CN108357361A - A kind of electric automobile power battery safety monitoring device and method - Google Patents
A kind of electric automobile power battery safety monitoring device and method Download PDFInfo
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- CN108357361A CN108357361A CN201810426483.XA CN201810426483A CN108357361A CN 108357361 A CN108357361 A CN 108357361A CN 201810426483 A CN201810426483 A CN 201810426483A CN 108357361 A CN108357361 A CN 108357361A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0069—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to the isolation, e.g. ground fault or leak current
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/545—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/547—Voltage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/549—Current
-
- 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
-
- 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
Abstract
The invention discloses a kind of electric automobile power battery safety monitoring device and methods, monitoring device includes data collecting system, data transmission system, data-storage system and condition monitoring system, and condition monitoring system includes data process subsystem, execution module and telecommunication unit.Collected battery status data is sent into data-storage system by data transmission system and cached by data collecting system, while being injected into data process subsystem, and recognizing module by on-line parameter is detected the internal resistance of battery cell.Assessment indicator system carries out the overall merit of cell safety state by combining based on multifactor multi-level fuzzy logic inference；According to evaluation result and corresponding control strategy is combined, control signal is injected into execution module, realizes the monitoring and control of cell safety.The device has the advantages that systematization, intelligentized, by telecommunication technique, and combines monitor supervision platform, realizes monitoring and the investigation of fault car.
Description
Technical field
The present invention relates to a kind of monitoring of power battery safe condition and control technology more particularly to a kind of electric vehicle are dynamic
Power cell safety monitoring device and method.
Background technology
Electric vehicle is for promoting transportation and energy's strategic transformation, alleviation environmental pollution etc. to be of great importance.Meanwhile electronic vapour
Vehicle timesharing lease can reduce the vehicle population of road, alleviate traffic congestion to a certain extent, and the market demand constantly expands.
However, the accident frequency that related electric vehicle catches fire shows space in a newspaper, therefore the battery system safety problem of electric vehicle also becomes in the industry
The focus of outer extensive concern causes the worry of passenger.Battery system temperature is excessively high, leakage, soak, overcharge, crosses to put etc. and all draw
The main reason for sending out batteries caught fire.Therefore, the safe condition of battery system is monitored in real time for avoiding unexpected personnel
Injures and deaths and property loss are significant.
Patent No. 201610007757.2 discloses a kind of safety monitoring for each battery unit in battery system
System, by the lithium battery module with sensor, signal control module realize the temperature to inside battery, pressure, vibrations,
The intrinsic datas such as Displacement-deformation, positive and negative anodes pole piece change in location, to make detection data more objective reflect in battery
The actual conditions of portion's battery core provide more accurate data for the security application of power battery.
In the prior art：
Patent No. 201610887924.7 discloses a kind of new-energy automobile power battery security system comprising control
Unit, alarm sensor and extinguishing device.The invention can find in time the temperature anomaly of electrokinetic cell system and to its into
Row quickly processing effectively solves the problems, such as to catch fire to time lag existing for fire extinguishing procedure is implemented from burst, reduces security risk.
Patent No. 201710031763.6 discloses a kind of cell safety detection device comprising power supply, detection device,
Control device and warning device.By above-mentioned apparatus it is possible to prevente effectively from when single battery temperature is more than preset value, battery is caused
Even quick-fried spray occurs for module failure, in turn results in the problem of casualties and electrical equipment are damaged.
Patent No. 201710075492.4 discloses safety detection device and the side of a kind of automobile-used lithium battery of electrical salf-walking
Method, the device include anti-explosion box body, pedestal, charging unit, electric discharge device, ultrasonic probe, heating device, second temperature sensing
The components such as device, video camera, air admission hole, venthole, while the security parameters such as analysis lithium, deformation, burning point can be detected.The invention can be with
Detection, the assessment of the disposable multinomial security performance parameter for realizing battery, effectively improve detection efficiency.
Patent No. 201710309496.4 discloses a kind of new energy electric motor vehicle storage battery safety test method, the party
Method is in New energy electric car installation internal resistance measurement instrument, pressure measuring instrument, current measuring instrument and PLC control cabinet.The invention institute
The electromobile battery method for testing security of proposition is easy to use, can easily detect the electrolyte in accumulator, judge whether
It is qualified.
However, a great problem in said program and unresolved cell safety monitoring system, i.e., how effectively intensively
The detection of multiple security performance parameters of battery and relevant device are brought into a system management platform.
