Charging connector locking device and charging connector system

Abstract

The utility model relates to a charging connector locking device and a charging connector system, including: an electronic lock for locking and unlocking the plug and socket of the charging connector; a travel sensor, which is arranged on the electronic lock to detect the travel signal of the electronic lock; a state detection module, which is used to generate a state detection signal based on the locking state signal of the electronic lock and the travel signal; a control module, which is used to generate a locking signal or an unlocking signal based on a vehicle power-on signal and the state detection signal; and an electromechanical interlocking drive module, which is used to control the locking of the electronic lock based on the locking signal or to control the unlocking of the electronic lock based on the unlocking signal. The utility model can control the unlocking and interlocking of the electronic lock based on the vehicle power-on signal and the states fed back by the travel sensor and the electronic lock, thereby realizing effective locking of the connector, preventing the operator from accidentally unplugging the charging connector and possibly causing a risk of electric shock, and ensuring that the charging connector can be effectively unplugged when the vehicle is powered off.

Description

Technical Field

[0001] The utility model relates to the field of charging connectors, and more specifically, to a charging connector locking device and a charging connector system. Background Art

[0002] The flameproof power charging connector for mining is mainly used in coal mines and in environments with explosive gas mixtures such as coal dust and methane. It is used as a connection device between power cables and flameproof electrical switchgear. At present, the common flameproof power charging connectors for mining on the market only use simple mechanical locking structures such as bolts or buckles when charging mining equipment. Such a design has the following problems. 1. The plug and socket of the connector are very easy to disengage, and the reliability and anti-drop performance of the connector are insufficient; 2. When the vehicle is powered on, the operator may accidentally unplug the charging connector, which may cause electric shock; 3. When the vehicle is powered off, the charging connector cannot be effectively unplugged. Utility Model Content

[0003] The technical problem to be solved by the present utility model is that, in view of the above-mentioned defects of the prior art, a charging connector locking device and a charging connector system are provided, which can control the unlocking and interlocking of the electronic lock based on the vehicle power-on signal and the status of the travel sensor and the electronic lock feedback, thereby achieving effective locking of the connector, preventing the operator from accidentally unplugging the charging connector and possibly causing electric shock, and ensuring that the charging connector can be effectively unplugged when the vehicle is powered off.

[0004] The technical solution adopted by the utility model to solve the technical problem is: construct a charging connector locking device, including:

[0005] An electronic lock, used to lock the plug and the socket of the charging connector when locked, and unlock the plug and the socket of the charging connector when unlocked;

[0006] A travel sensor, arranged on the electronic lock to detect a travel signal of the electronic lock;

[0007] A state detection module, used for generating a state detection signal based on the locking state signal of the electronic lock and the travel signal;

[0008] A control module, configured to generate a locking signal or an unlocking signal based on a vehicle power-on signal and the state detection signal;

[0009] an electromechanical interlocking drive module, configured to control the electronic lock to be locked based on the locking signal or to control the electronic lock to be unlocked based on the unlocking signal;

[0010] The electronic lock is powered on by the lock control signal to complete locking and maintain self-locking, and is unlocked and maintained unlocked based on the unlock signal.

[0011] In the charging connector locking device described in the utility model, the state detection module includes a first optocoupler and a second optocoupler; the anode of the transmitting end of the first optocoupler is connected to the first working voltage, the cathode of the transmitting end is connected to the first state feedback end of the electronic lock to receive the locking state signal, the emitter of the receiving end outputs the first state detection signal, and the collector of the receiving end is connected to the second working voltage; the anode of the transmitting end of the second optocoupler is connected to the first working voltage, the cathode of the transmitting end is connected to the first state feedback end of the stroke sensor to receive the stroke signal, the emitter of the receiving end outputs the second state detection signal, and the collector of the receiving end is connected to the second working voltage; the second state feedback end of the electronic lock and the second state feedback end of the stroke sensor are both grounded.

[0012] In the charging connector locking device described in the utility model, the state detection module further includes a first resistor, a first LED, a second resistor, a third resistor, a second LED and a fourth resistor; the first resistor and the first LED are connected in series between the first working voltage and the anode of the transmitting end of the first optocoupler, and the second resistor is connected between the collector of the receiving end of the first optocoupler and the second working voltage; the third resistor and the second LED are connected in series between the first working voltage and the anode of the transmitting end of the second optocoupler, and the fourth resistor is connected between the collector of the receiving end of the second optocoupler and the second working voltage.

