KR102422038B1 - Electric Vehicle Virtual Power-net Emulator and the operation method thereof - Google Patents

Abstract

The virtual power system emulator according to the present invention includes at least one of an electronic device and electronic components simulating the electrical input/output characteristics of a part of the vehicle electrical system element component as it is, and at least one of the other part of the vehicle electrical system element component. In a state in which the real parts of the electronic device and the electronic parts and the at least one real part are electrically connected to each other, the electronic device and the electronic device so that the electrical characteristics, the operation, and the function of the electric/electronic part of the actual vehicle are simulated. Includes a virtual power system emulator controller (VPE controller) that controls and monitors components.

Description

Electric Vehicle Virtual Power-net Emulator and the operation method thereof

The present invention relates to verification and evaluation of a vehicle power supply system, and more particularly, to a system and method capable of quickly and accurately verifying and evaluating a vehicle power supply system under development.

In recent years, automobiles have an increasing number of electrical components, and generators, batteries, and power converters have appropriate structures and functions for the supply and recovery of electrical energy between electrical components responsible for generation, storage, and consumption of electrical energy in the vehicle. control so as to

To this end, by securing a power transmission path through a wire harness, connector, cable, terminal block, junction box (JB), etc., the in-vehicle power supply system as shown in FIG. 1 is configured.

The development of such a vehicle power system is the most fundamental design process in the process of developing a vehicle, and its importance has increased with the recent advent of vehicles driven only by electric energy, such as electric vehicles.

Under this background, in order to develop a new vehicle model or model, a generator, a battery, a load device, etc. constituting the power system are first secured, and the operation characteristics of the devices/parts are checked, and then the wire harness designed based on this. Since it was essential to check whether the vehicle power system operates stably through repeated experiments while developing/connecting connector products, etc., there has been a problem that requires a lot of development time and cost.

The existing method of developing/evaluating the real-world power system constituting the vehicle is to secure the parts and controllers that have been developed or have similar functions/performances, and then connect and operate the parts similar to the actual vehicle. By looking at it, the development was carried out as a process of identifying and supplementing the problems of the configured power supply system.

Recently, in terms of shortening development time and cost reduction, a software simulation-based system that virtually designs the power system structure for the entire vehicle before the actual part development time, and analyzes and improves the problems of the power system through software simulation. The development of the power supply system is being carried out by a number of automakers.

However, such software simulation-based power system development does not verify the actual generation, storage, and transmission of electrical energy, but only verifies it through software simulation based on the virtualization model. If the errors of non-modeled factors such as contact resistance are accumulated, the overall power system stabilization and optimization development will be difficult.

On the other hand, electric vehicles, which are showing a clear increase in recent years, are applied with a new high-voltage/low-voltage combined power system and a power conversion device for electric energy conversion such as inverters, converters, and chargers as shown in FIG. It has high-voltage and low-voltage batteries, which are very difficult to model in power system development.

In electric vehicles, it is relatively difficult to develop or model each element component in advance because the specifications and electrical characteristics of the electric power converter are very diversified compared to that of the existing internal combustion locomotive. In addition, in consideration of the situation in which the development period is gradually shortened to meet the rapidly changing market demands, the development of the power supply system for the new electric vehicle model and the development of component parts are being pursued at the same time.

Accordingly, the power supply system is drafted based on the minimum software simulation, and element parts development and electronic equipment development are performed in consideration of this. Power system development is in progress as a process of implementation.

In particular, in the case of HILS, software simulation and supply/transmission/recovery of electrical energy to the actual parts are performed by directly applying the hardware of the actual parts to be evaluated and processing the rest of the vehicle parts and parts as software models. As a result, the electrical characteristics and operation of the corresponding part become more realistic and practical than the software model, which is a method that can overcome some of the limitations of the existing software simulation.

However, even in the case of such HILS, it can be applied only when the hardware of the corresponding part is developed, and in particular, parts that require a large development period and cost, such as a high voltage battery, still have the existing high cost and long-term problems. There is a limit to the overall period and cost reduction for system development.

