DC power supply conversion system for marine container

Abstract

The utility model relates to the field of marine container power supply, and provides a marine container direct current power supply conversion system, which comprises a battery module, a high-voltage box module, a confluence cabinet, a liquid cooling unit power supply module and a charging gun module, and is characterized in that the battery module is electrically connected with the high-voltage box module and is used for providing electric energy; the high-voltage box module is electrically connected with the confluence cabinet and the liquid cooling unit power supply module and is used for transmitting battery high voltage; the confluence cabinet is electrically connected with the high-voltage box module and is used for centralizing a power supply; the liquid cooling unit power supply module is electrically connected with the high-voltage box module and is used for supplying power to the liquid cooling unit; and the charging gun module is electrically connected with the confluence cabinet and is used for charging the battery. The battery pack directly supplies power to the liquid cooling unit by selecting the power supply module of the liquid cooling unit, meanwhile, the power of the battery pack is converted into rear-end alternating current through the high-voltage box module, the direct conversion efficiency of the battery pack is higher, the conversion efficiency is high, meanwhile, the cost is saved, multiple subsystems are integrated through the fault response module, and the fault response efficiency is improved. And the container DC power supply conversion system can deal with various types of faults.

Description

Technical Field

[0001] The utility model relates to the field of power supply for marine containers, and particularly to a DC power supply conversion system for marine containers. Background Technique

[0002] The power supply of the marine container control system is an important link to ensure the normal operation and maintenance of the container during the operation of the ship. With the development of global trade, the demand for container transportation is increasing continuously, and the application of the marine container control system is becoming more and more extensive to improve the safety, efficiency and traceability of goods. Generally, the marine containers of the existing marine container control system use the on-board AC power supply device to supply power to the marine container liquid cooling unit and the backend UPS. However, the conversion efficiency is low. There is also another way, that is, an inverter is added inside the container battery system for voltage conversion. However, the cost is relatively high.

[0003] Chinese Patent with publication number CN112968224A discloses a marine multi-system containerized power battery unit and its system architecture, which performs inverter conversion on the power supply by connecting an inverter and a DC-DC chopper module to a DC busbar. However, the conversion efficiency of this system architecture is relatively low, and there is a lack of perfect protection measures and it cannot cope with different types of faults. Summary of the Utility Model

[0004] In view of this, the utility model provides a DC power supply conversion system for marine containers. By selecting a liquid cooling unit power supply module, the battery pack directly supplies power to the liquid cooling unit. At the same time, the power of the battery pack is converted into backend alternating current through the high-voltage box module. The direct conversion efficiency is higher, the conversion efficiency is fast, and the cost is saved at the same time. In addition, multiple subsystems are integrated to ensure that the container DC power supply conversion system can cope with various types of faults, so as to solve the problems of low conversion efficiency and lack of perfect protection measures in the existing power supply conversion system.

[0005] The technical solution of the utility model is realized as follows: A DC power supply conversion system for marine containers, the system includes a battery module, a high-voltage box module, a busbar cabinet, a liquid cooling unit power supply module and a charging gun module:

[0006] The battery module is electrically connected to the high-voltage box module and is used to provide electrical energy;

[0007] The high-voltage box module is electrically connected to the busbar cabinet and the liquid cooling unit power supply module respectively and is used to transmit the battery high voltage;

[0008] The busbar cabinet is electrically connected to the high-voltage box module and is used to concentrate the power supply;

[0009] The liquid cooling unit power supply module is electrically connected to the high-voltage box module and is used to supply power to the liquid cooling unit;

[0010] The charging gun module is electrically connected to the busbar cabinet and is used to charge the battery.

[0011] Based on the above technical solutions, preferably, the system further includes a fault response module, which is electrically connected to the high-voltage box module and is used to handle different types of faults.

