Automobile redundant power supply system and automobile

Abstract

The utility model relates to an automobile redundant power supply system and an automobile, the system comprises a first power supply module, a second power supply module, a first power supply interface, a second power supply interface, a power supply switch, a first automobile load and a second automobile load, the second power supply module is connected with the second power supply interface through a second power supply line, one end of the power supply switch is connected with the first power supply line, and the other end of the power supply switch is connected with the second power supply line and used for being disconnected when the first power supply line breaks down so as to supply power to a second automobile load through the second power supply module. Or the first power supply module is used for being disconnected when the second power supply circuit breaks down so as to supply power to the first automobile load through the first power supply module; the first power supply module and the second power supply module respectively supply power through the independent power supply lines and the independent power supply interfaces, and the power supply requirement is met to a greater extent.

Description

Technical Field

[0001] This application relates to the field of automotive power supply technology, and more particularly to an automotive redundant power supply system and an automotive. Background Technology

[0002] Currently, due to the requirements of new energy vehicles in terms of power safety and intelligent driving, redundant power systems and braking systems need to be set up inside the vehicle. Both the power system and the braking system need to be powered by redundant low-voltage power supplies so that the vehicle can still maintain braking and power output functions even if a single low-voltage power supply fails.

[0003] In related technologies, a low-voltage system such as 12V or 24V is provided by a storage battery to supply low-voltage power to the components in the vehicle and power system. After the vehicle is connected to high-voltage electricity, the power battery provides energy to the DC-DC conversion module, which converts the high-voltage electricity provided by the power battery into 12V or 24V low-voltage electricity to charge the storage battery. At the same time, the 12V or 24V low-voltage electricity supplies power to the redundant power system and braking system inside the vehicle.

[0004] However, because the DC-DC converter and battery share a single power supply line to power the redundant powertrain and braking systems within the vehicle, a failure in this power supply line prevents low-voltage power from being supplied to the components in the braking and powertrain systems via the DC-DC converter or battery. This fails to meet the power safety and intelligent driving requirements of new energy vehicles. Therefore, the current redundant power supply system in automobiles needs to be improved. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, this application provides a redundant power supply system for automobiles and an automobile to solve the above-mentioned technical problems.

[0006] This application provides a redundant power supply system for automobiles, the system comprising: a first power supply module, a second power supply module, a first power supply interface, a second power supply interface, a power supply switch, a first vehicle load, and a second vehicle load; the first power supply module is connected to the first power supply interface via a first power supply line, and is used to supply power to the first vehicle load through the first power supply line and the first power supply interface; the second power supply module is connected to the second power supply interface via a second power supply line, and is used to supply power to the second vehicle load through the second power supply line; one end of the power supply switch is connected to the first power supply line, and the other end of the power supply switch is connected to the second power supply line, and is used to disconnect when the first power supply line fails, so that the second vehicle load is supplied power through the second power supply module; or, it is used to disconnect when the second power supply line fails, so that the first vehicle load is supplied power through the first power supply module.

[0007] In one embodiment of this application, the first vehicle load is at least one of the braking system, steering system, and high-voltage components in the power domain, and the remaining loads are the second vehicle loads.

[0008] In one embodiment of this application, the power supply switch is further configured to close when the first power supply line is not faulty and the second power supply line is not faulty, so as to supply power to the first vehicle load and the second vehicle load through the second power supply module, and to charge the first power supply module through the second power supply module.

[0009] In one embodiment of this application, the first power supply line includes: a charging line and an output line; one end of the output line is connected to the charging and discharging interface of the first power supply module, and the other end of the output line is connected to the first power supply interface; one end of the charging line is connected to the power supply switch, and the other end of the charging line is connected to the charging and discharging interface of the first power supply module.

[0010] In one embodiment of this application, a protector for short-circuit protection or overload protection is provided on the second power supply line; and / or, a protector for short-circuit protection or overload protection is provided on the charging line; and / or, a protector for short-circuit protection or overload protection is provided on the output line.

[0011] In one embodiment of this application, a detector for detecting line faults is provided on the second power supply line; and / or, a detector for detecting line faults is provided on the charging line; and / or, a detector for detecting line faults is provided on the output line.

[0012] In one embodiment of this application, the second power supply module includes: a power battery and a DC-DC converter; the input terminal of the DC-DC converter is connected to the power battery, and the output terminal of the DC-DC converter is connected to the second power supply line.

