CN106602622A - Pre-charging control method and system of electromobile - Google Patents
Pre-charging control method and system of electromobile Download PDFInfo
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- CN106602622A CN106602622A CN201510671774.1A CN201510671774A CN106602622A CN 106602622 A CN106602622 A CN 106602622A CN 201510671774 A CN201510671774 A CN 201510671774A CN 106602622 A CN106602622 A CN 106602622A
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- charging
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Abstract
The invention provides a pre-charging control method and system of electromobile. The method comprises the following steps that before pre-charging, a predicted temperature value of a pre-charging resistor after completion of pre-charging is predicted, and whether the predicted temperature value exceeds a temperature threshold is determined; when the predicted temperature value exceeds the temperature threshold of the pre-charging resistor, pre-charging is forbidden; and when the predicted temperature value does not the preset temperature threshold, pre-charging is started. In the charging process, whether a present pre-charging voltage value accords with a predetermined pre-charging voltage curve is monitored in real time, and when the present pre-charging voltage value does not accord with the predetermined pre-charging voltage curve, pre-charging is stopped. According to the method, heat prediction is carried out on the pre-charging resistor to determine whether pre-charging can be implemented, and the pre-charging voltage is monitored to predict whether pre-charging can succeed, so that measures can be taken in advance. The method can be used to avoid waste caused by useless pre-charging time, improve the pre-charging efficiency, ensure that pre-charging is completed successfully within shortest time, shorten the high-voltage connection time, and improve the driving experience.
Description
Technical field
The present invention relates to electric automobile field, specifically a kind of electric vehicle pre-charging control method and
System.
Background technology
It is with the continuous intensification of global energy crisis, the exhausted and atmospheric pollution increasingly of petroleum resources, complete
The ball harm that the temperature rises aggravation, energy-conservation and reduction of discharging are the main directions of future automobile technology development.Japan
Toyota Company takes the lead in developing hybrid vehicle Prius, has opened the epoch prelude of electric automobile.Electricity
Electrical automobile as a new generation the vehicles, energy-saving and emission-reduction, reduce the mankind to traditional fossil energy according to
Bad aspect possesses the incomparable advantage of orthodox car.Since 2009, Chinese Government is intensive to put into effect
Encourage the policies and measures of electric automobile and relevant industries development, research and development and industrialization of the enterprise to electric automobile
Input is significantly increased.
Electric automobile works so as to reach the mesh for travelling electric motor car by driven by energy motor of electrokinetic cell
, by motor controller controls, the inside of electric machine controller has many to be used for for the work of motor in electric automobile
Filtering and the bulky capacitor of voltage stabilizing, the positive pole of bulky capacitor are connected by switch with the positive pole of accumulator.In vehicle
Other high pressure point devices, such as DC/DC changers, adnexa electric machine controller etc. equally have front end electricity
Hold.When switch is directly opened, accumulator moment can be charged to electric capacity with very big electric current, its impact meeting
Affect the life-span of electric capacity and the reliability of controller.
In order to ensure the safety of system, when battery system accesses the high tension loop of power system of electric automobile,
Need to enter line precharge to high tension loop.Precharge is not in any case, can to successfully complete.Mesh
Before, by precharge, the judgement to being pre-charged success or not mainly terminates whether rear detection voltage reaches the phase
Prestige value, is pre-charged if reaching successfully, otherwise fails.This mode is just known after precharge terminates
Whether precharge is successful, when precharge failure, can only reattempt again precharge, and this will expend longer
Time, cause preliminary filling poor electrical efficiency.Therefore, in order to improve precharge success rate, it is necessary to pre-
Charging process is controlled.
The content of the invention
For this purpose, the technical problem to be solved is electric vehicle pre-charging of the prior art
Inefficiency, solves the problem so as to propose a kind of electric vehicle pre-charging control method and system.
To solve above-mentioned technical problem, the present invention provides a kind of electric vehicle pre-charging control method, bag
Include following steps：
Before precharge starts, preliminary filling in the precharging circuit of the electric automobile after the completion of prediction precharge
The predicting temperature values of resistance；
Judge whether the predicting temperature values exceed the temperature threshold of preliminary filling resistance set in advance；
When the temperature threshold more than preliminary filling resistance, forbid starting this precharge；
When less than predetermined temperature threshold value, start precharge.
Preferably, preliminary filling resistance in the precharging circuit of the electric automobile after the completion of the prediction is pre-charged
The step of predicting temperature values, includes：
Calculate the difference of the voltage of the voltage and load circuit of the battery system of the electric automobile；
The estimating temperature value added of the preliminary filling resistance after the completion of being pre-charged according to the difference；
After the completion of precharge is calculated according to the original temperature and the estimating temperature value added of the preliminary filling resistance
The predicting temperature values of the preliminary filling resistance.
