CN106374599A - Intelligent charger of electromobile - Google Patents
Intelligent charger of electromobile Download PDFInfo
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- CN106374599A CN106374599A CN201610815044.9A CN201610815044A CN106374599A CN 106374599 A CN106374599 A CN 106374599A CN 201610815044 A CN201610815044 A CN 201610815044A CN 106374599 A CN106374599 A CN 106374599A
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- 238000001914 filtration Methods 0.000 claims abstract description 95
- 238000007600 charging Methods 0.000 claims abstract description 69
- 238000001514 detection method Methods 0.000 claims abstract description 49
- 238000006243 chemical reaction Methods 0.000 claims abstract description 37
- 238000005070 sampling Methods 0.000 claims description 34
- 238000004804 winding Methods 0.000 claims description 32
- 230000005611 electricity Effects 0.000 claims description 12
- 230000033228 biological regulation Effects 0.000 claims description 11
- 230000003287 optical effect Effects 0.000 claims description 4
- 206010034133 Pathogen resistance Diseases 0.000 claims 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000036772 blood pressure Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 238000010281 constant-current constant-voltage charging Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
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- H02J7/0026—
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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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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- H02J7/0072—
-
- 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
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
- H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
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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
- H02J7/00302—Overcharge protection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses an intelligent charger of an electromobile. The intelligent charger comprises a lightning protection module, an EMI filtering module, a pre-stage rectification and filtering module, a power conversion module, a first post-stage rectification and filtering module, an output module, an MCU control module, a PWM control module and a constant-voltage and constant-current detection module, wherein the lightning protection module, the EMI filtering module, the pre-stage rectification and filtering module, the power conversion module, the first post-stage rectification and filtering module and the output module are sequentially connected, the first post-stage rectification and filtering module is connected with the PWM control module through the constant-voltage and constant-current detection module, an output end of the output module is connected with the PWM control module through the constant-voltage and constant-current detection module, the PWM control module is connected with the power conversion module, and the MCU control module is in cycle connection with the output module. The MCU control module of the intelligent charger of the electromobile is used for detecting a charging state of a storage battery, a charging switch of the output module is controlled to be switched off when the storage battery is excessively charged or cannot be charged, effective management on the charging of the storage battery is realized, and the service lifetime of the storage battery is prolonged.
Description
Technical field
The present invention relates to power technique fields, more particularly, to a kind of intelligent charger for electric bicycle.
Background technology
Existing intelligent charger for electric bicycle no crosses charging protection function, may proceed to hold for a long time after battery of electric vehicle is fully charged
Continuous charging, leads to electromobile battery overcharge, service life is affected；Additionally, electromobile battery is not charging or is filling
When not entering de-electrifying, charger None- identified.
Content of the invention
For the deficiencies in the prior art, the present invention proposes a kind of intelligent charger for electric bicycle, and this electric motor intelligent charges
The mcu control module of device, according to the charged state of accumulator, controls the conducting of charge switch and the cut-off of output module, solves
Because of nothing, existing intelligent charger for electric bicycle distinguishes that the charged state of accumulator causes accumulator super-charge or can not fill de-electrifying problem,
Improve the service life of accumulator.
To achieve these goals, technical solution of the present invention is as follows:
A kind of intelligent charger for electric bicycle, including lightning-protection module, emi filtration module, prime rectification filtering module, power modulus of conversion
Block, the first rear class rectification filtering module, output module, mcu control module, pwm control module, constant pressure and flow detection module,
Two rear class rectification filtering modules.Lightning-protection module, emi filtration module, prime rectification filtering module, power conversion module, after first
Level rectification filtering module, output module are sequentially connected.First rear class rectification filtering module is through constant pressure and flow detection module and pwm
Control module is connected.The outfan of output module is connected with pwm control module through constant pressure and flow detection module.Pwm is controlled
Molding block is connected with power conversion module.Mcu control module is connected with output module circulation.Power conversion module and with
Two rear class rectification filtering modules are connected；Second rear class rectification filtering module detects mould with mcu control module, constant pressure and flow respectively
Block is connected.
Further, constant pressure and flow detection module comprise voltage sampling unit, voltage regulation unit, current sampling unit,
Electric current comparing unit, constant pressure and flow signal output unit.Second rear class rectification filtering module and constant pressure and flow signal output unit
It is connected.First rear class rectification filtering module is connected with voltage sampling unit；Voltage sampling unit is through voltage regulation unit
It is connected with constant pressure and flow signal output unit.The outfan of output module is connected with current sampling unit；Current sample list
Unit is connected with constant pressure and flow signal output unit through overcurrent comparing unit.Constant pressure and flow signal output unit is controlled with pwm
Module is connected.
Further, mcu control module comprises mcu chip u1, resistance r36, r46, r47, r48.The feedback of mcu chip u1
Pin is connected with the cathode output end of output module through resistance r47；And the feedback pin of mcu chip u1 is through resistance
R48 is grounded；The signal output pin of mcu chip u1 is connected with output module through resistance r46；The charging electricity of mcu chip u1
Stream detection pin is connected with the input of constant pressure and flow detection module through resistance r36.
Further, output module comprises p-type mos pipe q2, N-shaped mos pipe q3, stabilivolt zd1, resistance r30, r40, r41.
