Box-type power lithium battery device integration platform for ship application and operation control method of box-type power lithium battery device integration platform

Abstract

The invention discloses a box-type power lithium battery device integration platform applied to a ship and an operation control method of the box-type power lithium battery device integration platform. The integrated platform adopts a longitudinally layered and transversely integrated distributed ship power battery application strategy, develops a ship application box type power lithium battery integrated platform and a ship end device and a management system BMS thereof, and is responsible for power battery safe operation, energy control and information management including battery state monitoring, SOC estimation, SOH analysis, safety protection and information interaction; under the condition that the use requirement of the ship is met, the purpose of prolonging the service life of the battery system is achieved while the operation efficiency and the dynamic response capability of the power system are improved according to the battery state and propulsion state data.

Description

Technical Field

[0001] The present invention belongs to the technical field of ship power battery systems, and in particular relates to a ship application box-type power lithium battery device integrated platform and an operation control method thereof. Technical Background

[0002] The ship power system / device is one of the most important components of the ship and a key element in ensuring the safety and performance of the ship. The fuel power system is one of the most common ship power systems. In order to maximize fuel efficiency and environmental sustainability, hybrid power systems have emerged; with the increasing attention to environmental sustainability, pure battery ship power systems have been developed. The key to the research and application of pure battery power propulsion systems for ships lies in solving the integration and management issues of battery systems, propulsion motors, daily loads, shore power access, etc. in ship power battery systems.

[0003] Patent application CN117254143A discloses a ship battery management system with good compatibility, which adopts a three-level architecture consisting of a master control unit, a main control unit and a slave control unit. The master control unit is connected to the ship energy management system in communication, and the ship energy management system is connected to the ship inverter in communication. Multiple master control units, multiple slave control units and multiple communication methods are redundantly set up to effectively prevent the dangers of battery overcharge, over-discharge, over-temperature, etc. However, the problem is that the specific implementation details are not given, and no specific implementation method is given for how to prevent battery overcharge, over-discharge and over-temperature; Patent application CN117613422A discloses a remote operation and maintenance monitoring device for a ship lithium-ion battery system, which connects a real-time data acquisition and transmission platform to a shore operation and maintenance analysis platform through the Internet, thereby transmitting the battery data collected by the real-time data acquisition platform to the shore operation and maintenance analysis platform in real time, and the shore operation and maintenance analysis platform evaluates the battery status. The invention selects battery cell voltage, voltage difference between battery cells, etc. as health factors for monitoring, and selects parameters in the classic battery models Shepherd, Unnewehr and Nernst models for fitting, and its evaluation accuracy is limited. Summary of the invention

[0004] The technical problem to be solved by the present invention is: to provide an integrated platform for box-type power lithium battery devices for ship applications, to develop a ship-side modular ship pure battery management system BMS, to ensure the safe operation management of the power battery and the real-time control of the battery management system BMS by the ship power management system PMS under abnormal circumstances, and to effectively improve the safety and reliability of the ship lithium battery system.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: an integrated platform for a box-type power lithium battery device for ship application, including a ship-end box-type lithium battery device, a ship power management system PMS and a shore-end monitoring center; the ship-end box-type lithium battery device is used to provide lithium battery power for the ship and manage the operation of the lithium battery; the ship power management system PMS has the ability to monitor and control the power system / equipment of the whole ship, and the ship power management system PMS interacts with the ship-end box-type lithium battery device in a communication manner to ensure the stable operation of the ship-end box-type lithium battery device and the safe return of the ship; the shore-end monitoring center obtains data from the ship power management system PMS in a communication manner to realize ship-shore information interaction and supervision;

[0006] The ship-end box-type lithium battery device includes a lithium battery management system BMS, a lithium battery device, a common DC bus, a bus assembly, a load, a photovoltaic assembly, a shore power socket group and a generator;

[0007] The lithium battery management system BMS includes a master controller, a display screen, a power module, and a battery management module. The power module provides working voltage for the master controller; the battery management module includes a slave control management module, a master control management module, a master control management module, and a database A. The battery management module performs data collection, storage, and calculation of the master controller and the lithium battery device through communication, and executes the instructions of the corresponding processing results respectively;

[0008] The ship power management system PMS and the lithium battery management system BMS use industrial bus communication and data exchange through the communication interface to achieve coordinated operation with the ship-side box-type lithium battery device, distribute power to the ship and manage the energy efficiency of the lithium battery device;

[0009] The ship power management system PMS establishes a status information database for the operation data and monitoring data collected and recorded in the lithium battery management system BMS through the communication interface and management module, and stores it in the management database for the operation management of the ship power system; the shore monitoring center remotely monitors the ship-side box-type lithium battery device and the ship power management system PMS in real time; the data support of the management database and the data center is provided by the lithium battery management system BMS;

[0010] The lithium battery device includes a main controller, a display screen and multiple battery clusters, each battery cluster includes multiple battery packs connected in series, each battery pack includes a slave controller and at least two battery modules, the main controller and the battery pack interact with each other through the slave controller in a communication manner, and adjacent battery packs interact with each other through their respective slave controllers in a communication manner to achieve operation monitoring and management services for the lithium battery pack; the lithium battery management system BMS transmits and processes data with the main controller of the lithium battery device through the communication interface of the main controller, monitors the operating status of the lithium battery device and performs corresponding command processing; the load includes ship propulsion load and daily electricity load.

[0011] As a preferred solution, the shore power socket group and the generator charge the lithium battery through a common DC bus or provide power to the load under emergency conditions.

[0012] As a preferred solution, the shore power socket group includes a DC shore power socket 1, a DC shore power socket 2, and an AC shore power socket.

