Electronic lock detection circuit and electronic lock detection device
By designing an electronic lock detection circuit and utilizing the delayed disconnection function of relays and control units, rapid fault diagnosis of electronic locks and feedback switches for charging guns and charging bases of new energy vehicles is achieved, solving the problem of difficult fault diagnosis in existing technologies and improving maintenance efficiency.
Patent Information
- Application Number
- CN202511363403.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-23
- Publication Date
- 2025-11-21
AI Technical Summary
The lack of dedicated equipment in the current technology for troubleshooting the electronic locks and electronic lock feedback switches on the DC charging guns and AC charging bases of new energy vehicles leads to wasted time and parts during the maintenance process, and increases the difficulty of vehicle off-line maintenance and charging pile maintenance.
An electronic lock detection circuit was designed, including a power supply, first and second detection branches, a relay, a control unit, and a button. By controlling the delayed disconnection of the relay and the use of the locking feedback light, fault detection of the electronic lock and the electronic lock feedback switch can be achieved.
It simplifies troubleshooting of electronic locks and electronic lock feedback switches, enabling quick identification of the source of the fault and reducing unnecessary waste during the maintenance process.
Smart Images
Figure CN120993094A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of electronic lock detection, and in particular, relates to an electronic lock detection circuit and an electronic lock detection device. BACKGROUND
[0002] New energy vehicle direct current charging guns and vehicle alternating current charging sockets are designed with electronic locks. Through the electronic locks, load break and accidental disconnection of the charging interface can be prevented, and the charging interface can be prevented from reaching the condition of starting power transmission when not correctly plugged in. Occasionally, the electronic lock on the direct current charging gun or the vehicle alternating current charging socket will malfunction during use. After the electronic lock malfunctions, it needs to be checked whether the device connected with the electronic lock malfunctions or the electronic lock or the electronic lock feedback switch malfunctions. At present, there is no special detection equipment for the detection of the electronic lock. If the electronic lock malfunctions, the troubleshooting can only be carried out by replacing the parts during maintenance, which causes unnecessary waste of maintenance time and parts and brings great difficulty to vehicle off-line maintenance, after-sales maintenance and charging pile charging gun maintenance. SUMMARY
[0003] The present application aims to provide an electronic lock detection circuit and an electronic lock detection device to overcome the problem that it is inconvenient to troubleshoot the electronic lock and the electronic lock feedback switch on the direct current charging gun or the vehicle alternating current charging socket in the prior art.
[0004] The present application is implemented by adopting the following technical scheme. An electronic lock detection circuit comprises a power supply, a first detection branch powered by the power supply and a second detection branch powered by the power supply. The first detection branch comprises a first wire segment connected with the positive pole of the power supply and a second wire segment connected with the negative pole of the power supply. The end of the first wire segment is connected with a first probe, and the head of the second wire segment is connected with a second probe. A latching feedback lamp is further connected in series on the first detection branch. The second detection branch comprises a third wire segment and a fourth wire segment connected with the positive pole of the power supply respectively, and a fifth wire segment and a sixth wire segment connected with the negative pole of the power supply respectively. The ends of the third wire segment and the fourth wire segment are connected with the first static contact of a first relay and the first static contact of a second relay respectively. The heads of the fifth wire segment and the sixth wire segment are connected with the second static contact of the first relay and the second static contact of the second relay respectively. The common dynamic contact of the first relay is connected with a third probe through a wire, and the common dynamic contact of the second relay is connected with a fourth probe through a wire.
[0005] Further, a control unit is further included. The control unit is used to control the first relay to be powered and to lose power after a first delay time, and to control the second relay to be powered and to lose power after a second delay time.
[0006] Further, the control unit is connected with the first button and the second button respectively; the control unit controls the first relay to be powered in response to a trigger signal of the first button; the control unit controls the second relay to be powered in response to a trigger signal of the second button.
[0007] Further, the control unit comprises a control board powered by the power supply, the control board comprising a microcontroller unit; the coil of the first relay is connected to the microcontroller unit through a first driving circuit, and the coil of the second relay is connected to the microcontroller unit through a second driving circuit; the input port of the microcontroller unit is connected with the first button and the second button; the microcontroller unit adopts a single-chip microcomputer.
