Flexible lithium battery / interior fabric composite material for vehicle and preparation method of flexible lithium battery / interior fabric composite material

Abstract

The invention discloses an automotive flexible lithium battery / interior fabric composite material and a preparation method thereof, the material sequentially comprises a base cloth layer, a core layer, an insulating layer and a mask layer from inside to outside, and the material layers are bonded and compounded through adhesive layers; the core layer is composed of polytetrafluoroethylene hollow tubes which are arranged in parallel or are longitudinally and transversely interwoven into a fabric form, and fiber lithium battery assemblies are placed in the tubes. The flexible lithium battery / fabric composite material disclosed by the invention is suitable for interior plate blocks of cars, commercial vehicles and large buses, such as ceiling cloth, wall decoration cloth on two sides, trunks and the like where one or more layers of flexible lithium batteries need to be arranged, and is green and environment-friendly, so that green energy forms a maximum application scene, and huge social benefits and economic benefits are generated.

Description

Technical Field

[0001] The present invention belongs to the field of automobile manufacturing, and specifically is a flexible lithium battery / interior fabric composite material for automobiles and a preparation method thereof. The flexible lithium battery can replace the existing rigid block battery, and the composite material has the dual functions of energy storage and automobile interior fabric. Background Art

[0002] The battery is an indispensable part of the car. The traditional lead-acid battery is a relatively mature technology. Its biggest advantage is its long service life, but its fatal disadvantage is that it is large, heavy, and takes up space. The advantages of lithium-ion batteries are high energy density, small size, and light weight. The disadvantage is that they have self-discharge, which will cause power loss regardless of whether they are used or not. Currently, well-known domestic and foreign automobile manufacturers are committed to the research of power lithium battery vehicles, such as Ford in the United States, Toyota in Japan, Hyundai in South Korea, BYD, Geely, Chery, etc. in my country.

[0003] In addition to traditional batteries, some automobile manufacturers have also developed several new energy batteries, such as BYD's lithium iron phosphate battery, Samsung SDI's ternary lithium battery, GM's LG Chemical battery, Panasonic battery, etc. The above traditional batteries, including new energy batteries and lithium-ion batteries, are all rigid block batteries. Peng Huisheng's research team at Fudan University invented a flexible fiber-shaped lithium-ion battery, and the MIT team at the Massachusetts Institute of Technology developed a flexible lithium-ion battery with a thickness of microns and a length of 140m, and is expected to exceed 1000m in length, which can be used for self-powered fabrics.

[0004] A fuel cell is a power generation device that directly converts the chemical energy present in fuel and oxidant into electrical energy. Its main components include positive and negative electrodes and electrolytes.

[0005] Car interior fabrics include roof lining, door panels, seat fabrics, luggage racks, trunk linings and carpets. Depending on the brand and model of the car, the materials used are different. Fabrics generally include woven fabrics, knitted fabrics, non-woven fabrics and artificial leather.

[0006] At present, automotive interior fabric materials generally have defects such as poor flame retardancy, low strength, lack of artistry in decorative materials, poor compatibility with practicality, and some even use animal leather. Summary of the invention

[0007] The purpose of the present invention is to provide a flexible lithium battery / interior fabric composite material for a vehicle having the dual properties of a battery and an interior fabric, which can be prepared into interior fabrics such as roof interiors, door panels, trunk interiors, carpets, seat covers, etc., and also has charging and discharging functions.

[0008] The automotive flexible lithium battery / interior fabric composite material of the present invention includes a base fabric layer, a core layer, an insulating layer and a mask layer from the inside to the outside, and the material layers are bonded and composited by an adhesive layer. The core layer is composed of a polytetrafluoroethylene hollow hose arranged in parallel, such as longitudinally parallel (latitude-free type) or woven into a fabric (woven type) by longitudinal and transverse interweaving, and a fiber lithium battery assembly is placed in the tube, preferably a flexible fiber-shaped lithium-ion battery assembly, including a battery positive electrode, a negative electrode, an electrolyte, particles and a polymer. The core layer has the functions of charging, discharging and energy storage. The base fabric layer material is a flame-retardant nonwoven fabric, a recycled carbon fiber cloth, a recycled high-temperature filter fiber nonwoven fabric, a low-weight polyester mesh cloth, a plain cloth or a warp knitted cloth; the mask layer material is a flame-retardant polyester fiber warp knitted cloth, a flame-retardant polyester fiber nonwoven cloth, a fleece cloth or an artificial leather; the insulating layer material is styrene-butadiene rubber or a non-conductive fiber fabric.

