A mobile charging device and method of operation

Abstract

The application relates to a mobile charging device and an operating method, and relates to the field of new energy electric ships, which comprises a winch container and a charging container installed on a ship, a high-voltage cable winch and a cable management system for automatically winding and unwinding cables are arranged in the winch container and used for connecting a high-voltage shore power of a wharf, and an isolation voltage reducing transformer and a charging converter are arranged in the charging container, so that high-voltage electric energy is converted into direct-current electric energy, and the direct-current electric energy is used for charging a battery of an electric ship. The application is favorable for optimizing a ship charging process, reducing construction and operation costs, and promoting the technical progress of a new energy ship industry.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of new energy electric ships, and in particular to a mobile charging device and an operating method. BACKGROUND

[0002] With the global emphasis on environmental protection and sustainable development, the field of new energy ships is booming. New energy electric ships gradually become a new trend in the industry due to their zero emissions, low noise and other advantages. However, in this emerging field, the charging problem of electric ships has become a key bottleneck restricting their further development. Currently, the industry generally adopts the following four modes to solve the charging needs of electric ships:

[0003] 1) Box-type power supply battery replacement mode: This mode uses a heavy box-type power supply to replace the battery on the ship by using a shore crane. However, this mode has significant drawbacks: the single box-type power supply weighs nearly 30 tons, which puts high demands on the carrying capacity and operating precision of the shore crane; at the same time, the battery replacement operation takes a long time, often occupying valuable loading and unloading time of the shore crane, reducing the overall operational efficiency of the port.

[0004] 2) Direct current charging cable on-board charging mode: This mode uses a single or multiple direct current charging cables to directly connect the shore power and the ship's battery for charging. However, the charging capacity of a single direct current cable is limited, making it difficult to meet the power needs of large ships; if multiple cables are used in parallel, the operation is complex, requiring additional manpower and equipment for cable laying, connection and storage, and the initial investment cost is high, which is not conducive to widespread promotion.

[0005] 3) On-board generator charging mode: Some ships use on-board fuel generators to charge the batteries. However, this mode is similar to traditional fuel-powered ships and still produces a large amount of carbon emissions and other pollutants, causing serious pollution to the environment, which is contrary to the environmental protection purpose of new energy ships.

[0006] 4) Shore power system with on-board fixed charger charging mode: The shore power system supplies power to the ship, which is converted by the fixed charger installed on the ship to charge the battery. However, this method has obvious shortcomings: the installation of the fixed charger on the ship occupies limited space resources, increases the self-weight of the ship, and also increases the construction cost and maintenance complexity of the ship.

[0007] The charging modes currently used in the field of new energy electric ships all have different degrees of limitations and drawbacks, making it difficult to meet the needs of the industry for efficient, environmentally friendly and economical charging solutions. Therefore, developing a new type of mobile charging device that can effectively overcome the above problems is of great significance to the healthy and sustainable development of the new energy electric ship industry. SUMMARY

[0008] The present application aims to overcome the problems of low efficiency, complex operation and environmental unfriendliness of the existing electric ship charging mode, and provides a mobile charging solution with high efficiency, safety and environmental protection.

[0009] In order to achieve the above-mentioned purpose, the technical scheme of the present application provides a mobile charging device, which comprises a winch container and a charging container installed on a ship, wherein the winch container is provided with a high-voltage cable winch for connecting a high-voltage shore power and a cable management system for automatically winding and unwinding the cable, and the charging container is provided with an isolation and voltage reduction transformer and a charging converter to convert high-voltage power into direct-current power for charging the battery of an electric ship.

[0010] Preferably, the cable management system uses a 6kV single cable and can automatically wind and unwind the cable according to the cable tension.

[0011] Preferably, the cable management system uses a ship-shore composite cable and has a last turn alarm and emergency stop function.

[0012] Preferably, the isolation and voltage reduction transformer reduces 6kV high voltage to 400V low voltage to meet the input voltage requirement of the charging converter.

[0013] Preferably, the charging converter converts 400V AC into 600V-1000V DC output to provide stable DC power supply for the electric ship.

