On-board system for managing a vehicle battery and method of implementation

Abstract

On-board system for managing a battery of a vehicle and method of implementation The invention relates to an on-board system (1) for managing a battery (2) of a vehicle comprising: a plurality of switches (3) respectively associated with power supply circuits (4) of one or more pieces of equipment (5) of the vehicle powered by the battery (2), a control interface (13) connected to each of the switches (3) of the plurality, the control interface (13) being associated with at least one memory means (131) integrating at least one hierarchy of activity states of the vehicle comprising at least two levels, each level of activity state of the vehicle being associated with an actuation equation of a set of at least one switch (3), the control interface (13) being configured to identify the level of activity state of the vehicle and implement the associated actuation equation, the control interface (13) also being configured to, on the one hand,placing the vehicle at a determined activity state level as a function of the actuation of at least one command and / or the measured value of at least one parameter and, on the other hand, removing the vehicle from this determined activity state level for a hierarchically lower level, as a function of at least one command and / or a command fault and / or the measured value of at least one parameter, characterized in that the system (1) also comprises an immediate control interface (14) of at least a second set of at least one switch (3). Figure to be published with the abstract: 1.,

Description

Title of the invention: On-board system for managing a vehicle battery and method of implementation

[0001] The present invention relates to the field of mechanisms for managing the charge level of a vehicle battery and more particularly to the field of systems and methods for regulating the use of the energy of such a vehicle battery.

[0002] In the context of the use of a current vehicle, the operation of some of these elements or devices on board the vehicle relies at least in part on an energy supply emanating directly from an electric battery also on board the vehicle. Usually, the operation of each of these on-board elements takes place via respective specifically dedicated switches which provide interfaces between the power source and the device in operation. In the majority of vehicles currently in circulation, nearly 200 to 300 elements or devices are likely to be powered by an electric battery, whether temporarily or for the entire duration of use of the vehicle.Also, in the absence of recharging, the vehicle's battery is forced to withstand a significant drop in its charge level to ensure the operation of the vehicle's on-board equipment, so that in the absence of actuation of the vehicle's motor, the multiplication of the charges of these on-board elements leads to a limitation of their operating autonomy, or even to a reduction in the vehicle's autonomy level.

[0003] To address this concern for optimizing the energy consumption provided by the electric battery on board the vehicle, management systems on board the vehicle have been developed so as to integrate a mechanism for assigning different operating authorizations assigned to one or more pieces of equipment as a function of one or more hierarchical levels of activity state of the vehicle. Thus, for each level of activity state of the vehicle, the assignment of operating authorizations involves at least one actuation equation which determines the opening or closing of one or more switches to enable the power supply of one or more pieces of equipment of the vehicle via dedicated circuits.However, the implementation of such a mechanism strictly conditions the operation of each of the equipment to one or more activity state levels of the vehicle so that in the absence of the presence of the vehicle in a particular activity state level, the operation of the equipment is prevented. However, in certain cases, for example for safety or even comfort reasons, the operation of one or more equipment is suspected. likely to be necessary if not preferable despite the vehicle's activity state at a level different from that or those provided for the actuation of the opening or closing of one or more switches enabling the power supply of this vehicle equipment.

[0004] The present invention aims to overcome these drawbacks by proposing a solution which allows one or more pieces of equipment on board a vehicle, the actuation of which is conditioned by the activity state of the vehicle positioned at a particular level, the operation of one or more pieces of equipment on board independently of a possible command to modify the activity state level of the vehicle, while maintaining an optimization of the energy consumption provided by an electric battery on board a vehicle.

[0005] The present invention relates to an on-board system for managing a vehicle battery comprising: - a plurality of switches respectively associated with power supply circuits of one or more vehicle equipment powered by the battery, - a control interface connected to each of the switches of the plurality, the control interface being associated with at least one memory means integrating at least one hierarchy of activity states of the vehicle comprising at least two levels, each level of activity state of the vehicle being associated with an actuation equation of a first set of at least one switch, the control interface being configured to identify the activity state level of the vehicle and implement the associated actuation equation,

[0006] the control interface also being configured to, on the one hand, place the vehicle at a determined activity state level as a function of the actuation of at least one command and / or the measured value of at least one parameter and, on the other hand, remove the vehicle from this determined activity state level for a hierarchically lower level, as a function of at least one command and / or a command fault and / or the measured value of at least one parameter,

[0007] characterized in that the system also comprises an interface for immediate control of at least a second set of at least one switch.

