CN205725091U - Vehicle charger - Google Patents
Vehicle charger Download PDFInfo
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- CN205725091U CN205725091U CN201620184578.1U CN201620184578U CN205725091U CN 205725091 U CN205725091 U CN 205725091U CN 201620184578 U CN201620184578 U CN 201620184578U CN 205725091 U CN205725091 U CN 205725091U
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- 238000001514 detection method Methods 0.000 claims abstract description 54
- 230000001360 synchronised effect Effects 0.000 claims abstract description 35
- 238000001914 filtration Methods 0.000 claims abstract description 23
- 238000013021 overheating Methods 0.000 claims abstract description 13
- 238000004804 winding Methods 0.000 claims description 51
- 230000000087 stabilizing effect Effects 0.000 claims description 22
- 239000003990 capacitor Substances 0.000 claims description 20
- 238000005070 sampling Methods 0.000 claims description 13
- 230000001568 sexual effect Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 4
- 206010020843 Hyperthermia Diseases 0.000 abstract description 2
- 230000036031 hyperthermia Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 239000011324 bead Substances 0.000 description 3
- 101100503482 Arabidopsis thaliana FTSH5 gene Proteins 0.000 description 2
- 101150082136 VAR1 gene Proteins 0.000 description 2
- 101100100146 Candida albicans NTC1 gene Proteins 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
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Classifications
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- H02J7/027—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/0071—Regulation of charging or discharging current or voltage with a programmable schedule
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- H02J2007/10—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
This utility model provides a kind of vehicle charger, including: MCU, input filter circuit, current rectifying and wave filtering circuit, input voltage detection circuit, overheating detection circuit, power control circuit, isolating transformer T1, secondary power supply circuits, circuit of synchronous rectification, output filter circuit, output and reverse-connection protection circuit, output voltage detecting circuit, overvoltage crowbar, output current detection circuit, current foldback circuit, feedback control circuit, overheating detection circuit, battery temperature testing circuit；This utility model provide comprehensive defencive function: input overvoltage protection, outfan overvoltage, cross stream, short-circuit protection, output polarity reverse connecting protection, and charger hyperthermia and superheating protection, it is possible to prolongation battery.
Description
Technical field
This utility model relates to a kind of vehicular equipment, especially a kind of vehicle charger.
Background technology
Automobile is as Private Traffic instrument at present, and more and more universal, automobile pollution increases year by year.It is typically due to people and drives apart from shorter, frequent start-stop, and automobile self charging modes is simple, charge parameter cannot be regulated under condition of different temperatures, cause accumulator not operate in perfect condition for a long time, shorten dramatically service life, typically can only use 2～3 years, the most economical impaired, cause also great destruction to environment.
High-quality vehicle charger is used to carry out safeguarding the life-span that charging is directly connected to storage battery; if the protection circuit of charger is perfect; then can realize over-voltage over-current protection, and protection to error-polarity connection can be provided when charger connects storage battery error connection, it is ensured that use safety.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, it is provided that a kind of vehicle charger, various protection circuits and protection mechanism are perfect, peculiar interpolation charging voltage temperature-compensating；Can effectively extend the storage battery life-span.The technical solution adopted in the utility model is:
A kind of vehicle charger, including: MCU, input filter circuit, current rectifying and wave filtering circuit, input voltage detection circuit, overheating detection circuit, power control circuit, isolating transformer T1, secondary power supply circuits, circuit of synchronous rectification, output filter circuit, output and reverse-connection protection circuit, output voltage detecting circuit, overvoltage crowbar, output current detection circuit, current foldback circuit, feedback control circuit；
The input termination alternating current of input filter circuit, output termination current rectifying and wave filtering circuit；The output termination power control circuit of current rectifying and wave filtering circuit；Input voltage detection circuit is from the rectification output end monitoring voltage HV1 of current rectifying and wave filtering circuit and feeds back corresponding signal to MCU；Key element or the temperature at position feed back to MCU in overheating detection circuit detection charger；Power control circuit is connected with isolating transformer T1 primary side winding；The vice-side winding of isolating transformer T1 connects secondary power supply circuits and circuit of synchronous rectification；The output termination output filter circuit of circuit of synchronous rectification；The output termination output of output filter circuit and reverse-connection protection circuit；Output and reverse-connection protection circuit connect accumulator by output lead；
Overheating detection circuit includes: include resistance R99, critesistor NTC3；Resistance R99 mono-termination voltage VDD, another terminates critesistor NTC3 one end, and another termination secondary ground of output detections signal Vtemp1 to MCU, critesistor NTC3；Critesistor NTC3 is arranged in circuit of synchronous rectification (16) on the radiator of NMOS tube Q3；
The input termination output filter circuit outfan of feedback control circuit carries out voltage sample, and the voltage control signal Vset simultaneously exported by MCU controls；The output termination power control circuit of feedback control circuit, completes closed loop control；
The input of output voltage detecting circuit terminates the voltage Vo of output filter circuit output and/or exports the voltage+Batt with reverse-connection protection circuit outfan, and the voltage signal of collection is fed back to MCU；MCU connects overvoltage crowbar, and overvoltage crowbar connects power control circuit；
Current signal in output current detection circuit detection circuit of synchronous rectification outfan loop, feeds back to MCU, and feeds back to current foldback circuit simultaneously；Current foldback circuit connects power control circuit；
Output provides charger output polarity reverse connecting protection with reverse-connection protection circuit, and is simultaneously connected with MCU, feeds back the accumulator pole sexual state connected to MCU；
MCU, according to each input signal, is charged device input overvoltage protection, outfan overvoltage, overcurrent protection, output polarity reverse connecting protection, and the control of charger overtemperature protection.
Further, input voltage detection circuit includes resistance R12, R17, R205, Zener diode ZD205, optocoupler U3；Current rectifying and wave filtering circuit rectification output end voltage HV1 connecting resistance R12 one end, another termination Zener diode ZD205 negative electrode of resistance R12, and connect ground, former limit by resistance R17；Zener diode ZD205 anode connects optocoupler U3 input anode, and U3 input negative electrode connects ground, former limit；Optocoupler U3 outfan colelctor electrode meets positive voltage VDD by pull-up resistor R205, and to MCU output signal AC-OK；The outfan emitter stage of optocoupler U3 connects secondary ground.
