Telescopic charging control circuit, control system and charging pile

By designing the control circuit and system for telescopic charging, the flexibility of automatic telescopic charging and manual charging is achieved, and the problems of easy damage to the charging device and inflexible charging methods in the prior art are solved.

CN222645849UActive Publication Date: 2025-03-21GUANGZHOU DABO INTELLIGENT TECH CO LTD
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Patent Information

Application Number
CN202420663505.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-01
Publication Date
2025-03-21
Estimated Expiration
2034-04-01

AI Technical Summary

Technical Problem

The existing parking AGV charging devices are prone to damage to the charging pile and parking AGV due to improper operation or excessive walking error during charging, and the charging method lacks flexibility.

Method used

A telescopic charging control circuit and system is designed, including switch control circuits, power supply circuits, telescopic charging interfaces, manual charging circuits and manual charging interfaces. Automatic telescopic charging is achieved through the motor-driven telescopic charging interface, and manual charging can be used when the automatic charging method fails.

Benefits of technology

Automatic telescopic charging is realized, which improves charging flexibility, avoids damage caused by improper operation or walking errors, and provides a backup method for manual charging.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a telescopic charging control circuit, a telescopic charging control system and a charging pile, the control circuit comprises a switch control circuit, a power supply circuit, a telescopic circuit, a telescopic charging interface, a manual charging circuit and a manual charging interface, and the switch control circuit is connected with the manual charging circuit. The power supply circuit is respectively connected with the manual charging circuit, the telescopic circuit, the telescopic charging interface and the manual charging interface, the telescopic circuit comprises a motor, an extension circuit and a retraction circuit, the motor is connected with the telescopic charging interface, the extension circuit and the retraction circuit, and the extension circuit and the retraction circuit are both connected with the switch control circuit. The utility model can realize automatic telescopic charging and improve the charging flexibility, and can be widely applied to the technical field of automatic guided vehicles.
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Description

Technical Field

[0001] The utility model relates to the technical field of automatic guided vehicles, and in particular to a telescopic charging control circuit, a system and a charging pile. Background Art

[0002] In recent years, Automated Guided Vehicles (AGVs) have gradually become important equipment for automated parking management. The technology of parking AGV charging devices can make parking AGV charging operations more intelligent. The existing parking AGV charging device can automatically identify the location and power of the parking AGV through the cooperation of sensors and control systems.

[0003] The parking AGV charging device will intelligently adjust the charging power according to the power status of the parking AGV to avoid battery damage and safety accidents caused by overcharging; the technology of the parking AGV charging device can also improve the management level of the parking lot. The system has remote monitoring and data analysis functions, which can grasp the charging status and power changes of the parking AGV in real time, providing important data support for the management and planning of the parking lot.

[0004] The existing charging pile can only fix the charging connector, allowing the parking AGV to actively collide with the copper pole contact position of the charging pile. It is easy to cause damage to the charging pile and the parking AGV due to improper operation by the operator or excessive walking error of the parking AGV, and the charging method lacks flexibility. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a control circuit, system and charging pile for telescopic charging, which can realize automatic telescopic charging and improve charging flexibility.

[0006] On the one hand, the utility model provides a control circuit for telescopic charging, including a switch control circuit, a power circuit, a telescopic circuit, a telescopic charging interface, a manual charging circuit and a manual charging interface;

[0007] The switch control circuit is connected to the manual charging circuit;

[0008] The power supply circuit is respectively connected to the manual charging circuit, the telescopic circuit, the telescopic charging interface and the manual charging interface;

[0009] The telescopic circuit includes a motor, an extension circuit and a retraction circuit. The motor is connected to the telescopic charging interface, the extension circuit and the retraction circuit. The extension circuit and the retraction circuit are both connected to the switch control circuit.

[0010] Optionally, the switch control circuit includes an air switch and a DC power supply;

[0011] One end of the air switch is connected to an external power supply, the other end of the air switch is connected to one end of the DC power supply, and the other end of the DC power supply is connected to the manual charging circuit, the extension circuit and the retraction circuit.

