Liquid injection sealing structure and battery pack thereof

Abstract

The utility model discloses a liquid injection sealing structure and a battery pack thereof, the liquid injection sealing structure is arranged among a box bottom, a box cover and a panel, and the liquid injection sealing structure comprises a panel sealing ring, a box bottom sealing ring, a first fastener group and a second fastener group; the box cover is of a square opening structure with an opening in the lower portion, the box cover is installed above the box bottom through a first fastener set, a panel containing hole used for containing the panel is formed in the front end of the box cover, and the panel is installed on the box cover and the box bottom through a second fastener set. The panel sealing ring is arranged on the periphery of the panel placing hole in a single-face back adhesive mode. An annular sealing groove set is arranged on the upper surface of the box bottom, a box bottom sealing ring is installed in the sealing groove set, and a hole opening assembly is arranged at the lower end of the box cover and used for injecting a foaming agent into the sealing groove set and observing the injection condition. A front panel and a rear panel are changed into one panel, two vertically-placed large-size sealing rings are changed into the horizontally-placed box bottom sealing ring and the vertically-placed small-size panel sealing ring, and the air tightness is better.

Description

Technical Field

[0001] This utility model relates to the field of sealing, specifically to a liquid injection sealing structure and its battery pack. Background Technology

[0002] Currently, for standard boxes used in heavy-duty trucks, due to size limitations, the structures available on the market are as follows: Figure 1 As shown, it includes a C-shaped cover 1', front and rear panels 2', and a bottom plate 3'. All are constructed by welding the front and rear panels to the profiled box body, and using large three-dimensional sealing rings at both ends of the C-shaped cover 1' for sealing. During installation, the sealing rings must be applied first, followed by the cover. Because the cover is C-shaped, its perpendicularity to the horizontal plane is poor, the flatness of the mounting surface is also poor, and the dimensional tolerances between the covers are large. This causes the mounting holes on the cover to misalign with the holes in the box body. Furthermore, the large bolts on the sealing rings have horizontal, vertical, and beveled surfaces, affecting airtightness and making installation inconvenient.

[0003] Therefore, it is urgent to propose a new solution to the above problems. Summary of the Invention

[0004] This invention provides a liquid injection sealing structure that solves the problem in the prior art where the mounting holes of the cover and the holes of the box body do not align, resulting in poor airtightness and inconvenient installation.

[0005] This utility model provides a liquid injection sealing structure, which is disposed between the bottom of the tank, the cover of the tank and the panel, and includes a panel sealing ring, a bottom sealing ring, a first fastener group and a second fastener group;

[0006] The lid is a square open structure with an opening at the bottom. The lid is installed on the top of the bottom of the box by a first set of fasteners. The front end of the lid has a panel placement hole for placing a panel. The panel is installed on the lid and the bottom of the box by a second set of fasteners.

[0007] The panel sealing ring is set around the panel placement hole by means of single-sided adhesive;

[0008] The upper surface of the bottom of the box is provided with an annular sealing groove group, and the bottom sealing ring is installed in the sealing groove group. The lower end of the box cover is provided with an opening assembly, which is used to inject foaming agent into the sealing groove group and observe the injection situation.

[0009] Furthermore, the first fastener group includes multiple first bolt groups located at the front and rear ends of the box cover and multiple second bolt groups located on the left and right sides of the box cover.

[0010] Furthermore, the box bottom includes a front beam and a rear beam disposed at the front and rear ends of the box bottom. The front beam and the rear beam are each provided with a first through hole. The box bottom is provided with a second through hole corresponding to the first through hole. The front beam and the rear beam are fixedly installed on the box bottom by passing multiple rivet nuts through the first through hole and the second through hole in sequence.

[0011] Furthermore, the bottom of both ends of the cover is provided with a first bend that bends away from the battery pack. A first blind hole is provided on the front beam or rear beam. Multiple sets of the first bolts pass through the first bend to fix the cover in the first blind hole.

[0012] Furthermore, the second fastener group includes a third bolt group and a fourth bolt group. The third bolt group is arranged around the panel placement hole and is used to fix the upper part of the panel to both ends of the cover. The bottom end of the panel is provided with a second bend that bends towards the battery pack. The front beam and the rear beam are both provided with second blind holes. The fourth bolt group passes through the second bend to fix the panel in the second blind hole.

