other one of the first component and the second component.

5. The box according to claim 1 , wherein
the first component is provided with a first through hole;
the first locking mechanism further comprises: a connecting rod, one end of the connecting rod is configured to be attached to the second component, and the other end of the connecting rod is configured to pass through the first through hole to be attached to the supporting member;
one end of the elastic element is configured to abut against the first component, and the other end of the elastic element is configured to abut against the supporting member.

6. The box according to claim 5 , wherein the second component is provided with a second through hole, and the connecting rod is configured to pass through the first through hole and the second through hole, to connect the first component and the second component.

7. The box according to claim 6 , wherein the supporting member comprises a first supporting member and a second supporting member;
one end of the connecting rod is configured to be attached to the first supporting member, the other end of the connecting rod is configured to be attached to the second supporting member, and the second supporting member is configured to abut against the second component;
one end of the elastic element is configured to abut against the first component, and the other end of the elastic element is configured to abut against the first supporting member; or
wherein the supporting member comprises a first supporting member and a second supporting member;
the elastic element comprises a first elastic element and a second elastic element; wherein,
one end of the connecting rod is configured to be attached to the first supporting member, and the other end of the connecting rod is configured to be attached to the second supporting member;
one end of the first elastic element is configured to abut against the first component, and the other end of the first elastic element is configured to abut against the first supporting member;
one end of the second elastic element is configured to abut against the second component, and the other end of the second elastic element is configured to abut against the second supporting member.

8. The box according to claim 1 , wherein the first locking mechanism further comprises a first abutment member, the elastic element abuts against the first component through the first abutment member, wherein an area where the first abutment member contacts with the first component is larger than an area where the first abutment member contacts with the elastic element; and/or,
the first locking mechanism further comprises a second abutment member, and the elastic element abuts against the second component through the second abutment member, wherein an area where the second abutment member contacts with the second component is larger than an area where the second abutment member contacts with the elastic element.

9. The box according to claim 1 , wherein at least one abutment surface for abutting against the elastic element is provided with a restraint part, and the restraint part is configured to restrain movement of the elastic element perpendicular to an elasticity direction of the elastic element.

10. The box according to claim 9 , wherein the restraint part comprises a recess, and the recess is configured to house an end of the elastic element corresponding to the restraint part; or
wherein the restraint part comprises a protrusion, wherein an end of the elastic element corresponding to the restraint part is sleeved on the protrusion.

11. The box according to claim 1 , wherein the box further comprises a sealing member, and the sealing member is arranged between the first component and the second component, so that the first interface and the second interface are sealed and connected.

12. The box according to claim 1 , wherein one end of the elastic element is configured to be attached to the first component, the other end of the elastic element is configured to be attached to the second component, and the elastic element is configured to be always in

Assignees

• Contemporary Amperex Technology Hong Kong Ltd

Inventors

• Gu Mingguang
• Chen Xiaobo
• Li Yao
• Yue Jinru
• Yang Piaopiao
• Hu Lu
• Li Xianda

Classifications

• H01M50/262

  with fastening means, e.g. locks · CPC title

• H01M2220/20

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

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M2200/20

  Pressure-sensitive devices · CPC title

• H01M50/271

  Lids or covers for the racks or secondary casings · CPC title