A power supply circuit and vehicle

Abstract

The utility model discloses an embodiment of a kind of power supply circuit and vehicle. The power supply circuit is the power supply circuit of vehicle, and the power supply circuit includes: first power supply module, second power supply module, at least one control module and at least one switch module;The switch module is connected between the first power supply module and target component, and between the second power supply module and the target component, and the control end of the control module is connected with the switch module;The control module is used to control the switch module to select the first power supply module and / or the second power supply module and power supply for the target component. The power supply circuit and vehicle provided in the utility model embodiment can realize the switching of different power supply modes, and reduce energy consumption.

Description

Technical Field

[0001] This utility model relates to power supply technology, and more particularly to a power supply circuit and a vehicle. Background Technology

[0002] With the rapid development of intelligent vehicles such as electric vehicles, the requirements for their safety and the expectations for their functionality in various scenarios are also increasing. As the power supply part of the vehicle's various electrical components, the vehicle's power supply circuit plays an important role in the vehicle's safety and functionality in various scenarios.

[0003] Currently, existing power supply circuits have problems such as the inability to switch power supply modes and high energy consumption. Utility Model Content

[0004] This utility model provides a power supply circuit and a vehicle to enable switching between different power supply modes and reduce energy consumption.

[0005] In a first aspect, this utility model embodiment provides a power supply circuit, which is a power supply circuit for a vehicle, and the power supply circuit includes:

[0006] The system comprises a first power supply module, a second power supply module, at least one control module, and at least one switch module.

[0007] The switch module is connected between the first power supply module and the target component, and between the second power supply module and the target component; the control module is connected to the control terminal of the switch module.

[0008] The control module is used to control the switching module to select the first power supply module and / or the second power supply module to supply power to the target component.

[0009] Optionally, the switching module includes:

[0010] A first switching component is connected between the first power supply module and the target component, and the control terminal of the first switching component is connected to the control module; the control module is used to control the first switching component to conduct under a first operating condition, so that the first power supply module supplies power to the target component;

[0011] A second switching component is connected between the second power supply module and the target component, and the control terminal of the second switching component is connected to the control module; the control module is used to control the second switching component to conduct under a second operating condition, so that the second power supply module supplies power to the target component;

[0012] The power consumption of the second power supply module is less than that of the first power supply module.

[0013] Optionally, the power supply circuit further includes:

[0014] A first power supply branch is connected between the first power supply module and the control module; the first power supply module is used to supply power to the control module through the first power supply branch;

[0015] The second power supply branch is connected between the second power supply module and the control module, and the second power supply module is used to supply power to the control module through the second power supply branch.

[0016] Optionally, the first switching component includes at least one first switching transistor, the first terminal of the first switching transistor is connected to the output terminal of the first power supply module, the second terminal of the first switching transistor is connected to the input terminal of the target component, and the control terminal of the first switching transistor is connected to the control module.

[0017] The second switching component includes at least one second switching transistor, the first terminal of the second switching transistor is connected to the output terminal of the second power supply module, the second terminal of the second switching transistor is connected to the input terminal of the target component, and the control terminal of the second switching transistor is connected to the control module.

[0018] Optionally, the first switching transistor includes a first body diode, the anode of the first body diode is connected to a first terminal of the first switching transistor, and the cathode of the first body diode is connected to a second terminal of the first switching transistor.

[0019] And / or, the second switching transistor includes a second body diode, the anode of the second body diode being connected to a first terminal of the second switching transistor, and the cathode of the second body diode being connected to a second terminal of the second switching transistor.

[0020] Optionally, when the first switching component includes at least two first switching transistors connected in series, the first terminal of the first first switching transistor is connected to the output terminal of the first power supply module, the second terminal of the first first switching transistor is connected to the second terminal of the second first switching transistor, the first terminal of the second first switching transistor is connected to the input terminal of the target component, and the control terminals of the first and second first switching transistors are both connected to the control module.

[0021] And / or, when the second switching component includes at least two second switching transistors connected in series, the first terminal of the first second switching transistor is connected to the output terminal of the second power supply module, the second terminal of the first second switching transistor is connected to the second terminal of the second second switching transistor, the first terminal of the second second switching transistor is connected to the input terminal of the target component, and the control terminals of the first and second second switching transistors are both connected to the control module.

[0022] Optionally, the first power supply branch includes a first diode, the anode of the first diode is connected to the output terminal of the first power supply module, and the cathode of the first diode is connected to the power supply terminal of the control module. The first power supply module is used to supply power to the control module through the first diode.

[0023] And / or, the second power supply branch includes a second diode, the anode of the second diode being connected to the output terminal of the second power supply module, and the cathode of the second diode being connected to the power supply terminal of the control module; the second power supply module is used to supply power to the control module through the second diode.

[0024] Optionally, the switch module further includes:

[0025] At least one load switch, wherein a first end of the first switch component is connected to the first power supply module, a first end of the second switch component is connected to the second power supply module, a second end of the first switch component and a second end of the second switch component are connected to a first node, the load switch is connected between the first node and the target component, and the control terminal of the load switch is connected to the control module.

[0026] Optionally, the target component includes at least one functional load element, and the load switch includes at least one fourth switching transistor;

[0027] The first terminal of the fourth switching transistor is connected to the first node, the second terminal of the fourth switching transistor is connected to the functional load element, and the control terminal of the fourth switching transistor is connected to the control module. Optionally, the fourth switching transistor and the functional load element are configured in a one-to-one correspondence.

[0028] Optionally, the control module includes:

[0029] The MCU has its power supply terminals connected to the first power supply module via a first power supply branch of the power supply circuit and to the second power supply module via a second power supply branch of the power supply circuit; the MCU's control terminals are connected to the control terminals of the first and second switching components of the switching module.

[0030] Optionally, the control terminal of the MCU is connected to the control terminal of the load switch of the switching module.

[0031] Optionally, the power supply circuit further includes:

[0032] A battery is connected in parallel with the first power supply module; the battery is used to supply power to the target component through the first switching component of the switching module, and / or to the control module through the first power supply branch of the power supply circuit;

[0033] The voltage of the second power supply module is greater than the full-charge voltage of the battery, and / or the voltage of the second power supply module is adjustable;

[0034] The first power supply module includes a first DC-DC converter, and the second power supply module includes a second DC-DC converter; the power consumption of the second DC-DC converter is less than the power consumption of the second DC-DC converter.

[0035] Optionally, the power supply circuit includes two control modules and two switching modules, and the target component includes a first target component and a second target component; the first target component includes a safety load element and a functional load element; the second target component includes a safety load element.

[0036] The two control modules include a first control module and a second control module; the two switch modules include a first switch module and a second switch module.

[0037] The first switch module is connected between the first power supply module and the first target component, and between the second power supply module and the first target component. The first control module is connected to the control terminal of the first switch module. The first control module is used to control the first switch module to select the first power supply module and / or the second power supply module to supply power to the first target component.

[0038] The second switch module is connected between the first power supply module and the second target component, and between the second power supply module and the second target component. The second control module is connected to the control terminal of the second switch module. The second control module is used to control the second switch module to select the first power supply module and / or the second power supply module to supply power to the second target component.

[0039] Optionally, the first switching component of the first switching module has the same structure as the first switching component of the second switching module, and the second switching component of the first switching module has the same structure as the second switching component of the second switching module; the first power supply branch of the first switching module has the same structure as the first power supply branch of the second switching module; and the second power supply branch of the first switching module has the same structure as the second power supply branch of the second switching module.

[0040] The load switch of the first switching module includes at least one fourth switching transistor;

[0041] The first terminal of the fourth switching transistor of the first switching module is connected to the first node, the second terminal of the fourth switching transistor of the first switching module is connected to the functional load element of the first target component, and the control terminal of the fourth switching transistor of the first switching module is connected to the first control module; the fourth switching transistor of the first switching module is configured to correspond one-to-one with the functional load element of the first target component.

[0042] Secondly, embodiments of the present invention provide a vehicle including a power supply circuit as described in the first aspect.

[0043] The power supply circuit and vehicle provided in this embodiment of the present invention are a power supply circuit for a vehicle. The power supply circuit includes: a first power supply module, a second power supply module, a control module, and a switch module. The control module is electrically connected to the control terminal of the switch module, the first terminal of the switch module is electrically connected to both the first and second power supply modules, and the second terminal of the switch module is electrically connected to a target component of the vehicle. The control module controls the operation of the switch module, enabling the first power supply module to supply power to the target component, and / or enabling the second power supply module to supply power to the target component. The power supply circuit and vehicle provided in this embodiment of the present invention, through the control module controlling the operation of the switch module, enable the first power supply module to supply power to the target component, and / or enable the second power supply module to supply power to the target component. In different scenarios, such as normal driving scenarios, collision scenarios (emergency power outage scenarios for the first power supply module), and special mode scenarios such as sentry mode, the on / off states of each switch unit are controlled differently to achieve switching between different power supply modes. Furthermore, when the second power supply module supplies power to the target component, there is no need to supply power to the entire vehicle, thereby solving the problem of high energy consumption caused by the first power supply module supplying power to both the target component and the entire vehicle, and achieving energy reduction. Attached Figure Description

[0044] Figure 1 This is a structural block diagram of a power supply circuit provided in Embodiment 1 of this utility model;

[0045] Figure 2 This is a structural block diagram of a power supply circuit provided in Embodiment 2 of this utility model;

[0046] Figure 3 This is a schematic diagram of a power supply circuit provided in Embodiment 2 of this utility model;

[0047] Figure 4 This is a schematic diagram of another power supply circuit provided in Embodiment 2 of this utility model. Detailed Implementation

[0048] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0049] Example 1

[0050] Figure 1 This is a structural block diagram of a power supply circuit provided in Embodiment 1 of this utility model. The power supply circuit is a vehicle power supply circuit, see reference. Figure 1 The power supply circuit includes: a first power supply module 10, a second power supply module 20, at least one control module 30, and at least one switch module 40; the switch module 40 is connected between the first power supply module 10 and the target component 200, and between the second power supply module 20 and the target component 200; the control module 30 is connected to the control terminal of the switch module 40; the control module 30 is used to control the switch module to select the first power supply module 10 and / or the second power supply module 20 to supply power to the target component 200.

