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

Patent metadata

Field	Value
Publication number	US-11996580-B2
Application number	US-202017138818-A
Country	US
Kind code	B2
Filing date	Dec 30, 2020
Priority date	Oct 19, 2020
Publication date	May 28, 2024
Grant date	May 28, 2024

Abstract

A battery, a power consumption device, and a method and device for producing a battery are provided. The battery includes: a battery cell including a 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; and a fire-fighting pipeline configured to accommodate a fire-fighting medium and discharge the fire-fighting medium when the pressure relief mechanism is actuated; where the fire-fighting pipeline is covered with an isolation layer, and the isolation layer is configured to block the contact of gases and the fire-fighting pipeline so as not to generate condensate. In a battery provided by the present application the fire-fighting pipeline is covered with an isolation layer, and the isolation layer may be configured to reduce the influence of the condensate on the battery and improving the safety of the battery.

First claim

What is claimed is:

1. A battery, comprising:
a battery cell comprising a 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; and
a fire-fighting pipeline configured to accommodate a fire-fighting medium and discharge the fire-fighting medium when the pressure relief mechanism is actuated;
wherein the fire-fighting pipeline is covered with an isolation layer, and the isolation layer is configured to block the contact of gases and the fire-fighting pipeline so as not to generate condensate;
wherein the battery further comprises: an insulating dielectric layer disposed between the fire-fighting pipeline and the battery cell, a region of the fire-fighting pipeline corresponding to the insulating dielectric layer is not covered with the isolation layer.

2. The battery according to claim 1 , wherein the battery further comprises:
a bus component comprising a bus unit and a bus connection port;
wherein the bus unit is configured to implement electrical connection of a plurality of battery cells, and the bus connection port is configured to output electric energy of the plurality of battery cells; and
the fire-fighting pipeline is covered with the isolation layer in a region corresponding to the bus connection port.

3. The battery according to claim 2 , wherein the battery further comprises:
a sensing component comprising a sensing unit, a transmission line, and a sensing port;
wherein the sensing unit is configured to sense states of the plurality of battery cells, and the sensing port is configured to output state signals of the plurality of battery cells through the transmission line; and
the fire-fighting pipeline is covered with the isolation layer in a region corresponding to the sensing port.

4. The battery according to claim 3 , wherein the bus connection port and the sensing port of the sensing component are located on a same side of the plurality of battery cells.

5. The battery according to claim 2 , wherein the fire-fighting pipeline comprises a plurality of first portions and at least one second portion, the plurality of first portions are disposed parallel to each other and extend along a stacking direction of the plurality of battery cells, and each second portion of the at least one second portion is connected to end portions of two adjacent first portions among the plurality of first portions;
wherein the plurality of first portions are disposed on a side of a plurality of pressure relief mechanisms of the plurality of battery cells away from an interior of the plurality of battery cells.

6. The battery according to claim 5 , wherein the sensing port of the sensing component of the battery is disposed in a region corresponding to an end portion of the first portion.

7. The battery according to claim 5 , wherein the bus connection port of the bus component is disposed at a side of the sensing port of the sensing component of the battery.

8. The battery according to claim 5 , wherein at least a partial region of the second portion is covered with the isolation layer.

9. The battery according to claim 5 , wherein an orthographic projection of a region, covered with the isolation layer in the second portion, in a first plane and an orthographic projection of the plurality of battery cells in the first plane do not overlap each other, wherein the first plane is a plane perpendicular to a height direction of the plurality of the battery cells.

10. The battery according to claim 5 , wherein a fire-fighting medium inlet or a fire-fighting medium outlet of the fire-fighting pipeline is connected to the first portion, and a connection region of the first portion and the fire-fighting medium inlet or fire-fighting medium outlet is covered with the isolation layer.

11. The battery according to claim 5 , wherein the plurality of first portions are not covered with the isolation layer, and the plurality of first portions are configured to cool the plurality of battery cells.

12. The battery according to claim 3 , wherein the fire-fighting pipeline comprises a plurality of first portions and at least one second portion, the plurality of first portions are disposed parallel to each other and extend along a stacking direction of the plurality of battery cells, and each second portion of the at least one second portion is connected to end portions of two adjacent first portions among the plurality of first portions;
wherein the plurality of first portions are disposed on a side of a plurality of pressure relief mechanisms of the plurality of battery cells away from an interior of the plurality of battery cells.

13. The battery according to claim 12 , wherein the sensing port of the sensing component of the battery is disposed in a region corresponding to an end portion of the first portion.

14. The battery according to claim 13 , wherein the bus connection port of the bus component is disposed at a side of the sensing port of the sensing component of the battery.

15. The battery according to claim 1 , wherein the isolation layer is made of a non-water absorbent material.

16. The battery according to claim 15 , wherein the isolation layer is closed-cell foam, and cells in the closed-cell foam are all closed cells.

17. The battery according to claim 1 , wherein the isolation layer is configured to isolate the fire-fighting pipeline from the bus component.

18. The battery according to claim 1 , wherein a thickness of the isolation layer is greater than 1 mm.

19. A power consumption device, comprising a battery, wherein the battery comprises:
a battery cell comprising a 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; and
a fire-fighting pipeline configured to accommodate a fire-fighting medium and discharge the fire-fighting medium when the pressure relief mechanism is actuated;
wherein the fire-fighting pipeline is covered with an isolation layer, and the isolation layer is configured to block the contact of gases and the fire-fighting pipeline so as not to generate condensate;
wherein the battery further comprises: an insulating dielectric layer disposed between the fire-fighting pipeline and the battery cell, a region of the fire-fighting pipeline corresponding to the insulating dielectric layer is not covered with the isolation layer.

20. The battery according to claim 1 , wherein the battery further comprises:
a bus component comprising a bus unit and a bus connection port;
wherein the bus unit is configured to implement electrical connection of a plurality of battery cells, and the bus connection port is configured to output electric energy of the plurality of battery cells;
the insulating dielectric layer is configured to cover at least part of the area of the bus unit and leave the bus connection port, and the insulating dielectric layer is configured for insulation between the bus unit and the fire-fighting pipeline and configured for insulation between the plurality of battery cells and fire-fighting pipeline; and
the fire-fighting pipeline is covered with the isolation layer in a region corresponding to the bus connection port, and the fire-fighting pipeline is not covered with the isolation layer in a region corresponding to the insulating dielectric layer.

Assignees

• Jiangsu Contemporary Amperex Tech Ltd

Inventors

• Liang Chengdu
• Hong Jiarong
• Yang Haiqi
• Huang Xiaoteng
• Wang Wenli
• Hu Langchao
• Xue Cheng

Classifications

• H01M50/383 Primary

  Flame arresting or ignition-preventing means · CPC title

• A62C3/16

  in electrical installations, e.g. cableways · CPC title

• H01M10/482

  for several batteries or cells simultaneously or sequentially · CPC title

• H01M2200/10

  Temperature sensitive devices · CPC title

• H01M2200/20

  Pressure-sensitive devices · CPC title