CN108608890B - A kind of on-vehicle battery electric current output On-Line Control Method based on health protection - Google Patents
A kind of on-vehicle battery electric current output On-Line Control Method based on health protection Download PDFInfo
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- CN108608890B CN108608890B CN201810552696.7A CN201810552696A CN108608890B CN 108608890 B CN108608890 B CN 108608890B CN 201810552696 A CN201810552696 A CN 201810552696A CN 108608890 B CN108608890 B CN 108608890B
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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
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Sustainable Energy (AREA)
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- Automation & Control Theory (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of on-vehicle battery electric currents based on health protection to export On-Line Control Method; the output power of on-vehicle battery state parameter and the distribution of vehicle energy manager is obtained in real time; it constructs cell health state and characterizes function; it calculates and obtains current time cell health state coefficient of colligation; and construct healthy current function; it is constraint with battery expectation cycle-index, the battery health for calculating acquisition optimization exports electric current；Electric current output function is constructed with battery desired output electric current and battery health output electric current again, the optimization output electric current for obtaining battery current time and the used update charge and discharge cycles number of battery in the subsequent cycle period are calculated, realizes that on-vehicle battery electric current exports On-line Control.The present invention provides the output power being allocated by energy manager premised on meeting battery, and the output electric current of battery is controlled by real-time online, and optimization battery uses, and extends vehicle battery life.
Description
Technical field
The present invention relates to a kind of cell output current control technologies, specifically a kind of to pass through function model online evaluation
Vehicle battery status, and the control method of dynamic adjustment is carried out to battery discharge current.
Background technique
Important component of the battery as automobile power source Energy Management System, the guarantee of its performance is to energy content of battery pipe
The validity of reason system is most important, and effective charge and discharge control strategy can optimize the service condition of battery in real time, extends vehicle
The service life of battery.
In the prior art, most researchers are directed to the research of existing hybrid vehicle power-supply management system, only examine
Consider the relationship of state-of-charge SOC and battery health coefficient S OH, and then determines the influence to cell health state.But due to battery
It is interrelated between health status and battery health coefficient S OH, battery open circuit voltage and battery temperature, only to partial parameters
Research will affect the Evaluation accuracy of cell health state.The current research influenced for battery life is relatively single, not comprehensive
Close consider the conditions such as battery health coefficient S OH, battery temperature and different rush of current to the synergy of cell health state, because
It is excessive that this will lead to battery discharge current fluctuation, causes vehicle dynamic property insufficient and shortens battery.In addition, existing
Power-supply management system not yet consider the limitation of battery supply capacity, there is desired output power beyond battery supply capacity
Situation, to not be able to satisfy the distribution of vehicle energy manager.
Summary of the invention
The present invention is to provide a kind of on-vehicle battery based on health protection to avoid the problems of above-mentioned prior art
Electric current export On-Line Control Method, to can meet needed for battery under the premise of, provide by energy manager into
The output power of row distribution, real-time online control cell output current, optimize the service condition of battery, to extend vehicle battery
Service life.
Purpose adopts the following technical scheme that realize the present invention
The characteristics of the present invention is based on the on-vehicle battery electric current of health protection exports On-Line Control Method is: obtaining in real time current
The output power of state parameter and vehicle the energy manager distribution of moment battery, the expectation for calculating acquisition current time battery are defeated
Electric current out；Using the internal temperature of battery at the current time obtained in real time, the charge and discharge number recycled and battery characterization service life,
It calculates and obtains current time cell health state coefficient of colligation；It is constructed with cell health state coefficient of colligation and battery status parameter
Healthy current function is constraint with battery expectation cycle-index, calculates and obtains battery current time and consider the strong of access times
Health exports electric current；Electric current output function is constructed with battery desired output electric current and battery health output electric current again, calculates and obtains electricity
The optimization output electric current at pond current time and the used update charge and discharge cycles number of battery in the subsequent cycle period, realize vehicle
It carries battery current and exports On-line Control.
