MOTOR VEHICLE COMPRISING A UNIT THAT DETERMINES THE ACTIVE PHASES AND PERFORMS A DIAGNOSTIC OF THESE PHASES, PROCESS AND PROGRAM BASED ON SUCH A VEHICLE

Abstract

The invention relates to a battery-powered motor vehicle comprising: - a charging connector (1) connected to an on-board charger which is connected to the battery and to a single-phase or three-phase power source (6), including a temperature sensor (2) for each phase connection; - a current (7) and / or voltage (8) measuring device for each phase connection; - a communication unit (4) receiving the maximum charging power; - a diagnostic unit (5) connected to said sensors (2), measuring the temperature and performing diagnostics via said sensors (2). During the charging phase, the diagnostic unit (5) determines the phases in use by comparing the voltage and / or current of each phase connection and / or the power to respective thresholds; and performs the diagnosis of the active phase(s). The invention also relates to a method and a program based on such a vehicle. Figure 1

Description

Title of the invention: MOTOR VEHICLE COMPRISING A UNIT DETERMINING THE ACTIVE AND PERFORMING A DIAGNOSIS OF THESE PHASES, PROCESS AND PROGRAM BASED ON SUCH A VEHICLE

[0001] The invention relates to the field of battery electric vehicles or hybrid vehicles. The invention relates more particularly to the configuration of a charging connector (or "charging socket" in English) for such vehicles.

[0002] The AC charging of electric or hybrid vehicles of the PHEV type can implement a one or three phase charging connector depending on the configuration of the on-board charger.

[0003] A single-phase connector generally has two temperature sensors for the AC pins (neutral, phase), while a three-phase connector generally has four temperature sensors for the AC pins (neutral, phase 1, phase 2, phase 3).

[0004] Diagnosing these sensors generally requires configuration to disable diagnosis of temperature sensors that are not in use.

[0005] Deactivating these sensors results in a variety of calibrations and additional configuration operations which may lead to misconfiguration and quality or safety problems (especially when diagnostics are not enabled for other sensors).

[0006] An objective of the present invention is to remedy the defects of the prior art, and in particular to offer a solution to limit poor calibrations and quality and safety problems.

[0007] To achieve this objective, the invention proposes a motor vehicle comprising: - an electrical machine; - a traction battery connected to the electric machine; - a charging connector connected to an on-board charger which is connected to the traction battery so as to allow charging of the traction battery when the charging connector is connected to a single-phase or three-phase electrical current source, the load connector comprising two phase connections receiving single-phase electric current, or four phase connections receiving three-phase electric current, of which two phase connections receive single-phase electric current, the load connector comprising a temperature sensor for each of the phase connections; - a current measuring device connected to the load connector so as to measure the current of each phase connection; and / or a voltage measuring device connected to the load connector so as to measure the voltage of each phase connection; - a communication unit connected to the charging connector, configured to receive a signal from the current source related to the maximum charging power, - a diagnostic unit connected to the temperature sensors, measuring the temperature and performing diagnostics via the temperature sensors, the diagnostic unit being connected to the communication unit, the current measuring device and the voltage measuring device via a communication network, in which, during the charging phase, the diagnostic unit determines the phases in use by comparing the voltage of each phase connection to a voltage threshold above which the corresponding phase connection is active; and / or by comparing the current of each phase connection to a current threshold above which the corresponding phase connection is active; and / or by comparing the maximum charging power to a power threshold above which all phases are active, The diagnostic unit performs the diagnosis of the active phase(s).

[0008] Advantageously, the invention makes it possible to reduce the diversity of calibrations, and to avoid quality and safety problems related to bad configurations.

[0009] Preferably, the motor vehicle includes a controller which includes the communication unit and the diagnostic unit.

[0010] This allows for the centralization of detection, communication and diagnostics.

[0011] Preferably, the motor vehicle includes a measuring unit connected to the current measuring device and / or the voltage measuring device, the diagnostic unit being further connected to the measuring unit via the communication network.

