CN208353044U - A kind of charging terminal of high reliability - Google Patents

Abstract

The utility model discloses a kind of charging terminals of high reliability, including power supply circuit, MCU Main Processing Unit circuit, GPRS linking Internet circuit, charging voltage value Acquisition Circuit, charging current value Acquisition Circuit, self-diagnostic circuit and control relay circuit, MCU Main Processing Unit circuit controls connection power supply circuit, GPRS linking Internet circuit, charging voltage value Acquisition Circuit, charging current value Acquisition Circuit, self-diagnostic circuit and control relay circuit respectively.This charging terminal can real-time monitoring charging current, voltage, the self diagnosis of failure can be carried out, the hidden danger of charging process is avoided as far as possible, greatly improve security reliability.

Description

A kind of charging terminal of high reliability

Technical field

The utility model relates to charging techniques, and in particular to the charging terminal for Vehicular charging.

Background technique

With increasing for electric bicycle usage amount, electric bicycle disorderly stops to leave about bring fire hazard more and more tighter Weight, the case that electric bicycle causes fire take place frequently in the recent period, cause serious economic loss or even casualties to people.It occupies The concentration of electric bicycle is parked in people community and some public places and management has become a big main trend.It is electronic from Driving concentration is parked and management region, and it is urgent for providing safe and reliable electric bicycle Charge Management terminal also to become a urgency The market demand.

Most of electric bicycle charging terminal currently on the market is using coin or the traditional design of card-scanning type, Shao Shuozhi It holds and is paid using modes barcode scannings such as wechat, Alipays, the means of payment often uses prepayment mode, i.e., all needs before charging every time Insert coins, swipe the card or barcode scanning is paid, and be only capable of charging according to pre-payment duration, do not provide power detection, Full of functions such as automatic stops.Meanwhile charging accounting mode is often according to the single mode of time-based charging, the i.e. different electricity of charge power The charging accounting standard of motor-car is consistent.Control for charging terminal, current implementation are often to grasp under operation maintenance personnel line Make or operation is managed in the delay of data, rarely has and realize that the real time data of charging terminal is remote based on platform of internet of things and Cloud Server It passes and remote real time monitoring of terminal etc. is designed.

Through summarizing, existing electronic automobile-used charging terminal has the following disadvantages: in actual application

(1) it traditional charging modes such as inserts coins, swipe the card, operationally often resulting in inconvenience, user is such as needed to prepare in advance firmly Coin goes to recharge point under line to be supplemented with money in advance.

(2) mode for the pre-payment that charges easily causes electric vehicle to overcharge or the situations such as undercharge, meets during the charging process It is big by reimbursement difficulty when pulling out to socket, easily cause the loss of user.

(3) single Fare determined by travel time mode cannot it is accurate, fair, reasonably charge, easily cause operation personnel and part to use The benefit damage at family.

(4) charging terminal can not be communicated with background server in real time, and data is easy to cause to upload in inaccurate, exception Situations such as reporting not in time increases the difficulty managed to charging terminal.

(5) can not each port of real-time monitoring electric current, voltage and power situation, be unable to self-adapting estimation and adjustment filled Electric current, is also easy to produce overcharge Deng danger, and security risk is larger.

(6) charging port of single charging terminal is less, is unfavorable for rationally utilizing complete machine resource, sexual valence is relatively low.

Wherein, electronic automobile-used charging terminal can not effectively monitor the electric current, voltage and power situation of each port, cannot Effectively identification and adjustment charging current, is also easy to produce overcharge Deng danger, causes entire electronic automobile-used charging terminal security risk larger, This is that current electronic automobile-used charging terminal primarily solves the problems, such as.

Utility model content

For the problem that existing electronic automobile-used charging terminal security risk is larger, a kind of new charging scheme is needed.

For this purpose, the purpose of this utility model is to provide a kind of charging terminal of high reliability, to overcome the prior art to pacify The larger problem of full hidden danger.

In order to achieve the above object, the charging terminal of high reliability provided by the utility model, including power supply circuit, MCU Main control unit circuit, GPRS linking Internet circuit, charging voltage value Acquisition Circuit, charging current value Acquisition Circuit, self diagnosis Circuit and control relay circuit, the MCU Main Processing Unit circuit control connection power supply circuit, GPRS linking Internet respectively Circuit, charging voltage value Acquisition Circuit, charging current value Acquisition Circuit, self-diagnostic circuit and control relay circuit.

