WO2013023695A1

WO2013023695A1 - Charging station

Info

Publication number: WO2013023695A1
Application number: PCT/EP2011/064162
Authority: WO
Inventors: Alexander Kepka
Original assignee: Siemens Aktiengesellschaft
Priority date: 2011-08-17
Filing date: 2011-08-17
Publication date: 2013-02-21

Abstract

The invention relates inter alia to a method for operating a charging station (10) and for charging an electric vehicle (15) connected to the charging station (10). According to the invention the charging current or the charging power consumed by the electric vehicle (15) at the beginning of charging is measured with a measuring device (20) of the charging station (10) with the establishment of a measured value (Im(t=0), (Pm(t=0)); on the basis of the measured value (Im(t=0), (Pm(t=0)), a charging curve (Is2(t), Ps2(t)) is selected from a charging curve set (LSK) that comprises at least two charging curves (Is1(t), Is2(t), Is3(t), Is4(t), Ps1(t), Ps2(t), Ps3(t), Ps4(t)) and that is assigned to the charging station (10); and the charging process is carried out with the aid of the selected charging curve (Is2(t), Ps2(t)), in that in each case the charging station (10) specifies a maximum value for the electric vehicle (15) in time-dependent manner throughout the charging time (t), said maximum value determining the maximum charging current or the maximum charging power with which the electric vehicle (15) may be charged.

Description

description

charging station

The invention relates to a method for operating a charging station and for charging an electric vehicle connected to the charging station.

Charging stations for charging electric vehicles, for example, from the company Siemens and the product name

"Lot CP700A" sold.

The invention has for its object to provide a method for operating a charging station that reserves as few loading resources for the imple ^¬ tion of the respective charging during a charging process.

This object is achieved by a method having the features according to claim 1. Advantageous embodiments of the method according to the invention are specified in subclaims.

Thereafter, the invention provides that with a measuring ^{¬ device of} the charging station to the start of charge of the

Electric charging is taken in the form of a measured value, depending on the measured value, a La ^¬ curve is selected from a least two charging curves charging curve set, which is assigned to the charging station, and the charging process based on the selected Charging curve is performed by the electric vehicle from the charging station tion time-dependent on the charging time in each case a maximum value is specified, indicating the maximum charging current or the maximum charging power, with or with which the electric vehicle may charge.

An essential advantage of the method according to the invention is that it is already present at the beginning of each loading cycle. Operation allows a relatively accurate forecast on the resources required for the charging ^¬ resources in terms of maximum charging current and / or maximum charging power. Thus, according to the invention, the charge power or the requested charging current requested by the electric vehicle at the beginning of the charging process is detected and a suitable charge curve is selected from a given charge curve set, which is used as the basis for the further charging process. Based on the from the Ladekurvenset out ^¬ selected charging curve it is now possible, the necessary for the continued charging above the timeline resources, so the charging current required for charging or the charging power required for charging, very accurately predict and resources for the charging process to reserve accordingly. For example, it can be predicted at the beginning of each La ^¬ devorgangs been whether and to what extent the charging station for charging fewer resources will take (charge current / charge power), as are the charging station actually or usually available. The foreseeable resources that are not needed can, for example, be released by the charging station and made available to other charging stations for charging other electric vehicles. In other words, the method according to the invention makes it possible to optimally allocate resources to a plurality of charging stations in a very simple manner by making available the forecast data for the resource planning of other charging stations that is available at the start of charging on the basis of the selected charging curves.

According to a particularly preferred embodiment of the method it is provided that the vomit ^¬ cherten in the Ladekurvenset charging curves are corrected at regular or irregular intervals, or optimized. In this context, it is considered to be particularly advantageous if the charge current actually consumed by the electric vehicle during charging for charging or the charging power actually used is measured to form further measured values and the measured values for correction or optimization of the respective charging curve are used.

Preferably, in the context of the correction or optimization of the charging curve, the maximum value defined by the charging curve is at least partially reduced if the electric vehicle to be charged or a predetermined proportion of the electric vehicles already charged at the charging station never or not exhausted or exhausted the maximum value predetermined by the charging curve Has. By lowering the charging curve can be in a particularly advantageous manner it rich ^¬ that the charging station during the charging according to the charging curve always reserved only so much charging power / charging current, as is actually required.

A particularly simple and therefore advantageous can be a Cor ^¬ Correction or optimization perform "downward", by determining to be reduced by each maximum value of the charging curve in each case a predetermined difference value, which is a fixed Kon ^¬ stante or proportional to to be corrected maximum ^¬ value variable is subtracted from each of ^{¬ ¬} the maximum value of the charging curve.

