Integrated charging gun

Abstract

The integrated charging gun comprises a gun head, a three-dimensional printed circuit board assembly and a gun body, the gun head is fixedly connected with the three-dimensional printed circuit board assembly, and the three-dimensional printed circuit board assembly is installed in the gun body and connected with the gun body through a containing structure; the three-dimensional printed circuit board assembly comprises a bottom plate, a side plate and an interaction plate, two parallel sides of the side plate are respectively connected with the bottom plate and the interaction plate, a power supply input interface on the bottom plate is connected with a charging line of an external power grid, a power supply output interface is connected with a power supply input end of an external vehicle, and the interaction plate is at least provided with an interaction device for starting charging; the bottom plate is provided with a first voltage-current converter, and the side plate is provided with a second voltage-current converter and a main controller connected with a plurality of electric elements. The technical problems that in an existing 7kW power charging pile technology, a charging pile for charging an electric vehicle is large in occupied space, and the production cost of a whole charging system is high are solved.

Description

Technical Field

[0001] The present invention relates to the field of vehicles, and in particular to an integrated charging gun. Background Art

[0002] In the prior art, household charging piles in the new energy market are mainly AC charging piles of 7kW, charging mode 3, and connection mode C. However, these charging piles all adopt the charging layout strategy of power grid-charging pile box-charging plug-charging socket for charging, such as Figure 2 As shown, this type of charging pile must fix the charging pile body box on the wall or pour cement on the ground to install the charging pile base and charging pile bracket to meet the requirements of installing a fixed charging pile. The charging piles used in the prior art occupy a large space, have many parts and are costly. Summary of the invention

[0003] Based on the above problems, the present invention proposes an integrated charging gun, which solves the technical problems in the existing 7kW power charging pile technology that the charging pile for charging electric vehicles occupies a large space and the production cost of the entire charging system is high. The integrated charging gun provided by the present invention takes up a small space, has a high degree of integration and a low production cost while keeping the power unchanged.

[0004] The present invention provides an integrated charging gun, comprising:

[0005] A gun head, a three-dimensional printed circuit board assembly and a gun body, wherein the gun head is fixedly connected to the three-dimensional printed circuit board assembly, and the three-dimensional printed circuit board assembly is installed in the gun body and connected to the gun body through a containing structure;

[0006] The three-dimensional printed circuit board assembly includes: a bottom plate, a side plate and an interactive plate, wherein two parallel sides of the side plate are respectively connected to the bottom plate and the interactive plate, a power input interface on the bottom plate is connected to a charging line of an external power grid, a power output interface is connected to a power input terminal of an external vehicle, and at least an interactive device for starting charging is installed on the interactive plate;

[0007] A first voltage-current converter is arranged on the bottom plate, a second voltage-current converter and a main controller connected to a plurality of electrical components are arranged on the side plate, an input end of the first voltage-current converter is connected to a charging line of an external power grid, an output end is connected to at least one electrical component of the side plate, an input end of the second voltage-current converter is connected to an output end of the first voltage-current converter, and an output end of the second voltage-current converter is connected to a plurality of electrical components on the side plate and the interactive plate.

[0008] In addition, the side panels are connected to the bottom panel and the interactive panel by using pin headers.

[0009] In addition, the interaction device for starting charging is a contact interaction device or a contactless interaction device.

[0010] In addition, the contact interaction device is an IC card detection circuit.

[0011] In addition, the contactless interaction device is a Bluetooth detection module or a 5G automatic sensing chip module.

[0012] In addition, a residual current protection device and a relay are provided on the bottom plate, and the residual current protection device and the relay are sequentially connected between the power input interface and the power output interface on the bottom plate;

[0013] The residual current protection device detects whether the charging line of the external power grid has leakage. If so, it reports to the main controller. The relay is used to receive instructions from the main controller and control the conduction between the power input interface and the power output interface on the baseboard according to the instructions.

