A device for reducing the load of a power supply and a vehicle

Abstract

The present invention discloses a load reduction device for a power supply and a vehicle, which relates to the field of power control. It is provided with a controller and two switches. The controller is respectively connected to two power supply modules in the auxiliary inverter. When the controller detects a fault in a certain power supply module, it generates a corresponding fault signal. The first switch is connected in series with the first air compressor, and the second switch is connected in series with the second air compressor. These two switches are disconnected when receiving the corresponding fault signals; the power supplies provided by the two power supply modules are the same, and the power supply of any one power supply module is not less than half of the total electric energy required by all the low-voltage load devices on the vehicle including the two air compressors and is less than the total electric energy. By detecting whether the two power supply modules are faulty and shutting off one of the air compressors when one of them is faulty, the total electric energy required by the low-voltage load devices can be significantly reduced. Moreover, the power supplies of the two power supply modules adopted are relatively small, which can reduce costs and reduce electric energy waste.

Description

Technical Field

[0001] The present invention relates to the field of power control, and particularly to a device for reducing the load of a power supply and a vehicle. Background Art

[0002] The auxiliary inverter of a rail vehicle is a device that supplies power to low-voltage load devices in the vehicle. These low-voltage load devices have relatively low power, and a low-cost and low-power power supply module can be set in the auxiliary inverter to meet the power supply requirements of all devices. However, to ensure the normal operation of these low-voltage load devices, two power supply modules are usually set in the auxiliary inverter as a redundant design. However, for some special rail vehicles, in addition to the conventional low-voltage load devices, two high-power air compressors are also provided. Since these two air compressors also require the auxiliary inverter to supply power, in the prior art, to ensure the redundant power supply design, two high-power power supply modules are selected. Each of these power supply modules alone can meet the power supply requirements of all low-voltage load devices including the two air compressors. It can be seen that this will lead to an increase in economic costs and also increase the waste of electric energy resources. Summary of the Invention

[0003] The purpose of the present invention is to provide a device for reducing the load of a power supply and a vehicle, which can significantly reduce the total electric energy required by low-voltage load devices, and can also reduce costs and reduce the waste of electric energy.

[0004] To solve the above technical problems, the present invention provides a device for reducing the load of a power supply, which is applied to a vehicle. The vehicle also includes an auxiliary inverter, a first air compressor, and a second air compressor. The device for reducing the load of the power supply includes:

[0005] A controller, the controller is respectively connected to a first power supply module and a second power supply module in the auxiliary inverter. The controller is used to generate a first fault signal when detecting that the first power supply module fails, and generate a second fault signal when detecting that the second power supply module fails;

[0006] A first switch, the first switch is connected in series with the first air compressor, and a control end of the first switch is connected to a first control end of the controller, and is used to disconnect when receiving the first fault signal;

[0007] A second switch, the second switch is connected in series with the second air compressor, and a control end of the second switch is connected to a second control end of the controller, and is used to disconnect when receiving the second fault signal;

[0008] Wherein, the power supply amounts provided by the first power supply module and the second power supply module are the same, and the power supply amount of any one of the power supply modules is not less than half of the total electric energy required by all low-voltage load devices on the vehicle including the two air compressors, and is less than the total electric energy.

[0009] Preferably, a selection module is further included;

[0010] The input ends of the selection module are respectively connected to the first control end and the second control end of the controller. The first output end of the selection module is connected to the control end of the first switch, and the second output end of the selection module is connected to the control end of the second switch. The selection module is configured to connect its input end to the first output end when receiving the first fault signal, and connect its input end to the second output end when receiving the second fault signal.

[0011] Preferably, a first relay is further included;

[0012] The coil of the first relay is respectively connected to the first control end and the second control end of the controller. One end of the first normally open contact of the first relay is connected to the first output end of the selection module, the other end of the first normally open contact is connected to the control end of the first switch, one end of the second normally open contact of the first relay is connected to the second output end of the selection module, and the other end of the second normally open contact is connected to the control end of the second switch.

