Power distribution method and apparatus for vehicle domain controller, and storage medium

Abstract

The present disclosure provides a power distribution method and apparatus for a vehicle domain controller, and a storage medium. The method comprises: acquiring a load current corresponding to a sampling resistor; in response to the load current satisfying a preset power distribution condition, determining a target power distribution strategy on the basis of the load current; and using the target power distribution strategy to perform power distribution processing on a target domain controller, wherein the target domain controller is used for representing a next-level domain controller corresponding to a current domain controller. The present disclosure solves the technical problem in the related art of low safety of power distribution strategies of vehicle domain controllers.

Description

Power distribution method and device of vehicle domain controller and storage medium TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of vehicles, and in particular, to a power distribution method and device of a vehicle domain controller and a storage medium. BACKGROUND

[0002] With the rapid development of automotive electronics technology, the number of power modules in the internal electronic system of an automobile increases, and the function of domain controllers is enhanced. For example, domain controllers such as body control modules, chassis control modules, and infotainment systems have higher requirements for the stability and safety of the automobile power supply system.

[0003] However, in the current automobile power supply system, the traditional power distribution scheme of the vehicle domain controller has the following problems in the key processes of power-on self-test, normal driving, hibernation, and wake-up of the domain controller: (1) the unreasonable power distribution strategy leads to a decline in the performance of the domain controller, and even causes serious problems such as overcurrent, which poses a threat to the safety of drivers and passengers; (2) the handling of the overcurrent problem often relies on simple fuses or fuses, which can prevent damage caused by overcurrent to a certain extent, but have slow response, large volume, large tolerance, and need to be replaced after melting to continue to be used, resulting in high maintenance costs.

[0004] At present, there is no effective solution to the above problems. SUMMARY

[0005] The embodiments of the present disclosure provide a power distribution method and device of a vehicle domain controller and a storage medium to at least solve the technical problem of low safety of the power distribution strategy of the vehicle domain controller in the related art.

[0006] According to an embodiment of the present disclosure, a power distribution method of a vehicle domain controller is provided, including: obtaining a load current corresponding to a sampling resistor; in response to the load current satisfying a preset power distribution condition, determining a target power distribution strategy based on the load current; and performing power distribution processing on a target domain controller using the target power distribution strategy, wherein the target domain controller is used to represent a next level domain controller corresponding to a current domain controller.

[0007] Optionally, the power distribution method of the vehicle domain controller further includes: in response to the target vehicle being powered on, performing initialization processing on a circuit protection chip of the target vehicle to obtain an initialization result, wherein the initialization result is used to set a target pin of the circuit protection chip to a first level, and the target pin is used to connect an external semiconductor transistor.

[0008] Optionally, the preset power distribution condition is used to represent that the load current is less than a first current threshold.

[0009] Optionally, the power distribution method of the vehicle domain controller further includes: in response to the load current not satisfying the preset power distribution condition, switching the first level of the target pin to a second level based on the load current, so that the external semiconductor transistor is in an off state, wherein the first level is higher than the second level.

[0010] Optionally, in response to the load current satisfying the preset power distribution condition, determining the target power distribution strategy based on the load current includes: in response to the load current satisfying the preset power distribution condition, controlling the target pin to maintain the first level based on the load current, so that the external semiconductor transistor is in a connected state; and in response to the external semiconductor transistor being in the connected state, continuously supplying power to the target domain controller.

[0011] Optionally, the power distribution method of the vehicle domain controller further includes: in response to the current domain controller being in a sleep state, obtaining a bypass voltage corresponding to the circuit protection chip; determining a bypass current based on the bypass voltage; and in response to the bypass current satisfying a preset wake-up condition, sending a wake-up signal to the current domain controller.

[0012] Optionally, obtaining the bypass voltage corresponding to the circuit protection chip includes: obtaining a supply voltage and an output voltage corresponding to the circuit protection chip; and determining the bypass voltage based on a difference between the supply voltage and the output voltage.

[0013] Optionally, the preset wake-up condition is used to indicate that the bypass current is greater than a second current threshold.

[0014] According to an embodiment of the present disclosure, a power distribution device of a vehicle domain controller is also provided, which includes: an obtaining module configured to obtain a load current corresponding to a sampling resistor; a determining module configured to determine a target power distribution strategy based on the load current in response to the load current satisfying a preset power distribution condition; and a processing module configured to perform power distribution processing on a target domain controller using the target power distribution strategy, wherein the target domain controller is used to indicate a next level domain controller corresponding to a current domain controller.

[0015] Optionally, the processing module is further configured to: in response to the target vehicle being powered on, perform initialization processing on a circuit protection chip of the target vehicle to obtain an initialization result, wherein the initialization result is used to set a target pin of the circuit protection chip to a first level, and the target pin is used to connect an external semiconductor transistor.

