Independent pool fire extinguishing system based on shipborne lithium battery box type energy storage device

Abstract

The invention discloses an independent pool fire extinguishing system based on a shipborne lithium battery box type energy storage device. According to the invention, the fire extinguishing pool and ancillary facilities of the box-type energy storage devices are additionally arranged, so that reliable fire extinguishing is ensured without affecting the adjacent box-type energy storage devices, even if one energy storage device of the ship is lost, other box-type energy storage devices can still be normally used, the supply of power and electric power of the ship is ensured, and the safe operation of the ship is ensured. And a dual mechanism of continuous temperature control and isolation protection is constructed aiming at the fire characteristic of the lithium battery. Each shipborne box type energy storage device is provided with an independent fire-fighting water pool, so that when a fire occurs in a certain unit, a fire-fighting water system of the ship can accurately inject a fire-fighting water source into the corresponding water pool, and a closed circulating cooling environment is formed. The physical isolation characteristic of the independent pools ensures that fire-fighting water only acts on a fire-catching unit, short circuit or soaking faults caused by water jet of adjacent energy storage devices and ship power equipment are avoided, and the completeness of ship power and a power supply system is reserved to the maximum extent.

Description

Technical Field

[0001] The present invention belongs to the technical field of lithium battery fire extinguishing, and specifically relates to an independent water tank fire extinguishing system based on a shipborne lithium battery box-type energy storage device. Background Art

[0002] Lithium-ion battery energy storage systems are mainly prefabricated warehouse energy storage systems represented by containers. Container lithium battery energy storage system is an energy storage system that uses lithium battery electrochemical reaction as energy conversion form. It generally includes monitoring equipment management system, battery management system, special emergency fire protection system, special container central air conditioner, energy storage battery isolation power converter and isolation transformer and other equipment encapsulated in the container. Container lithium battery energy storage system has a good application prospect in power energy storage system with its unique advantages such as high capacity, strong reliability, environmental protection, strong adaptability, high flexibility, convenient installation and maintenance. At present, the shipboard box energy storage system is formed by a single shipboard box energy storage device, or by connecting multiple single shipboard box devices in series and parallel. Its single shipboard energy storage device can independently power supply to form a shipboard box energy storage system, or multiple shipboard box energy storage devices can be connected in series to form a shipboard box energy storage system. The single box energy storage device can work independently or in series and parallel. In accordance with the requirements of the "Specifications for Battery Power Application in Ships", the shipboard box-type energy storage system has dual fire protection, that is, the fire detection and fire extinguishing system that comes with the ship's container-type energy storage. Once the system fails, the ship will use the water fire extinguishing system. The system layout should be able to provide at least 4 water columns of specified pressure and flow for the box-type power supply.

[0003] However, the continuous cooling capacity of the traditional method is not high enough. Once four fire-fighting water jets of specified pressure and flow are sprayed for cooling, the open fire may be extinguished, but under the continuous heat release of the internal heat generation of the lithium battery core, the battery unit will reignite and need to be extinguished again. As the lithium battery core continues to release heat, the battery unit will reignite, and the ship's water fire extinguishing system will be repeatedly turned on. When enough of the sprayed fire-fighting water remains on the hull, other equipment on the ship will be soaked and fail. Under the action of the free liquid surface, the stability of the ship will change, affecting the floating state of the ship. In extreme cases, it may cause the ship to capsize. At the same time, when the fire-fighting water is used to extinguish the open fire, it is bound to have an impact on the adjacent energy storage device. In the narrow space of the ship, the fire-fighting water may be sprayed onto the energy storage device where the fire has not occurred, causing the ship to lose power and electricity. Summary of the invention

[0004] The purpose of the present invention is to provide an independent water tank fire extinguishing system based on a shipborne lithium battery box-type energy storage device in order to solve the above-mentioned problems.

[0005] The technical solution adopted by the present invention is as follows: an independent pool fire extinguishing system based on a shipborne lithium battery box energy storage device, and the fire extinguishing system includes: a shipborne box energy storage device, a cut-off check valve (M1) for the interface of the ship's fire water extinguishing system, fire water pipes for each shipborne box energy storage device and supporting valves (M2, M3, M4, M5), which are configured according to the number of box energy storage devices, an independent pool (one independent pool is installed for each box energy storage device), a fire water discharge pipeline and its valves (M6, M7, M8, M9), a suction pump and its control box, a discharge overboard valve (M11), and a valve (M12) for connecting to the ship's sewage system;

[0006] The cut-off check valve (M1) for the interface of the ship's fire water extinguishing system is connected to the ship's main fire water system through a fire pipeline and serves as the total water inlet control of the system.