[0013] Preferably, the following are further included:

[0014] A second relay and a third relay;

[0015] The coil of the second relay is connected to the first control end of the controller. One end of the normally open contact of the second relay is connected to one end of the normally closed contact of the third relay, the other end of the normally open contact of the second relay is connected to the power supply, one end of the normally closed contact of the second relay is connected to one end of the normally open contact of the third relay, and the other end of the normally closed contact of the second relay is connected to the coil of the first relay;

[0016] The coil of the third relay is connected to the second control end of the controller. The other end of the normally open contact of the third relay is connected to the power supply, and the other end of the normally closed contact of the third relay is connected to the coil of the first relay.

[0017] Preferably, a first diode and a second diode are further included;

[0018] The cathode of the first diode is connected to the first air compressor, and the anode of the first diode is connected to the anode of the second diode;

[0019] The cathode of the second diode is connected to the second air compressor.

[0020] Preferably, a prompt module is further included;

[0021] The prompt module is connected to the controller, and the prompt module is configured to give a prompt when receiving a prompt signal;

[0022] The controller is further configured to generate the prompt signal when detecting a failure of any one of the first power supply module or the second power supply module.

[0023] Preferably, the vehicle further includes an air conditioner, and the load reduction device of the power supply load further includes an air conditioner control module;

[0024] The air conditioner control module is respectively connected to the first switch, the second switch and the air conditioner, and the air conditioner control module is configured to reduce the operating power of the air conditioner when detecting that the first switch or the second switch is disconnected.

[0025] Preferably, the air conditioner control module is specifically configured to control the air conditioner to enter a ventilation mode when detecting that the first switch or the second switch is disconnected.

[0026] Preferably, the air conditioner control module includes:

[0027] A signal generator and a switch module;

[0028] The switch module is configured to close when detecting that the first switch or the second switch is disconnected;

[0029] The signal generator is configured to generate a load reduction signal so that the air conditioner reduces its operating power when receiving the load reduction signal.

[0030] This application further provides a vehicle, including a vehicle body, and further including the load reduction device of the power supply load as described above;

[0031] The vehicle body is connected to the load reduction device of the power supply load.

[0032] This application provides a load reduction device for a power supply load and a vehicle, relating to the field of power control. A controller and two switches are provided. The controller is respectively connected to two power supply modules in an auxiliary inverter. The controller generates a corresponding fault signal when detecting a fault in a certain power supply module. The first switch is connected in series with the first air compressor, and the second switch is connected in series with the second air compressor. These two switches are disconnected when receiving the corresponding fault signal; the power supplies provided by the two power supply modules are the same, and the power supply of any one power supply module is not less than half of the total electric energy required by all low-voltage load devices on the vehicle including two air compressors and is less than the total electric energy. By detecting whether the two power supply modules are faulty and shutting down one of the air compressors when one of them is faulty, on the premise of ensuring that the vehicle functions can still be roughly normally realized after the power supply module fails, the total electric energy required by the low-voltage load devices can be significantly reduced, and the power supplies of the two power supply modules adopted are both small, which can reduce costs and reduce electric energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the prior art and the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0034] Figure 1 FIG. [ID] is a schematic structural diagram of a load reduction device for a power supply load provided by the present application;

[0035] Figure 2 FIG. [ID] is a schematic structural diagram of another load reduction device for a power supply load provided by the present application;

[0036] Figure 3 FIG. [ID] is a schematic structural diagram of a load reduction device for a power supply load with a relay provided by the present application;

[0037] Figure 4 FIG. [ID] is a schematic structural diagram of a control device for a first relay provided by the present application;

[0038] Figure 5 FIG. [ID] is a schematic structural diagram of a vehicle provided by the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] The core of the present invention is to provide a load reduction device for a power supply load and a vehicle, which can significantly reduce the total electric energy required by the low-voltage load device, can also reduce costs, and reduce electric energy waste.

