CN116865404A - Parallel operation method, device, equipment and medium for battery cluster system - Google Patents

Parallel operation method, device, equipment and medium for battery cluster system Download PDF

Info

Publication number
CN116865404A
CN116865404A CN202310883210.9A CN202310883210A CN116865404A CN 116865404 A CN116865404 A CN 116865404A CN 202310883210 A CN202310883210 A CN 202310883210A CN 116865404 A CN116865404 A CN 116865404A
Authority
CN
China
Prior art keywords
battery
battery cluster
slave
parallel operation
host
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310883210.9A
Other languages
Chinese (zh)
Inventor
熊路兵
袁浩兵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Gefuen New Energy Technology Co ltd
Original Assignee
Shenzhen Gefuen New Energy Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Gefuen New Energy Technology Co ltd filed Critical Shenzhen Gefuen New Energy Technology Co ltd
Priority to CN202310883210.9A priority Critical patent/CN116865404A/en
Publication of CN116865404A publication Critical patent/CN116865404A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
    • 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
    • H02J15/00—Systems for storing electric energy
    • 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
    • H02J7/0013—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
    • 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
    • H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect 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
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
    • H02S10/20—Systems characterised by their energy storage means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/30—Electrical components
    • H02S40/38—Energy storage means, e.g. batteries, structurally associated with PV modules
    • 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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • 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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
    • 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
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • 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

Landscapes

  • 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 application relates to a battery cluster system parallel operation method, a device, equipment and a medium, wherein the method comprises the following steps: performing master-slave competition on the plurality of battery clusters to obtain master-slave competition results, wherein the master-slave competition results comprise a host battery cluster, a slave battery cluster and the actual number of parallel machines, and the rest battery clusters except the host battery cluster in the plurality of battery clusters are set as slave battery clusters; collecting voltage information of a plurality of battery clusters to obtain a voltage information result, wherein the voltage information result comprises the voltage state of each battery cluster; and closing and combining the battery cluster group according to the voltage information result and the master-slave competition result to obtain a battery stack energy storage system. The application takes the host battery cluster, the slave battery cluster and the actual parallel operation number as the basis, acquires the battery stack energy storage system after closing the parallel operation, and the acquisition of the actual parallel operation number in the whole process is derived from master-slave competition, so that the technical problem that an abnormal state is easy to occur in the step of closing the parallel operation is solved in a low-cost mode.

