Automobile power consumption mode control system and method

Abstract

The invention relates to an automobile power consumption mode control system and method, and the method comprises the steps: determining a power consumption mode of an automobile through a cooperation signal of the automobile, and achieving the conversion between different power consumption modes; the power consumption mode of the automobile comprises a static low-power consumption mode, a waiting low-power consumption mode and a normal working mode; the cooperative signal comprises a KL15 signal, an INH signal, and a second control signal and a third control signal sent by the MCU module; wherein the KL15 signal and the NH signal jointly control the first power supply module and the fourth power supply module; and a second control signal and a third control signal sent by the MCU module respectively control the second power supply module and the third power supply module. According to the automobile power consumption mode control method, power consumption management is optimized by removing an MOS tube, the energy efficiency ratio is increased, the system flexibility is enhanced, the cost is reduced, and meanwhile the user experience is improved.

Description

Technical Field

[0001] The present invention relates to the field of power consumption, and in particular to a control system and method for a power consumption mode of an automobile. Background Art

[0002] The current low power consumption implementation method is mainly through the vehicle hard-wired wake-up signal KL15 signal (key switch signal KeyLock 15) and the specific frame wake-up signal through the switch MOS to open and shut down the overall power supply. There are problems such as the inability to accurately control and the high cost of MOS and its peripheral circuits.

[0003] Vehicle hard-wired wake-up signal (KL15): KL15 is a common automotive electrical term that refers to the power supply line from the vehicle's ignition switch (or similar control unit) to the main power supply of the vehicle's electrical system. When the ignition switch is in a certain position (such as "ON" or "ACC"), the KL15 line is energized to provide power to the vehicle's electrical system. In low-power implementations, the KL15 signal is often used as the primary means of waking up the vehicle's electrical system. However, this method is relatively rough because it cannot finely control the various sub-modules in the system and can only switch the entire power supply on and off uniformly.

[0004] "Specific frame wake-up signal" refers to a specific data packet or signal sent through the vehicle's internal network (such as CAN bus, LIN bus, etc.) to wake up a specific electronic control unit (ECU) or subsystem in the vehicle. This method is more flexible than the KL15 signal because it allows the system to wake up different components according to specific needs. However, the implementation of this method requires the support of the vehicle's internal network, and requires good communication protocols and logical judgments between each ECU to ensure that the corresponding components can be accurately woken up when needed.

[0005] MOS (Metal-Oxide-Semiconductor) switch is a commonly used electronic switching element with advantages such as low on-resistance and high switching speed. In vehicle electrical systems, MOS switches are often used to control the on and off of large currents, thereby turning the overall power on and off. First, due to the need to accurately control the power state of each subsystem, a large number of MOS switches and complex peripheral circuits may be required, which increases the complexity and cost of the system. Secondly, although the power consumption of MOS switches is very low, they still consume a certain amount of electricity when used in large quantities, especially when they are in standby mode for a long time.

[0006] In summary, there are some problems with existing automobile power consumption control circuits and methods. The main problems are (1) Inability to achieve precise control: The KL15 signal and the overall power switch cannot achieve precise control of each sub-module in the vehicle electrical system. This may result in unnecessary components consuming power when the vehicle is in low power mode. (2) High cost: Using a large number of MOS switches and complex peripheral circuits to achieve low power mode will increase the cost of the system. This includes material cost, design cost, and manufacturing cost.

[0007] Therefore, it is necessary to develop a new automobile power consumption mode control system and method. Summary of the invention

[0008] The object of the present invention is to provide a vehicle power consumption mode control system and method, which can reduce the power consumption of the entire vehicle.

[0009] In the first aspect, a car power consumption mode control system described in the present invention includes: an MCU module, a CAN communication module, and first to fourth power modules; the first power module is connected to the ignition signal, i.e., the KL15 signal, and the fourth power module; the CAN communication module receives a specific frame to pull up the INH signal and sends it to the first power module; the MCU module is connected to the second and third power modules respectively through the second and third control signals. In the second aspect, a car power consumption mode control system described in the present invention includes: determining the power consumption mode of the car through the coordinated signal of the car, and realizing the conversion between different power consumption modes; the power consumption modes of the car include static low power consumption mode, waiting low power consumption mode, and normal working mode; The collaborative signal includes a KL15 signal, an INH signal and a second and third control signal sent by the MCU module; wherein the KL15 signal and the NH signal jointly control the first and fourth power modules; and the second and third control signals sent by the MCU module respectively control the second and third power modules.

