CN107234981A - The lithium battery module acquisition system and method with treatment mechanism are diagnosed with secondary failure - Google Patents
The lithium battery module acquisition system and method with treatment mechanism are diagnosed with secondary failure Download PDFInfo
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- CN107234981A CN107234981A CN201710620062.6A CN201710620062A CN107234981A CN 107234981 A CN107234981 A CN 107234981A CN 201710620062 A CN201710620062 A CN 201710620062A CN 107234981 A CN107234981 A CN 107234981A
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 25
- 230000007246 mechanism Effects 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title abstract description 6
- 230000015271 coagulation Effects 0.000 claims abstract description 50
- 238000005345 coagulation Methods 0.000 claims abstract description 50
- 238000004891 communication Methods 0.000 claims abstract description 24
- 238000012545 processing Methods 0.000 claims abstract description 22
- 238000003745 diagnosis Methods 0.000 claims description 34
- 230000005611 electricity Effects 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 8
- 239000000178 monomer Substances 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 7
- 230000009885 systemic effect Effects 0.000 claims description 6
- 238000003672 processing method Methods 0.000 claims description 5
- 235000013399 edible fruits Nutrition 0.000 claims description 4
- 238000012937 correction Methods 0.000 claims description 3
- 230000001351 cycling effect Effects 0.000 claims description 3
- 230000003252 repetitive effect Effects 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims description 2
- 210000004027 cell Anatomy 0.000 description 10
- 230000004044 response Effects 0.000 description 5
- 230000006870 function Effects 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 208000032953 Device battery issue Diseases 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000002123 temporal effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000037424 autonomic function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
-
- 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
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
-
- H02J7/0027—
-
- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The present invention relates to the battery management system of lithium battery module, specifically a kind of lithium battery module acquisition system and method diagnosed with secondary failure with treatment mechanism.Including data acquisition unit, level one data processing unit and secondary data processing unit；Data acquisition unit includes voltage acquisition module, current acquisition module and temperature collect module；Level one data processing unit includes coagulation device MCU and communicates the real-time clock being connected and CAN with coagulation device MCU；Secondary data processing unit includes secondary processor CPU and communicates the communication interface being connected with secondary processor CPU.The present invention can stablize processing major accident rapidly and share processor load.
Description
Technical field
The present invention relates to the battery management system of lithium battery module, specifically a kind of band secondary failure is diagnosed and handled
The lithium battery module acquisition system and method for mechanism.
Background technology
Battery powered electronics are increasingly popularized in the application of modern society.The Rapid Expansion of handheld device and electronic vapour
The popularization of the similar applications such as car result in the demand more and more higher to battery technology.But battery also band while application extension
Corresponding safety problem is carried out, except considering safety factor, the reliability service of battery supply set in battery design, production
Battery management system is be unable to do without, it includes charge control, battery capacity monitoring, remaining runtime estimation, the balanced and life-span is estimated
The functions such as survey, and the premise of all these functions is the parameters for accurately gathering battery modules as far as possible, such as voltage, temperature
Deng.
Existing many battery management systems are using the structure being classified, i.e. control panel is structurally and functionally dividing with collection plate
Open, collection plate carries out differential voltage sampling using acquisition chip, and is uploaded to the host computer on control panel, control panel by bus
The work such as stored, handled, being diagnosed.The phenomenons such as the event such as thermal runaway due to being related to cell safety are often very fast when occurring
Speed, though the communication interference of short time or communicating interrupt be able to may also cause system to the responses of battery failures not in time, and then
Cause serious consequence.And simple that gathered data is uploaded into host computer, shortage time and fault message e insufficient to reflection electricity
Whole states of pond module, if the work such as parameter estimation, fault diagnosis, increase temporal information are all given at host computer
Reason, the load of host computer can be then aggravated when battery modules are larger.
The content of the invention
The present invention is intended to provide one kind, which can be stablized, handles rapidly major accident, the band secondary failure for sharing processor load is examined
The lithium battery module acquisition system and method for disconnected and treatment mechanism.
