CN106080251A - There is the electric automobile power battery management system of complete fault self-diagnosis function - Google Patents

There is the electric automobile power battery management system of complete fault self-diagnosis function Download PDF

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Publication number
CN106080251A
CN106080251A CN201610637842.7A CN201610637842A CN106080251A CN 106080251 A CN106080251 A CN 106080251A CN 201610637842 A CN201610637842 A CN 201610637842A CN 106080251 A CN106080251 A CN 106080251A
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fault
management system
battery management
diagnosis
battery
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CN201610637842.7A
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CN106080251B (en
Inventor
胡社教
姚志
傅万春
丁更新
庞艳红
沙伟
罗盛
魏星刚
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Hefei Jingchuang Yika New Energy Vehicle Technology Co.,Ltd.
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Hefei University of Technology
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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
    • 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
    • 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)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Secondary Cells (AREA)

Abstract

The invention discloses a kind of electric automobile power battery management system with complete fault self-diagnosis function, it is characterized in that: monomer information gathering and fault diagnosis module are set in battery management system, utilize monomer information gathering and fault diagnosis module to obtain battery in battery pack monomer voltage and battery bag temperature data, and diagnose each trouble point acquisition fault self-diagnosis information being likely to occur fault；By isolation and interface modular converter, battery cell voltage, battery bag temperature data and fault self-diagnosis information are sent to master controller MCU in battery management system as output signal, and in battery management system, master controller MCU receives output signal and is sent to entire car controller.The present invention can effectively promote the ASIL of electric automobile power battery management system.

Description

There is the electric automobile power battery management system of complete fault self-diagnosis function
Technical field
The present invention relates to electric automobile power battery management system, particularly there is the battery of complete fault self-diagnosis function Management system.
Background technology
At present, although electric automobile power battery management system can realize monomer voltage collection, temperature acquisition and equilibrium Etc. each function, but in fault diagnosis, enhanced feature safe class aspect research is short of.About lithium ion battery and management system thereof System fault diagnosis research in, be substantially the diagnosis for battery system and study, including stream, excess temperature, overvoltage, owe Pressure and Insulation monitoring etc., but battery management system itself is the most comprehensively diagnosed.
In electric automobile running, battery management system there are the probability various faults occur, including: ADC Fault, reference voltage fault, monomer voltage gathering line open circuit, short circuit, equalize pin open, short circuit, order wire open circuit, short circuit Deng.The appearance of arbitrary fault is likely to cause whole system operation exception.Meanwhile, in order to realize electronics and electricity on automobile The functional safety design of gas system, road vehicle Functional Safety Standard ISO 26262 formally issued in 2011, for exploitation vapour Car safety-related systems provides guide.Standard gives automotive safety integrity level ASIL.In order to reach the highest safety etc. Level ASIL-D, battery management system is necessary for having complete fault self-diagnosis function, but, there are not the public affairs of correlation technique so far Open report.
Summary of the invention
The present invention is for avoiding the weak point existing for above-mentioned prior art, it is provided that one has complete fault self-diagnosis The electric automobile power battery management system of function, ensures that automotive safety runs.
The present invention solves that technical problem adopts the following technical scheme that
The present invention has being structurally characterized in that of the electric automobile power battery management system of complete fault self-diagnosis function: Described battery management system arranges monomer information gathering and fault diagnosis module, utilizes described monomer information gathering and fault to examine Disconnected module obtains battery in battery pack monomer voltage and battery bag temperature data, and diagnoses and be likely to occur each trouble point of fault and obtain Obtain fault self-diagnosis information；Using described battery cell voltage, battery bag temperature data and fault self-diagnosis information as output Signal is sent to master controller MCU in battery management system, in described battery management system by isolation and interface modular converter Master controller MCU receives described output signal and is sent to entire car controller.
The construction features of the electric automobile power battery management system that the present invention has complete fault self-diagnosis function also exists In: magnetic coupling isolation circuit is set between described monomer information gathering and fault diagnosis module and master controller MCU, utilizes interface The difference UART interface of magnetic coupling isolation circuit is converted into SPI interface by change-over circuit, and master controller MCU passes through with entire car controller CAN communicates.
