Marine lithium battery cabin passing H120 fireproof certification

Abstract

The utility model provides a marine lithium battery cabin passing H120 fireproof certification, the marine lithium battery cabin comprises a box body and heat insulation structures, the box body comprises an outer box and an inner box, the inner box is located in the outer box, an interlayer is formed between the outer wall of the inner box and the inner wall of the outer box, and the heat insulation structures are laid in the interlayer and on the inner wall of the inner box. According to the configuration, firstly, the box body with a double-layer structure is used as a main body structure, the inner wall of the inner box is used as a first protective surface of a counter-fire surface, so that flame impact during violent combustion of the battery can be avoided, and the inner box has the function of fixing the battery; the purposes of fire prevention and heat insulation are achieved by laying the heat insulation structures on the inner wall of the inner box and in the interlayer, and the requirements for small size, low thickness and low cost are met.

Description

Technical Field

[0001] The utility model relates to the technical field of ship equipment, and particularly relates to a marine lithium battery compartment that has passed the H120 fire protection certification. Background Art

[0002] With the popularization of new energy vehicle batteries and motors and the increase in their penetration rate, marine electric propulsion systems have also developed vigorously globally. Currently, electric propulsion yachts have been launched, and there are also many equipment manufacturers of electric propulsion systems. The characteristics of electric propulsion systems, such as quietness, environmental friendliness, and limited endurance, are very suitable for power products of sailing yachts at this stage.

[0003] However, the requirements for lithium batteries and lithium battery compartments used in electric propulsion systems are different at home and abroad. Relevant domestic regulations stipulate that:

[0004] 1. The lithium-ion battery compartment needs to meet H-class fire separation;

[0005] 2. For yachts built with non-steel or aluminum alloy materials, the interface forming the battery compartment needs to have a structural fire protection time of at least 2 hours, pass a standard fire resistance test of at least 2 hours, and also have load-bearing capacity. After testing, it is confirmed that the hull and superstructure will not collapse within this time. The heat insulation material should be laid on both sides of the separation, but for the heat insulation materials on the side shell, bottom plate, and adjacent bulkheads and decks of compartments without fire risk such as empty compartments and toilets, it can be laid only on the side of the separation facing the battery compartment.

[0006] In China, the hulls in the yacht field are mostly made of fiberglass structures and materials. Currently, there are no available products for lithium battery compartments of fiberglass yachts. And if lithium battery compartment products are to be applied to fiberglass yachts, they must also meet the fire resistance tests of relevant professional institutions, and such tests are more stringent than those of ordinary steel ships and existing general test standards.

[0007] Currently, the fire resistance ratings and fire separations commonly adopted by steel ships are A30 and A60.

[0008] In terms of materials, most of the fire-resistant materials on the market are product grades that meet this standard, and the main materials are silicon-based fireproof cotton and fireproof boards, with a general thickness of 40 - 80 mm. While the fire resistance requirement for application on fiberglass yachts is H-class for 120 minutes. The temperature requirement is higher, and the test time requirement is also longer. There are a small number of materials on the market that have passed the H-class certification, and they all increase the thickness of the material on the basis of the original A-class fire protection requirement to delay the rise of temperature. For example, a leading brand that uses silicate as the main material has a thickness of 120 - 150 mm.

[0009] In terms of mature products, products that have passed the fire resistance rating certification are mostly the marine decks and bulkheads of steel ships. These products are all planar structures, and the material thickness is basically not restricted by space and can be thickened at will.

[0010] However, for fiberglass yachts, firstly, due to the limited space of the hull, it is impossible to meet the requirements by simply piling up and increasing the thickness of the fire-resistant material in the lithium battery compartment; secondly, the products on the current market are all planar structures, while the battery compartment box is a polyhedron. The polyhedron not only has similar fire-resistant and heat-insulating requirements for each surface, but also puts forward higher requirements in terms of the strength of the three-dimensional structure under fire, the technological requirements of the fire-resistant material between surfaces, etc.

[0011] Therefore, how to develop a lithium battery compartment with a small volume, low thickness, suitable for fiberglass yachts, meeting the requirements of the H120 fire resistance test, and adapted to the electric propulsion system is an urgent problem to be solved. Summary of the Utility Model

[0012] The utility model provides a marine lithium battery compartment that has passed the H120 fire protection certification, and has the advantages of small volume, low thickness, being suitable for fiberglass yachts, meeting the requirements of the H120 fire resistance test, and being adapted to the electric propulsion system.

[0013] To solve the above technical problems, the utility model provides a marine lithium battery compartment that has passed the H120 fire protection certification, which includes:

[0014] A box body, the box body includes an outer box and an inner box, the inner box is located in the outer box, and a sandwich layer is formed between the outer wall of the inner box and the inner wall of the outer box, and a battery is fixed on the inner wall of the inner box;

[0015] An adiabatic structure, the adiabatic structure is laid on both the sandwich layer and the inner wall of the inner box.

