Fireproof blanket, battery pack and electric vehicle

Abstract

The utility model relates to the technical field of fireproof products for batteries, in particular to a fireproof blanket, a battery pack and an electric automobile. The fireproof blanket comprises an energy absorption layer and a fireproof layer which are arranged in a stacked mode, and the fireproof layer comprises an expanded glass fiber cloth layer and a composite fireproof cloth layer which are arranged in a stacked mode. The fireproof blanket provided by the utility model is applied to the battery pack, the safety of the battery pack under extreme conditions such as fire disasters and collisions can be remarkably improved, and the expanded glass fiber cloth layer and the composite fireproof cloth layer are laminated in the fireproof layer, so that the fireproof blanket is convenient to process and use while high-efficiency fire resistance and heat insulation performance are provided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fireproof products for batteries, in particular to a fireproof blanket, a battery pack and an electric vehicle. BACKGROUND

[0002] In the current electric vehicle industry, in order to simplify the structure to achieve the purpose of improving space utilization and reducing cost; has begun to explore more compact integrated technology, which improves the volume utilization and energy density by reducing or omitting unnecessary structural components. However, such integrated design also brings some new challenges, especially in the safety after thermal runaway.

[0003] And the battery pack as one of the core components of electric vehicles, its safety has received more and more attention. Once a certain cell occurs thermal runaway, due to the lack of effective isolation measures, high temperature may spread rapidly to other cells, triggering a chain reaction, endangering the safety of the whole vehicle. SUMMARY

[0004] To solve the technical problem of high risk of thermal runaway of the existing battery pack, the utility model provides a fireproof blanket, a battery pack and an electric vehicle.

[0005] The technical problem of the utility model is solved by providing a fireproof blanket applied to the battery pack of an electric vehicle, the fireproof blanket comprising an energy absorption layer and a fireproof layer stacked.

[0006] Preferably, the composite fireproof cloth layer comprises a fire-resistant fabric layer and a ceramicized silicone rubber layer stacked.

[0007] Preferably, one side of the fire-resistant fabric layer is provided with the ceramicized silicone rubber layer; or, both sides of the fire-resistant fabric layer are provided with the ceramicized silicone rubber layer.

[0008] Preferably, the energy absorption layer and the fireproof layer are stitched and fixed; and / or, the energy absorption layer and the fireproof layer are adhesively fixed.

[0009] Preferably, the energy absorption layer and the fireproof layer are integrally formed in an integrated structure.

[0010] Preferably, the thickness of the energy absorption layer ranges from 1 to 20 mm; and / or, the thickness of the fireproof layer ranges from 0.5 to 5 mm; and / or, the thickness of the bulk glass fiber cloth ranges from 0.5 to 4 mm; and / or, the thickness of the fire-resistant fabric layer ranges from 0.03 to 1 mm; and / or, the thickness of the ceramicized silicone rubber layer ranges from 0.02 to 1 mm; the thickness of the bulk glass fiber cloth layer is greater than the thickness of the fireproof cloth layer; and / or, the thickness of the fire-resistant fabric layer is greater than the thickness of the ceramicized silicone rubber.

[0011] Preferably, the material of the energy-absorbing layer comprises at least one of silicon foam, polyurethane foam, melamine foam, expanded polypropylene, melamine phosphate and neoprene; and the material of the fire-resistant fabric layer comprises at least one of glass fiber, basalt fiber, carbon fiber and aluminum silicate fiber.

[0012] Another solution to the technical problem of the utility model is to provide a battery pack comprising a body and the fireproof blanket as described above, wherein the fireproof blanket is arranged on the body.

[0013] Another solution to the technical problem of the utility model is to provide an electric vehicle comprising a chassis and a battery pack arranged on the chassis, wherein the battery pack comprises a body and the fireproof blanket as described above, and the fireproof blanket is arranged between the chassis and the body.

[0014] Preferably, the body comprises a shell provided with an opening and a battery pack arranged in the shell, the fireproof blanket is arranged on the side of the chassis close to the shell, and a chassis cover is arranged at the opening.

