CN102555830B - Automobile power supply system based on double energy storage units and automobile power supply control method - Google Patents
Automobile power supply system based on double energy storage units and automobile power supply control method Download PDFInfo
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- CN102555830B CN102555830B CN201010620206.6A CN201010620206A CN102555830B CN 102555830 B CN102555830 B CN 102555830B CN 201010620206 A CN201010620206 A CN 201010620206A CN 102555830 B CN102555830 B CN 102555830B
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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
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The invention relates to the renewable energy source technology, in particular to an automobile power supply system based on double energy storage units and an automobile power supply control method. According to the invention, the automobile power supply system based on double energy storage units comprise a solar cell unit, a first energy storage unit, a second energy storage unit and a power supply management unit, wherein the power supply management unit is connected with the solar cell unit, the first energy storage unit, the second energy storage unit and an automobile electricity consumption load; and the power supply management unit distributes energy from the solar cell unit among the first energy storage unit, the second energy storage unit and the automobile electricity consumption load according to the residual power amount of the first energy storage unit and the second energy storage unit to ensure that the worse getting degrees of the performance of the first energy storage unit and the second energy storage unit are almost consistent. According to the embodiment of the invention, because the relationship between the residual power amounts of the double energy storage units is considered when an energy storage strategy is determined, the service life of the energy storage unit is almost kept consistent.
Description
Technical field
The present invention relates to renewable energy technologies, particularly a kind of automobile power supply system based on double-energy storage unit and automobile method for controlling power supply.
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 power 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 electricity generation, ocean power generation, biomass power generation.Expect 203O 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 power, 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 needs to depend on the electrical 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 based on double-energy storage unit, it can improve efficiency of energy utilization and extend the work life of energy-storage units on the whole.
Above-mentioned purpose can be realized by following technical proposals.
Based on an automobile power supply system for double-energy storage unit, comprising:
Solar battery cell;
First energy-storage units;
Second energy-storage units; And
PMU, it is connected with described solar battery cell, described first energy-storage units, described second energy-storage units and electric load used for vehicles,
Wherein, described PMU, according to the dump energy of described first energy-storage units and described second energy-storage units, is consistent with the degree of the degradation making described first and second energy-storage units substantially at described first energy-storage units, the energy distributed between described second energy-storage units and described electric load used for vehicles from described solar battery cell.
Preferably, in above-mentioned automobile power supply system, described first energy-storage units and described second energy-storage units have identical electric parameter.
Preferably, in above-mentioned automobile power supply system, described PMU comprises:
The the first adaptive charging circuit be connected with described first energy-storage units, for being the charging valtage being suitable for described first energy-storage units by the voltage transitions of input;
The the second adaptive charging circuit be connected with described second energy-storage units, for being the charging valtage being suitable for described second 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 operating mode under the control of the controller:
A) described solar battery cell is connected to charge to described first energy-storage units with described first adaptive charging circuit; B) described solar cell is connected to charge to described second 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 first adaptive charging circuit is connected described first energy-storage units is charged to described second energy-storage units with described second adaptive charging circuit; E) described second adaptive charging circuit is connected described second energy-storage units is charged to described first energy-storage units with described first adaptive charging circuit; F) described first adaptive charging circuit is connected with described voltage conversion circuit described first energy-storage units is powered to described electric load used for vehicles; And g) described second adaptive charging circuit is connected with described voltage conversion circuit to make described second energy-storage units power to described electric load used for vehicles.
Preferably, in above-mentioned automobile power supply system, described controller comprises:
Computer device, for calculating the dump energy of described first energy-storage units and described second energy-storage units;
The communicator be connected with described computer device, for obtaining the state parameter of the first energy-storage units and described second energy-storage units and these state parameters being sent to described computer device; And
Control policy generating apparatus, its generation is used for realizing described operating mode a)-g) in one or more order.
