• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An electrical system in a motor vehicle (1) comprises a power battery (2), a starter battery (3) connected thereto in parallel, a generator (7) and consumers of electrical energy comprising a starter motor (8) connected between opposite poles (4, 5). at 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 in connection with a certain degree of discharge of the starter battery has taken place after the end of the engine start procedure. fulfilled. (Fig. 1).
    公开号:SE1351493A1
    申请号:SE1351493
    申请日:2013-12-13
    公开日:2015-06-14
    发明作者:Gunnar Ledfelt；Ninos Poli
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    BACKGROUND ART An electrical system of an initially defined type 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.
    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 relatively previously [(arida such electrical systems and methods).
    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.
    By completing the engine start-up procedure, as the switch is closed and the starter battery is connected to the power side of the power battery and thus to the generator for possible recharging of the starter battery, supply 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 by said Consumer is charged with a 4 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 procedure, then the switch may be closed to allow for unwarrant recharging of the starter battery.
    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 when after completion of the engine start procedure current has continuously flowed 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 have been filled before the switch is opened to protect the starter battery, it is avoided to be opened due to flakes in the nearest instantaneous oscillation, 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.
    According to another embodiment of the invention, the electrical system comprises a unit designed that upon 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 calculates the time integral of that current, and the device is designed to control said switch to open when 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 battery 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 during a for a long time does this and is weak. It can be guaranteed that the starter battery is maximally discharged with a charge that corresponds to the said predetermined level.
    According to another embodiment of the invention, the electrical system comprises a device designed to calculate a value for the degree of charge of the starter battery after completion of the motor starting procedure 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.
    According to a further development of the latter embodiment, said device is designed to determine in its calculation of a value for the degree of charge of the starter battery that the starter battery is to be regarded as fully charged in case the current supplied by said means in said current wave from the consumer side towards the starter battery for a predetermined period. such as, for example, at least five 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. 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. 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.
    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 a drilling value from the value of the determined temperature for the voltage across the power battery, a device designed to calculate a value of the starting 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 to the power battery and a means designed to compare the calculated drilling value of the voltage with said charged voltage and in which 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 said rated 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. This ensures that after the switch has been reached due to the risk of the starter battery being discharged too much due to such a large load on the electrical system that the generator does not form alone can 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 7 by the generator to a voltage at essentially the same level as the drilling value gets the voltage and thus conditions are available to charge the starting battery.
    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 above description of the electrical system according to the invention.
    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.
    Additional advantages and advantageous features of the invention will become apparent from the following description.
    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 Fig. 3 is a diagram showing the load on 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 may illustrate different embodiments of the invention. Fig. 4 is a river diagram illustrating a method according to an embodiment of the invention, and Fig. 4 is a schematic diagram of an electronic control unit for implementing a method according to the invention.
    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 battery's pada poles 4, 5 is normally about 24 V.
    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 pointed out that a number of components of the vehicle (not shown), which require the supply of electricity, are connected to the electrical system on the consumer side 6 of the power batteries 2.
    The electrical system further has a switch 10, which via a device 11 in the form of a circuit board can be controlled via two signals S1, S2 indicated by dash from relays, of which the signal S1 is intended to derive from a maneuvering of an ignition key or the like of the vehicle for starting its engine and then via the device 11 control the switch 10 to be stopped 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 S2 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.
    The system also comprises schematically indicated means 12 designed to feed the current through the switch 10 and means 13 designed to feed the time the current through the switch has one and the same direction. A means 14 is arranged to supply the voltage between the power packs 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 for producing 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 current which continuously flows in the current path from the starter battery towards the consumer side after completion of the engine start procedure and a device 17 designed to calculate a value after completion of the engine start procedure. for the degree of charge of the starter battery and compare this value with a value corresponding to the fully charged starter battery.
    Fig. 2 illustrates a possible development of the current I flowing in said current path. Over 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 should be considered fully charged in the if the current supplied by means 12 in said current wave for a predetermined period of time, such as at least five 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 means 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 next time.
    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.
