Ship power battery pack with fire-fighting function

Abstract

The application relates to the technical field of ship power batteries, and discloses a ship power battery pack with a fire-fighting function, which comprises a support, the inside of the support is fixed with a battery pack, a water cooling assembly is arranged on the outside of the support, the water cooling assembly comprises a water tank, the lower surface of the water tank is fixed on the inner bottom of the support, a conveying pump is fixed on the outer wall of the water tank, a water suction pipe is fixed on the input end of the conveying pump, the end of the water suction pipe is arranged in the water tank, a shunt pipe I is fixed on the output end of the conveying pump, a plurality of water cooling pipes are arranged through the outside of the shunt pipe I, the outside of the water cooling pipes is attached to the outer wall of the battery pack, a shunt pipe II is fixed on the end of the water cooling pipes, and a fire-fighting assembly is arranged on the water tank and used for fire extinguishing treatment when a fire occurs, so that the daily cooling water source and the emergency fire-fighting water source are combined into one, the functions of quick response and fire extinguishing are realized.

Description

Technical Field

[0001] This invention relates to the field of marine power battery technology, specifically to a marine power battery pack with fire-fighting function. Background Technology

[0002] Marine power battery packs, as the core energy device for modern marine electrification, are increasingly widely used. Their high energy density, while providing long-lasting power, also brings severe safety challenges, with fire risk being particularly prominent. In the event of thermal runaway, fire can spread rapidly within the enclosed battery compartment, easily generating toxic gases and triggering explosions, posing a fatal threat to the ship and its personnel. Therefore, how to construct an integrated safety system that can meet the heat dissipation requirements of daily operation while also providing rapid, effective, and intelligent response in extreme situations such as fires is a critical technological bottleneck that urgently needs to be overcome in the design of marine power battery packs.

[0003] Fire suppression systems and cooling systems are typically considered two completely separate design areas. Routine water cooling systems focus on low-pressure circulation, with the sole purpose of removing operational heat. Fire suppression systems, on the other hand, are independent high-pressure emergency devices. This design approach directly leads to structural redundancy, requiring two separate water sources, piping, and pump sets. This not only encroaches on precious ship space but, more importantly, creates a long response chain from fire detection to activation of the independent fire suppression system. Delays in any link could result in missing the optimal time for fire suppression.

[0004] The role of air-cooled components in a fire is contradictory. Their original design purpose is efficient heat dissipation. However, when a fire breaks out inside the battery pack, the continuously operating fan becomes a deadly accomplice. It constantly supplies fresh air to the fire source, essentially adding fuel to the fire. At the same time, the airflow generated by the fan rapidly disperses the highly toxic fumes (such as hydrogen fluoride) produced by the combustion, contaminating the entire battery compartment and potentially pushing them into other compartments, causing the fire to escalate and resulting in secondary damage. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a marine power battery pack with fire-fighting capabilities, solving the problems of independent fire-fighting and cooling systems in existing technologies, which lead to structural redundancy and slow emergency response.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a marine power battery pack with fire-fighting function, comprising: A bracket, the battery pack of which is fixed inside the bracket; A water-cooled assembly, with its support structure on the outside, includes a water tank. The lower surface of the water tank is fixed to the inner bottom of the support structure. A delivery pump is fixed to the outer wall of the water tank. A water pumping pipe is fixed to the input end of the delivery pump, and the end of the water pumping pipe is located inside the water tank. A first branch pipe is fixed to the output end of the delivery pump. Multiple water-cooling pipes pass through the outer side of the first branch pipe. The outer side of the water-cooling pipes is attached to the outer wall of the battery pack. A second branch pipe is fixed to the end of the water-cooling pipes. A circulation pump is fixed to the other side of the water tank. The input end of the circulation pump is connected to the second branch pipe. A return pipe is fixed to the output end of the circulation pump, and the end of the return pipe is fixed inside the water tank. The air-cooled component, located at the top of the bracket, assists the water-cooled component in accelerating heat dissipation from the battery. Firefighting components, which are installed on the water tank, are used to extinguish fires in the event of a fire. An adjustment component, which is located on the air-cooling component, is used to adjust the function of the air-cooling component; An auxiliary cooling component, installed on the water-cooling pipe, is used to further cool the cooling water inside the water-cooling pipe.

[0007] Preferably, the fire-fighting component includes a water pump, the input end of which is connected to a water tank, the output end of which is fixed with a hose, and the end of which is fixed with a high-pressure nozzle.