[0007] The fire water pipelines for each shipborne box energy storage device are respectively controlled by valves such as M2, M3, M4, and M5. Each valve corresponds to an independent energy storage device and is connected to its supporting independent pool through a pipeline to achieve independent control of water injection into each pool. Each independent pool is directly connected to the corresponding shipborne box energy storage device through a fire water pipe for cooling water transportation.

[0008] The fire water discharge pipeline is respectively connected to the drainage outlets of each independent pool through valves such as M6, M7, M8, and M9, and the rear end of the valve converges to the inlet of the suction pump.

[0009] The outlet of the suction pump is divided into two paths: one path directly discharges water out of the ship through the discharge overboard valve (M11); the other path leads the water into the ship's sewage system through the valve (M12) for connecting to the ship's sewage system.

[0010] The suction pump and its control box are responsible for coordinating the drainage operation, and the opening and closing of the corresponding valves and the operating state of the pump are controlled through the control box. The layout of all valves and pipelines is configured according to the number of energy storage devices to ensure the independent operation of each module.

[0011] In a preferred embodiment, the main water inlet control valve is directly docked with the main pipeline of the ship's main fire water system and serves as the total water inlet hub of the entire fire extinguishing system. The valve body adopts a dual-function design of cut-off and check, which not only controls the delivery path of fire water to each independent pool but also prevents the reverse backflow of water to the main system. After the valve, it is connected to the water injection branches corresponding to different energy storage devices through multiple branch pipelines.

[0012] In a preferred embodiment, the on-board containerized energy storage device is equipped with an independent welded or assembled steel water tank. The top of the tank body is connected to the fire water branch through a water injection pipe, and a drain outlet is provided at the bottom and connected to the drain collection pipeline. A water level monitoring device is installed inside the water tank, and the outside is wrapped with a heat insulation layer to delay heat dissipation. The volume of the tank body is designed according to the heat load characteristics of the energy storage device to ensure that the water storage capacity meets the continuous cooling requirements.

[0013] In a preferred embodiment, a series valve group is provided on the water injection branch of the independent water tank, including a manual gate valve and an electric regulating valve. The manual gate valve is used for physical isolation during system maintenance, and the electric regulating valve is triggered to open by the control box after receiving a fire alarm signal. Each branch valve group is bound to the corresponding energy storage device through coding identification to form a one-to-one water injection control logic.

[0014] In a preferred embodiment, the drain outlet at the bottom of the independent water tank is connected to the drain collection main pipe through a high-pressure resistant metal hose, and multiple isolation valves are provided on the main pipe to select the target water tank for drainage. The end of the collection main pipe is connected to a centrifugal suction pump, and the pump body is driven by an explosion-proof motor. A buffer tank and a pressure gauge are respectively provided at the inlet and outlet. When the suction pump starts, the water can be directed to the outside of the ship or the ship's sewage tank through the switching valve group.

[0015] In a preferred embodiment, a two-way shunt device is provided at the outlet of the suction pump. One way is connected to the side drain outlet through a vertical rising pipeline, and the other way extends horizontally to the interface of the ship's sewage system. Butterfly valves with position feedback signals are respectively installed on the two pipelines, and the valve body state is automatically switched by the control box according to the ship's attitude, displacement and environmental protection requirements to ensure the optimal selection of the drainage path.

[0016] In a preferred embodiment, the operation method of the system is as follows:

[0017] S1. Open valves M1 and M3, and inject ship fire water into the water tank of the 2# energy storage device. After reaching the appropriate water level, close valves M1 and M3. The fire water in the water tank is used for cooling the energy storage device.

[0018] S2. Closely monitor the temperature and water volume of the water tank. When the lithium battery cores inside the energy storage device release too much energy and cause the water volume in the water tank to evaporate, water should be replenished in time to maintain effective cooling.

[0019] S3. Until the energy of the lithium battery cores inside the energy storage device is completely released and cooled by the water tank, open valves M7, M10, and M11, start the suction pump, and drain the fire water in the water tank to the outside of the ship; or open valves M7, M10, and M12, start the suction pump, and drain the fire water in the water tank to the ship's sewage system.

