Automatic awakening charging control method for European standard charging pile

Abstract

The invention discloses a European standard charging pile automatic wake-up charging control method, and belongs to the technical field of charging piles. According to the scheme, in the charging starting process and the charging process, when charging fails, charging is interrupted or the charging pile receives the charging continuing signal sent by the fully-charged vehicle, the charging pile executes the awakening operation by sending the vehicle disconnection analog signal to the vehicle, and only when the user triggers the charging stopping instruction or pulls out the charging gun, the awakening operation is executed. And carrying out fee deduction operation and ending the order. According to the scheme, the operation of ending the order is delayed, the charging process is restarted through the awakening operation when charging fails or is interrupted or charging needs to be continued after the vehicle is fully charged, and the charging experience and the charging success rate of a user are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of charging piles, and in particular to an automatic wake-up charging control method for a European standard charging pile. Background Art

[0002] With the popularity of electric vehicles, European standard charging piles that meet international standards are widely deployed around the world as key charging infrastructure because of their standardized interfaces and charging protocols. This type of charging pile is designed to provide convenient and efficient charging services for electric vehicles.

[0003] However, in actual applications, it is found that the existing European standard charging piles have some technical problems that affect the user's charging experience and charging efficiency:

[0004] On the one hand, the charging process may be interrupted due to occasional unstable communication between the vehicle and the charging pile or a brief technical failure at the charging pile. In this case, the vehicle may enter sleep mode, and the charging pile will stop charging and automatically complete the deduction and order termination process. If the user wants to continue charging, he must manually unplug the charging gun and reinsert it to start a new charging process.

[0005] On the other hand, in low ambient temperature, when the vehicle battery is fully charged, the vehicle control system sometimes tries to send a charging request again because the low temperature may cause the battery performance to deteriorate. However, since the charging pile has terminated the current charging session and turned off the charging function according to the preset logic, even if the vehicle has further charging needs, it cannot be met unless the user performs the operation of unplugging and replugging to restart the charging process.

[0006] The above situation significantly reduces the success rate of charging and the overall charging experience of users. In summary, the existing European standard charging piles are still insufficient in dealing with charging interruptions caused by unstable communication, temporary equipment failure or environmental factors, and urgently need to be improved to improve the quality of charging services and user experience. Summary of the invention

[0007] The technical problem to be solved by the present invention is: in view of the above-mentioned defects of the prior art, a method for automatic wake-up charging control of a European standard charging pile is provided to improve the quality of charging services and user experience.

[0008] To achieve the above object, the present invention provides a European standard charging pile automatic wake-up charging control method, the method comprising the following steps:

[0009] Step S1, the charging pile detects that the vehicle is connected, creates an order in response to the user's start charging operation, and exchanges charging-related parameters with the vehicle;

[0010] Step S2, the charging pile determines whether there is an abnormality in the charging-related parameters. If there is no abnormality, the insulation process and the pre-charging process are executed, and the charging stage is entered after the execution is completed; if the charging fails or the charging is interrupted due to an abnormality, or the charging pile receives a signal to continue charging sent by a fully charged vehicle, the charging pile performs a wake-up operation; the wake-up operation refers to the charging pile sending a vehicle disconnection simulation signal to the vehicle, and then outputting a PWM waveform to exchange charging-related parameters with the vehicle. If a response message from the vehicle is received, jump to step S2

[0011] Step S3: The charging pile stops charging the vehicle in response to a charging stop operation or detects that the charging gun is removed, performs a fee deduction operation and ends the order.

[0012] In the automatic wake-up charging control method of the European standard charging pile of the present invention, the vehicle disconnection analog signal refers to outputting a +9V DC voltage signal, a -12V DC voltage signal, and a +9V DC voltage signal in sequence on the CP signal line.

[0013] In the automatic wake-up charging control method for a European standard charging pile of the present invention, in the vehicle disconnection simulation signal, the duration of the -12V DC voltage signal is not less than 4s.

