Patent ID: 8154300

Claim:
A voltage measuring device comprising: a voltage measuring member for measuring a voltage across each unit cell in a block comprising a plurality of unit cells connected to each other in series; and a connecting member connecting each unit cell in the block to the voltage measuring member, wherein the connecting member includes: a setting member to set the number of the unit cells in the block to be connected to the voltage measuring member; an address setting member to set a unique address to the block; a controlling member to connect the connecting member to the voltage measuring member based on the number of the unit cells in the block set by the setting member; a battery generating member to generate and supply a specific voltage from an inputted voltage; and a voltage switching member comprising a plurality of first and second switches connected in parallel with one another, the first switches configured for electrical connection with the battery generating member and the second switches configure for electrical connection with the voltage measuring member, when the setting member sets the number of the unit cells in the block to be connected to the voltage measuring member then the top cell voltage of the unit cell in the block input into the battery generating member via the first switch and the second switch connects each unit cell in the block to the voltage measuring member.