KR102242061B1 - Apparatus for controlling for power of autonomous driving vehicle - Google Patents

Abstract

Disclosed is a power control device for an autonomous vehicle. The power control device for an autonomous vehicle of the present invention comprises: a power isolation switch which controls the power supply between a front-end junction block for supplying front-end power from a low voltage DC-DC converter (LDC) and a back-end junction block for supplying back-end power from a battery management system (BMS); and a back-end power switch which intermittently controls the back-end power supplied from the BMS to the back-end junction block. Each of the power isolation switch and the back-end power switch is switched according to whether a power supply error has occurred in each of the front-end power and the back-end power to supply the back-end power to a preset set load through the back-end junction block. Therefore, the stability of supply of power to the autonomous vehicle can be ensured.

Description

Power control device for autonomous vehicles {APPARATUS FOR CONTROLLING FOR POWER OF AUTONOMOUS DRIVING VEHICLE}

The present invention relates to a power control device of an autonomous vehicle, and more particularly, by additionally connecting a power supply module to a rear power supply, even if a failure occurs in either of the front power supply and the rear power supply, the load connected to the rear power supply is continuously maintained. It relates to a power control device for an autonomous vehicle that can supply power.

An autonomous vehicle that can autonomously drive to a destination by monitoring external information and grasping road conditions without the operator's manipulation is more important than a general vehicle because various sensors or computing system power are additionally applied, so power efficiency is important. That is, since it is a vehicle that is operated by sensors, an internal MCU, a steering device, etc. without a driver's intervention, when a problem occurs in internal power, there is a problem that may cause a major accident due to the absence of various sensors, steering devices, or brake power.

The power generation system in an autonomous vehicle causes a serious problem when the main power of the ECU controlling the vehicle is cut off due to an internal defect or an external factor while the autonomous vehicle is driving.

Accordingly, a conventional autonomous vehicle includes a low voltage DC-DC converter (LDC) and a battery as an in-vehicle power supply source, and is composed of a dual power supply that supplies power from these power sources to each electronic device in the vehicle.

However, the loads at the rear end of the power isolation unit receiving power from the battery may not be supplied with power from the battery in case of a power error, so that autonomous driving of an autonomous vehicle becomes impossible.

The background technology of the present invention is disclosed in Korean Patent Publication No. 10-1927154 (2018.12.04) of'electric vehicle power supply device and method'.

The present invention was invented to improve the above-described problems, and an object according to an aspect of the present invention is to further connect a power supply module to the rear power supply so that even if a failure occurs in either of the front power and the rear power, the The objective is to provide a power control device for an autonomous vehicle that can ensure the stability of the power supply of the autonomous vehicle by continuously supplying power to the connected load.

A power control device for an autonomous vehicle according to an aspect of the present invention includes a front junction block supplying front end power from a low voltage DC-DC converter (LDC) and a rear junction block supplying rear end power from a battery management system (BMS). A power isolation switch that regulates power supply between blocks; And a rear stage power switch for intercepting the rear stage power supplied from the BMS to the rear stage junction block, wherein each of the power isolation switch and the rear stage power switch is switched according to whether a power supply error occurs in each of the front power and the rear power. It is characterized in that the power of the rear stage is supplied to a preset load through the rear junction block.

The setting load of the present invention is characterized in that it includes a dual power load receiving both a front end power supply and a rear end power supply, a dual unit load dually provided to secure redundancy, and a safety and autonomous driving sensor load.

The dual power load of the present invention is characterized in that it includes at least one of a Motor Driven Power Steering (MDPS) system and an Advanced Driver Assistance Systems (ADAS).

The dual unit load of the present invention is characterized by including at least one of INTELLIGENT ELECTRONIC BRAKE (IEB), REDUNDANCY BRAKE CONTROL UNIT (RCU), and ELECTRONIC PARKING BRAKE (EPB) systems.

The safety and autonomous driving sensor load of the present invention is characterized in that it includes at least one of a cluster, an air control unit (ACU), a lidar sensor (LIDAR), and a radar sensor (RADAR).