[0008] Preferably, a fixing block is fixed to the outer wall of the hose, the outer wall of the fixing block is fixed to the outer wall of the water tank, and a placement rack is provided on the outer wall of the high-pressure nozzle, the outer wall of the placement rack is fixed to the outer wall of the water tank.

[0009] Preferably, the air-cooled assembly includes a housing, a dustproof net is fixed to the top of the housing, a fixing plate is fixed inside the housing, a fan is fixed inside the fixing plate, and multiple guide plates are fixed to the inner wall of the housing, with the guide plates positioned below the fan.

[0010] Preferably, a plurality of cooling fins are penetrated through the outer wall of the outer casing, the cooling surface of the cooling fins is disposed inside the outer casing, a plurality of heat sinks are fixed to the outer wall of each cooling fin, a connecting rod is fixed to the outer wall of the outer casing, a collection cover is fixed to the outer wall of the connecting rod, the outer wall of the collection cover is disposed outside the heat sinks, an air pump is fixed to the outer wall of the outer casing, an air extraction pipe is fixed to the input end of the air pump, the end of the air extraction pipe is connected to the collection cover, and an exhaust pipe is fixed to the output end of the air pump.

[0011] Preferably, the adjusting assembly includes a thin branch tube, one end of which is fixed inside the flexible tube, and the other end of which is fixed to a piston cylinder. A piston rod slides inside the piston cylinder, and a fixing rod is fixed inside the piston cylinder. One end of a spring is fixed to the outer wall of the fixing rod, and the other end of the spring is fixed to the piston of the piston rod. A rack is fixed to the outer wall of the piston rod.

[0012] Preferably, the housing has multiple rotating rods inside, the outer wall of each rotating rod is fixed with adjusting fins, and the end of each rotating rod is located on the outer side of the housing and is also fixed with a gear, which meshes with a rack.

[0013] Preferably, an exhaust pipe extends through the outer side of the outer casing, and an electromagnetic valve is installed inside the exhaust pipe.

[0014] Preferably, the auxiliary cooling assembly includes a symmetrical cooling box, the outer wall of the cooling box is fixed to both sides of the water cooling pipe, a second cooling plate passes through the outer side of the cooling box, the cooling surface of the second cooling plate is disposed inside the cooling box, a plurality of second heat dissipation fins are fixed on the heat dissipation surface of the second cooling plate, and an exhaust fan is fixed on the outer wall of the second heat dissipation fin.

[0015] Preferably, an inlet pipe runs through the upper end of the outer wall of the water tank, and an outlet pipe runs through the lower end of the outer wall of the water tank. Valves are installed inside both the inlet and outlet pipes.

[0016] This invention provides a marine power battery pack with fire-fighting capabilities. It offers the following advantages: 1. This invention achieves the integration of daily cooling water source and emergency fire-fighting water source through the cooperation between water-cooling components and fire-fighting components, realizing the functions of rapid response and fire extinguishing. It solves the problems of traditional fire-fighting systems requiring independent water sources, resulting in structural redundancy, occupation of valuable cabin space, and long emergency response chains.

[0017] 2. This invention, through the cooperation between the air-cooling component and the regulating component, utilizes the high-pressure water flow during fire start-up as power to automatically switch the function of the air-cooling system from internal cooling to external smoke exhaust, forming a coordinated operation of fire extinguishing and smoke exhaust. This solves the problem that if the air-cooling fan continues to run when the battery pack is on fire, it may disperse the flames and fuel the fire.

[0018] 3. This invention achieves efficient deep cooling of the battery pack through the cooperation of water-cooling and air-cooling components. At the same time, air cooling is used to assist in heat dissipation and temperature equalization of the internal environment and electronic components of the battery pack. This forms a three-dimensional, high-efficiency temperature control effect that combines core cooling and environmental heat dissipation. It solves the problem of insufficient heat dissipation capacity or excessive energy consumption of single cooling methods under complex ship operating conditions (such as high power impact, high temperature and high humidity environment). It ensures that the battery can maintain the optimal operating temperature range under various loads and extends its service life. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the battery pack structure of the present invention; Figure 3 This is a schematic diagram of the water tank section of the present invention; Figure 4 This is a schematic diagram of the water pump part of the present invention; Figure 5 This is a schematic diagram of the exhaust pipe structure of the present invention; Figure 6 This is a schematic diagram of the internal structure of the outer shell of the present invention; Figure 7 This is a schematic diagram of the internal structure of the piston cylinder of the present invention; Figure 8 This is a schematic diagram of the cooling box structure of the present invention.

