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CN118826200B - Energy storage battery management system based on AUTBUS - Google Patents

Energy storage battery management system based on AUTBUS Download PDF

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Publication number
CN118826200B
CN118826200B CN202410442353.0A CN202410442353A CN118826200B CN 118826200 B CN118826200 B CN 118826200B CN 202410442353 A CN202410442353 A CN 202410442353A CN 118826200 B CN118826200 B CN 118826200B
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power supply
energy storage
supply unit
storage battery
power
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CN118826200A (en
Inventor
施敏捷
王中照
宋久福
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Suzhou Jingkong Energy Technology Co ltd
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Suzhou Jingkong Energy Technology Co ltd
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    • H02J7/52—
    • 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
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • H02J7/84—
    • H02J7/94—
    • H02J7/96—
    • H02J7/977—
    • 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
    • H02J2103/35—

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention discloses an energy storage battery management system based on AUTBUS, which relates to the technical field of energy storage management, and utilizes a AUTBUS network to collect working parameters of an energy storage battery pack and power supply units, wherein a plurality of power supply units are sequentially connected in series, a circuit switching unit is connected to the outside of each power supply unit, and when the power supply unit fails or is maintained, the corresponding circuit switching unit is triggered to connect a front power supply unit and a rear power supply unit of the power supply unit in series and then access to a standby power supply unit. According to the energy storage battery management system based on AUTBUS, the AUTBUS network is used as a communication medium for data transmission, the working parameters of the energy storage unit are comprehensively analyzed to obtain the energy storage health predicted value capable of judging the health condition of the power supply unit, and then the working state of the circuit switching unit is controlled according to the obtained energy storage health predicted value, so that the fault energy storage unit is responded rapidly and accurately, and meanwhile, the influence range of maintenance and the difficulty of maintenance are reduced by utilizing the switching effect of the circuit switching unit.

Description

AUTBUS-based energy storage battery management system
Technical Field
The invention relates to the technical field of energy storage management, in particular to an energy storage battery management system based on AUTBUS.
Background
With the rapid development of economy of various countries, the global energy demand is remarkably increased, the limited traditional energy is difficult to meet the demand in the near future, and the development and utilization of renewable energy are more urgent in addition to the proposal of the 'carbon reduction' target of various countries. Ocean accounting for 71% of the earth area is a treasury of green energy, ocean energy is considered as one of renewable energy sources with the largest reserves, and the ocean energy mainly comprises wave energy, tidal current energy, temperature difference energy, offshore wind power in a broad sense, ocean biomass energy, offshore floating photovoltaic and the like in a narrow sense, wherein no matter what power generation mode is needed, energy storage is needed to be carried out by means of an energy storage battery, but due to the fact that energy storage batteries of different manufacturers, different models and different years have certain differences in energy storage capacity and energy storage service life, the energy storage battery is comparable, no two identical leaves exist in the world, and even power supply units in the same energy storage battery have differences, the energy storage battery cannot be managed and controlled in a targeted manner.
At present, the China patent with the publication number of CN103227494B discloses an energy storage battery management system. The system adopts a distributed 3-layer management system, which comprises a bottom BMU, a middle BCMS and a top BAMS. The bottom BMU comprises a voltage temperature measurement module and a complementary electric discharge equalization module. The middle-layer BCMS is a core of the battery management system and comprises a voltage temperature processing module, an equalization control module, a relay control module, an AD acquisition module and a core parameter calculation module. The top BAMS comprises a battery information summarizing module, a system alarm information processing module, a BAMS_PCS communication module and a BAMS_upper monitoring system communication module. The three-layer structure of the system internally uses a CAN2.0B communication protocol to realize information transmission. BAMS and energy conversion PCS system and upper monitoring system communication all adopt modbusTCP protocol. The system comprises an energy storage system, an information acquisition device, a fault wave recording module, a calculation and control module and a battery control unit, wherein the energy storage system is characterized in that the energy storage system is composed of an environment variable acquisition module, an electricity side control module, a power generation side control module, an ammeter data acquisition module, a PCS control module and a battery control unit, when the system fails, the calculation and control module controls the fault wave recording module to record fault information, the fault information comprises information acquired by a plurality of modules in the information acquisition device at the system fault moment, and the calculation and control module analyzes and determines the fault responsibility corresponding to the fault based on the fault information. However, the residual service life of the energy storage battery pack cannot be fully utilized, and the problems of poor resource utilization and poor response efficiency exist.
However, in the implementation process of the technical scheme, at least the following technical problems are found:
Because the service life of the energy storage battery can also attenuate to different degrees under different service environments, common attenuation factors include high temperature aging, low temperature aging, heavy current charge and discharge, overvoltage/undervoltage charge and discharge and the like, the service life of the energy storage battery can be influenced, even the same batch of batteries produced by the same model and the same manufacturer can have differences, the differences can be increased along with the increase of service life or service environment, the service differences among the energy storage batteries are caused, the existing energy storage battery control system can only judge the quality of the energy storage battery by detecting the charge and discharge conditions of the energy storage battery, the detection is not comprehensive, and meanwhile, the real-time adjustment can not be carried out according to the conditions of the battery, so that some usable batteries are replaced, the utilization of resources is seriously influenced, secondly, the existing energy storage battery is mainly connected in series to form into a whole, the whole power supply unit is damaged, the whole energy storage battery can not be used, and the fault unit can only adopt a one-to-one investigation mode, so that the human power is wasted, and the energy storage system AUTBUS is provided.
Disclosure of Invention
(One) solving the technical problems
Aiming at the defects of the prior art, the invention provides an energy storage battery management system based on AUTBUS, which uses a AUTBUS network as a communication medium for data transmission, transmits acquired working parameters, can improve the efficiency of remote transmission and reduce the packet loss rate, obtains an energy storage health predicted value capable of judging the health condition of a power supply unit by comprehensively analyzing the working parameters of the energy storage unit, and controls the working state of a circuit switching unit according to the obtained energy storage health predicted value, thereby rapidly and accurately responding to the fault energy storage unit, and simultaneously reduces the influence range of maintenance and the difficulty of maintenance by utilizing the switching effect of the circuit switching unit, thereby solving the technical problem that the conventional energy storage battery management system cannot accurately and rapidly respond when the fault occurs.
