Battery, manufacturing method and manufacturing apparatus thereof, and power consumption device

Patent metadata

Field	Value
Publication number	US-11916248-B2
Application number	US-202217588266-A
Country	US
Kind code	B2
Filing date	Jan 29, 2022
Priority date	May 31, 2021
Publication date	Feb 27, 2024
Grant date	Feb 27, 2024

Abstract

Embodiments of the present disclosure provide a battery, a manufacturing method and a manufacturing apparatus thereof, and a power consumption device. The battery includes: at least one battery layer, wherein each battery layer includes a plurality of battery cells disposed side by side in a first direction, and each battery cell in the plurality of battery cells includes a case and an end cover which are connected to each other; and at least one limiting member disposed corresponding to the at least one battery layer and covering the case, so as to limit the corresponding battery layer to move in a third direction, wherein the third direction is perpendicular to the at least one battery layer, the at least one limiting member includes a first limiting member, the first limiting member is provided with a weakened region, and the weakened region is configured to enable the battery cell to release pressure through a region of the case corresponding to the weakened region when an internal pressure of the battery cell reaches a first threshold.

First claim

What is claimed is:

1. A battery, comprising:
a box body;
at least one battery layer, accommodated in the box body, wherein each battery layer in the at least one battery layer comprises a plurality of battery cells disposed side by side in a first direction, and each battery cell in the plurality of battery cells comprises a case and an end cover which are connected to each other; and
at least one limiting member, disposed corresponding to the at least one battery layer and covering the case, so as to limit the corresponding battery layer to move in a third direction, wherein the third direction is perpendicular to the at least one battery layer, the at least one limiting member comprises a first limiting member, the first limiting member is provided with a weakened region, and the weakened region is configured to enable the battery cell to release pressure through a wall of the case corresponding to the weakened region when an internal pressure of the battery cell reaches a first threshold.

2. The battery according to claim 1 , comprising a plurality of battery layers stacked in the third direction, wherein the first limiting member is disposed between every two adjacent battery layers.

3. The battery according to claim 1 , wherein the weakened region is configured to form a channel for outward discharge of emissions of the battery cell during pressure release of the battery cell.

4. The battery according to claim 1 , wherein the at least one limiting member is the first limiting member, and each first limiting member is provided with the weakened region at a position of each battery cell in the corresponding battery layer.

5. The battery according to claim 1 , wherein the first limiting member is provided with a plurality of weakened regions at intervals in the first direction.

6. The battery according to claim 1 , wherein the weakened region covers at least two adjacent battery cells in the first direction.

7. The battery according to claim 1 , wherein in a second direction, a size of the weakened region is less than a size of the case, wherein the second direction is perpendicular to a plane defined by the first direction and the third direction.

8. The battery according to claim 7 , wherein in the second direction, the weakened region is disposed in a middle region of the case.

9. The battery according to claim 1 , wherein a projection of the weakened region in a reference plane perpendicular to the third direction is rectangular.

10. The battery according to claim 1 , wherein the weakened region comprises at least one of a through hole or a thickness-reduced portion.

11. The battery according to claim 1 , wherein there is a gap between adjacent battery cells in the same battery layer, and the gap is in communication with the weakened region.

12. The battery according to claim 1 , wherein the battery cell is provided with a pressure release mechanism, and the pressure release mechanism is configured to release pressure when the internal pressure of the battery cell reaches the first threshold.

13. The battery according to claim 12 , wherein an area of the weakened region is greater than an area of the pressure release mechanism.

14. The battery according to claim 12 , wherein the pressure release mechanism is disposed on the case, and the pressure release mechanism and the weakened region are correspondingly disposed.

15. The battery according to claim 1 , wherein the at least one limiting member is made of a metal material.

16. The battery according to claim 15 , wherein an insulating film is disposed between each limiting member in the at least one limiting member and the adjacent battery cell to insulate the limiting member from the battery cell.

17. The battery according to claim 1 , wherein the battery cell has a cylindrical shape, each limiting member in the at least one limiting member is provided with a recessed portion, and the recessed portion is configured to accommodate the battery cell to limit movement of the battery cell in the first direction and the third direction.

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

19. A battery manufacturing method, comprising:
forming at least one battery layer by assembling, wherein each battery layer in the at least one battery layer comprises a plurality of battery cells disposed side by side in a first direction, and each battery cell in the plurality of battery cells comprises a case and an end cover which are connected to each other;
providing at least one limiting member, wherein the at least one limiting member comprises a first limiting member, the first limiting member is provided with a weakened region, and the weakened region is configured to enable the battery cell to release pressure through a wall of the case corresponding to the weakened region when an internal pressure of the battery cell reaches a first threshold; and
disposing the at least one limiting member corresponding to the at least one battery layer and covering the case, so as to limit the corresponding battery layer to move in a third direction perpendicular to the first direction, and accommodating them in a box body, wherein the third direction is perpendicular to the at least one battery layer.

20. A battery manufacturing apparatus, comprising:
a battery layer assembling device, configured to form at least one battery layer by assembling, wherein each battery layer in the at least one battery layer comprises a plurality of battery cells disposed side by side in a first direction, and each battery cell in the plurality of battery cells comprises a case and an end cover which are connected to each other;
a limiting member supply device, configured to supply at least one limiting member, wherein the at least one limiting member comprises a first limiting member, and the first limiting member is provided with a weakened region, which enables the battery cell to release pressure through a wall of the case corresponding to the weakened region when an internal pressure of the battery cell reaches a first threshold; and
a battery assembling device, configured to dispose the at least one limiting member corresponding to the at least one battery layer and covering the case, so as to limit the corresponding battery layer to move in a third direction perpendicular to the first direction, and accommodate them in a box body, wherein the third direction is perpendicular to the at least one battery layer.

Assignees

• Contemporary Amperex Technology Co Ltd

Inventors

• Wang Xuehui
• Gao Xiongwei

Classifications

• H01M50/317 Primary

  Re-sealable arrangements · CPC title

• H01M10/445

  in response to gas pressure · CPC title

• H01M50/107

  having curved cross-section, e.g. round or elliptic (H01M50/103, H01M50/109, H01M50/11 take precedence) · CPC title

• H01M50/152

  for cells having curved cross-section, e.g. round or elliptic (H01M50/15, H01M50/153 take precedence) · CPC title

• H01M50/213 Primary

  adapted for cells having curved cross-section, e.g. round or elliptic (H01M50/209, H01M50/216 take precedence) · CPC title