A vehicle power management method

Abstract

The present application belongs to the technical field of vehicle battery management, and specifically provides a vehicle power management method, which comprises the following steps: receiving vehicle state information, positioning a current mode state, matching a preset mode switching condition according to the vehicle state information, and switching to a preset mode corresponding to the preset mode condition; wherein the preset mode comprises a working mode, a standby mode, a transition mode, a pre-sleep mode, a sleep mode and a shutdown mode. Through the management of six power states of the state machine, the power-down process gradually realizes the power-down of the modules, the current gradually decreases, and except for the power preservation part of the fast start process, the other parts are powered down to reduce the static current, thereby avoiding the risk of power feeding.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vehicle battery management, and particularly relates to a vehicle power management method. BACKGROUND

[0002] The vehicle microcontroller unit (MCU) is mainly responsible for power control management. When the host is powered off, the MCU detects the CAN (Controller Area Network) sleep signal and notifies the state of charge (SOC) to enter the STR mode (Suspend To RAM). After receiving the notification, the SOC performs application sleep and kernel sleep and suspends the process. After the SOC sleeps, it feeds back to the MCU that the sleep is completed. The MCU controls the shutdown of peripheral power, and then the MCU enters self-sleep and is in a wake-up waiting state. At this time, the dynamic memory is live, and the keep-alive application process is running.

[0003] Generally, after the automobile host is powered on, the hardware module is first woken up, and then the control program is started to initialize the operating system kernel and user-level process. After the initialization is completed, the display device can enter the main system to provide user interaction. In this process, manufacturers add a boot animation to prevent boredom when waiting for booting. In the prior art, it usually takes a long time to start the host again after entering the standby state. SUMMARY

[0004] To solve the above problems, the present application provides a vehicle power management method, which gradually powers down the modules during power down, stores all system behavior data before the host enters standby in the storage memory, and when the host is started again, it only takes about 2-3 seconds to restore the data saved in the memory to the state before starting. The purpose of the present application is achieved through the following technical solutions:

[0005] The present application provides a vehicle power management method, which includes: receiving vehicle state information, positioning the current mode state, matching the preset mode switching condition according to the vehicle state information, and switching to the preset mode corresponding to the preset mode condition. The method steps include: working mode, standby mode, transition mode, pre-sleep mode, sleep mode and shutdown mode.

[0006] Further, if the current mode state is the working mode, a first preset mode switching condition is matched to switch to the standby mode; the first preset mode switching condition includes one of a first sub-condition, a second sub-condition or a third sub-condition; the first sub-condition includes receiving a whole vehicle shutdown signal interacted in a first manner; the second sub-condition includes receiving an ignition switch off signal and an auxiliary driving shutdown signal; the third sub-condition includes that a duration after receiving the ignition switch off signal exceeds a first preset start waiting time t0 and a vehicle start signal is not received. Preferably, the first preset start waiting time is 20 minutes to 40 minutes, and preferably, the first preset start waiting time is 30 minutes. Preferably, the first interaction manner is a short-time trigger interaction manner, such as a manner of pressing the power button for not more than 1 s when the whole vehicle is started.

[0007] Further, if the current mode state is the standby mode, a second preset mode switching condition is matched to switch to the transition mode; the second preset mode switching condition includes that a current standby mode duration exceeds a first threshold t1 and a vehicle start signal is not received. The first threshold t1 is set to 5 s to 15 s, and preferably, the first threshold t1 is set to 10 s.

[0008] Further, the transition mode includes a first transition mode and a second transition mode; the second preset mode switching condition includes a fourth sub-condition and a fifth sub-condition; the standby mode matches the fourth sub-condition to enter the first transition mode, and the fourth sub-condition includes that the standby mode duration exceeds the first threshold t1 and an ignition switch on signal is received; the standby mode matches the fifth sub-condition to enter the second transition mode, and the fifth sub-condition includes that the standby mode duration exceeds the first threshold t1 and an ignition switch off signal is received; and an ignition switch off signal is received in the first transition mode to switch to the second transition mode.

[0009] Further, if the current mode state is the transition mode, a pre-start preset mode switching condition is matched to switch to the standby mode, and a start preset mode condition is matched to switch to the working mode; the pre-start preset mode condition includes receiving an ignition switch on signal or an auxiliary driving switch on signal interacted in a first manner; and the start preset mode condition includes receiving a whole vehicle start signal, an ignition switch on signal or an auxiliary driving switch on signal interacted in a second manner. The second interaction manner is preferably a long-press interaction manner, such as a manner of pressing the power button for more than 1 s when the whole vehicle is started.

