A sealing cover for a battery pack, a battery pack, and a tram

Abstract

This utility model proposes a sealing cover for a battery pack, a battery pack, and an electric vehicle, belonging to the field of battery technology. It includes a cover body comprising a cover plate and a flange portion. The flange portion is located at the edge of the lower surface of the cover plate. The flange portion includes a vertical plate and a first flange edge and a second flange edge connected sequentially. The vertical plate is connected to the edge of the cover plate, the cover plate is parallel to the first flange edge, the vertical plate is parallel to the second flange edge, and the cover plate is perpendicular to the vertical plate; or the flange portion includes a second flange edge connected to the edge of the cover plate. The cover body of this utility model includes a cover plate and a flange portion. The flange portion is located at the edge of the lower surface of the cover plate. Through the design of the flange portion, the fit between the flange portion and the box body and sealing foam is improved, thus enhancing the sealing effect of the cover.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, and specifically relates to a sealing cover for a battery pack, a battery pack, and a tram. Background Technology

[0002] To ensure battery safety and stability, high requirements are placed on the battery pack casing. While existing battery pack casings meet the strength and shape requirements, the connection between the casing cover and the casing itself needs to meet stringent connection standards to guarantee safe, stable, and efficient battery operation. Furthermore, to meet waterproof and fireproof requirements, and to ensure safe, stable, and efficient battery operation, the sealing requirements of the battery pack casing are becoming increasingly stringent. Good sealing can: ① prevent the external environment from affecting the battery cells; ② maintain internal pressure balance within the battery; ③ meet the protection rating requirements of electrical equipment enclosures; ④ ensure waterproof sealing, etc. The bottom seal of a battery pack typically involves multiple sealing surfaces such as a liquid cooling plate and a bottom protective plate. However, the top seal often relies on a single flange face seal on the casing cover. Therefore, a single-seal casing cover cannot meet the high sealing requirements. Utility Model Content

[0003] To address the aforementioned problems, this utility model proposes a sealing cover for a battery pack, comprising a cover body, wherein the cover body includes a cover plate and a flange portion, and the flange portion is disposed at the edge of the lower surface of the cover plate.

[0004] Furthermore, the flange portion includes a vertical plate and a first flange edge and a second flange edge connected in sequence. The vertical plate is connected to the edge of the cover plate. The cover plate is parallel to the first flange edge, the vertical plate is parallel to the second flange edge, and the cover plate is perpendicular to the vertical plate.

[0005] Alternatively, the flange portion may include a second flange edge, which is connected to the edge of the cover plate.

[0006] Furthermore, the cover plate, the vertical plate, the first flange edge, and the second flange edge are integrally formed;

[0007] Alternatively, the cover plate and the second flange edge may be integrally formed.

[0008] A battery pack includes sealing foam, a housing, and a cover, wherein the cover is mounted on the upper surface of the housing, the sealing foam is located between the cover and the housing, and both sides of the sealing foam abut against the cover and the housing respectively; the sealing foam and the housing are mounted in a groove formed by a first flange edge and a second flange edge.

[0009] Alternatively, the sealing foam and the housing may be installed in the groove formed by the cover plate and the second flange.

[0010] Furthermore, the sealing foam includes a first sealing edge and a second sealing edge, the lower surface of the first sealing edge is provided with the second sealing edge, the upper surface of the first sealing edge is in contact with the lower surface of the first flange edge, and the outer surface of the second sealing edge is in contact with the inner surface of the second flange edge.

[0011] Alternatively, the upper surface of the first sealing edge may contact the lower surface of the cover plate; the outer surface of the second sealing edge may contact the inner surface of the second flange edge.

[0012] The lower surface of the first sealing edge and the inner surface of the second sealing edge are both in contact with the housing.

[0013] Furthermore, the upper and lower surfaces of the first sealing edge are coated with double-sided adhesive or glue; the inner and outer surfaces of the second sealing edge are coated with double-sided adhesive or glue.

[0014] Furthermore, the enclosure includes a first enclosure surface and a second enclosure surface, the first enclosure surface is in contact with the lower surface of the first sealing edge, and the second enclosure surface is in contact with the inner surface of the second sealing edge.

