Vehicle domain controller power management circuit, control method and vehicle

Abstract

The embodiment of the invention discloses a vehicle domain controller power supply management circuit, a control method and a vehicle, and belongs to the technical field of vehicle power supply, and the vehicle domain controller power supply management circuit comprises a first power supply domain corresponding to a power supply and a second power supply domain corresponding to a standby power supply, each of the first power supply domain and the second power supply domain comprises at least two trunk protection units, branch protection units and a control unit; the control unit in the first power domain or the control unit in the second power domain is used for setting the first target trunk protection unit to be in a bypass mode, setting the other trunk protection units to be in a turn-off mode and setting the other trunk protection units to be in a turn-off mode under the condition that a sleep instruction is obtained. And setting the over-current turn-off threshold value of the branch protection unit of each power supply domain as a first current. According to the invention, the dark current of the power management circuit of the vehicle domain controller in the dormant state can be reduced, and the safety of a protection device can be improved as much as possible.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of vehicle power supply technology, and relate to but are not limited to a vehicle domain controller power management circuit, a control method, and a vehicle. Background Art

[0002] With the rapid development of new energy technologies, electric vehicles have become widely popular, and many electric vehicles are equipped with assisted driving functions. This requires designing a power supply system with "fail-safe operation" capability for electric vehicles.

[0003] In related technologies, technicians often use a low-voltage domain-controlled power supply solution based on dual DC-DC circuits and dual batteries, using one set of DC-DC circuits and batteries as the primary power source and the other set of DC-DC circuits and batteries as a redundant power source. Multiple electronic fuses (EFUSEs) are designed to protect the power supply system. For safety reasons, the current monitoring direction of the EFUSEs on the main circuit needs to be directed outward from the board to monitor each power supply link in the power supply system. If any power supply link shorts, all EFUSEs on the main circuit are immediately disconnected to isolate the faulty power supply link and ensure normal power supply for driving safety.

[0004] However, in the related art, when the power supply system enters a dormant state, each EFuse whose current monitoring direction on the main circuit is inconsistent with the actual load current flow direction can only be fully conductive to provide sufficient driving power for the main circuit. This can minimize overcurrent damage to each EFuse on the main circuit and ensure the safety of the power supply system. However, there is a problem that the power supply system has a large dark current in the dormant state. Therefore, how to provide a power supply solution that can safely reduce dark current in the dormant state is a technical problem that needs to be solved urgently. Summary of the Invention

[0005] In view of this, the vehicle domain controller power management circuit, control method, and vehicle provided in the embodiments of the present application can achieve the effect of reducing the dark current of the vehicle domain controller power management circuit in the sleep state and ensuring the safety of the protection devices in the vehicle domain controller power management circuit as much as possible. The vehicle domain controller power management circuit, control method, and vehicle provided in the embodiments of the present application are implemented as follows:

[0006] According to a first aspect of an embodiment of the present application, a vehicle domain controller power management circuit is provided. The vehicle domain controller power management circuit includes a first power domain corresponding to a power supply and a second power domain corresponding to a backup power supply. Each of the first power domain and the second power domain includes at least two main line protection units, a branch line protection unit, and a control unit.

[0007] The control unit in the first power domain or the control unit in the second power domain is respectively configured to, upon receiving a sleep instruction, set a first target main circuit protection unit in the first power domain connected to the second power domain to a bypass mode, set other main circuit protection units except the first target main circuit protection unit to a shutdown mode, and set an overcurrent shutdown threshold of a branch circuit protection unit in each power domain to a first current;

[0008] The shutdown mode refers to a mode in which power is supplied to the load only through the body diode, and the first current is less than a current rating of the main circuit protection unit.

[0009] Optionally, the control unit in the first power domain or the control unit in the second power domain is further configured to, upon obtaining a wake-up instruction and completing initialization, set a second target main circuit protection unit in the second power domain connected to the backup power supply to an off mode, set other main circuit protection units except the second target main circuit protection unit to a fully on mode, and set the overcurrent shutdown threshold of the branch circuit protection unit in each power domain to a second current;

[0010] The second current is greater than a current rating of the main circuit protection unit.

[0011] Optionally, the first power domain includes a first main circuit protection device, a second main circuit protection device, at least one first branch circuit protection device and a first control unit, and the second power domain includes a third main circuit protection device, a fourth main circuit protection device, at least one second branch circuit protection device and a second control unit;

[0012] The first end of the first main line protection device is used to connect to a power supply, the second end of the first main line protection device is respectively connected to the first end of the second main line protection device, the first end of each of the first branch line protection devices, and the first end of the first control unit, the second end of the second main line protection device is connected to the first end of the third main line protection device, and the third end of the first main line protection device and the third end of the second main line protection device are respectively connected to the first control unit;

[0013] The second end of the third main line protection device is respectively connected to the first end of the fourth main line protection device, the first end of each of the second branch line protection devices, and the first end of the second control unit; the second end of the fourth main line protection device is used to connect to a backup power supply, and the third end of the third main line protection device and the third end of the fourth main line protection device are respectively connected to the second control unit;

[0014] The second end of each of the first branch circuit protection devices and the second end of each of the second branch circuit protection devices are respectively used to connect to a load.

[0015] Optionally, when the sleep instruction is obtained, the first control unit or the second control unit is also used to set the second main line protection device to the bypass mode, and set the first main line protection device, the third main line protection device and the fourth main line protection device to the shutdown mode.

[0016] Optionally, when the wake-up instruction is obtained and initialization is completed, the first control unit or the second control unit is also used to set the fourth main line protection device to the shutdown mode, and to set the first main line protection device, the second main line protection device and the third main line protection device to the full conduction mode.

[0017] Optionally, the first main line protection device, the second main line protection device, the third main line protection device and the fourth main line protection device respectively include electronic fuses; or,

[0018] The second main circuit protection device and the third main circuit protection device respectively include electronic fuses, and the first main circuit protection device and the fourth main circuit protection device respectively include P-channel switching tubes.

[0019] Optionally, the vehicle domain controller power management circuit further includes the power supply and the backup power supply.

[0020] A second aspect of the embodiments of the present application further provides a control method for a vehicle domain controller power management circuit, which is applied to the vehicle domain controller power management circuit. The method includes:

[0021] When the vehicle domain controller power management circuit obtains a sleep instruction, setting a first target trunk protection unit in the vehicle domain controller power management circuit to a bypass mode;

[0022] Setting the other main line protection units except the first target main line protection unit to an off mode, so that the other main line protection units except the first target main line protection unit supply power to the load only through the body diode;

[0023] The overcurrent shutdown threshold of each branch protection unit in the vehicle domain controller power management circuit is set to a first current, which is smaller than the current rating of the main protection unit.

[0024] Optionally, the method further includes:

[0025] When the vehicle domain controller power management circuit obtains a wake-up instruction and completes initialization, setting a second target trunk protection unit in the vehicle domain controller power management circuit to a shutdown mode;

[0026] Setting the other trunk protection units except the second target trunk protection unit to a full conduction mode;

[0027] The overcurrent shutdown threshold of each branch protection unit is set to a second current, and the second current is greater than the current rating of the main protection unit.

[0028] Optionally, the method further includes:

[0029] Upon receiving the target instruction, setting the third target main line protection unit in the vehicle domain controller power management circuit to a shutdown mode, so that the first power domain and the second power domain in the vehicle domain controller power management circuit are in an isolated state;

[0030] Setting the fourth target trunk protection unit in the vehicle domain controller power management circuit to a fully conductive state;

[0031] Among them, the third target main circuit protection unit includes a main circuit protection unit in the first power domain that is directly connected to the second power domain, and a main circuit protection unit in the second power domain that is directly connected to the first power domain; the fourth target main circuit protection unit includes a main circuit protection unit in the first power domain that is directly connected to the power supply, and a main circuit protection unit in the second power domain that is directly connected to the power supply.

[0032] Optionally, setting the overcurrent shutdown threshold of each branch protection unit to the second current includes:

[0033] Respectively detecting the switch status of each branch protection unit;

[0034] When any of the branch protection units is in an off state, setting the overcurrent shutdown threshold of any of the branch protection units to the second current;

[0035] Any of the branch protection units is set to the fully conductive mode.

[0036] According to a third aspect of an embodiment of the present application, a vehicle is further provided, which comprises at least any vehicle domain controller power management circuit provided in the first aspect.

[0037] In addition, an embodiment of the present application further provides a control device for a vehicle domain controller power management circuit, comprising:

[0038] a mode control module, configured to set a first target trunk protection unit in the power management circuit of the vehicle domain controller to a bypass mode when the power management circuit of the vehicle domain controller receives a sleep instruction;

[0039] The mode control module is further configured to set the other trunk protection units except the first target trunk protection unit to a shutdown mode, so that the other trunk protection units except the first target trunk protection unit supply power to the load only through the body diode;

[0040] A threshold control module is configured to set an overcurrent shutdown threshold of each branch protection unit in the vehicle domain controller power management circuit to a first current, where the first current is less than a current rating of the main protection unit.