Further, power control circuit includes power supply chip IC1, power tube Q2, critesistor NTC2, the outfan U1B of optocoupler U1, the outfan U10B of optocoupler U101；
Current rectifying and wave filtering circuit positive output termination capacitor C12 and one end of resistance R9 and main winding T1A one end, isolating transformer T1 former limit；Another terminating diode D8 negative electrode of electric capacity C12 and resistance R9, diode D8 anode connects the former limit main winding T1A other end and power tube Q2 drain electrode；Electric capacity C11 is connected in parallel on drain electrode and the source electrode of Q2；Source electrode connecting resistance R13 one end of power tube Q2 also connects ground, former limit by sampling resistor R15；The sampling end of resistance R13 another termination power supply chip IC1 also connects former limit by electric capacity C10；One end of drive end connecting resistance R8 of power supply chip IC1, the base stage of PNP triode Q1；The emitter stage connecting resistance R8 other end, the grid of power tube Q2 and resistance R14 one end of audion Q1；The colelctor electrode connecting resistance R14 other end of audion Q1 and the source electrode of power tube Q2；
The former limit of isolating transformer T1 power winding T1C one termination former limit ground, another termination High frequency filter element B2 one end, the anode of another terminating diode D5 of High frequency filter element B2, electric capacity C17 one end；The other end of electric capacity C17 connects negative electrode and resistance R128 one end of diode D5 by resistance R129；Another terminating diode D2 anode of resistance R128, Zener diode D10 negative electrode and electric capacity C4 one end, another ground, termination former limit of electric capacity C4；Diode D2 negative electrode connects the power end of power supply chip IC1 and connects ground, former limit by electric capacity C6；The power end of IC1 connects current rectifying and wave filtering circuit positive output end also by resistance R3；The anode of Zener diode D1 connects the voltage detecting end of power supply chip IC1, resistance R16 one end, electric capacity C3 one end；The resistance R16 other end connects ground, former limit by the critesistor NTC2 of negative temperature coefficient；Another of electric capacity C3 terminates ground, former limit；The timing capacitor external connection end of power supply chip IC1 connects ground, former limit by electric capacity C8；IC1 ground connection terminates ground, former limit；
Zero current detection terminating resistor R6 one end, diode D3 negative electrode, electric capacity C7 and resistance R5 one end of power supply chip IC1, diode D4 anode；Electric capacity C7 and the resistance R5 other end, diode D4 negative electrode connect ground, former limit；Resistance R6 another terminating diode D3 anode and resistance R7 one end；One end of another termination isolating transformer T1 former limit of resistance R7 auxiliary winding T1D, another ground, termination former limit of former limit auxiliary winding T1D；
One end of feedback termination capacitor C9 of power supply chip IC1, the outfan U1B colelctor electrode of optocoupler U1 and the outfan U10B colelctor electrode of optocoupler U101；The outfan U10B emitter stage of the other end of electric capacity C9, the outfan U1B emitter stage of optocoupler U1 and optocoupler U101 connects ground, former limit.
Further, critesistor NTC2 is arranged on by power tube Q2 in the circuit board.
Further, circuit of synchronous rectification includes electric capacity C18, C190, C16, resistance R18, R24, R10, R120, R125, R126, NMOS tube Q3, synchronous rectification chip IC 2；IC2 samples NCP4304B；
Output filter circuit includes electric capacity C93, C97, C29, C28, inductance filter L5；
One end output voltage VS of isolating transformer secondary main winding T1E, connects one end and the inductance filter L5 first input end of electric capacity C93, C97；Inductance filter L5 the second input connecting resistance R34 one end, another termination secondary ground of the resistance R34 other end, electric capacity C93 and C97；Another termination capacitor C190 of secondary main winding T1E, C18 one end, the drain electrode of NMOS tube Q3 and resistance R120 one end；Electric capacity C190 another termination Q3 source electrode and resistance R24 one end and secondary ground；The electric capacity C18 other end connects NMOS tube Q3 source electrode and secondary ground by resistance R18；Another termination NMOS tube Q3 grid of resistance R24 also connects the drive end of synchronous rectification chip IC 2 by resistance R10；The sampling end connecting resistance R120 other end of synchronous rectification chip IC 2；The power supply termination voltage VS of synchronous rectification chip IC 2, and connect secondary ground by electric capacity C16；The ground connection termination secondary ground of IC2；The maximum service time of IC2 sets end and minimum service time sets end and connects secondary ground by resistance R126 and R125 respectively；
The first outfan output voltage Vo of inductance filter L5, the second outfan is as the negative output terminal of vehicle charger；Electric capacity C29 and C28 is in parallel with the two of inductance filter L5 outfans.
Further, secondary power supply circuits include that the secondary of isolating transformer T1 is powered winding T1B, High frequency filter element B3 (B3 specifically uses magnetic bead), diode D10, D7, D12, D9, resistance R104, R198, electric capacity C78, C73, C5, C108；Voltage stabilizing chip U402, U9, electric capacity C27, C39, C61 and C31；
Secondary power winding T1B one termination secondary ground, another termination High frequency filter element B3 one end, the anode of another terminating diode D10 and D7 of B3, one end of resistance R104；The other end of resistance R104 connects the negative electrode of diode D10 and D7, and one end of electric capacity C73 and C5, one end of resistance R198 by electric capacity C78；The negative electrode output voltage Vp of diode D10 and D7；Another termination secondary ground of electric capacity C73 and C5；Another terminating diode D12 anode of resistance R198, diode D12 negative electrode connects diode D9 negative electrode and electric capacity C108 one end；Another termination secondary ground of electric capacity C108；Diode D9 anode meets the output voltage VS of isolating transformer secondary main winding T1E one end；The negative electrode output voltage VCCS of diode D9；
Voltage VCCS is connected to electric capacity C27 and C39 one end and voltage stabilizing chip U402 input；Another termination secondary ground of electric capacity C27 and C39；Voltage stabilizing chip U402 adjusts termination secondary ground, the outfan output voltage Vdd5 of voltage stabilizing chip U402；The one termination outfan of U402 of electric capacity C61 and the input of voltage stabilizing chip U9 and Enable Pin, another termination secondary ground of electric capacity C61；The ground connection termination secondary ground of voltage stabilizing chip U9, output termination capacitor C31 one end output voltage VDD；Another termination secondary ground of electric capacity C31.
Further, output and reverse-connection protection circuit include relay R T1, diode D22, D14, D15, NPN audion Q5, fuse F2, resistance R137, R138, R46, R43, R47, R127；
The switch one of relay R T1 terminates the voltage Vo of output filter circuit 17 output, other end output voltage+Batt, and relay R T1 switchs another termination fuse F2 one end and diode D15 negative electrode, and the fuse F2 other end is as the positive output end of charger；The negative electrode of the one terminating diode D22 of resistance R137 and R138 and voltage Vp, the anode of diode D22 meets voltage VCCS；Voltage Vp by secondary power winding T1B output through diode rectification obtain；Voltage VCCS is by one end output voltage VS of secondary main winding T1E through diode D9, and voltage Vp compares gained after resistance R198 and diode D12；Other end contact relay RT1 coil one end of resistance R137 and R138, diode D14 negative electrode also connects secondary ground by electric capacity C115；Relay R T1 coil another terminating diode D14 anode and audion Q5 colelctor electrode；Base stage connecting resistance R46 one end, R47 one end and R127 one end of audion Q5, and by resistance R43 with connecing secondary and Q5 emitter stage；Resistance R46 another terminating diode D15 anode；Resistance R47 receives control signal Vrelay that MCU sends；The resistance R127 other end feeds back a voltage feedback signal Rev_Protect representing charger outfan connected accumulator pole sexual state to MCU.
Further, feedback control circuit includes resistance R31, R25, R22, R26, R20, R21, reference voltage source U2, the input U1A of optocoupler U1, diode D102；
Resistance R31 one end receives the voltage control signal Vset that MCU sends, and another terminates the adjustable side of reference voltage source U2, one end of resistance R25, one end of R26, one end of electric capacity C19 and C197；Resistance R25 another termination voltage Vo；The anode of another termination U2 of resistance R26 and secondary ground；One end of electric capacity C19 other end connecting resistance R22, another termination capacitor C197 other end of resistance R22 and the negative electrode of reference voltage stabilizing source U2；Negative electrode connecting resistance R21 one end of U2 and the negative electrode of optocoupler U1 input U1A, the anode of another termination optocoupler U1 input U1A of resistance R1 and one end of resistance R20, another terminating diode D102 negative electrode of resistance R20, diode D102 anode meets voltage VCCS；Voltage Vo is from the output of output filter circuit 17；Voltage VCCS is by one end output voltage VS of secondary main winding T1E through diode D9, and voltage Vp compares gained after resistance R198 and diode D12；Voltage Vp by secondary power winding T1B output through diode rectification obtain.
