Marine lithium battery device three-level alarm system and alarm control method thereof

Abstract

The invention discloses a three-level alarm system for a marine lithium battery device. The three-level alarm system comprises a battery cabin, a domain control box, a control device, a management subsystem, an alarm device, a load and external equipment, a lithium battery device is arranged in the battery cabin and provides lithium battery power for a load, the lithium battery device comprises a lithium battery box and a plurality of battery packs arranged in the lithium battery box, each battery pack comprises a plurality of battery clusters connected in parallel, each battery cluster comprises a plurality of battery packs, each battery pack comprises at least two lithium battery modules, and each battery cluster is connected with a high-voltage box; the domain control box is connected with the lithium battery device and serves as a fault information acquisition source and a fault processing execution unit; the control device comprises a slave control module, a master control module and a master control module which are respectively used for monitoring the operation of the lithium battery module, the battery cluster and the battery pack; the control device is matched with the management subsystem to be used for collecting running state data of the lithium battery device, processing fault information and sending an alarm instruction; the management subsystem is provided with first-level, second-level and third-level warning functions.

Description

Technical field:

[0001] The present invention belongs to the technical field of ship power battery systems, and in particular relates to a three-level alarm system for a ship lithium battery device and an alarm control method thereof. Technical background:

[0002] Marine alarm systems are used to monitor fire alarms, ensure navigation safety, promptly reflect personnel safety conditions, and handle emergencies. Early ship safety was mainly achieved by simple signals such as lights and sounds. With the development of industry, mechanical alarm systems and electronic alarm systems have emerged to monitor various states of ship operation. Today, marine alarm systems have been digitized and intelligentized, providing advanced and reliable technical support for ship safety management.

[0003] The main function of the existing alarm system is to monitor the ongoing or potential security threats in the operation process of the monitored object and deal with the fault points in time to reduce or prevent potential injuries or losses. In the operation of the marine lithium battery management system, the alarm system device is crucial to the safe management and operation of the lithium battery device. It can provide timely safety protection and emergency response for the ship during navigation, protect the safety of life and property inside the ship, and improve the safety and reliability of lithium battery use and ship operation in accordance with relevant regulations. Summary of the invention:

[0004] The technical problem to be solved by the present invention is to provide a three-level alarm system for a marine lithium battery device, which can enhance safety protection by real-time monitoring and the operating status of the lithium battery under abnormal conditions, graded processing and graded warning according to the degree of fault impact, and timely reminding the staff. Once an abnormal situation occurs, the system immediately transmits the relevant information to the monitoring center or personal terminal, promptly alerts the dispatcher, and takes corresponding countermeasures as soon as possible.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a three-level alarm system for marine lithium battery devices, including a battery compartment, a domain control box, a control device, a management subsystem, an alarm device, a load and an external device; a lithium battery device is arranged inside the battery compartment to provide lithium battery power for the load, and the lithium battery device includes a lithium battery box and a plurality of battery packs arranged in the lithium battery box, the battery pack includes a plurality of battery clusters connected in parallel, the battery cluster includes a plurality of battery packs, the battery pack includes at least 2 lithium battery modules, and each battery cluster is connected to a high-voltage box; the domain control box is connected to the lithium battery device, and the domain control box serves as a fault information collection source and a fault processing execution unit;

[0006] The control device includes a slave control module, a master control module and a master control module, which are respectively used for the operation monitoring of lithium battery modules, battery clusters and battery packs; the control device cooperates with the management subsystem to collect the operating status data of the lithium battery device, process fault information, and send alarm instructions;

[0007] The lithium battery module is provided with an NTC sensor, and the slave control module is provided with a voltage division detection circuit and an integrated detection circuit AFE. The NTC sensor and the voltage division detection circuit are combined for collecting the temperature of the charging and discharging monomers, the temperature of the OTP monomers, and the temperature and voltage disconnection detection. The integrated detection circuit AFE is used for multi-channel monomer voltage collection; the main circuit of the high-voltage box is provided with a Hall sensor, and the main control module is provided with a detection circuit. The Hall sensor and the detection circuit are used for collecting the charging and discharging current of the main circuit of the high-voltage box; the master control module is provided with a DI module and a DO module for inputting control signal detection to meet the requirements of thermal management, emergency exhaust, and abnormal action protection of relays / circuit breakers;