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0041] Please refer to Figure 1 , Figure 1 FIG. [ID] is a schematic structural diagram of a load reduction device for a power supply load provided by the present application, which is applied to a vehicle. The vehicle further includes an auxiliary inverter, a first air compressor, and a second air compressor. The load reduction device for the power supply load includes:

[0042] A controller 11, which is respectively connected to a first power supply module and a second power supply module in the auxiliary inverter. The controller 11 is configured to generate a first fault signal when detecting a fault in the first power supply module, and generate a second fault signal when detecting a fault in the second power supply module;

[0043] The first switch 12 is connected in series with the first air compressor. The control end of the first switch 12 is connected to the first control end of the controller 11 and is used to disconnect when receiving the first fault signal.

[0044] The second switch 13 is connected in series with the second air compressor. The control end of the second switch 13 is connected to the second control end of the controller 11 and is used to disconnect when receiving the second fault signal.

[0045] Wherein, the power supply amounts provided by the first power supply module and the second power supply module are the same. The power supply amount of any one of the power supply modules is not less than half of the total electric energy required by all the low-voltage load devices on the vehicle including the two air compressors and is less than the total electric energy.

[0046] The auxiliary inverter of the rail engineering vehicle is powered in a dual-module redundancy manner, that is, when one of the power supply modules fails, the other power supply module supplies power. Currently, due to the small power of the low-voltage load devices, only one power supply module is required to meet the power supply requirements of all the low-voltage load devices combined. Therefore, in the prior art, when switching to another power supply module for power supply due to a power supply module failure, no load reduction processing is performed on the device. It can be seen that when the overall power of the low-voltage load devices increases, if the dual-module redundancy method in the prior art still needs to be maintained, it is necessary to ensure that a single power supply module can meet the power supply requirements of all the low-voltage load devices combined. Furthermore, a high-cost and high-power power supply module needs to be used. Moreover, because only one power supply module can meet the power supply requirements, in normal operation, it will also cause greater waste of electric energy resources.

[0047] To solve the above technical problems, in this application, on the premise of maintaining dual-module redundancy, the two power supply modules adopted have a smaller power supply amount compared with the prior art. The total power supply amount of the two power supply modules in this application can meet the power supply requirements of all the low-voltage load devices including the two air compressors. For one power supply module, its power supply amount can at least meet half of the power supply requirements of all the low-voltage load devices and at most does not exceed the entire power supply requirement, that is, a single power supply module can provide 50% - 99% of the power supply of all the low-voltage load devices. Compared with the method in the prior art that requires a single power supply module to provide at least 100% power supply, the power supply modules adopted in this application have lower costs and less electric energy waste.

[0048] In order to reduce the load on the device, in this application, considering that the power supply module in this application can provide less electrical energy and two power supply modules need to work together to ensure the normal power supply of all low-voltage load devices during normal operation. If one of the power supply modules fails and only one power supply module remains, it cannot supply power to these low-voltage load devices. Therefore, at this time, it is necessary to reduce the load on these low-voltage load devices. Specifically, considering that the air compressor belongs to a high-power device, while the other low-voltage load devices still belong to devices with relatively small power. Compared with the power supply requirements of the air compressor, the power supply requirements of other low-voltage load devices can be ignored. Based on this, load reduction processing can be carried out for two air compressors. Two switches are respectively set, and these two switches are respectively connected in series with the two air compressors one by one. The two control ends of the controller 11 are respectively connected to the control ends of these two switches. When the controller 11 detects a failure of the first power supply module, it controls the first switch 12 to disconnect through the first control end, so that the first air compressor loses power and stops; similarly, when the controller 11 detects a failure of the second power supply module, the second air compressor stops. It is equivalent to closing half of the air compressors when detecting a failure of one of the power supply modules, and the total power supply requirements of all low-voltage load devices are reduced by half. At this time, because half of the air compressors are still running, and other low-voltage load devices with relatively small power are also running, so there is no significant impact on the functions of the vehicle. Based on this, when one of the power supply modules fails, by shutting down half of the air compressors, the power supply requirements are reduced under the premise of having little impact on the vehicle functions, so that the power supply module with a smaller power supply capacity can also meet the power supply requirements of the low-voltage load devices after load reduction.

