DE102015226061A1 - Method for a dynamic energy management in a motor vehicle and a related system and motor vehicle - Google Patents

Abstract

The invention relates to a method for a dynamic energy management in a motor vehicle (100). In this case, the motor vehicle (100) has an electrical energy source (110) and electrical consumers (120). The method comprises: determining (10) a maximum deliverable power (Pmax) of the electrical energy source (110). Determining (20) a currently provided power (PaktV) of the electrical energy source (110) to the electrical consumers (120) of the motor vehicle (100). Predicting (30) a vehicle situation (31) occurring at a future time (t). Predicting (40) a power (PtV) required at the future time (t) for the electrical consumers (120) of the motor vehicle (100). Determining (50) whether the electrical energy source (110) can deliver the power (V) needed for the future time (t). And if the electric power source (110) can not output the power (PtV) required for the future time (t): determining (51) a power deficiency (Pdef) of the electric power source (110). Determining (52) power consumers (121) of the motor vehicle (100) to be disconnected at the future time (t). Switching off (53) the determined power consumers (121) to be disconnected. And provide (54) the required power (PtV). The invention further relates to a corresponding system (200) and a corresponding motor vehicle (100).

Description

The present invention relates to a method for a dynamic energy management in a motor vehicle and a related system and motor vehicle.

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

In order to be able to supply the many electrical consumers in motor vehicles with effective electrical energy, an effective energy management is important in order not to overload the electrical system of the motor vehicle.

A common method is the use of a static priority control for the electrical consumers.

Another method is a method that provides consumers with the energy they need statically according to supply and demand.

Therefore, it would be desirable to provide a possibility which enables energy management for a vehicle electrical system in the motor vehicle, which optimally provides the respective existing electrical energy to the consumers and avoids or can regulate energy bottlenecks as best as possible.

It is an object of the invention to propose a possibility which avoids or at least reduces at least some of the disadvantages known in the prior art.

The object is achieved by a method according to the main claim, and by means of a system according to an independent claim.

The subject of the main claim relates to a method for a dynamic energy management in a motor vehicle, wherein the motor vehicle has an electrical energy source and electrical consumers. In this case, the method comprises determining a maximum deliverable power of the electrical energy source. Determining a currently provided power of the electrical energy source to electrical consumers of the motor vehicle. Predicting a vehicle situation occurring at a future time. Predicting a required for the future time performance for the electrical consumers of the motor vehicle, based on the predicted entering vehicle situation. Determine if the electrical energy source can deliver the power needed for the future, based on the required power, current power, and maximum deliverable power. And if the electric power source can not deliver the power required for the future time, the method further comprises: determining a power deficiency of the electric power source based on the required power, the currently provided power, and the maximum deliverable power. Determining disconnected power consumers of the motor vehicle, such that the power sum of the disconnected power consumers is suitable to compensate for the power deficit at least partially. Disconnecting the determined disconnected power consumers. And provide the required power.

The process steps can be carried out automatically.

An electrical energy source in the sense of the invention can be a device or a device matrix which can supply the motor vehicle with required electrical energy. In particular, the electrical energy source can have an active and / or a passive electrical energy source. In this case, a passive electrical energy source means an energy store. Such an energy storage device may be a vehicle battery, such as a high-voltage battery, in the case of an energy storage device for a motor vehicle. Also, a plurality of vehicle batteries may be connected to each other so as to function as a single vehicle battery. The plurality of vehicle batteries may also be arranged in a corresponding matrix in order to function as a vehicle battery. An active electrical energy source can be an energy source that generates its deliverable electrical energy itself. An example of such an active electrical energy source may be a fuel cell or even an array of fuel cells that collectively act as a fuel cell. In either case, such electrical energy sources can provide only finite maximum electrical power. Also, you can thus provide only a finite maximum energy per hour.

An electrical consumer within the meaning of the invention may be a device of the motor vehicle, which requires electrical power and thus electrical energy in order to function properly. Examples of such electrical consumers may be control devices, heaters, air conditioners, entertainment system, electric drives and the like.