[0015] Compared with the prior art, the fireproof blanket, the battery pack and the electric vehicle have the following advantages:

[0016] 1. The fireproof blanket according to the utility model embodiment is applied to the battery pack, which can significantly improve the safety of the battery pack under extreme conditions such as fire and collision. The fireproof blanket provides an integrated solution through the energy-absorbing layer and the fire-resistant layer arranged in layers, which not only enhances the protection capability of the battery pack against thermal runaway and other extreme conditions, but also effectively reduces the vibration and noise during vehicle driving. Specifically, the energy-absorbing layer can effectively reduce the vibration caused by the operation of the motor and other components, improve the quietness and stability in the passenger compartment, and also isolate external noise to maintain the tranquility of the vehicle interior and improve the comfort experience of passengers. The fire-resistant layer is the core part of the fireproof blanket and is composed of an expanded glass cloth layer and a composite fireproof cloth layer, which aims to provide efficient fire resistance and heat insulation performance. In the event of thermal runaway, the fire-resistant layer can effectively prevent the spread of flames to other areas and protect the passengers. Specifically, the expanded glass cloth layer used in the fire-resistant layer has a very low thermal conductivity and almost no heat conduction, which greatly reduces the possibility of heat transfer. At the same time, it provides good mechanical strength and dimensional stability, helping to maintain the structural integrity of the entire fire-resistant layer. In particular, the use of the expanded glass cloth layer after expansion in the fire-resistant layer makes it softer and easier to process, which can better adapt to different shapes and sizes. The composite fireproof cloth layer used in the fire-resistant layer can further enhance the fireproof and heat insulation performance of the fireproof blanket.

[0017] 2. In the composite fireproof cloth layer of the embodiment of the present application, the fire-resistant fabric layer provides basic fire resistance and mechanical strength, ensuring that the fireproof layer can maintain structural integrity at high temperatures; the ceramicized silicone rubber layer has excellent fire resistance and flexibility, enabling it to work continuously in a high-temperature environment while providing certain sealing and cushioning effects; the two layers are stacked to combine the advantages of both materials, enhancing the overall performance of the fireproof layer.

[0018] 3. In the composite fireproof cloth layer of the embodiment of the present application, single-sided or double-sided coverage can be selected according to design requirements to adapt to different application scenarios.

[0019] 4. The energy-absorbing layer and the fireproof layer of the embodiment of the present application have various fixing methods, which can be selected according to requirements; stitching ensures firm connection between the two layers, especially suitable for situations where large tensile or shear forces are applied; adhesive fixing simplifies the production process, improves production efficiency, and is suitable for situations where quick installation or adjustment is required; and the combination of the two can further enhance the connection stability between the energy-absorbing layer and the fireproof layer.

[0020] 5. In the fireproof blanket of the embodiment of the present application, the energy-absorbing layer and the fireproof layer are integrally formed to ensure seamless connection between the two, eliminating the interface defects or weak points that may occur in traditional layered structures; this not only improves the mechanical strength of the entire fireproof blanket, but also enhances its ability to resist external impact; as there is no additional interface thermal resistance, heat can be more evenly transmitted and dispersed, reducing the likelihood of local overheating. This helps better control the temperature rise rate and improve the overall fire resistance of the fireproof blanket.

[0021] 6. In the fireproof blanket of the embodiment of the present application, the material selection of the energy-absorbing layer and the fire-resistant fabric layer is diverse, with different materials selected to adapt to various application scenarios and technical requirements, ensuring that the fireproof blanket can be customized according to actual needs to meet different performance indicators.

[0022] 7. The embodiment of the present application also provides a battery pack, which contains the above-mentioned fireproof blanket, so the battery pack also has the same beneficial effects as the above-mentioned fireproof blanket, which will not be repeated here.

[0023] 8. The embodiment of the present application also provides an electric vehicle, which contains the above-mentioned fireproof blanket, so the electric vehicle also has the same beneficial effects as the above-mentioned fireproof blanket, which will not be repeated here.

[0024] 9. The electric vehicle of the embodiment of the utility model, through being equipped with the chassis cover at the opening of the shell, make it serve as the upper cover of the battery pack shell, reduce the unnecessary structural member, thereby reduce the overall weight, after removing the additional upper cover, release more internal space, make the battery pack can be more compactly arranged, improve the volume utilization rate and energy density. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the layered schematic view of the fireproof blanket provided by the embodiment of the utility model.

