Bottom protection plate, battery box body, battery pack and vehicle

Abstract

The utility model relates to the technical field of vehicles, in particular to a bottom protection plate, a battery box body, a battery pack and a vehicle. The bottom protection plate comprises a shell, a reinforcing assembly and a foam structure, the shell is provided with a containing cavity, the side, at least deviating from the box body, of the shell is provided with a protrusion, and the reinforcing assembly is arranged in the containing cavity; the foam structure is arranged in the containing cavity, the reinforcing assembly is arranged in the foam structure, and the foam structure is attached to the inner wall of the shell. Due to the fact that the protrusions are at least arranged on the side, away from the box body, of the shell, and the protrusions protrude out of the shell, when an obstacle impacts the bottom protection plate, the obstacle impacts the protrusions preferentially, and therefore the protrusions are impacted firstly and transmit impact force to the foam structure. The probability that an obstacle collides with the position, only provided with the foam structure, of the bottom protection plate can be reduced, and the bottom protection plate is prevented from being collided and deformed.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field especially relates to a bottom guard plate, battery box, battery package and vehicle. BACKGROUND

[0002] In the new energy vehicle with battery device, the battery device can be used to provide power wholly or partially. The box body is an important component of the battery device, which plays a role in containing and protecting the internal battery monomer assembly. The box body includes a box main body, a support pad and a bottom guard plate, wherein the support pad and the bottom guard plate are located at the bottom of the box main body. When the bottom of the vehicle collides with an obstacle during driving, the collision impact will be transmitted to the bottom guard plate of the battery device. The bottom guard plate can prevent the impact from being transmitted to the battery. However, the support pad and the bottom guard plate are separately arranged, which needs to be separately processed, resulting in complex overall process of the battery. In addition, due to the independent manufacturing of the two, local assembly cannot be fitted, resulting in the bottom guard plate being unable to transmit the impact after being locally impacted.

[0003] Therefore, the related technology provides a bottom guard plate with foaming glue, which can paste the foaming layer capable of relieving impact and the shell as a whole by foaming. However, the bottom of the bottom guard plate is a plane, and after being impacted by an obstacle, the impact is directly applied to the position where no reinforcing ribs are arranged on the bottom guard plate, and the bottom guard plate is prone to deformation.

[0004] Therefore, there is an urgent need for a bottom guard plate to solve the above technical problems. INVENTION CONTENTS

[0005] The utility model aims at providing a bottom guard plate, a battery box, a battery package and a vehicle, which can reduce the deformation of the bottom guard plate and effectively absorb impact.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] In the first aspect, a bottom guard plate is provided, comprising:

[0008] An outer shell has a containing cavity, and the outer shell is provided with a protrusion on at least one side away from the box main body;

[0009] A reinforcing assembly is arranged in the containing cavity;

[0010] A foam structure is arranged in the containing cavity, the reinforcing assembly is arranged in the foam structure, and the foam structure is fitted with the inner wall of the outer shell.

[0011] As a preferred technical solution of the above-mentioned bottom guard plate, the protrusion is formed by bending the outer shell outward, and the projection of the reinforcing assembly on the outer shell overlaps the projection of the protrusion on the outer shell in a direction perpendicular to the outer shell.

[0012] As a preferred technical scheme of the bottom protection plate, the reinforcing assembly comprises a plurality of reinforcing plates arranged at intervals.

[0013] As a preferred technical scheme of the bottom protection plate, the reinforcing plate is in an I-shaped or H-shaped cross section.

[0014] As a preferred technical scheme of the bottom protection plate, the reinforcing plate is arranged along the length direction of the shell.

[0015] As a preferred technical scheme of the bottom protection plate, the reinforcing plate is a continuous glass fiber pultruded profile structure.

[0016] As a preferred technical scheme of the bottom protection plate, the shell comprises a first skin and a second skin, the first skin and the second skin are fixedly connected to form the accommodating cavity, the first skin is used to be attached to the bottom wall of the box body, and the second skin is provided with the protrusion.

[0017] As a preferred technical scheme of the bottom protection plate, among the first skin and the second skin, one is a flat plate structure, and the other has a groove for accommodating the reinforcing assembly and the foam structure.

