CN202309195U - Power supply system for solar refrigerator - Google Patents
Power supply system for solar refrigerator Download PDFInfo
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- CN202309195U CN202309195U CN2011204114126U CN201120411412U CN202309195U CN 202309195 U CN202309195 U CN 202309195U CN 2011204114126 U CN2011204114126 U CN 2011204114126U CN 201120411412 U CN201120411412 U CN 201120411412U CN 202309195 U CN202309195 U CN 202309195U
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- storage battery
- solar energy
- energy refrigerator
- controller
- electric power
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
The utility model discloses a power supply system for a solar refrigerator, which comprises a storage battery, a first switching unit, a photocell and a controller, wherein the storage battery is used for supplying power to the solar refrigerator; a first end of the photocell is connected with a first electrode of the storage battery, and a second end is connected with a second electrode of the storage battery through the first switching unit; the photocell is used for generating power by using solar energy; and the controller is respectively connected with the first switching unit and the storage battery, and used for controlling the first switching unit to close when detecting that the storage battery needs charging, and controlling the first switching unit to open when detecting that the storage battery does not need charging. The utility model can reduce the photocell loss and prolong the service life of the photocell.
Description
Technical field
The utility model relates to the power supply field, in particular to a kind of electric power system of solar energy refrigerator.
Background technology
In the prior art, when solar energy refrigerator is supplied power, adopt the mode of photocell and storage battery parallel powering to supply power often; Promptly; Photocell all is connected with solar energy refrigerator with storage battery, and at this moment, photocell needs in running order always; Cause the photocell loss ratio bigger, reduced photronic useful life.
The utility model content
The main purpose of the utility model is to provide a kind of electric power system of solar energy refrigerator, and is bigger with photocell loss ratio in the solution prior art, the problem that the life-span is lower.
To achieve these goals, according to an aspect of the utility model, a kind of electric power system of solar energy refrigerator is provided.The electric power system of this solar energy refrigerator comprises: storage battery is used for supplying power to solar energy refrigerator; First switch element; Photocell, first end are connected in first electrode of storage battery, and second end is connected in second electrode of storage battery via first switch element, is used to utilize solar power generation; And controller, be connected with storage battery with first switch element respectively, be used for detecting that to control first switch element when storage battery need charge closed, and control first switch element when storage battery need not charge and break off detecting.
Further, first switch element comprises: first switch and second switch are connected between second electrode of photronic second end and storage battery; And the pwm power driver module, first end and second end are connected to first switch and second switch, and the 3rd end is connected in controller.
Further, the electric power system of solar energy refrigerator also comprises: the second switch unit, be connected with controller, and wherein, storage battery is connected with solar energy refrigerator via the second switch unit.
Further, the electric power system of solar energy refrigerator also comprises: temperature sensor is used to detect the temperature of the fin of controller; And output protection and power drive, be connected with temperature sensor via controller, be used to judge whether the temperature of fin surpasses preset value, and when the temperature of fin surpasses preset value, cut off the input and output loop.
Further, between photronic first end and second end, be provided with Transient Voltage Suppressor.
Further, first end of storage battery is connected respectively with solar energy refrigerator with photronic first end via first node, and between first end of first node and storage battery, is provided with fuse.
Further, the electric power system of solar energy refrigerator also comprises: current sensor is arranged between the electrode and solar energy refrigerator of storage battery, and is connected in controller.
Further, controller comprises: first testing circuit is used to detect storage battery and whether needs charging; Whether second testing circuit is used to detect storage battery and is full of; And first control unit, be used for when detecting storage battery and be full of, controlling first switch element and breaking off to break off being connected of storage battery and solar cell.
Further, controller comprises: three testing circuit, and whether be used to connect solar energy refrigerator has the electric weight demand to detect solar energy refrigerator; And second control unit, be used for when three testing circuit detects solar energy refrigerator the electric weight demand is arranged, controlling the first switch element closure to connect storage battery and solar energy refrigerator.