[0013] According to one aspect of the embodiments of this application, an automobile is provided, the automobile including the automobile redundant power supply system as described above.

[0014] The beneficial effects of this application are as follows: By setting up a first power supply module and a second power supply module, and when the first power supply line fails, the power switch is disconnected, and power is supplied to the second vehicle load through the second power supply line and the second power supply interface. When the second power supply line fails, the power switch is disconnected, and power is supplied to the first vehicle load through the first power supply line and the first power supply interface. This achieves that the first power supply module supplies power to the first vehicle load through an independent power supply line and an independent power supply interface, and the second power supply module supplies power to the second vehicle load through an independent power supply line and an independent power supply interface. This avoids the situation where the first power supply module and the second power supply module share the same power supply line and the same power supply interface to supply power to the first or second vehicle load, and when the shared power supply line or the shared power supply interface fails, the first power supply module cannot supply power to the first vehicle load and the second power supply module cannot supply power to the second vehicle load. This better meets the power supply needs of the first or second vehicle load, and thus meets the needs of new energy vehicles in terms of power safety and intelligent driving.

[0015] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0017] Figure 1 This is a schematic diagram of a low-voltage power supply system in related technologies;

[0018] Figure 2 This is a schematic diagram of an automotive redundant power supply system illustrated in an exemplary embodiment of this application. Detailed Implementation

[0019] The embodiments of this application will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be understood that the preferred embodiments are only for illustrating this application and are not intended to limit the scope of protection of this application.

[0020] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. Therefore, the drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0021] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present application. However, it will be apparent to those skilled in the art that embodiments of the present application may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present application.

[0022] Figure 1 This is a schematic diagram of a low-voltage power supply system in related technologies, such as... Figure 1 As shown, the low-voltage power supply system includes: a power battery, a DC-DC (Direct Current to Direct Current, DCDC) controller, an electrical load, a storage battery, a charging line, and an output line. The DC-DC controller includes an electronic control unit and a DC-DC (Direct Current to Direct Current, DCDC) converter. The storage battery is connected to the electrical load through the output line. The power battery is connected to the electrical load in sequence through the DC-DC converter, the charging line, and the output line. The charging line is connected to the charging and discharging interface of the storage battery.

[0023] exist Figure 1 In this system, the storage battery provides 12V or 24V power to the electrical loads. After the vehicle is connected to high-voltage electricity, the power battery provides energy to the DC-DC controller, which converts the output voltage of the power battery into 12V or 24V low-voltage electricity to charge the storage battery. At the same time, it also supplies power to the electrical loads. However, since the storage battery and the power battery share the same power supply line when supplying power to the electrical loads, when this power supply line fails, neither the storage battery nor the power battery can supply power to the electrical loads, thus failing to meet the requirements of intelligent driving and power safety.

[0024] In one embodiment of this application, the vehicle redundant power supply system includes: a first power supply module, a second power supply module, a first power supply interface, a second power supply interface, a power supply switch, a first vehicle load, and a second vehicle load; the first power supply module is connected to the first power supply interface via a first power supply line, and is used to supply power to the first vehicle load through the first power supply line and the first power supply interface; the second power supply module is connected to the second power supply interface via a second power supply line, and is used to supply power to the second vehicle load through the second power supply line and the second power supply interface; one end of the power supply switch is connected to the first power supply line, and the other end of the power supply switch is connected to the second power supply line, and is used to disconnect when the first power supply line fails, so that the second vehicle load can be supplied power through the second power supply module; or, it is used to disconnect when the second power supply line fails, so that the first vehicle load can be supplied power through the first power supply module.

[0025] In this embodiment, a fault in the first power supply line refers to the voltage of the first power supply line being outside the preset voltage range, and / or the current of the first power supply line being outside the preset current range; a fault in the second power supply line refers to the voltage of the second power supply line being outside the preset voltage range, and / or the current of the second power supply line being outside the preset current range. The preset current range and preset voltage range can be set according to actual conditions and are not specifically limited here. The first power supply module is selected from batteries, etc.

[0026] In this embodiment, by setting up a first power supply module and a second power supply module, and when the first power supply line fails, the power switch is disconnected, and power is supplied to the second vehicle load through the second power supply line and the second power supply interface. When the second power supply line fails, the power switch is disconnected, and power is supplied to the first vehicle load through the first power supply line and the first power supply interface. This achieves the first power supply module supplying power to the first vehicle load through an independent power supply line and an independent power supply interface, and the second power supply module supplying power to the second vehicle load through an independent power supply line and an independent power supply interface. This avoids the situation where the first power supply module and the second power supply module share the same power supply line and the same power supply interface to supply power to the first or second vehicle load, and when the shared power supply line or the shared power supply interface fails, the first power supply module cannot supply power to the first vehicle load and the second power supply module cannot supply power to the second vehicle load. This better meets the power supply needs of the first or second vehicle load, and thus meets the needs of new energy vehicles in terms of power safety and intelligent driving.

