DEVICE AND METHOD FOR DISCHARGING AN ENERGY ACCUMULATOR IN A HIGH-VOLTAGE GRID
First Claim
1. A device for discharging an energy storage device (C) in a high-voltage network (3), havinga direct-current converter (5) connected downstream of the high-voltage network (3),a low-voltage network (4) connected downstream of the direct-current converter (5),an energy supply network (7) connected downstream of the direct-current converter (5) and connected in parallel to the low-voltage network (4) for supplying energy to a control circuit (9) of the direct-current converter (5) anda first controllable switching element (S) that is connected in the connecting line between the direct-current converter (5) and the low-voltage network (4) wherein in the case of a malfunction of the low-voltage network (4) the direct-current converter (5) and the energy supply network (7) can be separated from the low-voltage network (4).
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Accused Products
Abstract
The invention relates to a device and method for discharging an energy accumulator (C), in particular an intermediate circuit capacitor, in a high-voltage grid (3), in particular in a direct current intermediate circuit in a motor vehicle, having a direct current converter (5) connected downstream of the high-voltage grid (3), a low-voltage grid (4) connected downstream of the direct current converter (5), an power grid (7) connected downstream of the direct current converter (5) and parallel to the low-voltage grid (4) for supplying energy to a control circuit (9) of the direct current converter (5), and a first controllable switching element (S) which is connected to the connecting line between the direct current converter (5) and the low-voltage grid (4) and by means of which, in the event of a disturbance of the low-voltage grid (4), the direct current converter (5) and the power grid (7) can be disconnected from the low-voltage grid (4). The power grid (7) is connected to the direct current converter (5) via a first electrical component (10; 20) which prevents a backflow of current from the power grid (7) into the direct current converter (5).
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Citations
19 Claims
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1. A device for discharging an energy storage device (C) in a high-voltage network (3), having
a direct-current converter (5) connected downstream of the high-voltage network (3), a low-voltage network (4) connected downstream of the direct-current converter (5), an energy supply network (7) connected downstream of the direct-current converter (5) and connected in parallel to the low-voltage network (4) for supplying energy to a control circuit (9) of the direct-current converter (5) and a first controllable switching element (S) that is connected in the connecting line between the direct-current converter (5) and the low-voltage network (4) wherein in the case of a malfunction of the low-voltage network (4) the direct-current converter (5) and the energy supply network (7) can be separated from the low-voltage network (4).
Specification