CN103490488B - The vehicle-mounted charging management system of electric automobile and its implementation - Google Patents
The vehicle-mounted charging management system of electric automobile and its implementation Download PDFInfo
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- CN103490488B CN103490488B CN201310459819.XA CN201310459819A CN103490488B CN 103490488 B CN103490488 B CN 103490488B CN 201310459819 A CN201310459819 A CN 201310459819A CN 103490488 B CN103490488 B CN 103490488B
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Abstract
The invention discloses the vehicle-mounted charging management system of a kind of electric automobile and its implementation, described system comprises charging socket, auxiliary power circuit, power grid voltage detection circuit, control guiding testing circuit, master controller, output rearrangeable switch power supply and for realizing the display control module of man-machine interface, described charging socket is charging pile socket or universal power supply socket; Described charging socket produces for the dc source to power grid voltage detection circuit, control guiding testing circuit, master controller and display control module power supply auxiliary power circuit by connecting electrical network, described power grid voltage detection circuit, control guiding testing circuit and output rearrangeable switch power supply are connected with master controller respectively, and described master controller is connected with display control module by CAN bus. The vehicle-mounted charging management system of electric automobile of the present invention has expanded the charging occasion of electric automobile, really accomplishes freely charging of electric automobile, facilitates using and promoting of electric automobile.
Description
Technical field
The present invention relates to a kind of vehicle-mounted charge management system, the vehicle-mounted charging management system of especially a kind of electric automobile andImplementation method, belongs to the charging field of electric automobile.
Background technology
Electric automobile is an important directions of development of automobile, is conducive to solve oil shortage, air pollution, city and makes an uproarThe problems such as the trough of sound and electrical network. Because the battery capacity of electric automobile is large, prior art requires special charging equipmentCharge. The construction of charging station is a long-term process, also reaches far away the level distribution of filling station, stillThe distribution of electrical network is but far longer than the distribution of gas station. If electric automobile can, as common electrical equipment, connect commonSupply socket just can be charged, and can make full use of existing power distribution network and charge, and comprises city, cities and towns and rural area,This will greatly expand the charging place of electric automobile, reaches whenever and wherever possible all chargeable chargings freely. On the other hand,Custom from general public with automobile, drive the time much smaller than down time average every day, if can utilize parkingTime is realized trickle charge, can extend the service life of electrokinetic cell, and the charging of electrical network trough can also reduce making of electric automobileUse cost.
Summary of the invention
The object of the invention is the defect in order to solve above-mentioned prior art, provide a kind of and can expand filling of electric automobileElectric field closes, and can reduce the vehicle-mounted charging management system of use cost electric automobile of electric automobile.
Another object of the present invention is to provide a kind of realization side based on the vehicle-mounted charging management system of above-mentioned electric automobileMethod.
Object of the present invention can be by taking following technical scheme to reach:
The vehicle-mounted charging management system of electric automobile, is characterized in that: comprise charging socket, auxiliary power circuit, electrical networkVoltage detecting circuit, control guiding testing circuit, master controller, output rearrangeable switch power supply and man-machine for realizingThe display control module at interface, described charging socket is charging pile socket or universal power supply socket; Described charging socket is logicalCrossing connection electrical network produces for guiding testing circuit, master control to power grid voltage detection circuit, control auxiliary power circuitThe dc source of device processed and display control module power supply, described power grid voltage detection circuit, control guiding testing circuit andOutput rearrangeable switch power supply is connected with master controller respectively, and described master controller is by CAN bus and display control moduleConnect.
As a kind of preferred version, described power grid voltage detection circuit comprises that micro electric flow pattern voltage transformer, difference putLarge circuit, the first resistance and the second resistance, the input of described micro electric flow pattern voltage transformer is connected with electrical network,Output is connected with master controller by differential amplifier circuit; Described the first resistance is connected on micro electric flow pattern mutual induction of voltageBetween device and electrical network, described the second resistance is connected in parallel between micro electric flow pattern voltage transformer and differential amplifier circuit.
