Battery module including side pressure plates and pouch cell modules

Patent metadata

Field	Value
Publication number	US-11437666-B2
Application number	US-201916528147-A
Country	US
Kind code	B2
Filing date	Jul 31, 2019
Priority date	Jul 31, 2019
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

Abstract

A battery module made from a plurality of side-by-side pouch cell modules, wherein each pouch cell module is formed with a pair of cells on either side of an insulation pad with the cells in turn positioned between first and second metal brackets such that each cell contacts an insulation pad on one side and a metal bracket on the other. Also included are a pair of pressure plates at the ends of the stack of side-by-side pouch cells and a compression band wrapping around the plurality of side-by-side pouch cells and the pressure plates. A busbar electrically connects the plurality of side-by-side pouch cells together.

First claim

What is claimed is:

1. A battery module, comprising:
a plurality of pouch cell modules positioned together side-by-side, wherein each pouch cell module comprises:
a first bracket,
a second bracket,
a pair of cells positioned between the first and second brackets, and
an insulation pad positioned between the pair of cells;

a busbar electrically connecting the plurality of side-by-side pouch cell modules together;
a pair of pressure plates, with one pressure plate of the pair of pressure plates disposed on one side of the battery module and one other pressure plate of the pair of pressure plates plate disposed on one other side of the battery module;
at least one compression band wrapped around the plurality of side-by-side pouch cell modules and the pair of pressure plates;
a top cover spanning across each top of the plurality of side-by-side pouch cell modules; and
a bottom cover spanning across each bottom of the plurality of side-by-side pouch cell modules; and
wherein each cell of the plurality of side-by-side pouch cell modules has a top tab and a bottom tab, and wherein top tabs of the pair of cells are fastened to each other and bottom tabs of the pair of cells are fastened to each other, said top tab extending in a different direction, relative to the cell, than the bottom tab, and wherein the top tab of one of the pair of cells is formed in an L-shape that extends across the insulation pad to make contact with the top tab of the other of the pair of cells and that extends away from the insulation pad to make contact with the busbar.

2. The battery module of claim 1 , further comprising:
a slave board connected to one of the pressure plates at an end of the battery module.

3. The battery module of claim 1 , wherein the top cover has downwardly extending edges that wrap around top ends of each of the plurality of pouch cell modules, and the bottom cover has upwardly extending edges that wrap around bottom ends of each of the plurality of pouch cell modules.

4. The battery module of claim 1 , wherein the at least one compression band comprises an upper compression band and a lower compression band both wrapping around the plurality of side-by-side pouch cell modules.

5. The battery module of claim 1 , wherein the first and second brackets are made of aluminum.

6. The battery module of claim 1 , wherein the insulation pad is made of a thermally insulating material.

7. The battery module of claim 1 , wherein each cell has 36 batteries in a 3S4P or 3P12S or 48 cells in a 6P8S configuration.

8. The battery module of claim 1 , further comprising: a voltage and temperature sensing board in electrical communication with each of the plurality of side-by-side pouch cells.

9. The battery module of claim 1 , wherein the top tabs are separately fastened to each other from the bottom tabs.

10. The battery module of claim 9 , wherein the busbar is welded to the top and bottom tabs of the cells.

11. The battery module of claim 1 , wherein the first bracket has longitudinally extending side edges and the second bracket is positioned between the longitudinally extending side edges of the first bracket.

12. The battery module of claim 11 , wherein the longitudinally extending side edges of the first brackets have notches therein and the at least one compression band is received into the notches.

13. An automotive battery, comprising:
a plurality of pouch cell modules positioned together side-by-side, wherein each pouch cell module comprises a pair of cells separated by an insulation pad; a busbar electrically connecting the plurality of side-by-side pouch cell modules together; a pair of pressure plates, wherein each of the pressure plates are disposed on a side of the plurality of pouch cell modules;
at least one compression band wrapped around the plurality of side-by-side pouch cell modules and the pair of pressure plates;
a top cover spanning across each top of the plurality of side-by-side pouch cell modules; and
a bottom cover spanning across each bottom of the plurality of side-by-side pouch cell modules; and
wherein each cell of the plurality of side-by-side pouch cell modules has a top tab and a bottom tab, and wherein top tabs of the pair of cells are fastened to each other and bottom tabs of the pair of cells are fastened to each other, said top tab extending in a different direction than the bottom tab, and wherein the top tab of one of the pair of cells is formed in an L-shape that extends across the insulation pad to make contact with the top tab of the other of the pair of cells and that extends away from the insulation pad to make contact with the busbar.

14. The automotive battery of claim 13 , further comprising a slave board connected to one of the pressure plates.

15. The automotive battery of claim 13 , wherein the top cover has downwardly extending edges that wrap around top ends of each of the plurality of pouch cell modules, and the bottom cover has upwardly extending edges that wrap around bottom ends of each of the plurality of pouch cell modules.

16. The automotive battery of claim 13 , wherein the at least one compression band comprises an upper compression band and a lower compression band both wrapping around the plurality of side-by-side pouch cell modules.

17. The automotive battery of claim 13 , wherein the top tabs are fastened to each other separately from the bottom tabs.

18. The automotive battery of claim 17 , wherein the busbar is welded to the top and bottom tabs of the cells.

19. The automotive battery of claim 13 , wherein each of the pouch cell modules includes a first bracket that has longitudinally extending side edges and a second bracket positioned between the longitudinally extending side edges of the first bracket.

20. The automotive battery of claim 19 , wherein the longitudinally extending side edges of the first brackets have notches therein and the at least one compression band is received into the notches.

Assignees

• Karma Automotive Llc

Inventors

• Wang Yangfan
• Hong Jing

Classifications

• H01M50/148

  characterised by their shape · CPC title

• H01M50/502

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

• H01M50/116

  characterised by the material · CPC title

• H01M50/258

  Modular batteries; Casings provided with means for assembling · CPC title

• H01M10/647 Primary

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