Vehicle power supply method and vehicle

Abstract

A vehicle power supply method and a vehicle. The vehicle power supply method is applied to a power supply controller in a vehicle power supply system. The vehicle power supply system further comprises a plurality of relays, wherein the relays are respectively connected to corresponding drive controllers, and the relays are further connected to the power supply controller and a storage battery. The vehicle power supply method comprises: determining a target drive controller from among the drive controllers on the basis of the operation requirements of a vehicle; and driving a relay corresponding to the target drive controller, so that the relay supplies power to the target drive controller by means of the storage battery.

Description

Vehicle power supply methods and vehicles

[0001] This application claims priority to Chinese patent application No. 202410915600.4, filed on July 9, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of vehicle power supply technology, and in particular to a vehicle power supply method and a vehicle. Background Technology

[0003] In existing vehicle power supply systems, when the vehicle is in the OFF position, the vehicle battery continuously supplies power to all devices / controllers on the vehicle. Even if devices such as lights and air conditioning are not in use or are in a dormant state, the battery will still supply power to the relevant drive controllers, causing the vehicle battery to deplete rapidly. This results in the battery voltage dropping significantly during a short period of inactivity. Consequently, when the vehicle is in the ON position, the low battery voltage requires the vehicle to use the mains battery to charge the OFF, thus affecting the vehicle's driving range.

[0004] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is prior art. Technical issues

[0005] The main purpose of this application is to provide a vehicle power supply method and vehicle, which aims to solve the technical problem that in the existing vehicle power supply system, the battery continuously supplies power to all the equipment / controllers of the vehicle, causing the battery voltage to drop low during a short period of idle time, thus affecting the vehicle's driving range. Technical solutions

[0006] To achieve the above objectives, this application proposes a vehicle power supply method, which is applied to a power supply controller in a vehicle power supply system. The vehicle power supply system further includes: a plurality of relays, each relay being connected to a corresponding drive controller, and each relay also being connected to the power supply controller and a battery. The method includes:

[0007] The target drive controller is determined from among the various drive controllers according to the vehicle's operating requirements;

[0008] Drive the relay corresponding to the target drive controller so that the relay supplies power to the target drive controller through the battery.

[0009] In one embodiment, the step of determining the target drive controller among the drive controllers according to the vehicle's operating requirements includes:

[0010] When the vehicle is in the first power-saving mode, the first target drive controller to be powered is determined among the drive controllers according to the current gear of the vehicle.

[0011] Alternatively, when the vehicle is in the second power-saving mode, a second target drive controller to be powered is determined in each of the drive controllers according to the current operating requirements of the vehicle.

[0012] In one embodiment, the step of determining the first target drive controller to be powered in each of the drive controllers according to the current gear of the vehicle when the vehicle is in a first power-saving mode includes:

[0013] When the vehicle is in the first power-saving mode, determine whether the current gear of the vehicle is OFF.

[0014] When the current gear is OFF, the first target drive controller is determined among the drive controllers according to the network status;

[0015] When the current gear is ON, a first target drive controller is determined among the drive controllers based on the voltage conversion.

[0016] In one embodiment, each of the drive controllers includes a plurality of pre-powered drive controllers, and the step of determining the first target drive controller among the drive controllers based on the network status when the current gear is OFF includes:

[0017] When the current gear is OFF, determine whether the CAN network is in a wake-up state;

[0018] When the CAN network is in a wake-up state, each of the pre-powered drive controllers is used as the first target drive controller, wherein each of the pre-powered drive controllers includes a plurality of default wake-up power drive controllers and network wake-up power drive controllers.

[0019] When the CAN network is in a sleep state, each of the default wake-up power supply drive controllers is used as the first target drive controller.

[0020] In one embodiment, the step of driving a relay corresponding to the target drive controller to power the target drive controller via the battery includes:

[0021] Drive the relay corresponding to the first target drive controller so that the relay supplies power to the first target drive controller through the battery;

[0022] After the step of driving the relay corresponding to the first target drive controller to power the first target drive controller through the battery, the method further includes:

[0023] When the driving time exceeds the first preset working requirement time, the driving of the relay corresponding to the first target driving controller is stopped, so that the relay disconnects the power to each of the first target driving controllers, wherein the first target driving controller is the default wake-up power supply driving controller.

[0024] In one embodiment, each of the drive controllers includes a plurality of start-related drive controllers, and the step of determining a first target drive controller among the drive controllers based on the voltage conversion when the current gear is ON includes:

[0025] When the current gear is ON, determine whether the vehicle's DC-DC converter is in the energized state;

[0026] If not, then each of the aforementioned startup-related drivers is identified as the first target driver controller.

[0027] In one embodiment, the method further includes:

[0028] When the vehicle is in a powered driving state, it is determined whether the target drive controller is in a power-off state;

[0029] If so, the relay corresponding to the target drive controller is driven until the target drive controller is in a powered state or the driving time is greater than the driving threshold.

