Vehicle-mounted high-reliability power supply and distribution system and power distribution method thereof

Abstract

The invention relates to a vehicle-mounted high-reliability power supply and distribution system and method. The system comprises a first power battery pack, a first direct-current bus, a second power battery pack, a distribution box and a second direct-current bus, the first battery pack is connected with the first DC bus through the first main switch to form a first power supply branch; the second battery pack is connected with the second DC bus through the second main switch to form a second power supply branch; and a cross power supply switch circuit is arranged between the first direct current bus and the second direct current bus. And the power supply branches are configured as follows: when an open circuit fault occurs in any branch, the power battery pack on the other side supplies power to the fault side bus through the main switch and the cross circuit. According to the invention, H-shaped bridge type cross power supply between two branches is realized, and the system reliability is obviously improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of vehicle-mounted power supply and distribution, and particularly relates to a vehicle-mounted high-reliability power supply and distribution system and a power distribution method thereof. BACKGROUND

[0002] Under the background of the rapid development of current transportation and special operation vehicles, new energy electric vehicles, fuel / oil vehicles and fuel-electric hybrid vehicles and other types of vehicles have increasingly stringent high reliability requirements for their vehicle-mounted power supply and distribution systems. This demand not only stems from the high dependence of vehicle operation on the power system, but more importantly, many special purpose vehicles (such as mobile energy storage vehicles, high pressure detection vehicles, laser destruction vehicles, emergency rescue platforms, etc.) usually carry complex on-board operation equipment, which have very high requirements for the continuity, stability and system redundancy capability of power supply.

[0003] Once the power supply and distribution system fails, it may not only cause task interruption and equipment damage, but also cause serious safety accidents or significant economic losses. Therefore, building a vehicle-mounted power supply and distribution system that can simultaneously ensure continuous, stable and reliable power supply for the vehicle body and the loaded operation equipment has become a key technical bottleneck in the current development of vehicle electrification and intelligentization.

[0004] Although the existing related technologies have made beneficial explorations in multiple dimensions, they generally have the limitation of "emphasizing function implementation and neglecting system reliability". For example, existing solutions propose to realize flexible power supply to external loads (including new energy vehicles and other electrical appliances) through mobile energy storage vehicles, but the design focus is on the multipurpose nature of energy output, without considering how to maintain continuous power supply to on-board equipment when the vehicle-mounted main power supply or power distribution unit fails. Another research is dedicated to developing a universal vehicle-mounted power supply and distribution architecture that can adapt to electrical equipment of different power levels and interface types, thereby avoiding repeated configuration, but this type of solution also does not introduce a redundancy mechanism, and the entire on-board system will still lose power when a key component fails.

[0005] In addition, some existing technologies focus on improving the power supply stability of the electronic systems of intelligent driving vehicles, enhancing the operation reliability of vehicle-mounted controllers, sensors and other core components through optimized power management strategies, but their protection range is limited to the vehicle chassis control system and does not extend to task-related on-board operation equipment. There are also solutions that configure multiple AC and DC power supply interfaces to improve the power supply continuity of on-board equipment in normal driving state, but when a single point failure occurs at the key nodes such as the comprehensive power supply module and the power distribution box, the entire on-board system will still lose power supply, and the overall system reliability has not been substantially improved.

[0006] Other technological approaches include: developing multi-mode switching energy storage power supply and distribution systems to adapt to power demand under different operating conditions; using diesel generator sets to build efficient AC / DC hybrid power supply systems to improve energy conversion efficiency; designing power supply and distribution architectures with both conventional and emergency dual-mode operation capabilities to cope with sudden power outage scenarios; launching integrated AC / DC power supply and distribution devices to save vehicle space and optimize charging and discharging interfaces; realizing integrated and modular design of power supply and distribution systems to improve economy and deployment flexibility; and building mobile uninterruptible power supply systems for on-site emergency support.

