DE102018005797A1 - A method of estimating the time required for a full charge of a rechargeable electrochemical energy storage device - Google Patents

Abstract

The invention relates to a method for estimating the required period for full charge of a rechargeable electrochemical energy storage device based on two time duration estimates, a first "static" duration estimate based on pre-parametric load profiles, and a second "dynamic" one. Time duration estimation based on at least one recent detected charging profile due to a real charging stored in a data storage device. A weighting of the two duration estimates is made depending on the aging condition of the rechargeable electrochemical energy storage device. Θ = static charging time θ = dynamic charging time ω and ω = weighting factors; ω + ω = 1Bstart life (SoH = 1): ω = 0.9 (preferably 0.7); ω = 0.1 (preferably 0.3) End life (SoH = eg 0.8) ω = eg 0.5; The present invention also relates to a control device configured for carrying out the method as well as to a motor vehicle which can be driven at least by an electric motor with the control device.

Description

The invention relates to a method for estimating the time required for a full charge of a rechargeable electrochemical energy storage device. Furthermore, the invention relates to an electronic control device which is set up for carrying out the method, as well as a motor vehicle which can be driven at least also by an electric motor with a traction battery and the control device.

Due to dwindling fossil fuels and the resulting rising fuel prices on the basis of such raw materials as well as anthropogenic carbon dioxide emissions and associated climate changes, the topics of energy supply have become increasingly renewable in recent years Energy and electromobility have become the focus of interest.

Rechargeable, electrochemical energy stores (secondary batteries), in particular rechargeable lithium-ion batteries, are currently playing a dominant role both in the field of renewable energies and in the area of electromobility.

As is known to those skilled in the art, currently available, rechargeable, electrochemical energy stores, more specifically the rechargeable, electrochemical energy storage cells of secondary batteries (which will hereafter be referred to simply as "battery cells" for simplicity), exhibit calendar and / or cyclic aging behavior through different chemical and physical processes which, over the life of a secondary battery, typically manifests itself in capacity loss, lower power, higher internal resistance (lower efficiency), more waste heat, and possibly also gas formation.

Due to the capacity loss occurring during the life of a secondary battery, i. the decreasing amount of storable electrical energy through the battery cells shortens the charge time required for charge over a lifetime of a secondary battery, based on a given initial state of charge (SoC), the desired charge state at full charge (SoC of eg. 98%, 99% or 100%) and the respective charging capacity of the charging device used.

Also, currently available secondary batteries are not charged at a constant power. Thus, for example, when reaching a SoC of about 80% of a linear charging (with constant charging power) to a degressive charging power is passed (controlled for example. By a battery management system) to avoid damage to the secondary battery.

Due to the resulting overall different charging profiles, the required duration of the charging time of a secondary battery, based on a given initial state of charge (SoC), may vary the desired charge state at full charge and the charging device used.

However, the most accurate estimation of the required duration of the charging time of a secondary battery to full charge is desirable for various reasons. Thus, for example, a user of a vehicle which can also be driven by an electric motor (purely battery-electric vehicle, hybrid serial vehicle, plug-in hybrid vehicle, etc.) can detect on the basis of such an estimate whether or how far the secondary battery (traction battery) his vehicle until the next intended use. This can help alleviate or prevent a so-called "range anxiety" from users of such vehicles.

Also, in a vehicle fleet, the load of the charging infrastructure can be optimally planned when the most accurate estimates of the duration of the charging time to full charge of the rechargeable, electrochemical energy storage device of the vehicles of the fleet are available.

It is also known that, for example, in the case of rechargeable lithium-ion batteries, a full charge state, which is given over a longer period of time without the rechargeable lithium-ion battery being (partially) discharged again, adversely affects the life of the rechargeable lithium-ion battery. Ion batteries can affect. Therefore, it may be advantageous if a charge is controlled to end shortly before a planned use of the rechargeable lithium-ion battery, for which an accurate estimate of the required charging time to determine the start of the charging process is helpful.

