CN103543404B - A kind of for idling start-stop system to the monitoring device of battery condition and method - Google Patents
A kind of for idling start-stop system to the monitoring device of battery condition and method Download PDFInfo
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Abstract
The present invention relates to a kind of monitoring device for idling start-stop system to battery condition, including processor, memorizer；One end of one voltage sensor is connected with described processor, and the other end of voltage sensor is connected with the positive pole of accumulator, and this voltage sensor is used for detecting battery tension；One end of one temperature sensor is connected with the AD mouth of described processor, and the temperature sensor other end is connected with the positive pole of accumulator；This temperature sensor is used for measuring battery temp, and temperature signal is converted into analog quantity, the AD mouth of processor be acquired；The digital input port of described processor receives the status signal starting motor.Further relate to a kind of monitoring method for idling start-stop system to battery condition.The present invention, when carrying out battery condition and judging, introduces accumulator rate of change, thus cancels current sensor, reduces the cost of battery condition monitoring device, simultaneously, it is ensured that battery condition monitoring accuracy disclosure satisfy that the demand of idling start-stop system.
Description
Technical field
The present invention relates to electronic control device for automobile engine and method, be specifically related to a kind of for idling start-stop
System is to the monitoring device of battery condition and method.
Background technology
Along with environment, energy problem increasingly serious, domestic and international Ge great automobile factory is all actively developing energy-saving and emission-reduction
The research of new technique and application.Idling start-stop system reduces even by stopping electromotor during auto idle speed state
Eliminate idling oil consumption and discharge.Due to its technology maturation, former car system is changed the least, cost increase few etc. excellent
Gesture, in the coming years, external car load factory is all with idling start-stop system 100% standard configuration as target.And to realize idle
Speed start stop system, needs to be monitored battery condition in real time, when accumulator electric-quantity is relatively low, opens in time
Accumulator is charged by dynamic electromotor, it is to avoid owing to overdischarge causes electromotor to start.
Chinese patent 200310107882.3 discloses the monitoring of a kind of battery condition based on State Estimation Theory
Method.The method is primarily adapted for use in power lithium-ion battery, and needs to measure internal storage battery electromotive force.
In actual applications, internal storage battery electromotive force is difficult to measure.Chinese patent 200680006248.2 discloses
A kind of method according to the change of engine starting process battery tension, battery condition being monitored and learning.
But, the method needs to measure battery current, and special current sensor is relatively costly, and the method without
Method estimates the real time electrical quantity in battery operation.
Summary of the invention
The invention aims to the deficiency overcoming existing battery condition monitoring device and method to exist,
Thering is provided a kind of monitoring device for idling start-stop system to battery condition, it can reduce idling start-stop system
System cost, ensures precision simultaneously, meets idling start-stop system requirements.
It is a further object to provide a kind of monitoring side for idling start-stop system to battery condition
Method, this monitoring method can determine that accumulator electric-quantity is enough, to activate idling start-stop function, ensures simultaneously
Can normally start after engine stop and car load electric equilibrium requirement；Can determine that accumulator electric-quantity is the most very few,
To start electromotor to accumulator charging, it is to avoid excessively power shortage；Also can determine that accumulator ageing state, with right
The relevant parameter of accumulator is modified.
A kind of monitoring device for idling start-stop system to battery condition of the present invention, including processing
The memorizer that device is connected with processor, is characterized in that:
One end of one voltage sensor is connected with described processor, the other end of voltage sensor and accumulator
Positive pole connects, and this voltage sensor is used for detecting battery tension；
One end of one temperature sensor is connected with the AD mouth of described processor, the temperature sensor other end and storage
The positive pole of battery connects；This temperature sensor is used for measuring battery temp, and temperature signal is converted into simulation
Amount, is acquired by the AD mouth of processor；
The digital input port of described processor receives the state signal starting motor shape, starts motor status signal and leads to
The power supply signal crossing detection startup motor obtains.
Described a kind of monitoring device for idling start-stop system to battery condition, is characterized in that: described place
Reason device is independent processor, or merges with other processor on automobile, as engine controller, idling rise
Stop controller.
