Arc suppression circuit for Type-C fast charging interface

Abstract

The utility model provides an electric arc suppression circuit for a Type-C fast charging interface, which comprises a power supply circuit, a vibration detection circuit, an MCU (Microprogrammed Control Unit) main control circuit and a Type-C fast charging interface power supply circuit, the output end of the power supply circuit is in power supply connection with the input end of the vibration detection circuit, the input end of the MCU main control circuit and the input end of the TypeC fast charging interface power supply circuit, and the output end of the MCU main control circuit is connected with the input end of the vibration detection circuit. The output end of the vibration detection circuit and the output end of the TypeC fast charging interface power supply circuit are in feedback connection with the power supply circuit, and the output end of the TypeC fast charging interface power supply circuit can receive power end load equipment. The Type-C fast charging interface has the beneficial effects that the possibility that the Type-C fast charging interface generates an electric arc can be reduced, and the energy level of the electric arc can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of circuit technology, and in particular to an arc suppression circuit for a Type-C fast charging interface. Background Art

[0002] Type-C is a USB interface that can be inserted regardless of the front or back. It is approximately 8.3mm×2.5mm in size and supports USB standard charging, data transmission, display output and other functions like other interfaces. USB PD is a fast charging specification developed by the USB-IF organization and is one of the current mainstream fast charging protocols. The USB PD fast charging protocol is output via the USB Type-C interface, but it cannot be said that a USB Type-C interface will definitely support USB PD protocol fast charging.

[0003] With the release of the fast charging protocol PD3.1, chargers that mainly use Type-C as the interface can support up to 240W charging power and a maximum charging voltage of 48V. When charging, hot plugging can easily generate arcs, and higher voltage differences can produce higher energy arcs. When hot plugging under a 240W load, the VBus pin can easily generate significant high-energy arcs, causing the charging connector to be melted and burned by the high-energy arcs. Therefore, to safely and reliably use the charging power of a 240W load, the energy level of the arc must be suppressed or reduced.

[0004] At present, there are two main ways to achieve this. One is to increase the load capacitance at the receiving end to suppress and reduce the energy level of the arc. The other is to detect whether the charging connector is unplugged through the change of the CC line or load current, and turn off the load and power supply in time to reduce the voltage difference, thereby reducing the probability of arc generation. However, the first implementation method mainly relies on the large capacitance of the load to resist, which is costly and the capacitor is easily damaged. The second method of turning off the load and power supply in time to reduce the voltage difference requires the cooperation of the power supply end and the receiving end, which makes the circuit complex, costly and unstable. Utility Model Content

[0005] In order to solve the problems in the prior art, the utility model provides an arc suppression circuit for a Type-C fast charging interface, by arranging a power supply circuit, a vibration detection circuit, an MCU main control circuit and a Type-C fast charging interface power supply circuit that cooperate with each other in the arc suppression circuit for the Type-C fast charging interface, the vibration detection circuit can judge the on-off state of the Type-C fast charging interface power supply circuit according to the vibration condition of the Type-C fast charging interface under the control of the MCU main control circuit and feed back to the power supply circuit, and the power supply circuit can adjust the power supply output to the Type-C fast charging interface power supply circuit according to the information fed back by the vibration detection circuit The electric voltage can detect in time whether the Type-C fast charging interface is unplugged, and reduce the power supply voltage of the Type-C fast charging interface before unplugging, thereby reducing the voltage difference between the power supply end and the receiving end, reducing the possibility of arcing and reducing the energy level of the arc. Moreover, it is only necessary to set an arc suppression circuit on the power supply end, and it can be realized without the need for circuit cooperation on the receiving end. The whole circuit structure is simple, stable and reliable, which solves the problems in the prior art that the high-power Type-C fast charging interface is prone to high-energy arcs that damage the connector, the cost of increasing the load capacitance of the receiving end is high and unstable, and the circuit is complex and costly to reduce the voltage difference by turning off the load and the power supply end in time.

