Wake-up recognition device and system
Through the joint identification of wake-up signals between the power chip and the microcontroller unit, the identification problem when multiple wake-up signals are triggered simultaneously is solved, ensuring the accurate wake-up of the PDCU and the power saving of the system.
Patent Information
- Application Number
- CN202421661225.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-07-12
AI Technical Summary
In the prior art, as the functional integration of the automotive controller increases, the interface of the wake-up signal is limited, resulting in the inability to accurately identify the multiple wake-up signal when it is triggered at the same time, resulting in the inability to wake up the PDCU and causing customer complaints.
The first interface of the power supply chip is used to identify the rising edge of the wake-up signal and wake up the power supply chip to supply power to the microcontroller unit. At the same time, the wake-up signal is collected through the level sampling interface of the microcontroller to identify the wake-up requester, ensuring that it can be accurately identified when multiple wake-up sources send signals at the same time, and reducing unnecessary main relay activation through the level sampling interface and reducing power consumption.
It realizes accurate identification when multiple wake-up signals are triggered at the same time, avoids the situation where some functions cannot be awakened, reduces system power consumption, and improves system reliability and response speed.
Smart Images
Figure CN223308558U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile electronics, and in particular to a wake-up recognition device and system. Background Art
[0002] As vehicles transition from traditional fuel-powered vehicles to new energy vehicles, and as vehicles become increasingly intelligent and complex, automotive controllers such as the engine control unit (ECU) are integrating more functions and evolving towards the power domain control unit (PDCU). Previously, the engine controller typically woke up when the controller detected the ignition signal line (KL15) transitioning from low to high. The power chip then powered on the microcontroller unit (MCU). After the MCU completed initialization, it entered normal operation.
[0003] Some vehicles hope to wake up the controller after receiving additional inputs such as door opening signals. In this case, the ECU will also receive an ACC signal, and an additional Wake-in interface will be reserved on the power chip to identify the rising edge and wake up the ECU. As the PDCU integrates more and more functions, more and more signals are expected to wake up the PDCU. In addition to the two signals described above, there will also be multiple CAN network wake-up signals, multiple LIN communication wake-up signals, and other hard-wired signals such as the gas door wake-up signal. Because the power chip can only recognize a limited number of interfaces for wake-up signals, several signals will be combined before being connected to the Wake-in interface. In this way, when some wake-up signals are triggered at the same time for some reason, the rising edge will not be successfully recognized and the PDCU will not be able to wake up, causing customer complaints. Utility Model Content
[0004] In view of the above defects in the prior art, the present invention provides a wake-up recognition device and system to solve the technical problem that a rising edge wake-up signal cannot be successfully recognized.
[0005] To achieve the above-mentioned purpose and other related purposes, the present invention provides a wake-up identification device, including a power supply chip and a micro control unit; the power supply chip has a first interface, the first interface is used to be electrically connected to at least two first wake-up sources, the first interface is used to receive a wake-up signal emitted by the first wake-up source, and wake up the power supply chip when the rising edge of the wake-up signal is identified to power the micro control unit; the micro control unit has at least one level sampling interface, the level sampling interface is electrically connected to one of the first wake-up sources, the micro control unit collects the wake-up signal of the corresponding first wake-up source through the level sampling interface, and locates the wake-up requester according to the sampling result to control the wake-up requester to perform the corresponding function, the wake-up requester is the first wake-up source that emits the wake-up signal.
[0006] In an embodiment of the present invention, a first protection circuit for current limiting is further included, and the first interface is electrically connected to at least two of the first wake-up sources through the first protection circuit.
[0007] In one embodiment of the present invention, a first unidirectional isolation circuit is further included, wherein one end of the first protection circuit is electrically connected to the first interface, and the other end of the first protection circuit is electrically connected to at least two of the first wake-up sources through the first unidirectional isolation circuit.
[0008] In an embodiment of the present invention, at least one first filtering circuit is further included, and each of the level sampling interfaces is electrically connected to a first wake-up source via a first filtering circuit.
[0009] In an embodiment of the present invention, the micro control unit has at least two level sampling interfaces, and each of the first wake-up sources is electrically connected to one of the level sampling interfaces.
