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Battery venting system and method

United States Patent

January 5, 1999
View the Complete Patent at the US Patent & Trademark Office
Disclosed herein is a venting mechanism for a battery. The venting mechanism includes a battery vent structure which is located on the battery cover and may be integrally formed therewith. The venting mechanism includes an opening extending through the battery cover such that the opening communicates with a plurality of battery cells located within the battery case. The venting mechanism also includes a vent manifold which attaches to the battery vent structure. The vent manifold includes a first opening which communicates with the battery vent structure opening and second and third openings which allow the vent manifold to be connected to two separate conduits. In this manner, a plurality of batteries may be interconnected for venting purposes, thus eliminating the need to provide separate vent lines for each battery. The vent manifold may be attached to the battery vent structure by a spin-welding technique. To facilitate this technique, the vent manifold may be provided with a flange portion which fits into a corresponding groove portion on the battery vent structure. The vent manifold includes an internal chamber which is large enough to completely house a conventional battery flame arrester and overpressure safety valve. In this manner, the vent manifold, when installed, lessens the likelihood of tampering with the flame arrester and safety valve.
Casale; Thomas J. (Aurora, CO), Ching; Larry K. W. (Littleton, CO), Baer; Jose T. (Gaviota, CA), Swan; David H. (Monrovia, CA)
Optima Batteries, Inc. (Aurora, CO), Aerovironment, Inc. (Monrovia, CA)
08/ 888,478
July 7, 1997
CONTRACTUAL ORIGIN OF THE INVENTION The Government of the United States of America has rights in this invention pursuant to sub-contract ZCB-4-13032-10 (sub-sub-contract TCB01613) awarded by the U.S. Department of Energy.