A kind of monitoring method for idling start-stop system to battery condition of the present invention, this monitoring method
Using the above-mentioned monitoring device to battery condition, its step is as follows:
(1) accumulator ageing state judges；At engine startup, according to starting initial time
Minimum voltage in battery tension and start-up course estimates accumulator ageing state；
(2) calculating accumulator voltage change ratio；When electromotor is in idle stop state, store
Cell voltage rate of change calculates, and when other state, does not calculate battery tension rate of change；
Owing to battery tension changes over relatively slow, and when load current changes, it is easily generated fluctuation,
So, adopt calculating accumulator voltage change ratio with the following method:
First with bigger sampling period, such as 1s, battery tension is carried out continuous several times sampling, such as 60
Secondary, then multiple battery tensions of continuous sampling are processed as the following formula:
Wherein, i and k is the sampling period, and N is sampling number；In actual application, for improving data profit
By rate, sampling period i with k uses the different cycles, and general satisfaction requires as follows:
K=i × N
After being calculated average treatment voltage, battery tension rate of change can be calculated as follows:
Voltage (k-1) after voltage (k)-average treatment after battery tension rate of change (k)=average treatment；
(3) judgement that accumulator electric-quantity is the highest；According to battery tension, battery tension rate of change and perseverance
The pressure charging interval judges that accumulator electric-quantity is the highest；When start-stop enables invalidating signal, to accumulator electric-quantity whether
Abundant judge；Meet at the same time when requiring as follows, then judge that accumulator electric-quantity is abundant:
1. battery tension is more than rated voltage；2. battery tension rate of change is more than 0；3. before
1. the persistent period and the most simultaneously met in face is more than the limit value set；
1. it is to ensure that accumulator is entered constant-voltage charge state, i.e. accumulator electric-quantity by constant-current charge
Increasing, charging current decreases so that generator operation is in rated voltage；
2. it is to ensure that accumulator is in charge and non-discharged state；
3. it is to ensure that accumulator has enough constant voltage charging times so that accumulator electric-quantity reaches relatively
Many states；Charging interval limit value is the function of battery temp, and relation data between the two is with two dimension
The form of tables of data is stored in memorizer 4, uses for battery condition monitoring algorithm；This tables of data
Can be obtained by following test:
Under condition of different temperatures, first accumulator carrying out constant-current charge, voltage to be charged reaches generating
After machine rated voltage, switch to constant-voltage charge, needed for recording the state-of-charge that accumulator reaches setting
Constant voltage charging time, i.e. can get the relation of condition 3. middle charging interval limit value and battery temp；
(4) judgement that accumulator electric-quantity is the lowest；According to battery tension, battery tension rate of change
Judge that accumulator electric-quantity is the lowest with ageing state；Enable signal in start-stop effective, and electromotor is in idle
During speed stopped status, judging accumulator electric-quantity is the most very few, concrete decision method is as follows: if storing
Cell voltage is less than limit value, then judge that accumulator electric-quantity is very few；Above-mentioned limit value computing formula is as follows:
Limit value=basis limit value × aging coefficient
Wherein, basis limit value is obtained by test by new accumulator, is the letter of battery temp and voltage change ratio
Number, between relation store in memory with the form of three-dimensional data table, monitor for battery condition
Method uses；Basis limit value can be obtained by following test with the relation of temperature, voltage change ratio:
Use new accumulator, under condition of different temperatures, with different discharge currents, accumulator is carried out perseverance
Banish electricity, record voltage the most in the same time and state-of-charge；Then for the state-of-charge point set, carry
Take out voltage change ratio and the voltage in corresponding moment therewith；Finally, binding tests temperature data is the most available
Basis limit value three-dimensional data table, aging coefficient is the function of ageing state, after accumulator is aging, actual appearance
Amount reduces, so under accumulator capacity fixing situation, the voltage of aging accumulator is higher than new accumulator；Always
Change coefficient and be the voltage of aging accumulator and the ratio of new accumulator voltage, the most serious aging electric power storage
Pond, this ratio is the biggest, thus obtains the two-dimensional data table of aging coefficient and ageing state, equally, this number
It also is stored in memorizer according to table；
(5) idling start-stop enables the judgement of signal；Electricity according to accumulator judges, if it is determined that
For accumulator electric-quantity low (very few), then start-stop enables invalidating signal, the most no matter other idle stop bar
Whether part meets, and idling start-stop controller all should make electromotor be in operating condition；If it is determined that be accumulator
Electricity is high (enough), then in the case of other idle stop condition meets, and idling start-stop controller meeting
Stop electromotor；
Idling start-stop enables the decision logic of signal: if current idling start-stop enables signal effectively, and accumulator
Electricity is low, then idling start-stop enables invalidating signal；If current idling start-stop enables invalidating signal, and storage battery
Amount height, then idling start-stop enable signal is effective；Current idling start-stop is otherwise kept to enable signal condition constant.
The invention have the characteristics that under consideration idle stop state, accumulator operating mode is close to constant-current discharge, and electric power storage
When pond is discharged to same state-of-charge with different discharge currents, voltage change ratio is different；This spy according to accumulator
Property, the present invention is directed to idling start-stop control system, when carrying out battery condition and judging, introduce accumulator change
Rate, not in use by the current signal needed for existing monitoring method, thus cancels current sensor, reduces accumulator
The cost of state monitoring apparatus, simultaneously, it is ensured that battery condition monitoring accuracy disclosure satisfy that idling start-stop system
The demand of system.
