A novel integrated communication and power supply device for automobiles and a communication networking method

Abstract

This invention discloses a novel integrated communication and power supply device and communication networking method for automobiles. The device includes vehicle subsystems, subsystem wiring harnesses, an Ethernet gateway module, and an on-board power supply. Each vehicle subsystem is connected to the Ethernet gateway module via a subsystem wiring harness, and the Ethernet gateway module is connected to the vehicle body management system (BCM). The on-board power supply supplies power to each vehicle subsystem through the subsystem wiring harnesses, and also supplies power to the Ethernet gateway module and the BCM system via power lines. This invention provides a novel integrated communication and power supply device and communication networking method for automobiles. Addressing the current trend of vehicle intelligence and the practical need for exponentially increasing communication bandwidth for internal vehicle devices, this invention proposes an optimized solution that can both meet the increased communication demands brought about by vehicle intelligence and appropriately reduce vehicle manufacturing and maintenance costs.

Description

TECHNICAL FIELD

[0001] The present application relates to a new type of automobile whole vehicle communication and power supply integrated device and communication networking method. BACKGROUND

[0002] At present, the communication and power supply modules of the subsystems of the existing whole vehicle are independent of each other, and each subsystem has corresponding communication and power supply cables. The power supply and communication of the subsystems of the automobile are independent of each other, and the automobile engineer needs to set up a set of (power supply and communication) wire harness for each set of subsystem. When the automobile expands the subsystem, the automobile wire harness and the automobile body structure need to be redesigned, and the corresponding space is designed for the new subsystem wire harness. The communication modes of the subsystems are various, including can, lin and other communication modes, the communication protocol of the subsystems is a private protocol, and the power supply of each subsystem is directly connected to the vehicle power supply.

[0003] The communication and power supply modules of the subsystems of the above-mentioned existing whole vehicle are independent of each other, each subsystem has corresponding communication and power supply cables, and the disadvantages are as follows:

[0004] 1. Generally, the length of the cables of a vehicle can reach 4.8-9 kilometers, and the heavy weight and disordered arrangement of the cables also bring difficulties to the later maintenance and repair.

[0005] 2. Since the wire harness is heavy and long, the fuel consumption of the automobile is increased, and abnormal noise is easily caused during vehicle driving.

[0006] 3. In the era of electric vehicles, the subsystems of the automobile are increasing, resulting in more and more complex wire harness of the subsystems.

[0007] 4. The communication modes of the subsystems are various, including can, lin and other communication modes, and the communication protocol of the subsystems is a private protocol. This brings more difficulties to the integration of the automobile, the data sharing and the addition of new functions.

[0008] 5. The power supply of each subsystem is directly connected to the vehicle power supply, resulting in the problem of too long automobile power supply line. SUMMARY

[0009] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art, provide a new type of automobile whole vehicle communication and power supply integrated device and communication networking method, and provide an optimization scheme which can meet the large communication demand brought by the intelligentization of the vehicle and appropriately reduce the manufacturing and maintenance cost of the vehicle in view of the actual demand for the exponential increase of the communication bandwidth of the internal equipment of the vehicle.

[0010] In order to solve the above technical problems, the technical scheme of the present application is as follows:

[0011] The application provides a new type of automobile communication and power supply integrated device, which comprises a vehicle subsystem, a subsystem wire harness, an Ethernet gateway module and a vehicle power supply.

[0012] Each of the vehicle subsystems is connected to the Ethernet gateway module through a subsystem wire harness, and the Ethernet gateway module is connected to a body BCM system.

[0013] The vehicle power supply supplies power to each of the vehicle subsystems through the subsystem wire harness, and supplies power to the Ethernet gateway module and the body BCM system through a power supply wire.

[0014] Further, the vehicle subsystems comprise an air conditioning system, a remote monitoring system, an engine controller, a motor controller, a variable box controller, a body stability system, a battery management system, a power management system, a power converter, a door lock system, a seat system, a fault diagnosis system, an intelligent instrument, an adaptive cruise system, an automatic sunroof system and an electronic power steering system.

[0015] Further, the Ethernet gateway module comprises a first Ethernet gateway and a second Ethernet gateway, and the first Ethernet gateway and the second Ethernet gateway are connected to the body BCM system through optical fibers respectively.

[0016] Further, the body stability system, the variable box controller, the motor controller, the engine controller, the remote monitoring system and the air conditioning system are connected to the first Ethernet gateway through subsystem wire harnesses respectively, and the body stability system, the variable box controller, the motor controller, the engine controller, the remote monitoring system and the air conditioning system form a UDP multicast.

