Home charging pile with one-button opening and visual charging and circuit control method thereof

Abstract

The present invention proposes a household charging pile with one-button cover opening and visualized charging and a circuit control method thereof, which relates to the technical field of charging pile circuit control, including a household AC charging pile, a charging gun, a wire and an electric car; the household AC charging pile and the electric car are connected for two-way communication; the charging gun is respectively connected to the household AC charging pile and the electric car through a wire. The present invention can realize one-button cover opening and charging of the household AC charging pile, and can obtain key data such as charge information, charging progress, battery temperature, battery insulation, etc. of the vehicle battery based on Bluetooth and 4G communications, thereby realizing transparent, digital and visualized charging, and significantly improving the user's charging experience.

Description

Technical Field

[0001] The present invention provides a household charging pile with one-button cover opening and visualized charging and a circuit control method thereof, and relates to the technical field of charging pile circuit control, and specifically to the technical field of household charging piles with one-button cover opening and visualized charging. Background Art

[0002] As new energy electric vehicles become more and more intelligent, Bluetooth and 4G are becoming more and more standard features of electric vehicles. On the other hand, as more and more people use home AC charging piles, they find that although the home AC charging piles on the market also have Bluetooth and 4G functions, the charging method is still primitive, that is, you need to manually open the charging cover of the electric vehicle, then plug in the gun to charge, and you cannot see the charging status of the vehicle battery through the charging APP. Charging is not transparent and there is no sense of security. The fundamental reason is that although the charging piles and electric vehicles are equipped with stepless communication systems such as Bluetooth and 4G, the two are not connected, resulting in the charging piles and electric vehicles not realizing digital and visual charging interaction and safety detection functions, which brings anxiety and inconvenience to users. Summary of the invention

[0003] The present invention provides a household charging pile with one-button cover opening and visual charging and a circuit control method thereof to solve the above problems:

[0004] The present invention provides a household charging pile with one-button cover opening and visual charging and a circuit control method thereof, wherein the household charging pile includes a pile end and a vehicle end;

[0005] The pile end includes a household AC charging pile, a charging gun and a wire;

[0006] The vehicle end includes an electric vehicle;

[0007] The household AC charging pile and the electric vehicle are connected in bidirectional communication;

[0008] The charging gun is connected to the household AC charging pile and the electric vehicle respectively through wires.

[0009] Furthermore, the household AC charging pile includes a main control (MCU), a first Bluetooth module (BT1), a first 4G module (4G1), a CC detection unit (CC), a CP control guidance unit (CP), a relay unit (J1) and a wire;

[0010] The main control (MCU) is connected to the first Bluetooth module (BT1) and the first 4G module (4G1) respectively through the serial port;

[0011] The main control unit (MCU) is connected to the CC detection unit (CC), the CP control guidance unit (CP) and the relay unit (J1) through wires respectively;

[0012] The detection signal and control signal output ends of the main control (MCU) are respectively connected to the detection signal and control signal input ends of the CC detection unit (CC), the CP control guidance unit (CP) and the relay unit (J1).

[0013] Further, the CC detection unit (CC) includes a 3.3V positive terminal of the main control (MCU), a CC detection resistor (Rcc), a pile end CC signal detection point (CC1), a vehicle signal anti-backflow diode (D2) and a wire;

[0014] One end of the CC detection resistor (Rcc) is connected to the 3.3V positive terminal of the main control (MCU) power supply through a wire, and the other end is connected in series with the vehicle signal anti-backflow diode (D2);

[0015] The pile end CC signal detection point (CC1) is a common point of the series connection and is connected to a detection circuit inside the main control (MCU) through a wire.

[0016] Further, the CP control guidance unit (CP) includes a 12V positive terminal of the main control (MCU), a maximum charging capability signal (PWM) of the main control (MCU), a CP detection resistor (R1), a charging connection confirmation signal detection point (CP) and a wire;

[0017] The 12V positive terminal and the maximum charging capability signal (PWM) of the main control (MCU) are switched and connected with the CP detection resistor (R1) in a preset charging connection state according to a preset program strategy by the main control (MCU);

[0018] The charging connection confirmation signal detection point (CP) is taken from the middle point where the CP detection resistor (R1) is connected to the electric vehicle through the charging gun.

[0019] Furthermore, the relay unit (J1) includes a grid input (single-phase N, L1 or three-phase L1-L3), a relay and an output wire.

[0020] Further, the charging gun includes a CC resistor network, a normally closed micro switch (S3) and a wire;

[0021] The CC resistor network includes a series connection structure of resistors R4 and RC, one end of the CC resistor network is connected to the wire PE, and the other end after the series connection is respectively connected to the cathode of the vehicle signal anti-backflow diode (D2) of the CC detection unit of the household AC charging pile and the vehicle end;

[0022] The normally closed micro switch (S3) is connected in parallel with the resistor R4.

[0023] Furthermore, the electric vehicle includes a second Bluetooth module (BT2), a second 4G module (4G2), a charging cover (CG), a vehicle control unit (VCU), a BCC, R2, R3, S2, D1, an on-board charger (OBC) and on-board battery packs (BATs).

[0024] Furthermore, the first Bluetooth module (BT1) and the first 4G module (4G1) of the household AC charging pile are wirelessly connected with the second Bluetooth module (BT2) and the second 4G module (4G2) of the electric vehicle respectively.

[0025] Furthermore, the circuit control method comprises:

[0026] Power on the main control unit (MCU) of the home AC charging pile to obtain the preset program strategy;

[0027] Scanning and searching for vehicles according to a preset period by using a first Bluetooth module and a first 4G module of a household AC charging pile, and obtaining an electric vehicle that has entered a parking space, wherein the household charging pile is in a dual-channel communication standby mode;

[0028] The main control unit (MCU) of the home AC charging pile automatically connects and authenticates the electric vehicle via Bluetooth or 4G according to the program strategy;

[0029] After authentication, the battery charge information of the electric vehicle is obtained through the home AC charging pile, and charging suggestion information is sent to the electric vehicle according to the battery charge information to obtain user selection information;

[0030] Controlling the opening of the charging cover of the electric vehicle for charging according to the user selection information;

[0031] If the user selection information is not obtained within the preset time, the charging gun button signal is obtained through the CC detection unit (CC) of the home AC charging pile, and a request message is sent to the electric vehicle to request to open the charging cover for charging;

[0032] The home AC charging pile main control unit (MCU) obtains the status of the charging gun and its electrical connection information with the electric vehicle through the CC detection unit (CC) and the CP control guidance unit (CP), and then detects whether the electric vehicle is allowed to charge;

[0033] If the electric vehicle is allowed to charge, the household AC charging pile will actively close the relay unit (J1) according to the strategy program, and the AC power (single-phase or three-phase) of the power grid will be transmitted to the electric vehicle for one-touch charging.

