WO2023001226A1

WO2023001226A1 - Wake-up control device and vehicle

Info

Publication number: WO2023001226A1
Application number: PCT/CN2022/106983
Authority: WO
Inventors: 韩波
Original assignee: 北京车和家信息技术有限公司
Priority date: 2021-07-23
Filing date: 2022-07-21
Publication date: 2023-01-26
Also published as: CN215494621U

Abstract

The present invention relates to a wake-up control device and a vehicle. The wake-up control device comprises: a control unit, a wake-up unit, and a plurality of wake-up sources. The wake-up unit is connected to the plurality of wake-up sources; the control unit is connected to the wake-up unit; the control unit sends a low-power consumption switching signal to the wake-up unit before sleep, to instruct the wake-up unit to enter a sleep mode; after receiving a wake-up signal of at least one wake-up source in the plurality of wake-up sources, the wake-up unit switches from the sleep mode to a working mode and outputs a wake-up trigger signal to the control unit; the control unit switches from the sleep mode to the working mode on the basis of the wake-up trigger signal.

Description

Wake-up controls and vehicles

Cross References to Related Applications

This application is based on a Chinese patent application with application number 202121695705.1 and a filing date of July 23, 2021, and claims the priority of this Chinese patent application. The entire content of this Chinese patent application is hereby incorporated by reference into this application.

technical field

The present disclosure relates to the technical field of automobiles, in particular to a wake-up control device and a vehicle.

Background technique

With the development of automotive electronics technology, there are more and more control units inside the vehicle, so the static power consumption of the control unit has become an important indicator of vehicle design. The static power consumption of the control unit directly affects the output power of the battery. The greater the static power consumption of the control unit, the faster the battery power will be consumed, and the higher the battery capacity requirement. If the static power consumption of the control unit is too large, it will greatly reduce the standing time of the vehicle, reduce the cruising range, and even cause the battery of the vehicle to fail to start normally due to power loss. Therefore, the control unit needs to have a sleep function, that is, the control unit enters the sleep mode when it does not need to work to reduce power consumption and energy consumption; when it needs to work normally, it switches from the sleep mode to the working mode to realize its normal operation.

When the car needs many wake-up source channels, the problem of insufficient wake-up source interfaces of the control unit will be encountered. At this time, it is necessary to redesign the control unit, increase the wake-up source interface of the control unit, and connect with each wake-up source one by one, so as to receive the wake-up source signal. This will lead to the need to design control units with different numbers of wake-up source interfaces for situations that require different numbers of wake-up sources. Therefore, the compatibility of the control unit in the prior art is poor, and the cost of redesigning and replacing the control unit will be too high.

Contents of the invention

Based on this, it is necessary to provide a wake-up control device and a vehicle for the above-mentioned technical problems, so as to solve the problem of poor compatibility of control units and the need to design control units with different numbers of wake-up source interfaces for different numbers of wake-up sources.

In a first aspect, an embodiment of the present disclosure provides a wake-up control device, including:

a control unit, a wake-up unit and multiple wake-up sources;

The wake-up unit is connected to the multiple wake-up sources; the control unit is connected to the wake-up unit;

The control unit sends a low-power switching signal to the wake-up unit before sleep, instructing the wake-up unit to enter the sleep mode; after the wake-up unit receives a wake-up signal from at least one wake-up source among the multiple wake-up sources , switch from the sleep mode to the work mode, and output a wake-up trigger signal to the control unit; the control unit switches from the sleep mode to the work mode based on the wake-up trigger signal.

In one embodiment, when the state of the at least one wake-up source changes, the wake-up signal corresponding to the at least one wake-up source is sent to the wake-up unit.

In one embodiment, the connection between the control unit and the wake-up unit further includes: the control unit is connected to the wake-up unit through a serial peripheral interface; the wake-up input interface of the control unit is connected to the wake-up unit Wake-up output interface connection.

