Battery cell monitoring circuit and battery cell monitoring system

A battery cell monitoring system, comprising:

• a plurality of battery cell monitoring circuits for monitoring battery cells connected in series;
• and
• a microcomputer that outputs an address signal containing address information designating one or more of the battery cell monitoring circuits for generating a data signal and a clock signal;
• wherein each battery cell monitoring circuit of the plurality comprises:
• an address input terminal for input of the address signal;
• an address output terminal for output of the address signal;
• a clock input terminal for input of the clock signal;
• a clock output terminal for output of the clock signal;
• a data output circuit for output of a data signal corresponding to a battery cell monitoring result;
• a data input terminal for input of the data signal from another battery monitoring circuit;
• a data output terminal;
• a multiplexer having an input terminal connected to the data input terminal and the data output circuit, wherein the multiplexer is configured to receive data signals through the data input terminal and from the data output circuit and to output the data signal received from the data output circuit when the battery cell monitoring circuit is the designated battery cell monitoring circuit and to output the data signal received through the data input terminal otherwise;
• and
• a flip-flop circuit having a clock input terminal for receiving the clock signal and a data terminal for receiving the data signal from the multiplexer, wherein the flip-flop circuit latches the data signal from the multiplexer in synchronization with the clock signal, and the latched data signal is output to the data output terminal.