Charging and discharging gun and charging and discharging assembly

Abstract

The utility model discloses a charge and discharge gun and charge and discharge assembly, including: a control box including a housing and a control circuit board installed in the housing, the control circuit board is provided with a mode control module and a resistance adjusting module, the housing is provided with a mode control member and a resistance adjusting member, and the mode control member and the resistance adjusting member are connected with the control circuit board; the mode control part is connected with the mode control module, the mode control module can be triggered through the mode control part to switch a charging mode and a discharging mode, the resistance adjusting part is connected with the resistance adjusting module, and the resistance adjusting module can be triggered through the resistance adjusting part to adjust charging and discharging resistance values; the gun head is connected with the control box through a first wire; and the first plug-in connector is connected with the control box through a second lead. The charging and discharging gun of the scheme integrates charging and discharging functions, and solves the problem that the resistance is not matched when the electric vehicle discharges.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of charging equipment, in particular to a charging and discharging gun and a charging and discharging assembly. BACKGROUND

[0002] With the popularization of new energy electric vehicles, more and more people will charge electric vehicles by connecting household power supply through charging guns; at the same time, if the large-capacity batteries of electric vehicles can be used as mobile power banks for external discharging, it will be a great supplement to the functions of electric vehicles. At present, the charging and discharging gun of the vehicle has some problems, such as different external discharging resistances of different electric vehicles, which leads to that a discharging gun can only be used for an electric vehicle with the same resistance, and the universality is poor. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the embodiment of the utility model is to provide a charging and discharging gun and a charging and discharging assembly, which can solve the above problems existing in the prior art.

[0004] In order to achieve the above purpose, the following technical scheme is adopted in the present application:

[0005] On the one hand, a charging and discharging gun is provided, comprising:

[0006] A control box comprising a shell and a control circuit board installed in the shell, the control circuit board is provided with a mode control module and a resistance adjustment module, the shell is provided with a mode control member and a resistance adjustment member, the mode control member is connected with the mode control module, the mode control member can trigger the mode control module to switch the charging mode and the discharging mode, the resistance adjustment member is connected with the resistance adjustment module, and the resistance adjustment member can trigger the resistance adjustment module to adjust the charging and discharging resistance value through the resistance adjustment member;

[0007] A gun head connected with the control box through a first lead wire;

[0008] A first pair of plug connectors connected with the control box through a second lead wire.

[0009] Optionally, the resistance adjustment module comprises a potentiometer, the gun head is provided with a PE pin and a CC pin, the PE pin and the CC pin are connected with the potentiometer through sub-wires in the first lead wire, and the resistance value between the PE pin and the CC pin is adjusted through the potentiometer.

[0010] Optionally, the potentiometer comprises a rotary adjusting handle, the resistance adjustment member is a rotary knob structure, the resistance adjustment member is connected with the rotary adjusting handle, and the resistance of the potentiometer is adjusted by rotating the resistance adjustment member.

[0011] Optionally, a display screen is further installed on the shell, and the display screen is electrically connected with the control circuit board, and working parameters can be displayed through the display screen.

[0012] Optionally, the shell comprises a box base and a box cover, the box cover is provided with a first hole site, a second hole site and a perspective window, the mode control member is installed on the box cover in alignment with the first hole site, the resistance adjusting member is installed on the box cover in alignment with the second hole site, the display screen is installed on the inner side of the box cover in alignment with the perspective window, and the box base is provided with a sealing ring on the surrounding wall, the box cover is closed on the box base and closely attached to the sealing ring.

[0013] Optionally, the control circuit board is provided with a power module and a rectifier bridge stack, the control circuit board is further provided with a first relay in a fire line and a second relay in a zero line, the power module is connected in parallel with the rectifier bridge stack, the front and back ends of the first relay are connected with the rectifier bridge stack respectively, and the front and back ends of the second relay are connected with the rectifier bridge stack respectively.

[0014] Optionally, the control circuit board is provided with a relay module, and the input end and the output end of the relay module are respectively provided with a current sampling magnetic ring.

[0015] Optionally, the control circuit board is provided with a temperature sensor.

[0016] In another aspect, a charging and discharging assembly is provided, comprising:

[0017] The charging and discharging gun described above;

[0018] A conversion device comprises a second pair of plug connectors and a working head, the second pair of plug connectors is electrically connected with the working head through a third wire, and the second pair of plug connectors is adapted to be connected with the first pair of plug connectors of the charging and discharging gun.