If, however, found during charging that the charging curve is probably not enough charging power / charge current available, so it is considered advantageous if the maximum value defined by the charging curve is at least section-wise increased from ^¬ as part of the correction or optimization of the charging curve, when the electric vehicle to be loaded or a predetermined fraction of the already charged at the charging station electric vehicles has always or at least partly drawn from the predetermined maximum value of the charging curve from ^¬.

A correction of the charge curve "upwards" can be carried out in a particularly simple and therefore advantageous manner by adding to each maximum value of the charge curve to be increased a predetermined addition value which is a fixed predetermined constant or portional to be corrected maximum value is variable ^¬ telt ermit, is added to the respectively to be corrected maximum value of the charging curve.

In order to achieve the best possible course of the charging curve as part of the optimization and / or correction, it is considered advantageous if the correction or optimization steps are carried out for a plurality of different charging times of the charging curve.

To avoid having to load a single electric car emits an unreasonably large change in the charging curve to ^¬ occurs, it is considered advantageous if for each La ^¬ dezeitpunkt the charging curve for is to be a correction or Opti ^¬ ming, each of Current measured value of ak ^¬ currently charged electric vehicle and additionally a statis ^¬ tisches means of the measured values of the previously charged electric vehicles is used.

Especially simple and thus advantageous leaves a Opti ^¬ optimization or perform correction in consideration of a statistical means when each ^¬ weils the current measured value of current to be charged electric vehicle is taken into account with a predetermined weighting value for the charging time points.

The corrected or optimized charging curve formed during the charging process by correction or optimization can already be taken into account in the current charging process, in that the electric vehicle is charged further taking into account the optimized or corrected charging curve. Alternatively or additionally, it is possible to store the corrected or optimized charging curve formed during the charging process by correction or optimization in the charge curve set and to continue to use it for future charging processes instead of the previous charging curve. The invention also relates to a Ladesta ^¬ tion with an electrical connector for connecting an electric vehicle. According to the invention, the Ladesta ^¬ tion is characterized by a measuring means for measuring a measurement value of the indicates the height from the electric vehicle in claim ge ^¬ recessed charging current or the amount of withdrawn from the electric vehicle in claim charging power, and in communication with the measuring device control device, which is designed such that it selects a charging curve of an at least two loading curves comprehensive Ladekurvenset in dependence on the measured value, which is the charging station supplied ^¬ shown, and performs the charging process based on the selected charging curve by time-dependent in each case specifies the electric vehicle a maximum value, indicating the maximum charging ^¬ current or the maximum charging power with which or may charge the electric vehicle.

With regard to the advantages of the charging station according to the invention, reference is made to the above statements in connection with the method according to the invention, since the advantages of the method according to the invention essentially correspond to those of the charging station according to the invention.

The invention will be explained in more detail with reference to Ausführungsbeispie ^¬ len; thereby show exemplarily:

Figure 1 shows a first embodiment of a

charging station according to the invention, by means of which a variant of the method according to the invention is also exemplified,

2 shows an example of a Ladekurvenset comprising four Ladekur ^¬ ven,

Figure 3 shows a second embodiment of a

Charging station according to the invention, by means of which a further exemplary embodiment of the erfindungsge ^¬ Permitted method is explained, Figure 4 shows an embodiment for an optimized or corrected charging curve, which is determined during a charging process ^¬ gear,

Figure 5 shows a third embodiment of a

is charging station according to the invention, in which is formed an opti mized ^¬ charging curve stored and used for La ^¬, and

6 shows a fourth embodiment of a

Charging station according to the invention, in which a fourth embodiment of the Ver ^¬ drive ^according to the invention is carried out on the basis of power measurements.

For the sake of clarity, the same reference numbers are always used in the figures for identical or comparable components.

FIG. 1 shows a charging station 10, to whose connection A10 an electric vehicle 15 is connected in order to charge it with electrical energy. The charging station 10 is equipped with a measuring device 20 in the form of an ammeter, which measures the charging current with which the electric vehicle 15 is charged, and generates a corresponding current measured ^value Im (t). The current measured value Im (t) reaches a control device 30 of the charging station 10. The control device 30 may be, for example, a data processing device in the form of a computer. With the control device 30 is a memory 40 in connection, in which a control program P is stored. The control program P defines the mode of operation of the control device 30 and thus the mode of operation of the charging station

10th In addition, it can be seen in FIG. 1 that a charging curve set LKS is stored in the memory 40. The charging curve set comprises a plurality of charging curves, of which four charging curves are shown by way of example in FIG. 1 for the sake of clarity. The loading curves with the Be ^¬ Isl reference symbols (t), I s2 (t), Is3 (t) and Is4 (t) provided.