[0034] Furthermore, the home AC charging pile main control unit (MCU) obtains the status of the charging gun and its electrical connection information with the electric vehicle through the CC detection unit (CC) and the CP control guidance unit (CP), and then detects whether the electric vehicle is allowed to charge, including:

[0035] When S3 is pressed, the switch state changes from on to off, resistor R4 is effective, and the total resistance in the CC resistor network = R4 + RC;

[0036] When S3 is not pressed, the switch remains in the on state, the state of resistor R4 is the same as the state of the wire, resistor R4 is invalid, and the total resistance in the CC resistor network = resistor RC;

[0037] The different resistance values ​​generated by the CC resistance network in the charging gun are obtained through the pressed or not pressed state information of the normally closed micro switch (S3), and the main control (MCU) obtains the resistance value change data.

[0038] The beneficial effects of the present invention are as follows: it can realize one-key opening and charging of a household AC charging pile, and can obtain key data such as the charge information, charging progress, battery temperature, and battery insulation of the vehicle battery based on Bluetooth and 4G communication, so as to realize transparent, digital and visual charging, and significantly improve the charging experience of the user. In order to solve the common problems in the prior art, the present invention proposes a solution to open the wireless communication systems such as Bluetooth and 4G between the charging pile and the electric vehicle, so that the charging pile and the electric vehicle can realize digital communication and intelligent interaction. When the electric vehicle enters the parking space, the charging pile automatically links the electric vehicle through Bluetooth or 4G. After authentication, the charging pile actively queries the battery charge information of the electric vehicle. When the charge is lower than a certain amount, the charging pile actively sends a charging suggestion to the electric vehicle through Bluetooth or 4G, and displays it on the on-board computer of the electric vehicle. If the user chooses to agree to charge, the electric vehicle actively opens the charging cover and prompts the user to plug in the charging gun, thereby eliminating the trouble of the user getting off the car to open the charging cover, providing the user with great convenience and a good butler-style charging experience. If the authentication between the charging pile and the electric vehicle fails for some reason, the user can lightly press the button switch on the charging gun head before plugging in the charging gun. At this time, after the charging pile detects the button signal, it will actively request the electric vehicle to open the charging cover, and the electric vehicle will actively open the charging cover, thereby realizing one-click opening of the cover, and based on the wireless communication between the vehicle and the pile, further realizing a visual charging experience. The user can observe the key data such as the charge information, charging progress, battery temperature, and battery insulation of the vehicle battery on the charging APP, realizing transparent, digital and visual charging, so that the user can charge quickly without opening the charging cover or with one-click opening, significantly improving the charging experience. Therefore, the proposal and design of this solution effectively solves the problem that the household AC charging pile cannot automatically control the charging cover of the electric vehicle, and solves the problem of digital communication and intelligent interaction between the household AC charging pile and the electric vehicle, realizing transparent, digital and safe charging, with low cost, high technical and economic efficiency, and can be promoted and used on a large scale. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic diagram of a circuit control method for a household charging pile with one-touch cover opening and visual charging;

[0040] Figure 2 Schematic diagram of the control circuit of a household charging pile with one-touch opening and visual charging. DETAILED DESCRIPTION

[0041] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0042] In one embodiment of the present invention, a household charging pile with one-touch cover opening and visual charging and a circuit control method thereof are provided, wherein the household charging pile includes a pile end and a vehicle end;

[0043] The pile end includes a household AC charging pile, a charging gun and a wire;

[0044] The vehicle end includes an electric vehicle;

[0045] The household AC charging pile and the electric vehicle are connected in bidirectional communication;

[0046] The charging gun is connected to the household AC charging pile and the electric vehicle respectively through wires.

[0047] The working principle of the above technical solution is as follows: the present invention is composed of a household AC charging pile, a charging gun, a wire and an electric vehicle, wherein the household AC charging pile is composed of a main control (MCU), a Bluetooth module (BT1), a 4G module (4G1), a CC detection unit (CC), a CP control guidance unit (CP), a relay unit (J1) and a wire. When the main control (MCU) is powered on, according to the program strategy, the Bluetooth module (BT1) and the 4G module (4G1) in the household AC charging pile periodically scan for the vehicle and are in a dual-channel communication standby mode. When the electric vehicle enters the parking space, the household AC charging pile main control (MCU) automatically connects the electric vehicle through Bluetooth or 4G according to the program strategy. After authentication, the household AC charging pile actively queries the battery charge information of the electric vehicle. When the charge is lower than a certain amount, the household AC charging pile actively sends a charging suggestion to the electric vehicle through Bluetooth or 4G, and displays it on the on-board computer of the electric vehicle. If the user chooses to agree to charge, the electric vehicle actively opens the charging cover and prompts the user to plug in the charging gun, thereby eliminating the trouble of the user getting off the vehicle to open the charging cover, providing the user with great convenience and a good butler-style charging experience. If the authentication between the charging pile and the electric vehicle fails for some reason, the user can lightly press the button switch on the charging gun head before plugging in the charging gun. At this time, the CC detection unit (CC) of the home AC charging pile detects the button signal and actively requests the electric vehicle to open the charging cover through Bluetooth or 4G. The electric vehicle then actively opens the charging cover, thus achieving one-click opening. Afterwards, the user plugs in the charging gun, and the home AC charging pile main control (MCU) detects the status of the charging gun and its electrical connection with the electric vehicle through the CC detection unit (CC) and the CP control guidance unit (CP), and further detects whether the electric vehicle is allowed to charge (after its S2 switch is closed, the CP control guidance unit (CP) will detect a specific signal voltage). If the electric vehicle is allowed to charge, the home AC charging pile actively closes the relay unit (J1) according to the strategy program, such as Figure 2 shown.

