CN107839510A - A kind of electric car accumulator cell charging and discharging intelligence control system - Google Patents
A kind of electric car accumulator cell charging and discharging intelligence control system Download PDFInfo
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- CN107839510A CN107839510A CN201710896502.0A CN201710896502A CN107839510A CN 107839510 A CN107839510 A CN 107839510A CN 201710896502 A CN201710896502 A CN 201710896502A CN 107839510 A CN107839510 A CN 107839510A
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- 238000007599 discharging Methods 0.000 title claims abstract description 22
- 238000001914 filtration Methods 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims description 32
- 238000004804 winding Methods 0.000 claims description 27
- 230000005611 electricity Effects 0.000 claims description 13
- 238000005070 sampling Methods 0.000 claims description 13
- 230000005347 demagnetization Effects 0.000 claims description 9
- 230000003993 interaction Effects 0.000 claims description 6
- 230000009466 transformation Effects 0.000 claims description 6
- 238000009825 accumulation Methods 0.000 claims description 4
- 230000003321 amplification Effects 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 230000003068 static effect Effects 0.000 claims description 4
- 230000001629 suppression Effects 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 3
- 238000011897 real-time detection Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 8
- 238000005538 encapsulation Methods 0.000 abstract description 3
- 230000001965 increasing effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000007726 management method Methods 0.000 description 3
- 238000013499 data model Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 241001125929 Trisopterus luscus Species 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Classifications
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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
- 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]
- B60L58/14—Preventing excessive discharging
-
- 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
-
- 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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- H02J7/045—
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
-
- 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
- B60L2210/00—Converter types
- B60L2210/30—AC to DC converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/123—Suppression of common mode voltage or current
-
- 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
Abstract
The invention discloses a kind of electric car accumulator cell charging and discharging intelligence control system, includes inverse-excitation type switch power-supply and connected charge and discharge control module；The inverse-excitation type switch power-supply includes EMI filtration modules, AC/DC conversion equipments, high frequency transformer and loop compensation module；The present invention is analyzed by the change to voltage and current in battery operation, the progress of work of battery is rationally controlled, so as to ensure and improve the service life cycle of battery；The AC DC conversion equipments of the present invention eliminate outside start-up circuit, substantially reduce the power consumption of actuating section；The present invention is started using closing inside back cover pole pipe and realize, stand-by power consumption is low, and speed is fast, and the present invention is using encapsulation technique is closed, without high-pressure process, it is easy to accomplish, it is cost-effective；For the present invention when output short-circuit, system improves stability automatically into fixed frequency modes.
Description
Technical field
The invention belongs to field of intelligent monitoring, more particularly to a kind of electric car accumulator cell charging and discharging intelligence control system.
Background technology
Battery is widely used among a variety of industrial circles and daily life, its service life and charge less,
Overcharge and put excessively closely related.How to be effectively ensured and improve the service life of battery is in battery management system design
Urgent problem.
The design of battery management system is mainly carried out in terms of being charged and discharged two, and different application scenarios are taken
Charge and discharge control strategy also emphasize particularly on different fields.At present, charging strategy mainly uses three stage charging system, the hotter mainly arteries and veins of research
Punching charging, it is intended to avoid battery charge less with overcharging；Electric discharge strategy is main by the way of threshold voltage is set, it is intended to avoids storing
Battery, which is crossed, to be put.
Switching Power Supply is widely used in almost all of electronic equipment with the features such as small-sized, light weight and high efficiency, is to work as
Modern electronics and information industry develops rapidly a kind of indispensable power mode.Primary side feedback Switching Power Supply adds because saving optocoupler
TL431 structure, the space on system board is saved, reduce cost and improve the reliability of system, in power management
In be able to fast-developing and extensive use.
The content of the invention
The technical problems to be solved by the invention are that the deficiency for being directed to background provides a kind of electric car accumulator cell charging and discharging intelligence
Energy control system, is analyzed by the change to voltage and current in battery operation, rationally controls the work of battery
Make process, so as to ensure and improve the service life cycle of battery.
