CN117375166A - Charging method and system of solar battery pack and readable storage medium - Google Patents
Charging method and system of solar battery pack and readable storage medium Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with provisions for charging different types of batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/0071—Regulation of charging or discharging current or voltage with a programmable schedule
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to the field of energy conversion. The invention discloses a charging method, a charging system and a readable storage medium of a solar battery pack, wherein the method comprises the following steps: through determining to-be-charged battery and rechargeable battery, according to-be-charged battery and rechargeable battery's electric quantity difference and distance determine to-be-charged battery corresponding optimal rechargeable battery, select optimal rechargeable battery to charge to-be-charged battery for when solar cell group carries out photovoltaic charging, the slower battery of charging efficiency can be charged by the faster battery of charging efficiency simultaneously, can make whole solar cell group more quick full charge, improves solar cell group's charging efficiency.
Description
Technical Field
The present invention relates to the field of energy conversion technologies, and in particular, to a method and a system for charging a solar battery, and a readable storage medium.
Background
Solar cells have become one of the important technologies in the renewable energy field at present, and with the continuous development and maturation of solar cell technologies, more and more types and forms of solar cells have appeared on the market.
When the solar battery pack is subjected to photovoltaic charging, the battery capacity and the service condition of each battery in the battery pack are different, so that when part of the batteries are close to or in a full-load state, part of the batteries are still not fully charged, the charging time is increased, and the charging efficiency is reduced.
Disclosure of Invention
The application provides a charging method, a charging system and a readable storage medium of a solar battery pack, which are used for determining an optimal charging battery corresponding to the battery to be charged according to the difference value and the distance between the battery to be charged and the battery to be charged by determining the battery to be charged and the distance between the battery to be charged and the battery to be charged, so that when the solar battery pack is subjected to photovoltaic charging, a battery with slower charging efficiency can be charged by a battery with faster charging efficiency at the same time, the whole solar battery pack can be charged fully more quickly, and the charging efficiency of the solar battery pack is improved.
In a first aspect, the present application provides a method for charging a solar cell stack, the method comprising: determining the real-time electric quantity of each battery in the solar battery pack; if the electric quantity of the battery is lower than the preset minimum electric quantity threshold value, the battery is truly the battery to be charged; if the electric quantity of the battery is not lower than a preset maximum electric quantity threshold value, determining that the battery is a rechargeable battery; acquiring the distance between the battery to be charged and the rechargeable battery; calculating an electric quantity difference value between the battery to be charged and the rechargeable battery; determining an optimal rechargeable battery of the battery to be charged according to the electric quantity difference value and the distance; and selecting the optimal rechargeable battery to charge the battery to be charged.
Through adopting above-mentioned technical scheme, through confirming to wait rechargeable battery and rechargeable battery, according to waiting the battery and the electric quantity difference and the distance of rechargeable battery confirm the optimal rechargeable battery that wait to charge the battery corresponds, select optimal rechargeable battery to wait to charge the battery for when solar cell group carries out photovoltaic charging, the battery that charge efficiency is slower can be charged by the battery that charge efficiency is faster simultaneously, can make whole solar cell group more quick full charge, improves solar cell group's charge efficiency.
With reference to the embodiments of the first aspect, in some embodiments, the step of selecting the optimal rechargeable battery to charge the battery to be charged specifically includes: when two or more than two current optimal rechargeable batteries corresponding to the current rechargeable batteries are the same battery, the current optimal rechargeable batteries are selected to charge the current rechargeable batteries at the same time, the current rechargeable batteries are any one of the rechargeable batteries, and the current optimal rechargeable batteries are any one of the rechargeable batteries.
By adopting the technical scheme, when the optimal rechargeable batteries corresponding to the rechargeable batteries are the same battery, the optimal rechargeable batteries can charge the rechargeable batteries at the same time, so that the charging rate of the rechargeable batteries can be increased, the loss of the rechargeable batteries in charging is reduced, the charging efficiency is improved, the system can be recovered to a full-load state more quickly, and longer-time power supply is provided.
With reference to the embodiments of the first aspect, in some embodiments, the step of selecting the optimal rechargeable battery to charge the battery to be charged specifically includes: when only one optimal rechargeable battery exists in the first to-be-charged battery, the first optimal rechargeable battery is selected to charge the first to-be-charged battery.
Through adopting above-mentioned technical scheme, when a battery that waits to charge only corresponds an optimal rechargeable battery, use this optimal rechargeable battery to wait to charge the battery, can make wait to charge the battery by photovoltaic charging and optimal rechargeable battery charge simultaneously, improved the efficiency of charging to can reduce the loss when charging by optimal rechargeable battery charge, improve battery life.