[0010] There are three main power consumption modes: static low power consumption mode, waiting low power consumption mode and normal working mode.

[0011] (1) Static low power mode: When the car is not ignited and has not received a wake-up command, the KL15 signal, INH signal, and the second and third control signals are all low level, that is, the car is in static low power mode, and only some functions of the CAN module of the entire system are working.

[0012] (2) Waiting for low power mode (ignition without receiving motor drive signal): When the driver has started the ignition in the car but has not controlled the movement of the car, the KL15 signal and the INH signal are high, while the second and third control signals are low, that is, the car is in waiting for low power mode. At this time, only the CAN module and the MCU are working in the entire system. Specifically, it means that the car has been started, but the driver has not driven, that is, the VCU has not sent a speed or torque request signal to the electric drive MCU module or the requested speed or torque is 0.

[0013] (3) Normal working mode: When the driver controls the movement of the car, the KL15 signal, INH signal, second and third control signals are all high level, that is, the car is in normal working mode. At this time, all power supplies are working normally.

[0014] The automobile power consumption mode control method can realize the conversion between the power consumption modes through the cooperative signal of the automobile, including realizing the mutual conversion between the static low power consumption mode and the normal working mode through the cooperative signal of the automobile; realizing the mutual conversion between the waiting low power consumption mode and the normal working mode through the cooperative signal of the automobile; and realizing the conversion from the waiting low power consumption mode to the static power consumption mode through the cooperative signal of the automobile.

[0015] The specific conversion mode is as follows; (1) Switch from normal working mode to static low power mode, such as Figure 4 When the car is in normal working mode, after receiving the shutdown command, the KL15 signal is pulled down to a low level, and the MCU module turns off the second and third power supplies by pulling down the second and third control signals; if the power-off time is greater than or equal to the first time threshold, the MCU module controls the CAN module to pull down the INH signal and turn off the first and fourth power supplies; that is, the car is converted from the normal working mode to the static low power consumption mode.

[0016] (2) Convert from static low power mode to normal working mode, such as Figure 5 The conversion from the static low power consumption mode to the normal working mode is realized through the coordinated signal of the car, including hard line wake-up mode and remote line wake-up mode, wherein: The hard-line wake-up mode includes: when the car is in the static low-power mode, it receives the ignition command, the KL15 signal becomes high, the first and fourth power modules are awakened, and the MCU module is also awakened at this time. The MCU module will wake up the CAN module during the initialization process. When the CAN module is awakened, the INH signal will be pulled high, that is, the second and third control signals are sent to wake up the second and third power supplies, and then enter the normal working mode; The remote wake-up mode includes: the external key sends a specific frame to the CAN bus through the vehicle system, wakes up the CAN module and the INH signal is pulled high. At this time, the first and fourth power supplies are awakened, and then the MCU module is awakened. The MCU module wakes up the second and third power supplies during the initialization process, so that the entire system is awakened.

[0017] (3) Switch from normal working mode to waiting low power mode, such as Figure 6 When the car is in normal working mode, if the motor driving signal is not received for a period greater than or equal to the second time threshold, the MCU module sets the second control signal and the third control signal to a low level, turns off the second and third power supplies, and maintains the first and fourth power supplies, that is, the car is converted from the normal working mode to the waiting low power consumption mode.

[0018] (4) Switch from waiting low power mode to normal working mode, such as Figure 7 When the car is in the waiting low power consumption mode, it receives the motor drive signal, the MCU module pulls the second and third control signals to high level, turns on the second and third power supplies, and the MCU module performs a system self-check, that is, the car switches from the waiting low power consumption mode to the normal working mode.

[0019] (5) Switch from waiting low power mode to static low power mode, such as Figure 8 When the car is in the waiting low power consumption mode, it receives the ignition off command, the KL15 signal is pulled down to a low level, if the power-off time is greater than or equal to the third time threshold, the MCU module sets the INH signal to a low level, the first and fourth power supplies are turned off, that is, the car is converted from the waiting low power consumption mode to the static low power consumption mode.

