Charging gun electronic lock control circuit and charging device

Abstract

The utility model discloses a charging gun electronic lock control circuit, and relates to the technical field of electronic circuits, the disclosed charging gun electronic lock control circuit is connected with a power supply, and comprises an unlocking module and a locking module which are connected with each other, a control module connected with the unlocking module and the locking module respectively, and an electronic lock connected with the unlocking module and the locking module respectively, and the unlocking module is also connected with the power supply. The technical effect of prolonging the service life of the charging gun is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic circuits, and in particular to a charging gun electronic lock control circuit and a charging device. Background Art

[0002] At present, in order to prevent the charging gun from falling off during high-current charging of electric vehicles and causing accidental electric shock, the charging gun should generally have a locking function when charging electric vehicles. For example, an electronic lock is set on the charging gun to ensure that the charging gun is not unplugged while charging.

[0003] In the related technology, the pulse-type charging gun electronic lock is controlled by a relay, with a high level locking and a low level unlocking. This control method using a relay will keep the relay coil energized for a long time in order to maintain the locked state of the charging gun electronic lock. However, long-term energization of the coil will affect the service life of the relay, causing the charging gun electronic lock to fail, and thus affecting the life of the charging gun. Utility Model Content

[0004] The main purpose of this application is to provide a charging gun electronic lock control circuit, aiming to solve the technical problem in the related art that the relay life of the charging gun is short, which affects the life of the charging gun.

[0005] To achieve the above-mentioned purpose, the present application proposes a charging gun electronic lock control circuit, which is connected to a power supply, and the circuit includes an unlocking module and a locking module connected to each other, a control module connected to the unlocking module and the locking module respectively, and an electronic lock connected to the unlocking module and the locking module respectively, and the unlocking module is also connected to the power supply;

[0006] The control module is used to generate a locking control signal according to a detection signal received from the charging gun that the charging action is being performed, and to generate an unlocking control signal according to a detection signal received from the charging gun that the charging is completed;

[0007] The unlocking module is used to forward the supply voltage provided by the power supply to the locking module, and output the supply voltage provided by the power supply to the electronic lock according to the unlocking control signal;

[0008] The locking module is used to output the power supply voltage forwarded by the unlocking module to the electronic lock according to the locking control signal;

[0009] The electronic lock is used to perform an unlocking action according to the power supply voltage output by the unlocking module or to perform a locking action according to the power supply voltage output by the locking module.

[0010] In one embodiment, the electronic lock includes an unlocking interface and a locking interface, and the unlocking module includes a first relay and a first resistor;

[0011] The coil of the first relay is connected to the circuit of the control module through the first resistor to be energized according to the unlocking control signal;

[0012] The first contact of the first relay and the fourth contact of the first relay are both connected to the locking module, the second contact of the first relay is grounded, the third contact of the first relay is connected to the locking interface, the fifth contact of the first relay is connected to the power supply, and the sixth contact of the first relay is connected to the unlocking interface;

[0013] The first contact of the first relay and the second contact of the first relay are normally closed, the second contact of the first relay and the third contact of the first relay are normally open, the fourth contact of the first relay and the fifth contact of the first relay are normally closed, and the fifth contact of the first relay and the sixth contact of the first relay are normally open;

[0014] When the coil of the first relay is energized, the first contact of the first relay is disconnected from the second contact of the first relay and the second contact of the first relay is closed to the third contact of the first relay, the fourth contact of the first relay is disconnected from the fifth contact of the first relay and the fifth contact of the first relay is closed to the sixth contact of the first relay.

[0015] In one embodiment, the unlocking module further includes a first voltage stabilizing diode;

[0016] The cathode of the first voltage stabilizing diode is respectively connected to one end of the coil of the first relay and one end of the first resistor, and the other end of the first resistor is connected to the control module;

[0017] The anode of the first voltage stabilizing diode is connected to the other end of the coil of the first relay and the control module respectively.

[0018] In one embodiment, the electronic lock includes an unlocking interface and a locking interface, and the locking module includes a second relay and a second resistor;

[0019] The coil of the second relay is connected to the circuit of the control module through the second resistor to be energized according to the locking control signal;

[0020] The second contact and the fifth contact of the second relay are both connected to the unlocking module, the third contact of the second relay is connected to the unlocking interface, and the sixth contact of the second relay is connected to the locking interface;

[0021] The first contact of the second relay and the second contact of the second relay are normally closed, the second contact of the second relay and the third contact of the second relay are normally open, the fourth contact of the second relay and the fifth contact of the second relay are normally closed, and the fifth contact of the second relay and the sixth contact of the second relay are normally open;

[0022] When the coil of the second relay is energized, the first contact of the second relay is disconnected from the second contact of the second relay and the second contact of the second relay is closed with the third contact of the second relay, the fourth contact of the second relay is disconnected from the fifth contact of the second relay and the fifth contact of the second relay is closed with the sixth contact of the second relay.

[0023] In one embodiment, the locking module further includes a second voltage stabilizing diode;

[0024] The cathode of the second voltage stabilizing diode is connected to one end of the coil of the second relay and one end of the second resistor, and the other end of the second resistor is connected to the control module;

[0025] The anode of the second voltage stabilizing diode is connected to the other end of the coil of the second relay and the control module respectively.

[0026] In one embodiment, the control circuit further comprises a power failure detection module connected to the power supply, the unlocking module and the electronic lock respectively;

[0027] The power failure detection module is used to detect the power supply status of the power supply, generate a normal power supply signal or a power supply stop signal, forward the power supply voltage to the unlocking module according to the normal power supply signal or output an emergency voltage according to the power supply stop signal;

[0028] The electronic lock is also used to perform unlocking actions based on the emergency voltage.