The characteristics of the present invention is based on the on-vehicle battery electric current of health protection exports On-Line Control Method lies also in by following step
It is rapid to carry out:
Step 1, the state-of-charge C for obtaining current time battery in real timeSWith battery open circuit voltage UOC, calculated using formula (1)
Obtain current time spark internal resistance RIt putsWith power load equivalent resistance RL:
In formula (1), P is the output power that vehicle energy manager distributes to battery under current time；
Step 2 calculates the desired output electric current I for obtaining the battery at output power P using formula (2)It is expected that:
Step 3, the charge and discharge frequency n for obtaining the internal temperature of battery T at current time in real time, having recycledIt usesAnd battery characterization
Service life CH, CH=0.8-1；It is calculated using formula (3) and obtains current time cell health state coefficient of colligation H:
In formula (3), discharge time n has been recycledIt usesRefer to: battery current health state is equivalent under 15A standard discharge current
Cycle charge-discharge number has recycled discharge time nIt usesInitial value be set as 0；Q is battery Energy in use accounting；Q0For battery
Nominal rating capacitance；
Step 4, acquisition battery current time consideration battery is calculated by formula (4), and the healthy of access times exports electric current IHealth:
In formula (4), G10Indicate the battery using state ginseng that battery is obtained under off-line state with 10 Ampere currents constant-current discharges
Number, G50Indicate the battery using state parameter that battery is obtained under off-line state with 50 Ampere currents constant-current discharges.
Step 5 calculates current time remaining battery charge and discharge cycles frequency n using formula (5)It is remaining:
In formula (5), CH terminatesIt is taken as 0.8, IStandardValue 15A；
Step 6 defines NIt is expected thatCycle-index it is expected for the battery of setting, and whether judgement such as following formula (6) is true:
nIt is remaining≥NIt is expected that-nIt uses(6),
If formula (6) is set up, 7 are thened follow the steps；
If formula (6) is invalid, the health output electric current I for obtaining optimization is calculated using formula (7)* Health；
Return step 5, and by the output electric current I in step 5HealthReplace with health output electric current I* Health；
Step 7 calculates acquisition battery using formula (8) in the optimization output electric current I at current timeOUT,
Step 8 calculates acquisition and output electric current I using formula (9)OUTThe used update charge and discharge of corresponding battery follow
Ring number
In formula (9), sampling periods TPeriodIt is taken as 200ms, Δ nLossIndicate sampling periods TPeriodInterior energy content of battery loss is to battery
The influence in service life, to update charge and discharge cycles numberSubstitute the charge and discharge cycles frequency n in the subsequent cycle periodIt uses, realize
Electric current I is exported by the optimization that formula (8) is characterizedOUTOn-line Control is carried out to the electric current output of Vehicular battery.
The characteristics of the present invention is based on the on-vehicle battery electric current of health protection exports On-Line Control Method lies also in: the battery
Use state parameter G10And G50It is calculated and is obtained by formula (10):
Compared with the prior art, the invention has the advantages that:
1, the method for the present invention utilizes the state-of-charge C obtained in real timeS, battery open circuit voltage UOCWith the characterization service life of battery
CH, the cell health state parameter estimated, and then analytical calculation meets vehicle dynamic property and optimization battery maximum service life (MSL)
Output electric current, thus realize automobile batteries output electric current optimization.
2, the present invention can monitor the use of vehicle battery in real time by obtaining internal temperature of battery and size of current in real time
State, and to its it is currently used under the conditions of battery service life is assessed, solve to vehicle cell health state into
The technical problem for not taking into account the factors such as temperature when row estimation；Meanwhile the method for the present invention helps to detect battery building ring
Border rationally controls battery operating temperature, to achieve the purpose that extend battery.
3, the present invention can make the battery moment under discharge condition be in reasonable discharge current range, optimize battery
Service condition extends the service life of battery；Facilitate cell output and participate in vehicle power-distribution management, it is ensured that battery
Service life while improve automobile fuel ecomomy.
4, the present invention is by being directed to battery CS, battery open circuit voltage, battery characterization service life CHAnd internal temperature of battery tracking
Realize the real-time and adaptivity of cell output current control, it is thus possible to real vehicle on-line implement.
