The microchannel heat sink is an effective technology for the thermal management of Li-ion batteries. The overall performance of two heat sinks with improved thermal management of Li-ion batteries was determined by a numerical simulation model. A manifold microchannel heat sink (MMC) and a traditional microchannel heat sink (TMC) with different aspect ratios of microchannels were developed. Thermal transfer performance and pressure drop characteristics of two heat sinks were compared by Fluent. Results indicate that the temperature uniformity of the TMC is worse than that of the MMC. The total pressure drop of TMC is significantly higher as compared to that of the MMC. Consequently, the MMC has a better overall performance than the TMC.
The solar street lamp monitoring system was designed based on ZigBee wireless communication technology in this paper. The design constructed communication network based on ZigBee wireless communication technology, which was included database, B/S architecture combined with geographic information system and solar intelligent control terminal for field controller. The design can be in a wide range of storage battery on-line monitoring, street lamp remote monitoring, single street lamp controlling, data acquisition centralizing, storage battery charging and discharging circuit controlling intelligence, drive control rationalization, and street lamp control humanization. A resistor divider module Microprocessor Voltage sampling module of solar battery Clock module Voltage sampling module of storage battery Current sampling module of storage battery Power and reset module Output drive module ZigBee odule Temperature sampling module
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