CN112531224A - Battery management system and automatic address allocation method for battery management unit - Google Patents
Battery management system and automatic address allocation method for battery management unit Download PDFInfo
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- 238000009434 installation Methods 0.000 abstract description 5
- 238000007726 management method Methods 0.000 description 145
- 230000006870 function Effects 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5092—Address allocation by self-assignment, e.g. picking addresses at random and testing if they are already in use
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40215—Controller Area Network CAN
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40228—Modbus
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (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
When the power module supplies power to the battery cluster management unit and the first battery management unit, all the battery management units in the battery cluster sequentially set corresponding fixed addresses through the battery cluster management units according to the series connection sequence, and the automatic address allocation of the battery management units is realized through a hardware platform and a software function, the allocated fixed addresses are increased progressively according to the power-on sequence of the battery management units, and the one-to-one correspondence of the fixed addresses of the battery management units and the physical installation sequence is realized.
Description
Technical Field
The invention relates to the field of batteries, in particular to a battery management system and an automatic address allocation method for a battery management unit.
Background
In practical engineering, a battery management system of an energy storage power station generally manages a plurality of battery cluster management units, the number of the battery cluster management units is generally 1-5, and each battery cluster management unit controls the number of the battery management units of the plurality of battery management units to be generally less than 20. The battery management unit and the battery cluster management unit generally communicate with each other through a CAN bus. For CAN bus communication, each node needs to be configured with different physical addresses, and the current physical address configuration mode is divided into hardware setting and software setting.
The hardware sets up the address through dial switch, and the dress physical address can arrange according to the order when the device is installed, makes things convenient for fortune dimension personnel to operate, but the shortcoming increases dial switch cost and casing trompil cost, needs artifical dial when the field debugging, increases fortune dimension personnel maintenance cost.
The software setting stores the address in a chip data storage area, and the address setting is automatically realized through the software, but the defect is that the physical position of the device cannot be identified in the automatic setting process, and the condition that the sequence of the physical position of the device is not matched with the address exists, so that the physical address does not correspond to the actual installation position of the device.
Therefore, it is necessary to invent a new method and system for automatically allocating addresses of battery management units, so as to realize automatic setting of device addresses and keep the physical location sequence consistent with the automatically set addresses.
Disclosure of Invention
Objects of the invention
The invention aims to provide a battery management system and a method for automatically allocating addresses of battery management units, which realize automatic setting of device addresses and keep the sequence of physical positions consistent with the automatically set addresses.
(II) technical scheme
In order to solve the above problems, a first aspect of the present invention provides a battery management system, including a battery cluster management unit and a battery management unit, where the battery cluster management unit collects information of all battery management units in a battery cluster, the battery management unit is configured to manage batteries in a battery box, all the battery management units in the battery cluster are connected in series, a first battery management unit located at a head end is connected to a power module, the battery management unit sets a fixed address corresponding to the battery management unit through the battery cluster management unit after supplying power, and when the power module supplies power to the battery cluster management unit and the first battery management unit, the fixed addresses of the battery management units are incrementally allocated according to a power-on sequence of the battery management units in the battery cluster.
According to the first aspect of the present invention, the battery management unit is provided with a positive power supply electrode, a negative power supply electrode, a positive relay electrode and a negative relay electrode, the positive relay electrode and the negative relay electrode of the battery management unit are respectively connected to the positive power supply electrode and the negative power supply electrode of the next battery management unit, and the positive power supply electrode and the negative power supply electrode of the first battery management unit are respectively connected to the positive electrode and the negative electrode of the power supply module.
According to the first aspect of the present invention, after power is supplied, the battery management unit sets a corresponding fixed address, enters a normal operation mode, and then drives a relay in the battery management unit to operate, so as to supply power to a subsequent battery management unit.
According to the first aspect of the present invention, the battery management system further includes a system communication management unit that communicates with a plurality of the battery cluster management units.