[0013] Furthermore, the front beam and the rear beam are provided with a third blind hole for fixing the module.

[0014] Furthermore, the opening assembly includes an injection hole located on the panel and an overflow hole located on the opposite side of the panel.

[0015] Furthermore, the height of the two sides of the box cover is greater than the height of the two ends of the box cover, and multiple fourth blind holes are provided at intervals on the side of the box bottom. Multiple sets of second bolts pass through the fourth blind holes to fix the box cover on the box bottom.

[0016] Furthermore, the sealing groove assembly includes a first sealing groove disposed on the front beam and the rear beam, and a second sealing groove located on both sides of the bottom of the box, wherein the bottom sealing ring is disposed in the first sealing groove and the second sealing groove.

[0017] This utility model also includes a battery pack, which includes the above-mentioned liquid injection sealing structure.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. This utility model replaces the two front and rear panels with one panel, eliminates the original C-shaped box cover, and replaces the two vertically placed, larger sealing rings with one horizontally placed bottom sealing ring and one vertically placed, smaller panel sealing ring. Only one panel needs to be set at one end of the box cover, which is convenient for installation. Moreover, the box cover has better flatness, is not easy to deform, ensures dimensional consistency, increases the fit between the box bottom and the box cover, and thus makes the airtightness better.

[0020] 2. The front and rear beams of this utility model are made of common mold material, and the five functions of module mounting beam, bottom sealing ring groove, box cover mounting hole position surface, panel mounting hole position surface and whole package mounting beam are all integrated on the front and rear beams, which is simple and convenient. Attached Figure Description

[0021] Figure 1 Diagram of the existing battery pack sealing structure;

[0022] Figure 2 This is an overall view of the battery pack fluid injection sealing structure of this utility model;

[0023] Figure 3 This is a cross-sectional view of the battery pack fluid filling and sealing structure of this utility model;

[0024] Figure 4 This is a partial longitudinal sectional view of the battery pack fluid filling and sealing structure of this utility model;

[0025] Figure 5 This is a partial exploded view of the front end of the battery pack liquid filling and sealing structure of this utility model;

[0026] Figure 6 This is a partial exploded view of the rear end of the battery pack liquid filling and sealing structure of this utility model;

[0027] Reference numerals: 1', C-shaped box cover; 2', front and rear panels; 3', bottom plate; 1, box bottom; 11, sealing groove assembly; 111, first sealing groove; 112, second sealing groove; 12, front beam; 121, first blind hole; 122, third blind hole; 13, rear beam; 14, first through hole; 15, second through hole; 16, fourth blind hole; 17, press-fit nut; 2, box cover; 21, panel placement hole; 22, first bend; 23, opening assembly; 231, injection hole; 232, overflow hole; 3, panel; 31, second bend; 4, panel sealing ring; 5, box bottom sealing ring; 6, first fastener assembly; 61, first bolt assembly; 62, second bolt assembly; 7, second fastener assembly; 71, third bolt assembly; 72, fourth bolt assembly. Detailed Implementation

[0028] To further understand the utility model's content, features, and effects, the following embodiments are provided, along with accompanying drawings. Figures 2-6 The details are as follows.

[0029] like Figures 2-6 As shown, this embodiment provides a liquid injection sealing structure, which is disposed between the bottom of the tank 1, the cover of the tank 2 and the panel 3, including a panel sealing ring 4, a bottom sealing ring 5, a first fastener group 6 and a second fastener group 7.

[0030] The lid 2 is a square open structure with an opening at the bottom. The lid 2 is installed on the top of the bottom 1 of the box by the first fastener group 6. The front end of the lid 2 is provided with a panel placement hole 21 for placing the panel 3. The panel 3 is installed on the lid 2 and the bottom 1 of the box by the second fastener group 7.

[0031] The panel sealing ring 4 is set around the panel placement hole 21 by means of single-sided adhesive;

[0032] The upper surface of the bottom of the box 1 is provided with an annular sealing groove group 11, and the bottom sealing ring 5 is installed in the sealing groove group 11. The lower end of the box cover 2 is provided with an opening component 23, which is used to inject foaming agent into the sealing groove group 11 and observe the injection situation.