[0009] The above-mentioned fiber lithium battery component is a flexible fiber-shaped lithium-ion battery component.

[0010] The polytetrafluoroethylene hose containing the flexible fiber-shaped lithium-ion battery assembly can be a single layer or multiple layers arranged longitudinally.

[0011] The core layer is composed of several polytetrafluoroethylene round hollow hoses arranged horizontally and orderly, and can be bonded in one or more layers in the longitudinal direction. The assembled fiber lithium battery components of corresponding lengths, such as positive and negative electrodes, electrolytes, particles and polymers, have been placed in the hollow tube, and all components are orderly integrated and fixed in position. The fiber lithium battery in the hose can not only be self-powered, discharged, and charged, and meet the requirements of portable electronic systems, but also have safety advantages such as impact resistance, collision resistance, and no rupture. The inner hole diameter of the polytetrafluoroethylene hollow tube is 0.5mm-0.8mm, the outer hole diameter is 0.8mm-1.0mm, the length is 50-1800cm, and the single layer thickness is 0.8-1.0mm. The core layer material has good sealing, high and low temperature resistance, corrosion resistance, flame retardancy, and no leakage effect. The polytetrafluoroethylene flexible tube is regularly integrated, with or without weft arrangement or woven arrangement. The non-weft arrangement is made by a special unidirectional composite process, and the woven arrangement is woven by a loom.

[0012] The adhesive is mainly used for compounding of multi-layer materials, including compounding of base fabric layer and core layer, compounding of core layer and insulating layer, and compounding of insulating layer and masking layer.

[0013] The adhesive can be selected from polyacrylate emulsion, polyurethane emulsion, aldehyde-based adhesive, water-based polyurethane adhesive, and modified amino adhesive, preferably polyacrylate or polyurethane emulsion. There are two bonding methods: full coating and foam coating. Full coating, the adhesive liquid is coated on the entire surface of the fabric layer; foam coating, the adhesive liquid is coated on the fabric surface in the form of foams of varying sizes, and the foams burst after being subjected to force, and the adhesive is bonded to the fabric layer in a discontinuous film, which has the advantage of reducing the unit mass of the composite material.

[0014] The full coating process is used, and the adhesive formula used is: 35-45% polyacrylate emulsion, 1-2% thickener, 1-2% cross-linking agent, 2-5% surface affinity agent, and the rest is water;

[0015] The foam coating process is used, and the adhesive formula used is: polyurethane emulsion 35-45%, titanium dioxide 8-12%, porcelain clay 8-12%, PF thickener 1-2%, crosslinking agent L1-2%, surface affinity agent P2-6%, Union TG5263 waterproof and oil-proof agent 0.5%, ammonia water 1-2%, thermosetting adhesive A651-20, 0.1-1%, and the rest is water. The above products are all commercially available.

[0016] The method for preparing the vehicle-use flexible lithium battery / interior fabric composite material of the present invention comprises the following steps:

[0017] 1. Selection of base fabric layer, insulation layer and mask layer;

[0018] 2. Preparation of core layer;

[0019] 3. Composite of multiple layers of materials.

[0020] In the above method, the base fabric layer, the insulating layer and the masking layer are selected according to the interior decoration design requirements of each vehicle model:

[0021] The base fabric layer material can be flame retardant nonwoven fabric (such as flame retardant spunbond or melt-bonded nonwoven fabric), recycled carbon fiber cloth, recycled high temperature filter fiber nonwoven fabric, low gram weight polyester mesh cloth, plain cloth and warp knitted cloth, etc., preferably high-strength polyester filament woven fabric, high temperature filter recycled fiber nonwoven fabric, recycled carbon fiber staple nonwoven fabric. The unit mass of the base fabric layer is 50-150g / m 2 , preferably 50-75g / m 2 .