Invention content
The object of the present invention is to provide a kind of electric automobile power battery safety monitoring device and methods.
The purpose of the present invention is what is be achieved through the following technical solutions：
The present invention electric automobile power battery safety monitoring device include data collecting system, data transmission system,
Data-storage system, condition monitoring system and new energy system, the output end of the data collecting system and the data
The input terminal of Transmission system is connected, the input terminal of the output end of the data transmission system and the data-storage system (3)
It is connected, the output end of the data-storage system is connected with the input terminal of the condition monitoring system；
The condition monitoring system includes data process subsystem, execution module and remote communication module, at the data
Reason subsystem is connect with execution module, and the data process subsystem includes fuzzy evaluation module and control strategy module.
The method that above-mentioned electric automobile power battery safety monitoring device realizes electric automobile power battery security monitoring,
Include the following steps：
A, data collecting system pair and the relevant data of safe condition of electric automobile power battery are acquired；
B, the data of acquisition are transmitted to data-storage system by data collecting system by data transmission system；
C, after condition monitoring system transfers the data of acquisition from data-storage system, pass through the multifactor safety evaluation of formulation
Index system carries out overall merit in conjunction with fuzzy logic inference to the safe condition of battery, then, data process subsystem according to
The control strategy of formulation exports correct control instruction, and executes corresponding policer operation according to control instruction by execution module；
The overall merit, which is specifically included, carries out the data of acquisition according to the multifactor Safety Index System Assessment of formulation
Classification, sorted data are normalized first, and determine corresponding degree of membership according to fuzzy value and membership function,
By combining based on multifactor fuzzy logic inference, multistage evaluation is carried out to cell safety state, obtains cell safety state
Comprehensive Evaluation as a result, finally obtaining corresponding control information.
As seen from the above technical solution provided by the invention, electric automobile power battery provided in an embodiment of the present invention
There is battery-heating degree, electric leakage degree and combustion possibility detection and respective battery to control safely for safety monitoring device and method
System strategy, it integrates purpose monitoring, security alarm, remote control function, and the synthesis to cell safety state may be implemented
The functions such as monitoring, safeguard protection, the danger warning of property.Pure electric automobile, fuel electric vehicle, hybrid power can be detected
The cell safety state of the dynamical systems such as automobile and shared electric bicycle, and can be effectively intensively multiple safeties of battery
The detection of energy parameter and relevant device are brought into a system management platform.
Description of the drawings
Fig. 1 is electric automobile power battery safety monitoring device provided in an embodiment of the present invention and the system block diagram of method.
Fig. 2 is wireless transmission principles figure in one embodiment of the present of invention.
Fig. 3 is the structural schematic diagram of new energy system in one embodiment of the present of invention.
Fig. 4, which is that the fuzzy value of one embodiment of the present of invention is corresponding, is subordinate to curve graph.
Fig. 5 is the negative feedback control figure of cooling device in one embodiment of the present of invention.
Fig. 6 is the Multistage fuzzy level overall merit block diagram of the present invention.
Specific implementation mode
The embodiment of the present invention will be described in further detail below.What is be not described in detail in the embodiment of the present invention is interior
Appearance belongs to the prior art well known to professional and technical personnel in the field.
The present invention electric automobile power battery safety monitoring device and method, preferable specific implementation mode be：
The monitoring device of electric automobile power battery safety includes data collecting system, data transmission system, data storage
System, condition monitoring system and new energy system, the output end of the data collecting system and the data transmission system
Input terminal be connected, the output end of the data transmission system is connected with the input terminal of the data-storage system (3), institute
The output end for stating data-storage system is connected with the input terminal of the condition monitoring system；
The condition monitoring system includes data process subsystem, execution module and remote communication module, at the data
Reason subsystem is connect with execution module, and the data process subsystem includes fuzzy evaluation module and control strategy module.
The new energy system includes solar panels and accumulator, the new energy system respectively with the number
It is connected by harness according to acquisition system, data transmission system, data-storage system, data process subsystem.
The input terminal of the data collecting system is joined with temperature sensor, voltage sensor, current sensor, state respectively
Number estimator, humidity sensor, insulation monitoring module, smoke sensor device, flame sensor are connected.
The output end of the execution module is single with cooling device, protection circuit, extinguishing device, display unit and alarm respectively
Member is connected.