The cathode output end of the first rear class rectification filtering module is connected with the drain electrode of p-type mos pipe q2；The source electrode of p-type mos pipe q2 is defeated
Go out module cathode output end.Stabilivolt zd1 is connected in parallel between the grid of p-type mos pipe q2 and drain electrode；Resistance r30 and stabilivolt zd1
It is in parallel.The grid of p-type mos pipe q2 is connected with the source electrode of N-shaped mos pipe q3 through resistance r41.The drain electrode of N-shaped mos pipe q3 with
The cathode output end of the first rear class rectification filtering module is connected；The drain electrode of N-shaped mos pipe q3 is output module cathode output end.
The cathode output end of the first rear class rectification filtering module and being connected with the grid of N-shaped mos pipe q3 through resistance r40；N-shaped
The grid of mos pipe q3 and being connected with mcu control module.
Further, power conversion module comprises transformator t1, resistance r8, r10, r11, electric capacity c3, diode d1.Resistance
R8 is connected between the armature winding of transformator t1 through diode d1；Resistance r11 connects resistance r8 and diode through electric capacity c3
The common node of d1；Resistance r10 is parallel with one another with resistance r11.First secondary windings of transformator t1 and the first rear class rectification filter
Ripple module is connected；The second subprime winding of transformator t1 is connected with mcu control module.
Further, pwm control module comprise pwm chip u3, N-shaped mos pipe q1, diode d2, d3, resistance r18, r12,
R13, r14, r15, r16, r17, r18, r3, r5, electric capacity c5, c6, c7, light sensitive diode ic2.The output pin of pwm chip u3
It is connected with the grid of N-shaped mos pipe q1 through resistance r18；The grid of N-shaped mos pipe q1 is connected through resistance r3；Transformator t1
The negative input of armature winding be connected with the source electrode of N-shaped mos pipe q1；The drain electrode of N-shaped mos pipe q1 connects through resistance r5
Ground；Diode d3 is in parallel with resistance r18.The biasing winding of transformator t1 sequentially passes through resistance r12, diode d2 and pwm core
The power pins of piece u3 are connected；The over-current detection pin of pwm chip u3 is connected with the drain electrode of N-shaped mos pipe q1 through resistance r17
Connect；The over-current detection pin of pwm chip u3 and through electric capacity c6 ground connection.
Further, constant pressure and flow detection module comprises transport and placing device ic4, controlled source of stable pressure ic3, ic5, diode d7, sends out
Optical diode u3a, resistance r22, resistance r23, resistance r24, resistance r25, resistance r26, resistance r32, resistance r34, resistance r37,
Resistance r38, resistance r39, electric capacity c12, c13, c15, c16.The inverting input of transport and placing device ic4 is through resistance r32 and output mould
The cathode output end of block is connected；The normal phase input end of transport and placing device ic4 sequentially passes through the positive pole of resistance r37, r38 and output module
Outfan is connected.The negative electrode of controlled source of stable pressure ic5 and the common node connecting resistance r37 and resistance r38 with reference to pole respectively；Electricity
Hinder the common node of r37 and resistance r38 and through electric capacity c16 ground connection.The plus earth of controlled source of stable pressure ic5；Electric capacity c14 is simultaneously
It is associated between inverting input and the normal phase input end of transport and placing device ic4；The inverting input of transport and placing device ic4 sequentially passes through electric capacity
C15, resistance r34 are connected with the outfan of transport and placing device ic4；The normal phase input end of transport and placing device ic4 is grounded through resistance r39；The
Two rear class rectification filtering modules sequentially pass through resistance r23, r22, controlled source of stable pressure ic3 ground connection；The reference pole of controlled source of stable pressure ic3
It is connected with the negative electrode of diode d5 through resistance r24, and through resistance r26 ground connection；The negative electrode of controlled source of stable pressure ic3 passes through
Diode d7 is connected with the outfan of transport and placing device ic4, and sequentially passes through electric capacity c12, resistance r25, c13 ground connection；Luminous two
Pole pipe u3a is in parallel with resistance r22, and light emitting diode u3a provides optical signal for pwm control module.
A kind of intelligent charger for electric bicycle, turns including lightning-protection module, emi filtration module, prime rectification filtering module, power
Die change block, the first rear class rectification filtering module, output module, mcu control module, pwm control module, constant pressure and flow detection mould
Block, the second rear class rectification filtering module.
Lightning-protection module, emi filtration module, prime rectification filtering module, power conversion module, the first rear class rectifying and wave-filtering mould
Block, output module are sequentially connected.The charging current information that pwm control module is fed back according to constant pressure and flow detection module, first passes through
Power conversion module is controlled to make accumulator carry out constant-current charge.During constant-current charge, the voltage of accumulator rises；Work as electric power storage
When the voltage in pond rises to predetermined value, pwm control module adjustment power conversion module makes accumulator carry out constant-voltage charge；Constant voltage
In charging process, charging current is gradually reduced；The detection of mcu control module detects to the charging current of output module output；
When charging current is less than predetermined value, mcu control module controls output module to disconnect, and accumulator charges and terminates.
