Chemistry: electrical current producing apparatus – product – and – With nonbattery electrical component electrically connected...
Patent
1996-01-29
1997-02-04
Skapars, Anthony
Chemistry: electrical current producing apparatus, product, and
With nonbattery electrical component electrically connected...
429 62, 429 81, 429 90, 429120, H01M 1050
Patent
active
055996361
ABSTRACT:
A battery heating device includes a temperature sensor and at least one heating element in a liquid and acid-proof arrangement inside the battery. The heating element is a power transistor secured to a cooling plate which is powered by the battery, the emitter of the power transistor being powered by a temperature control circuit when the battery temperature falls below a predetermined reference temperature and the battery voltage is higher than a lower threshold and lower than a higher threshold. A trigger circuit responds to a rise in battery voltage after the current in a load having a high current consumption is switched off. The trigger circuit actuates a timer circuit which conductively controls the power transistor for a set time if the battery voltage is under or at the lower threshold.
REFERENCES:
patent: 2431945 (1947-12-01), Little et al.
patent: 2516048 (1950-07-01), Endress
patent: 4383013 (1983-05-01), Bindin et al.
patent: 4604564 (1986-08-01), Windisch et al.
patent: 5385793 (1995-01-01), Tiedemann et al.
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