Steer-by-wire control system for redundant power and electric vehicle

Abstract

The invention relates to the technical field of vehicles, and discloses a redundant power steer-by-wire control system and an electric vehicle. The system comprises a whole vehicle high-voltage battery, a main road power supply system and an auxiliary road power supply system; the main path power supply system comprises a main path DC-DC converter, a main path low-voltage battery and a main path communication assembly, the whole vehicle high-voltage battery supplies power to the main path communication assembly and the main path low-voltage battery through the main path DC-DC converter, and the main path DC-DC converter is used for converting high-voltage direct current of the whole vehicle high-voltage battery into low-voltage direct current; the main road low-voltage battery is used for supplying power to the main road communication assembly, and the main road communication assembly is used for controlling wheels of a target vehicle to execute target steering actions; the side road power supply system comprises a side road DC-DC converter, a side road low-voltage battery and a side road communication assembly, and the whole vehicle high-voltage battery supplies power to the side road communication assembly and the side road low-voltage battery through the side road DC-DC converter. Therefore, when one power supply system has single-point failure, the other power supply system can still ensure the steering function of the vehicle.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more particularly to a redundant power-driven steer-by-wire control system and an electric vehicle. Background Technology

[0002] In recent years, the intelligentization of automobiles has accelerated. As the main execution carrier for realizing intelligent driving, especially advanced autonomous driving, the chassis is constantly evolving towards mechatronics, control integration, and intelligent electrification. Among these, four-wheel independent steering is a crucial component of the corner module. Unlike current steering systems, the corner module requires a four-wheel independent steering system. This necessitates complete decoupling between the steering wheel and the four-wheel steering controller. The fully decoupled steering system must ensure that the vehicle can still perform steering functions even in the event of a single point of failure in the steering system. Therefore, the steering system must use a redundant power supply scheme.

[0003] In current technologies, steering controllers are typically powered by low voltage. A vehicle-to-DC (DC-DC) converter transforms the high-voltage DC power from the vehicle's high-voltage battery into the low-voltage DC power required by the steering controller, supplying it to the vehicle's low-voltage power supply circuit. This circuit is connected in parallel with a low-voltage battery, and together with the vehicle's low-voltage electrical components, forms the overall low-voltage power supply circuit. If a single point of failure occurs in this circuit, the entire low-voltage power supply circuit fails. All low-voltage controllers, including the steering controller, will malfunction due to lack of power, resulting in a reduced user experience. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the first objective of this invention is to propose a redundant power-controlled steer-by-wire system that, even if one power supply system experiences a single point of failure, the other power supply system can still guarantee the vehicle's steering function. This achieves decoupling of the steering wheel and wheels, and independent steering of all four wheels, eliminating the need for any switches to control the main power supply system and the auxiliary power supply system, thereby improving reliability and enhancing the user experience.

[0005] The second objective of this invention is to provide an electric vehicle.

[0006] To achieve the above objectives, a first aspect of the present invention provides a redundant power-based steer-by-wire control system, including a vehicle high-voltage battery, a main road power supply system, and an auxiliary road power supply system. The main road power supply system includes a main road DC-DC converter, a main road low-voltage battery, and a main road communication component. The vehicle high-voltage battery supplies power to the main road communication component and the main road low-voltage battery via the main road DC-DC converter. The main road DC-DC converter converts the high-voltage DC power from the vehicle high-voltage battery into low-voltage DC power. The main road low-voltage battery supplies power to the main road communication component, which controls the wheels of the target vehicle to perform a target steering action. The auxiliary road power supply system includes an auxiliary road DC-DC converter, an auxiliary road low-voltage battery, and an auxiliary road communication component. The vehicle high-voltage battery supplies power to the auxiliary road communication component and the auxiliary road low-voltage battery via the auxiliary road DC-DC converter. The auxiliary road DC-DC converter converts the high-voltage DC power from the vehicle high-voltage battery into low-voltage DC power. The auxiliary road low-voltage battery supplies power to the auxiliary road communication component, which controls the wheels of the target vehicle to perform a target steering action when the main road power supply system fails.