In one embodiment, the control unit sends a low power switching signal to the wake-up unit through the serial peripheral interface before sleep, instructing the wake-up unit to enter the sleep mode; the wake-up unit receives the multiple After the wake-up signal of at least one wake-up source of the wake-up source, switch from the sleep mode to the work mode, and output a wake-up trigger signal to the wake-up input interface of the control unit through the wake-up output interface; the control unit is based on the wake-up trigger signal to switch from sleep mode to active mode.

In one embodiment, the wake-up unit is in sleep mode, and the wake-up output interface of the wake-up unit outputs a high-level signal; and the wake-up unit is in a working mode, and the wake-up output interface of the wake-up unit outputs low signal.

In one embodiment, the digital acquisition chip of the vehicle is multiplexed as the wake-up unit; at least part of the input and output interfaces of the digital acquisition chip are connected to multiple wake-up sources in a one-to-one correspondence.

In one embodiment, the digital acquisition chip includes a register, and the register is used to store peripheral status signals acquired by each input and output interface.

In one embodiment, the control unit reads the value of the register through the serial peripheral interface to obtain the peripheral status of each input and output interface.

In one embodiment, the power supply pin of the digital acquisition chip is connected to a constant power supply.

In one embodiment, the interrupt input and output pins and chip select input pins of the digital acquisition chip are connected to constant power.

In one embodiment, the control unit includes at least one of a vehicle controller, a motor controller and a power management unit.

In one embodiment, the wake-up source includes a wake-up source outside the vehicle and a wake-up source inside the vehicle.

In one embodiment, the external wake-up source includes at least one of a brake wake-up source, a charging wake-up source, a collision wake-up source, and a vehicle start wake-up source.

In one embodiment, the internal wake-up source includes a CAN network wake-up source.

In a second aspect, an embodiment of the present disclosure further provides a vehicle, including the wake-up control device described in any embodiment of the first aspect.

The wake-up control device provided in the embodiments of the present disclosure includes a control unit, a wake-up unit, and multiple wake-up sources. Wherein, the wake-up unit is connected with multiple wake-up sources, and the control unit is connected with the wake-up unit. The wake-up unit has a sleep wake-up function, and the control unit sends a low-power switching signal to the wake-up unit before sleep, instructing the wake-up unit to enter the sleep mode. The wake-up unit switches from the sleep mode to the work mode after receiving the wake-up signal from the connected wake-up source, and outputs a wake-up trigger signal to the control unit, so that the control unit switches from the sleep mode to the work mode based on the wake-up trigger signal. In the embodiment of the present disclosure, by setting a wake-up unit with a sleep wake-up function, the control unit is expanded from one wake-up source channel to multiple wake-up source channels, so when waking up from multiple wake-up sources, there is no need to replace the chip with multiple wake-up input interfaces. Therefore, the compatibility can be improved and the cost can be reduced. In addition, since the wake-up unit itself has a wake-up function, after the wake-up unit wakes up, the control unit is woken up, so there is no need to monitor the wake-up signal all the time, and power consumption can also be reduced.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings that need to be used in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some of the present disclosure. Embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings.

FIG. 1 is a schematic structural diagram of a wake-up control device provided by an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of another wake-up control device provided by an embodiment of the present disclosure;

Fig. 3 is a schematic diagram of a specific example of a wake-up control device provided by an embodiment of the present disclosure.

detailed description

In order to more clearly understand the above objects, features and advantages of the present disclosure, the present disclosure will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are some of the embodiments of the present disclosure, but not all of the embodiments. The specific embodiments described here are only used to explain the present disclosure, but not to limit the present disclosure. All other embodiments obtained by persons of ordinary skill in the art based on the described embodiments of the present disclosure belong to the protection scope of the present disclosure.

In order to reduce the static power consumption of the vehicle and increase the cruising range, the control unit of the vehicle is generally set to have a sleep function. That is, enter the sleep mode when no work is needed to reduce power consumption and energy consumption; when normal work is required, switch from the sleep mode to the working mode to realize its normal operation. However, when the automobile needs many wake-up source channels, the problem of insufficient wake-up source interfaces of the control unit may be encountered. At this time, it is necessary to redesign the control unit, increase the wake-up source interface of the control unit, and connect with each wake-up source one by one, so as to receive the wake-up source signal. This will lead to the need to design control units with interfaces of different numbers of wake-up sources for different numbers of wake-up sources. Therefore, the compatibility of the control unit in the prior art is poor, and the cost of redesigning and replacing the control unit will be too high.