[0010] In one embodiment of the present invention, the power chip further has a second interface, which is used to be electrically connected to multiple second wake-up sources. The second interface is used to receive a wake-up signal emitted by the second wake-up source, and to wake up the power chip when the wake-up signal is recognized as a high level, so as to power the micro control unit and activate the main relay.
[0011] In one embodiment of the present invention, a second protection circuit for current limiting and a second unidirectional isolation circuit are further included, one end of the second protection circuit is electrically connected to the second interface, and the other end is electrically connected to multiple second wake-up sources through the second unidirectional isolation circuit.
[0012] In one embodiment of the present invention, the level sampling interface is electrically connected to a second wake-up source, and the microcontroller unit further collects the wake-up signal of the corresponding second wake-up source through the level sampling interface, and locates the wake-up requester based on the sampling result to control the wake-up requester to perform a corresponding function. The wake-up requester is the second wake-up source that sends the wake-up signal.
[0013] In an embodiment of the present invention, a plurality of second filter circuits are further included, and each of the second wake-up sources is electrically connected to one of the level sampling interfaces via one of the second filter circuits.
[0014] To achieve the above objectives and other related objectives, the present invention further provides a wakeup identification system, comprising a wakeup source, a power chip, a microcontroller unit, and a main relay; the wakeup source comprises a first wakeup source and a second wakeup source; the power chip has a first interface and a second interface, the first interface being electrically connected to at least two of the first wakeup sources, the first interface being configured to receive a wakeup signal emitted by the first wakeup source, and waking up the power chip upon recognizing a rising edge of the wakeup signal to power the microcontroller unit; the second interface being electrically connected to multiple second wakeup sources, the second interface being configured to receive a wakeup signal emitted by the second wakeup source, and waking up the power chip upon recognizing a high level of the wakeup signal to power the microcontroller unit and activate the main relay; the microcontroller unit having at least one level sampling interface being electrically connected to one of the first wakeup source or the second wakeup source, the microcontroller unit collecting the wakeup signal from the corresponding first wakeup source or the second wakeup source through the level sampling interface, and locating the wakeup requester based on the sampling result to control the wakeup requester to perform a corresponding function, the wakeup requester being the first wakeup source or the second wakeup source that emits the wakeup signal.
[0015] The beneficial effects of the present invention are as follows: the present invention proposes a wake-up identification device and system, which identifies the first wake-up source through the first interface of the power chip to wake up the power chip to realize power supply to the micro control unit, and also samples and identifies the wake-up signal through the level sampling interface of the micro control unit. The power chip receives the signal of the first wake-up source to wake up the micro control unit, and the micro control unit receives the signal of the first wake-up source to identify the wake-up requester. The two work together to identify the wake-up requester at the same time as waking up, ensuring that when multiple first wake-up sources send signals at the same time, all wake-up sources can still be accurately identified, avoiding the situation where some functions cannot be awakened; at the same time, the power chip will not force the main relay to be activated after waking up, which will save more power than using only high-level wake-up. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0017] Figure 1 A first schematic diagram of a wake-up recognition system provided by an embodiment of the present invention, which includes a wake-up recognition device;
[0018] Figure 2 A second schematic diagram of a wake-up recognition system provided by an embodiment of the present invention;
[0019] Figure 3 A schematic diagram of a power-on wake-up process according to an embodiment of the present invention.
[0020] Explanation of the accompanying symbols: 100, power chip; 101, first interface; 102, second interface; 200, micro control unit; 201, level sampling interface; 301, first protection circuit; 302, first unidirectional isolation circuit; 303, first filtering circuit; 304, second protection circuit; 305, second unidirectional isolation circuit; 306, second filtering circuit; 401, first wake-up source; 402, second wake-up source; 500, main relay. DETAILED DESCRIPTION
[0021] The following describes the implementation of the present invention through specific specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. It should be noted that the following embodiments and the features in the embodiments can be combined with each other unless there is a conflict. In addition to the specific methods, equipment, and materials used in the embodiments, based on the understanding of the prior art by those skilled in the art and the description of the present invention, any methods, equipment, and materials of the prior art that are similar or equivalent to the methods, equipment, and materials described in the embodiments of the present invention can also be used to implement the present invention.