[0051] The control module 30 is electrically connected to the control terminal of the switch module 40. The first terminal of the switch module 40 is electrically connected to the first power supply module 10 and the second power supply module 20, and the second terminal of the switch module 40 is electrically connected to the target component 200 of the vehicle. The control module 30 is used to control the operation of the switch module 40, so that the first power supply module 10 supplies power to the target component 200, and / or, so that the second power supply module 20 supplies power to the target component 200.

[0052] In an optional embodiment, the first power supply module 10 is a DC-to-DC power conversion device used to convert the DC power output from the vehicle's high-voltage battery pack into stable low-voltage DC power to meet the power supply needs of in-vehicle electronic equipment and auxiliary systems. The first power supply module 10 supplies power to various components of the vehicle that require power, such as thermal management components, and therefore consumes a significant amount of energy.

[0053] For example, the first power supply module 10 can be a first DC-DC converter, and for example, the first DC-DC converter can be a main DC-DC power supply module. The main DC-DC power supply module refers to a power supply circuit that converts the DC power output from the vehicle's high-voltage battery pack into a stable low-voltage DC power. The high-voltage side of the first DC-DC converter is equipped with a high-voltage relay R, used to convert the higher-voltage DC power into a lower-voltage DC power and output it as a step-down DC-DC power supply module. The first DC-DC converter can supply power to the entire vehicle.

[0054] In an optional embodiment, the second power supply module 20 is a DC-to-DC power conversion device. Exemplarily, the second power supply module 20 can be a second DC-DC converter. Exemplarily, the second DC-DC converter can be a low-power DC-DC (LDCDC) power supply module. A low-power DC-DC power supply module refers to a power supply circuit that converts the input DC voltage to a target DC voltage through high-efficiency circuit design while significantly reducing power consumption. Exemplarily, the second DC-DC converter can be a buck DC-DC power supply module.

[0055] Target component 200 refers to a load element connected to the first power supply module 10 and / or the second power supply module 20. Target component 200 may include safety load elements and / or functional load elements. Safety load elements refer to loads responsible for vehicle safety control, such as at least one of the vehicle's door handle motor, rear door child lock motor, rear door controller, and front door controller. Functional load elements refer to loads responsible for the vehicle's functional requirements, such as components corresponding to the vehicle's sentry mode, refrigerator components, etc.

[0056] Depending on the vehicle's operating conditions, the target component 200 is powered by different power supply modules. For example, in normal driving conditions, the control module 30 controls the switch module 40 to operate, causing the first power supply module 10 to supply power to the target component 200, while the second power supply module 20 has no output. If the first power supply module 10 malfunctions, such as in a collision scenario, the control module 30 controls the switch module 40 to operate, causing the second power supply module 20 to supply power to the target component 200. In special driving scenarios, such as Sentry Mode or a refrigerator with a delayed power-off, the control module 30 controls the switch module 40 to operate, causing the second power supply module 20 to supply power to the target component 200.

[0057] By controlling the operation of the switch module 40, the power supply module of the target component 200 is switched. In different scenarios, such as normal driving scenarios, when the first power supply module 10 is powered off, or in collision scenarios and special mode scenarios, different power supply modules supply power to the target component 200, thereby achieving the switching of the power supply mode corresponding to different scenarios. This setting, while satisfying collision redundancy unlocking and special mode power supply, has no impact on the power supply of the vehicle during normal driving.

[0058] Because vehicles can correspond to different target components 200 under different operating scenarios, the control module 30 controls the switch module 40 to select the first power supply module 10 and / or the second power supply module 20 to supply power to the target component 200. Depending on the vehicle's operating scenario, in some scenarios, the control module 30 selects the first power supply module 10 to supply power to the target component 200. In other scenarios, the control module 30 selects the second power supply module 200 to supply power to the target component 200. In scenarios with high safety requirements, both the first power supply module 10 and the second power supply module 200 can be selected to supply power to the target component 200, forming a redundant power supply state, improving the power supply reliability and flexibility of the target component 200.

[0059] For example, the first power supply module 10 can be a step-down circuit that converts the DC power output from the vehicle's high-voltage battery pack into a stable low-voltage DC power. Then, the second power supply module 20 can be another DC-to-DC step-down circuit. The second power supply module 20 can be configured to supply power to the target component 200 when the first power supply module 10 is powered down.

[0060] When the first power supply module 10 is a step-down circuit that converts the DC power output from the vehicle's high-voltage battery pack into a stable low-voltage DC power, its load is large, supplying power to the vehicle's electrical circuits, resulting in high power consumption. By setting up a second power supply module 20, a DC-to-DC power supply circuit separate from the first power supply module 10 is created within the vehicle. When the second power supply module 20 can provide sufficient power to the target component 200, the first power supply module 10 is no longer needed to supply power to the target component 200. Since the first power supply module 10 is a step-down circuit that converts the DC power output from the vehicle's high-voltage battery pack into a stable low-voltage DC power to supply power to the vehicle's electrical circuits, its power consumption is high. The second power supply module 20, however, can be configured to supply power only to a portion of the vehicle's electrical load, namely the target component 200. Compared to the first power supply module 10, the second power supply module 20 has a lower voltage, sufficient to meet the power supply requirements of the target component 200. Consequently, the power consumption of the second power supply module 20 is lower.

[0061] This configuration allows for flexible control of the power supply to the first power supply module 10 and / or the second power supply module 20 based on the vehicle's operating scenarios. Since the target component 200 is part of all the vehicle's load components, in some scenarios, it is unnecessary to activate the first power supply module 10, which supplies power to the entire vehicle, to supply power to the target component 200. This solves the problem of high energy consumption caused by the first power supply module 10 supplying power to both the target component 200 and the entire vehicle simultaneously. It also reduces power consumption when the second power supply module 20 supplies power to the target component 200 after the first power supply module 10 is powered down. Furthermore, the first power supply module 10 and the second power supply module 20 serve as backup power supplies for each other, improving the power supply reliability of the safety load components in the target component 200 across various scenarios.

[0062] The power supply circuit provided in this embodiment controls the operation of the switch module 40 through the control module 30, so that the first power supply module 10 supplies power to the target component 200, and / or the second power supply module 20 supplies power to the target component 200. This enables different power supply modules to supply power to the target component 200 in different scenarios, such as normal driving scenarios, scenarios where the first power supply module 10 is powered down in an emergency, and special mode scenarios such as sentry mode. This achieves the switching of power supply modes corresponding to different scenarios, satisfying collision redundancy unlocking and special mode power supply, while having no impact on the power supply of the vehicle during normal driving. Furthermore, when the second power supply module 20 supplies power to the target component 200, there is no need to supply power to the entire vehicle, thereby solving the problem of high energy consumption caused by the first power supply module 10 supplying power to the target component 200 while also supplying power to the entire vehicle, and achieving energy reduction.

[0063] Example 2

[0064] Figure 2 This is a structural block diagram of a power supply circuit provided in Embodiment 2 of this utility model. Figure 3 This is a schematic diagram of another power supply circuit provided in Embodiment 2 of this utility model. Figure 4 This is a schematic diagram of another power supply circuit provided in Embodiment 2 of this utility model. This embodiment is based on Embodiment 1, combined with... Figures 2 to 4 Optionally, the switch module 40 may include: a first switch component 41 connected between the first power supply module 10 and the target component 200, the control terminal of the first switch component 41 being connected to the control module 30; the control module 30 is used to control the first switch component 41 to conduct under a first operating condition, so that the first power supply module 10 supplies power to the target component 200; a second switch component 42 connected between the second power supply module 20 and the target component 200, the control terminal of the second switch component 42 being connected to the control module 30; the control module 30 is used to control the second switch component 42 to conduct under a second operating condition, so that the second power supply module 20 supplies power to the target component 200; wherein, the power consumption of the second power supply module 20 is less than the power consumption of the first power supply module 10.

[0065] Specifically, the first operating condition can include a scenario where the vehicle is driving normally. The second operating condition can include a scenario where the first power supply module 10 fails and loses power, or a scenario where the first power supply module 10 and the battery connected in parallel with the first power supply module 10 fail and lose power, or a scenario where both the first power supply module 10 and the battery lose power. For example, in a collision scenario, the first power supply module 10 will be open-circuited or short-circuited, thus failing to supply power to the load. For example, in some embodiments, the second operating condition can include a scenario where the first power supply module 10 fails, is detected, or is under maintenance and cannot supply power, which is not limited here.

[0066] The power consumption of the second power supply module 20 is less than that of the first power supply module 10. Compared with the scenario where the first power supply module 10 is powered on and supplies power to the target component 200, when the second power supply module 20 supplies power to the target component 200 alone, the lower power consumption of the second power supply module 20 effectively reduces the duration of the first power supply module 10 supplying power to the target component 200, which has higher power consumption. This allows the target component 200 to operate reliably under low power consumption, thereby reducing the overall power consumption of the vehicle and improving the vehicle's range.

[0067] In the first operating condition, the control module 30 controls the first switch component 41 to conduct, so that the first power supply module 10 supplies power to the target component 200. Since the first operating condition is a scenario of normal vehicle operation, the first power supply module 10 is in a powered-on state, which facilitates setting the first power supply module 10 to supply power to the target component 200. In the second operating condition, the control module 30 controls the second switch component 42 to conduct, so that the second power supply module 20 supplies power to the target component 200. Since the first power supply module 10 fails and loses power in the second operating condition, the control module 30, which has lower power consumption, supplies power to the target component 200, which can both ensure the reliability of the power supply to the target component 200 and effectively reduce the vehicle's power consumption.

[0068] Optionally, the power supply circuit further includes: a first power supply branch 50, connected between the first power supply module 10 and the control module 30; the first power supply module 10 is used to supply power to the control module 30 through the first power supply branch 50; and a second power supply branch 60, connected between the second power supply module 20 and the control module 30, the second power supply module 20 being used to supply power to the control module 30 through the second power supply branch 60.

