Bottom protection plate and battery box body

Abstract

The utility model relates to the technical field of batteries, and provides a bottom protection plate and a battery box body. The bottom protection plate comprises a plate main body, a connecting flange arranged on the periphery of the plate main body, and a first reinforcing part and a second reinforcing part which are arranged on the plate main body, the connecting turnups comprise two first turnups which are oppositely arranged in the width direction of the plate main body and two second turnups which are oppositely arranged in the length direction of the plate main body; the second reinforcing part comprises a first reinforcing section connected with the first reinforcing part and the first flanges, and a second reinforcing section connected with the first reinforcing part and the second flanges; an embedded area is formed on the plate body, at least part of the embedded area is located in the first reinforcing part, and the embedded area is located on the connecting line of the first reinforcing sections on the two sides and the first reinforcing part, and / or the embedded area is located on the connecting line of the second reinforcing sections on the two sides and the first reinforcing part. The bottom protection plate disclosed by the utility model has better structural strength and can effectively resist collision impact, so that the safety and the NVH (Noise Vibration and Harshness) performance of the battery pack can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, especially a bottom guard plate, and simultaneously, the utility model relates to a battery box body with the bottom guard plate. BACKGROUND

[0002] With the rapid growth of the electric vehicle market, in the new energy vehicle field, the battery pack as the core component, its safety and reliability directly affect the overall performance of the vehicle. The current battery pack bottom guard plate design generally has the problem of insufficient rigidity, which leads to deformation of the bottom guard plate, abnormal noise, insufficient protection under complex road conditions or collision, thereby affecting the safety of the battery pack and the driving experience of the whole vehicle. SUMMARY

[0003] Therefore, the utility model aims at providing a bottom guard plate which is beneficial to improving the safety quality of the battery pack.

[0004] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0005] A bottom guard plate comprises a plate main body, a connecting flange arranged at the periphery of the plate main body, and a first reinforcing portion and a second reinforcing portion arranged on the plate main body.

[0006] The connecting flange comprises two first flanges arranged opposite to each other along the width direction of the plate main body, and two second flanges arranged opposite to each other along the length direction of the plate main body.

[0007] The second reinforcing portion comprises a first reinforcing segment connecting the first reinforcing portion and each first flange, and a second reinforcing segment connecting the first reinforcing portion and each second flange.

[0008] An embedded area is formed on the plate main body, and the embedded area is at least partially located in the first reinforcing portion, and the embedded area is located on the line connecting the first reinforcing segment on both sides and the first reinforcing portion, and / or the embedded area is located on the line connecting the second reinforcing segment on both sides and the first reinforcing portion.

[0009] Further, the first reinforcing portion is a plurality of reinforcing portions arranged at intervals along the length direction of the plate main body, and the second reinforcing segment is arranged between the adjacent two first reinforcing portions.

[0010] Further, the first reinforcing portion comprises a plurality of first reinforcing ribs arranged on the plate main body, and the first reinforcing ribs are arranged at intervals along the width direction of the plate main body. The first reinforcing segment is arranged between the adjacent two first reinforcing ribs, and the embedded area is arranged in each first reinforcing rib.

[0011] Further, the first reinforcing rib is in a "mouth" shape or a rhombus shape, and the embedding area is located in a region formed by the first reinforcing rib itself.

[0012] Further, the first reinforcing rib is in a "mouth" shape or a rhombus shape, and the embedding area is located in a region formed by the first reinforcing rib itself.

[0013] Further, the width dimension K1 of the first reinforcing rib satisfies: 20mm≤K1≤100mm; and / or, the width of the first reinforcing section and the second reinforcing section is the same, and the width dimension K2 of both satisfies: 20mm≤K2≤100mm.

[0014] Further, each of the first reinforcing sections is arranged along the width direction of the plate body and has a middle rib extending into the embedding area adjacent thereto; and / or, each of the second reinforcing sections is arranged along the length direction of the plate body and has a middle rib extending into the embedding area adjacent thereto.

