Electric power supply system installed in vehicle

Abstract

Disclosed is a power supply network installed in a vehicle, the power supply network comprising one or more electrical energy sources, including at least two distribution boxes (511), each of the at least two distribution boxes comprising: at least one internal distribution bus (601, 602), the at least one internal distribution bus being connectable to the one or more electrical energy sources; at least two output switches (61, 62, 63, 64, 65, 66, 67, 68), each output switch supplying power from the internal distribution bus to different electrical consumers of the vehicle; and a processor (603), the processor being used to control the output switches so as to distribute consumption loads among the electrical consumers associated with different operating modes of the vehicle.

Description

Technical Field

[0001] The invention relates to an on-board electrical power supply network in a vehicle, more particularly in a motor vehicle. Background Art

[0002] Typically, such a power supply network includes one or more fuse boxes, which are directly connected to the battery and the alternator at the input end or indirectly connected via cables, and are connected to different electrical consumers or groups of electrical consumers via other cables at the output end. In addition, many on-board computers are further connected to the different electrical consumers via bus-type or wired connections to control and monitor the operation of these electrical consumers.

[0003] The disadvantage of known power supply network architectures is that many different wires and cables are required. These architectures also have the disadvantage of not being very modular. For example, adding, removing or modifying electrical appliances may require a complete review of the wiring diagram unless all future modifications have been correctly foreseen. Protective fuses also have the disadvantage that they must be replaced after the circuit is disconnected due to fuse damage. Replacing fuses with reset circuit breakers (which is the case in residential buildings) will have other disadvantages, such as, for example, in terms of volume or in terms of energy distribution management, when many operating modes of today's motor vehicles do not necessarily require the same energy distribution. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the subject of the present invention is an on-board power supply network in a vehicle, which includes one or more electrical energy sources and is characterized in that the on-board power supply network includes at least two distribution boxes, each of which includes: at least one internal distribution bus, which can be connected to the one or more electrical energy sources; at least two output switches, each for supplying power from the internal distribution bus to electrical appliances different from the vehicle; and a driver processor, which is used to drive the output switch to distribute the consumption load among the electrical appliances associated with different operating modes of the vehicle.

[0005] The distribution network according to the invention thus makes it possible to distribute the management of the electrical consumption of the vehicles according to the groups of electrical consumers in the vicinity of each distribution box, making it possible to reduce, simplify and better manage the wiring.

[0006] Advantageously, at least one of the output switches comprises at least two parallel switch paths, which are connected upstream to the internal power distribution bus via a first common electrical conductor and downstream to one of the electrical consumers via a second common electrical conductor.

[0007] In particular, at least one of the output switches comprises at least one switching path formed by a smart MOS transistor.

[0008] Also advantageously, the electricity supply network comprises a coupling box connected to each source of electrical energy and a set of electric wires for connecting each distribution box to each coupling box.

[0009] In particular, but not necessarily, when the electricity supply network comprises at least two sources of electrical energy, each coupling box comprises:

[0010] a selector comprising a plurality of switching paths, all of which are connected upstream to the same energy source pole and each of which is connected downstream to an electric line leaving the coupling box;

[0011] - a control processor for controlling the selector so as to control and monitor the connection state of each path connected to the electric wires assigned to the same energy source.

[0012] More specifically, a plurality of electric wires leaving the coupling box are distributed in a common manner to at least two distribution boxes, and each of these distribution boxes comprises:

[0013] - an input switch having a plurality of parallel switch paths, each of which is individually connected upstream to one of the allocated electric wires and is connected downstream in groups, sub-groups or individually to an internal power distribution bus or the internal power distribution bus(es), the drive processor controlling and monitoring the connection state of each path.

[0014] Alternatively, each wire leaving the coupling box is connected to only one internal distribution bus.

[0015] Power Supply Network It is worth noting that the operating modes of the vehicle include all or some of the following: parking mode, maintenance mode, logistics mode, driving mode, micro-hybrid mode, autonomous driving mode and failure mode.

