FR2962265A1 - Battery managing method for e.g. electric/hybrid car, involves transmitting battery related data to memory of server during battery charging phase in battery managing station, where data comprise temperature and state of charge of battery - Google Patents

Abstract

A method for managing a battery (2) for driving a motor vehicle (1), characterized in that it comprises the following steps: - storage as a function of time of data related to the battery (2) during certain phases of use of the motor vehicle; - Transmission of battery related data stored in a memory of a central server (20) during a charging phase of the battery in a battery management station (11).

Description

The present invention relates to a method and device for managing a battery-type energy container on an electric motor vehicle. Subsequently, the term battery will be used for a reason of simplification.

Some motor vehicles, such as electric or hybrid vehicles, include a battery for powering an electric drive motor. The disadvantage of this solution comes from the low autonomy of such a battery, which regularly requires recharging or change.

The object of the invention is to provide a solution for improving the performance of a battery of a motor vehicle.

For this purpose, the invention is based on a method for managing a driving battery of a motor vehicle, characterized in that it comprises the following steps: - storage as a function of time of data related to the battery during certain phases of use of the motor vehicle; transmission of the data related to the battery stored in a memory of a central server during a charging phase of the battery in a battery management station.

The battery related data may include the battery temperature and state of charge and an identifier of the battery and / or the supplier of each battery and / or the location of the battery. The method of managing a battery may comprise the following steps: storage of the temperature and state of charge of the battery in time during a driving phase of the motor vehicle, storage in time of the temperature and the state of charge of the battery during parking of the motor vehicle, - storage in time of data representing the history of the charging phases of the battery.

The method of managing a battery may comprise a periodic activation of the parked motor vehicle to memorize the temperature and state of charge of its battery. The method of managing a battery may comprise a phase of charging the battery in the battery management station and the transmission of the stored data related to the battery during this charging phase. The method of managing a battery may comprise a step of dismounting the battery of the motor vehicle in the battery exchange station, then its connection to a battery charger, the transmission of data linked to the battery being carried out from a memory associated with the battery via the charger. The method of managing a battery comprises a first step of transmitting the stored battery-related data to a supervisory unit of the battery management station and a second step of transmitting said data from the battery management unit. the management station up to the memory of the central server.

The invention also relates to a method of managing a motor vehicle battery bank, characterized in that it implements the management method of each battery of the park as described above. The invention also relates to a data storage medium readable by a computer on which is recorded a computer program comprising code means computer program implementation of the steps of the method as described above.

The invention also relates to a device for managing a driving battery of a motor vehicle, characterized in that it comprises means for connecting to a memory comprising data related to the battery of a motor vehicle, means for transmitting data to the memory of a central server and means implementing a battery management method as described above. The means for transmitting data to the memory of a central server may comprise at least one fieldbus for a first transmission to a supervision unit of a battery management station, then a digital network of the Internet type for a second transmission to the memory of the central server. The battery management device may comprise a plurality of battery chargers associated with a CAN bus-type fieldbus for a data transmission from a memory associated with a battery to a battery charger, and a fieldbus connection. each loader to a supervisory unit of a management station.

These objects, features and advantages of the present invention will be set forth in detail in the following description of a particular embodiment made in a non-limiting manner with reference to the appended figures among which: FIG. 1 represents a motor vehicle according to a embodiment of the invention.

FIG. 2 represents a battery management device according to an embodiment of the invention.

The concept of the invention is based first of all on a memorization of certain data related to the battery, relevant for its performance, in real situation, that is to say during any real use of the motor vehicle, for example in a phase of operation of the vehicle, in a parking phase, and / or when charging the battery, to enable learning and diagnosis of its operation. Then, this data storage is exploited by its regular transmission to a central server, which performs an intelligent processing of this data and then allows for example to establish a diagnosis of the state and performance of a certain battery, detect its failures, improve and optimize its operation, etc. For this reason, the invention ultimately relies on a method and a device for managing a motor vehicle driving battery, a particular embodiment of which will now be described.

FIG. 1 represents a motor vehicle 1 equipped with a battery 2, removably attached under its floor 3 and connected to an electric traction drive means 4, of the traction type. Alternatively, the battery 2 could be fixed in a different housing on the motor vehicle.

