Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1992-06-08
1994-04-05
Peckman, Kristine L.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
320 23, H02J 700
Patent
active
053008758
ABSTRACT:
A concept of passively recharging the battery of battery backed electronic circuits and in particular utilizing these methods to recharge an RFID transponder's secondary cell(s). The invention particularly relates to battery backed transponders which contain rechargeable batteries wherein the recharging circuitry of the present invention allows for passive (non-contact) recharging of a battery residing in a transponder unit that may or may not be directly accessible for handling. The passive recharging strategies disclosed include utilizing energy sources such as: 1) a radio frequency (rf) signal generated outside the package; 2) a seismic geophone; 3) seismic piezoelectric accelerometers; 4) photovoltaic cells located outside of the transponder package; 5) infrared p-v cells located inside of the package driven by the heated package; and/or 5) acoustic energy (sonic and ultrasonic) coupled to the recharging circuitry via an acoustic transducer.
REFERENCES:
patent: 4684870 (1987-08-01), George et al.
patent: 4992720 (1991-02-01), Hata
patent: 5130634 (1992-07-01), Kasai
Micro)n Technology, Inc.
Paul David J.
Peckman Kristine L.
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