AC V2G charging pile based on LIN bus communication

Abstract

The utility model provides a kind of AC V2G charging pile based on LIN bus communication, including main control board, car stake communication module, 4G module, LED lamp plate and circuit system, the main control board is equipped with main control chip, the main control board is equipped with car stake communication module, car stake communication module is equipped with digital interface inside, main control chip is connected with digital interface, car stake communication module is equipped with CP line outside, the main control board is electrically connected with 4G module, LED lamp plate, circuit system.The utility model is composed of main control board, 4G module, car stake communication module and LED lamp plate, and form digital communication link between charging pile and vehicle by CP line, reduce traditional multiple hardware complex structure, overall easy to produce and maintain, reduce manufacturing cost and later maintenance cost, make the cost of AC V2G charging pile, more in line with market operation and management.

Description

Technical Field

[0001] This utility model belongs to the field of charging pile technology and relates to an AC V2G charging pile based on LIN bus communication. Background Technology

[0002] With the growth of electric vehicle ownership and the development of smart grids, the concept of V2G (vehicle-to-grid) has been proposed. Its core is to enable electric vehicles to become mobile distributed energy storage units and participate in grid dispatch. Currently, DC V2G is the mainstream demonstration project, but DC V2G solutions are extremely expensive.

[0003] Therefore, designing a V2G charging station that can reduce the cost of the solution has become an urgent need. Utility Model Content

[0004] This invention provides an AC V2G charging station based on LIN bus communication, aiming to reduce the cost of the solution.

[0005] To achieve the above objectives, this utility model provides an AC V2G charging pile based on LIN bus communication, including a main control board, a vehicle-to-charging pile communication module, a 4G module, an LED light board, and a circuit system. The main control board is equipped with a main control chip and a vehicle-to-charging pile communication module. The vehicle-to-charging pile communication module has an internal digital interface, and the main control chip is connected to the digital interface. The vehicle-to-charging pile communication module has an external CP line, and the main control board is electrically connected to the 4G module, the LED light board, and the circuit system.

[0006] Preferably, the main control board integrates an SWD interface, a debug serial port, a backup power supply, a USB interface, a DATA FLASH interface, an indicator light interface, a reset circuit interface, and a mode selection interface. The main control chip is electrically connected to the SWD interface, debug serial port, backup power supply, USB interface, DATA FLASH interface, indicator light interface, reset circuit interface, and mode selection interface.

[0007] Preferably, the main control chip is model GD32F407VET6.

[0008] Preferably, the LED light panel is provided with blue indicator lights, green indicator lights, and red indicator lights to indicate different states.

[0009] Preferably, the vehicle-to-pile communication module is connected to the vehicle communication controller via a CP line for physical handshake with the vehicle communication controller.

[0010] Preferably, the circuit system includes a signal acquisition circuit, a relay circuit, and an AC sampling circuit, and the main control board is electrically connected to the signal acquisition circuit, the relay circuit, and the AC sampling circuit.

[0011] Preferably, the signal acquisition circuit includes a CP_PWM signal input terminal, a CC signal acquisition terminal, a transistor Q9, a diode D16, a diode D17, a resistor R285, and a resistor R289. The CP_PWM signal input terminal is connected to the resistor R285. The two ends of the diode D16 are connected to the resistor R285 and the collector of the transistor Q9, respectively. The collector of the transistor Q9 leads out a CP signal output terminal, which is connected to pin 47 of the main control chip. The CC signal acquisition terminal is connected to the resistor R289A. The two ends of the diode D17 are connected to the resistor R289 and the base of the transistor Q9, respectively. The emitter of the transistor Q9 is grounded.

[0012] Preferably, the relay circuit includes relay RLY1 and relay RLY2. Pin 2 of relay RLY1 is connected to the L_OUT terminal, and pin 3 of relay RLY1 is connected to the L_IN terminal. The main control chip is used to control the connection and disconnection of the live wire circuit between the L_OUT terminal and the L_IN terminal of relay RLY1. Pin 2 of relay RLY2 is connected to the N_OUT terminal, and pin 3 of relay RLY2 is connected to the ACN terminal. The main control chip is used to control the connection and disconnection of the neutral wire circuit between the N_OUT terminal and the ACN terminal of relay RLY2.