[0015] Further, each of the first reinforcing ribs is protruded from the plate body to one side of the battery pack, or each of the first reinforcing ribs is protruded from the plate body away from one side of the battery pack; each of the first reinforcing sections and the second reinforcing sections is protruded from the plate body to one side, and is arranged on the same side as the first reinforcing rib.

[0016] Further, a third reinforcing part is arranged between two adjacent first reinforcing parts; the third reinforcing part is connected with the two adjacent first reinforcing parts through the second reinforcing section, the third reinforcing part is connected with each of the first flanges through the first reinforcing section, the occupied area of the third reinforcing part is smaller than that of the first reinforcing part, and / or the third reinforcing part comprises a plurality of second reinforcing ribs arranged along the width direction of the plate body, two adjacent second reinforcing ribs are connected through the first reinforcing section, and the profile dimension of each second reinforcing rib is smaller than that of each first reinforcing rib.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] The bottom protection plate is provided with the first reinforcing part and the second reinforcing part, and the second reinforcing part comprises a first reinforcing section connecting the first reinforcing part and each first flange, and a second reinforcing section connecting the first reinforcing part and each second flange, and meanwhile, the embedded area is formed on the plate main body, the embedded area is located on the line connecting the two first reinforcing sections and the first reinforcing part, and the embedded area is located on the line connecting the two second reinforcing sections and the first reinforcing part, so that the continuous reinforcing structure can be formed in the length direction and the width direction of the plate main body, the through line structure along the length direction or the width direction of the plate main body is avoided on the reinforcing structure, the optimization of the force transmission path is realized, the bottom protection plate has better structural strength, the bottom protection plate is not easy to deform under complex road conditions, and the collision impact can be effectively resisted, the battery pack is protected from damage, and therefore the safety and the NVH performance of the battery pack can be improved.

[0019] In addition, the first reinforcing rib is in the shape of a "mouth" or a rhombus, which is beneficial to arrangement on the plate main body, cooperation with the first reinforcing section and the second reinforcing section, and realization of the purpose of forming the continuous reinforcing structure in the length direction and the width direction of the plate main body, improvement of the structural strength of the bottom protection plate, and avoidance of the through line on the reinforcing structure, so that the structural strength enhancement effect is weakened. The first reinforcing rib is in the shape of a "back", so that the area of the embedded area is not too large, and the structural strength enhancement effect is not poor. The area S of the embedded area is less than or equal to 0.065 m2, so that the embedded area is not too large, and the first reinforcing rib is not too large, and the structural strength of the local area of the plate main body is insufficient.

[0020] In addition, the width size K1 of the first reinforcing rib satisfies 20 mm≤K1≤100 mm, and the width size K2 of the first reinforcing section and the second reinforcing section satisfies 20 mm≤K2≤100 mm, so that the structural reinforcing effect of the first reinforcing rib, the first reinforcing section and the second reinforcing section on the bottom protection plate is ensured. The middle rib is arranged, so that the embedded area is not too large, and the structural strength of the local area of the plate main body is insufficient. The third reinforcing part with a smaller occupied area than the first reinforcing part is arranged, so that the local strength differentiation design of the plate main body is formed. Meanwhile, the profile size of the second reinforcing rib is smaller than the profile size of the first reinforcing rib, so that the reinforcing requirement of the local structure strength of the plate main body is adjusted, and the structural strength of the whole bottom protection plate is improved.

[0021] Another purpose of the utility model lies in providing a battery box, which comprises a frame and the bottom protection plate as described above arranged at the bottom of the frame.