[0048] The technical effect of the above technical solution is: through the above principle, the AC power of the power grid (single-phase or three-phase) is transmitted to the electric vehicle, thereby finally realizing one-key opening of the cover for convenient charging, or even button-free intelligent charging. Due to the wireless communication mechanism of the vehicle pile of the present invention, the household AC charging pile can further obtain the key data such as the charge information, charging progress, battery temperature, and battery insulation of the vehicle battery through the Bluetooth module (BT1) and the 4G module (4G1), so that the charging can be transparent, digitalized, and visualized, which significantly improves the user's charging experience. It can realize one-key opening of the cover for charging of the household AC charging pile, and can obtain the key data such as the charge information, charging progress, battery temperature, and battery insulation of the vehicle battery based on Bluetooth and 4G communications, so that the charging can be transparent, digitalized, and visualized, which significantly improves the user's charging experience. In order to solve the common problems in the prior art, the present invention proposes a solution to open the wireless communication systems such as Bluetooth and 4G between the charging pile and the electric vehicle, so that the charging pile and the electric vehicle can realize digital communication and intelligent interaction. When the electric car enters the parking space, the charging pile automatically connects to the electric car via Bluetooth or 4G. After authentication, the charging pile actively queries the battery charge information of the electric car. When the charge is lower than a certain level, the charging pile actively sends charging suggestions to the electric car via Bluetooth or 4G and displays them on the onboard computer of the electric car. If the user chooses to agree to charge, the electric car will actively open the charging cover and prompt the user to plug in the charging gun, thus eliminating the trouble of the user getting off the car to open the charging cover, providing users with great convenience and a good butler-style charging experience. If the authentication between the charging pile and the electric car fails for some reason, the user can lightly press the button switch on the charging gun head before plugging in the charging gun. At this time, after the charging pile detects the button signal, it will actively request the electric car to open the charging cover. The electric car will actively open the charging cover, thus realizing one-click opening of the cover. Based on the wireless communication between the car and the pile, a visual charging experience is further realized. The user can observe the key data such as the charge information, charging progress, battery temperature, and battery insulation of the vehicle battery on the charging APP, realizing transparent, digital and visual charging, so that the user can charge quickly without opening the charging cover or opening the cover with one click, significantly improving the charging experience. Therefore, the proposal and design of this solution effectively solves the problem that household AC charging piles cannot automatically control the charging cover of electric vehicles, and solves the problem of digital communication and intelligent interaction between household AC charging piles and electric vehicles, realizing transparent, digital and safe charging, with low cost, high technical and economic efficiency, and can be promoted and used on a large scale.

[0049] In one embodiment of the present invention, the household AC charging pile includes a main control (MCU), a first Bluetooth module (BT1), a first 4G module (4G1), a CC detection unit (CC), a CP control guidance unit (CP), a relay unit (J1) and a wire;

[0050] The main control (MCU) is connected to the first Bluetooth module (BT1) and the first 4G module (4G1) respectively through the serial port;

[0051] The main control unit (MCU) is connected to the CC detection unit (CC), the CP control guidance unit (CP) and the relay unit (J1) through wires respectively;

[0052] The detection signal and control signal output ends of the main control (MCU) are respectively connected to the detection signal and control signal input ends of the CC detection unit (CC), the CP control guidance unit (CP) and the relay unit (J1).

[0053] The working principle of the above technical solution is as follows: the household AC charging pile includes a main control (MCU), a Bluetooth module (BT1), a 4G module (4G1), a CC detection unit (CC), a CP control guidance unit (CP), a relay unit (J1) and a wire. The Bluetooth module (BT1) and the 4G module (4G1) are connected to the main control (MCU) through a serial port, and the CC detection unit, the CP control guidance unit and the relay unit (J1) are respectively connected to the main control (MCU) through wires and are detected and controlled by the main control (MCU).

[0054] The technical effect of the above technical solution is: with the main control (MCU) as the core, the centralized management and intelligent control of the entire charging pile system are realized. This design makes the charging pile have a high degree of integration, can execute various instructions efficiently and accurately, and improves the overall work efficiency and stability. The Bluetooth module (BT1) and the 4G module (4G1) are connected to the main control (MCU) through the serial port, providing a variety of communication means for the charging pile. The Bluetooth module can realize short-range wireless data transmission, which is convenient for pairing and interaction with mobile phones or other Bluetooth devices; while the 4G module supports remote communication, so that the charging pile can access the Internet, realize remote monitoring, data upload and remote fault diagnosis and other functions, greatly enhancing the flexibility and convenience of the charging pile. The CC detection unit and the CP control guidance unit are responsible for detecting the charging connection status and controlling the voltage, current and other parameters during the charging process. The two units are connected to the main control (MCU) through wires and are detected and controlled by the main control, ensuring the accuracy and safety of the charging process. By accurately controlling the charging current and voltage, safety hazards such as overcharging and over-discharging of the battery can be avoided, and the battery life can be extended. As an important executive component in the charging pile, the relay unit (J1) is responsible for controlling the on and off of the charging circuit. Through the precise control of the relay unit by the main control (MCU), the charging pile can respond quickly and work efficiently. At the same time, the stability and reliability of the relay unit also ensure the safety and stability of the charging pile during long-term operation. Since the various modules and units of the charging pile are connected to the main control (MCU) through wires and are detected and controlled by the main control, it is easy to realize real-time monitoring and remote management of various parameters of the charging pile. This greatly reduces the maintenance cost and management difficulty of the charging pile, and improves the overall service quality and user satisfaction.

[0055] In one embodiment of the present invention, the CC detection unit (CC) includes a 3.3V positive terminal of a main control (MCU), a CC detection resistor (Rcc), a pile end CC signal detection point (CC1), a vehicle signal anti-backflow diode (D2) and a wire;

[0056] One end of the CC detection resistor (Rcc) is connected to the 3.3V positive terminal of the main control (MCU) power supply through a wire, and the other end is connected in series with the vehicle signal anti-backflow diode (D2);

[0057] The pile end CC signal detection point (CC1) is a common point of the series connection and is connected to a detection circuit inside the main control (MCU) through a wire.

[0058] The CP control guidance unit (CP) includes a 12V positive terminal of the main control (MCU), a maximum charging capability signal (PWM) of the main control (MCU), a CP detection resistor (R1), a charging connection confirmation signal detection point (CP) and a wire;

[0059] The 12V positive terminal and the maximum charging capability signal (PWM) of the main control (MCU) are switched and connected with the CP detection resistor (R1) in a preset charging connection state according to a preset program strategy by the main control (MCU);

[0060] The charging connection confirmation signal detection point (CP) is taken from the middle point where the CP detection resistor (R1) is connected to the electric vehicle through the charging gun.

[0061] The relay unit (J1) comprises a power grid input (single-phase N, L1 or three-phase L1-L3), a relay and an output wire.

[0062] The working principle of the above technical solution is as follows: The working principle of the CC detection unit (CC) in the household AC charging pile is as follows: When the main control (MCU) is powered on, its detection power supply 3.3V+ is divided by the resistor Rcc and the CC resistor network of the charging gun. According to the electrical principle, its voltage division formula is (RC+R4) / (RC+R4+Rcc)*3.3. In the present invention, the CC detection resistor (Rcc) is designed to be 1kΩ. In the CC resistor network of the charging gun, the resistors R4 and RC are the values ​​specified in the national standard GB / T 18487.1-2023, which are 3.3kΩ and 220Ω (7kW, 21kW) or 2.7kΩ and 680Ω (3.5kW, 11kW), respectively. When the normally closed micro switch (S3) of the charging gun is pressed or not pressed, the main control (MCU) obtains different signal voltages through the CC signal detection point (CC1) at the pile end to diagnose whether the normally closed micro switch (S3) of the charging gun is pressed.

