[go: up one dir, main page]

SE537877C2 - Dual battery system for motor vehicles and method of voltage regulation of such - Google Patents

Dual battery system for motor vehicles and method of voltage regulation of such Download PDF

Info

Publication number
SE537877C2
SE537877C2 SE1351493A SE1351493A SE537877C2 SE 537877 C2 SE537877 C2 SE 537877C2 SE 1351493 A SE1351493 A SE 1351493A SE 1351493 A SE1351493 A SE 1351493A SE 537877 C2 SE537877 C2 SE 537877C2
Authority
SE
Sweden
Prior art keywords
battery
starter
current
starter battery
designed
Prior art date
Application number
SE1351493A
Other languages
Swedish (sv)
Other versions
SE1351493A1 (en
Inventor
Gunnar Ledfelt
Ninos Poli
Original Assignee
Scania Cv Ab
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 Scania Cv Ab filed Critical Scania Cv Ab
Priority to SE1351493A priority Critical patent/SE537877C2/en
Priority to EP14870037.0A priority patent/EP3080893A4/en
Priority to PCT/SE2014/051442 priority patent/WO2015088425A1/en
Publication of SE1351493A1 publication Critical patent/SE1351493A1/en
Publication of SE537877C2 publication Critical patent/SE537877C2/en

Links

Classifications

    • 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
    • H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
    • H02J7/1423—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle with multiple batteries
    • 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
    • B60R16/033—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 characterised by the use of electrical cells or batteries
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/0862—Circuits or control means specially adapted for starting of engines characterised by the electrical power supply means, e.g. battery
    • F02N11/0866—Circuits or control means specially adapted for starting of engines characterised by the electrical power supply means, e.g. battery comprising several power sources, e.g. battery and capacitor or two 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • H02J7/0032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits disconnection of loads if battery is not under charge, e.g. in vehicle if engine is not running
    • 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
    • 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)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

Sammandrag Ett elektriskt system i ett motorfordon (1) innefattar ett kraftbatteri (2), ett darmed parallellkopplat startbatteri (3), en generator (7) samt fOrbrukare av elektrisk energi innefattande en startmotor (8) anslutna mellan motsatta poler (4, 5) has kraftbatteriet. En brytare (10) är anordnad mellan kraftbatteriets ena pol (4) och startbatteriet (3). En inrattning (11) är utformad att styra brytaren att slutas vid aktivering av startmotorn (8). Medel (12) är ut10 formade att mata strOmmen igenom brytaren, och inrattningen är utformad att efter avslutad motorstartprocedur styra brytaren (10) att oppna sa snart ett villkor som star i samband med en viss grad av urladdningen av startbatteriet skett efter avslutandet av motorstartproceduren är uppfyllt. Summary An electrical system in a motor vehicle (1) comprises a power battery (2), a starter battery (3) connected in parallel, a generator (7) and consumers of electrical energy comprising a starter motor (8) connected between opposite poles (4, 5) has the power battery. A switch (10) is arranged between one pole (4) of the power battery and the starting battery (3). A device (11) is designed to control the switch to close when activating the starter motor (8). Means (12) are designed to supply the current through the switch, and the device is designed to control the switch (10) to open as soon as a condition which is associated with a certain degree of discharge of the starting battery has taken place after the end of the motor start procedure. fulfilled.

Description

DUBBELBATTERISYSTEM FOR MOTORFORDON SAMT FORFARANDE FOR SPANNINGSREGLERING HOS ETT SADANT UPPFINNINGENS OMRADE FOreliggande uppfinning avser ett elektriskt system utformat att vara anordnat i ett motorfordon och innefattande: ett kraftbatteri, ett med kraftbatteriet parallellkopplat startbatteri, - en generator samt forbrukare av elektrisk energi innefat- tande en startmotor anslutna mellan motsatta poler hos kraftbatteriet pa en forbrukarsida darav motsatt kraftbatteriets sida fOr anslutning till startbatteriet, en brytare anordnad mellan kraftbatteriets ena pol och start- batteriet for att mOjliggOra frankoppling av startbatteriet fran namnda fOrbrukarsida och att vara Open for sadan frankoppling nar motorfordonets motor är avstangd, och en inrattning utformad for styrning av brytaren och att styra brytaren att slutas vid aktivering av startmotorn for start av fordonets motor fOr att tillhandahalla en strOmvag mellan startbatteriet och kraftbatteriets fOrbrukarsida, och darmed strOm till startmotorn, samt ett forfarande for spanningsreglering hos ett elektriskt system enligt ingressen hos bifogade sjalvstandiga forfarandepatentkrav. THE FIELD OF THE INVENTION connected between opposite poles of the power battery on a consumer side thereof opposite the power battery side for connection to the starter battery, a switch arranged between one power battery and the starter battery to enable disconnection of the starter battery from said consumer side and to be open when the motor is disconnected. , and a device designed to control the switch and to control the switch to close upon activation of the starter motor for starting the engine of the vehicle to provide a current path between the starter battery and the consumer side of the power battery, and thus power to the starter motor, and a procedure for voltage regulation of an electrical system according to the preamble of the appended independent procedure patent claims.

Darvid är uppfinningen inte last till nagon speciell typ av motorfordon, aven om uppfinningen är speciellt applicerbar pa hjulburna motorfordon, speciellt nyttofordon, sasom lastbilar och bussar, och av den anledningen nedan stundom kommer att dis- 1 kuteras i den anvandningen i for uppfinningen belysande men saledes ingalunda begransande syfte. In this case, the invention is not a load for any particular type of motor vehicle, although the invention is particularly applicable to wheeled motor vehicles, especially commercial vehicles, such as trucks and buses, and for that reason below will sometimes be discussed in that application in the invention illustrative. thus by no means limiting purpose.

Ett elektriskt system av denna typ benamns vanligtvis dubbelbat- terisystem genom att det uppvisar tva parallellkopplade batteri- pack, ett med som servicebatterier fungerande kraftbatterier och ett med startbatterier. Varje sadant batteripack skulle kunna uppvisa endast ett kraftbatteri respektive ett startbatteri, aven om de vanligtvis vart och ett uppvisar tva eller flera seriekopplade bat- terier, sasom vanligtvis tva seriekopplade 12 V-batterier hos lastbilar. Syftet med startbatterierna ar att tillforsakra att startmotorn far tillrackligt med kraft via strom fran startbatteriet fOr att starta motorfordonets forbranningsmotor Mien i de fall dá det elektriska systemets kraftbatterier ar helt urladdade. Av denna anledning ar det viktigt att uppratthalla ett hogt laddningstillstand hos startbatterierna oberoende av laddningstillstandet hos kraftbatterierna. Det ar av denna anledning som hos ett dylikt elektriskt system startbatteriet ar anordnat pa motsatt sida av kraftbatteriet mot generatorn och fordonets fOrbrukare av elektriskt energi samt en brytare ar anordnad mellan kraftbatteriets ena pol och startbatteriet. Harigenom kan startbatteriet frankopplas fran namnda fOrbrukarsida, dvs. resten av det elektriska systemet, i samband med att motorfordonets motor stangs av, och det kan sedan anslutas till det elektriska systemet i samband med efter- fOljande start. Da vid sadan start startbatteriet delvis laddas ur ar det aven viktigt att se till att startbatteriet aterfar laddning, vilket kan ske genom att det halls anslutet till namnda forbrukarsida och darmed generatorn for ateruppladdning via generatorn innan startbatteriet separeras fran resten av systemet genom Oppnande av namnda brytare. 2 BAKGRUNDSTEKNIK Ett elektriskt system av inledningsvis definierat slag ar tidigare kant genom exempelvis EP 1093974 B1. Denna skrift avhandlar huvudsakligen hur startbatteriet skall kunna aterladdas pa ett fordelaktigt satt baserat pa diverse parametrar hos det elektriska systemet. An electrical system of this type is usually called a double battery system in that it has two parallel-connected battery packs, one with power batteries acting as service batteries and one with starter batteries. Each such battery pack could have only one power battery and one starter battery, respectively, although they usually each have two or more series-connected batteries, as is usually the case with two series-connected 12 V batteries in trucks. The purpose of the starter batteries is to ensure that the starter motor is supplied with sufficient power via current from the starter battery to start the motor vehicle's internal combustion engine Mien in cases where the electrical system's power batteries are completely discharged. For this reason, it is important to maintain a high state of charge of the starter batteries regardless of the state of charge of the power batteries. It is for this reason that in such an electrical system the starter battery is arranged on the opposite side of the power battery towards the generator and the vehicle's consumer of electrical energy and a switch is arranged between one pole of the power battery and the starter battery. As a result, the starter battery can be disconnected from the said Consumer side, ie. the rest of the electrical system, in connection with the motor vehicle's engine being switched off, and it can then be connected to the electrical system in connection with the subsequent start. Since at such a start the starter battery is partially discharged, it is also important to ensure that the starter battery re-charges, which can be done by keeping it connected to the said consumer side and thus the generator for recharging via the generator before the starter battery is separated from the rest of the system. . 2 BACKGROUND ART An electrical system of initially defined kind is previously edge by, for example, EP 1093974 B1. This document mainly deals with how the starter battery can be recharged in an advantageous manner based on various parameters of the electrical system.

