Integrated plug and charging and discharging gun

Abstract

The utility model discloses an integrated plug and a charging and discharging gun. The integrated plug comprises a housing, a metal insertion rod, an auxiliary control circuit board and a cable assembly. The metal insertion rods comprise an L-level insertion rod, an N-level insertion rod, a PE-level insertion rod and at least one identification insertion rod. The auxiliary control circuit board comprises an MCU auxiliary control module, an electric leakage protection chip, an electric leakage detection module and a charging and discharging identification module. The electric leakage detection module is connected with the L-stage insertion rod, the N-stage insertion rod and the electric leakage protection chip, and the electric leakage detection module detects the electric leakage condition and feeds back the electric leakage condition to the electric leakage protection chip; the charging and discharging identification module is electrically connected with the identification insertion rod; the charging and discharging identification module identifies the level signal and feeds back the level signal to the MCU auxiliary control module so as to identify the charging and discharging state. According to the utility model, leakage protection and charge and discharge identification functions are integrated on the plug, leakage protection is realized at the plug end, and the power utilization safety of cables from a power supply to a gun body part can be ensured.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicle charging and discharging technology, specifically an integrated plug and charging / discharging gun. Background Technology

[0002] A charging / discharging gun is a device that performs charging or discharging functions. During the charging / discharging process, it needs to be connected to adapters or discharge connectors, and identification is required for the gun to perform the corresponding charging or discharging operation. At the same time, the internal temperature of the charging / discharging gun head can become too high during charging or discharging, posing a safety hazard. Therefore, temperature monitoring is necessary, and multiple safety tests such as current, voltage, and leakage current detection are also required.

[0003] Existing charging guns have the detection circuitry located inside the gun body. While this allows for timely detection, it doesn't guarantee the electrical safety of the cables running from the power source to the gun body. Furthermore, having all the detection circuitry inside the gun body complicates the circuitry and increases the size of the circuit boards, hindering miniaturization of the charging gun design. Utility Model Content

[0004] The purpose of this invention is to provide an integrated plug and charging / discharging gun that integrates leakage protection and charging / discharging identification functions to improve safety.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model patent discloses an integrated plug for connecting to the body of a charging / discharging gun. It includes a housing, a metal plug at the end of the housing, a secondary control circuit board inside the housing, and a cable assembly connected to the secondary control circuit board, the cable assembly extending outside the housing. The metal plug includes an L-level plug, an N-level plug, a PE-level plug, and at least one identification plug. The cable assembly includes an L-input line, an N-input line, and a PE input line. The secondary control circuit board includes an MCU secondary control module, a leakage protection chip, a leakage detection module, and a charging / discharging identification module. The leakage detection module is connected to the L-level plug, the N-level plug, and the leakage protection chip, detecting leakage and feeding back to the leakage protection chip. The charging / discharging identification module is electrically connected to the identification plug; it identifies the high and low levels of the signal and feeds back to the MCU secondary control module for charging / discharging status identification. The PE-level plug and the MCU secondary control module are both connected to the PE input line.

[0007] Furthermore, the cable assembly also includes a communication line.

[0008] Preferably, the secondary control circuit board further includes a temperature detection module, which is connected to the MCU secondary control module.

[0009] Furthermore, the cable assembly also includes a power supply line, and the secondary control circuit board also includes a voltage regulator module. The power supply line is connected to the voltage regulator module and then connected to the MCU secondary control module.

[0010] The secondary control circuit board also includes a power detection module, which is connected to the MCU secondary control module.

[0011] Preferably, the secondary control circuit board further includes a light indicator module, which is connected to the MCU secondary control module.

[0012] Preferably, the leakage current detection module is a metering current transformer.

[0013] This utility model also discloses a charging and discharging gun, including a gun body and the aforementioned integrated plug. The cable assembly of the integrated plug is pluggable and detachable connected to the gun body, or the cable assembly of the integrated plug is integrally connected to the gun body. A main control circuit board is disposed inside the gun body, and an MCU main control module is disposed on the main control circuit board. The MCU main control module is communicatively connected to an MCU sub-control module.

