Communication protocol consistency simulation test method, test system and equipment

Abstract

The invention provides a communication protocol consistency simulation test method, test system and equipment, and belongs to the technical field of electric vehicle charging. The method is applied to a test system, and the system comprises simulation equipment such as a target standard charging pile controller, a battery management controller and a main controller, and an electric vehicle communication controller. Wherein the target standard charging pile controller sends a first signal, and the first signal comprises a first message; the electric vehicle communication controller responds to the first signal and sends a second signal, and the second signal comprises a second message; the battery management controller sends a third signal, wherein the third signal comprises a third message; the main controller determines the consistency of the communication protocol based on the second signal and the third signal. According to the application, the communication protocol of the electric vehicle communication controller can be verified in real time, powerful support is provided for safety evaluation of the electric vehicle communication controller, and the stability and consistency of the electric vehicle communication controller in practical application are improved.

Description

Technical Field

[0001] The present application relates to the field of electric vehicle charging technology, and in particular to a communication protocol consistency simulation test method, test system and equipment. Background Art

[0002] In recent years, with the vigorous development of the electric vehicle industry, domestic demand for electric vehicles has become increasingly saturated, and more and more automakers have begun to expand into overseas automotive markets to expand their market share. For example, most automakers currently export electric vehicles to Europe. However, the charging protocols used by electric vehicles in Europe differ from those used in China. This requires that electric vehicles exported to Europe be able to adapt to the charging protocols used in Europe and charge according to European charging standards. To address this issue, most automakers choose to deploy Electric Vehicle Communication Controllers (EVCCs) in exported electric vehicles to convert the national standard protocol for electric vehicles into the target standard protocol to meet market demand. Therefore, the compatibility and consistency of EVCCs will seriously affect the market for exported electric vehicles.

[0003] In related technologies, test equipment is often used to adjust relevant electrical quantities, coordinate and complete the test of data accuracy, and verify whether the electric vehicle battery management controller protocol is consistent with the target standard through test equipment.

[0004] However, although the relevant technologies can solve the charging protocol conversion problem of exported electric vehicles, the above solutions all revolve around the compatibility of the battery management controller and are unable to verify the conversion protocol of the EVCC itself. This makes it impossible to guarantee the compatibility and consistency of the EVCC used in exported electric vehicles. Summary of the Invention

[0005] The purpose of this application is to provide a communication protocol consistency simulation test method, test system and equipment, which can achieve real-time verification of the communication protocol of the electric vehicle communication controller, provide strong support for the safety assessment of the electric vehicle communication controller, and thus improve the stability and consistency of the electric vehicle communication controller in actual applications.

[0006] The embodiment of the present application is implemented as follows: In a first aspect of an embodiment of the present application, a communication protocol consistency simulation test method is provided. The method is applied to a test system, wherein the test system includes: a simulation device and an electric vehicle communication controller. The simulation device includes: a target standard charging pile controller, a battery management controller, and a main controller. The method includes: The target standard charging pile controller sends a first signal, wherein the first signal includes: a first message; the electric vehicle communication controller responds to the first signal and sends a second signal, wherein the second signal includes: a second message; The battery management controller sends a third signal, the third signal including: a third message; The main controller determines consistency of the communication protocol based on the second signal and the third signal.

[0007] As a possible implementation, the first signal includes a pulse width modulation signal, and the second signal includes an auxiliary power supply signal; the target standard charging pile controller sends the first signal; the electric vehicle communication controller responds to the first signal and sends a second signal, including: When the target standard charging pile controller starts the charging process, if it detects that the control guide signal reaches a first preset value, it sends a pulse width modulation signal to the electric vehicle communication controller; accordingly, the electric vehicle communication controller responds to the pulse width modulation signal and sends an auxiliary power signal to the battery management controller to wake up the battery management controller.

[0008] As a possible implementation, after the battery management controller sends the third signal, the communication protocol consistency simulation test method further includes: The electric vehicle communication controller feeds back a fourth signal to the target standard charging pile controller based on the third signal, where the fourth signal includes: a fourth message; The electric vehicle communication controller sends a fifth signal, the fifth signal including: a fifth message; the target standard charging pile controller responds to the fifth signal and sends the first signal; The main controller determines consistency of the communication protocol based on the third signal, the fourth signal, and the fifth signal.

[0009] As a possible implementation, the first message includes: a communication session start response message, the second message includes: a charging handshake message, and the fifth message includes: a communication session start message; the electric vehicle communication controller sends a fifth signal; the target standard charging pile controller responds to the fifth signal and sends the first signal, including: After the target standard charging pile controller and the electric vehicle communication controller complete the message interaction in the power attenuation stage, the electric vehicle communication controller sends a communication session start message to the target standard charging pile controller. The target standard charging pile controller responds to the communication session start message by sending a communication session start response message to the electric vehicle communication controller. The electric vehicle communication controller establishes a communication session with the target standard charging pile controller based on the communication session start response message and sends a charging handshake message to the battery management controller. The battery management controller communicates and shakes hands with the electric vehicle communication controller based on the charging handshake message.

[0010] As a possible implementation, the first message includes: an authorization and authentication response message, the second signal includes: a switch control signal, the third signal includes: a switch closing signal, the fourth signal includes: a control guide signal, the fifth message includes: an authorization and authentication message, the electric vehicle communication controller sends the fifth signal; the target standard charging pile controller responds to the fifth signal and sends the first signal, and also includes: After the battery management controller and the electric vehicle communication controller communicate and shake hands, the electric vehicle communication controller sends an authorization authentication message to the target standard charging pile controller. The target standard charging pile controller responds to the authorization authentication message and sends an authorization authentication response message to the electric vehicle communication controller. The electric vehicle communication controller sends a switch control signal to the battery management controller according to the authorization authentication response message. The battery management controller closes the switch in response to the switch control signal, so that the electric vehicle communication controller sends a control guidance signal to the target standard charging pile controller after receiving the switch closure signal, and the control guidance signal includes a second preset voltage value.

[0011] As a possible implementation, the first message includes: an insulation detection response message, the fifth message includes: an insulation detection request message, the electric vehicle communication controller sends a fifth signal, the target standard charging pile controller responds to the fifth signal and sends the first signal, and further includes: When the electric vehicle communication controller sends an insulation detection request message to the target standard charging pile controller, the target standard charging pile controller continuously sends insulation detection response messages to the electric vehicle communication controller, and the electric vehicle communication controller responds to the insulation detection response message to perform insulation detection interaction with the electric vehicle communication controller.

