CN118199222B - Feedback electric energy transmission state control method and related device for retired battery - Google Patents
Feedback electric energy transmission state control method and related device for retired battery Download PDFInfo
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- CN118199222B CN118199222B CN202410605672.9A CN202410605672A CN118199222B CN 118199222 B CN118199222 B CN 118199222B CN 202410605672 A CN202410605672 A CN 202410605672A CN 118199222 B CN118199222 B CN 118199222B
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- 238000000034 method Methods 0.000 title claims abstract description 64
- 230000005540 biological transmission Effects 0.000 title claims abstract description 17
- 238000004146 energy storage Methods 0.000 claims abstract description 80
- 230000015654 memory Effects 0.000 claims description 29
- 230000006870 function Effects 0.000 claims description 11
- 238000013178 mathematical model Methods 0.000 claims description 6
- 238000011426 transformation method Methods 0.000 claims description 5
- 238000004590 computer program Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 description 6
- 239000002699 waste material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 238000004422 calculation algorithm Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000009795 derivation Methods 0.000 description 2
- 230000005291 magnetic effect Effects 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000001131 transforming effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/54—Reclaiming serviceable parts of waste accumulators
-
- 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
-
- 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
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
-
- 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
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a feedback electric energy transmission state control method and a related device of retired batteries, wherein the method comprises the following steps: classifying a plurality of retired batteries according to current battery voltage data and current battery capacity data; selecting a plurality of retired batteries from the same classified retired battery pack to be connected in series in a retired battery serial groove, and obtaining serial voltage data; judging whether the load end for the micro-grid is used for supplying power or the energy storage battery pack is used for charging based on the series voltage data; when the feedback control device is used for supplying power to a load end, the feedback control device performs inversion control on the inverter based on load parameters of the load end; when the feedback control device is used for charging the energy storage battery pack, the feedback control device starts a charging program and controls a plurality of retired batteries connected in series in the retired battery serial grooves to charge the energy storage battery pack. In the embodiment of the invention, the classification of the retired batteries is realized, and the residual electric quantity of the retired batteries is recycled according to the serial voltage of serial connection of the retired batteries with different classifications.
Description
Technical Field
The invention relates to the technical field of retired battery processing, in particular to a feedback electric energy transmission state control method and a related device for retired batteries.
Background
Along with the popularization of new energy automobiles, more and more power batteries become retired batteries in the future, and before the retired batteries are processed, the retired batteries need to be subjected to discharge processing, and as the retired batteries are the power batteries of the automobiles before being retired, more electric energy remains in the retired batteries, and a traditional discharge processing mode is directly used, so that a large amount of electric energy is wasted when the retired batteries are discharged in a large amount and cannot be recycled; therefore, a mode is urgently needed, and the retired battery can be subjected to electric energy recovery, so that the waste of electric energy is reduced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a feedback electric energy transmission state control method and a related device for retired batteries, which are used for classifying the retired batteries and recycling the residual electric quantity of the retired batteries according to serial voltage of serial connection of the retired batteries of different classifications.
In order to solve the technical problems, the embodiment of the invention provides a feedback electric energy transmission state control method of a retired battery, which is applied to electric energy feedback equipment, wherein the electric energy feedback equipment comprises feedback control equipment, a retired battery serial groove, an inverter and an energy storage battery pack; the method comprises the following steps:
Classifying the plurality of retired batteries according to the current battery voltage data and the current battery capacity data to obtain classified retired battery packs with consistent battery voltage data and battery capacity data;
selecting a plurality of retired batteries from the same classified retired battery pack to be connected in series in a retired battery serial groove, and obtaining serial voltage data at two ends of the retired battery serial groove in real time;
judging that a plurality of retired batteries connected in series in the retired battery serial groove are used for supplying power to a load end of a micro-grid or used for charging an energy storage battery pack based on the serial voltage data;
When a plurality of retired batteries connected in series in the retired battery serial groove are used for supplying power to the load end of the micro-grid, the feedback control equipment performs inversion control on the inverter based on the load parameters of the load end of the micro-grid;
When a plurality of retired batteries connected in series in the retired battery serial groove are used for charging the energy storage battery pack, the feedback control equipment starts a charging program to control the plurality of retired batteries connected in series in the retired battery serial groove to charge and control the energy storage battery pack.
Optionally, the classifying the plurality of retired batteries according to the current battery voltage data and the current battery capacity data to obtain a classified retired battery pack with consistent battery voltage data and battery capacity data, including:
Detecting the current battery voltage and the current battery capacity of each of the plurality of retired batteries respectively to obtain current battery voltage data and current battery capacity data of each of the plurality of retired batteries;
and classifying the retired battery with the same current battery voltage data and the same current battery capacity data to obtain a classified retired battery pack with the same battery voltage data and the same battery capacity data.
Optionally, the selecting a plurality of retired batteries from the same classified retired battery pack to be connected in series in the retired battery serial slot, and obtaining serial voltage data at two ends of the retired battery serial slot in real time includes:
selecting a corresponding number of retired batteries in the same classified retired battery pack according to the number of the retired battery serial grooves, and arranging the selected retired batteries in the retired battery serial grooves in series;
And the feedback control equipment controls the voltage acquisition equipment arranged on the retired battery serial groove to acquire and process the serial voltage data at the two ends of the retired battery serial groove in real time, so as to obtain the serial voltage data at the two ends of the retired battery serial groove.