[0008] Further, the first delay time is T1, wherein 0.3s≤T1≤1s; the second delay time is T2, wherein 0.3s≤T2≤1s.
[0009] Further, a total power switch is further included, which is connected in series in the power supply circuit of the power supply; a power indicator powered by the power supply is further included.
[0010] Further, a charging management module is further included, the input end of the charging management module is used for connecting an external power supply, the output end of the charging management module is connected to the power supply, and the charging management module is used for charging the power supply; the power supply is a rechargeable battery.
[0011] Further, the first relay and the second relay are both single-pole double-throw electromagnetic relays; the first static contact of the first relay is a normally closed contact, the second static contact of the first relay is a normally open contact, the first static contact of the second relay is a normally closed contact, and the second static contact of the second relay is a normally open contact.
[0012] An electronic lock detection device further comprises the electronic lock detection circuit, the electronic lock detection circuit is installed in the shell, and the first pen, the second pen, the third pen and the fourth pen are respectively led out of the shell through wires.
[0013] Further, the surface of the shell is provided with the first button, the second button, the total power switch, the power indicator and the lock feedback lamp, and the surface of the shell is further provided with the charging interface.
[0014] Compared with the prior art, the electronic lock detection device has the following beneficial effects: The electronic lock detection device is convenient for troubleshooting the electronic lock and the electronic lock feedback switch to determine whether the electronic lock and the electronic lock feedback switch have faults. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 is a schematic diagram of the electronic lock detection circuit of the present application; Figure 2 is a schematic diagram of the electronic lock detection device of the present application.
[0016] In the figure: 1, power supply; 2, first wire segment; 3, second wire segment; 4, first pen; 5, second pen; 6, lock feedback light; 7, third wire segment; 8, fourth wire segment; 9, fifth wire segment; 10, sixth wire segment; 11, first relay; 12, second relay; 13, third pen; 14, fourth pen; 15, control board; 16, first button; 17, second button; 18, main power switch; 19, charge management module; 20, outer shell; 21, electronic lock; 22, electronic lock feedback switch; 23, power indicator light. DETAILED DESCRIPTION
[0017] In order for those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. All other embodiments obtained by those skilled in the art on the basis of the embodiments in the present application without creative labor shall belong to the scope of protection of the present application.
[0018] An electronic lock detection circuit, as shown in Figure 1 includes a power supply 1, which is a rechargeable battery; further includes a charge management module 19, the input end of the charge management module 19 is used for connecting an external power supply, and its output end is connected to the power supply 1 for charging the power supply 1, and the charge management module 19 is integrated with a charging interface. The charge management module 19 is used for charging the power supply 1, and the charging interface is a common charging interface in the prior art, such as a Type-C interface and the like.
[0019] The electronic lock detection circuit further includes a first detection branch powered by the power supply 1 and a second detection branch powered by the power supply 1.
[0020] The first detection branch includes a first wire segment 2 connected to the positive electrode of the power supply 1 and a second wire segment 3 connected to the negative electrode of the power supply 1, the end of the first wire segment 2 is connected to a first pen 4, and the beginning of the second wire segment 3 is connected to a second pen 5, and a lock feedback light 6 is further connected in series on the first detection branch, and the lock feedback light 6 is connected in series on the second wire segment 3.
[0021] The first detection branch is used for detecting the fault of the electronic lock feedback switch 22, and the first pen 4 and the second pen 5 form a detection interface.
[0022] The second detection branch comprises a third wire segment 7 and a fourth wire segment 8 connected with the positive pole of the power supply 1 respectively, and the second detection branch further comprises a fifth wire segment 9 and a sixth wire segment 10 connected with the negative pole of the power supply 1 respectively, the tail end of the third wire segment 7 and the tail end of the fourth wire segment 8 are connected with the first static contact of the first relay 11 and the first static contact of the second relay 12 respectively, the head end of the fifth wire segment 9 and the head end of the sixth wire segment 10 are connected with the second static contact of the first relay 11 and the second static contact of the second relay 12 respectively, and the common moving contact of the first relay 11 is connected with the third pen 13 through a wire, and the common moving contact of the second relay 12 is connected with the fourth pen 14 through a wire.