[0008] The invention also relates to a method for implementing an on-board system according to the invention, characterized in that the method comprises: - a step of reception by the immediate control interface of at least one command and / or the measured value of at least one parameter, - a step of solving an actuation equation by the immediate control interface by an actuation step of at least one second set of one or more switches.

[0009] The invention will be better understood from the following description, which relates to the preferred embodiments, given as non-limiting examples, and explained with reference to the appended schematic drawing, in which:

[0010] [Fig-1] corresponds to a schematic representation of an example of different elements of an embedded system according to the invention.

[0011] The present invention relates to an on-board system 1 for managing a battery 2 of a vehicle comprising: - a plurality of switches 3 respectively associated with power supply circuits 4 of one or more pieces of equipment 5 of the vehicle powered by the battery 2, - a control interface 13 connected to each of the switches 3 of the plurality, the control interface 13 being associated with at least one memory means 131 integrating at least one hierarchy of activity states of the vehicle comprising at least two levels, each level of activity state of the vehicle being associated with an actuation equation of a first set of at least one switch 3, the control interface 13 being configured to identify the activity state level of the vehicle and implement the associated actuation equation,

[0012] the control interface 13 also being configured to, on the one hand, place the vehicle at a determined activity state level as a function of the actuation of at least one command and / or the measured value of at least one parameter and, on the other hand, remove the vehicle from this determined activity state level for a hierarchically lower level, as a function of at least one command and / or a command fault and / or the measured value of at least one parameter,

[0013] characterized in that the system 1 also comprises an immediate control interface 14 of at least a second set of at least one switch 3.

[0014] The system 1 is based in particular on a mechanism for allocating different operating authorizations assigned to one or more pieces of equipment 5 as a function of a vehicle activity state level. The allocation of operating authorizations involves, for each vehicle activity state level, at least one actuation equation which determines the opening or closing of one or more switches 3 allowing the power supply of one or more pieces of equipment 5 of the vehicle via dedicated circuits 4. The system 1 according to the invention thus also involves a control interface 14 complementary to the control interface 13 configured to operate an actuation of one or more switches 3 corresponding to a second set distinct from the set of switches 3 actuated by the control interface 13. In the system 1 according to the invention, this control interface 14 is thus connected to one or more of the different switches 3 for supplying power to equipment 5 of the vehicle powered by the battery 2. This control interface 14 is then configured to authorize the operation of one or more equipment 5 of the vehicle powered by the battery 2 independently of the operation and the control mechanism implemented by the control interface 13. The control interface 14 is thus able to authorize the operation of one or more equipment 5 of the vehicle even if the vehicle has not reached the activity state level required by the control interface 13 for this operation.

[0015] It should be noted that the battery 2 of the vehicle managed by the on-board system is likely to correspond to the electric accumulator which accompanies a thermal engine and participates in the operation of the starter and various on-board devices or accessories of the vehicle. The battery 2 of the vehicle managed by the on-board system is also likely to correspond to one or more on-board electric accumulators which also participate in the power supply of the vehicle's motorization such as in the context of electric or hybrid vehicles.

[0016] It should be noted that, by way of example, the control interface 13 comprises in particular a computer in association with the memory means 131 and capable of implementing at least one actuation equation of the memory means 131. The control interface 13 also comprises a device for transmitting and transmitting actuation and / or neutralization signals for opening and / or closing the power switches 3 of the equipment 5. The transmission of these signals is thus carried out as a function of the results obtained by the computer when solving an actuation equation by the control interface 13.

[0017] As an example of a preferred implementation, the different levels of activity state of the vehicle are in particular: - a hierarchically lowest activity state level in which the reduction in battery 2 energy consumption is maximum, - a hierarchically highest activity state level in which the vehicle's traction drive is in operation, and, - at least one intermediate activity state level in which the battery 2 is subject to energy consumption for the power supply of one or more pieces of equipment 5 of the vehicle. In this implementation example, it should be noted that the hierarchically highest activity state level corresponds to a vehicle operating mode in which battery 2 is able to be recharged by the vehicle alternator. The intermediate activity state level corresponds to a vehicle operating mode in which one or more pieces of equipment 5 are active without the vehicle's motorization operating. It should also be noted that the hierarchically lowest activity state level is that in which the reduction in the energy consumption of the battery 2 is maximum, that is to say that the processing of the actuation equation of this activity state level of the vehicle by the control interface 13 is configured to operate at most only the opening of the switch 3 associated with the power supply of an on-board clock mechanism of the vehicle.