Further, output current detection circuit includes resistance R34, R82, R135, R119, and an amplifying circuit；Resistance R34 is arranged in circuit of synchronous rectification 16 outfan loop, a termination secondary ground, other end connecting resistance R82 one end；The input of another termination amplifying circuit of resistance R82；The outfan of amplifying circuit by resistance R135 to MCU feedback signal Ioc, by resistance R119 output signal Iout；
Current foldback circuit includes resistance R404, R405, R401, R403, electric capacity C68, C21, diode D11, operational amplifier U5A, NPN audion Q402, the input U10A of optocoupler U101；Resistance R404 mono-termination voltage Vdd5, another terminates the reverse input end of operational amplifier U5A, diode D11 anode, and connects secondary ground by electric capacity C68, resistance R405；The signal Ioc of output current detection circuit 21 output is connected to the in-phase input end of operational amplifier U5A；Electric capacity one terminates U5A in-phase input end, another termination secondary ground；The output of operational amplifier U5A terminates audion Q402 base stage and connects secondary ground by resistance R401；The emitter stage of audion Q402 connects secondary ground, and colelctor electrode connects diode D11 negative electrode and the negative electrode of optocoupler U10 input U10A, and the anode of optocoupler U10 input U10A meets voltage VCCS by resistance；
Output voltage detecting circuit includes resistance R39, R40, R44, R45；Resistance R39 mono-terminates the voltage Vo of output filter circuit 17 output, one end of other end connecting resistance R40, and output signal Vout to MCU；Another termination secondary ground of resistance R40；The one termination output of resistance R44 and the voltage+Batt of reverse-connection protection circuit 18 outfan, one end of other end connecting resistance R45, and output signal Vbatt to MCU；Another termination secondary ground of resistance R45；
Overvoltage crowbar includes NPN audion Q401, resistance R402；The one of resistance R402 terminates the base stage of audion Q401 and receives control signal OVP of MCU output；Another termination secondary ground of resistance R402；The emitter stage of audion Q401 connects secondary ground, and colelctor electrode connects the negative electrode of optocoupler U10 input U10A.
Further, also including a battery temperature testing circuit, battery temperature testing circuit includes resistance R100, inductance filter L201, joint JP505, and a critesistor being arranged in accumulator；Critesistor in accumulator connects inductance filter L201 input by joint JP505；One the output termination secondary ground of inductance filter L201, another outfan meets voltage VDD, and output detections signal Vtemp2 to MCU by resistance R100.
The utility model has the advantage of:
1) comprehensive defencive function can be provided: input overvoltage protection, outfan overvoltage, excessively stream, short-circuit protection, output polarity reverse connecting protection, and the protection of charger hyperthermia and superheating.
2) relatively low dash current limits, and uses temperature range wide :-35 DEG C～+50 DEG C.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model.
Fig. 2 is major part circuit diagram of the present utility model.
Fig. 3 is input voltage detection circuit schematic diagram of the present utility model.
Fig. 4 is secondary power supply circuits Part II schematic diagram of the present utility model.
Fig. 5 is current foldback circuit of the present utility model and overvoltage crowbar schematic diagram.
Fig. 6 is overheating detection circuit schematic diagram of the present utility model.
Fig. 7 is battery temperature testing circuit schematic diagram of the present utility model.
Detailed description of the invention
Below in conjunction with concrete drawings and Examples, the utility model is described in further detail.
A kind of vehicle charger that the utility model proposes, as it is shown in figure 1, include:
MCU, input filter circuit 10, current rectifying and wave filtering circuit 11, input voltage detection circuit 12, overheating detection circuit 13, power control circuit 14, isolating transformer T1, secondary power supply circuits 15, circuit of synchronous rectification 16, output filter circuit 17, output and reverse-connection protection circuit 18, output voltage detecting circuit 19, overvoltage crowbar 20, output current detection circuit 21, current foldback circuit 22, feedback control circuit 23, battery temperature testing circuit 24；Overheating detection circuit；
The input termination alternating current of input filter circuit 10, output termination current rectifying and wave filtering circuit 11；The output termination power control circuit 14 of current rectifying and wave filtering circuit 11；Input voltage detection circuit 12 is from the rectification output end monitoring voltage HV1 of current rectifying and wave filtering circuit 11 and feeds back corresponding signal to MCU；Overheating detection circuit 13 detects in charger key element or the temperature at position and feeds back to MCU；Power control circuit 14 is connected with isolating transformer T1 primary side winding；The vice-side winding of isolating transformer T1 connects secondary power supply circuits 15 and circuit of synchronous rectification 16；The output termination output filter circuit 17 of circuit of synchronous rectification 16；Output termination output and the reverse-connection protection circuit 18 of output filter circuit 17；Output and reverse-connection protection circuit 18 connect accumulator by output lead；Battery temp is detected and feeds back to MCU by battery temperature testing circuit 24；
Input termination output filter circuit 17 outfan of feedback control circuit 23 carries out voltage sample, the voltage control signal Vset simultaneously exported by MCU controls, Vset is an analog output voltage, and the size of its value can affect charger final output voltage size；The output termination power control circuit 14 of feedback control circuit 23, completes closed loop control；
The input of output voltage detecting circuit 19 terminates the voltage Vo of output filter circuit 17 output and/or exports the voltage+Batt with reverse-connection protection circuit 18 outfan, and the voltage signal of collection is fed back to MCU；MCU connects overvoltage crowbar 20, and overvoltage crowbar 20 connects power control circuit 14；
Output current detection circuit 21 detects the current signal in circuit of synchronous rectification 16 outfan loop, feeds back to MCU, and feeds back to current foldback circuit 22 simultaneously；Current foldback circuit 22 connects power control circuit 14；
Output and reverse-connection protection circuit 18 provide charger output polarity reverse connecting protection, and are simultaneously connected with MCU, feed back the accumulator pole sexual state connected to MCU；
MCU, according to each input signal, is charged device input overvoltage protection, outfan overvoltage, overcurrent protection, output polarity reverse connecting protection, and the control of charger overtemperature protection.
Photoelectrical coupler in the application electrical schematic diagram is referred to as optocoupler, hereby illustrates.
Input filter circuit 10 as shown in Figure 2, including fuse F1, critesistor NTC1 and NTC6, varistor VAR1, resistance R1, R2, safety electric capacity CX1, CX2；Inductance filter L101；Critesistor NTC6 limits dash current, and varistor VAR1 is used for voltage peak absorbing；Inductance filter L101 and electric capacity CX1, CX2 decay electromagnetic interference signal.Electric capacity C101 connects shell use, and electric capacity C112 is earthy.
Current rectifying and wave filtering circuit 11 as shown in Figure 2, including rectifier bridge DB1 and electric capacity C2, C102, inductance L10；The positive output end output voltage HV1 of rectifier bridge DB1；Inductance L10 and electric capacity C2, C102 are connected into π type low pass filter；Low pass filter output voltage HV；
Input voltage detection circuit 12 is as it is shown on figure 3, include resistance R12, R17, R205, Zener diode ZD205, optocoupler U3；Current rectifying and wave filtering circuit 11 rectification output end voltage HV1 connecting resistance R12 one end, another termination Zener diode ZD205 negative electrode of resistance R12, and connect ground, former limit by resistance R17；Zener diode ZD205 anode connects optocoupler U3 input anode, and U3 input negative electrode connects ground, former limit；Optocoupler U3 outfan colelctor electrode meets positive voltage VDD by pull-up resistor R205, and to MCU output signal AC-OK；The outfan emitter stage of optocoupler U3 connects secondary ground.Wherein positive voltage VDD is from an output of secondary power supply circuits 15；When input ac voltage is too high; voltage HV1 also uprises; optocoupler U3 can turn on; signal AC-OK can change; after the input I/O mouth of MCU detects, MCU exports control signal Vrelay step-down so that output and the audion Q5 cut-off in reverse-connection protection circuit 18; relay R T1 disconnects, and cuts off the output of vehicle charger.