The construction features of the electric automobile power battery management system that the present invention has complete fault self-diagnosis function also exists In: in described battery management system, master controller MCU marks according to SAE J1939-21-2006 with the communication protocol of entire car controller Standard is formulated.
The construction features of the electric automobile power battery management system that the present invention has complete fault self-diagnosis function also exists In: described fault self-diagnosis information includes that monomer voltage measures pin open failure diagnosis information, monomer voltage measures line open circuit Failure diagnosis information, equilibrium pin short trouble diagnostic message, equilibrium pin open fault message, monomer voltage measure pin with Equilibrium pin short trouble diagnostic message, and communication failure diagnostic message, power failure diagnosing information, crystal oscillator fault diagnosis letter Breath, reference voltage failure diagnosis information and ADC failure diagnosis information.
The construction features of the electric automobile power battery management system that the present invention has complete fault self-diagnosis function also exists In: it is to obtain as follows that described monomer voltage measures pin open failure diagnosis information:
Use MAX17823 chip, utilize the internal current source of described MAX17823 chip to test, described The monomer voltage of MAX17823 chip measures pin for end foot a and end foot b, end foot a and end foot b are arranged outer meeting resistance R1, R3 and external capacitor C1, C3；Low pass filter, resistance R1 is respectively constituted by resistance R1 and electric capacity C1 and resistance R2 and electric capacity C2 Connecing the positive terminal of tested battery E, resistance R2 connects the negative pole end of tested battery；
Utilize MAX17823 chip to record terminal voltage E1 of the tested battery when being not loaded with current source respectively, and load Terminal voltage E2 of tested battery during current source；If the difference of E1 and E2 reaches the threshold value set, it is judged that for there are monomer electricity Pressure measures pin open fault；Otherwise, then it is judged as that not there are monomer voltage measures pin open fault.
Compared with the prior art, the present invention has the beneficial effect that:
The present invention while achieving the conventional batteries management basic function such as the collection of system monomer voltage, temperature acquisition, Possess complete self-diagnostic function, carry out real-time diagnosis by the trouble point that management system is likely to occur itself, be greatly promoted Safe class ASIL of electric automobile power battery management system.
Accompanying drawing explanation
Fig. 1 is functional structure chart of the present invention；
Fig. 2 is that monomer voltage of the present invention measures pin open fault diagnosis principle figure；
Detailed description of the invention
Seeing Fig. 1, the electric automobile power battery management system in the present embodiment with complete fault self-diagnosis function is Monomer information gathering and fault diagnosis module are set in battery management system, utilize each monomer information gathering and fault diagnosis mould Block obtains battery in battery pack monomer voltage and battery bag temperature data, and diagnoses each trouble point acquisition event being likely to occur fault Barrier self-diagnosis information；Battery cell voltage, battery bag temperature data and fault self-diagnosis information are passed through as output signal Isolation and interface modular converter are sent to master controller MCU in battery management system, and in battery management system, master controller MCU connects Receive output signal and be sent to entire car controller.
As it is shown in figure 1, the present embodiment is arranged between monomer information gathering and fault diagnosis module and master controller MCU Magnetic coupling isolation circuit, utilizes interface conversion circuit that difference UART of magnetic coupling isolation circuit is converted into SPI interface, master controller MCU is communicated by CAN with entire car controller.
In the present embodiment, in battery management system, master controller MCU and the communication protocol of entire car controller are according to U.S.'s vapour The SAE J1939-21-2006 standard that car engineering association is recommended is formulated；Fault self-diagnosis information includes that monomer voltage is measured Pin open failure diagnosis information, monomer voltage measure line open fault diagnostic message, equilibrium pin short trouble diagnostic message, Equilibrium pin open fault message, monomer voltage measure pin and Jun Heng pin short trouble diagnostic message, and communication failure Diagnostic message, power failure diagnosing information, crystal oscillator failure diagnosis information, reference voltage failure diagnosis information, ADC fault diagnosis is believed Breath.
