Shell sealing structure of lithium battery and lithium battery

Abstract

The utility model belongs to the technical field of lithium batteries, and particularly relates to a lithium battery shell sealing structure and a lithium battery, the lithium battery shell sealing structure comprises an upper shell and a lower shell which are covered, a sealing gap is formed between the upper shell and the lower shell, and a protective cover, a waterproof assembly and a plurality of locking mechanisms are sequentially arranged in the sealing gap from top to bottom. The waterproof assembly is used for conducting waterproof plugging on the sealing gap, the locking mechanisms are used for locking and installing the upper shell on the lower shell, the protective cover covers the waterproof assembly and the locking mechanisms, and the protective cover is used for switching the sealing gap from the transverse direction to the longitudinal direction downwards. A lateral sealing gap between the upper shell and the lower shell is changed into longitudinal downward distribution through the protection cover, so that the waterproof assembly in the sealing gap can be protected, the waterproof assembly is prevented from being exposed, and the service life of the waterproof assembly is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium batteries, and in particular relates to a shell sealing structure of a lithium battery and a lithium battery. Background Art

[0002] Lithium batteries are mainly composed of three parts: battery cells, protection boards and shells.

[0003] like Figure 1 As shown, the shell includes an upper shell and a lower shell. The upper shell covers the battery cell and the protection plate in the lower shell. The upper shell and the lower shell are connected and fixed on the outside by bolts. Generally, a waterproof gasket is added between the upper shell and the lower shell. The gap between the upper shell and the lower shell is waterproof and sealed by the waterproof gasket. However, since the edge parts of the bolts and the waterproof gaskets are exposed to the external space for a long time, the bolts are aged and rusted, and the waterproof gaskets are aged, deteriorated and hardened, etc., which affects the waterproof effect of the shell. Utility Model Content

[0004] The purpose of the utility model is to provide a lithium battery shell sealing structure and a lithium battery, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a battery shell sealing structure, comprising: a covering upper shell and a lower shell, a sealing gap is formed between the upper shell and the lower shell, and a protective cover, a waterproof component and a plurality of locking mechanisms are arranged in the sealing gap from top to bottom, the waterproof component is used to waterproof the sealing gap, the plurality of locking mechanisms are used to lock the upper shell on the lower shell, the protective cover is arranged on the outside of the waterproof component and the locking mechanism, and the protective cover is used to switch the sealing gap from horizontal to vertical downward.

[0006] Preferably, the waterproof component includes a mounting ring seat and a waterproof gasket, the mounting ring seat is an annular structure, and the mounting ring seat is installed on the outside of the top of the lower shell body, the edge position of the protective cover is arranged on the outside of the mounting ring seat, the waterproof gasket is arranged between the protective cover and the mounting ring seat, and the multiple locking mechanisms are all arranged at the bottom of the mounting ring seat.

[0007] Preferably, an installation space is formed between the bottom of the installation ring seat and the protective cover, and a sealing component is provided in the installation space, and the sealing component is used to seal the plurality of locking mechanisms.

[0008] Preferably, the sealing assembly comprises a waterproof gel, and the waterproof gel is filled in the installation space.

[0009] Preferably, a ring groove is provided at the top of the mounting ring seat along the edge, and the waterproof gasket is embedded in the ring groove.

[0010] Preferably, the locking mechanism includes a bolt column and a nut threaded on the bottom end of the bolt column, the top of the bolt column is welded to the top of the inside of the protective cover, and the mounting ring seat has a recessed hole penetrating from bottom to top to accommodate the corresponding bolt column, and the nut is arranged in the recessed hole.

[0011] Preferably, a plug is provided at the bottom of the recessed hole to protect the nut, one end of the plug is inserted into the recessed hole, a skirt is provided at the bottom edge of the plug, and a recessed groove for accommodating the skirt is opened at the bottom of the recessed hole.

[0012] Preferably, the protective cover includes two parts, a cover top and a cover wall, both of which are annular structures, the inner circle of the cover top is welded to the outer wall of the bottom of the upper shell body, and the top end of the cover wall is welded to the bottom of the edge of the cover top.

[0013] The present invention also provides a lithium battery, which includes the battery shell sealing structure disclosed above, wherein a battery compartment is formed between the upper shell and the lower shell, and a lithium battery body is arranged in the battery compartment.

[0014] Preferably, mounting seats are installed on the inner walls around the battery compartment, and each of the mounting seats abuts against the side wall of the lithium battery body.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] (1) The utility model adds a protective cover to replace the lateral sealing gap between the upper shell and the lower shell with a longitudinal downward distribution, thereby protecting the waterproof component in the sealing gap, avoiding leakage of the waterproof component, and increasing the service life of the waterproof component.

[0017] (2) The utility model adds a mounting ring seat and a waterproof gasket, and a sealing gap with an L-shaped cross section can be formed inside the protective cover through the mounting ring seat, so that the waterproof gasket can be hidden and installed between the protective cover and the mounting ring seat.

