CN102570905B - Vehicle power supply system using solar energy and vehicle power supply control method - Google Patents
Vehicle power supply system using solar energy and vehicle power supply control method Download PDFInfo
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- CN102570905B CN102570905B CN201010620197.0A CN201010620197A CN102570905B CN 102570905 B CN102570905 B CN 102570905B CN 201010620197 A CN201010620197 A CN 201010620197A CN 102570905 B CN102570905 B CN 102570905B
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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
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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
- 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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- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The invention relates to renewable energy source technology, in particular relates to a vehicle power supply system using solar energy and a vehicle power supply control method. The vehicle power supply system comprises a solar cell unit, a main energy storage unit, an assistant energy storage unit and a power supply management unit which is connected with the solar cell unit, the main energy storage unit, the assistant energy storage unit and a vehicle electricity load, wherein the power supply management unit distributes energy between the main energy storage unit and the assistant energy storage unit according states of the main energy storage unit and the assistant energy storage unit. According to the vehicle power supply system, solar energy is stored in the main energy storage unit and the assistant energy storage unit, thus the utilization efficiency of the solar energy is greatly increased. Moreover, the solar energy is accumulated after being stored in a storage battery, and can be used for driving a larger load, thus the usability of the solar energy is improved. The vehicle power supply system can be well compatible with the traditional power vehicle, thereby having good practical applicability and being easy to popularize.
Description
Technical field
The present invention relates to renewable energy technologies, particularly a kind of automobile power supply system and automobile method for controlling power supply utilizing solar energy.
Background technology
Resource-constrained, with serious pollution traditional fossil fuel energy reduce day by day, so unlimited, the clean clean regenerative resource of resource becomes the focus that people pay close attention to.Wherein solar energy is as a kind of emerging green energy resource, never exhausted, pollution-free with it, not by the advantage such as resource advantage restriction, applied just rapidly.According to photovoltaic effect principle, the photovoltaic technology utilizing solar cell solar energy to be converted into electric energy is a very important technology, can realize the mankind to continuable global energy system transition.Generally believe in the world, in long-term energy strategy, solar energy power generating has prior status in many regenerative resources such as solar energy thermal-power-generating, wind power generation, ocean power generation, biomass power generation.Expect the year two thousand thirty photovoltaic generation and will account for 5% to 20% in the gross generation in the world.
Current industry has developed the technology of being originated as automobile energy by solar energy, but because solar energy impinges intensity is weak and unstable, conversion efficiency is low in addition, therefore the current energy source all as a supplement of the solar cell on automobile uses, and car electrics still need to depend on the generator of automobile and the energy storage of storage battery in many cases.Obviously, combinationally use neatly if main energy sources and makeup energy can be originated, then can increase substantially energy use efficiency and reduce environmental pollution.
Summary of the invention
An object of the present invention is to provide a kind of automobile power supply system utilizing solar energy, it can improve efficiency of energy utilization and improve driving force.
Above-mentioned purpose can be realized by following technical proposals.
Utilize an automobile power supply system for solar energy, comprising:
Solar battery cell;
Main energy-storage units;
Secondary energy-storage units; And
Power Management Unit, it is connected with described solar battery cell, described main energy-storage units, described secondary energy-storage units and electric load used for vehicles,
Wherein, described Power Management Unit according to the state of described main energy-storage units, described secondary energy-storage units, distribute energy between described main energy-storage units and described secondary energy-storage units.
Preferably, in above-mentioned automobile power supply system, the state of described main energy-storage units and described secondary energy-storage units is their dump energy.
Preferably, in above-mentioned automobile power supply system, described main energy-storage units and described secondary energy-storage units are storage battery or ultracapacitor, and the charge storage ability of described main energy-storage units is greater than the charge storage ability of described secondary energy-storage units.