[0014] Preferably, the charging container and the energy management system of the ship exchange data through a Can communication channel, and the S+ and S- jacks in the charging DC socket serve as communication interfaces for real-time communication with the energy management system of the ship.

[0015] Preferably, the high-voltage shore power connection distribution board has the functions of equipotential detection, emergency stop, overcurrent, overload and overvoltage protection, wherein the equipotential detection is realized by a configured equipotential detector, and the overcurrent, overload and overvoltage protection functions are realized by a configured comprehensive protection device.

[0016] Preferably, the winch container comprises a UPS for providing control power supply for the high-voltage shore power connection distribution board to ensure the continuous operation capability of the key components.

[0017] Preferably, the high-voltage cabinet maintenance trolley is used for the extraction maintenance of the circuit breaker of the high-voltage shore power connection distribution board.

[0018] The technical scheme of the present application further provides a mobile charging device operation method, which comprises the following steps:

[0019] Before charging, it is confirmed that the connecting cable between the charging container and the winch container has been correctly connected;

[0020] The AC board is powered by the power connection box of the ship, and the winch container is powered by the AC board;

[0021] The winch control box releases the winch cable to the wharf through a remote controller or a winch control panel;

[0022] The winch cable plug is inserted into the wharf shore power box;

[0023] After detecting that the safety loop is normal, the wharf closes the switch and sends 6kV to the high-voltage cabinet;

[0024] After receiving the "charge standby" instruction from the ship energy management system (EMS), the high-voltage cabinet closes the switch, and the charging converter starts;

[0025] After the charging converter starts, the "ready" state is fed back to the EMS;

[0026] After the EMS receives the "ready" state, it sends a "start" instruction to the charging control system of the charging container;

[0027] After the charging control system receives the "start instruction", the charging converter output switch closes, and the DC power is sent to the remote switching cabinet of the ship, and a "start complete" instruction is sent to the EMS;

[0028] After the EMS receives the "start complete" feedback, it controls the remote switching cabinet to pre-charge DC / DC1 and DC / DC2, and after pre-charging is completed, DC / DC1 and DC / DC2 are closed, DC / DC1 and DC / DC2 are started, connected to the DC distribution board of the ship, and the charger stabilizes the DC output power voltage at 1000V;

[0029] The EMS controls DC / DC3 to DC / DC8 connected to the battery pack to work and charge the box-type power supply, wherein the size of the charging current is realized by the EMS controlling the DC / DC, and the switching of the box-type power supply charging is realized by the EMS controlling the remote switching cabinet;

[0030] When stopping, first stop DC / DC3 to DC / DC8, then stop DC / DC1 and DC / DC2, then send a stop instruction to the charging control system, the charging converter stops, the output switch is opened, and a stop feedback is sent to the EMS;

[0031] During the charging process, when the charging system fails, a fault information is sent to the EMS, and the EMS stops DC / DC1 and DC / DC2 when receiving the fault information;

[0032] In an emergency, an emergency stop signal can be sent to the charging control system through S+ and S-, the charging converter and the high-voltage shore power connection distribution board switch are opened, and the charging system is urgently stopped;

[0033] The control operation process of the device includes confirming the correct connection of the connection cable before charging, the AC board in the winch cabin supplying power to the winch container through the power connection box of the ship, and sending an emergency stop signal to the charging control system through S+ and S- in an emergency to achieve the emergency stop of the charging system.

[0034] In summary, the present application includes the following beneficial technical effects:

[0035] The use of the high-voltage mobile charging device can effectively reduce the construction and operation cost of new energy electric ships, promote the growth of green ship power, and promote the technical progress and application expansion of the new energy electric ship equipment manufacturing industry. Through connection with the high-voltage shore power box of the wharf, the device realizes efficient and convenient ship charging, reduces the dependence of ships on fossil fuels, significantly improves the environmental performance of ships, and injects new vitality into the industry.

[0036] The high-voltage mobile charging device adopts a 20-foot container form, with a winch system inside, capable of outputting two-way direct current through the power connection box, connected to two DCDC converters of the ship, and the voltage of the ship's DC bus is stably controlled at 1000VDC. The device not only has high-efficiency charging capacity, but also precisely controls the working mode of the DCDC converter to achieve precise charging of the battery pack. Compared with the traditional direct current charging method, the device significantly improves the charging capacity and efficiency, avoids long waiting and tedious multi-cable operation, and greatly optimizes the user experience.

