Control method and system for charging cover of electric vehicle

Abstract

The invention discloses a control method and system for a charging cover of an electric vehicle, and the method comprises the steps: enabling a charging end system to carry out the interaction recognition with a surrounding vehicle-mounted end system after a charging gun is taken out from a charging box, and transmitting a corresponding triggering signal to the recognized vehicle-mounted end system, and the vehicle-mounted end system executes a charging cover opening action according to the trigger signal. The method has the advantages that the charging cover is controlled in an automatic induction and recognition mode, the purposes of automatic control and recognition are achieved, and the user experience and the automation degree are improved.

Description

Technical Field

[0001] The present invention relates to the field of intelligent control of automobile charging, and in particular to a control system and method for a charging cover of an electric vehicle. Background Art

[0002] With the development of the times, cars have become the basic means of transportation for people's daily travel. The popularity of cars is increasing, and the car market is becoming more and more saturated. The competition among major automobile manufacturers is becoming increasingly fierce, especially with the update, iteration and upgrade of automobile technology. Hybrid cars and pure electric cars account for an increasingly higher proportion in users' car purchases.

[0003] Under this circumstance, major automobile manufacturers will focus on improving customer perception and technological sense to enhance the market competitiveness of their products. Charging demand has become the most common demand of users during the use of electric vehicles. At present, all electric vehicle charging ports on the market are manually unlocked, and the charging port cover is manually opened and the charging gun is picked up for charging. There is no sense of technology, and it is easy to dirty the hands of users on rainy days.

[0004] In the prior art, the manual opening includes mechanical pressing to open and close the charging cover and touch to electrically open and close the charging cover. No matter which method is used, it is impossible to accurately identify the charging demand and automatically open and close the charging cover, which affects the user experience. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a control system and method for an electric vehicle charging cover, which controls the charging cover by automatic sensing and recognition, thereby achieving the purpose of automatic control and recognition and improving user experience and automation.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a method for controlling a charging cover of an electric vehicle, after the charging gun is taken out of the charging box, the charging end system interacts with the surrounding vehicle-mounted end systems to identify each other, and then sends a corresponding trigger signal to the identified vehicle-mounted end system, and the vehicle-mounted end system executes the charging cover opening action according to the trigger signal.

[0007] When the charging end system detects that the charging gun is in the charging box, the charging end system is in a dormant or standby working state; when the charging gun is taken out of the charging box, the charging end system is triggered to start working and start interactive identification and send out an induction pulse after the interactive identification is successful. The induction pulse is used to trigger the vehicle-mounted control system to start the charging cover control program.

[0008] The vehicle-mounted control system uses the KL15 signal as the trigger signal for starting the work. When the vehicle KL15 signal is in the OFF state, the vehicle-mounted control system is triggered from the sleep or standby state to the start state; otherwise, the vehicle-mounted control system is kept in the sleep state or standby state; the vehicle-mounted control system interacts with the charging end system and controls the charging cover state only in the start state.

[0009] After starting the charging cover control program, the vehicle-mounted control system and the charging-end system judge the distance based on the signal strength during interactive control. When the distance between the charging gun and the charging port becomes smaller and is less than the set distance threshold, the vehicle-mounted control system drives the charging cover to open. After charging is completed, when the distance between the charging gun and the charging port gradually increases and is greater than the set distance threshold, the vehicle-mounted control system controls the charging cover to close.

[0010] When the vehicle-mounted control system drives the charging cover to close, anti-pinch monitoring is performed in real time. When it is detected that the charging cover encounters an obstacle during the opening or closing process, the opening or closing of the charging cover is stopped.

[0011] After detecting that the charging gun is removed from the charging box or charging pile, the charging end system sends wireless signals to the surrounding area, identifies the vehicle-mounted control system within the communication range and establishes a communication connection; the charging end system interacts with each vehicle-mounted control system within the communication range to identify the identity, and identifies one of them as a matching vehicle-mounted control system. The charging end system sends an induction pulse to the matching vehicle-mounted control system.

[0012] An identity identification ID is pre-set in the vehicle-mounted control system and the charging-end system, and the matching vehicle-mounted control system is identified by means of the identity identification ID; or the matching vehicle-mounted control system is judged by the change in the signal strength of the vehicle-mounted control system within the communication range of the charging-end system. When the charging gun is taken out, the signal strength of the vehicle-mounted control systems within the communication range received by the charging-end system gradually increases, and the vehicle-mounted control system with the largest signal strength is regarded as the matching vehicle-mounted control system.