Optionally, the determining, based on the series voltage data, that the plurality of retired batteries connected in series in the retired battery serial slot are used for power supply of a load end of a micro-grid or for charging an energy storage battery pack includes:
Comparing the serial voltage data with set voltage data, and judging that a plurality of retired batteries connected in series in the retired battery serial groove are used for supplying power to a load end of a micro-grid or for charging an energy storage battery pack according to a comparison result;
When the comparison result is that the serial voltage data is greater than or equal to the set voltage data, judging that a plurality of retired batteries connected in series in the retired battery serial groove are used for supplying power to a load end of the micro-grid;
And when the comparison result is that the series voltage data is smaller than the set voltage data, judging that a plurality of retired batteries connected in series in the retired battery series groove are used for charging the energy storage battery pack.
Optionally, the feedback control device performs inverter control on the inverter based on a load parameter of a load end of the micro-grid, including:
The feedback control equipment obtains target parameters of an output end corresponding to the inverter, wherein the target parameters comprise an inductor current arranged at the output end, an inverter output voltage, an input voltage of an LC filter arranged at the output end, a filter inductance, a filter capacitance and a radius of the LC filter;
And the feedback control equipment generates a control signal according to the target parameter and performs inversion control on the inverter based on the control signal.
Optionally, the feedback control device generates a control signal according to the target parameter, and performs inversion control on the inverter based on the control signal, including:
The feedback control equipment constructs a constraint control model according to the target parameters, wherein the constraint control model is used for constraining the output quantity and limiting all closed-loop signals;
converting the constraint control model into an equivalent constraint control model based on an error transformation method;
Constructing a virtual control model by utilizing a Lyapunov function according to error values of actual output parameters and expected output parameters in the equivalent constraint control model, and generating a control signal based on the virtual control model;
the feedback control device performs inversion control on the inverter based on the control signal.
Optionally, the controlling the plurality of retired batteries connected in series in the retired battery serial slot to charge and control the energy storage battery pack includes:
And controlling a plurality of retired batteries connected in series in the retired battery serial groove to charge and control the energy storage battery pack according to a DC/DC mathematical model according to the serial voltage data.
In addition, the embodiment of the invention also provides a feedback electric energy transmission state control device of the retired battery, which is applied to electric energy feedback equipment, wherein the electric energy feedback equipment comprises feedback control equipment, a retired battery serial slot, an inverter and an energy storage battery pack; the device comprises:
And a classification module: the method comprises the steps of classifying a plurality of retired batteries according to current battery voltage data and current battery capacity data to obtain classified retired battery packs with consistent battery voltage data and battery capacity data;
the voltage acquisition module: the method comprises the steps of selecting a plurality of retired batteries from the same classified retired battery pack to be connected in series in a retired battery serial groove, and obtaining serial voltage data at two ends of the retired battery serial groove in real time;
and a judging module: the method comprises the steps of judging that a plurality of retired batteries connected in series in a retired battery serial groove are used for supplying power to a load end of a micro-grid or used for charging an energy storage battery pack based on the serial voltage data;
The inversion control module: when a plurality of retired batteries connected in series in the retired battery serial groove are used for supplying power to the load end of the micro-grid, the feedback control equipment performs inversion control on the inverter based on the load parameters of the load end of the micro-grid;
And a charging control module: when the plurality of retired batteries connected in series in the retired battery serial groove are used for charging the energy storage battery pack, the feedback control equipment starts a charging program to control the plurality of retired batteries connected in series in the retired battery serial groove to charge and control the energy storage battery pack.
In addition, an embodiment of the present invention further provides a computer readable storage medium, on which a computer program is stored, where the program when executed by a processor implements the feedback power delivery status control method according to any one of the above.
In addition, the embodiment of the invention also provides feedback control equipment, which comprises:
One or more processors;
A memory;
one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the one or more processors, the one or more applications configured to: the feedback power delivery state control method according to any one of the above is performed.
In the embodiment of the invention, classification processing is carried out according to the current battery voltage data and the current battery capacity data of the retired batteries, and then a plurality of retired batteries in the same classified retired battery pack are connected in series in a retired battery serial groove, so that serial voltage data are obtained; judging whether the power supply is used for supplying power to a load end or charging an energy storage battery pack according to the serial voltage data, performing inversion control on an inverter when the power supply is used for supplying power to the load end, and performing charging control on the energy storage battery pack when the power supply is used for charging the energy storage battery pack; therefore, the classification of the retired batteries can be realized, the residual electric quantity of the retired batteries is recycled according to the serial voltage of serial connection of the retired batteries with different classifications, and the waste of the residual electric energy in the retired batteries is reduced.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings which are required 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 invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a feedback power delivery status control method for retired batteries according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a feedback power transmission status control device for retired batteries according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a feedback control device according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a flow chart illustrating a feedback power transmission status control method of a retired battery according to an embodiment of the invention.
As shown in fig. 1, a feedback power transmission state control method of a retired battery is applied to power feedback equipment, wherein the power feedback equipment comprises feedback control equipment, a retired battery serial slot, an inverter and an energy storage battery pack;
In the implementation process of the invention, the electric energy feedback equipment at least comprises feedback control equipment, a retired battery serial slot, an inverter and an energy storage battery pack, wherein the feedback control equipment is in signal connection with the retired battery serial slot, the inverter and the energy storage battery pack; wherein the retired battery serial slot is connected with the inverter and the energy storage battery pack through a direct current bus, the output end of the inverter is connected with a micro-grid, and a load end is arranged on the micro-grid; an LC filter is provided between the inverter and the microgrid.