[0041] An embodiment of the present application further provides a controller including a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and when the processor executes the program, the method described in the embodiment of the present application is implemented.

[0042] The computer-readable storage medium provided in the embodiment of the present application stores a computer program thereon, and when the computer program is executed by a processor, the method provided in the embodiment of the present application is implemented.

[0043] The vehicle domain controller power management circuit, control method, and vehicle provided in the embodiments of the present application control a first target main circuit protection unit connected to the second power domain in the first power domain to a bypass mode, and controls the modes of all main circuit protection units other than the first target main circuit protection unit to a shutdown mode, when the control unit of one of the first power domain and the second power domain receives a sleep instruction. The control unit corresponding to each power domain sets the overcurrent shutdown threshold of the branch circuit protection unit in each power domain to a first current.

[0044] By controlling the main line protection units other than the first target main line protection unit to the shutdown mode, the high current flowing through each main line protection unit in the first power domain and the second power domain can be cut off. This achieves the goal of providing power that can maintain the lowest power consumption to each branch circuit in the first power domain and each branch circuit in the second power domain. Moreover, because the first main line protection unit and the third main line protection unit only allow a small current to pass through, the dark current in the vehicle domain controller power management circuit can be minimized when the vehicle domain controller power management circuit is in a dormant state.

[0045] In addition, by setting the overcurrent shutdown threshold of the branch protection unit of each power domain to a first current that is less than the current rating of the main protection unit, if a load connected to a branch of the first power domain and / or the second power domain starts abnormally or a short circuit occurs in each branch, then, before the current flowing through each main protection unit reaches or exceeds the current rating of the main protection unit, the branch protection unit on the short-circuited or abnormal branch has already triggered the overcurrent protection, that is, the short-circuited or abnormal branch can be cut off from the vehicle domain controller power management circuit.

[0046] As can be seen, by setting the overcurrent shutdown threshold of the branch protection unit in each power domain to the first current, it is possible to directly disconnect abnormal loads or branch circuits before the main protection units are broken down or damaged. This ensures that the main protection units in the vehicle domain controller power management circuit will not be damaged or broken down due to overcurrent.

[0047] In this way, the dark current of the vehicle domain controller power management circuit in the sleep state can be reduced, and the safety of the protection components in the vehicle domain controller power management circuit can be ensured as much as possible, which can at least partially solve the technical problems raised in the background technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0049] Figure 1 A schematic structural diagram of a first vehicle domain controller power management circuit provided in an embodiment of the present application;

[0050] Figure 2 A schematic structural diagram of a second vehicle domain controller power management circuit provided in an embodiment of the present application;

[0051] Figure 3 A flowchart of a first method for controlling a vehicle domain controller power management circuit according to an embodiment of the present application;

[0052] Figure 4 A flowchart of a second method for controlling a vehicle domain controller power management circuit provided in an embodiment of the present application;

[0053] Figure 5 A flowchart of a third method for controlling a vehicle domain controller power management circuit according to an embodiment of the present application;

[0054] Figure 6 A flowchart of a fourth method for controlling a vehicle domain controller power management circuit according to an embodiment of the present application;

[0055] Figure 7 A flowchart of a fifth method for controlling a vehicle domain controller power management circuit provided in an embodiment of the present application;

[0056] Figure 8 A flowchart of a sixth method for controlling a vehicle domain controller power management circuit according to an embodiment of the present application;

[0057] Figure 9 A schematic structural diagram of a control device for a vehicle domain controller power management circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0058] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the specific technical solutions of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application but are not intended to limit the scope of the present application.

[0059] 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 pertains. The terms used herein are for the purpose of describing the embodiments of this application only and are not intended to limit this application.

[0060] In the following description, reference is made to “some embodiments”, which describes a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0061] It should be pointed out that the terms "first\second\third" involved in the embodiments of the present application are used to distinguish similar or different objects, and do not represent a specific ordering of the objects. It can be understood that "first\second\third" can be interchanged with a specific order or sequence where permitted, so that the embodiments of the present application described here can be implemented in an order other than that illustrated or described here.

[0062] In related technologies, technicians often use a low-voltage domain-controlled power supply solution based on dual DC-DC circuits and dual batteries, using one set of DC-DC circuits and batteries as the primary power source and the other set of DC-DC circuits and batteries as a redundant power source. Multiple electronic fuses (EFUSEs) are designed to protect the power supply system. For safety reasons, the current monitoring direction of the EFUSEs on the main circuit needs to be directed outward from the board to monitor each power supply link in the power supply system. If any power supply link shorts, all EFUSEs on the main circuit are immediately disconnected to isolate the faulty power supply link and ensure normal power supply for driving safety.

[0063] However, in the related art, when the power supply system enters a dormant state, each EFuse whose current monitoring direction on the main circuit is inconsistent with the actual load current flow direction can only be fully conductive to provide sufficient driving power for the main circuit. This can minimize overcurrent damage to each EFuse on the main circuit and ensure the safety of the power supply system. However, there is a problem that the power supply system has a large dark current in the dormant state. Therefore, how to provide a power supply solution that can safely reduce dark current in the dormant state is a technical problem that needs to be solved urgently.

[0064] To this end, an embodiment of the present application provides a vehicle domain controller power management circuit, wherein a first power domain corresponding to the power supply and a second power domain corresponding to the backup power are set in the vehicle domain controller power management circuit, and each of the first power domain and the second power domain includes at least two main circuit protection units, a branch circuit protection unit, and a control unit. The control unit in the first power domain or the control unit in the second power domain is respectively configured to, upon receiving a sleep instruction, set a first target main circuit protection unit in the first power domain connected to the second power domain to a bypass mode, and set all other main circuit protection units except the first target main circuit protection unit to a shutdown mode.

[0065] Furthermore, the overcurrent shutdown threshold of the branch circuit protection unit of each power domain is set to a first current. This shutdown mode is a mode in which power is supplied to the load only through the body diode, and the first current is less than the current rating of the main circuit protection unit. This reduces the dark current of the vehicle domain controller power management circuit in a dormant state and maximizes the safety of the protection components in the vehicle domain controller power management circuit.

[0066] The embodiments of this application are described using a vehicle domain controller power management circuit and a control method for the vehicle domain controller power management circuit as examples. However, this does not mean that the vehicle domain controller power management circuit provided in the embodiments of this application can only be used in vehicles, nor does it mean that the control method for the vehicle domain controller power management circuit provided in the embodiments of this application can only be used to control the vehicle domain controller power management circuit in a vehicle.

[0067] The following is a brief introduction to the vehicle domain controller power management circuit provided in the embodiment of the present application.

[0068] Figure 1 and Figure 2 This is a schematic diagram of the structure of a vehicle domain controller power management circuit provided by this application. The vehicle domain controller power management circuit can be applied to vehicles or any other possible devices, and this embodiment of the application does not limit this. Figure 1 and Figure 2 The embodiment of the present application provides a vehicle domain controller power management circuit A, which includes:

[0069] The first power domain 100 corresponding to the power supply D1 and the second power domain 200 corresponding to the backup power supply D2, each of the first power domain 100 and the second power domain 200 includes at least two main protection units, a branch protection unit and a control unit.

[0070] In this embodiment, the power supply D1 may refer to a power supply that is currently supplying power to the vehicle domain controller power management circuit A, various components in the vehicle domain controller power management circuit A, and a load connected to the vehicle domain controller power management circuit A.

[0071] In this embodiment, the backup power supply D2 may refer to a power supply that can supply power to the vehicle domain controller power management circuit A, various components in the vehicle domain controller power management circuit A, and loads connected to the vehicle domain controller power management circuit A, but is not currently supplying power.

[0072] Optionally, each trunk protection unit may be any controllable electronic device capable of disconnecting or connecting a power supply path. For example, each trunk protection unit may be an electronic fuse (eFuse), or a metal-oxide-semiconductor field-effect transistor (MOS), or any other possible device. This embodiment of the present application is not limited thereto.

[0073] Optionally, each branch protection unit may be any electronic device that can be controlled and has the function of disconnecting or connecting a power supply path. For example, each trunk protection unit may be an eFuse, or any other possible device. This embodiment of the present application does not limit this.

[0074] Optionally, the control unit may be any controller, processor, and / or chip having processing, control, identification, computing, and other functions. Furthermore, the control unit may be a single device or a combination of multiple devices. This is not limited in the present embodiment.

[0075] In a possible embodiment, the first trunk line protection device E1 , the second trunk line protection device E2 , the third trunk line protection device E3 , and the fourth trunk line protection device E4 may respectively include eFuse.

[0076] Optionally, in addition to the eFuse, the first main line protection device E1, the second main line protection device E2, the third main line protection device E3, and the fourth main line protection device E4 may also include at least one N-channel switching transistor, such as multiple NMOS transistors. In other words, the first main line protection device E1, the second main line protection device E2, the third main line protection device E3, and the fourth main line protection device E4 may each be composed of an eFuse and at least one NMOS transistor connected in parallel. In this case, the body diode in the main line protection unit mentioned above refers to the body diode of the NMOS transistor. This is not limited in this embodiment of the present application.