[0010] Further, if the current mode state is the transition mode, a third preset mode switching condition is matched to switch to a pre-sleep mode; the third preset mode switching condition includes that a first transition mode duration exceeds a second threshold t2 or a second transition mode duration exceeds a second preset start waiting time t4, and a vehicle start signal is not received.

[0011] Further, if the current mode state is the pre-sleep mode, a fourth preset mode switching condition is matched to switch to the sleep mode; the fourth preset mode switching condition comprises receiving a vehicle network sleep signal.

[0012] Further, if the current mode state is the sleep mode, a fifth preset mode switching condition is matched to switch to the shutdown mode; the fifth preset mode switching condition comprises that the sleep state lasts for more than a third threshold t3. Preferably, the third threshold t3 is 48h-148h.

[0013] Further, if the current mode state is the pre-sleep mode, the sleep mode or the shutdown mode, a sixth preset mode switching condition is matched to switch to the transition mode; the sixth preset mode switching condition comprises receiving a network wake-up signal.

[0014] Further, if the current mode state is the sleep mode, a seventh preset mode switching condition is matched to restart the shutdown at a predetermined time; the seventh preset mode switching condition comprises that the number of times of starting the engine exceeds a preset number threshold or the system memory is lower than a preset memory threshold, and the vehicle is in the sleep mode at a predetermined restart time point. The preset number threshold is 20-40 times, preferably, the preset memory threshold is set to 200M-400M, preferably, set to 300M; the preset number threshold is 25 times; the predetermined restart time point is set to between 1am and 4am, preferably, set to 2am.

[0015] The present application has the advantages that: the six power states of the state machine are managed, and the conversion conditions and logic, the abnormal processing mechanism, each state machine corresponds to the SOC internal module and the live condition of the peripheral SPI (Serial Peripheral Interface), and the power-down process gradually realizes the module power-down, the current gradually reduces, except for the power protection part of the fast start process, the other parts are all powered down to reduce the static current, and the risk of power supply is avoided. When the host is powered on, the process protection recovers very quickly, the picture can be recovered within 3s, and can be restored to the state before the user shuts down, greatly improving the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0016] For better understanding of the above and other objects, features, advantages and functions of the present application, reference can be made to the embodiments shown in the drawings. The same reference signs in the drawings refer to the same components. Those skilled in the art should understand that the drawings are intended to illustrate the preferred embodiments of the present application, and have no limiting effect on the scope of the present application, and the components in the drawings are not drawn to scale.

[0017] Figure 1 The power management control timing diagram of the present application is shown;

[0018] Figure 2 Fig. 2 shows a state machine diagram of the power management method in the method of embodiment 2 of the present application;

[0019] Figure 3 Fig. 3 shows a flow diagram of the silent reset in the method of embodiment 3 of the present application. DETAILED DESCRIPTION

[0020] Exemplary embodiments of the present disclosure are described herein with reference to the accompanying drawings in order to be able to understand various details of the embodiments of the present disclosure and to implement the same. It should be noted that the exemplary embodiments described herein are merely some of the embodiments of the present disclosure, and various changes and modifications can be made thereto without departing from the scope and spirit of the present disclosure. Also, descriptions of known functions and configurations incorporated herein are omitted for clarity and conciseness.

[0021] The term "include" and its variations are intended to cover a non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a list of elements is not necessarily limited to those elements, but can include other elements not expressly listed or inherent to such process, method, system, product, or apparatus. Unless otherwise defined, the term "or" means "and / or". The term "based on" means "based, at least in part, on". The terms "one example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "a first", "a second", etc. can refer to different or the same objects. Other explicit or implicit definitions can also be included below.

[0022] To at least partially address one or more of the above-mentioned problems and other potential problems, embodiments of the present disclosure propose a vehicle power management method. Figure 1 Fig. 1 shows a power management control timing diagram of the present application.

[0023] Embodiment 1:

[0024] The present application provides a vehicle power management method, which comprises: receiving vehicle state information, positioning the current mode state, matching the preset mode switching condition according to the vehicle state information, and switching to the preset mode corresponding to the preset mode condition; wherein the preset mode includes working mode, standby mode, transition mode, pre-sleep mode, sleep mode and shutdown mode.

