DE102022209049A1 - Vehicle system for operating a vehicle - Google Patents

Abstract

The invention relates to a vehicle system (1) for operating a vehicle (10) with an on-board energy network (7), the vehicle system (1) comprising an energy storage device, the vehicle system (1) having currently set vehicle parameters and several additional consumers connected to the energy network (7). with set consumer parameters, and at least one first main consumer connected via a DC/AC converter (6,6a) with main consumer parameters, a prediction unit (11) being provided for estimating an occurring traffic situation at a specific future point in time and for determining or estimating a increased power consumption of the vehicle system (1) in the estimated traffic situations occurring at specific future points in time, the vehicle system (1) for preconditioning at least one preconditionable auxiliary consumer (12) taking into account the currently set consumer parameter of the auxiliary consumer (12) and with regard to the specific future points in time with increased power consumption and wherein the vehicle system (1) is designed to temporarily switch off the at least one preconditioned auxiliary consumer (12) at a respective future specific point in time with increased power demand in such a way that a current peak can be avoided or at least reduced.

Description

The invention relates to a vehicle system for operating a vehicle with an on-board energy network, the vehicle system comprising an energy storage device which is designed to receive, store and deliver electrical energy to the on-board energy network, the vehicle system having currently set vehicle parameters as well as several to the Additional consumers connected to the energy network with set consumer parameters, as well as at least one first main consumer connected via a DC/AC converter with main consumer parameters.

Motor vehicles have an ever-increasing number of electrical consumers. This applies both to motor vehicles with internal combustion engines and to motor vehicles that are moved by electric drive machines, so-called electric vehicles or electric vehicles, and also to hybrid vehicles.

Modern motor vehicles also usually have a large number of different systems, which must be supplied with electrical energy depending on their function and their current operating status. Among other things, the electrical energy in such an electric vehicle is transferred to various auxiliary consumers and the drive train, e.g. with one or more electric motors and planetary gears, which drives the drive wheels. The increasing number of consumer systems in vehicles represents a particular challenge for energy supply in terms of range capability and reliability. A particular challenge for this is efficient energy management.

The DE 10 2010 029971 A1 discloses a device and a method for optimal use of the energy of a motor vehicle driven by an electric machine, in which the electric machine is powered by at least one energy source, with the energy stored in the energy source being used to drive to a predetermined destination, the energy stored in the energy source contained energy is determined and the determined energy is divided between at least one electrically operated main consumer and at least one electrically operated additional consumer, so that the at least one electrically operated main consumer has sufficient energy available to achieve the specified destination.

It is therefore a task to provide an energy-improved vehicle system for operating a particularly electrically operated vehicle.

The task is solved by a vehicle system with the features of claim 1. The subclaims list further advantageous measures that can be suitably combined with one another in order to achieve further advantages.

The object is achieved by a vehicle system for operating a vehicle with an on-board energy network, the vehicle system comprising an energy storage device which is designed to receive, store and deliver electrical energy to the on-board energy network, the vehicle system having currently set vehicle parameters and
several secondary consumers connected to the energy network with set consumer parameters, as well as at least one first main consumer connected via a DC/AC converter with main consumer parameters, and wherein a prediction unit is provided for estimating an occurring traffic situation at a specific future point in time and for determining or estimating, ie Predicting increased power consumption of the vehicle system in the estimated traffic situations occurring at specific future points in time,
wherein the vehicle system for preconditioning at least one preconditionable auxiliary consumer taking into account the currently set consumer parameter of the preconditionable auxiliary consumer and with regard to
is designed for the specific future times with increased power consumption and wherein the vehicle system is designed to temporarily switch off the at least one preconditioned auxiliary consumer at a respective future specific time with increased power demand in such a way that a power peak at the specific future times with increased power demand can be avoided or is reducible.

An auxiliary consumer can be a device in the vehicle that requires electrical power and thus electrical energy in order to function properly. examples for Such electrical auxiliary consumers can be, for example, heaters for the vehicle compartment, air conditioning systems for the vehicle compartment, refrigerated bodies on trucks for food transport, compressed air compressors with compressed air reservoirs for compressed air brakes on trucks, entertainment systems, electric drives and the like. Such additional consumers can be connected directly to the energy storage device or indirectly via a DC/DC converter to convert high-voltage voltage into low-voltage voltage to supply low-voltage devices.