The method comprises the following steps:
S11: classifying the plurality of retired batteries according to the current battery voltage data and the current battery capacity data to obtain classified retired battery packs with consistent battery voltage data and battery capacity data;
Specifically, the classifying processing is performed on a plurality of retired batteries according to current battery voltage data and current battery capacity data to obtain classified retired battery packs with consistent battery voltage data and battery capacity data, including: detecting the current battery voltage and the current battery capacity of each of the plurality of retired batteries respectively to obtain current battery voltage data and current battery capacity data of each of the plurality of retired batteries; and classifying the retired battery with the same current battery voltage data and the same current battery capacity data to obtain a classified retired battery pack with the same battery voltage data and the same battery capacity data.
Specifically, each of a plurality of retired batteries in a warehouse is numbered firstly, then the voltage and the capacity of each of the numbered retired batteries are measured, and the current battery voltage data and the current battery capacity data of each of the plurality of retired batteries can be obtained; and comparing and binding the battery voltage data with the serial numbers of the battery voltage data, and classifying the retired battery corresponding to the uniform serial numbers of the current battery voltage data and the current battery capacity data in a classification mode to obtain the classified retired battery pack with the uniform battery voltage data and the uniform battery capacity data. By classifying according to the voltage data and the capacity data, it is possible to realize that when the retired batteries are connected in series, the voltage data and the capacity data of the retired batteries connected in series are substantially identical; the probability of thermal runaway of the retired battery in the discharging process can be reduced, meanwhile, the rapid attenuation of one battery in series connection can be reduced, so that the discharging efficiency of other retired batteries in series connection is reduced, and the discharging synchronization cannot be realized.
S12: selecting a plurality of retired batteries from the same classified retired battery pack to be connected in series in a retired battery serial groove, and obtaining serial voltage data at two ends of the retired battery serial groove in real time;
In the implementation process of the invention, the method for selecting a plurality of retired batteries from the same classified retired battery pack to be connected in series in the retired battery serial groove and obtaining the serial voltage data at two ends of the retired battery serial groove in real time comprises the following steps: selecting a corresponding number of retired batteries in the same classified retired battery pack according to the number of the retired battery serial grooves, and arranging the selected retired batteries in the retired battery serial grooves in series; and the feedback control equipment controls the voltage acquisition equipment arranged on the retired battery serial groove to acquire and process the serial voltage data at the two ends of the retired battery serial groove in real time, so as to obtain the serial voltage data at the two ends of the retired battery serial groove.
Specifically, a corresponding number of retired batteries are selected from the same classified retired battery pack according to the number of the retired battery serial grooves, and the selected retired batteries are arranged in the retired battery serial grooves in series according to the positive and negative directions of the retired battery serial grooves; the method comprises the steps that voltage acquisition equipment is arranged on a retired battery serial groove, and then feedback control equipment controls the voltage acquisition equipment arranged on the retired battery serial groove to acquire and process serial voltage data at two ends of the retired battery serial groove in real time, so that the serial voltage data at two ends of the retired battery serial groove are obtained; the voltage acquisition is performed in real time, namely, the voltage acquisition is realized by setting the corresponding acquisition frequency of the voltage acquisition equipment; the method has the advantages that the series voltage data are collected, so that the electric energy generated by the series retired batteries in the retired battery series groove can be conveniently judged to be used for micro-grid power supply or energy storage battery pack charging.
S13: judging that a plurality of retired batteries connected in series in the retired battery serial groove are used for supplying power to a load end of a micro-grid or used for charging an energy storage battery pack based on the serial voltage data;
In the implementation process of the invention, the determining, based on the series voltage data, that the plurality of retired batteries connected in series in the retired battery serial slot are used for power supply of a load end of a micro-grid or for charging of an energy storage battery pack includes: comparing the serial voltage data with set voltage data, and judging that a plurality of retired batteries connected in series in the retired battery serial groove are used for supplying power to a load end of a micro-grid or for charging an energy storage battery pack according to a comparison result; when the comparison result is that the serial voltage data is greater than or equal to the set voltage data, judging that a plurality of retired batteries connected in series in the retired battery serial groove are used for supplying power to a load end of the micro-grid; and when the comparison result is that the series voltage data is smaller than the set voltage data, judging that a plurality of retired batteries connected in series in the retired battery series groove are used for charging the energy storage battery pack.
Specifically, after series voltage data are obtained, comparing the series voltage data with set voltage data, and judging that a plurality of retired batteries connected in series in the retired battery serial groove are used for supplying power to a load end of a micro-grid or for charging an energy storage battery pack according to a comparison result; the voltage cannot be lower than a certain voltage value because of the voltage requirement on the micro-grid; setting the preset voltage data to be the lowest voltage value required by the micro-grid power supply; when the comparison result is that the serial voltage data is greater than or equal to the set voltage data, judging that a plurality of retired batteries connected in series in the retired battery serial groove are used for supplying power to a load end of the micro-grid; and when the comparison result is that the series voltage data is smaller than the set voltage data, judging that a plurality of retired batteries connected in series in the retired battery series groove are used for charging the energy storage battery pack.
S14: when a plurality of retired batteries connected in series in the retired battery serial groove are used for supplying power to the load end of the micro-grid, the feedback control equipment performs inversion control on the inverter based on the load parameters of the load end of the micro-grid;
in the implementation process of the invention, the feedback control device performs inversion control on the inverter based on the load parameter of the load end of the micro-grid, and the feedback control device comprises: the feedback control equipment obtains target parameters of an output end corresponding to the inverter, wherein the target parameters comprise an inductor current arranged at the output end, an inverter output voltage, an input voltage of an LC filter arranged at the output end, a filter inductance, a filter capacitance and a radius of the LC filter; and the feedback control equipment generates a control signal according to the target parameter and performs inversion control on the inverter based on the control signal.
