Battery testers (such as the Hioki 3561, BT3562, BT3563, and BT3554) apply a constant AC current at a measurement frequency of 1 kHz and then calculate the battery’s internal resistance based on the voltage value obtained from an AC voltmeter.
Measure the operating voltage of the battery pack V b. Measure the voltage (V 1) between the negative pole of the tested-device and the ground connection. Measure the voltage (V 2) between the positive pole of the tested-device and the ground connection.
According to IEC61960, t he DC resistance can be measured as follows: A DC current step is applied to measure the change in the cell’s voltage. Battery resistance is defined as the change in voltage over the change in current when a discharge current of 0.2C is applied for 10s followed by a discharge current of 1C for 1s.
Measure the Unloaded Voltage: Measure the voltage of the battery when it is not connected to any load. Note this voltage as V1. Measure the Load's Resistance: Switch the multimeter to resistance and measure the resistance of the load that you are going to use to test the battery. Note this value as R1.
Although the instruments can also be used to measure internal resistance and battery voltage for other rechargeable batteries such as nickel-metal-hydride, lead acid, and nickel-cadmium batteries, you should choose a battery tester on the basis of the battery voltage (OCV). See product lineup of Hioki resistance meters & battery testers.
Battery module and pack testing involves very little testing of the internal chemical reactions of the individual cells. Module and pack tests typically evaluate the overall battery performance, safety, battery management systems (BMS), cooling systems, and internal heating characteristics.
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