CN118254702B - Vehicle control method and device, vehicle and storage medium - Google Patents
Vehicle control method and device, vehicle and storage medium Download PDFInfo
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- CN118254702B CN118254702B CN202410692890.0A CN202410692890A CN118254702B CN 118254702 B CN118254702 B CN 118254702B CN 202410692890 A CN202410692890 A CN 202410692890A CN 118254702 B CN118254702 B CN 118254702B
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- 238000000034 method Methods 0.000 title claims abstract description 56
- 239000007858 starting material Substances 0.000 claims abstract description 161
- 238000006243 chemical reaction Methods 0.000 claims abstract description 46
- 230000032683 aging Effects 0.000 claims description 17
- 239000000110 cooling liquid Substances 0.000 claims description 13
- 230000007423 decrease Effects 0.000 claims description 12
- 230000004044 response Effects 0.000 claims description 9
- 238000004590 computer program Methods 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 10
- 230000006870 function Effects 0.000 description 8
- 238000001514 detection method Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 238000004804 winding Methods 0.000 description 6
- 230000005284 excitation Effects 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000004092 self-diagnosis Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
- B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits specially adapted for starting of engines
- F02N11/0862—Circuits specially adapted for starting of engines characterised by the electrical power supply means, e.g. battery
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The application provides a vehicle control method, a device, a vehicle and a storage medium, wherein the method is applied to the field of vehicles and comprises the following steps: if a starting instruction of a starter of a vehicle is received, controlling the output voltage of a high-voltage to low-voltage device in the vehicle to be reduced; the high-voltage to low-voltage conversion device is connected with the electronic control unit and is used for supplying power to the electronic control unit; after the output voltage of the high-voltage to low-voltage device is reduced, the starter is powered by the storage battery to start the starter. The method can avoid the dead halt of each ECU under the condition of starting the starter, and simultaneously saves the cost.
Description
Technical Field
The present application relates to the field of vehicles, and more particularly, to a method, apparatus, vehicle, and storage medium for vehicle control in the field of vehicles.
Background
At present, when an engine is started by a 12V starter, the 12V starter needs a large current of several hundred amperes at the moment of starting, and a high-voltage to low-voltage device is easily pulled across by the large current of several hundred amperes at the moment, so that each ECU (Electronic Control Unit ) which depends on the power supply of the high-voltage to low-voltage device is dead. Based on this, in order to avoid that each ECU is dead-stopped at the moment of starting the 12V starter, in the prior art, by adding an isolator on the low-voltage starting path, the high-voltage to low-voltage device is prevented from being pulled across, and each ECU is dead-stopped. However, the special provision of the isolator leads to an increase in the cost of the whole vehicle. Therefore, how to avoid the dead halt of each ECU and save the cost under the condition of realizing the starting of the starter is a technical problem to be solved urgently.
Disclosure of Invention
The application provides a vehicle control method, a device, a vehicle and a storage medium, wherein the method can prevent each ECU from being halted under the condition of starting a starter, and simultaneously save cost.
In a first aspect, a method of vehicle control is provided, the method comprising: if a starting instruction of a starter of a vehicle is received, controlling the output voltage of a high-voltage to low-voltage device in the vehicle to be reduced; the high-voltage to low-voltage conversion device is connected with the electronic control unit and is used for supplying power to the electronic control unit; after the output voltage of the high-voltage to low-voltage device is reduced, the starter is powered by the storage battery to start the starter.
In the above technical scheme, when the starting instruction of the starter is received, the output voltage of the high-voltage to low-voltage conversion device is controlled to be reduced, namely, when the starting instruction is received, the output voltage of the high-voltage to low-voltage conversion device is pulled down, but because the output voltage after being pulled down is larger than the lowest working voltage of the ECU, even if the output voltage of the high-voltage to low-voltage conversion device is pulled down, the normal working of the ECU can be ensured. Under normal conditions, one of the high-voltage to low-voltage device and the storage battery with higher output voltage supplies power to the starter preferentially, and in the technical scheme, when a starting instruction of the starter is received, the output voltage of the high-voltage to low-voltage device is pulled down, and the pulled down output voltage is usually lower than the voltage of the storage battery, so that after the output voltage of the high-voltage to low-voltage device is reduced, the starter is supplied with power preferentially through the storage battery, so that the starter is started, and the phenomenon that the instant high-voltage to low-voltage device for starting the starter is pulled down instantly is avoided, and each ECU is halted. In addition, in the technical scheme, the isolator arranged on the low-voltage starting path is not relied on, and the phenomenon that each ECU is halted when the starter is started can be realized even if the isolator is not arranged, so that the cost can be saved to a certain extent.
With reference to the first aspect, in some possible implementations, if a start instruction of a starter of the vehicle is received, the method further includes: starting from the moment of receiving the starting instruction, controlling the high-voltage to low-voltage device to prohibit response to a target request within a preset time period, and controlling the high-voltage to low-voltage device to permit response to the target request after the preset time period; wherein the target request is a request for increasing an output current.
With reference to the first aspect and the foregoing implementation manner, in some possible implementation manners, the preset time period is greater than 0.05 seconds and less than or equal to 0.1 seconds.
With reference to the first aspect and the foregoing implementation manner, in some possible implementation manners, the controlling, if a start instruction of a starter of a vehicle is received, the reducing an output voltage of a high-voltage to low-voltage device in the vehicle includes: if a starting instruction of a starter of the vehicle is received, detecting the current voltage of the storage battery; if the current voltage is larger than a first preset voltage value, controlling the output voltage of the high-voltage to low-voltage conversion device to be reduced to a first target voltage value; wherein the first preset voltage value is greater than the first target voltage value; if the current voltage is larger than a second preset voltage value and smaller than or equal to the first preset voltage value, controlling the output voltage of the high-voltage to low-voltage conversion device to be reduced to a second target voltage value; the second target voltage value is smaller than the first target voltage value, and the second preset voltage value is larger than the second target voltage value; if the current voltage is larger than a third preset voltage value and smaller than or equal to the second preset voltage value, controlling the output voltage of the high-voltage to low-voltage conversion device to be reduced to a third target voltage value; the third target voltage value is smaller than the second target voltage value, and the third preset voltage value is larger than the third target voltage value.
