Switching system, method, electronic device, readable storage medium and vehicle of power supply

Abstract

The application discloses a power supply switching system and method, electronic equipment, readable storage medium and vehicle, and relates to the technical field of vehicle power supply, and comprises the following steps: a main power supply sends a first output signal to a first control module; the first control module converts the voltage value of the first output signal into the power supply voltage value of the low-voltage domain circuit of the vehicle to obtain a second output signal and supply power to the low-voltage domain circuit in the case of detecting that the voltage of the first output signal is normal, and stops sending a state signal to a second control module in the case of detecting that the voltage is abnormal; a backup power supply sends a third output signal to the second control module; and the second control module converts the voltage value of the third output signal into the power supply voltage value in the case of not receiving the state signal within a preset time length, obtains a fourth output signal and supplies power to the low-voltage domain circuit, so as to realize power supply by using the main and backup power supplies, and solve the problem that the vehicle-mounted system and the advanced driving assistance system are abnormal due to the failure of the fixed power supply in the prior art.

Description

Technical Field

[0001] This application belongs to the field of vehicle power supply technology, specifically relating to a power switching system, method, electronic device, readable storage medium, and vehicle. Background Technology

[0002] Advanced Driver Assistance Systems (ADAS) are safety driving assistance systems that use sensors installed in a vehicle to collect and process data to provide hazard warnings to the driver. In-vehicle systems are short for in-vehicle infotainment products installed in vehicles, used to enhance user experience, services, and safety. The circuitry supporting in-vehicle systems and ADAS operates in a low-voltage domain; therefore, a method for supplying power to the vehicle's low-voltage circuitry is required to ensure their proper functioning.

[0003] In prior art, a fixed power supply is used to power the low-voltage circuitry of the vehicle.

[0004] In the process of developing this application, the inventors discovered that the prior art has at least the following problems: because the power supply for the low-voltage domain circuit of the vehicle is fixed, the low-voltage domain circuit of the vehicle will malfunction due to the failure of the fixed power supply, which in turn causes the vehicle system and advanced driver assistance system to malfunction. Summary of the Invention

[0005] This application aims to provide a power switching system, method, electronic device, readable storage medium, and vehicle, at least to solve the problem in the prior art where the fixed power supply for the low-voltage domain circuits of the vehicle causes the low-voltage domain circuits to malfunction due to a fixed power supply failure, which in turn causes malfunctions in the vehicle system and advanced driver assistance system.

[0006] To solve the above-mentioned technical problems, this application is implemented as follows:

[0007] In a first aspect, embodiments of this application provide a power switching system, the system including a main power supply, a first control module, a backup power supply, and a second control module;

[0008] The main power supply is used to send a first output signal to the first control module;

[0009] The first control module is used to convert the voltage value of the first output signal into the first power supply voltage value of the low voltage domain circuit of the vehicle when the first voltage of the first output signal is detected to be normal, obtain the second output signal and supply power to the low voltage domain circuit.

[0010] The first control module is also configured to send a status signal to the second control module when the first voltage is normal, and to stop sending the status signal to the second control module when an abnormal first voltage of the first output signal is detected.

[0011] The backup power supply is used to send a third output signal to the second control module;

[0012] The second control module is used to convert the voltage value of the third output signal into the first power supply voltage value if the status signal is not received within a preset time period, to obtain a fourth output signal and supply power to the low voltage domain circuit.

[0013] Secondly, embodiments of this application also provide a power switching method, the method comprising:

[0014] A first output signal is generated by the vehicle's main power supply, and a third output signal is generated by the vehicle's backup power supply.

[0015] When the first voltage of the first output signal is detected to be normal, the voltage value of the first output signal is converted into the first power supply voltage value of the low voltage domain circuit of the vehicle, a second output signal is obtained and power is supplied to the low voltage domain circuit, and a status signal is generated.

[0016] If a first voltage anomaly is detected in the first output signal, the generation of the status signal is stopped. If the status signal is not detected within a preset time period, the voltage value of the third output signal is converted into the first power supply voltage value to obtain a fourth output signal and supply power to the low-voltage domain circuit.

[0017] Thirdly, embodiments of this application also provide an electronic device, which includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method described in the second aspect.

[0018] Fourthly, embodiments of this application also provide a readable storage medium on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the second aspect.

[0019] Fifthly, embodiments of this application also provide a vehicle including a power switching system as described in the first aspect to implement the power switching method as described in the second aspect.

