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 buffer plate and a reinforcing plate, the buffer plate and the reinforcing plate are both located in a containing cavity of the shell, the buffer plate can weaken impact kinetic energy transmitted to the battery pack and reduce damage to the battery pack, and the reinforcing plate supports the buffer plate, so that the bottom protection plate has the rigidity requirement and the strength requirement; the reinforcing plate and the buffering plate are matched with each other, the strength of the bottom protection plate can be improved on the premise that impact force borne by the bottom protection plate is buffered, the reinforcing plate is an integral plate, so that the rigidity of the reinforcing plate cannot be dispersed, the integral strength of the bottom protection plate can be improved, and protection dead corners or weak points of the bottom protection plate are reduced; during machining, the machining time can be shortened, the machining process is simplified, and the machining efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a bottom guard plate, a battery box, a battery pack, and a vehicle. Background Technology

[0002] In new energy vehicles equipped with battery packs, the battery packs can provide all or part of the power. The housing is an important component of the battery pack, serving to house and protect the internal battery cells. The housing includes the main body, support pads, and a bottom guard plate. The support pads and bottom guard plate are located at the bottom of the main body. When the vehicle collides with an obstacle during driving, the impact is transmitted to the bottom guard plate of the battery pack, which prevents the impact from being transferred to the battery.

[0003] However, existing bottom protection plates cannot meet the protection requirements of battery packs.

[0004] Therefore, there is an urgent need for a bottom protection plate to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this utility model is to provide a bottom protection plate, a battery box, a battery pack, and a vehicle, which can improve the overall strength of the bottom protection plate, reduce the deformation of the bottom protection plate, and meet the protection requirements of the battery.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] In a first aspect, a bottom protective plate is provided, installed on the bottom of the battery box body, comprising:

[0008] The outer shell has a receiving cavity;

[0009] A reinforcing plate is disposed within the receiving cavity;

[0010] A buffer plate is disposed within the receiving cavity. The buffer plate and the reinforcing plate are stacked together. The buffer plate is located between the reinforcing plate and the inner sidewall of the outer shell, and the buffer plate is respectively attached to the inner sidewall of the outer shell and the reinforcing plate.

[0011] As a preferred technical solution for the aforementioned bottom protective plate, the area of ​​the side wall with the largest accommodating cavity is S1, and the area of ​​the end face of the reinforcing plate is S2, wherein 0.9≤S2 / S1≤1.

[0012] As a preferred technical solution for the aforementioned bottom protective plate, the reinforcing plate has a protrusion on at least one end face, and a plurality of the protrusions are spaced apart.

[0013] As a preferred embodiment of the aforementioned bottom protective plate, the reinforcing plate has a through hole that penetrates the protrusion.

[0014] As a preferred technical solution for the aforementioned bottom protective plate, the reinforcing plate has weight-reducing holes.

[0015] As a preferred technical solution for the aforementioned bottom protective plate, the reinforcing plate is a metal stamping plate;

[0016] And / or, the buffer plate is a foam-filled plate or a foam board;

[0017] And / or, the reinforcing plate and the buffer plate are an integral structure.

[0018] As a preferred technical solution for the aforementioned bottom protective plate, the outer shell includes a first skin and a second skin. Of the first skin and the second skin, one is a flat plate structure, and the other has a groove for accommodating the reinforcing plate and the buffer plate. The first skin and the second skin are fixedly connected to cover the groove to form the accommodating cavity.

[0019] Secondly, a battery enclosure is provided, including a main body and a bottom protective plate as described above, wherein the bottom protective plate is located at the bottom of the main body and is fixedly connected to the main body.

[0020] Thirdly, a battery pack is provided, including a battery module and a battery housing as described in the above-mentioned solution, wherein the battery module is disposed within the battery housing.

[0021] Fourthly, a vehicle is provided that includes the battery pack described in the above-described solution.

[0022] This utility model has at least the following beneficial effects:

[0023] Both the buffer plate and the reinforcing plate are located within the housing cavity of the outer shell. The buffer plate and the reinforcing plate are stacked together. The buffer plate can weaken the impact kinetic energy transmitted to the battery pack and reduce the damage to the battery pack. The reinforcing plate provides support for the buffer plate, so that the bottom protection plate meets both rigidity and strength requirements. The two plates work together to improve the strength of the bottom protection plate while buffering the impact force received by the bottom protection plate. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0025] Figure 1 An exploded view of the bottom protective plate provided in an embodiment of this utility model;

[0026] Figure 2 A schematic diagram of the reinforcing plate provided in an embodiment of this utility model;

[0027] Figure 3 A partially enlarged view of the reinforcing plate provided in an embodiment of this utility model;

[0028] Figure 4 This is a schematic diagram showing the positional relationship between the bottom protective plate and the main body of the box, provided for an embodiment of this utility model.