With reference to the first aspect and the foregoing implementation manner, in some possible implementation manners, after the controlling the output voltage of the high-voltage to low-voltage device to decrease to the first target voltage value or the second target voltage value, the method further includes: if the first starting failure of the starter is detected, adjusting the output voltage of the high-voltage to low-voltage conversion device to the third target voltage value, and controlling the starter to start again; and if the continuous times of the starting failure of the starter are detected to reach the preset times, outputting a fault code representing the aging of the storage battery.
With reference to the first aspect and the foregoing implementation manner, in some possible implementation manners, the detecting the current voltage of the storage battery if a start command of a starter of the vehicle is received includes: judging whether the current temperature of the cooling liquid of the engine is higher than a preset temperature threshold value or not; and if the temperature of the cooling liquid is higher than a preset temperature threshold, detecting the current voltage of the storage battery under the condition that a starting instruction of the starter is received.
With reference to the first aspect and the foregoing implementation manner, in some possible implementation manners, after the output voltage of the high-voltage to low-voltage device decreases, power is supplied to the starter by the battery to start the starter, including: and after the output voltage of the high-voltage-to-low-voltage device is reduced, if the current voltage of the storage battery is detected to be lower than the lowest working voltage of the electronic control unit, the storage battery and the high-voltage-to-low-voltage device supply power to the starter together so as to start the starter.
In a second aspect, there is provided an apparatus for vehicle control, the apparatus comprising: the voltage control module is used for controlling the output voltage of the high-voltage to low-voltage device in the vehicle to be reduced if a starting instruction of a starter of the vehicle is received; the high-voltage to low-voltage conversion device is connected with the electronic control unit and is used for supplying power to the electronic control unit; and the starting module is used for supplying power to the starter through the storage battery after the output voltage of the high-voltage-to-low-voltage device is reduced so as to start the starter.
With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, the foregoing apparatus further includes: the current limiting module is used for controlling the high-voltage to low-voltage device to inhibit responding to a target request within a preset duration from the moment of receiving a starting instruction of a starter of a vehicle, and controlling the high-voltage to low-voltage device to allow responding to the target request after the preset duration; wherein the target request is a request for increasing an output current.
With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, the preset time period is greater than 0.05 seconds and less than or equal to 0.1 seconds.
With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, the voltage control module is specifically configured to detect a current voltage of the storage battery if a start instruction of a starter of the vehicle is received; if the current voltage is larger than a first preset voltage value, controlling the output voltage of the high-voltage to low-voltage conversion device to be reduced to a first target voltage value; wherein the first preset voltage value is greater than the first target voltage value; if the current voltage is larger than a second preset voltage value and smaller than or equal to the first preset voltage value, controlling the output voltage of the high-voltage to low-voltage conversion device to be reduced to a second target voltage value; the second target voltage value is smaller than the first target voltage value, and the second preset voltage value is larger than the second target voltage value; if the current voltage is larger than a third preset voltage value and smaller than or equal to the second preset voltage value, controlling the output voltage of the high-voltage to low-voltage conversion device to be reduced to a third target voltage value; the third target voltage value is smaller than the second target voltage value, and the third preset voltage value is larger than the third target voltage value.
With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, the foregoing apparatus further includes: the aging detection module is used for adjusting the output voltage of the high-voltage to low-voltage device to the third target voltage value and controlling the starting of the starter again if the first starting failure of the starter is detected after the output voltage of the high-voltage to low-voltage device is controlled to be reduced to the first target voltage value or the second target voltage value; and if the continuous times of the starting failure of the starter are detected to reach the preset times, outputting a fault code representing the aging of the storage battery.
With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, the voltage control module is specifically configured to determine whether a current coolant temperature of the engine is higher than a preset temperature threshold; and if the temperature of the cooling liquid is higher than a preset temperature threshold, detecting the current voltage of the storage battery under the condition that a starting instruction of the starter is received.
With reference to the second aspect and the foregoing implementation manner, in some possible implementation manners, the starting module is specifically configured to, after the output voltage of the high-voltage to low-voltage device decreases, if it is detected that the current voltage of the battery is lower than the lowest operating voltage of the electronic control unit, supply power to the starter together through the battery and the high-voltage to low-voltage device so as to start the starter.
In a third aspect, there is provided a vehicle comprising: a memory for storing executable program code; a processor for calling and running the executable program code from the memory, causing the vehicle to perform the method as described above in the first aspect or any one of the possible implementation manners of the first aspect.
In a fourth aspect, there is provided a computer program product comprising: computer program code which, when run on a computer, causes the computer to perform the method of the first aspect or any one of the possible implementations of the first aspect.
In a fifth aspect, a computer readable storage medium is provided, the computer readable storage medium storing computer program code which, when run on a computer, causes the computer to perform the method of the first aspect or any one of the possible implementations of the first aspect.
Drawings
FIG. 1 is a schematic illustration of a high-pressure start path for an engine according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a low-pressure start path and a high-pressure start path of an engine according to an embodiment of the present application;
FIG. 3 is a schematic diagram of an additional isolator on a low voltage start-up path provided by an embodiment of the present application;
FIG. 4 is a schematic flow chart of a method of vehicle control provided by an embodiment of the application;
FIG. 5 is a schematic diagram of a voltage curve of a high-to-low voltage device and a 12V battery according to an embodiment of the present application;
FIG. 6 is a schematic diagram of a self-diagnosis process for battery aging according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a vehicle control apparatus according to an embodiment of the present application;
Fig. 8 is a schematic structural diagram of a vehicle according to an embodiment of the present application.
Detailed Description
The technical scheme of the application will be clearly and thoroughly described below with reference to the accompanying drawings. Wherein, in the description of the embodiments of the present application, unless otherwise indicated, "/" means or, for example, a/B may represent a or B: the text "and/or" is merely an association relation describing the associated object, and indicates that three relations may exist, for example, a and/or B may indicate: the three cases where a exists alone, a and B exist together, and B exists alone, and furthermore, in the description of the embodiments of the present application, "plural" means two or more than two.
The terms "first," "second," and the like, are used below for descriptive purposes only and are not to be construed as implying or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.
