Battery and related apparatus, production method and production device therefor

Patent metadata

Field	Value
Publication number	US-11749865-B2
Application number	US-202117562608-A
Country	US
Kind code	B2
Filing date	Dec 27, 2021
Priority date	Jul 10, 2020
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

The present application discloses a battery and a related apparatus, production method and production device therefor. The battery includes: a battery cell, the battery cell including a pressure relief mechanism configured to be capable of being actuated when an internal pressure or temperature of the battery cell reaches a threshold, to relieve the internal pressure; an attachment component adapted to be attached to the battery cell by an adhesive; and an isolation component configured to be capable of preventing the adhesive from being applied between the attachment component and the pressure relief mechanism. By providing the isolation component, it is possible to prevent the adhesive from being applied between the attachment component and the pressure relief mechanism in an effective manner in a process of battery production. Meanwhile, application efficiency and accuracy of the adhesive could be improved, thereby improving production efficiency 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;
an attachment component;
an adhesive configured to attach the attachment component to the battery cell; and
an isolation component, comprising a main body and a protrusion arranged to protrude from a surface of the main body, wherein the protrusion is arranged to correspond to the pressure relief mechanism, so as to prevent the adhesive from being applied between the attachment component and the pressure relief mechanism;
wherein the protrusion comprises a first protrusion and a second protrusion, the first protrusion corresponds to a position of the pressure relief mechanism, the second protrusion is arranged around the first protrusion, and the first protrusion and the second protrusion are configured to prevent the adhesive from being applied between the attachment component and the pressure relief mechanism;
wherein a groove is formed between the first protrusion and the second protrusion, the groove is configured to accommodate at least part of the adhesive to prevent the adhesive from entering between the attachment component and the pressure relief mechanism.

2. The battery according to claim 1 , wherein the pressure relief mechanism has an actuation region, and the pressure relief mechanism is configured, when the internal pressure or temperature of the battery cell reaches the threshold, to form a relief channel for relieving the internal pressure in the actuation region.

3. The battery according to claim 2 , wherein the isolation component is configured to at least surround the actuation region to prevent the adhesive from entering the actuation region.

4. The battery according to claim 2 , wherein the protrusion is arranged to correspond to a position of the actuation region of the pressure relief mechanism, and the protrusion is configured to at least surround the actuation region to prevent the adhesive from entering the actuation region.

5. The battery according to claim 1 , wherein the second protrusion comprises:
a first side wall configured to be connected to the main body, the first side wall being a wall shared by the second protrusion and the groove;
a second side wall configured to be connected to the main body, the second side wall being arranged opposite to the first side wall; and
a connecting wall configured to connect the first side wall and the second side wall.

6. The battery according to claim 5 , wherein at least one of the first side wall and the second side wall comprises a first projection, and the first projection is arranged to protrude in a first direction, wherein the first direction is perpendicular to a protruding direction of the second protrusion.

7. The battery according to claim 5 , wherein at least one of the first side wall and the second side wall is arranged obliquely relative to a direction in which the attachment component faces the battery cell.

8. The battery according to claim 5 , wherein the connecting wall comprises a second projection, the second projection is arranged to protrude in a direction in which the attachment component faces the battery cell, or arranged to protrude in a direction in which the battery cell faces the attachment component.

9. The battery according to claim 5 , wherein the second protrusion comprises a cavity, at least one of the first side wall, the second side wall and the connecting wall is provided with an opening, and the opening is in communication with the cavity, so that at least part of the adhesive enters the cavity through the opening.

10. The battery according to claim 5 , wherein the first protrusion comprises:
a third side wall configured to be connected to the main body, the third side wall being a wall shared by the first protrusion and the groove, and the third side wall being arranged opposite to the first side wall;
wherein the third side wall comprises a third projection, the third projection is arranged to protrude in a first direction, and the first direction is perpendicular to a protruding direction of the second protrusion; and/or the third side wall is arranged obliquely relative to a direction in which the attachment component faces the battery cell.

11. The battery according to claim 1 , wherein the second protrusion is an annular structure.

12. The battery according to claim 1 , wherein the second protrusion is an elastic component attached to the surface of the main body.

13. The battery according to claim 1 , wherein the protrusion further comprises a third protrusion, and the third protrusion is arranged around the second protrusion.

14. The battery according to claim 4 , wherein a through hole is disposed on a wall of the protrusion facing the pressure relief mechanism, and the through hole is configured such that emissions from the battery cell pass through the isolation component when the pressure relief mechanism is actuated.

15. The battery according to claim 14 , wherein the through hole is arranged around the pressure relief mechanism to prevent the adhesive from entering between the pressure relief mechanism and the attachment component.

16. The battery according to claim 4 , wherein
the battery comprises a plurality of battery cells, and each of the plurality of battery cells comprises the pressure relief mechanism; and
the isolation component comprises at least one protrusion;
wherein the protrusion is in one-to-one correspondence to the pressure relief mechanism, or the protrusion corresponds to at least two pressure relief mechanisms.

17. An apparatus comprising:
a battery, comprising:
a battery cell, comprising:
a pressure relief mechanism configured to be capable of being actuated when an internal pressure or temperature of the battery cell reaches a threshold, to relieve the internal pressure;

an attachment;
an adhesive configured to attach the attachment component to the battery cell; and
an isolation component, comprising a main body and a protrusion arranged to protrude from a surface of the main body, wherein the protrusion is arranged to correspond to the pressure relief mechanism, so as to be capable of preventing the adhesive from being applied between the attachment component and the pressure relief mechanism;
wherein the protrusion comprises a first protrusion and a second protrusion, the first protrusion corresponds to a position of the pressure relief mechanism, the second protrusion is arranged around the first protrusion, and the first protrusion and the second protrusion are configured to prevent the adhesive from being applied between the attachment component and the pressure relief mechanism, a groove is formed between the first protrusion and the second protrusion, the groove is configured to accommodate at least part of the adhesive to prevent the adhesive from entering between the attachment component and the pressure relief mechanism; and
wherein the battery being configured to provide electrical energy.

18. A device for producing a battery, comprising:
a battery cell production module for producing a plurality of battery cells, at least one battery cell of the plurality of battery cells 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;
an attachment component production module for producing an attachment component;
an

Assignees

• Contemporary Amperex Technology Co Ltd

Inventors

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

Classifications

• H01M50/342 Primary

  Non-re-sealable arrangements · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M10/6567

  Liquids · CPC title

• H01M50/24 Primary

  adapted for protecting batteries from their environment, e.g. from corrosion (thermal insulation H01M10/658) · CPC title

• H01M50/325

  comprising deformable valve members, e.g. elastic or flexible valve members · CPC title