DE102020205061A1 - Method for assisting a driver of an electrically drivable vehicle - Google Patents

Abstract

Method for supporting a driver of an electrically drivable vehicle comprising at least one electrochemical energy store and / or electrochemical converter with the following steps:
a. Continuous recording of at least one environmental variable, an operating variable and / or a driving dynamic variable;
b. Wireless transmission of the detected environmental variable, the operating variable and / or the dynamic driving variable to a control unit that is spatially separated from the vehicle;
c. Comparing the environment variable with at least one target environment variable, the operating variable with a target operating variable and / or the driving dynamic variable with a driving dynamic desired variable;
d. Determining a recommendation size based on a result of the comparison;

Description

The invention is based on a method for supporting a driver of an electrically drivable vehicle comprising at least one electrochemical energy store and / or electrochemical converter, a device for supporting a driver of an electrically drivable vehicle, a computer program and a use according to the preamble of the independent claims.

State of the art

In electrically powered vehicles, traction batteries, fuel cells and e-axles are valuable components of the drive train. Careful operation of these components while driving and the traction battery during charging is of great importance to a vehicle owner, especially when it comes to future repair costs.

So far, drivers of electrically powered vehicles have only received information about the charge status of the traction battery or energy flows within the vehicle or error messages, but no information about how the traction battery or other valuable components of the vehicle can be operated gently, so that a long service life is ensured.

From the document DE 10 2018 131 626 A1 a method for predicting battery life is known.

From the document US 2005/0125117 A1 an information management and monitoring system for a vehicle is known.

It is the object of the present invention to further improve the state of the art. This object is achieved by the features of the independent claims.

Disclosure of the invention

Advantages of the invention

1. a. Fortlaufendes Erfassen mindestens einer Umgebungsgröße, einer Betriebsgröße und/oder einer fahrdynamischen Größe;
2. b. Kabelloses Übermitteln der erfassten Umgebungsgröße, der Betriebsgröße und/oder der fahrdynamischen Größe und/oder der ermittelten Empfehlungsgröße an die vom Fahrzeug räumlich getrennte Steuereinheit;
3. c. Vergleichen der Umgebungsgröße mit mindestens einer Soll-Umgebungsgröße, der Betriebsgröße mit einer Soll-Betriebsgröße und/oder der fahrdynamischen Größe mit einer fahrdynamischen Soll-Größe;
4. d. Ermitteln einer Empfehlungsgröße basierend auf einem Ergebnis des Vergleichs;

The procedure according to the invention with the characterizing features of the independent claims has the advantage that the method for assisting a driver of an electrically drivable vehicle has the following steps:

1. a. Continuous recording of at least one environmental variable, an operating variable and / or a driving dynamic variable;
2. b. Wireless transmission of the detected environmental variable, the operating variable and / or the dynamic driving variable and / or the determined recommendation variable to the control unit spatially separated from the vehicle;
3. c. Comparing the environment variable with at least one target environment variable, the operating variable with a target operating variable and / or the driving dynamic variable with a driving dynamic desired variable;
4. d. Determining a recommendation size based on a result of the comparison;

On the basis of these variables, driving behavior, load behavior or usage behavior can advantageously be taken into account, taking into account certain predetermined learning values, such as, for example, a state of charge of an electrochemical energy store and / or energy consumption.

The variables are advantageously compared with an optimal driving behavior by means of an algorithm and / or models and deviations therefrom are identified.

This makes it possible to determine recommendations for the driver of the electrically drivable vehicle, for example for a driving and / or charging strategy that is gentle on components.

The vehicle owner and / or vehicle manufacturer also has, for example, access to field data, user behavior, driving behavior, feedback on the acceptance of resource-saving operating strategies and / or information on components of the vehicle in special driving situations.

Using this data, previously unknown stress factors and incorrect behavior of vehicle components in special driving situations can be identified and their design and dimensioning checked in daily use. Furthermore, this data can advantageously be used for a predictive diagnosis of vehicle components.

Further advantageous embodiments are the subject of the subclaims.

• e. Empfangen der Empfehlungsgröße von einer vom Fahrzeug räumlich getrennten Steuereinheit;

The method according to the invention for supporting a driver of an electrically drivable vehicle further comprises the following step:

• e. Receiving the recommendation variable from a control unit spatially separated from the vehicle;

As a result, additional environmental variables can be taken into account by a control unit that is spatially separated from the vehicle, for example data from a predictive diagnosis of vehicle components.

