DE102019203519B4 - Method for supplying energy to consumers in an on-board network for a vehicle and on-board network for a vehicle - Google Patents

Abstract

A method for supplying energy to consumers (26, 28) of a vehicle electrical system (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 connected 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 based on the state of all consumers (26, 28) by means of the central processing unit (16) is realized, and the shutdown by means of the central Arithmetic unit (16) by a user-defined adjustable ePDU (18) (electronic power distribution unit) with attached programmable processor (20) takes place.

Description

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

Future vehicle electrical systems are not only becoming increasingly complex, but also have a large number of different consumers. With regard to safety and reliable functioning, various aspects must be taken into account or organized before and during an operating state. In addition, it is essential, especially in the case of concepts relating to partially or fully automated driving, that the safety-relevant functions have a higher priority in terms of their energy supply than less important functions. Currently, these challenges are often solved by means of decentralized energy management and an associated analysis of the current flows on the control units capable of doing so. In this case, a high level of communication effort within the vehicle with a resulting high level of complexity is accepted as a disadvantage, with not every control unit being able to measure its own current current value. In addition, this procedure results in different qualities of the current measurements. From the state of the art, the first solution approaches are to be regarded as known.

That's from the pamphlet DE 100 20 304 A1 an on-board network system to be taken as known. Such an on-board power supply system comprises at least one generator, an on-board power supply battery, electrical consumers and a circuit breaker, by means of which a generator and an on-board power supply battery can be separated from the rest of the on-board power supply, with the generator and the on-board power supply battery each being assigned a separate disconnect switch, with the two disconnectors being Generator and the on-board 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 electrical system for a vehicle includes at least one safety-relevant consumer, which is electrically connected to a primary system and a secondary system of the electrical system and can be supplied with energy redundantly by these two systems. The primary system and the secondary system for supplying energy to the safety-relevant consumer are decoupled from one another. In this case, a recuperation device is assigned to the secondary system and the energy stored in the recuperation device can be made available at least in part, depending on the situation, to supply energy to 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 being 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, 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 thereto, and a consumer connection. In addition, the power supply unit includes 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 to the first conductor on the input side and the at least one second fuse element being electrically coupled to the second conductor on the input side. The consumer connection each includes an interface with which the at least one first fuse element and the at least one second fuse element is electrically coupled on the output side, the respective interface being designed to be electrically coupled to a consumer to provide the first voltage or the second voltage. A power supply system is also disclosed.

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

EP 1 103 462 A1 discloses a method for supplying energy to loads in an on-board network for a vehicle and a corresponding on-board network. Electrical consumers are connected to an electrical energy supply source via an on-board power supply control unit. A sensor is assigned to the on-board power supply control unit, by means of which it is intended to monitor that a power provided by a generator is distributed in such a way that sufficient electrical power remains for a battery.

The invention is now based on the object of providing a method for supplying energy to loads in an on-board network for a vehicle and an on-board network for a vehicle, which has 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 loads in 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 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, depending on the situation, a respective shutdown of a respective consumer is implemented according to a prioritization evaluation step based on the state of all consumers by means of the central processing unit. The individual connecting lines can also be referred to as branches. Separate consumers can be operated accordingly 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). In this case, the central processing unit can decide centrally to what extent prioritized switching of the loads should or will be implemented. An exact power flow analysis can therefore be carried out using a central processing unit, so that improved energy management can be provided in a simple manner. The precise analysis of the respective energy flow does not require any decentralized energy management. A high communication effort within the vehicle with the resulting high level of complexity is also avoided in this way. Centralized knowledge of all consumer states is thus made possible in a simple manner and at low cost, 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, a reduction in the system complexity can be achieved in this way.

In a further preferred embodiment of the invention, provision is made for an on-board network to be 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 loads 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 can be implemented according to a prioritization evaluation step based on the state of all consumers by means of the central processing unit. The advantages mentioned above also apply to the presented on-board network for a vehicle, insofar as they can be transferred.

Further preferred configurations of the invention result from the remaining features mentioned in the subclaims.

So it is provided in a further preferred embodiment of the invention that the cent ral processing unit is a user-definable ePDU (ePDU = electronic power distribution unit = electronic power distribution unit) with attached programmable processor. The aforementioned advantages can thus be achieved even better.

