CN105556320A - Method for detecting a disconnection of a power supply battery of a motor vehicle - Google Patents
Method for detecting a disconnection of a power supply battery of a motor vehicle Download PDFInfo
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- CN105556320A CN105556320A CN201480051241.7A CN201480051241A CN105556320A CN 105556320 A CN105556320 A CN 105556320A CN 201480051241 A CN201480051241 A CN 201480051241A CN 105556320 A CN105556320 A CN 105556320A
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- 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
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
- B60L58/20—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having different nominal voltages
-
- 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
- G01R31/68—Testing of releasable connections, e.g. of terminals mounted on a printed circuit board
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16542—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies for batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention proposes a method for detecting a disconnection of an electric battery (10) in a system provided with two electrical networks interconnected by a DC/DC voltage converter (4). The battery (10) belongs to one of the two networks (2), and the converter (4) is configured to recharge the battery (2). The method involves adding a predefined voltage signal (Uvar) to a continuous voltage component (Us) delivered by the converter (4) to the network (2) comprising the battery (10), and measuring the current (I) passing through the battery (10), searching for a current signal (Ialternatif) therein that corresponds to the added voltage signal (Uvar), in order to check that the battery (10) is correctly connected to the network (2).
Description
Technical field
The present invention relates to the protection of the electric power supply to motor vehicle network.The present invention more generally can also be applied to the electric system, the especially vehicular electrical system that are combined with two electric power networks interconnected by DC/DC electric pressure converter (DC to DC converter), and one of these networks comprise the battery storage recharged by this DC/DC converter.
The present invention relates more specifically to the protection to low tension being supplied to the vehicle electrical system comprising two electric power networks interconnected by DC/DC converter.These two networks can run by identical rated voltage or by different rated voltages.At at least some electrically powered machines for reclaiming braking energy or for helping in propelled vehicles or the vehicle for both, this vehicle typically can comprise high voltage network, and this high voltage network comprises multiple electrically powered machine so that restriction Joule effect is in the conductor lost and can use the conduction cable reducing diameter.
Background technology
In order to other standard feature, this vehicle can comprise the second electric power networks with low voltage energy supply.Such as, the second low-voltage power network run under the first electric power networks run under can be provided in the voltage (such as the voltage of 48 volts) between 24 volts and 58 volts and the rated voltage between 10.5 volts and 15 volts.
This second " low pressure " electric power networks can comprise storage battery dedicated, and this is storage battery dedicated such as recharges from this high voltage network by means of DC/DC converter in the driven phase process of vehicle.
For relating to the management of the electric energy of this " low pressure " network and the reason relating to the management to this " low pressure " battery recharge, DC/DC converter can be controlled by an electronic control unit, this electronic control unit and then this battery-powered by this secondary network.In order to some security functions of this vehicle, may be necessary to protect the electric power supply of " low pressure " network.Protect a kind of mode of this electric power supply can be utilize one side to be " low pressure " accumulator and this redundant power supply by carrying out to supply this secondary network electric power with this second network via DC/DC converter.In this case importantly by by this DC/DC converter to the power supply deactivation of this secondary network before, check that this A-battery is effectively connected to this secondary network, the electric power supply of this " low pressure " network can be guaranteed later.
Such as the system benefiting from " stop and starting " type is expected that energy-conservation vehicle can be exactly this situation; in this vehicle, the Thermal Motor for propelled vehicles is shut down and promptly restarts when driver jams on accelerator pedal again during red parking.If only can be provided the protection of the electric power supply to " secondary network " by " low pressure " accumulator, then definitely must guarantee that this " low pressure " accumulator did not disconnect before the auto stop of engine.
Patented claim EP1958851 proposes use second battery and protects low pressure In-vehicle networking.Add the second battery add the weight of vehicle and add the cost price of vehicle.
Summary of the invention
The object of the invention is to propose in the motor vehicles of being powered by two electric power networks interconnected by DC/DC converter, especially when one of these networks comprise the battery recharged from another network by means of converter, for monitoring a kind of system of the appropriate connection of the battery of secondary network.This network by means of this DC/DC converter energy supply comprises starter motor sometimes, but does not comprise energy generator (such as alternator or starter-generator) generally, and this is carried on this first electric power networks.