[0020] In this embodiment, the power switching system includes a main power supply, a first control module, a backup power supply, and a second control module. The main power supply sends a first output signal to the first control module. The first control module, when detecting a normal first voltage of the first output signal, converts the voltage value of the first output signal into a first supply voltage value for the low-voltage domain circuit of the vehicle, obtains a second output signal, and supplies power to the low-voltage domain circuit. The first control module is also used to send a status signal to the second control module when the first voltage is normal, and to stop sending the status signal to the second control module when detecting an abnormal first voltage of the first output signal. The backup power supply sends a third output signal to the second control module. The second control module is used for... If no status signal is received within a preset time period, the voltage value of the third output signal is converted into the first supply voltage value to obtain the fourth output signal and supply power to the low-voltage domain circuit. This enables the use of a main and backup power supply to power the vehicle's low-voltage domain circuit. In other words, if the main power supply fails, the backup power supply is used to power the vehicle's low-voltage domain circuit, reducing the possibility of the vehicle's low-voltage domain circuit malfunctioning due to power failure. This improves the stability of the vehicle system and advanced driver assistance system and solves the problem in the prior art where the power supply to the vehicle's low-voltage domain circuit is fixed, causing the low-voltage domain circuit to malfunction due to the failure of the fixed power supply, which in turn causes malfunctions in the vehicle system and advanced driver assistance system. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a power switching system provided in an embodiment of this application;

[0022] Figure 2 This is a schematic diagram of another power switching system provided in an embodiment of this application;

[0023] Figure 3 This is a flowchart illustrating the steps of a power switching method provided in an embodiment of this application;

[0024] Figure 4 This is a schematic diagram of the hardware structure of an electronic device according to an embodiment of this application;

[0025] Figure 5 This is a schematic diagram of the hardware structure of an electronic device according to an embodiment of this application. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0028] Reference Figure 1 This application provides a power switching system, comprising a main power supply, a first control module, a backup power supply, and a second control module. The main power supply sends a first output signal to the first control module. The first control module, upon detecting that the first voltage of the first output signal is normal, converts the voltage value of the first output signal into a first supply voltage value for the low-voltage domain circuit of the vehicle, obtains a second output signal, and supplies power to the low-voltage domain circuit. The first control module is also configured to send a status signal to the second control module when the first voltage is normal, and to stop sending the status signal to the second control module when detecting that the first voltage of the first output signal is abnormal. The backup power supply sends a third output signal to the second control module. The second control module, if it does not receive the status signal within a preset time period, converts the voltage value of the third output signal into the first supply voltage value, obtains a fourth output signal, and supplies power to the low-voltage domain circuit.

[0029] In this embodiment, a primary and backup power supply is used to power the vehicle's low-voltage circuits. When the primary power supply is normal, a second output signal is used to supply power to the low-voltage circuits, enabling the primary power supply to power the vehicle's low-voltage circuits. When the primary power supply is abnormal, a fourth output signal is used to supply power to the low-voltage circuits, enabling the backup power supply to power the vehicle's low-voltage circuits. This reduces the possibility of the vehicle's low-voltage circuits malfunctioning due to power failure, thereby improving the stability of the vehicle system and advanced driver assistance system. It also solves the problem in the prior art where a fixed power supply to the vehicle's low-voltage circuits leads to malfunctions due to a fixed power supply failure, which in turn causes malfunctions in the vehicle system and advanced driver assistance system.

[0030] It should be noted that the main power source can be a battery, a power source formed by converting the battery voltage, or a converted power source, such as the power source formed by the regenerative braking of a hybrid vehicle, which converts the mechanical energy of vehicle deceleration and coasting into electrical energy. The voltage value of the first output signal provided by the main power source can be 12V, the first supply voltage value of the vehicle's low-voltage domain circuit can be 5V, and the voltage value of the second output signal can be 5V. The backup power source can be a battery, a power source formed by converting the battery voltage, or a converted power source, such as the power source formed by the regenerative braking of a hybrid vehicle, which converts the mechanical energy of vehicle deceleration and coasting into electrical energy. The voltage value of the third output signal provided by the backup power source can be 12V, and the voltage value of the fourth output signal can be 5V.

[0031] The status signal of the first control module indicates that the first control module is working normally.