[0012] Based on the above technical solutions, preferably, the fault response module includes switch QFB3, switch QFC1, switch QFC2, switch QFC3, switch QFC7, dedicated line plug CZ2, uninterruptible power supply UPS, battery P1, BMS power supply, AC control power supply, and fire protection power supply;

[0013] The two output terminals of switch QFB3 are respectively electrically connected to dedicated line plug CZ2. The two output terminals of dedicated line plug CZ2 are respectively electrically connected to the two input terminals of uninterruptible power supply UPS. The positive and negative poles of uninterruptible power supply UPS are respectively electrically connected to the two input terminals of switch QFC1. The two output terminals of switch QFC1 are respectively electrically connected to the positive and negative poles of battery P1. The live wire terminal and neutral wire terminal of uninterruptible power supply UPS are respectively electrically connected to the two input terminals of switch QFC2, switch QFC3, and switch QFC7. The two output terminals of switch QFC2, switch QFC3, and switch QFC7 are respectively electrically connected to BMS power supply, AC control power supply, and fire protection power supply, and are used to provide BMS power supply, alternating current, and fire protection power supply.

[0014] Based on the above technical solutions, preferably, the fault response module further includes switches QFC4 - QFC6, a video surveillance switch, a fire alarm, and a fan control;

[0015] The two input terminals of switches QFC4 - QFC6 are respectively electrically connected to the live wire terminal and neutral wire terminal of uninterruptible power supply UPS. The two output terminals of switches QFC4 - QFC6 are respectively electrically connected to the video surveillance switch, the fire alarm, and the fan control, and are used to conduct video surveillance, fire alarm, and fan control.

[0016] Based on the above technical solutions, preferably, the fault response module further includes switch QFC8 and debugging plug CZ3;

[0017] The input terminal of switch QFC8 is electrically connected to the live wire terminal of uninterruptible power supply UPS. The output terminal of switch QFC8 and the neutral wire of uninterruptible power supply UPS are respectively electrically connected to the two input terminals of debugging plug CZ3, and are used to conduct functional debugging.

[0018] Based on the above technical solutions, preferably, the battery module includes 9 groups of battery cassettes, each group of battery cassettes includes 8 battery cassettes, the 8 battery cassettes in each group are connected end to end, the positive extreme of each group of battery cassettes is electrically connected to the positive power supply terminal of the high-voltage box module, and the negative extreme of each group of battery cassettes is electrically connected to the negative power supply terminal of the high-voltage box module.

[0019] Based on the above technical solutions, preferably, the high-voltage box module includes 9 high-voltage boxes, battery pack U1 and AC / DC power conversion module PS1. The battery pack U1 is used to provide 600 - 876V high-voltage direct current, and the AC / DC power conversion module PS1 is used to convert 600 - 876V high-voltage direct current into 220V alternating current;

[0020] Each high-voltage box is respectively electrically connected to 1 group of battery cassettes. The positive output of the high-voltage box is electrically connected to the positive wire P+, the negative output of the high-voltage box is electrically connected to the negative wire P-. The live wire of the battery pack U1 is electrically connected to the positive wire P+, the neutral wire of the battery pack U1 is electrically connected to the negative wire P-, the ground wire of the battery pack U1 is grounded. The two output terminals of the battery pack U1 are respectively electrically connected to the AC / DC power conversion module PS1, and the two output terminals of the AC / DC power conversion module are respectively electrically connected to the two input terminals of the switch QFB3.

[0021] Based on the above technical solutions, preferably, the busbar cabinet includes resistor R1, DC circuit breaker QFZ, fuse resistors FU1, FU2, and photovoltaic surge protector SPD1;

[0022] One end of the resistor R1 is electrically connected to the positive wire P+, the other end of the resistor R1 is electrically connected to the first input terminal of the DC circuit breaker QFZ. The second input terminal of the DC circuit breaker QFZ is electrically connected to the negative wire P-. The first output terminal of the DC circuit breaker QFZ is respectively electrically connected to one end of the fuse resistor FU1 and the charging gun module. The other end of the fuse resistor FU1 is electrically connected to one end of the photovoltaic surge protector SPD1. The other end of the photovoltaic surge protector SPD1 is electrically connected to one end of the fuse resistor FU2. The other end of the fuse resistor FU2 and the second output terminal of the photovoltaic surge protector SPD1 are both electrically connected to the charging gun module.

[0023] Based on the above technical solutions, preferably, the charging gun module includes 4 charging seats. The charging seats are respectively electrically connected to 1 charging gun and are used to charge the battery. The 4 charging seats are connected in parallel and are respectively electrically connected to the first output terminal and the second output terminal of the DC circuit breaker QFZ.

