CN216635470U

CN216635470U - Continuous fiber reinforced thermoplastic battery shell

Info

Publication number: CN216635470U
Application number: CN202123061242.6U
Authority: CN
Inventors: 朱华平; 李要山; 翟祖龙; 田宇飞
Original assignee: Jiangsu Yitong Composite Material Co ltd
Current assignee: Jiangsu Yitong Composite Material Co ltd
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-05-31
Anticipated expiration: 2031-12-07

Abstract

The utility model relates to a continuous fiber reinforced thermoplastic battery case comprising: the mounting edge is positioned on the periphery of the shell, the mounting holes are uniformly distributed on the mounting edge, and the concave-convex structure is positioned in the middle of the shell; the shell at least comprises an outer layer, an intermediate layer and an inner layer from the outer surface to the inner part, and the adjacent two layers are fused, hot-pressed and compounded; the outer layer, the middle layer and the inner layer are of a continuous fiber reinforced thermoplastic resin pre-impregnated woven fabric, a continuous fiber resin reinforced thermoplastic resin mixed woven fabric or a continuous fiber reinforced thermoplastic pre-impregnated material melt hot-pressing composite structure. The shell of the utility model has high strength, light weight, corrosion resistance, moisture resistance, smooth appearance and relatively low cost. The continuous fiber support shell structure does not deform in the combustion process, and is safe and reliable.

Description

Continuous fiber reinforced thermoplastic battery shell

Technical Field

The utility model relates to the field of composite materials, in particular to a continuous fiber reinforced thermoplastic battery shell.

Background

The continuous fiber reinforced thermoplastic material has the characteristics of light weight, high strength, heat insulation and the like, and is more and more widely applied to the field of composite materials, the traditional battery pack composite cover plate is made of glass fiber reinforced plastic materials or stainless steel materials, but the preparation process of the glass fiber reinforced plastic is not environment-friendly, and the glass fiber reinforced plastic cannot be recycled after being formed; the traditional steel has high specific gravity and cannot meet the light-weight requirement of new energy automobiles. And the current SMC product is thicker, the surface is not easy to control, the injection molding shell of the short fiber and the LFT long fiber has thicker thickness and heavier weight, and the PCM process has higher preparation price.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects and shortcomings of the prior art, the utility model provides the continuous fiber reinforced thermoplastic battery shell which is simple in structure, light in weight, high in strength, corrosion-resistant, moisture-proof and recyclable, and is particularly suitable for impact resistance protection of a new energy battery pack.

In order to achieve the purpose of the utility model, the utility model adopts the following technical scheme:

a continuous fiber reinforced thermoplastic battery case comprising: the mounting edge is positioned on the periphery of the shell, the mounting holes are uniformly distributed on the mounting edge, and the concave-convex structure forms a shell main body; the shell at least comprises an outer layer, a middle layer and an inner layer from the outer surface to the inner part, and the adjacent two layers are fused, hot-pressed and compounded; the outer layer, the intermediate layer and the inner layer are continuous fiber reinforced thermoplastic resin pre-impregnated woven cloth, continuous fiber resin reinforced thermoplastic resin mixed woven cloth or continuous fiber reinforced thermoplastic prepreg which are mutually compounded by melting and hot pressing; the mass content of the fibers of the outer layer and the inner layer of the shell is 40-50%, and the mass content of the fibers of the middle layer is 60-75%.

Further preferably, the prepreg is a continuous fiber prepreg tape formed by laying and thermal compounding, and the woven textures of the laying layers of two adjacent layers of the continuous fiber prepreg tapes are arranged in a staggered mode, preferably 0 °/90 ° or 0 °/45 °.

Further preferably, the thermoplastic resin includes polyethylene, polypropylene, polycaprolactam, polyhexamethylene adipate, polycarbonate, polyphenylene sulfide, polyether ether ketone, and the like.

Further preferably, the continuous fibers include glass fibers, carbon fibers, basalt fibers, aramid fibers, kevlar fibers, and the like.

Further preferably, the maximum depth of the concave-convex structure of the shell is 50mm-400 mm.

Further preferably, the thickness of the shell is 0.9mm-3 mm.