[0022] The insulating layer can be styrene-butadiene rubber, non-conductive fiber fabric or styrene-butadiene rubber latex coating, preferably styrene-butadiene rubber layer. The unit mass of the insulating layer is 50-150g / m 2 , preferably 50-100g / m 2 .

[0023] The mask layer can be flame retardant polyester warp knitted fabric, flame retardant polyester nonwoven fabric, fleece fabric, artificial leather, etc., preferably flame retardant polyester fiber nonwoven fabric, flame retardant polyester warp knitted fabric. The unit mass of the mask layer is 50-200g / m 2 , preferably 50-150g / m 2 .

[0024] The core material can be designed according to the size of composite materials of different parts of different models, such as roof, trunk interior, door panel, and carpet. The preparation of the core layer can be based on the battery capacity, and the fiber lithium-ion battery of predetermined length can be placed in the polytetrafluoroethylene hose. The plane arrangement and the number of longitudinal arrangement layers of the polytetrafluoroethylene hose with the flexible lithium battery placed are designed. The plane arrangement of the polytetrafluoroethylene hose can be in various forms such as non-woven fabric type, woven fabric type, knitted fabric type, etc.

[0025] The preparation of the core layer material is specifically carried out according to the following steps:

[0026] a) placing the fiber lithium battery assembly into a polytetrafluoroethylene hose; the plane arrangement of the polytetrafluoroethylene hose is a non-woven fabric type, a woven fabric type or a knitted fabric type; the specific placing method is to wrap the outer layer of the assembled flexible fiber-shaped lithium-ion battery with a polytetrafluoroethylene thin strip, and then sinter it into a polytetrafluoroethylene hose.

[0027] b) Connection of fiber-shaped lithium battery: The positive and negative electrodes of the fiber lithium battery assembly at one end of the orderly arranged polytetrafluoroethylene hose are firmly welded with an ultrasonic welding machine, and the weld is sealed with polytetrafluoroethylene resin; the positive and negative electrodes are led out and connected to the front of the vehicle and the connecting strip respectively through the polytetrafluoroethylene hose, and the plug at the other end of the connecting strip is used for external power supply.

[0028] The composite of the multilayer material comprises the following steps:

[0029] On the composite machine, the base fabric layer, core layer, insulation layer and mask layer are bonded with adhesives, dried, shaped and cut into single-piece composite materials. The unit weight of the composite material is 200-500g / m 2 , preferably 300-450g / m 2 The width of the compound machine is 2.5m.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0031] The flexible lithium battery / interior fabric composite material prepared by the present invention can be applied to interior parts of cars, commercial vehicles and large buses, such as roof and trunk interiors, door panels, carpets and seat fabrics. The flexible fiber-shaped lithium battery encapsulated in the above interior parts can replace the rigid block battery, so that green energy forms the maximum application scenario and generates huge social and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the structure of a flexible lithium battery / interior fabric composite material for a vehicle;

[0033] In the figure, 1, base fabric layer, 2, adhesive layer, 3, core layer, 4, insulation layer, 5, masking layer.

[0034] Figure 2 It is a schematic diagram of the structure of a flexible fiber-shaped lithium battery;

[0035] In the figure, 6 is a polytetrafluoroethylene hose with encapsulated batteries, 7 is a positive electrode of the battery, and 8 is a negative electrode of the battery.

[0036] Figure 3 It is a round hollow polytetrafluoroethylene hose that encapsulates fiber lithium batteries;

[0037] In the figure, 9, a polytetrafluoroethylene hose for packaging batteries.

[0038] Figure 4 This is a schematic diagram of the non-woven arrangement of fiber lithium batteries;

[0039] In the figure, 10 is a non-woven fabric layer, and 11 is a polytetrafluoroethylene hose with a built-in flexible lithium battery.

[0040] Figure 5 This is a schematic diagram of the woven fabric arrangement of fiber flexible lithium batteries;

[0041] In the figure, 12, warp yarn of woven cloth.

[0042] Figure 6 This is a schematic diagram of the arrangement of fiber flexible lithium battery knitted fabric;

[0043] In the figure, 11, a polytetrafluoroethylene hose with a built-in flexible lithium battery, 13, a knitted cloth bundling yarn.

