Auxiliary power supply system, direct current power distribution cabinet and ship carrier

Abstract

The embodiment of the utility model provides an auxiliary power supply system, a DC power distribution cabinet and a ship carrier, and the system comprises power supply switching units which are coupled between a main power supply unit and an auxiliary power supply output end in a one-to-one correspondence manner, the first output circuit is configured to connect / disconnect the main power supply unit to the auxiliary power supply output end correspondingly based on the availability / unavailability of the connected main power supply unit; the charging and discharging control unit is coupled between the standby power supply unit and the auxiliary power supply output end and comprises a discharging circuit and a charging circuit; the charging and discharging control unit conducts the discharging circuit and disconnects the charging circuit according to an output signal formed at the output end of the auxiliary power supply when each first output circuit is disconnected; and switching on the charging circuit and switching off the discharging circuit according to an output signal formed at the output end of the auxiliary power supply when the first output circuit is switched on. Through the charging and discharging control unit, when the main power supply is cut off, the standby power supply unit can immediately replace power supply, and the electric power continuity is seamlessly guaranteed.

Description

Technical Field

[0001] The present disclosure relates to the technical field of auxiliary power supply, and in particular to an auxiliary power supply system, a direct current distribution cabinet and a ship carrier. Background Art

[0002] In the current rapid development of ship engineering and navigation technology, the ship auxiliary power system, as an auxiliary power system in addition to the ship propulsion system, is crucial to ensure the normal operation and safety of the ship. However, although the existing auxiliary power systems mostly use uninterruptible power supply (UPS) systems as a safeguard to ensure uninterrupted power supply when the main power fails, this technical solution still exposes several key deficiencies. Although the existing ship auxiliary power system is integrated with a UPS system as a power backup and is usually equipped with batteries as the final emergency energy source, this cannot completely eliminate the risk of failure. Batteries have aging problems, their capacity gradually decays over time, and their performance drops significantly in extreme environments (such as high temperature and low temperature), which may result in the failure to provide the expected power support at critical moments. In addition, possible design defects or improper maintenance of the UPS system may also cause system failures, affecting its reliability and stability.

[0003] The existing auxiliary power supply system is usually equipped with only a single UPS as an auxiliary power supply, lacking the necessary redundancy design. This means that once the UPS system fails, the auxiliary power supply will be immediately interrupted, posing a direct threat to the safe navigation of the ship. Especially in complex offshore operating environments, this single point failure may trigger a chain reaction, affecting key functions of the ship such as navigation, communication, and emergency response, endangering the safety of the crew and the offshore environment. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an auxiliary power supply system, a DC distribution cabinet and a ship carrier to solve the problems in the related technology.

[0005] A first aspect of the present disclosure provides an auxiliary power system, which is applied to a ship; the auxiliary power system is used to supply power to an auxiliary power unit of the ship, and includes:

[0006] Multiple main power supply units and at least one backup power supply unit;

[0007] A plurality of power switching units are coupled one by one between each main power unit and an auxiliary power output terminal, and are configured to connect / disconnect the first output line from the main power unit to the auxiliary power output terminal based on the availability / unavailability of the connected main power unit;

[0008] At least one charge and discharge control unit, coupled between each of the at least one backup power supply unit and the auxiliary power supply output terminal, including a discharge circuit connected between the at least one backup power supply unit and the auxiliary power supply output terminal, and a charge circuit connected between the power switching unit and the at least one backup power supply unit;

[0009] The at least one charge and discharge control unit turns on the discharge circuit and turns off the charge circuit according to an output signal formed at the auxiliary power supply output terminal when all the first output circuits are disconnected;

[0010] The at least one charge and discharge control unit turns on the charging circuit and turns off the discharging circuit according to an output signal formed at the auxiliary power supply output terminal when at least one of the first output circuits is turned on.

