| 摘要 |
An apparatus and a method for monitoring the state of a battery are disclosed in which a micro-processor is used to accurately measure the current state of a battery used for supplying electric power in electric automobiles and the like. The present invention includes: a plurality of passive modules with a micro-processor installed thereon for measuring the charge state of respective batteries; an active module for measuring the overall state of the batteries and for supervising the respective passive modules; and serial lines for connecting the passive modules and the active module. The passive modules compute the charge/discharge states of the respective batteries within certain time intervals to record the data into an internal RAM. The active module measures the overall charge/discharge state of the total batteries within certain time intervals, and receives the data on the charge/discharge states of the individual batteries through the serial communications. Then the active module compares these data to compute the overall battery residual capacity. With the present invention, the maintenance and wiring are easy to implement, and the exact time for charging the batteries can be known, thereby extending the life expectancy of the batteries.
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