The method that above-mentioned electric automobile power battery safety monitoring device realizes electric automobile power battery security monitoring,
Include the following steps：
A, data collecting system pair and the relevant data of safe condition of electric automobile power battery are acquired；
B, the data of acquisition are transmitted to data-storage system by data collecting system by data transmission system；
C, after condition monitoring system transfers the data of acquisition from data-storage system, pass through the multifactor safety evaluation of formulation
Index system carries out overall merit in conjunction with fuzzy logic inference to the safe condition of battery, then, data process subsystem according to
The control strategy of formulation exports correct control instruction, and executes corresponding policer operation according to control instruction by execution module；
The overall merit, which is specifically included, carries out the data of acquisition according to the multifactor Safety Index System Assessment of formulation
Classification, sorted data are normalized first, and determine corresponding degree of membership according to fuzzy value and membership function,
By combining based on multifactor fuzzy logic inference, multistage evaluation is carried out to cell safety state, obtains cell safety state
Comprehensive Evaluation as a result, finally obtaining corresponding control information.
The multifactor Safety Index System Assessment includes three classes first class index, respectively reflects the finger of battery-heating degree
The index of mark, the index of reflection battery drain degree, reflection battery combustion possibility.
Reflect that the index of battery-heating degree includes：Temperature, voltage, and/or electric current and/or state-of-charge；
Reflect that the index of battery drain degree includes：Humidity and/or insulation；
Reflect that the index of battery combustion possibility includes：Smog and/or flame.
Multistage evaluation described in step C specifically includes：
First respectively to reflecting that the index, the index for reflecting battery drain degree, reflection battery of battery-heating degree are inflammable
The data factors collection of the index of degree carries out level-one fuzzy evaluation；
Then the set of factors result that level-one is judged judged as two level carries out two-level appraisement to cell safety state,
Finally obtain the Comprehensive Evaluation result of cell safety state.
Policer operation in step C includes：Cooling, cut-out circuit, fire extinguishing, display, alarm and remote monitoring.
The electric automobile power battery safety monitoring device and method of the present invention has battery-heating degree, electric leakage degree
With combustion possibility detection and respective battery safety control strategy, it collects purpose monitoring, security alarm, remote control function in one
The functions such as the comprehensive monitoring to cell safety state, safeguard protection, danger warning may be implemented in body.
In the electric automobile power battery safety monitoring device of the present invention：
Data collecting system is acquired for the relevant data of safe condition to electric automobile power battery；Data
Collected data are transmitted to data-storage system by acquisition system by data transmission system；Condition monitoring system is deposited from data
After storage system transfers the data of storage, by the multifactor Safety Index System Assessment of formulation, in conjunction with fuzzy logic inference to adopting
The data of collection carry out overall merit, and export correct control instruction, and execute corresponding policer operation；Condition monitoring system packet
Include data process subsystem, execution module and telecommunication unit；Data process subsystem is commented by the multifactor safety of formulation
Valence index system carries out overall merit in conjunction with fuzzy logic inference to the data of acquisition, and then data process subsystem is according to system
Fixed control strategy exports correct control instruction；Execution module, for executing corresponding policer operation according to the control information；Far
Journey communication unit, for cell safety status information and bus location to be sent to remote monitoring platform.The overall merit
The degree of membership for determining each evaluation index using expertise is specifically included, and is combined based on multifactor fuzzy logic inference, it is right
Cell safety state carries out multistage evaluation, obtains the Comprehensive Evaluation of cell safety state as a result, and obtaining controlling information accordingly.
Above-mentioned cell safety monitoring device is powered using new energy system, and new energy system includes the sun
It can plate and accumulator.
The data of above-mentioned data collecting system acquisition are classified according to the multifactor Safety Index System Assessment of formulation.Point
Data after class carry out Fuzzy processing by fuzzy inference rule, and determine corresponding degree of membership.By to each input data
Degree of membership carry out multistage evaluation, obtain the Comprehensive Evaluation result of cell safety state.Wherein, the multifactor safety evaluation of formulation
Index system includes：The index for reflecting battery-heating degree, reflects battery combustion possibility at the index for reflecting battery drain degree
Index.
Above-mentioned data collecting system is obtained by temperature sensor, voltage sensor, current sensor, state-of-charge estimator
It must reflect the data of battery-heating degree；The number of reflection battery drain degree is obtained by humidity sensor, insulation monitoring module
According to；The data of reflection battery combustion possibility are obtained by smoke sensor device, flame sensor.
