CN116961184A - Method and device for automatically controlling capacitance and electric quantity balance of household energy storage system - Google Patents
Method and device for automatically controlling capacitance and electric quantity balance of household energy storage system Download PDFInfo
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- 238000004146 energy storage Methods 0.000 title claims abstract description 274
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000012546 transfer Methods 0.000 claims abstract description 43
- 238000004364 calculation method Methods 0.000 claims abstract description 42
- 238000007599 discharging Methods 0.000 claims abstract description 27
- 238000001514 detection method Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 7
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- 230000002708 enhancing effect Effects 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
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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
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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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
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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Abstract
The application provides a method and a device for automatically controlling capacitance and electric quantity balance of a household energy storage system, which are characterized in that an equalization mode is judged through energy data of a central energy storage battery and an edge energy storage battery, and a subsequent equalization adjustment process is started under the condition that equalization problems are found; judging a charging and discharging mode by the real-time charging and discharging flow, and respectively determining available free time for balancing aiming at a charging and discharging using state matching time calculation model, so as to select a balancing strategy with higher energy utilization rate; and finally, determining a transfer model according to the balance mode and the spare mode, controlling the transfer model to balance the capacitance and the electric quantity of the energy storage battery, adaptively finishing the balance of the capacitance and the electric quantity in the energy storage battery according to the actual use condition, and enhancing the performance of the energy storage battery in the household energy storage system, wherein the balance response is quick and the efficiency is high.
Description
Technical Field
The application relates to the technical field of intelligent Internet of things, in particular to a method and a device for automatically controlling capacitance and electric quantity balance of a household energy storage system.
Background
The household energy storage system stores redundant power generated by the solar panel or surplus power generated by the household electrical appliance in the battery pack, so that the household can conveniently take the power at any time, and the household power utilization system can ensure that the household power utilization keeps continuous and effective operation.
The household energy storage system mainly comprises an energy storage battery, energy conversion equipment, a power supply management unit, a communication interface and the like, wherein the energy storage battery and the energy conversion equipment are core components. At present, the energy storage battery in the household energy storage system mostly adopts a lithium primary battery, and the battery is damaged due to overcharge or overdischarge, so that the energy storage capacity and the service life of the energy storage battery are relatively limited. And the safety risk can be caused by the over-charge quantity, and meanwhile, the upper limit of the consumable electric quantity of the energy storage battery can not be increased, so that the power waste is caused.
Disclosure of Invention
The application aims to provide a method and a device for automatically controlling capacitance and electric quantity balance of a household energy storage system, which can automatically balance the capacitance and electric quantity of an energy storage battery in the household energy storage system and improve the performance of the energy storage battery.
The specific technical scheme of the application is as follows:
the application provides a method for automatically controlling capacitance and electric quantity balance of a household energy storage system, which comprises the following steps:
respectively acquiring energy data of a central energy storage battery and an edge energy storage battery, and judging an equalization mode of the energy storage battery according to the energy data;
acquiring the real-time charge and discharge flow of the energy storage battery, and judging the charge and discharge mode of the energy storage battery according to the real-time charge and discharge flow;
according to the charge-discharge mode matching time calculation model, judging a vacant mode of the energy storage battery according to the time calculation model;
and determining a transfer model according to the balance mode and the idle mode, and controlling the transfer model to balance the capacitance and the electric quantity of the energy storage battery.
Further, the energy data includes a cell voltage, and determining an equalization mode of the energy storage battery according to the energy data includes:
calculating a charging difference value between the cell voltage of the central energy storage battery and a preset cell voltage;
if the charging energy difference value is smaller than a charging energy preset range, calculating a cell voltage difference value of the central energy storage battery and the edge energy storage battery;
and determining an equalization mode of the energy storage battery according to the cell voltage difference value.
Further, the real-time charging and discharging flow includes a photovoltaic charging flow, a grid charging flow and a discharging flow, and the obtaining the real-time charging and discharging flow of the energy storage battery includes:
acquiring the photovoltaic charging flow of the photovoltaic end of the energy storage battery;
acquiring the grid charging flow of the energy storage battery grid end;
and obtaining the discharging flow of the output end of the energy storage battery.