Accompanying drawing explanation
Fig. 1 is the constant-current discharge curve chart of accumulator difference discharge current；
Fig. 2 is the monitoring device schematic diagram of the battery condition of the present invention；
Fig. 3 is the monitoring method schematic block diagram of the battery condition of the present invention；
Fig. 4 is the three-dimensional data table starting initial voltage, start-up course minimum voltage and aging coefficient；
Fig. 5 is the flow chart of the accumulator ageing state determination methods of the present invention；
Fig. 6 is the flow chart of the battery tension rate of change computational methods of the present invention；
Fig. 7 is the flow chart of the accumulator electric-quantity determination methods of the present invention.
Detailed description of the invention
Below in conjunction with Figure of description, the present invention is described further.
Due to the effect of generator voltage controller, when load current is less than electromotor maximum output current, send out
Motor is equivalent to source of stable pressure；When load current is more than electromotor maximum output current, electromotor is equivalent to constant current
Source.So, when accumulator is charged on real vehicle, if electricity is less, be then equivalent to constant-current charge, now electric power storage
Cell voltage increases in time；If electricity is more, be then equivalent to constant-voltage charge, now battery tension substantially constant.
So when detecting that battery tension is less than rated voltage, accumulator is in constant-current charge or electric discharge shape
State, now accumulator electric-quantity may be less.And after battery tension is more than rated voltage, illustrate to store
Battery electric quantity is the most, and charging current decreases, and is in constant-voltage charge state.Maintenance constant-voltage charge is certain
After time, accumulator i.e. basically reaches full state.According to battery tension size and constant-voltage charge persistent period
I.e. can determine that accumulator electric-quantity is the most abundant.The time that constant-voltage charge process needs maintain can be according to accumulator
Constant-voltage charge test determines.
In engine idle stopped status, owing to the load opened is relatively fixed, so accumulator is substantially at perseverance
Banish electricity condition, as shown in Figure 1.Accumulator is discharged to same SOC (charged shape with different discharge currents
State) value time, its terminal voltage and voltage rate over time all differs.Discharge current is the biggest, storage battery
Pressing the lowest, change in voltage is the fastest.So, can be according to the voltage of accumulator and voltage rate over time
Judge that accumulator electric-quantity is the most very few.
Considering that accumulator ageing process is slow, aging rear internal resistance increases, in the case of same charge and discharge current,
Accumulator voltage can significantly reduce.Current Sensorless in the monitoring device of the consideration present invention and method, and just
Often in driving conditions, it is difficult to determine the degree of aging of accumulator according only to voltage.In engine starting process,
The electric current of starter motor consumption is relatively fixed, so degree of falling according to battery tension can enter in start-up course
Row ageing state judges.
Fig. 2 is a kind of schematic diagram for idling start-stop system to the monitoring device of battery condition, and this monitoring fills
Putting the memorizer 4 including that processor 3 is connected with processor, its innovative point is: the one of a voltage sensor 2
End is connected with described processor 3, and the other end of voltage sensor is connected with the positive pole of accumulator 1, and this voltage passes
Sensor is used for detecting battery tension；
One end of one temperature sensor 5 is connected with the AD mouth of described processor 3, the temperature sensor other end with
The positive pole of accumulator 1 connects；This temperature sensor is used for measuring battery temp, and temperature signal is converted into mould
Analog quantity, is acquired by the AD mouth of processor；The digital input port of described processor 3 receives and starts motor shape
State signal, starts motor status signal and is obtained by detecting the power supply signal starting motor.
Voltage sensor 2 is used for gathering battery tension, and is transferred to processor 3 by analog quantity；Accurate for energy
Really detect that the change in voltage of accumulator, the precision of voltage sensor 2 are 1mV；
Memorizer 4 is used for storing various data, including starting initial voltage, starting minimum voltage and ageing state
Three-dimensional data table, voltage change ratio, temperature and voltage limits tables of data, ageing state and aging coefficient tables of data
Deng；
Temperature sensor 5 is used for detecting battery temp, and is transferred to processor 3 in analog quantity mode.
When processor 3 numeral input port signal is low level, illustrate that starting motor does not works；During for high level,
Illustrate that starting motor is in operating condition.
Described processor 3 is independent processor, or merges with other processor on automobile, such as electromotor control
Device processed, idling start-stop controller, this example is idling start-stop controller.