The engine start-up path can generally be split into two paths: a high voltage start-up path and a low voltage start-up path. The two start-up paths are described below:
Referring to fig. 1, fig. 1 is a schematic diagram of a high-pressure start path of an engine. As shown in fig. 1, the high-voltage start-up path includes: a high voltage battery 101, an electric motor 102, a clutch 103 and an engine 104. When the clutch 103 is closed, which is equivalent to connecting the engine 104 and the motor 102 rigidly, the high-voltage battery 101 drives the motor 102 at this time, so that the motor 102 rotates, and the motor 102 drives the engine 104 to rotate to the starting speed, so that the engine is started successfully.
Referring to fig. 2, fig. 2 is a schematic diagram of a low-pressure start path and a high-pressure start path of an engine. As shown in fig. 2, the low-voltage start-up path includes: battery 201, starter 202. When the engine 104 is started through the low-voltage start-up path, power is supplied to the starter 202 through the battery 201 so that the starter 202 is successfully started, thereby starting the engine 104 through the starter 202. The high-voltage to low-voltage device 203 is configured to step down the high voltage output from the high-voltage battery 101 to charge the battery 201 with the stepped-down voltage. And the voltage output by the high-to-low voltage device 203 can also be used to power the ECU 204. When the main negative relay 205 and the main positive relay 206 are closed, the high-voltage to low-voltage conversion device 203 can receive the high-voltage power from the high-voltage battery 101, step down the high-voltage power from the high-voltage battery 101, and output the high-voltage power to the ECU204 and/or the battery 201. The precharge relay 207 in fig. 2 is an indispensable control element in the start-up process of the high voltage system, which ensures smooth start-up and safe operation of the entire high voltage system by controlling the timely closing of the precharge circuit. The ammeter A1 is used for detecting the current of the branch where the main positive relay 206 is located, and the voltmeter V1 is used for detecting the voltage at two ends of the main positive relay 206. The ammeter A2 is used for detecting the current of the branch where the main negative relay 205 is located, and the voltmeter V2 is used for detecting the voltages at two ends of the main negative relay 205.
The present application has been developed to provide selective supply of the voltage required to start starter 202. The high-voltage to low-voltage device 203 supplies power to the storage battery 201 on the premise that: the voltage of the high-voltage to low-voltage device 203 is higher than the voltage of the battery 201. The first thing to use when starting the instant starter 202 is the power of the high-to-low voltage device 203, because the voltage of the high-to-low voltage device 203 is the highest point on the whole low voltage link, i.e. the low voltage starting path. The high current requirement at the moment of starting the starter 202 is not satisfied by the high-voltage to low-voltage device 203, which can cause the high-voltage to low-voltage device 203 to stop outputting, resulting in unsuccessful starting. That is, at the moment of starting, the starter 202 requires a large current of several hundred amperes, but the high-voltage to low-voltage device 203 cannot provide the large current required for starting the starter 202, so that the high-voltage to low-voltage device 203 is easily pulled across at the moment, that is, the high-voltage to low-voltage device 203 stops outputting at the moment, so that the high-voltage to low-voltage device 203 cannot normally supply power to the ECU204, and further, the ECU204 is halted, that is, the ECU204 cannot normally work.
Although the battery 201 is still present on the low-voltage starting path, at this time, since the high-voltage to low-voltage device 203 stops outputting, the whole low-voltage link is powered by the battery 201 instantaneously, so that the probability of unsuccessful starting is greatly improved.
In order to solve the above-described problem, an additional separator is proposed, and as shown in fig. 3, a separator 301 is provided between the high-voltage to low-voltage device 203 and the battery 201. At the start-up time of starter 202, the path along which high-voltage to low-voltage device 203 supplies power to starter 202 is isolated by isolator 301, and high-voltage to low-voltage device 203 is used only to supply power to ECU 204. At this time, the starting current required for the starter 202 can be only the electricity of the battery 201. There is no problem in that the ECU204 crashes due to the abnormal consumption current at the time of starting the starter 202. But because the cost per isolator is high, it is easy to increase the overall vehicle cost.
In order to avoid the dead halt of each ECU under the condition of starting the starter, and simultaneously save the cost, the application is further researched. The application discovers that the current required by the low-voltage starting path is abnormally large (usually up to several hundred amperes) when researching the low-voltage starting path, which is related to series excitation of the current path in the starter, namely the current required by the starter is large when the starter is started, and the current is the inherent current attribute of the starter when the starter is started at low voltage. Therefore, the above-described problem cannot be solved by reducing the current output. In view of the above, the present application proposes to solve the above-mentioned problems by pulling down the output voltage of the high-voltage to low-voltage device. The following describes a method for controlling a vehicle in the embodiment of the present application in detail:
The embodiment of the application provides a vehicle control method, which is applied to a vehicle, wherein the vehicle can be a hybrid vehicle, and the method is particularly applied to a controller in the vehicle, such as a whole vehicle controller. According to the method, when the starter is started, under the condition that the starter is started by pulling down the output voltage of the high-voltage-to-low-voltage device, the dead halt of each ECU is avoided, and meanwhile cost is saved.
Fig. 4 is a schematic flow chart of a method of vehicle control provided by an embodiment of the present application.
Illustratively, as shown in FIG. 4, the method includes:
Step 401: if a starting instruction of a starter of the vehicle is received, controlling the output voltage of a high-voltage to low-voltage device in the vehicle to be reduced; the reduced output voltage is larger than the lowest working voltage of the electronic control unit, and the high-voltage to low-voltage conversion device is connected with the electronic control unit and used for supplying power to the electronic control unit.
Step 402: after the output voltage of the high-voltage to low-voltage device is reduced, the starter is powered by the storage battery to start the starter.
In the embodiment shown in fig. 4, when a start command of the starter is received, the output voltage of the high-voltage to low-voltage conversion device is controlled to be reduced, that is, when the start command is received, the output voltage of the high-voltage to low-voltage conversion device is pulled down, but because the pulled down output voltage is greater than the minimum operating voltage of the ECU, the ECU can still be ensured to operate normally even if the output voltage of the high-voltage to low-voltage conversion device is pulled down. Under normal conditions, one of the high-voltage to low-voltage device and the storage battery with higher output voltage supplies power to the starter preferentially, and in the technical scheme, when a starting instruction of the starter is received, the output voltage of the high-voltage to low-voltage device is pulled down, and the pulled down output voltage is usually lower than the voltage of the storage battery, so that after the output voltage of the high-voltage to low-voltage device is reduced, the starter is supplied with power preferentially through the storage battery, so that the starter is started, and the phenomenon that the instant high-voltage to low-voltage device for starting the starter is pulled down instantly is avoided, and each ECU is halted. In addition, in the technical scheme, the isolator arranged on the low-voltage starting path is not relied on, and the phenomenon that each ECU is halted when the starter is started can be realized even if the isolator is not arranged, so that the cost can be saved to a certain extent.
