Charging and discharging integrated gun with control box

Abstract

The charging and discharging integrated gun with the control box comprises the control box, a gun body and a plug, the control box comprises a box body and a first circuit board arranged in the box body, the gun body comprises a gun shell and a second circuit board arranged in the gun shell, one end of the control box is connected with the gun body, and the other end of the control box is connected to the plug. The other end of the gun body is connected with a vehicle; the first circuit board is provided with a first MCU module, and a first MCU power supply module, a charging AC-DC module, a discharging AC-DC module, a contactor and a detection circuit which are connected with the first MCU module. The second circuit board is provided with a second MCU module, a second MCU power supply module connected with the second MCU module, and a CC module. The device further comprises a CP module which is arranged on the first circuit board and connected with the first MCU module, or the CP module is arranged on the second circuit board and connected with the second MCU module. The first circuit board is in communication connection with the second circuit board.

Description

Technical Field

[0001] The utility model relates to the technical field of charging and discharging of new energy vehicles, in particular to a charging and discharging integrated gun with a control box. Background Art

[0002] Existing electric vehicles have AC charging, V2L (vehicle-to-load) discharge, and vehicle-to-vehicle (V2V) discharge functions. A charging and discharging gun is connected to the electric vehicle to implement both vehicle-to-vehicle charging and vehicle-to-load discharge.

[0003] The patent application with publication number CN111525356A discloses a charging gun and charging device that are compatible with external discharge and vehicle charging functions, including a power supply plug, a control box, a socket and a charging plug. The power supply plug, control box, socket and charging plug are integrated into an integrated structure. This structure uses the power supply plug for discharge and the charging plug for charging, which is inconvenient to use. In addition, the control box is mainly used to control the on and off status of the main line and has fewer functions.

[0004] The patent with announcement number CN216139846U discloses a mode 2 charging and discharging charging gun, including a gun head, which is used to electrically connect to the charging interface of an electric vehicle; a mode 2 control box, including a charging switch, a charging interface, a discharge switch and a discharge interface. The gun head is electrically connected to the charging interface through the charging switch, and the charging switch is used to control the on and off of the line between the gun head and the charging interface. The gun head is electrically connected to the discharge interface through the discharge switch, and the discharge switch is used to control the on and off of the line between the gun head and the discharge interface. A charging gun with this structure only has a control circuit set in the control box, and the control circuit has few functions. Utility Model Content

[0005] The purpose of this utility model is to provide a charging and discharging gun with a control box, which integrates multiple functional circuits by installing circuit boards in the control box and the gun body. To achieve the above purpose, this utility model adopts the following technical solutions:

[0006] The utility model discloses a charging and discharging integrated gun with a control box, comprising a control box, a gun body and a plug. The control box comprises a box body and a first circuit board arranged in the box body; the gun body comprises a gun shell and a second circuit board arranged in the gun shell; one end of the control box is connected to the gun body, and the other end is connected to the plug; the other end of the gun body is used to be connected to a vehicle.

[0007] The first circuit board is provided with a first MCU module and a first MCU power supply module, a charging AC-DC module, a discharging AC-DC module, a contactor and a detection circuit connected thereto; the first MCU power supply module supplies power to the first MCU module, the contactor is used to control the on and off of the circuit, the charging AC-DC module is provided at the input end of the contactor, the discharging AC-DC module is provided at the output end of the contactor, and the detection circuit is used to detect the working status and / or fault status of the charging and discharging gun.

[0008] The second circuit board is provided with a second MCU module and a second MCU power supply module connected thereto, and a CC module. The second MCU power supply module supplies power to the second MCU module. The CC module is used to control the charging and discharging gun to enter a charging state or a discharging state.

[0009] The system further comprises a CP module, the CP module being arranged on a first circuit board and connected to a first MCU module, or the CP module being arranged on a second circuit board and connected to a second MCU module. The first circuit board is in communication connection with the second circuit board.

[0010] Furthermore, a tact switch is provided on the gun housing, and a tact switch identification module is provided on the second circuit board; the tact switch identification module is used to detect the electrical signal of the tact switch and transmit it to the second MCU module.

[0011] Preferably, the CC module includes a CC control module and a CC high-impedance controller, and the CP module includes a CP control module and a CP high-impedance controller; the vehicle end is provided with a CC port and a CP port; the CC control module includes a CC control switch, and the CC control switch enables the charging and discharging gun to enter the charging mode or the discharging mode.

[0012] The CC high-impedance controller is connected to the CC control module and is used to control the CC port to be in a high-impedance state relative to ground, thereby blocking the CC port from the CC control module, or connecting the CC port to the CC control module. The CP control module is used to connect or cut off the CP signal within the charging and discharging gun. The CP high-impedance controller is connected to the CP control module and is used to control the CP port to be in a high-impedance state relative to ground, thereby blocking the CP port from the CP control module, or connecting the CP port to the CP control module.

