DE102009007545A1 - Boot Helper - Google Patents

Boot Helper

Info

Publication number
DE102009007545A1
DE102009007545A1 DE102009007545A DE102009007545A DE102009007545A1 DE 102009007545 A1 DE102009007545 A1 DE 102009007545A1 DE 102009007545 A DE102009007545 A DE 102009007545A DE 102009007545 A DE102009007545 A DE 102009007545A DE 102009007545 A1 DE102009007545 A1 DE 102009007545A1
Authority
DE
Germany
Prior art keywords
voltage
starting
memory
characterized
vehicle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
DE102009007545A
Other languages
German (de)
Inventor
H.-P. Prof. Dr.-Ing. Beck
André Dipl.-Ing. Haubrock
Heinz Dr. rer.nat Wenzl
Original Assignee
Wenzl, Heinz, Dr.
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 Wenzl, Heinz, Dr. filed Critical Wenzl, Heinz, Dr.
Priority to DE102009007545A priority Critical patent/DE102009007545A1/en
Publication of DE102009007545A1 publication Critical patent/DE102009007545A1/en
Application status is Pending legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02NSTARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00Starting of engines by means of electric motors
    • F02N11/08Circuits or control means specially adapted for starting of engines
    • F02N11/0862Circuits or control means specially adapted for starting of engines characterised by the electrical power supply means, e.g. battery
    • F02N11/0866Circuits 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02NSTARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00Starting of engines by means of electric motors
    • F02N11/08Circuits or control means specially adapted for starting of engines
    • F02N2011/0881Components of the circuit not provided for by previous groups
    • F02N2011/0885Capacitors, e.g. for additional power supply

Abstract

In a starting assistance system (10) for a vehicle, comprising at least one circuit breaker, in particular semiconductor switch (7, 13), at least one internal starting assistance memory (2) is provided with a predetermined nominal voltage, wherein the internal starting assistance memory (2) for assisting in the power demand during the starting process to the starter battery (12) of the vehicle is connected in parallel or switched. In a method for jump starting in a vehicle, the vehicle electrical system voltage is measured when connecting one or the jump start system to the electrical system of a vehicle, a control logic (1) of the start assist system is supplied with power, the time of switching on the voltage of the start help memory (2) from the Clamping measured vehicle supply voltage is reduced, calculated by a voltage jump of n volts, and the voltage supply is interrupted when the vehicle electrical system voltage rises above a predetermined voltage (U2).