The specific implementation of each step in the embodiment shown in fig. 4 is described below:
In step 401, further reference may be made to fig. 2, and since the starting of starter 202 is for starting engine 104, the starting command of starter 202 may also be understood as a starting command of engine 104. When the controller receives a start command from starter 202, it may be determined that it is currently desired to start engine 104 via starter 202. At this time, the output voltage of the high-voltage to low-voltage device 203 can be controlled to decrease. Wherein, the output voltage after the reduction is greater than the lowest working voltage of the ECU, so that even if the output voltage of the high-voltage to low-voltage device 203 is reduced, the power supply of the ECU204 by the high-voltage to low-voltage device 203 is not influenced, and the ECU204 can work normally under the condition that the output voltage of the high-voltage to low-voltage device 203 is reduced.
In a specific implementation, the minimum operating voltage of the ECU204 is typically 7V, and thus the output voltage of the high-to-low-voltage device 203 may be reduced to 7V or more. Alternatively, the output voltage of the high-to-low voltage device 203 may be reduced to a voltage value higher than 7V, such as 7.5V, 7.6V, and 7.4V.
It will be appreciated that at the start-up time of starter 202, the output voltage of high-to-low voltage device 203 is approximately between 14.3V and 14.5V, if the output voltage of high-to-low voltage device 203 is not reduced. In the normal temperature environment, the voltage of the 12V battery 201 is not substantially lowered or is lowered less at the start-up time. Therefore, in this embodiment, when the start command is received, the output voltage of the high-voltage to low-voltage device 203 is reduced, for example, to 7.5V, so that the reduced output voltage can maintain the normal operation of the ECU204, and meanwhile, the reduced output voltage is lower than the voltage of the battery 201, when the starter 202 is started, the voltage of the battery 201 with higher voltage in the high-voltage to low-voltage device 203 and the battery 201 is preferentially utilized, that is, the power is preferentially supplied to the starter 202 through the battery 201, so as to realize the start of the starter 202.
In step 402, after the output voltage of the high-voltage to low-voltage device 203 decreases, power is supplied to the starter 202 via the battery 201 to start the starter 202. After successful start-up of starter 202, engine 104 may be started by starter 202.
Since the output voltage of the high-voltage to low-voltage device 203 has been pulled down at this time, the starter 202 at this time corresponds to the electricity supplied from the 12V battery 201. The 12V battery is a term given by rated voltage, and in practice, in the field of vehicles, the full charge of the 12V battery is generally 14.3V.
In addition, even though the voltage of the 12V battery may be pulled down to 8V or even 7.5V, there is no great influence. Because the starting system of the whole starter at this time uses the electricity of the 12V storage battery, the lowest working voltage of 7V of each ECU is not reached. Meanwhile, a high-voltage-to-low-voltage device 203 is also arranged to ensure the power supply of each ECU.
In one possible implementation manner, after the output voltage of the high-voltage to low-voltage device decreases, the power supply is used to power the starter through the storage battery to start the starter, including: after the output voltage of the high-voltage-to-low-voltage device is reduced, if the current voltage of the storage battery is detected to be lower than the lowest working voltage of the electronic control unit, the storage battery and the high-voltage-to-low-voltage device supply power to the starter together so as to start the starter.
If the current voltage state of the storage battery is lower than 7V after the output voltage of the high-voltage-to-low-voltage device is reduced, the current voltage state of the storage battery is detected to influence the working states of other low-voltage components, and at the moment, if the storage battery supplies power to the starter, the probability of successfully starting the starter is relatively low. Therefore, in this embodiment, when the current voltage of the battery is lower than 7V, the battery and the high-voltage to low-voltage device supply power to the starter together, which is beneficial to improving the probability of successful start of the starter.
In one possible implementation manner, the controller may detect the voltage of the storage battery at regular time, and may charge the storage battery by switching from the high voltage to the low voltage whenever the voltage of the storage battery is detected to be reduced to a preset voltage value, so as to avoid the situation that the voltage of the storage battery is reduced to below 7V as much as possible.
In one possible implementation, when the vehicle is required to fly through the ocean for several months, it is possible that the vehicle is not successfully started when the vehicle is off the other end of the coast. The voltage of the 12V battery is pulled down because of the several months of power consumption. Based on this, in this embodiment, after the vehicle is loaded, the 12V power supply system may be disconnected, and the 12V power supply system may be connected when the vehicle is to be unloaded, so as to avoid unsuccessful starting caused by the voltage of the 12V battery being pulled down. Or the high-voltage battery can be charged with more electricity as much as possible before leaving the factory, so that the 12V storage battery can be periodically charged with electricity through the high-voltage battery, and the voltage of the 12V storage battery is prevented from being pulled down.
In an exemplary embodiment, if a start command of the starter is received, the method further includes: starting from the moment of receiving the starting instruction, controlling the high-voltage to low-voltage device to prohibit response to the target request within a preset time period, and controlling the high-voltage to low-voltage device to permit response to the target request after the preset time period; wherein the target request is a request for increasing the output current.
According to the application, research shows that in the prior art, when the starter is started, the high-voltage to low-voltage device usually works first, and the storage battery can start to work later than the high-voltage to low-voltage device. Specifically, referring to fig. 5, it can be seen from the voltage curves of the high-voltage to low-voltage device and the 12V battery in fig. 5 that, when the starter is started, the high-voltage to low-voltage device discharges first, and after about 0.05 seconds from the start, the battery starts to discharge. That is, the high-to-low voltage device would operate 0.05 seconds earlier than the battery. The reason why the high-voltage to low-voltage device works for 0.05 seconds is that: the power of the high-voltage to low-voltage device is sourced from the high-voltage battery, the starting time is equivalent to the discharging reaction of the high-voltage battery, and the energy storage of the high-voltage battery is definitely much larger than that of the 12V storage battery, so that the discharging reaction of the 12V storage battery is slower than that of the high-voltage to low-voltage device.
