Patent ID: 8058877

Claim:
Circuit for measuring battery voltage comprising: a battery that is composed of k voltage sources that are connected in series to one another; (k+1) switching elements, includes the k switching elements being sequentially connected to positive poles of the k voltage sources, one switching element being connected to a negative pole of a last voltage source of the k voltage sources; n nodes to which the (k+1) switching elements are alternately connected; a voltage charging unit in which n capacitors are connected to one another to form a closed loop, and the n nodes are sequentially connected in between the n capacitors; n voltage measuring units that are sequentially connected to both ends of the n capacitors; and a sampling switching unit that is connected between the voltage charging unit and the n voltage measuring units, wherein the k is a natural number of 2 or more, and the n is a natural number of 3 or more.