Vehicle-mounted high-power discharge socket

Abstract

A vehicle-mounted high-power discharge socket disclosed by the present invention comprises a base and a panel, the panel is provided with an AC / DC output port, a reset button and a display lamp, the AC / DC output port comprises an AC jack and a USB interface, the panel is also pivotally connected with a flip cover used for protecting the jack, one side of the jack is provided with a reed switch, and the other side of the jack is provided with a USB interface. A magnetic block matched with a reed on one side of the jack is arranged on the inner side of the flip cover, and on-off of an internal circuit of the jack is realized by opening and closing the flip cover. The socket at least has the prominent effects that the socket has the functions of current protection and over-temperature protection, input voltage detection and electric leakage protection, a circuit can be cut off in time when the current is overloaded or over-voltage or the temperature is high, and the use safety of the socket is greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of automotive socket control, and particularly relates to a vehicle-mounted high-power discharge socket. Background Art

[0002] Automobiles are indispensable means of transportation in people's lives. An inverter is a device that can convert direct current electrical energy into alternating current electrical energy. Vehicle-mounted inverters are widely used in current electric vehicles, fuel vehicles, or hybrid vehicles. It can convert the direct current electrical energy stored in the vehicle for use by AC devices in the vehicle. At present, the output sockets of vehicle-mounted inverters on the market have relatively single functions. When encountering situations such as current overload or overheating during use, it is easy to cause component damage, pose safety risks, and lead to unstable system operation. Summary of the Invention

[0003] In view of the above-mentioned defects existing in the prior art, the purpose of the present invention is to provide a vehicle-mounted high-power discharge socket, and the socket has functions such as overcurrent protection and over-temperature protection, which can effectively improve the use safety of the socket.

[0004] The purpose of the present invention will be achieved through the following technical solutions: A vehicle-mounted high-power discharge socket includes a base and a panel. An electrical output port and a reset button are provided on the panel. The electrical output port includes a jack and a USB interface. A flip cover for protecting the jack is pivotally connected to the panel. A Hall element is provided on one side of the jack, and a magnet for matching with the Hall element on one side of the jack is provided inside the flip cover. The opening and closing of the flip cover realizes the on-off of the internal circuit of the jack. A light guide ring is provided around the outer circle of the USB interface.

[0005] Preferably, the socket is further provided with a circuit control mechanism. The circuit control mechanism includes a high-voltage connector, a low-voltage connector, and an MCU. The high-voltage connector is connected to the jack end of the socket body through a current protection circuit. One end of the MCU is connected to the SW interface of the low-voltage connector through an enable drive circuit. The other end of the MCU is connected to the vbat jack pin end of the low-voltage connector through a voltage converter. The GND jack pin end of the low-voltage connector is also connected to a Hall element, and the other end of the Hall element is respectively connected to a first resistor and the EN end of the voltage converter. The low-voltage connector is also connected to a USB charging port.

[0006] Preferably, the detection end of the current protection circuit is connected to the MCU, and the current protection circuit includes an AC voltage detection circuit and a leakage current detection circuit.

[0007] Preferably, a second resistor is further connected between the reed switch and the GND jack pin end of the low-voltage connector.

[0008] Preferably, the GND USB pin end and the IGN pin end of the low-voltage connector are respectively connected to the PCBA circuit board, and the PCBA circuit board is connected to the USB charging port.

[0009] Preferably, the USB charging port includes a USB-A charging port and a USB-C charging port.

[0010] Preferably, a reset button, a display lamp, and a temperature sensor are also connected to the MCU.

[0011] Preferably, the high-voltage connector is connected to the jack end through a relay, and the other end of the relay is connected to the MCU.

[0012] Preferably, a current sensor connected to the MCU is also provided between the relay and the high-voltage connector.

[0013] Preferably, a LIN communication mechanism is connected between the MCU and the low-voltage connector.

[0014] Preferably, the AC voltage detection circuit includes a first integrated circuit element connected to the high-voltage connector. The third pin of the first integrated circuit element is connected to the negative power supply terminal of the first operational amplifier through a second resistor. The fourth pin is sequentially connected to the positive power supply terminal of the first operational amplifier through a second capacitor and a fifth resistor. The supply voltage of the first operational amplifier is 3.3V. The output terminal of the first operational amplifier is connected to the MCU through a third resistor. A first capacitor and a first resistor are also connected in parallel between the output terminal of the second resistor and the input terminal of the third resistor. A fourth resistor is connected in parallel between the third pin and the fourth pin of the first integrated circuit element. The output terminal of the fifth resistor is connected to the sixth capacitor and the ninth resistor connected in parallel.