[0029] In the picture:

[0030] 1. Reinforcing plate; 11. Protrusion; 12. Through hole; 13. Weight reduction hole; 2. Buffer plate; 3. First skin; 4. Second skin; 10. Bottom guard plate; 20. Box body. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0035] In the existing technology, the bottom guard plate is equipped with a reinforcing beam. The area where the reinforcing beam is located has high strength and can resist impact with small deformation. However, the area where the reinforcing beam is not located has general strength and high deformation after impact, which causes the battery pack located on top of the bottom guard plate to also be impacted, thus failing to meet the protection requirements of the battery pack.

[0036] Therefore, this utility model provides a bottom protective plate, which is installed on the bottom of the battery box body.

[0037] like Figure 1 As shown, the bottom protective plate includes an outer shell, a buffer plate 2 and a reinforcing plate 1. The outer shell has a receiving cavity, and the reinforcing plate 1 and the buffer plate 2 are located in the receiving cavity. The reinforcing plate 1 is disposed in the receiving cavity, and the buffer plate 2 is stacked with the reinforcing plate 1. The buffer plate 2 is located between the reinforcing plate 1 and the inner sidewall of the outer shell, and the buffer plate 2 is attached to the inner sidewall of the outer shell and the reinforcing plate 1 respectively.

[0038] Both the buffer plate 2 and the reinforcing plate 1 are located within the housing cavity of the outer casing. The buffer plate 2 can weaken the impact kinetic energy transmitted to the battery pack and reduce the damage to the battery pack. The reinforcing plate 1 provides support for the buffer plate 2, so that the bottom protection plate meets both rigidity and strength requirements. The reinforcing plate 1 and the buffer plate 2 work together to improve the strength of the bottom protection plate while buffering the impact force received by the bottom protection plate. Since the reinforcing plate 1 is a single piece of plate, its rigidity will not be dispersed, which can improve the overall strength of the bottom protection plate and reduce the protection dead angles or weak points of the bottom protection plate.

[0039] The area of ​​the reinforcing plate 1 is approximately equal to the area of ​​the receiving cavity. The area of ​​the side wall with the largest area of ​​the receiving cavity is S1, and the area of ​​the end face of the reinforcing plate 1 is S2, where 0.9 ≤ S2 / S1 ≤ 1. This arrangement can improve the overall strength of the bottom protective plate and reduce the blind spots or weak points in the bottom protective plate.

[0040] The number of reinforcing plates 1 is one, which reduces processing time, simplifies the processing process, and improves processing efficiency. Since the reinforcing plate is a single piece, its rigidity is not dispersed, which improves the overall strength of the bottom guard plate and reduces blind spots or weak points in the bottom guard plate.

[0041] In some embodiments, the buffer plate 2 is a foam-filled plate or a foam board, which can absorb external impact energy and effectively reduce the damage to the internal structure of the battery pack caused by external impact. The material of the foam-filled plate can be a foam adhesive, such as a two-component polyurethane foam adhesive. The foam adhesive has its own adhesiveness and can bond the outer shell to the reinforcing plate 1, which can improve the overall strength and has good impact resistance and buffer energy absorption. After being combined with the outer shell and the reinforcing plate 1, it can disperse local energy, so that the deformation of the bottom protection plate is small when it is hit, thereby protecting the internal structure of the battery pack from damage.

[0042] In one embodiment, the material of the buffer plate 2 can also be modified polyphenylene ether (i.e., a blend of polyphenylene ether and polystyrene). Modified polyphenylene ether has low density and high compressive strength, and has good buffering and energy absorption effects. It can absorb external impact energy and effectively reduce the damage of external impact to the internal structure of the battery pack.

[0043] In some embodiments, combined with Figure 2 and Figure 3 The reinforcing plate 1 has a protrusion 11 on at least one end face, and multiple protrusions 11 are spaced apart. The protrusions 11 can strengthen the bottom guard plate, improving its rigidity and impact resistance. For example, the protrusions 11 are formed by bending the reinforcing plate 1.