[0012] As a possible implementation, the first message includes: a pre-charging response message, the third message includes: a first charging status message and a second charging status message, the fourth message includes: a pre-charging preparation completion message, the fifth message includes: a pre-charging request message, the electric vehicle communication controller sends a fifth signal, the target standard charging pile controller responds to the fifth signal and sends the first signal, and also includes: When the electric vehicle communication controller sends a pre-charging request message to the target standard charging pile controller, the battery management controller sends a first charging status message to the electric vehicle communication controller. After a preset period of time, the battery management controller sends a second charging status message to the electric vehicle communication controller. The electric vehicle communication controller sends a pre-charging preparation completion message to the target standard charging pile controller based on the second charging status message. The target standard charging pile controller sends a pre-charging response message to the electric vehicle communication controller based on the pre-charging preparation completion message. The target standard charging pile controller interacts with the electric vehicle communication controller on the target standard charging process based on the pre-charging preparation completion message.

[0013] As a possible implementation, the second message includes: a charging demand request message, when the pre-charge voltage indicated by the pre-charge response message is less than the requested voltage indicated by the pre-charge request message, the battery management controller receives the charging demand request message sent by the electric vehicle communication controller; The battery management controller interacts with the electric vehicle communication controller to perform the national standard charging process based on the charging demand request message.

[0014] A second aspect of an embodiment of the present application provides a test system, comprising: a simulation device and an electric vehicle communication controller, the simulation device comprising: a target standard charging pile controller, a first communication module, a battery management controller, a second communication module, and a main controller, the target standard charging pile controller being connected to the electric vehicle communication controller via the first communication module, the battery management controller being connected to the electric vehicle communication controller via the second communication module, and the main controller being connected to the first communication module and the second communication module; The simulation device is used to execute the steps of the communication protocol consistency simulation test method described in the first aspect above.

[0015] A third aspect of the embodiments of the present application provides a test device in which the test system described in the second aspect is deployed.

[0016] The beneficial effects of the embodiments of the present application include: An embodiment of the present application provides a communication protocol consistency simulation test method that uses a test system to verify the communication protocol consistency of an electric vehicle communication controller in real time. The test system includes a simulation device and an electric vehicle communication controller. The simulation device includes a target standard charging pile controller, a battery management controller, and a main controller. The target standard charging pile controller is configured to simulate the standard charging protocol of the target exporting country by sending a first signal. The electric vehicle communication controller responds to the first signal and sends a second signal. The battery management controller sends a third signal. The main controller verifies, based on the second and third signals collected in real time, whether the electric vehicle communication controller can convert the first signal under the target exporting country's standard charging protocol into a second signal under the national standard charging protocol, thereby determining the communication protocol consistency of the electric vehicle communication controller. Furthermore, the test system is a simulation tool built in an experimental environment that not only simulates the target exporting country's standard charging pile but also simulates the national standard electric vehicle battery management system. It verifies the consistency of the charging process, message exchange, timing, and other communication processes between the national standard battery management system and the target exporting country's standard charging pile in real time, thereby reducing the difficulty and cost of communication protocol testing for the electric vehicle communication controller. In this way, the communication protocol of the electric vehicle communication controller can be verified in real time, providing strong support for the safety assessment of the electric vehicle communication controller, thereby improving the stability and consistency of the electric vehicle communication controller in practical applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of the structure of a test system provided in an embodiment of the present application; Figure 2 A flowchart of a first communication protocol consistency simulation test method provided in an embodiment of the present application; Figure 3 A message transmission flow chart of a test system provided in an embodiment of the present application; Figure 4 A flowchart of a second communication protocol consistency simulation test method provided in an embodiment of the present application; Figure 5 A flowchart of a third communication protocol consistency simulation test method provided in an embodiment of the present application; Figure 6A message transmission flow chart of another test system provided in an embodiment of the present application; Figure 7 A flowchart of a fourth communication protocol consistency simulation test method provided in an embodiment of the present application; Figure 8 A flowchart of a fifth communication protocol consistency simulation test method provided in an embodiment of the present application; Figure 9 A flowchart of a sixth communication protocol consistency simulation test method provided in an embodiment of the present application; Figure 10 A flowchart of a seventh communication protocol consistency simulation test method provided in an embodiment of the present application; Figure 11 A schematic diagram of the structure of a test device provided in an embodiment of the present application.

[0019] Figure numerals: 10: test system; 101: simulation device; 1011: target standard charging pile controller; 1012: first communication module; 1013: battery management controller; 1014: second communication module; 1015: main controller; 102: electric vehicle communication controller; 20: test device. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0023] In the description of this application, it should be noted that the terms "first", "second", "third", "fourth", "fifth", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0024] With the rapid development of the electric vehicle industry, domestic demand for electric vehicles has reached saturation. Consequently, a growing number of automakers are expanding into overseas markets, aiming to export domestically produced electric vehicles to other countries. However, because the charging protocols used by electric vehicles in other countries differ from those used by domestically produced electric vehicles, these vehicles must adapt to the exporting country's charging protocols. To ensure that domestically produced electric vehicles exported to other countries can adapt to these protocols, most manufacturers choose to deploy electric vehicle communication controllers (EVCCs) in their domestically produced electric vehicles to convert the national standard charging protocol to the exporting country's standard. Therefore, the communication consistency and compatibility of EVCCs are closely linked to the size of the overseas market for domestically produced electric vehicles.

[0025] Currently, there are two common ways to verify EVCC communication consistency. The first is to use test instruments to adjust relevant electrical quantities, coordinate and complete data accuracy testing, and verify through test equipment whether the charging protocol of the electric vehicle battery management controller is consistent with the standard charging protocol of the exporting country. The second is that the electric vehicle directly uses the national standard charging protocol to communicate with the EVCC, and the EVCC pre-charges the exporting country's charging pile based on the BRM message corresponding to the national standard charging protocol. However, although this solution can verify the charging protocol conversion problem of electric vehicles, the above solutions are all centered around the compatibility of the battery management controller in the electric vehicle and cannot verify the conversion protocol of the EVCC application. This makes it impossible to guarantee the consistency of the EVCC charging protocol conversion applied to exported electric vehicles.