[0014] In addition, the relay is a magnetic double-contact L / N relay.

[0015] In addition, the relay is arranged on the bottom plate at a position close to the gun head.

[0016] In addition, a main power current and voltage sampling module is arranged at a position corresponding to the relay on the bottom plate, for sampling the voltage and current of the power input port of the bottom plate.

[0017] In addition, buttons and indicator lights are installed on the interactive board, and the buttons, the interactive device for starting charging and the indicator lights are arranged in sequence from the gun head to the gun body.

[0018] The present invention solves the technical problems in the existing 7kW power charging pile technology that the charging pile for charging electric vehicles occupies a large space and the production cost of the entire charging system is high. The integrated charging gun provided by the present invention occupies a small space, has a high degree of integration and a low production cost while maintaining the power unchanged. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of an integrated charging gun provided by an embodiment of the present invention before installation;

[0020] Figure 2 It is a schematic diagram of a charging pile and a charging gun in the prior art;

[0021] Figure 3 A schematic diagram of an integrated charging gun after installation provided by an embodiment of the present invention;

[0022] Figure 4 for Figure 3 perspective drawing;

[0023] Figure 5 A schematic diagram of the wiring harness of an integrated charging gun provided in one embodiment of the present invention;

[0024] Figure 6 A schematic diagram of a three-dimensional printed circuit board assembly of an integrated charging gun provided by one embodiment of the present invention;

[0025] Figure 7 A schematic diagram of the current flow in a three-dimensional printed circuit board assembly of an integrated charging gun provided in one embodiment of the present invention;

[0026] Figure 8 A schematic diagram of the current flow in a three-dimensional printed circuit board assembly of an integrated charging gun provided in one embodiment of the present invention;

[0027] Fig. 9 A schematic diagram of voltage conversion of a first voltage-to-current converter in a three-dimensional printed circuit board assembly of an integrated charging gun provided by one embodiment of the present invention;

[0028] Fig.10 A schematic diagram of voltage conversion of a second voltage-to-current converter in a three-dimensional printed circuit board assembly of an integrated charging gun provided by one embodiment of the present invention;

[0029] Fig.11 An overall schematic diagram of a three-dimensional printed circuit board assembly of an integrated charging gun provided by one embodiment of the present invention;

[0030] Fig.12 A schematic diagram of an interactive board of an integrated charging gun provided by an embodiment of the present invention;

[0031] Fig.13 A circuit diagram of an interactive board of an integrated charging gun provided in accordance with an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with specific embodiments and drawings. It is only intended to elaborate on the specific embodiments of the present invention and does not impose any limitation on the present invention. The protection scope of the present invention shall be subject to the claims.

[0033] Reference Figure 1-Figure 10 The present invention provides an integrated charging gun, comprising:

[0034] A gun head 1, a three-dimensional printed circuit board assembly 2 and a gun body 3, wherein the gun head 1 is fixedly connected to the three-dimensional printed circuit board assembly 2, and the three-dimensional printed circuit board assembly 2 is installed in the gun body 3 and connected to the gun body 3 through a receiving structure;

[0035] The three-dimensional printed circuit board assembly 2 includes: a bottom plate 21, a side plate 22 and an interactive plate 23, wherein two parallel sides of the side plate 22 are respectively connected to the bottom plate 21 and the interactive plate 23, a power input interface on the bottom plate 21 is connected to a charging line of an external power grid, a power output interface is connected to a power input terminal of an external vehicle, and at least an interactive device 231 for starting charging is installed on the interactive plate 23;

[0036] The bottom plate 21 is provided with a first voltage-current converter, the side plate 22 is provided with a second voltage-current converter and a main controller 221 (such as a main controller 221) connected to a plurality of electrical components. Figure 6 As shown), the input end of the first voltage-current converter is connected to the charging line of the external power grid, and the output end is connected to at least one electrical component of the side panel, the input end of the second voltage-current converter is connected to an output end of the first voltage-current converter, and the output end of the second voltage-current converter is connected to multiple electrical components on the side panel 22 and the interactive panel 23.