[0007] In addition, the redundant power steering control system according to the above embodiments of the present invention may also have the following additional technical features: According to some embodiments of the present invention, the main low-voltage battery and the auxiliary low-voltage battery are connected in parallel.

[0008] According to some embodiments of the present invention, the vehicle high-voltage battery is used to supply power to the main road communication component, the auxiliary road communication component, the main road low-voltage battery, and the auxiliary road low-voltage battery after the target vehicle is powered on.

[0009] According to some embodiments of the present invention, the main road low-voltage battery is used to supply power to the main road communication component after the target vehicle is powered off, and the auxiliary road low-voltage battery is used to supply power to the auxiliary road communication component after the target vehicle is powered off.

[0010] According to some embodiments of the present invention, the main road communication component includes an upper-level main controller, a middle-level main controller, and a lower-level main controller. The upper-level main controller is communicatively connected to the middle-level main controller, and the middle-level main controller is communicatively connected to the lower-level main controller. The upper-level main controller is used to determine the target steering angle for the target vehicle. The middle-level main controller is used to generate the control steering angle of the wheels of the target vehicle based on the target steering angle. The lower-level main controller is used to control the wheels to perform the target steering action based on the control steering angle.

[0011] According to some embodiments of the present invention, the auxiliary road communication component includes an upper auxiliary controller, a middle auxiliary controller, and a lower auxiliary controller. The upper auxiliary controller is communicatively connected to the middle auxiliary controller, and the middle auxiliary controller is communicatively connected to the lower auxiliary controller. The upper auxiliary controller is used to determine a target steering angle for a target vehicle. The middle auxiliary controller is used to generate a control steering angle for the wheels of the target vehicle based on the target steering angle. The lower auxiliary controller is used to control the wheels to perform the target steering action based on the control steering angle.

[0012] According to some embodiments of the present invention, controlling the steering angle includes a first control steering angle for the left front wheel of the target vehicle, a second control steering angle for the left rear wheel of the target vehicle, a third control steering angle for the right front wheel of the target vehicle, and a fourth control steering angle for the right rear wheel of the target vehicle.

[0013] According to some embodiments of the present invention, the lower-level main controller includes a left front wheel main controller, a left rear wheel main controller, a right front wheel main controller, and a right rear wheel main controller; the left front wheel main controller is used to control the left front wheel of the target vehicle to perform a first target steering action according to a first control steering angle; the left rear wheel main controller is used to control the left rear wheel of the target vehicle to perform a second target steering action according to a second control steering angle; the right front wheel main controller is used to control the right front wheel of the target vehicle to perform a third target steering action according to a third control steering angle; and the right rear wheel main controller is used to control the right rear wheel of the target vehicle to perform a fourth target steering action according to a fourth control steering angle.

[0014] According to some embodiments of the present invention, the lower-level auxiliary controller includes a left front wheel auxiliary controller, a left rear wheel auxiliary controller, a right front wheel auxiliary controller, and a right rear wheel auxiliary controller; the left front wheel auxiliary controller is used to control the left front wheel of the target vehicle to perform a first target steering action according to a first control steering angle; the left rear wheel auxiliary controller is used to control the left rear wheel of the target vehicle to perform a second target steering action according to a second control steering angle; the right front wheel auxiliary controller is used to control the right front wheel of the target vehicle to perform a third target steering action according to a third control steering angle; and the right rear wheel auxiliary controller is used to control the right rear wheel of the target vehicle to perform a fourth target steering action according to a fourth control steering angle.

