Self-testing battery discharge indicator

Details Self-testing battery discharge indicator Self-testing battery discharge indicator

1974-12-24

1976-01-13

Miller, J. D.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

340249, G08B 2100, H02J 700

Patent

active

039327973

ABSTRACT:
The voltage of a battery connected to a load is automatically indicated with respect to two voltage levels. A first indicating means indicates that the battery voltage is greater than a first voltage level, and a second indicating means indicates that the battery voltage is less than the first voltage level but greater than a second voltage level. A third indicating means indicates that the battery voltage is less than both the first and second voltage levels and disables the load connected to the battery.
Means are provided for selectively generating a control signal either in response to the battery voltage or at a decay rate independent of the battery voltage. In a normal operating mode, the control signal is determined by the actual decay rate of the battery voltage whereas, in a self-test mode, the control signal decays at a fixed decay rate independent of the actual battery voltage. The first, second and third indicating means operate in response to the control signal.

REFERENCES:
patent: 3568175 (1971-03-01), Schwehr
patent: 3673588 (1972-06-01), Riff
patent: 3852732 (1974-12-01), Yorksie et al.

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