EP3221709A1 - Verfahren zur erkennung einer batterie sowie spannungsversorgungssystem - Google Patents
Verfahren zur erkennung einer batterie sowie spannungsversorgungssystemInfo
- Publication number
- EP3221709A1 EP3221709A1 EP15795148.4A EP15795148A EP3221709A1 EP 3221709 A1 EP3221709 A1 EP 3221709A1 EP 15795148 A EP15795148 A EP 15795148A EP 3221709 A1 EP3221709 A1 EP 3221709A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- battery
- voltage
- power supply
- supply system
- rectified
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/67—Testing the correctness of wire connections in electric apparatus or circuits
Definitions
- the invention relates to a method for detecting a battery acting within a power supply system of a motor vehicle, wherein an electrical alternating voltage is generated by a generator, and this AC voltage is rectified by a rectifier, and the rectified voltage is measured and analyzed by a control unit, and the rectified voltage is measured and analyzed by a control unit. Furthermore, the invention relates to an associated power supply system, in particular of a motor vehicle.
- the acting battery means that the battery is functionally integrated in the power supply system.
- cable breakage of an electrical lead from one of the at least two poles of the battery to the remainder of the power supply system would result in the battery becoming unable to operate within the power supply system, for example as a power supplier.
- the field of application of the invention extends to motor vehicles which have a three-phase generator operated, for example, via the drive. Often this is an alternator, either already containing a rectifier or behind which a rectifier is connected to produce a DC voltage that can be used by the vehicle's various electrical systems. Depending on the type of vehicle, the DC voltage may be, for example, not exclusive, about 12V or 24V or 48V.
- a battery is further provided, which is connected substantially parallel to the generator or to the rectifier, and in the first place a permanent To ensure power supply. However, due to cable breaks, for example, such a battery may effectively be removed from the circuit.
- US 2011/0260755 A1 discloses a power supply system for a motor vehicle, wherein a pulse generator generates signals whose evaluation makes it possible to detect the presence or absence of a battery connected in parallel with the generator.
- the disadvantage is the need for a pulser and the complex evaluation.
- FR 2 962 264 A1 discloses a method for contactless charging of a battery, in which the presence of a battery can also be diagnosed.
- the disadvantage here is the technical complexity and the lack of feasibility, especially in motor vehicles.
- US 5,932,989 A discloses a method of detecting the presence of a battery in a circuit by adjusting the voltage level in that circuit is actively influenced.
- a disadvantage is the necessary intervention in the function of the circuit.
- a voltage supply system relating to the invention is presented in claim 10.
- the invention includes the technical teaching that when analyzing vibration characteristics of the voltage outside a tolerance interval, the absence of a battery acting in the power supply system is diagnosed.
- the advantage of this method is, inter alia, that an analysis of the voltage signal is usually already provided in the prior art, and that therefore no additional sensor system has to be installed.
- the voltage of an electrical system can be measured non-invasively, so it is not necessary to intervene in the system, for example by changing the voltage level or by sending voltage pulses.
- a preferred embodiment of the method provides that an oscillation of the rectified voltage having an amplitude above a critical amplitude threshold value is analyzed as the oscillation property.
- the advantage of this method is that the amplitude of such an oscillation, ie its voltage, is particularly easy to measure and analyze.
- the physical relationship between the absence of a battery and an increased amplitude of an oscillation on the rectified voltage signal is due to the fact that an inserted battery, in particular when it is connected substantially parallel to the rectifier, has a damping effect on the signal emanating therefrom. The amplitude of vibrations on the voltage signal is thus reduced in a battery connected in parallel.
- the mean value or the median of the amplitude can be analyzed over a critical duration, for example over a duration in the range of hundredths of a second.
- Another preferred embodiment of the invention provides that an oscillation of the rectified voltage having a frequency above a critical frequency threshold value is analyzed as the oscillation property.
- One of the advantages of this method is that a frequency analysis can easily be carried out, for example, with the aid of a Fourier transformation performed by the control unit.
- An improvement of the invention provides that the measurement and analysis during the cranking of the motor vehicle is suspended. This refers to the activation of a starter of the motor vehicle, for starting an internal combustion engine driving the motor vehicle and the generator.
- the advantage of this embodiment is, inter alia, that during the activation of the starter usually voltage spikes and untypical voltage waveforms are expected, which would complicate a reliable analysis of the presence or absence of a battery.
- An improvement of the invention provides that when the absence of a battery is diagnosed, an audible and / or visible signal is output via an interface of the motor vehicle perceptible by the driver.
