CN109795369A - A kind of electric car course continuation mileage evaluation method based on average current drain - Google Patents
A kind of electric car course continuation mileage evaluation method based on average current drain Download PDFInfo
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Abstract
The present invention provides a kind of electric car course continuation mileage evaluation method based on average current drain.This method comprises: every one group of real-time battery level information of operating range d record is used as and currently organizes real-time battery level information, and it is updated using m group real-time battery level information of the current group of real time electrical quantity information to previous moment；The real-time battery level information of m group at current time is obtained every prefixed time interval；The average current drain in m × d distance is calculated according to the real-time battery level information of the m group at the current time；Using the real-time battery level information of m group at current time as the battery level information at current time, and estimate to obtain course continuation mileage using the battery level information at the current time and the average current drain；The course continuation mileage that estimation obtains is filtered and shows filtered course continuation mileage in instrument.The present invention calculates course continuation mileage simple and that instrument is shown after filtering and no longer jumps independent of vehicle mounted guidance and cloud platform.
Description
Technical field
The present invention relates to automobile course continuation mileage estimating techniques field more particularly to a kind of electric cars based on average current drain
Course continuation mileage evaluation method.
Background technique
Electric car is limited by the development bottleneck of battery industry, and course continuation mileage is unable to satisfy the psychological needs of consumer,
Charging is also convenient not as good as fuel filling, therefore electric car car owner focuses on course continuation mileage in trip, but is constrained to electricity
The influence of the factors such as the estimation of pond electricity, the driving habit of driver, driving cycle, course continuation mileage are difficult to very smart
Really.
The Chinese patent of Publication No. CN105459842A discloses a kind of electric car course continuation mileage evaluation method,
By cloud platform storage routing information and the path of planning search estimated power consumption and compared with real surplus electricity,
To judge course continuation mileage.This method depends on onboard navigation system and cloud platform, and the letter such as vehicle load information, driver's habit
Breath can not upload in platform, and there are certain errors for the power consumption that platform provides.
Summary of the invention
To solve the above-mentioned problems in the prior art, it is continuous that the present invention provides a kind of electric car based on average current drain
Navigate mileage evaluation method, independent of vehicle mounted guidance and cloud platform, calculates course continuation mileage simple and that instrument is shown after filtering
No longer jump.
A kind of electric car course continuation mileage evaluation method based on average current drain provided by the invention, this method mainly include
Following steps:
One group of step 1, every operating range d record real-time battery level information are used as and currently organize real-time battery level information,
And it is updated using m group real-time battery level information of the current group of real time electrical quantity information to previous moment；
Step 2, the real-time battery level information of m group that current time is obtained every prefixed time interval；
Step 3 calculates the average electricity in m × d distance according to the real-time battery level information of m group at the current time
Consumption；
Step 4, using the real-time battery level information of m group at current time as the battery level information at current time, and
It estimates to obtain course continuation mileage using the battery level information and the average current drain at the current time；
Step 5 is filtered the course continuation mileage that estimation obtains and shows filtered course continuation mileage in instrument.
Further, the real-time battery level information is calculated according to formula (1):
Q=a × SOC × SOH × SOE (1)
Wherein, a indicates impact factor, related with the temperature of power battery and monomer pressure difference；SOC indicates the surplus of power battery
Remaining electricity percentage；The health status of SOH expression power battery；The energy state of SOE expression power battery.
Further, described electric in real time using m group of the current group of real time electrical quantity information to previous moment in step 1
Pond information about power is updated specifically:
Define the n moment the real-time battery level information of m group beN+ is denoted as at the time of after operating range d
1 moment, the current group of real time electrical quantity information recorded after operating range d areThe then real-time battery capacity letter of the m group at n+1 moment
Breath is
Further, the average current drain in m × d distance in step 3 is calculated according to formula (2):
Wherein, QSIndicate the average current drain of current time T,Indicate the 1st group of real-time battery capacity letter of current time T
Breath,Indicate the real-time battery level information of m group of current time T.