[0030] When the target drive controller is powered on, stop driving the relay corresponding to the target drive controller;

[0031] When the driving time is greater than the driving threshold and the target driving controller is in a power-off state, the driving of the relay corresponding to the target driving controller is stopped, and a fault alarm corresponding to the target driving controller is generated.

[0032] In one embodiment, the step of determining the second target drive controller to be powered among the drive controllers according to the current operating requirements of the vehicle when the vehicle is in the second power-saving mode includes:

[0033] When the vehicle is in the second power-saving mode, determine whether the vehicle has a current working requirement corresponding to each of the drive controllers;

[0034] If so, the drive controller corresponding to the current work requirement shall be used as the second target controller;

[0035] Accordingly, the step of driving the relay corresponding to the target drive controller to power the target drive controller through the battery includes:

[0036] Drive the relay corresponding to the second target drive controller so that the relay supplies power to the second target drive controller through the battery.

[0037] In one embodiment, the step of determining the target drive controller among the drive controllers according to the vehicle's operating requirements further includes:

[0038] When the vehicle is in standard operating mode, each of the drive controllers is identified as the third target controller to be powered.

[0039] Accordingly, the step of driving the relay corresponding to the target drive controller to power the target drive controller through the battery includes:

[0040] The relay corresponding to the third target drive controller is driven so that the relay supplies power to the third target drive controller through the battery.

[0041] In addition, to achieve the above objectives, this application also proposes a vehicle including a vehicle power supply system as described above, the vehicle power supply system performing the vehicle power supply method as described above. Beneficial effects

[0042] This application discloses a vehicle power supply method and a vehicle. The method is applied to a power supply controller in a vehicle power supply system. The vehicle power supply system further includes: a plurality of relays, each relay being connected to a corresponding drive controller, and each relay also being connected to the power supply controller and a battery. The method includes: determining a target drive controller among the drive controllers according to the vehicle's operating requirements; and driving the relay corresponding to the target drive controller so that the relay supplies power to the target drive controller through the battery. Because this application adds a power supply controller and a plurality of relays, it can selectively supply power to different target drive controllers by controlling the relays through the power supply controller. Compared to the prior art, the battery does not need to supply power to all drive controllers, thereby saving the drive controllers' power consumption on the battery and reducing the charging of the battery by the power battery, effectively improving the vehicle's driving range. Attached Figure Description

[0043] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0044] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 is a schematic diagram of the structure of a vehicle power supply system in the prior art;

[0046] Figure 2 is a flowchart illustrating the first embodiment of the vehicle power supply method of this application;

[0047] Figure 3 is a structural schematic diagram of the vehicle power supply system of this application;

[0048] Figure 4 is a flowchart illustrating the second embodiment of the vehicle power supply method of this application;

[0049] Figure 5 is a flowchart illustrating the power supply / power-off strategy of the vehicle in the first power-saving mode in the second embodiment of the vehicle power supply method of this application.

[0050] Figure 6 is a flowchart illustrating the third embodiment of the vehicle power supply method of this application;

[0051] Figure 7 is a flowchart of power supply fault judgment in the third embodiment of the vehicle power supply method of this application;

[0052] Figure 8 is a flowchart of power outage fault judgment in the third embodiment of the vehicle power supply method of this application;

[0053] Figure 9 is a flowchart illustrating the fourth embodiment of the vehicle power supply method of this application;

[0054] Figure 10 is a flowchart illustrating the power supply / power-off strategy of the vehicle under the second power-saving mode in the fourth embodiment of the vehicle power supply method of this application.

[0055] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Embodiments of the present invention

[0056] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0057] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0058] In existing vehicle power supply systems, the battery continuously charges various drive controllers, resulting in a persistent dark current even when the drives are inactive or dormant. This accumulated charging current from numerous drive controllers leads to rapid battery depletion. When the owner leaves the vehicle and it remains unused for several days, the vehicle may become unusable upon restarting, causing inconvenience. Figure 1 illustrates the structure of a prior art vehicle charging system.

[0059] In Figure 1, the power battery charges the storage battery through devices such as DC-DC converters. The storage battery charges all the devices / controllers in the vehicle. All the devices / controllers in the vehicle can be divided into: input interfaces / input controllers, such as combination switches / SSB / brakes, air conditioning panels; logic controllers, such as the body controller corresponding to combination switches / SSB / brakes, and the air conditioning logic controller corresponding to the air conditioning panel; and drive controllers, such as the light / ambient light / electric door drive controller corresponding to the body controller, and the blower / mixing damper / mode damper drive controller corresponding to the air conditioning logic controller.

[0060] As shown in Figure 1, in existing vehicle power supply systems, even when there is no operational demand for the drive controllers (e.g., when lights, air conditioning, etc. are not required to be turned on), the battery will still supply power to the corresponding drive controllers. This results in dark current or increased battery consumption, causing the vehicle battery voltage to drop significantly even after a short period of inactivity, making the vehicle unable to start. Simultaneously, the increased battery consumption necessitates a greater effort from the power battery to charge the battery, thereby reducing the vehicle's driving range.

