Electricity: battery or capacitor charging or discharging – One cell or battery charges another – Vehicle battery charging
Patent
1998-11-09
2000-12-26
Wong, Peter S.
Electricity: battery or capacitor charging or discharging
One cell or battery charges another
Vehicle battery charging
320105, 320144, H02J 700
Patent
active
061665169
ABSTRACT:
An electrical charging circuit for applying a controlled charge to a receiving device, such as a battery, and particularly such as a battery carried on a towed vehicle such as a trailer for actuating the trailer brakes during emergency situations such as unexpected disconnection from the towing vehicle, i.e., break-away. In a basic sense, the charging circuit includes a voltage potential-responsive element or component for sensing the charged level of the receiving device coupled to the circuit and enabling or disabling the circuit charging operation, together with a variable-conductance circuit component for producing a generally constant charging voltage output to the receiving device over a wide range of applied voltages but also operable to provide a first amount of current flow to the receiving device at a given applied voltage and temperature but a second a limited amount of current flow when the voltage across the charging circuit is sufficiently large. In its most preferred embodiment, the voltage responsive component may be a diode switch, and the variable-conductance circuit component may be a positive temperature coefficient (PTC) thermistor.
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Albright Marcia S.
Eccleston Larry
Morse Dennis M.
Smith Bruce E.
Tekonsha Engineering Company
Tibbits Pia
Wong Peter S.
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