Energy storage unit, particularly a battery module, and an energy storage system comprising a plurality of energy storage unit

Patent metadata

Field	Value
Publication number	US-11050106-B2
Application number	US-201515302444-A
Country	US
Kind code	B2
Filing date	Feb 24, 2015
Priority date	Apr 7, 2014
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

The invention relates to an energy storage unit (1) comprising a plurality of energy storage sub-units (5) that have a first electrode (6) and a second electrode (7), the first electrode (6) and second electrode (7) of a particular energy storage sub-unit (5) being arranged on opposite sides of said energy storage sub-unit (5), and said energy storage unit comprising a receiving device (2) that has a plurality of adjacently-arranged receiving units each spatially delimited by a lateral wall, one energy storage sub-unit (5) being introduced into each receiving unit of said receiving device (2), and the energy storage sub-units (5) being secured in said receiving units such that the electrodes (6, 7) are arranged in a first contact level and in a second contact level, the electrodes (6, 7) arranged in the first contact level being electrically interconnected by means of a first printed circuit board (10) and the electrodes (6, 7) arranged in the second contact level (9) being electrically interconnected by means of a second printed circuit board (11). The invention also relates to an energy storage system which comprises a plurality of electrically-interconnected energy storage units (1) according to the invention.

First claim

The invention claimed is:

1. An energy storage unit ( 1 ), comprising a plurality of energy storage subunits ( 5 ) each having a first electrode ( 6 ) and a second electrode ( 7 ), wherein the first electrode ( 6 ) and the second electrode ( 7 ) of a respective energy storage subunit ( 5 ) are arranged on opposite sides of the respective energy storage subunit ( 5 ), and the energy storage unit ( 1 ) also comprising a receiving device ( 2 ) having a plurality of receiving units ( 17 ) which are arranged next to one another and are each physically delimited by at least one side wall ( 18 ), wherein in each case one energy storage subunit ( 5 ) of the energy storage unit ( 1 ) is inserted into a receiving unit ( 17 ) of the receiving device ( 2 ), and the energy storage subunits ( 5 ) are fixed in the receiving units ( 17 ) in such a way that the first electrodes ( 6 ) are arranged in a first contact-making plane ( 8 ) and that the second electrodes ( 7 ) are arranged in a second contact-making plane ( 9 ) that is different than the first contact making plane ( 8 ), wherein the first electrodes ( 6 ) are electrically interconnected by means of at least one first printed circuit board ( 10 ) arranged in the first contact-making plane ( 8 ) and the second electrodes ( 7 ) are electrically interconnected by means of at least one second printed circuit board ( 11 ) arranged in the second contact-making plane ( 9 ), characterized in that the receiving device ( 2 ) comprises at least one first slot ( 19 ) into which at the first printed circuit board ( 10 ) is inserted to make contact with the first electrodes ( 6 ) which are arranged in the first contact-making plane ( 8 ).

2. The energy storage unit ( 1 ) as claimed in claim 1 , characterized in that the energy storage subunits ( 5 ) are fixed in the receiving units ( 17 ) by at least one cover element ( 3 ).

3. The energy storage unit ( 1 ) as claimed in claim 2 , characterized in that the at least one first printed circuit board ( 10 ) and/or the at least one second printed circuit board ( 11 ) at least partially form the at least one cover element ( 3 ).

4. The energy storage unit ( 1 ) as claimed in claim 1 , wherein the receiving device ( 2 ) comprises at least one second slot into which the second printed circuit board ( 11 ) is inserted to make contact with the second electrodes ( 7 ) which are arranged in the second contact-making plane ( 9 ).

5. The energy storage unit ( 1 ) as claimed in claim 4 , characterized in that the at least one first printed circuit board ( 10 ) and/or the at least one second printed circuit board ( 11 ) has contact-making elements ( 12 ), which are configured to have an elastically restoring action, for making contact with the electrodes ( 6 , 7 ), which are arranged in one contact-making plane ( 8 , 9 ), of the energy storage subunits ( 5 ) in such a way that the contact- making elements ( 12 ) are pushed down when the respective printed circuit board ( 10 , 11 ) is inserted into the respective slot ( 19 ), and the contact-making elements ( 12 ) make contact with the electrodes ( 6 , 7 ) under mechanical stress when the printed circuit board ( 10 ) is inserted.

6. The energy storage unit ( 1 ) as claimed in claim 1 , characterized in that the at least one first printed circuit board ( 10 ) and/or the at least one second printed circuit board ( 11 ) has contact lugs as contact-making elements ( 12 ), wherein the respective printed circuit board ( 10 , 11 ) in each case has an opening next to a contact lug in such a way that the respective contact lug protrudes into the opening region and the contact lugs are connected to the electrodes ( 6 , 7 ) by a welding process which is performed through the respective opening.

