Drainage structure, double-layer bottom protection plate and battery pack

Abstract

The utility model provides a drainage structure, a double-layer bottom guard plate and a battery pack, the drainage structure comprises: a mounting base body, which is provided with a first through hole penetrating through the upper and lower sides of the mounting base body; the inserting part is inserted into the first through hole and is provided with a second through hole which is communicated with the upper side and the lower side of the mounting base body; the shielding part is connected with the inserting part, and a drainage channel communicated with the second through hole is formed between the shielding part and the inserting part; the projection of the second through hole to the shielding part is completely located on the shielding part; water on the upper side of the installation base body can flow to the lower side of the installation base body through the drainage channel and the second through hole due to the gravity of the water. The drainage structure has the functions of draining water and preventing foreign matters from passing through, and can improve the drainage capacity of the double-layer bottom guard plate when being applied to the double-layer bottom guard plate.

Description

Technical Field

[0001] The utility model relates to the technical field of drainage structures, and in particular to a drainage structure. The utility model also relates to a double-layer bottom guard plate provided with the drainage structure, and a battery pack provided with the double-layer bottom guard plate. Background Art

[0002] The bottom of the battery pack is usually sealed with a bottom guard plate. The common connection method between the bottom guard plate and the lower shell of the battery pack is bolt connection, which has the characteristics of firm connection and convenient and quick assembly. In order to be applied in different scenarios to meet different needs, one structural form of the bottom guard plate is to use extruded profiles to splice into a double-layer bottom guard plate structure, and weld it by friction stir welding to form a cavity inside. This structural form has good dispersion and absorption capabilities when subjected to external force impact, and has a good protection effect on the battery cells inside the battery pack. When the double-layer bottom guard plate is bolted to the lower shell, the bolts enter from the through holes on the lower plate of the double-layer bottom guard plate and are fastened to the upper plate, pressing the upper plate against the lower shell.

[0003] Double-layer underbody panels have cavity openings at both ends of the extruded profile. To prevent dust, these openings are usually spot-welded with plugging plates. However, this method of spot-welding plugging plates cannot completely seal the cavity inside the double-layer underbody panel, allowing external water to enter the cavity. Furthermore, the through-holes on the lower plate of the double-layer underbody panel are usually sealed with plugging materials to prevent external foreign matter from entering the cavity. This makes it difficult for water in the cavity to drain out, resulting in poor drainage capacity. Utility Model Content

[0004] In view of this, the present invention aims to provide a drainage structure to improve the drainage capacity of the double-layer bottom guard plate.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0006] A drainage structure comprising:

[0007] The mounting base is provided with a first through hole running through the upper and lower sides thereof;

[0008] An inserting portion, inserted into the first through hole, and provided with a second through hole communicating with the upper and lower sides of the mounting base;

[0009] a shielding portion connected to the inserting portion, and forming a drainage channel communicating with the second through hole between the shielding portion and the inserting portion; a projection of the second through hole onto the shielding portion is completely located on the shielding portion;

[0010] Water on the upper side of the installation base can flow to the lower side of the installation base through the drainage channel and the second through hole due to its own gravity.

[0011] Furthermore, the inserting portion is made of an elastic material and is provided with a recessed portion along its circumference, and the recessed portion is tightened in the first through hole.

[0012] Furthermore, the upper part of the insertion part is provided with a limiting body extending radially outward along the first through hole, and the limiting body abuts the upper side wall of the mounting base; the lower part of the insertion part is provided with an outer peripheral wall whose diameter gradually increases along the drainage direction of the second through hole, which together with the limiting body forms a recessed part.

[0013] Furthermore, a notch is provided at the top of the inserting portion, and a lower edge of the notch is located in the first through hole.

[0014] Furthermore, the cone angle of the lower peripheral wall of the insertion portion is 10° to 15°.

[0015] Furthermore, the shielding portion includes a shielding plate and at least one connecting plate, the second through hole is axially opposite to the shielding plate, and the connecting plate is connected between the shielding plate and the insertion portion.

