Battery Module

Patent metadata

Field	Value
Publication number	US-2019081373-A1
Application number	US-201816129765-A
Country	US
Kind code	A1
Filing date	Sep 12, 2018
Priority date	Sep 14, 2017
Publication date	Mar 14, 2019
Grant date	—

Abstract

The disclosure provides a battery module. The battery module includes a battery stacked body, which includes stacked batteries; cooling plates that are installed at the tail ends in a battery stacking direction of the battery stacked body, and the cooling plates and the battery stacked body are installed in a thermal insulation mode; and heat transfer device that are in thermal contact with the cooling plates, and heat of the batteries is transferred to the cooling plates through the heat transfer device; wherein in a normal charging-discharging state, the battery with the highest temperature in the battery stacked body is a battery A; and between a single cooling plate and the battery A, a thermal resistance between each battery and the heat transfer device is reduced along with the increase of a distance between the each battery and the cooling plate in the battery stacking direction.

First claim

What is claimed is:

1 . A battery module, comprising:
a battery stacked body, wherein the battery stacked body comprises a plurality of stacked batteries; a cooling plate, wherein the cooling plate is provided at a tail end in a battery stacking direction of the battery stacked body, and the cooling plate and the battery stacked body are provided in a thermal insulation manner; and a heat transfer device, wherein the heat transfer device is in thermal contact with the cooling plate, and heat of the batteries is transferred to the cooling plate through the heat transfer device; wherein in a normal charging-discharging state, a battery with a highest temperature in the battery stacked body is a battery A; and between a single cooling plate and the battery A, a thermal resistance between each battery and the heat transfer device is reduced along with an increase of a distance between the each battery and the cooling plate in the battery stacking direction.

2 . The battery module as claimed in claim 1 , wherein the battery stacked body further comprises heat-conducting fins, each battery at least contacts with one heat-conducting fin, and the heat-conducting fins are in thermal contact with the heat transfer device.

3 . The battery module as claimed in claim 2 , wherein between the single cooling plate and the battery A, a thickness of each heat-conducting fin is increased along with an increase of a distance between the each heat-conducting fin and the cooling plate in the battery stacking direction.

4 . The battery module as claimed in claim 2 , wherein between the cooling plate and the battery A, a thermal contact area between each battery and the corresponding heat-conducting fin is enlarged along with an increase of a distance between the each battery and the cooling plate in the battery stacking direction.

5 . The battery module as claimed in claim 2 , wherein each of the heat-conducting fins is provided with at least one through hole; and between the cooling plate and the battery A, a total cross-sectional area of the at least one through hole in each heat-conducting fin is reduced along with an increase of a distance between the each heat-conducting fin and the cooling plate in the battery stacking direction.

6 . The battery module as claimed in claim 2 , wherein each of the heat-conducting fins is provided with a bending portion, and is in thermal contact with the heat transfer device through the bending portion; and between the cooling plate and the battery A, a thermal contact area between the bending portion of each heat-conducting fin and the heat transfer device is enlarged along with an increase of a distance between the each heat-conducting fin and the cooling plate in the battery stacking direction.

7 . The battery module as claimed in claim 6 , wherein the bending portion is provided with at least one through hole; and between the single cooling plate and the battery A, a total cross-sectional area of the at least one through hole in the bending portion of each heat-conducting fin is reduced along with an increase of a distance between the each heat-conducting fin and the cooling plate in the battery stacking direction.

8 . The battery module as claimed in claim 6 , wherein one side, in thermal contact with the heat transfer device, of the bending portion is provided with a groove, and the groove is not in thermal contact with the heat transfer device; and between the single cooling plate and the battery A, a total area of the groove at the side, in thermal contact with the heat transfer device, of the bending portion of each heat-conducting fin is reduced along with an increase of a distance between the each heat-conducting fin and the cooling plate in the battery stacking direction.

9 . The battery module as claimed in claim 1 , wherein the batteries comprised in the battery stacked body are stacked in a vertical direction.

10 . The battery module as claimed in claim 1 , wherein there are two heat transfer devices, and the heat transfer devices are respectively provided at two opposite sides of the battery stacked body.

11 . The battery module as claimed in claim 1 , wherein the cooling plate is provided with a liquid inlet and a liquid outlet.

12 . The battery module as claimed in claim 1 , wherein two tail ends of the battery stacked body in the battery stacking direction are provided with the cooling plate.

13 . The battery module as claimed in claim 1 , wherein a thermal-insulating layer is provided between the cooling plate and the battery stacked body.

Assignees

• Microvast Power Systems Co Ltd

Inventors

• Liu Shaosong
• Mattis Wenjuan Liu
• Wu Shengxian

Classifications

• H01M10/647

  Prismatic or flat cells, e.g. pouch cells · CPC title

• H01M10/6554 Primary

  Rods or plates · CPC title

• H01M10/613 Primary

  Cooling or keeping cold · CPC title

• H01M10/6551

  Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings · CPC title

• H01M10/6555

  arranged between the cells · CPC title