    An engine start takes place at time t0 and d5 the device 11 controls the switch 10 to close for activating the starter motor 8 through 11 which the starter batteries become partially discharged and warp a current I flows from the power side of the power battery to the starter batteries for charging them. At time ten, very briefly, the load on the electrical system suddenly exceeds what the generator is intended to generate, which means that current will also flow from the starter batteries to supply the electrical system consumers 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 starter batteries 3 will to continue.
    At time t2 again an "overload" of the electrical system occurs, and this time this load peak L2 lasts considerably longer, and when said time integral of current I in the wrong direction in current current night said predetermined level controls device 11 to switch , which occurs at time t3.
    At time t4, any load from the consumer of the electrical system drops below the G what the generator is designed to deliver and this then begins to charge the power batteries which during the time between t3 and t4 have had to assist the generator in supplying electrical energy to the consumers. The voltage measured via the means 14 is compared with a drilling value of the voltage calculated from information on the temperature of the power batteries, and when the comparison shows that the voltage across the power batteries is up to substantially the same level as said drilling value, the device 11 controls the switch 10 to close again. occurs at time t5. As a result, the charging of the starter batteries continued. At time 12 t6 a new load peak L3 occurs, but this time it is only insignificant at 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 te and t7 will be below predetermined level, so that the switch 10 is kept closed and charging of the starter batteries is continued after time t7 and then terminated at time ts 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 the time take, the switch 10 will then be held in the Open spirit until an engine start is to be carried out again.
    Fig. 4 shows a river diagram illustrating a method according to an embodiment of the invention for voltage regulation 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 goes over to step S5, in which the current flowing between the starter battery and the power battery consumer side 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 asked in step S6 is yes, in step S7 the starter battery is disconnected from the power battery. the starter battery against further discharge. However, the answer to these questions in step S6 is no, as the starter battery is still connected to the power side of the power battery. Computer program code for implementing a method according to the invention is suitably included in a computer program which can be loaded 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 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.
    The invention is of course not in any way limited 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.
    权利要求:
    Claims (16)
    [1]
    An 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 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, 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 stop when activating the starter motor (8) for starting the engine of the vehicle to supply maintain a current path between the starter battery and the consumer side (6) of the power battery, and thereby power to the starter motor, characterized in that it also comprises means (12) made to supply the current through said switch (10), and that the device (11) is designed to, after completion of the engine start procedure, direct the switch to open as soon as a condition arises in connection with a certain degree of discharge of the starter battery (3). the completion of the engine start procedure is met. 16
    [2]
    Electrical system according to claim 1, characterized in that it comprises a means (13) designed to supply the time the 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 completion of the engine start procedure, current has continuously flowed in said current path from the starter battery (3) towards said consumer side (6) for a certain time, such as at least 10 seconds.
    [3]
    Electrical system according to claim 1, characterized in that it further comprises a unit (16) designed to calculate the time integral when a current which, after completion of the engine start procedure, continuously flows in said current path from the starter battery (3) to said consumer side (6) 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]
    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]
    Electrical system according to claim 4, characterized in that said device (17) is designed to determine in its calculation of 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). ) charged the current in said current wave from the consumer side towards the starting 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]
    Electrical system according to claim 4, characterized in that said device (17) is designed to, in 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) drops 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 falls below said predetermined value for the speed.
    [7]
    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 a bar value from the value of the determined temperature for the voltage across 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 across the power battery (2) and a means designed to compare the calculated drilling value of the voltage with said applied voltage and in the 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 regarded as fully charged closing the switch in in that case said applied 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 at the voltage.
    [8]
    A method for voltage control of an electrical system designed to be arranged in a motor vehicle (1) and comprising a power battery (2), a starting battery (3) connected in parallel with the power battery and a generator (7) and consumers of electrical energy comprising a starter motor (8) connected between opposite poles (4, 5) has 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 keeping a current path between the starter battery and the consumer side of the power battery broken and said current path closing when activating the starter motor (8) for starting the vehicle's engine, characterized in that it comprises the steps of feeding the current in said current path, and break the said current path as soon as after the end of the engine start procedure a condition which is in connection with a certain degree of discharge of the startb the atterium (3) has taken place after the end of the engine start procedure is fulfilled.