[0013] In the charging connector locking device described in the utility model, the control module is used to generate the vehicle power-on signal based on the power-on status of the electric vehicle, and to generate the locking signal, the unlocking signal or the error signal based on the vehicle power-on signal, the first status detection signal and the second status detection signal.

[0014] In the charging connector locking device described in the utility model, the electromechanical interlocking drive module includes a first switch tube, a second switch tube, a DC / DC converter and a relay switch;

[0015] The control end of the first switch tube receives the locking signal or the unlocking signal, the first end is connected to the third working voltage, the second end is connected to the positive input electrode of the DC / DC converter, and the negative input electrode of the DC / DC converter is grounded;

[0016] The output positive pole of the DC / DC converter is respectively connected to the positive static contact of the first switch and the positive static contact of the second switch of the relay switch, and the output negative pole is respectively connected to the negative static contact of the first switch and the negative static contact of the second switch of the relay switch; the moving contact of the first switch is connected to the positive pole of the electronic lock, and the moving contact of the second switch is connected to the negative pole of the electronic lock;

[0017] The control end of the second switch tube receives the unlocking signal, the first end is connected to the third working voltage, and the second end is connected to the anode of the coil of the relay switch; the cathode of the relay switch is grounded;

[0018] When the electromechanical interlocking drive module receives the locking signal, it controls the first switch tube to be turned on so as to control the electronic lock to be locked and closed;

[0019] When the electromechanical interlocking drive module receives the unlocking signal, it first controls the second switch tube to be turned on, then controls the first switch tube to be turned on, then controls the first switch tube to be turned off, and then controls the second switch tube to be turned off to unlock the electronic lock.

[0020] In the charging connector locking device of the utility model, the electromechanical interlocking drive module further includes a third optical coupler and a fourth optical coupler;

[0021] The anode of the transmitting end of the third optical coupler is connected to the second working voltage, the cathode of the transmitting end is connected to the control module, the emitter of the receiving end is grounded, and the collector of the receiving end is connected to the control end of the first switch tube;

[0022] The anode of the transmitting end of the fourth optical coupler is connected to the second working voltage, the cathode of the transmitting end is connected to the control module, the emitter of the receiving end is grounded, and the collector of the receiving end is connected to the control end of the second switch tube.

[0023] In the charging connector locking device described in the utility model, the electromechanical interlocking drive module further includes a first fuse and a second fuse, the first fuse is connected between the first end of the first switch tube and the third operating voltage; the second fuse is connected between the first end of the second switch tube and the third operating voltage.

[0024] In the charging connector locking device of the utility model, the electromechanical interlocking drive module further includes a seventh resistor, a third LED, an eighth resistor and a fourth LED;

[0025] The seventh resistor and the third LED are connected in series between the first end of the first switch tube and the third operating voltage;

[0026] The eighth resistor and the fourth LED are connected in series between the first end of the second switch tube and the third operating voltage.

[0027] In the charging connector locking device of the utility model, the electromechanical interlocking drive module further includes a ninth resistor, a tenth resistor, an eleventh resistor and a twelfth resistor;

[0028] The ninth resistor is connected between the cathode of the transmitting end of the third optocoupler and the second operating voltage; the tenth resistor is connected between the cathode of the transmitting end of the fourth optocoupler and the second operating voltage; the eleventh resistor is connected between the collector of the receiving end of the third optocoupler and the third operating voltage; the twelfth resistor is connected between the collector of the receiving end of the fourth optocoupler and the third operating voltage.

[0029] Another technical solution adopted by the present invention to solve its technical problem is to construct a charging connector system, including a plug and a socket and any one of the above-mentioned charging connector locking devices.