(II) technical scheme
In order to achieve the above purpose, the invention is realized by the following technical scheme:
AUTBUS-based energy storage battery management system, the system comprising:
The parameter acquisition module is used for acquiring working parameters of the energy storage battery pack and the power supply unit by utilizing AUTBUS networks, wherein the working parameters comprise voltage, current and working temperature;
The power supply units are sequentially connected in series, and the circuit switching units are connected to the outside of the power supply units;
When the power supply unit fails or is maintained, a corresponding circuit switching unit is triggered, the front power supply unit and the rear power supply unit of the power supply unit are connected in series, and the standby power supply unit is accessed;
The parameter checking module is used for comparing the working parameters of the power supply unit with a preset parameter interval, and if the working parameters of the power supply unit are in the parameter interval, not responding, otherwise, sending out parameter early warning, and calling a circuit switching unit corresponding to the power supply unit according to the parameter early warning;
The energy storage checking module builds an energy storage battery calculation model according to the collected working parameters of the power supply unit to obtain the energy storage power of the energy storage battery pack, and compares the absolute value of the difference between the energy storage power and the working power of the energy storage battery pack with a preset standard threshold interval;
When the absolute value of the difference between the energy storage power and the working power of the energy storage battery pack exceeds a preset standard threshold value interval, a correction early warning is sent;
The data analysis module is used for calling and analyzing working parameters of the power supply units in the energy storage battery pack when the correction early warning is sent out, constructing a power supply unit analysis and calculation model, generating an energy storage health predicted value Gwk t, and sequentially starting a circuit switching unit corresponding to the fault power supply unit according to the size of the energy storage health predicted value Gwk t;
Stopping when the absolute value of the difference between the energy storage power and the working power of the energy storage battery pack is smaller than the median of the standard threshold interval;
the state evaluation module generates a state evaluation value Unq t of the fault power supply unit according to the working parameters before the fault power supply unit is disconnected and the corresponding energy storage health prediction value Gwk t, and opens the corresponding power supply strategy according to the size of the state evaluation value Unq t;
further, the system further comprises:
the balance regulation module is used for setting an upper limit current threshold and a lower limit current threshold according to the working parameters of the energy storage battery pack and comparing the upper limit current threshold and the lower limit current threshold with charging current sent by the power generation unit;
When the charging current is more than or equal to the upper limit current threshold value, a power supply circuit of the energy storage battery pack and the power generation unit is started;
when the charging current is less than the lower limit current threshold value, the power supply circuit of the energy storage battery pack and the power generation unit is disconnected;
And when the upper current threshold value is greater than or equal to the charging current threshold value, the charging current is not responded.
Further, the working temperature of the power supply unit is detected by the NTC thermistor, and the relation between the temperature and the resistance is converted into the relation between the temperature and the voltage, and the relation between the temperature and the voltage is as follows:
Wherein U t is the voltage of the thermistor at T temperature, I t is the current of the thermistor at T temperature, R t is the resistance of the thermistor at T temperature, R is the standard resistance of the thermistor at T N at normal temperature, e is a constant, and B is the thermal constant of the thermistor.
Further, the parameter acquisition module comprises an acquisition unit, a conversion unit and an edge control unit;
the system comprises an acquisition unit, a conversion unit, an edge control unit and a remote server, wherein the acquisition unit converts the existing industrial communication into AUTBUS communication through the conversion unit, the conversion unit performs networking through a AUTBUS bus and is connected into the edge control unit, and the edge control unit analyzes and processes working parameters and then sends the working parameters to the remote server.
Further, the energy storage power of the energy storage battery pack comprises a standard output power P out of and a standard load power P Negative pole , and the working parameters of the energy storage battery pack comprise a supply voltage U z and a supply current I z, according to the following formula:
Wherein U oc is the open circuit voltage of the power supply unit, I is the load current of the power supply unit, and n is the number of the power supply units in the energy storage battery pack;
wherein U d is the terminal voltage of the power supply unit;
When the absolute value P out of -P Negative pole -UzIz is greater than the standard threshold value, a correction early warning is sent out;
when the absolute value of P out of -P Negative pole -UzIz is less than or equal to the standard threshold value, no response is made.
Further, under the condition that the system sends correction early warning, working parameters of the power supply unit within the correction early warning duration t are obtained, and an energy storage health predicted value Gwk t and an energy storage health predicted value Gwk t are generated according to the following formula:
In the formula, For correcting the average value of the power supply unit temperature in the early warning duration t, P g is the power supply of the power supply unit, U max is the maximum value of the power supply unit terminal voltage U d in the early warning duration t, U min is the minimum value of the power supply unit terminal voltage U d in the early warning duration t, K, W, V is the preset weight coefficients of the power supply unit temperature, the power supply unit power supply and the power supply unit terminal voltage, respectively, and W > K > V >0, and a is a constant correction coefficient.
Further, the switching steps of the circuit switching unit are as follows:
Step one, sorting power supply units according to the size of an energy storage health predicted value Gwk t;
step two, sequentially starting the circuit switching units corresponding to the power supply units according to the sequence of the step one;
Step three, the energy storage power of the battery pack is recalculated while the circuit switching unit is started, and when the absolute value of the difference value between the energy storage power and the working power of the energy storage battery pack approaches to a standard threshold value interval, the working state of the circuit switching unit after being started is maintained;
And step four, stopping the response of the circuit switching unit until the absolute value of the difference value between the energy storage power and the working power of the energy storage battery pack is smaller than the median of the standard threshold interval.
Further, a state evaluation value Unq t of the faulty power supply unit is generated according to the following formula:
Wherein L r is the actual power capacity of the fault power supply unit, L b is the rated power capacity of the fault power supply unit, and C is a correction factor, 1> C >0;
Comparing the obtained state evaluation value Unq t with a preset loss threshold value set, wherein the loss threshold value set comprises a first loss threshold value and a second loss threshold value, and the first loss threshold value is smaller than the second loss threshold value;
When the state evaluation value Unq t is more than or equal to a second loss threshold value or Gwk t is less than 1, a first-level early warning is sent out, and a first-level power supply strategy is started;
When the second loss threshold > state evaluation value Unq t is more than or equal to the first loss threshold and Gwk t is more than 1, sending out a second-level early warning and starting a second-level power supply strategy;
When state evaluation value Unq t < first loss threshold and Gwk t >1, then no response is made.