A power within the meaning of the invention means an electrical power.

Predicting within the meaning of the invention can be predicting a situation or an event, a time, an electrical power to be output and electrical energy.

A future point in the sense of the invention may be a point in time which is only a few seconds in the future. Preferably, this may be a time that will occur within 120 seconds. More preferably, the future time is no more than 60 seconds in the future. In particular, the future time is no more than 10 seconds in the future.

A vehicle situation in the sense of the invention means that a current vehicle state will change significantly with respect to an electrical power requirement or an electrical energy requirement.

In this case, the forecasting of the future point in time can take place in that sensor information of the motor vehicle is evaluated, and the evaluation shows that a change of the vehicle situation will occur at a future point in time. Such a vehicle situation may, for example, be a greatly increased power supply to an electrical device or for a vehicle function, for example in the case of a strong braking maneuver that predicts deployment of an electronic stability system, increased supply to corresponding control devices of the motor vehicle, electronic stability control a forecasted cornering. Such a prognosis can take place in that, for example, an optical sensor device or an optical sensor system detects a preceding curve, the current speed is classified as too high for safe cornering in the current driving mode and no corresponding braking maneuver is registered. As a result, for example, the prognosis can be made that the motor vehicle will reach the curve at a specific future point in time, and the corresponding driver assistance systems that are required to subsequently guide the driver safely through the curve will have a correspondingly increased power requirement or energy requirement.

The increased power requirement can be provided, for example by means of expert knowledge situational in a database. This can be particularly useful if the increased power requirement is not readily calculable by a computer. Another possibility can be that a correspondingly adaptive algorithm is used in a computer in order to be able to estimate the increased power requirement more precisely in the long term.

A power deficit in the sense of the invention means that, in the event that a forecasted increased power demanded by the electrical energy source at the future time point can not be sufficiently provided, that difference between the power forecast at the future time and that predicted from the power supply electrical energy source at the future time deliverable power.

The required power can be a peak power.

By determining the power deficit and a corresponding shutdown of electrical consumers can be present a best possible situational management strategy for energy management.

It may be possible that the performance deficit is not fully compensated or can be compensated. Preferably, the power deficit can be compensated by the corresponding shutdown of electrical loads.

A power consumer to be disconnected within the meaning of the invention may mean an electrical consumer who can be switched off electrically so that he no longer needs any power. Thus, therefore, an electrical consumer is meant, which can be switched off.

The shutdown of a disconnected power consumers takes place for the future time.

In this case, the switching off of a power consumer to be disconnected can take place at a time before the future time. Particularly in cases where the predicted vehicle situation is not critical, in terms of a danger to the motor vehicle and / or an occupant of the motor vehicle and / or a person outside the motor vehicle, switching off a power consumer to be disconnected may occur at a time prior to the future Timing. In such cases, the shutdown of a power consumer to be shut down may occur at a time after the future time. In cases where the predicted vehicle situation is critical or can become critical, the shutdown of the power consumers can be switched off at the future time. At the future time can be a small mean time deviation, so that the shutdown of a disconnected power consumers also occur shortly before or shortly after the future date. A time shortly before or shortly after the future time may have a small time deviation of up to 50% from the time between the time of prediction of the future time to the predicted future time. Preferably, the time deviation up to 25% of this period. Particularly preferably, the temporal deviation up to 10% of this period.

The teaching according to the invention achieves the advantage that predictive energy management can be provided in order to meet the increased power requirements, caused by an ever-increasing increase in electrical consumers in the motor vehicle, in order not to overstrain the electrical system of the motor vehicle.

The subject matter of an independent claim relates to a system for dynamic energy management in a motor vehicle, the system comprising: an electrical energy source. A monitoring device for monitoring the performance of the electrical energy source. A majority of electrical consumers. Another monitoring device for power consumption monitoring of the electrical consumers. A control device for controlling the electrical consumers. A prediction tool for predicting a vehicle situation occurring at a future time. And another prediction means for predicting a power required at the future time for the electrical consumers of the motor vehicle based on the predicted incoming vehicle situation. And the system is set up to carry out any method according to the invention.