[0061] Therefore, to address the aforementioned deficiencies, this application provides a vehicle power supply method. This method is applied to a power supply controller in a vehicle power supply system. The vehicle power supply system further includes several relays, each relay connected to a corresponding drive controller, and each relay also connected to the power supply controller and a battery. The method includes: determining a target drive controller among the drive controllers based on the vehicle's operating requirements; and driving the relay corresponding to the target drive controller so that the relay supplies power to the target drive controller through the battery. Compared to the prior art, this embodiment adds a power supply controller and several relays to the vehicle power supply system. This allows for selective power supply to different target drive controllers through the control of the relays by the power supply controller, thereby saving the drive controller's power consumption from the battery and reducing the charging of the battery by the power battery, effectively improving the vehicle's driving range.

[0062] For ease of understanding, please refer to Figure 2, which is a flowchart of the first embodiment of the vehicle power supply method of this application.

[0063] In this embodiment, the method includes steps S10 to S20:

[0064] Step S10: Determine the target drive controller among the drive controllers according to the vehicle's working requirements.

[0065] The vehicle power supply method is applied to the power supply controller in the vehicle power supply system. The vehicle power supply system further includes a plurality of relays, each relay being connected to a corresponding drive controller, and each relay also being connected to the power supply controller and a battery. The structure of the vehicle power supply system can be explained here with reference to Figure 3, which is a schematic diagram of the vehicle power supply system of this application.

[0066] As shown in Figure 3, the vehicle power supply system of this application adds a power supply controller and several relays to the existing power supply system. The power supply controller is connected to the relays corresponding to each logic controller and each drive controller. The power supply controller can wake up / control the relays to engage and disengage via hardwired / CAN network. The input interface / input controller, logic controller, and power supply controller are all input components / direct operation components, directly powered by the battery.

[0067] For example, when an input interface / input controller (e.g., a combination switch) is activated, the relevant logic controller (body controller) can be woken up and powered. The body controller determines whether the lights or wipers need to be activated, and then supplies power to the drive controllers that need to be activated via relays through the power supply controller. This achieves intelligent power supply to different drive controllers in the vehicle to complete the corresponding device actions, thereby ensuring the normal functioning of the vehicle. It can effectively control which drive controllers are powered on and off according to demand, thereby effectively improving the vehicle's energy-saving function.

[0068] The schematic diagram in Figure 3 only shows a portion of the devices / controllers in the vehicle. All other devices / controllers in the vehicle (input interfaces / input controllers, logic controllers, and drive controllers) can adopt the above-described vehicle power supply system structure and implement the vehicle power supply method described in this embodiment.

[0069] Each drive controller can be connected to the corresponding device to control and execute the working actions of the corresponding device.

[0070] The vehicle's operating requirements can be determined by different operating modes selected by the user. This embodiment provides three different vehicle power supply operating modes for the user to choose from. The user can select different vehicle power supply operating modes according to their own driving habits and preferences and make the selection on the vehicle's interactive interface.

[0071] The three vehicle power supply modes are: standard operating mode, first power-saving mode, and second power-saving mode. The standard operating mode can refer to the existing vehicle power supply methods; the first power-saving mode can pre-classify different drive controllers and provide power to drive controllers that may need to work; the second power-saving mode can provide power to drive controllers only when they have a current working need.

[0072] Therefore, step S10 includes:

[0073] Step S101: When the vehicle is in the first power saving mode, determine the first target drive controller to be powered in each drive controller according to the current gear of the vehicle.

[0074] The vehicle's current gear can be ON or OFF. In the first power-saving mode, considering the vehicle is in OFF mode, power can be supplied in advance to drive controllers that may need to work, power can be cut off to drive controllers that do not need to work, and power can be cut off to all drive controllers before the vehicle goes into sleep mode. This first power-saving mode is suitable for users who do not use the vehicle frequently (the vehicle will only be used after being parked for a long time) or users who wish to extend the vehicle's parking time.

[0075] In the first energy-saving mode, all drive controllers can be classified according to the actual vehicle application. Based on the classification results, the drive controllers that may have working requirements in different gears (especially in the OFF gear) are identified as the first target drive controllers.

[0076] Alternatively, step S102: when the vehicle is in the second power-saving mode, determine the second target drive controller to be powered in each of the drive controllers according to the current working requirements of the vehicle.

[0077] The vehicle's current operating requirements can be determined by real-time operating commands triggered by the user while using the vehicle. Considering that in the first power-saving mode, after powering some drive controllers that might have operating needs, those controllers may not actually have those needs, a dark current still exists in the vehicle in this mode. This second power-saving mode strictly supplies power to the drives according to the vehicle's current operating requirements. Only when a drive controller has operating needs is it identified as the second target drive controller to be powered, and power is supplied to it; otherwise, power is cut off.