Fig. 3 is the monitoring method schematic block diagram of the battery condition of the present invention, including ageing management module 6, stores
Battery electric quantity judge module 7 and rate of change computing module 8；Battery condition monitoring method operates in processor 3
In；
Ageing management module 6 judges accumulator ageing state according to start-up course Voltage Drop；
Accumulator electric-quantity judge module 7 is main according to battery tension and voltage change ratio electricity current to accumulator
Amount the most enough judges, and will determine that result exports to idling start-stop controller；
In the case of accumulator electric-quantity is enough, if other idle stop condition meets, then idling start-stop controller stops
Only electromotor；If accumulator electric-quantity is very few, even if then other idle stop condition meets, idling start-stop controller
Also electromotor can be made to keep operating；
Rate of change computing module 8 calculating accumulator voltage change ratio, output is to accumulator electric-quantity judge module 7
Carry out accumulator electric-quantity judgement；
The motor status signal that starts needed for ageing management module 6 is gathered startup by the digital input port of processor 3
The power supply signal of motor obtains；Low level represents that startup motor does not works, and high level represents startup motor work.
A kind of monitoring method for idling start-stop system to battery condition of the present invention, this monitoring method
Using the monitoring device of above-mentioned battery condition, its step is as follows:
(1) accumulator ageing state judges；At engine startup, according to starting initial time
Minimum voltage in battery tension and start-up course estimates accumulator ageing state；
Accumulator ageing state has reacted the degree of aging of accumulator, is to start initial time battery tension
With the function of minimum voltage in start-up course.Relation between above-mentioned factor is tried by following automobile starting
Test and obtain: using different ageing state, the accumulator of different state-of-charges to start electromotor, record starts
During battery tension delta data, and extract and start the battery tension of initial time and startup
The minimum voltage of process, the accumulator ageing state corresponding with test data constitutes three-dimensional data table and (sees
Fig. 4), this tables of data is stored in memorizer 4, and battery condition monitoring policy can be according to actual startup
Initial voltage and the minimum voltage of start-up course, obtained the old of accumulator by this three-dimensional data table by tabling look-up
Change state；
(2) calculating accumulator voltage change ratio；When electromotor is in idle stop state, store
Cell voltage rate of change calculates, and when other state, does not calculate battery tension rate of change；
Owing to battery tension changes over relatively slow, and when load current changes, it is easily generated fluctuation,
So, adopt calculating accumulator voltage change ratio with the following method:
First with the bigger sampling period, as used the sampling period of 1 second that battery tension is carried out continuously
Multiple battery tensions of continuous sampling, such as 60 times, are then processed by multiple repairing weld as the following formula:
Wherein, i and k is the sampling period, and N is sampling number；In actual application, for improving data profit
By rate, sampling period i with k uses the different cycles, and general satisfaction requires as follows:
K=i × N
After being calculated average treatment voltage, battery tension rate of change can be calculated as follows:
Voltage (k-1) after voltage (k)-average treatment after battery tension rate of change (k)=average treatment；
(3) judgement that accumulator electric-quantity is the highest；According to battery tension, battery tension rate of change and perseverance
The pressure charging interval judges that accumulator electric-quantity is the highest；When start-stop enables invalidating signal, to accumulator electric-quantity whether
Abundant judge；Meet at the same time when requiring as follows, then judge that accumulator electric-quantity is abundant:
1. battery tension is more than rated voltage；2. battery tension rate of change is more than 0；3. before
1. the persistent period and the most simultaneously met in face is more than the limit value set；
1. it is to ensure that accumulator is entered constant-voltage charge state, i.e. accumulator electric-quantity by constant-current charge
Increasing, charging current decreases so that generator operation is in rated voltage；
2. it is to ensure that accumulator is in charge and non-discharged state；
3. it is to ensure that accumulator has enough constant voltage charging times so that accumulator electric-quantity reaches relatively
Many states；Charging interval limit value is the function of battery temp, and relation data between the two is with two dimension
The form of tables of data is stored in memorizer 4, uses for battery condition monitoring algorithm；This tables of data
Can be obtained by following test:
Under condition of different temperatures, first accumulator carrying out constant-current charge, voltage to be charged reaches generating
After machine rated voltage, switch to constant-voltage charge, needed for recording the state-of-charge that accumulator reaches setting
Constant voltage charging time, i.e. can get the relation of condition 3. middle charging interval limit value and battery temp；
(4) judgement that accumulator electric-quantity is the lowest；According to battery tension, battery tension rate of change
Judge that accumulator electric-quantity is the lowest with ageing state；Enable signal in start-stop effective, and electromotor is in idle