With reference to the embodiments of the first aspect, in some embodiments, the step of selecting the optimal rechargeable battery to charge the battery to be charged specifically includes: when the second to-be-charged battery corresponds to two or more than two second optimal charging batteries at the same time, acquiring solar energy conversion efficiency data, battery effective area data and solar radiation intensity data of the second optimal charging batteries; calculating solar charge rate data of the second optimal rechargeable battery according to the solar energy conversion efficiency data, the battery effective area data and the solar radiation intensity data; and selecting the second optimal rechargeable battery with the maximum solar charging rate data to charge the second battery to be charged.
Through adopting above-mentioned technical scheme, when waiting to charge battery and corresponding a plurality of optimal rechargeable battery, through determining the solar charging rate of optimal rechargeable battery, select the biggest optimal rechargeable battery of solar charging rate data to wait to charge the battery, let the fastest optimal rechargeable battery of solar charging rate wait to charge the battery and charge can reduce the influence of discharging to optimal rechargeable battery electric quantity for whole group battery can be fully charged more soon, charging efficiency has been improved.
With reference to some embodiments of the first aspect, in some embodiments, the step of determining an optimal rechargeable battery according to the charge difference value and the distance specifically includes: when the third to-be-charged battery corresponds to two or more than two third optimal charging batteries at the same time, acquiring the resistance of the third to-be-charged battery, the resistance of the third optimal charging battery and the temperature of the third to-be-charged battery; calculating the battery loss between the third standby battery and the third optimal rechargeable battery according to the battery loss calculation model; and selecting the third optimal rechargeable battery with the minimum battery loss to charge the third rechargeable battery.
By adopting the technical scheme, when the battery to be charged corresponds to a plurality of optimal rechargeable batteries at the same time, the battery loss between the optimal rechargeable battery and the battery to be charged is calculated, and the optimal rechargeable battery with the minimum battery loss is selected to charge the battery to be charged, so that the loss of charging and discharging can be reduced, and the battery life of the battery pack is prolonged.
With reference to some embodiments of the first aspect, in some embodiments, the battery loss calculation model is:
wherein N is battery loss, R 1 R is the resistance of the battery to be charged 2 D is the distance data between the optimal rechargeable battery and the battery to be charged, T is the temperature value of the battery to be charged, E 1 For the optimal charge value of the rechargeable battery E 2 Is the electric quantity value of the battery to be charged.
By adopting the technical scheme, the battery loss between the battery to be charged and the rechargeable battery can be accurately calculated through the battery loss calculation model.
With reference to the embodiments of the first aspect, in some embodiments, the step of selecting the optimal rechargeable battery to charge the battery to be charged specifically includes: when the fourth optimal rechargeable batteries corresponding to the two or more fourth rechargeable batteries are the same battery, the fourth optimal rechargeable battery is selected to charge any one of the fourth rechargeable batteries, the fourth rechargeable battery is any one of the fourth rechargeable batteries, and the fourth optimal rechargeable battery is any one of the fourth rechargeable batteries.
Through adopting above-mentioned technical scheme, when a plurality of rechargeable batteries correspond an optimal rechargeable battery, select this optimal rechargeable battery to charge for arbitrary rechargeable battery, remaining rechargeable battery that waits reselects other rechargeable batteries as optimal rechargeable battery, can make the discharge rate control of this optimal rechargeable battery in less within range for whole group battery is more stable.
In a second aspect, embodiments of the present application provide a charging system for a solar battery, the charging system including: the system comprises a first determining module, a second determining module, a third determining module, an acquisition module, a calculation module and a fourth determining module.
The first determining module is used for determining the real-time electric quantity of each battery in the solar battery pack;
the second determining module is used for determining that the battery is a battery to be charged if the electric quantity of the battery is lower than a preset minimum electric quantity threshold value;
and the third determining module is used for determining that the battery is a rechargeable battery if the electric quantity of the battery is not lower than a preset maximum electric quantity threshold value.
The acquisition module acquires the distance between the battery to be charged and the rechargeable battery;
the calculation module is used for calculating the electric quantity difference value between the battery to be charged and the rechargeable battery;
A fourth determining module for determining an optimal rechargeable battery of the battery to be charged according to the electric quantity difference value and the distance;
and the selection module is used for selecting the optimal rechargeable battery to charge the battery to be charged.
In a third aspect, embodiments of the present application provide a charging system for a solar battery, the system including: one or more processors and memory; the memory is coupled to the one or more processors, the memory for storing computer program code comprising computer instructions that the one or more processors call to cause the system to perform the method as described in the first aspect and any possible implementation of the first aspect.
In a fourth aspect, embodiments of the present application provide a charging system readable storage medium for a solar battery, comprising instructions that, when executed on a system, cause the system to perform a method as described in the first aspect and any possible implementation manner of the first aspect.