7. The energy storage unit ( 1 ) as claimed in claim 2 , characterized in that the energy storage unit ( 1 ) comprises, as the at least one cover element ( 3 ), at least one first cover element in which the at least one first printed circuit board ( 10 ) is arranged and/or comprises at least one second cover element in which the at least one second printed circuit board ( 11 ) is arranged.

8. The energy storage unit ( 1 ) as claimed in claim 1 , characterized in that a group ( 32 ) of receiving units ( 17 ) of the receiving device ( 2 ) in each case has at least one connecting element ( 27 ) by which the group ( 32 ) of receiving units ( 17 ) is connected to at least one further group ( 32 ) of receiving units ( 17 ) and/or by which the group ( 32 ) of receiving units ( 17 ) is configured to be connected to at least one further group ( 32 ) of receiving units ( 17 ).

9. The energy storage unit ( 1 ) as claimed in claim 1 , characterized in that the receiving device ( 2 ) or in each case one group ( 32 ) of receiving units ( 17 ) of the receiving device ( 2 ) is integrally produced by means of an injection-molding process.

10. The energy storage unit ( 1 ) as claimed in claim 1 , characterized in that groups ( 32 ) of receiving units ( 17 ) are respectively spaced apart from one another, wherein an intermediate space ( 23 ) is formed between adjacent groups ( 32 ) of receiving units ( 17 ), and wherein the intermediate space ( 23 ) is configured to conduct a coolant ( 22 ) for controlling the temperature of the energy storage subunits ( 5 ).

11. The energy storage unit ( 1 ) as claimed in claim 1 , characterized in that the at least one side wall ( 18 ) which in each case physically delimits a receiving unit ( 17 ) of the energy storage unit ( 1 ) is a temperature-control apparatus.

12. The energy storage unit ( 1 ) as claimed in claim 1 , characterized in that the energy storage unit ( 1 ) comprises a battery management system, wherein the battery management system is at least partially integrated into the at least one first printed circuit board ( 10 ) and/or into the at least one second printed circuit board ( 11 ).

13. The energy storage unit ( 1 ) as claimed in claim 1 , characterized in that the energy storage subunits ( 5 ) each comprise at least one electrochemical cell ( 25 ).

14. The energy storage unit ( 1 ) as claimed in claim 1 , characterized in that the receiving units ( 17 ) each form a cylindrical volumetric space into which at least one energy storage subunit ( 5 ), which is a round cell, is inserted.

15. The energy storage unit ( 1 ) as claimed in claim 1 , characterized in that the receiving units ( 17 ) each have, as a connecting element ( 27 ), a termination element, which, at opposite ends, projects beyond the at least one side wall ( 18 ), wherein the receiving units ( 17 ) are welded to the receiving device ( 2 ) by the termination elements.

16. The energy storage unit ( 1 ) as claimed in claim 1 , characterized in that the receiving device ( 2 ) has at least one sealing wall ( 24 ) which closes off intermediate spaces ( 23 ), which are located between the receiving units ( 17 ), to the outside in a sealed manner, wherein the receiving device ( 2 ) has connections ( 21 ) for supplying and for discharging a coolant ( 22 ) to and from the intermediate spaces ( 23 ).

17. The energy storage unit ( 1 ) as claimed in claim 1 , characterized in that the energy storage unit ( 1 ) has at least one connecting element ( 30 , 30 ′) for mechanical connection to at least one further energy storage unit ( 1 ) and/or at least one connecting element for electrically conductive connection to at least one further energy storage unit ( 1 ) and/or at least one connecting element for electrically conductive connection to an electrical load device.

18. An energy storage system comprisin

Assignees

• Bosch Gmbh Robert

Inventors

• Reinshagen Holger
• Kohlberger Markus
• Gerlach Martin
• Poller Silvan
• Austen Michael
• Kaiser Rudi
• Hore Sarmimala
• Bannert Sebastian
• Grasser Andreas
• Schubert Gerhard

Classifications

• H01M10/6557 Primary

  arranged between the cells · CPC title

• H01M50/224

  Metals · CPC title

• H01M50/289

  characterised by spacing elements or positioning means within frames, racks or packs (spacing elements inside cells other than separators, membranes or diaphragms H01M50/471) · CPC title

• H01M50/284

  with incorporated circuit boards, e.g. printed circuit boards [PCB] · CPC title

• H01M50/519

  comprising printed circuit boards [PCB] · CPC title