Battery charge monitor

Details Battery charge monitor Battery charge monitor

1992-06-24

1994-08-16

Peckman, Kristine L.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 48, 340636, H02J 700

Patent

active

053390172

ABSTRACT:
An arrangement for detecting the state of charge of a vehicle battery (B201) in an electrical system (Z201) of a vehicle comprises an array of diodes (BD201) arranged to detect the initial voltage drop across the load when energised by a switch (M201). Each diode in the array defines a predetermined forward voltage drop and the diodes are arranged to energise respective thyristors (S201 to S208) when they conduct. These thyristors energise respective LEDs (201 to 208) which form a bar graph display, whereby the greater the voltage drop across the load (Z201) the greater the number of diodes which conduct and the greater the number of LEDs which are illuminated. Accordingly the bar graph display indicates the state of charge of the battery.

REFERENCES:
patent: 4020414 (1977-04-01), Paredes
patent: 4027231 (1977-05-01), Lohrmann
patent: 4080560 (1978-03-01), Abert
patent: 4743831 (1988-05-01), Young
patent: 4803459 (1989-02-01), Ta
patent: 4947123 (1990-08-01), Minezawa
patent: 5130659 (1992-07-01), Sloan

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