利用数字化手持技术探究原电池电流和温度的变化

Using Digital Hand-held Technology to Explore Current and Temperature Changes of Copper-zinc Primary Battery

对学生原电池学习的认知难点——铜锌原电池为何能产生电流进行了深入分析。利用数字化手持技术定量测定单液和双液铜锌原电池的反应电流、溶液的温度变化曲线,进而比较2种电池的效率,从宏观、微观、符号、曲线表征4个方面深入分析,得出结论：与单液铜锌原电池相比,双液铜锌原电池的电流稳定性较好,能量转化效率较高,因此电池效率也更高。手持技术实验结合＂四重表征＂模式进行教学,以期为原电池的探究式教学提供案例参考和教学建议。

This paper analyzed the cause of current in copper-zinc original battery, using dig- ital handheld technology to quantitativly determine the reaction current and solution＇s tempera- ture curve of single fluid and two liquid copper-zinc primary batteries, and then compared efficien- cy of the two kinds of batteries. This study analyzed deeply from 4 aspects： macroscopic, micro- scopic, symbol and curve representation, the conclusion was that two liquid copper zinc primary battery had better current stability, higher energy conversion efficiency, so it was more efficient. Handheld technology experiment combined with ＂tetra-representation＂ mode of teaching, provid- ed case reference and teaching suggestions for inquiry teaching of primary battery.