Research Of Integrated Battery Pulse Charging Controller

In market,the battery pack consists of several series-connected battery cells with the same characteristics.Therefore,the battery charger can only control the whole battery package,but cannot protect the inner battery cells from overcharging which decreases the service time of batteries.In the background of the current development of the energy storage industry,especially the lead-acid battery industry,by reviewing the past scientific research achievements in energy storage management,the future development of scientific research is put forward,and an optimal charge/discharge controller of the minimum cell is proposed.By using the 6-way flyback topology based on the synchronous rectifier,this design can simultaneously apply the charge/discharge control on each of the 6 single battery cells which has the minimum unit voltage of 2V to satisfy the battery maintenance requirements.The charge/discharge controller power supply,control circuit and the main circuit are integrated in one PCB board,the size of the board is matched with the size of the battery fit,the two can be packaged together to achieve the controller and battery integration.This paper introduces lead-acid battery and its charging technology in the new era of development and the expected trend,thoroughly discusses the battery pulse charging principle and its various methods,and extracts a new improved charging method from the existing methods.The design of this new variable pulse width pulse charging method is analyzed and discussed,the superiority of this method is theoretically explained.On the basis of the theory of charging method used in the complete analysis,the topology of multiple output flyback circuit which can realize this method is put forward,and the operating principle of the topology is analyzed and explained in details,including the working principle of 2-way flyback circuit,the principle of the active clamp soft switch,and then the design of the flyback transformer is carried out.Finally,the design of the specific device and control parameters is carried out according to the operating principle of the active clamp soft switch.After designing the hardware circuit,this paper continues to study the software control system of charge and discharge and battery equalization of the pulse charger.The method and analysis of circuit operation control are carried out for the design of variable pulse width positive and negative pulse charging method.Then,the parameters of the circuit topology are deduced,and its small signal AC equivalent circuit is obtained for PID tuning.Finally,the feasibility of charging and discharging is verified by simulation.The simulation results shows that the proposed method can effectively solve the problem of resonant spikes in the switching circuit of the active clamp,which provides a reference for the actual hardware system design.In the case of completing theoretical analysis and complete hardware and software design,this paper built an integrated pulse charging experiment platform and carries on the experiment.Through the demonstration and analysis of the experimental results,the feasibility and practicability of the integrated charger are verified.