Control method of small charging door and small charging door

Abstract

The invention discloses a charging small door control method and a charging small door, and relates to the field of vehicle automatic control. The charging small door control method comprises the steps that whether a small door body needs to be heated currently or not is judged; if necessary, the heating coil is controlled to heat to heat the small door main body; detecting the capacitance value of the ground capacitance of the heating coil; when the small door body is in the open state, the small door body is controlled to be closed; and when the small door main body is in the closed state, the small door main body is controlled to be opened. The heating coil of the small door body can melt accumulated snow attached to the small charging door of the automobile during heating, and the situation that the small charging door cannot be opened is avoided. Meanwhile, the capacitance value of the ground capacitance of the heating coil is changed according to the distance between the user and the small door body, if the capacitance value of the ground capacitance is larger than the preset value, it is proved that the user needs to open the charging small door or close the charging small door at present, corresponding operation is executed according to the current state of the charging small door, the user does not need to really press a button, and the user experience is improved. The small charging door can be controlled to be opened and closed more conveniently.

Description

Technical Field

[0001] The present invention relates to the field of vehicle automatic control, and in particular to a control method for a charging door and the charging door. Background Art

[0002] With the popularity of vehicles, whether it is a fuel vehicle or a new energy vehicle, the refueling door or the charging door are places with high frequency of use. At present, electric vehicles are mainly equipped with a charging port at the rear of the vehicle for charging electric energy. The existing charging doors are mostly integrated, and the charging door is opened or closed by folding or moving the charging door as a whole, or by folding the two parts separately to open the charging port. However, whether the charging door is opened or closed by folding or moving, it needs to be manually unlocked to open or close the charging door, which is not intelligent enough and the user experience is not high. At the same time, the outer surface of the charging door is often attached with dust or dirt, and it is not convenient for users to press the button on the charging door to open or close the charging door. In addition, in snowy weather in winter, snow accumulates on the charging door of the car, which can easily freeze the charging door and make it impossible to open the charging door. Summary of the invention

[0003] The purpose of the present invention is to provide a control method and a charging door, which avoids the situation where the charging door cannot be opened. It is more convenient to control the opening and closing of the charging door without the user actually pressing a button.

[0004] In order to solve the above technical problems, the present invention provides a control method for a small charging door, wherein the small charging door comprises a small door body provided with a heating coil;

[0005] The control method of the charging door includes:

[0006] Determining whether the small door body needs to be heated at present;

[0007] If necessary, controlling the heating coil to generate heat to heat the small door body;

[0008] Detecting the capacitance of the heating coil to the ground, wherein the capacitance of the capacitance to the ground is positively correlated with the distance between the user and the small door body;

[0009] When the capacitance of the ground capacitor is greater than a preset value, determining the current opening and closing state of the small door body;

[0010] When the opening and closing state of the small door main body is an open state, controlling the small door main body to close;

[0011] When the opening and closing state of the small door main body is a closed state, the small door main body is controlled to open.

[0012] On the other hand, the charging door further includes a driving motor and a rotating shaft, wherein the door body is connected to the rotating shaft, and the rotating shaft is connected to the driving motor;

[0013] Also includes:

[0014] Presetting the motor action instructions corresponding to the opening signal for controlling the opening of the small door body and the closing signal for controlling the closing of the small door body, the action instructions include the rotation direction, number of rotations and speed of the driving motor;

[0015] Determine the current opening and closing status of the small door body, including:

[0016] determining an angular position of the drive motor;

[0017] The opening and closing state of the small door body is determined according to the angular position.

[0018] On the other hand, controlling the small door body to close includes:

[0019] Sending a motor action instruction corresponding to the closing signal to the driving motor so that the driving motor rotates to drive the small door body to close;

[0020] Controlling the small door body to open includes:

[0021] A motor action instruction corresponding to the opening signal is sent to the driving motor so that the driving motor rotates to drive the small door body to open.