[0015] Preferably, the leakage current detection circuit includes a sixth detection resistor connected to the ground fault circuit breaker. The sixth detection resistor is connected to the negative power supply terminal of the first detection amplifier through a fourth detection capacitor. The first detection amplifier is connected to the positive power supply terminal of the second detection amplifier through a fifth detection resistor. The second detection amplifier is connected to a first diode. The first detection diode is connected to the MCU through a seventh detection resistor.

[0016] Preferably, a sixth detection capacitor and a second detection diode are connected in parallel to the sixth detection resistor. The live wire terminal of the ground fault circuit breaker is respectively connected to a fourth detection resistor and an eighth detection resistor. The other end of the fourth detection resistor is connected to a first detection resistor. The other end of the eighth detection resistor is connected to an eleventh detection resistor. A third detection capacitor is connected in parallel to the output terminals of the eighth detection resistor and the fourth detection resistor. A first detection capacitor and a second detection resistor are connected in parallel between the output terminal of the fourth detection capacitor and the output terminal of the first detection amplifier. The output terminal of the first detection amplifier is connected to the negative power input terminal of the fourth detection amplifier. The positive power input terminal of the fourth detection amplifier is connected to the output terminal of the third detection amplifier. The output terminal of the fourth detection amplifier is connected to a first detection diode. A tenth detection resistor is also connected in parallel to the fourth detection amplifier. A third detection resistor is connected in parallel between the positive power input terminal and the output terminal of the second detection amplifier.

[0017] The outstanding effects of the present invention are at least reflected in that the present invention can have functions of current protection, over-temperature protection, input voltage detection, and leakage protection. When the current is overloaded or over-voltage occurs or the temperature is relatively high, the circuit can be cut off in time, greatly improving the use safety of the socket.

[0018] The following will further detail the specific implementation manners of the present invention in conjunction with the accompanying drawings of the embodiments, so that the technical solutions of the present invention are easier to understand and master. Brief Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for description in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic diagram of the connection structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the AC voltage detection circuit in the present invention.

[0022] Figure 3 It is a schematic diagram of the leakage current detection circuit in the present invention. Detailed Description of the Preferred Embodiment

[0023] The present invention provides a vehicle-mounted high-power discharge socket, which includes a base and a panel. An electrical output port and a reset button are arranged on the panel. The electrical output port includes a jack and a USB interface. A flip cover for protecting the jack is pivotally connected to the panel. A Hall element is arranged on one side of the jack, and a magnet for matching with the Hall element on one side of the jack is arranged inside the flip cover. The opening and closing of the flip cover realizes the on-off of the internal circuit of the jack. A light guide ring is arranged around the outer circle of the USB interface. In this embodiment, the electrical output port is an AC / DC output port, and the jack is an AC jack.

[0024] A control mechanism is arranged inside the base. As shown in combination with Figures 1 - 3 the figure, the control mechanism includes a high-voltage connector 1, a low-voltage connector 2 and an MCU 3. A reset button 38, a display lamp and a temperature sensor 9 are connected to the MCU 3. The display lamp includes a socket backlight 39 and a socket status indicator 30. Usually, the socket backlight 39 is in a constantly lit state when powered on, while the socket status indicator 30 will display different colors due to different states. For example, it is green in the normal state and red if a fault occurs. And according to different situations, the status indicator 30 flashes at different flashing frequencies for flashing indication. The system can be restarted through the reset button 38. The temperature sensor 9 is used to sense the temperature inside the system. When the temperature exceeds the temperature threshold set by the system, the output AC voltage will be cut off.

[0025] The high-voltage connector 1 is connected to the jack end of the socket body through a current protection circuit. The detection end of the current protection circuit is connected to the MCU 3. The current protection circuit includes an AC voltage detection circuit 31 and a leakage current detection circuit 32. The leakage current detection circuit 32 can cut off the output AC voltage when the output leakage current is greater than 3.5 mA.

[0026] In this embodiment, three jacks are provided, namely a first jack 4, a second jack 5 and a third jack 6. The first jack 4 and the second jack 5 are 10A jacks respectively, and the third jack 6 is a 16A jack.

[0027] Furthermore, the high-voltage connector 1 is connected to the jack end through a relay, and the other end of the relay is connected to the MCU 3. In this embodiment, the AC-L end of the high-voltage connector 1 is connected to a first current sensor 34. One end of the first current sensor 34 is connected to a first relay 36, and the other end of the first relay 36 is connected to the 10A jack. The AC-L end of the high-voltage connector 1 is also connected to a second current sensor 35. The other end of the second current sensor 35 is connected to a second relay 37, and the other end of the second relay 37 is connected to the 16A jack.

