Secondary battery cell interconnection for protection from inter

Details Secondary battery cell interconnection for protection from inter Secondary battery cell interconnection for protection from inter

1994-06-22

1996-03-05

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

Having polarity safety feature

429 7, 429 62, 429150, H01M 1046

Patent

active

054966540

ABSTRACT:
Protection from internal shorts for secondary batteries is provided by interconnecting secondary battery cells using circuitry that during discharge allows for current flow only in the discharge direction. On recharge, this circuitry is overridden to allow charging of the entire battery. A heat sensor may be used to stop this override during charging if an internal short develops during charging. More particularly, a multi-cell secondary battery includes multiple secondary battery cells connected in parallel and a unidirectional current valve connected in series with at least one of the secondary battery cells. The unidirectional current valve may be a diode, for example. Switching circuitry is connected in parallel with the unidirectional current valve to allow for recharging by bypassing the unidirectional current valve.

REFERENCES:
patent: 2624033 (1952-12-01), Jacquier
patent: 4770954 (1988-09-01), Noordenbos
patent: 5154985 (1992-10-01), Tanaka

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