The present invention uses following technical scheme to solve above-mentioned technical problem
A kind of electric car accumulator cell charging and discharging intelligence control system, it is automatically controlled comprising inverse-excitation type switch power-supply and connected charge and discharge
Molding block；
The inverse-excitation type switch power-supply, charged for civil power to be converted into low-voltage DC for battery；
The charge and discharge control module, is controlled for the discharge and recharge in real time to battery；
The inverse-excitation type switch power-supply includes EMI filtration modules, AC/DC conversion equipments, high frequency transformer and loop compensation mould
Block；
Wherein, city is electrically accessed EMI filtration modules, for filtering out common mode and DM EMI in utility grid；
The EMI filtration modules connect high frequency transformer by AC/DC conversion equipments, for the alternating current of input to be converted into directly
Stream electricity, and then complete transformation by high frequency transformer；
The loop compensation module is connected with the output end of high frequency transformer and the input of AC/DC conversion equipments respectively, is used for
The output voltage of high frequency transformer carries out loop compensation；
The EMI filtration modules include common mode inductance, X electric capacity, Y capacitance and bleeder resistance；
The common mode inductance is made up of the coil of two coilings in the same direction, for eliminating loop difference current；
The X electric capacity is attempted by common mode inductance both sides, for eliminating DM EMI；
The Y capacitance is connected across output end and series connection neutral earthing, is disturbed for suppression common mode；
The bleeder resistance is used to eliminate the accumulation of static electricity occurred in wave filter；
The charge and discharge control module include charging control circuit, battery, charge/discharge control circuit, charging current detection module,
Low noise amplifier circuit, terminal voltage detecting module, micro controller module, discharge current detection module, human-computer interaction module, PWM
Driver；
Inverse-excitation type switch power-supply connects battery by charging control circuit, for controlling battery to charge；
Battery and charge/discharge control circuit, for controlling battery discharging；
Charging current detection module, voltage detection module, discharge current detection module are respectively by low noise amplifier circuit and micro-
Controller module connects, the electric discharge electricity for voltage, battery in the charging current of real-time detection battery respectively, battery
Stream, is uploaded to micro controller module by the electric signal of collection；
Human-computer interaction module is connected with micro controller module, for checking the voltage status and charging and discharging currents state of battery,
And for setting microcontroller parameter threshold；
The pwm driver connects with micro controller module, charging control circuit, charge/discharge control circuit respectively, is adopted for basis
The voltage and current parameters of collection, and then drive the pwm signal of charging control circuit and charge/discharge control circuit FET；
The low-noise amplifier includes LNA, power splitter, the first wave filter, the second wave filter, the first amplifier, the second amplification
Device, synthesizer, the 3rd amplifier and the 3rd wave filter, wherein, the input of LNA output end connection power splitter, and power splitter
Output end connect the input of first and second wave filter respectively, the output end of first and second wave filter respectively via first,
Two amplifiers connect the input of synthesizer, and the output end of the synthesizer connects the input of the 3rd wave filter via the 3rd amplifier
End；
The AC-DC conversion equipments include flyback transformer, rectification filtering module, start-up circuit, startup control and low pressure lock
Cover half block, peak current detection, sampling and keep module, error amplifier, CV control modules, demagnetization time detecting module, CC controls
Molding block, PFM Logic control modules, drive module, power switch pipe M1；The start-up circuit includes a power switch pipe Q1,
The primary side winding Np of flyback transformer upper end connection external input voltage Vin ends, primary side winding Np lower end connection
Start-up circuit；The outside rectification filtering module of the secondary side winding Ns connections of the flyback transformer；The auxiliary of the transformer around
Group Naux connects the input of sampling and keep module and time detecting module of demagnetizing, the inverse-excitation type transformation through electric resistance partial pressure respectively
The assists winding Naux of device is sent into vdd terminal connection through diode and starts control and low pressure locking module；The one of the start-up circuit
End is also fed into vdd terminal connection and starts control and low pressure locking module, other end connection power switch pipe M1 drain terminal；The power
Switching tube M1 source connects the input of peak current detection through CS ends；The output end connection PFM of the peak current detection
The input of logic control；The output end connection voltage output Vout ends of the rectification filtering module；The sampling and keep module
Output end pass sequentially through error amplifier, CV control modules connection PFM Logic control modules input；The demagnetization time
The output end of detection module is also connected to the input of PFM logic controls, the output of PFM Logic control modules through CC control modules
End controls power switch pipe M1 and power switch pipe Q1 break-make by drive module, so as to control flyback transformer primary side electric
The break-make on road.