[0063] The working principle of the CP control guidance unit (CP) in the household AC charging pile is: when the main control (MCU) is powered on, its detection power supply 12V+ is divided by the CP detection resistor (R1) and the resistors R3 and R2 inside the electric vehicle. According to the electrical principle, the analysis formula is: R3*R2 / (R3+R2) / (R3*R2 / (R3+R2)+R1). Furthermore, according to the electrical principle diagram of the present invention, when the electric vehicle does not close its internal switch S2, the resistance R2 is 0. At the same time, the CP detection resistor (R1) in the CP control guidance unit in the household AC charging pile and the resistors R3 and R2 inside the electric vehicle are all the specified values ​​of the national standard GB / T 18487.1-2023, that is, 1kΩ, 2.74kΩ and 1.3kΩ respectively. Depending on whether the charging gun is connected to the electric vehicle and whether the electric vehicle closes its internal switch S2 indicating that charging is allowed, the main control (MCU) obtains different signal voltages through the charging connection confirmation signal detection point (CP) to identify whether the charging gun is reliably connected to the electric vehicle.

[0064] The CC detection unit includes a main control power supply 3.3V+, a CC detection resistor (Rcc), a pile end CC signal detection point (CC1), a vehicle signal anti-backflow diode (D2) and a wire. One end of the CC detection resistor (Rcc) is connected to the main control (MCU) power supply 3.3V+ through a wire, and the other end is connected in series with the vehicle signal anti-backflow diode (D2). The pile end CC signal detection point (CC1) takes the series common point and is connected to the detection circuit inside the main control (MCU) through a wire. The CP control guidance unit is composed of the main control (MCU) power supply 12V+, the main control (MCU) maximum charging capacity signal (PWM), the CP detection resistor (R1), the charging connection confirmation signal detection point (CP) and a wire. The main control (MCU) power supply 12V+ and its maximum charging capacity signal (PWM) are switched by the main control (MCU) according to the program strategy in different charging connection states to the CP detection resistor (R1). The charging connection confirmation signal detection point (CP) is taken from the resistor connected to the middle point of the electric vehicle through the charging gun. The relay unit (J1) consists of a grid input (single-phase N, L1 or three-phase L1~L3), a relay and an output wire.

[0065] The technical effect of the above technical solution is: the CC detection unit is powered by the main control power supply 3.3V+, and uses the series circuit of the CC detection resistor (Rcc) and the vehicle signal anti-backflow diode (D2) to accurately detect the connection status of the charging gun and the electric vehicle charging interface. When the charging gun is inserted into the electric vehicle charging interface, the CC signal is transmitted to the CC signal detection point (CC1) at the pile end through the resistor and the diode. The main control (MCU) can accurately determine whether the charging connection is established by detecting the voltage change at this point. The setting of the vehicle signal anti-backflow diode (D2) effectively prevents the electric vehicle end from backflowing the signal to the charging pile end, protecting the safety of the internal circuit of the charging pile. This avoids charging anomalies caused by signal interference or errors, and improves the stability and safety of the charging process. The CC detection unit adopts a simple series circuit structure and is connected to the detection circuit inside the main control (MCU) through a wire, which simplifies the circuit design, reduces the manufacturing cost, and improves the reliability and stability of the system. The CP control guidance unit is powered by the main control (MCU) power supply 12V+, and switches the main control (MCU) maximum charging capacity signal (PWM) connected to the CP detection resistor (R1) under different charging connection states according to the program strategy. In this way, the charging pile can intelligently adjust the charging parameters according to the request of the electric vehicle and its own maximum charging capacity to achieve precise control of the charging process. The setting of the charging connection confirmation signal detection point (CP) enables the charging pile to detect the physical connection status between the charging gun and the charging interface of the electric vehicle and confirm the establishment of the charging connection. This ensures the smooth progress of the charging process and avoids charging failure or safety problems caused by poor connection. The design of the CP control guidance unit enables the charging pile to be compatible with electric vehicles of different brands and models, improving the versatility and flexibility of charging facilities. The relay unit (J1) is connected to the power grid through the power grid input (single-phase N, L1 or three-phase L1~L3), and controls the on and off of the power grid input and the internal circuit of the charging pile through the relay. In this way, the charging pile can flexibly control the power grid input according to the charging demand under the premise of ensuring safety, avoiding charging safety problems caused by power grid failure or abnormality. The relay unit (J1) uses high-reliability relay elements to ensure the stability and reliability of the charging pile during long-term operation. At the same time, through the connection of the output wire, a reliable connection between the grid input and the internal circuit of the charging pile is achieved, improving the operating efficiency of the entire system. Through the design and technical means of the above units, functions such as accurate detection of charging connection status, intelligent control of charging process, provision of charging connection confirmation signal, and safe control of grid input are achieved.

[0066] In one embodiment of the present invention, the charging gun includes a CC resistor network, a normally closed micro switch (S3) and a wire;

[0067] The CC resistor network includes a series connection structure of resistors R4 and RC, one end of the CC resistor network is connected to the wire PE, and the other end after the series connection is respectively connected to the cathode of the vehicle signal anti-backflow diode (D2) of the CC detection unit of the household AC charging pile and the vehicle end;

[0068] The normally closed micro switch (S3) is connected in parallel with the resistor R4.

[0069] The working principle of the above technical solution is as follows: the charging gun includes a CC resistor network, a normally closed micro switch (S3) and a wire, wherein the CC resistor network includes resistors R4 and RC in series, one end of which is connected to the wire PE, and the other end of the series connection is connected to the cathode of the vehicle signal anti-backflow diode (D2) of the CC detection unit of the household AC charging pile and the vehicle end. The normally closed micro switch (S3) is connected in parallel to the resistor R4.

[0070] The technical effect of the above technical solution is as follows: the design of the CC resistor network (composed of resistors R4 and RC in series) enables a specific resistance value to be formed when the charging gun is inserted into the charging interface of the household AC charging pile, and this resistance value is connected to the CC detection unit of the charging pile through the wire PE. The CC detection unit of the charging pile can accurately identify whether the charging gun has been correctly inserted and the charging connection has been established by detecting the change of this resistance value. The setting of the vehicle signal anti-backflow diode (D2) is connected to the cathode of the CC resistor network, which effectively prevents the electric vehicle end from backflowing the signal to the charging pile end. This avoids charging anomalies caused by signal interference or errors, and improves the safety and stability of the charging process. The resistance value design of the CC resistor network complies with international or industry standards, so that the charging gun can be compatible with household AC charging piles of different brands and models, and improves the versatility and flexibility of charging facilities. The normally closed micro switch (S3) is connected in parallel to the resistor R4. When the charging gun is inserted into the charging pile, the micro switch is triggered and disconnected, which can be used as a signal for confirming the charging connection. Although in this design, the main role of the normally closed micro switch may not be directly used for charging connection confirmation (because this is usually achieved through the CP control guidance unit), it can be used as an additional safety mechanism or to detect the physical insertion status of the charging gun in specific cases. Through a simple resistor network and micro switch design, the charging gun can achieve charging connection detection and safety protection functions at a lower cost while maintaining the simplicity and reliability of the circuit design. Accurate charging connection identification and additional safety mechanisms, such as normally closed micro switches, can enhance user trust and satisfaction with the charging process and reduce charging failures or safety hazards caused by charging connection problems. Through the above design and technical means, the charging gun achieves functions such as accurate identification of charging connections, enhanced charging safety, improved charging compatibility, simplified circuit design, and improved user experience.