[0016] Optionally, the preset power distribution condition is used to indicate that the load current is less than a first current threshold.

[0017] Optionally, the processing module is further configured to: in response to the load current not satisfying the preset power distribution condition, switch the first level of the target pin to a second level based on the load current, so that the external semiconductor transistor is in an off state, wherein the first level is higher than the second level.

[0018] Optionally, the determining module is further configured to, in response to the load current satisfying the preset power distribution condition, keep the target pin at the first level based on the load current, so as to make the external semiconductor transistor in the connection state; and in response to the external semiconductor transistor being in the connection state, continuously supply power to the target domain controller.

[0019] Optionally, the obtaining module is further configured to, in response to the current domain controller being in the sleep state, obtain a bypass voltage corresponding to the circuit protection chip; the determining module is further configured to determine a bypass current based on the bypass voltage; and the processing module is further configured to, in response to the bypass current satisfying a preset wake-up condition, send a wake-up signal to the current domain controller.

[0020] Optionally, the obtaining module is further configured to obtain a supply voltage and an output voltage corresponding to the circuit protection chip; and the determining module is further configured to determine the bypass voltage based on a difference between the supply voltage and the output voltage.

[0021] Optionally, the preset wake-up condition is used to indicate that the bypass current is greater than a second current threshold.

[0022] According to an embodiment of the present disclosure, a non-volatile storage medium is further provided, and the non-volatile storage medium stores a computer program. The computer program is configured to execute the power distribution method of the vehicle domain controller when running.

[0023] According to an embodiment of the present disclosure, a computer program product is further provided, and the computer program product includes computer instructions. The computer instructions are executed by a processor to implement the power distribution method of the vehicle domain controller.

[0024] According to an embodiment of the present disclosure, an electronic device is further provided, and the electronic device includes a processor and a memory for storing processor-executable instructions. The processor is configured to execute the instructions to implement the power distribution method of the vehicle domain controller.

[0025] In the embodiments of the present disclosure, the load current corresponding to the sampling resistor is obtained, the target power distribution strategy is determined based on the load current in response to the load current satisfying the preset power distribution condition, and finally the target domain controller is powered by using the target power distribution strategy. Thus, the purposes of protecting the domain controller circuit and improving the integration of the vehicle power supply system are achieved, the technical effect of improving the safety of the power distribution strategy of the vehicle domain controller is achieved, and the technical problem of low safety of the power distribution strategy of the vehicle domain controller in the related art is solved. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings, which are included to provide a further understanding of the present disclosure and constitute a part of the present disclosure, illustrate the illustrative embodiments of the present disclosure and the description thereof, and do not limit the present disclosure. In the drawings:

[0027] Fig. 1 is a flow chart of a power distribution method of a vehicle domain controller according to an embodiment of the present disclosure;

[0028] Fig. 2 is a schematic diagram of a power distribution method of a vehicle domain controller according to an embodiment of the present disclosure;

[0029] Fig. 3 is a schematic diagram of a power distribution method of a vehicle domain controller according to another embodiment of the present disclosure;

[0030] Fig. 4 is a schematic diagram of a power distribution method of a vehicle domain controller according to another embodiment of the present disclosure;

[0031] Fig. 5 is a structural block diagram of a power distribution device of a vehicle domain controller according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0032] In order to make persons skilled in the art better understand the present disclosure, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without creative work should fall within the protection scope of the present disclosure.

[0033] It should be noted that the terms "first", "second", and the like in the specification and claims of the present disclosure and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to include only those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to the process, method, product or device.

[0034] The method embodiments can be executed in an electronic device or similar computing device comprising a memory and a processor. Taking an example of running on a vehicle terminal, the vehicle terminal can include one or more processors (the processor can include, but is not limited to, a processing device such as a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), a Digital Signal Processing (DSP) chip, a Micro Controller Unit (MCU), a Field Programmable Gate Array (FPGA), a Neural-network Processor Unit (NPU), a Tensor Processing Unit (TPU), an Artificial Intelligence (AI) type processor, etc.) and a memory for storing data. Optionally, the vehicle terminal can further include a transmission device for communication function, an input / output device, and a display device. Those skilled in the art can understand that the above structural description is only illustrative, and does not limit the structure of the vehicle terminal. For example, the vehicle terminal can include more or less components than the above structural description, or have a different configuration from the above structural description.

[0035] The memory can be used to store computer programs, for example, software programs of application software and modules, such as the computer program corresponding to the power distribution method of the vehicle domain controller in the embodiments of the present disclosure. The processor executes various functions and data processing by running the computer program stored in the memory, that is, implements the power distribution method of the vehicle domain controller. The memory can include a high-speed random access memory, and can also include a non-volatile memory, such as one or more magnetic storage devices, flash memories, or other non-volatile solid-state memories. In some examples, the memory can further include a memory remotely arranged with respect to the processor, which can be connected to the mobile terminal through a network. Examples of the above network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0036] The transmission device is configured to receive or transmit data via a network. The network can include, for example, a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device includes a network interface controller (NIC) that is configured to connect to other network devices via a base station to enable communication with the Internet. In one example, the transmission device can be a radio frequency (RF) module that is configured to communicate with the Internet via a wireless connection.