[0027] In one embodiment of this application, the first vehicle load is at least one of the braking system, steering system and power domain high-voltage components, and the remaining loads are the second vehicle loads.

[0028] In this embodiment, the high-voltage components in the power domain include a vehicle control unit (VCU), a microcontroller unit (MCU), a DC-DC controller, and a battery management system (BMS).

[0029] In one embodiment of this application, the power supply switch is further configured to close when the first power supply line is not faulty and the second power supply line is not faulty, so as to supply power to the first vehicle load and the second vehicle load through the second power supply module, and to charge the first power supply module through the second power supply module.

[0030] In this embodiment, the power supply switch has automatic closing and automatic opening functions. For example, when neither the first nor the second power supply line is faulty, the power supply switch closes, connecting the first and second power supply lines, enabling the second power supply module to charge the first power supply module. Simultaneously, the second power supply module supplies power to both the first and second vehicle loads. When the first power supply line is faulty but the second power supply line is not, the power supply switch opens, disconnecting the first and second power supply lines, making them isolated and independent. In this case, even if the first power supply line fails, it will not affect the second power supply line, and the second power supply module and the second power supply line can still supply power to the second vehicle load, better meeting the power supply needs of the vehicle load and thus satisfying the power safety requirements of new energy vehicles. In addition to meeting the needs of intelligent driving, when the first power supply line is functioning normally and the second power supply line is faulty, the power supply switch is disconnected, severing the connection between the first and second power supply lines, making them isolated and independent lines. In this case, even if the second power supply line fails, it will not affect the first power supply line. The first power supply module and the first power supply line can still supply power to the first vehicle load, thus better meeting the power supply needs of the vehicle load and meeting the needs of new energy vehicles in terms of power safety and intelligent driving. When the first power supply line fails and the second power supply line fails, the power supply switch is disconnected, severing the connection between the first and second power supply lines, making them isolated and independent lines, thus preventing the situation from worsening due to a fault in one power supply line causing a fault in the other.

[0031] In this embodiment, the power supply switch can be an Automatic Procedure Start-up / Shut-down (APS) switch, or other switches with automatic closing and automatic disconnection functions. The APS switch performs automatic closing or automatic disconnection actions according to the control strategy of the APS switch controller. The control strategy of the APS switch controller is determined based on the fault conditions of the first power supply line and the second power supply line.

[0032] In one embodiment of this application, the first power supply line includes: a charging line and an output line; one end of the output line is connected to the charging and discharging interface of the first power supply module, and the other end of the output line is connected to the first power supply interface; one end of the charging line is connected to the power supply switch, and the other end of the charging line is connected to the charging and discharging interface of the first power supply module.

[0033] In this embodiment, one end of the output line is connected to the charging / discharging interface of the first power supply module, and the other end of the output line is connected to the first power supply interface. One end of the charging line is connected to the power switch, and the other end of the charging line is connected to the charging / discharging interface of the first power supply module. This is used to control the power switch to close when the second power supply line, charging line, and output line are all functioning correctly, connecting the second and first power supply modules. This allows the second power supply module to charge the first power supply module and simultaneously supply power to the first and second vehicle loads. Conversely, when the second power supply line fails, but the charging line and output line are functioning correctly, the power switch is opened, disconnecting the second and charging lines. The second power supply module stops charging the first power supply module, and the second and output lines are isolated and independent. Even if the second power supply line fails, the first power supply module can still supply power to the first vehicle load through the output line and the first power supply interface. Finally, this is used when the second power supply line, charging line, and output line are functioning correctly. In the event of a fault, where the second power supply line is not faulty, the charging line is not faulty, but the output line is faulty, or the second power supply line is not faulty, the output line is faulty, and the charging line is faulty, the power supply switch is disconnected, cutting off the connection between the second power supply line and the charging line. The second power supply module stops charging the first power supply module, and the second power supply line and the output line are isolated and independent of each other. Even if the charging line or the output line is faulty, it will not affect the second power supply module supplying power to the second vehicle load through the second power supply line and the second power supply interface. This is used to disconnect the power supply switch when the second power supply line, the charging line, and the output line are faulty, or the second power supply line, the charging line, and the output line are not faulty, or the second power supply line, the charging line, and the output line are not faulty, cutting off the connection between the second power supply line and the charging line. The second power supply module stops charging the first power supply module, and the second power supply line and the output line are isolated and independent of each other, preventing the situation where a fault in one power supply line causes a fault in the other power supply line to worsen.