[0013] Preferably, the AC sampling circuit includes a chip U33, a current transformer T2, a resistor R56, a resistor R65, and a resistor network. Pin 2 of the chip U33 is connected to pin 1 of the current transformer T2 through resistor R56, pin 3 of the chip U33 is connected to pin 2 of the current transformer T2 through resistor R65, pin 3 of the chip U33 is connected to one end of the current transformer T2 through the resistor network, and the other end of the current transformer T2 is connected to the L_IN terminal through the resistor network.

[0014] The advantages of this utility model over the prior art are: This utility model provides an AC V2G charging pile based on LIN bus communication, which consists of a main control board, a 4G module, a vehicle-to-charging-pile communication module and an LED light board. It forms a digital communication link between the charging pile and the vehicle through a CP line, reducing the complexity of traditional multi-hardware structures. The overall structure is easier to produce and maintain, reducing manufacturing and maintenance costs, and making the cost of AC V2G charging piles more in line with market operation and management.

[0015] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the charging pile connection structure of this utility model; Figure 2 This is the circuit diagram of the main control chip in this utility model; Figure 3 The main control board of this utility model integrates multiple circuits. Figure 1 ; Figure 4 This is a circuit diagram of the relay circuit in this utility model; Figure 5 This is a circuit diagram of the signal acquisition circuit in this utility model; Figure 6 This is a circuit diagram of the AC sampling circuit in this utility model; Figure 7 The main control board of this utility model integrates multiple circuits. Figure 2 ; Figure 8 The main control board of this utility model integrates multiple circuits. Figure 3 ; Detailed Implementation

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0018] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0019] To achieve the above objectives, this utility model provides an AC V2G charging pile based on LIN bus communication, see reference. Figure 1-8 As shown, it includes a main control board, a vehicle-to-pile communication module, a 4G module, an LED light board, and a circuit system. The main control board is equipped with a main control chip and a vehicle-to-pile communication module. The vehicle-to-pile communication module has an internal digital interface. The main control chip is connected to the digital interface. The vehicle-to-pile communication module has an external CP line. The main control board is electrically connected to the 4G module, the LED light board, and the circuit system.

[0020] In this embodiment, the charging pile consists of a main control board, a 4G module, a vehicle-to-pile communication module, and an LED light board. The main control chip is model GD32F407VET6, which can be used for V2G energy management, charging and discharging process control, communication protocol processing, safety monitoring and protection, state machine and business process management, and realize the collaborative work of various modules of the charging pile. The main control board integrates an SWD interface, a debugging serial port, a backup power supply, a USB interface, a DATA FLASH interface, an indicator light interface, a reset circuit interface, and a mode selection interface. The main control chip is electrically connected to the SWD interface, the debugging serial port, the backup power supply, the USB interface, the DATA FLASH interface, the indicator light interface, the reset circuit interface, and the mode selection interface.

[0021] Furthermore, the vehicle-to-charging communication module consists of hardware such as a coupling transformer ECUST35502, a high-efficiency 1.5MHz 2A synchronous step-down regulator, a 25MHz crystal oscillator, a CH395A Ethernet chip, and a network transformer HR601680. It communicates with the vehicle-to-charging communication controller, enabling bidirectional communication, power negotiation, security encryption, and plug-and-charge functionality. The specific power negotiation process is as follows: The vehicle sends its maximum charging / discharging power and other capability parameters to the charging pile's main control board via the LIN bus; Based on grid dispatch instructions or local strategies, the main control board calculates the final execution power within the vehicle's capabilities. The main control board sends explicit charging or discharging power commands to the vehicle via the LIN bus; The vehicle adjustment system executes the command, during which the main control board can adjust the power in real time as needed, and the vehicle must respond.

[0022] The encryption mechanism is as follows: a complete software security protocol based on public key infrastructure and symmetric encryption is implemented at the application layer. The communication method is LIN bus. LIN bus reuses the CP line for transmission. On the basis of the original analog signal function of the CP line, a digital communication signal is superimposed.