[0015] Furthermore, the battery pack also includes a fixing mechanism, which is used to fix the battery pack through the second flange edge, the second sealing edge, and the second housing surface.

[0016] And / or a fixing mechanism is used to fix the device through the first flange edge, the first sealing edge, and the first housing surface.

[0017] Furthermore, the fixing mechanism includes a bolt and a nut, wherein the bolt passes through the second flange edge, the second sealing edge, and the second housing surface and is connected to the nut;

[0018] And / or bolts are used to secure the device to the first flange edge, the first sealing edge, and the first housing surface with nuts.

[0019] Furthermore, it includes the vehicle body and the aforementioned battery pack, the battery pack being disposed within the vehicle body.

[0020] Beneficial effects:

[0021] 1. The cover of this utility model includes a cover plate and a flange. The flange is provided at the edge of the lower surface of the cover plate. The flange is designed to fit the cover with the box body and the sealing foam, thereby improving the sealing effect of the cover.

[0022] 2. The cover of this utility model is installed on the box body, and the sealing foam is located between the cover and the box body, with both sides of the sealing foam abutting against the cover and the box body respectively; that is, the cover and the sealing foam are tightly fitted and pressed together, and the sealing foam and the box body are tightly fitted and pressed together; to prevent the influence of the external environment on the battery cell; to maintain the internal pressure balance of the battery; to meet the protection level requirements of the electrical equipment enclosure; and to ensure waterproof sealing.

[0023] 3. The cover plate, vertical plate, first flange edge and second flange edge of this utility model are integrally formed, which achieves high structural strength and a more robust effect.

[0024] 4. The sealing foam of this utility model includes a first sealing edge and a second sealing edge. The upper surface of the first sealing edge is in contact with the lower surface of the first flange edge; the outer surface of the second sealing edge is in contact with the inner surface of the second flange edge; the lower surface of the first sealing edge and the inner surface of the second sealing edge are both in contact with the housing, thereby achieving double sealing and improving the sealing effect.

[0025] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A partial structural schematic diagram of the battery pack in Embodiment 1 of this utility model is shown.

[0028] Figure 2 A schematic diagram of the battery pack installation in Embodiment 2 of this utility model is shown.

[0029] Figure 3 It shows Figure 2 A schematic diagram of the cross-section at point AA.

[0030] Figure 4 It shows Figure 3 Enlarged diagram of point B.

[0031] Figure 5 The diagram shows a front view of the battery pack installation in Embodiment 2 of this utility model.

[0032] Figure 6 A top view of the battery pack cover in Embodiment 2 of this utility model is shown.

[0033] Figure 7 The diagram shows a bottom view of the battery pack cover in Embodiment 2 of this utility model.

[0034] Figure 8A top view schematic diagram of the sealing foam of the battery pack in Embodiment 2 of this utility model is shown.

[0035] Figure 9 The diagram shows a bottom view of the sealing foam of the battery pack in Embodiment 2 of this utility model.

[0036] Figure 10 A schematic diagram of the battery pack housing in Embodiment 2 of this utility model is shown.

[0037] In the diagram, 1 is the cover plate; 11 is the cover plate; 12 is the vertical plate; 13 is the first flange edge; 14 is the second flange edge; 2 is the sealing foam; 21 is the first sealing edge; 22 is the second sealing edge; 3 is the housing; 31 is the first housing surface; 32 is the second housing surface. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0039] Example 1,

[0040] refer to Figure 1 The cover 1 includes a cover plate 11 and a second flange edge 14, which are integrally formed and connected at right angles, forming an L-shape. This achieves high structural strength and a more robust effect. The sealing foam 2 includes a first sealing edge 21 and a second sealing edge 22, which are connected at right angles. The inner surface of the cover plate 11 and the outer surface of the first sealing edge 21 are glued together, as are the inner surface of the second flange edge 14 and the outer surface of the second sealing edge 22. The second sealing edge 22 serves as a seal. The box body 3 includes a first box surface 31 and a second box surface 32. The first box surface 31 is glued to the inner surface of the first sealing edge 21, and the second box surface 32 is glued to the inner surface of the second sealing edge 22. The width of the second sealing edge 22 is smaller than the width of the second flange edge 14, thus preventing the second sealing edge 22 from being exposed on the outside of the second flange edge 14, reducing damage to the second sealing edge 22, and thus improving the sealing effect.

