CN115086151B - Communication system, communication method, vehicle body controller and storage medium - Google Patents

Abstract

The application relates to a communication system, a communication method, a vehicle body controller and a storage medium. Wherein the communication system comprises: the target controller is used for carrying out data interaction with other devices through the first network segment; a body controller for forwarding communication data of the target controller to other devices; one end of the vehicle body controller is connected with the target controller through a first network segment, and the other end of the vehicle body controller is connected with other devices through a second network segment. By applying the communication system provided by the application, the influence caused by the failure of the low-voltage wire harness of the important controller in the automobile can be improved.

Description

Communication system, communication method, vehicle body controller and storage medium

Technical Field

The present disclosure relates to the field of automotive automation control technologies, and in particular, to a communication system, a communication method, a vehicle body controller, and a storage medium.

Background

With the development of automatic control technology, automobiles are being fully covered with various controllers. The controllers ensure the efficient operation of the automobile on one hand and determine whether the automobile can normally operate on the other hand. Especially critical controllers in automobiles such as whole car controllers (Vehicle control unit, VCU), battery management systems (Battery Management System, BMS) and the like, and once the controllers fail, the automobile can have serious faults such as whole car power degradation, power interruption and the like.

Through practical research, the reasons for the faults are mostly caused by the failure of the low-voltage wiring harness of the controller. When the low voltage wiring harness fails, the controller will interrupt data interaction with other devices, resulting in the occurrence of the above-described failure.

In this regard, the low voltage harness layout design of the controller can be optimized to reduce the possibility of failure of the low voltage harness of the critical controller, thereby reducing the serious impact caused by the failure of the low voltage harness of the critical controller. However, this method is not universal and is time-consuming and laborious.

Disclosure of Invention

Based on this, a communication system, a communication method, a vehicle body controller, and a storage medium are provided, which reduce the serious influence caused by the low-voltage harness failure of an important controller.

In a first aspect, the present application provides a communication system comprising: the target controller is used for carrying out data interaction with other devices through the first network segment; a body controller for forwarding communication data of the target controller to other devices; one end of the vehicle body controller is connected with other devices through a first network segment, and the other end of the vehicle body controller is connected with the target controller through a second network segment.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the target controller includes a vehicle controller or a battery management system, the first network segment includes a power network segment, and the second network segment includes a chassis network segment; one end of a first interface unit of the vehicle body controller is connected with other devices through a power network section, and the other end of the first interface unit of the vehicle body controller is connected with the whole vehicle controller or the battery management system through a chassis network section.

With reference to the first aspect, in a second possible implementation manner of the first aspect, the target controller includes an overall vehicle controller, the first network segment includes a chassis network segment, and the second network segment includes a first redundant network segment; one end of a second interface unit of the vehicle body controller is connected with other devices through a chassis network segment, and the other end of the second interface unit of the vehicle body controller is connected with the whole vehicle controller through a first redundant network segment.

With reference to the first aspect, in a third possible implementation manner of the first aspect, the target controller includes an electric power steering system or an integrated electric brake system, the first network segment includes a chassis network segment, and the second network segment includes a second redundant network segment; one end of a second interface unit of the vehicle body controller is connected with other devices through a chassis network segment, and the other end of the second interface unit of the vehicle body controller is connected with the electric power steering system or the integrated electric braking system through a second redundant network segment.

With reference to the first aspect, in a fourth possible implementation manner of the first aspect, the vehicle body controller and/or the target controller respectively includes at least two lines connected to the auxiliary power supply device, wherein the at least two lines connected to the power supply device are in a parallel state.

In a second aspect, the present application also provides a communication method applied to the vehicle body controller as described in the first aspect or any one of the first aspects. The communication method comprises the following steps: receiving a network segment switching zone bit, wherein the network segment switching zone bit is used for indicating that a target controller drops from a first network segment connected with other devices; under the condition that the network segment switching zone bit is received, switching the communication network segment of the target controller and other devices from the first network segment to the second network segment; and forwarding communication data between the target controller and other devices through the second network segment.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the step of forwarding, through the second network segment, communication data between the target controller and the other device includes: under the condition that communication data of the target controller are received through the second network segment, the communication data of the target controller are sent to other devices through the first network segment; and sending the communication data of the other devices to the target controller through the second network segment under the condition that the communication data of the other devices are received through the first network segment.

In a third aspect, the present application also provides a vehicle body controller, including: the receiving unit is used for receiving a network segment switching zone bit, wherein the network segment switching zone bit is used for indicating that a target controller drops from a first network segment connected with other devices; the switching unit is used for switching the communication network segment of the target controller and other devices from the first network segment to the second network segment under the condition that the network segment switching zone bit is received; and the forwarding unit is used for forwarding the communication data between the target controller and other devices through the second network segment.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the forwarding unit is specifically configured to: under the condition that communication data of the target controller are received through the second network segment, the communication data of the target controller are sent to other devices through the first network segment; and sending the communication data of the other devices to the target controller through the second network segment under the condition that the communication data of the other devices are received through the first network segment.

In a fourth aspect, the present application further provides a vehicle body controller, the vehicle body controller including a processor and a memory, the processor and the memory being connected by a bus; a processor for executing a plurality of instructions; a transceiver for exchanging data with other devices; a memory for storing a plurality of instructions adapted to be loaded by a processor and to carry out the communication method as in the second aspect or any of the embodiments of the second aspect.

In a fifth aspect, the present application also provides a computer readable storage medium having stored therein a plurality of instructions adapted to be loaded by a processor and to perform a communication method as in the second aspect or any one of the embodiments of the second aspect.

