CN107579582A - A kind of solar charging method for electrically, control device and system - Google Patents
A kind of solar charging method for electrically, control device and system Download PDFInfo
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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
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Abstract
The invention discloses a kind of solar charging method for electrically, control device and system, comprise the following steps：Step A）It is periodically detected current solar panels output voltage values and current value, battery charging voltage value and current value；Step B）Select different charge modes：Enter constant-voltage charge pattern if present battery charging current value is less than the lower limit of user's setting；Enter constant current charging mode if present battery charging current value is more than the higher limit of user's setting；Step C）If between charging current lower limit and higher limit that present battery charging current value is set between user, different charge modes is selected：Enter MPPT charge modes if present battery charging voltage value is less than the charging voltage limit value of user's setting；Enter constant-voltage charge pattern if present battery charging voltage is more than or equal to the charging voltage limit value of user's setting.The present invention can effectively lift charge efficiency and service lifetime of accumulator.
Description
Technical field
The present invention relates to solar charging power technology, is applied to industrial control field more particularly, to one kind and is led with civilian business
Solar charging method for electrically, control device and the system in domain.
Background technology
Solar photovoltaic generation system, it is the photovoltaic effect using solar cell, solar energy radiation energy is directly turned
Change a kind of electricity generation system of electric energy into, low noise pollution-free with its, safeguard that simple multiple features are widely applied.
System mainly includes several parts：Solar battery array, converter, load and load driver, controller.Control
The basic role of device processed be can prevent solar panel directly for battery charging and caused by solar panels voltage clamp exist
Cell voltage and caused charging is slow, efficiency is low, the problems such as battery is scrapped.
Conventional solar charging electric control method in the market mainly has three kinds：Break-make type, PWM types（Impulse modulation）With
And MPPT types（MPPT maximum power point tracking）.Part controller for solar on the market uses the side that break-make type is combined with PWM
Formula is charged, and in the case of accumulator capacity deficiency, is given battery constant-current charge for a long time using break-make pattern, is worked as electric power storage
In the case of tankage is more sufficient, charged using PWM mode.But because discharge current phenomenon be present, to battery charge efficiency
Do not improve, and discharge current is bigger, it is more unfavorable to the life of storage battery.
The content of the invention
In view of this, it is an object of the invention to provide a kind of solar charging method for electrically, control device and system, can solve
Certainly existing charging method battery synthesis charge efficiency is undesirable, the charging modes technical problem larger to battery side effect.
In order to realize foregoing invention purpose, the present invention specifically provides a kind of technical scheme of solar charging method for electrically.One
Kind solar charging method for electrically, comprises the following steps：
Step A）It is periodically detected current solar panels output voltage values, solar panels output current value, battery charging voltage value
With battery charge current value；
Step B）According to present battery charging current value, contrasted by the charging current limitation value set with user, so as to
Select different charge modes：Enter constant-voltage charge mould if present battery charging current value is less than the lower limit of user's setting
Formula；Enter constant current charging mode if present battery charging current value is more than the higher limit of user's setting；
Step C）If between charging current lower limit and higher limit that present battery charging current value is set between user, basis
Present battery charging voltage value, contrasted by the charging voltage limit value set with user, so as to select different chargings
Pattern：Enter MPPT charge modes if present battery charging voltage value is less than the charging voltage limit value of user's setting；If work as
Preceding battery charging voltage is more than or equal to the charging voltage limit value that user is set and then enters constant-voltage charge pattern.
As a kind of further improvement of solar recharging method and technology scheme of the present invention, the step C）In, according to inspection
Measured value calculates current solar panels output power value and power output average value, and is stored in register, by current power value with depositing
Storage power average value is compared, and by adjusting step-length, influences PWM pulsewidths to adjust power output：
If current power value is equal with storage power average value, do not adjust；If output power value and power output average value
It is unequal, then step-length is adjusted in either direction, if difference reduces, continues to adjust step-length towards the direction, until the two is equal；
If difference increases, step-length is adjusted in the opposite direction, until the two is equal；Calculated according to below equation：
Solar panels power output=solar panels magnitude of voltage * solar panels current values,
Power output average value=（Upper cycle power output+this power output）/2.