[0033] This utility model replaces the two front and rear panels with one panel, eliminates the original C-shaped box cover, and replaces the two vertically placed, larger sealing rings with one horizontally placed bottom sealing ring and one vertically placed, smaller panel sealing ring. Only one panel needs to be set at one end of the box cover, making installation convenient. Moreover, the box cover has better flatness, is not easily deformed, ensures dimensional consistency, and increases the fit between the box bottom and the box cover, thereby improving airtightness.

[0034] like Figure 6 As shown, in this embodiment, the first fastener group 6 includes multiple first bolt groups 61 located at the front and rear ends of the box cover 2 and multiple second bolt groups 62 on the left and right sides of the box cover 2, which are connected by bolts for easy disassembly.

[0035] like Figure 5 and 6 As shown, in this embodiment, the aforementioned box bottom 1 includes a front beam 12 and a rear beam 13 disposed at the front and rear ends of the box bottom 1. Both the front beam 12 and the rear beam 13 have first through holes 14, and the box bottom 1 has second through holes 15 corresponding to the first through holes 14. Multiple rivet nuts 17 are sequentially passed through the first through holes 14 and the second through holes 15 to fix the front beam 12 and the rear beam 13 onto the box bottom 1. The front and rear beams of this utility model are made of common mold material, and all five functions—module mounting beam, box bottom sealing ring groove, box cover mounting hole surface, panel mounting hole surface, and overall package mounting beam—are integrated into the front and rear beams, making it simple and convenient.

[0036] In this embodiment, as Figure 4 As shown, the bottom of both ends of the cover 2 is provided with a first bending part 22 that bends away from the battery pack. The front beam 12 or the rear beam 13 is provided with a first blind hole 121. Multiple first bolt groups 61 pass through the first bending part 22 to fix the cover 2 in the first blind hole 121, thereby fixing the cover 2.

[0037] In this embodiment, as Figure 4 As shown, the second fastener group 7 includes a third bolt group 71 and a fourth bolt group 72. Both the third bolt group 71 and the fourth bolt group 72 include multiple bolts arranged at equal intervals. The third bolt group 71 is arranged around the panel placement hole 21. The third bolt group 71 is used to fix the upper part of the panel 3 to both ends of the cover 2. The bottom end of the panel 3 is provided with a second bending part 31 that bends towards the battery pack. The front beam 12 and the rear beam 13 are both provided with second blind holes (not shown in the figure). The fourth bolt group 72 passes through the second bending part 31 to fix the panel 3 in the second blind hole. In this way, the panel 3 is detachably fixed to the bottom 1 and the cover 2.

[0038] In this embodiment, as Figure 4 As shown, the front beam 12 and the rear beam 13 are provided with a third blind hole 122 for fixing the module (not shown in the figure).

[0039] In this embodiment, as Figure 5 and 6 As shown, the above-mentioned opening assembly 23 includes an injection hole 231 located on the panel 3 and an overflow hole 232 located on the opposite side of the panel 3. There is one injection hole 231 and two overflow holes 232. The foaming agent is injected from the injection hole 231. When the foaming agent is observed to flow out from the overflow hole 232 located at the other end of the bottom of the box 1, the injection is stopped. After a period of time, the foaming agent dries and achieves a sealing effect.

[0040] In this embodiment, as Figure 6 As shown, the height of the two sides of the box cover 2 is greater than the height of the two ends of the box cover 2. The sides of the box bottom 1 are provided with a plurality of fourth blind holes 16 at intervals. A plurality of second bolt groups 62 arranged laterally pass through the fourth blind holes 16 to fix the box cover 2 on the box bottom 1. Through the cooperation of the first bolt group 61 and the second bolt group 62, the box cover 2 is detachably fixed on the box bottom 1.

[0041] In this embodiment, as Figure 5 As shown, the sealing groove group 11 includes a first sealing groove 111 disposed on the front beam 12 and the rear beam 13 and a second sealing groove 112 located on both sides of the bottom of the box 1. The annular bottom sealing ring 5 is disposed in the first sealing groove 111 and the second sealing groove 112.

[0042] This embodiment also provides a battery pack, including the above-described liquid injection sealing structure.