In being embodied as, monomer information gathering is made up of multi-disc MAX17823 with fault diagnosis module, as shown in fig. 1 Acquisition chip 1, acquisition chip 2 ... acquisition chip n-1 and acquisition chip n, every MAX17823 can gather 12 road monomers electricity Pressure, accessory channel can gather two-way temperature data.Difference UART of chip MAX17823 is converted into SPI and connects by interface modular converter Mouthful, it is simple to communicate with master controller MCU.
In battery management system, master controller MCU and the communication protocol of entire car controller are according to SAE J1939-21-2006 Standard is formulated, and table 1 show module's address and distributes:
Table 1 module's address distributes
Module Address
BMS 0x5E
Entire car controller 0x8D
The transmission of fault self-diagnosis information sends with the form of packet, arranges transformat as shown in table 2:
Table 2
In table 2, " zz zz zz " is packet number, "？？？？？？" it is parameter group numbering PGN, the present embodiment is transmitted Packet be fault self-diagnosis information, therefore, it can directly parameter group numbering PGN is set to fixed form, such as: " 00 00 00 ", " yy " is undefined reserve bytes, and " xx " is transmission data.
For Data Transmission Content shown in table 2, in multiframe transmission, the first character joint in data field represents frame number, such as " 01 " characterizes frame number is " 01 "；Second byte is sequence number N of acquisition chip, if sequence number N of acquisition chip is zero, i.e. and N=0, Represent fault-free.
Table 3 show the definition of byte 3:
Table 3
Byte 3 Fault Byte 3 Fault
01 V<sub>AA</sub>Under-voltage 18 Equalizer switch short circuit
02 V<sub>HV</sub>Under-voltage 19 Equalizer switch is opened a way
03 V<sub>HV</sub>Overvoltage 20 Odd number measures line open circuit
04 V<sub>HV</sub>Low headroom 21 Even number measures line open circuit
05 32kHz crystal oscillator fault 22 SHDNL permanent High level
06 16kHz crystal oscillator fault 23 HVMUX switch open
07 Communication failure 24 HVMUX switch short
08 RX pin open/short circuit 25 HVMUX tests current source
09 VDDLx pin open/short circuit 26 Measure pin open
10 GNDLx pin open/short circuit 27 Measure pin and the short circuit of Jun Heng pin
11 Excess temperature fault 28 Measure pin leakage current
12 Reference voltage fault 29 Voltage comparator fault
13 V<sub>AA</sub>Voltage failure 30 ALRTHVUV comparator
14 LSAMP shift fault 31 HVMUX sequencer
15 ADC completely exports 32 ALU data channel
16 ADC zero output 33 AUXINn pin open
17 V<sub>PTAT</sub>Or ALRTTEMP fault 34 Calibration fault
In byte 3, each sequence number includes with the corresponding relation of fault:
" the measurement pin open " of sequence number 26 corresponds to monomer voltage and measures pin open fault；
" odd number measures line open circuit " of sequence number 20 and " even number measures line open circuit " fault of sequence number 21 correspond to " monomer voltage Measure line open fault "；
" the equalizer switch short circuit " of sequence number 18 corresponds to " equilibrium pin short trouble "；
" the equalizer switch open circuit " of sequence number 19 corresponds to " equilibrium pin open fault "；
" measuring pin and the short circuit of Jun Heng pin " of sequence number 27 corresponds to " monomer voltage measurement pin and equilibrium pin short circuit Fault "；
" communication failure " of sequence number 07 corresponds to " communication failure "；
" the V of sequence number 02HVUnder-voltage " and " V of sequence number 3HVOvervoltage " correspond to " power failure "；
" the 32kHz crystal oscillator fault " of sequence number 05 and " the 16kHz crystal oscillator fault " of sequence number 6 correspond to " crystal oscillator fault "；
" the reference voltage fault " of sequence number 12 corresponds to " reference voltage fault "；
" ADC completely exports " of sequence number 15 and " ADC zero output " fault of sequence number 16 correspond to " ADC fault ".
