| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method and device for estimating an open circuit voltage of a battery capable of estimating accurately an open circuit voltage relative to a voltage change characteristic of various patterns of the battery after finish of charge or discharge. <P>SOLUTION: The device includes: an open voltage transition determination means 23a-2 for determining transition of the open voltage of the battery after finish of charge or discharge; the first open circuit voltage estimation means 23a-4 for estimating the open circuit voltage by executing open circuit voltage estimation processing after finish of charge, when the determination results are decreased continuously; the second open circuit voltage estimation means 23a-5 for estimating the final voltage of sampling as the open circuit voltage, when the determination results are decreased and then becomes constant; the third open circuit voltage estimation means 23a-6 for estimating the open circuit voltage by executing open circuit voltage estimation processing after finish of discharge, when the determination results are increased continuously; and the fourth open circuit voltage estimation means 23a-7 for estimating the open circuit voltage by executing the open circuit voltage estimation processing after finish of charge in a section where the voltage is lowered after reaching the maximum voltage, when the determination results are increased and then decreased. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
