CN105356535B - A kind of battery management system total voltage processing method based on functional safety - Google Patents
A kind of battery management system total voltage processing method based on functional safety Download PDFInfo
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- CN105356535B CN105356535B CN201510765043.3A CN201510765043A CN105356535B CN 105356535 B CN105356535 B CN 105356535B CN 201510765043 A CN201510765043 A CN 201510765043A CN 105356535 B CN105356535 B CN 105356535B
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- 238000003672 processing method Methods 0.000 title claims abstract description 12
- 239000000178 monomer Substances 0.000 claims abstract description 125
- 238000003860 storage Methods 0.000 claims abstract description 38
- 230000005611 electricity Effects 0.000 claims abstract description 34
- 230000002159 abnormal effect Effects 0.000 claims abstract description 4
- 238000012546 transfer Methods 0.000 claims abstract description 3
- 238000012545 processing Methods 0.000 claims description 20
- 238000005070 sampling Methods 0.000 claims description 8
- 238000009825 accumulation Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims 1
- 230000006870 function Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000003745 diagnosis Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
Classifications
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/387—Determining ampere-hour charge capacity or SoC
- G01R31/388—Determining ampere-hour charge capacity or SoC involving voltage measurements
-
- 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
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
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- H02J7/0021—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a kind of battery management system total voltage processing methods based on functional safety.Including step：S1, total voltage and each monomer voltage are acquired in real time to control unit；Simultaneously by the data transfer of electricity storage under last time battery management system to control unit；S2, judge whether total voltage acquisition fails, if not failing, perform S3, S4 is performed if failure；The total voltage that S3, output acquire in real time；S4, judge whether monomer voltage acquisition function is normal, if abnormal, perform step S5, if normally, performing step S6；The valid data of electricity storage under S5, output last time battery management system；S6, judge whether monomer voltage acquisition fails, if not failing or only partial failure, perform step S7；If all failures, perform step S8；The total voltage that S7, output monomer voltage are added up and obtained；The valid data of electricity storage under S8, output last time battery management system.The present invention can guarantee that battery charge state accurately corrects estimation.
Description
Technical field
The present invention relates to a kind of battery management system total voltage processing method based on functional safety, belong to battery detection with
Management domain.
Background technology
As electronic technology penetrates into automotive field, automotive circuit diagram degree increasingly improves, in addition hybrid vehicle and pure
Electric vehicle increases power battery and high voltage control circuit system on the basis of orthodox car, and passes through battery management system
Controlled and estimated battery charge state.
The system estimation battery capacity of Vehicular dynamic battery management at present, mainly joins according to the current basic status of battery
Number, such as electric current, voltage, temperature etc., wherein electric current carry out electricity estimation by accumulative ampere-hour integration, and since current integration is led
Cumulative errors is caused to become larger, are usually required for being modified, most important corrected parameter is power battery voltage and battery charge shape
The linear relationship of state carries out amendment of tabling look-up.Outrange since voltage acquisition will appear under vehicle operating status, data acquisition is lost
The problems such as effect, leads to not correctly be corrected.
There is total electricity in the process of moving, in vibrations, high temperature, heavy current impact, overvoltage impact in pure electric vehicle
The failure of removal such as pressure sampling harness loosening or hardware Acquisition Circuit open circuit, cause total voltage to fail, and then influence battery charge shape
State is estimated, needs that technical staff is waited for carry out fault diagnosis investigation to scene, time-consuming and laborious, increases after-sales service cost.Battery
There are two types of situations for management system treatment measures：The first, does not process, after total voltage acquisition is higher or relatively low, battery charge
State is modified respectively to 100 and 0, and being corrected to 100 causes mistake to be corrected to 0 using battery and led to not stop using vehicle
Only；Second, total voltage is not used to be modified, battery charge state is increasing with electric current scores accumulated error, causes
The unreasonable use of battery.
Consequence is exactly caused by the above situation：(1) the unreasonable use of battery causes cell degradation to aggravate, and vehicle can not meet
Quality guarantee period；(2) vehicle abends, and personnel after sale is caused frequently to arrive Solve on site problem.
Problems described above is that this is not carried out more with the safety-related signal of whole vehicle functions to total voltage after all
Effectively to diagnose and handling.