The byte 3 that table 3 lists is as shown in table 4 with the corresponding relation of other byte:
Table 4
When battery management system self diagnosis does not has fault, master controller only sends frame data, and N=0, such as table 5 institute Show；
Table 5
Frame ID Data
1CEB5E8D 01 00FF FF FF FF FF FF
When occurring at faulty, a trouble point sends frame data.
Upper 3rd of such as first MAX17823 measures line open circuit, and the 3rd second equalizer switch short circuit, then Transmit two frame data as shown in table 6:
Table 6
Frame ID Data
1CEB5E8D 01 01 12 03FF FF FF FF
1CEB5E8D 02 03 14 02FF FF FF FF
In the present embodiment, monomer voltage measures pin open failure diagnosis information is to obtain as follows:
Use MAX17823 chip, utilize the internal current source of described MAX17823 chip to test, described The monomer voltage of MAX17823 chip measures pin for end foot a and end foot b, end foot a and end foot b are arranged outer meeting resistance R1, R3 and external capacitor C1, C3；Low pass filter, resistance R1 is respectively constituted by resistance R1 and electric capacity C1 and resistance R2 and electric capacity C2 Connecing the positive terminal of tested battery E, resistance R2 connects the negative pole end of tested battery；
Utilize MAX17823 chip to record terminal voltage E1 of the tested battery when being not loaded with current source respectively, and load Terminal voltage E2 of tested battery during current source；If the difference of E1 and E2 reaches the threshold value set, it is judged that for there are monomer electricity Pressure measures pin open fault；Otherwise, then it is judged as that not there are monomer voltage measures pin open fault.According to MAX17823 The data book of chip determines that threshold value is 100mV.

Claims (5)

1. there is an electric automobile power battery management system for complete fault self-diagnosis function, it is characterized in that: at described electricity Management system in pond arranges monomer information gathering and fault diagnosis module, utilizes described monomer information gathering and fault diagnosis module Obtain battery in battery pack monomer voltage and battery bag temperature data, and diagnose each trouble point acquisition fault being likely to occur fault Self-diagnosis information；Described battery cell voltage, battery bag temperature data and fault self-diagnosis information are led to as output signal Cross isolation and be sent to master controller MCU in battery management system, main control in described battery management system with interface modular converter Device MCU receives described output signal and is sent to entire car controller.
The electric automobile power battery management system with complete fault self-diagnosis function the most according to claim 1, its Feature is: arranges magnetic coupling isolation circuit between described monomer information gathering and fault diagnosis module and master controller MCU, utilizes The difference UART interface of magnetic coupling isolation circuit is converted into SPI interface, master controller MCU and entire car controller by interface conversion circuit Communicated by CAN.
The electric automobile power battery management system with complete fault self-diagnosis function the most according to claim 1, its Feature is: in described battery management system, master controller MCU and the communication protocol of entire car controller are according to SAE J1939-21- 2006 standards are formulated.
The electric automobile power battery management system with complete fault self-diagnosis function the most according to claim 1, its Feature is: described fault self-diagnosis information includes that monomer voltage measures pin open failure diagnosis information, monomer voltage measures line Open fault diagnostic message, equilibrium pin short trouble diagnostic message, equilibrium pin open fault message, monomer voltage measurement are drawn Foot and Jun Heng pin short trouble diagnostic message, and communication failure diagnostic message, power failure diagnosing information, crystal oscillator fault examine Disconnected information, reference voltage failure diagnosis information and ADC failure diagnosis information.