[0019] Optionally, the working head is a plug, a wire, a power strip or a car charging gun head.

[0020] The application has the beneficial effects that the charging and discharging gun is integrated with the charging and discharging functions, and solves the problem of unmatched resistance when the electric vehicle is discharged. The user selects the charging mode or the discharging mode through the mode control piece on the control box. In the discharging mode, different electric vehicles may require different charging and discharging resistances, and the user sets the required charging and discharging resistance value through the resistance adjusting piece. The resistance adjusting piece triggers the resistance adjusting module on the control circuit board, and the module adjusts the resistance value of the discharging loop through the internal circuit to match the discharging demand of the electric vehicle. In summary, the resistance adjusting module can adapt to the charging and discharging resistance demand of different electric vehicles, and there is no need to design a discharging gun for each electric vehicle. The charging and discharging gun not only supports charging the electric vehicle, but also supports discharging the electric vehicle to external equipment or the power grid, realizing the function of the electric vehicle as a mobile power bank. The user can switch the charging and discharging mode and adjust the charging and discharging resistance through the simple mode control piece and the resistance adjusting piece, and the operation is simple and intuitive. The first pair of plug connectors can be connected to different conversion devices, realizing flexible selection according to different application scenarios and demands, and enhancing the practicability and flexibility of the charging and discharging gun. BRIEF DESCRIPTION OF DRAWINGS

[0021] The application will be further described in detail below according to the drawings and embodiments.

[0022] Figure 1 The structure schematic view of the charging and discharging gun described in the embodiments of the application is shown in the figure.

[0023] Figure 2 The explosion schematic view of the control box described in the embodiments of the application is shown in the figure.

[0024] Figure 3 The structure schematic view of the charging assembly described in the embodiments of the application is shown in the figure.

[0025] Figure 4 The connection circuit schematic view of the resistance adjusting module described in the embodiments of the application is shown in the figure.

[0026] Figure 5 The connection circuit schematic view of the power module described in the embodiments of the application is shown in the figure.

[0027] In the figure:

[0028] 10, charge-discharge gun; 11, control box; 111, shell; 1111, box base; 1112, box upper cover; 11121, perspective window; 1113, sealing ring; 112, control circuit board; 1121, first relay; 1122, second relay; 1123, power module; 1124, rectifier bridge stack; 1125, live wire; 1126, zero line; 1127, potentiometer; 113, mode control piece; 114, resistance adjusting piece; 115, display screen; 12, gun head; 13, first mating connector; 14, first wire; 15, second wire; 20, conversion device; 21, second mating connector; 22, third wire; 23, working head; 231, plug; 232, wire whip; 233, extension cord; 234, car charger gun head. DETAILED DESCRIPTION

[0029] In order to make the technical problems solved in the present application, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present application are further described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0032] With the popularity of new energy electric vehicles, more and more people will charge electric vehicles by connecting household power supply through charging guns; meanwhile, if the large-capacity batteries of electric vehicles can be used as mobile power banks to conveniently discharge externally, it will be a great supplement to the functions of electric vehicles. At present, the charging and discharging gun of the vehicle has some problems, such as different electric vehicles may use different resistances for external discharge, which leads to that a discharge gun can only be used for an electric vehicle with the same resistance, and the universality is poor.

[0033] In order to overcome the above technical problems, the embodiment provides a charging and discharging gun 10, comprising:

[0034] A control box 11 comprising a shell 111 and a control circuit board 112 installed in the shell 111, the control circuit board 112 is provided with a mode control module and a resistance adjustment module, the shell 111 is provided with a mode control piece 113 and a resistance adjustment piece 114, the mode control piece 113 is connected with the mode control module, the mode control piece 113 can trigger the mode control module to switch the charging mode and the discharging mode, the resistance adjustment piece 114 is connected with the resistance adjustment module, the resistance adjustment piece 114 can trigger the resistance adjustment module to adjust the charging and discharging resistance value;

[0035] A gun head 12 connected with the control box 11 through a first wire 14;

[0036] A first plug connector 13 connected with the control box 11 through a second wire 15.