[0016] Furthermore, the insertion portion is in the shape of a cup with an open top, and the inner bottom wall is provided with a guiding slope whose height gradually decreases toward the second through hole.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] The drainage structure described in the present invention can discharge water on the upper side of the mounting base downward by arranging an inserting portion on the mounting base and arranging a second through hole on the inserting portion; foreign matter on the lower side of the mounting base will collide with the shielding portion after passing through the first through hole, and fall back to the lower side of the mounting base from the first through hole again, and at the same time, a drainage channel is arranged between the inserting portion and the shielding portion, which does not affect the flow of water on the upper side of the mounting base to the lower side of the mounting base; the inserting portion and the shielding portion work together to achieve the functions of drainage and preventing foreign matter from passing through, and can be applied to a double-layer bottom guard plate to improve the drainage capacity of the double-layer bottom guard plate.

[0019] By setting the insertion part to be elastic and providing a recessed part in the circumferential direction, the insertion part can be inserted into the first through hole by squeezing the outer wall of the insertion part. The insertion part then expands outwards by its own elastic force and tightens in the first through hole, firmly fixing the insertion part. This is not only convenient and quick to install, but also reliable in connection.

[0020] When the insertion part is installed in the first through hole, the limiting body can abut against the upper side wall of the installation base, and the limiting body can prevent the insertion part from falling downward from the first through hole; the lower part of the insertion part is set to a structure with a gradually increasing diameter, which can prevent the insertion part from moving upward from the first through hole. The limiting body and the lower part of the insertion part jointly form a recessed part that cooperates with the first through hole.

[0021] A notch is set at the top of the insertion part, and the lower edge of the notch is confined in the first through hole, so that water on the upper side of the installation base can flow to the insertion part through the notch. At the same time, the top of the insertion part is more easily deformed by radial extrusion, which facilitates installation into the first through hole.

[0022] Setting the taper angle of the lower peripheral wall of the inserting portion to 10° to 15° can make the inserting portion less likely to fall off and at the same time reduce the resistance to installation into the first through hole.

[0023] The insertion part is set in a cup shape, which can allow water on the upper side of the installation base to flow into the insertion part. A guiding slope is set on the inner bottom wall of the insertion part, which can allow water to actively flow into the guiding slope under the action of gravity, which is conducive to the emptying of the insertion part.

[0024] Another object of the present invention is to provide a double-layer bottom guard plate, which is provided with the drainage structure as described above.

[0025] Furthermore, the double-layer bottom guard plate includes an upper plate and a lower plate, the upper plate is provided with a bolt hole; the lower plate is the mounting base, and is provided with a first through hole directly opposite to the bolt hole.

[0026] The double-layer bottom guard plate of the utility model is provided with a first through hole on the lower plate, so that bolts can enter the double-layer bottom guard plate and pass upward through the bolt hole to connect to the lower shell body. The drainage structure is provided to discharge water entering the cavity of the double-layer bottom guard plate, and at the same time prevent external foreign matter from entering the cavity of the double-layer bottom guard plate from the first through hole, thereby enhancing the drainage capacity of the double-layer bottom guard plate.

[0027] Another object of the present invention is to provide a battery pack, wherein the battery pack is provided with the double-layer bottom guard plate as described above.

[0028] The battery pack described in the present invention has the same beneficial effects as the double-layer bottom guard plate described above relative to the prior art, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0030] Figure 1 This is a schematic diagram of the drainage structure according to Example 1 of the present utility model;

[0031] Figure 2 This is a top view of the inserting portion and the shielding portion according to the first embodiment of the present invention;

[0032] Figure 3 for Figure 2 Cross-sectional view in the AA direction;

[0033] Figure 4 for Figure 2 Cross-sectional view in the middle BB direction;

[0034] Figure 5 This is a schematic structural diagram of the double-layer bottom guard plate according to the second embodiment of the present invention;

[0035] Figure 6 This is a partial cross-sectional view of the double-layer bottom guard plate described in Example 2 of the present utility model.

