Compatible alternating current charging control system, control method, equipment and storage medium

Abstract

The invention discloses a compatible AC charging control system, a control method, equipment and a storage medium, and the method comprises the steps: judging whether a current vehicle model is a European standard vehicle model or a national standard vehicle model through a whole vehicle configuration code, and entering a European standard AC charging process if the current vehicle model is the European standard vehicle model; detecting a CC signal through the OBC, and determining the maximum charging current of the charging gun according to the resistance value of the CC signal; the CP signal is detected through the OBC, and the maximum charging current of the charging pile is determined according to the duty ratio of the CP signal; and connecting charging equipment, and starting alternating current charging. Through benchmarking analysis of CC resistance values and CP duty ratio signals of the national standard and European standard alternating current charging piles, an alternating current charging control strategy compatible with the national standard and European standard alternating current charging piles is given, the method is realized by changing VCU and OBC software of the whole vehicle, and the problem of alternating current charging when the national standard alternating current charging vehicle exits the European is solved under the condition that the cost of the whole vehicle is not increased.

Description

Technical Field

[0001] The present invention belongs to the technical field of AC charging control for new energy vehicles, and specifically relates to a compatible AC charging control system, control method, device, and storage medium. The invention is applied to NAT vehicles exported to Europe, solving the AC charging problem of national standard AC charging vehicles exported to Europe. Background Art

[0002] With the increasing demand for vehicles exported to Europe, the need for AC charging strategies that meet the European standard AC charging pile protocol has become extremely urgent. Due to differences in communication signals between European standard AC charging piles and Chinese standard AC charging piles, vehicles that meet Chinese standard charging piles cannot be charged using European standard AC charging piles when exported to Europe.

[0003] Some automakers have adopted the solution of adding charging controllers to address the issue of charging with European-standard charging piles, but this solution is costly. Others have adopted adapters for converting Chinese-standard charging to European-standard charging, but this solution does not meet European regulatory requirements. As for solutions designed solely for European-standard AC charging, few industry experts have provided strategies for this.

[0004] Therefore, there is an urgent need to provide a control strategy that enables vehicle models that meet the national standard AC charging protocol to also meet the European standard AC charging control requirements after export. Summary of the Invention

[0005] To address the above-mentioned problems in the prior art, the present invention provides a compatible AC charging control system and control method. By comparing and analyzing the CC resistance and CP duty cycle signals of national and European standard AC charging piles, an AC charging control strategy compatible with both national and European standard AC charging piles is proposed. This strategy is implemented by modifying the vehicle VCU and OBC software, solving the AC charging problem of national standard AC charging vehicles exported to Europe without increasing the cost of the entire vehicle.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] As a first aspect of the present invention, a compatible AC charging control system is provided, which is integrated in an OBC and includes a charging mode recognition module, a CC signal strategy benchmarking module, a CP signal strategy benchmarking module, a charging gun maximum charging current recognition module, a charging pile maximum charging current recognition module, and a charging connection module.

[0008] The charging mode recognition module is used to identify whether the vehicle to be charged is a European standard model or an identification model according to the vehicle identification code;

[0009] The CC signal strategy benchmarking module includes a CC signal national standard and European standard strategy benchmarking table, which can reflect the corresponding national standard charging gun maximum current and European standard power supply equipment maximum current under each RC resistance value;

[0010] The CP signal strategy benchmarking module includes a CP signal national standard and European standard strategy benchmarking table, which can reflect the corresponding national standard charging gun maximum current and European standard power supply equipment maximum current under each PWM duty cycle range;

[0011] The charging gun maximum charging current identification module determines the maximum charging current of the charging gun according to the CC signal detected by the OBC and the CC signal national standard and European standard strategy benchmarking table;

[0012] The charging pile maximum charging current identification module determines the maximum charging current of the charging device according to the CP signal duty cycle detected by the OBC and the CP signal national standard and European standard strategy benchmarking table;

[0013] The charging connection module is used to connect or disconnect the AC charging device, and then start or stop AC charging.