[0029] In one embodiment, the power failure detection module includes an energy storage unit and a power failure detection unit connected to each other, the energy storage unit and the power failure detection unit are both connected to a power supply, and the power failure detection unit is also connected to the unlocking module and the electronic lock respectively;

[0030] The power failure detection unit is used to detect the power supply status of the power supply, generate a normal power supply signal or a power supply stop signal, and forward the power supply voltage to the unlocking module according to the normal power supply signal;

[0031] The energy storage unit is used to store the supply voltage according to the normal power supply signal, or output the emergency voltage according to the power supply stop signal;

[0032] The power failure detection unit is further used to forward the emergency voltage to the electronic lock according to the power supply stop signal, so that the electronic lock performs an unlocking action according to the emergency voltage.

[0033] In one embodiment, the energy storage unit includes an energy storage capacitor, a diode and a third resistor;

[0034] One end of the third resistor is connected to the power supply, the other end of the third resistor is connected to the anode of the diode, the cathode of the diode is connected to the positive electrode of the energy storage capacitor, the positive electrode of the energy storage capacitor is also connected to the power-off detection unit, and the negative electrode of the energy storage capacitor is grounded.

[0035] In one embodiment, the power failure detection unit includes a third relay and a fourth resistor;

[0036] One end of the coil of the third relay is connected to the power supply through a fourth resistor, and the other end of the coil of the third relay is grounded to be energized according to the supply voltage provided by the power supply;

[0037] The first contact and the fourth contact of the third relay are both connected to the unlocking module, the second contact of the third relay is grounded, the third contact of the third relay is connected to the locking interface, the fifth contact of the third relay is connected to the energy storage unit, and the sixth contact of the third relay is connected to the unlocking interface;

[0038] The first contact of the third relay and the second contact of the third relay are normally open, the second contact of the third relay and the third contact of the third relay are normally closed, the fourth contact of the third relay and the fifth contact of the third relay are normally open, and the fifth contact of the third relay and the sixth contact of the third relay are normally closed;

[0039] When the coil of the third relay is energized, the first contact of the third relay is closed with the second contact of the third relay and the second contact of the third relay is disconnected from the third contact of the third relay, the fourth contact of the third relay is closed with the fifth contact of the third relay and the fifth contact of the third relay is disconnected from the sixth contact of the third relay.

[0040] In addition, to achieve the above-mentioned purpose, the present application further provides a charging device, the charging device comprising:

[0041] power supply;

[0042] A charging gun is provided with the above-mentioned charging gun electronic lock control circuit.

[0043] One or more technical solutions proposed in this application have at least the following technical effects:

[0044] The present application proposes a control circuit for controlling an electronic lock, including an unlocking module and a locking module, and the unlocking module is respectively connected to a power supply, a locking module and a control module, and the control module controls the working state of the unlocking module. When the control module does not generate an unlocking control signal, the unlocking module forwards the power supply voltage of the power supply to the locking module. When the control module generates an unlocking control signal, the unlocking module enters an unlocking state and provides the power supply voltage of the power supply to the electronic lock, so that the electronic lock performs an unlocking action according to the power supply voltage of the unlocking module. The working state of the locking module is also controlled by the control module. When the control module does not send a locking control signal, the locking module does not transmit the power supply voltage of the power supply to the electronic lock. When the control module sends a locking control signal, the locking module transmits the power supply voltage of the power supply to the electronic lock to make the electronic lock perform a locking action. That is to say, the present application controls the working state of the unlocking module or the locking module by the control module indirectly controlling the electronic lock, thereby affecting the path and duration of the electronic lock receiving the power supply voltage, thereby realizing the unlocking or locking action of the electronic lock. Since the working voltage duration of the driving pulse electronic lock is very short, that is, the duration of the unlocking control signal and the locking control signal is very short, the unlocking module and the locking module do not need to be powered on for a long time, thereby extending the service life of the unlocking module and the locking module, and thereby extending the life of the charging gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0047] Figure 1 A schematic diagram of module connections provided for an embodiment of the electronic lock control circuit of a charging gun of the present application;

[0048] Figure 2 A schematic diagram of circuit connection in a working state provided for an embodiment of the electronic lock control circuit of a charging gun of the present application;

[0049] Figure 3 A schematic diagram of circuit connection in a second working state provided for the embodiment of the charging gun electronic lock control circuit of the present application;

[0050] Figure 4 A schematic diagram of circuit connection in a third working state provided by the embodiment of the charging gun electronic lock control circuit of the present application;

[0051] Figure 5 Another module connection diagram provided for the embodiment of the charging gun electronic lock control circuit of the present application;

[0052] Figure 6 A schematic diagram of circuit connection in a fourth working state provided for the embodiment of the charging gun electronic lock control circuit of the present application;

[0053] Figure 7 This is a circuit connection diagram of the fifth working state provided in the embodiment of the charging gun electronic lock control circuit of the present application.

[0054] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0055] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0056] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0057] The main solution of the embodiment of the present application is: a charging gun electronic lock control circuit, connected to a power supply, the control circuit includes an unlocking module and a locking module connected in sequence, a control module connected to the unlocking module and the locking module respectively, and an electronic lock connected to the unlocking module and the locking module respectively, and the unlocking module is also connected to the power supply. The control module is used to generate a locking control signal when the charging gun is charging, and to generate an unlocking control signal when the charging gun is fully charged. The unlocking module is used to forward the power supply voltage provided by the power supply to the locking module, and to output the power supply voltage provided by the power supply to the electronic lock according to the unlocking control signal. The locking module is used to output the power supply voltage forwarded by the unlocking module to the electronic lock according to the locking control signal. The electronic lock is used to perform an unlocking action according to the power supply voltage output by the unlocking module or to perform a locking action according to the power supply voltage output by the locking module.

[0058] At present, in order to prevent the charging gun from falling off during high-current charging of electric vehicles and causing accidental electric shock, the charging gun should have a locking function when charging the electric vehicle. For example, an electronic lock is set on the charging gun to ensure that the charging gun is not unplugged while charging.

[0059] There are two main types of charging gun head locking devices, one is a level type electronic lock and the other is a pulse type electronic lock. The level type electronic lock is always powered and can heat up to 60°C under normal charging. The pulse type electronic lock works under positive and negative square wave pulses, and current flows only at the moment of action (normally 300 milliseconds), that is, power is only generated during the locking or unlocking process. The electronic lock has no loss in other states, and there is no problem of heating. It has the characteristics of low power consumption, easy control, high reliability and safety.