Preferably, in above-mentioned automobile power supply system, described control policy generating apparatus generates order according to following manner:
If the difference of the aviation value of dump energy within this period of the aviation value of the dump energy of described first energy-storage units within a period of time and described second energy-storage units is positioned at a default scope, then:
If the dump energy of described first and second energy-storage units is all more than or equal to default threshold value, then generates and make described commutation circuit realize described operating mode c), order f) and g);
If the dump energy that the dump energy of described first energy-storage units is more than or equal to described threshold value and described second energy-storage units is less than described threshold value, then generates and make described commutation circuit realize described operating mode b) and order f);
If the dump energy that the dump energy of described first energy-storage units is less than described threshold value and described second energy-storage units is more than or equal to described threshold value, then generates and make described commutation circuit realize order a) and g) of described operating mode;
If the dump energy of described first and second energy-storage units is all less than described threshold value, then generates and make described commutation circuit realize order a) and b) of described operating mode.Preferably, in above-mentioned automobile power supply system, described control policy generating apparatus generates order according to following manner:
If the difference of the aviation value of dump energy within this period of the aviation value of the dump energy of described first energy-storage units within a period of time and described second energy-storage units exceeds the upper limit of described default scope, then generate and make described commutation circuit realize described operating mode b) and order d);
If the difference of the aviation value of dump energy within this period of the aviation value of the dump energy of described first energy-storage units within a period of time and described second energy-storage units is less than the lower limit of described default scope, then generates and make described commutation circuit realize order a) and e) of described operating mode.
Preferably, in above-mentioned automobile power supply system, described first energy-storage units and the second energy-storage units are storage battery, and described dump energy characterizes with the SOC of described storage battery, and described computer device 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 state 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 △ 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 based on double-energy storage unit, and it can improve efficiency of energy utilization and extend the work life of energy-storage units on the whole.
Above-mentioned purpose can be realized by following technical proposals.
Based on an automobile method for controlling power supply for double-energy storage unit, the electric power system of described automobile comprises solar battery cell, the first energy-storage units and the second energy-storage units, and described method comprises the following steps:
Obtain the state parameter of described first energy-storage units and described second energy-storage units;
The dump energy of described first energy-storage units and described second energy-storage units is calculated according to the state parameter obtained; And
According to the dump energy of described first energy-storage units and described second energy-storage units, be substantially consistent with the degree of the degradation making described first and second energy-storage units at described first energy-storage units, the energy distributed between described second energy-storage units and described electric load used for vehicles from described solar battery cell.
Preferably, in above-mentioned automobile method for controlling power supply, described first energy-storage units and described second energy-storage units have identical electric parameter.
Preferably, in above-mentioned automobile method for controlling power supply, according to following manner at the described mat woven of fine bamboo strips one energy-storage units, distribute energy from described solar battery cell between described second energy-storage units and described electric load used for vehicles:
If the difference of the aviation value of dump energy within this period of the aviation value of the dump energy of described first energy-storage units within a period of time and described second energy-storage units is positioned at a default scope, then:
If the dump energy of described first and second energy-storage units is all more than or equal to default threshold value, then described solar battery cell, described first energy-storage units and described second energy-storage units is made to power to described electric load used for vehicles;
If the dump energy of described first energy-storage units is more than or equal to described threshold value and the dump energy of described second energy-storage units is less than described threshold value, then described solar battery cell and described first energy-storage units is made to power to described electric load used for vehicles;
If the dump energy of described first energy-storage units is less than described threshold value and the dump energy of described second energy-storage units is more than or equal to described threshold value, then described solar battery cell and described second energy-storage units is made to power to described electric load used for vehicles;
If the dump energy of described first and second energy-storage units is all less than described threshold value, then described solar battery cell is made to power to described first and second energy-storage units.
Preferably, in above-mentioned automobile method for controlling power supply, according to following manner at described first energy-storage units, distribute energy from described solar battery cell between described second energy-storage units and described electric load used for vehicles:
If the difference of the aviation value of dump energy within this period of the aviation value of the dump energy of described first energy-storage units within a period of time and described second energy-storage units exceeds the upper limit of described default scope, then make described solar battery cell and described first energy-storage units to described second energy-storage units charging;
If the difference of the aviation value of dump energy within this period of the aviation value of the dump energy of described first energy-storage units within a period of time and described second energy-storage units is less than the lower limit of described default scope, then make described solar battery cell and described second energy-storage units to described first energy-storage units charging.