For the above reasons, the preset time period in the present embodiment may be set based on the time period during which the high-voltage to low-voltage device is operated prior to the battery, for example, may be set to be greater than 0.05 seconds, so that the high-voltage to low-voltage device does not respond to the request for increasing the output current at least within 0.05 seconds from the time when the start instruction is received. Thus, the battery is preferentially responsive to the starting current required for starting the starter.
As is apparent from the above description, since the discharge reaction of the high-voltage to low-voltage device is faster than that of the battery, if the high-voltage to low-voltage device is not prohibited from responding to the request for increasing the output current for a predetermined period of time after the start-up time, the high-voltage to low-voltage device preferentially responds to the large current required for starting the above-described starter, resulting in the high-voltage to low-voltage device being dead. For example, the high current required to start the starter is 500A, and the capability of the high-voltage to low-voltage device to output current is 200A, if the current requirement of 500A is suddenly met, the high-voltage to low-voltage device cannot be provided, and thus the high-voltage to low-voltage device is dead. Therefore, in this embodiment, the high-voltage to low-voltage device is set to prohibit the response to the request for increasing the output current within a preset period after the starting time, and the battery is used for providing the current required for starting the starter in the preset period, so that the high-voltage to low-voltage device is prevented from providing a large current beyond the capability of the high-voltage to low-voltage device instantaneously, and the high-voltage to low-voltage device is prevented from being halted.
Typically, the battery may provide the high current required to start the starter for a predetermined period of time. Even if the output current provided by the storage battery is insufficient to reach the large current required by the starter for some reason, the large current required by the starter can be further complemented by the high-voltage-to-low-voltage device after a preset period of time. Since the storage battery already provides a part of current after the preset time, even if the high-voltage to low-voltage device is needed to complement, the high-voltage to low-voltage device is not needed to provide current which does not meet the output capacity of the storage battery instantaneously. For example, the large current required for starting the starter is 500A, 400A is supplied from the storage battery within a preset time period, and after the preset time period, the high-voltage to low-voltage conversion device recovers the response to the target request, only 100A is required to be supplied at the moment, and the 100A belongs to the current range which can be supplied by the high-voltage to low-voltage conversion device, and the high-voltage to low-voltage conversion device is not halted.
In one possible implementation, the predetermined time period is greater than 0.05 seconds and less than or equal to 0.1 seconds.
That is, the preset time period may take a value between 0.05 seconds and 0.1 seconds, for example, may take a value of 0.08 seconds, 0.09 seconds, etc., which is not particularly limited in this embodiment.
As is clear from the above description, in general, when the starter is started, the high-voltage to low-voltage device is discharged first, and after about 0.05 seconds from the start of the starting, the battery is discharged. Therefore, the preset time period is set to be longer than 0.05 seconds, so that the time for starting the discharge of the high-voltage-to-low-voltage device is later than the discharge time of the storage battery, namely the storage battery is firstly discharged, and the phenomenon that the high-voltage-to-low-voltage device is suddenly halted due to the fact that the high-voltage-to-low-voltage device cannot respond to the large current required for starting the starter is avoided. The preset time length is set to be less than or equal to 0.1 second, so that adverse effects caused by long-time unresponsiveness of the high-voltage switching low-voltage device to a target request are avoided.
In one possible implementation manner, the implementation manner of the step 401 includes: if a starting instruction of a starter of the vehicle is received, detecting the current voltage of the storage battery; if the current voltage is larger than a first preset voltage value, controlling the output voltage of the high-voltage to low-voltage conversion device to be reduced to a first target voltage value; the first preset voltage value is larger than the first target voltage value; if the current voltage is larger than the second preset voltage value and smaller than or equal to the first preset voltage value, controlling the output voltage of the high-voltage to low-voltage conversion device to be reduced to a second target voltage value; the second target voltage value is smaller than the first target voltage value, and the second preset voltage value is larger than the second target voltage value; if the current voltage is larger than the third preset voltage value and smaller than or equal to the second preset voltage value, controlling the output voltage of the high-voltage to low-voltage conversion device to be reduced to a third target voltage value; the third target voltage value is smaller than the second target voltage value, and the third preset voltage value is larger than the third target voltage value.
In this embodiment, the current voltage of the battery is used to determine to what extent the output voltage of the high-voltage to low-voltage device should be reduced, and the larger the current voltage of the battery is, the larger the output voltage of the reduced high-voltage to low-voltage device is. By providing relevant reference standards for reducing the output voltage of the high-voltage-to-low-voltage device, the output voltage of the high-voltage-to-low-voltage device can be reasonably reduced under the condition that the current voltage of the storage battery is in different voltage ranges. And no matter what voltage range the current voltage of the storage battery is in, the output voltage of the reduced high-voltage-to-low-voltage device is smaller than the current voltage of the storage battery, so that the storage battery can supply power to the starter preferentially.
Alternatively, the first preset voltage value may be 13V, the second preset voltage value may be 12V, and the first preset voltage value may be 11V. The first target voltage value may be 9.5V, the second target voltage value may be 8.5V, and the third target voltage value may be 7.5V. The above values may be ±0.5V based on the original value, for example, the first preset voltage value may be 13v±0.5V, i.e., the first preset voltage value may be between 12.5 and 13.5.
On the basis, if the starting time, namely the time when a starting instruction is received, is greater than 13V, the output voltage of the high-voltage to low-voltage conversion device is controlled to be reduced to 9.5V. And if the current voltage of the storage battery is larger than 12V and smaller than or equal to 13V at the starting moment, controlling the output voltage of the high-voltage to low-voltage conversion device to be reduced to 8.5V. And if the current voltage of the storage battery is larger than 11V and smaller than or equal to 12V at the starting moment, controlling the output voltage of the high-voltage to low-voltage conversion device to be reduced to 7.5V.