Further, the power supply circuit is mainly by AC-DC switching power source chip, low voltage difference DC-DC conversion IC and low DC-DC conversion IC that pressure difference is adjustable cooperation is constituted, and the AC-DC switching power source chip input terminal connects AC220V, output end connection The input terminal of low voltage difference DC-DC conversion IC and the adjustable DC-DC conversion IC of low voltage difference.

Further, the charging voltage value Acquisition Circuit is mainly with single-phase electric quantity metering chip and current transformer Constitute, the primary coil of the current transformer terminate into 6 series resistances and secondary coil terminate into a resistance, single-phase electricity Amount metering chip corresponds to pin and carries out the sampling of real-time voltage virtual value to the low-voltage AC of secondary coil.

Further, the charging current value Acquisition Circuit is mainly by the electric current of single-phase electric quantity metering chip and 5A/2.5mA Mutual inductor cooperation is constituted.

Further, the self-diagnostic circuit includes charging port self-diagnostic circuit and supply voltage self-diagnostic circuit.

Further, the control relay circuit is made of JQC-3FF relay, relay coil connection rectification two Pole pipe.

Further, the charging terminal further includes acousto-optic warning circuit.

Further, the charging terminal further includes temperature observation circuit.

Charging terminal provided by the utility model can real-time monitoring charging current, voltage, it can be achieved that be full of automatic stop function, And the self diagnosis of most common failure is carried out, the hidden danger of charging process is avoided as far as possible, greatly improves security reliability.

Furthermore this charging terminal by GPRS in use, can access Cloud Server, realization terminal operating number as needed According to upload precisely in real time and server-side is to the remote-control of terminal.

Furthermore this charging terminal is in use, can be used 16 tunnels charging output port mode, it can be achieved that concurrently and independently right 16 electric bicycles charge.

Detailed description of the invention

The utility model is further illustrated below in conjunction with the drawings and specific embodiments.

Fig. 1 is the functional block diagram of charging terminal in this example；

Fig. 2 is the schematic diagram of power supply circuit in this example；

Fig. 3 is the schematic diagram of GPRS linking Internet circuit in this example；

Fig. 4 is the schematic diagram of charging voltage value Acquisition Circuit in this example；

Fig. 5 is the schematic diagram of charging current value sample circuit in this example；

Fig. 6 is the schematic diagram of charging port self-diagnostic circuit in this example；

Fig. 7 is the schematic diagram of supply voltage self-diagnostic circuit in this example；

Fig. 8 is the schematic diagram of control relay circuit in this example.

Specific embodiment

In order to be easy to understand the technical means, creative features, achievement of purpose, and effectiveness of the utility model, under Face combines and is specifically illustrating, and the utility model is further described.

Referring to Fig. 1, the charging terminal 100 that this example provides mainly by power supply circuit 110, MCU Main Processing Unit circuit 120, GPRS linking Internet circuit 130, charging voltage value Acquisition Circuit 140, charging current value Acquisition Circuit 150, self-diagnostic circuit 160, control relay circuit 170, acousto-optic warning circuit 180 and the cooperation of temperature observation circuit 190 are constituted, wherein charging voltage value Acquisition Circuit 140, charging current value Acquisition Circuit 150, self-diagnostic circuit 160, acousto-optic warning circuit 180 and temperature observation circuit 190 connect with GPRS linking Internet circuit 130, and to control power supply circuit 110, GPRS respectively mutual for MCU Main Processing Unit circuit 120 Networking access circuit 130, charging voltage value Acquisition Circuit 140, charging current value Acquisition Circuit 140, self-diagnostic circuit 150, after Electrical apparatus control circuit 160, acousto-optic warning circuit 170 and temperature observation circuit 180, and coordinate cooperating between them, it can Situations such as realizing real-time monitoring electric current, voltage, power, avoids the danger of charging process as far as possible, greatly improves entire charging eventually Hold the safety in 100 use processes.