[0020] The components include: 1. Bracket; 2. Battery pack; 3. Water-cooled assembly; 301. Water tank; 302. Transfer pump; 303. Pumping pipe; 304. Diverter pipe one; 305. Water-cooled pipe; 306. Diverter pipe two; 307. Circulation pump; 308. Return pipe; 4. Air-cooled assembly; 401. Outer shell; 402. Dustproof net; 403. Fixing plate; 404. Fan; 405. Guide plate; 406. Cooling chip one; 407. Heat sink one; 408. Collection cover; 409. Connecting rod; 410. Air pump; 411. Extraction pipe; 412. Exhaust pipe; 5. Firefighting assembly. Components; 501, Water pump; 502, Hose; 503, Fixing block; 504, High-pressure nozzle; 505, Placement rack; 6, Adjustment assembly; 601, Thin branch pipe; 602, Piston cylinder; 603, Piston rod; 604, Rack; 605, Fixing rod; 606, Spring; 607, Rotating rod; 608, Gear; 609, Adjusting fins; 7, Auxiliary refrigeration assembly; 701, Cooling box; 702, Refrigeration plate II; 703, Heat sink II; 704, Exhaust fan; 8, Inlet pipe; 9, Outlet pipe; 10, Valve; 11, Smoke exhaust pipe; 12, Solenoid valve. Detailed Implementation

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see the appendix Figure 1 -Appendix Figure 3 This invention provides a marine power battery pack with fire-fighting function, comprising: The bracket 1 has a battery pack 2 fixed inside it; The water-cooling assembly 3, located on the outside of the support 1, includes a water tank 301. The lower surface of the water tank 301 is fixed to the inner bottom of the support 1. A delivery pump 302 is fixed to the outer wall of the water tank 301. A water pump pipe 303 is fixed to the input end of the delivery pump 302. The end of the water pump pipe 303 is located inside the water tank 301. A first diversion pipe 304 is fixed to the output end of the delivery pump 302. Multiple water-cooling pipes 305 pass through the outer side of the first diversion pipe 304. The outer side of the water-cooling pipes 305 is attached to the outer wall of the battery pack 2. A second diversion pipe 306 is fixed to the end of the water-cooling pipes 305. A circulation pump 307 is fixed to the other side of the water tank 301. The input end of the circulation pump 307 is connected to the second diversion pipe 306. A return pipe 308 is fixed to the output end of the circulation pump 307. The end of the return pipe 308 is fixed inside the water tank 301. The air-cooled component 4 is located at the top of the bracket 1 and is used to assist the water-cooled component 3 in accelerating the heat dissipation of the battery. Firefighting component 5, which is installed on water tank 301, is used to extinguish fires in the event of a fire. Adjustment component 6, which is mounted on air-cooling component 4, is used to adjust the function of air-cooling component 4; The auxiliary cooling component 7 is installed on the water cooling pipe 305 and is used to perform secondary cooling treatment on the cooling water inside the water cooling pipe 305.

[0023] The fire-fighting component 5 includes a water pump 501, the input end of which is connected to a water tank 301, and a hose 502 fixed to the output end of the water pump 501. A high-pressure nozzle 504 is fixed to the end of the hose 502.

[0024] A fixing block 503 is fixed to the outer wall of the hose 502. The outer wall of the fixing block 503 is fixed to the outer wall of the water tank 301. A placement rack 505 is provided on the outer wall of the high-pressure nozzle 504. The outer wall of the placement rack 505 is fixed to the outer wall of the water tank 301.

[0025] Specifically, during operation, the water-cooling component 3 utilizes the delivery pump 302 and the circulation pump 307 to establish a continuous and stable low-pressure circulation. This allows the cooling medium in the water tank 301 to carry away the core heat generated by the battery pack 2 under high-load conditions through the pumping pipe 303, the first branch pipe 304, and the water-cooling pipe 305. The circulation is completed through the second branch pipe 306 and the return pipe 308. This not only maintains the optimal operating temperature of the battery pack 2 but also brings unexpected benefits: it keeps the water in the water tank 301, which serves as a fire water source, in a constant state of flow, avoiding the risks of sedimentation and deterioration that may occur in traditional independent fire water tanks 301, and ensuring the absolute cleanliness and reliability of the emergency water source. More importantly, because this water participates in heat exchange, its own temperature is effectively controlled. Once a fire occurs, the dedicated high-pressure water pump 501 of the fire-fighting component 5 will start, spraying this pre-cooled water towards the fire source through the hose 502 and the high-pressure nozzle 504. Its heat absorption efficiency is much higher than that of room temperature water, inhibiting the spread of heat.