Against the background of this latter aspect, the EP 2 725 685 A1 a charging device for a vehicle-side energy storage device for electrical energy, with the means of a vehicle external power source electrical energy can be loaded into the energy storage device. A controller of the loader determines a charge start time using an estimated charge time period and a load inputted by a user. End time, and begins the charging process using the vehicle external power source when the charge start time is reached. The controller makes an adjustment of a parameter relevant to a factor that affects the estimation of the charging period, such as the actual capacity due to aging of the energy storage device, and estimates the charging period using the adjusted parameter to the accuracy of the estimation to improve the charging time period.

It is an object of the present invention to provide a method, which is improved in comparison with the known prior art, for estimating the charging time duration of a rechargeable, electrochemical energy storage device, for example a rechargeable traction battery of a motor vehicle which can also be driven by an electric motor, and a control device which is set up to carry out the method. to provide. It is a further object of the present invention to provide a motor vehicle, which can be driven at least by electric motor, with a traction battery which has an electronic control device according to the invention.

These objects are achieved by the method according to claim 1, the control device according to claim 7 and the motor vehicle according to claim 8. Advantageous developments and refinements of the invention are the subject of the dependent claims.

According to the invention, a method is proposed for estimating the time duration required for a full charge of a rechargeable, electrochemical energy storage device of a motor vehicle which can be driven by an electric motor using an external electric vehicle charging device, by means of an electronic control device configured for this purpose.

1. a) Ermittlung des Ladezustands der wiederaufladbaren, elektrochemischen Energiespeichervorrichtung zu Beginn eines Ladevorgangs;
2. b) Ermittlung der Ladeleistung der fahrzeugexternen Ladevorrichtung zu Beginn des Ladevorgangs,
3. c) Ermittlung der sich aufgrund von a) und b) ergebenden Zeitdauer θ_p für eine Vollladung der wiederaufladbaren, elektrochemischen Energiespeichervorrichtung unter Verwendung von in einer ersten elektronischen Daten-Speichereinrichtung für verschiedene Ladeleistungen gespeicherten, gemessenen oder berechneten Ladeprofilen der wiederaufladbaren, elektrochemischen Energiespeichervorrichtung im Neuzustand;
4. d) Ermittlung der sich aufgrund von a) und b) ergebenden Zeitdauer θ_h für eine Vollladung der wiederaufladbaren, elektrochemischen Energiespeichervorrichtung unter Verwendung von wenigstens dem in der ersten oder einer davon verschiedenen zweiten elektronischen Daten-Speichereinrichtung gespeicherten neuesten, gemessenen Ladeprofil der wiederaufladbaren, elektrochemischen Energiespeichervorrichtung; und
5. e) Abschätzung durch die Steuereinrichtung der erforderlichen Zeitdauer für eine Vollladung der wiederaufladbaren, elektrochemischen Energiespeichervorrichtung durch Bildung der Summe der mit einem Gewichtungsfaktor ω_p multiplizierten Zeitdauer θ_p gemäß c) und der mit einem Gewichtungsfaktor ω_h multiplizierten Zeitdauer θ_h gemäß d), wobei die Summe der beiden Gewichtungsfaktoren ω_p und ω_h 1 ist, der Wert des Gewichtungsfaktors ω_p für die Zeitdauer θ_p gemäß c) mit zunehmender Alterung der wiederaufladbaren, elektrochemischen Energiespeichervorrichtung kleiner als der Wert dieses Gewichtungsfaktors ω_p im Neuzustand der wiederaufladbaren, elektrochemischen Energiespeichervorrichtung gewählt wird, und der Wert des Gewichtungsfaktors ω_h für die Zeitdauer θ_h gemäß d) mit zunehmender Alterung der wiederaufladbaren, elektrochemischen Energiespeichervorrichtung größer als der Wert dieses Gewichtungsfaktors ω_h im Neuzustand der wiederaufladbaren, elektrochemischen Energiespeichervorrichtung gewählt wird.