[0007] Although the above solutions have made some progress in terms of functionality, integration, energy efficiency, or ease of deployment, they all neglect the high reliability design of the overall power supply link of the "vehicle body + superstructure operating equipment", and in particular lack the fault tolerance and continuous power supply capability in the event of failure of key power supply components. Summary of the Invention

[0008] In view of the technical problems existing in the background art, and in order to improve the reliability of vehicle power supply and distribution, a first aspect of the present invention provides a vehicle-mounted high-reliability power supply and distribution system, comprising: The system comprises a first power battery pack, a first distribution box, a second power battery pack, and a second distribution box, as well as a cross-power supply switch circuit connected between the first DC bus and the second DC bus. The first distribution box contains a first DC bus, and the second distribution box contains a second DC bus. A first main switch is disposed between the first power battery pack and the first DC bus. A second main switch is disposed between the second power battery pack and the second DC bus. The first power battery pack, the first main switch, and the first DC bus form a first power supply branch. The second power battery pack, the second main switch, and the second DC bus form a second power supply branch. The cross-power supply switch circuit is configured to: when a circuit breaker fault occurs in the first power supply branch, supply power from the second power battery pack to the first DC bus via the second main switch and the cross-power supply switch circuit; and when a fault occurs in the second power supply branch, supply power from the first power battery pack to the second DC bus via the first main switch and the cross-power supply switch circuit, thereby achieving H-type bridge cross-power supply between the two power supply branches.

[0009] In some embodiments of the present invention, the cross power supply switch circuit includes: a first H-bridge connection switch disposed inside the first distribution box and electrically connected to the first DC bus; and a second H-bridge connection switch disposed inside the second distribution box and electrically connected to the second DC bus; when either the first H-bridge connection switch or the second H-bridge connection switch is closed, an electrical connection can be established between the first DC bus and the second DC bus, thereby realizing cross power supply between the two power supply branches.

[0010] In some embodiments of the present application, the first power distribution box and the second power distribution box have the same structural form and rated electrical parameters.

[0011] In some embodiments of the present application, an external power supply interface, a power unit and a rectifier device are further included, the external power supply interface is used to access the AC power supply output by the commercial power or diesel generator set, the power unit is used to provide power energy to the vehicle and its loading equipment and output AC power, the AC side of the rectifier device is electrically connected with the external power supply interface and the power unit respectively, and the DC side thereof is electrically connected with the first DC bus and / or the second DC bus, so as to convert the AC power supply into DC power to supply power to the power supply branch.

[0012] In some embodiments of the present application, an inverter device and a modular DC converter array are further included, the DC input end of the inverter device is electrically connected with the first DC bus and / or the second DC bus, the AC output end thereof is used to supply power to the vehicle AC load to convert the DC power into AC power, and the DC input end of the modular DC converter array is electrically connected with the first DC bus and / or the second DC bus, and the plurality of DC output ends thereof are respectively used to provide the DC power energy converted by boosting or step-down conversion to the plurality of DC loads.

[0013] Further, in the normal power supply state, the first H-bridge connection switch and the second H-bridge connection switch are both in the open state; when the circuit breaking fault occurs in any power supply branch, only one of the first H-bridge connection switch and the second H-bridge connection switch is closed to establish the cross power supply path between the first DC bus and the second DC bus.

[0014] In the second aspect of the present application, a power distribution method of the vehicle high-reliability power supply and distribution system based on the first aspect of the present application is provided, which comprises: In the normal power supply state, the first power battery pack supplies power to the first DC bus through the first main switch, and the second power battery pack supplies power to the second DC bus through the second main switch, so as to supply power to the vehicle load connected to the first DC bus and the second DC bus respectively; when the circuit breaking fault occurs in the first power supply branch, the cross power supply switch circuit is controlled to be conductive, so that the second power battery pack supplies power to the first DC bus through the second main switch and the cross power supply switch circuit; when the circuit breaking fault occurs in the second power supply branch, the cross power supply switch circuit is controlled to be conductive, so that the first power battery pack supplies power to the second DC bus through the first main switch and the cross power supply switch circuit.

[0015] In a third aspect, the present application provides an electronic device, comprising: one or more processors; and a memory device storing one or more programs, when the one or more programs are executed by the one or more processors, the one or more processors implement the power distribution method of the vehicle high-reliability power supply and distribution system provided in the second aspect of the present application.

[0016] In a fourth aspect, the present application provides a computer readable medium having stored thereon a computer program, wherein the computer program, when executed by a processor, implements the power distribution method of the vehicle high-reliability power supply and distribution system provided in the second aspect of the present application.

[0017] The present application has the following beneficial effects: The present application realizes double-path cross power supply of the vehicle and its loading operation equipment through the H-shaped bridge type double-path cross power supply mode, and still guarantees power supply of the vehicle and its loading operation equipment when a single power supply equipment fails, so that the present application has higher power supply reliability. The present application realizes double-path cross power supply online mutual hot backup of the vehicle and its loading operation equipment through split design and arrangement of the energy storage power supply device, so that the present application has good power supply guarantee.