A main consumer is, for example, an electric drive motor.

An energy storage device in an electric vehicle can be, in particular, a rechargeable battery, especially a high-voltage battery, or a plurality of connected vehicle batteries. Other energy storage devices include, for example, a fuel cell.

A traffic situation can describe a driving situation in which the vehicle is located, for example a braking situation/acceleration situation, in particular in which a current vehicle parameter, for example the speed, changes significantly, and as a result the electrical power requirement or the electrical energy requirement increases.

A prediction unit can use currently set vehicle parameters, for example 30 km/h, to determine whether acceleration will take place in the foreseeable future and, as a result, an increased electrical energy requirement will be necessary. A prediction unit can be designed as a software module with corresponding software, which is connected to the on-board sensors.

Temporary means over a short period of time, for example until the increased power requirement has ended or a limit has been reached, etc.

A future point in time is in the temporal environment of the vehicle, for example several seconds to a few minutes, but can also be designed as a time range and can extend over several seconds, for example an acceleration process.

According to the invention, it was recognized that it makes a difference in which period of time an electrical power is delivered. For example, the energy storage device, here a battery, can deliver a continuous current of 400 A. Whether the 400A is delivered in 30 minutes or 200A over an hour results in a significant difference in the power loss, since the current is calculated as the square of the power loss.

Current peaks can thus be avoided or reduced by the vehicle system according to the invention. These are caused on the one hand by temporarily switching off the preconditioned auxiliary consumers, as well as by prematurely calling up increased power (for example cooling down a battery to a lower temperature than is currently set). This will result in a reduction in power loss in the future by avoiding an increased voltage drop across the internal resistance of the battery and the development of heat in the electrical lines. This means that the maximum performance of an energy storage device, in particular a battery, can be accessed. In particular, the range of an electric vehicle also increases.

Avoiding current peaks at a future point in time therefore has an impact on the power loss at that future point in time. By reducing these current peaks, power losses can be avoided and, for example, the range of the electric vehicle can be increased by retrieving maximum energy. In dangerous situations/necessary traffic situations such as higher acceleration, such a temporary shutdown can also achieve an increase in performance. This means that more power with maximum peak performance can be available to the drive train at a future point in time, for example.

The vehicle system according to the invention can therefore achieve a more constant output of power if secondary consumers are preconditioned, that is, for example, cooled to lower temperatures in order to then temporarily switch them off when a higher power requirement is required, for example by the main consumer. By preconditioning one of the auxiliary consumers, no dangerous situations are created by simply switching off auxiliary consumers temporarily, such as cooling a battery. Furthermore, the preconditioning prevents unpleasant situations for the driver, such as switching off a heating/cooling system tion generated in a vehicle compartment. Through such preconditioning, all consumer parameters of the auxiliary consumers can be kept within specified limits without creating unpleasant situations for the driver or situations that are harmful to the vehicle's electrical system.

The vehicle system according to the invention makes it possible to increase efficiency and performance by temporarily switching off at least one, but preferably several, preconditioned auxiliary consumers when there are high performance requirements, without causing danger/damage to the vehicle components, in particular the sensitive electronics, such as batteries, etc.

In a further embodiment, the prediction unit is designed to estimate the occurring future traffic situation based on the currently set vehicle parameters, wherein the prediction unit is further designed to estimate the future vehicle parameters occurring during the estimated occurring future traffic situation at the specific future point in time, and wherein the prediction unit is further designed to estimate or determine the increased power consumption at the specific future point in time based on the currently set vehicle parameters in comparison to the estimated future vehicle parameters at the estimated future traffic situation.

Based on the currently set vehicle parameters, for example vehicle standstill/low vehicle speeds, for example 30 km/h, the prediction unit can estimate that, for example, acceleration is likely in the near future. For example, increased power consumption can be estimated based on the expected acceleration.