As a kind of further improvement of solar recharging method and technology scheme of the present invention, methods described also includes following step
Suddenly：
Step D）Detect current charge mode and write register, by judging to control load output：When cell voltage is less than
Load voltage limit value, close load output；When cell voltage is more than load voltage limit value, unlatching load output.
As a kind of further improvement of solar recharging method and technology scheme of the present invention, under MPPT patterns, if currently
Cell voltage is less than solar panel 2V, then reduces PWM pulsewidths, solar panels is rapidly achieved MPPT voltages.
As a kind of further improvement of solar recharging method and technology scheme of the present invention, the step B）In, constant pressure is filled
Calculated under power mode according to below equation：
Regulation step-length=（This voltage error value）* P coefficients+（This voltage error value-last time voltage error value）* I coefficients,
Error amount=setting magnitude of voltage-actual voltage value,
Wherein, P coefficients are the proportionality coefficient that PI is controlled under constant-voltage charge pattern, and I coefficients are that PI is controlled under constant-voltage charge pattern
Integral coefficient.
As a kind of further improvement of solar recharging method and technology scheme of the present invention, the step C）In, constant current is filled
Power mode calculates according to below equation：
Regulation step-length=（This current error value）* P coefficients+（This current error value-last time current error value）* I coefficients,
Error amount=setting current value-actual current value,
Wherein, P coefficients are the proportionality coefficient that PI is controlled under constant current charging mode, and I coefficients are that PI is controlled under constant current charging mode
Integral coefficient.
As a kind of further improvement of solar recharging method and technology scheme of the present invention, methods described is also included periodically
Detection Current Temperatures are simultaneously stored in register, judge current controller temperature, temperature is less than 30 DEG C of closing fans；Temperature is more than 45 DEG C
Then fan full speed running；Temperature is between 30 DEG C to 45 DEG C, then the rotating speed of fan calculates according to below equation：
Rotating speed percentage=20%+（（Current temperature value -30）*10 ）*20% .
The present invention also specifically provides a kind of technical scheme of solar charging controller for electric consumption, a kind of solar recharging in addition
Control device, including：Detection unit, computing unit, charge mode selecting unit, control unit and load drive unit；
The input of the detection unit is solar panels and magnitude of voltage, the current value of battery, and result is exported to computing unit；
Storage value of the computing unit in input voltage value, current value and register is calculated, and by structure output
To charge mode selecting unit；
The charge mode selecting unit selects different charge modes according to the result of calculation of input；If present battery charges
Current value is less than the limit value lower limit that user is set and then enters constant-voltage charge pattern；If present battery charging current value is more than user
The limit value upper limit of setting then enters constant current charging mode；If the limit value that present battery charging current value is set between user
Between lower limit and the upper limit, then according to present battery charging voltage value, by being contrasted with charging voltage setting value, selection is different
Charge mode：Enter MPPT charge modes if present battery charging voltage is less than the charging voltage limit value of user's setting；
Enter constant-voltage charge pattern if present battery charging voltage is more than or equal to the charging voltage limit value of user's setting；To be charged mould
Formula signal output is to control unit；
Described control unit, by controlling load drive unit, realizes driving load work according to the charge mode signal of input
Make.
The present invention also specifically provides a kind of technic relization scheme of solar recharging system, a kind of solar recharging system
System, including solar panel, the BUCK converters being connected with the solar energy energy cell panel, for realize maximum power point with
Track；The controller being connected with the BUCK converters, the BUCK converters are controlled to carry out connected battery for realizing
Charging；Load driver is connected with the battery, controller, BUCK converters and load respectively, in the controller
In the presence of be load supplying；485 interfaces are connected with the controller, for realizing the signal between controller and 485 equipment
Communication.
