Energy storage unit having a plurality of galvanic cells, battery cell for an energy storage unit of this kind, and method for producing the battery cell

Patent metadata

Field	Value
Publication number	US-10439258-B2
Application number	US-201515124061-A
Country	US
Kind code	B2
Filing date	Feb 10, 2015
Priority date	Mar 7, 2014
Publication date	Oct 8, 2019
Grant date	Oct 8, 2019

Abstract

The present invention relates to an energy storage unit (1) having a plurality of electrochemical cells (2), wherein the electrochemical cells (2) each have a first outer face (3) comprising a first electrode (5), and a second outer face (4) comprising a second electrode (6), and the electrochemical cells (2) are electrically interconnected owing to the lined-up arrangement (9) of the electrochemical cells (2) by way of the outer faces (3, 4) by means of the electrodes (5, 6). The energy storage unit (1) additionally comprises a first frame element (7) and a second frame element (8), which frame elements are directly or indirectly connected to one another, wherein the first frame element (7) is arranged at one end (10) of the lined-up arrangement (9) of the electrochemical cells (2), and the second frame element (8) is arranged at the other end (11) of the lined-up arrangement (9) of the electrochemical cells (2). The present invention also relates to a battery cell (2) for use with an energy storage unit (1) according to the invention, and also to a method for producing a battery cell (2) of this kind.

First claim

The invention claimed is:

1. An energy storage unit ( 1 ) having a plurality of galvanic cells ( 2 ), wherein the galvanic cells ( 2 ) in each case have a first outer side ( 3 ) comprising a first electrode ( 5 ) and a second outer side ( 4 ) comprising a second electrode ( 6 ) and the galvanic cells ( 2 ) are electrically interconnected with one another by juxtaposition ( 9 ) of the galvanic cells ( 2 ) by way of the outer sides ( 3 , 4 ) via the electrodes ( 5 , 6 ), characterized in that the energy storage unit ( 1 ) comprises a first frame element ( 7 ) and a second frame element ( 8 ), which are directly or indirectly connected to one another, wherein the first frame element ( 7 ) is arranged at one end ( 10 ) of the juxtaposition ( 9 ) of the galvanic cells ( 2 ) and the second frame element ( 8 ) is arranged at the other end ( 11 ) of the juxtaposition ( 9 ) of the galvanic cells ( 2 ), the energy storage unit ( 1 ) further characterized in that at least one third frame element ( 12 ) which at least partly frames at least one galvanic cell ( 2 ) of the energy storage unit ( 1 ) is arranged between the first frame element ( 7 ) and the second frame element ( 8 ), wherein the first frame element ( 7 ) is connected to the second frame element ( 8 ) via the at least one third frame element ( 12 ).

2. The energy storage unit ( 1 ) as claimed in claim 1 , characterized in that the at least one third frame element ( 12 ) is arranged in each case between identically sized groups of electrically interconnected galvanic cells ( 2 ) of the energy storage unit ( 1 ).

3. The energy storage unit ( 1 ) as claimed in claim 1 , characterized in that the frame elements in each case have at least one fixing element, wherein adjacent frame elements are connected to one another in each case via the at least one fixing element.

4. The energy storage unit ( 1 ) as claimed in claim 1 , characterized in that the first frame element ( 7 ) and/or the second frame element ( 8 ) and/or the at least one third frame element ( 12 ) in each case have/has at least one contacting element ( 20 ), wherein the at least one contacting element ( 20 ) contacts at least one galvanic cell ( 2 ) of the energy storage unit ( 1 ) for detecting at least one parameter of the galvanic cell ( 2 ).

5. The energy storage unit ( 1 ) as claimed in claim 4 , characterized in that the first frame element ( 7 ) and/or the second frame element ( 8 ) and/or the at least one third frame element ( 12 ) in each case have/has at least one connection element ( 15 ) which is electrically conductively connected to the at least one contacting element ( 20 ), wherein the at least one connection element ( 15 ) is connected to a cell monitoring unit ( 19 ) and/or is connectable to a cell monitoring unit.

6. The energy storage unit ( 1 ) as claimed in claim 1 , characterized in that the first frame element ( 7 ) and/or the second frame element ( 8 ) and/or the at least one third frame element ( 12 ) comprise(s) a cell monitoring unit ( 19 ).

7. The energy storage unit ( 1 ) as claimed in claim 1 , characterized in that the first frame element ( 7 ) and/or the second frame element ( 8 ) and/or the at least one third frame element ( 12 ) are/is in each case a cooling device for regulating the temperature of at least one galvanic cell ( 2 ) of the energy storage unit ( 1 ).

