Automobile redundancy isolation power supply system and automobile

Abstract

The utility model relates to an automobile redundancy isolation power supply system and an automobile, the system comprises a first power supply subsystem, a second power supply subsystem, a power supply switch, a first current isolation unit and a second current isolation unit, the first power supply subsystem is connected with an automobile load through the first current isolation unit; the second power supply subsystem is connected with an automobile load through a second current isolation unit, one end of the power supply switch is connected with the first power supply subsystem, the other end of the power supply switch is connected with the second power supply subsystem, and when the first power supply subsystem breaks down, the power supply switch is switched off, and the first power supply subsystem stops supplying power; the second power supply subsystem supplies power to an automobile load; when the second power supply subsystem breaks down, the power supply switch is switched off, the second power supply subsystem stops supplying power, and power is supplied to the automobile load through the first power supply subsystem; according to the invention, the current flows back to the power supply subsystem with the fault to cause short circuit of the whole vehicle isolation power supply system, and the safety is improved.

Description

Technical Field

[0001] This application relates to the field of automotive power supply technology, and in particular to an automotive redundant isolation 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 can lead to several problems. First, internal currents from the redundant powertrain and braking systems can flow back into the faulty line, compromising the vehicle's electrical safety. Second, a failure in this power supply line also prevents the DC-DC converter or battery from providing low-voltage power to the braking and powertrain components, thus failing to meet the power safety and intelligent driving requirements of new energy vehicles. Therefore, improvements to the current redundant power supply system in automobiles are necessary. Utility Model Content

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

[0006] This application provides a redundant isolated power supply system for automobiles. The system includes: a first power supply system, a second power supply system, a power supply switch, a first current isolation unit, and a second current isolation unit. The first power supply system is connected to the vehicle load through the first current isolation unit, and the second power supply system is connected to the vehicle load through the second current isolation unit. One end of the power supply switch is connected to the first power supply system, and the other end of the power supply switch is connected to the second power supply system. When the first power supply system fails, the power supply switch is disconnected, and the first power supply system stops supplying power, so that the vehicle load is supplied only through the second power supply system. When the second power supply system fails, the power supply switch is disconnected, and the second power supply system stops supplying power, so that the vehicle load is supplied only through the first power supply system. The first current isolation unit is in a conducting state when the first power supply system supplies power to the vehicle load, and in a cut-off state when the vehicle load is supplied only through the second power supply system. The second current isolation unit is in a conducting state when the second power supply system supplies power to the vehicle load, and in a cut-off state when the vehicle load is supplied only through the first power supply system.

[0007] In one embodiment of this application, the first current isolation unit includes a first diode, and the second current isolation unit includes a second diode.

[0008] In one embodiment of this application, the vehicle load has a first power supply interface and a second power supply interface, the first power supply interface being connected to the negative terminal of the first diode, and the second power supply interface being connected to the negative terminal of the second diode; the first power supply system includes a first power supply module and a first power supply line, one end of the first power supply line being connected to the first power supply module, and the other end of the first power supply line being connected to the positive terminal of the first diode; the second power supply system includes a second power supply module and a second power supply line, one end of the second power supply line being connected to the second power supply module, and the other end of the second power supply line being connected to the positive terminal of the second diode.

[0009] In one embodiment of this application, 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. When the first power supply line fails, the power supply switch is opened, and the first power supply module stops supplying power, so that the vehicle load is powered only through the second power supply system. When the second power supply line fails, the power supply switch is opened, and the second power supply module stops supplying power, so that the vehicle load is powered only through the first power supply system. When neither the first nor the second power supply line fails, the power supply switch is closed, so that the vehicle load is powered through the second power supply module, and the first power supply module is charged through the second power supply module. The first diode is in a conducting state when the first power supply system supplies power to the vehicle load, and in a cut-off state when the vehicle load is powered only through the second power supply system. The second diode is in a conducting state when the second power supply system supplies power to the vehicle load, and in a cut-off state when the vehicle load is powered only through the first power supply system.