As a kind of further improvement of solar recharging system of the present invention, described solar recharging system, in addition to
Blue tooth interface, it is attached for realizing with mobile electronic device, facilitates Field Force's debugging maintenance.
The technical scheme of a kind of solar charging method for electrically, control device and the system that are provided by implementing the invention described above,
Have the following technical effect that：
（1）Charging method principle of the present invention is directly perceived, it can be readily appreciated that algorithm is simple, it is easy to accomplish engineer applied；
（2）The present invention can effectively lift charge efficiency and service lifetime of accumulator.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The section Example of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is MPPT operation principle schematic diagrams.
Fig. 2 is the operating diagram of solar charging method for electrically of the present invention.
Fig. 3 is the system construction drawing of battery charge controller of the present invention.In figure：101- detection units, 102- computing units,
103- charge mode selecting units, 104- control units, 105- load drive units.
Fig. 4 is solar recharging system of the present invention.In figure：1- solar panels, 2-BUCK converters, 3- controllers,
4-485 interfaces, 5- batteries, 6- load drive units, 7- loads.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only
Only it is the part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the common skill in this area
The every other embodiment that art personnel are obtained under the premise of creative work is not made, belong to the model that the present invention protects
Enclose.
As shown in accompanying drawing 1 to accompanying drawing 4, a kind of solar charging method for electrically of the present invention, control device and system are given
Specific embodiment, the invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
First, after system electrification, each function mouth can be first initialized, such as communicate, bluetooth module.PWM generator, voltage
Analog quantity, current-mode analog quantity, and the maximum charging voltage limitation stored before is read, maximum charging current limitation, load defeated
Go out value reading etc..Preferably, current setting value lower limit is 20mA；
Secondly, filled as shown in Fig. 2 being periodically detected current solar panels output voltage values, solar panels output current value, battery
Piezoelectric voltage value and battery charge current value, detection cycle are 250 times per second.
The present battery charging current value obtained according to detection, filled by what is set with the user prestored in register
Electric current limit value is contrasted, so as to select different charge modes：If present battery charging current value is set less than user
Lower limit then enter constant-voltage charge pattern, then according to below equation（1、2）Calculate regulation step-length；
Regulation step-length=（This voltage error value）* P coefficients+（This voltage error value-last time voltage error value）* I coefficients（It is public
Formula 1）
Error amount=setting magnitude of voltage-actual voltage value（Formula 2）
Wherein, P coefficients are the proportionality coefficient that PI is controlled under constant-voltage charge pattern, and I coefficients are that PI is controlled under constant-voltage charge pattern
Integral coefficient.
In above formula, two parameters of PI will consider, and two parameters will debug repeatedly, be finally reached preferable knot
Fruit.If the method that can have theory when PI parameters are adjusted determines PI parameters certainly optimal method, but
It is more to determine PI parameter by gathering examination method in actual application.
Scaling up FACTOR P will typically accelerate the response of system, be advantageous to reduce static difference in the case where there is static difference, still
Excessive proportionality coefficient can make system have bigger overshoot, and produce vibration, stability is degenerated.
Increase time of integration I is advantageous to reduce overshoot, reduces vibration, makes the stability of system increase, but system static difference
It is elongated to eliminate the time.
Then the proportionality coefficient regulated is slightly reduced into (be typically reduced into initial value 0.8), then reduces integration
Time so that in the case where keeping good dynamic characteristics, static difference is eliminated system.In the process, can be according to system
The quality of response curve changes proportionality coefficient and the time of integration repeatedly, is desirably to obtain satisfied control process and setting parameter.
When gathering examination, refer to effect tendency of the above parameter to system control process, parameter adjustment is carried out first ratio,
After integrate, then differential adjusts step.
Proportional parts is adjusted first.Scale parameter is changed from small to big, and observes corresponding system response, until being reacted
It hurry up, the response curve that overshoot is small.If system does not have static difference or static difference small into allowed band, and to response curve
Through satisfaction, then proportional controller is only needed.
