Study on a Complex Waveform Charging System Applied to LiFePO4 Battery for Electric Vehicles

• Main Authors: Jia-Yu Lin, 林家宇
• Other Authors: 黃國修
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/6qhxuw

碩士 === 國立臺北科技大學 === 車輛工程系所 === 105 === Taiwan is difficult to compete with the international manufacturers in the non-IT lithium battery market and competitiveness, only we can do is to make low price competition. In this paper, our lab make research on lithium-ion phosphate battery, which is most widely used on electric vehicle. In order to improve the current lithium-ion battery life and significantly reducing the cost of battery replacement, we are devoted to the development of a complex waveform charging system, and supplemented by AC impedance spectrum experiment with equivalent circuit model for analysis. 　　The complex waveform charging system is a smooth and adjustable charging strategy. Using bidirectional power supply, so that we make battery can sometimes charge, sometimes discharge, and make a better charging effect. The use of AC impedance analysis can be the battery in response to the relationship between the resistance value and the corresponding frequency, observe and sort out the battery, sort out to determine the activation or difficult to rescue the need to recover the battery. In the experiment, it is not only to activate the regenerative battery simply, but also to use the high current over discharge or the high current charging at low temperature to carry on the battery destruction and then use the complex waveform charging strategy, repeated experiments to verify the feasibility of this compound wave charging method.