WO2018121566A1

WO2018121566A1 - Power supply management apparatus, vehicle mobile terminal and method for reducing power consumption thereof

Info

Publication number: WO2018121566A1
Application number: PCT/CN2017/118865
Authority: WO
Inventors: 葛均辉; 李良; 潘全新
Original assignee: 北京奇虎科技有限公司
Priority date: 2016-12-29
Filing date: 2017-12-27
Publication date: 2018-07-05
Also published as: CN106671910B; CN106671910A

Abstract

A power supply management apparatus for use in a vehicle mobile terminal, a vehicle mobile terminal, and a method for reducing vehicle mobile terminal power consumption. The apparatus (100, 200) comprises a microcontroller unit (MCU) (110, 210); the MCU (110, 120) comprises an automobile on/off detecting unit (111, 211), a first power supply management unit (112, 212), a second power supply management unit (113, 213) and a timer (113, 214) timing a pre-determined time span; the automobile turn-off/turn-on detecting unit (111, 211) is configured to send a first control signal to the first power supply management unit (112, 212) and the second power supply management unit (113, 213) when it is detected that the automobile is turned off; after receiving the first control signal, the first power supply management unit (112, 212) controls a first type of functional module of a vehicle mobile terminal to power off; after receiving the first control signal, the second power supply management unit (113, 213) starts the timer (114, 214), and when a set time is reached, controls a second type of functional module of the vehicle mobile terminal to power off, so as to prevent the vehicle mobile terminal from emptying the power of a vehicle battery, ensuring that the automobile can operate normally.

Description

Power management device, vehicle mobile terminal and method for saving power consumption thereof

Technical field

The present invention relates to the field of automobile technology, and in particular, to a power management device for a vehicle-mounted mobile terminal, a vehicle-mounted mobile terminal, and a method for saving power consumption of the vehicle-mounted mobile terminal.

Background technique

In the current social life, some of the devices in the car or the in-vehicle mobile terminal require the battery inside the car to supply power, for example, the car's ACC ignition device, the vehicle driving recorder, and the like. In the prior art driving recorder, in order to realize the monitoring of the surrounding environment when the vehicle stops driving, the vehicle is kept open after the vehicle is turned off, which requires the battery inside the vehicle to continuously supply power to the driving recorder. If the car is not used for a short period of time, there is no problem, but if the car is not used for a long time (such as a user traveling for a month, park the car in the garage for up to a month), and the driving recorder keeps it during this time. When it is turned on, it will gradually consume the power in the battery, which will cause the battery to be exhausted, which will cause the car to fail to start normally and affect the normal use of the car.

Summary of the invention

In view of the above problems, the present invention has been made in order to provide a power management apparatus, an in-vehicle mobile terminal, and a method of saving power consumption of an in-vehicle mobile terminal for an in-vehicle mobile terminal that overcome the above problems or at least partially solve the above problems.

According to an aspect of the present invention, a power management apparatus for an in-vehicle mobile terminal is provided, wherein the apparatus includes a micro control unit MCU; the MCU includes: a vehicle flameout/ignition detecting unit, a first power management unit, a second power management unit and a timer whose timing is a preset time;

The vehicle flameout/ignition detecting unit is adapted to send a first control signal to the first power management unit and the second power management unit when detecting the vehicle stalling;

The first power management unit controls the first type of function module of the in-vehicle mobile terminal to be powered off after receiving the first control signal;

The second power management unit starts a timer after receiving the first control signal, and controls the second type of function module of the vehicle-mounted mobile terminal to be powered off when the timer reaches the timing time, so as to prevent the vehicle-mounted mobile terminal from exhausting the power of the vehicle battery.

According to still another aspect of the present invention, a method of saving power consumption of an in-vehicle mobile terminal is provided, wherein the method comprises:

Adding a micro control unit MCU to the vehicle mobile terminal;

The MMU controls the first type of function module of the in-vehicle mobile terminal to be powered off when detecting that the car is turned off;

And, after the preset time of the vehicle is turned off, the MCU controls the second type of function module of the vehicle-mounted mobile terminal to be powered off, so as to prevent the vehicle-mounted mobile terminal from exhausting the power of the vehicle battery.