[0012] Optionally, the power supply circuit includes a first contactor, a second contactor, a charger and a cooling fan;

[0013] One end of the coil of the first contactor and one end of the coil of the second contactor are both connected to the switch control circuit; the other end of the coil of the first contactor is connected to the extension circuit, and the other end of the coil of the first contactor and the other end of the coil of the second contactor are both connected to the manual charging circuit;

[0014] The normally open contact of the first contactor is connected to one end of the charger and the cooling fan;

[0015] The other end of the charger is connected to one end of the normally open contact of the second contactor, one end of the normally closed contact of the second contactor, the first stage of the telescopic charging interface, and the first stage of the manual charging interface;

[0016] The other end of the normally closed contact of the second contactor is connected to the second level of the telescopic charging interface, and the other end of the normally open contact of the second contactor is connected to the second level of the manual charging interface.

[0017] Optionally, the manual charging circuit includes a manual charging button;

[0018] The first normally open contact of the manual charging button is connected to the other end of the coil of the first contactor;

[0019] The second normally open contact of the manual charging button is connected to the other end of the coil of the second contactor.

[0020] Optionally, the extension circuit includes a beam switch, an extension-to-position travel switch and a first relay;

[0021] The positive pole of the opposing beam switch and the common end of the opposing beam switch are both connected to the negative pole of the switch control circuit, the negative pole of the opposing beam switch is connected to the positive pole of the switch control circuit, and the normally closed contact of the opposing beam switch is connected to the normally closed contact of the extended-in-position travel switch;

[0022] The normally closed contact of the extended-in-position travel switch is connected to one end of the coil of the first relay, and the other end of the coil of the first relay is connected to the positive electrode of the switch control circuit;

[0023] One end of the normally open contact of the extended-to-position travel switch is connected to the positive electrode of the switch control circuit, and the other end of the normally open contact of the extended-to-position travel switch is connected to the power supply circuit.

[0024] Optionally, the retraction circuit includes a retraction-to-position travel switch and a second relay;

[0025] The normally open contact of the shooting switch is connected to the normally closed contact of the retracted travel switch;

[0026] The normally closed contact of the retracted travel switch is connected to one end of the coil of the second relay, and the other end of the coil of the second relay is connected to the switch control circuit.

[0027] Optionally, the first relay includes a first normally open contact pair and a first normally closed contact pair, and the second relay includes a second normally open contact pair and a second normally closed contact pair;

[0028] One end of the first normally open contact pair is connected to the switch control circuit, the other end of the first normally open contact pair is connected to one end of the second normally closed contact pair, and the other end of the second normally closed contact pair is connected to the motor;

[0029] One end of the second normally open contact pair is connected to the switch control circuit, the other end of the second normally open contact pair is connected to one end of the first normally closed contact pair, and the other end of the first normally closed contact pair is connected to the motor.

[0030] Optionally, the control circuit further includes a safety protection circuit, and the safety protection circuit includes a voltage detection circuit, a current detection circuit, a temperature detection circuit and an interruption circuit;

[0031] The voltage detection circuit, the current detection circuit and the temperature detection circuit are all connected to the power supply circuit;

[0032] The voltage detection circuit, the current detection circuit and the temperature detection circuit are all connected to the interruption circuit, and the interruption circuit is connected to the power supply circuit.

[0033] On the other hand, the utility model provides a telescopic charging pile, the charging pile comprising a charging pile body, a telescopic device and the control circuit described above;

[0034] The telescopic device is installed on the charging pile body, the switch control circuit, the power circuit and the telescopic circuit are arranged inside the charging pile body, the telescopic device carries the telescopic charging interface, and the telescopic device is connected to the motor;

[0035] A manual charging interface and a manual charging circuit are installed on the charging pile body.

[0036] On the other hand, the utility model provides a telescopic charging control system, the control system comprising the aforementioned charging pile and a host computer; the charging pile is communicatively connected with the host computer.

[0037] The implementation of the utility model includes the following beneficial effects: the utility model sets a switch control circuit, a power supply circuit, a telescopic circuit, a telescopic charging interface, a manual charging circuit and a manual charging interface, the switch control circuit is connected to the manual charging circuit, the power supply circuit is respectively connected to the manual charging circuit, the telescopic circuit, the telescopic charging interface and the manual charging interface, the telescopic circuit includes a motor, an extension circuit and a retraction circuit, the motor is connected to the telescopic charging interface, the extension circuit and the retraction circuit, the extension circuit and the retraction circuit are both connected to the switch control circuit, the telescopic circuit can control the motor to realize the extension and retraction of the telescopic charging interface, thereby realizing automatic telescopic charging, and by setting two methods of manual charging and automatic charging, when the automatic charging mode fails, manual charging can be used to improve the charging flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of a control circuit module for telescopic charging provided by the utility model;

[0039] Figure 2 The utility model provides a control circuit wiring diagram of telescopic charging.