[0022] On the other hand, the charging door further includes a first controllable switch and a second controllable switch, the first end of the first controllable switch is connected to the power supply end inside the vehicle, the second end of the first controllable switch is connected to the first end of the heating coil, the second end of the heating coil is connected to the first end of the second controllable switch, the second end of the second controllable switch is grounded, and the control end of the first controllable switch and the control end of the second controllable switch are both connected to the processor;

[0023] Controlling the heating coil to generate heat to heat the small door body includes:

[0024] The first controllable switch and the second controllable switch are both controlled to be turned on, and the heating coil is energized to generate heat to heat the small door body.

[0025] On the other hand, the processor is connected to the first end of the heating coil;

[0026] Detecting the capacitance of the heating coil to ground includes:

[0027] sending an excitation signal to the first end of the heating coil;

[0028] determining an induced current of a port sending the excitation signal;

[0029] The capacitance of the heating coil to ground is determined according to the amplitude and phase of the induced current.

[0030] On the other hand, the processor is also connected to the first end of the first controllable switch and the second end of the second controllable switch;

[0031] Before sending the excitation signal to the first end of the heating coil, the method further includes:

[0032] A shielding signal opposite to the excitation signal is sent to the first end of the first controllable switch and the second end of the second controllable switch, so as to shield the charging and discharging of the junction capacitance inside the first controllable switch and the second controllable switch.

[0033] In order to solve the above technical problems, the present invention also provides a charging door, comprising:

[0034] A processor, configured to implement the steps of the above-mentioned method for controlling the charging door when executing the computer program;

[0035] A small door body is provided with a heating coil and is connected to the processor.

[0036] On the other hand, the charging door also includes a driving motor and a rotating shaft;

[0037] The small door body is connected to the rotating shaft, and the rotating shaft is connected to the driving motor. The rotating shaft is used to rotate based on the driving of the driving motor and drive the small door body to rotate and open.

[0038] On the other hand, the small door body includes a panel, an inner plate, a shell, a first connecting plate and a second connecting plate, the shell is arranged on the first connecting plate on the inner surface of the inner plate, the panel is arranged on the second connecting plate on the outer surface of the inner plate, and the heating coil is arranged on the second connecting plate.

[0039] On the other hand, the charging door further includes a first controllable switch and a second controllable switch, the first end of the first controllable switch is connected to the power supply end inside the vehicle, the second end of the first controllable switch is connected to the first end of the heating coil, the second end of the heating coil is connected to the first end of the second controllable switch, the second end of the second controllable switch is grounded, the control end of the first controllable switch and the control end of the second controllable switch are both connected to the processor, and the processor is also connected to the first end of the first controllable switch and the second end of the second controllable switch;

[0040] The first controllable switch and the second controllable switch are used to be turned on based on the control of the processor to supply power to the heating coil, and enter a cut-off state when a shielding signal is received.

[0041] The present application provides a control method for a charging door and a charging door, which relates to the field of vehicle automatic control, including: judging whether it is currently necessary to heat the door body; if necessary, controlling the heating coil to heat up and heat the door body; detecting the capacitance of the heating coil to the ground; when the door body is in an open state, controlling the door body to close; when the door body is in a closed state, controlling the door body to open. The heating coil of the door body can melt the snow attached to the charging door of the car when it is heated, avoiding the situation where the charging door cannot be opened. At the same time, the capacitance of the heating coil to the ground changes according to the distance between the user and the door body. If the capacitance of the ground capacitance is greater than the preset value, it proves that the user currently needs to open or close the charging door. The corresponding operation can be performed according to the current state of the charging door, without the user actually pressing the button, and it is more convenient to control the opening and closing of the charging door. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the prior art and the drawings required for use in the embodiments are briefly introduced below. 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 these drawings without creative work.

[0043] Figure 1 A flow chart of a method for controlling a charging door provided by the present invention;

[0044] Figure 2 A schematic diagram of the structure of a charging door provided by the present invention;

[0045] Figure 3 A schematic diagram of the structure of another charging door provided by the present invention;

[0046] Figure 4 A schematic diagram of the structure of another charging door provided by the present invention;

[0047] Figure 5 A schematic structural diagram of another charging door provided by the present invention. DETAILED DESCRIPTION

[0048] The core of the present invention is to provide a control method and a charging door, which avoids the situation that the charging door cannot be opened. It is more convenient to control the opening and closing of the charging door without the user actually pressing a button.