The teaching according to the invention provides the advantage that a predictive energy management system can be provided in order to meet the increased power requirements caused by an ever-increasing increase in electrical consumers in the motor vehicle in order not to overstrain the vehicle electrical system.

A further advantage is that the system according to the invention can also be used as a retrofit kit in motor vehicles already in the field, ie on the market.

The subject of another independent claim relates to a motor vehicle, comprising an electrical energy source, electrical consumers and any system according to the invention, wherein the system according to the invention is operable by any method according to the invention.

The teaching according to the invention achieves the advantage that a motor vehicle with a predictive energy management system can be made available in order to meet the increased power requirements caused by an ever-increasing increase in electrical consumers in the motor vehicle, not to the vehicle electrical system overwhelm.

The subject matter of a further independent claim relates to a computer program product for any system according to the invention, the system being operable by any method according to the invention.

The teaching according to the invention achieves the advantage that the method can be carried out in a particularly efficient automated manner.

The subject matter of a further independent claim relates to a data carrier comprising a computer program product according to the invention.

The teaching according to the invention achieves the advantage that the method can be distributed or kept in a particularly efficient manner on the devices, systems and / or motor vehicles carrying out the method.

Before describing embodiments of the invention in more detail below, it should first be noted that the invention is not limited to the described components or the described method steps. Furthermore, the terminology used is not a limitation, but has only exemplary character. Insofar as the singular is used in the description and the claims, the plural is included in each case, unless the context explicitly excludes this. Any method steps can, if the context does not explicitly exclude this, be carried out automatically. Corresponding method sections can lead to corresponding device properties and vice versa, so that, unless the context explicitly excludes this, a change of a method feature into a device feature is made possible and vice versa.

Hereinafter, further exemplary embodiments of the method according to the invention will be explained.

According to a first exemplary embodiment, the method further comprises: Determining a maximum deliverable energy of the electrical energy source, taking into account a not to be exceeded residual energy value of the electrical energy source. Determining a currently available energy of the electrical energy source. Predicting a required energy for a future period for the electrical consumers of the motor vehicle, based on the predicted entering vehicle situation, wherein the future period begins at the future time. Determine if the electrical energy source can deliver the energy needed for the future period, based on the required energy and energy. And if the electrical energy source can not deliver the energy needed for the future period: determining an energy deficit of the electrical energy source based on the required energy and the currently available energy. Determining the energy consumers of the motor vehicle to be disconnected such that the energy sum of the energy consumers to be disconnected is suitable, at least partially, for compensating for the energy deficit until it reaches the future point in time. Disconnecting the determined disconnected energy consumers. And provide the needed energy for the future period.

An energy in the sense of the invention means an electrical energy.

The energy related characteristics are analogous to the corresponding performance related features. Thus, for example, an energy deficit means an electrical energy deficit, which is understood to be analogous to the power deficit.

It may be possible that the energy deficit is not fully compensated or can be compensated. Preferably, the energy deficit can be compensated by the corresponding shutdown of electrical consumers.

This embodiment has the advantage that the dynamic energy management can be further improved by not only situationally predicting an instantaneous electric power at the future time, but thus observing that power over a period of time starting at the future time So not only the electrical power but also the electrical energy is taken into account. As a result, an even more reliable energy management can be provided.

According to a further exemplary embodiment, the method further comprises determining the energy consumers of the motor vehicle to be disconnected, taking into account the determined power consumers to be disconnected in the future.

This may therefore make sense, since electrical consumers that are to be switched off due to the power deficit, also contribute to reducing the energy deficit or contribute after their electrical shutdown.

This embodiment has the advantage that already determined turn-off consumers are taken into account, so that not too many electrical loads need to be switched off.

