A low-power consumption control method of a vehicle controller, an electronic device, and a storage medium

Abstract

The application discloses a low-power consumption control method of a vehicle controller, an electronic device and a storage medium, and the method comprises the following steps: a microprocessor detects a system working state, when there is no control operation of the vehicle within a first threshold time T1, the system will be ready to enter a first low-power consumption mode; firstly, the microprocessor opens a second power supply circuit and closes a first power supply circuit, so that the external input current of a functional module is 0, the output current of the functional module is a static output current of a mu A level, and the power consumption is extremely low; then, the microprocessor executes relevant instructions, and enters a stop mode, and the output current is also only a mu A level; when the microprocessor does not receive any wake-up signal within a second threshold time T2, a timer automatically closes the second power supply circuit, the microprocessor is completely closed, the system enters a second low-power consumption mode, the power consumption is further reduced, and the standby time of the electronic control system in the vehicle off state is prolonged.

Description

Technical Field

[0001] This invention relates to a low-power control method, electronic device, and storage medium for a vehicle controller, belonging to the field of automotive electronic control technology. Background Technology

[0002] With the rapid development of the automotive industry, automobiles have become an important means of transportation in people's daily lives. At the same time, people have higher expectations for the performance indicators of automobiles. To further improve the performance of automobiles and meet user needs, major OEMs and suppliers have begun to develop automotive electronic control systems. The diversification of electronic control system functions naturally comes with a complex structure and a large number of components, which inevitably leads to increased system power consumption. The high power consumption of the electronic control system not only shortens its own standby time when the car is off, but also causes frequent deep discharge of the battery, shortening its lifespan, and even causing malfunctions such as inability to start the engine after the battery is completely depleted. Therefore, how to reduce the power consumption of the control system has become a problem that must be addressed in the development of electronic control systems.

[0003] The current mainstream approach to achieving low power consumption is to stop supplying power to some devices in the system during system sleep mode. Existing methods to achieve this involve adding a controllable switching circuit between the system power module and other devices. This switching circuit can consist of several components or a single power management IC chip to perform the corresponding function. However, this approach inevitably has the following drawbacks:

[0004] 1. Designing a switching circuit composed of several components not only requires investment in corresponding research and development and material costs, but also occupies a significant amount of space on the PCB, increasing the size of the control system. Furthermore, these components themselves consume power during operation, affecting the overall power reduction effect.

[0005] 2. Given the current international market's severe oversupply of chips, adding an IC chip will inevitably increase the cost of the controller significantly. In the event of a supply disruption, it may be necessary to reselect and adapt the chip.

[0006] 3. A single low-power mode makes it difficult to select the threshold time. Too short a time will lead to frequent switching of system states, while too long a time will increase power consumption. Summary of the Invention

[0007] This invention aims to address the shortcomings of existing technologies by proposing a low-power control method, electronic device, and storage medium for vehicle controllers. The goal is to overcome the drawbacks of high cost, complex structure, and limited modes in existing low-power solutions, and to achieve power reduction.

[0008] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0009] The present invention discloses a low-power control method for a vehicle controller, characterized in that it is applied to a control system comprising a voltage regulator and reverse connection protection unit, a first power supply circuit, a second power supply circuit, a microprocessor, and functional modules. The first power supply circuit includes a first power chip; the second power supply circuit includes a second power chip and a timer; the input terminal of the voltage regulator and reverse connection protection unit is connected to the output terminal of the vehicle power supply system; the output terminal of the voltage regulator and reverse connection protection unit is connected to the input terminals of the first power chip and the second power chip, respectively; the first power supply circuit is connected to the microprocessor and the functional modules, wherein the switch control port of the first power chip is connected to the output port of the microprocessor; the second power supply circuit is connected to the microprocessor; wherein the switch control port of the second power chip is connected to the output port of the timer and the output port of the microprocessor, respectively; the control port of the timer is connected to the output port of the vehicle ignition signal; the low-power control method is performed according to the following steps:

[0010] Step 1: After the vehicle starts, the voltage stabilization and reverse connection protection unit receives the voltage output by the vehicle power supply system, processes it, and sends it to the first power circuit and the second power circuit respectively, so that the first power circuit and the second power circuit are turned on and power the microprocessor and the functional module.

[0011] The microprocessor keeps the first power circuit on and shuts down the second power circuit, thereby putting the control system in normal operating mode and consuming current in the mA range.

[0012] Step 2: After the vehicle is turned off, the microprocessor and the timer start timing respectively, and the vehicle off time T and the timing time T' are obtained accordingly;

[0013] Step 3: Determine whether the vehicle ignites during the first threshold time T1. If ignition occurs, the microprocessor resets T to zero, the timer also resets T' to zero, and sends a reset signal to the second power chip, causing the second power chip to turn on. The microprocessor keeps the first power circuit on and turns off the second power circuit, thereby allowing the control system to continue to maintain normal operation mode and end the process. Otherwise, the microprocessor prepares to enter the first low-power mode and executes step 4.