[0049] 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.

[0050] Figure 1 A flow chart of a method for controlling a charging door provided by the present invention. Figure 2 A schematic diagram of the structure of a charging door provided by the present invention. Figure 3 A schematic diagram of the structure of another charging door provided by the present invention; the charging door comprises a door body provided with a heating coil;

[0051] The control method of the charging door includes:

[0052] S11: Determine whether the small door body needs to be heated at present; if so, proceed to step S12;

[0053] S12: Control the heating coil to heat up the small door body;

[0054] In winter, when it snows, the snow accumulates on the charging door of the car, which can easily freeze the charging door and make it impossible to open it. Therefore, the temperature of the door body needs to be increased to melt the snow before the charging door can be opened.

[0055] Specifically, there are many scenarios for heating the small door body, which can be done from two perspectives: automatic heating and manual heating. For example, if it was snowing the day before and the temperature was lower than the preset temperature, there must be a high possibility that the charging door was frozen. At this time, the heating coil can be automatically controlled to heat up when the user has a charging demand. In addition, the user may find that the door is frozen and send a heating demand to the vehicle controller, which then controls the heating coil to heat up. Scenarios with heating needs include but are not limited to the above scenarios, and this application does not make too many restrictions here.

[0056] S13: Detecting the capacitance of the heating coil to the ground, where the capacitance of the capacitance to the ground is positively correlated with the distance between the user and the main body of the small door;

[0057] S14: when the capacitance of the ground capacitor is greater than a preset value, determining the current opening and closing state of the small door body;

[0058] S15: When the opening and closing state of the small door body is the open state, controlling the small door body to close;

[0059] S16: When the opening and closing state of the small door body is the closed state, control the small door body to open.

[0060] The outer surface of the charging door is often covered with dust or dirt, and it is not convenient for users to press the button on the charging door to open or close it. Therefore, this application adopts the method of sensing the user through the air, that is, the user does not need to actually touch the charging door to identify the user's need to open or close the door. When the user approaches the heating coil, the capacitance of the heating coil to the ground will change. The closer the user is to the door body, the greater the capacitance of the ground capacitor. Therefore, by reasonably setting the preset value of the capacitor, the distance at which the user triggers the door to open or close can be adjusted.

[0061] Furthermore, when determining whether the user has a need to open or close the door, it is necessary to first determine the current opening and closing state of the small door body, because the user's command cannot distinguish whether it is a need to open or close the door, and can only determine whether the user has a need to open or close the door. Therefore, if the current small door body is open, then the small door body is controlled to be closed, and if the small door body is closed, then the small door body is controlled to be opened.

[0062] The entire opening and closing control process of the charging door does not require contact operation, which makes it convenient for users to perform contactless operations when they have items in their hands and have no free time. This greatly facilitates the use of the charging door by users and improves the convenience of using the charging door. At the same time, it can also enhance the interaction between the charging door and the user, and improve the intelligence level of the charging door and user experience.

[0063] It should also be noted that the method provided in the present application is applied to a controller, which can reuse the vehicle's entire vehicle controller.

[0064] The present application provides a control method for a charging door, which relates to the field of vehicle automatic control, including: judging whether it is currently necessary to heat the door body; if necessary, controlling the heating coil to heat up and heat the door body; detecting the capacitance of the heating coil to the ground; when the door body is in an open state, controlling the door body to close; when the door body is in a closed state, controlling the door body to open. The heating coil of the door body can melt the snow attached to the charging door of the car when it is heated, avoiding the situation where the charging door cannot be opened. At the same time, the capacitance of the heating coil to the ground changes according to the distance between the user and the door body. If the capacitance of the ground capacitance is greater than the preset value, it proves that the user currently needs to open or close the charging door. The corresponding operation can be performed according to the current state of the charging door, without the user actually pressing the button, and it is more convenient to control the opening and closing of the charging door.

