Patent ID: 8193763

Claim:
A battery apparatus comprising: a battery module in which a plurality of unit battery cells are series-connected while a plurality of battery cells are series-connected electrically in each of the unit battery cells; first control apparatuses, one of which is provided for each of the plurality of unit battery cells and is connected electrically to the plurality of battery cells of the associated unit battery cell; a first signal transmitting path, which is constructed by connecting said first control apparatuses electrically, and which transmits a signal serially between said first control apparatuses; a second control apparatus; and a second signal transmitting path, which provides an insulating means for insulating an electrical connection, and which transmits a signal through said insulating means between the first control apparatuses and said second control apparatus which are connected electrically and serially; wherein the signal which transmits through said first transmitting path and said second transmitting path provides a plurality of areas including a synchronous field and data byte, and a serial data signal including a plurality of signals having high levels and low levels; wherein at least one of each of the first control apparatuses and said second control apparatus comprises a speed detection section for detecting the speed of the serial data signal from the signal which is written in the synchronous field of the serial data signal which is input from an additional control apparatus, a reception timing defining section for defining the reception timing for the serial data signal in accordance with the speed detected by the speed detection section, and a signal reading section for reading in the serial data signal at the timing of the reception timing defining signal.