The charging station according to FIG. 1 can be operated, for example, as follows:

Is the electric vehicle 15 connected to the terminal A10 of the Ladesta ^¬ tion 10 and begin the charging operation, the measuring device 20 at the time t = 0 is a measured current value lm (t = 0) generate and transmit to the control device 30th The control device 30 evaluates the current measurement value at the time ^¬ point t = 0, by selecting a winding ^¬ charging from the Ladekurvenset LKS at which the charging current at the time t = coincides best 0 lm with the current measurement value (t = 0). This will be explained in more detail with reference to FIG 2.

FIG. 2 shows by way of example the charging curves Is1 (t), Is2 (t), Is3 (t) and Is4 (t) over time along the time axis t. In addition, the current measurement value lm (t = 0) is shown in FIG. It can be seen that the current measurement value lm (t = 0) is closer to the charging curve Is2 (t) than to other charging curves of the charging curve set LKS. The following applies:

I lm (t = 0) Is2 (t = 0) I lm (t = 0) - Isl (t = 0) I and

I lm (t = 0) Is2 (t = 0) I lm (t = 0) - Is3 (t = 0) I and

| lm (t = 0) Is2 (t = 0) I lm (t = 0) - Is4 (t = 0) I

The controller 30 is accordingly the charging curve Is2 from the Ladekurvenset LKS (t) to select and use them for the further charging operation ^¬.

Subsequently, the control device 30 will control a charging module 50 of the charging station 10 such that this is the charging electric vehicle 15 - be it via radio or via a in the figure 1, not shown control line (eg integrated in the charging cable) - in each case by the charging curve Is2 (t) pre ^¬ given maximum charging current or maximum current value notifies. In the electric vehicle 15 is thus the information as to how large the charging current or the charging power may be maximum at each charging time. The electric vehicle 15 will then charge in consideration of internal specifications and thereby do not exceed the predetermined charging current or the predetermined charging power; if this happens in the case of an error nevertheless, the charging station 10 will cancel the charging process.

In addition, the control device 30 at a further output BIO of the charging station 10, the selected charging curve Is2 (t) as a forecast for the resource requirements of the charging to a higher-level guide 100 transmit to the other, in the figure 1 for reasons of clarity is not ^¬ Asked charging stations are connected. The guide device 100 knows, based on the transmitted charge curve Is2 (t), to what extent the charging station 10 requires resources for the current charging process. The guide 100 can thus optimally distribute the total available total power to the charging stations, if the charging stations overall predict a greater power requirement than is available. If the power requirement is too great, the guide device 100 can request the charging stations via control signals to reduce the charging power. The charging stations can respond to such a request in a particularly simple manner by selecting a charging curve with a lower charging power from the existing charging curve set LKS. For example, the control device 100 can force a switching over from the charging curve Is2 (t) to one of the charging curves Is3 (t) or Is4 (t) via a control signal if the charging power is insufficient.

FIG. 3 shows a further exemplary embodiment of a charging station 10 according to the invention. In this ^exemplary embodiment, the control device 30 is additionally able to the charging curves stored in the charging curve set LKS

To optimize or correct Isl (t), Is2 (t), Is3 (t) and Is4 (t). This will be explained in detail below: First, the control device 30 operates in exactly the same way as the control device 30 according to FIG. 1. This means that, at the beginning of the charging process, it uses the current measurement value lm (t = 0) of the measuring device 20 to select a suitable charging curve. Here, it is assumed by way of example that the control device 30 will select the charging curve Is2 (t).

