CN109103523A - Minisize distributed type Intelligent battery management system - Google Patents
Minisize distributed type Intelligent battery management system Download PDFInfo
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- CN109103523A CN109103523A CN201810985179.9A CN201810985179A CN109103523A CN 109103523 A CN109103523 A CN 109103523A CN 201810985179 A CN201810985179 A CN 201810985179A CN 109103523 A CN109103523 A CN 109103523A
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- voltage
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- 238000001514 detection method Methods 0.000 claims abstract description 45
- 229910001416 lithium ion Inorganic materials 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims description 21
- 239000002245 particle Substances 0.000 claims description 7
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 4
- 238000012804 iterative process Methods 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 abstract description 11
- 239000000178 monomer Substances 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 8
- 230000005611 electricity Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
-
- 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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/0071—Regulation of charging or discharging current or voltage with a programmable schedule
-
- H02J7/0091—
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Secondary Cells (AREA)
Abstract
The present invention relates to minisize distributed type Intelligent battery management systems, belong to new energy measurement and control area；The system is detected with Li-ion batteries piles status information and is managed as target, on-line checking, remaining capacity SOC (State of charge) estimation, balanced management are carried out to cell voltage, electric current, temperature, it realizes to battery pack real-time monitoring, ensures the safety used under the various complex working conditions of battery pack；It is miniaturized, Distributed Design；System is divided into two parts, and detection plate carries out status information detection to battery pack, has 12 voltage detecting channels, a current detecting channel, five temperature detection channels, 12 passive equalization channels；It can be cascaded by daisy chained between detection plate, the sense channel of extension system, increase versatility；Master control borad handles battery state information, display, over-voltage, overcurrent, overtemperature alarm function；System monomer voltage precision 2.00mV, current precision 0.1mA, temperature accuracy ± 1.00 DEG C, SOC estimation on line precision 3.00%.
Description
Technical field
This application involves new energy measurement and control area more particularly to a kind of signal acquisition circuits and battery management system.
Background technique
In the whole life cycle of Li-ion batteries piles, battery management system (Battery Management
System, BMS) effect and safety that battery pack exports will affect to the monitoring and regulation of state parameter；Therefore, real-time monitoring
The variation of state parameter, and ensure that the working performance of Li-ion batteries piles is very important based on this；Due in BMS in groups
The estimating techniques of state parameter detection and remaining capacity (State of charge, SOC) are still immature, exist in use process
Security risk seriously constrain the development of Li-ion batteries piles；For Li-ion batteries piles, SOC characterizes lithium-ion electric
The residual capacity of pond group, reliable BMS rely on accurate SOC value；It, not only can to battery pack progress in the situation known to the value
By energy management and security control, but also the premature deterioration of Li-ion batteries piles is avoided, prolonged its service life；And SOC is smart
Exactness depends on the accuracy of Li-ion batteries piles state parameter；Therefore, battery state parameter is accurately acquired, to raising SOC
The precision of estimation and the working performance and its energy of guarantee Li-ion batteries piles and safety management are most important；In addition, lithium from
The charge and discharge process of sub- battery pack includes links, overcharge and the over-discharge electrical phenomenas such as complicated electric energy, chemical energy and thermal energy conversion
Easily cause safety accident, accurate SOC estimation plays an important role in preventing overcharge and overdischarge；In Li-ion batteries piles
In, safety is still the problem of paying close attention to the most, and SOC estimation is basis and the premise of its safe handling；Lithium-ion electric
Pond group uses battery cell cascade structure, and due to not can avoid the difference of material and technique, inconsistent phenomenon is objective between monomer is deposited
And not can avoid；Also, the phenomenon can be more and more obvious with the increase of cycle-index, this allows for inconsistency between monomer
Expression become the important component of SOC estimation in groups with amendment, while also accurately estimate to SOC in groups bring it is huge
Challenge.
Summary of the invention
The purpose of the present invention carries out real-time monitoring to Li-ion batteries piles, and can accurately estimate SOC；It designs a kind of micro-
Type distributed intelligence battery management system；Guarantee that SOC is maintained in reasonable range, to prevent due to overcharging or overdischarging pair
The damage of battery, so that prediction battery pack there remains the state-of-charge of how many energy or battery pack at any time.
It present invention is mainly used for management Li-ion batteries piles, realizes to battery pack real-time monitoring, ensures that battery pack is various multiple
Safety in utilization under general labourer's condition；It is miniaturized, Distributed Design, whole system is divided into two parts, detection plate is to battery pack
Carry out status information detection；Detection plate has 12 voltage detecting channels, a current detecting channel, five temperature detections logical
Road, 12 passive equalization channels；It can be cascaded by daisy chained between detection plate, the sense channel of extension system；It is logical
The end voltage and temperature, charging and discharging currents and assembled battery total voltage for crossing every piece of battery in real-time monitoring battery pack, prevent battery from sending out
Life overcharges or over-discharge electrical phenomena；Battery condition can be provided in time simultaneously, picks out problematic battery, keep whole group battery
Reliability of operation and high efficiency, make remaining capacity estimation model is implemented as possibility；This system also has equalization function, adopts
It is passive equilibrium；Each battery in battery pack is set all to reach balanced consistent state；Ensure Li-ion batteries piles various
The safety run under complex working condition.