The electric automobile power battery management system with complete fault self-diagnosis function the most according to claim 4, its Feature be described monomer voltage measure pin open failure diagnosis information be as follows obtain:
Use MAX17823 chip, utilize the internal current source of described MAX17823 chip to test, described MAX17823 core The monomer voltage of sheet is measured pin and for end foot a and is held foot b, arranges outer meeting resistance R1, R3 and external electricity on end foot a and end foot b Hold C1, C3；Being respectively constituted low pass filter by resistance R1 and electric capacity C1 and resistance R2 and electric capacity C2, resistance R1 connects tested battery The positive terminal of E, resistance R2 connects the negative pole end of tested battery；
MAX17823 chip is utilized to record terminal voltage E1 of the tested battery when being not loaded with current source, and loading current respectively Terminal voltage E2 of tested battery during source；If the difference of E1 and E2 reaches the threshold value set, it is judged that survey for there are monomer voltage Amount pin open fault；Otherwise, then it is judged as that not there are monomer voltage measures pin open fault.
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CN107234981A (en) * 2017-07-26 2017-10-10 洛阳理工学院 The lithium battery module acquisition system and method with treatment mechanism are diagnosed with secondary failure
CN108366128A (en) * 2018-03-07 2018-08-03 温州伊诺韦特科技有限公司 A kind of self diagnosis smog sensor-based system
CN108674214A (en) * 2018-04-10 2018-10-19 广州电力机车有限公司 A kind of low-floor tramcar vehicle-mounted power management system
CN109066838A (en) * 2018-07-25 2018-12-21 南京特亿达新能源科技有限公司 A kind of power battery managing and control system
CN109130885A (en) * 2018-09-11 2019-01-04 深圳市大地和电气股份有限公司 A kind of System and method for reducing electric vehicle motor controller ASIL grade
CN110324382A (en) * 2018-03-30 2019-10-11 比亚迪股份有限公司 Electric car and its data processing system and data processing method
CN110324383A (en) * 2018-03-30 2019-10-11 比亚迪股份有限公司 Cloud Server, electric car and the wherein management system, method of power battery
CN110501597A (en) * 2019-09-03 2019-11-26 广州小鹏汽车科技有限公司 Electric car and the detection circuit for BMS, method and system
CN110867596A (en) * 2019-10-25 2020-03-06 芜湖宏景电子股份有限公司 Hydrogen fuel cell inspection measurement system
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Publication number Priority date Publication date Assignee Title
CN107234981A (en) * 2017-07-26 2017-10-10 洛阳理工学院 The lithium battery module acquisition system and method with treatment mechanism are diagnosed with secondary failure
CN107234981B (en) * 2017-07-26 2023-04-07 洛阳理工学院 Lithium battery module collection system and method with secondary fault diagnosis and processing mechanism
CN108366128A (en) * 2018-03-07 2018-08-03 温州伊诺韦特科技有限公司 A kind of self diagnosis smog sensor-based system
CN110324383B (en) * 2018-03-30 2021-09-03 比亚迪股份有限公司 Cloud server, electric automobile and management system and method of power battery in electric automobile
CN110324382A (en) * 2018-03-30 2019-10-11 比亚迪股份有限公司 Electric car and its data processing system and data processing method
CN110324383A (en) * 2018-03-30 2019-10-11 比亚迪股份有限公司 Cloud Server, electric car and the wherein management system, method of power battery
CN108674214A (en) * 2018-04-10 2018-10-19 广州电力机车有限公司 A kind of low-floor tramcar vehicle-mounted power management system
CN108674214B (en) * 2018-04-10 2022-04-05 广州电力机车有限公司 Low-floor tramcar vehicle-mounted power management system
CN109066838A (en) * 2018-07-25 2018-12-21 南京特亿达新能源科技有限公司 A kind of power battery managing and control system
CN109130885A (en) * 2018-09-11 2019-01-04 深圳市大地和电气股份有限公司 A kind of System and method for reducing electric vehicle motor controller ASIL grade
CN109130885B (en) * 2018-09-11 2023-06-09 深圳市大地和电气股份有限公司 System and method for reducing ASIL (automatic service interface il) level of electric vehicle motor controller
CN110501597A (en) * 2019-09-03 2019-11-26 广州小鹏汽车科技有限公司 Electric car and the detection circuit for BMS, method and system
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