Power redundancy system and method of electric automobile and electric automobile

Abstract

The invention provides a power redundancy system and method of an electric vehicle and the electric vehicle, and relates to the technical field of electric vehicles. The power isolator is kept on under the condition that the first power grid and the second power grid are not detected to be abnormal, so that the power battery charges the storage battery through the vehicle-mounted charger and supplies power to the first functional device set and the second functional device set; the power supply isolator is used for executing disconnection operation under the condition that the first power grid is detected to be abnormal, and the power battery is used for charging the storage battery with preset charging power and supplying power to the second functional device set under the condition that the first power grid is detected to be abnormal; and the power isolator is used for executing disconnection operation under the condition of detecting that the second power grid is abnormal, and the power battery keeps charging the first functional device set through the vehicle-mounted charger. Therefore, only one vehicle-mounted charger and one storage battery are needed, power redundancy can be achieved, and the hardware cost and the installation cost are low.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and particularly to a power redundancy system, a method, and an electric vehicle for an electric vehicle. Background Art

[0002] L3 autonomous driving means that in a specific driving traffic environment, the vehicle can enable the driver to completely not control the vehicle to achieve limited autonomous driving. In a specific driving traffic environment, the vehicle can complete some driving tasks and monitor the driving environment in specific situations, but the driver still needs to remain vigilant and be ready to take over the vehicle control right at any time.

[0003] Since the power redundancy technology can provide "fail-operational" capabilities by eliminating single-point failures and becomes a necessary condition to meet the functional safety goals, the power redundancy technology is one of the essential functions for vehicles with L3 autonomous driving capabilities. However, currently, implementing the power redundancy technology in vehicles with L3 autonomous driving capabilities requires a lot of hardware costs and installation costs, and in the case of abnormal power circuits, some functions of the vehicle are prone to failure, resulting in the inability to complete L3 autonomous driving. Summary of the Invention

[0004] The present application provides a power redundancy system, a method, and an electric vehicle for an electric vehicle, which are used to solve the problems in the prior art that implementing the power redundancy technology in vehicles with L3 autonomous driving capabilities requires a lot of hardware costs and installation costs, and in the case of abnormal power circuits, some functions of the vehicle are prone to failure, resulting in the inability to complete L3 autonomous driving.

[0005] In a first aspect, the present application provides a power redundancy system for an electric vehicle, including a power battery, an on-vehicle charger, a power isolator, a storage battery, a first set of functional devices for executing target vehicle functions, and a second set of functional devices for executing target vehicle functions, and the combination of the first set of functional devices and the second set of functional devices is also used to execute target vehicle functions. The power battery, the on-vehicle charger, and the power isolator are electrically connected in sequence to form a first power grid, the power battery, the storage battery, and the power isolator are electrically connected in sequence to form a second power grid, and the power battery, the on-vehicle charger, the power isolator, and the storage battery are connected in series to form a loop;

[0006] The on-vehicle charger is electrically connected to the first set of functional devices, the storage battery is electrically connected to the second set of functional devices, one end of the power isolator is connected between the on-vehicle charger and the first set of functional devices, and the other end of the power isolator is connected between the storage battery and the second set of functional devices, wherein,

[0007] The power isolator remains conducting when no abnormalities are detected in the first power grid and the second power grid, so that the power battery charges the storage battery through the on-vehicle charger and supplies power to the first functional device set and the second functional device set;

[0008] The power isolator is used to perform a disconnection operation when an abnormality is detected in the first power grid. The power battery is used to charge the storage battery at a preset charging power and supply power to the second functional device set when an abnormality is detected in the first power grid;

[0009] The power isolator is used to perform a disconnection operation when an abnormality is detected in the second power grid, and the power battery keeps charging the first functional device set through the on-vehicle charger.

[0010] In some embodiments, the first functional device set includes an autonomous driving domain controller, a camera, a millimeter-wave radar in front of the electric vehicle, a millimeter-wave radar at the left rear corner of the electric vehicle, a millimeter-wave radar at the right rear corner of the electric vehicle, a lidar in front of the electric vehicle, a lidar on the left side of the electric vehicle, a lidar on the right side of the electric vehicle, and an ultrasonic radar disposed on the electric vehicle, which are used to implement the scene perception sub-function in the automatic parking function in the autonomous driving domain.