Description

Parallel operation method, device, equipment and medium for battery cluster system
Technical Field
The application relates to the field of photovoltaic energy storage, in particular to a parallel operation method, device, equipment and medium of a battery cluster system.
Background
The development of the photovoltaic industry is thousands of days, a photovoltaic energy storage system is generated, the power consumption requirement of a user is increased along with continuous iterative upgrading of electric equipment, and a parallel operation capacity expansion scheme is commonly adopted in the industry to solve the problems. However, in the existing parallel operation capacity expansion scheme, an abnormal state is likely to occur in the step of implementing the closing parallel operation, and a large amount of labor cost is required to solve the abnormal state. Since the development of the photovoltaic industry is rapid, related technical problems are easily ignored and masked, and thus no reasonable solution has been proposed for the problems.
Disclosure of Invention
The technical problems to be solved by the application are as follows: how to design a battery cluster system parallel operation method, which can solve the problems.
In order to solve the above problems, an embodiment of the present application provides a method, an apparatus, a device, and a medium for parallel operation of a battery cluster system. The inventor finds that the number of parallel operation in an ideal state and the number of parallel operation in an actual state are inconsistent easily, so that the problems are caused; the application takes the host battery cluster, the slave battery cluster and the actual parallel operation number as the basis, acquires the battery stack energy storage system after closing the parallel operation, and the acquisition of the actual parallel operation number in the whole process is derived from master-slave competition, so that the technical problem that an abnormal state is easy to occur in the step of closing the parallel operation is solved in a low-cost mode.
In a first aspect, the present invention provides a method for merging battery clusters, where a battery cluster group includes a plurality of battery clusters, the number of the plurality of battery clusters is at least two, and the plurality of battery clusters are connected to each other, and the method for merging battery clusters includes: and performing master-slave competition on the plurality of battery clusters to obtain master-slave competition results, wherein the master-slave competition results comprise a host battery cluster, a slave battery cluster and the actual number of parallel machines, and the rest battery clusters except the host battery cluster among the plurality of battery clusters are set as slave battery clusters. Acquiring voltage information of a plurality of battery clusters to acquire a voltage information result, wherein the voltage information result comprises a voltage state of each battery cluster; and closing and combining the battery cluster group according to the host battery cluster, the slave battery cluster, the actual number of combined machines and the voltage information result to obtain a battery stack energy storage system.
The further technical scheme is that a BMS system is arranged in each of the plurality of battery clusters; the method comprises the steps of collecting voltage information of a plurality of battery clusters, and obtaining a voltage information result, wherein before the voltage information result comprises the voltage state of each battery cluster, the method further comprises the steps of: and receiving the preset parallel operation number sent by a preset energy storage converter, and storing the preset parallel operation number in a BMS system of the host battery cluster, wherein the preset parallel operation number is equal to the total number of battery clusters contained in the battery cluster group.
The further technical proposal is that the number of the plurality of battery clusters is at least three; performing master-slave competition on the plurality of battery clusters to obtain master-slave competition results, including: screening the battery clusters according to preset screening conditions to obtain a host battery cluster and a slave battery cluster; acquiring the actual number of parallel machines according to the communication results between the BMS system of the host battery cluster and the BMS system of the slave battery cluster; and confirming the host battery cluster, the slave battery cluster and the actual parallel operation number as master-slave competition results.
According to the further technical scheme, according to the communication results between the BMS system of the host battery cluster and the BMS system of the slave battery cluster, the actual parallel operation number is obtained, and the method comprises the following steps: acquiring host identification information of the host battery cluster and a plurality of slave identification information of the slave battery cluster; judging whether the sum of the number of the host identification information and the number of the slave identification information is equal to the preset parallel operation number or not; and if the sum of the number of the host identification information and the number of the slave identification information is equal to the preset parallel operation number, setting the preset parallel operation number as the actual parallel operation number.
The battery cluster system parallel operation method further comprises the following steps: if the sum of the number of the host identification information and the number of the slave identification information is not equal to the preset parallel operation number, calculating the deviation number between the sum of the number of the host identification information and the number of the slave identification information and the preset parallel operation number; and subtracting the deviation number from the preset parallel operation number to obtain the actual parallel operation number.
The battery clusters comprise high-voltage boxes, wherein a BMS system is arranged in each high-voltage box, and an MCU processor is arranged in each BMS system; each battery cluster comprises a plurality of battery PACKs, and the high-voltage box is connected with the plurality of battery PACKs in series; screening the battery clusters according to preset screening conditions to obtain a host battery cluster and a slave battery cluster, wherein the method comprises the following steps: acquiring a interception value corresponding to the preset parallel operation number in a preset conversion table, wherein the conversion table is used for recording the corresponding relation between the preset parallel operation number and the interception value; reading FLASH identification information in each MCU processor to obtain a plurality of ID internal numbers of a plurality of MCU processors; according to the interception value, converting mantissas of a plurality of ID internal numbers of a plurality of MCU processors into a plurality of competing numbers, wherein the number of each competing number is equal to the interception value; performing master-slave competition on the plurality of competition numbers according to preset conditions, and screening the competition numbers meeting the preset conditions as host numbers; and setting the battery cluster corresponding to the host number as a host battery cluster, and setting the rest battery clusters except the host battery cluster in the plurality of battery clusters as slave battery clusters.
According to the further technical scheme, the method comprises the steps of closing and combining the battery cluster group according to the host battery cluster, the slave battery cluster, the actual number of combined machines and the voltage information result to obtain a battery stack energy storage system, and comprises the following steps: acquiring a host battery cluster in a first voltage state according to the host battery cluster and the voltage information result; acquiring a secondary battery cluster in a second voltage state according to the secondary battery cluster, the actual parallel operation number and the voltage information result; balancing voltages of a first voltage value of the host battery cluster in the first voltage state and a plurality of second voltage values of the slave battery clusters in the second voltage state in an active balancing mode to obtain a host battery cluster in a third voltage state and a slave battery cluster in a fourth voltage state; and closing and combining the host battery cluster in the third voltage state and the slave battery cluster in the fourth voltage state to obtain a battery stack energy storage system.
In a second aspect, the invention provides a battery cluster system parallel operation device, which comprises an energy storage converter and a battery cluster group, wherein the energy storage converter is connected with the battery cluster group; the battery cluster group comprises a plurality of battery clusters, the battery clusters are connected with each other, and the energy storage converter and the battery clusters are connected with the bus; the battery clusters comprise high-voltage boxes, a BMS system is arranged in each high-voltage box, and an MCU processor is arranged in each BMS system; each battery cluster comprises a plurality of battery PACKs, and the high-voltage box is connected with the plurality of battery PACKs in series; the energy storage converter is connected with the BMS system, and the BMS system is used for identifying the ID internal number of the MCU processor; the battery cluster system parallel operation device further comprises a unit for executing the method according to the first aspect.
In a third aspect, the present invention proposes a battery cluster system parallel operation device comprising means for performing the method according to the first aspect.
In a fourth aspect, the invention proposes a computer-readable storage medium storing a computer program which, when executed by a processor, implements the method according to the first aspect.
