Buffer plate used for being connected with battery bottom protective plate and battery pack

Abstract

The utility model relates to the technical field of new energy automobile accessories, in particular to a buffer plate used for being connected with a battery bottom protective plate and a battery pack, and the buffer plate comprises a foaming material layer and protective layers respectively connected to the upper surface and the lower surface of the foaming material layer, the protective layer comprises a plurality of continuous fiber reinforced resin composite material layers, and the projections of the fiber length directions of every two adjacent continuous fiber reinforced resin composite material layers on the horizontal plane form an included angle. Due to the fact that the projections of the length directions of the fibers of every two adjacent continuous fiber reinforced resin composite material layers on the horizontal plane form the included angle, the fibers in the continuous fiber reinforced resin composite material layers form a multi-angle crossed compact structure. When the buffer plate is subjected to external impact, energy can be absorbed through shearing force and layering between layers, damage and collapse are avoided, and the bottom protection plate and the tray can be effectively protected. The battery pack comprises the buffer plate, so that the battery pack has relatively good impact resistance and waterproof performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy automobile accessory technical field more specifically, relate to a kind of buffer plate for being connected with battery bottom guard plate and battery pack. BACKGROUND

[0002] With the rapid development of new energy automobile market, the safety performance of new energy electric vehicle has become the focus of consumers. The bottom guard plate of new energy electric vehicle is a protective structure installed at the bottom of the electric vehicle. The bottom guard plate is connected with the tray and is mainly used for protecting the battery pack, motor and other key components from impact and damage from external objects. As an important part of new energy electric vehicle, the safety of the bottom guard plate is directly related to the overall performance of the vehicle and the safety of passengers.

[0003] The common bottom guard plate material on the market is mainly metal material, but the metal material will produce a large deformation after impact, which will cause a large damage to the tray and the battery cell. Therefore, a buffer plate made of foaming material is usually added between the bottom guard plate and the tray to improve the impact resistance of the bottom guard plate and reduce the damage to the internal structure caused by deformation. However, the single foaming material structure has insufficient strength, and when a hard object breaks and produces a large deformation, the buffer plate made of single foaming material is prone to collapse and failure damage, and cannot achieve good buffering effect. SUMMARY

[0004] The utility model discloses a buffer plate for being connected with battery bottom guard plate to overcome the insufficient strength of the buffer plate for being connected with the bottom guard plate of automobile in the prior art, and can effectively protect the bottom guard plate and the tray.

[0005] Another object of the utility model is to provide a battery pack.

[0006] To solve the above technical problems, the utility model adopts the technical scheme of a buffer plate for being connected with battery bottom guard plate, which comprises a foaming material layer and a protective layer connected to the upper surface and the lower surface of the foaming material layer, respectively. The protective layer comprises multiple layers of continuous fiber reinforced resin composite material layers, and the projections of the fiber length directions of the two adjacent continuous fiber reinforced resin composite material layers on the horizontal plane have an included angle.

[0007] The utility model discloses a technical scheme, be provided with the protective layer on the upper surface and the lower surface of foamed material layer, and the protective layer includes the continuous fiber reinforced resin composite material layer of multilayer, and the continuous fiber reinforced resin composite material layer plays the role of reinforcing structural strength to foamed material layer, improves the waterproof performance of the buffer board simultaneously, can effectively protect the battery pack. Since the projection of the fiber length direction of the continuous fiber reinforced resin composite material layer of adjacent two layers on the horizontal plane has the included angle, makes the fiber in each continuous fiber reinforced resin composite material layer form the compact structure of multi-angle intersection. When the buffer board is impacted by the outside, can absorb the energy through the shearing force and delamination between layers, avoids the damage collapse, can effectively protect the bottom guard plate and tray.

