CN107800172A - A kind of data collecting system of batteries of electric automobile module - Google Patents
A kind of data collecting system of batteries of electric automobile module Download PDFInfo
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- CN107800172A CN107800172A CN201711155384.4A CN201711155384A CN107800172A CN 107800172 A CN107800172 A CN 107800172A CN 201711155384 A CN201711155384 A CN 201711155384A CN 107800172 A CN107800172 A CN 107800172A
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- 239000000178 monomer Substances 0.000 claims abstract description 53
- 238000007599 discharging Methods 0.000 claims abstract description 10
- 238000004891 communication Methods 0.000 claims abstract description 9
- 239000000523 sample Substances 0.000 claims abstract description 5
- 238000012545 processing Methods 0.000 claims abstract description 4
- 230000003750 conditioning effect Effects 0.000 claims description 6
- 238000013461 design Methods 0.000 description 13
- 230000005611 electricity Effects 0.000 description 11
- 238000005259 measurement Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000005070 sampling Methods 0.000 description 5
- 239000011324 bead Substances 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000686 essence Substances 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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- 238000011217 control strategy Methods 0.000 description 1
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- 241000894007 species Species 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- H02J7/0022—
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
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- H02J7/0026—
Abstract
A kind of data collecting system of batteries of electric automobile module, belongs to technical field of battery management.Power module is respectively current acquisition module, temperature collect module and the power supply of MCU operation control modules；Monomer voltage acquisition module connecting electric automobile battery modules, powered by batteries of electric automobile module and gather the monomer voltage data of batteries of electric automobile module；Current acquisition module is used for the charging and discharging currents data for gathering batteries of electric automobile module；The temp probe of temperature collect module is uniformly arranged in battery module of electric vehicle, gathers the temperature data of battery module of electric vehicle；MCU operation control modules are used to carry out monomer voltage acquisition module, current acquisition module and temperature collect module Control on Communication and receive monomer voltage data, charging and discharging currents data and the temperature data with the batteries of electric automobile module of processing collection.The present invention come configuration data acquisition system, meets to enhance versatility while precision index according to the actual scale of power battery module.
Description
Technical field
The present invention relates to technical field of battery management, and in particular to a kind of data acquisition system of batteries of electric automobile module
System.
Background technology
Battery management system (batter management system, BMS) is the indispensable important set of electric automobile
Into part.BMS key effect has at 2 points：When it is accurate, estimate in real time battery state of charge (state of charge,
SOC)；Another is to carry out Balance route to battery pack.It is nominally electric that SOC is defined as remaining electric charge surplus and battery in battery
The ratio of lotus capacity.Accurately, real-time SOC estimation can not only determine battery pack dump energy number, it is hereby achieved that
More accurate electric automobile course continuation mileage, improves the capacity usage ratio of battery pack, and can monitor the operation of power battery pack
State, so as to prevent its super-charge super-discharge, strengthen the security of power battery pack.Balance route mainly solves each list in battery pack
The problem of inconsistency that objective reality between body battery.Balance route management helps to lift the whole volume of battery pack, has
Help control the depth of discharge of battery pack, be favorably improved the security of electrokinetic cell and extend battery life.Battery mould
Monomer voltage data, the temperature data of battery modules, the current data of battery modules of group are the straight of SOC estimations and Balance route
Connect foundation.The accuracy and stability of the data collecting system of batteries of electric automobile module largely determine SOC estimation essences
The quality of degree and Balance route.
Power battery pack SOC estimation method has had many kinds, and it is open circuit electricity to generally believe a kind of preferable scheme at present
The combined use of platen press and current integration method, this scheme is to hardware circuit and MCU (Micro Controller Unit, monolithic
Machine) operational capability require low, the essence of voltage acquisition, current acquisition and temperature acquisition data but estimation precision places one's entire reliance upon
Degree, therefore the precision of batteries of electric automobile module data acquisition determines the precision of SOC estimations.In addition, the criterion of Balance route
It is the value of voltage of serially-connected cells and SOC value, the quality of its control strategy is similarly dependent on the acquisition precision of battery modules data.
Current monomer voltage acquisition scheme mainly has two kinds.A kind of scheme is to build monomer voltage using discrete component to adopt
Collect module, each monomer analog voltage is mainly sent to by multiplexer or light-coupled isolation switch by AD collection electricity in turn
Road, then change into data signal and deliver to MCU.This scheme cost is relatively low, but required component species number is more, circuit
Design debugging is complicated, and later period maintenance is complicated, while sampling precision is low, sampling period length, poor anti jamming capability.Another scheme is
Using integrated chip IC, according to the suitable matched IC of the scale selection of battery modules.This scheme acquisition precision is high, resists
Interference performance is strong, but the battery modules of different scales will select the chip of different series, poor universality.
