Design Of Feedback Type Battery Testing Device And Debugging Method

The electric vehicle(EV)industry developed rapidly,with the support of national policy and the purpose of environmental protection.Electric vehicle have advantages over conventional fuel cars in many ways.The core of electric vehicle is tri-electric system.In this system the batteries affect the speed and mileage of electric vehicles,so the manufacturer of electric vehicles is taking battery testing seriously.In traditional testing methods,electric vehicles batteries test use the energy consumption test method which difficult operation,low reliability and waste of energy.This thesis will design a new type of battery testing device which can feed the power of batteries test to the power grid.The significance of the device is to achieve energy-saving emission reduction,reduce the development cost of enterprises.First of all,this thesis discusses the principle of the feedback battery testing technology and the related theoretical basis.On this basis,this thesis has carried on several converter simulation.According to the simulation results,this thesis designed the main circuit of the feedback battery testing device.Secondly,this thesis analyzed the parameters of the circuit in steady state and the intermittent operation mode of the circuit.According to derived formula,this thesis calculated the parameters of Boost circuit and Buck circuit.The simulation results are basically consistent with the calculated results.Considering the practical application,this thesis completed the discrete mode simulation,and the expected simulation results are obtained.And then,this thesis designed the AC side circuit and analyzed the software and hardware of the device in detail.According to the circuit simulation this thesis deeply studied DC-AC module circuit,data sampling,motion control,PID control.Finally,this thesis presents a pair-dragging test method of the feedback type battery testing device.