Invention content
The purpose of the present invention is to provide a kind of battery management system total voltage processing method based on functional safety, mainly
Solve that existing this does not carry out asking for more efficiently diagnosis and processing with the safety-related signal of whole vehicle functions to total voltage
Topic.The present invention, by diagnosing accordingly and treatment measures, is estimated using the signals such as total voltage, monomer voltage of power battery acquisition
Rational power battery charged state amendment total voltage is calculated, and then ensures that battery charge state accurately corrects estimation.
To achieve these goals, the technical solution adopted by the present invention is as follows：
A kind of battery management system total voltage processing method based on functional safety, includes the following steps：
S1, the in real time monomer voltage of acquisition total voltage and each single battery are to control unit；Simultaneously by last time cell tube
The data transfer of electricity storage is to control unit under reason system；
S2, judge whether total voltage acquisition fails, if not failing, perform S3, S4 is performed if failure；
The total voltage that S3, output acquire in real time；
S4, judge whether monomer voltage acquisition function is normal, if abnormal, perform step S5, if normally, performing step
Rapid S6；
The valid data of electricity storage under S5, output last time battery management system；
S6, judge whether whole monomer voltages acquisitions fail, if not failing or only partial failure, perform step
S7；If all failures, perform step S8；
The total voltage that S7, output monomer voltage are added up and obtained；
The valid data of electricity storage under S8, output last time battery management system.
Specifically, the step S2, the judgment principle whether total voltage acquisition fails are：If the total voltage of acquisition is more than to adopt
Collect range or total voltage sampling line open fault, then fail.
Further, the step S4, the judgment principle whether monomer voltage acquisition fails are：To each single battery
Monomer voltage is judged whether to fail successively, when judging, is adopted if the monomer voltage of acquisition is more than acquisition range or monomer voltage
Line-transect open fault, then monomer voltage failure, continues to judge next monomer voltage, finally obtains and does not fail or partly lose
Effect or all failure.
Further, do not fail or during only partial failure in monomer voltage, in step S7, monomer voltage add up and
The computational methods for obtaining total voltage are：Sum to all effective monomer voltages, obtain effective monomer voltage accumulation and, so
It averages afterwards to effective monomer voltage, is effective monomer average voltage by the cell voltage value processing of failure, finally
Add up to monomer voltage and, i.e. total voltage.
Still further, in step S1, the data of electricity storage include under last time battery management system：Total voltage, maximum have
Effect monomer voltage, minimum effective monomer voltage, effective monomer average voltage, monomer voltage adds up and battery charge state, and
And every time after acquisition output, the data update by electricity storage under last time is this data.
Still further, in step S5 and step S8, electricity storage is effective under the output last time battery management system
Data are total voltage value.
In addition, before step S5 and step S8 is performed, it is intended to judge to store whether data fail, the amount of exports if failure
Fixed total voltage value, and be current time collection value by currently stored data update.
Compared with prior art, the invention has the advantages that：
The present invention is on existing battery management system basis, by making full use of software and hardware resources and being pacified by function
Complete analysis handles battery management system key signal, and the different total voltage gathered data of two-way is mutually verified and located
Reason, after any gathered data all the way breaks down, battery management system can carry out dynamic corrections processing, electric under last time by storing
Total voltage related data carrying out checking treatment after the power is turned on next time, battery charge state can use total voltage processing module to working as
Preceding system can carry out arbitration process to ensure that other algoritic modules using rational total voltage, fully ensure that it rationally with total voltage
Property, the safety of battery management system and reliability higher；Battery management system has ensured the normal of vehicle after going wrong
Traveling, makes personnel after sale no longer frequently investigate problem；It has ensured the accurate use of battery, can fully extend service life.
Description of the drawings
Fig. 1 is that the hardware of the present invention-embodiment acquires block diagram.
Fig. 2 is the software systems block diagram of the present invention-embodiment.
Fig. 3 is the present invention-embodiment total voltage acquisition processing module flow chart.
Fig. 4 is the present invention-embodiment total voltage crash handling module flow diagram.
Fig. 5 is the present invention-embodiment monomer voltage acquisition processing module flow chart.