[0037] In the charging and discharging gun 10 of the embodiment, the gun head 12 can be plugged into the charging and discharging connector of the vehicle, and the control circuit board 112 in the control box 11 can be used to control the charging and discharging process. In application, referring to Figure 3 , the first plug connector 13 can be connected with other conversion devices 20 to realize the charging or discharging function, specifically, the conversion device 20 comprises a second plug connector 21 and a working head 23, the second plug connector 21 can be docked with the first plug connector 13, and different working heads 23 can realize different functions, when the charging mode is selected, the gun head 12 of the charging and discharging gun 10 is plugged into the charging port of the electric vehicle, the first plug connector 13 is connected to the second plug connector 21 of the conversion device 20, and the working head 23 of the conversion device 20 is a plug 231, the plug 231 is connected to the mains power supply; when the discharging mode is selected and the charging and discharging resistance is adjusted, the gun head 12 of the charging and discharging gun 10 is still plugged into the charging port of the electric vehicle, at this time, the working head 23 of the conversion device 20 can be a wire throwing 232, a power strip 233 or a vehicle charging gun head 234, the wire throwing 232 can be connected to the house circuit switch to supply power to the power-off house; the power strip 233 can supply power to various electric appliances; and the vehicle charging gun head 234 can be plugged into another vehicle to charge the other vehicle.

[0038] Based on the charging and discharging gun 10 of the embodiment, the charging and discharging functions are integrated, and the problem of unmatched resistance when the electric vehicle is discharged is solved. The user selects the charging mode or the discharging mode through the mode control piece 113 on the control box 11. In the discharging mode, different electric vehicles may require different charging and discharging resistances, and the user sets the required charging and discharging resistance value through the resistance adjusting piece 114. The resistance adjusting piece 114 triggers the resistance adjusting module on the control circuit board 112, which adjusts the resistance value of the discharging loop through the internal circuit to match the discharging requirements of the electric vehicle. In summary, through the resistance adjusting module, the charging and discharging gun 10 can adapt to the charging and discharging resistance requirements of different electric vehicles, and there is no need to design a discharging gun for each electric vehicle. The charging and discharging gun 10 not only supports charging electric vehicles, but also supports discharging electric vehicles to external devices or power grids, realizing the function of electric vehicles as mobile power banks. The user can switch the charging and discharging modes and adjust the charging and discharging resistances through the simple mode control piece 113 and the resistance adjusting piece 114, which is simple and intuitive. The first pair of plug connectors 13 can be connected to different conversion devices 20, realizing flexible selection according to different application scenarios and requirements, and enhancing the practicality and flexibility of the charging and discharging gun 10.

[0039] In an embodiment, referring to Figure 4 , the resistance adjusting module includes a potentiometer 1127, and the gun head 12 is provided with a PE pin and a CC pin. The PE pin and the CC pin are connected to the potentiometer 1127 through sub-wires in the first wire 14, and the resistance value between the PE pin and the CC pin is adjusted through the potentiometer 1127.

[0040] The PE pin (Protective Earth) represents the ground wire. Through the PE pin, the charging and discharging gun 10 can be connected to the grounding system of the electric vehicle, thereby ensuring the electrical safety of the entire charging and discharging loop. The CC pin (Charging Connection Confirmation) represents the charging and discharging connection confirmation. Specifically, the vehicle control device judges whether the vehicle plug 231 is fully connected to the vehicle socket through the resistance between the CC pin and the PE pin. If the connection is normal, the charging pile will receive the corresponding signal, thereby starting the charging and discharging process. This connection confirmation mechanism helps to ensure the stability and reliability of the charging process, avoiding charging failure or safety hazards due to poor connection.

[0041] The potentiometer 1127 is a kind of adjustable electronic component, which changes its resistance value in the circuit by rotating or sliding the contact. In the design of the charging and discharging gun 10, the potentiometer 1127 is ingeniously integrated into the resistance adjustment module, which is used to adjust the resistance value between the PE pin and the CC pin. By adjusting the resistance value between the PE pin and the CC pin through the potentiometer 1127, the charging and discharging gun 10 can adapt to the different needs of different electric vehicles for charging and discharging resistance, which means that the same charging and discharging gun 10 can be used for multiple electric vehicles without the need to design a separate discharging gun for each vehicle model.

[0042] In an embodiment, the potentiometer 1127 includes a rotating adjustment handle, and the resistance adjustment piece 114 is a knob structure. The resistance adjustment piece 114 is connected to the rotating adjustment handle, and the resistance of the potentiometer 1127 is adjusted by rotating the resistance adjustment piece 114.

[0043] In this embodiment, the resistance adjustment piece 114 is designed as a knob structure, and the user can directly adjust the resistance value of the potentiometer 1127 by rotating the knob. This operation method is intuitive and easy to understand. Moreover, the knob adjustment has a large adjustable range and has the advantage of wider adaptability.

