Shutdown device for a high-voltage system of an electrically powered vehicle and method for operating a shutdown device

Abstract

The invention relates to a shutdown device (10) for a high-voltage system (100) of an electrically operated vehicle, comprising at least an active discharge device (12) for capacitors coupled to high-voltage circuits, an isolated input (14) for high-voltage voltage measurements, an internal crash monitoring device (16), a crash signal interface (18) with at least one input and at least one output, a shutdown device (20) for the crash signal by means of which the crash monitoring device (16) is coupled to the crash signal interface (18), a CAN gateway (22) for coupling to a vehicle CAN network (24), and an input (26) for an emergency shutdown signal. The invention further relates to a method for operating a shutdown device (10).

Description

[0001] The invention relates to a shutdown device for a high-voltage system of an electrically operated vehicle and to a method for operating a shutdown device for a high-voltage system of an electrically operated vehicle.

[0002] In the early stages of vehicle development, sometimes not all aspects of high-voltage safety can be met by components at the early development stage. Mechanical emergency switches are typically available that can be activated on demand, but do not allow for automatic shutdown of the high-voltage system. A crash signal, the so-called terminal 30c, represents a shutdown signal that deactivates the battery main switch of an electrically powered vehicle.

[0003] An object of the invention is to provide a shutdown device for a high-voltage system of an electrically operated vehicle, which enables automatic shutdown of the high-voltage system.

[0004] A further object is to provide a method for operating such a shutdown device for a high-voltage system of an electrically operated vehicle.

[0005] The above-mentioned objects are solved by the features of the independent claims.

[0006] Advantageous embodiments and advantages of the invention emerge from the further claims, the description and the drawing.

[0007] According to one aspect of the invention, a shutdown device for a high-voltage system of an electrically operated vehicle is proposed, at least comprising an active discharge device for capacitances which are coupled to high-voltage circuits, an isolated input for high-voltage voltage measurements, an internal crash monitoring device, a crash signal interface with at least one input and at least one output, a shutdown device for the crash signal, by means of which the crash monitoring device is coupled to the crash signal interface, a CAN gateway for coupling to a vehicle CAN network, and an input for an emergency shutdown signal.

[0008] A shutdown device is proposed to increase high-voltage safety in development vehicles where high-voltage safety is not yet ensured by the components and development stages themselves. In addition to the familiar manual shutdown of the high-voltage system, the shutdown of the high-voltage system is now performed via an additional component, only in the development environment, which can reliably implement safety aspects, such as a crash signal and CAN signals, and can then automatically shut down the high-voltage system.

[0009] This makes it possible to ensure that development vehicles are high-voltage safe in the early development phases of vehicles, before all components are approved. Advantageously, testing in vehicles can be carried out at an earlier stage.

[0010] This can advantageously shorten development time and improve the quality of components because errors in hardware and software can be detected earlier.

[0011] According to an advantageous embodiment, the shutdown device can further comprise an interface to a charging device of the vehicle. This ensures the safety of the charging process.

[0012] According to an advantageous embodiment, the shutdown device can further comprise at least one voltage indicator for a high-voltage voltage. In particular, the at least one voltage indicator can be designed as an indicator light. This makes the presence of high-voltage voltages more clearly recognizable.

[0013] According to an advantageous embodiment, the shutdown device can further comprise an overtemperature shutdown device, which is coupled to at least one external temperature measuring device and which is coupled to the shutdown device for the crash signal. Temperature increases due to defects in the vehicle can thus be incorporated into the safety concept.

[0014] According to an advantageous embodiment of the shutdown device, the crash signal interface can be coupled to a crash signal interface of a high-voltage battery of the vehicle. This allows the high-voltage system to be safely shut down in the event of a crash.

[0015] According to an advantageous embodiment of the shutdown device, the CAN gateway can be coupled to at least the high-voltage battery and / or a vehicle control unit. This ensures that all essential components in the vehicle are included in the safety concept.