The present invention provides a computer program comprising computer readable code that, when executed on a computing device, causes the computing device to perform the method of saving power consumption of the in-vehicle mobile terminal as described above.

The invention also provides a computer readable medium storing a computer program as described above.

According to the technical solution of the present invention, a power control device sets a micro control unit CPU, and when detecting that the car is turned off, sends a first control signal to the first power management unit and the second power management unit in the micro control unit CPU; After receiving the first control signal, the first power management unit controls the first type of function module of the in-vehicle mobile terminal to be powered off, and the second power management unit starts the timer after receiving the first control signal, and the timer reaches the timing time. When the second type of function module of the vehicle mobile terminal is controlled to be powered off, the vehicle mobile terminal is prevented from exhausting the power of the vehicle battery. It can be seen that the invention can automatically control the power-off of the function modules of the vehicle-mounted mobile terminal in the case that the automobile is not used for a long time, prevent the waste of the power of the automobile battery, and exhaust the power, so as to ensure that the automobile can be used normally.

The above description is only an overview of the technical solutions of the present invention, and the above-described and other objects, features and advantages of the present invention can be more clearly understood. Specific embodiments of the invention are set forth below.

DRAWINGS

Various other advantages and benefits will become apparent to those skilled in the art from a The drawings are only for the purpose of illustrating the preferred embodiments and are not to be construed as limiting. Throughout the drawings, the same reference numerals are used to refer to the same parts. In the drawing:

1 shows a schematic diagram of a power management apparatus for a vehicle-mounted mobile terminal according to an embodiment of the present invention;

2 is a schematic diagram of a power management apparatus for a vehicle-mounted mobile terminal according to another embodiment of the present invention;

FIG. 3 is a schematic diagram of a vehicle-mounted mobile terminal according to another embodiment of the present invention; FIG.

4 illustrates a flow chart of a method of saving power consumption of an in-vehicle mobile terminal in accordance with one embodiment of the present invention;

Figure 5 shows schematically a block diagram of a computing device for performing the method according to the invention;

Fig. 6 schematically shows a storage unit for holding or carrying program code implementing the method according to the invention.

Specific embodiment

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the embodiments of the present invention have been shown in the drawings, the embodiments Rather, these embodiments are provided so that this disclosure will be more fully understood and the scope of the disclosure will be fully disclosed.

1 shows a schematic diagram of a power management apparatus for a vehicle-mounted mobile terminal in accordance with one embodiment of the present invention. As shown in FIG. 1 , the power management apparatus 100 for an in-vehicle mobile terminal includes: a micro control unit MCU 110; the MCU 110 includes: a vehicle flameout/ignition detecting unit 111, a first power management unit 112, a second power management unit 113, and The timer time is the timer 114 of the preset time.

The vehicle flameout/ignition detecting unit 111 is adapted to transmit a first control signal to the first power management unit and the second power management unit when the vehicle is turned off.

The automobile flameout/ignition detecting unit 111 monitors the ACC ignition switch of the automobile in real time, and when it detects that the vehicle is turned off, sends the first control signal of the automobile to the first power management unit 112 and the second power management unit 113.

The first power management unit 112 controls the first type of function module of the in-vehicle mobile terminal to be powered off after receiving the first control signal.

Because some car mobile terminals will continue to be turned on after the car is turned off, and then consume the car battery power, but after the car is turned off, the car mobile terminal may only use some functions in the car mobile terminal, that is, the necessary functions. For example, the driving recorder is turned on after the car is turned off to monitor the surrounding environment of the car in the case of non-use, in order to prevent the occurrence of damage or deliberate damage, resulting in economic loss of the owner, for example, by other vehicles. The scraping or being maliciously damaged. At this time, only the recording function of the driving recorder is utilized, and other functions, such as a screen display, a microphone, and the like, are not required, and in this case, the driving recorder is still turned on. The necessary function modules will cause a waste of car battery power.