[0010] 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.

[0011] 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 positive terminal of the first diode; 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.

[0012] 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.

[0013] 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.

[0014] According to one aspect of the embodiments of this application, a vehicle is provided, the vehicle including the vehicle redundant isolated power supply system as described above.

[0015] The beneficial effects of this application are as follows: When the first power supply system fails, the power switch is disconnected, and the vehicle load is powered only through the second power supply system, the second current isolation unit is turned on while the first current isolation unit is turned off. The first current isolation unit isolates the first and second power supply systems, preventing current from the second power supply system from flowing back into the first power supply system and causing a short circuit in the vehicle's isolated power supply system, thus improving the safety of the vehicle's isolated power supply system. Similarly, when the second power supply system fails, the power switch is disconnected, and the vehicle load is powered only through the first power supply system, the first current isolation unit is turned on while the second current isolation unit is turned off. The current isolation unit isolates the first and second power supply systems, preventing current from flowing back from the first power supply system to the second power supply system and causing a short circuit in the vehicle's isolated power supply system, thus improving the safety of the vehicle's isolated power supply system. In addition, when either the first or second power supply system fails, the power switch is disconnected, making the first and second power supply systems mutually isolated and independent. Even if one power supply system fails, it will not affect the other power supply system's ability to supply power to the vehicle's load, thus better meeting the power supply needs of the vehicle's load and meeting the requirements of new energy vehicles in terms of power safety and intelligent driving.

[0016] 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

[0017] 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:

[0018] Figure 1 This is a schematic diagram of a low-voltage power supply system in related technologies;

[0019] Figure 2 This is a schematic diagram of an automotive redundant isolated power supply system, as illustrated in an exemplary embodiment of this application. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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, a vehicle 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 vehicle load through the output line. The power battery is connected to the vehicle 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.

[0024] exist Figure 1 In this system, the storage battery provides 12V or 24V power to the vehicle's loads. After the vehicle is powered by high voltage, the power battery provides energy to the DC-DC controller, which converts the power battery's output voltage into 12V or 24V low-voltage electricity to charge the storage battery. At the same time, it also supplies power to the vehicle's loads. However, since the storage battery and the power battery share the same power supply line when supplying power to the vehicle's loads, if this power supply line fails, neither the storage battery nor the power battery can supply power to the vehicle's loads, thus failing to meet the requirements of intelligent driving and power safety.

[0025] In one embodiment of this application, the automotive redundant isolated power supply system includes: a first power supply system, a second power supply system, a power supply switch, a first current isolation unit, and a second current isolation unit; the first power supply system is connected to the automotive load through the first current isolation unit, and the second power supply system is connected to the automotive load through the second current isolation unit; one end of the power supply switch is connected to the first power supply system, and the other end of the power supply switch is connected to the second power supply system; when the first power supply system fails, the power supply switch is disconnected, and the first power supply system stops supplying power, so that the automotive load is supplied only through the second power supply system; when the second power supply system fails, the power supply switch is disconnected, and the second power supply system stops supplying power, so that the automotive load is supplied only through the first power supply system; the first current isolation unit is in a conducting state when the first power supply system supplies power to the automotive load, and in a cut-off state when the automotive load is supplied only through the second power supply system; the second current isolation unit is in a conducting state when the second power supply system supplies power to the automotive load, and in a cut-off state when the automotive load is supplied only through the first power supply system.

[0026] In this embodiment, the first power supply system includes a first power supply module and a first power supply line. Whether the first power supply system malfunctions is characterized by whether the first power supply line malfunctions. For example, the criteria for determining a malfunction in the first power supply line are that its voltage is outside a preset voltage range and / or its current is outside a preset current range. The second power supply system includes a second power supply module and a second power supply line. Whether the second power supply system malfunctions is characterized by whether the second power supply line malfunctions. The criteria for determining a malfunction in the second power supply line are that its voltage is outside a preset voltage range and / or its current is outside a preset current range. Both the preset current range and the preset voltage range can be set according to actual conditions and are not specifically limited here. The first power supply module may be a battery, etc.

