Electric vehicle OBC dormancy awakening management method and system and computer equipment

Abstract

The invention discloses an electric vehicle OBC dormancy wake-up management method which comprises the steps that S1, a power management chip identifies multiple wake-up source signals and detects whether any wake-up source signal is effective or not; s2, the power management chip judges that the wake-up source signal is valid, starts a power management module, and sends a wake-up instruction to the main MCU module; and S3, the power management chip judges that the wake-up source signal is invalid, and stops sending the wake-up instruction to the main MCU module. The invention further discloses an electric vehicle OBC dormancy awakening management system which comprises an OBC module, a power management chip, a power management module and a main MCU module. According to the invention, the independent power management chip is used as the sleep wake-up management chip of the OBC system, and the power management chip manages a plurality of wake-up sources in a centralized manner, so that the OBC system has the advantages of stable performance, low cost, system response timeliness and low power consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of OBC of new energy vehicles, and in particular to a method, system and computer equipment for managing OBC sleep and wake-up of electric vehicles. Background Art

[0002] With the continuous advancement of technology and the rapid development of the electric vehicle market, on-board chargers are also constantly evolving and improving. On-board chargers (OBC) are an indispensable component of electric vehicles, used to convert the AC power provided by the power grid into DC power, and then charge the electric vehicle power battery. The original on-board chargers were mainly used for low-power charging. With the popularity of electric vehicles and the increase in demand for fast charging, modern on-board chargers have achieved high-power fast charging, and have higher efficiency and smaller size.

[0003] However, the current sleep-wake-up working mode of the on-board charger has the following disadvantages: 1. High power consumption in sleep mode: In sleep mode, OBC needs to maintain a certain standby state in order to respond to the wake-up signal at any time, which will cause a certain amount of energy consumption and lead to high energy consumption.

[0004] 2. Response time delay: When the on-board charger is in sleep mode, it takes a certain amount of time to wake up and prepare for charging operations, which may cause a delay in the response time of the charging operation and affect the user experience.

[0005] 3. The wake-up source is relatively single: For the detection function of multiple wake-up sources, OBC needs to add corresponding control logic and circuit design, which increases the complexity and cost of the system. Summary of the invention

[0006] The present invention provides an electric vehicle OBC sleep and wake-up management method, system and computer equipment with stable performance, low cost, and both system response timeliness and low power consumption, which can solve at least one of the above technical problems.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions: An electric vehicle OBC sleep wake-up management method comprises the following steps: S1: The power management chip identifies multiple wake-up source signals and detects whether any wake-up source signal is valid; S2: The power management chip determines that the wake-up source signal is valid, turns on the power management module, and sends a wake-up command to the main MCU module; S3: The power management module supplies low voltage power to the OBC module, and the main MCU module receives the wake-up instruction and executes the OBC module wake-up workflow; S4: The power management chip determines that the wake-up source signal is invalid, and stops sending the wake-up instruction to the main MCU module; S5: The main MCU module detects whether it meets the sleep condition. If so, the main MCU module wake-up hold flag is turned off. If not, the main MCU module wake-up hold flag is kept. S6: The power management chip determines whether the main MCU module wake-up hold flag is valid. If not, the power management module is turned off; if valid, the power management chip waits.

[0008] Furthermore, in S1, the multiple wake-up source signals include a hard-line wake-up signal, an AC charging gun wake-up signal, a DC charging gun wake-up signal, a CAN wake-up signal and a main MCU wake-up hold flag signal.

[0009] Furthermore, the valid conditions and invalid conditions of each wake-up source signal are: The valid condition of the hard-wire wake-up signal is a high level voltage of 9V-16V, and the invalid condition is a low level voltage less than 4V; The AC charging gun wake-up signal is divided into CP signal-charging confirmation PWM signal and CC signal-charging connection confirmation signal: The valid conditions of CP signal-charging confirmation PWM signal are: ①, the change range of CP duty cycle exceeds 4% within the specified time; ②, the change of CP duty cycle from existence to non-existence, or from non-existence to existence; ③, the CP signal voltage changes, and the change amplitude exceeds the corresponding threshold; The invalid condition of CP signal-charging confirmation PWM signal is: CP signal does not change; The valid condition of CC signal-charging connection confirmation signal is: CC signal resistance changes, and the change amplitude exceeds the corresponding threshold, and the invalid condition of CC signal-charging connection confirmation signal is: CC resistance does not change; The DC charging gun wake-up signal is the D1 signal-DC charging gun connection signal. The valid condition is a low level less than 0.825V, and the invalid condition is a high level of 2.475V-3.3V; The valid condition of the CAN wake-up signal is that there is a message on the specific CAN channel and a voltage signal is generated. The invalid condition is that there is no message on the specific CAN channel and no voltage signal is generated. The valid condition of the main MCU wake-up hold flag signal is a high level of 2.475V-3.3V, and the invalid condition is a low level less than 0.825V.

