CN203951247U - Charging system of electric powercar - Google Patents
Charging system of electric powercar Download PDFInfo
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- CN203951247U CN203951247U CN201420239621.0U CN201420239621U CN203951247U CN 203951247 U CN203951247 U CN 203951247U CN 201420239621 U CN201420239621 U CN 201420239621U CN 203951247 U CN203951247 U CN 203951247U
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Abstract
A kind of charging system of electric powercar, vehicle-mounted charging device comprises that super capacitor discharges and recharges control unit, lithium cell charging control unit and switching circuit, super capacitor discharges and recharges control unit for super capacitor is discharged and recharged to control, in the time that plug access power supply charges, by rectification circuit out-put supply access super capacitor control unit, super capacitor is charged, in the time of described rectification circuit non-transformer output, the control of super capacitor control unit provides rechargeable electrical energy by super capacitor to lithium battery control unit; Switching circuit is arranged at the input of lithium cell charging control unit, switching for super capacitor control unit in charging, electric discharge, its advantage is using ultracapacitor as energy snubber device, when power connection, switching circuit is opened, electrical network charges to super capacitor, and the charging interval, fugitive rate was high, when power supply disconnects, switching circuit closure, super capacitor by storage electric energy transfer to lithium battery.
Description
Technical field
The utility model relates to battery boosting technology field, particularly a kind of charging system of electric powercar.
Background technology
Existing charging system for electric automobile, for the electric automobile that adopts lithium battery, charge efficiency is low mostly, and the charging interval is long, can not be promoted well.
If application number is 201220168795.3, the applying date is on April 20th, 2012, Granted publication day is that the Chinese utility model patent on November 7th, 2012 discloses a kind of pure electric automobile lithium battery charging device, and it comprises two units based on the parallel connection of CAN master slave mode; Two described unit structures are consistent, and the rate of change of output current and voltage is consistent; In unit loop, be provided with active power factor adjustment unit and resonant element.
As shown in the above, the pure electric automobile lithium battery charging device of present stage is focused on active power factor adjustment, and can not meet car owner with filling with the quick charge demand of walking, and causes electric automobile to be difficult to obtain large-scale promotion.
Super capacitor Electric Transit of the prior art or passenger vehicle, adopt the super capacitor storage of electrical energy arranging in bus, drive Vehicle Driving Cycle with electric energy, and provide electric energy to all auxiliary operational outfits of vehicle, charging when it adopts the bus of super capacitor to stop at the station of public transit system, also can be used the AC network power supply in electric power system.Because super capacitor has extraordinary charge acceptance, so in the time of vehicle parking station, by vehicle-mounted quick charger, can complete charging process the times of tens seconds, electric energy supplement is for vehicle continuous service, although adopt ultracapacitor to replace the existing research of charging technique of lithium battery, only adopt ultracapacitor to replace lithium battery also to have defect as energy storing device, such as super capacitor exists electric leakage problem and the excessive problem such as puncture of discharging current.
As shown in the above, current charging system for electric automobile has the following disadvantages, and only adopts lithium battery to carry out the charging interval long, and charge efficiency is low; The problem such as only adopt the charging system of ultracapacitor to exist electric leakage problem and frequent charge to cause to puncture.
Utility model content
The purpose of this utility model is just to provide a kind of charging system of electric powercar that adopts separately lithium battery and the independent defect that adopts ultracapacitor in prior art that solves.
Solution of the present utility model is such:
A kind of charging system of electric powercar, comprise plug and vehicle-mounted charging device, described plug comprises power interface, transformer and rectification circuit, described vehicle-mounted charging device comprises that super capacitor discharges and recharges control unit, lithium cell charging control unit and switching circuit, described super capacitor discharges and recharges control unit for super capacitor is discharged and recharged to control, in the time that described plug access power supply charges, by rectification circuit out-put supply access super capacitor control unit, super capacitor is charged, in the time of described rectification circuit non-transformer output, the control of super capacitor control unit provides rechargeable electrical energy by super capacitor to described lithium battery control unit, described switching circuit is arranged at the input of lithium cell charging control unit, switching for super capacitor control unit in charging, electric discharge, when switching circuit is in the time being switched to electric discharge operating mode, the power delivery of super capacitor control unit output is charged to lithium battery to lithium cell charging control unit.