[0022] The battery box provided by the utility model comprises the bottom protection plate as described above, and has the same beneficial effects as the prior art, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which form a part of this patent, are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:

[0024] Figure 1 Another structural schematic view of the bottom guard plate according to the embodiment of the application;

[0025] Figure 2 The structure of the first reinforcing rib according to the embodiment of the application is shown in the view; Figure 1 The top view of the structure shown in the view;

[0026] Figure 3 The structure of the first reinforcing rib according to the embodiment of the application is shown in the view; Figure 2 The enlarged view of A in the view;

[0027] Figure 4 The structure of the first reinforcing rib according to the embodiment of the application is shown in the view;

[0028] Figure 5 The structure of the intermediate rib according to the embodiment of the application is shown in the view;

[0029] Figure 6 Another structural schematic view of the bottom guard plate according to the embodiment of the application;

[0030] Figure 7 The structure of the traditional bottom guard plate according to the embodiment of the application is shown in the view;

[0031] Legend of reference signs:

[0032] 10, plate main body; 100, embedded area;

[0033] 11, first flange; 12, second flange;

[0034] 13, first reinforcing part; 131, first reinforcing rib; 1311, first rib; 1312, second rib;

[0035] 14, second reinforcing part; 141, first reinforcing section; 142, second reinforcing section; 143, intermediate rib;

[0036] 15, third reinforcing part; 151, second reinforcing rib. DETAILED DESCRIPTION

[0037] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict.

[0038] In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular architectures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known methods, devices, and circuits are omitted so as not to obscure the description of the present application with unnecessary detail.

[0039] In the description of the present application, it should be explained that if the terms indicating the orientation or position relationship such as "upper", "lower", "inner", "outer" appear, they are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the application. In addition, if the terms "first", "second" appear, they are also only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, in the description of the present application, unless otherwise explicitly limited, the terms "mounting", "connecting", "connection", "connector" should be understood broadly. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected; 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 communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood in combination with the specific circumstances.

[0041] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0042] Embodiment one

[0043] The present embodiment relates to a bottom guard plate, which can solve the problems of insufficient structural rigidity of traditional bottom guard plates, weak resistance to external impact, easy deformation and abnormal noise during vehicle driving, and thus improve the overall structural strength of the battery pack.

[0044] As shown in the overall structure, Figures 1 to 6 The bottom guard plate of the present embodiment includes a plate body 10, a connecting flange provided at the periphery of the plate body 10, and a first reinforcing portion 13 and a second reinforcing portion 14 provided on the plate body 10. The connecting flange includes two first flanges 11 arranged opposite to each other along the width direction of the plate body 10, and two second flanges 12 arranged opposite to each other along the length direction of the plate body 10.

[0045] And, the second reinforcing portion 14 includes a first reinforcing segment 141 connecting the first reinforcing portion 13 and each first flange 11, and a second reinforcing segment 142 connecting the first reinforcing portion 13 and each second flange 12. An embedded area 100 is formed on the plate body 10, the embedded area 100 is at least partially located in the first reinforcing portion 13, and the embedded area 100 is located on the line connecting the two first reinforcing segments 141 and the first reinforcing portion 13, and the embedded area 100 is located on the line connecting the two second reinforcing segments 142 and the first reinforcing portion 13.

[0046] At this time, as set forth above, by setting the first reinforcing portion 13 and the second reinforcing portion 14, and the second reinforcing portion 14 including the first reinforcing segment 141 connecting the first reinforcing portion 13 and each first flange 11, and the second reinforcing segment 142 connecting the first reinforcing portion 13 and each second flange 12, and by forming the embedded area 100 on the plate body 10, the embedded area 100 being located on the line connecting the two first reinforcing segments 141 and the first reinforcing portion 13, and the embedded area 100 being located on the line connecting the two second reinforcing segments 142 and the first reinforcing portion 13, a continuous reinforcing structure can be formed in the length direction and the width direction of the plate body 10, and a through-line structure in the length direction or the width direction of the plate body 10 can be avoided on the reinforcing structure, so as to optimize the force transmission path, so that the underguard has better structural strength, so that it is not easy to deform under complex road conditions, and can effectively resist impact and protect the battery pack from damage, thereby facilitating improvement of the safety and NVH performance of the battery pack.