Power control circuit 14 is as in figure 2 it is shown, include power supply chip IC1, power tube Q2, critesistor NTC2, the outfan U1B of optocoupler U1, the outfan U10B of optocoupler U101；Power supply chip IC1 uses NCP1380, and 1 foot is zero current detection end, and 2 feet are feedback end, 3 feet are sampling end, and 4 feet are earth terminal, and 5 feet are drive end, 6 feet are power end, and 7 feet are voltage monitoring end, and 8 feet are timing capacitor (Timing Capacitor) external connection end；Power tube Q2 is NMOS tube；
Current rectifying and wave filtering circuit 11 positive output termination capacitor C12 and one end of resistance R9 and main winding T1A one end, isolating transformer T1 former limit；Another terminating diode D8 negative electrode of electric capacity C12 and resistance R9, diode D8 anode connects the former limit main winding T1A other end and power tube Q2 drain electrode；Electric capacity C11 is connected in parallel on drain electrode and the source electrode of Q2；Source electrode connecting resistance R13 one end of power tube Q2 also connects ground, former limit by sampling resistor R15；The sampling end of resistance R13 another termination power supply chip IC1 also connects former limit by electric capacity C10；One end of drive end connecting resistance R8 of power supply chip IC1, the base stage of PNP triode Q1；The emitter stage connecting resistance R8 other end, the grid of power tube Q2 and resistance R14 one end of audion Q1；The colelctor electrode connecting resistance R14 other end of audion Q1 and the source electrode of power tube Q2；
The former limit of isolating transformer T1 power winding T1C one termination former limit ground, another termination High frequency filter element B2 one end, the anode of another terminating diode D5 of High frequency filter element B2, electric capacity C17 one end；In this example, B2 uses magnetic bead, may filter that high frequency is spuious；The other end of electric capacity C17 connects negative electrode and resistance R128 one end of diode D5 by resistance R129；Another terminating diode D2 anode of resistance R128, Zener diode D10 negative electrode and electric capacity C4 one end, another ground, termination former limit of electric capacity C4；Diode D2 negative electrode connects the power end of power supply chip IC1 and connects ground, former limit by electric capacity C6；The power end of IC1 connects current rectifying and wave filtering circuit 11 positive output end also by resistance R3；The anode of Zener diode D1 connects the voltage detecting end of power supply chip IC1, resistance R16 one end, electric capacity C3 one end；The resistance R16 other end connects ground, former limit by the critesistor NTC2 of negative temperature coefficient；Another of electric capacity C3 terminates ground, former limit；The timing capacitor external connection end of power supply chip IC1 connects ground, former limit by electric capacity C8；IC1 ground connection terminates ground, former limit；Critesistor NTC2 can play superheat protecting function, and critesistor NTC2 is arranged on by power tube Q2 in the circuit board；When there is superheating phenomenon, NTC2 resistance decrease, the voltage that 7 feet of power supply chip IC 1 detect can exceed allowed band, causes power supply chip IC1 real-time guard action, and such as 5 feet can control temporary transient switch-off power pipe Q2；By resistance R3 power taking when power supply chip IC1 starts, powered by the former limit winding T1C that powers after normal work；
Zero current detection terminating resistor R6 one end, diode D3 negative electrode, electric capacity C7 and resistance R5 one end of power supply chip IC1, diode D4 anode；Electric capacity C7 and the resistance R5 other end, diode D4 negative electrode connect ground, former limit；Resistance R6 another terminating diode D3 anode and resistance R7 one end；One end of another termination isolating transformer T1 former limit of resistance R7 auxiliary winding T1D, another ground, termination former limit of former limit auxiliary winding T1D；Former limit auxiliary winding T1D is that current over-zero detection is used；
One end of feedback termination capacitor C9 of power supply chip IC1, the outfan U1B colelctor electrode of optocoupler U1 and the outfan U10B colelctor electrode of optocoupler U101；The outfan U10B emitter stage of the other end of electric capacity C9, the outfan U1B emitter stage of optocoupler U1 and optocoupler U101 connects ground, former limit；The input of optocoupler U1, at feedback control circuit 23, is hereinafter introduced；The input of optocoupler U101, in overvoltage crowbar 20, is hereinafter introduced；
Circuit of synchronous rectification 16, output filter circuit 17 are as shown in Figure 2；Circuit of synchronous rectification 16 includes electric capacity C18, C190, C16, resistance R18, R24, R10, R120, R125, R126, NMOS tube Q3, synchronous rectification chip IC 2；IC2 samples NCP4304B；Output filter circuit 17 includes electric capacity C93, C97, C29, C28, inductance filter L5；Resistance R34 is the sampling resistor of output current detection circuit 21；IC2 uses NCP4304B, 1 foot is power end, 2 feet (Toff) are maximum service time to set end, 3 feet (Ton) are minimum service time to set end, and 4 feet are logic control end (useless in this example arrive, directly connect secondary ground), 5 feet are sampling end, 6 feet are for compensating end, and 7 feet are earth terminal, and 8 feet are drive end；
One end output voltage VS of isolating transformer secondary main winding T1E, connects one end and the inductance filter L5 first input end of electric capacity C93, C97；Inductance filter L5 the second input connecting resistance R34 one end, another termination secondary ground of the resistance R34 other end, electric capacity C93 and C97；Another termination capacitor C190 of secondary main winding T1E, C18 one end, the drain electrode of NMOS tube Q3 and resistance R120 one end；Electric capacity C190 another termination Q3 source electrode and resistance R24 one end and secondary ground；The electric capacity C18 other end connects NMOS tube Q3 source electrode and secondary ground by resistance R18；Another termination NMOS tube Q3 grid of resistance R24 also connects the drive end of synchronous rectification chip IC 2 by resistance R10；The sampling end connecting resistance R120 other end of synchronous rectification chip IC 2；The power supply termination voltage VS of synchronous rectification chip IC 2, and connect secondary ground by electric capacity C16；The ground connection termination secondary ground of IC2；The maximum service time of IC2 sets end and minimum service time sets end and connects secondary ground by resistance R126 and R125 respectively；In order to increase output electric current, in this example, secondary main winding is two, i.e. T1E and T1F of Parallel opertation；
The first outfan output voltage Vo of inductance filter L5, the second outfan, as the negative output terminal of vehicle charger, is used for connecting battery terminal negative；Electric capacity C29 and C28 is in parallel with the two of inductance filter L5 outfans；
Secondary power supply circuits 15 as shown in figs. 2 and 4, are the Part I of secondary power supply circuits 15 in Fig. 2, are the Part II of secondary power supply circuits 15 in Fig. 4；
Secondary power supply circuits 15 include that the secondary of isolating transformer T1 is powered winding T1B, High frequency filter element B3 (B3 specifically uses magnetic bead), diode D10, D7, D12, D9, resistance R104, R198, electric capacity C78, C73, C5, C108；Voltage stabilizing chip U402, U9, electric capacity C27, C39, C61 and C31；Voltage stabilizing chip U402, U9 are respectively adopted AZ1117 and NCP551SN33T1G；
