Method and device for managing the implementation of a braking function of an electric vehicle by means of a redundant braking system

Abstract

The invention relates to a method for managing the implementation of a braking function of an electric vehicle by means of a redundant braking system (100). The braking system comprises primary braking equipment (104), specifically hydraulic braking equipment, and secondary braking equipment (106), specifically regenerative braking equipment. The system (100) comprises a computing device (102) for managing the implementation of the braking function. The invention also relates to a device implementing such a method, as well as to a motor vehicle provided with a braking system (100) comprising such a device (102). Figure for abstract: 1

Description

Title of the invention: Method and device for managing the implementation of a braking function of an electric vehicle by means of a redundant braking system Technical field of the invention

[0001] The present invention relates to the field of braking systems for electric vehicles. The invention relates in particular to a method for managing, by means of a computer device on board an electric vehicle, the implementation of a braking function by means of a redundant braking system which comprises primary braking equipment and secondary braking equipment which operate independently of one another. The invention also relates to a device implementing such a method, as well as a vehicle comprising such a device. The invention applies to electric vehicles, in particular those which operate autonomously. State of the prior art

[0002] Autonomous vehicles are increasingly used in logistics applications, particularly for local delivery (i.e. the last mile). Thus, since such vehicles are intended to operate without any human supervision, it is important that they are equipped with different components or systems that can ensure safety in emergency situations. In particular, the braking system is one of these systems that requires redundancy. It is indeed essential to always be able to stop a vehicle safely, particularly a vehicle that is intended to operate autonomously.

[0003] Until now, redundant braking capabilities were mainly based on the addition of a second independent braking system. However, this solution poses obvious problems related to the manufacturing costs of the vehicles and the size of the equipment required to integrate a second braking system.

[0004] Other existing systems use two separate braking actuators, such as an electric machine in regenerative mode and a mechanical brake. In such a system, the primary braking system is the electric machine in order to maximize energy recovery. If the available regenerative power of the electric machine is not sufficient to stop the vehicle over a given distance, then the mechanical brake is used to implement the braking function. However, there is no redundancy with respect to the two braking actuators. Furthermore, such a system is supposed to be integrated into an anti-collision logic, for prevent the vehicle from colliding with possible obstacles. Therefore, these systems are designed to participate in an emergency braking situation, not as a redundant braking system for an autonomous vehicle. In addition, the performance of the electric machine is not controlled. In the event of a power loss due to a powertrain failure, the electric braking may operate at a lower level than intended, resulting in the expected stopping distance being exceeded.

[0005] Another type of existing redundant braking system is designed based on two hydraulic brake controllers and two electric parking brake systems. However, some parts of the hydraulic brake pipes are shared between the two hydraulic brake controllers, which makes this redundancy system not robust in case of hydraulic circuit failure.

[0006] Another existing braking system is designed based on two air pressure brake controllers and one air spring braking system. However, such braking systems are more suitable for large, heavy vehicles, especially those with multiple trailers that need to be connected to the braking system, such as trucks, buses or trains.

[0007] None of the existing approaches provides a redundant braking system that can improve braking capabilities while overcoming possible malfunctions of a main braking system without requiring additional hardware components. Summary of the invention

[0008] The invention aims to overcome the drawbacks of existing approaches. The objective of the invention is in particular to provide a redundant braking system for an electric vehicle that can rely on an existing braking system of the vehicle while improving the braking capacity. Furthermore, the invention aims to solve the problem of space requirement prevalent in existing approaches by reducing the addition of hardware components to enable redundancy. More specifically, the objective of the invention is to provide a braking system that adapts to the braking conditions of a braking equipment according to the determined braking capabilities of the braking equipment. In this way, the invention aims to provide a low-cost redundant braking solution that can be used with any electric vehicle.