- This may, for example, be a warning light on the dashboard or a voice message.
- the advantage of this improvement is essentially that the driver is informed about the absence of the battery before the engine is switched off, since the engine may not be able to switch on without maintenance measures and other malfunctions, for example with regard to the parking brake, may occur ,
- An improvement of this embodiment provides that with the signal a warning for applying a parking brake is issued.
- the advantage in this case is to be seen in particular in the fact that the parking brake represents a safety-critical system which, if necessary, can no longer be used after the motor has been switched off, in particular in the case of an electrically controlled parking brake without manual control.
- a warning also has a safety-relevant, functional function.
- a further improvement of the invention envisages that, when the absence of a battery is diagnosed, a diagnosis message for facilitating maintenance work is stored in an electronic storage unit.
- a further preferred embodiment of the invention provides that in the absence of a battery diagnosis, the power supply of the circuit is maintained, in particular by an auxiliary power supply battery is switched on or by the generator is kept in operation.
- the advantage here is to be seen in the fact that over longer periods of time or for example at least until activating, for example, a parking brake, the power supply is maintained, for example by a driver is prevented from turning off the generator or the engine.
- a power supply system 1 of a motor vehicle comprises a generator 2 which generates a three-phase AC voltage, a rectifier 3 arranged on the output side for converting the AC voltage into the rectified voltage 6, a connection 4 connected in parallel for a battery 5
- a voltage divider consisting of two resistors 8a, 8b arranged.
- a capacitor 9 is connected parallel to the control unit 7 for debouncing or vibration damping of the signal.
- the rectifier 3, the battery 5, the voltage divider and the capacitor 9 have a common earth 10.
- the control unit 7 now analyzes during operation, in particular after starting the engine, the rectified voltage 6, not shown here, for various vibration characteristics, including the amplitude and the frequency of oscillations contained in the voltage 6.
- various vibration characteristics including the amplitude and the frequency of oscillations contained in the voltage 6.
- the mean value or the median of the voltage 6 can be formed over a defined duration and further analyzed.
- an analysis during the starting of the engine is dispensed with, since in this phase possibly vibration characteristics occur that can prevent a targeted analysis. If a cable break 11 occurs, the frequency and / or the amplitude of a vibration lying on the rectified voltage 6 may change.
- the battery 5 is then not only functionally eliminated as an energy supplier in the event that the generator 2 is switched off, but also as a vibration-damping and / or low-pass filtering element of the voltage 6.
- the vibration-damping and / or low-pass filter characteristic In this case, for example, similar to a capacitor via capacitive properties of the battery 5, or, for example, by interaction of the voltage generated by the electric fields 6 with the electrolyte inside the battery 5.
- a critical amplitude threshold value 12 see FIG. 2
- frequencies arise above a critical frequency threshold value 14 (see FIG. 3).
- a signal with a warning for applying a parking brake is output to the driver, for example, since this may no longer be feasible in particular with electronically controlled parking brakes after the engine or generator has been switched off.
- a note, for example in the form of a logbook entry, for example, stored in an electronic memory of the control unit 7, not shown here and the generator prevented from switching off or a not shown auxiliary battery can be switched on.
- Figure 2 shows a diagram in which a voltage U is plotted against the time t. It can be seen the course of the rectified voltage 6, which arises when a cable break 11 occurs at a time 13, whereby the battery 5 is effectively removed from the power supply system 1.
- amplitude threshold value 12 can be drawn symmetrically above and below the mean value, wherein an exceeding of the amplitude threshold value 12 then occurs symmetrically above and below the mean value and can be detected.
- FIG. 3 shows a sketched graphical representation of a spectral analysis performed by the control unit 7.
- the amplitude of a voltage U is plotted against its frequency f.
- a low-frequency spectrum 15 below a frequency threshold value 14 is shown by a dashed line. This corresponds to the spectrum of the voltage 6 before the occurrence of a cable break 11.
