Battery module, battery pack, and vehicle

Patent metadata

Field	Value
Publication number	US-11936056-B2
Application number	US-202117544481-A
Country	US
Kind code	B2
Filing date	Dec 7, 2021
Priority date	Dec 9, 2020
Publication date	Mar 19, 2024
Grant date	Mar 19, 2024

Abstract

A battery module, a battery pack, and a vehicle are described in this patent application. In the battery module, a plurality of grooves separated by partition parts are disposed in a module casing, a plurality of jelly rolls of the battery module are embedded in the grooves, and a top cover covers an opening of each groove to seal the groove as an independent mounting cavity. In this way, each groove wall in the module casing and the top cover may be used as a housing for sealing each jelly roll, to avoid a case in which an electrolyte in each jelly roll decomposes and produces gas in a process of using the battery module because the electrolyte is leaked from one jelly roll to another jelly roll.

First claim

What is claimed is:

1. A battery module, comprising:
a module casing comprising a module housing and a plurality of partition parts located in the module housing, wherein one side of the module housing is an open structure, the partition parts partition an inner cavity of the module housing into a plurality of grooves, and a plurality of jelly rolls are embedded in the plurality of grooves;
a top cover covers openings of the plurality of grooves to seal the plurality of grooves;
wherein the module housing comprises two first sidewalls and two second sidewalls, the two first sidewalls are disposed opposite to each other in an extension direction of the module housing, and the two second sidewalls are disposed opposite to each other in a direction perpendicular to the extension direction of the module housing;
the plurality of partition parts comprise a first partition part and a second partition part that are crosswise disposed, two ends of the first partition part respectively extend to the two first sidewalls, and two ends of the second partition part respectively extend to the two second sidewalls;
wherein a first cooling channel is formed on each of the two first sidewalls and the two second sidewalls, an extension direction of the first cooling channel is the same as an extension direction of a corresponding sidewall, and first cooling channels on the first sidewall and the second sidewall communicate with each other; and
a second cooling channel is formed on the second partition part, and two ends of the second cooling channel respectively extend to first cooling channels on the two second sidewalls.

2. The battery module according to claim 1 , wherein each jelly roll comprises two first surfaces and two second surfaces;
the two first surfaces are disposed opposite to each other in a first direction of said each jelly roll, the two second surfaces are disposed opposite to each other in a second direction of said each jelly roll, an area of the first surface is greater than an area of the second surface, and the first direction intersects with the second direction; and
first surfaces of two adjacent jelly rolls from the plurality of jelly rolls are disposed opposite to each other in an extension direction of the module casing.

3. The battery module according to claim 1 , wherein both the first cooling channel and the second cooling channel provide circulation of coolant.

4. The battery module according to claim 3 , wherein a water inlet and a water outlet that communicate with the first cooling channel are formed on the module housing; and
the water inlet and the water outlet are respectively disposed on the two first sidewalls, or the water inlet and the water outlet are respectively disposed on the two second sidewalls.

5. The battery module according to claim 1 , further comprising:
a plurality of first cooling channels and a corresponding plurality of second cooling channels;
wherein the plurality of first cooling channels are disposed at intervals in a height direction of the module housing; and
the plurality of second cooling channels are disposed at intervals in a height direction of the second partition part, and two ends of each second cooling channel respectively communicate with corresponding first cooling channels.

6. The battery module according to claim 1 , wherein a third cooling channel is formed on each first sidewall, and a fourth cooling channel is formed on the second partition part; and
the third cooling channel extends in a height direction of the first sidewall, two ends of the third cooling channel penetrate through a top surface and a bottom surface of the first sidewall, and
the fourth cooling channel extends in a height direction of the second partition part, and two ends of the fourth cooling channel respectively penetrate through a top surface and a bottom surface of the second partition part.

7. The battery module according to claim 6 , wherein both the third cooling channel and the fourth cooling channel provide circulation of cold air.

8. The battery module according to claim 6 , further comprising:
a plurality of third cooling channels and a plurality of fourth cooling channels, wherein the plurality of third cooling channels and the plurality of fourth cooling channels are disposed at intervals in a direction perpendicular to the extension direction of the module casing.

9. The battery module according to claim 1 , further comprising a plurality of second partition parts, wherein the plurality of second partition parts are disposed at intervals in the extension direction of the module casing.

10. The battery module according to claim 1 , further comprising a plurality of top covers, wherein each top cover covers an opening of a corresponding groove.

11. The battery module according to claim 10 , wherein each top cover is connected to a tab of a corresponding jelly roll using a battery post, and the two adjacent jelly rolls are connected in parallel or in series using a conductive connector connected to the battery post.

12. A battery pack, comprising:
a battery pack casing; and
a plurality of battery modules, wherein all of the plurality of battery modules are fastened to the battery pack casing;
wherein each battery module comprises a module casing, a top cover, and a plurality of jelly rolls,
the module casing comprises a module housing and a plurality of partition parts located in the module housing, wherein one side of the module housing is an open structure, the partition parts partition an inner cavity of the module housing into a plurality of grooves, and the plurality of jelly rolls are embedded in the plurality of grooves,
the top cover covers openings of the plurality of grooves to seal the plurality of grooves;
wherein the module housing comprises two first sidewalls and two second sidewalls, the two first sidewalls are disposed opposite to each other in an extension direction of the module housing, and the two second sidewalls are disposed opposite to each other in a direction perpendicular to the extension direction of the module housing;
the plurality of partition parts comprise a first partition part and a second partition part that are crosswise disposed, two ends of the first partition part respectively extend to the two first sidewalls, and two ends of the second partition part respectively extend to the two second sidewalls;
wherein a first cooling channel is formed on each of the two first sidewalls and the two second sidewalls, an extension direction of the first cooling channel is the same as an extension direction of a corresponding sidewall, and first cooling channels on the first sidewall and the second sidewall communicate with each other; and
a second cooling channel is formed on the second partition part, and two ends of the second cooling channel respectively extend to first cooling channels on the two second sidewalls.

13. The battery pack according to claim 12 , wherein each jelly roll comprises two first surfaces and two second surfaces;
the two first surfaces are disposed opposite to each other in a first direction of said each jelly roll, the two second surfaces are disposed opposite to each other in a second direction of said each jelly roll, an area of the first surface is greater than an area of the second surface, and the first direction intersects with the second direction; and
first surfaces of two adjacent jelly rolls from the plurality of jelly rolls are disposed opposite to each other in an extension direction of the module casing.

14. A vehicle, comprising:
a battery module, electrically connected to an electrical device, to sup

Assignees

• Huawei Digital Power Tech Co Ltd

Inventors

• Zhang Guanghui
• Qin Zhen
• Feng Kai

Classifications

• H01M50/209 Primary

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

• H01M10/0431

  Cells with wound or folded electrodes (H01M10/045 takes precedence) · CPC title

• H01M10/625

  Vehicles · CPC title

• H01M2220/20

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

• B60L58/26 Primary

  by cooling · CPC title