Another preferred embodiment of the invention also provides for the respective measuring unit systems to be arranged outside of the central processing unit. The aforementioned advantages can thus be achieved even better.

Furthermore, in a further preferred embodiment of the invention, it is provided that the respective measuring unit systems have an identical structure. The aforementioned advantages 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 separately from the central processing unit. The aforementioned advantages can thus be achieved even better.

Another preferred embodiment of the invention also provides that the ePDU that can be set in a user-defined manner has at least one semiconductor security element. The aforementioned advantages can thus be achieved even better.

In addition, in a further preferred embodiment of the invention, it is provided that the respective measuring unit systems are coupled separately to the connected programmable processor with respective connecting lines. The aforementioned advantages can thus be achieved even better.

Another preferred embodiment of the invention also provides for the respective connecting lines, which separately couple the respective measuring unit systems to the connected programmable processor, to be isolated from one another. The aforementioned advantages 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 vehicle electrical system, the central processing unit is an ePDU with a connected processor. The aforementioned advantages also apply to this special design of the vehicle electrical system presented, insofar as they can be transferred.

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

• 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 associated drawings. Show it:

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

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

In this embodiment, the central processing unit includes an ePDU 18 that can be set in a user-defined manner with a connected programmable processor 20. The central processing unit 16 has a second connecting line 22 on the inside, from which further third connecting lines 24 lead centrally to the outside. These connecting lines 22, 24 can also be viewed together as a respective interface. In this case, these third connecting lines 24 are arranged in the area of the adjustable ePDU 18 and can each be coupled to consumers at their end pointing outwards. These consumers, which are divided into QM consumers 26 and ASI consumers 28, are correspondingly coupled to the central processing unit 16 via respective fourth connecting lines 30 and are thus also coupled to the electrical energy supply source 12 via this central processing unit 16. In addition, respective first diagnosis points 32 are shown on the respective fourth connecting lines 30 in this exemplary embodiment, which are connected to the processor 20 via respective fifth connecting lines 33 . These first diagnosis points 32 can also be referred to as diagnosis points for supply branches. A diagnosis point 32 is shown in greater detail in an enlargement. In this enlargement a is cropped Part of a third connecting line 24 and part of a fourth connecting line 30 can be seen. The diagnosis point 32 is replaced here by a measuring unit system 34. It is conceivable that all or at least one diagnosis point 32 is replaced or represented by such a measuring unit system 34. In other words, a central processing unit 16 is connected between the at least one electrical energy supply source 12 and the loads 26, 28, and at least one measuring unit system 34, for example, is arranged or connected between the central processing unit 16 and the respective loads 26, 28.

2 shows a flowchart 100 of a method for supplying energy to loads in an on-board electrical system. In a first step 110, at least one electrical energy supply source is coupled to loads 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 Depending on the situation, a respective switch-off of a respective consumer is implemented according to a prioritization evaluation step based on the state of all consumers by means of the central processing unit.

reference list

10

On-board network for a vehicle

12

power supply source

14

first connection line

16

central processing unit

18

ePDU (ePDU = electronic power distribution unit)

20

processor

22

second connection line

24

third connection line

26

QM consumer

28

ASI consumer

30

fourth connection line

32

first diagnostic point

33

fifth connection line

34

unit of measure system

100

flow chart

110

first step

120

second step

Claims (8)

A method for supplying energy to consumers (26, 28) of a vehicle electrical system (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 connected 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 based on the state of all consumers (26, 28) by means of the central processing unit (16) is realized, and the shutdown by means of zentra len computing unit (16) by a user-defined adjustable ePDU (18) (electronic power distribution unit) with connected programmable processor (20). procedure after claim 1 , 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 separately from the central processing unit (16). Procedure according to one of claims 2 until 4 wherein the customizable ePDU (18) includes at least one semiconductor fuse element. A method according to any one of the preceding claims, wherein the respective measurement unit systems (34) are separately coupled with respective connection lines to the connected programmable processor (20). procedure after claim 6 , wherein the respective connection lines, which the respective measuring unit systems (34) connected to the NEN programmable processor (20) couple separately, are provided isolated from each other. Vehicle electrical system (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) can be implemented according to a prioritization evaluation step based on the state of all consumers (26, 28) by means of the central processing unit (16), the central processing unit (16) an ePDU (18) (electronic power distribution unit) with attached m processor (20).

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