In summary, in the communication system provided in the present application, the target controller is connected to other devices through the first network segment, and meanwhile, the target controller is further connected to the vehicle body controller through the second network segment, so that when the target controller is disconnected from the first network segment, that is, when the low voltage cable harness of the target controller fails, the vehicle body controller may obtain the communication data of the target controller through the second network segment, and send the communication data of the target controller to the other devices through the first network segment, or the vehicle body controller may obtain the communication data of the other devices through the first network segment, and send the communication data of the other devices to the target controller through the second network segment, so as to complete the forwarding process. It can be seen that the present application reduces the serious impact of a low voltage harness failure of an important controller by adding redundant wiring between the target controller and the body controller.

Drawings

FIG. 1 is a diagram of an application environment of a communication system in one embodiment;

FIG. 2 is a block diagram of a communication system in one embodiment;

FIG. 3 is a block diagram of a communication system in another embodiment;

FIG. 4 is a block diagram of a communication system in another embodiment;

FIG. 5 is a block diagram of a communication system in another embodiment;

FIG. 6 is a block diagram of a communication system in another embodiment;

FIG. 7 is a flow diagram of a communication method in one embodiment;

FIG. 8 is a schematic block diagram of a vehicle body controller provided herein;

fig. 9 is a block diagram of a vehicle body controller according to the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

Since the embodiments of the present application relate to a large number of terms, for ease of understanding, the following description will first discuss related terms and concepts that may be related to the embodiments of the present application.

1. Vehicle body controller (Body Control Module, BCM)

The body controller is also called a body computer (ECU), which is an electronic control unit (Electronic Control Unit) for controlling an electric system of a vehicle body, and is one of important components of an automobile. The vehicle body controller can be connected with other vehicle-mounted ECUs through buses, and can control power windows, power rearview mirrors, air conditioners, anti-theft locks, lamps and the like. The vehicle body controller has the advantages of high integration level, stable operation, convenient expansion of interfaces and the like. It should be noted that, the vehicle body controller may implement the method described in the present application that may be applied to the vehicle body controller, for example, the communication data of the target controller may be forwarded to other devices, or the communication data of other devices may be forwarded to the target controller, which is not described herein.

2. Whole vehicle controller (Vehicle control unit VCU)

The whole vehicle controller is a central control unit of the automobile and is a core of the whole control system. The whole vehicle controller is responsible for normal running of the automobile, braking energy feedback, energy management of a whole vehicle driving system and a power battery, network management, fault diagnosis and treatment, vehicle state monitoring and the like, so that the normal and stable operation of the whole vehicle under the conditions of better dynamic property, higher economy and reliability is ensured. The performance of the whole automobile controller directly determines the performance of the whole automobile, and plays a role of a medium-current whetspost.

3. Battery management system (Battery Management System BMS)

The battery management system can intelligently manage and maintain each battery unit, prevent the battery from being overcharged and overdischarged, prolong the service life of the battery and monitor the state of the battery. Since battery safety relates to whether a new energy automobile can normally operate, a battery management system is an important device of the automobile.

4. Electric power steering system (Electric Power Steering EPS)

An electric power steering system refers to a power steering system that relies on an electric motor to provide assist torque. The system directly provides steering assistance by the electric booster, and omits a power steering oil pump, a hose, hydraulic oil, a conveyor belt and a belt pulley arranged on an engine which are necessary for a hydraulic power steering system, thereby saving energy and protecting the environment.

5. Integrated electric brake system (Integrated Power Brake, IPB)

The integrated electric braking system is an electrically controlled braking system, has quick response and accurate control, and can obviously increase the efficiency of forced energy recovery when the integrated electric braking system is combined with a new energy vehicle.

It should be noted that, the illustrations provided in the present embodiment merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complex. The structures, proportions, sizes, etc. shown in the drawings attached hereto are for illustration purposes only and are not intended to limit the scope of the invention, which is defined by the claims, but rather by the claims. Meanwhile, references in the specification to directions or positional relationships such as "upper", "lower", "left", "right", "middle", "longitudinal", "transverse", "horizontal", "inner", "outer", "radial", "circumferential", etc., are based on the directions or positional relationships shown in the drawings, are also for convenience of description only, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and change or adjustment of the relative relationship thereof without substantial change of technical content, but are also regarded as the scope of the invention that can be implemented. And therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

It should be further noted that the communication system to which the present application refers next is used in a communication system formed by various control devices on an automobile, and the target controller and other devices may also be various control devices, where the various control devices may include, but are not limited to, a body controller, a vehicle controller, a battery management system, an electric power steering system, an integrated electric brake system, an electronic control unit (Electronic Control Unit, ECU), a central processing unit (central processing unit, CPU), and the like, a general purpose processor, a coprocessor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (application-specific integrated circuit, ASIC), a field programmable gate array (field programmable gate array, FPGA), other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The control devices CAN communicate according to a controller area network (Controller Area Network, CAN) communication protocol, wherein the controller area network is a serial communication network capable of effectively supporting distributed control and real-time control.

At present, in order to improve the problem of low-voltage harness failure of a controller, the possibility of occurrence of the low-voltage harness failure condition of an important controller can be reduced by optimizing the layout design of the low-voltage harness of the controller, so that the serious influence caused by the low-voltage harness failure of the important controller is reduced. However, this method is not universal and is time-consuming and laborious.

In this regard, the application provides a communication system applied to an automobile, and the communication system improves the problem of low-voltage wire harness failure of a controller by adopting a wire harness redundancy scheme, so that the occurrence of serious faults such as power degradation, power interruption and the like of the whole automobile is reduced. Specifically, the communication system provided by the application comprises a target controller for performing data interaction with other devices through a first network segment; a body controller for forwarding communication data of the target controller to other devices; one end of the vehicle body controller is connected with other devices through a first network segment, and the other end of the vehicle body controller is connected with the target controller through a second network segment.

