Plugging mechanism for opening of middle cover of battery box body

Abstract

The utility model discloses a plugging mechanism for a middle cover opening of a battery box body, which comprises a sealing plate, a sealing ring is fixedly arranged on the lower side of the sealing plate, the sealing ring is used for sealing the upper surface of a thin-edge structure of the middle cover opening, an inner lock component is arranged on the sealing plate, and the inner lock component is provided with a pressing block positioned below the sealing plate. After the sealing ring is attached to the upper surface of the open thin-edge structure of the middle cover, the inner lock assembly can drive the pressing block to be upwards pressed on the lower surface of the open thin-edge structure of the middle cover, so that the sealing ring is tightly attached to the upper surface of the open thin-edge structure of the middle cover downwards. The sealing plate has the advantages that upward supporting can be formed for the thin-edge structure, it is guaranteed that the middle cover does not deform in the downward pressing process of the sealing plate, and the sealing effect of the sealing plate on the opening of the middle cover is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of airtightness detection of batteries for new energy vehicles, and in particular to a blocking mechanism for an open cover in a battery box. Background Art

[0002] At present, the mainstream power battery box technology in the new energy vehicle market is the CTP structure, which means that the integration from the battery cell to the box omits the intermediate module link, that is, a module-free power battery. The cost of this structure battery pack is relatively high. In order to reduce the manufacturing cost of the whole vehicle, a CTC structure battery pack structure came into being. This structure further combines the battery box cover and the body floor into one, further reduces parts, simplifies production steps, and reduces costs while increasing battery capacity and endurance. As the power source of the whole vehicle, the air tightness of the battery pack of new energy vehicles directly affects the safety of the whole vehicle. Therefore, it is very important to detect the air tightness of the battery pack.

[0003] In terms of physical structure, the battery box of the CTC structure includes a middle cover opening at the top and a main body opening at the bottom. The open end of the middle cover has a circumferential thin edge structure. When performing airtightness testing, the upper and lower open ends need to be sealed, and then the air is inflated into the closed space for testing. In the prior art, the sealing of the middle cover opening at the top of the battery box is usually done by using a sealing plate with a sealing strip, which is manually pressed down. During the process of pressing the sealing plate down, the force of the sealing plate is applied to the thin edge structure of the middle cover. Since the bottom of the thin edge structure of the middle cover lacks a supporting structure, the sealing plate easily deforms the middle cover, thereby affecting the airtightness of the battery box. Utility Model Content

[0004] In view of this, the utility model provides a sealing mechanism for the opening of the middle cover of the battery box, which can provide upward support for the thin-edge structure, ensure that the middle cover will not be deformed during the downward pressing of the sealing plate, and improve the sealing effect of the sealing plate on the opening of the middle cover.

[0005] To achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A sealing mechanism for an open middle cover of a battery box, the key of which is that it includes a sealing plate, a sealing ring is fixedly provided on the lower side of the sealing plate, the sealing ring is used to seal on the upper surface of the thin-edge structure of the open middle cover, an inner locking assembly is installed on the sealing plate, the inner locking assembly has a pressing block located below the sealing plate, when the sealing ring is attached to the upper surface of the thin-edge structure of the open middle cover, the inner locking assembly can drive the pressing block to press upward on the lower surface of the thin-edge structure of the open middle cover, so that the sealing ring is tightly attached downward on the upper surface of the thin-edge structure of the open middle cover.

[0007] By adopting the above structure, when sealing the opening of the middle cover on the upper part of the battery box, the sealing plate is placed on the opening of the middle cover, and the sealing ring can fit on the upper surface of the thin edge structure of the middle cover opening. When the sealing plate is pressed down, the pressure block is pressed upward to the lower surface of the thin edge structure of the middle cover opening through the internal locking assembly, which can effectively provide upward support for the thin edge structure, which is equivalent to fixing the sealing ring by clamping up and down, ensuring that the middle cover will not be deformed when the sealing plate is pressed down.

[0008] Preferably, the inner locking assembly comprises an inner buckle connecting rod structure arranged below the sealing plate, the pressure block is assembled on the outer end of the inner buckle connecting rod structure, and a driving assembly is installed on the sealing plate, the driving assembly is used to control the movement of the inner buckle connecting rod structure so that the pressure block can press upwards against the lower surface of the open thin-edge structure of the middle cover or move downwards away from the lower surface of the open thin-edge structure of the middle cover.