[0011] The second functional device set includes an autonomous driving domain controller, a camera, a millimeter-wave radar in front of the left side of the electric vehicle, a millimeter-wave radar in front of the right side of the electric vehicle, and a lidar directly behind the electric vehicle, which are used to implement the scene perception sub-function in the automatic parking function in the autonomous driving domain.

[0012] In some embodiments, the first functional device set includes a parking controller, a redundant wheel speed control unit, and a steering controller on the chassis domain, which are used to implement the braking and steering sub-functions in the automatic parking function.

[0013] The second functional device set includes a parking controller, a brake controller, and a redundant corner control unit on the chassis domain, which are used to implement the braking and steering sub-functions in the automatic parking function.

[0014] In some embodiments, the first functional device set includes the right front headlight, the right rear headlight, and the right rear fixed side headlight on the cockpit domain, which are used to implement the vehicle exterior lighting control function. The second functional device set includes the left front headlight and the rear tailgate headlight on the cockpit domain, which are used to implement the vehicle exterior lighting control function.

[0015] In some embodiments, the first functional device set includes a seat belt vibration module and a light strip disposed on the steering wheel of the electric vehicle on the cockpit domain, which are used to implement the driver takeover electric vehicle prompt function.

[0016] The second functional device set includes a cockpit controller, an instrument panel, a center control screen, and a speaker on the cockpit domain for implementing the prompt function for the driver to take over the electric vehicle.

[0017] In some embodiments, the on-vehicle charger is also electrically connected to a thermal management controller and an electric fan.

[0018] In some embodiments, the on-vehicle charger is also electrically connected to a battery management system.

[0019] In some embodiments, a vehicle controller and a body controller are also connected in parallel to the power isolator.

[0020] In some embodiments, the on-vehicle charger is also electrically connected to a front motor controller of the vehicle, and the power battery and the storage battery are also electrically connected to a rear motor controller;

[0021] Alternatively, the on-vehicle charger is also electrically connected to a rear motor controller of the vehicle, and the power battery and the storage battery are also electrically connected to a front motor controller.

[0022] In some embodiments, the power battery and the storage battery are also electrically connected to a rear door control module of the vehicle, four side door control modules, and an airbag controller.

[0023] In some embodiments, the storage battery is used to supply power to the second functional device set when the electric vehicle is in an off state or a sleep state.

[0024] In some embodiments, the combined power consumption of the second functional device set is lower than that of the first functional device set.

[0025] In a second aspect, the present application also provides a power redundancy method for an electric vehicle, which is applied to the power redundancy system of the electric vehicle provided in the first aspect of the present application. The method provided in the present application includes:

[0026] The power isolator remains conducting when no abnormalities are detected in the first power grid and the second power grid, so that the power battery charges the storage battery through the on-vehicle charger and supplies power to the first functional device set and the second functional device set;

[0027] The power isolator performs a disconnection operation when an abnormality is detected in the first power grid;

[0028] When an abnormality is detected in the first power grid, the power battery charges the storage battery at a preset charging power and supplies power to the second functional device set;

[0029] The power isolator performs a disconnection operation when an abnormality is detected in the second power grid;

[0030] The power battery is kept charged for the first set of functional devices through the on-vehicle charger.

[0031] In some embodiments, the method provided by this application further includes:

[0032] When the electric vehicle is in the off state or the sleep state, the storage battery supplies power to the second set of functional devices.

[0033] In a third aspect, this application provides an electric vehicle, including the power supply redundancy system of the electric vehicle in the first aspect of this application.

[0034] This application provides a power supply redundancy system, a method, and an electric vehicle for an electric vehicle. Since the power isolator remains conductive when no abnormalities are detected in the first power grid and the second power grid, the power battery charges the storage battery through the on-vehicle charger and supplies power to the first set of functional devices and the second set of functional devices; the power isolator is used to perform a disconnection operation when an abnormality is detected in the first power grid. When an abnormality is detected in the first power grid, the power battery charges the storage battery at a preset charging power and supplies power to the second set of functional devices; the power isolator is used to perform a disconnection operation when an abnormality is detected in the second power grid, and the power battery is kept charged for the first set of functional devices through the on-vehicle charger. In this way, only one on-vehicle charger and one storage battery are required to achieve power redundancy, with low hardware costs and installation costs. Moreover, both the first set of functional devices and the second set of functional devices are used to achieve the vehicle target functions. Thus, whether an abnormality occurs in the first power grid or the second power grid, the electric vehicle can still achieve the vehicle target functions and can reliably achieve L3 autonomous driving. Description of the Drawings

