Battery pack sealing structure

Abstract

The utility model relates to the field of battery pack sealing, in particular to a battery pack sealing structure, which has the technical scheme that the battery pack sealing structure comprises an inner lining plate arranged on the inner side wall of a plastic upper cover, a bonding piece arranged on one side, tightly attached to the plastic upper cover, of the inner lining plate, and an access cover plate arranged on the outer side of the plastic upper cover, a plug connector is arranged on the side, facing the inner wall of the plastic upper cover, of the lining plate, a sealing gasket is arranged on the side, facing the plastic upper cover, of the access cover plate, and a positioning piece matched with the plug connector is arranged on the access cover plate. The installation structure has the effect that the plastic upper cover and the access cover plate can be conveniently installed or detached.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of battery pack sealing, in particular to a battery pack sealing structure. BACKGROUND

[0002] As the core component of the battery system, the performance parameters of the battery pack are concerned by people, especially the cost price of the battery pack. In order to reduce the cost and increase the benefit, each part of the battery pack is optimized and designed, among which the material of the upper cover of the battery pack is replaced from steel to plastic, but the sealing structure design of the original battery pack upper cover (steel) and the maintenance cover plate is also changed to the sealing structure design of the plastic upper cover and the maintenance cover plate.

[0003] At present, the sealing structure of the steel cover and the maintenance cover plate is mainly sealed through the assembly between the embedded rivet nut in the steel cover, the bolt and the maintenance cover plate. The existing plastic upper cover is mostly made by injection molding or vacuum forming. The injection molding can reserve the embedded hole during injection molding, but when the plastic upper cover is made by the vacuum forming process, the thickness of the plastic upper cover is thin. After the steel cover is replaced by the plastic upper cover made by the vacuum forming process, the upper cover cannot embed the nut, which leads to the failure of the assembly of the plastic upper cover and the maintenance cover plate, affecting the installation stability and the sealing property between the steel cover and the maintenance cover plate. In order to solve this sealing structure problem, the present application provides a battery pack sealing structure. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the assembly problem between the plastic upper cover and the maintenance cover plate, facilitate the installation or disassembly of the plastic upper cover and the maintenance cover plate, the present application provides a battery pack sealing structure.

[0005] The present application provides a battery pack sealing structure, which adopts the following technical scheme:

[0006] A battery pack sealing structure, comprising an inner lining plate arranged on the inner side wall of a plastic upper cover, an adhesive arranged on the side of the inner lining plate close to the plastic upper cover, and a maintenance cover plate arranged on the outer side of the plastic upper cover, wherein the side of the inner lining plate facing the inner wall of the plastic upper cover is provided with a plug-in part, the side of the maintenance cover plate facing the plastic upper cover is provided with a sealing gasket, and the maintenance cover plate is provided with a positioning part matched with the plug-in part.

[0007] By adopting the above technical scheme, the inner lining plate is installed on the inner side of the plastic upper cover and connected with the plastic upper cover through the adhesive and the plug-in part. The adhesive improves the stability of the plug-in part during the plugging process and the stability of the inner lining plate on the plastic upper cover. The maintenance cover plate is connected with the plug-in part through the positioning part. The positioning part, the plug-in part and the inner lining plate cooperate to clamp and position the maintenance cover plate on the plastic upper cover. The sealing gasket improves the sealing property between the maintenance cover plate and the plastic upper cover, reduces the extrusion force of the plastic upper cover during the positioning of the positioning part, avoids the damage of the plastic upper cover during the installation, and facilitates the installation or disassembly of the maintenance cover plate.

[0008] Preferably, the sealing gasket is provided with a mounting hole one for the plug-in part to pass through, and the access cover plate is provided with a mounting hole two in communication with the mounting hole one.

[0009] By adopting the above technical scheme, the mounting hole one and the mounting hole two are convenient for the plug-in part to pass through, and the positioning part is convenient for installation and cooperation with the plug-in part.

[0010] Preferably, the sealing gasket is provided with a connecting part one on the side facing the plastic upper cover, and a connecting part two on the side facing the access cover plate.

[0011] By adopting the above technical scheme, the connecting part one improves the connection stability between the sealing gasket and the plastic upper cover, and the connecting part two improves the connection stability between the sealing gasket and the access cover plate.

[0012] Preferably, the adhesive part is double-sided tape.

[0013] By adopting the above technical scheme, the adhesive part is double-sided tape, which is convenient for the inner lining plate to be installed, improves the stability of the inner lining plate during assembly of the positioning part and the plug-in part, and effectively prevents the inner lining plate from shaking during installation.

[0014] Preferably, the plug-in part includes a positioning part arranged on the inner lining plate and a connecting part arranged at the end of the positioning part away from the inner lining plate, and an outer thread is arranged on the outer side wall of the connecting part.