[0077] It is worth noting that when the first main line protection device E1, the second main line protection device E2, the third main line protection device E3, and the fourth main line protection device E4 all include eFuses, the vehicle domain controller power management circuit A can not only detect short-circuit faults between the first power domain 100 and the second power domain 200, but also detect short-circuit faults between the power supply and the backup power supply, as well as independent power supply between the first power domain 100 and the second power domain 200. This improves the current detection capability of the vehicle domain controller power management circuit A, thereby enhancing the safety and reliability of the vehicle domain controller power management circuit A.

[0078] In another possible embodiment, the second main circuit protection device E2 and the third main circuit protection device E3 may respectively include eFuse; the first main circuit protection device E1 and the fourth main circuit protection device E4 are P-channel switching transistors, for example, PMOS transistors.

[0079] It's worth noting that when the first main line protection device E1 and the fourth main line protection device E4 are P-channel switching transistors, the vehicle domain controller power management circuit A can avoid detecting short-circuit faults in the power supply and backup power supply, as well as the independent power supply of the first power domain 100 and the second power domain 200. This simplifies the control logic to a certain extent, thereby reducing the processing pressure on the first control unit K1 and the second control unit K2.

[0080] In one possible implementation, the control unit in the first power domain 100 or the control unit in the second power domain 200 is used to set the first target main circuit protection unit in the first power domain 100 connected to the second power domain 200 to bypass mode when a sleep instruction is obtained, set other main circuit protection units except the first target main circuit protection unit to shutdown mode, and set the overcurrent shutdown threshold of the branch circuit protection unit of each power domain to the first current.

[0081] Moreover, the shutdown mode refers to a mode in which power is supplied to the load only through the body diode, and the first current is less than the current rating of the main circuit protection unit. The current rating of the main circuit protection unit may refer to the maximum current value at which the main circuit protection unit will not be broken down or damaged by overcurrent.

[0082] Optionally, the sleep instruction can be used to cause the vehicle domain controller power management circuit A to enter a low-power sleep state. When the vehicle domain controller power management circuit A enters a low-power sleep state, no high current flows through the main line protection units in the vehicle domain controller power management circuit A. That is, the two power supplies corresponding to the vehicle domain controller power management circuit A (the power supply D1 and the backup power supply D2) will only provide the minimum amount of power to the power-consuming components in the vehicle domain controller power management circuit A and the loads connected to the vehicle domain controller power management circuit A, thereby maintaining necessary functions and reducing ineffective power consumption. Furthermore, the vehicle domain controller power management circuit A can detect circuit anomalies and maintain the ability to quickly wake up even in the sleep state, thereby shortening interrupt response delays.

[0083] Optionally, the sleep instruction may be sent by a device external to the vehicle domain controller power management circuit A to the control unit in the vehicle domain controller power management circuit A; or it may be automatically generated by the control unit in the vehicle domain controller power management circuit A when certain preset conditions are met. For example, the preset condition may be that the vehicle domain controller power management circuit A has not detected any power demand for a period of time, or that all loads connected to the vehicle domain controller power management circuit A have stopped operating. This embodiment of the present application is not limited to this.

[0084] In this embodiment, the first target trunk protection unit may be a trunk protection unit in the first power domain 100 connected to the power supply D1 currently supplying power and directly connected to the second power domain 200. For example, see Figure 1 , taking the power supply D1 currently being supplied as the power supply on the right as an example, the first target trunk protection unit may be the second trunk protection device E2 on the left side of the first power domain 100; or, continue to refer to Figure 2 Taking the power supply D1 currently supplying power as the power supply on the left as an example, the first target trunk protection unit can be the second trunk protection device E2 on the right side of the first power domain 100 .

[0085] For example, when the control unit of one of the first power domain 100 and the second power domain 200 receives a sleep instruction, the control unit in the first power domain 100 can control the first target main circuit protection unit and the other main circuit protection unit in the first power domain 100; and the control unit in the second power domain 200 can control the two main circuit protection units in the second power domain 200. This embodiment of the present application is not limited to this.

[0086] In this embodiment, the bypass mode refers to a mode in which a low-impedance channel is disconnected and a high-impedance channel is turned on, so that current is transmitted to the subsequent components through the high-impedance channel. For example, if a main circuit protection unit is composed of an eFuse and an NMOS tube, then when the main circuit protection unit is set to the bypass mode, the NMOS tube in the main circuit protection unit can be controlled to operate in the linear region or the critical saturation region. At this time, the on-resistance of the NMOS tube is high, and a high-impedance channel can be formed so that the main circuit protection unit can allow a smaller current to pass through. For another example, when a main circuit protection unit is in the bypass mode, the bypass mode of the main circuit protection unit can be in the ON state and the MOS is in the OFF state. The embodiments of the present application do not limit this.

[0087] In this embodiment, the shutdown mode refers to a mode in which the high-impedance channel and the low-impedance channel are disconnected so that the current cannot be transmitted to the subsequent components. For example, if a certain trunk protection unit is composed of an eFuse and an NMOS tube, then when the trunk protection unit is set to the shutdown mode, the NMOS tube in the trunk protection unit can be controlled to be completely shut down, and at this time, the current cannot be transmitted between the source and drain of the NMOS tube. If a certain trunk protection unit is composed of a PMOS tube, then when the trunk protection unit is set to the shutdown mode, the PMOS tube in the trunk protection unit can be controlled to be completely shut down, and at this time, the current cannot be transmitted between the source and drain of the PMOS tube. For another example, when a certain trunk protection unit is in the shutdown mode, the trunk protection unit can be in the bypass mode in the OFF state and the MOS in the OFF state. This embodiment of the present application does not limit this.

[0088] In an embodiment of the present application, when a control unit of one of the first power domain 100 and the second power domain 200 obtains a sleep instruction, the control unit corresponding to each power domain sets the first target main circuit protection unit in the first power domain 100 connected to the second power domain 200 to the bypass mode, and sets the other main circuit protection units except the first target main circuit protection unit to the shutdown mode. The control unit corresponding to each power domain sets the overcurrent shutdown threshold of the branch circuit protection unit of each power domain to the first current.

[0089] By setting the main line protection units other than the first target main line protection unit to shutdown mode, the high current flowing through each main line protection unit in the first power domain 100 and the second power domain 200 can be cut off. This achieves the goal of providing power that can maintain minimum power consumption to each branch circuit in the first power domain 100 and each branch circuit in the second power domain 200. Moreover, because the first main line protection unit and the third main line protection unit only allow low current to pass through, dark current in the vehicle domain controller power management circuit A can be minimized when the vehicle domain controller power management circuit A is in a dormant state.

[0090] In addition, by setting the overcurrent shutdown threshold of the branch protection unit of each power domain to a first current that is less than the current rating of the main protection unit, if a load connected to a branch of the first power domain 100 and / or the second power domain 200 starts abnormally or a short circuit occurs in each branch, then, before the current flowing through each main protection unit reaches or exceeds the current rating of the main protection unit, the branch protection unit on the short-circuited or abnormal branch has already triggered the overcurrent protection. That is, the short-circuited or abnormal branch can be cut off from the vehicle domain controller power management circuit.

[0091] As can be seen, by setting the overcurrent shutdown threshold of the branch protection unit in each power domain to the first current, it is possible to directly disconnect abnormal loads or branch circuits before the main protection units are broken down or damaged. This ensures that the main protection units in the vehicle domain controller power management circuit A will not be damaged or broken down due to overcurrent.

[0092] In this way, the dark current of the vehicle domain controller power management circuit A in a dormant state can be reduced, and the safety of the protection device in the vehicle domain controller power management circuit A can be improved as much as possible.

[0093] It should be noted that a power domain refers to a logical and physical power supply partition or control partition within a domain controller. In other words, each power domain can independently perform operations such as power on and off control, sleep and wake-up, and voltage monitoring.

[0094] Generally, each power domain can be connected to an independent power supply, and each power domain can include multiple corresponding electronic devices or functional modules.

[0095] Furthermore, there may be physical or logical electrical isolation measures between the first power domain 100 and the second power domain, for example, see Figure 1 The first power domain 100 and the second power domain 200 can be isolated by the second main circuit protection device E2 in the first power domain 100, or by the third main circuit protection device E3 in the second power domain 200. This allows the first power domain 100 or the second power domain 200 to be independently shut down or restarted without affecting the operation of other domains. Alternatively, when a short circuit, overvoltage, or other fault occurs within one power domain, electrical isolation can prevent the fault from affecting other power domains, significantly improving the reliability and safety of the vehicle domain controller power management circuit A.

[0096] For example, see Figure 1 In this example, the first power domain 100 can be the vehicle's right domain control unit (RDCU), and the second power domain 200 can be the vehicle's left domain control unit (LDCU). In this scenario, the first power domain 100 is responsible for integrating, controlling, and powering components in the vehicle's right area, such as the right door module, right lighting system, and right-side sensors. The second power domain 200 is responsible for integrating, controlling, and powering components in the vehicle's left area, such as the left door module, left lighting system, and left-side sensors.