Secondary power winding T1B one termination secondary ground, another termination High frequency filter element B3 one end, the anode of another terminating diode D10 and D7 of B3, one end of resistance R104；The other end of resistance R104 connects the negative electrode of diode D10 and D7, and one end of electric capacity C73 and C5, one end of resistance R198 by electric capacity C78；The negative electrode output voltage Vp of diode D10 and D7；Another termination secondary ground of electric capacity C73 and C5；Another terminating diode D12 anode of resistance R198, diode D12 negative electrode connects diode D9 negative electrode and electric capacity C108 one end；Another termination secondary ground of electric capacity C108；Diode D9 anode meets the output voltage VS of isolating transformer secondary main winding T1E one end；The negative electrode output voltage VCCS of diode D9；
Voltage VCCS is connected to electric capacity C27 and C39 one end and voltage stabilizing chip U402 input；Another termination secondary ground of electric capacity C27 and C39；Voltage stabilizing chip U402 adjusts termination secondary ground, and the outfan output voltage Vdd5 of voltage stabilizing chip U402, the value of Vdd5 is+5v；The one termination outfan of U402 of electric capacity C61 and the input of voltage stabilizing chip U9 and Enable Pin, another termination secondary ground of electric capacity C61；The ground connection termination secondary ground of voltage stabilizing chip U9, output termination capacitor C31 one end output voltage VDD；Another termination secondary ground of electric capacity C31；
Output is with reverse-connection protection circuit 18 as shown in Figure 2; including relay R T1; diode D22, D14, D15; NPN audion Q5; fuse F2 (figure drawn two fuse holder F2_A and F2_B of F2, actually used in, fuse F2 need to be plugged); electric capacity C115, resistance R137, R138, R46, R43, R47, R127；
The switch one of relay R T1 terminates voltage Vo (being i.e. connected), the other end output voltage+Batt of output filter circuit 17 output with electric capacity C29 one end, and when RT1 switches off, then voltage+Batt is cut-off to disappear；Relay R T1 switchs another termination fuse F2 one end and diode D15 negative electrode, and the fuse F2 other end, as the positive output end of charger, is used for connecting battery positive voltage；The negative electrode of the one terminating diode D22 of resistance R137 and R138 and voltage Vp, the anode of diode D22 meets voltage VCCS；Voltage Vp by secondary power winding T1B output through diode rectification obtain；Voltage VCCS is by one end output voltage VS of secondary main winding T1E through diode D9, and voltage Vp compares gained after resistance R198 and diode D12；So having the advantage that relay R T coil power supply, when battery tension is the lowest, voltage VS is drawn relatively low, and now voltage Vp still can ensure that relay action message higher than voltage VCCS, voltage Vp；Other end contact relay RT1 coil one end of resistance R137 and R138, diode D14 negative electrode also connects secondary ground by electric capacity C115；Relay R T1 coil another terminating diode D14 anode and audion Q5 colelctor electrode；Base stage connecting resistance R46 one end, R47 one end and R127 one end of audion Q5, and by resistance R43 with connecing secondary and Q5 emitter stage；Resistance R46 another terminating diode D15 anode；Resistance R47 receives control signal Vrelay that MCU sends；The resistance R127 other end feeds back a voltage feedback signal Rev_Protect representing charger outfan connected accumulator pole sexual state to MCU；
This charger output polarity reverse connecting protection mechanism is as described below:
First protect for hardware circuit: when charger outfan is normally connected with accumulator polarity, control signal Vrelay that MCU sends is high level so that audion Q5 turns on, and the adhesive of relay R T1, voltage Vo can add to accumulator two ends；And when charger outfan and accumulator polarity reversal connection, electric current flows out from battery positive voltage, through L5, can again pass through R34 by BAT-terminal (charger negative output terminal) from Fig. 2, to secondary ground, battery terminal negative (what now positive output end BAT+ connect is battery terminal negative) is flowed to through resistance R43, R46, diode D15 again from secondary, base stage and the emitter stage of audion Q5 are reverse-biased, Q5 is immediately turned off so that relay R T1 disconnects, and cuts off output voltage+Batt；
Secondly, in the figure of resistance R43, lower end is secondary side reference ground, electric current flows from R43 lower end toward upper end, then that one end, the resistance R127 left side becomes nagative potential, voltage feedback signal Rev_Protect just can feed back this situation to MCU, MCU can drag down control signal Vrelay after detecting, further ensures that audion Q5 turns off.
Feedback control circuit 23 as in figure 2 it is shown, include resistance R31, R25, R22, R26, R20, R21, reference voltage source U2, the input U1A of optocoupler U1, diode D102；
Resistance R31 one end receives the voltage control signal Vset that MCU sends, and another terminates the adjustable side of reference voltage source U2, one end of resistance R25, one end of R26, one end of electric capacity C19 and C197；Resistance R25 another termination voltage Vo；The anode of another termination U2 of resistance R26 and secondary ground；One end of electric capacity C19 other end connecting resistance R22, another termination capacitor C197 other end of resistance R22 and the negative electrode of reference voltage stabilizing source U2；Negative electrode connecting resistance R21 one end of U2 and the negative electrode of optocoupler U1 input U1A, the anode of another termination optocoupler U1 input U1A of resistance R1 and one end of resistance R20, another terminating diode D102 negative electrode of resistance R20, diode D102 anode meets voltage VCCS；Voltage Vo is from the output of output filter circuit 17；Voltage VCCS is by one end output voltage VS of secondary main winding T1E through diode D9, and voltage Vp compares gained after resistance R198 and diode D12；Voltage Vp by secondary power winding T1B output through diode rectification obtain；Vset is an analog output voltage, and the size of its value can regulate charger final output voltage size.
Output current detection circuit 21 as in figure 2 it is shown, include resistance R34, R82, R156, R32, R135, R119, electric capacity C34, operational amplifier U4A；
Resistance R34 is arranged in circuit of synchronous rectification 16 outfan loop, a termination secondary ground, other end connecting resistance R82 one end；Another termination operational amplifier U4A in-phase input end of resistance R82 also connects secondary ground by electric capacity C34；The reverse input end of operational amplifier U4A is connect secondary ground by resistance R156 and is connect the outfan of U4A by resistance R32；The outfan of operational amplifier U4A by resistance R135 to MCU feedback signal Ioc, by resistance R119 output signal Iout；
Current foldback circuit 22 as it is shown in figure 5, include resistance R404, R405, R401, R403, electric capacity C68, C21, diode D11, operational amplifier U5A, NPN audion Q402, the input U10A of optocoupler U101；
Resistance R404 mono-termination voltage Vdd5, another terminates the reverse input end of operational amplifier U5A, diode D11 anode, and connects secondary ground by electric capacity C68, resistance R405；The signal Ioc of output current detection circuit 21 output is connected to the in-phase input end of operational amplifier U5A；Electric capacity one terminates U5A in-phase input end, another termination secondary ground；The output of operational amplifier U5A terminates audion Q402 base stage and connects secondary ground by resistance R401；The emitter stage of audion Q402 connects secondary ground, and colelctor electrode connects diode D11 negative electrode and the negative electrode of optocoupler U10 input U10A, and the anode of optocoupler U10 input U10A meets voltage VCCS by resistance；
The mechanism of this charger outfan overcurrent protection is:
When the output electric current excessive even outfan short circuit of outfan; the voltage of resistance R34 up-sampling also becomes big; signal Ioc becomes big; operational amplifier U5A is made to export high level; audion Q402 is turned on; optocoupler U10 turns on, and the feedback end of feedback signal to power supply chip IC1 completes the closed loop control of overcurrent protection.