As a kind of preferred version, described control guiding testing circuit comprises voltage follower, photoelectrical coupler, the 3rdResistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the first diode and the two or twoUtmost point pipe, the CC end of described charging socket, one end of the 3rd resistance, one end of the 4th resistance connect respectively voltage followThe input of device, the other end ground connection respectively of the PE end of described charging socket and the 4th resistance, described voltage followerOutput is connected with master controller after the 6th electric resistance partial pressure through the 5th resistance, and the CP of described charging socket end is by theOne diode is connected with the input of photoelectrical coupler with the 7th resistance, and the positive pole of described the second diode connects photoelectricity couplingClose the input of device, the minus earth of described the second diode, one end connection photoelectrical coupler of described the 8th resistanceOutput.
As a kind of preferred version, described output rearrangeable switch power supply comprises Switching Power Supply accessory power supply, has PFC controlElectricity is controlled in the AC-DC translation circuit of system, the DC-AC-DC circuit with full-bridge inverting and synchronous rectification and measurementRoad, described Switching Power Supply accessory power supply adopts the topological structure of reverse exciting switching voltage regulator and LDO voltage-stablizer composition, by connectingConnect charging socket output straight for what power to AC-DC translation circuit, DC-AC-DC circuit and circuit of measurement and controlStream power supply, described AC-DC translation circuit is connected with DC-AC-DC circuit respectively with circuit of measurement and control.
As a kind of preferred version, described circuit of measurement and control successively by analogue selector, difference amplifier andDC-AC-DC circuit connects.
As a kind of preferred version, described display control module comprise CAN bus communication interface, MCU circuit, byKey circuit, display circuit and for giving the power circuit of MCU circuit supply, described MCU circuit passes through CANBus communication interface is connected with master controller, and described key circuit is connected with MCU circuit respectively with display circuit.
As a kind of preferred version, described key circuit comprises 5 buttons, described 5 buttons respectively by draw electricityResistance is connected with 5 GPIO ports of MCU circuit, 15 GPIO ports of described display circuit and MCU circuitConnect.
As a kind of preferred version, described CAN bus communication interface by CAN transceiver, optocoupler, insulating power supply andPeripheral circuit composition.
As a kind of preferred version, described charging socket is by connecting electrical network output 220V electric main, described auxiliary electricalSource circuit output ± 12V, 5V and 36V dc source, wherein ± 12V and 5V dc source are for examining to line voltageSlowdown monitoring circuit, control the power supply of guiding testing circuit and master controller, 36V dc source for to display control module andOther mobile unit power supply; The dc source of described Switching Power Supply accessory power supply output 15.2V, 11.6V and 3.3V,Wherein 15.2V dc source is for powering to AC-DC translation circuit, and 11.6V dc source is used for to DC-AC-DCCircuit supply, 3.3V dc source is for powering to circuit of measurement and control.
Another object of the present invention can be by taking following technical scheme to reach:
The implementation method of the vehicle-mounted charging management system of electric automobile, is characterized in that comprising the following steps:
S1, charging socket connect electrical network, after master controller powers on, initialize;
S2, master controller guide testing circuit to gather the connection state information of charging socket by control, control and draw if havingLead signal, charging socket adopts charging pile socket to connect, and obtains according to controlling pilot signal the specified electricity that socket is allowedStream and the real time charging electric current of allowing; If without controlling pilot signal, charging socket adopts universal power supply socket to connect;
S3, gather line voltage by power grid voltage detection circuit, judge line voltage state;
S4, master controller obtain the battery status information of BMS by CAN bus;
S5, master controller are communicated by letter with man-machine interface, obtain charging modes and charge parameter that man-machine interface is set, andThe information gathering is delivered to man-machine interface and is shown;
The battery status information that S6, basis obtain from BMS judges whether that charging finishes, if completed charging, proceeds toS7; Continue charging if also need, proceed to S8;
S7, the instruction of having charged in man-machine interface, and stop charging, wait for the order of master controller;
Charging modes and charge parameter, charging socket that S8, master controller are set according to battery status, man-machine interface holdPermitted current value and line voltage value and calculated charging voltage and charging current;
The output of S9, main controller controls output rearrangeable switch power supply, charges to battery; And return to step S2 circulation.
The present invention has following beneficial effect with respect to prior art:
1, the charging socket in the vehicle-mounted charging management system of electric automobile of the present invention can adopt charging pile socket and generalSupply socket, has expanded the charging occasion of electric automobile, and be applicable to urban distribution network, urban power grid and rural power grids and use,Really accomplish freely charging of electric automobile, facilitate using and promoting of electric automobile.
