Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1981-03-06
1983-06-14
Hickey, R. J.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
320 48, 31311, 320 35, 324425, H02J 700
Patent
active
043885837
ABSTRACT:
Disclosed herein is an apparatus for charging a battery including a case containing at least one cell formed of a pair of electrodes immersed in an electrolyte. The apparatus includes a transducer associated with the battery and operable without sensing gas pressure in the battery case for providing a variable signal output in response to electrolyte gassing within the battery case. The apparatus also includes a control circuit arrangement coupled to the signal output for providing a variable control output in response to the signal output, and a battery charger connected to the battery electrodes and operable for charging the battery at a rate subject to the variable control output. In one embodiment of the invention, the transducer is a sound transducer, preferably a ceramic microphone, which provides a variable signal output in response to sound generated within the battery case. In another embodiment, the transducer is a fluid vibration transducer, preferably utilizing a piezo-electric element, which provides a variable signal output in response to fluid vibration in the battery electrolyte. In another embodiment, the battery charger includes a battery temperature detector, preferably utilizing a thermistor, which prevents the battery charger from charging the battery when the temperature of the battery electrolyte exceeds a predetermined upper limit or electrolyte level is low.
REFERENCES:
patent: 2514235 (1950-07-01), Genin et al.
patent: 2571899 (1951-10-01), Kroft et al.
patent: 3123758 (1964-03-01), Giacalone
patent: 3798528 (1974-03-01), Molyneux
patent: 3855516 (1974-12-01), Fairchild
patent: 4016473 (1977-04-01), Newman
patent: 4031451 (1977-06-01), Gordon
patent: 4240747 (1980-12-01), Harmer
Hickey R. J.
Outboard Marine Corporation
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