[0013] As a preferred solution, a bus tie switch is provided on the common DC bus, which is normally closed during normal operation and disconnected during shore power charging; an isolation transformer assembly 1 and an isolation transformer assembly 2 are provided between the AC shore power socket, the generator and the common DC bus. During normal operation, the isolation transformer assembly 1 and the isolation transformer assembly 2 operate simultaneously to supply power to the AC distribution board; when charging at shore, the isolation transformer assembly 1 and the isolation transformer assembly 2 operate simultaneously to reverse charge the lithium battery device through the AC shore power.

[0014] As a preferred solution, the ship-end box-type lithium battery device distributes and independently arranges multiple modular lithium battery devices, connects them in parallel to a common DC bus, and then provides energy power to the load through a busbar assembly.

[0015] As a preferred solution, the shore monitoring center is equipped with a data center, communication links, and a supervision system, which obtains data from the ship power management system PMS by communication to achieve ship-shore information interaction and supervision. The data center stores historical data information on ship operation and provides data information query, analysis, and decision support.

[0016] Another technical problem to be solved by the present invention is to provide an operation control method for the above-mentioned integrated platform of the box-type power lithium battery device for ship application.

[0017] In order to solve the above technical problems, the technical solution adopted by the present invention is an operation control method of a ship application box-type power lithium battery device integrated platform, comprising the following steps:

[0018] Step 1: Power on the system

[0019] The system is powered on and started, and the ship's power management system PMS and battery management system BMS perform self-tests and establish communication connections;

[0020] Step 2: PMS and BMS operation

[0021] The ship power management system PMS and battery management system BMS perform corresponding tasks according to their respective operation scheduling processes, including regular data collection and processing, sending and receiving instructions and execution;

[0022] S21: Create a thread

[0023] The management module of the ship power management system PMS and the battery management module of the battery management system BMS create their own running threads, including data collection, data processing, and command parsing;

[0024] S22: Data Collection and Storage

[0025] The ship power management system PMS and battery management system BMS run independently at the same time. According to the created threads, the master controller and main controller regularly collect and store data information of temperature, current, voltage and control signals, and regularly exchange data and information in communication mode;

[0026] S23: Data processing and control

[0027] The ship power management system PMS performs load power distribution and implements monitoring and control of the ship's power system; the battery management system BMS performs lithium battery pack battery status monitoring, battery pack state of charge SOC estimation, battery pack health status SOH analysis, safety protection, and real-time information exchange;

[0028] S24: Data and Information Interaction

[0029] It includes data interaction between the ship power management system PMS and the battery management system BMS, and the shore monitoring center, as well as the internal data interaction between the ship power management system PMS and the battery management system BMS; the ship power management system PMS receives the uploaded data from the main controller of the battery management system BMS in a regular manner through communication, and the shore monitoring center obtains data from the data center, and executes the corresponding working condition instruction operation according to the data processing results:

[0030] Working condition 1: Increase or decrease propulsion power, and execute step 3;

[0031] Working condition 2: Lithium battery charging, proceed to step 4;

[0032] Condition 3: Range prediction, execute step 5;

[0033] Condition 4: Abnormal return, execute step 6;

[0034] Working condition 5: Working conditions 1 to 4 do not exist, and S22-S24 are repeated;

[0035] Step 3: Increase or decrease propulsion power

[0036] When the ship power management system PMS needs to increase or decrease the propulsion power according to the propulsion load requirements, it determines whether to enable or disable the relevant battery pack through the battery pack state of charge SOC value obtained from the battery management system BMS; then proceed to step seven;

[0037] Step 4: Charging the lithium battery pack

[0038] The battery management system BMS executes the charging instruction. After charging is completed, it sends a signal to the ship power management system PMS, stops charging, and continues to execute the battery management system BMS system thread itself; then proceeds to step seven;

[0039] Step 5: Flight mileage forecast

[0040] When the ship power management system PMS receives the external command for mileage prediction, the ship power management system PMS obtains the current battery state of charge SOC value from the battery management system BMS, provides and displays the mileage prediction value according to the relationship model between mileage and battery state of charge SOC, and then proceeds to step seven;

[0041] Among them, the mileage prediction is carried out through data aggregation and analysis by the ship power management system PMS, including grouping the ship speed v, calculating the mileage, calculating the total power consumption P and estimating the state of charge SOC value, and establishing a set of relationship models between mileage and power consumption at different speeds:

[0042]

[0043] Where: L is the mileage of a ship in a voyage time t; Pi(t), Ui(t), Ii(t) are the power consumption of the i-th load in the ship's voyage, and the load voltage and load current recorded in the sampling period are determined and solved by the fitting method; P is the total power consumed by n loads in this voyage mileage within the total voyage time T;

[0044] For a certain speed, the ampere-hour integration method is used to obtain a model for estimating the battery state of charge SOC value at a certain time or a certain voyage, and the corresponding values ​​of the mileage L and the state of charge SOC are recorded in the database, specifically:

[0045]

[0046] Where: SOC is the current battery state of charge, SOC0 is the battery state of charge at the beginning of the voyage; C t is the change in battery capacity during the flight time t, C is the total capacity of the battery, charging is represented by a “+” sign, and discharging is represented by a “-” sign; I is the current of the battery circuit recorded within the determined sampling period;

[0047] According to model (2), several corresponding values ​​of mileage L and battery state of charge SOC are obtained and recorded in the management database. A polynomial fitting algorithm is used to establish a set of corresponding values ​​of mileage l and battery state of charge SOC at different sailing speeds. vi Relational Model:

[0048]

[0049] The predicted cruising range value l is obtained by using the above-mentioned relationship model between the predicted cruising range value l and the current battery state of charge SOCvi;

[0050] Step 6: Abnormal return

[0051] When the lithium battery pack is too low and the aircraft cannot return home normally, the optimal speed-to-power ratio is calculated based on the data in the database, and the propulsion power for returning home is recommended; then the process goes to step seven;

[0052] Step 7: Loop judgment

[0053] The ship power management system PMS and the battery management system BMS system automatically determine whether the power is off. If the ship power management system PMS or the battery management system BMS system determines that the system is powered off, the current operation is terminated; otherwise, go to step 2.