The battery cluster system parallel operation device can execute the following steps: setting the parallel machine number M of the battery modules in the energy storage current transformer, electrifying all battery clusters, performing master-slave competition on all BMSs through the internal IDs of the MCUs, selecting the master machine with the smallest internal ID value, determining the master machine, then distributing addresses to all the slave machines by the master machine, communicating the master machine with the slave machines in a polling mode, wherein the polling can ensure that the MCU load rate is always in a reasonable range, and the energy storage current transformer only communicates with the master machine; after the distribution of the master machine and the slave machines and the number of the parallel machines are M, the master machine collects the voltage information of all the slave machines, and firstly, the battery clusters with total voltage and total voltage are closed and pre-charged with a relay to be balanced until the maximum difference value of the total voltage of all the battery clusters is in an allowable range, wherein the allowable range of the total voltage difference value is determined by a pre-charge resistance value and rated power; at the moment, all the battery clusters can be switched on and operated in parallel. If the number of the parallel operation acquired by the parallel operation host is smaller than M, the parallel operation is not performed and errors are reported. If the slave machine fails, the slave machine main power relay is disconnected, the slave machine reports errors, other battery clusters are not affected, the parallel machine number in the upper computer of the energy storage converter is modified to be M-1, and normal operation can be continued; if the host fails, the host controls other slave host power relays to be disconnected, the host switches to a single-machine mode and alarms, the number of parallel machines in the upper computer of the energy storage converter is modified to be M-1, and all the slaves compete for the host and continue to operate.
The inventor finds that the number of parallel machines in an ideal state and the number of parallel machines in an actual state are easy to be inconsistent, so that the problems are caused, and particularly the number of parallel machines in the actual state is easy to be influenced by various abnormal states, including but not limited to poor contact, battery faults and the like, and the abnormal states are not foreseen and controlled by engineers; the application takes the host battery cluster, the slave battery cluster and the actual parallel operation number as the basis, acquires the battery stack energy storage system after closing the parallel operation, and the acquisition of the actual parallel operation number in the whole process is derived from master-slave competition, so that the technical problem that an abnormal state is easy to occur in the step of closing the parallel operation is solved in a low-cost mode.
The new energy industry develops rapidly in the last two years, the household photovoltaic energy storage system is generated, and along with the continuous updating iteration of household appliances and the continuous increase of the number of household appliances, the electric quantity of a single battery cluster system can not meet the electricity consumption requirement of a user, and the parallel operation capacity expansion scheme can solve the requirement.
1. The solar energy storage device can help customers with demands to expand the battery cluster, so that more energy generated by solar energy generation is stored in the battery, and the energy is utilized to a greater extent.
2. The number of the closing parallel machines is determined by the number of reliable battery clusters, unreliable battery clusters are removed in a low-cost mode, and the whole method and system CAN be completed only by a group of CAN buses.
3. And under the condition that the sum of the number of the host identification information and the number of the slave identification information is not equal to the preset parallel operation number, calculating the deviation number between the sum of the number of the host identification information and the number of the slave identification information and the preset parallel operation number, and if the deviation number is larger than zero, sending an alarm signal.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are used in the description of the embodiments or the prior art will be briefly described, and it is possible for a person skilled in the art to obtain further drawings from these drawings without inventive effort.
Fig. 1 is a schematic flow chart of a parallel operation method of a battery cluster system according to an embodiment of the present invention.
Fig. 2 is another flow chart of a parallel operation method of a battery cluster system according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a parallel operation device of a battery cluster system according to an embodiment of the present invention.
Fig. 4 is a block diagram of a parallel operation device of a battery cluster system according to an embodiment of the present invention.
Fig. 5 is a block diagram of an electronic 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 fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. 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.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to one or any and all possible combinations of the associated listed items, and includes such combinations.
As used in this specification and the appended claims, the term "if" may be interpreted as "when..once" or "in response to a determination" or "in response to detection" depending on the context. Similarly, the phrase "if a determination" or "if a [ described condition or event ] is detected" may be interpreted in the context of meaning "upon determination" or "in response to determination" or "upon detection of a [ described condition or event ]" or "in response to detection of a [ described condition or event ]".
Example 1
Referring to fig. 1, fig. 1 is a schematic flow chart of a parallel operation method of a battery cluster system according to an embodiment of the invention. The embodiment of the invention provides a battery cluster system parallel operation method, which is applied to a BMS system, and can obtain a battery stack energy storage system after a plurality of battery clusters are parallel operation; the battery cluster system parallel operation method comprises the following steps:
s101, performing master-slave competition on a plurality of battery clusters to obtain master-slave competition results, wherein the master-slave competition results comprise a host battery cluster, a slave battery cluster and the actual number of parallel machines.
In the above-described scheme, the remaining battery clusters other than the master battery cluster among the plurality of battery clusters are set as slave battery clusters. The actual parallel operation number is the number of battery clusters which can actually participate in the parallel operation when the parallel operation is actually performed, and the technical obstacle caused by the uncertainty of the actual parallel operation number belongs to the technical problem to be solved in the industry.
In an embodiment, master-slave competition is performed among a plurality of battery clusters, and a respective BMS system of each battery cluster obtains a result of master-slave competition among the plurality of battery clusters, where the master-slave competition result includes a master battery cluster, a slave battery cluster, and an actual number of parallel machines.
In one embodiment, the step S101 includes: screening the battery clusters according to preset screening conditions to obtain a host battery cluster and a slave battery cluster; acquiring the actual number of parallel machines according to the communication results between the BMS system of the host battery cluster and the BMS system of the slave battery cluster; and confirming the host battery cluster, the slave battery cluster and the actual parallel operation number as master-slave competition results.
S102, collecting voltage information of a plurality of battery clusters, and obtaining a voltage information result, wherein the voltage information result comprises a voltage state of each battery cluster.
The specific technical means for acquiring the voltage information of the plurality of battery clusters and acquiring the voltage information result are known by those skilled in the art. The voltage information result comprises a plurality of voltage states, i.e. a plurality of values. The method has the technical effect of preparing for the consistency of voltage in the subsequent closing parallel operation process.
And S103, closing and combining the battery cluster group according to the host battery cluster, the slave battery cluster, the actual number of combined machines and the voltage information result to obtain a battery stack energy storage system.
The battery cluster group is switched on and combined, the first is voltage consistency, the second is master-slave competition result definition, and after the two elements are confirmed, the obtained battery stack energy storage system can be put into practical engineering use. In the above scheme, the battery cluster group is closed and combined to obtain the battery stack energy storage system, namely, a first state of the battery cluster in the battery cluster group is adjusted to a second state of the battery cluster in the battery stack energy storage system; those skilled in the art will appreciate that the voltages of the individual clusters within the stack are not uniformly distributed in value and that the voltages of the individual clusters within the stack energy storage system are closely related in value.
The inventor finds that the number of parallel machines in an ideal state and the number of parallel machines in an actual state are easy to be inconsistent, so that the problems are caused, and particularly the number of parallel machines in the actual state is easy to be influenced by various abnormal states, including but not limited to poor contact, battery faults and the like, and the abnormal states are not foreseen and controlled by engineers; the application takes the host battery cluster, the slave battery cluster and the actual parallel operation number as the basis, acquires the battery stack energy storage system after closing the parallel operation, and the acquisition of the actual parallel operation number in the whole process is derived from master-slave competition, so that the technical problem that an abnormal state is easy to occur in the step of closing the parallel operation is solved in a low-cost mode.
In one embodiment, the step S103 includes the following steps:
s501, obtaining the host battery cluster in the first voltage state according to the host battery cluster and the voltage information result.