Further, constant pressure and flow detection module comprise voltage sampling unit, voltage regulation unit, current sampling unit,
Electric current comparing unit, constant pressure and flow signal output unit.Second rear class rectification filtering module is constant pressure and flow signal output unit
Working power is provided.During constant-current charge, the charging current of the output to output module for the current sampling unit is sampled；Electric current ratio
Compared with unit, charge current sample signal and reference signal are compared, try to achieve battery charging current error signal；Electric current comparing unit
Adjust the constant pressure and flow control signal of constant pressure and flow signal output unit output according to battery charging current error signal；Pwm controls mould
Tuber to control the output of power conversion module so that defeated according to the dutycycle that the constant pressure and flow control signal after adjustment adjusts pwm
The charging current going out module output maintains constant current state.During constant-voltage charge, voltage sampling unit is to described first rear class rectification
The charging voltage of filtration module output is sampled；The charging voltage size that voltage regulation unit is sampled according to voltage sampling unit
Adjust the constant pressure and flow control signal of constant pressure and flow signal output unit output；Pwm control module controls letter according to constant pressure and flow
Number size adjustment pulse duty factor, thus control power conversion module energy export so that output module output charging
Voltage maintains pressure constant state.
Beneficial effects of the present invention:
(1) the mcu control module of this intelligent charger for electric bicycle detects the charged state of accumulator, and in accumulator super-charge or
When cannot charge, control the charge switch of output module to disconnect, accumulator is charged and achieves effective management, improve accumulator
Service life.
(2) this intelligent charger for electric bicycle detects the big of charging current and charging voltage by constant pressure and flow detection module
Little, pwm control module controls power conversion module so that this electric motor intelligent fills according to the size of charging current and charging voltage
Constant-current constant-voltage charging realized by electrical equipment, it is to avoid accumulator charges excessive.
Brief description
Fig. 1 is the logic block-diagram of the present invention.
Fig. 2 is the logic block-diagram of constant pressure and flow detection module 9 in Fig. 1.
Fig. 3 is the circuit theory diagrams of the present invention.
Wherein, the reference of Fig. 1-Fig. 3 is: lightning-protection module 1, emi filtration module 2, prime rectification filtering module 3, work(
Rate modular converter 4, the first rear class rectification filtering module 5, output module 6, mcu control module 7, pwm control module 8, constant pressure and constant
Stream detection module 9, voltage sampling unit 91, voltage regulation unit 92, current sampling unit 93, electric current comparing unit 94, constant voltage
Constant current signal output unit 95.
Specific embodiment
With reference to the accompanying drawings and examples, the present invention is expanded on further.
A kind of intelligent charger for electric bicycle, including lightning-protection module 1, emi filtration module 2, prime rectification filtering module 3, work(
Rate modular converter 4, the first rear class rectification filtering module 5, output module 6, mcu control module 7, pwm control module 8, constant pressure and constant
Stream detection module 9, the second rear class rectification filtering module 10.
Lightning-protection module 1, emi filtration module 2, prime rectification filtering module 3, power conversion module 4, the first rear class rectification filter
Ripple module 5, output module 6 are sequentially connected；First rear class rectification filtering module 5 is controlled with pwm through constant pressure and flow detection module 9
Module 8 is connected；The outfan of output module 6 is connected with pwm control module 8 through constant pressure and flow detection module 9；Prime is whole
Stream filtration module 3 is connected with pwm control module 8；Pwm control module 8 is connected with power conversion module 4；Mcu control module
7 are connected with output module 6 circulation；Power conversion module 4 and being connected with the second rear class rectification filtering module 10；Second rear class
Rectification filtering module 10 is connected with mcu control module 7, constant pressure and flow detection module 9 respectively.
Civil power 220v inputs from the input of lightning-protection module 1.When civil power because thunderbolt or other factors produce high pulse voltage
When, it will damage this charger.The effect of lightning-protection module 1 is exactly to produce because of indirect lightning strike on release circuit within the shortest time
A large amount of pulse energies on safety line, thus protecting charger.Then emi filtration module 2 suppression lightning-protection module 1 output city
Electromagnetic interference in electricity；Additionally, emi filtration module 2 can also stop charger that electrical network is produced with battery interference.Emi filters mould
The higher unidirectional current of the voltage of output smoothing after the rectification of electric main prime rectification filtering module 3 of block 2 output, filtering.Work(
HVDC is converted into the low-voltage DC being applied to output module 6 by rate modular converter 4.Second rear class rectification filtering module 10
It is respectively mcu control module 7, constant pressure and flow detection module 9 provides running voltage.Prime rectification filtering module 3 controls mould for pwm
Block 8 provides over-current detection to compensate enabling signal.
Charge when starting, pwm control module 8 controls the output of power conversion module 4 so that accumulator carries out constant current fills
Electricity.Constant pressure and flow detection module 9 is sampled to the output current of output module 6, and constant pressure and flow detection module 9 is by sample rate current
Change into voltage signal, and the voltage signal after conversion is compared with reference voltage, try to achieve current error signal, then will miss
Difference signal feeds back to pwm control module 8.Pwm control module 8 controls work(according to the dutycycle that current error signal adjusts pwm
The output of rate modular converter 4 is so that the electric current of output module 5 output maintains constant current state.
During constant-current charge, the voltage of accumulator can be gradually increasing, when the voltage of accumulator rises to certain value,
Pwm control module 8 controls the output of power conversion module 4 so that accumulator carries out constant-voltage charge.During constant-voltage charge, constant pressure and constant
Stream detection module 9 is sampled to the voltage after the first rear class rectification filtering module 5 rectifying and wave-filtering and sampled voltage is compared
Relatively.Then voltage comparative result is sent to pwm control module 8；When the voltage of the first rear class rectification filtering module 5 output rises
Or when declining, pwm control module 8 controls the output of power conversion module 4 so that after first by the dutycycle adjusting pwm
Level rectification filtering module 5 output voltage maintains pressure constant state.