[0011] Optionally, one of the at least one power switching unit comprises:

[0012] A first unidirectional conductive module, wherein the first unidirectional conductive module comprises a first end and a second end;

[0013] The first end is coupled to one of the plurality of main power supply units, and the second end is coupled to the auxiliary power supply output end;

[0014] The first unidirectional conduction module is configured to unidirectionally conduct a conduction path from the first end to the second end based on a voltage difference between the first end and the second end.

[0015] Optionally, the multiple main power supply units include a new energy power supply, and the new energy power supply includes a lithium battery pack and / or a fuel cell.

[0016] Optionally, the multiple main power supply units include a DC uninterruptible power supply.

[0017] Optionally, one of the at least one charge and discharge control unit comprises:

[0018] A second unidirectional conduction module is provided in the charging circuit, and comprises a third end and a fourth end, which are respectively coupled to the at least one backup power supply unit and the power switching unit;

[0019] The second unidirectional conduction module is configured to unidirectionally conduct the conduction path from the third end to the fourth end based on the voltage difference between the third end and the fourth end, so as to conduct the charging line;

[0020] A backup voltage stabilizing device, coupled between the second unidirectional conduction module and the at least one backup power supply unit;

[0021] A third unidirectional conduction module, disposed in the discharge circuit, comprises a fifth end and a sixth end, which are respectively coupled to the auxiliary power supply output end and the at least one backup power supply unit;

[0022] The third unidirectional conduction module is configured to unidirectionally conduct a conduction path from the sixth terminal to the fifth terminal based on a voltage difference between the fifth terminal and the sixth terminal, so as to conduct the discharge line.

[0023] Optionally, also include:

[0024] A plurality of main voltage stabilizing devices are coupled between each of the main power supply units and each of the power switching units in a one-to-one correspondence.

[0025] Optionally, the at least one backup power supply unit comprises a lead-acid battery.

[0026] Optionally, also include:

[0027] An AC power supply unit, wherein an input end of the AC power supply unit is coupled to the mains, and an output end of the AC power supply unit is coupled to the auxiliary power supply output end and / or the at least one backup power supply unit;

[0028] a bidirectional control unit, coupled between the AC power supply unit and the auxiliary power supply output terminal, comprising a backup discharge circuit connected between the AC power supply unit and the auxiliary power supply output terminal, and a backup charging circuit connected between the AC power supply unit and the at least one backup power supply unit;

[0029] The bidirectional control unit turns on the backup discharge circuit and the backup charging circuit according to an output signal formed at the auxiliary power supply output terminal when the first output circuit is disconnected and the charging circuit is disconnected;

[0030] The bidirectional control unit disconnects the backup discharge circuit and the backup charging circuit according to an output signal formed at the auxiliary power supply output end when the first output circuit is turned on.

[0031] A second aspect of the present disclosure provides a DC distribution cabinet, which includes the auxiliary power supply system described in any one of the above items.

[0032] A third aspect of the present disclosure provides a ship carrier, which includes the DC distribution cabinet mentioned above to obtain auxiliary power supply.

[0033] The beneficial effects of the present disclosure are as follows: the present disclosure can not only switch to the available main power supply and control the charging and discharging of the backup power supply unit according to the operating status of each main power supply through the charging and discharging control unit, but also make full use of the main power supply to charge the backup power supply unit, ensuring that when the main power supply is cut off, the backup power supply unit can immediately take over the power supply, seamlessly ensuring power continuity. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A system structure block diagram of an auxiliary power system in one embodiment of the present disclosure is shown.

[0035] Figure 2 A system structure block diagram of a charging and discharging control unit in an auxiliary power supply system in an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0036] The following is an explanation of the embodiments of the present disclosure by specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the information disclosed by the present disclosure. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in the present disclosure can also be modified or changed in various ways according to different viewpoints and application modules without departing from the spirit of the present disclosure. It should be noted that the embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0037] The following is a detailed description of the embodiments of the present disclosure with reference to the accompanying drawings so that those skilled in the art can easily implement the present disclosure. The present disclosure can be embodied in many different forms and is not limited to the embodiments described herein.