SAMMANFATTNING AV UPPFINNINGEN Syftet med foreliggande uppfinning ar att tillhandahalla ett elektriskt system samt ett forfarande av inledningsvis definierat slag, vilka ar fOrbattrade i atminstone nagot hanseende relativt tidigare kanda sadana elektriska system samt fOrfaranden. SUMMARY OF THE INVENTION The object of the present invention is to provide an electrical system and a method of initially defined kind, which are improved in at least some respect relative to prior art such electrical systems and methods.

Detta syfte uppnas vad galler det elektriska systemet genom att forse ett sadant elektriskt system med de i den kannetecknande delen hos patentkravet 1 uppraknade sardragen. This object is achieved as far as the electrical system is concerned by providing such an electrical system with the features listed in the pitcher part of claim 1.

Genom att efter avslutad motorstartprocedur, cla ju brytaren ar sluten och startbatteriet ar anslutet till kraftbatteriets fOrbrukarsida och darmed till generatorn for mojlig ateruppladdning av startbatteriet, mata strammen igenom brytaren och Oppna bryta- ren sa snart ett villkor som star i samband med att efter avslu- tandet av motorproceduren en viss grad av urladdning av startbatteriet skett ar uppfyllt, kan startbatteriet effektivt skyddas mot allvarlig urladdning, vilket i annat fall skulle kunna ske i det fall det elektriska systemet av nagon anledning efter motorfordonets start under en tidsperiod av namnda forbrukare belastas med ett 3 uttag av en hOgre elektrisk effekt an generatorn formar alstra. Ar dock namnda villkor inte uppfyllt, dvs. nagon urladdning av sadan grad ej skett efter avslutande av motorstartproceduren, da kan brytaren vara sluten for att mojliggora Onskvard ateruppladdning av startbatteriet. By after the engine start procedure is completed, the switch is closed and the starter battery is connected to the power battery's Consumer side and thus to the generator for possible recharging of the starter battery, feed the current through the switch and Open the switch as soon as a condition arises. If a certain degree of discharge of the starter battery has been fulfilled, the starter battery can be effectively protected against serious discharge, which could otherwise occur if the electrical system for some reason after the start of the motor vehicle for a period of time is charged by said consumer with a 3 outlets of a higher electrical power than the generator forms generate. However, the said conditions are not met, ie. no discharge of such a degree has occurred after completion of the engine start-up procedure, then the switch may be closed to enable Onskvard recharging of the starter battery.

Enligt en utforingsform av uppfinningen innefattar det elektriska systemet ett organ utformat att mata den tid strommen genom namnda brytare har en och sarnma riktning, och inrattningen ar utformad att styra brytaren att Oppna nar efter avslutad motor- startprocedur strOm kontinuerligt flutit i namnda strOmvag fran startbatteriet mot namnda fOrbrukarsida under en bestamd tid, sasom atminstone 10 sekunder. Genom att villkoret att strOm skall ha flutit i "fel" riktning i namnda stromvag kontinuerligt, dvs. i ett strack, ska ha uppfyllts innan brytaren oppnas fOr skyddande av startbatteriet undviks att den oppnas pa grund av nagon i det narmast momentan svangning, sasom spanningsspik, hos nagon parameter i det elektriska systemet. Darigenom kan ateruppladdning av startbatteriet fortsattas trots en sadan momentan svang- ning. According to an embodiment of the invention, the electrical system comprises a means designed to supply the time the current through said switch has one and the same direction, and the device is designed to control the switch to open after completion of the engine start procedure current continuously flowing in said current path from the starter battery towards said Consumer Page for a specified time, such as at least 10 seconds. By the condition that current must have flowed in the "wrong" direction in said current wave continuously, ie. in one stretch, must be filled before the switch is opened to protect the starter battery, it is avoided to be opened due to any of the nearest instantaneous oscillations, such as voltage spikes, of any parameter in the electrical system. As a result, recharging of the starter battery can be continued despite such a momentary oscillation.

Enligt en annan utfOringsform av uppfinningen innefattar det elektriska systemet en enhet utformad att vid upptradande av en strOm som efter avslutad motorstartsprocedur kontinuerligt flyter i namnda stromvag fran startbatteriet mot namnda forbrukarsida berakna tidsintegralen hos den strOmmen, och inrattningen är utformad att styra namnda brytare att oppna nar namnda tidsintegral av strommen Overskrider en fOrutbestamd niva, sasom 0,1 Ah. Genom att anvanda ett sadant villkor for brytande av strOm- vagen mellan startbatteriet och kraftbatteriets forbrukarsida blir 4 det mojligt att efter avslutad motorstartprocedur ha namnda brytare fortsatt sluten aven om strommen igenom den under en kortare tid flyter i "fel" riktning eller till och med under en langre tid gor detta och är svag. Det kan anda garanteras att startbatteriet maximalt urladdas med en laddning som motsvarar namnda fOrutbestamda niva. According to another embodiment of the invention, the electrical system comprises a unit designed to, upon the occurrence of a current which, after completion of the engine start procedure, continuously flows in said current path from the starter battery towards said consumer side, calculate the time integral of that current, and the device is designed to control said switch. the said time integral of the current Exceeds a predetermined level, such as 0.1 Ah. By using such a condition for breaking the current path between the starter battery and the consumer side of the power battery, it becomes possible after the engine start procedure has said switch to remain closed even if the current through it flows for a short time in the "wrong" direction or even below for a long time does this and is weak. It can be guaranteed that the starter battery is maximally discharged with a charge corresponding to the predetermined level.

Enligt en annan utfOringsform av uppfinningen innefattar det elektriska systemet en anordning utformad att efter avslutad mo- torstartprocedur berakna ett varde for startbatteriets laddnings- grad och jamfOra detta varde med ett varde som motsvarar fullladdat startbatteri, och inrattningen är utformad att styra namnda brytare att Oppna vid ett av denna anordning beraknat varde pa startbatteriets laddningsgrad som motsvarar att startbatteriet är att anse som fulladdat. Harigenom tillses att startbatteriet sepa- reras fran kraftbatteriets forbrukarsida nar det inte langre finns nagot behov av att ladda startbatteriet. According to another embodiment of the invention, the electrical system comprises a device designed to, after completion of the engine starting procedure, calculate a value for the degree of charge of the starter battery and compare this value with a value corresponding to a fully charged starter battery, and the device is designed to control said switch to open at a value calculated by this device on the degree of charge of the starter battery which corresponds to the starter battery being regarded as fully charged. This ensures that the starter battery is separated from the consumer battery's consumer side when there is no longer any need to charge the starter battery.