[0028] One end of the MCU 3 is connected to the SW interface of the low-voltage connector 2 through the enable drive circuit 23; the other end of the MCU 3 is connected to the vbat jack pin end of the low-voltage connector 2 through the voltage converter 21; the GND jack pin end of the low-voltage connector 2 is connected to the second resistor R2, the other end of the second resistor R2 is connected to the reed switch 22, and the other end of the reed switch 22 is respectively connected to the first resistor R1 and the EN end of the voltage converter 21. The reed switch 22 will be linked with the cover of the socket to initially judge whether to output external current by whether the cover is opened or not. There is also a LIN communication mechanism 25 connected between the MCU 3 and the low-voltage connector 2, and the LIN signal is output via the low-voltage connector 2 through the LIN communication mechanism 25. During actual in-vehicle use, when a fault occurs in the socket HUB, the LIN chip sends a fault signal to the BCM / host, and the BCM / host immediately shuts off the high-voltage output to avoid the periphery of the socket being charged.

[0029] The low-voltage connector 2 is also connected to the USB charging port. Specifically, the GND USB pin end and the IGN pin end of the low-voltage connector are respectively connected to the PCBA circuit board 24, and the PCBA circuit board 24 is connected to the USB charging port. The USB charging port includes a USB-A charging port 7 and a USB-C charging port 8.

[0030] The AC voltage detection circuit 31 includes a first integrated circuit element 311 connected to the high-voltage connector. Specifically, the AC_L end of the high-voltage connector is connected to the first pin of the first integrated circuit element 311, and the AC_N end of the high-voltage connector is sequentially connected to the second pin of the first integrated circuit element 311 via the sixth resistor 315 and the seventh resistor 316. The third pin of the first integrated circuit element 311 is connected to the negative power supply end of the first operational amplifier 314 through the second resistor 312, and the fourth pin is sequentially connected to the positive power supply end of the first operational amplifier 314 through the second capacitor and the fifth resistor 131. The supply voltage of the first operational amplifier 314 is 3.3v. The output end of the first operational amplifier 314 is connected to the MCU through the third resistor. A first capacitor 317 and a first resistor 318 are also connected in parallel between the output end of the second resistor 312 and the input end of the third resistor; a fourth resistor is connected in parallel between the third pin and the fourth pin of the first integrated circuit element 311; the output end of the fifth resistor 313 is connected to the parallel-connected sixth capacitor and ninth resistor. The other end of the ninth resistor is connected to the eighth resistor with a supply voltage of 3.3V.

[0031] The leakage current detection circuit 32 includes a sixth detection resistor 321 connected to the ground fault circuit breaker, the sixth detection resistor 321 is connected to the negative power supply terminal of the first detection amplifier 323 through the fourth detection capacitor 322, the first detection amplifier 323 is connected to the positive power supply terminal of the second detection amplifier 325 through the fifth detection resistor 324, the second detection amplifier 325 is connected to the first diode 326, and the first detection diode 326 is connected to the MCU through the seventh detection resistor 327. The sixth detection capacitor and the second detection diode 3213 are connected in parallel to the sixth detection resistor 321. The live wire end of the ground fault circuit breaker is connected to the fourth detection resistor 3211 and the eighth detection resistor 3212 respectively, the other end of the fourth detection resistor 3211 is connected to the first detection resistor, the other end of the eighth detection resistor 3212 is connected to the eleventh detection resistor, and the output end of the eighth detection resistor 3212 and the output end of the fourth detection resistor 3211 are connected in parallel with the third detection capacitor. A first detection capacitor and a second detection resistor are connected in parallel between the output end of the fourth detection capacitor 322 and the output end of the first detection amplifier 323. The output end of the first detection amplifier 323 is connected to the negative power input end of the fourth detection amplifier 329, the positive power input end of the fourth detection amplifier 329 is connected to the output end of the third detection amplifier 328, the output end of the fourth detection amplifier 329 is connected to the first detection diode 326, the fourth detection amplifier 329 is also connected in parallel with a tenth detection resistor, and a third detection resistor is connected in parallel between the positive power input end and the output end of the second detection amplifier 325. The power supply voltage of the first detection resistor and the first detection amplifier 323 is 3.3v.

[0032] In order to better understand the present invention, the working principle and action of the vehicle-mounted high-power discharge socket are described below.

[0033] Under normal circumstances, the OBC will be connected to this socket, and the control mechanism will give the OBC a 12V level, so that the OBC will generate AC voltage output and realize charging. At the same time, after the high-voltage output port detects the AC voltage, the backlight will light up. When the relay is closed, there is AC voltage in the socket part, and the indicator light is green.

[0034] If an error state is detected, the relay will be turned on, and the socket will have no AC voltage. At the same time, a low level is given to the OBC, and the OBC stops AC output. The indicator light is red and flashes. When the fault is eliminated, by pressing the reset button, the high-voltage socket will give the OBC a high level again, so that the OBC generates AC voltage output.

[0035] When the lid is detected to be closed, a low level is given to the OBC, and the OBC stops outputting AC voltage. The background light goes out.

[0036] The present invention has various embodiments, and all technical solutions formed by using equivalent transformations or equivalent substitutions fall within the protection scope of the present invention.