Further, the determining the charge-discharge mode of the energy storage battery according to the real-time charge-discharge flow includes:
calculating a first influence capacitance according to the product of the photovoltaic charging flow and a preset time interval;
calculating a second influence capacitance according to the product of the charging flow of the power grid and a preset time interval;
calculating a third influence capacitance according to the product of the energy release flow and a preset time interval;
and judging the charge and discharge modes of the energy storage battery according to the relation between the sum of the first influence capacitance, the second influence capacitance and the third influence capacitance and a preset threshold value.
Further, determining the vacant mode of the energy storage battery according to the time calculation model includes:
acquiring rated capacitance, overheat loss and real-time voltage of the energy storage battery, inputting the rated capacitance, overheat loss and real-time voltage into the time calculation model, and outputting balance time;
determining a vacant mode of the energy storage battery according to the magnitude relation between the balance time and the first preset time;
the time calculation model is as follows: balance time = rated capacitance x overheat loss/real time voltage x time unit.
Further, determining the vacant mode of the energy storage battery according to the time calculation model includes:
acquiring rated capacitance and real-time voltage of the energy storage battery, inputting the rated capacitance and the real-time voltage into the time calculation model, and outputting balance time;
determining a vacant mode of the energy storage battery according to the magnitude relation between the balance time and the second preset time;
the time calculation model is as follows: balance time = rated capacitance/real-time voltage time unit.
Further, determining a transfer model from the equalization pattern and the free pattern includes:
when the balance mode or the idle mode is a common mode, acquiring the capacitance of the central energy storage battery and the capacitance of the edge energy storage battery and dividing the energy storage batteries into a high capacitance end and a low capacitance end;
setting the transfer direction of the transfer model as a high-capacitance end to a low-capacitance end in the energy storage battery.
Further, determining a transfer model from the equalization pattern and the free pattern includes:
when the balance mode and the spare mode are the severe mode, acquiring the capacitances of the central energy storage battery and the edge energy storage battery and dividing the energy storage batteries into a high capacitance end and a low capacitance end;
setting the transfer direction of the transfer model as follows: and in the energy charging stage, the photovoltaic end of the energy storage battery is connected with the low capacitance end in the energy storage battery, and in the energy discharging stage, the high capacitance end in the energy storage battery is connected with the output end of the energy storage battery.
The second aspect of the present application provides a device for automatically controlling capacitance and electric quantity balance of a home energy storage system, the device for automatically controlling capacitance and electric quantity balance of the home energy storage system comprising:
the balance detection module is used for respectively acquiring energy data of the central energy storage battery and the edge energy storage battery and judging a balance mode of the energy storage battery according to the energy data;
the state detection module is used for acquiring the real-time charge and discharge flow of the energy storage battery and judging the charge and discharge mode of the energy storage battery according to the real-time charge and discharge flow;
the time algorithm module is used for matching a time calculation model according to the charge-discharge mode and judging a vacant mode of the energy storage battery according to the time calculation model;
and the balance adjustment module is used for determining a transfer model according to the balance mode and the idle mode, and controlling the transfer model to balance the capacitance and the electric quantity of the energy storage battery.
The third aspect of the present application provides a home energy storage system, where the home energy storage system implements each step in a method for automatically controlling capacitance and electricity balance of the home energy storage system, or includes each module in an automatically controlling capacitance and electricity balance device of the home energy storage system.
In summary, the application provides a method and a device for automatically controlling capacitance and electric quantity balance of a household energy storage system, which judge an equalization mode through energy data of a central energy storage battery and an edge energy storage battery, and start a subsequent equalization adjustment process under the condition that an equalization problem is found; judging a charging and discharging mode by the real-time charging and discharging flow, and respectively determining available free time for balancing aiming at a charging and discharging using state matching time calculation model, so as to select a balancing strategy with higher energy utilization rate; and finally, determining a transfer model according to the balance mode and the spare mode, controlling the transfer model to balance the capacitance and the electric quantity of the energy storage battery, adaptively finishing the balance of the capacitance and the electric quantity in the energy storage battery according to the actual use condition, and enhancing the performance of the energy storage battery in the household energy storage system, wherein the balance response is quick and the efficiency is high.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the application, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a flow chart of a method for automatically controlling capacitance and electricity balance of a home energy storage system according to the present application;
fig. 2 is a block diagram of an automatic control capacitance and electricity balance device of a home energy storage system according to the present application.