[0010] Furthermore, in S2, the power management chip sends a wake-up instruction to the main MCU module via a hard line.

[0011] Furthermore, in S5, the sleep condition of the main MCU module is: the wake-up instruction flag of the power management chip is invalid, and the main MCU module's own instructions are executed and the power-off condition is met.

[0012] Further, in S5, if the main MCU module meets the sleep condition, the power management chip stops sending the wake-up instruction to the main MCU module, and at the same time shuts down the power management module, and cuts off the power supply to the OBC module and other parts; If the main MCU module does not meet the sleep condition, the power management chip continues to send wake-up instructions to the main MCU module, the main MCU module continues to work and run, and the power management module is turned on at the same time, and the power management module continues to supply power to the OBC module and other parts.

[0013] An electric vehicle OBC sleep and wake-up management system, applicable to the electric vehicle OBC sleep and wake-up management method, comprising an OBC module, a power management chip, a power management module and a main MCU module; The power management chip is connected to the power management module and the main MCU module, and is used to identify and detect multiple wake-up source signals, determine whether to turn on or off the power management module, and determine whether to send a wake-up instruction to the main MCU module; The power management module is connected to the main MCU module and is used to supply power to the main MCU module; The main MCU module is connected to the OBC module and is used to change the sleep or wake-up mode of the OBC module.

[0014] Furthermore, the main MCU module includes a detection and awakening unit, which is connected to the power management chip and is used to determine whether the wake-up instruction is valid.

[0015] Furthermore, the power management chip is preferably a PIC chip, and the identifiable wake-up source signals of the OBC module include at least: a hard-line wake-up signal, an AC charging gun wake-up signal, a DC charging gun wake-up signal, a CAN wake-up signal and a main MCU wake-up hold flag signal.

[0016] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the above-mentioned electric vehicle OBC sleep and wake-up management method.

[0017] The beneficial effects of the present invention are embodied in: 1. The present invention adopts a separate power management chip as the sleep and wake-up management chip of the OBC system. The power management chip centrally manages multiple wake-up sources, which can ensure the stability, efficiency and uniformity of the system operation, and has the advantages of stable performance, low cost, and taking into account the timeliness of system response and low power consumption.

[0018] 2. In the system sleep mode, the power management chip keeps working and continuously detects the wake-up source signal. After detecting the wake-up source signal, it can respond quickly, wake up the OBC and enter the working state, ensuring the timeliness of the wake-up source detection.

[0019] 3. When the power management chip detects that the wake-up source is invalid and that the main MCU module meets the sleep conditions, it will turn off the wake-up hold flag of the main MCU module, shut down the power management module, and cut off the power supply to other parts of the OBC, effectively reducing the sleep power consumption of the OBC system.

[0020] 4. This management method has clear logic, which not only meets the low power consumption of the system, but also reduces the development cost of software and hardware. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0022] Figure 1 It is an overall flow chart of the electric vehicle OBC sleep and wake-up management method according to an embodiment of the present invention.

[0023] Figure 2 This is a main working flow chart of the electric vehicle OBC sleep and wake-up process according to an embodiment of the present invention.

[0024] Figure 3 It is an overall structural block diagram of an electric vehicle OBC sleep and wake-up management system according to an embodiment of the present invention.

[0025] Figure 4 It is a structural block diagram of a computer device according to an embodiment of the present invention.

[0026] The components in the attached figure are marked as: 1. OBC module; 2. Power management chip; 3. Power management module; 4. Main MCU module; 5. Detection wake-up unit. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 2 The embodiment of the present invention provides an electric vehicle OBC sleep and wake-up management method, comprising the following steps: S1: The power management chip 2 identifies multiple wake-up source signals and detects whether any wake-up source signal is valid; S2: The power management chip 2 determines that the wake-up source signal is valid, turns on the power management module 3, and sends a wake-up instruction to the main MCU module 4; S3: The power management module 3 supplies low voltage power to the OBC module 1, and the main MCU module 4 receives the wake-up instruction and executes the OBC module 1 wake-up workflow; S4: the power management chip 2 determines that the wake-up source signal is invalid, and stops sending the wake-up instruction to the main MCU module 4; S5: The main MCU module 4 detects whether it meets the sleep condition. If so, the wake-up hold flag of the main MCU module 4 is turned off. If not, the wake-up hold flag of the main MCU module 4 is kept. S6: The power management chip 2 determines whether the wake-up hold flag of the main MCU module 4 is valid. If not, the power management module 3 is turned off. If valid, the power management chip 2 waits.