Description

  • The The invention relates to a start-up assistance system for a vehicle, comprising at least one power switch, in particular semiconductor switch, and a method for jump starting in a vehicle.
  • In the breakdown statistics of the ADAC are batteries that are unwilling to start all-winter in the first place. Almost 850,000 times had the ADAC road watch driver jump-start last year because of discharged or defective batteries - and that not only in older cars. To be used in usually relatively large and heavy starting aids, which are equipped with a lead acid battery. For a mobile application, these devices are therefore limited suitable. Also, these types of jumpers can usually not fast over the electrical system of a vehicle be reloaded.
  • In the prior art, for example, a portable multi-purpose starter from the DE 20 2007 004 272 U1 known. This has a housing for receiving a rechargeable battery, wherein in the housing electrical connection elements for connecting the battery are provided with provided in the housing electrical components.
  • From the DE 299 09 348 U1 is a portable battery energy storage with an integrated inverter and a grid-independent recharging, which can be recharged by means of solar and / or wind generators known.
  • The DE 199 51 094 C2 discloses a method and a device for securing a network containing a battery against reverse polarity, short circuit and / or overvoltage, wherein a reduced current flow detected by a Fremdstartstützpunkt to the battery and only in the case of compliance with predetermined limits, a direct connection of the Fremdstartstützpunktes to the battery and the electrical system is made.
  • The DE 100 49 321 A1 discloses a device for external power supply to a motor vehicle for powering electrical consumers that are connected internally to a power storage of a motor vehicle electrical system, wherein an inductive receiving device in the vehicle and an inductively from the outside inductively current coupling device are provided.
  • Another system to jump start is from the US 6,212,054 B1 known. This system can detect a wrong connection and thereby avoid the danger of battery exploding due to pole reversal. The system includes a switch that turns the power on and off. The system automatically detects a wrong polarity of the connected cables via its terminals and disconnects them from the power supply, if a wrong polarity is detected. Furthermore, the terminals are also de-energized when the cables are disconnected from them.
  • At the Starting process of a vehicle are currents of several hundred Amperes required, for example, of over 1,000 A at large diesel car and over 2,000 A in truck engines and other big engines. Immediately at the start of the boot process when the starter motor is stationary, the starter battery is almost in short circuit operated and the battery current is essentially through the ohmic Winding resistance is limited until the rotation of the starter build up a counter tension. The thereby adjusting current amounts about 30-50% of the peak current. Through the compression processes In the internal combustion engine, large power fluctuations result. Typically, a boot does not take more than three Seconds. The required amount of charge is often around 1,000 As and the amount of energy depending on the voltage under 10,000 Ws. The in the first 0.5 seconds, so at the beginning of the starting process required peak current Often also from an aged battery or a Battery to be delivered with very low capacity. The then flowing for about 1 to 2 seconds On the other hand, electricity can come from an aged or heavily discharged battery no longer be delivered, especially not when the temperature the battery and / or the engine is very low.
  • The requested electric power of the starter is on the one hand of the type of internal combustion engine, ie displacement, petrol / diesel engine, etc., and on the other hand, the environmental conditions, such as the temperature, the oil, the previous resting phase, etc., depending. Furthermore, the electrical resistances be taken into account between battery and starter terminals.
  • These explanations make it clear that when designing a starting aid or starting aid system it is not the energy content of the memory which is decisive, but its performance or its high-current behavior. For this reason, it has also been proposed to use instead of batteries as energy storage double-layer capacitors whose performance is very high for a few seconds, and their energy content is low, but still sufficient. A high performance also offers the possibility of bringing the memory back to a high state of charge within a few seconds, directly after the startup aid has been completed, in order to provide sufficient energy for subsequent starting processes To have available.
  • at modern vehicles may have a lower limit voltage during the starting process is not fallen below, so that the engine control yet remains functional. The electrical system voltage must therefore also during startup constantly above this Limit value are. In addition, the battery is on some vehicles already before starting for a few seconds a high Power for some functions required for startup taken, such. B. over 100 A for preheating a diesel engine or about 50 A for the engine control unit and other controllers.
  • It is known that basically the maximum power, which are discharged by batteries and double-layer capacitors can, then is reached when the internal resistance and the load resistance are the same size. Here, however, it should be noted that in particular For batteries, the internal resistance depends on the current. This means that the higher the current, the lower will be the internal resistance. Furthermore, the internal resistance changes during the boot process. The differences of internal resistance are of the age of the battery and the meaning of diffusion and diffusion Transport processes dependent. these can significantly increase the internal resistance within one second. In addition, the resistance of the starter (load resistance) is decisive from the induced by induction counter tension of the starter motor influenced, which in turn is speed-dependent. Furthermore this is due to the fluctuating torque requirement of the internal combustion engine influenced in the compression and expansion phases. It is thus not possible, the battery during the Starting operation always operate at the point of maximum power output. It is also between the point of maximum power output at the start of the boot process and during the boot process to distinguish.
  • at Start of the starting process is the load resistance of the starter in Standstill given by the ohmic resistance of the windings and very low (in the range of about 2 milliohms to 5 milliohms). The Battery is thus almost in short circuit at the start of the boot process operated and the terminal voltage is well below the rated or operating voltage.
  • While the starting process is at the for the engine start required speed of the starter produced by induction Counter voltage converted into a current-dependent or speed-dependent load resistance approx. 10 to 50 milliohms (mΩ) and is thus much higher than at the beginning of the boot process. The maximum power of the battery used could then be removed when the internal resistance of the battery in the each flowing currents the load resistance, So the resistance of the starter during the startup corresponds. The internal resistance of a conventional lead acid battery with 12 V nominal voltage is due to design and technology the currents flowing during the starting process but significantly lower, so the battery does not reach its maximum Output power and significantly oversized for the boot process and too heavy. The use of a smaller battery with higher Internal resistance causes these to be in the range of their maximum Power would be operated. It would sink then but the voltage at the beginning of the starting process almost because of the short-circuit-like operation to zero and the minimum voltage required for starting the engine would not be respected. Besides that would be during startup, the voltage at about 50% of Output voltage. The lower voltage limit for the engine start would then, if at all, only just exceeded. Under these conditions is thus a respect. The maximum possible Power output oversized battery the only one Solution for the mentioned problem.
  • It however, it would be desirable to have a lightweight portable Provide start aid, which has a high starting current for a few seconds, the peak current required within the first 0.5 seconds not fully deployed on a startup help system must be, as an existing battery even in the aged state and at low discharge briefly also a high current can deliver. The possibility of direct reloading the jump start memory after the jump start over the electrical system of the motor vehicle would also be desirable, the charging time should be low. Likewise, the levy would be Maximum battery performance and optimal use the output power desired.
  • Of the The present invention is therefore based on the object, the above solve problems and a start-up system create a maximum power output of the battery or one other energy storage allows this performance can be used optimally, both via the electrical system as well as being rechargeable via the supply network.
  • The problem is solved for a starting aid system according to the preamble of claim 1, characterized in that at least one internal starting assistance memory is provided with a predetermined nominal voltage, wherein the internal starting assistance memory for supporting in the power demand during the starting process to the starter battery is connected in parallel or connected. For a jump start procedure in a vehicle, the object is achieved in that when connecting one or the jump start system to the electrical system of a vehicle, the vehicle electrical system voltage is measured, a control logic of the starting assistance system is powered, the time is reduced to switch on the voltage of the auxiliary starting memory from the voltage measured during clamping vehicle electrical system voltage calculated by a voltage jump of n volts and the voltage supply is interrupted as soon as the vehicle electrical system voltage rises above a predetermined voltage. Further developments of the invention are defined in the dependent claims.