[0069] Specifically, the first power supply branch 50 and the second power supply branch 60 form a redundant power supply, providing a reliable power supply to the control module 30 and ensuring reliable power-on of the control module 30. The control module 30 is used to control the on / off state of the first switching component 41 and the second switching component 42.

[0070] In the second operating condition, where real-time requirements are extremely high, such as in a collision scenario, the control module 30 controls the first switch component 41 to disconnect, isolating other power supplies and most unrelated power supply networks of the vehicle. This prevents other power supplies or networks from failing due to short circuits, thus isolating the second power supply module 20 from the short circuit point. The control module 30 then powers on and de-energizes the functional load components of the target component 200, cutting off the high-power-consumption functional load components of the target component 200. This ensures that the second power supply module 20 has sufficient power in scenarios requiring power, such as collision scenarios. The control module 30 also controls the second switch component 42 to power on, energizing the safety load component 212 of the target component 200, thereby ensuring reliable power supply to the safety load component 212 of the target component 200 in collision scenarios.

[0071] Optionally, the first switching component 41 includes at least one first switching transistor, the first terminal of which is connected to the output terminal of the first power supply module 10, the second terminal of which is connected to the input terminal of the target component 200, and the control terminal of which is connected to the control module 30; the second switching component 42 includes at least one second switching transistor, the first terminal of which is connected to the output terminal of the second power supply module 20, the second terminal of which is connected to the input terminal of the target component 200, and the control terminal of which is connected to the control module 30.

[0072] Specifically, both the first and second switching transistors can be switching devices such as MOSFETs or transistors. When the control terminal of the first switching transistor disconnects its first and second terminals according to the control command of the control module 30, the first power supply module 10 is disconnected from the target component 200. When the control terminal of the second switching transistor disconnects its first and second terminals according to the control command of the control module 30, the second power supply module 20 is disconnected from the target component 200. This configuration allows the control module 30 to control the MOSFETs to disconnect, isolating other power supplies and most unrelated power supply networks of the vehicle, thus preventing the second power supply module 20 from being isolated from short-circuit points if other power supplies or other power supply networks may fail to operate due to short circuits. After the second power supply module 20 is isolated from all possible short-circuit points, the second switching component 42 can be turned on as needed, allowing the second power supply module 20 to supply power to the target component 200.

[0073] Optionally, the first switching transistor includes a first body diode, the anode of the first body diode being connected to a first terminal of the first switching transistor, and the cathode of the first body diode being connected to a second terminal of the first switching transistor; and / or, the second switching transistor includes a second body diode, the anode of the second body diode being connected to a first terminal of the second switching transistor, and the cathode of the second body diode being connected to a second terminal of the second switching transistor.

[0074] Specifically, when both the first and second switching transistors are MOSFETs, the diode inside the MOSFET is called the body diode, also known as the parasitic diode. The formation of the body diode is closely related to the MOSFET structure. A MOSFET consists of a substrate (B), a source (S), and a drain (D). During manufacturing, the source is usually shorted to the substrate, resulting in a PN junction between the drain and the substrate, i.e., the body diode. Taking NMOS as an example, when the source is connected to a low potential, the body diode direction is drain → source (forward conduction); the opposite is true for PMOS. When the power supply voltage exceeds the MOSFET's withstand voltage, the body diode breaks down in reverse to discharge current, protecting the device from damage. In the MOSFET's off state, the body diode provides a path for reverse current, preventing abnormally high voltage in the circuit. The current carrying capacity of the body diode is related to the MOSFET's manufacturing process and typically does not exceed the maximum drain-source current.

[0075] By setting the first switching transistor to include a first body diode and the second switching transistor to include a second body diode, the first switching transistor can be reverse-biased and forward-biased to prevent current backflow, and the second switching transistor can be reverse-biased and forward-biased to prevent current backflow, thereby improving power supply safety and reliability.

[0076] Optionally, based on the above embodiments, see also... Figure 4 When the first switching component 41 includes at least two first switching transistors connected in series, the first terminal of the first first switching transistor is connected to the output terminal of the first power supply module 10, the second terminal of the first first switching transistor is connected to the second terminal of the second first switching transistor, the first terminal of the second first switching transistor is connected to the input terminal of the target component 200, and the control terminals of the first and second first switching transistors are both connected to the control module 30; and / or, when the second switching component 42 includes at least two second switching transistors connected in series, the first terminal of the first second switching transistor is connected to the output terminal of the second power supply module 20, the second terminal of the first second switching transistor is connected to the second terminal of the second second switching transistor, the first terminal of the second second switching transistor is connected to the input terminal of the target component 200, and the control terminals of the first and second second switching transistors are both connected to the control module 30.

[0077] Specifically, this configuration causes the switching transistors of the first switching component 41 and / or the second switching component 42 to form back-to-back MOSFETs. A back-to-back MOSFET refers to a structure formed by connecting two MOSFETs (usually NMOS and PMOS) back-to-back, achieving bidirectional current blocking function through the opposite direction of the body diodes.

[0078] Back-to-back MOSFETs can automatically switch on and off based on the voltage across their terminals. While a standard unidirectional MOSFET can meet the functional requirements, a large forward current flowing into the parasitic diode after the MOSFET is turned off can cause it to burn out. In special scenarios, such as sentry mode, if a short circuit or unexpected large current occurs in a device powered by the second power supply module 20 before the second switch 42 is turned on, it will trip the second power supply module 20. After the second power supply module 20 is tripped, its voltage drops below the battery's output voltage, and the battery will prioritize powering the second power supply module 20. The current output from the battery flows from the MOSFET to the short-circuit point or the unexpected large current device, causing the parasitic diode of the MOSFET to burn out.

[0079] Back-to-back MOSFETs can be forcibly turned on and off, or they can be automatically turned on / off based on the voltage across the circuit. In special mode scenarios, the back-to-back MOSFETs used in the first switching component 41 are in a voltage-dependent on / off state. When there is no unexpected high current, the voltage of the second power supply module 20 is higher than the battery voltage, and the voltage at the end of the back-to-back MOSFET connected to the first power supply module 10 and the battery is lower than the voltage at the end of the back-to-back MOSFET connected to the first node. The back-to-back MOSFETs used in the first switching component 41 are automatically disconnected, and the second power supply module 20 supplies power to the target component 200 through the second switching component 42.

[0080] If the unexpected large current pulls down the voltage of the second power supply module 20, causing the voltage at the end of the back-to-back MOSFET used in the first switching component 41 that is connected to the first power supply module 10 and the battery to be higher than the voltage at the end of the back-to-back MOSFET that is connected to the first node, then the back-to-back MOSFET used in the first switching component 41 will automatically close, and the battery will provide supplemental power.

[0081] By employing back-to-back MOSFETs with monitorable voltage in the first switching component 41 and / or the second switching component 42, unexpected high current can be used to prevent the MOSFETs from burning out, and battery power can be switched on when unexpected high current occurs, preventing the second power supply module 20, i.e., the second DC-DC converter, from being overloaded. After the unexpected high current disappears, power to the second DC-DC converter can be restored based on its voltage level, achieving flexible power supply and making the power supply circuit robust.

[0082] Optionally, based on the above embodiments, see also... Figure 4The first power supply branch 50 includes a first diode, the anode of which is connected to the output terminal of the first power supply module 10, and the cathode of which is connected to the power supply terminal of the control module 30. The first power supply module 10 is used to supply power to the control module 30 through the first diode; and / or, the second power supply branch 60 includes a second diode, the anode of which is connected to the output terminal of the second power supply module 20, and the cathode of which is connected to the power supply terminal of the control module 30. The second power supply module 20 is used to supply power to the control module 30 through the second diode.

[0083] Specifically, the first and second diodes function as unidirectional conductors. Under different operating conditions, this ensures the competing power supply to the control module 30, improving the reliability and safety of the vehicle's power supply.

[0084] Optionally, the switch module 40 further includes: at least one load switch 700, a first end of a first switch component 41 connected to a first power supply module 10, a first end of a second switch component 42 connected to a second power supply module 20, a second end of the first switch component 41 and the second end of the second switch component 42 connected to a first node N1, the load switch 700 connected between the first node and the target component 200, and the control end of the load switch 700 connected to the control module 30.

[0085] Specifically, load switch 700 is connected between target component 200 and the first node. When load switch 700 is on, target component 200 is connected to the first node. When load switch 700 is off, target component 200 is disconnected from both the first power supply module 10 and the second power supply module 20.

[0086] Optionally, the target component 200 includes at least one functional load element 211, and the load switch 700 includes at least one fourth switch tube 70; the first terminal of the fourth switch tube 70 is connected to the first node, the second terminal of the fourth switch tube 70 is connected to the functional load element, and the control terminal of the fourth switch tube 70 is connected to the control module 30. Optionally, the fourth switch tube 70 can be configured to correspond one-to-one with the functional load element.

[0087] Specifically, the third operating condition refers to a scenario where there is a power supply demand, and the first power supply module 10 is powered off. In the third operating condition, the control module 30 can control the fourth switch 70 to conduct, enabling the functional load element to connect to the first node. This allows the second power supply module 20 to supply power to the functional load element through the conducted second switch component 42 and the conducted fourth switch 70. Examples include power supply scenarios in sentinel mode or power supply scenarios where the refrigerator has a delayed power-off.

[0088] Since functional load components consume some of the electrical energy of the second power supply module 20, in a second operating condition, such as a collision scenario, if the first power supply module 10 fails and the second power supply module 20 needs to urgently supply power to the safety load component 212, the control module 30 can first control the fourth switch 70 to disconnect, so that the functional load components do not consume the electrical energy of the second power supply module 20. This allows the second power supply module 20 to have sufficient power to supply power to the safety load component 212, improving the reliability of power supply to safety load components such as door handle motors and child lock motors in scenarios such as collisions, abnormal power outages or malfunctions of the first power supply module 10, etc. It also reduces the power consumption of safety load components, providing a new approach to improving vehicle power supply safety.

