Low power consumption vehicle body controller

Abstract

The application relates to a low-power-consumption vehicle body controller which comprises a power conversion module, a control module, a wake-up signal module and a wake-up module; the power conversion module is electrically connected with the control module, the wake-up signal module and the wake-up module; the control module is electrically connected with the wake-up signal module and the wake-up module; the wake-up signal module is electrically connected with the wake-up module; the power conversion module is used for converting a power supply voltage into a preset voltage to supply power to other modules; the wake-up signal module is used for interacting with a wake-up source to generate a wake-up signal and sending the wake-up signal to the wake-up module; and the wake-up module is used for waking up the vehicle body controller when the wake-up signal is valid and cutting off a static current when the wake-up signal is invalid. The low-power-consumption vehicle body controller provided by the application can cut off the wake-up circuit module when the wake-up signal is invalid, so that an effective loop cannot be formed, and the power consumption is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicle body wake-up technology, and particularly relates to a low-power vehicle body controller. BACKGROUND

[0002] The vehicle body controller (BCM) is used for controlling the light system, door lock system, window system, wiper washing system and exterior rearview mirror of the vehicle, and is one of the most frequently used control modules in the vehicle body electronic system. Based on the requirements of regulations and user experience, many vehicle electrical devices need to respond to user operation at any time to enter the working state in the parked and powered-off state. Reducing the static current of the vehicle, prolonging the standby time of the vehicle, and avoiding the influence of the battery feed on the service life of the battery have always been one of the focuses in the industry.

[0003] Currently, from the perspective of the whole vehicle, the OSEK / AUTOSAR network management mechanism is used to make each network node unit enter sleep; from the perspective of the control unit component, the control unit generally retains the working ability of the CAN module and closes other functions to achieve the purpose of reducing power consumption.

[0004] For the BCM, because there are many application scenarios in the parked state, it is necessary to comprehensively consider the software and hardware design to achieve the purpose of reducing the static current to the maximum extent. In the prior art, when there are many wake-up sources, the cost of the BCM design is high, and the static current cannot be eliminated, and there is still a certain power consumption. SUMMARY

[0005] Therefore, it is necessary to provide a low-power vehicle body controller to solve the problem that the cost of the BCM design is high and the static current cannot be eliminated when there are many wake-up sources in the prior art.

[0006] To achieve the above technical purposes, the present application adopts the following technical solutions:

[0007] In a first aspect, the present application provides a low-power vehicle body controller, comprising: a power conversion module, a control module, a wake-up signal module and a wake-up module; the power conversion module is electrically connected with the control module, the wake-up signal module and the wake-up module; the control module is further electrically connected with the wake-up signal module and the wake-up module; and the wake-up signal module is further electrically connected with the wake-up module.

[0008] The power conversion module is used for converting the power supply voltage into a preset voltage to supply power to other modules; the wake-up signal module is used for interacting with the wake-up source to generate a wake-up signal and sending the wake-up signal to the wake-up module; and the wake-up module is used for waking up the vehicle body controller when the wake-up signal is valid, and cutting off the static current when the wake-up signal is invalid.

[0009] Preferably, the wake-up signal module comprises a digital signal wake-up module and an analog signal wake-up module; the digital signal wake-up module and the analog signal wake-up module are electrically connected with the wake-up module respectively;

[0010] The digital signal wake-up module is used for generating a digital wake-up signal and sending the digital wake-up signal to the wake-up module; and the analog signal wake-up module is used for generating an analog wake-up signal and sending the analog wake-up signal to the wake-up module.

[0011] Preferably, the wake-up module comprises a digital signal wake-up circuit and an analog signal wake-up circuit; the digital signal wake-up circuit is electrically connected with the analog signal wake-up circuit; and the digital signal wake-up circuit and the analog signal wake-up circuit are electrically connected with the control module respectively;

[0012] The digital signal wake-up circuit is used for receiving a digital wake-up signal, and outputting an effective signal to the control module to wake up the vehicle body controller when the digital wake-up signal is effective; and the analog signal wake-up circuit is used for receiving an analog wake-up signal, and outputting an effective signal to the control module to wake up the vehicle body controller when the analog wake-up signal is effective.