One or more technical solutions provided in the embodiments of the present application at least have the following technical effects or advantages:
1. according to the method and the device, the battery to be charged and the rechargeable battery are determined, the optimal rechargeable battery corresponding to the battery to be charged is determined according to the electric quantity difference value and the distance between the battery to be charged and the rechargeable battery, and the optimal rechargeable battery is selected to charge the battery to be charged, so that when the solar battery pack is subjected to photovoltaic charging, the battery with slower charging efficiency can be charged by the battery with faster charging efficiency, the whole solar battery pack can be charged more rapidly, and the charging efficiency of the solar battery pack is improved.
2. According to the method and the device, when the battery to be charged corresponds to the plurality of optimal rechargeable batteries, the optimal rechargeable battery with the largest solar charging rate data is selected to charge the battery to be charged by determining the solar charging rate of the optimal rechargeable battery, so that the optimal rechargeable battery with the fastest solar charging rate can charge the battery to be charged, the influence of discharging on the electric quantity of the optimal rechargeable battery can be reduced, the whole battery pack can be charged more rapidly, and the charging efficiency is improved.
3. According to the method and the device, when the battery to be charged corresponds to the plurality of optimal rechargeable batteries, the battery loss between the optimal rechargeable batteries and the battery to be charged is calculated, the optimal rechargeable battery with the minimum battery loss is selected to charge the battery to be charged, the loss of charging and discharging can be reduced, and the battery life of the battery pack is prolonged.
Drawings
Fig. 1 is a schematic flow chart of a charging method of a solar battery pack according to an embodiment of the present application.
Fig. 2 is another flow chart of a charging method of a solar battery pack according to an embodiment of the present application.
Fig. 3 is a schematic functional block diagram of a charging system of a solar battery pack according to an embodiment of the present application.
Fig. 4 is a schematic diagram of a physical device of a charging system of a solar battery pack according to an embodiment of the present application.
Detailed Description
The terminology used in the following embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates to the contrary. It should also be understood that the term "and/or" as used in this application refers to and encompasses any or all possible combinations of one or more of the listed items.
The terms "first," "second," and the like, are used below for descriptive purposes only and are not to be construed as implying or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature, and in the description of embodiments of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
Fig. 1 is a schematic flow chart of a charging method of a solar battery pack according to an embodiment of the present application.
S101, determining the real-time electric quantity of each battery in the solar battery pack.
A solar cell set usually comprises two or more than two cells, in general, the solar cell set is usually composed of a plurality of solar cells with the same model, so that the performance and the characteristics of the cells are consistent, the situation that the models of the cells are inconsistent can also occur under special conditions, in order to meet different requirements, the solar cell sets with different models, such as solar cell sets used in regions with polar regions, high temperatures, low temperatures or high altitudes, can be selected for combined use, and due to different geographic positions, such as different orientations, of the solar cell sets, the shielding situation of each position is different, so that the solar radiation intensity received by the solar device is different, and finally, the real-time electric quantity of each cell in the solar cell set is different. By measuring the voltage and current of each battery, the real-time charge of each battery is calculated, the voltage and current signals are converted into digital signals using an analog converter, and then the digital signals are processed using a microcontroller or battery management chip and the real-time charge of each battery is calculated.
S102, if the electric quantity of the battery is lower than a preset minimum electric quantity threshold value, the battery is really a battery to be charged.
When the electric quantity of a certain battery is lower than a preset minimum electric quantity threshold value, the battery is determined to be a battery to be charged, other batteries are required to charge the battery besides photovoltaic charging, the charging efficiency is accelerated, when the electric quantity of the battery is reduced to a certain degree, charging measures are timely taken to ensure that the battery always maintains enough electric quantity, so that the reliability and the service life of the battery are improved, and stable power supply can be provided when the battery is required. The preset minimum power threshold is determined by actually testing the performance of the battery under different power, for example, the preset minimum power threshold may be 20%, which is not limited herein.
And S103, if the electric quantity of the battery is not lower than a preset maximum electric quantity threshold value, determining that the battery is a rechargeable battery.
When the electric quantity of a certain battery is not lower than a preset maximum electric quantity threshold value, the battery is determined to be a rechargeable battery, other batteries with lower electric quantity can be charged besides photovoltaic charging, and when the electric quantity of the battery is sufficient, the battery is used as the rechargeable battery to charge other batteries, so that the energy utilization efficiency is improved, the energy balance among the batteries is ensured, and the safety problem caused by overcharging of certain batteries is avoided. The preset maximum power threshold is determined by actually testing performance of the battery under different power, and the preset maximum power threshold is possibly 80%, which is not limited herein.