[0044] Figure 7 It is a schematic diagram of the structure of a composite machine for flexible lithium battery / interior fabric composite materials.

[0045] In the figure, 14, base cloth layer cloth winding roller, 15, insulation layer cloth winding roller, 16, mask layer cloth winding roller, 17, core layer conveyor chain, 18, first adhesive groove, 19, second adhesive groove, 20, third adhesive groove, 21, first double-roller rolling car, 22, second double-roller rolling car, 23, third double-roller rolling car, 24, heating and setting box, 25, first heating and setting roller, 26, second heating and setting roller, 27, third heating and setting roller, 28, fourth heating and setting roller, 29, fifth heating and setting roller, 30, fourth two-roller rolling car, 31, cooler, 32, finished product winding shaft, 33, adhesive liquid storage tank, 34, foam generator.

[0046] Specific embodiment

[0047] The embodiments of the present invention are described in more detail below with reference to the accompanying drawings. Although the embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0048] In the embodiment, the woven fabrics in the base fabric layer and the insulating layer, and the woven fabrics in the core layer are provided by Jiangsu Huayue Textile New Materials Technology Co., Ltd., the knitted fabrics are provided by Jiangsu Shuangshan Group, the non-woven fabric interior fabric is provided by Jiangsu Fluoromes Environmental Protection and Energy Saving New Materials Co., Ltd., the flexible fiber-shaped lithium battery adopts the patent embodiment product of application number 2022107896058, and the compound machine is provided by Jiangsu Hualong Compound Equipment Manufacturing Co., Ltd., model HL2201-230. The polytetrafluoroethylene round hollow hose, the isolation and packaging of the flexible lithium battery are purchased from Zhejiang Jiaxiang Fluoroplastic Co., Ltd.

[0049] Example 1

[0050] The preparation of a flexible lithium battery / interior fabric composite material for a car roof interior comprises the following steps:

[0051] 1. Preparation of base fabric layer, insulation layer and mask layer:

[0052] Base fabric layer: Fiber material: high-strength polyester filament, fineness 450dtex, weaving method: woven, fabric structure specifications: warp density 3 strands / cm, weft density 3 strands / cm, unit mass: 55g / m 2 , thickness 0.13mm, width 1.7m.

[0053] Insulation layer: Material: styrene-butadiene rubber, unit mass: 60g / m 2 , thickness 0.15mm, width 1.7m.

[0054] Mask layer: Fiber material: flame retardant polyethylene terephthalate, weaving method: conventional solution-dyed spunbond nonwoven hot pressed. Unit mass: 50g / m 2 , thickness 0.10mm, width 1.7m.

[0055] 2. Preparation of core layer:

[0056] The roof interior of a certain brand of car is 1.8m long, 1.7m wide and 3.2m in area. 2 , a 1.8m long, assembled flexible fiber-shaped lithium battery is wrapped with 3 layers of polytetrafluoroethylene thin strips with an orientation degree of 1.7 and a thickness of 0.1mm, with a coverage of 48%, and sintered at 327℃ to form a milky white opaque polytetrafluoroethylene hose with an inner diameter of 0.6mm and an outer diameter of 0.8mm. A total of 900 pieces, divided into two layers. It adopts the form of non-weft cloth, arranged in parallel along the length direction and bonded to a mass of 45g / m 2 The layers are bonded with adhesives on the spunbond nonwoven fabric. Core layer weight: 155g / m 2 , thickness 1.8mm, width 1.7m.

[0057] 3. Preparation of adhesive:

[0058] Adopt polyacrylate emulsion as adhesive. Use full coating process. Adhesive formula: polyacrylate emulsion 40%, thickener 1.5%, cross-linking agent 1.5%, surface affinity agent 2.5%, water 54.5%. Adhesive solid content 45%, adhesive layer mass 15g / m 2 , thickness 0.05mm.

[0059] 4. Composite of multi-layer materials:

[0060] The prepared base fabric layer, insulation layer and masking layer fabric rolls are placed in a composite machine (HL2201-230) Figure 7 ) at the cloth-winding roller positions 14, 15, and 16 of the laminating machine, the core layer material of 1.8 m long and 1.7 m wide prepared in the second step is placed on the conveyor belt 17 of the laminating machine, and the prepared adhesive liquid is placed in the adhesive liquid storage tank 33 and transported to the adhesive tanks 18, 19, and 20 through pipelines. The heating setting rollers 25, 26, and 27 in the heating setting box 24 are heated to 135°C, and the heating setting rollers 28 and 29 are heated to 165°C.