[0013] Preferably, the analog signal wake-up circuit comprises a diode Q1, resistors R1, R2, R3, R4 and R5, and a diode D1.

[0014] The base of the diode Q1 is electrically connected with one end of the resistor R2; the other end of the resistor R1 is electrically connected with the anode of the diode D1; the cathode of the diode D1 is electrically connected with the digital signal wake-up circuit; the resistor R1 is connected between the base and the emitter of the diode Q1; the collector of the diode Q1 is electrically connected with one end of the resistor R3; the other end of the resistor R3 is electrically connected with the resistor R4 and the resistor R5; the other end of the resistor R4 is grounded; and the other end of the resistor R5 is electrically connected with the control module.

[0015] Preferably, the digital signal wake-up circuit comprises a diode D2, capacitors C3 and C4, and resistors R6, R7 and R8.

[0016] The cathode of the diode D2 is electrically connected with the analog signal wake-up circuit and one end of the capacitor C3; the other end of the capacitor C3 is grounded; the anode of the diode D2 is electrically connected with one end of the resistor R6 and the resistor R7; the other end of the resistor R7 is electrically connected with the resistor R8 and one end of the capacitor C4 respectively; and the other end of the resistor R8 and the capacitor C4 is grounded.

[0017] Preferably, the vehicle body controller further comprises a bus; the bus is electrically connected with the power conversion module, the control module, the wake-up signal module and the wake-up module respectively; and the bus is used for information exchange among the modules.

[0018] Preferably, the vehicle body controller further comprises a controlled function module; the controlled function module is electrically connected with the power conversion module; the controlled function module is used for adding multiple functions for the vehicle after the vehicle body controller is woken up.

[0019] Preferably, the vehicle body controller further comprises a CAN transceiver module; the CAN transceiver module is electrically connected with the power conversion module, the bus and the control module; the CAN transceiver module is used for converting the TTL signal of the CAN controller into the differential signal of the CAN bus, so as to realize the CAN communication.

[0020] Preferably, the vehicle body controller further comprises a radio frequency module; the radio frequency module is electrically connected with the power conversion module and the bus; the radio frequency module is used for receiving the radio frequency signal emitted by the vehicle remote key.

[0021] Preferably, the power conversion module converts the 24V voltage of the whole vehicle into a 5V voltage.

[0022] The beneficial effects of the above embodiment are that: the low-power-consumption vehicle body controller provided by the application interacts with the wake-up source through the wake-up signal module, generates corresponding wake-up signals, and sends the wake-up signals to the wake-up module; when any wake-up signal received by the wake-up module is valid, the wake-up module is turned on, so that the control module is interrupted, thereby waking up the BCM, and the vehicle circuit resumes the running state; when the wake-up signal received by the wake-up module is invalid, the wake-up module is cut off, and an effective loop cannot be formed inside the wake-up module, thereby eliminating the static current loss; and when the wake-up source increases, the wake-up module does not need to be increased, thereby reducing the design cost of the system. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The structural principle diagram of an embodiment of the low-power-consumption vehicle body controller provided by the application is shown in the figure.

[0024] Figure 2 The circuit structure diagram of an embodiment of the analog signal wake-up circuit provided by the application is shown in the figure.

[0025] Figure 3 The circuit structure diagram of an embodiment of the digital signal wake-up circuit provided by the application is shown in the figure.

[0026] Figure 4 The state conversion diagram of an embodiment of the working state conversion of the vehicle controller provided by the application is shown in the figure. DETAILED DESCRIPTION

[0027] The preferred embodiments of the application are specifically described below in combination with the drawings, wherein the drawings form a part of the application, and are used together with the embodiments of the application to explain the principles of the application, but are not used to limit the scope of the application.

[0028] Before the embodiments of the application are described, the related words are explained:

[0029] BCM: Body Control Module, mainly to coordinate the work of the body through electronic signals function parts, the body control module can control including doors and windows, airbags, turn signals and wipers, etc. Electronic components.

[0030] MCU: Micro Control Unit, also known as single-chip microcomputer or microcontroller, refers to the CPU, RAM, ROM, timing counter and a variety of I / O interface integrated on a chip, forming a chip-level computer.