Technical scheme also comprises more specifically: the switching controls end of described switching circuit is connected with the output of rectification circuit, by the switching controls of rectification circuit output end control switch circuit, the switch terminal of switching circuit is connected respectively to super capacitor and discharges and recharges the output of control unit and the input of lithium current charges control unit.
Further: described super capacitor discharges and recharges control unit and comprises super capacitor, the sampling end of described super capacitor is connected with the detection input of super capacitor voltage detecting circuit, the detection output of super capacitor voltage detecting circuit is connected with the input of BUCK amplifier, the output of BUCK amplifier is connected with the input of BUCK-PWM circuit, the output of BUCK-PWM circuit is connected with the control end of BUCK circuit, and the output of BUCK circuit is connected with a switch terminal of super capacitor and switching circuit.
Further: described lithium cell charging control unit comprises lithium battery, the sampling end of described lithium battery is connected with the detection input of lithium battery voltage testing circuit, the detection output of lithium battery voltage testing circuit is connected with the input of BOOST amplifier, the output of BOOST amplifier (15) is connected with the input of BOOST-PWM circuit, the output of BOOST-PWM circuit is connected with the control end of BOOST circuit, the output of BOOST circuit is connected with lithium battery, and the input of BOOST circuit is connected with a switch terminal of described switching circuit.
Further: described switching circuit is electromagnetic switch.
Further: described BUCK circuit is made up of field effect transistor MOS1, diode D1, Schottky diode S1 and inductance L 1, the source electrode of field effect transistor MOS1 is connected with the backward end of diode D1, the drain electrode of field effect transistor MOS1 is connected with one end of inductance L 1 with the forward end of diode D1, the backward end of Schottky diode S1 respectively, the forward end ground connection of Schottky diode S1, the grid of field effect transistor MOS1 is the control end of BUCK circuit, the source electrode of field effect transistor MOS1 is the input of BUCK circuit, and the other end of inductance L 1 is the output of BUCK circuit, described super capacitor voltage detecting circuit is by resistance R 1, resistance R 2 and amplifier A1 form, wherein one end of resistance R 1 is the detection input of super capacitor voltage detecting circuit, be connected with the positive pole of super capacitor SC, the other end is connected with the forward end of amplifier A1 with one end of resistance R 2 respectively, the other end ground connection of resistance R 2, the backward end of amplifier A1 is connected with output, the output of amplifier A1 is the detection output of super capacitor voltage detecting circuit, be connected with the backward end of amplifier A2, super capacitor voltage detecting circuit is for voltage sampling and be delivered to BUCK amplifier, described BUCK amplifier is made up of amplifier A2, resistance R 3 and resistance R 4, wherein the backward end of amplifier A2 is the input of described BUCK amplifier, resistance R 3 one end are connected with power supply VCC, the other end is connected with one end of resistance R 4 with the forward end of amplifier A2 respectively, the other end ground connection of resistance R 4, the output of amplifier A2 is the output of described BUCK amplifier, is connected with the backward end of amplifier A3, BUCK amplifier is for contrasting sampling voltage and reference voltage, and when sampling voltage does not exceed reference voltage, BUCK amplifier is output as VCC positive voltage, and BUCK-PWM circuit compares sawtooth voltage and VCC, exports the PWM waveform of certain duty ratio, when sampling voltage exceeds reference voltage, it is also VCC that BUCK amplifier is output as the output of 0, BUCK-PWM circuit, and field effect transistor MOS1 turn-offs, and realizes voltage stabilizing charging and controls, described BUCK-PWM electricity routing amplifier A3 and saw-toothed wave generator U3 form, the backward end of amplifier A3 is the input of described BUCK-PWM circuit, the forward end of amplifier A3 is connected with saw-toothed wave generator U3, the output of amplifier A3 is the output of described BUCK-PWM circuit, be connected with the grid of field effect transistor MOS1, BUCK-PWM circuit is according to the break-make of output waveform control field effect transistor MOS1.
