CN105426672B - A kind of EV Energy Consumption calculation method - Google Patents
A kind of EV Energy Consumption calculation method Download PDFInfo
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- CN105426672B CN105426672B CN201510769799.5A CN201510769799A CN105426672B CN 105426672 B CN105426672 B CN 105426672B CN 201510769799 A CN201510769799 A CN 201510769799A CN 105426672 B CN105426672 B CN 105426672B
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Abstract
The present invention relates to a kind of EV Energy Consumption calculation methods, comprising the following steps: S1, according to vehicle basic parameter and vehicle speed data calculates vehicle aerodynamic power under a state of cyclic operation and consumes；S2, the power consumption calculation model for establishing auxiliary system under a state of cyclic operation；S3, the vehicle energy consumption under a state of cyclic operation is obtained according to the power consumption calculation model of the consumption of vehicle aerodynamic power and auxiliary system under a state of cyclic operation, vehicle energy consumption is added as total vehicle energy consumption under each state of cyclic operation.The present invention is in the design process with regard to carrying out big data processing according to adaptable operating condition, establish energy simulation evaluation model, obtain reasonable Economic feasibility target, it is prejudged for design, not only reduce design cost, and rationalize design more, so that resource has been obtained reasonable disposition, and provide effective support for vehicle energy management strategies.
Description
Technical field
The present invention relates to automobile energy consumption computing technique field, especially a kind of EV Energy Consumption calculation method.
Background technique
Dynamic property and economy are the basic performance indicators and requirement of pure electric automobile, and dynamic property, which embodies vehicle, to be reached
The extreme sport ability arrived is the basic guarantee for meeting driving performance；Economy then embodies energy consumption level, is that vehicle technology is first
Into the important embodiment of property.Possessing dynamic property free from worldly cares under the conditions of reasonable economy is that all designs are desired, however show
For some entire vehicle designs often after manufacture according to typical public transport operating condition, the operating conditions such as cruising mode carry out energy consumption survey
Examination, passively evaluates economy, and perfect, reliable economic index evaluation is lacked before vehicle production.
Summary of the invention
The purpose of the present invention is to overcome the shortcomings of the existing technology, and providing a kind of can rationally obtain pure electric automobile economy
The Calculation Method of Energy Consumption of state, this method obtain vehicle energy consumption using reasonable calculation formula, calculated result is objective, it is scientific, can
It leans on, it is almost the same with measured data.
The purpose of the present invention is achieved through the following technical solutions: a kind of EV Energy Consumption calculation method, including with
Lower step:
S1, according to vehicle basic parameter and vehicle speed data, calculate under a state of cyclic operation vehicle aerodynamic power and consume；
S2, the power consumption calculation model for establishing auxiliary system under a state of cyclic operation；
S3, according under a state of cyclic operation vehicle aerodynamic power consumption and auxiliary system power consumption calculation mould
Type obtains the vehicle energy consumption under a state of cyclic operation, and vehicle energy consumption is added as total vehicle energy consumption under each state of cyclic operation.
Further, the specific calculating process of the step S1 are as follows:
The vehicle speed information in a state of cyclic operation is acquired by existing automobile data recorder, according to vehicle basic parameter and speed
Data calculate vehicle aerodynamic power in a state of cyclic operation and consume, calculation formula Pd=F*v, wherein
In formula: PdFor the consumption of vehicle aerodynamic power, unit is watt (W)；F is vehicle running resistance, unit N；υ is vapour
The vehicle speed of service, unit m/s；G is complete vehicle weight, unit N；F is coefficient of rolling resistance, dimensionless；θ is road surface and level
The inclination angle in face, unit rad；CDFor coefficient of air resistance, dimensionless；A is vehicle front face area, unit m2。
Further, the specific calculating process of the step S2 are as follows:
It is analyzed by many experiments, establishes the power consumption calculation model of a state of cyclic operation auxiliary system, described is auxiliary
Auxiliary system power consumption calculation model is the second-order fit function about a state of cyclic operation runing time and weather temperature, specifically
Model is as follows: Pf=(K1*t2+K2*t+K3)+(K4*T2+KS*T+K6)；
In formula: PfFor the power consumption of operating condition auxiliary system, unit is watt (W)；K1、K2、K3It turns to and brakes for operating condition
The power consumption calculation coefficient of auxiliary system, dimensionless；T is a state of cyclic operation time, unit s；K4、K5、K6For operating condition sky
The power consumption calculation coefficient of adjusting system, dimensionless；T is temperature, and unit is DEG C.
