瑞典专利SE0950610A1 Determination of battery condition

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公开号:SE0950610A1
申请号:SE0950610
申请日:2009-08-26
公开日:2011-02-27
发明作者:Gunnar Ledfelt
申请人:Scania Cv Ab；
IPC主号:

专利说明:

1015202530cycling capacity. High power is required for the SLI battery to power the starter motor.
Cycling capacity is required, to be able to be discharged and recharged a large number of times,because electrical devices use it when the engine is not running. Usually make up highpower and good cycling capacity conflicting properties of batteries. For itthe traditional battery system in ﬁ gur 1 therefore requires a compromise between thesetwo features, so that the SLI battery can be used for both of these functions. At leastone SLI battery 120 is therefore normally designed to be a battery where these twofunctions are balanced against each other. However, this leads to a suboptimaluse of the at least one SLI battery 120, as it can not be optimized forboth of these features.
Figure 2 shows a battery system in accordance with the state of the art provided with at leastone power battery 220 and at least one starter battery 230, each of which provideselectrical energy for various purposes. In this case, it provides at least onethe power battery 220 DC to the electrical devices used when the motor is notis running, e.g. lamps 211 and heating system 212. The at least one starter battery 230supplies the starter motor 213 with electrical energy. A generator 214 is used to chargebattery. An engine control system (EMS) 215 regulates the starter motor 213. Here one is requiredcoupling device 216 so that both batteries can be charged by the generator 214.
However, the system shown in Figure 2 has the disadvantage that quiescent currents dischargethe starter battery 230 through the engine control system 215. In addition, it is often implementedthe coupling device 216 in the form of a diode, which allows the energy from the power battery220 cannot be used to activate the starter motor 213.
Figure 3 schematically shows a dual battery system 300, where a power battery device320, comprising at least one power battery, is connected to an electrical system 310. Itthe electrical system 310 includes a starter motor 313 and abattery charging device, including a generator 314. As stated abovethe electrical system also includes electrical devices used when the engineis not running, e.g. heating systems for cabs 312, lamps 311 and the like.
In addition, the electrical system 310 includes a motor control system 315 whichcontrols the starter motor 313. In the dual battery system 300 is a starter battery device 330,1015202530comprising at least one starter battery, connectable in parallel with the power battery device320 using a dual circuit breaker 350. When the dual circuit breaker 350 is closed,consequently, the starter battery device 330 and the power battery device are connected in parallel320 so that they jointly supply the electrical system 310 with adual system voltage. When the dual circuit breaker 350 is open, supplythe power battery device 320 alone the electrical system 310 with electrical energy.
Accordingly, the dual circuit breaker 350 is used to regulate the electrical energy whichprovided to the electrical system so that the starter battery device 330 canprovide extra power when the stop motor 313 is to be activated.
In the dual battery system 300, the power battery device 320 is mainly used forto supply energy to the electrical units of the electrical system 310, whichused when the engine is not running. The power battery device 320 can therefore be optimizedwith respect to cycling capacity. Correspondingly usedthe starter battery device 330 mainly to supply power only tothe starter motor 313, and can therefore be optimized with respect to high starting power. One moreoptimized battery system can consequently be obtained.
When charging the power battery device 320 and the starter battery device 330 canthe dual circuit breaker 350 is used to connect and / or disconnectthe starter battery device 330 relative to the charging device, therethe charging device comprises the generator 314.
However, batteries age when used and age after a certain period of time.
This time period varies between different battery types and between different manufacturers.
The time period regarding a battery's aging also depends on how the battery is usedduring its active life. It is important that a driver or a vehicle orVehicle owners can determine the condition of the batteries, so that the driver or owner can changeremove the batteries before they endanger the operation of the vehicle or vehicle.In the prior art document US6534992,a method for determining the performance of a single accumulator battery is reported.
However, this method is very complex and impractical to use in a vehicle1015202530or a vessel, as advanced signal curve analysis must be performed over a period of timeregarding a voltage drop that occurs when a high current load is applied tothe single accumulator battery.In the prior art document US2007096743,a method regarding the determination of battery deterioration is also reported, where avoltage drop, due to a resistance in the battery that occurs as a result of the discharge,used in the determination. To obtain a correct determination mustthe discharge consists of a given fate from the battery to the load, which makes this methodcomplicated to implement and use.
