Battery insulating plate

Abstract

The utility model discloses a battery insulating plate, and belongs to the technical field of new energy. The battery insulating plate comprises a first flame-retardant composite material layer, a first flame-retardant film, woven fiber cloth, a second flame-retardant film and a second flame-retardant composite material layer which are sequentially laminated in the thickness direction of the battery insulating plate. According to the utility model, the structural design is reasonable, and the first flame-retardant composite material layer, the first flame-retardant film, the woven fiber cloth, the second flame-retardant film and the second flame-retardant composite material layer are sequentially laminated, so that the light weight is realized, and the insulating plate has good flame-retardant property and excellent insulating property; the impact resistance and corrosion resistance of the insulating plate can be effectively improved, so that the insulating plate is firmer in structure, resistant to high-temperature and high-pressure impact, not prone to cracking, suitable for being processed and manufactured into a protective shell of a battery module and capable of well supporting and fixing the battery module.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, in particular to a battery insulation plate. Background Art

[0002] With the continuous expansion of the new energy vehicle market and the increasing popularity of electric vehicles, the importance of power batteries has become increasingly prominent. The power battery module is one of the important components of the entire power battery. It is a complex system composed of multiple structures. The stability and reliability of each component directly affect the performance of the entire battery module. Its stability and reliability are related to the range and service life of new energy vehicles. The shell is the protective shell of the battery module, which is usually required to have functions such as fireproof, waterproof, and anti-corrosion. It can also support and fix the battery module. The quality and structure of the shell have an important impact on the safety and service life of the battery module.

[0003] At present, the existing battery shells use unreasonable plate structure design, with defects such as high brittleness, easy cracking, heavy weight, etc. For example, a single-layer metal plate is heavy and not insulated; a single-layer mica plate is used as a flame retardant layer, which has problems such as high weight, high brittleness, poor impact resistance, and easy cracking.

[0004] In view of this, this application is filed. Utility Model Content

[0005] The utility model aims to overcome the shortcomings of the prior art and provide a battery insulation plate, which is light in weight, excellent in insulation and impact resistance, and not prone to cracking.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A battery insulating plate comprises a first flame-retardant composite material layer, a first flame-retardant film, a woven fiber cloth, a second flame-retardant film and a second flame-retardant composite material layer which are sequentially stacked in a thickness direction thereof; the first flame-retardant composite material layer comprises a first flame-retardant thermoplastic resin plate and a first fiber-reinforced thermoplastic resin composite material plate, and the second flame-retardant composite material layer comprises a second flame-retardant thermoplastic resin plate and a second fiber-reinforced thermoplastic resin composite material plate.

[0008] The insulating board of the utility model has a reasonable structural design. By sequentially stacking a first flame retardant composite material layer, a first flame retardant film, a woven fiber cloth, a second flame retardant film and a second flame retardant composite material layer, it can not only achieve lightweight and make the insulating board have good flame retardant properties and excellent insulation, but also effectively improve the impact resistance and corrosion resistance of the insulating board, making the structure of the insulating board more solid, resistant to high temperature and high pressure impact, and not easy to crack. It is suitable for being processed into a protective shell of a battery module and can well support and fix the battery module.

[0009] As a preferred embodiment of the present invention, the number of layers of the first flame-retardant thermoplastic resin plate is 1 to 10, the number of layers of the first fiber-reinforced thermoplastic resin composite plate is 1 to 10, and the first flame-retardant thermoplastic resin plate and the first fiber-reinforced thermoplastic resin composite plate are alternately stacked along the thickness direction of the first flame-retardant composite layer.

[0010] As a preferred embodiment of the present invention, the thickness of the first fiber reinforced thermoplastic resin composite material plate is 0.1-1 mm.

[0011] As a preferred embodiment of the present invention, the thickness of the first flame-retardant thermoplastic resin plate is 0.1-1 mm.

[0012] As a preferred embodiment of the present invention, the number of layers of the second flame-retardant thermoplastic resin plate is 1 to 10, the number of layers of the second fiber-reinforced thermoplastic resin composite plate is 1 to 10, and the second flame-retardant thermoplastic resin plate and the second fiber-reinforced thermoplastic resin composite plate are alternately stacked along the thickness direction of the second flame-retardant composite layer.