Further, the specific calculating process of the step S3 are as follows:
The consumption of vehicle aerodynamic power is added as a state of cyclic operation with auxiliary system power consumption under one state of cyclic operation
The total power consumption of lower vehicle, i.e. Pz=Pf+Pd, by being integrated to the total power consumption of the vehicle under a state of cyclic operation, obtain
Vehicle energy consumption under one state of cyclic operation, i.e. Ez=∫ PzDt, vehicle energy consumption is added as total vehicle energy consumption under each state of cyclic operation；
In formula: PzFor the total power consumption of vehicle, unit is watt (W)；EzFor the vehicle energy consumption under a state of cyclic operation,
Unit is Ws.
The invention has the following advantages that the most intuitive evaluation index of pure electric automobile economic performance level is single charge
Continual mileage number or energy expenditure rate.The present invention with regard to carrying out big data processing according to adaptable operating condition, is built in the design process
Vertical energy simulation evaluation model, obtains reasonable Economic feasibility target, is prejudged for design, not only reduces and be designed to
This, and rationalize design more, so that resource has been obtained reasonable disposition, and provide effective support for vehicle energy management strategies.
Detailed description of the invention
Fig. 1 is the flow diagram of EV Energy Consumption calculation method；
Vehicle speed data figure under the state of cyclic operation collected in Fig. 2 specific embodiment；
Fig. 3 is that the consumption of vehicle aerodynamic power is schemed under a state of cyclic operation in specific embodiment.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing, but protection scope of the present invention is not limited to following institute
It states.
A kind of EV Energy Consumption calculation method, Fig. 1 are the flow diagram of EV Energy Consumption calculation method, it
The following steps are included:
S1, according to vehicle basic parameter and vehicle speed data, calculate under a state of cyclic operation vehicle aerodynamic power and consume, specifically
Calculating process are as follows:
The vehicle speed information in a state of cyclic operation is acquired by existing automobile data recorder, Fig. 2 is under a state of cyclic operation
Vehicle speed data, abscissa are the time, and unit is the second, and ordinate is speed, unit Km/h.According to vehicle basic parameter and Fig. 2
In vehicle speed data, calculate in a state of cyclic operation vehicle aerodynamic power and consume, calculation formula Pd=F*v, wherein
In formula: PdFor the consumption of vehicle aerodynamic power, unit is watt (W)；F is vehicle running resistance, unit N；υ is vapour
The vehicle speed of service, unit m/s；G is complete vehicle weight, unit N；F is coefficient of rolling resistance, dimensionless；θ is road surface and level
The inclination angle in face, unit rad；CDFor coefficient of air resistance, dimensionless；A is vehicle front face area, unit m2。
In Fig. 2 operating condition, the consumption of vehicle aerodynamic power is as shown in figure 3, abscissa is time, unit under a state of cyclic operation
For the second, ordinate is power, unit kW.
S2, the power consumption calculation model for establishing auxiliary system under a state of cyclic operation, specific calculating process are as follows:
It is analyzed by many experiments, establishes the power consumption calculation model of a state of cyclic operation auxiliary system, described is auxiliary
Auxiliary system power consumption calculation model is the second-order fit function about a state of cyclic operation runing time and weather temperature, specifically
Model is as follows: Pf=(K1*t2+K2*t+K3)+(K4*T2+K5*T+K6)；
In formula: PfFor the power consumption of operating condition auxiliary system, unit is watt (W)；K1、K2、K3It turns to and brakes for operating condition
The power consumption calculation coefficient of auxiliary system, dimensionless；T is a state of cyclic operation time, unit s；K4、K5、K6For operating condition sky
The power consumption calculation coefficient of adjusting system, dimensionless；T is temperature, and unit is DEG C.
In the operating condition of Fig. 2, operating condition is turned to and the power consumption some numerical results of brake assist system are 1096W, work
The calculated result of the power consumption part of condition air-conditioning system is 3106W, therefore the power consumption of a state of cyclic operation auxiliary system
For 4202W.