Enligt en vidareutveckling av sistnamnda utfOringsforrn är namnda anordning utformad att vid sin berakning av ett varde for startbatteriets laddningsgrad bestamma att startbatteriet är att anse som fulladdat i det fall att den av namnda medel uppmatta strommen i namnda strOmvag fran fOrbrukarsidan mot startbatteriet under en farutbestamd tidsperiod, sasom exempelvis at- minstone fern minuter, haft ett varde under en fOrutbestamd niva, sasom 0,2 A. Nar laddstrOmmen sjunkit till ett sadant varde kan det vara lampligt att separera startbatteriet fran kraftbatteriets fOrbrukarsida. According to a further development of the latter embodiment, said device is designed to determine when calculating a value for the degree of charge of the starter battery that the starter battery is to be considered fully charged in the event that the current supplied by said means in said current path from the consumer side towards the starter battery. such as, for example, at least four minutes, had a value below a predetermined level, such as 0.2 A. When the charging current has dropped to such a value, it may be appropriate to separate the starter battery from the power side of the power battery.

Enligt en annan utforingsform av uppfinningen är namnda anordning utformad att vid sin berakning av ett varde pa startbatteriets laddningsgrad jamfOra den hastighet med vilken en av namnda medel uppmatt strom i namnda stromvag fran forbrukarsidan mot startbatteriet sjunker med ett forutbestamt varde fOr denna has- tighet, sasom 0,1 A/h, och anse att startbatteriet är fulladdat nar namnda hastighet underskrider namnda forutbestamda varde for hastigheten. According to another embodiment of the invention, said device is designed to, when calculating a value of the degree of charge of the starter battery, compare the speed at which a current measured by said means in said current path from the consumer side towards the starter battery decreases by a predetermined value for this speed, as 0.1 A / h, and consider that the starter battery is fully charged when said speed falls below said predetermined value for the speed.

Enligt en annan utforingsform av uppfinningen innefattar det elektriska systemet ett organ utformat att efter avslutad motorstartsprocedur bestamma temperaturen hos kraftbatteriet, medel utformade att utifran vardet pa den bestamda temperaturen berakna ett bOrvarde fOr spanningen over kraftbatteriet, en anord- fling utformad att berakna ett varde pa startbatteriets laddnings- grad och jamfOra detta varde med ett varde som motsvarar fulladdat startbatteri, ett organ utformat att mata spanningen over kraftbatteriet och ett organ utformat att jamfOra det beraknade bOrvardet hos spanningen med namnda uppmatta spanning och i det fall namnda brytare ãr Open och startbatteriet som ett resul- tat av anordningens jamfOrelse ej är att anse som fulladdat sluta brytarna i det fall namnda uppmatta spanning är vasentligen lika med namnda bOrvarde hos spanningen, vilket innebar att den ãr atminstone 95% eller atminstone 98% av beirvardet hos span- ningen. Flarigenom tillses att efter det att brytaren Oppnats pa grund av risk for att startbatteriet ska laddas ur Mr mycket pa grund av en sa stor last pa det elektriska systemet som genera-torn inte fOrmar ensam klara av och darigenom spanningen Over kraftbatteriet sjunkit, startbatteriet kan laddas upp sa snart fOr- hallandena medger detta, dvs. kraftbatteriet har ater laddats upp 6 av generatorn till en spanning pa vasentligen samma niva som bervardet fOr spanningen och darmed fOrutsattningar finns for att ladda upp startbatteriet. According to another embodiment of the invention, the electrical system comprises a means designed to determine the temperature of the power battery after completion of the engine start procedure, means designed to calculate from the value of the determined temperature a setpoint for the voltage across the power battery, a device designed to calculate a value of the starter battery. degree of charge and compare this value with a value corresponding to a fully charged starter battery, a means designed to supply the voltage across the power battery and a means designed to compare the calculated bore value of the voltage with said charged voltage and in that case said switch is Open and the starter battery as a The result of the comparison of the device is not to be considered as fully charged to close the switches in the case where said rated voltage is substantially equal to said setpoint of the voltage, which meant that it is at least 95% or at least 98% of the setpoint of the voltage. This ensures that after the circuit breaker has been opened due to the risk that the starter battery will be discharged Mr much due to such a large load on the electrical system that the generator alone cannot handle and thereby the voltage across the power battery has dropped, the starter battery can be charged up as soon as the conditions allow this, ie. the power battery has been recharged 6 by the generator to a voltage at essentially the same level as the value of the voltage and thus there are prerequisites for charging the starting battery.

Syftet med uppfinningen vad galler fOrfarandet uppnas genom att tillhandahalla ett forfarande enligt det sjalvstandiga forfarandepatentkravet. FOrdelarna med detta samt med fOrfarandena enligt de utforingsformer som finns angivna i de beroende fOrfarandepatentkraven framgar av beskrivningen ovan av det uppfinnings- enliga elektriska systemet. The object of the invention as to the method is achieved by providing a method according to the independent method patent claim. The advantages of this and of the methods according to the embodiments set forth in the dependent claims patent claims appear from the description above of the electrical system according to the invention.

Uppfinningen avser aven ett datorprogram med sardragen enligt patentkrav 13, en datorprogramprodukt med sardragen enligt patentkrav 14, en elektronisk styrenhet med sardragen enligt pa- tentkrav 15 samt ett motorfordon med sardragen enligt patentkrav 16. The invention also relates to a computer program with the sardrae according to claim 13, a computer program product with the sardrae according to claim 14, an electronic control unit with the sardrae according to claim 15 and a motor vehicle with the sardrae according to claim 16.

Ytterligare fordelar med samt fordelaktiga sardrag has uppfinningen framgar av den efterfoljande beskrivningen. Additional advantages and advantageous features of the invention will become apparent from the following description.

KORT BESKRIVNING AV RITNINGARNA Harefter beskrivs sasom exempel anforda utforingsformer av uppfinningen under hanvisning till bifogade ritningar, pa vilka: Fig. 1illustrerar mycket schematiskt ett elektriskt system en- ligt en utfOringsform av uppfinningen, 7 Fig. 2är ett diagram som illustrerar en mojlig utveckling av laddstrommen fOr ett startbatteri Over tiden efter avslutad motorstartprocedur hos ett motorfordon, Fig. 3är ett diagram som visar lasten pa ett elektriskt sy- stem enligt uppfinningen samt strammen mellan startbatteriet och en forbrukarsida hos kraftbatteriet hos det elektriska systemet over tiden for att illustrera olika utfOringsformer av uppfinningen, Fig. 4är ett flodesdiagram som illustrerar ett fOrfarande en- ligt en utfOringsform av uppfinningen, och Fig. är en principskiss Over en elektronisk styrenhet feu. implementering av ett forfarande enligt uppfinningen. BRIEF DESCRIPTION OF THE DRAWINGS Hereinafter described as exemplary embodiments of the invention with reference to the accompanying drawings, in which: Fig. 1 very schematically illustrates an electrical system according to an embodiment of the invention, Fig. 2 is a diagram illustrating a possible development of the charging drum For a starter battery Over time after completion of the engine start procedure of a motor vehicle, Fig. 3 is a diagram showing the load of an electrical system according to the invention and the current between the starter battery and a consumer side of the power battery of the electrical system over time to illustrate various embodiments of the invention. Fig. 4 is a flow chart illustrating a method according to an embodiment of the invention, and Fig. 4 is a schematic diagram of an electronic control unit. implementation of a method according to the invention.