[0023] Furthermore, the vehicle-to-charging-pile communication module is connected to the vehicle communication controller via a CP line for physical handshake. Specifically, the vehicle-to-charging-pile communication module is connected to a charging gun via the CP line. The charging gun is used to insert into the vehicle's vehicle communication controller, enabling the charging pile to connect to the vehicle. The CP line serves as a digital communication channel between the charging pile and the vehicle based on the LIN bus. Compared to traditional DC V2G, this embodiment uses the LIN bus for data transmission, which greatly simplifies wiring, reduces hardware costs, and thus lowers the overall solution cost.

[0024] Furthermore, the LED light board is equipped with blue, green, and red indicator lights to indicate different states. The control signal for the LED light board comes from the main control board. Different states of the charging pile correspond to different colors. For example, the LED light board displays blue when the charging pile is powered on, green when the charging pile starts charging or discharging, and red when the charging pile malfunctions.

[0025] Further reference Figure 4-6 As shown, the circuit system includes a signal acquisition circuit, a relay circuit, and an AC sampling circuit, and the main control board is electrically connected to the signal acquisition circuit, the relay circuit, and the AC sampling circuit.

[0026] The signal acquisition circuit includes a CP_PWM signal input terminal, a CC signal acquisition terminal, a transistor Q9, a diode D16, a diode D17, a resistor R285, and a resistor R289. The CP_PWM signal input terminal is connected to the resistor R285. The two ends of the diode D16 are connected to the resistor R285 and the collector of the transistor Q9, respectively. The collector of the transistor Q9 leads out a CP signal output terminal, which is connected to pin 47 of the main control chip. The CC signal acquisition terminal is connected to the resistor R289A. The two ends of the diode D17 are connected to the resistor R289 and the base of the transistor Q9, respectively. The emitter of the transistor Q9 is grounded.

[0027] The relay circuit includes relays RLY1 and RLY2. Pin 2 of relay RLY1 is connected to the L_OUT terminal, and pin 3 of relay RLY1 is connected to the L_IN terminal. The main control chip is used to control the connection and disconnection of the live wire circuit between the L_OUT and L_IN terminals of relay RLY1. Pin 2 of relay RLY2 is connected to the N_OUT terminal, and pin 3 of relay RLY2 is connected to the ACN terminal. The main control chip is used to control the connection and disconnection of the neutral wire circuit between the N_OUT and ACN terminals of relay RLY2.

[0028] The AC sampling circuit includes a chip U33, a current transformer T2, resistors R56 and R65, and a resistor network. Pin 2 of the chip U33 is connected to pin 1 of the current transformer T2 through resistor R56, pin 3 of the chip U33 is connected to pin 2 of the current transformer T2 through resistor R65, pin 3 of the chip U33 is connected to one end of the current transformer T2 through the resistor network, and the other end of the current transformer T2 is connected to the L_IN terminal through the resistor network.

[0029] In one embodiment, a user initiates a discharge or charge command through a charging pile. After receiving the command, the main control board controls the LED light panel to display the corresponding status. The main control board exchanges data with the vehicle communication controller and sends control commands through the vehicle-to-pile communication module and LIN bus. The 4G module ensures that the charging pile always maintains an internet connection. When the vehicle is ready and begins discharging or charging, the main control board is responsible for monitoring the entire process, adjusting the power demand in real time through the vehicle-to-pile communication module, and reporting the data through the 4G module. When completion or a fault occurs, the main control board will first notify the vehicle to stop through the vehicle-to-pile communication module, then control the internal relay to disconnect, and the LED light panel will display the end or fault status. The 4G module will report the final session data to the background.

[0030] In summary, this utility model provides an AC V2G charging pile based on LIN bus communication, which consists of a main control board, a 4G module, a vehicle-to-charging-pile communication module, and an LED light board. It forms a digital communication link between the charging pile and the vehicle through a CP line, reducing the complexity of traditional multi-hardware structures. The overall structure is easier to produce and maintain, reducing manufacturing and maintenance costs, and making the cost of AC V2G charging piles more in line with market operation and management.

