Marine container type mobile power supply control and monitoring system

Abstract

The utility model provides a container type mobile power supply control and monitoring system for a ship. The container type mobile power supply control and monitoring system comprises a PLC-based central control unit; the communication management unit is connected with the central control unit through a switch, and the communication management unit is respectively connected with the ship management unit, the ship network, the liquid cooling unit, the battery management unit and the DC / AC inverter so as to receive and forward the data of the ship management unit, the ship network, the liquid cooling unit, the battery management unit and the DC / AC inverter; the fuse state detection unit, the insulation state detection unit, the battery switch state detection unit, the DC / AC emergency stop unit, the alarm unit and the relay are connected with the central control unit; and the human-computer interface is connected with the switch to realize human-computer interaction. According to the utility model, through centralized control of the PLC, the system realizes efficient automatic management, and human intervention is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of marine power supply, specifically, relate to a marine container type mobile power control and monitoring system. BACKGROUND

[0002] With the development of green energy technology, electric ships are widely used in the field of shipping. As the power source of pure electric ships, the design and control management of container mobile power system (CMPS) is crucial. The existing different marine container mobile power supply management systems have different requirements for real-time monitoring, automatic control and remote operation, and need to be designed specifically for the monitoring and control system to improve the efficiency and safety of the system.

[0003] Traditional power management systems use manual control and simple monitoring methods, which cannot meet the complex ship battery management requirements. In order to improve the automation level of the power management system, the automatic control technology based on programmable logic controller (PLC) is gradually applied to the field of power management, which has the advantages of strong flexibility, fast response speed and high system safety. SUMMARY

[0004] In order to solve the above technical problems, the utility model provides a marine container type mobile power control and monitoring system, which comprises: a central control unit based on PLC; a communication management unit connected to the central control unit via a switch for mutual communication, the communication management unit is also connected to the ship management unit, the ship network, the liquid cooling unit, the battery management unit and the DC / AC inverter to receive and forward the data of the ship management unit, the ship network, the liquid cooling unit, the battery management unit and the DC / AC inverter; a fuse state detection unit connected to the central control unit to detect whether the current in the DC circuit of the system is too large; an insulation state detection unit connected to the central control unit to detect the insulation state of the circuit in the system; a battery switch state detection unit connected to the central control unit to detect whether the battery pack of the marine container type mobile power supply is in the open or closed state; a DC / AC emergency stop unit connected to the central control unit to stop the system running when detecting that the system has an abnormality; an alarm unit connected to the central control unit to trigger an alarm when detecting that the system has an abnormality; a relay connected to the central control unit, the signal of the relay is transmitted to the battery management unit via the central control unit; a human-computer interface connected to the switch to realize human-computer interaction.

[0005] According to this invention, the system achieves efficient automated management through centralized PLC control, reducing human intervention. The system integrates multiple safety protection mechanisms, enabling emergency shutdown upon detecting anomalies, thus enhancing system safety. Furthermore, it supports remote monitoring and operation, allowing operators to handle faults and perform remote maintenance in real time, greatly improving system flexibility. The high reliability and anti-interference capabilities of the PLC ensure stable system operation in complex environments, optimize battery charging and discharging management, improve energy utilization, and reduce operating and maintenance costs. Therefore, this system demonstrates high practicality and safety in ship power management and has broad application prospects.

[0006] Preferably, the central control unit, battery management unit, and DC / AC inverter are located inside the combiner cabinet of the marine containerized mobile power supply, and the human-machine interface is the display screen of the combiner cabinet.

[0007] Preferably, the display screen is a touch screen.

[0008] Preferably, the communication management unit is connected to the switch, the ship network, the ship management unit, and the battery management unit via an Ethernet interface.

[0009] Preferably, the communication management unit is connected to the DC / AC inverter and the liquid-cooled unit via an RS485 interface to enable bidirectional communication between the central control unit and the DC / AC inverter and the liquid-cooled unit.

[0010] Preferably, the battery management unit transmits data on the voltage, temperature, and charge status of the battery pack to the central control unit via the data management unit, and the central control unit automatically adjusts the charging and discharging status of the battery pack or starts the liquid cooling unit based on the data from the battery management unit.