[0014] In the automatic wake-up charging control method of the European standard charging pile of the present invention, the specific method of generating the vehicle disconnection simulation signal is: controlling the hardware circuit to change the output voltage on the CP signal line through the control software on the charging pile.

[0015] The present invention has the following beneficial effects: During the charging startup process and the charging process, when charging fails, charging is interrupted, or the charging pile receives a signal to continue charging sent by a fully charged vehicle, the charging pile performs a wake-up operation by sending a vehicle disconnection simulation signal to the vehicle. Only when the user triggers a charging stop command or pulls out the charging gun, the fee is deducted and the order is ended. This solution postpones the operation of ending the order, and restarts the charging process through a wake-up operation when charging fails, is interrupted, or the vehicle needs to continue charging after being fully charged, thereby improving the user's charging experience and charging success rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 This is a schematic diagram of the normal charging CP signal changes of a European standard charging pile.

[0018] Figure 2 This is a schematic diagram of the normal charging process of a European standard charging station.

[0019] Figure 3 A schematic diagram of the steps of the automatic wake-up charging control method for a European standard charging pile provided by the present invention.

[0020] Figure 4 This is a schematic diagram of the automatic wake-up scenario provided by the present invention.

[0021] Figure 5 This is a schematic diagram of a vehicle disconnect simulation signal provided by the present invention.

[0022] Figure 6 A schematic diagram of the wake-up operation execution process provided by the present invention. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings of the specification. It should be understood that the embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0025] The automatic wake-up charging control method for a European standard charging pile provided in an embodiment of the present invention is applicable to a European standard charging pile to solve the problem that after charging of a European standard charging pile is interrupted, the charging process needs to be restarted after the gun needs to be unplugged and replugged.

[0026] like Figure 1-Figure 2The figure shows the normal charging process of the European standard charging pile in accordance with the IEC61851-1 standard. The CP signal in stage A is a +12V DC voltage signal, which represents the unplugged state; the CP signal in stage B1 is a +9V DC voltage signal, which represents the plugged state; the CP signal in stage B2 is a +9V PWM waveform, which represents the communication stage; the CP signal in stage C is a +6V PWM waveform, which represents the charging stage. First, the user connects the charging gun to the vehicle charging socket. The charging pile detects that the vehicle has been connected based on the change in the voltage level on the CP signal line. The user starts charging on the screen / APP / platform, and the charging pile immediately establishes a PWM=5% communication waveform. The vehicle and the pile exchange charging-related parameters with each other. After checking that they are correct, they enter stage C. The charging pile performs the insulation process and the pre-charging process. After the execution is completed, it enters the charging stage and outputs energy to the vehicle. At the same time, it checks in real time whether the charging information is abnormal, whether the vehicle is disconnected or full, whether the user stops, etc. After receiving the stop signal, the charging pile disconnects the +6V PWM communication waveform, and the CP signal changes to +9V, ending the order. A complete charging process is completed, waiting for the customer to unplug the gun and the next user to charge.

[0027] like Figure 3 As shown, an embodiment of the present invention provides a method for automatically waking up charging control of a European standard charging pile, the method comprising the following steps:

[0028] Step S1: The charging pile detects that the vehicle is connected, creates an order in response to the user's start charging operation, and exchanges charging-related parameters with the vehicle. Step S1 corresponds to Figure 1 The order refers to the order for the current charging of the vehicle. The charging pile creates an order and starts charging when the user starts charging.

[0029] Specifically, the charging pile detects a change in voltage on the CP signal line after the charging gun is inserted, and determines that the vehicle is connected.

[0030] In step S2, the charging pile determines whether there is an abnormality in the charging-related parameters. If there is no abnormality, the insulation process and the pre-charging process are executed, and the charging stage is entered after the execution is completed.

[0031] In step S2, if charging fails or is interrupted due to an abnormality, or the charging pile receives a signal to continue charging sent by a fully charged vehicle, the charging pile performs a wake-up operation; the wake-up operation refers to the charging pile sending a vehicle disconnection simulation signal to the vehicle, and then outputting a PWM waveform to exchange charging-related parameters with the vehicle. If a response message from the vehicle is received, jump to step S2.