The method comprises the following steps:

1. a) determination of the state of charge of the rechargeable, electrochemical energy storage device at the beginning of a charging process;
2. b) determination of the charging power of the vehicle-external charging device at the beginning of the charging process,
3. c) determining the period of time θ _p resulting from a) and b) for a full charge of the rechargeable electrochemical energy storage device using charging profiles of the rechargeable electrochemical energy storage device stored in a first electronic data storage device for different charging powers, measured or calculated ;
4. d) determining the period of time θ _h resulting from a) and b) for a full charge of the rechargeable electrochemical energy storage device using at least the newest measured charging profile of the rechargeable electrochemical cell stored in the first or a different second electronic data storage device energy storage device; and
5. e) estimating by the control means of the required time for full charging of the rechargeable electrochemical energy storage device by forming the sum of a weighting factor ω _p multiplied period θ _p according to c) and by a weighting factor ω _h multiplied time θ _h according to d), wherein the sum of the two weighting factors ω _p and ω _h 1, the value of the weighting factor ω _p for the period θ _p according to c) with increasing aging of the rechargeable, electrochemical energy storage device is smaller than the value of this weighting factor ω _p in the new state of the rechargeable, electrochemical energy storage device is chosen, and the value of the weighting factor ω _h for the period θ _h according to d) with increasing aging of the rechargeable, electrochemical energy storage device greater than the value of this weighting factor ω _h in the new state of the rechargeable, elektroche mix energy storage device is selected.

This means, in other words: $$\begin{array}{l}\text{estimated charging time}={\theta }_p{\omega }_p+{\theta }_H{\omega }_H\\ \begin{array}{ll}\text{in which}\hfill & {\omega }_{p-\text{new state}}>{\omega }_{\text{p}-\text{aged condition}.}\text{and}\hfill \\ \hfill & {\omega }_{H-\text{new state}}<{\omega }_{H-\text{aged condition}}\hfill \end{array}\end{array}$$

In the method according to the invention, for the estimation of the required period of time for a full charge of a rechargeable, electrochemical energy storage device (eg a traction battery), "static" charging profiles are used, ie charging profiles, for example from the manufacturer of the rechargeable, electrochemical energy storage device for different charging powers Be made available or at the beginning of the use of the rechargeable electrochemical energy storage device (ie when the energy storage device is still in new condition) actually determined by a user and / or optionally also by way of Simulation calculations are created. These static charging profiles are stored in a first data storage device and are not changed during the life of the rechargeable electrochemical energy storage device.

On the other hand, in the method according to the invention for the estimation of the required period of time for the full charge of the rechargeable, electrochemical energy storage device "dynamic" charging profiles are used. Such dynamic charging profiles depict the actual courses of charging processes of the rechargeable, electrochemical energy storage device. In this case, different charging profiles can be detected and stored, such as those resulting from different charging powers and / or starting from different charging states at the beginning of a charging process.

According to the invention, the state of charge (SoC) of the rechargeable, electrochemical energy storage device and the charging current of the charging device are determined at the beginning of a charging process and resulting directly from the static charging profiles (if a static charging profile exists for the given charging power) or calculable (if for the given charging power no immediately "matching" charging profile exists) required time θ _{p determined} until full charge, in which case - as already mentioned above - charging profiles are used in the new state of the rechargeable electrochemical energy storage device.

Furthermore, at the beginning of a charging process, the given charging power of the charging device is compared with at least the last measured dynamic charging profile and read therefrom, taking into account the initial state of charge of the rechargeable electrochemical energy storage device either the required period of time θ _h to full charge (if the given charging power with the charging power coincides with the last detected charging) or determined (when the given charging power with the charging power at the last detected charging does not match), wherein the time period θ _h to full charge and the state of health (SoH, State of Health) of the rechargeable, electrochemical energy storage device is dependent.

The thus resulting, in particular in the case of aged rechargeable, electrochemical energy storage devices regularly different durations θ _p and θ _h are multiplied depending on the aging state of the rechargeable electrochemical energy storage device with a correspondingly adapted weighting factor ω _p or ω _h and the resulting two durations added, whereby, according to the invention, the estimated charge time for the full charge of the rechargeable electrochemical energy storage device is obtained.

