Electric vehicle charging device and process suitable for European standard charging pile and vehicle

Abstract

The invention relates to the technical field of new energy vehicle charging, in particular to an electric vehicle charging device and process suitable for a European standard charging pile and a vehicle. The charging device comprises a communication converter EVCC, a battery management system BMS, a vehicle-mounted charger OBC and an electric vehicle power supply device EVSE. The EVSE interacts with the EVCC through a power line carrier communication protocol PLC, and the EVSE interacts with the BMS and the OBC through a controller area network bus communication protocol CAN; the EVSE and the EVCC cooperatively work through the European standard charging connection confirmation signal PP, the European standard control guide signal CP European standard and the ground PE European standard to jointly complete the charging process. According to the charging device, charging compatibility between the European standard charging pile and vehicle charging is achieved, the national standard charging process implemented in China does not need to be greatly changed, and the development cycle and development cost can be greatly saved.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle charging technology, and in particular to an electric vehicle charging device, process, and vehicle suitable for European standard charging piles. Background Technology

[0002] With the development of new energy technologies, especially in the field of new energy vehicles, their application is becoming increasingly widespread. New energy vehicles account for a large proportion of the market in China, indicating that new energy technologies are becoming increasingly sophisticated. Meanwhile, European countries are gradually increasing their demand for Chinese new energy vehicles. Since China uses the charging protocol GB / T 27930, while Europe uses ISO 15118 and DIN 70121, adjustments to the protocols are needed to meet European charging requirements. However, this process can lead to problems such as long development cycles and poor charging compatibility.

[0003] Chinese patent document CN20481705A discloses "An electric vehicle charging system, method, and vehicle." The electric vehicle communication conversion module connects to a European standard charging socket via a first communication protocol bus, and also connects to a battery management system. The battery management system, vehicle controller, and on-board charger are connected via a second communication protocol bus. This achieves compatibility with both domestic and international development and adaptability to domestic and international charging infrastructure. The disadvantage of this technology is that it involves numerous and complex systems and modules, and may actually increase the development cycle and costs of vehicle components rather than significantly reduce them. Summary of the Invention

[0004] Technical objective: In order to overcome the shortcomings of the existing technology, the present invention provides an electric vehicle charging device, process and vehicle suitable for European standard charging piles, so as to solve the problem that the existing technology has a large number of systems and participating modules and is relatively complex, resulting in long development cycles and high costs for vehicle parts.

[0005] To address the shortcomings of existing technologies, one objective of this invention is to provide an electric vehicle charging device suitable for European standard charging piles, comprising a communication converter EVCC, a battery management system (BMS), an on-board charger (OBC), and an electric vehicle power supply device (EVSE); the EVSE interacts with the communication converter EVCC via a power line carrier communication protocol (PLC); the EVSE interacts with the BMS and the OBC via a controller area network bus communication protocol (CAN); its key feature is: The electric vehicle power supply device EVSE and the communication converter EVCC communicate via a European standard charging connection confirmation signal PP and a European standard control guidance signal CP. 欧标 PE ground 欧标Working together to complete the charging process; the European standard charging connection confirmation signal PP is used to confirm the physical connection between the charging gun and the electric vehicle, and the European standard control guidance signal CP... 欧标 Responsible for confirming connection status and controlling charging status; The on-board charger (OBC) and the communication converter (EVCC) communicate via a national standard charging connection confirmation signal (CC) and a national standard charging connection confirmation signal (CP). 国标 PE ground 国标 The on-board charger (OBC) is connected via a hard wire and controls the electronic lock to close and open. The battery management system (BMS) and the communication converter (EVCC) are connected via a hardwired connection: A+ (low-voltage auxiliary power positive), CC2 (charging connection confirmation signal), CHCANH (charging communication CAN high), and CHCANL (charging communication CAN low). The charging communication protocol is implemented in accordance with the national standard GB / T27930.

[0006] Furthermore, the electric vehicle power supply equipment EVSE interacts with the battery management system BMS and the on-board charger OBC via the Controller Area Network (CAN) bus communication protocol, including PCANH bus CAN communication high and PCANL bus CAN communication low.