[0097] In this embodiment, the first power domain 100 may specifically refer to a power supply partition or control partition that can directly receive the power output by the power supply D1; the second power domain 200 may specifically refer to a power supply partition or control partition that can directly receive the power output by the backup power supply D2. That is, when only the backup power supply D2 supplies power to the vehicle domain controller power management circuit A, the power output by the backup power supply D2 needs to be transmitted to the first power domain 100 through the second power domain 200, and the first power domain 100 cannot be powered directly from the backup power supply D2; when only the power supply D1 supplies power to the vehicle domain controller power management circuit A, the power output by the power supply D1 needs to be transmitted to the second power domain 200 through the first power domain 100, and the second power domain 200 cannot be powered directly from the power supply D1. This embodiment of the present application does not limit this.

[0098] In another possible implementation, the control unit in the first power domain 100 or the control unit in the second power domain 200 is also used to set the second target main circuit protection unit connected to the backup power supply D2 in the second power domain 200 to the shutdown mode after obtaining the wake-up instruction and completing the initialization, set the other main circuit protection units except the second target main circuit protection unit to the full conduction mode, and set the overcurrent shutdown threshold of the branch circuit protection unit of each power domain to the second current.

[0099] In this embodiment, initialization may mean that after power-on or reset, the control unit in the first power domain 100 or the control unit in the second power domain 200 configures its internal hardware resources (registers, clocks, etc.) through software to enable it to enter a normal working state.

[0100] Furthermore, the second current is greater than the rated current of the main line protection unit. Generally, the second current can be determined based on actual operating parameters of the vehicle domain controller power management circuit A. For example, the actual operating parameters of the vehicle domain controller power management circuit A may include parameters such as the normal operating current and / or peak current duration of each load connected to each branch line protection unit. This is not limited in this embodiment of the present application.

[0101] Optionally, the wake-up instruction can be used to enable the vehicle domain controller power management circuit A to enter a normal operating state. When the vehicle domain controller power management circuit A enters a normal operating state, a large current needs to flow through the mains protection unit in the vehicle domain controller power management circuit A. In other words, the power supply will provide electrical energy to the power-consuming components in the vehicle domain controller power management circuit A and the loads connected to the vehicle domain controller power management circuit A to enable them to operate normally.

[0102] Optionally, the wake-up instruction may be sent by a device external to the vehicle domain controller power management circuit A to the control unit in the vehicle domain controller power management circuit A; or the wake-up instruction may be automatically generated by the control unit in the vehicle domain controller power management circuit A when certain judgment conditions are met. For example, the judgment condition may be that the control unit in the vehicle domain controller power management circuit A detects that a load connected to the vehicle domain controller power management circuit A is awakened, or that at least one main line protection unit or branch line protection unit in the vehicle domain controller power management circuit A is connected via hardware. This embodiment of the present application is not limited to this.

[0103] In this embodiment, the second target trunk line protection unit may be a trunk line protection unit directly connected to the backup power source D2 that is not currently supplying power. Figure 1 , taking the power supply D1 currently being supplied as the power supply on the right as an example, the second target trunk protection unit can be the fourth trunk protection device E4 on the left side of the second power domain 200; or, continue to refer to Figure 2 Taking the power supply D1 currently supplying power as the power supply on the left as an example, the second target trunk protection unit can be the fourth trunk protection device E4 on the right side of the second power domain 200 .

[0104] In this embodiment, the fully conductive mode refers to a mode in which at least a low-impedance channel is fully conductive, so that current is transmitted to the subsequent components through the low-impedance channel, so that a large current can be transmitted to the subsequent components. For example, if a certain trunk protection unit is composed of an eFuse and an NMOS tube, then when the mode of the trunk protection unit is controlled to be fully conductive, the NMOS tube in the trunk protection unit can be controlled to be fully conductive or operate in a fully saturated region. At this time, the conduction impedance of the NMOS tube is low, and a low-impedance channel can be formed, so that the trunk protection unit can allow a larger current to pass through. For another example, when a certain trunk protection unit is in the fully conductive mode, the trunk protection unit can be in a state where at least the MOS is in the ON state, and the bypass mode can be switched according to actual needs. The embodiments of the present application are not limited to this.

[0105] It's worth noting that when a control unit in one of the first power domain 100 and the second power domain 200 receives a wake-up command, it indicates that the vehicle domain controller power management circuit A needs to enter normal operation. At this point, it's necessary to provide current sufficient for normal operation to the corresponding components and loads in the vehicle domain controller power management circuit A. Therefore, in this situation, a high current must be transmitted through the main circuit of the vehicle domain controller power management circuit A. By setting all main circuit protection units, except the second target main circuit protection unit, to full conduction mode, high current can flow through each main circuit protection unit in the first power domain 100 and the second power domain 200.

[0106] In this way, when the vehicle domain controller power management circuit A and the load connected to the vehicle domain controller power management circuit A are operating normally, the purpose of providing each branch in the first power domain 100 and each branch in the second power domain 200 with electric energy that enables them to operate normally can be achieved. In this way, it can be ensured that after the vehicle domain controller power management circuit A is awakened, the power supply function can be correctly realized.

[0107] It's worth noting that, since the loads on each branch circuit also require high current to operate when the vehicle domain controller power management circuit A is awakened, all the main circuit protection units (except for the second target main circuit protection unit) through which the current output by power supply D1 flows are fully conductive. Furthermore, even if a short circuit or abnormality occurs in a branch circuit, the main circuit protection units will not be broken down or damaged. This ensures that the loads on each branch circuit can be properly powered.

[0108] In one possible implementation, see Figure 1 and Figure 2 The at least two main circuit protection units included in the first power domain 100 may be a first main circuit protection device E1 and a second main circuit protection device E2, and the at least two main circuit protection units included in the second power domain 200 may be a third main circuit protection device E3 and a fourth main circuit protection device E4. Moreover, the branch circuit protection units included in the first power domain 100 may be as follows: Figure 1 and Figure 2 The first branch protection devices Z1 shown in FIG. 1 and the branch protection units included in the second power domain 200 may be as follows: Figure 1 and Figure 2 The second branch circuit protection devices Z2 are shown.

[0109] In addition, the control unit included in the first power domain 100 may be as follows Figure 1 and Figure 2The first control unit K1 shown in FIG. 1 , the control unit included in the second power domain 200 may be as follows Figure 1 and Figure 2 The second control unit K2 is shown.

[0110] That is, the first power domain 100 includes a first main circuit protection device E1, a second main circuit protection device E2, first branch circuit protection devices Z1, and a first control unit K1, and the second power domain 200 includes a third main circuit protection device E3, a fourth main circuit protection device E4, first branch circuit protection devices Z1, and a second control unit K2.

[0111] For example, from Figure 1 or Figure 2 It can be seen that the first end of the first main road protection device E1 is used to connect to the power supply D1, the second end of the first main road protection device E1 is respectively connected to the first end of the second main road protection device E2, the first end of each first branch road protection device Z1 and the first end of the first control unit K1, the second end of the second main road protection device E2 is connected to the first end of the third main road protection device E3, and the third end of the first main road protection device E1 and the third end of the second main road protection device E2 are respectively connected to the first control unit K1.

[0112] The second end of the third main road protection device E3 is respectively connected to the first end of the fourth main road protection device E4, the first end of each second branch road protection device Z2 and the first end of the second control unit K2. The second end of the fourth main road protection device E4 is used to connect to the backup power supply D2, and the third end of the third main road protection device E3 and the third end of the fourth main road protection device E4 are respectively connected to the second control unit K2.

[0113] The second end of each first branch protection device Z1 and the second end of each second branch protection device Z2 are respectively used to connect to a load. Generally, each first branch protection device Z1 and each second branch protection device Z2 can be connected to different loads, which is not limited in this embodiment of the application.

[0114] Specifically, when the sleep instruction is obtained, the first control unit K1 or the second control unit K2 is further used to set the second main line protection device E2 to the bypass mode, and set the first main line protection device E1, the third main line protection device E3 and the fourth main line protection device E4 to the shutdown mode.

[0115] It is worth noting that, as mentioned in the above embodiment, since the first main circuit protection device E1 can allow a tiny current output by the power supply D1 to pass through, when the vehicle domain controller power management circuit A is in a dormant state, the electric energy output by the power supply D1 can also pass through the first main circuit protection device E1 to the second main circuit protection device E2 and each branch in the first power domain 100. A very small current, such as 22 mA, is transmitted. Since the second main circuit protection device E2 is in bypass mode, the second main circuit protection device E2 can also allow a small current to pass through, and then the small current can be transmitted to the third main circuit protection device E3. Since the third main circuit protection device E3 can also allow a tiny current output by the second main circuit protection device E2 to pass through, the small current can be transmitted to each branch in the second power domain 200 and the fourth main circuit protection device E4.

[0116] In this way, the purpose of providing electric energy capable of maintaining minimum power consumption to each branch in the first power domain 100 and each branch in the second power domain 200 can be achieved. Moreover, since the first main circuit protection device E1 and the third main circuit protection device E3 only allow a small current to pass through, the dark current in the vehicle domain controller power management circuit A can be reduced as much as possible when the vehicle domain controller power management circuit A is in a dormant state.