[0047] Based on the above content, in detail, in the embodiment, in the specific implementation, the connecting flanges can be two first flanges 11 and two second flanges 12 connected in the front, and the related structure parts not mentioned in the underguard can refer to the structure of the underguard, the battery box or the battery pack, which is well known to those skilled in the art, and will not be described here.

[0048] At the same time, the through-line structure described in the embodiment is the dashed line shown in Figure 7 , and the underguard in the figure is an example of a traditional underguard provided with a reinforcing protrusion. However, due to design, it is inevitable to form a through-line structure in the length direction and the width direction, and the force transmission path is a simple straight line, so that the structural strength is weak, which is not conducive to the improvement of the safety of the battery pack.

[0049] And as shown in Figure 1 , Figure 2 and Figure 6 , the underguard of the embodiment is provided with an embedded area 100, so that the continuous reinforcing structure formed by the first reinforcing portion 13 and the second reinforcing portion 14 will not form a through-line structure in the length direction or the width direction of the plate body 10. Figure 2The dotted line is intended to show the through-line structure, and obviously the first reinforcing part 13 and the second reinforcing part 14 on the bottom guard plate are not designed along the dotted line, that is, the first reinforcing part 13 and the second reinforcing part 14 do not form a through-line structure, so that the force transmission path is not a straight line but varies within a certain range, which is beneficial to optimize the local structural strength of the plate body 10, and thus the bottom guard plate has good structural strength.

[0050] Secondly, in the embodiment, the embedded area 100 can be located only on the line connecting the first reinforcing segment 141 and the first reinforcing part 13 on both sides, or the embedded area 100 can be located only on the line connecting the second reinforcing segment 142 and the first reinforcing part 13 on both sides, according to the actual structural strength requirement of the bottom guard plate, so as to meet the design requirement of the bottom guard plate with different structural strength.

[0051] Moreover, it should be noted that the direction-related expressions in the embodiment are only exemplary descriptions of the embodiment. In specific implementation, the direction expressions in the embodiment vary with the setting direction of the bottom guard plate, that is, the directions in the embodiment refer to the relative coordinate system with the bottom guard plate as the reference.

[0052] In the embodiment, as a preferred implementation form, referring to FIGS. 1 and 2, the first reinforcing part 13 is arranged on the plate body 10, and the second reinforcing part 14 is arranged on the plate body 10. Figure 1 Figure 2 In the embodiment, as a preferred implementation form, referring to FIGS. 1 and 2, the first reinforcing part 13 is arranged on the plate body 10, and the second reinforcing part 14 is arranged on the plate body 10.

[0053] Further, in specific implementation, in the embodiment, as a preferred implementation form, the first reinforcing part 13 includes a plurality of first reinforcing ribs 131 arranged on the plate body 10 along the width direction of the plate body 10, and adjacent two first reinforcing ribs 131 are connected through the first reinforcing segment 141, and each first reinforcing rib 131 is provided with the embedded area 100. In this way, it can not only avoid the large-area non-reinforced structure area of the plate body 10, but also reduce the arrangement difficulty of the first reinforcing part 13 and the design difficulty of the overall reinforcing structure of the bottom guard plate, so as to achieve the purpose of cost reduction.

[0054] Further, in the embodiment, as a preferred implementation form, referring to FIGS. 1 and 2, the first reinforcing part 13 is arranged on the plate body 10, and the second reinforcing part 14 is arranged on the plate body 10. Figure 2 Figure 3 ​​As shown, the first reinforcing rib 131 is in a "square" shape or a rhombus shape, and the embedding area 100 is located within the area formed by the self-enclosure of the first reinforcing rib 131. Thus, it is not only beneficial for its layout on the plate body 10, but also conducive to cooperation with the first reinforcing section 141 and the second reinforcing section 142, achieving the purpose of forming a continuous reinforcing structure in the length direction and width direction of the plate body 10, enhancing the structural strength of the bottom guard plate, and avoiding the formation of a through line on this reinforcing structure, resulting in the weakening of the structural strength enhancement effect.