[0014] After adopting the above technical solution, the present invention has the following effects:

[0015] 1. This utility model integrates leakage protection and charge / discharge identification functions into the plug. Leakage protection at the plug end ensures electrical safety for the cables from the power source to the charging gun body. Furthermore, the charge / discharge identification circuit on the plug simplifies the detection circuitry of the charging gun body, enabling a miniaturized design.

[0016] 2. This utility model also integrates a temperature detection module, a power detection module, and an indicator light module into the plug, which can realize a variety of detection functions. The indicator light module can indicate different states of the plug.

[0017] 3. The voltage from the gun body is unstable due to the power supply line in the cable assembly. Therefore, a voltage regulator circuit is added to the secondary control circuit board of the plug to provide a stable power supply voltage to the plug end, which can ensure the normal use of the plug function. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of one embodiment of the charging and discharging gun of this utility model (the integrated plug is integrally connected to the gun body).

[0019] Figure 2 This is a schematic diagram of another embodiment of the charging and discharging gun of this utility model (the integrated plug is detachably connected to the gun body).

[0020] Figure 3 This is an electrical diagram showing the connection between an integrated plug and adapter.

[0021] Figure 4 This is a schematic diagram showing the connection between the integrated plug and the discharge connector.

[0022] Figure 5 This is a circuit structure block diagram of the present invention.

[0023] Figure 6 This is the circuit diagram for the MCU secondary control module.

[0024] Figure 7 This is the circuit connection diagram for the leakage current detection module.

[0025] Main component symbols:

[0026] 1: Integrated plug; 11: Housing; 12: Secondary control circuit board; 121: MCU secondary control module; 122: Leakage protection chip; 123: Leakage detection module; 124: Charge / discharge identification module; 125: Voltage regulator circuit module; 126: Temperature detection module; 127: Power detection module; 128: Indicator light module; 13: Cable assembly; 14: L-level plug; 15: N-level plug; 16: PE-level plug; 17: Identification plug; 2: Gun body; 21: Main control circuit board; 210: M CU main control module, 211: AC-DC power supply module, 212: second indicator module, 213: second temperature detection module, 214: CP generation and detection module, 215: ungrounded detection module, 216: output voltage detection module, 217: relay main control module, 218: relay sticking detection module, 219: circuit breaker engagement drive module, 220: relay disengagement drive module, 3: adapter, 31: docking socket, 4: discharge connector, 41: connector docking socket. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] The integrated plug 1 of this utility model is connected to the gun body 2 to form a charging and discharging gun. For example... Figure 1 As shown, the integrated plug 1 is integrally connected to the gun body 2, as... Figure 2 As shown, the integrated plug 1 is detachably connected to the gun body 2. To facilitate the use of the integrated plug, the integrated plug 1 of this application is more suitable for detachable scenarios, and can be sold and replaced separately for use with different gun bodies 2.

[0029] The charging gun body 2 connects to the vehicle. When the charging gun is charging, the integrated plug 1 can be plugged into the mains power supply to charge the vehicle (high-range charging); or as... Figure 3As shown, the integrated plug 1 is first connected to the adapter 3 (16A to 10A converter), and then the adapter 3 is plugged into the AC power terminal to charge the car (low-level charging). Figure 4 As shown. When the charging gun discharges, the integrated plug 1 is plugged into the discharge socket 4 to discharge. The discharge socket 4 can be connected to one or more loads, such as electrical products (e.g., lights, ovens, fans, electronic smart devices).

[0030] The integrated plug 1 of this utility model includes a housing 11, a metal plug at the end of the housing, a secondary control circuit board 12 disposed inside the housing, and a cable assembly 13 connected to the secondary control circuit board 12. The cable assembly extends out of the housing to connect with the gun body 2.