Preferably, it is described start precharge the step of after include：
Judge whether pre-charge process is normal, predict this final success of precharge；
If can successfully if continue charge, if can not successfully if stop this charging.
Preferably, judge whether pre-charge process is normal, predict the step of this final success of precharge
Suddenly, including
Whether the current precharge voltage value of real-time monitoring meets the pre-charge voltage curve of advance demarcation；
When the pre-charge voltage curve of advance demarcation is not met, then judge that this precharge cannot be successful.
Preferably, it is described stop this precharge the step of after include：
Obtain actual temperature value of the preliminary filling resistance in the stop timing.
Preferably, the acquisition preliminary filling resistance is wrapped the step of the actual temperature value of the stop timing
Include：
The actual current value of the preliminary filling resistance is flow through in detection pre-charge process；
Described preliminary filling resistance is calculated according to the actual current value and this, and this is pre- described precharge time
The heat actually produced in charging interval；
According to the actual heat Calculation for producing, preliminary filling resistance is within described this precharge time
Actual temperature value added；
The preliminary filling resistance is calculated according to the initial temperature and the actual temperature value added of the preliminary filling resistance
In the actual temperature value of the stop timing.
Preferably, it is described obtain the preliminary filling resistance the step of actual temperature value of the stop timing it
After include：
Ith, before next time, precharge started, if the time interval stopped with this precharge is less than pre-
If time threshold, then using the preliminary filling resistance this precharge be stopped the actual temperature value at moment as
The initial temperature of preliminary filling resistance during prediction precharge next time；If the time interval is more than described pre-
If time threshold, then the actual temperature value at moment is stopped in this precharge with the preliminary filling resistance and is deducted
The initial temperature of preliminary filling resistance when preliminary filling resistance temperature reduced value is prediction precharge next time；
IIth, the predicted temperature of the preliminary filling resistance after the completion of precharge next time is predicted according to the initial temperature
Value；
IIIth, after the completion of judging to be pre-charged the next time, whether the predicting temperature values of the preliminary filling resistance exceed institute
State default temperature threshold；
IVth, when more than the default temperature threshold, then forbid this to charge, repeat after time delay
State I-III step and recalculate predicting temperature values, until predicting temperature values are less than the default temperature threshold
Start next precharge during value again；When less than the default temperature threshold, then start next preliminary filling
Electricity.
Additionally, the present invention also provides a kind of electric vehicle pre-charging control system, including：
First prediction module, for, before precharge starts, predicting the electronic vapour after the completion of precharge
The predicting temperature values of preliminary filling resistance in the precharging circuit of car；
First judge module, for judging whether the predicting temperature values exceed preliminary filling resistance set in advance
Temperature threshold；
Disabled module, for when the temperature threshold of preliminary filling resistance is exceeded, forbidding starting this precharge；
Precharge starts module, for, when less than predetermined temperature threshold value, starting precharge.
Preferably, the system also includes：
Charging process monitoring module, judges whether pre-charge process is normal, predicts this final energy of precharge
No success；
Charging performing module, if can successfully if continue charge, if can not successfully if stop this charging.
Preferably, charging process monitoring module also includes：
Whether detection sub-module, meet the preliminary filling of advance demarcation for the current precharge voltage value of real-time monitoring
Piezoelectric voltage curve；
Prediction submodule, for when the pre-charge voltage curve of advance demarcation is not met, then judging this
Precharge cannot be successful.
Preferably, the system also includes：
Actual temperature value obtains module, for obtaining actual temperature of the preliminary filling resistance in the stop timing
Angle value.
Preferably, the actual temperature value obtains module and includes：
Detector unit, for detecting the actual current value that the preliminary filling resistance is flow through in pre-charge process；
Heat Calculation unit, for calculating described pre- according to the actual current value and this precharge time
The heat that resistance of charging actually was produced within described this precharge time；
Actual temperature value added computing unit, for the preliminary filling according to the actual heat Calculation for producing
Actual temperature value added of the resistance within described this precharge time；
Actual temperature value computing unit, for the initial temperature according to the preliminary filling resistance and the actual temperature
Degree value added calculates actual temperature value of the preliminary filling resistance in the stop timing.
The above-mentioned technical proposal of the present invention has advantages below compared to existing technology：
(1) in the electric vehicle pre-charging control method and system of the present invention, by predicting precharge
After the completion of preliminary filling resistance predicting temperature values, and compare with the temperature threshold of preliminary filling resistance, predict this
Secondary charging success, and then whether decision-making starts this precharge.Predicting that this precharge can not
When successful, forbid this to be pre-charged, and when predicting that this energy that charges is successful, just start this charging,
The waste of insignificant precharge time is not only avoided, preliminary filling electrical efficiency is improved, and is shortened total height
The pressure Connection Time, lift driving experience.