[0020] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are:

[0021] 1. In the present invention, on the basis of the original ship water fire extinguishing system of the ship, a fire extinguishing water tank and auxiliary facilities of a box-type energy storage device are added. While ensuring reliable fire extinguishing, it does not affect the adjacent box-type energy storage devices. Even if one energy storage device is lost on the ship, the other box-type energy storage devices can still be used normally, ensuring the power and electricity supply of the ship and ensuring the safe operation of the ship. A dual mechanism of continuous temperature control and isolation protection is constructed according to the characteristics of lithium battery fires. By configuring an independent fire fighting water tank for each on-board box-type energy storage device, when a fire occurs in a certain unit, the ship's fire fighting water system can accurately inject the fire extinguishing water source into the corresponding water tank to form a closed-loop cooling environment. The water storage capacity of the water tank is customized according to the heat load of the energy storage device, which can not only quickly absorb the residual heat after the open fire is extinguished, but also offset the internal heat release effect of the lithium battery cells by continuous water replenishment, completely blocking the conditions for reignition. At the same time, the physical isolation characteristics of the independent water tank ensure that the fire fighting water only acts on the unit on fire, avoiding short circuits or immersion failures caused by water jets to adjacent energy storage devices and ship electrical equipment, and maximizing the integrity of the ship's power and power supply systems.

[0022] 2. In the present invention, the independent water tank centrally stores the fire fighting water in a fixed container, and cooperates with the directional drainage pipeline to quickly drain the used water body to the outside of the ship or the sewage system, effectively eliminating the hidden danger of free liquid surface. This system relies on the transformation of the existing ship fire fighting facilities and realizes the low-cost upgrade of fire prevention and control through modular design. It not only meets the dual protection requirements for energy storage devices, but also avoids the damage to the hull structure caused by large-scale transformation. In extreme fire scenarios, this system can ensure that at least one energy storage unit maintains normal power supply, winning critical self-rescue time for the ship and significantly reducing the out-of-control risk caused by the loss of power of the whole ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the structural schematic diagram of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] Embodiment:

[0026] Refer to Figure 1, an independent water pool fire extinguishing system based on a shipborne lithium battery box energy storage device. The fire extinguishing system includes: a shipborne box energy storage device, a cut-off check valve (M1) for the interface of the ship's fire water extinguishing system, fire water pipes leading to each shipborne box energy storage device and supporting valves (M2, M3, M4, M5) (configured according to the number of box energy storage devices), independent water pools (one independent water pool is installed for each box energy storage device), a fire water discharge pipeline and its valves (M6, M7, M8, M9), a suction pump and its control box, a discharge overboard valve (M11), and a valve (M12) connecting to the ship's sewage system;

[0027] The cut-off check valve (M1) for the interface of the ship's fire water extinguishing system is connected to the ship's main fire water system through a fire pipeline, serving as the total water inlet control for the system.

[0028] The fire water pipelines leading to each shipborne box energy storage device are respectively controlled by valves such as M2, M3, M4, and M5. Each valve corresponds to an independent energy storage device and is connected to its supporting independent water pool through a pipeline to achieve independent control of water injection into each pool. Each independent water pool is directly connected to the corresponding shipborne box energy storage device through a fire water pipe for cooling water transportation.

[0029] The fire water discharge pipeline is respectively connected to the drainage outlets of each independent water pool through valves such as M6, M7, M8, and M9, and the back ends of the valves are aggregated to the inlet of the suction pump.

[0030] The outlet of the suction pump is divided into two paths: one path directly discharges water out of the ship through the discharge overboard valve (M11); the other path leads water into the ship's sewage system through the valve (M12) connecting to the ship's sewage system.

[0031] The suction pump and its control box are responsible for coordinating the drainage operation, and the opening and closing of the corresponding valves and the operating state of the pump are controlled through the control box. The layout of all valves and pipelines is configured according to the number of energy storage devices to ensure the independent operation of each module.

[0032] The main inlet control valve is directly connected to the main pipeline of the ship's main fire water system, serving as the total water inlet hub of the entire fire extinguishing system. The valve body is designed with dual functions of cut-off and check, which not only controls the delivery path of fire water to each independent water pool but also prevents the reverse backflow of water to the main system. After the valve, it is connected to the water injection branches corresponding to different energy storage devices through multi-branch pipelines.

[0033] Each shipborne box energy storage device is equipped with an independent welded or assembled steel water pool. The top of the pool body is connected to the fire water branch through a water injection pipe, and the bottom is provided with a drainage outlet and connected to the drainage aggregation pipeline. A water level monitoring device is installed inside the pool, and the outside is wrapped with a heat insulation layer to delay heat dissipation. The volume of the pool body is designed according to the heat load characteristics of the energy storage device to ensure that the water storage capacity meets the continuous cooling requirements.