[0009] To achieve these aims, the invention relates, according to a first aspect, to a method of managing, by a computer device on board an electric vehicle, the implementation of a braking function of said vehicle by means of a redundant braking system which comprises primary braking equipment and primary braking equipment. secondary braking equipment which operate independently of each other, said primary braking equipment being hydraulic braking equipment and said secondary braking equipment being regenerative braking equipment, the method comprising the steps of: i. receive, by a braking management module which is part of a braking redundancy management module of said device, data characterizing a braking command; ii. determining, by a braking performance monitoring module of said braking redundancy management module, data characterizing a first set of information, said first set of information stipulating, for each of said primary and secondary braking equipment, an operating state and / or a braking capacity; iii. determining, by said braking performance monitoring module, data characterizing a second set of information based on data characterizing a wheel speed of said vehicle, said second set of information stipulating a distribution of braking intensity between said primary braking equipment and said secondary braking equipment; iv. determining, by said braking management module, data characterizing a braking power to be applied by said primary braking equipment and said secondary braking equipment as a function of said data characterizing a first set of information and said data characterizing a second set of information; v. determining, by said braking management module, data characterizing a braking instruction, on the basis of said data characterizing a braking power, for said primary braking equipment and said secondary braking equipment; and vi. cause, by said device, the implementation of said braking function by said primary braking equipment and said secondary braking equipment on the basis of said data characterizing a braking instruction.

[0010] According to a variant, step ii) may comprise the steps of: • determine, using a primary braking monitoring module of said braking redundancy management module, a current operating state of said primary braking equipment; and • determine, using said primary braking monitoring module, said data characterizing an operating state and / or a braking capacity of said primary braking equipment on the basis of said current operating state of said primary braking equipment.

[0011] According to another variant, step ii) may comprise the steps of: • determine, using a charge state monitoring module of said braking redundancy management module, a value of the charge state of a battery of said vehicle; • determine, using a temperature monitoring module of said braking redundancy management module, a value of a temperature of said secondary braking equipment; • determine, using a braking power detection module of said braking redundancy management module, a value of the braking power of said secondary braking equipment; and • determine, using a secondary braking monitoring module of said braking redundancy management module, said data characterizing an operating state and / or a braking capacity of said secondary braking equipment as a function of said value of the state of charge of a battery, of said value of a temperature of said secondary braking equipment and of said value of a braking power of said secondary braking equipment.

[0012] According to yet another variant, step ii) may comprise a step consisting of reducing, using said secondary braking monitoring module, a power of said secondary braking equipment if said value of a temperature of said secondary braking equipment exceeds a predefined threshold value.

[0013] According to yet another variant, step v) may comprise the steps of: • determine, using an adaptive adjustment module of said braking redundancy management module, data characterizing a first torque setpoint based on said braking instruction for said secondary braking equipment; and • transmit, using said adaptive adjustment module, said data characterizing a first torque instruction to said secondary braking equipment.

[0014] According to yet another variant, step v) may comprise the steps of: • determine, using said adaptive adjustment module, data characterizing a second torque instruction if an estimated torque of said secondary braking equipment, based on said first torque instruction, is lower than a torque requested in the data characterizing a braking instruction; and • transmit, using said adaptive adjustment module, said data characterizing a second torque instruction to said secondary braking equipment.

[0015] According to yet another variant, said method may further comprise the steps of • monitor, using a first supervision module of said device, a first operating state of said braking redundancy management module; and • cause, using said first supervision module, the implementation of said braking function by said primary braking equipment and said secondary braking equipment when said braking redundancy management module is inoperative.

[0016] According to yet another variant, said method may further comprise a step consisting of monitoring, using a second supervision module of said braking redundancy management module, a second operating state of said first supervision module to determine whether said first supervision module is operational or not.

[0017] According to yet another variant, said method may further comprise the steps of • receive, using said first supervision module, said data characterizing a braking command and said data characterizing a wheel speed; and • cause, using said first supervision module, the implementation of said braking function by said primary braking equipment and said secondary braking equipment on the basis of said data characterizing a wheel speed after having received said data characterizing a braking instruction determined by said braking redundancy management module.

