Impact-resistant power battery bottom protective plate

Abstract

The utility model relates to an impact-resistant power battery bottom protective plate which comprises three impact-resistant layers which are parallel to one another, a supporting layer is bonded between every two adjacent impact-resistant layers through hot pressing, and the impact-resistant layers are continuous glass fiber reinforced polypropylene pads and / or continuous PET (Polyethylene Terephthalate) composite long fiber pads. The power battery bottom guard plate has the beneficial effects that the structural design that the three anti-impact layers and the two supporting layers are alternately arranged, hot-pressed and bonded is adopted, when foreign matters impact the power battery bottom guard plate, each anti-impact layer can resist the impact of the foreign matters, and each supporting layer can play a buffering role and reduce the impact force of part of the foreign matters, so that the service life of the power battery bottom guard plate is prolonged. Therefore, the overall impact resistance of the power battery bottom protection plate is improved, and the risk that the power battery bottom protection plate is punctured by foreign matters is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile parts especially relates to a shock-resistant power battery bottom guard plate. BACKGROUND

[0002] The power battery bottom guard plate is installed at the bottom of the electric automobile, and mainly functions to protect the power battery pack from invasion of foreign matters such as stones, water and sand. Therefore, the power battery bottom guard plate needs to have impact resistance and fire resistance. The general scheme of the power battery bottom guard plate at present is a steel plate + fire-resistant coating or a sandwich structure composite plate. Since the existing power battery bottom guard plate has a simple structure, the existing power battery bottom guard plate has poor impact resistance and is easily penetrated by foreign matters. SUMMARY

[0003] The utility model aims at overcoming the above problems existing in the prior art and providing a shock-resistant power battery bottom guard plate.

[0004] To achieve the above technical purposes and effects, the utility model realizes the following technical scheme:

[0005] A shock-resistant power battery bottom guard plate, which comprises three layers of impact-resistant layers parallel to each other, and a support layer is adhered between two adjacent impact-resistant layers by hot pressing, and the impact-resistant layer is a continuous glass fiber reinforced polypropylene pad and / or a continuous PET composite long fiber pad.

[0006] The support layer is at least one of a polypropylene honeycomb plate, a polypropylene round hole plate, an aluminum honeycomb plate, a PET foamed plate, a polyurethane foamed plate and a steel plate.

[0007] The thickness of the impact-resistant layer is 0.3-2 mm.

[0008] The thickness of the support layer is 0.8-8 mm.

[0009] The continuous glass fiber reinforced polypropylene pad comprises a polypropylene pad body and four layers of continuous glass fiber layers, the continuous glass fiber layers are embedded in the polypropylene pad body, and each layer of the glass fiber layer is arranged by a plurality of continuous glass fiber bundles parallel to each other.

[0010] As a preferred mode, the continuous glass fiber bundles in the first layer and the fourth layer of continuous glass fiber layers are arranged in the same direction from top to bottom, the continuous glass fiber bundles in the second layer and the third layer of continuous glass fiber layers are arranged in the same direction from top to bottom, and the continuous glass fiber bundles in the first layer and the second layer of continuous glass fiber layers form an included angle of 45° or 90°.

[0011] As another preferred mode, the continuous glass fiber bundles in the first continuous glass fiber layer and the third continuous glass fiber layer are arranged in the same direction, the continuous glass fiber bundles in the second continuous glass fiber layer and the fourth continuous glass fiber layer are arranged in the same direction, and the continuous glass fiber bundles in the first continuous glass fiber layer and the second continuous glass fiber layer form an included angle of 45° or 90°.

[0012] The continuous PET composite long fiber mat is formed by hot pressing and bonding of continuous PET composite long fibers, the continuous PET composite long fibers are arranged in a wavy line shape or a horizontal and vertical interlaced arrangement, the continuous PET composite long fiber comprises a PET fiber core and a low-melting-point PET skin layer, and the PET fiber core is wrapped in the low-melting-point PET skin layer.

