A vehicle controller wake-up system

Abstract

The utility model discloses a vehicle controller awakening system belongs to the automobile electronic control technical field. The system includes normal power supply, power protection module, power supply voltage stabilizing module, controller, communication awakening module, wherein, normal power supply is connected with power supply voltage stabilizing module, communication awakening module respectively through power protection module, power supply voltage stabilizing module is connected to the power end of controller, the awakening signal output of communication awakening module and controller all are connected with the enable end of power supply voltage stabilizing module. The utility model has reduced system standby power consumption, provided a variety of awakening mode, improved system robustness.

Description

Technical Field

[0001] This utility model belongs to the field of automotive electronic control technology. Specifically, this utility model relates to a vehicle controller wake-up system. Background Technology

[0002] With the rapid development of electric vehicles and intelligent connected vehicles, the continuous power consumption of the on-board electronic control unit (ECU) has become a key factor affecting the overall vehicle energy consumption and driving range. In the prior art, for example, the patent publication with publication number 218122511U, published on 2022-12-23, entitled "A Multiplex Wake-up Circuit and Electronic Device for MCU," provides a multiplex wake-up circuit and electronic device for an MCU. Although this publication introduces multiple wake-up inputs, its power management circuit does not integrate power protection functions, resulting in insufficient system reliability under power transient conditions.

[0003] Data shows that traditional wake-up modules consume up to 12mW in standby mode. Over the entire vehicle lifecycle, this cumulative energy consumption significantly shortens battery life and reduces vehicle range. Furthermore, Advanced Driver Assistance Systems (ADAS) and Toll-to-The-Box (TBOX) systems require controllers with all-weather event response capabilities. Existing wake-up systems present a clear trade-off between power consumption, response time, and wake-up reliability, failing to meet the dual requirements of energy efficiency and functional safety for next-generation electronic and electrical architectures.

[0004] Therefore, this application proposes a vehicle controller wake-up system. Utility Model Content

[0005] This utility model aims to overcome the shortcomings of the prior art and proposes a vehicle controller wake-up system to achieve the following objectives: reduce system standby power consumption, provide multiple wake-up methods, and improve system robustness.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a vehicle controller wake-up system, the system comprising a constant power supply, a power protection module, a power voltage regulator module, a controller, and a communication wake-up module, wherein the constant power supply is connected to the power voltage regulator module and the communication wake-up module respectively through the power protection module; the power voltage regulator module is connected to the power supply terminal of the controller; and the wake-up signal output terminals of the communication wake-up module and the controller are both connected to the enable terminal of the power voltage regulator module.

[0007] Preferably, the power protection module includes an overvoltage and undervoltage protection unit for cutting off the circuit when the voltage is overvoltage or undervoltage.

[0008] Preferably, the power supply regulator module includes a BUCK unit and a low-dropout linear regulator, and the power protection module is connected to the power supply terminal of the controller in sequence through the BUCK unit and the low-dropout linear regulator.

[0009] Preferably, the communication wake-up module includes a CAN module, a LIN module, a FlexRAY module, an in-vehicle Ethernet communication module T1, and a standard Ethernet communication module TX. The wake-up signal output terminals of the CAN module, LIN module, FlexRAY module, in-vehicle Ethernet communication module T1, and standard Ethernet communication module TX are all connected to the enable terminal of the power supply regulator module.

[0010] Preferably, the controller uses a dual-core MCU.

[0011] Preferably, the constant power supply is a KL30.

[0012] Preferably, an EMC filter is also connected between the constant power supply and the power protection module.

[0013] The technical effects of this utility model are as follows: 1. This utility model integrates the power protection module and the communication wake-up module in the front stage, realizing parallel processing of system-level power management and multiple wake-up signals, significantly reducing the power consumption of the front stage while ensuring reliability; the power protection module ensures reliable power supply through undervoltage and overvoltage protection.

[0014] 2. The multi-modal wake-up mechanism enables system recovery through the remaining buses even when a single communication link fails, improving the system's availability under complex electromagnetic environments and fault conditions.

[0015] 3. A dual-core MCU and partitioned power supply strategy are adopted to achieve on-demand allocation of power consumption and performance, meeting the requirements of fast startup and high real-time control. Attached Figure Description

[0016] Figure 1 This is a circuit diagram of a vehicle controller wake-up system according to an embodiment of the present invention. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. The purpose is to help those skilled in the art to have a more complete, accurate, and in-depth understanding of the inventive concept and technical solution of this utility model, and to facilitate its implementation. It should be noted that the terms "first," "second," etc., used in this application are only for the convenience of describing the technical solution and distinguishing different components, and are not intended to limit this application. To make the technical solution of this utility model clearer, it will be explained and illustrated through the following embodiments.

[0018] This embodiment provides a vehicle controller wake-up system. The system includes a constant power supply, a power protection module, a power voltage regulator module, a controller, and a communication wake-up module. The constant power supply is connected to the power voltage regulator module and the communication wake-up module via the power protection module. The power voltage regulator module is connected to the power supply terminal of the controller. The wake-up signal output terminals of both the communication wake-up module and the controller are connected to the enable terminal of the power voltage regulator module. The following describes the implementation in conjunction with... Figure 1 The circuit diagram shown below provides a detailed description of the system in this embodiment.

[0019] In this embodiment, the constant power supply uses a KL30, which maintains power even when the vehicle is off. The output of the KL30 after passing through the power protection module is divided into two power domains: a constant power supply domain and a controllable power supply domain. The constant power supply domain powers the communication wake-up module, ensuring that the wake-up source always has a normal power supply and can provide a wake-up signal at any time. The controllable power supply domain powers the controller through a power voltage regulator module.