[0026] Figure 2 It is the layered separation schematic view of the fireproof blanket provided by the embodiment of the utility model.

[0027] Figure 3 It is the layered separation schematic view of the composite fireproof cloth layer of the fireproof blanket provided by the embodiment of the utility model Figure 1 .

[0028] Figure 4 It is the layered separation schematic view of the composite fireproof cloth layer of the fireproof blanket provided by the embodiment of the utility model Figure 2 .

[0029] Figure 5 It is the front view of the fireproof blanket provided by the embodiment of the utility model.

[0030] Figure 6 It is the schematic view of the battery pack provided by the embodiment of the utility model Figure 1 .

[0031] Figure 7 It is the schematic view of the battery pack provided by the embodiment of the utility model Figure 2 .

[0032] Figure 8 It is the block diagram of the electric vehicle provided by the embodiment of the utility model.

[0033] The figure mark is explained:

[0034] 100, electric vehicle;10, battery pack;

[0035] 1, fireproof blanket;2, energy absorption layer;3, fireproof layer;31, bulk glass cloth layer;32, composite fireproof cloth layer;321, fire-resistant fabric layer;322, ceramicized silicone rubber layer;4, adhesive layer;5, through hole;6, body;61, shell;62, battery. DETAILED DESCRIPTION

[0036] In order to make the purpose of the utility model, technical scheme and advantage more clear and explicit, the following will be further described in detail in combination with the drawings and the embodiment.

[0037] It should be noted that the terms "first" and "second" in the specification and claims of the utility model are used to distinguish different objects, not to describe a specific order.

[0038] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only.

[0039] In the utility model, the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal", and the like are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the utility model and its embodiments, and are not used to limit the indicated devices, elements, or components to necessarily have a specific orientation, or to be constructed and operated in a specific orientation.

[0040] In addition, in addition to being used to indicate directions or positional relationships, the above-mentioned terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. Those skilled in the art can understand the specific meanings of these terms in the utility model according to the specific circumstances.

[0041] In addition, the terms "mount", "set", "provided with", "connected", and "connected" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, or it can be internal communication between two devices, elements, or components. Those skilled in the art can understand the specific meanings of the above-mentioned terms in the utility model according to the specific circumstances.

[0042] Please combine Figure 1 and Figure 2 The utility model first embodiment provides a kind of fire blanket 1, it is applied to the battery pack of electric vehicle, fire blanket 1 includes the energy-absorbing layer 2 and fireproof layer 3 of laminated arrangement, fireproof layer 3 includes the bulk glass cloth layer 31 and composite fireproof cloth layer 32 of laminated arrangement.

[0043] It can be understood that the fireproof blanket 1 provided by the utility model embodiment provides an integrated solution by the energy-absorbing layer 2 and the fireproof layer 3 arranged in layers, and the fireproof blanket 1 is applied to the battery pack, which can significantly improve the safety of the battery pack under extreme conditions such as fire and collision, not only enhances the protection capability of the battery pack against thermal runaway and other extreme conditions, but also effectively reduces the vibration and noise during vehicle driving.

[0044] The energy-absorbing layer 2 can effectively reduce the vibration caused by the operation of components such as motors, improve the quietness and stability in the passenger compartment, and also isolate external noise to maintain the tranquility of the vehicle interior and improve the comfort experience of passengers. It should be noted that the energy-absorbing layer 2 is usually made of materials with high elasticity and good cushioning performance. These materials have the characteristics of storing energy when compressed and releasing energy when restoring shape, thereby effectively absorbing and dispersing impact force.

[0045] The fireproof layer 3 is the core part of the fireproof blanket 1 and is composed of the bulk glass cloth layer 31 and the composite fireproof cloth layer 32, aiming to provide efficient fire resistance and heat insulation performance. In the event of thermal runaway, the fireproof layer 3 can effectively prevent the spread of flames to other areas and protect the safety of passengers. Specifically, the bulk glass cloth layer 31 used in the fireproof layer 3 has a very low thermal conductivity and almost no heat conduction, greatly reducing the possibility of heat transfer, while providing good mechanical strength and dimensional stability to help maintain the structural integrity of the entire fireproof layer 3. In particular, the bulk glass cloth layer 31 used in the fireproof layer 3 is more flexible and easier to process, which can better adapt to different shapes and sizes, while the composite fireproof cloth layer 32 used in the fireproof layer 3 can further enhance the fireproof and heat insulation performance of the fireproof blanket 1.

