DE102019203519A1 - Method for supplying energy to consumers of an on-board network for a vehicle and on-board network for a vehicle - Google Patents

Abstract

The invention relates to a method for supplying energy to consumers (26, 28) of an on-board network (10) for a vehicle and to an on-board network (10) for a vehicle. A method for supplying energy to consumers (26, 28) of an on-board network (10) is provided for a vehicle. Such a method comprises the following steps: coupling at least one electrical energy supply source (12) to consumers (26, 28) in a vehicle, with a central processing unit (26, 28) between the at least one electrical energy supply source (12) and the consumers (26, 28). 16) is connected and between the central processing unit (16) and the respective consumers (26, 28) at least one measuring unit system (34) is arranged so that any states of a respective coupled consumer (26, 28) are diagnosed centrally and depending on the respective diagnosis depending on the situation, a respective shutdown of a respective consumer (26, 28) according to a prioritization evaluation step related to the state of all consumers (26, 28) is realized by means of the central processing unit (16).

Description

The invention relates to a method for supplying energy to consumers of an on-board network for a vehicle and to an on-board network for a vehicle.

Future vehicle electrical systems will not only be increasingly complex, they will also have a large number of different consumers. With regard to safety and reliable functionality, various aspects must be observed or organized before and during an operating state. In addition, especially with concepts in connection with partially or fully automated driving, it is essential that the safety-relevant functions have a higher priority than less important functions with regard to their energy supply. Currently, these challenges are often solved by means of a decentralized energy management and an associated analysis of the current flows on capable control devices. A high communication effort within the vehicle with the resulting high complexity is accepted as a disadvantage, with not every control device being able to measure its own current value. In addition, this procedure results in different qualities of the current measurements. Initial approaches to a solution are to be regarded as known from the prior art.

So is from the pamphlet DE 100 20 304 A1 an on-board network system can be seen as known. Such an on-board network system comprises at least one generator, an on-board network battery, electrical consumers and a disconnector, by means of which a generator and an on-board network battery can be separated from the rest of the on-board network, the generator and the on-board network battery each being assigned a separate disconnector Generator and the on-board network battery are each connected to the electrical consumers.

From the pamphlet DE 10 2006 010 713 B4 an on-board network for a vehicle and a method for supplying energy to a safety-relevant consumer of an on-board network can also be seen as known. The on-board network for a vehicle comprises at least one safety-relevant consumer that is electrically connected to a primary system and a secondary system of the on-board network and can be redundantly supplied with energy by these two systems. The primary system and the secondary system for supplying energy to the safety-relevant consumer are decoupled from one another. A recuperation device is assigned to the secondary system and the energy stored in the recuperation device can, depending on the situation, be made available at least partially for the energy supply of the safety-relevant consumer. A voltage converter, in particular a DC / DC converter and a diode, is provided for decoupling the primary system and the secondary system, the voltage converter being unidirectional and assigned to the secondary system. For the situation-dependent at least partial delivery of the energy stored in the recuperation device to the primary system, the latter is coupled to the secondary system by means of a bidirectional voltage converter, in particular a DC / DC converter.

From the pamphlet DE 10 2016 101 855 A1 a redundant switching system can also be seen as known. Such a redundant switching system for a vehicle electrical system with at least two electrical energy supplies of a consumer comprises a switching network which is formed from at least three switches, a first switch being arranged between a connection for a first energy supply and a common node, and a second switch between a Connection for a second power supply and the common node is arranged and a third switch is arranged between the common node and a connection for the consumer.

From the pamphlet DE 10 2016 103 829 A1 a power supply unit for a vehicle is disclosed. Such a power supply unit comprises an input connection with a first conductor for carrying a first voltage and a second conductor for carrying a second voltage. Furthermore, the energy supply unit comprises a voltage converter, which is electrically coupled to the first conductor and the second conductor in order to transmit electrical energy, and a consumer connection. In addition, the power supply unit comprises a power distributor with at least one first fuse element and at least one second fuse element, the at least one first fuse element being electrically coupled on the input side to the first conductor and the at least one second fuse element being electrically coupled on the input side to the second conductor. The consumer connection each comprises an interface with which the at least one first fuse element and the at least one second fuse element are electrically coupled on the output side, the respective interface being designed to be electrically coupled to a consumer for providing the first voltage or the second voltage. A power supply system is also disclosed.

From the pamphlet DE 10 2016 115 823 A1 is also a vehicle electrical system and a Motor vehicle with a motor vehicle electrical system as known. Such a motor vehicle electrical system comprises two main wiring harnesses arranged electrically parallel to one another, the main wiring harnesses being electrically short-circuited to one another in two separate areas and each having a connection for one of at least two vehicle electrical system power supplies. In the at least two main wiring harnesses, interrupting the respective main wiring harness, at least one motor vehicle on-board network switching network is arranged, the motor vehicle on-board network switching network having at least three switches, a first switch being arranged between a first main wiring harness connection and a common junction, a second switch between a second main wiring harness connection and the common one Node is arranged and a third switch is arranged between the common node and at least one consumer connection.