[0014] Furthermore, the vehicle configuration code is a DID added to the vehicle, with a total of 8 bytes, supporting 22 / 2E services, and is used to distinguish between European standard models and national standard models.

[0015] Furthermore, the CC signal national standard and European standard strategy benchmarking table is as follows:

[0016]

[0017] As a second aspect of the present invention, a compatible AC charging control method is provided, which is implemented by the control system described above and includes the following steps:

[0018] S1. Determine whether the current vehicle model is a European standard model or a national standard model through the vehicle configuration code. If it is a European standard model, enter the European standard AC charging process and execute step S2; otherwise, enter the original national standard AC charging process;

[0019] S2. Detect the CC signal through OBC and determine the maximum charging current of the charging gun based on the CC signal resistance;

[0020] S3 detects the CP signal through the OBC and determines the maximum charging current of the charging pile according to the CP signal duty cycle;

[0021] S4. Connect the charging device and start AC charging.

[0022] Furthermore, the step S2 includes:

[0023] OBC detects the CC signal. If the CC signal resistance is 1500Ω, the maximum charging current of the corresponding charging gun is 13A.

[0024] If the resistance value of the CC signal is 680 Ω, the maximum charging current of the corresponding charging gun is 20 A.

[0025] Further, the step S3 includes:

[0026] The OBC detects the CP signal. When the CP duty cycle D is in the range of 85% < D ≤ 96%, the maximum charging current of the charging pile is (D * 100 - 64) * 2.5 A;

[0027] When the CP duty cycle D is in the range of 96% < D ≤ 97%, the maximum charging current of the charging pile is 80 A;

[0028] When the CP duty cycle D is in the range of 97% < D ≤ 100%, charging is not allowed.

[0029] Further, the step S4 includes:

[0030] The OBC judges the status of the electronic lock, closes the S2 switch after detecting that the electronic lock is closed, and then starts AC charging;

[0031] When the power battery is fully charged or the user manually ends the charging, the OBC ends the charging.

[0032] As a third aspect of the present invention, there is provided a computer device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements a compatible AC charging control method as described in the present invention.

[0033] As a fourth aspect of the present invention, there is provided a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, it implements a compatible AC charging control method as described in the present invention.

[0034] The present invention has the following beneficial effects:

[0035] By adding a vehicle configuration code, the present invention identifies European standard models and national standard models, and enters the corresponding charging control process according to the identification results;

[0036] The present invention establishes a national standard and European standard benchmarking strategy for CC signals and CP signals to achieve compatible control of national standard and European standard AC charging; [[ID= 37]]

[0037] The OBC of the present invention detects the CC signal, judges the maximum charging current of the charging gun according to the resistance value of the CC signal according to the European standard strategy; then detects the CP signal through the OBC, and judges the maximum charging current of the charging pile according to the CP signal duty cycle according to the European standard strategy.

[0038] The present invention is realized by changing the vehicle VCU and OBC software, and solves the AC charging problem of national standard AC charging vehicles exported to Europe without increasing the vehicle cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings used in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0040] Figure 1 This is a flow chart of a compatible AC charging control method described in Example 2 of the present invention.

[0041] Figure 2 This is a schematic diagram of the structure of a computer device described in Example 3 of the present invention. DETAILED DESCRIPTION

[0042] First, a comparative analysis of national standard AC charging and European standard AC charging control is conducted:

[0043] AC charging control guidance uses the connection of the charging gun and the opening and closing of the vehicle-side S2 switch to change the voltage at the detection point on the CP line, thereby enabling the vehicle and charging pile to identify and switch charging status. In addition, the charging pile generates PWM signals with different duty cycles to inform the vehicle of the maximum current it can provide.

[0044] The CC resistance and CP duty cycle signals of the national standard AC charging pile are different from those of the European standard AC charging pile, but they can be made compatible through software strategies.