[0027] In this embodiment, whether the first power supply system has failed can also be characterized by whether the first power supply line has failed and whether the first power supply module has failed. That is, if at least one of the first power supply line and the first power supply module fails, the first power supply system is determined to have failed. Here, the method for determining whether the first power supply module has failed is not specifically limited. Similarly, whether the second power supply system has failed can also be characterized by whether the second power supply line and the second power supply module have failed. That is, if at least one of the second power supply line and the second power supply module fails, the second power supply system is determined to have failed. Here, the method for determining whether the second power supply module has failed is not specifically limited.

[0028] In this embodiment, the vehicle load includes components that require power supply in the braking system (e.g., brake controller), components that require power supply in the steering system (e.g., steering controller), and components that require power supply in the battery management system, such as the battery management system controller (BMS controller), vehicle control unit (VCU), microcontroller unit (MCU), DC-DC controller, etc.

[0029] In this embodiment, when the first power supply system fails, the power switch is disconnected, and the vehicle load is powered only through the second power supply system, the second current isolation unit is turned on and the first current isolation unit is turned off. The first current isolation unit isolates the first and second power supply systems, preventing current from the second power supply system from flowing back into the first power supply system and causing a short circuit in the entire vehicle's isolated power supply system, thus improving the safety of the entire vehicle's isolated power supply system. Similarly, when the second power supply system fails, the power switch is disconnected, and the vehicle load is powered only through the first power supply system, the first current isolation unit is turned on and the second current isolation unit is turned off. The isolation unit serves to isolate the first and second power supply systems, preventing current from flowing back from the first power supply system to the second power supply system and causing a short circuit in the vehicle's isolated power supply system, thus improving the safety of the vehicle's isolated power supply system. In addition, when either the first or second power supply system fails, the power switch is disconnected, making the first and second power supply systems mutually isolated and independent. Even if one power supply system fails, it will not affect the other power supply system's ability to supply power to the vehicle's load, thus better meeting the power supply needs of the vehicle's load and meeting the requirements of new energy vehicles in terms of power safety and intelligent driving.

[0030] In one embodiment of this application, the first current isolation unit includes a first diode, and the second current isolation unit includes a second diode.

[0031] In this embodiment, when the first power supply system fails, the power switch is disconnected, and the vehicle load is powered only through the second power supply system, the first diode is in the off state because its output voltage is less than the forward threshold voltage of the first diode, while the second diode is in the on state because its output voltage is greater than the forward threshold voltage of the second diode. The first diode isolates the first and second power supply systems, preventing current from flowing back from the second power supply system to the first power supply system and causing a short circuit in the entire vehicle's isolated power supply system, thus improving the safety of the entire vehicle's isolated power supply system. Similarly, when the second power supply system fails, the power switch is disconnected, and the vehicle load is powered only through the first power supply system, the second diode is in the off state because its output voltage is less than the forward threshold voltage of the second diode, while the first diode is in the on state because its output voltage is greater than the forward threshold voltage of the first power supply system. The second diode isolates the first and second power supply systems, preventing current from flowing back from the first power supply system to the second power supply system and causing a short circuit in the entire vehicle's isolated power supply system, thus improving the safety of the entire vehicle's isolated power supply system.

[0032] In one embodiment of this application, the vehicle load has a first power supply interface and a second power supply interface. The first power supply interface is connected to the negative terminal of a first diode, and the second power supply interface is connected to the negative terminal of a second diode. The first power supply system includes a first power supply module and a first power supply line. One end of the first power supply line is connected to the first power supply module, and the other end of the first power supply line is connected to the positive terminal of the first diode. The second power supply system includes a second power supply module and a second power supply line. One end of the second power supply line is connected to the second power supply module, and the other end of the second power supply line is connected to the positive terminal of the second diode.