[0026] To this end, an embodiment of the present application provides a communication protocol consistency simulation test method. By testing the communication protocol conversion consistency of the electric vehicle communication controller through the test system, the communication protocol of the electric vehicle communication controller can be verified in real time, providing strong support for the safety assessment of the electric vehicle communication controller, thereby improving the stability and consistency of the electric vehicle communication controller in actual applications.

[0027] The communication protocol consistency simulation test method and test system provided in the embodiments of the present application are explained in detail below with reference to the accompanying drawings.

[0028] Figure 1 A schematic diagram of the structure of a test system provided in this application, see Figure 1The test system 10 provided in the embodiment of the present application includes: a simulation device 101 and an electric vehicle communication controller 102. The simulation device 101 includes: a target standard charging pile controller 1011, a first communication module 1012, a battery management controller 1013, a second communication module 1014, and a main controller 1015. The target standard charging pile controller 1011 is connected to the electric vehicle communication controller 102 via the first communication module 1012, the battery management controller 1013 is connected to the electric vehicle communication controller 102 via the second communication module 1014, and the main controller 1015 is connected to the first communication module 1012 and the second communication module 1014 respectively.

[0029] Optionally, the target standard charging pile controller 1011 has the standard charging protocol of the target exporting country integrated inside. The target standard charging pile can be a European standard charging pile or a standard charging pile of other countries. This application takes the European standard charging pile as an example, but it does not mean that the simulation device 101 provided in the embodiment of this application can only verify the consistency of the communication protocol conversion between the European standard charging pile and the national standard electric vehicle by the electric vehicle communication controller 102. This application does not make specific limitations on this.

[0030] Optionally, the battery management controller 1013 refers to the battery management controller in a domestic electric vehicle, and the battery management controller 1013 integrates the country's standard charging protocol, that is, the battery management controller 1013 operates according to the country's standard charging protocol, and the target standard charging pile controller 1011 operates according to the standard charging protocol of the target exporting country.

[0031] It is worth noting that the target standard charging pile controller 1011 and the battery management controller 1013 are both analog controllers. The target standard charging pile controller 1011 is used to simulate the standard charging pile controller of the target exporting country, and the battery management controller 1013 is used to simulate the standard battery management controller of domestic electric vehicles. This can reduce the cost of the communication protocol consistency test of the electric vehicle communication controller 102 and improve the efficiency of the communication protocol consistency test of the electric vehicle communication controller 102.

[0032] Furthermore, since there are no real charging gun cables and national standard charging sockets of the target standard charging pile in the test system 10, all signal cables in the test system 10 can be connected through external terminals.

[0033] Optionally, the first communication module 1012 is primarily used to transmit signals sent by the target standard charging pile controller 1011 in accordance with the standard charging protocol of the target exporting country to the electric vehicle communication controller 102. The electric vehicle communication controller 102 is responsible for converting the signals sent by the target standard charging pile controller 1011 into signals readable by the battery management controller 1013 of the domestic electric vehicle, and transmitting them to the battery management controller 1013 via the second communication module 1014. Furthermore, the battery management controller 1013 may also proactively send signals to the electric vehicle communication controller 102 via the second communication module 1014. The electric vehicle communication controller 102 converts the signals into signals readable by the target standard charging pile controller 1011 and transmits them to the target standard charging pile controller 1011 via the first communication module 1012. Thus, both the first communication module 1012 and the second communication module 1014 are bidirectional communication modules.

[0034] Optionally, the first communication module 1012 matches the signal transmission characteristics of the target standard charging pile controller 1011. For example, if the signals sent and received by the target standard charging pile controller 1011 are both power carrier signals, the first communication module 1012 is often a power carrier transmission channel. Similarly, the second communication module 1014 matches the signal transmission characteristics of the battery management controller 1013. For example, if the signals sent and received by the battery management controller 1013 are often bus signals, the second communication module 1014 is often a bus transmission channel. Specifically, the first communication module 1012 can utilize PLC power carrier communication technology to establish communication between the simulation device 101 and the electric vehicle communication controller 102, thereby implementing software message interaction functions of the target standard charging pile controller 1011, on / off control of the CP signal line and the PP signal line, and adjustment and acquisition of the amplitude, frequency, and duty cycle of the pulse width modulation signal PWM.

[0035] Furthermore, the electric vehicle communication controller 102 is used to convert the power carrier signal sent by the target standard charging pile controller 1011 based on the standard charging protocol of the target exporting country into a bus signal recognizable by the battery management controller 1013 of the domestic electric vehicle; the electric vehicle communication controller 102 can also be used to convert the bus signal sent by the battery management controller 1013 in accordance with the national standard charging protocol into a power carrier signal readable by the target standard charging pile controller 1011, and this application does not make specific restrictions on this.

[0036] Optionally, the electric vehicle communication controller 102 is connected to the first communication module 1012 via a CP signal line and a PP signal line, wherein the CP signal line is used to transmit a pulse width modulation signal, and the PP signal line is used to transmit a connection status.

[0037] Furthermore, the CP signal and the PP signal serve as key signals for safe communication and charging process control between the target standard charging pile and the electric vehicle. The CP signal is used to establish a communication link between the target standard charging pile and the electric vehicle, monitor the connection status and control the start and stop of charging; the PP signal is used to monitor the physical connection status between the charging gun of the target standard charging pile and the electric vehicle, and identify the rated current capacity of the charging cable, which can effectively prevent overcurrent.

[0038] In addition, the electric vehicle communication controller 102 and the second communication module 1014 are connected via a CAN signal line. The CAN signal line is used to realize two-way data exchange between the battery management system and the target standard charging pile, which can achieve precise charging control, safety monitoring and intelligent management. Furthermore, the second communication module 1014 can use CAN communication technology to realize message exchange between the national standard battery management controller 1013 and the electric vehicle communication controller 102, as well as the on-off control of the bus signals CAN and CAN-.

[0039] It can be seen that the electric vehicle communication controller 102 is used to realize two-way data interaction between the battery management controller 1013 in the domestic electric vehicle and the target standard charging pile controller 1011 of the target export country. The communication protocol conversion capability of the electric vehicle communication controller 102 will seriously affect the market structure of domestic electric vehicles in the target export country.