[0011] Preferably, a temperature sensor for collecting temperature data during charging or discharging of the battery pack is installed in each charging and discharging interface of the battery pack, and the battery management unit receives the temperature data from the temperature sensor and transmits it to the central control unit.

[0012] Preferably, the communication management unit is also connected to the antenna via a router to transmit the ship's data to a cloud server.

[0013] Preferably, the antenna is the container wall antenna of the marine containerized mobile power supply, and the antenna is connected to the router via its own cable. The router is connected to the communication management unit via an Ethernet interface.

[0014] Preferably, it further includes an emergency power failure detection unit connected to the central control unit to detect whether the DC / AC emergency stop unit is in normal operating condition. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a marine containerized mobile power supply control and monitoring system according to one embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of the communication network of a marine containerized mobile power supply control and monitoring system according to one embodiment of the present invention. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and the following embodiments. It should be understood that the drawings and the following embodiments are for illustrative purposes only and are not intended to limit the present invention. Any non-essential improvements and adjustments made by those skilled in the art based on the above description of the present invention are within the protection scope of the present invention. The specific process parameters, etc., in the following examples are merely examples within a suitable range; that is, those skilled in the art can make appropriate selections within the appropriate range based on the description herein, and are not intended to be limited to the specific values ​​in the examples below.

[0018] This invention provides a marine containerized mobile power supply control and monitoring system, aiming to improve the power management efficiency and safety of pure electric ships. A containerized mobile power supply refers to a battery power system that uses a shipping container as a battery mounting platform. A typical containerized mobile power supply usually includes a battery compartment (i.e., battery housing), a combiner cabinet, fire-fighting equipment, monitoring devices, and ventilation equipment.

[0019] Specifically, Figure 1 This is a schematic diagram of a marine containerized mobile power supply control and monitoring system according to one embodiment of this utility model. Figure 1 As shown, the marine containerized mobile power supply control and monitoring system of this embodiment may include a PLC-based central control unit (i.e., Figure 1 The PLC shown is a communication management unit that communicates with the central control unit via a switch.

[0020] For example Figure 1 As shown, the communication management unit is also connected to the ship management unit (i.e., the ship's PWS system), the ship network (i.e., the ship's WEB), the liquid cooling unit, the battery management unit (i.e., the BMS system), and the DC / AC inverter to receive and forward data from the ship management unit, the ship network, the liquid cooling unit, the battery management unit, and the DC / AC inverter. Figure 1The diagram shows two BMS systems, BMS1 and BMS2. However, this invention is not limited to these systems and can be configured according to the actual number of battery packs. The aforementioned communication management unit serves as the system's data hub and can specifically be a communication management unit. In a concrete example, an iHT-S818-10 communication management unit could be used.

[0021] Furthermore, this communication management unit can be connected to the switch, ship network, ship management unit, and battery management unit via Ethernet interfaces. This ensures smooth communication between the units and enables centralized control and remote monitoring of the system. For example, it can connect to the high-voltage box of the marine containerized mobile power supply via Ethernet interface and CAN bus (CANH and CANL) to collect and transmit real-time data from the battery management unit and transmit the data to the communication management unit.

[0022] The communication management unit can also be connected to the DC / AC inverter and liquid chiller via an RS485 interface to enable bidirectional communication between the central control unit and the DC / AC inverter and liquid chiller. Through the RS485 interface, the operating status of the DC / AC inverter and the operating data of the liquid chiller can be collected in real time, and control can be performed according to preset logic. During battery charging and discharging, if the battery temperature is too high, the liquid chiller, acting as a cooling system, will be automatically activated; if the battery temperature is too low, the heating system will be automatically activated.

[0023] More specifically, the aforementioned battery management unit can transmit data on the battery pack's voltage, temperature, and charge status to the central control unit via the data management unit. The central control unit then automatically adjusts the battery pack's charging and discharging status or activates the liquid cooling unit based on the data from the battery management unit.

[0024] Furthermore, in this embodiment, temperature sensors can be installed in each charging / discharging interface (e.g., charging socket) of the battery pack to collect different temperature data during battery charging or discharging. The battery management unit receives the temperature data from the temperature sensors and transmits it to the aforementioned central control unit. Alternatively, the battery management unit can also collect the internal temperature of the combiner cabinet using a temperature sensor located inside the combiner cabinet and transmit it to the aforementioned central control unit.