2, the vehicle-mounted charging management system of electric automobile of the present invention can be according to user's request, man-machine interface select based onThe charging modes of capacity or time-based charging modes, and relevant charge parameter is set, if electric automobile stopsTime longer, can extend the charging interval, reduce charging current, utilize to extend expensive electrokinetic cell and use the longevityLife is carried out the use cost of low electric automobile.
3, the vehicle-mounted charging management system of electric automobile of the present invention according to user man-machine interface set charging modes andCharge parameter, the line voltage state adopting by master controller and the charged state of battery, calculate safe chargingVoltage and charging current, the variation of self adaptation electrical network voltage, realizes charging freely, will speed up electric automobile popularization andUniversal.
4, the master controller of the vehicle-mounted charging management system of electric automobile of the present invention and the supervision of output rearrangeable switch electric power generating compositionControl system, wherein to adopt single-chip microcomputer to carry out digital control for master controller, output rearrangeable switch power acquisition special controlChip is simulated control, integrated application PFC, ZVS, doubly stream and synchronous rectification, improved power factor (PF),Reduce switching loss and electromagnetic interference, had and control flexibly, the feature that the response time is fast.
Brief description of the drawings
Fig. 1 is the structure principle chart of the vehicle-mounted charging management system of electric automobile of the present invention.
Fig. 2 is the power grid voltage detection circuit structure principle chart of the vehicle-mounted charging management system of electric automobile of the present invention.
Fig. 3 is the control guiding testing circuit structure principle chart of the vehicle-mounted charging management system of electric automobile of the present invention.
Fig. 4 is the output rearrangeable switch power supply architecture schematic diagram of the vehicle-mounted charging management system of electric automobile of the present invention.
Fig. 5 is the display control module structure principle chart of the vehicle-mounted charging management system of electric automobile of the present invention.
Fig. 6 is the man-machine interface schematic diagram that the display control module of the vehicle-mounted charging management system of electric automobile of the present invention is realized.
Fig. 7 is the realization flow figure of the vehicle-mounted charging management system of electric automobile of the present invention.
Detailed description of the invention
Embodiment 1:
As shown in Figure 1, the vehicle-mounted charging management system of the electric automobile of the present embodiment comprises charging socket M100, auxiliary electricalSource circuit M101, power grid voltage detection circuit M102, control guiding testing circuit M103, master controller M104,Output rearrangeable switch power supply M105 and display control module M106, described charging socket 100 can adopt special fillingElectricity stake socket or universal power supply socket (freely charging), described master controller M104 guides testing circuit by controlM103 obtains the connection state information of charging socket 100, if there is control pilot signal, described charging socket 100 adoptsSpecial charging stake socket, if without controlling pilot signal, described charging socket 100 adopts universal power supply socket; Auxiliary electricalThe control chip of source circuit M101 is the single-end ortho-exciting pwm chip FAN4800A with PFC, can obtainHigh power factor and lower total harmonic distortion, in the time that described charging socket 100 connects electrical network, described accessory power supplyCircuit M101 starts, output direct current 36V/2A, ± 12V/0.2A and 5V/0.5A, and wherein 36V power supply is for showing controlMolding piece M106 and other is used for vehicle-carrying equipment, and ± 12V and 5V be for to power grid voltage detection circuit M102, controlTesting circuit M103 and master controller M104 power supply are led in making;
It is STM32F105R8T6 that described master controller M104 adopts single-chip microcomputer, has Cortex-M3 kernel, insideBe integrated with multiple Timer, 16 road ADC, 2 road DAC, 2 road CAN controllers and enough GPIO port are (generalIO port), also pass through I2C bus connects the charging data that EEPROM arranges for storing user, realizes power down and protectsProtect, EEPROM selects AT24C16; When master controller M104 obtains after power supply, start working, by electrical network electricityPressing testing circuit M102 to obtain electrical network real-time voltage value, (is that charging socket 100 adopts general electricity for free chargingSupply socket) time charging control; From BMS, obtain battery capacity, dump energy, battery temperature by CAN busThe information such as degree; Be connected with display control module M106 by CAN bus and realize communication, obtain at display control moduleCharging modes and the charge parameter set in the man-machine interface that M106 realizes, according to all management information systems of obtainingWorking method and running parameter.