[0008] Further, the protective layer includes an even number of the continuous fiber reinforced resin composite material layers, each of the continuous fiber reinforced resin composite material layers is symmetrically arranged along a middle plane of the protective layer; or the protective layer includes an odd number of the continuous fiber reinforced resin composite material layers, each of the continuous fiber reinforced resin composite material layers is symmetrically arranged along the continuous fiber reinforced resin composite material layer located in the middle.

[0009] In the scheme, the impact resistance of the buffer board is further improved through the symmetrically arranged continuous fiber reinforced resin composite material layers.

[0010] Further, the included angle ranges from 20° to 90°.

[0011] In the above scheme, the projection of the fiber length direction of the continuous fiber reinforced resin composite material layer of adjacent two layers on the horizontal plane has an included angle preferably ranging from 20° to 90°, and has good impact resistance.

[0012] Further, the side edges of the foamed material layer and the protective layer are further connected with edge sealing plates, and the edge sealing plates include continuous fiber reinforced resin composite material layers.

[0013] In the above scheme, the foamed material layer is fully wrapped and protected by the edge sealing plates and the protective layer, and the waterproof performance and impact resistance of the buffer board are improved.

[0014] Further, a glue layer is connected between the foamed material layer and the protective layer.

[0015] In the above scheme, the foamed material layer and the protective layer are connected through the glue layer, preventing the protective layer from falling off.

[0016] Further, the thickness of the foamed material layer is 2.0mm-10.0mm, and the thickness of the protective layer is 0.15mm-0.60mm.

[0017] Further, the continuous fiber of the continuous fiber reinforced resin composite layer is at least one of glass fiber, carbon fiber and aramid fiber; the resin of the continuous fiber reinforced resin composite layer is at least one of polyethylene, polypropylene, polyamide, acrylonitrile-butadiene-styrene resin, polyvinyl chloride, polystyrene, polyethylene terephthalate and polycarbonate; and the foaming material of the foaming material layer is at least one of PP, PET, PE, EVA, PVC and rubber.

[0018] Further, the foaming material layer and the protective layer are connected by hot melting.

[0019] In the above scheme, the connection strength between the foaming material layer and the protective layer can be improved by hot melting.

[0020] Further, the side edges of the foaming material layer and the protective layer are connected by hot melting.

[0021] In the above scheme, the connection strength between the foaming material layer and the protective layer can be improved by hot melting.

[0022] Further, the side edges of the foaming material layer and the protective layer are connected by hot melting.

[0023] In the above scheme, since the side edge of the foaming material layer and the protective layer is provided with a glue injection groove, the glue can be coated on the surface of the foaming material layer and the protective layer during connection, and the glue injection groove is filled with glue, and then the foaming material layer and the protective layer are connected, and the foaming material layer and the protective layer are gently extruded to make the glue in the glue injection groove seep into the gap, so as to avoid connection failure due to insufficient glue coating.

[0024] Further, the upper and lower ends of the foaming material layer and the protective layer are provided with positioning convex parts extending horizontally towards the protective layer, and the side edges of the protective layer are provided with positioning concave parts corresponding to the positions of the positioning convex parts, and the positioning convex parts and the positioning concave parts are matched and connected.

[0025] In the above scheme, since the two ends of the foaming material layer and the protective layer are provided with positioning convex parts, and the corresponding side edges of the protective layer are provided with positioning concave parts, the foaming material layer and the protective layer are quickly positioned by matching and connecting the positioning convex parts and the positioning concave parts, so as to facilitate connection, and at the same time, the vertical direction is limited.

[0026] Further, the positioning convex part has a horizontal positioning surface, the horizontal positioning surface is provided with a first clamping part, the positioning concave part is provided with a second clamping part corresponding to the position of the first clamping part, and the first clamping part and the second clamping part are clamped in the vertical direction.

[0027] In the above scheme, the first clamping part and the second clamping part are clamped in the vertical direction, and since the first clamping part is arranged on the horizontal positioning surface, the edge band can be positioned in the horizontal direction, so that the edge band can be quickly positioned and clamped on the side edges of the foamed material layer and the protective layer for connection.

