CN104600808B - A kind of lithium battery charging device and its method - Google Patents
A kind of lithium battery charging device and its method Download PDFInfo
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- CN104600808B CN104600808B CN201510061764.6A CN201510061764A CN104600808B CN 104600808 B CN104600808 B CN 104600808B CN 201510061764 A CN201510061764 A CN 201510061764A CN 104600808 B CN104600808 B CN 104600808B
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- voltage
- lithium battery
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- electric capacity
- charging
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 82
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 238000007600 charging Methods 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000005284 excitation Effects 0.000 claims abstract description 34
- 230000005611 electricity Effects 0.000 claims description 10
- 238000010280 constant potential charging Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 238000004422 calculation algorithm Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 230000010354 integration Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000013078 crystal Substances 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical group [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000005955 Ferric phosphate Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229940032958 ferric phosphate Drugs 0.000 description 1
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 1
- 229910000399 iron(III) phosphate Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
-
- H02J7/0003—
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
-
- 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
-
- 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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention relates to a kind of charging device of lithium battery and its method, its BOOST booster circuit and charge control system for including input circuit component, being connected with input circuit component, the battery pack and self-oscillation circuit of reversed excitation that are connected with BOOST booster circuits, the load circuit being connected with self-oscillation circuit of reversed excitation, wherein, the charge control system is connected with load circuit, and controls load circuit.Have the technical effect that, using BOOST booster circuits and charge control system, realize high-power charging and the constant-voltage charge both of which of charging device, the photovoltaic module charging for making voltage relatively low enters lithium battery, and the RCC quasi-resonance soft switch technologies of the output of Resonant tube circuit of reversed excitation and circuit of reversed excitation are used, realize that power switch softens, improve conversion efficiency and reduce electromagnetic interference, and circuit of reversed excitation can conveniently realize multigroup voltage output, the use range of lithium battery is expanded.
Description
Technical field
The present invention relates to a kind of charging method of battery, more particularly to a kind of charging of photovoltaic module to enter lithium battery
Charging device and its method.
Background technology
Energy-accumulating medium of the lithium battery as a new generation, have can rapid large-current charging and the advantages of high current overdischarge,
The charging input of current lithium battery is general all to be inputted using single channel USB power source, then can not obtain the place of input power
The application of lithium battery can not be then realized, and solar energy can obtained anywhere as extensive and universal new energy.Will too
Positive energy component input will greatly improve the utilization space of lithium battery as a kind of charging modes of lithium battery.Currently as battery
The control mode of group energy conversion system is typically realized using simulation control, and the accurate of efficiency can not be realized using simulation control
Control and protection, in general lead-acid battery can not consider the efficiency of its output using photovoltaic module input, but be used as lithium electricity
Pond has the ability of large current charge, then the requirement of photovoltaic module maximum wind power extract will seem extremely important.And for one
As battery output circuit can typically use BUCK circuit outputs, then BUCK circuits do not have an isolation features, and not side
Just realize multiple-channel output, and use in general circuit of reversed excitation, it is switched the shortcomings of being hard switching pattern.
The content of the invention
Too small for photovoltaic module electric current in the prior art, the phenomenon that can not be filled with lithium battery, the present invention develops one
Kind lithium battery charging device and its method.
In order to realize above-mentioned technical purpose, the technical solution adopted by the present invention is to provide with BOOST booster circuits
A kind of lithium battery charging device and its method, the charging device include input circuit component, are connected with input circuit component
BOOST booster circuits, the charge control system for controlling BOOST booster circuits, the battery pack being connected with BOOST booster circuits, with
The connected self-oscillation circuit of reversed excitation of battery pack, the load circuit being connected with self-oscillation circuit of reversed excitation, wherein, the charging control
System processed is connected with load circuit, and controls load circuit, and monitors load circuit（106）The situation of operation, realize load electricity
Road (106) excessively stream, short circuit, overvoltage protection.