[0015] By adopting the above technical scheme, the positioning part improves the stability of the plug-in part on the inner lining plate, and the outer thread arranged on the connecting part is convenient for connection with the positioning part.

[0016] Preferably, the positioning part includes a tightening part and a pressing part arranged on the side of the tightening part facing the access cover plate, and a through hole for the plug-in part to pass through is arranged on the tightening part and the pressing part, and an inner thread is arranged on the inner wall of the tightening part and matched with the outer thread of the connecting part.

[0017] By adopting the above technical scheme, the inner thread arranged on the tightening part is convenient for threaded connection with the connecting part, and the pressing part is used to expand the pressing area of the tightening part.

[0018] Preferably, the outer diameter of the pressing part is larger than that of the tightening part.

[0019] By adopting the above technical scheme, the positioning effect of the positioning part is improved.

[0020] In summary, the application installs the maintenance cover plate on the plastic upper cover through the cooperation of the inner lining plate, the positioning piece and the plug-in piece, improves the stability of the maintenance cover plate, ensures the structural stability of the plastic upper cover, avoids the possibility of damage of the plastic upper cover in the installation process, the sealing gasket improves the stability between the maintenance cover plate and the plastic upper cover, and the connecting piece one and the connecting piece two improve the connection stability between the sealing gasket and the maintenance cover plate and the plastic upper cover. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic diagram of a battery pack sealing structure of the application;

[0022] Figure 2 is a sectional view of a battery pack sealing structure of the application;

[0023] Figure 3 is an exploded view of a battery pack sealing structure of the application.

[0024] Mark 1, plastic upper cover; 2, inner lining plate; 3, adhesive piece; 4, maintenance cover plate; 41, mounting hole two; 5, plug-in piece; 51, positioning part; 52, connecting part; 6, sealing gasket; 61, mounting hole one; 7, positioning piece; 71, tightening part; 72, pressing part; 8, connecting piece one; 9, connecting piece two; 10, through hole; 11, bottom plate. DETAILED DESCRIPTION

[0025] The following will be described in detail in combination with the accompanying Figures 1-3 The application will be further described in detail.

[0026] The application discloses a battery pack sealing structure. Referring to Figure 1 and Figure 2 , including the inner lining plate 2, the maintenance cover plate 4, the adhesive piece 3 arranged on the side of the inner lining plate 2 facing the maintenance cover plate 4, the plug-in piece 5 arranged on the inner lining plate 2 and located on the side of the adhesive piece 3, the positioning piece 7 arranged on the side of the maintenance cover plate 4 away from the inner lining plate 2, and the sealing gasket 6 arranged on the side of the maintenance cover plate 4 facing the inner lining plate 2, the positioning piece 7 and the plug-in piece 5 cooperate to connect the maintenance cover plate 4 and the inner lining plate 2. In the installation process, the inner lining plate 2 is installed on the inner side wall of the plastic upper cover 1, the adhesive piece 3 is double-sided adhesive, and other double-sided adhesive materials can be used in the specific implementation process. The side of the adhesive piece 3 is adhered to the inner lining plate 2, the other side of the adhesive piece 3 is adhered to the inner side wall of the plastic upper cover 1, and the plastic upper cover 1 only needs to be provided with a hole for the plug-in piece 5 to pass through, the plug-in piece 5 is plugged through the plastic upper cover 1, the sealing gasket 6, the maintenance cover plate 4 and connected with the positioning piece 7. The maintenance cover plate 4 is located on the outer side of the plastic upper cover 1, the sealing gasket 6 is located between the maintenance cover plate 4 and the plastic upper cover 1, and the sealing property between the maintenance cover plate 4 and the plastic upper cover 1 is improved.

[0027] Referring to Figure 2 andFigure 3 The mounting hole one 61 is provided on the sealing gasket 6 and communicates with the mounting hole two 41 provided on the maintenance cover plate 4, so that the plug-in part 5 is plugged into and connected with the positioning part 7. The plug-in part 5 includes a positioning part 51 mounted on the inner lining plate 2 and a connecting part 52 mounted on the end of the positioning part 51 away from the inner lining plate 2, and an outer thread is provided on the outer side wall of the connecting part 52. The positioning part 7 includes a tightening part 71 and a pressing part 72 provided on the side of the tightening part 71 facing the maintenance cover plate 4, and a through hole 10 is provided on the tightening part 71 and the pressing part 72 for the plug-in part 5 to pass through. An inner thread is provided on the inner wall of the tightening part 71 and matched with the outer thread on the connecting part 52. The maintenance cover plate 4 is connected and fixed with the inner lining plate 2 by screwing, the sealing gasket 6 is deformed by extrusion, and the sealing effect between the maintenance cover plate 4 and the plastic upper cover 1 is improved. The outer diameter of the pressing part 72 is larger than that of the tightening part 71, so as to expand the contact area between the positioning part 7 and the maintenance cover plate 4, reduce the damage of the positioning part 7 to the maintenance cover plate 4 when being tightened, and improve the stability of the positioning part 7.

