DE4437876A1 - Method for operating the electrical power supply in an electric vehicle - Google Patents

Method for operating the electrical power supply in an electric vehicle

Info

Publication number
DE4437876A1
DE4437876A1 DE4437876A DE4437876A DE4437876A1 DE 4437876 A1 DE4437876 A1 DE 4437876A1 DE 4437876 A DE4437876 A DE 4437876A DE 4437876 A DE4437876 A DE 4437876A DE 4437876 A1 DE4437876 A1 DE 4437876A1
Authority
DE
Germany
Prior art keywords
battery
power supply
operating
electrical power
electric vehicle
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
Application number
DE4437876A
Other languages
German (de)
Inventor
Adolf Dr Kalberlah
Thomas Dipl Ing Ruchatz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Volkswagen AG
Original Assignee
Volkswagen AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Volkswagen AG filed Critical Volkswagen AG
Priority to DE4437876A priority Critical patent/DE4437876A1/en
Publication of DE4437876A1 publication Critical patent/DE4437876A1/en
Ceased legal-status Critical Current

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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0024—Parallel/serial switching of connection of batteries to charge or load circuit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40—The network being an on-board power network, i.e. within a vehicle
    • H02J2310/46—The network being an on-board power network, i.e. within a vehicle for ICE-powered road vehicles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P2201/00—Indexing scheme relating to controlling arrangements characterised by the converter used
    • H02P2201/07—DC-DC step-up or step-down converter inserted between the power supply and the inverter supplying the motor, e.g. to control voltage source fluctuations, to vary the motor speed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

A method for operating the electrical power supply in an electric vehicle which has a first battery for the electric drive of the vehicle and a second battery which can be charged via a DC/DC transformer and has the purpose of feeding other loads in the vehicle. In order to ensure a high degree of efficiency of the transformer, the DC/DC transformer is only activated if the load requirement made of it has reached a prescribed minimum value which is favourable for the degree of efficiency.

Description

Die Erfindung betrifft ein Verfahren gemäß dem Oberbegriff des Patentanspruchs 1. Bei Stromversorgungen dieser Art erfolgt über als Pulsrichter mit geregeltem Taktverhältnis ausgeführte DC/DC-Wandler durch die dem elektrischen Fahrzeugantrieb zuge­ ordnete erste Batterie, die für eine höhere Ausgangsspannung ausgelegt ist, die Aufladung der für eine niedrigere Spannung ausgelegten zweiten Batterie, die ihrerseits zur Speisung ent­ sprechender Stromverbraucher im Fahrzeug, wie Belüftungseinrich­ tungen und Innenraumbeleuchtung, dient.The invention relates to a method according to the preamble of Claim 1. For power supplies of this type via a pulse judge with a regulated clock ratio DC / DC converter due to the electric vehicle drive arranged first battery for a higher output voltage is designed to charge for a lower voltage designed second battery, which in turn ent for feeding speaking electricity consumers in the vehicle, such as ventilation equipment and interior lighting.

Der Erfindung liegt die Aufgabe zugrunde, ein gattungsgemäßes Verfahren zu schaffen, das mit hohem Wirkungsgrad arbeitet.The invention has for its object a generic To create processes that work with high efficiency.

Die erfindungsgemäße Lösung dieser Aufgabe besteht in den kenn­ zeichnenden Merkmalen des Hauptanspruchs, eine vorteilhafte Aus­ gestaltung des Verfahrens beschreibt der Unteranspruch.The inventive solution to this problem consists in the characterizing features of the main claim, an advantageous The subclaim describes the design of the method.