The preferred embodiment of the invention is, wherein, load circuit is RCC circuit of reversed excitation.
The preferred embodiment of the invention is that the BOOST booster circuits raise input circuit component in charging process
The voltage of output, realize input circuit component to lithium cell charging.
The preferred embodiment of the invention is to control BOOST booster circuits to realize lithium electricity by the charge control system
The accurate control of pond charging device digitlization, passes through the electric current on the digital measuring input circuit component built in charge control system
ipvWith voltage Vpv, then calculate and judge, realize the on/off of charge control system control BOOST booster circuit main switches, pass through
Self-oscillation circuit of reversed excitation determines the voltage on output loading circuit, then feed back to self-oscillation circuit of reversed excitation primary control it is true
Determine the break-make of main switch, realize the accurate control to load circuit voltage requirements.
The preferred embodiment of the invention is, wherein, the input circuit component includes photovoltaic module and USB interface group
Part.
The preferred embodiment of the invention is, wherein, the photovoltaic module includes at least one, the BOOST boostings electricity
Road includes at least one, the photovoltaic module and BOOST booster circuit one-to-one relationships.
The preferred embodiment of the invention is, wherein, the battery pack is lithium iron phosphate storage battery group.
The preferred embodiment of the invention is, wherein, the self-oscillation circuit of reversed excitation includes and battery pack（103）Open
Dynamic resistance Rg, diode ZD1, by starting resistance Rg, diode ZD1Establish power switch pipe V2Switch drive voltage, power
Switching tube V2Conducting forms flyback transformer, coil L1Voltage and ancillary coil L2Voltage formed direct proportion voltage relationship, it is auxiliary
Index contour circle L2The voltage of output passes through the first electric capacity C1, second resistance R2Driving power switching tube V2, meanwhile, as ancillary coil L2It is defeated
Go out voltage and pass through forward diode VD3To the second electric capacity C2Charging, the second electric capacity C2Voltage reach transistor VT1Electric conduction
Press, then transistor VT1Conducting, power switch pipe V2Gate-drive drag down, power switch pipe V2Shut-off, as coil L3There is voltage
After output, the second electric capacity C2Start to discharge, the second electric capacity C2Voltage, which reduces, causes transistor VT1Disconnect；As the second electric capacity C2Pass through
Backward dioded VD3During electric discharge, 3rd resistor R3To the first electric capacity C1Charging, the first electric capacity C1Voltage is raised, and driving power is opened
Close pipe V2Conducting, passes through the second electric capacity C2The charging to go round and begin again, electric discharge formed vibration, reach to main switch V1Conducting,
Shut-off.
A kind of charging method of lithium battery, wherein, charging method comprises the following steps：
A), the quick charge stage, when the charge control system detects the terminal voltage U of lithium batteryout, according to UoutInspection
Measured value judges whether battery pack needs fast charge, when it is determined that lithium battery needs fast charge, then carries out power control to BOOST booster circuits
System, charge control system calculate the switching frequency of switching tube by detecting charging system parameter
With duty cycle of switching, and adjusting switch frequencyIn Po, realize input
Circuit unit（101）Peak power is input to lithium battery group；
B), constant voltage charging phase, the charge control system detect the terminal voltage U of lithium batteryout, according to UoutDetection
Value judges whether battery pack enters constant-voltage charge, and when it is determined that lithium battery needs to enter constant-voltage charge, BOOST booster circuits enter
Determine the Isobarically Control pattern of frequency, the switch fixed frequency 100KHz of main switch.Wherein, L is BOOST inductance sensibility reciprocal, P0For BOOST
Power output, UpvTo input the voltage of photovoltaic module.
The preferred embodiment of the invention is, when the BOOST booster circuits in the quick charge stage are in maximum work
During rate operational mode, have：The excitation voltage of inductance is, the degaussing voltage of inductance is；
BOOST booster circuits work in electric current critical continuous conduction mode, then are had according to the voltage-second balance relation of inductance,
；（1）
It is derived by duty cycle of switching,
;（2）
；（3）
Wherein d is the conducting dutycycle of BOOST booster circuit master switches, and Ts is switch periods,To input photovoltaic
The voltage of component,For the charging voltage of lithium battery.
