Control circuit, wake-up sleep method, battery management system and vehicle

Abstract

The invention relates to a control circuit, a wake-up sleep method, a battery management system and a vehicle. The control circuit comprises a CAN transceiver and a signal circuit which are connected with each other. The signal circuit is connected with an external controlled device and a controller. The CAN transceiver is used for outputting a first control signal to the signal circuit according to a CAN bus message; and the signal circuit is used for outputting a wake-up signal to the controlled equipment according to the first control signal and outputting a sleep signal to the controlled equipment according to a second control signal output by the controller. The application range of the circuit can be expanded, and the cost is reduced.

Description

Control circuit, sleep wake-up method, battery management system and vehicle Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a control circuit, a sleep awakening method, a battery management system, and a vehicle. Background Art

[0002] With the development of new energy technologies, electric vehicles are becoming more and more popular among users. In electric vehicles, the battery management system can be awakened by a signal under certain conditions.

[0003] Currently, the wake-up signal is mainly output by a chip with a CAN (Controller Area Network) wake-up function. However, the cost of a chip with a CAN wake-up function is relatively high.

[0004] Summary of the Invention

[0005] Based on the above problems, the present application provides a control circuit, a wake-up and sleep method, a battery management system and a vehicle, which can realize the wake-up function and the sleep function. It not only has a wide range of applications, but also can help reduce the production cost of electric vehicles.

[0006] In a first aspect, the present application provides a control circuit. The control circuit includes a CAN transceiver and a signal circuit connected to each other, the signal circuit being connected to an external controlled device and a controller, respectively; the CAN transceiver is configured to output a first control signal to the signal circuit based on a CAN bus message; and the signal circuit is configured to output a wake-up signal to the controlled device based on the first control signal and a sleep signal to the controlled device based on a second control signal output by the controller.

[0007] In the technical solution of the embodiment of this application, the control circuit is built based on a CAN transceiver. CAN transceivers are relatively low-cost and suitable for mass production, which can help reduce the production cost of electric vehicles. Moreover, the control circuit has not only a wake-up function but also a sleep function, making it more comprehensive and applicable to a wider range of applications.

[0008] In some embodiments, the signal circuit includes a switch circuit and a trigger circuit; the switch circuit is connected to the CAN transceiver and the controller, respectively, and the trigger circuit is connected to the switch circuit and the controlled device, respectively; the switch circuit is configured to output a trigger signal to the trigger circuit according to a first control signal and to output a set signal to the trigger circuit according to a second control signal; the trigger circuit is configured to output a wake-up signal to the controlled device according to the trigger signal and to output a sleep signal to the controlled device according to the set signal. In the technical solution of the embodiment of the present application, based on the CAN transceiver, the wake-up function and the sleep function are implemented through the switch circuit and the trigger circuit. The circuit has simple control logic and low construction cost, which can help reduce the production cost of electric vehicles.

[0009] In some embodiments, the switch circuit includes a first switch circuit and a second switch circuit; the first switch circuit is connected to the CAN transceiver and the trigger circuit respectively; the second switch circuit is connected to the trigger circuit and the controller respectively; the first switch circuit is configured to output a trigger signal to the trigger circuit under the control of a first control signal; and the second switch circuit is configured to output a set signal to the trigger circuit under the control of a second control signal. In the technical solution of the embodiment of the present application, the trigger circuit is triggered and set respectively by the first switch circuit and the second switch circuit, thereby realizing the wake-up function and the sleep function. The circuit not only has a wide range of applications but also has a low construction cost, which can help reduce the production cost of electric vehicles.

[0010] In some embodiments, the first switch circuit is connected to a data output port of a CAN transceiver; the first switch circuit is configured to receive a first control signal output by the data output port of the CAN transceiver and output a trigger signal under control of the first control signal. In the technical solution of the embodiments of the present application, the wake-up function is implemented via the data output port of the CAN transceiver. The CAN transceiver is relatively low-cost and suitable for mass production, which can help reduce the production cost of electric vehicles.

[0011] In some embodiments, the first switching circuit includes a first switching transistor; a control electrode of the first switching transistor is connected to a data output port of the CAN transceiver, a first electrode of the first switching transistor is connected to a first power supply terminal, and a second electrode of the first switching transistor is connected to a trigger circuit. In the technical solution of the embodiments of the present application, the first switching circuit is constructed based on the switching transistor, thereby enabling a wake-up function through the data output port of the CAN transceiver. The cost of the CAN transceiver is low, and the first switching circuit is easy to construct, making the wake-up function easier to implement.

[0012] In some embodiments, a first switch circuit is connected to a high-level port and a low-level port of a CAN transceiver, respectively; the first switch circuit is configured to receive a first control signal output by the high-level port and the low-level port, and output a trigger signal under the control of the first control signal. In the technical solution of the embodiments of the present application, the wake-up function is implemented through the high-level port and the low-level port of the CAN transceiver. The CAN transceiver is relatively low-cost and suitable for mass production, which can help reduce the production cost of electric vehicles.

[0013] In some embodiments, the first switch circuit includes a comparator and a second switch tube; the two input ports of the comparator are respectively connected to the high-level port and the low-level port of the CAN transceiver, and the output port of the comparator is connected to the control electrode of the second switch tube; the first electrode of the second switch tube is connected to the second power supply terminal, and the second electrode of the second switch tube is connected to the trigger circuit. In the technical solution of the embodiment of the present application, the first switch circuit is constructed based on the switch tube and the comparator, so that the wake-up function can be implemented through the high-level port and the low-level port of the CAN transceiver. The cost of the CAN transceiver is low, and the first switch circuit is easy to construct, making the wake-up function easier to implement.

[0014] In some embodiments, the second switching circuit includes a third switching transistor; the control electrode of the third switching transistor is connected to the controller, the first electrode of the third switching transistor is connected to the third power supply terminal and the trigger circuit, respectively, and the second electrode of the third switching transistor is grounded. In the technical solution of the embodiments of the present application, the second switching circuit based on the switching transistor can cooperate with the trigger circuit to implement a sleep function, thereby expanding the scope of application of the circuit.