According to a further exemplary embodiment, the method further comprises determining the power consumers to be disconnected in such a way that initially consumers that can be switched off for a short time are provided as power consumers to be disconnected. And if their total power is not sufficient to compensate for the power shortage, then only additional turn-off consumers are provided as disconnected power consumers.

A short-term disconnectable consumer within the meaning of the invention may be an electrical consumer who is not directly required for the future time and / or current time. Preferably, this may be a consumer who changes its operating state only sluggishly without the supply of electrical energy, so that without or without significant effect of the behavior of these consumers is temporarily switched off. A possible example of such a short-term disconnectable consumer may be a seat heater.

This refinement has the advantage that an energy management can thereby be provided which, in the case of a predicted power deficit or energy deficit, is perceived by a vehicle user to be less restrictive.

According to a further exemplary embodiment, the method further comprises: determining a number of persons in the motor vehicle. Determining a user power consumption of each person, wherein the determination of the user power consumption is based on those electrical consumers, which are each assigned to the corresponding person. Providing a user behavior group having a first user behavior and a further user behavior, wherein each user behavior of the user behavior group has a power consumption range. And group people according to their user behavior into the user behavior group. And there is the determination of disconnected Energy consumers of the motor vehicle, including the groupings of persons in the user behavior group.

Furthermore, a frequency of a change in the user consumption group of a vehicle occupant can also be taken into account.

This refinement has the advantage that electrical consumers to be disconnected can be better determined, taking into account the perceptibility or non-perceptibility of switching off the corresponding consumers.

Another advantage is that an even more precise dynamically functioning energy management can be provided.

According to a further exemplary refinement, the method further comprises that the prediction of the vehicle situation occurring at the future time point takes place with probability taking into account a relevance threshold. And predicting the power needed at the future time and / or predicting the energy needed for the future period is done with probability, taking into account the corresponding further relevance threshold.

A relevance threshold in the sense of the invention may mean that a prognosis is only considered if its probability of occurrence exceeds a threshold value, thus the probability of occurrence of the prognosis being classified as relevant.

This embodiment has the advantage that an even more reliable dynamic energy management can be provided.

According to a further exemplary embodiment, the method further comprises modifying the energy required for the future period if the currently existing energy of the electrical source deviates from a specified target energy range of the electrical energy source. In this case, the specified nominal energy range of the electrical energy source is dependent on technical parameters of the electrical energy source. And this involves modifying the energy required for the future period in such a way that at the end of the future period, the currently available energy of the electrical energy source is within the solar energy range.

Technical parameters of the electrical energy source in the context of the invention can take into account the physical or technical structure or the construction of the electrical energy source. Examples of these may be the materials used to use the energy storage.

This refinement has the advantage that the specific electrical energy store used and its actual physical performance can be taken into account for the energy management. As a result, even more reliable dynamic energy management can be provided.

According to a further exemplary refinement, the method further comprises that the specified nominal energy range of the electrical energy source also takes into account a vehicle user request, in particular by means of a corresponding impact or impact on that solar energy range which results from the technical parameters of the electrical energy source.

For example, it can thus be taken into account whether a vehicle user would rather be more economical with regard to his energy consumption, since he attaches greater importance, for example, to a better recharging of the electrical energy store of the motor vehicle. In contrast, another vehicle user better recharge may not be as important as rapid acceleration ability of his motor vehicle, for example, because he wants to travel only a short distance until he wants to recharge the electrical energy source of the motor vehicle again longer.

This embodiment has the advantage that an individual user behavior of a vehicle user can be taken into account in the energy management. As a result, the comfort of dynamic energy management for the vehicle user can be further improved.

The invention thus makes it possible to predict changing vehicle conditions with regard to the required electrical energy and also to predict and dynamically manage or make available the electrical power or electrical energy made available to the electrical consumers of the motor vehicle. This can be done individually depending on the situation and take into account the type or function of the electrical consumers of the motor vehicle, as well as an individual use of the motor vehicle and / or its electrical load by users of the motor vehicle. Thereby, an energy management for the motor vehicle can be provided, in which can be better avoided that the electrical system of the vehicle is overloaded.