（2）, the storage energy E of inductance is in each switch periods：
（4）
The ENERGY E 2 that battery is output in each switch periods is：
（5）
According to the principle of the conservation of energy, there is E=E2.
（6）
According to Faraday's law, the voltage of BOOST inductance has：
（7）
Integration is taken to above formula both sides, can obtain inductive current has：
（8）
Will（8）Formula brings formula 6 into, then the switch periods for having BOOST booster circuits are：
（9）
The preferred embodiment of the invention is, wherein, can be according to numeral when the lithium battery enters the quick charge stage
The input photovoltaic component voltage of discretization detecting system, the terminal voltage of lithium battery, BOOST liters are calculated according to formula 3
Volt circuit control power switch pipe opens dutycycle, and the conducting week of BOOST booster circuit controlling switch pipes is calculated by formula 9
Phase, pass through the power for thering is control to export in the calculating formula of turn-on cycle, according toWithRealize the capture of peak power
Algorithm.
The preferred embodiment of the invention is, wherein, when the lithium battery is in constant voltage charging phase, BOOST boostings
Circuit uses fixed frequency modes, then has：
It is 100KHz to take fixed frequency, i.e. switch periods are：
The input voltage and the control planning of output voltage that the calculation formula of its dutycycle then arrives according to Digital Detecting, specifically
For：
。
The solution have the advantages that charging device front end uses BOOST booster circuits, pass through the inspection of charge control system
Survey and judge the charging stage for distinguishing lithium battery, Power Control is used in the large current charge stage, and in low current charge
The constant voltage charging stage use constant switching frequency Isobarically Control pattern, by the power voltage characteristic and lithium battery of photovoltaic module
Functional requirement perfect adaptation get up, and the rear end of ferric phosphate lithium cell charging device using Resonant tube circuit of reversed excitation export,
Resonant tube circuit of reversed excitation has that circuit is simple, the RCC quasi-resonance soft switch technologies of circuit of reversed excitation, and the soft of power switch can be achieved
Change, improve conversion efficiency, reduce the electromagnetic interference of system, and circuit of reversed excitation can conveniently realize multigroup voltage output, expand
The big use range of lithium battery.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the lithium battery energy conversion system with photovoltaic module input.
Fig. 2 is BOOST booster circuit control flow schematic diagrames.
Fig. 3 is the P-V curve synoptic diagrams of photovoltaic module.
Fig. 4 is self-oscillation circuit of reversed excitation schematic diagram.
Embodiment
For clearer narration technical scheme, the present invention is described further below in conjunction with the accompanying drawings.
Embodiment one
As shown in figure 1, lithium battery charging device includes input circuit component 101, is connected with input circuit component 101
The charge control system 105 of BOOST booster circuits 102, control BOOST booster circuits 102, is connected with BOOST booster circuits 102
Battery pack 103, the self-oscillation circuit of reversed excitation 104 being connected with battery pack 103, be connected with self-oscillation circuit of reversed excitation 104
Load circuit 106, wherein, the charge control system 105 is connected with load circuit 106, and controls load circuit 106, wherein,
Load circuit 106 is RCC circuit of reversed excitation.
Wherein, at least one BOOST booster circuits 102 are arranged on the front end of lithium battery charging device, lithium cell charging dress
The rear end put is provided with least one RCC circuit of reversed excitation.
Input circuit component 101 includes at least one photovoltaic module, and a USB interface component.Wherein, photovoltaic module
With BOOST booster circuit one-to-one relationships.
The preferred embodiment of the invention is, wherein, the battery pack 103 is lithium iron phosphate storage battery group.