[0007] The second objective of this invention is to provide a charging process for electric vehicles suitable for European standard charging stations, using the charging device described in any one of claims 1 to 2 to charge the electric vehicle, comprising: unplugging the European standard charging gun from the European standard charging station and then inserting it into the European standard charging socket of the electric vehicle; and using the European standard control guidance signal CP. 欧标 The EVCC communication converter is activated and used to inform the user of the charging method and the output capability of the European standard charging station. When the communication converter EVCC detects the European standard control guidance signal CP 欧标 When the PWM duty cycle is 3%~7%, it enters the [S1] DC charging process; when the communication converter EVCC detects the European standard control guidance signal CP... 欧标 When the PWM duty cycle is 9%~97%, the AC charging process [S2] begins.

[0008] Furthermore, the DC charging process includes: [S1.1] The communication converter EVCC outputs a charging connection confirmation signal CC2 and an A+ low-voltage auxiliary power positive signal to wake up the battery management system BMS and perform DC charging interaction through the national standard GB / T 27930 protocol; [S1.2] The communication converter EVCC outputs a national standard charging connection confirmation signal CP. 国标—直流 The on-board charger (OBC) is activated, and the OBC receives the national standard charging connection confirmation signal (CP).国标—直流 The electronic lock is then engaged, and the communication converter EVCC closes the S2 switch. [S1.3] The Battery Management System (BMS) requests a high-voltage connection command according to the vehicle's national standard GB / T27930 DC charging procedure and completes the connection of the vehicle to high voltage. [S1.4] The battery management system (BMS) turns off insulation detection and judgment, makes fault judgment according to the insulation value forwarded by the communication converter EVCC from the European standard charging pile, and performs fast charging relay adhesion detection according to the terminal voltage of the European standard charging pile. The timeout judgment of the maximum output capacity of the European standard charging pile (CML), the time synchronization information sent by the European standard charging pile (CTS), and the charger identification message (CRM) is adjusted to 60s. [S1.5] If a European standard charging station malfunction is detected, or if the BMS stops charging or the charging gun disconnects abnormally, the communication converter EVCC will stop sending CP signals. 国标—直流 Signal: The on-board charger (OBC) unlocks the electronic lock, disconnects S2, and charging ends.

[0009] Furthermore, the AC charging process includes: [S2.1] Output the corresponding resistance value of the Chinese standard charging connection confirmation signal CC based on the resistance value of the European standard charging connection confirmation signal PP; [S2.2] The communication converter EVCC outputs a national standard charging connection confirmation signal CP. 国标—交流 The on-board charger (OBC) detected the CP signal from the communication converter (EVCC). 国标—交流 After the signal is received, the electronic lock is engaged, and the communication converter EVCC closes the S2 switch. [S2.3] The Battery Management System (BMS) requests a high-voltage connection command according to the vehicle's national standard GB / T27930 AC charging procedure and completes the connection of the vehicle to high voltage. [S2.4] The communication converter EVCC and the European standard charging pile interact to output AC power, and the on-board charger OBC charges according to the vehicle slow charging process; [S2.5] If a charging gun disconnection signal is received or the on-board charger (OBC) sends a charging completion signal, the communication converter (EVCC) will stop sending CP signals. 国标—交流 Signal: The on-board charger (OBC) unlocks the electronic lock, disconnects S2, and charging ends.

[0010] Furthermore, the resistance values ​​corresponding to the national standard charging connection confirmation signal CC in step [S2.1] include: CC resistance value of 220Ω, which can support 32A current; CC resistance value of 100Ω, which can support 63A current.

[0011] Furthermore, the charging termination conditions in step [S2.5] include: after the power battery reaches a preset power threshold, the BMS sends a signal to stop charging; the charging time reaches a set time, which is determined by the user; and the European standard charging pile sends a fault signal and the charging gun disconnects, then the vehicle charging ends.

[0012] A third objective of this invention is to provide an electric vehicle suitable for European standard charging stations, comprising the charging device described in any one of claims 1 to 2.