According to embodiments of the invention, solar power is stored in the first energy-storage units and the second energy-storage units, can taking care of the pence for driving larger load, improving the ease for use of solar power.Moreover, owing to the relation between the dump energy of double-energy storage unit being taken into account, therefore, it is possible to make the work life of energy-storage units substantially be consistent when determining energy storage strategy.
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 inner structure schematic diagram that Fig. 2 is the PMU in the automobile power supply system shown in Fig. 1.
The inner structure schematic diagram that Fig. 3 is the controller in the PMU shown in Fig. 2.
The inner 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 operation 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 diagram of circuit of the automobile method for controlling power supply according to another embodiment of the present invention.
Detailed description of the invention
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 power that utilizes of the present embodiment comprises solar battery cell 100, first energy-storage units 200, second energy-storage units 300 and PMU 400.Solar cell 100 is connected with the first energy-storage units 200 and the second energy-storage units 300 respectively through PMU 400, also connect through PMU 400 between first energy-storage units 200 and the second energy-storage units 300, in addition, PMU 400 be connected with electric load used for vehicles 20 with by the Energy transfer from solar battery cell 100, first energy-storage units 200 and the second energy-storage units 300 to electric load used for vehicles 20.In FIG, PMU 400 can according to the state (such as including but not limited to the dump energy etc. of the first energy-storage units 200 and the second energy-storage units 300) of the first energy-storage units 200 and the second energy-storage units 300, according to certain power supply strategy distribute energy between solar battery cell 100, first energy-storage units 200, second 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 load 20 of automobile is construed as in automobile the equipment using electric power, and it such as includes but not limited to car light, blowing engine, air-conditioning and sound equipment and starter etc.
In the present embodiment, storage battery or ultracapacitor can be adopted as the first energy-storage units 200 and the second energy-storage units 300, and suppose that they have identical or consistent electric parameter.
The inner structure schematic diagram that Fig. 2 is the PMU in the automobile power supply system shown in Fig. 1.
See Fig. 2, PMU 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 end 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 mouth 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 the first energy-storage units 200 pairs of electric load used for vehicles 20 and the power supply of the second energy-storage units 300 pairs of electric load used for vehicles 20.
First adaptive charging circuit 410 is connected with the first energy-storage units 200 in Fig. 1, taking voltage transitions commutation circuit 450 provided as the charging valtage being suitable for the first energy-storage units 200, can be also the charging valtage being suitable for the second energy-storage units 300 by the voltage transitions of the first energy-storage units 200 on the other hand.Second adaptive charging circuit 420 is connected with the second energy-storage units 300 in Fig. 1, the voltage transitions that commutation circuit 450 can be provided is the charging valtage being suitable for the second energy-storage units 300, can be also the charging valtage being suitable for the first energy-storage units 200 by the voltage transitions of the second 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 serviceability:
A) make T1 hold and T4 hold between connect, thus solar battery cell 100 is charged to the first 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 the second 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 T2 hold to lead to T5 termination, thus the first energy-storage units 200 is charged to the second energy-storage units 300 through the first adaptive charging circuit 420 and the second adaptive charging circuit 410.
E) make T3 hold to lead to T4 termination, thus the second energy-storage units 300 is charged to the first energy-storage units 200 through the second adaptive charging circuit 420 and the first adaptive charging circuit 410.
F) make T2 hold to lead to T6 termination, thus the first 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.
G) make T3 hold to lead to T6 termination, thus the second 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)-g) can be compatible, also namely some serviceability can coexist.Such as, serviceability c) and e) can coexist thus realize the common power supply to electric load used for vehicles 20 of solar battery cell 100 and the first energy-storage units 200, and for example, serviceability c), e) and f) can coexist thus realize the common power supply to electric load used for vehicles 20 of solar battery cell 100, first energy-storage units 200 and the second energy-storage units 300, for another example, serviceability a) and b) can coexist thus realize solar battery cell 100 and charge to the first energy-storage units 200 and the second energy-storage units 300 simultaneously.