[0038] In the representations of the present disclosure, the reference terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" and the like mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. Moreover, the specific features, structures, materials or characteristics represented may be combined in any one or a group of embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples represented in the present disclosure and the features of different embodiments or examples, unless they are mutually contradictory.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the representation of the present disclosure, "a group" means two or more, unless otherwise clearly and specifically defined.

[0040] In order to clearly describe the present disclosure, components not related to the description are omitted, and the same reference numerals are given to the same or similar components throughout the specification.

[0041] Throughout the specification, when a device is said to be "connected" to another device, this includes not only the case of "direct connection" but also the case of "indirect connection" by placing other elements therebetween. In addition, when a device is said to "include" a certain component, unless otherwise stated, it does not exclude other components, but means that other components may be included.

[0042] Although the terms first, second, etc. are used to represent various elements in this article in some examples, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, the first interface and the second interface, etc. represent. Moreover, as used in this article, the singular forms "one", "one" and "the" are intended to also include plural forms, unless there is an opposite indication in the context. It should be further understood that the terms "comprising", "including" indicate that there are described features, steps, operations, elements, modules, projects, kinds, and / or groups, but do not exclude the existence, occurrence or addition of one or a group of other features, steps, operations, elements, modules, projects, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Only when the combination of elements, functions, steps or operations is inherently mutually exclusive in some ways, the exception of this definition will occur.

[0043] The technical terms used herein are only used to refer to specific embodiments and are not intended to limit the present disclosure. The singular form used herein also includes the plural form unless the sentence clearly indicates the contrary meaning. The meaning of "including" used in the specification is to specify specific characteristics, regions, integers, steps, operations, elements and / or components, and does not exclude the existence or addition of other characteristics, regions, integers, steps, operations, elements and / or components.

[0044] Although not defined differently, all terms, including technical and scientific terms used herein, have the same meaning as those generally understood by those skilled in the art to which the present disclosure belongs. Terms defined in commonly used dictionaries are additionally interpreted as having meanings consistent with relevant technical literature and the message of the present disclosure, and shall not be overly interpreted as ideal or very formal meanings unless defined.

[0045] In the related technology, the existing auxiliary power supply system is usually equipped with only a single UPS as an auxiliary power supply, lacking the necessary redundancy design. This means that once the UPS system fails, the auxiliary power supply will be immediately interrupted, posing a direct threat to the safe navigation of the ship. Especially in a complex offshore operating environment, this single point failure may trigger a chain reaction, affecting the ship's key functions such as navigation, communication, and emergency response, endangering the safety of the crew and the offshore environment.

[0046] The auxiliary power supply system 100 provided in the first aspect of the present disclosure is applied to a DC power distribution cabinet; the auxiliary power supply system is used to supply power to the auxiliary power unit of the ship. Figure 1 In an embodiment, the auxiliary power system 100 includes:

[0047] A plurality of main power supply units 200 and at least one backup power supply unit 300;

[0048] A plurality of power switching units 500 are coupled one by one between each main power unit 200 and an auxiliary power output terminal 400, and are configured to connect / disconnect the first output line from the main power unit 200 to the auxiliary power output terminal 400 based on the availability / unavailability of the connected main power unit 200;

[0049] At least one charge and discharge control unit 600, coupled between each of the at least one backup power supply unit 300 and the auxiliary power supply output terminal 400, including a discharge circuit connected between the at least one backup power supply unit 300 and the auxiliary power supply output terminal 400, and a charging circuit connected between the power switching unit 500 and the at least one backup power supply unit 300;

[0050] The at least one charge and discharge control unit 600 turns on the discharge circuit and turns off the charge circuit according to the output signal formed at the auxiliary power supply output terminal 400 when all the first output circuits are disconnected;

[0051] The at least one charge and discharge control unit 600 turns on the charging circuit and turns off the discharging circuit according to an output signal formed at the auxiliary power supply output terminal 400 when at least one of the first output circuits is turned on.