[0018] As a preferred technical scheme of the bottom protection plate, among the first skin and the second skin, the one provided with the groove further has a connecting plate extending away from the groove.

[0019] As a preferred technical scheme of the bottom protection plate, the first skin is provided with a plurality of first mounting holes, the second skin is provided with a plurality of second mounting holes, the plurality of first mounting holes and the plurality of second mounting holes are one-to-one corresponding, and reinforcing members are arranged in the first mounting holes and the second mounting holes.

[0020] As a preferred technical scheme of the bottom protection plate, the thickness of the first skin and / or the thickness of the second skin is 0.8-3.0 mm.

[0021] As a preferred technical scheme of the bottom protection plate, the first skin and / or the second skin is a continuous glass fiber reinforced composite material plate.

[0022] In a second aspect, a battery box body is provided, comprising a box body and the bottom protection plate according to any one of the above-mentioned schemes, the bottom protection plate is located at the bottom of the box body, and the bottom protection plate is fixedly connected with the box body.

[0023] As a preferred technical scheme of the battery box body, the shape of the bottom protection plate matches the shape of the box body.

[0024] In a third aspect, a battery pack is provided, comprising a battery module and the battery box of any of the above solutions, wherein the battery module is arranged in the battery box.

[0025] In a fourth aspect, a vehicle is provided, comprising the battery pack of the above solution.

[0026] The battery pack has at least the following beneficial effects:

[0027] The bottom guard plate, the battery box, the battery pack and the vehicle have the following beneficial effects: the protrusion is arranged on the side of the shell away from the box body, and the protrusion protrudes from the shell; when an obstacle impacts the bottom guard plate, the obstacle will first impact the protrusion, so that the protrusion first receives the impact and transmits the impact force to the foam structure; compared with the prior art, the probability of impact of the obstacle on the position where only the foam structure is arranged on the bottom guard plate is reduced, and deformation of the bottom guard plate caused by impact is avoided; in addition, the reinforcing assembly is arranged in the accommodating cavity of the shell to reinforce the shell; the reinforcing assembly is arranged in the foam structure, and the reinforcing assembly can receive external impact to avoid deformation of the bottom guard plate as a whole after the bottom guard plate is impacted by external impact; the foam structure is arranged in the accommodating cavity of the shell, so that the foam structure is attached to the inner wall of the shell to absorb vibrations transmitted by the shell, avoid rigid contact between the shell and the box body, and play a buffering role; the foam structure plays the role of the support pad in the prior art; compared with the prior art in which the bottom guard plate and the support pad are designed separately, the foam structure can be attached to the inner wall of the shell for assembly, efficient force transmission and coupled stress are achieved; in addition, the bottom guard plate integrates the bottom guard plate and the support pad in the prior art, and manufacturing and assembly processes are saved. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the utility model, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the utility model and these drawings without paying creative labor.

[0029] Figure 1 The first view of the bottom guard plate provided by the embodiments of the utility model;

[0030] Figure 2 The front view of the bottom guard plate provided by the embodiments of the utility model;

[0031] Figure 3 The exploded schematic view of the bottom guard plate provided by the embodiments of the utility model;

[0032] Figure 4A-A is a cross-sectional view of the second skin provided with the reinforcing assembly of the embodiment of the present utility model;

[0033] Figure 5 For Figure 2 A-A is a cross-sectional view of the second skin provided with the reinforcing assembly of the embodiment of the present utility model;

[0034] Figure 6 A-A is a cross-sectional view of the second skin provided with the reinforcing assembly of the embodiment of the present utility model;

[0035] Figure 7 A-A is a cross-sectional view of the second skin provided with the reinforcing assembly of the embodiment of the present utility model;

[0036] Figure 8 A-A is a cross-sectional view of the second skin provided with the reinforcing assembly of the embodiment of the present utility model.