[0071] In one embodiment of the present invention, the electric vehicle includes a second Bluetooth module (BT2), a second 4G module (4G2), a charging cover (CG), a vehicle controller (VCU), R2, R3, S2, D1, an on-board charger (OBC) and on-board battery packs (BATs).

[0072] The working principle of the above technical solution is as follows: the Bluetooth module (BT2) is a wireless communication module based on the 2.4GHz ISM (industrial, scientific, and medical) frequency band, which uses radio signals to transmit information. The BT2 module can communicate with mobile phones, charging piles and other devices via Bluetooth to achieve data transmission and the reception and transmission of control instructions; the 4G module (4G2) is also a wireless communication module, but it supports higher-speed data transmission and is suitable for electric vehicles that require remote data transmission and monitoring. The 4G2 module can exchange data with the cloud server through the mobile communication network, including vehicle status, driving data, etc. The charging cover usually uses a spring mechanism to achieve automatic opening and closing. When charging is required, press the charging cover, the spring is compressed, and the charging port is opened; after charging is completed, the spring returns to its original state and the charging cover automatically closes; the VCU is the core control unit of the electric vehicle, which collects and processes signals from various components of the vehicle, such as the accelerator pedal, brake pedal, motor controller, etc., and then generates corresponding control instructions, which are sent to each subsystem through communication methods such as the CAN bus to achieve precise control of the vehicle. R2 and R3, as resistors, play the role of current limiting, voltage dividing, and protection in the circuit. S2 acts as a switch to control the on and off of the circuit. When S2 is closed, the circuit is connected; when S2 is open, the circuit is disconnected. D1 acts as a diode and has unidirectional conductivity. It allows current to flow from the positive electrode to the negative electrode, but prevents current from flowing in the opposite direction. It plays the role of rectification, detection, and voltage stabilization in the circuit. The on-board charger (OBC) converts AC power into DC power to charge the on-board battery pack of the electric vehicle. It usually has an intelligent control function that can automatically adjust the charging current and voltage according to the battery pack's power and charging requirements. The on-board battery pack (BATs) is the energy storage unit of the electric vehicle, consisting of multiple battery cells connected in series or in parallel. It stores electrical energy and releases it when needed to provide power for the electric vehicle.

[0073] The technical effects of the above technical solution are: realizing wireless data transmission and receiving and sending of control instructions, improving the intelligence and convenience of electric vehicles. Supporting remote data transmission and monitoring, realizing real-time monitoring and data analysis of vehicle status, and improving the safety and reliability of vehicles. Protecting the charging interface from the intrusion of external substances such as dust and moisture to ensure the normal operation of the charging interface. At the same time, the automatic opening and closing design improves the convenience of charging. Realizing precise control of the vehicle and improving the performance and safety of the vehicle. At the same time, by collecting and analyzing vehicle data, providing the driver with rich vehicle status information.

[0074] R2 and R3 (resistors) play the role of current limiting, voltage dividing, and protection in the circuit to ensure the stability and safety of the circuit. S2 (switch) controls the on and off of the circuit to achieve flexible control and protection of the circuit. D1 (diode) plays the role of rectification, detection, and voltage stabilization in the circuit to ensure the normal operation and stability of the circuit. The on-board charger (OBC) converts AC power into DC power to charge the on-board battery pack. At the same time, it has an intelligent control function that can automatically adjust the charging current and voltage according to the battery pack's power and charging requirements to improve charging efficiency and safety. The on-board battery pack (BATs) stores electrical energy and releases it when needed to power electric vehicles. At the same time, the safety and service life of the battery pack are ensured through the intelligent control of the battery management system.

[0075] In one embodiment of the present invention, the first Bluetooth module (BT1) and the first 4G module (4G1) of the household AC charging pile are wirelessly connected with the second Bluetooth module (BT2) and the second 4G module (4G2) of the electric vehicle respectively.

[0076] The working principle of the above technical solution is: the Bluetooth module (BT1) and 4G module (4G1) in the household AC charging pile establish communication with the Bluetooth module (BT2) and 4G module (4G2) of the electric vehicle respectively. The setting of the vehicle signal anti-backflow diode (D2) in the CC detection unit (CC) is to consider the isolation of the detection signal of the main control (MCU) end and the detection signal of the vehicle end to prevent mutual interference after the charging gun is connected to the electric vehicle. When the electric vehicle is close to the household AC charging pile and the Bluetooth modules of both are in a discoverable state, BT1 will search and identify nearby Bluetooth devices, including BT2. Once BT1 establishes a connection with BT2 and passes authentication, data transmission can begin. This includes charging requests, charging status, battery information, etc., as well as possible authentication and authorization information to ensure the safety and legality of the charging process. Bluetooth communication is bidirectional, which means that BT1 can send data to BT2 and vice versa. Both the first 4G module (4G1) and the second 4G module (4G2) are connected to the Internet through a mobile communication network. This means that communication can be carried out across a large geographical distance. 4G communication connections are often used for remote monitoring, data analysis, and fault diagnosis. For example, a charging station can send charging data, fault alarms, and other information to a cloud server via 4G1, while an electric vehicle can receive updates, configuration changes, or emergency notifications from the server via 4G2. 4G communication can also support more complex interactions, such as remotely starting charging and adjusting charging parameters.

[0077] The technical effect of the above technical solution is: through Bluetooth and 4G communication, users can remotely control and monitor the charging process without using physical connection. This greatly improves the convenience of charging, especially in public places or home environments. Wireless communication connection allows two-way authentication and authorization between charging piles and electric vehicles to ensure that only legitimate devices can start charging. This helps prevent unauthorized charging behavior and protect users' property and privacy. By transmitting charging data and status information in real time, charging piles and electric vehicles can jointly optimize the charging process. For example, charging piles can automatically adjust charging current and voltage according to the battery status and charging requirements of electric vehicles to improve charging efficiency and extend battery life. 4G communication connection enables the status of charging piles and electric vehicles to be remotely monitored and analyzed. This helps to discover and solve potential problems in a timely manner, reduce downtime, and improve equipment reliability and availability. Wireless communication connection provides the basis for the intelligence and integration of charging piles and electric vehicles. Through connection with other smart devices and systems, more complex scene applications such as smart home integration and fleet management can be realized.