In view of the shortcomings of the prior art described above, an embodiment of the present disclosure provides a wake-up control device. FIG. 1 is a schematic structural diagram of a wake-up control device provided by an embodiment of the present disclosure. As shown in FIG. 1 , the embodiment of the present disclosure provides The wake-up control device includes a control unit 11 , a wake-up unit 12 and a plurality of wake-up sources 13 . Wherein, the wake-up unit 12 is connected with multiple wake-up sources 13 .

It should be noted that, the embodiment of the present disclosure does not limit the number of wake-up sources 13 , and four wake-up sources 13 are exemplarily set in FIG. 1 . Wherein, the wake-up source 13 refers to some triggering events, for example, when the vehicle meets certain triggering conditions during running, the corresponding vehicle functional unit will send a wake-up signal.

In the embodiment of the present disclosure, the wakeup unit 12 has a sleep wakeup function. Before going to sleep, the control unit 11 may, for example, send a low power switching signal to the wake-up unit 12, and then the control unit 11 enters the sleep mode again. The wake-up unit 12 enters the sleep mode after receiving the low power consumption switching signal. If the wake-up unit 12 is in the sleep mode, when the wake-up source 13 has a state change, the wake-up source 13 sends a wake-up signal, then the wake-up unit 12 switches from the sleep mode to the work mode after receiving the wake-up signal of the wake-up source 13, and outputs The wake-up trigger signal, after the control unit 11 receives the wake-up trigger signal, switches from the sleep mode to the work mode.

The wake-up unit 12 in the embodiment of the present disclosure itself has a sleep wake-up function. The wake-up unit 12 monitors the states of multiple wake-up sources 13. After receiving a wake-up signal from at least one wake-up source 13, it switches itself from the sleep mode to the work mode, and Outputting a wake-up trigger signal to instruct the control unit 11 to switch from the sleep mode to the work mode based on the wake-up trigger signal. Therefore, the control unit 11 of the embodiment of the present disclosure can realize the wake-up function of multiple wake-up sources without providing multiple one-to-one corresponding wake-up input interfaces for the multiple wake-up sources 13 . Therefore, when waking up from multiple wake-up sources, the embodiment of the present disclosure does not need to redesign or replace the chip with multiple wake-up input interfaces, and only needs to make the corresponding wake-up source 13 and wake-up unit 12 according to the number of wake-up source channels required. Just connect. Therefore, the compatibility of the control unit can be improved and the cost can be reduced. In addition, since the wake-up unit 12 itself has a sleep wake-up function, the wake-up unit 12 wakes up when detecting that the state of the wake-up source 13 changes, and then wakes up the control unit 11 . Therefore, the embodiment of the present disclosure does not need to monitor the wake-up signal all the time, and can also reduce power consumption.

FIG. 2 is a schematic structural diagram of another wake-up control device provided by an embodiment of the present disclosure. As shown in FIG. 2 , optionally, the connection between the control unit 11 and the wake-up unit 12 further includes: the control unit 11 through the serial peripheral interface SPI Connect with the wake-up unit 12. The wake-up input interface 111 of the control unit 11 is connected to the wake-up output interface 121 of the wake-up unit 12 .

The control unit 11 and the wake-up unit 12 can communicate in a serial manner to exchange information. Before going to sleep, the control unit 11 sends a low power switching signal to the wake-up unit 12 through the serial peripheral interface SPI, instructing the wake-up unit 12 to enter the sleep mode. The wake-up input interface 111 of the control unit 11 is connected to the wake-up output interface 121 of the wake-up unit 12 . After receiving the wake-up signal from the wake-up source 13 , the wake-up unit 12 switches from the sleep mode to the work mode, and outputs a wake-up trigger signal to the wake-up input interface 111 of the control unit 11 through the wake-up output interface 121 . The control unit 11 switches from the sleep mode to the work mode based on the wake-up trigger signal.

