| Summary: | 碩士 === 國立虎尾科技大學 === 電機工程研究所 === 102 === This design of a lithium battery monitoring and management systems, mainly for the four multi-parallel battery strings. The system can manage cell balancing, monitoring voltage, current and temperature, or high voltage battery overcharge and over-discharge or build low-voltage protection, to estimate the residual capacity of the battery pack, isolated communication (RS485), LCD display. In paper, the battery voltage is output via the analog front-end and more a public service to the MCU, and then by the MCU on the battery pack to balance the protection circuit is from the overcharge protection, over-discharge protection, pre-charge protection composition, when the MCU determines the load in overcharge, over discharge current and voltage in a timely manner to protect the battery, the battery residual capacity estimation rule is to use the piecewise linear interpolation method to assess the current capacity of the battery, isolated RS485 communication to make connections, you can detect the communication effect two boards, the temperature sensor is is to detect the temperature of the battery management system, and finally to customized LCD display battery voltage, temperature, residual power.
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