It should be noted that, in the case of the target controller being disconnected, the application may choose to forward the communication data of the target controller by using the vehicle body controller, because the vehicle body controller includes but is not limited to the following advantages: 1. the system has strong and stable functions, the vehicle body control system is advanced and complex compared with the common system, has very strong functions, and has the characteristics of safety and stability in the operation process; 2. the interfaces are multiple, and the vehicle body controller is required to be connected with various vehicle body electrical equipment, so that a plurality of control interfaces and detection interfaces are reserved at the beginning of design, a plurality of network segments can be connected in the application, and the requirement of line redundancy is met. Therefore, the vehicle body controller has the advantages that the communication system provided by the application can stably run, has few faults and can be conveniently realized on the original vehicle structure, and the controller in the vehicle and the vehicle body controller are correspondingly connected only according to the structure of the communication system provided by the application.

It should be noted that, based on the description of the above solution, it can be seen that one end of the target controller is connected to the other devices through the first network segment, the other end of the target controller is connected to the vehicle body controller through the second network segment, and the vehicle body controller is further connected to the first network segment, so that the target controller may directly communicate with the other devices through the first network segment, may indirectly communicate with the other devices through the second network segment, the vehicle body controller and the first network segment, may directly communicate with the first network segment before the target controller is disconnected from the first network segment, may indirectly communicate with the second network segment after the target controller is disconnected from the first network segment, and may also be regarded as that the target controller is connected to the other devices through the second network segment. It can be seen that the second network segment can be used as a substitute for the first network segment, that is, the second network segment is a redundant line of the first network segment, so that line redundancy between the target controller and other devices can be realized, and serious influence caused by low-voltage line failure of the important controller is reduced.

For a better understanding of the communication system proposed in the present application, the present application will be described in detail below with reference to an application environment diagram of the communication system in fig. 1, and a structural block diagram of the communication system shown in fig. 2.

As shown in fig. 2, the communication system of the present application includes a vehicle body controller, a target controller, and other devices, where one end of the vehicle body controller, the target controller, and the other end of the other devices are connected through a first network segment, and the other ends of the vehicle body controller and the target controller are connected through a second network segment. It will be appreciated that in a general communication system, in order to achieve communication between the target controller and other devices, the target controller and other devices need only be connected to the first network segment through a low-voltage wire harness, so that the target controller and other devices can be connected through the first network segment. But when the target control device drops from the first network segment, the target controller cannot communicate with other devices. In this regard, the application also accesses the vehicle body controller to the first network segment, and accesses the vehicle body controller and the target controller to the second network segment, so that when the target controller is disconnected from the first network segment, the communication data of the target controller can be forwarded to other devices through the second network segment, and the communication data of other devices are forwarded to the target controller, so that the target controller can still keep communicating with other devices even after the target controller is disconnected from the first network segment. Therefore, the problem of low-voltage harness failure of the controller can be improved by only adding redundant circuits on the vehicle body controller and the target controller because the vehicle body controller is an original device in the vehicle, so that the occurrence of serious faults such as power degradation, power interruption and the like of the whole vehicle is reduced.

More specifically, as shown in fig. 1, when the target control device is disconnected from the first network segment, that is, when the low-voltage harness for connecting the target controller to the first network segment fails, the target controller sends the network segment switching flag bit to the vehicle body controller through the second network segment, or other devices send the network segment switching flag bit to the vehicle body controller through the first network segment. After receiving the network segment switching flag bit, the vehicle body controller switches the communication network segment of the target controller and other devices from the first network segment to the second network segment. After the communication network segment is switched, the vehicle body controller forwards communication data between the target controller and other devices through the second network segment. Specifically, the forwarding includes: under the condition that communication data of the target controller are received through the second network segment, the communication data of the target controller are sent to other devices through the first network segment; and sending the communication data of the other devices to the target controller through the second network segment under the condition that the communication data of the other devices are received through the first network segment.

Next, for a better understanding of the communication system described herein, several more specific embodiments will be presented herein in connection with the communication systems shown in fig. 3-6. It should be noted that fig. 3-6 are specific embodiments consistent with the configuration of the communication system shown in fig. 2, where the communication system shown in fig. 6 is the sum of the communication systems shown in fig. 3, 4 and 5, and is a more specific example of the communication system shown in fig. 3-5. In addition, in order to better embody the distinction and association of several communication systems, the portions actually included in each communication system are enclosed by a dashed frame, and thus the communication systems of fig. 3, 4 and 5 are actually bolded and darkened portions within the dashed frames thereof.

In another embodiment, as shown in fig. 3, the target controller in the communication system includes a vehicle controller or a battery management system, the first network segment includes a power network segment, and the second network segment includes a chassis network segment; one end of a first interface unit of the vehicle body controller is connected with other devices through a power network section, and the other end of the first interface unit of the vehicle body controller is connected with the whole vehicle controller or the battery management system through a chassis network section. Wherein, in the case that the target controller is a whole vehicle controller, the other devices are battery management systems; in the case that the target controller is a battery management system, the other devices are vehicle controllers.

Based on the communication system described in the above embodiment, when the whole vehicle controller (or the battery management system) is disconnected from the power network segment, that is, when the wire harness used by the whole vehicle controller to access to the power network segment fails, the first interface unit of the vehicle body controller receives the first network segment switching flag bit sent by the whole vehicle controller or the battery management system, and the first network segment switching flag bit is used for indicating that the whole vehicle controller is disconnected from the power network segment, so that after receiving the first network segment switching flag bit, the first interface unit of the vehicle body controller switches the communication network segment between the whole vehicle controller and the battery management system from the power network segment to the chassis network segment, and forwards communication data between the whole vehicle controller and the battery management system through the chassis network segment, that is, when the communication data of the whole vehicle controller (or the battery management system) is received through the chassis network segment, the communication data of the whole vehicle controller is sent to the battery management system (or the whole vehicle controller) through the power network segment, and when the communication data of the battery management system (or the whole vehicle controller) is received through the power network segment, the communication data of the whole vehicle controller is sent to the chassis management system through the chassis network segment.

