Battery pack bottom protection plate structure, battery pack and vehicle

Abstract

The utility model discloses a battery pack bottom guard plate structure, a battery pack and a vehicle, the battery pack bottom guard plate structure comprises a first plate body, a second plate body and a plurality of arc-shaped ribs connected between the first plate body and the second plate body, the first plate body is located above the second plate body, and the arc-shaped ribs are connected between the first plate body and the second plate body. The projection position of the connection position of the arc-shaped rib and the first plate body on the second plate body and the connection position of the arc-shaped rib and the second plate body are arranged at an interval, and the included angle A between the tangent line of the connection position of the arc-shaped rib and the second plate body and the acute angle of the second plate body is larger than or equal to 30 degrees and smaller than or equal to 60 degrees. According to the battery pack bottom protection plate structure, the overall thickness of the battery pack is reduced and the overall weight of the battery pack is reduced while the bottom protection requirement of the battery pack is met.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicles, and in particular to a battery pack bottom guard plate structure, a battery pack and a vehicle. Background Art

[0002] In the prior art, battery packs have a bottom guard plate to protect the bottom of the battery pack from damage caused by bumps and collisions. Existing battery pack bottom guard plates include metal profile plates. These existing metal profile bottom guard plate designs either occupy a large amount of protective space, reducing the volume packing efficiency of the battery pack, or increase the weight of the protective structure, reducing the mass packing efficiency of the battery pack. Utility Model Content

[0003] The purpose of the present invention is to provide a battery pack bottom guard plate structure, which can at least to a certain extent solve the above-mentioned technical problems in the prior art and improve the reliability of the battery pack.

[0004] According to an embodiment of the present invention, the battery pack bottom guard plate structure includes a first plate body, a second plate body and a plurality of arc-shaped ribs connected between the first plate body and the second plate body. The first plate body is located above the second plate body. The projection position of the position where the arc-shaped rib is connected to the first plate body on the second plate body is spaced from the position where the arc-shaped rib is connected to the second plate body. The angle between the tangent line at the connection between the arc-shaped rib and the second plate body and the acute angle of the second plate body is A, wherein 30°≦A≦60°.

[0005] According to an embodiment of the present invention, the thickness of one end of the arc-shaped rib connected to the first plate body gradually increases toward the first plate body.

[0006] According to an embodiment of the present invention, the thickness of one end of the arc-shaped rib connected to the second plate body gradually increases toward the second plate body.

[0007] According to an embodiment of the present invention, the thickness of the second plate body is greater than the thickness of the first plate body.

[0008] According to an embodiment of the present invention, the opening of the arc-shaped rib faces the second plate body.

[0009] According to an embodiment of the present invention, the thickness of the first plate body is 1mm-2mm, the thickness of the second plate body is 1.5mm-3mm, and the thickness of the bottom guard plate structure is 5mm-10mm.

[0010] According to an embodiment of the present invention, the distance between two adjacent arc-shaped ribs is 35mm-50mm.

[0011] According to an embodiment of the present invention, the first plate body, the second plate body and the plurality of arc-shaped ribs are integrally formed.

[0012] The utility model also provides a battery pack having the above-mentioned battery pack bottom guard plate structure.

[0013] The utility model also provides a vehicle with the battery pack.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] The battery pack bottom guard plate structure provided by the embodiment of the present invention optimizes the force-bearing characteristics and energy absorption characteristics of the bottom guard plate structure of the battery pack under mechanical collision and extrusion conditions without occupying battery pack space or increasing battery pack weight, through the angle of the connection position between the arc-shaped ribs and the first plate body and the second plate body, the arrangement density design of the arc-shaped ribs, and the reinforcement structure design of the connection position between the arc-shaped ribs and the first plate body and the second plate body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a partial cross-sectional schematic diagram of a battery pack bottom guard plate structure provided by one embodiment of the present invention;

[0017] Figure 2 This is a partial cross-sectional schematic diagram of a battery pack bottom guard plate structure provided by one embodiment of the present invention;

[0018] Figure 3 It is a partial cross-sectional schematic diagram of the battery pack bottom guard plate structure provided by one embodiment of the present invention.

