CN116388346B - Battery discharge management method of large energy storage power station, storage medium and electronic equipment - Google Patents
Battery discharge management method of large energy storage power station, storage medium and electronic equipment Download PDFInfo
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- 238000004146 energy storage Methods 0.000 title claims abstract description 44
- 238000007726 management method Methods 0.000 title claims abstract description 27
- 238000007599 discharging Methods 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims description 47
- 230000006870 function Effects 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 16
- 238000012216 screening Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
- 230000004044 response Effects 0.000 abstract description 4
- 230000007246 mechanism Effects 0.000 abstract description 3
- 230000010485 coping Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 11
- 238000004590 computer program Methods 0.000 description 8
- 238000012545 processing Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
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- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005055 memory storage Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
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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
-
- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
-
- 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
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/10—Batteries in stationary systems, e.g. emergency power source in plant
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- 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)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The application relates to a battery discharge management method, a storage medium and electronic equipment of a large-scale energy storage power station; comprises judging whether the battery box unit is in a discharging state; if the battery box unit is in a discharging state, acquiring the charge and discharge cycle times of all battery boxes in the battery box unit; and an access mechanism to the redundant battery box is established by using the charge-discharge cycle times. According to the application, the influence of the charge and discharge cycle times on the consistency of the battery is fully considered, the rapid response and the coping of faults in the battery box unit are realized, and the condition of inconsistent internal resistances of the redundant battery boxes is effectively avoided; the popularization and application of the energy storage power station are facilitated.
Description
Technical Field
The application relates to the field of power management, in particular to a battery discharge management method, a storage medium and electronic equipment of a large-scale energy storage power station.
Background
In a large-scale energy storage power station, a battery box is used as common energy storage equipment, and a large-capacity large-scale energy storage system is built by means of series connection and parallel connection; with the charge and discharge operation process of the system, faults are generated, particularly on the serial communication paths of a plurality of battery boxes, and the faults of a single battery box can cause that the whole path (battery unit) cannot be connected to the whole system.
The digital energy storage module recorded in 202010839778.7 has the advantages that when the battery modules are in fault, the bypass circuit is connected with each battery module, so that the fault battery module can be bypassed, and the energy storage module system can continue to operate normally and efficiently. While the above approach can ensure that the series path is still operational, it requires a reduction in output power while causing some power ripple.
The power lithium battery management system based on the N/M redundancy balancing strategy in 201410387929.4 adopts the strategy and the mode based on the N/M redundancy balancing, M (M is less than or equal to N) single batteries are additionally connected in series in a battery pack containing N single batteries (used as balancing batteries), and the purpose of replacing the single batteries with excessively high (low) voltage and the fault batteries in the battery charging (discharging) process is achieved through the on and off of a switching tube in a control circuit, so that the balanced charging and discharging of the battery pack are actively achieved. Although the above-mentioned mode can avoid reducing output power, it utilizes extra equalization device or equalization circuit to make equalization of voltage and electric quantity on redundant battery and then connect the faulty serial-connection channel, although electric quantity and voltage can meet the connection requirement through equalization, redundant battery and battery of normal charge-discharge work can lead to electric quantity SOC, internal resistance R, consistency of voltage V relatively poor because of the circulation number difference, it is the unstable factor of buried in later operation.
The present application aims to solve the above-mentioned problems.
Disclosure of Invention
To achieve the above and other advantages and in accordance with the purpose of the present application, a first object of the present application is to provide a battery discharge management method of a large-sized energy storage power station, comprising the steps of:
acquiring state information of an energy storage power station, and analyzing to obtain first information representing the charge and discharge states of a battery box unit of the energy storage power station;
judging whether the first information is in a discharging state or not according to the first information;
if the battery box unit is in a discharging state, the charge and discharge cycle times of all the battery boxes in the battery box unit are obtained, and a first set P1{ T } is obtained 1 ，T 2 ，……T i ，……T n+k -a }; wherein T is i The charge and discharge cycle times of the ith battery box; i=1, 2, … … n+k, n+k being the number of battery boxes in the battery box unit, k being the number of redundant battery boxes in the battery box unit;
acquiring the first set P1{ T } 1 ，T 2 ，……T i ，……T n+k The minimum k charge-discharge cycle times among the } and correspondingly obtain the battery box (B) with the minimum k charge-discharge cycle times 1 ，B 2 ，……B k ) Denoted as a second set P2{ B ] 1 ，B 2 ，……B k };
Based on the second set P2, the battery boxes excluding the second set P2 in the battery box unit are obtained and marked as a third set P3{ B k+1 ，B k+2 ，……B n+k }；
Acquiring a third set P3{ B k+1 ，B k+2 ，……B n+k In the third set P3{ B } k+1 ，B k+2 ，……B n+k Select n-k electricityPool box and with second set P2{ B 1 ，B 2 ，……B k Combining to obtain a fourth set P4{ B } 1 ，B 2 ，……B k ，……B n Wherein n is greater than k;
according to the fourth set P4{ B 1 ，B 2 ，……B k ，……B n Obtaining second information of the battery boxes which are required by the battery box unit to execute the current discharge, and configuring a serial passage of each battery box in the battery box unit according to the second information and executing the current discharge.
