A bottom guard plate sealing structure

Abstract

The utility model provides a kind of bottom guard plate sealing structure, belong to new energy battery field.The structure includes bottom guard plate, buffer heat insulation bubble cotton, lower box and first sealing ring, first installation groove is set up on bottom guard plate, buffer heat insulation bubble cotton is set in first installation groove, lower box is set on bottom guard plate, first sealing ring is set between the top surface of lower box and bottom guard plate.Adopt the bottom guard plate sealing structure provided in the utility model embodiment, can solve the problem of poor sealing in prior art.

Description

Technical Field

[0001] This utility model relates to the field of new energy batteries, and in particular to a bottom protective plate sealing structure. Background Technology

[0002] With the development of new energy batteries, the requirements for the stability and reliability of battery pack structures are becoming increasingly stringent. To meet the increasingly demanding requirements of bottom impact tests, current methods involve increasing the thickness of the bottom protective plate or the liquid cooling plate. However, as the thickness increases, the weight of the battery pack also increases, making the overall weight excessive. Therefore, adding foam between the bottom protective plate and the liquid cooling plate is also being considered to absorb the energy of bottom impacts, reduce the impact of external energy on the battery cells, and protect the internal structure of the battery pack.

[0003] In existing technologies, the addition of foam to absorb the energy of bottom impacts increases the mating distance between the lower housing and the bottom guard plate, creating a gap between them. This gap allows gas or liquid from the external environment to easily enter the battery pack, thus affecting the normal use of the battery pack.

[0004] The existing midsole protection plate structure lacks a corresponding sealing structure after the addition of foam, resulting in poor sealing performance. Utility Model Content

[0005] This utility model embodiment provides a bottom protective plate sealing structure that can solve the problem of poor sealing performance in the prior art. The technical solution is as follows:

[0006] A bottom protective plate sealing structure includes: a bottom protective plate, cushioning and heat-insulating foam, a lower housing, and a first sealing ring.

[0007] The bottom protective plate has a first mounting groove, the buffer insulation foam is placed in the first mounting groove, the lower box is placed on the bottom protective plate, and the first sealing ring is placed between the lower box and the top surface of the bottom protective plate.

[0008] Optionally, a liquid cooling plate is provided at the bottom of the lower housing, the liquid cooling plate is located on the buffer insulation foam, a second mounting groove is provided on the bottom protective plate, the first mounting groove is opened in the second mounting groove, the liquid cooling plate is disposed in the second mounting groove, a second sealing ring is provided in the second mounting groove, and the second sealing ring abuts against the groove wall of the second mounting groove.

[0009] Optionally, the cushioning and heat-insulating foam is a foam impregnated with a shear-thickening gel.

[0010] Optionally, the second mounting groove is provided with an anti-overflow groove, which abuts against the bottom of the cushioning and heat-insulating foam.

[0011] Optionally, the bottom guard plate has multiple threaded holes on its top surface, and the multiple threaded holes are evenly spaced along the edge of the bottom guard plate.

[0012] Optionally, the bottom surface of the bottom protective plate is coated with an anti-stone impact coating.

[0013] Optionally, a lid is provided on the lower housing, and a third sealing ring is provided between the lid and the lower housing.

[0014] Optionally, the lid is provided with reinforcing ribs.

[0015] The beneficial effects of the technical solution provided by this utility model embodiment include at least the following:

[0016] This utility model provides a bottom cover sealing structure. By opening a first mounting groove on the bottom cover, the cushioning and heat insulation foam can be installed and limited. By setting a first sealing ring between the lower casing and the top surface of the bottom cover, the assembly of the lower casing and the bottom cover can be sealed, preventing gas or liquid in the external environment from entering the battery pack from the assembly gap between the lower casing and the bottom cover. This effectively solves the problem of poor sealing in the prior art. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments 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 these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure provided in an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the bottom protective plate structure provided in an embodiment of the present utility model;

[0020] Figure 3 This is provided by the embodiment of the present utility model. Figure 2 Enlarged diagram of point A.

[0021] In the diagram: 1-bottom protective plate; 11-first mounting groove; 12-second mounting groove; 13-overflow groove; 14-threaded hole; 2-buffer insulation foam; 3-lower housing; 4-first sealing ring; 5-liquid cooling plate; 6-second sealing ring; 7-liquid cover; 71-reinforcing rib; 8-third sealing ring. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the overall structure provided in the embodiment of this utility model. Figure 2 This is a schematic diagram of the bottom protective plate structure provided in an embodiment of the present utility model; Figure 3 This is provided by the embodiment of the present utility model. Figure 2 An enlarged diagram of point A is shown below. Figures 1 to 3 The bottom protective plate sealing structure shown is characterized by comprising: a bottom protective plate 1, a buffer insulation foam 2, a lower housing 3, and a first sealing ring 4. A first mounting groove 11 is provided on the bottom protective plate 1, the buffer insulation foam 2 is disposed in the first mounting groove 11, the lower housing 3 is disposed on the bottom protective plate 1, and the first sealing ring 4 is disposed between the lower housing 3 and the top surface of the bottom protective plate 1.