Therefore, after the first power management unit 112 receives the first control signal, the first type of function module of the in-vehicle mobile terminal is controlled to be powered off. The first type of function module here may be a function module that is not required to be turned on in the state in which the vehicle mobile terminal is turned off.

The second power management unit 113 starts the timer 114 after receiving the first control signal, and controls the second type of function module of the vehicle-mounted mobile terminal to be powered off when the timer reaches the timing time, so as to prevent the vehicle-mounted mobile terminal from exhausting the vehicle battery. Electricity.

The car is in a state of long-term flameout (for example, if the user travels for one month and parks the car in the garage for up to one month), if the car mobile terminal is always on, the battery of the car will be exhausted. Therefore, after a period of time, the car is still in an extinguished state, and the second type of function module of the in-vehicle mobile terminal needs to be powered off to prevent the in-vehicle mobile terminal from exhausting the amount of the car battery. After the second function module is powered off, the on-board mobile terminal may be completely turned off, or the function of retaining part of the power consumption may be reserved.

A timer time is stored in advance in the timer 114. The timing time here can also be set as needed, for example, 18h. When the first control signal is sent for 18h, the car is still in a flameout state, then the second type of function module of the vehicle mobile terminal is directly controlled to be powered off to prevent the vehicle from being turned off. The mobile terminal runs out of battery power.

It should be noted that the types of the first function module and the second function module are not specifically limited, and may be set as needed. For example, when the car is turned off, it is only necessary to monitor the ambient sound through the driving recorder. Then the microphone of the driving recorder belongs to the second functional module and needs to be powered off at the end; when the car is turned off, only the driving recorder is needed to obtain the surrounding environment. The video image of the driving recorder, then the microphone of the driving recorder belongs to the first function module, and needs to be powered off first.

It should also be noted that the power consumption of the MCU in the power management apparatus of the present invention is small, which is much smaller than the power consumption of the in-vehicle mobile terminal. For example, staying within 5 mA will not exhaust the car battery even if it is not used for a month.

It can be seen that the invention can automatically control the power-off of the function modules of the vehicle-mounted mobile terminal in the case that the automobile is not used for a long time, prevent the waste of the power of the automobile battery, and exhaust the power, so as to ensure that the automobile can be used normally.

In an embodiment of the invention, the first type of functional module of the in-vehicle mobile terminal comprises one or more of the following: a screen; a speaker; a microphone.

In an embodiment of the invention, the second type of functional module of the in-vehicle mobile terminal comprises: a CPU. Powering off the CPU means that the car mobile terminal is completely shut down, no longer consuming the battery power of the car, and there is no shortage of car battery power.

The first functional module and the second functional module in the above embodiments are only one specific embodiment of the present invention. The types specifically included in the first function module and the second function module are not specifically limited herein, and may be set according to requirements.

Then, when the car is fired again, there is no need to consider the case where the lighting of the car battery is exhausted by the in-vehicle mobile terminal, and the functional modules that need to be powered off after the car is turned off are re-powered. Therefore, in one embodiment of the present invention, the vehicle flameout/ignition detecting unit 111 is further adapted to transmit a second control signal to the first power management unit and the second power management unit upon detecting the ignition of the vehicle.

The first power management unit 112 is adapted to resume power supply of the first type of function module of the in-vehicle mobile terminal after receiving the second control signal.

The second power management unit 113 restores the power supply of the second type of functional module of the in-vehicle mobile terminal after receiving the second control signal.

2 is a schematic diagram of a power management apparatus for an in-vehicle mobile terminal in accordance with another embodiment of the present invention. As shown in FIG. 2, the power management device 200 for an in-vehicle mobile terminal includes a micro control unit MCU 210. The micro control unit MCU 210 includes a car ignition/ignition detecting unit 211, a first power management unit 212, and a second power management unit 213. And a timer 214, a time completion unit 215, and a timer 216 whose timing time is a preset time. The automobile flameout/ignition detecting unit 211, the first power management unit 212, the second power management unit 213, and the timer 214 whose timing time is a preset time and the automobile flameout/ignition detecting unit 111 shown in FIG. The power management unit 112, the second power management unit 113, and the timer 114 whose timing is a preset time have the same functions, and the same portions will not be described herein.