[0013] Among them, the CC high-impedance controller is an ordinary relay, the CP high-impedance controller is an ordinary relay or a solid-state relay, the CC high-impedance controller is a normally closed relay; and the CP high-impedance controller is a normally open relay.

[0014] Preferably, the CP control module includes: a CP signal circuit for generating a CP voltage and collecting and detecting CP voltage changes caused by changes in vehicle-end resistance; and a CP switch circuit, one end of which is connected to the CP signal circuit and the other end is connected to the MCU module.

[0015] Preferably, the second circuit board is further provided with one or more of the following connected to the second MCU module: a gun tip temperature control module, a Bluetooth module, and a cover opening module.

[0016] Furthermore, the detection circuit includes a vehicle-end short-circuit detection module, a vehicle-end CP diode detection circuit, a voltage and current detection module, a board temperature detection module, and a grounding detection module; the vehicle-end short-circuit detection module is used to detect whether the vehicle end is short-circuited before charging and discharging; the vehicle-end CP diode detection circuit is used to detect whether the vehicle-end CP diode is short-circuited; the voltage and current detection module is used to detect the voltage and current on the first circuit board; the board temperature detection module is used to detect the temperature of the first circuit board; and the grounding detection module is used to detect whether the power supply is grounded.

[0017] Preferably, a zero-crossing switch is also provided on the first circuit board; the zero-crossing switch includes an input voltage detection zero-crossing switch and an output voltage detection zero-crossing switch; the input voltage detection zero-crossing switch is arranged between the L end and the N end of the plug; the output voltage detection zero-crossing switch is arranged between the L end and the Nout end of the vehicle; the input voltage detection zero-crossing switch is connected to the first MCU module, and transmits the first voltage signal detected at the L end and the N end to the first MCU module; the output voltage detection zero-crossing switch is connected to the first MCU module, and transmits the second voltage signal detected at the Lout end and the Nout end to the first MCU module, and the first MCU module detects relay fault according to the second voltage signal.

[0018] Among them, the vehicle-end short-circuit detection module includes a relay group, which has two groups of switches, namely a first switch and a second switch. One end of the first switch is connected to the vehicle-end Lout, and the other end is connected to the low voltage Vdc2 end. One end of the second switch is connected to the vehicle-end Nout, and the other end is connected to the first MCU module. The voltage of the low voltage Vdc2 end is 1~30V.

[0019] In some embodiments, the relay group is a group of switching relays, or two groups of switching relays connected in series.

[0020] In other embodiments, the relay group is a group of normally open relays, or two groups of normally open relays connected in series.

[0021] In some embodiments, an identity recognition control module is further included, and the identity recognition control module includes a first identity recognition chip arranged in the plug, and the first MCU module is provided with a chip control pin electrically connected to the first identity recognition chip.

[0022] In other embodiments, a charge and discharge identification module is provided on the first circuit board, which is used to identify the charging mode and the discharging mode and transmit the signal to the first MCU module; the charge and discharge identification module includes a charge and discharge identification terminal having at least one group of pins, and the at least one group of pins is connected in series with the electronic components or circuits that can realize the change of physical properties and then connected to the MCU module; wherein the electronic components or circuits that can realize the change of physical properties are electronic components or circuits that can realize the change of resistance, voltage or current.

[0023] Preferably, an onboard lightning protection device and an onboard RCD device are also provided on the first circuit board. The onboard lightning protection device is provided at the input end of the contactor, and the onboard RCD device is provided at the output end of the contactor. The onboard RCD device is a type A, type A+6 or type B leakage module.

[0024] Due to the adoption of the above solution, the utility model has the following beneficial effects:

[0025] This method achieves multifunctional integration by installing a first circuit board in a control box and a second circuit board in a gun body, and the first circuit board is communicatively connected to the second circuit board, thereby distributing different functional module circuits on the first circuit board or the second circuit board to meet the standard requirements of a charging and discharging integrated gun and improve safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the charging and discharging integrated gun of the utility model.

[0027] Figure 2 This is the circuit framework diagram of this new model.

[0028] Figure 3 This is a schematic diagram of the first MCU module and the first MCU power supply module.

[0029] Figure 4 This is the circuit diagram of the CP control module.

[0030] Figure 5 This is the schematic diagram of the vehicle-side short-circuit detection module.

[0031] Figure 6 This is a circuit diagram of the vehicle-side short-circuit detection module of Example 1.

[0032] Figure 7 This is a circuit diagram of the vehicle-side short-circuit detection module of Example 2.

[0033] Figure 8 This is a circuit diagram of the vehicle-side short-circuit detection module of Example 3.

[0034] Figure 9 This is a circuit diagram of the vehicle-side short-circuit detection module of Example 4.

[0035] Figure 10 Circuit diagram of the zero-crossing switch for input voltage detection.

[0036] Figure 11 Circuit diagram of the zero-crossing switch for output voltage detection.