[0078] Compared to the first energy-saving mode, the second energy-saving mode saves battery power consumption when in the OFF position. When in the ON position, the power battery continuously charges the battery and only supplies power to the drive controllers that need to work, no longer supplying power to all drive controllers. This effectively reduces battery power consumption and indirectly reduces power battery consumption, thereby increasing the vehicle's driving range.

[0079] Alternatively, in step S103: when the vehicle is in standard operating mode, each of the drive controllers is identified as the third target controller to be powered.

[0080] In standard operating mode, each drive controller in the vehicle is directly connected to the battery via its corresponding relay. These relays remain energized and never de-energized, ensuring a continuous power supply from the battery to each drive. This standard operating mode results in a higher dark current, suitable for users who drive frequently and are not concerned about dark current.

[0081] Step S20: Drive the relay corresponding to the target drive controller so that the relay supplies power to the target drive controller through the battery.

[0082] The target drive controller can be the first / second / third target drive controller determined under the above-mentioned different vehicle power supply operating modes (i.e., the drive controller to be powered in different modes). After the target drive controller is determined, the power supply controller can control its corresponding relay to be energized, thereby supplying power to the target drive controller through the battery.

[0083] This embodiment provides a vehicle power supply method. The method is applied to a power supply controller in a vehicle power supply system. The vehicle power supply system further includes several relays, each relay connected to a corresponding drive controller, and each relay also connected to the power supply controller and a battery. Compared to existing technologies, this embodiment adds a power supply controller and several relays to the vehicle power supply system. The power supply controller can control the relays to selectively supply power to different target drive controllers, thereby saving the drive controller's power consumption on the battery and reducing the charging of the battery by the power battery. This effectively improves the vehicle's driving range and provides three different vehicle power supply operating modes for users to choose from, further enhancing the vehicle's intelligent performance.

[0084] Based on the first embodiment of this application, in the second embodiment of this application, the content that is the same as or similar to that in the first embodiment described above can be referred to the above description and will not be repeated hereafter. Based on this, please refer to Figure 4, which is a flowchart illustrating the second embodiment of the vehicle power supply method of this application.

[0085] In this embodiment, step S101 includes steps S1011 to S1013:

[0086] Step S1011: When the vehicle is in the first power saving mode, determine whether the current gear of the vehicle is OFF.

[0087] All drive controllers can be pre-classified based on actual vehicle application conditions, and categorized into the following types according to power supply requirements:

[0088] 1. Default wake-up power supply drive controller: This type of drive controller may have a working requirement when the vehicle is in the OFF position and the network is in sleep mode, such as the high / low beam headlight drive controller.

[0089] 2. Pre-powered drive controller: This type of drive controller includes the default wake-up powered drive controller mentioned above, as well as the network wake-up powered drive controller. The network wake-up powered drive controller only needs to operate during network wake-up. Examples of scenarios where this operation is required include: controlling the high-voltage engagement controller during low-voltage power replenishment: When the vehicle detects a low voltage in the OFF position, a certain logic controller will send a high-voltage engagement control CAN signal. At this time, the network will wake up, and only then will the controller / device controlling the high-voltage engagement need to operate.

[0090] 3. Start-up related drive controllers: These drive controllers are those that require operation within t seconds of the vehicle being in the ON position and before the DC-DC converter is engaged. These drive controllers are solely for starting functions, ensuring sufficient power is supplied to the drive controllers needed for starting. Examples include the brake pedal sensor. (Once the DC-DC converter is engaged, the power battery will supply power to the storage battery; therefore, there is no longer a concern about insufficient power for starting, and power can be supplied to all drive controllers, ensuring their normal operation.)

[0091] 4. Operating related drive controllers: These drive controllers are those that require operation when the vehicle is in the ON position and the DC-DC converter is engaged, or when the vehicle is in the ON position for t seconds. If the DC-DC converter is engaged, the power battery can charge the storage battery and supply power to all operating related drive controllers; if the DC-DC converter is not engaged, it indicates a DC-DC converter malfunction, but power will still be supplied to all operating related drive controllers for normal vehicle operation.

[0092] The above describes the drive controllers that have working requirements in different gear positions of the vehicle. Among the four types of drive controllers mentioned above, there may be the same drive controller. That is, if drive controller A is the default wake-up power supply drive controller, then A is also the pre-power supply drive controller, and A can be the start-up related drive controller and / or the running related drive controller.

[0093] For the drive controllers categorized based on power supply requirements, the corresponding power-off strategies are as follows: For drive controllers powered by default wake-up, power is supplied for a period of time and then cut off if the CAN network does not wake them up; For drive controllers powered by network wake-up, power is cut off immediately after the network goes into sleep mode; For drive controllers in the ON position of the vehicle (starting and running related drive controllers), the power-off strategy of the OFF position is followed after detecting the change from the ON position to the OFF position.

