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Circuit arrangement for discharging at least one energy store charged to high voltage

A technology of circuit device and discharge circuit, which is applied in the direction of battery circuit device, electrical device, circuit device, etc., and can solve the problems of expensive, troublesome insulation requirements, battery cable breakage, etc.

Pending Publication Date: 2022-03-18
VTESCO TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the discharge circuit requires a voltage supply which, however, may be interrupted in the event of a vehicle accident because, for example, a cable of a 12-volt vehicle battery breaks
When designing the discharge circuit, the use of high voltages for the voltage supply leads to complex insulation requirements and requires high-voltage-resistant and therefore expensive components

Method used

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  • Circuit arrangement for discharging at least one energy store charged to high voltage
  • Circuit arrangement for discharging at least one energy store charged to high voltage

Examples

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Embodiment Construction

[0030] figure 1 An energy store ES is shown schematically, which is connected between two high-voltage lines each having a high potential HV_DC+ and a low potential HV_DC−. Here, the energy store ES can be formed by one or more capacitors, which are used either as smoothing capacitors for current and voltage peaks or, if required, to enable higher load currents to support the high-voltage battery, said capacitors being A protection switch (not shown) is connected to the high voltage battery.

[0031] To discharge the energy storage ES, the figure 1 In the exemplary embodiment shown, a series circuit consisting of a discharge resistor RD and a discharge transistor TD is connected in parallel to the energy store ES, the discharge transistor TD being in the exemplary embodiment shown as an IGBT (insulated gate bipolar transistor). The discharge transistor TD is controlled by a driver circuit TS which is powered on the one hand by eg a 12 volt supply and on the other hand is co...

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PUM

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Abstract

The invention relates to a circuit arrangement for discharging at least one energy store (ES) charged to a high voltage in a motor vehicle, comprising: a discharge circuit (RD, TD; DC-DC1, DC-DC2) connected in parallel to the energy store (ES); an auxiliary microcontroller (MC1) for controlling the discharge circuits (RD, TD, DC-DC1, DC-DC2), which can be operated at a low voltage of 3 to 5 volts; a first voltage supply circuit (SV1) for supplying a low voltage of 3-5 volts to the auxiliary microcontroller (MC1), the first voltage supply circuit being supplied with a voltage of 10-15 volts by a buffer capacitor (CPuffer); and a main microcontroller (MC2), which is designed to control an auxiliary microcontroller (MC1) for controlling the discharge circuits (RD, TD; DC-DC1, DC-DC2).

Description

technical field [0001] The invention relates to a circuit arrangement for discharging at least one energy store charged to a high voltage in a motor vehicle, the circuit arrangement having a discharge circuit connected in parallel to the energy store. Background technique [0002] Such a circuit arrangement is known from DE 10 2016 222 632 A1. In this document, before discharging an accumulator charged to high voltage, first a short test discharge is carried out by means of a timer, and during this process said accumulator is checked by means of a voltage drop detector or a rate detector (here is the intermediate circuit capacitor) is separated from the high voltage battery and can thus be discharged without the risk of excessive current flow from the high voltage battery. Only then does the discharge take place under the control of the voltage drop detector. The timer and the voltage drop detector may be implemented in a microcontroller, wherein the microcontroller may be...

Claims

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Application Information

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IPC IPC(8): B60L3/00B60L3/04B60L58/00B60L58/10
CPCB60L3/0007B60L3/0046B60L3/04B60L58/00B60L58/10Y02T10/70B60L53/20H02J2207/20B60L2210/10
Inventor F-C·贝林德S·利卡A·科特拉
Owner VTESCO TECH GMBH