[0015] In some embodiments, the trigger circuit includes a trigger, wherein an input port of the trigger is connected to the fourth power supply terminal, a trigger port of the trigger is connected to the first switch circuit, a set port of the trigger is connected to the second switch circuit, and an output port of the trigger is connected to the controlled device. In the technical solution of the embodiment of the present application, the trigger circuit is constructed based on the trigger to implement the wake-up function and the sleep function, thereby expanding the scope of application of the circuit.

[0016] In some embodiments, the control circuit further includes a standby circuit, which is connected to the CAN transceiver and the controller respectively; the standby circuit is configured to receive a third control signal output by the controller and, under the control of the third control signal, output a standby signal to the CAN transceiver. In the technical solution of the embodiments of the present application, the standby circuit can be used to put the CAN transceiver into standby mode, thereby reducing circuit power consumption.

[0017] In some embodiments, the standby circuit includes a fourth switch; a control electrode of the fourth switch is connected to the controller, a first electrode of the fourth switch is connected to a fifth power supply terminal and a standby port of the CAN transceiver, respectively, and a second electrode of the fourth switch is grounded. In the technical solution of the embodiments of the present application, the standby circuit based on the switch can cause the CAN transceiver to enter standby mode after the controlled device goes into sleep mode, thereby reducing circuit power consumption.

[0018] In a second aspect, the present application further provides a method for waking up a dormant state. Applied to the control circuit of the first aspect, the method comprises:

[0019] Generate a first control signal according to the CAN bus message, and output a wake-up signal to a controlled device outside the control circuit according to the first control signal;

[0020] A second control signal is acquired, and a sleep signal is output to the controlled device according to the second control signal.

[0021] In the technical solution of the embodiment of the present application, the control circuit can realize the wake-up function and the sleep function, the circuit has a wide range of applications, and the circuit is built based on the CAN transceiver, which has low cost and can help reduce the production cost of electric vehicles.

[0022] In a third aspect, the present application further provides a battery management system, which includes a controller, a controlled device, and the control circuit of the first aspect.

[0023] In the technical solution of the embodiment of the present application, the control circuit enables the battery management system to have the function of automatically waking up the power supply and automatically putting the power supply into sleep mode, so that the functions of the battery management system are more complete. Moreover, the control circuit is built based on the CAN transceiver, which has low cost and can help reduce the cost of the battery management system.

[0024] In a fourth aspect, the present application further provides a vehicle, which includes a controller, a controlled device, and the control circuit according to the first aspect.

[0025] In the technical solution of the embodiment of the present application, the control circuit enables the vehicle to automatically wake up the power supply and automatically put the power supply into sleep mode, making the vehicle more functional. Moreover, the control circuit is built based on a CAN transceiver, which has low cost and can help reduce the production cost of the vehicle, thereby improving the cost-effectiveness of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the optional embodiments below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0027] FIG1 is a schematic structural diagram of a control circuit according to an embodiment of the present application;

[0028] FIG2 is a schematic structural diagram of a signal circuit in a control circuit according to an embodiment of the present application;

[0029] FIG3 is a schematic structural diagram of a switch circuit in a control circuit according to an embodiment of the present application;

[0030] FIG4 is a schematic diagram of a first switch circuit connection method according to an embodiment of the present application;

[0031] FIG5 is a schematic structural diagram of a first switching circuit according to an embodiment of the present application;

[0032] FIG6 is a schematic diagram of a first switch circuit connection method according to an embodiment of the present application;

[0033] FIG7 is a schematic structural diagram of a first switching circuit according to an embodiment of the present application;

[0034] FIG8 is a schematic structural diagram of a second switch circuit according to an embodiment of the present application;

[0035] FIG9 is a schematic structural diagram of a trigger circuit according to an embodiment of the present application;

[0036] FIG10 is a schematic structural diagram of a trigger circuit according to an embodiment of the present application;

[0037] FIG11 is a schematic diagram of a standby circuit connection method according to an embodiment of the present application;

[0038] FIG12 is a schematic diagram of a standby circuit connection method according to an embodiment of the present application;

[0039] FIG13 is a schematic structural diagram of a standby circuit according to an embodiment of the present application;

[0040] FIG14 is a schematic structural diagram of a standby circuit according to an embodiment of the present application. DETAILED DESCRIPTION

[0041] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0043] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0044] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0045] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0046] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0047] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0048] With the development of new energy technologies, electric vehicles are becoming increasingly popular. In electric vehicles, the battery management system can be awakened by a signal under specific conditions. Currently, this is mainly achieved by outputting the wake-up signal via chips with built-in CAN (Controller Area Network) wake-up functionality. However, chips with built-in CAN wake-up functionality are relatively expensive. Furthermore, chips with built-in CAN wake-up functionality do not have a sleep function.

[0049] This application provides a control circuit based on a CAN transceiver. CAN transceivers are relatively low-cost and suitable for mass production, which can help reduce the production cost of electric vehicles. Furthermore, the control circuit not only has a wake-up function but also a sleep function, making it more comprehensive and applicable to a wider range of applications.

[0050] The control circuit disclosed in the embodiments of the present application can be used in, but is not limited to, electrical devices such as vehicles, ships, or aircraft. The technical solutions involved in the embodiments of the present application are introduced below.

[0051] According to some embodiments of the present application, with reference to FIG1 , a control circuit is provided. The control circuit includes a CAN transceiver 10 and a signal circuit 20 connected to each other. The signal circuit 20 is connected to an external controlled device and a controller, respectively. The CAN transceiver 10 is configured to output a first control signal to the signal circuit 20 based on a CAN bus message. The signal circuit 20 is configured to output a wake-up signal to the controlled device based on the first control signal, and to output a sleep signal to the controlled device based on a second control signal output by the controller.

[0052] In an embodiment of the present application, the control circuit includes a CAN transceiver 10 and a signal circuit 20. The CAN transceiver 10 is connected to the signal circuit 20, and the signal circuit 20 is also connected to a controlled device and a controller outside the control circuit.

[0053] During the waking-up phase, the CAN transceiver 10 receives a CAN bus message from the CAN bus and outputs a first control signal to the signal circuit 20 based on the CAN bus message. The signal circuit 20 receives the first control signal and outputs a wake-up signal to the controlled device based on the first control signal. The wake-up signal is used to wake up the controlled device.