[0034] A series-connected valve group is set on the water injection branch of the independent water tank, which includes a manual gate valve and an electric control valve. The manual gate valve is used for physical isolation during system maintenance, and the electric control valve is triggered to open by the control box after receiving a fire alarm signal. Each branch valve group is bound to the corresponding energy storage device through coding identification to form a one-to-one water injection control logic.

[0035] The drain outlet at the bottom of the independent water tank is connected to the drain main pipe through a high-pressure-resistant metal hose. Multiple isolation valves are set on the main pipe to select the target water tank for drainage. The end of the main pipe is connected to a centrifugal suction pump, and the pump body is driven by an explosion-proof motor. A buffer tank and a pressure gauge are respectively set at the inlet and outlet. When the suction pump starts, the water can be directed to be discharged outside the ship or into the ship's sewage tank through the switching valve group.

[0036] A two-way flow splitting device is set at the outlet of the suction pump. One way is connected to the side drain outlet through a vertical rising pipeline, and the other way extends horizontally to the interface of the ship's sewage system. Butterfly valves with position feedback signals are respectively installed on the two pipelines, and the valve body state is automatically switched by the control box according to the ship's attitude, displacement and environmental protection requirements to ensure the optimal selection of the drainage path.

[0037] The operation method of the system is as follows:

[0038] S1. Open valves M1 and M3, and inject ship fire-fighting water into the water tank of the 2# energy storage device. After reaching an appropriate water level, close valves M1 and M3. The fire-fighting water in the water tank is used for cooling the energy storage device.

[0039] S2. Closely monitor the water temperature and water volume in the water tank. When the lithium battery core inside the energy storage device releases too much energy and causes the water volume in the water tank to evaporate, water should be replenished in time to maintain effective cooling.

[0040] S3. Until the energy of the lithium battery core inside the energy storage device is completely released and cooled by the water tank, open valves M7, M10, and M11, start the suction pump, and discharge the fire-fighting water in the water tank to the outside of the ship; or open valves M7, M10, and M12, start the suction pump, and discharge the fire-fighting water in the water tank to the ship's sewage system.

[0041] In the present invention, on the basis of the original ship water fire extinguishing system, a fire extinguishing pool and ancillary facilities of a box-type energy storage device are added, which ensures reliable fire extinguishing while not affecting adjacent box-type energy storage devices. Even if a ship loses an energy storage device, other box-type energy storage devices can still be used normally, ensuring the supply of ship power and electricity, and ensuring the safe operation of the ship. A dual mechanism of continuous temperature control and isolation protection is constructed for the characteristics of lithium battery fires. By configuring an independent fire water pool for each ship-borne box-type energy storage device, when a fire occurs in a unit, the ship fire water system can accurately inject the fire extinguishing water source into the corresponding pool to form a closed circulation cooling environment. The water storage capacity of the pool is customized according to the heat load of the energy storage device, which can not only quickly absorb the residual heat after the open fire is extinguished, but also offset the internal heat release effect of the lithium battery cell by continuous water replenishment, and completely block the re-ignition conditions. At the same time, the physical isolation characteristics of the independent pool ensure that the fire water only acts on the fire unit, avoiding short circuit or immersion failure of adjacent energy storage devices and ship power equipment due to water jets, and retaining the integrity of the ship power and power supply system to the maximum extent.

[0042] In the present invention, an independent water tank stores fire water in a fixed container, and cooperates with a directional drainage pipeline to quickly discharge the used water to the overboard or sewage system, effectively eliminating the hidden dangers of the free liquid surface. The system relies on the transformation of existing ship fire-fighting facilities and realizes low-cost fire prevention and control upgrades through modular design. It not only meets the dual protection requirements for energy storage devices, but also avoids damage to the hull structure caused by large-scale transformation. In extreme fire scenarios, the system can ensure that at least one energy storage unit maintains normal power supply, buys critical self-rescue time for the ship, and significantly reduces the risk of loss of control caused by power failure of the entire ship.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An independent water tank fire extinguishing system based on a shipborne lithium battery box energy storage device, characterized by: The fire extinguishing system comprises: a shipboard box-type energy storage device, a stop check valve (M1) for the interface of a ship fire water extinguishing system, a fire water pipe for entering each shipboard box-type energy storage device and a matching valve (M2, M3, M4, M5), depending on the number of box-type energy storage devices, an independent water tank, a fire water discharge pipeline and valves (M6, M7, M8, M9), a suction pump and a control box thereof, an overboard valve (M11) and a valve (M12) for connecting to the ship sewage system; The ship fire water extinguishing system interface stop check valve (M1) is connected to the ship's main fire water system through a fire pipeline, serving as the system's water inlet master control; The fire water pipes entering each ship-borne box-type energy storage device are controlled by valves such as M2, M3, M4, and M5 respectively. Each valve corresponds to an independent energy storage device and is connected to its matching independent water tank through a pipeline to achieve independent control of water injection into each water tank; each independent water tank is directly connected to the corresponding ship-borne box-type energy storage device through a fire water pipe for cooling water delivery; The fire water discharge pipeline is connected to the drain outlet of each independent water tank through valves such as M6, M7, M8, and M9, and the rear end of the valve is connected to the inlet of the suction pump; The suction pump outlet is divided into two paths: one path discharges water directly out of the ship through an overboard valve (M11); the other path is connected to the ship sewage system valve (M12) to introduce water into the ship sewage system; The suction pump and its control box are responsible for coordinating the drainage operation, opening and closing the corresponding valves and the operating status of the pump through the control box; the layout of all valves and pipelines is configured according to the number of energy storage devices to ensure the independent operation of each module.