[0013] The beneficial effects of this invention are: This invention provides an electric vehicle charging process suitable for European standard charging piles, achieving charging compatibility between European standard charging piles and vehicle charging. It does not require significant modifications to the national standard charging process already implemented in China. Currently, EVCC, BMS, and OBC are all mature product solutions, requiring only customized development for the vehicle, greatly saving development time and costs. Furthermore, this process is simple and less prone to problems. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is an architecture diagram of an electric vehicle charging device suitable for European standard charging piles; Figure 2 This is a schematic diagram of the electric vehicle charging process applicable to European standard charging stations. Detailed Implementation

[0016] The following is in conjunction with the appendix Figure 1 To be continued Figure 2 The principles and features of the present invention are described, and the examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0017] Example 1, as Figure 1 As shown, an electric vehicle charging device suitable for European standard charging piles includes a communication converter EVCC, a battery management system (BMS), an on-board charger (OBC), and an electric vehicle power supply device (EVSE). The EVSE and the communication converter EVCC interact via a power line carrier communication protocol (PLC). The EVSE, the battery management system (BMS), and the on-board charger (OBC) interact via a controller area network (CAN) bus communication protocol (CAN). The protocol includes a PCANH bus CAN high and a PCANL bus CAN low.

[0018] The electric vehicle power supply unit EVSE and the communication converter EVCC communicate with the European standard charging connection confirmation signal PP and the European standard control guidance signal CP. 欧标 PE ground 欧标 Working together to complete the charging process; the European standard charging connection confirmation signal PP is used to confirm the physical connection between the charging gun and the electric vehicle, and the European standard control guidance signal CP... 欧标 Responsible for confirming connection status and controlling charging status; The on-board charger (OBC) and the communication converter (EVCC) communicate via the national standard charging connection confirmation signal CC and the national standard charging connection confirmation signal CP. 国标 PE ground 国标 Hard-wired connection; the on-board charger (OBC) controls the electronic lock's opening and closing. The Battery Management System (BMS) and the Communication Converter (EVCC) are connected via a hardwired connection: A+ (low-voltage auxiliary power positive), CC2 (charging connection confirmation signal), CHCANH (charging communication CAN high), and CHCANL (charging communication CAN low). The charging communication protocol is implemented in accordance with the national standard GB / T27930.

[0019] It should be noted that the Power Line Carrier (PLC) communication protocol is a commonly used international charging communication protocol, while the Controller Area Network (CAN) bus communication protocol is a commonly used domestic communication protocol. The communication converter EVCC interacts with European standard charging piles via the PLC communication protocol, and with the BMS and OBC via the CAN communication protocol. Both network communication protocols use the EVCC as a link to enable interaction between foreign charging systems and domestically exported vehicles.

[0020] Example 2, as Figure 2 As shown, an electric vehicle charging process suitable for European standard charging piles, using the charging device described in any one of claims 1 to 2 to charge the electric vehicle, includes: unplugging the European standard charging gun from the European standard charging pile and then inserting it into the European standard charging socket of the electric vehicle; European standard control guidance signal CP 欧标 The EVCC communication converter is activated and used to inform the user of the charging method and the output capability of the European standard charging station. When the communication converter EVCC detects the European standard control guidance signal CP 欧标 When the PWM duty cycle is 3%~7%, the [S1] DC charging process begins, including: [S1.1] The communication converter EVCC outputs a charging connection confirmation signal CC2 and an A+ low-voltage auxiliary power positive signal to wake up the battery management system BMS and perform DC charging interaction through the national standard GB / T 27930 protocol; [S1.2] The communication converter EVCC outputs a national standard charging connection confirmation signal CP. 国标—直流The on-board charger (OBC) is activated, and the OBC receives the national standard charging connection confirmation signal (CP). 国标—直流 After locking the electronic lock, the communication converter EVCC closes the S2 switch; the S2 switch can change the CP signal level to confirm whether charging can be started.

[0021] [S1.3] The Battery Management System (BMS) requests a high-voltage connection command according to the vehicle's national standard GB / T27930 DC charging procedure and completes the connection of the vehicle to high voltage. This operation can be performed by the vehicle according to the national standard charging procedure without any changes, thus reducing the workload of development.