[0065] Based on the above embodiments:

[0066] In some embodiments, the charging door further includes a driving motor and a rotating shaft, the door body is connected to the rotating shaft, and the rotating shaft is connected to the driving motor;

[0067] Also includes:

[0068] Pre-setting the motor action instructions corresponding to the opening signal for controlling the opening of the small door body and the closing signal for controlling the closing of the small door body, the action instructions include the rotation direction, number of rotations and speed of the driving motor;

[0069] Determine the current opening and closing status of the small door body, including:

[0070] determining the angular position of the drive motor;

[0071] The opening and closing state of the small door body is determined according to the angular position.

[0072] The small door body is rotatably connected to the charging port of the car through the connection of the small door connection mechanism; the heating coil is arranged on the small door body, and is used to identify gestures or heat the small door panel; the driving motor is connected to the rotating shaft, and is used to drive the small door body to rotate through the small door connection mechanism based on the gestures recognized by the heating coil to open or close the charging port of the car. The small door connection mechanism includes a rotating shaft and a bracket fixedly connected to the inner panel of the small door, the rotating shaft is provided with an axis hole, and the rotating shaft is fixedly connected to the bracket fixedly connected to the inner panel of the small door; one end of the rotating shaft extends out of the rotating shaft hole and is connected to the main shaft of the driving motor, so that the rotating shaft drives the small door body to rotate under the drive of the driving motor.

[0073] The integrated wiring harness interface is arranged on the housing of the small door and communicates with the vehicle controller of the car. When the user walks to the charging small door of the car and performs a gesture, the heating coil recognizes the signal that the gesture causes the capacitance to change accordingly, and transmits the corresponding changed signal to the vehicle controller through the first wiring harness interface. The vehicle controller then analyzes the received corresponding changed signal, obtains the corresponding motor action instruction of the drive motor, and transmits it to the drive motor through the second wiring harness interface. The motor action instruction indicates the rotation direction, number of rotations, speed and other parameters of the drive motor, wherein the mapping relationship between the predefined corresponding changed signal and the motor action instruction can be pre-stored in the vehicle controller. After receiving the motor action instruction, the drive motor starts to drive, and drives the small door inner plate to perform the corresponding opening / closing action through the rotating shaft and the bracket fixedly connected to the small door inner plate, thereby realizing the switch control of the charging small door.

[0074] In some embodiments, controlling the small door body to close includes:

[0075] Sending a motor action command corresponding to the closing signal to the driving motor so as to drive the motor to rotate and drive the small door body to close;

[0076] Control the opening of the small door, including:

[0077] A motor action command corresponding to the opening signal is sent to the driving motor so as to drive the motor to rotate and drive the small door body to open.

[0078] The gesture-sensing charging door also includes an integrated wiring harness interface, which includes a first wiring harness interface connected to the heating coil and a second wiring harness interface connected to the drive motor; wherein, the heating coil converts the corresponding change in capacitance caused by the gesture action into a Hand on signal or a Hand off signal through the first wiring harness interface, and transmits the Hand on or Hand off signal to the vehicle controller of the car; the drive motor is driven in response to the electrical action command obtained by the vehicle controller based on the identification of the Hand on or Hand off signal, and drives the door body to rotate through the rotating shaft to open or close the charging port of the car.

[0079] Figure 4 A schematic diagram of the structure of another charging door provided by the present invention;

[0080] In some embodiments, the charging door further includes a first controllable switch and a second controllable switch, the first end of the first controllable switch is connected to the power supply end inside the vehicle, the second end of the first controllable switch is connected to the first end of the heating coil, the second end of the heating coil is connected to the first end of the second controllable switch, the second end of the second controllable switch is grounded, and the control end of the first controllable switch and the control end of the second controllable switch are both connected to the processor;

[0081] Control the heating coil to heat the small door body, including:

[0082] The first controllable switch and the second controllable switch are both controlled to be turned on, and the heating coil is energized to generate heat, thereby heating the small door body.

[0083] The purpose of providing two controllable switches, namely the first controllable switch and the second controllable switch, is to improve the stability of heating. Only when the first controllable switch and the second controllable switch are both turned on, the heating coil will form a complete heating circuit with the power supply and the heating coil will generate heat. It should be noted that the heating coil is a capacitive coil.