The invention will be explained in more detail below with reference to the figures. In these show:

1 a schematic representation of a proposed method according to an exemplary embodiment of the invention;

2 a schematic representation of a proposed method according to another exemplary embodiment of the invention;

3 a schematic representation of a proposed method according to another exemplary embodiment of the invention;

4 a schematic representation of a proposed method according to another exemplary embodiment of the invention;

5 a schematic representation of a proposed system according to another exemplary embodiment of the invention; and

6 a schematic representation of a proposed motor vehicle according to another exemplary embodiment of the invention.

1 shows a schematic representation of a proposed method according to an exemplary embodiment of the invention.

It shows 1 a schematic representation of a method for a dynamic energy management in a motor vehicle 100 , In this case, the motor vehicle 100 an electrical energy source 110 and electrical consumers 120 on. The method comprises: determining 10 a maximum deliverable power Pmax of the electrical energy source 110 , Determine 20 a currently provided power PaktV the electrical energy source 110 to the electrical consumers 120 of the motor vehicle 100 , Prädiktieren 30 a vehicle situation occurring at a future time t 31 , Prädiktieren 40 a power PtV required for the electrical consumers at the future time t 120 of the motor vehicle 100 , based on the predicted 30 entering vehicle situation 31 , Determine 50 whether the electrical energy source 110 the power PtV required for the future time t can be based on the required power PtV, the currently provided power PaktV and the maximum deliverable power Pmax. And if the electrical energy source 110 the required power PtV can not give, the method further comprises: determining 51 a power deficiency Pdef of the electric power source 110 based on the required power PtV, the currently provided power PaktV and the maximum deliverable power Pmax. Determine 52 of disconnected power consumers 121 of the motor vehicle 100 in such a way that the power sum PtotV of the power consumers to be disconnected 121 is suitable for at least partially offsetting the power deficit Pdef. Switch off 53 the determined power consumers to be disconnected 121 , And deploy 54 the required power PtV.

2 shows a schematic representation of a proposed method according to another exemplary embodiment of the invention.

It shows 2 a schematic representation of a relative to the 1 advanced process. The previously for 1 That said, therefore also applies to 2 continued.

For the sake of clarity, the method of 1 in 2 been omitted.

2 shows the procedure 1 The method further comprises: determining 15 a maximum deliverable energy Emax of the electrical energy source 110 taking into account a not to be exceeded residual energy value Emin of the electrical energy source 110 , Determine 25 a currently available energy Eakt of the electrical energy source 120 , Prädiktieren 45 a required for a future period .DELTA.t energy EtV for the electrical loads 120 of the motor vehicle 100 based on the predicted incoming vehicle situation 31 , wherein the future period .DELTA.t begins at the future time t. Determine 55 whether the electrical energy source 110 the energy required for the future period .DELTA.t can give EtV, based on the required energy EtV and the currently available energy Eakt. And if the electrical energy source 110 the energy required for the future period .DELTA.t can not deliver EtV, the method further comprises: determining 56 an energy deficiency Edef of the electric power source 110 , based on the required energy EtV and the currently available energy Eakt. Determine 57 of disconnected energy consumers 122 of the motor vehicle 110 in such a way that the energy sum EtotV of the energy consumers to be switched off 122 is until the future time .DELTA.t to compensate for the energy deficit Edef at least partially. Switch off 58 the determined energy consumer to be disconnected 122 , And deploy 59 the required energy EtV at the future time t for the future period Δt.

3 shows a schematic representation of a proposed method according to another exemplary embodiment of the invention.

It shows 3 a schematic representation of a relative to the 2 advanced process. The previously for 1 and 2 That said, therefore also applies to 3 continued.

For the sake of clarity, the method of 1 and 2 in 3 been omitted.