(2) in the electric vehicle pre-charging control method and system of the present invention, by precharge
During monitor the pre-charge voltage curve whether current pre-charge voltage meets advance demarcation, predict
This charging success, so as to whether decision-making stops this precharge in pre-charge process.Pre-
In charging process, it is predicted that when this precharge can not be successful, stop this precharge, can avoid
The waste of insignificant precharge time, so as to further improve preliminary filling electrical efficiency, shortens total high pressure
Connection Time, lift driving experience.
(3) in the electric vehicle pre-charging control method and system of the present invention, if precharge failure,
Before starting precharge trial next time, it is and then to enter line precharge, then with the preliminary filling resistance at this
The secondary actual temperature value for being stopped the moment that is pre-charged is used as preliminary filling resistance during prediction precharge next time
Initial temperature；If before next time, precharge started, certain interval of time does not carry out preliminary filling,
Preliminary filling resistance does not produce heat, has radiated, then need to be pre-charged at this with the preliminary filling resistance
The actual temperature value for being stopped the moment deducts preliminary filling resistance temperature reduced value for prediction precharge next time when institute
The initial temperature of preliminary filling resistance is stated, is so entered the predicting temperature values prediction of line precharge resistance, is improved to pre-
Charge and hinder the accuracy of temperature prediction.
(4) in the electric vehicle pre-charging control method and system of the present invention, by predicting that next time is pre-
The predicting temperature values of preliminary filling resistance after charging complete, and compare with the temperature threshold of preliminary filling resistance, come pre-
Next charging success is surveyed, and then whether decision-making starts next precharge, the program can not only be kept away
Exempt from the waste of insignificant precharge time, and further improve preliminary filling electrical efficiency, shorten total height
The pressure Connection Time, lift driving experience.
Description of the drawings
In order that present disclosure is more likely to be clearly understood, below according to the concrete reality of the present invention
Apply example and combine accompanying drawing, the present invention is further detailed explanation, wherein
Fig. 1 is the schematic flow sheet of the electric vehicle pre-charging control method of the embodiment of the present invention 1；
Fig. 2 is the schematic diagram of the pre-charge voltage curve of the advance demarcation of the embodiment of the present invention 1；
Fig. 3 is the structural representation of the electric vehicle pre-charging control system of the embodiment of the present invention 2.
Specific embodiment
In order that those skilled in the art more fully understand present disclosure, below in conjunction with the accompanying drawings and
Embodiment is described in further detail to technical scheme provided by the present invention.
Embodiment 1：
Fig. 1 shows a kind of electric vehicle pre-charging control method of the embodiment of the present invention 1, the method bag
Include following steps：
The predicting temperature values of preliminary filling resistance after the completion of S1, prediction precharge.Before precharge starts, in advance
The predicting temperature values of preliminary filling resistance in the precharging circuit of the electric automobile after the completion of being pre-charged are surveyed, specifically may be used
To comprise the following steps：
First, calculate the difference of the voltage of the voltage and load circuit of the battery system of the electric automobile.
For example, it is assumed that the voltage of the battery system of the electric automobile is V1, the load circuit of the electric automobile
Voltage V2, then, and difference V0 be V0=| V1-V2 |.
Secondly, the estimating temperature value added of the preliminary filling resistance after the completion of being pre-charged according to the difference.
The method that experiment can be passed through, sets up the difference of the voltage of the voltage and the load circuit of the battery system
It is worth the corresponding table with the estimating temperature value added of the preliminary filling resistance.In the table, for difference each described
Value, the estimating temperature value added all with the preliminary filling resistance after the completion of a precharge are corresponded to therewith.Cause
And, tabled look-up according to the current difference, it is possible to obtain the preliminary filling resistance after the completion of precharge
Estimating temperature value added.
Finally, precharge is calculated according to the original temperature and the estimating temperature value added of the preliminary filling resistance
After the completion of the preliminary filling resistance predicting temperature values.Before precharge starts for the first time, the preliminary filling resistance
Original temperature be the battery system ambient temperature, the battery can be gathered by temperature sensor
The ambient temperature of system.After the completion of precharge, the predicting temperature values of the preliminary filling resistance are the precharge
The original temperature of resistance is plus obtained by the estimating temperature value added.
S2, judge that whether the predicting temperature values exceed the temperature threshold of preliminary filling resistance set in advance.When
More than preliminary filling resistance set in advance temperature threshold when, execution step S3；When less than set in advance
During the temperature threshold of preliminary filling resistance, execution step S4.The temperature threshold, is the preliminary filling resistance energy
The ultimate value of enough bearing temperatures, will cause the preliminary filling resistance to be burned more than the temperature threshold, so as to
Necessarily cause precharge failure.The temperature threshold can be obtained by experiment.
S3, forbid start this precharge.As the predicting temperature values are more than described set in advance pre-
Charge the temperature threshold for hindering, if carrying out this precharge, it is precharge failure that can predict result,
Therefore this is forbidden to be pre-charged.