[0037] The display device can be, for example, a touch screen liquid crystal display (LCD) and a touch display (also referred to as a "touch screen" or "touch display screen"). The liquid crystal display can enable a user to interact with a user interface of the mobile terminal. In some embodiments, the mobile terminal has a graphical user interface (GUI) that a user can interact with via finger contacts and / or gestures on the touch-sensitive surface. The user interactions can optionally include one or more of the following: creating a webpage, drawing, text editing, composing an email, playing a game, viewing a video, performing a search, making a telephone call, composing a text message, and / or any other function operable by the mobile terminal. The executable instructions for performing the user interactions can be stored in a computer program product or a readable storage medium that is executable by one or more processors of the mobile terminal.

[0038] According to the embodiments of the present disclosure, a method for power distribution of a vehicle domain controller is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0039] FIG. 1 is a flowchart of a method for power distribution of a vehicle domain controller according to an embodiment of the present disclosure. As shown in FIG. 1, the method includes the following steps:

[0040] In step S101, a load current corresponding to a sampling resistance is obtained.

[0041] In step S102, in response to the load current satisfying a preset power distribution condition, a target power distribution strategy is determined based on the load current.

[0042] In step S103, the target domain controller is powered using the target power distribution strategy, wherein the target domain controller is used to represent a next level domain controller corresponding to the current domain controller.

[0043] Specifically, the sampling resistor is used to monitor the load current in real time, and the current is fed back to the ISNS_P pin and the ISNS_N pin of the electronic fuse (EFUSE) chip. The EFUSE chip determines whether the load current meets the preset power distribution condition. When the load current meets the preset power distribution condition, the target power distribution strategy is determined based on the load current. The target power distribution strategy is used to perform power distribution processing on the next level domain controller corresponding to the current domain controller.

[0044] Based on the above steps S101 to S103, the load current corresponding to the sampling resistor is obtained, and the target power distribution strategy is determined based on the load current in response to the load current meeting the preset power distribution condition. Finally, the target power distribution strategy is used to perform power distribution processing on the target domain controller, achieving the purpose of protecting the domain controller circuit and improving the integration of the vehicle power supply system, thereby realizing the technical effect of improving the safety of the vehicle domain controller power distribution strategy, and further solving the technical problem of low safety of the vehicle domain controller power distribution strategy in the related art.

[0045] Optionally, the above-mentioned power distribution method of the vehicle domain controller further comprises:

[0046] In step S104, the circuit protection chip of the target vehicle is initialized in response to the power-on of the target vehicle, and an initialization result is obtained. The initialization result is used to set the target pin of the circuit protection chip to a first level, and the target pin is used to connect an external semiconductor transistor.

[0047] In step S104, the above-mentioned circuit protection chip is used to represent the electronic fuse EFUSE chip. The EFUSE chip can diagnose voltage, current, temperature, etc. in real time, and has the advantages of miniaturization, reset control after shutdown, low power consumption, functional safety design, high reliability, waterproof design, etc.

[0048] The above-mentioned target pin is used to represent the HS_GATE pin of the EFUSE chip. The HS_GATE pin is used to connect an external negative temperature coefficient (NTC) or other control device, to control the on-off of the circuit or provide temperature protection.

[0049] The above-mentioned first level is used to represent a high level.

[0050] The semiconductor transistor is used for characterizing an N-type MOS transistor (NMOS transistor) in a Metal-Oxide-Semiconductor Field-Effect Transistor (MOS transistor). The NMOS transistor is a semiconductor device that does not conduct between a drain and a source when a gate voltage is 0 or less than a certain threshold voltage, and forms a conductive channel between the drain and the source when the gate voltage is greater than the threshold voltage. In the NMOS transistor, electrons participate in conduction.

[0051] Specifically, when the target vehicle is powered on, the EFUSE chip of the target vehicle is initialized, the HS_GATE pin of the EFUSE chip is set to high level, and the HS_GATE pin is connected to an external NMOS transistor.