[0008] The management subsystem includes a database, a data information acquisition module, a data preprocessing module, and a fault information processing module; the data information acquisition module works in conjunction with the control device to store the collected data and the data processed by the data preprocessing module into the database, waiting for the fault information processing module to process; the management subsystem is provided with first-level, second-level and third-level warning functions, the first level is early warning, the second level is alarm, and the third level is protection; each level of alarm function is provided with the same or different number of alarm items according to the needs, the degree of impact or the degree of harm i , i = 1, 2, ..., n, or define different alarm levels for a certain alarm item according to the needs and the degree of damage caused by the fault

[0009] The alarm device is divided into two places. One is located on the side of the bow control console of the ship, with alarm panel 1 and control panel 1. The other is set on the panel of the domain control box, with alarm panel 2 and control panel 2, which jointly realize fault alarm and execute fault handling result operation.

[0010] The load includes busbar components and load equipment; the external equipment is the ship power management system or energy management system, which exchanges information with the control device in a communication manner; the operating failure of the lithium battery device in the battery compartment is monitored by the control device, and is warned and eliminated and restored by the alarm device and the alarm board 1, alarm board 2 and control board 1, control board 2 of the domain control box to ensure the safe operation of the lithium battery device.

[0011] As a preferred solution, each level of alarm function corresponds to a corresponding alarm threshold, action delay, recovery condition, and corresponding execution action setting.

[0012] As a preferred solution, for each of the alarm items P iThe fault status, evaluation parameters and judgment criteria are set. When the management subsystem collects and analyzes fault data, the alarm items P are set. i The attribute elements are classified and processed, and the processing results are classified according to the fault level and the result data is sent to the alarm device. At the same time, the system performs separate processing, including sound and light alarm, display of alarm information, prompting manual intervention adjustment, automatic power reduction and system shutdown. The system defines different processing methods corresponding to the corresponding threshold range;

[0013] As a preferred solution, the control input function of the main control module is used to detect the feedback signal after the DO output and the protection function of the detection system. After the main negative relay is closed, it detects whether the feedback contact of the main negative relay is closed and then determines whether the logic is normal; when detecting the manual maintenance switch MSD and the emergency stop signal of the high-voltage box, an alarm is triggered immediately when the normally closed contact is disconnected during the normal operation of the system; the input voltage detection is used to detect the working input voltage of the main control module, and an alarm is triggered immediately if it exceeds the normal range.

[0014] As a preferred solution, the input voltage detection is performed by using a timer and a counter for continuous comparison, and an alarm is set if the condition is met for a period of time.

[0015] As a preferred solution, the output controlled by the main control module is to control the high-voltage relay to close successively during the charging and discharging process; and during operation, the high-voltage relay is disconnected when a charging completion or charging and discharging stop instruction is received, or other set conditions are met.

[0016] As a preferred solution, the master control module saves various configured alarm thresholds, displays the real-time data, alarms, and system status of the current main control module; the control input function of the master control module is used to respond to and execute external input operation instructions, and is used to select the local / remote operation mode of the battery pack, receive start and stop instructions to control the high voltage power-on and fault reset of the main control module; and detect the protection function of the system. When the emergency stop button is pressed during the normal operation of the system, the normally closed contact is disconnected, which immediately triggers the master control module alarm and urgently cuts off the power output of the battery pack; the output controlled by the master control module is to display the current operating status indicator light during the charging and discharging process, and emit an audible and visual alarm when an alarm is generated.

[0017] The technical problem to be solved by the present invention is to provide an alarm control method for the three-level alarm system of the marine lithium battery device as described above.