[0041] Example 2,

[0042] refer to Figure 2A battery pack includes a cover 1, a sealing foam 2, and a housing 3. The cover 1 is installed on the upper surface of the housing 3, and the sealing foam 2 is located between the cover 1 and the housing 3, with both sides of the sealing foam 2 abutting against the cover 1 and the housing 3 respectively. The cover 1 includes a cover plate 11 and a second flange edge 14, and the second flange edge 14 is provided at the edge of the lower surface of the cover plate 11. The sealing foam 2 and the housing 3 are installed in the groove formed by the cover plate 11 and the second flange edge 14.

[0043] Specifically, the cover 1 is pressed tightly against the sealing foam 2, and the sealing foam 2 is pressed tightly against the housing 3. This prevents the external environment from affecting the battery cell; maintains the internal pressure balance of the battery; meets the protection level requirements of electrical equipment enclosures; and ensures waterproof sealing. The cover 1, sealing foam 2, and housing 3 of this utility model have a simple structure, are easy to process, and have high practical value.

[0044] Furthermore, the cover plate 11 can be flat or formed into a specific shape according to actual needs, thereby improving the rigidity of the cover body 1; the present invention forms a first sealing edge by the cover plate 11, the first sealing edge 21 and the first housing surface 31, and forms a second sealing edge by the second flange edge 14, the second sealing edge 22 and the second housing surface 32, thus achieving the effect of two seals. At the same time, the sealing performance of the two sealing edges can be further guaranteed by attaching double-sided adhesive to both sides of the first sealing edge 21 and the second sealing edge 22.

[0045] refer to Figure 4 The cover 1 also includes a vertical plate 12 and a first flange edge 13. The cover plate 11, vertical plate 12, first flange edge 13, and second flange edge 14 are connected in sequence. The cover plate 11 is parallel to the first flange edge 13, the vertical plate 12 is parallel to the second flange edge 14, and the cover plate 11 is perpendicular to the vertical plate 12. The box body 3 and the sealing foam 2 are installed in the groove formed by the first flange edge 13 and the second flange edge 14. Specifically, the cover plate 11 can be flat or can be formed into a specific shape according to actual needs, thereby improving the rigidity of the cover 1. This utility model forms a first sealing edge through the first flange edge 13, the first sealing edge 21, and the first box body surface 31, and forms a second sealing edge through the second flange edge 14, the second sealing edge 22, and the second box body surface 32, achieving the effect of two seals. At the same time, the sealing performance of the two sealing edges can be further guaranteed by attaching double-sided adhesive to both sides of the first sealing edge 21 and the second sealing edge 22.

[0046] refer to Figure 6 and Figure 7 The cover plate 11, vertical plate 12, first flange edge 13, and second flange edge 14 are integrally formed. Specifically, the cover plate 11, vertical plate 12, first flange edge 13, and second flange edge 14 are integrally formed, and the cover plate 11, vertical plate 12, first flange edge 13, and second flange edge 14 form a stepped structure (see reference). Figure 3 This achieves a high structural strength and a more robust effect.

[0047] refer to Figure 8 The sealing foam 2 includes a first sealing edge 21 and a second sealing edge 22. The second sealing edge 22 is provided on the lower surface of the first sealing edge 21. The upper surface of the first sealing edge 21 is in contact with the lower surface of the first flange edge 13. The outer surface of the second sealing edge 22 is in contact with the inner surface of the second flange edge 14. The lower surface of the first sealing edge 21 and the inner surface of the second sealing edge 22 are both in contact with the housing 3.

[0048] Specifically, by setting a sealing foam 2, which includes a first sealing edge 21 and a second sealing edge 22, the sealing foam 2 is made L-shaped (see reference). Figure 9 This allows it to adapt to the shape of the cover 1, thereby achieving a double seal and improving the sealing effect.

[0049] refer to Figure 10 The housing 3 includes a first housing surface 31 and a second housing surface 32. The first housing surface 31 is in contact with the lower surface of the first sealing edge 21, and the second housing surface 32 is in contact with the inner surface of the second sealing edge 22.