[0117] Furthermore, because the fourth trunk line protection device E4 is connected between the third trunk line protection device E3 and the backup power supply D2, the current output by the power supply D1 flows through the body diode of the third trunk line protection device E3. Since the fourth trunk line protection device E4 is in shutdown mode and its body diode does not allow the current output by the third trunk line protection device E3 to pass through, this prevents the power supply D1 from being used as the power output by the backup power supply D2, thereby improving the safety of the vehicle domain controller power management circuit A.

[0118] Specifically, when the wake-up instruction is obtained and initialization is completed, the first control unit K1 or the second control unit K2 is also used to set the fourth main road protection device E4 to the shutdown mode, and set the first main road protection device E1, the second main road protection device E2 and the third main road protection device E3 to the full conduction mode.

[0119] It is worth noting that, as mentioned in the above embodiment, since the body diode of the fourth main circuit protection device E4 does not allow the current output by the third main circuit protection device E3 to pass through when the fourth main circuit protection device E4 is set to the shutdown mode, even when the vehicle domain controller power management circuit A is in the awake state, the electric energy output by the power supply D1 cannot be output to the backup power supply D2 through the fourth main circuit protection device E4.

[0120] However, by setting the first, second, and third trunk protection devices E1, E2, and E3 to the fully conductive mode, the power output by the power supply D1 can be normally delivered to each branch circuit. This ensures that, while the vehicle domain controller power management circuit A and the loads connected thereto are operating normally, the power supply D1 can be supplied to each branch circuit in the first power domain 100 and each branch circuit in the second power domain 200 to enable normal operation. This ensures that, after the vehicle domain controller power management circuit A is awakened, it can properly perform its power supply function.

[0121] In one possible implementation, see Figure 1 and Figure 2 , the first control unit K1 and the second control unit K2 can also be connected. Then, when the first control unit K1 obtains the sleep instruction, the first control unit K1 can send a corresponding instruction to the second control unit K2, so that the first control unit K1 can indirectly control the devices in the second power domain 200 through the second control unit K2. Correspondingly, when the second control unit K2 obtains the sleep instruction, the second control unit K2 can send a corresponding instruction to the first control unit K1, so that the second control unit K2 can indirectly control the devices in the first power domain 100 through the first control unit K1.

[0122] For example, see Figure 1 and Figure 2 The first control unit K1 and the second control unit K2 may include a microcontroller unit (MCU) and a system basis chip (SBC), respectively. This embodiment of the present application does not limit this.

[0123] Optionally, each eFuse is used to transmit electrical energy, and the eFuse in each branch circuit protection unit or branch circuit protection device can be used to supply power to a constant current load.

[0124] Generally, each eFuse may be provided with at least: a programmable threshold register for storing the overcurrent shutdown threshold (such as the first current or the second current); a current sampling resistor, and a comparison amplifier connected to the current sampling resistor; and may also include any other possible components, which are not limited in the embodiments of the present application.

[0125] Optionally, the vehicle domain controller power management circuit A may further include a mode detection unit, an input end of which is coupled to a low power mode indication signal (i.e., the sleep instruction) and a wake-up indication signal (i.e., the wake-up instruction) in the vehicle domain controller power management circuit A.

[0126] Optionally, the vehicle domain controller power management circuit A may further include a threshold selection unit, a first input end of the threshold selection unit being connected to the mode detection unit, a second input end of the threshold selection unit being connected to a programmable threshold register in the eFuse, and an output end of the threshold selection unit being connected to a reference end of a comparison amplifier in the eFuse.

[0127] Optionally, the vehicle domain controller power management circuit A may further include a driving switch network, wherein the input end of the driving switch network is connected to the mode detection unit, and the output end of the driving switch network respectively drives the switch tubes in the corresponding eFuse, such as NMOS tubes.

[0128] In addition, the eFuse and / or the vehicle domain controller power management circuit A may also include any other possible components, which can be specifically configured by relevant technicians according to actual needs, and the embodiments of the present application are not limited to this.

[0129] In another possible implementation, see Figure 2 The vehicle domain controller power management circuit A also includes the power supply D1 and the backup power supply D2. The connection relationship between the power supply D1 and the backup power supply D2 can refer to the description and Figure 2 , the embodiments of this application are not described in detail here.

[0130] Optionally, the power supply D1 and the backup power supply D2 may each include a battery and an OBC / DCDC. The battery may be a DC battery with a voltage level of 12V, 24V, or any other possible voltage value, and the OBC / DCDC may refer to a voltage output device including an onboard charger and / or a DC-DC converter. This embodiment of the present application is not limited to this.

[0131] In addition, the first power domain 100 and / or the second power domain 200 may further include a low dropout regulator (LDO), which is used to convert the voltage input to the LDO into a voltage with a lower voltage level, and then output it to subsequent devices. For example, the output end of the LDO can be connected to a corresponding sensor power distribution unit or other low-voltage power unit. If the output voltage of the power supply D1 is 12V or 24V, then the voltage level of the output voltage of the LDO and the sensor power distribution unit can be 5V. This embodiment of the present application is not limited to this.

[0132] In addition, the first power domain 100 and / or the second power domain 200 may further include a branch for powering the corresponding bridge driver circuit and / or limited slip differential (LSD). For example, if the output voltage of the power supply D1 is 24V, the voltage level of the output voltage to the bridge driver circuit and / or LSD may be 13.5V. This embodiment of the present application is not limited to this.

[0133] The connection relationship between the power supply D1, the backup power supply D2, the LDO, the sensor power distribution unit, the bridge drive circuit and / or the LSD can refer to the description and Figure 2 , the embodiments of this application are not described in detail here.

[0134] It should be noted that in Figure 1 In the example, the power supply currently supplying power to the two power domains in the vehicle domain controller power management circuit A is used as an example. However, in actual applications, for example Figure 2 As shown, the power supply on the left can also be used to power the two power domains in the vehicle domain controller power management circuit A. Figure 1 For example, Figure 2 The power supply on the left becomes the power supply, and the power domain on the left becomes the first power domain. Figure 2 The power supply on the right side becomes the backup power supply, and the power domain on the right side becomes the second power domain. This embodiment of the present application does not limit this.

[0135] It's worth noting that, for safety reasons, in this embodiment, the current monitoring directions of the first, second, third, and fourth main circuit protection devices E1, E2, E3, and E4 are all directed outward from the board. That is, the current monitoring directions of the first and third main circuit protection devices E1 and E3 are rightward, while the current monitoring directions of the second and fourth main circuit protection devices E2 and E4 are leftward. However, when the power supply D1 supplies power to the vehicle domain controller power management circuit A, the current output by the power supply D1 flows sequentially through the first main circuit protection device E1, the various branches in the first power domain 100, the second main circuit protection device E2, the third main circuit protection device E3, and the various branches in the second power domain 200. This indicates that, in the vehicle domain controller power management circuit A, the current monitoring directions of the first and third main circuit protection devices E1 and E3 do not align with the actual load current flow.

[0136] Moreover, the anode of the body diode of the MOS tube in the first main circuit protection device E1 is connected to the power supply D1, and the cathode of the body diode of the MOS tube in the first main circuit protection device E1 is connected to the second main circuit protection device E2; the anode of the body diode of the MOS tube in the third main circuit protection device E3 is connected to the second main circuit protection device E2, and the cathode of the body diode of the MOS tube in the third main circuit protection device E3 is connected to the fourth main circuit protection device E4.

[0137] When power supply D1 is supplying power, even if the MOSFETs in the first and third main circuit protection devices E1 and E3 are turned off, the current output by power supply D1 can still pass through the body diodes in the first and third main circuit protection devices E1 and E3, generating leakage current that is transmitted to downstream components. Furthermore, the current allowed to pass through the body diodes is very small. In other words, the first main circuit protection unit allows the tiny current output by power supply D1 to pass, and the third main circuit protection unit allows the tiny current output by the second main circuit protection unit to pass.

[0138] Furthermore, when backup power supply D2 is supplying power, even if the MOSFETs in the second main circuit protection device E2 and the fourth main circuit protection device E4 are turned off, the current output by backup power supply D2 can still pass through the body diodes in the second main circuit protection device E2 and the fourth main circuit protection device E4, generating leakage current that is transmitted to downstream components. Furthermore, the current allowed to pass through the body diodes is very small. In other words, the fourth main circuit protection unit allows the tiny current output by backup power supply D2 to pass, and the second main circuit protection unit allows the tiny current output by the third main circuit protection unit to pass.

[0139] In the above embodiment, the working principle of the vehicle domain controller power management circuit A provided in the embodiment of the present application, as well as the components and connection relationships that may be included in the vehicle domain controller power management circuit A are roughly described. Next, the working principle and specific control logic of the vehicle domain controller power management circuit A are introduced by explaining in detail the control method of the vehicle domain controller power management circuit provided in the embodiment of the present application.