In a preferred embodiment, the third set P3{ B k+1 ，B k+2 ，……B n+k N-k battery boxes are selected, and the method specifically comprises the following steps:
in a third set P3{ B according to a random function k+1 ，B k+2 ，……B n+k N-k battery boxes are selected.
In a preferred embodiment, the third set P3{ B k+1 ，B k+2 ，……B n+k N-k battery boxes are selected, and the method specifically comprises the following steps:
obtaining maximum and minimum values of charge and discharge cycle times in a third set P3;
judging whether the difference value between the maximum value and the minimum value is larger than a first threshold value or not;
if the number of the battery boxes is larger than the number of the battery boxes, selecting n-k battery boxes from small to large according to the number of charge and discharge cycles;
if less than or equal to the third set P3{ B } according to the random function k+1 ，B k+2 ，……B n+k N-k battery boxes are selected.
In a preferred embodiment, the discharging process further includes the steps of:
acquiring a fourth set P4{ B 1 ，B 2 ，……B k ，……B n Status information of each battery box in the box and is marked as third information;
judging whether the third information has a fault battery box B e The method comprises the steps of carrying out a first treatment on the surface of the Wherein e=1, 2, … … n;
if there is a faulty battery box, the current k redundant battery boxes (B ’ n+1 ，B ’ n+2 ，……B ’ n+k ) Formed set Pr { B ’ n+1 ，B ’ n+2 ，……B ’ n+k One of the battery boxes B ’ c Performing replacement of the faulty battery box to obtain a fifth set P5{ B } 1 ，B 2 ，……B ’ c ，……B n -a }; where c=n+1, n+2, … … n+k.
In a preferred embodiment, the battery box B ’ c Screening is carried out by the following steps:
obtaining a fault battery box B e The charge and discharge cycle times of each battery box in the redundant battery box set Pr;
charging and discharging cycle times of each battery box in the redundant battery box set Pr and the fault battery box B e The charge and discharge cycle times are matched to obtain a battery box with the minimum charge and discharge cycle times difference, namely the battery box B ’ c 。
In a preferred embodiment, before replacing the faulty battery box, the method further comprises the steps of:
acquiring a fourth set P4{ B 1 ，B 2 ，……B k ，……B n The electric quantity and voltage of the battery box without faults in the process;
equalizing battery box B according to electric quantity and voltage of non-fault battery box ’ c Is a function of the power and voltage of the battery.
In a preferred embodiment, the battery box B is balanced ’ c The electric quantity and voltage of the power supply system specifically comprise the following steps:
opening the battery box B ’ c An electrical load for the self-equipment;
judging battery box B ’ c Whether the electric quantity and the voltage of the non-fault battery box meet the electric quantity and the voltage of the non-fault battery box or not;
if so, the equalization is completed.
In a preferred embodiment, after the current discharge is performed, the method further includes the steps of:
determine the fourth set P4{ B 1 ，B 2 ，……B k ，……B n Whether the average electric quantity of each battery box in the battery box is larger than a second threshold value;
if the average electric quantity is less than or equal to the second threshold value, for the fourth set P4{ B 1 ，B 2 ，……B k ，……B n The fourth set P4 is released after the charge and discharge cycle times of each battery box are added with 1;
and if the average electric quantity is larger than the second threshold value, configuring a serial passage of each battery box in the battery box unit according to the second information and executing the next discharging.
A second object of the present application is to provide a computer readable storage medium having stored thereon program instructions that when executed implement a battery discharge management method for a large energy storage power station.