DETALJERAD BESKRIVNING AV UTFORINGSFORMER AV UPPFINNINGEN I Fig. 1 illustreras mycket schematiskt den allmanna uppbyggna- den av ett elektriskt system enligt uppfinningen utformat att vara anordnat i ett schematiskt indikerat motorfordon 1 och vilket uppvisar tva seriekopplade kraft- eller servicebatterier 2 och darmed pa en sida parallellkopplat tva startbatterier 3. Batterierna ãr ex- empelvis 12 V-batterier, sa att driftsspanningen mellan kraftbat- teriets bada poler 4, 5 normalt ar ca 24 V. DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION Fig. 1 very schematically illustrates the general construction of an electrical system according to the invention designed to be arranged in a schematically indicated motor vehicle 1 and which has two series-connected power or service batteries side by side 2 and thus connected in parallel. two starter batteries 3. The batteries are, for example, 12 V batteries, so that the operating voltage between the power poles 4, 5 of the power battery is normally about 24 V.

Pa en fOrbrukarsida 6 av kraftbatterierna är en generator 7, en startmotor 8 och en elektronisk styrenhet 9 fOr styrning av kom- ponenter hos det elektriska systemet anslutna. Det papekas att 8 en mangd icke visade komponenter hos fordonet, vilka kraver fOrstirjning av elektricitet, är anslutna det elektriska systemet pa fOrbrukarsidan 6 av kraftbatterierna 2. On a consumer side 6 of the power batteries, a generator 7, a starter motor 8 and an electronic control unit 9 for controlling components of the electrical system are connected. It is noted that a number of components of the vehicle (not shown), which require electricity to be supplied, are connected to the electrical system on the consumer side 6 of the power batteries 2.

Det elektriska systemet uppvisar vidare en brytare 10, vilken via en inrattning 11 i form av ett kretskort är styrbar via tva via streckning antydda signaler Si, S2 fran relaer, av vilka signalen Si ar avsedd att harrOra fran en mantivrering av en startnyckel eller motsvarande has fordonet for startande av dettas motor och dá via inrattningen 11 styra brytaren 10 att slutas Mr att tillhan- dahalla en stromvag mellan startbatterierna 3 och kraftbatteriernas forbrukarsida och darmed strom till startmotorn 8. Den andra signalen 52 harrOr fran den elektroniska styrenheten 9 och styr aven den brytaren. Nar en av signalerna Si och S2 kraver slu- tande av brytaren 10 kommer denna att slutas via inrattningen 11. The electrical system further comprises a switch 10, which via a device 11 in the form of a circuit board is controllable via two signals S1, S2 indicated by a line from relays, of which the signal S1 is intended to be derived from a maneuvering of an ignition key or the like. the vehicle for starting its engine and then via the device 11 control the switch 10 to stop Mr to provide a current path between the starter batteries 3 and the consumer side of the power batteries and thereby power to the starter motor 8. The second signal 52 is from the electronic control unit 9 and also controls the the switch. When one of the signals S1 and S2 requires closing of the switch 10, this will be closed via the device 11.

Systemet innefattar aven schematiskt antydda medel 12 utformade att mata strommen igenom brytaren 10 samt organ 13 ut- formade att mata den tid strOmmen igenom brytaren har en och samma riktning. Ett organ 14 är anordnat att mata spanningen mellan kraftbatteripaketets bada paler 4, 5 och ett annat organ 15 ar utformat att bestamma temperaturen has kraftbatterierna. Detta kan ske genom direkt eller indirekt matning och berakning av temperaturen. Medel 12 samt organen 13-15 är utformade att sanda informationen vidare till den elektroniska styrenheten 9 Mr framtagande av lamplig relasignal S2. For denna skull inbegriper den elektroniska styrenheten 9 en enhet 16 utformad att vid upptradande av en stram som efter avslutad motorstartprocedur kon- tinuerligt flyter i strOmvagen fran startbatteriet mot fOrbrukarsidan 9 6 berakna tidsintegralen hos den strOmmen samt en anordning 17 utformad att efter avslutat motorstartprocedur berakna ett varde fOr startbatteriets laddningsgrad och jamfora detta varde med ett varde som motsvarar fulladdat startbatteri. The system also comprises schematically indicated means 12 designed to supply the current through the switch 10 and means 13 designed to supply the time the current through the switch has one and the same direction. A means 14 is arranged to supply the voltage between the two pawls 4, 5 of the power battery pack and another means 15 is designed to determine the temperature of the power batteries. This can be done by directly or indirectly feeding and calculating the temperature. Means 12 and the means 13-15 are designed to transmit the information further to the electronic control unit 9 Mr production of a suitable relay signal S2. For this purpose, the electronic control unit 9 comprises a unit 16 designed to calculate the time integral of that current when a motor which continuously flows in the current carriage from the starter battery to the consumer side 96 upon completion of an engine start procedure and a device 17 designed to calculate an engine start procedure after completion. value for the degree of charge of the starter battery and compare this value with a value corresponding to a fully charged starter battery.

I Fig. 2 illustreras en mojlig utveckling av den strom I som flyter i namnda stromvag Over tiden t efter avslutande av en motorstartprocedur fOr ateruppladdning av startbatterierna 3, och namnda anordning 17 kan vara utformad att bestamma att startbatterierna ãr att anse som fulladdade i det fall den av medal 12 uppmatta strommen i namnda strOmvag under en forutbestamd tidsperiod, sasom exempelvis atminstone fern minuter, haft ett varde under en fOrutbestamd niva, sasom 0,2 A, illustrerad genom den streckprickade linjen A i Fig. 2. Detta skulle da kunna innebara att in- rattningen 11 erhaller en signal for att styra brytaren 10 att Oppna och darmed koppla bort startbatterierna 3 fran fOrbrukarsidan 6, sa att dessa kan hallas fulladdade tills en motorstart skall genomfOras nasta gang. Fig. 2 illustrates a possible development of the current I flowing in said current path. Over the time t after completion of an engine start procedure for recharging the starter batteries 3, and said device 17 may be designed to determine that the starter batteries are to be considered fully charged in the case the current supplied by medal 12 in said current wave for a predetermined period of time, such as at least four minutes, had a value below a predetermined level, such as 0.2 A, illustrated by the dashed line A in Fig. 2. This could then mean that the device 11 receives a signal for controlling the switch 10 to open and thereby disconnect the starter batteries 3 from the consumer side 6, so that these can be kept fully charged until an engine start is to be carried out the next time.

I Fig. 3 illustreras schematiskt hur det elektriska systemet enligt uppfinningen beter sig vad galler styrningen av brytaren 10 under upptradande av olika driftsfOrhallanden hos det elektriska systemet. En linje a illustrerar utvecklingen av lasten pa det elektriska systemets forbrukarsida Over tiden t, varvid den streckade linjen G anger den maximala strom generatorn 7 fOrmar alstra. StrOmmen i strOmvagen mellan startbatterierna 3 och kraftbatteriets forbrukarsida 6, dvs. igenom brytaren 10, är indikerad med I. Fig. 3 schematically illustrates how the electrical system according to the invention behaves as regards the control of the switch 10 during the occurrence of different operating conditions of the electrical system. A line a illustrates the development of the load on the consumer side of the electrical system. Over time t, the dashed line G indicating the maximum current generator 7 forms to generate. The current in the current path between the starter batteries 3 and the consumer side 6 of the power battery, ie. through the switch 10, is indicated by I.