In a further embodiment, a navigation system is provided for entering the navigation route and the prediction unit is designed to estimate the occurring future traffic situation based on the navigation route and the currently set vehicle parameters and the prediction unit is further designed to estimate the future traffic situation occurring during the estimated future traffic situation at the specific location to estimate future vehicle parameters occurring at a future point in time in connection with the navigation route.

This means that both the future traffic situation, for example a motorway entrance, and the future vehicle parameters, for example high acceleration during the entrance, can be better determined.

In a further embodiment, the vehicle system has a data interface for receiving external environmental data relating to the vehicle's surroundings, the prediction unit being designed to estimate the future traffic situation at a specific future point in time using the environmental data and to estimate the future traffic situation during the estimated future traffic situation to estimate future vehicle parameters occurring at a specific future time and wherein the prediction unit is further designed to estimate the increased power consumption at a specific future time based on the currently set vehicle parameters in comparison to the estimated future vehicle parameters at the estimated future traffic situation, i.e. at the specific future time , to estimate or to determine.

Such a data interface can, for example, be designed to implement V2V or V2x communication in order to obtain information regarding the environment/environment. V2V communication is primarily an exchange of information and data between motor vehicles and V2X communication is communication between vehicles and their surroundings, especially the infrastructure.

Such data can, for example, concern information about upcoming speed restrictions, traffic lights/roundabouts, intersections, slopes, motorway entrances, from which, for example, acceleration can be derived, for example the lifting of a speed limit, for example from 50 km/h to 80 km/h, acceleration after traffic lights/ Roundabouts, intersections and motorway entrances or an incline, i.e. traffic situations in which more electrical power is required, can be better identified.

In a further development, a navigation system is provided for entering the navigation route and the prediction unit is designed to estimate the future traffic situation using the environmental data and the navigation route as well as the during the estimated future ver traffic situation to estimate future vehicle parameters occurring at the specific future time and wherein the prediction unit is further designed to estimate the increased power consumption at a specific future time based on the currently set vehicle parameters in comparison to the estimated future vehicle parameters occurring at the estimated future traffic situation or to determine.

This means that both the future traffic situation, for example a motorway entrance, and the future vehicle parameters, for example high acceleration during the entrance, can be better determined.

In further training, the environmental data at least relate to upcoming speed changes. In particular, speed changes such as accelerations are largely responsible for increased power consumption.

In a further embodiment, the vehicle system has a memory unit in which a lower limit and / or upper limit is stored in relation to a preconditionable consumer parameter of a preconditionable auxiliary consumer, the vehicle system being designed to stop a respective preconditioned auxiliary consumer from being switched off when the predetermined upper limit or lower limit in relation to the consumer parameter has been reached or exceeded. If the auxiliary consumer is, for example, a cooling system of a vehicle component, this is not endangered by switching off the auxiliary consumer, here the cooling system. Such an upper or lower limit can be tailored to the respective preconditionable secondary consumer. For example, the set temperature in a vehicle compartment can vary more without causing damage to vehicle components than is possible when cooling a battery / electrical system / electronics. For example, a 650V / 24 V DC/DC converter or an existing 24V battery can also be deactivated for a certain time, taking the charge status into account, until the voltage of the 24V battery/converter falls below a limit

In a further embodiment, the vehicle system has a memory unit in which an upper threshold value and a threshold lower value are stored in relation to the consumer parameter of a preconditionable secondary consumer, and wherein the vehicle system is further designed to precondition a respective preconditionable secondary consumer in relation to the respective consumer parameter only up to the specified upper threshold value and the specified lower threshold value.

For example, it can be specified that the set temperature in a vehicle compartment can deviate by up to 3 degrees without causing a high degree of discomfort to the driver, but when cooling an electronic component may only deviate by 1 degree.

In further training, the upper threshold value and the lower threshold value are identical to the upper limit and the lower limit. This can therefore be set once in relation to a respective secondary consumer.

In a further embodiment, the at least one preconditionable consumer parameter is designed as a temperature. This is particularly easy and quick to measure and regulate with the preconditionable auxiliary consumers.