Further, the course continuation mileage in step 4 is calculated according to formula (3):
Wherein, b is impact factor, the temperature, the temperature of electric machine controller MCU and the total voltage of power battery with motor
It is related；QSIndicate the average current drain of current time T,Indicate the real-time battery level information of m group of current time T.
Further, the course continuation mileage obtained in step 5 to estimation is filtered specifically:
The course continuation mileage R that estimation is obtainedCThe course continuation mileage R shown with current instrumentOIt is compared, obtains comparison result X
=RC-RO；
If X >=0, the course continuation mileage R that shows current instrument after operating range D1O-1；If X < 0, operating range D2
The course continuation mileage R for afterwards showing current instrumentO-1；Wherein, [1.1,2.5] D1 ∈, D2 ∈ [0.4,0.9], D1 and D2 are real number.
Beneficial effects of the present invention:
A kind of electric car course continuation mileage evaluation method based on average current drain provided by the invention, according to nearest traveling work
Condition calculates average current drain, and with the variation of driving cycles, average current drain real-time change passes through the course continuation mileage and instrument that will be estimated
The course continuation mileage that table is shown is compared, and according to comparison result, the course continuation mileage obtained to estimation is filtered, i.e., by adjusting
The speed of course continuation mileage that instrument is shown variation constantly approaches true course continuation mileage, so that the continuation of the journey that instrument is shown
Mileage will not be jumped substantially, improve the accuracy of course continuation mileage.
Detailed description of the invention
Fig. 1 is a kind of stream of the electric car course continuation mileage evaluation method based on average current drain provided in an embodiment of the present invention
Journey schematic diagram.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached in the embodiment of the present invention
Figure, technical solution in the embodiment of the present invention are explicitly described, it is clear that described embodiment is a part of the invention
Embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making wound
Every other embodiment obtained under the premise of the property made labour, shall fall within the protection scope of the present invention.
Fig. 1 is a kind of stream of the electric car course continuation mileage evaluation method based on average current drain provided in an embodiment of the present invention
Journey schematic diagram.As shown in Figure 1, method includes the following steps:
One group of real-time battery level information of S101, every operating range d record, which is used as, currently organizes real-time battery level information, and
It is updated using m group real-time battery level information of the current group of real time electrical quantity information to previous moment；
S102, the real-time battery level information of m group that current time is obtained every prefixed time interval；
S103, the average current drain in m × d distance is calculated according to the real-time battery level information of m group at the current time；
S104, using the real-time battery level information of m group at current time as the battery level information at current time, and benefit
It estimates to obtain course continuation mileage with the battery level information at the current time and the average current drain；
S105, the course continuation mileage that estimation obtains is filtered and shows filtered course continuation mileage in instrument.
A kind of electric car course continuation mileage evaluation method based on average current drain provided in an embodiment of the present invention, according to nearest
Driving cycle calculates average current drain, with the variation of driving cycles, average current drain real-time change, by the continuation of the journey that will estimate
The course continuation mileage that journey and instrument are shown is compared, and according to comparison result, the course continuation mileage obtained to estimation is filtered, i.e., logical
The speed for the course continuation mileage variation that adjustment instrument is shown is crossed constantly to approach true course continuation mileage, so that instrument is shown
Course continuation mileage will not substantially jump, improve the accuracy of course continuation mileage.
On the basis of the above embodiments, the present invention provides another embodiment, and the embodiment of the present invention is with distance d value
1 kilometer, for m=50, process is specific as follows:
Every 1 kilometer of the traveling of S201, automobile, instrument then pass through the electricity letter that battery management system BMS is sent in CAN bus
Breath obtains primary real-time battery level information, and the CAN bus transmission rate is 250kbit/s, and be will acquire real-time
Battery level information is stored in local, records 50 groups of information about power altogether；And believed using the last real-time battery capacity obtained
Breath is updated 50 groups of information about power that previous moment records.
