DIAGNOSTIC CIRCUIT FOR AN ENERGY STORAGE ELEMENT

摘要

The invention relates to an energy-storage element diagnostic circuit for a cell group in a cell composite of an energy storage element, in particular an energy storage element in a motor vehicle electric system, said diagnostic circuit being connected to voltage terminals of the cell group. In said circuit, a specific voltage level and/or current is impressed upon a diagnostic conductor, which can then be used for the interrogation of at least one monitored operating parameter of the cell group and/or cell composite, if a cell group voltage at the voltage terminals of the cell group exceeds a first threshold level and/or if the cell group voltage fails to reach a second threshold level. A regeneration method is carried out on the basis of such flags, said method distinguishing whether or not a cell is defective.