- a high-frequency spectrum 16 with vibration components above the frequency threshold value 14 is shown by a dotted line. This high-frequency spectrum 16 arises after the occurrence of a cable break 11, since then the battery 5 no longer acts as a low-pass filter in the power supply system 1.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014116800.3A DE102014116800A1 (de) | 2014-11-17 | 2014-11-17 | Verfahren zur Erkennung einer Batterie sowie Spannungsversorgungssystem |
PCT/EP2015/076498 WO2016079012A1 (de) | 2014-11-17 | 2015-11-13 | Verfahren zur erkennung einer batterie sowie spannungsversorgungssystem |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3221709A1 true EP3221709A1 (de) | 2017-09-27 |
Family
ID=54548159
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15795148.4A Withdrawn EP3221709A1 (de) | 2014-11-17 | 2015-11-13 | Verfahren zur erkennung einer batterie sowie spannungsversorgungssystem |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3221709A1 (de) |
CN (1) | CN107110906A (de) |
DE (1) | DE102014116800A1 (de) |
WO (1) | WO2016079012A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016216845A1 (de) | 2016-09-06 | 2018-03-08 | Robert Bosch Gmbh | Vorrichtung und Verfahren zur Erkennung einer fehlenden elektrischen Verbindung eines Energiespeichers mit einem Energieversorgungssystem, insbesondere ein Bordnetz eines Kraftfahrzeugs |
DE102017218312A1 (de) * | 2017-10-13 | 2019-04-18 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren und Vorrichtung zum Betreiben eines Kraftrads sowie Kraftrad mit einer solchen Vorrichtung |
FR3122292A1 (fr) * | 2021-04-21 | 2022-10-28 | Valeo Equipements Electriques Moteur | Système de régulation de tension d’un réseau d’alimentation électrique |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5932989A (en) | 1998-05-04 | 1999-08-03 | Motorola, Inc. | Method for an electronic device to detect the presence of a battery charger |
US6420854B1 (en) * | 2001-05-17 | 2002-07-16 | Hubbell Incorporated | Battery detector |
DE10142085A1 (de) * | 2001-08-30 | 2003-03-20 | Volkswagen Ag | Verfahren und Vorrichtung zur Bordnetzdiagnose eines Kraftfahrzeugbordnetzes |
DE10219824A1 (de) * | 2002-05-03 | 2003-11-20 | Bosch Gmbh Robert | Verfahren und Vorrichtung zur Erkennung eines batterielosen Fahrzeugbetriebs |
EP1832459B1 (de) * | 2002-07-12 | 2010-09-08 | Toyota Jidosha Kabushiki Kaisha | Verfahren und Vorrichtung, um zu kontrollieren, ob ein von einem mehrphasigen Motor versorgtes Hilfsnetzteil abgeschaltet ist |
DE102004004008A1 (de) * | 2003-01-30 | 2004-08-05 | Robert Bosch Gmbh | Verfahren zur Erkennung einer defekten Batterie oder eines batterielosen Zustands in einem Kfz-Bordnetz |
US6931332B2 (en) * | 2003-10-01 | 2005-08-16 | General Electric Company | Method and system for testing battery connectivity |
DE102004004173B4 (de) * | 2004-01-28 | 2014-02-13 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Erkennung einer abgetrennten Batterie |
JP4241437B2 (ja) * | 2004-03-01 | 2009-03-18 | 株式会社リコー | 電池接続検出回路 |
EP1993196B1 (de) * | 2006-03-09 | 2018-09-19 | Shindengen Electric Manufacturing Co., Ltd. | Energieumwandlungsvorrichtung und verfahren sowie schaltung zur erzeugung von dreieckswellen |
CN101509941B (zh) * | 2008-12-31 | 2012-06-13 | 中兴通讯股份有限公司 | 蓄电池防盗装置及方法、通信网络中的蓄电池防盗系统 |
US8078415B2 (en) * | 2009-11-25 | 2011-12-13 | GM Global Technology Operations LLC | Method and apparatus to monitor state of health of electrical connections between battery and generator |
US8604748B2 (en) | 2010-04-27 | 2013-12-10 | St-Ericsson Sa | Methods and systems for detecting battery presence |
FR2962264A1 (fr) | 2010-07-01 | 2012-01-06 | Renault Sa | Charge sans contact d'une batterie de vehicule automobile |
JP5689497B2 (ja) * | 2013-04-22 | 2015-03-25 | ファナック株式会社 | Dcリンク部異常検出機能を備えたモータ駆動装置 |
-
2014
- 2014-11-17 DE DE102014116800.3A patent/DE102014116800A1/de not_active Withdrawn
-
2015
- 2015-11-13 EP EP15795148.4A patent/EP3221709A1/de not_active Withdrawn
- 2015-11-13 WO PCT/EP2015/076498 patent/WO2016079012A1/de active Application Filing
- 2015-11-13 CN CN201580062390.8A patent/CN107110906A/zh active Pending
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2016079012A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN107110906A (zh) | 2017-08-29 |
WO2016079012A1 (de) | 2016-05-26 |
DE102014116800A1 (de) | 2016-05-19 |
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