Through the utility model, adopt the electric power system of the solar energy refrigerator that comprises following structure: storage battery is used for supplying power to solar energy refrigerator; First switch element; Photocell, first end are connected in first electrode of storage battery, and second end is connected in second electrode of storage battery via first switch element, is used to utilize solar power generation; And controller, be connected with storage battery with first switch element respectively, be used for detecting that to control first switch element when storage battery need charge closed; And control first switch element when storage battery need not charge and break off detecting; Owing to only supply power to solar energy refrigerator through storage battery, and when storage battery need not charge, photovoltaic cell need not to charge a battery; Thereby it is bigger to have solved in the prior art photocell loss ratio; The problem that life-span is lower, and then reached the loss of reduction photocell, prolong the photocell effect in useful life.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide the further understanding to the utility model, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:
Fig. 1 is the sketch map according to the solar energy refrigerator system of the utility model embodiment;
Fig. 2 is the annexation sketch map according to the solar energy refrigerator system of the utility model embodiment;
Fig. 3 is the annexation sketch map according to the solar energy refrigerator electric power system of the utility model embodiment;
Fig. 4 is according to the intensity of sunshine of the utility model embodiment curve chart to the solar module influence;
Fig. 5 is the sketch map that discharges and recharges control according to the controller of the utility model embodiment;
Fig. 6 is the charging process sketch map according to the utility model embodiment;
Fig. 7 is the sketch map that carries out refrigerator control according to the controller of the utility model embodiment;
Fig. 8 is the flow chart according to the solar energy refrigerator method for controlling power supply of the utility model embodiment;
Fig. 9 is the control method flow chart according to the electric power supply control system of the utility model embodiment; And
Figure 10 is the flow chart according to the control method of the refrigerator control system of the utility model embodiment.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.Below with reference to accompanying drawing and combine embodiment to specify the utility model.
Fig. 1 is the sketch map according to the electric power system of the solar energy refrigerator of the utility model embodiment.
As shown in Figure 1, the electric power system of this solar energy refrigerator comprises storage battery, controller, first switch element and photocell (photovoltaic array).
Storage battery is used for supplying power to solar energy refrigerator.
Photronic first end is connected in first electrode of storage battery, and photronic second end is connected in second electrode of storage battery via first switch element, is used to utilize solar power generation.
Controller is connected with storage battery with first switch element respectively, is used for detecting that to control first switch element when storage battery need charge closed, and controls first switch element when storage battery need not charge and break off detecting.
In the electric power system of above-mentioned solar energy refrigerator; Owing to only directly supply power, and when storage battery need not charge, control first switch element and break off to solar energy refrigerator through storage battery; Make that photovoltaic cell need not to charge a battery; Thereby photocell need not the state of always dealing with the work, and then reduced photronic loss, prolonged photronic useful life.
In the utility model, because electric power system and refrigerator control system are independent fully, help the versatility and the expansion of two modules, be convenient to modularized design and production.Refrigerator, controller, storage battery and photronic annexation are as shown in Figure 2, and refrigerator system can adopt 24V direct current supply, and press, heater strip, air door, refrigerator controller are the 24V power voltage supply.
A preferred embodiment as the electric power system of solar energy refrigerator; First switch element can also comprise: the first switch Q1 and second switch Q2 and pwm power driver module; As shown in Figure 3; The first switch Q1 and second switch Q2 are connected between second electrode of photronic second end and storage battery, and first end of pwm power driver module and second end are connected to the first switch Q1 and second switch Q2, and the 3rd end of pwm power driver module is connected in controller.In this application,, can guarantee fail safe better, when Q1 or Q2 damage, be unlikely to cause the charge circuit short circuit and cause that the overshoot that charging control fails accumulators is caused damages through adopting Q1 and two switches of Q2.In addition, further preferably, the first switch Q1 and second switch Q2 can adopt power MOSFET to reduce loss and to raise the efficiency.
Preferably, the electric power system of solar energy refrigerator also comprises: the second switch unit, be connected with controller, and wherein, storage battery is connected with solar energy refrigerator via the second switch unit.Wherein, as shown in Figure 3, the second switch unit can comprise switch Q3.
Preferably, the electric power system of solar energy refrigerator can also comprise: temperature sensor is used to detect the temperature of the fin of controller; And output protection and power drive, be connected with temperature sensor via controller, be used to judge whether the temperature of fin surpasses preset value, and when the temperature of fin surpasses preset value, cut off the input and output loop.
Preferably, between photronic first end and second end, be provided with Transient Voltage Suppressor TVS.
Preferably, first end of storage battery is connected respectively with solar energy refrigerator with photronic first end via first node, and between first end of first node and storage battery, is provided with fuse FUSE.