[0035] In order to more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0036] Figure 1 One of the schematic diagrams of the architecture of the power supply redundancy system of the electric vehicle provided by the embodiment of this application

[0037] Figure 2 Two of the schematic diagrams of the architecture of the power supply redundancy system of the electric vehicle provided by the embodiment of this application;

[0038] Figure 3 Three of the schematic diagrams of the architecture of the power supply redundancy system of the electric vehicle provided by the embodiment of this application;

[0039] Figure 4 The flowchart of the power redundancy method for an electric vehicle provided by an embodiment of this application. Detailed implementation manners

[0040] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be understood, however, that these descriptions are merely exemplary and are not intended to limit the scope of the present disclosure. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concepts of the present disclosure.

[0041] Various structural schematic diagrams according to embodiments of the present disclosure are shown in the accompanying drawings. These figures are not drawn to scale, where for the purpose of clear illustration, some details are enlarged and some details may be omitted. The shapes of various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are merely exemplary and may actually deviate due to manufacturing tolerances or technical limitations, and those skilled in the art can additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0042] In the context of the present disclosure, when a layer / component is referred to as being "on" another layer / component, the layer / component may be directly on the other layer / component, or there may be an intermediate layer / component between them. Additionally, if a layer / component is "on" another layer / component in one orientation, then when the orientation is reversed, the layer / component may be "under" the other layer / component.

[0043] Hereinafter, the technical solutions of this application and how the technical solutions of this application solve the above technical problems will be described in detail with specific embodiments. These several specific embodiments below can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0044] Please refer to Figure 1 , an embodiment of this application provides a power redundancy system for an electric vehicle, including a power battery 101, an on-vehicle charger 102, a power isolator 103, a storage battery 104, a first functional device set 101 for executing target vehicle functions, and a second functional device set 102 for executing target vehicle functions, and the combination of the first functional device set 101 and the second functional device set 102 is also used to execute target vehicle functions. The power battery 101, the on-vehicle charger 102, and the power isolator 103 are electrically connected in sequence to form a first power grid, the power battery 101, the storage battery 104, and the power isolator 103 are electrically connected in sequence to form a second power grid, and the power battery 101, the on-vehicle charger 102, the power isolator 103, and the storage battery 104 are connected in series to form a loop. It should be noted that the power battery 101 integrates a DC / DC function.

[0045] The on-vehicle charger 102 is electrically connected to the first functional device set 101, the storage battery 104 is electrically connected to the second functional device set 102, one end of the power isolator 103 is connected between the on-vehicle charger 102 and the first functional device set 101, and the other end of the power isolator 103 is connected between the storage battery 104 and the second functional device set 102.

[0046] The power isolator 103 remains conducting when no abnormalities are detected in the first power grid and the second power grid, so that the power battery 101 charges the storage battery 104 through the on-vehicle charger 102 and supplies power to the first functional device set 101 and the second functional device set 102. It should be noted that the combination of the first functional device set 101 and the second functional device set 102 achieves better effects in performing the target vehicle functions than when the first functional device set 101 alone performs the target vehicle functions or when the second functional device set 102 alone performs the target vehicle functions.

[0047] The power isolator 103 is used to perform a disconnection operation when an abnormality is detected in the first power grid. When an abnormality is detected in the first power grid, the power battery 101 charges the storage battery 104 at a preset charging power and supplies power to the second functional device set 102.

[0048] The power isolator 103 is used to perform a disconnection operation when an abnormality is detected in the second power grid, and the power battery 101 continues to charge the first functional device set 101 through the on-vehicle charger 102.

[0049] In addition, the storage battery 104 is used to supply power to the second functional device set 102 when the electric vehicle is in the off state or the sleep state.

[0050] A power redundancy system for an electric vehicle provided by an embodiment of the present application. Since the power isolator 103 remains conducting when no abnormalities are detected in the first power grid and the second power grid, the power battery 101 charges the storage battery 104 through the on-vehicle charger 102 and supplies power to the first functional device set 101 and the second functional device set 102; the power isolator 103 is used to perform a disconnection operation when an abnormality is detected in the first power grid, and the power battery 101 is used to charge the storage battery 104 at a preset charging power and supply power to the second functional device set 102 when an abnormality is detected in the first power grid; the power isolator 103 is used to perform a disconnection operation when an abnormality is detected in the second power grid, and the power battery 101 continues to charge the first functional device set 101 through the on-vehicle charger 102. In this way, only one on-vehicle charger 102 and one storage battery 104 are required to achieve power redundancy, with low hardware costs and installation costs. Moreover, both the first functional device set 101 and the second functional device set 102 are used to achieve the vehicle target function. Thus, whether the first power grid or the second power grid has an abnormality, the electric vehicle can still achieve the vehicle target function and can reliably achieve L3 autonomous driving.