The vehicle flameout/ignition detecting unit 211 is further adapted to transmit a first control signal to the time completion unit when detecting the vehicle stalling; and further adapted to send the second to the time completion unit when the vehicle ignition is detected control signal.

The time completion unit 215 is adapted to record the time of the flameout time when the first control signal is received, and start the timer 216 to start counting from 0; and to adapt to the time of the flameout time when the second control signal is received The time of the timer 216 is calculated as the time of the ignition timing of the car, and the time of the ignition timing of the car is output to the system time unit of the in-vehicle mobile terminal.

The time display in the vehicle mobile terminal is often to obtain the network time in real time through the wireless signal, which requires the car to be driven in the signaled area. If the car enters the underground garage and is parked in the underground garage, then when the car is turned off, when it is turned on again, because the wireless signal in the underground garage is not good or there is no signal, the car mobile terminal will not be able to get the correct system time, maybe Only the factory time of the mobile terminal is displayed, for example, the driving recorder. Then the video image captured by the driving recorder without time calibration cannot be used as evidence in the accident processing.

In order to prevent this from happening, start timing when the car is turned off, in case the time is lost when the car is ignited again. When the car is ignited again, the time of the time is added to the time when the car is turned off, the time completion operation is performed, and the time after completion is output to the system time unit of the vehicle mobile terminal, and the vehicle mobile terminal can pass the MCU. The system time unit gets the correct time. For example, the time when the flameout is 9:00 and the time of the timer is 4 hours, then the ignition time of the car is 13:00.

When the car drives out of the underground garage without signal, the exact time can be obtained through the wireless signal, and then the vehicle mobile terminal will take the time information obtained by GPS or the network as the standard.

It can be seen that the present invention can also enable the in-vehicle mobile terminal to acquire the correct system time, ensure the availability of information captured by the in-vehicle mobile terminal, and enhance the user experience, in the case that the vehicle cannot obtain the network time without the wireless signal.

Usually, the in-vehicle mobile terminal needs to perform the method shown in FIG. 1 to obtain the system time, which should be the time information that cannot be obtained through GPS or the network. Therefore, when the system time unit of the in-vehicle mobile terminal cannot obtain the time information through the GPS or the network, the time output by the time completion unit 215 is taken as the system time, and when the time information can be acquired through the GPS or the network, the MCU is not needed. The time of the output, the time information obtained is taken as the system time.

In one embodiment of the present invention, the time completion unit 215 is adapted to accumulate the time of the timer at the time of the flameout time to obtain the time of the ignition timing of the car. For example, the time for the flameout is 14:00 and the time for the timer is 5 hours, then the ignition time of the car is 19:00.

FIG. 3 shows a schematic diagram of an in-vehicle mobile terminal according to another embodiment of the present invention. As shown in FIG. 3, the in-vehicle mobile terminal 300 includes a power management device 310 as shown in FIG. 1 or 2.

In an embodiment of the invention, the in-vehicle mobile terminal is a driving recorder or a smart rearview mirror.

4 shows a flow chart of a method of saving power consumption of an in-vehicle mobile terminal in accordance with one embodiment of the present invention. As shown in FIG. 4, the method includes:

Step S410, adding a micro control unit MCU to the in-vehicle mobile terminal.

In step S420, the MUC controls the first type of function module of the in-vehicle mobile terminal to be powered off when detecting that the car is turned off. And, after the preset time of the vehicle is turned off, the MCU controls the second type of function module of the vehicle mobile terminal to be powered off, so as to prevent the vehicle-mounted mobile terminal from exhausting the power of the vehicle battery.

Therefore, after the first power management unit 112 receives the first control signal, the first type of function module of the in-vehicle mobile terminal is controlled to be powered off. The first type of functional module herein may be a non-essential function module of the vehicle-mounted mobile terminal in a state in which the vehicle is turned off.

It should also be noted that the power consumption of the MCU in the power management apparatus of the present invention is small, which is much smaller than the power consumption of the in-vehicle mobile terminal. For example, staying within 5 mA will prevent the car from running out of battery power even if it is not used for a month.