Preferably, in above-mentioned automobile power supply system, described Power Management Unit comprises:
The the first adaptive charging circuit be connected with described main energy-storage units, for being the charging voltage being suitable for described main energy-storage units by the voltage transitions of input;
The the second adaptive charging circuit be connected with described secondary energy-storage units, for being the charging voltage being suitable for described secondary energy-storage units by the voltage transitions of input;
The voltage conversion circuit be connected with described electric load used for vehicles, for being the operating voltage being suitable for described electric load used for vehicles by the voltage transitions of input;
Controller;
Commutation circuit, is connected with described solar battery cell, described first and second adaptive charging circuit, described voltage conversion circuit and described controller, one or more for realizing in following mode of operation under the control of the controller:
A) described solar battery cell is connected to charge to described main energy-storage units with described first adaptive charging circuit; B) described solar cell is connected to charge to described secondary energy-storage units with described second adaptive charging circuit; C) described solar cell is connected to power to described electric load used for vehicles with described voltage conversion circuit; D) described second adaptive charging circuit is connected described secondary energy-storage units is charged to described main energy-storage units with described first adaptive charging circuit; E) described first adaptive charging circuit is connected with described voltage conversion circuit described main energy-storage units is powered to described electric load used for vehicles; And f) described second adaptive charging circuit is connected with described voltage conversion circuit to make described secondary energy-storage units power to described electric load used for vehicles.
Preferably, in above-mentioned automobile power supply system, described solar battery cell comprises:
Solar cell; And
The optimization output power circuit be connected with the output of described solar cell, for adjusting the power output of described solar cell, wherein, described optimization output power circuit applies disturbance and the size of more current solar cell power output and the power output in last cycle by the output voltage constantly to described solar cell, adjustment is controlled in real time, to realize the tracking to maximum power point to the working point of described solar cell.
Preferably, in above-mentioned automobile power supply system, described controller comprises:
Calculation element, for calculating the dump energy of described main energy-storage units and described secondary energy-storage units;
The communicator be connected with described calculation element, for obtaining the state parameter of main energy-storage units and described secondary energy-storage units and these state parameters being sent to described calculation element; And
Control strategy generating apparatus, for generating corresponding order according to the dump energy of described main energy-storage units and described secondary energy-storage units, realizes described mode of operation a)-f to make described commutation circuit) in one or more.
Preferably, in above-mentioned automobile power supply system, described control strategy generating apparatus generates corresponding order according to following manner:
If the dump energy of described main energy-storage units is more than or equal to first threshold, then generates and make described commutation circuit realize described mode of operation b) and order e);
If the dump energy of described main energy-storage units is less than described first threshold and is less than Second Threshold, then generate and make described commutation circuit realize order a) and d) of described mode of operation, wherein said first threshold is greater than described Second Threshold;
If the dump energy of described main energy-storage units is less than described first threshold but is greater than described Second Threshold, then generate and make described commutation circuit realize described mode of operation c) and order e).
Preferably, in above-mentioned automobile power supply system, described main energy-storage units and secondary energy-storage units are storage battery, and described dump energy characterizes with the SOC of described storage battery, and described calculation element calculates the SOC of described storage battery according to following manner:
When the time default more than one if automobile remains static and the electric current of described storage battery are less than a default current value, then calculate the SOC of described storage battery according to following formula:
SOC＝η1×[Es+I×(R0+Rr)]+η2
Wherein Es is the voltage of described storage battery, and I is the electric current of described storage battery, and R0 is the ohmic internal resistance of described storage battery, and Rr is the polarization resistance of described storage battery, and η 1 and η 2 is constant;
If the electric current that automobile is in running status or described storage battery is more than or equal to described default current value, then calculate the SOC of described storage battery according to following formula:
Wherein Δ t is the temperature boost value of described storage battery, and i (x) is for described storage battery is at the electric current of moment x, and t is for from initial time to current the experienced time, and a, b and c are constant.
Another object of the present invention is to provide a kind of automobile method for controlling power supply utilizing solar energy, and it can improve efficiency of energy utilization and improve driving force.
Above-mentioned purpose can be realized by following technical proposals.
Utilize an automobile method for controlling power supply for solar energy, the electric power system of described automobile comprises solar battery cell, main energy-storage units and secondary energy-storage units, and described method comprises the following steps:
Obtain the state parameter of described main energy-storage units and described secondary energy-storage units;
The dump energy of described main energy-storage units and described secondary energy-storage units is calculated according to the state parameter obtained;
According to the state of described main energy-storage units, described secondary energy-storage units, in described main energy-storage units, distribute energy between described secondary energy-storage units and described electric load used for vehicles.