En motorstart ager rum vid tidpunkten to och da styr inrattningen 11 brytaren 10 att slutas for aktivering av startmotorn 8 genom vilket startbatterierna blir delvis urladdade och varpa en strom I flyter fran kraftbatteriets forbrukarsida till startbatterierna for uppladdning av dessa. Vid tidpunkten ti blir mycket kortvarigt helt plOtsligt lasten pa det elektriska systemet hogre an vad ge- neratorn fOrmar generera, vilket innebar att strom kommer att flyta aven fran startbatterierna for fOrsOrjning av det elektriska systemets fOrbrukare genom att brytaren 10 är sluten. Tidsintegralen av denna "felaktigt riktade" strOm i namnda strOmvag nar emellertid inte upp till en forutbestamd niva, vid vilken inrattning- en 11 skulle styra brytaren 10 att Oppna, sa att sa snart den mycket kortvariga lasttoppen Li är Over kommer en laddning av startbatterierna 3 att fortsatta. An engine start takes place at time two and then the device 11 controls the switch 10 to close for activating the starter motor 8 through which the starter batteries become partially discharged and warp a current I flows from the consumer side of the power battery to the starter batteries for charging them. At time t very briefly, all of a sudden, the load on the electrical system becomes higher than what the generator is generating, which means that current will also flow from the starter batteries to supply the consumers of the electrical system by closing the switch 10. However, the time integral of this "incorrectly directed" current in said current carriage does not reach a predetermined level, at which the device 11 would control the switch 10 to open, so that as soon as the very short load peak Li is over, a charge of the starting batteries 3 will to continue.

Vid tidpunkten t2 upptrader aterigen en "Overlast" hos det elekt- riska systemet, och denna gang varar denna lasttopp L2 betydligt langre, och nar namnda tidsintegral av strOmmen I i den felaktiga riktningen i stromvagen nail namnda fOrutbestamda niva styr inrattningen 11 brytaren 10 att Oppna, vilket sker vid tidpunkten t3. At time t2 an "overload" of the electrical system again occurs, and this time this load peak L2 lasts much longer, and when said time integral of the current I in the wrong direction in the current path nail said predetermined level, the device 11 controls the switch 10 to open. , which occurs at time t3.

Vid tidpunkten t4 sjunker anyo lasten fran det elektriska syste- mets forbrukare under det G vad generatorn formAr leverera och denna borjar da ladda upp kraftbatterierna som under tiden mellan t3 och t4 har fatt bista generatorn med att leverera elektrisk energi till farbrukarna. Den spanning som upprnats via organet 14 jamfors med ett borvarde pa spanningen beraknat utifran in- formation om temperaturen hos kraftbatterierna, och nar jamfOrelsen visar att spanningen Over kraftbatterierna natt upp till vasentligen samma niva som namnda bOrvarde styr inrattningen 11 brytaren 10 att Ater slutas, vilket sker vid tidpunkten t5. Darige- nom fortsattes uppladdningen av startbatterierna. Vid tidpunkten 11 t6 upptrader en ny lasttopp L3, men denna gang är den endast obetydligt over den niva som generatorn sjalv klarar av, sa att en ringa urladdning av startbatterierna kommer att ske, men tidsintegralen av strOmmen mellan tidpunkten t6 och t7 kommer att vara under forutbestamda niva, sa att brytaren 10 halls sluten och uppladdning av startbatterierna fortsattes efter tidpunkten t7 for att sedan avslutas vid tidpunkten ta genom att inrattningen 11 styr brytaren 10 att Oppna pa grund av att strommen I under en forutbestamd tidsperiod underskridit ett visst varde. Efter tid- punkten ts kommer sedan brytaren 10 att hallas Open anda tills en motorstart ska genomforas igen. At time t4, any load from the electrical system's consumers drops below the G what the generator is capable of delivering and this then begins to charge the power batteries which during the time between t3 and t4 have had to assist the generator in delivering electrical energy to the consumers. The voltage obtained via the means 14 is compared with a drilling value of the voltage calculated on the basis of information on the temperature of the power batteries, and when the comparison shows that the voltage across the power batteries up to substantially the same level as said drilling device controls the switch 11 to close again. occurs at time t5. As a result, the charging of the starter batteries continued. At time 11 t6 a new load peak L3 occurs, but this time it is only slightly above the level that the generator itself can handle, so that a small discharge of the starter batteries will take place, but the time integral of the current between time t6 and t7 will be below predetermined level, so that the switch 10 is kept closed and charging of the starter batteries is continued after the time t7 and then ends at the time take by the device 11 controlling the switch 10 to open due to the current I being below a certain value for a predetermined period of time. After time ts, switch 10 will then be held in the Open spirit until an engine start is to be performed again.

I Fig. 4 visas ett flOdesdiagram som illustrerar ett forfarande enligt en utfOringsform av uppfinningen fOr spanningsreglering hos ett elektriskt system enligt uppfinningen, vid vilket i ett forsta steg Si startmotoraktivering begars. Sam ett resultat av denna begaran ansluts startbatteriet till forbrukarsidan hos kraftbatteriet i steg S2. Sedan aktiveras startmotorn i steg S3 och i steg S4 stalls fragan om motorstartproceduren är avslutad, och om svaret pa denna fraga är ja gas det over till steg S5, i vilket den strom som flyter mellan startbatteriet och kraftbatteriets fOrbrukarsida mats. Ar daremot svaret pa fragan nej, cla stalls fragan igen. Darefter stalls i steget S6 fragorna 1) om startbatteriet urladdats i forutbestamd utstrackning sedan motorstartproceduren avslutats eller 2) om startbatteriet är fulladdat, och om svaret pa nagon av dessa fragor stallda i steget 56 är ja frankopplas i steg S7 startbatteriet fran kraftbatteriets forbrukarsida for att skydda startbatteriet mot ytterligare urladdning. Ar dock svaret pa [Dada fragor stallda i steget 86 nej, da halls startbatteriet fortsatt anslutet till kraftbatteriets fOrbrukarsida. 12 Datorprogramkod fOr implementering av ett fOrfarande enligt uppfinningen är lampligen inkluderad i ett datorprogram som är inlasningsbart till internminnet hos en dator, sasom internminnet hos en elektronisk styrenhet hos ett fordon. Ett sadant datorpro- gram är lampligen tillhandahallet via en datorprogramprodukt innefattande ett av en elektronisk styrenhet lasbart datalagringsmedium som är varaktigt, dvs. icke-Overgaende, vilket datalagringsmedium har datorprogrammet lagrat darpa. Namnda da- talagringsmedium är exempelvis ett optiskt datalagringsmedium i form av en CD-ROM-skiva, en DVD-skiva etc., ett magnetiskt datalagringsmedium i form av en harddisk, en diskett, ett kassettband etc., eller ett Flashminne eller ett minne av typen ROM, PROM, EPROM eller EEPROM. Fig. 4 shows a flow chart illustrating a method according to an embodiment of the invention for voltage control of an electrical system according to the invention, in which in a first step Si starter motor activation is requested. As a result of this request, the starter battery is connected to the consumer side of the power battery in step S2. Then the starter motor is activated in step S3 and in step S4 the question is asked if the engine start procedure is completed, and if the answer to this question is yes it is transferred to step S5, in which the current flowing between the starter battery and the power side of the power battery is fed. If, on the other hand, the answer to the question is no, then the question is asked again. Then in step S6 the questions are asked 1) if the starter battery has been discharged to a predetermined extent after the engine start procedure has been completed or 2) if the starter battery is fully charged, and if the answer to any of these questions is asked in step 56, yes yes in step S7 the starter battery is disconnected from the power battery. the starter battery against further discharge. However, if the answer to [Dada questions asked in step 86 is no, then the starter battery is still connected to the power battery's Consumer side. Computer program code for implementing a method according to the invention is suitably included in a computer program which is loadable into the internal memory of a computer, such as the internal memory of an electronic control unit of a vehicle. Such a computer program is suitably provided via a computer program product comprising a data storage medium which can be read by an electronic control unit and which is durable, i.e. non-Transient, which data storage medium the computer program has stored darpa. Said data storage medium is, for example, an optical data storage medium in the form of a CD-ROM, a DVD disc, etc., a magnetic data storage medium in the form of a hard disk, a floppy disk, a cassette tape, etc., or a flash memory or a memory of type ROM, PROM, EPROM or EEPROM.