[0051] As Figure 2 shown, the first functional device set 101 includes, in the autonomous driving domain, an autonomous driving domain controller for implementing the scene perception sub-function in the automatic parking function, a camera, millimeter-wave radars located in front of the electric vehicle, millimeter-wave radars located at the left rear corner of the electric vehicle, millimeter-wave radars located at the right rear corner of the electric vehicle, lidars located in front of the electric vehicle, lidars located on the left side of the electric vehicle, lidars located on the right side of the electric vehicle, and ultrasonic radars provided on the electric vehicle.

[0052] The second functional device set 102 includes, in the autonomous driving domain, an autonomous driving domain controller for implementing the scene perception sub-function in the automatic parking function, a camera, millimeter-wave radars located in front of the left side of the electric vehicle, millimeter-wave radars located in front of the right side of the electric vehicle, and a lidar located directly behind the electric vehicle. In this way, whether the first power grid or the second power grid has an abnormality, the electric vehicle can still achieve the scene perception sub-function (i.e., the vehicle target function) in the automatic parking function and can reliably achieve L3 autonomous driving.

[0053] Still as Figure 2As shown, the first functional device set 101 includes a parking controller, a redundant wheel speed control unit, and a steering controller on the chassis domain, which are used to implement the braking and steering sub-functions in the automatic parking function; the second functional device set 102 includes a parking controller, a braking controller, and a redundant corner control unit on the chassis domain, which are used to implement the braking and steering sub-functions in the automatic parking function. In this way, whether the first power grid or the second power grid has an abnormality, the electric vehicle can still implement the braking and steering sub-functions (i.e., the vehicle target function) in the automatic parking function, and can reliably implement L3-level autonomous driving.

[0054] As Figure 3 shown, the first functional device set 101 includes a right front headlight, a right rear headlight, and a right rear fixed-layer headlight on the cockpit domain, which are used to implement the vehicle exterior lighting control function; the second functional device set 102 includes a left front headlight and a rear tailgate headlight on the cockpit domain, which are used to implement the vehicle exterior lighting control function. In this way, whether the first power grid or the second power grid has an abnormality, the electric vehicle can still implement the vehicle exterior lighting control function.

[0055] Still as Figure 3 shown, the first functional device set 101 includes a seat belt vibration module and a light strip arranged on the steering wheel of the electric vehicle on the cockpit domain, which are used to implement the driver takeover electric vehicle prompt function; the second functional device set 102 includes a cockpit controller, an instrument panel, a central control screen, and a speaker on the cockpit domain, which are used to implement the driver takeover electric vehicle prompt function. In this way, whether the first power grid or the second power grid has an abnormality, the driver takeover electric vehicle prompt function can still be implemented.

[0056] Exemplarily, as Figure 3 shown, the on-vehicle charger 102 is also electrically connected to a thermal management controller and an electric fan. In this way, it can ensure that the heat dissipation function can be continuously executed in the scenario where the power battery 101 is working.

[0057] Exemplarily, as Figure 3 shown, the on-vehicle charger 102 is also electrically connected to a battery management system, which can avoid the abnormal situation that the on-vehicle charger 102 cannot be used normally when the second power grid has an abnormality, resulting in an abnormality in the first power grid.

[0058] Exemplarily, as Figure 2 and Figure 3 shown, the power isolator 103 is also connected in parallel with a vehicle controller and a body controller. In this way, it can ensure that whether the first power grid or the second power grid has an abnormality, the function of the vehicle controller remains effective (such as implementing functions such as powering on and off the whole vehicle), and the function of the body controller remains effective (such as receiving the signal of the vehicle controller to enable the KL15 signal).

[0059] The on-vehicle charger 102 is also electrically connected to the front motor controller of the vehicle, and the power battery 101 and the storage battery 104 are also electrically connected to the rear motor controller. Alternatively, the on-vehicle charger 102 is also electrically connected to the rear motor controller of the vehicle, and the power battery 101 and the storage battery 104 are also electrically connected to the front motor controller. In this way, whether the first power grid or the second power grid has an abnormality, the vehicle can still achieve the control of the motor negative torque to make up for the insufficient power of the main braking system.