  • Thereby a start-up system is created in which by providing the Starthilfespeichers parallel to the starter battery this at the Performance request during a startup or during the operationally necessary functions is supported. One Discharge the booster battery and charging the starter battery Start of the startup process is thus prevented.
  • falls the vehicle electrical system voltage several times during the starting process below a predetermined or predetermined threshold, switches the startup help system also several times on and off; so that always, when the lower or upper threshold is reached, the power supply or the startup support switched on or interrupted becomes. An interruption of the power or voltage supply can alternatively also be done after a predetermined period of time.
  • The Rated voltage and / or operating voltage of the auxiliary starting memory can the rated voltage and / or operating voltage of the onboard power supply battery correspond. Alternatively, the voltage of the auxiliary starting memory and the vehicle electrical system voltage of the vehicle be different levels. For batteries z. B. a rated voltage of at least about 10th V may be useful in double-layer capacitors for example, three double-layer capacitors with a nominal voltage be provided by about 2.5 to 2.7 V each. The advantage is the tension to choose the boot-up memory with batteries so big that the optimal charging voltage of the booster battery about twice as high is like the vehicle electrical system voltage with the alternator running. To Take into account that the memory is from a Series connection of single cells with a defined internal resistance is constructed. The goal should be to increase the number of cells so choose that the internal resistances and the load resistance have an equal value, so that a power adjustment with maximum output power and minimum losses is achieved.
  • Advantageous is a booster battery or a starting aid memory with higher Rated voltage as now commonly used, so the required Power to be provided with the smallest possible battery can. The voltage limits during the boot process can thereby nevertheless be respected. If z. B. a battery with 18 V operating voltage and an internal resistance, which is the load resistance of the starter during is equal to the startup used Output voltage of the battery or the auxiliary starting memory during booting about 9V and the boot process can be done easily be performed.
  • At the Jump start process is thus a jump start memory with unusual Rated or operating voltage used, in particular a battery or a double-layer capacitor, with a rated voltage of at least about 10 V. The capacity of the booster battery can at least be about 2 Ah, in particular 2 to 10 Ah, in particular 6 to 7 Ah. Also, a capacity of just under 2 Ah is basically possible, but usually become capacity values to be used by over 2 Ah. Will be a nickel metal hydride battery For example, this may have a capacity of about 6.5 Ah, while an internal resistance of about 1.3 to 1.6 mΩ per cell after a millisecond discharge in the range of about 300 amps.
  • Advantageous the internal resistance of the auxiliary starting memory is selected or selectable that the internal resistance of the auxiliary starting memory about the internal resistance of the starter in the operating state of a Starts corresponds. The total voltage can be advantageous about twice as high as a boot-up optimal Be tension. Regardless of the rated voltage thus indicates the startup memory one for a boot process required Internal resistance area on and the electrical system of the vehicle, the Jumpstart can be given before a rated voltage outside of the permitted range.
  • There the existing starter and vehicle power supply battery remains in the car, Thus, two batteries with different voltage in parallel connected. Therefore, a control device is advantageously provided, the connection of the internal start-up memory of the jump start system controlled on the electrical system, so that both batteries or memory, the on-board battery and the starting aid memory, only at load time operated in parallel. Problems due to the design of the batteries or memory with different voltage can thereby be avoided.
  • As an alternative to the method described above, the object can also be achieved by a method in which, with a favorable choice of the nominal voltage of the starting assistance memory, the control logic and the switch operated by it by a pas sive component, eg. As a diode to be replaced. Alternatively, thus, the function of the control logic and the switch operated by it by a passive semiconductor switch, for. As a diode to be replaced, which only becomes conductive when the voltage of the auxiliary starting memory is above the greatly reduced during startup voltage of the starter battery. If a passive component is provided instead of the control logic and of the switch actuated by this, this allows the flow of current from the starting aid memory to the starter after the vehicle electrical system voltage has fallen below the voltage of the auxiliary starting memory, and interrupts the current flow again, as soon as the vehicle electrical system voltage is higher.
  • When furthermore, it proves to be advantageous, if between a starting aid memory with an operating voltage below the usual vehicle electrical system voltage in the idle state and the electrical system a diode is switched, the then allows a flow of current from the starting aid memory, if the vehicle electrical system voltage due to the voltage drop at start falls below the voltage of the auxiliary starting memory.
  • One Boot process via the external startup help system without one built-in vehicle battery is usually not provided because the vehicle after the end of the boot process and then running Engine functional even after disconnecting the jump start system should stay. This would be without a battery in the vehicle not possible. Another requirement for performance and However, voltage of the built-in system battery is not set up here.
  • Around in the event of a failure of the control logic and / or a circuit breaker between starting aid system and electrical system this against too high a voltage Protecting the boot memory is an advantage Protective circuit provided. Advantageously, the protective circuit comprises at least one resistor or diode across or the starting aid memory from a predetermined voltage, the over the expected during operation vehicle electrical system voltage and the consumer of the on-board network is damaging voltage, is dischargeable or unloaded. The protective circuit advantageously consists of a Diode, so that when a voltage exceeded the impermissible Current is shorted through this device. The protective circuit is advantageously hard with the output terminals of the jump start system connected, so is in any case active. It is advantageous when loading Startup memory not engaged. If a permanent load This protective circuit acting as a bypass is not possible is advantageous, an acoustic warning message can be issued, the to disconnect the jump start system prompts.
  • Advantageous is at least one device for smoothing the voltage with frequent switching operations by the control logic provided, in particular with manual connection of the Starthilfespeichers. A Such smoothing device can, for. B. a smoothing capacitor be.
  • A Activation of the start-up assist system may occur upon detecting a load jump done by a voltage jump. Therefore, one advantage Device provided for detecting a load jump, which is advantageous is included by the control logic and that of the before starting the boot process measured on-board voltage, and switching on or Leitendmachen a circuit breaker. This will make the booster battery automatically connected via the circuit breaker and disconnected, allowing a boot process through the boot memory and a recharge of this by the on-board battery automatically can be done. However, the booster battery can also be switched manually be formed when a load jump can not be detected or is and / or when the vehicle electrical system voltage is so low that the starting process of the vehicle by its control units is no longer useable. The jump start memory can in particular be disconnected from the battery of the vehicle when the vehicle electrical system voltage over rises a predefinable limit with the vehicle engine running. Because at this time the terminals of the jump aid have the same voltage as the electrical system battery, there at Disconnect no sparking. Incidentally, also occurs at Connecting the booster with the electrical system no sparking on, because the terminals of the booster are de-energized. Protection against reverse polarity is automatic by the control unit ensured and the sequence when connecting and disconnecting is not relevant.
  • Advantageously, a circuit arrangement for directly charging the start-up memory, in particular two halves of the start-up auxiliary memory or the starting aid battery, provided via the electrical system. The Starthilfesystem can advantageously be connected directly to the starter battery of the vehicle for recharging, so that a recharge takes place via this. Advantageously, no discharge of the internal start-up memory of the start-up assistance system is provided at this time. This compensating currents can be avoided. The starting aid memory can advantageously be recharged via an external voltage source, which provides a voltage below (eg 6 V) and / or above (40 V) the nominal voltage. The charging power is advantageously designed so that in a short time, z. B. about a minute, the charge taken in the jump-start charge is loaded back into the starting aid memory, ie the charging current is z. B. a few 10 amps. In particular, two halves of Starthilfespeichers can be connected to each other via at least one switch and with the electrical system battery via additional switches. The one switch can be identical to the circuit breaker of the start assist system, via which the control logic can be switched on.
