Battery cell assembly, battery module, and battery pack

Patent metadata

Field	Value
Publication number	US-12176559-B2
Application number	US-201917419697-A
Country	US
Kind code	B2
Filing date	Mar 25, 2019
Priority date	Dec 30, 2018
Publication date	Dec 24, 2024
Grant date	Dec 24, 2024

Abstract

The present disclosure relates to the technical field of energy storage devices, and provides a battery cell assembly, a battery module, and a battery pack. The battery cell assembly includes: at least two battery cells and an insulation film. The at least two battery cells are stacked. Each battery cell includes an electrode assembly and a battery housing. The electrode assembly is accommodated in the battery housing. The electrode assembly includes a first electrode plate, a second electrode plate, and a separator disposed between the first electrode plate and the second electrode plate. The insulation film surrounds a periphery of the at least two battery cells to wrap the at least two battery cells together.

First claim

What is claimed is:

1. A battery cell assembly, comprising:
at least two battery cells, wherein the at least two battery cells are stacked, each battery cell of the at least two battery cells comprises an electrode assembly and a battery housing, the electrode assembly is accommodated in the battery housing, and the electrode assembly comprises a first electrode plate, a second electrode plate, and a separator disposed between the first electrode plate and the second electrode plate; and
an insulation film, configured to surround a periphery of the at least two battery cells to wrap the at least two battery cells together; and, wherein
each of the at least two battery cells further comprises a cover plate, the battery housing has an opening, the battery housing comprises one end face, two first lateral faces, and two second lateral faces, each of the two first lateral faces is larger than each of the two second lateral faces and larger than the end face in area, two first lateral faces of two adjacent battery cells of the at least two battery cells face to each other, and the one end face, the two first lateral faces, and the two second lateral faces define a cavity that accommodates the electrode assembly, wherein the insulation film comprises a first adhesive groove, the first adhesive groove faces to the first lateral face, a part of the first lateral face is exposed from the first adhesive groove, and the exposed part of the first lateral face is configured to connect to an adhesive.

2. The battery cell assembly according to claim 1 , wherein an insulation piece is disposed between two adjacent battery cells of the at least two battery cells.

3. The battery cell assembly according to claim 2 , wherein two surfaces of the insulation piece are bonded to the-two adjacent battery cells of the at least two battery cells respectively.

4. The battery cell assembly according to claim 2 , wherein the insulation piece is elastic.

5. The battery cell assembly according to claim 1 , wherein
the cover plate covers the opening, each of the at least two battery cells comprises a first electrode terminal and a second electrode terminal, and the first electrode terminal and the second electrode terminal are disposed on the cover plate.

6. The battery cell assembly according to claim 1 , wherein the insulation film surrounds the first lateral faces, the second lateral faces, and the end faces of the at least two battery cells.

7. The battery cell assembly according to claim 1 , wherein the insulation film comprises a second adhesive groove, the second adhesive groove faces to the end face, a part of the end face is exposed from the second adhesive groove, and the exposed part of the end face is configured to connect to an adhesive.

8. A battery module, comprising at least two battery cell assemblies arranged in a horizontal direction, and a plurality of busbars electrically connected to the at least two battery cell assemblies, wherein each of the at least two battery cell assemblies comprises:
at least two battery cells, wherein the at least two battery cells are stacked, each of the at least two battery cell comprises an electrode assembly and a battery housing, the electrode assembly is accommodated in the battery housing, and the electrode assembly comprises a first electrode plate, a second electrode plate, and a separator disposed between the first electrode plate and the second electrode plate; and
an insulation film, configured to surround a periphery of the at least two battery cells to wrap the at least two battery cells together,
wherein each of the at least two battery cells further comprises a cover plate, the battery housing has an opening, the battery housing comprises one end face, two first lateral faces, and two second lateral faces, each of the two first lateral faces is larger than each of the two second lateral faces and larger than the end face in area, two first lateral faces of two adjacent battery cells of the at least two battery cells face to each other, and the one end face, the two first lateral faces, and the two second lateral faces define a cavity that accommodates the electrode assembly, wherein the insulation film comprises a first adhesive groove, the first adhesive groove faces to the first lateral face, a part of the first lateral face is exposed from the first adhesive groove, and the exposed part of the first lateral face is configured to connect to an adhesive.

9. The battery module according to claim 8 , wherein a size of the battery module in the horizontal direction is larger than a size of the battery module in a vertical direction, the electrode assembly is of a wound structure and is flat, outer surfaces of the electrode assembly comprise two flat surfaces that are opposite to each other in the vertical direction; or, the electrode assembly is of a laminated stacked structure, and the first electrode plate, the separator, and the second electrode plate are stacked in the vertical direction.

10. A battery pack, comprising:
a battery box, defining an accommodation cavity; and
a plurality of battery modules, wherein the plurality of battery modules are disposed in the accommodation cavity, each of the plurality of battery modules comprises at least two battery cell assemblies arranged in a horizontal direction, and a plurality of busbars electrically connected to the at least two battery cell assemblies, and each of the at least two battery cell assemblies comprises:
at least two battery cells, wherein the at least two battery cells are stacked, each of the at least two battery cell comprises an electrode assembly and a battery housing, the electrode assembly is accommodated in the battery housing, and the electrode assembly comprises a first electrode plate, a second electrode plate, and a separator disposed between the first electrode plate and the second electrode plate; and
an insulation film, configured to surround a periphery of the at least two battery cells to wrap the at least two battery cells together; and, wherein
each of the at least two battery cells further comprises a cover plate, the battery housing has an opening, the battery housing comprises one end face, two first lateral faces, and two second lateral faces, each of the two first lateral faces is larger than each of the two second lateral faces and larger than the end face in area, two first lateral faces of two adjacent battery cells of the at least two battery cells face to each other, and the one end face, the two first lateral faces, and the two second lateral faces define a cavity that accommodates the electrode assembly, wherein the insulation film comprises a first adhesive groove, the first adhesive groove faces to the first lateral face, a part of the first lateral face is exposed from the first adhesive groove, and the exposed part of the first lateral face is configured to connect to an adhesive.

11. The battery module according to claim 8 , wherein an insulation piece is disposed between two adjacent one of the at least two battery cells.

12. The battery module according to claim 11 , wherein two surfaces of the insulation piece are bonded to the two adjacent one of the at least two battery cells respectively.

13. The battery module according to claim 11 , wherein the insulation piece is elastic.

14. The battery module according to claim 8 , wherein
the cover plate covers the opening, each of the at least two battery cells comprise a first electrode terminal and a second electrode terminal, and the first electrode terminal and the second electrode terminal are disposed on the cover plate.

15. The battery mod

Assignees

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

Inventors

• Li Zhenhua
• Jin Haizu
• Shi Dongyang
• Chen Ning
• Hu Fei
• Chen Yuanbao

Classifications

• H01M50/502

  Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing · CPC title

• H01M50/293

  characterised by the material · CPC title

• H01M50/291

  characterised by their shape · CPC title

• H01M50/209 Primary

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

• H01M50/289

  characterised by spacing elements or positioning means within frames, racks or packs (spacing elements inside cells other than separators, membranes or diaphragms H01M50/471) · CPC title