Therefore, under the condition that the whole vehicle controller (or the battery management system) is disconnected from the power network section, the chassis network section in the communication system in the application can be used as a redundant network section of the power network section, so that the first interface unit of the vehicle body controller can forward communication data for the whole vehicle controller (or the battery management system) disconnected from the power network section, the influence caused by low-voltage wire harness failure of an important controller in an automobile is improved, the occurrence of serious faults such as whole vehicle power degradation, even power interruption and the like of the automobile is reduced.

In another embodiment, as shown in fig. 4, the target controller in the communication system comprises a vehicle controller, the first network segment comprises a chassis network segment, and the second network segment comprises a first redundant network segment; one end of a second interface unit of the vehicle body controller is connected with other devices through a chassis network segment, and the other end of the second interface unit of the vehicle body controller is connected with the whole vehicle controller through a first redundant network segment. The other devices are an electric power steering system and an integrated electric braking system.

Based on the communication system described in the above embodiment, when the whole vehicle controller is disconnected from the chassis network segment, that is, when the wire harness for accessing the chassis network segment fails, the second interface unit of the vehicle body controller receives the second network segment switching flag bit sent by the whole vehicle controller, the electric power steering system or the integrated electric brake system, and the second network segment switching flag bit is used for indicating that the whole vehicle controller is disconnected from the chassis network segment, so that after receiving the second network segment switching flag bit, the second interface unit of the vehicle body controller switches the communication network segment between the whole vehicle controller and the electric power steering system and the integrated electric brake system from the chassis network segment to the first redundant network segment, and forwards communication data between the whole vehicle controller and the battery management system through the chassis network segment, that is, when the communication data of the whole vehicle controller is received through the first redundant network segment, the communication data of the whole vehicle controller is sent to the electric power steering system or the integrated electric brake system through the chassis network segment, and when the communication data of the electric power steering system or the integrated electric brake system is received through the chassis network segment, the communication data of the whole vehicle controller is sent through the first redundant network segment.

Therefore, under the condition that the whole vehicle controller is disconnected from the chassis network segment, the first redundant network segment in the communication system can be used as the redundant network segment of the chassis network segment, so that the second interface unit of the vehicle body controller can forward communication data for the whole vehicle controller disconnected from the chassis network segment, the influence caused by the failure of the low-voltage wire harness of the important controller in the vehicle is improved, and the occurrence of serious faults such as power degradation, power interruption and the like of the whole vehicle is further reduced.

In another possible embodiment, as shown in fig. 5, the target controller in the communication system comprises an electric power steering system or an integrated electric brake system, the first network segment comprises a chassis network segment, and the second network segment comprises a second redundant network segment; one end of a second interface unit of the vehicle body controller is connected with other devices through a chassis network segment, and the other end of the second interface unit of the vehicle body controller is connected with the electric power steering system or the integrated electric braking system through a second redundant network segment. Wherein, in the case that the target controller is an electric power steering system, the other devices are integrated electric brake systems; in the case where the target controller is an integrated electric brake system, the aforementioned other device is an electric power steering system.

Based on the communication system described in the above embodiment, in the case that the electric power steering system (or the integrated electric brake system) is disconnected from the chassis network segment, that is, the wire harness for connecting to the chassis network segment fails, the second interface unit of the vehicle body controller receives the third network segment switching flag bit sent by the whole vehicle controller, the electric power steering system or the integrated electric brake system, and the third network segment switching flag bit is used for indicating that the electric power steering system (or the integrated electric brake system) is disconnected from the chassis network segment, so that the second interface unit of the vehicle body controller switches the communication network segment of the electric power steering system and the integrated electric brake system from the chassis network segment to the second redundant network segment after receiving the third network segment switching flag bit, and forwards communication data between the whole vehicle controller and the battery management system through the second redundant network segment, that is, in the case that communication data of the electric power steering system (or the integrated electric brake system) is received through the second redundant network segment, the communication data of the electric power steering system (or the integrated electric brake system) is sent through the chassis network segment to the integrated electric power steering system (or the integrated electric brake system).

Therefore, under the condition that the electric power steering system or the integrated electric brake system is disconnected from the chassis network segment, the second redundant network segment in the communication system can be used as the redundant network segment of the chassis network segment, so that the second interface unit of the vehicle body controller can forward communication data for the electric power steering system or the integrated electric brake system disconnected from the chassis network segment, the influence caused by low-voltage wire harness failure of an important controller in the vehicle is improved, and the occurrence of serious faults such as power degradation, even power interruption and the like of the whole vehicle is further reduced.

In another embodiment, as shown in fig. 6, the present application proposes a more specific communication system comprising:

the system comprises a whole vehicle controller, a battery management system, an electric power steering and an integrated electric brake, wherein the whole vehicle controller is connected with the battery management system through a power network segment, the whole vehicle controller is connected with the battery management system through a chassis network segment, and the electric power steering system, the integrated electric brake system and the whole vehicle controller are connected with the battery management system through the chassis network segment;

the system comprises a first interface unit of a vehicle body controller, a power network section, a battery management system, a chassis network section, an integrated electric brake system, a vehicle controller and a battery management system, wherein one end of the first interface unit of the vehicle body controller is connected with the vehicle body controller and the battery management system through the power network section;

The second interface unit is used for forwarding communication data, wherein a first port of the second interface unit of the vehicle body controller is connected with the whole vehicle controller through a first redundant network segment, a second port of the second interface unit of the vehicle body controller is connected with the electric power steering system, the integrated electric braking system, the whole vehicle controller and the battery management system through a chassis network segment, and a third port of the second interface unit of the vehicle body controller is connected with the electric power steering system and the integrated electric braking system through a second redundant network segment.