[0040] It is worth noting that the simulation device 101 in the test system 10 provided in the embodiment of the present application is a simulation controller built in an experimental environment, which can complete the standard charging guidance loop simulation of the standard charging pile of the target export country and the guidance loop simulation of the battery management system of the domestic electric vehicle. It can also support functions such as charging process monitoring, message interaction and timing modification, providing data support for the safety performance evaluation of the electric vehicle communication controller 102, thereby improving the stability of the electric vehicle communication controller 102 in actual applications.

[0041] Figure 2 This is a flow chart of a communication protocol consistency simulation test method provided by the present application, which is applied to the above-mentioned test system 10, and includes: S201. The target standard charging pile controller sends a first signal, wherein the first signal includes: a first message; the electric vehicle communication controller responds to the first signal and sends a second signal, wherein the second signal includes: a second message.

[0042] Optionally, the target standard charging pile controller has complete simulation functions of the standard charging pile of the target exporting country. For example, the target standard charging pile controller can meet the German national charging standard (DIN 70121:2014, referred to as DIN) and the charging standard formulated by the International Organization for Standardization (ISO 15118, referred to as ISO), and can perform operation control in sequence according to multiple stage processes such as the signal level attenuation stage (Signal Level Attenuation Characterization, referred to as SLAC), the charging session discovery and negotiation stage (Session and Discovery Phase, referred to as SDP), and the application layer communication stage (Vehicle-to-Grid, referred to as V2G). It can also edit parameters such as message sending enable, delay, cycle, signal filling, etc., and can also simulate the normal operating conditions or abnormal operating conditions of the standard charging pile of the target exporting country. This application does not make specific limitations on this.

[0043] Among them, the control guidance simulation of the target standard charging pile controller includes: RC resistance, PE broken pin, CP short circuit, CP open circuit, PWM signal regulation and other operations, which are not specifically limited in this application.

[0044] Optionally, the first signal is a signal sent by the target standard charging pile controller to the electric vehicle communication controller. The first signal can be a signal actively sent by the target standard charging pile controller to the electric vehicle communication controller, or a signal sent by the target standard charging pile controller to the electric vehicle communication controller in response to a request initiated by the electric vehicle communication controller. This application does not make any specific restrictions on this.

[0045] Optionally, the first signal can be a power carrier signal, such as a CP signal, a PP signal, etc.; it can also be a communication message, such as a communication session start message, an authorization authentication message, etc. This application does not make specific limitations on this.

[0046] Optionally, the second signal is a signal generated by the electric vehicle communication controller under the action of the first signal. The second signal can be a signal sent by the electric vehicle communication controller to the battery management controller, such as an auxiliary power supply signal, a charging handshake message, etc.; it can also be a signal sent by the electric vehicle communication controller to the target standard charging pile controller, such as a charging demand request message, etc. This application does not make specific limitations on this.

[0047] Optionally, the second signal may be either a CAN communication message or a PLC signal, which is not specifically limited in this application.

[0048] S202: The battery management controller sends a third signal, where the third signal includes a third message.

[0049] In electric vehicles, the Battery Management System (BMS) is a key component to ensure the safe, reliable and efficient operation of battery components in electric vehicles.

[0050] Optionally, the battery management controller in the battery management system and the electric vehicle communication controller communicate and exchange data through the following six phases: physical connection completion, low-voltage auxiliary power-up, charging handshake phase, charging parameter configuration phase, charging phase, and charging end phase. The battery management controller can edit parameters such as message transmission enable, delay, cycle, signal padding, etc. at each stage, but this application does not specifically limit this.

[0051] Optionally, the third signal is a signal sent by the battery management controller to the electric vehicle communication controller. The third signal can be a signal fed back by the battery management controller in response to the second signal sent by the electric vehicle communication controller, such as a switch closing signal; or it can be a signal actively sent by the battery management controller to the electric vehicle communication controller, such as a first charging status message, a second charging status message, etc. This application does not make any specific restrictions on this.

[0052] It is worth noting that no matter whether the battery management controller actively or passively responds to sending the third signal to the electric vehicle communication controller, the third signal is a CAN communication signal.

[0053] S203: The main controller determines the consistency of the communication protocol based on the second signal and the third signal.

[0054] Optionally, the main controller collects the second signal and the third signal via the second communication module. The main controller can determine whether the electric vehicle communication controller correctly responds to the first signal sent by the target standard charging pile controller based on the second signal and the third signal.

[0055] Optionally, the consistency of the communication protocol refers to the consistency of the electric vehicle communication controller in converting between the standard charging protocol of the target exporting country and the national standard charging protocol. If the electric vehicle communication controller cannot accurately convert the first signal emitted by the target standard charging pile controller into the second signal, it is determined that the communication protocol of the electric vehicle communication controller is inconsistent.

[0056] In an embodiment of the present application, a test system is used to verify the communication protocol consistency of an electric vehicle communication controller in real time. The test system includes a simulation device and an electric vehicle communication controller. The simulation device includes a target standard charging pile controller, a battery management controller, and a main controller. The target standard charging pile controller is used to simulate the standard charging protocol of the target exporting country and send a first signal. The electric vehicle communication controller responds to the first signal and sends a second signal. The battery management controller sends a third signal. The main controller verifies whether the electric vehicle communication controller can convert the first signal under the target exporting country's standard charging protocol into a second signal under the national standard charging protocol based on the second and third signals collected in real time, thereby determining the communication protocol consistency of the electric vehicle communication controller. Furthermore, the test system is a simulation tool built in an experimental environment. It not only has the function of simulating the standard charging pile of the target exporting country, but also has the function of simulating the battery management system of the national standard electric vehicle. It verifies the consistency of the charging process, message exchange, timing, and other communication processes between the national standard battery management system and the standard charging pile of the target exporting country in real time, reducing the difficulty and cost of testing the communication protocol of the electric vehicle communication controller. In this way, the communication protocol of the electric vehicle communication controller can be verified in real time, providing strong support for the safety assessment of the electric vehicle communication controller, thereby improving the stability and consistency of the electric vehicle communication controller in practical applications.

[0057] In an optional embodiment, see Figure 3 In the test system 10 provided in the embodiment of the present application, the target standard charging pile controller sends a first signal to the electric vehicle communication controller, and the electric vehicle communication controller responds to the first signal to send a second signal to the battery management controller. The battery management controller can send a third signal to the electric vehicle communication controller under the action of the second signal, or it can actively send the third signal to the electric vehicle communication controller. This application does not make specific limitations on this.