Further: described BOOST circuit is by inductance L 2, field effect transistor MOS2, diode D2 and Schottky diode S2 form, wherein one end of inductance L 2 is connected with electromagnetic switch SW as the input of described BOOST circuit, the other end of inductance L 2 is connected with the backward end of diode D2 with the source electrode of field effect transistor MOS2 respectively, the drain electrode of field effect transistor MOS2 is connected with ground wire GND with the forward end of diode D2 respectively, the backward end of Schottky diode S2 is connected with one end of resistance R 5 with the positive pole of lithium battery Li respectively as the output of described BOOST circuit, the grid of field effect transistor MOS2 is connected with the output of amplifier A6 as the control end of described BOOST circuit, described lithium battery voltage testing circuit is made up of resistance R 5, resistance R 6 and amplifier A4, wherein one end of resistance R 5 is connected with the positive pole of lithium battery Li, the other end is connected with the forward end of amplifier A4 with one end of resistance R 6 respectively, the backward end of amplifier A4 is connected with the output of amplifier A4, the output of amplifier A4 is connected with the backward end of amplifier A5 as the output of described lithium battery voltage testing circuit, and lithium battery voltage testing circuit is for voltage sampling and be delivered to BOOST amplifier, described BOOST amplifier is made up of resistance R 7, resistance R 8 and amplifier A5, wherein one end of resistance R 7 is connected with power supply VCC, the other end is connected with the forward end of amplifier A5 with one end of resistance R 8 respectively, the other end ground connection of resistance R 8, the backward end of amplifier A5 is connected with the output of amplifier A4 as the input of described BOOST amplifier, and the output of amplifier A5 is connected with the backward end of amplifier A6 as the output of described BOOST amplifier, BOOST amplifier is for contrasting sampling voltage and reference voltage, when sampling voltage does not exceed reference voltage, BOOST amplifier is output as VCC positive voltage, and BOOST-PWM circuit compares sawtooth voltage and VCC, exports the PWM waveform of certain duty ratio, when sampling voltage exceeds reference voltage, BOOST amplifier is output as 0, BOOST-PWM circuit and is output as VCC, and field effect transistor MOS2 turn-offs, and realizes voltage stabilizing charging and controls, described BOOST-PWM electricity routing amplifier A6 and saw-toothed wave generator U4 form, wherein the backward end of amplifier A6 is connected with the output of amplifier A5 as the input of described BOOST-PWM circuit, wherein the forward end of amplifier A6 is connected with saw-toothed wave generator U4, the output of amplifier A6 is connected as the output of described BOOST-PWM circuit and the grid of MOS2, and BOOST-PWM circuit is according to the break-make of output waveform control field effect transistor MOS2.
Further: described switching circuit is by electromagnetic switch SW, photoelectrical coupler MOC and resistance R 9 form, the DC output end V+ of rectification circuit U2 is connected with the input of BUCK circuit and the 1st pin of photoelectrical coupler MOC respectively, the 2nd pin ground connection of photoelectrical coupler MOC, the 3rd pin of photoelectrical coupler MOC is connected with one end of resistance R 9 with the control end of electromagnetic switch SW respectively, the other end of resistance R 9 is connected with VCC, one end of electromagnetic switch SW is connected with one end of inductance L 1 with the positive pole of super capacitor SC respectively, the DC output end V-ground connection of rectification circuit U2, the minus earth of super capacitor SC.
The utility model has the advantages that when power connection, switching circuit is opened using ultracapacitor as energy snubber device, electrical network charges to super capacitor, charging interval, fugitive rate was high, power supply disconnect time, switching circuit closure, super capacitor by storage electric energy transfer to lithium battery.
Brief description of the drawings
Fig. 1 is system principle diagram of the present utility model.
Fig. 2 is a particular circuit configurations schematic diagram of the present utility model.
Embodiment
Below with reference to the accompanying drawings and embodiment, describe the utility model in detail.