The monitoring device proposed must be reliably, must not disturb the power components of these two networks and electrical appliance and must install with low cost price and not increase vehicle weight.
For this purpose, the present invention proposes a kind of method disconnected for the power battery detected in systems in which, this system disposition has two electric power networks interconnected by DC-to-DC (DC/DC) converter, this battery belongs to one of these two networks and this converter allows battery recharge, that is, be connected can be this battery recharge.
More generally say, the control of this converter is configured to: guarantee energy to be supplied to the network comprising this battery when this converter runs, and to make when this converter un-activation this battery for this battery recharge and then can be this network energy supply.
A kind of predetermined voltage signals is added to and is delivered in the DC voltage component of the network comprising this battery by this converter, and measure electric current through this battery by searching for the intensity signals corresponding with added voltage signal wherein, this battery for confirmation is properly connected to this network.
This system can be such as electric motor vehicle or hybrid moto vehicle.This converter can be configured to make to go up at certain time intervals to this battery recharge, and this battery is this network energy supply during the other time interval of necessity, and this battery defines a part for this network.The rated operational voltage of the network be associated with this battery is preferably lower than the rated voltage of another network.This another network preferably includes the second battery of the rated voltage with increase.In this article, unless otherwise stated, term " battery " automatically refers to and belongs to by converter to be provided with the battery of the network (that is, having the network of lower rated voltage) of voltage.The network with relative-high voltage rated can comprise battery, but this battery is then preferably referred to by term " the second battery ".
According to advantageous embodiment, the voltage signal added and the strength signal searched for are periodic signals.
These signals can be such as alternating cycles signal or the periodic signal with constant sign.The amplitude of these voltage signals preferably reduces the rated voltage lower than being carried out the network of energy supply by this converter and this battery, and such as, for the network of rated voltage close to 14V, this amplitude is less than 2V.The amplitude of this voltage signal can such as be included between 0.2V and 1.5V, preferably between 0.2V and 0.5V.The frequency of these periodic signals can such as be included between 20Hz and 100Hz.The frequency of these periodic signals can be constant.According to another variant, can send the periodic signal of AD HOC, the induction current noise such as making it obtain can respond to the pattern of the induction current noise produced close to the regular alternating current generator by combustion powered vehicle.So can use for this vehicle with alternator the signal strength detection strategy developed.
According to particularly advantageous embodiment, the voltage signal added is to predetermined symbol, amendment to voltage levvl, and this strength signal is the variation of predetermined symbol, strength level.This is to predetermined symbol, sudden change to voltage levvl, and this strength signal be predetermined sign, variation to strength level.The amplitude of the variation of this voltage levvl preferably reduces lower than the rated voltage by this converter and the network by this battery-powered.Such as, can be applied between 0.2V and 2V and the voltage step be preferably incorporated between 0.2V and 1V.
According to an embodiment, only when the absolute value of the intensity through this battery is lower than intensity threshold, just add this voltage signal and this current signal of search.This intensity threshold is preferably constant.Such as, if the duration continuing to be greater than time threshold through the absolute value of intensity of this battery keeps below this intensity threshold, then can activate this alternating current voltage component of this interpolation, as long as and this intensity the just lasting this interpolation of this intensity threshold can be kept below.
According to another variant, if through the absolute value of intensity of this battery lower than this intensity threshold, then the supply voltage of the circuit comprising this battery can be reduced, to cause this battery output current in the network when being connected with its network.So, just make it likely detect its potential connectivity to the simple reading of the electric current through this battery.
According to an embodiment, corresponding strength signal do not detected with the addition of this voltage signal after, increase the amplitude of this voltage signal, and do the detection trial made new advances.Can produce and the single of the amplitude of voltage signal is increased, or several amplification level in succession tested can be provided.
This voltage signal may be added to the set-point value controlling this output voltage converter.The output voltage of this converter means at this voltage being delivered to the network comprising this battery by this converter.
According to another embodiment, this voltage signal can be produced by special resonant circuit and may be added on the output voltage of this converter.
