Charger system for battery starting current test

A charger system for testing battery starting current, comprising:

• a battery equivalent circuit, comprising a battery internal resistance R0 and an electromotive force E connected in series, and two ends of the battery equivalent circuit are connected to a first signal (signal +) and a second signal (signal −) respectively;
• a signal drive circuit, comprising a first DC output signal and a second DC output signal, and a first load circuit and a second load circuit being configured between the first DC output signal and the second DC output signal, each of the load circuits is connected to the battery equivalent circuit and controlled by a first drive signal (drive signal 1) and a second drive signal (drive signal 2) respectively;
• and
• an intermediate resistor R28, configured between the signal drive circuit and the battery equivalent circuit;
• wherein the first DC output signal and the first signal (signal +) are connected to a positive electrode of the battery, and the second DC output signal and the second signal (signal −) are connected to a negative electrode of the battery.