[0018] According to yet another variant, said method may further comprise the steps of • receive, from said braking redundancy management module, data characterizing a third set of information, which includes said data characterizing a first set of information, said data characterizing a second set of information, said data characterizing a braking power and said data characterizing a braking instruction; and • cause, using said first supervision module, the implementation of the braking function by said primary braking equipment and said secondary braking equipment if there is no consistency between the data characterizing a braking command, the wheel speed and said data characterizing a third set of information.

[0019] According to yet another variant, said primary braking equipment and said first supervision module can be powered by a first power supply unit of said vehicle, and said secondary braking equipment and said braking redundancy management module can be powered by a second power supply unit of said vehicle.

[0020] According to yet another variant, said method may further comprise the steps of • cause, by said braking redundancy management module, the implementation of said braking function by said secondary braking equipment if said first power supply unit is faulty; and • cause, by said first supervision module, the implementation of said braking function by said primary braking equipment if said second power supply unit is faulty.

[0021] According to yet another variant, said method may further comprise a step of increasing an input voltage level of the coils of the rotor of said secondary braking equipment if a speed of said vehicle is lower than a predefined value in order to increase an induced magnetic field.

[0022] According to a second aspect, the invention relates to a device for managing the implementation of a braking function of an electric vehicle, said device comprising an information processing unit, with one or more processors, and a data storage medium, which jointly implement a method as described above.

[0023] According to a third aspect, the invention relates to an electric vehicle provided with a braking system, which comprises primary braking equipment and secondary braking equipment and a device as described above. Brief description of the drawings

[0024] Other characteristics and advantages of the invention will appear on examining the detailed description below, and the appended drawings, in which:

[0025] [Fig-1] is a functional diagram of a braking system of an electric vehicle according to the invention;

[0026] [Fig.2] is a functional diagram of a braking system of an electric vehicle according to the invention;

[0027] [Fig.3] is a flowchart of a method according to the invention;

[0028] [Fig.4] is an illustration of at least one step of a method according to the invention;

[0029] [Fig.5] is an illustration of at least one step of a method according to the invention;

[0030] [Fig.6] is an illustration of at least one step of a method according to the invention; and

[0031] [Fig.7] is an illustration of at least one step of a method according to the invention. Detailed description of the invention

[0032] [Fig.l] illustrates a braking system 100 of an electric vehicle according to the invention. The braking system 100 comprises a primary braking equipment 104 and a secondary braking equipment 106, which operate independently of each other. More specifically, the primary braking equipment 104 is a hydraulic braking equipment and the secondary braking equipment 106 is a regenerative braking equipment, also called an electric machine.

[0033] The system 100 further comprises a device 102 for managing the implementation of a braking function of an electric vehicle within the meaning of the present invention, as described below, which implements a method for managing the implementation of a braking function of an electric vehicle within the meaning of the present invention, as described below. For this, the device 102 according to the invention is in particular capable of operating the primary braking equipment 104 and the secondary braking equipment 106 according to certain conditions, as will be described below. To do this, it includes an information processing unit, comprising at least one processor, and a data storage medium, which are configured to implement the method according to the invention.

[0034] The device 102 according to the invention comprises a braking redundancy management module 108, which allows, firstly, the implementation of the braking function and, secondly, to activate braking redundancy means. The braking redundancy management module 108 comprises a braking performance monitoring module 112 for determining an operating state and / or a braking capacity for each of the braking equipment, a primary braking monitoring module 116 and a secondary braking monitoring module 118. The primary braking monitoring module 116 and the secondary braking monitoring module 118 are connected to the braking performance monitoring module 112.The secondary brake monitoring module 118 uses a state of charge monitoring module 120, a temperature monitoring module 122, and a brake power detection module 124 to monitor the secondary brake equipment 106.

[0035] The braking redundancy management module 108 further comprises a braking management module 110 for receiving a braking command and providing a braking instruction to the primary braking equipment 104 and to the secondary braking equipment 106. The braking redundancy management module 108 further comprises an adaptive adjustment module 126 for generating a torque request, as a function of a braking instruction, to the secondary braking equipment 106.