During constant-voltage charge, mcu control module 7 is sampled to the charging current of accumulator, and mcu control module 7 will charge
Current sampling data is compared with charging current threshold value, is less than charging current threshold value when mcu control module 7 determines charging current
When, mcu control module 7 controls output module 6 to close, and accumulator stops charging.
Lightning-protection module 1 comprises fuse f1, varistor mov1.Fuse f1 is connected on the negative input of this charger；Pressure
Quick resistance mov1 is connected between the electrode input end of this charger and negative input.
Emi filtration module 2 comprises mutual inductor tl1, tl2, tl3, electric capacity cx1, cx2, resistance r1, r2, r1a, r2a.Mutually
Sense coil tl1, tl2, tl3 are sequentially connected；Resistance r1, r2 are serially connected；Resistance r1a, r2a are serially connected；Resistance after series connection
Resistance r1a, r2a after r1, r2 and series connection are connected between cathode output end and the cathode output end of mutual inductor tl1；Electric capacity
Cx1 is connected between cathode output end and the cathode output end of mutual inductor tl1.The positive pole that electric capacity cx2 is connected on mutual inductor tl2 is defeated
Go out between end and cathode output end.
Prime rectification filtering module 3 comprises rectifier bridge stack db1, electric capacity c1, c2, c4.The positive pole input of rectifier bridge stack db1
Hold, the cathode output end of mutual inductor tl3, cathode output end are connected negative input respectively；Electric capacity c1, c2, c4 connect respectively
Between the cathode output end and cathode output end of rectifier bridge stack db1；The cathode output end ground connection of rectifier bridge stack db1.
Power conversion module 4 comprises transformator t1, resistance r8, r10, r11, electric capacity c3, diode d1.Resistance r8 is through two
Pole pipe d1 is connected between the armature winding of transformator t1；Resistance r11 connects the public of resistance r8 and diode d1 through electric capacity c3
Node；Resistance r10 is parallel with one another with resistance r11.Specifically, resistance r8 is connected with the negative electrode of diode d1.Transformator t1 bag
Containing the first secondary windings, second subprime winding.First secondary windings, second subprime winding are altogether.
First rear class rectification filtering module 5 comprises diode d5, resistance r20, r21, electric capacity c8, c9, c10, mutual inductor
l1.The first secondary windings cathode output end of transformator t1 is connected with the electrode input end of mutual inductor l1 through diode d5
Connect；First secondary windings of negative input connection transformer t1 of mutual inductor l1, second subprime winding holding altogether.Diode
The negative electrode of d5 electric capacity c9, c10 ground connection respectively.The anode of diode d5 sequentially passes through resistance r20, electric capacity c8 is connected to negative electrode；Electricity
Resistance r21 and resistance r20 is in parallel.
Second rear class rectification filtering module 10 comprises diode d6, electric capacity c11.The second subprime winding of transformator t1 is just
Pole outfan is connected with the anode of diode d6；The negative electrode of diode d6 is grounded through electric capacity c11；The negative electrode of diode d6 divides
It is not connected with the power input of cu control module 7, constant pressure and flow detection module 9.
Output module 6 comprises p-type mos pipe q2, N-shaped mos pipe q3, stabilivolt zd1, resistance r30, r40, r41.Mutual inductor
The cathode output end of l1 is connected with the drain electrode of p-type mos pipe q2；The source electrode of p-type mos pipe q2 is output module 6 cathode output end.
Stabilivolt zd1 is connected in parallel between the grid of p-type mos pipe q2 and drain electrode；Resistance r30 is in parallel with stabilivolt zd1.P-type mos pipe q2
Grid be connected with the source electrode of N-shaped mos pipe q3 through resistance r41.The drain electrode of N-shaped mos pipe q3 and the negative pole of mutual inductor l1
Outfan is connected.The drain electrode (i.e. cathode output end of mutual inductor l1) of N-shaped mos pipe q3 is output module 6 cathode output end.
The cathode output end of mutual inductor l1 and being connected with the grid of N-shaped mos pipe q3 through resistance r40.The positive pole of output module 6
Outfan is the cathode output end of this charger, and the cathode output end of output module 6 is the cathode output end of this charger.
Mcu control module 7 comprise mcu chip u1, light emitting diode led1, led2, blood pressure lowering chip u2, resistance r33, r36,
R44, r45, r46, r47, r48, electric capacity c17, c18, c19, c20.
The feedback pin of mcu chip u1 is connected with the cathode output end of output module 6 through resistance r47；And mcu core
The feedback pin of piece u1 is grounded respectively through resistance r48, electric capacity c20.The signal output pin of mcu chip u1 is through resistance r46
It is connected with the grid of the N-shaped mos pipe q3 of output module 6.The first light emitting control pin of mcu chip u1 sequentially passes through resistance
R44, light emitting diode led2 are grounded.The second light emitting control pin of mcu chip u1 sequentially passes through resistance r45, light emitting diode
Led1 is grounded.
The charging current detection pin of mcu chip u1 is connected with the cathode output end of output module 6 through resistance r36,
5th pin of mcu chip u1 and through electric capacity c18 ground connection.
The negative electrode of diode d6 is connected with the power pins of mcu chip u1 through resistance r33, blood pressure lowering chip u2.Mcu core
The power pins of piece u1 and respectively through electric capacity c17, c19 ground connection.