In addition, the control device 30 will undertake a correction or optimization of the charging curve Is2 (t) and form a corrected or optimized charging curve Is2 '(t). In this case, the control device 30 proceeds as follows, for example:

If the electric vehicle 15 never uses the maximum current value predetermined by the charging curve Is2 (t) for charging, or at least in sections, the control device 30 will at least partially reduce the charging curve Is2 (t) and form a reduced charging curve. Preferably, the STEU ^¬ ereinrichtung is 30, the charging curve Is2 (t) reduced if the difference between the respective maximum value Is2 (t) of the charging curve and the respective measured current value exceeding a specified first current difference value Igl exceeds Im (t), ie if:

Is2 (t) - it can be located is determined by a fixed predetermined constant or a value that proportio ^¬ nal to the respective maximum value Is2 (t) In (t)> Igl In the first current difference value Igl, han ^¬ spindles. If the control device 30 during the charging process towards ^¬ against determines that the electric vehicle 20 always makes full use of, or at least sections of the through the charging curve Is2 (t) predetermined maximum current value, the Steuereinrich- is 30 correct the charging curve Is2 (t) upward, which is symbolized in Figure 3 by an upward arrow. Such upward revision is preferential ^¬ carried out if:

Is2 (t) - Im (t) <Ig2, where Ig2 denotes a predetermined second current difference value. The second current difference value Ig2 may be a fixed constant or a value which is determined proportional to the respective maximum value Is2 (t).

FIG. 4 shows by way of example how a correction can look "upwards" and "downwards". You can see that through

Correction formed charging curve Is2 '(t) and the current measurement Im (t), which is formed by the measuring device 20. It can be seen that the charging curve Is2 '(t) to the current measuring ^¬ is worth adapted Im (t) by the charging curve is increased or decreased in order to achieve an adaptation to the profile of the current ^¬ measurement value Im (t).

The corrected or optimized charging curve formed as part of the correction or optimization of the charging curve Is2 (t)

Is2 '(t) is stored by the control device 30 is preferably in the Ladekurvenset LKS by the previous charging curve ^¬ is2 (t) by the corrected or optimized charging curve is2' (t) is replaced (see FIG. 3). The corrected or op ^¬-optimized charging curve Is2 '(t) can then be used in subsequent charging operations.

Alternatively or additionally, it is possible already during charging of the electric vehicle 15, the corrected or optimized charging curve ^¬ Is2 '(t) to be used. This is shown by way of example in FIG. In this embodiment, the control device 30 will release the released charging resources in the event of a reduction in the charging current or the charging power by providing the control device 100 with the corrected or optimized charging resources. Charging curve Is2 '(t) is communicated. The liberated Laderes ^¬ resources can then be used by the guide 100 for other charging stations. In the case of an intended increase in the charging current or an intentional increase in the charging power, the control device 30 will first poll the guide 100 by means of a request signal as to whether sufficient charging resources are available for an increase and only in the case of sufficient charging resources the intended increase of the charging current or intended increase of Ladeleis ^¬ tion actually perform. A request can be made in a simple manner in such a way that the control means 30 means only the "up" modified charging curve Is2 '(t) of the guiding notifies 100 and this is then reacted, so ^¬ far no warning or stop signal from the Guide 100 is returned.

In the embodiments according to Figures 1 to 5 of the charging current was measured in this example and the control method on the basis of a charging curve sets LKS with stored Stromla ^¬ dekurven Isl (t), I s2 (t), Is3 (t) and Is4 (t) is performed. In the same way the charge power with the formation of performance metrics Pm (t) may alternatively be measured and the control method on the basis of a charging curve sets LKS with stored power curves Psl (t), Ps2 (t), Ps3 (t) and Ps4 (t) Runaway ^¬ leads become. Such an embodiment shows an example ^¬ way of the figure 6. Pgl indicated in the figure 6 a first power difference value, and Pg2 indicated in the figure 6 a second power difference value. Incidentally, reference is made to the comments on the figures 1 to 5, which apply here accordingly.

Although the invention has been further illustrated and described in detail by the preferred embodiments, the invention is not limited by the disclosed examples and other variations can be made by those skilled in the art can be derived without departing from the scope of the invention.

Claims

claims

A method of operating a charging station (10) and charging a charging station (10) connected

Electric vehicle (15),

d a d u r c h e c e n c i n e s that

- With a measuring device (20) of the charging station (10) at the start of charge of the electric vehicle (15) claimed charging current or the charging power used to form a measured value (lm (t = 0), Pm (t = 0)) is measured

- As a function of the measured value (lm (t = 0), Pm (t = 0)) a charging curve (Is2 (t), Ps2 (t)) from an at least two charging ^¬ curves (Isl (t), Is2 (t ), Is3 (t), Is4 (t), Psl (t), Ps2 (t), Ps3 (t), Ps4 (t)), which is assigned to the charging station (10), and

- The charging process based on the selected charging curve (Is2 (t), Ps2 (t)) is performed by the electric vehicle (15) from the charging station (10) time-dependent over the charging time

(t), respectively, a maximum value is given, indicating the maxi ^¬ paint charging current or the maximum charging power, the electric vehicle (15) allows charging with the or with the.

