How to make a Li-ion battery tester for high-current applications?
The demand for lithium-ion (Li-ion) batteries is growing at an exponential pace, fueled by the increasing popularity of electric vehicles, personal electronics and grid systems. As consumer demand grows, so does the need for highly accurate battery-formation testing capabilities.
Battery formation and testing is an important manufacturing step to maximize battery life and storage capacity requiring multiple charge and discharge cycles. During these cycles, battery current and voltage must be precisely controlled.
Battery Tester Reference Design for High Current Applications
The TIDA01040 reference design provides an easy-to-design solution utilizing high accuracy constant current (CC) and constant voltage (CV) calibration loops to achieve up to 0.01% full scale charge and discharge current control accuracy. This solution supports charge and discharge rates of up to 50 A and provides a high-precision DAC and ADC to regulate and monitor the battery voltage and current. Furthermore, the flexible solution provides an option for additional higher current and multi-phase applications.
All key design theories are described guiding users through the part selection process and optimization. Finally, schematic, board layout, hardware testing, and results are also presented.