    [9]
    A method according to claim 8, characterized in that it comprises the steps of: 19 feeding the current in said current path having one and the same direction, and breaking said current path when after completion of engine start procedure current has continuously flowed in said current path from the starting battery (3) towards said consumer page (6) for a specified time, such as 10 seconds.
    [10]
    A method according to claim 8, characterized in that it comprises the steps of: calculating the time integral of said current upon breaking a current which continuously flows in said current path from said starter battery (3) towards said consumer side (6) towards said consumer side (6), and breaking said current. current wave when the said time integral of the current exceeds a predetermined level, such as 0.1 Ah.
    [11]
    A method according to any one of claims 8-10, characterized in that it comprises the steps of: calculating, after completion of the engine starting procedure, a value for the degree of charge of the starter battery (3), comparing the calculated value with a value corresponding to a fully charged starter battery, and breaking 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]
    A method according to any one of claims 8-11, characterized in that it comprises the steps of: determining, after completion of the engine start procedure, the temperature of the power battery (2), calculating a drilling value for the voltage across the power battery from the value of the measured temperature, calculating 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, supply the voltage across the power battery (2), compare the calculated drill bit of the voltage with said supplied voltage, and close said current path 3) as a result of said comparison is not to be considered fully charged and said charged voltage is substantially equal to said drill value of the voltage, which meant that it is at least 95% or at least 98% of the drill value of the voltage.
    [13]
    A computer program that is loadable directly into the internal memory of a computer, which computer program comprises computer program code for causing the computer to control the steps according to any of claims 8-12 of said computer program [cars on the computer.
    [14]
    A computer program product comprising a durable data storage medium that is readable by a computer, the computer program code of a computer program according to claim 13 being stored on the data storage medium.
    [15]
    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 permanent data storage medium (21) connected to the execution means, wherein the computer program code of a computer program according to claim 13 is stored on said data storage medium (21).
    [16]
    Motor 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. lilt F; 3 1 F152 2 / 2i. pl 3 Starter activation request Connection of starter battery to Consumer side of power battery Activation of starter motor Engine start procedure completed Si S2 S3 S4 Yes Power supply between starter battery and power battery consumer 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 Yes Free connection of the starter battery from the power battery's Consumer side Fro Li- S6 F
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    同族专利:
    公开号 | 公开日
    SE537877C2|2015-11-10|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    NZ264225A|1994-08-11|1998-07-28|Glorywin Int Group Ltd|Vehicle battery switch with state of charge sensing circuit|
    GB2302622B|1995-06-22|2000-03-29|Glorywin Int Group Ltd|Battery controller|
    FR2749814B1|1996-06-14|1998-07-31|Renault|ELECTRIC POWER SUPPLY DEVICE FOR A MOTOR VEHICLE|
    SE514786C2|1998-09-02|2001-04-23|Scania Cv Ab|Electrical system for motor vehicles with dual batteries|
    DE19951128A1|1999-10-23|2001-04-26|Bosch Gmbh Robert|Method and device for voltage regulation|
    DE10055076A1|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|2006-08-10|2008-02-21|Nissan Motor Co Ltd|Battery pack system|
    SE534891C2|2009-06-09|2012-02-07|Scania Cv Ab|Determination of charging time|
    SE535351C2|2010-11-01|2012-07-03|Scania Cv Ab|Activation device and activation method for a dual battery system|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1351493A|SE537877C2|2013-12-13|2013-12-13|Dual battery system for motor vehicles and method of voltage regulation of such|SE1351493A| SE537877C2|2013-12-13|2013-12-13|Dual battery system for motor vehicles and method of voltage regulation of such|
    PCT/SE2014/051442| WO2015088425A1|2013-12-13|2014-12-03|Electrical system for motor vehicles and method for voltage regulation of such|
    EP14870037.0A| EP3080893A4|2013-12-13|2014-12-03|Electrical system for motor vehicles and method for voltage regulation of such|
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