[0030] The charging connector locking device and charging connector system of the utility model can control the unlocking and interlocking of the electronic lock based on the vehicle power-on signal and the status of the travel sensor and the electronic lock feedback, thereby achieving effective locking of the connector, preventing the operator from accidentally unplugging the charging connector, which may cause electric shock, and ensuring that the charging connector can be effectively unplugged when the vehicle is powered off. Furthermore, the circuit design of each module of the charging connector locking device is exquisite and the structure is simple. On the basis of ensuring the precise control of the electronic lock, common electronic devices are used, so the circuit cost is low and easy to construct. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0032] Figure 1 It is a principle block diagram of the charging connector locking device of the utility model;

[0033] Figure 2 It is a circuit diagram of a state detection module of the charging connector locking device of the utility model;

[0034] Figure 3 It is a circuit diagram of the electronic lock, travel sensor and electromechanical interlocking drive module of the charging connector locking device of the utility model;

[0035] Figure 4A It is a circuit flow diagram of the state detection module of the charging connector locking device of the utility model during the power-on locking process;

[0036] Figure 4B It is a circuit flow diagram of the state detection module of the charging connector locking device of the utility model during the power-off unlocking process;

[0037] Figure 5A It is a circuit flow diagram of the electromechanical interlocking drive module of the charging connector locking device of the utility model during the power-on locking process;

[0038] Figure 5BIt is a circuit flow diagram of the electromechanical interlocking drive module of the charging connector locking device of the utility model during the power-off unlocking process. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0040] The charging connector locking device of the utility model is suitable for electric vehicles, especially the charging connector of explosion-proof electric vehicles for mining. The charging connector includes a plug assembled on the charger side or the vehicle side through a cable and a socket assembled on the equipment side and plugged with the plug, and the socket and the plug are locked and unlocked by a locking member. The locking member is pushed out and retracted by an electronic lock to unlock and lock the socket and the plug, so that the electromechanical interlocking of the socket and the plug can be achieved.

[0041] Figure 1 This is a functional block diagram of the charging connector locking device of the utility model. Figure 1 As shown, the charging connector locking device of the utility model includes an electronic lock 100, a stroke sensor 200, a state detection module 300, a control module 400 and an electromechanical interlocking drive module 500. The electronic lock 100 is used to lock the plug and the socket of the charging connector when locked, and unlock the plug and the socket of the charging connector when unlocked. Here, the electronic lock 100 can adopt any suitable electronic lock structure, which preferably includes an electronic switch and a locking member. Before locking, the plug and the socket of the charging connector move to the mechanical coupling position, and the locking member moves to the mechanical locking position, and then under the control of the electronic switch, the locking member moves to the electronic locking position to complete the locking of the plug and the socket. When unlocking is required, under the control of the electronic switch, the locking member moves to the electronic unlocking position, at which time the locking member can be manually moved to the mechanical unlocking position, and then the mechanical coupling of the plug and the socket is released to complete the unlocking. Here, the locking member can adopt any suitable device, such as a swing arm, a locking rod matching groove, and two mutually meshing members, etc., which all fall within the protection scope of the utility model. Those skilled in the art know that electronic locks in the prior art are usually configured to lock and remain locked after receiving a lock signal, and to unlock and remain unlocked after receiving an unlock signal. Here, the electronic lock 100 can be any electronic lock known in the art, and its principle is well known to those skilled in the art, and will not be described here.

[0042] The travel sensor 200 is arranged on the electronic lock 100 to detect the travel signal of the electronic lock 100. The travel sensor 200 can be any known travel sensor 200 in the prior art, which can be installed at an appropriate position of the electronic lock 100 according to actual conditions, preferably installed on the locking member, to determine whether the locking member moves to a suitable position. In a preferred embodiment of the utility model, the locking member is a swing arm, so in this preferred embodiment, the travel sensor 200 is arranged on the swing arm to detect whether the swing arm is in place, and then send a travel signal according to the detection result.

[0043] The state detection module 300 is used to generate a state detection signal based on the lock state signal of the electronic lock 100 and the travel signal. The state detection module 300 may adopt any suitable circuit, module or chip to receive the lock state signal of the electronic lock 100 from the electronic lock 100 and the travel signal from the travel sensor 200. For example, the state detection module 300 may include at least two optical couplers to receive the lock state signal from both ends of the electronic lock 100 and the travel signal from the receiving end of the travel sensor 200, and then generate a first state detection signal and a second state detection signal respectively and output them.