[0061] The back layer of the base fabric layer on the base fabric layer winding roller 14 is coated with adhesive liquid and compounded with the core layer on the conveyor belt through the double roller mill on the adhesive groove. The front side of the insulating layer on the insulating layer winding roller 15 is coated with adhesive liquid in the adhesive groove 19 and is compounded with the composite layer of the base fabric layer and the core layer at the double roller mill 21 for the second time. The mask layer on the winding roller 16 is coated with adhesive liquid on the back side through the adhesive groove 20 and is compounded with the three-layer composite material for the third time at the double roller mill 21. After compounding at the double roller mill 22, the multi-layer composite material enters the heating and setting box 24, is dried at the heating and setting rollers 25, 26, and 27, is shaped at the heating and setting rollers 28 and 29, is cooled at the cooler 31, and is wound into a shaft on the finished winding shaft 32.

[0062] Composite process conditions: vehicle speed 15m / min, two-roller rolling pressure 2MPa.

[0063] 5. Flexible fiber lithium battery / roof interior fabric performance test:

[0064] Composite material unit mass 365g / m 2 , width 1.7m, thickness 2.4mm, breaking strength: warp 980N / 5cm, weft 860N / 5cm, breaking elongation: warp 1.5%, weft 1.6%, flexible fiber lithium ion capacity 45mAh / root (length 1.8m), unit length fiber lithium ion capacity 25mAh / m, roof interior battery capacity 40.5Ah, meets the rated requirements of car battery capacity 32Ah-80Ah, Coulomb efficiency 99.5%.

[0065] Example 2

[0066] The preparation of a flexible lithium battery / interior fabric composite material for a commercial vehicle roof and trunk interior includes the following steps:

[0067] 1. Preparation of base fabric layer, insulation layer and mask layer:

[0068] Base fabric layer: Fiber material: high temperature filter material recycled fiber, weaving method: non-woven fabric, unit mass: 55g / m 2 , thickness 0.12mm, width 1.8m.

[0069] Insulation layer: Material: styrene-butadiene rubber, unit mass: 70g / m 2 , thickness 0.15mm, width 1.8m.

[0070] Mask layer: Fiber material: flame retardant polyester fiber, weaving method: polyester solution dyed spunbond nonwoven hot melt bonding. Unit weight: 60g / m 2 , thickness 0.12mm, width 1.8m.

[0071] 2. Preparation of core layer:

[0072] The roof interior of a certain brand of car is 3.3m long, 1.8m wide and 5.9m in area. 2 The trunk interior is 1.3m long, 1.8m wide and 2.4m in area. 2 The assembled flexible fiber-shaped lithium battery is coated with 3 layers of polytetrafluoroethylene thin strips with an orientation degree of 1.7 and a thickness of 0.1mm, with a coverage of 48%. It is sintered at 327℃ to form a milky white opaque polytetrafluoroethylene hose with an inner diameter of 0.65mm and an outer diameter of 0.8mm. There are 450 pieces in total. It is knitted into a warp knitted fabric, arranged in parallel along the length direction and bonded to a 45g / m 2 Spunbond nonwoven fabric. Core layer weight: 150g / m 2 , thickness 1.8mm, width 1.8m.

[0073] 3. Preparation of adhesive:

[0074] Water-based polyurethane emulsion is used as adhesive. Full coating process is adopted, and the adhesive formula is: 40% water-based polyurethane emulsion, 1.5% thickener, 1.5% cross-linking agent, 2.5% surface affinity agent, and 54.5% water.

[0075] Adhesive solid content 48%, adhesive layer unit mass 15g / m 2 , thickness 0.05mm.