Furthermore, none of the methods reported in accordance with the state of the art aredeveloped for use with dual battery systems. They therefore do not use themfeatures and capabilities available for dual battery systems. In additionboth of these methods require, in accordance with the state of the art, that the battery be dischargedto a load to be able to perform a determination of the battery condition. This caneither by an extra discharge, which is a waste of energy, or byanalysis of a real-time discharge, which requires synchronization of the determination methodregarding battery condition and discharge. Such synchronization exacerbatesof course the complexity of the implementation.
The reported methods in accordance with the state of the art consequently have onenumber of disadvantages. A major drawback relates to the complexity of the methods in accordance withstate of the art. The solutions in accordance with the state of the art are alsoimpractical in implementation, as discharging accessories are used.
This discharge equipment must be fitted to the vehicle, which increasesvehicle weight. The accuracy of these methods in accordance with the technologyposition is also insufficient for vehicles or vehicles equipped withdual battery system.lO15202530The purpose of the invention and most important functionsAn object of the present invention is to provide a method and aarrangements for determining the battery condition of a dual battery system which:solves the above problem.
The present invention aims to provide a method and aarrangements for determining battery condition, which provide a determination ofbattery condition that is reliable and has low complexity.
This object is achieved with the above-mentioned method for determining battery condition fora dual battery system according to the characterizing part of claim 1.
This object is also achieved with the above-mentioned arrangements for determiningbattery condition for a dual battery system in accordance with the characterizing partof claim 13.
The object is also achieved with the above-mentioned computer program and computer program product, whicharranged for implementation of the methods of the invention.
The method and arrangement in accordance with the present inventioncharacterized by a correlation between the aging of the power battery device andthe size differences between the dual system voltage and at least one of the power batterydormant voltage and the starting voltage of the starter battery are analyzed over time. Therebythe relative health condition of the power battery device can be easily determined, which is stated inrelation to the health condition of the starter battery device. The voltages required toperforming this determination can be easily measured over relatively long periods of time, whichentails a determination with very low complexity. These measured values, as well asdetermination, can also be performed during normal operation, since no separatedischarge is necessary.
The present invention utilizes the improved dual battery systemstarting properties to reduce complexity. In general, ensuresthe dual boot system's outstanding starting characteristics more or less thatlO15202530commissioning will be performed successfully and the engine will be started. Offor this reason, a determination of the state of charge regarding the batteries is notequally important for the dual battery system. In the present invention this is usedby determining the state of health over time, instead of performing an intricate andcomplex estimate of the current level of batteriesstate of charge. Because no discharge equipment is used by itIn the present invention, the invention is very practical and simple to useimplement in a vehicle.
Usually the condition of the starter battery device is relatively good. The power battery deviceRelative health conditions can therefore often be used directly to determine a more orless absolute measure of the health condition of the power battery device. An estimate ofthe absolute state of health of the power battery device can hereby be determined with a lowlevel of complexity, and with greater accuracy than with the methods in accordance withstate of the art.
In accordance with an embodiment of the invention, the starting battery device is determinedhealth condition, after which an absolute measure of the health condition of the power battery devicedetermined, based on the established health condition of the starter battery device andthe established relative health status of the power battery device. In this embodiment is achieveda very accurate and efficient determination of the battery condition.
If the starter battery device is not aged, the power battery device is considered, accordinglywith an embodiment of the present invention, mainly for the elderly at atime when the difference between said dual system voltage and the starting batteryrest voltage over time has decreased to about 0% -30% of the battery voltage difference,and preferably 0% -20% of the battery voltage difference.