Further, when the primary early warning signal is detected, a primary power supply strategy is executed, and the primary power supply strategy is executed as follows:
starting a circuit switching unit corresponding to the fault power supply unit, and stripping the fault power supply unit from the energy storage battery pack;
According to the number of stripping fault power supply units, the same number of standby power supply units are connected;
Detecting whether the working parameters of the energy storage battery pack return to a preset parameter interval, if the working parameters of the energy storage battery pack are within the preset parameter interval, executing a secondary power supply strategy, and if the working parameters of the energy storage battery pack are not within the preset parameter interval, closing the energy storage battery pack.
Further, the process when executing the secondary power supply strategy is as follows:
the upper energy storage limit Pc of the fault power supply unit is calculated according to the following formula:
Pc=ωn×Lb
wherein omega n is the energy storage of the nth year power supply unit;
When the electric energy capacity of the power supply unit reaches 90% of the upper energy storage limit Pc, starting a circuit switching unit corresponding to the power supply unit, stripping the power supply unit from the energy storage battery pack, and accessing the same number of standby power supply units according to the number of stripped power supply units;
And discharging, namely when the electric energy capacity of the power supply unit reaches 80% of the upper energy storage limit Pc, starting a circuit switching unit corresponding to the power supply unit, stripping the standby power supply unit from the energy storage battery pack, and then connecting the stripped power supply unit into the energy storage battery pack during charging.
(III) beneficial effects
1. According to the energy storage battery management system based on AUTBUS, the AUTBUS network is used as a communication medium for data transmission, the collected working parameters are transmitted, the efficiency of remote transmission can be improved, and the packet loss rate is reduced; the working parameters of the energy storage unit are comprehensively analyzed to obtain an energy storage health predicted value capable of judging the health condition of the power supply unit, and then the working state of the circuit switching unit is controlled according to the obtained energy storage health predicted value, so that the fault energy storage unit is rapidly and accurately responded, and meanwhile, the influence range of maintenance and the difficulty of maintenance are reduced by utilizing the switching effect of the circuit switching unit;
2. The working parameters before the fault power supply unit is disconnected and the corresponding energy storage health predicted value Gwk t are called to obtain a state estimated value Unq t of the fault power supply unit, and then the corresponding power supply strategy is called according to the obtained state estimated value Unq t, so that the energy storage unit is fully utilized, the loss of economy and resources is reduced, and meanwhile, the energy storage efficiency of the energy storage battery pack and the whole energy storage system is not influenced;
in summary, the system designed by the invention can realize omnibearing evaluation analysis on the power supply unit, and improve the energy utilization efficiency, the health management and maintenance capability of the battery and the stability evaluation capability of the energy storage power grid.
Drawings
The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings.
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a partial flow diagram of the present invention;
FIG. 3 is a hardware circuit diagram of the acquisition unit of the present invention;
FIG. 4 is a circuit diagram of an equalization circuit according to the present invention;
Fig. 5 is a schematic circuit diagram of the circuit switching unit of the present invention.
Detailed Description
The embodiment of the application solves the technical problem that the existing energy storage battery management system cannot respond accurately and rapidly when faults occur by providing the AUTBUS-based energy storage battery management system, uses a AUTBUS network as a communication medium for data transmission to transmit acquired working parameters, can improve the efficiency of remote transmission and reduce the packet loss rate, obtains an energy storage health predicted value capable of judging the health condition of a power supply unit by comprehensively analyzing the working parameters of the energy storage unit, and controls the working state of a circuit switching unit according to the obtained energy storage health predicted value, thereby responding the fault energy storage unit rapidly and accurately, and simultaneously reduces the influence range of maintenance and the difficulty of maintenance by utilizing the switching effect of the circuit switching unit.
Example 1
The technical scheme in the embodiment of the application aims to solve the technical problem that the existing energy storage battery management system cannot accurately and rapidly respond when a fault occurs, and the overall thought is as follows:
Hardware design
Acquisition circuit
In order to ensure the accuracy and reliability of the algorithm input variables, a BQ76940 battery monitoring chip is adopted to measure parameters such as voltage, temperature, current and the like of the battery pack. FIG. 3 is a schematic diagram of a BQ76940 and a peripheral circuit of an acquisition unit;
In the analog quantity acquisition unit, each battery (namely a power supply unit) of the battery pack is connected with pins VC 0-VC 15 of a BQ76940 chip after passing through an RC filter circuit, and finally 15 power supply unit voltages can be obtained. The charge-discharge current of the battery pack is obtained through sampling resistors in a current loop connected by the SRP and SRN pins.
In the aspect of temperature acquisition, an NTC thermistor with the resistance value of 10 kiloohms is connected through TS 1-TS 3 pins, and the temperature is converted into the relation between the temperature and the acquired voltage according to the relation between the temperature and the resistance value, so that the battery temperature is obtained. The relationship between temperature and voltage is as follows:
Ut＝It×Rt(1-1)
wherein U t is the voltage of the thermistor at T temperature, I t is the current of the thermistor at T temperature, R t is the resistance of the thermistor at T temperature, R is the standard resistance of the thermistor at T N at normal temperature, e is a constant, e=2.71828, and B is the thermal constant of the thermistor, and the formula (1-1) and the formula (1-2) are combined to obtain the relational expression between the temperature and the voltage of the formula (1-3):
communication mode
CAN communication is carried out with the controller through SCL and SDA pins, and battery voltage, current and temperature data are transmitted to the controller for processing.
In order to ensure transmission stability, the CAN communication network is connected to the CAN-to-AUTBUS signal converter, the signal converter is connected to the edge controller through the AUTBUS bus for network connection, and the edge controller analyzes and processes working parameters and then sends the working parameters to the remote server. After data is converted into AUTBUS communication through CAN, the problems of low communication speed and short transmission distance in CAN communication are solved. The signal converter nodes in the system are connected in a linear topological structure mode, and terminal resistors are matched at the signal converter nodes at the head end and the tail end, so that data long-distance and high-speed transmission is realized, and the packet loss rate is reduced. Because of the nonpolar twisted pair connection characteristic of AUTBUS, the on-site wiring and construction are simpler and more convenient, the communication faults caused by reverse wiring are avoided, and the debugging work is reduced.
Equalization circuit
In order to solve the problem of non-uniform cell voltages, schematic diagrams of the equalization units are shown in fig. 4-5. The circuit consists of 15 pairs of MOS tubes, and two ends of 15 battery units are respectively connected in parallel. One group of MOS tubes is controlled by PWM signals, the other group of MOS tubes is controlled by complementary PWM signals, and the two groups of MOS tubes are alternately complementary.