[0024] Based on the above technical solutions, preferably, the liquid cooling unit power supply module includes a switch group QFB1 and a corresponding number of liquid cooling units;

[0025] Two input terminals of the switch group QFB1 are electrically connected to two output terminals of the battery pack U1 respectively, and multiple output terminals of the switch group QFB1 are electrically connected to a corresponding number of liquid cooling units respectively, for supplying power to the liquid cooling units.

[0026] A DC power supply conversion system for marine containers provided by the present utility model has the following beneficial effects compared with the prior art:

[0027] (1) By selecting the liquid cooling unit power supply module, the battery pack directly supplies power to the liquid cooling unit. At the same time, the power of the battery pack is converted into alternating current at the rear end through the high-voltage box module. The direct conversion efficiency is higher, the conversion efficiency is fast, and the cost is saved. And by integrating multiple subsystems in the fault response module, it is ensured that the container DC power supply conversion system can handle various types of faults;

[0028] (2) Through the high-voltage box module, the conversion of high-voltage direct current to alternating current is realized. It not only retains the advantages of high-voltage direct current, such as high transmission efficiency and low loss, but also meets the demand of the marine container control system for 220V alternating current through AC / DC conversion, meeting the power supply demand of the system;

[0029] (3) By integrating multiple switches and power management components in the fault response module, the monitoring and management of the system power supply are realized. When a fault occurs, the power supply can be quickly switched to ensure the stable supply of the functions of BMS power supply, alternating current, fire-fighting power supply, video monitoring switch, fire alarm and fan control. The configuration of the switch QFC8 and the debugging plug CZ3 enables the system to perform function debugging, realizing the efficient management of the power supply and monitoring system, and ensuring the normal operation of key functions even in case of faults. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 It is a structural diagram of a DC power supply conversion system for a marine container of the present utility model;

[0032] Figure 2 It is a wiring diagram of the battery module of the present utility model;

[0033] Figure 3 It is a wiring diagram of the high-voltage box module of the present utility model;

[0034] Figure 4 This is the wiring diagram of the busbar cabinet of the present utility model;

[0035] Figure 5 This is the wiring diagram of the charging gun module of the present utility model;

[0036] Figure 6 This is the wiring diagram of the liquid cooling unit power supply module of the present utility model;

[0037] Figure 7 This is the wiring diagram of the fault response module of the present utility model;

[0038] Figure 8 This is the wiring diagram of a DC power supply conversion system for marine containers of the present utility model. Detailed implementation manners

[0039] Next, in combination with the implementation manners of the present utility model, the technical solutions in the implementation manners of the present utility model will be clearly and completely described. Obviously, the described implementation manners are only a part of the implementation manners of the present utility model, rather than all of the implementation manners. Based on the implementation manners in the present utility model, all other implementation manners obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0040] Please refer to Figure 1 , this embodiment provides a DC power supply conversion system for marine containers, and the system includes a battery module 1, a high-voltage box module 2, a busbar cabinet 3, a liquid cooling unit power supply module 4, and a charging gun module 5:

[0041] The battery module 1 is electrically connected to the high-voltage box module 2 and is used to provide electrical energy;

[0042] The high-voltage box module 2 is respectively electrically connected to the busbar cabinet 3 and the liquid cooling unit power supply module 4 and is used to transmit the battery high voltage;

[0043] The busbar cabinet 3 is electrically connected to the high-voltage box module 2 and is used to centralize the power supply;

[0044] The liquid cooling unit power supply module 4 is electrically connected to the high-voltage box module 2 and is used to supply power to the liquid cooling unit;

[0045] The charging gun module 5 is electrically connected to the busbar cabinet 3 and is used to charge the battery.

[0046] The system further includes a fault response module 6, and the fault response module 6 is electrically connected to the high-voltage box module 2 and is used to handle different types of faults.

[0047] As Figure 8 shown, it is the overall wiring diagram of a DC power supply conversion system for marine containers.

[0048] Specifically, a DC power supply conversion system for marine containers in this embodiment adopts structures such as a battery module 1 and a high-voltage box module 2, realizing functions such as battery power supply and high-voltage transmission, and having a higher conversion efficiency compared with existing systems.