Execution module in above-mentioned condition monitoring system, including：Cooling device, protection circuit, extinguishing device, display are single
Member, alarm unit.These units can in execution module, can also except execution module, the output end of execution module with
These units are connected, and call corresponding unit to carry out corresponding policer operation according to corresponding control information.Cooling device receives
To after starting control instruction, start to carry out cooling processing to battery system, and control temperature in safe range by feedback.
Protection circuit is used to cut off the power in time when battery is in the state being in extreme danger.If the display of battery comprehensive state is dangerous and electric
Pond combustion possibility is also danger, other than actively cutting off circuit, also to open extinguishing device by control instruction, carry out fire extinguishing behaviour
Make.Display unit, for being shown to the relevant evaluation index and state-evaluation result of battery, is convenient for pipe by indicator light
Reason person checks.Alarm unit combination display unit indicates the Comprehensive Evaluation result of battery status, when battery is in safety
When state, LED green lights light, and buzzer is not alarmed；When battery is in abnormality, LED amber lights light, and buzzer is not reported
It is alert；When battery is in the hole, LED red lights light, buzzer warning.Telecommunication unit is logical with wireless communication server
Cross mobile communications network connection；Wireless communication server is connect with monitor client by ethernet communication mode, and battery is pacified
Full state information and bus location are sent to remote monitoring center.
The electric automobile power battery method for safety monitoring of the present invention, includes the following steps：
Step (1) data collecting system pair and the relevant data of safe condition of electric automobile power battery are acquired；
Collected data are transmitted to data-storage system by step (2) data collecting system by data transmission system；
Data transmission system may be used wireless transport module and be received and be emitted.Wireless transport module is communicated using " one master and multiple slaves "
One receiving terminal of pattern, wireless transport module can receive the data from multiple wireless transport module transmitting terminals.It receives
Data incoming data storage system, storage is in cell safety rating database, so that condition monitoring system calls.It is wireless to pass
The transmitting terminal of defeated module is placed on the data collection site of battery, while being connected with the output end of data collecting system.It is wireless to pass
The receiving terminal of defeated module is placed on the central control system of battery, while being connected with the input terminal of data-storage system, convenient for number
According to storage, processing and evaluation to cell safety state.
After step (3) condition monitoring system transfers the data of acquisition from data-storage system, pass through the multifactor peace of formulation
Full assessment indicator system carries out overall merit, then, data processing subsystem in conjunction with fuzzy logic inference to the safe condition of battery
System exports correct control instruction according to the control strategy of formulation, and executes corresponding monitoring according to control instruction by execution module
Operation；The overall merit, which is specifically included, divides the data of acquisition according to the multifactor Safety Index System Assessment of formulation
Class.Sorted data are normalized first, and determine corresponding degree of membership according to fuzzy value and membership function.It is logical
It crosses in conjunction with based on multifactor fuzzy logic inference, multistage evaluation is carried out to cell safety state, obtains cell safety state
Comprehensive Evaluation is as a result, and obtain controlling information accordingly.
The multifactor Safety Index System Assessment in above-mentioned monitoring method includes three classes first class index, is respectively reflected
The index of battery-heating degree, the index for reflecting battery drain degree, the index for reflecting battery combustion possibility.
Reflect that the index of battery-heating degree includes in above-mentioned monitoring method：Temperature, voltage, and/or electric current and/or charged
State；Reflect that the index of battery drain degree includes：Humidity and/or insulation；Reflect that the index of battery combustion possibility includes：Smog
And/or flame.
Multistage evaluation described in above-mentioned monitoring method step (3) specifically includes：Finger first to reflecting battery-heating degree
The data set progress level-one Comprehensive Evaluation of mark, the index of reflection battery drain degree, reflection battery combustion possibility；Then by level-one
The set of factors that the result of judge is judged as two level carries out two-level appraisement to cell safety state, finally obtains cell safety shape
The Comprehensive Evaluation result of state.
Policer operation in above-mentioned monitoring method step (3) includes：Cooling, cut-out circuit, fire extinguishing, display, alarm and far
Range monitoring
Compared with prior art, the beneficial effects of the invention are as follows：
1. the present invention, can in real time, comprehensively by that can reflect that the multi-group data of the safe condition of battery is detected
Cell safety state is monitored to carry out.
2. the present invention is powered monitoring device by using new energy system, automobile power supply system is reduced
Complexity, while energy conservation and environmental protection.
