BATTERY-DRIVEN MOTOR VEHICLE COMPRISING AN EVALUATION OF THE CONSUMPTION OF AN ELECTRICAL CONSUMER CONNECTED IN MULTIPLEXING, METHOD AND PROGRAM BASED ON SUCH A VEHICLE

Abstract

The invention relates to a motor vehicle comprising an electrical circuit which comprises a traction battery, an electrical consumer connected in a multiplexed network, and an activation means activating or deactivating the electrical consumer. According to the invention, an evaluation means evaluates the current consumption of the consumer in the event of activation, in a driving or charging situation in connection (C3), on the basis of the battery current, of the various network constraints. The invention also relates to a method and a program based on such a vehicle. Figure 2

Description

Title of the invention: BATTERY-DRIVEN MOTOR VEHICLE INCLUDING AN EVALUATION OF THE CONSUMPTION OF AN ELECTRICAL CONSUMER CONNECTED IN MUL TIPLEXING, METHOD AND PROGRAM BASED ON SUCH A VEHICLE

[0001] The invention relates to the field of electrical circuit architectures of motor vehicles with traction batteries, as well as evaluations of electrical consumption of electrical consumers of these architectures.

[0002] These architectures generally comprise a high-voltage electrical circuit connected to the traction battery. The electrical circuit comprises at least one so-called high-voltage electrical consumer, which communicates only in read mode with a multiplexed network of the vehicle. This type of consumer does not communicate with the vehicle's computers.

[0003] This type of configuration does not allow the calculator to have information on the electrical consumption of consumers. This influences the calculator's current demands in the event of recharging by recovery or recharging at a charging station.

[0004] An objective of the present invention is to remedy the defects of the prior art, and in particular to propose a solution for the precise evaluation of current consumption for this type of electrical consumer in a multiplexed network.

[0005] To achieve this objective, the invention proposes a motor vehicle comprising an electrical circuit which comprises a traction battery, an electrical consumer connected in a multiplexed network, and an activation means activating or deactivating the electrical consumer, characterized in that the vehicle further comprises an evaluation means evaluating the current consumption of the consumer in the event of activation, in a driving situation or in a connected charging situation, by the equations: ÎEn-or = hium - VBiCorrected ( « ) = K*iError ( n ) + icon^ted ( « - 1 ) and in case of activation, in other situations, by the equation: îcorreetetM = k:orreeted(n 1 Î-hvb: the instantaneous current of the battery; iElUm: the battery current limit which takes into account the constraints on the high voltage side; icon-ected ■ the estimated current of the electrical consumer; and Kj; an integral action coefficient.

[0006] By "charging connection" or "charging in connection" is meant an electrical connection of the battery to an external current source so as to allow the battery to be charged. We can speak of "Plug-In" in English.

[0007] Advantageously, the invention proposes a solution making it possible to accurately evaluate the consumer's current consumption. Furthermore, this makes it possible to correct current demands in the event of charging by recovery or at a terminal.

[0008] Preferably, the evaluation means evaluates the current consumption of the consumer in the event of deactivation, by the equation: ^Corrected

[0009] This allows it to be adapted to the case where the consumer is disabled.

[0010] Preferably, the vehicle further comprises at least one auxiliary consumer, at least one electrical machine and a first means of requesting current from said electrical machine in the recovery phase, and the first current demand means demands a corrected current based on the equation: = ^Aux + ^ElUm + ^Conected^^ 1 ' 'c current requested by the first means of request; Auxiliary: the current of the said auxiliary consumer.

[0011]

[0012] This allows the current required from the electric machine to be accurately corrected in the event of recovery charging. Preferably, the vehicle further comprises at least one or said auxiliary consumer, a charger or means for connection to a charging terminal, and a second means for requesting current from the charger or the charging terminal, and the second current demand means demands a corrected current based on the equation: ■Chrm iReq Req lAux , i^ux + ^ElLim "l" ^Corrected) : the current requested by the second means of request; : the current of said auxiliary consumer.

[0013] This makes it possible to precisely correct the current requested at the terminal in this load case.