[0025] In addition, such as Figure 1 As shown, the marine containerized mobile power supply control and monitoring system of this embodiment also includes a fuse status detection unit connected to the central control unit to detect whether the current in the DC circuit of the system is too high. This allows for timely alarm in case of fuse failure, ensuring equipment safety at the first opportunity.

[0026] For example Figure 1As shown, the marine containerized mobile power supply control and monitoring system of this embodiment also includes an insulation status detection unit connected to the central control unit to detect the insulation status of the circuits in the system. This is to ensure timely understanding of the circuit insulation status and avoid the risk of leakage.

[0027] For example Figure 1 As shown, the marine containerized mobile power supply control and monitoring system of this embodiment also includes a battery switch status detection unit connected to the central control unit to detect whether the battery pack of the marine containerized mobile power supply is in an open or closed state. This allows for real-time reception of power system switch status signals, enabling understanding of the connection status between the power system and external power supply equipment.

[0028] For example Figure 1 As shown, the marine containerized mobile power supply control and monitoring system of this embodiment also includes a DC / AC emergency stop unit connected to the central control unit to stop system operation when an abnormality is detected, and an alarm unit connected to the central control unit to trigger an alarm when an abnormality is detected. The DC / AC emergency stop unit may include an emergency stop button. Thus, an emergency stop alarm can be triggered when a system fault occurs, promptly notifying maintenance personnel to check for equipment failure. All operating equipment can be manually stopped via the emergency stop button, and power is cut off to prevent equipment damage, thereby protecting the system and personnel safety. The alarm unit may be, for example, a buzzer. When the buzzer sounds an alarm, maintenance personnel arrive to check the fault and then silence it. After troubleshooting, maintenance personnel can manually clear the alarm status via the alarm unit's reset button to ensure normal system operation.

[0029] For example Figure 1 As shown, the marine containerized mobile power supply control and monitoring system of this embodiment also includes a human-machine interface (HMI) connected to a switch to realize human-machine interaction.

[0030] For example Figure 1 As shown, the marine containerized mobile power supply control and monitoring system of this embodiment also includes a relay connected to the central control unit. The signal from this relay is transmitted to the battery management unit via the central control unit, thereby activating the battery management unit. Specifically, this relay can be a control device within the marine containerized mobile power supply, and its operation can be controlled by a button on the human-machine interface. When the operator presses the button, the relay is triggered to send a relay signal to the central control unit, which then activates the battery management unit based on the relay signal.

[0031] In addition, continue to refer to Figure 1In the marine containerized mobile power supply control and monitoring system of this embodiment, the communication management unit can also be connected to an antenna via a router to transmit ship data to a cloud server. Specifically, the antenna can be the container wall antenna of the marine containerized mobile power supply, which is connected to the router via its own cable. The router can be connected to the communication management unit via an Ethernet interface.

[0032] In addition, such as Figure 1 As shown, the marine containerized mobile power supply control and monitoring system of this embodiment also includes an emergency stop power failure detection unit connected to the central control unit to detect whether the DC / AC emergency stop unit is in normal operating condition. This allows for real-time monitoring of whether the emergency stop button is functioning correctly, ensuring timely shutdown in case of equipment failure.

[0033] Furthermore, the marine containerized mobile power supply control and monitoring system of this embodiment can also adopt a modular design. For example, a 16-channel input / output module (such as the SM1223 16DI / 16DQ module, which can be model 6ES7-223-1BL32-0XB0) can be used to monitor and control multiple input and output signals. The PLC uses this module to collect and control various signals such as battery status, liquid cooling unit status, BWS status, DC / AC inverter, and alarm unit. When the system starts, the PLC monitors the above input signals in real time to ensure the stable and safe operation of the system under normal or abnormal conditions. Specifically, the module can be designed as follows.