If the static difference of system can not meet design requirement on the basis of proportion adjustment, integral element must be added to.
The time of integration is first set to a bigger value when adjusting.
Enter constant current charging mode if present battery charging current value is more than the higher limit of user's setting, according to following public affairs
Formula（3、4）Calculate regulation step-length；
Regulation step-length=（This current error value）* P coefficients+（This current error value-last time current error value）* I coefficients
（Formula 3）
Error amount=setting current value-actual current value（Formula 4）
Wherein, P coefficients are the proportionality coefficient that PI is controlled under constant current charging mode, and I coefficients are that PI is controlled under constant current charging mode
Integral coefficient（PI regulative modes are as previously described）.
Step C）If between charging current lower limit and higher limit that present battery charging current value is set between user,
According to present battery charging voltage value, contrasted by the charging voltage limit value set with user, it is different so as to select
Charge mode：Enter constant-voltage charge mould if present battery charging voltage is more than or equal to the charging voltage limit value of user's setting
Formula；Enter MPPT charge modes if present battery charging voltage value is less than the charging voltage limit value of user's setting.
MPPT control general principles are in the case of it is assumed that the junction temperature of battery is constant, pass through the characteristic curve of photovoltaic device
Know, only when load reaches impedance matching with photovoltaic device, photovoltaic device just understands Maximum Power Output, now claims photovoltaic device
Part is operated in maximum power point, in order to give full play to the efficiency of photovoltaic device, need to constantly be adjusted according to external environment condition and loading condition
The operating point of section photovoltaic device makes its Maximum Power Output, and this power adjusting is referred to as into MPPT maximum power point tracking（MPPT）.
Curve I in Fig. 1, v correspond to the V characteristic curves of I mono- of photovoltaic device in the case of different sunshines, A, B difference respectively
For the maximum output power point of photovoltaic device in the case of different sunshines, load 1, load 2 is two load curves.When photovoltaic device
When part is operated in A points, sunshine is strengthened suddenly, and because load does not change, the operating point of photovoltaic device is transferred to A ' points.From figure
In as can be seen that in order that photovoltaic device remains to Maximum Power Output it is necessary to make photovoltaic device be operated in spy in characteristic curve 1
B points on linearity curve 1, that is to say, that must be controlled to the external circuit of photovoltaic device makes its load characteristic be changed into loading
Curve 2 realizes the power match with photovoltaic device, so that photovoltaic device Maximum Power Output.
Output in each controlling cycle with less step-size change solar battery array, the step-length of change is certain
, direction can be that increase can also be reduced, and control object can be the output voltage or electric current of solar battery array, this
One process referred to as " disturbs " then, by comparing the power output of solar battery array before and after interference period, if output work
Rate increase, then continue to continue " interference " process according to the direction in a upper cycle, if detecting that power output is reduced, change
The direction of " interference ".
If currency is more than average value, continue to adjust a step-length towards this direction（One step-length is about whole pulsewidth
0.1%）；If less than average value, then towards one step-length of tune of this opposite direction.If equal to average value, that is, be in
MPPT maximum points, are not adjusted.
Abovementioned steps C）In, current solar panels output power value and power output average value are calculated according to detected value, and
Register is stored in, by current power value compared with storage power average value, by adjusting step-length, influences PWM pulsewidths to adjust
Save power output：
If current power value is equal with storage power average value, do not adjust；If output power value and power output average value
It is unequal, then step-length is adjusted in either direction, if difference reduces, continues to adjust step-length towards the direction, until the two is equal；
If difference increases, step-length is adjusted in the opposite direction, until the two is equal；According to below equation（5、6）Calculate：
Present output power=solar panels voltage * solar panels electric currents（Formula 5）
Power output average value=（Last power output+this power output）/2 （Formula 6）
In above-mentioned steps D）In, detect current charge mode and write register, by judging to control load output：Work as battery
Voltage is less than load voltage limit value, closes load output；When cell voltage is more than load voltage limit value, unlatching load is defeated
Go out, to play a part of protecting battery.