S3, according under a state of cyclic operation vehicle aerodynamic power consumption and auxiliary system power consumption calculation mould
Type obtains the vehicle energy consumption under a state of cyclic operation, and vehicle energy consumption is added as total vehicle energy consumption under each state of cyclic operation, specifically
Calculating process are as follows:
The consumption of vehicle aerodynamic power is added as a state of cyclic operation with auxiliary system power consumption under one state of cyclic operation
The total power consumption of lower vehicle, i.e. Pz=Pf+Pd, by being integrated to the total power consumption of the vehicle under a state of cyclic operation, obtain
Vehicle energy consumption under one state of cyclic operation, i.e. Ez=∫ PzDt, vehicle energy consumption is added as total vehicle energy consumption under each state of cyclic operation,
State of cyclic operation is one in present embodiment, i.e. vehicle energy consumption is total vehicle energy consumption under a state of cyclic operation；
In formula: PzFor the total power consumption of vehicle, unit is watt (W)；EzFor the vehicle energy consumption under a state of cyclic operation,
Unit is Ws.
Through calculating the vehicle energy consumption in Fig. 2 operating condition be 2.976kWh, measured data 2.974kWh, substantially with actual measurement number
According to consistent.
Claims (3)
1. a kind of EV Energy Consumption calculation method, comprising the following steps:
S1, according to vehicle basic parameter and vehicle speed data, calculate under a state of cyclic operation vehicle aerodynamic power and consume；
S2, the power consumption calculation model for establishing auxiliary system under a state of cyclic operation；Specific calculating process are as follows:
It is analyzed by many experiments, establishes the power consumption calculation model of a state of cyclic operation auxiliary system, the auxiliary system
System power consumption calculation model is the second-order fit function about a state of cyclic operation runing time and weather temperature,
Concrete model is as follows:
pf=(K1*t2+K2*t+K3)+(K4*T2+K5*T+K6)
In formula: K1, K2, K3 are the power consumption calculation coefficient of operating condition steering and brake assist system, dimensionless；T is one and follows
Ring operating condition time, unit s；K4, K5, K6 are the power consumption calculation coefficient of operating condition air-conditioning system, dimensionless；T is temperature, single
Position is DEG C；
S3, it is obtained according to the power consumption calculation model of the consumption of vehicle aerodynamic power and auxiliary system under a state of cyclic operation
Vehicle energy consumption under a state of cyclic operation out, vehicle energy consumption is added as total vehicle energy consumption under each state of cyclic operation.
2. a kind of EV Energy Consumption calculation method according to claim 1, it is characterised in that: the tool of the step S1
Body calculating process are as follows:
The vehicle speed information in a state of cyclic operation is acquired by existing automobile data recorder, according to vehicle basic parameter and speed number
According to, it calculates vehicle aerodynamic power in a state of cyclic operation and consumes, calculation formula Pd=F*v, wherein
In formula: F is vehicle running resistance, unit N；υ is automobilism speed, unit m/s；G is complete vehicle weight, and unit is
N；F is coefficient of rolling resistance, dimensionless；θ is the inclination angle on road surface and horizontal plane, unit rad；CD is coefficient of air resistance, nothing
Dimension；A is vehicle front face area, unit m2.
3. a kind of EV Energy Consumption calculation method according to claim 1, it is characterised in that: the tool of the step S3
Body calculating process are as follows:
The consumption of vehicle aerodynamic power is added as whole under a state of cyclic operation with auxiliary system power consumption under one state of cyclic operation
The total power consumption of vehicle, i.e. Pz=Pf+Pd obtain one by integrating to the total power consumption of the vehicle under a state of cyclic operation
Vehicle energy consumption under a state of cyclic operation, i.e. Ez=∫ Pzdt, vehicle energy consumption is added as total vehicle energy consumption under each state of cyclic operation；
In formula: Pz is the total power consumption of vehicle, and unit is watt (W)；Ez is the vehicle energy consumption under a state of cyclic operation, and unit is
Ws, Pd are the consumption of vehicle aerodynamic power, and unit is watt (W)；Pf is the power consumption of operating condition auxiliary system, and unit is watt
(W)。
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| CN106202972B (en) * | 2016-08-03 | 2019-03-15 | 奇瑞商用车（安徽）有限公司 | The method of electric automobile power battery energy is determined under a kind of state of cyclic operation |
| CN106596135B (en) * | 2016-12-29 | 2017-09-19 | 吉林大学 | A kind of pure electric automobile actual travel energy consumption testing, evaluation and Forecasting Methodology |
| CN109752590B (en) * | 2019-01-28 | 2020-06-23 | 北京航空航天大学 | Electric bus energy consumption estimation method based on data driving |
| 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 |
| CN111696350B (en) * | 2020-06-10 | 2021-08-06 | 交通运输部科学研究院 | Electric bus local working condition evaluation method based on operation monitoring data |
| 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 |
| 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. |
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