[0022] [S1.4] The battery management system (BMS) turns off insulation detection and judgment, makes fault judgment according to the insulation value forwarded by the communication converter EVCC from the European standard charging pile, and performs fast charging relay adhesion detection according to the terminal voltage of the European standard charging pile. The timeout judgment of the maximum output capacity of the European standard charging pile (CML), the time synchronization information sent by the European standard charging pile (CTS), and the charger identification message (CRM) is adjusted to 60s. Because charging stations perform insulation tests on the charging port and the entire vehicle, if the vehicle also has insulation monitoring enabled, the two systems will be incompatible and charging will stop. To improve compatibility with European charging standards, the timeout settings for the charging station's maximum output capacity (CML), charging station time synchronization information (CTS), and charger identification message (CRM) have been increased to 60 seconds, thus enhancing the compatibility of the vehicle charging process.

[0023] [S1.5] If a European standard charging station malfunction is detected, or if the BMS stops charging or the charging gun disconnects abnormally, the communication converter EVCC will stop sending CP signals. 国标—直流 Signal: The on-board charger (OBC) unlocks the electronic lock, disconnects S2, and charging ends.

[0024] When the communication converter EVCC detects the European standard control guidance signal CP 欧标 When the PWM duty cycle is 9%~97%, the [S2] AC charging process begins, including: [S2.1] Output the corresponding resistance value of the national standard charging connection confirmation signal CC according to the resistance value of the European standard charging connection confirmation signal PP; the resistance value of CC is 220Ω, which can support 32A current; the resistance value of CC is 100Ω, which can support 63A current.

[0025] [S2.2] The communication converter EVCC outputs a national standard charging connection confirmation signal CP. 国标—交流 The on-board charger (OBC) detected the CP signal from the communication converter (EVCC). 国标—交流 After the signal is received, the electronic lock is engaged, and the communication converter EVCC closes the S2 switch. The S2 switch can change the CP signal level to confirm whether charging can be started.

[0026] [S2.3] The Battery Management System (BMS) requests a high-voltage connection command according to the vehicle's national standard GB / T27930 AC charging procedure and completes the connection of the vehicle to high voltage. [S2.4] The communication converter EVCC and the European standard charging pile interact to output AC power, and the on-board charger OBC charges according to the vehicle slow charging process; Steps [S2.3] and [S2.4] simply require the vehicle to follow the national standard charging process without any changes, thus reducing the workload of development.

[0027] [S2.5] If a charging gun disconnection signal is received or the on-board charger (OBC) sends a charging completion signal, the communication converter (EVCC) will stop sending CP signals. 国标—交流 Signal: The on-board charger (OBC) unlocks the electronic lock, disconnects S2, and charging ends.

[0028] Charging termination conditions include: the BMS sends a signal to stop charging after the power battery reaches a preset power threshold; the charging time reaches a set time, which is determined by the user; and the vehicle charging ends when the European standard charging station sends a fault signal and the charging gun disconnects.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electric vehicle charging device suitable for European standard charging piles, comprising a communication converter EVCC, a battery management system (BMS), an on-board charger (OBC), and an electric vehicle power supply device (EVSE); wherein the EVSE interacts with the communication converter EVCC via a power line carrier communication protocol (PLC); and the EVSE interacts with the battery management system (BMS) and the on-board charger (OBC) via a controller area network bus communication protocol (CAN); characterized in that: The electric vehicle power supply device EVSE and the communication converter EVCC communicate via a European standard charging connection confirmation signal PP and a European standard control guidance signal CP. 欧标 PE ground 欧标 Working together to complete the charging process; the European standard charging connection confirmation signal PP is used to confirm the physical connection between the charging gun and the electric vehicle, and the European standard control guidance signal CP... 欧标 Responsible for confirming connection status and controlling charging status; The on-board charger (OBC) and the communication converter (EVCC) communicate via a national standard charging connection confirmation signal (CC) and a national standard charging connection confirmation signal (CP). 国标 PE ground 国标 The on-board charger (OBC) is connected via a hard wire and controls the electronic lock to close and open. The battery management system (BMS) and the communication converter (EVCC) are connected via a hardwired connection: A+ (low-voltage auxiliary power positive), CC2 (charging connection confirmation signal), CHCANH (charging communication CAN high), and CHCANL (charging communication CAN low). The charging communication protocol is implemented in accordance with the national standard GB / T27930.

2. The electric vehicle charging device for European standard charging piles according to claim 1, wherein the electric vehicle power supply equipment EVSE interacts with the battery management system BMS and the on-board charger OBC via the controller local area network bus communication protocol CAN, including PCANH bus CAN communication high and PCANL bus CAN communication low.