[0018] In order to solve the above technical problems, the technical solution adopted by the present invention is: an alarm control method of the three-level alarm system of the marine lithium battery device as described above, comprising the following steps:

[0019] Step 1: Power on the lithium battery device;

[0020] Power on the lithium battery device, start the system and self-check. If the self-check result is normal, proceed to step 2. If the self-check result is abnormal, reset and restart the system and self-check until the self-check result is normal.

[0021] Step 2: Data signal acquisition periodic cycle operation

[0022] The management subsystem (BMS) enters a timed cycle operation, that is, the data information acquisition module collects data, the data preprocessing module and the data processing module respectively perform data preprocessing and related analysis and calculation, and regularly sends data to the lithium battery management system PMS;

[0023] Step 3: Threshold comparison

[0024] Compare the alarm threshold and recovery conditions according to the three-level alarm function definition, and send instructions to the alarm device;

[0025] Step 4: Execute the alarm

[0026] After receiving the command, the alarm device processes the command accordingly, including system or device action delay and alarm execution;

[0027] Step 5: Repeat steps 2 to 4 until the system is powered off, ending system operation.

[0028] The beneficial effects of the present invention are:

[0029] (1) As ships use large-capacity lithium batteries and have a complex working environment, setting alarms according to the degree of fault impact is conducive to simplifying data processing, improving fault judgment accuracy, avoiding missing fault points, facilitating fault handling and system maintenance, and improving the reliability of battery system protection;

[0030] (2) Considering the particularity of the working environment of the ship's cabin, the alarm devices are deployed in a distributed manner on the navigation console and the battery compartment to ensure that fault handling is responded to quickly and measures are taken, thereby minimizing losses.

[0031] (3) All-round protection is achieved. The system uses different technical means, such as sensors and detection circuits, to cover multiple layers of protection areas (battery packs, battery clusters, etc.), provide all-round safety protection, improve the efficiency of responding to emergencies, and enhance the overall safety protection capabilities.

[0032] (4) In the event of an accident, the alarm information will be transmitted to the battery compartment and the console. The existence of the alarm system device can provide timely feedback on the status, improve the overall response speed, and facilitate the control station personnel to take timely and reasonable response measures to minimize the loss of personnel and property. Description of the drawings:

[0033] Figure 1 It is a composition diagram of the alarm system of the present invention;

[0034] Figure 2 The data collection and processing principle diagram of the alarm system of the present invention;

[0035] Figure 3 It is the layout diagram of the alarm device of the present invention;

[0036] Figure 4 It is the working flow chart of the alarm system of the present invention;

[0037] In the attached figure:

[0038] 1-battery compartment, 2-domain control box, 3-control device, 4-management subsystem (BMS), 5-alarm device, 6-load, 7-external equipment;

[0039] 10-high voltage box, 11-lithium battery module, 12-battery pack, 21-alarm panel 2, 22-control panel 2, 31-slave control module, 32-master control module, 33-general control module; 40-database, 41-data information acquisition module, 42-data preprocessing module, 43-fault information processing module; 51-alarm panel 1, 52-control panel 1, 510-including domain control box panel, 521-emergency stop button 1, 522-emergency stop button 2, 530-driving console panel, 540-start-stop control panel; 61-convergence component, 62-load equipment. Specific implementation method:

[0040] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0041] like Figure 1-3 As shown, a three-level alarm system for marine lithium battery devices includes a battery compartment 1, a domain control box 2, a control device 3, a management subsystem (BMS) 4, an alarm device 5, a load 6 and an external device 7; a lithium battery device is arranged inside the battery compartment 1 to provide lithium battery power for the load 6, the lithium battery device includes a lithium battery box and a plurality of battery packs arranged in the lithium battery box, the battery pack includes a plurality of battery clusters connected in parallel, and the battery cluster includes a plurality of battery packs 12,

[0042] The battery pack 12 includes at least two lithium battery modules 11, each battery cluster is connected to a high-voltage box 10; the domain control box 2 is connected to the lithium battery device, and the domain control box 2 serves as a fault information collection source and a fault processing execution unit; the control device 3 includes a slave control module 31, a master control module 32 and a master control module 33, which are respectively used for operation monitoring of the lithium battery module, the battery cluster and the battery group; the control device 3 cooperates with the management subsystem 4 to collect the operation status data of the lithium battery device, process the fault information, and send the alarm instruction;