[0037] Optionally, the side plate may be referred to as an auxiliary source plate.

[0038] The present embodiment provides a new type of Mode 3 and 7kW integrated AC charging gun. Through a highly integrated circuit solution, the functional circuit module for charging in the charging pile box is arranged into the cavity of the charging gun, and the functional circuit module is redesigned based on the shape and accommodation space of the charging gun. Compared with the prior art, the present embodiment provides a completely different design solution, which eliminates the "charging pile box" of the entire charging pile system, reduces the charging pile box components, saves the mold fee and material cost of the entire module, and reduces the installation of a charging pile box on the wall and the installation of a column during installation, reducing labor costs and material costs. The technical solution provided by the present embodiment only requires connecting the wiring harness to the external power grid, which is not only convenient but also saves installation space. The present embodiment provides a brand-new integrated charging gun.

[0039] The description of the charging method for 7kW, charging mode 3, connection method C is as follows:

[0040] 7kW: refers to the rated output power of the charging pile is 7 kilowatts. This means that under ideal conditions, 7 kWh of electricity can be charged into the electric vehicle battery per hour. Generally speaking, a 7kW charging pile is an AC slow charging pile, which is suitable for use in homes, community parking lots and other scenarios, and can meet the charging needs of electric vehicles at night or when parked for a long time.

[0041] Charging mode 3: is a charging method that directly connects the electric vehicle to the AC power grid. In this mode, a dedicated power supply device is used on the power supply side connected to the power grid, and a control and guidance device is installed on the dedicated power supply device. Single-phase or three-phase power supply can be used. The charging current cannot exceed 32A when single-phase power supply is used, and the current can be greater than 32A when three-phase power supply is used. This charging mode requires a residual current protection function, which can achieve safer, more stable and efficient charging control. It is often used in public charging piles and some home charging piles.

[0042] Connection method C: refers to the use of a cable assembly with a vehicle plug that is permanently connected to the power supply equipment when connecting the electric vehicle to the power supply network. The advantage of this connection method is that the cable assembly is fixedly connected to the power supply equipment, reducing problems such as poor contact caused by frequent plugging and unplugging, and improving the reliability and safety of charging. It is often used in some fixed charging pile facilities.

[0043] In this embodiment, the bottom plate 21 ( Figure 6 As shown in the figure, the main power board can pass 220VAC / 32A of high power, and can also pass other high power; the side board 22 (the vertical board on the side) is a low-voltage 12V / 5V power board and a main control board, which passes a low-voltage and low-current auxiliary source control power supply for logic control, sampling and driving functions; the top board is an interactive board 23, which passes a low-voltage and low-current auxiliary source power supply for interactive operations with users (for example, interacting with users through buttons, display lights, swiping cards, etc.).

[0044] The electrical explanation of the three-board design: The three-board arrangement can achieve isolation of high and low voltages, preventing the high voltage of the high-voltage circuit board from breaking through the low-voltage board. The bottom board carries high voltage and high current, the side board carries low voltage and low current, and the interactive board carries low voltage and low current.

[0045] The design layout of the three boards is explained in terms of user hand-held and human-machine aspects: through the front and back layout settings, ensure that users do not interfere with each other when plugging and unplugging guns, pressing buttons, swiping cards after plugging guns, and checking indicator lights during charging. Since high-power components are set on the bottom plate, they will generate heat, so the high-power components on the bottom plate are arranged near the gun head, away from the position where the user holds the charging gun, avoiding the user's discomfort of holding the charging gun and feeling the heat. The interactive board is arranged at the top, which is convenient for swiping cards, pressing operation buttons, and checking the charging status indicator light.