[0049] Based on the above embodiments:

[0050] As a preferred embodiment, it further includes a selection module 14;

[0051] The input end of the selection module 14 is respectively connected to the first control end and the second control end of the controller 11. The first output end of the selection module 14 is connected to the control end of the first switch 12, and the second output end of the selection module 14 is connected to the control end of the second switch 13. The selection module 14 is used to connect its input end and the first output end when receiving the first fault signal, and connect its input end and the second output end when receiving the second fault signal.

[0052] For accurate control, in this application, a selection module 14 is also set. Please refer to Figure 2 , Figure 2Schematic diagram of another load reduction device for power supply provided by this application. Considering that the switch is connected in series with the air compressor, once the switch is turned off, the air compressor will stop working. If there are short-term sudden interferences or crosstalk in the transmission process of the control signal, it may cause all air compressors to stop working, resulting in abnormal vehicle functions. To avoid the situation where all air compressors stop working, a selection module 14 is provided. The principle of the selection module 14 is similar to that of a single-pole double-throw switch. After determining that a certain power supply module fails, only the corresponding switch will be turned on. For example, when it is determined that the first power supply module fails, the selection module 14 will connect the input terminal to the first output terminal, so that the control signal of the control module can only pass through the first switch 12, and the second switch 13 will not be affected, thereby achieving the purpose of accurately controlling the first switch 12 and preventing the second switch 13 from receiving the signal by mistake and causing all air compressors to stop working.

[0053] As a preferred embodiment, it further includes a first relay;

[0054] The coil of the first relay is respectively connected to the first control terminal and the second control terminal of the controller 11. One end of the first normally open contact of the first relay is connected to the first output terminal of the selection module 14, the other end of the first normally open contact is connected to the control terminal of the first switch 12, one end of the second normally open contact of the first relay is connected to the second output terminal of the selection module 14, and the other end of the second normally open contact is connected to the control terminal of the second switch 13.

[0055] For accurate control, in this application, considering that turning off the air compressor is one of the important operations on the vehicle, in order to ensure that the air compressor will not be abnormally turned off due to misoperation under normal working conditions, a first relay is provided. Please refer to Figure 3 , Figure 3Schematic diagram of a load reduction device for a power supply load with a relay provided by this application. The first relay has two normally open contacts, which are respectively arranged between the two output terminals of the selection module 14 and the two switches. Under normal operating conditions, these two normally open contacts disconnect the selection module 14 from the first switch 12 and the second switch 13. Even if the selection module 14 erroneously connects its input terminal to a certain output terminal under normal conditions, no signal will pass through these two switches. It is equivalent to the selection module 14 serving as the first layer of measure to prevent abnormal shutdown, and the first relay serving as the second layer of measure to prevent abnormal shutdown, thereby ensuring that the air compressor will not be abnormally shut down under normal conditions. The first relay is controlled by the control signal of the controller 11. When the controller 11 detects a failure of any power supply module, it outputs a corresponding failure signal. No matter which failure signal the first relay receives, it will cause the two normally open contacts to close, enabling the controller 11 to normally control the first switch 12 or the second switch 13 to disconnect. Based on this, by setting the first relay, the two switches can be accurately controlled, avoiding the situation of the air compressor being abnormally shut down.

[0056] As a preferred embodiment, it further includes:

[0057] A second relay and a third relay;

[0058] The coil of the second relay is connected to the first control terminal of the controller 11. One end of the normally open contact of the second relay is connected to one end of the normally closed contact of the third relay. The other end of the normally open contact of the second relay is connected to the power supply. One end of the normally closed contact of the second relay is connected to one end of the normally open contact of the third relay. The other end of the normally closed contact of the second relay is connected to the coil of the first relay;

[0059] The coil of the third relay is connected to the second control terminal of the controller 11. The other end of the normally open contact of the third relay is connected to the power supply. The other end of the normally closed contact of the third relay is connected to the coil of the first relay.