A second aspect of the present invention provides a battery management unit address automatic allocation method for use in the battery management system according to any one of claims 1 to 4, characterized in that the method comprises
Firstly, a battery management unit inquires a unique identification code of a chip of the battery management unit, generates a temporary ID number according to the unique identification code and then sends specific broadcast information to a battery cluster management unit;
after receiving the broadcast information, the battery cluster management unit generates a fixed address of the battery management unit and sends the fixed address to the battery management unit corresponding to the temporary ID;
and step three, after receiving the fixed address, the battery management unit modifies the ID address of the battery management unit, stores the fixed address in an EEPROM area, and completes the address setting of the battery management unit.
According to the second aspect of the present invention, in the first step, the battery management unit determines whether a fixed address is allocated, and if so, the battery management unit operates normally; if not, reading the unique identification code of the user, generating a temporary ID number according to the unique identification code, and broadcasting information by using the temporary ID number.
According to the second aspect of the present invention, in the second step, the battery cluster management unit determines whether or not the information sent by the temporary ID is received, and if so, generates a fixed address by adding 1 to the last address, adds 1 to the number of fixed addresses, and then sends the fixed address information.
According to the second aspect of the present invention, in the second step, before determining whether to receive the information sent by the temporary ID, the battery cluster management unit first determines whether the number of the fixed addresses reaches a set value, and if so, the battery cluster management unit operates normally, otherwise, the battery cluster management unit determines whether to receive the information sent by the temporary ID.
According to a second aspect of the present invention, in step three, the battery management unit determines whether the information containing the fixed address is received, and if so, stores the fixed address in the EEPROM.
(III) advantageous effects
The technical scheme of the invention has the following beneficial technical effects:
the automatic address allocation of the battery management unit is realized through a hardware platform and a software function, the allocated fixed addresses are increased progressively according to the power-on sequence of the battery management unit, and the one-to-one correspondence between the fixed addresses of the battery management unit and the physical installation sequence is realized.
Drawings
Fig. 1 is a three-level architecture diagram of a prior art battery management system.
Fig. 2 is a battery management unit connection diagram according to an embodiment of the present invention.
Fig. 3 is a flowchart of a battery cluster management unit procedure according to an embodiment of the present invention.
Fig. 4 is a flowchart of a battery management unit process according to one embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
In a large-scale energy storage power station, a battery management system generally adopts a multi-string and three-stage architecture. As shown in fig. 1, the battery management system includes a system communication management unit 1, a battery cluster management unit 2, and a battery management unit 3, the system communication management unit 1 manages a plurality of battery cluster management units 2, and each battery cluster management unit 2 manages a plurality of battery management units 3.
The battery management unit 1 manages the batteries in the battery boxes 4, and each battery management unit corresponds to 1 battery box. The main functions of the battery management unit 1 include multi-channel single battery voltage monitoring, multi-channel temperature detection, online active bidirectional equalization, thermal management and the like. The battery management unit 1 adopts a module design, can be flexibly configured in the battery box 4, and is convenient for a user to operate, maintain, upgrade and expand.
The battery cluster management unit 2 collects information of all battery management units 1 in the whole cluster of batteries through a CAN bus, and the main functions of the battery cluster management unit 2 comprise the steps of obtaining information of each single battery from the battery management unit 1, collecting total voltage and total current of the whole cluster of batteries, estimating SOC of the cluster, estimating SOH of the cluster, monitoring insulation, alarming and protecting abnormal conditions of the battery cluster, controlling the on-off of the whole cluster of batteries and the like.
The system communication management unit 3 is communicated with the battery cluster management units 2 through a CAN bus, is communicated with the PCS6 through a MODBUS or CAN bus, and is communicated with the energy storage monitoring system 5 through IEC104 or IEC 61850. The main functions of the system communication management unit 3 include performing numerical calculation, performance analysis, alarm processing and recording on the battery real-time data uploaded by the battery cluster management unit 2, performing communication control with the PCS6 and the energy storage monitoring system 5, and configuring a liquid crystal display interface to realize human-computer interaction such as data monitoring (battery voltage, current, temperature, and the like), parameter setting, and the like.