[0089] Optionally, the control module 30 includes: an MCU (Microcontroller Unit), the power supply terminal of which is connected to the first power supply module 10 through the first power supply branch 50 of the power supply circuit, and to the second power supply module 20 through the second power supply branch 60 of the power supply circuit; the control terminal of the MCU is connected to the control terminal of the first switching component 41 and the control terminal of the second switching component 42 of the switching module 40. Optionally, when the power supply circuit includes a load switch, the control terminal of the MCU can be connected to the control terminal of the load switch 700.

[0090] Specifically, an MCU is a highly integrated embedded chip. An MCU may include a processor core (CPU), a core unit for executing instructions, memory, timers and PWM, and input / output interfaces (I / O). Because MCUs provide precise timing control, have high integration, and are characterized by low power consumption.

[0091] The control module 30 includes an MCU, which can independently control the switch module 40 and the load switch 700, and interact with the vehicle's overall controller. This allows for timely acquisition of the vehicle's operating conditions, improving control accuracy and, consequently, the reliability of the power supply circuit control.

[0092] Optionally, based on the above embodiments, see also... Figure 4 The power supply circuit also includes a battery 11, which is connected in parallel with the first power supply module 10. The battery 11 is used to supply power to the target component 200 through the first switching component 41 of the switching module 40, and / or to the control module 30 through the first power supply branch 50 of the power supply circuit. The voltage of the second power supply module 20 is greater than the full-charge voltage of the battery 11, and / or the voltage of the second power supply module 20 is adjustable. The first power supply module 10 includes a first DC-DC converter, and the second power supply module 20 includes a second DC-DC converter. The power consumption of the second DC-DC converter is less than that of the first power supply module 10.

[0093] Specifically, this configuration makes the battery 11 and the second power supply module 20 redundant. By making the voltage of the second power supply module 20 adjustable, the power supply requirements of the second power supply module 20 can be better met for different vehicle models and operating conditions.

[0094] The voltage of the second power supply module 20 is set to be greater than the full-charge voltage of the battery 11. This allows the second power supply module 20, which has lower power consumption, to prioritize powering functional load components in the third operating condition, such as a mode where there is no functional requirement for high-voltage devices, including sentinel mode, refrigerator delayed power-off mode, etc. This reduces the energy consumption of the battery 11, improves the battery 11's lifespan, and further enhances the reliability of power supply to safety load components.

[0095] For example, battery 11 may include a lithium-ion battery, lead-acid battery, nickel-metal hydride battery, or solid-state battery. For instance, battery 11 may include a 12V lithium battery. Under normal circumstances, the output voltage of the first DC-DC converter is higher than the output voltage of battery 11. In a first operating condition, such as normal driving, the first DC-DC converter supplies power to the control module and supplies power to the target component 200 through the switching module. Battery 11 serves as a backup power source. When the output voltage of the first DC-DC converter is lower than the output voltage of battery 11, battery 11 supplies power to the control module and supplies power to the target component 200 through the switching module, ensuring power supply reliability.

[0096] Optional, continue to combine Figures 2 to 4The power supply circuit includes two control modules 30 and two switch modules 40. The target component 200 includes a first target component 201 and a second target component 202. The first target component 201 may include a safety load element 212R and a functional load element 211R of the first target component. The second target component 202 may include a safety load element 212L of the second target component. The two control modules 30 include a first control module 31R and a second control module 31L. The two switch modules 40 include a first switch module 401R and a second switch module 402L. The first switch module 401R is connected between the first power supply module 10 and the first target component 201, and between the second power supply module 20 and the first target component 201. The first control module 31R is connected to the control terminal of the first switch module 401R. The first control module 31R is used to control the first switch module 401R to select the first power supply module 10 and / or the second power supply module 20 to supply power to the first target component 201. The second switch module 402L is connected between the first power supply module 10 and the second target component 202, and between the second power supply module 20 and the second target component 202. The second control module 31L is connected to the control terminal of the second switch module 402L. The second control module 31L is used to control the second switch module 402L to select the first power supply module 10 and / or the second power supply module 20 to supply power to the second target component 202.

[0097] Specifically, in practical applications of vehicles, safety load elements are generally divided into left-side and right-side safety load elements. Examples include left-side door handle motors and right-side door handle motors.

[0098] The power supply circuit is configured with two sets, allowing for redundancy between the two control modules and improving control reliability. The two switching modules are controlled by their respective control modules to supply power to the corresponding first target component 201 and second target component 202 via the first power supply module 10 or the second power supply module 20, depending on the vehicle's operating conditions.

[0099] Optionally, the first switch component 41R of the first switch module has the same structure as the first switch component 41L of the second switch module 402L, and the second switch component 42R of the first switch module has the same structure as the second switch component 42L of the second switch module 402L; the first power supply branch 50 of the first switch module 401R has the same structure as the first power supply branch 50 of the second switch module 402L; the second power supply branch 60 of the first switch module 401R has the same structure as the second power supply branch 60 of the second switch module 402L; the load switch 700 of the first switch module 401R includes at least one fourth switch tube 70; the first pole of the fourth switch tube 70 of the first switch module 401R is connected to the first node, the second pole of the fourth switch tube 70 of the first switch module 401R is connected to the functional load element of the first target component 201, and the control terminal of the fourth switch tube 70 of the first switch module 401R is connected to the first control module 31R; the fourth switch tube 70 of the first switch module 401R is configured in a one-to-one correspondence with the functional load element of the first target component 201.

[0100] Specifically, this configuration ensures that both the power supply circuits for the target components on the left and the target components on the right of the vehicle have low power consumption and high power supply safety and reliability.

[0101] The fourth switch 70 of the first switch module 401R is configured to correspond one-to-one with the functional load elements of the first target component 201. In the second operating condition, such as a collision scenario where real-time requirements are very high, the control module can control the first switch component 41 to disconnect, isolating other power supplies and most unrelated power supply networks of the vehicle, preventing other power supplies or power supply networks from failing to work due to short circuits, thereby isolating the second power supply module 20 from the short circuit point. The control module controls the fourth switch 70 to disconnect, causing the functional load elements of the first target component 201 to be de-energized, thus cutting off the functional load elements of the target component with high power consumption, ensuring that the second power supply module 20 has sufficient power in scenarios such as collision scenarios where power is required from the second power supply module 20. The control module controls the second switch component 42 to conduct, so as to energize the safety load element 212R of the first target component and control the energization of the safety load element 212L of the second target component, thereby ensuring the reliability of the power supply to the safety load elements 212R and 212L of the first target component in a collision scenario.

[0102] Optional, continue to combine Figures 2 to 4The target component may include at least one safety load element 212, and the load switch 700 includes at least one third switch tube 80; the first terminal of the third switch tube is connected to the first node, the second terminal of the third switch tube is connected to the safety load element 212, and the control terminal of the third switch tube is connected to the control module. The third switch tube and the safety load element 212 are configured in a one-to-one correspondence.

[0103] Specifically, a third switching transistor can be provided as needed, or it can be omitted. When it is necessary to control the conduction of the safety load element 212, the control module controls the third switching transistor to conduct. For example, the third switching transistor can be a FET.

[0104] (Field-Effect Transistor), without any limitation.

[0105] An alternative implementation method is described below. Figure 4 The control module 30 may include a first control module 31R, and the switch module 40 includes a first switch module 401R and a second switch module 402L. The target components include a first target component 201 and a second target component 202.

[0106] It should be noted that, Figure 4 The example diagram illustrates R representing the power supply circuit on the right side of the vehicle and L representing the power supply circuit on the left side of the vehicle. For example, Figure 4 In this context, 41R represents the first switching component of the first switching module. The structure of the first switching component 41R of the first switching module and its corresponding connection relationship are the same as the structure of the first switching component 41 of the switching module 40 proposed in the above embodiments, and have the same function and beneficial effects. Figure 4 In this context, 42R represents the second switching component of the first switching module. The structure and corresponding connection relationship of the second switching component 42R of the first switching module are the same as those of the second switching components of the switching modules proposed in the above embodiments, and have the same function and beneficial effects.

[0107] The control terminals of the first switch component 41R and the second switch component 42R of the first switch module are both electrically connected to the first control module 31R. The first end of the first switch component 41R of the first switch module is electrically connected to the first power supply module 10. The first end of the second switch component 42R of the first switch module is electrically connected to the second power supply module 20. The second ends of the first switch component 41R and the second switch component 42R of the first switch module are both electrically connected to the first target component 201.

[0108] In another optional implementation, the second switching component 42R of the first switching module can be a single switching transistor, such as a transistor, a single MOSFET, or a back-to-back MOSFET, etc., without any limitation. The first switching component 41R of the first switching module can also be a back-to-back MOSFET or a MOSFET that can automatically switch on and off according to the voltage difference between its two ends.

[0109] Specifically, when the vehicle is in the first operating condition, such as a normal driving scenario, the second switch component 42R of the first switch module is disconnected, and the first switch component 41R of the first switch module is connected. The second power supply module 20 has no output, and the first power supply module 10 supplies power to the first control module 31R and the first target component 201.

[0110] For example, the first control module 31R transmits level signals to the first switching component 41R and the second switching component 42R of the first switching module. For instance, transmitting a low-level signal to the second switching component 42R controls it to open, while transmitting a high-level signal to the first switching component 41R controls it to close. The first power supply module 10 supplies power to the first target component 201 through the closed first switching component 41R of the first switching module.

[0111] When the vehicle is in a second operating condition, such as a collision scenario, if the first power supply module 10 experiences an abnormal power outage or a malfunction and loses power, the second power supply module 20 supplies power to the first control module 31R. The first control module 31R sequentially controls the first switch component 41R of the first switch module to open, the functional load element 211R in the first target component 201 (e.g., a refrigerator) to lose power, and the second switch component 42R of the first switch module to close. The second power supply module 20 then supplies power to the safety load element 212R in the first target component 201 (e.g., the right door lock) through the closed second switch component 42R of the first switch module.