[0033] In this embodiment, both the first and second power supply systems have independent power supply modules, independent power supply lines, and independent power supply interfaces. When one power supply system fails, the power switch is disconnected, and the vehicle load is powered through the other, unaffected power supply system. This avoids the situation where the first and second power supply systems share the same power supply line and the same power supply interface to power the vehicle load, and neither system can supply power to the vehicle load when the shared power supply line or interface fails. This better meets the power supply needs of the vehicle load and thus satisfies the requirements of new energy vehicles in terms of power safety and intelligent driving.

[0034] In one embodiment of this application, one end of a power supply switch is connected to a first power supply line, and the other end of the power supply switch is connected to a second power supply line. When the first power supply line fails, the power supply switch is opened, and the first power supply module stops supplying power, so that the vehicle load is powered only through the second power supply system. When the second power supply line fails, the power supply switch is opened, and the second power supply module stops supplying power, so that the vehicle load is powered only through the first power supply system. When neither the first nor the second power supply line fails, the power supply switch is closed, so that the vehicle load is powered through the second power supply module, and the first power supply module is charged through the second power supply module. The first diode is in a conducting state when the first power supply system supplies power to the vehicle load, and in a cut-off state when the vehicle load is powered only through the second power supply system. The second diode is in a conducting state when the second power supply system supplies power to the vehicle load, and in a cut-off state when the vehicle load is powered only through the first power supply system.

[0035] In one embodiment of this application, when a fault occurs in the first power supply line, the power switch is disconnected, and the vehicle load is powered only through the second power supply system, the second diode conducts while the first diode is cut off. The first diode isolates the first and second power supply lines, preventing current from the second power supply line from flowing back into the first power supply line and causing a short circuit in the vehicle's isolated power supply system, thus improving the safety of the vehicle's isolated power supply system. Similarly, when a fault occurs in the second power supply line, the power switch is disconnected, and the vehicle load is powered only through the first power supply line, the first diode conducts while the second diode is cut off. The second diode isolates the first and second power supply lines, preventing current from the first power supply line from flowing back into the second power supply line and causing a short circuit in the vehicle's isolated power supply system, thus improving the safety of the vehicle's isolated power supply system.

[0036] 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. If the first power supply module has not reached its rated capacity, the second power supply module charges the first power supply module and simultaneously supplies power to the vehicle load. 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. If the first power supply module has reached its rated capacity, the power supply module with the higher output voltage is selected for power supply. 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. If the first power supply module has reached its rated capacity and the output voltages of the first and second power supply modules are the same, either the first or the second power supply module is selected to supply power to the vehicle load. When either the first or the second power supply line is faulty, the power supply switch opens, disconnecting the first and second power supply lines. The system isolates and separates the first and second power supply lines. In this case, even if the first power supply line fails, it will not affect the second power supply line. Power can still be supplied to the vehicle load through the second power supply module and the second power supply line, better meeting the power supply needs of the vehicle load and thus satisfying the power safety and intelligent driving requirements of new energy vehicles. When the first power supply line is functioning correctly but the second power supply line fails, the power switch disconnects, severing the connection between the first and second power supply lines, thus making them isolated and independent. Again, even if the second power supply line fails, it will not affect the first power supply line. Power can still be supplied to the vehicle load through the first power supply module and the first power supply line, better meeting the power supply needs of the vehicle load and thus satisfying the power safety and intelligent driving requirements of new energy vehicles. Finally, when both the first and second power supply lines fail, the power switch disconnects, severing the connection between the first and second power supply lines, thus preventing a cascading failure in one power supply line from causing a failure in the other.

[0037] 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.

[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 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] 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 positive terminal of the first diode; 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.