[0029] In the present invention, when the system is in sleep mode, the power management chip keeps working and continuously detects the wake-up source signal. After detecting the wake-up source signal, it can quickly respond and process, wake up the OBC and enter the working state, thereby ensuring the timeliness of the wake-up source detection; when the power management chip detects that the wake-up source is invalid and detects that the main MCU module meets the sleep condition, it will turn off the wake-up hold flag of the main MCU module, turn off the power management module, cut off the power supply to other parts of the OBC, and effectively reduce the sleep power consumption of the OBC system. In this way, the management method has clear logic, and while meeting the low power consumption of the system, it also reduces the development cost of software and hardware.

[0030] See also Figure 2 In this embodiment, in S1, the multiple wake-up source signals include a hard-line wake-up signal, an AC charging gun wake-up signal, a DC charging gun wake-up signal, a CAN wake-up signal, and a main MCU wake-up hold flag signal; The valid and invalid conditions of the above wake-up source signals are: Hard-wire wake-up signal, representing the KL30 wake-up signal, its valid condition is a high level voltage of 9V-16V, and its invalid condition is a low level voltage less than 4V; The AC charging gun wake-up signal is divided into CP signal-charging confirmation PWM signal and CC signal-charging connection confirmation signal: CP signal - valid conditions for charging confirmation PWM signal: ①, the CP duty cycle changes within the specified time by more than 4%; ②, the CP duty cycle changes from presence to absence, that is, from 0%, 100% to 0% or 100%, or from absence to presence, that is, from 0% or 100% to 0%, 100%; ③, the CP signal voltage changes, and the change amplitude exceeds the corresponding threshold; CP signal - invalid conditions for charging confirmation PWM signal: if the CP signal does not change, it is considered that there is no new wake-up signal; The valid condition of CC signal-charging connection confirmation signal is: the CC signal resistance changes, and the change amplitude exceeds the corresponding threshold, which is generally set to 3.3KΩ. The invalid condition of CC signal-charging connection confirmation signal is: the CC resistance does not change, which means there is no new wake-up signal. The DC charging gun wake-up signal is the D1 signal-DC charging gun connection signal. The valid condition is a low level less than 0.825V, and the invalid condition is a high level of 2.475V-3.3V; The valid condition of the CAN wake-up signal is that there is a message on the specific CAN channel and a voltage signal is generated. The invalid condition is that there is no message on the specific CAN channel and no voltage signal is generated. The main MCU wake-up hold flag signal represents the main MCU wake-up signal, and its valid condition is a high level of 2.475V-3.3V, and its invalid condition is a low level less than 0.825V.

[0031] In the present invention, the power management chip centrally manages multiple wake-up sources, which can ensure the stability, efficiency and uniformity of the system operation, and has the advantages of stable performance, low cost, and taking into account the timeliness of system response and low power consumption.

[0032] See also Figure 2 In this embodiment, in S2, the power management chip 2 sends a wake-up instruction to the main MCU module 4 through a hard line, which can ensure that the signal transmission is more efficient and reliable.

[0033] See also Figure 1-Figure 2 In this embodiment, in S5, the sleep condition of the main MCU module 4 is: the wake-up instruction flag of the power management chip 2 is invalid, and the main MCU module 4 has completed its own instruction execution and meets the power-off condition.

[0034] See also Figure 1-Figure 2 In this embodiment, in S5, if the main MCU module 4 meets the sleep condition, the power management chip 2 stops sending the wake-up instruction to the main MCU module 4, and at the same time shuts down the power management module 3, and cuts off the power supply of the OBC module 1 and other parts; If the main MCU module 4 does not meet the sleep condition, the power management chip 2 continues to send wake-up instructions to the main MCU module 4, the main MCU module 4 continues to work and run, and at the same time turns on the power management module 3, and the power management module 3 continues to supply power to the OBC module 1 and other parts.

[0035] In this way, when the OBC system is in sleep mode, only the power management chip 2 works, and other power supplies of the OBC system are cut off, which can ensure that the system has the lowest sleep power consumption. At the same time, due to the continuous operation of the power management chip 2, when a new wake-up source signal enters, the OBC system can be awakened at the fastest speed and enter normal operation.

