A high-safety AC charging pile monitoring circuit with automatic power-off function

Abstract

This utility model provides an automatic power-off high-safety AC charging pile monitoring circuit, belonging to the field of AC charging pile circuit monitoring technology. It solves the problem that improper installation, loose wiring, or aging terminals after prolonged use of existing AC charging piles can easily lead to serious safety hazards when starting charging. This automatic power-off high-safety AC charging pile monitoring circuit includes an AC charging pile mainboard, which integrates a live wire terminal, a neutral wire terminal, a gun neutral wire terminal, a gun live wire terminal, two high-power relays, and an MCU control unit. Temperature sensors are installed between the live and neutral wire terminals, and between the gun neutral and gun live wire terminals. Insulating thermally conductive adhesive is applied between the live and neutral wire terminals, and similarly between the gun neutral and gun live wire terminals. This utility model has the advantage of avoiding fire hazards caused by improper installation or aging terminals of the charging pile wiring.

Description

Technical Field

[0001] This utility model belongs to the field of AC charging pile circuit monitoring technology, and relates to an automatic power-off high-safety AC charging pile monitoring circuit. Background Technology

[0002] Currently, if AC charging piles are not installed properly and the wiring is loose (poor connection, wires not making complete contact) or if the terminals of AC charging piles are aged after long-term use, the temperature of the terminals will exceed the set temperature. If the charging pile continues to charge under these circumstances, it is extremely easy to cause serious safety hazards.

[0003] Therefore, the applicant provides a high-safety AC charging pile monitoring circuit that can collect and monitor the temperature changes of the terminal in real time and cut off the circuit to prevent equipment damage and a series of safety hazards. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by providing an automatic power-off high-safety AC charging pile monitoring circuit with circuit temperature monitoring function.

[0005] The purpose of this utility model can be achieved through the following technical solution: an automatic power-off high-safety AC charging pile monitoring circuit, characterized in that it includes an AC charging pile motherboard, on which are integrated a live wire terminal, a neutral wire terminal, a gun neutral wire terminal, a gun live wire terminal, two high-power relays and an MCU control unit. Temperature sensors are provided between the live wire terminal and the neutral wire terminal, and between the gun neutral wire terminal and the gun live wire terminal. Insulating thermally conductive adhesive is coated between the live wire terminal and the neutral wire terminal, and insulating thermally conductive adhesive is also coated between the gun neutral wire terminal and the gun live wire terminal.

[0006] In the above-mentioned automatic power-off high-safety AC charging pile monitoring circuit, the two temperature sensors are temperature sensor one and temperature sensor two. Temperature sensor one has resistors R110 and R111, and temperature sensor two has resistors R109 and R112.

[0007] In the aforementioned automatic power-off high-safety AC charging pile monitoring circuit, the MCU control unit includes signal J-1 and signal J-2. Signal J-1 has a first on / off circuit with the corresponding high-power relay, and signal J-2 has a second on / off circuit with the corresponding high-power relay.

[0008] Compared with existing technologies, this automatic power-off high-safety AC charging pile monitoring circuit has the advantage of avoiding fire hazards caused by improper installation of charging pile wiring terminals or aging terminals, and can provide early warnings through mini-programs or other terminal devices. Attached Figure Description

[0009] Figure 1 This is a circuit diagram for a temperature sensor to collect resistance values.

[0010] Figure 2 This is a circuit diagram of an MCU control unit that receives resistance signals and outputs control signals.

[0011] Figure 3 This is a circuit diagram showing the connection and disconnection between the MCU control unit and the high-power relay.

[0012] Figure 4 This is a 3D diagram of the AC charging pile motherboard.

[0013] Figure 5 This is the main view of the AC charging pile motherboard.