[0041] 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 positive terminal of the first diode. 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 / discharging interface of the first power supply module. 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 module and the first power supply module. This allows the second power supply module to charge the first power supply module when the first power supply module has not reached its rated capacity, and simultaneously provides power to the vehicle load via the second power supply module. 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 module and the first power supply module. When a fault occurs and the output line is not faulty, the control power switch closes, connecting the second power supply module and the first power supply module. If the first power supply module reaches its rated power, the module with the higher output voltage between the first and second power supply modules is selected for power supply. When the second power supply line, charging line, and output line are all functioning correctly, the control power switch closes, connecting the second power supply module and the first power supply module. If the first power supply module reaches its rated power, either the first or second power supply module is selected to supply power to the vehicle load. When a fault occurs in the second power supply line, but the charging line and output line are not faulty... The control switch is turned off, disconnecting the second power supply line and the charging line, thus isolating and making the second power supply line and the output line independent of each other. Even if the second power supply line fails, it will not affect the first power supply module's ability to supply power to the vehicle load through the output line and the first power supply interface. Alternatively, if the second power supply line is not faulty, the charging line is faulty and the output line is not faulty, or the second power supply line is not faulty, the charging line is not faulty and 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 control switch is turned off, disconnecting the second power supply line and the charging line, thus isolating the second power supply line and the output line. The second power supply module is isolated and independent. Even if the charging line or the output line fails, it will not affect the second power supply module's ability to supply power to the vehicle load through the second power supply line and the second power supply interface. In the event of a fault in the second power supply line, a fault in both the charging line and the output line, a fault in the second power supply line but not the charging line and the output line, or a fault in both the second power supply line and the charging line but not the output line, the power supply switch will be disconnected to cut off the connection between the second power supply line and the charging line, thus isolating and ensuring that the second power supply line and the output line are mutually isolated and independent, preventing the situation from worsening due to a fault in one power supply line causing a fault in the other power supply line.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] Embodiments of this application also provide a vehicle including a vehicle redundant isolated power supply system as provided in the above embodiments.

[0047] Figure 2 This is a schematic diagram of an automotive redundant isolated power supply system, as illustrated in an exemplary embodiment of this application.

[0048] Reference Figure 2As shown, the automotive redundant isolation power supply system includes a power battery, a DC-DC controller, a second power supply line, an automotive load, a storage battery, a charging line, an output line, a first diode, and a second diode. The DC-DC controller includes an electronic control unit, a DC-DC converter, and a power switch. The automotive load has a first power supply interface and a second power supply interface. The storage battery is connected to the automotive load through the output line, the first diode, and the first power supply interface. The power battery is connected to the automotive load in sequence through the DC-DC converter, the second power supply line, the second diode, and the second power supply interface. The second power supply line is connected to the charging line through the power switch, and the charging line is connected to the charging and discharging interface of the storage battery.

[0049] 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 vehicle load through the second power supply line, the second diode, and the second power supply interface. During the process of providing low-voltage power to the 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 provides a low-voltage 12V or 24V power supply voltage to the vehicle load through the output line, the first diode, and the first power supply interface.

[0050] In this embodiment, during the process of providing a low-voltage 12V or 24V power supply to the vehicle load through the battery via the output line, the first diode, and the first power supply interface, the APS switch controller uses an overcurrent detection method to detect in real time whether the current in the charging line exceeds a preset current range, whether the current in the second power supply line exceeds a preset current range, and whether the current in the output line exceeds a 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 vehicle load.

[0051] 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.

[0052] 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. Even when the battery has not reached its rated charge, the system simultaneously supplies power to the vehicle load via the power battery, DC-DC converter, second power supply line, second diode, and second power supply interface, while simultaneously charging the battery via the power battery, DC-DC converter, second power supply line, and charging line.

[0053] 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 (open circuit, short circuit, etc.), ensuring the safety of electrical appliances and the vehicle, and further protecting the safety of passengers and preventing more serious accidents and injuries. At the same time, it also ensures the normal power supply to non-faulty lines, thereby ensuring driving safety and meeting the vehicle's power supply needs to a greater extent.

[0054] It should be noted that the automobile provided in the above embodiments and the automobile redundant isolation 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 be assigned to different functional modules as needed, that is, the internal structure of the automobile can be divided into different functional modules to complete all or part of the functions described above. This is not a limitation here.