[0013] The vehicle-mounted system detects the insertion status of the charging gun after controlling the charging cover to open. If the charging gun is not inserted within the set time threshold, the charging cover is controlled to return to the closed state.

[0014] A control system for an electric vehicle charging cover, comprising a charging end system and a vehicle-mounted end control system; wherein the charging end system is arranged in a charging hood, and the vehicle-mounted end control system is arranged in a vehicle;

[0015] When the charging gun moves from the charging box to the vehicle or when charging is completed, the charging end system interacts with the vehicle-mounted control system to control the opening and closing of the charging cover.

[0016] The charging end system collects the plug-in status of the charging gun through the charging gun status collection module. When it is detected that the charging gun is in the charging box, the charging end system is in a dormant or standby working state; when the charging gun is taken out of the charging box, the charging end system is triggered to start working.

[0017] The advantages of the present invention are: the charging cover is controlled by automatic sensing and recognition, achieving the purpose of automatic control and recognition, improving user experience and automation. The charging port cover automatically opens when the charging gun approaches, and the automation is improved during the charging process to enhance the high-tech sense and competitiveness of automobile products, freeing both hands and realizing automatic and intelligent charging cover opening control. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following is a brief description of the contents expressed in the drawings of the present invention and the symbols in the drawings:

[0019] Figure 1 It is a structural principle diagram of the control system of the present invention. DETAILED DESCRIPTION

[0020] The specific implementation of the present invention will be further explained in detail below by describing the optimal embodiment with reference to the accompanying drawings.

[0021] This embodiment designs a control system and strategy for automatically sensing and opening the charging port cover of the vehicle during charging. The charging end system set in the charging gun forms an inductive interaction with the vehicle-mounted control system installed at the charging port cover position through wireless communication, thereby controlling the charging port cover to automatically open, realizing automatic control of the charging gun approaching the charging port cover to enhance the technological sense of the automobile product.

[0022] In this embodiment, a position sensor is added to the charging gun as a sensor to trigger the system, and weak current is supplied through the charging gun. The sensor needs to communicate with the charging box. When it senses that the charging gun has not been taken out of the charging box, the induction pulse output by the charging end system is in a dormant state. When it senses that the charging gun is taken out of the charging box, it indicates that the user is about to enter the charging process. The induction pulse is activated when it is taken out. Since the process from the user taking out the charging gun to inserting it into the charging port is extremely short, this sensor needs to release the induction pulse all the time to trigger the charging port cover control program on the car. This achieves the effect of extremely low power consumption when not charging and real-time sensing during the charging process.

[0023] The car charging port cover adds a sensing system and control system, that is, the vehicle-mounted control system. For charging safety considerations, the vehicle should be in a power-off state when charging, so this control system needs to have a judgment mechanism. Here, the KL15 signal state is used as the basis for judgment (or other vehicle power-off signals replace the KL15 signal). When the vehicle is in the KL15 OFF state, the control system starts, and at the same time, the vehicle charging port cover senses the position signal of the charging gun. When it senses that the charging gun is a certain distance away from the charging port cover (this distance can be calibrated according to the actual vehicle), the control system is triggered. At this time, the control system sends an opening command to the charging port cover opening motor, so that the charging port cover automatically opens.

[0024] When the charging gun is pulled out after charging is completed, the sensor senses that the charging gun is a certain distance away from the charging port cover (this distance can be calibrated according to the actual vehicle) and triggers the control system. At this time, the control system sends a closing command to the charging port cover motor, causing the charging port cover to close automatically.

[0025] On this basis, we can also develop a mechanism to prevent pinching when the charging port cover is closed, making it safer to close, thus creating a high-end sense of charging. Since the charging cover is driven by a motor, the current sensor can be set to obtain the motor's stall current signal to determine whether the anti-pinch mechanism is triggered. When the anti-pinch mechanism is triggered, the charging port cover is controlled to pause opening or closing or return to its initial state.

[0026] The charging gun determines whether it is out of the charging box and determines the frequency of pulse release to minimize power consumption. The vehicle charging port position sensor senses the position of the charging gun and sends a real-time position signal to the control system. The control system makes a judgment based on the vehicle power-off signal and the position signal of the charging gun. When the set conditions are met, the control system sends an opening command to the charging port cover drive motor, thereby realizing the automatic opening function of the charging port cover. When charging is completed, the vehicle charging port position sensor senses the position of the charging gun and sends a real-time position signal to the control system. The control system makes a judgment based on the position signal and sends a closing command to the charging port cover drive motor, thereby realizing the automatic closing function of the charging port cover.