[0043] The alarm device 5 is divided into two places, one is located on the side of the bow control console of the ship, and is provided with an alarm panel 51 and a control panel 52, and the other is set on the panel of the domain control box 2, and is provided with an alarm panel 21 and a control panel 22, which jointly realize fault alarm and execute fault processing result operation;

[0044] The load 6 includes a busbar assembly 61 and a load device 62 (daily load, propulsion load, etc.); the external device 7 is a ship power management system or an energy management system, which communicates with the control device 3 to exchange information; the operation failure of the lithium battery device in the battery compartment 1 is monitored by the control device 3, and the alarm device 5 and the alarm board 1 51, the alarm board 2 21 and the control board 1 52, the control board 2 22 of the domain control box 2 are warned and eliminated and restored to ensure the safe operation of the lithium battery device;

[0045] The master control module 33 and the confluence component 61 are arranged in the domain control box 2, and the confluence component 61 includes a circuit breaker, a fuse, and a power supply collection circuit; the high-voltage box 10 is provided with a master control module 32 and a main power supply circuit connecting the battery cluster and the load, and the main circuit is equipped with a Hall sensor, a fuse, a high-voltage relay, and a manual maintenance switch MSD; one end of the power supply collection circuit of the confluence component 61 is connected to the load device, and the other end is connected to the main power supply circuit from multiple high-voltage boxes 10 as a collection point, so as to provide the power of multiple battery clusters to the load; an NTC sensor is arranged on the lithium battery module 11, and a voltage divider is arranged on the slave control module 31 Detection circuit and integrated detection circuit AFE, NTC sensor combined with voltage-dividing detection circuit are used for charging and discharging monomer temperature, OTP monomer temperature collection and temperature and voltage disconnection detection, and integrated detection circuit AFE is used for multi-channel monomer voltage collection; the main control module 32 is provided with a main controller, detection circuit and communication interface, etc., and the Hall sensor on the main circuit and the detection circuit of the main control module 32 are used together for charging and discharging current collection of the lithium battery-powered main circuit; the main control module 33 is provided with a DI module and a DO module for input control signal detection to meet the requirements of thermal management, emergency exhaust, and abnormal action protection of relays / circuit breakers;

[0046] The management subsystem 4 includes a database 40, a data information acquisition module 41, a data preprocessing module 42, and a fault information processing module 43; the data information acquisition module 41 cooperates with the control device 3 to store the collected data and the data processed by the data preprocessing module 42 into the database 40, waiting for the fault information processing module 43 to process;

[0047] When the alarm system is working, the data information acquisition module 41 automatically executes the data acquisition thread, and periodically collects and stores the operating status parameters of the lithium battery device in the battery compartment 1 from the lithium battery module 11, the high-voltage box 10, the confluence component 61 and the domain control box 2 through the slave control module 31, the main control module 32 and the master control module 33 of the control device 3. The data preprocessing module 42 automatically performs data preprocessing according to the data processing thread, and uploads the results to the database 40. The fault information processing module 43 performs secondary processing, including fault information classification and fault processing instructions, which are sent to the alarm device 5 and execute corresponding alarm operations and safety protection;

[0048] The management subsystem 4 is provided with first-level, second-level and third-level warning functions, the first-level is early warning, the second-level is alarm, and the third-level is protection; each level of alarm function is provided with the same or different number of alarm items P according to the needs, the degree of impact or the degree of harm. i (i=1,2,…,n), or define different alarm levels for a certain alarm item according to the needs and the degree of damage caused by the fault; each level of alarm function corresponds to the corresponding alarm threshold, action delay, recovery condition, and corresponding execution action settings;

[0049] For each alarm item P i The fault status, evaluation parameters, and judgment criteria are set. When the management subsystem 4 collects and analyzes fault data, the alarm items P are set. i The attribute elements are classified and processed, and the processing results are classified according to the fault level and the result data is sent to the alarm device 5.