[0018] (3) The utility model adds a sealing component to seal the bottom end of the locking mechanism, thereby preventing the locking mechanism from being exposed to the external space, thereby increasing the service life of the locking mechanism.

[0019] (4) The utility model adds a plug to protect the end of the recessed hole, thereby preventing the waterproof gel from entering the recessed hole, thereby facilitating the removal of the nut from the recessed hole at a later time, and further facilitating the disassembly and assembly of the upper shell and the lower shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a front view of the prior art;

[0021] Figure 2 It is a front view of the utility model;

[0022] Figure 3 It is a three-dimensional diagram of the utility model;

[0023] Figure 4 It is a three-dimensional diagram of the upper shell of the utility model;

[0024] Figure 5 It is a three-dimensional diagram of the lower shell of the utility model;

[0025] Figure 6 It is a cross-sectional view of the utility model;

[0026] Figure 7 for Figure 6 Enlarged view of point A in the middle;

[0027] Figure 8 It is a three-dimensional diagram of the plug of the utility model;

[0028] In the figure: 1. upper shell; 2. protective cover; 3. lower shell; 4. bolt column; 5. mounting ring seat; 6. recessed hole; 7. ring groove; 8. lithium battery body; 9. mounting seat; 10. waterproof gasket; 11. nut; 12. plug; 13. waterproof gel; 14. skirt; 15. recessed groove. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] refer to Figure 2-6 As shown, the shell sealing structure of the battery provided by the utility model includes: an upper shell 1 and a lower shell 3 that are covered, a sealing gap is formed between the upper shell 1 and the lower shell 3, and a protective cover 2, a waterproof component and a plurality of locking mechanisms are arranged in the sealing gap from top to bottom. The waterproof component is used to waterproof the sealing gap, and the plurality of locking mechanisms are used to lock the upper shell 1 on the lower shell 3. The protective cover 2 is arranged on the outside of the waterproof component and the locking mechanism, and the protective cover 2 is used to switch the sealing gap from horizontal to vertical downward.

[0031] As mentioned above, when using the upper shell 1, lower shell 3, protective cover 2, waterproof assembly and multiple locking mechanisms provided by the utility model, the waterproof assembly is placed on the lower shell 3, and the upper shell 1 is moved to the top of the lower shell 3, and the upper shell 1 is covered on the lower shell 3. At this time, the protective cover 2 and the lower shell 3 are locked and installed through multiple locking mechanisms. At this time, the protective cover 2 covers the outside of the waterproof assembly and the multiple locking mechanisms, and the top and sides of the waterproof assembly and the multiple locking mechanisms are protected by the protective cover 2 to prevent rainwater from entering the sealed gap. At the same time, the contact between the waterproof assembly and the external environment is reduced, and the service life of the waterproof assembly is improved.

[0032] Further, in order to waterproof the upper shell 1 and the lower shell 3, refer to Figure 6-7 As shown, the waterproof assembly includes a mounting ring seat 5 and a waterproof gasket 10. The mounting ring seat 5 is an annular structure, and the mounting ring seat 5 is mounted on the outer side of the top of the lower shell 3. The edge of the protective cover 2 is covered on the outside of the mounting ring seat 5. The waterproof gasket 10 is arranged between the protective cover 2 and the mounting ring seat 5, and multiple locking mechanisms are arranged at the bottom of the mounting ring seat 5. The mounting ring seat 5 provides a mounting position for the upper shell 1 and the waterproof gasket 10. When the protective cover 2 is covered on the mounting ring seat 5, the waterproof gasket 10 is located between the two. At this time, the protective cover 2 can be locked and installed on the mounting ring seat 5 through multiple locking mechanisms. At this time, the upper shell 1 can be locked and installed on the lower shell 3. At the same time, when the protective cover 2 is locked on the mounting ring seat 5, the waterproof gasket 10 will be squeezed, so that the sealing gap is squeezed and blocked by the squeezed waterproof gasket 10.

[0033] Further, in order to allow the protective cover 2 to cover the outside of the sealing gap, refer to Figure 7 As shown, the protective cover 2 includes two parts, a cover top and a cover wall. Both the cover top and the cover wall are annular structures. The inner circle of the cover top is welded to the outer wall at the bottom of the upper shell 1, and the top of the cover wall is welded to the bottom of the edge of the cover top. When the cover top of the protective cover 2 is covered with the mounting ring seat 5, the waterproof component is pressed, so that the sealing gap is filled and sealed by the squeezed waterproof component. At this time, the cover wall of the protective cover 2 covers the outside of the sealing gap and the mounting ring seat 5, so that the sealing gap is blocked by the cover wall. At this time, the sealing gap is changed from the side to the vertical downward by the protective cover 2, so as to prevent the waterproof component from contacting with the outside and prevent rainwater from falling on it.

[0034] In the present utility model, combined with Figure 6-7 As shown, an installation space is formed between the bottom of the installation ring seat 5 and the protective cover 2 of this embodiment, and a sealing component is provided in the installation space, and the sealing component is used to seal multiple locking mechanisms.

[0035] Combination Figure 7 As shown, the sealing assembly includes a waterproof gel 13, and the waterproof gel 13 is filled in the installation space.