[0022] It should be understood that the terms used in the examples of the present invention are intended to describe specific embodiments rather than to limit the scope of protection of the present invention. Unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as those commonly understood by those skilled in the art.
[0023] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read. They are not used to limit the conditions for the implementation of this utility model, and therefore have no substantive technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in this utility model without affecting the efficacy and purpose that can be achieved by this utility model. In addition, the drawings only show the components related to the utility model and are not drawn according to the number, shape, and size of the components in actual implementation. In actual implementation, the type, quantity, and proportion of each component can be changed at will, and the component layout type may also be more complicated.
[0024] See Figure 1 and Figure 2 , Figure 1 and Figure 2 The portion enclosed by the dotted line in the figure is a wake-up recognition device provided by an embodiment of the present invention, including a power chip 100 and a microcontroller unit 200. The power chip 100 is a core component in the automotive electronic control system, playing a vital role in vehicle electronic control systems, power conversion applications, information processing and control, etc. In this embodiment, the power chip 100 may be, for example, an STL9788 or a chip of the same architecture. The microcontroller unit 200 (also known as an MCU) is a highly integrated semiconductor chip widely used in modern automobiles to control and monitor various electronic systems. It integrates the core functions of the processor, memory, and input / output interfaces, and can manage various functions of the vehicle by executing program code. In this embodiment, the microcontroller unit 200 may be, for example, an IFXTC3XX series or an STSPC56X / SPC58X series or a chip of the same architecture. The specific chip selection of the power chip 100 and the microcontroller unit 200 varies depending on the manufacturer's needs, and the specific models given above are only examples.
[0025] The power chip 100 has a first interface 101 (corresponding to the wake-in interface). The first interface 101 is used to electrically connect to at least two first wake-up sources 401. The first interface 101 is used to receive a wake-up signal from the first wake-up source 401 and wake up the power chip 100 upon recognizing the rising edge of the wake-up signal to power the microcontroller unit 200. After receiving the wake-up signal from the first wake-up source 401, the first interface 101 wakes up the power chip 100. In this case, power supply from the main relay 500 is not mandatory and can be controlled by the microcontroller unit 200. The first wake-up source 401 can, for example, be a CAN3 wake-up, a gas door wake-up, or the like. The first interface 101 is electrically connected to at least two first wake-up sources 401 because only when two or more first wake-up sources 401 are connected can a rising edge not be successfully recognized.
[0026] The MCU 200 has at least one level sampling interface 201, which is electrically connected to a first wakeup source 401. The MCU 200 uses the level sampling interface 201 to collect the wakeup signal from the corresponding first wakeup source 401. Based on the sampling results, the MCU 200 locates the wakeup requester, which is the first wakeup source 401 that issues the wakeup signal, and controls the wakeup requester to execute the corresponding function. In this embodiment, the MCU 200 collects the wakeup signal from the first wakeup source 401, allowing the MCU 200 to identify the specific wakeup requester and subsequently trigger the corresponding function.
[0027] The device identifies the first wake-up source 401 through the first interface 101 of the power chip 100 to wake up the power chip 100 to power the micro control unit 200. At the same time, the wake-up signal is sampled and identified through the level sampling interface 201 of the micro control unit 200. In this way, even if some wake-up signals are triggered at the same time, they can still be accurately identified. Moreover, in this solution, the main relay 500 will not be forcibly activated, thereby saving more power.
[0028] It should be noted that there are at least two first wake-up sources 401 and at least one level sampling interface 201, which covers Figure 1 and Figure 2 Two options. Figure 1 In the embodiment, each first wake-up source 401 is connected to the level sampling interface 201, and the micro control unit 200 samples each first wake-up source 401; Figure 2 In the embodiment, the sampling of one of the first wake-up sources 401 can be omitted, which can reduce one level sampling saving circuit. If all the level sampling interfaces 201 do not collect relevant signals but the system wakes up from the shutdown state due to the wake-up signal, it can be determined that the wake-up requester at this time is the first wake-up source 401 that has not been sampled, and then the system can execute the relevant functions.
