| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To accurately determine an excessive charge situation of a secondary battery formed of a plurality of battery cells at an early stage while attaining the low cost and compactness of a battery device. <P>SOLUTION: The monitoring-target cell 55x as a part of the plurality of battery cells 55 is formed so as to increase cell internal pressure at an early stage in comparison with the other normal battery cell 55 at the time of an excessive charge state of a battery 51 by adding a designated additive to an electrolyte, and a pressure sensor 56 for detecting cell internal pressure Pcell is arranged at the monitoring-target cell 55x. Then, in the battery device 50, it is determined that the battery 51 is in an excessive charge state when the cell internal pressure Pcell detected by the pressure sensor 56 continuously exceeds reference pressure Pref. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