[0094] For the above power-off strategy, if there is a drive controller that meets the power supply conditions in the second power-saving mode, it will also be powered to avoid the need for the drive controller to continue working after the power is cut off by the above power-off strategy.

[0095] Step S1012: When the current gear is OFF, determine the first target drive controller among the drive controllers according to the network status.

[0096] In the first power-saving mode, when the vehicle is in the OFF position, power can be supplied to the drive controller that may be working in advance. Compared with the second power-saving mode, the drive controller responds faster and can effectively save power compared with the standard working mode.

[0097] In one embodiment, step S1012 includes steps S10121 to S10123:

[0098] Step S10121: When the current gear is OFF, determine whether the CAN network is in a wake-up state.

[0099] Step S10122: When the CAN network is in a wake-up state, each of the pre-powered drive controllers is used as the first target drive controller, wherein each of the pre-powered drive controllers includes a plurality of default wake-up power drive controllers and network wake-up power drive controllers.

[0100] Step S10123: When the CAN network is in a sleep state, each of the default wake-up power supply drive controllers is used as the first target drive controller.

[0101] When the vehicle is in the OFF position, it checks whether the vehicle is in the OFF position and whether the drive controller is awake. If so, it continues to check whether the CAN network is awake. When the CAN network is awake, each pre-powered drive controller has a working requirement, and it is taken as the first target drive controller to be powered. When the CAN network is in sleep state, only the awakened power supply drive controller has a working requirement by default, and it is taken as the first target drive controller to be powered.

[0102] Step S1013: When the current gear position is ON, determine the first target drive controller among the drive controllers according to the voltage conversion situation.

[0103] When the vehicle is in the ON position, the first target drive controller to be powered at different times during the ON position can be further determined based on the operation of the DC-DC converter. Therefore, step S1013 includes steps S10131~S10132:

[0104] Step S10131: When the current gear is ON, determine whether the vehicle's DC-DC converter is in the energized state.

[0105] Step S10132: If not, then each of the aforementioned startup-related drivers is determined as the first target driver controller.

[0106] When the vehicle is switched to the ON position, if the DC-DC converter is not in the engaged state (i.e., the DC-DC converter has not yet started working), the vehicle is in the starting state for t2 seconds. During this time, each of the aforementioned start-related drivers can be identified as the first target drive controller to be powered. The starting-related drive controller can be identified as the first target drive controller to be powered until the DC-DC converter is in the engaged state or the time since the vehicle was switched to the ON position exceeds the preset t2 seconds.

[0107] Furthermore, to further illustrate the power-off strategy in the first power-saving mode, step S20 includes step S20':

[0108] Step S20': Drive the relay corresponding to the first target drive controller so that the relay supplies power to the first target drive controller through the battery.

[0109] Following step S20', step S30' is also included:

[0110] Step S30': When the driving time is greater than the first preset working requirement time, stop driving the relay corresponding to the first target driving controller so that the relay disconnects the power to each of the first target driving controllers, wherein the first target driving controller is the default wake-up power supply driving controller.

[0111] The first preset working requirement time t1 can be the response time of the default wake-up power supply drive controller in the OFF position. The first preset working requirement time t1 can be set according to different drive controllers. While driving the relay corresponding to the first target drive controller (default wake-up power supply drive controller), a timer 1 can be set to time the time. When the timer 1 timeout is greater than t1, the power can be cut off to each default wake-up power supply drive controller, thereby achieving power cut-off to all drive controllers.

[0112] Furthermore, for ease of understanding, Figure 5 can be used as a reference to provide a complete explanation of the power supply / power cut-off process of the vehicle when it is in the first power saving mode as described above. Figure 5 is a flowchart illustrating the power supply / power cut-off strategy of the vehicle in the first power saving mode in the second embodiment of the vehicle power supply method of this application.

[0113] In Figure 5, when the vehicle is in the OFF position, it checks whether the vehicle is in the OFF position and the drive controller is awake. If so, it continues to check whether the CAN network is awake. When the CAN network is awake, it powers on each pre-powered drive controller and powers off other drive controllers. It also checks in real time whether the CAN network is in sleep mode. If it is in sleep mode, it powers on only the default wake-up drive controller and powers off other devices (including the network wake-up drive controller), and restarts Timer 1. When the CAN network is awake, it powers on the default wake-up drive controller directly and powers off other devices (including the network wake-up drive controller), and restarts Timer 1. It also checks in real time whether the CAN network is awake. If it is awake, it continues to power on each pre-powered drive controller and powers off other drive controllers.

[0114] If the timing duration of timer 1 is greater than t1, then all drive controllers can be powered off. At this time, the CAN network is still monitored in real time to prevent the user from operating the vehicle again.

[0115] In real time, determine whether the vehicle sleep conditions are met. If so, determine to power off all drive controllers and detect after all drive controllers have been powered off. Then, control each drive controller to enter sleep state and in real time determine and detect whether the vehicle is in OFF position and the drive controller is in wake-up state.