As shown in Figure 1, comprise plug 1 and vehicle-mounted charging device 2, wherein plug 1 comprises power interface 3, transformer 4 and rectification circuit 5, vehicle-mounted charging device 2 comprises by BUCK circuit 6, super capacitor 7, super capacitor voltage detecting circuit 8, BUCK amplifier 9, the super capacitor that BUCK-PWM circuit 10 forms discharges and recharges control unit, switching circuit 11 and by BOOST circuit 12, lithium battery 13, lithium battery voltage testing circuit 14, the lithium cell charging control unit that BOOST amplifier 15 and BOOST-PWM circuit 16 form, power interface 3 is connected with the former limit of transformer 4, the secondary of transformer 4 is connected with the ac input end of rectification circuit 5, the DC output end of rectification circuit 5 is connected with the input of BUCK circuit 6 and the control end of switching circuit 11 respectively, the output of BUCK circuit 6 is connected with one end of ultracapacitor 7 and switching circuit 11 respectively, the sampling end of ultracapacitor 7 is connected with the detection input of super capacitor voltage detecting circuit 8, the detection output of super capacitor voltage detecting circuit 8 is connected with the input of BUCK amplifier 9, the output of BUCK amplifier 9 is connected with the input of BUCK-PWM circuit 10, the output of BUCK-PWM circuit 10 is connected with the control end of BUCK circuit 6, the other end of switching circuit 11 is connected with the input of BOOST circuit 12, the output of BOOST circuit 12 is connected with lithium battery 13, the sampling end of lithium battery 13 is connected with the detection input of lithium battery voltage testing circuit 14, the detection output of lithium battery voltage testing circuit 14 is connected with the input of BOOST amplifier 15, the output of BOOST amplifier 15 is connected with the input of BOOST-PWM circuit 16, the output of BOOST-PWM circuit 16 is connected with the control end of BOOST circuit 12, described switching circuit 11 is electromagnetic switch.
Particularly, as shown in Figure 2, power interface U1 is connected with the former limit of transformer T1, and the secondary of transformer T1 is connected with the ac input end of rectification circuit U2, and the DC output end of rectification circuit U2 is connected with the 1st pin of photoelectrical coupler MOC in the input of BUCK circuit 6 and switching circuit 11 respectively; Described BUCK circuit 6 is made up of field effect transistor MOS1, diode D1, Schottky diode S1 and inductance L 1, the source electrode of field effect transistor MOS1 is connected with the backward end of diode D1, the drain electrode of field effect transistor MOS1 is connected with one end of inductance L 1 with the forward end of diode D1, the backward end of Schottky diode S1 respectively, the forward end ground connection of Schottky diode S1, the grid of field effect transistor MOS1 is the control end of BUCK circuit 6, the source electrode of field effect transistor MOS1 is the input of BUCK circuit 6, and the other end of inductance L 1 is the output of BUCK circuit 6.
Described switching circuit 11 is by electromagnetic switch SW, photoelectrical coupler MOC and resistance R 9 form, the DC output end V+ of rectification circuit U2 is connected with the input of BUCK circuit 6 and the 1st pin of photoelectrical coupler MOC respectively, the 2nd pin ground connection of photoelectrical coupler MOC, the 3rd pin of photoelectrical coupler MOC is connected with one end of resistance R 9 with the control end of electromagnetic switch SW respectively, the other end of resistance R 9 is connected with VCC, one end of electromagnetic switch SW is connected with one end of inductance L 1 with the positive pole of super capacitor SC respectively, the DC output end V-ground connection of rectification circuit U2, the minus earth of super capacitor SC, when power connection, the Light-Emitting Diode conducting in photoelectrical coupler MOC, therefore the sensitization triode in photoelectrical coupler MOC is also in conducting state, the 3rd pin output low level of photoelectrical coupler MOC, switch is in off-state, when power supply access failure, the Light-Emitting Diode in photoelectrical coupler MOC can not conducting, and therefore the sensitization triode in photoelectrical coupler MOC is in cut-off state, and the control end of electromagnetic switch is high level, switch closure.
Described super capacitor voltage detecting circuit 8 is made up of resistance R 1, resistance R 2 and amplifier A1, wherein one end of resistance R 1 is the detection input of super capacitor voltage detecting circuit 8, be connected with the positive pole of super capacitor SC, the other end is connected with the forward end of amplifier A1 with one end of resistance R 2 respectively, the other end ground connection of resistance R 2, the backward end of amplifier A1 is connected with output, the output of amplifier A1 is the detection output of super capacitor voltage detecting circuit 8, is connected with the backward end of amplifier A2.Super capacitor voltage detecting circuit 8 is for voltage sampling and be delivered to BUCK amplifier 9.