Various parameters may be used to determine the state of aging (SoH) of a rechargeable electrochemical energy storage device, such as internal resistance, actual capacitance, self-discharge, number of charge-discharge cycles, charge-end voltage, etc. In a rechargeable electrochemical energy storage device For all parameters considered values corresponding to those of a new rechargeable electrochemical energy storage device, the SoH is given as 100% or 1. If the value in a rechargeable electrochemical energy storage device of at least one of the parameters considered is lower than specified for a new rechargeable electrochemical energy storage device, the SoH is given as <100% or <1. For rechargeable electrochemical energy storage devices, depending on the application and / or type of rechargeable electrochemical energy storage device, an SoH value is often defined (eg, SoH = 80% and 0.8, respectively), reaching one end of life of the rechargeable electrochemical Energy storage device is assumed.

According to the present invention, the weighting factors ω _p and ω _h can be adapted in any suitable manner to the particular given SoH of a rechargeable, electrochemical energy storage device, for example proportionally, disproportionately or disproportionately.

1. a) ein Wert von 0,9, bevorzugt 0,7, für den Gewichtungsfaktor ω_p der Zeitdauer θ_p gemäß obigem Punkt c) für die wiederaufladbare, elektrochemische Energiespeichervorrichtung im Neuzustand gewählt, und wird der Wert dieses Gewichtungsfaktors ω_p bis hin zum Erreichen des Endes der Nutzungsdauer der wiederaufladbaren, elektrochemischen Energiespeichervorrichtung auf 0,5 abgesenkt, und
2. b) ein Wert von 0,1, bevorzugt 0,3, für den Gewichtungsfaktor ω_h der Zeitdauer θ_h gemäß obigem Punkt d) für die wiederaufladbare, elektrochemische Energiespeichervorrichtung im Neuzustand gewählt, und wird der Wert dieses Gewichtungsfaktors ω_h bis hin zum Erreichen des Endes der Nutzungsdauer der wiederaufladbaren, elektrochemischen Energiespeichervorrichtung auf 0,5 angehoben.

Advantageously, in the method according to the present invention

1. a) a value of 0.9, preferably 0.7, for the weighting factor ω _{p of} the period θ _p according to the above point c) is selected for the rechargeable, electrochemical energy storage device in the new state, and is the value of this weighting factor ω _p to reach the end of the useful life of the rechargeable, electrochemical energy storage device is lowered to 0.5, and
2. b) a value of 0.1, preferably 0.3, for the weighting factor ω _{h of} the period θ _h according to the above point d) is selected for the rechargeable, electrochemical energy storage device in the new state, and the value of this weighting factor ω _h until reaching of the end of the life of the rechargeable electrochemical energy storage device is increased to 0.5.

mit: ω_p = 0,9, bevorzugt 0,7; ω_h = 0,1, bevorzugt 0,3
bei Neuzustand (Gesundheitszustand bzw. State of Health = 100% bzw. 1) der wiederaufladbaren, elektrochemischen Energiespeichervorrichtung, und
mit: ω_p = bspw. 0,5; ω_h = bspw. 0,5
bei Ende der Nutzungsdauer (bei Gesundheitszustand bzw. State of Health von bspw. 80% bzw. 0,8) der wiederaufladbaren, elektrochemischen Energiespeichervorrichtung This means, in other words: $$\text{estimated charging time}={\theta }_p{\omega }_p+{\theta }_H{\omega }_H$$

with: ω _p = 0.9, preferably 0.7; ω _h = 0.1, preferably 0.3
at Neuzustand (State of Health = 100% or 1) of the rechargeable, electrochemical energy storage device, and
with: ω _p = eg 0.5; ω _h = eg 0.5
at the end of the useful life (state of health of, for example, 80% or 0.8, respectively) of the rechargeable electrochemical energy storage device

Also advantageously, in the method for determining the period of time θ _h for a full charge of the rechargeable electrochemical energy storage device according to item d) above, a plurality of the last charging profiles of the rechargeable electrochemical cells stored in the first or a different second electronic data storage device Energy storage device can be used, wherein from the plurality of charging profiles, for example, an average value for the period of time θ _h according to the above point d) can be calculated or estimated.