S4, start precharge.With step S3 accordingly, as the predicting temperature values are not above institute
The temperature threshold of preliminary filling resistance set in advance is stated, this precharge is carried out, can be predicted and be not in
The too high situation for causing to be pre-charged failure of temperature, therefore precharge can be started.
In the said method of the present invention, by the predicting temperature values of preliminary filling resistance after the completion of prediction precharge,
And compare with the temperature threshold of preliminary filling resistance, this charging success is predicted, and then whether decision-making opens
Beginning, this is pre-charged.When predicting that this precharge can not be successful, this is forbidden to be pre-charged, and in prediction
When this energy that charges is successful, just starts this charging, not only avoid the waste of insignificant precharge time,
Preliminary filling electrical efficiency is improved, and shortens total high pressure Connection Time, lift driving experience.
As preferred embodiment, can include after S4 the step of start precharge：
S5, judge that pre-charge process is whether normal, predict this final success of precharge.
Should during, judge whether normal mode can have various to pre-charge process, as monitoring current,
Whether voltage, temperature etc. are normal, predict that this charging can be successful by the data that monitor, if
Electric current is excessive, too small, or the excessively high abnormal conditions of overtension, too low, temperature occur, then mean
This charging is difficult successfully, by whether normally judging preliminary filling process, can predict that this charging can be into
Work(.
As a kind of concrete implementation mode, such as：
Whether the current precharge voltage value of real-time monitoring meets the pre-charge voltage curve of advance demarcation.
After charging starts, it should first judge current precharge progress, it is determined that current precharge is from precharge
What the where of curve proceeded by, because the precharge of once failure may be carried out before, or just
Just lower electricity goes up electricity etc., or other reasonses, such as hybrid power etc. once more.
Pre-charge pressure is not to proceed by from voltage 0V, therefore first need to judge to be pre-charged from the beginning of where,
And according to the zone of reasonableness of each moment pre-charge voltage of default curve calculated for subsequent.Monitoring was pre-charged
Journey, is gathered pre-charge pressure, and is compared with the voltage threshold for calculating, beyond zone of reasonableness, then sentenced
Fixed precharge may not be carried out according to normal pre-charge curve, and this precharge may failure.Precharge
Voltage higher than the upper limit for calculating or is able to correspond to different failure feelings less than the lower limit for calculating
Condition.During actual execution, single pre-charge voltage exceeds reasonable threshold value, and this precharge is interrupted in triggering,
But the judgement through repeatedly exceeding reasonable threshold value, just this precharge of triggering interruption.The problem of single,
The transient fluctuation for being likely to be collection or voltage causes, and continuous several times exceed reasonable threshold value, it is possible to sentence
Fixed, precharge is not carried out according to pre-charge pressure reasonable curve.
When the pre-charge voltage curve of advance demarcation is met, continue to predict that this precharge can be successful,
Continue this precharge；When the pre-charge voltage curve of advance demarcation is not met, execution step S6.Institute
The pre-charge voltage curve of advance demarcation is stated, is the precharge voltage value anaplasia at any time in pre-charge process
The relation curve of change, can be obtained by many experiments observation.Preferably pre-charge curve, can pass through
Theoretical Calculation is obtained, and by experimental results amendment, the final upper limit determined in precharge overshoot is bent
Line and lower limit curve.Precharge generally can be just completed in 1-2S, and time coordinate should be ms ranks.
As shown in Fig. 2 abscissa is time T, unit is yes for the pre-charge voltage curve of the advance demarcation
Second, vertical coordinate is magnitude of voltage U, and unit is volt (V).U0 is as by the precharge of experimental calibration
Voltage curve, is ideal curve, and u1 is the upper limit curve of setting, and u2 is the lower limit curve of setting.If
The precharge voltage value at current time between upper limit curve u1 and lower limit curve u2, then table
The pre-charge pressure at the bright current time meets the pre-charge voltage curve of the advance demarcation, is not otherwise inconsistent
Close the pre-charge voltage curve of the advance demarcation.The range of choice of upper limit curve u1 and lower limit curve can be with
Depending on needs according to designer or user.
S6, stop this precharge.Charge and fail.In pre-charge process, precharging voltage value is normal
In the case of, should be risen according to the pre-charge voltage curve of the advance demarcation, precharging voltage value rises
Cross slow or too fast, it is all abnormal.For example, precharging voltage value rose slowly, then may be in final preliminary filling
When the electric time reaches, pre-charge voltage is unable to reach the set goal voltage；Precharging voltage value rising is too fast,
It is probably then that charge circuit breaks down, such as charge circuit is short-circuited or opens a way.