[0046] In this embodiment, the installation order of the gun head 1, the three-dimensional printed circuit board assembly 2 and the gun body 3 is as follows: the three-dimensional printed circuit board assembly 2 is first connected to the gun head 1, and then inserted into the gun body 3, and the wiring harness of the power output interface on the three-dimensional printed circuit board assembly 2 is inserted into the tail of the gun body 3 (such as Figure 5As shown). Optionally, a circular hole is provided at the edge of the three-dimensional printed circuit board assembly 2, and the three-dimensional printed circuit board assembly 2 is fixed to the gun head 1 through the circular hole. Optionally, the number of the circular holes is 3. The three-dimensional printed circuit board assembly 2 is installed in the gun body 3 and connected to the gun body 3 through the receiving structure. Optionally, a card slot is provided inside the gun body 3, and the three-dimensional printed circuit board assembly 2 is embedded in the card slot. Optionally, the gun body 3 is also provided with multiple other card slots or buckles according to the specific shape of the three-dimensional printed circuit board assembly 2 to stabilize the three-dimensional printed circuit board assembly 2.

[0047] Optionally, a slot is also provided at the rear end of the gun body 3 to fix the wiring harness.

[0048] The three-dimensional printed circuit board assembly 2 includes: a bottom plate 21, a side plate 22 and an interactive plate 23. The two parallel sides of the side plate 22 are respectively connected to the bottom plate 21 and the interactive plate 23. The power input interface on the bottom plate 21 is connected to the charging line of the external power grid, and the power output interface is connected to the power input end of the external vehicle. At least an interactive device 231 for starting charging is installed on the interactive plate 23; the live wire, the neutral wire, and the ground wire of the charging line from the external power grid flow through the bottom plate 21. Optionally, in order to further reduce the size of the circuit board, by adopting a multi-layer PCBA copper plating solution on the bottom plate, the Z-direction space is not occupied, and the AC power of the external power grid is sent to the power output interface of the charging gun for external charging.

[0049] The input end of the first voltage-current converter is connected to the charging line of the external power grid, and the output end is connected to at least one power-consuming element of the side panel. Optionally, the first voltage-current converter converts the 220VAC external power grid into 12VDC to supply power to the power-consuming element of the side panel 22. Figure 8 , the red line is the direction of current flow when the first voltage-to-current converter converts 220VAC to 12VDC.

[0050] The input end of the second voltage-current converter is connected to an output end of the first voltage-current converter, and the output end of the second voltage-current converter is connected to multiple electrical components on the side panel 22 and the interactive panel 23. Optionally, the second voltage-current converter converts 12VDC into 5VDC for the electrical components on the side panel 22 and the interactive panel 23. The main controller 221 uses 5VDC, and the interactive device 231 on the interactive panel that starts charging also needs to use 5VDC. The main controller 221 is electrically connected to multiple electrical components on the three-dimensional printed circuit board assembly 2. The main controller 221 receives signals sent by each electrical component, processes the signals, and sends instructions to the electrical components. Fig. 9 As shown, the red line is the direction of current flow when the second voltage-to-current converter converts 12VDC into 5VDC.

[0051] AC is the abbreviation of "Alternating Current", which means "alternating current", and refers to the current whose direction changes periodically with time, such as the common household electricity. DC is the abbreviation of "Direct Current", which means "direct current", and its current direction does not change with time, such as the electricity provided by the battery is usually direct current.

[0052] By arranging a two-stage DC-DC loop, the first stage is arranged at the 220VAC input end and converted into 12VDC, which can be optionally used as the driving voltage of the relay on the base plate 21; the second stage is arranged at the 12V output end and converted into 5VDC for use by various main controllers, sampling circuits, etc.

[0053] The interactive device 231 for starting charging is, for example, an IC card detection circuit, which starts the charging function of the charging gun by detecting the card swiping action of an external user. The interactive device 231 for starting charging is arranged inside the gun body. This embodiment is the first technical solution to put the interactive device 231 for starting charging inside the charging gun. Optionally, the gun body is an injection molded part.