As a kind of further preferred scheme of electric car accumulator cell charging and discharging intelligence control system of the present invention, the microcontroller
Device module uses AVR series monolithics.
As a kind of further preferred scheme of electric car accumulator cell charging and discharging intelligence control system of the present invention, the battery
Terminal voltage between the V of 10.5 V~14.0.
As a kind of further preferred scheme of electric car accumulator cell charging and discharging intelligence control system of the present invention, the charging electricity
Stream detection module uses Hall sensor.
As a kind of further preferred scheme of electric car accumulator cell charging and discharging intelligence control system of the present invention, the electric discharge electricity
Stream detection module also uses Hall sensor.
The present invention compared with prior art, has following technique effect using above technical scheme：
The present invention is analyzed by the change to voltage and current in battery operation, rationally controls the work of battery
Process, so as to ensure and improve the service life cycle of battery；
The AC-DC conversion equipments of the present invention eliminate outside start-up circuit, substantially reduce the power consumption of actuating section；The present invention uses
Close inside back cover pole pipe and realize and start, stand-by power consumption is low, and speed is fast, and the present invention, without high-pressure process, is easy to real using encapsulation technique is closed
It is existing, cost-effective；For the present invention when output short-circuit, system improves stability automatically into fixed frequency modes；
The EMI filtration modules of the present invention include common mode inductance, X electric capacity, Y capacitance and bleeder resistance, can effectively filter out in power network
Common mode and DM EMI, the common mode inductance is made up of the coil of two coilings in the same direction, for eliminating loop difference current；X
Electric capacity is attempted by common mode inductance both sides, for eliminating DM EMI；Y capacitance is connected across output end and series connection neutral earthing, is used for
Suppression common mode is disturbed；Bleeder resistance is used to eliminate the accumulation of static electricity occurred in wave filter.
Brief description of the drawings
Fig. 1 is present system structure principle chart；
Fig. 2 is the circuit diagram of AC-DC conversion equipments of the present invention；
Fig. 3 is low noise amplifier circuit circuit diagram of the present invention.
Embodiment
Technical scheme is described in further detail below in conjunction with the accompanying drawings：
As shown in figure 1, a kind of electric car accumulator cell charging and discharging intelligence control system, comprising inverse-excitation type switch power-supply and is connected thereto
Charge and discharge control module；
The inverse-excitation type switch power-supply, charged for civil power to be converted into low-voltage DC for battery；
The charge and discharge control module, is controlled for the discharge and recharge in real time to battery；
The inverse-excitation type switch power-supply includes EMI filtration modules, AC/DC conversion equipments, high frequency transformer and loop compensation mould
Block；
Wherein, city is electrically accessed EMI filtration modules, for filtering out common mode and DM EMI in utility grid；
The EMI filtration modules connect high frequency transformer by AC/DC conversion equipments, for the alternating current of input to be converted into directly
Stream electricity, and then complete transformation by high frequency transformer；
The loop compensation module is connected with the output end of high frequency transformer and the input of AC/DC conversion equipments respectively, is used for
The output voltage of high frequency transformer carries out loop compensation；
Wherein, inverse-excitation type switch power-supply：The specific design index of Switching Power Supply is as follows：Power frequency inputs AC 220（1±20%）V；Directly
Stream output 18 V/10 A and 10 V/0.6 A；Switching frequency fS=65 kHz, power output Pout=180 W, operating efficiency η >=
85%, maximum duty cycle Dmax=0.45, electric current continuous type mode of operation（CCM）.Specific design mainly includes 3 parts：EMI is filtered
Ripple, high frequency transformer and loop compensation.