The motor vehicle 1 is further equipped with a computer 5 and at least one memory, not shown, connected to the battery 2, and more exactly to one or more sensors for measuring data relevant to the operation of the battery. In addition, the computer is advantageously connected to the central computer of the motor vehicle, not shown, in order to associate the stored data associated with the battery with certain more general conditions of operation of the motor vehicle. To carry out these storage operations, the motor vehicle is equipped with any software (software) and / or hardware (hardware) means for carrying out the steps of the method which will be detailed hereinafter.

Thus, the method of managing the battery comprises a first step of storing data related to the battery.

Depending on the mode of execution of the battery, during a running phase of the motor vehicle, the temperature and the state of charge of the battery are stored in time. These two pieces of information make it particularly possible to understand the aging of the battery. For this, the battery is equipped with a temperature sensor and comprises a means for measuring its state of charge, in known manner.

Similarly, when parking the motor vehicle, the same data are stored as a function of time. For this purpose, the functions of the motor vehicle necessary for this storage, which are in parking standby of the motor vehicle, are periodically activated.

Finally, the data representing the history of the battery charges are even stored.

Of course, the foregoing data are cited by way of non-limiting example, the concept of the invention can be applied to any measurement or estimation of any data considered relevant to the operation of a vehicle drive battery. automobile. In addition, other invariable data such as a battery identifier, and / or an identifier of the manufacturer or the supplier of the battery may also be on this memory or other memory associated with the battery.

The invention applies to a fleet of motor vehicle training batteries. Indeed, the memorization of data related to a battery, performed on each motor vehicle during its use in real life, allows optimized learning and exploitation on a battery of batteries, in order to obtain a large number of data on which intelligent treatments can be done.

This is why these different data stored for each battery of the battery bank are grouped together on the same memory, for example that of a central server, to form an easily exploitable database. The battery management method thus comprises a second step of transmitting the stored data associated with each battery of the park on a memory of a central server. According to the embodiment of the invention, it is provided that the batteries of each vehicle are removable, in particular to allow their quick and easy exchange in a battery management station. Indeed, when the battery is discharged, the driver stops in such a station and its empty battery is exchanged for a full battery, according to a process similar to a stop in a service station to fill a fuel tank. Alternatively, such a battery could not be replaced but simply recharged. For optimal exploitation of the data related to the battery stored during the use of the motor vehicle, it is interesting that these data are transmitted regularly and quickly to the central server. To achieve this objective, the invention proposes, during stopping phases of motor vehicles in the battery management stations, to combine the recharging of the batteries with the transmission of the data related to the battery stored during the use of the vehicle automobile.

FIG. 2 illustrates an embodiment of the invention according to such an approach. Several battery management stations 11 thus receive batteries 2, which are disassembled from motor vehicles and positioned in the charging phase, by a connection with a battery charger 12.

Each battery management station comprises a plurality of battery chargers 12. According to the embodiment of the invention, each charger 12 is connected to a battery by a CAN bus 13, or even any fieldbus, allowing the transmission of data related to the battery stored during the actual use of the motor vehicle . Then, each charger 12 of the same battery management station is connected to a supervision unit 14 of the station, which receives these different data related to the batteries via the chargers 12, by another fieldbus 15. Finally, each Supervision unit 14 of each battery management station 11 is linked to a central server 20 by a digital network 16, which may be the Internet.

Thus, when the charge of the battery of a motor vehicle is insufficient, the vehicle stops at a battery management station 11. Its empty battery is disassembled to be connected to a charger 12. During its recharging phase, the data related to the battery stored during the use of the vehicle is transmitted via the charger 12 to the supervision unit 14 of the management station of battery. For this, the data is on a memory mounted on the removable battery pack of the motor vehicle. As a note, during this recharging phase, new data representing the charging method of the battery 2 are stored on the memory associated with the battery. Then, this supervision unit 14 transmits these data to a central server 20 of an operating center. This second transmission is performed periodically, for example daily at off-peak hours.

This embodiment has the advantage of combining the data transmission operation with the fast battery charging phase, which avoids adding an additional operation to be performed separately. It also has the advantage of ensuring a regular and frequent download of data, in order to know the state of the battery sufficiently. Finally, it also ensures fast and reliable data transmission to the operations center. As a remark, this method allows at the same time to perform a function of locating the battery, within a battery management station. For this, the transmission to the central server 20 also includes an identifier of the originating station, the location of which is known to the operating center.