[0017] Further, the electronic power steering system, the automatic sunroof system, the adaptive cruise system, the intelligent instrument and the fault diagnosis system are connected to the first Ethernet gateway through subsystem wire harnesses respectively, and the electronic power steering system, the automatic sunroof system, the adaptive cruise system, the intelligent instrument and the fault diagnosis system form a UDP multicast.

[0018] Further, the seat system, the door lock system, the power converter, the power management system and the battery management system are connected to the second Ethernet gateway through subsystem wire harnesses respectively, and the seat system, the door lock system, the power converter, the power management system and the battery management system form a UDP multicast.

[0019] Further, the subsystem wire harness comprises a wire harness shell, and a positive power supply wire, a negative power supply wire and a signal twisted pair wire are arranged in the wire harness shell, and a shielding layer is arranged on the outer periphery of the signal twisted pair wire.

[0020] Further, the signal twisted pair wire is provided with four pairs, and the shielding layer is arranged on the outer periphery of the four pairs of signal twisted pair wires.

[0021] Another aspect of the present application provides a communication networking method of a new type of automobile whole vehicle communication and power supply integrated device, which comprises:

[0022] Step S1, a plurality of subsystems cooperating with each other form a UDP multicast, and each subsystem in the UDP multicast has a heartbeat module, a sending module and a receiving module;

[0023] Step S2, the Ethernet gateway module monitors the heartbeat data of each subsystem and establishes corresponding file data with the subsystem, when the heartbeat data of the subsystem is sent abnormally, it is determined that the subsystem is in a dead state, and the subsystem in the dead state is restarted by the POE function of the Ethernet gateway module;

[0024] Step S3, the Ethernet gateway module monitors the sleep command of the vehicle body BCM system, and closes the power supply of the corresponding subsystem according to the sleep command of the vehicle body BCM system;

[0025] Step S4, the Ethernet gateway module monitors the data command of the vehicle body BCM system, and judges the target subsystem sleep command sent by the vehicle body BCM system, and automatically opens the related subsystem by the Ethernet gateway module.

[0026] Further, the format of the heartbeat data is:

[0027] Heartbeat ID + function ID;

[0028] The format of the command data is:

[0029] Command ID area + function ID area + command content length area + command content area;

[0030] Among them, the function ID is used for sleep wake-up and dynamic reduction of UDP multicast.

[0031] By adopting the above technical scheme, the present application has the following beneficial effects:

[0032] 1. The communication and power supply integrated cable can effectively reduce the length of the whole vehicle cable, and the total length of the cable can be reduced from several kilometers to several tens of meters. The assembly process and working hours are reduced, the cost of automobile wiring harness is reduced, and the use of unified standard wiring harness can effectively reduce the cost of wiring harness and warehouse storage cost.

[0033] 2. The Ethernet gateway device is not only a communication management center, but also a power supply with voltage stabilization function. This design can significantly reduce the abnormal voltage protection design requirements and cost of each subsystem.

[0034] 3. By combining integrated wiring harnesses and Ethernet gateway devices, segmented deployment of vehicle wiring harnesses is achieved. During maintenance, only the damaged section of the wiring harness needs to be replaced, effectively reducing the maintenance cost of vehicle wiring harnesses.

[0035] 4. Effectively resolves the contradiction between vehicle intelligence and insufficient communication bandwidth.

[0036] 5. By combining integrated wiring harnesses, Ethernet gateway devices, and optical fibers, costs are effectively reduced while ensuring communication bandwidth. Attached Figure Description

[0037] Figure 1 This is a block diagram illustrating the hardware module principle of the novel integrated vehicle communication and power supply device of the present invention.

[0038] Figure 2 This is a schematic diagram of the subsystem wiring harness of the present invention;

[0039] Figure 3 This is a flowchart of the communication networking method of the present invention. Detailed Implementation

[0040] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0041] Example 1

[0042] like Figure 1 As shown, this embodiment provides a novel integrated communication and power supply device for automobiles, which includes a vehicle subsystem, a subsystem wiring harness, an Ethernet gateway module, and an on-board power supply.

[0043] Each of the vehicle subsystems is connected to an Ethernet gateway module via a subsystem wiring harness, and the Ethernet gateway module is connected to the vehicle body management system via optical fiber. This combination of integrated wiring harnesses and Ethernet gateway devices enables segmented deployment of the vehicle wiring harnesses, allowing for maintenance by simply replacing the damaged section.

[0044] The vehicle power supply provides power to each vehicle subsystem through the subsystem wiring harness, and the vehicle power supply provides power to the Ethernet gateway module and the body BCM system through the power cable.

[0045] Among them, such as Figure 2 As shown, the subsystem wiring harness in this embodiment includes a wiring harness housing 1. The housing 1 contains a positive power line 2, a negative power line 3, and signal twisted pairs 5. A shielding layer 4 is provided around the outer periphery of each signal twisted pair 5. In this embodiment, there are four pairs of signal twisted pairs 5, and the shielding layer 4 is disposed around the outer periphery of the four pairs of signal twisted pairs 5.