[0052] Specifically, in some embodiments, the ship auxiliary power unit is a device used to provide various energies other than the propulsion device for the navigation, operation and life needs of the ship, including devices for providing lighting and other power for the entire ship, such as a ship power station, auxiliary boiler, etc.

[0053] A plurality of main power supply units 200 are provided in the auxiliary power supply system 100, each of which is connected to the auxiliary power supply output terminal 400 through a corresponding power supply switching unit 500. The power supply switching unit 500 monitors the main power supply status, and when the main power supply is available, the line from the corresponding main power supply to the auxiliary power supply output terminal 400 is turned on; otherwise, if the main power supply is unavailable, it is automatically disconnected to achieve fault isolation and instant switching.

[0054] At least one backup power supply unit 300 is closely connected to the auxiliary power supply output terminal 400 through the charge and discharge control unit 600. The charge and discharge control unit 600 includes: a discharge circuit and a charging circuit. When all the main power supply units 200 are unavailable, the charge and discharge control unit 600 receives the signal from the auxiliary power supply output terminal 400, and immediately opens the discharge circuit to provide emergency power support for the ship. At the same time, since multiple main power supply units 200 are normal, the main power supply unit 200 also provides power to the backup power supply unit 300 for energy storage of the backup power supply unit 300. Therefore, when all the main power supply units 200 are unavailable, the charge and discharge control unit 600 will disconnect the charging circuit. Conversely, when at least one main power supply is online and working, the control unit switches the mode, closes the discharge circuit, and opens the charging circuit to ensure that the backup power supply is continuously fully charged and ready at any time.

[0055] The charge and discharge control unit 600 monitors the status of the first output line in real time, intelligently determines the availability of the main power supply, and dynamically adjusts the charge and discharge status, thereby ensuring continuous and stable power supply to the auxiliary power supply output terminal 400, and effectively avoiding the risk of paralysis of the entire system due to the failure of the single main power supply unit 200 to provide auxiliary power.

[0056] Optional, in Figure 1 In an embodiment, one of the at least one power switching unit 500 includes:

[0057] A first unidirectional conductive module 501, wherein the first unidirectional conductive module 501 comprises a first end and a second end;

[0058] The first end is coupled to one of the plurality of main power supply units 200, and the second end is coupled to the auxiliary power supply output end 400;

[0059] The first unidirectional conduction module 501 is configured to unidirectionally conduct a conduction path from the first end to the second end based on a voltage difference between the first end and the second end.

[0060] Specifically, as an example, in Figure 1 In the embodiment, the first unidirectional conduction module 501 is a unidirectional conduction circuit constructed based on a diode, the first end of the diode is connected to multiple main power supply units 200, and the second end is coupled to the auxiliary power supply output terminal 400. By utilizing the natural properties of the diode, current is only allowed to flow from the first end (anode) to the second end (cathode). When the voltage at the first end is higher than that at the second end to form a forward bias, the diode is turned on to achieve power transmission from the main power supply to the auxiliary power supply output terminal 400.

[0061] In addition to the diode, the first unidirectional conduction module 501 can also be a unidirectional conduction circuit constructed based on various other components to adapt to different application requirements and environmental conditions. Several possibilities are listed below:

[0062] MOSFET: The source of MOSFET is connected to the main power supply unit 200, the drain is connected to the auxiliary power supply output terminal 400, and the gate maintains an appropriate voltage difference with the source through the control circuit. When the control circuit detects that the main power supply voltage unit is higher than the auxiliary power supply terminal voltage, a suitable voltage is applied through the gate to turn on the MOSFET to achieve unidirectional current transmission.

[0063] IGBT: The collector of the IGBT is connected to the main power supply unit 200, the emitter is connected to the auxiliary power supply output terminal 400, and the gate is driven by the control circuit. When the control circuit detects that the main power supply voltage is higher than the auxiliary power supply terminal voltage, it sends a drive signal to the gate, and the electrons and holes inside the IGBT recombine to form a conductive channel, allowing current to flow in one direction.