3. the present invention transmits two kinds of data modes using wireless transmission and serial ports, wiring is simplified, convenient for electricity
Road is integrated, while solving the problems, such as that the data acquired under certain specific environments can not be transmitted by harness.
4. the present invention carries out multi-level synthesis by the way of fuzzy logic inference to multiple cell safety evaluation indexes
Evaluation is realized and more comprehensively, is accurately judged cell safety state, while shortening the security evaluation required time, helps
In the timely implementation of safeguard procedures.
5. the present invention divides the level-one evaluation result and comprehensive evaluation result of index by comprehensive 3 major class, present battery is determined
Safe condition, to formulate corresponding control strategy, be conducive to cell safety carry out real-time control.
6. the present invention carries out cooling processing using cooling device to battery, and is controlled temperature in safe range by feedback
It is interior, contribute to real-time guarantees cell safety.
7. the present invention cuts off the power supply of the battery in the state that is in extreme danger using protection circuit in time, help to protect
Hinder passenger safety, minimizes property loss.
8. the present invention by the way that cell safety status information and bus location are sent to remote monitoring center, contributes to pair
Fault car overhaul and rescue in time.
Specific embodiment：
Based on multifactor electric automobile power battery safety monitoring device, as shown in Figure 1, it includes data collecting system
1, data transmission system 2, data-storage system 3 and condition monitoring system 4, output end and the data of data collecting system 1 pass
The input terminal of defeated system 2 is connected, and the output end of data transmission system 2 is connected with the input terminal of data-storage system 3, data
The output end of storage system 3 is connected with the input terminal of condition monitoring system 4；The condition monitoring system 4 includes data processing
Subsystem 5 and execution module 6, data process subsystem 5 include fuzzy evaluation module 7 and control strategy module 8.
Above-mentioned electric automobile power battery safety monitoring device is powered using new energy system, new energy
System includes solar panels and accumulator.New energy system respectively with data collecting system 1, data transmission system 2, data
Storage system 3, data process subsystem 5 are connected by harness and provide operating voltage.
The input terminal of data collecting system 1 respectively with temperature sensor 9, voltage sensor 10, current sensor 11, state
Parameter estimator 12, humidity sensor 13, insulation monitoring module 14, smoke sensor device 15, flame sensor 16 are connected.
The data monitoring includes execution module 6 and telecommunication unit 22, the output end of execution module 6 respectively with cooling
Device 17, protection circuit 18, extinguishing device 19, display unit 20 are connected with alarm unit 21.
New energy system is a kind of specific example of environmentally friendly power supply, described based on multifactor electric powered motor
The power supply of cell safety monitoring device can also be provided by automobile main power.Since circuit power consumption is relatively low, 10W can be selected too
Positive energy plate, area are about 1000cm2.Accumulator can choose the lithium battery that capacity is 30Ah, ensure continuously to provide 3 days
Energy.Wherein, solar panels are mounted on vehicle roof, fully absorb solar energy.Accumulator can be replaced at any time, to prevent long-term cloudy
It leads to energy deficiency.Microcontroller can select STC89C52 series monolithics, temperature sensor that can select model pt100
Platinum resistance sensor, the Hall voltage sensor of the optional model CHV-25P of voltage sensor, current sensor can
Select the Hall current sensor of model HCS-LTS-50A, state-of-charge that can estimate to obtain by battery management system, humidity passes
The optional model HS1101 capacitance type sensors of sensor, the ion smoke sensor device of the optional model INS-07 of smoke sensor device,
Ultraviolet/infrared composite flame detecting device of the optional model A710/UV/IR2 of flame sensor, the optional model of wireless transport module
For NRF42L01, system insulating resistance is obtained by insulating monitoring circuit measuring.
It will be understood by those skilled in the art that the electronic components such as microprocessor, execution module, each sensor and this field skill
Art personnel's known technology is not limited to the selection of their models the record of this specification, microprocessor, execution module and routine
The connection of electronic device and control planning belong to the common knowledge of those skilled in the art, repeat no more in the present specification, this
Field technology personnel can select known approaches to install each electronic chip according to on-site actual situations.
The monitoring method realized using above-mentioned monitoring device, it includes the following steps：
Step (1) is adopted with 1 pair of data collecting system and the relevant data of safe condition of electric automobile power battery
Collection, and inject data transmission system 2.