EMI filtration modules：Electromagnetic interference caused by Switching Power Supply（EMI）Mainly based on Conduction Interference and near-field interference,
Including 2 kinds of states of common mode disturbances and DM EMI.Electromagnetic interface filter can effectively filter out common mode and DM EMI in power network.EMI
Filter circuit is mainly made up of common mode inductance, X electric capacity, Y capacitance and bleeder resistance.Common mode inductance by two coilings in the same direction coil
Composition, for eliminating loop difference current；X electric capacity is attempted by common mode inductance both sides, for eliminating DM EMI；Y capacitance bridges
In output end and series connection neutral earthing, disturbed for suppression common mode；Bleeder resistance is used to eliminate what is be likely to occur in wave filter
Accumulation of static electricity.
High frequency transformer：High frequency transformer design be Switching Power Supply design in most important link, transformer performance it is excellent
The bad job stability and performance for directly affecting Switching Power Supply.
The charge and discharge control module include charging control circuit, battery, charge/discharge control circuit, charging current detection,
Terminal voltage detecting module, low noise send out circuit big, micro controller module, discharge current detection, human-computer interaction module, PWM drivings
Device；
Inverse-excitation type switch power-supply connects battery by charging control circuit, for controlling battery to charge；
Battery and charge/discharge control circuit, for controlling battery discharging；
Charging current detection, terminal voltage detecting, discharge current detection connect with micro controller module respectively, for inspection in real time respectively
Survey the charging current of battery, voltage, the discharge current of battery in battery, the electric signal of collection is uploaded to micro-control
Device module processed；
As shown in figure 3, the low-noise amplifier includes LNA, power splitter, the first wave filter, the second wave filter, the first amplification
Device, the second amplifier, synthesizer, the 3rd amplifier and the 3rd wave filter, wherein, the input of LNA output end connection power splitter
End, and the output end of power splitter connects the input of first and second wave filter, the output end point of first and second wave filter respectively
The input of synthesizer is not connected via first and second amplifier, the output end of the synthesizer connects the 3rd via the 3rd amplifier
The input of wave filter；
Human-computer interaction module is connected with micro controller module, for checking the voltage status and charging and discharging currents state of battery,
And for setting microcontroller parameter threshold；
The pwm driver connects with micro controller module, charging control circuit, charge/discharge control circuit respectively, is adopted for basis
The voltage and current parameters of collection, and then drive the pwm signal of charging control circuit and charge/discharge control circuit FET.
As shown in Fig. 2 a kind of super-low standby power consumption primary side feedback switching power circuit, specific as follows：The switch power supply
Road include flyback transformer, rectification filtering module, start-up circuit, start control and low pressure locking module, peak current detection,
Sampling and keep module, error amplifier, CV control modules, demagnetization time detecting module, CC control modules, PFM logic control moulds
Block, drive module, power switch pipe M1；The start-up circuit includes a power switch pipe Q1, the original of the flyback transformer
Side winding Np upper end connection external input voltage Vin ends, primary side winding Np lower end connection start-up circuit；The inverse-excitation type becomes
The outside rectification filtering module of the secondary side winding Ns connections of depressor；The assists winding Naux of the transformer connects respectively through electric resistance partial pressure
The input of sampling and keep module and time detecting module of demagnetizing is connect, the assists winding Naux of the flyback transformer is through two poles
Pipe is sent into vdd terminal connection and starts control and low pressure locking module；One end of the start-up circuit is also fed into vdd terminal connection and starts control
System and low pressure locking module, other end connection power switch pipe M1 drain terminal；The source of the power switch pipe M1 connects through CS ends
Connect the input of peak current detection；The input of the output end connection PFM logic controls of the peak current detection；It is described whole
Flow the output end connection voltage output Vout ends of filtration module；The output end of the sampling and keep module passes sequentially through error amplification
The input of device, CV control modules connection PFM Logic control modules；The output end of the demagnetization time detecting module controls through CC
Module is also connected to the input of PFM logic controls, and the output end of PFM Logic control modules controls power to open by drive module
Pipe M1 and power switch pipe Q1 break-make is closed, so as to control the break-make of flyback transformer primary circuit.