[0037] Description of main component symbols:

[0038] 1: control box, 11: box body, 12: first circuit board, 2: gun body, 21: second circuit board, 3: plug, 4: CP control module, 41: CP signal circuit, 42: CP switch circuit. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in further detail below with reference to the accompanying drawings and specific embodiments.

[0040] like Figure 1 As shown, the utility model discloses a charging and discharging gun with a control box, comprising a control box 1, a gun body 2 and a plug 3. One end of the gun body is used to connect to the car end, and the car end is provided with a CP port and a CC port. The other end of the gun body 2 is connected to the control box 1 through a cable 4, and the other end of the control box 1 is connected to the plug 3. When the charging gun is charging, the plug 3 can be plugged into the mains end to charge the car, or the plug 3 can be first connected to an adapter (such as a 16A to 10A converter), and the adapter is plugged into the mains end to charge the car. When the charging and discharging gun is discharging, the plug 3 is plugged into the discharge socket for discharge.

[0041] The control box 1 includes a box body 11 and a first circuit board 12 disposed within the box body 11. The gun body 2 includes a gun housing 21 and a second circuit board 22 disposed within the gun housing 21. The gun housing is provided with a touch switch 23. The following is a detailed description of the wiring of the first circuit board and the second circuit board.

[0042] 1. First circuit board

[0043] like Figure 2 As shown, the first circuit board is provided with a first MCU module and a first MCU power supply module connected thereto, a contactor, a charging AC-DC module, a discharging AC-DC module, a CP module, a detection circuit, an identification control module, an indicator light module, an onboard lightning protection device and an onboard RCD device.

[0044] 1.1 First MCU module, first MCU power supply module, contactor, charging AC-DC module and discharging AC-DC module

[0045] The first MCU power supply module supplies power to the first MCU module (U3). Figure 3 As shown, the first MCU module is a single-chip microcomputer with multiple control pins. Contactor 6 is a component used to automatically connect or disconnect the current circuit. The contact system of contactor 6 can be driven by an electromagnet, compressed air, or liquid pressure, or it can also be implemented using a thyristor. In this embodiment, contactor 6 is a relay, which includes two relays, L and N, for controlling the connection and disconnection between the plug and the gun body.

[0046] The charging AC-DC module is located at the input of the contactor, and the discharging AC-DC module is located at the output of the contactor. The charging AC-DC module and the discharging AC-DC module can be circuits according to document number CN115693855A to power the MCU module in different states. Alternatively, the charging AC-DC module and the discharging AC-DC module can be circuits according to document number CN115571014A to provide isolation protection during both charging and discharging, improving safety while providing power.

[0047] 1.2CP module

[0048] The CP module is disposed on the first circuit board and connected to the first MCU module. In other embodiments, the CP module may also be disposed on the second circuit board and connected to the second MCU module.

[0049] The CP module includes a CP control module 4 and a CP high-impedance controller. The CP high-impedance controller is a common relay or solid-state relay. The CP control module 4 is used to connect or cut off the CP signal in the charging and discharging gun. The CP high-impedance controller is connected to the CP control module to control:

[0050] (1) The CP port is in a high impedance state relative to the ground to block the CP port from the CP control module;

[0051] (2) Connect the CP port to the CP control module.

[0052] like Figure 4 As shown, the CP control module 4 includes: a CP signal circuit 41, which is used to generate a CP voltage and collect and detect CP voltage changes caused by changes in vehicle-end resistance. The CP signal circuit 41 can adopt the circuit structure disclosed in Publication No. CN214138295U, or the circuits disclosed in Publication No. CN115693855A, CN115378077A, Publication No. CN207321131U, etc.

[0053] The CP switch circuit 42 has one end connected to the CP signal circuit 41 and the other end connected to the first MCU module. In this embodiment, the CP switch circuit 42 includes a transistor Q1 and a MOS transistor Q2. The base of the transistor Q1 is connected to the linkage control pin U3-22 of the first MCU module. The first MCU module controls the on / off of the transistor Q1, and the transistor Q1 controls the on / off of the MOS transistor Q2. The MOS transistor Q2 is connected to the CP signal circuit. The transistor Q1 is an NPN transistor. The collector of the transistor Q1 is connected to the first voltage-dividing resistor R1 and to the VDC terminal, and the emitter is grounded. The MOS transistor Q2 is a P-channel MOS transistor. The S-pole of the MOS transistor is connected to the VDC terminal, the D-pole is connected to the CP signal circuit 41, and the G-pole is connected to the second voltage-dividing resistor R2 and then to the collector of the transistor Q1.

[0054] 1.3 Detection Circuit

[0055] The detection circuit on the first circuit board includes a vehicle-end short-circuit detection module, a vehicle-end CP diode detection circuit, a voltage and current detection module, a board temperature detection module, and a grounding detection module.