Meanwhile, signal Ioc also becomes big, after MCU detects, can control signal Vrelay of output be dragged down so that relay R T1 disconnects, and cuts off the output of charger.
Output voltage detecting circuit 19 as shown in Figure 2, including resistance R39, R40, R44, R45；Resistance R39 mono-terminates the voltage Vo of output filter circuit 17 output, one end of other end connecting resistance R40, and output signal Vout to MCU；Another termination secondary ground of resistance R40；The one termination output of resistance R44 and the voltage+Batt of reverse-connection protection circuit 18 outfan, one end of other end connecting resistance R45, and output signal Vbatt to MCU；Another termination secondary ground of resistance R45；
Overvoltage crowbar 20 is as it is shown in figure 5, include NPN audion Q401, resistance R402；The one of resistance R402 terminates the base stage of audion Q401 and receives control signal OVP of MCU output；Another termination secondary ground of resistance R402；The emitter stage of audion Q401 connects secondary ground, and colelctor electrode connects the negative electrode of optocoupler U10 input U10A；
The mechanism of this charger outfan overvoltage protection is:
Voltage Vo before MCU control relay RT1 simultaneously and accumulator both end voltage afterwards；When any voltage is too high, control signal OVP being dragged down, Q401 turns on, and optocoupler U10 turns on, and the feedback end of feedback signal to power supply chip IC1 completes the closed loop control of overvoltage protection；At the same time it can also be control signal Vrelay of output dragged down so that relay R T1 disconnects, cut off the output of charger.
It addition, this charger also includes an overheating detection circuit, as shown in Figure 6, including resistance R99, critesistor NTC3；Resistance R99 mono-termination voltage VDD, another terminates critesistor NTC3 one end, and another termination secondary ground of output detections signal Vtemp1 to MCU, critesistor NTC3；Critesistor NTC3 is arranged in circuit of synchronous rectification 16 on the radiator of NMOS tube Q3, or near it；When NMOS tube Q3 is overheated, NCT3 dividing potential drop declines, and after MCU detects, can drag down control signal Vrelay so that relay R T1 disconnects, and cuts off the output of charger.
Battery temperature testing circuit 24 is as it is shown in fig. 7, comprises resistance R100, inductance filter L201, joint JP505, and a critesistor being arranged in accumulator (being not drawn in figure)；Critesistor in accumulator connects inductance filter L201 input by joint JP505；One the output termination secondary ground of inductance filter L201, another outfan meets voltage VDD, and output detections signal Vtemp2 to MCU by resistance R100；The temperature of MCU, the size of MCU regulation voltage control signal Vset, real-Time Compensation correction charging voltage, it is ensured that charge safe and at full charge is reported to according to external storage battery ambient temperature detection critesistor.
Claims (10)
1. a vehicle charger, it is characterised in that including:
MCU, input filter circuit (10), current rectifying and wave filtering circuit (11), input voltage detection circuit (12), overheating detection circuit (13), power control circuit (14), isolating transformer T1, secondary power supply circuits (15), circuit of synchronous rectification (16), output filter circuit (17), output and reverse-connection protection circuit (18), output voltage detecting circuit (19), overvoltage crowbar (20), output current detection circuit (21), current foldback circuit (22), feedback control circuit (23)；
The input termination alternating current of input filter circuit (10), output termination current rectifying and wave filtering circuit (11)；Output termination power control circuit (14) of current rectifying and wave filtering circuit (11)；Input voltage detection circuit (12) is from the rectification output end monitoring voltage HV1 of current rectifying and wave filtering circuit (11) and feeds back corresponding signal to MCU；Key element or the temperature at position feed back to MCU in overheating detection circuit (13) detection charger；Power control circuit (14) is connected with isolating transformer T1 primary side winding；The vice-side winding of isolating transformer T1 connects secondary power supply circuits (15) and circuit of synchronous rectification (16)；Output termination output filter circuit (17) of circuit of synchronous rectification (16)；Output termination output and the reverse-connection protection circuit (18) of output filter circuit (17)；Output and reverse-connection protection circuit (18) connect accumulator by output lead；
Overheating detection circuit (13) including: includes resistance R99, critesistor NTC3；Resistance R99 mono-termination voltage VDD, another terminates critesistor NTC3 one end, and another termination secondary ground of output detections signal Vtemp1 to MCU, critesistor NTC3；Critesistor NTC3 is arranged in circuit of synchronous rectification (16) on the radiator of NMOS tube Q3；
Input termination output filter circuit (17) outfan of feedback control circuit (23) carries out voltage sample, and the voltage control signal Vset simultaneously exported by MCU controls；Output termination power control circuit (14) of feedback control circuit (23), completes closed loop control；
Voltage+the Batt of input termination output filter circuit (17) the voltage Vo that exports of output voltage detecting circuit (19) and/or output and reverse-connection protection circuit (18) outfan, and the voltage signal of collection is fed back to MCU；MCU connects overvoltage crowbar (20), and overvoltage crowbar (20) connects power control circuit (14)；
Current signal in output current detection circuit (21) detection circuit of synchronous rectification (16) outfan loop, feeds back to MCU, and feeds back to current foldback circuit (22) simultaneously；Current foldback circuit (22) connects power control circuit (14)；
Output provides charger output polarity reverse connecting protection with reverse-connection protection circuit (18), and is simultaneously connected with MCU, feeds back the accumulator pole sexual state connected to MCU；
MCU, according to each input signal, is charged device input overvoltage protection, outfan overvoltage, overcurrent protection, output polarity reverse connecting protection, and the control of charger overtemperature protection.
2. vehicle charger as claimed in claim 1, it is characterised in that:
Input voltage detection circuit (12) includes resistance R12, R17, R205, Zener diode ZD205, optocoupler U3；Current rectifying and wave filtering circuit (11) rectification output end voltage HV1 connecting resistance R12 one end, another termination Zener diode ZD205 negative electrode of resistance R12, and connect ground, former limit by resistance R17；Zener diode ZD205 anode connects optocoupler U3 input anode, and U3 input negative electrode connects ground, former limit；Optocoupler U3 outfan colelctor electrode meets positive voltage VDD by pull-up resistor R205, and to MCU output signal AC-OK；The outfan emitter stage of optocoupler U3 connects secondary ground.