[0014] In the diagram, 1. AC charging pile mainboard; 2. Power line inlet; 3. Neutral line inlet; 4. Gun neutral line inlet; 5. Gun power line inlet; 6. High-power relay; 7. MCU control unit; 8. Insulating thermal conductive adhesive; 9. Temperature sensor one; 10. Temperature sensor two; 11. On / off circuit one; 12. On / off circuit two. Detailed Implementation

[0015] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0016] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, this automatic power-off high-safety AC charging pile monitoring circuit includes an AC charging pile main board 1. The main board 1 integrates a live wire terminal 2, a neutral wire terminal 3, a neutral wire terminal 4, a live wire terminal 5, two high-power relays 6, and an MCU control unit 7. A loose connection at any of the live wire terminals 2, 3, 4, or 5 will cause overheating. Temperature sensors are installed between the live wire terminal 2 and the neutral wire terminal 3, and between the neutral wire terminal 4 and the live wire terminal 5. Furthermore, an insulating coating is applied between the live wire terminal 2 and the neutral wire terminal 3. Insulating thermally conductive adhesive 8 is also applied between the gun neutral wire terminal 4 and the gun power wire terminal 5. When a loose connection occurs (any one of the power wire terminal 2, neutral wire terminal 3, gun neutral wire terminal 4, or gun power wire terminal 5 is loosely connected), the loose connection terminal will heat up during operation. After exceeding the predetermined temperature value, the heat will be conducted through the insulating thermally conductive adhesive 8. The corresponding temperature sensor will sense the temperature, and its resistance value will change significantly with the change of ambient temperature. The temperature signal will be transmitted to the MCU control unit 7. The MCU control unit 7 will output a signal to disconnect the circuit connected to the high-power relay 6, and the charging pile will be immediately powered off.

[0017] like Figure 1 As shown, the two temperature sensors are temperature sensor 9 (for...). Figure 1 TEMP1) and temperature sensor 210 (for Figure 1 In the TEMP2), temperature sensor 9 has resistors R110 and R111, and temperature sensor 10 has resistors R109 and R112. When the resistance values ​​change, the voltage of the temperature sensor changes, and the change signal is transmitted to the MCU control unit 7.

[0018] like Figure 3 As shown, the MCU control unit 7 includes signal J-1 and signal J-2. Signal J-1 has a first on / off circuit 11 with the corresponding high-power relay 6, and signal J-2 has a second on / off circuit 12 with the corresponding high-power relay 6. According to the signal sent by the temperature sensor, the MCU control unit 7 outputs the corresponding J signal and cuts off the circuit with the high-power relay 6, and the charging pile is immediately powered off.

[0019] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0020] Although this document frequently uses terms such as AC charging pile motherboard 1, live wire terminal 2, neutral wire terminal 3, gun neutral wire terminal 4, gun live wire terminal 5, high-power relay 6, MCU control unit 7, insulating thermally conductive adhesive 8, temperature sensor one 9, temperature sensor two 10, circuit continuity one 11, circuit continuity two 12, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. An automatic power-off high-safety alternating current charging pile monitoring circuit, characterized in that, The AC charging pile motherboard (1) integrates a live wire terminal (2), a neutral wire terminal (3), a gun neutral wire terminal (4), a gun live wire terminal (5), two high-power relays (6) and an MCU control unit (7). Temperature sensors are provided between the live wire terminal (2) and the neutral wire terminal (3) and between the gun neutral wire terminal (4) and the gun live wire terminal (5). Insulating thermally conductive adhesive (8) is applied between the live wire terminal (2) and the neutral wire terminal (3), and insulating thermally conductive adhesive (8) is also applied between the gun neutral wire terminal (4) and the gun live wire terminal (5).

2. The automatic power-off high-safety alternating current charging pile monitoring circuit according to claim 1, characterized in that, The temperature sensors are temperature sensor one (9) and temperature sensor two (10), the temperature sensor one (9) has resistors R110 and R111, and the temperature sensor two (10) has resistors R109 and R112.

3. The automatic power-off high-safety AC charging pile monitoring circuit according to claim 1, characterized in that, The MCU control unit (7) includes signal J-1 and signal J-2. Signal J-1 has a first on / off circuit (11) with the corresponding high-power relay (6), and signal J-2 has a second on / off circuit (12) with the corresponding high-power relay (6).

Images