[0116] When the vehicle is in the OFF position, it continuously detects whether the vehicle's current gear has been switched to the ON position.

[0117] When the vehicle is in the ON position, timer 2 is restarted to determine whether the DC-DC converter is working (i.e., whether the DC-DC high voltage is engaged). If not, power is supplied to only the start-related drive controllers, while other drive controllers are powered off. If the DC-DC high voltage is engaged or timer 2 is greater than t2, power is supplied to all running-related drive controllers.

[0118] When power is supplied in the ON position, it is determined in real time whether the vehicle has switched to the OFF position. If so, it enters the OFF position state and executes the corresponding power supply / power off strategy.

[0119] In this embodiment, when the vehicle is in the first power-saving mode, it is determined whether the vehicle's current gear is OFF. If the current gear is OFF, a first target drive controller is determined among the drive controllers based on the network status. If the current gear is ON, the first target drive controller is determined among the drive controllers based on the voltage conversion. This first power-saving mode categorizes drive controllers that may need to operate and pre-supplys them, preparing them for operation. Simultaneously, when a drive controller is powered off but requires operation, it can be promptly powered to ensure normal operation. Powering off unnecessary drive controllers ensures that they are de-energized after hibernation, reducing dark current after vehicle hibernation, extending vehicle storage time, and improving vehicle performance. This vehicle power supply mode pre-supplys drive controllers, effectively improving vehicle response speed, and is suitable for users who do not use their vehicles frequently or wish to extend vehicle storage time.

[0120] Based on the first and second embodiments of this application, in the third embodiment of this application, the content that is the same as or similar to that in embodiments one and two above can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to Figure 6, which is a schematic flowchart of the third embodiment of the vehicle power supply method of this application.

[0121] In this embodiment, in order to achieve fault detection of the drive controller, the vehicle power supply method further includes steps A01 to A04:

[0122] Step A01: When the vehicle is in a powered driving state, determine whether the target drive controller is in a power-off state.

[0123] Step A02: If yes, drive the relay corresponding to the target drive controller until the target drive controller is in a powered state or the drive time is greater than the drive threshold.

[0124] Step A03: When the target drive controller is powered on, stop driving the relay corresponding to the target drive controller.

[0125] Step A04: When the driving time is greater than the driving threshold and the target driving controller is in a power-off state, stop driving the relay corresponding to the target driving controller and generate a fault alarm corresponding to the target driving controller.

[0126] When the vehicle adopts the above-mentioned power supply strategy, i.e., the drive controller in the vehicle is in a power supply drive state, the existence of a power supply fault can be determined by judging the real-time state of the target drive controller to be powered. For ease of understanding, the power supply drive fault detection process can be explained here with reference to Figure 7, which is a flowchart of the power supply fault judgment in the third embodiment of the vehicle power supply method of this application.

[0127] In Figure 7, the system first checks whether the vehicle's drive controller has changed from a non-powered drive to a powered drive. If so, it checks whether the corresponding target drive controller is in a power-off state. If not, it does not drive the relay (it is already engaged and does not need to be driven again), and returns to check whether a change from a non-powered drive to a powered drive has been detected. If so, it controls the corresponding target drive controller's relay to engage and starts timer 0 to check whether the target drive controller is in a powered state in real time. If so, it clears the power supply fault and stops driving the relay, returning to the step of checking whether a change from a non-powered drive to a powered drive has been detected. If the timer 0's duration is greater than t0 (drive threshold) and the target drive controller is still in a power-off state, it indicates a power supply failure / target driver failure. At this time, the target drive controller power supply fault is recorded, and its corresponding relay is stopped from being driven. The vehicle's instrument panel displays "**Target drive controller (device) power supply abnormality, please repair" to prompt the user.

[0128] In one embodiment, since the power-off drive logic can be similar to the power supply drive logic described above, the power-off drive fault detection process can be explained with reference to FIG8. FIG8 is a flowchart of power-off fault judgment in the third embodiment of the vehicle power supply method of this application.

[0129] In Figure 8, the system first checks whether the vehicle's drive controller has changed from a non-power-off drive to a power-off drive. If so, it checks whether the corresponding target drive controller is in a powered-on state. If not, it does not drive the relay (the target drive controller is not powered, so there is no need to drive the relay), and returns to check whether a non-power-off drive has changed to a power-off drive. If so, it controls the relay to disconnect and starts timer 3 to check whether the target drive controller is in a power-off state in real time. If so, it clears the power-off fault, stops driving the relay, and returns to the step of checking whether a non-power-off drive has changed to a power-off drive. If the timer 3's duration is greater than t3 (power-off drive threshold) and the target drive controller is still in a powered-on state, it indicates a power-off failure / target driver failure. At this time, the target drive controller power-off fault is recorded, and its corresponding relay is stopped. The vehicle's instrument panel displays "**Target drive controller (device) power-off abnormality, please repair" to prompt the user.