The MOS transistors of the circuit are arranged in pairs, for example, Q 1,Q2,Q3…,Q30 is 15 pairs in total, and the MOS transistors are respectively connected in parallel at two ends of 15 battery units. One group of MOS tubes (Q 1,Q3,Q5…,Q27,Q29) is controlled by one control signal, the other group of MOS tubes (Q 2,Q4,Q6…,Q28,Q30) is controlled by the other complementary control signal, and the two groups of MOS tubes are alternately complementary. Taking the equalization process of the battery unit 1 as an example, when the lower tube (Q 1～Q15) of each pair of MOS tubes is opened and the upper tube (Q 2～Q16) is closed, the battery strings (batteries 1-7) are connected in parallel with the equalization capacitor Cap 1. When the upper tube (Q 2～Q16) of each pair of MOS tubes is opened and the lower tube (Q 1～Q15) is closed, the battery string (BAT 2～BAT8) is connected in parallel with the balance capacitor Cap 1. In this process, the battery 1 and the battery 8 are balanced with each other by the capacitor Cap1, and the balanced current is as shown in formula (4-1).
The voltage of the single battery is used as an equalization control variable, whether the difference value between the highest value and the lowest value of the voltage of each battery is larger than 50MV is calculated, when the difference value is larger than 50MV, the phenomenon that the battery pack is unbalanced at the moment is indicated, and the DSP controller controls the MOS tube signal driving circuit by using PWM with the duty ratio of 50%, so that the 15 battery packs are equalized finally.
In the above formulas (2-1) and (2-2), R b is the equivalent resistance of the equalization circuit in ohms, where f is the switching frequency in hertz, C is the capacitance, and in farads. V BAT1 t and V BAT8 t are the voltages of battery 1 and battery 8, respectively, in volts, and i BAT1 t is the equilibrium current of the battery, in amperes. Because the structure of the equalization circuit is divided into an upper part and a lower part taking the battery 8 as a center, the batteries 2-7 and 9-15 can be equalized with the battery 8, and finally, the function of equalizing the voltages of the 15 series battery packs is achieved. Compared with the traditional switched capacitor equalization circuit, the equalization circuit has the advantages of high equalization speed and high equalization efficiency.
Circuit switching unit
Referring to fig. 4 and 5, a single pole double throw switch S is connected to a connection line between two adjacent power supply units, and a branch line connected in parallel with the power supply units is connected to a contact a on the main line in a normally closed state of the switch S, and current passes through the power supply unit connected in series with the contact a;
And the switch S is connected with the contact b of the branch line in a normally open state, at this time, current enters the branch line through the switch S, and bypasses the power supply unit through the branch line, so that the power supply unit is removed from the power supply line.
When the power supply unit fails or is maintained, the corresponding circuit switching unit is triggered, the front power supply unit and the rear power supply unit are connected in series and are connected into the standby power supply unit, a solution basis is provided for subsequent adjustment, the number of the standby power supply units is set up according to the needs, when the energy storage battery pack works normally, the circuit switching unit corresponding to the standby power supply unit is always in a normally open state (namely, the switch S is connected with the contact b of the branch line), and only when one or more power supply units of the energy storage battery pack are damaged, the circuit switching unit is started, so that the standby power supply unit is connected, and the whole constancy of the energy storage system is ensured.
Software design
Preliminary data alignment
In order to perform preliminary auditing on the uploaded working parameters, the working parameters of the power supply unit are compared with preset parameter intervals, if the working parameters of the power supply unit are in the parameter intervals, no response is made, otherwise, parameter early warning is sent out, and a circuit switching unit corresponding to the power supply unit is called according to the parameter early warning.
The working parameters of the power supply unit mainly comprise an open circuit voltage U oc, a load current I, a terminal voltage U d, a working temperature T d and the like, wherein the open circuit voltage U oc = [3V,4.2V ], the load current I= [11A,15A ], the terminal voltage U d = [2.8V,3.6V ], the working temperature T d = [0 ℃ and 50 ℃ and the like, and when the obtained value is not in a preset parameter interval, the obtained value is counted as abnormal data, and early warning is directly sent out.
The circuit switching unit can be used at this time, and the front power supply unit and the rear power supply unit are connected in series, as shown in fig. 5, and the standby power supply unit is accessed, so that time can be provided for repair, and the normal operation of the energy storage battery can not be influenced.
Stored energy power detection
According to the collected working parameters of the power supply unit, an energy storage battery calculation model is built, the energy storage power of the energy storage battery pack is obtained, and the absolute value of the difference value between the energy storage power and the working power of the energy storage battery pack is compared with a preset standard threshold value interval;
And when the absolute value of the difference between the energy storage power and the working power of the energy storage battery pack exceeds a preset standard threshold interval, a correction early warning is sent out, namely |P out of -P Negative pole -UzIz | > a standard threshold value, and otherwise, when |P out of -P Negative pole -UzIz | is less than or equal to the standard threshold value, no response is made, wherein U z is the supply voltage of the energy storage battery, I z is the supply current of the energy storage battery, P out of is the standard output power, P Negative pole is the standard load power, and the energy storage power=standard output power P out of -standard load power P Negative pole ,UzIz of the energy storage battery pack represents the energy storage power of the energy storage battery, namely the energy storage power=U zIz.
Standard output power P out of and standard load power P Negative pole are based on the following formulas:
Wherein U oc is the open circuit voltage of the power supply unit, I is the load current of the power supply unit, and n is the number of the power supply units in the energy storage battery pack;
wherein U d is the terminal voltage of the power supply unit.
Data analysis
When the correction early warning is sent out, the working parameters of the power supply units in the energy storage battery pack are called and analyzed, a power supply unit analysis and calculation model is built, an energy storage health predicted value Gwk t is generated, and the circuit switching units corresponding to the fault power supply units are sequentially started according to the size of the energy storage health predicted value Gwk t.
The method comprises the steps of sorting power supply units according to the size of an energy storage health predicted value Gwk t, sequentially starting circuit switching units corresponding to the power supply units according to the sorted order, recalculating the energy storage power of a battery pack while starting the circuit switching units, keeping the working state of the circuit switching units after the circuit switching units are started when the absolute value of the difference between the energy storage power and the working power of the energy storage battery pack approaches to a standard threshold interval, removing the next sequential power supply unit according to the order until the absolute value of the difference between the energy storage power and the working power of the energy storage battery pack is smaller than the median of the standard threshold interval, and stopping responding by the circuit switching units.