[0015] According to an embodiment of the present invention, a redundant power-based steer-by-wire control system includes a vehicle high-voltage battery, a main road power supply system, and an auxiliary road power supply system. The main road power supply system includes a main road DC-DC converter, a main road low-voltage battery, and a main road communication component. The vehicle high-voltage battery supplies power to the main road communication component and the main road low-voltage battery through the main road DC-DC converter. The main road DC-DC converter converts the high-voltage DC power from the vehicle high-voltage battery into low-voltage DC power. The main road low-voltage battery supplies power to the main road communication component, which controls the wheels of the target vehicle to perform a target steering action. The auxiliary road power supply system includes an auxiliary road DC-DC converter, an auxiliary road low-voltage battery, and an auxiliary road communication component. The vehicle high-voltage battery supplies power to the auxiliary road communication component and the auxiliary road low-voltage battery through the auxiliary road DC-DC converter. The auxiliary road DC-DC converter converts the high-voltage DC power from the vehicle high-voltage battery into low-voltage DC power. The auxiliary road low-voltage battery supplies power to the auxiliary road communication component, which controls the wheels of the target vehicle to perform a target steering action when the main road power supply system fails. Therefore, when a single point of failure occurs in one power supply system, the other power supply system can still guarantee the vehicle's steering function, achieving decoupling of the steering wheel and wheels and independent steering of all four wheels. This eliminates the need for any switches to control the switching between the main power supply system and the auxiliary power supply system, improving reliability and enhancing the user experience.

[0016] To achieve the above objectives, a second aspect of the present invention provides an electric vehicle including the aforementioned redundant power-controlled steer-by-wire system with redundant backup.

[0017] According to the embodiments of the present invention, the electric vehicle, by implementing the redundant backup power-controlled steer-by-wire system described above, can ensure the vehicle's steering function even when one power supply system fails at a single point, thereby achieving decoupling of the steering wheel and wheels and independent steering of the four wheels. This eliminates the need for any switches to control the switching between the main power supply system and the auxiliary power supply system, improving reliability and enhancing the user experience.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a redundant power-driven steering control system based on some embodiments of the present invention. Figure 2 This is a schematic diagram of a redundant power-driven steering control system according to some embodiments of the present invention; Figure 3 This is a block diagram of an electric vehicle according to some embodiments of the present invention.

[0020] Explanation of reference numerals in the attached figures 100 - Redundant power drive-by-wire steering control system; 10 - Vehicle high-voltage battery; 20 - Main power supply system; 30 - Auxiliary power supply system; 21 - Main DC-DC converter; 22 - Main low-voltage battery; 23 - Main communication components; 231 - Upper main controller; 232 - Middle main controller; 233 - Lower main controller; 2331 - Left front wheel main controller; 2332 - Right front wheel main controller; 2333 - Left rear wheel main controller; 2334 - 234-Other main controllers of the vehicle, 31-Auxiliary DC-DC converter, 32-Auxiliary low-voltage battery, 33-Auxiliary communication components, 331-Upper auxiliary controller, 332-Middle auxiliary controller, 333-Lower auxiliary controller, 3331-Left front wheel auxiliary controller, 3332-Right front wheel auxiliary controller, 3333-Left rear wheel auxiliary controller, 3334-Right rear wheel auxiliary controller, 334-Other auxiliary controllers of the vehicle, 300-Vehicle. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0022] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this invention should have the ordinary meaning understood by those skilled in the art. The terms "first," "second," and similar terms used in the embodiments of this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] As described in the background section, the intelligentization of automobiles has accelerated in recent years. As the primary execution platform for realizing intelligent driving, especially advanced autonomous driving, the chassis is constantly evolving towards mechatronics integration, control integration, and intelligent electrification. Among these, four-wheel independent steering is a crucial component of the corner module. Unlike current steering systems, the corner module requires a four-wheel independent steering system. This necessitates complete decoupling between the steering wheel and the four-wheel steering controller. This fully decoupled steering system must ensure that the vehicle can still perform steering functions even in the event of a single point of failure in the steering system. Therefore, the steering system must utilize a redundant power supply scheme.