3. vehicle charger as claimed in claim 1, it is characterised in that:
Power control circuit (14) includes power supply chip IC1, power tube Q2, critesistor NTC2, the outfan U1B of optocoupler U1, the outfan U10B of optocoupler U101；
Current rectifying and wave filtering circuit (11) positive output termination capacitor C12 and one end of resistance R9 and main winding T1A one end, isolating transformer T1 former limit；Another terminating diode D8 negative electrode of electric capacity C12 and resistance R9, diode D8 anode connects the former limit main winding T1A other end and power tube Q2 drain electrode；Electric capacity C11 is connected in parallel on drain electrode and the source electrode of Q2；Source electrode connecting resistance R13 one end of power tube Q2 also connects ground, former limit by sampling resistor R15；The sampling end of resistance R13 another termination power supply chip IC1 also connects former limit by electric capacity C10；One end of drive end connecting resistance R8 of power supply chip IC1, the base stage of PNP triode Q1；The emitter stage connecting resistance R8 other end, the grid of power tube Q2 and resistance R14 one end of audion Q1；The colelctor electrode connecting resistance R14 other end of audion Q1 and the source electrode of power tube Q2；
The former limit of isolating transformer T1 power winding T1C one termination former limit ground, another termination High frequency filter element B2 one end, the anode of another terminating diode D5 of High frequency filter element B2, electric capacity C17 one end；The other end of electric capacity C17 connects negative electrode and resistance R128 one end of diode D5 by resistance R129；Another terminating diode D2 anode of resistance R128, Zener diode D10 negative electrode and electric capacity C4 one end, another ground, termination former limit of electric capacity C4；Diode D2 negative electrode connects the power end of power supply chip IC1 and connects ground, former limit by electric capacity C6；The power end of IC1 connects current rectifying and wave filtering circuit (11) positive output end also by resistance R3；The anode of Zener diode D1 connects the voltage detecting end of power supply chip IC1, resistance R16 one end, electric capacity C3 one end；The resistance R16 other end connects ground, former limit by the critesistor NTC2 of negative temperature coefficient；Another of electric capacity C3 terminates ground, former limit；The timing capacitor external connection end of power supply chip IC1 connects ground, former limit by electric capacity C8；IC1 ground connection terminates ground, former limit；
Zero current detection terminating resistor R6 one end, diode D3 negative electrode, electric capacity C7 and resistance R5 one end of power supply chip IC1, diode D4 anode；Electric capacity C7 and the resistance R5 other end, diode D4 negative electrode connect ground, former limit；Resistance R6 another terminating diode D3 anode and resistance R7 one end；One end of another termination isolating transformer T1 former limit of resistance R7 auxiliary winding T1D, another ground, termination former limit of former limit auxiliary winding T1D；
One end of feedback termination capacitor C9 of power supply chip IC1, the outfan U1B colelctor electrode of optocoupler U1 and the outfan U10B colelctor electrode of optocoupler U101；The outfan U10B emitter stage of the other end of electric capacity C9, the outfan U1B emitter stage of optocoupler U1 and optocoupler U101 connects ground, former limit.
4. vehicle charger as claimed in claim 3, it is characterised in that:
Critesistor NTC2 is arranged on by power tube Q2 in the circuit board.
5. vehicle charger as claimed in claim 1, it is characterised in that:
Circuit of synchronous rectification (16) includes electric capacity C18, C190, C16, resistance R18, R24, R10, R120, R125, R126, NMOS tube Q3, synchronous rectification chip IC 2；IC2 samples NCP4304B；
Output filter circuit (17) includes electric capacity C93, C97, C29, C28, inductance filter L5；
One end output voltage VS of isolating transformer secondary main winding T1E, connects one end and the inductance filter L5 first input end of electric capacity C93, C97；Inductance filter L5 the second input connecting resistance R34 one end, another termination secondary ground of the resistance R34 other end, electric capacity C93 and C97；Another termination capacitor C190 of secondary main winding T1E, C18 one end, the drain electrode of NMOS tube Q3 and resistance R120 one end；Electric capacity C190 another termination Q3 source electrode and resistance R24 one end and secondary ground；The electric capacity C18 other end connects NMOS tube Q3 source electrode and secondary ground by resistance R18；Another termination NMOS tube Q3 grid of resistance R24 also connects the drive end of synchronous rectification chip IC 2 by resistance R10；The sampling end connecting resistance R120 other end of synchronous rectification chip IC 2；The power supply termination voltage VS of synchronous rectification chip IC 2, and connect secondary ground by electric capacity C16；The ground connection termination secondary ground of IC2；The maximum service time of IC2 sets end and minimum service time sets end and connects secondary ground by resistance R126 and R125 respectively；
The first outfan output voltage Vo of inductance filter L5, the second outfan is as the negative output terminal of vehicle charger；Electric capacity C29 and C28 is in parallel with the two of inductance filter L5 outfans.
6. vehicle charger as claimed in claim 1, it is characterised in that:
Secondary power supply circuits (15) include that the secondary of isolating transformer T1 is powered winding T1B, High frequency filter element B3, diode D10, D7, D12, D9, resistance R104, R198, electric capacity C78, C73, C5, C108；Voltage stabilizing chip U402, U9, electric capacity C27, C39, C61 and C31；
Secondary power winding T1B one termination secondary ground, another termination High frequency filter element B3 one end, the anode of another terminating diode D10 and D7 of B3, one end of resistance R104；The other end of resistance R104 connects the negative electrode of diode D10 and D7, and one end of electric capacity C73 and C5, one end of resistance R198 by electric capacity C78；The negative electrode output voltage Vp of diode D10 and D7；Another termination secondary ground of electric capacity C73 and C5；Another terminating diode D12 anode of resistance R198, diode D12 negative electrode connects diode D9 negative electrode and electric capacity C108 one end；Another termination secondary ground of electric capacity C108；Diode D9 anode meets the output voltage VS of isolating transformer secondary main winding T1E one end；The negative electrode output voltage VCCS of diode D9；
Voltage VCCS is connected to electric capacity C27 and C39 one end and voltage stabilizing chip U402 input；Another termination secondary ground of electric capacity C27 and C39；Voltage stabilizing chip U402 adjusts termination secondary ground, the outfan output voltage Vdd5 of voltage stabilizing chip U402；The one termination outfan of U402 of electric capacity C61 and the input of voltage stabilizing chip U9 and Enable Pin, another termination secondary ground of electric capacity C61；The ground connection termination secondary ground of voltage stabilizing chip U9, output termination capacitor C31 one end output voltage VDD；Another termination secondary ground of electric capacity C31.
7. vehicle charger as claimed in claim 1, it is characterised in that:
Output and reverse-connection protection circuit (18) include relay R T1, diode D22, D14, D15, NPN audion Q5, fuse F2, resistance R137, R138, R46, R43, R47, R127；
The switch one of relay R T1 terminates the voltage Vo that output filter circuit (17) exports, other end output voltage+Batt, and relay R T1 switchs another termination fuse F2 one end and diode D15 negative electrode, and the fuse F2 other end is as the positive output end of charger；The negative electrode of the one terminating diode D22 of resistance R137 and R138 and voltage Vp, the anode of diode D22 meets voltage VCCS；Voltage Vp by secondary power winding T1B output through diode rectification obtain；Voltage VCCS is by one end output voltage VS of secondary main winding T1E through diode D9, and voltage Vp compares gained after resistance R198 and diode D12；Other end contact relay RT1 coil one end of resistance R137 and R138, diode D14 negative electrode also connects secondary ground by electric capacity C115；Relay R T1 coil another terminating diode D14 anode and audion Q5 colelctor electrode；Base stage connecting resistance R46 one end, R47 one end and R127 one end of audion Q5, and by resistance R43 with connecing secondary and Q5 emitter stage；Resistance R46 another terminating diode D15 anode；Resistance R47 receives control signal Vrelay that MCU sends；The resistance R127 other end feeds back a voltage feedback signal Rev_Protect representing charger outfan connected accumulator pole sexual state to MCU.