[0050] That is, among the three-level warning functions, the harm degree of the low level is small, and the harm degree of the high level is large. At the same time, the system processes them separately, including sound and light alarm, display of alarm information, prompting manual intervention adjustment (including reset, emergency stop), automatic power reduction and system shutdown. The system defines different processing methods corresponding to the corresponding threshold range;

[0051] Table 1 below shows the alarm fault points and their attribute element relationships of the present invention:

[0052]

[0053]

[0054] Table 1

[0055] After the alarm system is started, the lithium battery management subsystem (BMS) performs a system self-check. When the self-check is normal, the lithium battery device enters a normal operating state. At this time, the management subsystem 4, the data information acquisition module 41 enters a timed periodic cycle operation, and the data preprocessing module 42 performs data preprocessing. At the same time, the fault information processing module 43 performs secondary data processing, and compares the processing results with the alarm threshold and recovery conditions according to the three-level alarm function definition, and performs corresponding processing, including system or device action delay and alarm execution;

[0056] like Figure 3 As shown, the alarm device 5 includes a domain control box panel 510, an emergency stop button 1 521, an emergency stop button 2 522, a driving console panel 530, and a start-stop control panel 540; the domain control box panel 510 is provided with buttons and indicator lights, which are arranged in the battery compartment, and an emergency stop button 1 521 and an emergency stop button 2 522 are arranged on the left and right sides of the battery compartment, the driving console panel 530 and the start-stop control panel 540 are arranged on the driving console, and the start-stop control panel 540 is used for the start-stop control of the battery, and a knob is provided thereon for switching and selecting the battery pack;

[0057] When a battery alarm occurs, an audible and visual alarm is first given on the panel of the domain control box 2 in the local battery compartment 3. This alarm information is transmitted to the driver's console. The HMI of the driver's console displays the alarm information, and the driver's console is also equipped with an audible and visual alarm trigger; the emergency stop signal of the domain control box, the emergency stop outside the battery compartment, and the emergency stop signal of the driver's console are directly transmitted to the main controller in the domain control box 2. The main controller issues an emergency stop command to disconnect the high-voltage relay in the high-voltage box 10 and the circuit breaker of the bus assembly 61, and the battery cluster reduces the high voltage.

[0058] The control input function of the main control module 32 is used to detect the feedback signal after the DO output and the protection function of the detection system.

[0059] After the total negative relay is closed, detect whether the feedback contact of the total negative relay is closed to determine whether the logic is normal;

[0060] When detecting the manual maintenance switch MSD and emergency stop signal of the high-voltage box, an alarm is triggered immediately when the normally closed contact is disconnected during the normal operation of the system;

[0061] The input voltage detection is used to detect the working input voltage of the main control module 32, and an alarm will be immediately triggered if it exceeds the normal range;

[0062] Input voltage detection is performed using a timer + counter continuous comparison method. If the conditions are met for a period of time, an alarm is set to save RAM / FRAM resources.

[0063] The output controlled by the main control module 32 is to control the high-voltage relay to close successively during the charging and discharging process; and during the operation, when receiving the charging completion or stop charging and discharging instruction, or reaching other set conditions, the high-voltage relay is disconnected, such as generating a three-level alarm.

[0064] The master control module 33 stores various configured alarm thresholds and displays the real-time data, alarms, and system status of the current master control module 32;

[0065] The control input function of the master control module 33 is used to respond to and execute the operation instructions input from the outside, to select the local / remote operation mode of the battery pack, to receive the start and stop instructions to control the high voltage power-on and fault reset of the master control module 32; and to detect the protection function of the system. When the emergency stop button is pressed during the normal operation of the system, the normally closed contact is disconnected, which immediately triggers the master control module 33 to alarm and cut off the power output of the battery pack in an emergency;

[0066] The output controlled by the master control module 33 is to display the current operating status indicator light during the charging and discharging process, and to emit an audible and visual alarm when an alarm is generated.