[0112] When the vehicle is in a third operating condition, such as a special mode scenario where there is no functional requirement for high-voltage devices, the first control module 31R controls the first switching component 41R of the first switching module to open and the second switching component 42R of the first switching module to open. In this third operating condition, the second power supply module 20 can be a low-cost, non-adjustable DC-DC converter, allowing the current from the second power supply module 20 to flow through the second switching component 42R of the first switching module to the functional load component 211R in the first target component 201, such as sentry mode related components and the refrigerator component. By controlling the opening of the first switching component 41R of the first switching module, the current from the second power supply module 20 to the battery 11 connected in parallel with the first power supply module 10 is prevented, thus avoiding damage to the battery 11 due to excessive voltage from the second power supply module 20.

[0113] In another optional implementation, when the voltage of the second power supply module 20 is adjustable, in the third operating condition, the first control module 31R can control both the first switch component 41R and the second switch component 42R of the first switch module to be turned on, so that the second power supply module 20 is connected to the vehicle's low-voltage power grid, i.e., the secondary power distribution, to supply power to all components of the vehicle. Since the second power supply module 20 supplies power to the vehicle's low-voltage power grid, it needs to be compatible with the voltage of the battery 11, thus requiring the voltage of the second power supply module 20 to be adjustable. Because the power consumption of the second power supply module 20 is lower than that of the first power supply module 10, compared to the first power supply module 10 supplying power to the first target component 201, the second power supply module 200 supplies power to the first target component 201, which reduces power consumption.

[0114] It should be noted that, Figure 4 The example diagram illustrates R representing the power supply circuit on the right side of the vehicle and L representing the power supply circuit on the left side of the vehicle. For example, Figure 4 In this context, 41L represents the first switching component of the second switching module. The structure of the first switching component 41L of the second switching module and its corresponding connection relationship are the same as the structure of the first switching component 41 of the switching module 40 proposed in the above embodiments, and have the same function and beneficial effects. Figure 4 In this context, 42L represents the second switching component of the second switching module. The structure of the second switching component 42L of the second switching module and its corresponding connection relationship are the same as the structure of the second switching component 42 of the switching module 40 proposed in the above embodiments, and have the same function and beneficial effects.

[0115] Continue to refer to Figure 3 and Figure 4 Optionally, control module 30 includes a second control module 32L. Switch module 40 includes a second switch module 402L. Target component 200 includes a second target component 202. The control terminals of the first switch component 41L and the second switch component 42L of the second switch module are both electrically connected to the second control module 32L. The first terminal of the first switch component 41L of the second switch module is electrically connected to the first power supply module 10, the first terminal of the second switch component 42L of the second switch module is electrically connected to the second power supply module 20, and the second terminals of both the first switch component 41L and the second switch component 42L of the second switch module are both electrically connected to the second target component 202.

[0116] In one optional implementation, the second switching component 42L of the second switching module can be a back-to-back MOSFET. The first switching component 41L of the second switching module can also be a back-to-back MOSFET or a MOSFET that can automatically switch on and off based on the voltage difference between its terminals. Using MOSFETs in the switching module reduces the circuit size.

[0117] When the vehicle is in its first operating condition, such as a normal driving scenario, the first power supply module 10 supplies power to the second control module 32L. The second control module 32L controls the second switch component 42L of the second switch module to disconnect and controls the first switch component 41L of the second switch module to turn on. In this normal driving scenario, the second power supply module 20 has no power output. The first power supply module 10 supplies power to the second target component 202 through the first switch component 41L of the second switch module.

[0118] When the vehicle is in a second operating condition, such as a collision scenario, if the first power supply module 10 experiences an abnormal power outage or a malfunction, the second power supply module 20 supplies power to the second control module 32L. The second control module 32L then controls the first switch component 41L of the second switch module to open and the second switch component 42L of the second switch module to close. The second power supply module 20 then supplies power to the safety load element 212L in the second target component 202, such as the left door lock, through the closed second switch component 42L of the second switch module.

[0119] When the vehicle is in the third operating condition, such as a special mode scenario, the first switch component 41L of the second switch module is disconnected and the second switch component 42L of the second switch module is turned on by the second control module 32L. The second target component 202 is powered by the second power supply module 20, which can reduce power consumption compared to being powered by the first power supply module 10.

[0120] Optionally, when the vehicle is in the first operating condition, such as a normal driving scenario, both the second switch component 42R and the second switch component 42L of the first switch module are disconnected. Both the first switch component 41R and the first switch component 41L of the first switch module are connected. The connection of the first switch component 41R and the first switch component 41L ensures that the first target component 201 and the second target component 202 are normally powered by the first power supply module 10. The purpose of disconnecting the second switch component 42R and the second switch component 42L of the first switch module is to prevent the current output by the second power supply module 20 from flowing into the primary power distribution short circuit point through the first switch component 41R and the first switch component 41L of the first switch module when the first switch component 41R is connected and the first switch component 41L is not disconnected during the moment the second power supply module 20 supplies power after a vehicle collision, thus causing the voltage output of the second power supply module 20 to fail. This effectively isolates the second power supply module 20 from the primary power distribution network where the first power supply module 10 is located, improving the power supply reliability of the second power supply module 20.

[0121] Optionally, one of the first target component 201 and the second target component 202 may include a functional load element.

[0122] For example, see [link to previous article] Figure 4 The first target component 201 may include a functional load element 211R, such as a refrigerator component A5 or a component A6 corresponding to the vehicle's sentry mode. The first target component 201 may also include a safety load element 212R, such as at least one of the vehicle's right rear door handle motor A1, right rear door child lock motor A2, right rear door controller A3, and right front door controller A4. The second target component 202 may include a safety load element 212L, such as at least one of the vehicle's left rear door handle motor B1, left rear door child lock motor B2, left rear door controller B3, and left front door controller B4.

[0123] An alternative implementation method continues to combine Figures 2 to 4 In target component 200, each safety load element 212 can be electrically connected to the switching module 40 via its corresponding third switch 80, such as a MOSFET. The on / off state of each third switch is controlled by its corresponding control module 30. Taking a door handle motor as an example, if the door handle motor is directly connected to the corresponding third switch, the control module 30 controls the third switch to be on when the door handle motor needs to work. When the door handle motor does not need to work, the control module controls the third switch to be off. If the door handle motor is connected to the corresponding third switch through a motor controller, the third switch needs to be always on to ensure power supply to the motor controller.

[0124] It should be noted that, Figure 2 and Figure 4 The example shown in the diagram indicates that the load switch 700 includes a third switching tube connected to the safety load element 212R of the first target component 201. Figure 2 and Figure 4 The example shown in the diagram indicates that the load switch 700 includes a third switching tube connected to the safety load element 212L of the second target component 202, without any limitation herein.

[0125] Another alternative implementation method is to continue combining... Figures 2 to 4 Each functional load element 211 in the target component 200 can be electrically connected to the corresponding switching module 40 via its corresponding fourth switch 70, such as a MOSFET. The on / off state of each fourth switch 70 is controlled by the corresponding control module 30. Taking a functional load element including a sentinel mode component as an example, if the sentinel mode component is directly connected to the corresponding fourth switch 70, the control module 30 controls the fourth switch 70 to turn on when the sentinel mode component needs to work. When the sentinel mode component does not need to work, the control module controls the fourth switch 70 to turn off.

[0126] It should be noted that in the second operating condition, such as a collision scenario, the first power supply module 10 fails and loses power due to an emergency such as a collision. At this time, it is necessary to urgently activate the safety load element 212, such as by opening a car door. The control module will first turn off the fourth switch 70 to disconnect the functional load element, thereby reducing the power consumption of the second power supply module 20. This allows the second power supply module 20 to provide sufficient power to the safety load element 212, improving vehicle safety and reducing vehicle power consumption. The functional load element can be located in either the left or right power supply circuit of the vehicle; no limitation is made here. Figure 4 The embodiments shown herein illustrate a case where the first target component 201 includes a functional load element 211R, without any limitation herein.

[0127] In one optional implementation, both the first DC-DC converter and the second DC-DC converter may have their own internal switching transistors. The switching transistors can control whether the corresponding DC-DC converter has an output. In addition, the first DC-DC converter is also used to power other drive components besides the switching module, such as other drive components C1 on the right and other drive components C2 on the left.

[0128] Continue to refer to Figure 4Optionally, the first power supply branch 50 of the right-side power supply circuit of the vehicle may include at least one first diode, and the second power supply branch 60 may also include at least one second diode. The first power supply branch 50 of the left-side power supply circuit of the vehicle may include at least one first diode, and the second power supply branch 60 may also include at least one second diode. Both the first and second diodes function as unidirectional conductors.

[0129] The first power supply module 10 and the second power supply module 20 compete for power supply through the first diode and the second diode of the first power supply branch 50 of the right-side power supply circuit of the vehicle, respectively, thereby improving the reliability of power supply from the right-side power supply circuit to the first target component 201. Similarly, the first power supply module 10 and the second power supply module 20 compete for power supply through the first diode and the second diode of the first power supply branch 50 of the left-side power supply circuit of the vehicle, thereby improving the reliability of power supply from the left-side power supply circuit to the first target component 201.

[0130] The power supply circuit provided in this embodiment controls the corresponding switching unit to operate through each control unit, so that the first power supply module 10 supplies power to the target component 200, and / or the second power supply module 20 supplies power to the target component 200. This enables different power supply modules to supply power to the target component 200 in different scenarios such as normal driving, collision, and special mode scenarios, thereby achieving switching of power supply modes corresponding to different scenarios. This satisfies collision redundancy unlocking and special mode power supply without affecting the power supply for normal vehicle operation. Furthermore, when the lower-power second power supply module 20 supplies power to the target component 200, the higher-power first power supply module 10 does not need to supply power to the target component 200, thus solving the problem of high energy consumption caused by the first power supply module 10 supplying power to the target component 200 while also supplying power to other loads in the vehicle, thereby reducing the power consumption of the power supply circuit.