Claims

1. A vehicle-mounted high-power discharge socket, characterized in that: It includes a base and a panel. An electrical output port and a reset button are provided on the panel. The electrical output port includes a jack and a USB interface. A flip cover for protecting the jack is pivotally connected to the panel. A Hall element is provided on one side of the jack, and a magnet for matching with the Hall element on one side of the jack is provided inside the flip cover. The opening and closing of the flip cover realizes the on-off of the internal circuit of the jack. A light guide ring is provided around the outer circle of the USB interface.

2. The on-vehicle high-power discharge socket according to claim 1, wherein: The socket is further provided with a circuit control mechanism, which includes a high-voltage connector, a low-voltage connector and an MCU; the high-voltage connector is connected to the jack end of the socket body through a current protection circuit, and one end of the MCU is connected to the SW interface of the low-voltage connector through an enable drive circuit; the other end of the MCU is connected to the vbat jack pin end of the low-voltage connector through a voltage converter; a Hall element is also connected to the GND jack pin end of the low-voltage connector, and the other end of the Hall element is respectively connected to a first resistor and the EN end of the voltage converter; the low-voltage connector is also connected to a USB charging port.

3. The in-vehicle high-power discharge socket according to claim 2, characterized in that: The detection end of the current protection circuit is connected to the MCU, and the current protection circuit includes an AC voltage detection circuit and a leakage current detection circuit.

4. The vehicle-mounted high-power discharge socket according to claim 3, wherein: A second resistor is also connected between the reed switch and the GND jack pin end of the low-voltage connector.

5. The in-vehicle high-power discharge socket according to claim 4, characterized in that: The GNDUSB pin end and the IGN pin end of the low-voltage connector are respectively connected to a PCBA circuit board, and the PCBA circuit board is connected to the USB charging port.

6. The in-vehicle high-power discharge socket according to claim 5, wherein: The USB charging port includes a USB-A charging port and a USB-C charging port.

7. The vehicle-mounted high-power discharge socket according to claim 6, wherein: A reset button, a display lamp and a temperature sensor are also connected to the MCU.

8. The in-vehicle high-power discharge socket according to claim 7, wherein: The high-voltage connector is connected to the jack end through a relay, and the other end of the relay is connected to the MCU; a current sensor connected to the MCU is also provided between the relay and the high-voltage connector.

9. The vehicle-mounted high-power discharge socket according to claim 2, wherein: A LIN communication mechanism is connected between the MCU and the low-voltage connector.

10. The in-vehicle high-power discharge socket according to claim 3, characterized in that: The AC voltage detection circuit includes a first integrated circuit element connected to the high-voltage connector. The third pin of the first integrated circuit element is connected to the negative power supply end of the first operational amplifier through a second resistor, and the fourth pin is sequentially connected to the positive power supply end of the first operational amplifier through a second capacitor and a fifth resistor. The output end of the first operational amplifier is connected to the MCU through a third resistor; a first capacitor and a first resistor are also connected in parallel between the output end of the second resistor and the input end of the third resistor; a fourth resistor is connected in parallel between the third pin and the fourth pin of the first integrated circuit element; the output end of the fifth resistor is connected to the sixth capacitor and the ninth resistor connected in parallel.

11. The on-vehicle high-power discharge socket according to claim 3, wherein: The leakage current detection circuit includes a sixth detection resistor connected to a ground fault circuit breaker. The sixth detection resistor is connected to the negative power supply end of the first detection amplifier through a fourth detection capacitor. The first detection amplifier is connected to the positive power supply end of the second detection amplifier through a fifth detection resistor. The second detection amplifier is connected to a first diode. The first detection diode is connected to the MCU through a seventh detection resistor.

12. The in-vehicle high-power discharge socket according to claim 10, wherein: A sixth detection capacitor and a second detection diode are connected in parallel to the sixth detection resistor. The live wire terminal of the ground fault circuit breaker is respectively connected to a fourth detection resistor and an eighth detection resistor. The other end of the fourth detection resistor is connected to a first detection resistor. The other end of the eighth detection resistor is connected to an eleventh detection resistor. A third detection capacitor is connected in parallel to the output terminals of the eighth detection resistor and the fourth detection resistor. A first detection capacitor and a second detection resistor are connected in parallel between the output terminal of the fourth detection capacitor and the output terminal of the first detection amplifier. The output terminal of the first detection amplifier is connected to the negative power input terminal of a fourth detection amplifier. The positive power input terminal of the fourth detection amplifier is connected to the output terminal of a third detection amplifier. The output terminal of the fourth detection amplifier is connected to a first detection diode. A tenth detection resistor is also connected in parallel to the fourth detection amplifier. A third detection resistor is connected in parallel between the positive power input terminal and the output terminal of the second detection amplifier.

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