Fig. 6 is the present invention-embodiment monomer voltage crash handling module flow diagram.
Fig. 7 stores data failure processing module flow chart for the present invention-embodiment.
Fig. 8 can use total voltage processing module flow chart for the present invention-embodiment battery charge state.
Specific embodiment
With reference to embodiment and attached drawing, the invention will be further described, and embodiments of the present invention include but not limited to
The following example.
Embodiment
As shown in Figure 1, a kind of battery management system total voltage processing system based on functional safety, hardware components include total
Voltage acquisition module, monomer voltage acquisition module, control unit, data memory module, total voltage acquisition module and monomer voltage
The output terminal of acquisition module is connect with control unit, and data memory module is connect with control unit.
As shown in Fig. 2, software section includes：
1) total voltage acquisition processing module：Acquisition total voltage be original total voltage, it is filtered filtered after total voltage.
2) total voltage crash handling module：It is more than acquisition range or total voltage sampling line open circuit event to judge the total voltage acquired
Barrier then exports the voltage value of electricity storage under last time battery management system.
3) monomer voltage acquisition processing module：Monomer voltage original value is acquired, asks maximum effective monomer voltage, minimum effectively
Monomer voltage, average effective monomer voltage, monomer voltage add up and.
4) monomer voltage crash handling module：If control unit, which powers on, can not acquire monomer voltage or monomer voltage all loses
Effect, then using the maximum effective monomer voltage of electricity storage, minimum effective monomer voltage and effective monomer electricity under control unit last time
Flatten mean value；The monomer voltage of acquisition is more than that range or monomer voltage sampling line open circuit judge failure, then to corresponding invalid single
The processing of bulk voltage value is effective monomer average voltage.
5) data processing module is stored：The total voltage of electricity storage, maximum effective monomer voltage, minimum under last time is effectively single
Bulk voltage, effective monomer average voltage, monomer voltage adds up and battery charge state；Lower electricity storage is updated to current every time
The total voltage of processing, maximum effective monomer voltage, minimum effective monomer voltage, effective monomer average voltage, monomer voltage tire out
It sums it up, battery charge state.
6) data failure processing module is stored：Data failure is stored, then current time acquisition is updated to current stored value
Value, at this point, battery charge state can be then specified total voltage with total voltage.
Battery charge state can use total voltage processing procedure：Judge whether acquired original total voltage fails, if total voltage is adopted
Collection, which does not fail, then uses total voltage；Otherwise judge whether monomer voltage acquisition function is effective, if in vain, using last time cell tube
Under reason system electricity storage voltage value, otherwise judge whether monomer voltage fails, fail, using monomer voltage add up with, if
All failures, then using the total voltage value of electricity storage under last time battery management system；It is electric in the case where using last time battery management system
During the total voltage value of storage, also to judge to store whether data fail, specified total voltage value be exported if failure, and will be current
Storage data update is current time collection value.
A kind of battery management system total voltage processing method based on functional safety, includes the following steps：
1) as shown in figure 3, the total voltage of acquired original is BatU0, it is after being filtered to the total voltage of acquired original
BatU1。
2) as shown in figure 4, whether the total voltage BatU0 for judging acquired original is more than acquisition upper limit BatUMax or lower limit
BatUMin, total voltage sampling line open fault flag bit BatULineOpen are 1, above-mentioned 3 conditions any one set up (i.e.
Total voltage acquisition failure) total voltage BatU2 is then assigned a value of to the total voltage of electricity storage under upper deuterzooid battery management system low pressure
CellBatU0, above-mentioned 3 conditions all invalid (i.e. total voltage acquisition is effective) are then assigned a value of filtered total voltage BatU1, right
BatU2 is filtered to obtain BatU3.
3) as shown in figure 5, the monomer voltage CellU0 [n] of acquired original, wherein n, which are present battery, manages system acquisition
Monomer number carries out CellU0 [n] whether each monomer voltage CellU [i] of n times cycle criterion is more than the acquisition upper limit
CellUMax or lower limit CellUMin, monomer voltage sampling line open fault flag bit CellULineOpen [i] are 1, above-mentioned 3
Any one establishment of a condition then carries out m to add 1, and above three condition is all invalid, sums, obtains to CellU [i]
Effective monomer voltage accumulation and CellBatU；Seeking effective monomer average voltage, i.e. AverCellU0 is CellBatU/ (n-m),
Monomer voltage add up sum total voltage CellBatU0 be AverCellU0*n；The n-m monomer not failed is asked using bubbling method
Obtain maximum effective monomer voltage MaxCellU0, minimum effective monomer voltage MinCellU0.