The power isolation switch of the present invention is characterized in that it is opened when a power supply error occurs in the front power supply, and the power at the rear stage is supplied to the set load through the power switch at the rear stage.

The rear-stage power switch of the present invention is opened when a power supply error occurs in the rear-stage power source, and front-end power is supplied to the set load through the power isolation switch.

The present invention provides an auxiliary power module for supplying auxiliary power to the set load through the rear junction block; And an auxiliary switch that is switched according to whether or not a power supply error occurs in each of the front power and the rear power to cut off the auxiliary power supplied from the auxiliary power module to the set load.

The auxiliary power module of the present invention may include an auxiliary LDC separately provided in the LDC to convert a voltage supplied from a high voltage battery into a voltage required for operation of a set load; And an auxiliary battery provided separately from the battery and supplying power to the set load.

The auxiliary power switch of the present invention comprises: an auxiliary LDC switch for controlling auxiliary power supplied to the set load from the auxiliary LDC; And an auxiliary battery switch for controlling auxiliary power supplied to the set load from the auxiliary battery, wherein, when a power supply error occurs in at least one of a front-end power source and a rear-stage power source, each of the rear-stage power switches among the auxiliary LDC switches is turned off. Through the, it is characterized in that the power is supplied to the rear stage to the set load.

The power control device for an autonomous vehicle according to an aspect of the present invention further connects an auxiliary power supply module to the rear power supply to continuously supply power to the load connected to the rear power supply even if any one of the front power supply and the rear power supply fails. By making it possible to supply it, it is possible to secure the stability of power supply for autonomous vehicles.

1 is a block diagram of an apparatus for controlling power of an autonomous vehicle according to an embodiment of the present invention.
2 is a diagram illustrating a power supply at a rear stage when a power supply error occurs at a front end according to an embodiment of the present invention.
3 is a view showing a front end power supply in case of a rear end power supply error according to an embodiment of the present invention.
4 is a block diagram of an apparatus for controlling power of an autonomous vehicle according to another embodiment of the present invention.
5 is a diagram illustrating a power supply at a rear stage when a power supply error occurs at a front end according to another embodiment of the present invention.
6 is a view showing a front end power supply in case of a rear end power supply error according to another embodiment of the present invention.

Hereinafter, an apparatus for controlling power of an autonomous vehicle according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this process, the thickness of the lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of users or operators. Therefore, definitions of these terms should be made based on the contents throughout the present specification.

The implementation described herein may be implemented in, for example, a method or process, an apparatus, a software program, a data stream or a signal. Although discussed only in the context of a single form of implementation (eg, only as a method), the implementation of the discussed features may also be implemented in other forms (eg, an apparatus or program). The device may be implemented with appropriate hardware, software and firmware. The method may be implemented in an apparatus such as a processor, which generally refers to a processing device including, for example, a computer, a microprocessor, an integrated circuit or a programmable logic device, or the like. Processors also include communication devices such as computers, cell phones, personal digital assistants ("PDAs") and other devices that facilitate communication of information between end-users.

1 is a block diagram of an apparatus for controlling power of an autonomous vehicle according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating a power supply at a rear end when a power supply error occurs at a front end according to an embodiment of the present invention, and FIG. 3 Is a diagram showing a front end power supply in case of a rear end power supply error according to an embodiment of the present invention.

Referring to FIG. 1, a power control device for an autonomous vehicle according to an embodiment of the present invention includes a low voltage DC-DC converter (LDC) 10, a power electric (PE) junction block 20, and a general load 40. ), a rear junction block 60, set loads 71, 72, and 80, a Battery Management System (BMS) 90, and a battery 100.

The set load (71, 72, 80) includes a dual power load (80) that receives dual power including a front-end power source and a rear-stage power source, and a dual unit load (71) that is dually provided to secure redundancy, and safety and autonomy. Includes a travel sensor load 72.

Here, the dual power load 80 includes at least one of a Motor Driven Power Steering (MDPS) system and an Advanced Driver Assistance Systems (ADAS).