[0016] According to a further aspect of the invention, a method for operating a shutdown device for a high-voltage system of an electrically operable vehicle is proposed, wherein a shutdown device is opened for a crash signal and an active discharge of capacitances coupled to high-voltage circuits is carried out when a high-voltage safety shutdown is requested via a CAN network of the vehicle, and / or when a crash is detected by means of an internal crash monitoring device, and / or when an overvoltage is detected by an external high-voltage voltage measuring device; and / or when the triggering of an emergency switch is detected via an input for an emergency shutdown signal.

[0017] This makes it possible to ensure that development vehicles are high-voltage safe in the early development phases of vehicles, before all components are approved. Advantageously, testing in vehicles can be carried out at an earlier stage.

[0018] This can advantageously shorten development time and improve the quality of components because errors in hardware and software can be detected earlier.

[0019] According to an advantageous embodiment of the method, information about a vehicle's charging device can be used to assess the need for a safety shutdown. This ensures the safety of the charging process.

[0020] According to an advantageous embodiment of the method, information from an external temperature measuring device can be used to assess the need for a safety shutdown. Temperature increases caused by defects in the vehicle can thus be incorporated into the safety concept.

[0021] According to an advantageous embodiment of the method, at least one high-voltage battery and / or a vehicle control unit can be informed of a safety shutdown. This ensures that all essential components in the vehicle are included in the safety concept.

[0022] Further advantages will become apparent from the following description of the drawings. The drawings illustrate an exemplary embodiment of the invention. The drawings, the description, and the claims contain numerous features in combination. Those skilled in the art will also expediently consider the features individually and combine them into useful further combinations.

[0023] It shows: Fig. 1 a system overview of a high-voltage system of an electrically operated vehicle with a shutdown device according to an embodiment of the invention.

[0024] In the figure, identical or similar components are numbered with the same reference numerals. The figure shows only an example and is not to be understood as limiting.

[0025] Fig.1 shows a system overview of a high-voltage system 100 of an electrically operated vehicle with a shutdown device 10 according to an embodiment of the invention.

[0026] The shutdown device 10 comprises an active discharge device 12 for capacitors coupled to high-voltage circuits. Furthermore, the shutdown device 10 has an isolated input 14 for high-voltage voltage measurements via a high-voltage voltage measuring device 46.

[0027] The high-voltage voltage measuring device 46 can, for example, monitor the following signals: DC-Link, DC-In, AC-In, AUX-Out.

[0028] The shutdown device 10 further comprises an internal crash monitoring device 16, a crash signal interface 18, the so-called terminal 30c, with at least one input and at least one output, and a shutdown device 20 for the crash signal, by means of which the crash monitoring device 16 is coupled to the crash signal interface 18.

[0029] The shutdown device 10 has a CAN gateway 22 for connection to a vehicle CAN network 24, as well as an input 26 for an emergency shutdown signal. The input 26 is coupled to an emergency switch 48.

[0030] Furthermore, the shutdown device 10 comprises an overtemperature shutdown device 36, which is coupled to an external temperature measuring device 38. The overtemperature shutdown device 36 is also coupled to the shutdown device 20 for the crash signal.

[0031] Optionally, the disconnect device 10 can have an interface 28 to a charging device 30 of the vehicle. The interface 28 can process analog and / or digital input signals. The charging device 30 can be a charging inlet and provide signals regarding the locking state of an actuator and / or the position of a charging inlet cover flap.

[0032] Furthermore, the shutdown device 10 can optionally have voltage displays 32, 34 for a high-voltage voltage, which can be designed, for example, as a control lamp.

[0033] The crash signal interface 18, terminal 30c, is coupled to a crash signal interface 42, also designed as terminal 30c, of a high-voltage battery 40 of the vehicle.

[0034] The CAN gateway 22 is coupled to the high-voltage battery 40 and a vehicle control unit 44. Other vehicle components can also be connected via the CAN network 24.