Temperature data acquisition mainstream scheme uses NTC (Negatibe Temperature Coefficient) temperature-sensitive at present
Resistance is as temperature sensor.NTC has negative temperature coefficient, its resistance linear change with temperature, has applied widely, survey
The features such as accuracy of measurement is high.But because itself resistance varies with temperature and changes, output is analog quantity, it is necessary to coordinate AD conversion
Device use can be converted to data signal and receive and handle for MCU.In addition, if need to measure in same system multiple
Temperature spot has two methods, first, an AD conversion passage is used alone in each temperature spot, individually takes a MCU I/O port,
The shortcomings that this method is that occupancy MCU resource is more；Second, add path multiplexer before a/d converter, timesharing is by different temperature points
Analog signalses in turn switch on to a/d converter, this method shortcoming is circuit structure complexity, and the probability that is out of order is larger.
The data collecting system of most batteries of electric automobile modules designs both for specific battery modules on the market,
The data collecting system of different manufacturers can be only applied to respective designed power battery module, and versatility is not strong.Work as design
Go out new power battery module, data collecting system needs also exist for redesigning, construction cycle length.Other later period maintenance and replacing
Have to look for genuine man, it is very inconvenient.So designing a kind of sampling precision height, strong antijamming capability, different scales shape can be directed to
The data collecting system of the power battery module flexible configuration of formula is a major challenge.
The content of the invention
In order to solve the above problems, the present invention provides a kind of data collecting system of batteries of electric automobile module, can basis
The actual scale of power battery module carrys out configuration data acquisition system, meets to enhance versatility while precision index.
The technical scheme is that：
A kind of data collecting system of batteries of electric automobile module, including power module, monomer voltage acquisition module, electric current
Acquisition module, temperature collect module and MCU operation control modules,
The power module is respectively the current acquisition module, temperature collect module and the power supply of MCU operation control modules；
The monomer voltage acquisition module connects the batteries of electric automobile module, is supplied by the batteries of electric automobile module
Electricity simultaneously gathers the monomer voltage data of the batteries of electric automobile module；
The current acquisition module is used for the charging and discharging currents data for gathering the batteries of electric automobile module；
The temp probe of the temperature collect module is uniformly arranged in the battery module of electric vehicle, gathers the electricity
The temperature data of electrical automobile battery module；
The MCU operation control modules connect monomer voltage acquisition module, current acquisition module and the temperature acquisition mould
Block, Control on Communication is carried out to the monomer voltage acquisition module, current acquisition module and temperature collect module and receives and handles
Monomer voltage data, charging and discharging currents data and the temperature data of the batteries of electric automobile module of the collection；
The monomer voltage acquisition module includes n collection plate, 1≤n≤16；I-th piece of collection plate gathers miBattery pack string
Monomer voltage, 1≤i≤n, 6≤mi≤12；It is described all to be composed in parallel per Battery pack string by k cell, k >=1；Then institute
The number M for stating the cell of monomer voltage acquisition module management is：
The n collection plate manages M cell by way of parallel addressing；
The temperature collect module includes controller and the more single data buses being connected with the controller, and the data are total
Multiple temperature sensors are mounted on line.
Specifically, the power module includes regulator and linear voltage regulator, the input of the power module
End connects vehicle-mounted 12V DC power supply, and 5V voltages are exported after the regulator and are supplied for the current acquisition module
Electricity, it is the temperature collect module and MCU operation controls that the 5V voltages export 3.3V voltages after the linear voltage regulator
Module for power supply, the model LM2596 of the switching regulaor, the model AMS1117-3.3 of the linear voltage regulator.
Specifically, the MCU operation control modules use STM32F103 series monolithics as microcontroller, it is described
STM32F103 series monolithics include SPI interface, USART interfaces, I/O interface and CAN interface, and the SPI interface passes through
LTC6820 chips are converted into isoSPI twisted-pair feeders and communicated with the voltage acquisition module, described in the USART interfaces connection
Temperature collect module is communicated, and the I/O interface connects the current acquisition module and communicated, and the CAN interface is as institute
State the total data interface of data collecting system.