[0013] As a preferred embodiment of the present invention, the thickness of the second fiber reinforced thermoplastic resin composite material plate is 0.1-1 mm.

[0014] As a preferred embodiment of the present invention, the thickness of the second flame-retardant thermoplastic resin plate is 0.1-1 mm.

[0015] As a preferred embodiment of the present invention, the thickness of the first flame retardant film is 0.1-1 mm.

[0016] As a preferred embodiment of the present invention, the thickness of the second flame retardant film is 0.1-1 mm.

[0017] As a preferred embodiment of the present invention, the thickness of the woven fiber cloth is 0.1-2 mm.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The insulating board of the utility model has a reasonable structural design. By sequentially stacking a first flame retardant composite material layer, a first flame retardant film, a woven fiber cloth, a second flame retardant film and a second flame retardant composite material layer, it not only achieves lightweight and makes the insulating board have good flame retardant properties and excellent insulation, but also can effectively improve the impact resistance and corrosion resistance of the insulating board, making the structure of the insulating board more solid, resistant to high temperature and high pressure impact, and not easy to crack. It is suitable for being processed into a protective shell of a battery module and can well support and fix the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a battery insulation plate provided in one embodiment of the utility model;

[0021] Figure 2 A schematic structural diagram of a battery insulation plate provided in another embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the fiber layer provided by the utility model.

[0023] In the figure, 1-first flame retardant composite material layer, 11-first flame retardant thermoplastic resin plate, 12-first fiber reinforced thermoplastic resin composite material plate, 2-first flame retardant film, 3-woven fiber cloth, 4-second flame retardant film, 5-second flame retardant composite material layer, 51-second flame retardant thermoplastic resin plate, 52-second fiber reinforced thermoplastic resin composite material plate. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0025] See also Figures 1-2 The utility model provides a battery insulation board, including a first flame retardant composite material layer 1, a first flame retardant film 2, a woven fiber cloth 3, a second flame retardant film 4 and a second flame retardant composite material layer 5 which are stacked in sequence in the thickness direction thereof, the first flame retardant composite material layer 1 includes a first flame retardant thermoplastic resin plate 11 and a first fiber reinforced thermoplastic resin composite material plate 12, the second flame retardant composite material layer 5 includes a second flame retardant thermoplastic resin plate 51 and a second fiber reinforced thermoplastic resin composite material plate 52.

[0026] The insulating board of the utility model has a reasonable structural design. By sequentially stacking a first flame retardant composite material layer 1, a first flame retardant film 2, a woven fiber cloth 3, a second flame retardant film 4 and a second flame retardant composite material layer 5, it not only achieves lightweight and makes the insulating board have good flame retardant properties and excellent insulation, but also can effectively improve the impact resistance and corrosion resistance of the insulating board, making the structure of the insulating board more solid, resistant to high temperature and high pressure impact, and not easy to crack. It is suitable for being processed into a protective shell of a battery module and can well support and fix the battery module.

[0027] In one embodiment, the number of layers of the first flame retardant thermoplastic resin plate 11 is 1 to 10, for example, 1, 2, 3, 4, 5, 6, 8, 10 or a range consisting of any two values ​​therein.

[0028] The number of layers of the first fiber reinforced thermoplastic resin composite material plate 12 is 1 to 10 layers, for example, it can be 1 layer, 2 layers, 3 layers, 4 layers, 5 layers, 6 layers, 8 layers, 10 layers or a range consisting of any two values ​​therein; the first flame retardant thermoplastic resin plate 11 and the first fiber reinforced thermoplastic resin composite material plate 12 are alternately stacked along the thickness direction of the first flame retardant composite material layer 1.

[0029] Specifically, the thickness of the first flame retardant thermoplastic resin plate 11 is 0.1-1 mm, for example, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm or a range consisting of any two values ​​therein.

[0030] Specifically, the thickness of the first fiber reinforced thermoplastic resin composite material plate 12 is 0.1-1 mm, for example, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm or a range consisting of any two values ​​therein.

[0031] In one embodiment, the number of layers of the second flame retardant thermoplastic resin plate 51 is 1 to 10, for example, 1, 2, 3, 4, 5, 6, 8, 10 or a range consisting of any two values ​​therein.