[0032] like Figure 4As shown, in step S2, the situations in which wake-up is performed are divided into three categories: in the charging startup stage and the charging stage, if charging fails, charging is interrupted due to abnormal parameters, abnormal vehicle-pile communication, faults, abnormal output, etc., or the charging pile receives a recharging request sent by a fully charged vehicle, the charging pile does not perform the end order operation in the above cases, but performs the wake-up operation instead. In the communication process of the European standard charging pile, data interaction is performed on the CP line. If the signal on the CP line is interfered by the environment or the vehicle, the communication data will be lost or wrong, resulting in communication abnormality. Parameter abnormality refers to the interactive transmission of voltage, current, power and other parameters between the charging pile and the vehicle during the charging startup process or charging. If the charging pile or the charging pile determines that the parameter value is abnormal, the charging will be stopped. Output abnormality refers to the abnormal output current and voltage of the module due to unstable power grid or other reasons. Charging will also be stopped when output abnormality occurs. In the embodiment of the present invention, in the above case, the charging pile repeatedly performs the wake-up operation and tries to restart the charging process. In practical applications, the maximum number of attempts can be set to record the cause of the wake-up failure to facilitate problem location.

[0033] In the embodiment of the present invention, the vehicle disconnection analog signal refers to outputting a +9V DC voltage signal, a -12V DC voltage signal, and a +9V DC voltage signal in sequence on the CP signal line. The duration of the -12V DC voltage signal is not less than 4 seconds. Figure 5 The figure shows a preferred implementation of the vehicle disconnection simulation signal of the embodiment of the present invention. The duration of the first B1 stage (corresponding to the +9V DC voltage signal) is 3 seconds, the -12V DC voltage signal corresponds to the F state in the IEC61851-1 standard, and its duration is 4 seconds. The duration of the second B1 stage is 3 seconds. After the vehicle detects the -12V DC voltage on the CP signal line, it thinks that the gun line is disconnected. Therefore, when the PWM waveform appears on the CP line after the second B1 stage, the vehicle will restart the charging process. It is found that through the actual measurement, Figure 5 The CP signal shown can wake up European standard vehicles on the market that comply with the latest IEC61851-1 standard. For European standard vehicles that comply with the old version of the IEC61851-1 standard, successful wake-up can also be achieved by upgrading the vehicle-side firmware.

[0034] If the charging pile has not been unplugged, the voltage on the CP signal line is still 9V and cannot be changed to -12V. Specifically, the specific method of generating the vehicle disconnection simulation signal is: controlling the hardware circuit to change the output voltage on the CP signal line through the control software on the charging pile, and the hardware circuit is an existing circuit and does not need to be adjusted due to the solution of the embodiment of the present invention.

[0035] Step S3: The charging pile stops charging the vehicle in response to a charging stop operation or detects that the charging gun is removed, performs a fee deduction operation and ends the order.

[0036] The wake-up process is as follows: Figure 6 As shown. In step S2, parameter judgment is performed in stage B2. If there is no abnormality in the parameters, stage C will be entered to perform the insulation process and pre-charging stage. In stage B2, charging may fail due to various reasons such as communication abnormality, parameter abnormality, pile end failure, vehicle end failure, etc., and stage C cannot be entered. After entering stage C, charging may also fail or be interrupted due to various reasons such as communication abnormality, parameter abnormality, pile end failure, vehicle end failure, output abnormality, etc. In the prior art, when charging fails or is interrupted, the vehicle automatically enters a dormant state, and the charging pile stops the charging operation at the same time, and automatically completes the deduction and order termination process. If the user wants to continue charging, the charging gun must be manually unplugged and reinserted to start a new charging process. In an embodiment of the present invention, on the one hand, the charging pile performs the deduction operation post-position, and only when the user triggers the charging stop operation or detects the charging gun removal operation, the deduction operation is performed and the order is terminated. On the other hand, when an abnormal charging failure or charging interruption is detected at the charging pile end, a vehicle disconnection simulation signal is actively sent to the vehicle to trigger the vehicle to re-enter the charging process.

