Thermal management power battery assembly and battery pack

Patent metadata

Field	Value
Publication number	US-11509001-B2
Application number	US-201716316894-A
Country	US
Kind code	B2
Filing date	Dec 18, 2017
Priority date	May 16, 2017
Publication date	Nov 22, 2022
Grant date	Nov 22, 2022

Abstract

A thermal management power battery assembly and a battery pack having a plurality of the thermal management power battery assemblies connected in series. The battery assembly includes a plurality of staggered battery cells, a thermal conduction module, a liquid cooling module, and a battery cell fixing module for fixing the battery cells. The battery cell fixing module includes a battery cell position limiting device, and assembly supporting device located at two sides of the battery cell position limiting device; the liquid cooling module is integrated in the assembly supporting device; the thermal conduction module is simultaneously in contact with the battery cells and the assembly supporting device. The liquid cooling module is integrated with the assembly supporting device. The liquid cooling module is intergrated with the assembly supporting device.

First claim

What is claimed is:

1. A thermal management power battery assembly, comprising:
a battery cell fixing module, which comprises a battery cell position limiting device and an assembly supporting device, wherein the assembly supporting device is disposed on two sides of the battery cell position limiting device, the assembly supporting device comprises a hollow cavity, the assembly supporting device comprises a device body, the hollow cavity is disposed in the device body, the battery cell position limiting device is located entirely outside of the hollow cavity, the battery cell position limiting device is not in direct physical contact with the hollow cavity, and a water inlet and a water outlet are disposed on a sidewall of the hollow cavity;
a plurality of staggered battery cells, which are fixed by the battery cell fixing module;
a thermal conduction module, which is in contact with the plurality of staggered battery cells and the assembly supporting device; and
a liquid cooling module, which is integrated in the assembly supporting device, wherein the liquid cooling module comprises the hollow cavity,
wherein pipe joints are respectively disposed at the water inlet and the water outlet, the hollow cavity and the pipe joints constitute the liquid cooling module; and
wherein a plurality of cavity reinforcements are disposed in the hollow cavity, the plurality of cavity reinforcements are arranged in parallel with each other, two ends of each of the plurality of cavity reinforcements are respectively connected to an inner wall of the hollow cavity.

2. The thermal management power battery assembly according to claim 1 , wherein, the assembly supporting device further comprises a supporting connecting plate;
the supporting connecting plate is fixedly connected to the device body and disposed on a side of the device body away from the plurality of staggered battery cells, a plurality of box connecting holes are disposed at the supporting connecting plate.

3. The thermal management power battery assembly according to claim 1 , wherein, the battery cell position limiting device comprises a cover component and a bracket component,
the bracket component comprises an upper bracket and a lower bracket, the upper bracket and the lower bracket are respectively disposed at two ends of the plurality of staggered battery cells;
the cover component comprises an upper cover and a lower cover, the upper cover is disposed on a side of the upper bracket away from the plurality of staggered battery cells, the lower cover is disposed on a side of the lower bracket away from the plurality of staggered battery cells.

4. The thermal management power battery assembly according to claim 3 , wherein,
the plurality of staggered battery cells and the bracket component are bonded by ultraviolet (UV) glue, the cover component and the bracket component are both made of a transparent polycarbonate (PC) material.

5. The thermal management power battery assembly according to claim 3 , wherein,
a first position limiting bulge is disposed on a surface of the device body facing to the upper bracket;
a second position limiting bulge is disposed on a surface of the device body facing to the lower bracket;
the upper bracket is provided with a first position limiting groove capable of cooperating with the first position limiting bulge;
the lower bracket is provided with a second position limiting groove capable of cooperating with the second position limiting bulge;
the device body is engaged between the upper bracket and the lower bracket through the first position limiting bugle, the second position limiting bugle, the first position limiting groove and the second position limiting groove.

6. The thermal management power battery assembly according to claim 5 , wherein,
first battery cell mounting holes are symmetrically disposed at the upper bracket and the lower bracket;
two ends of each of the plurality of staggered battery cells respectively pass through one of the first battery cell mounting holes, and the two ends of each of the plurality of staggered battery cells are fixedly mounted in the upper bracket and the lower bracket;
second battery cell mounting holes are respectively disposed at the upper cover and the lower cover, the second battery cell mounting holes are counterbores;
the two ends of each of the plurality of staggered battery cells pass through the first battery cell mounting hole to be located in the counterbores.

7. The thermal management power battery assembly according to claim 1 , wherein,
the thermal conduction module is made of thermally conductive graphite;
the thermal conduction module surrounds each of the plurality of staggered battery cells, and two ends of the thermal conduction module are in contact with the assembly supporting device, respectively.

8. A thermal management power battery pack, comprising: a plurality of thermal management power battery assemblies, a battery pack position limiting device and a battery pack supporting device, wherein,
each of the plurality of thermal management power battery assemblies comprises:
a battery cell fixing module, which comprises a battery cell position limiting device and an assembly supporting device, wherein the assembly supporting device is disposed on two sides of the battery cell position limiting device, the assembly supporting device comprises a hollow cavity, the assembly supporting device comprises a device body, the hollow cavity is disposed in the device body, the battery cell position limiting device is located entirely outside of the hollow cavity, the battery cell position limiting device is not in direct physical contact with the hollow cavity, and a water inlet and a water outlet are disposed on a sidewall of the hollow cavity;
a plurality of staggered battery cells, which are fixed by the battery cell fixing module;
a thermal conduction module, which is in contact with the plurality of staggered battery cells and the assembly supporting device; and

a liquid cooling module, which is integrated in the assembly supporting device, wherein the liquid cooling module comprises the hollow cavity; the plurality of thermal management power battery assemblies are arranged in series;
the battery pack position limiting device is disposed on the outside of the plurality of thermal management power battery assemblies; and
the battery pack supporting device is integrated with the battery pack liquid cooling module,
wherein pipe joints are respectively disposed at the water inlet and the water outlet, the hollow cavity and the pipe joints constitute the liquid cooling module;
wherein a plurality of cavity reinforcements are disposed in the hollow cavity, the plurality of cavity reinforcements are arranged in parallel with each other, two ends of each of the plurality of cavity reinforcements are respectively connected to an inner wall of the hollow cavity.

9. The thermal management power battery pack according to claim 8 , wherein, the assembly supporting device comprises a supporting connecting plate;
the supporting connecting plate is fixedly connected to the device body and disposed on a side of the device body away from the plurality of staggered battery cells, a plurality of box connecting holes are disposed at the supporting connecting plate.

10. The thermal management power battery pack according to claim 8 , wherein, the battery cell position limiting device comprises a cover component and a bracket component,
the bracket component comprises an upper bracket and a lower bracket, the upper bracket and the lower bracket are respectively disposed at two ends of the plurality of staggered battery cells;
the cover component comprises an

Assignees

• Eve Energy Co Ltd

Inventors

• Jiang Jibing
• Feng Yanqiang
• Yuan Dingding
• Huang Guomin
• Liu Jincheng

Classifications

• H01M10/6567 Primary

  Liquids · CPC title

• H01M10/653

  characterised by electrically insulating or thermally conductive materials · CPC title

• H01M50/278

  Organic material · CPC title

• H01M50/227

  Organic material · CPC title

• H01M50/213

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