[0034] Fuse status signal channel: Detects excessive current in the DC circuit of the system. When excessive current is detected, a fuse fault signal is input. Insulation status signal channel: Detects the insulation status of the circuits in the system, specifically the insulation status of the DC and AC circuits. When low insulation is detected in either the DC or AC circuit, a low insulation alarm signal is input. Battery switch status signal channel: Detects whether the battery pack is in the open or closed state, inputting its open / closed status signal. Liquid chiller and DC / AC inverter signal channels: The system is equipped with detection signals for the liquid chiller and DC / AC inverter for real-time monitoring of the operating status of cooling and power equipment. DC / AC inverter status signal monitoring ensures the stability of power transmission within the combiner cabinet. When an abnormality is detected in the DC / AC inverter, the system can promptly switch to backup power.

[0035] For the DC / AC emergency stop and alarm units, fault signal and emergency stop signal channels are used to detect abnormal conditions within the system, such as liquid cooling unit failures, voltage anomalies, short circuits, or overloads, and provide an emergency stop button interface. When a fault signal is detected, the system will immediately trigger an alarm, and all operating equipment can be manually stopped via the emergency stop button to protect the system and personnel safety. Output control and equipment actions are handled through output channels for power switching, alarm unit actions, and other equipment actions. When the PLC determines that control is required based on input signals, it triggers the start or stop of the corresponding equipment through the output channels, achieving automated and intelligent system management. More specifically, the alarm and emergency stop units, including alarm signal interfaces, indicator lights, and emergency stop switches, ensure timely system response in fault or dangerous situations. When the PLC detects an abnormality within the system, such as excessively high temperature or abnormal voltage, it will trigger the alarm unit through the output channels and display the current status via indicator lights. Simultaneously, operators can manually interrupt system operation via the emergency stop switch to ensure safety. In other words, if the emergency stop button is pressed in an emergency, the PLC can quickly and safely stop the system automatically, and at the same time, a signal will be sent to the BMS system, thereby ensuring personnel safety, protecting equipment, and preventing the accident from escalating.

[0036] In addition, this module can also be equipped with a circuit breaker status signal channel to detect whether the circuit breakers in the system are in the open or closed state. It can also be equipped with a power supply status signal channel to detect whether the 24V power supply status is normal. The system can react quickly in the event of a power failure to avoid losses caused by power outages. In other words, the PLC manages and controls the circuit breaker switching status of the power system, allowing operators to remotely control the opening and closing of the circuit breakers. When overcurrent, short circuit, or overload faults are detected in the battery, the PLC can automatically control the circuit breaker to open, and the signal will be hardwired to the BMS system to prevent the fault from escalating and equipment damage.

[0037] Furthermore, monitoring of the Battery Management Unit (BMS) can include two independent BMS monitoring signal channels, each detecting the status of the BMS. The BMS is responsible for detecting parameters such as battery pack voltage, temperature, and state of charge (SOC), and transmitting this data to the PLC. Based on the feedback information from the BMS, the PLC automatically adjusts the battery pack's charging and discharging state or starts the liquid cooling unit to ensure the safe and efficient operation of the battery pack. Preferably, when the system has a startup requirement (such as when the battery needs power or charging), it sends a wake-up signal to the BMS. Upon receiving this signal, the BMS automatically starts the battery management process without manual intervention.

[0038] Preferably, an analog input module with eight analog input channels (such as the SM1231 8AI module) can also be used to collect temperature signals during the battery charging and discharging process. Each channel can receive analog signals to detect the signals from the temperature sensors in the system. When the system starts up, the PLC collects all sensor data through the analog input channels of this module and monitors the battery's operating status in real time.

[0039] For example, for monitoring the charging and discharging status of the battery pack, the system is equipped with different socket interfaces to collect different temperature signals during charging and discharging. During charging, the system acquires temperature data through this analog input module and analyzes abnormal situations in real time to ensure stable charging and discharging. When the system detects a discharging state, the PLC monitors the data of all sockets. For temperature monitoring and protection, a temperature sensor is installed in each charging and discharging interface to collect temperature data through the analog input channel. The PLC monitors the temperature of the charging and discharging interface based on the temperature sensor data. If the temperature exceeds the safety threshold, the PLC will activate an alarm and adjust the charging and discharging status to ensure that the battery pack operates within a safe range. That is, when an abnormal temperature is detected, the PLC will trip the circuit breaker, automatically disconnecting the power system from the external power supply equipment to ensure equipment safety, and simultaneously send a high-temperature signal to the BMS, which will then prohibit charging and discharging to ensure the safe operation of the battery. If the temperature of the combiner cabinet is collected, then when the temperature inside the combiner cabinet is too high, it will indicate that the air conditioner and cooling fan are not turned on, resulting in excessively high temperatures inside the cabinet.

