An all-electric marine vessel automation system and method of integration thereof

Abstract

The application belongs to the technical field of electric ships, and relates to a pure electric ship automation system and an integration method thereof. The system optimizes the network communication protocol of the whole-ship energy management system and the battery management system at the application layer, realizes the monitoring and display of the big data of the battery management system by the network monitoring system under the condition that the independent host of the network monitoring system is cancelled, and uses the energy management system to act as the host of the network monitoring system, integrates the network monitoring system and the existing energy management system, greatly reduces the hardware and wiring of the network monitoring system, enhances the reliability of the network monitoring system, reduces the cost of the electric ship, and is favorable to the promotion and application of the electric ship.

Description

Technical Field

[0001] This invention belongs to the field of electric ship technology and relates to a pure electric ship automation system and its integration method. Background Technology

[0002] Battery-powered ships (hereinafter referred to as electric ships) have the advantages of being green and environmentally friendly, with low noise and low vibration. The battery energy of a single large or medium-sized electric ship can reach hundreds of kilowatt-hours to several megawatt-hours, equivalent to the battery energy of dozens to hundreds of electric vehicles. The emergence of electric ships is of great significance to improving the coastal environment. However, the widespread application of electric ships is somewhat affected by the limitations of their range, fast charging, power system, and automation system costs.

[0003] Electric ships are highly electrified and intelligent, and the various devices mainly interact with each other through network communication, which makes it possible to integrate the ship's energy management system with the ship's network monitoring system (or engine room monitoring and alarm system).

[0004] The existing shipboard energy management system and network monitoring system are two independent systems. A separate network monitoring system host is located in the engine room to collect and receive relevant data from various equipment and piping systems. However, this independent network monitoring system occupies engine room space, increasing the cost of the ship's automation systems. Furthermore, the large number of devices and wiring increases the overall failure rate and the intensity of equipment maintenance. In addition, while the existing network monitoring system interface can display the temperature and voltage of each battery cell in a paginated manner, high-energy electric ships have thousands or even tens of thousands of battery cells. The numerous and complex human-machine interfaces for cell temperature and voltage within the network monitoring system make data browsing and searching difficult. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a pure electric ship automation system and its integration method, which makes the topology of the whole ship system simpler and thus reduces the implementation cost of the automation system.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] On one hand, the present invention provides an integration method for an automated system of a pure electric ship, which transmits and integrates the cell temperature and cell voltage data in the battery management system into the energy management system, integrates the network monitoring system with the energy management system, and eliminates the host and serial port server of the network monitoring system. The central control console touch screen and engine room touch screen of the network monitoring system are respectively connected to the energy management system; the energy management system is also connected to the battery management system and the propulsion control system respectively.

[0008] Furthermore, the battery management system stores the cell data in the battery pack in retention registers with fixed numbers, so as to facilitate the energy management system to write and read the data of the battery management system as a whole.

[0009] Furthermore, the battery pack is formed by multiple battery clusters connected in parallel, each battery cluster is formed by multiple battery packs connected in series, each battery pack is formed by multiple battery modules connected in parallel, and each battery module is formed by multiple cells connected in series and / or in parallel.

[0010] Furthermore, operators can query cell data for different battery packs through the central control console touchscreen and the nacelle touchscreen, and the central control console touchscreen and the nacelle touchscreen are respectively set with cell data request value interfaces corresponding to each battery pack.

[0011] Furthermore, the energy management system determines whether a touchscreen is querying battery data based on the size of the battery data request value sent by each touchscreen; if so, it further determines which touchscreen is querying battery data.

[0012] Furthermore, the above judgment process executes the following loop:

[0013] Step 1: If the cell data request value X sent by each touch screen is less than 1000, then no touch screen queries the cell data; if the cell data request value 1000 < X ​​< 2000 sent by each touch screen, then the cabin touch screen queries the cell data; if the cell data request value X sent by each touch screen is greater than 2000, then the central control console touch screen queries the cell data.

[0014] Step 2: When it is determined that the cabin touch screen or the central control console touch screen is querying battery cell data, the energy management system calculates the corresponding battery pack number and performs a remainder calculation on the battery cell data request value sent by the corresponding touch screen.

[0015] Step 3: Based on the remainder calculation result, further calculate the register address of the cell data in the battery management system, query the cell data of the corresponding battery pack in the battery management system based on the register address, and then return to Step 1.

[0016] On the other hand, the present invention also provides a pure electric ship automation system, which is formed by integrating the above-described integration methods in part or in part. The pure electric ship automation system includes a whole ship system integrating an energy management system and a network monitoring system. The central control console touch screen and engine room touch screen of the network monitoring system are respectively connected to the energy management system. The energy management system is respectively connected to the battery management system and the propulsion control system. The battery management system is also connected to a battery management system touch screen, and the propulsion control system is also connected to a propulsion control system touch screen.