[0009] Preferably, the driving assembly comprises a cylinder body fixed above the sealing plate and a cylinder rod capable of telescopic movement relative to the cylinder body, the cylinder rod passes through the sealing plate downward and extends downward, a linkage seat is fixedly connected to the lower end of the cylinder rod, and the linkage seat is rotatably connected to the inner buckle connecting rod structure through a linkage sheet;

[0010] The linkage seat moves downward, and under the linkage action of the linkage piece and the inner buckle connecting rod structure, it can drive the pressing block to rotate upward to the lower surface of the open thin edge structure of the middle cover;

[0011] The linkage seat moves upward, and under the linkage action of the linkage piece and the inner buckle connecting rod structure, it can drive the pressing block downward away from the lower surface of the open thin edge structure of the middle cover and retract it to below the sealing plate.

[0012] Preferably: the inward-link structure includes a hinge seat fixed on the lower side of the sealing plate, and a first link, a second link, and a third link hinged in sequence, wherein the first link and the third link are hinged on the hinge seat at one end away from the second link, and the hinge seat, the first link, the second link, and the third link constitute a four-bar linkage, the third link is provided with an outwardly extending extension portion, the pressure block is fixedly connected to the extension portion, one end of the linkage piece is hinged to the linkage seat, and the other end is hinged to the end of the first link away from the hinge seat.

[0013] Preferably, a flange support plate is disposed on the middle fixing sleeve of the cylinder rod, and a limit plate is disposed on the sealing plate at a position corresponding to the flange support plate, wherein the limit plate is used to limit the downward sliding distance of the cylinder rod.

[0014] Preferably, a connecting hole is provided on the sealing plate, and the cylinder rod can be slidably inserted into the connecting hole up and down. An annular sealing sleeve is provided on the upper side of the connecting hole, and a sealing groove adapted to the upper structure of the annular sealing sleeve is provided on the lower side of the flange supporting plate.

[0015] Preferably, a sealing rubber ring is provided between the limiting disk and the sealing plate.

[0016] Preferably, the lower end of the cylinder rod is fixedly connected to the linkage seat via a driving plate, and the linkage seat is fixedly assembled on the lower side of the driving plate.

[0017] Preferably, a guide column extending vertically downward is distributed on the lower side of the sealing plate, the guide column penetrates the thickness direction of the driving plate, and the driving plate can slide up and down along the guide column.

[0018] Preferably, the device further comprises a supporting bottom plate, on which a lifting drive assembly for controlling the up and down movement of the sealing plate is provided.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] 1. By using the sealing mechanism for the middle cover opening of the battery case provided by the utility model, when sealing the middle cover opening on the upper part of the battery case, the sealing plate is placed on the middle cover opening, and the sealing ring can fit on the upper surface of the thin edge structure of the middle cover opening. During the process of pressing the sealing plate downward, the pressure block is pressed upward against the lower surface of the thin edge structure of the middle cover opening through the inner locking assembly, which can effectively form an upward support for the thin edge structure, which is equivalent to fixing the sealing ring in an upper and lower clamping manner, ensuring that the middle cover will not be deformed during the process of pressing the sealing plate downward. At the same time, the downward force of the sealing ring counteracts the upward force of the pressure block, so that the sealing ring is pressed more tightly, further improving the sealing effect of the sealing plate on the middle cover opening.

[0021] 2. The sealing mechanism for the middle cover opening of the battery box provided by the utility model is adopted, and the inward-linking rod structure forms a four-link mechanism, which can better control the rotation of the pressure block to the lower surface of the thin edge structure of the middle cover opening or to be retracted to the lower side of the sealing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a sealing mechanism for an open cover in a battery box;

[0023] Figure 2 A reference diagram of the use state of the sealing mechanism for the cover opening of the battery box;

[0024] Figure 3 for Figure 2 A partial enlarged view of point D in the middle;

[0025] Figure 4 A partial cross-sectional view of a sealing mechanism for an opening of a cover in a battery box;

[0026] Figure 5 A three-dimensional cross-sectional view showing the connection relationship between the driving assembly 4 and the sealing plate 1;

[0027] Figure 6 for Figure 5 A partial enlarged view of point E in the middle. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with embodiments and drawings.