[0037] As long as the charging pile sends a vehicle disconnect simulation signal through the CP signal line once, the vehicle will consider it a new charging process. If a complete charging process stops abnormally multiple times, the charging pile will send a vehicle disconnect simulation signal multiple times in order to continue charging. The vehicle will consider it as multiple charging processes. However, for the charging pile, as long as the gun is not pulled out, all processes, even if they are interrupted, stopped and woken up multiple times, are considered one charging, for one charging order. A complete charging process can be completed without the user having to pull out the gun, which improves the user's charging experience.

[0038] If charging is interrupted due to a charging pile failure, the charging pile will perform a wake-up operation after the failure is restored. If the charging pile has not failed, the charging interruption caused by communication abnormalities, parameter abnormalities or output abnormalities will immediately trigger the charging pile to perform a wake-up operation.

[0039] If the customer does not unload the gun after the vehicle is fully charged, due to the low temperature characteristics of the battery, in winter or cold areas, some of the battery power will be consumed after a period of time. At this time, the vehicle will send a 9V->6v->9v CP signal to the charging pile to request continued charging; because the order has not yet been completed, after the charging pile detects the above CP signal sent by the vehicle, it first sends a vehicle disconnection analog signal to the vehicle, and then sends a PWM waveform to re-exchange charging parameters with the vehicle.

[0040] During the actual implementation process, the charging success rate of the orders that failed to charge was 95% after the wake-up function of the embodiment of the present invention was applied, which effectively improved the charging success rate.

[0041] The present invention has the following beneficial effects: During the charging startup process and the charging process, when charging fails, charging is interrupted, or the charging pile receives a signal to continue charging sent by a fully charged vehicle, the charging pile performs a wake-up operation by sending a vehicle disconnection simulation signal to the vehicle. Only when the user triggers a charging stop command or pulls out the charging gun, the fee is deducted and the order is ended. This solution postpones the operation of ending the order, and restarts the charging process through a wake-up operation when charging fails, is interrupted, or the vehicle needs to continue charging after being fully charged, thereby improving the user's charging experience and charging success rate.

[0042] The above are only specific implementations of the present invention, which cannot be used to limit the scope of the present invention. Equivalent changes made by ordinary technicians in this technical field based on this creation, as well as changes known to technicians in this field, should still fall within the scope of the present invention.

Claims

1. A European standard charging pile automatic wake-up charging control method, characterized in that: The method comprises the following steps: Step S1, the charging pile detects that the vehicle is connected, creates an order in response to the user's start charging operation, and exchanges charging-related parameters with the vehicle; Step S2, the charging pile determines whether there is an abnormality in the charging-related parameters. If there is no abnormality, the insulation process and the pre-charging process are executed, and the charging stage is entered after the execution is completed; if the charging fails or the charging is interrupted due to an abnormality, or the charging pile receives a signal to continue charging sent by a fully charged vehicle, the charging pile performs a wake-up operation; the wake-up operation refers to the charging pile sending a vehicle disconnection simulation signal to the vehicle, and then outputting a PWM waveform to exchange charging-related parameters with the vehicle. If a response message from the vehicle is received, jump to step S2 Step S3: The charging pile stops charging the vehicle in response to a charging stop operation or detects that the charging gun is removed, performs a fee deduction operation and ends the order.

2. The automatic wake-up charging control method for a European standard charging pile according to claim 1 is characterized in that: The vehicle disconnection analog signal refers to outputting a +9V DC voltage signal, a -12V DC voltage signal, and a +9V DC voltage signal in sequence on the CP signal line.

3. The automatic wake-up charging control method for a European standard charging pile according to claim 2 is characterized in that: In the vehicle disconnection simulation signal, the duration of the -12V DC voltage signal is not less than 4s.

4. According to the European standard charging pile automatic wake-up charging control method of claim 2, the specific method of generating the vehicle disconnection simulation signal is: controlling the hardware circuit through the control software on the charging pile to change the output voltage on the CP signal line.

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