[0028] Further, the first clamping part is a clamping strip, and the second clamping part is a clamping groove.

[0029] In the above scheme, the clamping strip and the clamping groove are clamped, and the longer size of the edge of the buffer plate can be clamped, so that the edge band can be accurately positioned and attached to the side edges of the foamed material layer and the protective layer for connection.

[0030] The utility model also provides a battery pack adopts the buffer plate for battery bottom guard board connection of any one of above. Buffer plate connects between battery bottom guard board and tray, can improve the anti -impact and waterproof performance of battery pack.

[0031] Compared with the prior art, the utility model has the advantages of:

[0032] 1. The buffer plate for connecting with the battery bottom guard plate has a protective layer arranged on the upper surface and the lower surface of the foamed material layer, the protective layer comprises a plurality of continuous fiber reinforced resin composite material layers, the continuous fiber reinforced resin composite material layers enhance the structural strength of the foamed material layer, improve the waterproof performance of the buffer plate, and effectively protect the battery pack.

[0033] 2. The buffer plate for connecting with the battery bottom guard plate has a plurality of continuous fiber reinforced resin composite material layers, the projection of the fiber length direction of the adjacent two layers of continuous fiber reinforced resin composite material layers on the horizontal plane has an included angle, so that the fibers in each continuous fiber reinforced resin composite material layer form a dense structure with multiple angles. When the buffer plate is subjected to external impact, the shear force and delamination between the layers can absorb energy, avoid damage and collapse, and effectively protect the bottom guard plate and the tray.

[0034] 3. The buffer plate for connecting with the battery bottom guard plate has a plurality of continuous fiber reinforced resin composite material layers arranged symmetrically, which further improves the impact resistance of the buffer plate.

[0035] 4. The battery pack has the above-mentioned buffer plate connected between the battery bottom guard plate and the tray, which improves the impact resistance and waterproof performance of the battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is the sectional view of the buffer plate for connecting with the battery bottom guard plate of the utility model;

[0037] Figure 2 is a structural schematic view of the continuous fiber reinforced resin composite material layer;

[0038] Figure 3 is an exploded view of the protective layer;

[0039] Figure 4 is an enlarged view of B of Figure 1

[0040] In the drawings: 1, foam material layer; 2, protective layer; 21, continuous fiber reinforced resin composite material layer; 22, positioning recess; 23, second clamping part; 3, adhesive layer; 4, edge sealing plate; 41, glue injection groove; 42, positioning protrusion; 43, first clamping part. DETAILED DESCRIPTION

[0041] The drawings are only used for illustrative description, and should not be understood as limiting the patent; in order to better illustrate the embodiment, some components in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The positional relationship described in the drawings is only used for illustrative description, and should not be understood as limiting the patent.

[0042] The same or similar reference numerals in the drawings of the embodiments of the utility model correspond to the same or similar components; in the description of the utility model, it is understood that if the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "long" and "short" is based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, therefore the terms describing the positional relationship in the drawings are only used for illustrative description, and should not be understood as limiting the patent, and for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0043] The technical scheme of the utility model will be further specifically described below in combination with the drawings:

[0044] With reference to Figure 1 The embodiment discloses a buffer plate for being connected with a battery bottom guard plate, which comprises a foam material layer 1 and a protective layer 2 connected to the upper surface and the lower surface of the foam material layer 1 respectively, and the protective layer 2 comprises a continuous fiber reinforced resin composite material layer 21.