4) as shown in fig. 6, first determine whether failure monomer number that monomer voltage acquisition processing module in Fig. 5 calculates whether be
N, i.e., it is then electricity under battery management system last time to monomer voltage CellU1 [i] processing that whole monomer voltages, which fail or can not acquire,
The effective monomer average voltage AverCellUNVM1 of storage, maximum effective monomer voltage MaxCellU1 were in order to control under unit last time
The maximum effective monomer voltage MaxCellUNVM1 of electricity storage, minimum effective monomer voltage MinCellU1 are electricity storage under last time
Minimum effective monomer voltage MinCellUNVM1, effective monomer average voltage AverCellU1 be last time under electricity storage have
Imitate monomer voltage average value AverCellUNVM1；Otherwise maximum effective monomer voltage, minimum effective monomer voltage, effective monomer
Average voltage uses the value that Fig. 5 monomer voltages acquisition processing module calculates, and the monomer voltage of failure is assigned a value of effective monomer
Average voltage AverCellU0.
5) it is effective that the effective monomer average voltage AverCellUNVM0 of electricity storage, maximum under control unit last time are read
Monomer voltage MaxCellUNVM0, minimum effective monomer voltage MinCellUNVM0, total voltage BatUNVM0, battery charge state
SOCNVM0。
6) as shown in fig. 7, the non-failure state NVMSt of storage data then exports storage value, otherwise judge monomer not equal to 1
Whether voltage all fails, that is, whether the monomer number m that judges to fail is equal to monomer populations n, to effective monomer voltage if setting up
Average value AverCellUNVM1 is assigned a value of Fig. 6 collection values AverCellU1, maximum effective monomer voltage MaxCellUNVM1 assignment
Fig. 6 collection values MinCellU1, total electricity are assigned a value of for Fig. 6 collection values MaxCellU1, minimum effective monomer voltage MinCellNVM1
BatUNVM1 is assigned a value of collection value CellBatU0 to pressure, battery charge state SOCNVM1 is assigned a value of Fig. 6 collection values SOCNVM0；If
Judge the data failure of all storages, MaxCellUNVM1, MinCellNVM1, AverCellU1 are set as specified monomer voltage
Value, BatUNVM1 are set as specified total voltage value, battery charge state SOCNVM1 assignment appearance setting values.
7) as shown in figure 8, whether the total voltage BatU0 for judging acquired original is more than acquisition upper limit BatUMax or lower limit
BatUMin, total voltage sampling line open fault flag bit BatULineOpen are 1, and above-mentioned 3 condition does not all set up then battery charge
State can be assigned a value of BatU3 with total voltage BatUHld；Otherwise judge whether monomer voltage acquisition function is normal, if abnormal,
Judging whether storage state fails, battery charge state can be assigned a value of BatUNVM with total voltage BatUHld if not failing, if
Then battery charge state can be assigned a value of specified total voltage value with total voltage BatUHld for failure.
If normal, judge whether whole monomer voltage acquisitions fail, that is, whether the monomer number m that fails is equal to total monomer
Number n, if non-dead battery state-of-charge can be assigned a value of CellBatU0 with total voltage BatUHld；Otherwise whether judge storage state
Failure, battery charge state can be assigned a value of BatUNVM with total voltage BatUHld if not failing, if dead battery state-of-charge
Specified total voltage value can be assigned a value of with total voltage BatUHld.
If monomer voltage average value, maximum value, minimum value, that is, total voltage storage value are respectively stored in hardware different memory areas
Domain, in the case where total voltage and monomer voltage all fail, battery charge state can have 4 spare total electricity respectively with total voltage
Pressure, i.e.,：Monomer voltage mean value storage value is multiplied by monomer number, monomer voltage maximum value storage value is multiplied by monomer number, monomer electricity
Pressure minimum value storage value is multiplied by monomer number, total voltage storage value.
