BATTERY SYSTEM MONITOR DEVICE

摘要

A communication convertor circuit (5) converts a communication signal output from a control circuit (6) in accordance with a first encoding system to a communication signal in accordance with a second encoding system that is different from the first encoding system and outputs the converted communication signal to a monitor (IC21). Monitors (IC21, 22) transmit the communication signal in accordance with the second encoding system in the order of communication. The communication convertor circuit (5) converts the communication signal output from the monitor (IC22) in accordance with the second encoding system to a communication signal in accordance with the first encoding system and outputs the converted communication signal to the control circuit (6). The control circuit (6) observes the waveform of the communication signal output from the communication convertor circuit (5) to the monitor (IC21) and the waveform of the communication signal output from the monitor (IC22) to the communication convertor circuit (5), and detects the failure of the communication convertor circuit (5) on the basis of the observed waveforms. According to the above configuration, the failure of the communication convertor circuit may be reliably detected.