Nickel-cadmium battery monitor

Details Nickel-cadmium battery monitor Nickel-cadmium battery monitor

1974-06-18

1976-02-24

Miller, J. D.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

340249, 324 295, H02J 700, G01M 2702

Patent

active

039406792

ABSTRACT:
The nickel-cadmium battery monitor is provided with sensors for measuring the battery temperature, the battery voltage and the magnitude of the current being charged to the battery, each of the sensors generating a sensor signal voltage that varies directly with the magnitude of the parameter being measured. The sensor signal voltages from the temperature sensor and the voltage sensor are conditioned and then converted to an analog signal voltage increment the magnitude of which corresponds approximately to the actual magnitude of the battery temperature and battery voltage as measured. The analog signal voltage increments thus obtained cause an analog visual display means to indicate visually the approximate magnitude of the battery temperature and battery voltage as measured. The conditioned analog signal voltages from the temperature sensor and the voltage sensor are also converted to a multibit digital signal which causes a digital visual display means to display in numeric form the actual magnitude of the battery temperature or battery voltage as measured. Charge rate sampling means continuously measures the magnitude of successive samples of the charge current and transmits an alarm signal to a flash alarm means when the rate of increase in the charge current exceeds a predetermined value. The flash alarm means transmits flash alarm signal to the digital visual display means when the temperature of the battery exceeds a predetermined value or when the voltage of the battery falls below or exceeds a predetermined value or when the charge rate sampling means transmits an alarm signal to the flash alarm means.

REFERENCES:
patent: 2509485 (1950-05-01), Dalzell
patent: 2835862 (1958-05-01), McNutt
patent: 3525075 (1970-08-01), Frome et al.
patent: 3541537 (1970-11-01), Kasson
patent: 3593099 (1971-07-01), Scholl
patent: 3626398 (1971-12-01), Owens et al.
patent: 3641530 (1972-02-01), Schoenwitz
patent: 3665399 (1972-05-01), Zehr et al.
patent: 3665439 (1972-05-01), Brummer et al.
patent: 3750465 (1973-08-01), Howell et al.
patent: 3786343 (1974-01-01), Ehlers

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