[0046] Bulk glass cloth refers to bulk yarn glass fiber cloth, which is made of high-temperature-resistant and high-strength glass fiber yarn after bulking treatment and special process manufacturing. This material combines the basic properties of glass fiber and the unique properties after bulking treatment, and can withstand instantaneous high temperature. Through special bulking treatment, the glass fiber yarn becomes fluffy and the volume increases, which not only increases the thickness of the fabric, but also gives it better heat and sound insulation effect. Although the volume increases after bulking treatment, the overall weight does not increase significantly, while maintaining high mechanical strength. The inherent heat resistance of glass fiber enables the bulk yarn glass fiber cloth to work stably in high-temperature environments for a long time, suitable for industrial insulation, fire prevention and other occasions.

[0047] As an optional implementation, the energy-absorbing layer 2 and the fireproof layer 3 are stitched and fixed; and / or, the energy-absorbing layer 2 and the fireproof layer 3 are adhesively fixed.

[0048] It can be understood that the energy-absorbing layer 2 and the fireproof layer 3 of the utility model embodiment have various fixing modes, which can be selected according to requirements; the suture fixing ensures the firm connection between the two layers, and is particularly suitable for the case of bearing large tension or shear force; the adhesive fixing simplifies the production process, improves the production efficiency, and is suitable for the case of requiring quick installation or adjustment; and the combination of the two can further enhance the connection stability between the energy-absorbing layer 2 and the fireproof layer 3.

[0049] Specifically, when the energy-absorbing layer 2 and the fireproof layer 3 are adhesively fixed, double-sided tape or adhesive can be arranged between the energy-absorbing layer 2 and the fireproof layer 3 as the adhesive layer 4 for fixing.

[0050] As an embodiment, the energy-absorbing layer 2 and the fireproof layer 3 are integrally formed in an integrated structure.

[0051] It can be understood that in the fireproof blanket 1 of the utility model embodiment, the integrally formed energy-absorbing layer 2 and fireproof layer 3 ensure the seamless connection between the two, eliminating the interface defects or weak points that may occur in the traditional layered structure; this not only improves the mechanical strength of the entire fireproof blanket 1, but also enhances its ability to resist external impact; since there is no additional interface thermal resistance, heat can be more uniformly transmitted and dispersed, reducing the possibility of local overheating. This helps to better control the temperature rise rate and improve the overall fire resistance of the fireproof blanket 1.

[0052] As an optional embodiment, the fireproof cloth can be integrally formed by a calendering or coating process.

[0053] Illustratively, the calendering forming process steps are as follows: first, prepare the fire-resistant fabric and the ceramicized silicone rubber; place the fire-resistant fabric between the two layers of ceramicized silicone rubber to form a sandwich structure; and use a calender to continuously calender the above multi-layer material. The calender applies uniform pressure through one or more pairs of rotating rollers to tightly bond the layers of material together. It can be understood that the pressure applied during the calendering process makes the interface between the layers of material more tightly, reduces the air gap, and enhances the stability of the overall structure; the thickness of the finished product can be accurately controlled to ensure that each piece of fireproof cloth has the same performance parameters, improving the consistency of product quality.

[0054] For example, the coating forming process steps are as follows: selecting a refractory fabric as a base material to ensure that it has sufficient mechanical strength and fire resistance; using professional coating equipment such as a doctor blade coater, a reverse coater, etc. to uniformly coat the ceramicized silicone rubber on the refractory fabric; for the case of double-sided coverage, the fabric can be turned over after one side is coated, and the same coating process is performed on the other side; after coating, the fireproof cloth usually needs to be cured at a certain temperature and time to ensure that the ceramicized silicone rubber is completely cross-linked to form a stable coating. Understandably, the coating process can provide a very smooth and flat surface, reducing the finishing work in subsequent processing and improving the appearance quality of the final product.