[0140] Figure 3This is a flow chart of a control method for a vehicle domain controller power management circuit provided by the present application. This method can be applied to the vehicle domain controller power management circuit A described above and can be specifically executed by the first control unit K1 and the second control unit K2 in the vehicle domain controller power management circuit A. For example, the control unit in the first power domain 100, i.e., the first control unit K1, can execute the steps of controlling / detecting / communicating with components in the first power domain in the control method for the vehicle domain controller power management circuit described below; and the control unit in the second power domain 200, i.e., the second control unit K2, can execute the steps of controlling / detecting / communicating with components in the second power domain in the control method for the vehicle domain controller power management circuit described below.

[0141] In addition, the method can also be applied to any other possible domain controller or power supply circuit, which is not limited in the present embodiment.

[0142] See also Figure 3 , an embodiment of the present application provides a method for controlling a vehicle domain controller power management circuit, the method comprising:

[0143] Step 301: When the vehicle domain controller power management circuit obtains a sleep instruction, a first target trunk line protection unit in the vehicle domain controller power management circuit is set to a bypass mode.

[0144] Step 302: setting the other main line protection units except the first target main line protection unit to a shutdown mode, so that the other main line protection units except the first target main line protection unit only supply power to the load through the body diode.

[0145] The vehicle domain controller power management circuit obtaining the sleep instruction means that the control unit in the first power domain and / or the control unit in the second power domain of the vehicle domain controller power management circuit obtain the sleep instruction.

[0146] In this embodiment, the first power domain may refer to the aforementioned first power domain 100 , and the second power domain may refer to the aforementioned second power domain 200 .

[0147] It's worth noting that when the vehicle domain controller power management circuit receives a sleep instruction, it indicates that the vehicle domain controller power management circuit currently needs to enter a low-power sleep state. At this point, it only needs to maintain the necessary functions of the components in the vehicle domain controller power management circuit and minimize the power consumption of the vehicle domain controller power management circuit. Therefore, in this case, it is not necessary to transmit high current through the main line of the vehicle domain controller power management circuit. Therefore, by setting the other main line protection units other than the first target main line protection unit to shutdown mode, the high current flowing through each main line protection unit in the first power domain and the second power domain can be cut off.

[0148] For example, see Figure 1 and Figure 2 The first target trunk road protection unit may be the second trunk road protection device E2, and the other trunk road protection units except the first target trunk road protection unit may be the first trunk road protection device E1, the third trunk road protection device E3, and the fourth trunk road protection device E4.

[0149] However, as mentioned in the above embodiment, since the first main circuit protection device can allow the tiny current output by the power supply to pass through the body diode when it is in the shutdown mode, then when the vehicle domain controller power management circuit is in the sleep state, the electric energy output by the power supply can also be transmitted through the first main circuit protection device to the second main circuit protection device and each branch in the first power domain. A very small current, such as 22 milliamperes (mA). Since the second main circuit protection device is in the bypass mode, the second main circuit protection device can also allow the small current to pass through, and then the small current can be transmitted to the third main circuit protection device. Since the third main circuit protection device can also allow the tiny current output by the second main circuit protection device to pass through, the small current can be transmitted to each branch in the second power domain and the fourth main circuit protection device.

[0150] In this way, the purpose of providing electric energy capable of maintaining minimum power consumption to each branch in the first power domain and each branch in the second power domain can be achieved. Moreover, since the first main circuit protection device and the third main circuit protection device only allow a small current to pass through, the dark current in the vehicle domain controller power management circuit can be reduced as much as possible when the vehicle domain controller power management circuit is in a dormant state.

[0151] Step 303: setting the overcurrent shutdown threshold of each branch protection unit in the vehicle domain controller power management circuit to a first current.

[0152] Optionally, the first current is smaller than a current rating of the main circuit protection unit.

[0153] For example, the control unit in the first power domain may control each branch circuit protection unit in the first power domain, and the control unit in the second power domain may control each branch circuit protection unit in the first power domain. This embodiment of the present application does not limit this.

[0154] In one possible embodiment, when the vehicle domain controller power management circuit is in a dormant state, each branch circuit protection unit in the first power domain and the second power domain may be in the bypass mode. When the vehicle domain controller power management circuit is in an awake state, each branch circuit protection unit in the first power domain and the second power domain may be in the full conduction mode.

[0155] It is worth noting that when the vehicle domain controller power management circuit is in a dormant state, since the main line protection units other than the first target main line protection unit are in shutdown mode, and the main line protection units other than the first target main line protection unit can only allow a very small current to pass through the body diode, however, when the loads connected to the various branches of the first power domain and / or the second power domain are abnormally started or the various branches are short-circuited, it is possible that a transient large current will flow through the various main line protection units, and then, the main line protection units other than the first target main line protection unit may be broken down or damaged, such as the body diodes in the first main line protection unit and the third main line protection unit may be broken down.

[0156] It is worth noting that, since the current output by the power supply will also flow through the branch where the load is located during the process of the power supply supplying power to the corresponding load, and the branch is provided with a corresponding branch protection unit, therefore, when the load connected to a branch of the first power domain and / or the second power domain starts abnormally or each branch is short-circuited, the current flowing through the branch protection unit and each main protection unit on this branch will increase.

[0157] By setting the overcurrent shutdown threshold of the branch protection unit of each power domain to a first current that is less than the current rating of the main protection unit, when the current flowing through each main protection unit has not yet reached or exceeded the current rating of the main protection unit, the branch protection unit on the branch where a short circuit or abnormality occurs has already triggered the overcurrent protection. That is, the branch where a short circuit or abnormality occurs can be cut off from the vehicle domain controller power management circuit.

[0158] As can be seen, by setting the overcurrent shutdown threshold of the branch protection unit in each power domain to the first current, it is possible to directly disconnect abnormal loads or branches before the main protection units are broken down or damaged. This ensures that the main protection units (first and third main protection devices) in the vehicle domain controller power management circuit will not be damaged or broken down due to overcurrent.

[0159] by Figure 1 or Figure 2 Taking the vehicle domain controller power management circuit A as an example, it can be seen that the first power domain can include a first main line protection device and a second main line protection device, and the second power domain can include a third main line protection device and a fourth main line protection device. In this case, the embodiment of the present application also provides a possible implementation method, see Figure 4 , setting the first target trunk protection unit in the power management circuit of the vehicle domain controller to a bypass mode, comprising:

[0160] Step 3011: Set the mode of the second trunk line protection device to the bypass mode.

[0161] Continue to see Figure 4 , setting other trunk protection units except the first target trunk protection unit to a shutdown mode, including:

[0162] Step 3021: setting the first trunk line protection device, the third trunk line protection device, and the fourth trunk line protection device to the shutdown mode.

[0163] It is worth noting that, as mentioned in the above embodiment, since the first main circuit protection device can allow the tiny current output by the power supply to pass through, when the vehicle domain controller power management circuit is in a dormant state, the electric energy output by the power supply can also pass through the first main circuit protection device to the second main circuit protection device and each branch in the first power domain. A very small current, such as 22 mA, is transmitted. Since the second main circuit protection device is in bypass mode, the second main circuit protection device can also allow a small current to pass through, and then the small current can be transmitted to the third main circuit protection device. Since the third main circuit protection device can also allow the tiny current output by the second main circuit protection device to pass through, the small current can be transmitted to each branch in the second power domain and the fourth main circuit protection device.

[0164] In this way, the purpose of providing electric energy capable of maintaining minimum power consumption to each branch in the first power domain and each branch in the second power domain can be achieved. Moreover, since the first main circuit protection device and the third main circuit protection device only allow a small current to pass through, the dark current in the vehicle domain controller power management circuit can be reduced as much as possible when the vehicle domain controller power management circuit is in a dormant state.

[0165] Furthermore, because the fourth main line protection device is connected between the third main line protection device and the backup power supply, the current output by the power supply flows through the body diode of the third main line protection device. Since the fourth main line protection device is in shutdown mode and its body diode does not allow the current output by the third main line protection device to pass through, this prevents the power supply from being used as the backup power supply, thereby improving the safety of the vehicle domain controller power management circuit.

[0166] In one possible implementation, see Figure 5 , the method further comprises:

[0167] Step 304: When the vehicle domain controller power management circuit obtains the wake-up instruction and completes initialization, the second target trunk protection unit in the vehicle domain controller power management circuit is set to the shutdown mode.

[0168] Step 305: Set the other trunk protection units except the second target trunk protection unit to the full conduction mode.

[0169] It is worth noting that when the control unit of one of the power domains in the first power domain and the second power domain receives a wake-up instruction, it indicates that the vehicle domain controller power management circuit currently needs to enter a normal working state. At this time, it is necessary to provide the corresponding components and loads in the vehicle domain controller power management circuit with a current that can operate normally. Therefore, in this case, it is necessary to transmit a large current on the main line of the vehicle domain controller power management circuit. Then, by controlling the mode of other main line protection units except the second target main line protection unit to be in a fully conductive mode, a large current can be made to flow through each main line protection unit in the first power domain and the second power domain.

[0170] In this way, when the vehicle domain controller power management circuit and the load connected to the vehicle domain controller power management circuit are working normally, the purpose of providing each branch in the first power domain and each branch in the second power domain with electric energy that enables them to work normally can be achieved. In this way, it can be ensured that after the vehicle domain controller power management circuit is awakened, the power supply function can be correctly realized.