The method includes the steps that when the absolute value of the difference value between the energy storage power and the working power of the energy storage battery pack approaches to a standard threshold value interval, the removed power supply units are described to have influence on the whole operation of the energy storage battery pack, and the influence degree of the power supply units on the energy storage battery pack can be distinguished according to the approaching degree.
By acquiring the working parameters of the power supply unit within the correction early warning duration t, an energy storage health predicted value Gwk t is generated, and the formula according to which the energy storage health predicted value Gwk t is based is as follows:
In the formula, For correcting the average value of the power supply unit temperature in the early warning duration t, P g is the power supply of the power supply unit, U max is the maximum value of the power supply unit terminal voltage U d in the early warning duration t, U min is the minimum value of the power supply unit terminal voltage U d in the early warning duration t, K, W, V is the preset weight coefficients of the power supply unit temperature, the power supply unit power supply and the power supply unit terminal voltage, respectively, and W > K > V >0, and a is a constant correction coefficient.
Wherein the power supply power P g of the power supply unit = the output power of the power supply unit (IU oc) -the load power of the power supply unit (IU d-IUoc).
In the formula, T is a correction early-warning duration (taking seconds as a unit, 1s is a period, for example, correction early-warning duration is 50s, then t=50), i is a positive integer, T d is a power supply unit temperature, and all temperature data in the correction early-warning duration are added and divided by all time periods.
When Gwk t <1, the fault power supply unit is seriously damaged, and the energy storage work of the energy storage circuit cannot be matched normally, at the moment, the circuit switching unit corresponding to the fault power supply unit is started, the fault power supply unit is stripped from the energy storage battery pack, and the same number of standby power supply units are connected according to the number of stripped fault power supply units, so that the output stability of the energy storage battery is ensured, and the situation that the energy storage battery stops working and can be repaired is avoided.
The weight coefficient is set by calculating the weight coefficient K at 25 ℃ and the power supply unit terminal voltage U d under the condition that the terminal voltage of the power supply unit and the power supply unit power are unchanged when a certain single parameter is changed, the power supply unit load current I, the power supply unit power P g＝Ud xI, the initial temperature of the power supply unit terminal voltage U d and the power supply unit load current I is kept unchanged, the service life of the lithium battery is X 1, the service life of the lithium battery is X 2 at 25+T L ℃, and the service life of the lithium battery is X 3,TL at 25-T L ℃ to represent the temperature change.
Similarly, the preset weight coefficient W, V of the power supply unit power P g and the power supply unit terminal voltage U d can be calculated.
Resolution strategy
According to working parameters before the fault power supply unit is disconnected and corresponding energy storage health prediction values Gwk t, a state evaluation value Unq t of the fault power supply unit is generated, so that the fault power supply unit is classified into three types, namely, one type is unavailable and needs to be timely removed from an energy storage battery pack, the other type is qualified type, certain deviation possibly occurs due to different conditions reflected by the power supply unit during detection of the power supply unit, so that the power supply unit which can be normally used is possibly caused to be faulty, and the energy storage battery pack needs to be re-connected;
A state evaluation value Unq t of the faulty power supply unit is generated according to the following formula:
Wherein, L r is the actual power capacity of the fault power supply unit, L b is the rated power capacity of the fault power supply unit, C is a correction factor, 1> C >0,1> Unq t >0, and when Unq t is more than or equal to 1, the value is recorded as Unq t =1, and the fault power supply battery is completely damaged at the moment;
Comparing the obtained state evaluation value Unq t with a preset loss threshold value set, wherein the loss threshold value set comprises a first loss threshold value and a second loss threshold value, and the first loss threshold value is smaller than the second loss threshold value;
When the state evaluation value Unq t is more than or equal to the second loss threshold value and Gwk t is more than 1, a first-level early warning is sent out, and a first-level power supply strategy is started.
When the second loss threshold > state evaluation value Unq t is more than or equal to the first loss threshold and Gwk t is more than 1, sending out a second-level early warning and starting a second-level power supply strategy;
When state evaluation value Unq t < first loss threshold and Gwk t >1, then no response is made.
When the first-level early warning signal is detected, executing a first-level power supply strategy, wherein the process of executing the first-level power supply strategy is as follows:
starting a circuit switching unit corresponding to the fault power supply unit, and stripping the fault power supply unit from the energy storage battery pack;
According to the number of stripping fault power supply units, the same number of standby power supply units are connected to balance the internal functional systems of the energy storage battery pack;
Detecting whether the working parameters of the energy storage battery pack return to a preset parameter interval, if the working parameters of the energy storage battery pack are within the preset parameter interval, executing a secondary power supply strategy to indicate that the replaced power supply unit plays a role, wherein the replaced power supply unit is in a fault state at the moment, and distinguishing the fault state again (judging whether the power supply unit belongs to a qualified class or a residual class between the qualified class and an unavailable class) is needed, and if the working parameters of the energy storage battery pack are not within the preset parameter interval, closing the energy storage battery pack.
And when the second-level early warning signal is detected, executing a second-level power supply strategy as follows:
the upper energy storage limit Pc of the fault power supply unit is estimated according to the following formula:
Pc=(1-Unqt)×Lb
When the energy storage upper limit Pc of the fault power supply unit is smaller than or equal to 50% of the rated power capacity L b of the fault power supply unit, a replacement early warning is sent out to remind a worker of timely replacement;
When the energy storage upper limit Pc of the fault power supply unit is greater than 50% of the rated power capacity L b of the fault power supply unit, executing the following charging strategy and discharging strategy;
When the power capacity of the power supply unit reaches 90% of the upper energy storage limit Pc during charging, starting a circuit switching unit corresponding to the power supply unit, stripping the power supply unit from the energy storage battery pack, and accessing the same number of standby power supply units according to the number of stripped power supply units, wherein the power capacity of the fault power supply unit is kept at 90% of the upper energy storage limit Pc at the moment, so that overshoot is avoided;
When the power capacity of the power supply unit reaches 80% of the upper energy storage limit Pc during discharging, a circuit switching unit corresponding to the power supply unit is started, the standby power supply unit is stripped from the energy storage battery pack, and the stripped power supply unit is connected into the energy storage battery pack during charging, at the moment, the power capacity of the fault power supply unit is larger than that of the adjacent power supply unit, and reverse charging is avoided.
And the back charging is that the electromotive force of the old battery is reduced, the internal resistance of the old battery is increased, the new battery and the old battery are analyzed through the ohm law of a whole circuit, after the new battery and the old battery are connected in series for use, the actual consumed power of the old battery is larger than the power provided by the old battery through calculation, and the power is equal to the power consumed by the old battery which is reversely formed into an electric appliance.