[0031] like Figures 2-4 As shown, the metal connector includes an L-level connector 14, an N-level connector 15, a PE-level connector 16, and at least one identification connector 17. The identification connector 17 is plugged in to mate with a socket on a mating accessory, such as the mating socket 31 on the adapter 3, or the socket 41 on the discharge connector 4. The cable assembly includes an L-level input line, an N-level input line, a PE-level input line, a communication line, and a power supply line. The PE-level connector 16 and the MCU sub-control module 121 are both connected to the PE input line.

[0032] Combination Figure 5 As shown, the secondary control circuit board includes: an MCU secondary control module 121, a leakage protection chip 122, a leakage detection module 123, and a charge / discharge identification module 124. Further, it may also include: a voltage regulator circuit module 125, a temperature detection module 126, a power detection module 127, and an indicator light module 128, etc. Combined with... Figure 6 As shown, the MCU sub-control module 121 is an existing MCU module, responsible for realizing intelligent control, communication management, safety protection and status monitoring of the charging and discharging process. Existing models such as ARM Cortex-M series, RISC-V, STM32, etc. can be used.

[0033] The residual current device (RCD) 122 is a device used in electrical wiring to detect whether there is leakage current in the equipment. When leakage occurs, the RCD 122 quickly cuts off the circuit to protect the user's safety. The RCD 122 is an existing chip, such as the FM2168, D55126, SJWCH54123A, or D55125ADA.

[0034] Combination Figure 7As shown, one end of the leakage current detection module 123 is connected to the L-level and N-level plugs, and the other end is connected to the leakage current protection chip. The leakage current detection module detects leakage current and feeds it back to the leakage current protection chip. The leakage current detection module is either a general-purpose current transformer or a metering current transformer H1. The accuracy requirement for metering transformers is higher than that for general-purpose transformers. Generally, the accuracy of metering transformers is typically 0.1 or 0.2 class to meet the precise requirements of electricity metering. (Combined with...) Figure 7 As shown, after the L and N input lines pass through the metering current transformer H1, they sense uneven current through the internal coil. Then, the HT1 (5 6 7 8) pins collect the signal as an electrical signal through the resistor. The signal is then fed back to the MCU secondary control module through the RC resistor and capacitor in a differential signal mode to indicate the current leakage status.

[0035] The charge / discharge identification module 124 is electrically connected to the identification plug 17. The charge / discharge identification module 124 identifies the high and low levels of the signal and feeds this information back to the MCU sub-control module 121 for charge / discharge status identification. The charge / discharge identification module 124 includes a charge / discharge identification terminal with at least one set of pins. This at least one set of pins is connected in series with an electronic component or circuit capable of changing physical characteristics and then connected to the MCU sub-control module 121. The electronic component or circuit capable of changing physical characteristics can be an electronic component or circuit capable of changing resistance, voltage, or current. Specifically, the charge / discharge identification module can be configured with a circuit structure as disclosed in publication number CN115693855A.

[0036] One end of the voltage regulator module 125 is connected to the power supply line, and the other end is connected to the MCU sub-control module 121. Because the voltage from the gun body is unstable due to the power supply line (VDC), a voltage regulator module 125 is added to the plug end. The voltage regulator module 125 provides a stable power supply voltage, ensuring the normal functioning of the integrated plug of this invention. The regulated VCC voltage provides a stable voltage to the MCU sub-control module 121 and also provides a stable voltage to the power detection module 127, enabling the voltage and current detection functions to operate normally.

[0037] The temperature detection module 126 is connected to the MCU secondary control module 121. The temperature detection module 126 feeds back the level signal change to the I / O port (Temp-CT-26) of the MCU secondary control module, and the MCU secondary control module processes the identification and switching of the plug temperature and current.