[0016] The power supply network is also noteworthy that at least one of the distribution boxes includes a memory containing diagnostic instructions, and these diagnostic instructions are accessible by the drive processor to perform diagnostic operations.

[0017] Preferably, the power supply network comprises an on-board communication bus and a central on-board computer connected to the on-board communication bus, such that each drive processor and / or each control processor accesses the on-board communication bus in order to exchange information with the central on-board computer.

[0018] More particularly, each driver processor and / or each control processor executes a safety management routine when the vehicle is involved in a crash event or loses communication with the driver processor.

[0019] Still more particularly, the two distribution boxes each comprise at least one voltage sensor for detecting an undervoltage and / or an overvoltage on the internal distribution bus.

[0020] Another subject of the invention is a motor vehicle comprising an electricity supply network reproducing the essential features described in the remainder of the description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other advantages and characteristics of the invention will become apparent from reading the detailed description of embodiments and examples given by way of illustrative and non-limiting examples, with reference to the attached drawings, in which:

[0022] [ Figure 1 ] shows a motor vehicle comprising a first embodiment of an electric power supply network according to the invention;

[0023] [ Figure 2 ] shows a motor vehicle according to a second embodiment of the invention comprising an electric power supply network;

[0024] [ Figure 3 ] shows a first variant of an electricity supply network according to the invention;

[0025] [ Figure 4 ] shows a first distribution box which can be used in a first variant of an electricity supply network;

[0026] [ Figure 5 ] shows a second variant of the electricity supply network according to the invention;

[0027] [ Figure 6 ] shows a second distribution box which can be used in a second variant of the electricity supply network;

[0028] [ Figure 7 ] shows a third distribution box which can be used for a second variant of the power supply network. DETAILED DESCRIPTION

[0029] refer to[ Figure 1 ], a vehicle, more specifically a motor vehicle 100, comprises an on-board power supply network 110. The power supply network 110 comprises an electrical energy source 101, which is essentially composed of a 12V battery. The 12V battery is, for example, a lead-acid battery or a lithium-ion battery. The on-board power supply network 110 comprises two distribution boxes 111, 112.

[0030] The distribution box 111 located in the engine compartment (CMO) is connected to the battery 101, which is connected to the starter 103, which is itself connected to the alternator 102, which can constitute another electrical energy source. When the engine is located in the front of the vehicle, the distribution box 111 is located, for example, at the left front (AVG). The distribution box 111 distributes the voltage from the electrical energy source or sources connected to it to the electrical consumers mainly located in the engine compartment.

[0031] An electrical distribution box 112 located in the passenger compartment, typically in the dashboard (Pdb), is connected to the electrical distribution box 111 in order to in turn distribute electrical energy to electrical consumers located primarily in the rest of the vehicle.

[0032] refer to[ Figure 2 ], a motor vehicle 200 comprises an on-board power supply network 201. The power supply network 201 comprises three electrical energy sources 201, 202, 204, which are basically composed of a 12V main battery, a 12V secondary battery, and an alternator or a BSG type starter-alternator. These electrical energy sources are connected to the 12V network via two source coupler boxes, which allow the energy source to be connected to or disconnected from the 12V on-board network. The on-board power supply network 210 has six distribution boxes 211, 212, 213, 221, 222, 223.

[0033] The main battery 201 and the starter 203 are connected to the first source coupler 205. The sub-battery 204 and the alternator or BSG 202 are connected to the second source coupler 206. When the engine is located at the front of the vehicle, the distribution box 211 is located at the left front (AVG), for example.

[0034] The distribution box 211 is also connected to the distribution box 221 in order to distribute the voltage from the electrical energy source to which it is connected to the electrical consumers mainly located in the engine compartment.

[0035] Distribution boxes 212, 222 located at the front of the passenger compartment, typically in the instrument panel (Pdb), are connected to distribution boxes 211 and 221, respectively, to further distribute electrical energy to electrical consumers located primarily at the front of the vehicle.