Compared with the prior art, the utility model has the beneficial effects that:

according to the continuous fiber reinforced thermoplastic battery shell, the shell is of the concave-convex structure with the continuous fiber reinforced thermoplastic three-layer structure, so that the weight of the shell can be reduced, the strength of the shell can be ensured, the weight is light, the shell is anticorrosive and moistureproof, the appearance of the product is smooth, and the cost is relatively low. The continuous fiber support shell structure does not deform in the combustion process, and the adopted halogen-free flame retardant material effectively retards the fire spread, and is safe and reliable.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment or the prior art will be briefly described below.

FIG. 1 is a schematic structural diagram of a continuous fiber reinforced thermoplastic battery case material for a new energy battery pack according to the present invention;

fig. 2 is a schematic structural view of the external appearance of a battery case according to embodiment 1 of the present invention;

fig. 3 is a schematic structural diagram of the appearance of the battery case of embodiment 2 and embodiment 3 of the present invention.

In the figure: 1-outer layer, 2-middle layer, 3-inner layer, 4-mounting edge, 5-mounting hole and 6-concave-convex structure.

Detailed Description

The present invention is further illustrated by the following specific examples, which are, however, not intended to limit the scope of the utility model.

Example 1

A continuous fiber reinforced thermoplastic battery shell for a new energy battery pack is shown in a specific material structure of figure 1, and sequentially comprises an outer layer 1 of a continuous glass fiber halogen-free flame-retardant polypropylene prepreg with 40% of glass fiber content and 0.6mm from top to bottom, wherein the continuous glass fiber halogen-free flame-retardant polypropylene prepreg is obtained by 0 degree/90 degree layering of a 0.3mm continuous glass fiber halogen-free flame-retardant polypropylene prepreg tape; the middle layer 2 is made of 70 percent of continuous fiber reinforced halogen-free flame retardant polypropylene resin prepreg fabric with the glass fiber content of 1.8 mm; the inner layer 3 is a continuous glass fiber halogen-free flame-retardant polypropylene prepreg with the glass fiber content of 50% and the glass fiber content of 0.6mm, and is obtained by 0 degree/90 degree layering of a 0.3mm continuous glass fiber halogen-free flame-retardant polypropylene prepreg tape. And fusing, hot-pressing and compounding the two adjacent layers. The appearance shape of the shell is shown in fig. 2, and comprises a mounting edge 4 positioned on the periphery of the shell body, mounting holes 5 uniformly distributed on the mounting edge 4, and a concave-convex structure 6 forming the shell body; the maximum depth of the shell is 400mm, and the thickness of the shell is 3.0 mm.

Example 2

A continuous fiber reinforced thermoplastic battery shell for a new energy battery pack is shown in a figure 1, and comprises an outer layer 1 of continuous fiber reinforced halogen-free flame retardant nylon PA6 resin prepreg fabric with 40% of glass fiber content and 0.3mm from top to bottom in sequence; the intermediate layer 2 is prepared from a continuous fiber reinforced halogen-free flame-retardant PA6 prepreg with 65% of glass fiber content and 0.3mm, and is obtained by 0 degree/90 degree layering of a 0.15mm continuous glass fiber halogen-free flame-retardant nylon PA6 resin prepreg tape; the inner layer is 40 percent of continuous glass fiber reinforced halogen-free flame retardant nylon PA6 resin pre-impregnated woven cloth with the glass fiber content of 0.3 mm. And fusing, hot-pressing and compounding the two adjacent layers. The appearance shape of the shell is as shown in fig. 3, and comprises a mounting edge 4 positioned on the periphery of the shell body, mounting holes 5 uniformly distributed on the mounting edge 4, and a concave-convex structure 6 forming the shell body; the maximum depth of the shell is 400mm, and the thickness of the shell is 0.9 mm.