The invention allows for a kind of motor vehicles being equipped with two electric power networks, these two electric power networks are had two different voltage levvls and are interconnected by DC-to-DC (DC/DC) converter.This converter is configured to this battery recharge, and this vehicle comprises the estimation device for the strength of current through this battery.The current sensor that this estimation device is preferably connected directly between the negative terminal of this battery and ground (that is, without any other electrical appliance or the tie point of electrical appliance between the ground and the terminal of this battery of this circuit) or be connected directly between the positive terminal of this battery and ground.
This vehicle comprises and is delivered to the device in the DC voltage of this battery by this converter for predetermined voltage signals being added to and comprises the filtering device that can detect the current signal corresponding with added voltage signal in the strength signal measured by this strength estimator.Correspond to the term of " strength signal " to mean when this battery is correctly connected to this network normally with this voltage signal send and the intensity signals that obtains.Typically, if this voltage signal is periodic, then this strength signal can be have substantially the same frequency periodic.If this voltage signal is voltage levvl sudden change, then this strength signal can be being biased prearranged signals being biased, depending on the symbol that this voltage levvl changes to intensity curve before.
This vehicle can comprise electronic control unit, and this electronic control unit is configured to: activate this interpolation voltage signal when the absolute value of the strength of current through this battery is brought down below intensity threshold.If keep below intensity threshold through on duration on (such as more than 1 second) predetermined lasting time or 1 and 5s of the absolute value of the intensity of this battery, this intensity threshold depends on the degree of accuracy of current measuring device and can such as be included between 0.5A and 2A, just preferably activates this interpolation voltage signal.
This electronic control unit is advantageously configured to: if even if this voltage signal has added in the VD of this converter by the duration continuing to be greater than a duration threshold also this strength signal do not detected, then send an alert message.Alert message such as can be shown to driver or can send with sound.Although the alert message of this electronic control unit can cause performing safeguard measure thus allow this battery of driver to disconnect also can arrive at its destination safely, such as, forbid turning off the electric power networks carrying out the network power supply for this battery by means of this converter.These safeguard measures can comprise makes the idling of Thermal Motor raise.These safeguard measures can comprise: such as, if this Thermal Motor uses by this battery powered starter motor, then during the temporary shut down of this vehicle, and " stop and starting " program of no thoroughfare Thermal Motor auto stop.
Accompanying drawing explanation
By reading the following declaratives that provide separately through the mode of non limiting example and with reference to accompanying drawing, further object of the present invention, feature and advantage will become more clear, in the accompanying drawings:
-Fig. 1 is the schematic diagram of the vehicle be equipped with according to pick-up unit of the present invention,
-Fig. 2 is the schematic diagram of the electric system of the vehicle 1 be equipped with according to pick-up unit of the present invention, and
-Fig. 3 is the simplified example of the operative algorithm according to detection system of the present invention.
Embodiment
As in FIG show, vehicle according to the invention comprises the first electric power networks 3 and the second electric power networks 2, first electric power networks 3 or high voltage network run with significantly larger voltage, such as, at least than this second network 2 or " low pressure " network 2 large 1.5 times and the voltage of preferred large twice substantially.
In illustrative example, vehicle 1 is the vehicle of " light hybrid " type, that is this vehicle comprises and can make the Thermal Motor 5 of this vehicle movement forward and comprise at least one electrically powered machine 6, and this electrically powered machine connects some wheels of this vehicle can contribute to make this vehicle advance to providing motor torque as motor.Electrically powered machine 6 also plays a part generator, such as, to reclaim electric energy or play the part of the role of alternator thus power to electric power networks 2 for recharging relevant needs to the management or battery BT of energy in ' regeneration ' deboost phase process.
This Thermal Motor can typically be associated with starter motor 8; when this Thermal Motor is shut down, this starter motor can mechanically make this Thermal Motor start to rotate, and does not especially have for electric power networks 3 (BattHT11 and electrically powered machine 6) situation that can be used for the necessary power guaranteeing this Thermal Motor 5 cold post-start.Starter motor 8 is such as powered by secondary network 2.
According to other variant, Thermal Motor 5 can not be associated with starter motor 8 and can be directly started by the electrically powered machine 6 being connected to high voltage network 3, and ensure that the above other function enumerated.