Preferably, in above-mentioned automobile method for controlling power supply, according to following manner in described main energy-storage units, distribute energy between described secondary energy-storage units and described electric load used for vehicles:
If the dump energy of described main energy-storage units is more than or equal to first threshold, then generates and make described main energy-storage units power to described electric load used for vehicles and make described solar battery cell to the order of described secondary energy-storage units charging;
If the dump energy of described main energy-storage units is less than described first threshold and is less than Second Threshold, then generate the order that described solar battery cell and described secondary energy-storage units are charged to described main energy-storage units, wherein said first threshold is greater than described Second Threshold;
If the dump energy of described main energy-storage units is less than described first threshold but is greater than described Second Threshold, then generate the order that described solar cell and described main energy-storage units are powered to described electric load used for vehicles.
According to embodiments of the invention, solar energy is stored in main energy-storage units and secondary energy-storage units, therefore substantially increases the utilization ratio of solar energy.In addition, can take care of the pence after electrical power storage is in storage battery, be used for driving larger load, improve the ease for use of solar energy.Moreover, unnecessary solar energy is stored in main energy-storage units the phenomenon of the electricity deficiency occurred after automobile can also be avoided to leave unused for a long time.Again, can compatible traditional power automobile well according to the automobile power supply system of embodiments of the invention, therefore there is good practicality, be convenient to promote.
From following detailed description by reference to the accompanying drawings, above and other objects of the present invention and advantage will be made more completely clear.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the automobile power supply system according to one embodiment of the invention.
The internal structure schematic diagram that Fig. 2 is the Power Management Unit in the automobile power supply system shown in Fig. 1.
The internal structure schematic diagram that Fig. 3 is the controller in the Power Management Unit shown in Fig. 2.
The internal structure schematic diagram that Fig. 4 is the solar battery cell in the automobile power supply system shown in Fig. 1.
Fig. 5 carries out to the working point of solar cell the tactful schematic diagram controlling in real time adjustment for the optimization output power circuit in the solar battery cell shown in Fig. 4.
Fig. 6 is the flow chart of the automobile method for controlling power supply according to another embodiment of the present invention.
Embodiment
The present invention is illustrated below by according to the accompanying drawing of expression embodiment of the present invention.
In this manual, " connection " one word to should be understood between two unit directly transmit energy or signal, or indirectly transmit energy or signal through one or more Unit the 3rd, and alleged signal includes but not limited to the signal of the form of electricity, light and magnetic existence here.
Fig. 1 is the structured flowchart of the automobile power supply system according to one embodiment of the invention.
See Fig. 1, the automobile power supply system 10 of solar energy that utilizes of the present embodiment comprises solar battery cell 100, main energy-storage units 200, secondary energy-storage units 300 and Power Management Unit 400.Solar cell 100 is connected with main energy-storage units 200 and secondary energy-storage units 300 respectively through Power Management Unit 400, also connect through Power Management Unit 400 between main energy-storage units 200 and secondary energy-storage units 300, in addition, Power Management Unit 400 be connected with electric load used for vehicles 20 with by the Energy transfer from solar battery cell 100, main energy-storage units 200 and secondary energy-storage units 300 to electric load used for vehicles 20.In FIG, Power Management Unit 400 can according to the state (such as including but not limited to the dump energy etc. of main energy-storage units 200 and secondary energy-storage units 300) of main energy-storage units 200 and secondary energy-storage units 300, according to certain power supply strategy in solar battery cell 100, main energy-storage units 200, distribute energy between secondary energy-storage units 300 and electric load used for vehicles 20.Concrete power supply allocation strategy will be described in detail later.
The use electric loading 20 of automobile is construed as in automobile the equipment using electric power, and it such as includes but not limited to car light, air blast, air-conditioning and sound equipment and starter etc.
In the present embodiment, storage battery or ultracapacitor can be adopted as main energy-storage units 200 and secondary energy-storage units 300, and suppose that the charge storage ability of main energy-storage units 200 is greater than the charge storage ability of secondary energy-storage units 300.
The internal structure schematic diagram that Fig. 2 is the Power Management Unit in the automobile power supply system shown in Fig. 1.