[0006] The utility model provides an arc suppression circuit for a Type-C fast charging interface, comprising a power supply circuit, a vibration detection circuit, an MCU main control circuit and a Type-C fast charging interface power supply circuit, wherein the input end of the power supply circuit can be connected to AC power, the output end of the power supply circuit is connected to the input end of the vibration detection circuit, the input end of the MCU main control circuit and the input end of the Type-C fast charging interface power supply circuit for power supply, the output end of the MCU main control circuit is connected to the input end of the vibration detection circuit, the output end of the vibration detection circuit and the output end of the Type-C fast charging interface power supply circuit are feedback-connected to the power supply circuit, the output end of the Type-C fast charging interface power supply circuit can receive an electric end load device, the vibration detection circuit can judge the on-off state of the Type-C fast charging interface power supply circuit according to the vibration condition of the Type-C fast charging interface under the control of the MCU main control circuit and feed back to the power supply circuit, and the power supply circuit can adjust the supply voltage output to the Type-C fast charging interface power supply circuit according to the information fed back by the vibration detection circuit.

[0007] The utility model is further improved, and the power supply circuit is provided with interface J1, interface J2, interface J3, interface J4 and interface J5, the interface J1 is connected to the input end of the TypeC fast charging interface power supply circuit for power supply, the output end of the TypeC fast charging interface power supply circuit is feedback connected to the interface J2, the interface J4 is connected to the input end of the vibration detection circuit and the input end of the MCU main control circuit for power supply, the output end of the vibration detection circuit is feedback connected to the interface J5, and the interface J4 is grounded.

[0008] The utility model is further improved. The vibration detection circuit is provided with an acceleration sensor chip U2, a resistor R1, a resistor R2, a capacitor C1 and a capacitor C2, wherein the acceleration sensor chip U2 is provided with 12 pins, the second pin of the acceleration sensor chip U2 is connected to the output end of the MCU main control circuit and one end of the resistor R2, the 12th pin of the acceleration sensor chip U2 is connected to the output end of the MCU main control circuit and one end of the resistor R1, the other end of the resistor R1 is connected to the other end of the resistor R2 and the interface J4, the third pin of the acceleration sensor chip U2 is connected to one end of the capacitor C1 and the interface J4, the seventh pin of the acceleration sensor chip U2 is connected to one end of the capacitor C2 and the interface J4, the fifth pin of the acceleration sensor chip U2 is feedback-connected to the interface J5, and the eighth and ninth pins of the acceleration sensor chip U2, the other end of the capacitor C1, and the other end of the capacitor C2 are grounded.

[0009] The utility model is further improved, the MCU main control circuit is provided with a main control chip U1 and a capacitor C3, wherein the main control chip U1 is provided with 10 pins, the first pin of the main control chip U1 is connected to one end of the capacitor C3 and the interface J4, the third and fourth pins of the main control chip U1 are respectively connected to the second and twelfth pins of the acceleration sensor chip U2, and the tenth pin of the main control chip U1 and the other end of the capacitor C3 are grounded.

[0010] The utility model is further improved. A Type C fast charging interface J6 is provided in the Type C fast charging interface power supply circuit. The Type C fast charging interface J6 is provided with 12 pins. The A4 and A9 pins of the Type C fast charging interface J6 are connected to the interface J1. The A5 pin of the Type C fast charging interface J6 is feedback-connected to the interface J2. The B4 and B9 pins of the Type C fast charging interface J6 can accept the power-end load device. The A1, A5, A6, A7, A12, B1 and B12 pins of the Type C fast charging interface J6 are grounded.

[0011] The utility model is further improved, and the model of the acceleration sensor chip U2 is da218E.

[0012] The utility model is further improved, and the model of the main control chip U1 is FT61E14F-MRB.

[0013] The utility model is further improved, and the model of the TypeC fast charging interface J6 is TAPEC-AF-180.