Specifically, the current acquisition module includes Hall current sensor and signal conditioning circuit, the Hall current
Sensor gathers the charging and discharging currents of the batteries of electric automobile module and transported after the signal conditioning circuit with the MCU
Calculate the voltage matches of control module I/O interface.
Specifically, the collection plate uses battery pack monitor LTC6811-2.
Specifically, every piece of collection plate by isoSPI twisted pair line connections to isoSPI buses, and by SPI interface with
The MCU operation control modules are communicated.
Specifically, the model STM32F103C8T6 of the controller, the model DS18B20 of the temperature sensor.
Beneficial effects of the present invention are：Modules independent parallel work in the present invention, occupancy MCU resources are few, improve
MCU calculation process efficiency, it is independent of each other between modules, scalability and maintainability are relatively good；Monomer voltage gathers
Module uses the voltage acquisition chip of Highgrade integration, and accuracy of data acquisition is higher compared with discrete component, and the sampling period is shorter,
Anti- external disturbance ability is stronger；And monomer voltage acquisition module is directly connected with batteries of electric automobile module, itself is also by institute
The battery modules power supply of detection, can avoid the high-voltage large current of power battery pack side from directly affecting control section；Monomer
Voltage acquisition module includes multiple collection plates, and each collection plate can gather multigroup battery strings, can multiple lists in parallel per Battery pack string
Body battery, and can be stacked between multiple collection plates by parallel addressing approach so that monomer voltage acquisition module can be unified
Manage section cells up to a hundred；The data/address bus of unibus structure is used in temperature collect module, can be according to power battery pack
The temperature points of collection needed for actual scaleable configuration, it is communicated by serial ports with MCU operation control modules, saves MCU's
Resource, improve the integral operation disposal ability of system；MCU operation control modules to the monomer voltage data received by carrying out
Processing, it can be deduced that the total voltage of battery modules, it is not necessary to separately add battery modules total voltage acquisition module, simplify system, save
Cost.
Brief description of the drawings
Fig. 1 is a kind of overall structure diagram of the data collecting system of batteries of electric automobile module proposed by the present invention.
Fig. 2 is a kind of design circuit of power module in embodiment.
Fig. 3 is a kind of design circuit of monomer voltage acquisition module in embodiment.
Fig. 4 is that the monomer voltage in a kind of data collecting system of batteries of electric automobile module proposed by the present invention gathers mould
The collection plate of block stacks schematic diagram.
Fig. 5 is the temperature collect module in a kind of data collecting system of batteries of electric automobile module proposed by the present invention
Connection diagram.
Embodiment
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Show as shown in Figure 1 for a kind of overall structure of the data collecting system of batteries of electric automobile module proposed by the present invention
It is intended to, including power module, monomer voltage acquisition module, temperature collect module, current acquisition module, MCU operation control modules.
Power module is the module for power supply in system by DC-DC voltage regulation ways.Monomer voltage acquisition module in battery modules with owning
Battery cell is joined directly together, for gathering monomer voltage data in real time.The temp probe of temperature collect module is uniformly placed in electricity
In the module of pond, for gathering the temperature data in battery modules.Current acquisition module is connected on the discharge and recharge inside battery modules
In loop, the charging and discharging currents data of battery modules are gathered.Microcontroller of the MCU operation control modules as the system, to it
He carries out Control on Communication at module, completes the reception and processing of data.The data collecting system of this electric automobile power battery group is high
Modularization is spent, the work of modules independent parallel, occupancy MCU resources are few, improve MCU calculation process efficiency, modules
Between be independent of each other, scalability and maintainability are relatively good.
Power module design：
The monomer voltage acquisition module of data acquisition system is directly connected with high voltage power battery pack, therefore can direct power taking
In the battery pack connected, the monomer voltage signal collected carries out communications by isolation and MCU operation control modules, can
Exempt influence of the high voltage power battery pack to data acquisition system.
Other modules of data acquisition system are powered by power module, are illustrated in figure 2 power supply mould in some embodiments
The design circuit of block, power module are powered by vehicle-mounted 12V DC power supply, and 5V electricity is obtained by regulator LM2596
Pressure, can power to current acquisition module, and the voltage-stabilized power supply that 5V voltages obtain 3.3V by linear voltage regulator AMS1117 again is temperature
Acquisition module and the power supply of MCU operation control modules are spent, is specially：Vehicle-mounted 12V DC power supply line is connected to general supply joint P1, then
12V direct current VCC is converted to by switch KG and diode D1 successively.Switch general supplies of the KG as data acquisition system
Switch, diode D1 one-way conduction characteristic can prevent that power line both positive and negative polarity is anti-inserted and damages data acquisition system, to whole
Individual system plays a part of protection.12V direct current VCC exports through voltage regulator LM2596 and its peripheral adjunct circuit
5V burning voltages can be powered to current acquisition module, and light emitting diode D4 therein is 5V voltage output indicator lamps.5V electricity
Pressure can obtain 3.3V burning voltages to temperature collect module and MCU computings by AMS1117 voltage-stablizers and peripheral adjunct circuit
Control module is powered, and wherein light emitting diode D2 is 3.3V voltage output indicator lamps.