Described master controller M104 and output rearrangeable switch power supply M105 composition supervisory control system, master controller M104For digital control, output rearrangeable switch power supply M105 controls for simulation, and master controller M104 arranges output rearrangeable switchThe control mode of power supply M105 is Control of Voltage or Current Control, the setting value of setting voltage and electric current output, withTime the output voltage of rearrangeable switch power supply M105 measured and current feedback to master controller M104, and control showingIn the man-machine interface that module M106 realizes, show to have and control flexibly, the feature that the response time is fast, completes electricity jointlyThe Charge Management of electrical automobile.
As depicted in figs. 1 and 2, described power grid voltage detection circuit M102 comprises micro electric flow pattern voltage transformerM201, differential amplifier circuit M202, the first resistance R 201 and the second resistance R 202, described micro electric flow pattern electricityPress transformer 201 to adopt TV0815-1, its input is connected with electrical network, and output is by differential amplifier circuit M202M104 is connected with master controller; Described the first resistance R 201 is the metalfilmresistor of resistance 165k Ω, power 0.5W,It is connected between micro electric flow pattern voltage transformer M201 and electrical network; Described the second resistance R 202 be resistance 100 Ω,The metalfilmresistor of power 0.25W, it is connected in parallel on micro electric flow pattern voltage transformer M201 and differential amplifier circuitBetween M202; Described differential amplifier circuit M202 amplifies the output voltage of micro electric flow pattern voltage transformer M2017.5 times, and obtain Vpg after translation 1.5V, this Vpg signal is transferred to the ADC of master controller M104, main controlDevice M104 carries out Vpg signal after the continuous sampling of one-period (20 milliseconds), calculates the effective of line voltageValue.
As shown in figures 1 and 3, described control guiding testing circuit M103 comprises voltage follower M301, photoelectricity couplingClose device M302, the 3rd resistance R 301, the 4th resistance R 302, the 5th resistance R 303, the 6th resistance R 304, the 7thResistance R 305, the 8th resistance R 306, the first diode D301 and the second diode D302, described charging socket M100CC end, one end of the 3rd resistance R 301, one end of the 4th resistance R 302 connect respectively voltage follower M301Input, the PE end of described charging socket M100 and the other end of the 4th resistance R 302 are distinguished ground connection; There iing controlWhen pilot signal processed, confirmation signal is controlled in the CP end output of described charging socket M100, and CC end output charging connectsConfirmation signal, PE end is protection ground; The magnitude of voltage of CC end has been determined the connection status of socket; Voltage follower M301Isolated the impact that subsequent conditioning circuit is measured CC terminal voltage, it is exported through the 5th resistance R 303 and the 6th resistance R 304After dividing potential drop, obtain Ipe signal, connect the ADC of master controller M104, master controller M104 obtains the company of socket accordinglyConnect state and cable rated current; The control confirmation signal of CP end is through the first diode D301, the 7th resistance R 305Drive the inner LED of photoelectrical coupler M302, gather the pwm signal of CP end by photoelectrical coupler M302, instituteThe positive pole of stating the second diode D302 connects the input of photoelectrical coupler M302, and minus earth, for clamper M302Voltage when inner LED reverse operation, shields; The 8th resistance R 306 is photoelectrical coupler M302 outputPull-up resistor, photoelectrical coupler M302 simultaneously also plays level conversion, pwm signal is exported to master controllerThe timer input pin of M104, master controller M104 measures the dutycycle of PWM by timer internal, fromAnd the maximum supply current Ipc continuously of acquisition; Described the first diode D301 and the second diode D302 adopt 1N4148,The resistance of the 3rd resistance R 301 is 6k Ω, and the resistance of described the 4th resistance R 302 is 1k Ω, described the 5th resistance R 303Resistance is respectively 3k Ω, and the resistance of described the 6th resistance R 304 is 1k Ω, described the 7th resistance R 305 and the 8th resistanceR306 is the resistance of 3k Ω.