[0026] Please see the appendix Figure 4 -Appendix Figure 7 The air-cooled assembly 4 includes a housing 401, a dustproof net 402 fixed to the top of the housing 401, a fixing plate 403 fixed inside the housing 401, a fan 404 fixed inside the fixing plate 403, multiple guide plates 405 fixed to the inner wall of the housing 401, the guide plates 405 being positioned below the fan 404, multiple cooling fins 406 penetrating the outer wall of the housing 401, the cooling surfaces of the cooling fins 406 being positioned inside the housing 401, multiple heat sinks 407 fixed to the outer wall of each cooling fin 406, a connecting rod 409 fixed to the outer wall of the housing 401, a collection cover 408 fixed to the outer wall of the connecting rod 409, the outer wall of the collection cover 408 being positioned outside the heat sinks 407, an air pump 410 fixed to the outer wall of the housing 401, an air extraction pipe 411 fixed to the input end of the air pump 410, the end of the air extraction pipe 411 being connected to the collection cover 408, and the air pump 410 being fixed to the input end of the air pump 410. The output end of pump 410 is fixed with an exhaust pipe 412. The regulating component 6 includes a thin branch pipe 601. One end of the thin branch pipe 601 is fixed inside the hose 502. The other end of the thin branch pipe 601 is fixed with a piston cylinder 602. A piston rod 603 slides inside the piston cylinder 602. A fixing rod 605 is fixed inside the piston cylinder 602. One end of a spring 606 is fixed to the outer wall of the fixing rod 605. The other end of the spring 606 is fixed to the piston of the piston rod 603. A rack 604 is fixed to the outer wall of the piston rod 603. Multiple rotating rods 607 rotate inside the outer casing 401. Adjusting fins 609 are fixed to the outer wall of the rotating rods 607. The ends of the rotating rods 607 are located on the outside of the outer casing 401 and a gear 608 is fixed thereon. The gear 608 and the rack 604 mesh with each other. An exhaust pipe 11 passes through the outside of the outer casing 401. A solenoid valve 12 is installed inside the exhaust pipe 11.

[0027] Specifically, during daily operation, it's not just simple ventilation and heat dissipation. The air drawn in by the fan 404 first flows through the deep cooling zone constructed by the cooling plate 406, generating a cold airflow with a temperature much lower than the ambient environment. This airflow is then precisely guided to the upper part of the battery pack 2 by the guide plate 405 and the initial adjusting fins 609, achieving active and highly efficient environmental cooling. The energy efficiency of this process is ensured by an independent waste heat removal system. The waste heat generated by the cooling plate 406 is collected by the heat sink 407, then gathered by the collection cover 408 and the connecting rod 409, and finally forcefully extracted by the air pump 410 through the extraction pipe 411 and discharged through the exhaust pipe 412, thus achieving cooling and waste heat removal. Complete isolation; the ingenuity of this design lies in its instantaneous transformation in the face of fire. Once the fire is activated, a stream of high-pressure water flows through the thin branch pipe 601 into the piston cylinder 602, driving the piston rod 603 and rack 604. This purely mechanical force, through the gear 608 and rotating rod 607, flips the adjusting fins 609 to the preset smoke exhaust angle in milliseconds. At this time, the fan 404 transforms from a cooling device into a powerful smoke extraction pump. It no longer supplies air inward, but instead forces the toxic and combustible gases generated inside the battery pack due to combustion to be discharged through the smoke exhaust pipe 11 and the synchronously opened solenoid valve 12. After the fire is extinguished, the piston rod 603 automatically resets under the action of the spring 606.

[0028] Please see the appendix Figure 5 -Appendix Figure 8 The auxiliary cooling component 7 includes a symmetrical cooling box 701. The outer wall of the cooling box 701 is fixed to both sides of the water cooling pipe 305. A second cooling plate 702 passes through the outer side of the cooling box 701. The cooling surface of the second cooling plate 702 is located inside the cooling box 701. Multiple heat dissipation plates 703 are fixed on the heat dissipation surface of the second cooling plate 702. An exhaust fan 704 is fixed on the outer wall of the heat dissipation plate 703. A water inlet pipe 8 passes through the upper end of the outer wall of the water tank 301. A water outlet pipe 9 passes through the lower end of the outer wall of the water tank 301. Valves 10 are installed inside both the water inlet pipe 8 and the water outlet pipe 9.