During speed stopped status, judging accumulator electric-quantity is the most very few, concrete decision method is as follows: if storing
Cell voltage is less than limit value, then judge that accumulator electric-quantity is very few；Above-mentioned limit value computing formula is as follows:
Limit value=basis limit value × aging coefficient
Wherein, basis limit value is obtained by test by new accumulator, is the letter of battery temp and voltage change ratio
Number, between relation be stored in memorizer 4 with the form of three-dimensional data table, for battery condition supervise
Survey method uses；Basis limit value can be obtained by following test with the relation of temperature, voltage change ratio:
Use new accumulator, under condition of different temperatures, with different discharge currents, accumulator is carried out perseverance
Banish electricity, record voltage the most in the same time and state-of-charge；Then for the state-of-charge point set, carry
Take out voltage change ratio and the voltage in corresponding moment therewith；Finally, binding tests temperature data is the most available
Basis limit value three-dimensional data table, aging coefficient is the function of ageing state, after accumulator is aging, actual appearance
Amount reduces, so under accumulator capacity fixing situation, the voltage of aging accumulator is higher than new accumulator；Always
Change coefficient and be the voltage of aging accumulator and the ratio of new accumulator voltage, the most serious aging electric power storage
Pond, this ratio is the biggest, thus obtains the two-dimensional data table of aging coefficient and ageing state, equally, this number
It also is stored in memorizer 4 according to table；
(5) idling start-stop enables the judgement of signal；Electricity according to accumulator judges, if it is determined that
For accumulator electric-quantity low (very few), then start-stop enables invalidating signal, the most no matter other idle stop bar
Whether part meets, and idling start-stop controller all should make electromotor be in operating condition；If it is determined that be accumulator
Electricity is high (enough), then in the case of other idle stop condition meets, and idling start-stop controller meeting
Stop electromotor；
Idling start-stop enables the decision logic of signal: if current idling start-stop enables signal effectively, and accumulator
Electricity is low, then idling start-stop enables invalidating signal；If current idling start-stop enables invalidating signal, and storage battery
Amount height, then idling start-stop enable signal is effective；Current idling start-stop is otherwise kept to enable signal condition constant.
Fig. 5 is the flow chart of accumulator ageing state determination methods.Due to engine starting process Voltage Drop speed
Degree quickly, for Voltage Drop process accurately being detected, run by the accumulator ageing state determination methods shown in Fig. 5
Speed, the calculating cycle is 0.1ms.
Accumulator ageing state determination methods, from the beginning of the first initialization module 61, initializes in memorizer 4
Initialize a memory space, for storing initial voltage and the minimum voltage of start-up course；
After initialization completes, enter the first high level module 62, judge whether starting electromotor, sentence
Disconnected method is as follows: if starting motor status signal is the first high level, illustrate to start motor in running order,
Then enter the first collection voltage module 63, gather start-up course initial voltage；If starting motor status signal it is
Low level, illustrates that starting motor does not works, then return the first high level module 62, enter next cycle；The
One gathers voltage module 63 gathers battery tension, and is stored in memorizer 3, and this voltage is and opens
Dynamic initial voltage, uses the minimum voltage in this voltage initialization memorizer 3 simultaneously；
After collection battery tension completes, enter the second high level module 65, sentence starting motor status
Disconnected: if starting motor status signal is high level, to start motor work, startup minimum voltage need to be detected, then enter
Enter the second collection voltage module 66；If starting motor status signal is low level, starts motor and stop, explanation
Start-up course terminates, then enter aging judge module 64；
After second collection voltage module 66 completes battery tension collection, enter the low module of voltage 67, will gather
Battery tension and memorizer 3 in the minimum voltage of record compare: if the battery tension gathered is less than
Minimum voltage in memorizer 3, then enter and update minimum voltage module 68；Otherwise, the second high level is returned
Module 65, continues to judge starter motor state.Update minimum voltage module 68 and use the accumulator gathered
After minimum voltage in voltage more new memory 3, return the second high level module 65.Aging judge module 64
Read the startup initial voltage of record, start-up course minimum voltage, initial voltage, start-up course in memorizer 3
Minimum voltage and ageing state three-dimensional data table, use the method linearly looking into value to obtain the aging shape of current accumulator
State, and export to accumulator electric-quantity judge module 7.Accumulator ageing state is that 0 expression accumulator is the most aging,
Be 1 expression accumulator be new accumulator.
Fig. 6 is the flow chart of the battery tension rate of change computational methods of the present invention.Rate of change computing module 8
Carrying out battery tension rate of change calculating, required engine status signal is exported by idling start-stop controller, uses
Idle stop state whether it is in difference electromotor.