[0025] More specifically, if the current mode state is the working mode, the first preset mode switching condition is matched to switch to the standby mode; the first preset mode switching condition includes one of a first sub-condition, a second sub-condition or a third sub-condition; the first sub-condition includes receiving a whole vehicle shutdown Power key off (0) in a first interaction manner; the second sub-condition includes receiving an ignition switch KL15 off and an auxiliary driving KLS shutdown signal; the third sub-condition includes receiving an ignition switch off signal and a vehicle start signal is not received after a duration exceeding a first preset start waiting time t0. Preferably, the first preset start waiting time t0 is set to 20 minutes to 40 minutes, and preferably, the first preset start waiting time t0 is set to 30 minutes. Preferably, the first interaction manner is a short-time trigger interaction manner, such as a manner of pressing a corresponding touch key for not more than a preset time, for example, pressing the power key for not more than 1 s when the whole vehicle is started.

[0026] If the current mode state is the standby mode, the second preset mode switching condition is matched to switch to the transition mode; the second preset mode switching condition includes a current standby mode duration exceeding a first threshold t1 without receiving a vehicle start signal. The first threshold t1 is set to 5 s to 15 s, and preferably, the first threshold t1 is set to 10 s.

[0027] In a preferred embodiment, the transition mode includes a first transition mode and a second transition mode; the second preset mode switching condition includes a fourth sub-condition and a fifth sub-condition; the fourth sub-condition is matched to enter the first transition mode, and the fourth sub-condition includes a standby mode duration exceeding the first threshold t1 and receiving an ignition switch on signal; the fifth sub-condition is matched to enter the second transition mode, and the fifth sub-condition includes a standby mode duration exceeding the first threshold t1 and receiving an ignition switch off signal; receiving an ignition switch off signal in the first transition mode switches to the second transition mode.

[0028] If the current mode state is the transition mode, the pre-start preset mode switching condition is matched to switch to the standby mode, and the start preset mode switching condition is matched to switch to the working mode; the pre-start preset mode switching condition includes receiving a signal of the ignition switch opening KL15 open (0) or the auxiliary driving switch opening KLS open (0) in the first interaction mode; the start preset mode switching condition includes receiving a signal of the vehicle starting Power key starting (1), the ignition switch KL15 open (1) or the auxiliary driving switch KLS open (1) in the second interaction mode. The second interaction mode is preferably a long touch interaction mode (long time touch or press), such as continuously pressing the corresponding touch key for more than a preset time, such as pressing the power key for more than 1s or 2s when starting the vehicle, continuously pressing the ignition switch for more than 1s or 2s when the ignition switch is opened, or continuously pressing the auxiliary driving key for more than 1s or 2s when the auxiliary driving is opened.

[0029] If the current mode state is the transition mode, the third preset mode switching condition is matched to switch to the pre-sleep mode; the third preset mode switching condition includes that the first transition mode duration exceeds a second threshold t2 or the second transition mode duration exceeds a second preset start waiting time t4, and no vehicle start signal is received.

[0030] If the current mode state is the pre-sleep mode, the fourth preset mode switching condition is matched to switch to the sleep mode; the fourth preset mode switching condition includes receiving a vehicle network sleep signal.

[0031] If the current mode state is the sleep mode, the fifth preset mode switching condition is matched to switch to the shutdown mode; the fifth preset mode switching condition includes that the sleep state lasts for more than a third threshold t3. Preferably, the third threshold t3 is 48h-148h.

[0032] If the current mode state is the pre-sleep mode, the sleep mode or the shutdown mode, the sixth preset mode switching condition is matched to switch to the transition mode; the sixth preset mode switching condition includes receiving a network wake-up signal.

[0033] If the current mode is the sleep mode, the seventh preset mode switching condition is matched to restart the shutdown at a predetermined time, the seventh preset mode switching condition includes that the number of times of starting the fire exceeds a preset number threshold or the system memory is lower than a preset memory threshold, and the vehicle is in the sleep mode at a predetermined restart time point. The preset number threshold is 20-40 times, preferably, the preset memory threshold is set to 200M-400M, preferably 300M; the preset number threshold is 25 times; the predetermined restart time point is set to between 1am and 4am, preferably 2am.

