| 摘要 |
PROBLEM TO BE SOLVED: To provide the characteristic operation device which can compute the internal resistance and release voltage of a non-aqueous system secondary cell now in use even when there exists no change in current. SOLUTION: Terminal voltage V, the time differentiated value of V, current I, the time differentiated value of I, and the integrated value (q) of current, are inputted, the initial values ofη, and internal resistance R are set up when the relation of the quantity of discharge Q at the initial stage and the value (q) is represented as (q)=ηQ, release voltage E(q) as a function of (q) is obtained out of a first map by using the aforesaidηand R, its differentiated value E(q)/dq is obtained out of a second map, and R is computed by letting a fitting operation be performed so as to allow the sum S of the squares ofδ1 , andδ2 . to be less than a judgement convergent value in such a way that the values of E(q) and E(q)/dq are adapted to the detected values of V and I whileηand R are being changed in value.δ1 =V-E(q)-I×R, #2 =(dV/dt)-I×[dE(q)/ dq-R×(dI/dt), S=σd1 <2> +δ2 <2> . |