A third object of the present application is to provide an electronic apparatus including: a processor and a memory for storing one or more programs; and when the one or more programs are executed by the processor, implementing a battery discharge management method for a large energy storage power station.
Compared with the prior art, the application has the beneficial effects that:
the application relates to a battery discharge management method of a large-scale energy storage power station; comprises judging whether the battery box unit is in a discharging state; if the battery box unit is in a discharging state, acquiring the charge and discharge cycle times of all battery boxes in the battery box unit; and an access mechanism to the redundant battery box is established by using the charge-discharge cycle times. The application also relates to a storage medium and an electronic device. According to the application, the influence of the charge and discharge cycle times on the consistency of the battery is fully considered, the rapid response and the coping of faults in the battery box unit are realized, and the condition of inconsistent internal resistances of the redundant battery boxes is effectively avoided; the popularization and application of the energy storage power station are facilitated.
The foregoing description is only an overview of the present application, and is intended to provide a better understanding of the present application, as it is embodied in the following description, with reference to the preferred embodiments of the present application and the accompanying drawings. Specific embodiments of the present application are given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a schematic flow chart of a method for managing battery discharge of a large-scale energy storage power station in embodiment 1;
FIG. 2 is a schematic diagram of a battery discharge management method of the large-scale energy storage power station in embodiment 1;
FIG. 3 is a flowchart of a battery discharge management method of the large-scale energy storage power station in the embodiment 1;
FIG. 4 is a flowchart of a battery discharge management method of the large-scale energy storage power station in the embodiment 1;
FIG. 5 is a flowchart of a battery discharge management method of the large-scale energy storage power station in embodiment 1;
FIG. 6 is a flowchart of a battery discharge management method of the large-scale energy storage power station in the embodiment 1;
FIG. 7 is a flow chart of a battery discharge management method of the large-scale energy storage power station in the embodiment 1;
FIG. 8 is a schematic diagram of the electronic device in example 2;
FIG. 9 is a schematic diagram of the electrified construction of the execution unit of the present application;
fig. 10 is a schematic diagram of a circuit configuration of the battery box withdrawal series circuit of the present application;
FIG. 11 is a schematic diagram of a circuit configuration of an energy storage power station for implementing the battery discharge management method of the present application.
Detailed Description
The present application will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.
In the following description, suffixes such as "module", "component", or "unit" for representing elements are used only for facilitating the description of the present application, and have no specific meaning per se. Thus, "module," "component," or "unit" may be used in combination.
In the application of large-scale energy storage power stations, the actual design is based on. The energy storage power station comprises a plurality of energy storage containers, and a plurality of battery clusters are connected in parallel in the energy storage containers; a plurality of battery box units are connected in parallel in the battery cluster; a plurality of battery boxes are connected in series in the battery box unit; in the application, redundant battery boxes are arranged in the battery box unit, particularly, when discharging, the output voltage is constant, the number of the battery boxes in series is relatively constant, and the redundant battery boxes exit from the series passage through the bypass circuit and are not connected into the series passage; in some embodiments, as shown in fig. 9-11, the execution unit is used as a switching device of a battery box access serial connection passage, and comprises two switching circuits controlled by relays, and when the battery box is accessed, as shown in fig. 9, the relays KM1 and KM2 control normally closed contacts connected with the anode and the cathode of the battery box to be closed; when the relays KM1, KM2 control the normally closed contacts connecting the anode and cathode of the battery box to be opened and the normally open contacts to be closed, the battery box (such as a fault or when being used as a redundant battery box) is withdrawn from the current series path.
As shown in fig. 10, a relay KM2-1 in the actuator A2 controls the normally closed contact to be on (normally open contact to be off), and the relay KM2-2 controls the normally closed contact to be off (normally open contact to be on); a relay KM3-1 in the execution unit A3 controls the normally open contact to be switched on (normally closed contact to be switched off), and a relay KM3-2 controls the normally open contact to be switched off (normally closed contact to be switched on); at this time, battery box B 2 Exit the series path. As shown in fig. 11, the control unit is connected with and controls n+k execution units, and the corresponding battery boxes are controlled to be connected with or withdrawn from the serial channels through the execution units; as shown in fig. 11, battery box B n+k The serial path is not accessed. In this embodiment, the state information and the charge and discharge cycle times of the battery box are collected and stored by the BMS battery management system, and the control of the access and the exit is implemented by the control unit, so that the balance and consistency in the battery box unit are achieved.
The following examples are provided to illustrate the application in more detail.