[0036] Distribution boxes 213, 223 located at the rear of the vehicle and located at the rear left (ARG) and rear right (ARD), respectively, are connected to distribution boxes 212 and 222, respectively, to further distribute electrical energy to electrical consumers mainly located at the rear of the vehicle.

[0037] refer to[ Figure 3 ], the power supply network 110, 210 can be produced more precisely in the form of a power supply network 310, which, by way of illustrative example only, comprises three distribution boxes 311, 312, 313. The explanation given below is for the case where Figure 1 The two and Figure 2 Any number between six, or more, distribution boxes will still work.

[0038] The distribution boxes 311, 312, 313 are connected to an electrical energy source, which consists of a battery 301, which is connected in parallel with a 12V energy generator (AC generator, starter-AC generator, DC-DC converter, etc.) 303 through a set of wires 81, 82, 83, 84, 85, 86. One or more wires make it possible to connect each of these distribution boxes to the electrical energy source.

[0039] The distribution boxes 312, 313 are similar to those now referred to as [ Figure 4 ]The distribution box 311 described in FIG.

[0040] The distribution box 311 comprises an internal distribution bus 401 which only needs to be connected to the electrical wires 81 in order to connect it to the source of electrical energy formed by the battery 301 connected in parallel with the 12V energy generator 303 .

[0041] The plurality of output switches 44, 45, 46, 48 each include a switch path, which is connected to the internal power distribution bus 401 upstream via an electrical conductor 430, 440, and is connected to a different connector or terminal downstream via a second electrical conductor 431, 432, 433, 442, which leads to one of the electrical consumers. Figure 3 As can be seen in FIG. 4 , the switch 45 makes it possible to supply power to the electrical consumers 35 from the internal power distribution bus 401 .

[0042] The output switch 47 includes two parallel switch paths, which are connected to the internal power distribution bus 401 upstream through a common power conductor 440 and are connected to the electrical consumer 37 downstream through a second common power conductor 441. Therefore, the output switch 47 allows a larger current to be supplied from the internal power distribution bus 401 to the electrical consumer 37 than the current that the switch 45 allows to be supplied to the electrical consumer 35.

[0043] In this example, the distribution box 311 also comprises an internal distribution bus 402 which only needs to be connected to the electric wires 82 in order to connect it to the source of electrical energy formed by the battery 301 and the energy generator 303 .

[0044] The output switches 41, 42, and 43 each include three or four parallel switch paths, which are connected to the internal power distribution bus 402 upstream through first common electrical conductors 410, 420, and are connected to different electrical consumers downstream through second common electrical conductors 411, 421. The output switch 41 has one more switch path than the switch 42, so the switch 41 allows a larger current to be supplied from the internal power distribution bus 402 to the electrical consumer 31 than the current that the switch 42 allows to be supplied to the electrical consumer 32.

[0045] Placing multiple parallel switch paths for the same switch is particularly useful for creating switches with MOS (metal oxide semiconductor) transistors (e.g., metal oxide gate field effect transistors). The advantage of MOS transistors is that they have very short response times, which is valuable in the field of automotive safety. However, the low supply voltage of the order of 12V in motor vehicles results in high current values ​​to meet the inrush power requirements of electrical appliances. Distributing the current in multiple parallel switch paths makes it possible to meet the current requirements while making the current through each transistor smaller.

[0046] The driver processor 403 controls the opening and closing of a single switch path of each output switch 44, 45, 48, or controls the simultaneous opening and closing of all switch paths of each of the output switches 41, 42, 43, 47, so as to distribute the consumption load among the electrical appliances associated with different operating modes of the vehicle.

[0047] Producing the switching paths by means of smart MOS transistors allows for local management of temperature, current values, voltage values ​​and communication with the driver processor (both in terms of control / monitoring and device operation).