S104, acquiring the distance between the battery to be charged and the rechargeable battery.
The distance between the battery to be charged and the rechargeable battery refers to the distance between charging wires connecting the battery to be charged and the rechargeable battery during charging, the distance between the battery to be charged and the rechargeable battery is related to the arrangement mode of the batteries in the battery pack, the distance between the battery to be charged and the rechargeable battery influences the battery loss during charging of the battery to be charged and the rechargeable battery, if the distance is too large, the battery loss is too large, in the battery pack, the batteries are connected in series or in parallel through an electric connector, the voltage and the capacity of the batteries are combined to form an integral battery pack, and the distance between the charging wires connecting the battery to be charged and the rechargeable battery is obtained as the distance between the battery to be charged and the rechargeable battery.
S105, calculating the electric quantity difference value between the battery to be charged and the rechargeable battery.
And (3) calculating the electric quantity difference between the battery to be charged and the rechargeable battery according to the real-time electric quantity of each battery acquired in the step (S101).
And S106, determining the optimal rechargeable battery of the battery to be charged according to the electric quantity difference value and the distance.
Determining an optimal rechargeable battery of the battery to be charged according to a battery charging strategy, an electric quantity difference value and distance data, wherein the battery charging strategy is as follows: the calculated electric quantity difference is given to an electric quantity difference coefficient, and the obtained distance is given to a distance coefficient, for example, if the electric quantity difference coefficient is a, the electric quantity difference is a, the distance coefficient is B, the distance data is B, a+b=1, and the values of a, a and B are calculated and ordered, wherein when the values of a, a and B are the maximum, the corresponding battery to be charged is the optimal battery to be charged, the electric quantity difference coefficient a may be 0.5, and the distance coefficient B may be 0.5, which is not limited herein.
And S107, selecting the optimal rechargeable battery to charge the battery to be charged.
When the optimal rechargeable battery is selected to charge the battery to be charged, if the battery electric quantity of the battery to be charged is greater than or equal to the minimum electric quantity threshold value after a period of time, the charging of the battery to be charged is stopped.
In the above embodiment, the optimal rechargeable battery corresponding to the to-be-charged battery is determined according to the electric quantity difference value and the distance between the to-be-charged battery and the rechargeable battery, and the optimal rechargeable battery is selected to charge the to-be-charged battery, so that when the solar battery pack is subjected to photovoltaic charging, the battery with slower charging efficiency can be charged by the battery with faster charging efficiency at the same time, the whole solar battery pack can be charged fully more quickly, and the charging efficiency of the solar battery pack is improved.
The foregoing is a scheme for determining and charging an optimal rechargeable battery of a to-be-charged battery, and the following describes, with reference to fig. 2, a specific scheme for charging the to-be-charged battery in the scheme of the present application:
fig. 3 is a schematic flow chart of a charging method of a solar battery pack according to an embodiment of the present application, as shown in fig. 2.
And S201, determining the optimal rechargeable battery of the to-be-recharged battery according to the electric quantity difference value and the distance.
In S106, the optimal rechargeable battery of the to-be-recharged battery is determined according to the battery charging strategy, the power difference value and the distance data, and the step is similar to S106 and will not be repeated here.
S202, when two or more than two current optimal rechargeable batteries corresponding to the current rechargeable batteries are the same battery, selecting the current optimal rechargeable battery and simultaneously charging the current rechargeable battery.
When the optimal rechargeable battery of the battery to be charged is determined according to the battery charging strategy, the electric quantity difference value and the distance data, the types of partial batteries in the solar battery pack are the same and the service conditions are similar, so that the charging efficiency of partial batteries in the solar battery pack is similar, when the photovoltaic charging is carried out, the real-time electric quantity among the partial batteries is similar when the charging time of all the batteries is the same, and a plurality of other batteries closest to the battery are arranged around one battery in the battery pack, and when the two conditions occur simultaneously, the optimal rechargeable battery corresponding to the plurality of batteries to be charged is the same battery.
At this time, determining the number of the to-be-charged batteries corresponding to one optimal charging battery, if the number of the to-be-charged batteries corresponding to one optimal charging battery is smaller than the threshold value of the number of the to-be-charged batteries, selecting the optimal charging battery to charge all the to-be-charged batteries corresponding to the optimal charging battery at the same time, and ensuring that the optimal charging battery charges the corresponding to the to-be-charged batteries at the same time when the number of the to-be-charged batteries is lower; the number of the batteries to be charged is determined according to the charge-discharge curve and the battery performance in the solar battery pack, for example, the number of the batteries to be charged may be 4, which is not limited herein.