[0044] When the foaming material for manufacturing the buffer plate 2 enters from one side of the reinforcing plate 1, if the reinforcing plate 1 is flat, the foaming material cannot enter to the other side for foaming. Therefore, the reinforcing plate 1 also has through holes 12, which penetrate the corrugated protrusions 11. In this way, the foaming material can enter to the other side of the reinforcing plate 1 through the through holes 12 to form the buffer plate 2 located on the other side of the reinforcing plate 1, thereby achieving the purpose of placing the buffer plate 2 on both sides of the reinforcing plate 1.

[0045] In addition, after the foaming material is foamed, it will fill the through holes 12 to connect the buffer plates 2 located on both sides of the reinforcing plate 1 as a whole, so that the reinforcing plate 1 and the buffer plate 2 become a sandwich structure, thus achieving the purpose of connecting the reinforcing plate 1 and the buffer plate 2.

[0046] For example, a protrusion 11 is provided on one end face of the reinforcing plate 1. In other embodiments, protrusions 11 are provided on both end faces of the reinforcing plate 1. This provides optimal resistance to ball impacts and lateral compression at the bottom of the battery pack, improving the overall rigidity and impact resistance of the bottom protection plate.

[0047] The number of through holes 12 is multiple, which ensures that the foam material can quickly enter the other side, ensuring that the buffer plate 2 is formed quickly and improving manufacturing efficiency.

[0048] To reduce the overall weight of the bottom guard plate, in some embodiments, the reinforcing plate 1 has multiple weight-reducing holes 13. These holes 13 reduce the overall weight of the reinforcing plate 1. Furthermore, the weight-reducing holes 13 are arranged in an array for easy one-piece machining. For example, the weight-reducing holes 13 are elongated or circular. In other embodiments, the shape of the weight-reducing holes 13 can also be triangular or other polygonal. No specific limitation is made in this embodiment.

[0049] For example, the reinforcing plate 1 is a metal plate, specifically a metal stamping plate. The aforementioned protrusion 11 is obtained by stamping. For example, the reinforcing plate 1 is obtained by stamping a metal plate, and the weight-reducing hole 13 and the through hole 12 are formed simultaneously during the stamping process.

[0050] For example, reinforcing plate 1 is a steel plate with a thickness of d1, where 0.5mm ≤ d1 ≤ 1.0mm. The thickness d1 of reinforcing plate 1 can be selected as 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, or 1.0mm, and is not specifically limited in this embodiment. When the thickness of reinforcing plate 1 is 0.5mm, its weight is reduced accordingly while ensuring its strength, thereby reducing the overall weight of the bottom protective plate. When the thickness of reinforcing plate 1 is 1.0mm, its strength is optimal.

[0051] For example, the reinforcing plate 1 is an aluminum plate, and the thickness of the reinforcing plate 1 is d1, where 1.0mm ≤ d1 ≤ 2.0mm. The thickness d1 of the reinforcing plate 1 can be selected as 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, or 2.0mm. When the thickness of the bottom guard plate 10 is 1mm, the overall thickness of the bottom guard plate 10 can be reduced, and the weight of the bottom guard plate 10 can be reduced. When the thickness of the reinforcing plate 1 is 2mm, the strength of the reinforcing plate 1 is optimal.

[0052] In some embodiments, such as Figure 1 As shown, the outer shell includes a first skin 3 and a second skin 4. The first skin 3 and the second skin 4 are fixedly connected to form a receiving cavity, which facilitates the manufacturing of the outer shell and the installation of the reinforcing plate 1 within the receiving cavity formed by the outer shell. It should be noted that the first skin 3 and the second skin 4 are continuous glass fiber reinforced composite material plates. Of course, in other embodiments, the first skin 3 or the second skin 4 is a continuous glass fiber reinforced composite material plate. Since continuous glass fiber reinforced composite material is a high-strength, high-rigidity, high-toughness, and recyclable material, compared with steel and aluminum alloys, it can have comparable strength, lighter weight, and higher energy absorption capacity; compared with thermosetting composite materials, it is easier to process and is environmentally friendly and recyclable. Obtaining the first skin 3 and the second skin 4 from this material can make the overall weight of the bottom protection plate light, with a certain strength, and recyclable.

