1. A public direct current charging pile charging service level evaluation method is characterized by comprising the following steps: s1, acquiring data parameters influencing the charging service level of the public direct current charging pile;

s2, establishing an evaluation index for the data parameters acquired in the step S1;

and S3, performing overall evaluation on the charging service level of the public direct current charging pile based on the evaluation index established in the step S2.

2. The method according to claim 1, wherein the method comprises the following steps: the data parameters acquired in step S1 include: a charging compatibility evaluation data parameter, a charging speed evaluation data parameter, and a charging price evaluation data parameter.

3. The method according to claim 2, wherein the method comprises the following steps: in step S1, the charge compatibility evaluation data parameters include the number of vehicles trying to establish charge communication with the common dc charging post and the number of vehicles completing charging;

the charging speed evaluation data parameters comprise the vehicle state of charge (SOC) at the beginning of charging, the vehicle state of charge (SOC) at the end of charging, the total time of vehicle charging and the number of vehicles finishing charging;

the charge price evaluation data parameters include the total charge amount and the total charge cost of the vehicle.

4. The method of claim 3, wherein the method comprises the following steps: the evaluation index established in step S2 includes:

establishing a charging compatibility evaluation index for the charging compatibility evaluation data parameter obtained in the step S1, wherein the charging compatibility evaluation is an index indicating a probability P that the public direct-current charging pile can successfully complete charging services for different electric vehicles, and the specific formula is as follows:

s means the number of vehicles attempting to establish charging communication, N means the number of vehicles completing charging;

establishing a charging speed evaluation index for the charging speed evaluation data parameter obtained in the step S1, where the charging speed evaluation index is an average value X of SOC increases of the electric vehicle using the public dc charging pile in unit time, and the specific formula is as follows:

n refers to the number of vehicles which finish charging, Y refers to the state of charge (SOC) of the vehicles at the beginning of charging, Z refers to the SOC of the vehicles at the end of charging, and H refers to the total time of charging;

establishing a charging price evaluation index for the charging price evaluation data parameter obtained in the step S1, wherein the charging price evaluation index is an average charging unit price D of the electric vehicle using the public direct-current charging pile, and the specific formula is as follows:

n refers to the number of vehicles completing charging, T refers to the charging capacity of the electric vehicle, and S refers to the charging cost of the electric vehicle.

5. The method of claim 4, wherein the method comprises the following steps: the specific formula for integrally evaluating the charging service level of the public direct-current charging pile in the step S3 is as follows:

G＝P*[X+(1/D)]

the higher the value of G, the higher the charging service level of the public direct current charging pile is.

Background

With the rapid development of the electric automobile industry, the sales volume and the retention volume of electric automobiles are also rapidly increased, more and more people start to choose to purchase and use the electric automobiles, and the charging behaviors of the electric automobiles become more common gradually; the charging piles are equipment for providing energy supply for the electric automobiles, except that a small number of electric automobile owners can install private charging piles, most of the electric automobile owners need to use public charging piles to charge the electric automobiles, the public charging piles can be divided into public direct current charging piles and public alternating current charging piles according to different structures, the electric quantity charged by the public direct current charging piles to the electric automobiles accounts for more than 90% of the electric quantity charged by the public charging piles at present according to statistics, the number of the public direct current charging piles in China currently exceeds 34 thousands according to latest statistics, and the number of the public direct current charging piles can be continuously increased along with the increase of the reserved quantity of the electric automobiles;

at present, the quality of public direct current charging piles in the society is uneven, and the use experience and the use cost are greatly different, so that troubles are brought to the owner of an electric automobile when the owner selects the public direct current charging pile, the 'charging difficulty' becomes a big problem of the electric automobile, but at present, a practical method aiming at the evaluation of the public direct current charging pile is not provided at all, the charging service level of the public direct current charging pile is qualitatively and quantitatively analyzed and evaluated, a basis cannot be provided for the owner of the electric automobile to select the public direct current charging pile, and in the past, the whole service level of the public direct current charging pile cannot be effectively improved, the 'charging difficulty' problem also tends to trouble the owner of the electric automobile for a long time, the use experience of the electric automobile is greatly reduced, and the popularization of the electric automobile in China is greatly influenced; therefore, the method for evaluating the charging service level of the public direct current charging pile is provided.