Described BUCK amplifier 9 is made up of amplifier A2, resistance R 3 and resistance R 4, wherein the backward end of amplifier A2 is the input of described BUCK amplifier 9, resistance R 3 one end are connected with power supply VCC, the other end is connected with one end of resistance R 4 with the forward end of amplifier A2 respectively, the other end ground connection of resistance R 4; The output of amplifier A2 is the output of described BUCK amplifier 9, is connected with the backward end of amplifier A3; BUCK amplifier 9 is for contrasting sampling voltage and reference voltage, when sampling voltage does not exceed reference voltage, BUCK amplifier 9 is output as VCC positive voltage, and BUCK-PWM circuit 10 compares sawtooth voltage and VCC, exports the PWM waveform of certain duty ratio; When sampling voltage exceeds reference voltage, BUCK amplifier 9 is output as 0, BUCK-PWM circuit 10 and exports also as VCC, and field effect transistor MOS1 turn-offs, and realizes voltage stabilizing charging and controls.
Described BUCK-PWM circuit 10 is made up of amplifier A3 and saw-toothed wave generator U3, the backward end of amplifier A3 is the input of described BUCK-PWM circuit 10, the forward end of amplifier A3 is connected with saw-toothed wave generator U3, the output of amplifier A3 is the output of described BUCK-PWM circuit 10, be connected with the grid of field effect transistor MOS1, BUCK-PWM circuit 10 is according to the break-make of output waveform control field effect transistor MOS1.
Described BOOST circuit 12 is by inductance L 2, field effect transistor MOS2, diode D2 and Schottky diode S2 form, wherein one end of inductance L 2 is connected with electromagnetic switch SW as the input of described BOOST circuit 12, the other end of inductance L 2 is connected with the backward end of diode D2 with the source electrode of field effect transistor MOS2 respectively, the drain electrode of field effect transistor MOS2 is connected with ground wire GND with the forward end of diode D2 respectively, the backward end of Schottky diode S2 is connected with one end of resistance R 5 with the positive pole of lithium battery Li respectively as the output of described BOOST circuit 12, the grid of field effect transistor MOS2 is connected with the output of amplifier A6 as the control end of described BOOST circuit 12.
Described lithium battery voltage testing circuit 14 is made up of resistance R 5, resistance R 6 and amplifier A4, wherein one end of resistance R 5 is connected with the positive pole of lithium battery Li, the other end is connected with the forward end of amplifier A4 with one end of resistance R 6 respectively, the backward end of amplifier A4 is connected with the output of amplifier A4, the output of amplifier A4 is connected with the backward end of amplifier A5 as the output of described lithium battery voltage testing circuit 14, and lithium battery voltage testing circuit 14 is for voltage sampling and be delivered to BOOST amplifier 15.
Described BOOST amplifier 15 is made up of resistance R 7, resistance R 8 and amplifier A5, wherein one end of resistance R 7 is connected with power supply VCC, the other end is connected with the forward end of amplifier A5 with one end of resistance R 8 respectively, the other end ground connection of resistance R 8, the backward end of amplifier A5 is connected with the output of amplifier A4 as the input of described BOOST amplifier 15, and the output of amplifier A5 is connected with the backward end of amplifier A6 as the output of described BOOST amplifier 15; BOOST amplifier 15 is for contrasting sampling voltage and reference voltage, when sampling voltage does not exceed reference voltage, BOOST amplifier 15 is output as VCC positive voltage, and BOOST-PWM circuit 16 compares sawtooth voltage and VCC, exports the PWM waveform of certain duty ratio; When sampling voltage exceeds reference voltage, BOOST amplifier 15 is output as 0, BOOST-PWM circuit 16 and is output as VCC, and field effect transistor MOS2 turn-offs, and realizes voltage stabilizing charging and controls.