[0027] like Figure 1 As shown, the control system of the electric vehicle charging port cover provided in this embodiment includes a charging end system and a vehicle-mounted end control system; wherein the charging end system is arranged in the charging cradle, and the vehicle-mounted end control system is arranged in the vehicle, and preferably the vehicle-mounted end control system is arranged in the charging port cover or on the vehicle body near the charging port;

[0028] When the charging gun moves from the charging box to the vehicle or when charging is completed, the charging end system interacts with the vehicle-mounted control system to control the opening and closing of the charging cover.

[0029] In order to realize the opening and closing control of the charging port cover, the charging port cover should be designed to be electrically adjusted, that is, the opening and closing of the charging port cover is adjusted by driving the motor of the charging port cover.

[0030] The charging end system collects the plug-in and unplug status of the charging gun through the charging gun status acquisition module. When it is detected that the charging gun is in the charging box, the charging end system is in a dormant or standby working state; when the charging gun is taken out of the charging box, the charging end system is triggered to start working. Under normal circumstances, the charging gun is placed in the charging box or on the charging pile, so the status of the charging gun is collected through the charging gun status acquisition module. The charging gun status acquisition module can collect the insertion status of the charging gun to obtain whether the charging gun is on the charging box or charging pile, or communicate with the charging pile or charging box through the charging gun status acquisition module to obtain the status of the charging gun detected inside.

[0031] The charging end system includes a core controller, a wireless signal transmitter and receiver, and a charging status acquisition module. The charging status acquisition module is connected to the core controller, and the core controller is connected to the wireless signal transceiver. The communication signal is sent through the wireless signal transceiver to realize a communication network within a certain range around the wireless signal transceiver, which can realize communication interaction and control with the vehicle-mounted control system.

[0032] The vehicle-mounted control system includes a vehicle-mounted controller, a wireless signal transceiver, and a motor driver. The vehicle-mounted control system is powered by the vehicle power supply system; the vehicle-mounted controller is connected to the wireless signal transceiver, and communication, interaction and control with the external charging end system are established through the wireless signal transceiver; the output end of the vehicle-mounted controller is connected to the motor driver, and the charging port cover motor is driven by the motor driver to realize the opening and closing of the charging port cover.

[0033] The control method of the charging port cover control system based on the above embodiment includes: collecting the status of the charging gun through the status sensor of the charging gun, identifying whether the charging gun is taken out from the charging box / charging pile, and when it is taken out from a stolen charging box, it means that the user operates the charging gun and has a charging demand. Therefore, after the charging gun is taken out from the charging box, the charging end system interacts with the surrounding vehicle-mounted end systems for identification, and then sends a corresponding trigger signal to the identified vehicle-mounted end system, and the vehicle-mounted end system executes the charging cover opening action according to the trigger signal.

[0034] When the charging end system detects that the charging gun is in the charging box, the charging end system is in a dormant or standby working state, which can reduce unnecessary power consumption;

[0035] When the charging gun is taken out of the charging box, the charging end system is triggered to start working and start interactive identification and send out an induction pulse after successful interactive identification. The induction pulse is used to trigger the vehicle-mounted control system to start the charging cover control program. During the interactive identification process, a matching vehicle-mounted control system will be identified, and then a pulse signal will be sent to the vehicle-mounted control system to start the charging cover control program. After the charging cover control program is started, it is determined whether the conditions are met through identification. When the conditions are met, the opening of the charging port cover can be controlled.

[0036] The vehicle-mounted control system will only work after the vehicle stops and the power is turned off, otherwise it will always be in a dormant or standby state, which can reduce energy consumption when charging is not needed; it only works after the power is turned off, because it can meet the charging needs when the power is turned off, and it cannot charge in other cases, so the vehicle-mounted control system does not need to work, thereby saving energy consumption and avoiding the impact of functions on battery life. Specifically, the KL15 signal can be used as a power-off signal to control the operation of the vehicle-mounted system, that is, the vehicle-mounted control system uses the KL15 signal as a trigger signal for starting the work. When the vehicle KL15 signal is in the OFF state, the vehicle-mounted control system is triggered from the dormant or standby state to the start state; otherwise, the vehicle-mounted control system is kept in a dormant or standby state; the vehicle-mounted control system only interacts with the charging end system and controls the charging cover state in the start state, and no control signal will be output in the dormant or standby state, so the reliability of control can be achieved.