Example 1
As shown in fig. 1, the battery discharge management method of the large energy storage power station comprises the following steps:
s101, acquiring state information of an energy storage power station, and analyzing to obtain first information representing the charge and discharge states of a battery box unit of the energy storage power station;
s102, judging whether the first information is in a discharging state or not according to the first information;
in this embodiment, state information of the energy storage power station is obtained through the BMS battery management system, and the current system is judged to be in a charging state or a discharging state or a silence state; it should be understood that the large-scale energy storage power station or the large-scale power station configured for photovoltaic power generation, wind and light integration and the like is used as energy storage equipment, and the energy storage power station can be configured with a plurality of battery box units according to the design capacity requirement and the power generation rule of the power station, and can be respectively charged, and the plurality of battery box units can be configured for discharging according to the power consumption requirement; when the battery box unit is configured to perform discharging, the control unit starts to configure each execution unit to access the battery box.
S103, if the battery box unit is in a discharging state, acquiring the charge and discharge cycle times of all battery boxes in the battery box unit and obtaining a first set P1{ T } 1 ，T 2 ，……T i ，……T n+k -a }; wherein T is i The charge and discharge cycle times of the ith battery box; i=1, 2, … … n+k, n+k being the number of battery boxes in the battery box unit, k being the number of redundant battery boxes in the battery box unit;
s104, acquiring a first set P1{ T } 1 ，T 2 ，……T i ，……T n+k The minimum k charge-discharge cycle times among the } and correspondingly obtain the battery box (B) with the minimum k charge-discharge cycle times 1 ，B 2 ，……B k ) Denoted as a second set P2{ B ] 1 ，B 2 ，……B k };
In some embodiments, when the battery box unit performs charging, the performing unit charges all battery boxes connected in the serial connection path so as to achieve the maximum storage capacitance of the battery box unitAn amount of; when discharging is performed, the number of charge and discharge cycles in the battery box unit is different because part of redundant battery boxes do not provide electric energy output; for example, in the first set P1{994, 991, 992, 1004, 996, 996, 996, 995, 997, 990}, 8 battery boxes need to be connected in series, and the remaining 2 battery boxes are used as redundancy, and T is set during the current discharge execution 2 ，T 10 The corresponding battery boxes form a second set P2{ B } T2 ，B T10 "B", it is noted that T2 ，B T10 To maintain the consistency of the description in the examples, it should not be construed as an obscure or confusion of the present application.
S105, according to the second set P2, acquiring the battery boxes of which the second set P2 is removed from the battery box units, and marking the battery boxes as a third set P3{ B k+1 ，B k+2 ，……B n+k }；
S106, obtaining a third set P3{ B } k+1 ，B k+2 ，……B n+k In the third set P3{ B } k+1 ，B k+2 ，……B n+k Selecting n-k battery boxes from the second set P2{ B }, and 1 ，B 2 ，……B k combining to obtain a fourth set P4{ B } 1 ，B 2 ，……B k ，……B n Wherein n is greater than k;
in the above examples, T will be removed 2 ，T 10 The corresponding battery boxes form a third set P3{ B } T1 ，B T3 ，B T4 ，B T5 ，B T6 ，B T7 ，B T8 ，B T9 -a }; and 6 battery boxes are selected from the third set P3 and the second set P2{ B }, respectively T2 ，B T10 Together, form a fourth set P4; in some embodiments, the third set P3{ B } k+1 ，B k+2 ，……B n+k N-k battery boxes are selected from the third set P3{ B }, according to a random function k+1 ，B k+2 ，……B n+k N-k battery boxes are selected, and the random function can be configured as random (P3 { B) k+1 ，B k+2 ，……B n+k And (3) to sort the random numbers, and taking the first n-k battery boxes as the selected battery boxes.