Detailed Description
In order to make the objects, features and advantages of the present application more obvious and understandable, the technical solutions of the embodiments of the present application are clearly and completely described, and it is apparent that the embodiments described below are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Referring to fig. 1, fig. 1 is a flowchart of a method for automatically controlling capacitance and electric quantity balance of a home energy storage system according to the present application.
The embodiment of the application provides a method for automatically controlling capacitance and electric quantity balance of a household energy storage system, which comprises the following steps:
s1: respectively acquiring energy data of a central energy storage battery and an edge energy storage battery, and judging an equalization mode of the energy storage battery according to the energy data;
s2: acquiring the real-time charge and discharge flow of the energy storage battery, and judging the charge and discharge mode of the energy storage battery according to the real-time charge and discharge flow;
s3: according to the charge-discharge mode matching time calculation model, judging a vacant mode of the energy storage battery according to the time calculation model;
s4: and determining a transfer model according to the balance mode and the idle mode, and controlling the transfer model to balance the capacitance and the electric quantity of the energy storage battery.
As an embodiment, the household energy storage system in S1 stores solar energy or redundant domestic electricity through an energy storage battery, and outputs electric energy through the energy conversion equipment to operate electric equipment. The energy storage battery can be a conventional recyclable battery such as a lithium source, and can be a battery pack formed by connecting a plurality of batteries in series according to a straight line. The energy storage batteries may include a central energy storage battery located in a central region of the battery pack and edge energy storage batteries located in regions on either side of the battery pack. The energy data may be directly measured power data of capacitance, power, voltage, current, etc. And judging the balance condition inside the energy storage batteries according to the energy data of the center energy storage battery and the edge energy storage battery, starting a subsequent balance adjustment process under the condition that the balance problem is found, and matching a balance adjustment strategy according to the balance degree.
And S2, the real-time charge and discharge flow refers to the comprehensive electric energy flow of the energy storage battery, reflects the charge and discharge states of the energy storage battery, and respectively determines the free time available for balancing according to the charge and discharge states. The comprehensive electric energy flow can be obtained by calculating after respectively counting the electric energy flows of the charging end and the discharging end of the energy storage battery, and can also be directly obtained by measuring the change rate of the charging and discharging electric energy of the whole energy storage battery.
And S3, respectively calculating the free time according to the charge and discharge states of the energy storage battery, so as to select an equalization strategy with higher energy utilization rate. The time calculation model is used for inputting the real-time charge and discharge energy data of the energy storage battery and outputting the residual time for achieving the electric quantity balance, and can be a conventional calculation model used for calculating the electric quantity balance time in the field. And determining the idle time through a time calculation model, and dividing the idle time into intervals to judge the emergency degree.
And S4, different electric quantity transfer schemes are selected according to the balance degree and the emergency degree of the energy storage battery, for example, the energy storage battery can be divided into two modes of internal transfer and external transfer, and the electric quantity balance configuration is completed by adjusting the electric energy flow directions and the flow rates of the input end, the output end, the high-capacitance end and the low-capacitance end, so that the electric quantity balance of the capacitor in the energy storage battery can be completed adaptively according to the actual use condition, the balance response is quick, the efficiency is high, the safety hosting function of a household energy storage system is realized, and the service life of the energy storage battery is prolonged.
According to an embodiment of the present application, the energy data includes a cell voltage, and determining an equalization mode of the energy storage battery according to the energy data includes:
calculating a charging difference value between the cell voltage of the central energy storage battery and a preset cell voltage;
if the charging energy difference value is smaller than a charging energy preset range, calculating a cell voltage difference value of the central energy storage battery and the edge energy storage battery;
and determining an equalization mode of the energy storage battery according to the cell voltage difference value.