[0034] Embodiment 2:

[0035] The embodiment has the same principle as that of the embodiment 1, and more particularly, a power management method is provided, as shown in Figure 2 Fig. 1 shows a state machine diagram of the power management method of the present application, which is managed by 6 power states of the state machine, and conversion conditions and logic, an abnormality processing mechanism, each state machine corresponds to the power-on state of the internal module and peripheral of the SOC, and the power-off process gradually realizes the power-off of the module, the current gradually decreases, except for the power supply part for realizing the fast start process, the other parts are powered off to reduce the static current, and the risk of power supply is avoided. As shown in Figure 2 Fig. 1, the state machine of the embodiment has 6 power states, which are working mode, standby mode, transition mode, pre-sleep mode, sleep mode and shutdown mode.

[0036] I. State definition

[0037] Working mode: In this state, all modules of the system are powered on, the screen backlight is turned on, the host HMI displays a normal interactive interface, the user normally uses the host in this state, can perform voice interaction, the bus is active, and the current is less than 1A.

[0038] Standby mode: In this state, individual modules of the system are powered off, the screen backlight is turned on, the host HMI displays a standby clock interface, this state can quickly recover to the working mode, voice interaction can be performed, the bus is active, and the current is less than 0.7A.

[0039] Features: The purpose of this state design is that when the user temporarily does not want to use the host, the host can be operated to enter this state, and if the user continues to use the host, the host can be quickly restored to the working mode.

[0040] Transition mode: In this state, part of the modules of the system are powered off, the SOC and the MCU are powered on, when KL15 / ON, the screen backlight is turned on, the HMI displays a standby clock interface, and voice interaction can be performed. When KL15 / OFF, the screen backlight is turned off, this state can quickly recover to the working mode, the bus is active, and the current is less than 0.3A.

[0041] Features: The transition mode is an intermediate state, which is entered after the standby mode is started for 10s without the user turning off the host. The transition mode not only allows the user to quickly recover, but also reduces the power consumption of the host. When the user turns off the host, the host can be used for timed OTA upgrade (Over-The-Air, air download technology, generally refers to remote upgrade) in this state, and the instrument state is detected in this state. If the instrument and other ECUs have communication wake-up requirements for the host, the host will wait in this state.

[0042] Pre-sleep mode: This state is for the system to do some preparation work before entering sleep, during this state, SOC system applications and kernel begin to sleep, processes are suspended and peripheral interfaces are all closed, this state screen backlight is off, voice is off, bus is sleep, current is less than 0.15A.

[0043] Features: The purpose of this state is to suspend processes and close peripherals before the system enters STR, during which sleep logic and exception handling mechanisms need to be done, and sleep time needs to be set to ensure the correct early process of the system entering STR.

[0044] Sleep mode: In this state, dynamic memory is powered, processes are alive, and MCU is in sleep and wake-up state. When receiving a wake-up signal, it will quickly jump to the upper power supply and restore the process. Since dynamic memory is powered and processes are alive in this state, it only takes 3s to restore processes and pictures after a shot. In this state, the screen backlight is off, the voice is off, the bus is sleep, and the current is less than 15mA.

[0045] Features: Dynamic memory is alive, no system initialization is needed after startup, and process recovery only takes 3s, improving user experience.

[0046] Shutdown mode: In this state, the system is completely powered off, the screen backlight is off, the voice is off, the bus is sleep, and the current is less than 100uA.

[0047] Features: Low static current, avoid vehicle power supply.

[0048] II. State switching logic

[0049] C0: Working mode state:

[0050] ① Press the screen button, working mode switches to standby mode;

[0051] ② K15 / OFF waits for 30min and switches to standby mode;

[0052] ③ K15 / OFF user leaves the car and closes the door or locks the car to switch to standby mode, at which time the screen backlight is off.

[0053] Features: The switching logic considers various user scenarios, not only meeting the user's active and automatic switching logic in the car, but also meeting the user's switching logic in the car locking scenario.

[0054] C1: Standby mode state:

[0055] ① Press the screen button, standby mode switches to working mode;

[0056] ② Standby mode switches to transition mode after 10s;

[0057] Features: In this state, the user wants to use the host computer to quickly switch to the working mode, and if the user does not want to use the host computer, it can automatically switch to the transition state to reduce power consumption.

[0058] C2: In the transition mode state:

[0059] ① Press the screen button, and the transition mode is switched to the working mode;

[0060] ② K15 / OFF transition mode waits for 30s to automatically switch to the pre-sleep mode;

[0061] Features: The transition mode can quickly restore the working state according to the user's needs, and can also switch to the sleep state according to the interaction needs with other ECUs.