[0014] The utility model is further improved. The condition for the acceleration sensor chip U2 to determine that the Type C fast charging interface power supply circuit is in a disconnected state is that the acceleration of the Type C fast charging interface during vibration is ≥ 0.1g, where g is the acceleration of gravity.

[0015] The utility model is further improved. When the acceleration of the Type C fast charging interface vibrates ≥ 0.1g, the power supply circuit reduces the power supply voltage output to the Type C fast charging interface power supply circuit to 20V; when the acceleration of the Type C fast charging interface vibrates < 0.1g and exceeds 4 seconds, the power supply circuit restores the power supply voltage output to the Type C fast charging interface power supply circuit to the maximum power supply voltage.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows: an arc suppression circuit for a Type-C fast charging interface is provided, by arranging a power supply circuit, a vibration detection circuit, an MCU main control circuit and a Type-C fast charging interface power supply circuit that cooperate with each other in the arc suppression circuit for the Type-C fast charging interface, the vibration detection circuit can judge the on-off state of the Type-C fast charging interface power supply circuit according to the vibration condition of the Type-C fast charging interface under the control of the MCU main control circuit and feed back to the power supply circuit, and the power supply circuit can adjust the output to the Type-C fast charging interface power supply circuit according to the information fed back by the vibration detection circuit The power supply voltage can detect in time whether the Type-C fast charging interface is unplugged, and reduce the power supply voltage of the Type-C fast charging interface before unplugging, thereby reducing the voltage difference between the power supply end and the receiving end, reducing the possibility of arcing and reducing the energy level of the arc. Moreover, it is only necessary to set an arc suppression circuit on the power supply end, and it can be achieved without the need for circuit cooperation on the receiving end. The whole circuit structure is simple, stable and reliable, which solves the problems in the prior art that the high-power Type-C fast charging interface is prone to high-energy arcs that damage the connector, the cost of increasing the load capacitance of the receiving end is high and unstable, and the circuit is complex and costly to reduce the voltage difference by turning off the load and the power supply end in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a functional block diagram of an arc suppression circuit for a Type-C fast charging interface of the utility model;

[0019] Figure 2 A circuit diagram of a power supply circuit of the utility model;

[0020] Figure 3 A circuit diagram of a vibration detection circuit of the utility model;

[0021] Figure 4 It is a circuit diagram of the MCU main control circuit of the utility model;

[0022] Figure 5 This is a circuit diagram of the Type C fast charging interface power supply circuit of the utility model. DETAILED DESCRIPTION

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present utility model; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model; the terms "including" and "having" and any variations thereof in the specification and claims of the present utility model and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present utility model or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order.

[0024] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0025] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0026] like Figure 1-5As shown, the utility model provides an arc suppression circuit for a Type-C fast charging interface, including a power supply circuit, a vibration detection circuit, an MCU main control circuit and a Type-C fast charging interface power supply circuit. The input end of the power supply circuit can be connected to AC power, and the output end of the power supply circuit is connected to the input end of the vibration detection circuit, the input end of the MCU main control circuit, and the input end of the Type-C fast charging interface power supply circuit. The output end of the MCU main control circuit is connected to the input end of the vibration detection circuit, the output end of the vibration detection circuit and the output end of the Type-C fast charging interface power supply circuit are feedback-connected to the power supply circuit, and the output end of the Type-C fast charging interface power supply circuit can accept an electric load device. In this embodiment, the vibration detection circuit can determine the on / off state of the Type-C fast charging interface power supply circuit according to the vibration of the Type-C fast charging interface under the control of the MCU main control circuit and feedback to the power supply circuit. The power supply circuit can adjust the power supply voltage output to the Type-C fast charging interface power supply circuit according to the information fed back by the vibration detection circuit, and can promptly detect whether the Type-C fast charging interface is unplugged, and reduce the power supply voltage of the Type-C fast charging interface before unplugging, thereby reducing the voltage difference between the power supply end and the power receiving end, reducing the possibility of arc generation and reducing the energy level of the arc, and only needs to set the arc suppression circuit on the power supply end, without the need for The circuit coordination at the receiving end can be realized, and the whole circuit structure is simple, stable and reliable; among them, the acceleration sensor chip U2 determines that the TypeC fast charging interface power supply circuit is in the disconnected state when the acceleration of the TypeC fast charging interface during vibration is ≥0.1g, where g is the acceleration of gravity; when the acceleration of the TypeC fast charging interface during vibration is ≥0.1g, the power supply circuit reduces the output voltage to the TypeC fast charging interface power supply circuit to 20V; when the acceleration of the TypeC fast charging interface during vibration is <0.1g and exceeds 4 seconds, the power supply circuit restores the output voltage to the TypeC fast charging interface power supply circuit as the highest power supply voltage.

