CN112259811A - Simple battery management framework and method - Google Patents
Simple battery management framework and method Download PDFInfo
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- CN112259811A CN112259811A CN202011164817.4A CN202011164817A CN112259811A CN 112259811 A CN112259811 A CN 112259811A CN 202011164817 A CN202011164817 A CN 202011164817A CN 112259811 A CN112259811 A CN 112259811A
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- 238000002955 isolation Methods 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000007726 management method Methods 0.000 description 64
- 238000013461 design Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 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
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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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
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- 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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Abstract
The invention relates to the technical field of battery management, and discloses a simple battery management framework and a method, wherein the battery management framework adopted by the method comprises the following steps: the battery management system comprises a plurality of battery pack levels, a plurality of data acquisition units, a daisy chain type ISOSPI bus and a BMS management unit, wherein the battery pack levels are respectively connected with the daisy chain type ISOSPI bus through the corresponding data acquisition units, and the daisy chain type ISOSPI bus is connected with the BMS management unit to form a plurality of battery pack cascade connection and merging management networks. The invention can lead the battery pack to be quickly merged into the bus connection management network, has simple structure, easy implementation and high reliability, improves the expansibility of the battery management network and can be popularized to more battery applications. Has wide application prospect in various battery applications.
Description
Technical Field
The invention relates to the technical field of battery management, in particular to a simple battery management framework and a method.
Background
At present, electronic technology is rapidly developed, and various electronic products are developed towards a portable, small and light mode, so that more and more electric products are powered by batteries. With the development of battery technology, batteries are more widely applied.
For the battery on the market, a battery data acquisition unit and a battery management unit are all furnished with to every group battery usually, when a plurality of groups battery carried out cascade design, need additionally to increase total battery management unit BMS and come to carry out unified analysis and management to each sub-battery management unit's data, and this management framework is the form of 1 total BMS management unit + N distributed BMS management unit + N data acquisition unit and group battery, and the design is complicated, and the reliability is lower.
Disclosure of Invention
The invention aims to provide a simple battery management framework and a method, thereby simplifying the design of the management framework when a plurality of battery packs are cascaded.
In order to realize the design, the invention adopts the following technical scheme:
a simple battery management architecture comprising: the battery management system comprises a plurality of battery pack levels, a plurality of data acquisition units, a daisy chain type ISOSPI bus and a BMS management unit, wherein the battery pack levels are respectively connected with the daisy chain type ISOSPI bus through the corresponding data acquisition units, and the daisy chain type ISOSPI bus is connected with the BMS management unit to form a plurality of battery pack cascade connection and merging management networks.
A simple battery management framework, the BMS management unit is formed by electrically connecting an MCU chip with an isolation transformer through an SPI-ISOSPI chip.
A simple battery management framework is provided, wherein each data acquisition unit is formed by electrically connecting an isolation transformer with an acquisition chip through an SPI-ISOSPI chip and a four-wire SPI.
A simple battery management framework working method comprises the following steps:
1) the data acquisition unit 1 is merged into a management bus, and an acquisition chip performs analog-to-digital conversion on the voltage and charge-discharge current information of each battery in the battery pack;
2) data are transmitted in a four-wire SPI communication mode, and a battery acquisition chip is in a four-wire SPI mode;
3) converting the four-wire SPI into a two-wire SPI by using an SPI-ISOSPI chip;
4) isolating data by using an isolation transformer, and connecting two line homonymous ends of secondary levels of the isolation transformers from the data acquisition unit 1 to the data acquisition unit N in parallel in a daisy chain type bus mode to form a data monitoring network;
5) the BMS management unit is merged into a daisy chain type ISOSPI bus through ISOSPI, collects and processes information of each subdata acquisition unit;
6) realize 1 BMS administrative unit + N group battery and data acquisition unit's battery management framework.
A simple battery management framework working method is characterized in that a data acquisition unit is in a sub-data acquisition unit information identification mode, sub-data acquisition units are merged into a bus one by one, a BMS management unit and the sub-data units perform handshaking and allocate addresses, a low-order address is allocated first when the sub-data acquisition units are merged into the bus, and the data acquisition units feed back address setting success information after the allocation is successful; the subsequent merging unit sequentially increases the address; or the upper computer controls the BMS management unit to manually allocate addresses according to the accessed sequential signals; the specific implementation flow is as follows:
receiving a handshaking signal of the BMS management unit, judging whether an address is allocated or not, judging Y, returning allocated address information, and sending the allocated address information to the BMS management unit; judging N, and distributing from the distribution N; judging whether the distribution is successful or not, judging N, and continuing to distribute N; judging Y, returning the allocated address information, and sending the allocated address information to the BMS management unit;
after the address allocation is finished, the BMS management unit distinguishes the data source through the address bit, and therefore the identification of different subdata collection unit information is achieved.
