By-pass for internally open-circuited cells

Details By-pass for internally open-circuited cells By-pass for internally open-circuited cells

1979-08-13

1981-02-24

Walton, Donald L.

Chemistry: electrical current producing apparatus, product, and

Regenerating, salvage or repair feature other than only...

429104, 429121, 429150, 337 21, 337331, H01M 200

Patent

active

042528690

ABSTRACT:
If one of a series string of battery cells fails on open circuit, the circuit through all of the cells is broken. An automatic means for by-passing the failed cell maintains the circuit and allows operation of the string to continue (at a lower no-lead voltage). The potential difference across the failed cell is utilized to heat a body of a conductive liquid so that it expands, ruptures the ampoule containing it and fills the gap between two conductors, thereby completing a shunt circuit.

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patent: 4097220 (1978-06-01), Cote
Hornstra et al., High-Performance Batteries for Off-Peak Energy Storage and Electric-Vehicle Propulsion, Progress Report for Jul.-Sep. 1976, Argonne National Laboratory.
NASA, Technical Brief, LEW-12039, 1976, NTN-77/0584.

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