WO2023099151A1 - Verfahren zur steuerung eines bordnetzsystems für ein kraftfahrzeug, bordnetzsystem sowie kraftfahrzeug - Google Patents
Verfahren zur steuerung eines bordnetzsystems für ein kraftfahrzeug, bordnetzsystem sowie kraftfahrzeug Download PDFInfo
- Publication number
- WO2023099151A1 WO2023099151A1 PCT/EP2022/081477 EP2022081477W WO2023099151A1 WO 2023099151 A1 WO2023099151 A1 WO 2023099151A1 EP 2022081477 W EP2022081477 W EP 2022081477W WO 2023099151 A1 WO2023099151 A1 WO 2023099151A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- voltage
- motor vehicle
- energy
- low
- network
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
- B60L58/20—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having different nominal voltages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
- B60L58/14—Preventing excessive discharging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/16—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2210/00—Converter types
- B60L2210/10—DC to DC converters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/545—Temperature
Definitions
- the invention relates to an on-board power supply system for a motor vehicle, which has a high-voltage energy store for providing a high-voltage network for supplying power to one or more high-voltage consumers, a main converter for converting the high-voltage present in the high-voltage network to a predetermined one in the low-voltage network has existing low-voltage voltage for the power supply of one or more low-voltage consumers and a battery management system. Furthermore, the invention relates to a method for controlling such an onboard power supply system and a motor vehicle with such an onboard power supply system.
- Such vehicle electrical system systems are known and are usually part of electric or hybrid vehicles with a traction storage device that forms the high-voltage energy storage device (high-voltage voltage energy storage device) and a vehicle electrical system that forms the low-voltage voltage network and provides or supplies a low-voltage voltage, for example 12 V .is operated with a low-voltage voltage or low-voltage.
- a low-voltage vehicle electrical system battery is usually provided as the voltage source for the low-voltage network.
- the high-voltage energy store is also known to use as a voltage source for the low-voltage network when a motor vehicle is parked or idle.
- the high-voltage energy store will be deeply discharged in an impermissible manner and its performance will therefore be impaired.
- the object of the invention is to provide an on-board power supply system for a motor vehicle that provides a reliable power supply over a particularly long period of time when the motor vehicle is parked guaranteed.
- the object of the invention is also to provide a method for operating such a vehicle electrical system.
- the object is achieved by a method for controlling an onboard power supply system for a motor vehicle, which has a high-voltage energy store for providing a high-voltage network for the voltage supply of one or more high-voltage consumers, a main converter for converting the high-voltage voltage present in the high-voltage network has a predetermined low-voltage voltage present in the low-voltage network for the voltage supply of one or more low-voltage consumers, a battery management system and a bypass converter assembly.
- the bypass converter assembly is set up to introduce a predetermined amount of energy from the high-voltage network into the low-voltage network during a shutdown phase of the motor vehicle.
- the method comprises the following steps: a) cumulating the amount of energy that is introduced into the low-voltage network via the bypass converter assembly when the motor vehicle is switched off, and b) switching off the bypass converter assembly when the cumulative amount of energy exceeds a certain maximum permissible level Exceeds the amount of energy that may be removed from the high-voltage energy storage device in a parking phase of the motor vehicle.
- the parking phase of the motor vehicle is in particular a phase in which the motor vehicle is not being actively operated and is switched off or parked.
- This state can also be defined by the fact that the ignition of the motor vehicle has been deactivated, that a timer triggered when the ignition was deactivated has expired and/or that it is detected that the driver or the vehicle occupants have left the motor vehicle (and optionally still locked it) or have left the vehicle . have.
- the bypass converter assembly which is provided separately from the main converter, has the advantage that it can be specially tailored to bring electrical energy from the high-voltage network into the low-voltage network during the shutdown phase, in which the power requirement is significantly lower than in the active operation of the motor vehicle or while driving.
- the bypass converter assembly since the bypass converter assembly has optimum efficiency at a lower output than the main converter, the power supply to the low-voltage grid can be ensured much more efficiently and thus over a longer period of time than if the low-voltage grid were powered via the main converter during the shutdown phase would be taken care of.