Further, the feedback control device generates a control signal according to the target parameter, and performs inversion control on the inverter based on the control signal, including: the feedback control equipment constructs a constraint control model according to the target parameters, wherein the constraint control model is used for constraining the output quantity and limiting all closed-loop signals; converting the constraint control model into an equivalent constraint control model based on an error transformation method; constructing a virtual control model by utilizing a Lyapunov function according to error values of actual output parameters and expected output parameters in the equivalent constraint control model, and generating a control signal based on the virtual control model; the feedback control device performs inversion control on the inverter based on the control signal.
Specifically, the feedback control device needs to obtain target parameters of an output end corresponding to the inverter, where the target parameters include an inductor current set at the output end, an output voltage of the inverter, an input voltage of an LC filter set at the output end, a filter inductance, a filter capacitance, a radius of the LC filter, and the like; the feedback control device then generates a control signal according to the target parameter, and performs inversion control on the inverter through the control signal.
In the process of producing control signals, the feedback control equipment firstly builds a constraint control model according to target parameters, wherein the constraint control model is used for constraining output quantity and limiting all closed-loop signals; wherein the constraint control model is as follows:
；
Assume that As state variables, there are；
Wherein,；；；；
Wherein,Representing the voltage input to the inverter; An inductor current at the output; Is an unknown current on the load side; the voltage output by the inverter is the input voltage of the LC filter; Is a filter inductance; Is a filter capacitor; is the radius of the LC filter.
Then converting the constraint control model into an equivalent constraint control model through an error transformation algorithm; and constructing a virtual control model by utilizing the Lyapunov function according to the error values of the actual output parameters and the expected output parameters in the equivalent constraint control model.
Wherein, parameter variables are needed to represent error values of actual output parameters and expected output parameters in the equivalent constraint control model; wherein the parameter variables are:
;
Wherein, In order to track the error in the tracking,Is the upper and lower bounds of tracking error;
The tracking error is then defined as:
；
Is that The ideal output expectations of the tracking; at this time, the process is performed,The range of (2) is as follows:
；
Wherein, ；；
Wherein the tracking error is constrained using a mapping functionAnd transforming into new variables：
；
When combining the beam control model, there are:
；
Wherein, Is thatThe parameter derivation of the parameter is obtained,；；；Is thatIs a derivative of (2); For inputting the voltage of the micro-grid, i.e. ；Is the voltage output by the inverter.
In constructing a virtual control model by using a Lyapunov function, firstly, a non-adaptive virtual controller is constructed as follows:
；
the construction of the non-self-adaptive actual controller is as follows:
;
Wherein, Is thatIs set to the desired output expected value;、、 are all positive controller parameters; And outputting results for the virtual control model.
The control signal can be generated through the constructed quasi-control model, and then the feedback control equipment performs inversion control on the inverter according to the control signal.
S15: when a plurality of retired batteries connected in series in the retired battery serial groove are used for charging the energy storage battery pack, the feedback control equipment starts a charging program to control the plurality of retired batteries connected in series in the retired battery serial groove to charge and control the energy storage battery pack.
In the implementation process of the invention, the controlling the plurality of retired batteries connected in series in the retired battery serial groove to charge the energy storage battery pack comprises the following steps: and controlling a plurality of retired batteries connected in series in the retired battery serial groove to charge and control the energy storage battery pack according to a DC/DC mathematical model according to the serial voltage data.
Specifically, the DC/DC mathematical model in the scheme uses series voltage data as charging voltage for the energy storage battery pack, and then controls a plurality of retired batteries connected in series in the retired battery serial groove to perform equalizing charge control on the energy storage battery pack by using the same charging current of each energy storage battery.
In the embodiment of the invention, classification processing is carried out according to the current battery voltage data and the current battery capacity data of the retired batteries, and then a plurality of retired batteries in the same classified retired battery pack are connected in series in a retired battery serial groove, so that serial voltage data are obtained; judging whether the power supply is used for supplying power to a load end or charging an energy storage battery pack according to the serial voltage data, performing inversion control on an inverter when the power supply is used for supplying power to the load end, and performing charging control on the energy storage battery pack when the power supply is used for charging the energy storage battery pack; therefore, the classification of the retired batteries can be realized, the residual electric quantity of the retired batteries is recycled according to the serial voltage of serial connection of the retired batteries with different classifications, and the waste of the residual electric energy in the retired batteries is reduced.
In a second embodiment, referring to fig. 2, fig. 2 is a schematic structural diagram of a feedback power transmission status control device for retired battery according to an embodiment of the present invention.
As shown in fig. 2, a feedback power transmission state control device of a retired battery is applied to a power feedback device, wherein the power feedback device comprises a feedback control device, a retired battery serial slot, an inverter and an energy storage battery pack;
In the implementation process of the invention, the electric energy feedback equipment at least comprises feedback control equipment, a retired battery serial slot, an inverter and an energy storage battery pack, wherein the feedback control equipment is in signal connection with the retired battery serial slot, the inverter and the energy storage battery pack; wherein the retired battery serial slot is connected with the inverter and the energy storage battery pack through a direct current bus, the output end of the inverter is connected with a micro-grid, and a load end is arranged on the micro-grid; an LC filter is provided between the inverter and the microgrid.
The device comprises:
Classification module 21: the method comprises the steps of classifying a plurality of retired batteries according to current battery voltage data and current battery capacity data to obtain classified retired battery packs with consistent battery voltage data and battery capacity data;
Specifically, the classifying processing is performed on a plurality of retired batteries according to current battery voltage data and current battery capacity data to obtain classified retired battery packs with consistent battery voltage data and battery capacity data, including: detecting the current battery voltage and the current battery capacity of each of the plurality of retired batteries respectively to obtain current battery voltage data and current battery capacity data of each of the plurality of retired batteries; and classifying the retired battery with the same current battery voltage data and the same current battery capacity data to obtain a classified retired battery pack with the same battery voltage data and the same battery capacity data.