[0031] In the description of the present application, the meaning of "a plurality of" is two or more than two, unless otherwise explicitly specified.

[0032] In this paper, the "embodiment" means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily refer to the same embodiment, nor is it independent or alternative to other embodiments. The skilled person in the art explicitly and implicitly understands that the embodiments described herein can be combined with other embodiments.

[0033] Please refer to Figure 1 , Figure 1 The structure principle diagram of an embodiment of the low-power consumption body control provided by the present application, a specific embodiment of the present application discloses a low-power consumption body control, comprising: a power conversion module 10, a control module 20, a wake-up signal module 30 and a wake-up module 40; the power conversion module 10 is electrically connected with the control module 20, the wake-up signal module 30 and the wake-up module 40 respectively; the control module 20 is further electrically connected with the wake-up signal module 30 and the wake-up module 40 respectively; the wake-up signal module 30 is further electrically connected with the wake-up module 40;

[0034] The power conversion module 10 is used for converting the power supply voltage into a preset voltage for power supply of other modules; the wake-up signal module 30 is used for interacting with the wake-up source to generate a wake-up signal and sending the wake-up signal to the wake-up module 40; the wake-up module 40 is used for waking up the body control when the wake-up signal is valid; and the static current is cut off when the wake-up signal is invalid.

[0035] In the above embodiment, the power conversion module 10 can provide two voltage output modes, one of which is a constant voltage output, and the constant voltage is maintained in the vehicle body control parking power-off state, that is, the sleep state, to meet the power supply requirements of the basic functions of the vehicle, such as danger alarm function, welcome function, RKE (automobile remote key entry) communication, CAN communication, etc. The other is a controllable voltage, which stops power supply when the vehicle body control is in parking power-off state, thereby reducing the loss of electric energy.

[0036] The control module 20 is an MCU, coordinates to control each function module of the vehicle body controller to realize respective functions, has an interrupt interface, when the wake-up module 40 judges that a wake-up signal is valid, generates a high level input to the interrupt interface, realizes an interruption, wakes up the vehicle body controller, and the vehicle changes from a low-power sleep state to a normal working state. After the vehicle is parked and powered off, the MCU enters a deep sleep mode, is used for watchdog feeding and listens to a wake-up signal.

[0037] Compared with the prior art, the low-power vehicle body controller provided in the embodiment interacts with a wake-up source through the wake-up signal module 30, generates a corresponding wake-up signal, and sends the wake-up signal to the wake-up module 40. When any wake-up signal received by the wake-up module 40 is valid, conduction is enabled, so that the control module 20 is interrupted, thereby waking up the BCM, and the vehicle circuit resumes a running state. When the wake-up signal received by the wake-up module 40 is invalid, the wake-up module 40 is cut off, and an effective loop cannot be formed in the wake-up module 40, thereby eliminating static current loss. When the number of wake-up sources increases, the wake-up module 40 does not need to be increased, and the design cost of the system is reduced.

[0038] In some embodiments of the application, the wake-up signal module 30 includes a digital signal wake-up module 40 and an analog signal wake-up module 40; the digital signal wake-up module 40 and the analog signal wake-up module 40 are respectively electrically connected to the wake-up module 40.

[0039] The digital signal wake-up module 40 is used for generating a digital wake-up signal and sending the digital wake-up signal to the wake-up module 40; and the analog signal wake-up module 40 is used for generating an analog wake-up signal and sending the analog wake-up signal to the wake-up module 40.

[0040] In the above embodiment, the wake-up signal is mainly divided into a digital wake-up signal and an analog wake-up signal, and the two kinds of wake-up signals are only different in form, but their wake-up effects are not different. It can be understood that the digital signal wake-up module 40 and the analog signal wake-up module 40 in the application can also have a plurality of specific wake-up source modules, and the embodiments of the application do not further limit the number and specific form of the wake-up source, but only require that the generated wake-up signal can be accurately identified.