[0032] The number of layers of the second fiber reinforced thermoplastic resin composite material plate 52 is 1 to 10 layers, for example, it can be 1 layer, 2 layers, 3 layers, 4 layers, 5 layers, 6 layers, 8 layers, 10 layers or a range consisting of any two values ​​therein; the second flame retardant thermoplastic resin plate 51 and the second fiber reinforced thermoplastic resin composite material plate 52 are alternately stacked along the thickness direction of the second flame retardant composite layer 5.

[0033] Specifically, the thickness of the second flame retardant thermoplastic resin plate 51 is 0.1-1 mm, for example, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm or a range consisting of any two of these values.

[0034] Specifically, the thickness of the second fiber reinforced thermoplastic resin composite material plate 52 is 0.1-1 mm, for example, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm or a range consisting of any two of these values.

[0035] The utility model alternately stacks the first fiber reinforced thermoplastic resin composite material plate 12 and the first flame retardant thermoplastic resin plate 11, and alternately stacks the second fiber reinforced thermoplastic resin composite material plate 52 and the second flame retardant thermoplastic resin plate 51, which can further improve the heat insulation and flame retardancy of the insulation board, and the layers can effectively absorb impact energy, effectively improving the impact resistance of the insulation board.

[0036] In one embodiment, the thickness of the first flame retardant film 2 is 0.1-1 mm, for example, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm or a range consisting of any two values ​​therein.

[0037] In one embodiment, the thickness of the second flame retardant film 4 is 0.1-1 mm, for example, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm or a range consisting of any two values ​​therein.

[0038] In one embodiment, the woven fiber cloth 3 has a thickness of 0.1-2 mm, for example, 0.1 mm, 0.3 mm, 0.5 mm, 0.7 mm, 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2 mm or a range consisting of any two of these values.

[0039] Specifically, the woven fiber cloth 3 is a satin fiber cloth, which can give the insulation board a higher impact strength.

[0040] In one embodiment, the first fiber-reinforced thermoplastic resin composite material plate 12 and the second fiber-reinforced thermoplastic resin composite material plate 52 are composed of continuous fibers and thermoplastic resin.

[0041] Specifically, the mass fraction of continuous fibers in the first fiber reinforced thermoplastic resin composite plate 12 is 25 to 50%, for example, it can be 25%, 30%, 35%, 40%, 45%, 50% or a range consisting of any two of the values; the mass fraction of continuous fibers in the second fiber reinforced thermoplastic resin composite plate 52 is 25 to 50%, for example, it can be 25%, 30%, 35%, 40%, 45%, 50% or a range consisting of any two of the values.

[0042] Specifically, the continuous fibers in the first fiber reinforced thermoplastic resin composite plate 12 and the continuous fibers in the second fiber reinforced thermoplastic resin composite plate 52 are the same or different continuous fibers, and the continuous fibers may be alkali-free glass fibers, medium-alkali glass fibers, high-alkali glass fibers, carbon fibers, aramid fibers, basalt fibers or silicon carbide fibers.

[0043] Specifically, the thermoplastic resin in the first fiber reinforced thermoplastic resin composite material plate 12 and the thermoplastic resin in the second fiber reinforced thermoplastic resin composite material plate 52 are the same or different thermoplastic resins, and the thermoplastic resins may be polyethylene, polypropylene, polyethylene recycled material or polypropylene recycled material.

[0044] In the present invention, the first flame retardant film 2 and the second flame retardant film 4 are both existing flame retardant film materials. Optionally, the first flame retardant film 2 is composed of 15-25% flame retardant, 75-85% thermoplastic resin and other additives 0-10%, and the second flame retardant film 4 is composed of 15-25% flame retardant, 75-85% thermoplastic resin and other additives 0-10%, and the other additives in the first flame retardant film 2 and the second flame retardant film 4 are preferably free of glass fiber.

[0045] In one embodiment, the first flame retardant thermoplastic resin sheet 11 and the second flame retardant thermoplastic resin sheet 51 are composed of continuous fibers and flame retardant thermoplastic resin.

[0046] Specifically, the mass fraction of the continuous fibers in the first flame retardant thermoplastic resin plate 11 is 40-70%, for example, it can be 40%, 45%, 50%, 55%, 60%, 70%, 75%, 80% or a range consisting of any two of the values; the mass fraction of the continuous fibers in the second flame retardant thermoplastic resin plate 51 is 40-70%, for example, it can be 40%, 45%, 50%, 55%, 60%, 70%, 75%, 80% or a range consisting of any two of the values.