As an embodiment, the intelligent photosensitive sensor feeds back the household energy storage system after detecting sunlight, and the household energy storage system starts the intelligent household photovoltaic array to charge the energy storage battery pack after receiving the feedback. After the household energy storage system confirms that the photovoltaic array is started, the intelligent voltage sensor is started to acquire the cell voltage of the central energy storage battery, and the cell voltage is assumed to be 4.0V. And simultaneously, the rated voltage of the central energy storage battery in a full state is obtained, and the rated voltage is assumed to be 4.2V. The charging difference between the calculated cell voltage and the preset cell voltage is smaller than the charging preset range and is assumed to be 0.5V, which indicates that the energy storage battery is in an electric quantity overflow state, and electric quantity equalization is needed at the moment. If the energy storage battery exceeds the energy charging preset range, the storage space of the energy storage battery is enough, and at the moment, electric quantity equalization is not needed, and the subsequent process is stopped. And then the household energy storage system starts the voltage sensors at two sides after receiving the feedback of the battery voltage sensor at the central area, acquires the cell voltage of the left-side edge energy storage battery, which is assumed to be 3.2V, and acquires the cell voltage of the right-side edge energy storage battery, which is assumed to be 3.4V. The household energy storage system calculates the voltage difference of the battery core for two times to be 0.8V and 0.6V respectively, the current central energy storage battery is larger than the battery core voltage difference of the energy storage batteries at the left and right edges, the balanced mode is judged to be a serious mode, the battery core voltage difference is more than 0.3V, the balanced mode is judged to be a common mode, and the battery core voltage difference is more than 0.1V, and the balanced mode is judged to be a normal mode.
According to an embodiment of the present application, the real-time charging and discharging flow includes a photovoltaic charging flow, a grid charging flow and a discharging flow, and the obtaining the real-time charging and discharging flow of the energy storage battery includes:
acquiring the photovoltaic charging flow of the photovoltaic end of the energy storage battery;
acquiring the grid charging flow of the energy storage battery grid end;
and obtaining the discharging flow of the output end of the energy storage battery.
As an embodiment, the energy storage battery in the household energy storage system may be composed of two electric quantity input ends, which are respectively the electric power generated by the photovoltaic solar power generation device and the residual electric power generated by the household electric appliance connected to the power grid. Considering the condition that the energy storage battery has electric energy input and output at the same time, the electric energy flow of the two input ends and the electric energy flow of the output end are respectively counted, and the change degree of charge and discharge can be calculated while the charge and discharge are determined, so that a basis is provided for accurately determining the free time.
According to an embodiment of the present application, the determining the charge and discharge mode of the energy storage battery according to the real-time charge and discharge flow includes:
calculating a first influence capacitance according to the product of the photovoltaic charging flow and a preset time interval;
calculating a second influence capacitance according to the product of the charging flow of the power grid and a preset time interval;
calculating a third influence capacitance according to the product of the energy release flow and a preset time interval;
and judging the charge and discharge modes of the energy storage battery according to the relation between the sum of the first influence capacitance, the second influence capacitance and the third influence capacitance and a preset threshold value.
As an embodiment, the influence capacitance value is calculated by the product of the real-time charge-discharge quantity and the time interval of the input end and the output end, and the influence capacitance is relatively stable in a certain time, so that the influence capacitance is utilized to determine the charge-discharge mode, and the situation that the energy data measurement and calculation abnormality exists at the individual time points can be eliminated. The household energy storage system obtains the photovoltaic charging flow of the photovoltaic end of the current energy storage battery, sets the time interval to be 1 minute, calculates the first influence capacitance to be marked as A1, calculates the second influence capacitance and the third influence capacitance to be marked as A2 and A3 respectively in the same way, and calculates whether the value of A1+A2-A3 is larger than 0. If the electric quantity is larger than 0, the charge and discharge mode is judged to be the charge mode, and if the electric quantity is smaller than 0, the charge and discharge mode is judged to be the discharge mode. The value a1+a2-A3 may be divided into a low-speed mode and a high-speed mode, and the adjustment coefficients may be set to 1 and 2, respectively.