[0052] Specifically, FIG. 2 is a schematic diagram of a power distribution method of a vehicle domain controller according to an embodiment of the present disclosure. As shown in FIG. 2, each pin in the electronic fuse EFUSE chip has a respective number. The VSPI 1 pin, the CSN 2 pin, the SDI 3 pin, the SDO 4 pin, the SCK 5 pin, the DIAG 6 pin, the TEST1 7 pin, the TEST2 8 pin, the NC1 9 pin, the HWLO 10 pin, the NC2 11 pin, the V3V3 12 pin, the GND 13 pin, the NC3 14 pin, the NC4 15 pin, the NC5 16 pin, the NC6 17 pin, the NTC_M 18 pin, the NTC 19 pin, the ISNS_N 20 pin, the ISNS_P 21 pin, the NC7 22 pin, the OUT 23 pin, the HS_GATE 24 pin, the VS 25 pin, the NC8 26 pin, the CP 27 pin, the CP2P 28 pin, the CP2M 29 pin, the CP1P 30 pin, the CP1M 31 pin, the NC9 32 pin, and the TAB 33 pin.

[0053] The V3V3 12 pin is an outgoing pin of an internal power supply of the EFUSE chip. The VDD_3V3 represents a working voltage of 3.3V provided for the EFUSE chip, ensuring that the chip can stably operate under a normal working voltage. The ISNS_P 21 pin and the ISNS_N 20 pin are current sensing pins, which are used to monitor the current passing through the EFUSE chip and are connected to an external current sensing resistor, thereby allowing the chip to monitor the current in the circuit in real time. The OUT 23 pin is connected to the output end of the electronic fuse EFUSE chip.

[0054] The electronic fuse EFUSE chip needs 2-way external power supply, that is, the EFUSE chip is powered by using the VS25 pin and the VSPI 1 pin. Since the circuit needs to maintain power supply externally in the sleep state, the VS pin and the VSPI 1 pin need to use long points. The VS25 pin needs a bypass decoupling capacitor, and the capacitor needs to be placed close to the pin. The VSPI 1 pin is selected to use 3.3V or 5V according to the interface level of the main control chip of the current domain controller.

[0055] The circuit communicates with the outside world and receives the instructions and register configuration instructions of the main control chip through the communication function of the serial peripheral interface (SPI) of the electronic fuse EFUSE chip. The CSN 2 pin, the SDI 3 pin, the SDO 4 pin, and the SCK 5 pin provide the SPI communication function.

[0056] The NTC 19 pin and the NTC_M 18 pin are thermistor pins, which are connected to a thermistor (NTC) for temperature monitoring and protection. The resistance value of the NTC resistor changes with temperature, allowing the chip to adjust its behavior or perform overheat protection according to temperature changes.

[0057] The DIAG 6 is a diagnostic pin, which is used for diagnosis, such as outputting internal signals or states for fault detection or debugging. The TEST1 7 pin and the TEST2 8 pin are test pins, which are usually used in the development and debugging stage, allowing developers to test or monitor certain functions or states inside the chip. If the HWLO = 1, the electronic fuse EFUSE chip switches from the self-test state to the locked state. The HS_GATE 24 pin is used to control the on-off of the high-side switch.

[0058] The GND 13 pin is a ground pin, which provides a ground connection for the EFUSE chip and is the reference point for the voltage of all other pins. The NC1 9 pin, the NC2 11 pin, the NC3 14 pin, the NC4 15 pin, the NC5 16 pin, the NC6 17 pin, the NC7 22 pin, the NC8 26 pin, and the NC9 32 pin indicate that the pin is not connected or not used. KL30 is used to represent the power supply of the electronic control unit (ECU) of the target vehicle.

[0059] The CP 27 pin is the main interface for EFUSE chip programming, used to write data into the EFUSE chip. The C interface is used to program important configuration information, keys, or other sensitive data into the EFUSE chip. The CP2P 28 pin is usually used for inter-chip programming or copy programming mode. The CP2P mode can accelerate the programming process of the chip, especially when the same configuration of chips needs to be programmed in batches. The CP2M 29 pin provides real-time visibility to the EFUSE chip programming process for monitoring the programming process. The CP1P 30 pin is used to program the chip in a normal production environment. The CP1M 31 pin is used to monitor the integrity and correctness of the data through the CP1M 31 path while transmitting the data through the CP1P 30 path. The CP 27 pin is the basis of chip programming, while the CP2P 28 pin and the CP2M 29 pin provide additional programming and monitoring options. These options make the EFUSE chip programming process more flexible and efficient, especially in scenarios that require batch programming or debugging. The CP1P 30 pin and the CP1M 31 pin together form the main and monitoring paths of chip programming. Through the coordinated work of the two paths, the accuracy and reliability of chip programming can be ensured.

