CN202749476U - Intelligent electromobile battery management system - Google Patents
Intelligent electromobile battery management system Download PDFInfo
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- CN202749476U CN202749476U CN2011205105849U CN201120510584U CN202749476U CN 202749476 U CN202749476 U CN 202749476U CN 2011205105849 U CN2011205105849 U CN 2011205105849U CN 201120510584 U CN201120510584 U CN 201120510584U CN 202749476 U CN202749476 U CN 202749476U
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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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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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Abstract
The utility model relates to an intelligent electromobile battery management system. A core control module is connected with N battery data acquisition modules through a K bus and is connected with a charging module, a battery pack monitoring module and a touch screen display system; a database management module, the battery pack monitoring module, a self-checking control module and an abnormal control module are provided; the battery data acquisition modules are provided with a plurality of battery data acquisition control chips; and the core control module is connected to a computer through a universal serial bus (USB) interface. The intelligent electromobile battery management system overcomes the defects that real-time and dynamic comparison cannot be performed in the past and the corresponding failure processing function and a mutual information platform are not provided. The intelligent electromobile battery management system realizes acquisition, state of charge (SOC) estimation, communication, balancing and insulation monitoring on data comprising voltage, current, temperature and the like of the battery, compares with each standard data in a database, establishes a dynamic comparison model and adopts a layered mode; the control module is in charge of voltage, current and temperature; and interaction with users and alarm are realized by the touch screen.
Description
Technical field
The utility model relates to a kind of battery of electric vehicle system, particularly Intelligent battery management system of electric car.
Background technology
Along with the development of electric automobile, the battery as power is had higher requirement, namely must manage the voltage of battery (normally battery pack), electric current, temperature etc.
Before the present utility model, used for the battery of electric vehicle management system (being called for short BMS) of plumbic acid and Ni-MH battery and lithium battery.It exists does not possess data storage function, can not be with the measurement data of current battery pack with the state of battery and the battery status of standard carry out in real time, contrast dynamically before, thereby judge whether defective working properly of battery, it is lower to cause carrying out efficient, and lacks corresponding troubleshooting function.Battery of electric vehicle management system before lacks a mutual information platform for common user.
Summary of the invention
The purpose of this utility model will overcome defects exactly, designs a kind of Intelligent battery management system of electric car.
The technical solution of the utility model is:
Intelligent battery management system of electric car, its technical characteristics are that kernel control module connects N battery data acquisition module through the K bus, and kernel control module connects charging module, battery pack monitoring modular and touch screen display system; Described kernel control module has database management module, battery pack monitoring modular, self check control module, unusual control module; Described battery data acquisition module includes a plurality of battery datas and gathers control chip; Described kernel control module connects vehicle body CAN bus to the vehicle-mounted CAN bus apparatus; Described kernel control module adopts usb interface or RJ45 interface to be connected to computer.
Advantage of the present utility model and effect are except realizing the functions such as data such as voltage, electric current and temperature to battery gather, SOC estimation, real time communication, equilibrium, insulating monitoring, also voltage, electric current and the temperature data of real-time each battery unit of detection, and compare with the normal data of each characteristic in the database, set up dynamic contrast model.If the data that gather have surpassed database Plays value ± X% (X is for calculating according to data such as Current Temperatures and access times), then by dysgnosis treatment system control corresponding actions.Once store data every day, accesses data from database when the battery operation situation is checked reference is provided.Owing to taked layered model to operate, kernel control module mainly is responsible for carrying out logic and is judged that acquisition module is responsible for data acquisition, and control module is responsible for the control of voltage, electric current and temperature.Communicate simultaneously discharge and the charging action of Based Intelligent Control battery group by mode bus and battery charging module, and undertaken mutual and warning by mode and the user of touch-screen.
Other advantages of the present utility model and effect will go on to say below.
Description of drawings
Fig. 1---the utility model total system framework schematic diagram.
Fig. 2---the framework schematic diagram of battery data acquisition module among Fig. 1.
Fig. 3---the framework schematic diagram of battery detection bus among Fig. 2.
Fig. 4---the framework schematic diagram of battery management system kernel control module among Fig. 1.
Fig. 5---insulating monitoring functions of modules schematic diagram among Fig. 4.
Fig. 6---touch-screen schematic diagram among Fig. 4.