- switching off the bypass converter assembly when the maximum permissible amount of energy is exceeded ensures that the high-voltage energy storage device is not discharged below a specified threshold, i.e. a specified threshold value, which protects the high-voltage energy storage device from an impermissible deep discharge when the motor vehicle is parked is.
- the maximum permissible amount of energy can be determined by the battery management system and transmitted to the bypass converter assembly before the battery management system is switched off when the motor vehicle is parked. In this way, the maximum permissible amount of energy can be reliably determined and the energy consumption in the shutdown phase can be reduced by switching off the battery management system.
- the maximum permissible amount of energy is determined by the battery management system based on the weakest cell of the high-voltage energy store in order to reliably rule out an impermissible deep discharge of the high-voltage energy store.
- the ambient temperature, the temperature of the high-voltage energy store and/or the cell aging of the cells of the high-voltage energy store can be taken into account when determining the maximum permissible amount of energy.
- the maximum permissible amount of energy can be selected to be particularly large and at the same time the risk of the high-voltage energy storage device being impaired in its performance by the removal of the maximum permissible amount of energy can be minimized.
- an on-board power supply system for a motor vehicle is also used to solve the above-mentioned problem, with a high-voltage network comprising a high-voltage energy store for the voltage supply of one or more high-voltage consumers, a main converter for converting the high-voltage voltage present in the high-voltage network to a predetermined low-voltage voltage present in the low-voltage network for the voltage supply of one or more low-voltage consumers, a battery management system and a bypass converter assembly.
- the bypass converter assembly is set up to enter a specific, maximum permissible amount of energy from the high-voltage network into the low-voltage network during a shutdown phase of the motor vehicle.
- the onboard power supply system is particularly energy-efficient thanks to the bypass converter assembly and thus ensures a reliable power supply to the low-voltage power supply system over a particularly long period of time in the shutdown phase.
- the high-voltage energy store is protected from an impermissible deep discharge, since the amount of energy that can be entered from the high-voltage network into the low-voltage network while the motor vehicle is parked is limited to a specified value.
- the main converter is in the form of a DC/DC converter with a maximum output of at least 1 kW in order not to significantly restrict the output of the motor vehicle during operation.
- bypass converter assembly can be designed as a DC/DC converter with a maximum power of 100 W, in particular a maximum of 50 W.
- the bypass converter assembly can be designed to be particularly energy-efficient in order to be able to operate the low-voltage network electrically using the maximum permissible amount of energy over a particularly long period of time in the shutdown phase.
- bypass converter assembly is structurally integrated into the high-voltage energy store or into a common housing and is therefore protected.
- a motor vehicle with an on-board power supply system according to the invention with the advantages mentioned above is also provided to solve the above-mentioned object.
- the motor vehicle has an electric drive motor for electric ferry operation, with the high-voltage Energy storage is set up to supply energy to the electric drive machine.
- FIG. 1 A motor vehicle 10 with an on-board power supply system 20 is shown in FIG. 1
- the motor vehicle 10 has an electric drive machine 12 in the form of an electric motor, by means of which the motor vehicle 10 can be driven for the ferry operation.
- the motor vehicle 10 is an electric vehicle or a hybrid vehicle.
- the vehicle electrical system 20 (see Figure 2) has a high-voltage network 22 with a high-voltage energy store 24 and a battery management system 26 assigned to the high-voltage energy store 24, as well as a low-voltage network 28.
- the high-voltage energy store 24 forms a traction store of the motor vehicle 10, ie a store for the electrical energy required to drive the motor vehicle 10.
- the low-voltage network 28 can optionally have a low-voltage energy store 30, for example in the form of a low-voltage vehicle electrical system battery.
- the high-voltage network 22 is set up for the power supply of one or more high-voltage consumers with a high-voltage voltage, in particular with a high-voltage voltage of over 220 V, for example 400 V or 800 V. In the present exemplary embodiment, the high-voltage network 22 is set up for the voltage supply to the electric drive machine 12 .
- the low-voltage network 28 is set up to supply one or more low-voltage consumers with a low-voltage, in particular with a low-voltage of less than 150 V, for example 48 V, 24 V or 12 V.
- the high-voltage network 22 also has a main converter 32 which can be electrically coupled to the high-voltage energy store 24 or separated from it via a disconnector 34 .