[0036] Description of reference numerals:

[0037] 1. Install the substrate;

[0038] 101, first through hole;

[0039] 2. Insertion department;

[0040] 201, second through hole; 202, recessed portion; 203, position limiting body; 204, notch; 205, guiding slope;

[0041] 3. Shielding part;

[0042] 301, shielding plate; 302, connecting plate;

[0043] 4. Upper plate;

[0044] 401, bolt hole;

[0045] 5. Lower plate;

[0046] 6. Sealing piece;

[0047] 7. Drainage channel. DETAILED DESCRIPTION

[0048] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0049] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," and "outer" appear to indicate orientation or positional relationships, these are based on the orientation or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, if terms such as "first" and "second" appear, they are used solely for descriptive purposes and should not be construed as indicating or implying relative importance.

[0050] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "mounted," "connected," "connection," and "connector" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0051] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0052] Example 1

[0053] This embodiment relates to a drainage structure to improve the drainage capacity of a double-layer bottom guard plate.

[0054] In terms of overall structure, the drainage structure in this embodiment includes a mounting base, an inserting portion, and a shielding portion. The mounting base is provided with a first through-hole that runs through the upper and lower sides of the mounting base. The inserting portion is inserted into the first through-hole and is provided with a second through-hole that connects the upper and lower sides of the mounting base. The shielding portion is connected to the inserting portion, and a drainage channel that connects to the second through-hole is formed between the shielding portion and the inserting portion. The projection of the second through-hole onto the shielding portion is completely located on the shielding portion. Water on the upper side of the mounting base can flow to the lower side of the mounting base through the drainage channel and the second through-hole due to its own gravity.

[0055] As configured above, the drainage structure of this embodiment, by providing a plug-in portion on the mounting base and a second through-hole on the plug-in portion, can drain water from the upper side of the mounting base downward. Foreign matter on the lower side of the mounting base will collide with the shielding portion after passing through the first through-hole and fall back through the first through-hole to the lower side of the mounting base. A drainage channel is provided between the shielding portion and the plug-in portion, which does not affect the flow of water from the upper side of the mounting base to the lower side of the mounting base. The plug-in portion and the shielding portion work together to drain water and prevent foreign matter from passing through. Application to a double-layer bottom guard plate can improve the drainage capacity of the double-layer bottom guard plate.

[0056] Based on the above overall introduction, refer to Figures 1 to 4 Specifically, this embodiment illustrates a plate-shaped mounting base 1. Of course, the mounting base 1 may also have other shapes. The insertion portion 2 is inserted into the first through-hole 101, blocking the first through-hole 101. This allows the second through-hole 201 to become the sole connection between the two sides of the mounting base 1. The projection of the second through-hole 201 onto the shielding portion 3 is completely located above the shielding portion 3, preventing most foreign matter that flies into the second through-hole 201 from colliding with the shielding portion 3 and returning to the underside of the mounting base 1 through the second through-hole 201.

[0057] Among them, regarding the specific structure of the insertion part 2, the insertion part 2 of this embodiment is made of an elastic material and is provided with a recessed portion 202 along its own circumference, and the recessed portion 202 is tightened in the first through hole 101. By setting the insertion part 2 to be elastic and providing the recessed portion 202 in the circumferential direction, the insertion part 2 can be installed in the first through hole 101 by squeezing the outer wall of the insertion part 2. The insertion part 2 then expands outwards by its own elastic force and is tightened in the first through hole 101, firmly fixing the insertion part 2, which is not only convenient and quick to install, but also reliable in connection. In order to facilitate processing and molding, the insertion part 2 and the shielding part 3 of this embodiment are integrally molded. As for the specific material of the insertion part 2, it can be rubber or elastic plastic material. The insertion part 2 and the shielding part 3 of this embodiment are made of rubber material in one piece, which has the advantages of simple manufacturing process, high installation efficiency, excellent durability and anti-aging properties, and subsequent maintenance is simple and convenient, replacement is simple, and the cost is also low.

[0058] Secondly, the insertion portion 2 is cup-shaped with an open top. Its inner bottom wall is provided with a guide slope 205 that gradually decreases in height toward the second through hole 201. The cup-shaped insertion portion 2 allows water on the upper side of the mounting base 1 to flow into the insertion portion 2. The guide slope 205 on the inner bottom wall of the insertion portion 2 allows water to actively flow into the guide slope 205 under the action of gravity, facilitating the emptying of the insertion portion 2. In this embodiment, the inner bottom wall of the insertion portion 2 is shaped like a conical funnel.