[0045] In the national standard AC charging pile control and guidance circuit, the OBC determines whether the connection is established by measuring the resistance between detection point 3 and PE. Once fully connected, the resistance value confirms the current capacity of the current charging connection device (cable). The CC signal has two connection states, related to the opening and closing of the S3 switch. The semi-connected state indicates an unsuccessful connection, while the fully connected state indicates a successful connection. The CP signal has two connection states: 12V and PWM. A continuous 12V indicates that the charging pile is unusable. The maximum current of the current power supply device is confirmed by measuring the duty cycle of the PWM signal at detection point 2.

[0046] In the European standard AC charging station control and guidance circuit, the EVSE communicates by setting the duty cycle of the PWM signal. A duty cycle of 3%-97% is the normal operating range for AC charging. The European standard proximity circuit is used for both proximity detection and current coding, similar to the national standard CC detection circuit.

[0047] By analyzing the differences between the national and European AC charging standards, the European AC charging strategy has been modified based on the national standard:

[0048] 1. CC function: The 1500-ohm CC resistor corresponds to the 13A current limit point; the 680-ohm CC resistor corresponds to the 20A current limit point; there is no half-connected state.

[0049] 2. CP function: The CP duty cycle working range is 8% - 97%; when 85% < D ≤ 96%, the input current limit value is (D * 100 - 64) * 2.5; when 96% < D ≤ 97%, the input current limit value is 80A; when 97% < D ≤ 100%, the input current limit value is 0A.

[0050] 3. S2 switch control: The S2 switch is closed when the electronic lock is closed, and the S2 switch is opened after the electronic lock is opened to stop charging.

[0051] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0052] Embodiment 1

[0053] This embodiment is a compatible AC charging control system, which is integrated in the OBC and includes a charging mode recognition module, a CC signal strategy comparison module, a CP signal strategy comparison module, a charging gun maximum charging current recognition module, a charging pile maximum charging current recognition module, and a charging connection module;

[0054] The charging mode recognition module is used to identify whether the vehicle to be charged is a European standard model or a domestic model according to the vehicle identification number;

[0055] The CC signal strategy comparison module analyzes and compares the maximum charging current of the charging gun corresponding to the CC signal resistance value signals of the national standard AC charging pile and the European standard AC charging pile to establish a CC signal national standard and European standard strategy comparison table; the CC signal national standard and European standard strategy comparison table can reflect the maximum charging current of the national standard charging gun and the maximum current of the European standard power supply equipment corresponding to each main RC resistance value;

[0056] The CP signal strategy comparison module analyzes and compares the maximum charging current of the charging pile corresponding to the CP signal duty cycle of the national standard AC charging pile and the European standard AC charging pile to establish a CP signal national standard and European standard strategy comparison table; the CP signal national standard and European standard strategy comparison table can reflect the maximum charging current of the national standard charging gun and the maximum current of the European standard power supply equipment corresponding to each main PWM duty cycle range;

[0057] The charging gun maximum charging current identification module determines the maximum charging current of the charging gun according to the CC signal detected by the OBC and the CC signal national standard and European standard strategy benchmarking table;

[0058] The charging pile maximum charging current identification module determines the maximum charging current of the charging device according to the CP signal duty cycle detected by the OBC and the CP signal national standard and European standard strategy benchmarking table;

[0059] The charging connection module is used to connect or disconnect the AC charging device, and then start or stop AC charging.

[0060] Furthermore, the vehicle configuration code is a DID added to the vehicle, with a total of 8 bytes, supporting 22 / 2E services, and is used to distinguish between European standard models and national standard models.

[0061] Furthermore, the CC signal national standard and European standard strategy comparison table is shown in Table 1:

[0062] Table 1 Comparison of CC signal national and European standards

[0063]

[0064] Furthermore, the CP signal national standard and European standard strategy benchmarking table is shown in Table 2:

[0065] Table 2 Comparison of national and European standards for CP signal strategies

[0066]

[0067] Furthermore, the charging connection module controls the S2 switch according to the closed state of the electronic lock to connect or disconnect the AC charging device.