[0016] Optionally, the adiabatic structure includes multiple adiabatic layers, and the multiple adiabatic layers are stacked.

[0017] Optionally, on two adjacent inner walls of the outer box, the multiple adiabatic layers on one inner wall and the multiple adiabatic layers on the other inner wall are stagger-lapped;

[0018] On two adjacent inner walls of the inner box, the multiple adiabatic layers on one inner wall and the multiple adiabatic layers on the other inner wall are stagger-lapped.

[0019] Optionally, the material of the adiabatic structure is nano-porous adiabatic material.

[0020] Optionally, the material of the inner box and the material of the outer box are both carbon steel.

[0021] Optionally, the thickness of the outer box is 2 mm, and the thickness of the inner box is 3 mm.

[0022] Optionally, the marine lithium battery compartment further includes a cable penetration fitting, which penetrates through the inner box and the outer box. The cable penetration fitting is used for the cable to pass through, and is fixedly connected to the inner box. The outer box is used for fixing on the hull.

[0023] Optionally, the cable penetration fitting includes an outer pipe and an expansion sleeve filled in the outer pipe.

[0024] Optionally, the cable penetration fitting further includes expansion sealants provided at both ends inside the expansion sleeve.

[0025] Optionally, the marine lithium battery compartment further includes a fire extinguishing conduit penetrating through the inner box and the outer box.

[0026] In summary, in the marine lithium battery compartment provided by the present utility model, the marine lithium battery compartment includes a box body and a heat insulation structure. The box body includes an outer box and an inner box. The inner box is located inside the outer box, and a sandwich layer is formed between the outer wall of the inner box and the inner wall of the outer box. Heat insulation structures are laid on both the sandwich layer and the inner wall of the inner box. With such a configuration, firstly, the present utility model uses a box body with a double-layer structure as the main structure. The inner wall of the inner box serves as the first protective surface facing the fire, which can avoid the flame impact during the intense combustion of the battery. Moreover, the inner box also has the function of fixing the battery. By laying heat insulation structures on the inner wall of the inner box and in the sandwich layer, the purpose of fire prevention and heat insulation is achieved, meeting the requirements of small volume, low thickness, and low cost. Description of the Drawings

[0027] Those of ordinary skill in the art should understand that the provided drawings are used to better understand the present utility model and do not constitute any limitation to the scope of the present utility model. Among them:

[0028] Figure 1 is a schematic diagram of a marine double-layer battery compartment according to an embodiment of the present utility model;

[0029] Figure 2 is a schematic diagram of a heat insulation structure according to an embodiment of the present utility model;

[0030] Figure 3 is a schematic diagram of a cable penetration fitting according to an embodiment of the present utility model.

[0031] In the drawings:

[0032] 11 - outer box; 12 - inner box; 20 - heat insulation structure; 21 - heat insulation layer; 30 - cable penetration fitting; 31 - outer pipe; 32 - expansion sleeve; 33 - expansion sealant; 40 - cable; 50 - fire extinguishing conduit. Detailed Embodiments

[0033] To make the objectives, advantages and features of the present utility model clearer, the following further describes the present utility model in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the accompanying drawings are in a very simplified form and not drawn to scale, and are only used to conveniently and clearly assist in explaining the objectives of the embodiments of the present utility model. In addition, the structures shown in the accompanying drawings are often part of the actual structures. In particular, the accompanying drawings need to show different emphases and sometimes use different scales.