As an embodiment, the real-time battery level information in this step is calculated according to formula (1):
Q=a × SOC × SOH × SOE (1)
Wherein, a indicates impact factor, related with the temperature of power battery and monomer pressure difference.The value range of general a is 0
~1, when the temperature is excessively high or monomer pressure difference is excessive, a=0；When temperature is more than warning value more than warning value or monomer pressure difference, according to
Voltage carries out linear drop power, and a value is begun to decline from 1, and voltage is lower, and a value is smaller.SOC (State Of Charge) indicates dynamic
The residual power percentage of power battery.SOH (State Of Health) indicates the health status of power battery, with charge and discharge time
The use environment of number, charging and discharging currents size and battery pack is related, and value range is usually 0.8~1.SOE(State Of
Energy the energy state of power battery) is indicated, related with the total electricity of Vehicular battery packet, value range is generally in 16kWh
To between 60kWh.
Operating range d is the vehicle speed information for obtaining anti-lock braking system ABS first by instrument and being sent in CAN bus,
Then pass through the integral calculation with the time again.
As an embodiment, the update in this step can be carried out as follows: the m group for defining the n moment is real
When battery level information beIt is denoted as the n+1 moment at the time of after operating range d, is recorded after operating range d
Currently group real time electrical quantity information isThen the real-time battery level information of m group at n+1 moment isI.e. after 1 kilometer of vehicle driving, current electric quantity information, and handle are recorded again
Previous momentIt deletes, previous momentIt is assigned to current timePrevious momentIt is assigned to and works as
The preceding momentAnd so on, the last time recordIt is assigned toOne group of new data of every record, then weigh
Multiple primary above-mentioned update operation.
S202,50 groups of real-time battery level informations for obtaining current time T for every 5 minutes；
S203, it is calculated in m × d distance according to the real-time battery level information of m=50 group of current time T according to formula (2)
Average current drain；
Wherein, QSIndicate the average current drain of current time T,Indicate the 1st group of real-time battery capacity letter of current time T
Breath,Indicate the real-time battery level information of m group of current time T.Under normal circumstances, it needs to be averaged for ease of calculation
The unit conversion of power consumption is kWh/100km.
S204, the real-time battery level information of m group by current timeAs the battery level information at current time,
And course continuation mileage is obtained according to formula (3) estimation using the battery level information at the current time and the average current drain；
Wherein, b is impact factor, the temperature, the temperature of electric machine controller MCU and the total voltage of power battery with motor
It is related.The value range of general b is 0~1, and when the temperature is excessively high or when brownout, b=0 (refers to directly lower high pressure, is equivalent to
Vehicle stall)；When temperature is more than warning value more than warning value or voltage, linear drop power is carried out according to voltage, b value is since 1
Decline, voltage is lower, and b value is smaller.
S205, the course continuation mileage obtained to estimation are filtered and show in instrument filtered course continuation mileage, filter
Process specifically:
The course continuation mileage R that estimation is obtainedCThe course continuation mileage R shown with current instrumentOIt is compared, obtains comparison result X
=RC-RO；
If X >=0, the course continuation mileage R that shows current instrument after operating range D1O-1；If X < 0, operating range D2
The course continuation mileage R for afterwards showing current instrumentO-1；Wherein, [1.1,2.5] D1 ∈, D2 ∈ [0.4,0.9], D1 and D2 are real number.
In practical applications, as an embodiment, if 25≤X, in the continuation of the journey that 2.5 kilometers of instrument of traveling are shown
Journey reduces 1 kilometer；
If 20≤X < 25, the course continuation mileage that 2.2 kilometers of instrument of traveling are shown reduces 1 kilometer；
If 15≤X < 20, the course continuation mileage that 1.8 kilometers of instrument of traveling are shown reduces 1 kilometer；
If 10≤X < 15, the course continuation mileage that 1.5 kilometers of instrument of traveling are shown reduces 1 kilometer；
If 5≤X < 10, the course continuation mileage that 1.3 kilometers of instrument of traveling are shown reduces 1 kilometer；
If 0≤X < 5, the course continuation mileage that 1.1 kilometers of instrument of traveling are shown reduces 1 kilometer；
If -5≤X < 0, the course continuation mileage that 0.9 kilometer of instrument of traveling is shown reduces 1 kilometer；
If <-5-10≤X, the course continuation mileage that 0.8 kilometer of instrument of traveling is shown reduces 1 kilometer；
If <-10-15≤X, the course continuation mileage that 0.6 kilometer of instrument of traveling is shown reduces 1 kilometer；
If X≤- 15, the course continuation mileage that 0.4 kilometer of instrument of traveling is shown reduces 1 kilometer.