In particular, the at least one preconditionable auxiliary consumer can be used as a temperature system of a vehicle compartment and/or as a temperature system of a DC/AC converter and/or as a cooling system of the at least one energy storage device and/or as a cooling system of an air conditioning compressor and/or as a temperature system of an electric steering pump and/or or an air conditioning system and/or as a cooling system of an air compressor and/or as cooling systems for batteries present in the vehicle system. These auxiliary consumers can simply be preconditioned with regard to their temperature and therefore simply switched off temporarily.

In a further embodiment, the consumer parameter is designed as a temperature, with premature cooling/premature heating of the at least one preconditionable secondary consumer being able to be achieved as preconditioning, and a storage unit being provided in which a first upper temperature limit and specified in relation to the respective preconditionable secondary consumer first lower temperature limit is stored, and wherein the vehicle system is designed to do so Switching off a correspondingly prematurely heated or prematurely cooled secondary consumer can only be accomplished until the stored first upper temperature limit and first lower temperature limit are reached. This means that dangerous situations can be avoided, for example for electronics that need to be cooled. Depending on a measured temperature and temperature models of the auxiliary consumers, the cooling/heating of the auxiliary consumers is only suspended for a long time so that no temperature limit is violated.

In a further embodiment, a first upper threshold temperature value and a specified second threshold temperature lower value are stored in the memory unit in relation to the respective preconditionable auxiliary consumer, and the vehicle system is designed to precondition a respective preconditionable auxiliary consumer only up to the specified upper threshold temperature value or the specified threshold lower temperature value.

In a further embodiment, the vehicle system has a compressed air brake system with an air pressure reservoir, with the at least one preconditionable secondary consumer being designed as a filling system, for example an air compressor, for filling the air pressure reservoir with compressed air. This additional consumer is also suitable for preconditioning.

In a further embodiment, the prediction unit is designed to carry out preconditioning of at least one preconditionable auxiliary consumer continuously throughout the entire journey and the vehicle system is designed to temporarily switch off such a preconditioned auxiliary consumer continuously throughout the journey, so that current peaks during the can be avoided or at least reduced throughout the journey. Through the permanent, independent, continuous preconditioning and switching off of preconditioned auxiliary consumers, such power peaks can be avoided throughout the journey, which, for example, extremely increases the range of a vehicle with such an energy storage device, in particular an electric vehicle.

• 1: ein Fahrzeugsystem gemäß dem Stand der Technik,
• 2: eine typische Lade-/Entladekurve einer Lithium-Ionen-Batterie,
• 3: ein Fahrzeug mit einem Fahrzeugsystem gemäß der Erfindung.

Further properties and advantages of the present invention emerge from the following description with reference to the accompanying figures. It shows schematically:

• 1 : a vehicle system according to the state of the art,
• 2 : a typical charge/discharge curve of a lithium-ion battery,
• 3 : a vehicle with a vehicle system according to the invention.

1 shows a vehicle system 100 with a rechargeable battery 200 (also referred to as a battery) as energy storage. The capacity of the battery 200 determines the distance that can be covered without charging in the meantime. Through chemical processes in the battery 200, energy can be stored and released again when needed. Lithium-ion batteries in particular are currently used.

A high-voltage on-board electrical system 700 is connected to the battery 200 to supply high-voltage auxiliary consumers 800, such as steering and air conditioning, and low-voltage auxiliary consumers 300, which are supplied from the on-board electrical system 700 via a DC/DC converter 400. Such low-voltage auxiliary consumers 300 can be, for example, the on-board electronics such as radio, lighting, windshield wipers and cruise control and a low-voltage battery 140, which stores energy that is generated when braking.

Furthermore, a first electric motor 500 and a second electric motor 500a are provided as main consumers, each of which is connected to the high-voltage vehicle electrical system 700 via a DC/AC converter 600a, 600b. The electrical energy from the battery 200 is fed into the electric motors 500, 500a as required.

A DC/AC converter 600a, 600b can convert an input voltage into an AC voltage with the same input voltage, but cannot increase the voltage.