Specifically, each of a plurality of retired batteries in a warehouse is numbered firstly, then the voltage and the capacity of each of the numbered retired batteries are measured, and the current battery voltage data and the current battery capacity data of each of the plurality of retired batteries can be obtained; and comparing and binding the battery voltage data with the serial numbers of the battery voltage data, and classifying the retired battery corresponding to the uniform serial numbers of the current battery voltage data and the current battery capacity data in a classification mode to obtain the classified retired battery pack with the uniform battery voltage data and the uniform battery capacity data. By classifying according to the voltage data and the capacity data, it is possible to realize that when the retired batteries are connected in series, the voltage data and the capacity data of the retired batteries connected in series are substantially identical; the probability of thermal runaway of the retired battery in the discharging process can be reduced, meanwhile, the rapid attenuation of one battery in series connection can be reduced, so that the discharging efficiency of other retired batteries in series connection is reduced, and the discharging synchronization cannot be realized.
Voltage acquisition module 22: the method comprises the steps of selecting a plurality of retired batteries from the same classified retired battery pack to be connected in series in a retired battery serial groove, and obtaining serial voltage data at two ends of the retired battery serial groove in real time;
In the implementation process of the invention, the method for selecting a plurality of retired batteries from the same classified retired battery pack to be connected in series in the retired battery serial groove and obtaining the serial voltage data at two ends of the retired battery serial groove in real time comprises the following steps: selecting a corresponding number of retired batteries in the same classified retired battery pack according to the number of the retired battery serial grooves, and arranging the selected retired batteries in the retired battery serial grooves in series; and the feedback control equipment controls the voltage acquisition equipment arranged on the retired battery serial groove to acquire and process the serial voltage data at the two ends of the retired battery serial groove in real time, so as to obtain the serial voltage data at the two ends of the retired battery serial groove.
Specifically, a corresponding number of retired batteries are selected from the same classified retired battery pack according to the number of the retired battery serial grooves, and the selected retired batteries are arranged in the retired battery serial grooves in series according to the positive and negative directions of the retired battery serial grooves; the method comprises the steps that voltage acquisition equipment is arranged on a retired battery serial groove, and then feedback control equipment controls the voltage acquisition equipment arranged on the retired battery serial groove to acquire and process serial voltage data at two ends of the retired battery serial groove in real time, so that the serial voltage data at two ends of the retired battery serial groove are obtained; the voltage acquisition is performed in real time, namely, the voltage acquisition is realized by setting the corresponding acquisition frequency of the voltage acquisition equipment; the method has the advantages that the series voltage data are collected, so that the electric energy generated by the series retired batteries in the retired battery series groove can be conveniently judged to be used for micro-grid power supply or energy storage battery pack charging.
The judgment module 23: the method comprises the steps of judging that a plurality of retired batteries connected in series in a retired battery serial groove are used for supplying power to a load end of a micro-grid or used for charging an energy storage battery pack based on the serial voltage data;
In the implementation process of the invention, the determining, based on the series voltage data, that the plurality of retired batteries connected in series in the retired battery serial slot are used for power supply of a load end of a micro-grid or for charging of an energy storage battery pack includes: comparing the serial voltage data with set voltage data, and judging that a plurality of retired batteries connected in series in the retired battery serial groove are used for supplying power to a load end of a micro-grid or for charging an energy storage battery pack according to a comparison result; when the comparison result is that the serial voltage data is greater than or equal to the set voltage data, judging that a plurality of retired batteries connected in series in the retired battery serial groove are used for supplying power to a load end of the micro-grid; and when the comparison result is that the series voltage data is smaller than the set voltage data, judging that a plurality of retired batteries connected in series in the retired battery series groove are used for charging the energy storage battery pack.
Specifically, after series voltage data are obtained, comparing the series voltage data with set voltage data, and judging that a plurality of retired batteries connected in series in the retired battery serial groove are used for supplying power to a load end of a micro-grid or for charging an energy storage battery pack according to a comparison result; the voltage cannot be lower than a certain voltage value because of the voltage requirement on the micro-grid; setting the preset voltage data to be the lowest voltage value required by the micro-grid power supply; when the comparison result is that the serial voltage data is greater than or equal to the set voltage data, judging that a plurality of retired batteries connected in series in the retired battery serial groove are used for supplying power to a load end of the micro-grid; and when the comparison result is that the series voltage data is smaller than the set voltage data, judging that a plurality of retired batteries connected in series in the retired battery series groove are used for charging the energy storage battery pack.
The inversion control module 24: when a plurality of retired batteries connected in series in the retired battery serial groove are used for supplying power to the load end of the micro-grid, the feedback control equipment performs inversion control on the inverter based on the load parameters of the load end of the micro-grid;
in the implementation process of the invention, the feedback control device performs inversion control on the inverter based on the load parameter of the load end of the micro-grid, and the feedback control device comprises: the feedback control equipment obtains target parameters of an output end corresponding to the inverter, wherein the target parameters comprise an inductor current arranged at the output end, an inverter output voltage, an input voltage of an LC filter arranged at the output end, a filter inductance, a filter capacitance and a radius of the LC filter; and the feedback control equipment generates a control signal according to the target parameter and performs inversion control on the inverter based on the control signal.