As shown in Figure 1 and Figure 4, described output rearrangeable switch power supply M105 comprise Switching Power Supply accessory power supply M400,There is the AC-DC translation circuit M401 that PFC controls, there is the DC-AC-DC electricity of full-bridge inverting and synchronous rectificationRoad M402 and circuit of measurement and control M403, described AC-DC translation circuit M401 and circuit of measurement and control M403Be connected with DC-AC-DC circuit M402 respectively; Described Switching Power Supply accessory power supply adopts reverse exciting switching voltage regulator and LDOThe topological structure of voltage-stablizer composition, power supply control chip is LNK626, output mutually isolation 15.2V, 11.6V andThe dc source of 3.3V; Direct current 15.2V power supply is for giving the power supply of the AC-DC translation circuit M401 with PFC, instituteThe DC bus-bar voltage of stating AC-DC translation circuit M401 output is made as 400V, adopts UC3855B as main controlChip, has PFC and soft switching function, has improved power factor (PF), has reduced switching loss and electromagnetic interference; Direct current11.6V power supply has full-bridge inverting and synchronous rectification DC-AC-DC circuit M402 for giving powers, described inDC-AC-DC circuit M402 adopt ISL6754 as Master control chip, have the soft switch of ZVS full-bridge inverting andSynchronous rectification, has reduced switching loss, electromagnetic interference and output ripple; Direct current 3.3V power supply is measured control for givingCircuit M403 power supply processed, the voltage measurement part of circuit of measurement and control M403 adopts electric resistance partial pressure measuring voltage, electric currentMeasure portion adopts the in parallel electric current of measuring of the constantan resistance of two 2m Ω, the setting value of the voltage and current of control section byThe DAC output of master controller M104, voltage and current setting value and measured value are by analogue selector 74HCT4052Obtain voltage or current error by difference amplifier afterwards, this error is for the output control of ISL6754, main controlDevice M104, according to the battery charging process information of BMS, selects voltage or the electric current controlled volume as Switching Power Supply.
As shown in Figure 1 and Figure 5, described display control module M106 comprises that power circuit M500, CAN bus are logicalLetter interface 501, MCU circuit M502, key circuit M503 and display circuit M504, described power circuitM500 adopts DC/DC change-over circuit and LDO voltage-stablizer, and DC-DC change-over circuit adopts LT1766-5 conversion chip,Convert the 36V dc source of auxiliary power circuit M101 output to 5V dc source, 5V dc source passes through againLDO voltage-stablizer becomes 3.3V dc source and powers to MCU circuit M502; Described CAN bus communication interface M501Formed by CAN transceiver TJA1040, optocoupler TLP113, insulating power supply DCP020505P and peripheral circuit, realNow with the CAN bus communication of master controller M104 and BMS; Described MCU circuit M502 adopts single-chip microcomputerSTM32F103C6T6, includes CAN controller, and described key circuit M503 comprises 5 film keys, passes throughPull-up resistor is connected with 5 GPIO ports of MCU circuit M502, presses as low level; Described MCU circuit15 GPIO ports of M502 by display circuit M504 connect LCD display (be man-machine interface useDisplay screen), described display circuit M504 comprises backlight control circuit and Concurrent Display interface circuit.
As shown in Figure 6, be the man-machine interface that described display control module M106 realizes, it is arranged on electric automobileInstrument board place, top is 240 × 128 dot matrix LCD displays, below is 5 buttons; LCD display adoptsLM240128R, includes Chinese 16 dot matrix word libraries; 1st～2 row of LCD show charging modes and charge parameter setting,Charging modes has charging modes and the two kinds of selections of time-based charging modes based on capacity, corresponding configurable parameterBe respectively 0.1C～2.0C and 0.1h～20h, C represents battery capacity, h be chronomere (hour); 3rd～4 row are aobviousShow charged state, comprise whether connecting electrical network, whether stop charging, be by measure mode charge or by the timeMode charging etc. 5th～8 row show charging process variable, comprise charging pile charging/free charging, line voltage, fillPiezoelectric voltage, charging current, battery temperature, battery capacity, expectation complete charge time/capacity etc.; User can pass throughButton arranges charging modes and the charge parameter of 1st～2 row, and all the other displaying contents are for to obtain by CAN bus communicationData or the numerical value calculating according to obtained data; When pressing, button is set, the charging modes of the 1st rowAnti-demonstration, at this moment can or reduce button amendment charging modes by increase button, then by confirming that button completes setting,It is invalid to revise not according to confirmation button, again presses when button is set, and the charge parameter of the 2nd row is counter shows, passes throughSame mode comes into force after revising parameter confirmation, and amended parameter is kept at the EEPROM of master controller M104In, startup/pause button is for starting or suspend the work of native system.
