Design and Optimization of Voltage Acquisition System Based on GMD1002
The battery management chip monitors the health of battery by collecting battery voltage.It is a-ble to provide battery protection and voltage equalization optimization.The accuracy of voltage acquisition is one of the main performance parameters of the battery management chip.Based on the self-developed vehicle-gauge battery management chip GMD1002,a battery voltage acquisition system with STM32 as the main control chip is designed.The digital filter is designed to match the voltage acquisition characteris-tics of the GMD1002 chip.High precision voltage source and battery simulator are used to test the per-formance of fixed voltage acquisition,ramp voltage acquisition and battery voltage equalization control of the system.The results show that the digital filter can effectively reduce the influence of transientpulses,the fixed voltage reading error is within 1 mV;and the ramp voltage reading error is within 2 mV in the range of 0～3.2768 V.T he battery equalization control function inside the chip is normal,and the system has a good battery management function.
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维普