Monomer voltage acquisition module designs：
The monomer voltage acquisition module of data acquisition system selects Linear Technology battery pack monitor
LTC6811-2 (LTC6804-2 also can be used) is used as monomer voltage acquisition chip, i.e. collection plate.LTC6811-2 is a more piece
Battery pack monitor, every measurable up to 12 Stringing cells simultaneously have the overall measurement error less than 1.2mV.0V to 5V electricity
Pond measurement range makes LTC6811-2 turn into the suitable choosing that most of battery chemistries form.All 12 batteries can be in 290 μ s
Measurement is completed, and relatively low data acquisition rate may be selected to realize that strong noise suppresses.Can be multiple LTC6811-2 devices simultaneously
Connection uses, and is monitored while realizing battery in long high-voltage battery string.Multiple devices are connected in parallel to be connected to by bus
MCU operation control modules, each device is addressed individually.
Digital channel isolation need not be specially set between LTC6811-2 and bus, pass through isoSPI isolated twisted-pair cables
It is attached, the transmission rate of data is not susceptible to the interference of electromagnetic signal in actual condition up to 1Mbps.This monomer voltage is adopted
Collect module in every LTC6811-2 separately as one piece of collection plate, every piece of collection plate by isoSPI twisted pair line connections extremely
IsoSPI buses, so as to form a module.
LTC6811-2 concrete configuration and the mode of connection are as shown in Figure 3 in every piece of collection plate.V- pins are as this film
The potential that LTC6811-2 power cathode is connected to the part series battery gathered required for this film by magnetic bead L0 is minimum
Point.The RC wave filters that V+ is made up of as this film LTC6811-2 positive source resistance R20 and electric capacity C20, then pass through magnetic bead
The potential peak of the part series battery of collection required for L20 is connected to this film.The effect of magnetic bead is to filter out high-tension electricity
The high-frequency interferencing signal of pond group side.Pin C1, C2 ... C12 can connect series-connected cell monomer successively by RC wave filters and magnetic bead L
Positive pole, if the actual battery strings number surveyed is less than 12, remaining pin can be shorted to V+, as Fig. 3 shows the string batteries of measurement 10,
C11, C12 pin are shorted to V+.A0, A1, A2, A3 pin are connected to low and high level to configure the ground of this collection plate by selection
Location, if A0, A1, A2, A3 are all connected to V- and represent address 0000；If A0 is connected to V_REG, A1, A2, A3 is connected to V- and represents ground
Location 0001；If A1, A2, A3 are all connected to V_REG and represent address 1111, therefore four address pins can be configured to 16 different ground
Location.Pin 41,42 is this film LTC6811-2 isoSPI data output interface IP and IM, can be connected to by isolating transformer
IsoSPI buses, enter row data communication.
Further, monomer voltage collection plate is carried out parallel cascade design by the present invention：Monomer voltage acquisition module shares n
(1≤n≤16) individual collection plate；Each collection plate can gather mi(1≤i≤n, 6≤mi≤ 12) monomer voltage of Battery pack string, respectively
Individual collection plate can gather the monomer voltage of different Battery pack strings；Often string battery can be composed in parallel by k battery cell again, k >=1；n
Individual collection plate can be by parallel addressing stack M cell of architecture management, can be according to actual conditions flexible configuration collection plate
Framework mode, the manageable cell number of the monomer voltage acquisition module is：
The specific stacked tandem mode of collection plate is as shown in Figure 4.Can be in parallel by the individual cells of k (k >=1) per Battery pack string
Combine, cell parallel connection adds the output current value of power battery module, while expands its capacity；Each Battery pack
String is mutually in series.The battery strings number actually included according to power battery module, reasonably selects every piece of collection plate measurable
Battery strings number miWith required collection plate number n.The isoSPI interfaces of every piece of collection plate can be connected in parallel to isoSPI buses,
SPI interface of the isoSPI buses again directly with MCU operation control modules is connected.