[0013] The beneficial effects of the utility model are: the three layers of impact-resistant layers and the two layers of support layers are arranged and hot-pressed and bonded in the structure design, when foreign matters impact the bottom protection plate of the power battery, each layer of impact-resistant layers can resist the impact of foreign matters, and each layer of support layers can play a buffering role and reduce the impact force of a part of foreign matters, so that the overall impact resistance of the bottom protection plate of the power battery is improved, and the risk of the bottom protection plate of the power battery being penetrated by foreign matters is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] The drawings described herein are used to provide further understanding of the utility model and constitute a part of the application, the schematic embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute undue limitation on the utility model. In the drawings:

[0015] Figure 1 It is the structure schematic view of the bottom protection plate of the power battery in the utility model embodiment one;

[0016] Figure 2 It is the structure schematic view of the bottom protection plate of the power battery in the utility model embodiment two;

[0017] Figure 3 It is the structure schematic view of the bottom protection plate of the power battery in the utility model embodiment three;

[0018] Figure 4 It is the structure schematic view of the bottom protection plate of the power battery in the utility model embodiment four;

[0019] Mark explanation in the drawing: continuous glass fiber reinforced polypropylene mat 1, aluminum honeycomb plate 2, continuous PET composite long fiber mat 3, steel plate 4, polypropylene honeycomb plate 5, PET foaming plate 6, polypropylene round hole plate 7, polyurethane foaming plate 8. DETAILED DESCRIPTION

[0020] The utility model discloses below will refer to the drawing and combine the embodiment, to explain in detail.

[0021] As Figure 1 The embodiment one shown in the figure, a kind of impact-resistant power battery bottom guard plate, power battery bottom guard plate includes three layers of mutually parallel impact-resistant layers, and a layer of support layer is adhered between two adjacent impact-resistant layers by hot pressing, three layers of impact-resistant layers are in turn lower impact-resistant layer, middle impact-resistant layer, upper impact-resistant layer from bottom to top, two layers of support layer are in turn lower support layer, upper support layer from bottom to top.

[0022] Lower impact-resistant layer is continuous glass fiber reinforced polypropylene pad 1, and the thickness of lower impact-resistant layer is 0.3mm;Middle impact-resistant layer is continuous glass fiber reinforced polypropylene pad 1, and the thickness of middle impact-resistant layer is 0.3mm;Upper impact-resistant layer is continuous glass fiber reinforced polypropylene pad 1, and the thickness of upper impact-resistant layer is 0.3mm.

[0023] Lower support layer is aluminum honeycomb board 2, and the thickness of lower support layer is 8mm;Upper support layer is aluminum honeycomb board 2, and the thickness of upper support layer is 8mm.

[0024] Continuous glass fiber reinforced polypropylene pad 1 includes polypropylene pad body and four layers of continuous glass fiber layers, and continuous glass fiber layer is embedded in polypropylene pad body, and each layer of glass fiber layer is arranged by a plurality of mutually parallel continuous glass fiber bundles, and the arrangement direction of continuous glass fiber bundle in first layer continuous glass fiber layer and fourth layer continuous glass fiber layer is same from top to bottom, and the arrangement direction of continuous glass fiber bundle in second layer continuous glass fiber layer and third layer continuous glass fiber layer is same from top to bottom, and the continuous glass fiber bundle between first layer continuous glass fiber layer and second layer continuous glass fiber layer forms 45 ° angle from top to bottom.

[0025] The shape of interlacing is formed by continuous glass fiber bundle in different layers of continuous glass fiber layers, and the characteristics that glass fiber has high temperature resistance (glass fiber melting point 680 DEG C), improve the impact resistance and fire resistance of continuous glass fiber reinforced polypropylene pad.

[0026] As Figure 2 The embodiment two shown in the figure, a kind of impact-resistant power battery bottom guard plate, power battery bottom guard plate includes three layers of mutually parallel impact-resistant layers, and a layer of support layer is adhered between two adjacent impact-resistant layers by hot pressing, three layers of impact-resistant layers are in turn lower impact-resistant layer, middle impact-resistant layer, upper impact-resistant layer from bottom to top, two layers of support layer are in turn lower support layer, upper support layer from bottom to top.