[0037] After starting the charging cover control program, the vehicle-mounted control system and the charging end system judge the distance according to the signal strength during interactive control. Since the vehicle-mounted control system is set on the vehicle and can even be set near the charging port cover or the charging port, and the charging end system is set in the charging gun, the strength of the wireless signal represents the distance between the charging gun and the charging port. The quantitative test of the distance is achieved through the signal strength RSS I, and then the distance between the charging gun and the charging port cover is used to determine whether to open the charging port cover, that is, when the distance between the charging gun and the charging port becomes smaller and is less than the set distance threshold, the vehicle-mounted control system drives the charging cover to open; after the charging is completed, the CC and CP signals of the charging base are taken out to determine whether the charging gun is closed. Closing the gun means the charging is completed. When it is detected that the distance between the charging gun and the charging port gradually increases and is greater than the set distance threshold, the vehicle-mounted control system controls the charging cover to close.

[0038] In a preferred embodiment, an anti-pinch mechanism for opening and closing the charging port cover is provided to avoid damage to the charging port cover. Anti-pinch monitoring is performed in real time during the process of driving the charging port cover to close by the vehicle-mounted control system. When it is detected that the charging port cover encounters an obstacle during the opening or closing process, the opening or closing of the charging port cover is stopped. By clicking on the detection of the stall current, it is possible to determine whether there is an object blocking the opening or closing of the charging port cover, because the obstruction will cause the motor current to change. The stall is determined by current detection, and then it is determined that there is an obstacle. At this time, it is necessary to stop the continued control of the charging port cover to open or close. The stall current signal of the motor can be collected by the current sensor. After the opening or closing of the charging port cover is stopped due to the stall, the action of the charging port cover is delayed to resume, and the opening or closing action before the stall is continued, and the unfinished opening and closing control of the charging port cover is continued. During the delay process, if the user eliminates the obstacle, it can continue to open or close.

[0039] Furthermore, since the charging gun and the charging vehicle need to be identified before the charging port cover can be opened, in order to avoid a charging gun mistakenly opening multiple charging port covers, resulting in defects such as low automatic control accuracy, a charging end system is set to interact with only one vehicle-mounted control system at the same time to control the charging port cover; the two need to interact and match before controlling the charging port cover, and the interaction and matching control method includes:

[0040] After detecting that the charging gun is removed from the charging box or charging pile, the charging end system sends wireless signals to the surrounding area, identifies the vehicle-mounted control system within the communication range and establishes a communication connection; the charging end system interacts with each vehicle-mounted control system within the communication range to identify the identity, and identifies one of them as a matching vehicle-mounted control system. The charging end system sends an induction pulse to the matching vehicle-mounted control system.

[0041] When the vehicle is at a private charging pile, the identity ID between the private charging pile and the vehicle can be preset to identify whether the vehicle-mounted control system and the charging end system of the current vehicle match. Only when they match can the charging port cover be opened and closed automatically through the vehicle-mounted control system. The solution is as follows;

[0042] The vehicle-mounted control system and the charging-end system are pre-set with identity identification IDs, and the matching vehicle-mounted control system is identified by means of the identity identification ID.

[0043] For public charging stations, charging piles and other charging areas, since it is impossible to achieve one-to-one or preset identity ID, in order to accurately identify the match between the charging gun and the corresponding charging vehicle, the matching scheme includes: judging the matching vehicle-end control system by the change in the signal strength of the vehicle-end control system within the communication range of the charging end system, when the charging gun is taken out, the vehicle-end control system with the largest signal strength among the vehicle-end control systems within the communication range received by the charging end system is gradually increased. As the matching vehicle-end control system. All vehicle-end control systems within the communication range of the charging end system are taken as the first step, and then after the charging gun is taken out from the charging pile or charging box, the communication signal strength with each vehicle-end control system within the communication range is obtained in real time, and the vehicle-end control system with the signal strength gradually increasing and the signal strength is the largest is selected as the matching vehicle-end control system. The vehicle corresponding to this system is the vehicle that the user is going to charge. Therefore, when charging, the charging gun will gradually approach the charging port and stay away from the charging ports of other vehicles. Therefore, the target charging vehicle is accurately identified in the way with the largest signal strength, thereby realizing accurate opening and closing of the charging port cover. In this solution, the interaction between the vehicle-mounted system and the charging end system is realized through a wireless signal transceiver. The signal sent by the wireless signal transceiver has a certain strength. The farther the distance, the smaller the strength. Therefore, it can be judged by the signal RSS I. The wireless signal transceiver can be realized by Bluetooth, low-frequency signal transmitter, etc.