Preferably, the electric power system of solar energy refrigerator also comprises: current sensor is arranged between the electrode and solar energy refrigerator of storage battery, and is connected in controller.Through between the electrode of storage battery and solar energy refrigerator, current sensor being set, can, output current cut off output loop when exceeding preset range automatically so that current sensor detects the output current size constantly.
Preferably, controller comprises: first testing circuit is used to detect storage battery and whether needs charging; Whether second testing circuit is used to detect storage battery and is full of; And first control unit, be used for when detecting storage battery and be full of, controlling first switch element and breaking off to break off being connected of storage battery and solar cell.
Preferably, controller comprises: three testing circuit, and whether be used to connect solar energy refrigerator has the electric weight demand to detect solar energy refrigerator; And second control unit, be used for when three testing circuit detects solar energy refrigerator the electric weight demand is arranged, controlling the first switch element closure to connect storage battery and solar energy refrigerator.
Photocell among the utility model embodiment only just generates electricity when illumination is arranged.Wherein, when having judged whether illumination, can judge according to following method:
Illumination is mapped to and produces " photovoltage " on the photovoltaic panel, judges magnitude of voltage substantially constant under the different illumination intensity according to the I-V curve, and only voltage is zero under unglazed situation, and controller detects voltage and promptly has been judged to be illumination.Fig. 4 shows the influence of intensity of sunshine to solar module.
When illumination was arranged, controller control solar cell generated electricity automatically, and storage battery needs charging; Controller control solar cell charges a battery, if battery is full of, cuts off solar cell automatically; Be off state; If refrigerator has the electric weight demand, directly to the refrigerator power supply, storage battery can discharge and recharge storage battery simultaneously.
When unglazed the photograph, supply power to refrigerator by storage battery.
Photocell produces photovoltaic voltage and supplies power to controller; TVS is a Transient Voltage Suppressor; Prevent that photocell electric voltage exception damage controller and internal circuit MCU computer controller from judging whether to charge a battery according to the charge in batteries characteristic curve, carry out storage battery PWM serial connection charge through control pwm power driver module control switch Q1, Q2.Whether unusual at output output protection and power driver module according to the current value judgement output that current sensor S1 tests; Overpower whether; Simultaneous temperature transducer T1 does overtemperature protection, and when the controller heatsink temperature surpassed 85 ℃, controller can cut off input, output loop automatically; Make battery-operated simultaneously under desirable operating state, prolong storage battery useful life.Excessive when the photocell electric current that charges a battery, fuse FUSE breaks off with the protection storage battery.
Storage battery can discharge and recharge simultaneously: photocell and storage battery constitute charge circuit, and storage battery and refrigerator constitute discharge loop, and charge circuit and discharge loop are for being connected in parallel on the storage battery two ends.When detecting battery and need charge, switch Q1 and switch Q2 open and charge a battery.Discharge end is connected on the controller of refrigerator, and refrigerator controller is according to the start-stop of the variation control freezer compressor of internal temperature of refrigerator.
When storage battery need not charge, switch Q1 and switch Q2 turn-offed, and this moment, photocell was in unloaded open-circuit condition, and illumination more strongly can be not lossy yet.Can reduce the loss of photovoltaic cell module like this, reduce hot spot effect.Prolong the photronic life-span.
The control circuit of the utility model can comprise battery charging circuit and system's power supply circuits, through adopting autonomous power supply system, need not the self discharge circuit, has effectively improved the stability and the life-span of assembly.Storage battery can discharge and recharge operation simultaneously, has improved the utilance of photovoltaic generation greatly.
Fig. 5 shows controller 2 corresponding input/output relations; Controller 2 is judged the whether needs charging of storage battery according to solar array voltage and battery tension signal 1 and charge in batteries characteristic curve 5; And to storage battery discharge and recharge control 3; And can carry out various demonstrations 4, for example, the solar cell output voltage shows, the storage battery output voltage shows, the load charging current shows, charged state shows, demonstration and alarm demonstration etc. make mistakes.
When the pwm power driver module drives the first switch Q1 and second switch Q2 closure; Promptly make storage battery and photocell constitute charge circuit; Owing to adopt advanced tandem type pulse-width modulation (PWM) mode, 0 to 100% wide region PWM regulates can be to the charging of storage battery fast and stable.
Below the charging process of the utility model is described in detail, as shown in Figure 6, charging process comprised with the next stage:
Quick charge stage (for example, 28.4V～31V)
In the quick charge stage, battery tension is not charged to the set point that is full of voltage as yet, and it is charge in batteries that controller will provide 100% available solar energy electric weight.