[0062] C3: In the pre-sleep mode state:

[0063] ① In this mode, when the network is detected to sleep, it is switched to the sleep mode;

[0064] C4: In the sleep mode state:

[0065] ① In this mode, when the user unlocks the car door and other network wake-up signals are detected, it is switched to the transition mode, and when the user gets on the car and starts the fire, it can quickly switch to the working mode;

[0066] ② In this mode, if the user does not use it for 7 days, it is automatically switched to the shutdown mode to avoid the whole vehicle power supply;

[0067] Features: Since the system process is alive in this mode, it only takes 3s to switch to the working mode, and by unlocking the door in advance and switching to the transition mode, the vehicle can be switched to the working mode in 1s; this mode is switched to the shutdown mode through timing control to play a role in power supply protection.

[0068] C5: In the shutdown mode state:

[0069] ① In this mode, the same as the sleep mode, when the user unlocks the car door and other network wake-up signals are detected, it is switched to the transition mode, and when the user gets on the car and starts the fire, it can quickly switch to the working mode.

[0070] The beneficial effects of the present application are that: through the management of the six power states of the state machine, the conversion conditions and logic, the abnormal processing mechanism, each state machine corresponds to the power-on state of the SOC internal module and the peripheral device, and the module power-off process is gradually realized, the current is gradually reduced, except for the fast start process protection part, the other parts are powered off to reduce the static current, and the risk of power supply is avoided. When the host computer is powered on, the process protection is restored quickly, the picture can be restored within 3s, and it can be restored to the state before the user shuts down, which greatly improves the user experience.

[0071] Example 3:

[0072] The embodiment further provides a power management method comprising a silent reset mode on the basis of the embodiments 1 and 2, as shown in the following table: Figure 3 The flowchart of the silent reset in the method of the application is shown in the figure:

[0073] When the vehicle is turned off, the main machine remains in the sleep state. Since the dynamic memory in the sleep state is alive, the memory cannot be released, and long-term problems such as fluency decline and system lag may occur. In order to solve this problem, a silent reset restart scheme is designed. The system is forced to power off and restart to release memory by counting 25 times of starting and monitoring the system memory remaining amount of 300M. The silent reset is restarted by using the RTC alarm (Real Time Clock) set at 2 o'clock at night. After the reset is completed, the sleep mode is re-entered, and the screen backlight is turned off during the whole process. This scheme not only releases the memory to solve the system lag problem, but also has the characteristics of user non-perception.

[0074] Embodiment 4:

[0075] The embodiment further provides some special protection modes and mechanisms in the power management method on the basis of the foregoing embodiments.

[0076] 1. Over-temperature, over-voltage, and power supply abnormal protection mechanism:

[0077] When the main machine detects that the circuit board temperature exceeds 105℃, the power supply voltage exceeds 18V, and there is a power supply signal on the bus, the abnormal processing mechanism of the power management is triggered, that is, the main machine is forced to shut down and enter the shutdown mode to protect the main machine.

[0078] 2. Forced can network sleep:

[0079] When the vehicle is turned off, the main machine will go through the power-off process. If the vehicle network has already been asleep at this time, but the main machine network module abnormally causes misjudgment of the active can network, the main machine cannot sleep and causes the risk of battery power supply. In order to cope with this abnormal situation, a 15min timing forced release can network logic is designed to effectively avoid the abnormal power supply problem.

[0080] 3. Diagnosis configuration:

[0081] The design has multiple clock timers, which can be adapted and changed through diagnosis, and has design flexibility.

[0082] 4. Sleep abnormal processing mechanism:

[0083] Before the system enters the sleep mode, the application process needs to be suspended, the peripherals are closed and the SOC kernel is hibernated in the pre-sleep mode, and the total time is set to 30s. If hibernation cannot be completed during this period, the system cannot be switched to the sleep mode, the fast start function fails, and the system is forced to power off and enter the shutdown mode. This design aims to ensure that the host starts normally and avoids startup failure.

[0084] 5. Phone, diagnosis, software upgrade mode:

[0085] In addition to the above several conventional modes, the design also has a diagnosis mode, a phone mode, and a software upgrade mode. In these modes, state switching will not be affected by other conditions. Only when the user actively exits the above modes will the system be switched to the normal working mode, thereby playing a role in stabilizing the state of these important scenarios.

[0086] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and detail without departing from the scope defined by the claims of the present application. The dimensions described in the drawings and examples are not related to the actual object and are not used to limit the scope of protection of the present application. The dimensions of the actual object can be selected and changed according to actual needs.