[0032] Main power supply failure (abnormality) includes abnormal first voltage of the first output signal. Abnormal first voltage of the first output signal includes undervoltage, overvoltage, and voltage oscillation. Undervoltage refers to the first voltage value of the first output signal being lower than the standard voltage value (e.g., 12V). Overvoltage refers to the first voltage value of the first output signal being higher than the standard voltage value (e.g., 12V). Voltage oscillation refers to the first voltage fluctuation amplitude of the first output signal being greater than a preset amplitude value (e.g., 0.1V). The amplitude of the first voltage fluctuation is the change value of the first voltage within a preset statistical time. For example, if the range of the first voltage change within the preset statistical time is 11.5V to 12.5V, then the change value of the first voltage within the preset statistical time is 1V (12.5V minus 11.5V), that is, the amplitude of the first voltage fluctuation is 1V.

[0033] The low-voltage domain circuit of a vehicle can be the circuit in the electronic control unit (ECU), which is the on-board computer and consists of a microcontroller and peripheral circuits.

[0034] Optional, refer to Figure 2In some embodiments, the second control module includes a second switch module, a second voltage conversion chip, and a second microcontroller; the backup power supply is specifically used to send the third output signal to the second voltage conversion chip; the second microcontroller is used to send a closing command to the second switch module if the status signal is not received within the preset time period; the second switch module is used to control the second voltage conversion chip to enter the power supply mode upon receiving the closing command; the second voltage conversion chip is used to convert the third output signal into the fourth output signal and supply power to the low-voltage domain circuit when in the power supply mode.

[0035] In this embodiment, a third output signal is sent to the second voltage conversion chip via a backup power supply. If the second microcontroller does not receive a status signal within a preset time period, it sends a closing command to the second switch module. Upon receiving the closing command, the second switch module controls the second voltage conversion chip to enter the power supply mode. In the power supply mode, the second voltage conversion chip converts the third output signal into a fourth output signal and uses the fourth output signal to power the low-voltage domain circuit. This ensures that if no status signal is received within a preset time period, it indicates that the main power supply is abnormal, and the backup power supply is used to power the vehicle's low-voltage domain circuit.

[0036] It should be noted that the second switching module can be a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor); the second microcontroller can be a microcontroller unit (MCU). An MCU integrates peripheral interfaces such as memory counters, universal serial buses (USB), and analog-to-digital (A / D) converters onto a single chip, forming a chip-level computer.

[0037] The second voltage conversion chip can be supplied with 12V. The model of the second voltage conversion chip can be LTF35584. The LTF35584 chip is a high efficient power management integrated circuit, which can convert 12V voltage to 5V or 3.3V.

[0038] Optional, refer to Figure 2In some embodiments, the first control module includes a first switch module, a first voltage conversion chip, and a first microcontroller; the first switch module is used to control the conduction of the main power supply and the first voltage conversion chip; the main power supply is used to send the first output signal to the first voltage conversion chip when it is conducting with the first voltage conversion chip; the first voltage conversion chip is used to convert the voltage value of the first output signal into the first supply voltage value when the first voltage is detected to be normal, obtain the second output signal, and supply power to the low-voltage domain circuit; the first voltage conversion chip is also used to convert the voltage value of the first output signal into the second supply voltage value of the first microcontroller, obtain the fifth output signal, and supply power to the first microcontroller; and to stop converting the first output signal into the fifth output signal when the first voltage is abnormal; the first microcontroller is used to send the status signal to the second control module when it receives the fifth output signal; and to stop sending the status signal to the second control module when it does not receive the fifth output signal within a preset time period.

[0039] In this embodiment, the main power supply and the first voltage conversion chip are controlled by a first switching module. When the main power supply is connected to the first voltage conversion chip, it sends a first output signal to the first voltage conversion chip. When the first voltage is detected to be normal, the first voltage conversion chip converts the voltage value of the first output signal into a first supply voltage value, obtains a second output signal, and supplies power to the low-voltage domain circuit. The first voltage conversion chip converts the voltage value of the first output signal into a second supply voltage value for the first microcontroller, obtains a fifth output signal, and supplies power to the first microcontroller. In the event of an abnormal first voltage, the conversion of the first output signal into the fifth output signal is stopped. When the first microcontroller receives the fifth output signal, it sends a status signal to the second control module. If the first microcontroller does not receive the fifth output signal within a preset time, it stops sending the status signal to the second control module. Thus, in the event of an abnormal main power supply, by stopping the sending of the status signal to the second control module, the second control module uses a backup power supply to power the low-voltage domain circuit of the vehicle if it does not receive the status signal within a preset time.