[0017] Furthermore, the battery management system includes at least a first battery management system and a second battery management system, and the communication between the energy management system and the first battery management system and the second battery management system is asynchronous.

[0018] Furthermore, the energy management system communicates with the first battery management system using Modbus TCP communication for a specified time before initiating communication with the second battery management system.

[0019] Furthermore, the energy management system uses register numbers to request cell data within the battery management system in a time-sharing and packet-splitting manner; the packet-splitting transmission of cell data between the energy management system and the battery management system uses Modbus TCP or Modbus RTU communication methods.

[0020] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0021] This invention optimizes the network communication protocol between the ship's energy management system and battery management system at the application layer. By eliminating the need for a separate host for the network monitoring system, it enables the network monitoring system to monitor and display large amounts of data from the battery management system. Utilizing the energy management system as the host for the network monitoring system integrates it with the existing energy management system, significantly reducing the hardware and wiring requirements of the network monitoring system, enhancing its reliability, and lowering the cost of the electric boat, thus facilitating its promotion and application.

[0022] Furthermore, the communication between the ship's energy management system and battery management system adopts a time-sharing asynchronous startup method, initiating communication with two or more battery management systems to reduce network data congestion and improve data transmission efficiency. The touchscreen interface of the network monitoring system uses symbolic I / O fields with input mode and a text list of multiple visible entries to query information for all cells on a single interface, greatly simplifying the touchscreen interface structure, saving touchscreen memory resources, and improving data query and display efficiency. Attached Figure Description

[0023] The accompanying drawings are incorporated in and form part of this specification, and together with the description serve to explain the principles of the invention.

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1The flowchart of the energy management system provided by the present invention is as follows: it determines whether a touchscreen is querying battery data based on the size of the battery data request value sent by each touchscreen, and determines which touchscreen is querying battery data.

[0026] Figure 2 This invention provides a network topology diagram of a pure electric ship automation system.

[0027] Figure 3 This is a diagram of the battery cell information query interface on the touchscreen of the network monitoring system provided by the present invention. Detailed Implementation

[0028] Exemplary embodiments will now be described in detail. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples consistent with some aspects of the invention as detailed in the appended claims.

[0029] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] Example 1

[0031] This embodiment provides an integration method for an automated system of a pure electric ship. The method transmits and integrates the cell temperature and cell voltage data from the battery management system into the energy management system. The network monitoring system is integrated with the energy management system, eliminating the network monitoring system host and its serial port server. The control console touch screen and engine room touch screen of the network monitoring system are connected to the energy management system. The energy management system is also connected to the battery management system and the propulsion control system.

[0032] Furthermore, the battery management system stores the cell data in the battery pack in retention registers with fixed numbers, so as to facilitate the energy management system to write and read the data of the battery management system as a whole.

[0033] Furthermore, the battery pack is formed by multiple battery clusters connected in parallel, each battery cluster is formed by multiple battery packs connected in series, each battery pack is formed by multiple battery modules connected in parallel, and each battery module is formed by multiple cells connected in series and / or in parallel.

[0034] Furthermore, operators can query cell data for different battery packs through the central control console touchscreen and the nacelle touchscreen, and the central control console touchscreen and the nacelle touchscreen are respectively set with cell data request value interfaces corresponding to each battery pack.

[0035] Furthermore, the energy management system determines whether a touchscreen is querying battery data based on the size of the battery data request value sent by each touchscreen; if so, it further determines which touchscreen is querying battery data.

[0036] Furthermore, the above judgment process executes the following loop:

[0037] Step 1: If the cell data request value X sent by each touch screen is less than 1000, then no touch screen queries the cell data; if the cell data request value 1000 < X ​​< 2000 sent by each touch screen, then the cabin touch screen queries the cell data; if the cell data request value X sent by each touch screen is greater than 2000, then the central control console touch screen queries the cell data.

[0038] Step 2: When it is determined that the cabin touch screen or the central control console touch screen is querying battery cell data, the energy management system calculates the corresponding battery pack number N and performs a remainder calculation on the battery cell data request value sent by the corresponding touch screen.

[0039] Step 3: Based on the remainder calculation result, further calculate the register address (N×48+52) of the cell data in the battery management system, query the cell data of the corresponding battery pack in the battery management system based on the register address, and then return to step 1.

[0040] This integration method directly transmits and integrates cell temperature and voltage data from the battery management system into the ship's energy management system. It integrates the network monitoring system with the energy management system, eliminating the network monitoring system host and its serial port server, and retaining only the network monitoring system touch screens (including the central control console touch screen and the engine room touch screen). This makes the ship's control system topology simpler and reduces the production cost of the automation system.

