FR3063390A1 - METHOD AND DEVICE FOR MONITORING THE CHARGE OF A BATTERY OF A VEHICLE PARKING ON A PARKING - Google Patents

Abstract

A method is dedicated to monitoring the current state of charge of a battery (BA) of a vehicle (V) placed in a parking mode on a parking lot, and comprising a monitoring device (DS) capable of estimating a current state of charge of this battery (BA). This method comprises a step in which, when a person triggers an electric ignition of the vehicle (V), the current state of charge of the battery (BA) is determined, and if this state of charge is lower than a first predefined threshold, it triggers a first predefined alert of that person by a human / machine interface of the vehicle (V), so that person connects a battery charger to the battery (BA) to recharge the latter (BA).

Description

Holder (s): PEUGEOT CITROEN AUTOMOBILES SA Société anonyme.

Extension request (s)

Agent (s): PEUGEOT CITROEN AUTOMOBILES SA Public limited company.

METHOD AND DEVICE FOR CONTROLLING THE STATION PARKING ON A PARKING

CHARGING A VEHICLE BATTERY

FR 3 063 390 - A1 (5r) A method is dedicated to checking the current state of charge of a battery (BA) of a vehicle (V) placed in a parking mode on a parking lot, and comprising a monitoring device (DS) capable of estimating a current state of charge of this battery (BA). This method comprises a step in which, when a person triggers an electric ignition of the vehicle (V), the current state of charge of the battery (BA) is determined, and, if this state of charge is less than a first predefined threshold, a first predefined alert of this person is triggered by a man / machine interface of the vehicle (V), so that this person connects a battery charger to the battery (BA) in order to recharge the latter (BA).

BA

DS

C1

DC

METHOD AND DEVICE FOR MONITORING THE CHARGING STATE OF A BATTERY OF A VEHICLE PARKING ON A PARKING SPACE

The invention relates to vehicles, possibly of the automobile type, and comprising at least one battery, and more precisely the control of the state of charge of their battery.

Some vehicles may sometimes be parked in a parking lot for a long period (typically from several weeks to a year) waiting to be transferred or used. This is particularly the case for vehicles which have just been manufactured in a factory of an automobile manufacturer, and which are grouped together in a fleet.

Sometimes, the battery of one of these vehicles may run down while it is placed in a parking mode on its parking lot. Therefore, to prevent the state of charge from becoming too low, which could permanently damage the battery, it is necessary to periodically monitor the state of charge of the batteries. This monitoring is currently carried out by a technician, vehicle after vehicle, using an external device which he must connect to the diagnostic socket, sometimes

0 located in the powertrain area under the hood. This external device is intended to determine from a vehicle computer the current state of charge of the battery, which is regularly estimated by a monitoring device. When the device signals that the state of charge is too low, the technician must move the vehicle in order to go and recharge its battery in a workshop.

Each vehicle monitoring phase requires the external device to be connected to the diagnostic socket (possibly preceded by the opening of the door dedicated to the driver to unlock the hood closing mechanism, followed by the opening of the hood. ), then

0 waiting for the state of charge to be obtained, then disconnecting the external device and possibly closing the cover, which is tedious and time-consuming.

It has certainly been proposed in patent document FR 2827711 to equip each vehicle with communication means by waves intended to periodically transmit the current state of charge of the battery, estimated by the monitoring device and supplied by a vehicle computer.

But this solution leads to additional costs for vehicles and periodic consumption of the energy stored in the battery, which helps to discharge it faster. In addition, this solution requires a permanent analysis by a technician, by means of a computer, of the states of charge transmitted by the vehicle communication means, which turns out to be expensive.

The invention therefore aims in particular to improve the situation.

To this end, it proposes a method, dedicated to checking the current state of charge of a battery of a vehicle which is placed in a parking mode on a car park, and which comprises an i5 monitoring device suitable for estimating a state of charge in progress for this battery.

This control method is characterized by the fact that it includes a step in which, when a person triggers an electric ignition of the vehicle, the current state of charge of the battery is automatically determined, and, if this state of charge is less than a first predefined threshold, we

0 triggers a first predefined alert of this person via a man / machine interface of the vehicle, so that this person connects a battery charger to the battery in order to recharge the latter.

Thus, a simple ignition of the vehicle, allows the person to know almost immediately whether or not to recharge the vehicle battery, without having to at least connect an external device to the diagnostic socket of the vehicle.