[0040] It should be noted that the first switching module can be a field-effect transistor, the power supply voltage of the first voltage conversion chip can be 12V, the model of the first voltage conversion chip can be LTF35584, the first microcontroller can be a microcontroller unit, and the second power supply voltage value of the first microcontroller can be 3.3V.

[0041] Optionally, in some embodiments, the first microcontroller is further configured to send a control signal to the second voltage conversion chip upon receiving the fifth output signal; the second voltage conversion chip is configured to enter a low-power mode upon receiving the control signal and stop converting the third output signal into the fourth output signal.

[0042] In this embodiment of the application, when the first microcontroller receives the fifth output signal, it sends a control signal to the second voltage conversion chip. When the second voltage conversion chip receives the control signal, it enters a low-power mode and stops converting the third output signal into the fourth output signal. At this time, the backup power supply does not supply power to the low-voltage domain circuit of the vehicle, but uses the main power supply to supply power to the low-voltage domain circuit of the vehicle. That is, when the main power supply is normal, the backup power supply is not used to supply power to the low-voltage domain circuit of the vehicle.

[0043] It should be noted that the low-power mode is also known as the stand-by mode. When the second voltage conversion chip is in the low-power mode, the second voltage conversion chip stops converting the third output signal into the fourth output signal, so as not to use the backup power supply to power the low-voltage domain circuit of the vehicle.

[0044] The second microcontroller can also send a status signal (indicating normal operation of the second microcontroller) to the first microcontroller at preset time intervals. A counter counts the number of times the first microcontroller receives the status signal from the second microcontroller, allowing the first microcontroller to know that the second microcontroller is working properly. This enables the first microcontroller to determine whether the second voltage conversion chip is working properly and thus determine whether the backup power supply is normal. Therefore, when the first microcontroller receives the status signal from the second microcontroller, it determines that the backup power supply is normal and sends a control signal to the second voltage conversion chip. Upon receiving the control signal, the second voltage conversion chip enters a low-power mode and stops converting the third output signal into the fourth output signal. At this time, the backup power supply does not supply power to the low-voltage circuit of the vehicle, but uses the main power supply to supply power to the low-voltage circuit of the vehicle.

[0045] Optionally, in some embodiments, the first voltage conversion chip is further configured to convert the voltage value of the first output signal into a third power supply voltage value for the second microcontroller, thereby obtaining a sixth output signal and supplying power to the second microcontroller.

[0046] In this embodiment of the application, the voltage value of the first output signal is converted into the third power supply voltage value of the second microcontroller by the first voltage conversion chip, and the sixth output signal is obtained and power is supplied to the second microcontroller to ensure that the second microcontroller can work normally.

[0047] Specifically, in some embodiments, the third power supply voltage of the second microcontroller is 3.3V; in other embodiments, the third power supply voltage of the second microcontroller is 5V.

[0048] Optionally, in some embodiments, the second voltage conversion chip is further configured to convert the voltage value of the third output signal into the third power supply voltage value of the second microcontroller, thereby obtaining a seventh output signal and supplying power to the second microcontroller.

[0049] In this embodiment, the voltage value of the third output signal is converted into the third power supply voltage value of the second microcontroller by the second voltage conversion chip, and the seventh output signal is obtained and powered to the second microcontroller. This forms a redundant power supply with the power supply to the second microcontroller through the first voltage conversion chip, ensuring that the backup power supply can continue to power the second microcontroller in the event of a main power failure. In turn, the backup power supply can be controlled by the second microcontroller to power the low-voltage circuit of the vehicle.

[0050] Optionally, in some embodiments, the second switch module is specifically used to connect the output pin of the backup power supply to the control pin of the second voltage conversion chip when the closing command is received; the backup power supply is also used to send a restart signal to the control pin of the second voltage conversion chip when the output pin of the backup power supply is connected to the control pin of the second voltage conversion chip; the control pin of the second voltage conversion chip is used to control the second voltage conversion chip to restart and enter the power supply mode when the restart signal is received.

[0051] In this embodiment, when the second switch module receives a closing command, it connects the output pin of the backup power supply with the control pin of the second voltage conversion chip. When the output pin of the backup power supply is connected to the control pin of the second voltage conversion chip, the backup power supply sends a restart signal to the control pin of the second voltage conversion chip. The control pin of the second voltage conversion chip is used to control the second voltage conversion chip to restart and enter the power supply mode when the restart signal is received, so as to enable the backup power supply to power the low-voltage circuit of the vehicle in the event of a main power failure.