[0054] In the stage of putting the controlled device to sleep, the controller inputs a second control signal to the signal circuit 20 in the control circuit, and the signal circuit 20 outputs a sleep signal to the controlled device according to the second control signal. The sleep signal is used to instruct the controlled device to enter a sleep state.

[0055] The controlled device may be a power supply or other component in the vehicle, and the controller may be an MCU (Microcontroller Unit). The embodiments of the present application do not limit the CAN transceiver, controlled device, and controller, and they may be selected according to actual conditions.

[0056] In the above embodiment, the control circuit includes an interconnected CAN transceiver and a signal circuit, the signal circuit being connected to an external controlled device and a controller, respectively. The CAN transceiver outputs a first control signal to the signal circuit based on a CAN bus message. The signal circuit outputs a wake-up signal to the controlled device based on the first control signal, and outputs a sleep signal to the controlled device based on a second control signal output by the controller. Because the control circuit is built based on a CAN transceiver, the CAN transceiver is relatively low-cost and suitable for mass production, which can help reduce the production cost of electric vehicles. Moreover, this control circuit not only has a wake-up function but also a sleep function, making it more comprehensive and applicable to a wider range of applications.

[0057] According to some embodiments of the present application, referring to Figure 2, the signal circuit 20 includes a switching circuit 21 and a trigger circuit 22; the switching circuit 21 is respectively connected to the CAN transceiver 10 and the controller, and the trigger circuit 22 is respectively connected to the switching circuit 21 and the controlled device; the switching circuit 21 is used to output a trigger signal to the trigger circuit 22 according to a first control signal, and output a set signal to the trigger circuit 22 according to a second control signal; the trigger circuit 22 is used to output a wake-up signal to the controlled device according to the trigger signal, and output a sleep signal to the controlled device according to the set signal.

[0058] In an embodiment of the present application, the signal circuit 20 includes a switching circuit 21 and a trigger circuit 22; the switching circuit 21 is respectively connected to the CAN transceiver 10 and a controller outside the control circuit; the trigger circuit 22 is respectively connected to the switching circuit 21 and the controlled device.

[0059] During the controlled device wakeup phase, the CAN transceiver 10 receives CAN bus messages from the CAN bus and, based on the CAN bus messages, outputs a first control signal to the switch circuit 21. Switch circuit 21 receives the first control signal and, based on the first control signal, outputs a trigger signal to the trigger circuit 22. Trigger circuit 22 is triggered by the trigger signal and outputs a wakeup signal to the controlled device. The controlled device wakes up upon receiving the wakeup signal.

[0060] For example, the controlled device is a power supply, and the trigger circuit 22 outputs a wake-up signal to the power supply to wake up the power supply so that the power supply supplies power to electrical components in the vehicle.

[0061] During the hibernation phase, the external controller outputs a second control signal to the switch circuit 21. The switch circuit 21 receives the second control signal and, based on the second control signal, outputs a set signal to the trigger circuit 22. The trigger circuit 22 receives the set signal and, based on the set signal, outputs a hibernation signal to the controlled device. The controlled device receives the hibernation signal and enters a hibernation state under the control of the hibernation signal.

[0062] For example, the controlled device is a power supply, and the trigger circuit 22 outputs a sleep signal to the power supply, so that the power supply enters a sleep state and no longer supplies power to electrical components in the vehicle.

[0063] In the above embodiment, the signal circuit includes a switch circuit and a trigger circuit; the switch circuit is connected to the CAN transceiver and the controller respectively, and the trigger circuit is connected to the switch circuit and the controlled device respectively; the switch circuit outputs a trigger signal to the trigger circuit according to a first control signal, and outputs a set signal to the trigger circuit according to a second control signal; the trigger circuit outputs a wake-up signal to the controlled device according to the trigger signal, and outputs a sleep signal to the controlled device according to the set signal. The embodiment of the present application implements the wake-up and sleep functions through the switch circuit and the trigger circuit based on the CAN transceiver. The circuit has simple control logic and low construction cost, which can help reduce the production cost of electric vehicles.

[0064] According to some embodiments of the present application, referring to Figure 3, the switching circuit 21 includes a first switching circuit 211 and a second switching circuit 212; the first switching circuit 211 is respectively connected to the CAN transceiver 10 and the trigger circuit 22; the second switching circuit 212 is respectively connected to the trigger circuit 22 and the controller; the first switching circuit 211 is used to output a trigger signal to the trigger circuit 22 under the control of a first control signal; the second switching circuit 212 is used to output a set signal to the trigger circuit 22 under the control of a second control signal.

[0065] In the embodiment of the present application, the switch circuit 21 includes a first switch circuit 211 and a second switch circuit 212; the first switch circuit 211 is connected to the CAN transceiver 10 and the trigger circuit 22 respectively, and the second switch circuit 212 is connected to the trigger circuit 22 and an external controller respectively.

[0066] During the waking-up phase of the controlled device, the CAN transceiver 10 receives a CAN bus message from the CAN bus and, based on the CAN bus message, outputs a first control signal to the first switch circuit 211. The first switch circuit 211 receives the first control signal and, based on the first control signal, outputs a trigger signal to the trigger circuit 22. Upon receiving the trigger signal, the trigger circuit 22 is triggered and outputs a wake-up signal to the controlled device. The controlled device is awakened upon receiving the wake-up signal.

[0067] During the hibernation phase, the external controller outputs a second control signal to the second switch circuit 212. The second switch circuit 212 receives the second control signal and, based on the second control signal, outputs a set signal to the trigger circuit 22. The trigger circuit 22 receives the set signal and, based on the set signal, outputs a hibernation signal to the controlled device. Upon receiving the hibernation signal, the controlled device enters a hibernation state.

[0068] In the above embodiment, the switch circuit includes a first switch circuit and a second switch circuit; the first switch circuit is respectively connected to the CAN transceiver and the trigger circuit; the second switch circuit is respectively connected to the trigger circuit and the controller; the first switch circuit outputs a trigger signal to the trigger circuit under the control of a first control signal; and the second switch circuit outputs a set signal to the trigger circuit under the control of a second control signal. In the embodiment of the present application, the trigger circuit is triggered and set by the first switch circuit and the second switch circuit, respectively, thereby achieving wake-up and sleep functions. The circuit has a wide range of applications and low construction costs, which can help reduce the production cost of electric vehicles.