3 shows the procedure 2 The method further comprises: determining 60 a number in the motor vehicle 100 persons. Determine 70 a user power consumption of each person, the determination 70 user power consumption based on those electrical consumers 120 which are assigned to the respective person. Provide 80 a user behavior group, having a first user behavior and a further user behavior, wherein each user behavior of the user behavior group has a power consumption range. Eingruppieren 90 of the persons according to their user behavior into the user behavior group. And this is the determination 57 of disconnected energy consumers 122 of the motor vehicle 100 , including the categories of persons in the user behavior group.

4 shows a schematic representation of a proposed method according to another exemplary embodiment of the invention.

It shows 4 a schematic representation of a relative to the 3 advanced process. The previously for 1 . 2 and 3 That said, therefore also applies to 4 continued.

For the sake of clarity, the method of 1 and 2 in 4 been omitted.

4 shows the procedure 3 The method further comprises: modifying 95 the energy PtV required for the future period Δt if the actual energy Eakt of the electrical energy source 110 from a specified target energy range EsollB of the electric power source 110 differs. The set nominal energy range EsollB is the electrical energy source 110 depending on technical parameters of the electrical energy source 110 , And this is done modifying 95 the energy required for the future period .DELTA.t such that at the end of the future period .DELTA.t the currently existing energy Eakt of the electrical energy source 110 is located within the Sollenergiebereiches EsollB.

5 shows a schematic representation of a proposed system according to another exemplary embodiment of the invention.

It shows 5 a schematic representation of a proposed system 200 for a dynamic energy management in a motor vehicle 100 , In this case, the motor vehicle 100 an electrical energy source 110 and electrical consumers 120 on. The system 200 indicates: A monitoring device 210 , for monitoring the performance of the electrical energy source 110 , Another monitoring device 220 , for power consumption monitoring of electrical consumers 120 , A control device 250 , for controlling the electrical consumers 120 , A predictive agent 230 , to predict 30 a vehicle situation occurring at a future time t 31 , And another predictive tool 240 , to predict 40 a power PtV required for the electrical consumers at the future time t 120 of the motor vehicle 100 , based on the predicted 30 entering vehicle situation 31 , And here's the system 200 adapted to carry out any method according to the invention.

6 shows a schematic representation of a proposed motor vehicle according to another exemplary embodiment of the invention.

It shows 5 a schematic representation of a proposed motor vehicle 100 wherein the motor vehicle is an electrical energy source 110 , electrical consumer 120 and a system according to the invention 200 having. And here's the system 200 adapted to carry out any method according to the invention.

The inventive idea can be summarized as follows. A method, a related system, and a motor vehicle are provided, which may make it possible to provide a decision system that dynamically selects the operating strategy of electrical energy and power management to be performed.

The goal is the dynamic assignment of the manipulated variables to a state situation which can take into account both the system state, the customer behavior, the predictive information for a system conditioning and the possibly necessary operational strategic interventions in a system error in a causally separate manner.

In addition, for the selection of the operating strategy, the corresponding states can be changed by means of an offset from the use by the occupants so that the control behavior of the operating strategy can be optimized. The granularity of the method depends essentially on the availability of information, that is, the sensors installed in the motor vehicle and the evaluability or interpretability of the corresponding sensor information.

LIST OF REFERENCE NUMBERS

10

Determining a maximum deliverable power of the electrical energy source

15

Determining a maximum deliverable energy of the electrical energy source

20

determine a currently provided power to the electrical consumers

25

determine a currently provided energy to the electrical consumers

30

predict a vehicle situation occurring at a future time

31

entering vehicle situation

40

Predicting a required for the future time performance for the electrical consumers

45

Predicting a required for the future period energy for the electrical consumers

50

determine whether the electrical energy source can deliver the power needed for the future time

51

determining a power deficiency of the electric power source

52

determine power consumers to be disconnected

53

switching off the determined power consumers to be disconnected

54

provide the required power

55

determine whether the electrical energy source can deliver the energy needed for the future period