According to an embodiment of the present application, determining a vacant mode of the energy storage battery according to the time calculation model includes:
acquiring rated capacitance, overheat loss and real-time voltage of the energy storage battery, inputting the rated capacitance, overheat loss and real-time voltage into the time calculation model, and outputting balance time;
determining a vacant mode of the energy storage battery according to the magnitude relation between the balance time and the first preset time;
the time calculation model is as follows: balance time = rated capacitance x overheat loss/real time voltage x time unit.
As an example, the home energy storage system obtains the overheat loss (assumed to be 10%) and the real-time voltage (3V) when the energy is currently charged, and obtains the rated capacitance (assumed to be 100%) through the configuration information of the energy storage battery, and the time unit is assumed to be 1 minute, and the rated capacitance is brought into the time calculation model to output the balance time for balancing. The idle mode may be classified into a normal mode and a severe mode according to the length of the equilibrium time, such as more than 5 minutes or less than 5 minutes. In addition, the balance time after the adjustment coefficient is calculated and adjusted can be introduced on the basis of the balance time, and then the vacant mode is judged.
According to an embodiment of the present application, determining a vacant mode of the energy storage battery according to the time calculation model includes:
acquiring rated capacitance and real-time voltage of the energy storage battery, inputting the rated capacitance and the real-time voltage into the time calculation model, and outputting balance time;
determining a vacant mode of the energy storage battery according to the magnitude relation between the balance time and the second preset time;
the time calculation model is as follows: balance time = rated capacitance/real-time voltage time unit.
As an embodiment, the home energy storage system obtains the current real-time voltage (4.2V), and obtains the rated capacitance (assumed to be 100%) through the configuration information of the energy storage battery, and the time unit is assumed to be 1 minute, and the time unit is brought into the time calculation model to output the balance time for balancing. The same principle can divide the interval according to the length of the balance time, divide the spare mode into a normal mode and a serious mode, and can also introduce the above adjustment coefficient to calculate the adjusted balance time on the basis of the balance time, and then judge the spare mode. The first preset time and the second preset time may be equal.
According to an embodiment of the present application, determining a transfer model from the equalization pattern and the free pattern includes:
when the balance mode or the idle mode is a common mode, acquiring the capacitance of the central energy storage battery and the capacitance of the edge energy storage battery and dividing the energy storage batteries into a high capacitance end and a low capacitance end;
setting the transfer direction of the transfer model as a high-capacitance end to a low-capacitance end in the energy storage battery.
As an embodiment, the balancing mode or the spare mode is a common mode, which indicates that the balance problem of the energy storage battery is lighter or the spare balancing time for balancing is more, and in order to simplify the balancing process and reduce the resource allocation, the balancing can be directly completed by adopting a simple internal transfer capacitance electric quantity mode. Specifically, under the charging mode, assuming that the acquired capacitance of the central energy storage battery is 90% and the capacitance of the edge energy storage battery is 60% and 60% respectively, the household energy storage system transfers the capacitance electric quantity of the control central energy storage battery to the two directions of the edge storage battery, and the capacitance electric quantity of the energy storage batteries in the three areas is changed to be consistent. Under the energy release mode, the capacitance of the central energy storage battery is assumed to be 60%, the capacitance of the edge energy storage battery is assumed to be 70% and 70%, the capacitance of the edge energy storage battery is controlled to be transferred to the central battery in one direction by the household energy storage system, and the capacitance of the energy storage batteries in the three areas is changed to be consistent.
According to an embodiment of the present application, determining a transfer model from the equalization pattern and the free pattern includes:
when the balance mode and the spare mode are the severe mode, acquiring the capacitances of the central energy storage battery and the edge energy storage battery and dividing the energy storage batteries into a high capacitance end and a low capacitance end;
setting the transfer direction of the transfer model as follows: and in the energy charging stage, the photovoltaic end of the energy storage battery is connected with the low capacitance end in the energy storage battery, and in the energy discharging stage, the high capacitance end in the energy storage battery is connected with the output end of the energy storage battery.