In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of subsidiary secondary failure diagnosis and place
The lithium battery module acquisition system of reason mechanism, including data acquisition unit, level one data processing unit and secondary data processing
Unit；The data acquisition unit includes being used to measure the voltage acquisition module of battery cell differential voltage, electricity in battery modules
Stream acquisition module and the temperature collect module for gathering same battery cell surface and internal two temperature；One series
Include coagulation device MCU according to processing unit and communicate the real-time clock and CAN communication mould that are connected with coagulation device MCU
Block, surface temperature and the correction data of internal temperature during the Battery pack failure that is stored with coagulation device MCU, for supplying one
Level processor MCU judges battery modules fault type according to the temperature information received；The secondary data processing unit includes
Secondary processor CPU and the communication interface being connected with secondary processor CPU communications；The input of the coagulation device MCU
It is connected respectively with the communication of voltage acquisition module, current acquisition module, temperature collect module and real-time clock, coagulation device
Interacted between MCU and CAN by I/O interfaces, an output pin in I/O interfaces on coagulation device MCU
Directly be connected with communication interface input end, the output end of CAN by fault message bus and collection bus with
The input of communication interface is connected.
It is preferred that, the voltage acquisition module, current acquisition module and temperature collect module pass through cable and setting respectively
It is connected in the external interface in battery modules with battery modules；Voltage acquisition module provides logical no less than the voltage acquisition on 12 tunnels
Road, current acquisition module provides the current acquisition passage no less than two-way, and temperature collect module provides the temperature no less than six tunnels
Acquisition channel.
It is preferred that, the voltage acquisition module includes first voltage acquisition chip and second voltage acquisition chip, the first electricity
Pressure acquisition chip and second voltage acquisition chip are high precision electro cell monitoring and protection chip, first voltage acquisition chip and the
Two voltage acquisition chips are directly connected to the monomer of connecting in battery modules by interface and are used to measure each monomer respectively
Differential voltage, wherein first voltage acquisition chip is used to measure high battery voltage, and second voltage acquisition chip is used to survey
Low-potential voltage is measured, between first voltage acquisition chip and second voltage acquisition chip and second voltage acquisition chip and one
It is respectively equipped with one group of bus between level processor MCU to interact, every group of bus includes data/address bus and status bus.
It is preferred that, the temperature collect module includes being used for the of measurement battery modules surface temperature respectively and internal temperature
One temperature sensor and second temperature sensor, the first temperature sensor are arranged on the shell of battery modules, and second temperature is passed
Sensor is arranged between two battery Soft Rolls in battery modules monomer.
It is preferred that, the current acquisition module is Hall current sensor.
It is preferred that, the coagulation device MCU is that can provide the vapour of serious and conventional lithium secondary battery fault diagnosis mechanism
Car 16 bit processors of level.
A kind of secondary failure diagnosis of lithium battery module and processing method, it is characterised in that：Comprise the following steps：
1）, system initialization；
2）, battery data completely gathered by voltage acquisition module, current acquisition module and temperature collect module；
3）, by coagulation device MCU judge whether battery internal and external temperature and battery internal-external temperature difference reach the first temperature threshold, such as
Fruit reaches the first temperature threshold, and coagulation device MCU is directly alarmed at two grades by an output pin in its I/O interface
Device CPU is managed, cut-out battery modules of existing side by side protect；If not up to the first temperature threshold, step 4 is carried out）；
4）, by coagulation device MCU judge whether battery internal and external temperature and battery internal-external temperature difference reach second temperature thresholding, such as
Fruit reaches second temperature thresholding, and high/low temperature diagnosis is carried out and by the fault message being diagnosed to be and by temperature by coagulation device MCU
The temperature information of acquisition module collection is transmitted to secondary processor CPU by CAN；If not up to second temperature door
Limit, carries out step 5）；
5）, by coagulation device MCU judge whether the voltage gathered by voltage acquisition module is less than the minimum of systemic presupposition
Voltage threshold or the ceiling voltage thresholding higher than systemic presupposition, if less than minimum voltage thresholding or higher than ceiling voltage thresholding,
Coagulation device MCU carries out overvoltage/undervoltage diagnosis and the information of voltage gathered by the fault message being diagnosed to be and by voltage acquisition module
Transmitted by CAN to secondary processor CPU；If the voltage gathered by voltage acquisition module is in minimum voltage door
Limit ceiling voltage thresholding between, then by and processor MCU will be adopted by temperature collect module, voltage acquisition module and electric current
Temperature information, information of voltage and the current information that collection module is gathered respectively are transferred at two grades by CAN respectively
Manage CPU；6）, step 2）To step 5）Repetitive cycling.
It is preferred that, the threshold value of the first temperature sensor measured temperature of correspondence is 75-85 DEG C in first temperature threshold,
The threshold value of correspondence second temperature sensor measured temperature is 105-115 DEG C, and the first temperature sensor of correspondence and second temperature are passed
The threshold value of sensor institute thermometric difference is 30-35 DEG C.