Whether the precharge of advance demarcation is met by current pre-charge voltage is monitored during precharge
Voltage curve, predicts this charging success, so as in pre-charge process, whether decision-making stops this
Secondary precharge.In pre-charge process, it is predicted that when this precharge can not be successful, stop this preliminary filling
Electricity, can avoid the waste of insignificant precharge time, so as to further improve preliminary filling electrical efficiency, contracting
Short total high pressure Connection Time, lift driving experience.
Further, as above-mentioned one or more reason causes to stop after this precharge, all can be with
It is recharged, it is described to stop to include after S6 the step of this is pre-charged：
The actual temperature value of S7, the acquisition preliminary filling resistance in the stop timing.Specifically, it is described to obtain
Obtaining the preliminary filling resistance includes the step of the actual temperature value of the stop timing：
First, the actual current value of the preliminary filling resistance is flow through in detecting pre-charge process.
Secondly, the preliminary filling resistance is calculated described according to the actual current value and this precharge time
The heat actually produced in this precharge time.For example, the actual current value be I, precharge time
For T, the resistance of preliminary filling resistance is R, then the heat Q=I for actually producing after the completion of precharge2RT。
Again, according to the actual heat Calculation for producing preliminary filling resistance in described this precharge
Interior actual temperature value added.
The detailed computational methods of preliminary filling resistance temperature are as follows：
Preliminary filling process temperature value added：Preliminary filling resistance voltage value added * pre-charging time * preliminary filling resistance per second
Every volt of temperature increase=preliminary filling resistance temperature increase.
Preliminary filling resistance temperature reduced value：Preliminary filling resistance temperature reduced value * per second (Offtime+upper electricity phase
Between not in the time of preliminary filling)=preliminary filling resistance temperature reduced value.
Preliminary filling resistance temperature=preliminary filling resistance initial temperature+preliminary filling resistance temperature increase-preliminary filling resistance temperature
Reduced value.
Tnext=T+ Δ Tinc formula 1
Tnext=T- Δ Tdec × (t1+t2) formula 2
Wherein, every volt of temperature increase of preliminary filling resistance can obtain a reason according to the actual heat for producing
By value, amendment is demarcated according to real vehicle then and obtains actual value.Preliminary filling resistance voltage reduction value per second can be with
Demarcated according to real vehicle and obtained
Finally, calculate described pre- according to the initial temperature and the actual temperature value added of the preliminary filling resistance
Charge actual temperature value of the resistance in the stop timing.Initial temperature to the preliminary filling resistance in step sl
Have been introduced for degree, does not hereby repeat.The actual temperature value of the preliminary filling resistance is the precharge
The initial temperature of resistance is plus obtained by the actual temperature value added.
The actual temperature value of preliminary filling resistance in pre-charge process is obtained, if precharge failure, starts next time
Before precharge is attempted, using the actual temperature value as the initial temperature of the preliminary filling resistance, carry out pre-
The predicting temperature values prediction of charging resistance, improves the accuracy to preliminary filling resistance temperature prediction.
Further, the step for obtaining the preliminary filling resistance in the actual temperature value of the stop timing
Can include after rapid S7：
The predicting temperature values of the preliminary filling resistance after the completion of S8, prediction precharge next time.When precharge failure
When, then before next time, precharge started, if the time interval stopped with this precharge is less than default
Time threshold, then using the preliminary filling resistance this precharge be stopped the moment actual temperature value as under
The initial temperature of preliminary filling resistance during secondary prediction precharge；If the time interval is default more than described
Time threshold, then deducted in the actual temperature value that this precharge is stopped the moment with the preliminary filling resistance pre-
Fill the initial temperature of preliminary filling resistance when resistance temperature reduced value is prediction precharge next time.
That is, and if then entering the situation of line precharge, then with the preliminary filling resistance at this
Precharge be stopped the actual temperature value at moment as during prediction precharge next time the preliminary filling resistance it is initial
Temperature；If before next time, precharge started, centre has been spaced does not carry out preliminary filling for a period of time,
Preliminary filling resistance does not produce heat, and radiating has been carried out, at this time, it may be necessary to be existed with the preliminary filling resistance
It is pre- to predict next time that the actual temperature value that this precharge is stopped the moment deducts preliminary filling resistance temperature reduced value
The initial temperature of preliminary filling resistance during charging.
As the temperature sensor in battery case is not directly arranged on preliminary filling resistance, while temperature is passed
The temperature acquisition of sensor is also required to the regular hour.When first time line precharge is entered, in battery case
Hygral equilibrium, near the temperature of the temperature sensor collection of preliminary filling resistance, it is believed that be the temperature of preliminary filling resistance
Degree.In pre-charge process, preliminary filling resistance temperature is improved, but the temperature of temperature sensor does not have follower
Fast lifting, therefore the temperature value for calculating remains estimated value.Before precharge starts, based on preliminary filling
Piezoelectric voltage difference etc. carries out temperature value prediction, is that electric current based on actual acquisition etc. is estimated in pre-charge process
Calculate.