[0067] like Figure 4 As shown, an alarm control method for a three-level alarm system of a marine lithium battery device comprises the following steps:

[0068] Step 1: Power on the lithium battery device;

[0069] Power on the lithium battery device, start the system and self-check. If the self-check result is normal, proceed to step 2. If the self-check result is abnormal, reset and restart the system and self-check until the self-check result is normal.

[0070] Step 2: Data signal acquisition periodic cycle operation

[0071] The management subsystem (BMS) 4 enters a timing cycle operation, that is, the data information acquisition module 41 collects data, the data preprocessing module 42 and the data processing module 43 respectively perform data preprocessing and related analysis and calculation, and regularly sends data to the lithium battery management subsystem BMS;

[0072] Step 3: Threshold comparison

[0073] Compare the alarm threshold and recovery conditions according to the three-level alarm function definition, and send instructions to the alarm device 5 to perform corresponding processing;

[0074] Step 4: Execute the alarm

[0075] After receiving the instruction, the alarm device 5 processes the instruction accordingly, including delaying the system or device action and executing the alarm;

[0076] Step 5: Repeat steps 2 to 4 until the system is powered off, ending the system operation.

[0077] 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. A three-level alarm system for a marine lithium battery device, comprising a battery compartment (1), a domain control box (2), a control device (3), a management subsystem (4), an alarm device (5), a load (6) and an external device (7); a lithium battery device is arranged inside the battery compartment (1) to provide lithium battery power for the load (6); the lithium battery device comprises a lithium battery box and a plurality of battery packs arranged in the lithium battery box, the battery pack comprises a plurality of battery clusters connected in parallel, the battery cluster comprises a plurality of battery packs (12), the battery pack (12) comprises at least two lithium battery modules (11), and each battery cluster is connected to a high-voltage box (10); the domain control box (2) is connected to the lithium battery device, and the domain control box (2) serves as a fault information collection source and a fault processing execution unit; Features: The control device (3) comprises a slave control module (31), a master control module (32) and a master control module (33), which are respectively used for operating monitoring of the lithium battery module, the battery cluster and the battery pack; the control device (3) cooperates with the management subsystem (4) to collect operating status data of the lithium battery device, process fault information and send alarm instructions; The lithium battery module (11) is provided with an NTC sensor, and the slave control module (31) is provided with a voltage division detection circuit and an integrated detection circuit AFE. The NTC sensor and the voltage division detection circuit are combined to collect the temperature of the charging and discharging monomers, the temperature of the OTP monomers, and the temperature and voltage disconnection detection. The integrated detection circuit AFE is used to collect the voltage of multiple monomers. The main circuit of the high-voltage box (10) is provided with a Hall sensor, and the main control module (32) is provided with a detection circuit. The Hall sensor and the detection circuit are used to collect the charging and discharging current of the main circuit of the high-voltage box. The master control module (33) is provided with a DI module and a DO module for inputting control signal detection to meet the requirements of thermal management, emergency exhaust, and abnormal operation protection of relays / circuit breakers. The management subsystem (4) comprises a database (40), a data information acquisition module (41), a data preprocessing module (42), and a fault information processing module (43); the data information acquisition module (41) cooperates with the control device (3) to store the collected data and the data processed by the data preprocessing module (42) into the database (40), waiting for the fault information processing module (43) to process; the management subsystem (4) is provided with first-level, second-level and third-level warning functions, the first level is early warning, the second level is alarm, and the third level is protection; each level of alarm function is provided with the same or different number of alarm items Pi, i=1,2,...,n according to the needs, the degree of influence or the degree of harm, or defines different alarm levels for a certain alarm item according to the needs and the degree of harm caused by the fault; The alarm device (5) is arranged at two locations, one of which is located at one side of the ship's bow control console and is provided with an alarm panel (51) and a control panel (52), and the other is arranged on the panel of the domain control box (2) and is provided with an alarm panel (21) and a control panel (22), which together realize fault alarm and execute fault processing result operation; The load (6) includes a busbar assembly (61) and a load device (62); the external device (7) is a ship power management system or an energy management system, which exchanges information with the control device (3) in a communication manner; an operating failure of the lithium battery device in the battery compartment (1) is monitored by the control device (3), and is warned and eliminated and restored by the alarm device (5) and the alarm board 1 (51), the alarm board 2 (21) and the control board 1 (52), the control board 2 (22) of the domain control box (2), so as to ensure the safe operation of the lithium battery device.