In some embodiments, the wake-up unit 12 can be set to be in sleep mode, the wake-up output interface 121 of the wake-up unit 12 outputs a high-level signal, and the wake-up unit 12 is in the working mode, and the wake-up output interface 121 of the wake-up unit 12 outputs a low-level signal. That is, when the wake-up unit 12 switches from the sleep mode to the work mode, it will generate a wake-up trigger signal in the form of a falling edge, and the wake-up input interface 111 of the control unit 11 will switch from the sleep mode to the work mode after receiving the falling edge.

In some embodiments, the digital acquisition chip of the vehicle can also be multiplexed as the wake-up unit 12 . Among them, the input and output interfaces of the digital acquisition chip in the vehicle are generally used to acquire peripheral status signals. Peripherals may be, for example, car doors, lights, and the like. The input and output interfaces of the digital acquisition chip in the vehicle are used, for example, to acquire the status of the door switch and the status of the lights. In the embodiment of the present disclosure, the original digital acquisition chip of the vehicle is used, and it is multiplexed as a wake-up unit 12, and at least part of the number of input and output interfaces of the digital acquisition chip are connected with multiple wake-up sources 13 in one-to-one correspondence for extended control. Wake-up channel for unit 11. For example, the digital acquisition chip in the vehicle has a total of 22 input and output interfaces. If the control unit 11 needs to set 9 wake-up channels, then the 9 input-output interfaces can be connected to multiple wake-up sources 13 in one-to-one correspondence. It should be noted that the embodiment of the present disclosure does not limit the number of one-to-one connections between input and output interfaces and wake-up sources 13 in the digital acquisition chip, and all or part of the number of input-output interfaces and wake-up sources 13 can be selected according to actual application conditions. One-to-one connection, so as to realize the expansion of the required number of control unit wake-up channels.

For the method of multiplexing the digital acquisition chip of the vehicle as the wake-up unit 12, before the control unit 11 sleeps, for example, a low-power switching signal can be sent to the digital acquisition chip through the serial peripheral interface SPI, so that the digital acquisition chip enters Sleep mode, and then the control unit 11 sleeps again. The digital acquisition chip has, for example, 22 input and output interfaces, and all 22 input and output interfaces can be connected to corresponding wake-up sources 13, such as brake wake-up sources, charging wake-up sources, and the like. When the state of at least one wake-up source 13 changes, the digital acquisition chip will switch from sleep mode to work mode, and the wake-up output interface 121 will switch from high level to low level, and send a signal to the control unit 11 through the wake-up input interface. A falling edge, thereby waking up the control unit 11. In this way, the control unit 11 can be expanded from one wake-up channel to 22 wake-up channels.

In some embodiments, the digital acquisition chip includes registers, and the registers store peripheral status signals acquired by each input and output interface. The digital acquisition chip includes multiple input and output interfaces, and each input and output interface corresponds to an input and output interface channel. The control unit 11 can read the value of the register through the serial peripheral interface to obtain the external connection state of each input and output interface channel, and then control and monitor the peripheral device according to the external connection state.

In some embodiments, the power supply pin of the digital acquisition chip is connected to normal power. If the power supply pin of the digital acquisition chip is connected to the power supply through other equipment (such as the control unit 11), then when other equipment (such as the control unit 11) is not working or sleeps, the digital acquisition chip will be powered off, thereby affecting the digital acquisition. The normal power supply of the chip, so the embodiment of the present disclosure sets the power supply pin of the digital acquisition chip to be connected to the normal power supply.