In the above embodiment, when the optimal rechargeable batteries corresponding to the plurality of rechargeable batteries are the same battery, the optimal rechargeable batteries are enabled to charge the plurality of rechargeable batteries at the same time, so that the charging rate of the rechargeable batteries can be increased, the loss in charging the rechargeable batteries is reduced, the charging efficiency is improved, the system can be restored to the full-load state more quickly, and longer-time power supply is provided.
And S203, when only one optimal rechargeable battery exists in the first to-be-charged battery, selecting the first optimal rechargeable battery to charge the first to-be-charged battery.
Along with the gradual increase of the charging time, the electric quantity of all batteries in the solar battery pack gradually increases, and the quantity of the batteries to be charged in the battery pack gradually decreases, so that the situation that one battery to be charged corresponds to one optimal charging battery can occur, and at the moment, the only optimal charging battery corresponding to the battery to be charged is selected to charge the battery to be charged.
In the above embodiment, when one to-be-charged battery corresponds to only one optimal charging battery, the optimal charging battery is used to charge the to-be-charged battery, so that the to-be-charged battery is charged by the photovoltaic and the optimal charging battery simultaneously, the charging efficiency is improved, the loss during charging can be reduced by charging the optimal charging battery, and the service life of the battery is prolonged.
S204, when the second to-be-charged battery corresponds to two or more than two second optimal rechargeable batteries at the same time, acquiring solar energy conversion efficiency data, battery effective area data and solar radiation intensity data of the second optimal rechargeable batteries.
It can be understood from the above that, as the charging time increases gradually, the electric quantity of all the batteries in the solar battery pack increases gradually, the number of the to-be-charged batteries in the battery pack decreases gradually, and there is a case that one to-be-charged battery corresponds to a plurality of optimal charging batteries. The solar energy charging method comprises the steps of obtaining solar energy conversion efficiency data, battery effective area data and solar radiation intensity data of a plurality of optimal rechargeable batteries corresponding to the to-be-charged battery, and calculating solar energy charging rates of all the optimal rechargeable batteries corresponding to the to-be-charged battery.
S205, calculating solar charging rate data of the second optimal rechargeable battery according to the solar energy conversion efficiency data, the battery effective area data and the solar radiation intensity data.
The solar energy conversion efficiency data represents the efficiency of the solar cell for converting solar radiation energy into usable electric energy, and the higher the solar energy conversion efficiency is determined in the manufacturing process of the solar cell, the more effectively the solar cell can convert sunlight into electric energy, so as to provide higher cell output power; the effective cell area refers to the effective collection area of the solar cell, also known as the area of the solar panel, representing the area of the solar panel that can receive solar radiation energy; the solar energy conversion efficiency data and the effective area of the battery can be obtained from a database in the solar battery pack; solar radiation intensity refers to the energy per unit area of solar radiation energy measured by solar radiation measuring instruments in a solar cell stack.
The solar charge rate data is obtained by multiplying solar conversion efficiency data, battery effective area data and solar radiation intensity data.
For example, assuming that the solar energy conversion efficiency of a certain optimal rechargeable battery is 20%, the effective area data of the battery is 0.1 square meter, the solar radiation intensity is 1000 watts/square meter, and the solar energy charging rate is calculated to be 0.2×0.1×1000=20 watts.
S206, selecting the second optimal rechargeable battery with the largest solar charging rate data to charge the second rechargeable battery.
When the solar charge rate data is larger, the charging speed of the optimal rechargeable battery is higher, and the battery power is increased faster. Since an increase in solar charge rate data means that more solar energy is converted into electric energy and charged into the optimal rechargeable battery at a faster rate, the optimal rechargeable battery can obtain charge faster and the amount of electric power increases more rapidly as the solar charge rate data increases. The effect of discharging on the amount of electricity of the optimal rechargeable battery can be reduced when the solar charge rate data of the optimal rechargeable battery is larger, because the increase of the solar charge rate data means that the optimal rechargeable battery can acquire more electric energy faster during photovoltaic charging, and therefore the rate of electricity reduction of the optimal rechargeable battery is relatively slower even during discharging. In this case, the decrease in the amount of electricity of the optimal rechargeable battery is offset by the increase in the solar charge rate data, thereby reducing the influence of discharge on the amount of electricity of the optimal rechargeable battery.
In the above embodiment, when the battery to be charged corresponds to the plurality of optimal rechargeable batteries, the optimal rechargeable battery with the largest solar charging rate data is selected to charge the battery to be charged by determining the solar charging rate of the optimal rechargeable battery, so that the optimal rechargeable battery with the fastest solar charging rate charges the battery to be charged, the influence of discharging on the electric quantity of the optimal rechargeable battery can be reduced, the whole battery pack can be charged more rapidly, and the charging efficiency is improved.
