Bus body domain control and distribution system for bus

Abstract

The invention belongs to the technical field of low-voltage power distribution and vehicle body control on commercial vehicles, and particularly discloses a vehicle body domain control and power distribution system for a bus, which comprises a domain controller, and the domain controller is composed of a power supply module, an input module, a control module, a communication module and the like. According to the invention, the problems of fuses and relays can be effectively solved, and the power distribution and control part of a whole vehicle CAN bus system can be realized: the current of each part is detected in real time while power is supplied to each part, so that load short-circuit protection, over-temperature protection, over-current configuration and protection and the like are realized; and internal parameter configuration of the modules can be realized through a CAN bus, and related information can be sent to each module, so that real-time diagnosis of the load state is realized.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage power distribution and body control technology on commercial vehicles, and in particular to a body domain control power distribution system for buses. Background Art

[0002] The vehicle's low-voltage power distribution and body control system is used to realize the functions of low-voltage power distribution from the low-voltage battery to different high- and low-voltage components, low-voltage power management, and body control.

[0003] The traditional low-voltage power distribution scheme uses relays and fuses to achieve power distribution and protect the vehicle circuit at the same time, which cannot achieve the management function of low-voltage power supply. Relays protect circuits by automatically adjusting and converting circuits; fuses protect vehicle components and circuits by self-melting fuses, thereby protecting the safe operation of the entire circuit. Although simple fuses and relays can control and protect the vehicle circuit, from the perspective of vehicle layout, fuses and relays have poor dustproof, waterproof, impact and vibration resistance, so special attention should be paid to the layout position. Second, the reliability and life of fuses and relays cannot support the entire life cycle of the vehicle. It is necessary to check the condition of the fuses regularly and replace aging or damaged fuses in time to ensure their normal operation. Third, conventional fuses cannot achieve the actual current distribution required by components. Usually, the reserved insurance value is large or the melting time is long, which may damage some components in the circuit, burn the circuit, or even cause a fire, and fail to protect the safety of the circuit. Fourth, after the fuse and relay are damaged due to overload and other problems, the fuse and relay cannot recover by themselves and must be replaced for repair. Finally, there is one shortcoming. Fuses and relays cannot collect parameters such as current, temperature, and voltage in the circuit, which makes it inconvenient to detect and repair faults.

[0004] The subsequent development of low-voltage distribution boards will adopt a solution that uses power chips, fuses, and relays (such as Figure 1 As shown in the figure, MCU is used to control the main relays to ensure the safety and reliability of the low-voltage power distribution system, and at the same time, the management function of some low-voltage power supplies can be realized. The low-voltage distribution board of the coexistence solution is equipped with Hall sensors, temperature sensors, etc. for collecting current, voltage, temperature and other signals. It is also equipped with CAN communication function for real-time transmission of current, temperature, voltage and other parameters of key pins, which are used for other control logic of the vehicle to facilitate fault detection and maintenance. Although this solution can solve the protection and management of important nodes, the problems of fuses and relays still exist.

[0005] The existing body control system realizes functions such as vehicle door control and lighting control through a separate body module, and is not integrated with the low-voltage power distribution system.

[0006] In summary, the existing low-voltage power distribution system and body control system have the following problems:

[0007] 1. Poor performance in dustproof, waterproof, impact and vibration resistance;

[0008] 2. Reliability and lifespan cannot support the entire life cycle of the vehicle, and regular inspection and timely replacement are required;

[0009] 3. The reserved fuse value is too large or the fuse time is too long to provide timely protection;

[0010] 4. After damage, it cannot be restored by itself and must be repaired by replacement;

[0011] 5. Unable to collect parameters such as current, temperature and voltage in the circuit;

[0012] 6. There are many component nodes, which increases the complexity of connection and the difficulty of system maintenance, and also reduces the efficiency and reliability of the equipment.

[0013] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0014] The purpose of the present invention is to solve the technical problems existing in the background technology. To this end, a body domain controlled power distribution system for a bus is provided.

[0015] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0016] A bus body domain control power distribution system includes a domain controller, wherein the domain controller includes a power module, an input module, a control module and a communication module;

[0017] The power module is responsible for providing a stable power supply for the entire domain controller and also outputs a stable low-voltage power supply for various components of the vehicle;

[0018] The input module is used to receive external signals and output control signals and forward them to the control module through the communication module;

[0019] The control module is responsible for processing the signals collected by the input module and the network signals transmitted by the communication module to transmit and execute the control algorithm, control the power module to output a stable low-voltage power supply for each component of the vehicle, and detect the temperature, current, and voltage signals of each component of the vehicle, and transmit the monitored temperature, current, and voltage signals to the communication module;

[0020] The communication module is used for the domain controller to perform bus communication with other devices and realize data exchange and sharing.

[0021] The following is a technical solution further defined by the present invention. The input module receives the switch quantity, analog quantity, and PWM signal of the whole vehicle, identifies the type of the signal, compares and analyzes it, and then transfers it to the communication module. The communication module forwards the signal data to the external communication system or control module of the whole vehicle to realize the control of electrical appliances and signal collection.