As an embodiment, the equalization mode and the idle mode are severe modes, which indicates that the balance problem of the energy storage battery is heavy and the idle balancing time available for equalization is short, and the equalization of electric quantity needs to be completed within a limit time, so as to avoid the phenomenon of overcharge and overdischarge of the energy storage battery. At the moment, the external input end and the external output end of the energy storage battery are required to participate in allocation together so as to optimize the electric quantity balance efficiency. Specifically, under the charging mode, assuming that the acquired central energy storage battery capacitance is 90% and the edge energy storage battery capacitances are 60% and 60% respectively, the household energy storage system directly charges the two edge storage batteries with the capacitance electric quantity by the photovoltaic end for controlling the core electric power input until the capacitance electric quantity of the energy storage batteries in the three areas becomes consistent. Under the energy release mode, the capacitance of the central energy storage battery is assumed to be 60%, the capacitance of the edge energy storage batteries is respectively 70% and 70%, and the household energy storage system directly releases energy to the power output end by controlling the capacitance electric quantity of the two edge energy storage batteries until the capacitance electric quantity of the energy storage batteries in the three areas becomes consistent.
Referring to fig. 2, fig. 2 is a block diagram of an automatic control capacitor electric quantity balancing device of a home energy storage system according to the present application.
The embodiment of the application also provides a device for automatically controlling the capacitance and the electric quantity balance of the household energy storage system, which comprises:
the balance detection module 1 is used for respectively acquiring energy data of the central energy storage battery and the edge energy storage battery and judging a balance mode of the energy storage battery according to the energy data;
the state detection module 2 is used for acquiring the real-time charge and discharge quantity of the energy storage battery and judging the charge and discharge mode of the energy storage battery according to the real-time charge and discharge quantity;
the time algorithm module 3 is used for matching a time calculation model according to the charge-discharge mode and judging a spare mode of the energy storage battery according to the time calculation model;
and the balance adjustment module 4 is used for determining a transfer model according to the balance mode and the idle mode, and controlling the transfer model to balance the capacitance and the electric quantity of the energy storage battery.
According to an embodiment of the present application, the energy data includes a cell voltage, and the equalization detection module is specifically configured to:
calculating a charging difference value between the cell voltage of the central energy storage battery and a preset cell voltage;
if the charging energy difference value is smaller than a charging energy preset range, starting to calculate a cell voltage difference value of the central energy storage battery and the edge energy storage battery;
and determining an equalization mode of the energy storage battery according to the cell voltage difference value.
According to the embodiment of the application, the real-time charging and discharging flow comprises photovoltaic charging flow, grid charging flow and discharging flow, and the state detection module is specifically used for:
acquiring the photovoltaic charging flow of the photovoltaic end of the energy storage battery;
acquiring the grid charging flow of the energy storage battery grid end;
and obtaining the discharging flow of the output end of the energy storage battery.
According to an embodiment of the present application, the state detection module is specifically configured to:
calculating a first influence capacitance according to the product of the photovoltaic charging flow and a preset time interval;
calculating a second influence capacitance according to the product of the charging flow of the power grid and a preset time interval;
calculating a third influence capacitance according to the product of the energy release flow and a preset time interval;
and judging the charge and discharge modes of the energy storage battery according to the relation between the sum of the first influence capacitance, the second influence capacitance and the third influence capacitance and a preset threshold value.
According to the embodiment of the application, the time algorithm module is specifically used for:
acquiring rated capacitance, overheat loss and real-time voltage of the energy storage battery, inputting the rated capacitance, overheat loss and real-time voltage into the time calculation model, and outputting balance time;
determining a vacant mode of the energy storage battery according to the magnitude relation between the balance time and the first preset time;
the time calculation model is as follows: balance time = rated capacitance x overheat loss/real time voltage x time unit.
According to the embodiment of the application, the time algorithm module is specifically used for:
acquiring rated capacitance and real-time voltage of the energy storage battery, inputting the rated capacitance and the real-time voltage into the time calculation model, and outputting balance time;
determining a vacant mode of the energy storage battery according to the magnitude relation between the balance time and the second preset time;
the time calculation model is as follows: balance time = rated capacitance/real-time voltage time unit.
According to an embodiment of the present application, the balance adjustment module is specifically configured to:
when the balance mode or the idle mode is a common mode, acquiring the capacitance of the central energy storage battery and the capacitance of the edge energy storage battery and dividing the energy storage batteries into a high capacitance end and a low capacitance end;
setting the transfer direction of the transfer model as a high-capacitance end to a low-capacitance end in the energy storage battery.
