Safety system for preventing combustible gas of electric ship from diffusing

Abstract

The utility model discloses a safety system for preventing combustible gas diffusion of an electric ship, a power battery of the ship is fixed in a battery box, a plurality of battery boxes are arranged and are all placed in a battery bin, a combustible gas detector is arranged in each battery box, and the combustible gas detector is used for detecting the combustible gas. A gas-collecting hood is arranged above each battery box in the battery bin, the gas-collecting hoods are connected with a combustible gas exhaust port outside the battery bin through air pipes, and an exhaust fan is arranged at the joint of each gas-collecting hood and the corresponding air pipe. According to the safety system, multiple measures are used for cooperative work, gas diffusion is controlled in time at the initial stage of gas leakage, and the risks of fire disasters and explosions caused by combustible gas leakage are effectively reduced. The technology is suitable for various places requiring monitoring and preventing combustible gas leakage, and has wide application prospect and market value.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of ship safety. BACKGROUND

[0002] The battery of the electric ship has the risk of combustible gas leakage, and if these gases are not handled in time after leakage, they may mix with air to form an explosive gas mixture, increasing the risk of fire and explosion. Therefore, how to effectively prevent the diffusion of combustible gas and reduce the safety hazards caused by gas leakage has become a problem to be solved.

[0003] The existing technical solutions mainly include gas leakage detectors, ventilation devices, and gas leakage alarm systems, etc. For example, the publication number is CN216083910U, the publication date is March 18, 2022, and the patent name is "Combustible gas monitoring system for pure electric ship". The publication discloses a system including an alarm controller, the power input end of the alarm controller is connected to the main power supply and the emergency power supply, the signal output end of the alarm controller is connected to the driver's cabin alarm lamp panel or the monitoring alarm system terminal, the input end of the alarm controller is connected to the gas transmitter, and the gas transmitter is provided with a plurality of groups, each group of gas transmitters is divided into combustible gas transmitters and hydrogen gas transmitters. The gas transmitter is in communication connection with the driver's cabin alarm lamp panel or the monitoring alarm system terminal through the RS485 interface; the utility model can monitor the concentration of combustible gas or hydrogen gas in the battery compartment in time, and when the concentration reaches a certain preset value, a pre-alarm or a main alarm is performed. However, these technologies usually only alarm or ventilate after gas leakage occurs, and do not effectively prevent potential dangers during gas diffusion.

[0004] Therefore, how to timely control the diffusion of combustible gas at the initial stage of leakage to prevent fire or explosion still remains a bottleneck for technological development. SUMMARY

[0005] The utility model solves the technical problem of realizing a more timely and accurate monitoring of combustible gas and a combustible gas safety system for battery ships with efficient protection function.

[0006] In order to achieve the above purpose, the utility model adopts the technical scheme of: a safety system for preventing the diffusion of combustible gas of an electric ship, the power battery of the ship is fixed in the battery box, the battery box is provided with a plurality of and is placed in the battery compartment, a combustible gas detector is arranged in each battery box, a gas collecting hood is arranged above each battery box in the battery compartment, the gas collecting hood is connected to the combustible gas exhaust port outside the battery compartment through the air pipe, and an exhaust fan is arranged at the connection part of each gas collecting hood and the air pipe.

[0007] The gas collecting cover is a horn-shaped structure with a large lower part and a small upper part, and the top of the battery box directly below the gas collecting cover is provided with a gas permeable hole.

[0008] The combustible gas exhaust port and the air pipe connecting part are both provided with an exhaust fan.

[0009] The battery compartment is provided with six battery boxes, the battery boxes are fixed on the bottom of the battery compartment in two rows, gaps are arranged between the battery boxes, and gaps are also arranged between the battery boxes and the bottom of the battery compartment.

[0010] The battery compartment is constructed by a battery compartment frame to form a rectangular frame, and each surface of the battery compartment frame is sealed by a sealing plate to form a sealed space.

[0011] The system is provided with a control system, the BMS of the power battery is connected to the control system through a CAN bus, each combustible gas detector is connected to the control system through a signal line, the control system is connected to a fan controller through a signal line, the fan controller is connected to and drives each fan, and the control system is connected to an audible and visual alarm through a signal line.

[0012] The audible and visual alarm and the control system are installed in the cockpit, and the control system is connected to an interactive device.