See Fig. 2, Power Management Unit 400 comprises the first adaptive charging circuit 410, second adaptive charging circuit 420, voltage conversion circuit 430, controller 440 and commutation circuit 450, wherein, three input T1 of commutation circuit 450, T2 and T3 respectively with the solar battery cell 100 in Fig. 1, first adaptive charging circuit 410 is connected with the second adaptive charging circuit 420, three output T4, T5 and T6 is connected to the first adaptive charging circuit 410 respectively, second adaptive charging circuit 420 and voltage conversion circuit 430, in addition, the control end T7 of commutation circuit 450 is connected to controller 440.It should be understood that, each in terminal T1-T7 can comprise one or more input-output channel, such as T6 end can be a port comprising three input-output channels, is respectively used to the power supply of solar battery cell 100 pairs of electric load used for vehicles 20, the power supply of main energy-storage units 200 pairs of electric load used for vehicles 20 and the power supply of secondary energy-storage units 300 pairs of electric load used for vehicles 20.
First adaptive charging circuit 410 is connected with the main energy-storage units 200 in Fig. 1, take voltage transitions commutation circuit 450 provided as the charging voltage being suitable for main energy-storage units 200.Second adaptive charging circuit 420 is connected with the secondary energy-storage units 300 in Fig. 1, the voltage transitions that commutation circuit 450 can be provided is the charging voltage being suitable for secondary energy-storage units 300, can be also the charging voltage being suitable for main energy-storage units 200 by the voltage transitions of secondary energy-storage units 300 on the other hand.Voltage conversion circuit 430 is connected with the electric load used for vehicles 20 in Fig. 1, and the voltage transitions that commutation circuit 450 can be provided is the operating voltage being suitable for electric load used for vehicles 20.
Under the control of controller 440, commutation circuit 450 can realize following arbitrary mode of operation:
A) make T1 hold and T4 hold between connect, thus solar battery cell 100 is charged to main energy-storage units 200 through the first adaptive charging circuit 410.
B) make T1 hold and T5 hold between connect, thus solar battery cell 100 is charged to secondary energy-storage units 300 through the second adaptive charging circuit 420.
C) make T1 hold and T6 hold between connect, thus solar battery cell 100 is powered to electric load used for vehicles 20 through voltage conversion circuit 430.
D) make T4 hold to lead to T3 termination, thus secondary energy-storage units 300 is charged to main energy-storage units 200 through the second adaptive charging circuit 420 and the first adaptive charging circuit 410.
E) make T2 hold to lead to T6 termination, thus winner's energy-storage units 200 is powered to electric load used for vehicles 20 through the first adaptive charging circuit 410 and voltage conversion circuit 430.
F) make T3 hold to lead to T6 termination, thus secondary energy-storage units 300 is powered to electric load used for vehicles 20 through the second adaptive charging circuit 420 and voltage conversion circuit 430.
It is worthy of note, aforesaid operations state a)-f) can be compatible, also namely some mode of operation can coexist.Such as, mode of operation c) and e) can coexist thus realize the common power supply to electric load used for vehicles 20 of solar battery cell 100 and main energy-storage units 200, and for example, mode of operation c), e) and f) can coexist thus realize the common power supply to electric load used for vehicles 20 of solar battery cell 100, main energy-storage units 200 and secondary energy-storage units 300, for another example, mode of operation a) and b) can coexist thus realize solar battery cell 100 and charge to main energy-storage units 200 and secondary energy-storage units 300 simultaneously.
The internal structure schematic diagram that Fig. 3 is the controller in the Power Management Unit shown in Fig. 2.
See Fig. 3, controller 440 comprises calculation element 441, communicator 442 and control strategy generating apparatus 443, wherein calculation element 441 is connected with control strategy generating apparatus 443 with communicator 442, and control strategy generating apparatus 443 is also connected with the control end T7 of the commutation circuit 450 in Fig. 2.
In figure 3, communicator 442 such as obtains the state parameter (such as including but not limited to the temperature of energy-storage units, electric current and voltage etc.) of main energy-storage units 200 and secondary energy-storage units 300 from the transducer be connected to bus and the state parameter of acquisition is sent to calculation element 441.Calculation element 441 calculates the dump energy of main energy-storage units 200 and secondary energy-storage units 300 according to above-mentioned state parameter and the result calculated is delivered to control strategy generating apparatus 443.The mode that relevant calculation device 441 calculates dump energy will be further described below.