[0034] As used in the present utility model, the singular forms "a", "an" and "the" include plural objects. The term "or" is generally used in the sense of including "and / or". The term "several" is generally used in the sense of including "at least one". The term "at least two" is generally used in the sense of including "two or more". In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third" may explicitly or implicitly include one or at least two of such features. "One end" and "the other end", as well as "proximal end" and "distal end" usually refer to two corresponding parts, which include not only the endpoints. The terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. In addition, as used in the present utility model, when an element is disposed on another element, it generally only indicates that there is a connection, coupling, cooperation or transmission relationship between the two elements, and the two elements may be directly or indirectly connected, coupled, cooperated or transmitted through an intermediate element, and cannot be understood as indicating or implying the spatial position relationship between the two elements, that is, an element may be inside, outside, above, below or on one side of another element, etc., in any orientation, unless otherwise clearly specified in the content. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] Figure 1 It is a schematic diagram of a marine double-layer battery compartment according to an embodiment of the present utility model. Refer to Figure 1, an embodiment of the present utility model schematically provides a marine lithium battery compartment that has passed the H120 fire protection certification and is applicable to glass yachts. The marine lithium battery compartment includes a box body and a heat insulation structure 20. The box body includes an outer box 11 and an inner box 12. The inner box 12 is located inside the outer box 11, and there is a gap between the outer wall of the inner box 12 and the inner wall of the outer box 11, thus forming a sandwich layer. The battery (lithium battery) is fixed on the inner wall of the inner box 12; the heat insulation structure 20 is laid in the sandwich layer, and the heat insulation structure 20 is also laid on the inner wall of the inner box 12. In one embodiment, both the outer box 11 and the inner box 12 are square structures. With such a configuration, first of all, the present utility model uses a box body with a double-layer structure as the main structure. The inner wall of the inner box 12 serves as the first protective surface facing the fire, which can avoid the flame impact during the intense combustion of the battery. Moreover, the inner box 12 also has the function of fixing the battery. By laying the heat insulation structure 20 on the inner wall of the inner box 12 and in the sandwich layer, the purpose of fire prevention and heat insulation is achieved, avoiding damage to the inside and outside of the battery compartment by the fire source, and meeting the requirements of small volume, low thickness and low cost. In addition, the battery is directly fixed on the inner box 12 of the marine double-layer battery compartment. Compared with the single-layer box body in the prior art that requires an installation structure (such as a steel bracket) to fix the battery, the present utility model can also save the installation structure. In one embodiment, the thickness of the outer box 11 is 2 mm, and the thickness of the inner box 12 is 3 mm

[0036] Preferably, the materials of both the inner box 12 and the outer box 11 are carbon steel. The fiberglass material itself belongs to a composite material and has a relatively low ignition point. Therefore, most of the lithium battery compartments in the prior art use a steel box body as the main load-bearing structure. Considering the strength and self-weight of the box body, and also considering the deformation rate at high temperatures, this embodiment preferably uses carbon steel material to make the box body, which can inhibit the deformation of the box body caused by high temperature and avoid the heat insulation structure 20 being damaged due to the deformation of the box body and resulting in heat leakage.

[0037] Figure 2 is a schematic diagram of the heat insulation structure of an embodiment of the present utility model. Further, refer to Figure 2 , the heat insulation structure 20 includes multiple heat insulation layers 21, and the multiple heat insulation layers 21 are stacked in sequence. Such a stacked arrangement can maximize the heat insulation effect as much as possible. The thickness of a single heat insulation layer 21 can be, for example, 10 mm,. Preferably, on two adjacent inner walls of the outer box 11, the multiple heat insulation layers 21 on one inner wall and the multiple heat insulation layers 21 on the other inner wall are stagger-lapped. Correspondingly, for two adjacent inner walls of the inner box 12, the multiple heat insulation layers 21 on one inner wall and the heat insulation layers 21 on the other inner wall are stagger-lapped. In this way, such a stagger-splicing method can ensure that both ends of the insulation layer are lapped on the insulation on the adjacent other inner wall, avoiding heat leakage from the splicing seam of the insulation layer and greatly improving the heat insulation effect.

[0038] Preferably, the material of the heat insulation structure 20 is nano-porous heat insulation material, that is, the material of the heat insulation layer 21 is nano-porous heat insulation material. As an example, the heat insulation layer 21 is an aerogel felt, which is a flexible and highly efficient heat insulation felt. This material combines nano-aerogel with inorganic fibers. In the prior art, silicate fireproof cotton is used as the fireproof and heat insulation structure. To meet the requirements of the H120 grade, the thickness should be at least 120 mm - 150 mm. In practical application scenarios, the space reserved for lithium batteries in a fiberglass yacht cannot meet the requirements of the aforementioned thickness. In this embodiment, the aerogel felt is used, and the thickness of the heat insulation structure 20 can be reduced while meeting the requirements of H120.

[0039] Figure 3 is a schematic diagram of a cable penetration fitting according to an embodiment of the present invention. Refer to Figure 3 , the marine lithium battery compartment further includes a cable penetration fitting 30. The cable penetration fitting 30 penetrates through the inner box 12 and the outer box 11. The cable penetration fitting 30 is used for the cable 40 to pass through. The cable penetration fitting 30 is fixedly connected to the inner box 12. The outer box 11 is used to be fixed on the hull. One end of the cable 40 is connected to the battery inside the box, and the other end of the cable 40 is connected to the ship control system outside the box. In this way, the inner box 12 is fixedly connected to the cable 40 penetration fitting, and the outer box 11 is fixed on the hull, which can prevent the heat in the inner box 12 from being transferred to the outer box 11 and then to the hull.

[0040] Furthermore, the cable penetration fitting 30 includes an outer pipe 31 (such as a steel pipe) and an expansion sleeve 32 filled in the outer pipe 31. The expansion sleeve 32 uses high-quality environmentally friendly polymer materials, does not contain harmful components such as halogens and asbestos, and has no corrosive effect on the cable 40 and metal components. In the cable penetration fitting 30, the expansion sleeve 32 is mainly used for the wrapping interval and gap filling of the cable 40.