[0059] Preferably, the upper portion of the inserting portion 2 is provided with a limiting body 203 extending radially outward along the first through hole 101, and the limiting body 203 abuts against the upper side wall of the mounting base 1. The lower portion of the inserting portion 2 is provided with an outer peripheral wall whose diameter gradually increases along the drainage direction of the second through hole 201, and together with the limiting body 203, forms a recessed portion 202. When the inserting portion 2 is installed in the first through hole 101, the limiting body 203 can abut against the upper side wall of the mounting base 1, and the limiting body 203 can prevent the inserting portion 2 from falling downward from the first through hole 101; the lower portion of the inserting portion 2 is provided with a structure with a gradually increasing diameter, which can prevent the inserting portion 2 from moving upward from the first through hole 101, and the limiting body 203 and the lower portion of the inserting portion 2 together form a recessed portion 202 that cooperates with the first through hole 101.

[0060] It should be noted that the structure of the insertion portion 2 can also be configured such that the upper portion is configured with a gradually increasing diameter upward, and the lower portion is provided with a stopper 203. Alternatively, the upper and lower portions of the insertion portion 2 can be provided with stoppers 203, with the stoppers 203 on both sides of the mounting base 1 abutting the mounting base 1 from above and below. Alternatively, the insertion portion 2 can be configured in an hourglass shape, i.e., both the upper and lower portions of the insertion portion 2 have tapered surfaces, with the recess 202 formed between the two tapered surfaces. These configurations can all achieve the purpose of embedding the insertion portion 2 on the mounting base 1.

[0061] Specifically, the taper angle of the lower peripheral wall of the insertion portion 2 is 10° to 15°. Setting the taper angle of the lower peripheral wall of the insertion portion 2 to 10° to 15° can make the insertion portion 2 less likely to fall off while reducing the resistance to installation into the first through hole 101. When the taper angle of the lower peripheral wall of the insertion portion 2 is less than 10°, the connection with the first through hole 101 is not strong enough. When the taper angle of the lower peripheral wall of the insertion portion 2 is greater than 15°, the installation resistance of the insertion portion 2 is large and more laborious.

[0062] Furthermore, to facilitate installation of the insertion portion 2, a notch 204 is provided at the top of the insertion portion 2, with the lower edge of the notch 204 located within the first through-hole 101. Providing the notch 204 at the top of the insertion portion 2 and confining the lower edge of the notch 204 within the first through-hole 101 allows water on the upper side of the mounting base 1 to flow through the notch 204 to the insertion portion 2, preventing water from leaking directly below the mounting base 1 at the notch 204. This also makes the top of the insertion portion 2 more easily deformed by radial compression, facilitating installation into the first through-hole 101. Specifically, in this embodiment, four notches 204 are evenly distributed along the circumference of the insertion portion 2, each of which is rectangular in shape, enabling the upper portion of the insertion portion 2 to be more easily squeezed through the first through-hole 101 during installation.

[0063] Furthermore, the shielding portion 3 includes a shielding plate 301 and at least one connecting plate 302. The second through-hole 201 is axially aligned with the shielding plate 301, and the connecting plate 302 is connected between the shielding plate 301 and the insertion portion 2. In this embodiment, the shielding plate 301 is a circular plate, coaxially arranged with the second through-hole 201 and spaced a certain distance from the top of the second through-hole 201, forming a drainage channel 7. Four connecting plates 302 are provided, evenly spaced along the circumference of the shielding plate 301, forming a "cross" shape around the shielding portion 3. Water on the upper side of the mounting base 1 can enter the drainage channel 7 between adjacent connecting plates 302.

[0064] The drainage structure of this embodiment can drain water and prevent foreign objects from passing through. When used on a double-layer bottom guard plate, it can improve the drainage capacity of the double-layer bottom guard plate. It can also be used in other scenarios that require one-way drainage and prevention of foreign objects.

[0065] Example 2

[0066] This embodiment relates to a double-layer bottom guard plate, referring to Figure 5 and Figure 6 As shown, the double-layer bottom guard plate is provided with the drainage structure of Example 1. The double-layer bottom guard plate includes an upper plate 4 and a lower plate 5. The upper plate 4 is provided with a bolt hole 401. The lower plate 5 is a mounting base 1 and is provided with a first through hole 101 directly opposite to the bolt hole 401.