Control strategy generating apparatus 443 is cores of controller 440, order accordingly for generating according to the dump energy of main energy-storage units 200 and secondary energy-storage units 300 and export the control end T7 of commutation circuit 450 to, realizing connection status recited above a)-f to make the commutation circuit 450 in Fig. 2) in one or more.
The concrete mode that control strategy generating apparatus 443 generates order is below described.
If the dump energy of main energy-storage units 200 is more than or equal to first threshold Th1, then control strategy generating apparatus 443 generation is made commutation circuit 450 realize aforesaid operations mode b and) order e).In the present embodiment, can be considered when the dump energy of main energy-storage units 200 is greater than first threshold Th1 this energy-storage units store enough electricity meet electric load used for vehicles demand and without the need to supplementary electricity.Now for avoiding solar energy to be wasted, solar battery cell 100 is charged to secondary energy-storage units 300.
If the dump energy of main energy-storage units 200 is less than Second Threshold Th2 (supposing Th1 > Th2 here), then generation makes commutation circuit 450 realize order a) and d) of aforesaid operations mode by control strategy generating apparatus 443.In the present embodiment, can be considered that when the dump energy of main energy-storage units 200 is less than Second Threshold Th2 this energy-storage units needs to supplement electricity immediately, because main energy-storage units 200 is responsible for the power supply in automobile starting stage, therefore start successfully for ensureing, now solar battery cell 100 and secondary energy-storage units 300 will charge the dump energy of main energy-storage units 200 is returned to rapidly on the level of Second Threshold Th2 to main energy-storage units 200 simultaneously.
If the dump energy of main energy-storage units 200 is less than first threshold Th1 but is greater than Second Threshold Th2, then generation makes commutation circuit 450 realize aforesaid operations mode c by control strategy generating apparatus 443) and order e).In the present embodiment, can be considered that when the dump energy of main energy-storage units 200 is between first threshold Th1 and Second Threshold Th2 this energy-storage units has the possibility of potential supplementary electricity, therefore for preventing the dump energy of main energy-storage units 200 to be consumed too fast, now powered to electric load used for vehicles 20 by solar battery cell 100 and main energy-storage units 300 simultaneously.
Below describe the mode that calculation element 441 calculates dump energy, in this mode, suppose that main energy-storage units 200 and secondary energy-storage units 300 are storage battery, therefore dump energy characterizes with the SOC of storage battery.
The basic thought of which is proposed by inventor, main points first storage battery are divided into two states, namely internal storage battery Stability Analysis of Structures and the less state (being also called state 1 below) of the electric current flowed through and internal storage battery structural instability or the larger state (being also called state 2 below) of the electric current that flows through, then adopt different algorithms for different states.
Inventor finds through research, and after automobile remains static and exceedes a period of time, the internal structure of storage battery is generally more stable; Inventor also finds, automobile remain static exceed a period of time after and the electric current of storage battery is less than certain current value (this value experimentally can be determined and substantially keep fixing at battery-operated life period for one piece of storage battery) time, the accuracy of the SOC of the storage battery calculated with following formula (1) is higher:
SOC＝η1×[Es+I×(R0+Rr)]+η2 (1)
Wherein Es is the voltage of storage battery, and I is the electric current of storage battery, and R0 is the ohmic internal resistance of storage battery, and Rr is the polarization resistance of storage battery, and η 1 and η 2 is constant (can be determined by experiment).
On the other hand, when the electric current that automobile is in running status or storage battery is more than or equal to above-mentioned current value, inventor finds that the precision of the result calculated by formula (1) can not make us satisfied, now should adopt the SOC of Current integrating method calculating accumulator.
Because temperature has an impact to the SOC of storage battery, therefore in order to obtain accurate result, temperature factor should be taken into account.Inventor finds through research, and following formula (2) can reflect the impact of temperature on the SOC calculated according to Current integrating method preferably:
Wherein Δ t is the temperature boost value of storage battery, and i (x) is for storage battery is at the electric current of moment x, and t is for from initial time to current the experienced time, and a, b and c are the constant experimentally determined.
In a word, according to above-mentioned account form, first judge that storage battery is in state 1 or state 2, if be in the former, then utilize the SOC of formula (1) calculating accumulator, otherwise utilize the SOC of formula (2) calculating accumulator.