[0060] In order to further accurately control the switches, in this application, considering that although the selection module 14 and the first relay are set as two layers of anti-mis-triggering measures, since the coil of the first relay is directly connected to the two control terminals of the controller 11, in actual application, it may occur that the controller 11 erroneously sends a signal to the coil of the first relay, resulting in the closure of the contacts of the first relay. Therefore, a second relay and a third relay are additionally set. Please refer to Figure 4 , Figure 4Schematic diagram of a control device for a first relay provided by this application. The coils of these two relays are respectively connected to two control terminals of the controller 11. Moreover, each of these two relays has a normally open contact and a normally closed contact. These 4 contacts are all arranged between the coil of the first relay and the power supply. That is, the coil of the first relay is not directly connected to a certain control terminal of the controller 11 at this time, but is connected to the power supply, and the second relay and the third relay are used to control whether the power supply and the coil of the first relay are conducting. Among the second relay and the third relay, the normally open contact of the second relay is connected in series with the normally closed contact of the third relay. Similarly, the normally closed contact of the second relay is connected in series with the normally open contact of the third relay. In practical applications, if the controller 11 generates two fault signals simultaneously, the normally open contact of the second relay will close, but the normally closed contact of the third relay will also open, resulting in the circuit still being in an open state. Similarly, the other circuit is also in an open state, so the first relay will not be triggered; and when the controller 11 generates only one fault signal, only one relay will act, so one of the circuits will be in a conducting state, thereby normally triggering the first relay to trigger the first switch 12 or the second switch 13. Based on this, the switch can be more effectively and accurately controlled.

[0061] As a preferred embodiment, it further includes a first diode and a second diode;

[0062] The cathode of the first diode is connected to the first air compressor, and the anode of the first diode is connected to the anode of the second diode;

[0063] The cathode of the second diode is connected to the second air compressor.

[0064] In order to avoid interference between air compressors, in this application, considering that the air compressors in actual applications need to ensure normal operation of the vehicle under normal and emergency traction conditions, usually two control units are set up to control the air compressors. Among them, there is a network control module that receives control from staff through the network, and there is also a hardware control module that uses a hardware circuit for control. These network control modules are connected to each air compressor one by one. However, due to the existence of the hardware control module, the hardware control module also needs to be connected to each air compressor, resulting in a connection relationship between each network control module based on the hardware control module. During normal operation, although the hardware control module will not be triggered, when the network control module sends an instruction to the air compressor, it may be transmitted to other air compressors through this connection relationship, causing abnormal control. Based on this, two diodes are set between two air compressors. Specifically, the anodes of the diodes are connected to each other, and the cathodes are respectively connected to the air compressor and the output end of the corresponding network control module. By the characteristics of the diodes, the signals of the network control module are blocked from being transmitted to other air compressors, and the hardware control module is set between the two diodes to enable the hardware control to be executed normally. Based on this, by setting the diodes, interference between air compressors can be avoided.

[0065] As a preferred embodiment, it further includes a prompt module;

[0066] The prompt module is connected to the controller 11, and the prompt module is used to give a prompt when receiving a prompt signal;

[0067] The controller 11 is also used to generate a prompt signal when detecting a failure of any one of the first power supply module or the second power supply module.

[0068] In order to prompt and notify the staff, in this application, a prompt module is also set up. The prompt module can be a module that gives a sound prompt, such as a buzzer or a speaker, etc. The prompt module can also be a module that gives a light prompt, such as an LED light, a light bulb or a display screen, etc. After the controller 11 detects a failure of the power supply module, it will send a prompt signal to the prompt module. After receiving the prompt signal, the prompt module can display information indicating which power supply module has failed specifically, so that the staff can determine which power supply module has failed in time.

[0069] As a preferred embodiment, the vehicle further includes an air conditioner, and the load reduction device of the power supply load further includes an air conditioner control module;

[0070] The air conditioner control module is respectively connected to the first switch 12, the second switch 13 and the air conditioner. The air conditioner control module is used to reduce the working power of the air conditioner when detecting that the first switch 12 or the second switch 13 is disconnected.