[0058] In an optional embodiment, the first signal includes a pulse width modulation signal, and the second signal includes an auxiliary power supply signal. Figure 4 The operation of step S201 may specifically be: Among them, after the simulation device establishes a connection with the electric vehicle communication controller, the target standard charging pile controller starts the charging process and enters the working state.

[0059] When the target standard charging pile controller starts the charging process, if it detects that the control guide signal reaches a first preset value, it sends a pulse width modulation signal to the electric vehicle communication controller; accordingly, the electric vehicle communication controller responds to the pulse width modulation signal and sends an auxiliary power signal to the battery management controller to wake up the battery management controller.

[0060] Optionally, when the target standard charging pile controller detects that the control pilot signal (CP signal) of the control pilot loop is equal to a first preset value, it determines that the physical connection between the simulation device and the electric vehicle communication controller is normal, and the target standard charging pile controller starts to send a pulse width modulation signal to the electric vehicle communication controller to realize digital communication between the target standard charging pile controller and the electric vehicle communication controller.

[0061] Optionally, the target standard charging pile controller sends a control guidance signal via a control guidance loop and adjusts the control guidance signal via an internal resistor divider in the charging pile. The target standard charging pile controller detects the control guidance signal from the control guidance loop in the charging pile in real time. The first preset value is a user-preset charging connection threshold, which is 9V.

[0062] It is worth noting that when the CP voltage is 12V, it indicates that the target standard charging pile controller is ready for charging, but has not yet established a connection with the electric vehicle. When the CP voltage is 9V, it indicates that the target standard charging pile is properly connected to the electric vehicle, but charging has not yet begun. When the CP voltage reaches 6V, it indicates that the electric vehicle is ready and requests the charging pile to charge the electric vehicle. The voltage error of the CP voltage can be within ±0.6V, which is not specifically limited in this application.

[0063] Optionally, the target standard charging pile controller sends a pulse width modulation signal (PWM) to the electric vehicle communication controller via the CP signal line to inform the battery management controller of the maximum charging current that the target standard charging pile controller can currently provide. The PWM signal includes amplitude, duty cycle, and frequency. The PWM signal can be a pulse width modulation signal with a duty cycle of 5% and a frequency of 1 kHz, which is not specifically limited in this application.

[0064] Optionally, after receiving the pulse width modulation signal sent by the target standard charging pile controller, the electric vehicle communication controller sends a power auxiliary signal A to the battery management controller in response to the pulse width modulation signal to wake up the battery management controller. The battery management controller only starts operating when the electric vehicle communication controller correctly responds to the pulse width modulation signal and sends the power auxiliary signal A to the battery management controller.

[0065] It is worth noting that the auxiliary power signal is a low-voltage DC power signal provided by the electric vehicle communication controller to the battery management controller based on the pulse width modulation signal. It is mainly used to wake up the battery management controller, maintain power supply to the communication circuit, and ensure high-voltage charging safety.

[0066] Optionally, if the electric vehicle communication controller cannot send auxiliary power signal A to the battery management controller to wake up the battery management controller under the action of the pulse width modulation signal sent by the target standard charging pile, it means that the electric vehicle communication controller cannot complete the protocol conversion of charging start wake-up, and the communication protocol conversion of the electric vehicle communication controller is not consistent.

[0067] In an optional embodiment, see Figure 5 After step S203, the communication protocol consistency simulation test method further includes: S204. The electric vehicle communication controller feeds back a fourth signal to the target standard charging pile controller based on the third signal. The fourth signal includes: a fourth message.

[0068] Optionally, the electric vehicle communication controller responds to the third signal and feeds back a fourth signal to the target standard charging pile controller. The fourth signal is a PLC signal generated by the electric vehicle communication controller in response to the third signal. The fourth signal can be a control guide signal, a pre-charging preparation completion message, etc. This application does not make specific limitations on this.

[0069] S205. The electric vehicle communication controller sends a fifth signal, which includes a fifth message. The target standard charging pile controller responds to the fifth signal and sends the first signal.

[0070] Optionally, the electric vehicle communication controller actively sends a fifth signal to the target standard charging pile controller. The fifth signal is a power carrier signal. The fifth signal can be an insulation detection request message, a pre-charging request message, etc. This application does not make specific limitations on this.

[0071] Optionally, the target standard charging pile controller responds to the fifth signal and feeds back the first signal to the electric vehicle communication controller, and the electric vehicle communication controller continues to send the second signal in response to the first signal.

[0072] S206: The main controller determines consistency of the communication protocol based on the third signal, the fourth signal, and the fifth signal.

[0073] Optionally, the main controller collects the third signal via the second communication module, and collects the fourth signal and the fourth signal via the first communication module. The main controller can determine whether the electric vehicle communication controller correctly responds to the third signal sent by the battery management controller and whether the electric vehicle communication controller correctly sends the fifth signal based on the third signal, the fourth signal and the fifth signal.

[0074] Alternatively, if the electric vehicle communication controller cannot accurately convert the third signal sent by the battery management controller into the fourth signal, it is determined that the communication protocol of the electric vehicle communication controller is inconsistent. At the same time, if the electric vehicle communication controller cannot correctly send the fifth signal, it can be determined that the communication protocol of the electric vehicle communication controller is inconsistent.

[0075] In an optional embodiment, see Figure 6 In the test system 10 provided in the embodiment of the present application, the target standard charging pile controller sends a first signal to the electric vehicle communication controller, the electric vehicle communication controller responds to the first signal to send a second signal to the battery management controller, and after the battery management controller sends a third signal to the electric vehicle communication controller under the action of the second signal, the electric vehicle communication controller sends a fourth signal to the target standard charging pile controller under the action of the third signal; in addition, the electric vehicle communication controller can also actively send a fifth signal to the target standard charging pile controller, the target standard charging pile controller responds to the fifth signal and sends a first signal to the electric vehicle communication controller, and the electric vehicle communication controller responds to the first signal and sends a second signal to the battery management controller, and so on.