Second electric power networks 2 is connected to low pressure ground 21 and is powered by the first A-battery 10.A-battery 10 can such as have the rated operational voltage be included between 12 and 13 volts.First high-tension electricity network 3 comprises high-tension battery 11 and is connected to high pressure ground 22, and this high pressure ground may be identical ground with low pressure ground 21.
When not having other current sources (such as when not by electrically powered machine 6 generation current), high voltage network 3 is powered by battery 11.DC to DC converter 4 (" DC/DC converter ") is arranged between secondary network 2 and high voltage network 3 direct current can be sent to secondary network 2 from high voltage network 3.Converter 4 controls by electronic control unit 12, this electronic control unit and then be provided with low-tension current by second network 2.Converter 4 can comprise by hardware solution or the alternating-voltage generator 13 that provided by the strategy be incorporated in control software design, and it is superimposed that this makes its DC voltage likely making to be sent to the second secondary network 2 and Amplitude Ration be sent to the AC compounent forced down in the direct current of network 2.
During converter 4 is less than the stage sending electric current to second network 2, this network is powered by A-battery 10 separately.Second secondary network 2 typically comprises multiple low-voltage electrical appliance (such as allow driver control vehicle and access the man-machine interface 23 of the multiple different order of vehicle) and comprises the other electrical appliance contributing to driver and comfort of passenger, and these electrical appliances 14 such as may comprise heating system, sound system and may comprise Vehicle security system (such as brake system or contouring system and direction or visibility backup system).
A-battery 10 is connected to strength estimator 7 (being such as connected to current sensor 7), and this strength estimator is screwed the negative terminal to battery 10.The value of the intensity I measured by current sensor 7 is passed to electronic control unit 12.
In the embodiment of showing in FIG, electric pressure converter 4 comprises signal generator 13, and this signal generator can revise the output voltage of this converter 4, and in other words, converter 4 is applied to it and is connected voltage between these terminals used with the second secondary network 2.Signal generator 13 can such as be configured to periodic signal (such as the signal of AC signal or another kind of type) to be added on the output voltage of this converter, such as promptly and continue that predetermined lasting time ground applies output voltage biased.
Fig. 2 schematically illustrates the operation according to detection system of the present invention, makes it likely detect A-battery 10 and whether is still connected to secondary network 2.Can see the multiple elements shown in Fig. 1 in fig. 2, identical element is referred to by identical reference number.Illustrate only a part for this secondary network in fig. 2, and the output terminal of converter 4.
In example shown in fig. 2, converter 4 is controlled, so that by VD U by sending set point Ucons by electronic control unit 12
sbe delivered to secondary network 2.This DC voltage U
sbe sent to the first input end of totalizer 18, the second input end of totalizer 18 receives the voltage U of being sent by alternating-voltage generator 16
var, this alternating-voltage generator is arranged at the outside of converter 4.This alternating-voltage generator 16 is such as powered by converter 4 or is directly powered by battery 11.
Therefore, secondary network 2 passes through voltage U at the output of totalizer 18
bTpower, this voltage has DC component and amplitude oscillating component, and this amplitude oscillating component is reduce compared with the mean value of this DC component.But, selected amplitude makes it can produce the variation with the substantially the same frequency of electric current I through A-battery 10, the amplitude of this strength of current vibration can be depended on its degree of accuracy to detect by current sensor 7, the amplitude of such as about 1A or the amplitude (such as between 1 and 3A) of several amperes.
Electronic control unit 12 is configured to: when battery 10 is correctly connected to secondary network 2, especially when the positive terminal 9 of this battery is connected to the output terminal of this DC/DC converter and the negative terminal of battery 10 is correctly connected to low pressure ground 21, can detect this AC compounent of electric current I.When during battery 10 is with its multiple terminal, any one terminal and network 2 disconnect, the alternating current component corresponding with the AC signal of the voltage sent by alternating-voltage generator 16 no longer may pass described battery.
Current sensor 7 can such as be arranged between the negative terminal of battery 10 and low pressure ground 21.According to other variants, this current sensor can directly be arranged in battery 10+terminal place.