2. The method according to claim 1,

d a d u r c h e c e n c i n e s that

- the charge current actually consumed by the electric vehicle (15) during the charging process for charging or the actual charging power consumed is measured to form further measured values (Im (t), Pm (t)), and

- The other measured values (Im (t), Pm (t)) are used to correct or optimize the respective charging curve (Is2 (t), Ps2 (t)).

3. The method according to claim 2,

characterized in that - in the context of correction or optimization of the charging curve (Is2 (t), Ps2 (t)) which is defined by the maximum charging curve ^¬ worth at least partially reduced,

- if the charging electric vehicle (15) or a

predetermined portion of the already charged at the charging station to the electric vehicle from the charging curve (Is2 (t), Ps2 (t)) preset maximum value never or at least as time ^¬ does not exhaust or exhausts.

4. Method according to one of the preceding claims, characterized in that

the maximum value defined by the charging curve (Is2 (t), Ps2 (t)) is at least partially reduced in the context of each correction or optimization step, by deriving from each maximum value of the charging curve (Is2 (t), Ps2 (t)) to be reduced ^¬ because a predetermined difference value, which is a fixed pre ^¬ bene constant or is determined proportional to the maximum value to be corrected, is deducted from the respective to kor ^¬ rigierenden maximum value of the charging curve (Is2 (t), Ps2 (t)).

5. Method according to one of the preceding claims, characterized in that

- in the context of correction or optimization of the charging curve (Is2 (t), Ps2 (t)) which is at least partially defined by the increased maximum charging curve ^¬ value,

- if the charging electric vehicle (15) or a

predetermined proportion of the already charged at the charging station electric vehicles has always exhausted from the charging curve (Is2 (t), Ps2 (t)) maximum value or at least temporarily.

6. The method according to claim 5,

d a d u r c h e c e n c i n e s that

of from the charging curve (Is2 (t), Ps2 (t)) defined maximum value in the frame of each correction or optimization step is at least partially increased by about each to he ^{¬-increasing} maximum value of the charging curve (Is2 (t), Ps2 (t) ) a given addition value, which is a fixed predetermined constant, or is determined proportional to the maximum value to be corrected va ^¬ riabel, is added to the respectively to be corrected Maxi ^¬ malwert the charging curve.

7. Method according to one of the preceding claims, characterized in that

the correction or optimization steps are performed for a plurality of different charging times of the charging curve.

8. The method according to any one of the preceding claims, d a d u r c h e c e n e c e s in that e

for each charging time of the charging curve (Is2 (t), Ps2 (t)), for which a correction or optimization is to take place, in each case the current measured value (Im (t), Pm (t)) of the currently charging electric vehicle (15) and In addition, a statistical average of the measured values of the previously charged electric vehicles is herangezo ^¬ gen.

9. Method according to one of the preceding claims, characterized in that

for the charging times in each case the current measured value (Im (t), Pm (t)) of the currently charged electric vehicle (15) is taken into account with a predetermined weighting value.

10. The method according to any one of the preceding claims, d a d u r c h e c e n e c e s in that e

the corrected or optimized charging curve (Is2 '(t) formed during the charging process by correction or optimization,

Ps2 '(t)) stored in the load curve set (LKS) and ^¬ terverwendet for ^¬ future charging operations instead of the previous charging curve.

11. charging station (10) with an electrical connection (A10) for connecting an electric vehicle (15),

marked by a measuring device (20) for measuring a measured value (Im (t), Pm (t)) which indicates the amount of charging current consumed by the electric vehicle (15) or the amount of charging power consumed by the electric vehicle, and

- One with the measuring device (20) in communication control device (30) which is designed such that it in dependence on the measured value (Im (t), Pm (t)) a charging curve (Is2 (t), Ps2 (t ()) of an at least two loading ^¬ curves comprehensive Ladekurvenset (Isl t), Is2 (t), Is3 (t), Is4 (t), PSL (t), Ps2 (t), Ps3 (t), Ps4 (t )) selects, which is assigned to the loading station (10), and the charging process (using the selected charging curve Is2 (t), Ps2 (t)) performs ^¬ by (the electric vehicle 15) time-dependent per ^¬ weils predetermines a maximum value, indicating the maximum charging ^¬ current or the maximum charging power with which or with which the electric vehicle (15) may charge.