Detailed description of the invention
Fig. 1 is the battery discharge status internal resistance of cell of the present invention and CSGraph of relation；
Fig. 2 is the discharge process battery model figure that the present invention simplifies；
Fig. 3 is cell health state parameter and cycle-index relational graph under battery difference discharge current of the present invention.
Specific embodiment
On-vehicle battery electric current output On-Line Control Method in the present embodiment based on health protection is: when obtaining current in real time
The state parameter of battery and the output power of vehicle energy manager distribution are carved, the desired output for obtaining current time battery is calculated
Electric current；Utilize the internal temperature of battery at the current time obtained in real time, the charge and discharge number recycled and battery characterization service life, meter
It calculates and obtains current time cell health state coefficient of colligation；It is strong with cell health state coefficient of colligation and battery status parameter building
Health current function is constraint with battery expectation cycle-index, and calculating obtains the health for considering access times at battery current time
Export electric current；Electric current output function is constructed with battery desired output electric current and battery health output electric current again, calculates and obtains battery
The optimization output electric current at current time and the used update charge and discharge cycles number of battery in the subsequent cycle period, are realized vehicle-mounted
Battery current exports On-line Control.
On-vehicle battery electric current output On-Line Control Method in the present embodiment based on health protection is to carry out as follows:
Step 1, the state-of-charge C for obtaining current time battery in real timeSWith battery open circuit voltage UOC, calculated using formula (1)
Obtain current time spark internal resistance RIt putsWith power load equivalent resistance RL:
In formula (1), P is the output power that vehicle energy manager distributes to battery under current time.It is obtained under off-line state
Pick and place spark internal resistance R in electric processIt putsWith the state-of-charge C of batterySThe functional relation changed over time, as shown in Figure 1,
Take state-of-charge CSConventional section 0.2-0.9 obtains linear functional relation, during discharge test, when battery terminal voltage drops to
10.5V, it is believed that electric discharge terminates.
Step 2 calculates the desired output electric current I for obtaining the battery at output power P using formula (2)It is expected that:
In specific implementation, the electric current, voltage relationship in equivalent-circuit model figure are as shown in Fig. 2, derive output electric current
IIt is expected that。
Step 3, the charge and discharge frequency n for obtaining the internal temperature of battery T at current time in real time, having recycledIt usesAnd battery characterization
Service life CH, CH=0.8-1；CHFor the battery characterization service life, if CHValue then continues to execute this step 3 between 0.8 to 1；If CH
Value is lower than 0.8, then is determined as that battery has been unsatisfactory for cycle charge discharge electric condition, needs to change battery；
It is calculated using formula (3) and obtains current time cell health state coefficient of colligation H:
In formula (3), discharge time n has been recycledIt usesRefer to: battery current health state is equivalent under 15A standard discharge current
Cycle charge-discharge number has recycled discharge time nIt usesInitial value be set as 0；Q is battery Energy in use accounting, Q0For battery
Nominal rating capacitance；Influence of the different size of discharge current to battery life has notable difference, will be in the present embodiment
nIt usesThe battery access times of expression are converted to the battery life behaviour in service under the conditions of 15A current discharge, are directed in the present embodiment
Normalized is made in influence of the discharge current to battery charging and discharging cycle-index.In specific implementation, 1.682 in formula (3) are indicated
For voltage on the basis of 12.6 volts, square every increase by 1 of voltage increases by 1.682% to the loss of battery life；2.858 indicating
Temperature is every to increase by 1 degree Celsius on the basis of 25 degrees Celsius, increases by 2.858% to the loss of battery life.
Step 4, acquisition battery current time consideration battery is calculated by formula (4), and the healthy of access times exports electric current IHealth:
In formula (4), G10Indicate the battery using state ginseng that battery is obtained under off-line state with 10 Ampere currents constant-current discharges
Number, G50Indicate the battery using state parameter that battery is obtained under off-line state with 50 Ampere currents constant-current discharges.In specific implementation,
Consider that battery discharge current is usually no more than 50A under working condition, provides 10A, the battery under 30A and 50A discharging condition uses
The corresponding relationship of state parameter and charge and discharge cycles number is as shown in Figure 3.Fig. 3 curve A is that 10 amperes of discharge currents make with battery
With the relationship of state parameter, curve B is the relationship of 50 amperes of discharge currents and battery using state parameter, and curve C is 30 amperes
The relationship of discharge current and battery using state parameter.