[0037] In addition, the high-voltage mobile charging device directly docks on the ship, avoiding the large amount of lifting operations required in the traditional box-type power exchange mode, significantly reducing the dependence on wharf crane equipment, reducing operation time and cost. At the same time, the device does not need to occupy the daily use space of the ship or affect its carrying capacity, nor does it need to install additional fixed charging equipment on the ship, thereby reducing the construction cost and maintenance complexity of the ship, providing a solid guarantee for the widespread application and promotion of new energy electric ships. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 A mobile charging device and operation method system schematic diagram of the present application;

[0039] Figure 2 A winch container schematic diagram of the mobile charging device and operation method of the present application;

[0040] Figure 3 A charging container schematic diagram of the mobile charging device and operation method of the present application.

[0041] Reference signs: 1, winch container; 2, electrical operation panel box; 3, high-voltage socket; 4, high-voltage cable winch; 5, high-voltage shore power connection distribution board; 6, UPS; 7, high-voltage cabinet maintenance trolley; 8, charging container; 9, isolation step-down transformer; 10, charging converter; 11, air conditioner; 12, control cabinet; 13, DC socket. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0043] The present application discloses a mobile charging device, and a system schematic diagram thereof is shown in Figure 1 The entire high-voltage mobile charging device is composed of two containers, namely a winch container 1 and a charging container 8, and the internal layouts thereof are shown in Figure 2 and Figure 3 The two containers work cooperatively to achieve efficient charging of an electric ship.

[0044] The winch container 1 has compact internal structure and various functions, and contains an electrical operation panel box 2, a high-voltage cabinet maintenance trolley 7, a high-voltage shore power connection distribution board 5, an uninterruptible power supply (UPS 6), a high-voltage cable winch 4, a high-voltage socket 3, and a cable management system. The high-voltage cable winch 4 is equipped with a cable management system, which adopts a 6kV single-cable design and uses a ship-shore composite cable. The cable management system has an automatic tension control function, can automatically wind and unwind the cable according to the cable tension, and has a last turn alarm and emergency stop function. When the ship docks, the cable is unwound from the winch and connected to the 6kV high-voltage shore power box of the wharf to provide power support for the ship. The high-voltage shore power connection distribution board 5 is responsible for high-voltage protection and has equal potential detection, emergency stop, overcurrent, overload, overvoltage and other protection functions to ensure the safe operation of the equipment. The equal potential detection is realized by the configured equal potential detector, and the overcurrent, overload, overvoltage and other protection functions are realized by the configured comprehensive protection device. The UPS 6 provides control power supply for the high-voltage shore power connection distribution board 5 to ensure the continuous operation capability of the key components. The high-voltage cabinet maintenance trolley 7 is used for the extraction maintenance of the circuit breaker of the high-voltage shore power connection distribution board 5, facilitating the maintenance and repair of the equipment. The winch container 1 is also provided with an alternating current shore power socket matched with the plug of the ship power connection box, and the winch container 1 is powered by the power connection box to meet the power demand of internal lighting, high-voltage cable winch 4 control, etc.

[0045] The charging container 8 is the core unit for charging the electric ship, and its internal layout includes key components such as isolation step-down transformer 9, charging converter 10, air conditioner 11, control cabinet 12 and DC socket 13. The isolation step-down transformer 9 is responsible for reducing 6kV high voltage to 400V low voltage to meet the input voltage requirements of the charging converter 10. The charging converter 10 converts AC 400V to DC 600V-1000V output to provide stable DC power for the electric ship. The air conditioner 11 is used to adjust the temperature in the container to ensure that the equipment operates efficiently in a suitable environment. The control cabinet 12 centrally manages the logic control and protection functions of the entire charging process. The DC socket 13 as the final output port is connected with the ship's junction box and remote switching box to deliver DC power to the ship's DC distribution board. Through the DC / DC converter on the ship, the DC power is further converted to power the ship's DC bus and charge the ship's battery pack. The adjustment of charging power is realized by the energy management system (EMS) of the electric ship through the control of the DC / DC current connected with the box-type power supply, ensuring the accuracy and efficiency of the charging process.

