DE102020100555A1 - Weather-optimized range calculation for e-vehicles - Google Patents

Abstract

Range management system (10) for determining a range of an electric vehicle (11) with at least one battery, at least one convenience consumer, at least one safety-relevant function, at least one server (2) and at least one vehicle-internal sensor system (13), the range management system (10) being set up to access the server and / or the at least one sensor system of the electric vehicle, wherein the range management system (10) is set up to obtain data from the server and / or from the at least one sensor and, in the case of route guidance (14a, 14b, 14c) of the electric vehicle (11) based on the related data to determine a route profile for a route of the route guidance (14a, 14b, 14c).
The present invention also relates to a method for determining a range of an electric vehicle (11) using a range management system (10) described above.

Description

The present invention relates to a range management system for determining a range of an electric vehicle with at least one battery and at least one air conditioning device and at least one server.

Internal vehicle influences and navigation information are currently used to calculate the state of charge (SOC) and the range of an electric vehicle.

For example, from the DE 10 2014 200 450 A1 an energy management method and an energy management system for an electric vehicle are known. The energy management system has a computing unit which takes a weather forecast into account when calculating a remaining range of the electric vehicle, with an energy consumption of an air conditioning system of the electric vehicle being converted into a reduced remaining range.

From the DE 10 2014 205 252 A1 a method for controlling a hybrid drive of a vehicle, as well as a vehicle-mounted device and a central computer are known. The method is used to estimate additional energy consumption by an air conditioning system as a function of the temperatures prevailing on a route ahead.

From the DE 10 2018 113 873 A1 a vehicle range prediction with wind and solar compensation is known. A vehicle range prediction module is used to predict a vehicle range taking solar energy data into account.

Energy management methods and systems are therefore known in the prior art, which primarily take into account internal vehicle influences or navigation information.

For the air conditioning of electric vehicles, however, a considerable proportion of the battery capacity is used up depending on external influences, which has a strong influence on the range of an electric vehicle.

It is therefore the object of the present invention to provide a range management system and a method for determining a range that also takes into account external influences when calculating the power consumption of a battery and the range of an electric vehicle.

This object is achieved by a range management system for an electric vehicle with the features of claim 1, as well as by a method for determining a range of an electric vehicle with the features of claim 6. Advantageous developments and designs are the subject of the description and description of the figures.

The present invention relates to a range management system for determining a range of an electric vehicle with at least one battery, at least one convenience consumer, at least one safety-relevant function, at least one server and at least one vehicle-internal sensor system.

According to the invention, the range management system is set up to access the server and / or the at least one sensor system, the range management system being set up to obtain data from the server and / or from the at least one sensor system and, when the electric vehicle is guided, based on the obtained data to determine a route profile for a route of the route guidance. The at least one sensor system is optionally formed on an outer surface of the vehicle or on an inner surface of the vehicle.

The range management system is thus set up to obtain further data from the server and to include this data in the range calculation of the electric vehicle as well as the values recorded by the vehicle sensor system. Further data can be topography data, sun position profiles or shading profiles, traffic data, direct sunlight data or road surface information.

The sensor system can be set up to detect the temperature of power electronics, a high-voltage battery, an electric machine and / or a transmission. Optionally, the sensor system is set up to record weather information. For example, weather information can be an outside temperature, solar radiation, precipitation, snow or wind.

The route guidance of the electric vehicle can be set up or usable in an active or passive manner. The range management system is thus set up to determine a range either for active route guidance and / or passive route guidance.

In one embodiment, the range management system is set up to receive weather data from the server, the weather data being current and forecast weather data and the range management system being set up when the route guidance is activated Electric vehicle to determine a route profile for a route of the route guidance based on the weather data, wherein the route profile is designed as a climate profile.

As a rule, the range management system is set up to determine the climate profile with the help of a calculation or control logarithm. As a rule, the range management system is also set up to include the additional data obtained or recorded from the server or from the at least one sensor system in the determination of the climate profile. The range management system offers the advantage that a range forecast is much more accurate, which increases customer benefit. In addition to the range forecast, the climate control can also be used predictively in an energy-efficient manner.

The range management system is also optionally set up to present a vehicle occupant with a proposal for the air conditioning or the control of the air conditioning device in the case of a fixed range requirement. For example, the range management system can be set up to issue a proposal that a range of 200 km can be achieved with an interior temperature of 21 ° C or a range of 220 km can be achieved with an interior temperature of 24 ° C.

In one refinement, the range management system is set up to determine a prognosis of the expected power consumption of the battery by air conditioning by the air conditioning device based on the route profile or climate profile created. Typically, the range management system is set up to detect a state of charge of the battery. Based on the state of charge and the created route profile or climate profile, the range management system is set up to output a forecast of the expected power consumption of the electric vehicle with different levels of use of the climate device for the selected route guidance.

