Passive isolation accumulator voltage monitoring circuit

Abstract

The invention relates to a passive shield storage voltage monitoring circuit in the field of detecting technology. It comprises a reference voltage generating circuit, a digital optically coupled shield analog quantity input circuit and a general digital control circuit, wherein the digital optically coupled shield analog quantity input circuit comprises a digital optically coupled shield circuit, a current-voltage changing circuit, a multiply path analog quantity choosing circuit and a signal adjusting circuit; the output end of the digital optically coupled shield circuit is connected with the input end of the current-voltage changing circuit; the output end of the current-voltage changing circuit is connected with the input end of the multiply path analog quantity choosing circuit; the output end of the reference voltage generating circuit is connected with the one input end of the digital optically coupled shield analog quantity input circuit; the output end of the reference voltage generating circuit is connected with the input end of the digital control circuit.

Description

technical field [0001] The invention relates to a circuit in the technical field of detection, in particular to a passive isolated storage battery voltage monitoring circuit. Background technique [0002] Batteries are widely used in industry, transportation, and communication industries. In use, battery cells are generally connected in series and parallel to form a battery pack to increase output voltage and expand output capacity. Monitoring the voltage of a battery cell is to understand the battery cell and battery pack. important means of status. Since the terminal voltage of a battery cell does not vary greatly from full charge to discharge termination, the millivolt level changes of its floating charge voltage and discharge termination voltage may have a serious impact on the performance of the battery. The measurement accuracy of the body battery voltage is relatively high and must reach the millivolt level. At present, the battery cell voltage monitoring circuit ma...

AI Technical Summary

Problems solved by technology

The disadvantage of this circuit is that due to the slow execution speed of the relay, which affects the inspection speed, there is an obvious sound of the relay action during the working process; and the electrical life of the relay is generally 10 times, calculated as one action in 2 seconds, the time life of the relay is only 2 years, affecting the service life of the entire monitoring device

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