Die Erfindung berücksichtigt in vorteilhafter Weise die Tat­ sache, daß bei vorgegebener Eingangsspannung der Wirkungsgrad von DC/DC-Wandlern bei niedriger Belastung derselben sehr schlecht ist und mit zunehmender Last bis zu einem Maximalwert ansteigt. Dem trägt die Erfindung dadurch Rechnung, daß sie - ggf. unter Inkaufnahme einer recht weitgehenden Entladung der zweiten Batterie durch die an sie angeschlossenen Verbraucher - den DC/DC-Wandler erst dann aktiviert, wenn die Lastanforderung an ihn einen Betrieb desselben mit vernünftigem Wirkungsgrad sicherstellt.The invention takes into account the fact in an advantageous manner thing that with a given input voltage the efficiency of DC / DC converters at very low loads is bad and with increasing load up to a maximum value increases. The invention takes this into account by - if necessary with a fairly extensive discharge of the  second battery by the consumers connected to it - the DC / DC converter only activated when the load request to him an operation of the same with reasonable efficiency ensures.

Es gibt Fälle, in denen nicht sämtliche Verbraucher im Fahrzeug durch die zweite Batterie gespeist werden können, da zu ihrem Betrieb eine Spannung erforderlich ist, die höher als die Nenn­ spannung der zweiten Batterie ist. Gegebenenfalls kann dies für die Außenleuchten des Fahrzeugs gelten, die beispielsweise mit 13,8 V betrieben werden müssen, während die zweite Batterie nur für 12 V ausgelegt ist. In einem solchen Fall müssen diese Ver­ braucher von der ersten Batterie her über die DC/DC-Wandler mit elektrischer Energie versorgt werden. Das wiederum bedeutet, daß gemäß Patentanspruch 2 in dem definierten Minimalwert der Last, bei dem der DC/DC-Wandler aktiviert wird, die Lastanforderungen derartiger Verbraucher mit berücksichtigt sind. Wenn diese Ver­ braucher also beispielsweise eine Leistung von etwa 250 Watt er­ fordern, wird man den definierten Minimalwert auf etwa 200 Watt legen.There are cases where not all consumers are in the vehicle can be powered by the second battery, since to their Operation requires a voltage that is higher than the nominal voltage of the second battery. This may apply to the exterior lights of the vehicle apply, for example with 13.8 V need to be operated while the second battery only is designed for 12 V. In such a case, these ver from the first battery via the DC / DC converter electrical energy are supplied. This in turn means that according to claim 2 in the defined minimum value of the load, where the DC / DC converter is activated, the load requirements such consumers are also taken into account. If this ver need a power of around 250 watts, for example demand, the defined minimum value will be around 200 watts lay.

Mit der Erfindung ist demgemäß ein gattungsgemäßes Verfahren geschaffen, das einen gerade bei fahrzeugautarken Stromversor­ gungen wichtigen hohen Wirkungsgrad sicherstellt.Accordingly, the invention is a generic method created the one with a self-sufficient power supply important high efficiency.

Claims (2)

1. Verfahren zum Betreiben der elektrischen Stromversorgung in einem Elektrofahrzeug, die eine erste Batterie für den elek­ trischen Fahrzeugantrieb und eine über einen DC/DC-Wandler aufladbare zweite Batterie zur Speisung von mit einer nie­ drigeren Spannung als der Fahrzeugantrieb betriebenen Ver­ brauchern im Fahrzeug enthält, dadurch gekennzeichnet, daß eine Aktivierung des DC/DC-Wandlers erst dann erfolgt, wenn die Lastanforderung an ihn einen Minimalwert überschreitet, der sich bei eine Aufladung erforderndem Ladezustand der zweiten Batterie einstellt.1. A method for operating the electrical power supply in an electric vehicle, which contains a first battery for the elec trical vehicle drive and a rechargeable via a DC / DC converter second battery for supplying consumers with a voltage that is never less than that of the vehicle drive , characterized in that the DC / DC converter is only activated when the load requirement on it exceeds a minimum value which arises when the state of charge of the second battery requires charging. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß im Minimalwert ferner die momentanen Lastanforderungen von Ver­ brauchern berücksichtigt werden, die mit einer gegenüber der Nennspannung der zweiten Batterie höheren Spannung über den DC/DC-Wandler betrieben werden.2. The method according to claim 1, characterized in that in Minimum value also the current load requirements of Ver users who are compared with the Nominal voltage of the second battery is higher than the voltage DC / DC converters can be operated.
DE4437876A 1993-10-30 1994-10-22 Method for operating the electrical power supply in an electric vehicle Ceased DE4437876A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4437876A DE4437876A1 (en) 1993-10-30 1994-10-22 Method for operating the electrical power supply in an electric vehicle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4337165 1993-10-30
DE4437876A DE4437876A1 (en) 1993-10-30 1994-10-22 Method for operating the electrical power supply in an electric vehicle