In the above scheme, the first voltage state is a specific value, the voltage state of the host battery cluster in the first voltage state is obtained according to the voltage information result, and the battery cluster corresponding to the host battery cluster in the first voltage state is obtained according to the master-slave competition result.
S502, obtaining the secondary battery cluster in the second voltage state according to the secondary battery cluster, the actual parallel operation number and the voltage information result.
In the above scheme, the second voltage state is a plurality of specific values, the voltage state of the secondary battery cluster in the second voltage state is obtained according to the voltage information result, and the battery cluster corresponding to the secondary battery cluster in the second voltage state is obtained according to the master-slave competition result.
And S503, balancing voltages of the first voltage value of the host battery cluster in the first voltage state and the second voltage values of the slave battery clusters in the second voltage state in an active balancing mode to obtain the host battery cluster in the third voltage state and the slave battery clusters in the fourth voltage state.
And the maximum deviation value among the deviation values between the host battery cluster in the third voltage state and the slave battery clusters in the fourth voltage state is smaller than a preset deviation threshold value. The first voltage value of the host battery cluster in the first voltage state is a numerical value, and the second voltage values of the slave battery cluster in the second voltage state are a plurality of numerical values; and balancing the first voltage value of the host battery cluster in the first voltage state and a plurality of second voltage values of the slave battery clusters in the second voltage state in an active balancing mode, namely firstly determining a boundary between high voltage and low voltage, then judging whether one value is higher than the boundary, judging whether the plurality of values are higher than the boundary, judging the battery cluster higher than the boundary as high voltage, and judging the battery cluster lower than the boundary as low voltage. The specific way of balancing the voltages by means of active balancing is known to the person skilled in the art.
And S504, closing and combining the host battery cluster in the third voltage state and the slave battery cluster in the fourth voltage state to obtain a battery stack energy storage system.
And the maximum deviation value among the deviation values between the host battery cluster in the third voltage state and the slave battery clusters in the fourth voltage state is smaller than a preset deviation threshold value.
In the above-mentioned S501-S504 scheme, if the first voltage value of the host battery cluster in the first voltage state belongs to a high voltage, the first voltage of the host battery cluster in the first voltage state is reduced to obtain a host battery cluster in a third voltage state; if the first voltage value of the host battery cluster in the first voltage state belongs to low voltage, the first voltage of the host battery cluster in the first voltage state is raised to obtain a host battery cluster in a third voltage state; and if the plurality of second voltage values of the secondary battery cell cluster in the second voltage state belong to high voltage/low voltage, reducing/increasing the plurality of second voltage values of the secondary battery cell cluster in the second voltage state to obtain a secondary battery cell cluster in a fourth voltage state. The specific manner of adjustment described above is known to those skilled in the art.
The beneficial effects of the above S501-S504 are that the stability of the whole closing parallel operation scheme is improved by limiting the relation between the adjusted third voltage state and the adjusted fourth voltage state.
Example 2
Referring to fig. 2-3, fig. 2 is a schematic flow chart of another parallel operation method of a battery cluster system according to an embodiment of the present invention. Fig. 3 is a schematic diagram of a parallel operation device of a battery cluster system, provided by the embodiment of the invention, where the parallel operation device of the battery cluster system includes an energy storage converter 1 and a battery cluster group 10, and the energy storage converter 1 is connected with the battery cluster group 10; the battery cluster group 10 comprises a plurality of battery clusters 20, the battery clusters 20 are connected with each other, and the energy storage converter 1 and the battery clusters 20 are connected with the bus 2; the battery clusters 20 comprise a high-voltage box 30, a BMS system 20a is arranged in the high-voltage box 30, and an MCU processor is arranged in the BMS system 20 a; the battery clusters 20 each include a plurality of battery PACKs, and the high-voltage tank 30 is connected in series with the plurality of battery PACKs; the energy storage converter 1 is connected with the BMS system 20a, the BMS system 20a is used for identifying the ID internal number of the MCU processor, and fig. 3 shows the structure of the parallel operation device of the battery cluster system.
The battery cluster system parallel operation method specifically comprises the following steps:
s201, screening the battery clusters according to preset screening conditions to obtain a host battery cluster and a slave battery cluster.
In the above scheme, the preset screening condition may be set by an engineer; screening the battery clusters according to preset screening conditions to obtain a host battery cluster and a slave battery cluster, namely, grouping and defining the battery clusters according to requirements to define the host battery cluster and the slave battery cluster.
In one embodiment, the step S201 includes the steps of: acquiring a corresponding interception value of the preset parallel operation number in a preset conversion table; reading FLASH identification information in each MCU processor to obtain a plurality of ID internal numbers of a plurality of MCU processors; according to the interception value, converting mantissas of a plurality of ID internal numbers of a plurality of MCU processors into a plurality of competing numbers, wherein the number of each competing number is equal to the interception value; performing master-slave competition on the plurality of competition numbers according to preset conditions, and screening the competition numbers meeting the preset conditions as host numbers; and setting the battery cluster corresponding to the host number as a host battery cluster, and setting the rest battery clusters except the host battery cluster in the plurality of battery clusters as slave battery clusters.
S202, acquiring the actual parallel operation number according to the communication results between the BMS system of the host battery cluster and the BMS system of the slave battery cluster.
The battery cluster system merging method can be used for a BMS system of the host battery cluster after the host battery cluster and the slave battery cluster are determined. Referring specifically to fig. 3, the BMS systems of the master battery cluster and the BMS systems of the slave battery clusters are connected with each other and can communicate with each other, and thus mutual authentication can be achieved between the two.
In an embodiment, the BMS system of the master battery cluster and the BMS system of the slave battery cluster are connected with each other in a CAN bus manner; in another embodiment, the BMS systems of the master battery cluster and the BMS systems of the slave battery cluster are connected with each other in such a way that connection is realized through a CAN bus and a power line; CAN represents the CAN bus in fig. 3, PW represents the power line.
In one embodiment, the step S202 includes the following steps: acquiring host identification information of the host battery cluster and a plurality of slave identification information of the slave battery cluster; judging whether the sum of the number of the host identification information and the number of the slave identification information is equal to the preset parallel operation number or not; and if the sum of the number of the host identification information and the number of the slave identification information is equal to the preset parallel operation number, setting the preset parallel operation number as the actual parallel operation number.
And S203, confirming the host battery cluster, the slave battery cluster and the actual parallel operation number as master-slave competition results.
The master-slave competition result is used for supporting the closing parallel operation of the whole system in the next step, and comprises a host battery cluster, a slave battery cluster and the actual parallel operation number, wherein the numerical value of the actual parallel operation number is a reliable numerical value, and the total number of the reliable battery clusters can be truly reflected.
S204, receiving the preset parallel operation number sent by the preset energy storage converter, and storing the preset parallel operation number in the BMS system of the host battery cluster.
The preset energy storage converter can be used for realizing alternating current-direct current exchange. The preset parallel operation number is equal to the total number of the battery clusters contained in the battery cluster group, and is specifically set by an engineer, namely the engineer can count the number of all the battery clusters and input the number into the energy storage converter, so that the preset energy storage converter can send the preset parallel operation number to the BMS system of the host battery cluster.
In the above scheme, the preset energy storage current transformer is connected with the BMS system of the host battery cluster through a bus, and the BMS system of the host battery cluster receives the preset parallel operation number sent by the preset energy storage current transformer and stores the preset parallel operation number in the BMS system of the host battery cluster.
In an embodiment, the energy storage converter functions as a BMS system: on one hand, a 120 ohm terminal resistor is provided for the CAN bus during master-slave competition, so that the anti-interference capability of the CAN bus is improved, and the feasibility and accuracy of master-slave competition are ensured; and the other side is used for sending the parallel operation quantity to the BMS system of the host battery cluster, and the BMS system of the host battery cluster is used for collecting the slave operation quantity and comparing the slave operation quantity with the parallel operation quantity sent by the energy storage converter.