[0060] In some embodiments, the power battery 101 and the storage battery 104 are also electrically connected to the rear door control module, four side door control modules, and the airbag controller of the vehicle. It should be noted that when the vehicle collides, it may cause an abnormality in the first power grid. At this time, the storage battery 104 can still continuously supply power to the rear door control module, four side door control modules, and the airbag controller of the vehicle to ensure the safety of the passengers in the vehicle.

[0061] It should be noted that in the above Figure 2 and Figure 3 , the red line part is the circuit branch powered by the first power grid; the green line part is the circuit branch powered by the second power grid.

[0062] In some embodiments, the storage battery 104 is used to supply power to the second functional device set 102 when the electric vehicle is in the off state or the sleep state. It should be noted that since the power of the storage battery 104 is limited and the output power supply is small, the power consumption of the combination of the second functional device set 102 can be lower than that of the first functional device set 101, which can extend the endurance time of the storage battery 104.

[0063] In addition, the embodiment of the present application also provides a power redundancy method for an electric vehicle, which is applied to the power redundancy system of the electric vehicle provided in the above embodiment of the present application. It should be noted that the basic principle and the technical effects generated by the power redundancy method for the electric vehicle provided in the embodiment of the present application are the same as those in the above embodiment. For the sake of brief description, for the parts not mentioned in the embodiment of the present application, reference can be made to the corresponding content in the above embodiment. As Figure 4 shown, the method provided in the embodiment of the present application includes:

[0064] S401: The power isolator 103 remains conductive when no abnormality in the first power grid and the second power grid is detected, so that the power battery 101 charges the storage battery 104 through the on-vehicle charger 102 and supplies power to the first functional device set 101 and the second functional device set 102.

[0065] S402: When the power isolator 103 detects an abnormality in the first power grid, it performs a disconnection operation.

[0066] S403: When the power battery 101 detects an abnormality in the first power grid, it charges the storage battery 104 at a preset charging power and supplies power to the second functional device set 102.

[0067] S404: When the power isolator 103 detects an abnormality in the second power grid, it performs a disconnection operation.

[0068] S405: The power battery 101 continues to charge the first functional device set 101 through the on-vehicle charger 102.

[0069] It should be noted that there is no sequence between the above S402 - S403 and the above S404 - S405.

[0070] In some embodiments, the method provided by the embodiments of the present application further includes: when the electric vehicle is in an off state or a sleep state, the storage battery 104 supplies power to the second functional device set 102.

[0071] In addition, the embodiments of the present application also provide an electric vehicle, including the power redundancy system of the electric vehicle provided by the above embodiments of the present application.

[0072] In the above description, no detailed description is made of the technical details such as the composition of each layer. However, those skilled in the art should understand that various technical means can be used to form layers, regions, etc. of the required shapes. In addition, in order to form the same structure, those skilled in the art can also design methods that are not exactly the same as the methods described above. In addition, although the above embodiments are described separately, this does not mean that the measures in each embodiment cannot be used advantageously in combination.

[0073] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concepts. Therefore, the appended claims are intended to be interpreted to include the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0074] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

1. A power redundancy system for an electric vehicle, characterized in that, It includes a power battery, an on-vehicle charger, a power isolator, a storage battery, a first set of functional devices for performing target vehicle functions, and a second set of functional devices for performing the target vehicle functions. Moreover, the combination of the first set of functional devices and the second set of functional devices is also used to perform the target vehicle functions. The power battery, the on-vehicle charger, and the power isolator are electrically connected in sequence to form a first power grid. The power battery, the storage battery, and the power isolator are electrically connected in sequence to form a second power grid. And the power battery, the on-vehicle charger, the power isolator, and the storage battery are connected in series to form a loop. The on-vehicle charger is electrically connected to the first set of functional devices. The storage battery is electrically connected to the second set of functional devices. One end of the power isolator is connected between the on-vehicle charger and the first set of functional devices, and the other end of the power isolator is connected between the storage battery and the second set of functional devices. Among them, the power isolator remains conducting when no abnormalities are detected in the first power grid and the second power grid, so that the power battery charges the storage battery through the on-vehicle charger and supplies power to the first set of functional devices and the second set of functional devices. The power isolator is used to perform a disconnection operation when an abnormality is detected in the first power grid. The power battery is used to charge the storage battery at a preset charging power and supply power to the second set of functional devices when an abnormality is detected in the first power grid. The power isolator is used to perform a disconnection operation when an abnormality is detected in the second power grid, and the power battery keeps charging the first set of functional devices through the on-vehicle charger.