Furthermore, a further DC/DC converter 900 can be provided in the high-voltage vehicle electrical system 700 in order to maintain the DC voltage for the DC/AC converters 600a, 600b and the electric motor 500, 500a connected to them at a constant level regardless of the voltage of the battery 200 hold. However, for cost reasons, the DC/DC converter 900 is often omitted.

The battery voltage therefore varies without the DC/DC converter 900 depending on the state of charge (SOC), where the SOC is a characteristic value for the state of charge of the rechargeable battery 200.

For example, several batteries 200 (rechargeable batteries) can also be included as energy storage devices.

2 shows a typical charge/discharge curve 14, 13 of a lithium-ion battery 200 (lithium-ion battery) without a DC/DC converter 900. The voltage y varies, here for example between approx. 640V and approx. 750V, depending on the SOC (State of Charge) x.

The maximum current that the high-voltage battery 200 can deliver is limited, for example, by the following operations: on the one hand, by a very high charge level or by a very low charge level, as well as by unfavorable battery temperatures.

The power to be delivered (P = U*I) of the battery 200 therefore decreases as SOC x decreases. This power is distributed to the electric motor 500,500a and the low-voltage auxiliary consumers 300 and the high-voltage auxiliary consumers 800.

According to the invention, it was recognized that it is essential the period of time in which electrical power is delivered, for example whether a 400 A continuous current from the battery 200 over 30 minutes (half an hour), ie, or 200 A over an hour (1 hour) is delivered. When delivering 400 A continuous current in one hour, a power loss of 160 kW and a work loss of 80 kWh are generated, but when delivering 200 A over an hour only 40 kW power loss and a work loss of 40 kWh are generated with the same resistance R, as the following table shows: Time t[h] 0.5 1 Current I[A] 400 200 Resistance R[Ohm] 1 1 Power loss [kW] = R*I^2 160 40 Work loss [kWh] = time*power loss 80 40

3 zeigt eine erste Ausgestaltung eines erfindungsgemäßen Fahrzeugsystems 1 für ein Fahrzeug 10. Dabei wird das Fahrzeug 10 mit eingestellten Fahrzeugparametern betrieben.The 400A delivery of current in half an hour or the 200A delivery over an hour creates a significant difference in the power loss, since the current is calculated as the square of the power loss: $$\text{Power loss}\left[\text{kW}\right]=R\ast I^2$$

3 shows a first embodiment of a vehicle system 1 according to the invention for a vehicle 10. The vehicle 10 is operated with set vehicle parameters.

This has high-voltage auxiliary consumers as well as low-voltage auxiliary consumers as well as at least one rechargeable battery 2 and electric motors 5.5a ( 1 ), which are fed by the battery 2 via the high-voltage vehicle electrical system 7 via a DC/AC converter 6a, 6b.

Furthermore, the vehicle system 1 has a prediction unit 11, for example in the form of a computer module with appropriate hardware.

This is designed to estimate a traffic situation that will occur at a specific future point in time.

The prediction unit 11 can be designed to estimate the occurring future traffic situation based on the currently set vehicle parameters and also to estimate the future vehicle parameters occurring during the estimated future traffic situations occurring at the specific future point in time. Furthermore, the navigation route/driving route can be included, which can be entered, for example, via a navigation system 4.

The prediction unit 11 can then, for example, estimate the vehicle parameters that arise at this point, such as acceleration, based on the vehicle route, for example highway entrance, incline. Your own sensors/environmental sensors can also be used to assess and take into account the vehicle route ahead.

Alternatively or additionally, a data interface 8 can be provided for receiving external environmental data relating to the environment of the vehicle 10. Such a data interface 8 can, for example, be designed to implement V2V or V2x communication in order to obtain information regarding the environment/environment.

V2V communication is primarily an exchange of information and data between motor vehicles and V2X communication is communication between vehicles and their surroundings, especially the infrastructure. Such external data is, for example, information about speed restrictions, traffic lights/roundabouts, intersections, traffic density, gradients, motorway entrances, etc. From this, the prediction unit 11 can derive where the vehicle 10 must accelerate, for example after speed restrictions of 50 km/h to 80 km/h, acceleration after traffic lights/roundabouts or accelerating after the end of a traffic jam, at intersections and motorway entrances, which requires more power.