  • It can advantageously at least one device for evaluating the data be provided the start-up assistance system for assessing the electrical system battery. about Such an evaluation device can be fast and easy also be determined whether possibly damaged the electrical system battery is and needs to be replaced if necessary. Such a data logger is advantageous as an independent unit of the jump start system trained to be able to evaluate data and also after the startup process and disconnecting the Starthilfesystems more data to be able to record. With a connected jump start system If necessary, a bonnet of a vehicle can no longer be closed why, to drive the vehicle into a workshop or should be removed to another place the startup help system. The datalogger measures the voltage of the electrical system and saves these with a high temporal resolution, such. B. 1 kHz. It can be switched on manually and starts either by another manual intervention to save the data or he Storage starts as soon as the voltage increases by more than one predefinable value changes, such. B. 0.5 V at power of control units. For this is a corresponding query and evaluation of the voltage values provided.
  • When furthermore, it proves to be advantageous that the starting aid system is modular is constructed. This allows the integrated start help memory ever be customized according to vehicle type. The remaining components the start-up system, however, can be independent from the jump start memory in all embodiments used by start-up assistance systems.
  • In terms of the construction of the jump start system, it proves to be advantageous its housing so that it looks like a Cover, which is in particular form-adapted, over the weak on-board battery can be placed. In case of an explosion then there would be a protection against splinters.
  • to closer explanation of the invention will be hereinafter an embodiment of this with reference to the drawings described in more detail. These show in:
  • 1 a diagram with internal resistances of different NiMH modules with 6 cells at different current amplitudes,
  • 2 a schematic representation of the structure and the coupling of a starting aid according to the invention to a vehicle electrical system,
  • 3 a diagram showing the voltage curve during a start operation (low battery) with indicated switching thresholds (U1, U2) of the start assist system,
  • 4a . 4b a schematic representation of a direct charge circuit for recharging the booster battery, wherein the state of the circuit breaker between the on-board battery and the two halves of the booster battery during the starting process ( 4a ) and during recharging ( 4b ) are shown.
  • 1 shows a diagram showing the internal resistances of various nickel-metal hydride modules with six cells at different current amplitudes. Values up to approx. 200 A represent the usual field of application for modules of hybrid vehicle applications. The six cells of the nickel-metal hydride modules have a nominal voltage of 7.2 V in the example shown.
  • Of the 1 It can further be seen that nickel-metal hydride modules or batteries with a capacity of about 6.5 Ah in the range of about 300 A have an internal resistance of about 1.3-1.6 mΩ per cell after a millisecond discharge. After one second, the value increases to approx. 2 to 2.3 mΩ per cell.
  • at fifteen series-connected cells with a nominal voltage of 18 V and an operating voltage of approx. 20 V in the complete charged state, these then have approximately an internal resistance, the load resistance of the starter, terminals, wiring etc. during startup. The batteries be under these conditions in the starting process with their maximum Power operated. At rest of the starter is the resistance the armature, however, much lower than the internal resistance of the battery. The battery is therefore almost always operated in short-circuit when switched on. The current is much higher than in other operating states. The tension sinks, but should continue over remain at the lower limit voltage for the starting process. This is done by switching many cells of the battery in series as well as the starter battery of the electrical system allows. These Although it can not deliver the required performance anymore but also to ensure that the vehicle electrical system voltage does not collapse.
  • 2 shows schematically the structure of a starting aid system according to the invention 10 connected to an electrical system 11 a motor vehicle, including, inter alia, a starter, and a starter battery 12 is is closed. The startup help system 10 includes a control logic 1 and an internal start help memory 2 z. B. with a rated voltage above 12 V, which is connected in parallel to the starter battery to assist in the power request during the boot process. The switch-on and switch-off thresholds or criteria for the internal start help memory can be specified exactly to the control logic, so that the switching thresholds for the memory technology used can be adjusted accordingly. The switching thresholds are dynamically changeable by the logic unit or control logic depending on the terminal voltage of the electrical system. A schematic representation of the voltage curve during a start process of a weak battery is together with the thresholds U1 and U2 of the start assist system in 3 to see.
  • As 2 can be taken further, the control logic 1 from the start help memory 2 powered. Therefore, the control logic 1 with a switch or circuit breaker 7 to manually disconnect the control logic from the startup help memory 2 so that the starting aid memory in the form of a battery is not discharged at a standstill.
  • To charge the startup memory is an external or internal charger 3 provided and with the jump start memory 2 connected. Furthermore, the start-up assistance system includes a data logger 4 which is integrated between the starter battery and the control logic. This data logger can be designed as a separate unit that can be separated from the other components of the startup assistance system. About this datalogger 4 Current, voltage and possibly temperature values can be recorded and stored with high temporal resolution, eg. B. with a resolution of 1 kHz.
  • The in the datalogger 4 stored data can be read, for example via a USB port. An evaluation can take place via a normal PC, which however in 2 not shown.
  • The jump start system points accordingly 2 Furthermore, a 12 V Bordnetzersätzeinrichtung 6 on. However, this is not essential. However, if the onboard power supply battery has such a low voltage that not even the engine startup control units can be switched on, the 12 V onboard power supply unit can generate a required vehicle electrical system voltage in the permissible range instead of or in addition to the starting aid memory. The onboard power supply unit 6 can via a switch 8th with the electrical system 11 get connected.
  • The internal start help memory 2 indicates a different terminal voltage than the starter battery 12 on. For batteries as starting aid storage, the voltage will be above the vehicle electrical system voltage, so that they can be operated in the range of their maximum power. For double-layer capacitors (DSC) as start-up memory, a lower voltage can be used to minimize the cost of the double-layer capacitors. In the case of double-layer capacitors, a voltage which is significantly above the maximum permissible vehicle electrical system voltage is usually not possible, since double-layer capacitors initially show only a small voltage dip in the short circuit. For example, six double-layer capacitors are realized with a charging voltage of 2.7 V per cell, since their maximum voltage of 16.2 V at the start of the starting process will drop below 16 V, provided that such a voltage is permissible for the particular application. Additional rated voltages of double-layer capacitors are normally not possible with a 12 V electrical system.
  • The jump start memory 2 normally has a significantly higher rated voltage than the vehicle electrical system. With a 12 V electrical system, the voltage of the auxiliary starting memory becomes 2 in the range of about 20V to about 26V. 20 V are provided by z. B. 15 cells with a rest voltage of about 1.32 V / cell, whereas 26 V by z. B. 18 cells can be realized with a voltage of about 1.45 V / cell, measured a short time after disconnecting from the Ladeerhaltungsspannung. For 24 V on-board systems, the values are twice as high, that is, at about 40 V to about 52 V.
  • In case of failure of the control logic 1 the electrical system 11 To protect against excessive voltages, a protective circuit is provided (in 2 not to be seen), which is from a predetermined voltage, which is above the expected during operation vehicle electrical system voltage and under the load of the electrical system voltage, z. B. a voltage of about 15 V, the start-up memory, z. As a battery, discharges through a resistor. Here can z. B. a zener diode may be provided, which becomes conductive from a certain voltage.
  • As already mentioned above, the provision of a device for reloading the Starthilfespeichers makes sense. Such a device may be a DC / DC converter, which uses the voltage of the electrical system, as soon as the electrical system has a voltage above about 13V. Another possibility is to provide as a device the cigarette lighter of a vehicle and a DC / DC converter or a 240 V socket, a plug-in power supply or a conventional charger can be used. The control logic monitors the charging process and releases the DC / DC converter. An overload of memory is also prevented by the control logic.