[0027] The lower impact-resistant layer is a continuous PET composite long-fiber mat 3, and the thickness of the lower impact-resistant layer is 2 mm; the middle impact-resistant layer is a continuous PET composite long-fiber mat 3, and the thickness of the middle impact-resistant layer is 2 mm; the upper impact-resistant layer is a continuous PET composite long-fiber mat 3, and the thickness of the upper impact-resistant layer is 2 mm.

[0028] The lower support layer is a steel plate 4, and the thickness of the lower support layer is 0.8 mm; the upper support layer is a steel plate 4, and the thickness of the upper support layer is 0.8 mm.

[0029] The continuous PET composite long-fiber mat 3 is formed by hot pressing and bonding of continuous PET composite long fibers, and the continuous PET composite long fibers are arranged in a wavy line shape or a horizontal and vertical interlaced arrangement. The continuous PET composite long fibers include a PET fiber core and a low-melting-point PET skin layer, and the PET fiber core is wrapped in the low-melting-point PET skin layer. By controlling the forming temperature, the low-melting-point PET skin layer is melted to play a bonding role, while the PET fiber core does not melt to play a reinforcing role, thereby improving the impact resistance and corrosion resistance of the continuous PET composite long-fiber mat 3.

[0030] As shown in Example Three, Figure 3 An impact-resistant power battery bottom guard plate, as shown in Example Three, includes three layers of impact-resistant layers parallel to each other, and a support layer is bonded between any two adjacent impact-resistant layers by hot pressing. The three layers of impact-resistant layers are sequentially arranged from bottom to top as a lower impact-resistant layer, a middle impact-resistant layer, and an upper impact-resistant layer, and the two layers of support layers are sequentially arranged from bottom to top as a lower support layer and an upper support layer.

[0031] The lower impact-resistant layer is a continuous PET composite long-fiber mat 3, and the thickness of the lower impact-resistant layer is 1 mm; the middle impact-resistant layer is a continuous glass fiber reinforced polypropylene mat 1, and the thickness of the middle impact-resistant layer is 0.6 mm; the upper impact-resistant layer is a continuous PET composite long-fiber mat 3, and the thickness of the upper impact-resistant layer is 1 mm.

[0032] The lower support layer is a polypropylene honeycomb plate 5, and the thickness of the lower support layer is 5 mm; the upper support layer is a PET foam plate 6, and the thickness of the upper support layer is 4 mm.

[0033] The continuous glass fiber reinforced polypropylene mat 1 includes a polypropylene mat body and four layers of continuous glass fiber layers, and the continuous glass fiber layers are embedded in the polypropylene mat body. Each layer of glass fiber layer is arranged by a plurality of parallel continuous glass fiber bundles. The arrangement directions of the continuous glass fiber bundles in the first and fourth layers of continuous glass fiber layers are the same from top to bottom. The arrangement directions of the continuous glass fiber bundles in the second and third layers of continuous glass fiber layers are the same from top to bottom. The continuous glass fiber bundles in the first and second layers of continuous glass fiber layers form an included angle of 90° from top to bottom.

[0034] The continuous PET composite long fiber mat 3 is formed by hot pressing and bonding of continuous PET composite long fibers, the continuous PET composite long fibers are arranged in a wavy line shape or a horizontal and vertical interlaced arrangement, and the continuous PET composite long fibers comprise a PET fiber core and a low-melting-point PET skin layer, and the PET fiber core is wrapped in the low-melting-point PET skin layer.

[0035] As shown in the fourth embodiment, Figure 4 The impact-resistant power battery bottom guard plate comprises three layers of impact-resistant layers parallel to each other, and a support layer is bonded between any two adjacent impact-resistant layers by hot pressing, the three layers of impact-resistant layers are a lower impact-resistant layer, a middle impact-resistant layer and an upper impact-resistant layer from bottom to top, and the two support layers are a lower support layer and an upper support layer from bottom to top.

[0036] The lower impact-resistant layer is a continuous glass fiber reinforced polypropylene mat 1, and the thickness of the lower impact-resistant layer is 0.8 mm; the middle impact-resistant layer is a continuous PET composite long fiber mat 2, and the thickness of the middle impact-resistant layer is 1.4 mm; and the upper impact-resistant layer is a continuous glass fiber reinforced polypropylene mat 1, and the thickness of the upper impact-resistant layer is 0.8 mm.