After uniform charging, after battery is allowed to stand for a period of time, its terminal voltage meeting nature falls, and now just enters
Enter floating charge state.Using PWM mode, reduce battery charging current by adjusting pulse width.If present battery is electric
Pressure is less than solar cell panel voltages 2V, then reduces PWM pulsewidths, solar panels is rapidly achieved MPPT voltages.By rising step by step
High voltage, in case battery temperature persistently raises.This is very good for battery, because internal temperature of battery is to charge and discharge
The influence of electricity is very big.
A temperature sensors of high precision built in this controller, detects controller interior environment temperature, and detection frequency is 1
It is secondary/hundred seconds, and temperature value is stored in register.The additionally axial flow blower of a built-in radiating, blower fan can be according in controller
The environment temperature in portion adjusts rotating speed in time, extends fan life.Temperature is less than 30 DEG C or charging current is less than 2A and dissipates closing
Air-heater, to reduce energy loss.
When temperature is more than 45 DEG C of then driving fan full speed runnings；When temperature is between 30 DEG C to 45 DEG C, then passes through to calculate and turn
Fast percentage controls the rotating speed of fan, according to below equation（7）Calculate：
Rotating speed percentage=20%+（（Current temperature value -30）*10 ）*20% （Formula 7）
As shown in figure 3, the solar charging controller for electric consumption of specific embodiment of the invention description, by detection unit 101, calculates list
Member 102, charge mode selecting unit 103, control unit 104 and load drive unit 105 are formed；
The solar panels output voltage values and current value that detection unit 101 detects by cycle sensor, and battery
Magnitude of voltage and current value, and result is exported to computing unit 102 in a manner of data signal；
Magnitude of voltage that computing unit 102 inputs according to detection unit 101, current value are counted with the storage value in register respectively
Calculate, and by structure output to charge mode selecting unit 103；
Charge mode selecting unit 103 selects different charge modes by logic judgment according to the result of calculation of input；If work as
Preceding cell voltage then enters MPPT charge modes less than or equal to charging voltage setting value；If current battery level is more than charging voltage
Setting value then enters constant-voltage charge pattern；When present battery charging current value is between setting value lower limit and the upper limit, if working as
Preceding cell voltage then enters MPPT charge modes less than or equal to charging voltage setting value；If current battery level is more than charging voltage
Setting value then enters constant-voltage charge pattern；By charge mode signal output to control unit 104；
Control unit 104, by controlling load drive unit 105, realizes driving load work according to the charge mode signal of input
Make.
This battery charge controller can adaptively be less than 100V voltages, and less than the solar panels of 10A electric currents, input voltage is higher than
16V can give the battery less than input voltage to charge.In order to ensure to have constant charge efficiency, opened a way when matching solar panels
Apolegamy is higher than cell voltage more than 80%.Especially in rainy weather, maximum output power point between open-circuit voltage 50-60%,
Therefore polylith solar panels are connected in selection during now high-power charging.
As shown in figure 4, the solar recharging system of specific embodiment of the invention description, solar panel 1 is by luminous energy
Electric energy is converted into, the BUCK converters 2 being connected with solar energy energy cell panel 1, for realizing MPPT maximum power point tracking；
The controller 3 being connected with BUCK converters 2, for realizing that control BUCK converters 2 fill to connected battery 5
Electricity；This controller uses High Performance SCM as main control chip, and performance is high, stable, becomes flexible, and debugging is convenient.Input
Voltage range is wide（Direct current 10-100V）, can built-in RC crystal oscillators band phaselocked loop control accuracy, be anti-interference offer powerful guarantee.It is interior
Hardware watchdog is put, built-in storage chip is transferred by telegram, 485 tributary address can be stored（0-127）, setting for running parameter can be preserved
Fixed, uploading important parameter after power-off again will not lose.