When input circuit component 101 is photovoltaic module, the major loop front end of lithium battery charging device is boosted using BOOST
Circuit 102, photovoltaic energy are input to lithium battery 103 by BOOST booster circuits, and the energy in lithium battery is anti-by self-oscillation
Excitation circuit 104 is output in load circuit 106.Charge control system 105 is by detecting the voltage U of photovoltaic modulepv, photovoltaic module
Electric current ipvWith the voltage U of lithium battery group 103out, judge the working condition of BOOST booster circuits for work(by detection parameters
Rate output mode or constant pressure output mode, the control signal of output is calculated according to the working condition of BOOST booster circuits
PWM1 drive control main switches V1, by the electric current i for detecting loado, judge the load state of lithium battery charging device, lithium electricity
Pond charging device overload is then by PWM2 come controlling switch pipe V3。
As shown in Fig. 2 charge control system 105 detects the terminal voltage U of lithium batteryout, according to terminal voltage UoutDetected value
Determine the need for fast chargeIf being in fast charge demand, then Power Control, charge control are carried out to BOOST booster circuits 102
System 105 calculates the switching frequency of switching tube by the systematic parameter of detectionWith switch duty
Than, in the Power Control stage, adjusting switch frequencyIn Po, so as to real
Show photovoltaic module maximum power output to lithium battery.When lithium battery, which detects, needs constant-voltage charge, lithium battery is in low current
Charging stage, BOOST booster circuits 102, which enter, determines frequency Isobarically Control pattern, and the switch of main switch uses fixed frequency
100KHz, reach Isobarically Control requirement.
Shown in Fig. 3, the power vs. voltage curve of photovoltaic module output, abscissa is the voltage of photovoltaic module, and ordinate is light
Lie prostrate the power of component.BOOST booster circuits 102 control photovoltaic module to be climb since right side slope, and lithium battery is in high current
Charge requirement, then the output of photovoltaic module will operate in the peak power area of power vs. voltage curve, if lithium battery is in perseverance
Press low current charge demand, then system more will may operate at left side or right side according to voltage requirements photovoltaic module.
As shown in figure 4, self-resonance circuit of reversed excitation includes the grounding resistance R with battery pack 103g, diode ZD1, pass through ground connection
Resistance Rg, diode ZD1Establish power switch pipe V2Switch drive voltage, power switch pipe V2Conducting forms flyback transformer,
Coil L1Voltage and ancillary coil L2Formation ratio coil positive voltage is established, ancillary coil L2The voltage of output passes through the first electricity
Hold C1, second resistance R2Driving power switching tube V2, meanwhile, ancillary coil L2Output voltage passes through forward diode VD3To second
Electric capacity C2Charging, the second electric capacity C2Voltage reach transistor VT1Conducting voltage, then transistor VT1Conducting, power switch pipe V2
Gate-drive drag down, power switch pipe V2Shut-off, as coil L3After having voltage output, the second electric capacity C2Start to discharge, the second electricity
Hold C2Voltage, which reduces, causes transistor VT1Disconnect, the second electric capacity C2Pass through backward dioded VD during electric discharge3, 3rd resistor R3To
One electric capacity C1Charging, the first electric capacity C1Voltage raises, and driving power switching tube V2Conducting, passes through the second electric capacity C2Zhou Erfu
The charging of beginning, electric discharge form vibration, reached to main switch V1Conducting, shut-off, realize the defeated of self-oscillation circuit of reversed excitation
Go out.
In the charging process of lithium battery, it comprises the following steps：
A), the quick charge stage, when the charge control system 105 detects the terminal voltage U of lithium batteryout, according to Uout
Detected value judge whether battery pack 103 needs fast charge, when it is determined that lithium battery needs fast charge, then to BOOST booster circuits 102
Power Control is carried out, charge control system 105 calculates the switching frequency of switching tube by detecting charging system parameterWith duty cycle of switching, and adjusting switch frequency
In Po, realize that the peak power of input circuit component 101 is input to lithium battery group 103；
B), constant voltage charging phase, the charge control system 105 detect the terminal voltage U of lithium batteryout, according to Uout's
Detected value judges whether battery pack 103 enters constant-voltage charge, when it is determined that lithium battery needs to enter constant-voltage charge, BOOST boostings
Circuit 102 enters the Isobarically Control pattern for determining frequency, the switch fixed frequency 100KHz of main switch.Wherein, L is BOOST inductance senses
Amount, P0For BOOST power outputs, UpvTo input the voltage of photovoltaic module.
