Battery

• US 6,355,373 B1
• Filed: 12/21/1998
• Issued: 03/12/2002
• Est. Priority Date: 06/21/1996
• Status: Expired due to Fees

• Current Assignee: Stadtwerke Karlsruhe GmbH (EnBW Energie Baden Württemberg AG), Energie Baden-Wã¼Rttemberg AG, ZOXY Energy Systems AG
• Original Assignee: Stadtwerke Karlsruhe GmbH (EnBW Energie Baden Württemberg AG), Energie Baden-Wã¼Rttemberg AG, ZOXY Energy Systems AG
• Inventors: Pauling, Hans Juergen
• Primary Examiner(s): Kalafut, Stephen
• Assistant Examiner(s): ALEJANDRO, RAYMOND
• Application Number:
  US09/202,725
• Time in Patent Office: 1,177 Days
• Field of Search: 429/75, 429/72, 429/74, 429/71, 429/61, 429/63, 429/64, 429/51, 429/50, 429/80, 429/81, 429/118, 429/163
• US Class Current: 429/75
• CPC Class Codes: H01M 2200/00 Safety devices for primary or secondary batteries
• CPC Class Codes: H01M 50/691 Arrangements or processes for draining liquids from casings; Cleaning battery or cell casings
• CPC Class Codes: H01M 50/70 Arrangements for stirring or circulating the electrolyte
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

The invention relates to a battery which, for maintenance or in a danger situation, can be simply and reliably transferred from an operative state into a safe, inoperative state, whilst avoiding a short circuit. This is either brought about in that a controlled operable draining device for the rapid draining of the electrolyte is provided and that following the draining of the electrolyte all power-generating processes are stopped. Alternatively a battery with such characteristics is created in that in the danger situation a line introduces a deactivating substance into the electrolyte, which stops all power-generating, electrolytic processes.

Claims

1. A battery comprising:

at least two electrodes in a first electrolyte compartment which, in an operating state of the battery, is filled with a liquid electrolyte that wets substantially the entire surfaces of the electrodes and are thereby in direct galvanic contact with one another;

an electric tap on the electrodes;

a second electrolyte compartment filled with electrolyte and positioned below said first compartment;

a connecting opening between said first and second compartment;

at least one controlled operable rapid draining device adapted to drain the electrolyte from the first and second electrolyte compartments;

wherein, following draining of the electrolyte from the first compartment, the electrodes are not wetted by electrolyte and are galvanically isolated from one another, and wherein the first electrolyte compartment is smaller than the second compartment to facilitate speed of removal of electrolyte from the first compartment.

2. The battery according to claim 1, further comprising at least one electrolyte collecting tank for receiving at least part of the electrolyte from the first and second electrolyte compartments.

3. The battery according to claim 1 wherein the second compartment has a substantially larger volume than the first compartment.

4. The battery according to claim 1 further comprising an exchange line provided for convective electrolyte exchange between the first compartment and the second compartment.

5. The battery according to claim 4, further comprising a device adapted to pump, stir, circulate or heat for producing the convective exchange of the electrolyte.

6. The battery according to claim 2 wherein the electrolyte collecting tank is positioned substantially below the first and second electrolyte compartments.

7. The battery according to claim 1 wherein the draining device has at least one electrically controllable closing device, for preventing an electrolyte flow between the electrolyte compartments and the electrolyte collecting tank in at least one direction.

8. The battery according to claim 7, wherein the closing device is a valve held open in the currentless state and is an, explosive bolt or has a predetermined breaking point.

9. The battery according to claim 1 further comprising a line provided to deliver electrolyte between the electrolyte collecting tank and the electrolyte compartments in at least one direction.

10. The battery according to claim 1 further comprising at least one controlled operable delivery device for delivering electrolyte between the electrolyte collecting tank and the electrolyte compartments.

11. The battery according to claim 10, wherein that the delivery device is constructed as a pump for expulsion of electrolyte from the electrolyte compartments.

12. The battery according to claim 1 wherein the draining device is provided an emergency drain opening with closure part.

13. The battery according to claim 1 further comprising a control device for controlling the delivery device and/or the valve means by control lines, the control device being constructed for detecting a signal of a danger situation and/or a user activation and that when the signal is detected it is possible to initiate draining of the electrolyte or deactivation of the electrolyte.

14. The battery according to claim 13, wherein the control device has at least one sensor means which is an acceleration sensor or a manually operable emergency cutout.

15. The battery according to claim 2 wherein the second compartment has a substantially larger volume than the first compartment.

16. The battery according to claim 10 wherein the delivery device is an expulsion device.

17. The battery according to claim 16 wherein the expulsion device is a gas pressure cartridge.