S207, when the third to-be-charged battery corresponds to two or more than two third optimal charging batteries at the same time, acquiring the resistance of the third to-be-charged battery, the resistance of the third optimal charging battery and the temperature of the third to-be-charged battery.
The resistance of the battery to be charged, the resistance of the optimal rechargeable battery and the temperature of the battery to be charged all affect the loss generated when the battery to be charged and the optimal rechargeable battery are charged. Since a high resistance results in more heat being generated when current passes through the resistance, the higher the resistance of the battery, the greater the loss generated upon charging. The temperature of the battery to be charged also affects the loss during charging, and the higher temperature increases the resistance inside the battery, so that more energy is converted into heat instead of being stored; since current passes through the wire or other medium in the energy transmission process, and energy is converted into heat in the process, the increase of the distance data between the optimal rechargeable battery and the battery to be charged also causes the increase of the battery loss, and the increase of the distance data causes the increase of the energy transmission loss in the charging process, so when the distance between the optimal rechargeable battery and the battery to be charged is increased, the battery loss is also increased.
And S208, calculating the battery loss between the third standby battery and the third optimal rechargeable battery according to the battery loss calculation model.
The battery loss calculation model is as follows:
wherein N is battery loss, R 1 R is the resistance of the battery to be charged 2 The resistance value of the optimal rechargeable battery, d isDistance data between the optimal rechargeable battery and the battery to be charged, T is the temperature value of the battery to be charged, E 1 For the optimal charge value of the rechargeable battery E 2 Is the electric quantity value of the battery to be charged.
An example calculation is: when the resistance value of the battery to be charged is 15 ohms, the resistance value of the optimal rechargeable battery is 4 ohms, the distance data between the optimal rechargeable battery and the battery to be charged is 30 meters, the temperature value of the battery to be charged is 30 ℃, the electric quantity value of the optimal rechargeable battery is 83%, the electric quantity value of the battery to be charged is 19%, the final battery loss value is 15.135 joules, and it can be understood that the parameters are simplified and approximately calculated in the formula for roughly knowing the magnitude of the battery loss value.
In the above embodiment, by adopting the above technical solution, the battery loss between the battery to be charged and the rechargeable battery can be accurately calculated by the battery loss calculation model.
And S209, selecting the third optimal rechargeable battery with the minimum battery loss to charge the third rechargeable battery.
In the above embodiment, when the battery to be charged corresponds to a plurality of optimal rechargeable batteries at the same time, the battery loss between the optimal rechargeable battery and the battery to be charged is calculated, and the optimal rechargeable battery with the minimum battery loss is selected to charge the battery to be charged, so that the loss of charging and discharging can be reduced, and the battery life of the battery pack can be prolonged.
And S210, when the fourth optimal rechargeable batteries corresponding to the two or more fourth rechargeable batteries are the same battery, selecting the fourth optimal rechargeable battery to charge any fourth rechargeable battery.
It can be understood that in S202, when determining the optimal rechargeable battery of the battery to be charged according to the battery charging policy, the electric quantity difference value and the distance data, because the types of some batteries in the solar battery pack are the same and the service conditions are similar, the charging efficiency of some batteries in the solar battery pack is similar, when the charging time of all the batteries is the same during the photovoltaic charging, the real-time electric quantity between some batteries is similar, and because there are a plurality of other batteries closest to one battery around the arrangement mode of the batteries in the battery pack, when both the two situations occur simultaneously, there will be a plurality of optimal rechargeable batteries corresponding to the battery to be charged as the same battery.
If the number of the to-be-charged batteries corresponding to one optimal charging battery is greater than or equal to the threshold value of the number of the to-be-charged batteries, any to-be-charged battery is selected, so that the optimal charging battery charges the to-be-charged battery, the point discharging speed of the optimal charging battery can be controlled within a certain range, and the situation that the discharging speed of the optimal charging battery is too high if the to-be-charged batteries are charged simultaneously due to the fact that the number of the to-be-charged batteries is too large is avoided.
In the above embodiment, when a plurality of to-be-charged batteries correspond to one optimal charging battery, the optimal charging battery is selected to charge any to-be-charged battery, and the remaining to-be-charged batteries reselect other charging batteries as the optimal charging battery, so that the discharging speed of the optimal charging battery can be controlled within a smaller range, and the whole battery pack is more stable.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
The system in the embodiments of the present application is described from a modular point of view as follows:
referring to fig. 3, a schematic functional module structure of a charging system for a solar battery pack according to an embodiment of the present application is shown, where the charging system includes:
a first determining module 301 for determining a real-time power of each cell in the solar cell set;
the second determining module 302 determines that the battery is a battery to be charged if the battery power is lower than a preset minimum power threshold;
the third determining module 303 determines that the battery is a rechargeable battery if the power of the battery is not lower than a preset maximum power threshold.