[0029] like Figure 1 and 2 As shown, a sealing mechanism for the middle cover opening of a battery box body comprises a sealing plate 1, which seals the middle cover opening A1 of the battery box body A, and a sealing ring 1a is fixedly arranged on the lower side of the sealing plate 1. Figure 4 As shown, the sealing plate 1 is placed on the middle cover opening A1, so that the sealing ring 1a can fit on the upper surface of the thin edge structure A11 of the middle cover opening A1. In this embodiment, the circumferential edge of the lower side of the sealing plate 1 has a edging structure 1c extending downward, and the sealing ring 1a is fixedly embedded in the bottom of the edging structure 1c, so that the sealing ring 1a can better act on the thin edge structure A11 when sealing. An inner locking assembly 3 is installed on the sealing plate 1, and the inner locking assembly 3 has a pressing block a located below the sealing plate 1. When the sealing ring 1a fits on the upper surface of the thin edge structure A11 of the middle cover opening A1, the inner locking assembly 3 can press the pressing block a upward against the lower surface of the thin edge structure A11 of the middle cover opening A1.

[0030] Based on the above structural design, when the middle cover opening A1 of the battery box A is blocked, the sealing plate 1 is placed on the middle cover opening, and the sealing ring 1a can be sealed on the upper surface of the thin edge structure of the middle cover opening. During the process of pressing the sealing plate 1 downward, the inner locking assembly 3 can press the pressing block a upward on the lower surface of the thin edge structure A11 of the middle cover opening A1, so as to form a strong support for the lower side of the thin edge structure A11, thereby achieving the blocking of the middle cover opening A1 of the battery box A. Such a sealing method can effectively form an upward support for the thin edge structure A11, ensuring that the middle cover will not be deformed during the process of pressing the sealing plate 1 downward. At the same time, the downward force of the sealing ring 1a counteracts the upward force of the pressing block a, so that the sealing ring 1a fits more closely with the upper surface of the thin edge structure A11, further improving the sealing effect of the sealing plate 1 on the middle cover opening A11.

[0031] like Figures 1 to 3 As shown, the plugging mechanism for the open cover of the battery box also includes a supporting bottom plate 10, and a lifting drive assembly 2 for controlling the up and down movement of the sealing plate 1 is provided on the supporting bottom plate 10. The use of the lifting drive assembly 2 to control the up and down movement of the sealing plate 1 can help to realize the automatic detection of the air tightness of the CTC structure battery box. In this embodiment, the lifting drive assembly 2 includes a stand 2a fixed on the supporting bottom plate 10, and a lifting plate 2b sliding up and down along the height direction of the stand 2a. The sealing plate 1 is fixedly connected to the lifting plate 2b, and the sealing plate 1 can be driven to move up and down by controlling the lifting plate 2b to slide up and down through the cylinder assembly.

[0032] Please refer to Figure 4 and 5 The inner locking assembly 3 includes an inner buckle connecting rod structure 31 distributed below the sealing plate 1, and the pressing block a is assembled at the outer end of the inner buckle connecting rod structure 31. Figure 1 It can be seen that a driving assembly 4 is installed on the sealing plate 1, and the driving assembly 4 is used to control the movement of the inner buckle connecting rod structure 31, so that the pressure block a can press upward against the lower surface of the thin-edge structure A11 of the middle cover opening A1 or move downward away from the lower surface of the thin-edge structure A11 of the middle cover opening A1. After the sealing plate 1 is compacted on the middle cover opening A1, the driving assembly 4 drives the inner buckle connecting rod structure 31, driving the pressure block a to press upward against the lower surface of the thin-edge structure A11 to form an upward support for the thin-edge structure A11. After the detection is completed, the driving assembly 4 drives the inner buckle connecting rod structure 31, driving the pressure block a to move downward away from the lower surface of the thin-edge structure A11, and fold inward into the space surrounded by the edging structure 1c, so as to facilitate the sealing plate 1 to move upward away from the middle cover opening A1.

[0033] Further, refer to Figure 5 The driving assembly 4 includes a cylinder body 4a fixed on the sealing plate 1 and a cylinder rod 4b that can move up and down relative to the cylinder body 4a. The cylinder rod 4b penetrates the thickness direction of the sealing plate 1 downward and extends downward. The cylinder rod 4b is slidably connected with the sealing plate 1. In this embodiment, a mounting frame 11 is fixed on the sealing plate 1, and the cylinder body 4a is fixedly assembled on the lower side of the mounting frame 11. Figure 4 It can be seen that the lower end of the cylinder rod 4b is fixedly connected with a linkage seat 4c, and the linkage seat 4c is rotatably connected to the inner buckle connecting rod structure 31 through the linkage piece 4d. The cylinder rod 4b drives the linkage seat 4c to move downward, and under the linkage action of the linkage piece 4d and the inner buckle connecting rod structure 31, it can drive the pressing block a to rotate upward to the lower surface of the thin edge structure A11; the cylinder rod 4b drives the linkage seat 4c to move upward, and under the linkage action of the linkage piece 4d and the inner buckle connecting rod structure 31, it can drive the pressing block a downward away from the lower surface of the thin edge structure A11 and retract to the bottom of the sealing plate 1.