In a further development, the range management system is set up to determine a forecast of an expected range of the electric vehicle based on the created route profile or climate profile. The range management system is set up to determine a power consumption of the battery based on the related weather data and the route of the route guidance based on the weather and / or altitude data and / or traffic data. This offers the advantage that the range management system is set up to create a range specifically for a route taking into account the current and forecast weather data and based on other external factors such as solar radiation or altitude profile.

In a further development, the range management system is set up to include the power consumption of the at least one safety-relevant function and / or of the at least one comfort consumer recorded by the at least one vehicle-internal sensor system in determining the expected power consumption of the battery and the expected range of the electric vehicle. This offers the advantage that online live weather data can be linked to the vehicle-internal sensor system and the calculation or control algorithm can be adapted accordingly. The in-vehicle sensor system is thus set up to include temperature control of power electronics, a high-voltage battery, an electric motor and / or a transmission in the calculation of the expected power consumption or the expected range, taking into account the route profile or climate profile.

As a rule, the range management system is set up to access vehicle systems, in particular safety-relevant functions, drive and / or convenience consumers, and to set at least one vehicle system based on the determination of the expected power consumption of the battery and the expected range of the electric vehicle. In particular, the range management system is set up to set at least one safety-relevant function, the drive and / or at least one comfort consumer, in such a way that the expected power consumption of the battery is optimized and the range of the electric vehicle is extended without a vehicle occupant's perception of comfort being impaired. A safety-relevant function is optionally a cooling or temperature control of power electronics, a high-voltage battery, an electric machine, a transmission.

In a further development, the range management system is set up to determine and set an optimized comfort consumption, the range management system being set up to reduce the at least one comfort consumer or the at least one safety-relevant function weighted in relation to a further comfort consumer or a further safety-relevant function in order to achieve a desired To achieve the target range of the electric vehicle. A comfort consumption is a consumption at which a range of the electric vehicle can be increased, while at least one comfort consumer is reduced in its performance without noticeably influencing the comfort of the vehicle occupants.

The present invention also relates to a method for determining a range of an electric vehicle using a range management system described above with at least one battery, an air conditioning device, a server and a sensor system.

According to the invention, data is obtained from the server and / or the sensor system in a first step. The data was, for example, weather data, in particular current and forecast weather data for a route specified by route guidance. Alternatively, the range management system obtains topography data, sun position profiles or shading profiles, traffic data, direct sunlight data or road surface information from the server. The range management system optionally uses the sensors to control the temperature of power electronics, a high-voltage battery, an electric motor and / or a transmission. Alternatively, the range management system obtains weather information from the sensors.

For example, weather information can be an outside temperature, solar radiation, precipitation, snow or wind.

In a further step, a route profile, in particular a climate profile, of a route during route guidance is created based on the data obtained from the server and / or the sensor system. Optionally, the sun position profiles or shading profiles, height profiles and / or traffic data obtained from the server are included in the calculation of the climate profile.

In a further step, a state of charge of the battery is determined. As a rule, the range management system includes at least one vehicle-internal sensor that detects the current state of charge of the battery.

In a further step, a prognosis of the expected power consumption for a comfort consumer and / or at least one safety-relevant function is created based on the determined state of charge and the created route profile or climate profile. A prognosis of the power consumption to be expected can be determined with different levels of use of the comfort consumers.

In a further development of the method, a prognosis of an expected range of the electric vehicle is determined based on the created route profile or climate profile. The range management system determines a power consumption of the battery, for example based on the weather data and / or altitude data and / or traffic data obtained from the server and the route of the route guidance. The range management system optionally creates the forecast taking into account the data or values recorded by the sensors. This offers the advantage that a range can be determined, for example, taking into account the current and forecast weather data and based on other external factors such as solar radiation or altitude profile.

In a further development of the method, when preparing the forecast of the expected power consumption, the forecast of an increasingly necessary all-wheel drive use based on a correspondingly determined climate profile is also taken into account. In particular with a pronounced elevation profile, the use of all-wheel drive or the all-wheel drive mode can have a greater impact on the power consumption of the battery.

In a further development, the power consumption of at least one comfort consumer and / or at least one safety-relevant function is taken into account when creating the forecast of the expected power consumption. A safety-relevant function is a driver assistance system (ADAS), an electric driving noise (AVAS), an active chassis or an all-wheel drive on demand, i.e. H. on demand. Comfort consumers include the air conditioning system, seat heating, ventilation and rear window heating. The list of convenience consumers is not exhaustive and can include other vehicle systems.