[0044] The control module 400 is used to generate a lock signal or an unlock signal based on the vehicle power-on signal and the state detection signal. The control module 400 can be any suitable control chip, which can receive the vehicle power-on signal from the vehicle control system or through a dedicated receiving port, so as to determine whether the vehicle is in a high-voltage power-on state or a low-voltage state. The control module 400 generates a lock signal or an unlock signal for controlling the electronic lock to lock or unlock based on the vehicle power-on signal and the state detection signal.

[0045] The electromechanical interlocking drive module 500 is used to control the electronic lock 100 to lock based on the locking signal or to control the electronic lock 100 to unlock based on the unlocking signal. The electronic lock is powered on based on the locking control signal to complete locking and maintain self-locking, and is unlocked and maintained unlocked based on the unlocking signal. Specifically, when the electromechanical interlocking drive module 500 controls the electronic lock 100 to lock based on the locking signal, the electronic lock 100 is powered on in the forward direction, and the electronic lock 100 controls the push-out of the locking member to lock the socket and the plug, and then the electronic lock 100 loses power, and at this time the electronic lock 100 remains in the self-locking position. When the electromechanical interlocking drive module 500 controls the electronic lock 100 to unlock based on the unlocking signal, the electronic lock 100 is powered on in the reverse direction, and at this time the electronic lock 100 controls the retraction of the locking member to unlock the socket and the plug, and then the electronic lock 100 loses power, and at this time the electronic lock 100 remains in the unlocked position. Here, the electromechanical interlocking drive module 500 can be constructed using any suitable circuit.

[0046] The charging connector locking device and charging connector system of the utility model can control the unlocking and interlocking of the electronic lock based on the vehicle power-on signal and the status of the travel sensor and the electronic lock feedback, thereby achieving effective locking of the connector, preventing the operator from accidentally unplugging the charging connector and causing the risk of electric shock, and ensuring that the charging connector can be effectively unplugged when the vehicle is powered off.

[0047] Figure 2 It is a circuit diagram of a state detection module of the charging connector locking device of the utility model. Figure 3 The circuit diagram of the electronic lock, travel sensor and electromechanical interlocking drive module of the charging connector locking device of the utility model is known to those skilled in the art. Figure 2-3 A circuit diagram of a preferred embodiment of the charging connector locking device of the utility model is shown. In other preferred embodiments of the utility model, other modules, chips or units may also be used to implement the charging connector locking device of the utility model, all of which fall within the protection scope of the utility model.

[0048] like Figure 2As shown, the state detection module 300 includes an optical coupler U3, an optical coupler U4, a resistor R17, an LED3, resistors R15, R18, LED4 and R16. The anode of the transmitting end of the optical coupler U3 is connected to the +3.3V working voltage through the resistor R17 and LED3, the cathode of the transmitting end is connected to the state feedback end K1 of the electronic lock 100 to receive the locking state signal, the emitter of the receiving end outputs the first state detection signal through the resistor R15, and the collector of the receiving end is connected to the +5V working voltage. The anode of the transmitting end of the optical coupler U4 is connected to the +3.3V working voltage through the resistor R18 and LED4, the cathode of the transmitting end is connected to the state feedback end K3 of the travel sensor 200 to receive the travel signal, the emitter of the receiving end outputs the second state detection signal through the resistor R16, and the collector of the receiving end is connected to the +5V working voltage; the state feedback end K2 of the electronic lock 100 and the state feedback end K4 of the travel sensor 200 are both grounded.

[0049] Of course, in other preferred embodiments of the present invention, corresponding electronic components can be added or reduced, such as resistor R17, LED3, resistors R15, R18, LED4 and R16 can be omitted, so that the anode of the transmitting end of the optical coupler U3 is directly connected to the +3.3V working voltage, and the receiving end emitter directly outputs the first state detection signal. The anode of the transmitting end of the optical coupler U4 is directly connected to the +3.3V working voltage, and the receiving end emitter directly outputs the second state detection signal.