Battery tension rate of change computational methods, from the beginning of the second initialization module 81, initialize content and include:
A space is initialized, for memory counter, voltage accumulated value, voltage change ratio, average in memorizer 4
Magnitude of voltage；The intervalometer of initialization processor 3.Enter Active Timer module 82 after when completing, reset
Intervalometer in processor 3, and activate.Timer time is judged by judge module 83: work as intervalometer
When time reaches 1 second, then enter voltage accumulation module 84；Otherwise return module 83, when continuing intervalometer
Between judge.Voltage accumulation module 84 gathers battery tension, and accumulates it storage in memorizer 4
Voltage accumulated value, simultaneously by memorizer 4 enumerator increase by 1.Judge module 85 is entered after completing, right
Memorizer 4 Counter value judges: if Counter Value is 30, then enter rate of change computing module 86 and count
Calculate voltage change ratio；Otherwise, return Active Timer module 82 and reactivate intervalometer.Rate of change calculates mould
Block 86 rate of change calculates and need to complete to operate as follows:
(1) according to following formula calculating average voltage level:
(2) according to following formula calculating voltage change ratio:
Calculate the average voltage level-calculating average voltage level of voltage change ratio=memorizer 4 storage；
(3) average voltage level calculated in average voltage level more new memory 4 is used.
Owing to battery tension changes over relatively slow, especially in the case of discharge current is less, above-mentioned intervalometer
The selection Ying Yineng of limit value sum counter limit value detects that battery tension is changed to benchmark.In the inconspicuous feelings of voltage
Under condition, voltage sample period and the cycle of rate of change calculating can be increased.
Complete to enter idle stop module 87 after rate of change calculates engine condition is judged: if electromotor
It is in idle stop, then enters rate of change no more than 0 module 88 and further calculating voltage change ratio is sentenced
Disconnected；Otherwise, enter renewal rate of change module 89 and be changed rate renewal.During due to idle stop, accumulator
Certainly being in discharge condition, voltage change ratio should be less than 0.If voltage change ratio is more than 0, should be to be become by load
Change the interference caused.So rate of change is judged by rate of change no more than 0 module 88: if rate of change is not
More than 0, then enter new change rate module 89 and update voltage change ratio；Otherwise, voltage change ratio is not carried out
Update, be directly entered counter resets module 90.Counter resets module 90 uses the voltage change ratio calculated
Voltage change ratio in more new memory 4 also exports and carries out accumulator electric-quantity to accumulator electric-quantity judge module 7 and sentence
Disconnected.After counter resets module 90 is to the Counter Value of storage resets in memorizer 4, returns to activate and determine
Time device module 82 start new voltage change ratio and calculate process.
Fig. 7 is the flow chart that the accumulator electric-quantity judge module 7 of the present invention judges accumulator electric-quantity, this flow process
The calculating cycle be 10ms.Accumulator electric-quantity judge module 7 exports idling start-stop and enables signal, and 0 represents idling
Start-stop is invalid, even if now other idle stop condition meets, does not the most allow idling start-stop controller to stop starting
Machine；1 represents that idling start-stop is effective, and when i.e. other idle condition condition meets, idling start-stop controller can stop
Electromotor.
Accumulator electric-quantity determination methods is from the beginning of the 3rd initialization module 71, and initialization procedure includes: initialize
The intervalometer of processor 3；Initialize memorizer 4 space to be used for storing idling start-stop enable signal.Complete initial
Enter voltage ＞ 12.3V module 72 after change, initial idling start-stop is enabled signal and judges, it is judged that method
As follows:
If battery tension > 12.3V, then enter the first effective module of idling start-stop 74 and make idling start-stop effective；
Otherwise entering the invalid module of idling start-stop 73 makes idling start-stop invalid.Power on the initial stage just, can be approximately considered
Battery tension is open-circuit voltage, therefore, it can according to setting state-of-charge correspondence battery open-circuit voltage conduct
The initial idling of voltage ＞ 12.3V module 72 enables the battery tension limit value that signal judges.First idling start-stop
Effectively the idling start-stop in module 74 more new memory 4 enables signal is 1, and exports to idling start-stop control
Device.It is 0 that idling start-stop enables signal with or without the idling start-stop in module 73 more new memory 4, and output is given
Idling start-stop controller.Complete to initialize judge after enter the second effective module of idling start-stop 75 to current idle
Speed start-stop enabled state judges, it is judged that method is as follows: idling start-stop is effective, then enter idle stop module
Engine condition is judged by 76 further；Otherwise, enter electricity high module 78 and judge that accumulator electric-quantity is
No abundant, enable signal with the idling start-stop in more new memory 4.Due to when electromotor operates, it is not necessary to
The state carrying out accumulator electric-quantity not enough judges, only at idle stop, under battery discharging state, for
Ensure startup ability next time and electric equilibrium, just need to accumulator electric-quantity whether deficiency judges.So idling
The determination methods shutting down module 76 is as follows: if being in idle stop state, then enter electricity low module 77 to storage
Battery electric quantity is the lowest to be judged；Otherwise, return the second effective module of idling start-stop 75 to start the next one and follow
Ring.The determination methods of the low module of electricity 77 is: if battery tension is less than limit value, then accumulator electric-quantity is described
Too low, then enter the invalid module of idling start-stop 73 and make idling start-stop invalid；Otherwise return the second idling start-stop effective
Return module 75 and start next circulation.The low module of electricity 77 judges that the most too low voltage limits of electricity is by following formula
It is calculated:
Limit value=basis limit value × aging coefficient.
