Battery voltage simulation circuit, battery voltage simulation system and power battery training apparatus including same

A battery voltage simulation circuit, comprising:

• an isolation connection unit, a control unit, and a conversion output unit;
• wherein an input end of the isolation connection unit is configured to be electrically connected to an external input device, an output end of the isolation connection unit is electrically connected to an input end of the control unit, an output end of the control unit is electrically connected to an input end of the conversion output unit, and an output end of the conversion output unit is configured to be electrically connected to a simulated battery cell;
• the isolation connection unit is configured to electrically isolate the control unit from the external input device, receive a required voltage signal transmitted by the external input device, and transmit the required voltage signal to the control unit;
• the control unit is configured to respond to the required voltage signal by outputting a pulse modulation signal with a target duty cycle to the conversion output unit, wherein pulse modulation signals corresponding to different required voltage signals have different duty cycles;
• and
• the conversion output unit is configured to convert the pulse modulation signal with the target duty cycle into a corresponding voltage simulation signal, enabling the simulated battery cell to simulate the output of the required voltage.