S205, collecting voltage information of the plurality of battery clusters, and obtaining a voltage information result, wherein the voltage information result comprises the voltage state of each battery cluster.
The specific technical means for acquiring the voltage information of the plurality of battery clusters and acquiring the voltage information result are known by those skilled in the art. The voltage information result comprises a plurality of voltage states, i.e. a plurality of values. The method has the technical effect of preparing for the consistency of voltage in the subsequent closing parallel operation process.
S206, closing and combining the battery cluster group according to the host battery cluster, the slave battery cluster, the actual number of combined machines and the voltage information result to obtain a battery stack energy storage system.
The battery cluster group is switched on and combined, the first is voltage consistency, the second is master-slave competition result definition, and after the two elements are confirmed, the obtained battery stack energy storage system can be put into practical engineering use.
The technical problem that abnormal states easily occur in the step of closing the parallel operation is solved in a low-cost mode, and the closing parallel operation reliability after the quantity verification is higher.
In one embodiment, the step S202 includes the following steps:
s301, acquiring host identification information of the host battery cluster and a plurality of slave identification information of the slave battery cluster.
In the above scheme, the master identification information of the master battery cluster and the plurality of slaves identification information of the slave battery cluster are acquired, and the BMS system of the master battery cluster acquires the master identification information of the master battery cluster, and the BMS system of the master battery cluster distributes a plurality of slaves identification information to the BMS system of the plurality of slaves battery clusters, wherein the BMS system of each slave battery cluster distributes one slave identification information. The battery pack comprises a battery pack, a slave battery pack, an energy storage converter and a battery pack, wherein the battery pack comprises a battery pack of a host battery, the battery pack of the slave battery pack is connected with the battery pack of the slave battery pack, the battery pack of the slave battery pack is connected with the battery pack of the host battery pack, and the battery pack of the slave battery pack is connected with the battery pack of the slave battery pack. Wherein the polling means are known to the skilled person, and the above steps can be implemented by engineers in the art according to the content of the specification.
In an embodiment, the identification information, i.e. the address, is obtained from the master address of the master battery cluster and from the plurality of slaves of the slave battery cluster, and the BMS system specifically comprising the master battery cluster obtains the master address of the master battery cluster, and the BMS system of the master battery cluster allocates a plurality of slaves addresses to the BMS system of the plurality of slaves battery clusters, wherein the BMS system of each slave battery cluster allocates one slave address.
In an embodiment, if the host identification information of the host battery cluster is invalid identification information, an alarm signal is sent out, and steps as shown in steps S101-S103 are performed on the plurality of slave battery clusters, including performing master-slave competition on the plurality of slave battery clusters to obtain a new master-slave competition result, where the new master-slave competition result includes a new host battery cluster, a new slave battery cluster, and a new actual number of parallel machines, until a new battery stack energy storage system is obtained.
S302, judging whether the sum of the number of the host identification information and the number of the slave identification information is equal to the preset parallel operation number.
And judging whether the sum of the number of the host identification information and the number of the slave identification information is equal to a main body of a preset parallel operation number, and judging the BMS system of the host battery cluster.
S303, if the sum of the number of the host machine identification information and the number of the slave machine identification information is equal to a preset parallel machine number, setting the preset parallel machine number as an actual parallel machine number.
If the sum of the number of the host identification information and the number of the slave identification information is equal to the preset parallel operation number, the number of the host identification information and the number of the slave identification information represent that no abnormal states such as poor contact, battery faults and the like occur, and at the moment, the preset parallel operation number and the actual parallel operation number can be used in the subsequent closing parallel operation process.
In an embodiment, if the sum of the number of the host identification information and the number of the slave identification information is not equal to the preset parallel operation number, calculating the deviation amount between the sum of the number of the host identification information and the number of the slave identification information and the preset parallel operation number; and subtracting the deviation number from the preset parallel operation number to obtain the actual parallel operation number.
If the sum of the number of the host identification information and the number of the slave identification information is equal to the preset parallel operation number, the number of the host identification information and the number of the slave identification information represent that no abnormal states such as poor contact, battery faults and the like occur, and at the moment, the preset parallel operation number and the actual parallel operation number can be used in the subsequent closing parallel operation process.
The beneficial effect of above-mentioned scheme is, whether confirm through judging whether the mode that the deviation quantity exists whether appear contacting failure, battery fault etc. abnormal state, the whole in-process need not the engineer participate in, only need use the BMS system of host computer battery cluster as leading can accomplish the confirmation of actual parallel operation number, has shown to have promoted the efficiency and the convenience of obtaining actual parallel operation number.
In one embodiment, the step S201 includes the steps of:
s401, obtaining the interception value corresponding to the preset parallel operation number in a preset conversion table.
In the above scheme, the conversion table is used for recording the corresponding relation between the preset parallel operation number and the interception value. The preset conversion table is set according to the condition that the length of the ID internal number of the MCU processor in the prior art is not exceeded, and the preset parallel operation number and the interception number in the conversion table are positively correlated, namely, the interception number is determined by the preset parallel operation number, and under the condition that the preset parallel operation number checked by an engineer is large enough, the interception number can be an integer with a larger value, so that the waste of operation resources is avoided.
For example, if the preset parallel operation number is 10, the corresponding cut-out value in the preset conversion table is 2, so that the competition numbers obtained subsequently cannot be repeated, and even if the person skilled in the art can repeat the competition numbers. If the preset parallel operation number is 30, the corresponding interception value in the preset conversion table is 3, and the preset parallel operation number is changed from 10 to 30, so that the corresponding interception value is changed from 2 to 3, thus the competition numbers obtained subsequently cannot be repeated, and even if the competition numbers are repeated, the problem can be solved by a person skilled in the art. If the preset parallel operation number is 100, the corresponding interception value in the preset conversion table is 5, and under the condition that the preset parallel operation number is 100, a large amount of resources are consumed for solving the problem in the prior art, and the interception value of the scheme can be flexibly changed according to actual conditions, so that the waste of operation resources can be effectively avoided. Preferably, the cut-out value obtained according to the preset conversion table does not exceed the value 10; further, the truncated value obtained according to the preset conversion table does not exceed the value 5.
S402, reading FLASH identification information in each MCU processor to obtain a plurality of ID internal numbers of a plurality of MCU processors.
The main body of the FLASH identification information in each MCU processor is the BMS system of each battery cluster, namely the BMS system of each battery cluster respectively reads the MCU processor corresponding to the BMS system; specific implementation means for reading the FLASH identification information inside each MCU processor are known to those skilled in the art.
S403, converting mantissas of a plurality of ID internal numbers of a plurality of MCU processors into a plurality of competing numbers according to the intercepting numerical value, wherein the number of each competing number is equal to the intercepting numerical value.
The size relationship between the truncated value and the number of digits of the ID internal number is known to those skilled in the art, that is, those skilled in the art will not exceed the number of digits of the ID internal number when setting the translation table. In an embodiment, the bit length of the ID internal number is 10, the preset parallel number is 30, the truncated value is 3, and at this time, according to the truncated value 3, the last 3 mantissas of the plurality of 10-bit ID internal numbers of the plurality of MCU processors are converted into a plurality of 3-bit competition numbers, that is, the number of each competition number is equal to the truncated value. Therefore, the length of the competition number generated in the steps is obviously reduced compared with the ID internal number of the MCU processor, which is more beneficial to saving operation resources in active competition.