[0076] 4. Composite of multi-layer materials:

[0077] The base fabric layer, insulation layer and masking layer rolls prepared in step 1 are placed in a laminating machine (HL2201-230) Figure 7 ) at the base cloth layer roll 14, the insulating layer roll 15, and the masking layer roll 16 positions, the core layer material of 3.3m long and 1.8m wide prepared in the second step is placed on the conveyor belt 17 of the laminating machine, the prepared adhesive liquid is placed in the storage tank 33, and is respectively transported to the first adhesive tank 18, the second adhesive tank 19, and the third adhesive tank 20 through the pipeline. The heating setting rollers 25, 26, and 27 in the heating setting box 24 are heated to 135°C, and the heating setting rollers 28 and 29 are heated to 165°C.

[0078] The back layer of the base fabric layer on the cloth roll 14 is coated with adhesive liquid through the double roller mill on the adhesive groove and compounded with the core layer on the conveyor belt. The front side of the insulating layer on the cloth roll 15 is coated with adhesive liquid in the adhesive groove 19 and compounded with the composite layer of the base fabric layer and the core layer at the double roller mill 21 for the second time. The flannel layer on the cloth roll 16 is coated with adhesive liquid on the back side through the adhesive groove 20 and compounded with the three-layer composite material for the third time at the double roller mill 22. After compounding at the double roller mill 22, the multi-layer composite material enters the heating and setting box 24, is dried at the heating and setting rollers 25, 26, and 27, is shaped at the heating and setting rollers 28 and 29, is cooled at the cooler 31, and is wound into a shaft on the finished winding shaft 32.

[0079] The same operating procedure was used to prepare a trunk lining composite material with a length of 1.3 m and a width of 1.8 m.

[0080] Composite process conditions: vehicle speed 15m / min, two-roller rolling pressure 2MPa.

[0081] 5. Flexible fiber lithium battery / roof and trunk interior fabric performance test:

[0082] Composite material unit mass 380g / m 2 , thickness 2.4mm, width 1.8m, breaking strength: warp 1020N / 5cm, weft 950N / 5cm, breaking elongation: warp 1.3%, weft 1.2%, flexible fiber lithium ion capacity is 81.2mAh (length 3.3m) and 32.0mAh (length 1.3m), fiber lithium ion capacity per unit length is 24.6mAh / m, the total capacity of the fabric battery lining the roof and trunk is 50Ah, which meets the rated capacity requirements of 32-52Ah for commercial vehicles, and the coulomb efficiency is 99.6%.

[0083] Embodiment 3;

[0084] The preparation of a flexible lithium battery / interior fabric composite material for a bus roof interior comprises the following steps:

[0085] 1. Preparation of base fabric layer, insulation layer and mask layer:

[0086] Base fabric layer: Fiber material: recycled carbon fiber staple fiber, weaving method: non-woven fabric, unit mass: 50g / m 2 , thickness 0.11mm, width 2.2m.

[0087] Insulation layer: Material: styrene-butadiene rubber, unit mass: 55g / m 2 , thickness 0.15mm, width 2.2m.

[0088] Mask layer: Fiber material: flame retardant colored polyester filament, weaving method: warp knitting. Unit weight: 50g / m 2 , thickness 0.13mm, width 2.2m.

[0089] 2. Preparation of core layer:

[0090] The roof interior of a certain brand of bus is 11.5m long, 2.2m wide and covers an area of ​​25.3m 2 , a length of 11.5m, assembled flexible fiber-shaped lithium battery is wrapped with 3 layers of polytetrafluoroethylene thin strips with an orientation degree of 1.7 and a thickness of 0.1mm, with a coverage of 48%, and sintered at 327℃ to form a milky white opaque polytetrafluoroethylene hose with an inner diameter of 0.65mm and an outer diameter of 0.8mm. A total of 250 pieces are divided into two layers. It adopts the form of non-weft cloth, arranged in parallel along the length direction and bonded to a mass of 45g / m 2 The layers are bonded with adhesives on the spunbond nonwoven fabric. Core layer weight: 155g / m 2 , thickness 1.8mm, width 2.2m.

[0091] 3. Preparation of adhesive:

[0092] Polyurethane emulsion is used as adhesive. In order to reduce the unit weight of the roof interior, the foam coating method is used to bond the multi-layer materials. The foam adhesive liquid formula is: polyurethane emulsion 42%, titanium dioxide 9%, porcelain clay 9%, PF thickener 1.2%, cross-linking agent L1.4%, surface affinity agent P2.2%, Union TG5263 waterproof and oil-proof agent 0.5%, ammonia water 0.3%, thermosetting adhesive A651-200.6%, water 32.6%. Foam density 30g / L, foaming ratio 1:5, foam diameter 0.1-5mm.