In this embodiment of the present application, based on the above-described communication system, when an important controller such as a vehicle controller, a battery management system, an electric power steering system, an integrated electric brake system, or the like is disconnected from a connected network segment, the vehicle body controller may forward communication data on the disconnected network segment to the important controller through another network segment connected to the important controller. It should be noted that, the vehicle body controller may include at least one or more interface units, and in this embodiment of the present application, the vehicle body controller includes two interface units (i.e., a first interface unit and a second interface unit) as an example, it may be understood that, in order to implement the technical solution described in the present application, the first interface unit and the second interface unit may be any two of multiple interfaces of the vehicle body controller, which is not described herein in detail.

Optionally, the application further proposes a communication system based on any one of the foregoing embodiments and optional manners. In the communication system, the vehicle body controller and/or the target controller respectively comprise at least two lines connected with the auxiliary power supply device, wherein the at least two lines connected with the power supply device are in a parallel state.

In this alternative, since the critical controller (including the body controller and/or the target controller) includes at least two lines connected to the auxiliary power supply device, respectively, the stand-alone power stop is not caused even if the critical controller is disconnected from the main power supply in the automobile. And because the at least two circuits connected with the auxiliary power supply device are in a parallel state, any one of the circuits is disconnected, and the auxiliary power supply device is not influenced to supply power for the important controller, so that the wire harness redundancy can be further improved and the influence caused by the failure of the low-voltage wire harness of the important controller in the automobile can be improved by implementing the alternative mode.

In summary, in the communication system provided in the present application, the target controller is connected to other devices through the first network segment, and meanwhile, the target controller is further connected to the vehicle body controller through the second network segment, so that when the target controller is disconnected from the first network segment, that is, when the low voltage cable harness of the target controller fails, the vehicle body controller may obtain the communication data of the target controller through the second network segment, and send the communication data of the target controller to the other devices through the first network segment, or the vehicle body controller may obtain the communication data of the other devices through the first network segment, and send the communication data of the other devices to the target controller through the second network segment, so as to complete the forwarding process. It can be seen that the present application reduces the serious impact of a low voltage harness failure of an important controller by adding redundant wiring between the target controller and the body controller.

Based on the above embodiments, the present application proposes a communication method applied to a communication system as shown in fig. 2. The following will take the execution body as an example of the vehicle body controller, and describe the communication method in more detail with reference to the flowchart of fig. 7. Specific:

701: and receiving the network segment switching zone bit.

The network segment switching flag bit is used for indicating that the target controller is disconnected from the first network segment connected with other devices, and can be sent by the target control device or sent by other devices connected to the first network segment, and the network segment switching flag bit comprises at least one bit of data in N system, for example, the network segment switching flag bit is one bit of data in two-level system, namely 1. The target controller includes, but is not limited to, a vehicle controller, a battery management system, electric power steering, integrated electric braking and the like, and the other devices include, but are not limited to, a vehicle controller, a battery management system, electric power steering, integrated electric braking and the like.

702: and under the condition that the network segment switching zone bit is received, switching the communication network segment of the target controller and other devices from the first network segment to the second network segment.

After receiving the network segment switching flag bit, the vehicle body controller switches the communication network segment of the target controller and other devices from the first network segment to the second network segment, namely, after the target controller is disconnected from the first network segment, a communication bridge between the target controller and other devices is set up again through the second network segment.

More specifically, before the target controller drops from the first network segment, the target controller communicates with other devices through the first network segment, and at this time, the forwarding function of the vehicle body controller is in a forbidden state, and the forwarding function of the vehicle body controller does not forward the communication data of the target controller and other devices even if the vehicle body controller receives the communication data of the target controller and other devices; after the target controller is disconnected from the first network segment, the vehicle body controller receives the network segment switching zone bit, and after the communication network segment of the target controller and other devices is switched from the first network segment to the second network segment, the target controller and the other devices are communicated through the second network segment, the vehicle body controller and the communication line of the first network segment, at the moment, the forwarding function of the vehicle body controller is in an allowed state, and when the vehicle body controller receives the communication data of the target controller and the other devices, the data are forwarded.

It should be noted that, before the network segment is switched, the target controller directly communicates with other devices through the first network segment, and after the network segment is switched, the target controller indirectly communicates with other devices through the second network segment, so that the vehicle body controller can be understood as switching the communication network segment between the target controller and other devices from the first network segment to the second network segment, but it should be noted that, before the switching, the communication line between the target controller and other devices is the first network segment, and after the switching, the communication line between the target controller and other devices is the second network segment, the vehicle body controller and the first network segment, which will not be repeated.

703: and forwarding communication data between the target controller and other devices through the second network segment.

The forwarding of the communication data between the target controller and other devices through the second network segment refers to sending the communication data of the target controller to the other devices through the first network segment when the communication data of the target controller is received through the second network segment; and sending the communication data of the other devices to the target controller through the second network segment under the condition that the communication data of the other devices are received through the first network segment.

In another embodiment, a first interface unit of the vehicle body controller receives a first network segment switching flag bit, wherein the first network segment switching flag bit is used for indicating that the vehicle body controller or the battery management system is disconnected from a power network segment connected with other devices; under the condition that a first network segment switching zone bit is received, switching a communication network segment of a whole vehicle controller or a battery management system and other devices from a power network segment to a chassis network segment; and forwarding communication data between the whole vehicle controller or the battery management system and other devices through the chassis network segment.