[0056] (1) Vehicle-side short-circuit detection module

[0057] The vehicle-side short-circuit detection module is used to detect whether the vehicle-side is short-circuited before charging or discharging. Figure 5 As shown, the vehicle-side short-circuit detection module comprises a relay group with two switches: a first switch and a second switch. The first switch, K1, connects one end to the vehicle-side Lout and the other to the low-voltage terminal, Vdc2. The second switch, K2, connects one end to the vehicle-side Nout and the other to the I / O port of the first MCU module and to ground. The voltage at the low-voltage terminal, Vdc2, ranges from 1 to 30V. The circuit works as follows: K1 and K2 are first closed, allowing the low-voltage Vdc2 to reach the vehicle-side Lout through a resistor. If a short circuit occurs on the vehicle side, the I / O port of the first MCU module detects a high level. If no short circuit occurs, the low-voltage Vdc2 fails to reach the vehicle-side Lout, resulting in a low level detected by the I / O port of the first MCU module. The voltage level detected by the I / O port of the first MCU module determines whether a vehicle-side short circuit exists.

[0058] The circuit of the specific embodiment of the vehicle-side short-circuit detection module can be Figures 6 to 9 The following describes the four circuits:

[0059] ①Example 1

[0060] like Figure 6As shown, the relay group of the vehicle-side short-circuit detection module is an 8-pin switching relay K3. The switching relay has 8 pins: Pin 1 is connected to the VDC terminal, Pin 8 is connected to the control pin U3-23 of the first MCU module and ground, and Pins 3 and 4 form a first switch (Pin 3 is connected in series with a protection diode D2 to the low voltage Vdc2 terminal, and Pin 4 is connected in series with a fuse FR1 and then to the vehicle-side Lout). Pins 6 and 5 form a second switch (Pin 6 is connected in series with a protection diode D3 to the control pin U3-24 of the first MCU module, and Pin 5 is connected to the vehicle-side Nout). Pins 3 and 6 can be switched to connect to Pins 2 and 7, or to Pins 4 and 5.

[0061] The transfer relay is bipolar and can seamlessly control two circuits at the same time, making wiring easy.

[0062] ②Example 2

[0063] like Figure 7 As shown, the relay group of the vehicle-side short-circuit detection module includes two sets of changeover relays K4 and K5, which are connected in series and each has 8 pins. Pin 1 of the changeover relays K4 and K5 is connected to the VDC terminal, and pin 8 is connected to pin U3-23 of the first MCU module and ground.

[0064] Pins 2 and 7 of the changeover relay K4 are normally closed contacts, pins 3 and 6 are common terminals, and pins 4 and 5 are normally open contacts. Pin 3 of the changeover relay K4 is connected to the Vdc2 terminal, pin 6 is connected to pin 4, and pin 5 is connected to the vehicle terminal Lout.

[0065] Pins 2 and 7 of the switching relay K5 are normally closed contacts, pins 3 and 6 are common terminals, and pins 4 and 5 are normally open contacts. Pin 3 of the switching relay K5 is connected to pin 5, pin 6 is connected to pin U3-35 of the first MCU module, and pin 4 is connected to the vehicle end Nout.

[0066] Compared with the first embodiment, this embodiment has an additional conversion relay connected in series, which can increase the voltage resistance.

[0067] ③Example 3

[0068] like Figure 8 As shown, the relay group of the vehicle-side short-circuit detection module is simplified to a normally open relay K6 with 6 pins compared to the first embodiment, and the rest of the wiring is similar to the first embodiment.

[0069] That is, pin 1 of the normally open relay K6 is connected to VDC, pin 2 is connected to control pin U3-23 of the first MCU module, and is also connected to ground. Pin 3 is connected to the low voltage Vdc2 terminal, pin 5 is connected in series with a fuse and then to the vehicle terminal Lout. Pin 4 is connected in series with a protection diode and then to control pin U3-24 of the first MCU module, and pin 6 is connected to the vehicle terminal Nout.

[0070] Compared with the circuit of embodiment 3, the circuit of embodiment 1 has an additional winding in the change-over relay compared to the normally open relay, which increases the relay air gap and the primary and secondary withstand voltage rating. However, the circuit structure of embodiment 3 is simpler and the cost is lower.

[0071] ④Example 4

[0072] like Figure 9 As shown, the relay group of the vehicle-side short-circuit detection module is simplified to the normally open relays K7 and K8 with 6 pins compared with the second embodiment, and the rest of the wiring method is similar to the second embodiment.

[0073] Pin 1 of the normally open relay K7 is connected to the VDC terminal, pin 2 is connected to the control pin U3-23 of the first MCU module and to ground. Pin 3 is connected to the Vdc2 terminal, pin 4 is connected to pin 5, and pin 6 is connected to the vehicle terminal Lout.

[0074] Pin 1 of the normally open relay K8 is connected to the VDC terminal, pin 2 is connected to the control pin U3-23 of the first MCU module and to ground. Pin 3 is connected to pin 6, pin 4 is connected to pin U3-24 of the first MCU module, and pin 5 is connected to the vehicle terminal Nout.