[0076] In an optional embodiment, the first message includes: a communication message for starting a communication session, the second message includes: a charging handshake message, and the fifth message includes: a communication message for starting a communication session, see Figure 7 The operation of step S205 may also be specifically as follows: Optionally, the SessionSetupReq message is the first application layer protocol message sent by the target standard charging pile controller to establish a communication session with the electric vehicle. This message is a key handshake signal, primarily used to lay the foundation for subsequent charging service negotiations. The core function of the SessionSetupReq message is to assign a session identifier to the current charging session.

[0077] Optionally, the communication startup response message (SessionSetupRes message) is a response message of the target standard charging pile controller in response to the communication connection initiated by the electric vehicle communication controller.

[0078] Optionally, the charging handshake message (CHM message) is a handshake request message sent by the electric vehicle communication controller to the battery management controller after establishing communication with the target standard charging pile controller to inform the battery management controller of the charging configuration parameters that the target charging pile controller can provide.

[0079] After the target standard charging pile controller and the electric vehicle communication controller complete the message interaction in the power attenuation stage, the electric vehicle communication controller sends a communication session start message to the target standard charging pile controller. The target standard charging pile controller responds to the communication session start message by sending a communication session start response message to the electric vehicle communication controller. The electric vehicle communication controller establishes a communication session with the target standard charging pile controller based on the communication session start response message and sends a charging handshake message to the battery management controller. The battery management controller communicates and shakes hands with the electric vehicle communication controller based on the charging handshake message.

[0080] Among them, the power attenuation stage refers to the stage when the battery of the electric vehicle is about to reach a fully charged state and the target standard charging pile controller actively reduces the charging power.

[0081] Optionally, after the target standard charging pile controller and the electric vehicle communication controller complete the message interaction in the power attenuation stage, and a charging logic network is established between the simulation device and the electric vehicle communication controller, the electric vehicle communication controller sends a SessionSetupReq message to the target standard charging pile controller, and the target standard charging pile controller responds to the SessionSetupReq message and sends a SessionSetupRes message to the electric vehicle communication controller. The electric vehicle communication controller establishes a communication session with the target standard charging pile controller based on the SessionSetupRes message. At the same time, the electric vehicle communication controller responds to the SessionSetupRes message and sends a CHM message to the battery management controller. The battery management controller performs a communication handshake with the electric vehicle communication controller based on the CHM message.

[0082] Optionally, if the electric vehicle communication controller cannot accurately establish a communication session with the target standard charging pile under the action of the start communication session response message sent by the target standard charging pile, and at the same time, perform a communication handshake with the battery management controller, it means that the electric vehicle communication controller cannot complete the protocol conversion of the charging start session, and the communication protocol conversion of the electric vehicle communication controller is not consistent.

[0083] In an optional embodiment, the first message includes: an authorization and authentication response message, the second signal includes: a switch control signal, the third signal includes: a switch closing signal, the fourth signal includes: a control guidance signal, and the fifth message includes: an authorization and authentication message, see Figure 8 The operation of step S205 may also be specifically as follows: Optionally, the ContractAuthentioncationReq message refers to a two-way digital identity authentication or payment agreement signing before the target standard charging pile and the electric vehicle charge. The ContractAuthentioncationRes message refers to a response message indicating that the two-way digital identity authentication between the target standard charging pile and the electric vehicle has passed.

[0084] Optionally, the switch control signal refers to a control signal for controlling the S2 switch in the electric vehicle, the switch closing signal is used to reflect the closing state of the S2 switch in the electric vehicle, and the control guide signal refers to the CP voltage transmitted by the CP signal line adjusted by the electric vehicle communication controller.

[0085] Among them, the S2 switch is the charging connection confirmation switch of the electric vehicle. Its core function is to monitor the physical connection status between the charging gun of the charging pile and the charging socket of the electric vehicle in real time through a combination of mechanical triggering and electrical feedback.

[0086] After the battery management controller and the electric vehicle communication controller communicate and shake hands, the electric vehicle communication controller sends an authorization authentication message to the target standard charging pile controller, and the target standard charging pile controller responds to the authorization authentication message and sends an authorization authentication response message to the electric vehicle communication controller; the electric vehicle communication controller sends a switch control signal to the battery management controller according to the authorization authentication response message; the battery management controller closes the switch in response to the switch control signal, so that after the electric vehicle communication controller receives the switch closure signal, it sends a control guide signal to the target standard charging pile controller, and the control guide signal includes a second preset voltage value.

[0087] Optionally, after the battery management controller and the electric vehicle communication controller perform a communication handshake, the electric vehicle communication controller sends a ContractAuthentioncationReq message to the target standard charging pile controller to verify the identity of the electric vehicle and the target charging pile. The target standard charging pile controller responds to the ContractAuthentioncationReq message and sends a ContractAuthentioncationRes message to the electric vehicle communication controller. After the electric vehicle communication controller is authorized, the electric vehicle communication controller sends a switch closure control signal to the battery management controller based on the ContractAuthentioncationRes message. The battery management controller controls the S2 switch inside the electric vehicle to close based on the switch closure control signal. After the switch S2 is closed, the electric vehicle communication controller determines that the electric vehicle is allowed to charge. The electric vehicle communication controller lowers the CP voltage of the CP signal line to 6V to inform the target standard charging pile controller that the electric vehicle is currently ready for charging. The second preset voltage value is a CP voltage value preset by the user and is used to inform the target standard charging pile controller that the electric vehicle is currently ready for charging. The second preset voltage value can be 6V, which is not specifically limited in this application.

[0088] Optionally, if the electric vehicle communication controller cannot accurately authorize the authentication, correctly control the S2 switch to close, and adjust the CP voltage of the CP signal line, it is determined that the communication protocol of the electric vehicle communication controller is inconsistent.

[0089] In an optional embodiment, the first message includes: an insulation detection response message, and the fifth message includes: an insulation detection request message, see Figure 9 The operation of step S205 may also be specifically as follows: Optionally, the insulation detection request message (CableCheckReq message) refers to a message sent by the electric vehicle communication controller requesting insulation detection; the insulation detection response message (CableCheckRes message) refers to a response message from the target standard charging pile controller allowing the electric vehicle communication controller and the battery management controller to perform insulation detection.

[0090] Insulation testing involves measuring the insulation resistance between the high-voltage electrical system and the vehicle body using specific methods to assess whether the insulation meets safety standards. In electric vehicles, insulation testing is a crucial step in preventing electrical faults such as leakage and short circuits in the high-voltage system.