Fig. 7---battery curve synoptic diagram in the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described:
As shown in Figure 1:
The utility model comprises battery management system kernel control module (hereinafter to be referred as kernel control module) and battery data acquisition module, communicate by the K bus between kernel control module and the battery data acquisition module, N (N=1 is arranged simultaneously, 2,3...) individual battery data acquisition module is connected to the battery management system kernel control module, simultaneously to N (N=1,2,3...) individual battery pack carries out voltage, electric current, the detection of temperature and internal resistance.The present invention gather M * N array (M, N=1,2,3...), we are take one 6 * 8 array as example here, this array has 8 battery pack, every group has 6 batteries.The battery data acquisition module divides 4 collection plates, and every collection plate is responsible for 2 battery pack are carried out voltage, electric current, and temperature and internal resistance gather.
Such as Fig. 2, shown in Figure 3:
The model of battery data acquisition module employing Freescale is that the single-chip microcomputer of MC9S08AW32 gathers control chip as battery data, communicates to the collection of battery data with the battery management system kernel control module.The battery data acquisition module is to the monoblock battery collecting method; The battery detection bus is with the voltage of 6 batteries, and electric current and temperature information send to the battery data acquisition module, connects the K bus by the battery data acquisition module, sends to the battery management system kernel control module.To be the battery detection chip DS2438 that produces take DALLAS company consist of the battery detection bus module as core to the battery detection bus, by increasing quarantine measures, data wire is improved to the sending and receiving two-wire system by one wire system, and adopt polling mode and battery data acquisition module to communicate, each photoelectric isolation module has independently address code, and its structured flowchart as shown in Figure 3.The battery data of battery data acquisition module gathers control chip and sends an address code to the battery detecting bus, and then the battery detecting chip corresponding with address code sends to battery data with voltage, electric current and temperature data by the battery detecting bus and gather control chip.
Internal resistance measurement adopts the pressure drop internal resistance measurement method that exchanges, by apply a fixed frequency and fixed current (present normal operation 1KHZ frequency to battery, the little electric current of 50mA), then its voltage is sampled, after a series of processing such as over commutation, filtering, calculate the internal resistance value of this battery by discharge circuit.
Battery data gathers control chip and will be stored in the specific memory section by cell voltage, electric current, temperature and the internal resistance data of battery detecting bus collection, when the battery data acquisition module receives the querying command of battery management system kernel control module from the K bus, then will be stored in battery parameter information exchange in the specific memory section and cross the K bus and send to the battery management system kernel control module.
Kernel control module mainly is responsible for the real-time battery parameter information data that 4 battery data acquisition modules are sent by the K bus and is carried out Macro or mass analysis, by a quick MySQL database of lightweight, store these information, and and database in normal data whether compare the real-time judge battery working properly, be that the vehicle-mounted CAN bus apparatus communicates that (CAN is the abbreviation of CONTROLLER AREANETWORK by vehicle body CAN bus and Full Vehicle System, refer to controller area network), the work of Based Intelligent Control charger; Main control chip adopts the ARM9 series microprocessor, transplants the fit embedded Linux system of cutting out.
As shown in Figure 4:
The battery management system kernel control module mainly is divided into: battery pack detection module, self check control module, touch-screen display module, SOC estimating module, communication module, unusual control module and database management module.
As shown in Figure 5:
The battery pack monitoring modular is divided into battery pack parameter acquisition ADC module (ADC is the abbreviation of Analog-to-Digital Converter, finger print/number converter or analog/digital converter) and insulating monitoring module.Battery pack parameter acquisition ADC module is obtained voltage, electric current and temperature value on every row battery pack by the ADC change-over circuit, and these data are delivered to self check control module and database management module.By measuring the voltage between electric automobile dc bus and the electric chassis, weigh the insulation situation of electric motor car by the insulating resistance value that calculates system.High voltage insulation system principle frame.
The direct current system voltage (being the battery total voltage) of design electrical automobile is u, positive and negative bus to be measured and the insulation resistance between the electric chassis are respectively Rp, Rn, voltage between positive and negative bus and the electric chassis is respectively Up, Un, shown in the equivalent model of direct current system to be measured then, the dotted line frame among the figure.Rc1, Rc2 among the figure are the standard resistor of measuring known resistance.Measuring principle is: when switch S 1, S2 all disconnect, measure voltage between positive and negative bus and the electric chassis and be respectively up, un and obtain formula 1 by circuital law.
When switch S 1 closure, S2 disconnect, then measure voltage between positive and negative bus and the electric chassis and be respectively Upp, Unp and obtain equally formula 2 having added standard biasing resistor chi between positive bus-bar and the electric chassis.
