Battery, apparatus using battery, and preparation method and preparation device of battery

Patent metadata

Field	Value
Publication number	US-12113246-B2
Application number	US-202218054698-A
Country	US
Kind code	B2
Filing date	Nov 11, 2022
Priority date	Nov 17, 2020
Publication date	Oct 8, 2024
Grant date	Oct 8, 2024

Abstract

A battery includes a protective box provided with a guiding channel and a plurality of battery cells in the protective box. The plurality of battery cells include a first battery cell and a second battery cell adjacent to each other. The first battery cell includes a pressure relief end provided with a pressure relief mechanism. The pressure relief mechanism is configured to actuate release of internal pressure of the first battery cell in response to the internal pressure or an internal temperature of the first battery cell reaching a threshold. The guiding channel is configured to guide emissions released from the pressure relief mechanism. The pressure relief end of the first battery cell is staggered with one end of the second battery cell that is close to the pressure relief end, in a direction leaving the guiding channel.

First claim

What is claimed is:

1. A battery comprising:
a protective box provided with a first guiding channel and a second guiding channel; and
a plurality of battery cells stacked in the protective box in a stacking direction and each having a height direction and a width direction perpendicular to each other and both perpendicular to the stacking direction, the plurality of battery cells including:
a first battery cell including a terminal end and a non-terminal end opposite each other in the height direction, a positive electrode terminal and a negative electrode terminal of the first battery cell being provided at the terminal end of the first battery cell, the non-terminal end of the first battery cell having no electrode terminal, one of the terminal end and the non-terminal end being a pressure relief end in the height direction, the pressure relief end being provided with a first pressure relief mechanism, and the first pressure relief mechanism being configured to actuate release of internal pressure of the first battery cell in response to the internal pressure or an internal temperature of the first battery cell reaching a threshold; and
a second battery cell adjacent to the first battery cell and including a terminal end and a non-terminal end opposite each other in the height direction, a positive electrode terminal and a negative electrode terminal of the second battery cell being provided at the terminal end of the second battery cell, the non-terminal end of the second battery cell having no electrode terminal, the second battery cell including a pressure relief side in the width direction, the pressure relief side being provided with a second pressure relief mechanism, and the second pressure relief mechanism being configured to actuate release of internal pressure of the second battery cell in response to the internal pressure or an internal temperature of the second battery cell reaching the threshold; wherein:
the first guiding channel is configured to guide emissions released from the first pressure relief mechanism, and the second guiding channel is configured to guide emissions released from the second pressure relief mechanism; and
the pressure relief end of the first battery cell is staggered with one end of the second battery cell that is close to the pressure relief end, in a direction leaving the first guiding channel, and the pressure relief side of the second battery cell is staggered with one side of the first battery cell that is close to the pressure relief side, in a direction leaving the second guiding channel, wherein:
the pressure relief end of the first battery cell is the terminal end of the first battery cell and the one end of the second battery cell that is close to the pressure relief end is the terminal end of the second battery cell; or
the pressure relief end of the first battery cell is the non-terminal end of the first battery cell and the one end of the second battery cell that is close to the pressure relief end is the non-terminal end of the second battery cell.

2. The battery according to claim 1 , wherein: the protective box comprises a protective plate spaced apart from the plurality of battery cells, and the first guiding channel and second guiding channels are formed between the protective plate and the plurality of battery cells; and the protective plate is provided with a recess recessing toward a side of the protective plate that faces away from the plurality of battery cells, and an inner chamber of the recess is configured to communicate with the first and second guiding channels.

3. The battery according to claim 2 , wherein the recess is opposite the first battery cell.

4. The battery according to claim 1 , wherein: the protective box comprises a supporting plate attached to the plurality of battery cells; the first and second guiding channels are provided on one side of the supporting plate away from the plurality of battery cells; and the supporting plate is provided with through holes communicating with the first and second guiding channels and for the emissions to pass through.

5. The battery according to claim 1 , wherein an energy density of the first battery cell is greater than an energy density of the second battery cell.

6. The battery according to claim 5 , wherein the energy density of the first battery cell is 1.1 to 1.6 times the energy density of the second battery cell.

7. The battery according to claim 1 , wherein:
the first battery cell is one of a plurality of first battery cells;
the second battery cell is one of a plurality of second battery cells; and
the plurality of first battery cells and the plurality of second battery cells are arranged alternately.

8. An apparatus comprising the battery according to claim 1 , wherein the battery provides electrical energy for the apparatus.

9. The battery of claim 4 , wherein: the protective box further comprises a base plate facing at least one outer side of the plurality of battery cells; the supporting plate is provided between the base plate and the plurality of battery cells; and the first and second guiding channels is provided between the supporting plate and the base plate.

10. The battery of claim 1 , wherein in a staggering direction in which the pressure relief end of the first battery cell is staggered with respect to the end of the second battery cell that is close to the pressure relief end, a size of the first battery cell is smaller than a size of the second battery cell.

Assignees

• Contemporary Amperex Technology Hong Kong Ltd
• Contemporary Amperex Technology Co Ltd

Inventors

• Liang Chengdu
• Xu Xiaofu
• Ye Yonghuang
• Jin Haizu
• Chen Wenwei
• Liu Qian

Classifications

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M50/581

  in response to temperature · CPC title

• H01M50/209 Primary

  adapted for prismatic or rectangular cells (H01M50/216 takes precedence) · CPC title

• H01M50/367

  Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title