[0055] Please refer to Figure 3 As an embodiment, the composite fireproof cloth layer 32 comprises a refractory fabric layer 321 and a ceramicized silicone rubber layer 322 arranged in layers.

[0056] Understandably, in the composite fireproof cloth layer 32 of the embodiments of the present application, the refractory fabric layer 321 provides basic fire resistance and mechanical strength, which can ensure that the fireproof layer 3 still maintains structural integrity at high temperatures; the ceramicized silicone rubber layer 322 has excellent fire resistance and flexibility, which can work continuously in a high-temperature environment while providing certain sealing and cushioning effects; the two are arranged in layers to combine the advantages of the two materials and enhance the overall performance of the fireproof layer 3.

[0057] Please refer to Figure 3 and Figure 4 As an optional embodiment, one side of the refractory fabric layer 321 is provided with a ceramicized silicone rubber layer 322 (as shown in Figure 3 ); or, both sides of the refractory fabric layer 321 are provided with ceramicized silicone rubber layers 322 (as shown in Figure 4 ).

[0058] Understandably, in the composite fireproof cloth layer 32 of the embodiments of the present application, single-sided coverage or double-sided coverage can be selected according to design requirements to adapt to different application scenarios.

[0059] As an embodiment, the thickness of the energy-absorbing layer 2 ranges from 1 to 20 mm; and / or, the thickness of the fireproof layer 3 ranges from 0.5 to 5 mm; and / or, the thickness of the bulk glass cloth ranges from 0.5 to 4 mm; and / or, the thickness of the refractory fabric layer 321 ranges from 0.03 to 1 mm; and / or, the thickness of the ceramicized silicone rubber layer 322 ranges from 0.02 to 1 mm.

[0060] As an embodiment, the thickness of the energy-absorbing layer 2 ranges from 1 to 5 mm; or 5 to 10 mm or 10 to 15 mm or 15 to 20 mm.

[0061] As an implementation form, the thickness of the fireproof layer 3 ranges from 0.5 to 1 mm or from 1 to 1.5 mm or from 1.5 to 2 mm or from 2 to 2.5 mm or from 2.5 to 3 mm or from 3 to 3.5 mm or from 3.5 to 4 mm or from 4 to 4.5 mm or from 4.5 to 5 mm.

[0062] As an implementation form, the thickness of the intumescent glass cloth ranges from 0.5 to 1 mm or from 1 to 1.5 mm or from 1.5 to 2 mm or from 2 to 2.5 mm or from 2.5 to 3 mm or from 3 to 3.5 mm or from 3.5 to 4 mm.

[0063] As an implementation form, the thickness of the fire-resistant fabric layer 321 ranges from 0.03 to 0.2 mm or from 0.2 to 0.4 mm or from 0.4 to 0.6 mm or from 0.6 to 0.8 mm or from 0.8 to 1 mm.

[0064] As an implementation form, the thickness of the ceramifiable silicone rubber layer 322 ranges from 0.02 to 0.2 mm or from 0.2 to 0.4 mm or from 0.4 to 0.6 mm or from 0.6 to 0.8 mm or from 0.8 to 1 mm.

[0065] As an implementation form, the thickness of the intumescent glass cloth layer 31 is greater than the thickness of the fireproof cloth layer; and / or, the thickness of the fire-resistant fabric layer 321 is greater than the thickness of the ceramifiable silicone rubber.

[0066] As an implementation form, the material of the energy-absorbing layer 2 includes at least one of silicone foam, polyurethane foam, melamine foam, expanded polypropylene, melamine phosphate, and neoprene; and the material of the fire-resistant fabric layer 321 includes at least one of glass fiber, basalt fiber, carbon fiber, and aluminum silicate fiber.

[0067] It can be understood that, in the fireproof blanket 1 of the embodiment of the present application, the materials of the energy-absorbing layer 2 and the fire-resistant fabric layer 321 are various, and different material selection adapts to various application scenarios and technical requirements, so as to ensure that the fireproof blanket 1 can be customized according to actual needs and meet different performance indicators.