[0024] In the process of developing this invention, the applicant discovered that in related technologies, current steering controllers are typically powered by low voltage, and there are no special requirements for the vehicle's low-voltage power supply circuit. (Refer to...) Figure 1 This is a schematic diagram of a steer-by-wire control system with redundant power according to some embodiments of the present invention. The vehicle's DC-DC converter converts the high-voltage DC power (typically 400V / 800V) from the vehicle's high-voltage battery into the low-voltage DC power (typically 12V / 48V) required by the steering controller, supplying it to the vehicle's low-voltage power supply circuit. A low-voltage battery is connected in parallel to this circuit, and the low-voltage battery and the vehicle's low-voltage electrical components together form the low-voltage power supply circuit. If a single point of failure occurs in this power supply circuit (such as a short circuit to ground), the entire low-voltage power supply circuit fails. All low-voltage controllers, including the steering controller, will malfunction due to the lack of power, reducing the user experience.

[0025] Therefore, this invention enables the vehicle's steering function to be guaranteed even when one power supply system fails at a single point, achieving decoupling between the steering wheel and the wheels and independent steering of all four wheels. This eliminates the need for any switches to control the switching between the main power supply system and the auxiliary power supply system, improving reliability and enhancing the user experience.

[0026] The following description, with reference to the accompanying drawings, describes a redundant power-controlled steering-by-wire system and an electric vehicle according to embodiments of the present invention.

[0027] refer to Figure 2 This is a schematic diagram of a redundant power steering control system according to some embodiments of the present invention.

[0028] The redundant power steer-by-wire control system 100 of the present invention includes a vehicle high-voltage battery 10, a main road power supply system 20, and an auxiliary road power supply system 30.

[0029] Furthermore, the main power supply system 20 includes a main DC-DC converter 21, a main low-voltage battery 22, and a main communication component 23.

[0030] Specifically, the vehicle high-voltage battery 10 is powered by the main-circuit DC-DC converter 21 to the main-circuit communication component 23 and the main-circuit low-voltage battery 22. The main-circuit DC-DC converter 21 can convert the high-voltage DC power of the vehicle high-voltage battery 10 into low-voltage DC power. The main-circuit low-voltage battery 22 can power the main-circuit communication component 23. The main-circuit communication component 23 can control the wheels of the target vehicle to perform the target steering action. The vehicle high-voltage battery 10 can include energy type batteries and power type batteries with a voltage of 400V or 800V. The main-circuit low-voltage battery 22 can be a storage battery with a voltage of 12V or 48V.

[0031] Furthermore, the auxiliary power supply system 30 includes an auxiliary DC-DC converter 31, an auxiliary low-voltage battery 32, and an auxiliary communication component 33.

[0032] Specifically, the vehicle high-voltage battery 10 supplies power to the auxiliary communication component 33 and the auxiliary low-voltage battery 32 through the auxiliary DC-DC converter 31. The auxiliary DC-DC converter 31 can convert the high-voltage DC power of the vehicle high-voltage battery 10 into low-voltage DC power. The auxiliary low-voltage battery 32 can supply power to the auxiliary communication component 33. When the main power supply system 20 fails, the auxiliary communication component 33 can control the wheels of the target vehicle to perform the target steering action. The auxiliary low-voltage battery 32 can be a storage battery with a voltage of 12V or 48V.

[0033] Furthermore, the main power supply system 20 and the auxiliary power supply system 30 are completely isolated, so that if one power supply system fails at a single point, the other power supply system can still work normally to complete the steering function.

[0034] Furthermore, the main low-voltage battery 22 and the auxiliary low-voltage battery 32 are connected in parallel, which can extend the battery power supply time and increase the maximum output current.

[0035] Furthermore, the vehicle high-voltage battery 10 can supply power to the main road communication component 23, the auxiliary road communication component 33, the main road low-voltage battery 22, and the auxiliary road low-voltage battery 32 after the target vehicle is powered on.

[0036] Furthermore, the main road low-voltage battery 22 can supply power to the main road communication component 23 after the target vehicle is powered off, and the auxiliary road low-voltage battery 32 can supply power to the auxiliary road communication component 33 after the target vehicle is powered off.

[0037] Specifically, after the target vehicle is powered off, when the user needs to open or close the door, the main low-voltage battery 22 can supply power to the door lock components to ensure that the door opens or closes normally; after the target vehicle is powered off, when the user needs to open or close the door, the auxiliary low-voltage battery 32 can supply power to the door lock components to ensure that the door opens or closes normally, further improving the user experience.