[0020] The beneficial effects of the present invention include at least: Optimizing vehicle power consumption: The present invention further optimizes the power consumption management of the vehicle by introducing a waiting power consumption mode in the vehicle power consumption mode control method. This waiting power consumption mode is between static power consumption and normal operation, and can flexibly adjust the power consumption state according to the actual needs of the vehicle, thereby more effectively reducing the overall energy consumption. By optimizing the vehicle power consumption mode control method, the present invention can reduce the power consumption of the vehicle in standby or sleep mode, thereby extending the battery life. This means longer driving range and fewer charging times for users, improving the user's driving experience and satisfaction.

[0021] Improve energy efficiency: Through the hierarchical control switch mode, the present invention can more finely control the power supply of each functional module inside the car. This hierarchical control not only helps to reduce power consumption, but also improves energy efficiency, so that the car can maintain a high energy utilization efficiency under various working conditions.

[0022] Reduce costs: Although the power consumption of MOS switches is relatively low, the present invention further reduces the power consumption of MOS switches by optimizing control logic and circuit design. This helps to extend the service life of automotive electronic control systems and reduce system failures caused by excessive power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1-2 This is the car power consumption mode control system diagram Figure 3 This is a flow chart of the transition between three different power consumption modes. Figure 4 This is a flow chart of the car switching from normal working mode to static low power mode Figure 5 This is a flow chart of the car switching from static low power mode to normal working mode Figure 6 This is a flow chart of the car switching from normal working mode to waiting low power mode Figure 7 This is a flow chart of the car switching from waiting low power mode to normal working mode Figure 8 This is a flow chart of the car switching from waiting low power mode to static low power mode DETAILED DESCRIPTION

[0024] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0025] The first aspect of the present application proposes a method and system for controlling a vehicle power consumption mode, such as Figure 1 , 2 As shown, it includes an MCU module, a CAN communication module, and the first to fourth power supply modules; The first power module is connected to the ignition signal, i.e., the KL15 signal, and the fourth power module; The CAN communication module receives a specific frame, pulls up the INH signal, and sends it to the first power supply module; The MCU module is connected to the second and third power supply modules respectively through the second and third control signals.

[0026] The power supply is divided into three levels according to the voltage, and the three levels of power supply control the on and off of each power supply respectively. The A-level power supply is KL30 ( Figure 1The battery in the circuit is a Class A input power supply, which is mainly used to control the disconnection of the external power supply. It is generally powered by a battery. The vehicle input voltage is generally 13.5V), and it has been in normal working condition and supplies power to the CAN chip separately; the Class B power supply is the first and fourth power modules, which are the necessary power for the MCU to work (generally 5.3V, 1.25V, and some MCUs may not need 1.25V); the Class C power supply is the second and third power modules. The second power module is the driving power supply (generally 15V / -8V), which is used for IGBT driving and resolver functions; the third power module (generally high-precision 5V) is other low-voltage power supplies, which are used to power comparators, current sampling, voltage sampling, debugging CAN, ADC reference voltage, storage chips and other peripheral function chips.

[0027] The second aspect of the present application proposes a method for controlling the power consumption mode of an automobile, which is applicable to the automobile power consumption control system described in the first aspect. The power consumption modes of an automobile include a static low power consumption mode, a waiting low power consumption mode, and a normal working mode; the power consumption mode of the automobile is determined by the coordinated signal of the automobile, and the conversion between different power consumption modes is realized; the coordinated signal includes a KL15 signal, an INH signal, and the second and third control signals sent by the MCU module; wherein the KL15 signal and the NH signal jointly control the first and fourth power modules; the second and third control signals sent by the MCU module respectively control the second and third power modules.

[0028] There are three main power consumption modes of a car: static low power consumption mode, waiting low power consumption mode, and normal working mode.

[0029] (1) Static low power mode: When the car is not ignited and has not received a wake-up command, the KL15 signal, INH signal, and the second and third control signals are all low level, that is, the car is in static low power mode, and only some functions of the CAN module of the entire system are working.

[0030] (2) Waiting for low power mode (ignition without receiving motor drive signal): When the driver has started the ignition in the car but has not controlled the movement of the car, the KL15 signal and the INH signal are high, while the second and third control signals are low, that is, the car is in waiting for low power mode. At this time, only the CAN module and the MCU are working in the entire system. Specifically, it means that the car has been started, but the driver has not driven, that is, the VCU has not sent a speed or torque request signal to the electric drive MCU module or the requested speed or torque is 0.