[0050] like Figure 3 As shown, the electronic lock 100 is a normally open switch, which outputs the locking state signal when the lock is closed. The travel sensor 200 also maintains a normally open state, and outputs the travel signal when the electronic lock (or the locking member of the electronic lock) is in the locking position. Of course, it can also be understood that the electronic lock 100 outputs a first locking state signal (valid signal) when the lock is closed, and outputs a second locking state signal (invalid signal) at other times. The travel sensor 200 also maintains a normally open state, and outputs a first travel signal (valid signal) when the electronic lock (or the locking member of the electronic lock) is in the locking position, and outputs a second travel signal (invalid signal) when it is in the unlocking position. The locking state signal is input into the state detection module 300 via the state feedback terminal K1 and the state feedback terminal K2. The travel signal is input into the state detection module 300 via the state feedback terminal K3 and the state feedback terminal K4.

[0051] The control module 400 may be, for example, a control chip, wherein the first input terminal PE10 receives the first state detection signal from the receiving end emitter of the first optical coupler U3, the second input terminal PE11 receives the second state detection signal from the receiving end emitter of the second optical coupler U4, receives the vehicle power-on signal from the vehicle control system or through a dedicated receiving port, and generates the locking signal, the unlocking signal or the error signal based on the vehicle power-on signal, the first state detection signal and the second state detection signal. The first output terminal PE1 of the control module 400 outputs the locking signal, and the first output terminal PE1 and the second output terminal PE2 of the control module 400 output the unlocking signal.

[0052] like Figure 3 As shown, the electromechanical interlocking drive module 500 includes an optical coupler U3, an optical coupler U4, a resistor R13, an LED 1, a resistor R14, an LED 2, a resistor R1, a resistor R2, a resistor R11 and a resistor R12, a switch tube Q1, a switch tube Q2, a DC / DC converter and a relay switch KM1. Figure 3As shown, the anode of the transmitting end of the optical coupler U3 is connected to the +3.3V working voltage through the resistor R1, the cathode of the transmitting end is connected to the first output end PE1 of the control module 400, the emitter of the receiving end is grounded, and the collector of the receiving end is connected to the control end of the switch tube Q1; the control end of the switch tube Q1 receives the locking signal or the unlocking signal from the first output end PE1 of the control module 400 through the optical coupler U3. The fuse FS1 is connected between the first end of the switch tube Q1 and the +24V working voltage. The resistor R13 and the LED 1 are also connected in series between the first end of the switch tube Q1 and the +24V working voltage. The second end of the switch tube Q1 is connected to the positive input of the DC / DC converter, and the negative input of the DC / DC converter is grounded. The anode of the transmitting end of the optical coupler U4 is connected to the +3.3V working voltage through the resistor R2, the cathode of the transmitting end is connected to the second output end PE2 of the control module 400 to receive the unlocking signal, the emitter of the receiving end is grounded, and the collector of the receiving end is connected to the control end of the switch tube Q2. The control end of the switch tube Q2 receives the unlocking signal from the second output end PE2 of the control module 400 through the optical coupler U4. The fuse FS2 is connected between the first end of the switch tube Q2 and the +24V working voltage. The resistor R14 and the LED 2 are connected in series between the first end of the switch tube Q2 and the +24V working voltage. The second end of the switch tube Q2 is connected to the anode of the coil of the relay switch KM1; the cathode of the relay switch KM1 is grounded. The output positive pole of the DC / DC converter is respectively connected to the positive static contact 1 of the first switch of the relay switch KM1 and the positive static contact 5 of the second switch, and the output negative pole is respectively connected to the negative static contact 4 of the first switch of the relay switch KM1 and the negative static contact 2 of the second switch; the moving contact 7 of the first switch is connected to the positive pole of the electronic lock 100, and the fixed end of the moving contact 8 of the second switch is connected to the negative pole of the electronic lock 100. The resistor R11 is connected between the collector of the receiving end of the optocoupler U3 and the +24V operating voltage; the resistor R12 is connected between the collector of the receiving end of the optocoupler U4 and the +24V operating voltage.