The prediction unit 11 can estimate the future traffic situation at a specific future point in time using the environmental data and estimate the future vehicle parameters occurring during the estimated future traffic situation at the specific future point in time. Furthermore, in order to improve the future traffic situation at a specific future point in time, the navigation route, which can be entered, for example, via a navigation system 4, can also be used.

Based on the estimated future vehicle parameters and the current vehicle parameters, an increased power consumption of the vehicle system 1 in the estimated traffic situation at a certain future point in time can now be estimated, i.e. predicted. This allows the upcoming points in time with increased power consumption to be determined.

Furthermore, the vehicle system 1 is designed to carry out preconditioning of at least one or more preconditionable secondary consumers 12, for example preconditionable high-voltage secondary consumers and/or preconditionable low-voltage secondary consumers, at these determined times. The preconditioning is carried out using the currently set consumer parameters of at least one or more preconditionable secondary consumers 12 with regard to the specific future times with increased power consumption.

In particular, these preconditionable secondary consumers 12 can have temperature as a preconditionable consumer parameter.

• - Klimaanlage für Fahrzeuginnenraum und für Kühlaufbauten bei LKWs
• - Luftdruckpresser für Druckluftbremse
• - Kühl-/ Heizsysteme des Fahrzeugraums, von Batterien
• - Kühlsysteme für den DC/AC-Wandler oder/und der Elektromotoren oder einen Antriebsstrang, Klimakompressor, elektrische Lenkungspumpe, Luftdruckpresser etc.

Some non-exhaustive examples of secondary consumers 12 that can be preconditioned with regard to temperature are listed below:

• - Air conditioning for vehicle interiors and for refrigerated truck bodies
• - Air compressor for air brakes
• - Vehicle compartment cooling/heating systems, batteries
• - Cooling systems for the DC/AC converter and/or the electric motors or a drive train, air conditioning compressor, electric steering pump, air compressor, etc.

The set/prevailing temperature is taken into account and, for example, early cooling/heating can be carried out as preconditioning in view of the increased power consumption.

There can be an upper threshold value and a lower threshold value in relation to a set temperature of a preconditionable secondary consumer 12, which may not be exceeded or fallen below during preconditioning. These can be stored in a storage unit 3, for example. For example, a set temperature in the vehicle compartment can deviate up or down by 3 degrees, i.e. the vehicle compartment is cooled prematurely or heated by an air conditioning system as an auxiliary consumer 12. If the auxiliary consumer 12 is, for example, the cooling system of a battery, the upper/lower threshold value can also be a deviation of 1 degree, for example.

For example, preconditioning can include premature cooling/heating of the vehicle compartment by an air conditioning system, cooling existing batteries by a cooling system, premature cooling of the DC/AC converters 6a, 6b or the electric motors 5,5a, an air conditioning compressor or an electric steering pump, or an air pressure compressor can be carried out by a corresponding cooling system as a preconditionable auxiliary consumer 12.

Furthermore, the vehicle system 1 temporarily switches off the preconditioned auxiliary consumer 12 at the future point in time with the increased power requirement in such a way that a current peak at the future point in time can be avoided or even reduced. Depending on the determined power requirement, several additional consumers 12 can also be preconditioned and then switched off. Temporary means, for a short period of time, for example, until the increased power requirement has ended. Alternatively, depending on a temperature measured during shutdown and a specified upper temperature limit and upper temperature limit, the cooling/heating of the preconditioned auxiliary consumer is only suspended for a long time so that no temperature limit is violated.

Furthermore, existing 24V (low-voltage) batteries (not shown) can be deactivated as preconditionable auxiliary consumers 12 for a certain time, taking the state of charge (SOC) into account, until the voltage as a consumer parameter of the 24V battery (not shown) falls below the specified lower limit.

