电池化成用的能量回馈型直流变换器

摘要

电池在首次使用前需要进行多次充放电.电池化成的效果将极大影响电池的使用性能.目前市面上主流的化成装置主要采用电阻耗散的方式放电,能源利用率低.针对这一问题,为有效回收放电能量,实现循环利用,同时尽可能提高能源转换效率,设计了基于双向直流变换器的电池化成装置.该装置可以实现对电池能量的高效回收,彻底改变放电能量的丢失问题.采用开关电源的方案实施,将进一步提升能源的转换效率.该装置采用STM32F334作为控制器,以双向Buck/Boost为主电路的拓扑结构,采取模糊PI结构对环路进行补偿,实现对充放电过程中电压和电流的高精度控制,控制精度高达0.05%(FS).通过与传统的化成装置进行测试比较,结果表明,能量回馈型的电池化成装置的节能率高达70%.该装置将逐渐成为市场的主流.%Prior to the first use of battery,repeated charging and discharging are needed.The effect of battery formation may greatly affect the applicative performance of battery.At present,the resistance dissipation mode is mainly adopted in major commercial available formation devices for discharging,so the energy utilization is low.Aiming at this problem,the discharging energy needs to be recovered to achieve recycling use and to improve the efficiency of energy conversion.With the battery formation device based on bi-directional DC converter,high efficient battery energy recovery can be realized and the problem of discharging energy loss can be completely avoided.The switching power supply scheme may further improve the efficiency of energy conversion.In the system,STM32F334 is adopted as the controller,the bidirectional Buck/Boost is used as the main circuit topological structure,and the fuzzy PI structure is selected to compensate the loop,thus the high precision control of the voltage and current during the charging and discharging process is realized,the control precision is up to 0.05% (FS).Comparing with the traditional formation devices,the results indicate that the energy saving rate of the energy feedback type battery formation device is up to 70%,such device will gradually become the mainstream in the market.