In order to disturb the operation of low-voltage electrical appliance within bounds, when the absolute value of the electric current detected by current sensor 7 is greater than intensity threshold, can be that this secondary network source of supply is in the DC voltage of converter 4.During higher than this intensity threshold, depend on the sign of this intensity and can be expected that, electric current is exported to these electrical appliances 14 or receives charging current from converter 4 by this battery, and therefore priori is connected to network 2.
During lower than this threshold intensity, can be expected that, all electrical appliances of this DC/DC converter to network 2 are sent electric power supply and not to be recharged battery 10 or this battery is not correctly connected to network 2.During lower than this threshold intensity, therefore electronic control unit 12 can activate and produce AC signal U
varand the filtering simultaneously performed the strength signal I from current sensor 7, so that search wherein and ac voltage signal U
varcorresponding alternating current component.
According to some variants, the ac voltage signal U of the first amplitude can be added in a first step
varand if this amplitude cannot make it to obtain the testing result to respective intensities signal, then can increase this signal U in one or many ground
varamplitude, continue search simultaneously and correspond to the signal of strength level measured by galvanometer 7.As signal U
varamplitude when reaching certain value and Strength Changes signal still do not detected, then electronic control unit 12 such as can activate and alarm is sent to driver to warn the bad connection of this battery and can activate emergency operating pattern, in this emergency operating pattern, converter 4 keeps activating until the order of this vehicle all stops preventing this vehicle from becoming and lose locomotivity reaching its destination.
In certain embodiments, can by the same electronic control unit being connected to current sensor 7 to control this voltage signal, thus the amplitude of these voltage signals can be controlled by the feedback of vibrating based on any strength of current, and thus avoid the deviation that these strength of current is vibrated.
Fig. 3 is the simplicity of illustration in algorithm 20 form of the operational mode of electronic control unit 12, and whether effectively, rightly this electronic control unit allows described unit estimating battery 10 to be connected to network 2.As in the algorithm 20 of Fig. 3 show, electronic control unit 12 performs test 21 termly, to check whether the absolute value through the intensity of this battery is greater than threshold value I
min.
If this absolute value is kept above intensity threshold I
min, then this electronic control unit continue monitoring this intensity absolute value and do not activate DC/DC converter 4 output produce ac voltage signal.
When the absolute value of this intensity becomes less than or equal to intensity threshold I
mintime, that is, when test 21 is for time negative, perform step 22.Then electronic control unit analyzes the signal of current sensor 7 so that the search strength signal corresponding with prearranged signals wherein, this prearranged signals be directly produced by DC/DC converter or by device generation voltage is added in the output voltage of DC/DC output terminal.If this intensity signals (in this case signal " I interchange ") detected, then electronic control unit is back to step 21 and continues the absolute value of monitoring through the strength of current of this battery.If this intensity signals do not detected; then this electronic control unit can go to step 25; wherein; this battery of this electronic control unit warning driver disconnects; and wherein, this electronic control unit activates necessary safeguard measure to allow vehicle to advance until this driver considers that it has arrived its destination and has required that vehicle stops clearly.
According to other variants, if this electronic control unit does not detect searched for intensity signals in the process of test 22, then described unit can go to step 23, and in this step, this electronic control unit controls the amplitude being increased in the voltage signal of the output of DC/DC.
Whether the amplitude that then this control module such as can detect this voltage signal in step 24 has reached the threshold value not wishing to be exceeded.If reach most favorable signal amplitude and this strength signal still do not detected, then provide alarm 25 to warn driver that this battery disconnects.Otherwise, once add the amplitude of this voltage signal, be then back to step 22, in this step, searched for this strength signal so that whether measuring current strength signal becomes specifically and can detect.
The present invention is not limited to these described exemplary embodiments and can provides with many variants.These two networks interconnected by this DC/DC converter can run by substantially equal rated voltage by similar rated voltage or even.
For good and all can send this predetermined voltage signals superposed with the DC voltage of this DC/DC converter.When the absolute value of the intensity through this battery drops to lower than a certain threshold value, only predetermined voltage signals can be sent when multiple time interval.