[0064] Optionally, the plurality of main power supply units 200 include new energy power supplies. Figure 1 In the embodiment, the new energy power source includes a lithium battery pack 201 and / or a fuel cell 202 .

[0065] Specifically, in some embodiments, in order to ensure the stable output of the output power supply, as a first example, the main power supply unit 200 integrates one or more high-quality lithium battery packs 201, which are composed of multiple lithium-ion battery cells connected in series or in parallel to meet different voltage and capacity requirements. Each battery cell is equipped with an advanced battery management system (200MS), which is responsible for monitoring the battery status (such as voltage, current, temperature, etc.) to ensure the safe operation of the battery pack and extend its service life. The lithium battery pack 201 can automatically charge during the low power demand period and release energy during the peak power demand period, realizing "peak shaving and valley filling" and optimizing the efficiency of power use.

[0066] As a second example, the fuel cell 202 is another new energy option, and the main power supply unit 200 can also be equipped with a fuel cell 202 module, the core component of which is a fuel cell 202 stack. The fuel cell 202 stack is based on proton exchange membrane technology, uses hydrogen as fuel, and oxygen (usually extracted from the air) as an oxidant, directly converts chemical energy into electrical energy through electrochemical reactions, and the byproducts are only water and heat, achieving zero emissions.

[0067] The main power supply unit 200 dynamically adjusts the output ratio of the lithium battery pack 201 and the fuel cell 202 according to the actual load demand and the real-time status of the new energy power supply to achieve the optimal configuration of energy. In some embodiments, the two can be designed as a complementary working mode, that is, when the power demand is high, the fuel cell 202 is used as the main power source, and the lithium battery pack 201 provides auxiliary or instantaneous power support; and when the power demand is low or the fuel cell 202 is maintained, the lithium battery pack 201 assumes the main power supply task. In other embodiments, when any one of the new energy batteries fails or is unavailable, the uninterrupted power supply of the auxiliary power supply is achieved through the remaining new energy batteries.

[0068] Optional, in Figure 1 In an embodiment, the plurality of main power supply units 200 include a DC uninterruptible power supply 203 .

[0069] Specifically, in some embodiments, the ship is equipped with a generator to provide power to the DC uninterruptible power supply 203, and the DC uninterruptible power supply 203 interacts with other new energy sources to achieve uninterruptible auxiliary power supply. The parallel redundant design of the main power supply unit 200 allows the number of the main power supply units 200 to be flexibly increased or decreased according to actual needs.

[0070] Optional, in Figure 2 In an embodiment, one of the at least one charge and discharge control unit 600 includes:

[0071] A second unidirectional conduction module 601 is provided in the charging circuit, and comprises a third end and a fourth end, which are respectively coupled to the at least one backup power supply unit 300 and the power switching unit 500;

[0072] The second unidirectional conduction module 601 is configured to unidirectionally conduct the conduction path from the third end to the fourth end based on the voltage difference between the third end and the fourth end, so as to conduct the charging circuit;

[0073] A backup voltage stabilizing device 602, coupled between the second unidirectional conducting module 601 and the at least one backup power supply unit 300;

[0074] A third unidirectional conducting module 603 is provided in the discharge circuit, and comprises a fifth end and a sixth end, which are respectively coupled to the auxiliary power output end 400 and the at least one backup power unit 300;

[0075] The third unidirectional conduction module 603 is configured to unidirectionally conduct the conduction path from the sixth end to the fifth end based on a voltage difference between the fifth end and the sixth end, so as to conduct the discharge circuit.