[0029] Specifically, the second cooling plate 702 powerfully cools the cooling tank 701, which is wrapped with water-cooling pipe 305, and directly performs secondary cooling on the circulating cooling water. The waste heat generated is conducted by the second heat sink 703 and forcibly discharged by the exhaust fan 704. The beneficial effects of this technical solution are that it can effectively cope with instantaneous high-power thermal shocks, avoid over-designing the main water cooling system to cope with occasional peaks, improve the overall operating efficiency and economy of the system, endow the battery pack with the ability to work in high-temperature environments, and ensure the operational reliability of the ship in tropical and other harsh sea conditions. More importantly, it can actively intervene in the early stage of thermal runaway by rapidly reducing the coolant temperature to suppress abnormal temperature rise, thus buying valuable time for subsequent fire-fighting actions and forming a preventive safety guarantee. The inlet pipe 8 and outlet pipe 9 with valve 10 configured in the water tank 301 provide standardized maintenance interfaces, solving the problem of inconvenient coolant replacement and replenishment, and ensuring the long-term efficient and reliable operation of the cooling system.

[0030] Working principle: The delivery pump 302 and circulation pump 307 in the water-cooling assembly 3 work together to continuously pump the cooling water in the water tank 301 into the water-cooling pipe 305, which is close to the battery pack 2, through the water suction pipe 303 and the first branch pipe 304 for efficient heat exchange. After absorbing heat, the water returns to the water tank 301 through the second branch pipe 306 and the return pipe 308. At the same time, when deep cooling is required, the auxiliary cooling assembly 7 is activated. The second cooling plate 702 in the cooling box 701 performs secondary cooling on the water-cooling pipe 305, and its heat sink... The heat generated by battery pack 2 (703) is forcibly exhausted by exhaust fan 704, while the top air-cooling assembly 4 also operates simultaneously. Fan 404 draws in outside air from dust filter 402. The air is first cooled by cooling fin 406 inside casing 401, and then guided by guide plate 405 and initial adjusting fins 609 to provide auxiliary heat dissipation to the upper part of battery pack 2 and the environment. The heat from cooling fin 406 is conducted to collection cover 408 by heat sink 407, and then extracted by air pump 410 through suction pipe 411 and exhaust pipe 41. 2. In the event of a fire, the dedicated high-pressure water pump 501 of the fire-fighting component 5 immediately starts, drawing water from the water tank 301 and powerfully spraying it onto the fire source through the hose 502 fixed by the fixing block 503 and the high-pressure nozzle 504. At the same time, the regulating component 6 is triggered by the fire-fighting water flow, and a stream of high-pressure water enters the piston cylinder 602 through the thin branch pipe 601, pushing the piston rod 603 to move against the elastic force of the spring 606. The rack 604 driven by the piston rod 603 then meshes with the gear 608, causing the rotating rod to rotate. 607 rotates and drives the adjusting fins 609 to deflect, instantly changing the airflow direction of the fan 404 from downward cooling to inward exhaust. It also forces the toxic fumes in the battery pack to be discharged through the exhaust pipe 11 and the synchronously opened solenoid valve 12, realizing the automatic linkage between fire extinguishing and smoke exhaust. After the fire is extinguished, the water pump 501 stops, the piston rod 603 is reset under the action of the spring 606, and the entire system returns to standby status. The water tank 301 can be maintained and replenished through the inlet pipe 8 and outlet pipe 9 with valve 10.

Claims

1. A marine power battery pack with fire-fighting function, characterized in that, include: A bracket (1) is provided, and a battery pack (2) is fixed inside the bracket (1). A water-cooling assembly (3) is located on the outside of its support (1). The water-cooling assembly (3) includes a water tank (301). The lower surface of the water tank (301) is fixed to the inner bottom of the support (1). A delivery pump (302) is fixed to the outer wall of the water tank (301). A water pump pipe (303) is fixed to the input end of the delivery pump (302). The end of the water pump pipe (303) is located inside the water tank (301). A diversion pipe (304) is fixed to the output end of the delivery pump (302). 4) has multiple water-cooling pipes (305) running through its outer side. The outer side of the water-cooling pipes (305) is attached to the outer wall of the battery pack (2). A second shunt pipe (306) is fixed to the end of the water-cooling pipes (305). A circulation pump (307) is fixed to the other side of the water tank (301). The input end of the circulation pump (307) is connected to the second shunt pipe (306). A return pipe (308) is fixed to the output end of the circulation pump (307). The end of the return pipe (308) is fixed inside the water tank (301). The air-cooled component (4) is set at the top of the bracket (1) to assist the water-cooled component (3) in accelerating the heat dissipation of the battery; Firefighting component (5), which is installed on water tank (301), is used to extinguish fire in the event of a fire; Adjustment component (6), which is set on air-cooled component (4), is used to adjust the function of air-cooled component (4); An auxiliary cooling component (7) is installed on the water cooling pipe (305) and is used to perform secondary cooling treatment on the cooling water inside the water cooling pipe (305).