[0075] (2) Vehicle-side CP diode detection circuit

[0076] GB / T 18487.1-2023 specifies diode presence detection, requiring that before energy transfer, the power supply equipment must verify that the connected device is an electric vehicle, not a load, by detecting the presence of diode D1' in the control pilot circuit. This detection indicates the presence of diode D1' in the control pilot circuit and that the connected device is an electric vehicle or electric vehicle simulator. When the low-level state of the PWM signal is detected within the specified voltage range (when the plug and CP are properly connected, the negative half-cycle of the vehicle-side CP outputs a fixed voltage of -12±0.8V (Chinese standard) or -12±0.6V (European standard)), the device determines that diode D1' is present in the control pilot circuit and that the connected device is an electric vehicle or electric vehicle simulator. If the CP diode in the vehicle-side CP circuit shorts, the absolute value of the negative half-cycle voltage on the vehicle-side CP is pulled to the same level as the positive half-cycle voltage, preventing the voltage from reaching -12V. However, the CP signal can still be connected properly, resulting in a false charging process.

[0077] The vehicle-side CP diode detection circuit can adopt the circuit with document number: CN115571014A.

[0078] (3) Voltage and current detection module

[0079] The voltage and current detection module is used to detect the voltage and current on the first circuit board, and can adopt circuits with document numbers: CN115693855 A, CN113910959A, CN216209416U, etc.

[0080] (4) Board temperature detection module

[0081] The board temperature detection module is used to detect the temperature of the first circuit board.

[0082] (5) Ground detection module

[0083] The ground detection module is used to detect whether the power supply is grounded. For example, the circuits described in reference numbers CN213689887U and CN216783298U can be used.

[0084] 1.4 Zero-crossing switch

[0085] The zero-crossing switch and contactor fault detection circuit includes an input voltage detection zero-crossing switch and an output voltage detection zero-crossing switch. The input voltage detection zero-crossing switch is set between the L and N terminals of the plug; the output voltage detection zero-crossing switch is set between the Lout and Nout terminals of the vehicle.

[0086] like Figure 10 As shown, the input voltage detection zero-crossing switch is connected to the first MCU module, and the detected first voltage signals of the L terminal and the N terminal are transmitted to the first MCU module.

[0087] like Figure 11 As shown, the output voltage detection zero-crossing switch is connected to the first MCU module, and the second voltage signals detected at the Lout and Nout terminals are transmitted to the first MCU module, and the first MCU module detects relay faults based on the second voltage signals.

[0088] The input voltage detection zero-crossing switch includes step-down capacitors CX1 / CX2, multiple series resistors R3-R6 / R9-R12, filter capacitors C1-C2, voltage divider resistors R7, R8, R13, and R14, and diodes D4-D5 / D6-D7. Step-down capacitor CX1 is connected to the L input, and CX2 is connected to the N input, providing voltage reduction and current limiting. The series resistor, formed by multiple resistors connected in series, has one end connected to the step-down capacitor and the other to the filter capacitor, ensuring a safe distance (> 5mm) between the circuit and the relay. The voltage divider resistor is connected in parallel with the filter capacitor, with one end connected to the microcontroller's AD port (LinU3-30 / NinU3-29) and the other end connected to ground. Diodes D4-D5 / D6-D7 protect the microcontroller from reverse voltage surges.

[0089] The output voltage detection zero-crossing switch includes step-down capacitors CX3 / CX4, multiple series resistors R15-R18 / R21-R24, filter capacitors C3-C4, voltage divider resistors R19, R20, R225, and R26, and diodes D8-D9 / D10-D11. Step-down capacitor CX3 is connected to the Lout output terminal, and CX4 is connected to the Nout output terminal, providing voltage reduction and current limiting. The series resistors, formed by multiple resistors connected in series, have one end connected to the step-down capacitor and the other to the filter capacitor, ensuring a safe distance (>5mm) between the circuit and the relay. The voltage divider resistors are connected in parallel to the filter capacitors, with one end connected to the microcontroller's AD port (Lout U3-27 / Nout U3-28) and the other end connected to ground. Diodes D8-D11 protect the microcontroller from reverse voltage surges.

[0090] By installing voltage detection zero-crossing switches at both the input and output of the charging and discharging gun, zero-crossing monitoring can be implemented for both charging and discharging modes, enabling detection and identification of both. When charging is about to begin, the contactor is closed by monitoring the input voltage at a zero-crossing, reducing AC voltage spikes and protecting the vehicle battery and related modules behind the contactor, allowing zero-crossing voltage charging to the vehicle. When discharging is about to begin, the contactor is closed by monitoring the input voltage at a zero-crossing, reducing AC voltage spikes and protecting the power supply equipment required by the power strip, allowing zero-crossing voltage discharge to the load. The inclusion of zero-crossing switches in both modes improves the voltage safety of the respective output sources and corresponding AC-DC modules, reducing startup voltage stress.

