초록 ▼

A device for determining the charge condition of a secondary electric storage battery, and including a digital integrator comprising a pulse generator for producing pulses at a frequency proportional to the magnitude of the instantaneous battery current, and an up-down counter for counting the pulse

A device for determining the charge condition of a secondary electric storage battery, and including a digital integrator comprising a pulse generator for producing pulses at a frequency proportional to the magnitude of the instantaneous battery current, and an up-down counter for counting the pulses in a sense (i.e. up or down) dependent upon the battery current direction. A switching arrangement operates to couple selectively the pulse generator or an adjustment pulse generator to the counter, and a comparator controls the supply of pulses to, and the sense of counting in the counter, when the adjustment pulse generator is coupled thereto in accordance with the result of a comparison of the counter setting and of a function signal. A function generator, programmable in accord with the relationship between temperature, no-load voltage, and charge condition of the battery concerned, is controllable in accord with the instantaneous temperature and no load voltage of the battery so as to generate the function signal to represent the associated charge condition.

대표청구항 ▼

In a device for determining the charge condition of a secondary electric storage battery and including an integrator comprising a pulse generator for producing pulses at a frequency which can be varied in accordance with the magnitude of a load current driven by the battery, and an up-down counter f

In a device for determining the charge condition of a secondary electric storage battery and including an integrator comprising a pulse generator for producing pulses at a frequency which can be varied in accordance with the magnitude of a load current driven by the battery, and an up-down counter for counting the pulses from the pulse generator in a sense dependent upon the battery current direction, the improvement comprising an adjusting pulse generator, switch means for selectively coupling said first-mentioned pulse generator or said adjusting pulse generator to the up-down counter, a function generator programmable in accordance with the relationship between no-load voltage, temperature and charge condition of the battery concerned to generate a signal representing the charge condition associated with a particular detected no-load voltage and temperature, and a comparator connected to receive and to compare the said signal from the function generator, and a signal representing the counter setting, and to control the supply of pulses to the up-down counter and the sense of counting therein, when the adjustment pulse generator is coupled thereto, in accord with the result of the comparison.