Fig. 5 illustrerar mycket schematiskt en elektronisk styrenhet 9 innefattande ett exekveringsmedel 18, sasom en central processorenhet (CPU), fOr exekvering av datorprogramvara. Exekveringsmedlet 18 kommunicerar med ett minne 19, exempelvis av typen RAM, via en databuss 20. Styrenheten 9 innefattar aven datalagringsmedium 21, exempelvis i form av ett Flashminne eller ett minne av typen ROM, PROM, EPROM eller EEPROM. Exekveringsmedlet 18 kommunicerar med datalagringsmediet 21 via databussen 20. Ett datorprogram innefattande datorprogramkod fOr implementering av ett fOrfarande enligt uppfinningen, exempelvis i enlighet med den i Fig. 4 illustrerade utforingsformen, är lagrat pa datalagringsmediet 21. Fig. 5 very schematically illustrates an electronic control unit 9 comprising an execution means 18, such as a central processor unit (CPU), for executing computer software. The execution means 18 communicates with a memory 19, for example of the RAM type, via a data bus 20. The control unit 9 also comprises data storage medium 21, for example in the form of a Flash memory or a memory of the type ROM, PROM, EPROM or EEPROM. The execution means 18 communicates with the data storage medium 21 via the data bus 20. A computer program comprising computer program code for implementing a method according to the invention, for example in accordance with the embodiment illustrated in Fig. 4, is stored on the data storage medium 21.

Uppfinningen är givetvis inte pa nagot satt begransad till de ovan beskrivna utfOringsformerna, utan en mangd mojligheter till mo- 1 3 difikationer darav torde vara uppenbara for en fackman pa omradet utan att denne for den skull avviker fran uppfinningens ram sadan denna definieras i bifogade patentkrav. 14 The invention is of course not limited in any way to the embodiments described above, but a multitude of possibilities for modifications thereof should be obvious to a person skilled in the art without him therefore deviating from the scope of the invention as defined in the appended claims. 14

Claims (16)