[0060] Further, Fig. 3 is a schematic diagram of a power distribution method of another vehicle domain controller according to an embodiment of the present disclosure. As shown in Fig. 3, ISNS_N is a negative current detection pin for monitoring the negative component of the current in the circuit, which can provide information about the current in the circuit. NTC is a thermistor. The resistance value of the resistor decreases with the increase of temperature. R NTC is equal to the resistance value of NTC. V NTC represents the voltage related to NTC. V BG is a bandgap reference voltage source that provides a stable reference voltage for the circuit. R T_RER represents the resistance adjustment or compensation related to the resistance-temperature effect of NTC. To ADC is used to convert analog signals to digital signals, indicating that the voltage signal will be transmitted to an analog-to-digital converter (ADC) for digitization. NTC_M is a pin connected to NTC. R represents resistance. BIAS refers to bias voltage or bias current, which is used to set or adjust the operating point in the circuit to ensure that the circuit can work as expected. GND is the ground of the circuit, which is the reference point of all current loops.

[0061] To prevent the external MOS tube from being burned due to over-temperature, an NTC is selected to monitor the temperature of the external MOS tube in real time. The NTC is connected to the drain of the MOS, and the NTC should be placed as close to the MOS tube as possible to ensure accurate measurement of the temperature of the MOS tube. The voltage division value V NTCThe analog voltage signal is converted into a digital signal by a dedicated ADC. The result of the ADC conversion is stored in a status register. The status register is one of the core components of a computer system, used to store various state information and control information after instruction execution. By reading the V NTC value in the status register, the temperature of the external MOS tube can be monitored in real time. When the V NTC voltage is lower than the preset threshold value, it indicates that the MOS tube temperature is too high, and at this time the MOSFET will be over-temperature closed to protect the circuit from damage. The temperature corresponding voltage threshold is set through the SPI interface to meet the temperature protection requirements in different application scenarios. The electronic fuse EFUSE chip has a built-in VBG (1.2V) voltage divider, and the NTC is part of the VBG voltage divider, which changes with temperature, so V NTC changes synchronously. The calculation process of V NTC is shown in expression (1).

[0062] Where V NTC represents the voltage related to NTC, V BG represents a bandgap reference voltage source that provides a stable reference voltage for the circuit, R T_RER represents the resistance adjustment or compensation related to the NTC resistance temperature effect.

[0063] Based on the above step S104, in response to the power-on of the target vehicle, the initialization process of the circuit protection chip of the target vehicle is carried out, and the initialization result is obtained, which can be used for power distribution of the target domain controller, and the integration of the reasonable domain controller is improved.

[0064] Optionally, the preset power distribution condition is used to indicate that the load current is less than the first current threshold.

[0065] Specifically, the preset power distribution condition indicates that the load current of the sampling resistor is less than the current threshold preset in the EFUSE chip register, indicating that the load current of the target domain controller is in a normal state at this time.

[0066] Optionally, the power distribution method of the vehicle domain controller further includes:

[0067] Step S105, in response to the load current not meeting the preset power distribution condition, the first level of the target pin is switched to the second level based on the load current, so that the external semiconductor transistor is in an off state, wherein the first level is higher than the second level.

[0068] In step S105, the second level is used to represent a low level.

[0069] Specifically, when the load current does not satisfy the preset power distribution condition, that is, the load current is greater than the current threshold preset by the EFUSE chip register, it indicates that the load current of the target domain controller exceeds the limit value, in order to protect the current domain controller, the target domain controller and the on-board wiring harness, at this time, the EFUSE chip will change the HS_GATE pin level according to the load current, and the high level of HS_GATE is changed to low level, so that the external NMOS tube connected with the Gate pole and HS_GATE is turned off. After the NMOS is turned off, the power supply (KL30) of the electronic control unit (ECU) of the target vehicle cannot power the target domain controller, thereby realizing the function of overcurrent protection.

[0070] Based on the above step S105, in response to the load current not satisfying the preset power distribution condition, the first level of the target pin is switched to the second level based on the load current, so that the external semiconductor transistor is in an off state, and the function of overcurrent protection is realized.

[0071] Optionally, in step S102, in response to the load current satisfying the preset power distribution condition, the target power distribution strategy is determined based on the load current, including:

[0072] Step S1021, in response to the load current satisfying the preset power distribution condition, the first level of the target pin is maintained based on the load current, so that the external semiconductor transistor is in a connected state;

[0073] Step S1022, in response to the external semiconductor transistor being in a connected state, the target domain controller is continuously powered.

[0074] Specifically, when the load current satisfies the preset power distribution condition, that is, the load current is less than the current threshold preset by the EFUSE chip register, the HS_GATE pin is controlled to maintain a high level based on the load current, so that the external NMOS connected with the Gate pole and HS_GATE is in an open state, at this time, KL30 will continuously power the target domain controller, thereby realizing the power distribution function.

[0075] Based on the above steps S1021 to S1022, in response to the load current satisfying the preset power distribution condition, the first level of the target pin is maintained based on the load current, so that the external semiconductor transistor is in a connected state, and in response to the external semiconductor transistor being in a connected state, the target domain controller is continuously powered, which can improve the safety of the power distribution strategy of the vehicle domain controller.

