软碳负极材料锂电池充放电特性研究

Study on Charging and Discharge Characteristics of Soft Carbon Anode Lithium Iron Phosphate Battery

为了研究软碳负极材料锂电池充放电特性,验证其作为储能电池的可行性,本文利用电化学工作站对锂电池单体进行了实验测试。实验结果表明,软碳负极材料的锂电池无明显的充放电平台,充电过程中电池的电流接受能力良好,充电效率较高。当电池在大倍率放电时,其放电容量仍能保持在较高范围内。在低温条件下放电率有所下降,但放电率仍能达到80%以上,电池具有良好的低温性能。电池内阻相对较小,可以提高电池的充放电效率,同时电池发热量较少,电池的循环寿命可以得到大幅延长。因此软碳负极材料锂电池具有优越的倍率性能、低温放电性能和循环性能,满足作为储能电池的设计要求,也为后期储能系统的研制提供了支撑。

This article is to study the soft carbon anode material lithium battery charge and discharge character istics and verify its feasibility as a storage battery. In this paper, an electrochemical workstation was used to test lithium batteries. The test results show that the soft carbon anode material lithium battery has no obvious charge and discharge platfotto. The charging current of the battery is good and the charging efficiency is high. The discharge capacity can still be maintained in a high range and in low temperature discharge rate has de clined - but the discharge rate can still reach more than 80 --00 - when the battery at different discharge magnifica tion. The battery has good low temperature performance. The battery internal resistance is relatively small. This can improve the charge and discharge efficiency of the battery. At the same time- the battery calorific val ue is less l the cycle life of the battery can be greatly extended. So the soft carbon anode material lithium batter y fulfilsthe requirements as a storage battery.