[0037] In the figure,

[0038] 1, shell; 11, first skin; 111, first mounting hole; 12, second skin; 121, second mounting hole; 13, protrusion; 14, reinforcing member; 2, reinforcing assembly; 3, foam structure; 10, bottom guard plate. DETAILED DESCRIPTION

[0039] The present utility model will be further described in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, and not to limit the present utility model. In addition, it should be noted that, in order to facilitate the description, only the parts related to the present utility model are shown in the drawings, not all the structures.

[0040] In the description of the present utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present utility model can be understood according to the specific circumstances.

[0041] In the utility model, unless otherwise expressly provided and limited, the first feature is "on" or "under" the second feature, which can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "on the surface of" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0042] In the description of the embodiment, the terms "upper", "lower", "right", "left", "horizontal", "vertical", and other orientation or position relations are based on the orientation or position relations shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.

[0043] The utility model provides a bottom guard plate can reduce the deformation of bottom guard plate, effectively absorbs impact.

[0044] As Figures 1 to 3 As shown in the figure, the bottom guard plate 10 provided by the embodiment comprises an outer shell 1, a reinforcing assembly 2 and a foam structure 3, wherein the outer shell 1 has a containing cavity, the outer shell 1 is provided with a protrusion 13 at least away from one side of the box body, the reinforcing assembly 2 is arranged in the containing cavity; the foam structure 3 is arranged in the containing cavity, the reinforcing assembly 2 is arranged in the foam structure 3, and the foam structure 3 is attached to the inner wall of the outer shell 1.

[0045] Due to the fact that the shell 1 is provided with the protrusion 13 at least on the side away from the box body, the protrusion 13 is arranged to protrude from the shell 1, when the obstacle impacts the bottom guard plate 10, the obstacle will preferentially impact the protrusion 13, so that the protrusion 13 first receives the impact and transmits the impact force to the foam structure 3, compared with the prior art, the probability of the obstacle impacting the position where only the foam structure 3 is arranged on the bottom guard plate 10 can be reduced, and the deformation of the bottom guard plate caused by the impact can be avoided. In addition, the reinforcing assembly 2 is arranged in the accommodating cavity of the shell 1 to achieve the purpose of reinforcing the shell 1, the reinforcing assembly 2 is arranged in the foam structure 3, and the reinforcing assembly 2 can receive the external impact to avoid the deformation of the bottom guard plate 10 as a whole after the bottom guard plate 10 is impacted by the external impact. Since the foam structure 3 is arranged in the accommodating cavity of the shell 1, the foam structure 3 is attached to the inner wall of the shell 1 to absorb the vibration transmitted by the shell 1, so that the rigid contact between the shell 1 and the box body is avoided, and the buffering effect is achieved. The foam structure 3 plays the role of the supporting pad in the prior art, compared with the separate design of the bottom guard plate 10 and the supporting pad in the prior art, the foam structure 3 can be attached to the inner wall of the shell 1 to realize efficient force transmission and coupled stress. In addition, the bottom guard plate 10 provided by the utility model integrates the bottom guard plate and the supporting pad in the prior art, and the manufacturing process and the assembly process are saved.

[0046] Specifically, the protrusion 13 is formed by outwardly bending the shell 1, in a direction perpendicular to the shell 1, the projection of the reinforcing assembly 2 on the shell 1 overlaps the projection of the protrusion 13 on the shell 1. That is, the protrusion 13 is formed by outwardly bending the shell 1, and the shell 1 inwardly forms a bending groove, the reinforcing assembly 2 is arranged in the bending groove, so that when the protrusion 13 is impacted by the obstacle, the impact force is first transmitted to the reinforcing assembly 2, the reinforcing assembly 2 has high strength and can resist deformation caused by the impact force after being impacted, thereby reducing the deformation ability of the bottom guard plate 10 as a whole.

[0047] Specifically, as shown in Figure 4 The number of the reinforcing plates is multiple, and the specific number of the reinforcing plates is selected according to the bottom area of the battery pack. For example, the reinforcing plate is a continuous glass fiber pultrusion profile structure, wherein the reinforcing plate can be designed as a solid cross section or a hollow cross section, as long as the supporting effect can be achieved.