[0034] In one embodiment of this application, a protector for short-circuit protection or overload protection is provided on the second power supply line; and / or, a protector for short-circuit protection or overload protection is provided on the charging line; and / or, a protector for short-circuit protection or overload protection is provided on the output line.

[0035] In this embodiment, the protectors include short-circuit protectors, overload protectors, overvoltage protectors, and low-voltage fuses. The operating voltage of the low-voltage fuses is 32V, 125V, or 250V, etc., and needs to be selected according to the actual usage environment. By setting up protectors, the second power supply line, charging line, and output line are protected, ensuring the safety of the second power supply line, charging line, and output line.

[0036] In one embodiment of this application, a detector for detecting line faults is provided on the second power supply line; and / or, a detector for detecting line faults is provided on the charging line; and / or, a detector for detecting line faults is provided on the output line.

[0037] In this embodiment, the detectors include current anomaly detectors, voltage anomaly detectors, etc. The current anomaly detectors detect the current in the second power supply line, charging line, and output line. If the current in the second power supply line exceeds a preset current range, the current in the charging line exceeds a preset current range, or the current in the output line exceeds a preset current range, then the corresponding line is determined to be faulty. Similarly, the voltage anomaly detectors detect the voltage in the second power supply line, charging line, and output line. If the voltage in the second power supply line exceeds a preset voltage range, the voltage in the charging line exceeds a preset voltage range, or the voltage in the output line exceeds a preset voltage range, then the corresponding line is determined to be faulty.

[0038] In one embodiment of this application, the second power supply module includes: a power battery and a DC-DC converter; the input terminal of the DC-DC converter is connected to the power battery, and the output terminal of the DC-DC converter is connected to the second power supply line.

[0039] In this embodiment, when the second power supply line is not faulty, the DC-DC converter will step down the output voltage of the power battery and supply power to the second vehicle load through the second power supply line and the second power supply interface. The voltage after step-down conversion can be 12V or 24V, etc.

[0040] Embodiments of this application also provide an automobile including a redundant power supply system as described in the above embodiments.

[0041] Figure 2 This is a schematic diagram of an automotive redundant power supply system illustrated in an exemplary embodiment of this application.

[0042] Reference Figure 2As shown, the vehicle redundant power supply system includes a power battery, a DC-DC controller, a second power supply line, a second vehicle load, a storage battery, a charging line, an output line, and a first vehicle load. The DC-DC controller includes an electronic control unit, a DC-DC converter, and a power switch. The storage battery is connected to the first vehicle load through the output line. The power battery is connected to the second vehicle load in sequence through the DC-DC converter and the second power supply line. The second power supply line is connected to the charging line through the power switch. The charging line is connected to the charging and discharging interface of the storage battery.

[0043] In this embodiment, the output voltage of the power battery is converted to 12V or 24V by the DC-DC converter. When the second power supply line is not faulty, it provides low-voltage power to the second vehicle load. During the process of providing low-voltage power to the second vehicle load through the second power supply line, the APS switch controller uses an overcurrent detection method to detect in real time whether the current in the second power supply line exceeds the preset current range, whether the current in the charging line exceeds the preset current range, and whether the current in the output line exceeds the preset current range. When it is detected that the current in the second power supply line exceeds the preset current range, while the current in the charging line and the current in the output line do not exceed the preset current range, the APS switch controller immediately controls the APS switch to open, thereby cutting off the connection between the second power supply line and the charging line. The DC-DC converter stops outputting because it detects a short circuit in the second power supply line. At this time, the battery and the output line provide a low-voltage 12V or 24V power supply voltage to the first vehicle load.

[0044] In this embodiment, during the process of providing a low-voltage 12V or 24V power supply to the first vehicle load through the battery and output line, the APS switch controller uses an overcurrent detection method to detect in real time whether the current in the charging line, the second power supply line, and the output line exceeds the preset current range. When it is detected that the current in the charging line or the output line exceeds the preset current range, but the current in the second power supply line does not exceed the preset current range, the APS switch controller immediately controls the APS switch to open, thereby cutting off the connection between the second power supply line and the charging line. At the same time, the detection unit in the battery detects that the current in the charging line or the output line exceeds the preset current range, triggering overload protection and stopping the output. At this time, the DC-DC converter provides a 12V or 24V voltage to power the second vehicle load.