8. The energy storage unit ( 1 ) as claimed in claim 1 , characterized in that the first frame element ( 7 ) and/or the second frame element ( 8 ) and/or the at least one third frame element ( 12 ) in each case comprise(s) at least one bearing element ( 23 ) which projects into an area ( 22 ) spanned by the frame element ( 7 , 8 , 12 ) and on which at least one galvanic cell ( 2 ) of the energy storage unit ( 1 ) bears by way of a bearing region ( 24 ) of the galvanic cell ( 2 ).

9. The energy storage unit ( 1 ) as claimed in claim 1 , characterized in that the energy storage unit ( 1 ) comprises at least one safety barrier ( 35 ) which is arranged between two adjacently arranged galvanic cells ( 2 ) of the energy storage unit ( 1 ), wherein the safety barrier ( 35 ) provides an electrically conductive connection ( 37 ) between said galvanic cells ( 2 ) and is configured to prevent a thermal chain reaction between said galvanic cells ( 2 ).

10. The energy storage unit ( 1 ) as claimed in claim 9 , characterized in that the at least one safety barrier ( 35 ) is furthermore configured as a cooling device for regulating the temperature of the galvanic cells ( 2 ) surrounding the safety barrier ( 35 ).

11. The energy storage unit ( 1 ) as claimed in claim 9 , characterized in that the at least one third frame element ( 12 ) is configured as the safety barrier ( 35 ).

12. A battery cell ( 2 ) for use with an energy storage unit ( 1 ) as claimed in claim 1 , wherein the battery cell ( 2 ) has at least one electrode arrangement ( 27 ) having at least one cathode ( 32 ) and at least one anode ( 33 ), said at least one electrode arrangement being surrounded by a first half-shell ( 28 ) and by a second half-shell ( 29 ), wherein the first half-shell ( 28 ) and the second half-shell ( 29 ) are connected via a linking region ( 42 ) and the first half-shell ( 28 ) comprises the first electrode ( 5 ) of the battery cell ( 2 ) and the second half-shell ( 29 ) comprises the second electrode ( 6 ) of the battery cell ( 2 ).

13. The battery cell ( 2 ) as claimed in claim 12 , characterized in that the first half-shell ( 28 ) comprises a first metallic foil ( 38 ) and the second half-shell ( 29 ) comprises a second metallic foil ( 39 ).

14. The battery cell ( 2 ) as claimed in claim 13 , characterized in that the battery cell ( 2 ) is configured in the manner of a pouch cell, wherein the first metallic foil ( 38 ) is shaped to form the first half-shell ( 28 ) by means of a deep-drawing method, and the second metallic foil ( 39 ) is shaped to form the second half-shell ( 29 ) by means of a deep-drawing method.

15. The battery cell ( 2 ) as claimed in claim 13 , characterized in that the cathode ( 32 ) of the at least one electrode arrangement ( 27 ) is electrically conductively connected to the first half-shell ( 28 ) and the anode ( 33 ) of the at least one electrode arrangement ( 27 ) is electrically conductively connected to the second half-shell ( 29 ), wherein at least one insulator element ( 30 ) is arranged between the first half-shell ( 28 ) and the second half-shell ( 29 ) in the linking region ( 42 ) in such a way that the first half-shell ( 28 ) is electrically insulated from the second half-shell ( 29 ).

16. The battery cell ( 2 ) as claimed in claim 13 , characterized in that the electrode arrangement ( 27 ) is surrounded by an electrically nonconductive inner layer ( 43 ), to which the first half-shell ( 28 ) and the second half-shell ( 29 ) are adjacent toward the outside.

17. The battery cell ( 2 ) as claimed in claim 16 , characterized in that the cathode ( 32 ) of the at least one electrode arrangement ( 27 ) is electrically conductively connected to the first half-shell ( 28 ) via a first connecting element ( 31 ) and the anode ( 33 ) of the at least one electrode arrangement ( 27 ) is electrically conductively connected to the second half-shell ( 29 ) via a second connecting element ( 31 ′), wherein the first connecting element ( 31 ) and the second connecting element ( 31 ′) are led out from the inner layer ( 43 ) and the half-shells ( 28 , 29 ) of the battery cell ( 2 ) and the first connecting element ( 31 ) electrically conductively contacts the first half-shell ( 28 ) on the outer side ( 3 )

Assignees

• Bosch Gmbh Robert

Inventors

• Kaiser Rudi
• Poller Silvan
• Reinshagen Holger
• Boehme Jens
• Fetzer Joachim
• Gerlach Martin
• Austen Michael
• Hore Sarmimala

Classifications

• H01M10/0418 Primary

  with bipolar electrodes · CPC title

• H01M10/486 Primary

  for measuring temperature · CPC title

• H01M50/224

  Metals · CPC title

• H01M50/209

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

• H01M10/0486

  Frames for plates or membranes · CPC title