Step (2) is as shown in Fig. 2, 1 collected data of data collecting system are transmitted to data transmission by serial communication
Multiple transmitting terminals (slave) of the wireless transport module of system 2, and " one master and multiple slaves " communication pattern is used, by wireless transport module
Receiving terminal (host) receive the data from wireless communication transmitting terminal, and be sent into data-storage system 3.Wireless transport module
Transmitting terminal is placed on the data collection site of battery, while being connected with the output end of data collecting system.Wireless transport module
Receiving terminal is placed on the central control system of battery, while being connected with the input terminal of data-storage system, convenient for data storage,
Processing and the evaluation to cell safety state.
The receiving terminal of wireless transport module deposits the data transmission received to data in step (3) data transmission system 2
In the cell safety rating database of storage system 3, and by data-storage system 3 by the data transmission of storage to condition monitoring system
4。
After step (4) collected data are transferred to condition monitoring system 4 by data-storage system 3, first by data
Each item data is normalized in the fuzzy evaluation module 7 of reason subsystem 5, and fuzzy inference rule is determined using expertise
And determine the membership function of each evaluation index, and fuzzy logic inference is combined, multistage evaluation is carried out to cell safety state, most
The Comprehensive Evaluation result of cell safety state is obtained eventually.
Step (5) determines the safe condition grade of present battery according to the Comprehensive Evaluation result in step (4), then in conjunction with
The evaluation result of 3 class evaluation indexes determines corresponding control strategy, and control instruction is transferred to execution module 6.
Step (6) new energy system respectively with data collecting system 1, data transmission system 2, data-storage system 3,
Data process subsystem 5 is connected by harness and provides stable operating voltage.
In step (4), multifactor Safety Index System Assessment is established as 3 major class first, that is, reflects battery-heating journey
The index of degree, the index for reflecting battery drain degree, the index for reflecting battery combustion possibility；Then expert analysis mode and reality are used
The method that experience combines formulates membership function, determines every data membership of acquisition in the degree of each evaluation index；Then lead to
Cross empirical method determine every evaluation index itself in the classification belonged to corresponding weights and it is of all categories itself in evaluation electricity
Shared weight in the safe condition of pond.Using the data of acquisition as set of factors and according to the multifactor safety evaluation index body of formulation
System classifies, by combining degree of membership and 3 major class evaluation index of weights pair to carry out level-one judge respectively；Finally, level-one is commented
The set of factors that the result sentenced is judged as two level is realized to the Comprehensive Evaluation of cell safety state, obtains a specific battery
The result of safe condition.
After the cooling device 17 receives startup control instruction, start to carry out cooling processing to battery system, and pass through
Feedback is by temperature control in safe range.
The protection circuit 18 is used to cut off the power in time when battery is in the state being in extreme danger.
The display unit 20 shows the relevant evaluation index and state-evaluation result of battery by indicator light.
The alarm unit 21 indicates the Comprehensive Evaluation result of battery status in conjunction with display unit, when battery is in
When safe condition, LED green lights light, and buzzer is not alarmed；When battery is in abnormality, LED amber lights light, and buzzer is not
Alarm；When battery is in the hole, LED red lights light, buzzer warning.
The telecommunication unit 22 is with wireless communication server by mobile communications network (as used GPRS teledatas
Transmission) connection；Wireless communication server is connect with monitor client by ethernet communication mode, is realized cell safety state
Information and bus location are sent to the function of remote monitoring platform.
Wherein, new energy system is as shown in figure 3, new energy system includes solar components, controller, electric power storage
Pond and boosting voltage stabilizing management module.Controller includes charge management module and MPPT controller, solar components and MPPT
Controller connects, and charge management module is connect with accumulator, accumulator is connect with the input terminal of boosting voltage stabilizing management module, is boosted
The output end output voltage of voltage stabilizing management module.The advantages of this structure, is as follows：
1. using MPPT maximal power tracing design concepts first, the efficiency of solar energy utilization is improved.
2. carrying out constant current and constant-voltage charge to battery using power transistor in Charge Management unit.The charhing unit can be with
Charging current is automatically controlled according to the current output capability of input voltage source, the electricity of input voltage source can be maximally utilised
Flow fan-out capability.
3. in order to provide power supply to the acquisition of the data of the present invention, transmission and processing system, using boosting voltage stabilizing administrative unit
The output for adjusting power module, realizes the stability of out-put supply.