[0053] Of course, in a simplified embodiment of the present utility model, the optical coupler U3, optical coupler U4, resistor R13, LED 1, resistor R14, LED 2, resistor R1, resistor R2, resistor R11 and resistor R12 can be omitted according to actual needs. For example, the control end of the switch tube Q1 can directly receive the locking signal or the unlocking signal, the first end is connected to the third working voltage, the second end is connected to the positive input of the DC / DC converter, and the negative input of the DC / DC converter is grounded. The control end of the switch tube Q2 directly receives the unlocking signal, the first end is connected to the third working voltage, and the second end is connected to the anode of the coil of the relay switch; the cathode of the relay switch is grounded.

[0054] In a preferred embodiment of the utility model, when the electromechanical interlocking drive module 500 receives the locking signal, it controls the switch tube Q1 to be turned on, thereby controlling the electronic lock 100 to be energized in the forward direction to be closed and locked, and then the electronic lock 100 loses power, at which time the electronic lock maintains the locked position by itself; when receiving the unlocking signal, it first controls the switch tube Q2 to be turned on, then controls the switch tube Q1 to be turned on, and then controls the switch tube Q1 to be turned off, and then controls the switch tube Q2 to be turned off, thereby realizing the safe power-off unlocking of the electronic lock 100, that is, the electronic lock 100 is energized in the reverse direction to be unlocked, and then the electronic lock loses power to maintain the unlocked position.

[0055] Figure 4A It is a circuit flow diagram of the state detection module of the charging connector locking device of the utility model during the power-on locking process. Figure 4B It is a circuit flow diagram of the state detection module of the charging connector locking device of the utility model during the power-off unlocking process. Figure 5A It is a circuit flow diagram of the electromechanical interlocking drive module of the charging connector locking device of the utility model during the power-on locking process. Figure 5B It is a circuit flow diagram of the electromechanical interlocking drive module of the charging connector locking device of the utility model during the power-off unlocking process.

[0056] The following will be combined Figure 2-5B The specific principle of the charging connector locking device of the utility model is described as follows. First, before the electric vehicle is powered on and before locking, the plug and the socket of the charging connector move to the mechanical coupling position, and the locking piece moves to the mechanical locking position. At this time, the electric measurement is powered on in any suitable manner, for example, a card swipe can be used to power on. At this time, after the travel sensor 200 is locked, it is determined whether the locking piece has moved to a suitable position. If so, a travel signal is output, otherwise a fault signal is output. The travel signal is preferably a low-level valid signal. If Figure 4AAs shown, at this time, the optocoupler U4 is turned on, and the receiving end emitter of the second optocoupler U4 generates the second state detection signal. The control module 400 generates a lock signal based on the second state detection signal and the vehicle power-on signal, and outputs the lock signal from the first output terminal PE1. The lock signal is a low-level effective signal. At this time, Figure 5A As shown, the switch tube Q1 is turned on. The DC / DC converter is powered, and a 12V voltage is output between its positive output and negative output. Since the normally closed ends of the first switch and the second switch of the relay switch KM1 are respectively connected to the positive output and negative output of the DC / DC converter, the electronic lock 100 is locked, and the plug and socket are locked. At this time, the electronic lock 100 inputs the locking state signal to the state detection module 300 through the state feedback terminal K1 and the state feedback terminal K2, as shown in FIG. Figure 4A As shown. The locking state signal is also valid at a low level. At this time, the optocoupler U3 is turned on and outputs a first state detection signal. At this time, it means that the charging connector has been locked and the power supply device can be controlled to complete high-voltage power-on. If the electronic lock does not input the locking state signal to the state detection module 300 through the state feedback terminal K1 and the state feedback terminal K2 at this time, or the locking state signal is an invalid signal, the entire process is terminated and a fault is reported.

[0057] In the power-off process, when the high voltage is detected to be completed, the unlocking process is entered. If the high voltage fails, the process is terminated and the fault is reported. The high voltage process can be implemented by any existing solution, such as by swiping a card. Of course, other solutions can also be used to implement it.

