Charging circuit for precharging batteries for hybrid and electric vehicles

摘要

The invention relates to a battery device 19 with a battery cell unit, a battery housing 2, in which the battery cell unit is housed, an intermediate circuit capacitor 16, at least a first switching element 6 for connecting the battery cell unit with the DC link capacitor 16 and a charging circuit for the DC link capacitor 16, one to the first switching element 6 has a parallel series connection of a second switching element 7 and a second precharge 8. In this case, the intermediate circuit capacitor 16 can be electrically connected to the battery housing 2 via a third switching element 9 and a third pre-charging resistor 10. Thus, the battery case 2 and the Cy capacitors 14, 17 is precharged. A high current flow to the battery case 2 and the resulting negative electromagnetic interference fields are reduced accordingly. As a result, the robustness of the battery device 19 is increased.