Further, the feedback control device generates a control signal according to the target parameter, and performs inversion control on the inverter based on the control signal, including: the feedback control equipment constructs a constraint control model according to the target parameters, wherein the constraint control model is used for constraining the output quantity and limiting all closed-loop signals; converting the constraint control model into an equivalent constraint control model based on an error transformation method; constructing a virtual control model by utilizing a Lyapunov function according to error values of actual output parameters and expected output parameters in the equivalent constraint control model, and generating a control signal based on the virtual control model; the feedback control device performs inversion control on the inverter based on the control signal.
Specifically, the feedback control device needs to obtain target parameters of an output end corresponding to the inverter, where the target parameters include an inductor current set at the output end, an output voltage of the inverter, an input voltage of an LC filter set at the output end, a filter inductance, a filter capacitance, a radius of the LC filter, and the like; the feedback control device then generates a control signal according to the target parameter, and performs inversion control on the inverter through the control signal.
In the process of producing control signals, the feedback control equipment firstly builds a constraint control model according to target parameters, wherein the constraint control model is used for constraining output quantity and limiting all closed-loop signals; wherein the constraint control model is as follows:
；
Assume that As state variables, there are；
Wherein,；；；；
Wherein,Representing the voltage input to the inverter; An inductor current at the output; Is an unknown current on the load side; the voltage output by the inverter is the input voltage of the LC filter; Is a filter inductance; Is a filter capacitor; is the radius of the LC filter.
Then converting the constraint control model into an equivalent constraint control model through an error transformation algorithm; and constructing a virtual control model by utilizing the Lyapunov function according to the error values of the actual output parameters and the expected output parameters in the equivalent constraint control model.
Wherein, parameter variables are needed to represent error values of actual output parameters and expected output parameters in the equivalent constraint control model; wherein the parameter variables are:
;
Wherein, In order to track the error in the tracking,Is the upper and lower bounds of tracking error;
The tracking error is then defined as:
；
Is that The ideal output expectations of the tracking; at this time, the process is performed,The range of (2) is as follows:
；
Wherein, ；；
Wherein the tracking error is constrained using a mapping functionAnd transforming into new variables：
；
When combining the beam control model, there are:
；
Wherein, Is thatThe parameter derivation of the parameter is obtained,；；；Is thatIs a derivative of (2); For inputting the voltage of the micro-grid, i.e. ；Is the voltage output by the inverter.
In constructing a virtual control model by using a Lyapunov function, firstly, a non-adaptive virtual controller is constructed as follows:
；
the construction of the non-self-adaptive actual controller is as follows:
;
Wherein, Is thatIs set to the desired output expected value;、、 are all positive controller parameters; And outputting results for the virtual control model.
The control signal can be generated through the constructed quasi-control model, and then the feedback control equipment performs inversion control on the inverter according to the control signal.
The charge control module 25: when the plurality of retired batteries connected in series in the retired battery serial groove are used for charging the energy storage battery pack, the feedback control equipment starts a charging program to control the plurality of retired batteries connected in series in the retired battery serial groove to charge and control the energy storage battery pack.
In the implementation process of the invention, the controlling the plurality of retired batteries connected in series in the retired battery serial groove to charge the energy storage battery pack comprises the following steps: and controlling a plurality of retired batteries connected in series in the retired battery serial groove to charge and control the energy storage battery pack according to a DC/DC mathematical model according to the serial voltage data.
Specifically, the DC/DC mathematical model in the scheme uses series voltage data as charging voltage for the energy storage battery pack, and then controls a plurality of retired batteries connected in series in the retired battery serial groove to perform equalizing charge control on the energy storage battery pack by using the same charging current of each energy storage battery.
In the embodiment of the invention, classification processing is carried out according to the current battery voltage data and the current battery capacity data of the retired batteries, and then a plurality of retired batteries in the same classified retired battery pack are connected in series in a retired battery serial groove, so that serial voltage data are obtained; judging whether the power supply is used for supplying power to a load end or charging an energy storage battery pack according to the serial voltage data, performing inversion control on an inverter when the power supply is used for supplying power to the load end, and performing charging control on the energy storage battery pack when the power supply is used for charging the energy storage battery pack; therefore, the classification of the retired batteries can be realized, the residual electric quantity of the retired batteries is recycled according to the serial voltage of serial connection of the retired batteries with different classifications, and the waste of the residual electric energy in the retired batteries is reduced.
An embodiment of the present invention provides a computer readable storage medium, where a computer program is stored, where the program when executed by a processor implements the feedback power delivery status control method of any one of the foregoing embodiments. The computer readable storage medium includes, but is not limited to, any type of disk including floppy disks, hard disks, optical disks, CD-ROMs, and magneto-optical disks, ROMs (Read-Only memories), RAMs (Random AcceSS Memory, random access memories), EPROMs (EraSable Programmable Read-Only memories), EEPROMs (ELECTRICALLY ERASABLE PROGRAMMABLEREAD-Only memories), flash memories, magnetic cards, or optical cards. That is, a storage device includes any medium that stores or transmits information in a form readable by a device (e.g., computer, cell phone), and may be read-only memory, magnetic or optical disk, etc.
The embodiment of the invention also provides a computer application program which runs on a computer and is used for executing the feedback electric energy transmission state control method of any one of the embodiments.
In addition, fig. 3 is a schematic structural diagram of a feedback control device according to an embodiment of the present invention.