[0069] According to some embodiments of the present application, referring to Figure 4, the first switch circuit 211 is connected to the data output port RXD of the CAN transceiver 10; the first switch circuit 211 is used to obtain a first control signal output by the data output port RXD of the CAN transceiver 10, and output a trigger signal under the control of the first control signal.

[0070] In this embodiment of the present application, the CAN transceiver 10 is provided with at least one power port, a data input port TXD, and a data output port RXD. The power port can provide power and bias voltage to the CAN transceiver 10; the data input port TXD can receive CAN bus messages or controller input signals, and the data output port RXD can output control signals. The first switch circuit 211 is connected to the data output port RXD of the CAN transceiver 10.

[0071] During the waking-up phase of the controlled device, the data input port TXD of the CAN transceiver 10 receives a CAN bus message and outputs a first control signal from the data output port RXD according to the CAN bus message. The first switch circuit 211 receives the first control signal and, under the control of the first control signal, outputs a trigger signal to the trigger circuit 22.

[0072] In the above embodiment, the first switch circuit is connected to the data output port of the CAN transceiver; the first switch circuit receives a first control signal output by the data output port of the CAN transceiver and outputs a trigger signal under the control of the first control signal. In the present embodiment, the wake-up function is implemented through the data output port of the CAN transceiver. The CAN transceiver is relatively low-cost and suitable for mass production, which can help reduce the production cost of electric vehicles.

[0073] According to some embodiments of the present application, referring to Figure 5, the first switching circuit 211 includes a first switching tube M1; the control electrode of the first switching tube M1 is connected to the data output port RXD of the CAN transceiver 10, the first electrode of the first switching tube M1 is connected to the first power supply terminal V1, and the second electrode of the first switching tube M1 is connected to the trigger circuit 22.

[0074] In the embodiment of the present application, the first switch circuit 211 includes a first switch transistor M1, a resistor R1, a resistor R2, a resistor R3, a diode D1, a diode D2, and a capacitor C1. The control electrode of the first switch transistor M1 is connected to the data output port RXD of the CAN transceiver 10; the first electrode of the first switch transistor M1 is connected to the first end of the resistor R1, and the second end of the resistor R1 is connected to the first power supply terminal V1; the second electrode of the first switch transistor M1 is connected to the first end of the resistor R2, and the second end of the resistor R2 is connected to the trigger circuit 22; the second electrode of the first switch transistor M1 is also connected to the first end of the resistor R3, and the second end of the resistor R3 is grounded. The first end of the capacitor C1 is connected to the trigger circuit 22, and the second end of the capacitor C1 is grounded.

[0075] Taking the first switch tube M1 as an NMOS tube as an example, the CAN transceiver 10 outputs a high-level signal from the data output port RXD to the control electrode of the first switch tube M1; the first switch tube M1 is turned on under the control of the high-level signal, and the first power supply terminal V1, the resistor R1, the first switch tube M1, the resistor R2 and the ground terminal GND form a path, and the second electrode of the first switch tube M1 outputs a trigger signal to the trigger circuit 22 through the resistor R3.

[0076] The diode D1 and the diode D2 act as clamps to limit the voltage difference between the control electrode and the second electrode of the first switch tube M1 and protect the first switch tube M1. The capacitor C1 acts as a filter to filter out interference signals in the trigger signal.

[0077] The first switch circuit 211 may be implemented using a switch chip, which is not limited in the embodiment of the present application and may be configured according to actual conditions.

[0078] In the above embodiment, the first switching circuit includes a first switching transistor; a control electrode of the first switching transistor is connected to the data output port of the CAN transceiver, a first electrode of the first switching transistor is connected to the first power supply terminal, and a second electrode of the first switching transistor is connected to the trigger circuit. In the present embodiment, the first switching circuit is constructed based on the switching transistor, thereby enabling a wake-up function via the data output port of the CAN transceiver. The CAN transceiver is relatively low in cost, and the first switching circuit is easy to construct, making the wake-up function more easily implemented.

[0079] According to some embodiments of the present application, referring to Figure 6, the first switching circuit 211 is respectively connected to the high-level port CANH and the low-level port CANL of the CAN transceiver 10; the first switching circuit 211 is used to obtain the first control signal output by the high-level port CANL and the low-level port CANL, and output a trigger signal under the control of the first control signal.

[0080] In an embodiment of the present application, the CAN transceiver 10 may further include a high-level port CANH and a low-level port CANL. When the CAN transceiver 10 is in operation, the high-level port CANH outputs a high-level signal, and the low-level port CANL outputs a low-level signal. That is, the high-level port CANH and the low-level port CANL output differential signals. When the CAN transceiver 10 is in standby mode, both the high-level port CANH and the low-level port CANL output low-level signals. The first switch circuit 211 is connected to the high-level port CANH and the low-level port CANL of the CAN transceiver 10, respectively.

[0081] During the waking-up phase of the controlled device, the data input port TXD of the CAN transceiver 10 receives a CAN bus message and, based on the CAN bus message, outputs a high-level signal from the high-level port CANH and a low-level signal from the low-level port CANL. The first switch circuit 211 receives the high-level and low-level signals, i.e., receives the first control signal, and, under the control of the first control signal, outputs a trigger signal to the trigger circuit 22.

[0082] In the above embodiment, the first switch circuit is connected to the high-level port and the low-level port of the CAN transceiver, respectively; the first switch circuit receives the first control signal output by the high-level port and the low-level port, and outputs the trigger signal under the control of the first control signal. The embodiment of the present application implements the wake-up function through the high-level port and the low-level port of the CAN transceiver. The CAN transceiver is relatively low in cost and suitable for mass production, which can help reduce the production cost of electric vehicles.

[0083] According to some embodiments of the present application, referring to Figure 7, the first switching circuit 211 includes a second switching tube M2 and a comparator Com; the two input ports of the comparator Com are respectively connected to the high level port and the low level port of the CAN transceiver 10, and the output port of the comparator Com is connected to the control electrode of the second switching tube M2; the first electrode of the second switching tube M2 is connected to the second power supply terminal V2, and the second electrode of the second switching tube M2 is connected to the trigger circuit 22.