Wherein, basis limit value is by battery temp and voltage change ratio, by the accumulator of storage in memorizer 4
Temperature, voltage change ratio and voltage limits three-dimensional data table are obtained by linear interpolation.Aging coefficient is according to module
The ageing state of 6 outputs, obtains according to the ageing state in memorizer 4 and aging coefficient 2-D data linear interpolation
Arrive.The method that electricity high module 78 carries out accumulator electric-quantity height judgement is as follows: if meet following requirement simultaneously:
(1) battery tension > 14.3V, (two) battery tension rate of change is not less than 0, (three) condition ()
(2) time simultaneously met was more than 20 minutes, then judge that accumulator electric-quantity is high, enter the first idling and rise
Stopping effective module 74 makes idling start-stop effective；Otherwise, return the second effective module of idling start-stop 75 and start next
Individual circulation.Battery tension limit value in above-mentioned condition () is rated voltage.Condition (three) is wanted
The time limit value asked, determined according to the time needed for accumulator constant-voltage charge to setting state-of-charge.
Claims (1)
1. for an idling start-stop system monitoring method to battery condition, the accumulator that this monitoring method uses
The monitoring device of state, the memorizer being connected with processor including processor；One end of one voltage sensor with
Described processor connects, and the other end of voltage sensor is connected with the positive pole of accumulator, and this voltage sensor is used for
Detection battery tension；One end of one temperature sensor is connected with the AD mouth of described processor, temperature sensor
The other end is connected with the positive pole of accumulator；This temperature sensor is used for measuring battery temp, is turned by temperature signal
Turn to analog quantity, the AD mouth of processor be acquired；The digital input port of described processor receives and starts electricity
The status signal of machine, is started motor status signal and is obtained by the power supply signal of detection startup motor；Described process
Device is independent processor, or merges with the engine controller on automobile, idling start-stop controller；
Monitoring step is as follows:
(1) accumulator ageing state judges；At engine startup, according to the storage battery starting initial time
Minimum voltage in pressure and start-up course estimates accumulator ageing state；
(2) calculating accumulator voltage change ratio；When electromotor is in idle stop state, carry out battery tension
Rate of change calculates, and when other state, does not calculate battery tension rate of change；
Owing to battery tension changes over relatively slow, and when load current changes, it is easily generated fluctuation, so,
Adopt calculating accumulator voltage change ratio with the following method:
First battery tension is carried out continuous 60 samplings, then multiple battery tensions of continuous sampling is pressed
Formula processes:
Wherein, i and k is the sampling period, and N is sampling number；In actual application, for improving data user rate, adopt
Sample cycle i with k uses the different cycles, and general satisfaction requires as follows:
K=i × N
It is calculated voltage after average treatment, can be calculated as follows battery tension rate of change:
Voltage (k-1) after voltage (k)-average treatment after battery tension rate of change (k)=average treatment；
(3) judgement that accumulator electric-quantity is the highest；Fill according to battery tension, battery tension rate of change and constant voltage
The electricity time judges that accumulator electric-quantity is the highest；When start-stop enables invalidating signal, enough to accumulator electric-quantity
Judge more；Meet at the same time when requiring as follows, then judge that accumulator electric-quantity is abundant:
1. battery tension is more than rated voltage；2. battery tension rate of change is more than 0；3. before 1. and
The persistent period the most simultaneously met is more than the limit value set；
1. it is to ensure that accumulator is entered constant-voltage charge state, i.e. accumulator electric-quantity by constant-current charge and increases, fills
Electricity electric current decreases so that generator operation is in rated voltage；
2. it is to ensure that accumulator is in charge and non-discharged state；
3. it is to ensure that accumulator has enough constant voltage charging times so that accumulator electric-quantity reaches more shape
State；Charging interval limit value is the function of battery temp, and relation data between the two is with the shape of two-dimensional data table
Formula stores in memory, uses for battery condition monitoring method；This tables of data can be by testing as follows
Arrive:
