Tags: Affect the internal resistance of 12V maintenance-free lead-acid battery
In addition to the physical connection resistance, the ionic conductivity of the electrolyte, and the internal resistance generated during the electrochemical process that occurs on the surface of the plate, 12V The maintenance-free lead-acid battery has 6 cells inside, and the voltage of each cell is 2 volts. The connection between the cells will also affect the internal resistance of the battery. So how do we know the battery used and its internal resistance? Below I introduce three detection methods: 1. Conductivity. The method is to test the change value of the current flowing through the battery by applying a voltage of known frequency and amplitude to a certain battery. The conductance is the ratio of the AC component and the voltage amplitude in the same phase. 2. Impedance measurement can be done by applying a current signal of known frequency and amplitude to the battery, and then measuring the AC voltage drop generated on a single cell or a whole group of batteries. The AC voltage is measured by the positive and negative terminals of a single battery or the smallest cell. Then use Ohm's law to calculate the resulting impedance. The calculation is done automatically by the meter. 3. Resistance measurement is to apply a load to the lead-acid battery, and then measure the voltage and current flowing through the various stages of the battery. Divide the rate of change of voltage by the rate of change of current to get an ohm.
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