The course continuation mileage that instrument is shown changes according to the above Rule of judgment, realizes the purpose not jumped.
The above parameter is to be changed fastly according to current road conditions and information of vehicles by the course continuation mileage that constantly adjustment instrument is shown
It is slow constantly to approach true course continuation mileage, and the dislike that jumped so as to cause driver.
That is, if estimation gained course continuation mileage is greater than the course continuation mileage that current instrument is shown, the course continuation mileage that instrument is shown
What is changed is slow；If estimation gained course continuation mileage is less than the course continuation mileage that current instrument is shown, the course continuation mileage that instrument is shown becomes
That changes is fast.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (6)
1. a kind of electric car course continuation mileage evaluation method based on average current drain characterized by comprising
One group of step 1, every operating range d record real-time battery level information are used as and currently organize real-time battery level information, and benefit
It is updated with m group real-time battery level information of the current group of real time electrical quantity information to previous moment；
Step 2, the real-time battery level information of m group that current time is obtained every prefixed time interval；
Step 3 calculates the average current drain in m × d distance according to the real-time battery level information of m group at the current time；
Step 4, using the real-time battery level information of m group at current time as the battery level information at current time, and utilize
The battery level information at the current time and the average current drain are estimated to obtain course continuation mileage；
Step 5 is filtered the course continuation mileage that estimation obtains and shows filtered course continuation mileage in instrument.
2. the method according to claim 1, wherein the real-time battery level information is calculated according to formula (1)
It arrives:
Q=a × SOC × SOH × SOE (1)
Wherein, a indicates impact factor, related with the temperature of power battery and monomer pressure difference；SOC indicates the residue electricity of power battery
Measure percentage；The health status of SOH expression power battery；The energy state of SOE expression power battery.
3. the method according to claim 1, wherein the utilization current group of real time electrical quantity in step 1
Information is updated the real-time battery level information of m group of previous moment specifically:
Define the n moment the real-time battery level information of m group beWhen being denoted as n+1 at the time of after operating range d
It carves, the current group of real time electrical quantity information recorded after operating range d isThen the real-time battery level information of m group at n+1 moment is
4. the method according to claim 1, wherein the average current drain in m × d distance in step 3
It is calculated according to formula (2):
Wherein, QSIndicate the average current drain of current time T,Indicate the 1st group of real-time battery level information of current time T,
Indicate the real-time battery level information of m group of current time T.
5. the method according to claim 1, wherein the course continuation mileage in step 4 is counted according to formula (3)
It calculates:
Wherein, b is impact factor, is had with the temperature, the temperature of electric machine controller MCU and the total voltage of power battery of motor
It closes；QSIndicate the average current drain of current time T,Indicate the real-time battery level information of m group of current time T.
6. the method according to claim 1, wherein the course continuation mileage obtained in step 5 to estimation is filtered
Specifically:
The course continuation mileage R that estimation is obtainedCThe course continuation mileage R shown with current instrumentOIt is compared, obtains comparison result X=
RC-RO；
If X >=0, the course continuation mileage R that shows current instrument after operating range D1O-1；If X < 0, make to work as after operating range D2
The course continuation mileage R that preceding instrument is shownO-1；Wherein, [1.1,2.5] D1 ∈, D2 ∈ [0.4,0.9], D1 and D2 are real number.
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| CN111546941A (en) * | 2020-04-27 | 2020-08-18 | 中国第一汽车股份有限公司 | Method and device for determining remaining mileage of vehicle, vehicle and storage medium |
| CN112622619A (en) * | 2020-12-17 | 2021-04-09 | 江苏开沃汽车有限公司 | Display method of code-breaking screen instrument |
| CN114475257A (en) * | 2022-01-25 | 2022-05-13 | 中通客车股份有限公司 | Method and system for calculating driving range of pure electric bus |
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