预放电模式对锂锰电池性能的影响

Effects of pre-discharge mode on the performance of Li-MnO_2 battery

预放电模式对锂二氧化锰(Li-MnO_2)一次电池存储后的内阻、电压及放电性能有直接影响。研究恒流、恒阻和直接短路等3种模式预放电对Li-MnO_2电池性能的影响。在60℃存储后,恒流、恒阻和直接短路预放电的Li-MnO_2电池,平均内阻分别为569mΩ、852mΩ和1140mΩ,平均开路电压分别为3.257V、3.250V和3.271V。恒流预放电制备的电池,内阻、电压分布一致性更高,1000mA恒流放电时,恒流预放电电池的容量比直接短路预放电的高28.4%。

Pre-discharge modes had a direct effect on internal resistances, open circuit voltage（OCV） and discharge performance. The effects of galvanostatic, constant resistance and short circuit pre-discharge on internal resistance, OCV and discharge per- formance of Li-MnO2 primary battery were investigated. For the Li-MnO2 primary battery of galvanostatic,constant resistance and short circuit pre-discharge, the average internal resistances were 569 mΩ, 852 mΩ and 1140 mΩ, respectively, the OCV was 3. 257 V, 3. 250 V and 3.271 V, respectively, after storage at 60 ℃. The coherence of internal resistance and OCV distribution of the battery, which was prepared by galvanostatic pre-discharge, was higher than other pre-discharge modes. The discharge capacity of battery prepared by galvanostatic pre-discharged was 28.4 % higher than that of by short circuit at 1 000 mA discharge.