Detailed typical embodiments and advantages of the method and arrangement inin accordance with the invention is described in the following with reference to the appendeddrawings showing some adequate designs.1015202530Brief description of the drawingsFig. 1 schematically shows a traditional battery system.
Fig. 2 schematically shows a battery system in accordance with the prior art.
Fig. 3 schematically shows a dual battery system.
Figs. 4a-d show voltage diagrams regarding four typical start-up situations.
Fig. 5 shows a fate diagram of a method in accordance with the present invention.
Fig. 6 schematically shows an arrangement in accordance with the invention.
Detailed description of preferred embodimentsIn a dual battery system, e.g. the one generally described in Figure 3, has boththe starter battery device 330 and the power battery device 320 a rest voltage whenthe dual circuit breaker 350 is open. Consequently, one is above the starter battery device 330rest voltage regarding the starter battery, and above the power battery device 320 is arest voltage regarding the power battery.
Through the present invention, it has been realized that the level of at leastone of the starting battery's rest voltage and the power battery's rest voltage togetherwith a dual system voltage, ie. the voltage of the starter battery device 330and the power battery device 320 together supply the system with whenthe two-circuit breaker 350 is closed, can be used to determinethe relative health condition of the power battery device 320. Consequently, an analysis canis performed by the voltage profile generated from the starter battery device 330 andthe power battery device 320 before and after closing the two-circuit breaker 350, respectively,which gives an accurate estimate of the relative of the power battery device 320state of health. The relative health condition of the power battery 320 is related abovetime to the health condition of the starter battery 330.
A relationship between the power battery device 320 and the starter battery device 330health condition can in other words and in accordance with the present inventionestablished by using an established dual system voltage and one orﬂ of the starting battery's rest voltage or the power battery's rest voltage. Usually canthe state of health of the starter battery device 330 is determined relatively easily, and therebyan absolute measure regarding the state of health can also be determined on the basis of the relationship1015202530the state of health of the power battery device 320 and the starter battery device 330, which isvery useful.
Figures 4a-d show generally adequate voltage diagrams regarding astart-up situation for four typical cases regarding power andthe starter battery device, which can be used to illustrate the inventionobservations. These voltage diagrams show the resting voltage 420 of the power batteryrespectively the resting battery 430 of the starter batterythe dual system voltage 410, which is the resulting voltage whichprovided to the electrical system 310 when the dual circuit breaker 350 is closed attime t1. In addition, the dual system voltage is displayed during start-up ofthe starter motor 440, i.e. after the time tg and before the time t3. Figures 4a-dillustrates probable examples of voltage diagrams for a well-balancedbattery system. As will be apparent to one skilled in the art, the balance of the battery systemdepending on the design of the system, and where the voltage levels and consequentlythe voltage diagrams would be shifted if one of the battery devices, e.g.power battery device, would be much more powerful in relation to the otherthe battery device, in such a way that the battery system is not well balanced.The illustrations of these voltages regarding the four cases in Figs. 4a-d comehenceforth to be used to explain the principles of the presentthe invention.
If we assume that the starter battery device 330 is in good condition, ie. it is inmainly fully charged and not aged, the various cases shown in Figures 4a-dbe used to determine the battery condition of the power battery device320.In the two clocks 4a-b, the power battery device 320 is relatively fully charged. Thisis illustrated in these ﬁ gures by a battery voltage difference, i.e. the voltage differencebetween the resting voltage 430 of the starter battery and the resting voltage 420 of the power battery, which isrelatively small.1015202530Figure 4a shows a case where the power battery device 320 is not aged, i.e. the leastone power battery is relatively new. As a result, when the dual circuit breaker 350 is closedat time t1, the dual system voltage 410 is at a level relatively close to the levelfor the resting voltage 420 of the power battery. If the power battery device 320 is not relativelyis aged, consequently constitutes a difference between the dual system voltage 410 andthe resting voltage 420 of the power battery a small part of the difference in battery voltage. Oncorrespondingly, for at least one not aged power battery, constitutes a difference betweenthe dual system voltage 410 and the resting voltage 430 of the starter battery a large part ofthe battery voltage difference.Figure 4b, shows a case where the power battery device 320 is relatively aged, i.e.the power battery device 320 has been used for a period of time. When batteries, andconsequently also the power battery device, is subjected to repeated powerfulenergy charges, ie. deep discharge, increases their internal resistance. In generalthe power battery device is discharged to a greater extent than the starter battery device.