[0036] See also Figure 3 , the embodiment of the present invention also provides an electric vehicle OBC sleep and wake-up management system, which is applicable to the electric vehicle OBC sleep and wake-up management method, including an OBC module 1, a power management chip 2, a power management module 3 and a main MCU module 4; The power management chip 2 is connected to the power management module 3 and the main MCU module 4, and is used to identify and detect multiple wake-up source signals, determine whether to turn on or off the power management module 3, and determine whether to send a wake-up instruction to the main MCU module 4; The power management module 3 is connected to the main MCU module 4 and is used to supply power to the main MCU module 4; The main MCU module 4 is connected to the OBC module 1 and is used to change the sleep or wake-up mode of the OBC module 1 .

[0037] In the present invention, a separate power management chip is used as the sleep and wake-up management chip of the OBC system. The power management chip detects the wake-up source of the OBC controller and judges the validity of the wake-up source. When the wake-up source is valid, the power management module is turned on to realize the low-voltage power supply of the OBC controller and send a wake-up instruction to the main MCU module. When the wake-up source is invalid, the wake-up instruction is stopped from being sent to the main MCU module and the power management module is turned off.

[0038] See also Figure 3In this embodiment, the main MCU module 4 includes a detection and wake-up unit 5, which is connected to the power management chip 2 and is used to determine whether the wake-up instruction is valid. When the detection and wake-up unit 5 determines that the wake-up instruction is valid, the main MCU module 4 is woken up and the wake-up hold flag is maintained. The main MCU module 4 continues to work. If the wake-up instruction is determined to be invalid, the wake-up hold flag is turned off and the main MCU module 4 enters sleep mode.

[0039] See also Figure 2-Figure 3 In this embodiment, the power management chip 2 is preferably a PIC chip, and the identifiable wake-up source signals of the OBC module 1 include at least: a hard-line wake-up signal, an AC charging gun wake-up signal, a DC charging gun wake-up signal, a CAN wake-up signal and a main MCU wake-up hold flag signal. The valid conditions and invalid conditions of the above wake-up source signals have been introduced in the previous embodiments, so they will not be repeated here.

[0040] An embodiment of the present invention further provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the processor executes the steps of the above method.

[0041] See also Figure 4 An embodiment of the present invention further provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the above method.

[0042] The embodiment of the present invention further provides a computer program product including instructions, which, when executed on a computer, enables the computer to execute any one of the electric vehicle OBC sleep and wake-up management methods in the above embodiments.

[0043] It is understandable that the system, device and storage medium provided in the embodiments of the present invention correspond to the method provided in the embodiments of the present invention, and the explanation, examples and beneficial effects of the relevant contents can refer to the corresponding parts in the above methods.

[0044] It should be noted that those skilled in the art can understand that all or part of the steps implemented in the embodiments of the present invention can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from one website, computer, server or data center to another website, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0045] In summary, the present invention adopts a separate power management chip as the sleep wake-up management chip of the OBC system. The power management chip centrally manages multiple wake-up sources, which can ensure the stability, efficiency and uniformity of the system operation, and has the advantages of stable performance, low cost, and taking into account the timeliness of system response and low power consumption. When the system is in sleep mode, the power management chip keeps working and continuously detects the wake-up source signal. After detecting the wake-up source signal, it can quickly respond and process, wake up the OBC and enter the working state, which can ensure the timeliness of the wake-up source detection; when the power management chip detects that the wake-up source is invalid, and detects that the main MCU module meets the sleep condition, it will turn off the wake-up hold flag of the main MCU module, turn off the power management module, cut off the power supply to other parts of the OBC, and effectively reduce the sleep power consumption of the OBC system. In this way, the logic of this management system and method is clear, while meeting the low power consumption of the system, it also reduces the development cost of software and hardware.

[0046] It should be understood that the examples and implementation modes described herein are for illustrative purposes only and are not intended to limit the present invention. Those skilled in the art may make various modifications or changes based on the examples and implementation modes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for managing the sleep and wake-up of an electric vehicle OBC, characterized in that: The following steps are involved: S1: The power management chip (2) identifies multiple wake-up source signals and detects whether any wake-up source signal is valid; S2: the power management chip (2) determines that the wake-up source signal is valid, turns on the power management module (3), and sends a wake-up instruction to the main MCU module (4); S3: the power management module (3) supplies low voltage power to the OBC module (1), and the main MCU module (4) receives the wake-up instruction and executes the wake-up workflow of the OBC module (1); S4: the power management chip (2) determines that the wake-up source signal is invalid, and stops sending the wake-up instruction to the main MCU module (4); S5: the main MCU module (4) detects whether it meets the sleep condition, and if so, turns off the wake-up hold flag of the main MCU module (4); if not, keeps the wake-up hold flag of the main MCU module (4); S6: The power management chip (2) determines whether the wake-up hold flag of the main MCU module (4) is valid, and if not, shuts down the power management module (3); if valid, waits.