In other embodiments, to avoid randomly causing excessive deviations in the number of charge and discharge cycles of a single battery box; as shown in FIG. 2, the third set P3{ B k+1 ，B k+2 ，……B n+k N-k battery boxes are selected, and the method specifically comprises the following steps:
s111, obtaining the maximum value and the minimum value of the charge-discharge cycle times in the third set P3;
s112, judging whether the difference value between the maximum value and the minimum value is larger than a first threshold value;
s113, if the number of the battery boxes is larger than the number of the battery boxes, selecting n-k battery boxes from small to large according to the number of charge and discharge cycles;
s114, if less than or equal to the third set P3{ B }, according to the random function k+1 ，B k+2 ，……B n+k N-k battery boxes are selected. In some embodiments, for example, the third set P3{ B } T1 ，B T3 ，B T4 ，B T5 ，B T6 ，B T7 ，B T8 ，B T9 Maximum and minimum values of charge-discharge cycle times are 1004 and 992; in this embodiment, the first threshold may be configured to be 10, that is, when the difference between the number of charge and discharge cycles in the third set P3 does not exceed 10, n-k battery boxes may be selected by adopting a random function manner; when the difference of the charge and discharge cycle times in the third set P3 exceeds 10 times, n-k battery boxes are selected from small to large, in the embodiment, the difference of the maximum value and the minimum value is 1004 and 992 is 12, and the third set P3{ B T1 ，B T3 ，B T4 ，B T5 ，B T6 ，B T7 ，B T8 ，B T9 B is selected from the small charge and discharge cycle times T1 ，B T3 ，B T5 ，B T6 ，B T7 ，B T8 And with the second set P2{ B T2 ，B T10 Combining to obtain P4{ B } T1 ，B T2 ，B T3 ，B T5 ，B T6 ，B T7 ，B T8 ，B T10 }。
In other embodiments, the first threshold value decreases as the average value of the number of charge-discharge cycles of the battery box increases, for example, in the early stage of the battery box, that is, the average value of the number of charge-discharge cycles is 0-400, the first threshold value is configured to be 12, and the battery box consistency is better at this stage; the average value of the charge-discharge cycle times is 401-1200, and the consistency of the battery box is general at the stage, and the first threshold value is configured to be 10; after the average value of the charge and discharge cycle times is 1201, the fault occurrence probability of the battery box is higher at the stage, and the first threshold value is configured to be 6; so as to reduce the gap between the charge and discharge cycles of the battery box.
S107, according to the fourth set P4{ B 1 ，B 2 ，……B k ，……B n Obtaining second information of the battery boxes which are required by the battery box unit to execute the current discharge, and configuring a serial passage of each battery box in the battery box unit according to the second information and executing the current discharge. In this embodiment, as shown in fig. 11, the second information may be generated in the control unit, and a plurality of execution units are configured to access the battery box corresponding to the exit according to the second information. In some embodiments, P4{ B T1 ，B T2 ，B T3 ，B T5 ，B T6 ，B T7 ，B T8 ，B T10 The second information corresponding to the second information is instruction information of the execution units A1, A2, A3, A5, A6, A7, A8 and a10 configured to access the battery box, and instruction information of the execution units A4 and a10 configured to exit the battery box.
In some preferred embodiments, as shown in fig. 3, the present discharging process further includes the steps of:
s121, obtaining a fourth set P4{ B } 1 ，B 2 ，……B k ，……B n Status information of each battery box in the box and is marked as third information;
s122, judging whether the third information has a fault battery box B e The method comprises the steps of carrying out a first treatment on the surface of the Wherein e=1, 2, … … n;
s123, if there is a faulty battery box, the current k redundant battery boxes (B ’ n+1 ，B ’ n+2 ，……B ’ n+k ) Formed set Pr { B ’ n+1 ，B ’ n+2 ，……B ’ n+k One of the battery boxesB ’ c Performing replacement of the faulty battery box to obtain a fifth set P5{ B } 1 ，B 2 ，……B ’ c ，……B n -a }; where c=n+1, n+2, … … n+k. In the present embodiment, the BMS battery management system continuously monitors the fourth set P4{ B }, during the discharging process T1 ，B T2 ，B T3 ，B T5 ，B T6 ，B T7 ，B T8 ，B T10 Third information representing the state of each battery box in the third information, if the third information has a fault battery box B T3 Utilizing the current redundant battery box set Pr { B T4 ，B T9 A battery box in } such as B T9 Replacement of the faulty battery box is performed.