It is to be noted; in the present embodiment; calculation element 441 and control strategy generating apparatus 443 can mainly realize (such as operating in the computer program in general-purpose computing system) in the mode of software; also can the mode of hardware or firmware realize, these variation patterns all belong to the protection range of claims after the present invention.
The internal structure schematic diagram that Fig. 4 is the solar battery cell in the automobile power supply system shown in Fig. 1.
As shown in Figure 4, the solar battery cell 100 optimization output power circuit 120 that comprises solar cell 110 and be connected with the output of solar cell.In the present embodiment, the commutation circuit 450 that will be sent in shown in Fig. 2 of the power output of optimization output power circuit 120.
In the diagram, optimization output power circuit 120 realizes the optimization of the power output of solar cell 110 by the tracking of the maximum power point to solar cell 110.
The tactful schematic diagram controlling adjustment is in real time carried out in the working point that Fig. 5 is the optimization output power circuit 120 pairs of solar cells 110 in the solar battery cell 100 shown in Fig. 4.In Figure 5, transverse axis represents the output voltage U of solar cell 110, and the longitudinal axis represents the power output P of solar cell 110.As shown in Figure 5, optimization output power circuit 120 applies disturbance (with arrows up and down in Fig. 5) by the output voltage constantly to solar cell 110 and the size of more current solar cell power output and the power output in last cycle (is also consecutive points (A paired in A-E point in Figure 5, B), (B, C), (C, and (D D), E)), adjustment is controlled in real time to the working point of solar cell 110, tracking to maximum power point can be realized thus (shown in Fig. 5 when, maximum power point is C, power and the voltage of its correspondence are respectively Pm and Um).Compared with not adopting the situation of power optimization circuit 120, at least can improve 30% according to the power output of the solar battery cell 100 of the present embodiment, when illumination deficiency, even can improve 130%.
Fig. 6 is the flow chart of the automobile method for controlling power supply according to another embodiment of the present invention.
For convenience of description, suppose that the present embodiment is applied to the automobile power supply system shown in Fig. 1.See Fig. 6, in step 610, the state parameter of main energy-storage units 200 and secondary energy-storage units 300 is obtained.This step can obtain by the transducer be arranged near these energy-storage units.
Then in step 620, the dump energy of main energy-storage units and secondary energy-storage units is calculated according to the state parameter obtained.Although give the account form of dump energy above for storage battery, it should be understood that and other method also can be adopted to calculate dump energy.
Subsequently, in act 630, judge whether the dump energy of main energy-storage units 200 is more than or equal to first threshold Th1, if so, then enters step 640, otherwise enters step 650.
In step 640, main energy-storage units 200 is made to power to electric load used for vehicles 20 and solar battery cell 100 is charged to secondary energy-storage units 300.
In step 650, judge whether the dump energy of main energy-storage units 200 is less than Second Threshold Th2 (supposing that Second Threshold Th2 is less than first threshold Th1), if so, then enters step 660, otherwise enters step 670.
In step 660, solar battery cell 100 and secondary energy-storage units 300 charge to main energy-storage units 200.
In step 670, the dump energy due to main energy-storage units is less than first threshold Th1 but is greater than Second Threshold Th2, therefore makes solar cell 100 and main energy-storage units 200 power to electric load used for vehicles 20.
Due to can under the spirit not deviating from essential characteristic of the present invention, implement the present invention in a variety of manners, therefore present embodiment is illustrative and not restrictive, because scope of the present invention is defined by claims, instead of defined by specification, therefore fall into all changes in the border of claim and boundary, or thus the equivalent of this claim border and boundary is forgiven by claim.