[0045] ​The continuous fiber reinforced resin composite layer 21 is obtained by laying continuous fibers in a resin in a certain direction and cooling, and its preparation method is in the prior art. The continuous fibers are at least one of glass fibers, carbon fibers and aramid fibers, preferably glass fibers, and the content is 55% to 75%. The resin is at least one of polyethylene, polypropylene, polyamide, acrylonitrile Butadiene Styrene resin, polyvinyl chloride, polystyrene, polyethylene terephthalate and polycarbonate. Preferably, the resin is selected from copolymerized polypropylene resin, which has high impact resistance. The melt index of the copolymerized polypropylene resin is 40-80 g / 10 min at 190°C and 2.16 kg, which can improve the wettability of the resin and the fiber and improve the load transfer capacity of the buffer plate.

[0046] The base resin of the foamed material layer 1 is at least one of PP, PET, PE, EVA, PVC and rubber, which is physically foamed or cross-linked foamed to produce a large number of fine bubbles in the plastic and rubber, increase the volume and reduce the density, and its preparation method is in the prior art. According to the actual demand, the density of the foamed material layer 1 is 100±30 kg / m3, the thickness is 2.0-10.0 mm, the Rockwell hardness is 80±20, and the compressive strength is 0.1-4.0 MPa.

[0047] Reference Figure 2 And Figure 3 The protective layer 2 includes a plurality of continuous fiber reinforced resin composite layers 21, and the projections of the fiber length directions of the adjacent two continuous fiber reinforced resin composite layers 21 on the horizontal plane have an included angle. The number of continuous fiber reinforced resin composite layers 21 can be three, four, five or six, or more layers according to the thickness of the product.

[0048] Because the projections of the fiber length directions of the adjacent two continuous fiber reinforced resin composite layers 21 on the horizontal plane have an included angle, the fibers in each continuous fiber reinforced resin composite layer 21 form a dense structure with multiple angles. When the buffer plate is impacted by external impact, the energy can be absorbed by the shear force and delamination between the layers, avoiding damage and collapse, which can effectively protect the bottom protective plate and the tray.

[0049] As shown in Figure 2 And Figure 3 The fiber direction in a single continuous fiber reinforced resin composite layer 21 is consistent.

[0050] Further reference Figure 3, the exploded view of the split layers of the protective layer 2 is shown. In an optional solution, the protective layer 2 can be divided into six layers of continuous fiber reinforced resin composite material 21, which are divided into two groups by the A-A section in the middle of the figure, and the two groups are symmetrically arranged along the A-A section, and each group includes three layers of continuous fiber reinforced resin composite material 21. In other solutions, the protective layer 2 can also include other numbers of continuous fiber reinforced resin composite material layers 21 connected in sequence, such as three, four, or five layers, etc. Preferably, when the number of layers is even, each continuous fiber reinforced resin composite material layer 21 can be symmetrically arranged along the middle surface of the protective layer. When the number of layers is odd, each continuous fiber reinforced resin composite material layer 21 can be symmetrically arranged along the continuous fiber reinforced resin composite material layer 21 in the middle.

[0051] For adjacent continuous fiber reinforced resin composite material layers 21 in the same group, the fiber directions are cross-arranged, and the projection in the horizontal plane has an included angle, which is preferably in the range of 20° to 90°, to have better impact resistance.

[0052] For example, in this solution, as shown in Figure 3 , the included angle of the fiber directions of adjacent continuous fiber reinforced resin composite material layers 21 is 90°. In other solutions, the included angle can be selected to be 20°, 60°, or other angles within the preferred range.

[0053] Optionally, the foamed material layer 1 and the protective layer 2 are connected by hot melting. Hot melting is an existing connection processing technology. By heating the connecting surface of the protective layer 2 and the foamed material layer 1 to a molten state, and then contacting and cooling to shape. Since the protective layer 2 and the foamed material layer 1 both contain resin materials, the combination is good, and the hot melting connection method can effectively connect and fix, thereby improving the connection strength. In other solutions, the foamed material layer 1 and the protective layer 2 can also be connected by an intermediate connecting layer.