During daily charging, because the generating efficiency of the generating unit is not constant, and the voltage is regulated and controlled by a voltage stabilizer between the generating unit and the energy storage battery pack, current unbalance of the energy storage battery is caused, for example, the generating power of the photovoltaic generating unit in strong light weather is different from the generating power of the energy storage battery in cloudy weather, the current received by the energy storage battery is not constant, and therefore, an upper current limit threshold value and a lower current limit threshold value are set according to the working parameters of the energy storage battery pack and are compared with charging current generated by the generating unit;
when the charging current is more than or equal to the upper limit current threshold value, a power supply circuit of the energy storage battery pack and the power generation unit is started, and the charging current reaches a charging standard at the moment, so that the current is connected into the energy storage battery pack;
When the charging current is less than the lower limit current threshold value, the power supply circuit of the energy storage battery pack and the power generation unit is disconnected, and the charging current does not reach the charging standard at the moment, so that the power connection is disconnected;
when the upper limit current threshold value is greater than or equal to the lower limit current threshold value, no response is made, buffering is provided for current fluctuation, and repeated switching is avoided.
Example 2
Based on embodiment 1, the energy storage battery management method based on AUTBUS comprises the following steps:
collecting working parameters of the energy storage battery pack and the power supply unit by utilizing AUTBUS networks, wherein the working parameters comprise voltage, current and working temperature;
The power supply units are sequentially connected in series, and the circuit switching units are connected to the outside of the power supply units;
When the power supply unit fails or is maintained, a corresponding circuit switching unit is triggered, the front power supply unit and the rear power supply unit of the power supply unit are connected in series, and the standby power supply unit is accessed;
Comparing the working parameters of the power supply unit with a preset parameter interval, and if the working parameters of the power supply unit are in the parameter interval, not responding, otherwise, giving out parameter early warning, and calling a circuit switching unit corresponding to the power supply unit according to the parameter early warning;
According to the collected working parameters of the power supply unit, an energy storage battery calculation model is built, the energy storage power of the energy storage battery pack is obtained, and the absolute value of the difference value between the energy storage power and the working power of the energy storage battery pack is compared with a preset standard threshold value interval;
When the absolute value of the difference between the energy storage power and the working power of the energy storage battery pack exceeds a preset standard threshold value interval, a correction early warning is sent;
When a correction early warning is sent out, the working parameters of the power supply units in the energy storage battery pack are called and analyzed, a power supply unit analysis and calculation model is built, an energy storage health predicted value Gwk t is generated, and circuit switching units corresponding to the fault power supply units are sequentially started according to the size of the energy storage health predicted value Gwk t;
Stopping when the absolute value of the difference between the energy storage power and the working power of the energy storage battery pack is smaller than the median of the standard threshold interval;
Generating a state evaluation value Unq t of the fault power supply unit according to the working parameters before the fault power supply unit is disconnected and the corresponding energy storage health prediction value Gwk t, and starting a corresponding power supply strategy according to the size of the state evaluation value Unq t;
setting an upper current limit threshold and a lower current limit threshold according to working parameters of the energy storage battery pack, and comparing the upper current limit threshold and the lower current limit threshold with charging current sent by the power generation unit;
When the charging current is more than or equal to the upper limit current threshold value, a power supply circuit of the energy storage battery pack and the power generation unit is started;
when the charging current is less than the lower limit current threshold value, the power supply circuit of the energy storage battery pack and the power generation unit is disconnected;
And when the upper current threshold value is greater than or equal to the charging current threshold value, the charging current is not responded.
In the application, the related formulas are all the numerical calculation after dimensionality removal, and the formulas are one formulas for obtaining the latest real situation by software simulation through collecting a large amount of data, and the formulas are set by a person skilled in the art according to the actual situation.
The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any other combination. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application.

Claims (7)