[0047] The utility model limits the content of continuous fibers and resins contained in each layer, so that the first flame-retardant composite material layer 1 and the second flame-retardant composite material layer 5 are lighter and have excellent impact resistance.

[0048] In the present invention, the flame-retardant thermoplastic resin in the first flame-retardant thermoplastic resin plate 11 and the flame-retardant thermoplastic resin in the second flame-retardant thermoplastic resin plate 51 are both existing materials. Optionally, the flame-retardant thermoplastic resin in the first flame-retardant thermoplastic resin plate 11 is composed of 25-40% flame retardant, 60-75% thermoplastic resin and 0-10% auxiliary agent; the flame-retardant thermoplastic resin in the second flame-retardant thermoplastic resin plate 51 is composed of 25-40% flame retardant, 60-75% thermoplastic resin and 0-10% auxiliary agent; the auxiliary agent may be an antioxidant or a lubricant.

[0049] The flame retardant in the first flame retardant thermoplastic resin plate 11, the flame retardant in the second flame retardant thermoplastic resin plate 51, the flame retardant in the first flame retardant film 2 and the flame retardant in the second flame retardant film 4 are the same or different flame retardants, and the flame retardant can be a halogen-free flame retardant or a halogen-based flame retardant, preferably a halogen-free flame retardant; the halogen-free flame retardant is selected from at least one of an inorganic phosphorus-based flame retardant, an organic phosphorus-based flame retardant, a nitrogen-based flame retardant, a magnesium-aluminum flame retardant, and a composite intumescent flame retardant. For example, the inorganic phosphorus flame retardant can be disodium hydrogen phosphate, lithium phosphate, sodium phosphate, diammonium hydrogen phosphate, antimony phosphate or ammonium polyphosphate; the organic phosphorus flame retardant can be a phosphite flame retardant, a phosphate flame retardant or a heterocyclic organic phosphorus flame retardant; the nitrogen flame retardant can be melamine or melamine cyanuric acid (MCA); the magnesium-aluminum flame retardant can be magnesium hydroxide or aluminum hydroxide; the composite intumescent flame retardant can be an IFR-CFA halogen-free intumescent composite flame retardant.

[0050] The thermoplastic resin in the first flame retardant thermoplastic resin plate 11, the thermoplastic resin in the second flame retardant thermoplastic resin plate 51, the thermoplastic resin in the first flame retardant film 2 and the thermoplastic resin in the second flame retardant film 4 are the same or different thermoplastic resins, and the thermoplastic resins may be polyethylene, polypropylene, polyethylene recycled material or polypropylene recycled material.

[0051] In one embodiment, the layers of the insulating plate are formed by a conventional hot pressing process.

[0052] The following examples are provided to facilitate understanding of the present invention. These examples are not provided to limit the scope of the claims.

[0053] Example 1

[0054] See also Figure 2 , this embodiment provides a battery insulation board, comprising a first flame retardant composite material layer 1, a first flame retardant film 2, a woven fiber cloth 3, a second flame retardant film 4 and a second flame retardant composite material layer 5 which are stacked in sequence;

[0055] The first flame-retardant composite material layer 1 includes a first flame-retardant thermoplastic resin plate 11 and a first fiber-reinforced thermoplastic resin composite material plate 12. The number of layers of the first flame-retardant thermoplastic resin plate 11 and the number of layers of the first fiber-reinforced thermoplastic resin composite material plate 12 are both 2 layers. The first flame-retardant thermoplastic resin plate 11 and the first fiber-reinforced thermoplastic resin composite material plate 12 are alternately laminated along the thickness direction of the first flame-retardant composite material layer 1. The thickness of the first flame-retardant thermoplastic resin plate 11 is 0.25 mm, and the thickness of the first fiber-reinforced thermoplastic resin composite material plate 12 is 0.15 mm.