[0041] In some embodiments of the application, the wake-up module 40 includes a digital signal wake-up circuit and an analog signal wake-up circuit; the digital signal wake-up circuit and the analog signal wake-up circuit are electrically connected; and the digital signal wake-up circuit and the analog signal wake-up circuit are both electrically connected to the control module 20.

[0042] The digital signal wake-up circuit is used for receiving a digital type wake-up signal, and outputs a valid signal to the control module 20 to wake up the vehicle body controller when the digital type wake-up signal is valid.

[0043] In the above embodiment, the digital signal wake-up circuit and the analog signal wake-up circuit correspond to detecting and judging the digital wake-up signal and the analog wake-up signal respectively, so as to realize judging whether the wake-up signals of different types are valid.

[0044] Please refer to Figure 2 , Figure 2 The circuit structure diagram of an embodiment of the analog signal wake-up circuit provided by the present application, in some embodiments of the present application, the analog signal wake-up circuit comprises: diode Q1, resistors R1, R2, R3, R4, R5, diode D1;

[0045] The base of the diode Q1 is electrically connected with one end of the resistor R2, the other end of the resistor R1 is electrically connected with the positive electrode of the diode D1, and the negative electrode of the diode D1 is electrically connected with the digital signal wake-up circuit; the resistor R1 is connected between the base and the emitter of the diode Q1; the collector of the diode Q1 is electrically connected with one end of the resistor R3, the other end of the resistor R3 is electrically connected with the resistor R4 and the resistor R5, the other end of the resistor R4 is grounded, and the other end of the resistor R5 is electrically connected with the control module 20.

[0046] In the above embodiment, when the analog wake-up signal is valid (low level), R1 / R2 forms a clamping voltage, so that the triode Q1 is turned on, R3 / R4 / R5 forms a voltage dividing circuit, VCC is converted into a high level signal recognizable by the MCU after passing through the voltage dividing circuit composed of R3 / R4 / R5, that is, the voltage at the end of TP3, TP3 is connected with the middle segment interface of the MCU, and is used for realizing external interrupt triggering. When the MCU detects that the analog wake-up signal is valid (high level), the BCM is switched from the sleep state to the working state.

[0047] Please refer to Figure 3 , Figure 3 The circuit structure diagram of an embodiment of the digital signal wake-up circuit provided by the present application, in some embodiments of the present application, the digital signal wake-up circuit comprises: diode D2, capacitors C3, C4, resistors R6, R7, R8;

[0048] The cathode of the diode D2 is electrically connected with the analog signal wake-up circuit and one end of the capacitor C3, the other end of the capacitor C3 is grounded, the anode of the diode D2 is electrically connected with one end of the resistor R6 and the resistor R7, the other end of the resistor R7 is respectively electrically connected with the resistor R8 and one end of the capacitor C4, the other end of the resistor R8 and the capacitor C4 is grounded.

[0049] In the above embodiment, the voltage division circuit composed of R5 / R6 / R7 / R8 is used to convert the controllable voltage VCC_SW into a digital signal recognizable by the MCU, and when the digital wake-up signal is valid (low level), VCC_SW is converted into a high level signal (TP2) after passing through the voltage division circuit, TP2 is connected with the middle section interface of the MCU, and is used to realize external interrupt triggering, and when the digital wake-up signal is invalid (floating), TP2 is a low level signal.

[0050] In some embodiments of the present application, the body controller further comprises a bus 50, the bus 50 is electrically connected with the power conversion module 10, the control module 20, the wake-up signal module 30 and the wake-up module 40 respectively; the bus 50 is used for information exchange between the modules.

[0051] In the above embodiment, the bus 50 is a common communication trunk for transmitting information between various functional components of the body controller system, which is a transmission wire harness composed of wires, the bus 50 is electrically connected with the power conversion module 10, the control module 20, the wake-up signal module 30 and the wake-up module 40, and transmits information of each module, and each module obtains the information required by itself according to the communication logic thereof.

[0052] In some embodiments of the present application, the body controller further comprises a controlled function module; the controlled function module is electrically connected with the power conversion module 10; the controlled function module is used to add multiple functions to the vehicle after the body controller is woken up.