As shown in Fig. 1-Fig. 7, the vehicle-mounted charging management system implementation procedure of the electric automobile of the present embodiment is as follows:
Step701, charging socket M100 connect electrical network, after master controller M104 powers on, initialize, and it is fixed to compriseTime the On-Chip peripheral such as device, ADC, DAC and CAN controller initialization, from EEPROM, read running parameter;
Step702, master controller M104 guide testing circuit M103 to gather the company of charging socket M100 by controlConnect status information, if there is control pilot signal, charging socket M100 adopts charging pile socket to connect, according to controlPilot signal is obtained the socket rated current of allowing and the real time charging electric current of allowing; If without controlling pilot signal, fillElectrical socket M100 adopts universal power supply socket to connect, and need to judge according to line voltage;
Step703, by power grid voltage detection circuit M102 gather line voltage, judge line voltage state, compriseThe whether information such as chargeable;
Step704, master controller M104 obtain the battery status information of BMS by CAN bus, comprise residue appearanceAmount, battery temperature, charging voltage and the charging current etc. of allowing;
Step705, master controller M104 communicate by letter with man-machine interface, obtain charging modes and charge parameter, and gatheringInformation deliver to man-machine interface show;
The battery status information that Step706, basis obtain from BMS judges whether that charging finishes, if completed charging,Proceed to Step707; Continue charging if also need, proceed to Step708;
Step707, the instruction of having charged in man-machine interface, and stop charging, wait for the order of master controller;
The charging modes that Step708, master controller M104 set according to battery status, man-machine interface and charge parameter,Charging socket M100 allowable current value and line voltage value, simultaneously according to the control strategy shown in table 1, calculate chargingVoltage and charging current;
Step709, master controller M104 control the output of output rearrangeable switch power supply M105, and battery is charged; AndReturn to step Step702 circulation.
As shown in table 1, front 3 of master controller M104 control decision table is classified constraints as, comprises battery constraint barPart, power constraint condition and user's demand constraint, last 1 row are the control obtaining according to these constraintssStrategy, comprises charging voltage or the charging current of whether charging and needing charging; While adopting universal power supply socket,Line voltage scope is determined according to national standard and actual electric network fluctuation situation, is applicable to cities and towns and rural area. ?Real-Time Monitoring electric network state in charging process, and time update charge power, ensure power grid security, when charge power increasesAdded-time, progressively slowly increase.
The control decision of table 1 master controller
The above be only patent preferred embodiment of the present invention, but the protection domain of patent of the present invention is not limited toThis, be anyly familiar with those skilled in the art in the disclosed scope of patent of the present invention, the patent according to the present inventionTechnical scheme and patent of invention design thereof be equal to and replace or change, all belong to the protection domain of patent of the present invention.
Claims (8)
1. the vehicle-mounted charging management system of electric automobile, is characterized in that: comprise charging socket, auxiliary power circuit, electricityNet voltage detecting circuit, control guiding testing circuit, master controller, output rearrangeable switch power supply and for realizing peopleThe display control module at machine interface, described charging socket is charging pile socket or universal power supply socket; Described charging socketBy connecting electrical network, auxiliary power circuit is produced for guiding testing circuit, master to power grid voltage detection circuit, controlThe dc source of controller and display control module power supply, described power grid voltage detection circuit, control guiding testing circuitBe connected with master controller respectively with output rearrangeable switch power supply, described master controller is controlled mould by CAN bus and demonstrationPiece connects; Described output rearrangeable switch power supply comprises Switching Power Supply accessory power supply, has the AC-DC change that PFC controlsChange circuit, there is DC-AC-DC circuit and the circuit of measurement and control of full-bridge inverting and synchronous rectification, described switch electricitySource accessory power supply adopts the topological structure of reverse exciting switching voltage regulator and LDO voltage-stablizer composition, by connecting charging socket outputFor the dc source to AC-DC translation circuit, DC-AC-DC circuit and circuit of measurement and control power supply, described inAC-DC translation circuit is connected with DC-AC-DC circuit respectively with circuit of measurement and control;
Described power grid voltage detection circuit comprise micro electric flow pattern voltage transformer, differential amplifier circuit, the first resistance withAnd second resistance, the input of described micro electric flow pattern voltage transformer is connected with electrical network, and output passes through differential amplificationCircuit is connected with master controller; Described the first resistance is connected between micro electric flow pattern voltage transformer and electrical network, described inThe second resistance is connected in parallel between micro electric flow pattern voltage transformer and differential amplifier circuit.