[0056] The second flame-retardant composite material layer 5 includes a second flame-retardant thermoplastic resin plate 51 and a second fiber-reinforced thermoplastic resin composite plate 52. The number of layers of the second flame-retardant thermoplastic resin plate 51 and the number of layers of the second fiber-reinforced thermoplastic resin composite plate 52 are both 2 layers. The second flame-retardant thermoplastic resin plate 51 and the second fiber-reinforced thermoplastic resin composite plate 52 are alternately laminated along the thickness direction of the second flame-retardant composite material layer 5. The second flame-retardant thermoplastic resin plate 51 is located between the second fiber-reinforced thermoplastic resin composite plate 52 and the second flame-retardant film 4. The thickness of the second flame-retardant thermoplastic resin plate 51 is 0.25 mm, and the thickness of the second fiber-reinforced thermoplastic resin composite plate 52 is 0.15 mm.

[0057] The first flame retardant thermoplastic resin plate 11 and the second flame retardant thermoplastic resin plate 51 are both composited by continuous glass fiber and thermoplastic flame retardant resin through an existing melt impregnation process, wherein the mass fraction of the continuous fiber is 50%; the thermoplastic flame retardant resin is composed of 35% flame retardant and 65% copolymerized polypropylene resin;

[0058] The first fiber-reinforced thermoplastic resin composite material plate 12 and the second fiber-reinforced thermoplastic resin composite material plate 52 are compounded by continuous glass fibers and copolymerized polypropylene resin through an existing melt impregnation process, wherein the mass fraction of the continuous fibers is 40%;

[0059] The horizontal X axis is 0° (such as Figure 3 In the direction of the X-axis in the first flame retardant thermoplastic resin plate 11, the plying angle of the continuous fibers is 90°, and the plying angle of the continuous fibers in the first fiber reinforced thermoplastic resin composite plate 12 is 0°; in the second flame retardant thermoplastic resin plate 51, the plying angle of the continuous fibers is 90°, and the plying angle of the continuous fibers in the second fiber reinforced thermoplastic resin composite plate 52 is 0°.

[0060] The thickness of the first flame retardant film 2 is 0.15 mm; the thickness of the second flame retardant film 4 is 0.15 mm; the first flame retardant film 2 and the second flame retardant film 4 are both composed of 35% flame retardant and 65% copolymerized polypropylene resin.

[0061] The woven fiber cloth 3 is a satin fiber cloth, and the thickness of the woven fiber cloth 3 is 1 mm.

[0062] The flame retardant used in this embodiment is IFR-CFA halogen-free intumescent composite flame retardant, and the continuous fiber used in this embodiment is continuous alkali-free glass fiber.

[0063] Example 2

[0064] This embodiment provides a battery insulation plate. The difference between this embodiment and embodiment 1 is that:

[0065] In this embodiment, the number of layers of the first flame-retardant thermoplastic resin plate 11 and the number of layers of the first fiber-reinforced thermoplastic resin composite material plate 12 are both one layer, the thickness of the first flame-retardant thermoplastic resin plate 11 is 1 mm, and the thickness of the first fiber-reinforced thermoplastic resin composite material plate 12 is 1 mm;

[0066] The number of layers of the second flame-retardant thermoplastic resin plate 51 and the number of layers of the second fiber-reinforced thermoplastic resin composite material plate 52 are both one layer, the thickness of the second flame-retardant thermoplastic resin plate 51 is 1 mm, and the thickness of the second fiber-reinforced thermoplastic resin composite material plate 52 is 1 mm;

[0067] The thickness of the first flame retardant film 2 is 1 mm; the thickness of the second flame retardant film 4 is 1 mm;

[0068] The woven fiber cloth 3 is a satin fiber cloth, and the thickness of the woven fiber cloth 3 is 2 mm.

[0069] Example 3

[0070] This embodiment provides a battery insulation plate. The difference between this embodiment and embodiment 1 is that:

[0071] In this embodiment, the number of layers of the first flame-retardant thermoplastic resin plate 11 and the number of layers of the first fiber-reinforced thermoplastic resin composite material plate 12 are both 10 layers, the thickness of the first flame-retardant thermoplastic resin plate 11 is 0.1 mm, and the thickness of the first fiber-reinforced thermoplastic resin composite material plate 12 is 0.1 mm;

[0072] The number of layers of the second flame-retardant thermoplastic resin plate 51 and the number of layers of the second fiber-reinforced thermoplastic resin composite material plate 52 are both 10 layers, the thickness of the second flame-retardant thermoplastic resin plate 51 is 0.1 mm, and the thickness of the second fiber-reinforced thermoplastic resin composite material plate 52 is 0.1 mm;

[0073] The thickness of the first flame retardant film 2 is 0.1 mm; the thickness of the second flame retardant film 4 is 0.1 mm;

[0074] The woven fiber cloth 3 is a satin fiber cloth, and the thickness of the woven fiber cloth 3 is 0.1 mm.

