A control method and system of an electric vehicle charging cover

Abstract

The application discloses a control method and system of an electric vehicle charging cover. After a charging gun is taken out from a charging box, a charging end system and a surrounding vehicle-mounted end system are interactively identified, and then a corresponding trigger signal is sent to the identified vehicle-mounted end system, and the vehicle-mounted end system executes a charging cover opening action according to the trigger signal. The application has the advantages that the control of the charging cover is realized through automatic induction and identification, the purposes of automatic control and identification are achieved, and the user experience and the degree of automation are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of intelligent control of automobile charging, and particularly relates to a control system and method for a charging cover of an electric vehicle. BACKGROUND

[0002] With the development of the times, nowadays, automobiles have become the basic means of transportation for people's daily travel, and the popularity of automobiles is increasing, which leads to the saturation of the automobile market and the increasingly fierce competition among automobile manufacturers. In particular, the update and iteration of automobile technology, hybrid electric vehicles and pure electric vehicles are becoming more and more popular among users.

[0003] Under this circumstance, automobile manufacturers focus on improving customer perception and technological sense to improve the market competitiveness of products. The charging demand of electric vehicles during use is the most frequently used demand for users. At present, all electric vehicle charging ports on the market use manual unlocking, manually opening the charging port cover, and picking up the charging gun to charge. There is no sense of technology, and it is easy to dirty the user's hands in the rain.

[0004] In the prior art, manual opening includes mechanical pressing to open and close the charging cover and touch control to electrically open and close the charging cover. Neither of the two methods can accurately identify the charging demand and automatically open and close the charging cover, which affects the user experience. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provide a control system and method for a charging cover of an electric vehicle. The control of the charging cover is realized by automatic sensing and identification, which achieves the purpose of automatic control and identification, improves the user experience and the degree of automation.

[0006] To achieve the above purpose, the technical solution adopted by the present application is as follows: a control method for 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 system for identification, and then sends a corresponding trigger signal to the identified vehicle-mounted system. The vehicle-mounted 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 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 an induction pulse is sent 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 end control system uses KL15 signal as a trigger signal for starting work, and when the KL15 signal of the vehicle is in OFF state, the vehicle-mounted end control system is triggered from a dormant or standby state to a starting state; otherwise, the vehicle-mounted end control system remains in the dormant or standby state; the vehicle-mounted end control system only interacts with the charging end system and controls the charging cover state in the starting state.

[0009] After starting the charging cover control program, the vehicle-mounted end control system and the charging end system judge the distance according to the signal strength when interacting and controlling, and when the distance between the charging gun and the charging port becomes smaller and is less than a set distance threshold, the vehicle-mounted end control system drives the charging cover to open, and when the distance between the charging gun and the charging port gradually becomes larger and is greater than the set distance threshold after the charging is completed, the vehicle-mounted end control system controls the charging cover to close.

[0010] The vehicle-mounted end control system performs real-time anti-pinch monitoring during the process of driving the charging cover to close, and stops opening or closing the charging cover when an obstacle is detected during the opening or closing process of the charging cover.

[0011] After detecting that the charging gun is removed from the charging box or charging pile, the charging end system sends a wireless signal to the surrounding and identifies the vehicle-mounted end control system within the communication range and establishes a communication connection; the charging end system and each vehicle-mounted end control system within the communication range perform identity interaction identification, and one of them is identified as a matched vehicle-mounted end control system, and the charging end system sends an induction pulse to the matched vehicle-mounted end control system.

[0012] The vehicle-mounted end control system and the charging end system are pre-provided with an identity identification ID, and the matched vehicle-mounted end control system is identified through the identity identification ID; or the matched vehicle-mounted end control system is judged through the change of the signal strength of the vehicle-mounted end control system within the communication range of the charging end system, and when the charging gun is removed, the vehicle-mounted end control system with the largest signal strength in the vehicle-mounted end control system within the communication range gradually becomes larger and is identified as the matched vehicle-mounted end control system.

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

[0014] A control system of 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 the charging gun, and the vehicle-mounted end control system is arranged in the vehicle.

[0015] During the movement of the charging gun from the charging box to the vehicle or the movement of the charging gun from the charging box to the charging box after the charging is completed, the charging end system and the vehicle-mounted end control system interact to control the opening and closing of the charging cover.