United to find the solution by above-mentioned formula and obtain formula 3 and formula 4.
Equally, insulation resistance also obtains in following two kinds of situations:
(1) S1, S2 all disconnect and S1 disconnects, S2 is closed;
(2) S1 is closed, S2 disconnects and S1 disconnects, S2 is closed.
Obtain insulation resistance Rp or Rn by above-mentioned computing formula, and send to the self check control module.
As shown in Figure 4:
The SOC estimating module is responsible for detecting battery pack state-of-charge (State of Charge), i.e. battery dump energy.The parameters such as cell voltage, electric current and temperature that the SOC estimating module detects by receiving the battery data acquisition module, employing ampere-hour method is estimated the SOC of battery, record from the energy of storage battery output or the energy of input storage battery by the method to current integration, again according to the initial SOC state that discharges and recharges, and in algorithm, consider temperature-compensating, self discharge and the many factors such as aging to battery, SOC value of battery is estimated.And the dump energy of battery sent to the touch-screen driver module, the dump energy of battery is presented on the screen.
The self check control module is responsible for the data of passing through real-time each battery unit that receives of K bus in the Test database, receive simultaneously the supplemental characteristic that battery pack parameter acquisition ADC module and insulating monitoring module gather, then the normal data in these data and the database carried out in real time, contrast dynamically, and set up dynamic analytical model, judge whether overvoltage is arranged, overcurrent, excess Temperature and battery pack electric leakage etc. are unusual.If there is unusually, then self check control module is sent fault-signal to unusual control module, makes corresponding failure protecting device work.The failure code that the self check control module is unusual with these stores in the database.The self check control module is presented at error message on the screen of touch-screen by transmitting a signal to the touch-screen driver module, informs the driver, describes in detail and sees touch-screen display module.
Unusual control module realizes charging controller, equalizing charge, overcurrent, overvoltage, overheat protector and crash protection function.Unusual control module is received from the abnormal operation order of inspection control module transmission and carries out corresponding safeguard measure.Wherein charging controller and equalizing charge function are implemented in the charging process; the self check control module detects the data such as charging voltage, electric current and temperature; if find the signals such as overvoltage, overcurrent and excess temperature; rub-out signal is sent to unusual control module; charging voltage or electric current to charging module are regulated, and the charging of battery pack is monitored and protected.Overcurrent, overvoltage, overheat protector function are found voltage in the battery power discharge process, when electric current or excess Temperature, the battery pack that the energy automatic disconnection is broken down or the operations such as power output of regulating cell group reach protection power source and security of operation.The crash protection function is used in time disconnecting whole battery pack at electric automobile when having an accident, and prevents from contingency occurring because of battery pack.
The System data management module is in embedded Linux system, uses fast small-sized Relational DBMS MySQL of lightweight.The battery data acquisition module sends to the battery management system kernel control module by the K line with data such as the voltage of 8 each battery unit of row battery pack, electric current, temperature, and stores data in the MySQL database; Store the voltage of every row battery pack, electric current and temperature data, the overall operating position of record battery is for later battery Inspection and maintenance provides reference; The data of the each estimation of storage SOC estimating module; Store each self check control module and find the error code information of fault; The each punching electricity of record and the number of times of putting a little; Record each overshoot or cross number of times and the reason of putting.
Communication module comprises the CAN bus communication, the K bus communication, and usb communication is communicated by letter with RJ45.Wherein the CAN bus realizes communicating by letter between other mobile units.The K bus communication realizes receiving the voltage that the battery data acquisition module gathers battery pack, electric current, the function of temperature and internal resistance data.The data communication of management end.Usb communication is communicated by letter with RJ45 and is realized communicating with the computer battery management software.
Computer control software realize to use the interfaces such as USB or RJ45 and computer to communicate, by the specical software system realization human-computer interaction function of independent research.Computer control software reads the parameters such as the battery information (all parameters that comprise battery performance) stored in the database of battery management system kernel control module and failure code, and it is carried out data backup.To send to the battery management system kernel control module to discharging and recharging time, charging voltage, the isoparametric setting of alarm voltage by USB or RJ45 communication mode simultaneously.Computer software software adopts VC Programming close friend's man-machine interface, can realize arranging the various parameters of system's operation; Realize the functions such as monitoring, data dump and battery performance analysis of battery pack data; Display alarm information shows the positional information of problematic battery in battery pack.The parameter that input will arrange in computer software, after click arranged, parameter was sent to the battery management kernel control module by usb communication or RJ45 communication; Read in the database of battery management system kernel control module battery parameter information and in dynamic detection module, show.