Due to the adoption of the technical scheme, the invention has the following advantages:
a simple battery management frame and method, the data acquisition unit is used to make A/D conversion for the voltage of each battery in the battery pack and the charging/discharging current information of the battery pack, and at the same time, the data is merged into the bus in ISOSPI communication mode. The battery management framework of 1 BMS management unit + N battery packs and data acquisition units can be realized.
The present invention enables the battery pack to be quickly incorporated into the bus, and all the battery pack data is uniformly processed by one BMS management unit. The structure is simple, easy to implement, reliability and high efficiency are realized by connecting the battery pack in parallel into the management network, the expansibility of the battery management network is improved, meanwhile, through automatic address allocation and identification, the data communication design is simplified, the communication reliability is improved, and the battery management system has wide application prospects in the application of various batteries. The high expansibility of the fine carbon can be popularized to more battery applications.
Drawings
Fig. 1 is a schematic diagram of a simple battery management architecture of the present invention.
Fig. 2 is a diagram of a simple battery management architecture design application.
Fig. 3 is a simple address allocation diagram of a sub-data acquisition unit of a battery management architecture.
Detailed Description
The patent is further explained below with reference to the drawings. The scope of protection of the patent is not limited to the specific embodiments.
As shown in fig. 1, 2 and 3, a simple battery management architecture includes: the battery management system comprises a plurality of battery pack levels, a plurality of data acquisition units, a daisy chain type ISOSPI bus and a BMS management unit, wherein the battery pack levels are respectively connected with the daisy chain type ISOSPI bus through the corresponding data acquisition units, and the daisy chain type ISOSPI bus is connected with the BMS management unit to form a plurality of battery pack cascade connection and merging management networks.
And the BMS management unit is formed by electrically connecting an MCU chip with an isolation transformer through an SPI-ISOSPI chip. Each data acquisition unit is formed by electrically connecting an isolation transformer with an acquisition chip through an SPI-ISOSPI chip and a four-wire SPI.
The battery management architecture includes: the battery management system comprises a plurality of battery pack levels, a plurality of data acquisition units, a daisy chain type ISOSPI bus and a BMS management unit, wherein the battery pack levels are respectively connected with the daisy chain type ISOSPI bus through the corresponding data acquisition units, and the daisy chain type ISOSPI bus is connected with the BMS management unit to form a plurality of battery pack cascade connection and merging management networks.
And the BMS management unit is formed by electrically connecting an MCU chip with an isolation transformer through an SPI-ISOSPI chip. Each data acquisition unit is formed by electrically connecting an isolation transformer with an acquisition chip through an SPI-ISOSPI chip and a four-wire SPI.
The adopted data acquisition unit is responsible for carrying out analog-to-digital conversion on the voltage of each battery in the battery pack and the charging and discharging current information of the battery pack, and simultaneously, data is merged into a bus in an ISOSPI communication mode. The BMS management unit is responsible for uniformly managing and calculating the data of each battery pack so as to obtain the data of the whole battery pack. When the battery pack needs to be additionally added, the data management of the battery pack can be realized only by merging the battery pack matched data acquisition unit into the ISOSPI bus, and meanwhile, the ISOSPI bus has the isolation characteristic, so that the battery packs can be randomly combined in series and parallel without considering the level matching problem of the bus. Therefore, the battery management framework of 1 BMS management unit + N battery packs and a data acquisition unit can be realized.
Example 1
In fig. 2, taking the data acquisition unit 1 capable of managing a bus as an example, the acquisition chip performs analog-to-digital conversion on voltage and charge-discharge current information of each battery in the battery pack and transmits data in a four-wire SPI communication form, and most of the special battery acquisition chips commonly used in the market are in a four-wire SPI form; converting the four-wire SPI into a two-wire SPI by using an SPI-ISOSPI chip, and isolating data by using an isolation transformer; connecting the secondary terminals of the isolation transformers such as two-wire homonymous terminals of the data acquisition units 1 to N in parallel in a daisy chain type bus mode so as to form a data monitoring network; the BMS management unit is merged into a daisy chain type ISOSPI bus through ISOSPI, collects information of each subdata acquisition unit and processes the information. Therefore, the battery management framework of 1 BMS management unit + N battery packs and a data acquisition unit is realized.