[0046] The subsystem harness adopts 8+2 mode, in which 4 pairs of 8 shielded signal twisted pairs 5 are used for UDP communication, which can realize 1000M bandwidth and lower latency communication. 2 positive power lines 2 and negative power lines 3 adopt thickened harness, which can pass through 50A current and is used for power supply of each vehicle subsystem. The main communication network adopts optical fiber to connect the first and second Ethernet gateways before and after the vehicle, and the first and second Ethernet gateways are responsible for communication connection and 13.5V power supply between modules. The vehicle Ethernet gateway and the body BCM system are respectively connected to the vehicle 13.5 power supply.

[0047] In the embodiment, the vehicle Ethernet gateway module can realize udp communication and single interface maximum 50A current power supply capacity. The unified vehicle communication mode and cable mode are used to optimize and reduce the length of normal harness, flatten vehicle management and add submodules at low cost. The combination of network cable and optical fiber provides high bandwidth and low latency communication for the vehicle. It provides a basic platform for unmanned and intelligent vehicles in the automotive era.

[0048] As shown in Figure 1 , the vehicle subsystems of the embodiment include air conditioning system, remote monitoring system, engine controller, motor controller, variable box controller, body stability system, battery management system, power management system, power converter, door lock system, seat system, fault diagnosis system, intelligent instrument, adaptive cruise control system, automatic sunroof system and electronic power steering system. As shown in Figure 1 , the Ethernet gateway module of the embodiment includes first and second Ethernet gateways, which are connected to the body BCM system through optical fiber. The Ethernet gateway device is not only a communication management center, but also a power supply with voltage stabilization function. This design can significantly reduce the abnormal voltage protection design requirements and cost of each subsystem.

[0050] In the embodiment, the subsystems are divided into three groups, and several subsystems that need to cooperate with each other in work are divided into a group, and each group constitutes a UDP multicast group.

[0051] As shown in Figure 1 , the body stability system, variable box controller, motor controller, engine controller, remote monitoring system and air conditioning system of the embodiment are connected to the first Ethernet gateway through the subsystem harness, and the body stability system, variable box controller, motor controller, engine controller, remote monitoring system and air conditioning system constitute the first UDP multicast group.

[0052] As shown in Figure 1As shown, in this embodiment, the electronic power steering system, automatic sunroof system, adaptive cruise control system, smart instrument panel and fault diagnosis system are respectively connected to the first Ethernet gateway through subsystem wiring harnesses. The electronic power steering system, automatic sunroof system, adaptive cruise control system, smart instrument panel and fault diagnosis system form a second UDP multicast.

[0053] like Figure 1 As shown, in this embodiment, the seat system, door lock system, power converter, power management system, and battery management system are respectively connected to the second Ethernet gateway through subsystem wiring harnesses. The seat system, door lock system, power converter, power management system, and battery management system form a third UDP multicast.

[0054] Example 2

[0055] like Figure 3 As shown, this embodiment provides a communication networking method for a novel integrated vehicle communication and power supply device, which includes:

[0056] Step S1, Reference Figure 1 The hardware module principle block diagram shows that multiple cooperating subsystems form a UDP multicast. At the same time, a subsystem can add multiple multicasts according to business needs. Each subsystem in the UDP multicast has a heartbeat module, a sending module, and a receiving module.

[0057] Step S2: The Ethernet gateway module is responsible for monitoring the heartbeat data of each subsystem and establishing corresponding file data for each subsystem. When the heartbeat data of a subsystem is sent abnormally, it is determined that the subsystem is in a dead state. The Ethernet gateway module should use its PoE function to power off and restart the dead subsystem in a timely manner.

[0058] Step S3: The Ethernet gateway module is responsible for monitoring the sleep commands of the vehicle body BCM system and shutting down the power of the corresponding subsystems according to the sleep commands of the vehicle body BCM system.

[0059] Step S4: The Ethernet gateway module is responsible for monitoring the data commands of the vehicle body BCM system and determining the target subsystem hibernation command sent by the vehicle body BCM system. The Ethernet gateway module will then automatically start the relevant subsystem.

[0060] The format of the heartbeat data is as follows:

[0061] Heartbeat ID (2 bytes) + Function ID (2 bytes);

[0062] The format of the command data is:

[0063] Command ID area (2 bytes) + Function ID area (2 bytes) A command content length area (2 bytes in size) + a command content area (max 1388 bytes) ;

[0064] The function ID is used for sleep wake-up, dynamic further reduction of UDP multicast, and the function ID area in the embodiment can contain function IDs of 40 subsystems.