- the main converter 32 is set up here to convert the high-voltage of the high-voltage network 22 into the low-voltage of the low-voltage network 28 in order to supply the low-voltage consumers of the low-voltage network 28 with the low-voltage.
- the main converter 32 is a DC/DC converter with a maximum power of 3 to 5 kW.
- the main converter 32 can be a DC/DC converter with a maximum power of at least 1 kW.
- the main converter 32 has an optimum efficiency at 1 kW.
- the high-voltage network 22 has a bypass converter assembly 36, which is electrically connected to the high-voltage energy store 24 and is set up to convert the high-voltage of the high-voltage network 22 into the low-voltage of the low-voltage independently of the main converter 32 -To convert voltage network 28 in order to supply the low-voltage consumers of the low-voltage network 28 with the low-voltage voltage.
- the main converter 32 and the bypass converter assembly 36 are connected in parallel.
- the bypass converter assembly 36 is designed as a DC/DC converter with a maximum power of 100 W. In an alternative embodiment, the bypass converter assembly 36 is designed as a DC/DC converter with a maximum power of 50 W.
- bypass converter assembly 36 has an optimum efficiency of 1 to 2 W.
- bypass converter assembly 36 and the high-voltage energy store 24 are housed in a housing 38 together with the battery management system 26 and the main converter 32 .
- bypass converter assembly 36 is integrated into the housing 38 or the high-voltage energy store 24 .
- the high-voltage energy store 24 and the bypass converter assembly 36 are connected to the battery management system 26 in a signal-transmitting manner.
- the low-voltage network 28 is connected via the bypass converter assembly 36 as described below supplied with low voltage.
- battery management system 26 determines a maximum permissible amount of energy that may be drawn from high-voltage energy store 24 in order to introduce it into low-voltage network 28 during the shutdown phase.
- the battery management system 26 determines the maximum permissible amount of energy based on the weakest cell of the high-voltage energy store 24, for example by multiplying the number of cells in the high-voltage energy store 24 by the amount of energy that can be drawn from the weakest cell of the high-voltage energy store 24 without converting them into a critical state, i.e. a state in which the cell or the high-voltage energy store 24 is deeply discharged or which would permanently impair the performance of the high-voltage energy store 24.
- the battery management system 26 takes into account the ambient temperature when determining the maximum permissible amount of energy of the high-voltage energy store 24 and/or the cell aging of the cells of the high-voltage energy store 24, for example by multiplying the amount of energy available by a corresponding factor that is stored in a memory of the battery management system 26 for this purpose.
- the battery management system 26 transmits the determined maximum permissible amount of energy to the bypass converter assembly 36.
- the battery management system 26 is then switched off in order to reduce the energy consumption in the parking phase.
- the isolating switch 34 is opened and the main converter 32 is thus electrically isolated from the high-voltage energy store 24 . From this point in time, the low-voltage network 28 is supplied with voltage by the high-voltage energy store 24 exclusively via the bypass converter assembly 36.
- the bypass converter assembly 36 is set up to add up the amount of energy that is introduced into the low-voltage network 28 via the bypass converter assembly 36 in the shutdown phase and to switch off as soon as the maximum permissible amount of energy is exceeded in order to further energy removal from the high-voltage energy storage device 24 to prevent.
- low-voltage network 28 can be supplied with voltage by means of high-voltage energy store 24 without endangering high-voltage energy store 24 in the process.
- the low-voltage network 28 is supplied with voltage via the bypass converter assembly 36 in a particularly energy-efficient manner.
- bypass converter assembly 36 works independently of the battery management system 26, so that the battery management system 26 can be switched off in the shutdown phase. This has the advantage that a particularly long energy supply can be ensured in the shutdown phase, in particular of at least 6 weeks.
- the low-voltage energy store 30 can be designed to be particularly small or can be omitted entirely.