[0054] As a preferred solution, in step 6, the optimal speed-to-power ratio is calculated based on the data in the database, and the return propulsion power is recommended, as follows:

[0055] The ship power management system PMS aggregates data to group speeds, calculate mileage, total power consumption and estimate the state of charge SOC value, and establishes a relationship model between mileage and power consumption at different speeds:

[0056]

[0057] Where: L is the mileage of a ship in a voyage time t; Pi(t), Ui(t), Ii(t) are the power consumption of the i-th load in the ship's voyage, and the load voltage and current recorded in the sampling period are determined and solved by the fitting method; P is the total power consumed by n loads in this voyage mileage within the total voyage time T;

[0058] According to the relationship model (1) between mileage and power consumption at different speeds, several mileages L and total power consumption P are obtained and recorded in the management database. A set of predicted mileage values ​​l and power consumption P at different speeds are established using a polynomial fitting algorithm. vi According to model (2), the mileage and battery state of charge values ​​are obtained and recorded in the management database, and a polynomial fitting algorithm is used to establish a set of mileage prediction values ​​l and battery state of charge SOC at different sailing speeds. vi Relational Model:

[0059]

[0060] And the propulsion power consumption P is obtained from model (3): vi and battery state of charge SOC vi Relational Model:

[0061]

[0062] The relationship models between propulsion resistance and sailing speed and between effective propulsion power and sailing speed under different sailing conditions are as follows:

[0063]

[0064] In the formula, R vi The ship's sailing resistance is calculated by empirical formula considering the combined effects of hull resistance, wave resistance and viscous resistance at different speeds; P yi It is the effective power of ship propulsion;

[0065] When the ship is performing a navigation mission, according to the SOC estimation value provided by the lithium battery management system BMS, the navigation mileage and battery SOC relationship model (3) is used to obtain the predicted navigation mileage value l, and provide an alarm signal within the determined mileage;

[0066] When the ship power management system PMS detects that the battery power is too low to return normally, in order to avoid affecting the safety of the ship, based on the input data obtained from the applicable ship type and propulsion form, according to model (4) and model (5), the ship power management system PMS selects the optimal speed / power ratio and gives the recommended return propulsion power, supporting the normal return of pure battery ships under abnormal circumstances.

[0067] As a preferred solution, the collaborative operation mode between the ship-end box-type lithium battery device and the ship power management system PMS is realized through information interaction, data processing and collaborative decision-making between the lithium battery management system BMS and the management database.

[0068] As a preferred solution, the management database is provided with a database of correspondences between the ship's speed v, sailing time t, sailing mileage, load current and load voltage.

[0069] The beneficial effects of the present invention are:

[0070] 1. This integrated platform adopts a distributed ship power battery application strategy of vertical stratification and horizontal integration, develops a box-type power lithium battery integration platform for ship application and its ship-side device and management system BMS, which is responsible for the safe operation, energy control and information management of power batteries, including battery status monitoring, SOC estimation, SOH analysis, safety protection, information interaction (including man-machine, peripherals, etc.); under the condition of meeting the ship's use requirements, according to the battery status and propulsion status data, while improving the power system's operating efficiency and dynamic response capability, the purpose of extending the battery system's service life is achieved.

[0071] 2. This integrated platform develops a collaborative operation mode between the ship power management system PMS and the battery management system BMS. The ship power management system PMS and the battery management system BMS communicate and interact through the industrial bus, comprehensively consider the safety and usage requirements of the battery power system, and use the charge and discharge status SOC, health status SOH and other information of each modular battery to control and manage the battery system in real time.

[0072] 3. This integrated platform receives real-time data on the status of lithium batteries in box-type power lithium battery devices through the ship power management system PMS, and realizes endurance time prediction and real-time warning according to user usage habits.

[0073] 4. When the battery power is too low, it is easy to have abnormal situations where the ship cannot return normally. In order to avoid affecting the safety of ship use, this integrated platform considers the optimal speed / power ratio and gives the recommended return propulsion power based on the input data such as the applied ship type and propulsion form, supporting the return of pure battery ships under abnormal circumstances.

[0074] 5. By collecting the operating data and measurement data recorded in the lithium battery management system BMS, a status information database is established and stored in the database of the ship power management system PMS1. The shore monitoring center obtains data by communication to realize "ship-shore" information interaction and supervision. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] Figure 1 A schematic diagram of the composition and connection relationship of the lithium battery integrated platform of the present invention;

[0076] Figure 2 It is a composition diagram of the ship end box type lithium battery device of the present invention;

[0077] Figure 3It is a single-line diagram of the ship-end box-type lithium battery device of the present invention;

[0078] Figure 4 This is a composition diagram of the ship-end box-type lithium battery management system of the present invention;

[0079] Figure 5 The relationship model between ship propulsion power and battery charge state of the present invention;

[0080] Figure 6 The lithium battery device composition and control logic relationship diagram of the present invention;

[0081] Figure 7 The lithium battery integrated platform of the present invention runs a control process.