[0076] Specifically, in some embodiments, the second unidirectional conductor includes a third terminal and a fourth terminal, the third terminal is coupled to at least one backup power supply unit 300, and the fourth terminal is connected to the power switching unit 500. Only when the voltage of the third terminal (backup power supply unit 300) is lower than that of the fourth terminal (power switching unit 500), a forward bias is formed, and a current path from the third terminal to the fourth terminal is unidirectionally conducted, thereby realizing an effective charging process from the power switching unit 500 to the backup power supply unit 300. The implementation principles of the second unidirectional conduction module 601 and the third unidirectional conduction module 603 are the same as those of the first unidirectional conduction module 501, and are not described in detail herein.

[0077] The backup voltage stabilizing device 602 is located between the second unidirectional conductive device and the backup power supply unit 300 and is used to stabilize the voltage during the charging process to ensure that the charging process is both efficient and safe and to prevent overvoltage from damaging the backup power supply unit 300.

[0078] The charge and discharge control unit 600 realizes the charge and discharge switching of the backup power supply unit 300 through the integrated second and third unidirectional conduction devices. When the power provided by the main power supply unit 200 or other external power sources is sufficient, the charge and discharge control unit 600 charges the backup power supply unit 300 through the second unidirectional conduction device, and the backup voltage stabilizing device 602 maintains the voltage stability of the charging process to ensure the charging efficiency and battery health. When the main power supply unit 200 or other external power sources do not provide power, the third unidirectional conduction device is turned on to release the energy of the backup power supply, which is supplemented to the auxiliary power supply output terminal 400 through the discharge line to ensure uninterrupted power supply.

[0079] Optional, in Figure 1 In the embodiment, it also includes:

[0080] A plurality of main voltage stabilizing devices 700 are coupled between each of the main power supply units 200 and each of the power switching units 500 in a one-to-one correspondence.

[0081] Specifically, in some embodiments, a main voltage stabilizing device 700 is provided between each main power supply unit 200 and the corresponding power switching unit 500. The main voltage stabilizing device 700 is used to accurately regulate the voltage of the electric energy output by the main power supply unit 200, ensuring that the output voltage is stable within a predetermined range and is not affected by input voltage fluctuations. In this way, even if the output of the main power supply fluctuates, the electric energy processed by the voltage stabilizing device can meet the high requirements of precision equipment for voltage stability.

[0082] Each main voltage stabilizing device 700 has an integrated voltage regulating circuit that can monitor the output voltage in real time and automatically adjust it according to the set target voltage to ensure the stability and accuracy of the output voltage. In addition to the basic voltage stabilizing function, the main voltage stabilizing device 700 may also have an overload protection mechanism that can respond quickly to cut off or limit the current when it detects that the output current exceeds the safe range, protecting the back-end load and power system from damage.

[0083] Optional, in Figure 1 In an embodiment, the at least one backup power supply unit 300 includes a lead-acid battery 301 .

[0084] Specifically, in some embodiments, the at least one backup power supply unit 300 is composed of one or more groups of lead-acid batteries 301, which are connected in series or in parallel to achieve the required voltage and capacity requirements. The lead-acid batteries 301 are charged by the main power supply unit when the main power supply unit 200 in the auxiliary power supply system 100 is normally powered, and are discharged when the main power supply unit 200 is not powered to ensure the normal output of the auxiliary power supply.

[0085] Optional, in Figure 1 In the embodiment, it also includes:

[0086] An AC power supply unit 800, wherein an input end of the AC power supply unit 800 is coupled to the mains, and an output end of the AC power supply is coupled to the auxiliary power supply output end 400 and / or the at least one backup power supply unit 300;

[0087] A bidirectional control unit 900, coupled between the AC power supply unit 800 and the auxiliary power supply output terminal 400, including a backup discharge circuit connected between the AC power supply unit 800 and the auxiliary power supply output terminal 400, and a backup charging circuit connected between the AC power supply unit 800 and the at least one backup power supply unit 300;

[0088] The bidirectional control unit 900 turns on the backup discharge circuit and the backup charging circuit according to the output signal formed at the auxiliary power supply output terminal 400 when the first output circuit is disconnected and the charging circuit is disconnected;

[0089] The bidirectional control unit 900 disconnects the backup discharge circuit and the backup charging circuit according to the output signal formed when the first output circuit is turned on at the auxiliary power output terminal 400 .