56

determine an energy deficit of the electrical energy source

57

determine energy consumers to be shut down

58

switching off the determined disconnected energy consumers

59

provide the energy needed for the future period

60

Determining a number of people in the vehicle

70

determine a user's power consumption of each person

80

provide a user behavior group

90

group people according to their user behavior into the user behavior group

95

modify the energy needed for the future period

100

motor vehicle

110

electrical energy source

120

electrical consumer

121

to be disconnected power consumers

122

to be disconnected energy consumers

200

system

210

monitoring device

220

another monitoring device

230

prediction means

240

further predictive agent

250

control device

t

future time

.delta.t

future period

Pmax

maximum deliverable power of the electrical energy source

PaktV

currently provided power to the electrical consumers

PtV

required power for the electrical consumers

Pdef

Power deficit of the electrical energy source

PtotV

Power sum of the disconnected power consumers

Emax

maximum deliverable energy of the electrical energy source

Emin

not to be exceeded residual energy value of the electrical energy source

Saf

currently available energy of the electrical energy source

ETV

needed energy for the electrical consumers

edef

Energy deficit of the electrical energy source

EtotV

Energy sum of disconnected energy consumers

EsollB

Target energy range

Claims (12)

A method for a dynamic energy management in a motor vehicle ( 100 ), wherein the motor vehicle ( 100 ) an electrical energy source ( 110 ) and electrical consumers ( 120 ), the method comprising: - determining ( 10 ) of a maximum deliverable power (Pmax) of the electrical energy source ( 110 ), - determine ( 20 ) of a currently provided power (PaktV) of the electrical energy source ( 110 ) to the electrical consumers ( 120 ) of the motor vehicle ( 100 ), - predict ( 30 ) a vehicle situation occurring at a future time (t) ( 31 ), - predict ( 40 ) a power (PtV) required at the future time (t) for the electrical consumers ( 120 ) of the motor vehicle ( 100 ), based on the predicted ( 30 ) entering vehicle situation ( 31 ), - determine ( 50 ), whether the electrical energy source ( 110 ) can deliver the power (PtV) required for the future time (t) based on the predicted required power (PtV) currently being used provided power (PaktV) and the maximum deliverable power (Pmax), and - if the electrical energy source ( 110 ) can not deliver the power (PtV) required for the future time (t): - determine ( 51 ) a power deficiency (Pdef) of the electrical energy source ( 110 ), based on the required power (PtV), the currently provided power (PaktV) and the maximum deliverable power (Pmax), 52 ) of consumers to be disconnected ( 121 ) of the motor vehicle ( 100 ), such that the power sum (PtotV) of the power consumers to be disconnected ( 121 ) is suitable for at least partially compensating the power deficit (Pdef), 53 ) of the determined power consumers to be disconnected ( 121 ), and - provide ( 54 ) of the required power (PtV). The method of claim 1, the method further comprising: - determining ( 15 ) of a maximum deliverable energy (Emax) of the electrical energy source ( 110 ) taking into account a not to be exceeded residual energy value (Emin) of the electrical energy source ( 110 ), - determine ( 25 ) a currently existing energy (fact) of the electrical energy source ( 120 ), - predict ( 45 ) an energy (EtV) required for a future period (Δt) for the electrical consumers ( 120 ) of the motor vehicle ( 100 ), based on the predicted incoming vehicle situation ( 31 ), whereby the future period (Δt) begins with the future time (t), 55 ), whether the electrical energy source ( 110 ) can deliver the energy (EtV) required for the future period (Δt), based on the required energy (EtV) and the currently available energy (Eakt), and - if the electrical energy source ( 110 ) can not deliver the energy (EtV) required for the future period (Δt): - determine ( 56 ) an energy deficiency (Edef) of the electrical energy source ( 110 ), based on the required energy (EtV) and the currently available energy (Eakt), - determine ( 57 ) of energy consumers to be shut down ( 122 ) of the motor vehicle ( 110 ) such that the energy sum (EtotV) of the energy consumers to be switched off ( 122 ) is suitable for at least partially compensating the energy deficit (Edef) until it reaches the future point in time (Δt), 58 ) of the