[0028] With reference to Figure 2 and Figure 3 In the embodiment of the application, the plug-in part 5 is integrally formed with the inner lining plate 2, and in the specific implementation process, the plug-in part 5 and the inner lining plate 2 can be detachably connected, for example, by screwing, buckling or other ways. In the embodiment of the application, a plurality of groups of plug-in parts 5 are provided, and the plurality of plug-in parts 5 are uniformly arranged on the side wall of the inner lining plate 2.

[0029] With reference to Figure 2 and Figure 3 In order to improve the connection stability between the sealing gasket 6 and the maintenance cover plate 4, the connecting part two 9 is mounted on the side of the sealing gasket 6 facing the maintenance cover plate 4, and the connecting part one 8 is mounted on the side of the sealing gasket 6 facing the plastic upper cover 1. In the embodiment of the application, the connecting part one 8 and the connecting part two 9 are double-sided adhesive tapes, which improve the stability of the sealing gasket 6 during installation.

[0030] The implementation principle of the battery pack sealing structure in the embodiment of the application is as follows: first, the plug-in part 5 is aligned with the hole on the plastic upper cover 1, the plug-in part 5 enters the hole, and the side wall of the inner lining plate 2 is tightly attached to the inner wall of the plastic upper cover 1. At this time, the bonding part 3 bonds the inner lining plate 2 and the plastic upper cover 1. At this time, the mounting hole one 61 on the sealing gasket 6 is aligned with the plug-in part 5. Because the bonding part 3 bonds the inner lining plate 2 to the inner wall of the plastic upper cover 1, the inner lining plate 2 has a certain stability and will not move greatly in position, so that the sealing gasket 6 can be aligned. After the sealing gasket 6 is aligned, the sealing gasket 6 is pressed, the connecting part one 8 is tightly attached to the plastic upper cover 1, and the stability of the sealing gasket 6 on the plastic upper cover 1 is improved.

[0031] Then the mounting hole two 41 on the maintenance cover plate 4 is aligned with the plug-in part 5, the maintenance cover plate 4 is pressed tightly against the sealing gasket 6, and the connecting part two 9 improves the stability between the maintenance cover plate 4 and the sealing gasket 6. When the maintenance cover plate 4, the sealing gasket 6 and the inner lining plate 2 are placed in place, the positioning part 7 is screwed with the plug-in part 5, and the maintenance cover plate 4 is clamped and positioned through cooperation of the positioning part 7 and the inner lining plate 2. Finally, the plastic upper cover 1 is installed on the bottom plate 11. The embodiment of the application does not need to embed a nut, simultaneously reduces the compression force on the plastic upper cover 1 when screwing, and ensures the structural stability of the plastic upper cover 1. It is convenient for subsequent workers to install or disassemble, simultaneously improves the practicability of the plastic upper cover 1, and solves the problem that the plastic upper cover 1 is too thin and inconvenient to install.

[0032] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so: equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A battery pack seal structure, characterized by: The utility model provides a plastic cover is provided with inner lining (2), bonding piece (3) and access cover (4) on the outside, the inner lining (2) is provided with the plug -in part (5) on the side of the inner wall of plastic cover (1), and the access cover (4) is provided with sealing gasket (6) on the side of plastic cover (1), and the access cover (4) is provided with the positioning part (7) on the side of plastic cover (1) with the plug -in part (5) cooperation.

2. The battery pack sealing structure of claim 1, wherein: The sealing gasket (6) is provided with mounting hole one (61) for the plug -in part (5) to pass through, and the access cover (4) is provided with mounting hole two (41) in communication with mounting hole one (61).

3. The battery pack sealing structure of claim 1, wherein: The sealing gasket (6) is provided with connecting piece one (8) on the side of plastic cover (1), and the sealing gasket (6) is provided with connecting piece two (9) on the side of access cover (4).

4. The battery pack sealing structure of claim 1, wherein: The bonding piece (3) is double -sided adhesive tape.

5. The battery pack sealing structure of claim 1, wherein: The plug -in part (5) includes positioning part (51) provided on the inner lining (2) and connecting part (52) provided on the end of positioning part (51) away from the inner lining (2), and the outer side wall of connecting part (52) is provided with external thread.

6. The battery pack sealing structure of claim 5, wherein: The positioning part (7) includes tightening part (71) and pressing part (72) provided on the side of access cover (4) of tightening part (71), and the through hole (10) for the plug -in part (5) to pass through is formed in the tightening part (71) and pressing part (72), and the inner wall of the tightening part (71) is provided with internal thread matched with the external thread of connecting part (52).

7. The battery pack seal of claim 6, wherein: The outer diameter of the pressing part (72) is larger than the outer diameter of the tightening part (71).

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