Pwm control module 8 comprise pwm chip u3, N-shaped mos pipe q1, diode d2, d3, resistance r18, r12, r13, r14,
R15, r16, r17, r18, r3, r5, electric capacity c5, c6, c7, light sensitive diode ic2.
Preferably, model ob2269 of pwm chip u3.The output pin (gate) of pwm chip u3 through resistance r18 with
The grid of N-shaped mos pipe q1 is connected；The grid of N-shaped mos pipe q1 is connected through resistance r3；The armature winding of transformator t1
Negative input is connected with the source electrode of N-shaped mos pipe q1；The drain electrode of N-shaped mos pipe q1 is grounded through resistance r5；Diode d3 with
Resistance r18 is in parallel.
The biasing winding of transformator t1 sequentially passes through the power pins (vdd) of resistance r12, diode d2 and pwm chip u3
It is connected.The over-current detection pin (sense) of pwm chip u3 is connected with the drain electrode of N-shaped mos pipe q1 through resistance r17；pwm
The over-current detection pin (sense) of chip u3 and through electric capacity c6 ground connection.
The outfan of prime rectification filtering module 3 sequentially passes through the startup pin of resistance r13, r14, r15 and pwm chip u3
(vin) it is connected, in order to start overcurrent protection (ocp) compensation function of pwm chip u3.Pwm chip u3 is had preferably
Ocp compensation characteristic, when the output voltage of prime rectification filtering module 3 changes, the startup pin (vin) of pwm chip u3
Electric current also can change, pwm chip u3 is automatically obtained compensation so that pwm chip by detecting the changing value of this electric current
U3 ocp curve in wider input voltage range is relatively flat, reaches the purpose of constant power output.Resistance r13, r14, r15
Resistance can adjust ocp compensation performance, this performance also be subject to pwm chip u3 export pwm frequency affected.When there is benefit
The phenomenon repaid, can increase the resistance of resistance r13, r14, r15 to reduce compensation ability.
The feedback signal pins (fb) of pwm chip u3 are grounded through light sensitive diode ic2, and through electric capacity c5 ground connection.
The concussion resistance of pwm chip u3 connects pin (ri) and is grounded through resistance r16.
Constant pressure and flow detection module 9 comprises voltage sampling unit 91, voltage regulation unit 92, current sampling unit 93, electricity
Stream comparing unit 94, constant pressure and flow signal output unit 95.Second rear class rectification filtering module 10 and constant pressure and flow signal output
Unit 95 is connected.First rear class rectification filtering module 5 is connected with voltage sampling unit 91；Voltage sampling unit 91 is through electricity
Pressure adjustment unit 92 is connected with constant pressure and flow signal output unit 95.The outfan of output module 6 and current sampling unit 93
It is connected；Current sampling unit 93 is connected with constant pressure and flow signal output unit 95 through overcurrent comparing unit 94.Constant pressure and constant
Stream signal output unit 95 is connected with pwm control module 8.
When charging starts, accumulator is in low-pressure state, and pwm control module 8 controls the output of power conversion module 4, makes
Obtain accumulator and carry out constant-current charge.Second rear class rectification filtering module 10 provides work electricity for constant pressure and flow signal output unit 95
Source.During constant-current charge, the charging current of the output to output module 6 for the current sampling unit 93 is sampled, electric current comparing unit
Charge current sample signal and reference signal are compared by 94, try to achieve battery charging current error signal；Electric current comparing unit 94
Adjust the constant pressure and flow control signal of constant pressure and flow signal output unit 95 output according to battery charging current error signal；Pwm controls mould
Block 8 according to adjustment after constant pressure and flow control signal adjust pwm dutycycle control power conversion module 4 output so that
The charging current of output module 5 output maintains constant current state.
During constant-current charge, the voltage of accumulator can be gradually increasing, when the voltage of accumulator rises to certain value,
Pwm control module 8 adjusts the output of power conversion module 4 so that accumulator carries out constant-voltage charge.During constant-voltage charge, voltage is adopted
The charging voltage that sample unit 91 exports to the first rear class rectification filtering module 5 is sampled, and voltage regulation unit 92 is according to voltage
The constant pressure and flow that the size of the charging voltage sampled signal of sampling unit 91 output exports to constant pressure and flow signal output unit 95
Control signal is adjusted；Charging voltage sampled signal is fed back to pwm control module 8 by constant pressure and flow signal output unit 95；
Pwm control module 8 according to charging voltage sampled signal adjust pwm dutycycle control power conversion module 4 output so that
Output module 5 output voltage maintains pressure constant state.
More specifically, voltage sampling unit 91 comprises resistance r24, r26.Voltage regulation unit 92 comprises controlled source of stable pressure
Ic3, electric capacity c12, c13, resistance r25.Current sampling unit 93 comprises resistance r32.Electric current comparing unit 94 comprises transport and placing device
Ic4, controlled source of stable pressure ic5, diode d7, resistance r34, resistance r37, resistance r38, resistance r39, electric capacity c14, c15, c16..
Constant pressure and flow signal output unit 95 comprises light emitting diode u3a, resistance r22, r23.The model of controlled source of stable pressure ic3, ic5
tl431.