[0048] The chip associated with the power MOS transistor may include a temperature probe for the junction of the MOS transistor, and a microprocessor, which is capable of reading the temperature value measured by the probe, and is capable of turning off the MOS transistor to disconnect the switch path in the event of overheating of the internal junction of the transistor (for example, as long as the measured temperature reaches or exceeds 150°C), thereby protecting the power MOS transistor. The chip associated with the power MOS transistor may also include a current probe for the current passing through the junction of the MOS transistor, which is accessible to the microprocessor. In the event that the current passing through the internal junction of the transistor is too large, the microprocessor drives the MOS transistor to turn it off to disconnect the switch path, thereby protecting the power MOS transistor. The microprocessor may also be programmed to limit the current to a parameterizable maximum value for a short period of time to allow certain transient behaviors. The chip associated with the power MOS transistor may also include a voltage probe at the output of the junction of the MOS transistor. In the event that a parameterizable voltage threshold is exceeded, the microprocessor may disconnect the switch path by controlling the MOS transistor to be in a cut-off state, so as to protect the power MOS transistor. The chip is equipped with a digital and / or analog interface to receive control instructions from the drive processor and transmit data related to real-time temperature, amperage, voltage, and data related to over-limit alarms to the drive processor.

[0049] refer to[ Figure 5], the power supply network 110, 210 or other vehicle power supply networks can also be generated in the form of a power supply network 510. Here again, only by means of an illustrative example, the power supply network includes three distribution boxes 511, 512, and 513.

[0050] The power supply network 510 differs from the power supply network 310 substantially in that the power supply network 510 comprises two electrical energy sources. The first electrical energy source consists of a main battery 503 connected in parallel with the starter 504 upstream of the first coupling box 506. The second electrical energy source consists of an additional emergency battery 503 connected in parallel with the starter 504 upstream of the second coupling box 506.

[0051] Each coupling box 505, 506 includes a selector 507, 508, respectively, which includes a plurality of switch paths (in Figure 5 In the illustrative example of the embodiment of the present invention, eight are connected downstream to each switch path connected to the wires leaving the coupling box. Each of the wires leaving the coupling box 505 is connected (for example, here by splicing) to wires 91, 92, 93, 94, 95, 96, 97, which are themselves connected to the wires of the coupling box 506. The switch paths of the selector 507 are all connected upstream to the same + pole of the battery 501. The switch paths of the selector 508 are all connected upstream to the same + pole of the battery 503.

[0052] The control processor 509 for controlling the selector 507 makes it possible to control and monitor the on or off state of each path connected to the electric wires assigned or not assigned to the + pole of the energy source formed by the battery 501 and / or the energy generator 502, respectively.

[0053] The control processor 520 for controlling the selector 508 makes it possible to control and monitor the on or off state of each path connected to the electric wires assigned or not assigned to the + pole of the energy source formed by the battery 503 , respectively.

[0054] The two processors 509, 520 communicate with each other through the vehicle communication bus 90 to control the switch path of each selector 507, 508 so that each wire 91, 92, 93, 94, 95, 96, 97 is preferably connected to the potential of more than one electrical energy source. For example, in the emergency operation mode of the vehicle, the processor 509 controls all the paths of the selector 507 so that these paths are in the disconnected state, while the processor 520 controls all the paths of the selector 508 so that these paths are in the connected state, so that the power supply network 510 is only supplied with power by the second energy source. For example, in the energy distribution operation mode of the vehicle, the processor 509 controls the paths of the selector 507 connected to the wires 91, 92, 93 to be in the on state, and controls the paths of the selector 507 connected to the wires 94, 95, 96, 97, 98 to be in the off state, while the processor 520 controls the paths of the selector 508 connected to the wires 91, 92, 93 to be in the off state, and controls the paths of the selector 508 connected to the wires 94, 95, 96, 97, 98 to be in the on state, so that the power supply network 510 is powered by the first energy source in a shared manner. It is also conceivable to control all or some of the same switch paths of the two selectors 507, 508 to be in the on state, for example, in order to recharge the additional battery 503 from the energy generator 502.