[0053] Of the first skin 3 and the second skin 4, one is a flat plate structure, and the other has a groove to accommodate the reinforcing plate 1 and the buffer plate 2. The first skin 3 and the second skin 4 are fixedly connected to cover the groove to form a receiving cavity. The flat plate structure can cover the opening of the groove, thereby forming the receiving cavity of the shell. The groove facilitates the assembly of the reinforcing plate 1 and the buffer plate 2.

[0054] For example, the second skin 4 has a groove, and the reinforcing plate 1 and the buffer plate 2 are located in the groove.

[0055] After the first skin 3 and the second skin 4 are formed, they can be directly glued together without the need for additional connectors, which further simplifies the manufacturing process.

[0056] In some embodiments, the first skin 3 is provided with a plurality of first mounting holes, and the second skin 4 is provided with a plurality of second mounting holes, with each of the plurality of first mounting holes corresponding to one of the plurality of second mounting holes. Fasteners pass through the first mounting holes and the second mounting holes to securely connect the first skin 3, the second skin 4, and the housing body. The housing body and the bottom protective plate are fixedly connected by fasteners. For example, the fasteners can be screws or rivets, and the assembly connection between the housing body and the bottom protective plate 10 is achieved by using a screwdriver or rivet gun, thereby improving assembly efficiency.

[0057] In some other embodiments, the first skin 3 and the second skin 4 both have grooves for accommodating the reinforcing plate 1 and the buffer plate 2. The first skin 3 and the second skin 4 are arranged opposite to each other, so that the grooves located in the first skin 3 and the grooves located in the second skin 4 can form a receiving cavity. The first skin 3 and the second skin 4 both have connecting plates, and the connecting plates of the first skin 3 and the second skin 4 are fixedly connected by fasteners.

[0058] In some embodiments, the thickness d2 of both the first skin 3 and the second skin 4 is 0.8mm ≤ d2 ≤ 3.0mm. For example, the thickness d2 of the first skin 3 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, and is not specifically limited in this embodiment. For example, the thickness of the second skin 4 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, 2.6mm, 2.7mm, 2.8mm, 2.9mm, or 3.0mm; no specific limitation is made in this embodiment. When the thickness of the first skin 3 is 0.8mm, the bottom guard plate 10 can be relatively thin; when the thickness of the first skin 3 is 3.0mm, it can provide good impact resistance for the bottom guard plate. When the thickness of the second skin 4 is 0.8mm, the bottom guard plate can be relatively thin; when the thickness of the second skin 4 is 3.0mm, it can provide good impact resistance for the bottom guard plate. It should be noted that the thickness of the first skin 3 and the thickness of the second skin 4 may be the same or different, as long as the thickness is within the range of 0.8mm-3.0mm.

[0059] Due to the arrangement of the first skin 3 and the second skin 4, the reinforcing plate 1 and the buffer plate 2 are located between the first skin 3 and the second skin 4, making the bottom protection plate a solid sandwich structure. This arrangement can provide good protection against lateral compression of the battery pack and bottom ball impact.

[0060] During manufacturing, the reinforcing plate 1 is first placed in the mold, and then foaming material is added to the mold for foaming. After the foaming material is foamed, a buffer plate 2 with the reinforcing plate 1 embedded is obtained. Continuous glass fiber reinforced composite material is injected to form the first skin 3 and the second skin 4. The first skin 3 and the second skin 4 achieve the purpose of bonding during the formation process. The first skin 3 and the second skin 4 are also attached to the side wall of the buffer plate 2 during the formation process, so that the shell, the reinforcing plate 1 and the buffer plate 2 are bonded and fixed together.

[0061] This utility model also provides a battery box, such as Figure 4As shown, the battery box includes a main body 20 and a bottom protective plate 10 provided by this utility model. The bottom protective plate 10 is located at the bottom of the main body 20 and is fixedly connected to the main body 20. The bottom protective plate 10 includes a shell, a reinforcing plate 1, and a buffer plate 2. Both the buffer plate 2 and the reinforcing plate 1 are located within the receiving cavity of the shell. The buffer plate 2 weakens the impact kinetic energy transmitted to the battery pack, reducing damage to the battery pack. The reinforcing plate 1 provides support for the buffer plate 2, ensuring that the bottom protective plate 10 meets both rigidity and strength requirements. The reinforcing plate 1 and the buffer plate 2 work together to improve the strength of the bottom protective plate 10 while buffering the impact force. Since the reinforcing plate 1 is a single piece, its rigidity is not dispersed, improving the overall strength of the bottom protective plate 10 and reducing blind spots or weak points. Furthermore, since the reinforcing plate 1 is a single piece, processing time is reduced, the processing process is simplified, and processing efficiency is improved.