The communication method of the above alternative mode is applied to the first interface unit of the vehicle body controller in the communication system shown in fig. 3. Specifically, the target controller in the communication system comprises a whole vehicle controller or a battery management system, the first network section comprises a power network section, and the second network section comprises a chassis network section; one end of a first interface unit of the vehicle body controller is connected with other devices through a power network section, and the other end of the first interface unit of the vehicle body controller is connected with the whole vehicle controller or the battery management system through a chassis network section. Wherein, in the case that the target controller is an electric power steering system, the other devices are integrated electric brake systems; in the case where the target controller is an integrated electric brake system, the aforementioned other device is an electric power steering system.

In another implementation manner, a second interface unit of the vehicle body controller receives a second network segment switching flag bit, wherein the second network segment switching flag bit is used for indicating that the whole vehicle controller is disconnected from a chassis network segment connected with other devices; under the condition that the second network segment switching zone bit is received, switching the communication network segments of the whole vehicle controller and other devices from the chassis network segment to the first redundant network segment; and forwarding communication data between the whole vehicle controller and other devices through the first chassis redundancy network segment.

The communication method of the above alternative mode is applied to the second interface unit of the body controller of the communication system shown in fig. 4. Specifically, the target controller in the communication system comprises a whole vehicle controller, the first network segment comprises a chassis network segment, and the second network segment comprises a first redundant network segment; one end of a second interface unit of the vehicle body controller is connected with other devices through a chassis network segment, and the other end of the second interface unit of the vehicle body controller is connected with the whole vehicle controller through a first redundant network segment. The other devices are an electric power steering system and an integrated electric braking system.

In another embodiment, the second interface unit of the vehicle body controller receives a third network segment switching flag bit, wherein the third network segment switching flag bit is used for indicating that the electric power steering system or the integrated electric brake system is disconnected from the chassis network segment connected with other devices; under the condition that a third network segment switching zone bit is received, switching a communication network segment of the electric power steering system or the integrated electric braking system and other devices from a chassis network segment to a second redundant network segment; and forwarding communication data between the electric power steering system or the integrated electric brake system and other devices through the second chassis redundancy network segment.

The communication method of the above alternative mode is applied to the second interface unit of the body controller of the communication system shown in fig. 5. Specifically, the target controller in the communication system comprises an electric power steering system or an integrated electric braking system, the first network segment comprises a chassis network segment, and the second network segment comprises a second redundant network segment; one end of a second interface unit of the vehicle body controller is connected with other devices through a chassis network segment, and the other end of the second interface unit of the vehicle body controller is connected with the electric power steering system or the integrated electric braking system through a second redundant network segment. Wherein, in the case that the target controller is an electric power steering system, the other devices are integrated electric brake systems; at the target control

In another embodiment, the first interface unit of the vehicle body controller or the second interface unit of the vehicle body controller receives a network segment switching flag bit, wherein the network segment switching flag bit comprises a first network segment switching flag bit, a second network segment switching flag bit and a third network segment switching flag bit, the first network segment switching flag bit is used for indicating that the whole vehicle controller or the battery management system is disconnected from a power network segment connected with other devices, the second network segment switching flag bit is used for indicating that the whole vehicle controller is disconnected from a chassis network segment connected with other devices, and the third network segment switching flag bit is used for indicating that the electric power steering system or the integrated electric brake system is disconnected from the chassis network segment connected with other devices; under the condition that a first interface unit of the vehicle body controller receives a first network segment switching zone bit, switching a communication network segment of the whole vehicle controller or the battery management system and other devices from a power network segment to a chassis network segment, and forwarding communication data between the whole vehicle controller or the battery management system and other devices through the chassis network segment; under the condition that a second interface unit of the vehicle body controller receives a second network segment switching zone bit, switching a communication network segment of the vehicle body controller and other devices from a chassis network segment to a first redundant network segment, and forwarding communication data between the vehicle body controller and other devices through the first chassis redundant network segment; and the second interface unit of the vehicle body controller switches the communication network segment of the electric power steering system or the integrated electric braking system and other devices from the chassis network segment to a second redundant network segment under the condition that the third network segment switching zone bit is received, and forwards communication data between the electric power steering system or the integrated electric braking system and other devices through the second chassis redundant network segment.

The communication method of the above alternative mode is applied to the communication system shown in fig. 6. Specifically, the communication system includes: the system comprises a whole vehicle controller, a battery management system, an electric power steering and an integrated electric brake, wherein the whole vehicle controller is connected with the battery management system through a power network segment, the whole vehicle controller is connected with the battery management system through a chassis network segment, and the electric power steering system, the integrated electric brake system and the whole vehicle controller are connected with the battery management system through the chassis network segment; the system comprises a first interface unit of a vehicle body controller, a power network section, a battery management system, a chassis network section, an integrated electric brake system, a vehicle controller and a battery management system, wherein one end of the first interface unit of the vehicle body controller is connected with the vehicle body controller and the battery management system through the power network section; the second interface unit is used for forwarding communication data, wherein a first port of the second interface unit of the vehicle body controller is connected with the whole vehicle controller through a first redundant network segment, a second port of the second interface unit of the vehicle body controller is connected with the electric power steering system, the integrated electric braking system, the whole vehicle controller and the battery management system through a chassis network segment, and a third port of the second interface unit of the vehicle body controller is connected with the electric power steering system and the integrated electric braking system through a second redundant network segment.

In summary, the vehicle body controller determines that the target controller drops from the first network segment through the received network segment switching zone bit, the target controller cannot communicate with other devices connected to the first network segment, at this time, the vehicle body controller switches the communication network segment of the target controller and the other devices from the first network segment to the second network segment, and forwards communication data between the target controller and the other devices through the second network segment. Therefore, when the target controller is disconnected from the first network segment, the vehicle body controller forwards the communication data on the first network segment to the target controller through the second network segment, so that the serious influence caused by the low-voltage line failure of the important controller is reduced.

