Design Of Chip - Based Battery Detection System Based On Memory And Look - Up Table Algorithm

As the fast development of portable electronic devices, battery has become more and more important in the power system, and power management has become an important issue for an electronics system. Besides, since the energy crisis is coming, novel automobile research such as e-cars research has become an important issue these days, and e-bike is already all over China. So, Power Management research is quite a meaningful research issue nowadays, and gasgauge is a critical part which could help customer to know the battery status during usage.In this paper, the Acid-Pb battery gasgauge is focused on, and a method based on Look-Up-Table and gasgauge counter is proposed to moniter battery’s status. When the battery is not in usage, LUT is used to get the battery’s status by reading the battery’s open circuit voltage and temperature; when the battery is in usage, gasgauge counter which is controlled by the battery’s output current value is used to get the battery’s status.At the last part, a test chip based on the scheme proposed has been tapeout. The chip is composed of ADC, RRAM and temperature sensor, and the digital part is put out of the chip and on a FPGA. By system level test, the proposed gasgauge method could be proved to work effeciently.