Patent ID: 8310240

Claim:
A monitoring circuit for an energy storage device, the energy storage device having a multiplicity of cells each having a first terminal and a second terminal, that provide a voltage in each case between the first terminal and second terminal, and which are connected in series, wherein in each case the second terminal of a first cell is connected to the first terminal of a second cell, the monitoring circuit comprising: at least two voltage-measuring circuits including a first voltage-measuring circuit and a second voltage-measuring circuit each having a first measuring input and a second measuring input, said voltage-measuring circuits each measuring a voltage between said first measuring input and said second measuring input of said voltage-measuring circuits, said second measuring input of said first voltage-measuring circuit is connected to said first measuring input of said second voltage-measuring circuit; a first connecting lead for connecting the first terminal of the first cell to said first measuring input of said first voltage-measuring circuit; a second connecting lead for connecting the second terminal of the first cell to said second measuring input of said first voltage-measuring circuit; and a first loading resistor capable of being switched between said second measuring input of said first voltage-measuring circuit and a first fixed potential.