[0018] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings used in the present application. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating laborious work.

[0020] Figure 1 The basic structure schematic diagram of the vehicle high-reliability power supply and distribution system in some embodiments of the present application; Figure 2 The specific structure schematic diagram of the vehicle high-reliability power supply and distribution system in some embodiments of the present application; Figure 3 The internal switch connection schematic diagram of the power distribution box in some embodiments of the present application; Figure 4 The flowchart schematic diagram of the power distribution method of the vehicle high-reliability power supply and distribution system in some embodiments of the present application; Figure 5 The structure schematic diagram of the electronic device in some embodiments of the present application.

[0021] Reference Signs List: 10, first power battery pack; 20, first main switch; 30, first distribution box; 40, second power battery pack; 50, second main switch; 60, second distribution box; 70, cross power supply switch circuit. DETAILED DESCRIPTION

[0022] The embodiments of the technical solution of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0023] In the following description, specific details are set forth in order to provide a thorough understanding of the embodiments of the present application, such as particular system structures, techniques, etc. However, it should be apparent to those skilled in the art that the present application can be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary details.

[0024] The term "comprising" herein indicates the presence of the described features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or sets thereof. The terms "comprising", "including", "having" and their variants mean "including but not limited to", excluding otherwise specifically noted. Hereinafter, the terms "first", "second" are only used for description purposes and cannot be understood as indicating or implying relative importance or implicitly indicating one or more features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise specified.

[0025] Reference Figure 1 With Figure 2 In the first aspect of the present application, an aspect of the present application provides a vehicle-mounted high-reliability power supply and distribution system, comprising: The first power battery pack 10, the first distribution box 30, the second power battery pack 40, and the second distribution box 60, and the cross power supply switch circuit 70 connected between the first DC bus and the second DC bus, and the first DC bus is provided in the first distribution box 30, and the second DC bus is provided in the second distribution box 60; Further comprising: the first main switch 20 arranged between the first power battery pack 10 and the first DC bus, and the second main switch 50 arranged between the second power battery pack 40 and the second DC bus.

[0026] The first power battery pack 10, the first main switch 20 and the first DC bus form the first power supply branch; the second power battery pack 40, the second main switch 50 and the second DC bus form the second power supply branch.

[0027] It should be noted that the aforementioned cross power supply switch circuit 70 is configured to: when the first power supply branch experiences an open circuit fault, enable the second power battery pack 40 to supply power to the first DC bus via the second main switch 50 and the cross power supply switch circuit 70; and when the second power supply branch experiences a fault, enable the first power battery pack 10 to supply power to the second DC bus via the first main switch 20 and the cross power supply switch circuit 70, so as to realize H-type bridge cross power supply between the two power supply branches.

[0028] refer to Figure 3 In some embodiments of the present invention, the cross power supply switch circuit 70 includes: a first H-bridge connection switch disposed inside the first distribution box 30 and electrically connected to the first DC bus; and a second H-bridge connection switch disposed inside the second distribution box 60 and electrically connected to the second DC bus.

[0029] In some embodiments, when either the first H-bridge connection switch or the second H-bridge connection switch is closed, an electrical connection can be established between the first DC bus and the second DC bus, thereby enabling cross-power supply between the two power supply branches.

[0030] Furthermore, under normal power supply conditions, both the first H-bridge connection switch and the second H-bridge connection switch are in the open state; when a circuit failure occurs in any power supply branch, only one of the first H-bridge connection switch and the second H-bridge connection switch is closed to establish a cross power supply path between the first DC bus and the second DC bus.

[0031] Specifically, such as Figure 3 As shown, the main switches inside the first distribution box 30 and the second distribution box 60 are connected as follows: Figure 3 As shown, the power battery pack and the distribution box are split into two power supply branches. The first distribution box 30 and the second distribution box 60 have the same product design specifications and parameters, and can be interchanged.

[0032] In some specific embodiments, the H-bridge connection switch inside the first distribution box 30 is 1A, and the H-bridge connection switch inside the second distribution box 60 is 2A. Thus, in practical use, only one of the 1A or 2A switches is needed to achieve H-bridge cross power supply. Figure 3 The connection shown is using 1A; 2A is not used.