[0020] Optionally, in this embodiment, an EMC filter is also connected between the constant power supply and the power protection module. The EMC filter is used to reduce interference and improve the electromagnetic compatibility of the system.

[0021] The power protection module in this embodiment includes an overvoltage and undervoltage protection unit (OVP ULVO) for cutting off the circuit in case of overvoltage or undervoltage. The overvoltage and undervoltage protection unit can be an electronic fuse, integrating overvoltage and undervoltage protection functions. If the input voltage is undervoltage, the undervoltage lockout (UVLO) function in the electronic fuse immediately cuts off the circuit to protect the system; if the input voltage is overvoltage, the OVP function of the electronic fuse immediately cuts off the circuit to protect the system. When the controller is in sleep mode, the power protection module remains operational to ensure a safe voltage is provided for the communication wake-up module.

[0022] The power supply regulator module in this embodiment includes a BUCK unit and a low-dropout linear regulator (LDO). The power protection module is connected to the power supply terminal of the controller via the BUCK unit and the LDO in sequence. The BUCK unit is used to reduce the higher input voltage to a suitable voltage, and the LDO is used to further regulate the voltage output by the BUCK unit before outputting it to the controller. The enable of the BUCK unit and the LDO is controlled by the communication wake-up module and the wake-up signal of the controller. When the controller is in sleep mode, i.e., when there is no valid wake-up signal, the power supply regulator module stops supplying power to the controller to further reduce power consumption.

[0023] The communication wake-up module in this embodiment provides multiple wake-up sources, including a CAN module, a LIN module, a FlexRAY module, an in-vehicle Ethernet communication module T1, and a standard Ethernet communication module TX. The wake-up signal output terminals of the CAN module, LIN module, FlexRAY module, in-vehicle Ethernet communication module T1, and standard Ethernet communication module TX are all connected to the enable terminal of the power supply regulator module. This multi-modal wake-up mechanism allows the system to recover via the remaining buses even if a single communication link fails, improving the system's availability under complex electromagnetic environments and fault conditions. The CAN module uses a TJA1145 transceiver, supporting CAN FD and selective wake-up; the LIN module uses a TJA1021, conforming to the LIN 2.2 / SAE J2602 standard; the FlexRAY module is implemented using the ETAS BR8000, supporting cold start and remote wake-up; the vehicle Ethernet communication module T1 uses the BroadR-Reach® physical layer, supporting 100 / 1000BASE-T1 and WoL; the standard Ethernet communication module TX uses a DP83822, supporting 10 / 100 / 1000M adaptive and WoL. The communication wake-up module remains active even when the system is in sleep mode.

[0024] The controller in this embodiment uses a dual-core MCU, including a low-power core and a high-power core. When the system is in sleep mode, only the low-power core operates. When any wake-up source generates a valid signal to enable the power supply regulator module, the power supply regulator module supplies power to the controller. At this time, the low-power core completes event recognition within 1ms and triggers the main core power supply and task switching, ensuring the system enters the working state within 30ms.

[0025] The system in this embodiment uses AEC-Q100 Grade 1 components throughout the circuit, supports an operating range of -40°C to +125°C, and meets automotive-grade reliability standards.

[0026] The working principle of the system in this embodiment is as follows: The KL30 is powered normally and outputs power to the power regulator module and communication wake-up module through the power protection module. When any of the CAN module, LIN module, FlexRAY module, vehicle Ethernet communication module T1, or standard Ethernet communication module TX in the communication wake-up module outputs a valid wake-up signal PWE_UP, the enable terminal of the power regulator module receives the wake-up signal PWE_UP and outputs a stable voltage to the controller. At this time, the controller is woken up and starts working. At the same time, it continuously outputs a valid wake-up signal PWE_UP to the power regulator module to maintain the controller's wake-up state.

[0027] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A vehicle controller wake-up system, characterized in that: The system includes a constant power supply, a power protection module, a power voltage regulator module, a controller, and a communication wake-up module. The constant power supply is connected to the power voltage regulator module and the communication wake-up module through the power protection module. The power voltage regulator module is connected to the power supply terminal of the controller. The wake-up signal output terminals of the communication wake-up module and the controller are both connected to the enable terminal of the power voltage regulator module.

2. The vehicle controller wake-up system according to claim 1, characterized in that: The power protection module includes overvoltage and undervoltage protection units, which are used to cut off the circuit when the voltage is overvoltage or undervoltage.

3. The vehicle controller wake-up system according to claim 1, characterized in that: The power supply regulator module includes a BUCK unit and a low-dropout linear regulator. The power protection module is connected to the power supply terminal of the controller in sequence through the BUCK unit and the low-dropout linear regulator.

4. The vehicle controller wake-up system according to claim 1, characterized in that: The communication wake-up module includes a CAN module, a LIN module, a FlexRAY module, an in-vehicle Ethernet communication module T1, and a standard Ethernet communication module TX. The wake-up signal output terminals of the CAN module, LIN module, FlexRAY module, in-vehicle Ethernet communication module T1, and standard Ethernet communication module TX are all connected to the enable terminal of the power supply regulator module.

5. A vehicle controller wake-up system according to claim 1, characterized in that: The controller uses a dual-core MCU.

6. A vehicle controller wake-up system according to claim 1, characterized in that: The constant power supply is KL30.

7. A vehicle controller wake-up system according to claim 1, characterized in that: An EMC filter is also connected between the constant power supply and the power protection module.

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