Publications (1)

Publication Number Publication Date
DE4437876A1 true DE4437876A1 (en) 1995-05-04

Family

ID=6501469

Family Applications (1)

Application Number Title Priority Date Filing Date
DE4437876A Ceased DE4437876A1 (en) 1993-10-30 1994-10-22 Method for operating the electrical power supply in an electric vehicle

Country Status (1)

Country Link
DE (1) DE4437876A1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19749548A1 (en) * 1996-11-20 1998-10-08 Volkswagen Ag Method for operating hybrid vehicle
DE29823179U1 (en) * 1998-12-29 2000-05-11 Schunk Motorensysteme GmbH, 27777 Ganderkesee Arrangement in a control circuit for controlling a motor of an auxiliary drive in a vehicle
EP1174304A1 (en) * 2000-07-19 2002-01-23 Peugeot Citroen Automobiles SA Electronic torque transmission device without power battery
WO2006112510A1 (en) * 2005-04-15 2006-10-26 Toyota Jidosha Kabushiki Kaisha Power supply device, control method of power supply device, and motor vehicle equipped with power supply device
WO2012084131A2 (en) 2010-12-23 2012-06-28 Volkswagen Aktiengesellschaft Method and device for charging a low-voltage battery in an electric drive system
DE102011012316A1 (en) 2010-12-23 2012-06-28 Volkswagen Ag Method and device for charging a low-voltage battery in an electric drive system
CN103029593A (en) * 2012-11-05 2013-04-10 荣成华泰汽车有限公司 Power supply control method and device and power supply device of electric automobile power system
DE10118177B4 (en) * 2000-04-13 2015-12-03 Yazaki Corporation Power supply device for vehicles
DE102014210283A1 (en) * 2014-05-30 2015-12-03 Robert Bosch Gmbh Method for operating a vehicle electrical system and vehicle electrical system
DE102015106335A1 (en) 2015-04-24 2016-10-27 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Method for operating a DC-DC converter