[0040] Figure 2 Among them, S-AC220V municipal power supply; QF-air switch; PS-DC power supply; KM-first contactor; KA-second contactor; SW1-extended limit switch; SW2-retracted limit switch; KA1-first relay; KA2-second relay; M-motor; A1-plug; A2-first level of telescopic charging interface (charging pile copper grade); A3-second level of telescopic charging interface; A4-first level of telescopic charging interface (plug-in); A5-second level of telescopic charging interface; A6-cooling fan; N-neutral wire; L-live wire; PE-ground wire. DETAILED DESCRIPTION

[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0042] like Figure 1 As shown, Figure 1 It is a schematic diagram of a control circuit module for telescopic charging. In some embodiments, the utility model provides a control circuit for telescopic charging, including a switch control circuit, a power supply circuit, a telescopic circuit, a telescopic charging interface, a manual charging circuit and a manual charging interface;

[0043] The switch control circuit is connected to the manual charging circuit;

[0044] The power supply circuit is respectively connected to the manual charging circuit, the telescopic circuit, the telescopic charging interface and the manual charging interface;

[0045] The telescopic circuit includes a motor, an extension circuit and a retraction circuit. The motor is connected to the telescopic charging interface, the extension circuit and the retraction circuit. The extension circuit and the retraction circuit are both connected to the switch control circuit.

[0046] In some embodiments, Figure 2 As shown, Figure 2 It is a control circuit wiring diagram of telescopic charging, the dotted box 10 represents the switch control circuit, the dotted box 20 represents the power circuit, the dotted box 30 represents the telescopic circuit, A2 and A3 constitute the telescopic charging interface, A4 and A5 constitute the manual charging connector, SB constitutes the manual charging circuit, and the switch control circuit includes an air switch and a DC power supply;

[0047] One end of the air switch is connected to an external power supply, the other end of the air switch is connected to one end of the DC power supply, and the other end of the DC power supply is connected to the manual charging circuit, the extension circuit and the retraction circuit.

[0048] Specifically, the air switch QF includes but is not limited to two switch contacts, the external power supply is 220V AC power, the R end of the DC power supply PS is connected to one phase of the external power supply through one of the switch contacts, and the L end of the DC power supply PS is connected to the other phase of the external power supply through the other switch contact. In an optional connection method, the connecting line between the air switch QF and the DC power supply PS can be a 0.5mm 2 wire or copper.

[0049] The positive pole of the DC power supply is connected to the manual charging circuit.

[0050] In some embodiments, the power circuit includes a first contactor, a second contactor, a charger, and a cooling fan;

[0051] One end of the coil of the first contactor and one end of the coil of the second contactor are both connected to the switch control circuit; the other end of the coil of the first contactor is connected to the extension circuit, and the other end of the coil of the first contactor and the other end of the coil of the second contactor are both connected to the manual charging circuit;

[0052] The normally open contact of the first contactor is connected to one end of the charger and the cooling fan;

[0053] The other end of the charger is connected to one end of the normally open contact of the second contactor, one end of the normally closed contact of the second contactor, the first stage of the telescopic charging interface, and the first stage of the manual charging interface;

[0054] The other end of the normally closed contact of the second contactor is connected to the second level of the telescopic charging interface, and the other end of the normally open contact of the second contactor is connected to the second level of the manual charging interface.

[0055] Specifically, the charger can provide an AC voltage of 220 V and a DC voltage of 48 V. One end of the coil of the first contactor and one end of the coil of the second contactor are both connected to the negative electrode of the switch control circuit.

[0056] The first contactor includes but is not limited to two normally open contacts, one normally open contact is connected to the R terminal of the charger, and the other normally open contact is connected to the L terminal of the charger.

[0057] The other end of the charger includes but is not limited to two ports, the second contactor includes but is not limited to a double-throw contact, and one port is connected to the copper level of the telescopic charging interface and the first level of the manual charging interface.

[0058] Another port is connected to one end of a double-throw contact, the other end of the double-throw contact includes a normally closed contact and a normally open contact of a second contactor, the normally closed contact of the second contactor is connected to the second level of the telescopic charging interface, and the other end of the normally open contact of the second contactor is connected to the second level of the manual charging interface.

[0059] The first contactor and the second contactor are both DC contactors.