[0082] In the figure:

[0083] A-shipside box-type lithium battery device, B-ship power management system PMS, C-shore monitoring center; B1-management database, B2-communication interface, B3-management module; C1-data center, C2-communication link, C3-supervision system;

[0084] 1-Battery management system BMS, 2-Lithium battery device, 3-Common DC bus, 4-Convergence component, 5-Load, 6-Photovoltaic component, 7-Shore power socket group, 8-Generator;

[0085] 10- master controller, 10a- display screen, 10b- power module, 11- battery management module, 111- slave control management module, 112- master control management module, 113- master control management module, 114- database A;

[0086] 20-main controller, 20a-display screen, 21-battery cluster, 212-lithium battery module, 210-battery pack, slave controller 1 211, battery module 2 213; slave controller 2 221, battery module 3 222, battery module 4 223;

[0087] 711-DC shore power socket 1, 712-DC shore power socket 2, 720-AC shore power socket; T1-isolation transformer assembly 1, T2-isolation transformer assembly 2. DETAILED DESCRIPTION

[0088] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0089] like Figure 1-4As shown, an integrated platform for box-type power lithium battery devices for ship applications includes a ship-side box-type lithium battery device A, a ship power management system PMS B and a shore-side monitoring center C; the ship-side box-type lithium battery device A is used to provide lithium battery power for the ship and manage the operation of the lithium battery; the ship power management system PMS B has the ability to monitor and control the power system / equipment of the entire ship, and the ship power management system PMS B interacts with the ship-side box-type lithium battery device A in a communication manner to ensure the stable operation of the ship-side box-type lithium battery device A and supports the safe return of the ship in an emergency; the shore-side monitoring center C is equipped with a data center C1, a communication link C2, and a supervision system C3, and obtains data from the ship power management system PMS B in a communication manner to realize "ship-shore" information interaction and supervision, and the data center C1 stores historical data information of ship operation and provides data information query, analysis and decision support.

[0090] The ship-end box-type lithium battery device A comprises a lithium battery management system BMS1, a lithium battery device 2, a common DC bus 3, a bus assembly 4, a load 5, a photovoltaic assembly 6, a shore power socket group 7 and a generator 8; the lithium battery management system BMS1 is connected to the lithium battery device 2 via a data line and a signal line, and its main function is to be responsible for the safe operation of the lithium battery device, and to prevent the battery from being overcharged, over-discharged and over-heated, and to control the battery charge and discharge balance by monitoring the operating status parameters of the battery, thereby extending the battery life and utilization rate, including lithium battery status monitoring, SOC estimation, SOH analysis, safety protection and information interaction (including human-machine, peripherals, etc.); the ship-end box-type lithium battery device A provided in this embodiment distributes and independently arranges multiple modular lithium battery devices 2, connects them to the common DC bus 3 in parallel, forms a large-capacity lithium battery group, and then provides energy and power to the load 5 (including propulsion load and daily load, etc.) through the bus assembly 4, thereby avoiding the problem of direct parallel connection of batteries in a large-capacity battery system.

[0091] The lithium battery management system BMS1 includes a main controller 10, a display screen 10a, a power module 10b, and a battery management module 11. The main controller 10 is connected to the display screen 10a for displaying processing results; the power module 10b provides working power for the main controller 10; the battery management module 11 includes a slave control management module 111, a master control management module 112, a master control management module 113 and a database A114. The battery management module 11 executes data collection, storage, and calculation of the main controller 10 and the lithium battery device 2 through communication, and executes the instructions of the corresponding processing results respectively.

[0092] The ship power management system PMS B includes a management database B1, a communication interface B2 and a management module B3. It communicates with the lithium battery management system BMS1 using an industrial bus and exchanges data through the communication interface B2 to achieve coordinated operation with the ship-end box-type lithium battery device A, distribute power to the ship, and manage the energy efficiency of the lithium battery device A.

[0093] The ship power management system PMS B establishes a status information database for the operation data and monitoring data collected and recorded in the lithium battery management system BMS1 through the communication interface B2 and the management module B3, and stores it in the management database B1 for the operation management of the ship power system; the supervision system C3 of the shore monitoring center C remotely monitors the ship-side box-type lithium battery device A and the ship power management system PMS B in real time through the communication link C2; the data support of the management database B1 and the data center C1 is provided by the lithium battery management system BMS1.

[0094] In order to adapt to the power changes of the ship-end box-type lithium battery device A, or require an increase or decrease in the propulsion load, such as changes in load, speed, water depth, etc., the ship power management system PMS B is required to adjust the propulsion power (increase or decrease), and the ship power management system PMS B and the lithium battery management system BMS1 cooperate to adjust the number of open multiple modular lithium battery devices 2 in a distributed layout for implementation; when the ship power management system PMS B requires an increase in the propulsion load, the current state of charge SOC value of the lithium battery pack is obtained through data analysis in the management database B1, which is used to adjust the number of open lithium battery devices 2, or to predict the sailing mileage, or to send a charging signal to the lithium battery management system BMS1, and the lithium battery management system BMS1 implements charging management.

[0095] The collaborative operation mode between the ship-end box-type lithium battery device A and the ship power management system PMS B is realized through information interaction, data processing and collaborative decision-making between the lithium battery management system BMS1 and the management database B1: considering the different sailing resistance under different sea conditions, the management database B1 is equipped with a ship structure parameter database, a resistance and propulsion power calculation database corresponding to the sailing conditions, and a database of corresponding relationships between the ship speed v, sailing time t and load current, load voltage (energy-consuming equipment and devices, etc.). Among them: the ship speed v and sailing time t are obtained through the ship power management system PMS B; the propulsion load current and propulsion load voltage, daily load current and daily load voltage, and the lithium battery pack state of charge SOC (%) are all obtained through the lithium battery management system BMS1;

[0096] The collaborative operation mode between the ship power management system PMS B and the lithium battery management system BMS1 can also be extended to external equipment such as the energy management system EMS or the monitoring alarm system AMS for data information transmission and monitoring. The ship power management system PMS ensures a stable and reliable power supply for the ship, realizes efficient, fast and stable automatic control of the system, and enables the ship's power system to complete its respective work tasks; when the system fails, it can give a fault alarm signal, provide fault handling prompts for operators, and record historical fault information and handling solutions for timely maintenance and fault handling of the ship.