[0049] A fault response module 6 is added, including various switches, an uninterruptible power supply (UPS), etc., which can handle different types of faults and improve the reliability of the system. Circuit breakers, surge protection and other measures are added to key components such as the busbar cabinet 3 to further enhance the safety of the system.

[0050] This DC power supply conversion system for marine containers solves the problems of low power supply efficiency and poor reliability of existing systems by means of optimizing the system architecture, enhancing the fault response ability, and improving the performance of key links, achieving higher power supply efficiency, safety and reliability.

[0051] As Figure 2 shown, the battery module 1 includes 9 groups of battery cassettes, each group of battery cassettes includes 8 battery cassettes, the 8 battery cassettes in each group of battery cassettes are connected end to end, the positive terminal of each group of battery cassettes is electrically connected to the positive power supply terminal of the high-voltage box module 2, and the negative terminal of each group of battery cassettes is electrically connected to the negative power supply terminal of the high-voltage box module 2.

[0052] Specifically, the battery module 1 adopts a structure of 9 groups of battery cassettes, each group contains 8 battery cassettes, and they are connected in an end-to-end manner. The positive terminal of each group of battery cassettes is electrically connected to the positive power supply terminal of the high-voltage box module 2, and the negative terminal is electrically connected to the negative power supply terminal of the high-voltage box module 2. This not only increases the battery capacity and improves the power supply ability, but also improves the reliability and redundancy of the system through the parallel connection of multiple groups of batteries. When a certain group of batteries fails, the other groups of batteries can still continue to supply power, avoiding the paralysis of the entire system caused by a single-point failure. At the same time, this structure is also conducive to the management and maintenance of the batteries. Therefore, the battery module 1 improves the power supply ability and reliability of the system and enhances the overall performance of the system.

[0053] As Figure 3 shown, the high-voltage box module 2 includes 9 high-voltage boxes, a battery pack U1 and an AC / DC power conversion module PS1. The battery pack U1 is used to provide 600 - 876V high-voltage direct current, and the AC / DC power conversion module PS1 is used to convert 600 - 876V high-voltage direct current into 220V alternating current;

[0054] Each high-voltage box is electrically connected to one set of battery plug boxes respectively. The positive output of the high-voltage box is electrically connected to the positive electrode wire P+, and the negative output of the high-voltage box is electrically connected to the negative electrode wire P-. The live wire of the battery pack U1 is electrically connected to the positive electrode wire P+, the neutral wire of the battery pack U1 is electrically connected to the negative electrode wire P-, the ground wire of the battery pack U1 is grounded, and the two output terminals of the battery pack U1 are respectively electrically connected to the AC / DC power conversion module PS1. The two output terminals of the AC / DC power conversion module are respectively electrically connected to the two input terminals of the switch QFB3.

[0055] Specifically, the high-voltage box module 2 includes nine high-voltage boxes, a battery pack U1, and an AC / DC power conversion module PS1. Among them, the battery pack U1 is used to provide high-voltage direct current of 600 - 876V, and the AC / DC power conversion module PS1 converts this high-voltage direct current into 220V alternating current. Each high-voltage box is electrically connected to one set of battery plug boxes respectively, converting the electrical energy provided by the battery module 1 into high-voltage direct current. The positive output of the high-voltage box is connected to the positive electrode wire P+, and the negative output is connected to the negative electrode wire P-. The live wire and the neutral wire of the battery pack U1 are respectively connected to the positive and negative electrode wires, and the ground wire is grounded. The output terminals of the battery pack U1 are then connected to the AC / DC power conversion module PS1 to convert the high-voltage direct current into 220V alternating current. The high-voltage box module 2 realizes the conversion of high-voltage direct current of the battery module 1 into alternating current, retaining the advantages of high-voltage direct current such as high transmission efficiency and low loss, and meeting the demand for 220V alternating current of the marine container control system through AC / DC conversion. The high-voltage box module 2 realizes the efficient conversion of high-voltage direct current powered by the battery into alternating current, meeting the power supply requirements of the system.