In some embodiments, the interrupt input and output pin INT_B and the chip select input pin CS_B of the digital acquisition chip are connected to constant power. Under normal circumstances, when the levels of INT_B and CS_B of the vehicle's digital acquisition chip change, such as from high level to low level, when a falling edge occurs, the digital acquisition chip will also enter the working mode from the sleep mode. . However, the embodiment of the present disclosure needs to wake up the digital acquisition chip only when the wake-up signal from the wake-up source 13 is detected, that is, the digital acquisition chip will enter the working mode from the sleep mode, and generate a wake-up trigger signal to wake up the control unit 11 . Therefore, in order to avoid the level changes of INT_B and CS_B other than the wake-up signal of the wake-up source 13 from causing the digital acquisition chip to wake up, thereby causing the control unit 11 to wake up, the embodiment of the present disclosure connects INT_B and CS_B of the digital acquisition chip to constant power, so that It is avoided that the level changes of INT_B and CS_B other than the wake-up signal of the wake-up source 13 cause the digital acquisition chip to wake up, thereby causing the control unit 11 to wake up.

In some embodiments, the control unit 11 includes at least one of a vehicle controller, a motor controller and a power management unit. There are many control units in the vehicle, in order to reduce power consumption, any one or more control units 11 can be selected to have a wake-up function, and the number of wake-up channels can be expanded. The control unit 11 in the embodiment of the present disclosure may be at least one of a vehicle controller, a motor controller and a power management unit.

In some embodiments, the above-mentioned wake-up source 13 may include a wake-up source outside the vehicle and a wake-up source inside the vehicle. Wherein, the external wake-up source may include, for example, at least one of a brake wake-up source, a charging wake-up source, a collision wake-up source, and a vehicle start wake-up source. The internal wake-up source may include, for example, a CAN network wake-up source and the like.

Fig. 3 is a schematic diagram of a specific example of a wake-up control device provided by an embodiment of the present disclosure. As shown in FIG. 3 , the digital acquisition chip 12 is connected to the control unit 11 through a serial peripheral interface SPI. The serial peripheral interface SPI includes the master device input/slave device output pin MISO, the master device output/slave device input pin MOSI, the serial port clock pin SCLK, and the chip select input pin CS_B. The master input/slave output pin MISO transmits data in slave mode and receives data in master mode. The master output/slave input pin MOSI transmits data in master mode and receives data in slave mode. The serial port clock pin SCLK is used as the output of the master device and the input of the slave device. The chip select input pin CS_B is an optional pin used to select the master/slave device. Its function is used as a chip select pin, so that the master device can communicate with a specific slave device independently, avoiding conflicts on the data line.

The digital acquisition chip 12 has 22 input and output interfaces in total, which are divided into 2 groups. The first group of input and output interfaces includes 8 input and output interfaces, namely SP0, SP1, SP2, SP3, SP4, SP5, SP6, and SP7. The second group of input and output interfaces includes 14 input and output interfaces, namely SG0, SG1, SG2, SG3, SG4, SG5, SG6, SG7, SG8, SG9, SG10, SG11, SG12, and SG13. Among them, select SP0, SP1, SP2, and SP3 to connect to 4 external wake-up sources 13 in one-to-one correspondence, and select SG8, SG9, SG10, SG11, and SG12 to connect to 5 internal wake-up sources 13 in one-to-one correspondence. The wake-up output interface WAKE_B of the digital acquisition chip 12 is correspondingly connected to the wake-up input interface WAKE_N of the control unit 11 .

Before the control unit 11 sleeps, the digital acquisition chip 12 is controlled to enter the sleep mode through the SPI command, and then the control unit 11 sleeps again. When the wake-up source 13 connected to the digital acquisition chip 12 changes state, the digital acquisition chip 12 switches from the sleep mode to the normal mode, and the WAKE_B pin of the digital acquisition chip 12 also switches from the high level state to the low level state, giving The WAKE_N pin of the control unit 11 inputs a falling edge, thereby waking up the control unit 11 . In this way, one wake-up source channel of the control unit 11 is expanded into nine wake-up source channels through the digital acquisition chip 12 .

In addition, the power supply of the digital acquisition chip 12 can be set to be a constant power, that is, the power pin of the digital acquisition chip 12 is connected to a constant power, so as to avoid affecting the power supply of the digital acquisition chip 12 after the control unit 11 is powered off. The pull-up power supply of the interrupt input and output pin INT_B of the digital acquisition chip 12 and the chip select input pin CS_B is a constant power supply, so that the interrupt input and output pin INT_B and the chip select input pin CS_B are connected to a constant power supply to ensure that the control unit 11 No falling edge is generated while in Sleep mode.