[0060] However, in the related art, the pulse-type electronic lock is controlled by a relay, with a high level locking and a low level unlocking. This control method using a relay requires the coil of the relay to be energized for a long time in order to maintain the locked state of the electronic lock of the charging gun. However, the long-term energization of the coil will affect the service life of the relay, causing the electronic lock of the charging gun to fail, and further affecting the life of the charging gun.

[0061] The present application provides a solution, which divides the control circuit of the electronic lock into an unlocking module and a locking module, and connects the unlocking module to the power supply and the control module respectively, and the control module controls the working state of the unlocking module. When the control module does not generate an unlocking control signal, the unlocking module forwards the power supply voltage of the power supply to the locking module. When the control module generates an unlocking control signal, the unlocking module enters an unlocking state and provides the power supply voltage of the power supply to the electronic lock, so that the electronic lock performs an unlocking action according to the power supply voltage of the unlocking module. The working state of the locking module is also controlled by the control module. When the control module does not send a locking control signal, the locking module does not transmit the power supply voltage of the power supply to the electronic lock. When the control module sends a locking control signal, the locking module transmits the power supply voltage of the power supply to the electronic lock to make the electronic lock perform a locking action. That is to say, the present application controls the working state of the unlocking module and the locking module by the control module through indirect control, thereby affecting the path and duration of the electronic lock receiving the power supply voltage, thereby realizing the unlocking or locking action of the electronic lock. Since the working voltage duration of the driving pulse electronic lock is very short, that is, the duration of the unlocking control signal and the locking control signal is extremely short (normally 300ms), the unlocking module and the locking module do not need to be powered on for a long time, which will not affect their lifespan. At the same time, since the unlocking and locking operations of the electronic lock are processed separately, the working frequency of the unlocking module or the locking module is further reduced compared to the working frequency of a relay performing both unlocking and locking operations at the same time, further extending the service life of the unlocking module and the locking module, thereby extending the service life of the charging gun.

[0062] Based on this, the embodiment of the present application provides a charging gun electronic lock control circuit, referring to Figure 1 , Figure 1 FIG. 4 is a schematic diagram of module connection of this embodiment.

[0063] In this embodiment, the charging gun electronic lock control circuit 20 is connected to the power supply 10, and the control circuit includes an unlocking module 201 and a locking module 202 that are connected to each other, a control module 203 connected to the unlocking module 201 and the locking module 202 respectively, and an electronic lock 204 connected to the unlocking module 201 and the locking module 202 respectively. The unlocking module 201 is also connected to the power supply 10.

[0064] Among them, the control module 203 is used to generate a locking control signal according to the detection signal of the charging gun receiving the charging action, and to generate an unlocking control signal according to the detection signal of the charging gun receiving the charging completion. The unlocking module 201 is used to forward the power supply voltage provided by the power supply 10 to the locking module 202, and output the power supply voltage provided by the power supply 10 to the electronic lock 204 according to the unlocking control signal. The locking module 202 is used to output the power supply voltage forwarded by the unlocking module 201 to the electronic lock 204 according to the locking control signal. The electronic lock 204 is used to perform an unlocking action according to the power supply voltage output by the unlocking module 201 or to perform a locking action according to the power supply voltage output by the locking module 202.

[0065] It should be noted that the control module 203 can be a processor or CPU (Central Processing Unit) with data processing capabilities. The control module 203 can generate a locking control signal based on the detection signal of the charging gun being charged, that is, when the charging gun is charging, to drive the locking module 202 to enter the locked working state. When the control module 203 can generate an unlocking control signal 201 based on the detection signal of the charging gun being charged, that is, when the charging gun is charged, to drive the unlocking module 201 to enter the unlocking working state. Both the locking control signal and the unlocking control signal can be a pulse signal with a duration of 300 milliseconds.

[0066] The unlocking module 201 is also connected to the power supply 10, the locking module 202, and the electronic lock 204 respectively. Before the charging gun is fully charged, that is, when the control module 203 does not generate an unlocking control signal, the unlocking module 201 is in a state of forwarding the power supply voltage of the power supply 10. At this time, the power supply voltage of the power supply 10 is forwarded to the locking module 202 through the unlocking module 201. When the charging gun is fully charged, that is, after the control module 203 generates an unlocking control signal and sends it to the unlocking module 201, the unlocking module 201 enters the unlocking working state. At this time, the unlocking module 201 provides the power supply voltage of the power supply 10 to the electronic lock 204, and the electronic lock 204 performs an unlocking action after receiving the working voltage provided by the unlocking module 201. It can be understood that the power supply voltage provided by the unlocking module 201 is the control voltage for controlling the electronic lock 204 to perform an unlocking action, and the duration of the control voltage is the same as the duration of the unlocking control signal. For example, when the control module 203 provides an unlocking control signal of 300 milliseconds, the unlocking module 201 correspondingly provides a control voltage of 300 milliseconds to the electronic lock 204, so that the electronic lock 204 performs the unlocking action accordingly.

[0067] The locking module 202 is also connected to the electronic lock 204. For the locking module 202, when the locking control signal is not received, the locking module 202 is in an open circuit state, that is, the locking module 202 does not provide the power supply voltage to the electronic lock 204. When the locking control signal is received, the locking module 202 enters the locking working state. At this time, the locking module 202 provides the power supply voltage to the electronic lock 204, and the electronic lock 204 performs the locking action after receiving the working voltage provided by the locking module 202. It can be understood that the electronic lock 204 is connected to the unlocking module 201 and the locking module 202 respectively through different interfaces to receive and distinguish the source of the power supply voltage and perform corresponding actions. It can be understood that the power supply voltage provided by the locking module 202 is the control voltage for controlling the electronic lock 204 to perform a locking action. The duration of the control voltage for the locking action is the same as the duration of the unlocking control signal. For example, when the control module 203 provides a 300-millisecond locking control signal, the locking module 202 correspondingly provides a 300-millisecond pulse voltage to the electronic lock 204, so that the electronic lock 204 performs a corresponding locking action.