When the BOOST booster circuits 102 in the quick charge stage are in peak power operational mode, have：Inductance
Excitation voltage be, the degaussing voltage of inductance is；
BOOST booster circuits 102 work in electric current critical continuous conduction mode, then are had according to the voltage-second balance relation of inductance,
；（1）
It is derived by duty cycle of switching,
;（2）
；（3）
Wherein d is the conducting dutycycle of the master switch of BOOST booster circuits 102, and Ts is switch periods,For input light
The voltage of component 101 is lied prostrate,For the charging voltage of lithium battery.
（2）, the storage energy E1 of inductance is in each switch periods：
（4）
The ENERGY E 2 that battery is output in each switch periods is：
（5）
According to the principle of the conservation of energy, there is E1=E2.
（6）
According to Faraday's law, the voltage of BOOST inductance has：
（7）
Integration is taken to above formula both sides, can obtain inductive current has：
（8）
Will（8）Formula brings formula 6 into, then the switch periods for having BOOST booster circuits are：
（9）.
, can be according to the input photovoltaic module 101 of Digital Discrete detecting system when lithium battery enters the quick charge stage
Voltage, the terminal voltage of lithium battery, BOOST booster circuits opening for power switch pipe of control is calculated according to formula 3 and accounted for
Empty ratio, the turn-on cycle of the controlling switch pipe of BOOST booster circuits 102 is calculated by formula 9, pass through the calculating formula of turn-on cycle
In have control export power P o, according to Po withRealize the acquisition algorithm of peak power.
When lithium battery is in constant voltage charging phase, BOOST booster circuits use fixed frequency modes, then have：
It is 100KHz to take fixed frequency, i.e. switch periods are：
The input voltage and the control planning of output voltage that the calculation formula of its dutycycle then arrives according to Digital Detecting, specifically
For：
。
In charging process, BOOST booster circuits 102 by raise input circuit component 101 export voltage, realize
Input circuit component 101 is to lithium cell charging.BOOST booster circuits 102 are controlled to realize lithium battery by charge control system 105
The accurate control of charging device digitlization, by the digital measuring input circuit component 101 built in charge control system 105
Electric current ipvWith voltage Vpv, then calculate and judge, realize charge control system 105 control BOOST booster circuit main switches it is logical/
It is disconnected, the voltage on output loading circuit 106 is determined by Resonant tube circuit of reversed excitation 104, then feed back to self-oscillation flyback electricity
The primary control on road 104 determines the break-make of main switch, realizes the accurate control to the voltage requirements of load circuit 106.
Embodiment described above only expresses embodiments of the present invention, and its description is more detailed, as long as the skill of this area
Art personnel are after embodiments of the invention are viewed, and on the premise of not departing from present inventive concept, the change made belongs to this hair
Bright protection domain.But embodiment as described herein is it is not intended that limit protection scope of the present invention.