Step 5 calculates current time remaining battery charge and discharge cycles frequency n using formula (5)It is remaining:
In formula (5), CH terminatesIt is taken as 0.8, IStandardValue 15A, charge and discharge cycles number is put with 15A electric current in the present embodiment
Subject to electric situation, influence of the discharge current to charge and discharge cycles number in this cycle period is calculated, and be converted to 15A discharge current
Under the conditions of influence to battery life.
Step 6 defines NIt is expected thatCycle-index it is expected for the battery of setting, and whether judgement such as following formula (6) is true:
nIt is remaining≥NIt is expected that-nIt uses(6),
If formula (6) is set up, 7 are thened follow the steps；
If formula (6) is invalid, the health output electric current I for obtaining optimization is calculated using formula (7)* Health；
Return step 5, and by the output electric current I in step 5HealthReplace with health output electric current I* Health。
Step 7 calculates acquisition battery using formula (8) in the optimization output electric current I at current timeOUT,
In specific implementation, the smaller value of output desired output electric current and health output electric current in formula (8).When desired output electricity
Stream is less than health output electric current, the output power of battery supplied vehicle energy manager distribution；It is good for when desired output electric current is greater than
Health exports electric current, and the present invention it is expected charge and discharge cycles number according to battery combinations of states itself, exports the health output electricity of optimization
Stream.
Step 8 utilizes (9) to calculate acquisition and output electric current IOUTThe used update charge and discharge cycles of corresponding battery
Number
In formula (9), sampling periods TPeriodIt is taken as 200ms, Δ nLossIndicate sampling periods TPeriodInterior energy content of battery loss is to battery
The influence in service life, to update charge and discharge cycles numberSubstitute the charge and discharge cycles frequency n in the subsequent cycle periodIt uses, realize
Electric current I is exported by the optimization that formula (8) is characterizedOUTOn-line Control is carried out to the electric current output of Vehicular battery.In formula (9), 1.152
Electric current is indicated on the basis of 15 amperes, every 1 ampere of increase increases by 1.152% to the loss of battery life；1.682 indicating voltage
On the basis of 12.6 volts, square every increase by 1 of voltage increases by 1.682% to the loss of battery life；2.858 indicating temperature
It is every to increase by 1 degree Celsius on the basis of 25 degrees Celsius, 2.858% is increased to the loss of battery life.
In specific implementation, battery using state parameter G10And G50It is calculated and is obtained by formula (10):
Table 1 is battery using state parameter charge and discharge cycles number mapping table:
The battery using state parameter that discharge current is under the conditions of 10A, 30A and 50A under the conditions of offline is followed with charge and discharge
The corresponding relationship of ring number is as shown in table 1.
Claims (3)
1. a kind of on-vehicle battery electric current based on health protection exports On-Line Control Method, it is characterized in that: when obtaining current in real time
The state parameter of battery and the output power of vehicle energy manager distribution are carved, the desired output for obtaining current time battery is calculated
Electric current；Utilize the internal temperature of battery at the current time obtained in real time, the charge and discharge number recycled and battery characterization service life, meter
It calculates and obtains current time cell health state coefficient of colligation；It is strong with cell health state coefficient of colligation and battery status parameter building
Health current function is constraint with battery expectation cycle-index, and calculating obtains the health for considering access times at battery current time
Export electric current；Electric current output function is constructed with battery desired output electric current and battery health output electric current again, calculates and obtains battery
The optimization output electric current at current time and the used update charge and discharge cycles number of battery in the subsequent cycle period, are realized vehicle-mounted
Battery current exports On-line Control.