[0052] It should be noted that the voltage value of the restart signal provided by the backup power supply is the same as the voltage value of the third output signal provided by the backup power supply. The voltage value of the restart signal can be 12V. When the second switching module is a field-effect transistor, such as an N-channel field-effect transistor (NMOS transistor), the drain of the NMOS transistor is connected to the output pin of the third output signal of the backup power supply, the gate of the NMOS transistor is connected to the pin of the second microcontroller that outputs the closing command, and the source of the NMOS transistor is connected to the control pin of the second voltage conversion chip. This enables the second switching module to conduct the output pin of the backup power supply and the control pin of the second voltage conversion chip when it receives the closing command. When the output pin of the backup power supply and the control pin of the second voltage conversion chip are conducting, the backup power supply sends a restart signal (i.e., a high-level signal) to the control pin of the second voltage conversion chip.

[0053] Optionally, in some embodiments, the first control module is specifically used to send the status signal to the second control module once every preset time interval when the first voltage is normal.

[0054] In this embodiment, when the first voltage is normal, the first control module sends a status signal to the second control module every preset time interval to keep the second voltage conversion chip in a low-power mode. This allows the main power supply to supply power to the low-voltage circuit of the vehicle when the main power supply is normal, without using the backup power supply.

[0055] It should be noted that the preset time interval can be 10 milliseconds.

[0056] Specifically, in some embodiments, the first microcontroller is specifically used to send the status signal to the second microcontroller once every preset time interval when the first voltage is normal, and a counter counts (the second microcontroller records the number of times it receives the status signal from the first microcontroller).

[0057] Optionally, in some embodiments, the first control module is further configured to stop converting the first output signal into the second output signal in the event of an abnormal first voltage.

[0058] In this embodiment of the application, the first control module stops converting the first output signal into the second output signal when the first voltage is abnormal, so that in the event of a main power supply failure, the main power supply to the low-voltage domain circuit of the vehicle is stopped, thereby ensuring that the low-voltage domain circuit is not affected by the faulty main power supply.

[0059] Optionally, in some embodiments, the second control module is further configured to convert the third output signal into the fourth output signal when the second voltage of the third output signal is detected to be normal; and to stop converting the third output signal into the fourth output signal when the second voltage of the third output signal is detected to be abnormal.

[0060] In this embodiment, the second control module converts the third output signal into a fourth output signal when the second voltage of the third output signal is detected to be normal, and stops converting the third output signal into a fourth output signal when the second voltage of the third output signal is detected to be abnormal. This ensures that the backup power supply to the low-voltage domain circuit of the vehicle is stopped in the event of a backup power failure, thereby ensuring that the low-voltage domain circuit is not affected by the faulty backup power supply.

[0061] In summary, in this embodiment, the power switching system includes a main power supply, a first control module, a backup power supply, and a second control module. The main power supply sends a first output signal to the first control module. The first control module, upon detecting that the first voltage of the first output signal is normal, converts the voltage value of the first output signal into a first supply voltage value for the low-voltage domain circuit of the vehicle, obtains a second output signal, and supplies power to the low-voltage domain circuit. The first control module is also used to send a status signal to the second control module when the first voltage is normal, and to stop sending the status signal to the second control module when detecting that the first voltage of the first output signal is abnormal. The backup power supply sends a third output signal to the second control module. This system is used to convert the voltage value of the third output signal into the first supply voltage value when no status signal is received within a preset time period, obtain the fourth output signal, and supply power to the low-voltage domain circuit. This enables the use of a main and backup power supply to power the vehicle's low-voltage domain circuit. In other words, in the event of an abnormality in the main power supply, the backup power supply is used to power the vehicle's low-voltage domain circuit, reducing the possibility of the vehicle's low-voltage domain circuit malfunctioning due to power failure. This improves the stability of the vehicle system and advanced driver assistance system, and solves the problem in the prior art where the fixed power supply to the vehicle's low-voltage domain circuit causes the low-voltage domain circuit to malfunction due to a fixed power supply failure, which in turn causes malfunctions in the vehicle system and advanced driver assistance system.