The inverting input of transport and placing device ic4 is connected with the cathode output end of output module 6 through resistance r32；Transport and placing device
The normal phase input end of ic4 is sequentially passed through resistance r37, r38 and is connected with the cathode output end of output module 6.Controlled source of stable pressure ic5
Negative electrode and connect the common node of resistance r37 and resistance r38 respectively with reference to pole；The common node of resistance r37 and resistance r38 is simultaneously
And through electric capacity c16 ground connection.The plus earth of controlled source of stable pressure ic5.Electric capacity c14 is connected in parallel on the inverting input of transport and placing device ic4
And normal phase input end between.The inverting input of transport and placing device ic4 sequentially passes through the defeated of electric capacity c15, resistance r34 and transport and placing device ic4
Go out end to be connected.The normal phase input end of transport and placing device ic4 is grounded through resistance r39.The negative electrode of diode d6 sequentially passes through resistance
R23, r22, controlled source of stable pressure ic3 ground connection.The reference pole of controlled source of stable pressure ic3 is through the negative electrode phase of resistance r24 and diode d5
Connect, and through resistance r26 ground connection.The negative electrode of controlled source of stable pressure ic3 is through the outfan phase of diode d7 and transport and placing device ic4
Connect, and sequentially pass through electric capacity c12, resistance r25, c13 ground connection.Light emitting diode u3a is in parallel with resistance r22, and luminous two
Pole pipe u3a provides optical signal for light sensitive diode ic2.
The operation principle of the present invention is:
When charger input current is excessive, fuse f1 disconnects prevents charger to be burned.Mutual inductor tl1, tl2, tl3, electricity
Hold cx1, cx2 and multistage decay is carried out to differential mode conduction emi noise, eliminate emi effect of noise.220v electric main is through over commutation
Become pulse direct current, pulse direct current becomes smooth after the voltage stabilizing and filtering of electric capacity c1, c2, c4 after bridge heap db1 rectification
Unidirectional current.
The grid for N-shaped mos pipe q1 for the outfan of pwm chip u3 provides pulse signal, controls the conducting of N-shaped mos pipe q1
With cut-off；When the grid of N-shaped mos pipe q1 receives high level, N-shaped mos pipe q1 turns on, and the armature winding of transformator begins with electricity
Stream is by so that the secondary windings of transformator start storage energy；When the grid of N-shaped mos pipe q1 receives low level, N-shaped mos
Pipe q1 ends, and the armature winding no current of transformator t1 passes through；Now, the first secondary windings start to discharge.The of transformator t1
One secondary windings are contrary with the Same Name of Ends of armature winding, and when the armature winding of transformator t1 turns on, the first secondary windings start
Charge；When the armature winding of transformator t1 ends, the first secondary windings start to discharge through diode d5.Electric capacity c9, c10 couple
The impulse wave of diode d5 output is filtered and voltage stabilizing, enables to keep more stable voltage, mutually during diode d5 power on/off
The impulse wave that sense coil l1 mono- aspect exports to diode d5 is further filtered, and it is humorous that one side filtering circuit produces
Ripple, keeps stablizing of output voltage.
In the same manner, transformator t1 second subprime winding output energy sequentially pass through diode d6, the rectification of electric capacity c11,
After filtering, it is mcu chip u1 and light emitting diode u3a powers.
Because the non-ideal device of transformator t1, there is leakage inductance, and in actual track, also can there is stray inductance；Work as n
When type mos pipe q1 disconnects, the energy in leakage inductance and stray inductance can produce very high due to voltage spikes in the drain electrode of N-shaped mos pipe q1,
Thus leading to the damage of device.Electric capacity c3, resistance r8, diode d1 composition rcd absorbing circuit, electric capacity c3 is used for keeping in leakage inductance energy
Amount, resistance r8 dissipates it.
Mcu chip u1 is sampled to the charging voltage of accumulator by resistance r47, then by charging voltage sampled value with
Charging voltage threshold value compares；When determining accumulator by reversal connection or when not connecing, mcu chip u1 controls p by N-shaped mos pipe q3
Type mos pipe q2 ends, and accumulator stops charging.Mcu chip u1 detects the charging current of accumulator, resistance r46 by resistance r46
Charging current is changed into voltage signal, after mcu chip u1 will convert, voltage signal is compared with charging current threshold value, accumulator
In constant-voltage charge, charging current can be gradually reduced, when mcu chip u1 determines charging current and is less than charging current threshold value,
Then explanation accumulator fills with electricity, the signal output pin output low level of mcu chip u1, controls p by N-shaped mos pipe q3
Type mos pipe q2 ends, and accumulator stops charging.It is mcu chip that the voltage that blood pressure lowering chip u2 exports to diode d6 carries out blood pressure lowering
U1 provides working power.When accumulator charges, mcu chip u1 controls light emitting diode led1 flash of light.When accumulator is fully charged
When, mcu chip u1 controls light emitting diode led2 to light.
Pwm chip u3 receives the charge information of light emitting diode u3a feedback by light sensitive diode ic2；Pwm chip u3 root
According to charge information, adjust the size of the dutycycle of its pwm, thus being adjusted so that electric power storage to the voltage of transformator t1 output
Line precharge is first entered with small current constant current in pond；When treating that battery tension rises to certain value, pwm chip u3 regulates and controls N-shaped mos
Pipe q1, provides the electric current of accumulator constant-current charge；When the voltage of accumulator reaches close to saturation, pwm chip u3 regulates and controls n
Type mos pipe q1, accumulator starts to carry out constant-voltage charge with an overcharged voltage, until accumulator charges terminating.