[0044] In an embodiment, the mode control piece 113 is a button structure.

[0045] In an embodiment, the housing 111 is also provided with a display screen 115, which is electrically connected to the control circuit board 112. The working parameters can be displayed through the display screen 115.

[0046] The display screen 115, as an information output device, can display various working parameters such as charging / discharging current, voltage, remaining capacity, resistance value, etc. These parameters are very important to the user, as they can help the user understand the working status of the charging and discharging gun 10 and the charging / discharging progress of the electric vehicle.

[0047] Through the working parameters displayed on the display screen 115, the user can timely discover abnormal conditions (such as overcurrent, overvoltage, etc.) in the charging and discharging process, which enables the user to take prompt measures to avoid potential safety hazards. In addition, the display screen 115 can also display some performance-related parameters such as battery temperature and internal resistance, which are very important to the user, as they can help the user better understand the status of the electric vehicle battery, thereby optimizing the charging / discharging strategy. The information on the display screen 115 can also be used for troubleshooting and maintenance. When the charging and discharging gun 10 fails, the maintenance personnel can quickly locate the problem through the information on the display screen 115 and take appropriate maintenance measures.

[0048] In an embodiment, the housing 111 comprises a box base 1111 and a box cover 1112, the box cover 1112 is provided with a first hole site, a second hole site and a perspective window 11121, the mode control 113 is mounted on the box cover 1112 in alignment with the first hole site, the resistance adjustment 114 is mounted on the box cover 1112 in alignment with the second hole site, and the display screen 115 is mounted inside the box cover 1112 and in alignment with the perspective window 11121, and the box base 1111 is provided with a sealing ring 1113 on the surrounding wall, and the box cover 1112 is covered on the box base 1111 and tightly abuts against the sealing ring 1113.

[0049] The box base 1111 is the main part of the housing 111, which carries the internal components such as the control circuit board 112 and the potentiometer, and the box cover 1112 covers the box base 1111 and is fixedly connected with the box base 1111 by some means such as screws or buckles.

[0050] The box cover 1112 is provided with a first hole site and a second hole site for mounting the mode control 113 and the resistance adjustment 114 respectively, and the design of these two hole sites allows the user to directly operate these components on the box cover 1112 without opening the entire housing 111.

[0051] In addition, the box cover 1112 is also provided with a perspective window 11121 for displaying the information on the display screen 115, and the display screen 115 is mounted inside the box cover 1112 and displays the information by aligning with the perspective window 11121. The perspective window 11121 is made of transparent material and can clearly display the content on the display screen 115.

[0052] The box base 1111 is provided with a sealing ring 1113 on the surrounding wall for providing additional sealing effect when the box cover 1112 is covered. The sealing ring 1113 is usually made of elastic material and can tightly fit the gap between the box cover 1112 and the box base 1111 to prevent external substances such as water and dust from entering the inside of the housing 111.

[0053] In an embodiment, the control circuit board 112 is provided with a timer module, and the duration of charging or discharging can be calculated through the timer module.

[0054] The timer module is a key component on the control circuit board 112, which is responsible for recording the duration of charging or discharging. Through cooperation with the charging / discharging circuit, the timer module can accurately calculate the time from the start to the end of charging / discharging.

[0055] Preferably, the display screen 115 is a touch screen, and the user can set the charging or discharging time through the display screen 115 to realize the function of automatic power-off at a set time. The function of automatic power-off at a set time can prevent the problems of battery overheating, overcharging or over-discharging caused by long-time charging / discharging, which not only can damage the battery, but also can cause fire hazards and other safety hazards. Therefore, the function of automatic power-off at a set time greatly improves the safety of the charging / discharging gun 10. The touch screen display screen 115 provides a more intuitive and convenient operation mode for the user, and the user can easily set the charging / discharging time through the touch screen without using additional buttons or knobs.

[0056] In an embodiment, with reference to Figure 5 , the control circuit board 112 is provided with a power module 1123 and a rectifier bridge stack 1124, and is further provided with a first relay 1121 in the live wire 1125 and a second relay 1122 in the zero line 1126. The power module 1123 is connected in parallel with the rectifier bridge stack 1124. The front and back ends of the first relay 1121 are respectively connected with the rectifier bridge stack 1124. The front and back ends of the second relay 1122 are respectively connected with the rectifier bridge stack 1124.