2. the vehicle-mounted charging management system of electric automobile according to claim 1, is characterized in that: described control is drawnLead testing circuit and comprise voltage follower, photoelectrical coupler, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th electricityResistance, the 7th resistance, the 8th resistance, the first diode and the second diode, the CC end, the 3rd of described charging socketOne end of resistance, one end of the 4th resistance connect respectively the input of voltage follower, the PE of described charging socket end andThe other end of the 4th resistance is ground connection respectively, and the output of described voltage follower is through the 5th resistance and the 6th electric resistance partial pressureBe connected with master controller afterwards, the CP of described charging socket end is by the first diode and the 7th resistance and photoelectrical couplerInput connects, and the positive pole of described the second diode connects the input of photoelectrical coupler, described the second diode negativeUtmost point ground connection, one end of described the 8th resistance connects the output of photoelectrical coupler.
3. the vehicle-mounted charging management system of electric automobile according to claim 1, is characterized in that: described measurement controlCircuit processed is connected with DC-AC-DC circuit by analogue selector, difference amplifier successively.
4. the vehicle-mounted charging management system of electric automobile according to claim 1, is characterized in that: described demonstration controlMolding piece comprises CAN bus communication interface, MCU circuit, key circuit, display circuit and for to MCUThe power circuit of circuit supply, described MCU circuit is connected with master controller by CAN bus communication interface, described inKey circuit is connected with MCU circuit respectively with display circuit.
5. the vehicle-mounted charging management system of electric automobile according to claim 4, is characterized in that: described button electricityRoad comprises 5 buttons, and described 5 buttons are connected with 5 GPIO ports of MCU circuit by pull-up resistor respectively,Described display circuit is connected with 15 GPIO ports of MCU circuit.
6. the vehicle-mounted charging management system of electric automobile according to claim 4, is characterized in that: described CANBus communication interface is made up of CAN transceiver, optocoupler, insulating power supply and peripheral circuit.
7. the vehicle-mounted charging management system of electric automobile according to claim 1, is characterized in that: described charging is insertedSeat is by connecting electrical network output 220V electric main, described auxiliary power circuit output ± 12V, 5V and 36V direct currentSource, wherein ± 12V and 5V dc source are for guiding testing circuit and main control to power grid voltage detection circuit, controlDevice power supply, 36V dc source is for powering to display control module and other mobile unit; Described Switching Power Supply is auxiliaryThe dc source that helps power supply output 15.2V, 11.6V and 3.3V, wherein 15.2V dc source is for becoming to AC-DCChange circuit supply, 11.6V dc source is used for to DC-AC-DC circuit supply, and 3.3V dc source is measured for givingControl circuit power supply.
8. the implementation method based on the vehicle-mounted charging management system of electric automobile described in claim 1, is characterized in that comprisingFollowing steps:
S1, charging socket connect electrical network, after master controller powers on, initialize;
S2, master controller guide testing circuit to gather the connection state information of charging socket by control, control and draw if havingLead signal, charging socket adopts charging pile socket to connect, and obtains according to controlling pilot signal the specified electricity that socket is allowedStream and the real time charging electric current of allowing; If without controlling pilot signal, charging socket adopts universal power supply socket to connect;
S3, gather line voltage by power grid voltage detection circuit, judge line voltage state;
S4, master controller obtain the battery status information of BMS by CAN bus;
S5, master controller are communicated by letter with man-machine interface, obtain charging modes and charge parameter that man-machine interface is set, andThe information gathering is delivered to man-machine interface and is shown;
The battery status information that S6, basis obtain from BMS judges whether that charging finishes, if completed charging, proceeds toS7; Continue charging if also need, proceed to S8;
S7, the instruction of having charged in man-machine interface, and stop charging, wait for the order of master controller;
Charging modes and charge parameter, charging socket that S8, master controller are set according to battery status, man-machine interface holdPermitted current value and line voltage value and calculated charging voltage and charging current;
The output of S9, main controller controls output rearrangeable switch power supply, charges to battery; And return to step S2 circulation.
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| CN105162204A (en) * | 2015-09-30 | 2015-12-16 | 青岛派克能源有限公司 | New energy vehicle local equalization charging system |
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