[0056] As Figure 4 shown, the busbar cabinet 3 includes a resistor R1, a DC circuit breaker QFZ, fuse resistors FU1, FU2, and a photovoltaic surge protector SPD1;

[0057] One end of the resistor R1 is electrically connected to the positive electrode wire P+, the other end of the resistor R1 is electrically connected to the first input terminal of the DC circuit breaker QFZ, the second input terminal of the DC circuit breaker QFZ is electrically connected to the negative electrode wire P-, the first output terminal of the DC circuit breaker QFZ is respectively electrically connected to one end of the fuse resistor FU1 and the charging gun module 5, the other end of the fuse resistor FU1 is electrically connected to one end of the photovoltaic surge protector SPD1, the other end of the photovoltaic surge protector SPD1 is electrically connected to one end of the fuse resistor FU2, and the other end of the fuse resistor FU2 and the second output terminal of the photovoltaic surge protector SPD1 are both electrically connected to the charging gun module 5.

[0058] Specifically, the busbar cabinet 3 includes components such as a resistor R1, a DC circuit breaker QFZ, fuse resistors FU1 and FU2, and a photovoltaic surge protector SPD1. Among them, one end of the resistor R1 is connected to the positive wire P+, and the other end is connected to the first input terminal of the DC circuit breaker QFZ. The second input terminal of the DC circuit breaker QFZ is connected to the negative wire P-. The first output terminal of the DC circuit breaker QFZ is respectively connected to the fuse resistor FU1 and the charging gun module 5. The other end of the fuse resistor FU1 is connected to one end of the photovoltaic surge protector SPD1, the other end of the SPD1 is connected to one end of the fuse resistor FU2, and the other ends of the FU2 and the second output terminal of the SPD1 are both connected to the charging gun module 5. While concentrating the power supply, the busbar cabinet 3 also adds protection measures such as circuit breakers, fuse resistors, and surge protection. When faults such as overload or short circuit occur, the circuit breaker can cut off the circuit in time, the fuse resistor can protect key equipment, and the surge protector can prevent damage to the system caused by high-voltage surges. The busbar cabinet 3 realizes the centralized management of the power supply and enhances the overall fault protection ability.

[0059] As Figure 5 shown, the charging gun module 5 includes 4 charging seats, and the charging seats are respectively electrically connected to 1 charging gun for charging the battery. The 4 charging seats are connected in parallel and are respectively electrically connected to the first output terminal and the second output terminal of the DC circuit breaker QFZ.

[0060] Specifically, the charging gun module 5 is composed of 4 charging seats. Each charging seat is electrically connected to a charging gun for charging the battery. The 4 charging seats are connected in parallel and are respectively connected to the first output terminal and the second output terminal of the DC circuit breaker QFZ. This improves the flexibility and efficiency of charging, enabling multiple batteries to be charged simultaneously. Moreover, the parallel connection method enhances the redundancy of the system, ensuring that other charging seats can still work when a certain charging seat fails.

[0061] As Figure 6 shown, the liquid cooling unit power supply module 4 includes a switch group QFB1 and a corresponding number of liquid cooling units;

[0062] Two input terminals of the switch group QFB1 are respectively electrically connected to two output terminals of the battery pack U1, and multiple output terminals of the switch group QFB1 are respectively electrically connected to a corresponding number of liquid cooling units for supplying power to the liquid cooling units.

[0063] Specifically, the power supply module 4 of the liquid cooling unit consists of a switch group QFB1 and a corresponding number of liquid cooling units. Two input terminals of the switch group QFB1 are electrically connected to two output terminals of the battery pack U1, and its multiple output terminals are respectively electrically connected to the liquid cooling units to supply power to the liquid cooling units. Through the configuration of the switch group, the power supply of the liquid cooling units can be flexibly controlled to achieve precise management and regulation of the liquid cooling system. Therefore, the technical effect of the power supply module 4 of the liquid cooling unit is to achieve efficient and stable power supply for the liquid cooling unit.