The invention is based on the object of providing a method for supplying energy to consumers of an on-board network for a vehicle and an on-board network for a vehicle which has an improved and user-defined energy management during use.

In a preferred embodiment of the invention, it is provided that a method for supplying energy to consumers of an on-board network for a vehicle is provided. Such a method comprises the following steps: coupling at least one electrical energy supply source to consumers in a vehicle, a central processing unit being connected between the at least one electrical energy supply source and the consumers and at least one measuring unit system being disposed between the central computing unit and the respective consumers, so that any states of a respective coupled consumer are diagnosed centrally and depending on the respective diagnosis, depending on the situation, a respective disconnection of a respective consumer according to a prioritization evaluation step based on the state of all consumers is implemented by means of the central processing unit. The individual connecting lines can also be referred to as branches. Separate consumers can be operated on the respective branches. Each of these branches has, for example, a measuring unit or a measuring unit system on the secondary side (consumer side). The central processing unit can decide centrally to what extent a prioritized switching of the consumer should or will be implemented. An exact power flow analysis can therefore be carried out by a central processing unit, so that improved energy management can be provided in a simple manner. The exact analysis of the respective energy flow does not require a decentralized energy management. A high communication effort within the vehicle with the resulting high complexity is thus also avoided. Central knowledge of all consumer states is thus made possible in a simple and cost-effective manner, so that a uniform switching strategy leads to improved energy management. A central, one-off implementation makes it possible to provide improved energy management accordingly. In addition, the system complexity can be reduced in this way.

In a further preferred embodiment of the invention it is provided that an on-board network is provided for a vehicle. Such an on-board network for a vehicle comprises at least one electrical energy supply source which is designed to supply consumers in the vehicle with energy. For this purpose, it is provided that a central processing unit is connected between the at least one electrical energy supply source and the consumers and at least one measuring unit system is arranged between the central processing unit and the respective consumers, so that any states of a respective coupled consumer can be diagnosed centrally and depending on the respective Diagnosis, depending on the situation, a respective shutdown of a respective consumer according to a prioritization evaluation step based on the state of all consumers can be implemented by means of the central processing unit. The advantages mentioned above also apply to the presented electrical system for a vehicle, insofar as they are transferable.

Further preferred embodiments of the invention result from the other features mentioned in the subclaims.

In a further preferred embodiment of the invention, it is provided that the central processing unit is a user-defined adjustable ePDU (ePDU = electronic power distribution unit) with a connected programmable processor. The advantages mentioned above can thus be achieved even better.

In a further preferred embodiment of the invention it is also provided that the respective measuring unit systems are arranged outside the central processing unit. The advantages mentioned above can thus be achieved even better.

Furthermore, a further preferred embodiment of the invention provides that the respective measuring unit systems have an identical Have structure. The advantages mentioned above can thus be achieved even better.

Furthermore, in a further preferred embodiment of the invention it is provided that a respective measuring unit system is operated spatially separated from the central processing unit. The advantages mentioned above can thus be achieved even better.

In a further preferred embodiment of the invention it is also provided that the user-defined adjustable ePDU has at least one semiconductor fuse element. The advantages mentioned above can thus be achieved even better.

In addition, a further preferred embodiment of the invention provides that the respective measuring unit systems are separately coupled to the connected programmable processor by respective connecting lines. The advantages mentioned above can thus be achieved even better.

In a further preferred embodiment of the invention it is also provided that the respective connecting lines, which separately couple the respective measuring unit systems with the connected programmable processor, are provided isolated from one another. The advantages mentioned above can thus be achieved even better.

Finally, in a further preferred embodiment of the invention, it is provided that, in a special embodiment of the on-board network for a vehicle, the central processing unit is an ePDU with a connected processor. The advantages mentioned above also apply, insofar as they can be transferred, to this special design of the vehicle electrical system presented.

The various embodiments of the invention mentioned in this application can be advantageously combined with one another, unless stated otherwise in the individual case.

• 1 eine schematische Schaltanordnung eines Bordnetzes für ein Fahrzeug und
• 2 ein Flussdiagramm eines Verfahrens zur Energieversorgung von Verbrauchern eines Bordnetzes.

The invention is explained below in exemplary embodiments with reference to the accompanying drawings. Show it:

• 1 a schematic circuit arrangement of an electrical system for a vehicle and
• 2 a flow diagram of a method for supplying energy to consumers of an on-board network.

1 shows a schematic circuit arrangement of an on-board network 10 for a vehicle. This electrical system 10 for a vehicle is thereby with an electrical power supply source 12 shown. This energy supply source 12 is via a first connection line 14th electrically with a central processing unit 16 coupled. The central processing unit 16 is designed to centrally diagnose any states of a respective coupled consumer and, depending on the respective diagnosis, to implement a respective shutdown of a respective consumer according to a prioritization evaluation step based on the state of all consumers by means of the central processing unit.