Referring to fig. 2 which shows the built-up circuit schematic diagram of power supply circuit 110 in this example.As seen from the figure, this power supply electricity Road is mainly constituted with AC-DC Switching Power Supply, low voltage difference DC-DC conversion IC and the adjustable DC-DC conversion IC of low voltage difference, wherein AC-DC Switching Power Supply IRM-20-5 realizes and 220VAC is converted into 5VDC, provides confession for the direct current supply part of whole system Electricity；Low voltage difference DC-DC conversion IC, preferably MCP1702-3302E/B realize that the 5VDC voltage that AC-DC Switching Power Supply is converted turns It is changed to 3.3VDC voltage, provides 3.3V power supply for MCU etc..Low voltage difference is adjustable DC-DC conversion IC, preferably MIC9302, connection AC-DC Switching Power Supply, the 5VDC voltage for converting AC-DC Switching Power Supply are converted to 3.9V D/C voltage, are the part GPRS electricity Road provides 3.9V power supply, guarantees that GPRS circuit has the power supply of enough voltage and current load capacity.The partial circuit is integrally realized Conversion of the system power supply from exchange to different voltages DC voltage, respectively whole system provide different D.C. power requirements.

MCU Main Processing Unit circuit 120 in the present apparatus is made of MCU and its minimum system, in this example preferably STM32F103RCT6 processor is managed and controls for the different operating process to whole equipment, enables whole equipment Reliable and stable operation.

Referring to Fig. 3 which shows the built-up circuit schematic diagram of GPRS linking Internet circuit 130 in this example.It can by figure Know, which is made up of M6312 mould group based on GPRS network, the mould group by built-in SIM card chip register into GPRS network.

Based on the circuit, this can be realized access internet in equipment as needed, so as to be embodied as Cloud Server and Data interaction between charging terminal provides link, and from the Internet of Things networking that charging terminal may be implemented, charging terminal can be certainly Oneself collected data and the information monitored are transferred to Cloud Server, and receive the control task that Cloud Server is assigned.

Charging voltage value Acquisition Circuit 140 in this example is for power grid alternating current voltage when charging to charging terminal The real-time sampling of virtual value controls electric bicycle charging process according to collected voltage value, provides overvoltage guarantor Shield and under-voltage protection, avoid damaging electric car charger when high voltage and low-voltage.Meanwhile it is electronic certainly for system identification The charge power of driving provides voltage parameter.

Referring to fig. 4, the charging voltage value Acquisition Circuit 140 in this example is mainly by single-phase electric quantity metering chip RN8029D Cooperate with the current transformer PT1 of 2mA/2mA and constitute, realizes the acquisition to alternating current voltage virtual value.In order to realize sampling electricity Road is isolated with AC load circuit, the current transformer of the 2mA/2mA in this circuit, primary coil terminate into 6 27k Ω series resistance, and secondary coil terminate into 51 Ω resistance, the function of mutual induction of voltage is achieved in, primary coil end High Level AC Voltage is converted to the low-voltage AC at secondary coil end, while the correspondence pin of single-phase electric quantity metering chip RN8029D The sampling of real-time voltage virtual value is carried out to the low-voltage AC of secondary coil, by primary coil while and electricity when secondary coil Multiple is pressed, actual High Level AC Voltage voltage value is calculated, completes the sampling to practical alternating current voltage virtual value.

Charging current value Acquisition Circuit 150 in this example, for realizing to electric bicycle charging current virtual value Real-time sampling carries out overcurrent protection for system and full of automatic stop function provides judgment basis, when detecting that charging port accesses More than specified loads current value when, avoid that charging terminal and mains-power circuit are caused to impact, it is automatic to disconnect load.When detecting Charging current value lower than electric vehicle when fully charged after current threshold when, it is automatic to disconnect load, stop charging, avoid electric vehicle mistake It fills and causes fire.

Referring to Fig. 5, the charging current value Acquisition Circuit 160 in this example is mainly by single-phase electric quantity metering chip RN8029D Cooperate with the Current Transmit 1 of 5A/2.5mA and constitutes.The current transformer of 5A/2.5mA in this circuit, for load end Electric current carries out the conversion of 2000:1, then the electric current converted is converted to voltage, single-phase electric quantity metering by the resistance of 51 Ω The respective pin of chip RN8209D samples voltage, last to carry out relevant calculation according to the voltage value sampled, obtains and fills The size of electric current.