[0055] The processors 509 , 520 are each supplied with power upstream from the selectors 507 , 508 , respectively, in a manner protected by fuses 521 , 522 , and / or are each supplied with power downstream from the selectors 507 , 508 , respectively, in a manner protected by one of the switch paths.

[0056] In an alternative embodiment, the distribution boxes 512, 513 are similar to those now referred to as [ Figure 6 ]Distribution box 511 described in detail.

[0057] The distribution box 511 includes one or two internal distribution buses 601 , 602 corresponding to the one or more internal distribution buses 401 , 402 .

[0058] Multiple output switches 64, 65, 66, 67, and 68 each include one or two switch paths, which are connected upstream to the internal power distribution bus 601 in a manner equivalent to the output switches 44, 45, 46, 47, and 48, so as to supply power from the internal power distribution bus 601 to the electrical appliances 54, 55, 56, 57, and 58.

[0059] In this example, the distribution box 511 also includes an internal distribution bus 602. The output switches 61, 62, and 63 each include three or four parallel switch paths, which are connected to the internal distribution bus 602 upstream through first common electrical conductors 610, 620, and are connected to different electrical consumers downstream through second common electrical conductors 611, 621. The output switch 61 has one more switch path than the switch 62, so the switch 61 allows a larger current to be supplied from the internal distribution bus 602 to the electrical consumer 51 than the current that the switch 62 allows to be supplied to the electrical consumer 53.

[0060] As for the switch of the distribution box 311, multiple parallel switch paths are placed for the same switch to pass through MOS (metal oxide semiconductor) transistors (e.g., metal oxide gate field effect transistors or Smart-MOS TM Transistors are particularly useful for creating switches.

[0061] The driver processor 603 controls the opening and closing of a single switching path of each output switch 64, 65, 68, or controls the simultaneous opening and closing of all switching paths of each of the output switches 61, 62, 63, 67, so as to distribute the consumption load among the electrical appliances associated with different operating modes of the vehicle.

[0062] However, the distribution box 311 is more suitable for a power supply network in which each wire leaving the coupling box 305, 505, 506 is connected to only one internal distribution bus, while Figure 6 The distribution box 511 shown in FIG. 5 is more suitable for an electric power supply network in which a plurality of electric wires leaving the coupling boxes 305 , 505 , 506 are distributed in a common manner to at least two similar distribution boxes 511 , 512 , 513 .

[0063] and Figure 6 The distribution boxes 512 and 513, which are the same as the distribution box 511 shown in FIG. 3 , differ from the distribution box 311 in that each of the former boxes includes an input switch 60 having a plurality of parallel switch paths, each of which is individually connected upstream to one of the allocated wires 91, 92, 93, 94, 95, 96, 97, 98, and is connected downstream in groups, subgroups or individually to one or more internal distribution buses 601, 602. The drive processor 603 controls and monitors the on and off states of each path to determine which one or more wires of the first group of wires 91, 92, 93 are connected or not connected to the internal distribution bus 601, and which one or more wires of the second group of wires 94, 95, 96 are connected or not connected to the internal distribution bus 602.

[0064] and Figure 6The same distribution boxes 311, 312, 313 as the distribution box 511 shown in FIG. 3 can be used in the network 310 so that each distribution box 311, 312, 313 shares each conductor 81 to 86. In other words, the same distribution box as the distribution box 511 can also be used in the presence of a single electrical energy source.

[0065] In another alternative embodiment, the distribution boxes 211, 212, 213, 221, 222, 223 are similar to those now referred to as [ Figure 7 ]Distribution box 221 described in detail.

