Method for manufacturing lithium-ion battery modules and a corresponding lithium-ion battery module

Patent metadata

Field	Value
Publication number	US-9705156-B2
Application number	US-201314397744-A
Country	US
Kind code	B2
Filing date	Mar 11, 2013
Priority date	Apr 30, 2012
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

A method for manufacturing lithium-ion battery modules, including the following: positioning an elastic plastic device between at least two cells of a battery module; path-controlled compression of the at least two cells of the battery module and of the elastic plastic device situated between the at least two cells. Also described is a corresponding lithium-ion battery module.

First claim

What is claimed is:

1. A method for manufacturing a lithium-ion battery module, the method comprising:
positioning an elastic plastic device between at least two cells of a prismatic cell stack of a battery module; and
providing path-controlled compression of the at least two cells of the battery module, and of the elastic plastic device situated between the at least two cells; and
providing a pressure band, a pressure plate and a cooling element;
wherein the path-controlled compression is provided in a longitudinal direction L of the lithium-ion battery module and is carried out along a set path P up to a defined endpoint, and
wherein the longitudinal direction L and the set path P are arranged parallel to each other, and
wherein a plastic component of the elastic plastic device is configured to compensate for variation in a thickness of the cells as the cells age after the cells are manufactured, if at least two compressed cells become thicker.

2. The method of claim 1 , wherein a plurality of cells, each including an elastic plastic device, is path-controlled compressed between two adjoining cells.

3. The method of claim 1 , wherein the elastic plastic device is an elastic plastic film.

4. The method of claim 3 , wherein the elastic plastic film is expanded graphite.

5. The method of claim 1 , wherein the shape of the cells is at least one of prismatic and round.

6. The method of claim 1 , wherein the elastic plastic device used is a purely plastic film in combination with at least one elastic element.

7. A lithium-ion battery module, comprising:
at least two compressed cells of a prismatic cell stack; and
an elastic plastic device situated between the at least two cells;
wherein there is a path-controlled compression of the at least two cells of the battery module, and of the elastic plastic device situated between the at least two cells,
wherein the path-controlled compression is provided in a longitudinal direction L of the lithium-ion battery module and is carried out along a set path P up to a defined endpoint,
wherein the longitudinal direction L and the set path P are arranged parallel to each other, and
wherein the module includes a pressure band, a pressure plate and a cooling element, and
wherein a plastic component of the elastic plastic device is configured to compensate for variation in a thickness of the cells as the cells age after the cells are manufactured, if at least two compressed cells become thicker.

8. The lithium-ion battery module of claim 7 , wherein the elastic plastic device is an elastic plastic film.

9. The lithium-ion battery module of claim 8 , wherein the elastic plastic film is expanded graphite.

10. The lithium-ion battery module of claim 7 , wherein the shape of the cells is at least one of prismatic and round.

11. The lithium-ion battery module of claim 7 , wherein a purely plastic film is used in combination with at least one elastic element as the elastic plastic device.

Assignees

• Bosch Gmbh Robert

Inventors

• Dorsch Niko

Classifications

• H01M50/291

  characterised by their shape · CPC title

• H01M50/293

  characterised by the material · CPC title

• H01M10/0481

  Compression means other than compression means for stacks of electrodes and separators · CPC title

• H01M10/0525 Primary

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• Y10T29/49108

  Electric battery cell making · CPC title