[0055] 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. A redundant isolated power supply system for automobiles, characterized in that, The system comprises: A first power supply system, a second power supply system, a power supply switch, a first current isolation unit and a second current isolation unit; The first power supply system is connected with an automobile load through the first current isolation unit, and the second power supply system is connected with the automobile load through the second current isolation unit; one end of the power supply switch is connected with the first power supply system, and the other end of the power supply switch is connected with the second power supply system; When the first power supply system fails, the power supply switch is turned off, and at the same time, the first power supply system stops power supply, so as to supply power to the automobile load only through the second power supply system; when the second power supply system fails, the power supply switch is turned off, and at the same time, the second power supply system stops power supply, so as to supply power to the automobile load only through the first power supply system; The first current isolation unit is in a conducting state when the first power supply system supplies power to the automobile load, and is in a cut-off state when power is supplied to the automobile load only through the second power supply system; the second current isolation unit is in a conducting state when the second power supply system supplies power to the automobile load, and is in a cut-off state when power is supplied to the automobile load only through the first power supply system.

2. The automotive redundant isolated power supply system of claim 1, wherein, The first current isolation unit comprises a first diode, and the second current isolation unit comprises a second diode.

3. The automotive redundant isolated power supply system of claim 2, wherein, The automobile load has a first power supply interface and a second power supply interface, the first power supply interface is connected with a negative electrode of the first diode, and the second power supply interface is connected with a negative electrode of the second diode; the first power supply system comprises a first power supply module and a first power supply circuit, one end of the first power supply circuit is connected with the first power supply module, and the other end of the first power supply circuit is connected with a positive electrode of the first diode; the second power supply system comprises a second power supply module and a second power supply circuit, one end of the second power supply circuit is connected with the second power supply module, and the other end of the second power supply circuit is connected with a positive electrode of the second diode.

4. The automotive redundant isolated power supply system of claim 3, wherein, One end of the power supply switch is connected with the first power supply circuit, and the other end of the power supply switch is connected with the second power supply circuit; When the first power supply circuit fails, the power supply switch is turned off, and at the same time, the first power supply module stops power supply, so as to supply power to the automobile load only through the second power supply system; when the second power supply circuit fails, the power supply switch is turned off, and at the same time, the second power supply module stops power supply, so as to supply power to the automobile load only through the first power supply system; when neither the first power supply circuit nor the second power supply circuit fails, the power supply switch is turned on, so as to supply power to the automobile load through the second power supply module and charge the first power supply module through the second power supply module; The first diode is in a conducting state when the first electronic power supply system supplies power to the automobile load, and is in a cut-off state when the automobile load is powered only by the second electronic power supply system; the second diode is in a conducting state when the second electronic power supply system supplies power to the automobile load, and is in a cut-off state when the automobile load is powered only by the first electronic power supply system.

5. The automotive redundant isolated power supply system of claim 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 circuit.

6. The automotive redundant isolated power supply system of claim 3, wherein, The first power supply circuit comprises: a charging circuit and an output circuit; one end of the output circuit is connected with a charge-discharge interface of the first power supply module, and the other end of the output circuit is connected with a positive electrode of the first diode; one end of the charging circuit is connected with the power supply switch, and the other end of the charging circuit is connected with the charge-discharge interface of the first power supply module.

7. The automotive redundant isolated power supply system of claim 6, wherein, The second power supply circuit is provided with a protector for short-circuit protection or overload protection of the circuit; and / or, the charging circuit is provided with a protector for short-circuit protection or overload protection of the circuit; and / or, the output circuit is provided with a protector for short-circuit protection or overload protection of the circuit.

8. The automotive redundant isolated power supply system of claim 6, wherein, The second power supply circuit is provided with a detector for fault detection of the circuit; and / or, the charging circuit is provided with a detector for fault detection of the circuit; and / or, the output circuit is provided with a detector for fault detection of the circuit.

9. An automobile characterized by comprising: The automobile redundant isolated power supply system comprises the automobile redundant isolated power supply system according to any one of claims 1 to 8.

Images