[0060] In some embodiments, the manual charging circuit includes a manual charging button;

[0061] The first normally open contact of the manual charging button is connected to the other end of the coil of the first contactor;

[0062] The second normally open contact of the manual charging button is connected to the other end of the coil of the second contactor.

[0063] Specifically, the first normally open contact of the manual charging button and the second normally open contact of the manual charging button are both connected to the positive electrode of the DC power supply.

[0064] In an optional connection mode, the connecting line between the first contactor and the DC power supply PS can be a cross-sectional area of ​​0.5mm 2 Wire or copper

[0065] Specifically, the manual charging current may also include a button or a switch.

[0066] In some embodiments,

[0067] In some embodiments, the extension circuit includes a beam switch, an extension-to-position limit switch, and a first relay;

[0068] The positive pole of the opposing beam switch and the common end of the opposing beam switch are both connected to the negative pole of the switch control circuit, the negative pole of the opposing beam switch is connected to the positive pole of the switch control circuit, and the normally closed contact of the opposing beam switch is connected to the normally closed contact of the extended-in-position travel switch;

[0069] The normally closed contact of the extended-in-position travel switch is connected to one end of the coil of the first relay, and the other end of the coil of the first relay is connected to the positive electrode of the switch control circuit;

[0070] One end of the normally open contact of the extended-to-position travel switch is connected to the positive electrode of the switch control circuit, and the other end of the normally open contact of the extended-to-position travel switch is connected to the power supply circuit.

[0071] In some embodiments, the retraction circuit includes a retracted travel switch and a second relay;

[0072] The normally open contact of the shooting switch is connected to the normally closed contact of the retracted travel switch;

[0073] The normally closed contact of the retracted travel switch is connected to one end of the coil of the second relay, and the other end of the coil of the second relay is connected to the switch control circuit.

[0074] In some embodiments, the first relay includes a first normally open contact pair and a first normally closed contact pair, and the second relay includes a second normally open contact pair and a second normally closed contact pair;

[0075] One end of the first normally open contact pair is connected to the switch control circuit, the other end of the first normally open contact pair is connected to one end of the second normally closed contact pair, and the other end of the second normally closed contact pair is connected to the motor;

[0076] One end of the second normally open contact pair is connected to the switch control circuit, the other end of the second normally open contact pair is connected to one end of the first normally closed contact pair, and the other end of the first normally closed contact pair is connected to the motor.

[0077] Specifically, the first normally open contact pair includes normally open contact 1 and normally open contact 2, the first normally closed contact pair includes normally closed contact 3 and normally closed contact 4, the second normally open contact pair includes normally open contact 5 and normally open contact 6, and the second normally closed contact pair includes normally closed contact 7 and normally closed contact 8.

[0078] One end of the normally open contact 1 is connected to the positive pole of the DC power supply, the other end of the normally open contact 1 is connected to one end of the normally closed contact 7, and the other end of the normally closed contact 7 is connected to the negative pole of the motor M; one end of the normally open contact 2 is connected to the negative pole of the DC power supply, the other end of the normally open contact 2 is connected to one end of the normally closed contact 8, and the other end of the normally closed contact 8 is connected to the positive pole of the motor M.

[0079] One end of the normally open contact 5 is connected to the negative pole of the DC power supply, and the other end of the normally open contact 5 is connected to one end of the normally closed contact 3, and the other end of the normally closed contact 3 is connected to the negative pole of the motor M; one end of the normally open contact 6 is connected to the positive pole of the DC power supply, and the other end of the normally open contact 6 is connected to one end of the normally closed contact 4, and the other end of the normally closed contact 4 is connected to the positive pole of the motor M.

[0080] In some embodiments, the control circuit further includes a safety protection circuit, and the safety protection circuit includes a voltage detection circuit, a current detection circuit, a temperature detection circuit and an interrupt circuit;

[0081] The voltage detection circuit, the current detection circuit and the temperature detection circuit are all connected to the power supply circuit;

[0082] The voltage detection circuit, the current detection circuit and the temperature detection circuit are all connected to the interruption circuit, and the interruption circuit is connected to the power supply circuit.

[0083] Specifically, the voltage detection circuit, the current detection circuit and the temperature detection circuit are all connected to the charger, and the interruption circuit is connected to the charger of the power supply circuit.

[0084] In some embodiments, the utility model provides a telescopic charging pile, the charging pile comprising a charging pile body, a telescopic device and the control circuit described above;

[0085] The telescopic device is installed on the charging pile body, the switch control circuit, the power circuit and the telescopic circuit are arranged inside the charging pile body, the telescopic device carries the telescopic charging interface, and the telescopic device is connected to the motor;

[0086] A manual charging interface and a manual charging circuit are installed on the charging pile body.