As can be seen by way of example, the first predetermined voltage value 13V differs from the first target voltage value 9.5 by 3.5V. The second preset voltage value 12V differs from the first target voltage value 8.5V by 3.5V. The third preset voltage value 11V differs from the first target voltage value 7.5V by 3.5V. This is because, considering that in general, if the battery ages, the actual voltage of the aged battery and the above-mentioned current voltage may differ by about 3.5V. Therefore, if the current voltage of the storage battery is greater than 13V at the starting time, and the output voltage of the high-voltage to low-voltage control device is reduced to 9.5V, the problem of starting failure also occurs, which means that the storage battery is likely to have a way to provide a voltage of more than 13V practically due to the aging of the storage battery. Therefore, by means of the characteristic, the embodiment can provide a certain reference basis for the aging detection of the storage battery.
In one possible implementation manner, after controlling the output voltage of the high-voltage to low-voltage device to decrease to the first target voltage value or the second target voltage value, the method further includes: if the first starting failure of the starter is detected, adjusting the output voltage of the high-voltage to low-voltage device to a third target voltage value, and controlling the starter to start again; if the continuous times of the starting failure of the starter are detected to reach the preset times, outputting a fault code representing the aging of the storage battery.
The following description will be given taking the example that the first preset voltage value may be 13V, the second preset voltage value may be 12V, the first preset voltage value may be 11V, the first target voltage value may be 9.5V, the second target voltage value may be 8.5V, and the third target voltage value may be 7.5V as an example:
After the output voltage of the high-voltage to low-voltage device is controlled to be reduced to 9.5V or 8.5V, if the current start failure is detected, the storage battery is possibly aged to a certain extent, but if the output voltage of the high-voltage to low-voltage device is further reduced to 7.5V, the possibility still exists that the starter can be successfully started. For example, if the output voltage of the high-voltage to low-voltage device is controlled to be reduced to 9.5V, but in reality, the battery is aged, and although the current voltage is detected to be 13.1V, because of the virtual electricity inside, only 9V may actually be provided, at this time, because the voltage 9V that the battery can actually provide is lower than the output voltage of the high-voltage to low-voltage device by 9.5V, the power supply voltage to the starter may need to be preferentially provided by the high-voltage to low-voltage device, which may cause the current start failure. However, if the output voltage of the high-voltage to low-voltage device is further reduced to 7.5V, the voltage 9V actually provided by the storage battery is higher than the output voltage of the high-voltage to low-voltage device by 7.5V, so that the starter can be successfully started at this time.
However, if the continuous times of the starting failure of the starter are detected to reach the preset times, the fault indicating that the storage battery is aged is shown to be multiple times, and a fault code representing the aging of the storage battery can be output at the moment, so that a driver can go to a 4S shop to check, and a maintainer of the 4S shop can check the state of the storage battery according to the fault code. If the storage battery is aged, a very good method is provided for detecting the aging of the storage battery. The preset number of times may be calibrated in advance, for example, may be set to 3 times.
In one possible implementation, if a start command of a starter of the vehicle is received, detecting a current voltage of the battery includes: judging whether the current temperature of the cooling liquid of the engine is higher than a preset temperature threshold value or not; if the temperature of the cooling liquid is higher than a preset temperature threshold, detecting the current voltage of the storage battery under the condition that a starting instruction of a starter is received.
The preset temperature threshold can be set according to actual needs, when the current temperature of the cooling liquid of the engine is lower than the preset temperature threshold, the current environment of the vehicle is a low-temperature environment, and when the current temperature of the cooling liquid of the engine is higher than the preset temperature threshold, the current environment of the vehicle is a normal-temperature environment. Alternatively, the preset temperature threshold may take a value between-30 degrees and-40 degrees.
It will be appreciated that the high to low voltage device may suffer from performance due to its low temperature environment, and it is difficult to accurately output the desired voltage as required. Therefore, in this embodiment, when the temperature of the cooling liquid is higher than the preset temperature threshold, the current voltage of the storage battery is detected when the start command is received, and then the output voltage of the high-voltage to low-voltage device is reduced to the corresponding voltage value based on the current voltage, so that it is beneficial to ensure that the high-voltage to low-voltage device can accurately output the corresponding voltage value as required.
For example, if the high-voltage to low-voltage apparatus is affected in operation performance due to being in a low-temperature environment, it is difficult to accurately output the voltages of 9.5V, 8.5V, 7.5V, etc. desired to be output as described above. It is difficult to determine whether the battery is aged based on the output voltage, or even if the battery is aged in the low-temperature environment, the result of the determination may be inaccurate. Therefore, in this embodiment, when the current temperature of the cooling liquid of the engine is higher than the preset temperature threshold, that is, in a normal temperature environment, the current voltage of the storage battery is detected, and the output voltage of the subsequent high-voltage to low-voltage conversion device based on the current voltage is reduced to a corresponding voltage value, and the step of judging whether the storage battery will age is performed in combination with the number of continuous start failures, so that the accuracy of detection of aging of the storage battery is improved, and unnecessary detection in a low temperature environment is avoided.
In one possible implementation manner, the above detection of the aging of the storage battery may be understood as a function of self-diagnosis that the vehicle has, and the self-diagnosis flow of the aging of the storage battery may participate in fig. 6, including:
step 501: if the temperature of the cooling liquid is higher than-30 ℃, under the condition that a starting instruction of the starter is received, detecting the current voltage of the storage battery.
Step 502: if the current voltage of the storage battery is greater than 13V, the output of the high-voltage to low-voltage conversion device is controlled to be 9.5V.
Step 503: if the current voltage of the storage battery is more than 12V and less than or equal to 13V, the output of the high-voltage to low-voltage conversion device is controlled to be 8.5V.
Step 504: if the current voltage of the storage battery is more than 11V and less than or equal to 12V, the output of the high-voltage to low-voltage conversion device is controlled to be 7.5V.
Step 505: if the first start fails, the fault is recorded 1 time and the output of the high-to-low voltage device is changed to 7.5V.
The output of the high-voltage to low-voltage control device is 7.5V when the starter is started for the 2 nd time. Recording 1 time of faults, namely detecting the starting failure of the starter, 1 time of faults, 2 times of faults, namely detecting the continuous starting failure of the starter, 2 times of faults, and 3 times of faults, namely detecting the continuous starting failure of the starter, 3 times of faults.