[0037] The lower support layer is a polypropylene round hole plate 7, and the thickness of the lower support layer is 5 mm; and the upper support layer is a polyurethane foam plate 8, and the thickness of the upper support layer is 4 mm.

[0038] The continuous glass fiber reinforced polypropylene mat comprises a polypropylene mat body and four layers of continuous glass fiber layers, the continuous glass fiber layers are embedded in the polypropylene mat body, each layer of glass fiber layer is arranged by a plurality of parallel continuous glass fiber bundles, the arrangement directions of the continuous glass fiber bundles in the first and third layers of continuous glass fiber layers counted from top to bottom are the same, the arrangement directions of the continuous glass fiber bundles in the second and fourth layers of continuous glass fiber layers counted from top to bottom are the same, and a 45° included angle is formed between the continuous glass fiber bundles in the first and second layers of continuous glass fiber layers counted from top to bottom.

[0039] The continuous PET composite long fiber mat is formed by hot pressing and bonding of continuous PET composite long fibers, the continuous PET composite long fibers are arranged in a wavy line shape or a horizontal and vertical interlaced arrangement, and the continuous PET composite long fibers comprise a PET fiber core and a low-melting-point PET skin layer, and the PET fiber core is wrapped in the low-melting-point PET skin layer.

[0040] In addition to the three arrangement modes of the continuous glass fiber bundles in the glass fiber layers in Embodiment One, Embodiment Three and Embodiment Four, the continuous glass fiber bundles in the first layer and the third layer counted from top to bottom can be arranged in the same direction, the continuous glass fiber bundles in the second layer and the fourth layer counted from top to bottom can be arranged in the same direction, and the continuous glass fiber bundles in the first layer and the second layer counted from top to bottom can form an included angle of 90°.

[0041] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application.

Claims

1. An impact-resistant power cell kick panel, characterized by: The power battery bottom protection plate comprises three layers of impact-resistant layers parallel to each other, and a support layer is bonded between two adjacent impact-resistant layers by hot pressing, the impact-resistant layer is a continuous glass fiber reinforced polypropylene pad and / or a continuous PET composite long fiber pad.

2. The power battery bottom protection plate according to claim 1, characterized in that: The support layer is at least one of a polypropylene honeycomb plate, a polypropylene round hole plate, an aluminum honeycomb plate, a PET foamed plate, a polyurethane foamed plate, and a steel plate.

3. The power battery bottom guard plate according to claim 1, characterized in that: The thickness of the impact-resistant layer is 0.3mm-2mm.

4. The power battery underguard according to claim 1, characterized in that: The thickness of the support layer is 0.8mm-8mm.

5. The power battery underguard according to claim 1, characterized in that: The continuous glass fiber reinforced polypropylene pad comprises a polypropylene pad body and four layers of continuous glass fiber layers embedded in the polypropylene pad body, and each layer of the glass fiber layer is arranged by a plurality of continuous glass fiber bundles parallel to each other.

6. The power battery bottom guard plate according to claim 5, characterized in that: The arrangement direction of the continuous glass fiber bundles in the first layer and the fourth layer from top to bottom is the same, the arrangement direction of the continuous glass fiber bundles in the second layer and the third layer from top to bottom is the same, and the continuous glass fiber bundles in the first layer and the second layer from top to bottom form an included angle of 45° or 90°.

7. The power battery bottom guard plate according to claim 5, characterized in that: The arrangement direction of the continuous glass fiber bundles in the first layer and the third layer from top to bottom is the same, the arrangement direction of the continuous glass fiber bundles in the second layer and the fourth layer from top to bottom is the same, and the continuous glass fiber bundles in the first layer and the second layer from top to bottom form an included angle of 45° or 90°.

8. The power battery underguard according to claim 1, characterized in that: The continuous PET composite long fiber pad is hot-pressed and bonded by continuous PET composite long fibers, the continuous PET composite long fibers are arranged in a wavy line shape or a horizontal and vertical interlaced arrangement, the continuous PET composite long fibers comprise a PET fiber core and a low-melting-point PET skin layer, and the PET fiber core is wrapped in the low-melting-point PET skin layer.

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