[0038] Furthermore, the main road communication component 23 includes an upper-level main controller 231, a middle-level main controller 232, and a lower-level main controller 233. The upper-level main controller 231 is communicatively connected to the middle-level main controller 232, and the middle-level main controller 232 is communicatively connected to the lower-level main controller 233. The upper-level main controller 231 can determine the target steering angle for the target vehicle. In other words, the upper-level main controller 231 is responsible for simulating the driver's feel and analyzing the driver's intentions. The middle-level main controller 232 can generate the control steering angle of the wheels for the target vehicle based on the target steering angle. The lower-level main controller 233 can control the wheels to perform the target steering action based on the control steering angle.

[0039] Furthermore, the auxiliary road communication component 33 includes an upper-level auxiliary controller 331, a middle-level auxiliary controller 332, and a lower-level auxiliary controller 333. The upper-level auxiliary controller 331 is communicatively connected to the middle-level auxiliary controller 332, and the middle-level auxiliary controller 332 is communicatively connected to the lower-level auxiliary controller 333. The upper-level auxiliary controller 331 can determine the target steering angle for the target vehicle. In other words, the upper-level auxiliary controller 331 can simulate the driver's feel and analyze the driver's intentions. The middle-level auxiliary controller 332 can generate the control steering angle of the wheels for the target vehicle based on the target steering angle. The lower-level auxiliary controller 333 can control the wheels to perform the target steering action based on the control steering angle.

[0040] Furthermore, controlling the steering angle includes a first control steering angle for the left front wheel of the target vehicle, a second control steering angle for the left rear wheel of the target vehicle, a third control steering angle for the right front wheel of the target vehicle, and a fourth control steering angle for the right rear wheel of the target vehicle.

[0041] Furthermore, the lower-level main controller 233 includes a left front wheel main controller 2331, a left rear wheel main controller 2333, a right front wheel main controller 2332, and a right rear wheel main controller 2334. The left front wheel main controller 2331, upon receiving a first control steering angle for the left front wheel of the target vehicle sent by the middle-level main controller 232, can control the left front wheel of the target vehicle to perform a first target steering action based on the first control steering angle. The left rear wheel main controller 2333, upon receiving a second control steering angle for the left rear wheel of the target vehicle sent by the middle-level main controller 232... Then, the left rear wheel of the target vehicle is controlled to perform a second target steering action according to the second control steering angle; the right front wheel main controller 2332 can control the right front wheel of the target vehicle to perform a third target steering action according to the third control steering angle sent by the middle layer main controller 232 after receiving the third control steering angle for the right front wheel of the target vehicle; the right rear wheel main controller 2334 can control the right rear wheel of the target vehicle to perform a fourth target steering action according to the fourth control steering angle sent by the middle layer main controller 232 after receiving the fourth control steering angle for the right rear wheel of the target vehicle.

[0042] Furthermore, the lower-level auxiliary controller 333 includes a left front wheel auxiliary controller 3331, a left rear wheel auxiliary controller 3333, a right front wheel auxiliary controller 3332, and a right rear wheel auxiliary controller 3334. The left front wheel auxiliary controller 3331 can control the left front wheel of the target vehicle to perform a first target steering action after receiving a first control steering angle for the left front wheel of the target vehicle sent by the middle-level auxiliary controller 332; the left rear wheel auxiliary controller 3333 can control the left rear wheel of the target vehicle to perform a second target steering action after receiving a second control steering angle for the left rear wheel of the target vehicle sent by the middle-level auxiliary controller 332; the right front wheel auxiliary controller 3332 can control the right front wheel of the target vehicle to perform a third target steering action after receiving a third control steering angle for the right front wheel of the target vehicle sent by the middle-level auxiliary controller 332; and the right rear wheel auxiliary controller 3334 can control the right rear wheel of the target vehicle to perform a fourth target steering action after receiving a fourth control steering angle for the right rear wheel of the target vehicle sent by the middle-level auxiliary controller 332.

