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The purpose of the battery management system is to improve the efficiency and prolong cycling life of the battery pack which is connected in series, SH79F329 is used as the main control IC of the hardware. The system can detect the voltage, current, temperature of the battery by AD sampling, and can calculate the SOC by the value of current and the way of SOC algorithm,as well as communicating with the host computer. and it has been implemented in the process of charging equalization, overcharge protection, overdischarge protection and a series of other processes. It proves that this design has high reliability and real-time performance in the test.

The heat dissipation design is very important for controller chip. But the traditional methods can not get the best results. This paper introduces the basic theory about the heat dissipation design and puts forward an optimized method of the heat sink design. This paper uses the thermodynamic principle and matlab simulation to determine the geometrical size of heat sink which can make the controller chip work on the 50°C environmental temperature and the inner temperature of chip under 150°C. Using this method we can design the heat sink quickly and efficiently, and realize a balance between the performance and cost.

Wireless Sensor Network (WSN) is used for such tasks as surveillance, widespread environmental sampling, security, and health monitoring widely. In this paper, a WSNs topology is proposed for lightning monitoring of distribution lines, which decides the number of nodes, routing protocol and power efficiency. The WSNs is deployed along the distribution line with nodes mounted on tall towers, which is used to monitor the lightning activities and accomplish fault diagnosis. At last, a monitoring system based on WSN is fabricated.