Novel multi-layer light-weight high-impact strength power battery bottom guard plate

Abstract

The utility model relates to a novel multilayer lightweight high impact strength power battery bottom guard plate, including one energy absorption core material layer, one reinforcing metal layer, three layers of continuous glass fiber reinforced layers are arranged from below to above in proper order, the energy absorption core material layer is bonded with thermosetting resin between two continuous glass fiber reinforced layers of middle part and top, the reinforcing metal layer is bonded with thermosetting resin between two continuous glass fiber reinforced layers of middle part and bottom. Advantageous effect is: utilize continuous glass fiber reinforced layer and reinforcing metal layer cooperation to improve the resistance sharp object puncture ability of power battery bottom guard plate, adopt thermosetting resin thermosetting forming to bond continuous glass fiber reinforced layer with energy absorption core material layer, reinforcing metal layer, avoid the deformation, delamination of high temperature environment.

Description

Technical Field

[0001] This utility model relates to the field of power battery casing technology, and in particular to a novel multi-layer lightweight high-impact strength power battery bottom protection plate. Background Technology

[0002] With the increasing safety requirements for power batteries, new requirements are being placed on the impact resistance of the bottom protection plate. The traditional solution is to increase the weight on the original basis to improve the impact resistance, but the effect is minimal and it increases the weight of the battery pack, reducing the driving range of electric vehicles.

[0003] To improve the impact energy of power batteries and reduce the weight of battery packs, various composite bottom protection plates have been proposed in the market, such as sandwich honeycomb plates (PP-GF unidirectional strip + PP honeycomb core + PP-GF unidirectional strip) and sandwich steel protection plates (PP-GF unidirectional strip + PP honeycomb core + PP-GF unidirectional strip). However, when subjected to sharp local impacts, the top and bottom panels are still prone to being punctured or dented at the impact point; the high temperatures generated by the battery pack during operation also cause the composite bottom protection plates to easily deform and delaminate. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned problems in the existing technology and provide a new type of multi-layer lightweight high-impact strength power battery bottom protection plate.

[0005] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution:

[0006] A novel multi-layer lightweight high-impact strength power battery bottom protection plate includes an energy-absorbing core material layer, a reinforcing metal layer, and three continuous glass fiber reinforcement layers arranged sequentially from bottom to top. The energy-absorbing core material layer is bonded to the two continuous glass fiber reinforcement layers located in the middle and top with thermosetting resin, and the reinforcing metal layer is bonded to the two continuous glass fiber reinforcement layers located in the middle and bottom with thermosetting resin.

[0007] The energy-absorbing core material layer is one of the following: polypropylene foam board, polyethylene terephthalate foam board, nylon foam board, polyurethane foam board, microporous foamed polypropylene board, balsa wood board, polypropylene honeycomb core board, aluminum honeycomb core board, stainless steel honeycomb core board, and carbon fiber honeycomb core board.

[0008] The thickness of the energy-absorbing core material layer is 2mm to 10mm.

[0009] The reinforcing metal layer is a steel plate with a thickness of 0.5 mm to 3.0 mm.

[0010] The reinforcing metal layer is an aluminum alloy plate with a thickness of 1.0 mm to 3.0 mm.

[0011] The continuous fiberglass reinforcement layer includes at least one layer of stitch-woven felt.

[0012] The continuous fiberglass reinforcement layer includes at least one layer of stitch-woven felt and at least one layer of chopped strand mat.

[0013] The thickness of the continuous glass fiber reinforcement layer is 0.2 mm to 1.0 mm, and the areal density of the continuous glass fiber reinforcement layer is 400 g / m² to 800 g / m².

[0014] The thermosetting resin is either epoxy resin or thermosetting polyurethane.

[0015] The thickness of the bottom protective plate of the power battery is 5mm to 15mm.

[0016] The beneficial effects of this utility model are: by using a continuous glass fiber reinforced layer and a reinforced metal layer together, the bottom protection plate of the power battery can be improved to resist the puncture of sharp objects. The continuous glass fiber reinforced layer is bonded to the energy-absorbing core material layer and the reinforced metal layer by thermosetting resin, so as to avoid deformation and delamination in high-temperature environments. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of the bottom guard plate of the power battery in Embodiment 1 of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the bottom protective plate of the power battery in Embodiment 2 of this utility model;

[0020] The labels in the diagram are as follows: Power battery bottom protection plate 100, energy-absorbing core material layer 1, reinforced metal layer 2, continuous glass fiber reinforced layer 3, stitch-woven felt 31, and chopped strand mat 32. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] A novel multi-layered lightweight, high-impact-strength power battery bottom protector includes an energy-absorbing core material layer, a reinforcing metal layer, and three continuous glass fiber reinforcement layers arranged sequentially from bottom to top. The energy-absorbing core material layer is bonded to the two continuous glass fiber reinforcement layers located in the middle and top sections with thermosetting resin, and the reinforcing metal layer is bonded to the two continuous glass fiber reinforcement layers located in the middle and bottom sections with thermosetting resin. The thickness of the power battery bottom protector is 5mm to 15mm.

[0023] The continuous glass fiber reinforcement layer and the reinforced metal layer are combined to improve the resistance of the bottom protection plate of the power battery to puncture by sharp objects. The continuous glass fiber reinforcement layer is bonded to the energy-absorbing core material layer and the reinforced metal layer by thermosetting resin to avoid deformation and delamination in high-temperature environments.

[0024] The energy-absorbing core material layer is one of the following: polypropylene foam board, polyethylene terephthalate foam board, nylon foam board, polyurethane foam board, microporous foamed polypropylene board, balsa wood board, polypropylene honeycomb core board, aluminum honeycomb core board, stainless steel honeycomb core board, and carbon fiber honeycomb core board. The thickness of the energy-absorbing core material layer is 2mm to 10mm.