485 interfaces 4 are connected with controller 3, for realizing the signal communication between outside 485 equipment.485 buses can be with
Multiple industrial equipments are intervened, can the progress data acquisition of carry multiple equipment and operation control by mdbus_rtu slave stations bus protocol
System, so as to realize large generating system application in parallel.
Controller is by controlling load drive device 6 to realize the opening and closing to load 7 according to setting, preferably
Protect battery.
This solar recharging system also has blue tooth interface, for the charge controller etc. at scene is carried out data acquisition and
Control, operating personnel can use wireless device to carry out on-site maintenance and operation, improve convenience.
Logical 6 cross the technical side of the solar charging method for electrically for implementing specific embodiment of the invention description, control device and system
Case, following technique effect can be produced：
（1）The present invention is using the MPPT algorithm than commonly sizing solar charging controller efficiency is higher by 30% or so on the market.
（2）Voltage, built-in temperature are closed in the settable charging voltage of the present invention, charging current, load cut-in voltage, load
Sensor, speed governing axial flow blower are to ensure that the stable of controller is runed.
（3）The present invention can carry out data acquisition and control by 485 buses, blue tooth interface to the charge controller at scene.
Flexible tributary address setting, is achieved and allows a bus to hang multiple charge controllers, so as to realize in large generating system
Parallel connection application.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
Furthermore, it is necessary to explanation, described above is only presently preferred embodiments of the present invention, and not the present invention is appointed
What formal limitation.Although the present invention is disclosed above with preferred embodiment, but is not limited to the present invention.It is any ripe
Those skilled in the art is known, in the case where not departing from the Spirit Essence of the present invention and technical scheme, is all taken off using above-mentioned
The methods and technical content shown makes many possible changes and modifications to technical solution of the present invention, or is revised as equivalent variations
Equivalent embodiment.Therefore, every content without departing from technical solution of the present invention, the technical spirit according to the present invention are implemented to more than
Any simple modification, equivalent substitution, equivalence changes and the modification that example is made, still fall within the scope of technical solution of the present invention protection
It is interior.
Claims (10)
1. a kind of solar charging method for electrically, it is characterised in that comprise the following steps：
Step A）It is periodically detected current solar panels output voltage values, solar panels output current value, battery charging voltage value
With battery charge current value；
Step B）According to present battery charging current value, contrasted by the charging current limitation value set with user, so as to
Select different charge modes：Enter constant-voltage charge mould if present battery charging current value is less than the lower limit of user's setting
Formula；Enter constant current charging mode if present battery charging current value is more than the higher limit of user's setting；
Step C）If between charging current lower limit and higher limit that present battery charging current value is set between user, basis
Present battery charging voltage value, contrasted by the charging voltage limit value set with user, so as to select different chargings
Pattern：Enter MPPT charge modes if present battery charging voltage value is less than the charging voltage limit value of user's setting；If work as
Preceding battery charging voltage is more than or equal to the charging voltage limit value that user is set and then enters constant-voltage charge pattern.
2. solar charging method for electrically according to claim 1, it is characterised in that the step C）In, according to detected value meter
Current solar panels output power value and power output average value are calculated, and is stored in register, by current power value and storage power
Average value is compared, and power output is adjusted by adjusting step-length：
If current power value is equal with storage power average value, do not adjust；If output power value and power output average value
It is unequal, then step-length is adjusted in either direction, if difference reduces, continues to adjust step-length towards the direction, until the two is equal；
If difference increases, step-length is adjusted in the opposite direction, until the two is equal；Calculated according to below equation：
Current solar panels power output=solar panels magnitude of voltage * solar panels current values,
Power output average value=（Upper cycle power output+this power output）/2.
3. solar charging method for electrically according to claim 1 or 2, it is characterised in that methods described is further comprising the steps of：
Step D）Detect current charge mode and write register, by judging to control load output：When cell voltage is less than
Load voltage limit value, close load output；When cell voltage is more than load voltage limit value, unlatching load output.
