COMPUTER MODELING OF A CHARGE CONTROL SYSTEM FOR A LEAD-ACID BATTERY IN A PASSENGER CAR

As part of improving the power supply system of a passenger car, this article analyzes algorithms for two-stage temperature-dependent CC–CV (constant current–constant voltage) charging of a lead–acid battery, and selects a charge control system structure. In the MATLAB/Simulink environment, a computer model of a 56PzV-385 battery is developed, incorporating the considered charge control system for temperature voltage compensation while maintaining CC-CV charging. The system is simulated under varying charging temperatures, followed by a transition to discharge mode. The obtained results demonstrate correct operation of the control algorithms, an adequate system response to temperature changes inside the battery box, and a proper transition between constant-voltage and constant-current modes.