[0058] First, determine whether the electronic lock 100 is in a locked state. If so, a locked state signal is output at this time. The locked state signal is also valid at a low level. At this time, the optical coupler U3 is turned on and outputs a first state detection signal. Then the travel sensor 200 determines whether the locking element is in a suitable position. If so, a travel signal is output, otherwise a fault signal is output. The travel signal is preferably a low-level valid signal. Figure 4B As shown, at this time, the optocoupler U4 is turned on, and the receiving end emitter of the second optocoupler U4 generates the second state detection signal. The control module 400 generates an unlock signal based on the first state detection signal, the second state detection signal and the vehicle down signal, and outputs the unlock signal from the first output terminal PE1 and the second output terminal PE2. The unlock signal is a low-level effective signal, and it can be used to control the switch tubes Q1 and Q2 respectively.

[0059] like Figure 5BAs shown, first, the control module 400 outputs a low level at the second output terminal PE2, so that the switch tube Q2 is turned on. At this time, the relay switch KM1, which is powered off due to the low voltage, is powered on. Then, while the second output terminal PE2 is kept outputting a low level, a low level is output at the first output terminal PE1, so that the switch tube Q1 is turned on. At this time, the DC / DC converter is powered on, and a 12V voltage is output between its output positive and output negative electrodes. Since the normally closed ends of the first switch and the second switch of the relay switch KM1 are respectively connected to the output positive and output negative electrodes of the DC / DC converter, the electronic lock 100 is powered on to achieve the locking of the plug and the socket. After maintaining the set time (for example, 2 seconds), a high level is output at the PE1 end, so that the switch tube Q1 is turned off, the DC / DC converter loses power, and the electronic lock 100 loses power, thereby unlocking. After the electronic lock 100 is unlocked, the no-lock state signal (or no-lock state signal) is input into the state detection module 300 via the state feedback terminal K1 and the state feedback terminal K2, which indicates that the unlocking is successful. If at this time there is still a locking state signal input into the state detection module 300 via the state feedback terminal K1 and the state feedback terminal K2, it means that the unlocking fails and a fault needs to be reported.

[0060] The charging connector locking device of the utility model can control the unlocking and interlocking of the electronic lock based on the vehicle power-on signal and the status of the travel sensor and the electronic lock feedback, thereby effectively locking the connector, preventing the operator from accidentally unplugging the charging connector, which may cause electric shock, and ensuring that the charging connector can be effectively unplugged when the vehicle is powered off. Furthermore, the circuit design of each module of the charging connector locking device is exquisite and the structure is simple. On the basis of ensuring the precise control of the electronic lock, common electronic devices are used, so the circuit cost is low and easy to construct.

[0061] A further preferred embodiment of the present invention also relates to a charging connector system, which includes a plug and a socket and any one of the above-mentioned charging connector locking devices. Based on the teachings of the present invention, those skilled in the art can construct such a charging connector system, which will not be described here.

[0062] Although the present invention is described through specific embodiments, it should be understood by those skilled in the art that various changes and equivalent substitutions may be made to the present invention without departing from the scope of the present invention. In addition, various modifications may be made to the present invention for specific situations or materials without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed, but should include all implementation methods that fall within the scope of the claims of the present invention.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A charging connector locking device, characterized in that: include: Electronic locks for locking and unlocking the plug and socket of the charging connector; A travel sensor, arranged on the electronic lock to detect a travel signal of the electronic lock; A state detection module, used for generating a state detection signal based on the locking state signal of the electronic lock and the travel signal; A control module, configured to generate a locking signal or an unlocking signal based on a vehicle power-on signal and the state detection signal; an electromechanical interlocking drive module, configured to control the electronic lock to be locked based on the locking signal or to control the electronic lock to be unlocked based on the unlocking signal; The electronic lock is locked and remains locked based on the lock signal, and is unlocked and remains unlocked based on the unlock signal.

2. The charging connector locking device according to claim 1, characterized in that: The state detection module includes a first optocoupler and a second optocoupler; the anode of the transmitting end of the first optocoupler is connected to the first working voltage, the cathode of the transmitting end is connected to the first state feedback end of the electronic lock to receive the locking state signal, the emitter of the receiving end outputs the first state detection signal, and the collector of the receiving end is connected to the second working voltage; the anode of the transmitting end of the second optocoupler is connected to the first working voltage, the cathode of the transmitting end is connected to the first state feedback end of the travel sensor to receive the travel signal, the emitter of the receiving end outputs the second state detection signal, and the collector of the receiving end is connected to the second working voltage; the second state feedback end of the electronic lock and the second state feedback end of the travel sensor are both grounded.