The level of dual system voltage will approach more and more over timestarting battery rest voltage 430. As shown in Figure 4b, regarding a relatively agedpower battery device, is the difference between the dual system voltage 410 andthe resting voltage 420 of the power battery a large part of the battery voltage difference, and, oncorrespondingly, is the difference between the dual system voltage 410 andthe starting battery rest voltage 430 a small part of the battery voltage difference.In the two 4 clocks 4c-d are shown cases where the power battery device 320 is relatively poorcharged, i.e. relatively discharged. This is illustrated in these ﬁ gures by onebattery voltage difference, ie. the voltage difference between the resting voltage of the starter battery430 and the resting voltage 420 of the power battery, which is relatively large.Figure 4c shows a case where the power battery device 320 is relatively not aged. Offor this reason, the dual system voltage 410 is such that the difference betweenthe dual system voltage 410 and the starting voltage 430 of the starter battery are relatively large,i.e. the difference between the dual system voltage 410 and the starter batteryrest voltage 430 constitutes a relatively large part of the battery voltage difference.101520253010Figure 4d shows a case where the power battery device 320 is relatively aged. The differencebetween the dual system voltage 410 and the resting voltage 420 of the power batterytherefore a large part of the battery voltage difference, and, correspondingly, constitutesthe difference between the dual system voltage 410 and the rest battery 430 of the starter batterya small part of the battery voltage difference.
The present invention assumes that over time there is a clearcorrelation between the aging of the power battery device and the starting battery deviceand the magnitude difference between the dual system voltage 410 and the power batteryidle voltage and the idle voltage of the starter battery, respectively. About this correlationanalyzed over time, the health condition of the power battery device can consequently be determined.
Here, the established relative health condition of the power battery device is in relation tohealth condition of the starter battery. In accordance with the present inventionconsequently, this correlation is used to determine the power battery device 320relative health conditions.In accordance with the present invention, these observations are utilized in one methodfor determining the battery condition in a dual battery system. Figure 5 shows oneﬂ fate diagram regarding a method in accordance with the invention.In the first step of the method, at least one of the resting voltage 420 of the power battery is determinedrespectively the resting battery 430 of the starter battery when the two-circuit breaker is open, i.e. beforetime t1.In the second step of the method, the dual system voltage 410 is determined for a period of timewhen the two-circuit switch is closed and the starter motor is inactive, ie. the time period betweenthe times t1 and tg.
In the third step of the method, the relative health condition of the power battery device is determinedby utilizing the determined dual system voltage 410 and at least one of thedetermined resting voltage of the power battery 420 and the resting voltage of the starting battery, respectively430.1015202530llThe method of the present invention utilizes the realized correlation betweenthe aging of the power battery device and the levels of the dual system voltage 410and at least one of the starting battery's rest voltage 430 and the power battery, respectivelyrest voltage 420 to determine the battery condition of the power battery device. The method iin accordance with the invention provides a determination of battery condition that isefficient and has low complexity, and which is specially adapted fordual battery system.
Above all, the voltages used in the determination can be easily provided,because they can be measured during relatively long time windows. As described above canthe resting voltage 420 of the power battery is measured for a long period of time before the time t1,and the starting voltage 430 of the starter battery can be measured for a long period of time betweenthe times t1 and tg. Consequently, there is no need for specific currentswhich ﬂ surface through loads or to synchronize voltage measurements withbattery discharges, which is necessary with the solutions in accordance with the technologyposition, which in turn makes the method of the present invention much smallercomplex.
