| With the social development and scientific and technological progress, people are paying more and more attention on green energy and environmental protection, supercapacitors as a new type of energy storage devices has aroused extensive attention. Supercapacitors have high power density, long cycle life, wide operating temperature range, suitable for high-current rapid charging and discharging, environment-friendly, no memory effect etc., which is the traditional secondary battery irreplaceable advantages. The paper for Automatic Guided Vehicle which is the production of the Kunming ship equipment group Co., LTD in the use of traditional secondary battery to the existence of power density is low, not suitable for high-rate high-current charging, life is short, relatively expensive, requiring regular maintenance, pollution of the environment of the shortcomings to improvement. The paper combines the characteristics of AGV and studied the supercapacitor and battery hybrid energy storage characteristics; and discussed the AGV charging station layout under the condition of the power capacity is low and charging rate is higher, and gives the charge control strategy.Papers on the basic characteristics of supercapacitor experimental research and analysis, and for the supercapacitor capacity, equivalent series resistance, leakage current, equivalent parallel resistance, self-discharges and other parameters are given a variety of simple and easy method. Introduced the theoretical basis of supercapacitors; a detailed analysis of the supercapacitor energy storage capacity of deviation ratio on the impact of the module capacity, and designed a simple voltage equalization circuit.The equivalent model of directly paralleled Supercapacitor/Battery hybrid energy storage and the model that based on the Buck-Boost power converter of the theoretical analysis respectively in this paper, the hybrid storage model was setup, the main parameters of supercapacitor module and battery module to the impact of hybrid storage energy systems was analyzed. Respectively, directly paralleled Supercapacitor/Battery hybrid energy storage and based on the paralleled Buck-Boost power converter with the pulse discharging was simulation analyzed and experimental studied; This paper also specifically carries experimental analysis on supercapacitor and lithium iron phosphate batteries direct parallel hybrid. To clarify the hybrid power under the pulse loads, the supercapacitor played a power buffer role which reduced the damage when the pulse load put on the battery. Based on the Buck-Boost power converter hybrid energy storage model, the supercapacitor as the main power usage, while the battery is only as an auxiliary power supply, so battery is always in floating state, is also equivalent to standby power. Simulation experiments carried on the pure supercapacitors and hybrid energy storage through the power converter power supply in the AGV, completed the parameters of the supercapacitor module design calculations and a comprehensive evaluation carried out on the experimental results, give the application value of supercapacitor in AGV.Exploration and study of the AGV that used supercapacitor as main power layout method of charging stations, described charging stations of centralized and decentralized layout of the advantages and disadvantages, highlighting the importance and necessity of decentralized arrangement. Discussed the charging station decentralized layout principles to be followed, and charging control strategies was designed to comply with AGV that used supercapacitor as main power. Finally, the article is based on eM-Plant software and in accordance with the requirements of charging control strategies setup a simulation model, and give the simulation analysis. Using the decentralized arrangement of charging stations to solve the capacity shortage of supercapacitor, reducing the energy consumption when AGV in the charge en route, there is a high application value in develop supercapacitor with high-rate charging current. |
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