PatentkravPatent claims 1. Elektriskt system utformat att vara anordnat i ett motorfordon (1) och innefattande: - ett kraftbatteri (2), - ett med kraftbatteriet parallellkopplat startbatteri (3), en generator (7) samt fOrbrukare av elektrisk energi innefattande en startmotor (8) anslutna mellan motsatta paler (4, 5) hos kraftbatteriet pa en fOrbrukarsida (6) darav motsatt kraftbatteriets sida fOr anslutning till startbatteriet, - en brytare (10) anordnad mellan kraftbatteriets ena pol och startbatteriet (3) for att mojliggora frankoppling av startbatteriet fran namnda fOrbrukarsida (6) och att vara oppen fOr sadan frankoppling nar motorfordonets motor är avstangd, och en inrattning (11) utformad for styrning av brytaren och att styra brytaren (10) att slutas vid aktivering av startmotorn (8) for start av fordonets motor for att tillhanda- halla en stromvag mellan startbatteriet och kraftbatteri- ets forbrukarsida (6), och darmed strOm till startmotorn, kannetecknat darav, att det dessutom innefattar medel (12) utformade att mata strOmmen igenom namnda brytare (10), och att inrattningen (11) är utformad att efter avslutad mo- torstartsprocedur styra brytaren att oppna sa snart ett villkor som star i samband med att viss grad av urladdning av startbatteriet (3) skett efter avslutandet av motorstartsproceduren ãr uppfyllt.Electrical system designed to be arranged in a motor vehicle (1) and comprising: - a power battery (2), - a starter battery (3) connected in parallel with the power battery, a generator (7) and consumers of electrical energy comprising a starter motor (8) connected between opposite posts (4, 5) of the power battery on a consumer side (6) thereof opposite the side of the power battery for connection to the starter battery, - a switch (10) arranged between one pole of the power battery and the starter battery (3) to enable disconnection of the starter battery from said consumer side (6) and to be open for such disconnection when the engine of the motor vehicle is switched off, and a device (11) designed to control the switch and to control the switch (10) to close when activating the starter motor (8) for starting the vehicle engine for to provide a current path between the starter battery and the consumer side of the power battery (6), and thus power to the starter motor, characterized in that it also comprises means (12 ) are designed to supply the current through said switch (10), and that the device (11) is designed to control the switch to open as soon as a condition which is in connection with a certain degree of discharge of the starter battery (3) has taken place after the end of the engine start procedure. after the end of the engine start procedure is fulfilled. 2. Elektriskt system enligt krav 1, kannetecknat darav, att det innefattar ett organ (13) utformat att mata den tid strOmmen igenom namnda brytare (10) har en och samma riktning, och att inrattningen (11) är utformad att styra brytaren att Oppna nar efter avslutad motorstartsprocedur strOm kontinuerligt flutit i namnda stromvag fran startbatteriet (3) mot namnda fOrbrukarsida (6) under en bestamd tid, sasom atminstone 10 sekunder.Electrical system according to claim 1, characterized in that it comprises a means (13) designed to supply the time current through said switch (10) has one and the same direction, and that the device (11) is designed to control the switch to open. When, after completing the engine start procedure, current has continuously flowed in said current path from the starter battery (3) towards said Consumer side (6) for a specified time, such as at least 10 seconds. 3. Elektriskt system enligt krav 1, kannetecknat darav, att det dessutom innefattar en enhet (16) utformad att vid upptradande av en strom som efter avslutad motorstartsprocedur kontinuerligt flyter i namnda stromvag fran startbatteriet (3) mot namnda fOrbrukarsida (6) berakna tidsintegralen hos den strom men, och att inrattningen (11) ar utformad att styra namnda brytare (10) att Oppna nar namnda tidsintegral av strOmmen overskrider en fOrutbestamd niva, sasom 0,1 Ah.Electrical system according to claim 1, characterized in that it further comprises a unit (16) designed to, when a current occurs which after completion of the engine start procedure continuously flows in said current path from the starter battery (3) towards said consumer side (6), calculate the time integral of that current, and that the device (11) is designed to control said switch (10) to open when said time integral of the current exceeds a predetermined level, such as 0.1 Ah. 4. Elektriskt system enligt nagot av foregaende krav, !canna- tecknat darav, att det innefattar en anordning (17) utformad att efter avslutad motorstartprocedur berakna ett varde for startbatteriets (3) laddningsgrad och jamfOra detta varde med ett varde som motsvarar fulladdat startbatteri, och att inrattningen (11) ar utformad att styra namnda brytare (10) att Oppna vid ett av denna anordning beraknat varde for startbatteriets laddningsgrad som motsvarar att startbatteriet (3) är att anse som fulladdat.4. An electrical system according to any one of the preceding claims, characterized in that it comprises a device (17) designed to calculate, after completion of the engine starting procedure, a value for the degree of charge of the starter battery (3) and compare this value with a value corresponding to a fully charged starter battery. and that the device (11) is designed to control said switch (10) to open at a value calculated by this device for the degree of charge of the starter battery which corresponds to the starter battery (3) being regarded as fully charged. 5. Elektriskt system enligt krav 4, kannetecknat darav, att namnda anordning (17) är utformad att vid sin berakning av 16 ett varde fOr startbatteriets (3) laddningsgrad bestamma att startbatteriet ar att anse som fulladdat i det fall den av namnda medel (12) uppmatta strOmmen i namnda strOmvag fran fOrbrukarsidan mot startbatteriet under en forutbestamd tidsperiod, sasom exempelvis atminstone fern minuter, haft ett varde under en farutbestamd niva, sasom 0,2 A.Electrical system according to claim 4, characterized in that said device (17) is designed to determine in its calculation of 16 a value for the degree of charge of the starter battery (3) that the starter battery is to be regarded as fully charged in the case of said means (12). ) the rated current in said current path from the consumer side towards the starter battery for a predetermined period of time, such as for example at least four minutes, had a value below a predetermined level, such as 0.2 A. 6. Elektriskt system enligt krav 4, kannetecknat darav, att namnda anordning (17) är utformad att vid sin berakning av ett varde for startbatteriets (3) laddningsgrad jamfOra den hastighet med vilken en av namnda medel (12) uppmatt strom i namnda stromvag fran forbrukarsidan (6) mot startbatteriet (3) sjunker med ett forutbestamt varde fOr denna hastighet, sasom 0,1 A/h, och anse att startbatteriet ar ful- laddat nar namnda hastighet underskrider namnda fOrutbe- stamda varde fOr hastigheten.Electrical system according to claim 4, characterized in that said device (17) is designed to, when calculating a value for the degree of charge of the starter battery (3), compare the speed at which a current measured by said means (12) in said current path from the consumer side (6) towards the starter battery (3) decreases by a predetermined value for this speed, such as 0.1 A / h, and consider that the starter battery is fully charged when said speed exceeds said predetermined value for the speed. 7. Elektriskt system enligt nagot av fOregaende krav, [(thinetecknat darav, att det dessutom innefattar ett organ (15) ut- format att efter avslutad motorstartsprocedur bestamma temperaturen hos kraftbatteriet (2), medel utformade att utifran vardet pa den bestamda temperaturen berakna ett bOrvarde fOr spanningen Over kraftbatteriet, en anordning (17) utformad att berakna ett varde fOr startbatteriets laddnings- grad och jamfora detta varde med ett varde som motsvarar fulladdat startbatteri (3), ett organ (14) utformat att mata spanningen Over kraftbatteriet (2) och ett organ utformat att jamfOra det beraknade bOrvardet hos spanningen med namnda uppmatta spanning och i det fall namnda brytare (10) ar Open och startbatteriet (3) som ett resultat av an- 17 ordningens (17) jamforelse ej är att anse som fulladdat sluta brytaren i det fall namnda uppmatta spanning är vasentligen lika med namnda bOrvarde hos spanningen, vilket innebar att den är atminstone 95% eller atminstone 98% av borvardet hos spanningen.Electrical system according to any one of the preceding claims, [(characterized in that it further comprises a means (15) designed to determine, after completion of the engine start procedure, the temperature of the power battery (2), means designed to calculate from the value of the determined temperature a bore for the voltage Over the power battery, a device (17) designed to calculate a value for the degree of charge of the starter battery and compare this value with a value corresponding to a fully charged starter battery (3), a means (14) designed to supply the voltage Over the power battery (2) and a means designed to compare the calculated setpoint of the voltage with said applied voltage and in that case said switch (10) is open and the starting battery (3) as a result of the comparison of the device (17) is not to be considered as fully charged end the switch in the case of said applied voltage is substantially equal to said setpoint of the voltage, which meant that it is at least 95% or at least 98% of the setpoint one at the voltage. 8. FOrfarande fOr spanningsreglering hos ett elektriskt system utformat att vara anordnat i ett motorfordon (1) och vilket innefattar ett kraftbatteri (2), ett med kraftbatteriet parallell- kopplat startbatteri (3) samt en generator (7) och forbrukare av elektrisk energi innefattande en startmotor (8) anslutna mellan motsatta poler (4, 5) hos kraftbatteriet pa en forbrukarsida (6) darav motsatt kraftbatteriets sida fOr anslutning till startbatteriet, varvid startbatteriet (3) halls frankopplat fran namnda forbru- karsida (6) av kraftbatteriet (2) nar motorfordonets motor är avstangd genom att en strOmvag mellan startbatteriet och kraftbatteriets forbrukarsida halls bruten och namnda stromvag sluts vid aktivering av startmotorn (8) fOr start av fordo- nets motor, kannetecknat darav, att det innefattar stegen att 1. mata strOmmen i namnda strOmvag, och 2. bryta namnda stromvag sa snart efter avslutad motorstartsprocedur ett villkor som star i samband med att viss grad av urladdning av startbatteriet (3) skett efter avslutandet av motorstartproceduren är uppfyllt.A method for voltage regulation of an electrical system designed to be arranged in a motor vehicle (1) and which comprises a power battery (2), a starter battery (3) connected in parallel with the power battery and a generator (7) and consumer of electrical energy comprising a starter motor (8) connected between opposite poles (4, 5) of the power battery on a consumer side (6) thereof opposite the side of the power battery for connection to the starter battery, the starter battery (3) being kept disconnected from said consumer side (6) of the power battery (2). ) when the motor of the motor vehicle is switched off by holding a current between the starter battery and the consumer side of the power battery and said current path closes when activating the starter motor (8) to start the vehicle's engine, characterized in that it includes the steps of 1. supplying the current in said power surge, and 2. break said power surge as soon as after the end of the engine start procedure a condition that is associated with a certain degree of discharge of st. the type battery (3) occurred after the end of the engine start procedure is fulfilled. 9. Forfarande enligt krav 8, kannetecknat darav, att det innefattar stegen att: 18 1. mata den tid strOmmen i namnda stromvag har en och samma riktning, och 2. bryta namnda strOmvag nar efter avslutad motorstartprocedur strom kontinuerligt flutit i namnda stromvag fran startbatteriet (3) mot namnda fOrbrukarsida (6) un- der en bestarnd tid, sasom 10 sekunder.A method according to claim 8, characterized in that it comprises the steps of: 1. feeding the time current in said current path has one and the same direction, and 2. breaking said current path when after completion of engine start procedure current has continuously flowed in said current path from the starter battery (3) towards the said Consumer side (6) for a fixed time, such as 10 seconds. 10. FOrfarande enligt krav 8, kannetecknat darav, att det innefattar stegen att: vid upptradande av en strom som efter avslutande motorstartprocedur kontinuerligt flyter i namnda stromvag ft-6n startbatteriet (3) mot namnda forbrukarsida (6) berakna tidsintegralen hos den strOmmen, och - bryta namnda strOmvag nar namnda tidsintegral av strommen Overskrider en fOrutbestamd niv6, sAsom 0,1 Ah.A method according to claim 8, characterized in that it comprises the steps of: calculating the time integral of that current, upon occurrence of a current flowing continuously in said current path of the starting battery (3) towards said consumer side (6) towards said consumer side (6), and - break the said current wave when the said time integral of the current exceeds a predetermined level 6, such as 0.1 Ah. 11. FOrfarande enligt n6got av kraven 8-10, kannetecknat darav, att det innefattar stegen att: berakna, efter avslutad motorstartprocedur, ett varde for startbatteriets (3) laddningsgrad, 1. jamfOra det beraknade vardet med ett varde som motsvarar fulladdat startbatteri, och - bryta namnda stromvag vid ett beraknat varde for startbatteriets (3) laddningsgrad som motsvarar att startbatteriet är att anse som fulladdat.A method according to any one of claims 8-10, characterized in that it comprises the steps of: calculating, after completion of the engine start procedure, a value for the degree of charge of the starter battery (3), 1. comparing the calculated value with a value corresponding to a fully charged starter battery, and break said current wave at a calculated value for the degree of charge of the starter battery (3) which corresponds to the starter battery being considered fully charged. 12. FOrfarande enligt nagot av kraven 8-11, kannetecknat darav, att det innefattar stegen att: 19 bestamma, efter avslutad motorstartsprocedur, temperaturen hos kraftbatteriet (2), berakna ett barvarde far spanningen Over kraftbatteriet utifran vardet pa den uppmatta temperaturen, — berakna ett varde far startbatteriets (3) laddningsgrad och jamfora detta varde med ett varde som motsvarar fulladdat startbatteri, — mata spanningen Over kraftbatteriet (2), jamfora det beraknade barvardet hos spanningen med namnda uppmatta spanning, och sluta namnda stromvag i det fall stramvagen är bruten, startbatteriet (3) som ett resultat av namnda jamforelse ej är att anse som fulladdat och namnda uppmatta spanning är vasentligen lika med namnda borvarde hos spanningen, vilket innebar att den ãr atminstone 95% eller atminstone 98% av borvardet hos spanningen.A method according to any one of claims 8-11, characterized in that it comprises the steps of: 19 determining, after completion of the engine start procedure, the temperature of the power battery (2), calculating a bar value before the voltage across the power battery is based on the measured temperature, - calculating a value of the charge level of the starter battery (3) and compare this value with a value corresponding to a fully charged starter battery, - supply the voltage across the power battery (2), compare the calculated bar value of the voltage with said charged voltage, and close said current wave in case the current is broken , the starting battery (3) as a result of said comparison is not to be regarded as fully charged and said charged voltage is substantially equal to said drilling value of the voltage, which meant that it is at least 95% or at least 98% of the drilling value of the voltage. 13. Datorprogram som är laddningsbart direkt in i internminnet hos en dator, vilket datorprogram innefattar datorprogramkod far bringande av datorn att styra stegen enligt nagot av kra- ven 8-12 nar namnda datorprogram kors pa datorn.A computer program that is loadable directly into the internal memory of a computer, the computer program comprising computer program code causing the computer to control the steps according to any of claims 8-12 when said computer program is crossed on the computer. 14. Datorprogramprodukt innefattande ett varaktigt datalagringsmedium som ar lasbart av en dator, varvid datorpro- gramkoden hos ett datorprogram enligt krav 13 är lagrat pa datalagringsmediet.A computer program product comprising a durable data storage medium readable by a computer, the computer program code of a computer program according to claim 13 being stored on the data storage medium. 15. Elektronisk styrenhet far spanningsreglering hos ett elektriskt system utformat att vara anordnat i ett motorfordon (1) innefattande ett exekveringsmedel (18), ett till exekverings- medlet anslutet minne (19) och ett till exekveringsmedlet anslutet varaktigt datalagringsmedium (21), varvid datorprogramkoden hos ett datorprogram enligt krav 13 är lagrat pa namnda datalagringsmedium (21).An electronic control unit for voltage control of an electrical system designed to be arranged in a motor vehicle (1) comprising an execution means (18), a memory (19) connected to the execution means and a durable data storage medium (21) connected to the execution means, the computer program code of a computer program according to claim 13 is stored on said data storage medium (21). 16. Motorfordon, kannetecknat darav, att det innefattar ett elektriskt system enligt nagot av kraven 1-7 och/eller en elektronisk styrenhet (9) enligt krav 15. 21 IA- F;3 1 4 4 I F132- 2 Pi. p1 3 3/ if Begaran om startmotoraktivering Anslutning av startbatteri till fOrbrukarsida hos kraftbatteri Aktivering av startmotor Motorstartprocedur avslutad? Ne Ja Matning av strOm mellan startbatteri och kraftbatteriets forbrukarsida Har startbatteriet urladdats i fOrutbestarnd utstrackning sedan motorstartproceduren avslutats eller är startbatteriet fulladdat? Si S2 S3 S4 S Ja Fr6nkopppling av startbatteriet fr6n kraftbatteriets forbrukarsida Frs F13Motor vehicle, characterized in that it comprises an electrical system according to any one of claims 1-7 and / or an electronic control unit (9) according to claim 15. 21 IA-F; 3 1 4 4 I F132-2 Pi. p1 3 3 / if Request for starter motor Connection of starter battery to Consumer side of power battery Activation of starter motor Engine start procedure completed? No Yes Power supply between starter battery and consumer battery power side Has the starter battery been discharged to a predetermined extent since the engine start procedure was completed or is the starter battery fully charged? Say S2 S3 S4 S Yes Disconnection of the starter battery from the power side of the power battery Frs F13
SE1351493A 2013-12-13 2013-12-13 Dual battery system for motor vehicles and method of voltage regulation of such SE537877C2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE1351493A SE537877C2 (en) 2013-12-13 2013-12-13 Dual battery system for motor vehicles and method of voltage regulation of such
EP14870037.0A EP3080893A4 (en) 2013-12-13 2014-12-03 Electrical system for motor vehicles and method for voltage regulation of such
PCT/SE2014/051442 WO2015088425A1 (en) 2013-12-13 2014-12-03 Electrical system for motor vehicles and method for voltage regulation of such