[0067] Specifically, the upper plate 4 and the lower plate 5 are both extruded profiles, which are fixedly connected by stir friction welding after splicing. Sealing plates 6 are spot-welded at the cavity openings at both ends of the double-layer bottom guard plate. Bolt holes 401 are arranged at intervals along the edge of the double-layer bottom guard plate, and each bolt hole 401 is provided with a corresponding drainage structure of Example 1. By providing a first through hole 101 on the lower plate 5, bolts can enter the double-layer bottom guard plate and pass upward through the bolt hole 401 to connect to the lower shell of the battery pack. The drainage structure of Example 1 can drain water that enters the cavity of the double-layer bottom guard plate, while preventing external foreign matter from entering the cavity of the double-layer bottom guard plate from the first through hole 101, thereby enhancing the drainage capacity of the double-layer bottom guard plate.

[0068] Example 3

[0069] The present embodiment relates to a battery pack, which is provided with a double-layer bottom guard plate of the second embodiment. By providing the double-layer bottom guard plate of the second embodiment, the bottom of the battery pack can have a strong impact resistance, and the water in the cavity of the double-layer bottom guard plate can be discharged in time. For example, when the battery pack of this embodiment is applied to a vehicle, when the vehicle is driving in rainy weather or wading through water, water will enter the cavity of the double-layer bottom guard plate from the gap at the edge of the sealing piece on the double-layer bottom guard plate. As the vehicle vibrates while driving, the water will flow in the cavity of the double-layer bottom guard plate, and the water can be quickly discharged outward using the drainage structure. Even if the vehicle is wading through deep water and the water seeps back into the cavity of the double-layer bottom guard plate from the drainage structure, the drainage structure can also quickly drain the water in the cavity when the vehicle leaves the wading environment.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A drainage structure, characterized in that: include: The mounting base is provided with a first through hole running through the upper and lower sides thereof; An inserting portion, inserted into the first through hole, and provided with a second through hole communicating with the upper and lower sides of the mounting base; a shielding portion connected to the inserting portion, and forming a drainage channel communicating with the second through hole between the shielding portion and the inserting portion; a projection of the second through hole onto the shielding portion is completely located on the shielding portion; Water on the upper side of the installation base can flow to the lower side of the installation base through the drainage channel and the second through hole due to its own gravity.

2. The drainage structure according to claim 1, characterized in that: The inserting portion is made of elastic material and is provided with a recessed portion along its circumference. The recessed portion is tightened in the first through hole.

3. The drainage structure according to claim 2, characterized in that: The top of the insertion part extends radially outward along the first through hole to form a limiting body, and the limiting body abuts the upper side wall of the mounting base; the lower part of the insertion part is provided with an outer peripheral wall with a diameter gradually increasing along the drainage direction of the second through hole, which together with the limiting body forms a recessed part.

4. The drainage structure according to claim 3, characterized in that: A notch is provided at the top of the inserting portion, and a lower edge of the notch is located in the first through hole.

5. The drainage structure according to claim 3, characterized in that: The taper angle of the lower peripheral wall of the inserting portion is 10° to 15°.

6. The drainage structure according to claim 1, characterized in that: The shielding portion includes a shielding plate and at least one connecting plate. The second through hole is axially opposite to the shielding plate. The connecting plate is connected between the shielding plate and the insertion portion.

7. The drainage structure according to any one of claims 1 to 6, characterized in that: The inserting portion is in the shape of a cup with an open top, and an inner bottom wall is provided with a guiding inclined surface whose height gradually decreases toward the second through hole.

8. A double-layer bottom guard plate, characterized by: The double-layer bottom guard plate is provided with a drainage structure as claimed in any one of claims 1 to 7.

9. The double-layer bottom guard plate according to claim 8, characterized in that: The double-layer bottom guard plate includes an upper plate and a lower plate, wherein the upper plate is provided with a bolt hole; the lower plate is the mounting base and is provided with a first through hole directly opposite to the bolt hole.

10. A battery pack, characterized in that: The battery pack is provided with a double-layer bottom guard plate as described in claim 8 or 9.

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