Patent ID: 9373970
Filing Date: 2016-06-21
CPC Classification: B60L,H02J,Y02E,Y02T

Claim Text:
1. A system for charging at least one energy reservoir cell in a controllable energy reservoir, which serves to control and supply electrical energy to an n-phase electrical machine, where n≧2, where the controllable energy reservoir has n parallel energy supply branches that each have at least two energy reservoir modules, connected in series, that each encompass at least one electrical energy reservoir cell having an associated controllable coupling unit, are connectable to a reference bus, and are connectable to a respective phase of the electrical machine, comprising: a charging device having a negative pole and a positive pole, wherein as a function of control signals, the coupling units interrupt the respective energy supply branch or bypass the respectively associated energy reservoir cells or switch the respectively associated energy reservoir cells into the respective energy supply branch; wherein the negative pole of the charging device that makes available a DC voltage for charging at least one energy cell is connectable via at least one respective free-wheeling diode to at least two phases of the electrical machine, wherein the negative pole of the charging device is connectable to the reference bus, and wherein those energy supply branches which are connected to those phases which are connectable to the negative pole of the charging device each have a contact point that is disposed between two energy reservoir modules of the respective supply branch and is connectable via at least one free-wheeling diode to the positive pole of the charging device.