Then, when the car is fired again, there is no need to consider the case where the lighting of the car battery is exhausted by the in-vehicle mobile terminal, and the functional modules that need to be powered off after the car is turned off are re-powered. Therefore, in an embodiment of the present invention, the method shown in FIG. 4 further includes: the MCU recovering power supply of each functional module of the in-vehicle mobile terminal when detecting the ignition of the automobile.

In one embodiment of the invention, the in-vehicle mobile terminal is a driving recorder or a smart rearview mirror.

In an embodiment of the invention, the method shown in FIG. 4 further includes:

When the MUC detects that the car is off, it records the time of the flameout and starts the timer from 0.

In order to prevent the above situation from occurring, the timing is started when the car is turned off, in case the time is lost when the car is ignited again.

When detecting the ignition of the car, the MCU calculates the time of the ignition timing of the car according to the time of the flameout time and the time of counting the timer, and outputs the time of the ignition timing of the car to the system time unit of the vehicle mobile terminal.

When the car is ignited again, the time of the time is added to the time when the car is turned off, the time completion operation is performed, and the time after completion is output to the system time unit of the vehicle mobile terminal, and the vehicle mobile terminal can pass the system of the MCU. The time unit gets the right time. For example, the time for the flameout is 9:00, and the time for the timer is 4 hours, then the ignition time of the car is 13:00.

When the car is taken out of the underground garage without signal, the exact time can be obtained through the wireless signal, and the vehicle mobile terminal will take the time information acquired by GPS or the network as the standard.

Usually, the in-vehicle mobile terminal needs to perform the above method to obtain the system time, which should be the time information that cannot be obtained through GPS or the network. Therefore, when the system time unit of the in-vehicle mobile terminal cannot obtain the time information through the GPS or the network, the time output by the MCU is taken as the system time, and when the time information can be acquired through the GPS or the network, the acquired time information is taken as the system time. .

In an embodiment of the present invention, the time of the ignition timing of the automobile is calculated according to the time of the flameout time and the time of counting the timer, and the time of counting the timer is accumulated at the time of the flameout time to obtain the time of the ignition timing of the automobile. For example, the time for the flameout is 14:00 and the time for the timer is 5 hours, then the ignition time of the car is 19:00.

In summary, according to the technical solution of the present invention, a micro control unit CPU is set in the power management device, and when the car is turned off, the first power management unit and the second power management unit in the micro control unit CPU are sent. a first control signal; the first power management unit controls the first type of function module of the in-vehicle mobile terminal to be powered off after receiving the first control signal, and the second power management unit starts the timer after receiving the first control signal, When the timer reaches the timing time, the second type of function module of the vehicle-mounted mobile terminal is controlled to be powered off, so as to prevent the vehicle-mounted mobile terminal from exhausting the power of the vehicle battery. It can be seen that the invention can automatically control the power-off of the function modules of the vehicle-mounted mobile terminal in the case that the automobile is not used for a long time, prevent the waste of the power of the automobile battery, and exhaust the power, so as to ensure that the automobile can be used normally.

It should be noted:

The algorithms and displays provided herein are not inherently related to any particular computer, virtual device, or other device. Various general purpose devices can also be used with the teaching based on the teachings herein. The structure required to construct such a device is apparent from the above description. Moreover, the invention is not directed to any particular programming language. It is to be understood that the invention may be embodied in a variety of programming language, and the description of the specific language has been described above in order to disclose the preferred embodiments of the invention.

"an embodiment," or "an embodiment," or "an embodiment," In addition, it is noted that the phrase "in one embodiment" is not necessarily referring to the same embodiment.

In the description provided herein, numerous specific details are set forth. However, it is understood that the embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of the description.

Similarly, the various features of the invention are sometimes grouped together into a single embodiment, in the above description of the exemplary embodiments of the invention, Figure, or a description of it. However, the method disclosed is not to be interpreted as reflecting the intention that the claimed invention requires more features than those recited in the claims. Rather, as the following claims reflect, inventive aspects reside in less than all features of the single embodiments disclosed herein. Therefore, the claims following the specific embodiments are hereby explicitly incorporated into the embodiments, and each of the claims as a separate embodiment of the invention.