[0093] The solid content of the adhesive liquid is 48%, and the unit mass of the adhesive layer is 12g / m 2 , thickness 0.05mm.

[0094] 4. Composite of multi-layer materials:

[0095] The base fabric layer, insulation layer and masking layer prepared in step 1 are placed in a laminating machine of model HL2201-230 ( Figure 7 ) at the cloth roll shaft positions 14, 15, 16 of the laminating machine, place the core material of 11.5m long and 2.3m wide prepared in the second step on the conveyor belt 17 of the laminating machine, place the prepared adhesive liquid in the storage tank 33, pump it into the foam generator 34, and convey the formed foam adhesive liquid to the adhesive tanks 18, 19, 20 through pipelines, apply the adhesive liquid on the back, and perform the third compounding with the three-layer composite material on the double-roller mill 21. After compounding on the double-roller mill 22, the 25, 26, 27 hot rollers in the heating setting box 24 are heated to 135°C, and the heating setting rollers 28 and 29 are heated to 165°C. Start the laminating machine to 15m / min.

[0096] The back layer of the base fabric layer on the cloth roll 14 is coated with foam adhesive liquid through the double roller mill on the adhesive groove and compounded with the core layer on the conveyor belt. The front side of the insulating layer on the cloth roll 15 is coated with foam adhesive liquid in the adhesive groove 19 and compounded with the composite layer of the base fabric layer and the core layer at the double roller mill 21 for the second time. The flannel layer on the cloth roll 16 is coated with adhesive liquid on the back side through the adhesive groove 20 and compounded with the three-layer composite material for the third time at the double roller mill 22. After compounding at the double roller mill 23, the multi-layer composite material enters the heating and setting box 24, is dried at the heating and setting rollers 25, 26, and 27, is shaped at the heating and setting rollers 28 and 29, is cooled at the cooler 31, and is wound into a shaft on the finished winding shaft 32.

[0097] 5. Fiber lithium battery / roof interior fabric performance test:

[0098] Composite material unit mass 340g / m 2 , thickness 2.3mm, width 2.2m, breaking strength: warp 1240N / 5cm, weft 1100N / 5cm, breaking elongation: warp 1.3%, weft 1.2%, flexible fiber lithium ion capacity is 260mAh (length 11.5m), unit length fiber lithium ion capacity is 23.2mAh / m, roof interior fabric battery capacity is 60Ah, which meets the rated requirements of bus battery capacity of 40-60Ah, and Coulomb efficiency is 99.4%.

[0099] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A flexible lithium battery / automobile interior fabric composite material, Characterized in that, It successively includes a base fabric layer, a core layer, an insulating layer and a covering layer from the inside to the outside, and each material layer is adhesively compounded through an adhesive layer; the core layer is composed of polytetrafluoroethylene hollow tubes arranged in parallel or longitudinally and transversely interwoven into a fabric form, and fiber lithium battery components are placed inside the tubes; the base fabric layer material is flame-retardant non-woven fabric, recycled carbon fiber fabric, recycled high-temperature resistant filter fiber non-woven fabric, low-gram-weight polyester mesh fabric, plain cloth or warp knitted fabric; the covering layer material is flame-retardant polyester fiber warp knitted fabric, flame-retardant polyester fiber non-woven fabric, flannelette or artificial leather; the insulating layer material is styrene-butadiene rubber or non-conductive fiber fabric.

2. The flexible lithium battery / automobile interior fabric composite material according to claim 1, Characterized in that, The fiber lithium battery component is a flexible fibrous lithium ion battery component.

3. The flexible lithium battery / automobile interior fabric composite material according to claim 1, Characterized in that The core layer is composed of several polytetrafluoroethylene hollow tubes arranged horizontally in an orderly manner and longitudinally bonded in one or more layers; the inner hole diameter of the polytetrafluoroethylene hollow tube is 0.5mm - 0.8mm, the outer hole diameter is 0.8mm - 1.0mm, and the length is 50 - 1800cm.