2. A three-level alarm system for a marine lithium battery device as claimed in claim 1, characterized in that: Each level of alarm function corresponds to the corresponding alarm threshold, action delay, recovery condition, and corresponding execution action setting.

3. A three-level alarm system for a marine lithium battery device as claimed in claim 2, characterized in that: For each of the alarm items P i The fault status, evaluation parameters and judgment criteria are set. When the management subsystem (4) collects and analyzes fault data, it will be based on the alarm items P set. i The attribute elements are classified and processed, and the processing results are classified according to the fault level and the result data is sent to the alarm device (5). At the same time, the system performs separate processing, including sound and light alarm, display of alarm information, prompting manual intervention adjustment, automatic power reduction of the system, and system shutdown. The system defines different processing methods corresponding to corresponding threshold ranges.

4. A three-level alarm system for a marine lithium battery device as claimed in claim 3, characterized in that: The control input function of the main control module (32) is used to detect the feedback signal after the DO output and the protection function of the detection system. After the main negative relay is closed, it is detected whether the feedback contact of the main negative relay is closed and then judge whether the logic is normal; when detecting the manual maintenance switch MSD of the high-voltage box and the emergency stop signal, when the normally closed contact is disconnected during the normal operation of the system, an alarm is immediately triggered; the input voltage detection is used to detect the working input voltage of the main control module (32), and an alarm is immediately triggered when it exceeds the normal range.

5. A three-level alarm system for a marine lithium battery device as claimed in claim 4, characterized in that: The input voltage detection is performed by continuous comparison between a timer and a counter, and an alarm is set when the condition is met for a period of time.

6. A three-level alarm system for a marine lithium battery device as claimed in claim 5, characterized in that: The output controlled by the main control module (32) is to control the high-voltage relay to close successively during the charging and discharging processes; and to disconnect the high-voltage relay during operation when a charging completion or charging and discharging stop instruction is received, or other set conditions are met.

7. A three-level alarm system for a marine lithium battery device as claimed in claim 6, characterized in that: The master control module (33) stores various configured alarm thresholds, displays the real-time data, alarms, and system status of the current master control module (32); the control input function of the master control module (33) is used to respond to and execute external input operation instructions, and is used to select the local / remote operation mode of the battery pack, receive start and stop instructions to control the high voltage power-on and fault reset of the master control module (32); and detect the protection function of the system. When the emergency stop button is pressed during the normal operation of the system, the normally closed contact is disconnected, which immediately triggers the master control module (33) to alarm and cut off the power output of the battery pack in an emergency; the output controlled by the master control module (33) is to display the current operation status indicator light during the charging and discharging process, and emit an audible and visual alarm when an alarm is generated.

8. An alarm control method for a three-level alarm system of a marine lithium battery device as claimed in claim 7, comprising the following steps: Step 1: Power on the lithium battery device; Power on the lithium battery device, start the system and self-check. If the self-check result is normal, proceed to step 2. If the self-check result is abnormal, reset and restart the system and self-check until the self-check result is normal. Step 2: Data signal acquisition periodic cycle operation The management subsystem (4) enters a timed loop operation, i.e., the data information acquisition module (41) collects data, the data preprocessing module (42) and the data processing module (43) respectively perform data preprocessing and related analysis and calculation, and sends the data to the lithium battery management system PMS at regular intervals; Step 3: Threshold comparison Compare the alarm threshold and recovery conditions according to the three-level alarm function definition, and send instructions to the alarm device (5); Step 4: Execute the alarm After receiving the instruction, the alarm device (5) processes the instruction accordingly, including delaying the action of the system or device and executing the alarm; Step 5: Repeat steps 2 to 4 until the system is powered off, ending system operation.

Images