[0018] According to an example relating to a particular variant of the on-board system 1 according to the invention, the system 1 also comprises at least one sensor 61 associated with the control interface 13, the control interface 13 being configured to take into account at least one measurement value of the sensor 61. According to an exemplary implementation, this at least one sensor 61 is configured to operate the identification of the activity state level of the vehicle. This at least one sensor 61 is in particular configured to operate the transmission of a signal to the control interface 13 so as to allow the identification of at least one change in activity state level within the pre-established hierarchy, in particular a change of state to a higher or lower level. A computer of the control interface 13 is thus able to permanently identify the activity state level of the vehicle.For example, according to a first implementation variant, this identification is carried out from the last signal received from at least one sensor 61 since this signal is specific for the vehicle accessing a particular activity state level. According to a second implementation variant, this identification is carried out from the combination, on the one hand, of the last signal received from at least one sensor 61 and indicating a modification of the activity state level and, on the other hand, the last recorded activity state level. It should be noted that the sensor 61 is likely to take the form of a detector allowing the identification of a parameter or a value of a parameter.Likewise, the sensor 61 is likely to correspond to a trigger associated with or integrated into an actuation command triggered by a user, such as the opening of a vehicle door, or automated such as during an action triggered after the lapse of a predefined duration. According to another exemplary implementation, this at least one sensor 61 is configured to identify a parameter for triggering a change in the activity state level of the vehicle. Indeed, associated with the computer of the control interface 13, the detection of a parameter modification by a sensor 61 triggers the transmission of a signal for changing the activity state of the vehicle and for solving a new actuation equation for the activity state of the vehicle by the control interface 13.

[0019] According to an example relating to an alternative embodiment of the on-board system 1 according to the invention, the system also comprises a mechanism 7 for blocking the modification of the activity state level of the vehicle to a hierarchically lower level. This mechanism 7 is configured to block the closing of one or more switches 3 allowing the power supply of one or more pieces of equipment 5 during operation. This blocking mechanism 7 is thus able to avoid the inappropriate stopping of the operation of one or more pieces of equipment 5, in particular pieces of equipment likely to be of safety or comfort interest, despite a request or a signal to modify the activity state of the vehicle to a level whose associated actuation equation is solved by the closing of a switch 3 for the electrical power supply of one or other of these pieces of equipment 5.Preferably, the blocking mechanism 7 is integrated into the on-board system 1 by being associated with the control interface 13 or with the computer of this control interface, or even integrated into this control interface 13. This integration thus allows the blocking mechanism 7 to influence the operation of the control interface 13 and more particularly the modification of the activity state level of the vehicle and / or the transmission or emission of one or more of the level change control signals. The operation and in particular the action of the blocking mechanism 7 on the other components of the control interface 13 is in particular conditioned, on the one hand, by the presence of one or more equipment 5 in operation and, on the other hand, by the reception of a vehicle activity state level change control signal by the control interface 13.

[0020] According to an example relating to a particular variant of the on-board system 1 according to the invention and capable of being combined with one or other of the previously detailed examples, the system 1 also comprises at least one sensor 62 associated with the blocking mechanism 7. This at least one sensor 62 is configured to operate the identification of the operation of at least one piece of equipment 5 on board the vehicle. The blocking mechanism 7 is also capable of being associated with at least one memory means 71 integrating at least one set of references identifying at least one piece of equipment 5 on board the vehicle for which, when it is in operation, the operation of this at least one piece of equipment 5 must be continued in the absence of identification of a control signal for stopping the operation of the equipment 5 emitted by the user of the vehicle.In this memory means 71, each of the references identifying at least one piece of equipment 5 is associated with a blocking equation configured so that its resolution prevents the change of the activity state level of the vehicle and / or the transmission or emission of one or more of the level change control signals when the level to be reached in the context of the level change is an activity state of the vehicle not allowing the function. operation of the at least one on-board equipment 5 concerned. It should be noted that the at least one memory means 71 is also likely to correspond to a memory means associated or integrated with the control interface 13. This at least one sensor 62 is in particular configured to operate the transmission of a signal to the locking mechanism 7 so as to allow the identification of the operation of at least one on-board equipment 5 of the vehicle. A computer of the control interface 13 and / or of the locking mechanism 7 is associated with the at least one sensor 62 and with the at least one memory means 71 so as to compare the origin of the signal of the operation of the at least one on-board equipment 5 of the vehicle with at least one set of references identifying at least one on-board equipment 5 of the associated memory means 71.Also, in the event of a match identified by the computer and / or by the blocking mechanism 7, the blocking mechanism 7 is actuated to modify the operation of the control interface 13 and more particularly to intervene on the change in the activity state level of the vehicle and / or on the transmission or emission of one or more of the level change control signals.For example, upon receipt of a signal for changing the activity state of the vehicle and solving a new actuation equation for the activity state of the vehicle by the control interface 13 and / or by the computer of the control interface 13, the blocking mechanism 7 and / or its computer checks, on the one hand, the compatibility of the resolution of the actuation equation for the new activity state of the vehicle with the operation of at least one piece of equipment 5 of the at least one set of references recorded in the associated memory means 71 and identifying at least one piece of on-board equipment 5 and, on the other hand, by receiving a signal from a sensor 62, the presence of an activity of the at least one piece of on-board equipment 5 of the vehicle recorded in the memory means 71.It should be noted that the sensor 62 is capable of taking the form of a detector allowing the identification of a parameter or a value of a parameter capable of indicating the operation of the at least one piece of equipment 5 on board and recorded in the memory means 71.