[0055] In addition, for the first reinforcing rib 131 of this embodiment, in addition to the above-mentioned "square" shape or rhombus shape design, as a preferred implementation form, refer to Figure 4 As shown, the first reinforcing rib 131 can be in a "hui" shape, and has a first rib 1311 and a second rib 1312 located inside the first rib 1311. The embedding area 100 is located within the area between the first rib 1311 and the second rib 1312. The main advantage of such a setting is that it can avoid the embedding area 100 being too large, resulting in poor structural strength enhancement effect.

[0056] During specific implementation, the first rib 1311 can be designed in a "square" shape, and the second rib 1312 can be designed in a rectangular shape, thus forming a "hui" shape structure, which is beneficial for avoiding large areas of the plate body 10 without a reinforcing structure, resulting in weak structural strength in local areas of the bottom guard plate. Of course, the first reinforcing rib 131 of this embodiment can also be set into other structural shapes when necessary, such as other polygons like triangles, rectangles or regular pentagons.

[0057] Meanwhile, in this embodiment, as a preferred implementation form, the area S of the embedding area 100 satisfies: S ≤ 0.065 m2. And for example, it can be specifically 0.065 m2, 0.06 m2 or 0.05 m2, etc. Here, setting the area S of the embedding area 100 to ≤ 0.065 m2 is beneficial for avoiding the embedding area 100 being too large, that is, the internal area of the first reinforcing rib 131 is too large, resulting in insufficient structural strength in local areas of the plate body 10.

[0058] Secondly, also as a preferred implementation form, in this embodiment, still refer to Figure 3 As shown, the width dimension K1 of the first reinforcing rib 131 satisfies: 20 mm ≤ K1 ≤ 100 mm, and the widths of the first reinforcing section 141 and the second reinforcing section 142 are the same, and the width dimension K2 of both satisfies: 20 mm ≤ K2 ≤ 100 mm. Thus, it can be beneficial to ensure the structural strengthening effect of the first reinforcing rib 131, the first reinforcing section 141 and the second reinforcing section 142 on the bottom guard plate, and avoid the width dimensions of the three being too small to meet the structural strengthening requirements.

[0059] In the embodiment, the width dimension K1 of the first reinforcing rib 131 can be specifically 20 mm, 60 mm or 100 mm, and the width dimension K2 of the first reinforcing section 141 and the second reinforcing section 142 can also be specifically 20 mm, 60 mm or 100 mm, so as to meet the requirement of reinforcing the structural strength of the plate body 10. Of course, the width dimensions of the first reinforcing rib 131, the first reinforcing section 141 and the second reinforcing section 142 can be designed differently according to the requirement, for example, K1 can be specifically 20 mm, and K2 can be specifically 60 mm.

[0060] Similarly, in the embodiment, the width dimension K1 of the first reinforcing rib 131 can be specifically 20 mm, 60 mm or 100 mm, and the width dimension K2 of the first reinforcing section 141 and the second reinforcing section 142 can also be specifically 20 mm, 60 mm or 100 mm, so as to meet the requirement of reinforcing the structural strength of the plate body 10. Of course, the width dimensions of the first reinforcing rib 131, the first reinforcing section 141 and the second reinforcing section 142 can be designed differently according to the requirement, for example, K1 can be specifically 20 mm, and K2 can be specifically 60 mm.