[0044] The vehicle-mounted system detects the insertion status of the charging gun after controlling the charging cover to open. If the charging gun is not inserted within the set time threshold, the charging cover is controlled to return to the closed state to avoid the situation where the charging port cover is open without charging for a long time, thereby protecting the charging port.

[0045] Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. A control method for an electric vehicle charging cover, characterized in that: After the charging gun is taken out of the charging box, the charging end system interacts with the surrounding vehicle-mounted end systems for identification, and then sends a corresponding trigger signal to the identified vehicle-mounted end system, which then opens the charging cover according to the trigger signal.

2. A control method for an electric vehicle charging cover as claimed in claim 1, characterized in that: When the charging end system detects that the charging gun is in the charging box, the charging end system is in a dormant or standby working state; when the charging gun is taken out of the charging box, the charging end system is triggered to start working and start interactive identification and send out an induction pulse after the interactive identification is successful. The induction pulse is used to trigger the vehicle-mounted control system to start the charging cover control program.

3. A control method for an electric vehicle charging cover as claimed in claim 2, characterized in that: The vehicle-mounted control system uses the KL15 signal as the trigger signal for starting the work. When the vehicle KL15 signal is in the OFF state, the vehicle-mounted control system is triggered from the sleep or standby state to the start state; otherwise, the vehicle-mounted control system is kept in the sleep state or standby state; the vehicle-mounted control system interacts with the charging end system and controls the charging cover state only in the start state.

4. A control method for an electric vehicle charging cover as claimed in claim 3, characterized in that: After starting the charging cover control program, the vehicle-mounted control system and the charging end system judge the distance based on the signal strength during interactive control. When the distance between the charging gun and the charging port becomes smaller and is less than the set distance threshold, the vehicle-mounted control system drives the charging cover to open. After charging is completed, when the distance between the charging gun and the charging port gradually increases and is greater than the set distance threshold, the vehicle-mounted control system controls the charging cover to close.

5. A control method for an electric vehicle charging cover as claimed in claim 4, characterized in that: When the vehicle-mounted control system drives the charging cover to close, anti-pinch monitoring is performed in real time. When it is detected that the charging cover encounters an obstacle during the opening or closing process, the opening or closing of the charging cover is stopped.

6. A control method for an electric vehicle charging cover as described in any one of claims 1 to 5, characterized in that: After detecting that the charging gun is removed from the charging box or charging pile, the charging end system sends wireless signals to the surrounding area, identifies the vehicle-mounted control system within the communication range and establishes a communication connection; the charging end system interacts with each vehicle-mounted control system within the communication range to identify the identity, and identifies one of them as a matching vehicle-mounted control system. The charging end system sends an induction pulse to the matching vehicle-mounted control system.

7. A control method for an electric vehicle charging cover as claimed in claim 6, characterized in that: An identity identification ID is pre-set in the vehicle-mounted control system and the charging-end system, and the matching vehicle-mounted control system is identified by means of the identity identification ID; or the matching vehicle-mounted control system is judged by the change in the signal strength of the vehicle-mounted control system within the communication range of the charging-end system. When the charging gun is taken out, the signal strength of the vehicle-mounted control systems within the communication range received by the charging-end system gradually increases, and the vehicle-mounted control system with the largest signal strength is regarded as the matching vehicle-mounted control system.

8. A control method for an electric vehicle charging cover according to any one of claims 1 to 7, characterized in that: The vehicle-mounted system detects the insertion status of the charging gun after controlling the charging cover to open. If the charging gun is not inserted within the set time threshold, the charging cover is controlled to return to the closed state.

9. A control system for an electric vehicle charging cover, characterized in that: It includes a charging end system and a vehicle-mounted end control system; wherein the charging end system is arranged in a charging cradle, and the vehicle-mounted end control system is arranged in a vehicle; When the charging gun moves from the charging box to the vehicle or when charging is completed, the charging end system interacts with the vehicle-mounted control system to control the opening and closing of the charging cover.

10. A control system for an electric vehicle charging cover as claimed in claim 9, characterized in that: The charging end system collects the plug-in status of the charging gun through the charging gun status collection module. When it is detected that the charging gun is in the charging box, the charging end system is in a dormant or standby working state; when the charging gun is taken out of the charging box, the charging end system is triggered to start working.

Images