[0021] According to an example relating to another variant embodiment of the on-board system 1 according to the invention and capable of being combined with one or other of the previously detailed variants, the immediate control interface 14 is configured to receive at least one command and / or the measured value of at least one parameter for the actuation of at least a second set of at least one switch 3. This command is capable of being triggered and / or transmitted by the user of the vehicle and / or by a change in operation of one or more pieces of equipment 5 or even by a change in combined operation of several pieces of equipment 5. In the context of a triggering / transmission by a change of operating state of one or more pieces of equipment 5, this change of operating state is likely to be identified by the variation of at least one measured value of one or more respective parameters of equipment 5. At the level of the immediate control interface 14, the reception of this command and / or measured value is likely to be managed by a computer integrated into the immediate control interface 14, this computer also being likely to be associated with at least one memory means 141 of the immediate control interface 14. This at least one memory means 141 integrates at least one set of references identifying one or more pieces of equipment 5 on board the vehicle for which the operation of the equipment 5 and / or the switch 3 allowing the power supply of the equipment 5 is likely to be triggered independently of any level of activity state of the vehicle.In this memory means 141 of the immediate control interface 14, each of the references identifying at least one piece of equipment 5 is associated with an actuation equation configured so that its resolution triggers the opening of the second set of at least one switch 3 so that at least one piece of equipment 5 is powered by the battery 2. By this actuation equation, the triggering of the opening of the second set of at least one switch 3 is based on the verification of one or more conditions corresponding to one or more commands and / or measured values ​​of identified parameters and / or their combination simultaneously or during a predefined period of time.

[0022] According to an example relating to another variant embodiment of the on-board system 1 according to the invention and capable of being combined with one or other of the previously detailed variants, the immediate control interface 14 is connected to at least one sensor 64 for measuring at least one parameter. This at least one sensor 64 is configured to operate the identification and the transmission of a signal to the immediate control interface 14 so as to allow the identification of at least one change in operating state of one or more equipment 5 and / or of the vehicle. A computer of the immediate control interface 14 in association with at least one sensor 64 and possibly a memory means 141 is thus able to permanently monitor the existence and / or the meeting of one or more conditions likely to authorize the resolution of an actuation equation.Thus, in the event of a match identified by the computer and / or by the immediate control interface 14, the immediate control interface 14 solves the actuation equation by actuating or triggering the opening of the second set of at least one switch 3 for the power supply of at least one item of equipment 5 by the battery 2. It should be noted that the sensor 64 is likely to take the form of a detector allowing the identification of a parameter or a value of a parameter. Similarly, the sensor 64 is likely to correspond to a trigger associated with or integrated into a . actuation command triggered by a user, such as the opening of a vehicle door, or automated such as during an action triggered after the lapse of a predefined duration. For example, upon receipt of an activity or activity level signal from one or more particular pieces of equipment 5 of the vehicle, by the immediate control interface 14 and / or by the computer of the immediate control interface 14, the immediate control interface 14 and / or its computer check whether this signal participates in the resolution of an actuation equation recorded in the memory means 141 and, if the conditions are verified, actuate or transmit a signal for actuating the opening of at least one switch 3 for the power supply of at least one piece of equipment 5 by the battery 2.