Described BOOST-PWM circuit 16 is made up of amplifier A6 and saw-toothed wave generator U4, wherein the backward end of amplifier A6 is connected with the output of amplifier A5 as the input of described BOOST-PWM circuit 16, wherein the forward end of amplifier A6 is connected with saw-toothed wave generator U4, the output of amplifier A6 is connected as the output of described BOOST-PWM circuit 16 and the grid of MOS2, and BOOST-PWM circuit 16 is according to the break-make of output waveform control field effect transistor MOS2.
The components and parts that adopt in embodiment are commercially available prod.
Operation principle of the present utility model is as follows: after the power interface of plug portion switches on power, pass through successively transformer transformation, rectification circuit rectification, BUCK circuit in power supply access vehicle-mounted charging device after rectification, switching circuit open circuit when power connection, BUCK circuit is connected and super capacitor is charged, super capacitor voltage detecting circuit carries out voltage sampling, sampling voltage is sent into BUCK amplifier and reference voltage compares, comparative result is sent into BUCK-PWM circuit, generates the charging of PWM Waveform Control BUCK circuit according to comparative result; When plug portion deenergization, switching circuit closure, BOOST circuit is connected, electric energy in super capacitor shifts to lithium battery by BOOST circuit, lithium battery voltage testing circuit samples the voltage of lithium battery simultaneously, sampling voltage is sent into BOOST amplifier and reference voltage compares, comparative result is sent into BOOST-PWM circuit, generates PWM Waveform Control BOOST circuit lithium battery is charged according to comparative result.
Claims (8)
1. a charging system of electric powercar, comprise plug (1) and vehicle-mounted charging device (2), described plug (1) comprises power interface (3), transformer (4) and rectification circuit (5), it is characterized in that: described vehicle-mounted charging device (2) comprises that super capacitor discharges and recharges control unit, lithium cell charging control unit and switching circuit (11), described super capacitor discharges and recharges control unit for super capacitor is discharged and recharged to control, in the time that described plug access power supply charges, by rectification circuit (5) out-put supply access super capacitor control unit, super capacitor is charged, in the time that described rectification circuit (5) non-transformer is exported, the control of super capacitor control unit provides rechargeable electrical energy by super capacitor to described lithium battery control unit, described switching circuit (11) is arranged at the input of lithium cell charging control unit, switching for super capacitor control unit in charging, electric discharge, when switching circuit (11) is in the time being switched to electric discharge operating mode, the power delivery of super capacitor control unit output is charged to lithium battery to lithium cell charging control unit.
2. charging system of electric powercar according to claim 1, it is characterized in that: the switching controls end of described switching circuit (11) is connected with the output of rectification circuit (5), by the switching controls of rectification circuit (5) output control switch circuit (11), the switch terminal of switching circuit (11) is connected respectively to super capacitor and discharges and recharges the output of control unit and the input of lithium current charges control unit.
3. charging system of electric powercar according to claim 1 and 2, it is characterized in that: described super capacitor discharges and recharges control unit and comprises super capacitor (7), the sampling end of described super capacitor (7) is connected with the detection input of super capacitor voltage detecting circuit (8), the detection output of super capacitor voltage detecting circuit (8) is connected with the input of BUCK amplifier (9), the output of BUCK amplifier (9) is connected with the input of BUCK-PWM circuit (10), the output of BUCK-PWM circuit (10) is connected with the control end of BUCK circuit (6), the output of BUCK circuit (6) is connected with a switch terminal of super capacitor (7) and switching circuit (11).
4. charging system of electric powercar according to claim 1 and 2, it is characterized in that: described lithium cell charging control unit comprises lithium battery (13), the sampling end of described lithium battery (13) is connected with the detection input of lithium battery voltage testing circuit (14), the detection output of lithium battery voltage testing circuit (14) is connected with the input of BOOST amplifier (15), the output of BOOST amplifier (15) is connected with the input of BOOST-PWM circuit (16), the output of BOOST-PWM circuit (16) is connected with the control end of BOOST circuit (12), the output of BOOST circuit (12) is connected with lithium battery (13), the input of BOOST circuit (12) is connected with a switch terminal of described switching circuit (11).