[0016] The charging end system acquires the plug-in state of the charging gun through a charging gun state acquisition module, and 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 advantage of the present application is that the control of the charging cover is realized through automatic induction recognition, achieving the purpose of automatic control and recognition, improving user experience and the degree of automation. The charging port cover is automatically opened when the charging gun approaches, and the automatic charging process is used to improve the high-tech feel and competitiveness of the automobile product, which can free the hands and realize the automatic and intelligent opening control of the charging cover. BRIEF DESCRIPTION OF DRAWINGS

[0018] The content expressed by each figure in the specification of the present application and the marks in the figures are briefly described as follows:

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

[0020] The specific embodiments of the present application are further described in detail by comparing the figures and describing the optimal embodiments.

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

[0022] In the present embodiment, a position sensor is added to the charging gun as a sensor for triggering the system to work, and the charging gun is powered by weak current. The sensor needs to communicate with the charging box. When it is sensed that the charging gun is not taken out of the charging box, the induction pulse output by the charging end system is in a dormant state. When it is sensed 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 at the moment of taking out. Since the process from taking the charging gun to inserting it into the charging port is very short, the sensor needs to release the induction pulse for triggering the charging port cover control program on the automobile at all times. Thus, the power consumption is very small when not charging, and the effect of real-time induction during charging is achieved.

[0023] The automobile charging port cover increases the induction system and the control system, that is, the vehicle-mounted end control system. For charging safety consideration, the vehicle should be in a powered-off state when charging. Therefore, the control system needs a judgment mechanism. Here, the KL15 signal state is used as the judgment basis (or other vehicle power-off signals instead of the KL15 signal). When the vehicle is in the KL15 OFF state, the control system starts, and the vehicle charging port cover senses the charging gun position signal. When the charging gun is sensed to be 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 instruction to the charging port cover motor, so that the charging port cover is automatically opened.

[0024] When the charging is completed and the charging gun is pulled out, 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 the control system is triggered. At this time, the control system sends a closing instruction to the charging port cover motor, so that the charging port cover is automatically closed.

[0025] On this basis, a charging port cover closing anti-pinch judgment mechanism can also be developed to make closing safer and thus create a high-end feeling for charging. Since the control of the charging cover is driven by a motor, the anti-pinch mechanism can be triggered by setting a current sensor to obtain the motor's locked-rotor current signal. When the anti-pinch mechanism is triggered, the control of the charging port cover is suspended, or the charging port cover is closed or restored to the initial state.

[0026] The charging gun judges whether it is separated from the charging box to determine the pulse release frequency, thereby minimizing power consumption. The vehicle charging port position sensor senses the charging gun position and sends a position signal to the control system in real time. The control system judges in combination with the vehicle power-off signal and the charging gun position signal. When the set conditions are met, the control system sends an opening instruction to the charging port cover drive motor, thereby realizing the automatic opening function of the charging port cover. After charging is completed, the vehicle charging port position sensor senses the charging gun position and sends a position signal to the control system in real time. The control system judges according to the position signal and sends a closing instruction to the charging port cover drive motor, thereby realizing the automatic closing function of the charging port cover.

[0027] As shown in Figure 1 The control system of the electric vehicle charging port cover provided by the embodiment includes a charging end system and a vehicle-mounted end control system. The charging end system is arranged in the charging gun, and the vehicle-mounted end control system is arranged in the vehicle. Preferably, the vehicle-mounted end control system is arranged in the charging port cover or on the vehicle body near the charging port.

[0028] During the movement of the charging gun from the charging box to the vehicle or the movement of the charging gun from the vehicle to the charging box after charging is completed, the charging end system and the vehicle-mounted end control system interact 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 in an electrically adjustable manner, that is, the opening and closing of the charging port cover is adjusted by means of a charging port cover driving motor.

[0030] The charging end system acquires the plug-in state of the charging gun through the charging gun state 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 at this time. When the charging gun is taken out of the charging box, the charging end system is triggered to start working. Normally, the charging gun is placed in the charging box or on the charging pile, so the state of the charging gun is acquired through the charging gun state acquisition module. The charging gun state acquisition module can acquire the insertion state of the charging gun to obtain whether the charging gun is on the charging box or the charging pile or acquire the state of the charging gun detected by the charging gun state acquisition module and the charging pile or the charging box through communication.

[0031] The charging end system includes a core controller, a wireless signal transceiver, and a charging state acquisition module. The charging state acquisition module is connected with the core controller, and the core controller is connected with the wireless signal transceiver. The wireless signal transceiver is used to send communication signals to realize a communication network within a certain range around the wireless signal transceiver, so as to 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 whole vehicle power supply system. The vehicle-mounted controller is connected with the wireless signal transceiver to establish communication interaction and control with the external charging end system through the wireless signal transceiver. The output end of the vehicle-mounted controller is connected to the motor driver to drive the charging port cover motor, thereby realizing the opening and closing of the charging port cover.