[0084] In the embodiment of the present application, the first switch circuit 211 includes a second switch tube M2, a comparator Com, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a diode D3, a diode D4 and a capacitor C2.

[0085] The positive input port of the comparator Com is connected to the first end of a resistor R4, the second end of which is connected to the high-level port CANH of the CAN transceiver 10. The negative input port of the comparator Com is connected to the first end of a resistor R5, the second end of which is connected to the low-level port CANL of the CAN transceiver 10. The output port of the comparator Com is connected to the control electrode of the second switch M2. The positive input port of the comparator Com is also connected to the first end of a resistor R6, the second end of which is grounded. The first end of a resistor R7 is connected to the negative input port of the comparator Com, and the second end of the resistor R7 is connected to the output port of the comparator Com.

[0086] The control electrode of the second switch M2 is connected to the output port of the comparator Com. The first electrode of the second switch M2 is connected to the first end of the resistor R8, and the second end of the resistor R8 is connected to the second power supply terminal V2. The second electrode of the second switch M2 is connected to the first end of the resistor R9, and the second end of the resistor R9 is connected to the trigger circuit 22. The second electrode of the second switch M2 is also connected to the first end of the resistor R10, and the second end of the resistor R10 is grounded. The first end of the capacitor C2 is connected to the trigger circuit 22, and the second end of the capacitor C2 is grounded.

[0087] Taking the second switch tube M2 as an NMOS tube as an example, the CAN transceiver 10 outputs a high-level signal from the data output port RXD to the control electrode of the second switch tube M2. Under the control of the high-level signal, the second switch tube M2 is turned on, and the second power supply terminal V2, the resistor R8, the second switch tube M2, the resistor R9 and the ground terminal GND form a path. The second electrode of the second switch tube M2 outputs a trigger signal to the trigger circuit 22 through the resistor R10.

[0088] The diode D3 and the diode D4 act as clamps to limit the voltage difference between the control electrode and the second electrode of the second switch tube M2, thereby protecting the second switch tube M2; the capacitor C2 acts as a filter to filter out interference signals in the trigger signal.

[0089] The first switch circuit 211 may be implemented using a switch chip, which is not limited in the embodiment of the present application and may be configured according to actual conditions.

[0090] In the above embodiment, the first switch circuit includes a comparator and a second switch tube; the two input ports of the comparator are respectively connected to the high-level port and the low-level port of the CAN transceiver, and the output port of the comparator is connected to the control electrode of the second switch tube; the first electrode of the second switch tube is connected to the second power supply terminal, and the second electrode of the second switch tube is connected to the trigger circuit. The embodiment of the present application uses the switch tube and the comparator to build the first switch circuit, thereby realizing the wake-up function through the high-level port and the low-level port of the CAN transceiver. The cost of the CAN transceiver is low, and the first switch circuit is easy to build, making the wake-up function easier to implement.

[0091] According to some embodiments of the present application, referring to FIG8 , the second switch circuit 212 includes a third switch tube M3 ; a control electrode of the third switch tube M3 is connected to the controller, a first electrode of the third switch tube M3 is respectively connected to the third power supply terminal V3 and the trigger circuit 22 , and a second electrode of the third switch tube M3 is grounded.

[0092] In the embodiment of the present application, the second switch circuit 212 includes a third switch transistor M3, a resistor R11, a resistor R12, a resistor R13, a diode D5, and a diode D6. The control electrode of the third switch transistor M3 is connected to the first end of the resistor R11, and the second end of the resistor R11 is connected to an external controller. The first electrode of the third switch transistor M3 is connected to the first end of the resistor R12, and the second end of the resistor R12 is connected to the third power supply terminal V3. The first electrode of the third switch transistor M3 is also connected to the trigger circuit 22. The second electrode of the third switch transistor M3 is grounded. The first end of the resistor R13 is connected to the control electrode of the third switch transistor, and the second end of the resistor R13 is grounded.

[0093] Taking the third switch tube M3 as an NMOS tube as an example, the controller outputs a high-level signal to the control electrode of the third switch tube M3 through the resistor R11; the third switch tube M3 is turned on under the control of the high-level signal, and the third power supply terminal, the resistor R12, the third switch tube M3 and the ground terminal GND form a path, and the first electrode of the second switch tube M2 outputs a trigger signal to the trigger circuit 22.

[0094] The diode D5 and the diode D6 function as clamps to limit the voltage difference between the control electrode and the second electrode of the third switch tube M3 , thereby protecting the third switch tube M3 .

[0095] The second switch circuit 212 may be implemented using a switch chip, which is not limited in the embodiment of the present application and may be configured according to actual conditions.

[0096] In the above embodiment, the second switching circuit includes a third switching transistor; the control electrode of the third switching transistor is connected to the controller, the first electrode of the third switching transistor is connected to the third power supply terminal and the trigger circuit, respectively, and the second electrode of the third switching transistor is grounded. In the present embodiment, the second switching circuit is constructed based on the switching transistor, and can be used in conjunction with the trigger circuit to implement a sleep function, thereby expanding the scope of application of the circuit.

[0097] According to some embodiments of the present application, referring to Figures 9 and 10, the trigger circuit 22 includes a trigger T, the input port D of the trigger T is connected to the fourth power supply terminal V4, the trigger port CP of the trigger T is connected to the first switch circuit 211, the set port MR of the trigger T is connected to the second switch circuit 212, and the output port Q of the trigger T is connected to the controlled device.

[0098] In the embodiment of the present application, the trigger circuit 22 includes a trigger T, a resistor R14, and a capacitor C3. The trigger T is provided with an input port D, a trigger port CP, a set port MR, and an output port Q. The input port CP of the trigger T is connected to the first end of the resistor R14, and the second end of the resistor R14 is connected to the fourth power supply terminal V4. The trigger port CP of the trigger T is connected to the second terminal of the switch in the first switch circuit 211. The set port MR of the trigger T is connected to the first terminal of the switch in the second switch circuit 212. The output port Q of the trigger T is connected to the controlled device. In some embodiments, a device such as a diode or resistor may be connected between the output port Q of the trigger T and the controlled device.