[0062] This utility model also provides a battery pack, which includes a battery module and a battery housing provided by this utility model. The battery module is disposed inside the battery housing. The bottom protective plate 10 includes a shell, a reinforcing plate 1, and a buffer plate 2. Both the buffer plate 2 and the reinforcing plate 1 are located within the receiving cavity of the shell. The buffer plate 2 can weaken the impact kinetic energy transmitted to the battery pack, reducing the damage to the battery pack. The reinforcing plate 1 provides support for the buffer plate 2, enabling the bottom protective plate 10 to meet both rigidity and strength requirements. The reinforcing plate 1 and the buffer plate 2 work together to improve the strength of the bottom protective plate 10 while buffering the impact force received by the bottom protective plate 10. Since the reinforcing plate 1 is a single piece, its rigidity is not dispersed, thus improving the overall strength of the bottom protective plate 10 and reducing blind spots or weak points in its protection. Furthermore, since the reinforcing plate 1 is a single piece, it reduces processing time, simplifies the processing technology, and improves processing efficiency.

[0063] This utility model also provides a vehicle, which includes the battery pack provided by this utility model. The vehicle includes a bottom protection plate 10, which comprises a shell, a reinforcing plate 1, and a buffer plate 2. Both the buffer plate 2 and the reinforcing plate 1 are located within the receiving cavity of the shell. The buffer plate 2 weakens the impact kinetic energy transmitted to the battery pack, reducing damage to the battery pack. The reinforcing plate 1 provides support for the buffer plate 2, ensuring that the bottom protection plate 10 meets both rigidity and strength requirements. The reinforcing plate 1 and the buffer plate 2 work together to increase the strength of the bottom protection plate 10 while buffering the impact force received by the bottom protection plate 10. Since the reinforcing plate 1 is a single piece, its rigidity is not dispersed, thus improving the overall strength of the bottom protection plate 10 and reducing blind spots or weak points in its protection. Furthermore, since the reinforcing plate 1 is a single piece, it reduces processing time, simplifies the processing technology, and improves processing efficiency.

[0064] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A bottom protective plate, installed on the bottom of the battery box body (20), characterized in that, include: The outer shell has a receiving cavity; A reinforcing plate (1) is disposed within the receiving cavity; A buffer plate (2) is disposed in the receiving cavity. The buffer plate (2) and the reinforcing plate (1) are stacked together. The buffer plate (2) is located between the reinforcing plate (1) and the inner wall of the outer shell, and the buffer plate (2) is respectively attached to the inner wall of the outer shell and the reinforcing plate (1).

2. The bottom protective plate according to claim 1, characterized in that, The area of ​​the sidewall with the largest cavity area is S1, and the area of ​​the end face of the reinforcing plate (1) is S2, where 0.9≤S2 / S1≤1.

3. The bottom protective plate according to claim 1, characterized in that, The reinforcing plate (1) has a plurality of protrusions (11) on at least one end face, and the plurality of protrusions (11) are spaced apart.

4. The bottom protective plate according to claim 3, characterized in that, The reinforcing plate (1) has a through hole (12) that penetrates the protrusion (11).

5. The bottom protective plate according to any one of claims 1-4, characterized in that, The reinforcing plate (1) has weight-reducing holes (13).

6. The bottom protective plate according to any one of claims 1-4, characterized in that, The reinforcing plate (1) is a metal plate; And / or, the buffer plate (2) is a foam-filled plate or a foam board; And / or, the reinforcing plate (1) and the buffer plate (2) are an integral structure.

7. The bottom protective plate according to any one of claims 1-4, characterized in that, The outer shell includes a first skin (3) and a second skin (4). Of the first skin (3) and the second skin (4), one is a flat plate structure and the other has a groove for accommodating the reinforcing plate (1) and the buffer plate (2). The first skin (3) and the second skin (4) are fixedly connected to cover the groove to form the accommodating cavity.

8. A battery housing, characterized in that, It includes a box body (20) and a bottom guard plate (10) as described in any one of claims 1-7, wherein the bottom guard plate (10) is located at the bottom of the box body (20) and the bottom guard plate (10) is fixedly connected to the box body (20).

9. A battery pack, characterized in that, 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. A vehicle, characterized in that, Includes the battery pack as described in claim 9.

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