The embodiment of the invention also provides feedback control equipment, as shown in fig. 3. The feedback control device includes a processor 302, a memory 303, an input unit 304, a display unit 305, and the like. Those skilled in the art will appreciate that the feedback control device structural elements shown in fig. 3 do not constitute a limitation on all devices, and may include more or fewer components than shown, or may combine certain components. The memory 303 may be used to store an application 301 and various functional modules, and the processor 302 runs the application 301 stored in the memory 303, thereby performing various functional applications of the device and data processing. The memory may be internal memory or external memory, or include both internal memory and external memory. The internal memory may include read-only memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), flash memory, or random access memory. The external memory may include a hard disk, floppy disk, ZIP disk, U-disk, tape, etc. The disclosed memory includes, but is not limited to, these types of memory. The memory disclosed herein is by way of example only and not by way of limitation.
The input unit 304 is used for receiving input of a signal and receiving keywords input by a user. The input unit 304 may include a touch panel and other input devices. The touch panel may collect touch operations on or near the user (e.g., the user's operation on or near the touch panel using any suitable object or accessory such as a finger, stylus, etc.), and drive the corresponding connection device according to a preset program; other input devices may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., play control keys, switch keys, etc.), a trackball, mouse, joystick, etc. The display unit 305 may be used to display information input by a user or information provided to the user and various menus of the terminal device. The display unit 305 may take the form of a liquid crystal display, an organic light emitting diode, or the like. The processor 302 is a control center of the terminal device, connects various parts of the entire device using various interfaces and lines, performs various functions and processes data by running or executing software programs and/or modules stored in the memory 303, and invoking data stored in the memory.
As one embodiment, the feedback control device includes: the system comprises one or more processors 302, a memory 303, one or more application programs 301, wherein the one or more application programs 301 are stored in the memory 303 and configured to be executed by the one or more processors 302, and the one or more application programs 301 are configured to perform the feedback power delivery state control method in any of the above embodiments.
In the embodiment of the invention, classification processing is carried out according to the current battery voltage data and the current battery capacity data of the retired batteries, and then a plurality of retired batteries in the same classified retired battery pack are connected in series in a retired battery serial groove, so that serial voltage data are obtained; judging whether the power supply is used for supplying power to a load end or charging an energy storage battery pack according to the serial voltage data, performing inversion control on an inverter when the power supply is used for supplying power to the load end, and performing charging control on the energy storage battery pack when the power supply is used for charging the energy storage battery pack; therefore, the classification of the retired batteries can be realized, the residual electric quantity of the retired batteries is recycled according to the serial voltage of serial connection of the retired batteries with different classifications, and the waste of the residual electric energy in the retired batteries is reduced.
In addition, the feedback electric energy transmission state control method and related device of the retired battery provided by the embodiment of the invention are described in detail, and specific examples are adopted to illustrate the principle and implementation of the invention, and the description of the above embodiments is only used for helping to understand the method and core ideas of the invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (7)
1. The feedback electric energy transmission state control method of the retired battery is characterized by being applied to electric energy feedback equipment, wherein the electric energy feedback equipment comprises feedback control equipment, a retired battery serial slot, an inverter and an energy storage battery pack; the method comprises the following steps:
Classifying the plurality of retired batteries according to the current battery voltage data and the current battery capacity data to obtain classified retired battery packs with consistent battery voltage data and battery capacity data;
selecting a plurality of retired batteries from the same classified retired battery pack to be connected in series in a retired battery serial groove, and obtaining serial voltage data at two ends of the retired battery serial groove in real time;
judging that a plurality of retired batteries connected in series in the retired battery serial groove are used for supplying power to a load end of a micro-grid or used for charging an energy storage battery pack based on the serial voltage data;
When a plurality of retired batteries connected in series in the retired battery serial groove are used for supplying power to the load end of the micro-grid, the feedback control equipment performs inversion control on the inverter based on the load parameters of the load end of the micro-grid;
When a plurality of retired batteries connected in series in the retired battery serial groove are used for charging an energy storage battery pack, the feedback control equipment starts a charging program and controls the plurality of retired batteries connected in series in the retired battery serial groove to charge and control the energy storage battery pack;
the determining, based on the series voltage data, that the plurality of retired batteries connected in series in the retired battery serial slot are used for power supply of a load end of a micro-grid or for charging of an energy storage battery pack includes:
Comparing the serial voltage data with set voltage data, and judging that a plurality of retired batteries connected in series in the retired battery serial groove are used for supplying power to a load end of a micro-grid or for charging an energy storage battery pack according to a comparison result;
When the comparison result is that the serial voltage data is greater than or equal to the set voltage data, judging that a plurality of retired batteries connected in series in the retired battery serial groove are used for supplying power to a load end of the micro-grid;
When the comparison result is that the serial voltage data is smaller than the set voltage data, judging that a plurality of retired batteries connected in series in the retired battery serial groove are used for charging the energy storage battery pack;
The feedback control device performs inversion control on the inverter based on the load parameter of the load end of the micro-grid, and the feedback control device comprises:
The feedback control equipment obtains target parameters of an output end corresponding to the inverter, wherein the target parameters comprise an inductor current arranged at the output end, an inverter output voltage, an input voltage of an LC filter arranged at the output end, a filter inductance, a filter capacitance and a radius of the LC filter;
The feedback control equipment generates a control signal according to the target parameter and performs inversion control on the inverter based on the control signal;
The feedback control device generates a control signal according to the target parameter, and performs inversion control on the inverter based on the control signal, including:
The feedback control equipment constructs a constraint control model according to the target parameters, wherein the constraint control model is used for constraining the output quantity and limiting all closed-loop signals;
converting the constraint control model into an equivalent constraint control model based on an error transformation method;
Constructing a virtual control model by utilizing a Lyapunov function according to error values of actual output parameters and expected output parameters in the equivalent constraint control model, and generating a control signal based on the virtual control model;
the feedback control device performs inversion control on the inverter based on the control signal.