3. The charging connector locking device according to claim 2, characterized in that: The state detection module further includes a first resistor, a first LED, a second resistor, a third resistor, a second LED and a fourth resistor; the first resistor and the first LED are connected in series between the first operating voltage and the anode of the transmitting end of the first optocoupler, and the second resistor is connected between the collector of the receiving end of the first optocoupler and the second operating voltage; the third resistor and the second LED are connected in series between the first operating voltage and the anode of the transmitting end of the second optocoupler, and the fourth resistor is connected between the collector of the receiving end of the second optocoupler and the second operating voltage.

4. The charging connector locking device according to claim 2, characterized in that: The control module is used to generate the vehicle power-on signal based on the power-on state of the electric vehicle, and to generate the locking signal, the unlocking signal or the error signal based on the vehicle power-on signal, the first state detection signal and the second state detection signal.

5. The charging connector locking device according to claim 4, characterized in that: The electromechanical interlocking drive module includes a first switch tube, a second switch tube, a DC / DC converter and a relay switch; The control end of the first switch tube receives the locking signal or the unlocking signal, the first end is connected to the third working voltage, the second end is connected to the positive input electrode of the DC / DC converter, and the negative input electrode of the DC / DC converter is grounded; The output positive pole of the DC / DC converter is respectively connected to the positive static contact of the first switch and the positive static contact of the second switch of the relay switch, and the output negative pole is respectively connected to the negative static contact of the first switch and the negative static contact of the second switch of the relay switch; the moving contact of the first switch is connected to the positive pole of the electronic lock, and the moving contact of the second switch is connected to the negative pole of the electronic lock; The control end of the second switch tube receives the unlocking signal, the first end is connected to the third working voltage, and the second end is connected to the anode of the coil of the relay switch; the cathode of the relay switch is grounded; When the electromechanical interlocking drive module receives the locking signal, it controls the first switch tube to be turned on so as to control the electronic lock to be locked and closed; When the electromechanical interlocking drive module receives the unlocking signal, it first controls the second switch tube to be turned on, then controls the first switch tube to be turned on, then controls the first switch tube to be turned off, and then controls the second switch tube to be turned off to unlock the electronic lock.

6. The charging connector locking device according to claim 5, characterized in that: The electromechanical interlocking drive module further includes a third optical coupler and a fourth optical coupler; The anode of the transmitting end of the third optical coupler is connected to the second working voltage, the cathode of the transmitting end is connected to the control module, the emitter of the receiving end is grounded, and the collector of the receiving end is connected to the control end of the first switch tube; The anode of the transmitting end of the fourth optical coupler is connected to the second working voltage, the cathode of the transmitting end is connected to the control module, the emitter of the receiving end is grounded, and the collector of the receiving end is connected to the control end of the second switch tube.

7. The charging connector locking device according to claim 6, characterized in that: The electromechanical interlocking drive module further includes a first fuse and a second fuse, wherein the first fuse is connected between the first end of the first switch tube and the third operating voltage; and the second fuse is connected between the first end of the second switch tube and the third operating voltage.

8. The charging connector locking device according to claim 7, characterized in that: The electromechanical interlocking drive module further includes a seventh resistor, a third LED, an eighth resistor and a fourth LED; The seventh resistor and the third LED are connected in series between the first end of the first switch tube and the third operating voltage; The eighth resistor and the fourth LED are connected in series between the first end of the second switch tube and the third operating voltage.

9. The charging connector locking device according to claim 8, characterized in that: The electromechanical interlocking drive module further includes a ninth resistor, a tenth resistor, an eleventh resistor and a twelfth resistor; The ninth resistor is connected between the cathode of the transmitting end of the third optocoupler and the second operating voltage; the tenth resistor is connected between the cathode of the transmitting end of the fourth optocoupler and the second operating voltage; the eleventh resistor is connected between the collector of the receiving end of the third optocoupler and the third operating voltage; the twelfth resistor is connected between the collector of the receiving end of the fourth optocoupler and the third operating voltage.

10. A charging connector system, characterized in that: The invention comprises a plug and a socket and a charging connector locking device according to any one of claims 1 to 9.

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