In accordance with an embodiment of the invention, the resting voltage of the power battery is determined420 and / or the resting battery 430 of the starter battery by performing an estimate ofthe voltages or by calculating an average value of the voltages. As isobvious to a person skilled in the art can these estimates and averagesperformed in a number of different ways.In accordance with an embodiment of the present invention, a first is formeddifference as the difference between the dual system voltage 410 and the starter batteryresting voltage 430. This first difference is used to determinethe relative health condition of the power battery device by utilizing the method the firstthe difference varies overtime. The determination of the state of health includes hereconsequently an analysis of the varying magnitude of this first difference, from whichconclusions can be drawn, which is explained below.101520253012In accordance with another embodiment of the present invention, they are instead discardedthe first difference as the difference between the dual system voltage 410 andthe resting voltage of the power battery 420. Here too, this first difference is used todetermine the relative health status of the power battery device by analyzing the methodits size varies over time.In accordance with an embodiment of the invention, it is concluded thatthe health condition of the power battery device deteriorates relative to that of the starter battery devicestate of health when this analysis of the varying magnitude of this first difference shows thatthe difference between the dual system voltage 410 and the rest battery 430 of the starter batterydecreases over time. If during ﬂ are consecutive measurements ofthe dual system voltage 410, the resting voltage of the power battery 420, and the starting batteryrest voltage 430 during ﬂ your consecutive start-up activations, wherethe first difference regarding the subsequent decreases over time for these onconsecutive activation activations, it can be determined thatthe health condition of the power battery device deteriorates more and more in relation tohealth condition of the starter battery.
Because the starter battery device is generally only used to startthe starter motor, i.e. the two-circuit breaker is closed just before starting, isthe starter battery device is generally more or less fully charged.
The health condition of the starter battery device is also generally good, as thesebatteries are usually replaced if their health condition deteriorates. The power battery deviceRelative health conditions can therefore often be used directly to determine a more orless absolute measure of the health condition of the power battery device, due tothe relative health condition of the power battery device is related tohealth condition of the starter battery. Using this measure of low complexitywith which the relative health condition of the power battery device is determined, avery good estimate of the absolute health condition of the power battery devicedetermined.
An established health condition regarding the starter battery device can be used todetermine when it is time to replace the starter battery device in a dual battery system.101520253013In accordance with an embodiment of the invention, this set is also usedhealth condition regarding the starter battery device for determining an absolutehealth condition regarding the power battery device. Based on the starter battery devicehealth condition and the established relative health condition of the power battery device, canconsequently, an absolute measure of the health condition of the power battery device is determined. Ifthe health condition of the starter battery device has already been determined can consequentlythe relative health condition of the power battery device, which relatesthe health condition of the power battery device to the health condition of the starter battery device,be used to effectively determine the absolute dimension of the power battery devicehealth condition, in such a way that a warning can be issued in good time before a power batterybecomes unusable.
In accordance with an embodiment of the present invention, it is determinedthe health condition of the starter battery device by using one or ﬂ eraparameters regarding the starter battery device. Analysis of at least onecharging process parameters, e.g. a charging time, a charging voltage, and acharging current used when charging the starter battery device can be usedfor determining the health condition of the starter battery device. In general, the vehicleor the vessel has access to, or may be provided with, a function for storing, informationrelating to such charging process parameters. This pending or storedinformation can be easily used for such a determination ofhealth condition of the starter battery.Analysis of at least one temperature parameter regarding the starter battery device is also possiblebe used to determine the health status of the starter battery device. In some vehicleor vehicle system, the