The flyback transformer is used to realize energy transmission and electrical equipment isolation；Rectification filtering module is filtered for output voltage
Ripple；Start the size of control and low pressure locking module for limiting chip internal power supply terminal voltage, with anti-misoperation；Sampling is kept
Module is used to realize the sampling to feedback voltage, with the comparison with reference voltage later；Error amplifier, which is used to realize, to be sampled
The error of voltage and reference voltage is amplified；PFM logic controls are used for the control for realizing voltage against frequency；Crest voltage, which detects, to be used for
Primary current feeds back；Drive module is used to drive Q1 and M1, realizes primary side break-make.
The purpose of the present invention solves traditional primary side feedback switch power supply system, because peripheral component power consumption causes system to be treated
The problem of machine power consumption is larger, and toggle speed is slow.A kind of super-low standby power consumption primary side feedback switching power circuit is provided for this, its
Unlike existing Switching Power Supply：System saves outside start-up circuit, is started by closing inside back cover pole pipe and realizing.
The physical circuit figure of the primary side feedback Switching Power Supply of the super-low standby power consumption：Electricity is switched based on inverse-excitation type primary side feedback
Source topological structure, outside include flyback transformer（Including primary side winding Np, secondary side winding Ns, assists winding Naux）, rectification
Filter circuit, resistance R1, R2 partial pressure；Control section includes starting control and low pressure locking module, and sampling and keep module, error are put
Big device, CV control modules, time detecting of demagnetizing, CC control modules, PFM logic controls, peak current detection, base drive mould
Block, raster data model, power switch pipe M1, close inside back cover pole pipe Q1.Chip power supply end Starting mode is improved, is integrated with power switch
Pipe, employs conjunction encapsulation technique.
Operation principle：
External input voltage Vin closes inside back cover pole pipe Q1 and resistance R by flyback transformer primary side winding Np connectionsBC, resistance RBC
Base stage to triode Q1 provides electric current, Q1 conductings, through diode D2, give control chip vdd terminal electric capacity C1Charging, works as vdd voltage
When being increased to inner setting voltage VH, the upset of UVLO signals, system start completion, chip start-up operation, now vdd voltage is by auxiliary
Winding Naux is helped to provide.
R in circuitBCIt is a big resistance, usually 10M Ω, electric current is provided to the grid for closing inside back cover pole pipe.Big resistance
RBCThe power consumption very little consumed when system works, and in primary side conducting phase RBCBoth end voltage is zero, does not consume power consumption, simultaneously
Electric capacity C1 charging current is Q1 grid current, is resistance RBCβ times of electric current（β is about 30）, start the time greatly shorten.