[0087] In some embodiments, the utility model provides a telescopic charging control system, the control system comprising the aforementioned charging pile and a host computer; the charging pile is communicatively connected with the host computer.

[0088] Specifically, the working process of the utility model is as follows:

[0089] Automatic extension charging: First, the charging pile is connected to the 220V mains electricity, the air switch (QF) is turned on, and the charging pile has a built-in AGV charger of matching model. The AGV charger and the charging pile cooling fan are controlled by the DC contactor (KM) to supply 220V power. When the system detects that the parking AGV power is lower than the set charging threshold, the parking AGV will automatically run to the charging pile parking space. After the parking AGV is in place, it sends a charging command, the transmitting end of the rear-mounted shooting switch of the parking AGV is turned on, and the receiving end of the shooting switch of the AGV charging pile receives the infrared signal from the transmitting end. The normally closed contact (NC) inside the shooting switch is closed, and the DC power supply (PS) provides 12V DC power. The current flows from the shooting switch NC through the normally closed contact of the extended in place travel switch (SW1), and then to the coil of the first relay (KA1). After the coil of the first relay (KA1) is energized, the normally open contact of the first relay (KA1) is closed, the forward current is conducted, and the push rod motor (M) extends out of the telescopic charging interface.

[0090] The telescopic charging interface contacts the charging electrode connector of the parking AGV, the normally closed contact of the extended-in-place travel switch (SW1) is disconnected, and the push rod motor stops extending. At the same time, the normally open contact of the extended-in-place travel switch (SW1) is closed, the coil of the first contactor (KM) is turned on, the AGV charger and the cooling fan are turned on, and the power output end of the AGV charger is connected to the automatic charging electrode of the telescopic charging interface through the normally closed contact of the second contactor (KA) to achieve the automatic charging function.

[0091] Stop automatic charging and retract the telescopic charging interface: When the parking AGV's power reaches the required power value or the parking AGV needs to be urgently transferred, the parking AGV's system sends a stop charging command, the parking AGV's tail shooting switch transmitter is closed, and the normally open contact (NO) of the AGV charging pile shooting switch receiving end is closed. The power supply (PS) provides a 12V DC power supply, and the current flows from the normally open contact (NO) of the shooting switch through the normally closed contact of the retracted position travel switch (SW2) and then to the coil of the second relay (KA2). The normally open contact of the second relay (KA2) is closed, and the reverse current is turned on. The push rod motor (M) retracts the telescopic charging interface, and the normally closed contact of the retracted position travel switch (SW2) is disconnected. The push rod motor stops retracting, and the normally open contact of the extended position travel switch (SW1) is disconnected. The coil of the first contactor (KM) is powered off, and the AGV charger and cooling fan stop running.

[0092] Manual charging process: The AGV charging pile and the parking AGV both have spare charging plugs. When manual charging is required, plug the manual charging plug of the charging pile into the spare plug of the parking AGV, press the manual charging button (SB), the normally open contact of the button is closed, the coils of the first contactor (KM) and the second contactor (KA) are both turned on, the AGV charger and cooling fan are turned on, and the normally open contact of the second contactor (KA) is closed for charging the manual charging connector.

[0093] The implementation of this utility model includes the following beneficial effects:

[0094] The telescopic circuit can control the motor to extend and retract the telescopic charging interface, thereby realizing automatic telescopic charging. By setting two methods, manual charging and automatic charging, manual charging can be used when the automatic charging method fails, thereby improving the flexibility of charging.

[0095] By having the first relay include a first normally open contact pair and a first normally closed contact pair, the second relay include a second normally open contact pair and a second normally closed contact pair, the first normally open contact pair and the second normally closed contact pair are connected in series, and the second normally open contact pair and the second normally open contact pair are connected in series, the switching of the forward current and the reverse current of the motor can be controlled, thereby realizing automatic extension and retraction of the retractable charging interface, without the need to add a PLC controller to output pulses to control the first relay and the second relay to realize automatic extension and retraction.

[0096] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A telescopic charging control circuit, characterized in that: It includes a switch control circuit, a power supply circuit, a telescopic circuit, a telescopic charging interface, a manual charging circuit and a manual charging interface; The switch control circuit is connected to the manual charging circuit; The power supply circuit is respectively connected to the manual charging circuit, the telescopic circuit, the telescopic charging interface and the manual charging interface; The telescopic circuit includes a motor, an extension circuit and a retraction circuit. The motor is connected to the telescopic charging interface, the extension circuit and the retraction circuit. The extension circuit and the retraction circuit are both connected to the switch control circuit.