1.基于AUTBUS的储能电池管理系统，其特征在于，该系统包括：1. An energy storage battery management system based on AUTBUS, characterized in that the system comprises: 参数采集模块，利用AUTBUS网络采集储能电池组以及供电单元的工作参数，工作参数包括电压、电流、工作温度；The parameter acquisition module uses the AUTBUS network to collect the working parameters of the energy storage battery pack and the power supply unit. The working parameters include voltage, current, and working temperature; 其中，储能电池组由若干供电单元依次串联而成，且供电单元的外部连接有电路切换单元；The energy storage battery pack is composed of a number of power supply units connected in series, and the power supply units are externally connected to a circuit switching unit; 在供电单元故障或维修时，触发对应的电路切换单元，将该供电单元前后两个供电单元串联，并接入备用供电单元；When a power supply unit fails or is under maintenance, the corresponding circuit switching unit is triggered to connect the two power supply units before and after the power supply unit in series and connect to the standby power supply unit; 储能电池组工作参数包括供电电压Uz和供电电流Iz，储能电池组的储能功率包括标准输出功率P出以及标准负载功率P负，所述标准输出功率P出和标准负载功率P负所依据的公式如下：The working parameters of the energy storage battery pack include the supply voltage Uz and the supply current Iz . The energy storage power of the energy storage battery pack includes the standard output power Pout and the standard load power Pneg . The formulas based on the standard output power Pout and the standard load power Pneg are as follows: 式中，Uoc为供电单元的开路电压，I为供电单元的负载电流，n为储能电池组中供电单元的数量；In the formula, U oc is the open circuit voltage of the power supply unit, I is the load current of the power supply unit, and n is the number of power supply units in the energy storage battery pack; 式中，Ud为供电单元的端电压；Where, Ud is the terminal voltage of the power supply unit; 当|P出-P负-UzIz|＞标准阈值时，则发出矫正预警；When |P out - P minus - U z I z |> the standard threshold, a correction warning is issued; 当|P出-P负-UzIz|≤标准阈值时，则不作响应；When |P out - P minus - U z I z |≤ standard threshold, no response is made; 参数核对模块：将供电单元的工作参数与预设的参数区间对比，若供电单元的工作参数在参数区间内，则不做响应；反之，则发出参数预警；并根据参数预警，调取与该供电单元对应的电路切换单元；Parameter verification module: compares the working parameters of the power supply unit with the preset parameter range. If the working parameters of the power supply unit are within the parameter range, no response is made; otherwise, a parameter warning is issued; and according to the parameter warning, the circuit switching unit corresponding to the power supply unit is called; 储能核对模块：依据采集的供电单元工作参数，搭建储能电池计算模型，得到储能电池组的储能功率，并将储能功率与储能电池组工作功率之间差值的绝对值，同预设的标准阈值区间对比；Energy storage verification module: Based on the collected working parameters of the power supply unit, an energy storage battery calculation model is built to obtain the energy storage power of the energy storage battery group, and the absolute value of the difference between the energy storage power and the working power of the energy storage battery group is compared with the preset standard threshold range; 在储能功率与储能电池组工作功率之间差值的绝对值，超过预设的标准阈值区间时，发出矫正预警；When the absolute value of the difference between the energy storage power and the working power of the energy storage battery pack exceeds the preset standard threshold range, a correction warning is issued; 数据分析模块：在发出矫正预警时，调取并对该储能电池组中供电单元的工作参数进行分析，搭建供电单元分析计算模型，生成储能健康预测值Gwkt，依据储能健康预测值Gwkt的大小依次开启故障供电单元对应的电路切换单元；Data analysis module: when a correction warning is issued, the working parameters of the power supply unit in the energy storage battery pack are retrieved and analyzed, a power supply unit analysis and calculation model is built, and the energy storage health prediction value Gwk t is generated. According to the size of the energy storage health prediction value Gwk t , the circuit switching units corresponding to the faulty power supply unit are opened in sequence; 在系统发出矫正预警的条件下，获取矫正预警持续时间t内供电单元的工作参数，生成储能健康预测值Gwkt，储能健康预测值Gwkt所依据的公式如下：Under the condition that the system issues a correction warning, the working parameters of the power supply unit within the correction warning duration t are obtained to generate the energy storage health prediction value Gwk t . The formula for the energy storage health prediction value Gwk t is as follows: 式中，为矫正预警持续时间t内供电单元温度Td的平均值，Pg为供电单元的供电功率，Umax为矫正预警持续时间t内供电单元端电压Ud的最大值，Umin为矫正预警持续时间t内供电单元端电压Ud的最小值，K、W、V分别为供电单元温度、供电单元供电功率以及供电单元端电压的预设权重系数，且W＞K＞V＞0，A为常数修正系数；In the formula, is the average value of the power supply unit temperature Td within the correction warning duration t, Pg is the power supply power of the power supply unit, Umax is the maximum value of the power supply unit terminal voltage Ud within the correction warning duration t, Umin is the minimum value of the power supply unit terminal voltage Ud within the correction warning duration t, K, W, V are the preset weight coefficients of the power supply unit temperature, the power supply unit power and the power supply unit terminal voltage respectively, and W＞K＞V＞0, A is the constant correction coefficient; 当Gwkt＜1时，开启该供电单元对应的电路切换单元，将该供电单元从储能电池组中剥离，根据剥离供电单元的数量，接入相同数量的备用供电单元；When Gwk t <1, the circuit switching unit corresponding to the power supply unit is turned on, the power supply unit is stripped from the energy storage battery pack, and the same number of backup power supply units are connected according to the number of stripped power supply units; 在储能功率与储能电池组工作功率之间差值的绝对值小于标准阈值区间的中位数时，停止；When the absolute value of the difference between the energy storage power and the working power of the energy storage battery group is less than the median of the standard threshold range, stop; 状态评估模块：依据故障供电单元断开前的工作参数以及对应的储能健康预测值Gwkt，生成故障供电单元的状态评估值Unqt，并按照状态评估值Unqt的大小开启对应的供电策略；State assessment module: generates a state assessment value Unq t of the faulty power supply unit based on the working parameters of the faulty power supply unit before disconnection and the corresponding energy storage health prediction value Gwk t , and starts the corresponding power supply strategy according to the size of the state assessment value Unq t ; 生成故障供电单元的状态评估值Unqt，所依据的公式如下：The state evaluation value Unq t of the faulty power supply unit is generated according to the following formula: 式中，Lr为故障供电单元的实际电能容量，Lb为故障供电单元的额定电能容量，C为修正因子，且1＞C＞0，1＞Unqt＞0；Wherein, Lr is the actual power capacity of the faulty power supply unit, Lb is the rated power capacity of the faulty power supply unit, C is the correction factor, and 1＞C＞0, 1＞ Unqt ＞0; 将得到的状态评估值Unqt与预设的损耗阈值组进行比对，损耗阈值组包括第一损耗阈值和第二损耗阈值，且第一损耗阈值＜第二损耗阈值；Compare the obtained state evaluation value Unq t with a preset loss threshold group, where the loss threshold group includes a first loss threshold and a second loss threshold, and the first loss threshold is less than the second loss threshold; 当状态评估值Unqt≥第二损耗阈值，且Gwkt＞1时，则发出一级预警，并开启一级供电策略；When the status evaluation value Unq t ≥ the second loss threshold and Gwk t ＞1, a first-level warning is issued and a first-level power supply strategy is started; 当第二损耗阈值＞状态评估值Unqt≥第一损耗阈值，且Gwkt＞1时，则发出二级预警，并开启二级供电策略；When the second loss threshold value> the state assessment value Unq t ≥ the first loss threshold value, and Gwk t > 1, a second-level warning is issued and the second-level power supply strategy is activated; 当状态评估值Unqt＜第一损耗阈值，且Gwkt＞1时，则不做响应。When the state evaluation value Unq t < the first loss threshold and Gwk t > 1, no response is made. 2.