[0048] In some embodiments, the reinforcing plates are arranged along the length direction of the shell 1. In this way, more reinforcing plates can be arranged in the accommodating cavity, further improving the overall strength of the bottom guard plate 10. It can be understood that the reinforcing plates are arranged at a certain interval in the accommodating cavity, so that the impact on the battery pack from the bottom can be effectively alleviated. Based on the functional requirements of the bottom of the battery pack, the width and interval of the reinforcing plates can be flexibly matched and adjusted. Since the inner cavity of the bottom guard plate 10 is filled with structural foam in addition to the reinforcing plates, the material and performance of the structural foam are similar to those of the traditional support pad. In this way, the bottom guard plate 10 forms a high-strength overall structure while also having the ability to absorb impact.

[0049] In other embodiments, the reinforcing plates can be arranged along the width direction of the shell 1.

[0050] The cross section of the reinforcing plate is in the shape of a trapezoid, and the corners of the reinforcing plate are rounded. In this way, the contact area between the reinforcing plate and the foam structure 3 can be increased, and the connection between the reinforcing plate and the foam structure 3 after foaming of the foam structure 3 is more firm.

[0051] As shown in Figure 6 and Figure 7 , the cross section of the reinforcing plate is in the shape of an I or H. The I-shaped reinforcing plate can increase the contact area with the shell 1, which is conducive to force transmission and has higher resistance to deformation. The H-shaped reinforcing plate has an increased contact area between the large end and the shell 1, which is also conducive to force transmission and has higher resistance to deformation. It should be noted that the large end of the H-shaped reinforcing plate is located in the bending groove.

[0052] In other embodiments, the reinforcing assembly 2 includes reinforcing ribs in a net-like structure. The area surrounded by the reinforcing ribs is filled with foam material, and the area surrounded by the reinforcing ribs and the shell 1 is also filled with foam. In this way, the accommodating cavity can be filled with the foam structure 3 in addition to the reinforcing assembly 2, so that the foam structure 3 is completely attached to the inner wall of the shell 1 everywhere, achieving efficient transmission of impact force and coupling of stress.

[0053] It should be noted that the foam structure 3 is completely fixed after forming and the reinforcing assembly 2 is non-detachably arranged.

[0054] In some embodiments, referring to Figure 3 , Figures 5 to 8The shell 1 includes a first skin 11 and a second skin 12, the first skin 11 and the second skin 12 are fixedly connected to form a containing cavity, so as to facilitate the manufacture of the shell 1, and facilitate the installation of the reinforcing assembly 2 in the containing cavity formed by the shell 1. It should be noted that the first skin 11 and the second skin 12 are continuous glass fiber reinforced composite material plates. Of course, in other embodiments, the first skin 11 or the second skin 12 is a continuous glass fiber reinforced composite material plate. Since the continuous glass fiber reinforced composite material is a high-strength, high-rigidity, high-toughness, recyclable material, it has considerable strength, is lighter in weight, and has higher energy absorption capacity compared with steel and aluminum alloy; compared with thermosetting composite material, it is easier to process and is environmentally friendly and recyclable. By using the material to obtain the first skin 11 and the second skin 12, the overall weight of the bottom guard plate 10 can be light, has a certain strength, and can be recycled and reused.

[0055] As shown in Figure 6 , the first skin 11 is attached to the bottom wall of the box body, and the second skin 12 is bent away from the box body to form a protrusion 13, that is, the protrusion 13 is actually an integral molding structure with the shell 1. This facilitates manufacturing, saves manufacturing processes, and reduces the height installation requirements of the bottom guard plate 10.

[0056] For example, the reinforcing assembly 2 includes a plurality of reinforcing plates, and the protrusion 13 is arranged in one-to-one correspondence with the reinforcing plates. In a direction perpendicular to the shell 1, the projection of the reinforcing plate on the first skin 11 overlaps the projection of the protrusion 13 on the first skin 11, that is, while the second skin 12 is bent outward to form the protrusion, it is bent inward to form a bending groove, and the reinforcing plate is placed in the bending groove. When an obstacle impacts the bottom guard plate 10, the height causes the obstacle to impact the protrusion 13 first, and the reinforcing plate can withstand the impact force and resist deformation.