[0171] Step 306: Set the overcurrent shutdown threshold of each branch protection unit to the second current.

[0172] Optionally, the second current is greater than a current rating of the main circuit protection unit.

[0173] It is worth noting that, since the loads on each branch circuit also require high current to operate when the vehicle domain controller power management circuit is awakened, all the main circuit protection units (except for the second target main circuit protection unit) through which the current output by the power supply flows are in a fully conductive state. Furthermore, even if a short circuit or abnormality occurs in a branch circuit, the main circuit protection units will not be broken down or damaged. In this way, the loads on each circuit can be powered normally.

[0174] by Figure 1 or Figure 2 Taking the vehicle domain controller power management circuit A as an example, it can be seen that the first power domain can include a first main line protection device and a second main line protection device, and the second power domain can include a third main line protection device and a fourth main line protection device. In this case, in a possible implementation, see Figure 6 , setting the second target main line protection unit in the vehicle domain controller power management circuit to a shutdown mode, including:

[0175] Step 3041: Control the mode of the fourth trunk line protection device to the shutdown mode.

[0176] Continue to see Figure 6 , setting the other trunk protection units except the second target trunk protection unit to a full conduction mode, including:

[0177] Step 3051: Control the first trunk line protection device, the second trunk line protection device, and the third trunk line protection device to operate in the full conduction mode.

[0178] It is worth noting that, as mentioned in the above embodiment, since the mode of the fourth main line protection device is the shutdown mode, the body diode of the fourth main line protection device does not allow the current output by the third main line protection device to pass through. Even when the vehicle domain controller power management circuit is in the awake state, the electric energy output by the power supply cannot be output to the backup power supply through the fourth main line protection device.

[0179] However, the first, second, and third trunk protection devices are in the fully conductive mode, and the power supply can be normally supplied to each branch circuit. This ensures that, while the vehicle domain controller power management circuit and the load connected thereto are functioning normally, the power supply can be supplied to each branch circuit in the first power domain and each branch circuit in the second power domain to enable normal operation. This ensures that, after the vehicle domain controller power management circuit is awakened, it can properly perform its power supply function.

[0180] In one possible implementation, see Figure 7 , the method further comprises:

[0181] Step 307: upon receiving the target instruction, setting the third target main protection unit in the vehicle domain controller power management circuit to a shutdown mode, so that the first power domain and the second power domain in the vehicle domain controller power management circuit are in an isolated state.

[0182] Step 308: Setting the fourth target main line protection unit in the power management circuit of the vehicle domain controller to a fully conductive state.

[0183] Generally, steps 307 and 308 can be performed when the mode of the first main line protection device, the second main line protection device and the third main line protection device is the fully conductive mode, that is, after step 3051; in addition, steps 307 and 308 can also be performed after step 306, and steps 307 and 308 can also be performed after any other steps, which is not limited in the embodiments of the present application.

[0184] Optionally, the target instruction may be any instruction that requires the first power domain and the second power domain to enter an isolated state. For example, the target instruction may be an instruction for instructing a device equipped with the vehicle domain controller power management circuit to enter a high-voltage state. This embodiment of the present application is not limited to this.

[0185] In this embodiment, the third target main circuit protection unit may include a main circuit protection unit in the first power domain that is directly connected to the second power domain, and a main circuit protection unit in the second power domain that is directly connected to the first power domain. The fourth target main circuit protection unit includes a main circuit protection unit in the first power domain that is directly connected to the power supply, and a main circuit protection unit in the second power domain that is directly connected to the power supply.

[0186] For example, the above Figure 1 or Figure 2Taking the vehicle domain controller power management circuit A shown as an example, the third target trunk road protection unit may include a second trunk road protection device E2 and a third trunk road protection device E3, and the fourth target trunk road protection unit may include a first trunk road protection device E1 and a fourth trunk road protection device E4. This embodiment of the present application is not limited to this.

[0187] It's worth noting that this allows the first and second power domains to be isolated under certain operating conditions, allowing their respective power supplies to be directly supplied via the fourth target trunk protection unit. Using the aforementioned example, the power supply can be used to supply power to the first power domain via the first trunk protection device, while the backup power supply can be used to supply power to the second power domain via the fourth trunk protection device. This ensures the safety and stability of the vehicle domain controller's power management circuit under these conditions.

[0188] In one possible implementation, see Figure 8 , setting the overcurrent shutdown threshold of each branch protection unit to a second current, including:

[0189] Step 3061: Detect the switch status of each branch protection unit respectively.

[0190] Step 3062: When any branch protection unit is in the off state, the overcurrent shutdown threshold of any branch protection unit is set to the second current.

[0191] Step 3063: Set any branch protection unit to the full conduction mode.

[0192] It is worth noting that if, before the vehicle domain controller power management circuit enters normal operation, the branch protection unit on a certain branch has triggered overcurrent protection due to an abnormal fault such as a short circuit and is in shutdown mode, the above-mentioned first control unit and the above-mentioned second control unit need to respectively turn on the corresponding main line protection unit before the overcurrent shutdown threshold of the branch protection unit that has been shut down due to the fault can be reconfigured to the second current, and the branch protection unit that has been shut down due to the fault can be turned on.

[0193] In this way, the power supply can still supply power to the loads of each branch normally after a fault or anomaly occurs in each branch.

[0194] It should be understood that, although the steps in the above-mentioned flowcharts are shown in sequence according to the instructions of the arrows, these steps are not necessarily performed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be performed in other orders. Moreover, at least a portion of the steps in the above-mentioned flowcharts may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily performed at the same time, but can be performed at different times, and the execution order of these sub-steps or stages is not necessarily to be performed in sequence, but can be performed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

[0195] It should be understood that since the control method for the vehicle domain controller power management circuit provided in the embodiments of this application and any of the vehicle domain controller power management circuits provided above are based on the same inventive concept, the method may also include any other possible steps to achieve the functions and effects achieved by any of the vehicle domain controller power management circuits described above. Similarly, the vehicle domain controller power management circuit may also include any other possible components to perform any steps in the control method. This embodiment of the application does not elaborate on this.

[0196] Moreover, the above-mentioned control method is used to control the vehicle domain controller power management circuit provided by the aforementioned embodiment to achieve corresponding functions. The implementation principles and technical effects of the two are similar. That is, the implementation principles and technical effects of the control method and the circuit can confirm each other and will not be repeated here.

[0197] Based on the aforementioned embodiments, an embodiment of the present application provides a control device for a vehicle domain controller power management circuit, which includes the modules included and the units included in each module, and can be implemented by a processor; of course, it can also be implemented by a specific logic circuit; in the implementation process, the processor can be a central processing unit (CPU), a microprocessor (MPU), a digital signal processor (DSP) or a field programmable gate array (FPGA), etc.

[0198] Figure 9 This is a schematic diagram of the structure of a control device for a vehicle domain controller power management circuit provided by an embodiment of the present application, see Figure 9 , the device comprises:

[0199] A mode control module 401 is configured to set a first target trunk protection unit in the power management circuit of the vehicle domain controller to a bypass mode when the power management circuit of the vehicle domain controller receives a sleep instruction;

[0200] The mode control module 401 is further configured to set the other trunk protection units except the first target trunk protection unit to a shutdown mode, so that the other trunk protection units except the first target trunk protection unit supply power to the load only through the body diode.

[0201] The threshold control module 402 is configured to set the overcurrent shutdown threshold of each branch protection unit in the vehicle domain controller power management circuit to a first current, where the first current is less than the current rating of the main protection unit.

[0202] Optionally, the mode control module 401 can also be used to set the second target main line protection unit in the vehicle domain controller power management circuit to the shutdown mode when the vehicle domain controller power management circuit obtains a wake-up instruction and completes initialization; and set other main line protection units except the second target main line protection unit to the full conduction mode.

[0203] The threshold control module 402 may also be configured to set the overcurrent shutdown threshold of each branch protection unit to a second current, where the second current is greater than the current rating of the main protection unit.

[0204] The description of the above device embodiment is similar to the description of the above method embodiment and has similar beneficial effects as the method embodiment. For technical details not disclosed in the device embodiment of this application, please refer to the description of the method embodiment of this application for understanding.

[0205] It should be noted that in the embodiments of this application Figure 9 The module division of the control device of the vehicle domain controller power management circuit shown is schematic and represents only one logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional units in the various embodiments of this application may be integrated into a single processing unit, exist physically as separate units, or two or more units may be integrated into a single unit. These integrated units may be implemented in hardware or as software functional units. Alternatively, they may be implemented using a combination of software and hardware.

[0206] It should be noted that, in the embodiment of the present application, if the above method is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application, or the part that contributes to the relevant technology, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling an electronic device to execute all or part of the method of each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a U disk, a mobile hard disk, a read-only memory (ROM), a magnetic disk or an optical disk. In this way, the embodiment of the present application is not limited to any specific combination of hardware and software.

[0207] An embodiment of the present application provides a vehicle, which may at least include the vehicle domain controller power management circuit provided by any of the above embodiments.