  • Alternatively or additionally, with an appropriate choice of the nominal voltage of the auxiliary starting memory 2 the store also directly through the electrical system battery 16 done as in 4a and 4b outlined. Here is a circuit breaker between the two halves of Starthilfespeichers 13 inserted. This is at startup to connect the two halves 20 . 21 the booster battery or the memory is closed ( 4a ) and will be opened for reloading ( 4b ). The function corresponds to the switch 13 the switch 7 , About two more circuit breakers 14 . 15 are the two halves 20 . 21 the jump start memory 2 connected to the electrical system battery at both ends or poles. The two circuit breakers 14 . 15 are opened at startup and closed for reloading. Immediately after the end of the starting process, the vehicle electrical system voltage rises very quickly to over 13 V, so that then the booster battery can be charged.
  • The charging voltage of a NiMH battery is z. B. in the range of 1.4 to 1.6 V, ie in a nine-cell battery part with a rated voltage of 10.8 V at a vehicle electrical system voltage between 12.6 and 14.4 V. The advantage of 4 sketched charging circuit is that this does not require a DC / DC converter and thus is easier and cheaper. The recharging of the auxiliary starting memory takes place immediately after the end of the starting process until the starting aid system is disconnected. The charging circuit also has the advantage that standard chargers can be used for 12 V vehicle electrical systems.
  • It is also advantageous to measure the current of the auxiliary starting memory by the voltage drop across the circuit breakers 7 or 13 possible, so that without additional components of the datalogger can detect the power of the booster, and / or the battery current through a clamp meter. Advantageously, the determination of the charging and discharging current is possible here in order to enable a monitoring of the state of charge, which is calculated via the current integral.
  • In order to generate the at least required on-board network voltage for initiating the starting process, the starting aid memory can be used. With a correspondingly high switching frequency with which the voltage of the auxiliary starting memory is switched on and off on a smoothing capacitor, the smoothing capacitor can be applied to a voltage required for the initiation of the starting process, for. B. 10 V charged. The voltage will fluctuate relatively high for small and inexpensive capacitors. It can therefore also a small spare battery, namely the onboard power supply 6 , are used when the engine control units are not operating properly with such high and large voltage fluctuations, even if they are within the allowable voltage range. This replacement battery is able for a short time, z. B. 10 seconds to deliver a sufficiently high current, for. B. a current of about 50 amps, without the vehicle electrical system voltage drops below the voltage at which the controller turns off. 10 2.5 Ah high-rate NiCd or NiMH cells connected in series or a 12 V lead-acid battery in the capacity range of approx. 2-6 Ah or a small lithium battery (3 cells) are already sufficient for this purpose.
  • Out the voltage curve of the electrical system during and after The boot process can already without current measurement, but better with Current measurement, to be closed on the condition of the electrical system battery. When the voltage of the alternator to the set voltage value of the electrical system increases, then it is assumed that the cargo capacity the battery is low and it is sulphated. She is then in a worse condition than a battery that contributes a high charge current draws less tension. From the voltage noise of the battery, caused by load fluctuations of the vehicle, can over it In addition, the internal resistance can be estimated. A Damaged battery has a much higher Internal resistance as a very deep discharged battery. Using a clamp meter, as already mentioned above is, the corresponding evaluations are more accurate.
  • The procedure for starting and reloading startup memory will now be described below. When starting the jump start system, the control logic is initially applied to the on-board network of a vehicle for the jump start procedure 1 supplied with power from the weak starter battery and measured the vehicle electrical system voltage. If the vehicle electrical system battery has too low a voltage or load capacity, then the power is supplied via the on-board power supply battery or the smoothing capacitor charged via the starting auxiliary storage. Here, a manual switch is provided. The control logic calculates the voltage to be supplied from the electrical system voltage measured during clamping reduced by a voltage jump of n volts, z. B. 2 volts. Such a voltage jump or break is associated with a high current load of the electrical system battery, as it exists during the starting process. The voltage supply is interrupted, so the start assist system off as soon as the voltage is above a voltage U2 z. B. of about 13 V, but at the latest after a predetermined time, such. For example 5 seconds. The respective switching thresholds can be specified by the manufacturer, as well as the time values. Advantageously, the voltage and time values can not be changed by the user, thus no damage to the on-board network of the vehicle due to an incorrect setting of the values occur. Basically, however, a user-side adjustability of the voltage and time values can be provided. Possible here is z. B. a dynamic specification of the threshold and time values depending on the height of the vehicle electrical system voltage. With a high terminal voltage can be assumed that a functional battery with a high state of charge, so that an intensive support, combined with a long duty cycle, is not required. With low vehicle electrical system voltage can be assumed that a non-bootable starter battery, so that the duty cycle is to extend.
  • At very low voltage, which is for example at about 0-6 volts, u. U. no load jump will be detected more or the engine control units will not start the boot process. Then the switch 7 be manually operated, so that the starting aid memory 2 is switched to the electrical system. The vehicle electrical system voltage then rises immediately and the switch 7 is about the control logic 1 operated so that the vehicle electrical system voltage remains in a likewise predeterminable voltage range, for example, a range between about 8 V and about 12 V. It may also prove useful to use a small capacitor via the terminals of the auxiliary starting memory 2 so that the voltage does not switch between the two limits so quickly.
  • The circuit breaker 7 should conduct high currents loss, which is why the use z. B. a MOSFET proves to be suitable. Losses when switching on and off can usually be neglected. Because of the maximum low duty cycle of z. B. 5 seconds no special cooling is needed. Advantageously, the mounting of the switching elements directly on the housing in order to derive the power loss in the form of heat directly to the outside. In principle, of course, a cooling can be provided, if this is application-specific desired or should prove to be advantageous. A particularly favorable structure results in the provision of a parallel connection of MOSFETs, since then modules can be constructed with a maximum current of well over 1000 A by simply connecting several MOSFETs in parallel using a driver.
  • For Jump start with 24 V electrical systems would be the examples for a 12 V electrical system voltage levels to double. However, the mentioned exemplary time values can be used stay the same as above.
  • If the start assist system is placed on the battery to be started, z. B. with a shape-matched housing, it is possible the cables used 5 for the connection of the jump start system to the electrical system and the starter battery or electrical system battery very short interpreted, z. B. to be provided with a length of about 30 cm. As a result, cables can advantageously be saved and inductive overvoltages, which can have a negative effect on the electrical system, be avoided. Due to the small length, the cables can be relatively thin.
  • Next the embodiments mentioned above and shown in the figures start-up systems and jump-start procedures still numerous further are formed, with which in each case at least a circuit breaker, in particular semiconductor switch and at least an internal start help memory are provided, the start help memory is switched parallel to the starter battery of the vehicle or can be switched. In particular, the nominal voltage or Operating voltage of the auxiliary starting memory higher than usual and differs in particular from the vehicle electrical system voltage. About that In addition, applications are possible in which the one described here Jump Start System can completely replace a starter battery, z. B. in vehicles, where in addition to a board battery in addition a starter battery used only for starting used, or in emergency power systems. Especially for hybrid vehicles, where a traction battery and a starter battery provided can be waived on the second. A DC / DC converter ensures in this case for the stabilization of the low-voltage electrical system and the starting process of the internal combustion engine is used a modified version of the start assist system presented here carried out.
  • 1
    control logic
    2
    Jumpstart memory
    3
    external or internal charger
    4
    data logger
    5
    electric wire for connection to batteries
    6
    Emergency mooring facility
    7
    breakers
    8th
    switch
    10
    Boot Helper
    11
    board network
    12
    starter battery
    13
    breakers
    14
    breakers
    15
    breakers
    16
    System battery
    20
    half Booster battery
    21
    half Booster battery
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
  • Cited patent literature
    • - DE 202007004272 U1 [0003]
    • - DE 29909348 U1 [0004]
    • - DE 19951094 C2 [0005]
    • - DE 10049321 A1 [0006]
    • - US 6212054 B1 [0007]