Claims (11)
1. a kind of lithium battery charging device, it is characterised in that the lithium battery charging device includes input circuit component（101）、
With input circuit component（101）Connected BOOST booster circuits（102）, with BOOST booster circuits（102）The battery pack of connection
（103）, with battery pack（103）Connected self-oscillation circuit of reversed excitation（104）, with self-oscillation circuit of reversed excitation（104）Connected
Load circuit（106）, wherein, charge control system（105）With BOOST booster circuits（102）And load circuit（106）It is connected,
And monitor load circuit（106）Operation conditions, load circuit (106) excessively stream is realized, short circuit, overvoltage protection, the self-oscillation
Circuit of reversed excitation（104）Including with battery pack（103）Connected grounding resistance Rg, diode ZD1, pass through grounding resistance Rg, two poles
Pipe ZD1 establishes power switch pipe V2 switch drive voltage, and power switch pipe V2 turns on to form flyback transformer, coil L1 electricity
Pressure and ancillary coil L2 voltage form direct proportion voltage relationship, and the voltage of ancillary coil L2 outputs is by the first electric capacity C1, and the
Two resistance R2 driving power switching tube V2, meanwhile, ancillary coil L2 output voltages are by forward diode VD3 to the second electric capacity C2
Charging, the second electric capacity C2 voltage reach transistor VT1 conducting voltage, then transistor VT1 is turned on, power switch pipe V2 door
Pole driving drags down, and power switch pipe V2 shut-offs, after coil L3 has voltage output, the second electric capacity C2 starts to discharge, the second electric capacity
C2 voltages, which reduce, causes transistor VT1 to disconnect, and by backward dioded VD3 when the second electric capacity C2 discharges, 3rd resistor R3 is to the
One electric capacity C1 is charged, the rise of the first electric capacity C1 voltages, and driving power switching tube V2 is turned on, and passes through the second electric capacity C2 Zhou Erfu
The charging of beginning, electric discharge form vibration, reach the conducting to power switch pipe V2, turn off.
2. lithium battery charging device according to claim 1, it is characterised in that the BOOST booster circuits（102）Filling
Input circuit component is raised in electric process（101）The voltage of output, realize input circuit component（101）To lithium cell charging.
3. lithium battery charging device according to claim 1, it is characterised in that pass through the charge control system（105）
Control BOOST booster circuits（102）The accurate control of lithium battery charging device digitlization is realized, passes through charge control system（105）
Built-in digital measuring input circuit component（101）On electric current ipvWith voltage Vpv, then calculate and judge, realize charging control
System processed（105）The on/off of BOOST booster circuit main switches is controlled, passes through self-oscillation circuit of reversed excitation（104）It is determined that output is negative
Carry circuit（106）On voltage, then feed back to self-oscillation circuit of reversed excitation（104）Primary control determine the break-make of main switch,
Realize to load circuit（106）The accurate control of voltage requirements.
4. lithium battery charging device according to claim 1, it is characterised in that the load circuit（106）For RCC flybacks
Circuit.
5. lithium battery charging device according to claim 1, it is characterised in that the input circuit component（101）Including
Photovoltaic module and USB interface component.
6. lithium battery charging device according to claim 5, it is characterised in that the photovoltaic module include it is at least one,
The BOOST booster circuits（102）Include at least one, the photovoltaic module and BOOST booster circuits（102）Correspond and close
System.
7. lithium battery charging device according to claim 1, it is characterised in that the self-oscillation circuit of reversed excitation（104）
Including with battery pack（103）The startup resistance R of connection1, diode ZD1, by starting resistance R1, diode ZD1Power is established to open
Close pipe V2Switch drive voltage, power switch pipe V2Conducting forms flyback transformer, coil L1Voltage and ancillary coil L2's
Voltage forms direct proportion voltage relationship, ancillary coil L2The voltage of output passes through the first electric capacity C1, second resistance R2Driving power is opened
Close pipe V2, meanwhile, as ancillary coil L2Output voltage passes through forward diode VD3To the second electric capacity C2Charging, the second electric capacity C2's
Voltage reaches transistor VT1Conducting voltage, then transistor VT1Conducting, power switch pipe V2Gate-drive drag down, power is opened
Close pipe V2Shut-off, as coil L3After having voltage output, the second electric capacity C2Start to discharge, the second electric capacity C2Voltage, which reduces, causes crystal
Pipe VT1Disconnect；As the second electric capacity C2Pass through backward dioded VD3During electric discharge, 3rd resistor R3To the first electric capacity C1Charging, the first electricity
Hold C1Voltage raises, and driving power switching tube V2Conducting, passes through the second electric capacity C2The charging to go round and begin again, electric discharge formation shake
Swing, reach to main switch V1Conducting, shut-off.