In order to be able to determine from the last measured charging profiles those which are actually, for example, the last five, six, seven, eight, nine or ten loading profiles, it is advantageous if the data of the loading profiles each have a date and time stamp are provided.

In particular, in order to keep the required storage capacity for the first data storage device as low as possible, it is for the determination of the time period θ _p according to the above point c) advantageous if stored in the first electronic data storage device static charging profiles in which fixed Measured time intervals measured values or were calculated or simulated for fixed time intervals measured values, the time intervals may be selected differently depending on the charging power.

Thus, for example, it may be provided that at a charging power of 60 kW a measuring point is recorded, calculated or estimated after each hour, with a charging power of 100 kW one measuring point every 45 minutes, with a charging power of 150 kW one measuring point every 30 minutes with a charging power from 200kW a measuring point every 20 minutes and at a charging power of 300kW a measuring point every 15 minutes. Of course, these values are to be understood as purely exemplary and, given a sufficient storage capacity, may of course also be shorter.

It is also advantageous if in the inventive method or one of its advantageous developments and refinements as a second electronic data storage device, a FIFO data storage device is used and upon reaching the memory limit of the FIFO data storage device respectively the oldest charging profile by the youngest Loading profile is replaced.

In the method according to the invention or one of its advantageous developments and refinements, provision can furthermore be made for the estimated time duration to be output by the control device to a vehicle-side and / or vehicle-external device after estimating the required time duration for a full charge of the rechargeable, electrochemical energy storage device.

In this case, the data can be output in any desired manner, for example by wire or wireless, and the estimated time can be determined by the vehicle-side and / or vehicle-external device (for example, vehicle-external computing device, mobile terminal, etc.) in any desired manner be further processed, for example. In the form of a display by means of a screen and / or an acoustic reproduction by means of a loudspeaker. Furthermore, the estimated time duration can be used by the control device as well as by the vehicle-side and / or vehicle-external device (other than the control device) for further methods and devices and / or forwarded to other devices.

Also included in the present invention is an electronic control device, which is characterized in that it is set up to carry out the method according to the invention or one of its advantageous developments and refinements.

Furthermore, the present invention comprises a motor vehicle, which can be driven at least by electric motor, with a traction battery, which is characterized in that it has an electronic control device according to the invention.

Since the method of operation, the possible structure and possible interaction of the devices / devices / components / elements required and / or usable for the method according to the present invention, the inventive control device and the motor vehicle according to the invention are known, this application does not need to be described in detail To be received.

Further advantages, features and details of the invention will become apparent from the following description of the drawings. The features and feature combinations mentioned above in the description as well as the features and feature combinations mentioned below in the description of the figures and / or shown alone in the figures can be used not only in the respectively specified combination but also in other combinations or in isolation, without the scope of To leave invention.

• 1 eine beispielhafte, graphische Darstellung von in der ersten Daten-Speichereinrichtung gespeicherte, statische Ladeprofile bei verschiedenen Ladeleistungen;
• 2 eine beispielhafte, graphische Darstellung von in der ersten oder zweiten Daten-Speichereinrichtung gespeicherte, dynamische, mit einem Datums- und Zeit-Stempel versehene Ladeprofile;
• 3 eine beispielhafte, graphische Darstellung einer elektronischen Steuereinrichtung (ECU) gemäß der vorliegenden Erfindung.

Showing:

• 1 an exemplary graphical representation of stored in the first data storage device static charging profiles at different charging powers;
• 2 an exemplary, graphical representation of stored in the first or second data storage means, dynamic, provided with a date and time stamp load profiles;
• 3 an exemplary graphical representation of an electronic control unit (ECU) according to the present invention.

In the figures, the same elements and functionally identical elements are provided with the same reference numerals.

1 shows an exemplary graphical representation of stored in the first data storage device, static charging profiles at different charging powers (here purely exemplary charging power of 60kW, 100kW, 150kW, 200kW and 300kW) of a rechargeable, electrochemical energy storage device when new. Of course, different charging profiles can be stored at lower and / or higher charging powers in the first data storage device, for example, lower charging powers in the range of 11kW to 20kW, as they can be provided by so-called "wall boxes".