Those skilled in the art will appreciate that the modules in the devices of the embodiments can be adaptively changed and placed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and further they may be divided into a plurality of sub-modules or sub-units or sub-components. In addition to such features and/or at least some of the processes or units being mutually exclusive, any combination of the features disclosed in the specification, including the accompanying claims, the abstract and the drawings, and any methods so disclosed, or All processes or units of the device are combined. Each feature disclosed in this specification (including the accompanying claims, the abstract and the drawings) may be replaced by alternative features that provide the same, equivalent or similar purpose.

In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features that are included in other embodiments and not in other features, combinations of features of different embodiments are intended to be within the scope of the present invention. Different embodiments are formed and formed. For example, in the following claims, any one of the claimed embodiments can be used in any combination.

The various component embodiments of the present invention may be implemented in hardware, or in a software module running on one or more processors, or in a combination thereof. It will be understood by those skilled in the art that a microprocessor or a digital signal processor (DSP) may be used in practice to implement some or all of the power management device and the in-vehicle mobile terminal for the in-vehicle mobile terminal according to an embodiment of the present invention. Some or all of the features of the part. The invention can also be implemented as a device or device program (e.g., a computer program and a computer program product) for performing some or all of the methods described herein. Such a program implementing the invention may be stored on a computer readable medium or may be in the form of one or more signals. Such signals may be downloaded from an Internet website, provided on a carrier signal, or provided in any other form.

For example, Figure 5 shows a block diagram of a computing device for performing the method in accordance with the present invention. The computing device conventionally includes a processor 510 and a computer program product or computer readable medium in the form of a memory 520. The memory 520 may be an electronic memory such as a flash memory, an EEPROM (Electrically Erasable Programmable Read Only Memory), an EPROM, a hard disk, or a ROM. Memory 520 has a storage space 530 that stores program code 531 for performing any of the method steps described above. For example, the storage space 530 for storing program code may separately store respective program codes 531 for implementing various steps in the above method. The program code can be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, compact disks (CDs), memory cards or floppy disks. Such a computer program product is typically a portable or fixed storage unit such as that shown in FIG. The storage unit may have storage segments, storage spaces, and the like that are similarly arranged to memory 520 in the computing device of FIG. The program code can be compressed in an appropriate form. Typically, the storage unit stores computer readable program code 531' for performing the steps of the method according to the present invention, ie program code readable by a processor such as 510, when the program code is run by the computing device, resulting in The computing device performs the various steps in the methods described above.

It is to be noted that the above-described embodiments are illustrative of the invention and are not intended to be limiting, and that the invention may be devised without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as a limitation. The word "comprising" does not exclude the presence of the elements or steps that are not recited in the claims. The word "a" or "an" The invention can be implemented by means of hardware comprising several distinct elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means can be embodied by the same hardware item. The use of the words first, second, and third does not indicate any order. These words can be interpreted as names.

In addition, it should be noted that the language used in the specification has been selected for the purpose of readability and teaching, and is not intended to be construed or limited. Therefore, many modifications and changes will be apparent to those skilled in the art without departing from the scope of the invention. The disclosure of the present invention is intended to be illustrative, and not restrictive, and the scope of the invention is defined by the appended claims.

Claims

A power management apparatus for a vehicle-mounted mobile terminal, wherein the apparatus includes a micro control unit MCU; the MCU includes: a vehicle flameout/ignition detection unit, a first power management unit, a second power management unit, and a timing time a preset time timer;

The vehicle flameout/ignition detecting unit is adapted to send a first control signal to the first power management unit and the second power management unit when detecting the vehicle stalling;

The first power management unit is adapted to control the first type of function module of the in-vehicle mobile terminal to be powered off after receiving the first control signal;