[0075] Performance Testing

[0076] The insulation board of the above embodiment was subjected to the following performance tests:

[0077] (1) Insulation test: Cut the insulation board into samples of 100 mm*100 mm and test the samples with an insulation resistance tester in accordance with IEC 60243-1:2013. The test conditions are: voltage 1000 V, direct current, power-on time 60 s; the qualified standard is: volume resistance ≥ 500 MΩ.

[0078] (2) Impact resistance test: The insulation board was cut into 500 mm*500 mm samples. The test conditions were: 50 J impact energy, 25 mm ball head, frontal impact. The test operation steps were based on ASTM D7136-D7136M standards.

[0079] The test results are shown in Table 1 below.

[0080] Table 1

[0081]

[0082] It can be seen from Table 1 that the insulating board provided by the utility model has excellent insulation and impact resistance.

[0083] In the present invention, when it comes to numerical ranges, unless otherwise specified, the above numerical ranges are deemed to be continuous and include the minimum and maximum values ​​of the range, as well as each value between the minimum and maximum values. Further, when a range refers to an integer, each integer between the minimum and maximum values ​​of the range is included. In addition, when multiple ranges are provided to describe features or characteristics, the ranges can be merged. In other words, unless otherwise specified, all ranges disclosed in the present invention should be understood to include any and all sub-ranges included therein.

[0084] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0085] In the description of the present invention, it should be understood that the terms "upper", "lower", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0086] Unless otherwise specified, the materials used in the present invention are all commercially available materials.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the protection scope of the utility model. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A battery insulation plate, characterized in that: It includes a first flame retardant composite material layer, a first flame retardant film, a woven fiber cloth, a second flame retardant film and a second flame retardant composite material layer which are stacked in sequence in the thickness direction; the first flame retardant composite material layer includes a first flame retardant thermoplastic resin plate and a first fiber reinforced thermoplastic resin composite material plate, and the second flame retardant composite material layer includes a second flame retardant thermoplastic resin plate and a second fiber reinforced thermoplastic resin composite material plate.

2. The battery insulation plate according to claim 1, characterized in that: The number of layers of the first flame-retardant thermoplastic resin plate is 1 to 10, and the number of layers of the first fiber-reinforced thermoplastic resin composite material plate is 1 to 10, and the number of layers of both is the same. The first flame-retardant thermoplastic resin plate and the first fiber-reinforced thermoplastic resin composite material plate are alternately stacked along the thickness direction of the first flame-retardant composite material layer.

3. The battery insulation plate according to claim 1, characterized in that: The thickness of the first fiber-reinforced thermoplastic resin composite material plate is 0.1-1 mm.

4. The battery insulation plate according to claim 1, characterized in that: The thickness of the first flame-retardant thermoplastic resin plate is 0.1-1 mm.

5. The battery insulation plate according to claim 1, characterized in that: The number of layers of the second flame-retardant thermoplastic resin plate is 1 to 10, and the number of layers of the second fiber-reinforced thermoplastic resin composite plate is 1 to 10, and the number of layers of both is the same. The second flame-retardant thermoplastic resin plate and the second fiber-reinforced thermoplastic resin composite plate are alternately stacked along the thickness direction of the second flame-retardant composite layer.

6. The battery insulation plate according to claim 1, characterized in that: The thickness of the second fiber-reinforced thermoplastic resin composite material plate is 0.1-1 mm.

7. The battery insulation plate according to claim 1, characterized in that: The thickness of the second flame-retardant thermoplastic resin plate is 0.1-1 mm.

8. The battery insulation plate according to claim 1, characterized in that: The thickness of the first flame retardant film is 0.1-1 mm.

9. The battery insulation plate according to claim 1, characterized in that: The thickness of the second flame retardant film is 0.1-1 mm.

10. The battery insulation plate according to claim 1, characterized in that: The thickness of the woven fiber cloth is 0.1-2 mm.

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