[0099] During the controlled device wakeup phase, the switch in the first switch circuit 211 is turned on, and a high-level signal is input from the second electrode of the switch to the trigger port CP of the flip-flop T. Since the input port D of the flip-flop T is connected to the fourth power supply terminal V4 via the resistor R13, after receiving the high-level signal at the trigger port CP, the flip-flop T outputs a high-level signal to the controlled device. This high-level signal is used to wake up the controlled device. During this phase, the external controller does not output the second control signal to the second switch circuit 212. Therefore, the switch in the second switch circuit 212 is turned off, and the set port MR of the flip-flop T receives a high-level signal, which does not set the flip-flop T.

[0100] During the sleep phase of the controlled device, the controller outputs a high-level signal, i.e., a second control signal, to the second switch circuit 212. The switch tube in the second switch circuit 212 is turned on, and the trigger T receives a low-level signal at the set port MR, setting the trigger T. The trigger T outputs a low-level signal to the controlled device, which indicates that the controlled device enters the sleep state.

[0101] In the above embodiment, the trigger circuit includes a trigger, an input port of the trigger is connected to the fourth power supply terminal, a trigger port of the trigger is connected to the first switch circuit, a set port of the trigger is connected to the second switch circuit, and an output port of the trigger is connected to the controlled device. The embodiment of the present application builds a trigger circuit based on the trigger, thereby realizing wake-up and sleep functions, thereby expanding the scope of application of the circuit.

[0102] According to some embodiments of the present application, referring to Figures 11 and 12, the control circuit also includes a standby circuit 23, which is connected to the CAN transceiver 10 and the controller respectively; the standby circuit 23 is used to obtain a third control signal output by the controller and output a standby signal to the CAN transceiver 10 under the control of the third control signal.

[0103] In the embodiment of the present application, the control circuit further includes a standby circuit 23 , which is connected to the CAN transceiver 10 and an external controller respectively.

[0104] During the hibernation phase of the controlled device, the external controller, after determining that the trigger circuit 22 outputs a hibernation signal, outputs a third control signal to the standby circuit 23. The standby circuit 23 receives the third control signal and outputs a standby signal to the CAN transceiver 10; the standby signal is used to instruct the CAN transceiver to enter the standby state.

[0105] In the above embodiment, the control circuit further includes a standby circuit, which is connected to the CAN transceiver and the controller respectively. The standby circuit receives a third control signal output by the controller and, under the control of the third control signal, outputs a standby signal to the CAN transceiver. In the embodiment of the present application, the standby circuit causes the CAN transceiver to enter standby mode, thereby reducing circuit power consumption.

[0106] According to some embodiments of the present application, referring to Figures 13 and 14, the standby circuit 23 includes a fourth switch tube M4; the control electrode of the fourth switch tube M4 is connected to the controller, the first electrode of the fourth switch tube M4 is respectively connected to the fifth power supply terminal V5 and the standby port STB of the CAN transceiver 10, and the second electrode of the fourth switch tube M4 is grounded.

[0107] In the embodiment of the present application, the standby circuit 23 includes a fourth switch M4, a resistor R15, a resistor R16, a diode D7, and a diode D8. The control electrode of the fourth switch M4 is connected to the first end of the resistor R15, and the second end of the resistor R15 is connected to the controller; the first electrode of the fourth switch M4 is connected to the first end of the resistor R16, and the second end of the resistor R16 is connected to the fifth power supply terminal V5; and the second electrode of the fourth switch M4 is grounded. The CAN transceiver 10 is provided with a standby port STB, and the first electrode of the fourth switch M4 is also connected to the standby port STB of the CAN transceiver 10. The first end of the resistor R17 is connected to the control electrode of the fourth switch M4, and the second end of the resistor R17 is grounded.

[0108] Taking the fourth switch tube M4 as an NMOS tube as an example, in the sleep stage of the controlled device, the external controller outputs a low-level signal, i.e., the third control signal, to the fourth switch tube M4 after determining that the trigger circuit 22 outputs a sleep signal; the fourth switch tube M4 is turned off, and the potential of the standby port STB of the CAN transceiver 10 is pulled high, i.e., the standby port STB of the CAN transceiver 10 receives a high-level signal; the CAN transceiver 10 enters the standby state according to the high-level signal.

[0109] The diodes D7 and D8 can act as clamps to limit the voltage difference between the control electrode and the second electrode of the fourth switch tube M4, thereby protecting the fourth switch tube M4. The standby circuit can be implemented using a switch chip, which is not limited in this embodiment of the present application.

[0110] The first power supply terminal, the second power supply terminal, the third power supply terminal, the fourth power supply terminal and the fifth power supply terminal in the above embodiment can be set to power supply terminals of the same voltage or to power supply terminals of different voltages, and the embodiments of the present application do not limit this.

[0111] In the above embodiment, the standby circuit includes a fourth switch; the control electrode of the fourth switch is connected to the controller, the first electrode of the fourth switch is connected to the fifth power supply terminal and the standby port of the CAN transceiver, respectively, and the second electrode of the fourth switch is grounded. In this embodiment of the present application, by building a standby circuit based on the switch, the CAN transceiver can enter standby mode after the controlled device goes into sleep mode, thereby reducing circuit power consumption.

[0112] According to some embodiments of the present application, a method for waking up from sleep is provided, which is illustrated using the control circuit applied to the above-mentioned embodiment. The method may include: generating a first control signal according to a CAN bus message, and outputting a wake-up signal to a controlled device outside the control circuit according to the first control signal; obtaining a second control signal, and outputting a sleep signal to the controlled device according to the second control signal.

[0113] Referring to Figure 9 , during the controlled device wake-up phase, the CAN transceiver 10 receives CAN bus messages from its data input port TXD and outputs a high-level signal from its data output port RXD based on the CAN bus message. The first switch M1 is turned on by the high-level signal and outputs a high-level signal to the trigger port CP of the trigger T. Based on this high-level signal, the trigger T outputs a high-level signal to the controlled device, waking it up.

[0114] During the hibernation phase, an external controller inputs a high-level signal to the third switch M3. This high-level signal turns the third switch M3 on, lowering the potential of the second electrode of the third switch M3. The set port of the trigger T receives a low-level signal, setting the output signal of the trigger T. This causes the trigger T to output a low-level signal to the controlled device, which puts the controlled device into a hibernation state.

