High-voltage energy storage module and method for producing the high-voltage energy storage module

Patent metadata

Field	Value
Publication number	US-9923184-B2
Application number	US-201514835940-A
Country	US
Kind code	B2
Filing date	Aug 26, 2015
Priority date	Feb 27, 2013
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

A high-voltage energy storage module for supplying a voltage, in particular to a motor vehicle, includes at least two storage cells and at least one electrically conductive connection between two poles of different storage cells. The individual connection consists of multiple adjacently arranged bonding wires, and each bonding wire is secured to the two poles by means of a wire bonding.

First claim

What is claimed is:

1. A high-voltage energy storage module for supplying voltage, comprising:
at least two storage cells; and
at least one electrically conductive connection between two poles of different storage cells, wherein
the at least one electrically conductive connection comprises a plurality of bonding wires arranged one next to the other, each bonding wire being attached to the two poles via wire bonding.

2. The high-voltage energy storage module according to claim 1 , further comprising:
a circuit board arranged on the at least two storage cells, the circuit board comprising electronics designed to monitor the storage cells.

3. The high-voltage energy storage module according to claim 2 , wherein
at least one of the plurality of bonding wires is attached on the circuit board via wire bonding between the two poles of the different storage cells.

4. The high-voltage energy storage module according to claim 2 , further comprising:
at least one additional bonding wire connecting one of the two poles to the circuit board, the at least one additional bonding wire being attached to the one of the two poles and to the circuit board via wire bonding at respective ends thereof.

5. The high-voltage energy storage module according to claim 3 , further comprising:
at least one additional bonding wire connecting one of the two poles to the circuit board, the at least one additional bonding wire being attached to the one of the two poles and to the circuit board via wire bonding at respective ends thereof.

6. The high-voltage energy storage module according to claim 3 , further comprising:
a temperature sensor as at least part of the electronics, the temperature sensor being arranged on the circuit board at an attachment point of the bonding wire to the circuit board, wherein
the temperature sensor is designed to determine a temperature of the storage cell passed on via the bonding wire.

7. The high-voltage energy storage module according to claim 4 , further comprising:
a temperature sensor as at least part of the electronics, the temperature sensor being arranged on the circuit board at an attachment point of the additional bonding wire to the circuit board, wherein
the temperature sensor is designed to determine a temperature of the storage cell passed on via the additional bonding wire.

8. The high-voltage energy storage module according to claim 2 , wherein all poles of the at least two storage cells are oriented on one side of the high-voltage energy storage module, and
the circuit board is configured to rest on said one side.

9. The high-voltage energy storage module according to claim 2 , further comprising:
a metal element arranged on the circuit board and having a connecting device for a cable; and
an electrically conductive connection extending between one pole of a respective storage cell and the metal element, wherein
the electrically conductive connection comprises a plurality of bonding wires arranged one next to the other, each bonding wire being attached to the one pole and to the metal element via wire bonding.

10. The high-voltage energy storage module according to claim 9 , wherein the metal element is an aluminum panel.

11. The high-voltage energy storage module according to claim 6 , further comprising:
a metal element arranged on the circuit board and having a connecting device for a cable; and
an electrically conductive connection extending between one pole of a respective storage cell and the metal element, wherein
the electrically conductive connection comprises a plurality of bonding wires arranged one next to the other, each bonding wire being attached to the one pole and to the metal element via wire bonding.

12. The high-voltage energy storage module according to claim 1 , wherein
the plurality of bonding wires each have a round cross-section with a maximum diameter of one millimeter.

13. The high-voltage energy storage module according to claim 1 , wherein
the plurality of bonding wires each have a round cross-section with a maximum diameter of 500 μm.

14. The high-voltage energy storage module according to claim 1 , wherein
the plurality of bonding wires, in aggregate, are ribbon-shaped and have a maximum width of 3 millimeters.

15. The high-voltage energy storage module according to claim 1 , wherein
the plurality of bonding wires, in aggregate, are ribbon-shaped and have a maximum width of 2 millimeters.

16. The high-voltage energy storage module according to claim 1 , wherein the energy storage module is configured for a motor vehicle.

17. A method for producing a high-voltage energy storage module for supplying voltage in a motor vehicle, the method comprising the acts of:
providing at least two storage cells; and
forming at least one electrically conductive connection between two poles of different ones of the at least two storage cells,
wherein the act of forming the at least electrically conductive connection is carried out by wire-bonding a plurality of bonding wires to both of the two poles to form an individual connection.

18. The method according to claim 17 , wherein the wire bonding is carried out by applying one of pressure, ultrasound or an increased temperature.

19. The method according to claim 17 , further comprising the act of:
wire-bonding at least one of the plurality of bonding wires to a circuit board of the high-voltage energy storage module at a location between ends of the at least one bonding wire that are wire bonded to the poles of the different storage cells.

20. The method according to claim 17 , further comprising the act of:
wire-bonding an additional bonding wire at one end to one pole of a respective storage cell and at another end to a circuit board of the high-voltage energy storage module.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• De Arroyabe Jose Lopez
• Gaubatz Karl-Heinz

Classifications

• B23K20/004 Primary

  Wire welding · CPC title

• B23K2101/38

  Conductors · CPC title

• B60L2240/545

  Temperature · CPC title

• B60L50/64

  Constructional details of batteries specially adapted for electric vehicles · CPC title

• B60L2270/145

  Structure borne vibrations · CPC title