Step 506: if the number of continuous start failures of the starter is detected to be 3, outputting a fault code representing the aging of the storage battery.
In this embodiment, the root cause that the high-voltage to low-voltage device is pulled across is found at the starting time of the starter, so that the low-voltage starting path where the 12V storage battery is located can save the high-voltage to low-voltage device, and the high-voltage to low-voltage device is prevented from being pulled across at the starting time of the starter. In this embodiment, at the starting time of the starter, the high-voltage to low-voltage device is prohibited from responding to the request for increasing the current within 0.1 seconds, and the stopping of the current output is a safety protection action for the high-voltage to low-voltage device, and the high-voltage to low-voltage device is also coupled with the series-excited 12V starter system. Meanwhile, the application is found through experiments: the discharging reaction of the 12V storage battery is slower than that of the high-voltage to low-voltage device by 0.05 seconds, which provides a reliable theoretical basis for the delay response of the high-voltage to low-voltage device to the request of increasing the output current in the embodiment of the application. Furthermore, in the embodiment of the application, the current voltage of the storage battery is used for controlling the high-voltage to low-voltage conversion device to output a corresponding voltage value, so that the number of continuous start failures of the starter is used as a judging basis for judging whether the storage battery is aged or not. The method is equivalent to the method for realizing starting of the starter, avoiding the dead halt of each ECU and providing a reliable and accurate method for detecting the aging of the storage battery by the way under the condition of saving the cost.
The series excitation in the starter is an excitation method, and means that the excitation winding (field winding) and the armature winding (rotor winding) are connected in series, that is, the current flowing through the excitation winding flows through the armature winding at the same time.
Fig. 7 is a schematic structural diagram of a vehicle control device according to an embodiment of the present application.
Illustratively, as shown in FIG. 7, the vehicle control apparatus 600 includes:
the voltage control module 601 is configured to control an output voltage of a high-voltage to low-voltage device in a vehicle to decrease if a start command of a starter of the vehicle is received; the high-voltage to low-voltage conversion device is connected with the electronic control unit and is used for supplying power to the electronic control unit; and the starting module 602 is used for supplying power to the starter through the storage battery after the output voltage of the high-voltage to low-voltage device is reduced so as to start the starter.
In a possible implementation manner, the apparatus 600 further includes: the current limiting module is used for controlling the high-voltage to low-voltage device to inhibit responding to a target request within a preset duration from the moment of receiving a starting instruction of a starter of a vehicle, and controlling the high-voltage to low-voltage device to allow responding to the target request after the preset duration; wherein the target request is a request for increasing an output current.
In one possible implementation, the preset time period is greater than 0.05 seconds and less than or equal to 0.1 seconds.
In a possible implementation manner, the voltage control module 601 is specifically configured to detect a current voltage of the storage battery if a start command of a starter of the vehicle is received; if the current voltage is larger than a first preset voltage value, controlling the output voltage of the high-voltage to low-voltage conversion device to be reduced to a first target voltage value; wherein the first preset voltage value is greater than the first target voltage value; if the current voltage is larger than a second preset voltage value and smaller than or equal to the first preset voltage value, controlling the output voltage of the high-voltage to low-voltage conversion device to be reduced to a second target voltage value; the second target voltage value is smaller than the first target voltage value, and the second preset voltage value is larger than the second target voltage value; if the current voltage is larger than a third preset voltage value and smaller than or equal to the second preset voltage value, controlling the output voltage of the high-voltage to low-voltage conversion device to be reduced to a third target voltage value; the third target voltage value is smaller than the second target voltage value, and the third preset voltage value is larger than the third target voltage value.
In a possible implementation manner, the apparatus 600 further includes: the aging detection module is used for adjusting the output voltage of the high-voltage to low-voltage device to the third target voltage value and controlling the starting of the starter again if the first starting failure of the starter is detected after the output voltage of the high-voltage to low-voltage device is controlled to be reduced to the first target voltage value or the second target voltage value; and if the continuous times of the starting failure of the starter are detected to reach the preset times, outputting a fault code representing the aging of the storage battery.
In a possible implementation manner, the voltage control module 601 is specifically configured to determine whether the current temperature of the coolant of the engine is higher than a preset temperature threshold; and if the temperature of the cooling liquid is higher than a preset temperature threshold, detecting the current voltage of the storage battery under the condition that a starting instruction of the starter is received.
In a possible implementation manner, the starting module 602 is specifically configured to, after the output voltage of the high-voltage to low-voltage device decreases, supply power to the starter through the battery and the high-voltage to low-voltage device together to start the starter if it is detected that the current voltage of the battery is lower than the minimum operating voltage of the electronic control unit.
Fig. 8 is a schematic structural diagram of a vehicle according to an embodiment of the present application.
Illustratively, as shown in FIG. 8, the vehicle 700 includes: a memory 701 and a processor 702, wherein the memory 701 stores executable program code 7011, and the processor 702 is configured to invoke and execute the executable program code 7011 to perform a method of vehicle control.
In addition, the embodiment of the application also protects a device, which can comprise a memory and a processor, wherein executable program codes are stored in the memory, and the processor is used for calling and executing the executable program codes to execute the method for controlling the vehicle provided by the embodiment of the application.
In this embodiment, the functional modules of the apparatus may be divided according to the above method example, for example, each functional module may be corresponding to one processing module, or two or more functions may be integrated into one processing module, where the integrated modules may be implemented in a hardware form. It should be noted that, in this embodiment, the division of the modules is schematic, only one logic function is divided, and another division manner may be implemented in actual implementation.
In the case of dividing the respective function modules by the respective functions, the apparatus may further include a voltage control module, a start-up module, and the like. It should be noted that, all relevant contents of each step related to the above method embodiment may be cited to the functional descriptions of the corresponding functional modules, which are not described herein.
It should be understood that the apparatus provided in this embodiment is used to perform the above-described method of controlling a vehicle, and thus the same effects as those of the above-described implementation method can be achieved.
In case of an integrated unit, the apparatus may comprise a processing module, a memory module. Wherein, when the device is applied to a vehicle, the processing module can be used for controlling and managing the action of the vehicle. The memory module may be used to support the vehicle in executing mutual program code, etc.