Disclosure of Invention

In view of the above, the present invention is directed to provide a method for evaluating a charging service level of a public dc charging pile, so as to solve the problem that the charging service level of the public dc charging pile cannot be qualitatively and quantitatively analyzed and evaluated at present.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a public direct current charging pile charging service level evaluation method comprises the following steps: s1, acquiring data parameters influencing the charging service level of the public direct current charging pile;

s2, establishing an evaluation index for the data parameters acquired in the step S1;

and S3, performing overall evaluation on the charging service level of the public direct current charging pile based on the evaluation index established in the step S2.

Further, the data parameters acquired in step S1 include: a charging compatibility evaluation data parameter, a charging speed evaluation data parameter, and a charging price evaluation data parameter.

Further, in step S1, the charge compatibility evaluation data parameters include the number of vehicles trying to establish charge communication with the common dc charging post and the number of vehicles completing charging;

the charging speed evaluation data parameters comprise the vehicle state of charge (SOC) at the beginning of charging, the vehicle state of charge (SOC) at the end of charging, the total time of vehicle charging and the number of vehicles finishing charging;

the charge price evaluation data parameters include the total charge amount and the total charge cost of the vehicle.

Further, the evaluation index established in step S2 includes:

establishing a charging compatibility evaluation index for the charging compatibility evaluation data parameter obtained in the step S1, wherein the charging compatibility evaluation is an index indicating a probability P that the public direct-current charging pile can successfully complete charging services for different electric vehicles, and the specific formula is as follows:

s means the number of vehicles attempting to establish charging communication, N means the number of vehicles completing charging;

establishing a charging speed evaluation index for the charging speed evaluation data parameter obtained in the step S1, where the charging speed evaluation index is an average value X (unit: 1/h) of the SOC increase of the electric vehicle using the public direct-current charging pile in unit time, and the specific formula is as follows:

n refers to the number of vehicles that have finished charging, Y refers to the vehicle state of charge SOC at the beginning of charging, Z refers to the vehicle state of charge SOC at the end of charging, and H refers to the total time (unit: H) of charging;

establishing a charging price evaluation index for the charging price evaluation data parameter obtained in the step S1, where the charging price evaluation index is an average charging unit price D (unit: (rmh)) of the electric vehicle using the public direct-current charging pile, and the specific formula is as follows:

n refers to the number of vehicles that have finished charging, T refers to the electric vehicle charging amount, (unit: kwh), and S refers to the electric vehicle charging cost, (unit:).

Further, the specific formula for the overall evaluation of the charging service level of the public direct current charging pile in step S3 is as follows:

G＝P*[X+(1/D)]

the higher the value of G, the higher the charging service level of the public direct current charging pile is.

Compared with the prior art, the method for evaluating the charging service level of the public direct current charging pile has the following beneficial effects:

the public direct current charging pile charging service level evaluation method integrates three core factors which influence the charging service level, namely the probability of charging service completion of different electric vehicles, the increment of the SOC of the vehicle in unit time and the average charging unit price, and finally obtains a reasonable and effective evaluation value for the selection of the owners of the electric vehicles.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a flowchart of a method for evaluating a charging service level of a common dc charging pile according to an embodiment of the present invention.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1, a method for evaluating a charging service level of a public dc charging pile includes the following steps: s1, acquiring data parameters influencing the charging service level of the public direct current charging pile;

s2, establishing an evaluation index for the data parameters acquired in the step S1;

and S3, performing overall evaluation on the charging service level of the public direct current charging pile based on the evaluation index established in the step S2.

The data parameters acquired in step S1 include: a charging compatibility evaluation data parameter, a charging speed evaluation data parameter, and a charging price evaluation data parameter.