[0019] Description of the accompanying drawings:

[0020] 100. Bottom guard plate structure; 1. First plate body; 2. Second plate body; 3. Arc ribs. DETAILED DESCRIPTION

[0021] The following description sets forth many specific details to facilitate a thorough understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the scope of the present invention. Therefore, the present invention is not limited to the specific implementations disclosed below.

[0022] In this specification, directional terms such as "up," "down," "left," "right," "front," "back," "front," "back," "top," and "bottom" are defined relative to the configurations shown in the accompanying drawings. These terms are relative and may vary depending on the device's location or usage. Therefore, these and other directional terms should not be construed as restrictive. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0024] In one embodiment of the present invention, a battery pack bottom guard plate structure is disclosed, which is used to protect the bottom of the battery pack to prevent the bottom of the battery pack from being damaged due to collisions, thereby preventing the battery cells or battery cell components inside the battery pack from being damaged.

[0025] See also Figure 1-3 As shown, the present invention provides an embodiment in which the battery pack bottom guard plate structure 100 includes a first plate body 1, a second plate body 2, and a plurality of arc-shaped ribs 3 connected between the first plate body 1 and the second plate body 2. The first plate body 1 is located above the second plate body 2, and the first plate body 1 is parallel to the second plate body 2. There is an appropriate distance between the first plate body 1 and the second plate body 2. The plurality of arc-shaped ribs 3 are spaced between the first plate body 1 and the second plate body 2, so that a deformation space is formed between the first plate body 1 and the second plate body 2. At the same time, the weight of the bottom guard plate 100 is reduced. When the bottom guard plate structure 100 of this embodiment is applied to the battery, the first plate body 1 is close to the battery cells in the battery pack, and the second plate body 2 is close to the ground. When the second plate body 2 is bumped, the second plate body 2 deforms toward the side of the first plate body 1 to absorb the impact energy.

[0026] The first end of the arcuate rib 3 is connected to the first plate 1, and the second end of the arcuate rib 3 is connected to the second plate 2. The arcuate rib 3 is arranged as a whole at an angle. Specifically, the point where the arcuate rib 3 connects to the first plate 1 is spaced apart from the point where the arcuate rib 3 connects to the second plate 2. The overall tilted arrangement of the arcuate rib 3 allows the bottom guard plate 100 to better bend and deform when it is bumped, thereby absorbing impact energy and preventing the impact energy from being further transferred to the first plate 1 or further to the battery cells within the battery pack.

[0027] Furthermore, in this embodiment, the tangent line at the connection between the arc-shaped rib 3 and the second plate 2 forms an acute angle A with the second plate 2, wherein 30°≦A≦60°. This angle setting provides the arc-shaped rib 3 with sufficient support strength and suitable deformation strength, preventing deformation in the event of a slight bump. In the event of a more serious bump, insufficient deformation causes the impact energy to be transferred to the interior of the battery pack, causing damage to the battery cell. According to one embodiment of the present utility model, the thickness of the end of the arc-shaped rib 3 connected to the first plate 1 gradually increases in the direction closer to the first plate 1, thereby strengthening the strength of the connection between the arc-shaped rib 3 and the first plate 1 and preventing the deformation position of the arc-shaped rib 3 from being close to the first plate 1, thereby preventing the first plate 1 from being further impacted.

[0028] According to an embodiment of the present invention, the thickness of one end of the arc rib 3 connected to the second plate body 2 gradually increases toward the second plate body 2 to ensure the supporting strength of the arc rib 3 for the second plate body 2.

[0029] According to one embodiment of the present invention, the first plate 1 and the second plate 2 have different thicknesses, with the second plate 2 being thicker than the first plate 1. The thicker first plate 1 provides improved protection against minor impacts, such as those from branches, pebbles, and stagnant water. For more severe impacts, such as those from curbstones or ground piles, the first plate 1 deforms toward the second plate 2, absorbing the impact energy and providing protection.

[0030] According to one embodiment of the present invention, the opening of the arc-shaped rib 3 faces the second plate body 2, that is, the recess of the arc-shaped rib 3 faces the second plate body 2. This arrangement allows the arc-shaped rib 3 to deform with the recess more open, thereby absorbing more impact energy.

