Battery, electric apparatus, and method and apparatus for manufacturing battery

Patent metadata

Field	Value
Publication number	US-12463288-B2
Application number	US-202217842555-A
Country	US
Kind code	B2
Filing date	Jun 16, 2022
Priority date	Oct 19, 2020
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

This application relates to a battery, an electric apparatus, and a method and an apparatus for manufacturing a battery. The battery includes a plurality of battery cells and an insulation part. The plurality of battery cells are electrically connected by a busbar; and the battery cell includes a pressure relief mechanism, and the pressure relief mechanism is configured to be actuated when internal pressure or temperature of the battery cell reaches a threshold, to release the internal pressure. The insulation part is configured to cover the busbar, to prevent emissions from the battery cell from causing short circuit of at least one battery cell when the pressure relief mechanism is actuated.

First claim

What is claimed is:

1. A battery, comprising:
a plurality of battery cells electrically connected by a busbar, one battery cell of the plurality of battery cells comprising an electrode terminal and a pressure relief mechanism, and the pressure relief mechanism being configured to be actuated when internal pressure or temperature of the one battery cell reaches a threshold, to release the internal pressure;
an insulation part, configured to cover the busbar to prevent emissions from the one battery cell from causing a short circuit of at least one battery cell of the plurality of battery cells when the pressure relief mechanism is actuated; and
an isolation part configured to mount the busbar, and comprising an avoidance region corresponding to the electrode terminal and an avoidance hole corresponding to the pressure relief mechanism, the avoidance region being configured to expose at least part of the busbar, and the avoidance hole and the avoidance region being spaced apart from each other on the isolation part.

2. The battery according to claim 1 , wherein the insulation part is one of a plurality of the insulation parts of the battery, the busbar is one of a plurality of busbars of the battery, and each of the plurality of insulation parts covers at least one of the plurality of busbars.

3. The battery according to claim 2 , wherein at least one of the plurality of insulation parts is configured to cover two or more of the plurality of busbars located on a side having the pressure relief mechanism.

4. The battery according to claim 1 , wherein:
two or more of the plurality of battery cells are stacked to form a battery module of a plurality of battery modules; and
the insulation part is configured to cover the busbar located on adjacent battery modules of the plurality of battery modules.

5. The battery according to claim 1 , wherein a thickness of the insulation part is 0.5 mm to 3 mm.

6. The battery according to claim 1 , wherein the battery includes a plurality of the insulation parts and the busbars, each insulation part covers at least one busbar, and a thickness of an insulation part is 0.5 mm to 3 mm.

7. The battery according to claim 1 , further comprising a fire protection pipeline, configured to accommodate a fire protection medium, wherein the fire protection pipeline is configured to discharge the fire protection medium to the one battery cell when the pressure relief mechanism is actuated, and the insulation part is configured to prevent the fire protection medium from causing the short circuit of the at least one battery cell of the plurality of battery cells when the pressure relief mechanism is actuated.

8. The battery according to claim 2 , further comprising a fire protection pipeline, configured to accommodate a fire protection medium, wherein the fire protection pipeline is configured to discharge the fire protection medium to the one battery cell when the pressure relief mechanism is actuated, and the insulation part is configured to prevent the fire protection medium from causing the short circuit of the at least one battery cell of the plurality of battery cells when the pressure relief mechanism is actuated.

9. The battery according to claim 7 , wherein the fire protection pipeline comprises a first region corresponding to the pressure relief mechanism and a second region located on a periphery of the first region; the first region is configured to be broken when the pressure relief mechanism is actuated, to discharge the fire protection medium; and the second region is configured to remain intact when the pressure relief mechanism is actuated, to allow the fire protection medium to flow from the second region to the first region.

10. The battery according to claim 9 , further comprising a protection part, disposed between the fire protection pipeline and the one battery cell to protect the second region.

11. The battery according to claim 10 , wherein the protection part comprises a third region and a fourth region, the third region is configured to protect the second region of the fire protection pipeline when the pressure relief mechanism is actuated, and the fourth region is configured to allow the emissions from the one battery cell to pass through the fourth region to break the first region when the pressure relief mechanism is actuated.

12. The battery according to claim 11 , wherein the protection part is configured to form a first groove for accommodating the fire protection pipeline, the first groove is configured to collect, when the pressure relief mechanism is actuated, the fire protection medium flowing into the one battery cell.

13. The battery according to claim 12 , wherein the fourth region is arranged on a region that is of a bottom wall of the first groove and that corresponding to the first region.

14. The battery according to claim 1 , wherein a second groove is provided on the isolation part, and the protection part is disposed in the second groove.

15. An electric apparatus, wherein the electric apparatus is configured to receive power supplied by the battery according to claim 1 .

16. A method for manufacturing a battery, comprising:
providing a plurality of battery cells, wherein one battery cell of the plurality of battery cells comprises a pressure relief mechanism and an electrode terminal, and the pressure relief mechanism is configured to be actuated when internal pressure or temperature of the one battery cell reaches a threshold, to release the internal pressure;
electrically connecting the plurality of battery cells by using a busbar; and
covering the busbar with an insulation part, to prevent emissions from the one battery cell from causing a short circuit of at least one battery cell of the plurality of battery cells when the pressure relief mechanism is actuated;
wherein the battery further comprises an isolation part, the isolation part is configured to mount the busbar, and the isolation part comprises an avoidance region corresponding to the electrode terminal and an avoidance hole corresponding to the pressure relief mechanism, the avoidance region is configured to expose at least part of the busbar, and the avoidance hole and the avoidance region are spaced apart from each other on the isolation part.

17. An apparatus for manufacturing a battery, comprising:
a first apparatus, configured to provide a plurality of battery cells, wherein one battery cell of the plurality of battery cells comprises a pressure relief mechanism and an electrode terminal, and the pressure relief mechanism is configured to be actuated when internal pressure or temperature of the one battery cell reaches a threshold, to release the internal pressure;
a second apparatus, configured to electrically connect the plurality of battery cells by using a busbar; and
a third apparatus, configured to cover the busbar with an insulation part, to prevent emissions from the one battery cell from causing a short circuit of at least one battery cell of the plurality of battery cells when the pressure relief mechanism is actuated;
wherein the battery further comprises an isolation part, the isolation part is configured to mount the busbar, and the isolation part comprises an avoidance region corresponding to the electrode terminal and an avoidance hole corresponding to the pressure relief mechanism, the avoidance region is configured to expose at least part of the busbar, and the avoidance hole and the avoidance region are spaced apart from each other on the isolation part.

18. The battery according to claim 1 , further comprisi

Assignees

• Jiangsu Contemporary Amperex Tech Ltd

Inventors

• Wu Kai
• Huang Xiaoteng
• Wang Wenli
• Hong Jiarong
• Yang Haiqi
• Hu Langchao

Classifications

• H01M2200/20

  Pressure-sensitive devices · CPC title

• H01M2200/10

  Temperature sensitive devices · CPC title

• H01M50/514

  Methods for interconnecting adjacent batteries or cells · CPC title

• H01M50/375

  Vent means sensitive to or responsive to temperature · CPC title

• H01M50/383

  Flame arresting or ignition-preventing means · CPC title