2. the on-vehicle battery electric current according to claim 1 based on health protection exports On-Line Control Method, it is characterized in that
It carries out as follows:
Step 1, the state-of-charge C for obtaining current time battery in real timeSWith battery open circuit voltage UOC, calculated and obtained using formula (1)
Current time spark internal resistance RIt putsWith power load equivalent resistance RL:
In formula (1), P is the output power that vehicle energy manager distributes to battery under current time；
Step 2 calculates the desired output electric current I for obtaining the battery at output power P using formula (2)It is expected that:
Step 3, the charge and discharge frequency n for obtaining the internal temperature of battery T at current time in real time, having recycledIt usesWith the battery characterization service life
CH, CH=0.8~1；It is calculated using formula (3) and obtains current time cell health state coefficient of colligation H:
In formula (3), discharge time n has been recycledIt usesRefer to: battery current health state is equivalent under 15A standard discharge current and has followed
Ring charge and discharge number, has recycled discharge time nIt usesInitial value be set as 0；Q is battery Energy in use accounting；Q0It is nominal for battery
Rated capacitance；
Step 4, acquisition battery current time consideration battery is calculated by formula (4), and the healthy of access times exports electric current IHealth:
In formula (4), G10Indicate the battery using state parameter that battery is obtained under off-line state with 10 Ampere currents constant-current discharges, G50
Indicate the battery using state parameter that battery is obtained under off-line state with 50 Ampere currents constant-current discharges.
Step 5 calculates current time remaining battery charge and discharge cycles frequency n using formula (5)It is remaining:
In formula (5), CH terminatesIt is taken as 0.8, IStandardValue 15A；
Step 6 defines NIt is expected thatCycle-index it is expected for the battery of setting, and whether judgement such as following formula (6) is true:
nIt is remaining≥NIt is expected that-nIt uses(6),
If formula (6) is set up, 7 are thened follow the steps；
If formula (6) is invalid, the health output electric current I for obtaining optimization is calculated using formula (7)* Health；
Return step 5, and by the output electric current I in step 5HealthReplace with health output electric current I* Health；
Step 7 calculates acquisition battery using formula (8) in the optimization output electric current I at current timeOUT,
Step 8 utilizes (9) to calculate acquisition and output electric current IOUTThe used update charge and discharge cycles number of corresponding battery
In formula (9), sampling periods TPeriodIt is taken as 200ms, Δ nLossIndicate sampling periods TPeriodInterior energy content of battery loss is to battery life
Influence, to update charge and discharge cycles numberSubstitute the charge and discharge cycles frequency n in the subsequent cycle periodIt uses, realize the formula of pressing
(8) the optimization output electric current I characterizedOUTOn-line Control is carried out to the electric current output of Vehicular battery.
3. the on-vehicle battery electric current according to claim 2 based on health protection exports On-Line Control Method, it is characterized in that: institute
State battery using state parameter G10And G50It is calculated and is obtained by formula (10):
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Citations (4)
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| CN102881956A (en) * | 2012-09-28 | 2013-01-16 | 引峰新能源科技（上海）有限公司 | Hybrid power source energy management method of fuel battery |
| CN104459551A (en) * | 2014-11-28 | 2015-03-25 | 山东理工大学 | Electric vehicle power battery state-of-energy estimation method |
| CN105244553A (en) * | 2014-07-09 | 2016-01-13 | 上海汽车集团股份有限公司 | Battery charging and discharging current control method and method for using same to establish BMS (Battery Management System) model |
| CN106599333A (en) * | 2015-10-20 | 2017-04-26 | 郑州宇通客车股份有限公司 | Method for estimating SOH of power supply |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101516899B1 (en) * | 2013-12-31 | 2015-05-04 | 현대모비스 주식회사 | Power conversion apparatus for vehicle and Method for controling the same |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102881956A (en) * | 2012-09-28 | 2013-01-16 | 引峰新能源科技（上海）有限公司 | Hybrid power source energy management method of fuel battery |
| CN105244553A (en) * | 2014-07-09 | 2016-01-13 | 上海汽车集团股份有限公司 | Battery charging and discharging current control method and method for using same to establish BMS (Battery Management System) model |
| CN104459551A (en) * | 2014-11-28 | 2015-03-25 | 山东理工大学 | Electric vehicle power battery state-of-energy estimation method |
| CN106599333A (en) * | 2015-10-20 | 2017-04-26 | 郑州宇通客车股份有限公司 | Method for estimating SOH of power supply |
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