Electrochemical energy storage cell

• US 8,029,925 B2
• Filed: 09/05/2006
• Issued: 10/04/2011
• Est. Priority Date: 09/02/2005
• Status: Active Grant

• Current Assignee: Bayerische Motoren Werke AG, BMW AG (Bayerische Motoren Werke AG)
• Original Assignee: Bayerische Motoren Werke AG
• Inventors: Fenkart, Marcel, Froeschl, Joachim
• Primary Examiner(s): Crepeau; Jonathan
• Assistant Examiner(s): DOUYETTE, KENNETH J
• Application Number:
  US11/514,944
• Publication Number:
  US 20070054156A1
• Time in Patent Office: 1,855 Days
• Field of Search: 429/61.7, 429/92, 429/100, 429/99, 429/9, 429/54, 429/50, 429/20, 429/90, 429/97, 429/7, 429/177, 429/178, 429/62, 320/116, 320/136, 180/65.29
• US Class Current: 429/61
• CPC Class Codes: H01G 11/10 Multiple hybrid or EDL capacitors, e.g. arrays or modules housings, cases, encapsulations or mountings thereof H01G11/78
• CPC Class Codes: H01G 11/82 Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
• CPC Class Codes: H01G 2/08 Cooling arrangements; Heating arrangements; Ventilating arrangements
• CPC Class Codes: H01G 2/106 Fixing the capacitor in a housing
• CPC Class Codes: H01G 9/08 Housing; Encapsulation
• CPC Class Codes: H01M 10/425 Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing printed circuits H05K1/00
• CPC Class Codes: H01M 10/486 for measuring temperature
• CPC Class Codes: H01M 10/613 Cooling or keeping cold
• CPC Class Codes: H01M 10/625 Vehicles
• CPC Class Codes: H01M 10/643 Cylindrical cells
• CPC Class Codes: H01M 10/654 located inside the innermost case of the cells, e.g. mandrels, electrodes or electrolytes
• CPC Class Codes: H01M 10/6556 Solid parts with flow channel passages or pipes for heat exchange closed pipes H01M10/6552
• CPC Class Codes: H01M 50/317 Re-sealable arrangements
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 60/13 Energy storage using capacitors
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

An electrochemical energy storage cell is provided, in particular an accumulator or a double layer capacitor. In the energy storage cell a core tube, which is open on its two ends, runs through the energy storage cell. Leads may be disposed inside the core tube and gaseous decomposition products, issuing from the energy storage cell, may be vented through the core tube. Furthermore, a cooling of the energy storage cell may take place by way of the core tube. An electronic circuit arranged in the cell monitors parameters of the energy storage cell.

Claims

1. An electrochemical energy store comprising an energy storage cell, the energy storage cell comprising:

a housing formed by an outer tube and an outer cover and a core tube and an inner cover, the core tube extending through the energy storage cell and being open at both ends and electrically insulated from the outer tube;

an electronic circuit arranged on the inner cover, the electronic circuit being operatively configured to at least one of control and monitor the energy storage cell; and

at least one cooling rib arranged in the core tube,

wherein

the outer tube is electrically connected to the outer cover and at least one of the outer tube and the outer cover is in electrical communication with an energy storage material within the energy storage cell such that the outer cover serves as a first terminal of the energy storage cell,

the core tube is electrically connected to the inner cover and at least one of the core tube and the inner cover is in electrical communication with the energy storage material within the energy storage cell such that the inner cover serves as a second terminal of the energy storage cell,

the inner cover extends transversely from the inner tube at one end of the energy storage cell and the outer cover extends transversely from the outer tube at an other end of the energy storage cell,

the outer cover and the inner cover are configured to allow serial conduction of energy between adjacent energy storage cells, and

the at least one cooling rib divides an interior region into at least two channels.

2. The electrochemical energy store according to claim 1, wherein the electronic circuit monitors a temperature of at least one of the energy storage cell, the core tube, and a channel formed by an interior of the core tube.

3. The electrochemical energy store according to claim 1, wherein the electronic circuit monitors at least one of a voltage of the energy storage cell, a voltage of connection leads of the cell, and a current of the cell.

4. The electrochemical energy store according to claim 1, wherein the electronic circuit monitors a pressure of at least one of the energy storage cell and the core tube.

5. The electrochemical energy store according to claim 1, wherein the electronic circuit measures a throughflow of a gas or gas mixture present in the core tube.

6. The electrochemical energy store according to claim 1, wherein the electronic circuit monitors an occurrence of a specific gas or gas mixture in the core tube.

7. The electrochemical energy store according to claim 1, wherein the electronic circuit comprises at least one sensor for measuring at least one of a cell temperature, a temperature in the core tube, a cell voltage, a voltage of a connection lead of the cell, a current taken from the cell, a pressure in the cell, a pressure in the core tube, a throughflow of a gas or a gas mixture present in the core tube, and a chemical composition or occurrence of a gas or gas mixture present in the core tube.

8. The electrochemical energy store according to claim 1, wherein the core tube forms a connection lead of the energy storage cell.

9. The electrochemical energy store according to claim 1, wherein the core tube and/or at least one lead arranged in the core tube, comprise at least one lead of a databus.

10. The electrochemical energy store according to claim 1, further comprising at least one guide element for at least one lead, which is arranged in the core tube and by which the core tube is not closed.

11. The electrochemical energy store according to claim 1, wherein the at least one cooling rib arranged in the core tube to divide the interior region is configured to seal the at least two channels from one another.

12. The electrochemical energy store according to claim 1, further comprising at least one overpressure valve leading into the core tube.

13. The electrochemical energy store according to claim 1, wherein the energy store cell is one of an accumulator and a double layer capacitor.

14. The electrochemical energy store according to claim 1, further comprising:

at least one additional energy storage cell arranged in series on the energy storage cell;

a sealed channel being formed by the core tube of each energy storage cell;

inner and outer seals of the energy storage cell and the additional energy storage cell electrically insulating the core tubes and outer tubes of the adjacent cells.

15. The electrochemical energy store according to claim 14, wherein the electronic circuit of one energy storage cell operates as a slave circuit and the electronic circuit of another cell operates as a master circuit.

16. The electrochemical energy store according to claim 15, wherein the master circuit is coupled to an electrical system of a vehicle.

17. The electrochemical energy store according to claim 16, wherein the electrical system of the vehicle includes a vehicle supply voltage and a databus.

18. The electrochemical energy store according to claim 14, wherein at least one of the electronic circuits of the energy storage cell and the additional energy storage cell monitors a tightness of the sealed channel formed by the core tubes.

19. The electrochemical energy store according to claim 14, wherein four energy storage cells each being one of an accumulator or double layer capacitor, are arranged in series.