The dual power load 80 is connected to the front junction block 30 and the rear junction block 60, respectively, to receive the front power and the rear power, respectively.

The dual power load 80 operates using one of a front end power source from the front end junction block 30 and a rear end power source supplied from the battery 100 through the BMS 90.

The dual power load 80 is an essential device for autonomous driving, and power supply must be ensured during autonomous driving operation. Accordingly, as described above, the dual power load 80 receives the front end power from the LDC 10 and the rear end power from the BMS 90 as main power and sub power, respectively.

The dual unit load 71 includes at least one of INTELLIGENT ELECTRONIC BRAKE (IEB), REDUNDANCY BRAKE CONTROL UNIT (RCU), and ELECTRONIC PARKING BRAKE (EPB) systems.

The dual unit load 71 is connected to the rear junction block 60 to receive any one of a front-end power and a rear-end power to perform an operation of an autonomous vehicle.

The safety and autonomous driving sensor load 72 includes at least one of a cluster, an AIRBAG control unit (ACU), a lidar sensor, and a radar sensor RADAR.

An autonomous vehicle includes an LDC 10 (Low Voltage DC-DC Converter) and a battery 100 as an in-vehicle power supply, and power from these power sources (LDC 10 and battery 100) is supplied in the vehicle. Supplied to each electric equipment.

In this case, the power supplied from the LDC 10 is referred to as a front-end power supply and the power supplied from the battery 100 is referred to as a rear-stage power supply. Here, the front-end power is supplied through the LDC (10), and the rear-stage power is supplied through the rear-stage junction block (60).

The front power and the rear power may be cut off through the power isolation switch 50. This will be described later.

The LDC 10 converts and supplies a voltage supplied from the high voltage battery 100 (not shown) into a voltage required for the operation of an electric device in an autonomous vehicle. The front-end power supplied from the LDC (10) is supplied to the general load (40) through the front-end junction block (30) or to the power isolation switch (50) through the PE junction block (20) and the front-end junction block (30). do.

The high voltage battery 100 may be a 48V lithium-ion battery.

The PE junction block 20 supplies front-end power supplied from the LDC 10 to the rear-stage junction block 60 through the fuse 150A and supplies the front-end power supply to the front-end junction block 30.

The front-end junction block 30 transfers the front-end power supplied from the PE junction block 20 to the general load 40, the dual power load 80, the dual unit load 71, and the safety and autonomous driving sensor load 72. To supply.

As described above, the general load 40 operates with the front end power supplied from the front end junction block 30 from the LDC 10.

The rear junction block 60 sets the front end power supplied from the front junction block 30 through the power isolation switch 50, for example, a dual power load 80, a dual unit load 71, or a safety and autonomous driving sensor. The rear stage power supplied to the load 72 or supplied from the BMS 90 through the rear stage power switch 110 is supplied to the set loads 80, 71 and 72.

The power isolation switch 50 and the rear power switch 110 may be installed within the rear junction block 60, but may be separately installed outside the rear junction block 60.

The power isolation switch 50 regulates power supply between the front junction block 30 and the rear junction block 60.

That is, the power isolation switch 50 is installed inside or outside the rear junction block 60 to electrically connect or cut off the front junction block 30 and the rear junction block 60.

For example, when a power supply error occurs in the front-end power supply, the power isolation switch 50 is opened, so that the front-end power in an abnormal state is not supplied to the rear-stage junction block 60. In this embodiment, the front-end power error is an electrical error such as a short circuit generated between the fuse and the power isolation switch 50.

On the other hand, when a power supply error occurs in the rear stage power supply, the power isolation switch 50 is opened, and thus, the rear stage power in an abnormal state is not supplied to the rear stage junction block 60. In this embodiment, the rear stage power error is an electrical error such as a short generated between the BMS 90 and the rear stage power switch 110.

In this way, the power isolation switch 50 is opened when a power supply error occurs in either of the front-end power and the rear-end power, and through this, the front-end power in an abnormal state is not supplied to the set load through the rear-stage junction block 60. And, it is prevented that the power after the abnormal state is transmitted to the LDC (10).