[0036] The computing device 102 further comprises a first supervision module 128 and a second supervision module 130. Preferably, the second supervision module 130 is part of the braking redundancy management module 108. In one embodiment, the functionalities of the first supervision module 128 and of the second supervision module 130 can be controlled by a common processor.

[0037] [Fig. 2] illustrates the power supply of the braking system 100 of an electric vehicle according to the invention. It is noted that the computing device 102 and the corresponding modules are the same as those illustrated in [Fig. 1], and that they are identified by the same references in [Fig. 2]. As illustrated, a first power supply unit 202 provides power to the primary braking equipment 104 and to the first supervision module 128, while a second power supply unit 204 supplies power to the secondary braking equipment 106 and the braking redundancy management module 108.

[0038] According to the invention, all the elements described above contribute to enabling the implementation of a method for managing the implementation of a braking function of an electric vehicle, as described below in connection with [Fig.3].

[0039] [Fig. 3] illustrates a flowchart of the method according to the invention. According to a first step 302 of the method, the braking management module 110 receives data characterizing a braking command, which can be stipulated by a user or a control unit of the vehicle. Upon receipt of the braking command, according to a second step 304 of the method, the braking performance monitoring module 112 determines data characterizing a first set of information. The first set of information comprises at least one operating state or a braking capacity, or a combination of these parameters, for each of the primary 104 and secondary 106 braking equipment. For this, the braking performance monitoring module 112 is connected to the primary braking monitoring module 116 and to the secondary braking monitoring module 118.

[0040] The primary braking monitoring module 116 is connected to the primary braking equipment 104, which it monitors in order to determine its performance (i.e. braking capacity). In particular, the primary braking monitoring module 116 monitors the operation of the primary braking equipment 104 and determines data characterizing a current operating state, on the basis of which it determines data characterizing an operating state and / or a braking capacity of the primary braking equipment 104. The primary braking monitoring module 116 sends the data relating to the operating state and / or the braking capacity of the primary braking equipment 104 to the braking performance monitoring module 112. The primary braking monitoring module 116 also receives data characterizing a wheel speed from of a wheel speed sensor 114.

[0041] The secondary brake monitoring module 118 is connected to the state of charge monitoring module 120, the temperature monitoring module 122 and the brake power detection module 124 to monitor and determine the performance of the secondary brake equipment 106. The state of charge monitoring module 120 determines a value of the state of charge of a battery of the vehicle. Indeed, it is not possible to use the secondary brake equipment 106 if the battery is fully charged, and the state of charge of the battery is thus monitored in order to inform whether regenerative braking is available or not, and in order to determine the regenerative braking capabilities. The temperature monitoring module 122 determines a value of a temperature of the secondary brake equipment 106.As the secondary braking equipment 106 operates in degraded mode beyond a predefined threshold value, the temperature of the secondary braking equipment 106 is monitored to determine whether regenerative braking is available or not, or whether a degraded mode is in progress. The braking power detection module 124 determines a value of a braking power of the secondary braking equipment 106. Alternatively, the braking power detection module 124 determines a negative torque value applicable by the secondary braking equipment 106. Thus, the secondary braking monitoring module 118 determines data characterizing an operating state and / or a braking capacity of the secondary braking equipment 106 as a function of the value of a state of charge of a battery, the value of a temperature and the value of a braking power of the secondary braking equipment 106.

[0042] Based on the data received from the primary brake monitoring module 116 and the secondary brake monitoring module 118, the brake performance monitoring module 112 determines the first set of information.