[0022] The following is a technical solution further defined by the present invention, wherein the control module adopts a microprocessor and an embedded system.

[0023] The following is a technical solution further defined by the present invention. The communication module supports multiple communication protocols, including CAN, LIN, Ethernet, and 485 communication protocols, to achieve data transmission and control with various controllers, sensors, and control systems.

[0024] The following is a technical solution further defined by the present invention. The communication module transmits network data to the remote platform through the cloud bus, monitors the working status of each controller in real time through the display and fault screening of the remote platform, and performs early warning maintenance before a serious fault occurs.

[0025] The following is a technical solution further defined in the present invention, wherein the domain controller includes a front domain controller and a rear domain controller;

[0026] The front domain controller is installed at the front of the vehicle and is used to control the power supply and control of the components of the front circuit;

[0027] The rear domain controller is installed at the rear of the vehicle and is used to control the power supply and control of the components of the rear circuit.

[0028] Compared with the prior art, the present invention has the following technical effects:

[0029] 1. Completely replace relays and fuses, adopt digital input and output detection and control, with intelligent protection of over-current, over-voltage and over-temperature, to accurately locate hidden dangers of any sensor, electrical appliance, rocker switch, power supply, lighting and other modules, PIN pins or wiring harness numbers, and achieve efficient maintenance;

[0030] 2. Use the front and rear domains to perform PWM and time-sharing to open and shut down electrical appliances on the large, medium and small power supplies of the vehicle body, effectively curbing the peak current impact during vehicle operation and ensuring stable operation of the vehicle;

[0031] 3. Use key switches, main power switches, etc. to manage normal and deep sleep and wake-up of the vehicle body system, effectively realize battery power feeding protection, and improve the power management capabilities of the entire vehicle.

[0032] 4. Optimize vehicle architecture: The domain controller has a built-in 5-way CAN network and integrated gateway function to reduce the interaction between intermediate controllers; improve the support capability of CAN network architecture and reduce CAN load rate;

[0033] 5. Real-time monitoring and transmission of the fault and operating status of each ECU of the vehicle, providing a digital dashboard for precise maintenance, and effectively remotely monitoring the completeness rate of vehicle faults;

[0034] 6. Five controllers (front and rear power distribution boards, front and rear body modules, and gateway) are reduced to two controllers (front and rear domain control), reducing hardware costs; simplifying the system's connection method and maintenance difficulty; while also improving production efficiency and reducing failure rates.

[0035] The present invention is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 This is a working principle diagram of the existing technology using a power chip, a fuse, and a relay coexisting;

[0038] Figure 2 is a system connection relationship diagram of the present invention;

[0039] Figure 3 It is a control logic diagram of the front domain controller in the present invention;

[0040] Figure 4 It is a control logic diagram of the back-end controller in the present invention. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0042] like Figure 2-4 As shown, a body domain control and power distribution system for a bus is provided, including a domain controller.

[0043] The domain controller integrates functions such as body module control, low-voltage power distribution and vehicle electrical architecture upgrade. It is the power distribution and control part of the whole vehicle's CAN bus system. It mainly provides power for various components and real-time current detection. It has load output short-circuit protection, load overcurrent configuration and protection, etc. The internal parameter configuration of the module can be realized through the CAN bus, and relevant information can be sent to each module to realize real-time diagnosis of load status.

[0044] The domain controller consists of the following aspects: power module, input module, control module and communication module.

[0045] The power module is the basic module of the domain controller. It is responsible for providing stable power supply for the entire controller system, and also outputs stable low-voltage power for various components of the vehicle. It has functions such as over-current protection, over-voltage protection and over-temperature protection to ensure the safe and stable operation of the system.

[0046] The input module is the core component of the domain controller, which is used to receive external signals and output control signals. The input module receives the switch quantity, analog quantity, PWM and other signals of the vehicle, identifies the type of signal, compares and analyzes it, and then transfers it to the communication module. The communication module forwards the data to the vehicle's external communication system or control module to achieve control of electrical appliances and signal collection.

[0047] The control module is the intelligent core part of the domain controller. It is responsible for processing the signals collected by the input module and the network signals transmitted by the communication module to transmit and execute the corresponding control algorithms. It controls the power module to output stable low-voltage power to various components of the vehicle. At the same time, it detects the corresponding temperature, current, voltage and other signals to protect the controller in time, and transmits the monitored temperature, current and voltage to the communication module. The control module usually uses a microprocessor and an embedded system, etc., with high performance and real-time performance. It can adjust the output signal and execute the corresponding control strategy according to system requirements to realize the functions of the power distribution system and the body control system.