[0054] This embodiment solves the technical problems in the existing 7kW power charging pile technology that the charging pile for charging electric vehicles occupies a large space and the production cost of the entire charging system is high. The integrated charging gun provided by the present invention occupies a small space, has a high degree of integration and a low production cost while maintaining the power unchanged.

[0055] In one embodiment, the side plate is connected to the bottom plate and the interactive plate by a pin header, and the side plate is connected to the bottom plate and the interactive plate by a pin header, thereby avoiding interference with the high-voltage electrical clearance and creepage distance of the high-voltage circuit.

[0056] In one embodiment, the interactive device for starting charging is a contact interactive device or a contactless interactive device. The user uses the interactive device for starting charging to start charging, for example, by swiping an IC card. At this time, the interactive device for starting charging is an IC card detection circuit, and the external card swiping action is detected by the IC card detection circuit. Both the contact interactive device and the contactless interactive device can realize the start function, for example, by using Bluetooth pairing for detection. When it is detected that the vehicle matches the Bluetooth of the charging gun, it can be started immediately after the gun is plugged in, without the need for swiping the card. At this time, the interactive device for starting charging is a Bluetooth detection module. By starting charging through the interactive device for starting charging, the charging pile can serve different users and facilitate operations such as billing.

[0057] In one embodiment, the contact interaction device is an IC card detection circuit. IC card is an "Integrated Ci rcuit Card", sometimes also called a "Smart Card". "Integrated Ci rcu itCard" emphasizes the technical feature that the integrated circuit is integrated in the card, while "Smart Card" focuses more on its intelligent functions and application characteristics. IC card can be used for fast operation: just bring the IC card close to or insert it into the card reader to complete identity recognition or payment operations, without the need for cumbersome signatures, password input and other processes as in traditional methods, which greatly saves time.

[0058] In order to detect whether an IC card has been swiped in from the outside, an IC card detection circuit is designed in the cavity of the charging gun to detect the IC card. Designing an IC card detection circuit in the cavity of the charging gun to detect the swiping action of a matching IC card is an unprecedented solution in the industry.

[0059] In one embodiment, the contactless interaction device is a Bluetooth detection module or a 5G automatic sensing chip module.

[0060] When in use, when the vehicle's Bluetooth is successfully paired with the charging gun's Bluetooth, the charging gun automatically turns on the charging function. When using the 5G automatic sensing chip module, when the positioning system locates that the distance between the vehicle and the charging pile is very close, for example, less than 1 meter, the charging function of the charging gun is turned on.

[0061] The Bluetooth detection module transmits the pairing signal to the main controller, and the main controller controls the charging. The 5G automatic sensing chip module transmits the sensing signal to the main controller, and the main controller controls the charging.

[0062] By using a Bluetooth detection module or a 5G automatic sensing chip module to enable the charging function of the charging gun, users can use the charging gun more conveniently and quickly, and achieve "vehicle approaching, automatic authentication".

[0063] In one embodiment, a residual current protection device 211 and a relay 212 are provided on the bottom plate 21, and the residual current protection device 211 and the relay 212 are sequentially connected between the power input interface and the power output interface on the bottom plate;

[0064] The residual current protection device 211 detects whether the charging line of the external power grid has leakage. If so, it reports to the main controller 221. The relay 212 is used to receive instructions from the main controller 221 and control the conduction between the power input interface and the power output interface on the bottom board according to the instructions. Figure 7 and 8 As shown, the red line is the direction of current flow.

[0065] The residual current protection device 211 detects whether there is leakage in the charging line of the external power grid (current fluctuations caused by the power quality of the external power grid cause leakage). If there is leakage, it will be reported to the main controller 221. The relay 212 is used to receive instructions from the main controller 221 and control the conduction between the power input interface and the power output interface on the bottom board according to the instructions. The main controller 221 controls the relay to disconnect according to the specific situation, thereby disconnecting the entire charging circuit to avoid losses to the charging gun, vehicle or operator.