Fig. 2 shows that a method and a system for setting the address of a battery management unit are provided, and the implementation process needs the cooperation of software and hardware. Fig. 2 is a battery management unit connection diagram according to an embodiment of the present invention. Taking 5 battery management units as an example, the 5 battery management units are connected in series. As shown in FIG. 2, the power supply of the battery management unit-1 is provided by a 24V power supply module, the positive and negative power supply terminals V +, V-of the battery management unit-1 are connected to the 24V power supply module through switches, the positive and negative relay terminals K +, K-of the battery management unit-1 are respectively connected to the positive and negative power supply terminals V +, V-of the battery management unit-2, the positive and negative relay terminals K +, K-of the battery management unit-2 are respectively connected to the positive and negative power supply terminals V +, V-of the battery management unit-3, and the battery management units-4 to-5 are sequentially connected in a similar manner. K + and K-are active output, and the output voltage is 24V.
It is understood that the battery management unit may adopt other hardware structures to implement all functions of the present invention, and is not limited to active output, for example, the active output on the battery management unit may be replaced by an external power module in combination with a passive output.
After the field installation is completed, the power supply is realized by software. The battery cluster management unit 2 and the battery management unit 1 both operate after being powered on. The battery management unit 1 first inquires the unique identification code of its own chip, and generates a temporary ID number based on the unique identification code, and then transmits specific broadcast information. After receiving the broadcast information, the battery cluster management unit generates a fixed address of the battery management unit and transmits the information to the battery management unit 1 corresponding to the temporary ID. After receiving the fixed address information, the battery management unit 1 modifies its own ID address and stores the address information in the EEPROM area. After the address setting is finished, the battery management unit 1 enters a normal working mode and drives the relay K to act, 24V is formed between K + and K-, and the relay K is just used for supplying power to the battery management unit 2. After the battery management unit-2 is powered on, the logic is consistent with that of the battery management unit 1. Similarly, the address setting of the battery management unit 2 to the battery management unit 5 is completed.
Program flowcharts of the battery cluster management unit and the battery management unit are shown in fig. 3 and fig. 4, respectively. As shown in fig. 3, the work flow of the battery cluster management unit includes the following steps:
s11: it is judged whether or not the number of fixed addresses reaches the set value, and if so, it proceeds to step S12. If not, the process proceeds to step S13.
S12: and (5) normally running.
S13: whether the information sent by the temporary ID is received is judged, if yes, the step is shifted to a step S14, and if not, the step is shifted to a step S13.
S14: and generating a fixed address, wherein the fixed address is added with 1 on the basis of the last address, and the number of the fixed addresses is added with 1.
S15: the fixed address information is sent back to S11.
As shown in fig. 4, the work flow of the battery management unit includes the following steps:
s21: it is judged whether a fixed address is assigned, and if so, the process proceeds to step S22. If not, the process proceeds to step S23.
S22: and (5) normally running.
S23: and reading the UUID number of the user, namely the unique identification code, and generating a temporary ID number according to the unique identification code.
S24: the information is broadcast with a temporary ID number.
S25: and judging whether the information containing the fixed address is received, if so, turning to the step S26, otherwise, returning to the step S24.
S26: the fixed address is stored in the EEPROM, returning to S21.
In summary, the present invention is directed to a battery management system, including a battery cluster management unit and a battery management unit, where the battery cluster management unit collects information of all battery management units in a battery cluster, the battery management unit is configured to manage batteries in a battery box, in the battery cluster, all battery management units are connected in series, a first battery management unit located at a head end of the battery cluster is connected to a power module, the battery management unit sets a fixed address corresponding to the battery management unit through the battery cluster management unit after supplying power, and after the power module supplies power to the battery cluster management unit and the first battery management unit, all battery management units in the battery cluster sequentially set the fixed addresses corresponding to the battery management units according to a sequence of the series connection. The invention also protects a battery management unit address automatic allocation method, firstly the battery management unit inquires the unique identification code of the chip of the battery management unit, generates a temporary ID number according to the unique identification code, and then sends specific broadcast information to the battery cluster management unit; then after receiving the broadcast information, the battery cluster management unit generates a fixed address of the battery management unit and sends the fixed address to the battery management unit corresponding to the temporary ID; and finally, after receiving the fixed address, the battery management unit modifies the ID address of the battery management unit, stores the fixed address in an EEPROM (electrically erasable programmable read-only memory) area, and completes the address setting of the battery management unit. According to the invention, through the hardware platform and the software function, the address of the battery management unit can be automatically allocated, the allocated fixed address is increased progressively according to the power-on sequence of the battery management unit, and the one-to-one correspondence between the fixed address of the battery management unit and the physical installation sequence is realized.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (9)
1. A battery management system comprises a battery cluster management unit and a battery management unit, wherein the battery cluster management unit collects information of all battery management units in one battery cluster, the battery management unit is used for managing batteries in a battery box, all battery management units in the battery cluster are connected in series, a first battery management unit positioned at the head end is connected with a power module, the battery management unit sets a fixed address corresponding to the battery management unit through the battery cluster management unit after power supply, and when the power module supplies power to the battery cluster management unit and the first battery management unit, the fixed addresses of the battery management units in the battery cluster are distributed in an increasing mode according to the power-on sequence of the battery management units.