[0029] It should be noted that Figure 1 and Figure 2 The red dotted line in the figure indicates that the first wake-up source 401 can also be connected to the second interface 102 of the power chip 100. However, in this case, the main relay 500 will be activated each time the power chip 100 is woken up, which will increase system power consumption. Figure 2 The black dotted line in the figure indicates that there was a connection here originally but it is not connected now.
[0030] See Figure 1 In a specific embodiment of the present invention, a first protection circuit 301 for current limiting is further included, and the first interface 101 is electrically connected to at least two first wake-up sources 401 through the first protection circuit 301 . Figure 1 The first protection circuit 301 is illustrated by two resistors. Its primary function is current limiting. It also provides impedance matching and improves signal stability. First protection circuit 301 provides comprehensive protection and optimization measures for the circuit. Its specific circuit configuration and details can be selected and designed as needed.
[0031] In a specific embodiment of the present invention, a first unidirectional isolation circuit 302 is further included. One end of the first protection circuit 301 is electrically connected to the first interface 101, and the other end is electrically connected to at least two first wake-up sources 401 through the first unidirectional isolation circuit 302. The primary function of the first unidirectional isolation circuit 302 is to electrically isolate the first wake-up sources 401 from the power chip 100, thereby improving the system's anti-interference capability and safety, protecting the power chip 100 from external inrush currents and transient surge currents, and preventing current or sudden changes from affecting other parts of the circuit.
[0032] In a specific embodiment of the present invention, at least one first filtering circuit 303 is further included, and each level sampling interface 201 is electrically connected to a first wake-up source 401 via a first filtering circuit 303 . Figure 1 In the figure, the first filter circuit 303 is illustrated using an RC resistor-capacitor circuit. This circuit primarily filters high-frequency noise from the wake-up signal emitted by the first wake-up source 401, protecting the microcontroller unit 200 from potential high-frequency interference. This circuit also performs multiple functions, such as current limiting, coupling, and impedance matching, ensuring the overall performance and reliability of the circuit. When designing the first filter circuit 303, appropriate component parameters and connection methods should be selected to meet the circuit's functional and performance requirements.
[0033] It can be understood that the signal collected by the level sampling interface 201 can be a digital signal or an analog signal. When it is a digital signal, a high level corresponds to the wake-up requester; when it is an analog signal, it is judged to be high when the signal voltage is higher than a certain threshold, and it is judged to be low when the signal voltage is lower than a certain threshold.
[0034] In a specific embodiment of the present invention, the micro control unit 200 has at least two level sampling interfaces 201, and each first wake-up source 401 is electrically connected to one level sampling interface 201. Figure 1 In this way, the micro control unit 200 can quickly identify the wake-up requester without making other logical judgments, and the operation is more reliable.
[0035] See Figure 1 In one embodiment of the present invention, the power chip 100 further includes a second interface 102 (referred to as the key-in interface in the figure) for electrical connection to multiple second wakeup sources 402. The second interface 102 receives wakeup signals from the second wakeup sources 402 and, upon recognizing a high-level wakeup signal, wakes up the power chip 100, powering the MCU 200 and activating the main relay 500. The second wakeup source 402 corresponds to a high-level wakeup. When the power chip 100 is awakened by the second wakeup source 402, it not only powers the MCU 200 but also activates the main relay 500. Examples of the second wakeup source 402 include K15 wakeup, ACC wakeup, CAN1 wakeup, CAN2 wakeup, and so on.
[0036] Compared with high-level wake-up, the advantage of rising edge wake-up is that it is more flexible, and it can save more power for a long time because the main relay 500 does not need to be attracted. Its disadvantage is that when the level of the wake-up signal is abnormally high and occupies the first interface 101, it is equivalent to the signal on the first interface 101 being shielded. At this time, it can only be awakened again through the signal on the second interface 102. In some special scenarios, the user will find that the system cannot be awakened, and the key is needed to turn the power on and off to solve the problem. Therefore, for some devices that need to force the main relay 500 to be attracted as the second wake-up source 402, it needs to be connected to the second interface 102 of the power chip 100. For some devices that do not need to force the main relay 500 to be attracted, it can be used as the first wake-up source 401 and can be connected to the first interface 101 of the power chip 100. In this way, the system power consumption is reduced while ensuring the normal wake-up of the system.