[0062] Figure 3 This is a flowchart illustrating the steps of a power switching method provided in an embodiment of this application, as follows: Figure 3 As shown, the method may include:

[0063] Step 101: Generate a first output signal through the vehicle's main power supply, and generate a third output signal through the vehicle's backup power supply.

[0064] In this embodiment, a first output signal is generated by the vehicle's main power supply, and a third output signal is generated by the vehicle's backup power supply. The main and backup power supplies are then used to power the vehicle's low-voltage circuits, ensuring the normal operation of the vehicle system and the advanced driver assistance system.

[0065] The implementation method for this step is similar to the aforementioned process, and will not be repeated here.

[0066] Step 102: When the first voltage of the first output signal is detected to be normal, the voltage value of the first output signal is converted into the first power supply voltage value of the low voltage domain circuit of the vehicle, a second output signal is obtained and power is supplied to the low voltage domain circuit, and a status signal is generated.

[0067] In this embodiment of the application, when the first voltage of the first output signal is detected to be normal, the voltage value of the first output signal is converted into the first power supply voltage value of the low voltage domain circuit of the vehicle, a second output signal is obtained and power is supplied to the low voltage domain circuit, and a status signal is generated. Then, if the status signal is not detected within a preset time, it indicates that the main power supply is faulty, and the backup power supply is used to supply power to the low voltage domain circuit of the vehicle.

[0068] The implementation method for this step is similar to the aforementioned process, and will not be repeated here.

[0069] Step 103: If a first voltage abnormality is detected in the first output signal, stop generating the status signal. If the status signal is not detected within a preset time period, convert the voltage value of the third output signal into the first power supply voltage value to obtain a fourth output signal and supply power to the low voltage domain circuit.

[0070] In this embodiment, when a first voltage abnormality is detected in the first output signal, the generation of the status signal is stopped, and if no status signal is detected within a preset time, the voltage value of the third output signal is converted into the first power supply voltage value to obtain the fourth output signal and supply power to the low-voltage domain circuit. This achieves the use of a main and backup power supply to power the low-voltage domain circuit, ensuring the normal operation of the vehicle system and the advanced driver assistance system.

[0071] The implementation method for this step is similar to the aforementioned process, and will not be repeated here.

[0072] The embodiments of this application enable the use of a primary and backup power supply to power the low-voltage domain circuits of a vehicle. In the event of a failure in the primary power supply, a backup power supply is used to power the low-voltage domain circuits, reducing the likelihood of the low-voltage domain circuits malfunctioning due to power supply failure. This improves the stability of the vehicle system and advanced driver assistance system, and solves the problem in the prior art where the fixed power supply for the low-voltage domain circuits causes malfunctions in the low-voltage domain circuits due to a fixed power supply failure, which in turn leads to malfunctions in the vehicle system and advanced driver assistance system.

[0073] This application provides a vehicle that includes the aforementioned power switching system to implement the aforementioned power switching method.

[0074] The implementation method of this application embodiment is similar to the aforementioned implementation process, and will not be repeated here.

[0075] In this embodiment, the power switching system includes a main power supply, a first control module, a backup power supply, and a second control module. The main power supply sends a first output signal to the first control module. The first control module, when detecting a normal first voltage of the first output signal, converts the voltage value of the first output signal into a first supply voltage value for the low-voltage domain circuit of the vehicle, obtains a second output signal, and supplies power to the low-voltage domain circuit. The first control module is also used to send a status signal to the second control module when the first voltage is normal, and to stop sending the status signal to the second control module when detecting an abnormal first voltage of the first output signal. The backup power supply sends a third output signal to the second control module. The second control module is used for... If no status signal is received within a preset time period, the voltage value of the third output signal is converted into the first supply voltage value to obtain the fourth output signal and supply power to the low-voltage domain circuit. This enables the use of a main and backup power supply to power the vehicle's low-voltage domain circuit. In other words, if the main power supply fails, the backup power supply is used to power the vehicle's low-voltage domain circuit, reducing the possibility of the vehicle's low-voltage domain circuit malfunctioning due to power failure. This improves the stability of the vehicle system and advanced driver assistance system and solves the problem in the prior art where the power supply to the vehicle's low-voltage domain circuit is fixed, causing the low-voltage domain circuit to malfunction due to the failure of the fixed power supply, which in turn causes malfunctions in the vehicle system and advanced driver assistance system.