[0054] In this solution, the side edges of the foamed material layer 1 and the protective layer 2 are also connected with the edge sealing plate 4. The edge sealing plate 4 is used for edge sealing treatment, so that the edge sealing plate 4 and the protective layer 2 can fully wrap and protect the foamed material layer 1, and improve the waterproof performance of the buffer plate. The battery bottom protection plate is mainly used to protect the battery pack, motor and other key components from impact and damage from external objects. By connecting the bottom protection plate and the tray with the buffer plate of the present embodiment, the battery pack can not only improve the impact resistance and deformation resistance of the battery pack, but also improve the waterproof performance of the bottom of the battery pack, thereby improving the safety of the battery pack. Therefore, the waterproof performance and impact resistance of the buffer plate play an important role in the safety of the battery pack.

[0055] Preferably, the edge plate 4 is the same as the laminated structure of the protective layer 2. The edge plate 4 and the protective layer 2 are both laminated structures of continuous fiber reinforced resin composite material layer 21, which can improve the overall impact resistance.

[0056] Optionally, the edge plate 4 is connected with the side edges of the foamed material layer 1 and the protective layer 2 by hot melt connection. The hot melt connection method is the same as the prior art. By hot melt connection of the edge plate 4, effective connection and fixation can be achieved, thereby improving the overall connection strength. In other schemes, adhesive connection can also be used.

[0057] Referring to Figure 1 and Figure 4 , the foamed material layer 1 and the protective layer 2 are connected by an adhesive layer 3. The adhesive layer 3 can be a PP adhesive film, which is used to connect the foamed material layer 1 and the protective layer 2. At the same time, since the adhesive layer can be made of the same base resin material as the foamed material layer 1 and the protective layer 2, the combination is good, the connection is stable, and the protective layer 2 can be prevented from falling off. In the case of hot melt connection of the foamed material layer 1 and the protective layer 2, the PP adhesive film can further improve the tightness and stability of the connection.

[0058] Referring to Figure 1 and Figure 4 , the edge plate 4 is connected with the foamed material layer 1 and the protective layer 2 by adhesive connection, and the side of the edge plate 4 facing the foamed material layer 1 and the protective layer 2 is provided with a glue injection groove 41. Specifically, the glue injection groove 41 can be a plurality of groove bodies distributed on one side of the edge plate 4, which are uniformly distributed on the surface of the edge plate 4 for accommodating liquid adhesive.

[0059] In this scheme, since the glue injection groove 41 is provided on one side of the edge plate 4, the adhesive can be coated on the surface of the edge plate 4 during connection and filled in the glue injection groove 41, and then the edge plate 4 is connected to the side edges of the foamed material layer 1 and the protective layer 2. Gently squeeze the edge plate 4 so that the adhesive in the glue injection groove 41 seeps out into the gap, avoiding connection failure due to insufficient adhesive coating.

[0060] Referring to Figure 4 , the upper and lower ends of the edge plate 4 are provided with positioning protrusions 42 extending horizontally towards the protective layer 2, and the side edges of the protective layer 2 are provided with positioning recesses 22 corresponding to the positions of the positioning protrusions 42, and the positioning protrusions 42 are matched and connected with the positioning recesses 22. The positioning protrusions can extend in a generally rectangular shape, and the positioning recesses 22 are also rectangular grooves for convenient positioning connection.

[0061] In this scheme, since the two ends of the edge plate 4 are provided with the positioning protrusions 42, and the corresponding side edges of the protective layer 2 are provided with the positioning recesses 22, the edge plate 4 can be quickly positioned by matching and connecting the positioning protrusions 42 and the positioning recesses 22, so as to facilitate connection, and at the same time, the vertical direction is limited.

[0062] Reference Figure 4 The positioning convex portion 42 has a horizontal positioning surface, and the horizontal positioning surface is provided with a first clamping portion 43. The positioning concave portion 22 is provided with a second clamping portion 23 corresponding to the position of the first clamping portion 43. The first clamping portion 43 and the second clamping portion 23 are clamped in the vertical direction.