[0091] When the electric vehicle communication controller sends an insulation detection request message to the target standard charging pile controller, the target standard charging pile controller continuously sends insulation detection response messages to the electric vehicle communication controller, and the electric vehicle communication controller responds to the insulation detection response message to perform insulation detection interaction with the electric vehicle communication controller.

[0092] Optionally, the electric vehicle communication controller actively sends a CableCheckReq message to the target standard charging pile controller to request insulation testing of the electric vehicle. The target standard charging pile controller continuously replies with CableCheckRes messages. Under the action of the message, the electric vehicle communication controller interacts with the battery management controller for insulation testing communication until the insulation testing is completed.

[0093] Optionally, if the electric vehicle communication controller cannot accurately initiate an insulation detection request to the target standard charging pile controller, it is determined that the communication protocol of the electric vehicle communication controller is inconsistent.

[0094] In an optional embodiment, the first message includes: a pre-charge response message, the second message includes: a charging demand request message, the third message includes: a first charging status message and a second charging status message, the fourth message includes: a pre-charge preparation completion message, and the fifth message includes: a pre-charge request message, see Figure 10 The operation of step S205 may also be specifically as follows: Optionally, the pre-charge response message (PreChargeRes message) is a response message sent by the target standard charging pile controller to feedback the pre-charging completion status. The pre-charge response message contains the pre-charging voltage provided by the target standard charging pile controller; the charging demand request message (CurrentDemandReq message) refers to the charging demand request message generated by the electric vehicle communication controller according to the operating status of the battery management controller. The charging demand request message is used to request the target standard charging pile controller to set its charging current, thereby ensuring charging safety; the BRO message is a communication message sent by the battery management controller to the electric vehicle communication device to inform the target charging pile that the electric vehicle is ready for charging, wherein the first The first charging status message (BRO=0x00 message) is used to indicate that the electric vehicle has not completed the self-test or initialization process before charging, or that the electric vehicle cannot currently enter the charging process safely; the second charging status message (BRO=0xAA) is used to indicate that the electric vehicle is ready for charging and the target charging pile can continue with the subsequent charging process; the pre-charging preparation completion message refers to a preparation completion signal that the electric vehicle communication controller feeds back to the target standard charging pile controller after the battery management controller has made pre-charging preparations; the pre-charging request message (PreChargeReq message) is a message that initiates a pre-charging request from the electric vehicle communication controller to the target standard charging pile controller. The pre-charging request message includes the requested voltage required for charging the electric vehicle.

[0095] When the electric vehicle communication controller sends a pre-charging request message to the target standard charging pile controller, the battery management controller sends a first charging status message to the electric vehicle communication controller. After a preset period of time, the battery management controller sends a second charging status message to the electric vehicle communication controller. The electric vehicle communication controller sends a pre-charging preparation completion message to the target standard charging pile controller according to the second charging status message. The target standard charging pile controller sends a pre-charging response message to the electric vehicle communication controller according to the pre-charging preparation completion message. The target standard charging pile controller interacts with the electric vehicle communication controller in the target standard charging process according to the pre-charging preparation completion message; when the pre-charging voltage indicated by the pre-charging response message is less than the request voltage indicated by the pre-charging request message, the battery management controller receives the charging demand request message sent by the electric vehicle communication controller; the battery management controller interacts with the electric vehicle communication controller in the national standard charging process according to the charging demand request message.

[0096] Optionally, the electric vehicle communication controller requests the target standard charging pile controller to perform precharging. The electric vehicle communication controller continuously sends PreChargeReq messages to the target standard charging pile controller. At the same time, the battery management controller continuously sends BRO=0x00 messages to the electric vehicle communication controller. After a preset duration, the battery management controller sends a BRO=0xAA message to the electric vehicle communication controller. After the battery management controller is ready and the precharge voltage filled in the PreChargeRes message received from the target standard charging pile controller is less than the requested voltage, the electric vehicle communication controller sends a CurrentDemandReq message to the target standard charging pile controller. The target standard charging pile controller and the electric vehicle communication controller exchange target standard charging process messages, and the electric vehicle communication controller and the battery management controller exchange national standard charging process messages. Among them, the precharge voltage filled in the message replied by the target standard charging pile controller can be 1V~20V less than the requested voltage indicated in the precharge request message, and this application does not make specific restrictions on this.

[0097] It is worth noting that during the charging process, the voltage and current signals filled in the charging messages sent by the target standard charging pile controller and the national standard battery management controller can be set, such as 400V, 30A, etc. This application does not make specific restrictions on this.

[0098] Among them, the preset time length is the waiting time length set in advance by the user. The preset time length can be 3 seconds, 5 seconds, etc., and this application does not make specific restrictions on this.

[0099] In an optional implementation, the target standard charging pile controller can set CP and PP disconnections before and during charging, and adjust the amplitude, frequency, and duty cycle of the PWM signal to test whether the electric vehicle communication controller can charge normally. At the same time, the target standard charging pile controller can modify the sending timing, sending cycle, sending content, and whether to send all charging pile messages. For example, after receiving the CableCheckReq message sent by the electric vehicle communication controller, the target standard charging pile controller is set not to reply to the message to test whether the electric vehicle communication controller enters the shutdown process within the preset time; it can also be set to reply to the CableCheckReq message normally, set the reply cycle to 2ms, but fill in the reply message content with errors to test whether the electric vehicle communication controller shuts down normally.

[0100] In an optional implementation, the battery management controller can set CAN disconnection or short circuit, CAN-disconnection or short circuit before and during charging to test whether the electric vehicle communication controller will execute the shutdown process. At the same time, the battery management controller can modify the sending cycle, sending content, enablement, and sending timing of all battery management messages. For example, after receiving the CRM=0xAA message sent by the electric vehicle communication controller, the battery management controller can be set not to reply to the BCP message or wait for a preset time before replying to the BCP message. It can also set the maximum allowable charging current, maximum allowable total charging voltage and other electrical parameters filled in the BCP message, and can continue to send the BHM message in the handshake phase, or send the BCL message in the charging phase in advance, etc., to test the communication protocol consistency of the electric vehicle communication controller.

