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本文系统测定了温度对不饱和硫酸镉标准电池电动势的影响。被测的电池有45个,其中六个是四年的老电池,其余均为一年的新电池。按电动势值的差别,把它们分成九组,对不同电动势值的不饱和电池的CdSO_4浓度进行重量分析。得出电池电动势值随CdSO_4浓度的变稀而近似直线增加的关系。在0—50℃升温过程中,每隔5℃测其电动势值,实验记录采用最小二乘法,求得电动势温度关系式为:E_t=E_(25)+[a(t-25)+b(t-25)~2+0.0072(t-25)~3-0.00005(t-25)~4]×10~(-6)伏式中,a=5.28-5642(E_(25)-1.018000)b=0.051-40.81(E_(25)-1.018000)
This paper systematically measured the temperature of the unsaturated cadmium sulfate standard battery electromotive force. There were 45 batteries under test, of which six were four-year-old batteries and the rest were new batteries for one year. According to the difference of EMF, they are divided into nine groups, and the weight of CdSO_4 in unsaturated battery with different EMF is gravimetrically analyzed. The result shows that the electromotive force value of the battery increases with the concentration of CdSO_4 approximately linearly increasing. The electromotive force values were measured every 5 ° C during the temperature rise from 0 to 50 ° C. The least square method was used to record the experimental results. The relation between the electromotive force temperature and the electromotive force temperature was obtained as E_t = E_ (25) + [a (t-25) + b a = 5.28-5642 (E_ (25) -1.018000) b (t - 25) ~ 2 + 0.0072 (t-25) ~ 3-0.00005 (t-25) ~ 4] × 10 -6 = 0.051-40.81 (E_ (25) -1.018000)