[0043] According to a third step 306 of the method, the braking performance monitoring module 112 determines data characterizing a second set of information as a function of the wheel speed of the vehicle. The second set of information stipulates a distribution of the braking intensity between the primary braking equipment 104 and the secondary braking equipment 106 as a function of the wheel speed. The braking performance monitoring module 112 determines a total braking intensity applied as a function of the variation in the wheel speed and subtracts from the total braking intensity the value of a braking power of the secondary braking equipment 106, thereby determining the distribution of the braking intensity. In other words, the distribution of the braking intensity may vary between the primary braking equipment 104 and the secondary braking equipment 106.For example, in some cases, the braking equipment. primary 104 may have a greater braking intensity distribution than the secondary braking equipment 106. In other cases, the primary braking equipment 104 may have a lesser braking intensity distribution than the secondary braking equipment 106. In still other cases, the braking intensity may be distributed equally between the primary braking equipment 104 and the secondary braking equipment 106.

[0044] According to a fourth step 308, the braking management module 110 determines data characterizing a braking power to be applied by the primary braking equipment 104 and the secondary braking equipment 106 as a function of the first set of information and the second set of information. The braking management module 110 determines the braking power as a function of the braking capacities and the distribution of the braking intensity for the primary braking equipment 104 and the secondary braking equipment 106. It is noted that the braking power is applied both by the primary braking equipment 104 and by the secondary braking equipment 106 separately. In other words, the primary braking equipment 104 and the secondary braking equipment 106 operate independently of each other, thus ensuring the redundancy of the braking function of the vehicle.For example, if the primary braking equipment 104 fails, the secondary braking equipment 106 independently provides the braking function and vice versa.

[0045] According to a fifth step 310 of the method, the braking management module 110 determines data characterizing a braking instruction to be transmitted, as a function of the previously determined braking power data, to the primary braking equipment 104 and to the secondary braking equipment 106. The braking instruction is determined as a function of the braking power for each of the primary 104 and secondary 106 braking equipment. The braking instruction comprises a quantity of torque to be applied by the primary braking equipment 104 and the secondary braking equipment 106.

[0046] The braking instruction corresponding to the primary braking equipment 104 is directly provided to it by the braking management module 110. On the other hand, for the implementation of the braking function using the secondary braking equipment 106, the braking instruction received from the braking management module 110 is provided to the adaptive adjustment module 126, which filters the instruction before sharing it with the secondary braking equipment 106. The adaptive adjustment module 126 is configured to determine data characterizing a first torque setpoint as a function of a braking instruction. In particular, the adaptive adjustment module 126 converts the braking instructions received from the braking management module 110 so that they are compatible with the secondary braking equipment 106. In other words, the adaptive adjustment module 126 converts the braking instructions into a format understood by the secondary braking equipment 106.

[0047] Furthermore, the adaptive adjustment module 126 determines data characterizing a second torque setpoint if an estimated torque of the secondary braking equipment 106 is lower than the torque required by a braking instruction. In other words, the adaptive adjustment module 126 adapts and determines a torque setpoint so that the secondary braking equipment 106 executes the braking function in accordance with the braking instruction.

[0048] [Fig. 4] illustrates the operation of the adaptive adjustment module 126. In this figure, the vehicle speed is represented on the abscissa and the torque on the ordinate. In particular, an original setting for a torque setpoint as a function of the vehicle speed is seen when the accelerator pedal is released and no torque request is received. Line 402 represents the torque setpoints in vehicles equipped with a standard braking system, while line 404 represents the torque setpoints in an electric vehicle equipped with the braking system according to the invention.

[0049] It is noted that in vehicles equipped with the standard braking system, the regenerative torque gradually decreases with the speed of the vehicle, and no regenerative braking is required below a predefined speed, for example a speed of 9 km / h. These two conditions cause a vehicle to stop the braking force at 9 km / h.

[0050] In contrast, the braking system 100 of the present invention is configured to adapt a regenerative braking torque setpoint to follow the braking commands, thereby allowing the vehicle to be completely stopped down to 0km / h. The setting is adapted to correspond to the braking instruction from the braking management module 110. In other words, a low-speed deceleration torque can be generated to allow the regenerative braking to stop the vehicle after receiving the braking instruction. The braking command is then conditioned by a maximum stopping distance dependent on an environment of the vehicle. Therefore, a first torque setpoint is determined in a closed-loop system powered by the electric machine based on an estimated torque feedback. If the estimated torque is lower than the requested torque, the first torque setpoint is increased.For this, a conventional PID controller is incorporated to control the set point performance, thus avoiding overshoot, oscillation and stationary error. It is noted that any other control logic can be applied to achieve the desired performance.