[0046] In terms of connection and cooperation of the equipment, the winch container 1 and the charging container 8 are closely connected through cables to realize the transmission of power and control signals. The high-voltage shore power connection distribution board 5 realizes the functions of high-voltage side protection, grounding protection and equipotential bonding protection, etc., to ensure the safe access and distribution of high-voltage power. The charging converter 10 realizes overvoltage, overcurrent, short circuit protection, etc. on the low-voltage side to ensure the safety of the charging process. The capacity of the isolation step-down transformer 9 and the charging converter 10 can be flexibly matched according to the specific project requirements to adapt to the charging needs of different ships.

[0047] The charging container 8 and the energy management system of the ship interact through the Can communication channel. The S+ and S- jacks in the DC socket 13 (preferred model: JLAP35B-0306-S095) serve as communication interfaces and communicate with the energy management system of the ship in real time to ensure the coordination and control of the charging process.

[0048] The control operation process of the present application is as follows:

[0049] 1) Before charging, confirm that the connection cable between the charging container 8 and the winch container 1 is correctly connected;

[0050] 2) The AC board in the winch cabin is powered by the ship's power connection box to the winch container 1;

[0051] 3) The winch cable is placed on the wharf through the remote control or winch control screen in the winch control box;

[0052] 4) Insert the winch cable plug into the wharf shore power box;

[0053] 5) After detecting that the safety circuit is normal, the port is closed, and 6kV is sent to the high-voltage cabinet;

[0054] 6) After receiving the "charge standby" instruction from the ship energy management system (hereinafter referred to as EMS), the high-voltage cabinet is closed, and the charging converter 10 is started;

[0055] 7) After the charging converter 10 is started, the "ready" state is fed back to the EMS;

[0056] 8) After the EMS receives the "ready" state, it sends a "start" instruction to the charging control system of the charging container 8;

[0057] 9) After the charging control system receives the "start instruction", the charging converter 10 outputs the switch to close, sends the DC power to the remote switching cabinet of the ship, and sends the "start complete" instruction to the EMS;

[0058] 10) After the EMS receives the "start complete" feedback, it controls the remote switching cabinet to pre-charge DC / DC1 and DC / DC2. After pre-charging is completed, DC / DC1 and DC / DC2 are closed, DC / DC1 and DC / DC2 are started, connected to the DC distribution board of the ship, and the charging machine stabilizes the DC output power voltage at 1000V;

[0059] 11) EMS controls DC / DC3 to DC / DC8 connected to the battery pack to work and charges the box-type power supply. The size of the charging current is realized by EMS controlling DC / DC, and the switching of the box-type power supply charging is realized by EMS controlling the remote switching cabinet.

[0060] 12) When stopping, first stop DC / DC3 to DC / DC8, then stop DC / DC1 and DC / DC2, then send a stop instruction to the charging control system, stop the charging converter 10, open the output switch, and send a stop feedback to the EMS.

[0061] 13) During the charging process, when the charging system fails, send a fault information to the EMS, and the EMS stops DC / DC1 and DC / DC2 when receiving the fault information.

[0062] 14) In case of emergency, an emergency stop signal can be sent to the charging control system through S+ and S-, the charging converter 10 and the high-voltage shore power connection distribution board 5 switch are opened, and the charging system is stopped urgently.

[0063] The high-voltage mobile charging device is provided with an emergency stop switch at the cable management system, the high-voltage shore power connection distribution board 5, the charging converter 10 and the DC socket 13 distribution board, and the shore power can be cut off and the charging can be stopped at the above positions in an emergency. The mobile charging device of the embodiment of the application realizes efficient and safe charging of the electric ship through the cooperation of the winch container 1 and the charging container 8. The device has reasonable structure, complete functions, simple operation, wide application prospect and market value.