temperature ratio is measured or estimatedthe starter battery device. Such temperature conditions can be measured in a number of different waysway, which is obvious to a person skilled in the art, e.g. by using temperature sensorswhich provide temperature-related signals. The temperature can alsoestimated, where the estimate is based on a battery model used asstarter battery device. These measurements and / or estimates can be easilyprovided to the device that determines the health status of the starter battery device.101520253014In accordance with an embodiment of the invention, one is measured and / or estimatedtemperature parameters for each of the starter battery device andthe power battery device. For some implementations, it can be assumed thatthe starter battery device and the power battery device have essentially the sametemperature, or a substantially known or estimated temperature difference. Thesetemperature relations between the starter battery device and the power battery device canis used to determine the temperature of one of the starter battery devicesand the power battery device when the other has been measured or estimated.Also analysis of at least one startup process parameter, e.g. a starting voltage, a time consumptionfor start-up, a start-up speed, and an engine temperature,can be used to determine the health condition of the starter battery device. l todayvehicles or vehicles are usually measured such start-up process parameters which consequentlyare available for use by a device that determines the starter battery devicehealth conditions, which results in an implementation with low complexity.Also analysis of at least one discharge process parameter, e.g. a discharge time, anda discharge current used in discharging the starter battery device, maybe used to determine the health status of the starter battery device.
In accordance with an embodiment of the present invention, the analysis is performed by aor ﬂ your parameters over time. What is detected is consequently the tendency regardingthe health condition of the starter battery device, ie deterioration of health overtime.
If a severe deterioration is detected in this way, which means thatthe health condition of the starter battery has deteriorated, this is an indication thatit is time to replace the starter battery device. This indication should be indicated tothe driver and / or service personnel in any suitable manner, which is obvious to oneprofessional.
If the starter battery device is replaced, the replacement device will have an effect on a numberparameters which affect the determination of the battery condition. The determination ofthe battery condition is consequently renewed after such a change. To be able to determine onereliable determination even after the change, certain parameters are reset, e.g.101520253015determining the health status of the starter battery device over time, to appropriatedefault values or at least adjusted to appropriate values.
About the health condition of the starter battery device, in accordance with an embodiment of itthe present invention, is established as satisfactory, ie. when the starter battery deviceis not aged, the power battery device is considered, mainly for aged at atime when the difference between said dual system voltage 410 andthe starting battery's rest voltage 430 over time has decreased to about 0% -30% ofthe battery voltage difference, and preferably 0% -20% of the battery voltage difference. Herein the same way as above, the difference in battery voltage is the difference betweenthe starting battery's rest voltage 430 and the power battery's rest voltage 420. l in generalapplies that the closer the dual system voltage 410 is in relation tostarting voltage 430 of the starter battery, the worse the condition of the power battery device.
This is also illustrated in Figures 4b and 4d which refer to the elderlypower battery devices. As stated above, these values are regarding the differencebetween the dual system voltage 410 and the resting battery 430 of the starter batteryof how well-balanced the system is.
If the power battery device, in accordance with an embodiment of the invention, is determinedhave a deteriorating state of health, ie. when the power condition of the power battery device hasdeteriorated to a very low level, this should be interpreted as an indication that it istime to replace the power battery device. As will be apparent to one skilled in the art, one maysuch indication is indicated to the driver and / or service personnel in a variety of numbersdifferent ways. If the power battery device is replaced, the battery condition should be determinedrestored after the change. Through this reset, certain parameters are reset, e.g.determining the health status of the starter battery device over time, to appropriatedefault values or at least adjusted to appropriate values, so as not tonullify the determination of the battery condition.