[0043] Furthermore, the upper-level main controller 231 can determine the target steering angle for the target vehicle. After determining the target steering angle, the upper-level main controller 231 sends the target steering angle to the middle-level main controller 232. The middle-level main controller 232 receives the target steering angle from the upper-level main controller 231 and generates control steering angles for the wheels of the target vehicle based on the target steering angle. Then, the middle-level main controller 232 sends the control steering angles for the wheels of the target vehicle to the lower-level main controller 233. The lower-level main controller 233 receives the control steering angles from the middle-level main controller 232 and controls the wheels to perform the target steering action based on the control steering angles. This enables decoupling of the steering wheel and wheels and independent steering of all four wheels, improving reliability and enhancing the user experience.

[0044] Furthermore, when both the main power supply system 20 and the auxiliary power supply system 30 are fault-free, the main DC-DC converter 21 and the auxiliary DC-DC converter 31 work together to convert the high-voltage DC power of the vehicle's high-voltage battery 10 into low-voltage DC power, which is then converted into the main power supply system 20 and the auxiliary power supply system 30 respectively. The main and auxiliary controllers work together to achieve the steering function.

[0045] When the auxiliary power supply system 30 fails, all controllers on the auxiliary power supply system 30 cannot work due to the power supply failure, but the main power supply system 20 works normally. The main DC-DC converter 21 converts the high-voltage DC power from the vehicle's high-voltage battery 10 into low-voltage DC power and transfers it to the main power supply system 20. Since the main power supply system 20 works normally, the main controller of the steer-by-wire control system can still work normally to achieve the steering function. When one power supply system fails at a single point, the other power supply system can still guarantee the vehicle's steering function, realizing the decoupling of the steering wheel and wheels and independent steering of the four wheels. This eliminates the need for any switch to control the main power supply system 20 and the auxiliary power supply system 30, improving reliability and user experience.

[0046] When the main power supply system 20 fails, all controllers on the main power supply system 20 cannot work due to the power supply failure, but the auxiliary power supply system 30 works normally. The auxiliary DC-DC converter 31 converts the high-voltage DC power from the vehicle's high-voltage battery 10 into low-voltage DC power and transfers it to the auxiliary power supply system 30. Since the auxiliary power supply system 30 works normally, the auxiliary controller of the steer-by-wire control system can still work normally to achieve the steering function. When one power supply system fails at a single point, the other power supply system can still guarantee the vehicle's steering function, realizing the decoupling of the steering wheel and wheels and independent steering of the four wheels. This eliminates the need for any switch to control the main power supply system 20 and the auxiliary power supply system 30, improving reliability and user experience.

[0047] Furthermore, the main road communication component 23 also includes other main controllers 234 for the vehicle. These other main controllers 234 may include a seat main controller, an air conditioning main controller, and a sunroof main controller. The seat main controller can control the various directions of adjustment of the electric seat (forward, backward, height, tilt), seat memory, massage, ventilation, and heating functions. The air conditioning main controller can control the blower speed, vent position, compressor operation, and mixing of hot and cold air to achieve the set interior temperature. The sunroof main controller can control the opening, closing, tilting, and anti-pinch functions of the sunroof.

[0048] Furthermore, the auxiliary road communication component 33 also includes other vehicle auxiliary controllers 334, which may include seat auxiliary controllers, air conditioning auxiliary controllers, and sunroof auxiliary controllers. The seat auxiliary controller can control the various directions of adjustment of the electric seat (forward, backward, height, tilt), seat memory, massage, ventilation, and heating functions; the air conditioning auxiliary controller can control the blower speed, vent position, compressor operation, and mixing of hot and cold air to achieve the set interior temperature; the sunroof auxiliary controller can control the opening, closing, tilting, and anti-pinch function of the sunroof.