[0064] As Figure 7 shown, the fault response module 6 includes switch QFB3, switch QFC1, switch QFC2, switch QFC3, switch QFC7, dedicated line plug CZ2, uninterruptible power supply UPS, battery P1, BMS power supply, AC control power supply, and fire power supply;

[0065] Two output terminals of the switch QFB3 are respectively electrically connected to the dedicated line plug CZ2. Two output terminals of the dedicated line plug CZ2 are respectively electrically connected to two input terminals of the uninterruptible power supply UPS. The positive and negative poles of the uninterruptible power supply UPS are respectively electrically connected to two input terminals of the switch QFC1. Two output terminals of the switch QFC1 are respectively electrically connected to the positive and negative poles of the battery P1. The live wire terminal and neutral wire terminal of the uninterruptible power supply UPS are respectively electrically connected to two input terminals of the switch QFC2, switch QFC3, and switch QFC7. Two output terminals of the switch QFC2, switch QFC3, and switch QFC7 are respectively electrically connected to the BMS power supply, AC control power supply, and fire power supply to provide BMS power supply, alternating current, and fire power supply.

[0066] The fault response module 6 further includes switches QFC4 - QFC6, a video monitoring switch, a fire alarm, and a fan control;

[0067] Two input terminals of the switches QFC4 - QFC6 are respectively electrically connected to the live wire terminal and neutral wire terminal of the uninterruptible power supply UPS. Two output terminals of the switches QFC4 - QFC6 are respectively electrically connected to the video monitoring switch, the fire alarm, and the fan control to perform video monitoring, fire alarm, and fan control.

[0068] The fault response module 6 further includes a switch QFC8 and a debugging plug CZ3;

[0069] The input terminal of the switch QFC8 is electrically connected to the live wire terminal of the uninterruptible power supply UPS. The output terminal of the switch QFC8 and the neutral wire of the uninterruptible power supply UPS are respectively electrically connected to two input terminals of the debugging plug CZ3 for function debugging.

[0070] Specifically, the fault response module 6 integrates multiple switches and power management components, including switches QFB3, QFC1, QFC2, QFC3, QFC7, UPS, uninterruptible power supply, battery P1, etc., for realizing the monitoring and management of system power supply. When a fault occurs, the fault response module 6 can quickly switch the power supply to ensure the stable supply of BMS power supply, alternating current and fire power supply. At the same time, through the connection of switches QFC4 - QFC6 to the video monitoring switch, fire alarm and fan control, the effective management of safety monitoring and environmental control is realized. In addition, the configuration of switches QFC8 and debugging plug CZ3 enables the system to conduct function debugging, improving the convenience of maintenance. The fault response module 6 enhances the security and reliability of the system, realizes the efficient management of the power supply and monitoring system, and ensures the normal operation of key functions under fault conditions.

[0071] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A DC power supply conversion system for marine containers, characterized in that, The system includes a battery module (1), a high-voltage box module (2), a busbar cabinet (3), a liquid cooling unit power supply module (4), and a charging gun module (5): The battery module (1) is electrically connected to the high-voltage box module (2) and is used to provide electrical energy; The high-voltage box module (2) is electrically connected to the busbar cabinet (3) and the liquid cooling unit power supply module (4) respectively, and is used to transmit the high voltage of the battery; The busbar cabinet (3) is electrically connected to the high-voltage box module (2) and is used to centralize the power supply; The liquid cooling unit power supply module (4) is electrically connected to the high-voltage box module (2) and is used to supply power to the liquid cooling unit; The charging gun module (5) is electrically connected to the busbar cabinet (3) and is used to charge the battery; The system further includes a fault response module (6), and the fault response module (6) is electrically connected to the high-voltage box module (2) and is used to handle different types of faults; The fault response module (6) includes switch QFB3, switches QFC1, QFC2, QFC3, QFC7, special line plug CZ2, uninterruptible power supply UPS, battery P1, BMS power supply, AC control power supply, and fire protection power supply; The two output terminals of switch QFB3 are respectively electrically connected to the special line plug CZ2, the two output terminals of the special line plug CZ2 are respectively electrically connected to the two input terminals of the uninterruptible power supply UPS, the positive and negative poles of the uninterruptible power supply UPS are respectively electrically connected to the two input terminals of switch QFC1, the two output terminals of switch QFC1 are respectively electrically connected to the positive and negative poles of the battery P1, the live wire terminal and the neutral wire terminal of the uninterruptible power supply UPS are respectively electrically connected to the two input terminals of switches QFC2, QFC3, and QFC7, and the two output terminals of switches QFC2, QFC3, and QFC7 are respectively electrically connected to the BMS power supply, the AC control power supply, and the fire protection power supply, and are used to provide BMS power supply, alternating current, and fire protection power supply.