[0025] The reinforcing metal layer is made of steel plate or aluminum alloy plate. The steel plate is galvanized steel plate or high-tensile steel, and the thickness of the steel plate is 0.5mm to 3.0mm; the aluminum alloy plate is made of 3-series aluminum, 5-series aluminum or 6-series aluminum, and the thickness of the aluminum alloy plate is 1.0mm to 3.0mm.

[0026] The continuous fiberglass reinforcement layer includes at least one layer of stitch-woven mat. Alternatively, the continuous fiberglass reinforcement layer includes at least one layer of stitch-woven mat 31 and at least one layer of chopped strand mat 32.

[0027] The thickness of the continuous glass fiber reinforcement layer is 0.2mm to 1.0mm, and the areal density of the continuous glass fiber reinforcement layer is 400g / m² to 800g / m².

[0028] After thermosetting resin is thermoset, a continuous glass fiber reinforcement layer is embedded in the thermosetting resin, and the thickness of the continuous glass fiber reinforcement layer bonded to the thermosetting resin is 0.5 to 3.0 mm.

[0029] The thermosetting resin is epoxy resin or thermosetting polyurethane.

[0030] like Figure 1 The first embodiment shown describes a novel multi-layer lightweight high-impact strength power battery bottom protection plate 100, which includes an energy-absorbing core material layer 1, a reinforcing metal layer 2, and three continuous glass fiber reinforcing layers 3 arranged sequentially from bottom to top. The energy-absorbing core material layer 1 is bonded with thermosetting resin between the two continuous glass fiber reinforcing layers 3 located in the middle and top, and the reinforcing metal layer 2 is bonded with thermosetting resin between the two continuous glass fiber reinforcing layers 3 located in the middle and bottom.

[0031] The energy-absorbing core material layer 1 is a polypropylene honeycomb core panel with a thickness of 8mm; the reinforcing metal layer 2 is an aluminum alloy plate with a thickness of 3.0mm; the continuous glass fiber reinforcement layer 3 consists of three overlapping stitch-woven mats with a thickness of 0.4mm and an areal density of 500g / m²; the thermosetting resin is epoxy resin; and the power battery bottom protection plate 100 has a thickness of 13.1mm.

[0032] like Figure 2 The second embodiment shown describes a novel multi-layer lightweight high-impact strength power battery bottom protection plate 100, which includes an energy-absorbing core material layer 1, a reinforcing metal layer 2, and three continuous glass fiber reinforcing layers 3 arranged sequentially from bottom to top. The energy-absorbing core material layer 1 is bonded with thermosetting resin between the two continuous glass fiber reinforcing layers 3 located in the middle and top, and the reinforcing metal layer 2 is bonded with thermosetting resin between the two continuous glass fiber reinforcing layers 3 located in the middle and bottom.

[0033] The energy-absorbing core material layer 1 is a carbon fiber honeycomb core panel with a thickness of 6mm; the reinforcing metal layer 2 is a steel plate with a thickness of 1.0mm; the continuous glass fiber reinforcing layer 3 includes two layers of stitch-woven felt 31 and one layer of chopped strand mat 32; the thickness of the continuous glass fiber reinforcing layer 3 is 0.6mm, and the areal density of the continuous glass fiber reinforcing layer 3 is 650g / m²; the thermosetting resin is thermosetting polyurethane; and the thickness of the power battery bottom protection plate 100 is 9.7mm.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A novel multi-layer lightweight high-impact strength power battery bottom protection plate, characterized in that: It includes an energy-absorbing core material layer, a reinforcing metal layer, and three continuous glass fiber reinforcement layers arranged from bottom to top. The energy-absorbing core material layer is bonded with thermosetting resin between the two continuous glass fiber reinforcement layers located in the middle and at the top, and the reinforcing metal layer is bonded with thermosetting resin between the two continuous glass fiber reinforcement layers located in the middle and at the bottom.

2. The power battery bottom protection plate according to claim 1, characterized in that: The energy-absorbing core material layer is one of the following: polypropylene foam board, polyethylene terephthalate foam board, nylon foam board, polyurethane foam board, microporous foamed polypropylene board, balsa wood board, polypropylene honeycomb core board, aluminum honeycomb core board, stainless steel honeycomb core board, and carbon fiber honeycomb core board.

3. The power battery bottom protection plate according to claim 1, characterized in that: The thickness of the energy-absorbing core material layer is 2mm to 10mm.

4. The power battery bottom protection plate according to claim 1, characterized in that: The reinforcing metal layer is a steel plate with a thickness of 0.5 mm to 3.0 mm.

5. The power battery bottom protection plate according to claim 1, characterized in that: The reinforcing metal layer is an aluminum alloy plate with a thickness of 1.0 mm to 3.0 mm.

6. The power battery bottom protection plate according to claim 1, characterized in that: The continuous fiberglass reinforced layer comprises at least one layer of stitch-woven felt.

7. The power battery bottom protection plate according to claim 6, characterized in that: The continuous fiberglass reinforced layer comprises at least one stitch-woven mat and at least one chopped strand mat.

8. The power battery bottom protection plate according to claim 1, characterized in that: The thickness of the continuous glass fiber reinforcement layer is 0.2 mm to 1.0 mm, and the areal density of the continuous glass fiber reinforcement layer is 400 g / m² to 800 g / m².

9. The power battery bottom protection plate according to claim 1, characterized in that: The thermosetting resin is epoxy resin or thermosetting polyurethane.

10. The power battery bottom protection plate according to claim 1, characterized in that: The thickness of the bottom protection plate of the power battery is 5mm to 15mm.

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