[0027] like Figure 2 As shown, the power supply circuit is provided with interfaces J1, J2, J3, J4 and J5, interface J1 is connected to the input end of the TypeC fast charging interface power supply circuit, the output end of the TypeC fast charging interface power supply circuit is connected to interface J2 for feedback, interface J4 is connected to the input end of the vibration detection circuit and the input end of the MCU main control circuit, the output end of the vibration detection circuit is connected to interface J5 for feedback, and interface J4 is grounded. In this embodiment, the power supply circuit is used to supply power to the vibration detection circuit, the MCU main control circuit and the TypeC fast charging interface power supply circuit respectively.

[0028] like Figure 3As shown, the vibration detection circuit is provided with an acceleration sensor chip U2, a resistor R1, a resistor R2, a capacitor C1 and a capacitor C2, wherein the model of the acceleration sensor chip U2 is da218E, and the acceleration sensor chip U2 is provided with 12 pins, the 2nd pin of the acceleration sensor chip U2 is connected to the output end of the MCU main control circuit and one end of the resistor R2, the 12th pin of the acceleration sensor chip U2 is connected to the output end of the MCU main control circuit and one end of the resistor R1, the other end of the resistor R1 is connected to the other end of the resistor R2 and the interface J4, the 3rd pin of the acceleration sensor chip U2 is connected to one end of the capacitor C1 and the interface J4, the 7th pin of the acceleration sensor chip U2 is connected to one end of the capacitor C2 and the interface J4, the 5th pin of the acceleration sensor chip U2 is feedback-connected to the interface J5, and the 8th and 9th pins of the acceleration sensor chip U2, the other end of the capacitor C1, and the other end of the capacitor C2 are grounded. In this embodiment, the vibration detection circuit is used to detect whether the Type C fast charging interface generates vibration and whether the acceleration during vibration reaches a set threshold. The initial set threshold is 0.1g, where g is the acceleration of gravity. When a vibration exceeding the set threshold is detected, the level of pin 5 will be pulled up to feedback to interface J5, and the power supply circuit will reduce the supply voltage output to the Type C fast charging interface power supply circuit to 20V, thereby reducing the possibility of arcing when the plug is unplugged and reducing the energy level of the arc.

[0029] like Figure 4 As shown, the MCU main control circuit is provided with a main control chip U1 and a capacitor C3, wherein the model of the main control chip U1 is FT61E14F-MRB, and the main control chip U1 is provided with 10 pins, the first pin of the main control chip U1 is connected to one end of the capacitor C3 and the interface J4, the third and fourth pins of the main control chip U1 are respectively connected to the second and 12th pins of the acceleration sensor chip U2, and the tenth pin of the main control chip U1 and the other end of the capacitor C3 are grounded. In this embodiment, the MCU main control circuit is used to set a specific setting threshold of the vibration detection circuit.