The second power management unit is adapted to start a timer after receiving the first control signal, and control the second type of function module of the vehicle-mounted mobile terminal to be powered off when the timer reaches the timing time, so as to prevent the vehicle-mounted mobile terminal from exhausting the vehicle battery. Electricity.
The power management apparatus according to claim 1, wherein the first type of function module of the in-vehicle mobile terminal comprises one or more of the following:

screen;

horn;

microphone.
The power management device of claim 1, wherein the second type of functional module of the in-vehicle mobile terminal comprises:

CPU.
The power management device according to claim 1, wherein

The vehicle flameout/ignition detecting unit is further adapted to send a second control signal to the first power management unit and the second power management unit when the vehicle is detected to be ignited;

The first power management unit is adapted to resume power supply of the first type of function module of the in-vehicle mobile terminal after receiving the second control signal;

The second power management unit is adapted to resume power supply of the second type of function module of the in-vehicle mobile terminal after receiving the second control signal.
The power management device of claim 1, wherein the MCU further comprises: a time completion unit and a timer;

The vehicle flameout/ignition detecting unit is further adapted to transmit a first control signal to the time completion unit when detecting the vehicle stalling; and further adapted to transmit to the time completion unit when the vehicle ignition is detected Two control signals;

The time completion unit is adapted to record the time of the flameout time when the first control signal is received, and start the timer to start from 0; and to adapt to the time of the flameout time when the second control signal is received And the timer time of the timer calculates the time of the ignition timing of the automobile, and outputs the time of the ignition timing of the automobile to the system time unit of the vehicle mobile terminal;

The system time unit of the in-vehicle mobile terminal uses the time output by the time completion unit as the system time when the time information cannot be acquired through the GPS or the network, and the time information acquired when the time information can be acquired through the GPS or the network. As system time.
The apparatus according to claim 5, wherein

The time completion unit is adapted to accumulate the time of the timer at the time of the flameout time to obtain the time of the ignition timing of the car.
An in-vehicle mobile terminal, wherein the in-vehicle mobile terminal comprises the power management device according to any one of claims 1-6.
The in-vehicle mobile terminal of claim 7, wherein the in-vehicle mobile terminal is a driving recorder or a smart rearview mirror.
A method for saving power consumption of an in-vehicle mobile terminal, wherein the method comprises:

Adding a micro control unit MCU to the vehicle mobile terminal;

The MMU controls the first type of function module of the in-vehicle mobile terminal to be powered off when detecting that the car is turned off;

And, after the preset time of the vehicle is turned off, the MCU controls the second type of function module of the vehicle-mounted mobile terminal to be powered off, so as to prevent the vehicle-mounted mobile terminal from exhausting the power of the vehicle battery.
The method of claim 9, wherein the first type of functional module of the in-vehicle mobile terminal comprises one or more of the following:

screen;

horn;

microphone.
The method of claim 9, wherein the second type of functional module of the in-vehicle mobile terminal comprises:

CPU.
The method of claim 9 wherein the method further comprises:

The MCU restores power supply of each functional module of the vehicle-mounted mobile terminal when detecting the ignition of the automobile.
The method of claim 9 wherein

The vehicle-mounted mobile terminal is a driving recorder or a smart rearview mirror.
The method of any of claims 9-13, wherein the method further comprises:

The MMU records the time of the flameout moment when detecting the vehicle stalling, and starts the timer to start from 0;

When detecting the ignition of the automobile, the MCU calculates the time of the ignition timing of the automobile according to the time of the flameout time and the timing of the timer, and outputs the time of the ignition timing of the automobile to the system time unit of the vehicle mobile terminal;

The system time unit of the in-vehicle mobile terminal uses the time output by the MCU as the system time when the time information cannot be acquired through the GPS or the network, and when the time information can be acquired through the GPS or the network, the acquired time information is used as the time information. system time.
The method according to claim 14, wherein the time of the ignition timing of the automobile is calculated based on the time of the flameout timing and the timing of the timer,

The time of the timer is accumulated at the time of the flameout time, and the time of the ignition timing of the car is obtained.
A computer program comprising computer readable code, when said computer readable code is run on a computing device, causing said computing device to perform a function of saving an in-vehicle mobile terminal according to any one of claims 9-15 The method of consumption.
A computer readable medium storing the computer program of claim 16.