Energy storage module comprising a plurality of prismatic storage cells and method for production thereof

Patent metadata

Field	Value
Publication number	US-9882177-B2
Application number	US-201314052202-A
Country	US
Kind code	B2
Filing date	Oct 11, 2013
Priority date	May 27, 2011
Publication date	Jan 30, 2018
Grant date	Jan 30, 2018

Abstract

The invention relates to an energy storage module for a device for supplying voltage, in particular, of a motor vehicle, comprising a plurality of in particular prismatic storage cells, which are stacked together at least in one row, are arranged one behind the other and are braced between at least two end plates by means of at least one tie rod or a wrapping, wherein at least one of the end plates comprises a layer structure of at least three layers and/or the tie rod consists of a fiber composite material.

First claim

What is claimed is:

1. An energy storage module for a device for supplying voltage to a motor vehicle, the energy storage module comprising:
a plurality of prismatic storage cells, stacked in at least one row, and arranged behind one another;
at least two end plates configured to brace the prismatic storage cells therebetween, wherein at least one of the at least two end plates comprises at least three layers, wherein the at least three layers are each formed entirely of a fiber composite material exclusive of interspersing material; and
a coupler, including at least one of a tie rod and a wrapping completely surrounding the energy storage module, the coupler configured to couple the at least two end plates so as to brace the storage cells therebetween, the coupler consisting of a fiber composite material.

2. The energy storage module according to claim 1 , wherein the at least two end plates have the layer structure of at least three layers.

3. The energy storage module according to claim 1 , wherein the layer structure comprises:
a first outer layer,
a second outer layer, and
at least one inner layer sandwiched between and coincident with the first and second outer layers,
wherein at least one outer layer or at least one inner layer consists of a fiber composite material.

4. The energy storage module according to claim 1 , wherein the coupler comprises at least one tie rod, and wherein the end plates and the at least one tie rod consist of a fiber composite material.

5. The energy storage module according to claim 1 , wherein the wrapping comprises:
an additional bracing element at least partially surrounding the stacked storage cells as well as the end plates, and
a fiber composite material at least partially surrounding the additional bracing element.

6. The energy storage module according to claim 1 , wherein the fiber composite material comprises one of: a thermoplastic matrix with fibers or a durometric matrix with fibers.

7. The energy storage module according to claim 4 , wherein the fiber composite material comprises one of: a thermoplastic matrix with fibers or a durometric matrix with fibers.

8. The energy storage module according to claim 6 , wherein the fibers are selected from the group consisting of: glass fibers, carbon fibers, mineral fiber, plant fibers, ceramic fiber, steel fibers, and synthetic fibers.

9. The energy storage module according to claim 8 , wherein the fibers are unidirectional fibers.

10. The energy storage module according to claim 1 , wherein at least one of the end plates and the tie rod have at least one of a fastening element and a floor fastening element.

11. The energy storage module according to claim 3 , wherein at least one of the end plates and the tie rod have at least one of a fastening element and a floor fastening element.

12. The energy storage module according to one claim 1 , wherein the end plates are connected with the tie rod in one of a screwed manner, an upset manner, a welded manner, by means of at least one clip and by means of a reshaping.

13. A fiber composite material for producing at least one of an end plate and a tie rod of the energy storage module according to claim 1 .

14. The energy storage module according to claim 1 , wherein the at least three layers comprises an inner layer sandwiched between and coincident with a first outer layer and a second outer layer, and wherein the inner layer is formed by an injection-molding material containing fibers.

15. The energy storage module according to claim 14 , wherein the injection-molding material comprising the inner layer comprises a homogeneous distribution of fibers.

16. A method of producing an energy storage module for a device for supplying voltage to a motor vehicle, the energy storage module comprising: a plurality of prismatic storage cells stacked in at least one row and arranged behind one another, wherein the method comprises:
providing at least one end plate having at least three layers, wherein the at least three layers consist of a fiber composite material,
providing a tie rod made of a fiber composite material,
providing one of: fastening elements or floor fastening elements, on at least one of the at least one end plate and tie rod,
mounting the at least one end plate, respectively, on an exposed face side of the prismatic storage cells disposed at the end of the stacked row of prismatic storage cells, and
bracing the end plates via one of: a wrapping and at least one tie rod, wherein the wrapping is configured to completely surround the energy storage module.

17. The method according to claim 16 , wherein the bracing takes place by means of the wrapping surrounding the energy storage module.

18. The method according to claim 17 , wherein the bracing by way of the wrapping further comprises:
mounting an additional bracing element which at least partially surrounds the cell module of stacked storage cells and end plates,
rotating the cell module equipped with the additional bracing element around a fiber band running through a resin bath, and
hardening the energy storage module.

19. The method according to claim 16 , wherein the at least three layers comprises an inner layer sandwiched between and coincident with a first outer layer and a second outer layer, and wherein the inner layer is formed by an injection-molding material containing fibers.

20. The method according to claim 19 , wherein the injection-molding material comprising the inner layer comprises a homogeneous distribution of fibers.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Thurmeier Markus
• Goesmann Hubertus
• Lustig Robert
• Vietze Eva
• Zuegner Stephan

Classifications

• H01M10/0481 Primary

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

• H01M50/229

  Composite material consisting of a mixture of organic and inorganic materials · CPC title

• H01M50/262

  with fastening means, e.g. locks · CPC title

• H01M50/249

  specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) · CPC title

• H01M50/209

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