[0090] Specifically, in some embodiments, the AC power supply unit 800 is used to receive mains power input, with its input end coupled to the mains network and its output end connected to the auxiliary power output end 400 and at least one backup power supply unit 300. When the ship is docked, the AC power supply unit 800 is connected to the mains.

[0091] When all the main power supply units 200 and the backup power supply units 300 are unavailable, the AC power supply unit 800 is connected to the AC power supply to charge the backup power supply unit 300 through the backup charging line, and the auxiliary power supply output terminal 400 is provided with output auxiliary power through the backup discharging line;

[0092] When all the main power supply units 200 are unavailable, but the backup power supply unit 300 is still available, after the AC power supply unit 800 is coupled, the auxiliary power supply is provided to the auxiliary power supply output terminal 400 through the AC power supply unit 800, and at this time the backup power supply unit 300 does not provide auxiliary power, but is charged through the AC power supply unit 800.

[0093] When any main power supply unit 200 is available, the backup power supply unit 300 is in a charging state, and if the AC power supply unit 800 is in a connected state, it supplies power to the backup power supply unit 300. In some embodiments, at this time, the bidirectional control unit 900 can also output a part of the power output of the main power supply as an AC output to provide it to other electrical appliances on the ship.

[0094] In yet another embodiment of the present disclosure, a DC power distribution cabinet is provided, which includes the auxiliary power supply system 100 described in any one of the above embodiments.

[0095] In yet another embodiment of the present disclosure, a ship carrier is provided, which includes the DC distribution cabinet mentioned above to obtain auxiliary power supply.

[0096] Specifically, in some embodiments, the ship carrier can be an ocean-going ship. The auxiliary power system of an ocean-going ship is a core component to ensure the safe and efficient operation of the ship, and is mainly responsible for providing stable power for all electrical equipment on the ship except the main propulsion system. These equipment include but are not limited to: navigation and communication equipment: such as radar, GPS navigation system, automatic identification system (AIS), satellite communication equipment, etc., which are essential for ship positioning, route planning and external communications; shipboard living facilities: such as lighting systems, air conditioning, kitchen equipment, fresh water preparation and sewage treatment systems, to ensure the living comfort and sanitary conditions of the crew. Fire and safety systems: including fire pumps, emergency lighting, and alarm systems, which are essential for ship safety. Hydraulic systems and pumps: serve steering gears, cranes, hatch cover opening and closing, etc., and are essential for ship control and cargo loading and unloading operations. Emergency equipment: such as emergency generators and lifeboat starting power supplies, to ensure that the ship can still maintain basic operation and safe evacuation when the main power fails. However, in the related art, the auxiliary power supply of the ocean-going vessel is provided by an uninterruptible power supply, and the battery pack is used as a backup power supply. However, if there is a problem with the uninterruptible power supply and the battery pack, there is no other auxiliary power supply to provide stable power to all electrical equipment of the ocean-going vessel except the main propulsion system. In some embodiments, the ship carrier includes a DC distribution cabinet, and the auxiliary power supply is realized by multiple main power supplies in the auxiliary power supply system of the DC distribution cabinet. The multiple main power supplies realize continuous switching between the auxiliary power supplies, ensuring the stability of the power supply.

[0097] The above embodiments are merely illustrative of the principles and effects of the present disclosure, and are not intended to limit the present disclosure. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present disclosure. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the present disclosure shall still be covered by the protection scope of the present disclosure.