Wherein, fuzzy logic control abbreviation fuzzy control is pushed away with fuzzy set theory, Fuzzy Linguistic Variable and fuzzy logic
A kind of computer numerical control (CNC) technology based on reason.The basic thought of fuzzy control is the control that people is realized using computer
Experience, and these experiences are mostly the control rules with relatively vague property expressed with language.
The cardinal principle of fuzzy logic is in the present invention：
1. the method that expert analysis mode is combined with practical experience is used to formulate membership function first, each item number of acquisition is determined
According to the degree for being under the jurisdiction of each evaluation index, and determine that each evaluation index is under the jurisdiction of the degree of cell safety, wherein each evaluation index
And the parameter for being included is as shown in table 1.It determines that degree of membership has certain flexibility, has no unified method, practical application
In can be determined in conjunction with the method for expert analysis mode, although having certain subjectivity, reflect a large amount of experience accumulation.
Table 1：The state evaluation index classification of cell safety is characterized in embodiment
Wherein, battery data is uniformly divided into 5 fuzzy values relative to the evaluation of each evaluation index：Safely, well, just
Often, exception, danger, corresponding membership function u (x) model of each fuzzy value are as follows.
Function model under safe condition：
Function model under kilter：
Function model under normal condition：
Function model under abnormality：
Function model under precarious position：
Wherein, x is the element of fuzzy domain, and above-mentioned degree of membership model has already passed through normalized, value 0~1 it
Between.The corresponding degree of membership curve of five fuzzy values can be made by the tool boxes MATLAB, as shown in Figure 4.
2. comprehensive index system is then divided into 3 major class, that is, reflect index, the reflection battery drain journey of battery-heating degree
3 major class are carried out level-one Comprehensive Evaluation by the index of degree, the index for reflecting battery combustion possibility respectively.By combining each input number
According to degree of membership and itself institute's belonging kinds weights, to each factor of evaluation carry out level-one fuzzy evaluation.Wherein, level-one is commented
The result sentenced can be formulated as：
Wherein, CiIndicate the level-one evaluation result of the i-th class, AiIndicate weight (a) allocation matrix of each factor in the i-th class,
Wherein j indicates the quantity of each factor in the i-th class.BiIndicate the degree of membership u matrix of each factor in the i-th class.Flexible strategy allocation matrix Ai
Normalizing condition should be met, i.e.,Wherein, n is the quantity of each factor in the i-th class.For example, when i=1, j=5, A1's
Value is A1=(0.3,0.1,0.2,0.1,0.3)；When i=2, j=2, A2Value be A2=(0.5,0.5)；When i=3, j=
2, A3Value be A3=(0.5,0.5).
3. the single factor test that the fuzzy evaluating matrix of level-one is judged as two level, the synthesis of cell safety state is commented in realization
Sentence.Wherein the result of Comprehensive Evaluation can be formulated as：
Wherein, E indicates the comprehensive evaluation result of cell safety state.P indicates power all kinds of under cell safety status categories
Weight (d) allocation matrix.C is level-one evaluation result (c) matrix of the i-th class.Weight distribution matrix P should meet normalizing condition, i.e.,For example, P values are：P=(0.3,0.3,0.4), i.e., weights are assigned as：Battery-heating degree is 0.3, battery drain
Degree is 0.3, and battery combustion possibility is 0.4.The Multistage fuzzy level overall merit block diagram is as shown in Figure 6.
Wherein, the cell safety state evaluation obtained according to fuzzy logic inference, using control strategy by execution module pair
Battery system control and monitor accordingly.Display unit in execution module refers to the relevant evaluation of battery by indicator light
It is marked with and state-evaluation result carries out real-time display, the safe condition of battery system is monitored convenient for personnel.Cell safety
State is divided into safety, exception, dangerous three kinds of situations.Wherein under safe condition, green indicator light lights；Under abnormality, yellow
Indicator light lights；Under precarious position, red indicating light lights, and by the buzzer warning in alarm unit.Secondly, by long-range
Cell safety status information is sent to remote monitoring center by communication device.Next according to cell safety state evaluation result into
The implementation of row control strategy.If battery comprehensive state is non-security and battery-heating degree is also non-security, then to mould is executed
The cooling device of block sends cooling control instruction, carries out cooling processing to battery, and pacifying temperature control by Fuzzy strategy
In gamut.As shown in figure 5, by battery-heating level index the corresponding degree of membership of normal condition with currently patrolled by fuzzy
It collects the corresponding degree of membership of battery surface temperature that reasoning obtains to be compared, input of the comparison result as negative feedback control circuit
Signal controls the start and stop of cooling device.If battery comprehensive state is that dangerous and battery-heating degree is also dangerous, pass through protection
Circuit actively cuts off battery supply.If battery comprehensive state is that dangerous and battery drain degree is also dangerous, equally actively cut
Deenergizing.If battery comprehensive state is that dangerous and battery combustion possibility is also dangerous, circuit is actively cut off, and open fire extinguishing
Device is put out a fire.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art is in the technical scope of present disclosure, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (9)
1. a kind of monitoring device of electric automobile power battery safety, which is characterized in that including data collecting system (1), data
Transmission system (2), data-storage system (3), condition monitoring system (4) and new energy system, the data collecting system
(1) output end is connected with the input terminal of the data transmission system (2), the output end of the data transmission system (2) with
The input terminal of the data-storage system (3) is connected, output end and the condition monitoring system of the data-storage system (3)
The input terminal of system (4) is connected；
The condition monitoring system (4) includes data process subsystem (5), execution module (6) and remote communication module (22), institute
It states data process subsystem (5) to connect with execution module (6), the data process subsystem (5) includes fuzzy evaluation module (7)
With control strategy module (8).