[0041] As a preference, the cable penetration fitting 30 further includes expansion sealants 33 provided at both ends inside the expansion sleeve 32. The expansion sealants 33 adopt a one-component neutral formula, do not contain halogens and asbestos, and have no corrosive effect on the cable 40 and metal components. The expansion sleeve 32 and the expansion sealants 33 can not only provide overall fire resistance and heat insulation, but also improve the airtightness and watertightness of the overall structure.

[0042] Furthermore, the marine lithium battery compartment further includes a fire extinguishing conduit 50 that penetrates through the inner box 12 and the outer box 11. In one embodiment, a temperature sensor, a smoke sensor, and a combustible gas detector can be equipped on the inner side of the top of the box body of the inner box 12. When thermal runaway or fire occurs inside the inner box 12, the temperature and smoke are detected and reported to the control system, and the external fire extinguishing agent is injected into the inside of the inner box 12 through the fire extinguishing conduit 50 for fire extinguishing, so that the internal thermal runaway or fire is strictly controlled inside the box body and will not spread to the outside of the box body.

[0043] In summary, in the marine lithium battery compartment provided by the present utility model, the marine lithium battery compartment includes a box body and a heat insulation structure 20. The box body includes an outer box 11 and an inner box 12. The inner box 12 is located in the outer box 11, and a sandwich layer is formed between the outer wall of the inner box 12 and the inner wall of the outer box 11. The heat insulation structure 20 is laid on both the sandwich layer and the inner wall of the inner box 12. With such a configuration, first of all, the present utility model uses a box body with a double-layer structure as the main structure. The inner wall of the inner box 12 serves as the first protective surface facing the fire, which can avoid the flame impact during the intense combustion of the battery. Moreover, the inner box 12 also has the function of fixing the battery. By laying the heat insulation structure 20 on the inner wall of the inner box 12 and in the sandwich layer, the purpose of fire prevention and heat insulation is achieved, meeting the requirements of small volume, low thickness, and low cost.

[0044] Although the present utility model is disclosed above with preferred embodiments, the above embodiments are not intended to limit the present utility model. For any person skilled in the art, without departing from the scope of the technical solution of the present utility model, many possible changes and modifications can be made to the technical solution of the present utility model by using the technical content disclosed above, or it can be modified into equivalent embodiments with equivalent changes. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model still belong to the scope of protection of the technical solution of the present utility model.

Claims

1. A marine lithium battery compartment that has passed H120 fire protection certification, characterized in that: include: A box body, the box body comprising an outer box and an inner box, the inner box is located in the outer box, and a sandwich is formed between the outer wall of the inner box and the inner wall of the outer box, and batteries are fixed on the inner wall of the inner box; The heat-insulating structure is provided in the interlayer and on the inner wall of the inner box.

2. The marine lithium battery compartment having passed H120 fire protection certification according to claim 1, characterized in that: The thermal insulation structure comprises a plurality of thermal insulation layers, and the plurality of thermal insulation layers are stacked.

3. The marine lithium battery compartment with H120 fire protection certification according to claim 2, characterized in that: On two adjacent inner walls of the outer box, the multiple layers of the heat insulating layers on one inner wall and the multiple layers of the heat insulating layers on the other inner wall are overlapped with each other; On two adjacent inner walls of the inner box, the multiple layers of the heat insulating layers on one inner wall and the multiple layers of the heat insulating layers on the other inner wall are overlapped with each other.

4. The marine lithium battery compartment with H120 fire protection certification according to claim 1, characterized in that: The material of the thermal insulation structure is nano-microporous thermal insulation material.

5. According to the H120 fireproof certified marine lithium battery compartment of claim 1, the material of the inner box and the material of the outer box are both carbon steel.

6. The marine lithium battery compartment with H120 fire protection certification according to claim 1, characterized in that: The thickness of the outer box is 2 mm, and the thickness of the inner box is 3 mm.

7. The marine lithium battery compartment with H120 fire protection certification according to claim 1, characterized in that: The marine lithium battery compartment also includes a cable penetration fitting, which penetrates the inner box and the outer box, is used for allowing cables to pass through, is fixedly connected to the inner box, and the outer box is used to be fixed on the hull.

8. The marine lithium battery compartment having passed H120 fire protection certification according to claim 7, characterized in that: The cable penetration pipe comprises an outer pipe and an expansion sleeve filled in the outer pipe.

9. The marine lithium battery compartment having passed H120 fire protection certification according to claim 8, characterized in that: The cable penetration pipe also includes expansion sealants arranged at both ends of the expansion sleeve.

10. The marine lithium battery compartment with H120 fire protection certification according to claim 1, characterized in that: The marine lithium battery compartment also includes a fire extinguishing conduit penetrating the inner box and the outer box.

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