Computer control software is analyzed the performance of battery according to the battery historical data in the database of battery management kernel control module, comprises cell health state and fills soon and the impact of trickle charge on battery status.
Such as Fig. 1, shown in Figure 6:
Touch-screen display module is by the state information of the battery that is received from the inspection control module and sends and the battery electric quantity information of SOC estimating module, these data communication devices are crossed being reflected on the display screen of graphical interfaces, by modes such as acousto-optics with the information notification of battery pack to the driver.When detecting the battery electric quantity deficiency when the SOC estimating module, the SOC detection module sends the not enough information of electric weight and sends to the self check control module, the mileage number that the self check control module is calculated dump energy and travelled according to algorithm, and send information to the touch-screen driver module, show (by the prompting bar of literal and flicker dump energy) at touch-screen.When the normal battery unit of all working all is marked as " green ", if the self check control module receives one or the unusual or fault message of Battery pack appearance, then show at screen: unusual by " yellow " expression battery status; " redness " expression battery operation fault.
As shown in Figure 7:
Cell health state is realized the SOC value at different access times be to calculating each battery pack or battery unit, the battery of standard value judgement that provides with reference to producer or the quality of battery pack work.The standard state curve of No. 3 curves for providing supposed when battery capacity is reduced to 15%, namely use general 15 to 1,600 times time this battery need to change.If battery remains on the qualified capacity line of minimum battery (i.e. No. 2 curved portion) at the capacity index line that has moved 15 or 1,600 times then thinks that this battery pack or battery unit are qualified battery.If the capacity index line with a collection of battery all is lower than the normal capacity index line that producer announces, then by using the learning functionality of native system, again demarcate the qualified capacity index line of standard cell capacity index line and minimum battery.If close intelligent control function of the present invention, be starkly lower than the healthy curve of standard cell through the health status curve of test cell, shown in No. 1 curve.
Application process explanation of the present utility model.
As shown in Figure 1:
The battery data acquisition module detects the voltage of battery in real time; electric current and temperature value; and be sent in the battery management system kernel control module with database in standard temperature compare, and automatically battery pack is detected and protects by kernel control module.
Such as Fig. 2, Fig. 3 and shown in Figure 4:
If magnitude of voltage surpasses the standard value range of setting, then at first reduce the speed that electric motor car travels, to reduce the power output of battery pack.Send command battery data acquisition module, make its voltage, current value of detecting each battery unit of battery pack, the set point that electric current, the magnitude of voltage that the battery data acquisition module is detected sends in battery management system kernel control module and the database contrasts.If exceed the scope of set point, then transmit a signal to unusual control module, make overvoltage, overcurrent protective device work, the battery unit that goes wrong is opened circuit from battery pack, with its isolation.
When if excess Temperature appears in battery, at first reduce the power output of battery pack, and start battery heat dissipation device.Send a command to the battery data acquisition module, make its temperature data that gathers respectively each battery unit, and the standard temperature that all temperature datas are sent in battery management system kernel control module and the database compares.When the temperature of battery data acquisition module detection has been higher than set point, then transmit a signal to unusual control module, make the over-temperature protection device action, the problem battery unit is broken from battery pack.
If internal resistance occurs when unusual, then send a command to the battery data acquisition module, make its voltage that gathers respectively each battery unit, current data calculates internal resistance value and the standard temperature that sends in battery management system kernel control module and the database compares.When the size of internal resistance value is higher than set point, then transmit a signal to unusual control module, make the work of internal resistance abnormal protection module, battery and battery pack are isolated.
As shown in Figure 4:
The battery pack monitoring modular is with the voltage of the every row battery of battery pack of battery pack parameter acquisition ADC module collection; the data such as electric current and temperature send to the self check control module and carry out the logic judgement; afterwards self check control module transmits a signal to unusual control module; if overvoltage, overcurrent and excess temperature situation appear in battery pack, then use overvoltage, overcurrent, over-temperature protection device control and protection battery pack operating state.
The voltage that the database management module real-time storage is sent by the K line, electric current, internal resistance and temperature data.These data in the SOC estimating module reading out data database management module, the result of calculation of SOC value sent to the self check control module and with result store in database management module.Database management module records the information that each self check control module notes abnormalities, and can communicate by USB or RJ45 interface and computer.