For self-diagnostic circuit 160 in this example for realizing to system maintenance and trouble hunting, this self-diagnostic circuit 150 can To realize the operating condition of remote monitor device, and the self diagnosis of some most common failures is made, personnel easy to repair carry out failure Positioning.

This self-diagnostic circuit 160 mainly includes charging port self-diagnostic circuit and supply voltage self-diagnostic circuit two parts.

Charging port self-diagnostic circuit in this example is for realizing the self diagnosis to protective tube state, port idle state The self-test of (in free time/charging) as needed can reach monitoring result in GPRS linking Internet circuit 130, then by GPRS Linking Internet circuit 130 is sent by GPRS network to Cloud Server, and long-range monitoring is carried out.

Referring to Fig. 6 which shows the theory of constitution figure of charging port self-diagnostic circuit in this example.The circuit passes through zero load When, relay be closed post-sampling to current value size judge the state of port, if detected after relay closure Current value is 0, illustrates that the protective tube of the port breaks down, i.e., port is malfunction, if the electric current detected is equal to When the load current of RLa1, RLa2, RLa3, RLa4 composition load, illustrate that the port is idle state, the electric current detected is greater than When the load current of RLa1, RLa2, RLa3, RLa4 composition load, illustrate that the port is in charged state.

Supply voltage self-diagnostic circuit in this example can cooperate the AD sample port of MCU, realize and export to Switching Power Supply The real-time monitoring of voltage, the operating voltage of MCU and GPRS supply voltage, and monitoring information is sent by GPRS to Cloud Server, It realizes the long-range monitoring to these voltage indexes, provides judgement information for the self diagnosis of some most common failures.

Referring to Fig. 7 which shows the theory of constitution figure of supply voltage self-diagnostic circuit in this example.The circuit passes through MCU A/D converter circuit, voltage value sampled measurements are carried out to tri- voltages of DVCC, VD and VCC_RF respectively, when the voltage value measured Within the scope of normal voltage value, then power supply is normal, if detecting the voltage value of any one voltage not in normal voltage value model In enclosing, then abnormality is reported to backstage and sends notification information to administrator by abnormal electrical power supply, system.

Control of the control relay circuit 170 for realizing terminal to charging process in this example, closing relay are opened Begin to charge to electric bicycle, disconnect relay, stops the charging to electric bicycle, be the executing agency of control process.

Referring to Fig. 8, the control relay circuit 170 in this example is mainly by JQC-3FF relay and rectifier diode 1N4001 cooperation is constituted.

Wherein, the both ends of the relay coil connection rectifier diode 1N4001 of JQC-3FF relay, and rectifier diode The base stage of the collector of the positive connecting triode Q4 (CS8050) of 1N4001, rectifier diode 1N4001, triode Q4 connects One end of capacitor Ca17 and resistance Ra16 are connect, and triode Q4 emitter connects the one of the capacitor Ca17 other end and resistance Ra17 It holds and is grounded；The other end of the other end connection resistance Ra17 of resistance Ra16.

In the control relay circuit 170 relay coil of JQC-3FF relay by rectifier diode 1N4001 into Row afterflow, induced electromotive force very big on coil damages component in circuit when relay being avoided to be closed.

On the basis of above scheme, acousto-optic warning circuit 170 is further arranged for the operation shape to system in this example State is warned, and the bright warning equipment of power supply indicator is electriferous state, and maintenance needs to power off in advance, and buzzer passes through different Sound is warned, to indicate the different operating status of system.

This example is further arranged temperature observation circuit 180 and makes entirely have temperature-monitoring function, to avoid mounting ring Border temperature is excessively high, and there are security risks when electric vehicle charges.

This temperature observation circuit 180 is mainly made of digital temperature sensor DS18B20, and the temperature observation circuit 180 is right Temperature carries out acquisition in real time and collected temperature is reached GPRS linking Internet circuit 130, then by GPRS linking Internet Circuit 130 is sent by GPRS network to Cloud Server, and the long-range monitoring of temperature is carried out, and is filled safely when temperature is higher than electric bicycle When the temperature that electrical environment requires, the charging to electric bicycle can be stopped, eliminating to come under hot environment to electric vehicle charge-carrying belt Fire hazard.