[0078] In one embodiment of the present invention, the circuit control method includes:

[0079] Power on the main control unit (MCU) of the home AC charging pile to obtain the preset program strategy;

[0080] Scanning and searching for vehicles according to a preset period by using a first Bluetooth module and a first 4G module of a household AC charging pile, and obtaining an electric vehicle that has entered a parking space, wherein the household charging pile is in a dual-channel communication standby mode;

[0081] The main control unit (MCU) of the home AC charging pile automatically connects and authenticates the electric vehicle via Bluetooth or 4G according to the program strategy;

[0082] After authentication, the battery charge information of the electric vehicle is obtained through the home AC charging pile, and charging suggestion information is sent to the electric vehicle according to the battery charge information to obtain user selection information;

[0083] Controlling the opening of the charging cover of the electric vehicle for charging according to the user selection information;

[0084] If the user selection information is not obtained within the preset time, the charging gun button signal is obtained through the CC detection unit (CC) of the home AC charging pile, and a request message is sent to the electric vehicle to request to open the charging cover for charging;

[0085] The home AC charging pile main control unit (MCU) obtains the status of the charging gun and its electrical connection information with the electric vehicle through the CC detection unit (CC) and the CP control guidance unit (CP), and then detects whether the electric vehicle is allowed to charge;

[0086] If the electric vehicle is allowed to charge, the household AC charging pile will actively close the relay unit (J1) according to the strategy program, and the AC power of the power grid (single-phase or three-phase) will be transmitted to the electric vehicle for one-touch opening and charging. Figure 1 shown.

[0087] Obtain the status data of the household AC charging pile, charging gun and electric vehicle during the charging process;

[0088] Calculate the charging pile state coefficient according to the household AC charging pile state data;

[0089] The calculation formula of the charging pile state coefficient is:

[0090]

[0091] Among them, ZT is the charging pile state coefficient, is the charging efficiency coefficient (CEC), E s is the actual electrical energy charged into the battery, E h The electrical energy obtained from the power grid; is a variant of the charge readiness factor, N w To prepare for the completion step, N z is the total preparation step, CCF is the charging connection status factor, which is a binary value (0 or 1) used to indicate whether the charging gun is correctly connected and locked. If the charging gun is connected and locked, CCF=1; otherwise, CCF=0; ΔI and ΔV represent the relative fluctuation amplitude of current and voltage during the charging process, respectively, and I p and V p They are the average current and average voltage during the charging process, and α is the charging pile state adjustment factor, which is set according to the actual situation;

[0092] Compare the charging pile state coefficient with a preset charging pile state threshold range to obtain a charging pile state comparison result;

[0093] According to the comparison result of the charging pile status, the household AC charging pile is judged to be abnormal, and the charging pile abnormality judgment information is obtained;

[0094] Calculating a charging gun state coefficient according to the charging gun state data;

[0095] The calculation formula of the charging gun state coefficient is:

[0096]

[0097] Among them, QT is the charging gun state coefficient, L g is the number of correctly connected interfaces, L z is the total number of interfaces, Gg is the number of undetected faults, G z is the total number of inspections, C s is the actual measured CC resistance value, C y is the expected value of CC resistance, S3 yz is the normally closed micro switch state factor. If S3 is in the normally closed state, then S3 yz is 1; otherwise S3 yz is 0, β is the charging gun state adjustment factor, which is set according to the actual situation;

[0098] Compare the charging gun state coefficient with a preset charging gun state threshold range to obtain a charging gun state comparison result;

[0099] According to the comparison result of the charging gun status, the charging gun is judged to be abnormal, and the charging gun abnormality judgment information is obtained;

[0100] Calculating an electric vehicle state coefficient according to the electric vehicle state data;

[0101] The calculation formula of the electric vehicle state coefficient is:

[0102]

[0103] Among them, DT is the electric vehicle state coefficient, z is the type of electric vehicle state monitoring, U si is the actual monitoring data of the i-th condition monitoring type, U yi is the preset monitoring threshold of the i-th state monitoring data, Q ui is the preset weight data of the i-th state monitoring type, A is the electric vehicle state adjustment factor, which is set according to the actual situation;

[0104] Comparing the electric vehicle state coefficient with a preset electric vehicle state threshold range to obtain an electric vehicle state comparison result;

[0105] Performing abnormality determination on the electric vehicle according to the electric vehicle state comparison result to obtain abnormality determination information of the electric vehicle;

[0106] Calculate the circuit control state coefficient through the charging pile state coefficient, the charging gun state coefficient and the electric vehicle state coefficient;

[0107] The calculation formula of the circuit control state coefficient is:

[0108]

[0109] Among them, ZH is the circuit control state coefficient;

[0110] Compare the circuit control state coefficient with a preset circuit control state threshold range to obtain a circuit control state comparison result;

[0111] According to the circuit control state comparison result, the circuit control is judged abnormally, and the circuit control abnormality judgment information is obtained;

[0112] Issue corresponding warnings based on abnormal judgment information.

[0113] The working principle of the above technical solution is: when the main control (MCU) is powered on, according to the program strategy, the Bluetooth module (BT1) and 4G module (4G1) in the home AC charging pile periodically scan for cars and are in dual-channel communication standby mode. When the electric car enters the parking space, the home AC charging pile main control (MCU) automatically connects to the electric car through Bluetooth or 4G according to the program strategy. After authentication, the home AC charging pile actively queries the battery charge information of the electric car. When it is lower than a certain amount of power, the home AC charging pile actively sends charging suggestions to the electric car through Bluetooth or 4G, and displays it on the on-board computer of the electric car. If the user chooses to agree to charge, the electric car will actively open the charging cover and prompt the user to plug in the charging gun, thereby saving the user the trouble of getting off the car to open the charging cover, providing users with great convenience and a good butler-style charging experience. If the authentication between the charging pile and the electric vehicle fails for some reason, the user can lightly press the button switch on the charging gun head before plugging in the charging gun. At this time, the CC detection unit (CC) of the household AC charging pile detects the button signal and actively requests the electric vehicle to open the charging cover through Bluetooth or 4G. The electric vehicle actively opens the charging cover, thus realizing one-click opening. Afterwards, the user plugs in the charging gun, and the household AC charging pile main control (MCU) detects the status of the charging gun and its electrical connection with the electric vehicle through the CC detection unit (CC) and the CP control guidance unit (CP), and further detects whether the electric vehicle is allowed to charge (after its S2 switch is closed, the CP control guidance unit (CP) will detect a specific signal voltage). If the electric vehicle is allowed to charge, the household AC charging pile actively closes the relay unit (J1) according to the strategy program to realize the transmission of AC power (single-phase or three-phase) from the power grid to the electric vehicle, thus finally realizing one-click opening of the cover for convenient charging, or even button-free smart charging. Due to the wireless communication mechanism of the vehicle pile of the present invention, the household AC charging pile can further obtain the key data such as the charge information, charging progress, battery temperature, battery insulation, etc. of the vehicle battery through the Bluetooth module (BT1) and the 4G module (4G1), so as to realize transparent, digital and visualized charging, and significantly improve the charging experience of the user. The charging pile status data is obtained from the household AC charging pile, including charging efficiency, preparation completion steps, charging connection status, relative fluctuation amplitude of current and voltage, etc. The charging gun status data is obtained from the charging gun, including the number of correctly connected interfaces, the number of undetected faults, the actual measured CC resistance value, the normally closed micro switch status, etc. The electric vehicle status data is obtained from the electric vehicle, including the actual monitoring data of various status monitoring types, such as battery SOC, battery temperature, battery insulation resistance, etc. The charging pile status coefficient (ZT) is calculated using the calculation formula of the charging pile status data, combined with factors such as charging efficiency, preparation status, charging connection status, current and voltage fluctuations, etc.The charging gun status coefficient (QT) is calculated using the calculation formula of the charging gun status data, combined with factors such as the interface connection status, fault detection status, CC resistance value, and micro switch status; the electric vehicle status coefficient (DT) is calculated using the calculation formula of the electric vehicle status data, combined with the actual values ​​and preset thresholds of various status monitoring data, and preset weight data. The charging pile status coefficient is compared with the preset charging pile status threshold. If it is within the abnormal threshold, it is determined that the charging pile is abnormal. The charging gun status coefficient is compared with the preset charging gun status threshold. If it is within the abnormal threshold, it is determined that the charging gun is abnormal. The electric vehicle status coefficient is compared with the preset electric vehicle status threshold. If it is within the abnormal threshold, it is determined that the electric vehicle is abnormal.