[0101] Figure 11 A schematic diagram of the structure of a test device provided in this application, see Figure 11 The test device 20 provided in the embodiment of the present application is deployed with the above-mentioned test system 10. The charging test device 20 implements the steps of the communication protocol consistency simulation test method through the test system 10. The specific implementation process is consistent with the above-mentioned embodiment, and this application will not go into details here.

[0102] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

[0103] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A communication protocol consistency simulation test method, characterized in that: The method is applied to a test system, the test system including: a simulation device and an electric vehicle communication controller, the simulation device including: a target standard charging pile controller, a battery management controller and a main controller, the method including: The target standard charging pile controller sends a first signal, wherein the first signal includes: a first message; the electric vehicle communication controller responds to the first signal and sends a second signal, wherein the second signal includes: a second message; The battery management controller sends a third signal, wherein the third signal includes: a third message; The main controller determines consistency of the communication protocol based on the second signal and the third signal.

2. The communication protocol consistency simulation test method according to claim 1, characterized in that: The first signal includes a pulse width modulation signal, and the second signal includes an auxiliary power signal; the target standard charging pile controller sends the first signal; the electric vehicle communication controller responds to the first signal and sends a second signal, including: When the target standard charging pile controller starts the charging process, if it is detected that the control guide signal reaches a first preset value, a pulse width modulation signal is sent to the electric vehicle communication controller; accordingly, the electric vehicle communication controller responds to the pulse width modulation signal and sends an auxiliary power signal to the battery management controller to wake up the battery management controller.

3. The communication protocol consistency simulation test method according to claim 1, characterized in that: After the battery management controller sends the third signal, the battery management controller further includes: The electric vehicle communication controller feeds back a fourth signal to the target standard charging pile controller according to the third signal, wherein the fourth signal includes: a fourth message; The electric vehicle communication controller sends a fifth signal, the fifth signal including: a fifth message; the target standard charging pile controller responds to the fifth signal and sends a first signal; The main controller determines consistency of a communication protocol based on the third signal, the fourth signal, and the fifth signal.

4. The communication protocol consistency simulation test method according to claim 3, characterized in that: The first message includes: a communication session start response message, the second message includes: a charging handshake message, and the fifth message includes: a communication session start message; the electric vehicle communication controller sends a fifth signal; the target standard charging pile controller responds to the fifth signal and sends a first signal, including: After the target standard charging pile controller and the electric vehicle communication controller complete the message interaction in the power attenuation stage, the electric vehicle communication controller sends a communication session start message to the target standard charging pile controller, and the target standard charging pile controller responds to the communication session start message and sends a communication session start response message to the electric vehicle communication controller. The electric vehicle communication controller establishes a communication session with the target standard charging pile controller according to the communication session start response message and sends a charging handshake message to the battery management controller. The battery management controller communicates and shakes hands with the electric vehicle communication controller according to the charging handshake message.

5. The communication protocol consistency simulation test method according to claim 3, characterized in that: The first message includes: an authorization and authentication response message, the second signal includes: a switch control signal, the third signal includes: a switch closing signal, the fourth signal includes: a control guidance signal, and the fifth message includes: an authorization and authentication message. The electric vehicle communication controller sends the fifth signal; the target standard charging pile controller responds to the fifth signal and sends the first signal, and also includes: After the battery management controller and the electric vehicle communication controller communicate and shake hands, the electric vehicle communication controller sends an authorization authentication message to the target standard charging pile controller, and the target standard charging pile controller responds to the authorization authentication message and sends an authorization authentication response message to the electric vehicle communication controller, and the electric vehicle communication controller sends a switch control signal to the battery management controller according to the authorization authentication response message; The battery management controller closes the switch in response to the switch control signal, so that the electric vehicle communication controller sends a control guidance signal to the target standard charging pile controller after receiving the switch closure signal, and the control guidance signal includes a second preset voltage value.

6. The communication protocol consistency simulation test method according to claim 4, characterized in that: The first message includes: an insulation detection response message, the fifth message includes: an insulation detection request message, the electric vehicle communication controller sends a fifth signal, the target standard charging pile controller responds to the fifth signal and sends the first signal, and further includes: When the electric vehicle communication controller sends an insulation detection request message to the target standard charging pile controller, the target standard charging pile controller continuously sends insulation detection response messages to the electric vehicle communication controller, and the electric vehicle communication controller responds to the insulation detection response message and performs insulation detection interaction with the electric vehicle communication controller.

7. The communication protocol consistency simulation test method according to claim 4, characterized in that: The first message includes: a pre-charging response message, the third message includes: a first charging status message and a second charging status message, the fourth message includes: a pre-charging preparation completion message, the fifth message includes: a pre-charging request message, the electric vehicle communication controller sends a fifth signal, the target standard charging pile controller responds to the fifth signal and sends the first signal, and further includes: When the electric vehicle communication controller sends a pre-charging request message to the target standard charging pile controller, the battery management controller sends a first charging status message to the electric vehicle communication controller. After a preset period of time, the battery management controller sends a second charging status message to the electric vehicle communication controller. The electric vehicle communication controller sends a pre-charging preparation completion message to the target standard charging pile controller according to the second charging status message. The target standard charging pile controller sends a pre-charging response message to the electric vehicle communication controller according to the pre-charging preparation completion message. The target standard charging pile controller interacts with the electric vehicle communication controller in the target standard charging process according to the pre-charging preparation completion message.

8. The communication protocol consistency simulation test method according to claim 7, characterized in that: The second message includes: a charging demand request message, when the pre-charging voltage indicated by the pre-charging response message is less than the requested voltage indicated by the pre-charging request message, the battery management controller receives the charging demand request message sent by the electric vehicle communication controller; The battery management controller interacts with the electric vehicle communication controller to perform a national standard charging process according to the charging demand request message.

9. A testing system, characterized in that: The test system includes: a simulation device and an electric vehicle communication controller, the simulation device includes: a target standard charging pile controller, a first communication module, a battery management controller, a second communication module and a main controller, the target standard charging pile controller is connected to the electric vehicle communication controller via the first communication module, the battery management controller is connected to the electric vehicle communication controller via the second communication module, and the main controller is connected to the first communication module and the second communication module; The simulation device is used to execute the steps of the communication protocol consistency simulation test method according to any one of claims 1 to 8.

10. A testing device, characterized in that: The test system according to claim 9 is deployed in the test device.

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