Afterwards, the pre- thermometric of the preliminary filling resistance after the completion of precharge next time is predicted according to the initial temperature
Angle value.With the step of the predicting temperature values of preliminary filling resistance after the completion of the prediction precharge introduced in step S1
It is rapid the same, can be with the step of the predicting temperature values of the preliminary filling resistance after the completion of precharge prediction next time
Including：First, calculate the voltage of the voltage and load circuit of the battery system of presently described electric automobile
Difference.Secondly, the estimating temperature of the preliminary filling resistance after the completion of precharge next time is obtained according to the difference
Value added.Finally, calculate pre- according to the initial temperature and the estimating temperature value added of the preliminary filling resistance
The predicting temperature values of the preliminary filling resistance after charging complete.Wherein, the initial temperature of the preliminary filling resistance is
It is the actual temperature value of presently described preliminary filling resistance.
S9, judge that whether the predicting temperature values of the preliminary filling resistance after the completion of precharge next time exceed institute
State default temperature threshold.When more than the default temperature threshold, execution step S10；When being less than
During the default temperature threshold, execution step S11.
S10, forbid this to charge, after time delay, restart next pre-charge process, i.e. repeat the above steps
S8-S9, recalculates predicting temperature values again after time delay, until predicting temperature values are less than the default temperature
Start next precharge again during degree threshold value.
S11, beginning precharge next time.
The predicting temperature values of preliminary filling resistance after the completion of by predicting that next time is pre-charged, and the temperature with preliminary filling resistance
Degree threshold value compares, and predicts next charging success, and then whether decision-making starts next precharge, no
The waste of insignificant precharge time is only avoided, preliminary filling electrical efficiency is further improved, is shortened total high pressure
Connection Time, lift driving experience.
When the temperature value of prediction exceedes temperature threshold, forbid into line precharge.Preliminary filling resistance is estimated simultaneously
Temperature value, elapse over time, preliminary filling resistance can natural heat dissipation, estimate preliminary filling resistance temperature, and handle
Initial temperature of the temperature as preliminary filling resistance temperature after the completion of prediction precharge.
As time goes on, the voltage meeting nature of load end declines, and when temperature prediction, should use
The voltage of actual acquisition, and according to the voltage of actual acquisition, carry out temperature prediction.Because pushing away over time
Move, battery-end becomes big with load end pressure reduction, and pre-charging time needs are longer, by what is produced on preliminary filling resistance
Heat will be more.
Embodiment 2：
Fig. 3 shows a kind of electric vehicle pre-charging control system of the embodiment of the present invention 2, the system bag
Include：First prediction module 21, the first judge module 22, disabled module 23 and precharge start module 24.
Wherein, first prediction module 21 is for before precharge starts, after the completion of prediction precharge
The predicting temperature values of preliminary filling resistance in the precharging circuit of the electric automobile.Specifically, first prediction
Module includes：Difference computational unit, for calculating voltage and the load of the battery system of the electric automobile
The difference of the voltage in loop；Estimating temperature value added obtaining unit, for obtaining preliminary filling according to the difference
The estimating temperature value added of the preliminary filling resistance after the completion of electricity；Predicting temperature values computing unit, for basis
The initial temperature of the preliminary filling resistance and the estimating temperature value added calculate the preliminary filling after the completion of precharge
The predicting temperature values of resistance.First judge module 22 is used to judge whether the predicting temperature values exceed
The temperature threshold of preliminary filling resistance set in advance.The disabled module 23 is used for when the temperature more than preliminary filling resistance
During degree threshold value, forbid starting this precharge.The precharge starts module 24 to be used for when less than advance
During the temperature threshold of setting, start precharge.In the said system of the present invention, by predicting precharge
After the completion of preliminary filling resistance predicting temperature values, and compare with the temperature threshold of preliminary filling resistance, predict this
Charging success, and then whether decision-making starts this precharge.Predicting that this precharge can not be successful
When, forbid this to be pre-charged, and when predicting that this energy that charges is successful, just start this charging, not only
The waste of insignificant precharge time is avoided, preliminary filling electrical efficiency is improved, and is shortened total high pressure connection
Time, lift driving experience.
Used as preferred embodiment, the system also includes charging process monitoring module 25, judges precharge
Whether process is normal, predicts this final success of precharge；
Charging performing module 26, if can successfully if continue charge, if can not successfully if stop this charging.
Wherein charging process monitoring module includes detection sub-module and prediction submodule.The detection sub-module
Whether the pre-charge voltage curve of advance demarcation is met for the current precharge voltage value of real-time monitoring.Prediction
Submodule is for when the pre-charge voltage curve of advance demarcation is not met, then judging that this precharge cannot
Success, failure of charging.By monitoring during precharge whether current pre-charge voltage meets in advance
The pre-charge voltage curve of demarcation, predicts this charging success, so as to determine in pre-charge process
Whether plan stops this precharge.In pre-charge process, it is predicted that when this precharge can not be successful,
Stop this precharge, the waste of insignificant precharge time can be avoided, so as to further improve pre-
Charge efficiency, shortens total high pressure Connection Time, lifts driving experience.