3. A charging process for electric vehicles suitable for European standard charging stations, comprising charging an electric vehicle using the charging device described in any one of claims 1 to 2, including: Unplug the European standard charging gun from the European standard charging station and then plug it into the European standard charging socket for electric vehicles; European standard control guidance signal CP 欧标 The EVCC communication converter is activated and used to inform the user of the charging method and the output capability of the European standard charging station. When the communication converter EVCC detects the European standard control guidance signal CP 欧标 When the PWM duty cycle is 3%~7%, it enters the [S1] DC charging process; when the communication converter EVCC detects the European standard control guidance signal CP... 欧标 When the PWM duty cycle is 9%~97%, the AC charging process [S2] begins.

4. The electric vehicle charging process applicable to European standard charging piles according to claim 3, wherein the DC charging process includes: [S1.1] The communication converter EVCC outputs a charging connection confirmation signal CC2 and an A+ low-voltage auxiliary power positive signal to wake up the battery management system BMS and perform DC charging interaction through the national standard GB / T 27930 protocol; [S1.2] The communication converter EVCC outputs a national standard charging connection confirmation signal CP. 国标—直流 The on-board charger (OBC) is activated, and the OBC receives the national standard charging connection confirmation signal (CP). 国标—直流 The electronic lock is then engaged, and the communication converter EVCC closes the S2 switch. [S1.3] The Battery Management System (BMS) requests a high-voltage connection command according to the vehicle's national standard GB / T27930 DC charging procedure and completes the connection of the vehicle to high voltage. [S1.4] The battery management system (BMS) turns off insulation detection and judgment, makes fault judgment according to the insulation value forwarded by the communication converter EVCC from the European standard charging pile, and performs fast charging relay adhesion detection according to the terminal voltage of the European standard charging pile. The timeout judgment of the maximum output capacity of the European standard charging pile (CML), the time synchronization information sent by the European standard charging pile (CTS), and the charger identification message (CRM) is adjusted to 60s. [S1.5] If a European standard charging station malfunction is detected, or if the BMS stops charging or the charging gun disconnects abnormally, the communication converter EVCC will stop sending CP signals. 国标—直流 Signal: The on-board charger (OBC) unlocks the electronic lock, disconnects S2, and charging ends.

5. The electric vehicle charging process applicable to European standard charging piles according to claim 3, wherein the AC charging process includes: [S2.1] Output the corresponding resistance value of the Chinese standard charging connection confirmation signal CC based on the resistance value of the European standard charging connection confirmation signal PP; [S2.2] The communication converter EVCC outputs a national standard charging connection confirmation signal CP. 国标—交流 The on-board charger (OBC) detected the CP signal from the communication converter (EVCC). 国标—交流 After the signal is received, the electronic lock is engaged, and the communication converter EVCC closes the S2 switch. [S2.3] The Battery Management System (BMS) requests a high-voltage connection command according to the vehicle's national standard GB / T27930 AC charging procedure and completes the connection of the vehicle to high voltage. [S2.4] The communication converter EVCC and the European standard charging pile interact to output AC power, and the on-board charger OBC charges according to the vehicle slow charging process; [S2.5] If a charging gun disconnection signal is received or the on-board charger (OBC) sends a charging completion signal, the communication converter (EVCC) will stop sending CP signals. 国标—交流 Signal: The on-board charger (OBC) unlocks the electronic lock, disconnects S2, and charging ends.

6. The electric vehicle charging process applicable to European standard charging piles according to claim 5, wherein the resistance value corresponding to the national standard charging connection confirmation signal CC in step [S2.1] includes: The resistance of CC is 220Ω, which can support a current of 32A; The resistance of CC is 100Ω, which can support a current of 63A.

7. The electric vehicle charging process applicable to European standard charging piles according to claim 5, wherein the charging termination condition in step [S2.5] includes: Once the power battery reaches the preset power threshold, the BMS will issue a signal to stop charging; the charging time will reach the set time, which is determined by the user. When the European standard charging station sends a fault signal and the charging gun disconnects, the vehicle charging will end.

8. An electric vehicle suitable for European standard charging stations, comprising the charging device according to any one of claims 1 to 2.

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