Claims (27)

  1. Startup assistance system ( 10 ) for a vehicle, comprising at least one circuit breaker ( 7 . 13 ), in particular semiconductor switch, characterized in that at least one internal starting aid memory ( 2 ) is provided with a predetermined nominal voltage, wherein the internal starting aid memory ( 2 ) for assisting in the power demand during the startup process to the starter battery ( 12 ) of the vehicle is switched or connected in parallel.
  2. Startup assistance system ( 10 ) according to claim 1, characterized in that the rated voltage and / or operating voltage of the auxiliary starting memory ( 2 ) corresponds to the rated voltage and / or operating voltage of the electrical system battery.
  3. Startup assistance system ( 10 ) according to claim 1, characterized in that the voltage of the auxiliary starting memory ( 2 ) and the vehicle electrical system voltage of the vehicle are different.
  4. Starting aid system according to one of the preceding claims, characterized in that the starting aid memory a rated voltage of at least about 10V.
  5. Jump start system according to one of the claims 1 to 4, characterized in that when using double-layer capacitors at least three double-layer capacitors with a nominal voltage of about 2.5 to 2.7V are provided.
  6. Starting aid system according to one of the preceding claims, characterized characterized in that the capacity of the booster battery at least about 2 Ah, in particular 2 to 10 Ah, especially 6 to 7 Ah.
  7. Startup assistance system ( 10 ) according to one of the preceding claims, characterized in that the internal resistance of the starting aid memory ( 2 ) is selected or selectable so that the internal resistance of the auxiliary starting memory ( 2 ) corresponds approximately to the internal resistance of the starter of the vehicle in the operating state of a start, and the total voltage is about twice as high as an optimum voltage occurring during the starting process.
  8. Starting aid system according to one of the preceding claims, characterized in that a protective circuit is provided for the protection of the electrical system ( 11 ) against too high a voltage of the auxiliary starting memory ( 2 ) in case of failure of the control logic ( 1 ) and / or a circuit breaker ( 7 . 13 ) between start-up assistance system ( 10 ) and electrical system ( 11 ).
  9. Starting aid system according to claim 8, characterized in that the protective circuit comprises at least one resistor or a diode, via which or the starting aid memory ( 2 ) from a predefinable voltage which exceeds the expected during operation vehicle electrical system voltage and the consumer of the electrical system ( 11 ) harmful voltage is discharged or discharged.
  10. Start-up aid system according to one of the preceding claims, characterized in that a device ( 1 ) is provided for detecting a load jump, starting from the measured before the start of the vehicle electrical system voltage, and switching on or Leitendmachen a circuit breaker.
  11. Start-up aid system according to claim 10, characterized in that the starting aid memory ( 2 ) is manually switched on when the load jump is not detectable or when the vehicle electrical system voltage is so low that the starting process of the vehicle by its control units is no longer einleitbar.
  12. Starting aid system according to one of the preceding claims, characterized in that the starting aid memory of the battery of the vehicle is disconnected when the vehicle electrical system voltage over rises a predefinable limit with the vehicle engine running.
  13. Starting aid system according to one of the preceding claims, characterized in that at least one means for smoothing the voltage during frequent switching operations the control logic is provided, in particular with manual connection the jump start memory.
  14. Starting aid system according to one of the preceding claims, characterized in that the means for smoothing is a smoothing capacitor.
  15. Start-up assistance system according to one of the preceding claims, characterized in that a circuit arrangement for directly charging the start-up auxiliary memory ( 2 ), via the electrical system is provided.
  16. Starting aid system according to claim 15, characterized in that two halves of the auxiliary starting memory are interconnected via at least one switch ( 13 ) and with the vehicle electrical system battery ( 16 ) via further switches ( 14 . 15 ) are connected.
  17. Starter system according to claim 16, characterized in that the one switch ( 13 ) is identical to the circuit breaker ( 7 ).
  18. Starting aid system according to one of the preceding claims, characterized in that an external charger for charging the starting aid memory ( 2 ) is provided.
  19. Starting aid system according to one of the preceding claims, characterized in that an internal charger for charging the starting aid memory ( 2 ) is provided.
  20. Starting aid system according to one of the preceding claims, characterized in that at least one means for evaluating the data of the starting aid system for the evaluation of the on-board power supply battery is provided.
  21. Starting aid system according to one of the preceding claims, characterized in that the start assist system is modular is.
  22. Starting aid system according to one of the preceding claims, characterized in that a housing of the starting aid system designed in the manner of a cover that is shaped over a weak battery of the vehicle is laid.
  23. Method for jump starting in a vehicle, in particular using the starting aid system according to one of the preceding claims, characterized in that when connecting one or the start assist system to the electrical system of a vehicle, the vehicle electrical system voltage is measured, a control logic ( 1 ) of the starting aid system is supplied with power, the time of switching on the voltage of the auxiliary starting memory ( 2 ) from the vehicle electrical system voltage measured during clamping is calculated by a voltage jump of n volts and the voltage supply is interrupted as soon as the vehicle electrical system voltage rises above a predefinable voltage (U2).
  24. Method according to claim 23, characterized that the startup assistance system upon detecting a load jump through a voltage jump is activated.
  25. Method according to claim 23 or 24, characterized in that instead of the control logic ( 1 ) and a switch actuated by this, a passive component, in particular a passive semiconductor switch is provided.
  26. Method according to claim 25, characterized in that the passive component is a diode.
  27. Method according to one of claims 23 to 26, characterized in that between a starting aid memory ( 2 ) is switched with an operating voltage below the usual vehicle electrical system voltage in the idle state and the electrical system, a diode, which then a current flow from the starting auxiliary memory ( 2 ), if the vehicle electrical system voltage drops below the voltage of the auxiliary starting memory due to the voltage drop during start-up ( 2 ) sinks.
DE102009007545A 2009-02-04 2009-02-04 Boot Helper Pending DE102009007545A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102009007545A DE102009007545A1 (en) 2009-02-04 2009-02-04 Boot Helper