2. The electric vehicle OBC sleep and wake-up management method according to claim 1, characterized in that: In S1, the multiple wake-up source signals include a hard-line wake-up signal, an AC charging gun wake-up signal, a DC charging gun wake-up signal, a CAN wake-up signal, and a main MCU wake-up hold flag signal.

3. The electric vehicle OBC sleep and wake-up management method according to claim 2, characterized in that: The valid and invalid conditions of each wake-up source signal are: The valid condition of the hard-wire wake-up signal is a high level voltage of 9V-16V, and the invalid condition is a low level voltage less than 4V; The AC charging gun wake-up signal is divided into CP signal-charging confirmation PWM signal and CC signal-charging connection confirmation signal: The valid conditions of CP signal-charging confirmation PWM signal are: ①, the change range of CP duty cycle exceeds 4% within the specified time; ②, the change of CP duty cycle from existence to non-existence, or from non-existence to existence; ③, the CP signal voltage changes, and the change amplitude exceeds the corresponding threshold; The invalid condition of CP signal-charging confirmation PWM signal is: CP signal does not change; The valid condition of CC signal-charging connection confirmation signal is: CC signal resistance changes, and the change amplitude exceeds the corresponding threshold, and the invalid condition of CC signal-charging connection confirmation signal is: CC resistance does not change; The DC charging gun wake-up signal is the D1 signal-DC charging gun connection signal. The valid condition is a low level less than 0.825V, and the invalid condition is a high level of 2.475V-3.3V; The valid condition of the CAN wake-up signal is that there is a message on the specific CAN channel and a voltage signal is generated. The invalid condition is that there is no message on the specific CAN channel and no voltage signal is generated. The valid condition of the main MCU wake-up hold flag signal is a high level of 2.475V-3.3V, and the invalid condition is a low level less than 0.825V.

4. The electric vehicle OBC sleep and wake-up management method according to claim 1, characterized in that: In S2, the power management chip (2) sends a wake-up instruction to the main MCU module (4) via a hard line.

5. The electric vehicle OBC sleep and wake-up management method according to claim 1, characterized in that: In S5, the sleep condition of the main MCU module (4) is: the wake-up instruction flag of the power management chip (2) is invalid, and the main MCU module (4) has completed the execution of its own instructions and meets the power-off condition.

6. The electric vehicle OBC sleep and wake-up management method according to claim 1, characterized in that: In S5, if the main MCU module (4) meets the sleep condition, the power management chip (2) stops sending the wake-up instruction to the main MCU module (4), and simultaneously shuts down the power management module (3), cutting off the power supply to the OBC module (1) and other parts; If the main MCU module (4) does not meet the sleep condition, the power management chip (2) keeps sending a wake-up instruction to the main MCU module (4), the main MCU module (4) continues to operate, and at the same time the power management module (3) is turned on, and the power management module (3) continues to supply power to the OBC module (1) and other parts.

7. An electric vehicle OBC sleep and wake-up management system, applicable to the electric vehicle OBC sleep and wake-up management method as claimed in any one of claims 1 to 6, characterized in that: It includes an OBC module (1), a power management chip (2), a power management module (3) and a main MCU module (4); The power management chip (2) is connected to the power management module (3) and the main MCU module (4), and is used to identify and detect multiple wake-up source signals, determine whether to turn on or off the power management module (3), and determine whether to send a wake-up instruction to the main MCU module (4); The power management module (3) is connected to the main MCU module (4) and is used to supply power to the main MCU module (4); The main MCU module (4) is connected to the OBC module (1) and is used to change the sleep or wake-up mode of the OBC module (1).

8. The electric vehicle OBC sleep and wake-up management system as claimed in claim 7, characterized in that: The main MCU module (4) comprises a detection and awakening unit (5), which is connected to the power management chip (2) and is used to determine whether a wake-up instruction is valid.

9. The electric vehicle OBC sleep and wake-up management system as claimed in claim 7, characterized in that: The power management chip (2) is preferably a PIC chip, and the identifiable wake-up source signal of the OBC module (1) includes at least: a hard-line wake-up signal, an AC charging gun wake-up signal, a DC charging gun wake-up signal, a CAN wake-up signal, and a main MCU wake-up hold flag signal.

10. A computer device comprising a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the method according to any one of claims 1 to 6.

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