[0050] Specifically, the side of the housing 3 is a rectangular steel tube, which increases the contact area with the second sealing edge 22, thereby facilitating a tight fit with the first flange edge 13 and the second flange edge 14 and improving the sealing effect.

[0051] Furthermore, the upper and lower surfaces of the first sealing edge 21 are coated with double-sided adhesive or glue; the inner and outer surfaces of the second sealing edge 22 are also coated with double-sided adhesive or glue. Specifically, in order to further achieve a good sealing effect, sealant can be applied to both the inner and outer sides of the sealing foam 2, so that in addition to the tight sealing between the sealing foam 2 and the cover 1 and the box 3, there is also an adhesive seal.

[0052] In this embodiment of the utility model, the battery pack also includes a fixing mechanism, which is fixed through the second flange edge 14, the second sealing edge 22 and the second housing surface 32; and / or the fixing mechanism is fixed through the first flange edge 13, the first sealing edge 21 and the first housing surface 31.

[0053] The fixing mechanism includes bolts and nuts. The bolts pass through the second flange edge 14, the second sealing edge 22, and the second housing surface 32 and are connected to the nuts; and / or the bolts pass through the first flange edge 13, the first sealing edge 21, and the first housing surface 31 and are fixed to the nuts.

[0054] Specifically, the fixing mechanism includes nuts and bolts. During the production of the housing 3, a third circular hole is opened on the second housing surface 32 and / or the first housing surface 31 of the housing 3, and a nut is welded into the inner cavity of the housing 3. Several first circular holes are opened on the second flange edge 14 and / or the first flange edge 13 of the cover 1. Several second circular holes are opened on the first sealing edge 21 and / or the second sealing edge 22 of the sealing foam 2. The first circular holes, second circular holes, and third circular holes are coaxial and are threaded to the nuts in the cavity of the housing 3 by bolts passing through the second housing surface 32, the second sealing edge 22, and the second flange edge 14; or they are threaded to the nuts in the cavity of the housing 3 by bolts passing through the first flange edge 13, the first sealing edge 21, and the first housing surface 31.

[0055] In the above embodiments, another optional implementation is as follows: Specifically, the fixing mechanism includes rivet bolts. During the production of the housing 3, a third circular hole is opened on the second housing surface 32 and / or the first housing surface 31 of the housing 3; a plurality of first circular holes are opened on the second flange edge 14 and / or the first flange edge 13 of the cover 1; a plurality of second circular holes are opened on the first sealing edge 21 and / or the second sealing edge 22 of the sealing foam 2; the first circular holes, the second circular holes, and the third circular holes are coaxial, and the rivet bolts pass through the second housing surface 32, the second sealing edge 22, and the second flange edge 14 to enter the cavity of the housing 3; the second housing surface 32, the second sealing edge 22, and the second flange edge 14 are fixed by tightening the rivet bolts; and / or the rivet bolts pass through the first housing surface 31, the first sealing edge 21, and the first flange edge 13 to enter the cavity of the housing 3; the first housing surface 31, the first sealing edge 21, and the first flange edge 13 are fixed by tightening the rivet bolts.

[0056] Furthermore, the flange portion includes a vertical plate 12 and a first flange edge 13 and a second flange edge 14 connected in sequence.

[0057] Work preparation:

[0058] During the production of the cover body 1, a number of first round holes are provided on the second flange edge 14 and / or the first flange edge 13 and / or the cover plate 11 of the cover body 1.

[0059] When manufacturing the sealing foam 2, a number of second round holes are provided on the first sealing edge 21 and / or the second sealing edge 22 of the sealing foam 2.

[0060] During the production of the box 3, several third circular holes are opened on the second box surface 32 and / or the first box surface 31 of the box 3, and nuts are welded into the inner cavity of the box 3, with the nuts being coaxial with the third circular holes.

[0061] The corresponding first, second, and third circular holes are coaxial.

[0062] Working principle:

[0063] Step 1: Press the first sealing edge 21 of the sealing foam 2 with double-sided adhesive onto the first housing surface 31, and press the second sealing edge 22 of the sealing foam 2 onto the second housing surface 32.

[0064] Step 2: Press the first flange edge 13 of the cover body 1 firmly against the first sealing edge 21 of the sealing foam 2, and press the second flange edge 14 of the cover body 1 firmly against the second sealing edge 22 of the sealing foam 2 (e.g., Figure 2 or Figure 5 (As shown).