[0084] In some embodiments, the processor is connected to the first end of the heating coil;

[0085] Detect the capacitance of the heating coil to ground, including:

[0086] sending an excitation signal to the first end of the heating coil;

[0087] Determine the induced current of the port sending the excitation signal;

[0088] The capacitance of the heating coil to ground is determined according to the amplitude and phase of the induced current.

[0089] When detecting the capacitance of the heating coil to the ground, a high-frequency sinusoidal excitation signal is sent to the heating coil. It should be noted that the sinusoidal wave can be sent to the first end or the second end of the heating coil. When sending the high-frequency sinusoidal excitation signal to the heating coil, since the heating coil has the capacitance of the capacitance to the ground, the induced current corresponding to the high-frequency sinusoidal wave will decrease due to the capacitance of the capacitance to the ground. Based on the amplitude and phase of the induced current, the capacitance of the heating coil to the ground can be obtained.

[0090] In some embodiments, the processor is further connected to a first end of the first controllable switch and a second end of the second controllable switch;

[0091] Before sending the excitation signal to the first end of the heating coil, the method further includes:

[0092] A shielding signal opposite to the excitation signal is sent to the first end of the first controllable switch and the second end of the second controllable switch, so as to shield the charging and discharging of the junction capacitance inside the first controllable switch and the second controllable switch.

[0093] Considering that the first controllable switch and the second controllable switch may be MOS tubes, the junction capacitance inside the MOS tubes will affect the capacitance of the heating coil to ground. Therefore, the controller generates a shielding signal that is completely identical to the excitation signal as the detection signal. At this time, the first end of the first controllable switch receives the shielding signal, and the second end receives the excitation signal through the heating coil. The first end of the second controllable switch receives the shielding signal, and the second end receives the excitation signal through the heating coil. Therefore, the first controllable switch and the second controllable switch can receive two completely identical signals at both ends, avoiding the charging and discharging of the junction capacitance of the MOS tubes in the two controllable switches, thereby eliminating the influence of the junction capacitance of the MOS tubes used by the two controllable switches on the detection signal.

[0094] Figure 5 A schematic diagram of another charging door provided by the present invention, the charging door comprising:

[0095] The processor 51 is used to implement the steps of the above-mentioned charging door control method when executing the computer program;

[0096] The small door body 1 is provided with a heating coil 2 and is connected with a processor.

[0097] In some embodiments, the charging door further includes a driving motor 3 and a rotating shaft 41;

[0098] The small door body 1 is connected to the rotating shaft 41, and the rotating shaft 41 is connected to the driving motor 3. The rotating shaft 41 is used to rotate based on the driving of the driving motor 3 and drive the small door body 1 to rotate and open.

[0099] The small door connection mechanism 4 includes a shaft 41, an integrated wiring harness interface 5 connected to a processor 52.

[0100] In some embodiments, the small door body 1 includes a panel 11, an inner panel 12, a shell 13, a first connecting plate and a second connecting plate, the shell 13 is arranged on the first connecting plate on the inner surface of the inner panel 12, the panel 11 is arranged on the second connecting plate on the outer surface of the inner panel 12, and the heating coil 2 is arranged on the second connecting plate.

[0101] In some embodiments, the charging door further includes a first controllable switch and a second controllable switch, the first end of the first controllable switch is connected to the power supply end inside the vehicle, the second end of the first controllable switch is connected to the first end of the heating coil 2, the second end of the heating coil 2 is connected to the first end of the second controllable switch, the second end of the second controllable switch is grounded, the control end of the first controllable switch and the control end of the second controllable switch are both connected to the processor, and the processor is also connected to the first end of the first controllable switch and the second end of the second controllable switch;

[0102] The first controllable switch and the second controllable switch are used to be turned on based on the control of the processor to supply power to the heating coil 2, and enter a cut-off state when a shielding signal is received.

[0103] For the introduction of the charging door provided in this application, please refer to the above embodiment and will not be repeated here.

[0104] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0105] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0106] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for controlling a charging door, characterized in that: The charging door comprises a door body provided with a heating coil; The control method of the charging door includes: Determining whether the small door body needs to be heated at present; If necessary, controlling the heating coil to generate heat to heat the small door body; Detecting the capacitance of the heating coil to the ground, wherein the capacitance of the capacitance to the ground is positively correlated with the distance between the user and the small door body; When the capacitance of the ground capacitor is greater than a preset value, determining the current opening and closing state of the small door body; When the opening and closing state of the small door main body is an open state, controlling the small door main body to close; When the opening and closing state of the small door main body is a closed state, the small door main body is controlled to open.