[0068] In this embodiment, the electronic lock 204 is a pulse electromagnetic lock. It can be understood that in this embodiment, the control module 203 is used to control the working state of the unlocking module 201 and the working state of the locking module 202, and indirectly realizes the control of the power supply duration and the power supply path of the power supply voltage, thereby realizing the unlocking control or locking control of the electronic lock 204. Since the unlocking control signal and the locking control signal are both pulse control signals, their duration is very short and they will not continuously supply power to the unlocking module 201 or the locking module 202, thereby extending the service life of the unlocking module 201 and the locking module 202, thereby extending the service life of the charging gun. At the same time, since the unlocking module 201 and the locking module 202 are independently set in this embodiment, the operating frequency of the unlocking module 201 or the locking module 202 is further reduced compared to the operating frequency of a relay that performs unlocking and locking work at the same time, thereby further extending the service life of the unlocking module 201 and the locking module 202, thereby extending the service life of the charging gun.

[0069] In one possible implementation, refer to Figure 2 , Figure 2 This is a circuit connection diagram of the charging gun electronic lock control circuit of this embodiment in a working state.

[0070] In this embodiment, the electronic lock 204 includes an unlocking interface B and a locking interface A, and the unlocking module 201 includes a first relay K1 and a first resistor R1.

[0071] The coil of the first relay K1 is connected to the loop of the control module 203 via the first resistor R1 to be energized according to the unlocking control signal.

[0072] The first contact 1 of the first relay K1 and the fourth contact 4 of the first relay K1 are both connected to the locking module 202, the second contact 2 of the first relay K1 is grounded, the third contact 3 of the first relay K1 is connected to the locking interface A, the fifth contact 5 of the first relay K1 is connected to the power supply 10, and the sixth contact 6 of the first relay K1 is connected to the unlocking interface B.

[0073] The first contact 1 of the first relay K1 and the second contact 2 of the first relay K1 are normally closed, the second contact 2 of the first relay K1 and the third contact 3 of the first relay K1 are normally open, the fourth contact 4 of the first relay K1 and the fifth contact 5 of the first relay K1 are normally closed, and the fifth contact 5 of the first relay K1 and the sixth contact 6 of the first relay K1 are normally open.

[0074] Specifically, refer to Figure 2When the control module 203 does not output the unlocking control signal to the first relay K1, the first contact 1 of the first relay K1 and the second contact 2 of the first relay K1 are in a normally closed state, that is, the first contact 1 of the first relay K1 is connected to the second contact 2 of the first relay K1, and similarly, the fourth contact 4 of the first relay K1 is connected to the fifth contact 5 of the first relay K1. At this time, the power supply voltage provided by the power supply 10 is transmitted to the locking module 202 through the fifth contact 5 of the first relay K1 and the fourth contact 4 of the first relay K1.

[0075] Further, see Figure 3 , Figure 3 Schematic diagram of circuit connection of the electronic lock control circuit of the charging gun in the second working state in this embodiment.

[0076] In this embodiment, when the coil of the first relay K1 is energized, the first contact 1 of the first relay K1 is disconnected from the second contact 2 of the first relay K1 and the second contact 2 of the first relay K1 is closed to the third contact 3 of the first relay K1, the fourth contact 4 of the first relay K1 is disconnected from the fifth contact 5 of the first relay K1 and the fifth contact 5 of the first relay K1 is closed to the sixth contact 6 of the first relay K1.

[0077] Specifically, when the control module 203 outputs the unlocking control signal, the control module 203 applies a current signal from one end 7 of the coil to the other end 8 of the coil to the coil of the first relay K1. At this time, the coil of the first relay K1 is energized, so that the first contact 1 and the second contact 2 of the first relay K1 are disconnected, the second contact 2 of the first relay K1 and the third contact 3 of the first relay K1 are connected, the fourth contact 4 of the first relay K1 and the fifth contact 5 of the first relay K1 are disconnected, and the fifth contact 5 of the first relay K1 and the sixth contact 6 are connected. At this time, the power supply voltage of the power supply 10 is output to the unlocking interface B of the electronic lock 204 through the fifth contact 5 and the sixth contact 6, so that the electronic lock 204 performs the corresponding unlocking action.

[0078] It can be understood that the first relay K1 and its related components are used inside the unlocking module 201 to realize the logic switching of the unlocking module 201. When there is no unlocking control signal, the first relay K1 maintains the initial state, and the power supply voltage of the power supply 10 flows to the locking module 202 via a specific contact. When the control module 203 outputs the unlocking control signal, the state of the first relay K1 changes, and the power supply voltage provided by the power supply 10 is redirected to the unlocking interface B of the electronic lock 204, thereby triggering the unlocking of the electronic lock 204. The method of controlling the working state of the first relay K1 by the pulse unlocking control signal can not only accurately control the electronic lock 204 to perform the corresponding action, but also effectively reduce unnecessary power supply time and extend the service life of the first relay K1.

[0079] Further, see Figure 2 The unlocking module 201 further includes a first zener diode D1. The cathode of the first zener diode D1 is respectively connected to one end 7 of the coil of the first relay K1 and one end of the first resistor R1, and the other end of the first resistor R1 is connected to the control module 203. The anode of the first zener diode D1 is respectively connected to the other end 8 of the coil of the first relay K1 and the control module 203.

[0080] It can be understood that the first resistor R1 and the first voltage stabilizing diode D1 play a role in protecting the coil of the first relay K1.

[0081] In a feasible implementation, the electronic lock 204 includes an unlocking interface B and a locking interface A, and the locking module 202 includes a second relay K2 and a second resistor R2.

[0082] The coil of the second relay K2 is connected to the loop of the control module 203 via the second resistor R2 to be energized according to the locking control signal.

[0083] The second contact 2 and the fifth contact 5 of the second relay K2 are both connected to the unlocking module 201 , the third contact 3 of the second relay K2 is connected to the unlocking interface B, and the sixth contact 6 of the second relay K2 is connected to the locking interface A.