[0037] In a specific embodiment of the present invention, a second protection circuit 304 for current limiting and a second unidirectional isolation circuit 305 are also included. One end of the second protection circuit 304 is electrically connected to the second interface 102, and the other end is electrically connected to the plurality of second wake-up sources 402 via the second unidirectional isolation circuit 305. The second protection circuit 304 has the same structure and function as the first protection circuit 301, and the second unidirectional isolation circuit 305 has the same structure and function as the first unidirectional isolation circuit 302. The configuration can be described in the above embodiment and will not be repeated here.
[0038] In a specific embodiment of the present invention, the level sampling interface 201 is electrically connected to a second wake-up source 402. The microcontroller unit 200 also collects the wake-up signal of the corresponding second wake-up source 402 through the level sampling interface 201, and locates the wake-up requester based on the sampling result to control the wake-up requester to perform the corresponding function. The wake-up requester is the second wake-up source 402 that sends the wake-up signal. The microcontroller unit 200 can not sample the wake-up source, but use other logic to determine the wake-up requester, but this method responds slowly and is prone to errors. Therefore, in this embodiment, the microcontroller unit 200 samples not only the first wake-up source 401, but also the second wake-up source 402. In this way, regardless of whether the first wake-up source 401 or the second wake-up source 402 wakes up the power chip 100, so that the microcontroller unit 200 is powered, the microcontroller unit 200 can quickly and accurately collect the wake-up signal to determine the wake-up requester and respond quickly and accurately.
[0039] In a specific embodiment of the present invention, multiple second filter circuits 306 are further included. Each second wake-up source 402 is electrically connected to a level sampling interface 201 via a second filter circuit 306. The second filter circuit 306 has the same circuit structure and functions as the first filter circuit 303. The design of the second filter circuit 306 can be referenced by referring to the above description of the first filter circuit 303, and will not be repeated here.
[0040] See Figure 1 and Figure 2 , Figure 1 and Figure 2A wake-up system is disclosed, including a wake-up source, a power chip 100, a micro control unit 200, and a main relay 500. The wake-up source includes a first wake-up source 401 and a second wake-up source 402; the power chip 100 has a first interface 101 and a second interface 102, the first interface 101 is used to electrically connect with at least two first wake-up sources 401, the first interface 101 is used to receive a wake-up signal sent by the first wake-up source 401, and wake up the power chip 100 when recognizing the rising edge of the wake-up signal to power the micro control unit 200, the second interface 102 is used to electrically connect with multiple second wake-up sources 402, the second interface 102 is used to receive a wake-up signal sent by the second wake-up source 402, and wake up the power chip 100 when recognizing the rising edge of the wake-up signal Normally, the power supply chip 100 is awakened to power the microcontroller unit 200 and activate the main relay 500. The microcontroller unit 200 has at least one level sampling interface 201, which is electrically connected to a first wakeup source 401 or a second wakeup source 402. The microcontroller unit 200 collects the wakeup signal from the corresponding first wakeup source 401 or second wakeup source 402 through the level sampling interface 201, and locates the wakeup requester based on the sampling result to control the wakeup requester to perform the corresponding function. The wakeup requester is the first wakeup source 401 or the second wakeup source 402 that issues the wakeup signal. The wakeup recognition system is a system that includes the above-mentioned wakeup recognition device. Its advantages are as described in the various embodiments of the wakeup recognition device. The various embodiments of the above-mentioned wakeup recognition device can also be applied to the wakeup recognition system.
[0041] Taking the fuel door wakeup as an example, some vehicles are equipped with a locking motor to lock the fuel door to prevent others from opening it at will. The fuel door wakeup only drives the locking motor to unlock the fuel door, so it is generally used as the first wakeup source 401. When the vehicle stops to refuel, the vehicle is already powered off. When the fuel door wakeup is detected, the power chip 100 is first awakened and then powers the microcontroller unit 200. The microcontroller unit 200 detects that it is the fuel door wakeup and drives the locking motor to unlock, allowing refueling.