[0048] The communication module is a bus communication between the domain controller and other devices, and realizes data exchange and sharing. It can support multiple communication protocols, such as CAN, LIN, Ethernet, 485 and other communications, to realize data transmission and control with various controllers, sensors and control systems. At the same time, relevant network data can be transmitted to the remote platform through the cloud bus. Through the display and fault screening of the remote platform, the working status of each controller can be monitored in real time, and timely reminders can be given before serious faults occur, ensuring the safe and reliable operation of the entire vehicle.

[0049] Therefore, the present invention can effectively solve the problems existing in fuses and relays, and can realize the power distribution and control part of the CAN bus system of the whole vehicle: while supplying power to each component, the current thereof can be detected in real time, load short circuit protection, over-temperature protection, over-current configuration and protection, etc. can be realized, and the internal parameter configuration of the module can be realized through the CAN bus, and the relevant information can be sent to each module, so as to realize the real-time diagnosis of the load status.

[0050] This system has been used in batches on miniaturized buses. It has been verified through actual road tests and is suitable for complex urban roads and actual bus operation needs. In actual use, it can timely protect the safety of all electrical appliances in the vehicle, and also provide timely and convenient maintenance methods for after-sales.

[0051] Miniaturized models combine front-domain controllers and rear-domain controllers to achieve body control, low-voltage power distribution and management, and other functions, while optimizing the overall vehicle electrical architecture.

[0052] The front domain controller is installed at the front of the vehicle and is used to control the power supply of components in the front circuit and related controls; the control logic of the front domain controller is as follows: Figure 3 As shown:

[0053] The power module includes a power circuit. The input module includes a switch quantity circuit, an analog quantity acquisition circuit, and a PWM circuit. The control module includes an MCU and a power circuit. The communication module includes a communication circuit.

[0054] The communication circuit is electrically connected to 5 CAN communications and 1 LIN communication. The switch quantity circuit is electrically connected to 64 switch inputs. The analog quantity acquisition circuit is electrically connected to 4 sensor inputs. The PWM circuit is electrically connected to 1 vehicle speed acquisition and 1 vehicle speed output.

[0055] The power circuit outputs 12V / 1A, 1 channel 120A, 4 channels 20A, 14 channels 15A, 13 channels 10A, 25 channels 5A, 14 channels 3A and 8 channels 1A.

[0056] The rear domain controller is installed at the rear of the vehicle and is used to control the power supply and related control of the components of the rear circuit; the control logic of the rear domain controller is as follows: Figure 4 As shown:

[0057] The power module includes a power circuit. The input module includes a switch quantity circuit and an analog quantity acquisition circuit. The control module includes an MCU and a power circuit. The communication module includes a communication circuit.

[0058] The switch circuit is electrically connected to 10 switch inputs and K-line wake-up. The communication circuit is electrically connected to 2 CAN communications. The analog acquisition circuit is electrically connected to 3 sensors. The power circuit outputs 1 200A, 8 50A, 12 25A, and 24 9A.

[0059] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the above disclosed methods and technical contents without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, all equivalent changes made according to the shape, structure and principle of the present invention without departing from the content of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. The bus body domain control power distribution system is characterized by: It includes a domain controller, which includes a power module, an input module, a control module and a communication module; The power module is responsible for providing a stable power supply for the entire domain controller and also outputs a stable low-voltage power supply for various components of the vehicle; The input module is used to receive external signals and output control signals and forward them to the control module through the communication module; The control module is responsible for processing the signals collected by the input module and the network signals transmitted by the communication module to transmit and execute the control algorithm, control the power module to output a stable low-voltage power supply for each component of the vehicle, and detect the temperature, current, and voltage signals of each component of the vehicle, and transmit the monitored temperature, current, and voltage signals to the communication module; The communication module is used for the domain controller to perform bus communication with other devices and realize data exchange and sharing.

2. The bus body domain control power distribution system according to claim 1, characterized in that: The input module receives the switch quantity, analog quantity, and PWM signal of the whole vehicle, identifies the type of the signal, compares and analyzes it, and then transfers it to the communication module. The communication module forwards the signal data to the external communication system or control module of the whole vehicle to realize the control of electrical appliances and signal collection.

3. The bus body domain control power distribution system according to claim 1, characterized in that: The control module adopts a microprocessor and an embedded system.

4. The bus body domain control power distribution system according to claim 1, characterized in that: The communication module supports multiple communication protocols, including CAN, LIN, Ethernet, and 485 communication protocols, to achieve data transmission and control with various controllers, sensors, and control systems.

5. The bus body domain control power distribution system as claimed in claim 4, characterized in that: The communication module transmits network data to the remote platform through the cloud bus, monitors the working status of each controller in real time through the display and fault screening of the remote platform, and performs early warning and maintenance before a serious fault occurs.

6. The bus body domain control power distribution system as claimed in claim 1, characterized in that: The domain controller includes a front domain controller and a rear domain controller; The front domain controller is installed at the front of the vehicle and is used to control the power supply and control of the components of the front circuit; The rear domain controller is installed at the rear of the vehicle and is used to control the power supply and control of the components of the rear circuit.

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