[0115] For example, if the controlled device is a power supply, and the power supply enters a dormant state and no longer supplies power to the controller, the controller ceases operation and outputs a low-level signal to the data input port TXD of the CAN transceiver 10. After receiving the low-level signal from the data input port TXD, the CAN transceiver 10 outputs a low-level signal from the data output port RXD. The first switch M1 is turned off under the control of the low-level signal, and the potential of the second electrode of the first switch M1 is pulled low. The trigger port CP of the trigger T receives the low-level signal, and the trigger T is no longer triggered.

[0116] After the controller stops working, it also inputs a low-level signal to the standby circuit 23. The standby circuit 23 inputs a high-level signal to the standby port STB of the CAN transceiver according to the low-level signal. The CAN transceiver enters the standby mode according to the high-level signal.

[0117] Referring to Figure 10 , during the wake-up phase of a controlled device, the CAN transceiver 10 receives CAN bus messages from its data input port TXD. Based on the CAN bus messages, it outputs a high-level signal from its high-level port CANH and a low-level signal from its low-level port CANL. The comparator Com receives a high-level signal at its positive input port and a low-level signal at its negative input port. Based on the received high-level and low-level signals, it outputs a high-level signal from its output port. The second switch M2 turns on under the control of the high-level signal and outputs a high-level signal to the trigger port CP of the trigger T. In response to this high-level signal, the trigger T outputs a high-level signal to the controlled device, waking it up.

[0118] During the hibernation phase, an external controller inputs a high-level signal to the third switch M3. This high-level signal turns the third switch M3 on, lowering the potential of the second electrode of the third switch M3. The set port of the trigger T receives a low-level signal, setting the trigger T and causing it to output a low-level signal to the controlled device, which puts the controlled device into a hibernation state.

[0119] For example, if the controlled device is the power supply, the power supply enters a dormant state and stops supplying power to the controller. The controller stops operating and outputs a low-level signal to the data input port TXD of the CAN transceiver 10. After the CAN transceiver 10 receives the low-level signal from the data input port TXD, both the high-level port CANH and the low-level port CANL of the CAN transceiver 10 output low-level signals. The low-level signal turns off the first switch M1, lowering the potential of the second electrode of the first switch M1. The trigger port CP of the trigger T receives the low-level signal, and the trigger T is no longer triggered.

[0120] After the controller stops working, it also inputs a low-level signal to the standby circuit 23. The standby circuit 23 inputs a high-level signal to the standby port STB of the CAN transceiver according to the low-level signal. The CAN transceiver enters the standby mode according to the high-level signal.

[0121] In the above embodiment, the control circuit generates a first control signal based on a CAN bus message and outputs a wake-up signal to a controlled device outside the control circuit based on the first control signal; obtains a second control signal and outputs a sleep signal to the controlled device based on the second control signal. The control circuit of the embodiment of the present application can implement both wake-up and sleep functions, and the circuit has a wide range of applications. Moreover, the circuit is built on a CAN transceiver, which is low-cost and can help reduce the production cost of electric vehicles.

[0122] According to some embodiments of the present application, a battery management system is provided, which includes the control circuit in the above embodiment.

[0123] In an embodiment of the present application, a power management system includes a controller, a controlled device, and the control circuit of the above embodiment. The control circuit includes a CAN transceiver, a signal circuit, and a standby circuit connected to each other; the signal circuit includes a first switch circuit, a second switch circuit, and a trigger circuit.

[0124] For example, in a power management system where the controller is an MCU and the controlled device is a power supply, the CAN transceiver in the control circuit receives CAN bus messages and, based on the CAN bus messages, outputs a first control signal to a first switching circuit. Based on the first control signal, the first switching circuit outputs a trigger signal to a trigger circuit. Based on the trigger signal, the trigger circuit outputs a wake-up signal to the power supply, waking it up. After waking up, the power supply continues to power the MCU.

[0125] The MCU receives the CAN bus message and outputs a second control signal to the second switch circuit. The second switch circuit outputs a set signal to the trigger circuit according to the second control signal; the trigger circuit outputs a sleep signal to the power supply according to the set signal. After receiving the sleep signal, the power supply enters the sleep state and stops supplying power to the MCU. The MCU also enters the sleep state and outputs a low-level signal to the CAN transceiver and the standby circuit in the control circuit. After receiving the low-level signal, the CAN transceiver outputs a low-level signal to the first switch circuit, and the first switch circuit no longer outputs a trigger signal to the trigger. After receiving the low-level signal, the standby circuit connects the standby port of the CAN transceiver to the fifth power supply terminal, so that the standby port of the CAN transceiver receives a high-level signal. The CAN transceiver enters the standby state according to the high-level signal. The power management system enters a low-power mode.

[0126] In the above embodiment, the power management system includes a controller, a controlled device and a control circuit; the control circuit enables the power management system to automatically wake up the power supply and automatically put the power supply to sleep, and the power management system has more complete functions. Moreover, the control circuit is built based on a CAN transceiver, and the CAN transceiver has low cost, which can help reduce the cost of the power management system.

[0127] According to some embodiments of the present application, a vehicle is provided, which includes a controller, a controlled device, and the control circuit according to the above embodiment.

[0128] In an embodiment of the present application, a vehicle includes a CAN bus, a controller, a controlled device, and the control circuit of the above embodiment. The control circuit includes a CAN transceiver, a signal circuit, and a standby circuit connected to each other; the signal circuit includes a first switch circuit, a second switch circuit, and a trigger circuit.

[0129] For example, if the controller is a vehicle MCU and the controlled device is a vehicle power supply, after the vehicle system is turned on, the CAN bus sends a CAN bus message. The CAN transceiver in the control circuit receives the CAN bus message and, based on the CAN bus message, outputs a first control signal to the first switch circuit. Based on the first control signal, the first switch circuit outputs a trigger signal to the trigger circuit. Based on the trigger signal, the trigger circuit outputs a wake-up signal to the power supply, waking it up. After waking up, the power supply continues to power the MCU.