[0013] The safety system utilizes multiple measures to work cooperatively, timely controls gas diffusion in the initial stage of gas leakage, and effectively reduces the risk of fire and explosion caused by combustible gas leakage. BRIEF DESCRIPTION OF DRAWINGS

[0014] The content expressed by each drawing in the description of the utility model and the marks in the drawings are briefly described as follows:

[0015] Figure 1 、 2 It is a safety system head in different directions;

[0016] Figure 3 It is a safety system top view;

[0017] Figure 4 It is a safety system principle block diagram;

[0018] The marks in the above drawings are as follows: 1, battery compartment frame; 2, battery box; 3, gas collecting cover; 4, exhaust fan; 5, air pipe; 6, combustible gas exhaust port; 7, combustible gas detector. DETAILED DESCRIPTION

[0019] The specific embodiments of the present application will be further described below with reference to the drawings, and the shape, structure, mutual position and connection relationship between the parts, the function and working principle of each part, the manufacturing process and the operation and use method of each component involved in the specific embodiments of the present application will be further described in detail to help the skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical scheme of the present application.

[0020] The system fixes the power battery in the battery box 2, and multiple battery boxes 2 are arranged, for example Figure 1 、 2 , as shown in 3, six power battery boxes 2 are arranged, and all the battery boxes 2 are fixed in the battery compartment, the battery compartment is formed into a cuboid frame by the battery compartment frame 1, each surface of the battery compartment frame 1 is sealed by a sealing plate, and the whole structure is similar to a container. Through such a structure, the normal battery compartment can be conveniently concentrated, and the installation of the power battery of the electric ship is directly completed by the hoisting installation mode, which is overall convenient and fast, and the power battery compartment is a sealed structure, the surrounding sealing plate is made of fireproof plate material, which can avoid the spread of fire when the power battery has an accident, such as a fire accident, and ensure the safety of other cabins of the ship.

[0021] The six battery boxes 2 in the battery compartment are fixed in two rows at the bottom of the battery compartment, and gaps are provided between the battery boxes 2 during installation to provide sufficient heat dissipation space, and gaps are also provided between the battery boxes 2 and the bottom of the battery compartment to provide sufficient heat dissipation space at the bottom of the battery boxes 2. Because the ship will be jolted during driving, the connecting parts between the battery boxes 2 and the bottom of the battery compartment have a damping function to offset the driving jolt and reduce the safety performance decline of the battery caused by the jolt.

[0022] The system is provided with a combustible gas detector 7 in each battery box 2. The combustible gas detector monitors the gas leakage in real time and detects the gas concentration as the sensing element to trigger the alarm. Meanwhile, a gas collection hood 3 is provided above each battery box 2. The gas collection hood 3 has a horn-shaped structure with a large lower part and a small upper part. The lower opening of the gas collection hood 3 is slightly smaller than the area of the top of the battery box 2, and the top of the battery box 2 directly below the gas collection hood 3 is provided with a gas permeable hole. In this way, other channels for upward gas exhaust in the battery box 2 cooperate with the gas collection hood 3 and the heat dissipation holes provided at the bottom of the battery box 2 to enable the upward airflow in the battery box 2. The upward flow of flammable gas is absorbed by the gas collection hood 3 to avoid the accumulation of flammable gas. In order to ensure the effect of gas absorption, the lower eave of the gas collection hood 3 is about 5-20 cm away from the top of the battery box 2, which cannot be too high to reduce the influence of the exhaust fan 4. The gas collection hood 3 is connected to the combustible gas exhaust port 6 outside the battery compartment through the air pipe 5. The exhaust fan 4 is provided at the connection part of each gas collection hood 3 and the air pipe 5. The independent exhaust fan 4 can be started selectively to exhaust only the abnormal battery box 2. In addition, the exhaust fan 4 can also be provided at the connection part of the combustible gas exhaust port 6 and the air pipe 5 to further improve the suction force inside the air pipe 5 and improve the exhaust effect. The combustible gas exhaust port 6 extends upward above the top of the battery compartment. The top of the combustible gas exhaust port 6 is a bent pipe with the bent opening downward, which can avoid water entering the battery compartment installed in the open air due to the combustible gas exhaust port 6.