Claims (9)
1. utilize an automobile power supply system for solar energy, it is characterized in that, comprising:
Solar battery cell;
Main energy-storage units, is responsible for the power supply in automobile starting stage;
Secondary energy-storage units; And
Power Management Unit, it is connected with described solar battery cell, described main energy-storage units, described secondary energy-storage units and electric load used for vehicles,
Wherein, described Power Management Unit according to the state of described main energy-storage units and described secondary energy-storage units, in described solar battery cell, described main energy-storage units, distribute energy between described secondary energy-storage units and described electric load used for vehicles,
Wherein, described Power Management Unit comprises:
The the first adaptive charging circuit be connected with described main energy-storage units, for being the charging voltage being suitable for described main energy-storage units by the voltage transitions of input;
The the second adaptive charging circuit be connected with described secondary energy-storage units, for being the charging voltage being suitable for described secondary energy-storage units by the voltage transitions of input;
The voltage conversion circuit be connected with described electric load used for vehicles, for being the operating voltage being suitable for described electric load used for vehicles by the voltage transitions of input;
Controller;
Commutation circuit, is connected with described solar battery cell, described first and second adaptive charging circuit, described voltage conversion circuit and described controller, one or more for realizing in following mode of operation under the control of the controller:
A) described solar battery cell is connected to charge to described main energy-storage units with described first adaptive charging circuit; B) described solar battery cell is connected to charge to described secondary energy-storage units with described second adaptive charging circuit; C) described solar battery cell is connected to power to described electric load used for vehicles with described voltage conversion circuit; D) described second adaptive charging circuit is connected described secondary energy-storage units is charged to described main energy-storage units with described first adaptive charging circuit; E) described first adaptive charging circuit is connected with described voltage conversion circuit described main energy-storage units is powered to described electric load used for vehicles; And f) described second adaptive charging circuit is connected with described voltage conversion circuit to make described secondary energy-storage units power to described electric load used for vehicles,
Wherein, described controller comprises:
Calculation element, for calculating the dump energy of described main energy-storage units and described secondary energy-storage units;
The communicator be connected with described calculation element, for obtaining the state parameter of main energy-storage units and described secondary energy-storage units and these state parameters being sent to described calculation element; And
Control strategy generating apparatus, for generating corresponding order according to the dump energy of described main energy-storage units and described secondary energy-storage units, realizes described mode of operation a)-f to make described commutation circuit) in one or more,
Wherein, described control strategy generating apparatus generates corresponding order according to following manner:
If the dump energy of described main energy-storage units is more than or equal to first threshold, then generates and make described commutation circuit realize described mode of operation b) and order e);
If the dump energy of described main energy-storage units is less than described first threshold and is less than Second Threshold, then generate and make described commutation circuit realize order a) and d) of described mode of operation, wherein said first threshold is greater than described Second Threshold;
If the dump energy of described main energy-storage units is less than described first threshold but is greater than described Second Threshold, then generate and make described commutation circuit realize described mode of operation c) and order e).
2. automobile power supply system as claimed in claim 1, wherein, the state of described main energy-storage units and described secondary energy-storage units is their dump energy.
3. automobile power supply system as claimed in claim 2, wherein, described main energy-storage units and described secondary energy-storage units are storage battery or ultracapacitor, and the charge storage ability of described main energy-storage units is greater than the charge storage ability of described secondary energy-storage units.
4. automobile power supply system as claimed in claim 1, wherein, described solar battery cell comprises:
Solar cell; And
The optimization output power circuit be connected with the output of described solar cell, for adjusting the power output of described solar cell, wherein, described optimization output power circuit applies disturbance and the size of more current solar cell power output and the power output in last cycle by the output voltage constantly to described solar cell, adjustment is controlled in real time, to realize the tracking to maximum power point to the working point of described solar cell.
5. automobile power supply system as claimed in claim 1, wherein, described main energy-storage units and secondary energy-storage units are storage battery, and described dump energy characterizes with the SOC of described storage battery, and described calculation element calculates the SOC of described storage battery according to following manner:
When the time default more than one if automobile remains static and the electric current of described storage battery are less than a default current value, then calculate the SOC of described storage battery according to following formula:
SOC＝η1×[Es+I×(R0+Rr)]+η2
Wherein Es is the voltage of described storage battery, and I is the electric current of described storage battery, and R0 is the ohmic internal resistance of described storage battery, and Rr is the polarization resistance of described storage battery, and η 1 and η 2 is constant;
If the electric current that automobile is in running status or described storage battery is more than or equal to described default current value, then calculate the SOC of described storage battery according to following formula:
Wherein Δ t is the temperature boost value of described storage battery, and i (x) is for described storage battery is at the electric current of moment x, and t is for from initial time to current the experienced time, and a, b and c are constant.