4. solar charging method for electrically according to claim 3, it is characterised in that：Under MPPT patterns, if present battery is electric
Pressure is less than solar cell panel voltages more than 2V, then reduces PWM pulsewidths, solar panels is rapidly achieved MPPT voltages.
5. solar charging method for electrically according to claim 1, it is characterised in that the step B）In, constant-voltage charge pattern
It is lower to be calculated according to below equation：
Regulation step-length=（This voltage error value）* P coefficients+（This voltage error value-last time voltage error value）* I coefficients,
Error amount=setting magnitude of voltage-actual voltage value,
Wherein, P coefficients are the proportionality coefficient that PI is controlled under constant-voltage charge pattern, and I coefficients are that PI is controlled under constant-voltage charge pattern
Integral coefficient.
6. solar charging method for electrically according to claim 1, it is characterised in that the step C）In, constant current charging mode
Calculated according to below equation：
Regulation step-length=（This current error value）* P coefficients+（This current error value-last time current error value）* I coefficients,
Error amount=setting current value-actual current value,
Wherein, P coefficients are the proportionality coefficient that PI is controlled under constant current charging mode, and I coefficients are that PI is controlled under constant current charging mode
Integral coefficient.
7. the solar charging method for electrically according to claim 1 to 6, it is characterised in that methods described also includes periodically examining
Survey Current Temperatures and be stored in register, judge current controller temperature, temperature is less than 30 DEG C of closing fans；Temperature is more than 45 DEG C then
Fan full speed running；Temperature is between 30 DEG C to 45 DEG C, then the rotating speed of fan calculates according to below equation：
Rotating speed percentage=20%+（（Current temperature value -30）*10 ）*20% .
A kind of 8. solar charging controller for electric consumption, it is characterised in that including：Detection unit（101）, computing unit（102）, charging
Mode selecting unit（103）, control unit（104）And load drive unit（105）；
The detection unit（101）Input be magnitude of voltage, the current value of solar panels and battery, and result is exported to calculating
Unit（102）；
The computing unit（102）Storage value in input voltage value, current value and register is calculated, and by structure
Export to charge mode selecting unit（103）；
The charge mode selecting unit（103）According to the result of calculation of input, different charge modes is selected；If present battery
Charging current value is less than the limit value lower limit that user is set and then enters constant-voltage charge pattern；If present battery charging current value is more than
The limit value upper limit that user is set then enters constant current charging mode；If the restriction that present battery charging current value is set between user
Between the lower limit and the upper limit of value, then according to present battery charging voltage value, by being contrasted with charging voltage setting value, selection
Different charge modes：Enter MPPT charging moulds if present battery charging voltage is less than the charging voltage limit value of user's setting
Formula；Enter constant-voltage charge pattern if present battery charging voltage is more than or equal to the charging voltage limit value of user's setting；It will fill
Power mode signal output is to control unit（104）；
Described control unit（104）Passed through according to the charge mode signal of input to load drive unit（105）Control, realize and drive
Dynamic load works.
9. a kind of solar recharging system, it is characterised in that including containing the solar charging controller for electric consumption described in claim 8
Solar panel（1）, with the solar energy energy cell panel（1）Connected BUCK converters（2）, for realizing maximum power point
Tracking；With the BUCK converters（2）Connected controller（3）, the BUCK converters are controlled for realizing（2）To what is be connected
Battery（5）Charged；Load driver（6）Respectively with the battery（5）, controller（3）, BUCK converters（2）With
Load（7）It is connected, in the controller（3）In the presence of be load supplying；485 interfaces（4）With the controller（3）Phase
Even, for realizing the signal communication between controller and 485 equipment.
10. described solar recharging system according to claim 9, it is characterised in that also including blue tooth interface, for realizing
It is attached with mobile electronic device, facilitates Field Force's debugging maintenance.
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Application publication date: 20180112 |