[0076] Optionally, the power distribution method of the vehicle domain controller further includes:

[0077] Step S106, in response to the current domain controller being in a sleep state, obtaining the bypass voltage corresponding to the circuit protection chip;

[0078] Step S107, determining the bypass current based on the bypass voltage;

[0079] Step S108, in response to the bypass current meeting the preset wake-up condition, sending a wake-up signal to the current domain controller.

[0080] Specifically, the EFUSE chip has an internal bypass voltage switch. When the current domain controller enters the sleep state, the EFUSE chip monitors the bypass voltage VDS in real time; determine the bypass current based on the bypass voltage; when the target domain controller current demand increases, the bypass current cannot meet the power demand, the EFUSE chip identifies the wake-up demand of other domain controllers, and sends a wake-up signal to wake up the current domain controller to normally power the target domain controller.

[0081] Based on the above steps S106 to S108, in response to the current domain controller being in a sleep state, the bypass voltage corresponding to the circuit protection chip is obtained, the bypass current is determined based on the bypass voltage, and in response to the bypass current meeting the preset wake-up condition, a wake-up signal is sent to the current domain controller, supporting the sleep and wake-up function, and reducing the power consumption of the vehicle domain controller.

[0082] Optionally, in step S106, obtaining the bypass voltage corresponding to the circuit protection chip comprises:

[0083] Step S1061, obtaining the supply voltage and output voltage corresponding to the circuit protection chip;

[0084] In step S1061, the above-mentioned supply voltage is used to represent the voltage corresponding to the VS pin in the EFUSE chip, denoted as VS.

[0085] The above-mentioned output voltage is used to represent the voltage corresponding to the OUT pin in the EFUSE chip, denoted as VOUT.

[0086] Step S1062, determining the bypass voltage based on the difference between the supply voltage and the output voltage.

[0087] In step S1062, VDS=VS-VOUT.

[0088] Based on the above steps S1061 to S1062, the supply voltage and output voltage corresponding to the circuit protection chip are obtained, the bypass voltage is determined based on the difference between the supply voltage and the output voltage, the voltage is monitored in real time, and the safety of the vehicle domain controller is improved.

[0089] Optionally, the preset wake-up condition is used to represent that the bypass current is greater than a second current threshold.

[0090] Specifically, the second current threshold represents the current threshold set by the EFUSE chip for waking up itself when the current domain controller enters the sleep state.

[0091] FIG. 4 is a schematic diagram of a power distribution method of another vehicle domain controller according to an embodiment of the present disclosure. As shown in FIG. 4, when the target vehicle starts, the power-up process begins. First, the master chip configures the first current threshold in the EFUSE chip. Then, the HS_GATE pin level is pulled high, and the external NMOS tube connected to the HS_GATE pin is turned on. At this time, the KL30 power supply can now supply power to the target domain controller. The KL30 power begins to provide power to the target domain controller, ensuring that the target domain controller can work normally. During the power supply process, a sampling resistor is set to monitor the current of the load. The current value through the sampling resistor is obtained and converted into a signal that can be read by the control system. In this way, the control system can know the current situation of the current load in real time.

[0092] Then, the EFUSE chip compares the current value monitored by the sampling resistor with the preset first current threshold. If the sampling current is lower than the first current threshold, the EFUSE chip determines that it is safe and continues to allow the KL30 power supply to supply power to the target domain controller. However, if the sampling current exceeds the first current threshold, it indicates that there may be abnormal conditions such as overload or short circuit, and the EFUSE chip will quickly turn off the NMOS tube to cut off the power supply to prevent damage caused by overcurrent.

[0093] The EFUSE chip has an internal bypass voltage switch. When the current domain controller enters the sleep state, the bypass current, i.e., the current not passing through the sampling resistor, supplies power to the target domain controller. The EFUSE chip monitors the bypass voltage VDS in real time and determines the bypass current based on the bypass voltage. When the current demand of the target domain controller increases and the bypass current cannot meet the power demand, i.e., the bypass current is greater than the second current threshold, the EFUSE chip identifies the wake-up demand of other domain controllers and sends a wake-up signal to wake up the current domain controller to normally supply power to the target domain controller. If the bypass current is less than or equal to the second current threshold, the next round of judgment is started from the power-up process.

[0094] The power supply circuit starts working when the domain controller is powered on, and mainly implements three functions: (1) power supply for the target domain controller; (2) real-time monitoring of the load current of the target domain controller, and once the target domain controller has an overcurrent load current, the circuit completes power-off according to the pre-set power-off time, ensuring that the hardware and wiring harness of the domain controller are not burned out; (3) meeting the low-power demand of the domain controller, supporting the functions of sleep and wake-up. In the case of overall sleep of the current domain controller, the circuit can provide bypass current for the target domain controller to meet the basic current demand of the target domain controller in sleep, and when the current demand of the target domain controller increases and the bypass current cannot meet the power demand, the circuit identifies the wake-up demand of other domain controllers and sends a wake-up signal to wake up the current domain controller to normally power the target domain controller.