[0040] Furthermore, Figure 2 This is a schematic diagram of the communication network of a marine containerized mobile power supply control and monitoring system according to one embodiment of the present invention.

[0041] like Figure 2 As shown, the aforementioned central control unit, battery management unit, and DC / AC inverter can be housed within the combiner cabinet of a marine containerized mobile power supply, and the aforementioned human-machine interface can be the display screen of the combiner cabinet. Furthermore, the display screen can be a touchscreen.

[0042] like Figure 2 As shown, the aforementioned communication management unit is connected to the PLC in the combiner cabinet via a switch for mutual communication. This communication management unit is also connected to the ship's PWS, ship's WEB, liquid cooling unit, and the battery management units (BMS1, BMS2) and DC / AC inverter located in the combiner cabinet to receive and forward data from these devices. Furthermore, the communication management unit can be connected to an antenna via a router to transmit ship data to a cloud server. The touchscreen on the combiner cabinet serves as a human-machine interface and is connected to the central control unit via a switch for human-machine interaction.

[0043] The communication management unit maintains real-time connectivity with each subunit. Once the ship's electrical system is started, the communication management unit establishes connections with the ship's PMS, ship's web interface, routers, and switches via Ethernet interfaces. The RS485 interface is used to acquire real-time status information from the DC / AC inverters and liquid-cooled units.

[0044] Further, as a specific example, the PLC's DI module collects relay signals, battery switch status signals, buzzer signals, fuse signals, etc., and transmits them to the communication management unit via the Modbus TCP protocol. The communication management unit collects battery data from the battery management units (BMS1, BMS2) via the Modbus TCP protocol, and data from the liquid cooling unit and DC / AC inverter via the Modbus RTU protocol. The communication management unit then connects to the router via the MQTT protocol, and transmits the ship's data to the cloud server via the router's antenna (antenna specifications can be customized). Users can log in via a web interface to view the ship's container data in real time. The communication management unit connects to a switch, transmitting data to the PLC via the Modbus TCP protocol, and the PLC then transmits it to the HMI via the Siemens S7 protocol. The communication management unit connects to the ship's PMS via the Modbus TCP protocol, enabling communication between the battery management units (BMS1, BMS2) and the ship's main system, facilitating real-time monitoring and management of the battery system's charging and discharging. The communication management unit connects to the ship's web interface via Modbus TCP protocol to collect data from the battery management units (BMS1, BMS2), enabling remote monitoring of all battery information from the bridge. The communication management unit connects to the battery management units (BMS1, BMS2) via Modbus TCP protocol, collecting real-time information such as battery voltage, current, and temperature, while simultaneously transmitting relay signals to the battery management units (BMS1, BMS2).

[0045] In addition, the communication management unit and the liquid cooling unit achieve bidirectional communication between the two units via the Modbus RTU protocol. Simultaneously, the communication management unit transmits the collected alarm data from the liquid cooling unit to the battery management units (BMS1, BMS2). When the liquid cooling unit generates an alarm, it triggers a buzzer, and the data is displayed on the touchscreen. DC / AC emergency stop signals and low insulation alarm signals disconnect the power supply to the liquid cooling unit. The liquid cooling unit is connected to the communication management unit. During charging and discharging, when the battery pack temperature exceeds the set value, the PLC automatically starts the liquid cooling unit by monitoring the battery temperature signal; when the battery temperature falls below the set value, the PLC automatically starts the heating system by monitoring the battery temperature signal; when the battery temperature is within the appropriate range, the PLC automatically starts the constant temperature system by monitoring the battery temperature signal. This adjusts the operating parameters of the liquid cooling unit to ensure the battery pack remains at its optimal operating temperature, while also ensuring reasonable operation of the liquid cooling unit and reducing battery consumption.

[0046] The communication management unit and the DC / AC inverter use the Modbus RTU protocol to collect data from the DC / AC inverter and display the data on the touchscreen. DC / AC emergency stop signals and low insulation alarm signals will cause the DC / AC inverter to stop operating.