Claims

1. A vehicle power management method, characterized in that, include: Receive vehicle status information, locate the current mode status, match preset mode switching conditions according to the vehicle status information, and switch to the preset mode corresponding to the preset mode switching conditions. The preset modes include working mode, standby mode, transition mode, pre-sleep mode, hibernation mode, and power-off mode; The operating mode is as follows: all modules are powered on, the screen backlight is turned on, and the host HMI displays a normal interactive interface. The standby mode is as follows: when individual modules are powered off, the screen backlight is turned on, and the host HMI displays the standby clock interface; The transition modes include a first transition mode and a second transition mode. In the first transition mode, some modules are powered down, the SOC and MCU are powered on, the screen backlight is turned on, and the HMI displays the standby clock interface. In the second transition mode, some modules are powered down, the SOC and MCU are powered on, and the screen backlight is turned off. The pre-sleep mode: The SOC system's applications and kernel begin to hibernate, processes are suspended and all peripheral interfaces are turned off, screen backlight is turned off, voice is turned off, and the bus is put to sleep; The sleep mode includes: dynamic memory power saving, process keep-alive, MCU in sleep-wait state, screen backlight off, voice off, and bus in sleep mode. The shutdown mode is as follows: the entire system is powered off, the screen backlight is turned off, the voice is turned off, and the bus goes into sleep mode. If the current mode is working mode, it will switch to standby mode according to the first preset mode switching condition; The first preset mode switching condition includes one of the following: a first sub-condition, a second sub-condition, or a third sub-condition: The first sub-condition includes receiving a vehicle shutdown signal interacted in a first manner; The second sub-condition includes receiving an ignition switch off and a driver assistance system shutdown signal; The third sub-condition includes not receiving a vehicle start signal after receiving an ignition switch off signal for a duration exceeding the first preset start waiting time t0; If the current mode is standby mode, it will switch to transition mode according to the second preset mode switching condition; The second preset mode switching condition includes not receiving a vehicle start signal for a duration exceeding the first threshold t1 in the current standby mode; The transition modes include a first transition mode and a second transition mode; The second preset mode switching condition includes a fourth sub-condition and a fifth sub-condition; The system enters the first transition mode by matching the fourth sub-condition, which includes the standby mode duration exceeding the first threshold t1 and receiving a signal that the ignition switch is in the on state. The system enters the second transition mode by matching the fifth sub-condition, which includes the standby mode duration exceeding the first threshold t1 and receiving a signal that the ignition switch is in the off state. If a signal indicating that the ignition switch is off is received in the first transition mode, the system switches to the second transition mode. If the current mode is a transition mode, it will switch to pre-sleep mode according to the third preset mode switching condition; The third preset mode switching conditions include the first transition mode duration exceeding the second threshold t2 or the second transition mode duration exceeding the second preset start-up waiting time t4, and no vehicle start signal being received. If the current mode is pre-sleep mode, it will switch to hibernation mode according to the fourth preset mode switching condition; The fourth preset mode switching condition includes receiving a vehicle network sleep signal; If the current mode is hibernation mode, it will switch to power-off mode according to the fifth preset mode switching condition; The fifth preset mode switching condition includes continuously exceeding the third threshold t3 while in a dormant state.

2. The vehicle power management method according to claim 1, characterized in that, If the current mode is a transition mode, switch to standby mode if the pre-start preset mode switching condition is matched, and switch to working mode if the pre-start preset mode switching condition is matched. The pre-start preset mode switching conditions include receiving a signal that the ignition switch is turned on or the driver assistance switch is turned on in the first manner. The pre-start preset mode switching conditions include receiving a vehicle start signal interacted in the second manner, a signal indicating that the ignition switch is on, or a signal indicating that the driver assistance switch is on.

3. The vehicle power management method according to claim 1 or 2, characterized in that, If the current mode is pre-sleep mode, hibernation mode or power-off mode, then match the sixth preset mode switching condition to switch to transition mode; The sixth preset mode switching condition includes receiving a network wake-up signal.

4. The vehicle power management method according to claim 1 or 2, characterized in that, If the current mode is hibernation mode, the device will shut down and restart at the scheduled time, matching the seventh preset mode switching condition. The seventh preset mode switching conditions include the number of times the engine is started exceeds a preset threshold or the system memory is lower than a preset memory threshold, and the vehicle is in hibernation mode at the predetermined restart time.

Images