An embodiment of the present disclosure further provides a vehicle, including the wake-up control device described in any of the foregoing embodiments. Since the present disclosure includes the wake-up control device in any of the above embodiments, it has the same or corresponding beneficial effects as the wake-up control device in the above-mentioned embodiments. It should be noted that the vehicle provided in the embodiment of the present disclosure may also include other circuits and devices for supporting its normal operation, which is not specifically limited in this embodiment.

It should be noted that, in this document, the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element.

Those skilled in the art will understand that although some of the embodiments described herein include some features included in other embodiments but not others, combinations of features from different embodiments are meant to be within the scope of the present disclosure. And form different embodiments.

Although the embodiments of the present disclosure have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present disclosure. within the bounds of the requirements.

Claims

A wake-up control device comprising:

a control unit, a wake-up unit and multiple wake-up sources;

The wake-up unit is connected to the multiple wake-up sources; the control unit is connected to the wake-up unit;

The control unit sends a low-power switching signal to the wake-up unit before sleep, instructing the wake-up unit to enter the sleep mode; after the wake-up unit receives a wake-up signal from at least one wake-up source among the multiple wake-up sources , switch from the sleep mode to the work mode, and output a wake-up trigger signal to the control unit; the control unit switches from the sleep mode to the work mode based on the wake-up trigger signal.
The wake-up control device according to claim 1, wherein when the state of the at least one wake-up source changes, the wake-up signal corresponding to the at least one wake-up source is sent to the wake-up unit.
The wake-up control device according to claim 1 or 2, wherein the connection between the control unit and the wake-up unit further comprises: the control unit is connected to the wake-up unit through a serial peripheral interface; the wake-up of the control unit The input interface is connected with the wake-up output interface of the wake-up unit.
The wake-up control device according to claim 3, wherein the control unit sends a low-power switching signal to the wake-up unit through a serial peripheral interface before sleep, instructing the wake-up unit to enter a sleep mode; After receiving the wake-up signal of at least one wake-up source of the plurality of wake-up sources, switch from the sleep mode to the work mode, and output a wake-up trigger signal to the wake-up input interface of the control unit through the wake-up output interface; the control The unit switches from a sleep mode to an active mode based on the wake-up trigger signal.
The wake-up control device according to claim 3 or 4, wherein the wake-up unit is in a sleep mode, and the wake-up output interface of the wake-up unit outputs a high-level signal; and the wake-up unit is in a working mode, and the wake-up The wake-up output interface of the unit outputs a low level signal.
The wake-up control device according to any one of claims 1 to 5, wherein the digital acquisition chip of the vehicle is multiplexed as the wake-up unit, and at least part of the number of input and output interfaces of the digital acquisition chip are connected with the plurality of wake-up Sources are linked one-to-one.
The wake-up control device according to claim 6, wherein the digital acquisition chip includes a register, and the register is used to store peripheral status signals obtained by each input and output interface.
The wake-up control device according to claim 7, wherein the control unit reads the value of the register through the serial peripheral interface to obtain the peripheral status of each input and output interface.
The wake-up control device according to any one of claims 6 to 8, wherein the power supply pin of the digital acquisition chip is connected to a constant power supply.
The wake-up control device according to any one of claims 6 to 9, wherein the interrupt input and output pins and chip select input pins of the digital acquisition chip are connected to constant power.
The wake-up control device according to any one of claims 1 to 10, wherein the control unit includes at least one of a vehicle controller, a motor controller and a power management unit.
The wake-up control device according to any one of claims 1 to 11, wherein the wake-up source includes a wake-up source outside the vehicle and a wake-up source inside the vehicle.
The wake-up control device according to claim 12, wherein the external wake-up source includes at least one of a brake wake-up source, a charging wake-up source, a collision wake-up, and a vehicle start-up wake-up source.
The wake-up control device according to claim 12 or 13, wherein the internal wake-up source comprises a CAN network wake-up source.
A vehicle comprising the wake-up control device according to any one of claims 1 to 14.