Overcharge preventive device for automotive batteries

Details Overcharge preventive device for automotive batteries Overcharge preventive device for automotive batteries

1991-01-15

1993-02-02

Ng, Jin F.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340632, 340636, 340438, B60Q 100

Patent

active

051841096

ABSTRACT:
An overcharge preventive device for an automotive battery charging circuit comprises an odorant sensor 6 for detecting the amount of gas generated from the battery 1 during charging (FIG. 3). A detector circuit 7 generates an overcharge detection signal when the amount of gas exceeds a predetermined level. In response thereto, the display or monitor lamp 8 displays the overcharged state, and the interruptor circuit 9 separates the alternator 5 from the battery 1. Alternatively, when the automobile has an audio device such as radio, a voltage detector 19 detects the voltage across the load 4 and outputs a signal when the voltage exceeds a predetermined level, an alarm signal generator 20 generating an audio signal in response to the output signal of the voltage detector 19, such that an alarm sound or voice is produced by a loudspeaker 17 via the amplifier 16 (FIG. 4).

REFERENCES:
patent: 3548286 (1970-12-01), Giacalone et al.
patent: 4565991 (1986-01-01), Lupoli et al.
patent: 4785280 (1988-11-01), Fubini et al.
patent: 4894553 (1990-01-01), Kaneyuki

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