| 摘要 |
PURPOSE:To judge the life of a cell by measuring pH while holding the temperature of electrolytic solution to approximately constant, and judging the charge and discharge depth of the cell from the pH value. CONSTITUTION:A glass electrode is arranged within an electrolytic solution storing jar of a negative electrode side, and the temperature of electrolytic solution during charging and discharging is made approximately constant, the solution movement through a diaphragm is interrupted by equalizing respective pressures which act on the diaphragm between the electrolytic solution of the negative electrode side and the electrolytic solution of the positive electrode side during charging and discharging. And NH4Cl of 2-4mol/l as supporting electrolyte is added into the negative electrode electrolytic solution, and the pH value of the negative electrode electrolytic solution is measured through the charging and discharging of the cell. The pH value of the negative electrode electrolytic solution is linearly raised during charging, and is linearly reduced rapidly during discharging, and thus the change of pH corresponds to the charging and discharging state. |