[0063] In the scheme, the first clamping portion 43 and the second clamping portion 23 are clamped in the vertical direction. Since the first clamping portion 43 is arranged on the horizontal positioning surface, the edge band 4 can be limited in the horizontal direction, so that the edge band 4 can be quickly positioned and clamped on the side edge of the foam material layer 1 and the protective layer 2 for connection.

[0064] Optionally, the first clamping portion 43 is a clamping strip, and the second clamping portion 23 is a clamping groove. By clamping the clamping strip and the clamping groove, the clamping strip and the clamping groove can be clamped in the vertical direction along the edge of the buffer plate, so that the edge band 4 can be accurately positioned and clamped on the side edge of the foam material layer 1 and the protective layer 2 for connection. In other schemes, the first clamping portion 43 can also be a plurality of clamping protrusions matched and clamped in the clamping groove.

[0065] The scheme also discloses a battery pack adopting the above-mentioned buffer plate for connecting the bottom protective plate of the battery, wherein the buffer plate is connected between the bottom protective plate and the bottom tray of the battery, so that the battery pack can resist impact and deformation, and the waterproof capacity of the bottom of the battery pack can be improved, thereby improving the safety of the battery pack during use.

[0066] The following is further illustrated by specific examples and comparative examples:

[0067] Example 1

[0068] The single-layer continuous fiber reinforced resin composite layer has a thickness of 0.15 mm, and the content of glass fiber is 70%; the protective layer is composed of four layers of continuous fiber reinforced resin composite layers, the fiber included angle between adjacent two layers of continuous fiber reinforced resin composite layers 21 is 90°, and a 0° / 90° layer design is adopted, and the thickness of the protective layer is 0.60 mm; the foam plate is made of PP material, the density is 100 kg / m3, and the thickness is 3.5 mm; the edge band has the same structure as the protective layer; and the overall thickness is 4.7 mm.

[0069] Example 2

[0070] The difference between the embodiment and example 1 is that the protective layer is composed of two layers of continuous fiber reinforced resin composite layers, and the overall thickness is 4.1 mm.

[0071] Example 3

[0072] The difference between this embodiment and embodiment 1 is that the fiber angle between the two adjacent continuous fiber reinforced resin composite layers 21 is 45°.

[0073] Example 4

[0074] The difference between this embodiment and embodiment 1 is that the fiber angle between the two adjacent continuous fiber reinforced resin composite layers 21 is 20°.

[0075] Comparative Example 1

[0076] The difference between this comparative example and embodiment 1 is that the fiber angle between the two adjacent continuous fiber reinforced resin composite layers 21 is 0°, i.e. the fiber directions are arranged in parallel.

[0077] Comparative Example 2

[0078] The difference between this comparative example and embodiment 1 is that the buffer plate is made of pure foaming material, PP material is selected, the density is 100 kg / m3, and the thickness is 3.5 mm.

[0079] The experimental items include: water absorption rate, tensile strength, deformation amount after drop hammer impact and bending strength test.

[0080] Water absorption rate experiment

[0081] I. The samples of examples 1 to 4 and comparative examples 1 and 2 are prepared, weighed and the initial weight M1 of each sample is recorded. II. Each sample is completely immersed in water for a period of time until each sample no longer absorbs water. III. Each sample is taken out, the surface water is wiped off with absorbent paper, and then each sample is weighed again to obtain the weight M2. IV. The water absorption rate is calculated as (M2-M1) / M1.

[0082] The tensile strength experiment is carried out according to standard GB / T1447-2005; the deformation amount after drop hammer impact experiment is carried out according to standard ASTM D7136, and the bending strength experiment is carried out according to standard GB / T1449-2005. The data obtained by testing each example and comparative example are as follows:

[0083]

[0084] From the above table, it can be seen that the water absorption rate of the buffer plates prepared in examples 1 to 4 is all below 0.1%, the tensile strength is all above 52 MPa, the deformation amount after drop hammer impact is all below 20 mm, and the bending strength is all above 20 MPa, and each performance index is higher than that of comparative examples 1 and 2.