The control method according to the invention may include other characteristics which can be taken separately or in combination, and in particular:

0 - in its stage, it is possible to trigger a first predefined alert of the person by displaying a message on a screen of the man / machine interface and / or broadcasting a sound message by at least one loudspeaker of the 'Human Machine Interface ;

> for example, the message displayed can be representative of a so-called vehicle energy saving mode in which only vehicle security components are authorized to operate (such as a communication device for emergency calls) ;

- in its stage, a second predefined alert for the person can be triggered during recharging by the man / machine interface when the state of charge has become greater than a second predefined threshold, greater than the first threshold, or when the duration of the recharging is greater than a third predefined threshold, then an electrical standby of the vehicle can be triggered so that the person disconnects the battery charger from the battery;

> the second predefined threshold can be between 80% of a maximum state of charge and 90% of this maximum state of charge. For example, the second predefined threshold can be equal to 85% of the maximum state of charge;

> the third predefined threshold can be between two hours and twelve hours. As an example, the third predefined threshold can be equal to three hours;

- the first predefined threshold can be between 55% of the state of charge

0 maximum and 75% of this maximum charge state. For example, the first predefined threshold can be equal to 65% of this maximum state of charge. The invention also provides a control device intended to equip a vehicle placed in a parking mode on a car park and comprising a battery and a monitoring device suitable for estimating a state of charge in progress of this battery. This control device is characterized in that it is arranged, when a person triggers an electric ignition of the vehicle, to determine the current state of charge of the battery, and, if this state of charge is less than one first predefined threshold, to trigger a first predefined alert of this person by a

0 man / machine interface of the vehicle, so that this person connects a battery charger to the battery in order to recharge the latter.

The invention also provides a vehicle, possibly of the automobile type, capable of being placed in a parking mode on a car park, and comprising a battery, a monitoring device capable of estimating a current state of charge of this battery, and a control device of the type presented above.

Other characteristics and advantages of the invention will appear on examining the detailed description below, and the attached drawings, in which:

FIG. 1 schematically and functionally illustrates an example of a vehicle comprising a battery associated with a monitoring device and a computer provided with an exemplary embodiment of a control device îo according to the invention, and

FIG. 2 schematically illustrates an example of an algorithm implementing a control method according to the invention.

The object of the invention is in particular to propose a control method, and an associated DC control device, intended to control the current state of charge of a battery BA of a vehicle V which is placed in a parking mode. on a parking lot.

It is considered in what follows, by way of nonlimiting example, that vehicle V is of the automobile type. This is for example a car. However, the invention is not limited to this type of vehicle. It concerns everything

0 vehicles with at least one battery and able to park in a parking lot for a long period (typically several weeks to a year) while waiting to be transferred or used. Consequently, the invention relates to all land vehicles (cars, motorcycles, electric bikes, utility vehicles, coaches (or buses), trucks, road vehicles, construction machines, handling vehicles).

There is diagrammatically shown in FIG. 1 a vehicle V (here of automobile type) comprising a battery BA, associated with a monitoring device DS, and a control device DC according to the invention.

It is considered in what follows, by way of nonlimiting example, that the

0 BA battery is of very low voltage type (for example 12 V, 24 V or 48 V), and that it is intended to supply electrical energy to supply electrical equipment of vehicle V, for example when the alternator of the latter (V) is not in operation. In this case, the battery BA is for example coupled, via a DC / DC type converter, to a starter responsible for launching (or operating) a thermal engine of the powertrain (or GMP) of vehicle V when the driver performs a request to activate the GMP by means of a "key" or a start button (or "push"). However, in an alternative embodiment, the BA battery could be of the low voltage type (for example around 220 V) and charged with supplying electrical energy, possibly via an inverter, an electric type driving machine belonging to the GMP (hybrid or all electric) of vehicle V.

îo In the following, it is considered, by way of nonlimiting example, that vehicle V comprises a conventional powertrain (or GMP) (that is to say neither hybrid, nor all electric). The GMP therefore includes a heat engine (not illustrated) responsible, when a person has started the vehicle V using his key or his start button, to provide torque for at least one train of the vehicle V via a means of coupling and a gearbox.

The DS monitoring device is suitable for (or responsible for) estimating a state of charge (or “State of charge”) during the battery BA of the vehicle V. For this purpose, this DS monitoring device can, for example and like

0 illustrated without limitation, be secured to the BA battery. It (DS) monitors the voltage level at rest of the BA battery and includes a coulomb counter (BA battery current) to estimate the evolution of the state of charge of the BA battery. It may, for example, include a sensor responsible for measuring the voltage across the terminals of the battery BA, which voltage is representative of the state of charge. These voltage measurements are for example transmitted to a computer of the vehicle V, such as that which is sometimes called “intelligent service box” (or BSI).