[0114] Combine the charging pile state coefficient, charging gun state coefficient and electric vehicle state coefficient, and use the calculation formula of the circuit control state coefficient to calculate the circuit control state coefficient (ZH). Compare the circuit control state coefficient with the preset circuit control state threshold. If it is within the abnormal threshold, it is determined that the circuit control is abnormal. According to the abnormal determination information, corresponding early warning operations are performed, such as issuing an alarm, stopping charging, etc.

[0115] The technical effect of the above technical solution is: it can realize one-key opening and charging of the household AC charging pile, and can obtain the key data such as the charge information, charging progress, battery temperature, battery insulation, etc. of the vehicle battery based on Bluetooth and 4G communication, so as to realize transparent, digital and visual charging, and significantly improve the user's charging experience. In order to solve the common problems in the prior art, the present invention proposes a solution to open the wireless communication system such as Bluetooth and 4G between the charging pile and the electric vehicle, so that the charging pile and the electric vehicle can realize digital communication and intelligent interaction. When the electric vehicle enters the parking space, the charging pile automatically connects to the electric vehicle through Bluetooth or 4G. After authentication, the charging pile actively queries the battery charge information of the electric vehicle. When it is lower than a certain amount of electricity, the charging pile actively sends charging suggestions to the electric vehicle through Bluetooth or 4G, and displays it on the on-board computer of the electric vehicle. If the user chooses to agree to charge, the electric vehicle will actively open the charging cover and prompt the user to plug in the charging gun, thereby saving the trouble of the user getting off the car to open the charging cover, providing users with great convenience and a good butler-style charging experience. If the authentication of the charging pile and the electric vehicle fails for some reason, the user can lightly press the button switch of the charging gun head before plugging in the charging gun. At this time, after the charging pile detects the button signal, it will actively request the electric vehicle to open the charging cover, and the electric vehicle will actively open the charging cover, thereby realizing one-click opening of the cover, and based on the wireless communication between the vehicle and the pile, further realizing the visual charging experience, the user can observe the key data such as the charge information, charging progress, battery temperature, battery insulation, etc. of the vehicle battery on the charging APP, realizing the transparency, digitization and visualization of charging, so that the user can charge quickly without opening the charging cover or opening the cover with one click, which significantly improves the charging experience. Therefore, the proposal and design of this solution effectively solves the problem that the household AC charging pile cannot automatically control the charging cover of the electric vehicle, and solves the problem of digital communication and intelligent interaction between the household AC charging pile and the electric vehicle, realizing the transparency, digitization and safety of charging, with low cost, high technical and economic efficiency, and can be promoted and used on a large scale. By real-time monitoring of the status of the charging pile, charging gun and electric vehicle, potential safety hazards can be discovered and warned in time to avoid the occurrence of safety accidents. By calculating the charging pile status coefficient, the charging efficiency of the charging pile can be evaluated, the problem of low charging efficiency can be discovered and solved in time, and the charging speed and efficiency can be improved. Through real-time monitoring and early warning, users can timely understand the abnormal conditions in the charging process, avoid charging interruptions or delays caused by charging failures, and improve user experience. By timely discovering and warning of abnormal conditions, maintenance and processing can be carried out as soon as possible to avoid the expansion or deterioration of faults and reduce maintenance costs. By incorporating the status data of charging piles, charging guns and electric vehicles into a unified monitoring and management system, intelligent management of the charging process can be achieved, and management efficiency and accuracy can be improved.

[0116] In one embodiment of the present invention, the home AC charging pile main control unit (MCU) obtains the status of the charging gun and its electrical connection information with the electric vehicle through the CC detection unit (CC) and the CP control guidance unit (CP), and then detects whether the electric vehicle is allowed to charge, including:

[0117] When S3 is pressed, the switch state changes from on to off, resistor R4 is effective, and the total resistance in the CC resistor network = R4 + RC;

[0118] When S3 is not pressed, the switch remains in the on state, the state of resistor R4 is the same as the state of the wire, resistor R4 is invalid, and the total resistance in the CC resistor network = resistor RC;

[0119] The different resistance values ​​generated by the CC resistance network in the charging gun are obtained through the pressed or not pressed state information of the normally closed micro switch (S3), and the main control (MCU) obtains the resistance value change data.

[0120] The working principle of the above technical solution is: when S3 is pressed, its switch state changes from on to off, and resistor R4 is effective, so that the total resistance in the CC resistor network = R4 + RC. When S3 is not pressed, its switch state remains on, and resistor R4 is equivalent to a wire and is invalid, so that the total resistance in the CC resistor network is only resistor RC. By pressing or not pressing the normally closed micro switch (S3), the CC resistor network in the charging gun produces different resistance values. Due to the circuit connection and control relationship, the change in this resistance value can be detected by the main control (MCU).