Improvement stage (for example, 27.6V～28.4V)
When charge in batteries arrived the set point of booster tension, controller constantly regulates charging current so that battery tension maintains the booster tension set point.Can prevent that like this storage battery is overheated, prevent that storage battery from producing gas.It is 120 minutes that storage battery remains on the time accumulative total that promotes the charging stage, forwards the floating charge stage then to.
The floating charge stage (for example, 26.4～27.6V)
After promoting the charging completion, controller then changes the floating charge control stage over to.After storage battery is full of fully, just no longer include more electrochemical reaction, at this moment all charging currents are converted into heat and bubbing.At this moment get into the floating charge stage, the floating charge stage charges with littler voltage and current, and in temperature that has reduced storage battery and bubbing, the floating charge stage is carried out very faint charging like this.The purpose of floating charge is the electric quantity consumption of compensation storage battery because of the less load generating of self discharge and system, keeps the full of accumulators store electric weight simultaneously.In the floating charge stage, load can continue to obtain electric power from storage battery.If the load of system has surpassed the solar recharging electric current, controller will no longer can maintain the floating charge set point to battery tension.Promote charging (26.4V) recovery set point if battery tension is lower than, controller will withdraw from the floating charge stage, get back to the quick charge stage.
When battery tension is lower than 25.2V, can low pressure break off with recovery voltage, can be set to the deboost that discharges with 21.6 volts with 24.4V as undervoltage alarm voltage.
When battery tension greater than discharge deboost (21.6V), storage battery is uninterruptedly to refrigerator power supply, whole charging and discharging process display screen can display module 4 corresponding state informations.
As shown in Figure 7, refrigerator CPU20 sets situation 50 according to temperature 10 and user in ring temperature and the refrigerator body and judges whether parts such as press, air door, blower fan, heater strip work, and shows 40 corresponding work state and parameters.
Need to prove that discharging and recharging the control of control and refrigerator can be that a controller is independently accomplished, and also can be to be divided into two independent controls to control respectively, that is, the CPU among Fig. 5 and Fig. 7 can refer to same controller, also can refer to two Different control devices.
Fig. 8 is the flow chart according to the solar energy refrigerator method for controlling power supply of the utility model embodiment.As shown in Figure 8, this method may further comprise the steps:
Step S602, whether detect storage battery needs charging;
Step S604, when definite storage battery need charge, the control photocell charged to storage battery;
Step S606 when definite storage battery need not charge, then controls photovoltaic cell and storage battery and breaks off.
In the method, owing to only supply power to solar energy refrigerator through storage battery, and when storage battery need not charge, photovoltaic cell need not to charge a battery, thereby had reduced the photocell loss, had prolonged photocell useful life.
Preferably, the control photocell charges to storage battery and comprises: controller detects the electrical energy parameter of storage battery; If greater than second parameter value, then controller control photovoltaic cell is taked the quick charge mode to storage battery to the electrical energy parameter of storage battery less than first parameter value; If greater than the 3rd parameter value, then controller control photovoltaic cell takes to promote charging modes to storage battery to the electrical energy parameter of storage battery less than second parameter value; If greater than the 4th parameter value, then controller control photovoltaic cell is taked the floating charge mode to storage battery to the electrical energy parameter of storage battery less than the 3rd parameter value.Through this r, not only can guarantee to charge efficiently, and can improve the life-span of storage battery.
Fig. 9 is the control method flow chart according to the electric power supply control system of the utility model embodiment.As shown in Figure 9, this method may further comprise the steps:
Step S901, the voltage of collection storage battery;
Step S902 judges whether the voltage of the storage battery that collects surpasses overshoot protection voltage, is under the situation that is in judged result, and execution in step S903 is under the situation not in judged result, execution in step S904.
Step S903 cuts off charge circuit.
Step S904 connects charge circuit.
Step S905 judges whether battery tension in the charging process was lower than to put protection voltage, is under the situation that is in judged result, execution in step S906, judged result for situation not under, execution in step S907.
Step S906 cuts off discharge loop.
Step S907 judges whether storage battery exists unusually, perhaps whether has fault, is under the situation that is in judged result, and execution in step S906 is under the situation not in judged result, execution in step S908.
Step S908 connects discharge loop.
Return execution in step S901.
