| 主权项 |
1. A resistance measuring device for the load-independent measurement of the internal resistance (Ri) of an energy storage device, in particular in an electrical system of a motor vehicle, comprises:
an energy storage device coupled with an electrical system of a motor vehicle such that the energy storage device provides power to the electrical system along a power path from the energy storage device through the electrical system; a measuring circuit coupled in parallel with the energy storage device outside of the power path and comprising a component, a switch and a current measuring resistor coupled together in series, wherein the measuring circuit is configured to generate a current pulse by switchably electrically coupling the current measuring resistor to the component via closing the switch; and a measuring device coupled to positive and negative poles of the energy storage device and configured to measure a voltage drop (ΔU) of the energy storage device between the positive pole and the negative pole and to measure a current difference (Δi) across the current measuring resistor, wherein the component comprises a passive energy storage element, in particular as a capacitor. |