After chip is started working, raster data model and base drive make M1, Q1 conductings, primary side conducting, according to transformation first
Device principle, secondary side winding voltage is on the contrary, output diode DOAnode is low level, by secondary side is not turned on.When primary side turns on,
Input voltage passes through primary side winding, Q1, M1, RCSGround is linked to, primary side induction charging, primary current is gradually increasing, and this electric current leads to
Cross RCSIn the form of a voltage from current detecting（CS）End is fed back in chip, when CS terminal voltages reach inner setting, peak value electricity
Detection comparator output switching activity is flowed, controls drive module to make M1, Q1 shut-offs, primary side shut-off by logic circuit.It is former according to inductance
Reason, inductive current can not be mutated, secondary side voltage reversal, output diode DOConducting, secondary side conducting.Secondary side conducting phase, that is, move back
In the magnetic stage, secondary side winding Ns voltage i.e. output voltage reflect onto assists winding Naux, pass through electric resistance partial pressure R1, R2, obtain
To FB voltages, a series of circuits such as the sampled holding of FB voltages is compared with reference voltage, so as to control Q1, M1 switching frequency,
And then control output voltage.So the primary side winding Np and secondary side winding Ns of flyback transformer are not simultaneously turned on.
The work of chip is divided into three kinds of mode of operations：Fixed frequency modes, CC（Constant current）Pattern, CV（Constant pressure）Pattern.When
FB voltages VFB<During 0.5V, fixed frequency modes are operated in（38KHz）, 0.5V<VFB<During 2V（Vref1=2V）, switch to CC works
Operation mode.Chip startup stage switches to CV working conditions when completing, and when load continues increase, system back switches to CC works
Operation mode.
When chip is started working, fixed frequency control signal driving Q1 and M1 conductings, input voltage is carried in primary side winding
Both ends, the referred to as conducting of primary side branch road, conducting phase.Primary current is gradually increasing, current detecting end（CS）Voltage is gradually increasing, when
When it rises to internal reference voltage Vref2, peak current detection comparator output switching activity, Q1, M1 are turned off, and secondary side winding is led
Logical, energy release, demagnetization phase starts.
In demagnetization phase, output voltage is reflected on primary side assists winding Naux with certain proportion, is divided through resistance R1, R2
Pressure, it is sent into pressure feedback port（FB）.Again by sampling hold circuit, the voltage at demagnetization phase 3/4 is obtained（Voltage herein is more
Add accurately reaction output voltage）, and reference voltage is together sent into error amplifier.Ladder raised voltage is produced by oscillator,
Through PFM pulse frequency modulateds, frequency control signal is produced, controls drive circuit.
Claims (5)
- A kind of 1. electric car accumulator cell charging and discharging intelligence control system, it is characterised in that：Comprising inverse-excitation type switch power-supply and and its The charge and discharge control module of connection；The inverse-excitation type switch power-supply, charged for civil power to be converted into low-voltage DC for battery；The charge and discharge control module, is controlled for the discharge and recharge in real time to battery；The inverse-excitation type switch power-supply includes EMI filtration modules, AC/DC conversion equipments, high frequency transformer and loop compensation mould Block；Wherein, city is electrically accessed EMI filtration modules, for filtering out common mode and DM EMI in utility grid；The EMI filtration modules connect high frequency transformer by AC/DC conversion equipments, for the alternating current of input to be converted into directly Stream electricity, and then complete transformation by high frequency transformer；The loop compensation module is connected with the output end of high frequency transformer and the input of AC/DC conversion equipments respectively, is used for The output voltage of high frequency transformer carries out loop compensation；The EMI filtration modules include common mode inductance, X electric capacity, Y capacitance and bleeder resistance；The common mode inductance is made up of the coil of two coilings in the same direction, for eliminating loop difference current；The X electric capacity is attempted by common mode inductance both sides, for eliminating DM EMI；The Y capacitance is connected across output end and series connection neutral earthing, is disturbed for suppression common mode；The bleeder resistance is used to eliminate the accumulation of static electricity occurred in wave filter；The charge and discharge control module include charging control circuit, battery, charge/discharge control circuit, charging current detection module, Low noise amplifier circuit, terminal voltage detecting module, micro controller module, discharge current detection module, human-computer interaction module, PWM Driver；Inverse-excitation type switch power-supply connects battery by charging control circuit, for controlling