Example 3

A continuous fiber reinforced thermoplastic battery shell for a new energy battery pack is shown in a specific material structure of figure 1, and sequentially comprises an outer layer 1 of a continuous carbon fiber halogen-free flame-retardant polypropylene prepreg with 40% of glass fiber content and 0.6mm from top to bottom, wherein the continuous carbon fiber halogen-free flame-retardant polypropylene prepreg is obtained by 0 degree/90 degree layering of a 0.3mm continuous carbon fiber halogen-free flame-retardant polypropylene prepreg tape; the middle layer 2 is made of 70 percent of continuous carbon fiber reinforced halogen-free flame retardant polypropylene resin prepreg fabric with the glass fiber content of 1.8 mm; the inner layer 3 is a continuous carbon fiber halogen-free flame-retardant polypropylene prepreg with the glass fiber content of 50% and the content of 0.6mm, and is obtained by 0 degree/90 degree layering of a 0.3mm continuous glass fiber halogen-free flame-retardant polypropylene prepreg tape. And fusing, hot-pressing and compounding the two adjacent layers. The appearance shape of the shell is as shown in fig. 3, and comprises a mounting edge 4 positioned on the periphery of the shell body, mounting holes 5 uniformly distributed on the mounting edge 4, and a concave-convex structure 6 forming the shell body; the depth of the shell is 200mm, and the thickness of the shell is 2.7 mm.

Example 4

A continuous fiber reinforced thermoplastic battery shell for a new energy battery pack is shown in a specific material structure of figure 1, and sequentially comprises an outer layer 1 of a continuous carbon fiber halogen-free flame-retardant polypropylene prepreg with 40% of glass fiber content and 0.6mm from top to bottom, wherein the continuous carbon fiber halogen-free flame-retardant polypropylene prepreg is obtained by 0 degree/90 degree layering of a 0.3mm continuous carbon fiber halogen-free flame-retardant polypropylene prepreg tape; the middle layer 2 is made of 70 percent of continuous carbon fiber reinforced halogen-free flame retardant polypropylene resin prepreg fabric with the glass fiber content of 0.8 mm; the inner layer 3 is a continuous carbon fiber halogen-free flame-retardant polypropylene prepreg with the glass fiber content of 50% and the content of 0.6mm, and is obtained by 0 degree/45 degree layering of a 0.3mm continuous glass fiber halogen-free flame-retardant polypropylene prepreg tape. And fusing, hot-pressing and compounding the two adjacent layers. The appearance shape of the shell is as shown in fig. 3, and comprises a mounting edge 4 positioned on the periphery of the shell body, mounting holes 5 uniformly distributed on the mounting edge 4, and a concave-convex structure 6 forming the shell body; the depth of the shell is 50mm, and the thickness of the shell is 2.0 mm.

The continuous fiber reinforced thermoplastic battery shell for the new energy battery pack provided by the utility model has the advantages of light weight, corrosion resistance, moisture resistance, smooth product appearance and relatively low cost, and the concave-convex structure can reduce the weight of the shell and ensure the strength of the shell. The continuous fiber support shell structure does not deform in the combustion process, and the halogen-free flame retardant material effectively retards the fire spread. The production process is environment-friendly, the applied materials can be recycled, and the product is environment-friendly.

The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A continuous fiber reinforced thermoplastic battery case, comprising: the mounting edge (4) is positioned on the periphery of the shell body, the mounting holes (5) are uniformly distributed on the mounting edge (4), and the concave-convex structure (6) forms the shell body; the shell at least comprises an outer layer (1), a middle layer (2) and an inner layer (3) from the outer surface to the inner part, and the adjacent two layers are fused and compounded in a hot pressing manner; the outer layer (1), the intermediate layer (2) and the inner layer (3) are of a continuous fiber reinforced thermoplastic resin pre-impregnated woven fabric, a continuous fiber resin reinforced thermoplastic resin mixed woven fabric or a continuous fiber reinforced thermoplastic prepreg melt hot-pressing composite structure.

2. The continuous fiber reinforced thermoplastic battery case of claim 1, wherein the prepreg is a ply-thermal composite continuous fiber prepreg tape, and the weave textures of adjacent two plies of the continuous fiber prepreg tape are staggered.

3. The continuous fiber reinforced thermoplastic battery case of claim 2, wherein the weave grain stagger angle of the continuous fiber prepreg tape lay is 0 °/90 ° or 0 °/45 °.

4. The continuous fiber reinforced thermoplastic battery casing of claim 1, wherein the depth of the concavo-convex structure of the casing is 50mm to 400 mm.

5. The continuous fiber reinforced thermoplastic battery case of claim 1, wherein the case thickness is 0.9mm to 3 mm.