• f. Erzeugen von optischen, elektrischen, akustischen und/oder haptischen Signalen in Abhängigkeit der Empfehlungsgröße;

The method according to the invention for supporting a driver of an electrically drivable vehicle further comprises the following step:

• f. generation of optical, electrical, acoustic and / or haptic signals depending on the recommendation size;

As a result, the driver of the electrically drivable vehicle can be trained to operate the electrically drivable vehicle in a way that conserves components, extends battery life and / or is efficient.

The driver of the electrically powered vehicle can also benefit from additive aging of components and increased consumption due to their personal driving behavior and charging behavior, for example due to overuse of components, temporary high loads, frequent rapid charging and / or charging at high ambient temperatures, or reduced consumption be informed of their predictive driving style with lower energy consumption, fewer charging cycles and less aging, and further recommendations for gentle operation are made available.

A resource-saving, optimized operating strategy can also be recommended to the driver. If the driver accepts the recommended operating strategy, he or she receives recommendations for achieving the operating strategy during the driving cycle or, in the case of partially or fully autonomous vehicles, the optimized operating strategy is implemented, for example by reducing a maximum acceleration.

The recommendation variable advantageously represents at least one recommended braking point, a recommended acceleration, a recommended ideal line, an indication of improving a driving style, an indication of the functionality of vehicle components and / or a comparison result with at least one other vehicle.

As a result, the driver of the electrically drivable vehicle can be trained in his driving style, in particular on stress factors and wear and tear of vehicle components, when cornering and / or in traffic jams. Furthermore, the driver can compare his driving style with at least one other vehicle, for example a daily, weekly and / or monthly fleet average and / or a ranking list. A technically experienced driver can use information on the functionality of a vehicle component to derive suggestions for improving his driving behavior.

The environmental variable advantageously represents an ambient temperature of the electrically drivable vehicle, a period of time, a traffic flow, a state of charge (SOC), an aging state (SOH) and / or a performance (SOF) of the electrochemical energy store.

In this way, influencing factors can be determined which are decisive for the aging behavior and / or the efficient operation of the electrochemical energy store and ultimately an operating strategy can be defined in order to extend the remaining service life.

The operating variable advantageously represents an electrical voltage, an electrical current, a temperature and / or an impedance of the electrochemical energy store and / or of vehicle components.

The driving dynamics variable advantageously represents a speed, an acceleration, a geographical position, an inclination and / or a vehicle state of the electrically drivable vehicle.

This allows the operating strategy to be adapted to the driver, the vehicle owner and geographical conditions.

Furthermore, a device according to the invention for supporting a driver of an electrically drivable vehicle comprises at least one electrochemical energy store, at least one sensor for detecting environmental variables, operating variables and / or driving dynamics variables of the vehicle and / or the electrochemical energy store and at least one means, in particular an electronic control unit and / or a control unit which is set up to carry out the steps of the method according to the invention.

The invention advantageously comprises a computer program comprising commands which cause the device according to the invention to carry out the method steps according to the invention, as well as a machine-readable storage medium on which the computer program is stored.

Use of the method according to the invention for electric vehicles, fuel cell vehicles, hybrid vehicles, plug-in hybrid vehicles, aircraft, pedelecs or e-bikes, for electric hand tools or kitchen machines, as well as in stationary storage devices for storing, in particular, regeneratively generated electrical energy.

Figure list

Embodiments of the invention are shown in the drawing and explained in more detail in the description below.

• 1 eine schematische Darstellung einer Ausführungsform einer erfindungsgemäßen Vorrichtung; und
• 2 ein Ablaufdiagramm einer Ausführungsform eines erfindungsgemäßen Verfahrens.

Show it:

• 1 a schematic representation of an embodiment of a device according to the invention; and
• 2 a flow chart of an embodiment of a method according to the invention.

Detailed description of the exemplary embodiments

The same reference symbols denote the same device components in all figures.

1 shows a schematic representation of an embodiment of a device according to the invention 100 with a vehicle 101 , comprising an electrochemical energy store 102 , for example a traction battery, at least one sensor 103 for recording environmental parameters, operating parameters and / or driving dynamics parameters of the vehicle 101 , other components 104 of the vehicle and an electronic control unit 105 .

In one from the vehicle 101 spatially separated control unit 110 , for example in an IT infrastructure (cloud computing) available via the Internet, includes data from an electrochemical model of the electrochemical energy store 102 , the vehicle components 104 and / or data for the component-saving, battery life-extending and / or efficient operation of the electrically drivable vehicle 101 filed. These data are, for example, maps and / or models that are dependent on temperature, current, state of charge and other physical variables.

The electronic control unit 105 communicates wirelessly, for example by means of a radio link 120 , with one from the vehicle 101 spatially separated communication device 111 the control unit 110 .

