一种大容量动力锂电池的化成系统

A Formation System of Large-capacity Power Li-ion Battery

摘要:

随着新能源技术的发展,对大容量的动力锂电池需求越来越多,尤其在电动汽车领域具有广泛的使用；为此设计了一种适用于大容量锂电池的化成系统,说明了其组成和工作原理；为了提高充放电过程中电流控制的精度,采用了可编程反馈式限压恒流斩波控制电路,同时具有限压保护功能,防止锂电池过充过放；化成系统为上下位机结构,由一台上位机(服务器)和若干台下位机(化成单元)组成,组成工业485总线网络,利用上位机对化成过程进行实时监控和数据记录；经试验测试,该系统具有充放电电流大、控制精度高、可多工步编程等特点,能够满足动力锂电池大规模化成生产的需要。

关键词:动力锂电池;恒流斩波;限压保护;化成系统

Abstract:

With the development of new energy technologies, large-capacity power Li-ion battery is demanded more and more, especially it has been widely used in the field of electric vehicles. It designs a large-capacity Li-ion battery formation system, and illustrates its composition and working principle. It uses a programmable feedback voltage limiting constant current chopper control circuit with having voltage limiting protection function to prevent Li-ion battery over-charge and over-discharge so as to improve current control accuracy of the charge-discharge process; formation system uses upper and lower computer structure with consisting of a stage crew (server) and a number of audience-bit machine (into units) which compose an industrial 485 bus network to use the host computer in the formation process for real-time monitoring and data recording. By testing, the system has some characteristics, such as large charge and discharge current, high control accuracy, multiple-step programming, etc., and it can meet the requirements of the large-scale power Li-ion battery formation production.

Key words:power Li-ion battery; constant current chopper; voltage limiting protection; formation system