Claims

1. Auxiliary power supply system, characterized in that, Applied to ships; The auxiliary power system is used to supply power to the auxiliary power unit of the ship, and includes: Multiple main power supply units and at least one backup power supply unit; A plurality of power switching units are coupled one by one between each main power unit and an auxiliary power output terminal, and are configured to connect / disconnect the first output line from the main power unit to the auxiliary power output terminal based on the availability / unavailability of the connected main power unit; At least one charge and discharge control unit, coupled between each of the at least one backup power supply unit and the auxiliary power supply output terminal, including a discharge circuit connected between the at least one backup power supply unit and the auxiliary power supply output terminal, and a charge circuit connected between the power switching unit and the at least one backup power supply unit; The at least one charge and discharge control unit turns on the discharge circuit and turns off the charge circuit according to an output signal formed at the auxiliary power supply output terminal when all the first output circuits are disconnected; The at least one charge and discharge control unit turns on the charging circuit and turns off the discharging circuit according to an output signal formed at the auxiliary power supply output terminal when at least one of the first output circuits is turned on.

2. The auxiliary power supply system according to claim 1, characterized in that: One of the at least one power switching unit comprises: A first unidirectional conductive module, wherein the first unidirectional conductive module comprises a first end and a second end; The first end is coupled to one of the plurality of main power supply units, and the second end is coupled to the auxiliary power supply output end; The first unidirectional conduction module is configured to unidirectionally conduct a conduction path from the first end to the second end based on a voltage difference between the first end and the second end.

3. The auxiliary power supply system according to claim 1, characterized in that: The multiple main power supply units include a new energy power supply, and the new energy power supply includes a lithium battery pack and / or a fuel cell.

4. The auxiliary power supply system according to claim 1, characterized in that: The plurality of primary power supply units include a direct current uninterruptible power supply.

5. The auxiliary power supply system according to claim 1, characterized in that: One of the at least one charge and discharge control units comprises: A second unidirectional conduction module is provided in the charging circuit, and comprises a third end and a fourth end, which are respectively coupled to the at least one backup power supply unit and the power switching unit; The second unidirectional conduction module is configured to unidirectionally conduct the conduction path from the third end to the fourth end based on the voltage difference between the third end and the fourth end, so as to conduct the charging line; A backup voltage stabilizing device, coupled between the second unidirectional conduction module and the at least one backup power supply unit; A third unidirectional conduction module, disposed in the discharge circuit, comprises a fifth end and a sixth end, which are respectively coupled to the auxiliary power supply output end and the at least one backup power supply unit; The third unidirectional conduction module is configured to unidirectionally conduct a conduction path from the sixth terminal to the fifth terminal based on a voltage difference between the fifth terminal and the sixth terminal, so as to conduct the discharge line.

6. The auxiliary power supply system according to claim 1, characterized in that: Also includes: A plurality of main voltage stabilizing devices are coupled between each of the main power supply units and each of the power switching units in a one-to-one correspondence.

7. The auxiliary power supply system according to claim 1, characterized in that: The at least one backup power supply unit comprises a lead-acid battery.

8. The auxiliary power supply system according to claim 1, characterized in that: Also includes: An AC power supply unit, wherein an input end of the AC power supply unit is coupled to the mains, and an output end of the AC power supply unit is coupled to the auxiliary power supply output end and / or the at least one backup power supply unit; a bidirectional control unit, coupled between the AC power supply unit and the auxiliary power supply output terminal, comprising a backup discharge circuit connected between the AC power supply unit and the auxiliary power supply output terminal, and a backup charging circuit connected between the AC power supply unit and the at least one backup power supply unit; The bidirectional control unit turns on the backup discharge circuit and the backup charging circuit according to an output signal formed at the auxiliary power supply output terminal when the first output circuit is disconnected and the charging circuit is disconnected; The bidirectional control unit disconnects the backup discharge circuit and the backup charging circuit according to an output signal formed at the auxiliary power supply output end when the first output circuit is turned on.

9. A DC power distribution cabinet, characterized in that: Comprising the auxiliary power supply system as described in any one of claims 1-8.

10. A ship carrier, characterized in that: Includes a DC distribution cabinet as described in claim 9 to obtain auxiliary power supply.

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