Also, it is not necessary that charging profiles are stored from a SoC of 0%. Since a linear charging process is often used up to a SoC of about 80%, it may be sufficient, for example, to store only charging profiles starting at a SoC of 10% or 15%. These are also SoC regions where rechargeable electrochemical energy storage devices (such as traction batteries) are often connected to rechargers for recharging.

As in 1 For example, due to the static charging profiles stored in the first data storage device, a charging period θ _p for a rechargeable, electrochemical energy storage device when new at a charging power of 100kW from a SoC of 22% to full charge (assumed here at 98% SoC).

2 shows an exemplary graphical representation of stored in the first or a second data storage device, dynamic, with a date and time stamped charging profiles of the rechargeable, electrochemical energy storage device. As 2 can be taken, the dynamic charging profiles can be detected both at very different, initial SoC the rechargeable electrochemical energy storage device and have also been created on the basis of different charging power. In 2 are stored purely by way of example the last five loading profiles, it can of course also be stored more or less loading profiles, but at least one charging profile, preferably the last (in the case of 2 the loading profile with the date and time stamp 2018-02-01 11:30).

On the basis of the "current", ie the last dynamic charging profile or the last dynamic charging profiles, a period of time θ _h for the full charge (in the example according to FIG 2 starting from a SoC of 22%) of the rechargeable electrochemical energy storage device.

The estimation of the required period for the full charge of a rechargeable, electrochemical energy storage device according to the invention is not limited to the evaluation of the last dynamic or some last dynamic charging profiles, since these charging profiles may be subject to errors and only a more or less good statistical approximation to the actual Represent charging behavior of the rechargeable, electrochemical energy storage device.

For this reason, the method according to the present invention is based on two estimates, a "static" estimate based on pre-parametric load profiles, and another "dynamic" estimate based on at least one last (ie recent) load profile included in a Data storage device during charging during the life of the rechargeable electrochemical energy storage device (secondary battery) is stored.

At the beginning of the life of the rechargeable electrochemical energy storage device, the static estimate obtains a high weighting by means of a correspondingly high weighting factor ω _p ; accordingly receives the dynamic estimation a low weighting by means of a correspondingly small weighting factor ω _h . With the aging process of the rechargeable electrochemical energy storage device being able to be expressed by the state of health (SoH), the static estimation weighting loses value and the dynamic weighting value is increased, as indicated by the corresponding change in the weighting factors ω _p and ω _h is expressed. This mechanism achieves great reliability in estimating the time required to charge the rechargeable electrochemical energy storage device throughout the life of the rechargeable electrochemical energy storage device.

• θ_p = statische Ladezeitdauer
• θ_h = dynamische Ladezeitdauer
• ω_p und ω_h = Gewichtungsfaktoren; ω_p + ω_h = 1

By way of example, this can be expressed in a formula as follows: $$\text{estimated charging time}={\theta }_p{\omega }_p+{\theta }_H{\omega }_H$$

• θ _p = static charging time
• θ _h = dynamic charging time
• ω _p and ω _h = weighting factors; ω _p + ω _h = 1

Start life (SoH = 1): ω _p = 0.9 (preferably 0.7); ω _h = 0.1 (preferably 0.3) end life (SoH = eg 0.8) ω _p = eg 0.5; ω _h = eg 0.5

3 shows purely by way of example and not to scale an electronic control device (ECU) 1 according to the present invention, which may include the Battery Management System (BMS) and / or the Energy Management Unit (ENM). The electronic control device (ECU) 1 has at least one interface 2 to the so-called "Electrical Energy Management High Voltage System" (EEMH _Plgin-state ) as well as interfaces 3 . 4 for reading in the measured and / or calculated state of charge (SoC) as well as for reading in the current value of the electric current supplied to the rechargeable, electrochemical energy storage device (P-HVB = power-high voltage battery-actual current value). In addition, the control device (ECU) 1 at least one interface 5 for outputting the estimated charging period (charging period [hrs.]) to an on-vehicle or in-vehicle device.