[0038] The power detection module 127 is connected to the MCU secondary control module 121. The power detection module 127 includes a power detection chip and voltage and current detection circuits. The voltage detection circuit divides the input L-phase and N-phase voltages using series resistors, then collects the corresponding voltage and sends it to the power detection chip. The data is transmitted to the MCU secondary control module for processing via serial port data transmission. The current detection circuit induces current through a current transformer coil, collects the current through resistors, and then transmits the electrical signal to the power detection chip after passing through a series of resistors and capacitors. This signal is also transmitted to the MCU secondary control module for processing via serial port data transmission. The power detection chip can be an existing integrated voltage and current detection chip, such as the BL0930F chip.

[0039] This utility model also discloses a charging and discharging gun. The cable assembly 13 of the integrated plug 1 is pluggably connected to the gun body 2, or the cable assembly 13 of the integrated plug 1 is integrally connected to the gun body. A main control circuit board is installed inside the gun body, and an MCU main control module 210 is installed on the main control circuit board. The MCU main control module 210 is an existing MCU module responsible for intelligent control, communication management, safety protection, and status monitoring during the charging and discharging process. Existing models such as ARM Cortex-M series, RISC-V, and STM32 can be used. The MCU main control module 210 is communicatively connected to the MCU secondary control module 121. The communication connection can be achieved through data transmission via a communication line or wireless communication. The main control circuit board 21 is also equipped with the following circuits: AC-DC power supply module 211, second light indicator module 212, second temperature detection module 213, CP generation and detection module 214, ungrounded detection module 215, output voltage detection module 216, relay main control module 217, relay sticking detection module 218, circuit breaker engagement drive module 219, and relay disengagement drive module 220.

[0040] The above description is only a preferred embodiment of the present utility model. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. An integrated plug for connecting to the body of a charging / discharging gun, characterized in that: It includes a housing, a metal plug at the end of the housing, a secondary control circuit board inside the housing, and a cable assembly connected to the secondary control circuit board, wherein the cable assembly extends out of the housing; The metal plug includes an L-level plug, an N-level plug, a PE-level plug, and at least one identification plug; the cable assembly includes an L input line, an N input line, and a PE input line. The secondary control circuit board includes: an MCU secondary control module, a leakage protection chip, a leakage detection module, and a charge / discharge identification module; The leakage detection module is connected to the L-level plug, the N-level plug, and the leakage protection chip. The leakage detection module detects leakage and feeds it back to the leakage protection chip. The charge / discharge identification module is electrically connected to the identification plug. The charge / discharge identification module identifies the high and low levels of the signal and feeds it back to the MCU sub-control module for identifying the charge / discharge status. Both the PE-level plug and the MCU sub-control module are connected to the PE input line.

2. The integrated plug as described in claim 1, characterized in that: The cable assembly also includes a communication line.

3. The integrated plug as described in claim 1, characterized in that: The secondary control circuit board also includes a temperature detection module, which is connected to the MCU secondary control module.

4. The integrated plug as described in claim 1, characterized in that: The cable assembly also includes a power supply line, and the secondary control circuit board also includes a voltage regulator module. The power supply line is connected to the voltage regulator module and then connected to the MCU secondary control module.

5. The integrated plug as described in claim 1, characterized in that: The secondary control circuit board also includes a power detection module, which is connected to the MCU secondary control module.

6. The integrated plug as described in claim 1, characterized in that: The secondary control circuit board also includes a light indicator module, which is connected to the MCU secondary control module.

7. The integrated plug as described in claim 1, characterized in that: The leakage current detection module is a metering current transformer.

8. A charging and discharging gun, characterized in that: The device includes a gun body and an integrated plug as described in any one of claims 1 to 7, wherein the cable assembly of the integrated plug is pluggably connected to the gun body, or the cable assembly of the integrated plug is integrally connected to the gun body; a main control circuit board is provided inside the gun body, and an MCU main control module is provided on the main control circuit board, wherein the MCU main control module is communicatively connected to an MCU secondary control module.

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