According to above-described embodiment, the present invention can be realized well.What deserves to be explained is before based on said structure design
It puts, to solve the technical issues of similary, even if some made in the present invention are used without substantive change or polishing
Technical solution essence still as the present invention, therefore it should also be as within the scope of the present invention.
Claims (5)
1. a kind of battery management system total voltage processing method based on functional safety, which is characterized in that include the following steps：
S1, the in real time monomer voltage of acquisition total voltage and each single battery are to control unit；Simultaneously by last time battery management system
System descends the data transfer that electricity stores to control unit；
S2, judge whether total voltage acquisition fails, if not failing, perform S3, S4 is performed if failure；
The total voltage that S3, output acquire in real time；
S4, judge whether monomer voltage acquisition function is normal, if abnormal, perform step S5, if normally, performing step
S6；
The valid data of electricity storage under S5, output last time battery management system；
S6, judge whether whole monomer voltages acquisitions fail, if not failing or only partial failure, perform step S7；If
All failures, then perform step S8；
The total voltage that S7, output monomer voltage are added up and obtained；
The valid data of electricity storage under S8, output last time battery management system；
The step S2, the judgment principle whether total voltage acquisition fails are：If the total voltage of acquisition is more than to acquire range or total
Voltage sample line open fault, then fail；
The step S6, the judgment principle whether monomer voltage acquisition fails are：The monomer voltage of each single battery is carried out
Judge whether to fail successively, when judging, if the monomer voltage of acquisition is more than acquisition range or monomer voltage sampling line open fault,
Then the monomer voltage fail, continue to judge next monomer voltage, finally obtain do not fail partial failure or all failure.
2. a kind of battery management system total voltage processing method based on functional safety according to claim 1, feature
It is, when monomer voltage does not have failure or only partial failure, in step S7, monomer voltage adds up and obtain the meter of total voltage
Calculation method is：Sum to all effective monomer voltages, obtain effective monomer voltage accumulation and, then to effective monomer
Voltage is averaged, and is effective monomer average voltage by the cell voltage value processing of failure, is finally obtained monomer voltage and add up
With i.e. total voltage.
3. a kind of battery management system total voltage processing method based on functional safety according to claim 1, feature
It is, in step S1, the data of electricity storage include under last time battery management system：Total voltage, maximum effective monomer voltage, minimum
Effective monomer voltage, effective monomer average voltage, monomer voltage adds up and battery charge state, and acquisition output every time
Afterwards, it is this data by the data update of electricity storage under last time.
4. a kind of battery management system total voltage processing method based on functional safety according to claim 3, feature
It is, in step S5 and step S8, the valid data of electricity storage are total voltage value under the output last time battery management system.
5. a kind of battery management system total voltage processing method based on functional safety according to claim 4, feature
It is, before step S5 and step S8 is performed, also judges to store whether data fail, specified total electricity is exported if failure
Pressure value, and be current time collection value by currently stored data update.
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| CN105911481B (en) * | 2016-04-22 | 2019-03-26 | 成都雅骏新能源汽车科技股份有限公司 | A kind of battery charge state initial value evaluation method |
| CN106154175B (en) * | 2016-06-29 | 2018-11-06 | 成都雅骏新能源汽车科技股份有限公司 | Rechargeable battery state-of-charge estimating system based on dynamic differential pressure and workflow |
| CN106405314A (en) * | 2016-11-28 | 2017-02-15 | 成都雅骏新能源汽车科技股份有限公司 | Portable intelligent battery pack sampling wiring harness test system |
| CN109541481A (en) * | 2017-09-22 | 2019-03-29 | 郑州宇通客车股份有限公司 | A kind of voltage estimate, management method and the system of used in new energy vehicles battery pack |
| CN111273176B (en) * | 2018-12-05 | 2022-03-25 | 宁德时代新能源科技股份有限公司 | Fault diagnosis optimization method, device, system and storage medium |
| CN111487542A (en) * | 2020-04-27 | 2020-08-04 | 力高(山东)新能源技术有限公司 | Method for calculating SOC (State of Charge) of battery management system of new energy automobile |
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