Naturally, the invention is not limited to the structure described above. The data transmission means may be different from those mentioned, and the transmission to the central server 20 may use a different circuit than by the charger 12 and / or the supervision unit 14. The transmission of data from a radio station Battery management to the central server can be done by any means of remote communication.

In addition, the same principle could be implemented using non-releasably fixed batteries on a motor vehicle, the memory including the data related to the battery can then be in any area of the motor vehicle, and associated with means for connection with the outside for the transmission of these data, by a means of communication with or without contact.

The central server thus knows with great precision, almost in real time, the status of all batteries in the battery bank and their location. In addition, it can perform statistical calculations, averages for example, on the data transmitted by all battery management stations in the park in order to deduce certain operating rules, an analysis of its aging, its anomalies, etc. . He can thus develop a modeling of the aging of the batteries according to the transmitted parameters such as temperature, etc. This information, aging models, etc., are then transmitted to the various battery management stations of motor vehicles, which use it to establish diagnostics on a given battery.

The invention also relates to a medium comprising a computer program allowing the implementation of all or part of the processes explained above, at the battery management station of motor vehicles and / or at a central server server. an operating center.

Claims (12)

1. A method for managing a battery (2) for driving a motor vehicle (1), characterized in that it comprises the following steps: - storage as a function of time of data related to the battery ( 2) during certain phases of use of the motor vehicle; - Transmission of battery related data stored in a memory of a central server (20) during a charging phase of the battery in a battery management station (11). 2. Method for managing a battery (2) according to the preceding claim, characterized in that the data related to the battery (2) comprises the temperature and the state of charge of the battery (2) and an identifier of the battery (2). battery (2) and / or the supplier of each battery (2) and / or the location of the battery (2). 3. A method of managing a battery (2) according to the preceding claim, characterized in that it comprises the following steps: - storage in time of the temperature and state of charge of the battery during a driving phase of the motor vehicle, - storage of the temperature and the state of charge of the battery during parking time of the motor vehicle, - storage in time of data representing the history of the charging phases of the battery (2). 4. A method of managing a battery (2) according to the preceding claim, characterized it comprises a periodic activation of the automobile vehicle parked to perform the storage of the temperature and the state of charge of its battery (2). 5. Method for managing a battery (2) according to one of the preceding claims, characterized in that it comprises a phase of charging the battery in the battery management station and the transmission of the stored data related to the battery ( 2) during this charging phase. 6. A method of managing a battery (2) according to the preceding claim, characterized it comprises a step of dismounting the battery of the motor vehicle in the battery exchange station, then its connection to a charger (12) of battery, the transmission of data related to the battery being performed from a memory associated with the battery (2) via the charger (12). 7. A method of managing a battery (2) according to claim 5 or 6, characterized it comprises a first step of transmitting the stored data linked to the battery (2) to a supervision unit (14) of the station management (11) of batteries and a second step of transmission of these data from the supervision unit (14) of the management station (11) to the memory of the central server (20). 8. A method of managing a fleet of batteries (2) motor vehicle drive characterized in that it implements the management method of each battery (2) of the park according to one of the preceding claims. 9. Data storage medium readable by a computer on which is recorded a computer program comprising means of computer program codes implementation of the steps of the method according to one of the preceding claims. 10. Device for managing a battery (2) for driving a motor vehicle (1), characterized in that it comprises means for connecting to a memory comprising data related to the battery (2) of a motor vehicle, means for transmitting data to the memory of a central server (20) and means implementing a battery management method (2) according to one of claims 1 to 7. 11. Device for managing a battery (2) according to the preceding claim, characterized in that the data transmission means to the memory of a central server (20) comprises at least one fieldbus for a first transmission to a supervision unit (14) of a battery management station (11), then an Internet-type digital network (16) for a second transmission to the memory of the central server (20). 12. Device for managing a battery (2) according to claim 10 or 11, characterized in that it comprises several battery chargers (12) associated with a bus bus type bus CAN (13) for a transmission of data from a memory associated with a battery (2) to a battery charger (12), and a fieldbus link (15) from each charger (12) to a supervision unit (14) of a management station (11) .25