As indicated above, the invention proposes in particular to implement a method intended to control the state of charge during the

0 battery BA of vehicle V, when the latter (V) is placed in a parking mode on a car park. For example, this car park can be a car park located on a site comprising a factory of an automobile manufacturer.

This implementation can be done by means of a DC control device which can, as illustrated without limitation in FIG. 1, be installed in a computer C1, which can, possibly, provide at least one other function within the vehicle V This C1 computer can, for example, be the intelligent service box (or BSI). But it is not compulsory. Indeed, the DC control device could be arranged in the form of a computer dedicated to the control of the charge state and comprising a dedicated program. Consequently, a DC control device according to the invention can be produced in the form of software modules (or computer modules (or “software >>”), or else electronic circuits (or “hardware”), or still a combination of electronic circuits and software modules.

The method (of control), according to the invention, comprises a step which is triggered each time a person initiates an electric ignition (or switches on the ignition, without starting the internal combustion engine) of the i5 V vehicle using his key start-up. This person is for example a technician responsible for checking the current state of charge of the batteries of at least some of the vehicles which are placed in a parking mode in the car park.

During the process stage, when the person has triggered

0 the electric ignition of the vehicle V, one (and more precisely the DC control device of the latter (V)) automatically determines the current state of charge of its battery BA. For example, this determination can be made with the BSI which receives the voltage measurements (representative of the state of charge of the battery BA) from the monitoring device DS. Then, if this state of charge is less than a first predefined threshold s1, one (the DC control device) triggers a first predefined alert of this person by a man / machine interface EA of the vehicle V, so that this person connects a charger from battery to BA battery in order to recharge the latter (BA).

0 Thus, by simply switching on the vehicle V, the person knows almost immediately whether or not to recharge the battery BA of the vehicle V. This advantageously makes it possible to avoid the connection of an external device to the diagnostic socket. of vehicle V (possibly preceded by the opening of the door dedicated to the driver to unlock the closing mechanism of the hood of vehicle V, followed by the opening of this hood), then waiting for the status to be obtained charging, then disconnecting the external device (and possibly closing the cover). In other words, the invention saves time, and therefore reduces the cost of control.

For example, the first predefined alert may consist of a first text message or a first thumbnail displayed on a screen of a man / machine interface EA of the vehicle V and / or a first sound message broadcast by at least one loudspeaker. vehicle interface man / machine speaker.

Such a first text message or first sound message can, for example, be "insufficient state of charge (or share)". As a variant, a displayed message (text or thumbnail) can be representative of a so-called energy saving mode of the vehicle V in which only the latter's safety members (V) are authorized to operate.

The screen can be, for example and as illustrated without limitation, that of the central handset which is installed in or on the dashboard of vehicle V. Alternatively, it can be the screen of the handset EA of the control panel on board vehicle V or part of the windscreen of vehicle V which is used

0 by a head-up display.

For example, the first predefined threshold s1 can be between 55% of a maximum state of charge of the battery BA and 75% of this maximum state of charge. In this case, the first predefined threshold s1 can, for example, be equal to 65% of this maximum state of charge. This first threshold s1 corresponds, for example, to a voltage across the battery BA equal to 12.5 V (measured by the monitoring device DS for a few hundred milliseconds).

Note that in the process step, we (the DC control device) can trigger during a recharge a second predefined alert of

0 the person via the man / machine interface EA when the state of charge of the battery BA has become greater than a second predefined threshold s2, greater than the first threshold s1, or when the duration of recharging is greater than a third threshold s3 predefined. Then, one (the DC control device) can initiate an electric standby of the vehicle V so that the person can safely disconnect the battery charger from the battery BA. This option is intended to further facilitate the task of the person performing the control, since it allows him to perform at least one other task (such as checking the state of charge of the battery of another vehicle) during waiting for the second alert for vehicle V.

For example, the second predefined alert can consist of a second text message or a second thumbnail displayed on a screen of the man / machine interface EA of the vehicle V and / or a second audio message broadcast by at least one loudspeaker. -speaker of vehicle V. Such a second text message or second audible message can, for example, be "recharging completed". As a variant, the second predefined alert may consist of an end of the first alert (for example the end of the display of the first message (text or thumbnail) or of the broadcast of the first sound message).

Also for example, the second predefined threshold s2 can be between 80% of the maximum state of charge and 90% of the maximum state of charge. In this case, the second predefined threshold s2 can, for example, be equal to 85% of this maximum state of charge.

0 Also for example, the third predefined threshold s3 can be between two hours and twelve hours. In this case, the third predefined threshold s3 can, for example, be equal to three hours.