[0053] In the above embodiment, the controlled function module realizes power supply by providing a controlled point voltage through the power conversion module 10, and the controlled function module is powered off and does not work when the body controller system is in sleep state, so that the loss of the body controller system in the sleep state can be reduced. The controlled function module can have multiple modules, such as a normal switch detection module, an AD quantity detection module, an IO expansion module, a low drive power module and the like, and the embodiments of the present application do not make further limitation on the controlled function module.

[0054] In some embodiments of the present application, the body controller further comprises a CAN transceiver module 60; the CAN transceiver module 60 is electrically connected with the power conversion module 10, the bus 50 and the control module 20; the CAN transceiver module 60 is used to convert the TTL signal of the CAN controller into a differential signal of the CAN bus 50, so as to realize CAN communication.

[0055] In the above embodiment, the CAN transceiver module 60 is a CAN transceiver, that is, a conversion chip similar to 232 or 485, which mainly converts the data provided by the CAN controller into an electrical signal and then sends it out through the data bus 50. At the same time, it also receives the data of the bus 50 and sends the data to the CAN controller. The CAN transceiver module 60 is powered by the power conversion module 10 to provide a constant voltage to achieve power supply.

[0056] In some embodiments of the application, the vehicle body controller further comprises a radio frequency module 70; the radio frequency module 70 is electrically connected with the power conversion module 10 and the bus 50; the radio frequency module 70 is used to receive the radio frequency signal emitted by the vehicle remote key.

[0057] In the above embodiment, the radio frequency module 70 is an RF receiver, and the vehicle remote key can emit a specific electromagnetic signal, that is, an RF signal. The RF receiver can identify the corresponding electromagnetic signal of the vehicle and generate a corresponding signal to realize the corresponding function, that is, to wake up or hibernate the vehicle.

[0058] In some embodiments of the application, the power conversion module 10 converts the whole vehicle 24V voltage into 5V voltage.

[0059] In the above embodiment, the input voltage of the power conversion module 10 is the whole vehicle 24V constant power supply, which is converted into stable 5V power supply. According to the use scene of each functional module, the stable 5V power supply is divided into constant 5V functional module and controllable 5V functional module. The constant 5V functional module can continuously supply power in the hibernation state of the vehicle body controller system, and the modules connected with the constant 5V functional module can keep working to maintain the basic functions of the vehicle. The controllable 5V functional module is powered off in the hibernation state of the vehicle body controller system, and the modules connected with the controllable 5V functional module stop working to reduce power consumption.

[0060] Please refer to Figure 4 , Figure 4The state transition diagram of an embodiment of the vehicle controller working state transition provided by the application is shown in the figure. In the embodiment of the application, when the sleep condition is met, the MCU controls the 5V controllable electric VCC_SW to be turned off, at which time all the load modules of the 5V controllable electric are powered off and stop working, the MCU enters the low-power mode, the clock of the 5V controllable electric function module is turned off, and the software end stops scanning and detecting all the external hard-wire input signals. At this time, the tasks performed by the software end include: RF receiving signal detection, CAN network management message detection, and watchdog feeding. When the BCM is woken up, the specific wake-up ways include: external interrupt wake-up, CAN network wake-up, RF signal wake-up, etc. The BCM is immediately switched from the low-power mode to the working mode, the 5V controllable electric VCC_SW is controlled to be turned on, the controllable electric load modules start to be powered on and work, and the MCU starts all the peripheral clocks and simultaneously scans and detects the external input signals.

[0061] The embodiment provided by the application divides the function power modules of the BCM in the power-off scene, newly designs the power supply architecture, and innovatively designs the external wake-up type switch signal detection circuit. The static current of the BCM is about 2.4mA, which is about 0.8mA lower than that of the similar products in the market (about 3.2mA), and the static current is reduced by 25%. By applying the application scheme to other controller products of the whole vehicle, the static current of the whole vehicle can be effectively reduced, the static loss of the whole vehicle can be reduced, and the battery endurance time can be prolonged.

[0062] The above is only the preferred embodiment of the application, but the protection scope of the application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the application, which should be covered in the protection scope of the application.