[0023] The second detection branch is used for detecting the fault of the electronic lock 21, and the third pen 13 and the fourth pen 14 form a detection interface.
[0024] The first relay 11 and the second relay 12 are single-pole double-throw electromagnetic relays, the coil of the first relay 11 and the coil of the second relay 12 are powered by the power supply 1, the first static contact of the first relay 11 is a normally closed contact, the second static contact of the first relay 11 is a normally open contact, the first static contact of the second relay 12 is a normally closed contact, and the second static contact of the second relay 12 is a normally open contact.
[0025] When the first relay 11 and the second relay 12 are not powered, the first static contact of the first relay 11 is connected with the common moving contact of the first relay 11, and the first static contact of the second relay 12 is connected with the common moving contact of the second relay 12, at this time, the third pen 13 and the fourth pen 14 are connected with the positive pole of the power supply 1, when the third pen 13 and the fourth pen 14 are connected with the positive pole and the negative pole of the motor of the electronic lock 21 respectively, the second detection branch is still open circuit.
[0026] In the case that the third and fourth table pens 13 and 14 are connected to the positive and negative poles of the driving motor of the electronic lock 21 respectively, the coil of the second relay 12 is electrified, the second static contact of the second relay 12 is connected to the common moving contact of the second relay 12, and the first static contact of the second relay 12 is disconnected from the common moving contact of the second relay 12, at this time, the fourth table pen 14 is connected to the negative pole of the power supply 1 through the sixth wire segment 10, and the third table pen 13 is connected to the positive pole of the power supply 1 through the third wire segment 7, at this time, the second detection branch forms a path, and the driving motor of the electronic lock 21 is electrified and rotates in the positive direction.
[0027] In the case that the third and fourth table pens 13 and 14 are connected to the positive and negative poles of the driving motor of the electronic lock 21 respectively, the coil of the second relay 12 is electrified, the second static contact of the second relay 12 is connected to the common moving contact of the second relay 12, and the first static contact of the second relay 12 is disconnected from the common moving contact of the second relay 12, at this time, the fourth table pen 14 is connected to the negative pole of the power supply 1 through the sixth wire segment 10, and the third table pen 13 is connected to the positive pole of the power supply 1 through the third wire segment 7, at this time, the second detection branch forms a path, and the driving motor of the electronic lock 21 is electrified and rotates in the positive direction.
[0028] The electronic lock detection circuit further comprises a control unit, which can realize the time-delayed disconnection of the first relay 11 and the second relay 12, and the control unit is used for controlling the electrification of the first relay 11 and the de-electrification of the first relay 11 after a first time delay, and is used for controlling the electrification of the second relay 12 and the de-electrification of the second relay 12 after a second time delay.
[0029] The control unit comprises a control board 15 powered by the power supply 1, the control board 15 comprises a microcontroller unit, the coil of the first relay 11 is connected to the microcontroller unit through a first driving circuit, and the coil of the second relay 12 is connected to the microcontroller unit through a second driving circuit, and the microcontroller unit adopts a single-chip microcomputer.
[0030] In the present application, the first relay 11 and the second relay 12 realize time-delayed disconnection through the control board 15, the control board 15 is a circuit board with integrated functions, and a single-chip microcomputer as a control core and a first driving circuit for driving the first relay and a second driving circuit for driving the second relay are installed on the control board 15, and the single-chip microcomputer is connected to the first driving circuit and the second driving circuit through control signals respectively. The single-chip microcomputer is programmed to realize the time-delayed disconnection of the first relay and the time-delayed disconnection of the second relay, for example, which can be realized through an internal timer or a software time delay function. The control board 15 is powered by the power supply 1, the power supply pin of the control board 15 is connected to the positive pole of the power supply 1, and the grounding pin of the control board 15 is connected to the negative pole of the power supply 1, so as to form a power supply loop of the control board 15.
[0031] One end of the first relay 11 coil is connected to the positive pole of the power supply 1, and the other end is connected to the first drive circuit and connected to the negative pole of the power supply 1 through the first drive circuit to form a power supply loop of the first relay 11 coil. The first drive circuit is implemented by an NPN transistor, the collector of the NPN transistor is connected to the first relay 11 coil, the emitter of the NPN transistor is connected to the negative pole of the power supply 1, and the base of the NPN transistor is connected to the first control signal port of the single-chip microcomputer through a base current limiting resistor. The first drive circuit is used to turn on or cut off the connection between the first relay 11 coil and the negative pole of the power supply according to the control signal sent by the first control signal port of the single-chip microcomputer.