2. The DC power supply conversion system for marine containers according to claim 1, characterized in that The fault response module (6) further includes switches QFC4 - QFC6, a video monitoring switch, a fire alarm, and a fan control; The two input terminals of switches QFC4 - QFC6 are respectively electrically connected to the live wire terminal and the neutral wire terminal of the uninterruptible power supply UPS, and the two output terminals of switches QFC4 - QFC6 are respectively electrically connected to the video monitoring switch, the fire alarm, and the fan control, and are used to perform video monitoring, fire alarm, and fan control.

3. The DC power supply conversion system for marine containers as claimed in claim 2, wherein, The fault response module (6) further includes switch QFC8 and debugging plug CZ3; The input terminal of switch QFC8 is electrically connected to the live wire terminal of the uninterruptible power supply UPS, and the output terminal of switch QFC8 and the neutral wire of the uninterruptible power supply UPS are respectively electrically connected to the two input terminals of the debugging plug CZ3, and are used to perform function debugging.

4. The DC power supply conversion system for marine containers according to claim 3, wherein, The battery module (1) includes 9 groups of battery cassettes, each group of battery cassettes includes 8 battery cassettes, the 8 battery cassettes in each group of battery cassettes are connected end to end, the positive extreme of each group of battery cassettes is electrically connected to the positive power supply terminal of the high-voltage box module (2), and the negative extreme of each group of battery cassettes is electrically connected to the negative power supply terminal of the high-voltage box module (2).

5. The DC power supply conversion system for marine containers according to claim 4, characterized in that The high-voltage box module (2) includes nine high-voltage boxes, a battery pack U1, and an AC / DC power conversion module PS1. The battery pack U1 is used to provide high-voltage direct current of 600 - 876V, and the AC / DC power conversion module PS1 is used to convert the high-voltage direct current of 600 - 876V into alternating current of 220V; Each high-voltage box is electrically connected to a group of battery plug boxes respectively. The positive output of the high-voltage box is electrically connected to the positive wire P+, the negative output of the high-voltage box is electrically connected to the negative wire P-. The live wire of the battery pack U1 is electrically connected to the positive wire P+, the neutral wire of the battery pack U1 is electrically connected to the negative wire P-, the ground wire of the battery pack U1 is grounded. The two output terminals of the battery pack U1 are respectively electrically connected to the AC / DC power conversion module PS1, and the two output terminals of the AC / DC power conversion module are respectively electrically connected to the two input terminals of the switch QFB3.

6. The DC power supply conversion system for marine containers according to claim 5, characterized in that, The busbar cabinet (3) includes a resistor R1, a DC circuit breaker QFZ, fuse resistors FU1, FU2, and a photovoltaic surge protector SPD1; One end of the resistor R1 is electrically connected to the positive wire P+, the other end of the resistor R1 is electrically connected to the first input terminal of the DC circuit breaker QFZ. The second input terminal of the DC circuit breaker QFZ is electrically connected to the negative wire P-. The first output terminal of the DC circuit breaker QFZ is respectively electrically connected to one end of the fuse resistor FU1 and the charging gun module (5). The other end of the fuse resistor FU1 is electrically connected to one end of the photovoltaic surge protector SPD1. The other end of the photovoltaic surge protector SPD1 is electrically connected to one end of the fuse resistor FU2. The other end of the fuse resistor FU2 and the second output terminal of the photovoltaic surge protector SPD1 are both electrically connected to the charging gun module (5).

7. The DC power supply conversion system for marine containers according to claim 6, characterized in that, The charging gun module (5) includes four charging seats. The charging seats are respectively electrically connected to a charging gun, and are used for charging the battery. The four charging seats are connected in parallel and are respectively electrically connected to the first output terminal and the second output terminal of the DC circuit breaker QFZ.

8. The DC power supply conversion system for marine containers according to claim 7, wherein The liquid-cooled unit power supply module (4) includes a switch group QFB1 and a corresponding number of liquid-cooled units; The two input terminals of the switch group QFB1 are respectively electrically connected to the two output terminals of the battery pack U1. The multiple output terminals of the switch group QFB1 are respectively electrically connected to the corresponding number of liquid-cooled units, and are used for supplying power to the liquid-cooled units.

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