In another preferred embodiment, as shown in FIG. 4, battery box B ’ c Screening is carried out by the following steps:
s131, obtaining a fault battery box B e The charge and discharge cycle times of each battery box in the redundant battery box set Pr;
s132, charging and discharging cycle times of each battery box in the redundant battery box set Pr and the fault battery box B e Matching the charge and discharge cycle times;
s133, the battery box with the minimum difference of the charge and discharge cycle times is the battery box B ’ c . In the present embodiment, the faulty battery box B T3 The number of charge-discharge cycles is 992, and the current redundant battery box set Pr { B }, is utilized T4 ，B T9 The number of charge-discharge cycles in the above-mentioned materials is 1004 and 997 respectively, in which B T9 Corresponding charge-discharge cycle times and fault battery box B T3 The difference between the charge and discharge cycle times is the smallest, namely the redundant battery box B is utilized T9 To replace the fault battery box B T3 And generates control instructions by the control unit to configure the corresponding execution units to access the battery box B T9 And withdraw from the fault battery box B T3 。
In some preferred embodiments, as shown in fig. 5, the redundant battery boxes are further equalized before the failed battery box is replaced, comprising the steps of:
S141、acquiring a fourth set P4{ B 1 ，B 2 ，……B k ，……B n The electric quantity and voltage of the battery box without faults in the process;
s142, balancing the battery box B according to the electric quantity and the voltage of the battery box without faults ’ c Is a function of the power and voltage of the battery.
In some embodiments, the equalization mode can be configured with an additional equalization circuit, and the equalization speed is greatly accelerated due to the similar charge and discharge cycle times, so that the equalization mode can be quickly connected into a serial path of the battery box units, and automatic and quick replacement of the fault battery box is realized.
In some preferred embodiments, as shown in FIG. 6, battery box B is equalized ’ c The electric quantity and voltage of the power supply system specifically comprise the following steps:
s151, opening the battery box B ’ c An electrical load for the self-equipment;
s152, judging battery box B ’ c Whether the electric quantity and the voltage of the non-fault battery box meet the electric quantity and the voltage of the non-fault battery box or not;
and S153, if the balance is satisfied, finishing the balance. In this embodiment, the electrical load of the self-apparatus includes a battery box heating module (such as an electrical heat resistance wire and a PTC heating device) or a heat dissipating module (such as a fan and a liquid cooling device), and the electrical load consumes electrical power to reach the electrical power and voltage of the battery box without failure, and then is connected to the serial path of the battery box unit.
In some preferred embodiments, as shown in fig. 7, after the discharge is performed, the method further includes the steps of:
s161, obtaining a fourth set P4{ B } 1 ，B 2 ，……B k ，……B n Average power of each battery box in the process;
s162, judging the fourth set P4{ B } 1 ，B 2 ，……B k ，……B n Whether the average electric quantity of each battery box in the battery box is larger than a second threshold value;
s163, if the average electric quantity is less than or equal to the second threshold value, for the fourth set P4{ B 1 ，B 2 ，……B k ，……B n Charge-discharge cycle of each battery box in }Releasing the fourth set P4 after adding 1 to the number of loops;
and S164, if the average electric quantity is larger than a second threshold value, configuring a serial passage of each battery box in the battery box unit according to the second information and executing the next discharging. In the present embodiment, whether the battery box unit is consumed in the current discharging process is judged by the second threshold value, for example, the second threshold value is configured to be 20%; if the average electric quantity of each battery box in the fourth set P4 is greater than 20% after the current discharge is performed, the remaining electric quantity is indicated and can be used for the next discharge, and when the next discharge is to be performed, the battery boxes are configured by directly using the second information of the current time. If the average electric quantity of each battery box in the fourth set P4 is less than or equal to 20% after the current discharging is executed, the fact that each battery box in the fourth set P4 cannot continue to supply power is indicated, and only a charging instruction is received next time; for the fourth set P4{ B 1 ，B 2 ，……B k ，……B n And (3) after the charge and discharge cycle times of each battery box are increased by 1, releasing the fourth set P4. It should be noted that, the number of charge-discharge cycles may be counted in step S164; counting can also be performed by a management method of the battery box; it is used only as a description of the process of one complete charge or discharge of the battery case from 0 to 100%; and thus does not cause an unclear technical scheme.
According to the application, by establishing the access mechanism to the redundant battery box, the influence of the charge and discharge cycle times on the consistency of the battery is fully considered, the rapid response and response of faults in the battery box unit are realized, and the condition of inconsistent internal resistance of the redundant battery box is effectively avoided.
Example 2
As shown in fig. 8, an electronic device includes: a processor 23 and a memory 21, the memory 21 for storing one or more programs; when one or more programs are executed by the processor 23, a battery discharge management method for a large energy storage power station as in embodiment 1 is implemented. In this embodiment, the electronic device further includes a communication interface 22 for receiving and transmitting data; bus 24 for communicating data within the electronic device.