8. one kind includes the charging method of any lithium battery charging device in claim 1 ~ 7, it is characterised in that the side
Method comprises the following steps：
A) in, the quick charge stage, charge control system is worked as（105）Detect the terminal voltage U of lithium batteryout, according to UoutDetection
Value judges battery pack（103）Whether fast charge is needed, when it is determined that lithium battery needs fast charge, then to BOOST booster circuits（102）Enter
Row Power Control, charge control system（105）The switching frequency of switching tube is calculated by detecting charging system parameterWith duty cycle of switching, and adjusting switch frequency
In Po, realize input circuit component（101）Peak power is input to lithium battery group（103）；
B), constant voltage charging phase, the charge control system（105）Detect the terminal voltage U of lithium batteryout, according to UoutInspection
Measured value judges battery pack（103）Whether constant-voltage charge is entered, when it is determined that lithium battery needs to enter constant-voltage charge, BOOST boostings
Circuit（102）The Isobarically Control pattern of frequency is determined in incision, wherein, BOOST booster circuits（102）The switch fixed frequency of middle main switch
For 100KHz；
Wherein, L is BOOST inductance sensibility reciprocals, and Po is BOOST power outputs, and Upv is the voltage of input photovoltaic module.
9. the charging method of lithium battery according to claim 8, it is characterised in that when in the quick charge stage
When BOOST booster circuits are in peak power operational mode, have：The excitation voltage of inductance is, inductance removes magnetoelectricity
Press and be；
BOOST booster circuits work in electric current critical continuous conduction mode, then are had according to the voltage-second balance relation of inductance,
, wherein, T is the system switching cycle（1）
It is derived by duty cycle of switching,
;（2）
；（3）
Wherein d is the conducting dutycycle of BOOST booster circuit main switches, and Ts is switch periods,For input photovoltaic module
Voltage,For the charging voltage of lithium battery,
（2）, the storage energy E of inductance is in each switch periods：
（4）
The ENERGY E 2 that battery is output in each switch periods is：
（5）
According to the principle of the conservation of energy, there is E=E2,
（6）
According to Faraday's law, the voltage of BOOST inductance has：
（7）
Integration is taken to above formula both sides, can obtain inductive current has：
（8）
Will（8）Formula brings formula 6 into, then the switch periods for having BOOST booster circuits are：
（9）.
10. the charging method of lithium battery according to claim 8, it is characterised in that：When the lithium battery enters quick charge
, can be according to the input photovoltaic component voltage of Digital Discrete detecting system during the stage, the terminal voltage of lithium battery, root
BOOST booster circuits control power switch pipe is calculated according to formula (3) and opens dutycycle, and BOOST boostings are calculated by formula (9)
The turn-on cycle of circuit controling switch pipe, pass through the power for thering is control to export in the calculating formula of turn-on cycle, according toWithRealize the acquisition algorithm of peak power.
11. the charging method of lithium battery according to claim 8, it is characterised in that：When the lithium battery fills in constant pressure
During the electric stage, BOOST booster circuits use fixed frequency modes, then have：
It is 100KHz to take fixed frequency, i.e. switch periods are：
, wherein, fs is system switching frequency,
The input voltage and the control planning of output voltage that the calculation formula of its dutycycle then arrives according to Digital Detecting, it is specially：
。
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Effective date of registration: 20240403 Address after: Room 112, 1st Floor, Building 6, No. 688 Chenjing Road, Sijing Town, Songjiang District, Shanghai, 201600 Patentee after: Ampereva Technology (Shanghai) Co.,Ltd. Country or region after: China Address before: Room 203, No. 21, Sizhi Lane, No. 888 Luojin Road, Minhang District, Shanghai, 2011 Patentee before: Cao Chunrong Country or region before: China |