Patent ID: 7078908

Claim:
A voltage detecting apparatus for a combination battery comprising: a multiplexer type flying capacitor voltage detecting circuit having an input multiplexer and an output side sampling switch, whose operation timing is controlled in response to an entered switching control signal for time sequentially executing voltage read-in processing and voltage read-out processing to detect the voltage of a plurality of battery modules of a combination battery in a time sequential fashion; a synchronous control type A/D converter whose operation timing is controlled in response to an entered activation signal for sample holding and A/D converting an analog output voltage of said flying capacitor voltage detecting circuit, and holding a digital voltage signal as a resulting output until a succeeding digital voltage signal is obtained; and a battery controller whose operation timing is controlled in response to an entered transfer command signal for reading said digital voltage signal produced from said A/D converter and storing the readout digital voltage signal into a data storage area assigned to each of said battery modules, wherein said battery controller comprises a timing table on which generation timings of said switching control signal, said activation signal, and said transfer command signal are all determined on a common time axis, and timing control for said flying capacitor voltage detecting circuit, said A/D converter, and said battery controller is carried out by outputting said switching control signal, said activation signal, and said transfer command signal to said flying capacitor voltage detecting circuit, said A/D converter, and said battery controller at the timing regulated in said timing table and according to an order memorized in said timing table.