Design Of An Energy-Saving Charging And Discharging System For Formation Process Of Power Batteries

Formation is a key process in the production of power battery. In theprocess, each battery needs three charges and two discharges. However, mostof the current domestic battery formation equipment is discharged in highcurrent on resistance, which leads to great waste of energy due to technicaland cost factors. Therefore, reducing waste and reusing of discharge energy isone of the most urgent problems for battery manufactories.By studying the characteristics of formation of power battery, link theseparate originally processes, charge and discharge together, design an energysaving charge and discharge system based on formatting each other, reducethe heat loss of resistor discharging. The work of this paper includes theaspects as follows:First, analyze task requirements, design the overall program based onsymmetric pairs of charging and discharging system，divide the system intoBOOST charge and discharge module, voltage and current monitoring module,upper computer data processing and human-computer interaction module andseries-parallel state switching of battery pack module.Then, design hardware circuit of charge and discharge system, accordingto the overall concept design, further subdivide each module, calculate theparameters in details and select components for each function circuit. Next, based on MPLAB X development environment, design the controlprogram of charge and discharge system on lower computer. Develop controlprogram on upper computer based on ARM, design the sampling dataprocessing algorithm and human-computer interaction.And in the end, combine with the production characteristics of formation,and based on design method of mechatronic, design an industrial controlplatform, which is good for production operations. Conduct replicationexperiment is conducted, and calculate the efficiency of the system accordingto the above design. Propose some improving measures specific to thephenomena and problems in the experiment.The result of charge-discharge experiment and efficiency calculation oflead acid batteries indicates that this system can meet prospective designrequirements, and be capable for the completion of formatting powerlead-acid batteries.