单体锂电池并联光伏路灯高增益升压电路

High step-up boost circuit of single lithium battery parallel photovoltaic street lamp

光伏路灯电源系统一般采用单体电池串联加DC/DC变换器电路,但单体电池的一致性难以保证,且常规均衡电路均衡能力有限。为解决单体电池不均衡的问题,提出将单体电池串联方式改为并联方式,通过高增益变换器升压来满足负载电压需求。分析了钳位模式耦合电感Boost型与基于耦合电感和开关电容的Boost型高增益变换器的工作原理与特性,并进行对比研究,研制了实验样机,实验结果验证了理论分析的正确性。

The photovoltaic street lamp power supply system generally uses the single battery in series plus DC/DC converter circuit,but the consistency of the single battery is difficult to guarantee,and the equalization ability of the conventional equalization circuit is limited.In order to solve the problem of unbalanced single cell,the series mode of single cell was changed to parallel mode,the high gain converter was used to boost the load voltage.The working principle and characteristics of the clamp mode coupled inductor boost converter and the boost high gain converter based on the coupled inductor and switched capacitor were analyzed.A comparative study was making,a prototype converter was developed,and the correctness of the theoretical analysis was verified by the experimental results.