Testing charge state of vehicle battery - by connecting briefly to electronic tester during transition between charge and discharge states

摘要

The problem of monitoring the state of charge of a vehicle battery, which is complicated by the continuous fluctuation during use between charging and discharging, is resolved by testing the battery while it is briefly disconnected from the circuit in the transition between both states. When the motor is stationary or ticking over, the battery supplies lights or signalling units and is then discharging. The battery (5) is disconnected briefly from the vehicle's electrical circuit and connected to a resistance (12) during the transition between discharging and charging, i.e. whenever the current flow is zero. The test arrangement (4) for the state of charge is an electronic unit containing an ammeter and switch, which work in conjunction with the resistance.