Referring to fig. 8, the implementation of the present invention also provides a vehicle body controller. The embodiment of the invention can divide the functional units of the device according to the method example, for example, each functional unit can be divided corresponding to each function, and two or more functions can be integrated in one unit. The integrated units may be implemented in hardware or in software functional units. It should be noted that, in the embodiment of the present invention, the division of the units is schematic, which is merely a logic function division, and other division manners may be implemented in actual practice. As shown in fig. 8, the vehicle body controller includes a receiving unit 810, a switching unit 820, and a forwarding unit 830, specifically:

A receiving unit 810, configured to receive a network segment switching flag bit, where the network segment switching flag bit is used to indicate that a target controller drops from a first network segment connected to another device; a switching unit 820, configured to switch a communication network segment of the target controller and other devices from a first network segment to a second network segment when receiving the network segment switch flag bit; and a forwarding unit 830, configured to forward, through the second network segment, communication data between the target controller and other devices.

Optionally, the forwarding unit 830 is specifically configured to: under the condition that communication data of the target controller are received through the second network segment, the communication data of the target controller are sent to other devices through the first network segment; and sending the communication data of the other devices to the target controller through the second network segment under the condition that the communication data of the other devices are received through the first network segment.

Optionally, the target controller includes a vehicle controller or a battery management system, the first network segment includes a power network segment, and the second network segment includes a chassis network segment.

Optionally, the target controller comprises a whole vehicle controller, the first network segment comprises a chassis network segment, and the second network segment comprises a first redundant network segment.

Optionally, the target controller comprises an electric power steering system or an integrated electric brake system, the first network segment comprises a chassis network segment, and the second network segment comprises a second redundant network segment.

Referring to fig. 9, a schematic block diagram of a vehicle body controller according to another embodiment of the present application is provided. The vehicle body controller in the present embodiment as shown in the drawings may include: a processor 910, a transceiver 920, and a memory 930. The processor 910, transceiver 920, and memory 930 are coupled by bus 940. A processor 910 for executing a plurality of instructions; a transceiver 920 for exchanging data with other devices; a memory 930 for storing a plurality of instructions adapted to be loaded by the processor 910 and to perform the method of battery detection as in the above-described embodiments.

The processor 910 may be an electronic control unit (Electronic Control Unit, ECU), a central processing unit (central processing unit, CPU), a general purpose processor, a co-processor, a digital signal processor (digital signal processor, DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (field programmable gate array, FPGA) or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. The processor 910 may also be a combination of computing functions, e.g., including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like. In this embodiment, the processor 910 may use a single-chip microcomputer, and various control functions can be realized by programming the single-chip microcomputer, for example, in this embodiment, the functions of collecting, processing and demodulating the original video and audio data are realized, and the processor has the advantages of strong computing power and rapid processing. Specific:

The transceiver 920 is configured to perform a function of the receiving unit 810, and is configured to receive a segment switch flag, where the segment switch flag is used to indicate that the target controller is disconnected from a first segment connected to another device; the processor 910 is configured to perform a function of the switching unit 820, and is configured to switch a communication network segment of the target controller and other devices from a first network segment to a second network segment when a network segment switch flag bit is received; the processor 910 is further configured to perform a function of the forwarding unit 830, and is configured to forward the communication data between the target controller and other devices through the second network segment.

Optionally, the processor 910 is specifically configured to: under the condition that communication data of the target controller are received through the second network segment, the communication data of the target controller are sent to other devices through the first network segment; and sending the communication data of the other devices to the target controller through the second network segment under the condition that the communication data of the other devices are received through the first network segment.

Optionally, the target controller includes a vehicle controller or a battery management system, the first network segment includes a power network segment, and the second network segment includes a chassis network segment.

Optionally, the target controller comprises a whole vehicle controller, the first network segment comprises a chassis network segment, and the second network segment comprises a first redundant network segment.

Optionally, the target controller comprises an electric power steering system or an integrated electric brake system, the first network segment comprises a chassis network segment, and the second network segment comprises a second redundant network segment.

The present application also provides a computer readable storage medium having stored therein a plurality of instructions adapted to be loaded by a processor and to perform the method of any of the preceding embodiments.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples represent only a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (10)

1. A communication system for use in an automobile, comprising:

the target controller is used for carrying out data interaction with other devices through the first network segment;

a body controller for forwarding the communication data of the target controller to other devices;

one end of the vehicle body controller is connected with the other devices through the first network segment, the other end of the vehicle body controller is connected with the target controller through the second network segment, one end of the first interface unit of the vehicle body controller is connected with the other devices through the power network segment, and the other end of the first interface unit of the vehicle body controller is connected with the whole vehicle controller or the battery management system through the chassis network segment; one end of a second interface unit of the vehicle body controller is connected with other devices through a chassis network segment, and the other end of the second interface unit of the vehicle body controller is connected with the whole vehicle controller through a first redundant network segment; one end of a second interface unit of the vehicle body controller is connected with other devices through a chassis network segment, and the other end of the second interface unit of the vehicle body controller is connected with an electric power steering system or an integrated electric braking system through a second redundant network segment;

the vehicle body controller is specifically configured to switch a communication network segment of the target controller and other devices from a first network segment to a second network segment after receiving the network segment switching flag bit, and forward communication data between the target controller and other devices through the second network segment, wherein the first interface unit of the vehicle body controller switches a communication network segment of the vehicle body controller and the battery management system from a power network segment to a chassis network segment after receiving the first network segment switching flag bit, and forward communication data between the vehicle body controller and the battery management system through the chassis network segment; after receiving the second network segment switching zone bit, the second interface unit of the vehicle body controller switches the communication network segment of the whole vehicle controller, the electric power steering system and the integrated electric brake system from the chassis network segment to a first redundant network segment, and forwards communication data among the whole vehicle controller, the electric power steering system and the integrated electric brake system through the first redundant network segment; and after receiving the third network segment switching zone bit, the second interface unit of the vehicle body controller switches the communication network segment of the electric power steering system and the integrated electric brake system from the chassis network segment to a second redundant network segment, and forwards communication data between the electric power steering system and the integrated electric brake system through the second redundant network segment.