[0071] In order to effectively reduce the load, in this application, considering that some vehicles are also equipped with air conditioners, and since the air conditioner is also a high-power device, it is necessary to control the air conditioner when the power supply module fails. Specifically, if the air conditioner is directly turned off, it will not only cause the air inside the vehicle to be unable to circulate with the outside world, but also cause the temperature inside the vehicle to rise, which may cause discomfort to the staff or problems with other devices. Therefore, a preset working power can be preset according to the actual working power of the air conditioner when it is working and the power supply that a single power supply module can provide to the air conditioner. This preset working power is less than the actual working power, usually half or less of the actual working power. When it is detected that one of the switches is disconnected, that is, when it is detected that there is a power supply module failure, the working power of the air conditioner is reduced to the preset working power and continues to operate in a low-power environment. Although the cold or hot air output of the air conditioner may not be able to ensure that the internal environment of the vehicle is completely normal at this time, compared with turning off the air conditioner, the air conditioner that continues to operate at low power can still ensure its own normal operation and reduce the impact caused by the power supply module failure. Based on this, by reducing the working power, the load can be effectively reduced.

[0072] As a preferred embodiment, the air conditioner control module is specifically configured to control the air conditioner to enter the ventilation mode when it detects that the first switch 12 or the second switch 13 is disconnected.

[0073] In order to effectively reduce the load, in this application, considering that when the air conditioner performs refrigeration or heating work, in addition to the fan in the air conditioner needing to work, the refrigeration unit or heating unit in the air conditioner also needs to participate in the work. The working principle of the refrigeration or heating unit is usually to use a large current to generate or absorb heat, so that the temperature of the surrounding air changes. It can be seen that the refrigeration or heating unit is the main power-consuming component in the air conditioner. Based on this, in order to reduce the working power and ensure normal ventilation inside the vehicle, when it is detected that the power supply module fails, the air conditioner is controlled to enter the ventilation mode. Since the main power-consuming refrigeration or heating unit is turned off, it is not necessary to turn off the relatively low-power air conditioner fan or reduce its power to ensure that the working power of the air conditioner is relatively low. Therefore, on the premise of ensuring that the working power of the air conditioner itself is relatively low, the air conditioner can still operate normally to ensure normal ventilation inside the vehicle. Based on this, by controlling the air conditioner to enter the ventilation mode, the load can be effectively reduced.

[0074] As a preferred embodiment, the air conditioner control module includes:

[0075] A signal generator and a switch module;

[0076] The switch module is used to close when it detects that the first switch 12 or the second switch 13 is disconnected;

[0077] The signal generator is used to generate a load reduction signal so that the air conditioner reduces its working power when receiving the load reduction signal.

[0078] In order to simply implement the functions of the air conditioner control module, in this application, the air conditioner control module is composed of a signal generator and a switch module. The signal generator is a device that continuously generates load reduction signals. The switch module is arranged between the signal generator and the air conditioner. The switch module is normally in an open state. After the first switch 12 or the second switch 13 is disconnected, the switch module closes, enabling the signal sent by the signal generator to enter the air conditioner through the switch module. After receiving the load reduction signal, the air conditioner automatically reduces its working power. The switch module can be a relay with normally open contacts. When there is a power supply module failure, the controller 11 sends a signal to energize the relay coil and make it close, thus simply implementing the functions of the air conditioner control module.

[0079] Please refer to Figure 5 , Figure 5 which is a schematic structural diagram of a vehicle provided by this application, including a vehicle body 21, and also including a load reduction device 22 for the power supply load as described above;

[0080] The vehicle body 21 is connected to the load reduction device 22 for the power supply load.

[0081] For an embodiment of a vehicle provided by this application, please refer to the embodiment of the load reduction device for the power supply load above. This application will not elaborate here.

[0082] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the vehicle disclosed in the embodiment, since it corresponds to the device disclosed in the embodiment, the description is relatively simple. For the relevant parts, please refer to the description in the method section.

[0083] It should also be noted that in this specification, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, article or device including the said element.

