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

Patent metadata

Field	Value
Publication number	US-12036877-B2
Application number	US-202017138761-A
Country	US
Kind code	B2
Filing date	Dec 30, 2020
Priority date	Oct 19, 2020
Publication date	Jul 16, 2024
Grant date	Jul 16, 2024

Abstract

Embodiments of the present application relates to a battery, a power consumption device, and a method and device for producing a battery. The battery includes: a battery cell, the battery cell including a pressure relief mechanism; a fire-fighting pipeline configured to accommodate a fire-fighting medium, the fire-fighting pipeline including a first region corresponding to the pressure relief mechanism and a second region located at a periphery of the first region, the first region being configured to be damaged when the pressure relief mechanism is actuated, such that the fire-fighting medium is discharged; and a protective component disposed between the fire-fighting pipeline and the battery cell and configured to protect the second region. The battery, the power consumption device, and the method and device for producing the battery in the embodiments of the present application could improve the safety performance of the battery.

First claim

What is claimed is:

1. A battery, comprising:
a battery cell, the battery cell comprising a pressure relief mechanism, the pressure relief mechanism configured to be actuated when an internal pressure or temperature of the battery cell reaches a threshold, to relieve the internal pressure or temperature, the pressure relief mechanism is disposed on a wall of the battery cell;
a fire-fighting pipeline configured to accommodate a fire-fighting medium, the fire-fighting pipeline is arranged on a side of the pressure relief mechanism away from an interior of the battery cell, the fire-fighting pipeline comprising a first region corresponding to the pressure relief mechanism and a second region located at a periphery of the first region, the first region being configured to be damaged when the pressure relief mechanism is actuated, such that the fire- fighting medium is discharged, and the second region being configured to remain intact when the pressure relief mechanism is actuated, such that the fire-fighting medium is capable of flowing from the second region to the first region; and
a protective component disposed between the fire-fighting pipeline and the battery cell and configured to protect the second region ;
wherein the protective component comprises a weakened zone and a protective zone, the protective zone is configured to protect the second region of the fire-fighting pipeline when the pressure relief mechanism is actuated, the weakened zone is disposed opposite to the pressure relief mechanism, and the weakened zone is configured such that emissions from the battery cell are capable of passing through the weakened zone to damage the first region when the pressure relief mechanism is actuated;
wherein a first recess is provided on the protective component, the fire-fighting pipeline is disposed in the first recess, and the first recess is configured to collect the fire-fighting medium used to flow into the battery cell when the pressure relief mechanism is actuated;
wherein the weakened zone is provided in a region on a bottom wall of the first recess corresponding to the first region;
wherein a melting point of a material of the protective zone is greater than a melting point of a material of the fire-fighting pipeline; and
a melting point of a material of the protective zone is greater than or equal to 800° C.

2. The battery according to claim 1 , wherein a width of the weakened zone in a first direction is greater than or equal to a width of the bottom wall of the first recess in the first direction, and the first direction is perpendicular to an axis of the fire-fighting pipeline in the first region.

3. The battery according to claim 1 , wherein a width of the weakened zone in a first direction is greater than a diameter of the fire-fighting pipeline, and the first direction is perpendicular to an axis of the fire-fighting pipeline in the first region.

4. The battery according to claim 1 , wherein an orthographic projection of the weakened zone on a first plane covers an orthographic projection of the pressure relief mechanism on the first plane, and the first plane is parallel to a surface of a wall where the pressure relief mechanism of the battery cell is located facing toward an interior of the battery cell.

5. The battery according to claim 1 , wherein the fire-fighting pipeline is disposed on one side of the pressure relief mechanism away from an interior of the battery cell;
the pressure relief mechanism is an axisymmetric structure, and an axis of the fire-fighting pipeline in the first region is perpendicular to and lies in a same plane as an axis of the pressure relief mechanism.

6. The battery according to claim 1 , wherein a material of the protective zone is mica or quartz.

7. The battery according to claim 1 , wherein the battery further comprises:
a bus component configured to implement electrical connection of a plurality of battery cells; and
an insulating protective layer configured to cover the bus component to prevent emissions from the battery cell from short-circuiting the plurality of the battery cells when the pressure relief mechanism is actuated, and a thickness of the insulating protective layer is greater than 0.1 mm;
a melting point of a material of the insulating protective layer is greater than or equal to 800° C.; and/or
a material of the insulating protective layer is mica or quartz.

8. The battery according to claim 1 , wherein the battery further comprises:
an insulating layer disposed between the pressure relief mechanism and the protective component.

9. The battery according to claim 8 , wherein the insulating layer is configured to wrap a bus component of the battery, and an insulating protective layer is provided in a region on a surface of the insulating layer corresponding to the bus component,
wherein the bus component is configured to implement electrical connection of a plurality of battery cells, and the insulating protective layer is configured to cover the bus component to prevent emissions from the battery cell from short-circuiting the plurality of the battery cells when the pressure relief mechanism is actuated.

10. The battery according to claim 9 , wherein the protective component and the insulating protective layer are an integrally formed structure.

11. The battery according to claim 10 , wherein a second recess is provided in a region of the insulating layer corresponding to the pressure relief mechanism, and the protective component is disposed in the second recess.

12. The battery according to claim 11 , wherein a first recess on the protective component is disposed in the second recess, the fire-fighting pipeline is disposed in the first recess, and the first recess is configured to collect the fire-fighting medium used to flow into the battery cell when the pressure relief mechanism is actuated.

13. The battery according to claim 12 , wherein a fixing member is provided in the second recess, and the fixing member is configured to fix the protective component and the fire-fighting pipeline.

14. The battery according to claim 8 , wherein a melting point of a material of the insulating layer is lower than a melting point of the protective component, and the insulating layer is melted by emissions from the battery cell when the pressure relief mechanism is actuated.

15. A power consumption device, comprising the battery according to claim 1 , wherein the battery is configured to provide electrical energy.

Assignees

• Jiangsu Contemporary Amperex Tech Ltd

Inventors

• Zeng Yuqun
• Sun Zhanyu
• Huang Xiaoteng
• Yang Haiqi
• Wang Wenli
• Hong Jiarong
• Hu Langchao

Classifications

• A62C3/07

  in vehicles, e.g. in road vehicles · CPC title

• B60L58/26

  by cooling · CPC title

• B60L58/27

  by heating · CPC title

• Y02T10/70

  Energy storage systems for electromobility, e.g. batteries · CPC title

• B60L2240/545

  Temperature · CPC title