[0033] If the first power supply branch composed of the first power battery pack 10 and S1 has a circuit breaking failure, 1A can be closed to supply power to the DC bus inside the first distribution box 30 through the second power battery pack 40 via S2 and 1A, and the output of the first distribution box 30 can continue to supply power. Similarly, if the second power supply branch composed of the second power battery pack 40 and S2 has a circuit breaking failure, 1A can be closed to supply power to the DC bus inside the second distribution box 60 through the first power battery pack 10 via S1 and 1A, and the output of the second distribution box 60 can continue to supply power. In this way, H-bridge cross power supply is realized, and the reliability of the power supply and distribution system is improved.

[0034] In some embodiments of the application, the first distribution box 30 and the second distribution box 60 have the same structural form and rated electrical parameters, so as to facilitate the mutual replacement of the first distribution box 30 and the second distribution box 60.

[0035] Reference Figure 2 In some embodiments of the application, an external power supply interface, a power unit, and a rectifier device are further included. The external power supply interface is used to access the AC power supply output by the city power or the diesel generator set. The power unit is used to provide power energy to the vehicle and its loading equipment and output AC power. The AC side of the rectifier device is electrically connected with the external power supply interface and the power unit respectively, and the DC side thereof is electrically connected with the first DC bus and / or the second DC bus, for converting AC power into DC power to supply power to the power supply branch.

[0036] Specifically, the external power supply interface is used to connect the AC power supply from the outside such as the city power or the diesel generator set; the power unit is used to provide power energy to the vehicle and its loading equipment; the first power battery pack 10 and the second power battery pack 40 are used for short-time energy storage and power supply of the vehicle and its loading equipment; the ACDC is used to convert the AC power output by the power unit or provided by the external power supply interface into DC power; the DCAC is used to convert the DC power into AC power; the first distribution box 30 and the second distribution box 60 are used to realize the distribution and switching control of DC power; the DCDC array is used to convert the DC power output by the distribution box into DC power after boosting or reducing, and then provide the DC power to the subsequent multi-way load; and the electrical equipment is connected through the cable.

[0037] It should be noted that the external power supply interface is used to connect the external AC power supply such as the mains or diesel generator set; the power unit is used to provide power energy for the vehicle and its loading equipment; the first power battery pack 10 and the second power battery pack 40 are used for short-time energy storage and power supply for the vehicle and its loading equipment; the ACDC is used to convert the AC power output by the power unit or the AC power provided by the external power supply interface into DC power; the DCAC is used to convert the DC power into AC power; the distribution box 1 and the distribution box 2 are used to realize the distribution and on-off control of the DC power; the DCDC array is used to convert the DC power output by the distribution box into DC power for the subsequent multi-path load; and the electrical equipment is connected through the cable.

[0038] Reference Figure 3 In some embodiments of the present application, an inverter device and a modular DC converter array are further included, the DC input end of the inverter device is electrically connected with the first DC bus and / or the second DC bus, and the AC output end thereof is used to supply power to the vehicle-mounted AC load to convert the DC power into AC power; the DC input end of the modular DC converter array is electrically connected with the first DC bus and / or the second DC bus, and the plurality of DC output ends thereof are respectively used to provide the multi-path DC load with the DC power converted by the voltage step-up or step-down.

[0039] When any power supply branch fails (for example, a circuit breaking fault occurs, or a protection action causes the branch to exit work, etc.), the corresponding DC bus cannot obtain normal power supply from the power supply branch, and another power supply branch provides power for the DC bus through the cross power supply switch circuit.

[0040] Reference Figure 4 According to a second aspect of the present application, a power distribution method based on the vehicle-mounted high-reliability power supply and distribution system of the first aspect is provided, which comprises: S100. In the normal power supply state, the first power battery pack is controlled to supply power to the first DC bus through the first main switch, and the second power battery pack is controlled to supply power to the second DC bus through the second main switch, so as to supply power to the vehicle-mounted load connected to the first DC bus and the second DC bus, respectively; S200. When the first power supply branch fails, the cross power supply switch circuit is controlled to be turned on, so that the second power battery pack supplies power to the first DC bus through the second main switch and the cross power supply switch circuit; S300. When the second power supply branch fails, the cross power supply switch circuit is controlled to be turned on, so that the first power battery pack supplies power to the second DC bus through the first main switch and the cross power supply switch circuit.