[0097] like Figure 5 As shown, the lithium battery device 2 includes a main controller 20, a display screen 20a and a plurality of battery clusters 21, each battery cluster 21 includes a plurality of battery packs 210 connected in series, and each lithium battery pack is composed of a slave controller and at least 2-4 battery modules, such as a slave controller 1 211 and a battery module 1 212, a battery module 213 form a battery pack, a slave controller 221 and a battery module 3 222, a battery module 4 223 form a second battery pack, etc.; the main controller 20 and the battery pack 210 interact with each other through the slave controllers in a communication manner, and the adjacent battery packs interact with each other in a communication manner through their respective slave controllers, so as to realize the operation monitoring and management service of the lithium battery pack 210; the lithium battery management system BMS1 transmits and processes data with the main controller 20 of the lithium battery device 2 through the communication interface of the main controller 10, monitors the operation status of the lithium battery device 2 and performs corresponding instruction processing;

[0098] The common DC bus 3 can be in the form of a ring DC busbar to achieve more flexible system rapid protection and fault repair; the busbar assembly 4 is used to aggregate and control the power of multiple lithium battery devices 2, and the load 5 includes the ship propulsion load and the daily power load; the photovoltaic assembly 6 can provide emergency power supplement. The shore power socket group 7 includes a DC shore power socket 1 711, a DC shore power socket 2 712, and an AC shore power socket 720; used to charge the lithium battery through the common DC bus 3. The generator 8 is used to charge the lithium battery device 2 under emergency or sudden working conditions.

[0099] The common DC bus 3 is provided with a bus tie switch, which is normally closed during normal operation and disconnected during shore power charging; an isolation transformer assembly T1 and an isolation transformer assembly T2 are provided between the AC shore power socket 720, the generator 8 and the common DC bus 3. During normal operation, the isolation transformer assembly T1 and the isolation transformer assembly T2 operate simultaneously to supply power to the AC distribution board; when charging at shore, the isolation transformer assembly T1 and the isolation transformer assembly T2 operate simultaneously to reversely charge the lithium battery device 2 through the AC shore power.

[0100] like Figure 6As shown, a method for operating and controlling a box-type power lithium battery device integrated platform for ship application comprises the following steps:

[0101] Step 1: Power on the system

[0102] The system is powered on and started, and the ship power management system PMS B and the battery management system BMS1 perform self-tests and establish communication connections, including the supervision system C3 of the shore monitoring center C remotely connecting with the ship power management system PMS B through the communication link C2;

[0103] Step 2: PMS, BMS and shore monitoring center operation

[0104] The ship power management system PMS B, battery management system BMS1, and supervision system C3 perform corresponding operation tasks according to their respective operation scheduling processes, including regular data collection and processing, sending and receiving instructions and execution;

[0105] S21: Create a thread

[0106] The management module B3 of the ship power management system PMS B, the battery management module 11 of the battery management system BMS1, and the supervision system C3 respectively create their own running threads, including data collection, data processing, and command parsing;

[0107] S22: Data Collection and Storage

[0108] The ship power management system PMS B and the battery management system BMS1 run independently at the same time. According to the created threads, the data information of temperature, current, voltage and control signal are collected and stored regularly through the master controller 10 and the main controller 20, and data and information are exchanged regularly in a communication mode;

[0109] S23: Data processing and control

[0110] The ship power management system PMS system performs load power distribution and implements monitoring and control of the entire ship power system; the battery management system BMS system performs lithium battery pack battery status monitoring, battery pack state of charge SOC estimation, battery pack health status SOH analysis, safety protection, and real-time information exchange;

[0111] S24: Data and Information Interaction

[0112] Including data interaction between the ship power management system PMS B and the battery management system BMS1, and the shore monitoring center C, as well as the internal data interaction between the ship power management system PMS B and the battery management system BMS1; the ship power management system PMS B receives the uploaded data from the master controller 10 of the battery management system BMS1 in a regular manner through communication, and the shore monitoring center C obtains data from the data center B1, and executes the corresponding working condition instruction operation according to the data processing results:

[0113] Working condition 1: Increase or decrease propulsion power, and execute step 3;

[0114] Working condition 2: Lithium battery charging, proceed to step 4;

[0115] Condition 3: Range prediction, execute step 5;

[0116] Condition 4: Abnormal return, execute step 6;

[0117] Working condition 5: Working conditions 1 to 4 do not exist, and S22-S24 are repeated;

[0118] Step 3: Increase or decrease propulsion power

[0119] When the ship power management system PMS B needs to increase or decrease the propulsion power according to the propulsion load requirement, it determines whether to enable or disable the relevant battery pack through the battery pack state of charge SOC value obtained from the battery management system BMS1; then proceeds to step seven;

[0120] Step 4: Charging the lithium battery pack

[0121] The battery management system BMS1 executes the charging instruction. After charging is completed, it sends a signal to the ship power management system PMS, stops charging, and continues to execute the battery management system BMS system thread itself; then proceeds to step seven;