There is schematically illustrated in FIG. 2 a nonlimiting example of algorithm implementing a control method according to the invention.

In a sub-step 10, a person wishing to control the state of charge of the battery BA of the vehicle V triggers an electric ignition of the latter (V), for example by means of the starting key, but without starting the internal combustion engine . This triggering causes the C1 computer power supply and therefore the device operation

0 DC control.

In a sub-step 20, the DC control device automatically determines the current state of charge of the vehicle battery BA (for example with the BSI (of which it may be part)). Then, it performs a test in order to determine whether this state of charge is less than the first predefined threshold s1 (for example equal to 65% of the maximum state of charge).

In the affirmative, the control device DC performs a sub-step 30 in which it triggers a first predefined alert of the person carrying out the control, via a man / machine interface EA of the vehicle V.

In a sub-step 40, the person connects a battery charger to the BA battery in order to recharge the latter (BA).

îo Then, in a sub-step 50, the control device DC triggers a second predefined alert of the person via the man / machine interface EA when the state of charge of the battery BA has become greater than the second predefined threshold s2 (with s2> s1 - for example s2 = 85% of the maximum state of charge), or when the duration of recharging is greater than the third predefined threshold s3. Then, the DC control device triggers an electric standby of the vehicle V.

Finally in a sub-step 60 the person disconnects the battery charger from the battery BA.

On the other hand, if the result of the test carried out in substep 20 indicates

0 that the current state of charge of the battery BA is greater than the first threshold s1, then the control device DC triggers an electrical standby of the vehicle V in a substep 70.

The control process will be re-triggered in the event of a new electrical ignition of vehicle V, during the control of the next state of charge.

The invention offers several advantages, including:

- it avoids the connection and use of an external device to the diagnostic socket,

- it allows the person performing the checks to save time, which leads to a reduction in the cost of the check,

0 - it allows a better robustness of the charge state diagnosis,

- it constitutes a generic solution for all users of the ίο vehicle (in the factory, vehicle parking lot, or after-sales service).

Claims (10)

1. Method for checking the current state of charge of a battery (BA) of a vehicle (V) placed in a parking mode on a car park, and comprising a monitoring device (DS) suitable for estimating a state of charge in progress of said battery (BA), characterized in that it comprises a step in which, when a person triggers an electric ignition of said vehicle (V), the state of charge in progress of the battery (BA), and, if this state of charge is less than a first predefined threshold, a first predefined alert of said person is triggered by a man / machine interface (EA) of said vehicle (V), so that said person connects a battery charger to said battery (BA) in order to recharge the latter (BA). 2. Method according to claim 1, characterized in that in said step a first predefined alert of said person is triggered by display of a message on a screen of said man / machine interface (EA) and / or broadcasting of a message audible by at least one speaker of said man / machine interface. 3. Method according to claim 2, characterized in that said displayed message is representative of a so-called energy saving mode of said vehicle (V) in which only safety members of said vehicle (V) are authorized to operate. 4. Method according to one of claims 1 to 3, characterized in that in said step is triggered during a recharge a second predefined alert of said person by said man / machine interface when said state of charge has become greater than a second threshold predefined, greater than said first threshold, or when the duration of said recharging is greater than a third predefined threshold, then an electrical standby of said vehicle (V) is triggered so that said person disconnects said battery charger from said battery (BA) . 5. Method according to claim 4, characterized in that said second predefined threshold is between 80% of a maximum state of charge and 90% of said maximum state of charge. 6. Method according to one of claims 4 and 5, characterized in that said third predefined threshold is between two hours and twelve hours. 7. Method according to one of claims 1 to 6, characterized in that 5 said first predefined threshold is between 55% of a maximum state of charge and 75% of said maximum state of charge. 8. Control device (DC) for a vehicle (V) placed in a parking mode on a car park and comprising a battery (BA) and a monitoring device (DS) suitable for estimating a state of charge during said said battery (BA), characterized in that it is arranged, when a person triggers an electrical ignition of said vehicle (V), to determine the current state of charge of said battery (BA), and, if this state of charge is less than a first predefined threshold, for triggering a first predefined alert of said person by a man / machine interface (EA) of said vehicle (V), of i5 so that said person connects a battery charger to said battery (BA) to recharge it (BA). 9. Vehicle (V) suitable for being placed in a parking mode on a car park and comprising a battery (BA) and a monitoring device (DS) suitable for estimating a state of charge in progress of said battery (BA), 2 0 characterized in that it further comprises a control device (DC) according to claim 8. 10. Vehicle according to claim 9, characterized in that it is of the automobile type. 1/1 BA DS C1 DC