Based on above scheme constitute charging terminal 100 can real-time monitoring charging voltage and electric current, realize under-voltage, mistake Voltage protection, while self-adapting estimation and adjustment charging current, avoid short circuit and overcharge, realize and be full of automatic stop function.It simultaneously can Real-time monitoring and most common failure self diagnosis are carried out to charging port, ensure charging safety.It as needed can also be to charging terminal electricity Road and structure design, and increase charging port while ensureing performance, improve the cost performance of charging terminal, are such as charged using 16 tunnels Output port mode can concurrently and independently charge to 16 electric bicycles, so as to accomplish most the cost performance of complete machine It is excellent, the resource of maximum shared device.

Furthermore this charging terminal 100 is in specific application, GPRS linking Internet circuit thereon can be passed through as needed 130 link with backstage Cloud Server, realize control, monitoring and management of the Cloud Server to charging terminal, while Cloud Server connects Enter Tencent's wechat cloud platform, the wechat payment of the way of paying and current mainstream of charging terminal is associated, the use of user It operates more convenient.Simultaneously in terms of metering, the power and electric current of controlling terminal energy automatic identification electric bicycle charging, root Fair and reasonable charging is carried out according to the charge power of electric bicycle.Charging current identification to electric bicycle, to inhomogeneity The electric vehicle of type, self-adapting estimation and adjustment charging current threshold value, charging current cut off charge power supply when being lower than threshold value, avoid electricity Overcharging for motor-car on fire causes fire.

Thus this charging terminal 100 and the cooperation of backstage Cloud Server can form the expense control electric vehicle Charging of complete set System, can form following functional characteristics:

(1) realize charging terminal and server real time communication, ensure charging terminal operation data real-time teletransmission and Remote monitoring and control of the server to charging process.

(2) it is supplemented with money on realization line and post-paid mode, i.e. user pays again after charging, avoid socket from being pulled out, system The big problem of reimbursement difficulty when exception.

(3) charging accounting Price Gradient can be preset in server end, i.e., different charge powers match different charging valences Lattice, while server end real-time monitoring charge power carry out reasonably charging according to watt level.

Basic principles, main features, and advantages of the present invention has been shown and described above.Current row The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also It will have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.The utility model Claimed range is defined by the appending claims and its equivalent thereof.

Claims (8)

1. the charging terminal of high reliability, which is characterized in that connect including power supply circuit, MCU Main Processing Unit circuit, the internet GPRS Enter circuit, charging voltage value Acquisition Circuit, charging current value Acquisition Circuit, self-diagnostic circuit and control relay circuit, institute State MCU Main Processing Unit circuit control respectively connection power supply circuit, GPRS linking Internet circuit, charging voltage value Acquisition Circuit, Charging current value Acquisition Circuit, self-diagnostic circuit and control relay circuit.

2. the charging terminal of high reliability according to claim 1, which is characterized in that the power supply circuit is mainly by AC- DC switching power source chip, low voltage difference DC-DC conversion IC and the adjustable DC-DC conversion IC cooperation of low voltage difference are constituted, and the AC-DC is opened Powered-down source chip input terminal connects AC220V, and output end connects low voltage difference DC-DC conversion IC and the adjustable DC-DC conversion of low voltage difference The input terminal of IC.

3. the charging terminal of high reliability according to claim 1, which is characterized in that the charging voltage value Acquisition Circuit Mainly constituted with single-phase electric quantity metering chip and current transformer, the primary coil of the current transformer terminate into 6 A series resistance and secondary coil are terminated into a resistance, and single-phase electric quantity metering chip corresponds to pin to the low-voltage alternating-current of secondary coil Electricity carries out the sampling of real-time voltage virtual value.

4. the charging terminal of high reliability according to claim 1, which is characterized in that the charging current value Acquisition Circuit Mainly constituted with the current transformer of single-phase electric quantity metering chip and 5A/2.5mA.

5. the charging terminal of high reliability according to claim 1, which is characterized in that the self-diagnostic circuit includes charging Port self-diagnostic circuit and supply voltage self-diagnostic circuit.

6. the charging terminal of high reliability according to claim 1, which is characterized in that the control relay circuit by JQC-3FF relay is constituted, and relay coil connects rectifier diode.

7. the charging terminal of high reliability according to claim 1, which is characterized in that the charging terminal further includes acousto-optic Warning circuit.

8. the charging terminal of high reliability according to claim 1, which is characterized in that the charging terminal further includes temperature Observation circuit.