[0085] Compared with Example 2, the tensile strength and the bending strength of Example 1 are both improved, the deformation after the drop hammer impact is reduced, and the water absorption is reduced. This shows that the increase of the number of the continuous fiber reinforced resin composite material layers has a good effect on improving the structural strength and reducing the water absorption.

[0086] Compared with Comparative Example 1, the tensile strength and the bending strength of Examples 1, 3 and 4 are both greatly improved, the deformation after the drop hammer impact is reduced, and the water absorption is reduced. This shows that the projection of the fiber length direction of the adjacent layers on the horizontal plane has a certain angle, compared with the parallel arrangement, which has a good effect on improving the structural strength and reducing the water absorption.

[0087] Compared with Comparative Example 2, the tensile strength and the bending strength of Example 1 are both greatly improved, the deformation after the drop hammer impact is significantly reduced, and the water absorption is significantly reduced. This shows that the setting of the protective layer on the outside of the foaming material can greatly improve the structural strength and reduce the water absorption.

[0088] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, on the basis of the above description, other different forms of changes or variations can be made. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A bumper panel for connection with a battery undertray, characterised in that: The foam material layer (1) is connected with a protective layer (2) on its upper and lower surfaces, respectively, and the protective layer (2) comprises a plurality of continuous fiber reinforced resin composite layers (21), and the projection of the fiber length direction of two adjacent continuous fiber reinforced resin composite layers (21) on the horizontal plane has an included angle.

2. The bumper panel for connection with a battery skid plate of claim 1, wherein: The protective layer (2) comprises an even number of continuous fiber reinforced resin composite layers (21), and each continuous fiber reinforced resin composite layer (21) is symmetrically arranged along the middle surface of the protective layer (2); or the protective layer (2) comprises an odd number of continuous fiber reinforced resin composite layers (21), and each continuous fiber reinforced resin composite layer (21) is symmetrically arranged along the middle continuous fiber reinforced resin composite layer (21).

3. The bumper beam for connection with a battery skid plate of claim 1, wherein: The included angle ranges from 20° to 90°.

4. The bumper beam for connection with a battery skid plate of claim 1, wherein: The side edges of the foam material layer (1) and the protective layer (2) are further connected with an edge sealing plate (4).

5. The bumper beam for connection with a battery skid plate of claim 4, wherein: The edge sealing plate (4) comprises a continuous fiber reinforced resin composite layer (21).

6. The bumper beam for connection with a battery skid plate of claim 4, wherein: The upper and lower ends of the edge sealing plate (4) are provided with positioning protrusions (42) extending towards the protective layer (2) in the horizontal direction, and the side edges of the protective layer (2) are provided with positioning recesses (22) corresponding to the positions of the positioning protrusions (42), and the positioning protrusions (42) and the positioning recesses (22) are matched and connected.

7. The bumper beam for connection with a battery skid plate of claim 4, wherein: The foam material layer (1) and the protective layer (2) are connected by hot melting, and the edge sealing plate (4) is connected with the side edges of the foam material layer (1) and the protective layer (2) by hot melting.

8. The bumper beam for connection with a battery skid plate of claim 1, wherein: The foam material layer (1) and the protective layer (2) are connected with an adhesive layer (3).

9. The bumper beam for connection with a battery skid plate of claim 1, wherein: The thickness of the foam material layer (1) is 2.0mm-10.0mm, and the thickness of the protective layer (2) is 0.15mm-0.60mm.

10. A battery pack, characterized by: The buffer plate for connecting with the battery bottom guard plate is adopted. The thickness of the foam material layer (1) is 2.0mm-10.0mm, and the thickness of the protective layer (2) is 0.15mm-0.60mm.

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