[0035] According to the proposed method for operating the shutdown device 10, the shutdown device 20 is opened for a crash signal and an active discharge of capacitances coupled to high-voltage circuits is carried out when a high-voltage safety shutdown is requested via a CAN network 24 of the vehicle.

[0036] In addition, the shutdown device 20 is opened and an active discharge is carried out when a crash is detected by the internal crash monitoring device 16 or when an overvoltage is detected by an external high-voltage voltage measuring device 46.

[0037] The shutdown device 20 is also opened and an active discharge is carried out when triggering of the emergency switch 48 is detected via the input 26 for an emergency shutdown signal.

[0038] Information about a charging device 30 of the vehicle can also be used to assess the need for a safety shutdown.

[0039] Likewise, information from the external temperature measuring device 38 can be used to assess whether a safety problem exists.

[0040] The high-voltage battery 40 and / or the vehicle control device 44 can advantageously be informed of a safety shutdown via the CAN network 24. List of reference symbols 10 Shut-off device 12 Unloading device 14 isolated entrance 16 internal crash monitoring device 18 Crash signal interface 20 Crash signal shutdown device 22 CAN gateway 24 CAN network 26 Input for emergency shutdown signal 28 Interface to charging device 30 Charging device 32 Voltage display 34 Voltage display 36 Overtemperature shutdown device 38 external temperature measuring device 40 high-voltage battery 42 Crash signal interface 44 Vehicle control device 46 High-voltage voltage measuring device 48 emergency switches 50 additional vehicle components 100 high-voltage system

Claims

[1] Switch-off device (10) for a high-voltage system (100) of an electrically operable vehicle, comprising at least an active discharge device (12) for capacitances coupled to high-voltage circuits, an isolated input (14) for high-voltage measurements, an internal crash monitoring device (16), a crash signal interface (18) with at least one input and at least one output, a shutdown device (20) for the crash signal, by means of which the crash monitoring device (16) is coupled to the crash signal interface (18), a CAN gateway (22) for connection to a vehicle CAN network (24), an input (26) for an emergency shutdown signal. [2] Switch-off device according to claim 1, further comprising an interface (28) to a charging device (30) of the vehicle. [3] Switch-off device according to claim 1 or 2, further comprising at least one voltage indicator (32, 34) for a high-voltage voltage, in particular wherein the at least one voltage indicator (32, 34) is designed as a control lamp. [4] Switch-off device according to one of the preceding claims, further comprising an overtemperature switch-off device (36) which is coupled to at least one external temperature measuring device (38) and which is coupled to the switch-off device (20) for the crash signal. [5] Switch-off device according to one of the preceding claims, wherein the crash signal interface (18) is coupled to a crash signal interface (42) of a high-voltage battery (40) of the vehicle. [6] Switch-off device according to claim 5, wherein the CAN gateway (22) is coupled at least to the high-voltage battery (40) and / or a vehicle control device (44). [7] Method for operating a shutdown device (10) for a high-voltage system (100) of an electrically operable vehicle according to one of the preceding claims, wherein a shutdown device (20) is opened for a crash signal and an active discharge of capacitances coupled to high-voltage circuits is carried out, if a high-voltage safety shutdown is requested via a CAN network (24) of the vehicle, and / or when a crash is detected by an internal crash monitoring device (16), and / or when an overvoltage is detected by an external high-voltage voltage measuring device (46); and / or when triggering of an emergency switch (48) is detected via an input (26) for an emergency shutdown signal. [8] Method according to claim 7, wherein information about a charging device (30) of the vehicle is used to assess the need for a safety shutdown. [9] Method according to claim 7 or 8, wherein information from an external temperature measuring device (38) is used to assess the need for a safety shutdown. [10] Method according to one of claims 7 to 9, wherein at least one high-voltage battery (40) and / or a vehicle control device (44) are informed of a safety shutdown.

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