The battery 100 supplies power necessary for the operation of various loads, for example, a set load, as described above, that is, power at a rear stage. The battery 100 is a low voltage battery 100 and may be a 12V lithium-ion battery.

The BMS 90 manages the state of the battery 100. The BMS 90 supplies the rear stage power supplied from the battery 100 to the rear stage junction block 60. In addition, the BMS 90 may detect voltage, current, and temperature of the battery 100 to estimate SOC (State Of Charge) by calculation, and control the SOC so that the fuel consumption efficiency of the vehicle is best.

The rear stage power switch 110 regulates the rear stage power supplied to the set load through the BMS 90. The rear stage power switch 110 is opened when an error occurs in the rear stage power supply, thereby preventing the supply of the rear stage power in an abnormal state to the rear stage junction block 60.

An operation process of the power control device for an autonomous vehicle according to an embodiment of the present invention is as follows.

For example, when a power supply error occurs in the front-end power supply, the power isolation switch 50 is opened to cut off the supply of the front-end power in an abnormal state.

Accordingly, the rear stage power from the battery 100 is supplied to the set load through the rear stage power switch 110.

That is, even if a front-end power supply error occurs, the front-end power is supplied to the dual power load 80 through the front-end junction block 30 as shown in FIG. 2, and the rear-end power is dual power through the rear-end power switch 110. By being supplied to the load 80, the dual power load 80 is supplied with dual power such as a front end power source and a rear end power source.

In addition, the rear stage power can be supplied to the dual unit load 71 and the safety and autonomous driving sensor load 72 through the rear stage power switch 110.

On the other hand, when a supply supply error occurs to the rear stage power supply, the rear stage power switch 110 is opened. Accordingly, the supply of power to the rear stage in an abnormal state is cut off.

Accordingly, the front end power from the LDC 10 is supplied from the power isolation switch 50 to the set load.

That is, even if a rear stage power supply error occurs, front end power is supplied to the dual power load 80 through the front junction block 30 and from the LDC 10 through the power isolation switch 50 as shown in FIG. 3. By supplying the front end power of the double load, the double power load 80 is supplied with the front end power from the front end junction block 30 and the power isolation switch 50, respectively.

In addition, the front-end power may be supplied to the dual unit load 71 and the safety and autonomous driving sensor load 72 through the power isolation switch 50.

FIG. 4 is a configuration diagram of a power control apparatus for an autonomous vehicle according to another embodiment of the present invention, and FIG. 5 is a view showing power supply at a rear stage when a power supply error occurs at a front end according to another embodiment of the present invention, and FIG. 6 Is a diagram showing a front end power supply in case of a rear end power supply error according to another embodiment of the present invention.

4 to 6, the autonomous vehicle according to an embodiment of the present invention may further include an auxiliary power module 120 and an auxiliary power switch to secure power supply stability to the autonomous vehicle.

The auxiliary power module 120 further supplies additional auxiliary power in addition to the above-described front power and rear power, and includes an auxiliary LDC 121 and an auxiliary battery 122. The number of the auxiliary LDC 121 or the auxiliary battery 122 is not particularly limited. The auxiliary LDC 121 or the auxiliary battery 122 may respectively supply power to the set load.

The auxiliary power switch 1300 intercepts the auxiliary power supplied from the auxiliary power module 120. That is, the auxiliary power switch 130 is connected to each of the auxiliary LDC 121 and the auxiliary battery 122 to supply power therefrom. It includes an auxiliary LDC switch 131 and an auxiliary battery switch 132 for controlling the auxiliary LDC switch 131 and the auxiliary battery switch 132 may be installed in the rear junction block 60.

That is, the auxiliary LDC switch 131 intercepts the auxiliary LDC power supplied from the auxiliary LDC 121 to the set load, and the auxiliary battery switch 132 intercepts the auxiliary battery power supplied from the auxiliary battery 122 to the set load. do.