[0032] One end of the second relay 12 coil is connected to the positive pole of the power supply 1, and the other end is connected to the second drive circuit and connected to the negative pole of the power supply 1 through the second drive circuit to form a power supply loop of the second relay 12 coil. The second drive circuit is also implemented by an NPN transistor, the collector of the NPN transistor is connected to the second relay 12 coil, the emitter of the NPN transistor is connected to the negative pole of the power supply 1, and the base of the NPN transistor is connected to the second control signal port of the single-chip microcomputer through a base current limiting resistor. The second drive circuit is used to turn on or cut off the connection between the second relay 12 coil and the negative pole of the power supply according to the control signal sent by the second control signal port of the single-chip microcomputer.
[0033] The control unit is connected to the first button 16 and the second button 17 respectively; the control unit controls the power supply of the first relay 11 in response to the trigger signal of the first button 16; the control unit controls the power supply of the second relay 12 in response to the trigger signal of the second button 17. Specifically, the input port of the single-chip microcomputer is connected to the first button 16 and the second button 17 through the control panel 15. The first button 16 and the second button 17 are both self-resetting buttons.
[0034] When the first button 16 is pressed, a first trigger signal is triggered on the single-chip microcomputer, and the single-chip microcomputer sends a high-level control signal to the first driving circuit through the first control signal port in response to the first trigger signal, so that the first driving circuit is turned on, and then the coil of the first relay 11 is connected with the negative pole of the power supply 1, so that the coil of the first relay 11 is electrified. After a predetermined first delay time, the single-chip microcomputer stops sending the high-level control signal to the first driving circuit, so that the first driving circuit is turned off, and then the coil of the first relay 11 is disconnected with the negative pole of the power supply 1, so that the coil of the first relay 11 is de-energized. When the second button 17 is pressed, a second trigger signal is triggered on the single-chip microcomputer, and the single-chip microcomputer sends a high-level control signal to the second driving circuit through the second control signal port in response to the second trigger signal, so that the second driving circuit is turned on, and then the coil of the second relay 12 is connected with the negative pole of the power supply 1, so that the coil of the second relay 12 is electrified. After a predetermined second delay time, the single-chip microcomputer stops sending the high-level control signal to the second driving circuit, so that the second driving circuit is turned off, and then the coil of the second relay 12 is disconnected with the negative pole of the power supply 1, so that the coil of the second relay 12 is de-energized.
[0035] The first delay time is T1, where 0.3s≤T1≤1s; and the second delay time is T2, where 0.3s≤T2≤1s.
[0036] The total power switch 18 is further included, which is connected in series in the power supply circuit of the power supply 1, as shown in the accompanying drawings. Figure 1 The total power switch 18 can control the on-off of the entire power supply circuit. The power indicator lamp 23 powered by the power supply is further included, one end of the power indicator lamp 23 is connected with the positive pole of the power supply, and the other end of the power indicator lamp 23 is connected with the negative pole of the power supply. When the total power switch 18 is closed, the power indicator lamp 23 is electrified and lit up, and when the total power switch 18 is disconnected, the power indicator lamp 23 is de-energized and extinguished.
[0037] An electronic lock detection device, comprising a shell 20, further comprising the above-mentioned electronic lock detection circuit, the electronic lock detection circuit is installed in the shell 20, and the first probe 4, the second probe 5, the third probe 13 and the fourth probe 14 are respectively led out of the shell 20 through wires.
[0038] The surface of the shell 20 is provided with the first button 16, the second button 17, the total power switch 18, the power indicator lamp 23 and the lock feedback lamp 6, and the surface of the shell 20 is further provided with a charging interface.