[0084] The first contact 1 of the second relay K2 and the second contact 2 of the second relay K2 are normally closed, the second contact 2 of the second relay K2 and the third contact 3 of the second relay K2 are normally open, the fourth contact 4 of the second relay K2 and the fifth contact 5 of the second relay K2 are normally closed, and the fifth contact 5 of the second relay K2 and the sixth contact 6 of the second relay K2 are normally open.

[0085] Specifically, refer to Figure 2 , when the charging gun electronic lock control circuit 20 is in Figure 2 In the working state shown, the second contact 2 of the second relay K2 is connected to the first contact 1 of the first relay K1, and the fifth contact 5 of the second relay K2 is connected to the fourth contact of the first relay K1.

[0086] When the control module 203 does not send a locking control signal, the first contact 1 of the second relay K2 and the second contact 2 of the second relay K2 are connected, the second contact 2 of the second relay K2 and the third contact 3 of the second relay K2 are disconnected, the fourth contact 4 of the second relay K2 and the fifth contact 5 of the second relay K2 are connected, and the fifth contact 5 of the second relay K2 and the sixth contact 6 of the second relay K2 are disconnected. At this time, the power supply voltage provided by the power supply 10 passes through the fifth contact 5 of the first relay K1, the fourth contact 4 of the first relay K1, the fifth contact 5 of the second relay K2 and the fourth contact 4 of the second relay K2 in sequence. Since the fourth contact 4 of the second relay K2 is open, the power supply voltage provided by the power supply 10 will not be output to the electronic lock 204.

[0087] Further, see Figure 4 , Figure 4 Schematic diagram of circuit connection of the electronic lock control circuit of the charging gun in the third working state in this embodiment.

[0088] In this embodiment, when the coil of the second relay K2 is energized, the first contact 1 of the second relay K2 and the second contact 2 of the second relay K2 are disconnected and the second contact 2 of the second relay K2 and the third contact 3 of the second relay K2 are closed, the fourth contact 4 of the second relay K2 and the fifth contact 5 of the second relay K2 are disconnected and the fifth contact 5 of the second relay K2 and the sixth contact 6 of the second relay K2 are closed.

[0089] Specifically, when the control module 203 sends a locking control signal, the coil of the second relay K2 obtains a current signal in the direction from one end 7 of the coil of the second relay K2 to the other end 8 of the coil of the second relay K2. At this time, the coil of the second relay K2 is energized, the first contact 1 of the second relay K2 is disconnected from the second contact 2 of the second relay K2, and the second contact 2 of the second relay K2 is closed with the third contact 3 of the second relay K2, the fourth contact 4 of the second relay K2 is disconnected from the fifth contact 5 of the second relay K2, and the fifth contact 5 of the second relay K2 is closed with the sixth contact 6 of the second relay K2. At this time, the supply voltage of the power supply 10 is transmitted to the locking interface A of the electronic lock 204 through the fifth contact 5 of the first relay K1, the fourth contact 4 of the first relay K1, the fifth contact 5 of the second relay K2 and the sixth contact 6 of the second relay K2 in sequence, and the electronic lock 204 performs a locking action according to the supply voltage.

[0090] It can be understood that the locking module 202 cooperates with the unlocking module 201 and the electronic lock 204 through the second relay K2 to realize the locking function of the electronic lock 204. The second relay K2 is driven by the locking control signal to ensure that the voltage is provided to the electronic lock 204 only when locking is required, thereby improving the accuracy and safety of the system. At the same time, the design of using the second relay K2 to separate from the unlocking module 201 reduces the load of a single component, reduces the failure rate, and thus prolongs the service life of the relay and the entire charging gun.

[0091] Furthermore, the locking module 202 further includes a second zener diode D2. The cathode of the second zener diode D2 is connected to one end 7 of the coil of the second relay K2 and one end of the second resistor R2, the other end of the second resistor R2 is connected to the control module 203, and the anode of the second zener diode D2 is connected to the other end 8 of the coil of the second relay K2 and the control module 203 respectively.

[0092] It can be understood that the second resistor R2 and the second voltage stabilizing diode D2 play a role in protecting the coil of the second relay K2.

[0093] In one possible implementation, refer to Figure 5 , Figure 5 This is a module connection diagram of the charging gun electronic lock control circuit including the power-off detection module in this application.

[0094] In this embodiment, the charging gun electronic lock control circuit 20 further includes a power failure detection module 205 connected to the power source 10 , the unlocking module 201 and the electronic lock 204 , respectively.

[0095] The power failure detection module 205 is used to detect the power supply status of the power supply 10, generate a normal power supply signal or a power supply stop signal, forward the power supply voltage to the unlocking module 201 according to the normal power supply signal, or output an emergency voltage according to the power supply stop signal. The electronic lock 204 is also used to perform an unlocking action according to the emergency voltage.

[0096] Specifically, it can be understood that the power supply 10 is an energy storage module in the charging device. When the charging device operates normally, the power supply 10 can supply power to the electronic lock 204 and the control module 203. When the charging device operates abnormally, the power supply 10 may not be able to supply power to the electronic lock 204 and the control module 203. This means that the control module 203 cannot work normally when the power supply 10 stops supplying power, that is, it cannot detect whether the charging gun is charging, and thus cannot generate the corresponding unlocking control signal and locking control signal. If during the charging process, the power supply 10 stops providing the power supply voltage due to an abnormality, the electronic lock 204 is in a locked state, and the control module 203 cannot work, so it cannot generate an unlocking control signal, so that the electronic lock 204 cannot be unlocked normally.

[0097] In this embodiment, the power failure detection module 205 is connected to the power supply 10 and is used to perform power failure detection on the power supply 10. The power failure detection module 205 can detect the power supply status of the power supply 10. At the same time, the power failure detection module 205 is also connected to the electronic lock 204. When the power supply 10 cannot provide the power supply voltage to the electronic lock 204 for unlocking, the power failure detection module 205 can also provide the electronic lock 204 with an emergency voltage according to the power supply stop signal, so that the electronic lock 204 performs the unlocking action.