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US18/714,560 US20250135947A1 (en) | 2021-12-01 | 2022-11-10 | Method for Controlling an On-Board Power Supply System for a Motor Vehicle, On-Board Power Supply System and Motor Vehicle |
| CN202280077716.4A CN118317885A (zh) | 2021-12-01 | 2022-11-10 | 用于控制用于机动车的车载电网系统的方法、车载电网系统以及机动车 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021131608.1A DE102021131608A1 (de) | 2021-12-01 | 2021-12-01 | Verfahren zur Steuerung eines Bordnetzsystems für ein Kraftfahrzeug, Bordnetzsystem sowie Kraftfahrzeug |
| DE102021131608.1 | 2021-12-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023099151A1 true WO2023099151A1 (de) | 2023-06-08 |
Family
ID=84370167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2022/081477 Ceased WO2023099151A1 (de) | 2021-12-01 | 2022-11-10 | Verfahren zur steuerung eines bordnetzsystems für ein kraftfahrzeug, bordnetzsystem sowie kraftfahrzeug |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20250135947A1 (de) |
| CN (1) | CN118317885A (de) |
| DE (1) | DE102021131608A1 (de) |
| WO (1) | WO2023099151A1 (de) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011011798A1 (de) * | 2011-02-19 | 2012-08-23 | Volkswagen Ag | Verfahren zum Betreiben eines Energiespeichers für ein Fahrzeug sowie entsprechender Energiespeicher, Spannungsversorgung und Fahrzeug |
| EP3067240A1 (de) * | 2015-03-13 | 2016-09-14 | MAN Truck & Bus AG | Verfahren zur spannungsversorgung eines bordnetzes eines kraftfahrzeugs |
| US20190275968A1 (en) * | 2018-03-06 | 2019-09-12 | Hyundai Motor Company | Power supply system of vehicle and method of controlling the same |
| US20200384891A1 (en) * | 2017-12-04 | 2020-12-10 | Audi Ag | Method for controlling an electrical system of an electrically drivable motor vehicle having a plurality of batteries, and electrical system of an electrically drivable motor vehicle having a plurality of batteries |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007001673A1 (de) | 2007-01-11 | 2008-07-17 | Bayerische Motoren Werke Aktiengesellschaft | Bordnetzsystem für ein Kraftfahrzeug |
| DE102012011840B4 (de) | 2012-06-14 | 2023-03-09 | Audi Ag | Bordnetz für ein Kraftfahrzeug |
| DE102013225097B4 (de) | 2013-12-06 | 2020-10-29 | Volkswagen Aktiengesellschaft | Energiemanagementverfahren zum Betreiben eines elektrischen Bordnetzes eines Kraftfahrzeuges und Kraftfahrzeug |
| DE102017128314A1 (de) | 2017-11-29 | 2019-05-29 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Verfahren zum Temperieren einer Batterie und Batterie mit einer entsprechenden Temperierfunktion |
| DE102019126706A1 (de) | 2019-10-02 | 2021-04-08 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zum Betreiben eines Kraftfahrzeugs, insbesondere eines Kraftwagens, sowie Kraftfahrzeug, insbesondere Kraftwagen |
| US11021073B1 (en) | 2020-02-26 | 2021-06-01 | Atieva, Inc. | Electric vehicle power supply system to minimize loss during vehicle rest |
-
2021
- 2021-12-01 DE DE102021131608.1A patent/DE102021131608A1/de active Pending
-
2022
- 2022-11-10 WO PCT/EP2022/081477 patent/WO2023099151A1/de not_active Ceased
- 2022-11-10 US US18/714,560 patent/US20250135947A1/en active Pending
- 2022-11-10 CN CN202280077716.4A patent/CN118317885A/zh active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011011798A1 (de) * | 2011-02-19 | 2012-08-23 | Volkswagen Ag | Verfahren zum Betreiben eines Energiespeichers für ein Fahrzeug sowie entsprechender Energiespeicher, Spannungsversorgung und Fahrzeug |
| EP3067240A1 (de) * | 2015-03-13 | 2016-09-14 | MAN Truck & Bus AG | Verfahren zur spannungsversorgung eines bordnetzes eines kraftfahrzeugs |
| US20200384891A1 (en) * | 2017-12-04 | 2020-12-10 | Audi Ag | Method for controlling an electrical system of an electrically drivable motor vehicle having a plurality of batteries, and electrical system of an electrically drivable motor vehicle having a plurality of batteries |
| US20190275968A1 (en) * | 2018-03-06 | 2019-09-12 | Hyundai Motor Company | Power supply system of vehicle and method of controlling the same |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021131608A1 (de) | 2023-06-01 |
| US20250135947A1 (en) | 2025-05-01 |
| CN118317885A (zh) | 2024-07-09 |
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