[0051] The adaptive adjustment module 126 sends the first torque setpoint to the secondary braking equipment 106 to control the regenerative braking operation. And, as already mentioned, the performance of the braking equipment is secondary 106 are measured by the state of charge monitoring module 120, the temperature monitoring module 122 and the brake power detection module 124.

[0052] Then, according to a sixth step 312 of the method, the device 102 according to the invention causes the implementation of the braking function by the primary braking equipment 104 and the secondary braking equipment 106 on the basis of the braking instruction determined by the braking management module 110. Consequently, the primary braking equipment 104 and the secondary braking equipment 106 execute a corresponding braking function.

[0053] In addition, the redundancy of the braking function is ensured by means of the first supervision module 128 and the second supervision module 130, which monitor each other. More specifically, the first supervision module 128 receives from the second supervision module 130 data characterizing an operating state of the braking redundancy management module 108. Similarly, the second supervision module 130 receives data characterizing an operating state of the first supervision module 128. Thus, the first supervision module 128 and the second supervision module 130 reciprocally monitor their operating states. If the braking redundancy management module 108 is not operational, the braking function is controlled by the first supervision module 128.In particular, the first supervision module 128 generates braking instructions and transmits the instruction to the primary braking equipment 104 and to the secondary braking equipment 106.

[0054] The first supervision module 128 receives the braking commands and the wheel speed of the vehicle. The first supervision module 128 also receives the third set of information comprising the first set of information, the second set of information, the braking power and the braking instruction. The first supervision module 128 allows the primary braking equipment 104 and the secondary braking equipment 106 to implement the braking function if the speed of the vehicle is not reduced even after the transmission of the braking instruction. Similarly, if there is no consistency between the third set of information, the braking instructions and the wheel speed of the vehicle, the first supervision module 128 allows the primary braking equipment 104 and the secondary braking equipment 106 to implement the braking function.

[0055] Figures 5 to 7 illustrate the characteristics of different modules associated with the secondary braking equipment 106. [Fig.5] illustrates in particular the operation of the temperature monitoring module 122 according to the invention. Line 502 illustrates the speed of the vehicle and line 504 the temperature of the secondary braking equipment 106. Detection and activation of overheating of the temperature temperature are indicated by line 506. It will be noted that the temperature monitoring module 122 is able to detect any overheating of the secondary braking equipment 106, by informing the secondary braking monitoring module 118 of the increase in temperature, thus determining the braking capabilities of the secondary braking equipment 106 as a function of the temperature.

[0056] [Fig. 6] illustrates an example of adaptation by the secondary braking monitoring module 118 due to an overheating situation. It can be seen that an available power in the electric machine / secondary braking equipment 106 is decreased as its temperature increases, in order to avoid damaging the secondary braking equipment 106. The normalized temperature of the electric machine is shown on the abscissa. The regenerative power is shown on the ordinate axis. The normalized temperature of the electric machine is calculated based on a measured temperature divided by a maximum temperature of the device. When the available power decreases, the load of the machine decreases and, therefore, the temperature of the electric machine is controlled. Even if [Fig.6] shows a stepwise variation of the regenerative braking torque, a polynomial function (linear or higher order) can be applied to determine the braking capabilities of the secondary braking equipment 106. Therefore, the secondary braking monitoring module 118 decreases the power of the secondary braking equipment 106 if the temperature value of the secondary braking equipment 106 exceeds a predefined threshold value. The predefined threshold value is a temperature value after which the performance of the secondary braking monitoring module 118 is reduced.