[0068] Example 2

[0069] like Figure 2 As shown, this embodiment is a compatible AC charging control method, which is implemented by the control system described in Example 1 and includes the following steps:

[0070] S1. Determine whether the current vehicle model is a European standard model or a national standard model through the vehicle configuration code. If it is a European standard model, enter the European standard AC charging process and execute step S2; otherwise, enter the original national standard AC charging process;

[0071] S2. Detect the CC signal through OBC and determine the maximum charging current of the charging gun based on the CC signal resistance;

[0072] S3 detects the CP signal through the OBC and determines the maximum charging current of the charging pile according to the CP signal duty cycle;

[0073] S4. Connect the charging device and start AC charging.

[0074] Further, in the step S1, a DID is added to the whole vehicle, and this DID is used to distinguish European standard models and national standard models.

[0075] Further, the step S2 includes:

[0076] The OBC detects the CC signal. If the resistance value of the CC signal is 1500Ω, the maximum charging current of the corresponding charging gun is 13A;

[0077] If the resistance value of the CC signal is 680Ω, the maximum charging current of the corresponding charging gun is 20A.

[0078] Further, the step S3 includes:

[0079] The OBC detects the CP signal. When the duty cycle D of the CP is 85% < D ≤ 96%, the maximum charging current of the charging pile is (D * 100 - 64) * 2.5A;

[0080] When the duty cycle D of the CP is 96% < D ≤ 97%, the maximum charging current of the charging pile is 80A;

[0081] When the duty cycle D of the CP is 97% < D ≤ 100%, charging is not allowed.

[0082] Further, the step S4 includes:

[0083] The OBC judges the state of the electronic lock, detects that the electronic lock is closed and then closes the S2 switch, and then starts AC charging;

[0084] When the power battery is full or the user manually ends the charging, the OBC ends the charging.

[0085] Embodiment 3

[0086] Figure 2 It is a schematic structural diagram of a computer device in Embodiment 3 of the present invention. Figure 2 It shows a block diagram of an exemplary computer device 12 suitable for implementing the embodiments of the present invention. Figure 2 The shown computer device 12 is only an example and should not bring any limitation to the functions and usage scope of the embodiments of the present invention.

[0087] As Figure 2 shown, the computer device 12 is presented in the form of a general computing device. The components of the computer device 12 may include but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 connecting different system components (including the system memory 28 and the processing unit 16).

[0088] Bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor, or a local bus using any of a variety of bus architectures. Examples of these architectures include, but are not limited to, an Industry Standard Architecture (ISA) bus, a Micro Channel Architecture (MAC) bus, an Enhanced ISA bus, a Video Electronics Standards Association (VESA) local bus, and a Peripheral Component Interconnect (PCI) bus.

[0089] The computer device 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by the computer device 12, including volatile and non-volatile media, removable and non-removable media.

[0090] System memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. Computer device 12 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, storage system 34 may be configured to read and write non-removable, non-volatile magnetic media ( Figure 2 Not shown, often called a "hard drive"). Although Figure 2 Not shown, a magnetic disk drive for reading and writing to a removable non-volatile magnetic disk (e.g., a "floppy disk"), and an optical disk drive for reading and writing to a removable non-volatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to bus 18 via one or more data media interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of various embodiments of the present invention.

[0091] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in memory 28. Such program modules 42 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may include an implementation of a network environment. Program modules 42 generally perform the functions and / or methodologies of the embodiments described herein.

[0092] The computer device 12 can also communicate with one or more external devices 14 (e.g., a keyboard, a pointing device, a display 24, etc.), one or more devices that enable a user to interact with the computer device 12, and / or any device that enables the computer device 12 to communicate with one or more other computing devices (e.g., a network card, a modem, etc.). This communication can be performed via an input / output (I / O) interface 22. In addition, in the computer device 12 of this embodiment, the display 24 is not a separate entity, but is embedded in the mirror surface. When the display surface of the display 24 is not displayed, the display surface of the display 24 and the mirror surface are visually integrated. Furthermore, the computer device 12 can also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) via a network adapter 20. As shown in the figure, the network adapter 20 communicates with other modules of the computer device 12 via a bus 18. It should be understood that although not shown in the figures, other hardware and / or software modules may be used in conjunction with the computer device 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0093] The processing unit 16 executes various functional applications and data processing by running programs stored in the system memory 28 , such as implementing a compatible AC charging control method provided by an embodiment of the present invention.