For example, as shown in Figs. 5 and 6, when the power isolation switch 50 or the rear power switch 110 is opened according to the occurrence of the front power supply error or the rear power supply error, these auxiliary LDC switches ( The auxiliary LDC 121 power may be supplied from the auxiliary LDC 121 by closing 131, or the auxiliary battery 122 may be supplied from the auxiliary battery 122 by closing the auxiliary battery switch 132.

In this way, the power control device of an autonomous vehicle according to an embodiment of the present invention further connects an auxiliary power supply module to the rear power supply, so that even if a failure occurs in either of the front power and the rear power, the load connected to the rear power supply is By ensuring that power is continuously supplied, it is possible to secure power supply stability for autonomous vehicles.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is only exemplary, and those of ordinary skill in the art to which the present technology pertains, various modifications and other equivalent embodiments are possible. I will understand. Therefore, the true technical protection scope of the present invention should be determined by the following claims.

10: LDC 20: PE junction block
30: shear junction block 40: normal load
50: power isolation switch 60: rear junction block
71: dual unit load 72: safety and autonomous driving sensor load
80: dual power load 90: BMS
100: battery 110: rear power switch
120: auxiliary power module 121: auxiliary LDC
122: auxiliary battery 130: auxiliary power switch
131: auxiliary LDC switch 132: auxiliary battery switch

Claims (10)

A power isolation switch for intermittent power supply between a front-end junction block supplying front-end power from a low voltage DC-DC converter (LDC) and a rear-stage junction block supplying rear-stage power from a battery management system (BMS); And
Including a rear stage power switch for controlling the rear stage power supplied to the rear stage junction block from the BMS,
Each of the power isolation switch and the rear power switch is switched according to whether a power supply error occurs in each of the front power and the rear power to supply power to a preset load through the rear junction block,
An auxiliary power module supplying auxiliary power to the set load through the rear junction block; And an auxiliary power switch that is switched according to whether a power supply error occurs in each of the front power and the rear power to interrupt the auxiliary power supplied from the auxiliary power module to the set load,
The auxiliary power module may include an auxiliary LDC provided separately from the LDC to convert a voltage supplied from a high voltage battery into a voltage required for operation of a set load; And an auxiliary battery provided separately from the battery and supplying power to the set load,
The auxiliary power switch may include an auxiliary LDC switch for controlling auxiliary power supplied to the set load from the auxiliary LDC; And an auxiliary battery switch for controlling auxiliary power supplied to the set load from the auxiliary battery, wherein when a power supply error occurs in the front power supply and the rear power supply, the auxiliary LDC switch and the auxiliary battery switch are switched to provide the auxiliary Power control device for an autonomous vehicle, characterized in that supplying power to the set load from the LDC and the auxiliary battery.
The method of claim 1, wherein the setting load is
A power control device for an autonomous vehicle, comprising: a dual power load receiving both a front end power supply and a rear end power supply, a dual unit load dually provided to secure redundancy, and a safety and autonomous driving sensor load.
The method of claim 2, wherein the dual power load
Power control device for an autonomous vehicle, comprising at least one of a Motor Driven Power Steering (MDPS) system and an Advanced Driver Assistance Systems (ADAS).
The method of claim 2, wherein the dual unit load
A power control device for an autonomous vehicle, comprising at least one of an IEB (INTELLIGENT ELECTRONIC BRAKE), RCU (REDUNDANCY BRAKE CONTROL UNIT), and EPB (ELECTRONIC PARKING BRAKE) system.
The method of claim 2, wherein the safety and autonomous driving sensor load
A power control device for an autonomous vehicle, comprising at least one of an ACU (AIRBAG CONTROL UNIT), a lidar sensor, and a radar sensor.
The apparatus of claim 1, wherein the power isolation switch is opened when a power supply error occurs in the front power supply, and the rear power is supplied to the set load through the rear power switch.
The apparatus of claim 1, wherein the rear stage power switch is opened when a power supply error occurs in the rear stage power supply, and the front stage power is supplied to the set load through the power isolation switch.
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