In the end, the power system development/evaluation method directly applying the existing real parts or the power system development/evaluation method in the form of developing a specific part using HILS and applying it are all related to the hardware manufacturing period, control logic optimization period, and operation of the corresponding part. It takes a long time to develop parts because of the need for error debugging, and the optimized function cannot be implemented. In the case of high-cost parts such as batteries, there is a problem that the cost of developing the parts greatly increases.

In addition, the simulation method consisting of only a software model has a problem in that the accuracy of the model determines the reliability of the development result, so a separate period for accurate modeling is required.

The present invention is an electric vehicle capable of complexly performing electric vehicle power system development verification and performance evaluation of power system components with reduced development period, reduced cost, and high accuracy in order to improve the problems of existing power system development and verification methods An object of the present invention is to provide a virtual power system emulator (VPE, Virtual Power-net Emulator) and an operating method thereof.

In addition, by providing VPE that can generate, store, transmit, consume, etc. actual electrical energy for all power system-related parts, a specific part or only a part of the part is applied if necessary, so that the entire power system can be controlled. By enabling the operation to be imitated, it is intended to reduce the time and cost required for component development, and to facilitate power system topology development and operation optimization.

In order to achieve the above object, the virtual power system emulator according to the present invention includes at least one of electronic devices and electronic components that simulate the electrical input/output characteristics of electrical component parts operated by electricity in a vehicle electrical system as they are; As a non-electric component of a vehicle electrical system, an actual component that is a junction box including a wire harness and a connector, and the electronic device and the electronic component are electrically connected to each other by the actual component, and a virtual power system emulator controller (VPE controller) that controls and monitors the electronic devices and electronic components so that characteristics, operations and functions are simulated.

The electronic devices and electronic components are selected in consideration of the electrical specifications of the vehicle electrical/electronic components to be copied, and have a communication function to communicate with the VPE controller, for example, a battery for a buffer, a charger/discharger, and an electronic load. , DC power supply, etc.

The actual parts are a high voltage junction box and a low voltage junction box including a wire harness, a connector, and the like.

According to another aspect of the present invention, a virtual battery system (VBS) for simulating the electrical characteristics of a high voltage battery operating in an electric vehicle identically, a virtual converter emulator (VCE) for simulating electric power converters, which are component parts of an electric vehicle, and an electric vehicle electric vehicle A virtual load emulator (VLE) that simulates a load, a junction box including a wire harness and a connector connecting the VBS, VCE and VLE, and a non-electric element component of an electric vehicle electric system, and communication with the VBS, VCE, and VLE and a virtual power system emulator including a VPE controller that controls to implement the electrical characteristics and operation of the electric vehicle component parts imitated by the VBS, VCE, and VLD is provided, and the emulator further includes a grid corresponding to an external power source can do.

The VBS is composed of a charger/discharger, a battery for a buffer, and a BMS emulator to simulate an actual high voltage battery, and the VCE is composed of a DC load, an AC load, a DC power source, an AC power source and a VCE controller to create an actual converter. It simulates, and the VLE is composed of a DC load and a VLE controller to simulate a low power consumption load of an actual vehicle.

The controller is a power system structure model, a vehicle model, a battery specification model, a specification model for each power converter, an interface model for each power converter, an electronic load model, an electronic load power consumption calculation module for each vehicle class/model, and a load pattern/power value implementation Including power consumption DB by model and load, battery initial value and environmental conditions, vehicle speed and vehicle environment, power system component/topology, vehicle class, vehicle model, power converter type, load type, number of loads, and power consumption by load It receives the input and processes it, outputs a charge/discharge control signal and a battery state value in relation to the battery, and outputs the amount of load power, the amount of power supplied, and the state value of the power converter in relation to the power converter, and the amount of power consumed and operation in relation to the load. Outputs the starting point, section, and state value.

According to another aspect of the present invention, the step of receiving and setting elements necessary for emulation including car model setting, power architecture setting, load model setting, battery initial state setting, vehicle speed & environmental condition setting, and setting of the analysis target The steps of implementing the operation logic, setting the target for analysis, performing virtual power system emulation, and analyzing the results of the execution step and determining whether or not the target is achieved and the appropriateness of the target based on the analysis result are included. A method for emulating a vehicle power supply system is provided.