The invention is implemented in an arrangement for determining onebattery condition in a dual battery system. As stated above in connection with Figure 3,the dual battery system 300 includes a power battery device 320 that is connected toan electrical system 310 including a starter motor. Dual battery system 300101520253016also includes a starter battery device 330 that can be connected in parallel withthe power battery device 320 by means of a two-circuit switch 350, wherebythe power battery device 320 and the starter battery device 330 supply the electricalsystem 310 with a dual system voltage 410.
Figure 6 schematically shows an arrangement 600, comprising a processor device601 which performs a number of different calculations and determinations, in accordance withthe explanation below. The arrangement also includes a first voltage determinationdevice 602, which is arranged to determine at least one of a power batteryidle voltage 420 and the idle voltage 430 of a starter battery, respectively, when the dual circuit breaker isopen. The first voltage determining device 602 may e.g. include twovoltmeter units, each unit being arranged to determine the quiescent voltageover the power battery device and the starter battery device, respectively.
The arrangement 600 also includes a second voltage determining device 603,which is arranged to determine the dual system voltage 410 whenthe two-circuit breaker is closed. The second voltage determining device 603 canfor example include one or more of your voltmeter units.
The arrangement 600 may also include an input unit 604 which providesthe processor device 601 with various information. Such information includesinformation such as refers to in case the dual circuit breaker 350 is open or not, ifthe starter motor is active or not, and the like, and which can be used bythe processor device 601.
The processor device 601 includes a first state of health determinationdevice, which is arranged to utilize the determined dual system voltageand at least one of the resting voltage determined by the power battery and the starting battery, respectivelydetermined rest voltage to determine the relative of the power battery devicestate of health. As stated above, the relative state of health over time relates tohealth condition of the starter battery.lO1520253017According to an embodiment of the invention, the processor device also comprisesa second health condition determining device, which is arranged to determinehealth condition of the starter battery. The processor device also includes ahealth condition determining device for absolute health condition, which isarranged to determine, at a time, an absolute measure ofthe health condition of the power battery device, on which the absolute determination is basedthe health condition of the starter battery device and the relative strength of the power battery devicestate of health.
In accordance with one embodiment of the present invention includesthe arrangement also one or ﬂ your devices for parameter determination. One orﬂ one of the following parameter determining devices supplies the input unit here604 with parameters; a device for determining at least onecharging process parameter, a device for determining at least onetemperature parameter relating to the battery device, a device for determiningat least one start-up process parameter, and a device for determining at least onedischarge process parameters.
As will be apparent to one skilled in the art, the arrangement 600 of the invention can be adaptedto include devices for performing any of the steps in the method of the invention.
An obvious condition is of course that the event is provided with informationnecessary to perform such a step.
The devices included in the processor device, i.e. the first and secondvoltage determining device, the first and secondthe health-determining device, and the health-determining devicethe device of absolute health, may consist of different physical orlogical parts of the processor device, e.g. different sub-circuits belonging to the same circuit,different parts of a programming code, or different executions of the sameprogramming code.
The connectors 612, 613, and 614 in Figure 6 may each be either one of thecable group; a bus, e.g. and CAN bus (Controller Area Network), and MOST-lO1518bus (Media Orientated Systems Transport) or equivalent, alternatively a wirelessconnection. The processor device 601 may be located adjacent to the cabor in principle in any part of the vehicle.
The invention method can be implemented in a computer program, includingprogram code, which when executed on a computer causes the computer to execute the methodstep. The computer program is included on a machine readable medium belonging to onecomputer software product. The machine-readable medium can mainly consist of whichany type of memory, such as ROM (Read-Only Memory), PROM(Programmable Read-Only Memory), EPROM (Erasable PROM), Flash memory,EEPROM (Electrically Erasable PROM) or a hard disk.
As will be apparent to those skilled in the art, a number of other implementations,modifications, variations and / or additions are made to the typical embodiments such asdescribed above. It should be noted that the invention encompasses allsuch other implementations, modifications, variations and / or additions ascovered by the requirements.