[0030] like Figure 5As shown, a Type C fast charging interface J6 is provided in the Type C fast charging interface power supply circuit. The model of the Type C fast charging interface J6 is TAPEC-AF-180. The Type C fast charging interface J6 has 12 pins. The A4 and A9 pins of the Type C fast charging interface J6 are connected to the interface J1. The A5 pin of the Type C fast charging interface J6 is feedback connected to the interface J2. The B4 and B9 pins of the Type C fast charging interface J6 can accept the power end load device. The A1, A5, A6, A7, A12, B1, and B12 pins of the Type C fast charging interface J6 are grounded. In this embodiment, the Type C fast charging interface power supply circuit is used to charge the load device at the receiving end, and can also feedback the on / off status of the load device at the receiving end to the power supply circuit. When the Type C fast charging interface power supply circuit is disconnected from the load device at the receiving end, the A5 pin of the Type C fast charging interface J6 feedbacks information to the interface J2, and the power supply circuit turns off the power supply voltage; if it is not a false trigger signal caused by unplugging the plug but other vibrations, the power supply circuit only reduces the power supply voltage output to the Type C fast charging interface power supply circuit to 20V, and does not stop supplying power. When the acceleration of the Type C fast charging interface vibrates <0.1g and exceeds 4 seconds, the power supply circuit restores the power supply voltage output to the Type C fast charging interface power supply circuit as the maximum power supply voltage. In this embodiment, the maximum power supply voltage is 48V corresponding to 240W power.

[0031] As can be seen from the above, the utility model provides an arc suppression circuit for a Type-C fast charging interface, by arranging a power supply circuit, a vibration detection circuit, an MCU main control circuit and a Type-C fast charging interface power supply circuit that cooperate with each other in the arc suppression circuit for the Type-C fast charging interface, the vibration detection circuit can judge the on-off state of the Type-C fast charging interface power supply circuit according to the vibration condition of the Type-C fast charging interface under the control of the MCU main control circuit and feedback to the power supply circuit, and the power supply circuit can adjust the supply voltage output to the Type-C fast charging interface power supply circuit according to the information fed back by the vibration detection circuit , can promptly detect whether the Type-C fast charging interface is unplugged, and reduce the power supply voltage of the Type-C fast charging interface before unplugging, thereby reducing the voltage difference between the power supply end and the receiving end, reducing the possibility of arcing and reducing the energy level of the arc, and only needs to set an arc suppression circuit on the power supply end, and it can be achieved without the need for circuit cooperation on the receiving end. The entire circuit structure is simple, stable and reliable, and solves the problems in the prior art that the high-power Type-C fast charging interface is prone to high-energy arcs that damage the connector, the cost of increasing the load capacitance of the receiving end is high and unstable, and the circuit is complex and costly to reduce the voltage difference by turning off the load and the power supply end in time.

[0032] The specific implementation methods described above are preferred implementation methods of the present utility model, and are not intended to limit the specific implementation scope of the present utility model. The scope of the present utility model includes but is not limited to the specific implementation methods. All equivalent changes made in accordance with the present utility model are within the protection scope of the present utility model.

Claims

1. An arc suppression circuit for a Type-C fast charging interface, characterized in that: It includes a power supply circuit, a vibration detection circuit, an MCU main control circuit and a Type C fast charging interface power supply circuit. The input end of the power supply circuit can be connected to AC power. The output end of the power supply circuit is connected to the input end of the vibration detection circuit, the input end of the MCU main control circuit, and the input end of the Type C fast charging interface power supply circuit. The output end of the MCU main control circuit is connected to the input end of the vibration detection circuit. The output end of the vibration detection circuit and the output end of the Type C fast charging interface power supply circuit are feedback-connected to the power supply circuit. The output end of the Type C fast charging interface power supply circuit can accept an electric load device. The vibration detection circuit can judge the on-off state of the Type C fast charging interface power supply circuit according to the vibration condition of the Type C fast charging interface under the control of the MCU main control circuit and feedback to the power supply circuit. The power supply circuit can adjust the supply voltage output to the Type C fast charging interface power supply circuit according to the information fed back by the vibration detection circuit.