Example 3
A computer readable storage medium having stored thereon program instructions that when executed implement the method of battery discharge management for a large energy storage power station of embodiment 1.
From the above description of embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software, or may be implemented in software in combination with the necessary hardware. The technical solution according to the embodiment of the present application may be embodied in the form of a software product, which may be stored in a computer readable storage medium (may be a CD-ROM, a U-disk, a mobile hard disk, etc.) or on a network, and includes a number of computer program instructions to make a computing device (may be a personal computer, a server, or a network device, etc.) execute the above-mentioned method according to the embodiment of the present application.
The number of equipment and the scale of processing described herein are intended to simplify the description of the present application. Applications, modifications and variations of the present application will be readily apparent to those skilled in the art.
Although embodiments of the present application have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the application would be readily apparent to those skilled in the art, and accordingly, the application is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
The apparatus, the electronic device, the nonvolatile computer storage medium and the method provided in the embodiments of the present disclosure correspond to each other, and therefore, the apparatus, the electronic device, the nonvolatile computer storage medium also have similar beneficial technical effects as those of the corresponding method, and since the beneficial technical effects of the method have been described in detail above, the beneficial technical effects of the corresponding apparatus, the electronic device, the nonvolatile computer storage medium are not described here again.
Those skilled in the art will also appreciate that, in addition to implementing the controller in a pure computer readable program code, it is well possible to implement the same functionality by logically programming the method steps such that the controller is in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers, etc. Such a controller may thus be regarded as a kind of hardware component, and means for performing various functions included therein may also be regarded as structures within the hardware component. Or even means for achieving the various functions may be regarded as either software modules implementing the methods or structures within hardware components.
The system, apparatus, module or unit set forth in the above embodiments may be implemented in particular by a computer chip or entity, or by a product having a certain function. One typical implementation is a computer. In particular, the computer may be, for example, a personal computer, a laptop computer, a cellular telephone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.
For convenience of description, the above devices are described as being functionally divided into various units, respectively. Of course, the functionality of the units may be implemented in one or more software and/or hardware when implementing one or more embodiments of the present description.
It will be appreciated by those skilled in the art that the present description may be provided as a method, system, or computer program product. Accordingly, the present specification embodiments may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present description embodiments may take the form of a computer program product on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
The present description is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the specification. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of computer-readable media.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
The description may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The specification may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.
The foregoing description is illustrative of embodiments of the present disclosure and is not to be construed as limiting one or more embodiments of the present disclosure. Various modifications and alterations to one or more embodiments of this description will be apparent to those skilled in the art. Any modifications, equivalent substitutions, improvements, or the like, which are within the spirit and principles of one or more embodiments of the present disclosure, are intended to be included within the scope of the claims of one or more embodiments of the present disclosure. One or more embodiments of the present specification.
Claims (7)
1. The battery discharge management method of the large-scale energy storage power station is characterized by comprising the following steps of:
acquiring state information of an energy storage power station, and analyzing to obtain first information representing the charge and discharge states of a battery box unit of the energy storage power station;
judging whether the first information is in a discharging state or not according to the first information;
if the battery box unit is in a discharging state, the charge and discharge cycle times of all the battery boxes in the battery box unit are obtained, and a first set P1{ T } is obtained 1 ，T 2 ，……T i ，……T n+k -a }; wherein T is i The charge and discharge cycle times of the ith battery box; i=1, 2, … … n+k, n+k being the number of battery boxes in the battery box unit, k being the number of redundant battery boxes in the battery box unit;
acquiring the first set P1{ T } 1 ，T 2 ，……T i ，……T n+k The minimum k charge-discharge cycle times in the }, and correspondingly obtain the battery box B with the minimum k charge-discharge cycle times 1 ，B 2 ，……B k Denoted as a second set P2{ B ] 1 ，B 2 ，……B k };
Based on the second set P2, the battery boxes excluding the second set P2 in the battery box unit are obtained and marked as a third set P3{ B k+1 ，B k+2 ，……B n+k }；
Acquiring a third set P3{ B k+1 ，B k+2 ，……B n+k In the third set P3{ B } k+1 ，B k+2 ，……B n+k Selecting n-k battery boxes from the second set P2{ B }, and 1 ，B 2 ，……B k combining to obtain a fourth set P4{ B } 1 ，B 2 ，……B k ，……B n Wherein n is greater than k;
according to the fourth set P4{ B 1 ，B 2 ，……B k ，……B n Obtaining second information of the battery boxes required by the battery box unit to execute the current discharge, so as to configure a serial passage of each battery box in the battery box unit according to the second information and execute the current discharge;
third set P3{ B k+1 ，B k+2 ，……B n+k N-k battery boxes are selected, and the method specifically comprises the following steps:
obtaining maximum and minimum values of charge and discharge cycle times in a third set P3;
judging whether the difference value between the maximum value and the minimum value is larger than a first threshold value or not;
if the number of the battery boxes is larger than the number of the battery boxes, selecting n-k battery boxes from small to large according to the number of charge and discharge cycles;
if less than or equal to the third set P3{ B } according to the random function k+1 ，B k+2 ，……B n+k N-k battery boxes are selected.