[0064] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for the purpose of limiting the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A mobile charging device, characterized by, The application relates to a container (1) and a charging container (8) fixedly arranged on a ship and connected, wherein the container (1) is internally provided with a high-voltage cable winch (4) for connecting high-voltage shore power and a cable management system for automatically winding and unwinding the cable, the cable management system adopts a 6kV single cable and can automatically wind and unwind the cable according to the cable tension; the charging container (8) is internally provided with an isolation and voltage reduction transformer (9) and a charging converter (10) for converting high-voltage power into direct-current power to charge a battery of an electric ship, the charging container (8) and an energy management system (EMS) of the ship exchange data, the isolation and voltage reduction transformer (9) reduces the 6kV high voltage to 400V low voltage to meet the input voltage requirement of the charging converter (10), and the charging converter (10) converts the 400V alternating current into 600V-1000V direct current output to provide stable direct-current power for the electric ship.

2. The mobile charging device of claim 1, wherein, The cable management system uses a ship-shore composite cable and has last turn alarm and emergency stop functions.

3. The mobile charging device of claim 2, wherein, The charging container (8) and the energy management system of the ship exchange data through a Can communication channel, and S+ and S- jacks in a charging direct-current socket (13) are used as communication interfaces to realize real-time communication with the energy management system of the ship.

4. The mobile charging device of claim 3, wherein, The high-voltage shore power connection distribution board (5) has equipotential detection, emergency stop, overcurrent, overload and overvoltage protection functions, wherein the equipotential detection is realized by an equipotential detector, and the overcurrent, overload and overvoltage protection functions are realized by a comprehensive protection device.

5. The mobile charging device of claim 4, wherein, The container (1) is provided with a UPS (6) for providing control power supply for the high-voltage shore power connection distribution board (5) to guarantee the continuous operation of key components.

6. The mobile charging device of claim 5, wherein, A high-voltage cabinet maintenance trolley (7) is used for extracting and maintaining breakers of the high-voltage shore power connection distribution board (5).

7. The method of claim 6, wherein, The application comprises the following steps: Before charging, it is confirmed that the connecting cable between the charging container (8) and the container (1) is correctly connected; An alternating-current board supplies power to the container (1) through a power connection box of the ship; The container cable is placed on a wharf through a remote controller or a container control screen; The container cable plug is inserted into a wharf power supply box; After detecting that the safety loop is normal, the wharf is closed, and 6kV is sent to the high-voltage cabinet; After receiving a charging standby instruction of the energy management system (EMS) of the ship, the high-voltage cabinet is closed, and the charging converter (10) is started; After the charging converter (10) is started, a ready state is fed back to the EMS; After receiving the ready state, the EMS sends a starting instruction to a charging control system of the charging container (8); After receiving the starting instruction, the charging converter (10) outputs a switch to close, sends direct-current power to a remote switching cabinet of the ship, and sends a starting completion instruction to the EMS; After receiving the starting completion feedback, the EMS controls the remote switching cabinet to pre-charge DC / DC1 and DC / DC2, closes DC / DC1 and DC / DC2 after pre-charging is completed, starts DC / DC1 and DC / DC2, connects to a direct-current distribution board of the ship, and stabilizes the direct-current output power voltage at 1000V by a charging machine. The EMS controls the DC / DC3 to DC / DC8 connected with the battery pack to work, to charge the box-type power supply, wherein the size of the charging current is realized by the EMS controlling the DC / DC, and the switching of the charging of the box-type power supply is realized by the EMS controlling the remote switching cabinet; When stopping, the DC / DC3 to DC / DC8 are stopped first, then the DC / DC1 and DC / DC2 are stopped, then a stop instruction is sent to the charging control system, the charging converter (10) is stopped, the output switch is opened, and a stop feedback is sent to the EMS; During the charging process, when a fault occurs in the charging system, a fault information is sent to the EMS, the EMS stops the DC / DC1 and DC / DC2 upon receiving the fault information; In an emergency, an emergency stop signal can be sent to the charging control system through S+ and S-, the charging converter (10) and the high-voltage shore power connection distribution board (5) switch are opened, and the charging system is stopped urgently. The control operation process of the device includes confirming that the connection cable is correctly connected before charging, the AC board in the winch cabin is powered by the power connection box of the ship to supply power to the winch container (1), and in an emergency, an emergency stop signal can be sent to the charging control system through S+ and S- to stop the charging system urgently.

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