4. The flexible lithium battery / automobile interior fabric composite material according to claim 1, Characterized in that The arrangement mode of the polytetrafluoroethylene hollow tubes is non-woven arrangement or woven arrangement. The non-woven arrangement is made through a one-way composite process, and the woven arrangement is woven through a loom.

5. The flexible lithium battery / automobile interior fabric composite material according to claim 1, Characterized in that The main component of the adhesive is one of polyacrylate emulsion, polyurethane emulsion, aldehyde-based adhesive, waterborne polyurethane adhesive, modified amino adhesive; preferably polyacrylate or polyurethane emulsion.

6. The flexible lithium battery / automobile interior fabric composite material according to claim 1, Characterized in that The adhesive formula: 35 - 45% of polyacrylate emulsion, 1 - 2% of thickener, 1 - 2% of crosslinking agent, 2 - 5% of surface affinity agent, and the rest is water; or 35 - 45% of polyurethane emulsion, 8 - 12% of titanium dioxide, 8 - 12% of kaolin, 1 - 2% of PF thickener, 1 - 2% of crosslinking agent L, 2 - 6% of surface affinity agent P, 0.5% of Younien TG5263 water and oil repellent, 1 - 2% of ammonia water, 0.1 - 1% of thermosetting glue A651 - 20, and the rest is water.

7. A preparation method of the flexible lithium battery / automobile interior fabric composite material according to claim 1, Characterized in that This method includes the following steps: 1) Selection of base fabric layer, insulating layer and covering layer materials; 2) Preparation of the core layer; 3) Compound of multi-layer materials.

8. The preparation method of the flexible lithium battery / automobile interior fabric composite material according to claim 7, Characterized in that: The base fabric layer is a flame-retardant non-woven fabric, recycled carbon fiber fabric, recycled high-temperature filter fiber non-woven fabric, low-gram-weight polyester mesh fabric, plain cloth or warp knitted fabric; preferably a high-strength polyester filament woven fabric, a high-temperature filter recycled regenerated fiber non-woven fabric, a recycled regenerated carbon fiber staple non-woven fabric; the unit mass of the base fabric layer is 50-150 g / m 2 , preferably 50-75 g / m 2 ; The described covering layer is a flame-retardant polyester fiber warp knitted fabric, a flame-retardant polyester fiber non-woven fabric, a flannelette or artificial leather; preferably a flame-retardant polyethylene terephthalate non-woven fabric, a flame-retardant polyester fiber non-woven fabric, a flame-retardant polyester filament warp knitted fabric; the unit mass of the covering layer is 50-200 g / m 2 , preferably 50-150 g / m 2 ; The insulating layer is a styrene-butadiene rubber layer, a non-conductive fiber fabric layer or a styrene-butadiene rubber emulsion coating; preferably a styrene-butadiene rubber layer; the unit mass of the insulating layer is 50-150 g / m 2 , preferably 50-100 g / m 2 .

9. The preparation method of the flexible lithium battery / automobile interior fabric composite material according to claim 7, Characterized in that, The preparation of the core layer material includes the following steps: a) Place the fiber lithium battery assembly into a polytetrafluoroethylene hose; the planar arrangement of the polytetrafluoroethylene hose is in the form of non-woven fabric, woven fabric or knitted fabric; b) Connection of the fiber lithium battery: Ultrasonically weld the positive and negative electrodes of the fiber lithium battery assembly at one end of the polytetrafluoroethylene hose that has been arranged in an orderly manner, and encapsulate the welded joint with polytetrafluoroethylene resin; lead out the positive and negative electrodes, and respectively lead them to the front of the vehicle and connect to the connecting bar through the polytetrafluoroethylene hose. The plug at the other end of the connecting bar is used for external power supply.

10. The preparation method of the flexible lithium battery / inner decoration fabric composite material for vehicles according to claim 7, characterized in that, the composite of the multi-layer material comprises the following steps: Bond the base fabric layer, core layer, insulating layer and facing layer materials in sequence with an adhesive, dry them, shape them, and cut them into single-piece composite materials. The unit mass of the composite materials is 200 - 500 g / m 2 , preferably 300 - 450 g / m 2 .

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