[0061] In addition, in the embodiment, as a preferred implementation form, in addition to limiting the area S of the embedded area 100 to avoid the embedded area 100 being too large, as shown in FIG. 6, each first reinforcing section 141 is arranged along the width direction of the plate body 10 and has a middle rib 143 extending into the embedded area 100 adjacent thereto. Figure 5 Thus, the embedded area 100 can also be avoided from being too large, that is, the plate body 10 can be avoided from having a large area of non-reinforced structure region, so as to cause the structural strength of the local region of the bottom guard plate to be weak.

[0062] Of course, in the embodiment, as a preferred implementation form, each second reinforcing section 142 can also be arranged along the length direction of the plate body 10 and have a middle rib 143 extending into the embedded area 100 adjacent thereto. Similarly, the beneficial effect of avoiding the plate body 10 from having a large area of non-reinforced structure region can be achieved.

[0063] At the same time, in the embodiment, as a preferred implementation form, each first reinforcing rib 131 is protruded from the plate body 10 to the side of the battery pack, or each first reinforcing rib 131 is protruded from the plate body 10 away from the side of the battery pack. At this time, each first reinforcing section 141 and each second reinforcing section 142 are protruded from the plate body 10 to one side and arranged on the same side as the first reinforcing rib 131. The advantage of such arrangement is that the bottom guard plate can be made by one-piece stamping, which is beneficial to realize cost reduction design.

[0064] In addition, in the embodiment, as a preferred implementation form, as shown in FIG. 7, each first reinforcing section 141 is arranged along the length direction of the plate body 10 and has a middle rib 143 extending into the embedded area 100 adjacent thereto. Figure 6As shown, the bottom protection plate of the embodiment further comprises a third reinforcing portion 15 located between two adjacent first reinforcing portions 13. In the specific structure, the third reinforcing portion 15 is connected with the two adjacent first reinforcing portions 13 through the second reinforcing segment 142, the third reinforcing portion 15 is connected with each first flange 11 through the first reinforcing segment 141, and the occupied area of the third reinforcing portion 15 is smaller than the occupied area of the first reinforcing portion 13.

[0065] In this way, the partial strength differentiation design of the plate body 10 can be facilitated on the basis of avoiding the formation of a through-line structure along the length direction or the width direction of the plate body 10, and the structural strength of the bottom protection plate is further improved.

[0066] In the embodiment, as a preferred implementation form, the third reinforcing portion 15 comprises a plurality of second reinforcing ribs 151 arranged at intervals along the width direction of the plate body 10, two adjacent third reinforcing ribs are connected through the first reinforcing segment 141, and the contour size of each second reinforcing rib 151 is smaller than the contour size of each first reinforcing rib 131. The main advantage of this arrangement is that it can facilitate the adjustment of the strengthening requirements of the local structural strength of the plate body 10, thereby facilitating the improvement of the overall structural strength of the bottom protection plate.

[0067] Moreover, in the specific implementation of the embodiment, the third reinforcing portion 15 is particularly suitable for being arranged in the middle region of the length direction of the plate body 10, so as to cooperate with the first reinforcing portion 13 and the third reinforcing portion 15 to improve the structural strength of the middle region of the bottom protection plate, realize the differentiated design of the structural strength, and meet the requirement of high structural strength of the middle region of the bottom protection plate.

[0068] The bottom protection plate of the embodiment can form a continuous reinforcing structure in the length direction and the width direction of the plate body 10, and can avoid forming a through-line structure along the length direction or the width direction of the plate body 10 on the reinforcing structure, so as to optimize the force transmission path, improve the structural strength of the bottom protection plate, prevent the bottom protection plate from deforming under complex road conditions, effectively resist collision impact, and protect the battery pack from damage. Meanwhile, the first reinforcing rib 131, the second reinforcing rib 151, the first reinforcing segment 141, and the second reinforcing segment 142 have the advantage of being easy to arrange on components with plate-shaped regions, and are particularly suitable for bottom protection plates of different sizes, thereby having a wide range of applications.