[0098] It can be understood that the power failure detection module 205 is also connected to the unlocking module 201, and is used to forward the power supply voltage provided by the power supply 10 to the unlocking module 201 according to the normal power supply signal when the power supply 10 is supplying power normally.

[0099] It is understandable that when an abnormality occurs in the charging system and the power supply 10 cannot supply power normally, the power failure detection module 205 can respond quickly and provide emergency voltage to the electronic lock 204, ensuring that the electronic lock 204 can be automatically unlocked in an emergency, avoiding the charging gun from being locked and unable to be pulled out, and improving the safety of the electric vehicle charging process. At the same time, under normal power supply status, the power failure detection module 205 is responsible for forwarding the power supply voltage to the unlocking module 201, ensuring that the electronic lock 204 is accurately controlled according to the instructions of the control module 203, and under abnormal status, it can immediately switch to the emergency mode, and the electronic lock 204 can be unlocked without manual intervention, which improves the user experience and service efficiency.

[0100] Furthermore, the power failure detection module 205 includes an energy storage unit 206 and a power failure detection unit 207 which are connected to each other, the energy storage unit 206 and the power failure detection unit 207 are both connected to the power supply 10, and the power failure detection unit 207 is also connected to the unlocking module 201 and the electronic lock 204 respectively;

[0101] The power failure detection unit 207 is used to detect the power supply status of the power supply 10, generate a normal power supply signal or a power supply stop signal, and forward the power supply voltage to the unlocking module 201 according to the normal power supply signal;

[0102] The energy storage unit 206 is used to store the supply voltage according to the normal power supply signal, or output the emergency voltage according to the stop power supply signal;

[0103] The power failure detection unit 207 is further configured to forward the emergency voltage to the electronic lock 204 according to the power supply stop signal, so that the electronic lock 204 performs an unlocking action according to the emergency voltage.

[0104] Specifically, the energy storage unit 206 can be composed of an energy storage capacitor. The energy storage unit 206 is connected to the power supply 10. When the power supply 10 is supplying power normally, the energy storage unit 206 is charged according to the normal power supply signal. When the power supply 10 stops supplying power, the energy storage unit 206 can release the stored emergency voltage to the power-off detection unit 207 according to the power-off detection unit 207, so that the power-off detection unit 207 provides the emergency voltage to the electronic lock 204, and the electronic lock 204 performs an unlocking action according to the emergency voltage.

[0105] For the power failure detection unit 207, when the power supply 10 is working normally, the power failure detection unit 207 can forward the supply voltage of the power supply 10 to the unlocking module 201. When the power supply 10 stops providing the supply voltage, the power failure detection unit 207 obtains the emergency voltage from the energy storage unit 206 and provides the emergency voltage to the electronic lock 204, so that the electronic lock 204 performs the unlocking action.

[0106] In one possible implementation, refer to Figure 6 , Figure 6 When the power supply stops, the circuit connection diagram of the charging gun electronic lock control circuit including the power failure detection module in the fourth working state.

[0107] In this embodiment, the energy storage unit 206 includes an energy storage capacitor, a diode D4 and a third resistor R4;

[0108] One end of the third resistor R4 is connected to the power supply 10, the other end of the third resistor R4 is connected to the anode of the diode D4, the cathode of the diode D4 is connected to the positive electrode of the energy storage capacitor, the positive electrode of the energy storage capacitor is also connected to the power failure detection unit 207, and the negative electrode of the energy storage capacitor is grounded.

[0109] The power failure detection unit 207 includes a third relay K3 and a fourth resistor R3.

[0110] One end 7 of the coil of the third relay K3 is connected to the power source 10 via the fourth resistor R3 , and the other end 8 of the coil of the third relay K3 is grounded to be energized according to the supply voltage provided by the power source 10 .

[0111] The first contact 1 and the fourth contact 4 of the third relay K3 are both connected to the unlocking module 201, the second contact 2 of the third relay K3 is grounded, the third contact 3 of the third relay K3 is connected to the locking interface A, the fifth contact 5 of the third relay K3 is connected to the energy storage unit 206, and the sixth contact 6 of the third relay K3 is connected to the unlocking interface B.

[0112] The first contact 1 of the third relay K3 and the second contact 2 of the third relay K3 are normally open, the second contact 2 of the third relay K3 and the third contact 3 of the third relay K3 are normally closed, the fourth contact 4 of the third relay K3 and the fifth contact 5 of the third relay K3 are normally open, and the fifth contact 5 of the third relay K3 and the sixth contact 6 of the third relay K3 are normally closed.

[0113] Further, see Figure 7 , Figure 7 When the power supply is normal, the circuit connection diagram of the charging gun electronic lock control circuit including the power failure detection module in the fifth working state.

[0114] In this embodiment, when the coil of the third relay K3 is energized, the first contact 1 of the third relay K3 and the second contact 2 of the third relay K3 are closed and the second contact 2 of the third relay K3 and the third contact 3 of the third relay K3 are disconnected, the fourth contact 4 of the third relay K3 and the fifth contact 5 of the third relay K3 are closed and the fifth contact 5 of the third relay K3 and the sixth contact 6 of the third relay K3 are disconnected.

[0115] Specifically, in this embodiment, the energy storage unit 206 is composed of energy storage capacitor C1, energy storage capacitor C2, energy storage capacitor C3, energy storage capacitor C4, energy storage capacitor C5 and energy storage capacitor C6, and the positive electrode of the energy storage capacitor C1, the positive electrode of the energy storage capacitor C2, the positive electrode of the energy storage capacitor C3, the positive electrode of the energy storage capacitor C4, the positive electrode of the energy storage capacitor C5 and the positive electrode of the energy storage capacitor C6 are all connected to the power supply 10 through the diode D4 and the third resistor R4, and the positive electrode of the energy storage capacitor C1, the positive electrode of the energy storage capacitor C2, the positive electrode of the energy storage capacitor C3, the positive electrode of the energy storage capacitor C4, the positive electrode of the energy storage capacitor C5 and the positive electrode of the energy storage capacitor C6 are also connected to the power failure detection unit 207. The negative electrode of the energy storage capacitor C1, the negative electrode of the energy storage capacitor C2, the negative electrode of the energy storage capacitor C3, the negative electrode of the energy storage capacitor C4, the negative electrode of the energy storage capacitor C5 and the negative electrode of the energy storage capacitor C6 are all grounded.