Further, the system also includes that actual temperature value obtains module 27.The actual temperature value is obtained
Module 27 is used to obtain actual temperature value of the preliminary filling resistance in the stop timing.Specifically, it is described
Actual temperature value obtains module to be included：Detector unit, flow through the preliminary filling for detecting in pre-charge process
The actual current value of resistance；Heat Calculation unit, for according to the actual current value and this precharge
The heat that preliminary filling resistance described in Time Calculation was actually produced within described this precharge time；Actual temperature
Value added computing unit, for described in the preliminary filling resistance according to the actual heat Calculation for producing this
Actual temperature value added in precharge time；Actual temperature value computing unit, for according to the preliminary filling
The initial temperature of resistance and the actual temperature value added calculate the preliminary filling resistance in the stop timing
Actual temperature value.The actual temperature value of preliminary filling resistance in pre-charge process is obtained, if precharge failure, opens
Begin before precharge trial next time, be and then to enter line precharge, then it is pre- at this with the preliminary filling resistance
Charging is stopped the initial temperature of the actual temperature value as preliminary filling resistance during prediction precharge next time at moment
Degree；If before next time, precharge started, centre has already been through a period of time, does not carry out preliminary filling,
Preliminary filling resistance does not produce heat, has radiated, and needs with the preliminary filling resistance in this precharge quilt
It is described pre- during precharge to predict next time that the actual temperature value of stop timing deducts preliminary filling resistance temperature reduced value
Charge the initial temperature for hindering, and enters the predicting temperature values prediction of line precharge resistance according to the initial temperature, carries
The high accuracy to preliminary filling resistance temperature prediction.
Further, the system includes the second prediction module 28, the second judge module 29, time delay module
30 start module 31 with precharge next time.Second prediction module 28 starts for the precharge in next time
Before, the actual temperature value at moment is stopped as prediction next time in this precharge using the preliminary filling resistance
The initial temperature of preliminary filling resistance during precharge, and be pre-charged next time according to initial temperature prediction
Into the predicting temperature values of the rear preliminary filling resistance.Second judge module 29 is used to judge that the next time is pre-
After charging complete, whether the predicting temperature values of the preliminary filling resistance exceed the default temperature threshold.It is described
Time delay module 30 for when more than the default temperature threshold when, then recalculate pre- thermometric after time delay again
Angle value, starts next precharge when predicting temperature values are less than the default temperature threshold again.Institute
State precharge next time and start module 31 for when less than the default temperature threshold, then starting next time
Precharge.By predict next time precharge after the completion of preliminary filling resistance predicting temperature values, and with preliminary filling resistance
Temperature threshold compare, predict next charging success, and then whether decision-making start next precharge,
The waste of insignificant precharge time is not only avoided, preliminary filling electrical efficiency is further improved, is shortened total height
The pressure Connection Time, lift driving experience.
Obviously, above-described embodiment is only intended to clearly illustrate example, and not to embodiment
Restriction.For those of ordinary skill in the field, can also do on the basis of the above description
Go out the change or variation of other multi-forms.There is no need to be exhaustive to all of embodiment.
And thus it is extended obvious change or change still in the protection domain of the invention among.
Claims (12)
1. a kind of electric vehicle pre-charging control method, it is characterised in that comprise the steps：
Before precharge starts, preliminary filling in the precharging circuit of the electric automobile after the completion of prediction precharge
The predicting temperature values of resistance；
Judge whether the predicting temperature values exceed the temperature threshold of preliminary filling resistance set in advance；
When the temperature threshold more than preliminary filling resistance, forbid starting this precharge；
When less than predetermined temperature threshold value, start precharge.
2. electric vehicle pre-charging control method according to claim 1, it is characterised in that described pre-
Survey
Include：
Calculate the difference of the voltage of the voltage and load circuit of the battery system of the electric automobile；
The estimating temperature value added of the preliminary filling resistance after the completion of being pre-charged according to the difference；
After the completion of precharge is calculated according to the original temperature and the estimating temperature value added of the preliminary filling resistance
The predicting temperature values of the preliminary filling resistance.
3. electric vehicle pre-charging control method according to claim 1 and 2, it is characterised in that institute
Include after stating the step of starting precharge：
Judge whether pre-charge process is normal, predict this final success of precharge；
If can successfully if continue charge, if can not successfully if stop this charging.