[0031] According to one embodiment of the present invention, the thickness of the first plate 1 is 1mm-2mm, the thickness of the second plate 2 is 1.5mm-3mm, and the overall thickness of the bottom guard plate 100 structure is 5mm-10mm. While providing sufficient protection, the bottom guard plate structure 100 minimizes the impact on the overall thickness and weight of the battery pack. Preferably, the thickness of the first plate 1 is 1.2mm, the thickness of the second plate 2 is 1.6mm, and the thickness of the bottom guard plate 100 is 7.5mm.

[0032] According to one embodiment of the present invention, the distance between two adjacent arc-shaped ribs 3 is 35mm-50mm. The reasonable spacing distance setting of the arc-shaped ribs 3 increases the support strength between the first plate body 1 and the second plate body 2, while reducing the weight of the bottom guard plate structure 100.

[0033] According to one embodiment of the present invention, the first plate 1, the second plate 2, and the plurality of arc-shaped ribs 3 are integrally formed. Preferably, the first plate 1, the second plate 2, and the plurality of arc-shaped ribs 3 are integrally formed aluminum profiles. The present invention also provides a battery pack, comprising a bottom guard plate structure 100 according to any of the above embodiments, the bottom guard plate structure 100 being disposed at the bottom of the battery pack, wherein the first plate 1 is disposed relative to the second plate 2, closer to the battery cells within the battery pack, i.e., after the battery pack is installed on a vehicle, the second plate 2 is closer to the ground.

[0034] The present invention also provides a vehicle, comprising the battery pack of the aforementioned embodiment, wherein the battery pack is detachably fixed to the bottom side of the vehicle body, and the vehicle can automatically replace the battery pack of the same type at a battery swap station.

[0035] The battery pack bottom guard plate structure provided by the present invention can at least achieve the following beneficial effects: it optimizes the stress characteristics and energy absorption characteristics of the bottom guard plate structure of the battery pack under mechanical collision and extrusion conditions, meets the bottom protection requirements of the battery pack, reduces the overall thickness of the battery pack, and reduces the overall weight of the battery pack.

[0036] It should be noted that although the present invention is disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined by the claims of the present invention.

Claims

1. A battery pack bottom guard plate structure, characterized in that: The invention comprises a first plate, a second plate and a plurality of arcuate ribs connected between the first plate and the second plate, wherein the first plate is located above the second plate, and the projection position of the position where the arcuate rib is connected to the first plate on the second plate is spaced from the position where the arcuate rib is connected to the second plate, and the angle between the tangent line at the connection between the arcuate rib and the second plate and the acute angle of the second plate is A, wherein 30°≦A≦60°.

2. The battery pack bottom guard plate structure according to claim 1, characterized in that: The thickness of one end of the arc-shaped rib connected to the first plate body gradually increases toward the first plate body.

3. The battery pack bottom guard plate structure according to claim 2, characterized in that: The thickness of one end of the arc-shaped rib connected to the second plate body gradually increases toward the second plate body.

4. The battery pack bottom guard plate structure according to claim 1, characterized in that: The thickness of the second plate is greater than that of the first plate.

5. The battery pack bottom guard plate structure according to claim 1, characterized in that: The opening of the arc-shaped rib faces the second plate body.

6. The battery pack bottom guard plate structure according to claim 1, characterized in that: The thickness of the first plate body is 1mm-2mm, the thickness of the second plate body is 1.5mm-3mm, and the thickness of the bottom guard plate structure is 5mm-10mm.

7. The battery pack bottom guard plate structure according to claim 1, characterized in that: The distance between two adjacent arc-shaped ribs is 35mm-50mm.

8. The battery pack bottom guard plate structure according to claim 1, characterized in that: The first plate body, the second plate body and the plurality of arc-shaped ribs are integrally formed.

9. A battery pack, characterized in that: The battery pack has the bottom guard plate structure according to any one of claims 1-8.

10. A vehicle, characterized in that: The vehicle has a battery pack according to claim 9 or a battery pack bottom guard plate structure according to any one of claims 1-8.

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