[0024] In an exemplary embodiment of this utility model, during assembly, the buffer insulation foam 2 is first placed into the first mounting groove 11. The first mounting groove 11 provides a certain amount of sinking space for installation, thereby alleviating the assembly gap caused by the addition of the foam structure inside the battery pack. Then, the first sealing ring 4 is placed on the top edge of the bottom protective plate 1, and the lower housing 3 is installed on the bottom protective plate 1, so that the bottom edge of the lower housing 3 contacts the first sealing ring 4. The bottom protective plate 1 and the lower housing 3 are then fixed together. By setting the first sealing ring 4, the assembly gap between the lower housing 3 and the bottom protective plate 1 can be filled. After the lower housing 3 and the bottom protective plate 1 are fixed together, due to the elastic effect of the first sealing ring 4, external gas or liquid cannot enter the battery pack from between the lower housing 3 and the bottom protective plate 1, preventing external gas or liquid from interfering with the components inside the battery pack, such as causing short circuits or liquid cooling plate failure. By setting this structure, the first layer of sealing of this sealing structure is formed, improving the sealing performance of the battery pack.

[0025] The present invention provides a bottom cover sealing structure. By opening a first mounting groove 11 on the bottom cover 1, the cushioning and heat insulation foam 2 can be installed and limited. By setting a first sealing ring 4 between the lower housing 3 and the top surface of the bottom cover 1, the assembly of the lower housing 3 and the bottom cover 1 can be sealed, preventing gas or liquid in the external environment from entering the battery pack through the assembly gap between the lower housing 3 and the bottom cover 1. This effectively solves the problem of poor sealing in the prior art.

[0026] Optionally, a liquid cooling plate 5 is provided at the bottom of the lower housing 3. The liquid cooling plate 5 is located on the buffer insulation foam 2. A second mounting groove 12 is provided on the bottom protective plate 1. A first mounting groove 11 is opened in the second mounting groove 12. The liquid cooling plate 5 is located in the second mounting groove 12. A second sealing ring 6 is provided in the second mounting groove 12. The second sealing ring 6 abuts against the groove wall of the second mounting groove 12.

[0027] In an exemplary embodiment of this utility model, the lower housing 3 is a cylindrical structure with openings at the top and bottom. The liquid cooling plate 5 is first welded to the bottom of the lower housing 3, and then the lower housing 3 and the liquid cooling plate 5 are integrally installed on the bottom protective plate 1, thus facilitating the fixing and installation of the liquid cooling plate 5. A first mounting groove 11 is formed at the bottom of the second mounting groove 12. A second sealing ring 6 is disposed around the liquid cooling plate 5. The bottom of the liquid cooling plate 5 abuts against the buffer insulation foam 2 and the bottom of the second mounting groove 12. The side of the liquid cooling plate 5 abuts against the wall of the second mounting groove 12 through the second sealing ring 6, thus forming a second sealing structure. By setting the second sealing ring 6, the sealing performance between the liquid cooling plate 5 and the bottom protective plate 1 is improved, preventing gas or liquid from the external environment from entering the battery pack through the assembly gap between the liquid cooling plate 5 and the bottom protective plate 1, further improving the sealing performance of this structure.

[0028] Optionally, the cushioning and insulating foam 2 is a foam impregnated with a shear-thickening gel.

[0029] For example, in this embodiment of the invention, shear-thickening gel (STG) is a polymer material that exhibits soft plasticity when not under stress, and can be stretched into a long strip without breaking through slow stretching; however, it will suddenly break when stretched rapidly at a high strain rate, exhibiting solid properties. The cushioning and insulating foam 2 is impregnated in the shear-thickening gel (STG), and ultrasonic vibration is used to uniformly adhere it to the surface of the internal pores of the cushioning and insulating foam 2. This results in the cushioning and insulating foam 2 possessing not only high thermal resistance and high shrinkage rate, but also high impact resistance, which significantly improves with increasing impact rate, thus enhancing the impact resistance of this structure.

[0030] Optionally, an anti-overflow groove 13 is provided in the second mounting groove 12, and the anti-overflow groove 13 abuts against the bottom of the cushioning and heat-insulating foam 2.

[0031] For example, in this embodiment of the present invention, since the shear thickening gel may melt at high temperatures, an anti-overflow groove 13 is provided at the bottom of the second mounting groove 12. When the temperature inside the battery pack is too high, the shear thickening gel in the buffer insulation foam 2 will precipitate and fall into the anti-overflow groove 13, preventing the shear thickening gel from flowing to other parts of the battery structure. It is also convenient to process it later. By setting the anti-overflow groove 13, the ease of operation of this structure is improved.