[0130] After the entire vehicle system is shut down, the CAN bus sends a CAN bus message. The MCU receives the CAN bus message and outputs a second control signal to the second switch circuit. The second switch circuit outputs a set signal to the trigger circuit according to the second control signal; the trigger circuit outputs a sleep signal to the power supply according to the set signal. After receiving the sleep signal, the power supply enters the sleep state and stops supplying power to the MCU. The MCU also enters the sleep state and outputs a low-level signal to the CAN transceiver and the standby circuit in the control circuit. After receiving the low-level signal, the CAN transceiver outputs a low-level signal to the first switch circuit, and the first switch circuit no longer outputs a trigger signal to the trigger. After receiving the low-level signal, the standby circuit connects the standby port of the CAN transceiver to the fifth power supply terminal, so that the standby port of the CAN transceiver receives a high-level signal. The CAN transceiver enters the standby state according to the high-level signal. The entire vehicle system enters low-power mode.

[0131] In the above embodiment, the vehicle includes a controller, a controlled device and a control circuit; the control circuit enables the vehicle to automatically wake up the power supply and automatically put the power supply to sleep, making the vehicle more functional. Moreover, the control circuit is built based on a CAN transceiver, which has low cost and can help reduce the production cost of the vehicle, thereby improving the cost performance of the vehicle.

[0132] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0133] The above-described embodiments only express several implementation methods of the present application, which facilitate a specific and detailed understanding of the technical solutions of the present application, but cannot be understood as limiting the scope of protection of the invention patent. It should be pointed out that, for those skilled in the art, without departing from the concept of the present application, several variations and improvements can be made, which all fall within the scope of protection of the present application. It should be understood that the technical solutions obtained by those skilled in the art through logical analysis, reasoning or limited experiments on the basis of the technical solutions provided in the present application are all within the scope of protection of the attached claims described in the present application. Therefore, the scope of protection of the patent in this application shall be based on the content of the attached claims, and the description and drawings may be used to interpret the content of the claims.

Claims

1. A control circuit, characterized in that: The control circuit includes a CAN transceiver and a signal circuit connected to each other, and the signal circuit is connected to an external controlled device and a controller respectively; The CAN transceiver is used to output a first control signal to the signal circuit according to a CAN bus message; The signal circuit is used to output a wake-up signal to the controlled device according to the first control signal, and output a sleep signal to the controlled device according to the second control signal output by the controller.

2. The control circuit according to claim 1, characterized in that: The signal circuit includes a switch circuit and a trigger circuit; the switch circuit is connected to the CAN transceiver and the controller respectively, and the trigger circuit is connected to the switch circuit and the controlled device respectively; The switch circuit is used to output a trigger signal to the trigger circuit according to the first control signal, and output a set signal to the trigger circuit according to the second control signal; The trigger circuit is used to output the wake-up signal to the controlled device according to the trigger signal, and output the sleep signal to the controlled device according to the set signal.

3. The control circuit according to claim 2, characterized in that: The switch circuit comprises a first switch circuit and a second switch circuit; the first switch circuit is connected to the CAN transceiver and the trigger circuit respectively; the second switch circuit is connected to the trigger circuit and the controller respectively; The first switch circuit is used to output the trigger signal to the trigger circuit under the control of the first control signal; The second switch circuit is used to output the set signal to the trigger circuit under the control of the second control signal.

4. The control circuit according to claim 3, characterized in that: The first switch circuit is connected to the data output port of the CAN transceiver; The first switch circuit is used to obtain the first control signal output by the data output port of the CAN transceiver, and output the trigger signal under the control of the first control signal.

5. The control circuit according to claim 4, characterized in that: The first switch circuit includes a first switch tube; The control electrode of the first switch tube is connected to the data output port of the CAN transceiver, the first electrode of the first switch tube is connected to the first power supply end, and the second electrode of the first switch tube is connected to the trigger circuit Road connection.

6. The control circuit according to claim 3, characterized in that: The first switch circuit is connected to the high level port and the low level port of the CAN transceiver respectively; The first switch circuit is used to obtain the first control signal output by the high-level port and the low-level port, and output the trigger signal under the control of the first control signal.

7. The control circuit according to claim 6, characterized in that: The first switch circuit includes a comparator and a second switch tube; The two input ports of the comparator are respectively connected to the high level port and the low level port of the CAN transceiver, and the output port of the comparator is connected to the control electrode of the second switch tube; the first electrode of the second switch tube is connected to the second power supply end, and the second electrode of the second switch tube is connected to the trigger circuit.

8. The control circuit according to claim 3, characterized in that: The second switch circuit includes a third switch tube; The control electrode of the third switch tube is connected to the controller, the first electrode of the third switch tube is respectively connected to the third power supply terminal and the trigger circuit, and the second electrode of the third switch tube is grounded.

9. The control circuit according to claim 3, characterized in that: The trigger circuit includes a trigger, an input port of the trigger is connected to a fourth power supply terminal, a trigger port of the trigger is connected to the first switch circuit, a set port of the trigger is connected to the second switch circuit, and an output port of the trigger is connected to the controlled device.

10. The control circuit according to any one of claims 1 to 9, characterized in that: The control circuit further comprises a standby circuit, and the standby circuit is connected to the CAN transceiver and the controller respectively; The standby circuit is used to obtain a third control signal output by the controller, and output a standby signal to the CAN transceiver under the control of the third control signal.

11. The control circuit according to claim 10, characterized in that: The standby circuit includes a fourth switch tube; The control electrode of the fourth switch tube is connected to the controller, the first electrode of the fourth switch tube is respectively connected to the fifth power supply terminal and the standby port of the CAN transceiver, and the second electrode of the fourth switch tube is grounded.

12. A method for waking up from sleep, characterized in that: Applied to the control circuit according to any one of claims 1 to 11, the method comprises: Generate a first control signal according to the CAN bus message, and output a wake-up signal to a controlled device outside the control circuit according to the first control signal; A second control signal is acquired, and a sleep signal is output to the controlled device according to the second control signal.

13. A battery management system, characterized in that: The battery management system comprises a controller, a controlled device and a control circuit as described in any one of claims 1-11.

14. A vehicle, characterized in that: The vehicle comprises a controller, a controlled device and a control circuit as claimed in any one of claims 1-11.

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