Charge when starting, accumulator is in low-pressure state, pwm chip u3 controls the output of transformator t1 so that accumulator
Carry out constant-current charge.During constant-current charge, the charging current that resistance r32 exports to output module 6 cathode output end is sampled, and
Charge current sample signal is converted into voltage.This voltage delivers to the in-phase input end of transport and placing device ic4 by r32；Resistance r37,
The bleeder circuit of r39 composition, obtains reference voltage from the cathode output end of output module 6, and reference voltage is delivered to transport and placing device
The inverting input of ic4.Transport and placing device ic4 says that charge current sample signal and reference voltage are compared, one error letter of output
Number, feed back to controlled source of stable pressure ic3, thus adjusting the brightness of light emitting diode u3a.Pwm chip u3 passes through light sensitive diode
Ic2 receives the charging current information of light emitting diode u3a feedback；The dutycycle of adjustment pwm, makes charging current be maintained at constant current shape
State.
During constant-current charge, the voltage of accumulator can be gradually increasing, when the voltage of accumulator rises to certain value,
Pwm chip u3 controls the output of transformator t1 so that accumulator carries out constant-voltage charge.Resistance r24, r26 are to the first rear class rectification
The charging voltage of filtration module 9 output is sampled, and feeds back to and feed back to controlled source of stable pressure ic3.When charging voltage rise or
During reduction, the magnitude of voltage of controlled source of stable pressure ic3 adjusts therewith, thus adjusting the brightness of light emitting diode u3a.Pwm chip
U3 receives the charging voltage information of light emitting diode u3a feedback, and then the dutycycle of adjustment pwm by light sensitive diode ic2, makes
Charging voltage is maintained at pressure constant state.
Above-described is only the preferred embodiment of the present invention, the invention is not restricted to above example.It is appreciated that this
Skilled person directly derive without departing from the basic idea of the present invention or associate other improve and change
All it is considered as being included within protection scope of the present invention.
Claims (9)
1. a kind of intelligent charger for electric bicycle it is characterised in that:
Including lightning-protection module, emi filtration module, prime rectification filtering module, power conversion module, the first rear class rectifying and wave-filtering mould
Block, output module, mcu control module, pwm control module, constant pressure and flow detection module, the second rear class rectification filtering module；
Described lightning-protection module, emi filtration module, prime rectification filtering module, power conversion module, the first rear class rectifying and wave-filtering mould
Block, output module are sequentially connected；
Described first rear class rectification filtering module is connected with pwm control module through constant pressure and flow detection module；
Described output module is connected with pwm control module through constant pressure and flow detection module；
Described pwm control module is connected with power conversion module；
Described mcu control module is connected with output module circulation；
Described power conversion module and being connected with the second rear class rectification filtering module；Described second rear class rectification filtering module
It is connected with mcu control module, constant pressure and flow detection module respectively.
2. intelligent charger for electric bicycle according to claim 1 it is characterised in that:
It is more single that described constant pressure and flow detection module comprises voltage sampling unit, voltage regulation unit, current sampling unit, electric current
Unit, constant pressure and flow signal output unit；
Described second rear class rectification filtering module is connected with constant pressure and flow signal output unit；
Described first rear class rectification filtering module is connected with voltage sampling unit；Described voltage sampling unit is through voltage-regulation
Unit is connected with constant pressure and flow signal output unit；
The outfan of described output module is connected with current sampling unit；Described current sampling unit is through overcurrent comparing unit
It is connected with constant pressure and flow signal output unit；
Described constant pressure and flow signal output unit is connected with described pwm control module.
3. intelligent charger for electric bicycle according to claim 1 it is characterised in that:
Described mcu control module comprises mcu chip u1, resistance r36, r46, r47, r48；
The feedback pin of mcu chip u1 is connected with the cathode output end of output module through resistance r47；And mcu chip u1
Feedback pin through resistance r48 be grounded；
The signal output pin of mcu chip u1 is connected with output module through resistance r46；
The charging current detection pin of mcu chip u1 is connected with the input of constant pressure and flow detection module through resistance r36.
4. intelligent charger for electric bicycle according to claim 1 it is characterised in that:
Described output module comprises p-type mos pipe q2, N-shaped mos pipe q3, stabilivolt zd1, resistance r30, r40, r41；
The cathode output end of described first rear class rectification filtering module is connected with the drain electrode of p-type mos pipe q2；P-type mos pipe q2's
Source electrode is output module cathode output end；
Stabilivolt zd1 is connected in parallel between the grid of p-type mos pipe q2 and drain electrode；Resistance r30 is in parallel with stabilivolt zd1；
The grid of p-type mos pipe q2 is connected with the source electrode of N-shaped mos pipe q3 through resistance r41；
The drain electrode of N-shaped mos pipe q3 is connected with the cathode output end of described first rear class rectification filtering module；N-shaped mos pipe q3's
Drain as output module cathode output end；
The cathode output end of described first rear class rectification filtering module and being connected with the grid of N-shaped mos pipe q3 through resistance r40
Connect；The grid of N-shaped mos pipe q3 and being connected with mcu control module.
5. intelligent charger for electric bicycle according to claim 1 it is characterised in that:
Described power conversion module comprises transformator t1, resistance r8, r10, r11, electric capacity c3, diode d1；
Resistance r8 is connected between the armature winding of transformator t1 through diode d1；Resistance r11 connects resistance r8 through electric capacity c3
Common node with diode d1；Resistance r10 is parallel with one another with resistance r11；
First secondary windings of transformator t1 are connected with described first rear class rectification filtering module；The second subprime of transformator t1
Winding is connected with mcu control module.