[0069] Embodiment Two

[0070] The embodiment relates to a battery box, which comprises a frame and the bottom protection plate in embodiment one arranged at the bottom of the frame.

[0071] The battery box of the embodiment can improve the safety quality and NVH performance of the battery pack by arranging the bottom protection plate in embodiment one, thereby improving the market competitiveness of the battery pack.

[0072] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A bottom protection plate characterized in that: it comprises a plate body, a connecting flange arranged at the periphery of the plate body, and a first reinforcing portion and a second reinforcing portion arranged on the plate body; the connecting flange comprises two first flanges arranged opposite along the width direction of the plate body, and two second flanges arranged opposite along the length direction of the plate body; the second reinforcing portion comprises a first reinforcing segment connecting the first reinforcing portion and each of the first flanges, and a second reinforcing segment connecting the first reinforcing portion and each of the second flanges; an embedding area is formed on the plate body, the embedding area is at least partially located in the first reinforcing portion, and the embedding area is located on the line connecting the first reinforcing segment on one side and the first reinforcing portion, and / or the embedding area is located on the line connecting the second reinforcing segment on one side and the first reinforcing portion. 2.A bottom protection plate according to claim 1, characterized in that: the first reinforcing portion is a plurality of portions arranged at intervals along the length direction of the plate body, and adjacent two first reinforcing portions are connected by the second reinforcing segment. 3.A bottom protection plate according to claim 2, characterized in that: the first reinforcing portion comprises a plurality of first reinforcing ribs arranged on the plate body, and the plurality of first reinforcing ribs are arranged at intervals along the width direction of the plate body; adjacent two first reinforcing ribs are connected by the first reinforcing segment, and the embedding area is arranged in each first reinforcing rib. 4.A bottom protection plate according to claim 3, characterized in that: the first reinforcing rib is in the shape of a "mouth" or a rhombus, and the embedding area is located in the area formed by the first reinforcing rib itself. 5.A bottom protection plate according to claim 3, characterized in that: the first reinforcing rib is in the shape of a "turn", and has a first rib and a second rib located inside the first rib, and the embedding area is located in the area between the first rib and the second rib; and / or the area of the embedding area S≤0.065m². 6.A bottom protection plate according to claim 3, characterized in that: the width dimension K1 of the first reinforcing rib satisfies: 20mm≤K1≤100mm; and / or the width of the first reinforcing segment and the second reinforcing segment is the same, and the width dimension K2 of both satisfies: 20mm≤K2≤100mm. 7.A bottom protection plate according to claim 3, characterized in that: each first reinforcing segment is arranged along the width direction of the plate body, and has a middle rib extending into the embedding area adjacent thereto; and / or each second reinforcing segment is arranged along the length direction of the plate body, and has a middle rib extending into the embedding area adjacent thereto. 8.A bottom protection plate according to claim 3, characterized in that: each first reinforcing rib is protruded from the plate body to the side of the battery pack, or each first reinforcing rib is protruded from the plate body away from the side of the battery pack; each first reinforcing segment and each second reinforcing segment are protruded from the plate body to one side, and are arranged on the same side as the first reinforcing rib. 9.A bottom protection plate according to any one of claims 3 to 8, characterized in that: A third reinforcing portion is further included between two adjacent first reinforcing portions; The third reinforcing portion is connected with the two adjacent first reinforcing portions through the second reinforcing segments, the third reinforcing portion is connected with each first flange through the first reinforcing segment, the occupied area of the third reinforcing portion is smaller than that of the first reinforcing portion, and / or the third reinforcing portion includes a plurality of second reinforcing ribs arranged at intervals along the width direction of the plate body, two adjacent second reinforcing ribs are connected through the first reinforcing segment, and the profile size of each second reinforcing rib is smaller than that of each first reinforcing rib.

10. A battery box, characterized in that: The battery box comprises a frame, and the bottom guard plate of any one of claims 1-9 is arranged at the bottom of the frame.

Images