6. one kind utilizes the automobile method for controlling power supply of solar energy, it is characterized in that, the electric power system of described automobile comprises solar battery cell, main energy-storage units and secondary energy-storage units, and described main energy-storage units is responsible for the power supply in automobile starting stage, and described method comprises the following steps:
Obtain the state parameter of described main energy-storage units and described secondary energy-storage units;
The dump energy of described main energy-storage units and described secondary energy-storage units is calculated according to the state parameter obtained; And
According to the state of described main energy-storage units, described secondary energy-storage units, in described solar battery cell, main energy-storage units, distribute energy between described secondary energy-storage units and described electric load used for vehicles,
Wherein, according to following manner in described main energy-storage units, distribute energy between described secondary energy-storage units and described electric load used for vehicles:
If the dump energy of described main energy-storage units is more than or equal to first threshold, then generates and make described main energy-storage units power to described electric load used for vehicles and make described solar battery cell to the order of described secondary energy-storage units charging;
If the dump energy of described main energy-storage units is less than described first threshold and is less than Second Threshold, then generate the order that described solar battery cell and described secondary energy-storage units are charged to described main energy-storage units, wherein said first threshold is greater than described Second Threshold;
If the dump energy of described main energy-storage units is less than described first threshold but is greater than described Second Threshold, then generate the order that described solar battery cell and described main energy-storage units are powered to described electric load used for vehicles.
7. automobile method for controlling power supply as claimed in claim 6, wherein, the state of described main energy-storage units and described secondary energy-storage units is their dump energy.
8. automobile method for controlling power supply as claimed in claim 6, described main energy-storage units and described secondary energy-storage units are storage battery or ultracapacitor, and the charge storage ability of described main energy-storage units is greater than the charge storage ability of described secondary energy-storage units.
9. automobile method for controlling power supply as claimed in claim 7, wherein, described main energy-storage units and secondary energy-storage units are storage battery, and described dump energy characterizes with the SOC of described storage battery, and described calculation element calculates the SOC of described storage battery according to following manner:
When the time default more than one if automobile remains static and the electric current of described storage battery are less than a default current value, then calculate the SOC of described storage battery according to following formula:
SOC＝η1×[Es+I×(R0+Rr)]+η2
Wherein Es is the voltage of described storage battery, and I is the electric current of described storage battery, and R0 is the ohmic internal resistance of described storage battery, and Rr is the polarization resistance of described storage battery, and η 1 and η 2 is constant;
If the electric current that automobile is in running status or described storage battery is more than or equal to described default current value, then calculate the SOC of described storage battery according to following formula:
Wherein Δ t is the temperature boost value of described storage battery, and i (x) is for described storage battery is at the electric current of moment x, and t is for from initial time to current the experienced time, and a, b and c are constant.
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| CN103956529B (en) * | 2014-04-30 | 2017-02-15 | 华为技术有限公司 | Power supply method, device and system |
| CN107957742B (en) * | 2017-10-20 | 2020-11-13 | 宝沃汽车（中国）有限公司 | Power supply method and device of electric automobile, photovoltaic controller and electric automobile |
| CN111994020B (en) * | 2020-07-21 | 2022-02-01 | 东风汽车集团有限公司 | Vehicle-mounted photovoltaic auxiliary power supply method for electric vehicle, photovoltaic controller and power supply equipment |
| CN113627724B (en) * | 2021-07-02 | 2024-04-05 | 江苏能电科技有限公司 | Method and device for reasonably distributing electric quantity, storage medium and solar street lamp equipment |
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| CN1169550A (en) * | 1996-07-01 | 1998-01-07 | 杨泰和 | Compound power system using associated rotating-speed and torque differential detecting device for ratio control |
| CN201128379Y (en) * | 2007-11-23 | 2008-10-08 | 吉林市北华航天科技有限公司 | Solar energy-super capacitor hybrid power supply for vehicle |
| CN201576944U (en) * | 2009-12-07 | 2010-09-08 | 浙江光益光能科技有限公司 | Vehicular solar energy mobile power supply |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1169550A (en) * | 1996-07-01 | 1998-01-07 | 杨泰和 | Compound power system using associated rotating-speed and torque differential detecting device for ratio control |
| CN201128379Y (en) * | 2007-11-23 | 2008-10-08 | 吉林市北华航天科技有限公司 | Solar energy-super capacitor hybrid power supply for vehicle |
| CN201576944U (en) * | 2009-12-07 | 2010-09-08 | 浙江光益光能科技有限公司 | Vehicular solar energy mobile power supply |
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