Electrical energy storage module and method for producing an electrical energy storage module

Patent metadata

Field	Value
Publication number	US-9595704-B2
Application number	US-201314646053-A
Country	US
Kind code	B2
Filing date	Nov 18, 2013
Priority date	Nov 20, 2012
Publication date	Mar 14, 2017
Grant date	Mar 14, 2017

Abstract

The invention provides an electrical energy storage module ( 100 ), comprising: at least one storage cell stack ( 10 ), comprising: a plurality of energy storage cells ( 1 ), which each have a cell housing ( 1 a ) each having two pole connections ( 1 b, 1 c ), wherein the energy storage cells ( 1 ) are arranged in series in the storage cell stack ( 10 ) in such a way that in each case a first pole connection ( 1 b ) and a second pole connection ( 1 c ) having different polarities of two adjacent energy storage cells ( 1 ) are galvanically connected to one another by means of flat cell connecting elements ( 4 ), wherein the cell housings ( 1 a ) of all of the energy storage cells ( 1 ) are galvanically connected to one another, wherein the first pole connection ( 1 b ) of an energy storage cell ( 1 ) arranged at a first end of the storage cell stack ( 10 ) is galvanically connected to the cell housing ( 1 a ), and wherein the second pole connection ( 1 c ) of an energy storage cell ( 1 ) arranged at a second end of the storage cell stack ( 10 ) and the cell housings ( 1 a ) each have a flat return conductor ( 5 ).

First claim

What is claimed is:

1. An electrical energy storage module comprising:
a storage cell stack including
a plurality of energy storage cells each having a cell housing, a first pole connection, and a second pole connection, wherein the first pole connection and the second pole connection have different polarities, all the first pole connections have the same polarity, and all the second pole connections have the same polarity, wherein the plurality of energy storage cells are arranged in series, wherein the cell housings of all of the plurality of energy storage cells are electrically connected to one another, wherein the plurality of energy storage cells includes a first energy storage cell at a first end of the storage cell stack and a second energy storage cell at a second, opposite end of the storage cell stack, wherein the first end is opposite the second and, wherein the first pole connection of the first energy storage cell is electrically connected to the cell housing of one of the plurality of energy storage cells, and
a plurality of flat cell connection elements,
wherein, for each adjacent pair of energy storage cells, the first pole connection of one of the adjacent pair of energy storage cells is electrically connected to the second pole connection of the other of the adjacent pair of energy storage cells by one of the plurality of flat cell connection elements;

a first flat return conductor directly electrically connected to the second pole connection of the second energy storage cell; and
a second flat return conductor directly electrically connected to the cell housing of one of the plurality of energy storage cells.

2. The energy storage module as claimed in claim 1 , wherein each of the energy storage cells of the plurality of energy storage cells are identically designed.

3. The energy storage module as claimed in claim 2 , wherein the first pole connection of the first energy storage cell has a flat cell connection element which is electrically connected to the cell housing of the first energy storage cell.

4. The energy storage module as claimed in claim 1 , wherein the first pole connection of the first energy storage cell is directly electrically connected to the cell housing of the first energy storage cell.

5. The energy storage module as claimed in claim 1 , wherein an insulating layer is formed between the first flat return conductor the cell housing of the second energy storage cell.

6. The energy storage module as claimed in claim 1 , wherein a fixing element is provided as the second flat return conductor, and wherein the fixing element is directly electrically connected to the cell housings of each of the plurality of energy storage cells.

7. The energy storage module as claimed in claim 6 , wherein the fixing element is a metal tension belt positioned about the plurality of energy storage cells.

8. The energy storage module as claimed in claim 6 , wherein a predefined pressing force is exerted on the fixing element so that a contact junction between the cell housings is optimized in terms of a total nonreactive resistance of a return line via the cell housings.

9. The energy storage module as claimed in claim 1 , wherein the electrical connections between the first and second pole connections and the cell connection elements are welded connections.

10. The energy storage module as claimed in claim 1 , wherein an insulating layer is applied to surfaces of the cell housing which do not border any surfaces of the cell housings of adjacent energy storage cells.

11. The energy storage module as claimed in claim 1 , wherein the first pole connection of the first storage cell is electrically connected to the cell housing of the first storage cell.

12. The energy storage module as claimed in claim 1 , wherein the first pole connection of the first storage cell is electrically connected to the cell housing of the first storage cell by a flat cell connection element.

13. The energy storage module as claimed in claim 1 , wherein the second flat return conductor is directly electrically connected to the cell housing of the second energy storage cell.

14. The energy storage module as claimed in claim 1 , wherein the first pole connections are positive, and wherein the second pole connections are negative.

15. The energy storage module as claimed in claim 1 , wherein the first pole connection and the second pole connection are electrically insulated from the pole housing of their respective energy storage cell.

Assignees

• Bosch Gmbh Robert

Inventors

• Tiefenbach Andy
• Proepper Thomas
• Kessler Martin

Classifications

• H01G11/76 Primary

  specially adapted for integration in multiple or stacked hybrid or EDL capacitors · CPC title

• H01M50/566

  by welding, soldering or brazing · CPC title

• H01M50/503

  characterised by the shape of the interconnectors · CPC title

• H01M50/209

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

• H01M50/51

  Connection only in series · CPC title