The inner structure schematic diagram that Fig. 3 is the controller in the PMU shown in Fig. 2.
See Fig. 3, controller 440 comprises computer device 441, communicator 442 and control policy generating apparatus 443, wherein computer device 441 is connected with control policy generating apparatus 443 with communicator 442, and control policy 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 the first energy-storage units 200 and the second energy-storage units 300 from the sensor be connected to bus and the state parameter of acquisition is sent to computer device 441.Computer device 441 calculates the dump energy of the first energy-storage units 200 and the second energy-storage units 300 according to above-mentioned state parameter and the result calculated is delivered to control policy generating apparatus 443.The mode that relevant calculation device 441 calculates dump energy will be further described below.
Control policy generating apparatus 443 is cores of controller 440, order accordingly for generating according to the dump energy of the first energy-storage units 200 and the second energy-storage units 300 and export the control end T7 of commutation circuit 450 to, realizing coupled condition recited above a)-g to make the commutation circuit 450 in Fig. 2) in one or more.
The concrete mode that control policy generating apparatus 443 generates order is below described.
The difference of the aviation value of dump energy within this period of the aviation value of the dump energy first investigating the first energy-storage units 200 within a period of time and the second energy-storage units 300 whether be positioned at a default scope (if such as residual circuit characterizes with SOC, then scope can be represented as ± 2%).If the difference of above-mentioned aviation value drops in default scope, then can adopt the strategy that following table 1 represents:
Table 1
When the difference of above-mentioned aviation value drops on outside default scope, then order accordingly according to the strategy generating of lower list 2.Also namely, if the difference of this aviation value is greater than the upper limit (being such as greater than 2%) of default scope, then make solar battery cell 100 and the first energy-storage units 200 charge to the second energy-storage units 300 simultaneously; If this aviation value is less than the lower limit (being such as less than-2%) of default scope, then make solar battery cell 100 and the second energy-storage units 300 charge to the first energy-storage units 200 simultaneously.
Table 2
Below describe the mode that computer device 441 calculates dump energy, in this mode, suppose that the first energy-storage units 200 and the second 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 contriver, 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.
Contriver finds through research, and after automobile remains static and exceedes a period of time, the inner structure of storage battery is generally more stable; Contriver 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 state or storage battery is more than or equal to above-mentioned current value, contriver 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.Contriver finds through research, and following formula (2) can reflect the impact of temperature on the SOC calculated according to Current integrating method preferably:
Wherein △ 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; computer device 441 and control policy 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 domain of claims after the present invention.
The inner 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 mouth of solar cell.In the present embodiment, the commutation circuit 450 that will be sent in shown in Fig. 2 of the horsepower output of optimization output power circuit 120.
In the diagram, optimization output power circuit 120 realizes the optimization of the horsepower 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 operation 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 horsepower 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 horsepower output and the horsepower 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 operation 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 horsepower output of the solar battery cell 100 of the present embodiment, when illumination deficiency, even can improve 130%.
Fig. 6 is the diagram of circuit 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 the first energy-storage units 200 and the second energy-storage units 300 is obtained.This step can obtain by the sensor be arranged near these energy-storage units.
Then, in step 620, the dump energy of the first energy-storage units and the second 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, calculate according to step 620 aviation value of residual circuit within a period of time (such as 1 month or 1 week) that dump energy and previous historic records thereof calculate the first and second energy-storage units 200 and 300.
Then, in step 640, judge the difference of the aviation value of dump energy within this period of the aviation value of the dump energy of the first energy-storage units 200 within a period of time and the second energy-storage units 300 whether be positioned at a default scope (if such as residual circuit characterizes with SOC, then scope can be represented as ± 2%).If the difference of above-mentioned aviation value drops in default scope, then enter step 650, otherwise enter step 660.