[0121] The technical effect of the above technical solution is: the total resistance value in the CC resistor network can be dynamically adjusted by pressing (disconnecting) and not pressing (connecting) the normally closed micro switch (S3). When S3 is pressed, it is converted from the on state to the off state, and the resistor R4 is effective in the circuit. At this time, the total resistance of the CC resistor network is the series value of R4 and RC (R4+RC). When S3 is not pressed, it remains in the on state, and the resistor R4 is equivalent to a wire in the circuit, and its contribution to the total resistance can be ignored. At this time, the total resistance of the CC resistor network is only RC. This method of dynamically adjusting the resistance value enables the charging gun to send different resistance signals to the charging pile through the CC resistor network when it is inserted into the charging pile. The main control (MCU) of the charging pile can more accurately identify whether the charging gun has been correctly inserted by detecting the change of this resistance signal, and can distinguish whether it is the first insertion or the state change after the connection has been established. Through the design of the normally closed micro switch (S3), charging safety problems caused by misoperation or abnormal conditions can be prevented to a certain extent. For example, if the charging gun encounters resistance or is not fully inserted during insertion, the micro switch may not be fully triggered, resulting in no change in resistance value. At this time, the charging pile can detect this abnormality and take corresponding safety measures, such as stopping charging or issuing a warning. During the charging process, if the main control (MCU) detects an abnormal change in the resistance value of the CC resistor network (for example, it does not change as expected or the change range exceeds the normal range), this may indicate that there is a fault in the charging gun or charging pile. This design enables the system to provide additional fault diagnosis information, which helps maintenance personnel to quickly locate and solve the problem. Through the combination design of a simple normally closed micro switch (S3) and a resistor network, the dynamic identification and fault diagnosis functions of the charging connection status are realized, while maintaining the simplicity and reliability of the circuit design. This design not only reduces the manufacturing cost, but also improves the overall performance and user experience of the charging gun. The normally closed micro switch (S3) in the charging gun and its use in conjunction with the CC resistor network achieves technical effects such as dynamically adjusting the resistance value to confirm the charging status, improving the accuracy of charging connection identification, enhancing the safety of the charging process, providing additional fault diagnosis information, and simplifying the circuit design while improving the function.

[0122] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A home charging station with one-touch opening and visual charging, characterized by: The household charging pile includes a pile end and a vehicle end; The pile end includes a household AC charging pile, a charging gun and a wire; The vehicle end includes an electric vehicle; The household AC charging pile and the electric vehicle are connected in bidirectional communication; The charging gun is connected to the household AC charging pile and the electric vehicle respectively through wires; Wherein, the household AC charging pile includes a main control, a first Bluetooth module, a first 4G module, a CC detection unit, a CP control guidance unit, a relay unit and a wire; Wherein, the CC detection unit includes the 3.3V positive terminal of the main control, the CC detection resistor, the pile end CC signal detection point, the vehicle signal anti-backflow diode and the wire; One end of the CC detection resistor is connected to the 3.3V positive terminal of the main control power supply through a wire, and the other end is connected in series with the vehicle signal anti-backflow diode; The CC signal detection point at the pile end is the common point of the series connection and is connected to the detection circuit inside the main control through a wire; The CP control guidance unit includes a 12V positive terminal of the main control, a main control maximum charging capacity signal, a CP detection resistor, a charging connection confirmation signal detection point and a wire; The 12V positive terminal and the maximum charging capacity signal of the master control are switched and connected with the CP detection resistor in a preset charging connection state by the master control according to a preset program strategy; The charging connection confirmation signal detection point is taken from the middle point where the CP detection resistor is connected to the electric vehicle through the charging gun; The relay unit includes a grid input, a relay and an output wire; The main control is connected to the first Bluetooth module and the first 4G module respectively through the serial port; The main control is connected to the CC detection unit, the CP control guidance unit and the relay unit respectively through wires; The detection signal and control signal output terminals of the main control are respectively connected to the detection signal and control signal input terminals of the CC detection unit, the CP control guidance unit and the relay unit.

2. The household charging pile with one-touch cover opening and visual charging according to claim 1, characterized in that: According to the household charging pile with one-button cover opening and visual charging according to claim 1, it is characterized in that the charging gun includes a CC resistor network, a normally closed micro switch and a wire; The CC resistor network includes a series connection structure of resistors R4 and RC, one end of the CC resistor network is connected to the wire PE, and the other end after the series connection is respectively connected to the cathode of the vehicle signal anti-backflow diode of the CC detection unit of the household AC charging pile and the vehicle end; The normally closed micro switch is connected in parallel with the resistor R4.

3. The household charging pile with one-touch cover opening and visual charging according to claim 1, characterized in that: The electric vehicle includes a second Bluetooth module, a second 4G module, a charging cover, a vehicle controller, an on-board charger and an on-board battery pack.

4. The household charging pile with one-touch cover opening and visual charging according to claim 1, characterized in that: The first Bluetooth module and the first 4G module of the household AC charging pile are wirelessly connected with the second Bluetooth module and the second 4G module of the electric vehicle respectively.

5. A circuit control method for a household charging pile with one-key opening and visual charging as claimed in claim 1, characterized in that: The circuit control method comprises: Power on the main control of the home AC charging pile to obtain the preset program strategy; Scanning and searching for vehicles according to a preset period by using a first Bluetooth module and a first 4G module of a household AC charging pile, and obtaining an electric vehicle that has entered a parking space, wherein the household charging pile is in a dual-channel communication standby mode; The master control of the home AC charging pile automatically connects and authenticates the electric vehicle via Bluetooth or 4G according to the program strategy; After authentication, the battery charge information of the electric vehicle is obtained through the home AC charging pile, and charging suggestion information is sent to the electric vehicle according to the battery charge information to obtain user selection information; Controlling the opening of the charging cover of the electric vehicle for charging according to the user selection information; If the user selection information is not obtained within the preset time, the charging gun button signal is obtained through the CC detection unit of the home AC charging pile, and a request message is sent to the electric vehicle to request to open the charging cover for charging; The home AC charging pile master controller obtains the status of the charging gun and its electrical connection information with the electric vehicle through the CC detection unit and the CP control guidance unit, and then detects whether the electric vehicle is allowed to charge; If the electric vehicle is allowed to charge, the household AC charging pile will actively close the relay unit according to the strategy program, and the AC power of the power grid will be transmitted to the electric vehicle for one-click charging.

6. The circuit control method of the household charging pile with one-key opening and visual charging according to claim 5 is characterized in that: The home AC charging pile master controller obtains the status of the charging gun and its electrical connection information with the electric vehicle through the CC detection unit and the CP control guidance unit, and then detects whether the electric vehicle is allowed to charge, including: When S3 is pressed, the switch state changes from on to off, resistor R4 is effective, and the total resistance in the CC resistor network = R4 + RC; When S3 is not pressed, the switch remains in the on state, the state of resistor R4 is the same as the state of the wire, resistor R4 is invalid, and the total resistance in the CC resistor network = resistor RC; The different resistance values ​​generated by the CC resistor network in the charging gun are obtained through the pressed or not pressed status information of the normally closed micro switch, and the main control obtains the resistance value change data.

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