2. The independent water tank fire extinguishing system based on the shipborne lithium battery box-type energy storage device as claimed in claim 1 is characterized in that: The main water inlet control valve is directly connected to the main pipe of the ship's main fire water system, serving as the main water inlet hub of the entire fire extinguishing system; the valve body is a double stop and check valve, which not only controls the delivery path of fire water to each independent water tank, but also prevents water from flowing back into the main system.

3. The independent water tank fire extinguishing system based on the shipborne lithium battery box type energy storage device as claimed in claim 1 is characterized in that: The ship-borne box-type energy storage device is equipped with an independent welded or assembled steel water tank. The top of the tank is connected to the fire water branch through a water injection pipe, and a drain outlet is provided at the bottom and connected to the drainage collection pipeline. A water level monitoring device is installed inside the water tank, and an insulation layer is wrapped on the outside to delay heat loss. The volume of the tank is designed to match the thermal load characteristics of the energy storage device to ensure that the water storage capacity meets the continuous cooling requirements.

4. The independent water tank fire extinguishing system based on the shipborne lithium battery box type energy storage device as claimed in claim 1 is characterized in that: A series valve group is arranged on the water injection branch of the independent water tank, including a manual gate valve and an electric regulating valve; the manual gate valve is used for physical isolation during system maintenance, and the electric regulating valve is triggered to open by the control box after receiving the fire alarm signal; each branch valve group is bound to the corresponding energy storage device through a coding identification.

5. The independent water tank fire extinguishing system based on the shipborne lithium battery box type energy storage device as claimed in claim 1 is characterized in that: The drain outlet at the bottom of the independent water pool is connected to the drainage main pipe through a high-pressure resistant metal hose. A plurality of isolation valves are arranged on the main pipe for selecting the target water pool for drainage. The end of the main pipe is connected to a centrifugal suction pump. The pump body is driven by an explosion-proof motor. A buffer tank and a pressure gauge are arranged at the inlet and outlet respectively. When the suction pump is started, water can be directed to the overboard or the sewage tank of the ship by switching the valve group.

6. The independent water tank fire extinguishing system based on the shipborne lithium battery box type energy storage device as claimed in claim 1 is characterized in that: A dual-path diversion device is provided at the outlet of the suction pump, one of which is connected to the side drain outlet through a vertical rising pipeline, and the other extends horizontally to the interface of the ship's sewage system; butterfly valves with position feedback signals are respectively installed on the two pipelines, and the valve body status is automatically switched by the control box according to the ship's posture, displacement and environmental protection requirements.

7. The independent water tank fire extinguishing system based on the shipborne lithium battery box type energy storage device as claimed in claim 1 is characterized in that: The system operates as follows: S1. Open valves M1 and M3, and inject ship fire water into the 2# energy storage device water tank. When the water level reaches the appropriate level, close valves M1 and M3. The fire water in the water tank is used to cool the energy storage device. S2. Pay close attention to the temperature and water volume of the pool. When the lithium battery core inside the energy storage device releases too much energy and causes the water in the pool to evaporate, water should be added in time to maintain effective cooling; S3. After the energy of the lithium battery core inside the energy storage device is completely released and cooled by the water tank, open the M7, M10, and M11 valves, start the suction pump, and discharge the fire water from the water tank to the overboard; or open the M7, M10, and M12 valves, start the suction pump, and discharge the fire water from the water tank to the ship's sewage system.

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