[0095] Those skilled in the art can clearly understand from the description of the above embodiments that the method according to the above embodiments can be realized by means of software and necessary general hardware platforms, and of course, it can also be realized by hardware, but in many cases, the former is a better implementation. Based on such understanding, the technical solutions of the disclosure can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a plurality of instructions for making a terminal device (which can be a mobile phone, computer, server, or network device, etc.) execute the method described in various embodiments of the disclosure.

[0096] In the embodiments of the disclosure, a power supply device for a vehicle domain controller is also provided, which is used to implement the above embodiments and preferred embodiments, and will not be described again. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware is also possible and is contemplated.

[0097] FIG. 5 is a structural block diagram of a power supply device for a vehicle domain controller according to an embodiment of the disclosure. As shown in FIG. 5, the device includes:

[0098] The acquisition module 501 is configured to acquire a load current corresponding to a sampling resistance;

[0099] The determination module 502 is configured to determine a target power supply strategy based on the load current in response to the load current meeting a preset power supply condition.

[0100] The processing module 503 is configured to perform power supply processing on the target domain controller by using the target power supply strategy, wherein the target domain controller is used to represent a next-level domain controller corresponding to the current domain controller.

[0101] Optionally, the processing module 503 is further configured to, in response to the target vehicle being powered on, perform initialization processing on the circuit protection chip of the target vehicle to obtain an initialization result, wherein the initialization result is used to set the target pin of the circuit protection chip to a first level, and the target pin is used to connect the external semiconductor transistor.

[0102] Optionally, the preset power distribution condition is used to indicate that the load current is less than a first current threshold.

[0103] Optionally, the processing module 503 is further configured to, in response to the load current not satisfying the preset power distribution condition, switch the first level of the target pin to a second level based on the load current, so that the external semiconductor transistor is in an off state, wherein the first level is higher than the second level.

[0104] Optionally, the determining module 502 is further configured to, in response to the load current satisfying the preset power distribution condition, control the target pin to maintain the first level based on the load current, so that the external semiconductor transistor is in a connected state; and in response to the external semiconductor transistor being in the connected state, continuously supply power to the target domain controller.

[0105] Optionally, the obtaining module 501 is further configured to, in response to the current domain controller being in a sleep state, obtain a bypass voltage corresponding to the circuit protection chip; the determining module 502 is further configured to determine a bypass current based on the bypass voltage; and the processing module 503 is further configured to, in response to the bypass current satisfying a preset wake-up condition, send a wake-up signal to the current domain controller.

[0106] Optionally, the obtaining module 501 is further configured to obtain a supply voltage and an output voltage corresponding to the circuit protection chip; and the determining module 502 is further configured to determine the bypass voltage based on a difference between the supply voltage and the output voltage.

[0107] Optionally, the preset wake-up condition is used to indicate that the bypass current is greater than a second current threshold.

[0108] It should be noted that the above various modules can be implemented by software or hardware, and for the latter, the following implementation manners can be used, but are not limited thereto: all the above modules are located in the same processor; or the above various modules are located in different processors in any combination.

[0109] According to another aspect of the embodiments of the present disclosure, a storage medium stores a computer program, wherein the computer program is configured to execute the power distribution method of the vehicle domain controller when running.

[0110] Optionally, in the present embodiment, the above storage medium can be configured to store a computer program for executing the following steps:

[0111] S1, acquire a load current corresponding to a sampling resistor;

[0112] S2, in response to the load current satisfying a preset power distribution condition, determine a target power distribution strategy based on the load current;

[0113] S3, perform power distribution processing on a target domain controller using the target power distribution strategy, wherein the target domain controller is used to represent a next level domain controller corresponding to the current domain controller.

[0114] Optionally, in the embodiment, the storage medium can include, but is not limited to, a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and various computer program storage media.

[0115] According to another aspect of the embodiment of the present disclosure, a computer program product is also provided, which includes computer instructions executed by a processor to implement the power distribution method of the vehicle domain controller.

[0116] Optionally, in the embodiment, the computer program product can be set as a computer program to perform the following steps:

[0117] S1, acquire a load current corresponding to a sampling resistor;

[0118] S2, in response to the load current satisfying a preset power distribution condition, determine a target power distribution strategy based on the load current;

[0119] S3, perform power distribution processing on a target domain controller using the target power distribution strategy, wherein the target domain controller is used to represent a next level domain controller corresponding to the current domain controller.

[0120] According to another aspect of the embodiment of the present disclosure, an electronic device is also provided, which includes a processor, a memory for storing processor executable instructions, wherein the processor is configured to execute the instructions to implement the power distribution method of the vehicle domain controller.