2. The system according to claim 1, wherein The first set of functional devices includes, in the autonomous driving domain, an autonomous driving domain controller for realizing the scene perception sub-function in the automatic parking function, a camera, a millimeter-wave radar in front of the electric vehicle, a millimeter-wave radar at the left rear corner of the electric vehicle, a millimeter-wave radar at the right rear corner of the electric vehicle, a lidar in front of the electric vehicle, a lidar on the left side of the electric vehicle, a lidar on the right side of the electric vehicle, and an ultrasonic radar provided on the electric vehicle. The second set of functional devices includes, in the autonomous driving domain, an autonomous driving domain controller for realizing the scene perception sub-function in the automatic parking function, a camera, a millimeter-wave radar in the left front of the electric vehicle, a millimeter-wave radar in the right front of the electric vehicle, and a lidar directly behind the electric vehicle.

3. The system according to claim 1, wherein The first set of functional devices includes, in the chassis domain, a parking controller for realizing the braking and steering sub-functions in the automatic parking function, a redundant wheel speed control unit, and a steering controller. The second set of functional devices includes, in the chassis domain, a parking controller for realizing the braking and steering sub-functions in the automatic parking function, a braking controller, and a redundant steering angle control unit.

4. The system according to claim 1, characterized in that, The first set of functional devices includes the right front headlight, the right rear headlight, and the right rear fixed side headlight on the cockpit domain for implementing the function of controlling external vehicle lights. The second set of functional devices includes the left front headlight and the rear tailgate headlight on the cockpit domain for implementing the function of controlling external vehicle lights.

5. The system according to claim 1, wherein The first set of functional devices includes a seat belt vibration module on the cockpit domain for implementing the function of prompting the driver to take over the electric vehicle, and a light strip provided on the steering wheel of the electric vehicle. The second set of functional devices includes a cockpit controller, an instrument panel, a central control screen, and a speaker on the cockpit domain for implementing the function of prompting the driver to take over the electric vehicle.

6. The system according to claim 1, wherein The on-vehicle charger is also electrically connected to a thermal management controller and an electric fan.

7. The system according to claim 1, wherein The on-vehicle charger is also electrically connected to a battery management system.

8. The system according to claim 1, characterized in that, The power isolator is also connected in parallel with a vehicle controller and a body controller.

9. The system according to claim 1, wherein The on-vehicle charger is also electrically connected to a front motor controller of the vehicle, and the power battery and the storage battery are also electrically connected to a rear motor controller. Alternatively, the on-vehicle charger is also electrically connected to a rear motor controller of the vehicle, and the power battery and the storage battery are also electrically connected to a front motor controller.

10. The system according to claim 1, wherein The power battery and the storage battery are also electrically connected to a rear door control module of the vehicle, four side door control modules, and an airbag controller.

11. The system according to claim 1, wherein The storage battery is used to supply power to the second set of functional devices when the electric vehicle is in an off state or a sleep state.

12. The system according to claim 11, wherein The combined power consumption of the second set of functional devices is lower than that of the first set of functional devices.

13. A power redundancy method for an electric vehicle, characterized in that, For a power redundancy system of an electric vehicle according to any one of claims 1-12, the method includes: The power isolator remains conductive when no abnormalities are detected in the first power grid and the second power grid, so that the power battery charges the storage battery through the on-vehicle charger and supplies power to the first set of functional devices and the second set of functional devices. The power isolator performs a disconnection operation when an abnormality is detected in the first power grid. When an abnormality is detected in the first power grid, the power battery charges the storage battery at a preset charging power and supplies power to the second set of functional devices. The power isolator performs a disconnection operation when an abnormality is detected in the second power grid. The power battery keeps charging the first set of functional devices through the on-vehicle charger.

14. The method according to claim 13, characterized in that The method further includes: When the electric vehicle is in an off state or a sleep state, the storage battery supplies power to the second set of functional devices.

15. An electric vehicle, characterized in that, A power redundancy system of an electric vehicle according to any one of claims 1-12.

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