In an embodiment, a plurality of ID internal numbers of a plurality of MCU processors are obtained, specifically, ID internal numbers of a battery cluster a, a battery cluster B, and a battery cluster C are respectively obtained, the battery cluster a corresponds to 0X1FF56789, the battery cluster B corresponds to 0X7E845678, and the battery cluster C corresponds to 0XF8F34567; the actual length of the ID internal number, which the engineer in the field knows, will be larger than the ID internal number length in the embodiments described above, which the engineer in the field can realize from the description.
S404, performing master-slave competition on the plurality of competition numbers according to the preset conditions, and screening the competition numbers meeting the preset conditions as host numbers.
And the screening principle is that the competitive number with the smallest value of the competitive number is used as the host number, namely the preset condition is that the number with the smallest value is selected. In one embodiment, the plurality of competing numbers are ranked according to a predetermined condition, and the competing number with the smallest value is selected as the host number.
S405, setting the battery cluster corresponding to the host number as a host battery cluster, and setting the rest battery clusters except the host battery cluster in a plurality of battery clusters as slave battery clusters.
In the steps S404-S405, the definition of master-slave competition is known to those skilled in the art, specifically, the mantissa of the ID internal number of the battery cluster a is converted into the competition number 56789, which corresponds to "0101 01100111 1000 1001"; the mantissa conversion of the ID internal number of battery cluster B to the competing number 45678 corresponds to "0100 0101 01100111 1000", the mantissa conversion of the ID internal number of battery cluster C to the competing number 34567 corresponds to "0011 0100 0101 0110 0111", and the competing process is described in the case of these three samples: after master-slave competition starts, all machine battery clusters A, B and C are represented by ABC, namely machine A, machine B and machine C, three parties send first binary numbers to a CAN bus together, A, B, C are all 0, the machine A, B, C receives returned 0 signals after line and operation, then sends second binary numbers to the CAN bus together, A, B is 1, C is 0, only 0 signals are on the bus after line and operation, so that the return value received by A, B is 0 and inconsistent with the sent 1 signals, the signal transmission is stopped, the 0 signals received by C are consistent with the transmission, and the rest signals are continuously transmitted until all signals are received, and only the machine C completely receives signals transmitted by itself, so that the machine C is the host battery cluster.
The master-slave competition can finally select the battery cluster with the minimum competition number as the host battery cluster, and the process can be realized by engineers in the field according to the content of the specification. In the prior art, to achieve the similar technical effects, addresses of all battery clusters need to be randomly generated, and then active competition is carried out according to all the addresses.
The beneficial effects of the S401-S405 are that by obtaining the intercepting numerical value corresponding to the preset parallel operation number in the preset conversion table and adding the technical means of converting the mantissas of the ID internal numbers of the MCU processors into the competing numbers according to the intercepting numerical value, the quantity of each competing number is limited to be equal to the intercepting numerical value, the burden in the master-slave competition process is obviously reduced, the operation resource is effectively solved, and the waste of the operation resource can be effectively avoided.
Example 3
Referring to fig. 4, fig. 4 is a block diagram of a parallel operation device of a battery cluster system according to another embodiment of the present application. Corresponding to the above battery cluster system parallel operation method, the application also provides a battery cluster system parallel operation device 70. The battery cluster system parallel operation device 70 includes a unit for executing the battery cluster system parallel operation method, and the device may be configured in a terminal such as a desktop computer, a tablet computer, a portable computer, and the like, and specifically includes:
And a master-slave competition unit 71, configured to perform master-slave competition on the plurality of battery clusters, and obtain a master-slave competition result, where the master-slave competition result includes a master battery cluster, a slave battery cluster, and an actual number of parallel machines, and the remaining battery clusters other than the master battery cluster among the plurality of battery clusters are set as slave battery clusters.
The information collection unit 72 is configured to collect voltage information about the plurality of battery clusters, and obtain a voltage information result, where the voltage information result includes a voltage state of each battery cluster.
And the closing parallel operation unit 73 performs closing parallel operation on the battery cluster group according to the host battery cluster, the slave battery cluster, the actual parallel operation number and the voltage information result to obtain a battery stack energy storage system.
Further, the performing master-slave competition on the plurality of battery clusters to obtain a master-slave competition result includes: screening the battery clusters according to preset screening conditions to obtain a host battery cluster and a slave battery cluster; acquiring the actual number of parallel machines according to the communication results between the BMS system of the host battery cluster and the BMS system of the slave battery cluster; and confirming the host battery cluster, the slave battery cluster and the actual parallel operation number as master-slave competition results.
The battery cluster system parallel operation device has the beneficial effects that the battery cluster system parallel operation device can obtain the battery stack energy storage system after closing and parallel operation based on the host battery cluster, the slave battery cluster and the actual parallel operation number, and the acquisition of the actual parallel operation number in the whole process is derived from master-slave competition, so that the technical problem that abnormal states easily occur in the step of closing and parallel operation is solved in a low-cost mode.
Example 4
Referring to fig. 5, fig. 5 is a block diagram of an electronic device according to the present invention. The electronic device may be a terminal or a server, where the terminal may be an electronic device having a communication function, such as a smart phone, a tablet computer, a notebook computer, a desktop computer, a personal digital assistant, and a wearable device. The servers may be independent servers or may be server clusters formed by servers.
The system comprises a processor 111, a communication interface 112, a memory 113 and a communication bus 114, wherein the processor 111, the communication interface 112 and the memory 113 are communicated with each other through the communication bus 114.
A memory 113 for storing a computer program.
In one embodiment of the present invention, the processor 111 is configured to implement the method provided in any of the foregoing method embodiments when executing the program stored on the memory 113.
It should be appreciated that in an embodiment of the application, the processor 111 may be a central processing unit (Central Processing Unit, CPU), and the processor 502 may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSPs), application specific integrated circuits (Application Specific Integrated Circuit, ASICs), off-the-shelf programmable gate arrays (Field-Programmable Gate Array, FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. Wherein the general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
Those skilled in the art will appreciate that all or part of the flow in a method embodying the above described embodiments may be accomplished by computer programs instructing the relevant hardware. The computer program may be stored in a storage medium that is a computer readable storage medium. The computer program is executed by at least one processor in the computer system to implement the flow steps of the embodiments of the method described above.
Accordingly, an embodiment of the present application also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method provided by any of the method embodiments described above.
The storage medium is a physical, non-transitory storage medium, and may be, for example, a U-disk, a removable hard disk, a Read-Only Memory (ROM), a magnetic disk, or an optical disk. The computer readable storage medium may be nonvolatile or may be volatile.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps described in connection with the embodiments disclosed herein may be embodied in electronic hardware, in computer software, or in a combination of the two, and that the elements and steps of the examples have been generally described in terms of function in the foregoing description to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of each unit is only one logic function division, and there may be another division manner in actual implementation. For example, a unit or component may be combined or may be integrated into another system, or some features may be omitted, or not performed.
The steps in the method of the embodiment of the invention can be sequentially adjusted, combined and deleted according to actual needs. The units in the device of the embodiment of the invention can be combined, divided and deleted according to actual needs. In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The integrated unit may be stored in a storage medium if implemented in the form of a software functional unit and sold or used as a stand-alone product. Based on such understanding, the technical solution of the present invention is essentially or a part contributing to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a terminal, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention.
In the foregoing embodiments, the descriptions of the embodiments are focused on, and for those portions of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims (10)