[0122] Step 5: Flight mileage forecast

[0123] When the ship power management system PMS B receives the external command for mileage prediction, the ship power management system PMSB obtains the current battery state of charge SOC value from the battery management system BMS1, provides the predicted value of mileage according to the relationship model between mileage and battery state of charge SOC, and displays it; then proceeds to step seven;

[0124] Among them, the mileage prediction is carried out through data aggregation and analysis by the ship power management system PMS B, including grouping the ship speed v, calculating the mileage, calculating the total power consumption P and estimating the state of charge SOC value, and establishing a set of relationship models between mileage and power consumption at different speeds:

[0125]

[0126] Where: L is the mileage of a ship in a voyage time t; Pi(t), Ui(t), Ii(t) are the power consumption of the i-th load in the ship's voyage, and the load voltage and load current recorded in the sampling period are determined and solved by the fitting method; P is the total power consumed by n loads in this voyage mileage within the total voyage time T;

[0127] For a certain speed, the ampere-hour integration method is used to estimate the battery state of charge SOC value at a certain time or a certain voyage, and the corresponding value of the mileage L and the state of charge SOC is recorded in the database, specifically:

[0128]

[0129] Where: SOC is the current battery state of charge, SOC0 is the battery state of charge at the beginning of the voyage; C t is the change in battery capacity during the flight time t, C is the total capacity of the battery, charging is represented by a “+” sign, and discharging is represented by a “-” sign; I is the current of the battery circuit recorded within the determined sampling period;

[0130] According to model (2), several corresponding values ​​of mileage L and battery state of charge SOC are obtained and recorded in the management database B1. A polynomial fitting algorithm is used to establish a set of corresponding values ​​of mileage l and battery state of charge SOC at different sailing speeds. vi Relational Model:

[0131]

[0132] The predicted cruising range value l is obtained by using the above-mentioned relationship model between the predicted cruising range value l and the current battery state of charge SOCvi;

[0133] Step 6: Abnormal return

[0134] When the lithium battery pack is too low and the aircraft cannot return home normally, the optimal speed-to-power ratio is calculated based on the data in the database, and the recommended return propulsion power is as follows:

[0135] The ship power management system PMS B establishes a relationship model between the mileage and power consumption at different speeds by summarizing data to group the speeds, calculate the mileage, total power consumption and estimate the state of charge SOC value:

[0136]

[0137] Where: L is the mileage of a ship in a voyage time t; Pi(t), Ui(t), Ii(t) are the power consumption of the i-th load in the ship's voyage, and the load voltage and current recorded in the sampling period are determined and solved by the fitting method; P is the total power consumed by n loads in this voyage mileage within the total voyage time T;

[0138] According to the relationship model (1) between mileage and power consumption at different speeds, several mileages L and total power consumption P are obtained and recorded in the management database B1. A set of predicted mileage values ​​l and power consumption P at different speeds are established by using a polynomial fitting algorithm. vi and according to model (2), the mileage and battery state of charge values ​​are obtained and recorded in the management database B1, and a polynomial fitting algorithm is used to establish a set of mileage prediction values ​​l and battery state of charge SOC at different sailing speeds. vi Relational Model:

[0139]

[0140] And the propulsion power consumption P is obtained from model (3): vi and battery state of charge SOC vi Relational Model:

[0141]

[0142] The relationship models between propulsion resistance and sailing speed and between effective propulsion power and sailing speed under different sailing conditions are as follows:

[0143]

[0144] In the formula, R vi The ship's sailing resistance is calculated by empirical formula considering the combined effects of hull resistance, wave resistance and viscous resistance at different speeds; P yi It is the effective power of ship propulsion;

[0145] When the ship is performing a navigation mission, according to the SOC estimation value provided by the lithium battery management system BMS1, the navigation mileage and battery SOC relationship model (3) is used to obtain the navigation mileage prediction value l, and provide an alarm signal within the determined mileage;

[0146] When the ship power management system PMS B detects that the battery power is too low to return normally, in order to avoid affecting the safety of the ship, according to the input data obtained from the applied ship type and propulsion form, according to model (4) and model (5), the ship power management system PMS B selects the optimal speed / power ratio and gives the recommended return propulsion power to support the normal return of pure battery ships under abnormal conditions;

[0147] Then go to step seven;

[0148] Step 7: Loop judgment

[0149] The ship power management system PMS B and the battery management system BMS1 system can automatically receive external power-off instructions and determine whether to end the current cycle. If the ship power management system PMSB or the battery management system BMS1 system determines that the system is powered off, the operation is ended; otherwise, go to step 2.

[0150] The above-mentioned embodiments are only illustrative of the principles and effects of the invention, as well as some embodiments of its application, and are not intended to limit the invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the invention, and all of these belong to the protection scope of the invention.