2. The system according to claim 1, characterized in that it comprises:

the target controller comprises a whole vehicle controller or a battery management system, the first network section comprises a power network section, and the second network section comprises a chassis network section;

one end of a first interface unit of the vehicle body controller is connected with other devices through the power network section, and the other end of the first interface unit of the vehicle body controller is connected with the whole vehicle controller or the battery management system through the chassis network section.

3. The system according to claim 1, characterized in that it comprises:

the target controller comprises a whole vehicle controller, the first network segment comprises a chassis network segment, and the second network segment comprises a first redundant network segment;

one end of a second interface unit of the vehicle body controller is connected with other devices through the chassis network segment, and the other end of the second interface unit of the vehicle body controller is connected with the whole vehicle controller through the first redundant network segment.

4. The system according to claim 1, characterized in that it comprises:

the target controller comprises an electric power steering system or an integrated electric braking system, the first network segment comprises a chassis network segment, and the second network segment comprises a second redundant network segment;

One end of a second interface unit of the vehicle body controller is connected with other devices through the chassis network segment, and the other end of the second interface unit of the vehicle body controller is connected with the electric power steering system or the integrated electric braking system through the second redundant network segment.

5. The system according to claim 1, wherein the body controller and/or the target controller each comprises at least two lines connected to an auxiliary power supply device, wherein the at least two lines connected to the power supply device are in a parallel state.

6. A communication method applied to the vehicle body controller according to any one of claims 1 to 5, characterized by comprising:

receiving a network segment switching zone bit, wherein the network segment switching zone bit is used for indicating that a target controller drops from a first network segment connected with other devices;

under the condition that the network segment switching zone bit is received, switching the communication network segment of the target controller and the other devices from a first network segment to a second network segment, and forwarding communication data between the target controller and the other devices through the second network segment;

and under the condition that the network segment switching flag bit is received, switching the communication network segment of the target controller and the other devices from a first network segment to a second network segment, and forwarding the communication data between the target controller and the other devices through the second network segment, wherein the method comprises the following steps of:

After receiving the first network segment switching flag bit, switching the communication network segment of the whole vehicle controller and the battery management system from the power network segment to the chassis network segment, and forwarding communication data between the whole vehicle controller and the battery management system through the chassis network segment;

after receiving the second network segment switching zone bit, switching the communication network segment of the whole vehicle controller, the electric power steering system and the integrated electric brake system from the chassis network segment to a first redundant network segment, and forwarding communication data among the whole vehicle controller, the electric power steering system and the integrated electric brake system through the first redundant network segment;

and after receiving the third network segment switching flag bit, switching the communication network segment of the electric power steering system and the integrated electric brake system from the chassis network segment to a second redundant network segment, and forwarding communication data between the electric power steering system and the integrated electric brake system through the second redundant network segment.

7. The method of claim 6, wherein the step of forwarding the communication data between the target controller and the other device via the second network segment comprises:

transmitting communication data of the target controller to the other devices through the first network segment under the condition that the communication data of the target controller is received through the second network segment;

And sending the communication data of the other devices to the target controller through the second network segment under the condition that the communication data of the other devices are received through the first network segment.

8. A vehicle body controller, characterized by comprising:

the network segment switching device comprises a receiving unit and a switching unit, wherein the receiving unit is used for receiving a network segment switching zone bit, and the network segment switching zone bit is used for indicating that a target controller drops from a first network segment connected with other devices;

the switching unit is used for switching the communication network segments of the target controller and the other devices from a first network segment to a second network segment under the condition that the network segment switching zone bit is received;

a forwarding unit, configured to forward, through the second network segment, communication data between the target controller and the other device;

the switching unit is specifically configured to switch a communication network segment of the whole vehicle controller and the battery management system from a power network segment to a chassis network segment after receiving a first network segment switching flag bit; the forwarding unit is specifically used for forwarding communication data between the whole vehicle controller and the battery management system through the chassis network segment;

the switching unit is specifically configured to switch a communication network segment of the vehicle controller, the electric power steering system, and the integrated electric brake system from a chassis network segment to a first redundant network segment after receiving the second network segment switching flag bit; the forwarding unit is specifically used for forwarding communication data between the whole vehicle controller and the electric power steering system and between the whole vehicle controller and the electric power braking system through a first redundant network segment;

The switching unit is specifically configured to switch a communication network segment of the electric power steering system and the integrated electric brake system from a chassis network segment to a second redundant network segment after receiving a third network segment switching flag bit; the forwarding unit is specifically configured to forward communication data between the electric power steering system and the integrated electric brake system through the second redundant network segment.

9. The vehicle body controller is characterized by comprising a processor, a transceiver and a memory, wherein the processor, the transceiver and the memory are connected through a bus; the processor is used for executing a plurality of instructions; the transceiver is used for exchanging data with other devices; the memory for storing the plurality of instructions adapted to be loaded by the processor and to perform the communication method of any of claims 6-7.

10. A computer readable storage medium, characterized in that it has stored therein a plurality of instructions adapted to be loaded by a processor and to carry out the communication method according to any of claims 6-7.