1. A method for merging battery clusters, wherein a battery cluster group comprises a plurality of battery clusters, the number of the plurality of battery clusters is at least two, the plurality of battery clusters are connected with each other, and the method for merging battery clusters comprises the following steps:
performing master-slave competition on the plurality of battery clusters to obtain master-slave competition results, wherein the master-slave competition results comprise a host battery cluster, a slave battery cluster and the actual number of parallel machines, and the rest battery clusters except the host battery cluster among the plurality of battery clusters are set as slave battery clusters;
Acquiring voltage information of a plurality of battery clusters to acquire a voltage information result, wherein the voltage information result comprises a voltage state of each battery cluster;
and closing and combining the battery cluster group according to the host battery cluster, the slave battery cluster, the actual number of combined machines and the voltage information result to obtain a battery stack energy storage system.
2. The battery cluster system parallel operation method according to claim 1, wherein a BMS system is arranged in each of the plurality of battery clusters; the method comprises the steps of collecting voltage information of a plurality of battery clusters, and obtaining a voltage information result, wherein before the voltage information result comprises the voltage state of each battery cluster, the method further comprises the steps of:
and receiving the preset parallel operation number sent by a preset energy storage converter, and storing the preset parallel operation number in a BMS system of the host battery cluster, wherein the preset parallel operation number is equal to the total number of battery clusters contained in the battery cluster group.
3. The battery cluster system parallel operation method according to claim 1 or 2, wherein the number of the plurality of battery clusters is at least three; performing master-slave competition on the plurality of battery clusters to obtain master-slave competition results, including:
screening the battery clusters according to preset screening conditions to obtain a host battery cluster and a slave battery cluster;
Acquiring the actual number of parallel machines according to the communication results between the BMS system of the host battery cluster and the BMS system of the slave battery cluster;
and confirming the host battery cluster, the slave battery cluster and the actual parallel operation number as master-slave competition results.
4. The battery cluster system parallel operation method according to claim 3, wherein obtaining the actual number of parallel operations according to the communication result between the BMS system of the master battery cluster and the BMS system of the slave battery cluster comprises:
acquiring host identification information of the host battery cluster and a plurality of slave identification information of the slave battery cluster;
judging whether the sum of the number of the host identification information and the number of the slave identification information is equal to the preset parallel operation number or not;
and if the sum of the number of the host identification information and the number of the slave identification information is equal to the preset parallel operation number, setting the preset parallel operation number as the actual parallel operation number.
5. The battery cluster system parallel operation method according to claim 4, wherein the battery cluster system parallel operation method further comprises:
if the sum of the number of the host identification information and the number of the slave identification information is not equal to the preset parallel operation number, calculating the deviation number between the sum of the number of the host identification information and the number of the slave identification information and the preset parallel operation number;
And subtracting the deviation number from the preset parallel operation number to obtain the actual parallel operation number.
6. The battery cluster system parallel operation method according to claim 5, wherein each battery cluster comprises a high-voltage box, wherein a BMS system is arranged in the high-voltage box, and an MCU processor is arranged in the BMS system; each battery cluster comprises a plurality of battery PACKs, and the high-voltage box is connected with the plurality of battery PACKs in series; screening the battery clusters according to preset screening conditions to obtain a host battery cluster and a slave battery cluster, wherein the method comprises the following steps:
acquiring a interception value corresponding to the preset parallel operation number in a preset conversion table, wherein the conversion table is used for recording the corresponding relation between the preset parallel operation number and the interception value;
reading FLASH identification information in each MCU processor to obtain a plurality of ID internal numbers of a plurality of MCU processors;
according to the interception value, converting mantissas of a plurality of ID internal numbers of a plurality of MCU processors into a plurality of competing numbers, wherein the number of each competing number is equal to the interception value;
performing master-slave competition on the plurality of competition numbers according to preset conditions, and screening the competition numbers meeting the preset conditions as host numbers;
And setting the battery cluster corresponding to the host number as a host battery cluster, and setting the rest battery clusters except the host battery cluster in the plurality of battery clusters as slave battery clusters.
7. The method for combining the battery cluster system according to claim 1, wherein the closing and combining are performed on the battery cluster group according to the result of the master battery cluster, the slave battery cluster, the actual number of combined machines and the voltage information, so as to obtain a battery stack energy storage system, and the method comprises the following steps:
acquiring a host battery cluster in a first voltage state according to the host battery cluster and the voltage information result;
acquiring a secondary battery cluster in a second voltage state according to the secondary battery cluster, the actual parallel operation number and the voltage information result;
balancing voltages of a first voltage value of the host battery cluster in the first voltage state and a plurality of second voltage values of the slave battery clusters in the second voltage state in an active balancing mode to obtain a host battery cluster in a third voltage state and a slave battery cluster in a fourth voltage state;
and closing and combining the host battery cluster in the third voltage state and the slave battery cluster in the fourth voltage state to obtain a battery stack energy storage system.
8. A battery cluster system parallel operation device, which is characterized in that: the battery cluster system parallel operation equipment comprises an energy storage converter and a battery cluster group, wherein the energy storage converter is connected with the battery cluster group;
the battery cluster group comprises a plurality of battery clusters, the battery clusters are connected with each other, and the energy storage converter and the battery clusters are connected with the bus; the battery clusters comprise high-voltage boxes, a BMS system is arranged in each high-voltage box, and an MCU processor is arranged in each BMS system; each battery cluster comprises a plurality of battery PACKs, and the high-voltage box is connected with the plurality of battery PACKs in series;
the energy storage converter is connected with the BMS system, and the BMS system is used for identifying the ID internal number of the MCU processor; the battery cluster system parallel operation device further comprises means for performing the method of any of claims 1-7.
9. A battery cluster system parallel operation device, characterized in that the battery cluster system parallel operation device comprises means for performing the method according to any one of claims 1-7.
10. A computer-readable storage medium, characterized by:
the storage medium stores a computer program which, when executed by a processor, implements the method of any of claims 1-7.
CN202310883210.9A 2023-07-18 2023-07-18 Parallel operation method, device, equipment and medium for battery cluster system Pending CN116865404A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310883210.9A CN116865404A (en) 2023-07-18 2023-07-18 Parallel operation method, device, equipment and medium for battery cluster system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310883210.9A CN116865404A (en) 2023-07-18 2023-07-18 Parallel operation method, device, equipment and medium for battery cluster system

