CN105426672A - Energy consumption calculation method for pure electric vehicle - Google Patents
Energy consumption calculation method for pure electric vehicle Download PDFInfo
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- CN105426672A CN105426672A CN201510769799.5A CN201510769799A CN105426672A CN 105426672 A CN105426672 A CN 105426672A CN 201510769799 A CN201510769799 A CN 201510769799A CN 105426672 A CN105426672 A CN 105426672A
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Abstract
The invention relates to an energy consumption calculation method for a pure electric vehicle. The method comprises the following steps: S1, according to basic parameters and speed data of a complete vehicle, calculating the power consumption of the complete vehicle under a cyclic working condition; S2, establishing a power consumption calculation model of an auxiliary system under a cyclic working condition; and S3, according to the power consumption of the complete vehicle and the power consumption calculation model of the auxiliary system under one cyclic working condition, obtaining the energy consumption of the complete vehicle under one cyclic working condition, and performing addition on the energy consumption of the complete vehicle under cyclic working conditions to obtain the total energy consumption of the complete vehicle. According to the method, big data processing is performed according to adapted working conditions in a design process, an energy consumption simulation evaluation model is established, reasonable economy evaluation indexes are obtained, and the pre-judgment is performed for the design, so that the design cost is reduced and more rationalized, the resources are reasonably configured, and effective support is provided for an energy management policy of the complete vehicle.
Description
Technical field
The present invention relates to automobile energy consumption computing technique field, particularly a kind of EV Energy Consumption computing method.
Background technology
Dynamic property and economy are the basic performance index of pure electric automobile and requirement, and dynamic property embodies the extreme sport ability that car load can reach, and is the basic guarantee meeting cornering ability; Economy then embodies energy consumption level, is the important embodiment of car load technical advance.Under rational economy condition, have dynamic property free from worldly cares is desired by all designs, but existing entire vehicle design often manufacture after according to typical public transport operating mode, the ruuning situations such as cruising mode carry out energy consumption testing, carry out passive evaluation to economy, car load lacks perfect, reliable economic index evaluation before producing.
Summary of the invention
The object of the invention is to the shortcoming overcoming prior art, a kind of Calculation Method of Energy Consumption that rationally can obtain pure electric automobile economy state is provided, the method adopts rational computing formula to draw car load energy consumption, and result of calculation is objective, science, reliable, basically identical with measured data.
Object of the present invention is achieved through the following technical solutions: a kind of EV Energy Consumption computing method, comprise the following steps:
S1, according to car load basic parameter and vehicle speed data, calculate car load aerodynamic power under a state of cyclic operation and consume;
S2, set up the power consumption calculation model of backup system under a state of cyclic operation;
S3, draw the car load energy consumption under a state of cyclic operation according to the power consumption calculation model of the consumption of car load aerodynamic power and backup system under described state of cyclic operation, under each state of cyclic operation, car load energy consumption is added and is total car load energy consumption.
Further, the concrete computation process of described step S1 is:
Gather the speed information in a state of cyclic operation by existing drive recorder, according to car load basic parameter and vehicle speed data, calculate car load aerodynamic power in a state of cyclic operation and consume, computing formula is P
d=F*v, wherein,
In formula: P
dfor car load aerodynamic power consumes, unit is watt (W); F is car load running resistance, and unit is N; υ is automobilism speed, and unit is m/s; G is complete vehicle weight, and unit is N; F is coefficient of rolling resistance, dimensionless; θ is the inclination angle of road surface and surface level, and unit is rad; C
dfor coefficient of air resistance, dimensionless; A is car load front face area, and unit is m
2.
Further, the concrete computation process of described step S2 is:
Analyzed by great many of experiments, set up the power consumption calculation model of a state of cyclic operation backup system, described backup system power consumption calculation model is the second-order fit function about a state of cyclic operation working time and weather temperature, and concrete model is as follows: P
f=(K
1* t
2+ K
2* t+K
3)+(K
4* T
2+ K
s* T+K
6);
In formula: P
ffor the power consumption of operating mode backup system, unit is watt (W); K
1, K
2, K
3for operating mode turns to the power consumption calculation coefficient with BAS (Brake Assist System), dimensionless; T is a state of cyclic operation time, and unit is s; K
4, K
5, K
6for the power consumption calculation coefficient of operating mode air-conditioning system, dimensionless; T is temperature, and unit is DEG C.
Further, the concrete computation process of described step S3 is:
Under a state of cyclic operation, the consumption of car load aerodynamic power is added with backup system power consumption and is the total power consumption of car load under a state of cyclic operation, i.e. P
z=P
f+ P
d, by the power consumption integration total to the car load under a state of cyclic operation, obtain the car load energy consumption under a state of cyclic operation, i.e. E
z=∫ P
zdt, under each state of cyclic operation, car load energy consumption is added and is total car load energy consumption;
In formula: P
zfor the power consumption that car load is total, unit is watt (W); E
zbe the car load energy consumption under a state of cyclic operation, unit is Ws.