As shown in Figure 5:
The insulation situation of the insulating monitoring module acquisition testing battery pack in the battery pack monitoring modular, if the self check control module is the insulation data exception of battery pack monitoring modular transmission relatively, then send abnormal signal to unusual control module, make the device action that disconnects battery pack, disconnect whole battery pack.
As shown in Figure 6:
The touch-screen driver module is shown as yellow with the battery unit that goes wrong at touch-screen, and the prompting driver that sounds pays close attention to the fault that battery occurs.If this battery unit no-voltage and electric current output then are directly labeled as redness.
Claims (8)
1. Intelligent battery management system of electric car is characterized in that kernel control module connects N battery data acquisition module through the K bus, and kernel control module connects charging module, battery pack monitoring modular and touch screen display system; Described kernel control module has database management module, battery pack monitoring modular, self check control module, unusual control module; Described battery data acquisition module includes a plurality of battery datas and gathers control chip; Described kernel control module connects vehicle body CAN bus to the vehicle-mounted CAN bus apparatus; Described kernel control module adopts usb interface or RJ45 interface to be connected to computer.
2. Intelligent battery management system of electric car according to claim 1 is characterized in that being divided into battery management system kernel control module and battery data acquisition module; Described battery management system kernel control module adopts the K bus to be connected with the battery data acquisition module.
3. Intelligent battery management system of electric car according to claim 1 is characterized in that having in the battery pack monitoring modular insulating monitoring module and battery pack parameter acquisition ADC module; Described insulating monitoring module is connected with the battery pack insulation module; Described battery pack parameter acquisition ADC module is connected with battery pack parameter acquisition module.
4. Intelligent battery management system of electric car according to claim 1 is characterized in that kernel control module connects touch screen display system; Described touch screen display system is connected with touch-screen.
5. a kind of Intelligent battery management system of electric car according to claim 1 is characterized in that in the kernel control module unusual control module, SOC estimating module being arranged; Described unusual control module connects charging module, disconnects the problem circuit module and disconnects battery module; Described SOC estimating module connects self check control module and database management module.
6. Intelligent battery management system of electric car according to claim 1 is characterized in that the database management module in the kernel control module has small-sized MySQL database; Described small-sized MySQL database and K bus, SOC estimating module, the usb communication module is connected with the RJ45 communication module; Described database is deposited normal data, and described MySQL database is deposited the battery data that monitors.
7. battery management system kernel control module according to claim 5 is characterized in that having the self check control module; Described self check control module connects CAN communication module, touch-screen driver module, unusual control module and database management module.
8. Intelligent battery management system of electric car according to claim 3, it is characterized in that insulation measurement module in the insulating monitoring module is that insulation resistance between positive and negative bus and the electric chassis is respectively Rp, Rn, Rp, Rn two ends are respectively through switch S 1, S2 Rc1, Rc2 in parallel.
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| CN103259246A (en) * | 2013-05-28 | 2013-08-21 | 南京海勇电子科技有限公司 | Circuit protector for electric vehicle |
| CN103568863A (en) * | 2013-11-15 | 2014-02-12 | 合肥国轩高科动力能源股份公司 | Real-time monitoring diagnostic system and diagnostic method for electromobile battery management system |
| CN103730929A (en) * | 2013-12-19 | 2014-04-16 | 广西科技大学 | Management method for plumbic acid power battery |
| CN103840224A (en) * | 2014-03-25 | 2014-06-04 | 冯相如 | Extensible type lithium battery management system for electric car |
| CN104009512A (en) * | 2013-02-25 | 2014-08-27 | 波音公司 | Battery module system |
| CN104167800A (en) * | 2014-09-02 | 2014-11-26 | 安徽工程大学 | Lithium battery management system and method capable of expanding communication standby power supply |
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| CN109660000A (en) * | 2019-01-08 | 2019-04-19 | 东莞博力威电池有限公司 | A kind of more battery control methods, system and device |
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| CN103259246B (en) * | 2013-05-28 | 2016-09-07 | 南京海勇电子科技有限公司 | A kind of circuit protector for electric vehicle |
| CN103259246A (en) * | 2013-05-28 | 2013-08-21 | 南京海勇电子科技有限公司 | Circuit protector for electric vehicle |
| CN103568863A (en) * | 2013-11-15 | 2014-02-12 | 合肥国轩高科动力能源股份公司 | Real-time monitoring diagnostic system and diagnostic method for electromobile battery management system |
| CN103568863B (en) * | 2013-11-15 | 2016-01-20 | 合肥国轩高科动力能源有限公司 | Real-time monitoring and diagnosing system and method for battery management system of electric vehicle |
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