[0076] It should be noted that a cockpit-driver integration system refers to a system that integrates and optimizes the vehicle's cockpit and powertrain. In a cockpit-driver integration system, power supply design plays a crucial role, involving providing a stable and reliable power supply to the entire system. The power switching system provided in this embodiment of the invention can be applied to cockpit-driver integration systems. This system manages and switches between different power supplies to ensure system reliability and stability, serving as both power management and fault switching to meet the power demands under different operating conditions.

[0077] Optionally, such as Figure 4 As shown, this application embodiment also provides an electronic device 400, including a processor 401 and a memory 402. The memory 402 stores a program or instructions that can run on the processor 401. When the program or instructions are executed by the processor 401, they implement the various steps of the above-described power switching method embodiment and can achieve the same technical effect. To avoid repetition, they will not be described again here.

[0078] It should be noted that the electronic devices in the embodiments of this application include the mobile electronic devices and non-mobile electronic devices described above.

[0079] Figure 5 A schematic diagram of the hardware structure of an electronic device to implement an embodiment of this application.

[0080] The electronic device 1000 includes, but is not limited to, components such as: radio frequency unit 1001, network module 1002, audio output unit 1003, input unit 1004, sensor 1005, display unit 1006, user input unit 1007, interface unit 1008, memory 1009, and processor 1010.

[0081] Those skilled in the art will understand that the electronic device 1000 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 1010 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 5 The electronic device structure shown does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0082] Thus, in this embodiment, a primary and backup power supply is used to power the vehicle's low-voltage circuits. That is, in the event of a failure in the primary power supply, a backup power supply is used to power the vehicle's low-voltage circuits. This reduces the possibility of the vehicle's low-voltage circuits malfunctioning due to power supply failure, thereby improving the stability of the vehicle system and advanced driver assistance system. It also solves the problem in the prior art where the power supply for the vehicle's low-voltage circuits is fixed, leading to malfunctions in the vehicle's low-voltage circuits due to the failure of the fixed power supply, which in turn causes malfunctions in the vehicle system and advanced driver assistance system.

[0083] It should be understood that, in this embodiment, the input unit 1004 may include a graphics processing unit (GPU) 1041 and a microphone 1042. The GPU 1041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 1006 may include a display panel 1061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 1007 includes at least one of a touch panel 1071 and other input devices 1072. The touch panel 1071 is also called a touch screen. The touch panel 1071 may include a touch detection device and a touch controller. Other input devices 1072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0084] The memory 1009 can be used to store software programs and various data. The memory 1009 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 1009 may include volatile memory or non-volatile memory, or both. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus RAM (DRRAM). The memory 1009 in this embodiment includes, but is not limited to, these and any other suitable types of memory.

[0085] The processor 1010 may include one or more processing units; optionally, the processor 1010 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into the processor 1010.

[0086] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described power switching method embodiments and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0087] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0088] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above power switching method embodiment and achieve the same technical effect. To avoid repetition, it will not be described again here.

[0089] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0090] This application provides a computer program product stored in a storage medium. The program product is executed by at least one processor to implement the various processes of the power switching method embodiment described above, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0091] It should be noted that, 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 apparatus 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 apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0092] 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 computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0093] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A power switching system, characterized in that, The system includes a main power supply, a first control module, a backup power supply, and a second control module; the first control module includes a first switch module, a first voltage conversion chip, and a first microcontroller; the second control module includes a second switch module, a second voltage conversion chip, and a second microcontroller. The main power supply is used to send a first output signal to the first control module; The first control module is used to convert the voltage value of the first output signal into the first power supply voltage value of the low voltage domain circuit of the vehicle when the first voltage of the first output signal is detected to be normal, obtain the second output signal and supply power to the low voltage domain circuit. The first control module is also configured to send a status signal to the second control module when the first voltage is normal, and to stop sending the status signal to the second control module when an abnormal first voltage of the first output signal is detected. The backup power supply is used to send a third output signal to the second control module; The second control module is used to convert the voltage value of the third output signal into the first power supply voltage value, obtain the fourth output signal and supply power to the low voltage domain circuit if the status signal is not received within a preset time period. The first switch module is used to control the conduction between the main power supply and the first voltage conversion chip; The main power supply is used to send the first output signal to the first voltage conversion chip when it is connected to the first voltage conversion chip; The first voltage conversion chip is used to convert the voltage value of the first output signal into the first power supply voltage value when the first voltage is detected to be normal, to obtain the second output signal and supply power to the low voltage domain circuit; The first voltage conversion chip is also used to convert the voltage value of the first output signal into the second power supply voltage value of the first microcontroller, obtain the fifth output signal and supply power to the first microcontroller; and to stop converting the first output signal into the fifth output signal when the first voltage is abnormal. The first microcontroller is used to send the status signal to the second control module when it receives the fifth output signal; and to stop sending the status signal to the second control module if it does not receive the fifth output signal within the preset time period. The first voltage conversion chip is also used to convert the voltage value of the first output signal into the third power supply voltage value of the second microcontroller, obtain the sixth output signal, and supply power to the second microcontroller.