It is preferred that, the threshold value of the first temperature sensor measured temperature of correspondence is 65-75 DEG C in the second temperature thresholding,
The threshold value of correspondence second temperature sensor measured temperature is 80-90 DEG C, the first temperature sensor of correspondence and second temperature sensing
The threshold value of device institute thermometric difference is 20-25 DEG C.
Beneficial effect
The acquisition system of the present invention adds coagulation device MCU in addition to carrying out conventional battery external characteristics data acquisition,
Coagulation device MCU analysis collection information implements monitoring and fault diagnosis functions, and electricity is judged by the initial analysis of gathered data
The state of pond group, the supplemental characteristic of subsidiary failure diagnosis information is placed on data/address bus and is transferred to secondary processor CPU.One-level
Processor MCU also in case of emergency can voluntarily handle more serious battery failures in itself, and bypass communication bus it is direct on
Report secondary processor CPU.Such acquisition system has certain autonomic function, effectively alleviates the processing pressure of superior processor
Power, precision is high, and response is fast, with good reliability and autgmentability, it is adaptable to the extensive electricity such as electric automobile and energy-accumulating power station
Pond module.There is advantages below compared with prior art.
1) data acquisition unit is a large amount of to reduce the negative of upper secondary processor CPU per se with fault diagnosis and temporal information
Lotus, while easy-to-look-up historical failure information；
2) occur the warning message after catastrophe failure and come from acquisition system, by individual transmission independent of CAN communication mould
Block, accelerates failure response time, it is ensured that reliability of battery system；
3) temperature collect module gathers battery temperature surface and internal temperature respectively, and regard internal-external temperature difference as fault diagnosis
One of according to；
4) battery modules second class protection is provided.By diagnosis, when the failure for occurring not influenceing system safety in battery modules,
Failure situation is recorded and uploaded through CAN without processing by system；When diagnosis battery modules catastrophe failure occur simultaneously
Jeopardize battery modules and when system is applied, protected in time and skip CAN warning message is directly passed to two
Level processor CPU.
Brief description of the drawings
Fig. 1 is structural framing schematic diagram of the invention；
Fig. 2 illustrates for the setting of first voltage acquisition chip and second voltage acquisition chip in the voltage acquisition module of the present invention
Figure；
Fig. 3 is the first temperature sensor and the setting schematic diagram of second temperature sensor in the temperature collect module of the present invention；
The curve map of first temperature sensor and second temperature sensor measured temperature when Fig. 4 is lithium battery module failure；
Secondary failure diagnosis and the flow chart that handles of the Fig. 5 for the present invention；
Marked in figure：1st, shell, 2, battery Soft Roll, the 3, first temperature sensor, 4, second temperature sensor, 5, battery case lid
Plate, 6, battery pole ear.
Embodiment
As shown in Figures 1 to 5, a kind of lithium battery module collection system diagnosed with secondary failure with treatment mechanism of the invention
System, including data acquisition unit, level one data processing unit and secondary data processing unit.Data acquisition unit includes voltage
Acquisition module, current acquisition module and temperature collect module；Level one data processing unit include coagulation device MCU and with
The real-time clock and CAN of coagulation device MCU communication connections；Secondary data processing unit includes secondary processor
CPU and the communication interface being connected with secondary processor CPU communications.
Coagulation device MCU input respectively with voltage acquisition module, current acquisition module, temperature collect module and
Real-time clock communication connection, is interacted, coagulation device between coagulation device MCU and CAN by I/O interfaces
An output pin is directly connected with communication interface input end in the upper I/O interfaces of MCU, and the output end of CAN passes through event
Barrier bus and collection bus are connected with the input of communication interface.Voltage acquisition module, current acquisition module and temperature
Degree acquisition module is connected by cable and the external interface being arranged in battery modules with battery modules respectively；Voltage acquisition module
The voltage acquisition passage no less than 12 tunnels is provided, current acquisition module provides the current acquisition passage no less than two-way, temperature
Acquisition module provides the temperature acquisition passage no less than six tunnels.