[0057] [Fig.7] illustrates a regenerative braking curve. [Fig.7] shows, among other things, the regenerative braking torque deployed in a conventional electric vehicle equipped with a synchronous electric machine, as a function of its rotational speed. It should be noted that a high rotational speed area has a lower torque performance, because the stator coils cannot be supplied at a higher voltage level. Furthermore, a low rotational speed area has an early torque drop to 0 Nm. Conventionally, when the stator coils are not excited with the required current, energy cannot be stored in the battery, and the regenerative torque drops. One solution is to increase the power of the induced magnetic field of the rotor by rotating at a higher speed.However, according to the invention, in order to stop the vehicle at a reduced speed, it is the current of the rotor coil that is increased to generate a larger magnetic field, even at low speed. In other words, the input voltage of the rotor coil of the secondary braking equipment is increased as soon as the vehicle speed is lower than a predefined value. In [Fig.7], line 702 indicates a curve of the . regenerative braking torque of an existing electric vehicle, line 704 indicates a curve of the regenerative braking torque of the electric vehicle according to the invention, and a zone 706 illustrates a gain zone in which zero speed is reached.

[0058] Furthermore, from the point of view of the redundancy of the power supply, if the first power supply unit 202 or its connection fails, the brake redundancy management module 108 is capable of stopping the vehicle by using the secondary braking equipment 106. Similarly, if the second power supply unit 204 or its connection fails, the first supervision module 128 detects that the brake redundancy management module 108 is inoperative, and the first supervision module 128 controls the implementation of the braking function by the primary braking equipment 104.

[0059] Thus, thanks to the method, device and system according to the invention described above, a solution is provided for improving the braking capabilities of autonomous electric vehicles by providing redundant braking which does not require any additional hardware components.

Claims

1. Claims Method for managing, by a computer device (102) on board an electric vehicle, the implementation of a braking function of said vehicle by means of a redundant braking system (100) which comprises primary braking equipment (104) and secondary braking equipment (106) which operate independently of one another, said primary braking equipment (104) being hydraulic braking equipment and said secondary braking equipment (106) being regenerative braking equipment, characterized in that said method comprises steps of: i. receiving, by a braking management module (110) which is part of a braking redundancy management module (108) of said device (102), data characterizing a braking command; ii. determining, by a braking performance monitoring module (112) of said braking redundancy management module (108), data characterizing a first set of information, said first set of information stipulating, for each of said primary (104) and secondary (106) braking equipment, an operating state and / or a braking capacity; iii. determining, by said braking performance monitoring module (112), data characterizing a second set of information based on data characterizing a wheel speed of said vehicle, said second set of information stipulating a distribution of braking intensity between said primary braking equipment (104) and said secondary braking equipment (106); iv. determining, by said braking management module (110), data characterizing a braking power to be applied by said primary braking equipment (104) and said secondary braking equipment (106) as a function of said data characterizing a first set of information and said data characterizing a second set of information; v. determining, by said braking management module (110), data characterizing a braking instruction, on the basis said data characterizing a braking power, for said primary braking equipment (104) and said secondary braking equipment (106); and vi. causing, by said device (102), the implementation of said braking function by said primary braking equipment (104) and said secondary braking equipment (106) on the basis of said data characterizing a braking instruction.

2. Method according to claim 1, characterized in that step ii) comprises the steps of: • determining, using a primary braking monitoring module (116) of said braking redundancy management module (108), a current operating state of said primary braking equipment (104); and • determining, using said primary braking monitoring module (116), said data characterizing an operating state and / or a braking capacity of said primary braking equipment (104) on the basis of said current operating state of said primary braking equipment (104).

3. Method according to one of the preceding claims, characterized in that step ii) comprises the steps of: • determining, using a state of charge monitoring module (120) of said braking redundancy management module (108), a value of the state of charge of a battery of said vehicle; • determining, using a temperature monitoring module (122) of said braking redundancy management module (108), a value of a temperature of said secondary braking equipment (106); • determine, using a braking power detection module (124) of said braking redundancy management module (108), a value of the braking power of said secondary braking equipment (106); and • determining, using a secondary braking monitoring module (118) of said braking redundancy management module (108), said data characterizing an operating state and / or a braking capacity of said secondary braking equipment (106) as a function of said value of the state of charge of a battery, of said value of a temperature of said secondary braking equipment (106) and of said value of a braking power of said secondary braking equipment (106).