[0208] In addition, the vehicle also includes any possible components such as a motor, a transmission mechanism, a chassis, a power battery, etc., which are not limited in the embodiments of the present application.

[0209] An embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the method provided in the above embodiment are implemented.

[0210] An embodiment of the present application provides a computer program product containing instructions, which, when executed on a computer, enables the computer to execute the steps of the method provided in the above method embodiment.

[0211] Those skilled in the art will understand that the various components in the vehicle provided in the embodiments of the present application are merely partial structures related to the scheme of the present application, and do not constitute a limitation on the vehicle provided by the scheme of the present application. A specific vehicle may include more or fewer components than those mentioned in the embodiments of the present application, or combine certain components, or have a different arrangement of components.

[0212] In one embodiment, the control device for the vehicle domain controller power management circuit provided herein can be implemented as a computer program that can be run on any possible electronic device (such as the aforementioned vehicle). The memory of the electronic device can store the various program modules that make up the aforementioned device. The computer program composed of these program modules causes a processor to execute the steps of the method of each embodiment of the present application described in this specification.

[0213] It should be noted that the description of the above storage medium and device embodiments is similar to the description of the above method embodiments and has similar beneficial effects as the method embodiments. For technical details not disclosed in the storage medium, storage medium, and device embodiments of this application, please refer to the description of the method embodiments of this application for understanding.

[0214] It should be understood that "one embodiment" or "an embodiment" or "some embodiments" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" or "in some embodiments" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. The above-mentioned serial numbers of the embodiments of the present application are for description only and do not represent the advantages and disadvantages of the embodiments. The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced to each other. For the sake of brevity, they will not be repeated here.

[0215] The term "and / or" in this article is only a description of the association relationship between associated objects, indicating that there can be three relationships. For example, object A and / or object B can mean: object A exists alone, object A and object B exist at the same time, and object B exists alone.

[0216] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0217] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The embodiments described above are merely illustrative. For example, the division of the modules is merely a logical function division. In actual implementation, there may be other division methods, such as: multiple modules or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or modules can be electrical, mechanical or other forms.

[0218] The modules described above as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules; they may be located in one place or distributed across multiple network units; some or all of the modules may be selected according to actual needs to achieve the purpose of this embodiment.

[0219] In addition, all functional modules in the embodiments of the present application can be integrated into one processing unit, or each module can be a separate unit, or two or more modules can be integrated into one unit; the above-mentioned integrated modules can be implemented in the form of hardware or in the form of hardware plus software functional units.

[0220] Those skilled in the art will understand that all or part of the steps of implementing the above-mentioned method embodiment can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above-mentioned method embodiment; and the aforementioned storage medium includes: mobile storage devices, read-only memories (ROM), magnetic disks or optical disks, and other media that can store program codes.

[0221] Alternatively, if the above-mentioned integrated unit of the present application is implemented in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application, or the part that contributes to the relevant technology, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for enabling an electronic device to execute all or part of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROMs, magnetic disks or optical disks.

[0222] The methods disclosed in the several method embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments.

[0223] The features disclosed in the several product embodiments provided in this application can be arbitrarily combined without conflict to obtain new product embodiments.

[0224] The features disclosed in the several method or device embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

[0225] The above is merely an embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

[0226] The foregoing description is merely a preferred embodiment of the present application and is not intended to limit the present application. Persons skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A vehicle domain controller power management circuit, characterized in that: The vehicle domain controller power management circuit includes a first power domain corresponding to the power supply and a second power domain corresponding to the backup power supply, each of the first power domain and the second power domain includes at least two main line protection units, a branch line protection unit and a control unit; The control unit in the first power domain or the control unit in the second power domain is respectively configured to, upon receiving a sleep instruction, set a first target main circuit protection unit in the first power domain connected to the second power domain to a bypass mode, set other main circuit protection units except the first target main circuit protection unit to a shutdown mode, and set an overcurrent shutdown threshold of a branch circuit protection unit in each power domain to a first current; The shutdown mode refers to a mode in which power is supplied to the load only through the body diode, and the first current is less than a current rating of the main circuit protection unit.

2. The vehicle domain controller power management circuit according to claim 1, characterized in that: The control unit in the first power domain or the control unit in the second power domain is further configured to, upon receiving a wake-up instruction and completing initialization, set a second target main circuit protection unit in the second power domain that is connected to the backup power supply to a shutdown mode, set other main circuit protection units except the second target main circuit protection unit to a fully on mode, and set an overcurrent shutdown threshold of a branch circuit protection unit in each power domain to a second current; The second current is greater than a current rating of the main circuit protection unit.

3. The vehicle domain controller power management circuit according to claim 1 or 2, characterized in that: The first power domain includes a first main circuit protection device, a second main circuit protection device, at least one first branch circuit protection device and a first control unit, and the second power domain includes a third main circuit protection device, a fourth main circuit protection device, at least one second branch circuit protection device and a second control unit; The first end of the first main line protection device is used to connect to a power supply, the second end of the first main line protection device is respectively connected to the first end of the second main line protection device, the first end of each of the first branch line protection devices, and the first end of the first control unit, the second end of the second main line protection device is connected to the first end of the third main line protection device, and the third end of the first main line protection device and the third end of the second main line protection device are respectively connected to the first control unit; The second end of the third main line protection device is respectively connected to the first end of the fourth main line protection device, the first end of each of the second branch line protection devices, and the first end of the second control unit; the second end of the fourth main line protection device is used to connect to a backup power supply, and the third end of the third main line protection device and the third end of the fourth main line protection device are respectively connected to the second control unit; The second end of each of the first branch circuit protection devices and the second end of each of the second branch circuit protection devices are respectively used to connect to a load.

4. The vehicle domain controller power management circuit according to claim 3, characterized in that: When the sleep instruction is obtained, the first control unit or the second control unit is further configured to set the second main line protection device to the bypass mode, and set the first main line protection device, the third main line protection device and the fourth main line protection device to the shutdown mode.

5. The vehicle domain controller power management circuit according to claim 3, wherein: When the wake-up instruction is obtained and initialization is completed, the first control unit or the second control unit is also used to set the fourth main road protection device to the shutdown mode, and to set the first main road protection device, the second main road protection device and the third main road protection device to the full conduction mode.

6. The vehicle domain controller power management circuit according to claim 3, characterized in that: The first main line protection device, the second main line protection device, the third main line protection device and the fourth main line protection device respectively include electronic fuses; or, The second main circuit protection device and the third main circuit protection device respectively include electronic fuses, and the first main circuit protection device and the fourth main circuit protection device respectively include P-channel switching tubes.

7. The vehicle domain controller power management circuit according to claim 1 or 2, characterized in that: The vehicle domain controller power management circuit further includes the power supply and the backup power supply.

8. A method for controlling a vehicle domain controller power management circuit, characterized in that: Applied to a vehicle domain controller power management circuit, the method includes: When the vehicle domain controller power management circuit obtains a sleep instruction, setting a first target trunk protection unit in the vehicle domain controller power management circuit to a bypass mode; Setting the other main line protection units except the first target main line protection unit to an off mode, so that the other main line protection units except the first target main line protection unit supply power to the load only through the body diode; The overcurrent shutdown threshold of each branch protection unit in the vehicle domain controller power management circuit is set to a first current, which is smaller than the current rating of the main protection unit.

9. The control method of the vehicle domain controller power management circuit according to claim 8, characterized in that: The method further comprises: When the vehicle domain controller power management circuit obtains a wake-up instruction and completes initialization, setting a second target trunk protection unit in the vehicle domain controller power management circuit to a shutdown mode; Setting the other trunk protection units except the second target trunk protection unit to a full conduction mode; The overcurrent shutdown threshold of each branch protection unit is set to a second current, and the second current is greater than the current rating of the main protection unit.

10. The control method of the vehicle domain controller power management circuit according to claim 9, characterized in that: The method further comprises: Upon receiving the target instruction, setting the third target main line protection unit in the vehicle domain controller power management circuit to a shutdown mode, so that the first power domain and the second power domain in the vehicle domain controller power management circuit are in an isolated state; Setting the fourth target trunk protection unit in the vehicle domain controller power management circuit to a fully conductive state; Among them, the third target main circuit protection unit includes a main circuit protection unit in the first power domain that is directly connected to the second power domain, and a main circuit protection unit in the second power domain that is directly connected to the first power domain; the fourth target main circuit protection unit includes a main circuit protection unit in the first power domain that is directly connected to the power supply, and a main circuit protection unit in the second power domain that is directly connected to the power supply.

11. The control method of the vehicle domain controller power management circuit according to claim 9, characterized in that: The step of setting the overcurrent shutdown threshold of each branch protection unit to the second current includes: Respectively detecting the switch status of each branch protection unit; When any of the branch protection units is in an off state, setting the overcurrent shutdown threshold of any of the branch protection units to the second current; Any of the branch protection units is set to the fully conductive mode.

12. A vehicle, characterized in that: At least includes the vehicle domain controller power management circuit according to any one of claims 1 to 7.

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