[0041] Further, in the step S200, when the first power supply branch has a circuit breaking failure, the control of the cross power supply switch circuit to be conducted includes: detecting the bus voltage and / or current of the first power supply branch, when the bus voltage and / or current is lower than a preset threshold, determining that the first power supply branch has a circuit breaking failure, and controlling one end of the cross power supply switch circuit connected with the first DC bus to be conducted, so as to establish a power supply path from the second power battery pack to the first DC bus.

[0042] Reference Figure 5 In a third aspect, the present application provides an electronic device, comprising: one or more processors; a storage device configured to store one or more programs, when the one or more programs are executed by the one or more processors, the one or more processors implement the power distribution method of the vehicle-mounted high-reliability power supply and distribution system in the second aspect of the present application.

[0043] The electronic device 500 can include a processing device (e.g., a central processing unit, a graphics processing unit, etc.) 501 that can perform various appropriate actions and processes according to programs stored in a read-only memory (ROM) 502 or loaded into a random access memory (RAM) 503 from a storage device 508. Various programs and data required for the operation of the electronic device 500 are also stored in the RAM 503. The processing device 501, the ROM 502, and the RAM 503 are connected to each other through a bus 504. An input / output (I / O) interface 505 is also connected to the bus 504.

[0044] Generally, the following devices can be connected to the I / O interface 505: input devices 506 including, for example, a touch screen, a touch pad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, etc.; output devices 507 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 508 including, for example, a hard disk, etc.; and communication devices 509. The communication devices 509 can allow the electronic device 500 to communicate with other devices wirelessly or through wires to exchange data. Although Figure 5 The electronic device 500 is shown with various devices, but it should be understood that not all of the shown devices are required to be implemented or present. More or fewer devices can alternatively be implemented or present. Figure 5 Each block shown in the figure can represent a device or multiple devices as needed.

[0045] In particular, according to embodiments of the present disclosure, the processes described above with reference to the flowcharts can be implemented as a computer software program. For example, embodiments of the present disclosure include a computer program product comprising a computer program carried on a computer readable medium, the computer program containing program code for executing the methods illustrated by the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network by the communication device 509, or installed from the storage device 508, or installed from the ROM 502. When the computer program is executed by the processing device 501, the above-mentioned functions defined in the methods of embodiments of the present disclosure are executed. It should be noted that the computer readable medium described in embodiments of the present disclosure can be a computer readable signal medium or a computer readable storage medium or any combination of the two. The computer readable storage medium may, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or apparatus, or any combination of the above. More specific examples of the computer readable storage medium can include, but are not limited to, an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In embodiments of the present disclosure, the computer readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, device or apparatus. In embodiments of the present disclosure, the computer readable signal medium can include a data signal carried in a baseband or as part of a carrier wave, in which the computer readable program code is carried. Such a propagated data signal can take a variety of forms, including but not limited to, an electromagnetic signal, an optical signal, or any suitable combination of the above. The computer readable signal medium can also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate or transport a program for use by or in connection with an instruction execution system, device or apparatus. The program code contained on the computer readable medium can be transmitted by any suitable medium, including but not limited to, wire, cable, RF (radio frequency), or the like, or any suitable combination of the above.

[0046] The computer readable medium described above can be included in the electronic device described above; or can exist separately from the electronic device and not be assembled into the electronic device. The computer readable medium described above carries one or more computer programs, which, when executed by the electronic device, cause the electronic device to: Computer program code for carrying out operations of embodiments of the present disclosure can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++, Python, and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer, or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0047] The computer program instructions can also be loaded onto a computer or other programmable information processing apparatus to cause a series of operations to be performed on the computer or other programmable information processing apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable information processing apparatus implement the functions / acts specified in the flowchart and / or block diagram block or blocks.

[0048] The above descriptions are only the preferred embodiment of the application, not intended to limit the application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A high reliability power supply and distribution system for vehicles, characterized in that, Comprise: a first power battery pack, a first distribution box, a second power battery pack, a second distribution box, and a cross power supply switch circuit connected between the first DC bus and the second DC bus, the first distribution box is provided with a first DC bus, and the second distribution box is provided with a second DC bus; a first main switch is arranged between the first power battery pack and the first DC bus; and a second main switch is arranged between the second power battery pack and the second DC bus; the first power battery pack, the first main switch, and the first DC bus form a first power supply branch; the second power battery pack, the second main switch, and the second DC bus form a second power supply branch, the cross power supply switch circuit is configured to: when a circuit breaking fault occurs in the first power supply branch, make the second power battery pack supply power to the first DC bus through the second main switch and the cross power supply switch circuit; and when a fault occurs in the second power supply branch, make the first power battery pack supply power to the second DC bus through the first main switch and the cross power supply switch circuit, to realize H-type bridge cross power supply between the two power supply branches.

