退役EDV动力电池二次利用的平衡控制策略
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摘要
为解决退役EDV动力电池在电网储能系统中二次利用的平衡控制问题,提出了新的平衡系统结构及控制策略。给各电池模块分别接入可控旁路开关,通过控制其占空比来控制各模块的平均充放电电流,从而实现系统充放电电流的合理分配,使各电池模块SOC保持一致。此方法在实际电池模型的模拟中,均表现出良好的控制特性,很好地解决了退役电池模块间性能差异较大的问题,为其在电网储能系统中实现二次利用提供一种新的方法,对智能电网发展和新能源开发有重要的意义。
In order to solve the balance control problem of reuse of the EDV power batteries in the grid energy storage system, a new balance system structure and control strategy were proposed. Each battery module was connected with controllable bypass switch, by controlling the charge and discharge current accounting for the average duty cycle control of each module, the reasonable distribution system of the charge and discharge current could be realized,making the battery modules' SOC keep the same. This strategy shows good control characteristics in actual battery model simulation, and is a good solution to the retired battery modules with relatively large different properties. It provides a new method for achieving reuse in the grid energy storage system with important significance for the development of smart grid and new energy exploitation.
In order to solve the balance control problem of reuse of the EDV power batteries in the grid energy storage system, a new balance system structure and control strategy were proposed. Each battery module was connected with controllable bypass switch, by controlling the charge and discharge current accounting for the average duty cycle control of each module, the reasonable distribution system of the charge and discharge current could be realized,making the battery modules' SOC keep the same. This strategy shows good control characteristics in actual battery model simulation, and is a good solution to the retired battery modules with relatively large different properties. It provides a new method for achieving reuse in the grid energy storage system with important significance for the development of smart grid and new energy exploitation.
引文
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[4] CHEN L R. Design of duty-varied voltage pulse charger for im-proving li-ion battery-charging response[J]. IEEE Transaction on In-dustrial Electronic,2009,56(2):480-487.
[5]高明煜,何志伟,徐杰.基于采样点卡尔曼滤波的动力电池SOC估计[J].电工技术学报,2011,26(11):161-167.
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