Battery voltage acquisition system based on programmable switch array

With the development of new energy vehicle technology, the technology of electric vehicle power battery pack management has made great progress. In the battery management system (BMS), the ability to obtain the voltage information of each cell in the battery pack in a timely and accurate manner is the most basic requirement for the stable operation of the system. This paper designs a battery voltage acquisition system based on programmable switch array. The system includes over-current protection circuit, selection switch array, voltage conditioning circuit and MCU control circuit. The system can be used in many popular fields such as electric vehicles, energy storage power stations, and aerospace. At the same time, it has outstanding advantages such as low circuit cost, strong system scalability, and high voltage acquisition accuracy.