[0068] Please refer to Figure 5 As an implementation form, the side of the energy-absorbing layer 2 away from the fireproof layer 3 or the side of the fireproof layer 3 away from the energy-absorbing layer 2 is provided with an adhesive layer 4 for fixing the fireproof blanket 1 to external equipment.

[0069] Please continue to refer to Figure 5 As an implementation form, the fireproof blanket 1 is further provided with a through hole 5 penetrating the energy-absorbing layer 2 and the fireproof layer 3, for realizing positioning or fixed cooperation of the fireproof blanket 1 with external equipment.

[0070] Please combine Figure 6 and Figure 7The utility model discloses a second embodiment further provides a kind of battery pack 10, including body 6 and the fire blanket 1 as described above, fire blanket 1 is located on body 6.

[0071] It can be understood that, because containing the above-mentioned fire blanket 1, the present battery pack 10 also has the beneficial effects consistent with the above-mentioned fire blanket 1, which will not be repeated here.

[0072] As an embodiment, the body 6 includes a housing 61 provided with an opening and a battery pack arranged in the housing 61, and the fire blanket 1 is arranged on the side of the battery pack close to the opening.

[0073] As an embodiment, the body 6 further includes a battery pack arranged in the housing 61, and the fire blanket 1 is arranged between the battery pack and the inner wall of the housing 61. It can be understood that the fire blanket 1 is arranged between the battery pack and the inner wall of the housing 61, which can effectively prevent the flame and high temperature from transferring from one battery cell to another battery cell when thermal runaway occurs, preventing the spread of fire.

[0074] As an embodiment, the battery pack includes at least two batteries 62, and the fire blanket 1 is arranged between the adjacent two batteries 62.

[0075] It can be understood that when thermal runaway occurs in a certain battery, the fire blanket 1 can effectively prevent the high temperature and flame from transferring to the adjacent battery, preventing chain reaction and ensuring the safety of other batteries.

[0076] Please refer to Figure 8 The utility model discloses a second embodiment further provides a kind of electric vehicle 100, including chassis and the battery pack 10 arranged on chassis, and the battery pack 10 includes body 6 and the fire blanket 1 as described above, and the fire blanket 1 is arranged between chassis and body 6.

[0077] It can be understood that, because containing the above-mentioned fire blanket 1, the present electric vehicle 100 also has the beneficial effects consistent with the above-mentioned fire blanket 1, which will not be repeated here.

[0078] As an embodiment, the body 6 includes a housing 61 provided with an opening and a battery pack arranged in the housing 61, and the fire blanket 1 is arranged on the side of the battery pack close to the opening.

[0079] Understandably, the electric vehicle 100 of the utility model embodiment, through the chassis cover is arranged at the opening of the shell 61, makes it serve as the upper cover of the battery pack 10 shell 61, reduces unnecessary structural member, thereby reduces the overall weight;After removing the additional upper cover, more internal space is released, so that the battery pack can be more compactly arranged, improve the volume utilization rate and energy density.The chassis not only provides physical protection to prevent external impact from causing damage to the battery pack, but also the fire blanket 1 is located between the chassis and the shell 61, further enhancing the protection capability against thermal runaway and other extreme conditions.

[0080] Compared with the prior art, the fire blanket, the battery pack and the electric vehicle provided by the utility model have the following advantages:

[0081] 1. The fire blanket provided by the utility model embodiment is applied to the battery pack, which can significantly improve the safety of the battery pack under extreme conditions such as fire and collision. The fire blanket provides an integrated solution through the energy-absorbing layer and the fireproof layer arranged in layers, which not only enhances the protection capability of the battery pack against thermal runaway and other extreme conditions, but also effectively reduces the vibration and noise during vehicle driving. The energy-absorbing layer can effectively reduce the vibration caused by the operation of components such as motors, improve the quietness and stability in the passenger compartment, and also isolate external noise to maintain the tranquility of the vehicle interior and improve the comfort experience of passengers. The fireproof layer is the core part of the fire blanket and is composed of an expanded glass fiber cloth layer and a composite fireproof cloth layer, which aims to provide efficient fire resistance and heat insulation performance. In the event of thermal runaway, the fireproof layer can effectively prevent the spread of flames to other areas and protect the passengers. Specifically, the expanded glass fiber cloth layer used in the fireproof layer has a very low thermal conductivity and almost no heat conduction, greatly reducing the possibility of heat transfer. At the same time, it provides good mechanical strength and dimensional stability, helping to maintain the structural integrity of the entire fireproof layer. In particular, the use of expanded glass fiber cloth layer in the fireproof layer is softer and easier to process, which can better adapt to different shapes and sizes. The composite fireproof cloth layer used in the fireproof layer can further enhance the fireproof and heat insulation performance of the fire blanket.