2. The method of claim 1, further comprising the step of, during the performing of the current discharging:
acquiring a fourth set P4{ B 1 ，B 2 ，……B k ，……B n Status information of each battery box in the box and is marked as third information;
judging whether the third information has a fault battery box B e The method comprises the steps of carrying out a first treatment on the surface of the Wherein e=1, 2, … … n;
if the fault battery box exists, the current k redundant battery boxes B are utilized ’ n+1 ，B ’ n+2 ，……B ’ n+k Formed set Pr { B ’ n+1 ，B ’ n+2 ，……B ’ n+k One of the battery boxes B ’ c Performing replacement of the faulty battery box to obtain a fifth set P5{ B } 1 ，B 2 ，……B ’ c ，……B n -a }; where c=n+1, n+2, … … n+k.
3. The method for battery discharge management of a large energy storage power station of claim 2, wherein the battery box B ’ c Screening is carried out by the following steps:
obtaining a fault battery box B e The charge and discharge cycle times of each battery box in the redundant battery box set Pr;
the charge and discharge cycle times and the fault electricity of each battery box in the redundant battery box set Pr are calculatedPool box B e The charge and discharge cycle times are matched to obtain a battery box with the minimum charge and discharge cycle times difference, namely the battery box B ’ c 。
4. The method of battery discharge management for a large energy storage power station of claim 2, further comprising the steps of, prior to replacing a faulty battery box:
acquiring a fourth set P4{ B 1 ，B 2 ，……B k ，……B n The electric quantity and voltage of the battery box without faults in the process;
equalizing battery box B according to electric quantity and voltage of non-fault battery box ’ c Is a function of the power and voltage of the battery.
5. The method for managing battery discharge of a large energy storage power station according to any one of claims 1 to 4, further comprising the steps of, after the current discharge is performed:
acquiring a fourth set P4{ B 1 ，B 2 ，……B k ，……B n Average power of each battery box in the process;
determine the fourth set P4{ B 1 ，B 2 ，……B k ，……B n Whether the average electric quantity of each battery box in the battery box is larger than a second threshold value;
if the average electric quantity is less than or equal to the second threshold value, for the fourth set P4{ B 1 ，B 2 ，……B k ，……B n The fourth set P4 is released after the charge and discharge cycle times of each battery box are added with 1;
and if the average electric quantity is larger than the second threshold value, configuring a serial passage of each battery box in the battery box unit according to the second information and executing the next discharging.
6. A computer readable storage medium, having stored thereon program instructions, which when executed, implement the method of any of claims 1-5.
7. An electronic device, comprising: a processor and a memory for storing one or more programs; the method of any of claims 1-5 is implemented when the one or more programs are executed by the processor.
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| CN107046312A (en) * | 2017-04-06 | 2017-08-15 | 华北电力大学 | A kind of energy-storage battery Optimization Scheduling based on orderly discharge and recharge |
| CN113760074A (en) * | 2021-08-24 | 2021-12-07 | 深圳大普微电子科技有限公司 | Standby power system and solid state disk |
| CN114825510A (en) * | 2022-03-22 | 2022-07-29 | 同济大学 | Redundant energy storage system and dynamic redundancy control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107046312A (en) * | 2017-04-06 | 2017-08-15 | 华北电力大学 | A kind of energy-storage battery Optimization Scheduling based on orderly discharge and recharge |
| CN113760074A (en) * | 2021-08-24 | 2021-12-07 | 深圳大普微电子科技有限公司 | Standby power system and solid state disk |
| CN114825510A (en) * | 2022-03-22 | 2022-07-29 | 同济大学 | Redundant energy storage system and dynamic redundancy control method |
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