Publications (1)

Publication Number Publication Date
CN116865404A true CN116865404A (en) 2023-10-10

Family

ID=88230250

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310883210.9A Pending CN116865404A (en) 2023-07-18 2023-07-18 Parallel operation method, device, equipment and medium for battery cluster system

Country Status (1)

Country Link
CN (1) CN116865404A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117375190A (en) * 2023-12-06 2024-01-09 深圳力高新能技术有限公司 Parallel operation method and system of two-cluster battery system
CN117375190B (en) * 2023-12-06 2024-05-03 深圳力高新能技术有限公司 Parallel operation method and system of two-cluster battery system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117375190A (en) * 2023-12-06 2024-01-09 深圳力高新能技术有限公司 Parallel operation method and system of two-cluster battery system
CN117375190B (en) * 2023-12-06 2024-05-03 深圳力高新能技术有限公司 Parallel operation method and system of two-cluster battery system

Similar Documents

Publication Publication Date Title
EP2629391B1 (en) Method and system for setting up sequential ids for multiple slaves of a battery pack
US20150115711A1 (en) Multi-level data center consolidated power control
CN110492572A (en) A kind of the fast charge method and fast charge control system of lithium battery
CN111178423B (en) Fault early warning method and device
CN115842342B (en) Topology identification method and device for distributed power distribution network
CN103166301A (en) Uninterruptible power system, method of controlling power supply, and recording medium having power supply control program stored therein
US20200133757A1 (en) Apparatus and Method for Diagnosing Communication Fault
CN109521292A (en) A kind of the capacitor group lifetime estimation method and device of modularization multi-level converter
CN112698989B (en) Dual-computer mutual backup method and system of data acquisition system
WO2024083027A1 (en) Energy block parallel communication method and apparatus
CN116865404A (en) Parallel operation method, device, equipment and medium for battery cluster system
CN116783758A (en) Energy storage system, battery monitoring method and energy storage device
CN114977340A (en) Battery charging method, device, equipment and storage medium of charging cabinet
CN116404683A (en) Energy regulation and control method, device, terminal and medium of flexible-direct interconnection system
CN111564857B (en) Parallel battery pack control system, method and device
CN116488149A (en) Method and device for determining micro-grid power generation strategy and micro-grid
CN111373624B (en) Micro-grid control system and method thereof
CN113381434B (en) Method and device for optimizing operation mode of flexible direct-current power grid
CN111131473B (en) Network parameter transmission method and device
CN114138490A (en) Cloud edge management method and system based on distributed cloud platform
CN109638845B (en) Method and device for establishing switching combination scheme of power transmission line
CN218526112U (en) Energy storage battery management system
CN111983490B (en) Nuclear capacity testing system, method and device
JP2020198755A (en) DC power supply system
CN113507154B (en) Charging method and device, charger and electronic equipment

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination