阅读说明：本技术 一种应用在充电桩上充电枪电子锁异常掉电自解锁电路 (Use and fill rifle electronic lock abnormal power down self-unlocking circuit on filling electric pile ) 是由 王宇飞 朱太平 柳小健 于 2020-12-31 设计创作，主要内容包括：本发明公开了一种应用在充电桩上充电枪电子锁异常掉电自解锁电路,属于电动汽车技术领域,包括AC/DC电路、DC/DC电路、MCU、充电枪和电子锁驱动电路,解决了异常断电后,电机式电子锁自动恢复到初始状态的技术问题,本发明用方便,无需通过MCU监测电压变化过程即可实现对电子锁的自动解锁,本发明采用大容量电容,充电快,工作温度范围宽,本发明整体系统设计简洁,无需额外增加解锁装置,集掉电自解锁与电子锁控制于一体,生产成本低,本发明的电子锁掉电自恢复安全性高,电容充电时间短,相应速度高,电路结构简单,易于生产。(The invention discloses an abnormal power-down self-unlocking circuit of an electronic lock of a charging gun applied to a charging pile, which belongs to the technical field of electric automobiles, and comprises an AC/DC circuit, a DC/DC circuit, an MCU (microprogrammed control unit), the charging gun and an electronic lock driving circuit, so that the technical problem that the motor type electronic lock automatically restores to an initial state after abnormal power-down is solved.)

1. The utility model provides an use and fill rifle electronic lock abnormal power failure self-unlocking circuit on filling electric pile which characterized in that: the charging gun comprises an AC/DC circuit, a DC/DC circuit, an MCU, a charging gun and an electronic lock driving circuit, wherein the input end of the AC/DC circuit is connected with an external alternating current power supply, the output end of the AC/DC circuit supplies power to the input end of the DC/DC circuit, and the output end of the DC/DC circuit supplies power to the MCU and the electronic lock driving module;

the output end of the DC/DC circuit is connected with the input end of a charging gun, and the output end of the charging gun charges the electric automobile;

the MCU controls the connection loop between the DC/DC circuit and the charging gun to be switched on or off;

the voltage input end of the electronic lock driving circuit for controlling the automatic unlocking of the internal motor of the charging gun is connected with the input end 12VIN of the charging gun, and the positive output end OUT + and the negative output end OUT-are both connected with the internal motor of the charging gun.

2. The abnormal power failure self-unlocking circuit applied to the charging gun electronic lock on the charging pile, as claimed in claim 1, is characterized in that: the DC/DC circuit is connected with the charging gun through a relay or controllable silicon, and the MCU controls the on-off of the relay or the controllable silicon through an IO port.

3. The abnormal power failure self-unlocking circuit applied to the charging gun electronic lock on the charging pile, as claimed in claim 1, is characterized in that: the AC/DC circuit is an AC-to-DC module, and the DC/DC circuit is a DC-to-DC module.

4. The abnormal power failure self-unlocking circuit applied to the charging gun electronic lock on the charging pile, as claimed in claim 1, is characterized in that: the electronic lock driving circuit comprises a relay K1, a diode D1, a diode D2, a diode D3, a capacitor C1 and a capacitor C2, an output end, namely a common end output end, is arranged at a common end of the relay K1, a normally closed end of the relay K1 is connected with a ground wire, a normally open end of the relay K1 is connected with a cathode of the diode D1, an anode of a diode D1 is connected with a cathode of the diode D2, an anode of the diode D2 is connected with a power supply voltage, an anode of the diode D2 is the input end 12VIN, and the power supply voltage is provided by the output end of the DC/DC circuit;

one end of a coil of the relay K1 is connected with the cathode of the diode D2, the other end of the coil of the relay K1 is connected with the ground wire, and the diode D3 serving as a freewheeling diode on the coil of the relay K1 is connected in parallel with the coil of the relay K1;

the output end of the common end is respectively connected with the anode of the capacitor C1 and the anode of the capacitor C2, and the cathode of the capacitor C1 is connected with the cathode of the capacitor C2 to form the positive output end OUT +;

the normally closed terminal of relay K1 constitutes the negative output terminal OUT-.

5. The charging gun electronic lock abnormal power failure self-unlocking circuit applied to the charging pile, as claimed in claim 4, is characterized in that: the power supply voltage is 12V voltage, 5V voltage or 24V voltage.

6. The charging gun electronic lock abnormal power failure self-unlocking circuit applied to the charging pile, as claimed in claim 4, is characterized in that: the capacitance values of the capacitor C1 and the capacitor C2 are both 10000uf, and the withstand voltage value is 16V.

7. The abnormal power failure self-unlocking circuit applied to the charging gun electronic lock on the charging pile, as claimed in claim 1, is characterized in that: the external alternating current power supply is a 220VAC mains supply.

Technical Field

The invention belongs to the technical field of electric automobiles, and relates to an abnormal power failure self-unlocking circuit applied to a charging gun electronic lock on a charging pile.

Background

Along with new energy automobile's popularization, demand to filling electric pile is increasing day by day, and the inside electronic lock that has of national standard rifle that charges, and most national standard rifle electronic locks that charge divide into electromagnetic type electronic lock and motor type electronic lock, and the electromagnetic type electronic lock adsorbs formula locking through the mode of electro-magnet, and motor type electronic lock then drives the motion of locking plate through inside motor to the card is on the spring bolt, thereby realizes the locking.

The electromagnetic electronic lock can recover the initial state after abnormal power failure;

but the electronic lock of motor formula is behind the unusual outage, because the motor can not be timely with the locking plate resume initial position to lead to the electronic lock to keep current locking state, can not independently resume initial state, the user can't pull out the rifle head that charges, can cause user's bad experience.

Disclosure of Invention

The invention aims to provide an abnormal power failure self-unlocking circuit applied to a charging gun electronic lock on a charging pile, and the technical problem that a motor type electronic lock automatically restores to an initial state after abnormal power failure is solved.

In order to achieve the purpose, the invention adopts the following technical scheme:

an abnormal power failure self-unlocking circuit of an electronic lock of a charging gun applied to a charging pile comprises an AC/DC circuit, a DC/DC circuit, an MCU, the charging gun and an electronic lock driving circuit, wherein the input end of the AC/DC circuit is connected with an external alternating current power supply, the output end of the AC/DC circuit supplies power to the input end of the DC/DC circuit, and the output end of the DC/DC circuit supplies power to the MCU and the electronic lock driving module;

the output end of the DC/DC circuit is connected with the input end of a charging gun, and the output end of the charging gun charges the electric automobile;

the MCU controls the connection loop between the DC/DC circuit and the charging gun to be switched on or off;

the voltage input end of the electronic lock driving circuit for controlling the automatic unlocking of the internal motor of the charging gun is connected with the input end 12VIN of the charging gun, and the positive output end OUT + and the negative output end OUT-are both connected with the internal motor of the charging gun.

Preferably, the DC/DC circuit is connected to the charging gun through a relay or a silicon controller, and the MCU controls the on/off of the relay or the silicon controller through an IO port.

Preferably, the AC/DC circuit is an AC to DC module and the DC/DC circuit is a DC to DC module.

Preferably, the electronic lock driving circuit comprises a relay K1, a diode D1, a diode D2, a diode D3, a capacitor C1 and a capacitor C2, an output end, namely a common end output end, is arranged at a common end of the relay K1, a normally closed end of the relay K1 is connected with a ground wire, a normally open end of the relay K1 is connected with a cathode of the diode D1, an anode of a diode D1 is connected with a cathode of the diode D2, an anode of the diode D2 is connected with a power supply voltage, an anode of the diode D2 is the input end 12VI N, and the power supply voltage is provided by the output end of the DC/DC circuit;

one end of a coil of the relay K1 is connected with the cathode of the diode D2, the other end of the coil of the relay K1 is connected with the ground wire, and the diode D3 serving as a freewheeling diode on the coil of the relay K1 is connected in parallel with the coil of the relay K1;

the output end of the common end is respectively connected with the anode of the capacitor C1 and the anode of the capacitor C2, and the cathode of the capacitor C1 is connected with the cathode of the capacitor C2 to form the positive output end OUT +;

the normally closed terminal of relay K1 constitutes the negative output terminal OUT-.

Preferably, the power supply voltage is 12V voltage, 5V voltage or 24V voltage.

Preferably, the capacitance values of the capacitor C1 and the capacitor C2 are both 10000uf, and the withstand voltage value is 16V.

Preferably, the external ac power supply is a 220VAC mains power supply.

The invention relates to an abnormal power failure self-unlocking circuit of an electronic lock of a charging gun applied to a charging pile, which solves the technical problem that the electronic lock of a motor type automatically restores to an initial state after abnormal power failure.

Drawings

FIG. 1 is a schematic block diagram of the present invention;

FIG. 2 is a circuit diagram of the driving circuit of the electronic lock of the present invention;

FIG. 3 is a timing diagram of the driving circuit of the electronic lock according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The abnormal power failure self-unlocking circuit applied to the charging gun electronic lock on the charging pile comprises an AC/DC circuit, a DC/DC circuit, an MCU, a charging gun and an electronic lock driving circuit, wherein the input end of the AC/DC circuit is connected with an external alternating current power supply, the output end of the AC/DC circuit supplies power to the input end of the DC/DC circuit, and the output end of the DC/DC circuit supplies power to the MCU and the electronic lock driving module;

the output end of the DC/DC circuit is connected with the input end of a charging gun, and the output end of the charging gun charges the electric automobile;

the MCU controls the connection loop between the DC/DC circuit and the charging gun to be switched on or off;

the voltage input end of the electronic lock driving circuit for controlling the automatic unlocking of the internal motor of the charging gun is connected with the input end 12VIN of the charging gun, and the positive output end OUT + and the negative output end OUT-are both connected with the internal motor of the charging gun.

Preferably, the DC/DC circuit is connected to the charging gun through a relay or a silicon controller, and the MCU controls the on/off of the relay or the silicon controller through an IO port.

Preferably, the AC/DC circuit is an AC to DC module and the DC/DC circuit is a DC to DC module.

Preferably, the electronic lock driving circuit comprises a relay K1, a diode D1, a diode D2, a diode D3, a capacitor C1 and a capacitor C2, an output end, namely a common end output end, is arranged at a common end of the relay K1, a normally closed end of the relay K1 is connected with a ground wire, a normally open end of the relay K1 is connected with a cathode of the diode D1, an anode of a diode D1 is connected with a cathode of the diode D2, an anode of the diode D2 is connected with a power supply voltage, an anode of the diode D2 is the input end 12VI N, and the power supply voltage is provided by the output end of the DC/DC circuit;

one end of a coil of the relay K1 is connected with the cathode of the diode D2, the other end of the coil of the relay K1 is connected with the ground wire, and the diode D3 serving as a freewheeling diode on the coil of the relay K1 is connected in parallel with the coil of the relay K1;

the output end of the common end is respectively connected with the anode of the capacitor C1 and the anode of the capacitor C2, and the cathode of the capacitor C1 is connected with the cathode of the capacitor C2 to form the positive output end OUT +;

the normally closed terminal of relay K1 constitutes the negative output terminal OUT-.

As shown in fig. 2, the relay K1 has pins 1, 2, 3, 4, 5 and 6, where pin 1 is a normally open end and is connected to the negative terminal of the diode D1, pin 2 is one end of a coil and is connected to the negative terminal of the diode D2, pin 3 and pin 4 are connected together and to the common terminal of the relay K1, pin 3 and pin 4 are connected to the positive terminal of the capacitor C1 and the positive terminal of the capacitor C2, pin 5 is the other end of the coil and is connected to the ground, pin 6 is a normally closed end and is connected to the ground, and the positive terminal of the freewheeling diode D3 is connected to pin 5 and the negative terminal is connected to pin 2;

in this embodiment, the sum of the voltage drops of the diode D1 and the diode D2 is 0.7V, the voltage input to the input terminal 12VI N is 12V, and after the voltage is reduced by the diode D1 and the diode D2, the voltage reaching the relay is 12V-0.7V — 11.3V.

In this embodiment, the charging currents of the capacitor C1 and the capacitor C2 are calculated by a capacitance current calculation formula: i ═ C × du/dt, where C is the capacitance value, I is the current, du is the differential value of the voltage value applied to the capacitance, and dt is the differential value of time, and the capacitance current calculation formula is a conventional one, and therefore, it is not described in detail.

In this embodiment, when calculating the discharge current of the capacitor C1 and the capacitor C2, the current and time need to be calculated according to the impedance of the internal motor of the charging gun, and the maximum current of the schottky diode and the relay needs to be considered in the calculation. In this embodiment, the diode D1 and the diode D2 are schottky diodes.

When the charging gun is used, the charging gun is in a power-on state and a power-off state, when the charging gun is connected with an electric vehicle and charges the electric vehicle, the charging gun is in the power-on state, the MCU controls the DC/DC circuit to supply power to the charging gun, the charging gun charges the electric vehicle, at the time, the electronic lock driving circuit of the invention detects the input end of the charging gun, namely, a 12V power supply provided by the DC/DC circuit is loaded on the input end 12VIN, at the time, the 12V power supply supplies power to a coil of a relay K1 through a diode D2 to enable the relay to act, a normally open end of the electronic lock driving circuit is closed, the 12V power supply can be loaded on pins 3 and 4 of the relay K1 through a diode D1 and a diode D2, so as to charge a capacitor C1 and a capacitor C2, at the time, a positive output end OUT + outputs a positive 11.3V voltage, a negative output end OUT-outputs a 0V voltage, and voltages, thereby make the motor action, realize the automatic locking of rifle that charges.

When the charging gun is connected with the electric vehicle but the electric vehicle is disconnected from charging, namely in a power-off state, no matter the MCU controls the DC/DC circuit to disconnect the power supply to the charging gun, or the power supply of the charging gun is disconnected due to an emergency (such as power failure), the electronic lock driving circuit of the invention detects that the 12V voltage at the input end of the charging gun becomes 0V, at the moment, the voltage at the input end 12VIN is 0V, the coil of the relay K1 cannot obtain the driving voltage, so that the charging gun is recovered to the original state, namely the normally-open end is disconnected, at the moment, the capacitor C1 and the capacitor C2 cannot carry OUT voltage mutation, the voltage is kept for a certain time and is applied to the common end of the relay K1, at the moment, the normally-closed end of the relay K1 is loaded with the voltage, so that the positive output end OUT + outputs negative 11.3V voltage, the negative output end OUT-outputs 0V voltage, and the internal motor of the, and automatic unlocking after power failure is realized.

FIG. 3 is a timing diagram of the driving circuit of the electronic lock. The MCU is used for controlling the on-off of 12V voltage in the circuit; when the voltage input is 12V, the capacitor is charged, and meanwhile, the voltage is output; when 12V is open, the relay switches, discharging capacitor C1 and capacitor C2.

Preferably, the power supply voltage is 12V voltage, 5V voltage or 24V voltage.

Preferably, the capacitance values of the capacitor C1 and the capacitor C2 are both 10000uf, and the withstand voltage value is 16V.

Preferably, the external ac power supply is a 220VAC mains power supply.

The invention relates to an abnormal power failure self-unlocking circuit of an electronic lock of a charging gun applied to a charging pile, which solves the technical problem that the electronic lock of a motor type automatically restores to an initial state after abnormal power failure.

In the present invention, any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.

The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.

In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.