[0130] This embodiment determines whether the target drive controller is in a power-off state when the vehicle is in a powered-on drive state. If so, it drives the relay corresponding to the target drive controller until the target drive controller is in a powered-on state or the drive time exceeds a second drive threshold. When the target drive controller is in a powered-on state, it stops driving the relay corresponding to the target drive controller. When the drive time exceeds the second drive threshold and the target drive controller is in a power-off state, it stops driving the relay corresponding to the target drive controller and generates a fault alarm for the target drive controller. This achieves fault diagnosis and alerting for each drive controller in the vehicle.

[0131] Based on the first, second, and third embodiments of this application, the content that is the same as or similar to the first, second, and third embodiments described above in the fourth embodiment of this application can be referred to the above description and will not be repeated hereafter. Please refer to Figure 9, which is a flowchart illustrating the fourth embodiment of the vehicle power supply method of this application.

[0132] In this embodiment, step S102 includes steps S1021 to S1022:

[0133] Step S1021: When the vehicle is in the second power saving mode, determine whether the vehicle has a current working requirement corresponding to each of the drive controllers.

[0134] In this second power-saving mode, power is supplied only to a drive controller when it has operational needs, while power is cut off to other drive controllers that do not require operation. This second power-saving mode can temporarily supply power to relevant target drive controllers based on operational needs, further saving energy compared to the first power-saving mode. Furthermore, due to the short response time (milliseconds) of the power supply controller and drive controllers, the user hardly perceives any response delay. This second power-saving mode is suitable for users who want to extend vehicle storage time, improve vehicle range, and can accept a certain level of response delay.

[0135] Step S1022: If so, the drive controller corresponding to the current work requirement is taken as the second target controller.

[0136] Accordingly, step S20 includes step S20'':

[0137] Step S20'': Drive the relay corresponding to the second target drive controller so that the relay supplies power to the second target drive controller through the battery.

[0138] Here, we can illustrate the power supply process of the target drive controller when the vehicle is in the second power-saving mode with an example, using specific operating conditions:

[0139] When the input interface / input controller (e.g., combination switch) is activated, the relevant logic controller (body controller) can be woken up and power is supplied to the logic controller. The body controller determines whether the lights or wipers need to be activated. Then, the power supply controller supplies power to the drive controller that needs to be activated (i.e., the second target drive controller) through a relay, realizing intelligent power supply to different drive controllers in the vehicle to complete the corresponding equipment action of the second target drive controller, thereby ensuring the normal function of the vehicle.

[0140] Similarly, the power supply process of the target drive controller when the vehicle is in the second power-saving mode is illustrated with an example as follows:

[0141] When the vehicle is in the ON position and the user does not press the air conditioning panel, i.e., when the air conditioning does not require operation, the power supply controller cuts off power to the drive controllers corresponding to the air conditioning operation requirements, such as the blower / mixing damper / mode damper drive controllers, through relays.

[0142] Alternatively, if none of the combination switches in the vehicle are turned on, i.e. there is no need for the lights and wipers to operate, the power supply controller cuts off power to the drive controller corresponding to the need for the lights and wipers to operate, such as the wiper / light drive controller, via a relay.

[0143] Figure 10 can also be used to illustrate the power supply / power cut-off process of the vehicle when it is in the second node mode as described above. Figure 10 is a flowchart illustrating the power supply / power cut-off strategy of the vehicle in the second power saving mode in the fourth embodiment of the vehicle power supply method of this application.

[0144] In Figure 10, it can first be determined whether there is a current working requirement for the logic controller in the system that corresponds to the drive controller. If so, the drive controller corresponding to the current working requirement is determined as the second target drive controller and powered on and driven; otherwise, the other drive controllers that do not have a current working requirement are powered off and driven.

[0145] In this embodiment, when the vehicle is in the second power-saving mode, it is determined whether the vehicle has a current working requirement corresponding to each of the drive controllers. If so, the drive controller corresponding to the current working requirement is designated as the second target controller. The relay corresponding to the second target drive controller is driven so that the relay supplies power to the second target drive controller through the battery. In this embodiment, the second power-saving mode only supplies power to the drive controller when there is a working requirement; otherwise, it cuts off the power. Although the drive controller is temporarily powered when there is a working requirement, the response speed is slightly slower than in the first power-saving mode, but the response time is in the millisecond range, which has a negligible impact on the user. This reduces dark current after the vehicle goes into sleep mode, extending the vehicle's storage time. In this vehicle power supply mode, the vehicle cuts off power to the drive controllers that do not need to work in any gear, which reduces battery voltage consumption and indirectly reduces the charging of the battery by the power battery, further improving the vehicle's driving range. This is suitable for users who want to extend the vehicle's storage time and improve its driving range and can accept a certain response delay (in milliseconds, which is generally imperceptible to the user).