On the basis of further data 112 , for example fleet data, an operating strategy is optimized almost in real time 113 and recommendation sizes 114 determined that wirelessly, for example by means of a radio link 130 to the vehicle 105 and / or a portable device for telecommunications 107 , for example a smartphone, a driver 106 of the vehicle 101 can be transmitted.

2 shows a flow chart of an embodiment of a method according to the invention 200 . In step 201 becomes the procedure 200 started, for example, when the driver 106 of the vehicle 101 the method by means of the portable device for telecommunications 107 starts.

In step 202 at least one environmental variable, an operating variable and / or a dynamic driving variable is continuously recorded.

In step 203 the detected environmental variable, the operating variable and / or the dynamic driving variable is adapted to that of the vehicle 101 spatially separated control unit 110 transmitted wirelessly.

In step 204 the environment variable is compared with at least one target environment variable, the operating variable with a target operating variable and / or the driving dynamic variable with a driving dynamic desired variable.

In step 205 a recommendation size is determined based on a result of the comparison.

In step 206 the recommendation size will be different from that of the vehicle 101 spatially separated control unit 110 receive and generate optical, electrical, acoustic and / or haptic signals depending on the recommendation size.

The procedure is in step 206 finishes, for example, when the driver 106 of the vehicle 101 the method by means of the portable device for telecommunications 107 terminated and / or the vehicle 101 or the procedure in step 202 continued.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was 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.

Patent literature cited

• DE 102018131626 A1 [0004]
• US 2005/0125117 A1 [0005]

Claims (11)

Method for supporting a driver (106) of an electrically drivable vehicle (101) comprising at least one electrochemical energy store (102) and / or electrochemical converter with the following steps: a. (202) Continuous recording of at least one environmental variable, an operating variable and / or a driving dynamic variable; b. (203) Wireless transmission of the detected environmental variable, the operating variable and / or the dynamic driving variable to a control unit (110) spatially separated from the vehicle (101); c. (204) comparing the environment variable with at least one target environment variable, the operating variable with a target operating variable and / or the driving dynamic variable with a driving dynamic desired variable; d. (205) determining a recommendation size based on a result of the comparison; Method for supporting a driver (106) of an electrically drivable vehicle (101) according to Claim 1 , further comprising the following step: e. Receiving the recommendation variable from the control unit (110) spatially separated from the vehicle (101); Method for supporting a driver (106) of an electrically drivable vehicle (101) according to one of the preceding claims, further comprising the following step: f. (206) generating optical, electrical, acoustic and / or haptic signals as a function of the recommendation size; The method for supporting a driver (106) of an electrically drivable vehicle (101) according to one of the preceding claims, wherein the recommendation variable includes at least one recommended braking point, a recommended acceleration, a recommended ideal line, an indication of improving a driving style, an indication of an operation of Vehicle components (104) and / or a comparison result for at least one further vehicle is represented. Method for supporting a driver (106) of an electrically drivable vehicle (101) according to one of the preceding claims, wherein the environmental variable is an ambient temperature of the electrically drivable vehicle (101), a time duration, a traffic flow, a state of charge (SOC), an aging state (SOH ) and / or a performance (SOF) of the electrochemical energy store (102). Method for supporting a driver (106) of an electrically drivable vehicle (101) according to one of the preceding claims, wherein the operating variable is an electrical voltage, an electrical current, a temperature and / or an impedance of the electrochemical energy store (102) and / or of vehicle components (104) represents. Method for supporting a driver (106) of an electrically drivable vehicle (101) according to one of the preceding claims, wherein the driving dynamic variable represents a speed, an acceleration, a geographical position, an inclination and / or a vehicle state of the electrically drivable vehicle (101) . Device (100) for supporting a driver (106) of an electrically drivable vehicle (101), comprising at least one electrochemical energy store (102) and / or an electrochemical converter, at least one sensor (103) for detecting environmental variables, operating variables and / or driving dynamics Sizes of the vehicle (101), the electrochemical energy store (102) and / or the vehicle components (104) as well as at least one means (105, 110), in particular an electronic control device and / or a control unit, which are set up according to the steps of the method one of the Claims 1 until 7th perform. Computer program comprising instructions that cause the device to follow Claim 8 the process steps according to one of the Claims 1 until 7th executes. Machine-readable storage medium on which the computer program is based Claim 9 is stored. Use of a method according to one of the Claims 1 until 7th for electric vehicles, fuel cell vehicles, hybrid vehicles, plug-in hybrid vehicles, aircraft, pedelecs or e-bikes, for electric hand tools or kitchen machines, as well as in stationary storage units for storing electricity generated from renewable sources in particular.

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