Claims

1. An integrated platform for box-type power lithium battery devices for ship applications, comprising a ship-side box-type lithium battery device (A), a ship power management system PMS (B) and a shore-side monitoring center (C); the ship-side box-type lithium battery device (A) is used to provide lithium battery power for the ship and manage the operation of the lithium battery; the ship power management system PMS (B) has the ability to monitor and control the power system / equipment of the entire ship, and the ship power management system PMS (B) interacts with the ship-side box-type lithium battery device (A) in a communication manner to ensure the stable operation of the ship-side box-type lithium battery device (A) and the safe return of the ship; the shore-side monitoring center (C) obtains data from the ship power management system PMS (B) in a communication manner to realize ship-shore information interaction and supervision; The ship-end box-type lithium battery device (A) comprises a lithium battery management system BMS (1), a lithium battery device (2), a common DC bus (3), a busbar assembly (4), a load (5), a photovoltaic assembly (6), a shore power socket assembly (7) and a generator (8); Features: The lithium battery management system BMS (1) comprises a master controller (10), a display screen (10a), a power module (10b), and a battery management module (11); the power module (10b) provides a working voltage for the master controller (10); the battery management module (11) comprises a slave control management module (111), a master control management module (112), a master control management module (113), and a database A (114); the battery management module (11) performs data collection, storage, and calculation of the master controller (10) and the lithium battery device (2) through a communication method, and executes the issuance of instructions for corresponding processing results respectively; The ship power management system PMS (B) and the lithium battery management system BMS (1) adopt industrial bus communication and exchange data through the communication interface (B2), so as to realize coordinated operation with the ship-end box-type lithium battery device (A), distribute electric energy to the ship and perform energy efficiency management on the lithium battery device (A); The ship power management system PMS (B) establishes a status information database for the operation data and monitoring data collected and recorded in the lithium battery management system BMS (1) through the communication interface (B2) and the management module (B3), and stores the data in the management database (B1) for the operation management of the ship power system; the shore monitoring center (C) remotely monitors the ship-side box-type lithium battery device (A) and the ship power management system PMS (B) in real time; the data support of the management database (B1) and the data center (C1) is provided by the lithium battery management system BMS (1); The lithium battery device (2) comprises a main controller (20), a display screen (20a) and a plurality of battery clusters (21), each battery cluster (21) comprising a plurality of battery packs (210) connected in series, each battery pack (210) comprising a slave controller and at least two battery modules, the main controller (20) and the battery pack (210) interact with each other in a communication manner through the slave controller, and adjacent battery packs interact with each other in a communication manner through their respective slave controllers, thereby realizing operation monitoring and management services for the lithium battery packs (210); the lithium battery management system BMS (1) transmits and processes data with the main controller (20) of the lithium battery device (2) through the communication interface of the master controller (10), monitors the operation status of the lithium battery device (2) and performs corresponding instruction processing; the load (5) comprises a ship propulsion load and a daily electricity load.

2. A box-type power lithium battery device integrated platform for ship application as claimed in claim 1, characterized in that: The shore power socket group (7) and the generator (8) charge the lithium battery through the common DC bus (3) or provide electric energy to the load under emergency conditions.

3. A box-type power lithium battery device integrated platform for ship application as claimed in claim 2, characterized in that: The shore power socket group (7) comprises a DC shore power socket 1 (711), a DC shore power socket 2 (712), and an AC shore power socket (720).

4. A box-type power lithium battery device integrated platform for ship application as claimed in claim 3, characterized in that: The common DC bus (3) is provided with a bus tie switch, which is normally closed during normal operation and disconnected during shore power charging; an isolation transformer assembly 1 (T1) and an isolation transformer assembly 2 (T2) are provided between the AC shore power socket (720), the generator (8) and the common DC bus (3); during normal operation, the isolation transformer assembly 1 (T1) and the isolation transformer assembly 2 (T2) operate simultaneously to supply power to the AC distribution board; when charging at shore, the isolation transformer assembly 1 (T1) and the isolation transformer assembly 2 (T2) operate simultaneously to reversely charge the lithium battery device 2 through the AC shore power.

5. The integrated platform of box-type power lithium battery device for ship application as claimed in claim 1, characterized in that: The ship-end box-type lithium battery device (A) independently and distributedly arranges multiple modular lithium battery devices (2), connects them to a common DC bus (3) in parallel, and then provides energy and power to a load (5) through a busbar assembly (4).

6. A box-type power lithium battery device integrated platform for ship application as claimed in claim 1, characterized in that: The shore monitoring center (C) is equipped with a data center (C1), a communication link (C2), and a supervision system (C3), and obtains data from the ship power management system PMS (B) by communication to achieve ship-shore information interaction and supervision. The data center (C1) stores historical data information of ship operation and provides data information query, analysis and decision support.