[0031] (3) Normal working mode: When the driver controls the movement of the car, the KL15 signal, INH signal, second and third control signals are all high level, that is, the car is in normal working mode. At this time, all power supplies are working normally.

[0032] The control mode of the power module is to control the power on and off of the power supply by giving the power module enable pin (EN) a high or low level signal. The first and fourth power supplies are controlled by KL15 and INH signals. The specific implementation logic is that the KL15 & INH signal connects the EN pin of the first and fourth power supplies. When it is high, the power chip of the first and fourth power supplies is enabled, and there is power output. When it is low, the first and fourth power supplies do not output.

[0033] The automobile power consumption mode control method can realize the conversion between the power consumption modes through the cooperative signal of the automobile, including realizing the mutual conversion between the static low power consumption mode and the normal working mode through the cooperative signal of the automobile; realizing the mutual conversion between the waiting low power consumption mode and the normal working mode through the cooperative signal of the automobile; and realizing the conversion from the waiting low power consumption mode to the static power consumption mode through the cooperative signal of the automobile.

[0034] It should be noted that the static low-power mode enters the normal working mode immediately after the KL15&INH signal is enabled; since the normal working mode needs a certain delay to switch to the waiting low-power mode after the judgment condition is met (to avoid misjudgment during normal driving), it takes a delay to enter the waiting mode from the static low-power mode even if the conditions are met (there is no request for VCU speed and torque or the request is 0), and it is impossible to directly switch from the waiting low-power mode to the static low-power mode.

[0035] The specific conversion mode is as follows; (1) Switch from normal working mode to static low power mode, such as Figure 4 When the car is in normal working mode, after receiving the shutdown command, the KL15 signal is pulled down to a low level, and the MCU module turns off the second and third power supplies by pulling down the second and third control signals; if the power-off time is greater than or equal to the first time threshold, the MCU module controls the CAN module to pull down the INH signal and turn off the first and fourth power supplies; that is, the car is converted from the normal working mode to the static low power consumption mode.

[0036] (2) Convert from static low power mode to normal working mode, such as Figure 5 The conversion from the static low power consumption mode to the normal working mode is realized through the coordinated signal of the car, including hard line wake-up mode and remote line wake-up mode, wherein: The hard-line wake-up mode includes: when the car is in the static low-power mode, it receives the ignition command, the KL15 signal becomes high, the first and fourth power modules are awakened, and the MCU module is also awakened at this time. The MCU module will wake up the CAN module during the initialization process. When the CAN module is awakened, the INH signal will be pulled high, that is, the second and third control signals are sent to wake up the second and third power supplies, and then enter the normal working mode; The remote wake-up mode includes: the external key sends a specific frame to the CAN bus through the vehicle system, wakes up the CAN module and the INH signal is pulled high. At this time, the first and fourth power supplies are awakened, and then the MCU module is awakened. The MCU module wakes up the second and third power supplies during the initialization process, so that the entire system is awakened.

[0037] (3) Switch from normal working mode to waiting low power mode, such as Figure 6 When the car is in normal working mode, if the motor driving signal is not received for a period greater than or equal to the second time threshold, the MCU module sets the second control signal and the third control signal to a low level, turns off the second and third power supplies, and maintains the first and fourth power supplies, that is, the car is converted from the normal working mode to the waiting low power consumption mode.

[0038] (4) Switch from waiting low power mode to normal working mode, such as Figure 7 When the car is in the waiting low power consumption mode, it receives the motor drive signal, the MCU module pulls the second and third control signals to high level, turns on the second and third power supplies, and the MCU module performs a system self-check, that is, the car switches from the waiting low power consumption mode to the normal working mode.

[0039] (5) Switch from waiting low power mode to static low power mode, such as Figure 8 When the car is in the waiting low power consumption mode, it receives the ignition off command, the KL15 signal is pulled down to a low level, if the power-off time is greater than or equal to the third time threshold, the MCU module sets the INH signal to a low level, the first and fourth power supplies are turned off, that is, the car is converted from the waiting low power consumption mode to the static low power consumption mode.

[0040] The power consumption control architecture of the present application reduces P-MOS tubes and related circuits, and directly controls the switch through the power EN pin, which can more accurately control each power supply and reduce the cost of the power supply architecture.

[0041] The above-mentioned embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above-mentioned embodiments. Any other changes, modifications, substitutions, combinations and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement modes and shall be included in the protection scope of the present invention.