[0047] Through the coordinated operation of the PLC and communication management unit, the system can automatically adjust the operating status of the battery pack and the liquid cooling unit as the cooling system, achieving efficient and intelligent power management. The system employs Ethernet and RS485 interfaces to ensure stable data transmission between units, improving system reliability and anti-interference capabilities.

[0048] In summary, this utility model's PLC-based containerized mobile power supply control and monitoring system has several advantages. Firstly, through centralized PLC control, the system achieves efficient automated management, reducing human intervention and featuring intelligent temperature management to ensure battery operation within the optimal temperature range, extending battery life and improving safety. The system integrates multiple safety protection mechanisms, enabling emergency shutdown upon detecting anomalies, further enhancing system safety. Furthermore, it supports remote monitoring and operation, allowing operators to handle faults and perform remote maintenance in real time, greatly improving system flexibility. The system adopts a modular design, possessing excellent scalability, and its real-time data acquisition and historical recording functions provide a basis for fault diagnosis and system optimization. The high reliability and anti-interference capabilities of the PLC ensure stable system operation in complex environments, optimize battery charging and discharging management, improve energy utilization, and reduce operating and maintenance costs. Therefore, this system demonstrates high practicality and safety in ship power management and has broad application prospects.

[0049] Without departing from the spirit of the present invention, the present invention may be embodied in various forms. Therefore, the embodiments described herein are for illustration rather than limitation. Since the scope of the present invention is defined by the claims rather than by the description, and all variations falling within the scope defined by the claims, or equivalent to the scope defined by the claims, should be understood to be included in the claims.

Claims

1. A marine containerized mobile power supply control and monitoring system, characterized in that, include: PLC-based central control unit; A communication management unit is connected to the central control unit via a switch to communicate with each other. The communication management unit is also connected to the ship management unit, ship network, liquid cooling unit, battery management unit and DC / AC inverter respectively to receive and forward data from the ship management unit, ship network, liquid cooling unit, battery management unit and DC / AC inverter. A fuse status detection unit connected to the central control unit to detect whether the current in the DC circuit of the system is too high; An insulation status detection unit is connected to the central control unit to detect the insulation status of the circuits in the system. A battery switch status detection unit connected to the central control unit to detect whether the battery pack of the marine containerized mobile power supply is in an open or closed state. A DC / AC emergency stop unit connected to the central control unit to stop system operation when an abnormality is detected in the system; An alarm unit connected to the central control unit to trigger an alarm when an anomaly is detected in the system; A relay connected to the central control unit, the signal of which is transmitted to the battery management unit via the central control unit; A human-machine interface is connected to the switch to enable human-machine interaction. The communication management unit is connected to the switch, the ship network, the ship management unit, and the battery management unit via Ethernet interfaces, respectively. The battery management unit transmits data on the voltage, temperature, and charge status of the battery pack to the central control unit via the data management unit. The central control unit automatically adjusts the charging and discharging status of the battery pack or starts the liquid cooling unit based on the data from the battery management unit.

2. The system according to claim 1, characterized in that, The central control unit, battery management unit, and DC / AC inverter are located in the combiner cabinet of the marine containerized mobile power supply, and the human-machine interface is the display screen of the combiner cabinet.

3. The system according to claim 2, characterized in that, The display screen is a touch screen.

4. The system according to claim 1, characterized in that, The communication management unit is connected to the DC / AC inverter and the liquid-cooled unit via an RS485 interface to enable bidirectional communication between the central control unit and the DC / AC inverter and the liquid-cooled unit.

5. The system according to claim 1, characterized in that, Temperature sensors are installed in each charging and discharging interface of the battery pack to collect temperature data when the battery pack is charging or discharging. The battery management unit receives the temperature data from the temperature sensors and transmits it to the central control unit.

6. The system according to claim 1, characterized in that, The communication management unit is also connected to the antenna via a router to transmit ship data to a cloud server.

7. The system according to claim 6, characterized in that, The antenna is the container wall antenna of the marine containerized mobile power supply. The antenna is connected to the router via its own cable, and the router is connected to the communication management unit via an Ethernet interface.

8. The system according to claim 1, characterized in that, It also includes an emergency power failure detection unit connected to the central control unit to detect whether the DC / AC emergency stop unit is in normal operating condition.

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