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19749548A1 (en) * 1996-11-20 1998-10-08 Volkswagen Ag Method for operating hybrid vehicle
DE19749548B4 (en) * 1996-11-20 2008-01-10 Volkswagen Ag Operation of a motor vehicle
DE29823179U1 (en) * 1998-12-29 2000-05-11 Schunk Motorensysteme GmbH, 27777 Ganderkesee Arrangement in a control circuit for controlling a motor of an auxiliary drive in a vehicle
DE10118177B4 (en) * 2000-04-13 2015-12-03 Yazaki Corporation Power supply device for vehicles
EP1174304A1 (en) * 2000-07-19 2002-01-23 Peugeot Citroen Automobiles SA Electronic torque transmission device without power battery
FR2811944A1 (en) * 2000-07-19 2002-01-25 Peugeot Citroen Automobiles Sa ELECTRONIC TORQUE TRANSMISSION DEVICE WITHOUT POWER BATTERY
WO2006112510A1 (en) * 2005-04-15 2006-10-26 Toyota Jidosha Kabushiki Kaisha Power supply device, control method of power supply device, and motor vehicle equipped with power supply device
US7839116B2 (en) 2005-04-15 2010-11-23 Toyota Jidosha Kabushiki Kaisha Power supply device, control method of power supply device, and motor vehicle equipped with power supply device
DE102011012316A1 (en) 2010-12-23 2012-06-28 Volkswagen Ag Method and device for charging a low-voltage battery in an electric drive system
WO2012084131A2 (en) 2010-12-23 2012-06-28 Volkswagen Aktiengesellschaft Method and device for charging a low-voltage battery in an electric drive system
DE102011012316B4 (en) 2010-12-23 2022-04-21 Volkswagen Ag Method and device for charging a low-voltage battery in an electric drive system
CN103029593A (en) * 2012-11-05 2013-04-10 荣成华泰汽车有限公司 Power supply control method and device and power supply device of electric automobile power system
CN103029593B (en) * 2012-11-05 2015-10-28 荣成华泰汽车有限公司 The method for controlling power supply of power system of electric automobile and device and electric supply installation
DE102014210283A1 (en) * 2014-05-30 2015-12-03 Robert Bosch Gmbh Method for operating a vehicle electrical system and vehicle electrical system
DE102015106335A1 (en) 2015-04-24 2016-10-27 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Method for operating a DC-DC converter
CN106067735A (en) * 2015-04-24 2016-11-02 保时捷股份公司 For the method running dc-dc
US10011179B2 (en) 2015-04-24 2018-07-03 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Method for operating a resonant DC-DC converter of a charger
CN106067735B (en) * 2015-04-24 2020-06-30 保时捷股份公司 Method for operating a DC-DC converter

Similar Documents

Publication Publication Date Title
DE3743317C2 (en)
DE69809833T2 (en) Device and method for power supply to electronic devices
EP0337155B1 (en) Power supply network for vehicle
DE2645507A1 (en) ELECTRIC POWER CONVERTER FOR ELECTRIC VEHICLES FUELED FROM AN ACCUMULATOR BATTERY
EP0593472A1 (en) Process and device for operating as on-board charging set the inverse rectifier of the threephase current drive of an electric car.
DE102010006125A1 (en) Charger i.e. direct current/direct current converter, for e.g. hybrid vehicle, has traction network-sided rectifier formed as inverter, where energy of traction battery is transferable via rectifier, transformer and onboard rectifier
DE10102243A1 (en) Device for generating and distributing electrical energy to consumers in a vehicle
DE2650851A1 (en) POWER SUPPLY DEVICE FOR A DUAL-VOLTAGE SYSTEM IN A MOTOR VEHICLE
DE102009052680A1 (en) Charging device for high voltage battery of e.g. electric vehicle, has step down converter arranged upstream of step up converter for lowering input direct voltage such that step down converter provides charging voltage for battery
DE102015203008A1 (en) Circuit arrangement for operating an electrical machine
DE10215822A1 (en) Converter system, method and converter
DE4437876A1 (en) Method for operating the electrical power supply in an electric vehicle
DE102017217729A1 (en) Energy supply device for providing electrical energy for at least one terminal and method for operating an energy supply device
DE69630231T2 (en) Supply unit for an electric vehicle
EP1082805B1 (en) Voltage switch-over device
DE3007941C2 (en)
DE102021100213A1 (en) System and method for managing the energy supply of a transport vehicle and the corresponding transport vehicle
DE19913115A1 (en) Isolation type DC-DC power conversion unit and electrical system for an electric vehicle
DE102019200875A1 (en) High-voltage battery unit for an electric vehicle
DE102013212692A1 (en) Energy storage device with DC power supply circuit
DE102019001196A1 (en) Method for providing a voltage for a vehicle electrical system and on-board charger for this purpose
DE102016209087A1 (en) harness
EP3759787B1 (en) Charging system
DE102021116525A1 (en) Device and method for the electrical supply of a low-voltage on-board network of a motor vehicle, in particular an electric motor vehicle
EP3888969A1 (en) Multiple charging device for charging multiple batteries

Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
8120 Willingness to grant licences paragraph 23
8131 Rejection