6. intelligent charger for electric bicycle according to claim 5 it is characterised in that:
Described pwm control module comprise pwm chip u3, N-shaped mos pipe q1, diode d2, d3, resistance r18, r12, r13, r14,
R15, r16, r17, r18, r3, r5, electric capacity c5, c6, c7, light sensitive diode ic2；
The output pin of pwm chip u3 is connected with the grid of N-shaped mos pipe q1 through resistance r18；The grid warp of N-shaped mos pipe q1
Cross resistance r3 to be connected；The negative input of the armature winding of transformator t1 is connected with the source electrode of N-shaped mos pipe q1；N-shaped mos
The drain electrode of pipe q1 is grounded through resistance r5；Diode d3 is in parallel with resistance r18；
The biasing winding of transformator t1 is sequentially passed through resistance r12, diode d2 and is connected with the power pins of pwm chip u3；pwm
The over-current detection pin of chip u3 is connected with the drain electrode of N-shaped mos pipe q1 through resistance r17；The over-current detection of pwm chip u3 is drawn
Foot and through electric capacity c6 ground connection.
7. intelligent charger for electric bicycle according to claim 1 it is characterised in that:
Described constant pressure and flow detection module comprises transport and placing device ic4, controlled source of stable pressure ic3, ic5, diode d7, light emitting diode
U3a, resistance r22, resistance r23, resistance r24, resistance r25, resistance r26, resistance r32, resistance r34, resistance r37, resistance r38,
Resistance r39, electric capacity c12, c13, c15, c16；
The inverting input of transport and placing device ic4 is connected with the cathode output end of described output module through resistance r32；Transport and placing device
The normal phase input end of ic4 is sequentially passed through resistance r37, r38 and is connected with the cathode output end of described output module；
The negative electrode of controlled source of stable pressure ic5 and the common node connecting resistance r37 and resistance r38 with reference to pole respectively；Resistance r37 and electricity
Hinder the common node of r38 and through electric capacity c16 ground connection；
The plus earth of controlled source of stable pressure ic5；Electric capacity c14 be connected in parallel on the inverting input of transport and placing device ic4 and normal phase input end it
Between；The inverting input of transport and placing device ic4 sequentially passes through electric capacity c15, resistance r34 is connected with the outfan of transport and placing device ic4；Amplifier
The normal phase input end of device ic4 is grounded through resistance r39；Described second rear class rectification filtering module sequentially pass through resistance r23, r22,
Controlled source of stable pressure ic3 ground connection；The reference pole of controlled source of stable pressure ic3 is connected with the negative electrode of diode d5 through resistance r24, and
Through resistance r26 ground connection；The negative electrode of controlled source of stable pressure ic3 is connected with the outfan of transport and placing device ic4 through diode d7, and
Sequentially pass through electric capacity c12, resistance r25, c13 ground connection；Light emitting diode u3a is in parallel with resistance r22, and light emitting diode u3a is
Described pwm control module provides optical signal.
8. a kind of intelligent charger for electric bicycle it is characterised in that:
Including lightning-protection module, emi filtration module, prime rectification filtering module, power conversion module, the first rear class rectifying and wave-filtering mould
Block, output module, mcu control module, pwm control module, constant pressure and flow detection module, the second rear class rectification filtering module；
Described lightning-protection module, emi filtration module, prime rectification filtering module, power conversion module, the first rear class rectifying and wave-filtering mould
Block, output module are sequentially connected；
The charging current information that pwm control module is fed back according to constant pressure and flow detection module, first passes through control power conversion module
Accumulator is made to carry out constant-current charge；During constant-current charge, the voltage of accumulator rises；
When the voltage of accumulator rises to predetermined value, pwm control module adjustment power conversion module makes accumulator carry out perseverance
Pressure charges；During constant-voltage charge, pwm control module adjusts work(according to the charging voltage information that constant pressure and flow detection module feeds back
Rate modular converter is so that accumulator maintains constant-voltage charge；
During constant-voltage charge, charging current is gradually reduced；The detection of mcu control module is entered to the charging current of output module output
Row detection；When charging current is less than predetermined value, mcu control module controls output module to disconnect, and accumulator charges and terminates.
9. intelligent charger for electric bicycle according to claim 1 it is characterised in that:
It is more single that described constant pressure and flow detection module comprises voltage sampling unit, voltage regulation unit, current sampling unit, electric current
Unit, constant pressure and flow signal output unit；
Described second rear class rectification filtering module provides working power for constant pressure and flow signal output unit；
During constant-current charge, the charging current of the output to output module for the described current sampling unit is sampled；Electric current is more single
Charge current sample signal and reference signal are compared by unit, try to achieve battery charging current error signal；Electric current comparing unit according to
Battery charging current error signal adjusts the constant pressure and flow control signal of constant pressure and flow signal output unit output；Pwm control module root
To control the output of power conversion module according to the dutycycle that the constant pressure and flow control signal after adjustment adjusts pwm so that exporting mould
The charging current of block output maintains constant current state；
During constant-voltage charge, described voltage sampling unit is adopted to the charging voltage of described first rear class rectification filtering module output
Sample；The charging voltage size adjustment constant pressure and flow signal output unit that described voltage regulation unit is sampled according to voltage sampling unit
The constant pressure and flow control signal of output；Described pwm control module adjusts pulse duration according to the size of constant pressure and flow control signal
Ratio is thus control the energy of power conversion module to export so that the charging voltage of output module output maintains pressure constant state.
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