Furthermore, the vehicle system 1 can have a compressed air brake system with an air pressure reservoir (not shown), with the at least one preconditionable auxiliary consumer 12 being designed as an air compressor for filling the air pressure reservoir (not shown) with compressed air. This additional consumer is also easily suitable for preconditioning.

By switching off, current peaks can be avoided or reduced, which has a positive effect on power loss.

The vehicle system 1 according to the invention makes it possible to increase efficiency and performance by temporarily switching off at least one, but preferably several, preconditioned auxiliary consumers 12 when high performance requirements are required, without posing a danger to vehicle components or the auxiliary consumers 12 themselves, in particular the sensitive electronics, such as batteries, etc Damage occurs. By calling up constant power through preconditioning, the maximum power can be exploited without power loss, for example from the battery 2, which extends the range of the vehicle 10, for example.

Reference symbol list

100

Vehicle system (state of the art)

200

Battery (state of the art)

140

Low voltage battery

300

Low-voltage auxiliary consumers (state of the art)

400

DC/DC converter (state of the art)

500,500a

Electric motor (state of the art)

600,600a

DC/AC converter (state of the art)

700

High-voltage electrical system (state of the art)

800

High-voltage auxiliary consumers (state of the art)

900

DC/DC converter (state of the art)

1

Vehicle system

2

battery

3

Storage unit

4

navigation system

5.5a

Electric motor

6.6a

DC/AC converter

7

High-voltage on-board electrical system

8th

Data interface

10

vehicle

11

Prediction unit

12

preconditionable auxiliary consumers

13

Unloading

14

Load

x

State of Charge (SOC)

y

Open circuit voltage

QUOTES INCLUDED IN THE DESCRIPTION

This list of 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.

Cited patent literature

• DE 102010029971 A1 [0004]

Claims (15)