[0049] In summary, the redundant power steer-by-wire control system according to embodiments of the present invention includes a vehicle high-voltage battery, a main road power supply system, and an auxiliary road power supply system. The main road power supply system includes a main road DC-DC converter, a main road low-voltage battery, and a main road communication component. The vehicle high-voltage battery supplies power to the main road communication component and the main road low-voltage battery through the main road DC-DC converter. The main road DC-DC converter converts the high-voltage DC power from the vehicle high-voltage battery into low-voltage DC power. The main road low-voltage battery supplies power to the main road communication component, which controls the wheels of the target vehicle to perform a target steering action. The auxiliary road power supply system includes an auxiliary road DC-DC converter, an auxiliary road low-voltage battery, and an auxiliary road communication component. The vehicle high-voltage battery supplies power to the auxiliary road communication component and the auxiliary road low-voltage battery through the auxiliary road DC-DC converter. The auxiliary road DC-DC converter converts the high-voltage DC power from the vehicle high-voltage battery into low-voltage DC power. The auxiliary road low-voltage battery supplies power to the auxiliary road communication component, which controls the wheels of the target vehicle to perform a target steering action when the main road power supply system fails. Therefore, when a single point of failure occurs in one power supply system, the other power supply system can still guarantee the vehicle's steering function, achieving decoupling of the steering wheel and wheels and independent steering of all four wheels. This eliminates the need for any switches to control the switching between the main power supply system and the auxiliary power supply system, improving reliability and enhancing the user experience.

[0050] Corresponding to the above embodiments, the present invention also proposes an electric vehicle.

[0051] like Figure 3 As shown, the electric vehicle 300 of this embodiment includes the above-described redundant backup power-controlled steer-by-wire system 100.

[0052] According to the embodiments of the present invention, the electric vehicle, by implementing the redundant backup power-controlled steer-by-wire system described above, can ensure the vehicle's steering function even when one power supply system fails at a single point, thereby achieving decoupling of the steering wheel and wheels and independent steering of the four wheels. This eliminates the need for any switches to control the switching between the main power supply system and the auxiliary power supply system, improving reliability and enhancing the user experience.

[0053] Furthermore, although the operations of the method of the present invention are described in a specific order in the accompanying drawings, this does not require or imply that these operations must be performed in that specific order, or that all of the operations shown must be performed to achieve the desired result. Rather, the steps depicted in the flowchart may be performed in a different order. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step, and / or one step may be broken down into multiple steps.

[0054] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this invention should have the ordinary meaning understood by those skilled in the art. The terms "first," "second," and similar terms used in the embodiments of this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0055] While the spirit and principles of the invention have been described with reference to several specific embodiments, it should be understood that the invention is not limited to the disclosed specific embodiments, and the division of aspects does not imply that features in these aspects cannot be combined for benefit; such division is merely for ease of description. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. The scope of the appended claims is to be interpreted in the broadest sense, thereby encompassing all such modifications and equivalent structures and functions.

Claims

1. A redundant power-controlled steering-by-wire system, characterized in that, Including the vehicle high-voltage battery (10), the main road power supply system (20) and the auxiliary road power supply system (30); The main road power supply system (20) includes a main road DC-DC converter (21), a main road low-voltage battery (22), and a main road communication component (23). The vehicle high-voltage battery (10) supplies power to the main road communication component (23) and the main road low-voltage battery (22) through the main road DC-DC converter (21). The main road DC-DC converter (21) is used to convert the high-voltage DC power of the vehicle high-voltage battery (10) into low-voltage DC power. The main road low-voltage battery (22) is used to supply power to the main road communication component (23). The main road communication component (23) is used to control the wheels of the target vehicle to perform the target steering action. The auxiliary road power supply system (30) includes an auxiliary road DC-DC converter (31), an auxiliary road low-voltage battery (32), and an auxiliary road communication component (33). The vehicle high-voltage battery (10) supplies power to the auxiliary road communication component (33) and the auxiliary road low-voltage battery (32) through the auxiliary road DC-DC converter (31). The auxiliary road DC-DC converter (31) is used to convert the high-voltage DC power of the vehicle high-voltage battery (10) into low-voltage DC power. The auxiliary road low-voltage battery (32) is used to supply power to the auxiliary road communication component (33). The auxiliary road communication component (33) is used to control the wheels of the target vehicle to perform target steering actions when the main road power supply system (20) fails.