[0057] The power module 1123 is used to supply power to the control circuit board 112. The live wire 1125 and the zero line 1126 are respectively the main power supply lines when the charging / discharging gun 10 is working. The live wire 1125 and the zero line 1126 are controlled by the closing and opening of the first relay 1121 and the second relay 1122. Based on the design of the rectifier bridge stack 1124, when the first relay 1121 and the second relay 1122 are closed, the current needs to pass through the rectifier bridge stack 1124 before passing through the power module 1123, regardless of whether it is a charging process or a discharging process (i.e. regardless of whether the current flows from left to right or from right to left). In this way, the left and right live wires 1125 and zero lines 1126 can realize one-way conduction to the power module 1123. In this way, the power module can work first to supply power to the control circuit board, regardless of whether it is a charging process or a discharging process.

[0058] In an embodiment, the control circuit board 112 is provided with a relay module, and the input end and the output end of the relay module are respectively provided with a current sampling magnetic ring.

[0059] The relay module is an electronic switch used to control the on-off of the circuit. In the charging / discharging gun 10, the relay module is used to control the on-off of the charging / discharging circuit, thereby realizing the charging or discharging operation of the battery pack.

[0060] The current sampling magnetic ring is a non-contact current sensor for measuring the current passing through the wire. It utilizes the principle of electromagnetic induction. When there is current flowing through the wire, a magnetic field change will occur in the magnetic ring, which in turn generates an induced voltage. By measuring this induced voltage, the current value in the wire can be obtained.

[0061] By setting current sampling magnetic rings at the input and output ends of the relay module, the current value during the charging / discharging process can be measured and monitored in real time. This enables the control circuit board 112 to more accurately control the output of the current, thereby improving the accuracy and efficiency of charging / discharging. The current sampling magnetic ring can monitor the change of current in real time. Once an abnormality (such as overcurrent, short circuit, etc.) is found, the control circuit board 112 can take prompt measures, such as cutting off the power supply, to prevent equipment damage or the occurrence of safety accidents such as fire.

[0062] In an embodiment, the control circuit board 112 is provided with a temperature sensor.

[0063] The temperature sensor is a device that can measure the ambient temperature and convert it into an electrical signal output. In the charging / discharging gun 10, the temperature sensor is installed on the control circuit board 112 to monitor the temperature change during the charging / discharging process in real time. When the charging / discharging gun 10 starts working, the temperature sensor will continuously collect ambient temperature data and convert it into an electrical signal to send to the control circuit board 112. Based on the received temperature data, the control circuit board 112 can determine whether the current working temperature is within the safe range. If the temperature is too high or too low, the control circuit board 112 can take appropriate measures, such as adjusting the charging / discharging power, issuing an alarm, or cutting off the power supply, to ensure the safe operation of the equipment.

[0064] On the other hand, the embodiment also provides a charging / discharging assembly, comprising:

[0065] The charging / discharging gun 10 described above;

[0066] The conversion device 20 comprises a second pair of plug connectors 21 and a working head 23, the second pair of plug connectors 21 being electrically connected to the working head 23 through a third wire 22, and the second pair of plug connectors 21 being adapted to be plugged with the first pair of plug connectors 13 of the charging / discharging gun 10.

[0067] Similarly, based on the charging / discharging gun 10 of the embodiment, the charging / discharging assembly of the embodiment can realize different charging or discharging functions by selecting different conversion devices 20, having the advantages of wide adaptability and rich functions.

[0068] Optionally, the working head 23 is a plug 231, a cord 232, a power strip 233, or a car charger gun head 234.

[0069] Specifically, different working heads 23 can realize different functions, when the charging mode is selected, the gun head 12 of the charge-discharge gun 10 is inserted into the charging port of the electric vehicle, the first pair of plug connectors 13 are connected to the second pair of plug connectors 21 of the conversion device 20, the working head 23 of the conversion device 20 is a plug 231, and the plug 231 is connected to the mains power supply, so that the vehicle can be charged. When the discharge mode is selected and the charge-discharge resistor is adjusted, the gun head 12 of the charge-discharge gun 10 is still inserted into the charging port of the electric vehicle, and the working head 23 of the conversion device 20 at this time can be a wire throwing 232, a row of plugs 233 or a vehicle charging gun head 234. The wire throwing 232 can be connected to the house circuit breaker to supply power to the power-off house; the row of plugs 233 can supply power to various electric appliances; and the vehicle charging gun head 234 can be connected to another vehicle to charge the other vehicle.