[0082] 2. In the composite fireproof cloth layer of the utility model embodiment, the fire-resistant fabric layer provides basic fire resistance and mechanical strength, ensuring that the fireproof layer can maintain structural integrity at high temperatures. The ceramicized silicone rubber layer has excellent fire resistance and flexibility, allowing it to work continuously in high-temperature environments while providing some sealing and cushioning. The layered arrangement of the two materials combines the advantages of both materials, enhancing the overall performance of the fireproof layer.

[0083] 3. The composite fireproof cloth layer of the utility model embodiment can be selected to be single-sided or double-sided according to design requirements to suit different application scenarios.

[0084] 4. The energy-absorbing layer and the fireproof layer fixing method of the embodiment of the utility model is various, can choose according to demand;Suture fixation ensures the firm connection between the two layers, especially suitable for the case of bearing larger tension or shear force;Adhesive fixation simplifies the production process, improves the production efficiency, and is suitable for the situation that needs to be installed or adjusted quickly;And the combination of the two can further enhance the connection stability between the energy-absorbing layer and the fireproof layer.

[0085] 5. In the fireproof blanket of the embodiment of the utility model, the energy-absorbing layer and the fireproof layer are integrally formed to ensure seamless connection between the two, eliminating the interface defects or weak points that may occur in the traditional layered structure;This not only improves the mechanical strength of the entire fireproof blanket, but also enhances its ability to resist external impact;Since there is no additional interface thermal resistance, heat can be transferred and dispersed more evenly, reducing the possibility of local overheating points. This helps better control the temperature rise rate and improve the overall fire resistance of the fireproof blanket.

[0086] 6. In the fireproof blanket of the embodiment of the utility model, the material selection of the energy-absorbing layer and the fire-resistant fabric layer is various, and different material selection adapts to various application scenarios and technical requirements, ensuring that the fireproof blanket can be customized according to actual needs to meet different performance indicators.

[0087] 7. The embodiment of the utility model also provides a battery pack, which contains the above-mentioned fireproof blanket, so the battery pack also has the same beneficial effects as the above-mentioned fireproof blanket, which will not be repeated here.

[0088] 8. The embodiment of the utility model also provides an electric vehicle, which contains the above-mentioned fireproof blanket, so the electric vehicle also has the same beneficial effects as the above-mentioned fireproof blanket, which will not be repeated here.

[0089] 9. The electric vehicle of the embodiment of the utility model, by setting the chassis cover at the opening of the shell, it serves as the upper cover of the battery pack shell, reducing unnecessary structural parts, thereby reducing the overall weight;After removing the additional upper cover, more internal space is released, so that the battery pack can be arranged more compactly, improving the volume utilization rate and energy density. The chassis not only provides physical protection to prevent external impact from damaging the battery pack, but also the fireproof blanket is located between the chassis and the shell, further enhancing the protection capability against thermal runaway and other extreme conditions.

[0090] The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model, any modification, equivalent replacement and improvement within the principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A fireproof blanket applied to a battery pack of an electric vehicle, characterized in that: The fireproof blanket comprises an energy-absorbing layer and a fireproof layer stacked together, and the fireproof layer comprises a bulk glass cloth layer and a composite fireproof cloth layer stacked together.

2. The fire blanket of claim 1, wherein: The composite fireproof cloth layer comprises a fire-resistant fabric layer and a ceramified silicone rubber layer stacked together.

3. The fire blanket of claim 2, wherein: One side of the fire-resistant fabric layer is provided with the ceramified silicone rubber layer; or both sides of the fire-resistant fabric layer are provided with the ceramified silicone rubber layer.

