Simulators for Electric Automobile Batteries

The simulator for electric automobile battery is the test facility researched and developed by our company specially faced with relative manufacturing factories of electric automobiles, it has the DC output characteristics including high precision and high dynamic response, and it has the function to feedback energy for the power grid. It adopts all-digital control, which is of high control precision, quick response speed and wide output adjusting range. The battery simulation function can simulate the charging and discharging characters of batteries of all kinds of specifications, and then provides electric energy with battery characteristics for equipment like electrical machinery, battery storage inverter and charging pile, etc. The output has the programmable function, and can be used in many occasions through software setting. It can simulate the output characters of the battery like “constant voltage”, “constant current” and “constant internal resistance” etc. and the charging and discharging of battery, etc. Meanwhile this simulator has the current-limiting protection function for the connected testing equipment. This simulator can be used in the testing occasions like tests for drive motor of the electric automobile (controller), battery storage inverter, bothway battery charger of electric automobile and charging and discharging of high-capacity battery packs, etc.

The basic structure of simulator for electric automobile battery can be divided into 2 parts, the alternating-current rectification and DC transfer, the alternating-current rectification circuit adopts the AFE four-quadrant rectification technical scheme, which sharply reduces the content of harmonics in the input current at the power grid side, then the voltage of public DC bus is controlled strictly according to the given voltage without being affected by the voltage fluctuation at the power grid side and the change in the load of DC/DC transfer side, thus providing steady and constant DC voltage source for the DC/DC transfer, meanwhile the AFE four-quadrant rectification is convenient for the feedback of energy. The DC converting circuit is the bothway DC/DC transfer, it outputs the target voltage value according to the DC/DC transfer of the software setting, and the battery simulator will output relevant DC voltage to simulate batteries with different specifications of voltages, the battery simulator can show a “character of constant voltage”, “character of constant current” and “character of constant internal resistance” externally according to the predicted output external characteristic of the software setting. E.g., when testing the electric machinery with the battery simulator, the battery simulator shows a “character of constant voltage” externally according to the given voltage, then adjusts the output voltage to make the electric machinery work with different rotating speeds, the electric machinery works under an electromotion state when the voltage is raising or stays constant, the electric energy is from the power grid to the electric machinery, and the battery is under the “discharging’ condition, during the dynamic process of voltage reduction, the energy of electric machinery feeds back to the power grid through the DC/DC converter and the AFE, and the battery is under the “charging” condition. When there is fault in the tested electric machinery, the output of battery simulator is automatically converted to the “character of constant current” to protect the tested electric machinery.

Environmental conditions

Main technical specifications

Battery simulator for Zibo Super Moto Co., Ltd. (Shanghai Electrical Apparatus Research Institute (Group) Co., Ltd.)                                                                       1 set

Battery simulator for Taizhou Supervision and Inspection Institute (Shanghai Electrical Apparatus Research Institute (Group) Co., Ltd.)                                  1 set

Battery simulator for Anhui Hualing Automobile Co., Ltd (Shanghai Electrical Apparatus Research Institute (Group) Co., Ltd.)                                               1 set