[0043] The above-described utility models are merely illustrative of embodiments of the present invention and should not be construed as limiting the scope of the utility model patent, nor are they intended to impose any limitation on the structure of the embodiments of the present invention. It should be noted that those skilled in the art can make various changes and improvements without departing from the concept of the embodiments of the present invention, and these all fall within the protection scope of the embodiments of the present invention.

Claims

1. A liquid injection sealing structure, disposed between the bottom (1), the cover (2), and the panel (3) of a tank, characterized in that: Includes a panel sealing ring (4), a bottom sealing ring (5), a first fastener group (6), and a second fastener group (7); The lid (2) is a square open structure with an opening at the bottom. The lid (2) is installed on the top of the bottom (1) of the box by the first fastener group (6). The front end of the lid (2) has a panel placement hole (21) for placing the panel (3). The panel (3) is installed on the lid (2) and the bottom (1) of the box by the second fastener group (7). The panel sealing ring (4) is set around the panel placement hole (21) by means of single-sided adhesive; The bottom of the box (1) is provided with an annular sealing groove group (11) on the upper surface. The bottom sealing ring (5) is installed in the sealing groove group (11). The bottom of the box cover (2) is provided with an opening assembly (23) at the lower end. The opening assembly (23) is used to inject foaming agent into the sealing groove group (11) and observe the injection situation.

2. The liquid injection sealing structure according to claim 1, characterized in that: The first fastener group (6) includes a plurality of first bolt groups (61) located at the front and rear ends of the box cover (2) and a plurality of second bolt groups (62) on the left and right sides of the box cover (2).

3. The liquid injection sealing structure according to claim 2, characterized in that: The bottom of the box (1) includes a front beam (12) and a rear beam (13) at the front and rear ends of the bottom of the box (1). The front beam (12) and the rear beam (13) are provided with a first through hole (14). The bottom of the box (1) is provided with a second through hole (15) corresponding to the first through hole (14). The front beam (12) and the rear beam (13) are fixedly installed on the bottom of the box (1) by passing multiple rivet nuts (17) through the first through hole (14) and the second through hole (15) in sequence.

4. The liquid injection sealing structure according to claim 3, characterized in that: The bottom of both ends of the cover (2) is provided with a first bend (22) that bends away from the battery pack. A first blind hole (121) is provided on the front beam (12) or the rear beam (13). Multiple first bolt groups (61) pass through the first bend (22) to fix the cover (2) in the first blind hole (121).

5. The liquid injection sealing structure according to claim 3, characterized in that: The second fastener group (7) includes a third bolt group (71) and a fourth bolt group (72). The third bolt group (71) is arranged around the panel placement hole (21). The third bolt group (71) is used to fix the upper part of the panel (3) to both ends of the cover (2). The bottom end of the panel (3) is provided with a second bend (31) that bends towards the battery pack. The front beam (12) and the rear beam (13) are both provided with second blind holes. The fourth bolt group (72) passes through the second bend (31) to fix the panel (3) in the second blind hole.

6. The liquid injection sealing structure according to claim 3, characterized in that: The front beam (12) and the rear beam (13) are provided with a third blind hole (122) for fixing the module.

7. The liquid injection sealing structure according to claim 1, characterized in that: The opening assembly (23) includes an injection hole (231) located on the panel (3) and an overflow hole (232) located on the opposite side of the panel (3).

8. The liquid injection sealing structure according to claim 2, characterized in that: The height of the two sides of the box cover (2) is greater than the height of the two ends of the box cover (2). The sides of the box bottom (1) are provided with a plurality of fourth blind holes (16) at intervals. A plurality of second bolt groups (62) pass through the fourth blind holes (16) to fix the box cover (2) on the box bottom (1).

9. The liquid injection sealing structure according to claim 3, characterized in that: The sealing groove group (11) includes a first sealing groove (111) disposed on the front beam (12) and the rear beam (13) and a second sealing groove (112) located on both sides of the bottom of the box (1). The bottom sealing ring (5) is disposed in the first sealing groove (111) and the second sealing groove (112).

10. A battery pack, characterized in that: Includes the liquid injection sealing structure as described in any one of claims 1 to 9.

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