In a further development, a prognosis of an optimized comfort consumption is created, with the respective comfort consumers being weighted and reduced when creating the prognosis in order to obtain the desired target range. For example, an air conditioning device can be reduced by 60% of its air conditioning performance. Optionally, a first comfort consumer and at least one further comfort consumer are weightedly reduced. Optionally, at least one convenience consumer and at least one safety-relevant function can be reduced in a weighted manner. For example, an air conditioning device is reduced by 60% of its original air conditioning output and in an all-wheel drive mode the all-wheel drive output is reduced by 20%. The weighting or reduction of the respective performance of the respective comfort consumer and / or the respective safety-relevant function can be varied and allows a predetermined or desired target range to be achieved or maintained.

• 1 eine schematische Darstellung einer Ausführungsform eines erfindungsgemäßen Reichweitenmanagementsystems,
• 2 eine schematische Darstellung einer bespielhaften Ermittlung des Reichweitenmanagementsystems.

The invention is shown schematically on the basis of embodiments in the drawing and is further developed with reference to the drawing described, wherein the same components are identified with the same reference numerals. It shows:

• 1 a schematic representation of an embodiment of a range management system according to the invention,
• 2 a schematic representation of an exemplary determination of the range management system.

1 shows a schematic representation of an embodiment of a range management system according to the invention 10 . The range management system 10 is used to determine the range of an electric vehicle 11 set up. The range management system 10 comprises for this purpose at least one battery (not shown) and at least one air conditioning device (not shown) and at least one server 12th .

The range management system 10 is set up, a prognosis or optimization of a range of the electric vehicle 11 to determine and if necessary based on the prognosis in a corresponding control of various vehicle systems 15th , especially in comfort consumers or in the drive of the electric vehicle 11 to intervene. This is the range management system 10 usually authorized to access and set the vehicle infrastructure, in particular the convenience consumers, such as the air conditioning device or the all-wheel drive mode. Alternatively, the range management system is set up to access safety-relevant functions or the drive.

The range management system is used to determine the range 10 set up by the vehicle's internal sensors 13th recorded power consumption of various vehicle systems 15th to be recorded and included in the calculation. There is at least one in-vehicle sensor system 13th set up to detect a battery charge level, and optionally to detect the power consumption of the headlights, for example high-performance LEDs.

In addition, there is at least one in-vehicle sensor system 13th set up to record a power consumption of at least one comfort consumer, for example an air conditioning device, seat heating, ventilation or rear window heating. The list of convenience consumers is not exhaustive. The at least one in-vehicle sensor system 13th can also be set up to record the power consumption of other convenience consumers.

The at least one in-vehicle sensor system 13th can also be set up to record a current engine output or an active or passive all-wheel drive mode. The sensors 13th can also be set up to detect temperature control of power electronics, a high-voltage battery, an electric machine and / or a transmission. Optionally, the sensor system is set up to record weather information. For example, weather information can be an outside temperature, solar radiation, precipitation, snow or wind.

The range management system 10 is also set up to include internal navigation data in the calculation of the range of the electric vehicle 11 to be included.

Furthermore, there is the range management system 10 set up on the server 12th to access. Usually the range management system 10 set up by the server 12th To obtain weather data. The weather data is usually current and forecast weather data.

The range management system relates to 10 usually only the weather data that prevail on a programmed route or on the route of an activated route guidance (not shown). The road conditions can also be called up from the server.

The range management system 10 Obtain additional data, in particular a profile of the position of the sun or a shading profile based on clouds and a height profile, if this is not already provided by the internal navigation system, for an activated route guidance. The range management system can also 10 Topography data, sun position profiles or shading profiles, traffic data, direct sunlight data or road surface information from the server 12th Respectively.

A sun position profile is particularly useful if, for example, the route guidance leads along an avenue of trees. In summer, for example, this can significantly reduce the air conditioning required compared to driving in full sun. Conversely, it can make sense to use the thermal gain from glazing, for example in autumn.

2 shows an exemplary determination of the range management system 10 .

The range management system 10 is set up in the present embodiment on the server 12th access and weather data from the server 12th to receive, the weather data being current and forecast weather data.

The range management system 10 is set up in particular when route guidance is activated 14a , 14b , 14c of the electric vehicle 11 Based on the weather data, a climate profile for the route of the route guidance 14a , 14b , 14c to determine. This is the range management system 10 set up to determine a forecast of the expected power consumption for the air conditioning by the air conditioning device based on the state of charge detected or determined by the vehicle-internal sensors and the created climate profile.

In the 2 is an exemplary determination of the range management system 10 shown. A route initially determined as the desired route by the activated route guidance is blocked. The range management system 10 is set up to suggest at least one alternative route.