[0116] When the power supply 10 is supplying power normally, the energy storage capacitor is continuously charged. At the same time, for the power-off detection unit 207, the coil of the third relay K3 is energized, that is, the third relay K3 generates a normal power supply signal. At this time, the first contact 1 of the third relay K3 and the second contact 2 of the third relay K3 are closed, and the second contact 2 of the third relay K3 and the third contact 3 of the third relay K3 are disconnected, the fourth contact 4 of the third relay K3 and the fifth contact 5 of the third relay K3 are closed, and the fifth contact 5 of the third relay K3 and the sixth contact 6 of the third relay K3 are disconnected, and the power supply voltage of the power supply 10 is transmitted to the fifth contact 5 of the first relay K1 through the third resistor R4, the diode D4, the fifth contact 5 of the third relay K3, and the fourth contact 4 of the third relay K3 in sequence, wherein the third resistor R4 and the diode D4 can be used to protect the energy storage capacitor.

[0117] It can be understood that the charging gun is in a normal working state at this time. When the charging gun starts to charge, the control module 203 sends a locking control signal to the second relay K2. At this time, the power supply voltage continues to be output from the fifth contact of the first relay K1 through the fourth contact 4 of the first relay K1, the fifth contact 5 of the second relay K2 and the sixth contact 6 of the second relay K2 to the locking interface A of the electronic lock 204, so that the electronic lock 204 performs a locking action. When the charging gun finishes charging, the control module 203 sends an unlocking control signal to the first relay K1. At this time, the power supply voltage continues to be output from the fifth contact 5 of the first relay K1 through the sixth contact 6 of the first relay K1 to the unlocking interface B of the electronic lock 204, so that the electronic lock 204 performs a corresponding unlocking operation.

[0118] When the power supply 10 stops supplying power, the energy storage capacitor releases the emergency voltage to the power failure detection unit 207. Specifically, the positive electrode of the energy storage capacitor is connected to the fifth contact 5 of the third relay K3 in the power failure detection unit 207, and when the power supply 10 stops supplying power, the energy storage capacitor releases the emergency voltage to the fifth contact 5 of the third relay K3.

[0119] At the same time, for the power-off detection unit 207, since the power supply 10 stops supplying power, the coil of the third relay K3 loses power, that is, the third relay K3 generates a power supply stop signal, the first contact 1 of the third relay K3 is disconnected from the second contact 2 of the third relay K3, the second contact 2 of the third relay K3 is connected to the third contact 3 of the third relay K3, the fourth contact 4 of the third relay K3 and the fifth contact 5 of the third relay K3 are disconnected, and the fifth contact 5 of the third relay K3 is connected to the sixth contact 6 of the third relay K3. At this time, the emergency voltage is transmitted to the unlocking interface B of the electronic lock 204 through the fifth contact 5 of the third relay K3 and the sixth contact 6 of the third relay K3 in sequence, so that the unlocking interface B of the electronic lock 204 performs an unlocking action.

[0120] It is worth mentioning that, in the present embodiment, one end 7 of the coil of the third relay K3 is also connected to the cathode of the third voltage-stabilizing diode D3, and the other end 8 of the coil of the third relay K3 is also connected to the anode of the third voltage-stabilizing diode D3, and the third voltage-stabilizing diode D3 can protect the coil of the third relay K3.

[0121] It is not difficult to see that in this embodiment, the first relay K1 is used to form the unlocking module 201, the second relay K2 is used to form the locking module 202, and the control module 203 is used to realize the control of the first relay K1 or the second relay K2, thereby realizing the unlocking control or locking control of the electronic lock 204. It can be understood that since the unlocking control signal or the locking control signal generated by the control module 203 are both pulse control signals with a very short duration, the coils of the first relay K1 and the second relay K2 do not need to be energized for a long time, thereby improving the life of the coils of the first relay K1 and the second relay K2. At the same time, since the first relay K1 and the second relay K2 realize the unlocking control and the locking control respectively, compared with realizing the unlocking control and the locking control by using one relay, the power-on frequency of the first relay K1 and the second relay K2 is lower, which further prolongs the service life of the first relay K1 and the second relay K2, thereby prolonging the service life of the charging gun. At the same time, this embodiment also uses the power-off detection module 205 to implement power-off detection of the power source 10, so that the electronic lock of the charging gun can be unlocked in time when the power source 10 of the charging device stops supplying power, thereby ensuring the safety of the entire charging process, eliminating manual unlocking, and facilitating actual on-site use.

[0122] The present application also provides a charging device, which includes a power source and a charging gun.

[0123] Among them, the charging gun is provided with the charging gun electronic lock control circuit described in the above embodiment.

[0124] The charging device provided in this embodiment can solve the technical problem that the relay life of the charging gun is short in the related art, which affects the life of the charging gun. Compared with the related art, the beneficial effects of the charging device provided in this application are the same as the beneficial effects of the charging gun electronic lock control circuit provided in the above embodiment, which will not be repeated here.

[0125] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0126] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0127] The above are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A charging gun electronic lock control circuit, characterized in that: connected to a power source, the control circuit includes an unlocking module and a locking module connected to each other, a control module connected to the unlocking module and the locking module respectively, and an electronic lock connected to the unlocking module and the locking module respectively, and the unlocking module is also connected to the power source; The control module is used to generate a locking control signal according to a detection signal received from the charging gun that the charging gun is performing a charging action, and to generate an unlocking control signal according to a detection signal received from the charging gun that charging is completed; The unlocking module is used to forward the power supply voltage provided by the power supply to the locking module, and output the power supply voltage provided by the power supply to the electronic lock according to the unlocking control signal; The locking module is used to output the power supply voltage forwarded by the unlocking module to the electronic lock according to the locking control signal; The electronic lock is used to perform an unlocking action according to the power supply voltage output by the unlocking module or to perform a locking action according to the power supply voltage output by the locking module.