8. vehicle charger as claimed in claim 1, it is characterised in that:
Feedback control circuit (23) includes resistance R31, R25, R22, R26, R20, R21, reference voltage source U2, the input U1A of optocoupler U1, diode D102；
Resistance R31 one end receives the voltage control signal Vset that MCU sends, and another terminates the adjustable side of reference voltage source U2, one end of resistance R25, one end of R26, one end of electric capacity C19 and C197；Resistance R25 another termination voltage Vo；The anode of another termination U2 of resistance R26 and secondary ground；One end of electric capacity C19 other end connecting resistance R22, another termination capacitor C197 other end of resistance R22 and the negative electrode of reference voltage stabilizing source U2；Negative electrode connecting resistance R21 one end of U2 and the negative electrode of optocoupler U1 input U1A, the anode of another termination optocoupler U1 input U1A of resistance R1 and one end of resistance R20, another terminating diode D102 negative electrode of resistance R20, diode D102 anode meets voltage VCCS；Voltage Vo is from the output of output filter circuit (17)；Voltage VCCS is by one end output voltage VS of secondary main winding T1E through diode D9, and voltage Vp compares gained after resistance R198 and diode D12；Voltage Vp by secondary power winding T1B output through diode rectification obtain.
9. vehicle charger as claimed in claim 1, it is characterised in that:
Output current detection circuit (21) includes resistance R34, R82, R135, R119, and an amplifying circuit；Resistance R34 is arranged in circuit of synchronous rectification (16) outfan loop, a termination secondary ground, other end connecting resistance R82 one end；The input of another termination amplifying circuit of resistance R82；The outfan of amplifying circuit by resistance R135 to MCU feedback signal Ioc, by resistance R119 output signal Iout；
Current foldback circuit (22) includes resistance R404, R405, R401, R403, electric capacity C68, C21, diode D11, operational amplifier U5A, NPN audion Q402, the input U10A of optocoupler U101；Resistance R404 mono-termination voltage Vdd5, another terminates the reverse input end of operational amplifier U5A, diode D11 anode, and connects secondary ground by electric capacity C68, resistance R405；The signal Ioc that output current detection circuit (21) exports is connected to the in-phase input end of operational amplifier U5A；Electric capacity one terminates U5A in-phase input end, another termination secondary ground；The output of operational amplifier U5A terminates audion Q402 base stage and connects secondary ground by resistance R401；The emitter stage of audion Q402 connects secondary ground, and colelctor electrode connects diode D11 negative electrode and the negative electrode of optocoupler U10 input U10A, and the anode of optocoupler U10 input U10A meets voltage VCCS by resistance；
Output voltage detecting circuit (19) includes resistance R39, R40, R44, R45；Resistance R39 mono-terminates the voltage Vo that output filter circuit (17) exports, one end of other end connecting resistance R40, and output signal Vout to MCU；Another termination secondary ground of resistance R40；The one termination output of resistance R44 and the voltage+Batt of reverse-connection protection circuit (18) outfan, one end of other end connecting resistance R45, and output signal Vbatt to MCU；Another termination secondary ground of resistance R45；
Overvoltage crowbar (20) includes NPN audion Q401, resistance R402；The one of resistance R402 terminates the base stage of audion Q401 and receives control signal OVP of MCU output；Another termination secondary ground of resistance R402；The emitter stage of audion Q401 connects secondary ground, and colelctor electrode connects the negative electrode of optocoupler U10 input U10A.
10. vehicle charger as claimed in claim 1, it is characterised in that:
Also including a battery temperature testing circuit (24), battery temperature testing circuit (24) includes resistance R100, inductance filter L201, joint JP505, and a critesistor being arranged in accumulator；Critesistor in accumulator connects inductance filter L201 input by joint JP505；One the output termination secondary ground of inductance filter L201, another outfan meets voltage VDD, and output detections signal Vtemp2 to MCU by resistance R100.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510828900X | 2015-11-25 | ||
| CN201510828900.XA CN105262185A (en) | 2015-11-25 | 2015-11-25 | Vehicular charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205725091U true CN205725091U (en) | 2016-11-23 |
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Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510828900.XA Pending CN105262185A (en) | 2015-11-25 | 2015-11-25 | Vehicular charger |
| CN201610137459.5A Active CN105576786B (en) | 2015-11-25 | 2016-03-10 | Vehicle charger |
| CN201620184578.1U Withdrawn - After Issue CN205725091U (en) | 2015-11-25 | 2016-03-10 | Vehicle charger |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510828900.XA Pending CN105262185A (en) | 2015-11-25 | 2015-11-25 | Vehicular charger |
| CN201610137459.5A Active CN105576786B (en) | 2015-11-25 | 2016-03-10 | Vehicle charger |
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| Country | Link |
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| CN (3) | CN105262185A (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM534700U (en) * | 2016-10-12 | 2017-01-01 | 瑞柯科技股份有限公司 | Vehicle electrical apparatus with protection and detection mechanism for power reversely |
| CN106452064B (en) * | 2016-10-28 | 2018-11-02 | 陕西法士特齿轮有限责任公司 | A kind of automobile-used controllable electric power output circuit and its control method |
| CN107492932A (en) * | 2017-09-08 | 2017-12-19 | 湖南长高思瑞自动化有限公司 | A kind of charge protection method and system of DC charging unit |
| CN107688133A (en) * | 2017-10-26 | 2018-02-13 | 绵阳高新区探索科技有限责任公司 | Control box has access to electricity short-circuit detecting circuit on charging gun cable |
| CN108110872A (en) * | 2018-02-26 | 2018-06-01 | 浙江聚源电子有限公司 | A kind of charger of adjust automatically charging voltage |
| CN108494262A (en) * | 2018-04-20 | 2018-09-04 | 丰县宏祥电子科技有限公司 | The special full isolation DC-DC converter of New-energy electric vehicle |
| CN109606196B (en) * | 2019-01-18 | 2023-11-17 | 四川瑞可达连接***有限公司 | Electric automobile rifle that charges of area control by temperature change function |
| WO2020215279A1 (en) * | 2019-04-25 | 2020-10-29 | 深圳欣锐科技股份有限公司 | Over-voltage protection control circuit and related device |
| CN110198064A (en) * | 2019-06-26 | 2019-09-03 | 深圳市道通智能航空技术有限公司 | A kind of control circuit of power supply, method and charger |
| CN111668904A (en) * | 2020-06-23 | 2020-09-15 | 东莞新能安科技有限公司 | Charger detection circuit, method and electrochemical device |
| CN112509299A (en) * | 2020-11-11 | 2021-03-16 | 广东雅达电子股份有限公司 | Wireless temperature device supporting CT power taking of high-voltage power distribution cabinet |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7733053B2 (en) * | 2007-10-26 | 2010-06-08 | Cheng Uei Precision Industry Co., Ltd. | Charging circuit for a vehicle charger |
| CN201215896Y (en) * | 2008-03-23 | 2009-04-01 | 仝兴孚 | Circuit for accumulator charging machine |
| JP2013228244A (en) * | 2012-04-25 | 2013-11-07 | Toshiba Corp | Secondary battery system having function for monitoring battery residual capacity |
| CN203456925U (en) * | 2013-08-21 | 2014-02-26 | 深圳市龙威盛电子科技有限公司 | Charger with multiple USB output terminals |
-
2015
- 2015-11-25 CN CN201510828900.XA patent/CN105262185A/en active Pending
-
2016
- 2016-03-10 CN CN201610137459.5A patent/CN105576786B/en active Active
- 2016-03-10 CN CN201620184578.1U patent/CN205725091U/en not_active Withdrawn - After Issue
Also Published As
| Publication number | Publication date |
|---|---|
| CN105576786A (en) | 2016-05-11 |
| CN105576786B (en) | 2017-10-17 |
| CN105262185A (en) | 2016-01-20 |
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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned | ||
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Granted publication date: 20161123 Effective date of abandoning: 20171017 |