[0066] Optionally, a threshold value is set for the leakage amount, and when the leakage amount exceeds the set threshold value, it is reported to the main controller 221 to disconnect the charging path.

[0067] Relay 212 is used to control the on and off of the charging circuit. When the user is charging, the charging gun has been inserted into the charging port of the vehicle, but if the interactive device for starting charging has not received an external start-up operation, such as a card swiping operation, the main controller 221 will not control the relay to close at this time. It will control the relay to close only when it detects that the interactive device for starting charging has received an external start-up operation. Even if the user inserts the gun head, it will not be powered on at this time, so as to charge safely. Optionally, the relay is controlled by delivering a driving current to the relay. Optionally, the relay can be a single relay or a double-contact magnetic holding relay.

[0068] In one embodiment, the relay 212 is a magnetic double-contact L / N relay.

[0069] In order to further reduce the circuit size, a single relay and / or a magnetically attracted double-contact L / N relay (also called a double-contact magnetically attracted holding relay) is used.

[0070] In one embodiment, the relay 212 is disposed on the bottom plate near the gun head.

[0071] Since the relay generates heat when it works, it is placed near the gun head ( Fig.11 The left side is the area close to the gun head), which is far away from the position where the user holds the charging gun, avoiding the user's discomfort of feeling heat when holding the charging gun.

[0072] In one embodiment, a main power current and voltage sampling module 213 is provided on the base plate at a position corresponding to the relay 212, for sampling the voltage and current of the power input port of the base plate.

[0073] Optionally, a main power current and voltage sampling module 213 (such as Fig. 9As shown in the figure, the voltage and current of the same flow can be monitored at the shortest distance and minimum size (small distance and small signal interference). By setting the main power current and voltage sampling module 213, the current and voltage flowing into the charging interface of the vehicle can be monitored to prevent the charging interface from being burned by large current. Fig. 9 The yellow line in the middle shows the flow direction of voltage and current. The main controller 221 obtains the voltage and current values ​​collected by the main power current and voltage sampling module 213, and makes decisions. For example, when the voltage is too large or the current is too large, the relay 212 is controlled to disconnect. Optionally, the current and voltage sampling module 213 integrates a temperature acquisition function, and determines whether the circuit is in a normal charging state at this time by the temperature value. Optionally, the main power current and voltage sampling module 213 is a voltage division sampling, and the two ends of the voltage division are the input and output ends of the relay 212 respectively. The main power current and voltage sampling module 213 can obtain the current voltage data with very low loss.

[0074] In one embodiment, a button 232 and an indicator light 233 are also installed on the interactive board, and the button 232, the interactive device 231 for starting charging and the indicator light 233 are arranged in sequence from the gun head 1 to the gun body 3. Fig.12 and 13 shown.

[0075] Button 232 is used in conjunction with the plug-in gun head. When button 232 is pressed, the main controller 221 receives the signal from the button and controls relay 212 to disconnect. The purpose of this design is: when it is detected that the user presses button 232, it means that the user is holding the charging gun for plugging and unplugging operations. At this time, 220V current is not allowed to pass, so as to prevent live plugging and unplugging and damage to the plug.

[0076] Optionally, a mechanical linkage rod linked to the button 232 is installed below the button 232. When the button 232 is pressed, the mechanical linkage rod linked to the button 232 is triggered, and the mechanical linkage rod is linked to the switch below to turn on the switch. At this time, the main controller 221 receives a signal that the switch is turned on, and the control relay 212 is disconnected.

[0077] Optionally, when the user activates the interactive device 231 for starting charging and presses the button 232 , the main controller 221 responds to the action of the button 232 first, and the control relay 212 is disconnected. The power is turned on only after the user releases the button 232 .