[0042] See Figure 3 , Figure 3 This is a schematic diagram of the power-on wakeup process. As can be seen from the figure, the system supports connections to various wakeup inputs and power chip 100. Specifically, when evaluating a specific function, the system determines whether the wakeup function requires energizing main relay 500, thereby balancing system power consumption. Compared to existing technologies, this system ensures that all wakeup requests can wake the system and accurately locates the wakeup requester. Furthermore, certain wakeup requesters are configured on first interface 101 to reduce system power consumption.
[0043] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.
Claims
1. A wake-up recognition device, characterized in that: Including power chip and micro control unit; The power chip has a first interface, the first interface is used to be electrically connected to at least two first wake-up sources, the first interface is used to receive a wake-up signal sent by the first wake-up source, and wake up the power chip when a rising edge of the wake-up signal is recognized to power the micro control unit; The microcontroller unit has at least one level sampling interface, which is electrically connected to one of the first wake-up sources. The microcontroller unit collects a wake-up signal from the corresponding first wake-up source through the level sampling interface, and locates the wake-up requester based on the sampling result to control the wake-up requester to perform a corresponding function. The wake-up requester is the first wake-up source that sends the wake-up signal.
2. The wake-up recognition device according to claim 1, characterized in that It also includes a first protection circuit for current limiting, and the first interface is electrically connected to at least two of the first wake-up sources through the first protection circuit.
3. The wake-up recognition device according to claim 2, characterized in that: It also includes a first unidirectional isolation circuit, one end of the first protection circuit is electrically connected to the first interface, and the other end is electrically connected to at least two of the first wake-up sources through the first unidirectional isolation circuit.
4. The wake-up recognition device according to claim 1, characterized in that It also includes at least one first filtering circuit, and each of the level sampling interfaces is electrically connected to a first wake-up source via a first filtering circuit.
5. The wake-up recognition device according to claim 1, characterized in that: The micro control unit has at least two level sampling interfaces, and each of the first wake-up sources is electrically connected to one level sampling interface.
6. The wake-up recognition device according to claim 1, characterized in that: The power chip also has a second interface, which is used to be electrically connected to multiple second wake-up sources. The second interface is used to receive a wake-up signal sent by the second wake-up source, and wake up the power chip when the wake-up signal is recognized as a high level, so as to power the micro control unit and activate the main relay.
7. The wake-up recognition device according to claim 6, characterized in that: It also includes a second protection circuit for current limiting and a second unidirectional isolation circuit, one end of the second protection circuit is electrically connected to the second interface, and the other end is electrically connected to the plurality of second wake-up sources through the second unidirectional isolation circuit.
8. The wake-up recognition device according to claim 6, characterized in that: The level sampling interface is electrically connected to a second wake-up source. The microcontroller unit also collects a wake-up signal from the corresponding second wake-up source through the level sampling interface, and locates the wake-up requester based on the sampling result to control the wake-up requester to perform a corresponding function. The wake-up requester is the second wake-up source that sends the wake-up signal.
9. The wake-up recognition device according to claim 8, characterized in that: It also includes multiple second filtering circuits, and each of the second wake-up sources is electrically connected to one of the level sampling interfaces through one of the second filtering circuits.
10. A wake-up system, characterized in that: Including wake-up source, power chip, micro control unit and main relay; The wakeup source includes a first wakeup source and a second wakeup source; The power chip has a first interface and a second interface, the first interface is used to be electrically connected to at least two of the first wake-up sources, the first interface is used to receive a wake-up signal sent by the first wake-up source, and wake up the power chip when recognizing a rising edge of the wake-up signal to power the micro control unit, and the second interface is used to be electrically connected to multiple second wake-up sources, the second interface is used to receive a wake-up signal sent by the second wake-up source, and wake up the power chip when recognizing that the wake-up signal is at a high level, to power the micro control unit and activate the main relay; The microcontroller unit has at least one level sampling interface, which is electrically connected to one of the first wake-up source or the second wake-up source. The microcontroller unit collects the wake-up signal of the corresponding first wake-up source or the second wake-up source through the level sampling interface, and locates the wake-up requester based on the sampling result to control the wake-up requester to perform a corresponding function. The wake-up requester is the first wake-up source or the second wake-up source that sends the wake-up signal.