In step 650, according to the dump energy of the first and second energy-storage units 200 and 300, above-mentioned table 1 is utilized to select corresponding strategy.And in step 660, according to the dump energy of the first and second energy-storage units 200 and 300, utilize above-mentioned table 2 to select corresponding strategy.
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 sheets, 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 (12)
1. based on an automobile power supply system for double-energy storage unit, it is characterized in that, comprising:
Solar battery cell;
First energy-storage units;
Second energy-storage units; And
PMU, it is connected with described solar battery cell, described first energy-storage units, described second energy-storage units and electric load used for vehicles,
Wherein, described PMU, according to the dump energy of described first energy-storage units and described second energy-storage units, is consistent with the degree of the degradation making described first and second energy-storage units substantially at described first energy-storage units, the energy distributed between described second energy-storage units and described electric load used for vehicles from described solar battery cell.
2. automobile power supply system as claimed in claim 1, wherein, described first energy-storage units and described second energy-storage units have identical electric parameter.
3. automobile power supply system as claimed in claim 2, wherein, described PMU comprises:
The the first adaptive charging circuit be connected with described first energy-storage units, for being the charging valtage being suitable for described first energy-storage units by the voltage transitions of input;
The the second adaptive charging circuit be connected with described second energy-storage units, for being the charging valtage being suitable for described second 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 operating mode under the control of the controller:
A) described solar battery cell is connected to charge to described first energy-storage units with described first adaptive charging circuit; B) described solar cell is connected to charge to described second 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 first adaptive charging circuit is connected described first energy-storage units is charged to described second energy-storage units with described second adaptive charging circuit; E) described second adaptive charging circuit is connected described second energy-storage units is charged to described first energy-storage units with described first adaptive charging circuit; F) described first adaptive charging circuit is connected with described voltage conversion circuit described first energy-storage units is powered to described electric load used for vehicles; And g) described second adaptive charging circuit is connected with described voltage conversion circuit to make described second energy-storage units power to described electric load used for vehicles.
4. automobile power supply system as claimed in claim 3, wherein, described controller comprises:
Computer device, for calculating the dump energy of described first energy-storage units and described second energy-storage units;
The communicator be connected with described computer device, for obtaining the state parameter of the first energy-storage units and described second energy-storage units and these state parameters being sent to described computer device; And
Control policy generating apparatus, its generation is used for realizing described operating mode a)-g) in one or more order.
5. automobile power supply system as claimed in claim 4, wherein, described control policy generating apparatus generates order according to following manner:
If the difference of the aviation value of dump energy within this period of the aviation value of the dump energy of described first energy-storage units within a period of time and described second energy-storage units is positioned at a default scope, then:
If the dump energy of described first and second energy-storage units is all more than or equal to default threshold value, then generates and make described commutation circuit realize described operating mode c), order f) and g);
If the dump energy that the dump energy of described first energy-storage units is more than or equal to described threshold value and described second energy-storage units is less than described threshold value, then generates and make described commutation circuit realize described operating mode b) and order f);
If the dump energy that the dump energy of described first energy-storage units is less than described threshold value and described second energy-storage units is more than or equal to described threshold value, then generates and make described commutation circuit realize order a) and g) of described operating mode;
If the dump energy of described first and second energy-storage units is all less than described threshold value, then generates and make described commutation circuit realize order a) and b) of described operating mode.
6. automobile power supply system as claimed in claim 5, wherein, described control policy generating apparatus generates order according to following manner:
If the difference of the aviation value of dump energy within this period of the aviation value of the dump energy of described first energy-storage units within a period of time and described second energy-storage units exceeds the upper limit of described default scope, then generate and make described commutation circuit realize described operating mode b) and order d);
If the difference of the aviation value of dump energy within this period of the aviation value of the dump energy of described first energy-storage units within a period of time and described second energy-storage units is less than the lower limit of described default scope, then generates and make described commutation circuit realize order a) and e) of described operating mode.