[0023] According to an example relating to another alternative embodiment of the on-board system 1 according to the invention and capable of being combined with one or other of the previously detailed variants, at least one switch 3 is shared by the first assembly and by the second assembly. According to this alternative embodiment, the same switch 3 allowing the power supply of at least one item of equipment 5 by the battery 2 is thus capable of being actuated, on the one hand, by the control interface 13 as a function in particular of one or more predefined activity state levels of the vehicle and, on the other hand, by the immediate control interface 14 as a function of one or more parameters independent of these predefined activity state levels of the vehicle.

[0024] According to an example relating to another variant embodiment of the on-board system 1 according to the invention and capable of being combined with one or other of the previously detailed variants, the at least one switch 5 of the second set is associated with a power supply circuit of a safety equipment of the vehicle. This safety equipment is capable of corresponding to position lights, or even to hazard lights or even to a triggering mechanism of the airbag. Preferably, this safety equipment is capable of corresponding to any equipment meeting a level of type B or higher of the ASIL (Automotive Safety Integrity Level) classification defined by the ISO 26262 standard as of December 5, 2023.

[0025] According to an example relating to another variant embodiment of the on-board system 1 according to the invention and capable of being combined with one or other of the previously detailed variants, each switch 3 is produced by an integrated switching circuit. Preferably, at least one switch 3 is produced by an integrated circuit of the SMARTMOS™ type. However, any means which has identical or similar properties and capable of performing a similar switching function in the context of the power supply of equipment 5 of a vehicle is conceivable as a switch 3 in the context of an on-board system according to the invention.

[0026] The invention also relates to a method for implementing an on-board system according to the invention, characterized in that the method comprises: - a step of reception by the immediate control interface 14 of at least one command and / or the measured value of at least one parameter, - a step of solving an actuation equation by the immediate control interface 14 by a step of actuation of at least a second set of one or more switches 3.

[0027] According to an example relating to an alternative embodiment of the method according to the invention, the method comprises, prior to the step of solving an actuation equation: - a step of checking the existence and / or the meeting of one or more conditions likely to authorize the resolution of an actuation equation of at least a second set of one or more switches 3.

[0028] Of course, the invention is not limited to the embodiments described and shown in the attached drawings. Modifications remain possible, in particular from the point of view of the constitution of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention.

Claims

Claims

1. On-board system (1) for managing a battery (2) of a vehicle comprising: - a plurality of switches (3) respectively associated with power supply circuits (4) of one or more pieces of equipment (5) of the vehicle powered by the battery (2), - a control interface (13) connected to each of the switches (3) of the plurality, the control interface (13) being associated with at least one memory means (131) integrating at least one hierarchy of activity states of the vehicle comprising at least two levels, each level of activity state of the vehicle being associated with an actuation equation of a set of at least one switch (3), the control interface (13) being configured to identify the level of activity state of the vehicle and implement the associated actuation equation, the control interface (13) also being configured to, on the one hand,placing the vehicle at a determined activity state level as a function of the actuation of at least one command and / or the measured value of at least one parameter and, on the other hand, removing the vehicle from this determined activity state level for a hierarchically lower level, as a function of at least one command and / or a command fault and / or the measured value of at least one parameter, characterized in that the system (1) also comprises an immediate control interface (14) of at least a second set of at least one switch (3).,

2. On-board system (1) according to claim 1, characterized in that the system also comprises a mechanism (7) for blocking the modification of the activity state level of the vehicle to a hierarchically lower level.

3. On-board system (1) according to one of the preceding claims, characterized in that the immediate control interface (14) is configured to receive at least one command and / or the measured value of at least one parameter for the actuation of at least one second set of at least one switch (3).

4. On-board system (1) according to one of the preceding claims, characterized in that the immediate control interface (14) is connected to at least one sensor (64) for measuring at least one parameter.

5. On-board system (1) according to one of the preceding claims, characterized in that at least one switch (3) is shared by the first set and by the second set.

6. On-board system (1) according to one of the preceding claims, characterized in that the at least one switch (3) of the second set is associated with a power supply circuit (4) of a safety device of the vehicle.

7. On-board system (1) according to one of the preceding claims, characterized in that each switch (3) is produced by an integrated switching circuit.

8. Method for implementing an on-board system (1) according to one of claims 1 to 7, characterized in that the method comprises: - a step of reception by the immediate control interface (14) of at least one command and / or of the measured value of at least one parameter, - a step of solving an actuation equation by the immediate control interface (14) by a step of actuation of at least a second set of one or more switches (3).

9. Method according to claim 8, characterized in that the method comprises, prior to the step of solving an actuation equation: - a step of checking the existence and / or the meeting of one or more conditions capable of authorizing the resolution of an actuation equation of at least a second set of one or more switches (3).

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