[0012] This allows for the separation of detection, communication and diagnostics.

[0013] Preferably, the motor vehicle further includes a storage means connected to the diagnostic unit, the diagnostic unit registers a three-phase load and then activates a diagnostic on all temperature sensors regardless of the load connection.

[0014] This allows the implementation of a definitive diagnostic mode adapted to one- or three-phase loads.

[0015] The invention further relates to a method for controlling the charge of a motor vehicle according to the invention, during charging where a current source is connected to the vehicle's charging connector, the charging control process includes the following steps: - measure the current and / or voltage of each phase connection; - receive a communication signal from the current source relating to the maximum load power; - determine the phases in use by comparing the voltage of each phase connection to a voltage threshold above which the corresponding phase connection is active; and / or by comparing the current of each phase connection to a current threshold above which the corresponding phase connection is active; and / or by comparing the maximum load power to a power threshold above which all phases are active, - to diagnose the active phase(s)

[0016] Preferably, the load control method further includes a storage step in which a three-phase load is recorded; and a final activation step of the diagnostic on all temperature sensors regardless of the load connection.

[0017] Another object of the invention relates to a computer program comprising program code instructions for executing the steps of the load control method according to the invention, when said program is running on a computer.

[0018] The invention will be further detailed by the description of non-limiting embodiments, and on the basis of [Fig.1] which schematically illustrates an electronic system architecture of a vehicle charging connector according to a preferred embodiment of the invention.

[0019] The invention proposes a motor vehicle which includes an electric machine, and a traction battery connected to the electric machine.

[0020] The vehicle further includes a charging connector 1 connected to the traction battery (via an on-board OBC charger) so as to allow the traction battery to be recharged when the charging connector 1 is connected to an electrical power source 6. The charging current can be single-phase or three-phase.

[0021] The load connector 1 comprises four phase connections capable of receiving a three-phase electric current (neutral, phase 1, phase 2, phase 3). Two of these phase connections can receive a single-phase electric current (neutral, phase).

[0022] Furthermore, the load connector 1 includes a temperature sensor 2 for each of the phase connections, i.e. four temperature sensors.

[0023] The motor vehicle further includes a current measuring device 7 connected to the charging connector 1 so as to measure the current of each connection phase. The current measuring device 7 is preferably connected to a first electronic unit 3 called the "measuring unit".

[0024] The motor vehicle further includes a voltage measuring device 8 connected to the charging connector 1 so as to measure the voltage of each phase connection. The voltage measuring device 8 is preferably connected to the first electronic measuring unit 3.

[0025] The motor vehicle further comprises a communication unit 4 (second electronic unit, referred to as the "communication unit") connected to the charging connector 1, configured to receive a signal from the current source 6 when connected to the charging connector. The signal relates to the maximum charging power of the source 6 and preferably to the voltage measured by the voltage measuring device 8.

[0026] The motor vehicle further includes a diagnostic unit 5 (third electronic unit referred to as "diagnostic") connected to the temperature sensors 2. The diagnostic unit 5 measures the temperature and performs diagnostics via the temperature sensors 2.

[0027] As can be seen in [Fig.1], the electronic units (diagnostic unit 5, communication unit 4, measurement unit 3) are connected together via a communication network R.

[0028] In the context of the invention, during the charging phase, the diagnostic unit 5 determines the phases in use. To do this, the diagnostic unit 5 compares the voltages and / or currents of each phase connection to a voltage threshold and / or a current threshold, and / or the maximum charging power to a power threshold.

[0029] If the voltage of a phase connection is greater than the voltage threshold, then the corresponding phase connection is active. Otherwise, the corresponding phase connection is inactive.

[0030] If the current in a phase connection is greater than the current threshold, then the corresponding phase connection is active. Otherwise, the corresponding phase connection is inactive.

[0031] If the maximum load power is greater than the power threshold, then all phase connections are active.

[0032] Thus, the diagnostic unit 5 performs the diagnosis of the connection(s) of active phases.