[0084] Those skilled in the art may further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

Claims

1. A device for reducing the load of a power supply, characterized in that, it is applied to a vehicle, and the vehicle further includes an auxiliary inverter, a first air compressor and a second air compressor. The device for reducing the load of the power supply includes: a controller, the controller is respectively connected to a first power supply module and a second power supply module in the auxiliary inverter, and the controller is used to generate a first fault signal when detecting a fault of the first power supply module, and generate a second fault signal when detecting a fault of the second power supply module; a first switch, the first switch is connected in series with the first air compressor, and the control end of the first switch is connected to the first control end of the controller, and is used to disconnect when receiving the first fault signal; a second switch, the second switch is connected in series with the second air compressor, and the control end of the second switch is connected to the second control end of the controller, and is used to disconnect when receiving the second fault signal; wherein, the power supply amounts provided by the first power supply module and the second power supply module are the same, and the power supply amount of any one of the power supply modules is not less than half of the total electric energy required by all the low-voltage load devices on the vehicle including the two air compressors, and is less than the total electric energy; when detecting a fault of one of the power supply modules, half of the air compressors are turned off, and the total power supply demand of all the low-voltage load devices is reduced by half; correspondingly, it further includes a selection module; the input end of the selection module is respectively connected to the first control end and the second control end of the controller, the first output end of the selection module is connected to the control end of the first switch, and the second output end of the selection module is connected to the control end of the second switch. The selection module is used to connect its input end to the first output end when receiving the first fault signal, and connect its input end to the second output end when receiving the second fault signal; wherein, after determining that one of the power supply modules is faulty, only the corresponding one switch is turned on; correspondingly, it further includes a first relay; the coil of the first relay is respectively connected to the first control end and the second control end of the controller, one end of the first normally open contact of the first relay is connected to the first output end of the selection module, the other end of the first normally open contact is connected to the control end of the first switch, one end of the second normally open contact of the first relay is connected to the second output end of the selection module, and the other end of the second normally open contact is connected to the control end of the second switch; wherein, under normal working conditions, the two normally open contacts make the circuit between the selection module and the first switch and the second switch open.

2. The device for reducing the load of the power supply according to claim 1, characterized in that, it further includes: a second relay and a third relay; The coil of the second relay is connected to the first control terminal of the controller. One end of the normally open contact of the second relay is connected to one end of the normally closed contact of the third relay. The other end of the normally open contact of the second relay is connected to the power supply. One end of the normally closed contact of the second relay is connected to one end of the normally open contact of the third relay. The other end of the normally closed contact of the second relay is connected to the coil of the first relay; The coil of the third relay is connected to the second control terminal of the controller. The other end of the normally open contact of the third relay is connected to the power supply. The other end of the normally closed contact of the third relay is connected to the coil of the first relay.

3. The power supply load reduction device according to claim 1, characterized in that, it further comprises a first diode and a second diode; The cathode of the first diode is connected to the first air compressor, and the anode of the first diode is connected to the anode of the second diode; The cathode of the second diode is connected to the second air compressor.

4. The power supply load reduction device according to claim 1, characterized in that, it further comprises a prompting module; The prompting module is connected to the controller, and the prompting module is used to issue a prompt when receiving a prompt signal; The controller is further used to generate the prompt signal when detecting a fault in any one of the first power supply module or the second power supply module.

5. The power supply load reduction device according to any one of claims 1 to 4, characterized in that, the vehicle further comprises an air conditioner, and the power supply load reduction device further comprises an air conditioner control module; The air conditioner control module is respectively connected to the first switch, the second switch and the air conditioner, and the air conditioner control module is used to reduce the working power of the air conditioner when detecting that the first switch or the second switch is disconnected.

6. The power supply load reduction device according to claim 5, characterized in that, the air conditioner control module is specifically used to control the air conditioner to enter the ventilation mode when detecting that the first switch or the second switch is disconnected.

7. The power supply load reduction device according to claim 5, characterized in that, the air conditioner control module comprises: a signal generator and a switch module; The switch module is used to close when detecting that the first switch or the second switch is disconnected; The signal generator is used to generate a load reduction signal so that the air conditioner reduces its working power when receiving the load reduction signal.

8. A vehicle, characterized in that, it comprises a vehicle body and further comprises the power supply load reduction device according to any one of claims 1 to 7; The vehicle body is connected to the power supply load reduction device.

Images