If, as a result of the determination in the determining step, the goal is not achieved and the goal is appropriate, the process returns to the step of performing the virtual power system emulation and repeats the subsequent steps again. If it is not appropriate, the process returns to the step of setting the target for analysis and performs the subsequent steps again.

According to the present invention, a virtual power system emulator capable of generating, storing, transmitting, and consuming substantial electrical energy for all of the power system related parts is provided, so that a specific part can be applied or the corresponding part if necessary. It is possible to simulate the operation of the entire power system by applying only a part of it.

In this way, the time and cost required for component development can be reduced, and the power system topology can be developed and operation optimized.

1 is an exemplary diagram of a power supply system of an internal combustion engine vehicle;
2 is an exemplary diagram of an electric vehicle power supply system.
3 is a configuration diagram of a virtual power system emulator according to an embodiment of the present invention.
4 is a configuration diagram of a virtual power system emulator according to another embodiment of the present invention.
5 is a configuration diagram of a virtual power system emulator according to another embodiment of the present invention.
6 is an internal block diagram of a virtual power system emulator controller according to the present invention;
7 is a block diagram illustrating an external interface of a VPE controller when a virtualization module is applied according to another embodiment of the present invention.

Objects and effects of the present invention are not limited to those mentioned above, and the objects and effects of the present invention, and technical configurations for achieving them will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

In describing the present invention, if it is determined that a detailed description of a well-known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms. Each of the following examples are provided so that the disclosure of the present invention is complete, and to fully inform those of ordinary skill in the art to which the present invention belongs, the scope of the invention, and it is intended to limit the scope of the present invention not.

Throughout the specification, when a part "includes" or "includes" a certain element, it means that other elements may be further included, rather than excluding other elements, unless otherwise stated. . In addition, terms such as "...unit", "...device", "...device", "...unit" or "...module", "...means", etc. It means a unit for processing at least one function or operation, which may be implemented as hardware or software or a combination of hardware and software.

That is, terms such as '~ part', '~ module', and '~ means' in the present specification are divided for the convenience of explanation and enhancement of understanding of the technical idea of the present invention, and the H/ It is not intended to limit or limit the form of the W configuration.

On the other hand, in each embodiment of the present invention, each component, functional blocks or means may be composed of one or more sub-components, and the electrical, electronic, and mechanical functions performed by each component are electronic circuits. , an integrated circuit, an ASIC (Application Specific Integrated Circuit), etc. may be implemented as various well-known devices or mechanical elements, and may be implemented separately or two or more may be integrated into one.

The key point of the present invention is not a simulation using only a simple software model or HILS limited to the evaluation of specific parts, but a virtual power system emulator that simulates the actual generation, storage, transmission, and consumption of electrical energy for all power system related parts. (VPE, Virtual Power-net Emulator) is introduced. In this way, if necessary, the operation of the entire power system can be simulated by applying a specific component or only a part of the component, thereby reducing the time and cost required for component development and optimizing the power system topology development and operation.

Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a Virtual Power-net Emulator (VPE) and an operating method thereof for developing an electric vehicle power system. can do.

3 is an electric vehicle power supply system configuration example in FIG. 2, each electric vehicle element parts buffer battery 120 or chargers and dischargers 130, 440, electronic loads 230, 310, 320, 330, DC power supply 220, 240), etc., implemented as a combination of electronic devices or electronic components, and controlled by the electric vehicle virtual power system emulator controller (EV VPE controller) 500 to simulate the electrical characteristics, operations, and functions of each electric vehicle component. Power system emulator (EV VPE) is shown.

Elements converted into electronic devices or electronic components are shown in orange blocks, and actual parts are shown in white blocks.

The specifications of each electronic device or electronic component to be applied are selected in consideration of the electrical specifications of the electric vehicle components to be copied, and the communication function is implemented so that the virtual power system emulator controller can transmit commands and transmit/receive operating values through communication. should have It is advantageous for this communication function to have a quick response characteristic, and it is good to select a hardware method so that there is no transmission error of communication data. In the present invention, the communication method or speed is not limited to a specific value.