[0066] Figure 7 The distribution box shown in the figure includes a single internal distribution bus 701, which is connected to a plurality of switches 71, 72, 73, 74, 75, 76, 77, 78, which have an open state and a closed state, and whose states are controlled and monitored by a processor 703. Some switches 74, 75, 76, 78 have only one switch path. Some switches 71, 72, 73, 77 have at least two switch paths. For example, the output switch 71 includes four parallel switch paths, which are connected to the internal distribution bus 701 upstream through a first common electrical conductor 710, and are connected to one of the electrical appliances downstream through a second common electrical conductor 711. For another example, the output switch 72 includes three parallel switch paths, which are connected to the internal distribution bus 701 upstream through a first common electrical conductor, and are connected to another electrical appliance downstream through a second common electrical conductor 721.

[0067] equivalent to Figure 6 In the manner shown in the distribution box 511, Figure 7 The distribution box 221 shown in the figure includes an input switch 70 having a plurality of parallel switch paths, each of which is individually connected upstream to, for example, one of the distributed wires 91, 92, 93, 94, 95, 96, 97, 98, and is connected downstream in groups to an internal distribution bus 701. A drive processor 703 controls and monitors the on and off states of each path to determine which one or more wires in a group of wires 91, 92, 93, 94, 95, 96 are connected or not connected to the internal distribution bus 701.

[0068] Different from Figure 6 The distribution box 511 shown in FIG. Figure 7The distribution box 221 shown in the figure comprises two input connectors, each connected upstream of each switching path of the input switch 70. The first connector allows the distribution box 221 to be connected to a potential delivered by an electrical energy source or by another distribution box. The second connector allows the distribution box 221 to deliver to another distribution box the potential to which it is connected via the first connector. The double connector makes it possible to avoid joining the cables connecting the distribution boxes.

[0069] The distribution boxes 311 , 511 , 221 include memories 404 , 604 , 704 , respectively, which can be accessed by the processors 403 , 603 , 703 to write data therein and read data therein or execute computer instructions stored therein.

[0070] The data to be written to the memory may come from the on-board communication bus 80, 90 to which the processor of the connection box is connected. The data to be written to the memory may also come from the execution of stored computer instructions, or from measurement signals related to the power supply network. For example, each of the two distribution boxes includes a voltage sensor for detecting undervoltage and / or overvoltage on the internal distribution bus. The memory may also contain diagnostic instructions that can be accessed by the drive processor to perform diagnostic operations.

[0071] A central on-board computer (not shown) can advantageously be connected to the on-board communication buses 80, 90 in order to manage different operating modes of the vehicle, including all or some of the following: parking mode, maintenance mode, logistics mode, driving mode, micro-hybrid mode, autonomous driving mode and fault mode.

[0072] Each drive processor 303, 503 and / or each control processor 509, 520 in the distribution box 311, 511 accesses the on-board communication bus 80, 90 in order to exchange information with the central on-board computer, in particular in order to receive instructions for distributing electrical energy between the different electrical consumers connected to each distribution box.

[0073] Each driver processor 403, 603, 703 and / or each control processor 509, 520 may also receive a vehicle collision detection alert via the on-board communication bus or directly via a dedicated wire in order to execute a safety management program when the vehicle is involved in a collision event. The safety management program (which is stored, for example, in the memory 404, 604, 704) may include disconnecting all or some of the switches 41 to 48, or disconnecting all or some of the switch paths of the input switches 60, 70. The micro-relay 49, 69 has a fault contact that disconnects the end of the bus 401, 601 from the wires 81, 91, 92, 93 at the input end so as to connect the end of the bus to the battery or mini-battery 405, 605, which allows the processor 403, 603 to be supplied with power in the absence of a potential from one of the electrical energy sources. Provision may be made in the safety program for a limited number of output switches 47, 48, 67, 68 connected at the end of the bus 401, 601 to remain switched on.

[0074] In order to perform FOTA software modifications, it is advantageous to arrange each distribution box to check whether an electrical consumer affected by the FOTA modification is connected or not connected to its output. This type of check can be implemented by an association table stored in the memory 404,604.