Monomer voltage acquisition module uses and includes input filter, internal body diodes protection, a/d converter, SPI communication interface
Etc. the voltage acquisition chip being integrated in one, accuracy of data acquisition is higher compared with discrete component, and the sampling period is shorter, anti-outside
Interference performance is stronger.And voltage acquisition module is directly connected with high voltage power battery pack, itself also battery pack by being detected
Power supply, can avoid the high-voltage large current of power battery pack side from directly affecting control section.Each monomer voltage collection mould
Block is made up of multiple collection plates, every piece of collection plate at most 12 Battery pack strings of management, again can be by multiple cells per Battery pack string
Compose in parallel, can be stacked between multiple collection plates by parallel addressing approach, section cells up to a hundred can be managed collectively.
Temperature collect module designs：
The controller of temperature collect module in the present embodiment uses STM32F103C8T6, and temperature detection sensor uses
DS18B20, DS18B20 are monobus digital measurement of temperature sensors, the measurement accuracy under -55 DEG C~+125 DEG C of working environment
0.5 DEG C can be reached, meet the required precision of batteries of electric automobile module temperature data acquisition.Multiple devices can be connected to one
In single data bus, temperature information is read to multiple DS18B20 in bus by read-write sequence timesharing.With traditional NTC temperature
Sensor acquisition scheme is compared, it is not necessary to is increased the additional devices such as a/d converter and multiplexer in addition, is taken controller
I/O port it is few, improve operating efficiency while simplied system structure.
And the device number mounted on data/address bus can not be too many, therefore x single datas are set in this multi-point Temperature Collection module
Bus, often mount y in single data busjIndividual DS18B20 temperature sensors, wherein yjRepresent the temperature mounted in jth single data bus
Number of probes is spent, can be configured according to the actual scaleable of battery modules, the temperature sensor mounted in every single data bus
Number can be differed, then the collectable temperature of multi-point Temperature Collection module is counted out as x × yjIt is individual.This temperature collect module is former
Reason figure is as shown in Figure 5.
Each DS18B20 devices have itself unique CodeID (Address Recognition number), and controller can be by sending not
With CodeID address command, multiple devices on same root data/address bus are addressed and read with corresponding temperature number
According to, the I/O port that every single data bus is connected directly to controller sends digital temperature signal to controller and handled,
The controller of multi-point Temperature Collection module enters row data communication by USART serial ports and MCU operation control modules again, by this multiple spot
The battery pack temperature data that temperature collect module collects report MCU operation control modules.
The data/address bus of unibus structure is used in temperature collect module, can be according to the actual scaleable of power battery pack
The temperature points of collection needed for configuration, it is communicated by serial ports with MCU, is saved MCU resource, is improved at the integral operation of system
Reason ability.
Battery pack current acquisition module designs：
Battery pack current acquisition module gathers current data using Hall current sensor and signal conditioning circuit.Suddenly
Your current sensor has the advantages that measurement accuracy height, fast response time, the linearity are good and reliability is high, is easily installed, full
The design requirement of the number acquisition system of the power battery pack of this electric automobile of foot.Due to Hall current sensor output voltage with
MCU I/O port voltage level mismatches, therefore intermediate demand adds a signal conditioning circuit and carries out voltage matches.
MCU operation control modules design：
MCU operation control modules use microcontroller of the STM32F103 series monolithics as this acquisition system, this implementation
The microprocessor of MCU operation control modules in example uses the STM32 systems based on Cortex-M3 kernels of STMicw Electronics's production
The ARM of row, the concrete model of use is STM32F103ZET6, and its resource and operational capability meet electric automobile power battery group
Requirement of the data collecting system to processor.
MCU operation control modules mainly use SPI interface, USART interfaces, I/O port, CAN interface on STM32.Four
Wire type SPI interface is changed into twin wire isoSPI interfaces by LTC6820 and peripheral circuit, passes through isoSPI twisted-pair feeders and electricity
Pressure acquisition module is communicated, and not only realizes electrical isolation, and enhances the antijamming capability of data transfer, main to be responsible for
Communicated in the data of monomer voltage acquisition module, read the information of voltage of battery modules.MCU passes through the monomer voltage to receiving
Data carry out the total voltage that accumulation calculating can obtain battery modules.USART interfaces are mainly responsible for and multi-point Temperature Collection module
Data communicate, and read the temperature information of battery modules.I/O port is mainly responsible for being communicated with battery pack current acquisition module, reads
The charging and discharging currents information of battery modules.Total data interface of the CAN interface as this battery modules data collecting system, can be with it
His module or Master Control Unit are communicated.