Voltage acquisition module includes first voltage acquisition chip and second voltage acquisition chip, can be by cascading extension measurement
Number of batteries, and over-pressed, under-voltage, excessively gentle low-temperature protection mechanism is provided.First voltage acquisition chip and second voltage collection core
Piece is high precision electro cell monitoring and protection chip, and the measurable 3-6 economize on electricity cell voltages of the chip simultaneously can carry out balanced, chip between level
It can cascade and further expand number of batteries.First voltage acquisition chip and second voltage acquisition chip pass through interface and battery respectively
Series connection monomer in module is directly connected to and is used for the differential voltage for measuring each monomer, and wherein first voltage acquisition chip is used
In measurement high battery voltage, second voltage acquisition chip is used to measure low-potential voltage, in first voltage acquisition chip and
One group of bus is respectively equipped between second voltage acquisition chip and between second voltage acquisition chip and coagulation device MCU to enter
Row interaction, every group of bus includes data/address bus and status bus.Data/address bus completes first voltage by SPI interface and gathers core
All measurement data are simultaneously uploaded to coagulation device MCU by data interaction between piece and second voltage acquisition chip；Status bus
For shape between first voltage acquisition chip and second voltage acquisition chip and between second voltage acquisition chip and coagulation device MCU
The interaction of state, including the synchronous conversion signal sent by coagulation device MCU, and first voltage acquisition chip and second voltage
Ready for data signal, alarm signal and the fault-signal of acquisition chip.Here fault-signal puts two kinds for overcharging and crossing
Situation, can diagnose and provide corresponding alarm signal；And can overcharge and cross and put door according to battery and the flexible setting of application type
Limit and failure corresponding time.
Temperature collect module includes being used for the first TEMP of measurement battery modules surface temperature and internal temperature respectively
Device 3 and second temperature sensor 4, and it regard inside and outside temperature and internal-external temperature difference rate of change as one of foundation of fault diagnosis.Two
Individual sensor is thermometric chip 18B20, and such bus-type temperature measuring mechanism is most in the case where main control MCU interface is limited
May more than progresss battery cell monitoring temperature and facilitate thermometric points expansion.First temperature sensor 3 and second temperature are passed
Sensor 4 is all disposed within close to the of a relatively high position of battery temperature of battery pole ear 6, carries out battery cell monitoring temperature and convenient survey
The expansion of warm spot number, the first temperature sensor 3 is arranged on the shell 1 of battery modules, and second temperature sensor 4 is arranged on battery
Between two battery Soft Rolls 2 in module in battery cell.As shown in figure 4, when the present invention gives a Battery pack failure simultaneously
The correction data of surface temperature and internal temperature, battery internal-external temperature difference keeps relative stability under normal circumstances, once battery goes out
Existing abnormal conditions, both difference will be widened gradually, and be likely to result in thermal runaway；When battery surface temperature is at 60 DEG C or so
When, internal temperature of battery has been reached than relatively hazardous 120 DEG C, and has further up general in 130- to battery diaphragm fusing point
140 DEG C of trend；When having a bit of temperature jump in 4250s or so temperature, the change of battery status can be implied, but the step
It is neutralised in external temperature data due to heat transfer process.Therefore this patent uses battery cell internal and external temperature and its temperature
Difference, which becomes, is turned to one of foundation of fault diagnosis.
Current acquisition module is Hall current sensor, easy for installation, fast response time, strong antijamming capability, it is adaptable to
Industry spot, and be transformed to by sampling resistor to pass to coagulation device MCU after voltage data.
Coagulation device MCU is that can provide 16 processing of automotive grade of serious and conventional lithium secondary battery fault diagnosis mechanism
Device.Coagulation device MCU receives the measurement data from data acquisition unit and the real time clock data of real-time clock；At one-level
Reason device MCU is arranged to gathered data, is filed, analyzed and uploaded, and according to the failure of internal-external temperature difference and voltage acquisition module
Signal, fault type and the order of severity and then progress respective handling that diagnosis battery modules occur；
In the event of conventional fault, more serious consequence, coagulation device MCU will not be brought to record failure after judging to battery modules
Type, and fault message is sent into CAN together with gathered data, give secondary processor CPU processing.
It if being diagnosed to be generation catastrophe failure, will directly be handled by the coagulation device MCU of acquisition system, perform battery pack
Protection mechanism, and alarm signal is skipped into CAN, communication interface is placed directly within for secondary processor CPU processing；
The type of fault diagnosis includes overcharging, cross put, high temperature, low temperature and excessively stream, and set two according to the order of severity of failure
Temperature threshold, matching convention failure and catastrophe failure；
If detecting that catastrophe failure occurs for battery modules, security incident may be triggered, it will send alarm signal, the signal is not
Communication interface, such communication interference for being configured to prevent the short time or communicating interrupt are placed directly within by CAN
Make battery management system that battery modules are lost with monitoring, improve battery management system to the response speed of failure and whole system
Stability.