[0057] It should be noted that the shape of the protrusion 13 matches the shape of the reinforcing assembly 2 to ensure that part of the reinforcing assembly 2 can be located in the bending groove.

[0058] In other embodiments, as shown in Figure 7 , the first skin 11 and the second skin 12 both form a protrusion 13 away from the side of the reinforcing assembly 2, and the two sides of the reinforcing assembly 2 respectively enter the area surrounded by the inner walls of the two protrusions 13. In this way, when an obstacle impacts the bottom guard plate 10, it will impact the lower protrusion 13 first, the protrusion 13 will transmit the force to the reinforcing assembly 2, the reinforcing assembly 2 will then transmit the force to the foam structure 3 to be absorbed, and the protrusion 13 above the reinforcing assembly 2 is attached to the bottom of the box body. In this way, the contact area of the bottom guard plate 10 and the box body can be reduced, the force transmission can be reduced, and the box body can be further protected.

[0059] In some embodiments, continuing to refer to Figure 3 , Figure 5 and Figure 8One of the first skin 11 and the second skin 12 is a flat plate structure, and the other has a recess accommodating the reinforcing assembly 2 and the foam structure 3. The flat plate structure can cover the opening of the recess, thereby forming a receiving cavity of the shell 1, and the recess can facilitate assembly of the reinforcing assembly 2 and the foam structure 3.

[0060] For example, the second skin 12 has a recess, and the reinforcing assembly 2 and the foam structure 3 are located in the recess.

[0061] The first skin 11 and the second skin 12 are directly bonded after forming, without the need for additional connecting pieces, further simplifying the manufacturing process.

[0062] In some embodiments, as shown in Figure 5 The first skin 11 is provided with a plurality of first mounting holes 111, and the second skin 12 is provided with a plurality of second mounting holes 121, which are one-to-one corresponding. As shown in Figure 8 The first mounting hole 111 and the second mounting hole 121 are provided with a reinforcing piece 14. The reinforcing piece 14 is provided with a through hole for the fastener to pass through, which can avoid the local crushing of the shell 1 when the bottom guard plate 10 is connected to the box body. Since the first skin 11, the second skin 12 and the foam structure 3 have low strength, the fastener directly passing through will cause local deformation of the shell 1 and the foam structure 3, and the arrangement of the reinforcing piece 14 can improve the stress capacity of the shell 1 and avoid local deformation of the shell 1. The box body and the bottom guard plate 10 are fixedly connected by the fastener, which can be a screw or a rivet. The assembly and connection of the box body and the bottom guard plate 10 are achieved by a screw gun or a rivet gun, which improves the assembly efficiency.

[0063] In other embodiments, the first skin 11 and the second skin 12 both have recesses accommodating the reinforcing assembly 2 and the foam structure 3. The first skin 11 and the second skin 12 are oppositely arranged, so that the recesses in the first skin 11 and the recesses in the second skin 12 can form a receiving cavity. The first skin 11 and the second skin 12 both have connecting plates, and the connecting plates of the first skin 11 and the second skin 12 are fixedly connected by fasteners.

[0064] In some embodiments, the thickness of the first skin 11 and the thickness of the second skin 12 are both 0.8mm-3.0mm. For example, the thickness of the first skin 11 can be 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm or 3.0mm, which is not specifically limited in the present embodiment. For example, the thickness of the second skin 12 can be 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm or 3.0mm, which is not specifically limited in the present embodiment. When the thickness of the first skin 11 is 0.8mm, the thickness of the bottom guard plate 10 can be thin, and when the thickness of the first skin 11 is 3.0mm, the bottom guard plate 10 has good impact resistance. When the thickness of the second skin 12 is 0.8mm, the thickness of the bottom guard plate 10 can be thin, and when the thickness of the second skin 12 is 3.0mm, the bottom guard plate 10 has good impact resistance. It should be noted that the thickness of the first skin 11 and the thickness of the second skin 12 can be the same or different, as long as the thickness is within the range of 0.8mm-3.0mm.