2. A marine power battery pack with fire-fighting function according to claim 1, characterized in that, The fire-fighting component (5) includes a water pump (501), the input end of which is connected to a water tank (301), and the output end of which is fixed with a hose (502), and the end of which is fixed with a high-pressure nozzle (504).

3. A marine power battery pack with fire-fighting function according to claim 2, characterized in that, The outer wall of the hose (502) is fixed with a fixing block (503), the outer wall of the fixing block (503) is fixed to the outer wall of the water tank (301), and the outer wall of the high pressure nozzle (504) is provided with a placement rack (505), the outer wall of the placement rack (505) is fixed to the outer wall of the water tank (301).

4. A marine power battery pack with fire-fighting function according to claim 1, characterized in that, The air-cooled assembly (4) includes a housing (401), a dustproof net (402) is fixed to the top of the housing (401), a fixing plate (403) is fixed inside the housing (401), a fan (404) is fixed inside the fixing plate (403), and a plurality of guide plates (405) are fixed to the inner wall of the housing (401), with the guide plates (405) positioned below the fan (404).

5. A marine power battery pack with fire-fighting function according to claim 4, characterized in that, Multiple cooling plates (406) are passed through the outer wall of the outer shell (401). The cooling surface of the cooling plate (406) is located inside the outer shell (401). Multiple heat sinks (407) are fixed to the outer wall of each cooling plate (406). A connecting rod (409) is fixed to the outer wall of the outer shell (401). A collection cover (408) is fixed to the outer wall of the connecting rod (409). The outer wall of the collection cover (408) is located outside the heat sinks (407). An air pump (410) is fixed to the outer wall of the outer shell (401). An air extraction pipe (411) is fixed to the input end of the air pump (410). The end of the air extraction pipe (411) is connected to the collection cover (408). An exhaust pipe (412) is fixed to the output end of the air pump (410).

6. A marine power battery pack with fire-fighting function according to claim 1, characterized in that, The adjusting assembly (6) includes a thin branch tube (601), one end of which is fixed inside the hose (502), and the other end of which is fixed to a piston cylinder (602). A piston rod (603) slides inside the piston cylinder (602), and a fixing rod (605) is fixed inside the piston cylinder (602). One end of a spring (606) is fixed to the outer wall of the fixing rod (605), and the other end of the spring (606) is fixed to the piston of the piston rod (603). A rack (604) is fixed to the outer wall of the piston rod (603).

7. A marine power battery pack with fire-fighting function according to claim 5, characterized in that, The housing (401) has multiple rotating rods (607) inside, and the outer wall of the rotating rod (607) is fixed with adjusting fins (609). The end of the rotating rod (607) is located on the outside of the housing (401) and a gear (608) is fixed thereon. The gear (608) meshes with the rack (604).

8. A marine power battery pack with fire-fighting function according to claim 7, characterized in that, A smoke exhaust pipe (11) extends through the outer side of the outer casing (401), and a solenoid valve (12) is installed inside the smoke exhaust pipe (11).

9. A marine power battery pack with fire-fighting function according to claim 7, characterized in that, The auxiliary cooling assembly (7) includes a symmetrical cooling box (701). The outer wall of the cooling box (701) is fixed on both sides of the water cooling pipe (305). A second cooling plate (702) runs through the outer side of the cooling box (701). The cooling surface of the second cooling plate (702) is located inside the cooling box (701). A plurality of second heat sinks (703) are fixed on the heat dissipation surface of the second cooling plate (702). An exhaust fan (704) is fixed on the outer wall of the second heat sink (703).

10. A marine power battery pack with fire-fighting function according to claim 7, characterized in that, The upper end of the outer wall of the water tank (301) is connected to an inlet pipe (8), and the lower end of the outer wall of the water tank (301) is connected to an outlet pipe (9). Both the inlet pipe (8) and the outlet pipe (9) are equipped with valves (10).

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