[0014] The invention further relates to a method for evaluating the consumption of an electrical consumer connected to a multiplexed network in a motor vehicle according to the invention, characterized in that it comprises at least one evaluation step in which the current consumption of the consumer is evaluated in the event of activation, in a driving or charging situation in connection (C3), by the equations: ^Ermr = 'iHVBlCorrM (n) = K ( / ï) + iC„rected (« - 1) and in CHS activation, in other situations, by the equation: ^orreetedW = ^Corrected ( « ~ 0aVeC : Îhvb: the instantaneous current of the battery; lElLim ■ the battery current limit which takes into account the constraints on the high voltage side; icorrected '■ the estimated current of the electrical consumer; and K, ; an integral action coefficient.

[0015] Preferably, in said evaluation step, the current consumption of the consumer in the event of deactivation is evaluated, by the equation: ^Corrected

[0016] Preferably, the method is implemented for a vehicle further comprising at least one auxiliary consumer, at least one electrical machine, and it comprises a step of requesting current from said electrical machine in the recovery phase, in which a corrected current is requested on the basis of the equation: ^Req — ^Aux ' ^ElLim ' ^Conected : the current requested by the first means of request; ^Aux: the current of said auxiliary consumer.

[0017] Preferably, the method is implemented for a vehicle further comprising at least one or said auxiliary consumer, a charger or a means of connection to a charging terminal, and it includes a current request step from the charger or charging station, in which a corrected current is requested based on the equation: •Chren -Chren. • , • , ■ \with • ^Req — ' ^Aux^ ^Correctedq hieq9” ' 'c current requested by the second means of request; : the current of said auxiliary consumer.

[0018] Another subject of the invention relates to a computer program comprising program code instructions for executing the steps of the evaluation method according to the invention, when said program operates on a computer.

[0019] The invention will be further detailed by the description of non-limiting embodiments, and on the basis of the appended figures illustrating variants of the invention, in which: - [Fig.l] schematically illustrates the implementation of a means of activating a motor vehicle according to an embodiment of the invention; - [Fig.2] schematically illustrates an evaluation of current consumption of a consumer of the motor vehicle according to the embodiment.

[0020] The invention relates to a means for evaluating the consumption of an electrical consumer on the high voltage side, such as a power take-off device (or "Electric Power Take-Off" in English or abbreviated ePTO) like the Thermoking El000 reference refrigerant, which does not communicate with the computers of the hybrid or electric vehicle.

[0021] The computer of this high-voltage consumer is only in read mode on the vehicle's multiplexed network, the CAN network.

[0022] This type of consumer can be controlled by performing A activations / NA deactivations in different usage circumstances, and allows the management of electrical energy on the high voltage side.

[0023] With reference to [Fig.l], we construct an authorization signal for activation / deactivation of the ePTO electrical consumer which will have two states: - deactivation: NA prohibition of ePTO consumer activation; - activation: authorization A for activation of the ePTO electrical consumer.

[0024] In [Fig.l], Cl represents the circumstances in which the electrical consumer is activated A or deactivated NA.

[0025] Specifically concerning the management of electrical energy on the high voltage side, since this ePTO electrical consumer does not send its electrical consumption in current / power, this risks having an impact on the battery life and the charging time in connection (mode 2 or mode 3 or mode 4). In order to avoid these risks, the consumption of this electrical consumer will be estimated via the process illustrated in [Fig.2]:

[0026] Reference C2 relates first to a hypothesis of activation A authorized for a given time. If negative at C2, the current is not corrected (reference NC). If affirmative at C2, the method comprises another hypothesis C3 relating to whether the vehicle is currently driving or charging in connection.

[0027] If so, the current is corrected (reference C) according to the following formulas: ^Error ^ElLim ^HVBi(jorrected^.^ ^Errork^') + î'Corrected(V'~ 1)

[0028] And if not, the corrected current is taken from the previous value (PC reference) according to the following formula: ÎCorrectedW = k^reetedk^ : Ihvb: the instantaneous battery current; ^EiLim: the battery current limit which takes into account all the constraints on the high voltage side; and

[0029] icorrected ■ The estimated current of the electrical consumer; and Ki; an integral action coefficient. This current is used to construct the current required by the electrical machines in the recovery phase: i^L = iA + iElL.. +ic td; and the current requested from the charger or charging station in connection: ■Chrgn • / '-Chrgn, ■ . • \ iReq ~ ' ^HVAux~^~ ^ElLim. ^Correeted)

[0030] This method can be used for any electrical consumers that communicate with the vehicle's computers only in read mode.