[0091] like Figure 7As shown, the first MCU module at the output end is equipped with two AD ports, Lout U3-27 and Nout U3-28, to receive collected AD voltages, enabling contactor fault detection. Contactor faults include tripping and sticking. Tripping means the contactor switch is always in the open state, while sticking means the contactor switch is always in the closed state. Both are significantly different from the voltage at the test point Vs during normal contactor operation. The circuit of this utility model uses RC voltage reduction to perform separate AD sampling at the L output terminal (Lout) and the N output terminal (Nout). Different combinations of AD samples are generated when the relay is sticking, tripping, or operating normally, and are provided to the microcontroller. The microcontroller determines the current state of the relay. This allows the charging gun or charging station to individually detect whether the live wire contactor is stuck, causing a fault, regardless of whether the LN input is connected in the forward or reverse direction. When the contactor is closed, the circuit detects whether the individual contactor is tripped. If a fault occurs, a fault alarm is issued, thus protecting electronic products and personal safety.

[0092] 1.5 Identifying the Control Module

[0093] The recognition control module can be of two types: a charge and discharge recognition module or an identity recognition control module.

[0094] (1) Charge and discharge identification module

[0095] A charge and discharge identification module, configured to identify a charge mode and a discharge mode, and transmit the signal to the first MCU module;

[0096] The charge and discharge identification module includes a charge and discharge identification terminal having at least one set of pins, and the at least one set of pins is connected in series with an electronic component or circuit that can achieve a change in physical properties and then connected to the MCU module; wherein the electronic component or circuit that can achieve a change in physical properties is an electronic component or circuit that can achieve a change in resistance, voltage or current.

[0097] Specifically, the charge and discharge identification module may be provided with a circuit structure as disclosed in publication number CN115693855A.

[0098] (2) Identity recognition control module

[0099] The identification control module includes a first identification chip. The first MCU module is provided with a chip control pin electrically connected to the first identification chip. The first identification chip is disposed in the plug and pre-stores at least first identification information. The first identification information includes bidirectional authentication information for the vehicle and / or docking accessory that is compatible with the charging and discharging gun.

[0100] When the gun head body of the charging and discharging integrated gun is connected to the vehicle, and the plug is connected to the AC end to enter the charging mode or connected to the discharge end to enter the discharge mode, the first MCU module reads the identity identification information on the first identity identification chip to determine whether the first identity identification information matches. If it matches, charging starts in the charging mode and enters the discharge waiting mode in the discharge mode; if it does not match, charging or discharging is not performed.

[0101] The docking accessories include a conversion head and a discharge power strip that are compatible with the plug. The first identity recognition chip also pre-stores charging parameter information; the plug is connected to the mains terminal through the conversion head, and a second identity recognition chip is provided in the conversion head. The second identity recognition chip stores second identity recognition information that is bidirectionally authenticated with the first identity recognition information. When the conversion head is connected to the plug terminal, the second identity recognition chip is electrically connected to the first identity recognition chip, the first MCU module reads the second identity recognition information, and compares it with the first identity recognition information. If they match, the first MCU module reads the charging parameter information of the first identity recognition chip and starts charging.

[0102] During discharge, the plug is connected to a discharge power strip, which contains a third identity chip. The third identity chip stores third identity information that is mutually authenticated with the first identity information. When the discharge power strip is connected to the plug, the third identity chip is electrically connected to the first identity chip. The first MCU module reads the third identity information and compares it with the first identity information. If a match is found, discharge begins; otherwise, discharge does not occur.

[0103] The first, second, and third identification chips can be temperature sensor chips with identification functions, such as the MY18E20, MY1820, MY18B20Z, and MY18B20L series. These temperature sensor chips, based on the characteristic relationship between PN junction temperature and bandgap voltage in CMOS semiconductors, undergo small-signal amplification, analog-to-digital conversion, digital calibration, and output on a digital bus. They offer high accuracy, good consistency, and flexible programmability. Using a temperature sensor chip with identification functions allows for not only identification but also simultaneous monitoring of plug temperature.

[0104] 1.6 Indicator module, onboard lightning protection device and onboard RCD device

[0105] The first circuit board is also equipped with an indicator light module, an onboard lightning protection device, and an onboard RCD device. The onboard lightning protection device is installed at the input of the contactor, and the onboard RCD device is installed at the output of the contactor. The onboard RCD device is a Type A, Type A+6, or Type B residual current device. Type A+6 or Type B residual current devices are preferred to detect residual currents in sinusoidal AC, pulsating DC, and smooth DC of 6mA or above.

[0106] Second circuit board

[0107] The second circuit board is provided with a second MCU module and a second MCU power supply module, a touch switch identification module, a CC module, a Bluetooth module, a wireless module, and a cover opening module connected thereto.

[0108] The second MCU power supply module supplies power to the second MCU module, which is also a single chip microcomputer with multiple control pins.