2. electric automobile power battery safety monitoring device according to claim 1, which is characterized in that the new energy supplies
Electric system includes solar panels and accumulator, and the new energy system is passed with the data collecting system (1), data respectively
Defeated system (2), data-storage system (3), data process subsystem (5) are connected by harness.
3. electric automobile power battery safety monitoring device according to claim 2, which is characterized in that the data acquisition
The input terminal of system (1) respectively with temperature sensor (9), voltage sensor (10), current sensor (11), state estimation
Device (12), humidity sensor (13), insulation monitoring module (14), smoke sensor device (15), flame sensor (16) are connected.
4. electric automobile power battery safety monitoring device according to claim 3, which is characterized in that the execution module
(6) output end is single with cooling device (17), protection circuit (18), extinguishing device (19), display unit (20) and alarm respectively
First (21) are connected.
5. a kind of Claims 1-4 any one of them electric automobile power battery safety monitoring device realizes that electric vehicle is dynamic
The method of power cell safety monitoring, which is characterized in that include the following steps：
A, data collecting system pair and the relevant data of safe condition of electric automobile power battery are acquired；
B, the data of acquisition are transmitted to data-storage system by data collecting system by data transmission system；
C, after condition monitoring system transfers the data of acquisition from data-storage system, pass through the multifactor safety evaluation index of formulation
System carries out overall merit in conjunction with fuzzy logic inference to the safe condition of battery, and then, data process subsystem is according to formulation
Control strategy export correct control instruction, and corresponding policer operation is executed according to control instruction by execution module；
The overall merit, which is specifically included, classifies to the data of acquisition according to the multifactor Safety Index System Assessment of formulation,
Sorted data are normalized first, and determine corresponding degree of membership according to fuzzy value and membership function, pass through
In conjunction with based on multifactor fuzzy logic inference, multistage evaluation is carried out to cell safety state, obtains the comprehensive of cell safety state
Evaluation result is closed, corresponding control information is finally obtained.
6. the method for electric automobile power battery security monitoring according to claim 5, which is characterized in that described multifactor
Safety Index System Assessment includes three classes first class index, respectively reflects index, the reflection battery drain journey of battery-heating degree
The index of degree, the index for reflecting battery combustion possibility.
7. the method for electric automobile power battery security monitoring according to claim 6, it is characterised in that：
Reflect that the index of battery-heating degree includes：Temperature, voltage, and/or electric current and/or state-of-charge；
Reflect that the index of battery drain degree includes：Humidity and/or insulation；
Reflect that the index of battery combustion possibility includes：Smog and/or flame.
8. the method for electric automobile power battery security monitoring according to claim 7, which is characterized in that institute in step C
Multistage evaluation is stated to specifically include：
First respectively to reflecting the index of battery-heating degree, the index for reflecting battery drain degree, reflecting battery combustion possibility
Index data factors collection carry out level-one fuzzy evaluation；
Then the set of factors result that level-one is judged judged as two level carries out two-level appraisement, finally to cell safety state
Obtain the Comprehensive Evaluation result of cell safety state.
9. the method for electric automobile power battery security monitoring according to claim 8, it is characterised in that：In step C
Policer operation includes：Cooling, cut-out circuit, fire extinguishing, display, alarm and remote monitoring.
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