According to an embodiment of the present application, the balance adjustment module is specifically configured to:
when the balance mode and the spare mode are the severe mode, acquiring the capacitances of the central energy storage battery and the edge energy storage battery and dividing the energy storage batteries into a high capacitance end and a low capacitance end;
setting the transfer direction of the transfer model as follows: and in the energy charging stage, the photovoltaic end of the energy storage battery is connected with the low capacitance end in the energy storage battery, and in the energy discharging stage, the high capacitance end in the energy storage battery is connected with the output end of the energy storage battery.
The application also provides a household energy storage system which realizes each step in the method for automatically controlling the capacitance and electric quantity balance by the household energy storage system or comprises each module in the device for automatically controlling the capacitance and electric quantity balance by the household energy storage system.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will 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 and scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. The method for automatically controlling the capacitance and electric quantity balance of the household energy storage system is characterized by comprising the following steps of:
respectively acquiring energy data of a central energy storage battery and an edge energy storage battery, and judging an equalization mode of the energy storage battery according to the energy data;
acquiring the real-time charge and discharge flow of the energy storage battery, and judging the charge and discharge mode of the energy storage battery according to the real-time charge and discharge flow;
according to the charge-discharge mode matching time calculation model, judging a vacant mode of the energy storage battery according to the time calculation model;
and determining a transfer model according to the balance mode and the idle mode, and controlling the transfer model to balance the capacitance and the electric quantity of the energy storage battery.
2. The method of claim 1, wherein the energy data comprises a cell voltage, and determining an equalization pattern of the energy storage battery based on the energy data comprises:
calculating a charging difference value between the cell voltage of the central energy storage battery and a preset cell voltage;
if the charging energy difference value is smaller than a charging energy preset range, calculating a cell voltage difference value of the central energy storage battery and the edge energy storage battery;
and determining an equalization mode of the energy storage battery according to the cell voltage difference value.
3. The method of claim 1, wherein the real-time charging and discharging flow comprises photovoltaic charging flow, grid charging flow and discharging flow, and the obtaining the real-time charging and discharging flow of the energy storage battery comprises:
acquiring the photovoltaic charging flow of the photovoltaic end of the energy storage battery;
acquiring the grid charging flow of the energy storage battery grid end;
and obtaining the discharging flow of the output end of the energy storage battery.
4. The method for automatically controlling capacity and charge balance of a home energy storage system according to claim 3, wherein said determining a charge and discharge mode of the energy storage battery according to the real-time charge and discharge amount comprises:
calculating a first influence capacitance according to the product of the photovoltaic charging flow and a preset time interval;
calculating a second influence capacitance according to the product of the charging flow of the power grid and a preset time interval;
calculating a third influence capacitance according to the product of the energy release flow and a preset time interval;
and judging the charge and discharge modes of the energy storage battery according to the relation between the sum of the first influence capacitance, the second influence capacitance and the third influence capacitance and a preset threshold value.
5. The method of automatically controlling capacitive charge balance for a home energy storage system of claim 1, wherein determining a free mode of the energy storage battery based on the time calculation model comprises:
acquiring rated capacitance, overheat loss and real-time voltage of the energy storage battery, inputting the rated capacitance, overheat loss and real-time voltage into the time calculation model, and outputting balance time;
determining a vacant mode of the energy storage battery according to the magnitude relation between the balance time and the first preset time;
the time calculation model is as follows: balance time = rated capacitance x overheat loss/real time voltage x time unit.
6. The method of automatically controlling capacitive charge balance for a home energy storage system of claim 1, wherein determining a free mode of the energy storage battery based on the time calculation model comprises:
acquiring rated capacitance and real-time voltage of the energy storage battery, inputting the rated capacitance and the real-time voltage into the time calculation model, and outputting balance time;
determining a vacant mode of the energy storage battery according to the magnitude relation between the balance time and the second preset time;
the time calculation model is as follows: balance time = rated capacitance/real-time voltage time unit.