7. An operation control method for a box-type power lithium battery device integrated platform for ship application as claimed in any one of claims 1 to 6, comprising the following steps: Step 1: Power on the system The system is powered on and started, and the ship's power management system PMS (B) and battery management system BMS (1) perform self-tests and establish communication connections; Step 2: PMS and BMS operation The ship power management system PMS and battery management system BMS perform corresponding tasks according to their respective operation scheduling processes, including regular data collection and processing, sending and receiving instructions and execution; S21: Create a thread The management module (B3) of the ship power management system PMS (B) and the battery management module (11) of the battery management system BMS (1) respectively create their own running threads, including data collection, data processing, and command parsing; S22: Data Collection and Storage The ship power management system PMS (B) and the battery management system BMS (1) are independently operated at the same time, and according to the created threads, the data information of temperature, current, voltage and control signal are collected and stored regularly through the general controller (10) and the main controller (20), and data and information are exchanged regularly in a communication mode; S23: Data processing and control The ship power management system PMS system performs load power distribution and implements monitoring and control of the entire ship power system; the battery management system BMS system performs lithium battery pack battery status monitoring, battery pack state of charge SOC estimation, battery pack health status SOH analysis, safety protection, and real-time information exchange; S24: Data and Information Interaction The invention comprises data interaction between a ship power management system PMS (B) and a battery management system BMS (1) and a shore monitoring center (C), as well as internal data interaction between the ship power management system PMS (B) and the battery management system BMS (1); the ship power management system PMS (B) receives the uploaded data from the master controller (10) of the battery management system BMS (1) in a communication manner at regular intervals, and the shore monitoring center (C) obtains the data from the data center (B1), and executes the corresponding working condition instruction operation according to the data processing result: Working condition 1: increase or decrease propulsion power, execute step 3; Working condition 2: Lithium battery charging, proceed to step 4; Condition 3: Range prediction, execute step 5; Condition 4: Abnormal return, execute step 6; Working condition 5: Working conditions 1 to 4 do not exist, and S22-S24 are repeated; Step 3: Increase or decrease propulsion power When the ship power management system PMS (B) needs to increase or decrease the propulsion power according to the propulsion load requirement, it determines whether to enable or disable the relevant battery pack by using the battery pack state of charge SOC value obtained from the battery management system BMS (1); Then go to step seven; Step 4: Charging the lithium battery pack The battery management system BMS (1) executes the charging instruction. After the charging is completed, it sends a signal to the ship power management system PMS, stops charging, and continues to execute the battery management system BMS system thread itself; then proceeds to step seven; Step 5: Flight mileage forecast When the ship power management system PMS (B) receives the external command for mileage prediction, the ship power management system PMS (B) obtains the current battery state of charge SOC value from the battery management system BMS (1), provides and displays the mileage prediction value according to the relationship model between mileage and battery state of charge SOC, and then proceeds to step seven; The mileage prediction is carried out by the ship power management system PMS(B) through data aggregation and analysis, including grouping the ship speed v, calculating the mileage, calculating the total power consumption P and estimating the state of charge SOC value, and establishing a set of relationship models between the mileage and power consumption at different speeds: Where: L is the mileage of a ship in a voyage time t; Pi(t), Ui(t), Ii(t) are the power consumption of the i-th load in the ship's voyage, and the load voltage and load current recorded in the sampling period are determined and solved by the fitting method; P is the total power consumed by n loads in this voyage mileage within the total voyage time T; For a certain speed, the ampere-hour integration method is used to obtain a model for estimating the battery state of charge SOC value at a certain time or a certain voyage, and the corresponding values ​​of the mileage L and the state of charge SOC are recorded in the database, specifically: Where: SOC is the current battery state of charge, SOC0 is the battery state of charge at the beginning of the voyage; C t is the change in battery capacity during the flight time t, C is the total capacity of the battery, with a "+" sign for charging and a "-" sign for discharging; I is the current of the battery circuit recorded within the determined sampling period; According to model (2), a number of corresponding values ​​of mileage L and battery state of charge SOC are obtained and recorded in the management database (B1). A polynomial fitting algorithm is used to establish a set of corresponding values ​​of mileage l and battery state of charge SOC at different sailing speeds. vi Relational Model: The predicted cruising range value l is obtained by using the above-mentioned relationship model between the predicted cruising range value l and the current battery state of charge SOCvi; Step 6: Abnormal return When the lithium battery pack is too low and the aircraft cannot return home normally, the optimal speed-to-power ratio is calculated based on the data in the database, and the propulsion power for returning home is recommended; then the process goes to step seven; Step 7: Loop judgment The ship power management system PMS and the battery management system BMS system automatically determine whether the power is off. If the ship power management system PMS or the battery management system BMS system determines that the system is powered off, the current operation is terminated; otherwise, go to step 2.

8. An operation control method for the integrated platform of a box-type power lithium battery device for ship application as claimed in claim 7, characterized in that: In step 6, the optimal speed-to-power ratio is calculated based on the data in the database, and the return propulsion power is recommended, as follows: The ship power management system PMS (B) establishes a relationship model between the mileage and power consumption at different speeds by summarizing data to group the speeds, calculate the mileage, total power consumption and estimate the state of charge SOC value: Where: L is the mileage of a ship in a voyage time t; Pi(t), Ui(t), Ii(t) are the power consumption of the i-th load in the ship's voyage, and the load voltage and current recorded in the sampling period are determined and solved by the fitting method; P is the total power consumed by n loads in this voyage mileage within the total voyage time T; According to the relationship model (1) between mileage and power consumption at different speeds, several mileages L and total power consumption P are obtained and recorded in the management database (B1). A set of predicted mileage values ​​l and power consumption P at different speeds are established by using a polynomial fitting algorithm. vi and according to the model (2), the mileage and battery state of charge values ​​are obtained and recorded in the management database (B1), and a polynomial fitting algorithm is used to establish a set of mileage prediction values ​​l and battery state of charge SOC at different sailing speeds. vi Relational Model: And the propulsion power consumption P is obtained from model (3): vi and battery state of charge SOC vi Relational Model: The relationship models between propulsion resistance and sailing speed and between effective propulsion power and sailing speed under different sailing conditions are as follows: In the formula, R vi The ship's sailing resistance is calculated by empirical formula considering the combined effects of hull resistance, wave resistance and viscous resistance at different speeds; P yi It is the effective propulsion power of the ship; When the ship is performing a navigation mission, according to the SOC estimation value provided by the lithium battery management system BMS, the navigation mileage and battery SOC relationship model (3) is used to obtain the predicted navigation mileage value l, and provide an alarm signal within the determined mileage; When the ship power management system PMS (B) detects that the battery power is too low to return normally, in order to avoid affecting the safety of the ship, according to the input data obtained from the applicable ship type and propulsion form, according to model (4) and model (5), the ship power management system PMS (B) selects the optimal speed / power ratio and gives the recommended return propulsion power, supporting the normal return of pure battery ships under abnormal circumstances.

9. An operation control method for a box-type power lithium battery device integrated platform for ship application as claimed in claim 7 or 8, characterized in that: The collaborative operation mode between the ship-end box-type lithium battery device (A) and the ship power management system PMS (B) is realized through information interaction, data processing and collaborative decision-making between the lithium battery management system BMS (1) and the management database (B1).

10. An operation control method for the integrated platform of a box-type power lithium battery device for ship application as claimed in claim 9, characterized in that: The management database (B1) is provided with a database of corresponding relationships between the ship's speed v, sailing time t, sailing mileage, load current and load voltage.

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