[0033] In one variant, the functionalities of the three electronic units 3, 4 and 5 can be used in two units or a single unit such as a controller.

[0034] Once the diagnostic unit 5 has determined that the charging connector has a 3-phase definition, this information can be recorded to activate the diagnostic on all temperature sensors 2 for the next charging phases, even if these charging phases use only two-phase connections.

[0035] The invention further relates to a method and a program for implementing the elements described above. The method includes a step of measuring the current and / or voltage of each phase connection.

[0036] The method further includes a step of receiving a communication signal from the current source 6 relating to the maximum load power.

[0037] The process further includes a step of determining the phases used by carrying out one or more of the following comparisons: - compare the voltage of each phase connection to a voltage threshold above which the corresponding phase connection is active; - compare the current of each phase connection to a current threshold above which the corresponding phase connection is active; - compare the maximum charging power to a power threshold above which all phases are active.

[0038] The process then includes a diagnostic step of the active phase(s).

Claims

1. Demands Motor vehicle comprising: - an electrical machine; - a traction battery connected to the electric machine; - a charging connector (1) connected to an on-board charger which is connected to the traction battery so as to allow charging of the traction battery when the charging connector (1) is connected to a source (6) of single-phase or three-phase electric current, the charging connector (1) comprising two phase connections receiving single-phase electric current, or four phase connections receiving three-phase electric current, of which two phase connections receive single-phase electric current, the charging connector (1) comprising a temperature sensor (2) for each of the phase connections; - a current measuring device (7) connected to the load connector (1) so as to measure the current of each phase connection; and / or a voltage measuring device (8) connected to the load connector (1) so as to measure the voltage of each phase connection; - a communication unit (4) connected to the charging connector (1), configured to receive a signal from the current source (6) relating to the maximum charging power, - a diagnostic unit (5) connected to the temperature sensors (2), measuring the temperature and performing diagnostics via the temperature sensors (2), the diagnostic unit (5) being connected to the communication unit (4), the current measuring device (7) and the voltage measuring device (8) via a communication network (R), in which, during the charging phase, the diagnostic unit (5) determines the phases in use by comparing the voltage of each phase connection to a voltage threshold above which the corresponding phase connection is active; and / or by comparing the current of each phase connection to a current threshold above which the corresponding phase connection is active; and / or by comparing the maximum charging power to a power threshold above which all phases are active, The diagnostic unit (5) performs the diagnosis of the active phase(s).

2. Motor vehicle according to claim 1, characterized in that it comprises a controller which includes the communication unit (4) and the diagnostic unit (5).

3. Motor vehicle according to claim 1, characterized in that it comprises a measuring unit (3) connected to the current measuring device (7) and / or the voltage measuring device (8), the diagnostic unit (5) being further connected to the measuring unit (3) via the communication network.

4. Motor vehicle according to any one of claims 1 to 3, further comprising a storage means connected to the diagnostic unit (5), the diagnostic unit (5) recording a three-phase charge and then activating a diagnostic on all temperature sensors (2) regardless of the charge connection.

5. A method for controlling the charging of a motor vehicle according to any one of claims 1 to 4, during charging where a current source (6) is connected to the charging connector (1) of the motor vehicle, the charging control method comprising the following steps: - measuring the current and / or voltage of each phase connection; - receiving a communication signal from the current source (6) relating to the maximum charging power; - determining the phases in use by comparing the voltage of each phase connection to a voltage threshold above which the corresponding phase connection is active; and / or by comparing the current of each phase connection to a current threshold above which the corresponding phase connection is active; and / or by comparing the maximum charging power to a power threshold above which all phases are active, - diagnosing the active phase(s).

6. A load control method according to claim 5, characterized in that it further comprises a storage step in which a three-phase load is recorded; and a final activation step of the diagnostic on all temperature sensors regardless of the load connection.

7. A computer program comprising program code instructions for performing the steps of the process of controlling charge according to any one of claims 5 to 6, when said program is running on a computer.

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