[0065] Step 3: Connect the bolts through the second housing surface 32, the second sealing edge 22, and the second flange edge 14 to the nuts inside the housing 3 cavity; and / or connect the bolts through the first flange edge 13, the first sealing edge 21, and the first housing surface 31 to the nuts inside the housing 3 cavity.

[0066] Example 3,

[0067] A battery pack includes battery cells, a housing 3, and a sealing cover for the battery pack, wherein the battery cells are installed in the housing 3, and the sealing cover for the battery pack is installed on the upper surface of the housing 3.

[0068] Example 4,

[0069] An electric vehicle includes a body and the aforementioned battery pack, the battery pack being disposed within the body.

[0070] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sealing box cover for a battery pack, characterized by, Includes a cover (1), which includes a cover plate (11) and a flange portion disposed at the edge of the lower surface of the cover plate (11).

2. The sealed battery pack cover of claim 1, wherein, The flange portion includes a vertical plate (12), a first flange edge (13), and a second flange edge (14) connected in sequence. The vertical plate (12) is connected to the edge of the cover plate (11). The cover plate (11) is parallel to the first flange edge (13), the vertical plate (12) is parallel to the second flange edge (14), and the cover plate (11) is perpendicular to the vertical plate (12). Alternatively, the flange portion may include a second flange edge (14) that is connected to the edge of the cover plate (11).

3. The sealed battery pack cover of claim 2, wherein, The cover plate (11), the vertical plate (12), the first flange edge (13), and the second flange edge (14) are integrally formed; Alternatively, the cover plate (11) and the second flange edge (14) may be integrally formed.

4. A battery pack, characterized by, The device includes sealing foam (2), a housing (3), and a cover (1) as described in any one of claims 2-3. The cover (1) is installed on the upper surface of the housing (3). The sealing foam (2) is located between the cover (1) and the housing (3), and the two sides of the sealing foam (2) abut against the cover (1) and the housing (3) respectively. The sealing foam (2) and the housing (3) are installed in the groove formed by the first flange edge (13) and the second flange edge (14). Alternatively, the sealing foam (2) and the housing (3) are installed in the groove formed by the cover plate (11) and the second flange edge (14).

5. The battery pack of claim 4, wherein, The sealing foam (2) includes a first sealing edge (21) and a second sealing edge (22). The lower surface of the first sealing edge (21) is provided with the second sealing edge (22). The upper surface of the first sealing edge (21) is in contact with the lower surface of the first flange edge (13). The outer surface of the second sealing edge (22) is in contact with the inner surface of the second flange edge (14). Alternatively, the upper surface of the first sealing edge (21) may contact the lower surface of the cover plate (11); the outer surface of the second sealing edge (22) may contact the inner surface of the second flange edge (14); The lower surface of the first sealing edge (21) and the inner surface of the second sealing edge (22) are both in contact with the housing (3).

6. The battery pack of claim 5, wherein, The upper and lower surfaces of the first sealing edge (21) are coated with double-sided adhesive or glue; the inner and outer surfaces of the second sealing edge (22) are coated with double-sided adhesive or glue.

7. The battery pack of claim 5, wherein, The housing (3) includes a first housing surface (31) and a second housing surface (32). The first housing surface (31) is in contact with the lower surface of the first sealing edge (21), and the second housing surface (32) is in contact with the inner surface of the second sealing edge (22).

8. The battery pack of claim 7, wherein, The battery pack also includes a fixing mechanism, which is used to fix the battery pack through the second flange edge (14), the second sealing edge (22), and the second housing surface (32). The fixing mechanism passes through the first flange edge (13), the first sealing edge (21), and the first housing surface (31) for fixing.

9. The battery pack of claim 8, wherein, The fixing mechanism includes a bolt and a nut, wherein the bolt passes through the second flange edge (14), the second sealing edge (22), and the second housing surface (32) and is connected to the nut; And / or a bolt is fixed with a nut by penetrating the first flange (13), the first sealing edge (21) and the first box surface (31).

10. A tram, characterized in that, The vehicle body and the battery pack according to any one of claims 4 to 9 are provided in the vehicle body.

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