[0014] Step 4: The microprocessor first turns on the second power supply circuit to supply power to the microprocessor, and then turns off the first power supply circuit, so that the microprocessor enters the waiting mode in the first low-power mode; at this time, the input current of the function module is 0, and the output current is a static output current in the μA level. The current consumed by the microprocessor in the waiting mode is also in the μA level.

[0015] Step 5: The microprocessor and the timer continue to count, and determine whether the vehicle is ignited when T1 < T < 1-1 . If so, step 9 is executed; otherwise, the control system enters the pseudo-sleep mode in the first low-power mode and step 6 is executed; where T 1-1 represents the pseudo-sleep mode threshold time, and T 1-1 = T1 + t, where t is a time interval.

[0016] Step 6: The microprocessor and the timer continue to count, and determine whether the vehicle is ignited when T 1-1 < T < T 1-2 . If so, step 9 is executed; otherwise, the control system enters the system sleep mode in the first low-power mode and step 7 is executed; where T 1-2 represents the system sleep mode threshold time, and T 1-2 = T 1-1 + t;

[0017] Step 7: After the microprocessor enters the system sleep mode in the first low-power mode, the timing stops. The timer determines whether the vehicle is ignited when T 1-2 < T’ < T2. If so, step 9 is executed; otherwise, the control system enters the second low-power mode and step 8 is executed; where T2 represents the second threshold time, and T2 = T 1-2 + t;

[0018] Step 8: The timer in the second power supply circuit sends an overflow signal to the second power supply chip, causing the second power supply chip to turn off, so that the microprocessor is powered off and enters the fully stopped state, its input current is 0, and step 10 is executed;

[0019] Step 9: The timer clears T’ according to the ignition signal. At the same time, the microprocessor is awakened by the ignition signal and first turns on the first power supply circuit to supply power to itself and the function module, and then turns off the second power supply circuit; thus, the control system resumes the normal working mode and the process ends;

[0020] Step 10: When the vehicle is ignited when T’ > T2, after the timer clears T’ according to the ignition signal, it turns on the second power supply chip to supply power to the microprocessor, causing the microprocessor to reset after power-on, and step 9 is executed.

[0021] The present invention provides an electronic device, including a memory and a processor, wherein the memory is used to store a program that supports the processor in executing the low-power control method, and the processor is configured to execute the program stored in the memory.

[0022] The present invention discloses a computer-readable storage medium on which a computer program is stored, wherein the computer program is executed by a processor to perform the steps of the low-power control method.

[0023] Compared with existing technologies, the beneficial effects of this invention are reflected in:

[0024] 1. The present invention overcomes the drawbacks of high cost, complex structure, single mode and poor effect of the prior art through the low power control method, reduces production and development costs, achieves the effect of power reduction, and increases the types of low power modes.

[0025] 2. By setting the functions of the microprocessor and introducing a timer that can be controlled by the ignition signal, this invention overcomes the drawback of the single mode in the existing low-power solutions, realizes the step-by-step switching of low-power sub-modes, and also enhances the power reduction effect under long-term standby conditions.

[0026] 3. By introducing a low-power linear regulator that can be controlled by a microprocessor and an ignition signal, this invention overcomes the drawbacks of complex switching control circuits in the prior art, reduces the number of components required by the system, thereby reducing the system size and improving the power consumption reduction effect.

[0027] 4. This invention overcomes the drawbacks of existing low-power solutions that require frequent power-on and power-off operations on the microprocessor by continuously powering the microprocessor with a linear regulator with extremely low power consumption in the first low-power mode. It achieves the preservation of executed tasks and the continuation of tasks after ignition under short shutdown time conditions. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the system structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the method flow of the present invention. Detailed Implementation

[0030] In this embodiment, a low-power control method for a vehicle controller is applied to a control system consisting of a voltage regulator and reverse connection protection unit, a first power supply circuit, a second power supply circuit, a microprocessor, and functional modules. Figure 1As shown, in the specific implementation, the microprocessor adopts the Freescale MC9S12XS series microcontroller; the first power supply circuit includes: a first power supply chip; in the specific implementation, the first power supply chip is an LM2576 power supply chip; the second power supply circuit includes: a second power supply chip and a timer; in the specific implementation, the second power supply chip is an LM2941 linear regulator; the input terminal of the voltage regulator and reverse connection protection unit is connected to the output terminal of the vehicle power supply system; the output terminal of the voltage regulator and reverse connection protection unit is connected to the input terminals of the first power supply chip and the second power supply chip respectively; the first power supply circuit is connected to the microprocessor and the functional module respectively, wherein the switching control port of the first power supply chip is connected to the output port of the microprocessor; specifically In implementation, the microprocessor controls the first power chip switch by outputting high and low level signals; a high level signal turns it off, and a low level signal turns it on. The second power circuit is connected to the microprocessor. The switch control port of the second power chip is connected to both the timer's output port and the microprocessor's output port. Specifically, when the microprocessor outputs a high-level signal or the timer outputs an overflow signal, the second power chip turns off; when the microprocessor outputs a low-level signal or the timer outputs a reset signal, the second power chip turns on. The timer's control port is connected to the vehicle ignition signal output port. Specifically, when the vehicle is turned off, the timer starts counting; when the vehicle is ignited, the timer resets. This low-power control method is performed according to the following steps: Figure 2 As shown:

[0031] Step 1: After the vehicle starts, the voltage regulator and reverse connection protection unit receives the voltage output from the vehicle power supply system, processes it, and sends it to the first power circuit and the second power circuit respectively, so that the first power circuit and the second power circuit are turned on and power the microprocessor and functional modules. In specific implementation, the input pins of the first and second power chips are connected in parallel to the input voltage U' processed by the voltage regulator and reverse connection protection unit, and the output voltages of the two are respectively input to a light-emitting diode LED1 and LED2 to indicate the working status of the two. The light indicates that they are on and the dark indicates that they are off.

[0032] The microprocessor keeps the first power supply circuit on and shuts down the second power supply circuit, thereby putting the control system in normal operating mode and consuming current in the mA range. In practice, the system is in normal operating mode by checking whether the microprocessor's peripheral I / O interface can output high and low levels through the functional module.

[0033] Step 2: After the vehicle is turned off, the microprocessor and timer start timing respectively, and the vehicle off time T and timing time T' are obtained accordingly; In specific implementation, the ignition and off signals are set as non-maskable interrupts of the microprocessor, the ignition signal is connected to the timer trigger terminal, and the off signal is connected to the timer reset terminal.

[0034] Step 3: Determine whether the vehicle is ignited during the process of T reaching the first threshold time T1. If it is ignited, the microprocessor clears T, the timer also clears T', and sends a clearing signal to the second power chip, causing the second power chip to turn on. The microprocessor maintains the on state of the first power circuit and turns off the second power circuit, so that the control system continues to maintain the normal working mode and ends the process; otherwise, the microprocessor is ready to enter the first low-power mode and execute Step 4;

[0035] Step 4: The microprocessor first turns on the second power circuit to supply power to the microprocessor, and then turns off the first power circuit, so that the microprocessor enters the waiting mode in the first low-power mode. Specifically, in this mode, the peripheral interfaces of the microprocessor remain active, and the watchdog starts to work; at this time, the input current of the functional module is 0, and the output current is a static output current of μA level. The current consumed by the microprocessor in the waiting mode is also of μA level;

[0036] Step 5: The microprocessor and the timer continue to count, and determine whether the vehicle is ignited when T1 < T < T 1-1 . If it is, execute Step 9; otherwise, the control system enters the pseudo-sleep mode in the first low-power mode. In this mode, the peripheral interfaces are closed, the clock and the watchdog continue to work, and execute Step 6; where, T 1-1 represents the pseudo-sleep mode threshold time, and T 1-1 = T1 + t, where t is a time interval; specifically, the switching of the system mode is carried out by the way that the microprocessor is reset by the watchdog overflow and enters the pseudo-sleep mode;

[0037] Step 6: The microprocessor and the timer continue to count, and determine whether the vehicle is ignited when T 1-1 < T < T 1-2 . If it is, execute Step 9; otherwise, the control system enters the system sleep mode in the first low-power mode. In this mode, the clock and the watchdog will stop working, and execute Step 7; specifically, the switching of the system mode is carried out by the way that the microprocessor is reset by the watchdog overflow and enters the system sleep mode; where, T 1-2 represents the system sleep mode threshold time, and T 1-2 = T 1-1 + t;

[0038] Step 7: After the microprocessor enters the system sleep mode in the first low-power mode, the timing stops. The timer determines whether the vehicle is ignited when T 1-2 < T' < T2. If it is, execute Step 9; otherwise, the control system enters the second low-power mode and executes Step 8; where, T2 represents the second threshold time, and T2 = T 1-2 + t; specifically, T2 is also the overflow threshold time set by the timer;

[0039] Step 8: The timer in the second power supply circuit sends an overflow signal to the second power supply chip, causing the second power supply chip to turn off, thereby causing the microprocessor to enter a completely stopped state after power failure, with its input current being 0, and then execute step 10.

[0040] Step 9: The timer resets T' to zero according to the ignition signal. At the same time, the microprocessor is awakened by the ignition signal and first turns on the first power circuit to power itself and the functional modules, and then turns off the second power circuit; thereby enabling the control system to return to normal working mode and ending the process.