[0131] Example 3

[0132] This utility model embodiment provides a control method for a power supply circuit. This power supply circuit control method is applied to the power supply circuit proposed in any of the above embodiments, and the power supply circuit control method includes:

[0133] Depending on the vehicle's operating conditions, the control switch module selects the first power supply module and / or the second power supply module to supply power to the target component.

[0134] Specifically, the vehicle's operating conditions can include at least one operating scenario, such as normal driving, collision, or special mode scenarios. The descriptions of each scenario correspond to the first, second, and third operating conditions in the power supply circuit described above. For example, the first operating condition can include a normal driving scenario. The second operating condition can include modes where the first power supply module needs to be powered off, such as collision scenarios. The third operating condition can include special mode scenarios that do not require high-voltage components, such as sentry mode or refrigerator delayed power-off mode.

[0135] The power supply circuit control method provided in this embodiment controls a control module to select a first power supply module and / or a second power supply module to supply power to the target component. Depending on the vehicle's operating scenario, in some scenarios, the control module selects the first power supply module to supply power to the target component. In other scenarios, the control module selects the second power supply module to supply power to the target component. In scenarios with high safety requirements, both the first and second power supply modules can be selected to supply power to the target component, forming a redundant power supply state, thereby improving the power supply reliability and flexibility of the target component.

[0136] When the first power supply module is a step-down circuit that converts the DC power output from the vehicle's high-voltage battery pack into a stable low-voltage DC power, it has a large load, supplying power to the entire vehicle's electrical circuits, resulting in high power consumption. By setting up a second power supply module, a DC-to-DC power supply circuit is added within the vehicle, separate from the first power supply module. When the second power supply module can provide sufficient power to the target component, there is no need for the first power supply module to supply power to the target component. Since the second power supply module can be configured to supply power only to a portion of the vehicle's electrical load, i.e., the target component, its voltage is lower than that of the first power supply module, sufficient to meet the power requirements of the target component. Consequently, the power consumption of the second power supply module is lower.

[0137] The power supply circuit control method provided in this embodiment facilitates flexible control of the power supply of the first power supply module and / or the second power supply module according to the vehicle's operating scenario. Since the target component is part of all load components in the vehicle, in some scenarios, it is unnecessary to activate the first power supply module, which supplies power to the entire vehicle, to supply power to the target component. This solves the problem of high energy consumption caused by the first power supply module supplying power to both the target component and the entire vehicle, thus reducing power consumption when the second power supply module supplies power to the target component after the first power supply module is powered down. Furthermore, the first and second power supply modules serve as backup power supplies for each other, improving the power supply reliability of the safety load components in the target component across various scenarios.

[0138] Optionally, based on the above embodiments, the power supply circuit control method provided in this embodiment, which controls the switching module to select the first power supply module and / or the second power supply module to supply power to the target component according to the vehicle's operating conditions, may include:

[0139] When the vehicle is operating in the first condition, the first switch component of the control switch module is turned on, so that the first power supply module supplies power to the target component. When the vehicle is operating in the second condition, the first switch component 41 of the control switch module is turned off, and the second switch component of the control switch module is turned on, so that the second power supply module supplies power to the target component; wherein, the power loss of the second power supply module is less than the power loss of the first power supply module.

[0140] Specifically, in the first operating condition, the control module controls the first switching component to conduct, enabling the first power supply module to supply power to the target component. Since the first operating condition represents a normal vehicle driving scenario, the first power supply module is powered on, facilitating its supply of power to the target component. In the second operating condition, the control module controls the second switching component to conduct, enabling the second power supply module to supply power to the target component. Because in the second operating condition, the first power supply module experiences an abnormal power outage or malfunction, the control module, with its lower power consumption, supplies power to the target component. This ensures the reliability of the power supply to the target component while effectively reducing the vehicle's power consumption.

[0141] Optionally, the power supply circuit control method provided in this embodiment, which controls the switching module to select the first power supply module and / or the second power supply module to supply power to the target component according to the vehicle's operating conditions, may include:

[0142] When the vehicle is operating in the first condition, the first switch component 41 of the control switch module is turned on, and the second switch component of the control switch module is turned off, so that the first power supply module supplies power to the safety load element of the target component; the first condition includes the normal driving mode of the vehicle. When the vehicle is operating in the second condition, the first switch component of the control switch module is turned off, and the second switch component of the control switch module is turned on, so that the second power supply module supplies power to the safety load element; wherein, the second condition includes a first power supply module failure mode, and / or a mode in which both the first power supply module and the battery fail.

[0143] Specifically, when the vehicle is operating in the first condition, i.e., the normal driving mode, the first power supply module is powered on normally. At this time, the second power supply module does not need to be powered on, and the second switch component of the control switch module is disconnected. The first switch component 41 of the control switch module is turned on, so that the first power supply module supplies power to the safety load element of the target component, thereby improving the power supply safety of the vehicle.

[0144] In the second operating scenario, such as a collision, the vehicle's primary power supply module fails and loses power. Alternatively, for vehicle safety in an emergency, the primary power supply module loses power, controlling the primary switch to disconnect, thus isolating potential risks such as short circuits caused by a collision. In this second operating scenario, the secondary power supply module needs to urgently supply power to the safety load components, and the control module controls the secondary switch to conduct. The secondary power supply module then supplies power to the target component's safety load components through the conductive secondary switch. This configuration, using a lower-power secondary power supply module, reduces the power consumption of the safety load components and improves the reliability of power supply to safety load components such as door handle motors and child lock motors in scenarios such as collisions, abnormal power outages or malfunctions of the primary power supply module, etc.

[0145] Optionally, based on the above embodiments, the power supply circuit used in the power supply circuit control method provided in this embodiment may specifically include: a target component including a first target component and a second target component; a switch module including a first switch module and a second switch module, the first switch module being connected to the first target component and the second switch module being connected to the second target component; the first target component including a safety load element and a functional load element; the second target component including a safety load element; and the first switch module including a load switch, the fourth switching transistor of the load switch being connected to the functional load element.

[0146] The power supply circuit control method provided in this embodiment, which controls the switching module to select the first power supply module and / or the second power supply module to supply power to the target component according to the vehicle operating conditions, may include:

[0147] When the vehicle is operating in the first operating condition, the first switch component and the fourth switch tube of the first switch module are turned on, and the second switch component of the first switch module is turned off, so that the first power supply module supplies power to the functional load element and the safety load element of the first target component; and the first switch component of the second switch module is turned on, and the second switch component of the second switch module is turned off, so that the first power supply module supplies power to the safety load element of the second target component.

[0148] Specifically, the fourth switching transistor is connected to a functional load element, such as a refrigerator assembly. The first target component includes a functional load element. The first switching module and the first control module are respectively connected to the fourth switching transistor. In the first operating condition, since the vehicle is in normal operation, the first power supply module is powered on. The control module can control the second switching component of the first switching module to disconnect, so that the second power supply module does not need to output power. The control module controls both the first switching component and the fourth switching transistor of the first switching module to conduct, so that the first power supply module supplies power to both the functional load element and the safety load element of the first target component. Since the second target component only includes a safety load element, in the first operating condition, the first power supply module is powered on, and the control module controls the second switching component of the second switching module to disconnect, so that the second power supply module does not need to supply power to the second target component. The control module also controls the first switching component of the second switching module to conduct, so that the first power supply module reliably supplies power to the safety load element of the second target component.

[0149] Optionally, based on the above embodiments, the power supply circuit control method provided in this embodiment, which controls the switching module to select the first power supply module and / or the second power supply module to supply power to the target component according to the vehicle's operating conditions, may include:

[0150] When the vehicle is operating in the second condition, the first switch component and the fourth switch tube of the first switch module are disconnected, and the second switch component of the first switch module is turned on to disconnect the functional load element, so that the second power supply module supplies power to the safety load element of the first target component; and the first switch component of the second switch module is disconnected, and the second switch component of the second switch module is turned on, so that the second power supply module supplies power to the safety load element of the second target component.

[0151] Specifically, since functional load components consume some of the power from the second power supply module, in the second operating condition, such as a collision scenario, the first power supply module is de-energized for vehicle safety in an emergency. During the second operating condition, the control module controls the first switching component to disconnect, facilitating the isolation of potential short-circuit risks from a collision or other scenario affecting the first power supply module.

[0152] In the second operating condition, the second power supply module needs to urgently supply power to the safety load element. In order to ensure that the output power of the second power supply module is sufficient to drive the safety load elements of the first target component and the second target component, the control module can first control the fourth switch to disconnect, so that the functional load element of the first target component is cut off, so that the functional load element does not consume the power of the second power supply module, and the second power supply module has enough power to supply power to the safety load element.

[0153] Then, the control module controls the second switching components of both the first and second switching modules to be turned on, so that the second power supply module supplies power only to the safety load elements of the first and second target components. This configuration improves the reliability of power supply to safety load components such as door handle motors and child lock motors in scenarios such as collisions, abnormal power outages or malfunctions of the first power supply module, and also reduces the power consumption of the safety load components.

[0154] Optionally, the power supply circuit control method provided in this embodiment, which controls the switching module to select the first power supply module and / or the second power supply module to supply power to the target component according to the vehicle's operating conditions, may include:

[0155] When the vehicle is operating in the third operating condition and the voltage of the second power supply module is not adjustable, the first switch component of the first switch module is disconnected, and the second switch component and the fourth switch tube of the first switch module are turned on, so that the second power supply module supplies power to the functional load element of the first target component; the second switch component of the second switch module is disconnected, and the first switch component of the second switch module is turned on, so that the battery supplies power to the safety load element of the second target component; wherein, the third operating condition includes the functional demand power consumption mode and the first power supply module power-off mode.

[0156] Specifically, the third operating mode is a power consumption mode with functional requirements but no need for high-voltage components. For example, after the first power supply module is powered down, it is necessary to activate the sentry mode, or to delay the power-down of the refrigerator components.