[0146] Furthermore, this application also proposes a vehicle that includes a vehicle power supply system as described above, wherein the vehicle power supply system can perform the vehicle power supply method as described above.

[0147] In this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0148] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0149] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as a read-only memory image (ROM) / random access memory (RAM), magnetic disk, optical disk), and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0150] The above are merely some embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A method for supplying power to a vehicle, wherein, The method is applied to a power supply controller in a vehicle power supply system, the vehicle power supply system further comprising: a plurality of relays, each relay being connected to a corresponding drive controller, and each relay also being connected to the power supply controller and a battery; the method comprising: The target drive controller is determined from among the various drive controllers according to the vehicle's operating requirements; Drive the relay corresponding to the target drive controller so that the relay supplies power to the target drive controller through the battery.

2. The method as described in claim 1, wherein, The step of determining the target drive controller among the drive controllers according to the vehicle's operating requirements includes: When the vehicle is in the first power-saving mode, the first target drive controller to be powered is determined among the drive controllers according to the current gear of the vehicle. Alternatively, when the vehicle is in the second power-saving mode, a second target drive controller to be powered is determined in each of the drive controllers according to the current operating requirements of the vehicle.

3. The method of claim 2, wherein, The step of determining the first target drive controller to be powered among the drive controllers based on the vehicle's current gear when the vehicle is in the first power-saving mode includes: When the vehicle is in the first power-saving mode, determine whether the current gear of the vehicle is OFF. When the current gear is OFF, the first target drive controller is determined among the drive controllers according to the network status; When the current gear is ON, a first target drive controller is determined among the drive controllers based on the voltage conversion.

4. The method of claim 3, wherein, Each of the aforementioned drive controllers includes a plurality of pre-powered drive controllers. The step of determining the first target drive controller among the aforementioned drive controllers based on the network status when the current gear is OFF includes: When the current gear is OFF, determine whether the CAN network is in a wake-up state; When the CAN network is in a wake-up state, each of the pre-powered drive controllers is used as the first target drive controller, wherein each of the pre-powered drive controllers includes a plurality of default wake-up power drive controllers and network wake-up power drive controllers. When the CAN network is in a sleep state, each of the default wake-up power supply drive controllers is used as the first target drive controller.

5. The method of claim 4, wherein, The step of driving the relay corresponding to the target drive controller, so that the relay supplies power to the target drive controller through the battery, includes: Drive the relay corresponding to the first target drive controller so that the relay supplies power to the first target drive controller through the battery; After the step of driving the relay corresponding to the first target drive controller to power the first target drive controller through the battery, the method further includes: When the driving time exceeds the first preset working requirement time, the driving of the relay corresponding to the first target driving controller is stopped, so that the relay disconnects the power to each of the first target driving controllers, wherein the first target driving controller is the default wake-up power supply driving controller.

6. The method of claim 3, wherein, Each of the aforementioned drive controllers includes a plurality of start-related drive controllers. The step of determining the first target drive controller among the aforementioned drive controllers based on the voltage conversion when the current gear position is ON includes: When the current gear is ON, determine whether the vehicle's DC-DC converter is in the energized state; If not, then each of the aforementioned startup-related drivers is identified as the first target driver controller.

7. The method of claim 2, wherein, The method further includes: When the vehicle is in a powered driving state, it is determined whether the target drive controller is in a power-off state; If so, the relay corresponding to the target drive controller is driven until the target drive controller is in a powered state or the driving time is greater than the driving threshold. When the target drive controller is powered on, stop driving the relay corresponding to the target drive controller; When the driving time is greater than the driving threshold and the target driving controller is in a power-off state, the driving of the relay corresponding to the target driving controller is stopped, and a fault alarm corresponding to the target driving controller is generated.

8. The method of claim 2, wherein, The step of determining the second target drive controller to be powered among the drive controllers based on the current operating requirements of the vehicle when the vehicle is in the second power-saving mode includes: When the vehicle is in the second power-saving mode, determine whether the vehicle has a current working requirement corresponding to each of the drive controllers; If so, the drive controller corresponding to the current work requirement shall be used as the second target controller; Accordingly, the step of driving the relay corresponding to the target drive controller to power the target drive controller through the battery includes: Drive the relay corresponding to the second target drive controller so that the relay supplies power to the second target drive controller through the battery.

9. The method of claim 1, wherein, The step of determining the target drive controller among the drive controllers according to the vehicle's operating requirements further includes: When the vehicle is in standard operating mode, each of the drive controllers is identified as the third target controller to be powered. Accordingly, the step of driving the relay corresponding to the target drive controller to power the target drive controller through the battery includes: The relay corresponding to the third target drive controller is driven so that the relay supplies power to the third target drive controller through the battery.

10. A vehicle, wherein, The vehicle includes a vehicle power supply system as described in claim 1, the vehicle power supply system performing a vehicle power supply method as described in any one of claims 1 to 9.

Images