4. The fire blanket of claim 1, wherein: The energy-absorbing layer and the fireproof layer are fixed by sewing and / or are fixed by bonding.

5. The fire blanket of claim 1, wherein: The energy-absorbing layer and the fireproof layer are integrally formed in an integrated structure.

6. The fire blanket of claim 2, wherein: The thickness of the energy-absorbing layer ranges from 1 to 20 mm; and / or the thickness of the fireproof layer ranges from 0.5 to 5 mm; and / or the thickness of the bulk glass cloth ranges from 0.5 to 4 mm; and / or the thickness of the fire-resistant fabric layer ranges from 0.03 to 1 mm; and / or the thickness of the ceramified silicone rubber layer ranges from 0.02 to 1 mm; the thickness of the bulk glass cloth layer is greater than the thickness of the fireproof cloth layer; and / or the thickness of the fire-resistant fabric layer is greater than the thickness of the ceramified silicone rubber.

7. The fire blanket of claim 2, wherein: The material of the energy-absorbing layer comprises at least one of silicon foam, polyurethane foam, melamine foam, expanded polypropylene, melamine phosphate and neoprene; and the material of the fire-resistant fabric layer comprises at least one of glass fiber, basalt fiber, carbon fiber and aluminum silicate fiber.

8. A battery pack, characterized by: The fireproof blanket comprises an energy-absorbing layer and a fireproof layer stacked together, and the fireproof layer comprises a bulk glass cloth layer and a composite fireproof cloth layer stacked together.

9. An electric vehicle, characterized by: The composite fireproof cloth layer comprises a fire-resistant fabric layer and a ceramified silicone rubber layer stacked together.

10. The electric vehicle of claim 9, wherein: One side of the fire-resistant fabric layer is provided with the ceramified silicone rubber layer; or both sides of the fire-resistant fabric layer are provided with the ceramified silicone rubber layer. The energy-absorbing layer and the fireproof layer are fixed by sewing and / or are fixed by bonding. The energy-absorbing layer and the fireproof layer are integrally formed in an integrated structure. The thickness of the energy-absorbing layer ranges from 1 to 20 mm; and / or the thickness of the fireproof layer ranges from 0.5 to 5 mm; and / or the thickness of the bulk glass cloth ranges from 0.5 to 4 mm; and / or the thickness of the fire-resistant fabric layer ranges from 0.03 to 1 mm; and / or the thickness of the ceramified silicone rubber layer ranges from 0.02 to 1 mm; the thickness of the bulk glass cloth layer is greater than the thickness of the fireproof cloth layer; and / or the thickness of the fire-resistant fabric layer is greater than the thickness of the ceramified silicone rubber. The material of the energy-absorbing layer comprises at least one of silicon foam, polyurethane foam, melamine foam, expanded polypropylene, melamine phosphate and neoprene; and the material of the fire-resistant fabric layer comprises at least one of glass fiber, basalt fiber, carbon fiber and aluminum silicate fiber. The fireproof blanket comprises an energy-absorbing layer and a fireproof layer stacked together, and the fireproof layer comprises a bulk glass cloth layer and a composite fireproof cloth layer stacked together. The composite fireproof cloth layer comprises a fire-resistant fabric layer and a ceramified silicone rubber layer stacked together. One side of the fire-resistant fabric layer is provided with the ceramified silicone rubber layer; or both sides of the fire-resistant fabric layer are provided with the ceramified silicone rubber layer. The energy-absorbing layer and the fireproof layer are fixed by sewing and / or are fixed by bonding. The energy-absorbing layer and the fireproof layer are integrally formed in an integrated structure. The thickness of the energy-absorbing layer ranges from 1 to 20 mm; and / or the thickness of the fireproof layer ranges from 0.5 to 5 mm; and / or the thickness of the bulk glass cloth ranges from 0.5 to 4 mm; and / or the thickness of the fire-resistant fabric layer ranges from 0.03 to 1 mm; and / or the thickness of the ceramified silicone rubber layer ranges from 0.02 to 1 mm; the thickness of the bulk glass cloth layer is greater than the thickness of the fireproof cloth layer; and / or the thickness of the fire-resistant fabric layer is greater than the thickness of the ceramified silicone rubber.

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