A kind of secondary failure diagnosis of lithium battery module of the present invention and processing method are based on a kind of above-mentioned band secondary failure
Diagnosis and the lithium battery module acquisition system for the treatment of mechanism, comprise the following steps：
1）, system initialization；
2）, battery data completely gathered by voltage acquisition module, current acquisition module and temperature collect module；
3）, by coagulation device MCU judge whether battery internal and external temperature and battery internal-external temperature difference reach the first temperature threshold,
The threshold value of the first temperature sensor measured temperature of correspondence is 75-85 DEG C in one temperature threshold, correspondence second temperature sensor institute
The threshold value of testing temperature is 105-115 DEG C, the threshold value of the first temperature sensor of correspondence and second temperature sensor institute thermometric difference
For 30-35 DEG C.If reaching the first temperature threshold, coagulation device MCU is direct by an output pin in its I/O interface
Alarm is to secondary processor CPU, and cut-out battery modules of existing side by side protect；If not up to the first temperature threshold, is walked
Rapid 4）；
4）, by coagulation device MCU judge whether battery internal and external temperature and battery internal-external temperature difference reach second temperature thresholding,
The threshold value of the first temperature sensor measured temperature of correspondence is 65-75 DEG C in two temperature thresholds, correspondence second temperature sensor institute
The threshold value of testing temperature is 80-90 DEG C, and the threshold value of the first temperature sensor of correspondence and second temperature sensor institute thermometric difference is
20-25℃.If reaching second temperature thresholding, high/low temperature diagnosis is carried out by coagulation device MCU and the failure being diagnosed to be is believed
Breath and the temperature information gathered by temperature collect module are transmitted to secondary processor CPU by CAN；If not up to
Second temperature thresholding, carries out step 5）；
5）, by coagulation device MCU judge whether the voltage gathered by voltage acquisition module is less than the minimum of systemic presupposition
Voltage threshold or the ceiling voltage thresholding higher than systemic presupposition, if less than minimum voltage thresholding or higher than ceiling voltage thresholding,
Coagulation device MCU carries out overvoltage/undervoltage diagnosis and the information of voltage gathered by the fault message being diagnosed to be and by voltage acquisition module
Transmitted by CAN to secondary processor CPU；If the voltage gathered by voltage acquisition module is in minimum voltage door
Limit ceiling voltage thresholding between, then by and processor MCU will be adopted by temperature collect module, voltage acquisition module and electric current
Temperature information, information of voltage and the current information that collection module is gathered respectively are transferred at two grades by CAN respectively
Manage CPU；
6）, step 2）To step 5）Repetitive cycling.
Claims (9)
1. a kind of subsidiary secondary failure diagnosis and the lithium battery module acquisition system for the treatment of mechanism, it is characterised in that：Including data
Collecting unit, level one data processing unit and secondary data processing unit；The data acquisition unit includes being used to measure electricity
The voltage acquisition module of battery cell differential voltage, current acquisition module and for gathering same battery cell table in the module of pond
Face and the temperature collect module of internal two temperature；The level one data processing unit includes coagulation device MCU and with one
The real-time clock and CAN of level processor MCU communication connections, be stored with Battery pack event in coagulation device MCU
Surface temperature and the correction data of internal temperature during barrier, for being judged for coagulation device MCU according to the temperature information received
Battery modules fault type；The secondary data processing unit includes secondary processor CPU and communicated with secondary processor CPU
The communication interface of connection；The input of the coagulation device MCU respectively with voltage acquisition module, current acquisition module, temperature
Acquisition module and real-time clock communication connection, are handed between coagulation device MCU and CAN by I/O interfaces
Mutually, an output pin is directly connected with communication interface input end in I/O interfaces on coagulation device MCU, CAN
Output end is connected by fault message bus and collection bus with the input of communication interface.
2. a kind of subsidiary secondary failure diagnosis according to claim 1 and the lithium battery module acquisition system for the treatment of mechanism,
It is characterized in that：The voltage acquisition module, current acquisition module and temperature collect module by cable and are arranged at electricity respectively
External interface on the module of pond is connected with battery modules；Voltage acquisition module provides the voltage acquisition passage no less than 12 tunnels,
Current acquisition module provides the current acquisition passage no less than two-way, and temperature collect module provides the temperature acquisition no less than six tunnels
Passage.