[0041] Meanwhile, since the battery management system stores a large amount of cell temperature and voltage parameters, transmitting these data to the ship's overall energy management system all at once would lengthen the transmission cycle of other important commands such as charging, discharging, and protection, degrade the real-time performance of the ship's network, and prevent real-time start / stop control of battery system charging and discharging, as well as real-time fault protection. Therefore, a query-based data transmission method is adopted to achieve packet-based (small data) transmission of cell parameters between the ship's overall energy management system and the battery management system.

[0042] Furthermore, for ship electric propulsion systems with two or more independent battery systems (or battery clusters, battery domains, battery stacks, etc.), the ship's energy management system adopts an asynchronous start-up method to initiate communication with the two or more battery management systems, reducing the peak data of the ship's network and improving data transmission efficiency. Additionally, a simplified touchscreen interface is designed, allowing for quick querying of all cell data on a single screen via drop-down lists, significantly reducing the number of touchscreen interfaces, saving touchscreen memory resources, and facilitating the querying of parameters for each cell.

[0043] Example 2

[0044] The existing network topology of electric ships typically includes a dedicated host and serial server for network monitoring systems. These systems receive data from each network node and transmit the data via the network to touchscreens in the engine room, control console, and lounge for network monitoring of the entire ship's data.

[0045] Based on the embodiments, this embodiment also provides a fully electric ship automation system that applies the above-described integration method, such as... Figure 2 As shown, electric boats no longer use diesel engines or diesel generator sets as the power source for the entire vessel. The hull no longer needs to be equipped with corresponding fuel, lubricating oil, cooling, air intake / exhaust, and filtration pipelines. The data from the electric boat's network monitoring system is transformed from pipeline data to network data from the power battery system, electronic control frequency converter system, propulsion motor, etc., eliminating the need for a network monitoring system host to collect hard-wired signals from the pipelines. The network monitoring system host and its serial port server are directly eliminated, and the energy management system and network monitoring system are integrated into one unit. Only the large data of the battery cells in the battery management system needs to be sent to the overall energy management system. The energy management system then sends other data from the battery management system, as well as relevant data from the propulsion system and power distribution system, to the network monitoring system touchscreen.

[0046] The power battery module is constructed using standard 150Ah capacity, voltage range of 2.9–3.6V (rated 3.2V), and energy value of 0.48kWh cells. Specifically, the cells are connected in series (6 cells) or in parallel (2 cells) to form a battery module, which has a 6S2P structure. Two battery modules are connected in parallel to form a 12S2P battery pack, 16 battery packs are connected in series to form a 192S2P battery cluster, two battery clusters are connected in parallel to form a 192S2P battery group, and two battery groups are connected in parallel to form the ship's 192S4P power battery system. For safety reasons, the two battery groups are located in two separate engine rooms and equipped with two independent battery management systems to control and manage the two battery groups. A single power battery pack contains a total of 768 cells, which means a total of 768 cells' voltage information and 768 cells' temperature information. Each piece of information is calculated to be 2 bytes in size, and a single transmission requires 3072 bytes. Using the conventional transmission rate of 9600 bits / s to transmit 3072 bytes of data in one direction, it will take at least 2.56 seconds, which will result in poor real-time communication between the energy management system and the battery management system.

[0047] To achieve packet-based transmission of large amounts of battery cell data between the ship's energy management system and battery management systems (first and second battery management systems), both systems can employ polling communication methods such as Modbus TCP or Modbus RTU. The battery management system stores cell data in retentive registers with fixed numbers. The ship's energy management system uses these register numbers to request data from the battery management system in a time-division, packet-based manner. It should be noted that, to improve query and transmission efficiency, the battery management system's cell data is stored in consecutively numbered registers to facilitate overall writing and reading of data from the battery management system by the ship's energy management system. Specific data register addresses are shown in Table 1 below.

[0048] Table 1 Data Register Addresses

[0049]

[0050] When crew members or maintenance personnel query cell data of different battery packs through the network monitoring system touch screens (engine room touch screen and central control console touch screen), the touch screens send different values ​​to the ship's energy management system to request cell data of different battery packs. The request values ​​of different touch screens for cell data of each battery pack are shown in Table 2 below.

[0051] Table 2. Request values ​​for querying battery pack cell data via touchscreen in the network monitoring system.

[0052]

[0053] The system's energy management system determines whether a touchscreen is querying battery data based on the magnitude of the battery data request values ​​sent by each touchscreen through the network monitoring system, and identifies which touchscreen is querying battery data. The determination process executes the following loop:

[0054] Step 1: If the cell data request value X sent by each touch screen is less than 1000, then no touch screen queries the cell data; if the cell data request value 1000 < X ​​< 2000 sent by each touch screen, then the cabin touch screen queries the cell data; if the cell data request value X sent by each touch screen is greater than 2000, then the central control console touch screen queries the cell data.