[0065] In manufacturing, the reinforcing assembly 2 is first placed in the mold, and then the foaming material is added in the mold for foaming. In this way, the foaming material is foamed to obtain a foam structure 3 with the reinforcing assembly 2 embedded therein. Then, the reinforcing member 14 is placed in the mold, and the continuous glass fiber reinforced composite material is injected to form the first skin 11 and the second skin 12. The first skin 11 and the second skin 12 are bonded during the forming process. The reinforcing member 14 is embedded in the first skin 11 and the second skin 12. The first skin 11 and the second skin 12 are also attached to the side wall of the foam structure 3 during the forming process, so that the obtained outer shell 1, reinforcing assembly 2 and foam structure 3 are fixedly attached.

[0066] The embodiment of the utility model provides a battery box body, including box main part and the bottom guard plate 10 that the utility model embodiment provides, bottom guard plate 10 is located the bottom of box main part. Bottom guard plate 10 is connected with box main part fixedly through the mode of bolt connection. Since the shell 1 is provided with the protruding 13 at least on the side away from the box main part, the protruding 13 is set out of the shell 1, when the obstacle and bottom guard plate 10 produce impact, the obstacle will preferentially hit the protruding 13, the protruding 13 first receives the impact and transmits the impact force to the foam structure 3, compared with prior art, can reduce the probability of obstacle and bottom guard plate 10 only set up the position of foam structure 3 impact, reduce bottom guard plate 10 is impacted and deforms. In addition, since the reinforcing assembly 2 is located in the containing cavity of shell 1 can realize the purpose of reinforcing the shell 1, reinforcing assembly 2 is set up in the foam structure 3, after bottom guard plate 10 is impacted by external impact, reinforcing assembly 2 can accept external impact and avoid the overall deformation of bottom guard plate 10, since the foam structure 3 is set up in the containing cavity of shell 1, so that the foam structure 3 and the inner wall of shell 1 fit can absorb the vibration of shell 1 transmission, avoid the rigid contact of shell 1 and box main part, play the role of buffer, the foam structure 3 plays the role of support pad in prior art, compared with the split design of bottom guard plate and support pad in prior art, can make the foam structure 3 and the inner wall of shell 1 fit assembly, realize efficient force transmission and coupling stress. In addition, the bottom guard plate 10 provided by the utility model integrates the bottom guard plate and support pad in prior art, saves manufacturing process and assembly process.

[0067] In order to protect the box main body, avoid the battery being extruded and deformed, the shape of bottom guard plate 10 matches the shape of box main body. In this way, the box body can be comprehensively protected, and the safety of the battery is improved.

[0068] The utility model discloses an embodiment further provides a battery pack, including battery module and battery box, battery module sets up in battery box. Because battery box includes box main part and sets up the bottom guard plate 10 of box main part bottom, because the shell 1 is provided with the protruding 13 at least on the side away from the box main part, the protruding 13 is set out from the shell 1, when the obstacle and the bottom guard plate 10 produce impact, the obstacle will preferentially hit the protruding 13, in this way, the protruding 13 first accepts the impact and transmits the impact force to the foam structure 3, compared with prior art, can reduce the probability of obstacle and the bottom guard plate 10 only set up the position of foam structure 3 impact, avoid the bottom guard plate 10 and be impacted deformation. In addition, because the reinforcing assembly 2 is located in the containing cavity of the shell 1 can realize the purpose of reinforcing the shell 1, the reinforcing assembly 2 is set up in the foam structure 3, after the bottom guard plate 10 is impacted by outside, the reinforcing assembly 2 can accept outside impact and avoid the overall deformation of the bottom guard plate 10, because the foam structure 3 is set up in the containing cavity of the shell 1, in this way, the foam structure 3 and the inner wall of the shell 1 are attached and can absorb the vibration of the shell 1 transmission, avoid the rigid contact of the shell 1 and the box main part, play the role of buffering, the foam structure 3 plays the role of support pad in prior art, compared with the split design of the bottom guard plate and support pad in prior art, can make the foam structure 3 and the inner wall of the shell 1 fit assembly, realize efficient force transmission and coupling stress. In addition, the bottom guard plate 10 provided by the utility model integrates the bottom guard plate and support pad in prior art, saves manufacturing procedure and assembly procedure.