[0157] When the voltage of the second power supply module is not adjustable, i.e., the maximum output voltage of the second power supply module is a fixed value, the first power supply module is powered down under the third operating condition. The control module can control the first switching component of the first switching module to disconnect. Power from the second power supply module cannot flow into the first power supply module through the first switching component of the first switching module, thus isolating the first and second power supply modules and the battery from each other. This prevents the battery from being damaged by excessively high voltage in the second power supply module and also prevents the battery from discharging into the second power supply module when the voltage is too low, affecting battery life. The control module controls the second switching component of the first switching module to conduct, energizing the first node of the first switching module, allowing the safety load component of the first target component to be powered by the second power supply module. The control module controls the fourth switching transistor to conduct, allowing the second power supply module to supply power to the functional load component of the first target component through the conducting first switching component of the first switching module and the conducting fourth switching transistor.

[0158] Since the second switching component of the second switching module is connected in parallel with the second switching component of the first switching module, in order to maintain a high power supply of the second power supply module to meet the power supply requirements of the functional load component of the first target component, the second switching component of the second switching module is controlled to be disconnected. Because the power consumption of the safety load component of the second target component is very low, the battery is sufficient to meet its power supply requirements. Since the battery is connected in parallel with the first power supply module, the control module controls the first switching component of the second switching module to be turned on, so that the battery supplies power to the safety load component of the second target component through the turned-on second switching component of the second switching module.

[0159] Optionally, the power supply circuit control method provided in this embodiment, which controls the switching module to select the first power supply module and / or the second power supply module to supply power to the target component according to the vehicle's operating conditions, may include:

[0160] When the vehicle is operating in the third operating condition and the voltage of the second power supply module is adjustable, the first switch component, the second switch component, and the fourth switch tube of the first switch module are all turned on, so that the second power supply module supplies power to the functional load element and safety load element of the first target component and charges the battery; wherein, the output voltage of the second power supply module is higher than the full charge voltage of the battery; and the second switch component of the second switch module is turned off, and the first switch component of the second switch module is turned on, so that the second power supply module supplies power to the safety load element of the second target component through the turned-on first switch component and second switch component of the first switch module, and the turned-on first switch component of the second switch module.

[0161] Specifically, when the voltage of the second power supply module is adjustable, its maximum output voltage can be adjusted according to the battery voltage. The maximum output voltage of the second power supply module can be adjusted to be slightly higher than the battery's full-charge voltage. This configuration ensures that, although the second power supply module and battery are connected in parallel when the first switch of the first control module is open and the second switch of the first switch module is closed, the second power supply module supplies power to the safety load component of the first target component through the closed second switch of the first switch module. The second power supply module also supplies power to the functional load element of the first target component through the closed first switch of the first control module and the closed fourth switch.

[0162] With this configuration, the second power supply module will neither damage the battery nor allow the battery to supply power to the second power supply module. Since the first power supply module is already powered off in the third operating condition, and the maximum output voltage of the second power supply module is slightly higher than the battery's full-charge voltage, the first switching component of the first switching module can be turned on via the control module, and the battery will not supply power to the first target component.

[0163] The first terminal of the second switch component of the second switch module is connected in parallel to the first terminal of the second switch component of the first switch module and is connected to the output terminal of the second power supply module. The first terminal of the first switch component of the second switch module is connected in parallel to the first terminal of the first switch component of the first switch module and the first terminal of the battery and is connected to the output terminal of the first power supply module.

[0164] In the third operating condition, both the first and second switching components of the first switching module are turned on. The control module can control the second switching component of the second switching module to turn off and the first switching component of the second switching module to turn on. With this configuration, the second power supply module can supply power to the safety load element of the second target component through the turned-on first switching component of the first switching module and the turned-on first switching component of the second switching module. When the battery voltage is low, the second power supply module can also charge the battery.

[0165] It should be noted that when switching from the third operating condition to the second operating condition, the functional load components will consume some of the power from the second power supply module. In the second operating condition, such as in a collision scenario, the first power supply module may fail or actively shut down, preventing it from supplying power to the target component. The control module controls the first switching component of the first switching module to disconnect, facilitating the isolation of potential short circuits or other risks caused by collisions. If the second power supply module urgently needs to supply power to the safety load components, the control module can first control the fourth switching transistor to disconnect, ensuring that the functional load components do not consume power from the second power supply module, allowing the second power supply module to have sufficient power to supply the safety load components. The control module controls the first switching component of the first switching module to supply power to the safety load components of the first target component. The control module controls the first switching component of the second switching module to remain on and controls the second switching component of the second switching module to remain off, allowing the battery to supply power to the safety load components of the second target component.

[0166] The power supply circuit control method provided in this embodiment reduces the vehicle's power consumption by controlling the power supply under different operating conditions. It improves the power supply reliability of safety load components such as door handle motors and child lock motors in scenarios such as collisions, abnormal power outages or malfunctions of the first power supply module, etc., ensuring the robustness of door handle unlocking by touch and the reliability of door handle ejection, thereby improving the vehicle's power supply safety.

[0167] Optionally, the power supply circuit control method provided in this embodiment may further include, before the second switching component of the control switch module is turned on:

[0168] The first switch component of the switch module is disconnected sequentially by the control line, and all load switches 700 of the switch module are also disconnected.

[0169] Specifically, the control line can be a cable capable of transmitting control signals. Before the second switch component of the control switch module is turned on, the first switch component of the control switch module is turned off in sequence. This ensures that when the second power supply module, which has a lower maximum output power, supplies power to the target component through the turned-on second switch component, it is not affected by short circuits in the first power supply module or the power distribution system and is not pulled down.

[0170] Before the second switch component of the control switch module is turned on, each load switch 700 of the control switch module is turned off in sequence. This ensures that when the second power supply module with a lower maximum output power supplies power to the target component through the turned-on second switch component, it is not affected by the large load of the target component and other secondary power distribution components and is not pulled down.

[0171] Another optional implementation method is applicable to controlling the power supply circuit of any embodiment of the present invention. The power supply circuit is the power supply circuit of a vehicle, and the specific structure of the power supply circuit can be found in [reference needed]. Figures 1-4 The control method for this power supply circuit may include:

[0172] The control switch module is activated according to the instruction, causing the first power supply module to supply power to the target component, and / or causing the second power supply module to supply power to the target component, specifically including:

[0173] Step 1: When the instruction is that the vehicle is in the first type of scenario, the second switch component of the first switch module is disconnected, the second switch component of the second switch module is disconnected, the first switch component of the first switch module is turned on, and the first switch component of the second switch module is turned on.

[0174] In this context, both the first target component and the second target component in the target assembly can be powered by the first power supply module.

[0175] Step 2: When the instruction is that the vehicle is in the second type of scenario, the first switch component of the first switch module is turned off, the functional load element in the first target component is de-energized, and the second switch component of the first switch module is turned on in sequence. The first switch component of the second switch module is turned off, and the second switch component of the second switch module is turned on.

[0176] The safety load element in the first target component and the second target component can both be powered by the second power supply module.

[0177] Step 3: When the instruction is that the vehicle is in the third type of scenario, control the first switch component of the first switch module to be disconnected, the second switch component of the second switch module to be disconnected, the second switch component of the first switch module to be turned on, and the first switch component of the second switch module to be turned on; or, control the second switch component of the second switch module to be disconnected, and the first switch component of the first switch module, the second switch component of the first switch module, and the first switch component of the second switch module to be turned on.

[0178] For example, in the first operating condition, the instructions for the first type of scenario are those for a normal driving scenario. In the second operating condition, the instructions for the second type of scenario are those for a collision scenario. In the third operating condition, the instructions for the third type of scenario are those for a special mode scenario.

[0179] When the command indicates the vehicle is in a normal driving scenario, the control module controls the state of the switch module, causing the circuit connecting the first power supply module and the target component to be conductive, while the circuit connecting the second power supply module and the target component to be disconnected, allowing the first power supply module to supply power to the target component. When the command indicates the vehicle is in a collision scenario, the control module controls the state of the switch module, causing the circuit connecting the first power supply module and the target component to be disconnected, while the circuit connecting the second power supply module and the target component to be conductive, allowing the second power supply module to supply power to the target component. When the command indicates the vehicle is in a special mode scenario, the control module controls the state of the switch module, causing the first power supply module to supply power to the target component, and / or the second power supply module to supply power to the target component.

[0180] Another alternative implementation method, see below. Figure 4 The first control module 31R transmits level signals to the first switching component 41R and the second switching component 42R of the first switching module. For example, when a low-level signal is transmitted to the second switching component 42R, the second switching component 42R is turned off. When a high-level signal is transmitted to the first switching component 41R, the first switching component 41R is turned on, and the first power supply module 10 supplies power to the first target component 201 through the first switching component 41R.

[0181] The second control module 32L transmits level signals to the first switch component 41L of the second switch module and the second switch component 42L of the second switch module, such as transmitting a low-level signal to the second switch component 42L of the second switch module. This controls the second switch component 42L of the second switch module to open, transmits a high-level signal to the first switch component 41L of the second switch module, and controls the first switch component 41L of the second switch module to turn on. The first power supply module then supplies power to the second target component 202 through the first switch component 41L of the second switch module.

[0182] Under normal driving conditions, the first switch component 41R of the first switch module and the first switch component 41L of the second switch module are both conducting, ensuring that the first target component 201 and the second target component 202 are normally powered by the first power supply module 10. The purpose of disconnecting the second switch component 42R of the first switch module and the second switch component 42L of the second switch module is to prevent the current output by the second power supply module 20 from failing to flow into the primary power distribution short circuit point during the moment the second power supply module 20 is powered on after a vehicle collision, when the first switch component 41R of the first switch module is conducting and the first switch component 41L of the second switch module is not disconnected.

[0183] When the command indicates a collision scenario, the vehicle's battery control system detects the voltage output of the first power supply module 10. If the voltage output of the first power supply module 10 is normal, it can supply power to the safety load component of the target component and perform unlocking. If the voltage output of the first power supply module 10 fails or is undervoltage, it controls the output voltage of the second power supply module 20. The second power supply module supplies power to the first control module 31R and the second control module 32L. When the power supply to the first control module 31R and the second control module 32L is stable, the first control module 31R controls the first switch component 41R of the first switch module and the first switch component 41L of the second switch module to disconnect, and the second switch component 42R of the first switch module and the second switch component 42L of the second switch module to connect. The second power supply module 20 supplies power to the first target component through the connected second switch component 42R of the first switch module, and supplies power to the second target component through the connected second switch component 42L of the second switch module, to ensure that all door locks of the vehicle unlock and door handles pop out when the vehicle is in a collision scenario.