[0070] In the description herein, it should be understood that the terms "upper", "lower", "left", "right", and the like orientation or position relationship are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", are only used to distinguish in the description, and have no special meaning.

[0071] In the description of the present specification, the description referring to the terms "an embodiment", "an example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0072] In addition, it should be understood that although the present specification is described in terms of embodiments, each embodiment does not necessarily contain only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

[0073] The technical principles of the present application are described above in conjunction with specific embodiments. These descriptions are only for the purpose of explaining the principles of the present application, and cannot be interpreted in any way as a limitation on the scope of protection of the present application. Based on the explanation here, those skilled in the art do not need to make creative efforts to think of other specific embodiments of the present application, and these embodiments will fall within the scope of protection of the present application.

Claims

1. A charge-discharge gun characterized by comprising: The utility model relates to a charging and discharging device, including: A control box (11) including a shell (111) and a control circuit board (112) installed in the shell (111), the control circuit board (112) is equipped with mode control module and resistance adjustment module, the shell (111) is installed with mode control piece (113) and resistance adjustment piece (114), mode control piece (113) is connected with mode control module, and the mode control piece (113) can trigger mode control module to switch charging mode and discharging mode, resistance adjustment piece (114) is connected with resistance adjustment module, and the resistance adjustment piece (114) can trigger resistance adjustment module to adjust charging and discharging resistance value; A gun head (12) connected with the control box (11) through a first wire (14); A first pair of plug connectors (13) connected with the control box (11) through a second wire (15).

2. The charge-discharge gun according to claim 1, wherein The resistance adjustment module includes a potentiometer (1127), the gun head (12) is provided with a PE pin and a CC pin, the PE pin and the CC pin are connected with the potentiometer (1127) through sub-wires in the first wire (14), and the resistance value between the PE pin and the CC pin is adjusted through the potentiometer (1127).

3. The charge-discharge gun according to claim 2, wherein The potentiometer (1127) includes a rotary adjustment handle, the resistance adjustment piece (114) is a knob structure, the resistance adjustment piece (114) is connected with the rotary adjustment handle, and the resistance of the potentiometer (1127) is adjusted through the rotation of the resistance adjustment piece (114).

4. The charge-discharge gun according to claim 1, wherein The shell (111) is also provided with a display screen (115), the display screen (115) is electrically connected with the control circuit board (112), and working parameters can be displayed through the display screen (115).

5. The charge-discharge gun according to claim 4, wherein The shell (111) includes a box base (1111) and a box upper cover (1112), the box upper cover (1112) is provided with a first hole site, a second hole site and a perspective window (11121), the mode control piece (113) is installed in the box upper cover (1112) in alignment with the first hole site, the resistance adjustment piece (114) is installed in the box upper cover (1112) in alignment with the second hole site, the display screen (115) is installed on the inner side of the box upper cover (1112) and aligns with the perspective window (11121), and the surrounding wall of the box base (1111) is provided with a sealing ring (1113), and the box upper cover (1112) is covered on the box base (1111) and closely attached to the sealing ring (1113).

6. The charge-discharge gun according to claim 1, wherein The control circuit board (112) is provided with a power module (1123) and a rectifier bridge stack (1124), and is also provided with a first relay (1121) in a fire line (1125) and a second relay (1122) in a zero line (1126), the power module (1123) is connected in parallel with the rectifier bridge stack (1124), the front and back ends of the first relay (1121) are connected with the rectifier bridge stack (1124) respectively, and the front and back ends of the second relay (1122) are connected with the rectifier bridge stack (1124) respectively.

7. The charge-discharge gun according to claim 1, wherein The control circuit board (112) is provided with a relay module, and the input end and the output end of the relay module are respectively provided with a current sampling magnetic ring.

8. The charge-discharge gun according to claim 1, wherein The control circuit board (112) is provided with a temperature sensor.

9. A charge and discharge assembly, characterized by, The application further discloses a charging and discharging gun (10) comprising the charging and discharging gun (10) and the conversion device (20). The conversion device (20) comprises a second pair of plug connectors (21) and a working head (23), the second pair of plug connectors (21) is electrically connected with the working head (23) through a third lead wire (22), and the second pair of plug connectors (21) is adapted to be connected with the first pair of plug connectors (13) of the charging and discharging gun (10) in a plug-in mode. The working head (23) is a plug (231), a wire whip (232), a row of plugs (233) or a car charging gun head (234).

10. The charge and discharge assembly of claim 9, wherein, ​

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