[0041] Step 10: When the vehicle is ignited when T'>T2, the timer clears T' to zero according to the ignition signal, turns on the second power chip to supply power to the microprocessor, so that the microprocessor is reset after power-on and executes step 9.

[0042] In this embodiment, an electronic device includes a memory and a processor. The memory is used to store a program that supports the processor in executing the low-power control method described above. The processor is configured to execute the program stored in the memory.

[0043] In this embodiment, a computer-readable storage medium stores a computer program, which is executed by a processor to perform the steps of the low-power control method described above.

Claims

1. A low-power control method for a vehicle controller, characterized in that, This method is applied to a control system consisting of a voltage regulator and reverse connection protection unit, a first power supply circuit, a second power supply circuit, a microprocessor, and functional modules. The first power supply circuit includes a first power chip; the second power supply circuit includes a second power chip and a timer. The input terminal of the voltage regulator and reverse connection protection unit is connected to the output terminal of the vehicle power supply system. The output terminal of the voltage regulator and reverse connection protection unit is connected to the input terminals of the first and second power chips, respectively. The first power supply circuit is connected to the microprocessor and the functional modules, wherein the switch control port of the first power chip is connected to the output port of the microprocessor. The second power supply circuit is connected to the microprocessor; wherein the switch control port of the second power chip is connected to the output port of the timer and the output port of the microprocessor, respectively. The control port of the timer is connected to the output port of the vehicle ignition signal. The low-power control method is performed according to the following steps: Step 1: After the vehicle starts, the voltage stabilization and reverse connection protection unit receives the voltage output by the vehicle power supply system, processes it, and sends it to the first power circuit and the second power circuit respectively, so that the first power circuit and the second power circuit are turned on and power the microprocessor and the functional module. The microprocessor keeps the first power circuit on and shuts down the second power circuit, thereby putting the control system in normal operating mode and consuming current in the mA range. Step 2: After the vehicle is turned off, the microprocessor and the timer start timing respectively, and the vehicle off time T and the timing time T' are obtained accordingly; Step 3: Determine whether the vehicle ignites during the first threshold time T1. If ignition occurs, the microprocessor resets T to zero, the timer also resets T' to zero, and sends a reset signal to the second power chip, causing the second power chip to turn on. The microprocessor keeps the first power circuit on and turns off the second power circuit, thereby allowing the control system to continue to maintain normal operation mode and end the process. Otherwise, the microprocessor prepares to enter the first low-power mode and executes step 4. Step 4: The microprocessor first turns on the second power circuit to power the microprocessor, and then turns off the first power circuit, thereby causing the microprocessor to enter the waiting mode in the first low power mode; at this time, the input current of the functional module is 0, the output current is a static output current in the μA range, and the current consumed by the microprocessor in the waiting mode is also in the μA range. Step 5: The microprocessor and timer continue timing, and determine T1. <T<T 1-1 If the vehicle is ignited, proceed to step 9; otherwise, the control system enters the pseudo-sleep mode within the first low-power mode and proceeds to step 6; where T 1-1 T represents the threshold time for the pseudo-sleep mode, and T 1-1 =T1+t, where t is a time interval; Step 6: The microprocessor and timer continue timing, and determine T. 1-1 <T<T 1-2 If the vehicle is ignited, proceed to step 9; otherwise, the control system enters the system sleep mode in the first low-power mode and proceeds to step 7; wherein, T 1-2 This represents the system hibernation mode threshold time, and T 1-2 =T 1-1 +t; Step 7: After the microprocessor enters the system sleep mode in the first low-power mode, the timing stops, and the timer determines whether the vehicle is ignited when T 1-2 <T’<T2. If so, step 9 is executed; otherwise, the control system enters the second low-power mode and step 8 is executed; where T2 represents the second threshold time, and T2 = T 1-2 +t; Step 8: The timer in the second power supply circuit sends an overflow signal to the second power supply chip, causing the second power supply chip to turn off, thereby causing the microprocessor to enter a completely stopped state after power failure, with its input current being 0, and then execute step 10. Step 9: The timer resets T' to zero according to the ignition signal. At the same time, the microprocessor is woken up by the ignition signal and first turns on the first power circuit to power itself and the functional modules, and then turns off the second power circuit; thereby enabling the control system to return to normal working mode and ending the process. Step 10: When the vehicle is ignited when T'>T2, the timer clears T' to zero according to the ignition signal, turns on the second power chip to supply power to the microprocessor, so that the microprocessor is reset after power-on and executes step 9.

2. An electronic device, comprising a memory and a processor, characterized in that, The memory is used to store a program that supports the processor in executing the low-power control method of claim 1, and the processor is configured to execute the program stored in the memory.

3. A computer-readable storage medium storing a computer program, characterized in that, The computer program is executed by the processor to perform the steps of the low-power control method of claim 1.

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