4. Method according to claim 3, characterized in that step ii) comprises a step of decreasing, using said secondary braking monitoring module (118), a power of said secondary braking equipment (106) if said value of a temperature of said secondary braking equipment (106) exceeds a predefined threshold value.

5. Method according to one of the preceding claims, characterized in that step v) comprises the steps of: • determining, using an adaptive adjustment module (126) of said braking redundancy management module (108), data characterizing a first torque setpoint based on said braking instruction for said secondary braking equipment (106); and • transmitting, using said adaptive adjustment module (126), said data characterizing a first torque setpoint to said secondary braking equipment (106).

6. Method according to claim 5, characterized in that step v) comprises the steps of: • determining, using said adaptive adjustment module (126), data characterizing a second torque setpoint if an estimated torque of said secondary braking equipment (106), based on said first torque setpoint, is lower than a torque requested in the data characterizing a braking instruction; and • transmitting, using said adaptive adjustment module (126), said data characterizing a second torque instruction to said secondary braking equipment (106).

7. Method according to one of the preceding claims, characterized in that said method further comprises the steps of: • monitoring, using a first supervision module (128) of said device (102), a first operating state of said braking redundancy management module (108); and • causing, using said first supervision module (128), the implementation of said braking function by said primary braking equipment (104) and said secondary braking equipment (106) when said braking redundancy management module (108) is inoperative.

8. Method according to claim 7, characterized in that said method further comprises a step of monitoring, using a second supervision module (130) of said braking redundancy management module (108), a second operating state of said first supervision module (128) to determine whether said first supervision module (128) is operational or not.

9. Method according to one of claims 7-8, characterized in that said method further comprises the steps of: • receiving, using said first supervision module (128), said data characterizing a braking command and said data characterizing a wheel speed; and • causing, using said first supervision module (128), the implementation of said braking function by said primary braking equipment (104) and said secondary braking equipment (106) on the basis of said data characterizing a wheel speed after having received said data characterizing a braking instruction determined by said braking redundancy management module (108).

10. Method according to claims 7-9, characterized in that said method further comprises the steps of: • receiving, from said redundancy management module braking (108), data characterizing a third set of information, which includes said data characterizing a first set of information, said data characterizing a second set of information, said data characterizing a braking power and said data characterizing a braking instruction; and causing, using said first supervision module (128), the implementation of the braking function by said primary braking equipment (104) and said secondary braking equipment (106) if there is no consistency between the data characterizing a braking command, the wheel speed and said data characterizing a third set of information.

11. Method according to claims 7-10, characterized in that said primary braking equipment (104) and said first supervision module (128) are powered by a first power supply unit (202) of said vehicle, and said secondary braking equipment (106) and said braking redundancy management module (108) are powered by a second power supply unit (204) of said vehicle.

12. Method according to claims 7-11, characterized in that said method further comprises the steps of: • causing, by said braking redundancy management module (108), the implementation of said braking function by said secondary braking equipment (106) if said first electrical power supply unit (202) is faulty; and • causing, by said first supervision module (128), the implementation of said braking function by said primary braking equipment (104) if said second electrical power supply unit (204) is faulty.

13. Method according to one of the preceding claims, characterized in that said method further comprises a step of increasing an input voltage level of the rotor coils of said secondary braking equipment (106) if a speed of said vehicle is lower than a predefined value in order to increase an induced magnetic field.

14. Computer device (102) for managing the implementation of a braking function of an electric vehicle, characterized in that said device (102) comprises an information processing unit, with one or more processors, and a data storage medium, which jointly implement a method according to one of the preceding claims.

15. Electric vehicle comprising a braking system (100), characterized in that said braking system (100) comprises primary braking equipment (104), secondary braking equipment (106) and a device (102) according to claim 14.

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