[0039] The first button 16 and the second button 17 can be used as an unlocking button and a locking button respectively. In the prior art, during the normal use of the charging gun or the charging seat, the electronic lock feedback switch 22 can be automatically closed or opened according to the locking or unlocking of the electronic lock 21. When the electronic lock 21 is locked, the electronic lock feedback switch 22 can be automatically closed. When the electronic lock 21 is unlocked, the electronic lock feedback switch 22 can be automatically opened. When the electronic lock feedback switch 22 cannot be automatically opened or closed according to the locking or unlocking of the electronic lock 21, it can be determined that the electronic lock feedback switch 22 is faulty.
[0040] The working process of the present application is as follows: When it is necessary to check whether the electronic lock 21 and the electronic lock feedback switch 22 are faulty, the third table pen 13 and the fourth table pen 14 are connected to the positive and negative poles of the driving motor of the electronic lock 21 respectively, and the first table pen 4 and the second table pen 5 are connected to the positive and negative poles of the electronic lock feedback switch 22 respectively.
[0041] Then the main power switch 18 is turned on, and the power indicator light 23 is lit. At this time, it is checked whether the locking feedback light 6 is lit. If the locking feedback light 6 is lit, it means that the electronic lock feedback switch 22 is in a closed state. If the locking feedback light 6 is not lit, it means that the electronic lock feedback switch 22 is in an open state.
[0042] When the locking feedback light 6 is not lit: First, the second button 17, i.e. the locking button, is pressed. When the second button 17 is pressed, a second trigger signal on the single-chip microcomputer is triggered. The single-chip microcomputer responds to the second trigger signal and sends a high-level control signal to the second driving circuit through the second control signal port, so that the second driving circuit is turned on, and then the second relay 12 coil is connected to the negative pole of the power supply 1, so that the second relay 12 coil is powered on. The single-chip microcomputer stops sending the high-level control signal to the second driving circuit after a predetermined second delay time, so that the second driving circuit is turned off, and then the second relay 12 coil is disconnected from the negative pole of the power supply 1, so that the second relay 12 coil is powered off. When the second relay 12 coil is powered on, the second static contact of the second relay 12 and the common moving contact of the second relay 12 are connected. At this time, the fourth table pen 14 is connected to the negative pole of the power supply 1 through the sixth lead segment 10, and the third table pen 13 is connected to the positive pole of the power supply 1 through the third lead segment 7. At this time, the second detection branch forms a path, the driving motor of the electronic lock 21 is powered on and rotates in a positive direction. At this time, it is checked whether the electronic lock 21 is in action. If the electronic lock 21 is not in action, it can be initially determined that the electronic lock 21 is faulty. If the electronic lock 21 is in action and the locking feedback light 6 is not lit, it can be initially determined that the electronic lock feedback switch 22 is faulty. Then press the first button 16, that is, the unlocking button, when the first button 16 is pressed, a first trigger signal on the single-chip microcomputer is triggered, the single-chip microcomputer sends a high-level control signal to the first drive circuit through the first control signal port in response to the first trigger signal, so that the first drive circuit is turned on, and then the first relay 11 coil is connected with the negative pole of the power supply 1, so that the first relay 11 coil is powered on, and the single-chip microcomputer stops sending a high-level control signal to the first drive circuit after a predetermined first delay time, so that the first drive circuit is turned off, and then the first relay 11 coil is disconnected with the negative pole of the power supply 1, so that the first relay 11 coil is powered off; the first relay 11 coil is powered on to connect the second static contact of the first relay 11 and the common moving contact of the first relay 11, at this time the third table pen 13 is connected with the negative pole of the power supply 1 through the fifth wire segment 9, and the fourth table pen 14 is connected with the positive pole of the power supply 1 through the fourth wire segment 8, at this time the second detection branch forms a path, the drive motor of the electronic lock 21 is powered on and reverses, at this time whether the electronic lock 21 has action is checked, if there is no action, it can be determined that the electronic lock 21 is faulty, if there is action and the locking feedback lamp 6 is not lit, it can be determined that the electronic lock feedback switch 22 is faulty.
[0043] When the locking feedback lamp 6 is lit: First, press the first button 16, that is, the unlocking button, the drive motor of the electronic lock 21 is powered on and reverses, at this time whether the electronic lock 21 has action is checked, if there is no action, it can be initially determined that the electronic lock 21 is faulty, if there is action and the locking feedback lamp 6 is not extinguished, it can be initially determined that the electronic lock feedback switch 22 is faulty; Then press the second button 17, that is, the locking button, the drive motor of the electronic lock 21 is powered on and rotates forward, and whether the electronic lock 21 has action is checked again, if there is no action, it can be determined that the electronic lock 21 is faulty, if there is action and the locking feedback lamp 6 is not extinguished, it can be determined that the electronic lock feedback switch 22 is faulty.