[0121] Optionally, in the embodiment, the processor can be set to execute the following steps by the computer program:

[0122] S1, acquire a load current corresponding to a sampling resistor;

[0123] S2, in response to the load current satisfying a preset power distribution condition, determine a target power distribution strategy based on the load current;

[0124] S3, performing power distribution processing on the target domain controller according to the target power distribution strategy, wherein the target domain controller is used to represent a next level domain controller corresponding to the current domain controller.

[0125] Optionally, specific examples in the embodiment can refer to the examples described in the above embodiments and optional implementation manners, and the embodiment will not be described here again.

[0126] The sequence numbers of the above embodiments of the present disclosure are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0127] In the above embodiments of the present disclosure, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can refer to the related description of other embodiments.

[0128] In several embodiments provided by the present disclosure, it should be understood that the disclosed technology can be implemented in other ways. Of course, the embodiment described above is only schematic. For example, the division of units can be a logical function division, and there can be another division manner in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, and can be electrical or other forms.

[0129] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiment scheme.

[0130] In addition, each functional unit in each embodiment of the present disclosure can be integrated in one processing unit, or each unit can be a physically independent unit, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware, or in the form of software functional unit.

[0131] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present disclosure, essentially or in other words, the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present disclosure. The aforementioned storage medium includes various media that can store program codes, such as a U disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a mobile hard disk, a magnetic disk or an optical disk, etc.

[0132] The above description is only the preferred embodiments of the present disclosure, and it should be pointed out that, for those skilled in the art, without departing from the principles of the present disclosure, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present disclosure.

Claims

1. A power distribution method of a vehicle domain controller, comprising: obtaining a load current corresponding to a sampling resistor; in response to the load current satisfying a preset power distribution condition, determining a target power distribution strategy based on the load current; performing power distribution processing on a target domain controller by using the target power distribution strategy, wherein the target domain controller is used to represent a next level domain controller corresponding to a current domain controller.

2. The power distribution method of a vehicle domain controller according to claim 1, wherein, The method further comprises: in response to a target vehicle being powered on, performing initialization processing on a circuit protection chip of the target vehicle to obtain an initialization result, wherein the initialization result is used to set a target pin of the circuit protection chip to a first level, and the target pin is used to connect an external semiconductor transistor.

3. The power distribution method of a vehicle domain controller according to claim 1, wherein, The preset power distribution condition is used to represent that the load current is less than a first current threshold.

4. The power distribution method of a vehicle domain controller according to claim 2, wherein, The method further comprises: in response to the load current not satisfying the preset power distribution condition, switching the first level of the target pin to a second level based on the load current, so that the external semiconductor transistor is in an off state, wherein the first level is higher than the second level.

5. The power distribution method of a vehicle domain controller according to claim 2, wherein, In response to the load current satisfying the preset power distribution condition, determining the target power distribution strategy based on the load current comprises: in response to the load current satisfying the preset power distribution condition, controlling the target pin to maintain the first level based on the load current, so that the external semiconductor transistor is in a connected state; in response to the external semiconductor transistor being in the connected state, continuously supplying power to the target domain controller.

6. The power distribution method of a vehicle domain controller according to claim 2, wherein, The method further comprises: in response to the current domain controller being in a sleep state, obtaining a bypass voltage corresponding to the circuit protection chip; determining a bypass current based on the bypass voltage; in response to the bypass current satisfying a preset wake-up condition, sending a wake-up signal to the current domain controller.

7. The power distribution method of a vehicle domain controller according to claim 6, wherein, Obtaining the bypass voltage corresponding to the circuit protection chip comprises: obtaining a supply voltage and an output voltage corresponding to the circuit protection chip; determining the bypass voltage based on a difference between the supply voltage and the output voltage.

8. The power distribution method of a vehicle domain controller according to claim 6, wherein, The preset wake-up condition is used to represent that the bypass current is greater than a second current threshold.

9. A power distribution device of a vehicle domain controller, comprising: an obtaining module, configured to obtain a load current corresponding to a sampling resistor; a determining module, configured to determine a target power distribution strategy based on the load current in response to the load current satisfying a preset power distribution condition; a processing module, configured to perform power distribution processing on a target domain controller by using the target power distribution strategy, wherein the target domain controller is used to represent a next level domain controller corresponding to a current domain controller.

10. A non-transitory storage medium having stored therein a computer program, wherein, The computer program is set to execute the power distribution method of the vehicle domain controller as claimed in any one of claims 1 to 8 when running.

11. A computer program product, comprising computer instructions which, when executed by a processor, implement the power distribution method of the vehicle domain controller as claimed in any one of claims 1 to 8.

12. An electronic device, comprising: a processor; a memory for storing instructions executable by the processor; The processor is configured to execute the instructions to implement the power distribution method of the vehicle domain controller in any one of claims 1 to 8.

Images