2. The on-vehicle high-reliability power supply and distribution system according to claim 1, characterized by, The cross power supply switch circuit comprises: a first H-bridge connection switch arranged inside the first distribution box and electrically connected with the first DC bus; and a second H-bridge connection switch arranged inside the second distribution box and electrically connected with the second DC bus; When either of the first H-bridge connection switch and the second H-bridge connection switch is closed, an electrical connection can be established between the first DC bus and the second DC bus, realizing cross power supply between the two power supply branches.

3. The on-vehicle high-reliability power supply and distribution system according to claim 2, characterized by, In a normal power supply state, the first H-bridge connection switch and the second H-bridge connection switch are both in an open state; when a circuit breaking fault occurs in any power supply branch, only one of the first H-bridge connection switch and the second H-bridge connection switch is closed to establish a cross power supply path between the first DC bus and the second DC bus.

4. The on-vehicle high-reliability power supply and distribution system according to claim 1, characterized by, The first distribution box and the second distribution box have the same structural form and rated electrical parameters.

5. The on-vehicle high-reliability power supply and distribution system according to claim 1, characterized by, Further comprising an external power source interface, a power unit, and a rectifier device, the external power source interface is used to access the AC power supply output by the city power or diesel generator set, the power unit is used to provide power energy to the vehicle and its loading equipment and output AC power, the AC side of the rectifier device is electrically connected with the external power source interface and the power unit respectively, and the DC side thereof is electrically connected with the first DC bus and / or the second DC bus, for converting the AC power supply into DC power to supply power to the power supply branch.

6. The on-vehicle high-reliability power supply and distribution system according to claim 1, characterized by, Further comprising an inverter device and a modular DC converter array, The direct current input end of the inverter device is electrically connected with the first direct current bus and / or the second direct current bus, and the alternating current output end is used for supplying power to the vehicle-mounted alternating current load to convert direct current into alternating current; the direct current input end of the modular direct current converter array is electrically connected with the first direct current bus and / or the second direct current bus, and the plurality of direct current output ends are respectively used for providing the plurality of direct current loads with direct current power after being boosted or stepped-down converted.

7. A power distribution method based on the vehicle-mounted high-reliability power supply and distribution system according to claim 1, characterized by, Comprise: In a normal power supply state, the first power battery pack is controlled to supply power to the first direct current bus through the first main switch, and the second power battery pack is controlled to supply power to the second direct current bus through the second main switch, so as to supply power to the vehicle-mounted load connected to the first direct current bus and the second direct current bus, respectively; When a first power supply branch occurs a circuit breaking fault, the cross power supply switch circuit is controlled to be turned on, so that the second power battery pack supplies power to the first direct current bus through the second main switch and the cross power supply switch circuit; When a second power supply branch occurs a circuit breaking fault, the cross power supply switch circuit is controlled to be turned on, so that the first power battery pack supplies power to the second direct current bus through the first main switch and the cross power supply switch circuit.

8. The power distribution method of the high reliability power supply and distribution system for vehicle according to claim 7, characterized by, The control of the cross power supply switch circuit to be turned on when the first power supply branch occurs a circuit breaking fault comprises: Detecting the bus voltage and / or current of the first power supply branch, and when the bus voltage and / or current is lower than a preset threshold, determining that the first power supply branch occurs a circuit breaking fault, and controlling one end of the cross power supply switch circuit connected with the first direct current bus to be turned on, so as to establish a power supply path of the second power battery pack to the first direct current bus.

9. An electronic device comprising: One or more processors; A storage device for storing one or more programs, when the one or more programs are executed by the one or more processors, the one or more processors implement the power distribution method of the vehicle-mounted high reliability power supply and distribution system according to any one of claims 7 to 8.

10. A computer readable medium having stored thereon a computer program, wherein, The computer program is executed by the processor to implement the power distribution method of the vehicle-mounted high reliability power supply and distribution system according to any one of claims 7 to 8.

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