2. The battery management system according to claim 1, wherein the battery management units are provided with a positive power supply, a negative power supply, a positive relay and a negative relay, the positive relay and the negative relay of the battery management unit are respectively connected with the positive power supply and the negative power supply of the subsequent battery management unit, and the positive power supply and the negative power supply of the first battery management unit are respectively connected with the positive power supply and the negative power supply of the power module.
3. The battery management system of claim 2, wherein the battery management unit sets a corresponding fixed address after supplying power, enters a normal operation mode, and then drives a relay in the battery management unit to act to supply power to a subsequent battery management unit.
4. The battery management system of claim 1, further comprising a system communication management unit in communication with a plurality of the battery cluster management units.
5. A method for automatically assigning addresses of battery management units, for use in a battery management system according to any one of claims 1 to 4, the method comprising
Firstly, a battery management unit inquires a unique identification code of a chip of the battery management unit, generates a temporary ID number according to the unique identification code and then sends specific broadcast information to a battery cluster management unit;
after receiving the broadcast information, the battery cluster management unit generates a fixed address of the battery management unit and sends the fixed address to the battery management unit corresponding to the temporary ID;
and step three, after receiving the fixed address, the battery management unit modifies the ID address of the battery management unit, stores the fixed address in an EEPROM area, and completes the address setting of the battery management unit.
6. The method of claim 5, wherein in step one, the battery management unit determines whether to assign a fixed address, and if so, the battery management unit operates normally; if not, reading the unique identification code of the user, generating a temporary ID number according to the unique identification code, and broadcasting information by using the temporary ID number.
7. The method of claim 5, wherein in step two, the battery cluster management unit determines whether the information sent by the temporary ID is received, and if so, the battery cluster management unit adds 1 to the last address to generate a fixed address, adds 1 to the number of fixed addresses, and then sends the fixed address information.
8. The method as claimed in claim 7, wherein in step two, before determining whether the information sent by the temporary ID is received, the battery cluster management unit determines whether the number of fixed addresses reaches a set value, and if so, the battery cluster management unit operates normally, otherwise, the battery cluster management unit determines whether the information sent by the temporary ID is received.
9. The method of claim 5 wherein in step three, the battery management unit determines whether information containing the fixed address is received, and if so, stores the fixed address in the EEPROM.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115566290A (en) * | 2022-11-24 | 2023-01-03 | 合肥华思系统有限公司 | Automatic battery cluster address allocation system and method for efficient energy storage system |
| CN115580596A (en) * | 2022-11-24 | 2023-01-06 | 合肥华思系统有限公司 | Automatic battery cluster address distribution system and method based on chain connection |
| CN116366600A (en) * | 2023-02-28 | 2023-06-30 | 大秦新能源科技(泰州)有限公司 | Multi-cluster parallel operation address allocation method and system for lithium ion battery module |
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| CN110401732A (en) * | 2019-07-29 | 2019-11-01 | 江西科然科技有限公司 | Battery management system slave addresses distribution method, system, mobile terminal and storage medium |
| CN111131542A (en) * | 2019-12-26 | 2020-05-08 | 上海派能能源科技股份有限公司 | Battery address management method and battery management system |
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| CN116366600A (en) * | 2023-02-28 | 2023-06-30 | 大秦新能源科技(泰州)有限公司 | Multi-cluster parallel operation address allocation method and system for lithium ion battery module |
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