[0031] The technical principles of this utility model have been described above with reference to specific embodiments, which are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments; all technical solutions falling within the scope of this utility model's concept are protected. Other specific embodiments of this utility model that can be conceived by those skilled in the art without creative effort will also fall within the protection scope of this utility model.

Claims

1. An AC V2G charging pile based on LIN bus communication, characterized in that, It includes a main control board, a vehicle-to-pile communication module, a 4G module, an LED light board, and a circuit system. The main control board is equipped with a main control chip and a vehicle-to-pile communication module. The vehicle-to-pile communication module has an internal digital interface. The main control chip is connected to the digital interface. The vehicle-to-pile communication module has an external CP line. The main control board is electrically connected to the 4G module, the LED light board, and the circuit system.

2. The AC V2G charging pile based on LIN bus communication according to claim 1, characterized in that, The main control board integrates an SWD interface, a debug serial port, a backup power supply, a USB interface, a DATA FLASH interface, an indicator light interface, a reset circuit interface, and a mode selection interface. The main control chip is electrically connected to the SWD interface, debug serial port, backup power supply, USB interface, DATA FLASH interface, indicator light interface, reset circuit interface, and mode selection interface.

3. The AC V2G charging pile based on LIN bus communication according to claim 1, characterized in that, The main control chip is model GD32F407VET6.

4. The AC V2G charging pile based on LIN bus communication according to claim 1, characterized in that, The LED light panel is equipped with blue, green, and red indicator lights to indicate different states.

5. The AC V2G charging pile based on LIN bus communication according to claim 1, characterized in that, The vehicle-to-pile communication module is connected to the vehicle communication controller via a CP line for physical handshake with the vehicle communication controller.

6. The AC V2G charging pile based on LIN bus communication according to claim 1, characterized in that, The circuit system includes a signal acquisition circuit, a relay circuit, and an AC sampling circuit. The main control board is electrically connected to the signal acquisition circuit, the relay circuit, and the AC sampling circuit.

7. The AC V2G charging pile based on LIN bus communication according to claim 6, characterized in that, The signal acquisition circuit includes a CP_PWM signal input terminal, a CC signal acquisition terminal, a transistor Q9, a diode D16, a diode D17, a resistor R285, and a resistor R289. The CP_PWM signal input terminal is connected to the resistor R285. The two ends of the diode D16 are connected to the resistor R285 and the collector of the transistor Q9, respectively. The collector of the transistor Q9 leads out a CP signal output terminal, which is connected to pin 47 of the main control chip. The CC signal acquisition terminal is connected to the resistor R289A. The two ends of the diode D17 are connected to the resistor R289 and the base of the transistor Q9, respectively. The emitter of the transistor Q9 is grounded.

8. The AC V2G charging pile based on LIN bus communication according to claim 6, characterized in that, The relay circuit includes relays RLY1 and RLY2. Pin 2 of relay RLY1 is connected to the L_OUT terminal, and pin 3 of relay RLY1 is connected to the L_IN terminal. The main control chip is used to control the connection and disconnection of the live wire circuit between the L_OUT and L_IN terminals of relay RLY1. Pin 2 of relay RLY2 is connected to the N_OUT terminal, and pin 3 of relay RLY2 is connected to the ACN terminal. The main control chip is used to control the connection and disconnection of the neutral wire circuit between the N_OUT and ACN terminals of relay RLY2.

9. The AC V2G charging pile based on LIN bus communication according to claim 8, characterized in that, The AC sampling circuit includes a chip U33, a current transformer T2, resistors R56 and R65, and a resistor network. Pin 2 of the chip U33 is connected to pin 1 of the current transformer T2 through resistor R56, pin 3 of the chip U33 is connected to pin 2 of the current transformer T2 through resistor R65, pin 3 of the chip U33 is connected to one end of the current transformer T2 through the resistor network, and the other end of the current transformer T2 is connected to the L_IN terminal through the resistor network.

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