Detailed description of the invention
Fig. 1 is the structural block diagram of the signal acquisition circuit of one embodiment；
Fig. 2 is the structural block diagram of the signal acquisition circuit of another embodiment；
Fig. 3 is the circuit diagram of the voltage detection unit of one embodiment；
Fig. 4 is the structural block diagram of the temperature collection circuit of one embodiment；
Fig. 5 is the structural block diagram of the current detecting unit of one embodiment；
Fig. 6 is Li-ion batteries piles SOC appraising model structural schematic diagram；
Fig. 7 is the PCB of one embodiment master control borad；
Fig. 8 is the PCB of one embodiment detection plate；
Fig. 9 is the pictorial diagram of one embodiment.
Specific embodiment
In order to which the objects, technical solutions and advantages of the application are more clearly understood, accompanying drawings and embodiments are once combined, it is right
The application is further described；It should be appreciated that specific embodiment described herein only explains the application, it is not used to limit
The application.
In one embodiment, as shown in Figure 1, providing a kind of voltage signal acquisition circuit；Voltage signal acquisition electricity
Road include detection plate, master control borad and for connecting each single battery in battery pack 12 connecting pins (IN1 to IN12),
In, detection plate unit has transmission control terminal, signal output end and 12 voltage acquisition ends；The transmission control terminal of detection plate connects
The transmission controlled end for connecing master board detects the signal input part of the signal output end connection master board of plate unit；When for
For the battery pack of any joint number, when the monomer included by the battery pack is less than or equal to 12 section, Fig. 1 voltage signal acquisition circuit
It can be used for monitoring the voltage parameter of the battery pack；When being greater than 12 section, the connection type of Fig. 2 can be used, detection plate is carried out
Cascade；Each detection plate has an iosSPI interface, for realizing high speed, the local communication of anti-RF interference；By multiple detections
Plate uses daisy chained connection, and all devices use a primary processor wiring；It can be to greater than 12 section single batteries
Battery pack is monitored the voltage parameter of the battery pack.
In the present embodiment, front-end detection plate unit can be used for acquiring the voltage of each single battery in battery pack, and will adopt
Each monomer voltage collected is transmitted to main control unit；In practical applications, 12 battery terminal connections in signal acquisition circuit
On the one hand each single battery in connection battery pack, on the other hand acquires with 12 monomer voltages in front-end detection plate unit
End connects one to one；Specifically, after front-end detection plate unit collects the voltage of each single battery, transmission control terminal can be passed through
Transmission trigger signal is sent to the transmission controlled end of main control unit, carries out phase between front end monitoring unit and main control unit to trigger
The transmission for answering electric signal passes through the electrical signal of front-end detection plate unit and master control such as the transmission of battery voltage signal
The voltage of collected each single battery is transmitted to main control unit from front end detection plate unit by the electric signal input end of unit.
Wherein, in Fig. 1 between front-end detection plate unit and main control unit can by SPI carry out signal transmission, i.e., before
The signal output end of end detection plate unit and the signal input part of main control unit may each comprise clock pins and data pin；Separately
Outside, multiple detection plate units in Fig. 2 pass through the chip of a LTC6820 by daisy chained connection and main control unit carries out
IosSPI communication.
Above-mentioned signal acquisition circuit, including front-end detection plate unit, master control plate unit and for connecting in battery pack
The connecting pin of each single battery, the signal input part of the signal output end connection main control unit of front-end detection plate unit；Due to can
With the cascade of multiple detection plates, the application can be suitable for the battery pack of different battery cell numbers, improve versatility.
In order to further to the application voltage acquisition scheme and passive equalization scheme be described in detail, in conjunction with figure
3 are illustrated；Batteries monomer voltage acquisition is acquired using LTC6804 chip in the present embodiment；The chip has ten
Two voltage acquisition channels carry out voltage acquisition；And there are band 12 equalization channels to carry out equilibrium treatment to battery；Work as electricity
When there is certain economize on electricity cell voltage higher than other batteries in the voltage value of pressure acquisition channel acquisition back, just from equalization channel output one
For a switching signal to metal-oxide-semiconductor, opening metal-oxide-semiconductor falls the energy of high-voltage battery on power resistor with thermal energy consumption；Work as detection
Just metal-oxide-semiconductor is closed when identical with other cell voltages to high-voltage battery, stops consumption energy.
In one embodiment, as shown in figure 4, signal acquisition circuit further includes the detection list for detecting battery pack temperature
Member；For monitoring the variation of battery pack temperature in use process, charge and discharge process, influence battery too high or too low for temperature is prevented
The working performance of group；Temperature sensing circuit uses thermistor monitoring temperature；With the resistance value of the variation thermistor of temperature
It can change, and then the voltage at thermistor both ends can also change in temperature sensing circuit；The voltage of variation is passed through
The signal output end of detection plate passes to the signal input part of master control borad；The processor of master control plate unit will be received from detection plate
Voltage value converted by AD and by voltage convert actual temperature, to obtain battery pack temperature；Detecting plate unit has five
Temperature acquisition mouth carries out temperature acquisition to battery pack, can be increased and decreased according to the actual situation to temperature acquisition mouth.