7. automobile power supply system as claimed in claim 4, wherein, described first energy-storage units and the second energy-storage units are storage battery, and described dump energy characterizes with the SOC of described storage battery, and described computer device 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 state 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.
8. based on an automobile method for controlling power supply for double-energy storage unit, it is characterized in that, the electric power system of described automobile comprises solar battery cell, the first energy-storage units and the second energy-storage units, and described method comprises the following steps:
Obtain the state parameter of described first energy-storage units and described second energy-storage units;
The dump energy of described first energy-storage units and described second energy-storage units is calculated according to the state parameter obtained; And
According to the dump energy of described first energy-storage units and described second energy-storage units, be substantially consistent with the degree of the degradation making described first and second energy-storage units at described first energy-storage units, the energy distributed between described second energy-storage units and described electric load used for vehicles from described solar battery cell.
9. automobile method for controlling power supply as claimed in claim 8, wherein, described first energy-storage units and described second energy-storage units have identical electric parameter.
10. automobile method for controlling power supply as claimed in claim 9, wherein, according to following manner at described first energy-storage units, distribute energy from described solar battery cell between described second energy-storage units and described electric load used for vehicles:
If the difference of the aviation value of dump energy within this period of the aviation value of the dump energy of described first energy-storage units within a period of time and described second energy-storage units is positioned at a default scope, then:
If the dump energy of described first and second energy-storage units is all more than or equal to default threshold value, then described solar battery cell, described first energy-storage units and described second energy-storage units is made to power to described electric load used for vehicles;
If the dump energy of described first energy-storage units is more than or equal to described threshold value and the dump energy of described second energy-storage units is less than described threshold value, then described solar battery cell and described first energy-storage units is made to power to described electric load used for vehicles;
If the dump energy of described first energy-storage units is less than described threshold value and the dump energy of described second energy-storage units is more than or equal to described threshold value, then described solar battery cell and described second energy-storage units is made to power to described electric load used for vehicles;
If the dump energy of described first and second energy-storage units is all less than described threshold value, then described solar battery cell is made to power to described first and second energy-storage units.
11. automobile method for controlling power supply as claimed in claim 10, wherein, according to following manner at described first energy-storage units, distribute energy from described solar battery cell between described second energy-storage units and described electric load used for vehicles: if the difference of the aviation value of dump energy within this period of the aviation value of the dump energy of described first energy-storage units within a period of time and described second energy-storage units exceeds the upper limit of described default scope, then make described solar battery cell and described first energy-storage units to described second energy-storage units charging;
If the difference of the aviation value of dump energy within this period of the aviation value of the dump energy of described first energy-storage units within a period of time and described second energy-storage units is less than the lower limit of described default scope, then make described solar battery cell and described second energy-storage units to described first energy-storage units charging.
12. automobile method for controlling power supply as claimed in claim 9, wherein, described first energy-storage units and the second energy-storage units are storage battery, and described dump energy characterizes with the SOC of described storage battery, and described computer device 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 state 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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| WO2018039824A1 (en) * | 2016-08-28 | 2018-03-08 | 刘建林 | Energy dynamic storage method and system for solar cell panel |
| CN108569143A (en) * | 2017-03-14 | 2018-09-25 | 常州星宇车灯股份有限公司 | A kind of double photo-voltaic power supply power supply systems of automobile LED indoor lamp and method |
| CN110745001A (en) * | 2018-07-24 | 2020-02-04 | 比亚迪股份有限公司 | Energy distribution device and vehicle |
| CN109193902A (en) * | 2018-10-17 | 2019-01-11 | 威马智慧出行科技（上海）有限公司 | A kind of vehicle electric power supply control system |
| CN115117996B (en) * | 2022-08-23 | 2023-01-17 | 如果新能源科技(江苏)股份有限公司 | Charging controller, control method of charging controller, and vehicle |
| WO2024050656A1 (en) * | 2022-09-05 | 2024-03-14 | 航霈科技(深圳)有限公司 | Power supply apparatus, method and system |
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