[0031] The invention further relates to a program for implementing a method as described above. The program can be loaded into the memory of a controller of the motor vehicle, for example in a controller of the electrical consumer.

Claims

Claims

1. Motor vehicle comprising an electrical circuit which comprises a traction battery, an electrical consumer connected in a multiplexed network, and an activation means activating (A) or deactivating (NA) the electrical consumer, characterized in that the vehicle further comprises an evaluation means evaluating the current consumption of the consumer in the event of activation, in a driving or charging situation in connection (C3), by the equations: ^Error ^EILim AvBi(yorrecfedA} Kj ^Error^A ^CorrectedÇ^~ 0 and in the event of activation, in the other situations, by the equation: ICorrecteAn) = k^recteA™ ~ 0aveC: Îhvb: the instantaneous current of the battery; ^ElLîm: the limit current of the battery which takes into account the constraints on the high voltage side; icorrected: the estimated current of the electrical consumer; and Ki: an integral action coefficient.

2. Motor vehicle according to claim 1, characterized in that the evaluation means evaluates the current consumption of the consumer in the event of deactivation, by the equation: i ~ i ~ 0

3. f Correct ed v Motor vehicle according to any one of claims 1 to 2, further comprising at least one auxiliary consumer, at least one electrical machine and a first means for requesting current from said electrical machine in the recovery phase, characterized in that the first current request means requests a corrected current on the basis of the equation: Al'EL _ * . * « r ïAvpc • Req ^Aux ' ^ElLùn ' Correcîed AAA: 1e current requested by the first request means; Îaux: the current of said auxiliary consumer.

4. Motor vehicle according to any one of claims 1 to 3, further comprising at least one or said auxiliary consumer, a charger or means for connection to a charging terminal, and a second means for requesting current from the charger or the charging terminal, characterized in that the second means for requesting current requests a corrected current based on the equation: •Chren -Chren • , . ■ \with • ^Req ~ ' ^Aux + ^ElLim + ^Corrected} i^q8”: the current requested by the second means of request; Iaux: the current of the said auxiliary consumer.

5. Method for evaluating the consumption of an electrical consumer connected to a multiplexed network in a motor vehicle according to any one of claims 1 to 4, characterized in that it comprises at least one evaluation step in which the current consumption of the consumer is evaluated in the event of activation, in a driving or charging situation in connection (C3), by the equations: ^Error-^EILim~ ^HVBÎCot.rected(n) - Kf'iError[n) i CorrecteAn ~ 0 and in the event of activation, in the other situations, by the equation: ÎCürrectedW ~ : Ïhvb: the instantaneous current of the battery; ^ElLim: the limit current of the battery which takes into account the constraints on the high voltage side; icm-rected: the estimated current of the electrical consumer; and Kj; an integral action coefficient.

6. Evaluation method according to claim 5, characterized in that in said evaluation step, the current consumption of the consumer in the event of deactivation is evaluated, by the equation: î ~~~ 0

7. ^Corrected v Evaluation method according to any one of claims 5 to 6, for a vehicle further comprising at least one auxiliary consumer, at least one electrical machine, characterized in that it comprises a step of requesting current from said electrical machine in the recovery phase, in which a corrected current is requested on the basis of the equation: iReq ~ lAux + lElLim + Kdrreclxd ' ÎReqL ' 'c current requested by the first request means; i-Aux: the current of said auxiliary consumer.

8. Evaluation method according to any one of claims 5 to 7, for a vehicle further comprising at least one or said auxiliary consumer, a charger or a means of connection to a charging terminal, characterized in that it comprises a step of requesting current from the charger or at the charging terminal, in which a corrected current is requested on the basis of the equation: •Chren ___•{•Chron • , • , ■ \with • iReq ~ ' ^Aux + ^EILim + ^Corrected) ÎReq8" ' 'c current requested by the second means of request; 'Aux: the current of said auxiliary consumer.

9. A computer program comprising program code instructions for carrying out the steps of the evaluation method according to any one of claims 5 to 8, when said program is running on a computer.

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