7. The method of automatically controlling capacitive charge balance for a home energy storage system of claim 1, wherein determining a transfer model based on the equalization pattern and the free pattern comprises:
when the balance mode or the idle mode is a common mode, acquiring the capacitance of the central energy storage battery and the capacitance of the edge energy storage battery, and dividing the energy storage batteries into a high capacitance end and a low capacitance end;
setting the transfer direction of the transfer model as a high-capacitance end to a low-capacitance end in the energy storage battery.
8. The method of automatically controlling capacitive charge balance for a home energy storage system of claim 1, wherein determining a transfer model based on the equalization pattern and the free pattern comprises:
when the balance mode and the spare mode are the severe mode, acquiring the capacitances of the central energy storage battery and the edge energy storage battery and dividing the energy storage batteries into a high capacitance end and a low capacitance end;
setting the transfer direction of the transfer model as follows: and in the energy charging stage, the photovoltaic end of the energy storage battery is connected with the low capacitance end in the energy storage battery, and in the energy discharging stage, the high capacitance end in the energy storage battery is connected with the output end of the energy storage battery.
9. The utility model provides a family's energy storage system automatic control electric capacity electric quantity balancing unit which characterized in that, family's energy storage system automatic control electric capacity electric quantity balancing unit includes:
the balance detection module is used for respectively acquiring energy data of the central energy storage battery and the edge energy storage battery and judging a balance mode of the energy storage battery according to the energy data;
the state detection module is used for acquiring the real-time charge and discharge flow of the energy storage battery and judging the charge and discharge mode of the energy storage battery according to the real-time charge and discharge flow;
the time algorithm module is used for matching a time calculation model according to the charge-discharge mode and judging a vacant mode of the energy storage battery according to the time calculation model;
and the balance adjustment module is used for determining a transfer model according to the balance mode and the idle mode, and controlling the transfer model to balance the capacitance and the electric quantity of the energy storage battery.
10. A home energy storage system, characterized in that the home energy storage system implements the steps in the method for automatically controlling capacitance and electricity balance of the home energy storage system according to any one of claims 1 to 8, or comprises the modules in the device for automatically controlling capacitance and electricity balance of the home energy storage system according to claim 9.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116566007A (en) * | 2023-05-16 | 2023-08-08 | 深圳三晖能源科技有限公司 | Automatic regulation method and device for battery charge and discharge and intelligent outdoor power supply system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015124161A1 (en) * | 2014-02-24 | 2015-08-27 | Volvo Truck Corporation | Electrical storage system for a vehicle and method for controlling said system |
| CN110752635A (en) * | 2019-10-12 | 2020-02-04 | 山东大学 | Online capacity monitoring and charging and discharging dual-state equalization circuit and method for series battery pack |
| CN111342529A (en) * | 2020-04-14 | 2020-06-26 | 深圳市迈威芯片设计有限公司 | Lithium battery charge and discharge energy transfer balancing system and method |
| KR20200135046A (en) * | 2019-05-24 | 2020-12-02 | 주식회사 엘지화학 | Cell balancing method and battery management system using the same |
-
2023
- 2023-07-25 CN CN202310918716.9A patent/CN116961184B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015124161A1 (en) * | 2014-02-24 | 2015-08-27 | Volvo Truck Corporation | Electrical storage system for a vehicle and method for controlling said system |
| KR20200135046A (en) * | 2019-05-24 | 2020-12-02 | 주식회사 엘지화학 | Cell balancing method and battery management system using the same |
| CN110752635A (en) * | 2019-10-12 | 2020-02-04 | 山东大学 | Online capacity monitoring and charging and discharging dual-state equalization circuit and method for series battery pack |
| CN111342529A (en) * | 2020-04-14 | 2020-06-26 | 深圳市迈威芯片设计有限公司 | Lithium battery charge and discharge energy transfer balancing system and method |
Non-Patent Citations (1)
| Title |
|---|
| 丑丽丽;杜海江;朱冬华;: "一种新型蓄电池组的均衡拓扑及其控制策略", 电力与能源, no. 05, 20 October 2011 (2011-10-20) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116566007A (en) * | 2023-05-16 | 2023-08-08 | 深圳三晖能源科技有限公司 | Automatic regulation method and device for battery charge and discharge and intelligent outdoor power supply system |
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