Battery, power consumption device, method and device for producing battery

Patent metadata

Field	Value
Publication number	US-11489231-B2
Application number	US-202117550011-A
Country	US
Kind code	B2
Filing date	Dec 14, 2021
Priority date	Mar 31, 2021
Publication date	Nov 1, 2022
Grant date	Nov 1, 2022

Abstract

Embodiments of the present application provide a battery, a power consumption device, a method and a device for producing the battery. The battery includes: a battery cell, including a pressure relief mechanism, wherein the pressure relief mechanism is disposed on a first wall of the battery cell; a thermal management component, wherein a first surface of the thermal management component is attached to the first wall, and the thermal management component is provided with a pressure relief hole opposite to the pressure relief mechanism; and a baffle configured to cover a part of the pressure relief hole, so that when the pressure relief mechanism is actuated, a discharge direction of the emissions entering the pressure relief hole is changed. The battery, the power consumption device, the method and the device for producing the battery provided in the embodiments of the present application can enhance safety of batteries.

First claim

What is claimed is:

1. A battery, comprising:
a battery cell comprising a pressure relief mechanism, wherein the pressure relief mechanism is disposed on a first wall of the battery cell, and the pressure relief mechanism is configured to be actuated when an internal pressure or temperature of the battery cell reaches a threshold, to relieve the internal pressure;
a thermal management component configured to accommodate a fluid to adjust a temperature of the battery cell, wherein a first surface of the thermal management component is attached to the first wall, and the thermal management component is provided with a pressure relief hole opposite to the pressure relief mechanism, so that when the pressure relief mechanism is actuated, emissions discharged from the battery cell can pass through the thermal management component by the pressure relief hole to be discharged; and
a baffle configured to cover a part of the pressure relief hole, so that when the pressure relief mechanism is actuated, a discharge direction of the emissions entering the pressure relief hole is changed;
wherein the battery further comprises:
an electrical chamber configured to accommodate a plurality of battery cells, and
a collection chamber configured to collect the emissions discharged from the battery cell when the pressure relief mechanism is actuated; and
wherein the thermal management component is configured to isolate the electrical chamber from the collection chamber.

2. The battery according to claim 1 , wherein a maximum distance between the baffle and the first wall is greater than a minimum distance from the first surface to the first wall.

3. The battery according to claim 1 , wherein the baffle is inclined with respect to an axis of the pressure relief hole, and the baffle gradually approaches the axis of the pressure relief hole along a direction away from the first wall, so that when the pressure relief mechanism is actuated, the emissions can impact toward a hole wall of the pressure relief hole.

4. The battery according to claim 3 , wherein a value of an angle between the baffle and the axis of the pressure relief hole ranges from 20° to 40°.

5. The battery according to claim 1 , wherein the pressure relief hole is surrounded by two baffles arranged opposite to each other.

6. The battery according to claim 1 , wherein a ratio of an area of the baffle covering the pressure relief hole to an area of the pressure relief hole is not less than 0.5 and not more than 0.8.

7. The battery according to claim 1 , wherein a surface roughness of the baffle is less than or equal to 0.1 μm.

8. The battery according to claim 1 , wherein the baffle is disposed on a second surface of the thermal management component, and the second surface is opposite to the first surface or the second surface is a hole wall of the pressure relief hole.

9. The battery according to claim 1 , wherein
the collection chamber is further configured to collect emissions from the thermal management component when the pressure relief mechanism is actuated.

10. The battery according to claim 9 , wherein the battery further comprises:
a protective member, the protective member is configured to protect the thermal management component, and the protective member and the thermal management component form the collection chamber.

11. The battery according to claim 10 , wherein the protective member comprises a bottom wall and a plurality of side walls to form a hollow structure with an opening at one end, and the thermal management component covers the opening to form the collection chamber.

12. The battery according to claim 11 , wherein an end of the baffle away from the first wall abuts against the bottom wall of the protective member along an axis of the pressure relief hole.

13. The battery according to claim 1 , wherein the thermal management component is configured to be capable of being damaged, when the pressure relief mechanism is actuated, by the emissions whose discharge direction has been changed, so that the fluid is discharged from an interior of the thermal management component.

14. The battery according to claim 13 , wherein the thermal management component is provided with a temperature-sensitive material, the temperature-sensitive material is configured to be melted by the emissions when the pressure relief mechanism is actuated, so that the fluid is discharged from the interior of the thermal management component.

15. The battery according to claim 14 , wherein the temperature-sensitive material is disposed on an area of the thermal management component facing the emissions from the battery cell.

16. A power consumption device, comprising: a battery, and the battery being configured to supply electrical energy to the power consumption device, the battery comprising:
a battery cell comprising a pressure relief mechanism, wherein the pressure relief mechanism is disposed on a first wall of the battery cell, and the pressure relief mechanism is configured to be actuated when an internal pressure or temperature of the battery cell reaches a threshold, to relieve the internal pressure;
a thermal management component configured to accommodate a fluid to adjust a temperature of the battery cell, wherein a first surface of the thermal management component is attached to the first wall, and the thermal management component is provided with a pressure relief hole opposite to the pressure relief mechanism, so that when the pressure relief mechanism is actuated, emissions discharged from the battery cell can pass through the thermal management component by the pressure relief hole to be discharged; and
a baffle configured to cover a part of the pressure relief hole, so that when the pressure relief mechanism is actuated, a discharge direction of the emissions entering the pressure relief hole is changed;
wherein the battery further comprises:
an electrical chamber configured to accommodate a plurality of battery cells, and
a collection chamber configured to collect the emissions discharged from the battery cell when the pressure relief mechanism is actuated; and
wherein the thermal management component is configured to isolate the electrical chamber from the collection chamber.

17. The power consumption device according to claim 16 , wherein a maximum distance between the baffle and the first wall is greater than a minimum distance from the first surface to the first wall.

18. A method for producing a battery, comprising:
providing a battery cell, wherein the battery cell comprises a pressure relief mechanism, the pressure relief mechanism is disposed on a first wall of the battery cell, and the pressure relief mechanism is configured to be actuated when an internal pressure or temperature of the battery cell reaches a threshold, to relieve the internal pressure;
providing a thermal management component, wherein the thermal management component is configured to accommodate a fluid to adjust a temperature of the battery cell, a first surface of the thermal management component is attached to the first wall, and the thermal management component is provided with a pressure relief hole opposite to the pressure relief mechanism, so that when the pressure relief mechanism is actuated, emissions discharged from the battery cell can pass through the thermal management component by the pressure relief hole to be discharged; and
providing a baffle, the baffle being configured to cover a part of the pressure relief hole, so that when the pressure relief mechanism is actuated, a discharge direction of the emi

Assignees

• Contemporary Amperex Technology Co Ltd

Inventors

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

Classifications

• H01M50/375 Primary

  Vent means sensitive to or responsive to temperature · 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

• H01M10/6556 Primary

  Solid parts with flow channel passages or pipes for heat exchange (closed pipes H01M10/6552) · CPC title

• H01M10/625

  Vehicles · CPC title

• H01M10/613 Primary

  Cooling or keeping cold · CPC title