[0033] Based on the control method of the charging port cover control system in the above embodiment, the state of the charging gun is acquired through the state sensor of the charging gun to identify whether the charging gun is taken out of the charging box / charging pile. When the charging gun is taken out of the 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 of the charging box, the charging end system interacts with the surrounding vehicle-mounted control system, and then sends a corresponding trigger signal to the identified vehicle-mounted control system. The vehicle-mounted control 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 at this time, 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 a sensing pulse after successful interactive identification, which is used to trigger the start of the charging cover control program of the vehicle-mounted control system. In the interactive identification process, a matching vehicle-mounted control system is identified, and then a pulse signal is 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, and the charging port cover is opened when the conditions are met.

[0036] The vehicle-mounted control system works only after the vehicle is parked and powered off, otherwise it is always in a dormant or standby state, which can reduce energy consumption when charging is not needed. It only works after power-off because the power-off state meets the charging requirement, and in other cases, the vehicle-mounted control system does not need to work, thereby saving energy consumption and avoiding the impact of function on the endurance. Specifically, KL15 signal can be used as a power-off signal to control the working of the vehicle-mounted control system. The vehicle-mounted control system uses KL15 signal as a trigger signal to start working. When the vehicle KL15 signal is OFF, the vehicle-mounted control system is triggered from a dormant or standby state to a start state. Otherwise, the vehicle-mounted control system remains 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 does not output control signals in the dormant or standby state, which can achieve reliable control.

[0037] After starting the charging cover control program, the vehicle-mounted control system and the charging end system interact and control according to the signal strength to determine the distance. Since the vehicle-mounted control system is set on the vehicle or even near the charging port cover or 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 signal strength rss i is used to quantitatively test the distance, and then the distance between the charging gun and the charging port cover is used to determine whether to open the charging port cover. 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 seat are taken out to determine whether the charging gun is taken out. 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.

[0038] In a preferred embodiment, an anti-pinch mechanism is provided for opening and closing the charging port cover to avoid damage to the charging port cover. Real-time anti-pinch monitoring is performed during the process of closing the charging cover driven by the on-board end control system. When an obstacle is detected during the opening or closing process of the charging cover, the opening or closing of the charging cover is stopped. The detection of the blocking of the opening or closing process of the charging port cover is realized by detecting the locked-rotor current. Because the blocking will cause a change in the motor current, the locked-rotor is detected by current detection, and then it is determined that there is an obstacle. At this time, the control of the opening or closing of the charging port cover needs to be stopped. The locked-rotor current signal of the motor can be collected by a current sensor. After stopping the opening or closing of the charging port cover due to locked-rotor, the action of the charging port cover is delayed to continue the opening or closing action before the locked-rotor to complete the unfinished opening and closing control of the charging port cover. During the delay process, if the user removes the obstacle, the opening or closing can continue.

[0039] Further, since the charging gun and the charging vehicle need to be identified before the charging port cover can be opened, to avoid the problem of a charging gun mistakenly opening multiple charging port covers, causing low accuracy of automatic control and other defects, a charging end system is set to interact with only one on-board end control system at the same time to control the charging port cover. Both need to interact and match before controlling the charging port cover. The interaction and matching control method includes:

[0040] After the charging end system detects that the charging gun is removed from the charging box or charging pile, it sends a wireless signal to the surrounding and identifies the on-board end control system within the communication range and establishes a communication connection. The charging end system and each on-board end control system within the communication range interact and identify the identity. One of them is identified as a matching on-board end control system. The charging end system sends a sensing pulse to the matching on-board end control system.

[0041] When the vehicle is at a private charging pile, whether the on-board end control system of the current vehicle and the charging end system match can be identified by pre-setting the identity ID between the private charging pile and the vehicle. Only when they match, the charging port cover can be automatically opened and closed by the on-board end control system. The scheme is as follows:

[0042] The on-board end control system and the charging end system are pre-set with an identity recognition ID to identify the matching on-board end control system through the identity recognition ID.

[0043] For the charging area of public charging station, charging pile and the like, since one-to-one cannot be realized or identity ID cannot be preset, in order to accurately identify the matching between the charging gun and the corresponding charging vehicle, the matching scheme includes: judging the matched vehicle-mounted control system through the change of 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 vehicle-mounted control system with gradually increasing signal strength and the largest signal strength within the communication range received by the charging end system is taken as the matched vehicle-mounted control system. All vehicle-mounted control systems within the communication range of the charging end system are taken as the first step, then after the charging gun is taken out from the charging pile or charging box, the communication signal strength of each vehicle-mounted control system within the communication range is respectively acquired in real time, the vehicle-mounted control system with gradually increasing signal strength and the largest signal strength is taken as the matched vehicle-mounted control system, the vehicle corresponding to the system is the vehicle to be charged by the user, therefore the charging gun will gradually approach the charging port and be away from the charging port of other vehicles during charging, therefore the largest signal strength mode accurately identifies the target charging vehicle, so as to realize the accurate opening and closing of the charging port cover. The interaction between the vehicle-mounted system and the charging end system in the scheme is realized through the wireless signal transceiver, the signal emitted by the wireless signal transceiver has a certain strength, the farther the distance, the smaller the strength, therefore the signal rss i can be used for judgment. The wireless signal transceiver can adopt Bluetooth, low-frequency signal transmitter and the like to realize.