如权利要求1所述的基于AUTBUS的储能电池管理系统，其特征在于：该系统还包括：2. The AUTBUS-based energy storage battery management system according to claim 1, characterized in that the system further comprises: 均衡调控模块：根据储能电池组的工作参数设置上限电流阈值和下限电流阈值，并与发电单元发出充电电流比对；Balance control module: sets the upper and lower current thresholds according to the working parameters of the energy storage battery pack, and compares them with the charging current sent by the power generation unit; 当充电电流≥上限电流阈值时，则开启储能电池组与发电单元的供电电路；When the charging current is ≥ the upper current threshold, the power supply circuit of the energy storage battery group and the power generation unit is turned on; 当充电电流＜下限电流阈值时，则断开储能电池组与发电单元的供电电路；When the charging current is less than the lower current threshold, the power supply circuit between the energy storage battery pack and the power generation unit is disconnected; 当上限电流阈值＞充电电流≥下限电流阈值时，则不做响应。When the upper current threshold > charging current ≥ lower current threshold, no response is made. 3.如权利要求1或2任一所述的基于AUTBUS的储能电池管理系统，其特征在于：供电单元的工作温度通过NTC热敏电阻进行检测，并将温度与阻值之间的关系式转换为温度与电压之间的关系式，温度与电压之间的关系式如下：3. The AUTBUS-based energy storage battery management system according to any one of claims 1 or 2, characterized in that: the operating temperature of the power supply unit is detected by an NTC thermistor, and the relationship between the temperature and the resistance is converted into a relationship between the temperature and the voltage, and the relationship between the temperature and the voltage is as follows: 式中,Ut为热敏电阻在T温度下的电压，It为热敏电阻在T温度下的电流，Rt为热敏电阻在T温度下的阻值，R为热敏电阻在TN常温下的标准阻值，e为常数，B为热敏电阻的热敏常数。Where Ut is the voltage of the thermistor at temperature T, It is the current of the thermistor at temperature T, Rt is the resistance of the thermistor at temperature T, R is the standard resistance of the thermistor at room temperature TN , e is a constant, and B is the thermal constant of the thermistor. 4.如权利要求1所述的基于AUTBUS的储能电池管理系统，其特征在于：参数采集模块包括采集单元、转换单元和边缘控制单元；4. The AUTBUS-based energy storage battery management system according to claim 1, characterized in that: the parameter acquisition module includes an acquisition unit, a conversion unit and an edge control unit; 其中，在采集单元处于工作状态时，同时触发转换单元和边缘控制单元，转换单元将采集的数据以AUTBUS通讯的方式上传至边缘控制单元，再由边缘控制单元对工作参数进行分析处理后，发送到远程服务器端。When the acquisition unit is in working state, the conversion unit and the edge control unit are triggered at the same time. The conversion unit uploads the collected data to the edge control unit via AUTBUS communication, and the edge control unit analyzes and processes the working parameters and sends them to the remote server. 5.如权利要求1所述的基于AUTBUS的储能电池管理系统，其特征在于：电路切换单元的切换步骤如下：5. The AUTBUS-based energy storage battery management system according to claim 1, characterized in that: the switching steps of the circuit switching unit are as follows: 步骤一：依据储能健康预测值Gwkt的大小对供电单元进行排序；Step 1: Sort the power supply units according to the size of the energy storage health prediction value Gwk t ; 步骤二：按照步骤一所排顺序，依次开启供电单元对应的电路切换单元；Step 2: Turn on the circuit switching units corresponding to the power supply units in sequence according to the order in step 1; 步骤三：在开启电路切换单元的同时，重新计算电池组的储能功率，当储能功率与储能电池组工作功率之间差值的绝对值趋近于标准阈值区间时，保持该电路切换单元开启后的工作状态；Step 3: while turning on the circuit switching unit, recalculate the energy storage power of the battery pack, and when the absolute value of the difference between the energy storage power and the working power of the energy storage battery pack approaches the standard threshold range, keep the working state of the circuit switching unit turned on; 步骤四：直至储能功率与储能电池组工作功率之间差值的绝对值小于标准阈值区间的中位数，电路切换单元停止响应。Step 4: until the absolute value of the difference between the energy storage power and the working power of the energy storage battery pack is less than the median of the standard threshold range, the circuit switching unit stops responding. 6.如权利要求1所述的基于AUTBUS的储能电池管理系统，其特征在于：在检测到一级预警信号时，执行一级供电策略，执行一级供电策略的过程如下：6. The AUTBUS-based energy storage battery management system according to claim 1 is characterized in that: when a level one warning signal is detected, a level one power supply strategy is executed, and the process of executing the level one power supply strategy is as follows: 开启故障供电单元对应的电路切换单元，将故障供电单元从储能电池组中剥离；Open the circuit switching unit corresponding to the faulty power supply unit to separate the faulty power supply unit from the energy storage battery pack; 根据剥离故障供电单元的数量，接入相同数量的备用供电单元；According to the number of faulty power supply units removed, the same number of backup power supply units are connected; 检测储能电池组的工作参数是否回归到预设的参数区间，若储能电池组的工作参数在预设的参数区间内，则执行二级供电策略；若储能电池组的工作参数不在预设的参数区间内，则关闭该储能电池组。Detect whether the working parameters of the energy storage battery group return to the preset parameter range. If the working parameters of the energy storage battery group are within the preset parameter range, execute the secondary power supply strategy; if the working parameters of the energy storage battery group are not within the preset parameter range, shut down the energy storage battery group. 7.如权利要求1所述的基于AUTBUS的储能电池管理系统，其特征在于：执行二级供电策略时的过程如下：7. The AUTBUS-based energy storage battery management system according to claim 1 is characterized in that the process of executing the secondary power supply strategy is as follows: 预估故障供电单元的储能上限Pc，所依据的公式如下：The formula for estimating the upper limit of energy storage Pc of the faulty power supply unit is as follows: Pc＝(1-Unqt)×Lb Pc＝(1-Unq t )×L b 当故障供电单元的储能上限Pc小于或等于故障供电单元的额定电能容量Lb的50％时，则发出更换预警；When the energy storage upper limit Pc of the faulty power supply unit is less than or equal to 50% of the rated power capacity Lb of the faulty power supply unit, a replacement warning is issued; 当故障供电单元的储能上限Pc大于故障供电单元的额定电能容量Lb的50％时，则执行以下充电策略和放电策略；When the energy storage upper limit Pc of the faulty power supply unit is greater than 50% of the rated power capacity Lb of the faulty power supply unit, the following charging strategy and discharging strategy are executed; 充电时，当供电单元的电能容量达到储能上限Pc的90％时，开启供电单元对应的电路切换单元，将该供电单元从储能电池组中剥离，根据剥离供电单元的数量，接入相同数量的备用供电单元；During charging, when the power capacity of the power supply unit reaches 90% of the energy storage upper limit Pc, the circuit switching unit corresponding to the power supply unit is turned on to remove the power supply unit from the energy storage battery pack, and the same number of backup power supply units are connected according to the number of removed power supply units; 放电时，当供电单元的电能容量达到储能上限Pc的80％时，开启供电单元对应的电路切换单元，将备用供电单元从储能电池组中剥离，再将充电时剥离的供电单元接入储能电池组。During discharge, when the power capacity of the power supply unit reaches 80% of the energy storage upper limit Pc, the circuit switching unit corresponding to the power supply unit is turned on, the backup power supply unit is separated from the energy storage battery pack, and then the power supply unit separated during charging is connected to the energy storage battery pack.
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