Claims
1. An electronic lock detection circuit, characterized by, It comprises a power supply (1), and a first detection branch powered by the power supply (1) and a second detection branch powered by the power supply (1); The first detection branch comprises a first wire segment (2) connected to the positive pole of the power supply (1) and a second wire segment (3) connected to the negative pole of the power supply (1), the end of the first wire segment (2) is connected to a first probe (4), and the head of the second wire segment (3) is connected to a second probe (5), and a latching feedback lamp (6) is further connected in series on the first detection branch; The second detection branch comprises a third wire segment (7) and a fourth wire segment (8) connected to the positive pole of the power supply (1) respectively, and a fifth wire segment (9) and a sixth wire segment (10) connected to the negative pole of the power supply (1) respectively, the end of the third wire segment (7) and the end of the fourth wire segment (8) are connected to the first static contact of the first relay (11) and the first static contact of the second relay (12) respectively, the head of the fifth wire segment (9) and the head of the sixth wire segment (10) are connected to the second static contact of the first relay (11) and the second static contact of the second relay (12) respectively, and the common dynamic contact of the first relay (11) is connected to a third probe (13) through a wire, and the common dynamic contact of the second relay (12) is connected to a fourth probe (14) through a wire.
2. The electronic lock detection circuit of claim 1, wherein, It further comprises a control unit, which is used to control the first relay (11) to be powered and de-energized after a first delay time, and to control the second relay (12) to be powered and de-energized after a second delay time.
3. The electronic lock detection circuit of claim 2, wherein, The control unit is connected to a first button (16) and a second button (17) respectively; the control unit controls the first relay (11) to be powered in response to the trigger signal of the first button (16); the control unit controls the second relay (12) to be powered in response to the trigger signal of the second button (17).
4. The electronic lock detection circuit of claim 3, wherein, The control unit comprises a control board (15) powered by the power supply (1), the control board (15) comprises a microcontroller unit; the coil of the first relay (11) is connected to the microcontroller unit through a first drive circuit, and the coil of the second relay (12) is connected to the microcontroller unit through a second drive circuit; the input port of the microcontroller unit is connected to the first button (16) and the second button (17); the microcontroller unit adopts a single-chip microcomputer.
5. The electronic lock detection circuit of claim 2, wherein, The first delay time is T1, wherein 0.3s≤T1≤1s; the second delay time is T2, wherein 0.3s≤T2≤1s.
6. The electronic lock detection circuit of claim 1, wherein, It further comprises a total power switch (18) connected in series in the power supply circuit of the power supply (1); and a power indicator (23) powered by the power supply.
7. The electronic lock detection circuit of claim 1, wherein, It further comprises a charging management module (19), the input end of the charging management module (19) is used to connect an external power supply, and the output end is connected to the power supply (1) for charging the power supply (1), and the charging management module (19) is integrated with a charging interface; the power supply (1) is a rechargeable battery.
8. The electronic lock detection circuit of claim 1, wherein, The first relay (11) and the second relay (12) are single-pole double-throw electromagnetic relays; the first stationary contact of the first relay (11) is a normally closed contact, the second stationary contact of the first relay (11) is a normally open contact, the first stationary contact of the second relay (12) is a normally closed contact, and the second stationary contact of the second relay (12) is a normally open contact.
9. An electronic lock detection apparatus comprising an outer housing (20), characterised in that, The electronic lock detection circuit of any one of claims 1-8 is installed in the outer shell (20), and the first probe (4), the second probe (5), the third probe (13), and the fourth probe (14) are respectively led out of the outer shell (20) through wires.
10. The electronic lock detection apparatus of claim 9, wherein, The surface of the outer shell (20) is provided with a first button (16), a second button (17), a total power switch (18), a power indicator lamp (23), and a lock feedback lamp (6), and the surface of the outer shell (20) is further provided with a charging interface.