2. The control circuit according to claim 1, characterized in that: The switch control circuit includes an air switch and a DC power supply; One end of the air switch is connected to an external power supply, the other end of the air switch is connected to one end of the DC power supply, and the other end of the DC power supply is connected to the manual charging circuit, the extension circuit and the retraction circuit.

3. The control circuit according to claim 1, characterized in that: The power supply circuit includes a first contactor, a second contactor, a charger and a cooling fan; One end of the coil of the first contactor and one end of the coil of the second contactor are both connected to the switch control circuit; the other end of the coil of the first contactor is connected to the extension circuit, and the other end of the coil of the first contactor and the other end of the coil of the second contactor are both connected to the manual charging circuit; The normally open contact of the first contactor is connected to one end of the charger and the cooling fan; The other end of the charger is connected to one end of the normally open contact of the second contactor, one end of the normally closed contact of the second contactor, the first stage of the telescopic charging interface, and the first stage of the manual charging interface; The other end of the normally closed contact of the second contactor is connected to the second level of the telescopic charging interface, and the other end of the normally open contact of the second contactor is connected to the second level of the manual charging interface.

4. The control circuit according to claim 3, characterized in that: The manual charging circuit includes a manual charging button; The first normally open contact of the manual charging button is connected to the other end of the coil of the first contactor; The second normally open contact of the manual charging button is connected to the other end of the coil of the second contactor.

5. The control circuit according to claim 1, characterized in that: The extension circuit includes a beam switch, an extension-to-position travel switch and a first relay; The positive pole of the opposing beam switch and the common end of the opposing beam switch are both connected to the negative pole of the switch control circuit, the negative pole of the opposing beam switch is connected to the positive pole of the switch control circuit, and the normally closed contact of the opposing beam switch is connected to the normally closed contact of the extended-in-position travel switch; The normally closed contact of the extended-in-position travel switch is connected to one end of the coil of the first relay, and the other end of the coil of the first relay is connected to the positive electrode of the switch control circuit; One end of the normally open contact of the extended-to-position travel switch is connected to the positive electrode of the switch control circuit, and the other end of the normally open contact of the extended-to-position travel switch is connected to the power supply circuit.

6. The control circuit according to claim 5, characterized in that: The retracting circuit includes a retracting travel switch and a second relay; The normally open contact of the shooting switch is connected to the normally closed contact of the retracted travel switch; The normally closed contact of the retracted travel switch is connected to one end of the coil of the second relay, and the other end of the coil of the second relay is connected to the switch control circuit.

7. The control circuit according to claim 6, characterized in that: The first relay includes a first normally open contact pair and a first normally closed contact pair, and the second relay includes a second normally open contact pair and a second normally closed contact pair; One end of the first normally open contact pair is connected to the switch control circuit, the other end of the first normally open contact pair is connected to one end of the second normally closed contact pair, and the other end of the second normally closed contact pair is connected to the motor; One end of the second normally open contact pair is connected to the switch control circuit, the other end of the second normally open contact pair is connected to one end of the first normally closed contact pair, and the other end of the first normally closed contact pair is connected to the motor.

8. The control circuit according to any one of claims 1 to 7, characterized in that: The control circuit also includes a safety protection circuit, which includes a voltage detection circuit, a current detection circuit, a temperature detection circuit and an interruption circuit; The voltage detection circuit, the current detection circuit and the temperature detection circuit are all connected to the power supply circuit; The voltage detection circuit, the current detection circuit and the temperature detection circuit are all connected to the interruption circuit, and the interruption circuit is connected to the power supply circuit.

9. A telescopic charging pile, characterized in that: The charging pile comprises a charging pile body, a telescopic device and a control circuit according to any one of claims 1 to 8; The telescopic device is installed on the charging pile body, the switch control circuit, the power circuit and the telescopic circuit are arranged inside the charging pile body, the telescopic device carries the telescopic charging interface, and the telescopic device is connected to the motor; A manual charging interface and a manual charging circuit are installed on the charging pile body.

10. A telescopic charging control system, characterized in that: The control system comprises the charging pile and a host computer as claimed in claim 9; the charging pile is communicatively connected with the host computer.