Vehicle system (1) for operating a vehicle (10) with an on-board energy network (7), the vehicle system (1) comprising an energy storage device which is designed to receive, store and deliver electrical energy to the on-board energy network (7), wherein the vehicle system (1) has currently set vehicle parameters and several additional consumers connected to the energy network (7) with set consumer parameters, as well as at least one first main consumer connected via a DC/AC converter (6,6a) with main consumer parameters, characterized in that a prediction unit (11) is provided for estimating an occurring traffic situation at a specific future point in time and for determining or estimating an increased power consumption of the vehicle system (1) in the estimated occurring traffic situations at specific future points in time, the vehicle system (1) for preconditioning at least one preconditionable auxiliary consumer (12) is designed taking into account the currently set consumer parameter of the preconditionable auxiliary consumer (12) and with regard to the specific future points in time with increased power consumption and wherein the vehicle system (1) is designed to have increased power requirements at a respective future specific point in time to temporarily switch off the at least one preconditioned auxiliary consumer (12) in such a way that a current peak at the specific future times with increased electricity demand can be avoided or at least reduced. Vehicle system (1). Claim 1 , characterized in that the prediction unit (11) is designed to estimate the occurring future traffic situation based on the currently set vehicle parameters and wherein the prediction unit (11) is further designed to estimate the occurring future traffic situation occurring during the estimated future traffic situation at the specific future point in time to estimate future vehicle parameters and wherein the prediction unit (11) is further designed to estimate or determine the increased power consumption at the specific future point in time based on the currently set vehicle parameters in comparison to the estimated future vehicle parameters at the estimated future traffic situation. Vehicle system (1). Claim 2 , characterized in that a navigation system (4) is provided for entering the navigation route and the prediction unit (11) is designed to estimate the occurring future traffic situation based on the navigation route and the currently set vehicle parameters and the prediction unit (11) is further designed to do so is to estimate the future vehicle parameters occurring during the estimated future traffic situation at the specific future point in time in connection with the navigation route. Vehicle system (1) according to one of the preceding claims, characterized in that the vehicle system (1) has a data interface (8) for receiving external environmental data relating to the environment of the vehicle (10) and wherein the prediction unit (11) is designed to to estimate the future traffic situation at a specific future time using the environmental data and to estimate the future vehicle parameters occurring during the estimated future traffic situation at the specific future time, and wherein the prediction unit (11) is further designed to estimate the increased power consumption at a specific future time based on the currently set vehicle parameters compared to the estimated future vehicle parameters based on the estimated future traffic situation. Vehicle system (1). Claim 4 , characterized in that a navigation system (4) is provided for entering the navigation route and wherein the prediction unit (11) is designed to estimate the future traffic situation using the environmental data and the navigation route as well as the estimated future traffic situation at the specific future to estimate future vehicle parameters occurring at a specific time and wherein the prediction unit (11) is further designed to estimate or estimate the increased power consumption at a specific future time based on the currently set vehicle parameters in comparison to the estimated vehicle parameters occurring in the future at the estimated future traffic situation determine. Vehicle system (1). Claim 4 or 5 , characterized in that the environmental data relates at least to upcoming speed changes. Vehicle system (1) according to one of the preceding claims, characterized in that the vehicle system (1) has a storage unit (3) in which a lower limit and / or upper limit is stored in relation to a preconditionable consumer parameter of a preconditionable secondary consumer (12), and wherein the vehicle system (1) is designed to switch off a respective preconditioned auxiliary consumer (12) when the predetermined upper or lower limit in relation to the consumer parameter is reached or exceeded. Vehicle system (1) according to one of the preceding claims, characterized in that the vehicle system (1) has a storage unit (3) in which an upper threshold value and a threshold lower value are stored in relation to the consumer parameter of a preconditionable secondary consumer (12), and wherein the vehicle system (1) is further designed to precondition a respective preconditionable secondary consumer (12) with respect to the respective consumer parameter only up to the specified upper threshold value and specified lower threshold value. Vehicle system (1). Claim 7 and 8th , characterized in that the upper threshold value and the lower threshold value are identical to the upper limit and the lower limit. Vehicle system (1) according to one of the preceding claims, characterized in that the at least one preconditionable consumer parameter is designed as a temperature. Vehicle system (1) according to one of the preceding claims, characterized in that the at least one preconditionable auxiliary consumer (12) is used as a temperature system of a vehicle compartment and/or as a temperature system of a DC/AC converter (6,6a) and/or as a cooling system of the at least an energy storage device and/or as a cooling system of an air conditioning compressor and/or as a temperature system of an electric steering pump and/or an air conditioning system and/or as a cooling system of an air pressure compressor and/or as cooling systems for low-voltage batteries present in the vehicle system (1). Vehicle system (1) according to one of the preceding claims, characterized in that the consumer parameter is designed as a temperature and premature cooling/premature heating of the at least one preconditionable auxiliary consumer (12) can be achieved as preconditioning, and wherein a storage unit (3) is provided, in which a first upper temperature limit and a defined first lower temperature limit defined in relation to the respective preconditionable auxiliary consumer (12) are stored, and wherein the vehicle system (1) is designed to switch off a correspondingly prematurely heated or prematurely cooled auxiliary consumer (12) only up to to achieve the stored first upper temperature limit and first lower temperature limit. Vehicle system (1). Claim 12 , characterized in that a first upper threshold temperature value and a fixed second threshold temperature lower value are stored in the storage unit (3) in relation to the respective preconditionable auxiliary consumer (12), and wherein the vehicle system (1) is designed to precondition a respective preconditionable auxiliary consumer (12 ) only to be accomplished up to the specified upper threshold temperature value or the specified lower threshold temperature value. Vehicle system (1) according to one of the preceding claims, characterized in that the vehicle system (1) has a compressed air brake system with an air pressure reservoir, the at least one preconditionable auxiliary consumer (12) being designed as a filling system for filling the air pressure reservoir with compressed air. Vehicle system (1) according to one of the preceding claims, characterized in that the prediction unit (11) is designed to carry out preconditioning of at least one preconditionable auxiliary consumer (12) continuously throughout the entire journey and wherein the vehicle system (1) is further designed to: a respective temporary shutdown of such a preconditioned auxiliary consumer (12) is to be accomplished continuously throughout the entire journey, so that current peaks can be avoided or at least reduced during the entire journey.

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