Claims

1. An on-board power supply network (110, 210, 310, 510) in a vehicle (100, 200), the on-board power supply network comprising a plurality of power energy sources (101, 102, 201, 202, 301, 302, 501, 502, 503), comprising at least two distribution boxes (111, 112, 211, 212, 213, 221, 222, 223, 311, 312, 313, 511, 512, 513), each of the at least two distribution boxes comprising: - at least one internal power distribution bus (401, 402, 601, 602, 701) connectable to said source of electrical energy; - at least two output switches (41, 42, 61, 62, 71, 72), each for supplying power from the internal power distribution bus to at least one electrical consumer (31, 32, 51, 52) other than the vehicle; - a driver processor (403, 603, 703) for driving the output switch to distribute the consumption load between the electrical consumers associated with different operating modes of the vehicle, the on-board power supply network comprising a coupling box (305, 505, 506) connected to each electrical energy source and a set of wires (81 to 86, 91 to 98) for connecting each distribution box (311 to 313, 511 to 513) to each coupling box (305, 505, 506), the on-board power supply network being characterized in that each coupling box (505, 506) comprises: - a selector (507, 508) comprising a plurality of switching paths, all of which are connected upstream to the same pole (+) of a source of electrical energy (501, 503) and each of which is connected downstream to an electric line leaving the coupling box; - a control processor (509, 520) for controlling the selector so as to control and monitor the on / off state of each path of the electric wires connected to the same pole assigned to the electric energy source.

2. The vehicle-mounted power supply network according to claim 1, characterized in that: At least one of the output switches (41, 42, 61, 62, 71, 72) includes at least two parallel switch paths, which are connected to the internal power distribution bus upstream through a first common electrical conductor (410, 420, 610, 620, 710, 720) and connected to one of the electrical appliances downstream through a second common electrical conductor (411, 421, 611, 621, 711, 721).

3. The on-board power supply network according to any one of claims 1 and 2, characterized in that At least one of the output switches includes at least one switch path formed by a smart MOS transistor.

4. The on-board power supply network according to any one of claims 1 to 2, characterized in that: Each wire leaving the coupling box is connected to only one internal distribution bus.

5. The on-board power supply network (510) according to any one of claims 1 to 2, characterized in that: A plurality of electric wires leaving the coupling box are distributed in a common manner to at least two distribution boxes (511, 512, 513), and is characterized in that each of the at least two distribution boxes comprises: - an input switch (60, 70) having a plurality of parallel switch paths, each of which is individually connected upstream to one of the allocated electric wires (91 to 98) and is connected downstream in groups, subgroups or individually to one or more internal power distribution buses (601 to 602, 701), the drive processor (603, 703) controlling and monitoring the connection state of each path.

6. The on-board power supply network according to claim 1, characterized in that The operating modes of the vehicle include all or some of the following: parking mode, maintenance mode, logistics mode, driving mode, micro-hybrid mode, autonomous driving mode and failure mode.

7. The on-board power supply network according to one of claims 1 and 2, characterized in that At least one distribution box (311, 511, 221) includes a memory (404, 604, 704) containing diagnostic instructions, and the diagnostic instructions can be accessed by the drive processor (403, 603) to perform diagnostic operations.

8. The on-board power supply network according to one of claims 1 and 2, characterized in that The on-board power supply network comprises an on-board communication bus (80, 90) and a central on-board computer connected to the on-board communication bus, and is characterized in that each drive processor (403, 603, 703) and / or each control processor (509, 520) accesses the on-board communication bus in order to exchange information with the central on-board computer.

9. The on-board power supply network according to one of claims 1 and 2, characterized in that Each driver processor (403, 603, 703) and / or each control processor (509, 520) executes a safety management program when the vehicle is involved in a collision event or loses a communication bus.

10. The on-board power supply network according to one of claims 1 and 2, characterized in that At least two distribution boxes (311, 312) each include a voltage sensor for detecting undervoltage and / or overvoltage on the internal distribution bus (401, 402).

11. A motor vehicle (100, 200) comprising an on-board electrical power supply network (110, 210) as claimed in one of the preceding claims.

Images