[0069] The utility model discloses an embodiment further provides a vehicle, including battery pack. The battery box of battery pack includes box main part and sets up the bottom guard plate 10 of box main part bottom, because the shell 1 is provided with the protruding 13 at least on the side away from the box main part, the protruding 13 is set out from the shell 1, when the obstacle and the bottom guard plate 10 produce impact, the obstacle will preferentially hit the protruding 13, in this way, the protruding 13 first accepts the impact and transmits the impact force to the foam structure 3, compared with prior art, can reduce the probability of obstacle and the bottom guard plate 10 only set up the position of foam structure 3 impact, reduce the bottom guard plate 10 and be impacted deformation. In addition, because the reinforcing assembly 2 is located in the containing cavity of the shell 1 can realize the purpose of reinforcing the shell 1, the reinforcing assembly 2 is set up in the foam structure 3, after the bottom guard plate 10 is impacted by outside, the reinforcing assembly 2 can accept outside impact and avoid the overall deformation of the bottom guard plate 10, because the foam structure 3 is set up in the containing cavity of the shell 1, in this way, the foam structure 3 and the inner wall of the shell 1 are attached and can absorb the vibration of the shell 1 transmission, avoid the rigid contact of the shell 1 and the box main part, play the role of buffering, the foam structure 3 plays the role of support pad in prior art, compared with the split design of the bottom guard plate and support pad in prior art, can make the foam structure 3 and the inner wall of the shell 1 fit assembly, realize efficient force transmission and coupling stress. In addition, the bottom guard plate 10 provided by the utility model integrates the bottom guard plate and support pad in prior art, saves manufacturing procedure and assembly procedure.

[0070] In addition, the above are only the preferred embodiments of the present application and the principles of the technology used. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A bottom protection plate installed at a bottom of a case main body of a battery case, characterized by, include: The outer shell (1) has a receiving cavity, and the outer shell (1) has a protrusion (13) on at least one side away from the main body of the box; The reinforcing component (2) is disposed within the receiving cavity; A foam structure (3) is disposed within the cavity, and a reinforcing component (2) is disposed within the foam structure (3). The foam structure is attached to the inner wall of the outer shell (1).

2. The underguard of claim 1, wherein, The protrusion (13) is formed by bending the outer shell (1) outward. In a direction perpendicular to the outer shell (1), the projection of the reinforcing component (2) on the outer shell (1) overlaps with the projection of the protrusion (13) on the outer shell (1).

3. The underguard of claim 1, wherein, The reinforcing component (2) includes multiple reinforcing plates spaced apart.

4. The underpan according to claim 3, characterized in that The cross-section of the reinforcing plate is I-shaped or T-shaped.

5. The underpan according to any one of claims 1-4, characterized in that The outer shell (1) includes a first skin (11) and a second skin (12). The first skin (11) and the second skin (12) are fixedly connected to form the receiving cavity. The first skin (11) is used to fit against the bottom wall of the box body. The second skin (12) is provided with the protrusion (13).

6. The underpan according to claim 5, characterized in that Of the first skin (11) and the second skin (12), one is a flat plate structure and the other has a groove for accommodating the reinforcing component (2) and the foam structure (3).

7. The underpan according to claim 5, characterized in that The first skin (11) is provided with a plurality of first mounting holes (111), and the second skin (12) is provided with a plurality of second mounting holes (121). The plurality of first mounting holes (111) and the plurality of second mounting holes (121) are provided in a one-to-one correspondence. The first mounting holes (111) and the second mounting holes (121) are provided with reinforcement members (14).

8. A battery case characterized by It includes a box body and a bottom protective plate (10) as described in any one of claims 1-7, wherein the bottom protective plate (10) is located at the bottom of the box body and is fixedly connected to the box body.

9. A battery pack, characterized by It includes a battery module and a battery housing as described in claim 8, wherein the battery module is disposed within the battery housing.

10. Vehicle, characterized in that Includes the battery pack as described in claim 9.

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