In step S1, the charge compatibility evaluation data parameters include the number of vehicles trying to establish charge communication with the common dc charging post and the number of vehicles completing charging;

the charging speed evaluation data parameters comprise the vehicle state of charge (SOC) at the beginning of charging, the vehicle state of charge (SOC) at the end of charging, the total time of vehicle charging and the number of vehicles finishing charging;

the charge price evaluation data parameters include the total charge amount and the total charge cost of the vehicle.

The evaluation index established in step S2 includes:

establishing a charging compatibility evaluation index for the charging compatibility evaluation data parameter obtained in the step S1, wherein the charging compatibility evaluation is an index indicating a probability P that the public direct-current charging pile can successfully complete charging services for different electric vehicles, and the specific formula is as follows:

s means the number of vehicles attempting to establish charging communication, N means the number of vehicles completing charging;

establishing a charging speed evaluation index for the charging speed evaluation data parameter obtained in the step S1, where the charging speed evaluation index is an average value X of SOC increases of the electric vehicle using the public dc charging pile in unit time, and the specific formula is as follows:

n refers to the number of vehicles which finish charging, Y refers to the state of charge (SOC) of the vehicles at the beginning of charging, Z refers to the SOC of the vehicles at the end of charging, and H refers to the total time of charging;

establishing a charging price evaluation index for the charging price evaluation data parameter obtained in the step S1, wherein the charging price evaluation index is an average charging unit price D of the electric vehicle using the public direct-current charging pile, and the specific formula is as follows:

n refers to the number of vehicles completing charging, T refers to the charging capacity of the electric vehicle, and S refers to the charging cost of the electric vehicle.

The specific formula for integrally evaluating the charging service level of the public direct-current charging pile in the step S3 is as follows:

G＝P*[X+(1/D)]

the higher the value of G, the higher the charging service level of the public direct current charging pile is.

In case one, the public direct current charging pile has 30 vehicles to try to establish charging communication within one week, wherein 24 vehicles successfully complete charging, the probability of completing charging service is 0.80, the SOC increase average value of the 24 vehicles in unit time is 0.5/h, the sum of the charging electric quantity of the 24 vehicles is 750kwh, the total charging cost is 10500 th, the average charging unit price is 1.4 th/kwh, and the overall evaluation of the charging service level of the case one public direct current charging pile is 0.97.

In case two, the common direct current charging pile has 40 vehicles trying to establish charging communication within one week, wherein 35 vehicles successfully complete charging, the charging service probability is 0.875, the average value of the SOC increase of the 25 vehicles in unit time is 0.6/h, the sum of the charging electric quantity of the 24 vehicles is 1200kwh, the total charging cost is 1440 th, the average charging unit price is 1.2 th/kwh, and the overall evaluation of the charging service level of the common direct current charging pile in case two is 1.25.

After the method for integrally evaluating the charging service level of the public direct current charging pile based on the charging compatibility, the charging speed and the charging price is applied, the charging service level of the public direct current charging pile in the scheme two can be qualitatively and quantitatively known to be higher than that of the public direct current charging pile in the scheme one, as shown in the table 1,

evaluation angle	Specific items	Scheme one	Scheme two
				Charge compatibility	Probability of completing charging service	0.8	0.875
Speed of charging	Mean value of increase in SOC per unit time (unit: 1/h)	0.5	0.6
				Charging price	Average charging unit price (unit:/kwh)	1.4	1.2
Overall charging service level	Overall evaluation of charging service level of public direct current charging pile	0.97	1.25

From the results of table 1, it can be seen that because the charging compatibility of the two public direct current charging piles of scheme is better, and charging speed and charging price are all more advantageous, it is more outstanding to also can be fine embody the two public direct current charging piles of scheme than the scheme from whole evaluation value, and the electric automobile owner can select the better public direct current charging pile of whole charging service level to charge for electric automobile according to the whole evaluation value of public direct current charging pile charging service level.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.