[0184] In one optional implementation, the first control module 31R controls the first switch component 41R of the first switch module to disconnect. After the second control module 32R controls the first switch component 41L of the second switch module to disconnect, it controls the third switch tube 80R connected to the safety load element 212R of the first target component 201 to disconnect, and controls the fourth switch tube 70 connected to the functional load element 211R of the first target component 201 to disconnect. It also controls the third switch tube 80L connected to the safety load element 212L of the second target component 202 to disconnect.

[0185] Then, the first control module 31R controls both the first switch component 41R and the fourth switch tube 70 of the first switch module to be disconnected, and controls the second switch component 42R of the first switch module to be turned on. The second control module 32R controls the first switch component 41L of the second switch module to be disconnected, and controls the second switch component 42L of the second switch module to be turned on. This configuration ensures that the voltage transmitted by the second power supply module 20, after being output through the turned-on second switch components 42R and 42L of the first switch module, will not be affected by short circuits in the primary power distribution or large loads in the secondary power distribution.

[0186] In one alternative implementation, a special mode refers to a mode that does not require the functionality of high-voltage devices, such as sentinel mode, where the refrigerator delays power-off.

[0187] When the vehicle is in a special mode scenario, if the second power supply module 20 has a non-adjustable voltage, the first control module 31R controls the first switch component 41R of the first switch module to open and the second switch component 42R of the first switch module to open. This allows the current from the second power supply module 20 to flow through the open second switch component 42R of the first switch module to the functional load component 211R in the first target component 201, such as sentry mode related components and the refrigerator component. By controlling the opening of the first switch component 41R of the first switch module, the current from the second power supply module 20 is prevented from flowing to the battery 11 connected in parallel with the first power supply module 10, thus preventing damage to the battery 11 due to excessive voltage from the second power supply module 20.

[0188] In special mode scenarios, if the second power supply module 20 is a voltage-adjustable power supply module, the first control module controls both the first switch component 41R and the second switch component 42R of the first switch module to be turned on. This connects the second power supply module 20 to the vehicle's low-voltage power grid (secondary power distribution), enabling it to supply power to all vehicle components. Since the second power supply module 20 can supply power to the vehicle's low-voltage power grid, it needs to be compatible with the voltage of the battery 11, thus requiring voltage adjustment. In special mode scenarios, for the second target component 202 which has no functional requirements, the second switch module 32L controls the second switch component 42L to be turned off while keeping the first switch component 41L of the second switch module on. This allows the second control module 32L and the second target component to be powered by the second power supply module 20 through the on-state second switch component 42R, the on-state first switch component 41R, and the on-state first switch component 41L of the second switch module.

[0189] This embodiment also provides a vehicle, including a power supply circuit as described in any embodiment of the present invention, or a control method for the power supply circuit proposed in any of the above embodiments.

[0190] The control method and vehicle of the power supply circuit provided in this embodiment belong to the same inventive concept as the power supply circuit provided in any embodiment of this utility model, and have corresponding beneficial effects. For technical details not detailed in this embodiment, please refer to the power supply circuit provided in any embodiment of this utility model.

[0191] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A power supply circuit, characterized by comprising: include: The system comprises a first power supply module, a second power supply module, at least one control module, and at least one switch module. The switch module is connected between the first power supply module and the target component, and between the second power supply module and the target component; the control module is connected to the control terminal of the switch module. The control module is used to control the switching module to select the first power supply module and / or the second power supply module to supply power to the target component.

2. The power supply circuit of claim 1, wherein, The switching module includes: A first switching component is connected between the first power supply module and the target component, and the control terminal of the first switching component is connected to the control module; the control module is used to control the first switching component to conduct under a first operating condition, so that the first power supply module supplies power to the target component; A second switching component is connected between the second power supply module and the target component, and the control terminal of the second switching component is connected to the control module; the control module is used to control the second switching component to conduct under a second operating condition, so that the second power supply module supplies power to the target component; The power consumption of the second power supply module is less than that of the first power supply module.

3. The power supply circuit of claim 2, wherein, The power supply circuit also includes: A first power supply branch is connected between the first power supply module and the control module; the first power supply module is used to supply power to the control module through the first power supply branch; The second power supply branch is connected between the second power supply module and the control module, and the second power supply module is used to supply power to the control module through the second power supply branch.

4. The power supply circuit according to claim 2 or 3, characterized in that, The first switching component includes at least one first switching transistor, the first terminal of the first switching transistor is connected to the output terminal of the first power supply module, the second terminal of the first switching transistor is connected to the input terminal of the target component, and the control terminal of the first switching transistor is connected to the control module. The second switching component includes at least one second switching transistor, the first terminal of the second switching transistor is connected to the output terminal of the second power supply module, the second terminal of the second switching transistor is connected to the input terminal of the target component, and the control terminal of the second switching transistor is connected to the control module.

5. The power supply circuit according to claim 4, characterized in that, The first switching transistor includes a first body diode, the anode of the first body diode is connected to a first terminal of the first switching transistor, and the cathode of the first body diode is connected to a second terminal of the first switching transistor; And / or, the second switching transistor includes a second body diode, the anode of the second body diode being connected to a first terminal of the second switching transistor, and the cathode of the second body diode being connected to a second terminal of the second switching transistor.

6. The power supply circuit of claim 5, wherein, When the first switching component includes at least two first switching transistors connected in series, the first terminal of the first first switching transistor is connected to the output terminal of the first power supply module, the second terminal of the first first switching transistor is connected to the second terminal of the second first switching transistor, the first terminal of the second first switching transistor is connected to the input terminal of the target component, and the control terminals of the first and second first switching transistors are both connected to the control module. And / or, when the second switching component includes at least two second switching transistors connected in series, the first terminal of the first second switching transistor is connected to the output terminal of the second power supply module, the second terminal of the first second switching transistor is connected to the second terminal of the second second switching transistor, the first terminal of the second second switching transistor is connected to the input terminal of the target component, and the control terminals of the first and second second switching transistors are both connected to the control module.

7. The power supply circuit according to claim 3, characterized in that, The first power supply branch includes a first diode, the anode of the first diode is connected to the output terminal of the first power supply module, and the cathode of the first diode is connected to the power supply terminal of the control module. The first power supply module is used to supply power to the control module through the first diode. And / or, the second power supply branch includes a second diode, the anode of the second diode being connected to the output terminal of the second power supply module, and the cathode of the second diode being connected to the power supply terminal of the control module; the second power supply module is used to supply power to the control module through the second diode.

8. The power supply circuit according to claim 2 or 3, characterized by The switching module further includes: At least one load switch, wherein a first end of the first switch component is connected to the first power supply module, a first end of the second switch component is connected to the second power supply module, a second end of the first switch component and a second end of the second switch component are connected to a first node, the load switch is connected between the first node and the target component, and the control terminal of the load switch is connected to the control module.

9. The power supply circuit of claim 8, wherein, The target component includes at least one functional load element, and the load switch includes at least one fourth switching transistor; The first terminal of the fourth switch is connected to the first node, the second terminal of the fourth switch is connected to the functional load element, and the control terminal of the fourth switch is connected to the control module.

10. The power supply circuit according to any one of claims 1 to 9, characterized by The control module includes: The MCU's power supply terminals are connected to the first power supply module through the first power supply branch of the power supply circuit and to the second power supply module through the second power supply branch of the power supply circuit; the MCU's control terminals are connected to the control terminals of the first and second switching components of the switching module.

11. The power supply circuit according to any one of claims 1 to 10, characterized by The power supply circuit also includes: A battery is connected in parallel with the first power supply module; the battery is used to supply power to the target component through the first switching component of the switching module, and / or to the control module through the first power supply branch of the power supply circuit; The voltage of the second power supply module is greater than the full-charge voltage of the battery, and / or the voltage of the second power supply module is adjustable; The first power supply module includes a first DC-DC converter, and the second power supply module includes a second DC-DC converter; the power consumption of the second DC-DC converter is less than the power consumption of the second DC-DC converter.

12. The power supply circuit according to any one of claims 1 to 11, characterized by The power supply circuit includes two control modules and two switching modules. The target component includes a first target component and a second target component. The first target component includes a safety load element and a functional load element. The second target component includes a safety load element. The two control modules include a first control module and a second control module; the two switch modules include a first switch module and a second switch module. The first switch module is connected between the first power supply module and the first target component, and between the second power supply module and the first target component. The first control module is connected to the control terminal of the first switch module. The first control module is used to control the first switch module to select the first power supply module and / or the second power supply module to supply power to the first target component. The second switch module is connected between the first power supply module and the second target component, and between the second power supply module and the second target component. The second control module is connected to the control terminal of the second switch module. The second control module is used to control the second switch module to select the first power supply module and / or the second power supply module to supply power to the second target component.

13. The power supply circuit according to claim 12, characterized in that, The first switching component of the first switching module has the same structure as the first switching component of the second switching module, and the second switching component of the first switching module has the same structure as the second switching component of the second switching module; the first power supply branch of the first switching module has the same structure as the first power supply branch of the second switching module; and the second power supply branch of the first switching module has the same structure as the second power supply branch of the second switching module. The load switch of the first switching module includes at least one fourth switching transistor; The first terminal of the fourth switching transistor of the first switching module is connected to the first node, the second terminal of the fourth switching transistor of the first switching module is connected to the functional load element of the first target component, and the control terminal of the fourth switching transistor of the first switching module is connected to the first control module; the fourth switching transistor of the first switching module and the functional load element of the first target component are configured in a one-to-one correspondence; wherein, the second end of the first switching component and the second end of the second switching component are connected to the first node.

14. A vehicle characterized by comprising: Includes the power supply circuit described in any one of claims 1-13.

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