[0094] Example 4

[0095] Embodiment 4 of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, a compatible AC charging control method as provided in all the embodiments of the present application is implemented.

[0096] Any combination of one or more computer-readable media can be used. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or component, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, device or device.

[0097] A computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, which carries computer-readable program code. Such a propagated data signal may take a variety of forms, including, but not limited to, electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0098] Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0099] Computer program code for performing the operations of the present invention may be written in one or more programming languages, or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0100] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A compatible AC charging control system, which is integrated in the OBC, characterized in that: It includes charging mode recognition module, CC signal strategy benchmarking module, CP signal strategy benchmarking module, charging gun maximum charging current recognition module, charging pile maximum charging current recognition module and charging connection module; The charging mode identification module is used to identify whether the vehicle to be charged is a European standard model or an identification model according to the vehicle identification code; The CC signal strategy benchmarking module includes a CC signal national standard and European standard strategy benchmarking table, which can reflect the maximum current of the national standard charging gun and the maximum current of the European standard power supply equipment corresponding to each RC resistance value; The CP signal strategy benchmarking module includes a CP signal national standard and European standard strategy benchmarking table, which can reflect the corresponding national standard charging gun maximum current and European standard power supply equipment maximum current under each PWM duty cycle range; The charging gun maximum charging current identification module determines the maximum charging current of the charging gun according to the CC signal detected by the OBC through the CC signal national standard and European standard strategy benchmarking table; The charging pile maximum charging current identification module determines the maximum charging current of the charging device according to the CP signal duty cycle detected by the OBC through the CP signal national standard and European standard strategy benchmarking table; The charging connection module is used to connect or disconnect an AC charging device, thereby starting or stopping AC charging.

2. A compatible AC charging control system as claimed in claim 1, characterized in that: The vehicle configuration code is a DID added to the vehicle, with a total of 8 bytes, supporting 22 / 2E services, and is used to distinguish between European standard models and national standard models.

3. A compatible AC charging control system as claimed in claim 1, characterized in that: The CC signal national standard and European standard strategy benchmarking table is as follows:

4. A compatible AC charging control method, which is implemented by the control system according to claim 1, characterized in that: The following steps are involved: S1. Determine whether the current vehicle model is a European standard model or a national standard model through the vehicle configuration code. If it is a European standard model, enter the European standard AC charging process and execute step S2; otherwise, enter the original national standard AC charging process; S2. Detect the CC signal through OBC and determine the maximum charging current of the charging gun according to the resistance value of the CC signal; S3. Detect the CP signal through OBC and determine the maximum charging current of the charging pile according to the duty cycle of the CP signal; S4. Connect the charging device and start AC charging.

5. A compatible AC charging control method as claimed in claim 4, characterized in that: The step S2 comprises: OBC detects CC signal. If the CC signal resistance is 1500Ω, the maximum charging current of the corresponding charging gun is 13A. If the CC signal resistance is 680Ω, the corresponding maximum charging current of the charging gun is 20A.

6. A compatible AC charging control method as claimed in claim 4, characterized in that: The step S3 comprises: OBC detects the CP signal. When the CP duty cycle D is 85%<D≤96%, the maximum charging current of the charging pile is (D*100-64)*2.5A; When the CP duty cycle D is 96%<D≤97%, the maximum charging current of the charging pile is 80A; When the CP duty cycle D is in the range of 97%<D≤100%, charging is not allowed.

7. A compatible AC charging control method as claimed in claim 4, characterized in that: The step S4 comprises: OBC determines the state of the electronic lock, detects that the electronic lock is closed, then closes the S2 switch, and then starts AC charging; When the power battery is fully charged or the user manually ends charging, OBC ends charging.

8. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, a compatible AC charging control method as described in any one of claims 4-7 is implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, a compatible AC charging control method as described in any one of claims 4 to 7 is implemented.

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