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1351493A SE537877C2 (en) 2013-12-13 2013-12-13 Dual battery system for motor vehicles and method of voltage regulation of such

Publications (2)

Publication Number Publication Date
SE1351493A1 SE1351493A1 (en) 2015-06-14
SE537877C2 true SE537877C2 (en) 2015-11-10

Family

ID=53371567

Family Applications (1)

Application Number Title Priority Date Filing Date
SE1351493A SE537877C2 (en) 2013-12-13 2013-12-13 Dual battery system for motor vehicles and method of voltage regulation of such

Country Status (3)

Country Link
EP (1) EP3080893A4 (en)
SE (1) SE537877C2 (en)
WO (1) WO2015088425A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11383099B2 (en) * 2018-12-18 2022-07-12 Nucletron Operations B.V. Wireless afterloader

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ264225A (en) * 1994-08-11 1998-07-28 Glorywin Int Group Ltd Vehicle battery switch with state of charge sensing circuit
GB2302622B (en) * 1995-06-22 2000-03-29 Glorywin Int Group Ltd Battery controller
FR2749814B1 (en) * 1996-06-14 1998-07-31 Renault ELECTRIC POWER SUPPLY DEVICE FOR A MOTOR VEHICLE
SE514786C2 (en) * 1998-09-02 2001-04-23 Scania Cv Ab Electrical system for motor vehicles with dual batteries
DE19951128A1 (en) 1999-10-23 2001-04-26 Bosch Gmbh Robert Method and device for voltage regulation
DE10055076A1 (en) * 2000-11-07 2002-06-06 Bosch Gmbh Robert Device for optimizing switch operations has adaptation arrangement for adapting first energy branch characteristics and second energy branch characteristics
JP2008041620A (en) * 2006-08-10 2008-02-21 Nissan Motor Co Ltd Battery pack system
SE534891C2 (en) * 2009-06-09 2012-02-07 Scania Cv Ab Determination of charging time
SE535351C2 (en) * 2010-11-01 2012-07-03 Scania Cv Ab Activation device and activation method for a dual battery system

Also Published As

Publication number Publication date
SE1351493A1 (en) 2015-06-14
EP3080893A4 (en) 2017-10-04
EP3080893A1 (en) 2016-10-19
WO2015088425A1 (en) 2015-06-18

Similar Documents

Publication Publication Date Title
JP5488529B2 (en) Vehicle power supply control device
US10050437B2 (en) Power supply apparatus and power supply method
RU2479450C2 (en) Electrical system for vehicle, method of control over starter engine and disconnector of storage batteries in said electrical system
JP6844611B2 (en) Power supply system and its control method
JP5846073B2 (en) Power system
JP5924418B2 (en) Power storage system
US9598031B2 (en) Vehicle
JP6384601B2 (en) Power system
JP6107679B2 (en) Vehicle control device
JP5673658B2 (en) Power storage system
JP5154306B2 (en) Vehicle power supply
JP4513842B2 (en) Vehicle system
JP2011061886A (en) Power unit and vehicle including the same
SE537877C2 (en) Dual battery system for motor vehicles and method of voltage regulation of such
SE0950423A1 (en) Determination of charging time
CN104768823A (en) Method and apparatus for monitoring/controlling a heat engine of a hybrid vehicle
WO2014073391A1 (en) Control system for engine starter electric motor
JP2016220305A (en) Hybrid automobile and charge control device therefor
JP2020198762A (en) Control device of power supply device
JP2016132324A (en) Power supply
KR101713666B1 (en) Vehicle power managing apparatus
JP2024507113A (en) Systems, methods and devices for bidirectional DC short circuit protection
JP2018182810A (en) Power supply system
JP2016220427A (en) Power supply device
JP2015058821A (en) Vehicular power device

Legal Events

Date Code Title Description
NUG Patent has lapsed