MCU operation control modules are by handling the monomer voltage data received, it can be deduced that battery modules
Total voltage, it is not necessary to which separately plus battery modules total voltage acquisition module, simplified system are cost-effective.
Embodiment described above only expresses embodiments of the present invention, and its description is more specific and detailed, but can not
Therefore it is interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that any one skilled in the art does not pay
Change obtained from going out creative work is replaced, and should all belong to protection scope of the present invention.Therefore, protection of the invention
Scope should be based on the protection scope of the described claims.
Claims (7)
1. a kind of data collecting system of batteries of electric automobile module, it is characterised in that gathered including power module, monomer voltage
Module, current acquisition module, temperature collect module and MCU operation control modules,
The power module is respectively the current acquisition module, temperature collect module and the power supply of MCU operation control modules；
The monomer voltage acquisition module connects the batteries of electric automobile module, by batteries of electric automobile module power supply simultaneously
Gather the monomer voltage data of the batteries of electric automobile module；
The current acquisition module is used for the charging and discharging currents data for gathering the batteries of electric automobile module；
The temp probe of the temperature collect module is uniformly arranged in the battery module of electric vehicle, gathers the electronic vapour
The temperature data of car battery module；
The MCU operation control modules connect monomer voltage acquisition module, current acquisition module and the temperature collect module, right
The monomer voltage acquisition module, current acquisition module and temperature collect module carry out Control on Communication and received with being adopted described in processing
Monomer voltage data, charging and discharging currents data and the temperature data of the batteries of electric automobile module of collection；
The monomer voltage acquisition module includes n collection plate, 1≤n≤16；I-th piece of collection plate gathers miThe monomer of Battery pack string
Voltage, 1≤i≤n, 6≤mi≤12；It is described all to be composed in parallel per Battery pack string by k cell, k >=1；The then monomer
The number M of the cell of voltage acquisition module management is：
<mrow>
<mi>M</mi>
<mo>=</mo>
<mi>k</mi>
<munderover>
<mo>&Sigma;</mo>
<mn>1</mn>
<mi>n</mi>
</munderover>
<msub>
<mi>m</mi>
<mi>i</mi>
</msub>
</mrow>
The n collection plate manages M cell by way of parallel addressing；
The temperature collect module includes controller and more single data buses for being connected with the controller, on the data/address bus
Mount multiple temperature sensors.
2. the data collecting system of batteries of electric automobile module according to claim 1, it is characterised in that the power supply mould
Block includes regulator and linear voltage regulator, and the input of the power module connects vehicle-mounted 12V DC power supply, passed through
Export 5V voltages after the regulator to power for the current acquisition module, the 5V voltages are by described linear steady
It is that the temperature collect module and MCU operation control modules are powered that 3.3V voltages are exported after depressor, the type of the switching regulaor
Number it is LM2596, the model AMS1117-3.3 of the linear voltage regulator.
3. the data collecting system of batteries of electric automobile module according to claim 1, it is characterised in that the MCU fortune
Calculate control module includes SPI using STM32F103 series monolithics as microcontroller, the STM32F103 series monolithics
Interface, USART interfaces, I/O interface and CAN interface, the SPI interface by LTC6820 chips be converted into isoSPI twisted-pair feeders with
The voltage acquisition module is communicated, and the USART interfaces connect the temperature collect module and communicated, the I/O interface
Connect the current acquisition module to be communicated, total data interface of the CAN interface as the data collecting system.
4. the data collecting system of batteries of electric automobile module according to claim 3, it is characterised in that the electric current is adopted
Collection module includes Hall current sensor and signal conditioning circuit, and the Hall current sensor gathers the batteries of electric automobile
The charging and discharging currents of module and the voltage after the signal conditioning circuit with the MCU operation control modules I/O interface
Match somebody with somebody.
5. the data collecting system of batteries of electric automobile module according to claim 1, it is characterised in that the collection plate
Using battery pack monitor LTC6811-2.
6. the data collecting system of the batteries of electric automobile module according to claim 3 or 5, it is characterised in that described every
Block collection plate is entered by isoSPI twisted pair line connections to isoSPI buses, and by SPI interface and the MCU operation control modules
Row communication.
7. the data collecting system of batteries of electric automobile module according to claim 1, it is characterised in that the controller
Model STM32F103C8T6, the model DS18B20 of the temperature sensor.
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Cited By (5)
| 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: 20180313 |