| 摘要 |
<P>PROBLEM TO BE SOLVED: To measure a magnetic signal generated by a current in a battery during charge/discharge accurately without saturating the output of a magnetic sensor even in a strong noise environment, and to make the current distribution in a lithium ion battery visible in a magnetic measuring device of a battery. <P>SOLUTION: Prior to charge/discharge, magnetism of reverse phase from that of the magnetism measured by each magnetic sensor is generated in a cancel coil disposed around individual magnetic sensors. Subsequently, magnetic noise is reduced by subtracting magnetic data (magnetic data for correction) recorded before charge/discharge from the magnetic data during charge/discharge, thus measuring a magnetic signal generated from a lithium ion battery accurately during charge/discharge. <P>COPYRIGHT: (C)2013,JPO&INPIT |