battery to charge；Battery and charge/discharge control circuit, for controlling battery discharging；Charging current detection module, voltage detection module, discharge current detection module are respectively by low noise amplifier circuit and micro- Controller module connects, the electric discharge electricity for voltage, battery in the charging current of real-time detection battery respectively, battery Stream, is uploaded to micro controller module by the electric signal of collection；Human-computer interaction module is connected with micro controller module, for checking the voltage status and charging and discharging currents state of battery, And for setting microcontroller parameter threshold；The pwm driver connects with micro controller module, charging control circuit, charge/discharge control circuit respectively, is adopted for basis The voltage and current parameters of collection, and then drive the pwm signal of charging control circuit and charge/discharge control circuit FET；The low-noise amplifier includes LNA, power splitter, the first wave filter, the second wave filter, the first amplifier, the second amplification Device, synthesizer, the 3rd amplifier and the 3rd wave filter, wherein, the input of LNA output end connection power splitter, and power splitter Output end connect the input of first and second wave filter respectively, the output end of first and second wave filter respectively via first, Two amplifiers connect the input of synthesizer, and the output end of the synthesizer connects the input of the 3rd wave filter via the 3rd amplifier End；The AC-DC conversion equipments include flyback transformer, rectification filtering module, start-up circuit, startup control and low pressure lock Cover half block, peak current detection, sampling and keep module, error amplifier, CV control modules, demagnetization time detecting module, CC controls Molding block, PFM Logic control modules, drive module, power switch pipe M1；The start-up circuit includes a power switch pipe Q1, The primary side winding Np of flyback transformer upper end connection external input voltage Vin ends, primary side winding Np lower end connection Start-up circuit；The outside rectification filtering module of the secondary side winding Ns connections of the flyback transformer；The auxiliary of the transformer around Group Naux connects the input of sampling and keep module and time detecting module of demagnetizing, the inverse-excitation type transformation through electric resistance partial pressure respectively The assists winding Naux of device is sent into vdd terminal connection through diode and starts control and low pressure locking module；The one of the start-up circuit End is also fed into vdd terminal connection and starts control and low pressure locking module, other end connection power switch pipe M1 drain terminal；The power Switching tube M1 source connects the input of peak current detection through CS ends；The output end connection PFM of the peak current detection The input of logic control；The output end connection voltage output Vout ends of the rectification filtering module；The sampling and keep module Output end pass sequentially through error amplifier, CV control modules connection PFM Logic control modules input；The demagnetization time The output end of detection module is also connected to the input of PFM logic controls, the output of PFM Logic control modules through CC control modules End controls power switch pipe M1 and power switch pipe Q1 break-make by drive module, so as to control flyback transformer primary side electric The break-make on road.
- A kind of 2. electric car accumulator cell charging and discharging intelligence control system according to claim 1, it is characterised in that：The micro-control Device module processed uses AVR series monolithics.
- A kind of 3. electric car accumulator cell charging and discharging intelligence control system according to claim 1, it is characterised in that：The electric power storage The terminal voltage in pond is between the V of 10.5 V~14.0.
- A kind of 4. electric car accumulator cell charging and discharging intelligence control system according to claim 1, it is characterised in that：The charging Current detection module uses Hall sensor.
- A kind of 5. electric car accumulator cell charging and discharging intelligence control system according to claim 1, it is characterised in that：The electric discharge Current detection module also uses Hall sensor.
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| CN201710896502.0A CN107839510A (en) | 2017-09-28 | 2017-09-28 | A kind of electric car accumulator cell charging and discharging intelligence control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710896502.0A CN107839510A (en) | 2017-09-28 | 2017-09-28 | A kind of electric car accumulator cell charging and discharging intelligence control system |
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| CN107839510A true CN107839510A (en) | 2018-03-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110379145A (en) * | 2019-06-13 | 2019-10-25 | 扬州工业职业技术学院 | A kind of remote meter reading acquisition device and its power supply system based on NB-IoT |
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Application publication date: 20180327 |