权利要求:
Claims (13)
[1]
A method for determining battery condition in a dual battery system, wherein said dual battery system comprises: - a power battery device connected to an electrical system 310 comprising a starter motor, and - a starter battery device connectable in parallel with said power battery device by means of a dual circuit breaker, wherein said power battery starter battery device supplies the electrical system with a dual system voltage when said two-circuit breaker is closed, characterized in that the following steps are performed during a period of time when a starter motor is inactive: - determining at least one of a power battery's rest voltage and a starter battery's rest voltage, when said two-circuit breaker is open, determining said dual system voltage, when said two circuit breaker is closed, and - utilizing said dual system voltage and at least one of the resting voltage determined by said power battery and said resting voltage determined by said starter battery for determining said relative health condition of said power battery device, wherein said relative health condition is related over time to the health condition of said starter battery device which is assumed to be in good condition, a size variation over time regarding a first difference being used to determine said relative health condition of said power battery device, and wherein said first difference is between said dual system voltage and said rest battery voltage, and where the relative health condition of said power battery device is considered to deteriorate relative to said starter battery relative health condition if said first difference varies in such a way that a difference between said dual system voltage and said starter battery rest time.
[2]
A method according to claim 1, wherein a size variation over time regarding a first difference is used to determine said relative health condition of said power battery device, wherein said first difference is a difference between said dual system voltage and said resting battery rest voltage. 10 15 20 25 30
[3]
A method according to any one of claims 1-2, further comprising the steps of: determining the health condition of said starter battery device, and determining an absolute measure of the health condition of the power battery device, at a time and based on said health condition of said starter battery device and on said power battery device. said relative health condition.
[4]
A method according to claim 3, wherein determining the said health condition of said starter battery device comprises utilizing at least one starter battery device parameter in the group: ~ at least one charging process parameter; - at least one temperature parameter regarding the starter battery device; - at least one start process parameter; and - at least one discharge process parameter.
[5]
A method according to claim 4, wherein said utilization of said at least one parameter is performed over time, in such a way that a deterioration over time of said starting condition of said starter battery device.
[6]
A method according to any one of claims 3-5, wherein said power battery device is considered substantially aged at said time if, when said starter battery device is in good health, said difference between said dual system voltage and said starter battery rest voltage decreases to about 0% -30 % of the battery voltage difference, and preferably 0% -2O% of said battery voltage difference, wherein said battery voltage difference consists of a difference between said starting battery resting voltage and said power battery resting voltage.
[7]
A method according to any one of claims 3-5, wherein a determined deteriorating health condition of at least one of said starter battery device and said power battery device is interpreted as an indication that it is time to replace at least one of said starter battery device and said power battery device, respectively. 10 15 20 25 30
[8]
A method according to any one of claims 1-7, wherein said determination of battery condition is renewed if at least one of said starter battery device and said power battery device is replaced.
[9]
Computer program, characterized by program code, which when executed in a computer causes the computer to perform the method according to any one of claims 1-8.
[10]
A computer program product comprising a machine readable medium and a computer program according to claim 9, wherein said computer program is included in the machine readable medium.
[11]
An arrangement for determining a battery condition in a dual battery system, wherein said dual battery system comprises: - a power battery device coupled to an electrical system 310 comprising a starter motor, and - a starter battery device connectable in parallel with said power battery device by means of a dual circuit breaker, said said starting battery device supplies the electrical system with a dual system voltage when said two-circuit breaker is closed, characterized by - a first voltage determining device, arranged for determining at least one of a power battery rest voltage and a starting battery resting voltage, when said two circuit breaker is open, - arranged for determining said dual system voltage, when said two-circuit breaker is closed, - a first state of health determining device, which is arranged to utilize said dual system voltage and at least one of nine said resting voltage of said power battery and the determined resting voltage of said starter battery for determining the relative health condition of the power battery device, wherein said relative health condition is related over time to the health condition of said starting battery device.
[12]
An arrangement according to claim 11, wherein said arrangement comprises - a second health condition determining device, which is arranged to determine said health condition of said starter battery device, and - a health condition determining device for absolute health condition, which is arranged to, in a time, determining an absolute measure of said health condition of said power battery device, based on said health condition of said starter battery device and said relative health condition of said power battery device.
[13]
An arrangement according to claim 11, wherein said arrangement comprises at least one device in the group: - a device for determining at least one charging process parameter; a device for determining at least one temperature parameter regarding the battery device; - a device for determining at least one start-up process parameter; and - a device for determining at least one discharge process parameter.

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同族专利:

公开号 | 公开日

BRPI1002620A2|2012-03-27|

EP2290388B1|2015-09-23|

EP2290388A3|2014-05-21|

SE534537C2|2011-09-27|

BRPI1002620B1|2020-11-17|

EP2290388A2|2011-03-02|

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法律状态:

优先权:

申请号 | 申请日 | 专利标题

SE0950610A|SE534537C2|2009-08-26|2009-08-26|Determination of battery condition|SE0950610A| SE534537C2|2009-08-26|2009-08-26|Determination of battery condition|

EP10168649.1A| EP2290388B1|2009-08-26|2010-07-07|Battery condition determination|

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