[0032] Optionally, a plurality of threaded holes 14 are provided on the top surface of the bottom guard plate 1, and the plurality of threaded holes 14 are evenly spaced along the edge of the bottom guard plate 1.

[0033] By way of example, in this embodiment of the present invention, multiple threaded holes 14 are opened on the top edge of the bottom protective plate 1, and corresponding mounting holes are also opened on the lower edge of the first sealing ring 4 and the lower housing 3. Screws are used to fix the lower housing 3 and the bottom protective plate 1 through the threaded holes 14 and the mounting holes, thereby making the lower housing 3 and the bottom protective plate 1 more tightly connected together, and thus strengthening the sealing between the lower housing 3 and the bottom protective plate 1. By setting this structure, the operation is simple and the lower housing 3 and the bottom protective plate 1 can be quickly fixed or disassembled, thereby further improving the ease of operation of this structure.

[0034] Optionally, the bottom surface of the bottom guard plate 1 is coated with an anti-stone chip coating.

[0035] For example, in this embodiment of the invention, the anti-stone impact coating can effectively buffer the impact of gravel and flying sand on the bottom protective plate 1, preventing the bottom protective plate 1 from deforming or breaking. The anti-stone impact coating is a high-foaming coating that expands in volume by 150%-250% after curing, making it a lightweight coating. Furthermore, the acrylic product does not contain harmful gases such as hydrogen chloride, making it safer to recycle.

[0036] Optionally, a cover 7 is provided on the lower box 3, and a third sealing ring 8 is provided between the cover 7 and the lower box 3.

[0037] For example, in this embodiment of the present invention, the cover 7 can protect the parts and battery cells inside the lower housing 3 from the top. The top of the lower housing 3 and the cover 7 are also provided with corresponding mounting holes. After the bolt passes through the mounting hole of the cover and the third sealing ring 8, it is connected to the mounting hole of the lower housing 3, thereby making the cover 7 and the lower housing 3 stably connected. By providing the third sealing ring 8, the sealing between the cover 7 and the lower housing 3 can be guaranteed, preventing external gas and liquid from entering the battery pack from the gap between the cover 7 and the lower housing 3, thereby further improving the sealing performance of this structure.

[0038] Optionally, the cover 7 is provided with reinforcing ribs 71.

[0039] For example, in this embodiment of the present invention, the reinforcing rib 71 is a sunken groove structure, which can be formed directly by stamping during the production of the box cover 7. This method is simple to operate and can improve the structural strength of the box cover 7, thereby improving the structural stability of the sealing structure.

[0040] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0041] The above description is only an optional embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bottom protective plate sealing structure, characterized in that, include: Bottom protective plate (1), cushioning and heat insulation foam (2), lower box body (3) and first sealing ring (4). The bottom protective plate (1) is provided with a first mounting groove (11), the buffer heat insulation foam (2) is disposed in the first mounting groove (11), the lower box (3) is disposed on the bottom protective plate (1), and the first sealing ring (4) is disposed between the lower box (3) and the top surface of the bottom protective plate (1).

2. The bottom protective plate sealing structure according to claim 1, characterized in that, The bottom of the lower housing (3) is provided with a liquid cooling plate (5), which is located on the buffer insulation foam (2). The bottom protective plate (1) is provided with a second mounting groove (12), the first mounting groove (11) is opened in the second mounting groove (12), the liquid cooling plate (5) is set in the second mounting groove (12), and a second sealing ring (6) is provided in the second mounting groove (12). The second sealing ring (6) abuts against the groove wall of the second mounting groove (12).

3. The bottom protective plate sealing structure according to claim 2, characterized in that, The buffer insulation foam (2) is a foam impregnated with shear-thickening gel.

4. The bottom protective plate sealing structure according to claim 3, characterized in that, An anti-overflow groove (13) is provided in the second mounting groove (12), and the anti-overflow groove (13) abuts against the bottom of the buffer insulation foam (2).

5. The bottom protective plate sealing structure according to claim 1, characterized in that, The bottom guard plate (1) has multiple threaded holes (14) on its top surface, and the multiple threaded holes (14) are evenly spaced along the edge of the bottom guard plate (1).

6. The bottom protective plate sealing structure according to claim 1, characterized in that, The bottom surface of the bottom protective plate (1) is coated with anti-stone impact paint.

7. The bottom protective plate sealing structure according to claim 1, characterized in that, A cover (7) is provided on the lower box (3), and a third sealing ring (8) is provided between the cover (7) and the lower box (3).

8. The bottom protective plate sealing structure according to claim 7, characterized in that, The box cover (7) is provided with reinforcing ribs (71).

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