[0044] The vehicle-mounted system detects the insertion state of the charging gun after controlling the charging cover to be opened, if the charging gun is not inserted within the set time threshold, the charging cover is controlled to return to the closed state, so as to avoid the situation that the charging port cover is opened for a long time without charging, and to protect the charging port.

[0045] Obviously, the specific implementation of the present application is not limited by the above-mentioned manner, as long as various non-essential improvements are made by adopting the method concept and technical scheme of the present application, they are within the protection scope of the present application.

Claims

1. A control method of an electric vehicle charging cover, characterized by: The charging end system interacts with the surrounding vehicle-mounted end system after the charging gun is taken out from the charging box, 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; the charging end system is in a dormant or standby working state when detecting that the charging gun is in the charging box; when the charging gun is taken out from the charging box, the charging end system is triggered to start working and start interactive identification, and an induction pulse is sent after the interactive identification is successful, the induction pulse is used to trigger the start of the charging cover control program of the vehicle-mounted end control system; the vehicle-mounted end control system uses the KL15 signal as a trigger signal to start working, and when the vehicle KL15 signal is in the OFF state, the vehicle-mounted end control system is triggered from the dormant or standby state to the start state; otherwise, the vehicle-mounted end control system remains in the dormant or standby state; the vehicle-mounted end control system only interacts with the charging end system and controls the charging cover state in the start state; after the charging cover control program is started, the vehicle-mounted end control system and the charging end system judge the distance according to the signal strength when interacting and controlling, when the distance between the charging gun and the charging port becomes smaller and is less than the set distance threshold, the vehicle-mounted end control system drives to control the charging cover to open, and when the distance between the charging gun and the charging port gradually becomes larger and is greater than the set distance threshold after the charging is completed and the gun is pulled out, the vehicle-mounted end control system controls the charging cover to close.

2. The control method of an electric vehicle charging cover according to claim 1, characterized in that: Real-time anti-pinch monitoring is performed during the process of driving the charging cover to close by the vehicle-mounted end control system, and when an obstacle is detected during the opening or closing process of the charging cover, the opening or closing of the charging cover is stopped.

3. The control method of an electric vehicle charging cover according to claim 1 or 2, characterized in that: After detecting that the charging gun is taken out from the charging box or the charging pile, the charging end system sends a wireless signal to the surrounding and identifies the vehicle-mounted end control system within the communication range and establishes a communication connection; the charging end system and each vehicle-mounted end control system within the communication range interact with each other to identify the identity, and one of them is identified as the matched vehicle-mounted end control system, and the charging end system sends an induction pulse to the matched vehicle-mounted end control system.

4. The control method of an electric vehicle charging cover according to claim 3, characterized in that: The vehicle-mounted end control system and the charging end system are pre-provided with an identity identification ID, and the matched vehicle-mounted end control system is identified through the identity identification ID; or the matched vehicle-mounted end control system is judged through the change of the signal strength of the vehicle-mounted end 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 end control system within the communication range received by the charging end system gradually becomes larger and belongs to the vehicle-mounted end control system with the largest signal strength, which is the matched vehicle-mounted end control system.

5. The control method of an electric vehicle charging cover according to claim 1 or 2, characterized in that: The vehicle-mounted end system detects the insertion state of the charging gun after controlling the charging cover to open, and if the charging gun is not inserted within a set time threshold, the charging cover is controlled to return to the closed state.

6. A control system for an electric vehicle charging cover, characterized by: The control system is used to run the control method as claimed in any one of claims 1-5, and the control system comprises a charging end system and a vehicle-mounted end control system; wherein the charging end system is arranged in the charging gun, and the vehicle-mounted end control system is arranged in the vehicle. During the movement of the charging gun from the charging box to the vehicle or the movement of the charging gun to the charging box after the charging is completed, the charging end system and the vehicle-mounted end control system interactively control to control the opening and closing of the charging cover.

7. A control system for an electric vehicle charging flap as claimed in claim 6, characterised in that: The charging end system collects the plug-in state of the charging gun through a charging gun state 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.

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