Claims

1. An automobile power consumption mode control system, characterized in that: It includes an MCU module, a CAN communication module, and first to fourth power supply modules; The first power module is connected to the ignition signal, i.e., the KL15 signal, and the fourth power module; The CAN communication module receives a specific frame, pulls up the INH signal, and sends it to the first power supply module; The MCU module is connected to the second and third power supply modules respectively through the second and third control signals.

2. A method for controlling a vehicle power consumption mode, characterized in that: The method uses the automobile power consumption mode control system as claimed in claim 1, comprising: Determine the power consumption mode of the vehicle through the coordinated signal of the vehicle, and realize the conversion between different power consumption modes; The power consumption modes of the automobile include a static low power consumption mode, a waiting low power consumption mode, and a normal working mode; The collaborative signal includes a KL15 signal, an INH signal and a second and third control signal sent by the MCU module; wherein the KL15 signal and the NH signal jointly control the first and fourth power modules; and the second and third control signals sent by the MCU module respectively control the second and third power modules.

3. The method for controlling the power consumption mode of an automobile according to claim 2, characterized in that: When the car is not ignited and does not receive a wake-up command, the KL15 signal, the INH signal, the second and third control signals are all low level, that is, the car is in a static low power consumption mode.

4. The method for controlling the automobile power consumption mode according to claim 2, characterized in that: When the driver has started the ignition in the car but has not controlled the movement of the car, the KL15 signal and the INH signal are at a high level, while the second and third control signals are at a low level, that is, the car is in a waiting low power consumption mode.

5. The method for controlling the automobile power consumption mode according to claim 2, characterized in that: When the driver controls the movement of the car, the KL15 signal, the INH signal, the second and third control signals are all high level, that is, the car is in the normal working mode.

6. The method for controlling the automobile power consumption mode according to any one of claims 3 to 5, characterized in that: When the car is in normal working mode, the KL15 signal is pulled down to a low level after receiving the shutdown command, and the MCU module turns off the second and third power supplies by pulling down the second and third control signals; if the power-off time is greater than or equal to the first time threshold, the MCU module controls the CAN module to pull down the INH signal and turn off the first and fourth power supplies; that is, the car switches from normal working mode to static low power consumption mode.

7. The method for controlling the automobile power consumption mode according to any one of claims 3 to 5, characterized in that: The conversion from the static low power consumption mode to the normal working mode is realized through the cooperative signal of the car, including hard line wake-up mode and remote line wake-up mode, wherein, The hard-line wake-up mode includes: when the car is in the static low-power mode, it receives the ignition command, the KL15 signal becomes high, the first and fourth power modules are awakened, and the MCU module is also awakened at this time. The MCU module will wake up the CAN module during the initialization process. When the CAN module is awakened, the INH signal will be pulled high, that is, the second and third control signals are sent to wake up the second and third power supplies, and then enter the normal working mode; The remote wake-up mode includes: the external key sends a specific frame to the CAN bus through the vehicle system, wakes up the CAN module and the INH signal is pulled high. At this time, the first and fourth power supplies are awakened, and then the MCU module is awakened. The MCU module wakes up the second and third power supplies during the initialization process, so that the entire system is awakened.

8. The method for controlling the automobile power consumption mode according to any one of claims 3 to 5, characterized in that: When the car is in normal working mode, if the motor drive signal is not received for a period greater than or equal to the second time threshold, the MCU module sets the second control signal and the third control signal to a low level, turns off the second and third power supplies, and maintains the first and fourth power supplies, that is, the car switches from normal working mode to waiting low power consumption mode.

9. The automobile power consumption mode control method according to any one of claims 3 to 5, characterized in that: When the car is in the waiting low power consumption mode, it receives the motor drive signal, the MCU module pulls the second and third control signals to a high level, turns on the second and third power supplies, and the MCU module performs a system self-check, that is, the car switches from the waiting low power consumption mode to the normal working mode.

10. The automobile power consumption mode control method according to any one of claims 3 to 5, characterized in that: When the car is in the waiting low power consumption mode, it receives the ignition off command, and the KL15 signal is pulled down to a low level. If the power-off time is greater than or equal to the third time threshold, the MCU module sets the INH signal to a low level, and the first and fourth power supplies are turned off. That is, the car switches from the waiting low power consumption mode to the static low power consumption mode.

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