According to another variant, weak AC compounent can be sent continuously, and if corresponding strength signal can not be detected, then can increase the amplitude of this component.Exchanging degree component can be searched for continuously, or search for specific currents strength signal when can only be reduced under the average absolute value of this intensity below a certain threshold value.This voltage signal be added in the VD of this converter can be periodic signal, the signal of constant frequency or through selecting the sophisticated signal of some feature copying the current noise usually produced by alternator.Voltage signal U
varthe voltage increment (that is, comprising rising front) that can be periodicity non-alternating signal or apply with the form of time slot, to attempt to detect the strength of current increment with corresponding sign.Such as, therefore the intensity signals of searching for will be non-alternating, so and by the change of the absolute value of the intensity of this electric current of search.In other words, preferably as quickly as possible by applying voltage rise forward position or decline forward position and increase or reducing the voltage (with the effect of this voltage change of limit on the electrical appliance of network 2) sent by converter 4, thus set up this magnitude of voltage with new constant value.Preferably changed by this quick voltage controlling the amendment of set-point voltage to be provided by this converter by electronic controller 12.It can be in this DC/DC converter, integrate this amendment of converter output voltage that acceptable substitutes solution.
The advantage of this signal type of the latter is, it can allow the disconnection detection strategy implementing to simplify, this is that it only comprises detection non-zero current, in response to this process of the output voltage of converter 10, battery 10 must make self-discharge to guarantee the continued power of network 2 or to depend on that selected voltage process is come for self charging.If the amplitude changing the output voltage of this converter can keep being little and be enough to detect the response of this battery simultaneously, then this signal type can also make the interruption produced at the electrical appliance place of secondary network 2 minimize.
The system connected for detecting bad battery according to the present invention makes it likely warn this battery of driver whether by incorrect connection and make it likely the program of this vehicle operating of protection be implemented completely, thus allows driver do not use A-battery and arrive safely its destination.
Claims (10)
1. the method disconnected for the power battery (10) detected in systems in which, this system disposition has two electric power networks (2 interconnected by a DC-to-DC (DC/DC) converter (4), 3), this battery (10) belongs to one of these two networks (2), and this converter (4) is configured to recharge this battery (10), it is characterized in that, a predetermined voltage signals (U
var) be added to the DC voltage component (U being delivered to this network (2) comprising this battery (10) by this converter (4)
s) in, and be, the electric current (I) through this battery (10) searches for wherein and added voltage signal (U
var) a corresponding intensity signals (I
exchange) mode measure, this battery (10) for confirmation is properly connected to this network (2).
2. detection method as claimed in claim 1, wherein, the voltage signal (U added
var) and the strength signal (I that searches for
exchange) comprise multiple periodic signal.
3. detection method as claimed in claim 1, wherein, the voltage signal added is to predetermined symbol, amendment to voltage levvl, and this strength signal is the variation of predetermined symbol, strength level.
4. as claimed any one in claims 1 to 3 detection method, wherein, only at the absolute value of the intensity (I) through this battery (10) lower than an intensity threshold (I
min) time, just add this voltage signal (U
var) and this current signal of search (I
exchange).
5. detection method according to any one of the preceding claims, wherein, with the addition of this voltage signal (U
var) and corresponding strength signal (I do not detected
exchange) after, increase the amplitude of this voltage signal, and make the new try detecting this intensity signals.
6. detection method according to any one of the preceding claims, wherein, this voltage signal obtains in the set-point value by a signal being added to the output voltage controlling this converter (4).
7. the detection method according to any one of claim 1 to 5, wherein, this voltage signal (U
var) be produced by a special resonant circuit (16) and be added to the output voltage (U of this converter (4)
s) in.
8. motor vehicles (1), these motor vehicles are equipped with two electric power networks (2 interconnected by a DC-to-DC (DC/DC) converter (4), 3), this converter (4) is configured to recharge this battery (10), this vehicle comprises an estimation device (7) of the intensity for the electric current (I) through this battery (10), it is characterized in that, this vehicle comprises for a predetermined voltage signals being added to the device be delivered to by this converter (4) in a DC voltage of this battery (10), and can detect in the strength signal (I) measured by this strength estimator (7) and the voltage signal (U added
var) a corresponding intensity signals (I
exchange) filtering device.