The key of the framework design is the information identification of the subdata acquisition unit, and the specific implementation mode is as follows: the sub-data acquisition units are merged into the bus one by one, the BMS management unit and the sub-data units perform handshaking and address allocation, the sub-data acquisition units are merged into the bus firstly and allocate low-order addresses firstly, and the data acquisition units feed back address setting success information after allocation is successful. Subsequent merge units increment addresses in sequence. The upper computer can also be used for controlling the BMS management unit to manually allocate addresses according to the accessed sequential messages. After the address allocation is finished, the BMS management unit distinguishes the data source through the address bit, and therefore the identification of different subdata collection unit information is achieved.
As can be seen from the examples, the method can simply and efficiently connect the battery pack in parallel into the management network, so that the expansibility of the battery management network is improved, meanwhile, the data communication design is simplified through automatic address allocation and identification, and the reliability of communication is improved.
The framework has the advantages of ingenious design, simple and convenient structure, high circuit reliability and expandability and wide application prospect in the application of various batteries.
Claims (5)
1. A simple battery management architecture characterized by: the method comprises the following steps: the battery management system comprises a plurality of battery pack levels, a plurality of data acquisition units, a daisy chain type ISOSPI bus and a BMS management unit, wherein the battery pack levels are respectively connected with the daisy chain type ISOSPI bus through the corresponding data acquisition units, and the daisy chain type ISOSPI bus is connected with the BMS management unit to form a plurality of battery pack cascade connection and merging management networks.
2. A simple battery management architecture as claimed in claim 1, wherein: and the BMS management unit is formed by electrically connecting an MCU chip with an isolation transformer through an SPI-ISOSPI chip.
3. A simple battery management architecture as claimed in claim 1, wherein: each data acquisition unit is formed by electrically connecting an isolation transformer with an acquisition chip through an SPI-ISOSPI chip and a four-wire SPI.
4. A simple method of operating a battery management architecture as claimed in claim 1, wherein: the method comprises the following steps:
1) the data acquisition unit 1 is merged into a management bus, and an acquisition chip performs analog-to-digital conversion on the voltage and charge-discharge current information of each battery in the battery pack;
2) data are transmitted in a four-wire SPI communication mode, and a battery acquisition chip is in a four-wire SPI mode;
3) converting the four-wire SPI into a two-wire SPI by using an SPI-ISOSPI chip;
4) isolating data by using an isolation transformer, and connecting two line homonymous ends of secondary levels of the isolation transformers from the data acquisition unit 1 to the data acquisition unit N in parallel in a daisy chain type bus mode to form a data monitoring network;
5) the BMS management unit is merged into a daisy chain type ISOSPI bus through ISOSPI, collects and processes information of each subdata acquisition unit;
6) realize 1 BMS administrative unit + N group battery and data acquisition unit's battery management framework.
5. The method of claim 4, wherein the battery management framework is a simple battery management framework comprising: the data acquisition unit is in a sub-data acquisition unit information identification mode, the sub-data acquisition units are merged into a bus one by one, a BMS management unit and the sub-data units perform handshaking and address allocation, a low-order address is allocated firstly when the sub-data acquisition units are merged into the bus, and the data acquisition units feed back address setting success information after the allocation is successful; the subsequent merging unit sequentially increases the address; or the upper computer controls the BMS management unit to manually allocate addresses according to the accessed sequential signals; the specific implementation flow is as follows:
receiving a handshaking signal of the BMS management unit, judging whether an address is allocated or not, judging Y, returning allocated address information, and sending the allocated address information to the BMS management unit; judging N, and distributing from the distribution N; judging whether the distribution is successful or not, judging N, and continuing to distribute N; judging Y, returning the allocated address information, and sending the allocated address information to the BMS management unit;
after the address allocation is finished, the BMS management unit distinguishes the data source through the address bit, and therefore the identification of different subdata collection unit information is achieved.
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| CN202011164817.4A CN112259811A (en) | 2020-10-27 | 2020-10-27 | Simple battery management framework and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113009902A (en) * | 2021-02-22 | 2021-06-22 | 福建星云电子股份有限公司 | isoSPI communication system with access diagnosis function and use method |
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- 2020-10-27 CN CN202011164817.4A patent/CN112259811A/en active Pending
Patent Citations (6)
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| US20160226107A1 (en) * | 2014-08-26 | 2016-08-04 | Elite Power Innovations, Llc | Method and system for battery management |
| CN207028864U (en) * | 2017-07-21 | 2018-02-23 | 山东大学 | Distributed double-core battery management system based on isolated communication bus |
| DE102017218560A1 (en) * | 2017-10-18 | 2019-04-18 | Robert Bosch Gmbh | Battery unit for a battery system and battery system |
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