In this embodiment, the central processing unit includes a user-defined adjustable ePDU 18th with connected programmable processor 20th . The central processing unit 16 has a second connecting line on the inside 22nd on from which central respective further third connecting lines 24 lead away to the outside. These connecting lines 22nd , 24 can also be viewed together as a respective interface. These are the third connecting lines 24 in the area of the adjustable ePDU 18th arranged and can each be coupled to consumers at their outward-facing end. These consumers, which are in QM consumers 26th and ASI consumers 28 differ, are via respective fourth connecting lines 30th accordingly with the central processing unit 16 coupled and thus via this central processing unit 16 also with the electrical power supply source 12 coupled. In addition, there are connecting lines on the respective fourth 30th in this exemplary embodiment respective first diagnosis points 32 shown, which via respective fifth connecting lines 33 with the processor 20th are connected. These first diagnostic points 32 can also be referred to as diagnostic points for supply branches. A diagnostic point 32 is shown in more detail in an enlargement. In this enlargement, a part of a third connecting line is cut off 24 and part of a fourth connecting line 30th to recognize. The diagnostic point 32 is here replaced by a measuring unit system 34 . It is conceivable that all or at least one diagnostic point 32 by such a measurement unit system 34 are replaced or shown. In other words, there is between the at least one electrical energy supply source 12 and consumers 26th , 28 a central processing unit 16 switched and between the central processing unit 16 and the respective consumers 26th , 28 is for example at least one measuring unit system 34 arranged or switched.

2 shows a flow chart 100 a method for supplying energy to consumers in an on-board network. In a first step 110 will be at least one electric Energy supply source coupled with consumers in a vehicle. In a second step 120 a central processing unit is connected between the at least one electrical energy supply source and the consumers and at least one measuring unit system is arranged between the central processing unit and the respective consumers, so that any states of a respective coupled consumer are diagnosed centrally and, depending on the respective diagnosis, a respective shutdown of a respective consumer according to a prioritization evaluation step based on the state of all consumers is realized by means of the central processing unit.

List of reference symbols

10

On-board network for a vehicle

12

Power source

14th

first connection line

16

central processing unit

18th

ePDU (ePDU = electronic Power Distribution Unit)

20th

processor

22nd

second connection line

24

third connection line

26th

QM consumers

28

ASI consumers

30th

fourth connecting line

32

first diagnostic point

33

fifth connection line

34

Measuring unit system

100

flow chart

110

first step

120

second step

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 10020304 A1 [0003]
• DE 102006010713 B4 [0004]
• DE 102016101855 A1 [0005]
• DE 102016103829 A1 [0006]
• DE 102016115823 A1 [0007]

Claims (10)

A method for supplying energy to consumers (26, 28) of an on-board network (10) for a vehicle, comprising the following steps: • coupling at least one electrical energy supply source (12) to consumers (26, 28) in a vehicle, characterized in that • between a central processing unit (16) is connected to the at least one electrical energy supply source (12) and the consumers (26, 28) and at least one measuring unit system (34) is arranged between the central processing unit (16) and the respective consumers (26, 28), so that any states of a respective coupled consumer (26, 28) are diagnosed centrally and, depending on the respective diagnosis, a respective disconnection of a respective consumer (26, 28) according to a prioritization evaluation step based on the state of all consumers (26, 28) by means of the central processing unit (16) is realized. Procedure according to Claim 1 , wherein the central processing unit (16) is a user-defined adjustable ePDU (18) with a connected programmable processor (20). Method according to one of the preceding claims, wherein the respective measuring unit systems (34) are arranged outside the central processing unit (16). Method according to one of the preceding claims, wherein the respective measuring unit systems (34) have an identical structure. Method according to one of the preceding claims, wherein a respective measuring unit system (34) is operated spatially separated from the central processing unit (16). Method according to one of the Claims 2 to 5 , wherein the user-defined adjustable ePDU (18) has at least one semiconductor fuse element. Method according to one of the preceding claims, wherein the respective measuring unit systems (34) are separately coupled to the connected programmable processor (20) by respective connecting lines. Procedure according to Claim 7 wherein the respective connecting lines, which separately couple the respective measuring unit systems (34) with the connected programmable processor (20), are provided isolated from one another. On-board network (10) for a vehicle, comprising at least one electrical energy supply source (12) which is designed to supply consumers in the vehicle with energy, characterized in that between the at least one electrical energy supply source (12) and the consumers (26, 28 ) a central processing unit (16) is connected and at least one measuring unit system (34) is arranged between the central processing unit (16) and the respective consumers (26, 28) so that any states of a respective coupled consumer (26, 28) can be diagnosed centrally and depending on the respective diagnosis, depending on the situation, a respective shutdown of a respective consumer (26, 28) according to a prioritization evaluation step based on the state of all consumers (26, 28) can be implemented by means of the central processing unit (16). On-board network (10) for a vehicle Claim 9 , wherein the central processing unit (16) is an ePDU (18) with a connected processor (20).

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