High voltage junction boxes (HV JB) 410 and low voltage junction boxes (LV JB #1, #2...) (420, 430) including wire harnesses and connectors are simulated in verification due to their structural characteristics. However, there are characteristics that cannot be accurately simulated by emulation, and therefore, actual components are applied to components having these characteristics.

4 shows another embodiment of the VPE according to the present invention, the VPE configuration diagram when the high-voltage battery part, which is an electric vehicle component, is applied as a virtual battery system (VBS) 100 as a separate virtualization module to be.

In the case of the embodiment of FIG. 4 , the VBS 100 can be implemented in any form as long as it has a structure capable of simulating the electrical characteristics of a high voltage battery operating in an electric vehicle. In the present invention, a method for implementing a high-voltage battery as a charger/discharger, a battery for a buffer, a BMS emulator, etc. is proposed as an example, and is not limited to a specific implementation method. However, the VBS must have a VBS controller 140 for control and data transmission/reception through communication connection with the EV VPE, and charging the high-voltage battery of an electric vehicle through communication between the VBS controller 140 and the EV VPE controller 500 and discharging operation.

As another embodiment, as in FIG. 5 , a virtual converter emulator (VCE: Virtual Converter) that simulates the electric characteristics of the high voltage battery operating in the electric vehicle as well as the electric vehicle element component power converter as well as the VBS (100). The EV VPE may be configured by applying the Emulator 200 or a Virtual Load Emulator (VLE) 300 simulating an electric vehicle electric load.

Even in this case, through communication between the controllers 140 , 260 , 340 of each virtualization module and the VPE controller 500 , the electrical characteristics and operations of the electric vehicle component parts that each virtualization module simulates are controlled to be implemented. Also, a grid 460 corresponding to an external power source and/or a power load may be included.

6 is an internal block diagram of the EV VPE controller for controlling the operation of the virtual power system in each of the above-described embodiments.

As shown, the VPE controller 500 calculates the power system structure model, the vehicle model, the battery specification model, the specification model for each power converter, the interface model for each power converter, the electronic load model, and the electronic load power consumption for each vehicle class/model Including module, load pattern/power value implementation model, and power consumption DB for each load, based on this, battery initial value and environmental conditions, vehicle speed and vehicle environment, power system components/topology, vehicle class, vehicle model, power converter type, load Receives power consumption by type, number of loads, and loads, and outputs a charge/discharge control signal and battery status value in relation to the battery In relation to the power consumption, the operation time and section, and the state value are output.

It goes without saying that the internal configuration of the VPE controller 500 may consist of individual hardware modules for processing for each model, and may consist of one or more processors and one or more software modules operating on the processors.

On the other hand, the parts corresponding to the output of FIG. 6 are transmitted through communication to the virtualization modules VBS 100, VCE 200, and VLE 300 rather than individual devices when the virtualization module as shown in FIG. 4 is applied, Data is received through communication from each virtualization module (100, 200, 300). This is shown in FIG. 7 .

Hereinafter, a process of performing power system operation characteristic analysis and optimization using the aforementioned virtual power system emulator (VPE) will be described with reference to FIG. 8 .

The VPE controller 500 receives and sets elements necessary for emulation, such as vehicle model setting, power architecture setting, load model setting, battery initial state setting, vehicle speed & environmental condition setting (S110).

Thereafter, the analysis target operation logic is implemented (S120), and an analysis target target is set (S130).

Then, the VPE is operated (S140), and the result is analyzed (S150).

Based on the analysis result, it is determined whether the goal is achieved (S160), and the appropriateness of the goal is determined (S161, S162). If the goal is achieved and the goal is appropriate, the result is reported (S170).

If the target is not achieved and the target is appropriate, return to step S140 and operate the VPE again to perform the subsequent steps again. Repeat the next step.

The configuration of the present invention has been described in detail with reference to some embodiments above. However, this is merely an example, and various modifications and changes are possible within the scope of the technical idea of the present invention. For example, each embodiment is described in terms of emulating the power supply system of an electric vehicle, but the technical spirit of the present invention is not limited thereto and can be applied to emulating the power supply system of an internal combustion engine vehicle as it is. Accordingly, the scope of the present invention should be defined by the description of the following claims.