2. The redundant power-controlled steering system according to claim 1, characterized in that, The main low-voltage battery (22) and the auxiliary low-voltage battery (32) are connected in parallel.

3. The redundant power-controlled steering system according to claim 1, characterized in that, The vehicle high-voltage battery (10) is used to supply power to the main road communication component (23), the auxiliary road communication component (33), the main road low-voltage battery (22) and the auxiliary road low-voltage battery (32) after the target vehicle is powered on.

4. The redundant power-controlled steering system according to claim 1, characterized in that, The main road low-voltage battery (22) is used to supply power to the main road communication component (23) after the target vehicle is powered off, and the auxiliary road low-voltage battery (32) is used to supply power to the auxiliary road communication component (33) after the target vehicle is powered off.

5. The redundant power-controlled steering system according to claim 1, characterized in that, The main road communication component (23) includes an upper main controller (231), a middle main controller (232), and a lower main controller (233). The upper main controller (231) is communicatively connected to the middle main controller (232), and the middle main controller (232) is communicatively connected to the lower main controller (233). The upper main controller (231) is used to determine the target steering angle for the target vehicle. The middle main controller (232) is used to generate the control steering angle of the wheels of the target vehicle based on the target steering angle. The lower main controller (233) is used to control the wheels to perform the target steering action based on the control steering angle.

6. The redundant power-controlled steering system according to claim 1, characterized in that, The auxiliary road communication component (33) includes an upper auxiliary controller (331), a middle auxiliary controller (332), and a lower auxiliary controller (333). The upper auxiliary controller (331) is communicatively connected to the middle auxiliary controller (332), and the middle auxiliary controller (332) is communicatively connected to the lower auxiliary controller (333). The upper auxiliary controller (331) is used to determine the target steering angle for the target vehicle. The middle auxiliary controller (332) is used to generate the control steering angle for the wheels of the target vehicle based on the target steering angle. The lower auxiliary controller (333) is used to control the wheels to perform the target steering action based on the control steering angle.

7. The redundant power steering control system according to any one of claims 5 or 6, characterized in that, The control steering angle includes a first control steering angle for the left front wheel of the target vehicle, a second control steering angle for the left rear wheel of the target vehicle, a third control steering angle for the right front wheel of the target vehicle, and a fourth control steering angle for the right rear wheel of the target vehicle.

8. The redundant power-controlled steering system according to claim 7, characterized in that, The lower-level main controller (233) includes a left front wheel main controller (2331), a left rear wheel main controller (2333), a right front wheel main controller (2332), and a right rear wheel main controller (2334). The left front wheel main controller (2331) is used to control the left front wheel of the target vehicle to perform a first target steering action according to the first control steering angle; The left rear wheel main controller (2333) is used to control the left rear wheel of the target vehicle to perform a second target steering action according to the second control steering angle; The right front wheel main controller (2332) is used to control the right front wheel of the target vehicle to perform a third target steering action according to the third control steering angle; The right rear wheel main controller (2334) is used to control the right rear wheel of the target vehicle to perform a fourth target steering action according to the fourth control steering angle.

9. The redundant power-controlled steering system according to claim 8, characterized in that, The lower-level auxiliary controller (333) includes a left front wheel auxiliary controller (3331), a left rear wheel auxiliary controller (3333), a right front wheel auxiliary controller (3332), and a right rear wheel auxiliary controller (3334). The left front wheel auxiliary controller (3331) is used to control the left front wheel of the target vehicle to perform the first target steering action according to the first control steering angle; The left rear wheel auxiliary controller (3333) is used to control the left rear wheel of the target vehicle to perform the second target steering action according to the second control steering angle; The right front wheel auxiliary controller (3332) is used to control the right front wheel of the target vehicle to perform the third target steering action according to the third control steering angle; The right rear wheel auxiliary controller (3334) is used to control the right rear wheel of the target vehicle to perform the fourth target steering action according to the fourth control steering angle.

10. An electric vehicle, characterized in that, A steer-by-wire control system including redundant power as described in any one of claims 1-9.

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