2. The feedback power delivery status control method of claim 1, wherein the classifying the plurality of retired batteries according to the current battery voltage data and the current battery capacity data to obtain a classified retired battery pack with consistent battery voltage data and battery capacity data, comprises:
Detecting the current battery voltage and the current battery capacity of each of the plurality of retired batteries respectively to obtain current battery voltage data and current battery capacity data of each of the plurality of retired batteries;
and classifying the retired battery with the same current battery voltage data and the same current battery capacity data to obtain a classified retired battery pack with the same battery voltage data and the same battery capacity data.
3. The feedback power transmission state control method according to claim 1, wherein the selecting a plurality of retired batteries from the same classified retired battery pack to be serially connected in the retired battery serial slot, and obtaining serial voltage data at two ends of the retired battery serial slot in real time, includes:
selecting a corresponding number of retired batteries in the same classified retired battery pack according to the number of the retired battery serial grooves, and arranging the selected retired batteries in the retired battery serial grooves in series;
And the feedback control equipment controls the voltage acquisition equipment arranged on the retired battery serial groove to acquire and process the serial voltage data at the two ends of the retired battery serial groove in real time, so as to obtain the serial voltage data at the two ends of the retired battery serial groove.
4. The feedback power delivery status control method of claim 1, wherein the controlling the plurality of retired batteries connected in series in the retired battery serial slot to charge the energy storage battery pack comprises:
And controlling a plurality of retired batteries connected in series in the retired battery serial groove to charge and control the energy storage battery pack according to a DC/DC mathematical model according to the serial voltage data.
5. The feedback electric energy transmission state control device of the retired battery is characterized by being applied to electric energy feedback equipment, wherein the electric energy feedback equipment comprises feedback control equipment, a retired battery serial slot, an inverter and an energy storage battery pack; the device comprises:
And a classification module: the method comprises the steps of classifying a plurality of retired batteries according to current battery voltage data and current battery capacity data to obtain classified retired battery packs with consistent battery voltage data and battery capacity data;
the voltage acquisition module: the method comprises the steps of selecting a plurality of retired batteries from the same classified retired battery pack to be connected in series in a retired battery serial groove, and obtaining serial voltage data at two ends of the retired battery serial groove in real time;
and a judging module: the method comprises the steps of judging that a plurality of retired batteries connected in series in a retired battery serial groove are used for supplying power to a load end of a micro-grid or used for charging an energy storage battery pack based on the serial voltage data;
The inversion control module: when a plurality of retired batteries connected in series in the retired battery serial groove are used for supplying power to the load end of the micro-grid, the feedback control equipment performs inversion control on the inverter based on the load parameters of the load end of the micro-grid;
And a charging control module: when the plurality of retired batteries connected in series in the retired battery serial groove are used for charging the energy storage battery pack, the feedback control equipment starts a charging program and controls the plurality of retired batteries connected in series in the retired battery serial groove to charge and control the energy storage battery pack;
the determining, based on the series voltage data, that the plurality of retired batteries connected in series in the retired battery serial slot are used for power supply of a load end of a micro-grid or for charging of an energy storage battery pack includes:
Comparing the serial voltage data with set voltage data, and judging that a plurality of retired batteries connected in series in the retired battery serial groove are used for supplying power to a load end of a micro-grid or for charging an energy storage battery pack according to a comparison result;
When the comparison result is that the serial voltage data is greater than or equal to the set voltage data, judging that a plurality of retired batteries connected in series in the retired battery serial groove are used for supplying power to a load end of the micro-grid;
When the comparison result is that the serial voltage data is smaller than the set voltage data, judging that a plurality of retired batteries connected in series in the retired battery serial groove are used for charging the energy storage battery pack;
The feedback control device performs inversion control on the inverter based on the load parameter of the load end of the micro-grid, and the feedback control device comprises:
The feedback control equipment obtains target parameters of an output end corresponding to the inverter, wherein the target parameters comprise an inductor current arranged at the output end, an inverter output voltage, an input voltage of an LC filter arranged at the output end, a filter inductance, a filter capacitance and a radius of the LC filter;
The feedback control equipment generates a control signal according to the target parameter and performs inversion control on the inverter based on the control signal;
The feedback control device generates a control signal according to the target parameter, and performs inversion control on the inverter based on the control signal, including:
The feedback control equipment constructs a constraint control model according to the target parameters, wherein the constraint control model is used for constraining the output quantity and limiting all closed-loop signals;
converting the constraint control model into an equivalent constraint control model based on an error transformation method;
Constructing a virtual control model by utilizing a Lyapunov function according to error values of actual output parameters and expected output parameters in the equivalent constraint control model, and generating a control signal based on the virtual control model;
the feedback control device performs inversion control on the inverter based on the control signal.
6. A computer-readable storage medium having stored thereon a computer program, which when executed by a processor implements the feedback power delivery state control method as claimed in any one of claims 1 to 4.
7. A feedback control apparatus, characterized in that the feedback control apparatus comprises:
One or more processors;
A memory;
one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the one or more processors, the one or more applications configured to: the feedback electric power delivery state control method according to any one of claims 1 to 4 is performed.
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| CN114583734A (en) * | 2022-03-15 | 2022-06-03 | 华电内蒙古能源有限公司 | Multi-type energy storage system energy management method, system, device and storage medium |
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| CN114583734A (en) * | 2022-03-15 | 2022-06-03 | 华电内蒙古能源有限公司 | Multi-type energy storage system energy management method, system, device and storage medium |
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