The present invention has the following advantages: pure electric automobile economic performance level the most intuitively evaluation index is single charge continual mileage number or energy expenditure rate.The present invention just carries out large data processing according to the operating mode adapted in the design process, set up energy simulation evaluation model, obtain rational Economic feasibility target, for anticipation is carried out in design, not only reduce design cost, and design is more rationalized, make resource obtain reasonable disposition, and provide effective support for car load energy management strategies.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of EV Energy Consumption computing method;
Vehicle speed data figure under the state of cyclic operation collected in Fig. 2 embodiment;
Fig. 3 is car load aerodynamic power consumption figure under a state of cyclic operation in embodiment.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described, but protection scope of the present invention is not limited to the following stated.
A kind of EV Energy Consumption computing method, Fig. 1 is the schematic flow sheet of EV Energy Consumption computing method, and it comprises the following steps:
S1, according to car load basic parameter and vehicle speed data, calculate car load aerodynamic power under a state of cyclic operation and consume, concrete computation process is:
Gather the speed information in a state of cyclic operation by existing drive recorder, Fig. 2 is the vehicle speed data under a state of cyclic operation, and horizontal ordinate is the time, and unit is second, and ordinate is the speed of a motor vehicle, and unit is Km/h.According to the vehicle speed data in car load basic parameter and Fig. 2, calculate car load aerodynamic power in a state of cyclic operation and consume, computing formula is P
d=F*v, wherein,
In formula: P
dfor car load aerodynamic power consumes, unit is watt (W); F is car load running resistance, and unit is N; υ is automobilism speed, and unit is m/s; G is complete vehicle weight, and unit is N; F is coefficient of rolling resistance, dimensionless; θ is the inclination angle of road surface and surface level, and unit is rad; C
dfor coefficient of air resistance, dimensionless; A is car load front face area, and unit is m
2.
In Fig. 2 operating mode, under a state of cyclic operation, as shown in Figure 3, horizontal ordinate is the time to the consumption of car load aerodynamic power, and unit is second, and ordinate is power, and unit is kW.
S2, set up the power consumption calculation model of backup system under a state of cyclic operation, concrete computation process is:
Analyzed by great many of experiments, set up the power consumption calculation model of a state of cyclic operation backup system, described backup system power consumption calculation model is the second-order fit function about a state of cyclic operation working time and weather temperature, and concrete model is as follows: P
f=(K
1* t
2+ K
2* t+K
3)+(K
4* T
2+ K
5* T+K
6);
In formula: P
ffor the power consumption of operating mode backup system, unit is watt (W); K
1, K
2, K
3for operating mode turns to the power consumption calculation coefficient with BAS (Brake Assist System), dimensionless; T is a state of cyclic operation time, and unit is s; K
4, K
5, K
6for the power consumption calculation coefficient of operating mode air-conditioning system, dimensionless; T is temperature, and unit is DEG C.
In the operating mode of Fig. 2, it is 1096W that operating mode turns to the power consumption some numerical results of BAS (Brake Assist System), and the result of calculation of the power consumption part of operating mode air-conditioning system is 3106W, and therefore the power consumption of a state of cyclic operation backup system is 4202W.
S3, draw the car load energy consumption under a state of cyclic operation according to the power consumption calculation model of the consumption of car load aerodynamic power and backup system under described state of cyclic operation, under each state of cyclic operation, car load energy consumption is added and is total car load energy consumption, and concrete computation process is:
Under a state of cyclic operation, the consumption of car load aerodynamic power is added with backup system power consumption and is the total power consumption of car load under a state of cyclic operation, i.e. P
z=P
f+ P
d, by the power consumption integration total to the car load under a state of cyclic operation, obtain the car load energy consumption under a state of cyclic operation, i.e. E
z=∫ P
zdt, under each state of cyclic operation, car load energy consumption is added and is total car load energy consumption, and in present embodiment, state of cyclic operation is one, and namely under a state of cyclic operation, car load energy consumption is total car load energy consumption;
In formula: P
zfor the power consumption that car load is total, unit is watt (W); E
zbe the car load energy consumption under a state of cyclic operation, unit is Ws.
Car load energy consumption in calculating chart 2 operating mode is 2.976kWh, and measured data is 2.974kWh, basic consistent with measured data.
Claims (4)
1. EV Energy Consumption computing method, comprise the following steps:
S1, according to car load basic parameter and vehicle speed data, calculate car load aerodynamic power under a state of cyclic operation and consume;
S2, set up the power consumption calculation model of backup system under a state of cyclic operation;
S3, draw the car load energy consumption under a state of cyclic operation according to the power consumption calculation model of the consumption of car load aerodynamic power and backup system under described state of cyclic operation, under each state of cyclic operation, car load energy consumption is added and is total car load energy consumption.