[0023] The three gas collection hoods 3 in the above system are connected together through pipes. The combustible gas is discharged to a safe area through the emergency exhaust port of the explosion-proof fan on the pipe to prevent the accumulation of combustible gas inside the battery compartment, which can cause the concentration of combustible gas to rise and cause risks. The system is provided with a control system. The control system can use an existing industrial computer, which is generally installed in the cockpit. At the same time, an interactive device connected to the control system can be installed in the cockpit to facilitate the monitoring and data debugging of the staff. The BMS of the power battery is connected to the control system through the CAN bus. The control system automatically monitors the BMS alarm information in real time and can monitor the health status of the battery.

[0024] The control system is connected to the fan controller through a signal line. The fan controller connects and drives each fan. Each combustible gas detector 7 is connected to the control system through a signal line. The control system monitors the gas leakage in real time through the combustible detector and detects the gas concentration, which can be displayed on the interactive device. The control system controls the air volume of the fan through the PID method according to the detected combustible gas concentration, which can be set to control the combustible gas concentration to be below 20% of the lower explosive limit (LEL). In this way, the concentration value can be controlled, and unnecessary energy consumption caused by the continuous start of the fan can be prevented. The control system can also be set to automatically start the fan when the fault information of the combustible gas leakage of the BMS of the battery box 2 is detected and remains for 5 seconds without disappearing.

[0025] The control system is connected with the sound-light alarm through a signal line. When the control system monitors that the preset alarm condition is reached, for example, after the control fan is started for 5 minutes, the detected combustible gas concentration does not decrease all the time and keeps rising at 1% / s while the combustible gas concentration reaches 100% of the lower explosive limit (LEL), the control system determines that there is a risk of combustible gas diffusion in the power battery cabin, the control system will automatically cut off all non-explosion-proof electrical equipment except the explosion-proof exhaust fan 4, and at the same time the control system will trigger the sound-light alarm to remind the relevant staff.

[0026] The application is described above in conjunction with the drawings, and it is obvious that the specific implementation of the application is not limited by the above method, as long as various non-essential improvements are made by using the method concept and technical solution of the application, or the concept and technical solution of the application is directly applied to other occasions without improvement, which are all within the protection scope of the application.

Claims

1. A safety system to prevent the diffusion of flammable gases in an electrically powered watercraft, characterized by: The power battery of the ship is fixed in the battery box, the battery box is provided with a plurality of battery boxes and is placed in the battery compartment, each battery box is provided with a combustible gas detector, the upper part of each battery box in the battery compartment is provided with a gas collecting hood, the gas collecting hood is connected with the combustible gas exhaust port outside the battery compartment through the air pipe, and each gas collecting hood is provided with an exhaust fan at the connection part of the air pipe.

2. A safety system to prevent the diffusion of flammable gases from an electrically powered marine vessel according to claim 1, characterized in that: The gas collecting hood is a horn-shaped structure with a large lower part and a small upper part, and the top of the battery box directly below the gas collecting hood is provided with a breathable hole.

3. A safety system to prevent the diffusion of flammable gases from an electrically powered marine vessel according to claim 2, characterized in that: The combustible gas exhaust port and the air pipe connection part are provided with an exhaust fan.

4. A safety system to prevent the diffusion of flammable gases from an electrically powered marine vessel according to claim 1, 2 or 3, characterized in that: The battery compartment is provided with six battery boxes, the battery boxes are fixed on the bottom of the battery compartment in two rows, gaps are arranged between the battery boxes, and gaps are also arranged between the battery boxes and the bottom of the battery compartment.

5. A safety system to prevent the diffusion of flammable gases from an electrically powered marine vessel according to claim 4, characterized in that: The battery compartment is constructed into a rectangular frame by a battery compartment frame, each surface of the battery compartment frame is sealed by a sealing plate, and the battery compartment is constructed into a sealed space.

6. A safety system to prevent the diffusion of flammable gases in an electrically propelled marine vessel according to claim 1 or 5, characterized in that: The system is provided with a control system, the BMS of the power battery is connected with the control system through a CAN bus, each combustible gas detector is connected with the control system through a signal line, the control system is connected with a fan controller through a signal line, the fan controller is connected with and drives each fan, and the control system is connected with an audible and visual alarm through a signal line.

7. A safety system to prevent the diffusion of flammable gases from an electrically powered marine vessel according to claim 6, characterized in that: The audible and visual alarm and the control system are installed in the cockpit, and the control system is connected with an interactive device.

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