Energy storage device

• US 20100149757A1
• Filed: 12/02/2009
• Published: 06/17/2010
• Est. Priority Date: 12/04/2008
• Status: Active Grant

• Current Assignee: Flextronics International Limited
• Original Assignee: Stribel Production GmbH (Howmet Aerospace, Inc.)
• Inventors: Stengel, Peter
• Granted Patent: US 8,780,566 B2
• Time in Patent Office: Days
• US Class Current: 361/728
• CPC Class Codes: B29C 65/1435 at least passing through one of the parts to be joined, i.e. transmission welding
• CPC Class Codes: B29C 65/16 Laser beams
• CPC Class Codes: B29C 65/1635 at least passing through one of the parts to be joined, i.e. laser transmission welding
• CPC Class Codes: B29C 66/542 joining hollow covers or hollow bottoms to open ends of container bodies
• CPC Class Codes: H01M 16/00 Structural combinations of different types of electrochemical generators
• CPC Class Codes: H02J 7/345 using capacitors as storage or buffering devices
• CPC Class Codes: H05K 5/066 sealed by fusion of the joining parts without bringing material; sealed by brazing
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

With the objective of improving an energy storage device comprising a transducer unit and a capacitor module which interacts with the transducer unit so it can be inserted as a physical device into a motor vehicle in particular, it is proposed to provide a housing to accommodate the capacitor cells of the capacitor module, for the housing to comprise a capacitor chamber accommodating the capacitor cells, and for the capacitor chamber to have a gas-tight seal.

Claims

1. An energy storage device (10) comprising a transducer unit (34) and a capacitor module (22) which interacts with the transducer unit (34), characterized in that a housing (40) is provided to accommodate the capacitor cells (24) of the capacitor module (22), that the housing (40) comprises a capacitor chamber (42) accommodating the capacitor cells (24), and that the capacitor chamber (42) has a gas-tight seal.

2. The energy storage device according to claim 1, characterized in that a sorption material (124) is arranged in the capacitor chamber (42) for the chemical substances leaking from the capacitor cells (24).

3. The energy storage device according to claim 2, characterized in that the sorption material (124) is made from an organic polymer.

4. The energy storage device according to claim 2, characterized in that the sorption material (124) is part of a filler material (122) provided in the capacitor chamber (42).

5. The energy storage device according to claim 4, characterized in that the sorption material (124) is integrated into a filler material padding (126).

6. The energy storage device according to claim 1, characterized in that the housing (40) exhibits a housing shell (50) having a volume, which at least partly accommodates the capacitor chamber (42), extending inward from an opening (56) in said housing shell (50).

7. The energy storage device according to claim 6, characterized in that the volume wholly accommodates the capacitor chamber (42).

8. The energy storage device according to claim 6, characterized in that the opening (56) can be sealed by a cover (60) so as to be gas-tight.

9. The energy storage device according to claim 6, characterized in that the cover (60) can be connected to the housing shell (50) by means of an adhesive bond.

10. The energy storage device according to claim 9, characterized in that the cover (60) and the housing shell (50) are welded together.

11. The energy storage device according to claim 9, characterized in that the housing shell (50) or the cover (60) exhibits a meltable bead area (82) for producing the adhesive bond.

12. The energy storage device according to claim 11, characterized in that the cover (60) overlaps the bead area (82) by means of an edge strip (84) and that the edge strip (84) is of a material transparent to radiation for melting the bead area (82).

13. The energy storage device according to claim 1, characterized in that the cover (60) can be connected to the housing shell (50) in a central area (100) by means of at least one anchoring element (104).

14. The energy storage device according to claim 13, characterized in that the anchoring element (104) is a screw anchor (106).

15. The energy storage device according to claim 14, characterized in that the screw anchor (106) projects through the cover (60) to seal same.

16. The energy storage device according to claim 1, characterized in that the transducer unit (34) is arranged outside of the capacitor chamber (42).

17. The energy storage device according to claim 16, characterized in that the transducer unit (34) is arranged in a circuit chamber in the same housing (40).

18. The energy storage device according to claim 16, characterized in that the capacitor module (22) is connected to the transducer unit (34) by means of high-current contacts (70).

19. The energy storage device according to claim 18, characterized in that the high-current contacts (70) lead out of the capacitor chamber (42) in gas-tight manner.