| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a charged state estimation method and a charged state estimation device for secondary battery, capable of improving estimation precision of the charged state of the secondary battery. Ž<P>SOLUTION: The charged state estimation method of a secondary battery comprises: a first step S1 for measuring the battery voltage value, charge/discharge current value, and battery temperature of the secondary battery; a second step S2 for calculating the internal resistance value of the secondary battery, by correcting a given internal resistance reference value, based on the battery temperature and the charged state of the secondary battery obtained one calculation period before; a third step 3 for calculating the amount of voltage change by internal resistance, based on the internal resistance value and charge/discharge current value; a fourth step S4 for calculating the amount of change in a dynamic voltage according to a charge/discharge history, based on the internal resistance value and charge/discharge current value; a fifth step S5 for calculating the electromotive voltage of the secondary battery, based on the battery voltage value, the amount of voltage change by the internal resistance, and the amount of change in a dynamic voltage by the charge/discharge history; and a sixth step S6 for estimating the charged state of the secondary battery, based on the electromotive voltage of the secondary battery. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
|
