基于单片机控制的锂电池组电路的设计

Lithium battery circuit design based on MCU

提出一种基于单片机控制的锂电池组电路设计方案.采用8位CMOS闪存单片机PIC16F886作为主控芯片,电路设计中含有S-8254芯片的一次保护电路、S-8244芯片的二次保护电路和MCU的辅助保护功能电路,辅以电池均衡控制电路,实现对整个电池组电路的状态监控和保护功能.对所设计的锂电池组电路进行测试实验,结果表明该设计不仅能精确测量电池组电量,有效保护其电路,而且可使电池进行均衡充电,使各个电池都发挥出最优的性能,从而满足笔记本电脑电源的要求.

A new approach to design lithium battery circuit based on MCU was proposed. The method used8-bit CMOS Flash MCU PIC16F886 as the master chip. In order to monitor the status of the circuit and protect the batteries, the circuit design should first contain a protection circuit with S-8254 chip, second a protection circuit with S-8244, third an MCU auxiliary protection circuit and fourth a battery equilibrium control circuit.The experiments were made based on the circuit design of lithium batteries. The results of the experiments show that the design not only accurately measured the battery pack, effectively protected the battery circuit,but also enabled a balanced charge of the battery, so that all batteries could give the best performance in order to satisfy the laptop back-up power requirement.