Under condition of different temperatures, first accumulator carrying out constant-current charge, voltage to be charged reaches the specified electricity of electromotor
After pressure, switch to constant-voltage charge, record accumulator and reach the constant voltage charging time needed for the state-of-charge set,
I.e. can get the relation of condition 3. middle charging interval limit value and battery temp；
(4) judgement that accumulator electric-quantity is the lowest；According to battery tension, battery tension rate of change and aging shape
State judges that accumulator electric-quantity is the lowest；Signal is enabled effective in start-stop, and when electromotor is in idle stop state,
Judging accumulator electric-quantity is the most very few, concrete decision method is as follows: if battery tension is less than limit value,
Then judge that accumulator electric-quantity is very few；Above-mentioned limit value computing formula is as follows:
Limit value=basis limit value × aging coefficient
Wherein, basis limit value is obtained by test by new accumulator, is the function of battery temp and voltage change ratio,
Between relation store in memory with the form of three-dimensional data table, make for battery condition monitoring method
With；Basis limit value can be obtained by following test with the relation of temperature, voltage change ratio:
Use new accumulator, under condition of different temperatures, with different discharge currents, accumulator carried out constant-current discharge,
Record voltage the most in the same time and state-of-charge；Then for the state-of-charge point set, extract corresponding therewith
The voltage change ratio in moment and voltage；Finally, binding tests temperature data i.e. available basis limit value three-dimensional data
Table, aging coefficient is the function of ageing state, and after accumulator is aging, actual capacity reduces, so accumulator is held
Under amount fixing situation, the voltage of aging accumulator is higher than new accumulator；Aging coefficient is the electricity of aging accumulator
Pressure and the ratio of new accumulator voltage, the most serious aging accumulator, this ratio is the biggest, thus obtains aging system
Number and the two-dimensional data table of ageing state, equally, this tables of data also is stored in memorizer；
(5) idling start-stop enables the judgement of signal；Electricity according to accumulator judges, if it is determined that be accumulator
Electricity is low, then start-stop enables invalidating signal, and the most whether other idle stop condition meets, idling start-stop
Controller all should make electromotor be in operating condition；If it is determined that be that accumulator electric-quantity is high, then at other idle stop
In the case of condition meets, idling start-stop controller can stop electromotor；
Idling start-stop enables the decision logic of signal: if current idling start-stop enables signal effectively, and accumulator electric-quantity
Low, then idling start-stop enables invalidating signal；If current idling start-stop enables invalidating signal, and accumulator electric-quantity is high,
Then idling start-stop enable signal is effective；Current idling start-stop is otherwise kept to enable signal condition constant.
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| CN104035046A (en) * | 2014-06-11 | 2014-09-10 | 长沙勤凯机电科技有限公司 | Vehicle-mounted storage battery online monitoring system |
| CN105197013B (en) * | 2014-06-30 | 2017-11-21 | 比亚迪股份有限公司 | Startup control method, device and the vehicle of vehicle |
| DE102016207571A1 (en) * | 2016-05-03 | 2017-11-09 | Robert Bosch Gmbh | Diagnostic method, operating method for a battery assembly, method of operating a device, control unit and device |
| CN105971749B (en) * | 2016-06-29 | 2018-10-23 | 广西玉柴机器股份有限公司 | A kind of engine idle optimization control method |
| US10400733B2 (en) | 2017-06-02 | 2019-09-03 | Ford Global Technologies, Llc | Vehicle battery control systems and method |
| CN109143095B (en) * | 2018-08-27 | 2019-08-09 | 江苏盖睿健康科技有限公司 | A method of improving electrical measurement accuracy |
| CN109507597A (en) * | 2019-01-04 | 2019-03-22 | 清华四川能源互联网研究院 | Lithium battery performance estimating method and device |
| CN111817417B (en) * | 2019-04-12 | 2023-04-18 | 长城汽车股份有限公司 | Charging method and device of lead-acid storage battery for 12V start and stop and vehicle |
| JP7079223B2 (en) * | 2019-05-23 | 2022-06-01 | 本田技研工業株式会社 | Battery status determination system, in-vehicle device, server, battery status determination method, and program |
| CN111332297B (en) * | 2020-02-17 | 2022-05-03 | 宁波吉利汽车研究开发有限公司 | Automobile starting system and method based on intelligent management of low-voltage storage battery |
| CN112697437A (en) * | 2020-11-30 | 2021-04-23 | 潍柴动力股份有限公司 | Engine start failure detection method, engine start failure detection device, electronic apparatus, and medium |
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