[0109] The second circuit board is communicatively connected to the first circuit board, and the communication connection method can be: IIC, serial port, SPI connection, etc.

[0110] 2.1 Touch switch identification module

[0111] The touch switch identification module is used to detect the electrical signal of the touch switch and transmit it to the second MCU module. The touch switch identification module can adopt a circuit such as the one with the announcement number CNCN221660568U.

[0112] Function control can be achieved by touching the switch 3: its logic control principle can be set as needed, such as:

[0113] ①. Press the touch switch once, the touch switch recognition module converts it into a first electrical signal and sends it to the second MCU module. The second MCU module 4 controls the opening of the charging port of the car.

[0114] For example, the second MCU module is provided with a Bluetooth cover opening module or a wireless cover opening module (such as a Tesla cover opening module). After receiving the first electrical signal, the second MCU module sends a charging cover opening signal with a specific radio frequency power to the car to control the car to open the charging cover.

[0115] ②. Press the touch switch twice. The touch switch recognition module converts it into a second electrical signal and sends it to the second MCU module. The second MCU module 4 controls the charging gear to switch from 10A to 13A.

[0116] ③ Long press the touch switch, the touch switch identification module converts it into a third electrical signal and sends it to the second MCU module, and the second MCU module controls emergency charging, etc.

[0117] 2.2CC module

[0118] The CC module is used to control the charging and discharging of the charging gun. The CC module includes a CC control module and a CC high-impedance controller. The car end is equipped with a CC port.

[0119] The CC control module includes a CC control switch, which enables the charging and discharging gun to enter charging mode or discharging mode. The CC high-impedance controller is connected to the CC control module to control:

[0120] ① The CC port is in a high-impedance state relative to the ground to block the CC port from the CC control module;

[0121] ②Connect the CC port to the CC control module.

[0122] The CC high-impedance controller is an ordinary relay or a normally closed relay.

[0123] 2.3 Gun Tip Temperature Control Module

[0124] The gun tip temperature control module is set inside the gun tip to ensure that the temperature of the gun tip is within the normal range. Once the gun tip temperature is found to be too high, charging or discharging will be stopped in time to prevent circuit damage.

[0125] In summary, this embodiment, by installing circuit boards in the control box and the gun body, not only meets the basic charging and discharging functions of the charging and discharging gun, but also integrates multiple functional circuits to achieve the following functions:

[0126] 1. Voltage and current detection, control, leakage detection and protection (voltage detection module, onboard RCD device).

[0127] 2. CP high-impedance state controls CP generation and CP detection (CP module)

[0128] 3. Accurate charge and discharge identification, or plug temperature detection and identity recognition (identification control module)

[0129] 4. Vehicle-end diode detection (vehicle-end CP diode detection circuit)

[0130] 5. Zero-crossing detection in charge and discharge mode, and fault detection of charge and discharge contactor (zero-crossing switch)

[0131] 6. Ungrounded detection (grounding detection module)

[0132] 7. Charging mode output short circuit detection (vehicle-side short circuit detection module)

[0133] 8. Temperature detection (board temperature detection module, gun head temperature control module)

[0134] 9. Touch switch, transmit radio frequency or switch gear or other reserved functions (touch switch identification module)

[0135] 10. Bluetooth control OTA or cover opening (Bluetooth module, cover opening module)

[0136] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.

Claims

1. A charging and discharging gun with a control box, characterized by: The gun comprises a control box, a gun body and a plug. The control box comprises a box body and a first circuit board disposed within the box body. The gun body comprises a gun housing and a second circuit board disposed within the gun housing. One end of the control box is connected to the gun body, and the other end is connected to the plug. The other end of the gun body is used to connect to a vehicle. The first circuit board is provided with a first MCU module and a first MCU power supply module, a charging AC-DC module, a discharging AC-DC module, a contactor and a detection circuit connected thereto; the first MCU power supply module supplies power to the first MCU module, the contactor is used to control the on and off of the circuit, the charging AC-DC module is provided at the input end of the contactor, the discharging AC-DC module is provided at the output end of the contactor, and the detection circuit is used to detect the working state and / or fault state of the charging and discharging gun; The second circuit board is provided with a second MCU module and a second MCU power supply module connected thereto, and a CC module. The second MCU power supply module supplies power to the second MCU module. The CC module is used to control the charging and discharging gun to enter a charging state or a discharging state. Also included is a CP module, the CP module is arranged on the first circuit board and connected to the first MCU module, or the CP module is arranged on the second circuit board and connected to the second MCU module; The first circuit board is communicatively connected to the second circuit board.

2. The charging and discharging gun with a control box according to claim 1, characterized in that: The gun housing is provided with a tact switch, and the second circuit board is provided with a tact switch identification module; the tact switch identification module is used to detect the electrical signal of the tact switch and transmit it to the second MCU module.