[0065] The UDP multicast communication mode can realize 250 times improvement of communication bandwidth, the communication delay is only 1% of the prior art, and the communication data error rate is almost not limited by the number of mounted devices in a vehicle.

[0066] The above-described specific embodiments further illustrate the technical problems solved by the present application, technical solutions and beneficial effects, and it should be understood that the above-described is only a specific embodiment of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A communication networking method of a new type of automobile vehicle communication and power supply integrated device, characterized in that, It comprises: Step S1, a plurality of subsystems cooperated with each other form a UDP multicast, and each subsystem in the UDP multicast has a heartbeat module, a sending module and a receiving module according to the service requirement; Step S2, the Ethernet gateway module monitors the heartbeat data of each subsystem and establishes the corresponding file data with the subsystem, when the heartbeat data of the subsystem is sent abnormally, it is determined that the subsystem is in a dead state, and the Ethernet gateway module is restarted by the POE function to power off the subsystem in the dead state; Step S3, the Ethernet gateway module monitors the sleep command of the vehicle body BCM system, and closes the power supply of the corresponding subsystem according to the sleep command of the vehicle body BCM system; Step S4, the Ethernet gateway module monitors the data command of the vehicle body BCM system, and judges the target subsystem sleep command sent by the vehicle body BCM system, and automatically opens the related subsystem by the Ethernet gateway module; The new vehicle communication and power supply integrated device comprises vehicle subsystems, subsystem wire harnesses, an Ethernet gateway module and a vehicle power supply; Each vehicle subsystem is connected to the Ethernet gateway module through a subsystem wire harness, and the Ethernet gateway module is connected to the vehicle body BCM system; The vehicle power supply supplies power to each vehicle subsystem through the subsystem wire harness, and supplies power to the Ethernet gateway module and the vehicle body BCM system through the power supply line.

2. The communication networking method of the new vehicle communication and power supply integrated device according to claim 1, wherein: The format of the heartbeat data is: Heartbeat ID + function ID; The format of the sleep command and data command is: Command ID area + function ID area + command content length area + command content area; Wherein, the function ID is used for sleep and wake-up, dynamic reduction of UDP multicast.

3. The communication networking method of the new type of automobile communication and power supply integrated device for whole vehicle according to claim 1, characterized in that: The vehicle subsystems comprise an air conditioning system, a remote monitoring system, an engine controller, a motor controller, a variable box controller, a vehicle body stability system, a battery management system, a power management system, a power converter, a door lock system, a seat system, a fault diagnosis system, an intelligent instrument, an adaptive cruise system, an automatic sunroof system and an electronic power steering system.

4. The communication networking method of the new type of automobile communication and power supply integrated device for whole vehicle according to claim 3, characterized in that: The Ethernet gateway module comprises a first Ethernet gateway and a second Ethernet gateway, and the first Ethernet gateway and the second Ethernet gateway are connected to the vehicle body BCM system through optical fibers.

5. The communication networking method of the new type of automobile communication and power supply integrated device of the whole vehicle according to claim 4, characterized in that: The vehicle body stability system, the variable box controller, the motor controller, the engine controller, the remote monitoring system and the air conditioning system are connected to the first Ethernet gateway through subsystem wire harnesses, and the vehicle body stability system, the variable box controller, the motor controller, the engine controller, the remote monitoring system and the air conditioning system form a UDP multicast.

6. The communication networking method of the new type of automobile communication and power supply integrated device of the whole vehicle according to claim 4, characterized in that: The electronic power steering system, the automatic sunroof system, the adaptive cruise system, the intelligent instrument and the fault diagnosis system are connected to the first Ethernet gateway through subsystem wire harnesses, and the electronic power steering system, the automatic sunroof system, the adaptive cruise system, the intelligent instrument and the fault diagnosis system form a UDP multicast.

7. The communication networking method of the new type of automobile communication and power supply integrated device of the whole vehicle according to claim 4, characterized in that: The seat system, the door lock system, the power converter, the power management system and the battery management system are connected with the second Ethernet gateway through a subsystem wire harness respectively, and the seat system, the door lock system, the power converter, the power management system and the battery management system form a UDP multicast group.

8. The communication networking method of the new type of automobile communication and power supply integrated device of the whole vehicle according to claim 1, characterized in that: The wire harness shell is internally provided with a positive power supply wire, a negative power supply wire and a signal twisted pair wire, and the signal twisted pair wire is externally provided with a shielding layer.

9. The communication networking method of the new type of automobile communication and power supply integrated device of the whole vehicle according to claim 8, characterized in that: The signal twisted pair wire is provided with four pairs, and the shielding layer is arranged on the outer periphery of the four pairs of signal twisted pair wires.

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