Battery simulator capable of accurately simulating steady-state characteristics and transient characteristics of battery

The invention provides a battery simulator capable of accurately simulating steady-state characteristics and transient characteristics of a battery, which comprises a main control module, a battery characteristic simulation module and a sampling module, and is characterized in that the battery characteristic simulation module outputs an adjustable load and comprises a steady-state characteristic simulation branch and at least one transient characteristic simulation branch; the transient characteristic simulation branch is connected to or connected out of the simulation loop through the control of the change-over switch so as to simulate the sudden change of the output voltage of the battery in a transient state; each of the steady-state characteristic simulation branch and the transient characteristic simulation branch comprises a voltage regulating circuit, and the main control module regulates the output voltage of the steady-state characteristic simulation branch and the transient characteristic simulation