[0078] Optionally, the button 232 and the switch select the S3 button and the S3 switch. S3 is a normally closed switch and is in a closed state when not pressed. S3 is detection point 3, S is the first letter of the English word "Sense", and 3 represents the serial number. Sometimes it is also called "charging gun mechanical lock state detection switch" according to its function.

[0079] The indicator light 233 is a status indicator light, which displays the charging status, such as charging, full, etc. Optionally, the indicator light 233 is an LED light, which displays the charging status to the outside through the light-transmitting area outside the charging gun.

[0080] Optionally, the interactive device 231 for starting charging is an IC card. When the user swipes the card, he only needs to touch the card to the outside of the IC module above the charging gun to detect the card information.

[0081] The button 232, the interactive device 231 for starting charging and the indicator light 233 are arranged in sequence from the gun head 1 to the gun body 3. In order to prevent the user from interfering with each other when operating the interactive device 231 for starting charging, pressing the button 232 and checking the indicator light 233, the button 232, the interactive device 231 for starting charging and the indicator light 233 are arranged in sequence from the gun head 1 to the gun body 3 to facilitate user operation.

[0082] The above description is only the principle and preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this field, several other modifications can be made based on the principle of the present invention, which should also be considered as the protection scope of the present invention.

Claims

1. An integrated charging gun, characterized in that: include: A gun head, a three-dimensional printed circuit board assembly and a gun body, wherein the gun head is fixedly connected to the three-dimensional printed circuit board assembly, and the three-dimensional printed circuit board assembly is installed in the gun body and connected to the gun body through a containing structure; The three-dimensional printed circuit board assembly includes: a bottom plate, a side plate and an interactive plate, wherein two parallel sides of the side plate are respectively connected to the bottom plate and the interactive plate, a power input interface on the bottom plate is connected to a charging line of an external power grid, a power output interface is connected to a power input terminal of an external vehicle, and at least an interactive device for starting charging is installed on the interactive plate; A first voltage-current converter is arranged on the bottom plate, a second voltage-current converter and a main controller connected to a plurality of electrical components are arranged on the side plate, an input end of the first voltage-current converter is connected to a charging line of an external power grid, an output end is connected to at least one electrical component of the side plate, an input end of the second voltage-current converter is connected to an output end of the first voltage-current converter, and an output end of the second voltage-current converter is connected to a plurality of electrical components on the side plate and the interactive plate.

2. The integrated charging gun according to claim 1, characterized in that: The side plate is connected to the bottom plate and the interactive plate by using pin headers.

3. The integrated charging gun according to claim 1, characterized in that: The interactive device for starting charging is a contact interactive device or a contactless interactive device.

4. The integrated charging gun according to claim 3, characterized in that: The contact interaction device is an IC card detection circuit.

5. The integrated charging gun according to claim 3, characterized in that: The contactless interaction device is a Bluetooth detection module or a 5G automatic sensing chip module.

6. The integrated charging gun according to claim 1, characterized in that: The bottom plate is provided with a residual current protection device and a relay, which are sequentially connected between the power input interface and the power output interface on the bottom plate; The residual current protection device detects whether the charging line of the external power grid has leakage. If so, it reports to the main controller. The relay is used to receive instructions from the main controller and control the conduction between the power input interface and the power output interface on the baseboard according to the instructions.

7. The integrated charging gun according to claim 6, characterized in that: The relay is a magnetic double-contact L / N relay.

8. The integrated charging gun according to claim 6, characterized in that: The relay is arranged on the bottom plate at a position close to the gun head.

9. The integrated charging gun according to claim 6, characterized in that: A main power current and voltage sampling module is arranged at a position corresponding to the relay on the bottom plate, and is used to sample the voltage and current of the power input port of the bottom plate.

10. The integrated charging gun according to any one of claims 1 to 9, characterized in that: The interactive board is also equipped with buttons and indicator lights, and the buttons, the interactive device for starting charging and the indicator lights are arranged in sequence from the gun head to the gun body.

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