5. charging system of electric powercar according to claim 1 and 2, is characterized in that: described switching circuit (11) is electromagnetic switch.
6. charging system of electric powercar according to claim 3, it is characterized in that: described BUCK circuit (6) is by field effect transistor MOS1, diode D1, Schottky diode S1 and inductance L 1 form, the source electrode of field effect transistor MOS1 is connected with the backward end of diode D1, the drain electrode of field effect transistor MOS1 respectively with the forward end of diode D1, the backward end of Schottky diode S1 is connected with one end of inductance L 1, the forward end ground connection of Schottky diode S1, the grid of field effect transistor MOS1 is the control end of BUCK circuit (6), the source electrode of field effect transistor MOS1 is the input of BUCK circuit (6), the other end of inductance L 1 is the output of BUCK circuit (6), described super capacitor voltage detecting circuit (8) is by resistance R 1, resistance R 2 and amplifier A1 form, wherein one end of resistance R 1 is the detection input of super capacitor voltage detecting circuit (8), be connected with the positive pole of super capacitor SC, the other end is connected with the forward end of amplifier A1 with one end of resistance R 2 respectively, the other end ground connection of resistance R 2, the backward end of amplifier A1 is connected with output, the output of amplifier A1 is the detection output of super capacitor voltage detecting circuit (8), be connected with the backward end of amplifier A2, super capacitor voltage detecting circuit (8) is for voltage sampling and be delivered to BUCK amplifier (9), described BUCK amplifier (9) is made up of amplifier A2, resistance R 3 and resistance R 4, wherein the backward end of amplifier A2 is the input of described BUCK amplifier (9), resistance R 3 one end are connected with power supply VCC, the other end is connected with one end of resistance R 4 with the forward end of amplifier A2 respectively, the other end ground connection of resistance R 4, the output of amplifier A2 is the output of described BUCK amplifier (9), is connected with the backward end of amplifier A3, BUCK amplifier (9) is for contrasting sampling voltage and reference voltage, when sampling voltage does not exceed reference voltage, BUCK amplifier (9) is output as VCC positive voltage, and BUCK-PWM circuit (10) compares sawtooth voltage and VCC, exports the PWM waveform of certain duty ratio, when sampling voltage exceeds reference voltage, it is also VCC that BUCK amplifier (9) is output as 0, BUCK-PWM circuit (10) output, and field effect transistor MOS1 turn-offs, and realizes voltage stabilizing charging and controls, described BUCK-PWM circuit (10) is made up of amplifier A3 and saw-toothed wave generator U3, the backward end of amplifier A3 is the input of described BUCK-PWM circuit (10), the forward end of amplifier A3 is connected with saw-toothed wave generator U3, the output of amplifier A3 is the output of described BUCK-PWM circuit (10), be connected with the grid of field effect transistor MOS1, BUCK-PWM circuit (10) is according to the break-make of output waveform control field effect transistor MOS1.
7. charging system of electric powercar according to claim 4, it is characterized in that: described BOOST circuit (12) is by inductance L 2, field effect transistor MOS2, diode D2 and Schottky diode S2 form, wherein one end of inductance L 2 is connected with electromagnetic switch SW as the input of described BOOST circuit (12), the other end of inductance L 2 is connected with the backward end of diode D2 with the source electrode of field effect transistor MOS2 respectively, the drain electrode of field effect transistor MOS2 is connected with ground wire GND with the forward end of diode D2 respectively, the backward end of Schottky diode S2 is connected with one end of resistance R 5 with the positive pole of lithium battery Li respectively as the output of described BOOST circuit (12), the grid of field effect transistor MOS2 is connected with the output of amplifier A6 as the control end of described BOOST circuit (12), described lithium battery voltage testing circuit (14) is made up of resistance R 5, resistance R 6 and amplifier A4, wherein one end of resistance R 5 is connected with the positive pole of lithium battery Li, the other end is connected with the forward end of amplifier A4 with one end of resistance R 6 respectively, the