2. The power switching system according to claim 1, characterized in that, The backup power supply is specifically used to send the third output signal to the second voltage conversion chip; The second microcontroller is used to send a closing command to the second switch module if it does not receive the status signal within the preset time period; The second switch module is used to control the second voltage conversion chip to enter the power supply mode upon receiving the closing command; The second voltage conversion chip is used to convert the third output signal into the fourth output signal and supply power to the low-voltage domain circuit when in power supply mode.

3. The power switching system according to claim 1, characterized in that, The first microcontroller is also used to send a control signal to the second voltage conversion chip when it receives the fifth output signal; The second voltage conversion chip is used to enter a low-power mode and stop converting the third output signal into the fourth output signal when it receives the control signal.

4. The power switching system according to claim 2, characterized in that, The second voltage conversion chip is also used to convert the voltage value of the third output signal into the third power supply voltage value of the second microcontroller, obtain the seventh output signal, and supply power to the second microcontroller.

5. The power switching system according to claim 2, characterized in that, The second switch module is specifically used to connect the output pin of the backup power supply to the control pin of the second voltage conversion chip upon receiving the closing command; The backup power supply is also used to send a restart signal to the control pin of the second voltage conversion chip when the output pin of the backup power supply is connected to the control pin of the second voltage conversion chip. The control pin of the second voltage conversion chip is used to control the second voltage conversion chip to restart and enter the power supply mode when the restart signal is received.

6. The power switching system according to claim 1, characterized in that, Specifically, the first control module is used to send the status signal to the second control module once every preset time interval when the first voltage is normal; and / or, the first control module is also used to stop converting the first output signal into the second output signal when the first voltage is abnormal.

7. The power switching system according to claim 1, characterized in that, The second control module is further configured to convert the third output signal into the fourth output signal when the second voltage of the third output signal is detected to be normal; and to stop converting the third output signal into the fourth output signal when the second voltage of the third output signal is detected to be abnormal.

8. A power switching method, characterized in that, The method includes: A first output signal is generated by the vehicle's main power supply, and a third output signal is generated by the vehicle's backup power supply. The first control module controls the connection between the main power supply and the first voltage conversion chip through the first switching module; the first control module includes the first switching module, the first voltage conversion chip, and the first microcontroller. When the main power supply is turned on and the first voltage conversion chip is connected, the first output signal is sent to the first voltage conversion chip; When the first voltage of the first output signal is detected to be normal, the voltage value of the first output signal is converted into the first power supply voltage value of the low voltage domain circuit of the vehicle using the first voltage conversion chip, a second output signal is obtained and power is supplied to the low voltage domain circuit, and a status signal is generated. If a first voltage abnormality is detected in the first output signal, the generation of the status signal is stopped, and if the status signal is not detected within a preset time, the voltage value of the third output signal is converted into the first power supply voltage value to obtain a fourth output signal and supply power to the low voltage domain circuit. Specifically, the voltage value of the first output signal is converted into the second power supply voltage value of the first microcontroller by the first voltage conversion chip to obtain the fifth output signal and supply power to the first microcontroller; and in the event of an abnormal first voltage, the conversion of the first output signal into the fifth output signal is stopped. When the first microcontroller receives the fifth output signal, it sends the status signal to the second control module; if the fifth output signal is not received within the preset time period, it stops sending the status signal to the second control module; the second control module includes a second switch module, a second voltage conversion chip, and a second microcontroller; The voltage value of the first output signal is converted into the third power supply voltage value of the second microcontroller by the first voltage conversion chip, and a sixth output signal is obtained and supplied to the second microcontroller.

9. An electronic device, characterized in that, It includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the power switching method as described in claim 8.

10. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the steps of the power switching method as described in claim 8.

11. A vehicle, characterized in that, The system includes a power switching system as described in any one of claims 1 to 7 to implement the power switching method as described in claim 8.

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