[0034] like Figure 4As shown, the inner link structure 31 includes an articulated seat 3a fixed on the lower side of the sealing plate 1, and a first link 3b, a second link 3c and a third link 3d which are articulated in sequence, wherein the ends of the first link 3b and the third link 3d which are away from the second link 3c are both articulated on the articulated seat 3a, that is, the upper ends of the first link 3b and the upper ends of the third link 3d are respectively articulated on the two ends of the articulated seat 3a, and the articulated seat 3a, the first link 3b, the second link 3c and the third link 3d constitute a four-bar linkage. The third link 3d is provided with an extension portion 3e extending outward, and the pressure block a is fixedly connected to the extension portion 3e. One end of the linkage piece 4d is articulated with the linkage seat 4c, and the other end is articulated with the end of the first link 3b which is away from the articulated seat 3a. In this embodiment, the first link 3b and the second link 3c are both arc-shaped structures that bend outward. The linkage seat 4c moves downward, and under the linkage of the linkage piece 4d and the four-bar mechanism, it can drive the pressure block a to rotate from bottom to top in an inward-locking manner to the lower surface of the thin-edge structure A11; the linkage seat 4c moves upward, and under the linkage of the linkage piece 4d and the four-bar mechanism, it can drive the pressure block a to move inwardly away from the lower surface of the thin-edge structure A11 first downward and then fold upward to the initial position, and the movement trajectory of the pressure block a is an arc line.

[0035] Further, such as Figure 1 and 3 As shown, a flange support plate 5 is fixedly mounted in the middle of the cylinder rod 4b, and a limit plate 6 is disposed on the sealing plate 1 at a position corresponding to the flange support plate 5, and the limit plate 6 can limit the downward sliding distance of the cylinder rod 4b. When the flange support plate 5 abuts against the limit plate 6, the pressing block a can be supported on the lower surface of the thin edge structure A11.

[0036] For example Figure 5 and 6 As shown, the sealing plate 1 is provided with a connection hole 1b, and the cylinder rod 4b can be slidably inserted into the connection hole 1b, and an annular sealing sleeve 7 is provided on the upper side of the connection hole 1b, and the lower side of the flange support plate 5 has a sealing groove 5a adapted to the upper structure of the annular sealing sleeve 7. When the flange support plate 5 abuts against the limiting plate 6, the upper end of the annular sealing sleeve 7 abuts upward in the sealing groove 5a, ensuring the sealing of the sealing plate 1. A sealing rubber ring 8 is provided between the limiting plate 6 and the sealing plate 1, ensuring that there is no gap between the limiting plate 6 and the sealing plate 1, thereby ensuring the sealing effect of the sealing plate 1.

[0037] Please refer to Figure 4The lower end of the cylinder rod 4b is fixedly connected to the linkage seat 4c through the driving plate 4f. The linkage seat 4c is fixedly assembled on the lower side of the driving plate 4f. The cylinder rod 4b drives the driving plate 4f to move up and down, which can drive the linkage seat 4c to move up and down. In this embodiment, in order to ensure the stability of the structure and the lower surface of the thin-edge structure A11 can be evenly supported, multiple groups of linkage seats 4c are distributed along the circumferential direction on the lower side of the driving plate 4f, and the inner connecting rod structure 31 corresponds to the linkage seat 4c. In this way, the lower surface of the thin-edge structure A11 can be evenly supported. In this embodiment, multiple groups of drive components 4 can be set on the sealing plate 1 to ensure the stability of its operation.

[0038] Further, such as Figure 4 and 5 As shown, a guide column 9 extending vertically downward is distributed on the lower side of the sealing plate 1, and the guide column 9 penetrates the thickness direction of the driving plate 4f, and the driving plate 4f can slide up and down along the guide column 9. The guide column 9 plays a guiding role to ensure that the driving plate 4f always moves in the vertical direction.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes fall within the scope of protection of the present invention.

Claims

1. A sealing mechanism for an open cover of a battery box, characterized in that: The invention comprises a sealing plate (1), a sealing ring (1a) is fixedly arranged on the lower side of the sealing plate (1), the sealing ring (1a) is used to seal the upper surface of the open thin-edge structure of the middle cover, an inner locking component (3) is installed on the sealing plate (1), the inner locking component (3) has a pressing block (a) located below the sealing plate (1), when the sealing ring (1a) is in contact with the upper surface of the open thin-edge structure of the middle cover, the inner locking component (3) can drive the pressing block (a) to press upwards against the lower surface of the open thin-edge structure of the middle cover, so that the sealing ring (1a) is tightly in contact downwards against the upper surface of the open thin-edge structure of the middle cover.