2. a kind of EV Energy Consumption computing method according to claim 1, is characterized in that: the concrete computation process of described step S1 is:
Gather the speed information in a state of cyclic operation by existing drive recorder, according to car load basic parameter and vehicle speed data, calculate car load aerodynamic power in a state of cyclic operation and consume, computing formula is P
d=F*v, wherein,
In formula: P
dfor car load aerodynamic power consumes, unit is watt (W); F is car load running resistance, and unit is N; υ is automobilism speed, and unit is m/s; G is complete vehicle weight, and unit is N; F is coefficient of rolling resistance, dimensionless; θ is the inclination angle of road surface and surface level, and unit is rad; C
dfor coefficient of air resistance, dimensionless; A is car load front face area, and unit is m
2.
3. a kind of EV Energy Consumption computing method according to claim 1, is characterized in that: the concrete computation process of described step S2 is:
Analyzed by great many of experiments, set up the power consumption calculation model of a state of cyclic operation backup system, described backup system power consumption calculation model is the second-order fit function about a state of cyclic operation working time and weather temperature, and concrete model is as follows:
In formula: P
ffor the power consumption of operating mode backup system, unit is watt (W); K
1, K
2, K
3for operating mode turns to the power consumption calculation coefficient with BAS (Brake Assist System), dimensionless; T is a state of cyclic operation time, and unit is s; K
4, K
5, K
6for the power consumption calculation coefficient of operating mode air-conditioning system, dimensionless; T is temperature, and unit is DEG C.
4. a kind of EV Energy Consumption computing method according to claim 1, is characterized in that: the concrete computation process of described step S3 is:
Under a state of cyclic operation, the consumption of car load aerodynamic power is added with backup system power consumption and is the total power consumption of car load under a state of cyclic operation, i.e. P
z=P
f+ P
d, by the power consumption integration total to the car load under a state of cyclic operation, obtain the car load energy consumption under a state of cyclic operation, i.e. E
z=∫ P
zdt, under each state of cyclic operation, car load energy consumption is added and is total car load energy consumption; In formula: P
zfor the power consumption that car load is total, unit is watt (W); E
zbe the car load energy consumption under a state of cyclic operation, unit is Ws.
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| CN111696350A (en) * | 2020-06-10 | 2020-09-22 | 交通运输部科学研究院 | Electric bus local working condition evaluation method based on operation monitoring data |
| CN111873804A (en) * | 2020-06-30 | 2020-11-03 | 河南德力新能源汽车有限公司 | Electric vehicle working condition data generation method and energy consumption evaluation working condition generation method |
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| CN106596135A (en) * | 2016-12-29 | 2017-04-26 | 吉林大学 | Electric car real driving energy consumption test, evaluation and prediction method |
| CN109752590A (en) * | 2019-01-28 | 2019-05-14 | 北京航空航天大学 | A kind of Electric Transit energy consumption estimation method based on data-driven |
| CN110486017A (en) * | 2019-08-30 | 2019-11-22 | 西安建筑科技大学 | A kind of automatic driving vehicle energy consumption power-economizing method based on Open pit Area path |
| CN110486017B (en) * | 2019-08-30 | 2021-04-06 | 西安建筑科技大学 | Energy consumption energy-saving method for unmanned vehicle based on open-pit mine path |
| CN111696350A (en) * | 2020-06-10 | 2020-09-22 | 交通运输部科学研究院 | Electric bus local working condition evaluation method based on operation monitoring data |
| CN111873804A (en) * | 2020-06-30 | 2020-11-03 | 河南德力新能源汽车有限公司 | Electric vehicle working condition data generation method and energy consumption evaluation working condition generation method |
| CN111873804B (en) * | 2020-06-30 | 2023-06-30 | 德力新能源汽车有限公司 | Electric automobile working condition data generation method and energy consumption evaluation working condition generation method |
| CN113688466A (en) * | 2021-08-26 | 2021-11-23 | 苏州同元软控信息技术有限公司 | Vehicle energy consumption simulation method, device and equipment |
| CN113688466B (en) * | 2021-08-26 | 2023-11-24 | 苏州同元软控信息技术有限公司 | Vehicle energy consumption simulation method, device and equipment |
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Effective date of registration: 20200813 Address after: 610000 Qiaogou street, Qiaogou Town, Wutongqiao District, Leshan City, Sichuan Province Patentee after: DEC DONGFENG ELECTRIC MACHINERY Co.,Ltd. Address before: 614001 Yingbin Road 9, hi tech Zone, Sichuan, Leshan Patentee before: DEC (LESHAN) NEW ENERGY EQUIPMENT Co.,Ltd. |