An acquisition module 304 for acquiring a distance between the battery to be charged and the rechargeable battery;
a calculating module 305, configured to calculate a difference in electric quantity between the battery to be charged and the rechargeable battery;
a fourth determining module 306 for determining an optimal rechargeable battery of the to-be-charged battery according to the power difference and the distance;
the selection module 307 selects the optimal rechargeable battery to charge the battery to be charged.
The system in the embodiment of the present application is described above from the point of view of the modularized functional entity, and the system in the embodiment of the present application is described below from the point of view of hardware processing, please refer to fig. 4, which is a schematic diagram of the physical device structure of the charging system of the solar battery pack provided in the embodiment of the present application.
It should be noted that the structure of the system shown in fig. 4 is only an example, and should not impose any limitation on the functions and the application scope of the embodiments of the present invention.
As shown in fig. 4, the system includes a central processing unit (Central Processing Unit, CPU) 401 which can perform various appropriate actions and processes, such as performing the method described in the above embodiment, according to a program stored in a Read-Only Memory (ROM) 402 or a program loaded from a storage section 408 into a random access Memory (Random Access Memory, RAM) 403. In the RAM 403, various programs and data required for the system operation are also stored. The CPU 401, ROM402, and RAM 403 are connected to each other by a bus 404. An Input/Output (I/O) interface 405 is also connected to bus 404.
The following components are connected to the I/O interface 405: an input section 406 including a camera, an infrared sensor, and the like; an output portion 407 including a liquid crystal display (Liquid Crystal Display, LCD), a speaker, and the like; a storage section 408 including a hard disk or the like; and a communication section 409 including a network interface card such as a LAN (Local Area Network ) card, a modem, or the like. The communication section 409 performs communication processing via a network such as the internet. The drive 410 is also connected to the I/O interface 405 as needed. A removable medium 411 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is installed on the drive 410 as needed, so that a computer program read therefrom is installed into the storage section 408 as needed.
In particular, according to embodiments of the present invention, the processes described above with reference to flowcharts may be implemented as computer software programs. For example, embodiments of the present invention include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising a computer program for performing the method shown in the flowchart. In such an embodiment, the computer program may be downloaded and installed from a network via the communication portion 409 and/or installed from the removable medium 411. When executed by a Central Processing Unit (CPU) 401, the computer program performs various functions defined in the present invention.
It should be noted that, the charging system readable medium of the solar battery pack according to the embodiment of the present invention may be a system readable signal medium or a system readable storage medium or any combination of the two. The system readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples of a system readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-Only Memory (ROM), an erasable programmable read-Only Memory (Erasable Programmable Read Only Memory, EPROM), flash Memory, an optical fiber, a portable compact disc read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In the present invention, however, the system-readable signal medium may comprise a data signal propagated in baseband or as part of a carrier wave, with a system-readable computer program embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. Where each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams or flowchart illustration, and combinations of blocks in the block diagrams or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Specifically, the system of the present embodiment includes a processor and a memory, where the memory stores a computer program, and when the computer program is executed by the processor, the charging method provided in the foregoing embodiment is implemented.
As another aspect, the present invention also provides a system-readable storage medium, which may be included in the system described in the above embodiment; or may exist alone without being assembled into the system. The storage medium carries one or more computer programs which, when executed by a processor of the system, cause the system to implement the methods provided in the embodiments described above.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
As used in the above embodiments, the term "when …" may be interpreted to mean "if …" or "after …" or "in response to determination …" or "in response to detection …" depending on the context. Similarly, the phrase "at the time of determination …" or "if detected (a stated condition or event)" may be interpreted to mean "if determined …" or "in response to determination …" or "at the time of detection (a stated condition or event)" or "in response to detection (a stated condition or event)" depending on the context.
In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces, in whole or in part, a flow or function consistent with embodiments of the present application. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in or transmitted from one system-readable storage medium to another system-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line), or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid state disk), etc.
Those of ordinary skill in the art will appreciate that implementing all or part of the above-described method embodiments may be accomplished by a computer program to instruct related hardware, the program may be stored in a computer readable storage medium, and the program may include the above-described method embodiments when executed. And the aforementioned storage medium includes: ROM or random access memory RAM, magnetic or optical disk, etc.