2. The sealing mechanism for the opening of the cover of the battery box according to claim 1, characterized in that: The inner locking assembly (3) comprises an inner buckle connecting rod structure (31) arranged below the sealing plate (1), the pressing block (a) is assembled on the outer end of the inner buckle connecting rod structure (31), and a driving assembly (4) is installed on the sealing plate (1), and the driving assembly (4) is used to control the movement of the inner buckle connecting rod structure (31) so that the pressing block (a) can press upward against the lower surface of the open thin-edge structure of the middle cover or move downward away from the lower surface of the open thin-edge structure of the middle cover.

3. The sealing mechanism for the opening of the cover of the battery box according to claim 2, characterized in that: The driving assembly (4) comprises a cylinder body (4a) fixed above the sealing plate (1) and a cylinder rod (4b) capable of telescopic movement relative to the cylinder body (4a); the cylinder rod (4b) penetrates downward through the sealing plate (1) and extends downward; a linkage seat (4c) is fixedly connected to the lower end of the cylinder rod (4b); the linkage seat (4c) is rotatably connected to the inner buckle connecting rod structure (31) via a linkage plate (4d); The linkage seat (4c) moves downward, and under the linkage action of the linkage piece (4d) and the inner buckle connecting rod structure (31), it can drive the pressing block (a) to rotate upward to the lower surface of the open thin edge structure of the middle cover; The linkage seat (4c) moves upwards, and under the linkage action of the linkage piece (4d) and the inner buckle connecting rod structure (31), it can drive the pressing block (a) downward away from the lower surface of the open thin edge structure of the middle cover and retract it to below the sealing plate (1).

4. The sealing mechanism for the opening of the cover of the battery box according to claim 3, characterized in that: The inner link structure (31) includes a hinge seat (3a) fixed on the lower side of the sealing plate (1), and a first link (3b), a second link (3c), and a third link (3d) hinged in sequence, wherein the ends of the first link (3b) and the third link (3d) away from the second link (3c) are hinged on the hinge seat (3a), and the hinge seat (3a), the first link (3b), the second link (3c), and the third link (3d) constitute a four-bar mechanism, and the third link (3d) is provided with an extension portion (3e) extending outward, the pressure block (a) is fixedly connected to the extension portion (3e), and one end of the linkage plate (4d) is hinged to the linkage seat (4c), and the other end is hinged to the end of the first link (3b) away from the hinge seat (3a).

5. The sealing mechanism for the opening of the cover of the battery box according to claim 3, characterized in that: A flange support plate (5) is provided on the fixed sleeve in the middle of the cylinder rod (4b), and a limit plate (6) is provided on the sealing plate (1) at a position corresponding to the flange support plate (5), and the limit plate (6) is used to limit the downward sliding distance of the cylinder rod (4b).

6. The sealing mechanism for the opening of the cover of the battery box according to claim 5, characterized in that: The sealing plate (1) is provided with a connecting hole (1b), the cylinder rod (4b) is slidably inserted into the connecting hole (1b) up and down, an annular sealing sleeve (7) is provided on the upper side of the connecting hole (1b), and the lower side of the flange support plate (5) has a sealing groove (5a) adapted to the upper structure of the annular sealing sleeve (7).

7. The sealing mechanism for the opening of the cover of the battery box according to claim 5, characterized in that: A sealing rubber ring (8) is provided between the limiting plate (6) and the sealing plate (1).

8. The sealing mechanism for the opening of the cover of a battery box according to claim 3, characterized in that: The lower end of the cylinder rod (4b) is fixedly connected to the linkage seat (4c) via a driving plate (4f), and the linkage seat (4c) is fixedly assembled on the lower side of the driving plate (4f).

9. The sealing mechanism for the opening of the cover of the battery box according to claim 8, characterized in that: A guide column (9) extending vertically downward is distributed on the lower side of the sealing plate (1); the guide column (9) penetrates the driving plate (4f) in the thickness direction, and the driving plate (4f) can slide up and down along the guide column (9).

10. The sealing mechanism for the opening of the cover of a battery box according to claim 1, characterized in that: It also comprises a supporting bottom plate (10), on which a lifting drive assembly (2) for controlling the upward and downward movement of the sealing plate (1) is provided.

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