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102009007545A DE102009007545A1 (en) 2009-02-04 2009-02-04 Boot Helper
EP10704321A EP2394050A1 (en) 2009-02-04 2010-02-04 Jump start system for a vehicle
PCT/EP2010/000687 WO2010089113A1 (en) 2009-02-04 2010-02-04 Jump start system for a vehicle

Publications (1)

Publication Number Publication Date
DE102009007545A1 true DE102009007545A1 (en) 2010-08-05

Family

ID=42114009

Family Applications (1)

Application Number Title Priority Date Filing Date
DE102009007545A Pending DE102009007545A1 (en) 2009-02-04 2009-02-04 Boot Helper

Country Status (3)

Country Link
EP (1) EP2394050A1 (en)
DE (1) DE102009007545A1 (en)
WO (1) WO2010089113A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013226155A1 (en) * 2013-12-17 2015-06-18 Continental Automotive Gmbh Device for protecting at least one energy storage device of a vehicle and jumper cables, electrical energy storage and vehicle with such a device
US20160233662A1 (en) * 2015-02-06 2016-08-11 Mathew Inskeep Jump Starter Auto Safety Jumper Module

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011108231A1 (en) 2011-04-12 2012-10-18 Audi Ag Energiespeicheranordung

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29909348U1 (en) 1999-05-28 1999-08-12 Hauck Erich Portable 12 VDC / 230 VAC battery energy storage with integrated inverter and recharging controller for solar and wind generators
US6212054B1 (en) 1999-09-21 2001-04-03 Powerpro Inc. Spark proof booster cable system
DE10049321A1 (en) 2000-10-05 2002-04-11 Hella Kg Hueck & Co Electric external power supply e.g. for motor vehicle access-authorization system, has inductive receiving system arranged in vehicle and joined to at least one load
DE19951094C2 (en) 1999-10-23 2002-04-18 Daimler Chrysler Ag Method and device for securing a network containing a battery
EP1424494A1 (en) * 2002-11-27 2004-06-02 Continental ISAD Electronic Systems GmbH & Co. oHG Hybrid propulsion system and method for conjoint application of propulsion torque
DE102004032197A1 (en) * 2003-07-03 2005-02-24 Remy Inc. (N.D.Ges.D. Staates Delaware), Anderson Power module for motor vehicles
DE102004016292A1 (en) * 2004-04-02 2005-10-20 Man Nutzfahrzeuge Ag Circuit arrangement for controlling starter and power supply system of motor vehicle has electrical energy storage device with switch for variably connecting capacitor and/or accumulator to starter motor and/or generator
DE102004062939A1 (en) * 2004-12-28 2006-07-06 ŠKODA AUTO a.s. Method and device for optimized starting of an internal combustion engine
DE202006015805U1 (en) * 2006-04-01 2007-04-19 Kromberg & Schubert Gmbh & Co. Kg Starting aid device for use in internal combustion engine, has energy source that is designed as capacitor having high capacitance, and cables connecting device with external energy source or load, where capacitor is arranged in housing
DE202007004272U1 (en) 2006-03-27 2007-06-06 Hess, Axel Portable multi-purpose starter device, has housing with base for accommodating rechargeable battery, and electrical connector unit, which is separated from housing during loosening of base, between battery and electrical connection units