4. electric vehicle pre-charging control method according to claim 3, it is characterised in that judge pre-
Whether charging process is normal, predicts the step of this is pre-charged final success, including
Whether the current precharge voltage value of real-time monitoring meets the pre-charge voltage curve of advance demarcation；
When the pre-charge voltage curve of advance demarcation is not met, then judge that this precharge cannot be successful.
5. electric vehicle pre-charging control method according to claim 3, it is characterised in that described to stop
Include after the step of stopping this precharge：
Obtain actual temperature value of the preliminary filling resistance in the stop timing.
6. electric vehicle pre-charging control method according to claim 5, it is characterised in that described to obtain
Obtaining the preliminary filling resistance includes the step of the actual temperature value of the stop timing：
The actual current value of the preliminary filling resistance is flow through in detection pre-charge process；
Described preliminary filling resistance is calculated according to the actual current value and this, and this is pre- described precharge time
The heat actually produced in charging interval；
According to the actual heat Calculation for producing, preliminary filling resistance is within described this precharge time
Actual temperature value added；
The preliminary filling resistance is calculated according to the initial temperature and the actual temperature value added of the preliminary filling resistance
In the actual temperature value of the stop timing.
7. the electric vehicle pre-charging control method according to claim 5 or 6, it is characterised in that institute
Include after the acquisition preliminary filling resistance is stated the step of the actual temperature value of the stop timing：
Ith, before next time, precharge started, if the time interval stopped with this precharge is less than pre-
If time threshold, then using the preliminary filling resistance this precharge be stopped the actual temperature value at moment as
The initial temperature of preliminary filling resistance during prediction precharge next time；If the time interval is more than described pre-
If time threshold, then the actual temperature value at moment is stopped in this precharge with the preliminary filling resistance and is deducted
The initial temperature of preliminary filling resistance when preliminary filling resistance temperature reduced value is prediction precharge next time；
IIth, the predicted temperature of the preliminary filling resistance after the completion of precharge next time is predicted according to the initial temperature
Value；
IIIth, after the completion of judging to be pre-charged the next time, whether the predicting temperature values of the preliminary filling resistance exceed institute
State default temperature threshold；
IVth, when more than the default temperature threshold, then forbid this to charge, repeat after time delay
State I-III step and recalculate predicting temperature values, until predicting temperature values are less than the default temperature threshold
Start next precharge during value again；When less than the default temperature threshold, then start next preliminary filling
Electricity.
8. a kind of electric vehicle pre-charging control system, it is characterised in that include：
First prediction module, for, before precharge starts, predicting the electronic vapour after the completion of precharge
The predicting temperature values of preliminary filling resistance in the precharging circuit of car；
First judge module, for judging whether the predicting temperature values exceed preliminary filling resistance set in advance
Temperature threshold；
Disabled module, for when the temperature threshold of preliminary filling resistance is exceeded, forbidding starting this precharge；
Precharge starts module, for, when less than predetermined temperature threshold value, starting precharge.
9. system according to claim 8, it is characterised in that also include：
Charging process monitoring module, judges whether pre-charge process is normal, predicts this final energy of precharge
No success；
Charging performing module, if can successfully if continue charge, if can not successfully if stop this charging.
10. electric vehicle pre-charging control system according to claim 9, it is characterised in that fill
Electric process monitoring module also includes：
Whether detection sub-module, meet the preliminary filling of advance demarcation for the current precharge voltage value of real-time monitoring
Piezoelectric voltage curve；
Prediction submodule, for when the pre-charge voltage curve of advance demarcation is not met, then judging this
Precharge cannot be successful.
The 11. electric vehicle pre-charging control systems according to claim 8 or 9 or 10, its feature
It is that the system also includes：
Actual temperature value obtains module, for obtaining actual temperature of the preliminary filling resistance in the stop timing
Angle value.
The 12. electric vehicle pre-charging control systems according to claim 8 or 9 or 10, its feature
It is that the actual temperature value obtains module to be included：
Detector unit, for detecting the actual current value that the preliminary filling resistance is flow through in pre-charge process；
Heat Calculation unit, for calculating described pre- according to the actual current value and this precharge time
The heat that resistance of charging actually was produced within described this precharge time；
Actual temperature value added computing unit, for the preliminary filling according to the actual heat Calculation for producing
Actual temperature value added of the resistance within described this precharge time；
Actual temperature value computing unit, for the initial temperature according to the preliminary filling resistance and the actual temperature
Degree value added calculates actual temperature value of the preliminary filling resistance in the stop timing.
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| CN201510671774.1A CN106602622B (en) | 2015-10-15 | 2015-10-15 | Electric vehicle pre-charging control method and system |
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| CN201510671774.1A CN106602622B (en) | 2015-10-15 | 2015-10-15 | Electric vehicle pre-charging control method and system |
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| CN107650683A (en) * | 2017-09-27 | 2018-02-02 | 风度（常州）汽车研发院有限公司 | Precharge control method and controller |
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