2. The control method of the charging door according to claim 1, characterized in that: The charging door also includes a driving motor and a rotating shaft, the door body is connected to the rotating shaft, and the rotating shaft is connected to the driving motor; Also includes: Presetting the motor action instructions corresponding to the opening signal for controlling the opening of the small door body and the closing signal for controlling the closing of the small door body, the action instructions include the rotation direction, number of rotations and speed of the driving motor; Determine the current opening and closing status of the small door body, including: determining an angular position of the drive motor; The opening and closing state of the small door body is determined according to the angular position.

3. The control method of the charging door according to claim 2, characterized in that: Controlling the small door body to close includes: Sending a motor action instruction corresponding to the closing signal to the driving motor so that the driving motor rotates to drive the small door body to close; Controlling the small door body to open includes: A motor action instruction corresponding to the opening signal is sent to the driving motor so that the driving motor rotates to drive the small door body to open.

4. The method for controlling a charging door according to any one of claims 1 to 3, characterized in that: The charging door further includes a first controllable switch and a second controllable switch, wherein a first end of the first controllable switch is connected to a power supply end inside the vehicle, a second end of the first controllable switch is connected to a first end of the heating coil, a second end of the heating coil is connected to a first end of the second controllable switch, a second end of the second controllable switch is grounded, and a control end of the first controllable switch and a control end of the second controllable switch are both connected to a processor; Controlling the heating coil to generate heat to heat the small door body includes: The first controllable switch and the second controllable switch are both controlled to be turned on, and the heating coil is energized to generate heat to heat the small door body.

5. The control method of the charging door according to claim 4, characterized in that: The processor is connected to the first end of the heating coil; Detecting the capacitance of the heating coil to ground includes: sending an excitation signal to the first end of the heating coil; determining an induced current of a port sending the excitation signal; The capacitance of the heating coil to ground is determined according to the amplitude and phase of the induced current.

6. The control method of the charging door according to claim 5, characterized in that: The processor is also connected to a first end of the first controllable switch and a second end of the second controllable switch; Before sending the excitation signal to the first end of the heating coil, the method further includes: A shielding signal opposite to the excitation signal is sent to the first end of the first controllable switch and the second end of the second controllable switch, so as to shield the charging and discharging of the junction capacitance inside the first controllable switch and the second controllable switch.

7. A charging door, characterized in that: include: A processor, configured to implement the steps of the method for controlling a charging door according to any one of claims 1 to 6 when executing a computer program; A small door body is provided with a heating coil and is connected to the processor.

8. The charging door as claimed in claim 7, characterized in that: The charging door also includes a driving motor and a rotating shaft; The small door body is connected to the rotating shaft, and the rotating shaft is connected to the driving motor. The rotating shaft is used to rotate based on the driving of the driving motor and drive the small door body to rotate and open.

9. The charging door as claimed in claim 7, characterized in that: The small door body includes a panel, an inner plate, a shell, a first connecting plate and a second connecting plate. The shell is arranged on the first connecting plate on the inner surface of the inner plate, the panel is arranged on the second connecting plate on the outer surface of the inner plate, and the heating coil is arranged on the second connecting plate.

10. The charging door according to any one of claims 7 to 9, characterized in that: The charging door further includes a first controllable switch and a second controllable switch, wherein a first end of the first controllable switch is connected to a power supply end inside the vehicle, a second end of the first controllable switch is connected to a first end of the heating coil, a second end of the heating coil is connected to a first end of the second controllable switch, a second end of the second controllable switch is grounded, a control end of the first controllable switch and a control end of the second controllable switch are both connected to a processor, and the processor is also connected to a first end of the first controllable switch and a second end of the second controllable switch; The first controllable switch and the second controllable switch are used to be turned on based on the control of the processor to supply power to the heating coil, and enter a cut-off state when a shielding signal is received.

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