Diagnostic services can be performed by way of example with the following command sequence: read_curve_parameters
Schreibe_Kurven_Parameter
Reset_Curve_History
Lese_Gewichtungen
Schreibe_Gewichtungen
Lese_Abschätzungen

LIST OF REFERENCE NUMBERS

1

electronic control device (ECU)

2

interface

3

interface

4

interface

5

interface

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 2725685 A1 [0011]

Claims (8)

Method for estimating the time duration required for a full charge of a rechargeable, electrochemical energy storage device of a motor vehicle which can be driven by an electric motor using an external electric vehicle charging device, by means of an electronic control device configured for this purpose, comprising the steps of: a) determining the state of charge of rechargeable, electrochemical energy storage device at the beginning of a charging process; b) determining the charging power of the vehicle-external charging device at the beginning of the charging process, c) determining the time period (θ _p ) resulting from a) and b) for a full charge of the rechargeable electrochemical energy storage device using in a first electronic data storage device for various charging powers stored, measured or calculated charging profiles of the rechargeable, electrochemical energy storage device when new; d) determining the period of time (θ _h ) resulting from a) and b) for a full charge of the rechargeable electrochemical energy storage device using at least the newest measured charging profile of the rechargeable stored in the first or a different second electronic data storage device , electrochemical energy storage device; and e) estimating by the control means of the necessary period of time for a full charge of the rechargeable electrochemical energy storage device by forming the sum of the (with a weighting factor ω _p) multiplied by time duration (θ _p) in accordance with c) and the (with a weighting factor ω _h) multiplied time (θ _h ) according to d), wherein the sum of the two weighting factors (ω _p ; ω _h ) is 1, the value of the weighting factor (ω _p ) for the period (θ _p ) according to c) with increasing aging of the rechargeable electrochemical energy storage device is smaller than the value of this weighting factor (ω _p ) in the new state of the rechargeable electrochemical energy storage device is selected, and the value of the weighting factor (ω _h ) for the period (θ _h ) according to d) with increasing aging of the rechargeable electrochemical energy storage device greater than that Value of this weighting factor (ω _h ) in the new state d the rechargeable, electrochemical energy storage device is selected. Method according to Claim 1 where a) is a value of 0.9, preferably 0.7 for the weighting factor (ω _p ) of the time duration (θ _p ) according to c) of Claim 1 for the rechargeable, electrochemical energy storage device is selected to be new, and the value of that weighting factor (ω _p ) is lowered to 0.5 until the end of the useful life of the rechargeable electrochemical energy storage device is reached, and b) a value of 0.1, preferably 0.3 for the weighting factor (ω _h ) of the time duration (θ _h ) according to d) of Claim 1 for the rechargeable, electrochemical energy storage device in the new state is selected, and the value of this weighting factor (ω _h ) is raised to 0.5 until reaching the end of the useful life of the rechargeable electrochemical energy storage device. Method according to Claim 1 or 2 , wherein for determining the time duration (θ _h ) for a full charge of the rechargeable, electrochemical energy storage device according to d) of Claim 1 a plurality of the last charging profiles of the rechargeable electrochemical energy storage device stored in the first or a different second electronic data storage device is used, wherein of the plurality of charging profiles an average value for the time duration (θ _h ) according to d) of Claim 1 calculated or estimated. Method according to one of the preceding claims, wherein for determining the time duration (θ _p ) according to c) of Claim 1 Charge profiles stored in the first electronic data storage device are used in which measured values were acquired, calculated or estimated at fixed time intervals. Method according to one of the preceding claims, wherein a FIFO data storage device is used as the second electronic data storage device and when the storage limit of the FIFO data storage device is reached, the oldest charging profile is replaced by the most recent charging profile. Method according to one of the preceding claims, wherein after estimating the required period of time for a full charge of the rechargeable, electrochemical energy storage device, the estimated time period is output by the control device to a vehicle-side and / or vehicle-external device. Electronic control device, characterized in that the electronic control device for carrying out one of the methods according to one of Claims 1 to 6 is set up. At least also motor driven motor vehicle with a traction battery, thereby characterized in that it is an electronic control device according to Claim 7 having.

Images