Claims

1. A low-power body controller, characterized by, The application relates to a vehicle body controller wake-up module. The module comprises a power conversion module, a control module, a wake-up signal module and a wake-up module; the power conversion module is electrically connected with the control module, the wake-up signal module and the wake-up module; the control module is electrically connected with the wake-up signal module and the wake-up module; and the wake-up signal module is electrically connected with the wake-up module. The power conversion module is used for converting a power supply voltage into a preset voltage to supply power to other modules; the wake-up signal module is used for interacting with a wake-up source to generate a wake-up signal and sending the wake-up signal to the wake-up module; and the wake-up module is used for waking up the vehicle body controller when the wake-up signal is valid and cutting off a static current when the wake-up signal is invalid. The power conversion module provides two voltage output modes of a constant voltage and a controllable voltage; the constant voltage maintains basic functions of the vehicle in a vehicle body controller parking power-off state; and the controllable voltage stops power supply in the vehicle body controller parking power-off state and supplies power to the wake-up module when the wake-up signal is valid. The wake-up module comprises a digital signal wake-up circuit and an analog signal wake-up circuit. The analog signal wake-up circuit comprises a triode Q1, resistors R1, R2, R3, R4 and R5 and a diode D1. The base of the triode Q1 is electrically connected with one end of the resistor R2; the other end of the resistor R1 is electrically connected with the positive electrode of the diode D1; the negative electrode of the diode D1 is electrically connected with the digital signal wake-up circuit; the resistor R1 is connected across the base and the emitter of the triode Q1; the collector of the triode Q1 is electrically connected with one end of the resistor R3; the other end of the resistor R3 is electrically connected with the resistor R4 and the resistor R5; the other end of the resistor R4 is grounded; and the other end of the resistor R5 is electrically connected with the control module. The digital signal wake-up circuit comprises a diode D2, capacitors C3 and C4 and resistors R6, R7 and R8. The cathode of the diode D2 is electrically connected with the analog signal wake-up circuit and one end of the capacitor C3; the other end of the capacitor C3 is grounded; the anode of the diode D2 is electrically connected with one end of the resistor R6 and the resistor R7; the other end of the resistor R7 is electrically connected with the resistor R8 and one end of the capacitor C4; and the other end of the resistor R8 and the capacitor C4 is grounded.

2. The low power consumption body controller according to claim 1, characterized by The wake-up signal module comprises a digital signal wake-up module and an analog signal wake-up module; the digital signal wake-up module and the analog signal wake-up module are electrically connected with the wake-up module. The digital signal wake-up module is used for generating a digital wake-up signal and sending the digital wake-up signal to the wake-up module; and the analog signal wake-up module is used for generating an analog wake-up signal and sending the analog wake-up signal to the wake-up module.

3. The low power consumption body controller according to claim 2, characterized in that, The digital signal wake-up circuit and the analog signal wake-up circuit are electrically connected with the control module. The digital signal wake-up circuit is used for receiving a digital type wake-up signal, and outputs a valid signal to the control module to wake up the vehicle body controller when the digital type wake-up signal is valid.

4. The low power consumption body controller of claim 1, wherein, The vehicle body controller further comprises a bus, which is electrically connected with the power conversion module, the control module, the wake-up signal module and the wake-up module respectively; the bus is used for information exchange among the modules.

5. The low power consumption body controller according to claim 4, characterized in that, The vehicle body controller further comprises a controlled function module; the controlled function module is electrically connected with the power conversion module; the controlled function module is used for adding multiple functions to the vehicle after the vehicle body controller is woken up.

6. The low power consumption body controller according to claim 4, characterized by The vehicle body controller further comprises a CAN transceiver module; the CAN transceiver module is electrically connected with the power conversion module, the bus and the control module; the CAN transceiver module is used for converting a TTL signal of a CAN controller into a differential signal of the bus to realize CAN communication.

7. The low power consumption body controller according to claim 4, characterized by The vehicle body controller further comprises a radio frequency module; the radio frequency module is electrically connected with the power conversion module and the bus; the radio frequency module is used for receiving a radio frequency signal emitted by a vehicle remote key.

8. The low power consumption body controller of claim 1, wherein, The power conversion module converts a whole vehicle 24V voltage into a 5V voltage.

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