2. The charging gun electronic lock control circuit according to claim 1, characterized in that: The electronic lock includes an unlocking interface and a locking interface, and the unlocking module includes a first relay and a first resistor; The coil of the first relay is connected to the circuit of the control module through the first resistor so as to be energized according to the unlocking control signal; The first contact of the first relay and the fourth contact of the first relay are both connected to the locking module, the second contact of the first relay is grounded, the third contact of the first relay is connected to the locking interface, the fifth contact of the first relay is connected to the power supply, and the sixth contact of the first relay is connected to the unlocking interface; The first contact of the first relay and the second contact of the first relay are normally closed, the second contact of the first relay and the third contact of the first relay are normally open, the fourth contact of the first relay and the fifth contact of the first relay are normally closed, and the fifth contact of the first relay and the sixth contact of the first relay are normally open; When the coil of the first relay is energized, the first contact of the first relay is disconnected from the second contact of the first relay and the second contact of the first relay is closed to the third contact of the first relay, the fourth contact of the first relay is disconnected from the fifth contact of the first relay and the fifth contact of the first relay is closed to the sixth contact of the first relay.

3. The charging gun electronic lock control circuit according to claim 2, characterized in that: The unlocking module further includes a first voltage stabilizing diode; The cathode of the first voltage stabilizing diode is respectively connected to one end of the coil of the first relay and one end of the first resistor, and the other end of the first resistor is connected to the control module; The anode of the first voltage stabilizing diode is connected to the other end of the coil of the first relay and the control module respectively.

4. The charging gun electronic lock control circuit according to claim 1, characterized in that: The electronic lock comprises an unlocking interface and a locking interface, and the locking module comprises a second relay and a second resistor; The coil of the second relay is connected to the circuit of the control module through the second resistor to be energized according to the locking control signal; The second contact and the fifth contact of the second relay are both connected to the unlocking module, the third contact of the second relay is connected to the unlocking interface, and the sixth contact of the second relay is connected to the locking interface; The first contact of the second relay and the second contact of the second relay are normally closed, the second contact of the second relay and the third contact of the second relay are normally open, the fourth contact of the second relay and the fifth contact of the second relay are normally closed, and the fifth contact of the second relay and the sixth contact of the second relay are normally open; When the coil of the second relay is energized, the first contact of the second relay is disconnected from the second contact of the second relay and the second contact of the second relay is closed with the third contact of the second relay, the fourth contact of the second relay is disconnected from the fifth contact of the second relay and the fifth contact of the second relay is closed with the sixth contact of the second relay.

5. The charging gun electronic lock control circuit according to claim 4, characterized in that: The locking module also includes a second voltage stabilizing diode; The cathode of the second voltage stabilizing diode is connected to one end of the coil of the second relay and one end of the second resistor, and the other end of the second resistor is connected to the control module; The anode of the second voltage stabilizing diode is connected to the other end of the coil of the second relay and the control module respectively.

6. The charging gun electronic lock control circuit according to claim 2, characterized in that: The control circuit further comprises a power failure detection module connected to the power supply, the unlocking module and the electronic lock respectively; The power failure detection module is used to detect the power supply status of the power supply, generate a normal power supply signal or a power supply stop signal, forward the power supply voltage to the unlocking module according to the normal power supply signal or output an emergency voltage according to the power supply stop signal; The electronic lock is also used to perform an unlocking action according to the emergency voltage.

7. The charging gun electronic lock control circuit according to claim 6, characterized in that: The power failure detection module includes an energy storage unit and a power failure detection unit connected to each other, the energy storage unit and the power failure detection unit are both connected to the power supply, and the power failure detection unit is also connected to the unlocking module and the electronic lock respectively; The power failure detection unit is used to detect the power supply state of the power supply, generate a normal power supply signal or a power supply stop signal, and forward the power supply voltage to the unlocking module according to the normal power supply signal; The energy storage unit is used to store the power supply voltage according to the normal power supply signal, or output the emergency voltage according to the power supply stop signal; The power failure detection unit is further configured to forward the emergency voltage to the electronic lock according to the power supply stop signal, so that the electronic lock performs an unlocking action according to the emergency voltage.

8. The charging gun electronic lock control circuit according to claim 7, characterized in that: The energy storage unit includes an energy storage capacitor, a diode and a third resistor; One end of the third resistor is connected to the power supply, the other end of the third resistor is connected to the anode of the diode, the cathode of the diode is connected to the positive electrode of the energy storage capacitor, the positive electrode of the energy storage capacitor is also connected to the power-off detection unit, and the negative electrode of the energy storage capacitor is grounded.

9. The charging gun electronic lock control circuit according to claim 7, characterized in that: The power failure detection unit includes a third relay and a fourth resistor; One end of the coil of the third relay is connected to the power supply through the fourth resistor, and the other end of the coil of the third relay is grounded to be energized according to the power supply voltage provided by the power supply; The first contact and the fourth contact of the third relay are both connected to the unlocking module, the second contact of the third relay is grounded, the third contact of the third relay is connected to the locking interface, the fifth contact of the third relay is connected to the energy storage unit, and the sixth contact of the third relay is connected to the unlocking interface; The first contact of the third relay and the second contact of the third relay are normally open, the second contact of the third relay and the third contact of the third relay are normally closed, the fourth contact of the third relay and the fifth contact of the third relay are normally open, and the fifth contact of the third relay and the sixth contact of the third relay are normally closed; When the coil of the third relay is energized, the first contact of the third relay is closed with the second contact of the third relay and the second contact of the third relay is disconnected from the third contact of the third relay, the fourth contact of the third relay is closed with the fifth contact of the third relay and the fifth contact of the third relay is disconnected from the sixth contact of the third relay.

10. A charging device, characterized in that: The charging device comprises: power supply; A charging gun, wherein the charging gun is provided with a charging gun electronic lock control circuit as described in any one of claims 1 to 9.

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