2. The arc suppression circuit for the Type-C fast charging interface according to claim 1, characterized in that: The power supply circuit is provided with interface J1, interface J2, interface J3, interface J4 and interface J5, the interface J1 is connected to the input end of the TypeC fast charging interface power supply circuit for power supply, the output end of the TypeC fast charging interface power supply circuit is feedback connected to the interface J2, the interface J4 is connected to the input end of the vibration detection circuit and the input end of the MCU main control circuit for power supply, the output end of the vibration detection circuit is feedback connected to the interface J5, and the interface J4 is grounded.

3. The arc suppression circuit for the Type-C fast charging interface according to claim 2, characterized in that: The vibration detection circuit is provided with an acceleration sensor chip U2, a resistor R1, a resistor R2, a capacitor C1 and a capacitor C2, wherein the acceleration sensor chip U2 is provided with 12 pins, the second pin of the acceleration sensor chip U2 is connected to the output end of the MCU main control circuit and one end of the resistor R2, the 12th pin of the acceleration sensor chip U2 is connected to the output end of the MCU main control circuit and one end of the resistor R1, the other end of the resistor R1 is connected to the other end of the resistor R2 and the interface J4, the third pin of the acceleration sensor chip U2 is connected to one end of the capacitor C1 and the interface J4, the seventh pin of the acceleration sensor chip U2 is connected to one end of the capacitor C2 and the interface J4, the fifth pin of the acceleration sensor chip U2 is feedback-connected to the interface J5, and the eighth and ninth pins of the acceleration sensor chip U2, the other end of the capacitor C1 and the other end of the capacitor C2 are grounded.

4. The arc suppression circuit for the Type-C fast charging interface according to claim 3, characterized in that: The MCU main control circuit is provided with a main control chip U1 and a capacitor C3, wherein the main control chip U1 is provided with 10 pins, the first pin of the main control chip U1 is connected to one end of the capacitor C3 and the interface J4, the third and fourth pins of the main control chip U1 are respectively connected to the second and twelfth pins of the acceleration sensor chip U2, and the tenth pin of the main control chip U1 and the other end of the capacitor C3 are grounded.

5. The arc suppression circuit for the Type-C fast charging interface according to claim 4, characterized in that: A TypeC fast charging interface J6 is provided in the TypeC fast charging interface power supply circuit, and the TypeC fast charging interface J6 is provided with 12 pins. The A4 and A9 pins of the TypeC fast charging interface J6 are connected to the interface J1, the A5 pin of the TypeC fast charging interface J6 is feedback connected to the interface J2, the B4 and B9 pins of the TypeC fast charging interface J6 can accept the power end load device, and the A1, A5, A6, A7, A12, B1, and B12 pins of the TypeC fast charging interface J6 are grounded.

6. The arc suppression circuit for the Type-C fast charging interface according to claim 5, characterized in that: The model of the acceleration sensor chip U2 is da218E.

7. The arc suppression circuit for the Type-C fast charging interface according to claim 6, characterized in that: The model of the main control chip U1 is FT61E14F-MRB.

8. The arc suppression circuit for the Type-C fast charging interface according to claim 7, characterized in that: The model of the TypeC fast charging interface J6 is TAPEC-AF-180.

9. The arc suppression circuit for the Type-C fast charging interface according to claim 8, characterized in that: The condition for the acceleration sensor chip U2 to determine that the Type C fast charging interface power supply circuit is in the disconnected state is that the acceleration of the Type C fast charging interface when vibrating is ≥ 0.1g, where g is the acceleration of gravity.

10. The arc suppression circuit for the Type-C fast charging interface according to claim 9, characterized in that: When the acceleration of the Type C fast charging interface vibrates ≥ 0.1g, the power supply circuit reduces the power supply voltage output to the Type C fast charging interface power supply circuit to 20V; when the acceleration of the Type C fast charging interface vibrates < 0.1g and exceeds 4 seconds, the power supply circuit restores the power supply voltage output to the Type C fast charging interface power supply circuit to the maximum power supply voltage.

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