In the present embodiment, the range management system 10 two alternative routes suggested. There is a first alternative route guidance 14b a shorter route and a second alternative route guidance 14c is a longer route.

The first alternative route guidance 14b Although it is a shorter route, it has more vertical meters, with poorer weather conditions, for example snow, prevailing due to the vertical meters. Because of the altitude difference, the temperature is lower, which means that the air conditioning device needs a higher air conditioning performance in order to provide vehicle occupants with pleasant comfort. In addition, due to the altitude and the weather, the all-wheel drive mode is activated, which requires a higher drive power. The range management system 10 is set up, based on the aforementioned data, a forecast of the power consumption of the battery of the electric vehicle 11 for the first alternative route guidance.

The second alternative route guidance 14c is a longer route, but has no or hardly any vertical meters. The weather in the present version is sunny and the temperatures are neutral, so that hardly any air conditioning is required. Due to the altitude difference and the weather, the all-wheel drive mode is only partially active, in this case only on 10% of the route of the alternative route guidance, which means that only marginal additional drive power is required. The range management system 10 is set up, based on the aforementioned data, a forecast of the power consumption of the battery of the electric vehicle 11 for the second alternative route guidance 14c to determine.

The range management system 10 is set up to determine a power consumption on the alternative route guidance when determining an alternative route guidance and to compare it with one another. Usually the range management system 10 set up to propose the alternative route guidance that results in lower power consumption.

List of reference symbols

10

Range management system

11

Electric vehicle

12th

server

13th

in-vehicle sensors

14a, 14b, 14c

Route guidance

15th

Vehicle systems, in particular safety-related functions, convenience consumers

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 102014200450 A1 [0003]
• DE 102014205252 A1 [0004]
• DE 102018113873 A1 [0005]

Claims (10)

Range management system (10) for determining a range of an electric vehicle (11) with at least one battery, at least one convenience consumer, at least one safety-relevant function, at least one server (2) and at least one vehicle-internal sensor system (13), characterized in that the range management system (10 ) is set up to access the server and / or the at least one sensor system of the electric vehicle, the range management system (10) being set up to obtain data from the server and / or from the at least one sensor system and, in the case of route guidance (14a, 14b , 14c) of the electric vehicle (11) to determine a route profile for a route of the route guidance (14a, 14b, 14c) based on the related data. Range management system (10) according to Claim 1 , characterized in that the range management system is set up to receive weather data from the server (12), the weather data being current and forecast weather data, and the range management system (10 being set up with an activated route guidance (14a, 14b, 14c) of the electric vehicle (11) to determine a route profile for a route of the route guidance (14a, 14b, 14c) based on the weather data, the route profile being designed as a climate profile. Range management system (10) according to Claim 1 or 2 , characterized in that the range management system (10) is set up to determine a forecast of an expected power consumption of the battery by a comfort consumer based on the created route profile or climate profile. Range management system (10) according to one of the Claims 2 or 3 , characterized in that the range management system (10) is set up to determine a forecast of an expected range of the electric vehicle (11) based on the created route profile or climate profile. Range management system (10) according to Claim 1 , characterized in that the range management system (10) is set up to convert the power consumption of the at least one safety-relevant function and / or of the at least one comfort consumer detected by the at least one vehicle-internal sensor system (13) into a determination of an expected power consumption of the battery and an expected Include the range of the electric vehicle (11). Range management system (10) according to one of the preceding claims, characterized in that the range management system (10) is set up to determine and set an optimized comfort consumption, the range management system (10) being set up to include the at least one convenience consumer or the at least one safety-relevant function Weighted reduction in relation to another comfort consumer or another safety-relevant function in order to achieve a desired target range of the electric vehicle (11). Method for determining a range of an electric vehicle (11) by a range management system (10) according to one of the Claims 1 to 6th with at least one battery, an air conditioning device, a server (12) and a sensor system (13), comprising the steps of: a) obtaining data from the server (12) and / or the sensors of the electric vehicle (11), b) creating a Route profile, in particular a climatic profile of a route during a route guidance (14a, 14b, 14c) based on the data obtained from the server (12) and / or the sensor system (13), c) determining a state of charge of the battery, d) creating a prognosis the expected power consumption for at least one comfort consumer and / or a safety-relevant function based on the determined state of charge and the route profile or climate profile created. Procedure according to Claim 7 , a forecast of an expected range of the electric vehicle (11) being determined based on the created route profile or climate profile. Procedure according to Claim 7 or 8th , whereby the forecast of an increasingly necessary all-wheel drive use based on a correspondingly determined climate profile is also taken into account when creating the forecast of the expected power consumption. Method according to one of the Claims 7 to 9 , wherein an optimized comfort consumption is determined, in which the respective comfort consumers are weighted reduced in order to obtain a desired target range.

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