Figure 10 is the flow chart according to the control method of the refrigerator control system of the utility model embodiment.Like Figure 10, this method may further comprise the steps:
Step S1001, the collecting temperature sensor temperature;
Step S1002 judges whether the temperature that collects reaches design temperature, is under the situation that is in judged result, and execution in step S1003 is under the situation not in judged result, execution in step S1004;
Step S1003 breaks off parts such as press, blower fan.
Step S1004 opens parts such as press, blower fan.
Need to prove; The control method that the utility model embodiment provides can through but the solar energy refrigerator system or the electric power system that are not limited to the utility model embodiment and are provided realize that each step in the control method among the different embodiment of the utility model can combine.
From above description, can find out that the utility model embodiment can improve the useful life of assemblies such as photocell.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the utility model.
Claims (9)
1. the electric power system of a solar energy refrigerator is characterized in that comprising:
Storage battery is used for supplying power to solar energy refrigerator;
First switch element;
Photocell, first end are connected in first electrode of said storage battery, and second end is connected in second electrode of said storage battery via said first switch element, is used to utilize solar power generation; And
Controller; Be connected with said storage battery with said first switch element respectively; Be used for detecting that to control said first switch element when said storage battery need charge closed, and control said first switch element when said storage battery need not charge and break off detecting.
2. the electric power system of solar energy refrigerator according to claim 1 is characterized in that, said first switch element comprises:
First switch and second switch are connected between second electrode of said photronic second end and said storage battery; And
The pwm power driver module, first end and second end are connected to said first switch and said second switch, and the 3rd end is connected in said controller.
3. the electric power system of solar energy refrigerator according to claim 1 is characterized in that, also comprises:
The second switch unit is connected with said controller,
Wherein, said storage battery is connected with said solar energy refrigerator via said second switch unit.
4. the electric power system of solar energy refrigerator according to claim 1 is characterized in that, also comprises:
Temperature sensor is used to detect the temperature of the fin of said controller; And
Output protection and power drive are connected with said temperature sensor via said controller, are used to judge whether the temperature of said fin surpasses preset value, and when the temperature of said fin surpasses said preset value, cut off the input and output loop.
5. the electric power system of solar energy refrigerator according to claim 1 is characterized in that, between said photronic first end and second end, is provided with Transient Voltage Suppressor.
6. the electric power system of solar energy refrigerator according to claim 1; It is characterized in that; First end of said storage battery is connected respectively with said solar energy refrigerator with said photronic first end via first node, and between first end of said first node and said storage battery, is provided with fuse.
7. the electric power system of solar energy refrigerator according to claim 1 is characterized in that, also comprises:
Current sensor is arranged between the electrode and said solar energy refrigerator of said storage battery, and is connected in said controller.
8. the electric power system of solar energy refrigerator according to claim 1 is characterized in that, said controller comprises:
First testing circuit is used to detect said storage battery and whether needs charging;
Whether second testing circuit is used to detect said storage battery and is full of; And
First control unit is used for when detecting said storage battery and be full of, and controls said first switch element and breaks off to break off being connected of said storage battery and said solar cell.
9. the electric power system of solar energy refrigerator according to claim 1 is characterized in that, said controller comprises:
Three testing circuit, whether be used to connect said solar energy refrigerator has the electric weight demand to detect said solar energy refrigerator; And
Second control unit is used for when said three testing circuit detects said solar energy refrigerator the electric weight demand is arranged, controlling the said first switch element closure to connect said storage battery and said solar energy refrigerator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204114126U CN202309195U (en) | 2011-10-25 | 2011-10-25 | Power supply system for solar refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204114126U CN202309195U (en) | 2011-10-25 | 2011-10-25 | Power supply system for solar refrigerator |
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| Publication Number | Publication Date |
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| CN202309195U true CN202309195U (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011204114126U Expired - Lifetime CN202309195U (en) | 2011-10-25 | 2011-10-25 | Power supply system for solar refrigerator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102437604A (en) * | 2011-10-25 | 2012-05-02 | 海尔集团公司 | Power supply system and power supply control method of solar refrigerator |
-
2011
- 2011-10-25 CN CN2011204114126U patent/CN202309195U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102437604A (en) * | 2011-10-25 | 2012-05-02 | 海尔集团公司 | Power supply system and power supply control method of solar refrigerator |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120704 |
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| CX01 | Expiry of patent term |