Claims (15)

At least one of electronic devices and electronic components that simulate the electrical input/output characteristics of electrical component parts operated by electricity in the vehicle electrical system as they are;
An actual part that is a junction box including a wire harness and a connector as a non-electric element part of the vehicle electrical system;
A virtual power system emulator controller that controls and monitors the electronic device and the electronic component so that the electrical characteristic, operation and function of the electrical component is simulated while the electronic device and the electronic component are electrically connected to each other by the actual component. (VPE controller)
Virtual power system emulator that includes. According to claim 1, wherein the electronic device and the electronic components,
It is selected in consideration of the electrical specifications of the electric/electronic parts of the vehicle to be copied, and has a communication function to communicate with the VPE controller.
A virtual power system emulator. According to claim 1, wherein the electronic device and the electronic components,
A virtual power system emulator comprising at least one of a buffer battery, a charger/discharger, an electronic load, and a DC power supply. The method of claim 1 , wherein the actual component comprises:
Including high voltage junction boxes and low voltage junction boxes
A virtual power system emulator. A virtual battery system (VBS) that identically simulates the electrical characteristics of a high-voltage battery operating in an electric vehicle;
A virtual converter emulator (VCE) that simulates the electrical characteristics of an electric vehicle power converter,
A virtual load emulator (VLE) that simulates the electrical characteristics of an electric vehicle's electric load, and
A non-electric element component of an electric vehicle electric system, which is a junction box including a wire harness and a connector for connecting the VBS, VCE and VLE;
A VPE controller that communicates with the VBS, VCE, and VLE and controls to implement the electrical characteristics and operation of the electric vehicle component parts that the VBS, VCE, and VLD simulate.
Virtual power system emulator that includes. 6. The method of claim 5,
A virtual power system emulator further comprising a grid corresponding to an external power source. According to claim 5, wherein the VBS,
A virtual power system emulator that simulates a real high-voltage battery, consisting of a battery for the charger and discharger, a buffer, and a BMS emulator. The method of claim 5, wherein the VCE is
A virtual power system emulator consisting of a DC load, an AC load, a DC power source, an AC power source and a VCE controller to simulate a real converter. The method of claim 5, wherein the VLE is
A virtual power system emulator consisting of a DC load and a VLE controller to simulate the low power consumption load of a real vehicle. According to claim 5, wherein the controller,
Power system structure model, vehicle model, battery specification model, specification model for each power converter, interface model for each power converter, electronic load model, electronic load power consumption calculation module for each vehicle class/model, load pattern/power value implementation model, load A virtual power system emulator that includes a star power consumption DB. According to claim 5, wherein the controller,
A virtual power system emulator that receives the initial battery value and environmental conditions, vehicle speed and vehicle environment, power system components/topology, vehicle class, vehicle model, power converter type, load type, number of loads, and power consumption by load. According to claim 5, wherein the controller,
Outputs the charge/discharge control signal and battery state value in relation to the battery, and outputs the load wattage, supply wattage, and power converter state value in relation to the power converter, and the power consumption, operation time and section, and state value in relation to the load. A virtual power system emulator that outputs 13. A method for emulating a vehicle power system using the virtual power system emulator of any one of claims 1 to 12, the method performed by a virtual power system emulator controller (VPE controller) of the virtual power system emulator,
receiving and setting elements necessary for emulation including vehicle model setting, power architecture setting, load model setting, battery initial state setting, vehicle speed & environmental condition setting;
Implementing the operation logic of the analysis target;
setting a target for analysis;
performing virtual power system emulation;
The stage of analyzing the results of the execution stage and determining whether the goal has been achieved and the appropriateness of the goal based on the analysis result
A vehicle power system emulating method comprising a. 14. The method of claim 13,
As a result of the determination of the determining step, if the target is not achieved and the target is appropriate, the method for emulating a vehicle power system is to return to the step of performing the virtual power system emulation and to re-perform the subsequent steps. 14. The method of claim 13,
As a result of the determination in the determining step, if the target is not achieved and the target is not appropriate, the method for emulating a vehicle power system is to return to the analysis target target setting step and re-perform the subsequent steps.

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