backward end of amplifier A4 is connected with the output of amplifier A4, the output of amplifier A4 is connected with the backward end of amplifier A5 as the output of described lithium battery voltage testing circuit (14), and lithium battery voltage testing circuit (14) is for voltage sampling and be delivered to BOOST amplifier (15), described BOOST amplifier (15) is made up of resistance R 7, resistance R 8 and amplifier A5, wherein one end of resistance R 7 is connected with power supply VCC, the other end is connected with the forward end of amplifier A5 with one end of resistance R 8 respectively, the other end ground connection of resistance R 8, the backward end of amplifier A5 is connected with the output of amplifier A4 as the input of described BOOST amplifier (15), and the output of amplifier A5 is connected with the backward end of amplifier A6 as the output of described BOOST amplifier (15), BOOST amplifier (15) is for contrasting sampling voltage and reference voltage, when sampling voltage does not exceed reference voltage, BOOST amplifier (15) is output as VCC positive voltage, and BOOST-PWM circuit (16) compares sawtooth voltage and VCC, exports the PWM waveform of certain duty ratio, when sampling voltage exceeds reference voltage, BOOST amplifier (15) is output as 0, BOOST-PWM circuit (16) and is output as VCC, and field effect transistor MOS2 turn-offs, and realizes voltage stabilizing charging and controls, described BOOST-PWM circuit (16) is made up of amplifier A6 and saw-toothed wave generator U4, wherein the backward end of amplifier A6 is connected with the output of amplifier A5 as the input of described BOOST-PWM circuit (16), wherein the forward end of amplifier A6 is connected with saw-toothed wave generator U4, the output of amplifier A6 is connected with the grid of MOS2 as the output of described BOOST-PWM circuit (16), and BOOST-PWM circuit (16) is according to the break-make of output waveform control field effect transistor MOS2.
8. charging system of electric powercar according to claim 5, it is characterized in that: described switching circuit (11) is by electromagnetic switch SW, photoelectrical coupler MOC and resistance R 9 form, the DC output end V+ of rectification circuit U2 is connected with the input of BUCK circuit (6) and the 1st pin of photoelectrical coupler MOC respectively, the 2nd pin ground connection of photoelectrical coupler MOC, the 3rd pin of photoelectrical coupler MOC is connected with one end of resistance R 9 with the control end of electromagnetic switch SW respectively, the other end of resistance R 9 is connected with VCC, one end of electromagnetic switch SW is connected with one end of inductance L 1 with the positive pole of super capacitor SC respectively, the DC output end V-ground connection of rectification circuit U2, the minus earth of super capacitor SC.
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| CN201420239621.0U CN203951247U (en) | 2014-05-12 | 2014-05-12 | Charging system of electric powercar |
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| CN201420239621.0U CN203951247U (en) | 2014-05-12 | 2014-05-12 | Charging system of electric powercar |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106684994A (en) * | 2017-01-03 | 2017-05-17 | 浙江绿源电动车有限公司 | Battery charging-discharging apparatus and electric bicycle |
| CN108155708A (en) * | 2018-02-11 | 2018-06-12 | 深圳市富登科技有限公司 | A kind of wearable electronic equipment power supply method and device |
| CN111682617A (en) * | 2020-06-22 | 2020-09-18 | 深圳市富兰瓦时技术有限公司 | Battery charging and discharging circuit |
| CN112043160A (en) * | 2019-06-05 | 2020-12-08 | 佛山市美的清湖净水设备有限公司 | Instant heating type water dispenser and control method and computer readable storage medium thereof |
-
2014
- 2014-05-12 CN CN201420239621.0U patent/CN203951247U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106684994A (en) * | 2017-01-03 | 2017-05-17 | 浙江绿源电动车有限公司 | Battery charging-discharging apparatus and electric bicycle |
| CN108155708A (en) * | 2018-02-11 | 2018-06-12 | 深圳市富登科技有限公司 | A kind of wearable electronic equipment power supply method and device |
| CN112043160A (en) * | 2019-06-05 | 2020-12-08 | 佛山市美的清湖净水设备有限公司 | Instant heating type water dispenser and control method and computer readable storage medium thereof |
| CN111682617A (en) * | 2020-06-22 | 2020-09-18 | 深圳市富兰瓦时技术有限公司 | Battery charging and discharging circuit |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141119 Termination date: 20170512 |