Wherein the processing module may be a processor or controller that may implement or execute the various illustrative logical blocks, modules, and circuits described in connection with the present disclosure. A processor may also be a combination of computing functions, including for example one or more microprocessors, digital Signal Processing (DSP) and microprocessor combinations, etc., and a memory module may be a memory.
In addition, the device provided by the embodiment of the application can be a chip, a component or a module, wherein the chip can comprise a processor and a memory which are connected; the memory is used for storing instructions, and when the processor calls and executes the instructions, the chip can be caused to execute the method for controlling the vehicle provided by the embodiment.
The present embodiment also provides a computer-readable storage medium having stored therein computer program code which, when run on a computer, causes the computer to perform the above-described related method steps for implementing a method for vehicle control as provided in the above-described embodiments.
The present embodiment also provides a computer program product which, when run on a computer, causes the computer to perform the above-described related steps to implement a method of vehicle control provided by the above-described embodiments.
The apparatus, the computer readable storage medium, the computer program product, or the chip provided in this embodiment are used to execute the corresponding method provided above, and therefore, the advantages achieved by the apparatus, the computer readable storage medium, the computer program product, or the chip can refer to the advantages of the corresponding method provided above, which are not described herein.
It will be appreciated by those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional modules is illustrated, and in practical application, the above-described functional allocation may be performed by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to perform all or part of the functions described above.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of modules or units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another apparatus, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.
Claims (10)
1. A method of vehicle control, the method comprising:
If a starting instruction of a starter of a vehicle is received, controlling the output voltage of a high-voltage to low-voltage device in the vehicle to be reduced; the high-voltage to low-voltage conversion device is connected with the electronic control unit and is used for supplying power to the electronic control unit;
After the output voltage of the high-voltage to low-voltage device is reduced, the starter is powered by the storage battery to start the starter.
2. The method according to claim 1, wherein if a start instruction of a starter of a vehicle is received, the method further comprises:
Starting from the moment of receiving the starting instruction, controlling the high-voltage to low-voltage device to prohibit response to a target request within a preset time period, and controlling the high-voltage to low-voltage device to permit response to the target request after the preset time period; wherein the target request is a request for increasing an output current.
3. The method of claim 2, wherein the predetermined time period is greater than 0.05 seconds and less than or equal to 0.1 seconds.
4. The method according to claim 1, wherein the controlling the output voltage of the high-voltage to low-voltage device in the vehicle to decrease if a start command of a starter of the vehicle is received includes:
If a starting instruction of a starter of the vehicle is received, detecting the current voltage of the storage battery;
If the current voltage is larger than a first preset voltage value, controlling the output voltage of the high-voltage to low-voltage conversion device to be reduced to a first target voltage value; wherein the first preset voltage value is greater than the first target voltage value;
If the current voltage is larger than a second preset voltage value and smaller than or equal to the first preset voltage value, controlling the output voltage of the high-voltage to low-voltage conversion device to be reduced to a second target voltage value; the second target voltage value is smaller than the first target voltage value, and the second preset voltage value is larger than the second target voltage value;
If the current voltage is larger than a third preset voltage value and smaller than or equal to the second preset voltage value, controlling the output voltage of the high-voltage to low-voltage conversion device to be reduced to a third target voltage value; the third target voltage value is smaller than the second target voltage value, and the third preset voltage value is larger than the third target voltage value.
5. The method of claim 4, further comprising, after said controlling the output voltage of the high-to-low voltage device to decrease to a first target voltage value or the second target voltage value:
If the first starting failure of the starter is detected, adjusting the output voltage of the high-voltage to low-voltage conversion device to the third target voltage value, and controlling the starter to start again;
And if the continuous times of the starting failure of the starter are detected to reach the preset times, outputting a fault code representing the aging of the storage battery.
6. A method according to claim 4 or 5, comprising: and if a starting instruction of a starter of the vehicle is received, detecting the current voltage of the storage battery, wherein the method comprises the following steps:
Judging whether the current temperature of the cooling liquid of the engine is higher than a preset temperature threshold value or not;
And if the temperature of the cooling liquid is higher than a preset temperature threshold, detecting the current voltage of the storage battery under the condition that a starting instruction of the starter is received.
7. The method of claim 1, wherein said powering the starter by the battery to start the starter after the output voltage of the high-to-low voltage device decreases, comprises:
and after the output voltage of the high-voltage-to-low-voltage device is reduced, if the current voltage of the storage battery is detected to be lower than the lowest working voltage of the electronic control unit, the storage battery and the high-voltage-to-low-voltage device supply power to the starter together so as to start the starter.
8. An apparatus for vehicle control, the apparatus comprising:
The voltage control module is used for controlling the output voltage of the high-voltage to low-voltage device in the vehicle to be reduced if a starting instruction of a starter of the vehicle is received; the high-voltage to low-voltage conversion device is connected with the electronic control unit and is used for supplying power to the electronic control unit;
And the starting module is used for supplying power to the starter through the storage battery after the output voltage of the high-voltage-to-low-voltage device is reduced so as to start the starter.
9. A vehicle, characterized in that the vehicle comprises:
A memory for storing executable program code;
A processor for calling and running the executable program code from the memory, causing the vehicle to perform the method of any one of claims 1 to 7.
10. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when executed, implements the method according to any of claims 1 to 7.
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| CN106894932A (en) * | 2017-03-01 | 2017-06-27 | 奇瑞汽车股份有限公司 | Vehicle startup system and its startup method |
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| CN116279233A (en) * | 2023-03-21 | 2023-06-23 | 长城汽车股份有限公司 | Remote control method and device for vehicle, vehicle and storage medium |
| CN116373837B (en) * | 2023-05-04 | 2025-12-23 | 长城汽车股份有限公司 | Engine starting method of hybrid electric vehicle, whole vehicle controller and vehicle |
| CN116513141A (en) * | 2023-06-20 | 2023-08-01 | 中国第一汽车股份有限公司 | Brake system control method, device, vehicle and non-volatile storage medium |
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| CN106894932A (en) * | 2017-03-01 | 2017-06-27 | 奇瑞汽车股份有限公司 | Vehicle startup system and its startup method |
| CN106870237A (en) * | 2017-03-22 | 2017-06-20 | 上汽通用汽车有限公司 | The starting method of the engine of vehicle and device |
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