| 摘要 |
PURPOSE:To accurately estimate the residual capacity of a battery in a short time after the completion of an electric charge and discharge. CONSTITUTION:The open-circuit voltage V(t) of a battery at the prescribed time after the completion of an electric charge is approximated with the function V(t)=(c)-(T+at+b)<-1>. The characteristic function F(t)=tXdV(t)/dt is set, open-circuit voltages V(t) at a plurality of times (t) are measured, and the time tMAX=b/a when the characteristic function F(t) becomes the maximum value is obtained. The convergent voltage (c) of the battery is obtained as c=2V(tMAX)- V(0) from the open-circuit voltage V(0) at the reference time t=0 and the open- circuit voltage V(tMAX) at the time tMAX. When the convergent voltage (c) is obtained, the residual capacity of the battery is estimated from the relationship between the convergent voltage and the residual capacity obtained experimentally. |