3. a kind of subsidiary secondary failure diagnosis according to claim 2 and the lithium battery module acquisition system for the treatment of mechanism,
It is characterized in that：The voltage acquisition module includes first voltage acquisition chip and second voltage acquisition chip, and first voltage is adopted
Collection chip and second voltage acquisition chip are high precision electro cell monitoring and protect chip, first voltage acquisition chip and the second electricity
Pressure acquisition chip is directly connected to and is used for respectively the difference for measuring each monomer by interface and the monomer of connecting in battery modules
Component voltage, wherein first voltage acquisition chip are used to measure high battery voltage, and second voltage acquisition chip is used to measure low
Potential voltage, between first voltage acquisition chip and second voltage acquisition chip and at second voltage acquisition chip and one-level
One group of bus is respectively equipped between reason device MCU to interact, every group of bus includes data/address bus and status bus.
4. a kind of subsidiary secondary failure diagnosis according to claim 2 and the lithium battery module acquisition system for the treatment of mechanism,
It is characterized in that：The temperature collect module includes being used for measurement battery modules surface temperature respectively and the first temperature of internal temperature
Sensor and second temperature sensor are spent, the first temperature sensor is arranged on the shell of battery modules, second temperature sensor
It is arranged between two battery Soft Rolls in battery modules monomer.
5. a kind of subsidiary secondary failure diagnosis according to claim 2 and the lithium battery module acquisition system for the treatment of mechanism,
It is characterized in that：The current acquisition module is Hall current sensor.
6. a kind of subsidiary secondary failure diagnosis according to claim 1 and the lithium battery module acquisition system for the treatment of mechanism,
It is characterized in that：The coagulation device MCU is that can provide the automotive grade of serious and conventional lithium secondary battery fault diagnosis mechanism
16 bit processors.
7. a kind of secondary failure diagnosis of lithium battery module and processing method, it is characterised in that：Comprise the following steps：
1）, system initialization；
2）, battery data completely gathered by voltage acquisition module, current acquisition module and temperature collect module；
3）, by coagulation device MCU judge whether battery internal and external temperature and battery internal-external temperature difference reach the first temperature threshold, such as
Fruit reaches the first temperature threshold, and coagulation device MCU is directly alarmed at two grades by an output pin in its I/O interface
Device CPU is managed, cut-out battery modules of existing side by side protect；If not up to the first temperature threshold, step 4 is carried out）；
4）, by coagulation device MCU judge whether battery internal and external temperature and battery internal-external temperature difference reach second temperature thresholding, such as
Fruit reaches second temperature thresholding, and high/low temperature diagnosis is carried out and by the fault message being diagnosed to be and by temperature by coagulation device MCU
The temperature information of acquisition module collection is transmitted to secondary processor CPU by CAN；If not up to second temperature door
Limit, carries out step 5）；
5）, by coagulation device MCU judge whether the voltage gathered by voltage acquisition module is less than the minimum of systemic presupposition
Voltage threshold or the ceiling voltage thresholding higher than systemic presupposition, if less than minimum voltage thresholding or higher than ceiling voltage thresholding,
Coagulation device MCU carries out overvoltage/undervoltage diagnosis and the information of voltage gathered by the fault message being diagnosed to be and by voltage acquisition module
Transmitted by CAN to secondary processor CPU；If the voltage gathered by voltage acquisition module is in minimum voltage door
Limit ceiling voltage thresholding between, then by and processor MCU will be adopted by temperature collect module, voltage acquisition module and electric current
Temperature information, information of voltage and the current information that collection module is gathered respectively are transferred at two grades by CAN respectively
Manage CPU；
6）, step 2）To step 5）Repetitive cycling.
8. a kind of secondary failure diagnosis of lithium battery module according to claim 8 and processing method, it is characterised in that：Institute
The threshold value for stating the first temperature sensor measured temperature of correspondence in the first temperature threshold is 75-85 DEG C, correspondence second temperature sensing
The threshold value of device measured temperature is 105-115 DEG C, the door of the first temperature sensor of correspondence and second temperature sensor institute thermometric difference
Limit value is 30-35 DEG C.
9. a kind of secondary failure diagnosis of lithium battery module according to claim 8 and processing method, it is characterised in that：Institute
The threshold value for stating the first temperature sensor measured temperature of correspondence in second temperature thresholding is 65-75 DEG C, correspondence second temperature sensing
The threshold value of device measured temperature is 80-90 DEG C, the thresholding of the first temperature sensor of correspondence and second temperature sensor institute thermometric difference
It is worth for 20-25 DEG C.
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