In one embodiment, signal acquisition circuit further includes current detecting unit；It was being used for monitoring battery pack
The variation of electric current in journey, charge and discharge process prevents the excessive working performance for influencing battery pack of electric current, and provides for SOC estimation
Current parameters；As shown in figure 5, current acquisition module uses chip I NA219, pass through sampling of connecting in major loop
Resistance Rs obtains the current parameters in electric current according to Ohm's law I=U/Rs using the voltage at the AD conversion acquisition both ends Rs；Electricity
It flows parameter and master control plate unit is passed to by the communication pattern of IIC；That is the signal output end of front-end detection plate unit and master control list
The signal input part of member may each comprise clock pins and data pin；Detecting plate unit has a current detecting mouth.
In one embodiment, master control plate unit is collected into after the parameter of voltage, electric current just to parameter processing, carries out SOC
Estimation；As shown in fig. 6, for the model structure schematic diagram of Li-ion batteries piles SOC estimation；The SOC estimation being used in the present invention
Method is based on the SOC estimation method for simplifying particle Unscented transform；This method is with the accurate estimation mesh of Li-ion batteries piles SOC value
Mark proposes one kind based on particle Unscented transform method is simplified, by simplifying three particles and dual Sigmaization treatment process, is somebody's turn to do
Method improves the iterative calculation based on Unscented kalman on the basis of fully considering that lithium ion battery works in groups
The thought for simplifying particle Unscented transform is applied particularly to prediction link and modifies link by journey, realizes that Li-ion batteries piles SOC estimates
It calculates the foundation of model and the mathematical iterations operation of SOC value and finally obtains accurate SOC value；
In the present invention, as shown in fig. 7, the PCB schematic diagram of the master control borad for the embodiment of the present invention；As shown in figure 8, for the present invention
The PCB schematic diagram of the detection plate of embodiment；As shown in figure 9, being the schematic diagram in kind of the embodiment of the present invention；The material object schematic diagram is real
Existing is the accurate estimation that voltage, electric current, the on-line checking of temperature and SOC are carried out to the battery pack of 6 section single batteries composition.
Claims (5)
1. a kind of minisize distributed type Intelligent battery management system, which is characterized in that including front-end detection plate unit and master control borad list
Member；The signal input part of the master control plate unit is connect with the signal output end of front-end detection plate unit；Master control plate unit includes
It is a kind of based on the online Accurate Estimation Method of remaining capacity (State of charge, SOC) for simplifying particle Unscented transform, display
Module, overcurrent, over-voltage, overtemperature alarm function；Detecting plate unit includes 12 channel voltage detectings, Five-channel temperature detection, one
Channel current detection.
2. voltage collection circuit as described in claim 1, which is characterized in that single detection plate is examined with 12 channel voltages
It surveys；Voltage-tracing precision 2.00mV, and voltage parameter is passed into master control borad and carries out SOC estimation；And it can be with shape between detection plate
It at cascade mode, can detecte multiple groups Li-ion batteries piles when in the tandem mode, increase the versatility of system.
3. temperature collection circuit as described in claim 1, which is characterized in that single detection plate has Five-channel temperature detection；
Temperature tracking accuracy ± 1 DEG C；For detecting Li-ion batteries piles use process, in charge and discharge process temperature variation, prevent out
Existing influence of the excess temperature to Li-ion batteries piles working performance.
4. current collection circuit as described in claim 1, which is characterized in that single detection plate is detected with a channel current；
Current detection circuit is connected in major loop, current tracking precision 0.1mA, for detecting in use process, charge and discharge process
The variation of middle electric current prevents influence of the overcurrent to Li-ion batteries piles working performance；And current parameters are passed into master control
Plate carries out SOC estimation.
5. as described in claim 1 a kind of based on the SOC estimation method for simplifying particle Unscented transform, which is characterized in that the party
Method is fully considering that lithium ion battery in groups on working foundation, improves the iterative process based on Unscented kalman, will
It simplifies particle Unscented transform thought to be applied particularly to predict and modify link, realizes building for Li-ion batteries piles SOC appraising model
Vertical and SOC value mathematical iterations operation, realizes SOC estimation on line precision 3.00%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810985179.9A CN109103523A (en) | 2018-10-09 | 2018-10-09 | Minisize distributed type Intelligent battery management system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810985179.9A CN109103523A (en) | 2018-10-09 | 2018-10-09 | Minisize distributed type Intelligent battery management system |
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| CN109103523A true CN109103523A (en) | 2018-12-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110749830A (en) * | 2019-11-22 | 2020-02-04 | 淮南市矿用电子技术研究所 | Mining lithium battery pack management system acquisition unit and acquisition method thereof |
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2018
- 2018-10-09 CN CN201810985179.9A patent/CN109103523A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110749830A (en) * | 2019-11-22 | 2020-02-04 | 淮南市矿用电子技术研究所 | Mining lithium battery pack management system acquisition unit and acquisition method thereof |
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Application publication date: 20181228 |