3. The charging and discharging gun with a control box according to claim 1, characterized in that: The CC module includes a CC control module and a CC high-impedance controller, and the CP module includes a CP control module and a CP high-impedance controller; the vehicle end is provided with a CC port and a CP port; The CC control module includes a CC control switch, which enables the charging and discharging gun to enter the charging mode or the discharging mode; The CC high-impedance controller is connected to the CC control module and is used to control the CC port to be in a high-impedance state relative to the ground, so as to block the CC port from the CC control module; or to connect the CC port to the CC control module; The CP control module is used to connect or cut off the CP signal in the charging and discharging gun; The CP high-impedance controller is connected to the CP control module and is used to control the CP port to be in a high-impedance state relative to the ground, so as to block the CP port from the CP control module; or to connect the CP port to the CP control module.

4. The charging and discharging integrated gun with a control box according to claim 3, characterized in that: The CC high-impedance controller is an ordinary relay, the CP high-impedance controller is an ordinary relay or a solid-state relay, the CC high-impedance controller is a normally closed relay; and the CP high-impedance controller is a normally open relay.

5. The charging and discharging gun with a control box according to claim 3, characterized in that: The CP control module includes: a CP signal circuit for generating a CP voltage and collecting and detecting CP voltage changes caused by changes in vehicle-end resistance; a CP switch circuit, one end of which is connected to the CP signal circuit and the other end is connected to the MCU module.

6. The charging and discharging integrated gun with a control box according to claim 1, characterized in that: The second circuit board is also provided with one or more of the following modules connected to the second MCU module: a gun tip temperature control module, a Bluetooth module, and a cover opening module.

7. The charging and discharging integrated gun with a control box according to claim 1, characterized in that: The detection circuit includes a vehicle-end short-circuit detection module, a vehicle-end CP diode detection circuit, a voltage and current detection module, a board temperature detection module, and a ground detection module; the vehicle-end short-circuit detection module is used to detect whether the vehicle end is short-circuited before charging and discharging; The vehicle-end CP diode detection circuit is used to detect whether the vehicle-end CP diode is short-circuited; The voltage and current detection module is used to detect the voltage and current on the first circuit board; The board temperature detection module is used to detect the temperature of the first circuit board; The grounding detection module is used to detect whether the power supply is grounded.

8. The charging and discharging gun with a control box according to claim 1, characterized in that: The first circuit board is also provided with a zero-crossing switch; The zero-crossing switch includes an input voltage detection zero-crossing switch and an output voltage detection zero-crossing switch; the input voltage detection zero-crossing switch is arranged between the L terminal and the N terminal of the plug; the output voltage detection zero-crossing switch is arranged between the Lout terminal and the Nout terminal of the vehicle; The input voltage detection zero-crossing switch is connected to the first MCU module to transmit the detected first voltage signals of the L terminal and the N terminal to the first MCU module; The output voltage detection zero-crossing switch is connected to the first MCU module, and transmits the detected second voltage signals of the Lout terminal and the Nout terminal to the first MCU module. The first MCU module detects relay faults based on the second voltage signals.

9. The charging and discharging integrated gun with a control box according to claim 7, characterized in that: The vehicle-end short-circuit detection module includes a relay group, which has two groups of switches, namely a first switch and a second switch. One end of the first switch is connected to the vehicle-end Lout, and the other end is connected to the low voltage Vdc2 end. One end of the second switch is connected to the vehicle-end Nout, and the other end is connected to the first MCU module. The voltage of the low voltage Vdc2 end is 1~30V.

10. The charging and discharging integrated gun with a control box according to claim 9, characterized in that: The relay group is a group of switching type relays, or two groups of switching type relays connected in series.

11. The charging and discharging integrated gun with a control box according to claim 9, characterized in that: The relay group is a group of normally open relays, or two groups of normally open relays connected in series.

12. The charging and discharging gun with a control box according to claim 1, characterized in that: It also includes an identity recognition control module, which includes a first identity recognition chip arranged in the plug, and the first MCU module is provided with a chip control pin electrically connected to the first identity recognition chip.

13. The charging and discharging gun with a control box according to claim 1, characterized in that: The first circuit board is also provided with a charge and discharge identification module, which is used to identify the charging mode and the discharging mode and transmit the signal to the first MCU module; The charge and discharge identification module includes a charge and discharge identification terminal having at least one set of pins, and the at least one set of pins is connected in series with an electronic component or circuit that can achieve a change in physical properties and then connected to the MCU module; wherein the electronic component or circuit that can achieve a change in physical properties is an electronic component or circuit that can achieve a change in resistance, voltage or current.

14. The charging and discharging gun with a control box according to claim 1, characterized in that: An onboard lightning protection device and an onboard RCD device are also provided on the first circuit board. The onboard lightning protection device is provided at the input end of the contactor, and the onboard RCD device is provided at the output end of the contactor. The onboard RCD device is a type A, type A+6 or type B leakage module.

Images