[0045] In this embodiment, the electronic control unit is used to control the DC-DC converter to perform high-voltage or low-voltage conversion on the input voltage, and to control the DC-DC converter to output voltage or stop voltage output according to the overcurrent condition of the second power supply line. The first vehicle load has a first power supply interface, and the second vehicle load has a second power supply interface.

[0046] In this embodiment, by setting a power supply switch, when the second power supply line, the charging line, and the output line are all functioning correctly, the power supply switch is closed to connect the second power supply line to the battery via the charging line. This enables the power supply to the first and second vehicle loads through the power battery, the DC-DC converter, and the second power supply line, while simultaneously charging the battery through the power battery, the DC-DC converter, the second power supply line, and the charging line.

[0047] In this embodiment, when the second power supply line, the charging line, or the output line fails, the power supply switch is turned off to disconnect the second power supply line from the charging line. This disconnects the connection with the faulty line in the event of a power supply failure (short circuit, etc.), ensuring the safety of electrical appliances and the vehicle, and further protecting the safety of passengers and prevents more serious accidents and injuries. At the same time, it can also ensure the normal power supply of non-faulty lines, thereby ensuring driving safety and meeting the vehicle's power supply needs to a greater extent.

[0048] It should be noted that the automobile provided in the above embodiments and the automobile redundant power supply system provided in the above embodiments belong to the same concept. The specific operation methods of each module and unit have been described in detail in the system embodiments and will not be repeated here. In practical applications, the automobile provided in the above embodiments can allocate the above functions to different functional modules as needed, that is, divide the internal structure of the automobile into different functional modules to complete all or part of the functions described above. This is not a limitation here.

[0049] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. An automotive redundant power supply system, characterized by, The system comprises: A first power supply module, a second power supply module, a first power supply interface, a second power supply interface, a power supply switch, a first automobile load and a second automobile load; The first power supply module is connected with the first power supply interface through a first power supply line, and is configured to supply power to the first automobile load through the first power supply line and the first power supply interface; The second power supply module is connected with the second power supply interface through a second power supply line, and is configured to supply power to the second automobile load through the second power supply line and the second power supply interface; One end of the power supply switch is connected with the first power supply line, and the other end of the power supply switch is connected with the second power supply line, and is configured to be disconnected when the first power supply line fails, so as to supply power to the second automobile load through the second power supply module; or, is configured to be disconnected when the second power supply line fails, so as to supply power to the first automobile load through the first power supply module.

2. The automotive redundant power supply system of claim 1, wherein, The first automobile load is at least one load in a brake system, a steering system and a high-voltage component in a power domain, and the remaining loads are the second automobile load.

3. The automotive redundant power supply system of claim 1, wherein, The power supply switch is also configured to be closed when the first power supply line does not fail and the second power supply line does not fail, so as to supply power to the first automobile load and the second automobile load through the second power supply module, and charge the first power supply module through the second power supply module.

4. The automotive redundant power supply system according to any one of claims 1 to 3, characterized in that, The first power supply line comprises: A charging line and an output line; One end of the output line is connected with a charge-discharge interface of the first power supply module, and the other end of the output line is connected with the first power supply interface; One end of the charging line is connected with the power supply switch, and the other end of the charging line is connected with the charge-discharge interface of the first power supply module.

5. The automotive redundant power supply system of claim 4, wherein, A protector for short-circuit protection or overload protection is arranged on the second power supply line; And / or, a protector for short-circuit protection or overload protection is arranged on the charging line; And / or, a protector for short-circuit protection or overload protection is arranged on the output line.

6. The automotive redundant power supply system of claim 4, wherein, A detector for fault detection is arranged on the second power supply line; And / or, a detector for fault detection is arranged on the charging line; And / or, a detector for fault detection is arranged on the output line.

7. The automotive redundant power supply system of any one of claims 1-3, wherein, The second power supply module comprises: A power battery and a DC-DC converter; An input end of the DC-DC converter is connected with the power battery, and an output end of the DC-DC converter is connected with the second power supply line.

8. An automobile characterized by comprising: An automobile redundant power supply system as claimed in any one of claims 1 to 7 is included.

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