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1247766B (en) 1990-10-25 1994-12-30 Magneti Marelli Spa Starting system for an internal combustion engine for motor vehicles
DE4340350C2 (en) * 1993-11-26 1996-10-17 Audi Ag Circuit arrangement for a motor vehicle
JP3516361B2 (en) 1995-01-17 2004-04-05 富士重工業株式会社 Power supply for vehicles
JPH0988778A (en) 1995-07-17 1997-03-31 Denso Corp Starter generator
DE19709298C2 (en) 1997-03-06 1999-03-11 Isad Electronic Sys Gmbh & Co Starter system for a combustion engine and method for starting an internal combustion engine
TW429637B (en) * 1999-12-17 2001-04-11 Synergy Scientech Corp Electrical energy storage device
US7267090B2 (en) * 2005-11-21 2007-09-11 Gm Global Technology Operations, Inc. Method of starting a hybrid vehicle
JP2010523882A (en) * 2007-04-04 2010-07-15 クーパー テクノロジーズ カンパニー Method and system for supplying power to a load

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29909348U1 (en) 1999-05-28 1999-08-12 Hauck Erich Portable 12 VDC / 230 VAC battery energy storage with integrated inverter and recharging controller for solar and wind generators
US6212054B1 (en) 1999-09-21 2001-04-03 Powerpro Inc. Spark proof booster cable system
DE19951094C2 (en) 1999-10-23 2002-04-18 Daimler Chrysler Ag Method and device for securing a network containing a battery
DE10049321A1 (en) 2000-10-05 2002-04-11 Hella Kg Hueck & Co Electric external power supply e.g. for motor vehicle access-authorization system, has inductive receiving system arranged in vehicle and joined to at least one load
EP1424494A1 (en) * 2002-11-27 2004-06-02 Continental ISAD Electronic Systems GmbH & Co. oHG Hybrid propulsion system and method for conjoint application of propulsion torque
DE102004032197A1 (en) * 2003-07-03 2005-02-24 Remy Inc. (N.D.Ges.D. Staates Delaware), Anderson Power module for motor vehicles
DE102004016292A1 (en) * 2004-04-02 2005-10-20 Man Nutzfahrzeuge Ag Circuit arrangement for controlling starter and power supply system of motor vehicle has electrical energy storage device with switch for variably connecting capacitor and/or accumulator to starter motor and/or generator
DE102004062939A1 (en) * 2004-12-28 2006-07-06 ŠKODA AUTO a.s. Method and device for optimized starting of an internal combustion engine
DE202007004272U1 (en) 2006-03-27 2007-06-06 Hess, Axel Portable multi-purpose starter device, has housing with base for accommodating rechargeable battery, and electrical connector unit, which is separated from housing during loosening of base, between battery and electrical connection units
DE202006015805U1 (en) * 2006-04-01 2007-04-19 Kromberg & Schubert Gmbh & Co. Kg Starting aid device for use in internal combustion engine, has energy source that is designed as capacitor having high capacitance, and cables connecting device with external energy source or load, where capacitor is arranged in housing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013226155A1 (en) * 2013-12-17 2015-06-18 Continental Automotive Gmbh Device for protecting at least one energy storage device of a vehicle and jumper cables, electrical energy storage and vehicle with such a device
US20160233662A1 (en) * 2015-02-06 2016-08-11 Mathew Inskeep Jump Starter Auto Safety Jumper Module

Also Published As

Publication number Publication date
EP2394050A1 (en) 2011-12-14
WO2010089113A1 (en) 2010-08-12

Similar Documents

Publication Publication Date Title
US6583519B2 (en) Apparatus for generating and distributing electrical power to loads in a vehicle
JP4722361B2 (en) Apparatus for generating power using a fuel cell in a vehicle and method of operating such an apparatus
EP1761988B1 (en) Device and method for equalizing charges of series-connected energy stores
US9793722B2 (en) Power source apparatus for vehicle
EP2232672B1 (en) Circuit for voltage stabilization in an onboard power supply
AU761219B2 (en) Battery charge indicator
US20100121511A1 (en) Li-ion battery array for vehicle and other large capacity applications
DE102009053712B4 (en) Battery system that detects excessive current and interrupts current flow with a fuse and relay
EP1882850A1 (en) Engine start device
KR101583340B1 (en) Apparatus for battery control and method for battery control for electrical vehicles
EP2460253B1 (en) Circuit arrangement for an on-board system
JP2011130551A (en) Power supply device and vehicle with the same
EP2343768A2 (en) Battery system and method for detecting current restriction state in a battery system
DE102011002264A1 (en) Power supply unit with a large number of rechargeable batteries
US3463995A (en) Electric feeding installation on internal combustion vehicles and engines
DE102011000665A1 (en) Power supply for vehicles
EP1593188B1 (en) Device for supplying power to a two-voltage vehicle electric system
EP2541265B1 (en) Abnormality diagnosis device and method of cell balancing circuit
EP2645527A1 (en) Battery pack
JP2003517806A (en) Battery charge maintenance device and method
DE102011056270A1 (en) Power supply unit for vehicle, has starter motor, electrical loads and lithium battery providing power produced by generator or power charged by lead acid battery, and bypass relay switching bypass line between line and isolation conditions
EP2368749A2 (en) Power supply device having precharging function
US20120025768A1 (en) Power supply device having precharging circuit for charging capacitor
US6057666A (en) Method and circuit for controlling charging in a dual battery electrical system
EP0935540A1 (en) Control unit for the power supply system on-board

Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
R016 Response to examination communication