Claims (10)
1. A method for charging a solar cell set, applied to a charging system of the solar cell set, the method comprising:
determining the real-time electric quantity of each battery in the solar battery pack;
if the electric quantity of the battery is lower than a preset minimum electric quantity threshold value, the battery is truly the battery to be charged;
if the electric quantity of the battery is not lower than a preset maximum electric quantity threshold value, determining that the battery is a rechargeable battery;
acquiring the distance between the battery to be charged and the rechargeable battery;
calculating an electric quantity difference value between the battery to be charged and the rechargeable battery;
determining an optimal rechargeable battery of the battery to be charged according to the electric quantity difference value and the distance;
And selecting the optimal rechargeable battery to charge the battery to be charged.
2. The method according to claim 1, characterized in that said step of selecting the optimal rechargeable battery to charge the battery to be charged comprises in particular:
when two or more than two current optimal rechargeable batteries corresponding to the current rechargeable batteries are the same battery, the current optimal rechargeable batteries are selected to charge the current rechargeable batteries at the same time, the current rechargeable batteries are any one of the rechargeable batteries, and the current optimal rechargeable batteries are any one of the rechargeable batteries.
3. The method according to claim 1, characterized in that said step of selecting the optimal rechargeable battery to charge the battery to be charged comprises in particular:
when only one optimal rechargeable battery exists in the first to-be-charged batteries, the first to-be-charged battery is selected to charge the first to-be-charged battery, the first to-be-charged battery is any one of the to-be-charged batteries, and the first optimal rechargeable battery is any one of the rechargeable batteries.
4. The method according to claim 1, characterized in that said step of selecting the optimal rechargeable battery to charge the battery to be charged comprises in particular:
When the second battery to be charged corresponds to two or more second optimal charging batteries at the same time,
acquiring solar energy conversion efficiency data, battery effective area data and solar radiation intensity data of the second optimal rechargeable battery; calculating solar charge rate data of the second optimal rechargeable battery according to the solar conversion efficiency data, the battery effective area data and the solar radiation intensity data;
and selecting the second optimal rechargeable battery with the maximum solar charging rate data to charge the second rechargeable battery, wherein the second rechargeable battery is any two batteries of the rechargeable batteries, and the first optimal rechargeable battery is any one battery of the rechargeable batteries.
5. The method according to claim 1, characterized in that said step of selecting the optimal rechargeable battery to charge the battery to be charged comprises in particular:
when the third to-be-charged battery corresponds to two or more than two third optimal charging batteries at the same time, acquiring the resistance of the third to-be-charged battery, the resistance of the third optimal charging battery and the temperature of the third to-be-charged battery;
Calculating the battery loss between the third standby battery and the third optimal rechargeable battery according to a battery loss calculation model;
and selecting the third optimal rechargeable battery with the minimum battery loss to charge the third rechargeable battery, wherein the third rechargeable battery is any one of the rechargeable batteries, and the third optimal rechargeable battery is any one of the rechargeable batteries.
6. The method of claim 5, wherein the battery loss calculation model is:
wherein N is battery loss, R 1 R is the resistance value of the battery to be charged 2 D is the distance data between the optimal rechargeable battery and the battery to be charged, T is the temperature value of the battery to be charged, E 1 For the optimal charge value of the rechargeable battery, E 2 And the electric quantity value of the battery to be charged.
7. The method according to claim 1, characterized in that said step of selecting the optimal rechargeable battery to charge the battery to be charged comprises in particular:
when the fourth optimal rechargeable batteries corresponding to the two or more fourth rechargeable batteries are the same battery, selecting the fourth optimal rechargeable battery to charge any fourth rechargeable battery, wherein the fourth rechargeable battery is any battery among the rechargeable batteries, and the fourth optimal rechargeable battery is any battery among the optimal rechargeable batteries.
8. A charging system for a solar cell stack, the charging system comprising:
the first determining module is used for determining the real-time electric quantity of each battery in the solar battery pack;
the second determining module is used for determining that the battery is a battery to be charged if the electric quantity of the battery is lower than a preset minimum electric quantity threshold value;
a third determining module, configured to determine that the battery is a rechargeable battery if the electric quantity of the battery is not lower than a preset maximum electric quantity threshold; the acquisition module acquires the distance between the battery to be charged and the rechargeable battery;
the calculation module is used for calculating the electric quantity difference value between the battery to be charged and the rechargeable battery;
a fourth determining module for determining an optimal rechargeable battery of the battery to be charged according to the electric quantity difference value and the distance;
and the selection module is used for selecting the optimal rechargeable battery to charge the battery to be charged.
9. A charging system for a solar cell stack, comprising: one or more processors and memory;
the memory is coupled with the one or more processors, the memory for storing computer program code comprising computer instructions that the one or more processors invoke to cause the charging system to perform the method of any of claims 1-7.
10. A charging system readable storage medium for a solar cell stack, comprising instructions which, when run on a charging system, cause the charging system to perform the method of any one of claims 1-7.
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