determined energy consumer ( 122 ), and - provide ( 59 ) of the required energy (EtV) for the future period (Δt). The method of claim 2, wherein said determining ( 57 ) of energy consumers to be shut down ( 122 ) of the motor vehicle ( 100 ), taking into account the identified future consumption consumers ( 121 ) he follows. The method according to any one of the preceding claims, wherein the determining ( 52 ) of consumers to be disconnected ( 121 ) is carried out in such a way that first briefly switchable consumer ( 120 ) as service consumers to be shut down ( 121 ) and if their power sum (PtotV) is not sufficient to compensate for the power deficit (Pdef), then only additional turn-off consumers ( 120 ) as service consumers to be shut down ( 121 ). The method according to any one of the preceding claims, the method further comprising: - determining ( 60 ) of a number in the motor vehicle ( 100 ), - determine ( 70 ) of a user power consumption of each person, the determination ( 70 ) of user power consumption based on those electrical consumers ( 120 ), which are each assigned to the corresponding person, - provide ( 80 ) of a user behavior group, having a first user behavior and a further user behavior, wherein each user behavior of the user behavior group has a power consumption area, - grouping ( 90 ) of the persons according to their user behavior into the user behavior group, and wherein the determining ( 57 ) of energy consumers to be shut down ( 122 ) of the motor vehicle ( 100 ), with the inclusion of the categories of persons in the user behavior group. The method according to any one of the preceding claims, wherein said predicting ( 30 ) the vehicle situation occurring at the future time (t) ( 31 ) is probabilistic, taking into account a relevance threshold, and predicting ( 40 ) the power required at the future time (t) (PtV) and / or the predicting ( 45 ) the energy (EtV) required for the future period (Δt) is probabilistic, taking into account the corresponding further relevance threshold. The method according to any of the preceding claims 2 to 6, further comprising: - modifying ( 95 ) the energy (EtV) required for the future period (Δt) if the currently available energy (Eakt) of the electrical energy source ( 110 ) of a fixed nominal energy range (EsollB) of the electrical energy source ( 110 ), where the specified nominal energy range (EsollB) of the electrical energy source ( 110 ) depends on technical parameters of the electrical energy source ( 110 ), and wherein the modifying ( 95 ) the energy (EtV) required for the future period (Δt) is such that at the end of the future period (Δt) the currently available energy (Eakt) of the electrical energy source ( 110 ) is located within the target energy range (EsollB). The method according to claim 7, wherein the set target energy range (EsollB) of the electrical energy source ( 110 ) furthermore takes into account a vehicle user request, in particular by means of a corresponding surcharge or discount on those nominal energy range (EsollB), which due to the technical parameters of the electrical energy source ( 110 ). A system ( 200 ) for a dynamic energy management in a motor vehicle ( 100 ), wherein the motor vehicle ( 100 ) an electrical energy source ( 110 ) and electrical consumers ( 120 ), the system ( 200 ) comprising: - a monitoring device ( 210 ), for monitoring the performance of the electrical energy source ( 110 ), - another monitoring device ( 220 ), for power consumption monitoring of the electrical consumers ( 120 ), - a control device ( 250 ), for controlling the electrical consumers ( 120 ), - a prediction means ( 230 ), to predict ( 30 ) a vehicle situation occurring at a future time (t) ( 31 ), and - another predictive 240 ), to predict ( 40 ) a power (PtV) required at the future time (t) for the electrical consumers ( 120 ) of the motor vehicle ( 100 ), based on the predicted ( 30 ) entering vehicle situation ( 31 ), and where the system ( 200 ) is adapted to carry out a method according to any one of the preceding claims. A motor vehicle ( 100 ), comprising an electrical energy source ( 110 ), electrical consumer ( 120 ) and a system ( 200 ) according to claim 9, wherein the system ( 200 ) is operable according to a method according to any one of claims 1 to 8. A computer program product for a system ( 200 ) according to claim 9, which is operable by a method according to any one of claims 1 to 8. A data carrier comprising a computer program product according to claim 11.

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