9. vehicle as claimed in claim 8, comprise an electronic control unit (12), this electronic control unit is configured to: when the absolute value of the strength of current (I) through this battery (10) is brought down below an intensity threshold (I
min) time activates and add this voltage signal (U
var).
10. the vehicle as described in one of claim 8 or 9, wherein, this electronic control unit (12) is configured to: if even if the duration continuing to be greater than a duration threshold by this voltage signal (U
var) add the VD (U of this converter to
s) in this strength signal (I do not detected yet
exchange), then send an alert message.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1358125 | 2013-08-22 | ||
| FR1358125A FR3009869B1 (en) | 2013-08-22 | 2013-08-22 | METHOD FOR DETECTING A POWER BATTERY DISCONNECTION IN A MOTOR VEHICLE |
| PCT/FR2014/051586 WO2015025089A1 (en) | 2013-08-22 | 2014-06-25 | Method for detecting a disconnection of a power supply battery of a motor vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105556320A true CN105556320A (en) | 2016-05-04 |
| CN105556320B CN105556320B (en) | 2019-08-30 |
Family
ID=49949779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480051241.7A Active CN105556320B (en) | 2013-08-22 | 2014-06-25 | Method for detecting the disconnection of the supplying cell of motor vehicles |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3036549A1 (en) |
| JP (1) | JP6306185B2 (en) |
| CN (1) | CN105556320B (en) |
| FR (1) | FR3009869B1 (en) |
| WO (1) | WO2015025089A1 (en) |
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| CN113039448A (en) * | 2018-09-13 | 2021-06-25 | 美达系统有限公司 | System for checking electrical insulation in a converter of an electric vehicle |
| TWI790496B (en) * | 2019-11-12 | 2023-01-21 | 日商東芝股份有限公司 | Charging device, battery diagnosis system and charging method |
| DE102021131645A1 (en) | 2021-12-01 | 2023-06-01 | Audi Aktiengesellschaft | Method for evaluating an electrical connection of an electrical energy store with an on-board network, and electronic battery evaluation system and vehicle |
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| DE102015008445A1 (en) * | 2015-06-30 | 2017-01-05 | Audi Ag | Method and operation of an electrical system of a motor vehicle and motor vehicle |
| DE102016216845A1 (en) | 2016-09-06 | 2018-03-08 | Robert Bosch Gmbh | Device and method for detecting a missing electrical connection of an energy storage device with a power supply system, in particular an electrical system of a motor vehicle |
| FR3057672B1 (en) * | 2016-10-19 | 2020-05-01 | Renault S.A.S. | CONFIRMATION OF THE 12-VOLT BATTERY DISCONNECTION DIAGNOSIS OF AN ON-BOARD NETWORK WITH PILOT ALTERNATOR |
| JP6610504B2 (en) * | 2016-10-31 | 2019-11-27 | トヨタ自動車株式会社 | Power supply system |
| TWI613117B (en) * | 2017-01-17 | 2018-02-01 | 三陽工業股份有限公司 | Judgment method of power saving |
| FR3073684B1 (en) * | 2017-11-16 | 2021-03-12 | Valeo Equip Electr Moteur | ELECTRIC MACHINE FOR A MOTOR VEHICLE INCLUDING A CURRENT SENSOR |
| FR3085486B1 (en) | 2018-08-29 | 2021-01-15 | Renault Sas | METHOD AND SYSTEM FOR DETECTION OF A SHORT-CIRCUIT OR OF AN OPEN CIRCUIT OF A 12V BATTERY DURING A RUNNING PHASE OF A MOTOR VEHICLE |
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Also Published As
| Publication number | Publication date |
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| FR3009869A1 (en) | 2015-02-27 |
| JP6306185B2 (en) | 2018-04-04 |
| FR3009869B1 (en) | 2016-10-21 |
| WO2015025089A1 (en) | 2015-02-26 |
| JP2016528870A (en) | 2016-09-15 |
| EP3036549A1 (en) | 2016-06-29 |
| CN105556320B (en) | 2019-08-30 |
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