[0055] Step 2: When it is determined that the cabin touch screen or the central control console touch screen is querying battery cell data, the energy management system calculates the corresponding battery pack number and performs remainder and fitting calculations on the battery cell data request value sent by the corresponding touch screen (see Table 2).

[0056] Step 3: Based on the remainder calculation result, further calculate the register address of the cell data in the battery management system, query the cell data of the corresponding battery pack in the battery management system based on the register address, and then return to Step 1.

[0057] To reduce network transmission peaks, the energy management system uses Modbus TCP communication to communicate with the first battery management system for a short delay (e.g., 64ms) before initiating communication with the second battery management system. The communication between the ship's energy management system and the two battery management systems is asynchronous, which can effectively achieve "peak-shifting" transmission of network data, reduce network data congestion, and improve data transmission efficiency.

[0058] To simplify the interface structure of each touchscreen in the network monitoring system, save touchscreen memory resources, shorten touchscreen response time, and improve data query efficiency, the touchscreen interface uses symbolic I / O fields with input mode and a text list of multiple visible entries to enable querying of all cell information within a single interface. The touchscreen interface of the network monitoring system for querying and displaying cell data for each battery pack is as follows: Figure 3 As shown, the cell query for "Group 2 Cluster 2 Battery Pack" is in the expanded state of the drop-down list.

[0059] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention.

[0060] It should be understood that the present invention is not limited to the content already described above, and various modifications and changes can be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. An integration method for a pure electric ship automation system, characterized in that, The battery management system transmits and integrates cell temperature and voltage data into the energy management system. The network monitoring system is integrated with the energy management system, eliminating the network monitoring system host and its serial port server. The central control console touchscreen and cabin touchscreen of the network monitoring system are connected to the energy management system. The energy management system is also connected to the battery management system and the propulsion control system.

2. The integration method of the pure electric ship automation system according to claim 1, characterized in that, The battery management system stores the cell data in the battery pack in retention registers with fixed numbers, so that the energy management system can write and read the data of the battery management system as a whole.

3. The integration method of the pure electric ship automation system according to claim 2, characterized in that, The battery pack is formed by multiple battery clusters connected in parallel, each battery cluster is formed by multiple battery packs connected in series, each battery pack is formed by multiple battery modules connected in parallel, and each battery module is formed by multiple cells connected in series and / or in parallel.

4. The integration method of the pure electric ship automation system according to claim 3, characterized in that, Operators can query cell data for different battery packs through the central control console touch screen and the engine compartment touch screen. The central control console touch screen and the engine compartment touch screen are respectively set with cell data request value interfaces corresponding to each battery pack.

5. The integration method of the pure electric ship automation system according to claim 4, characterized in that, The energy management system determines whether a touchscreen is querying battery data based on the size of the battery data request value sent by each touchscreen; if so, it further determines which touchscreen is querying battery data.

6. The integration method of the pure electric ship automation system according to claim 5, characterized in that, The judgment process executes the following loop: Step 1: If the cell data request value X sent by each touch screen is less than 1000, then no touch screen queries the cell data; if the cell data request value 1000 < X ​​< 2000 sent by each touch screen, then the cabin touch screen queries the cell data; if the cell data request value X sent by each touch screen is greater than 2000, then the central control console touch screen queries the cell data. Step 2: When it is determined that the cabin touch screen or the central control console touch screen is querying battery cell data, the energy management system calculates the corresponding battery pack number and performs a remainder calculation on the battery cell data request value sent by the corresponding touch screen. Step 3: Based on the remainder calculation result, further calculate the register address of the cell data in the battery management system, query the cell data of the corresponding battery pack in the battery management system based on the register address, and then return to Step 1.

7. A fully electric ship automation system, characterized in that, The pure electric ship automation system is formed by integrating the integration method described in any one of claims 1 to 6. The system includes a whole ship system integrating an energy management system and a network monitoring system. The central control console touch screen and engine room touch screen of the network monitoring system are respectively connected to the energy management system. The energy management system is respectively connected to the battery management system and the propulsion control system. The battery management system is also connected to a battery management system touch screen, and the propulsion control system is also connected to a propulsion control system touch screen.

8. The pure electric ship automation system according to claim 7, characterized in that, The battery management system includes at least a first battery management system and a second battery management system, and the communication between the energy management system and the first battery management system and the second battery management system is asynchronous.

9. The pure electric ship automation system according to claim 8, characterized in that, The energy management system communicates with the first battery management system using Modbus TCP communication for a specified time before initiating communication with the second battery management system.

10. The pure electric ship automation system according to claim 7, characterized in that, The energy management system uses register numbers to request time-sharing and packet-sharing data from the battery management system. The packet-sharing transmission of data between the energy management system and the battery management system uses Modbus TCP or Modbus RTU communication methods.

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