[0036] As mentioned above, when using the sealing assembly provided by the utility model, when multiple locking mechanisms are installed on the mounting ring seat 5, the waterproof gel 13 is filled between the bottom of the mounting ring seat 5 and the protective cover 2, thereby forming a sealing layer for sealing at the bottom of the multiple locking mechanisms.

[0037] Further, in order to position the waterproof gasket 10, refer to Figure 5-7 As shown, a ring groove 7 is provided at the top of the mounting ring seat 5 along the edge, and a waterproof gasket 10 is embedded and installed in the ring groove 7. The waterproof gasket 10 can be positioned on the mounting ring seat 5 through the ring groove 7 to prevent the upper shell 1 and the lower shell 3 from moving when they are covered.

[0038] In the present utility model, combined with Figure 4-7 As shown, the locking mechanism of this embodiment includes a bolt column 4 and a nut 11 threaded on the bottom end of the bolt column 4, the top of the bolt column 4 is welded to the top of the inside of the protective cover 2, and the mounting ring seat 5 is provided with a recessed hole 6 from bottom to top to accommodate the corresponding bolt column 4, and the nut 11 is arranged in the recessed hole 6.

[0039] As mentioned above, when using the locking mechanism provided by the utility model, the top end of the bolt column 4 in the locking mechanism is welded in the protective cover 2, and the upper shell 1 is placed above the lower shell 3. At this time, multiple bolt columns 4 are respectively above the corresponding recessed holes 6, and the upper shell 1 is lowered to cover the lower shell 3. At this time, multiple bolt columns 4 are respectively movable through the corresponding recessed holes 6, so that one end of the bolt column 4 is inside the recessed hole 6. At this time, the nut 11 is screwed on the bolt column 4 in the recessed hole 6, so that the upper shell 1 is locked and installed on the mounting ring seat 5.

[0040] Further, in order to prevent the waterproof gel 13 from entering the recessed hole 6, refer to Figure 7-8 As shown, a plug 12 is also provided at the bottom of the recessed hole 6 to protect the nut 11. One end of the plug 12 is inserted into the recessed hole 6. A skirt 14 is provided at the bottom edge of the plug 12. A recessed groove 15 for accommodating the skirt 14 is provided at the bottom of the recessed hole 6. The plug 12 can be used to seal the end of the recessed hole 6 to prevent the waterproof gel 13 from entering the recessed hole 6. When the plug 12 is inserted into the recessed hole 6, the skirt 14 on the plug 12 is embedded in the recessed groove 15, so that the plug 12 is flush with the ground on which the ring seat 5 is installed.

[0041] The present invention also provides a lithium battery. Figure 6 As shown, it includes the battery shell sealing structure disclosed above, a battery compartment is formed between the upper shell 1 and the lower shell 3, and a lithium battery body 8 is arranged in the battery compartment.

[0042] Combination Figure 6As shown, mounting seats 9 are installed on the inner walls around the battery compartment, and each mounting seat 9 abuts against the side wall of the lithium battery body 8.

[0043] As described above, when using the lithium battery body 8 provided by the utility model, a battery compartment for placing the lithium battery body 8 is formed between the upper shell 1 and the lower shell 3 through multiple mounting seats 9, thereby facilitating the detachable installation of the lithium battery body 8 between the upper shell 1 and the lower shell 3.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A shell sealing structure of a lithium battery, characterized in that: include: An upper shell (1) and a lower shell (3) are covered, a sealing gap is formed between the upper shell (1) and the lower shell (3), a protective cover (2), a waterproof component and a plurality of locking mechanisms are arranged in the sealing gap from top to bottom, the waterproof component is used to waterproof the sealing gap, the plurality of locking mechanisms are used to lock the upper shell (1) on the lower shell (3), the protective cover (2) is arranged outside the waterproof component and the locking mechanism, and the protective cover (2) is used to switch the sealing gap from horizontal to vertical downward.

2. The lithium battery housing sealing structure according to claim 1, characterized in that: The waterproof component comprises a mounting ring seat (5) and a waterproof gasket (10); the mounting ring seat (5) is an annular structure, and the mounting ring seat (5) is mounted on the outside of the top of the lower shell (3); the edge of the protective cover (2) is arranged outside the mounting ring seat (5); the waterproof gasket (10) is arranged between the protective cover (2) and the mounting ring seat (5); and a plurality of locking mechanisms are arranged at the bottom of the mounting ring seat (5).

3. The lithium battery housing sealing structure according to claim 2, characterized in that: An installation space is formed between the bottom of the installation ring seat (5) and the protective cover (2), and a sealing component is provided in the installation space, and the sealing component is used to seal the plurality of locking mechanisms.

4. The lithium battery housing sealing structure according to claim 3, characterized in that: The sealing component comprises a waterproof gel (13), and the waterproof gel (13) is filled in the installation space.

5. The lithium battery housing sealing structure according to claim 2, characterized in that: A ring groove (7) is provided at the top of the mounting ring seat (5) along the edge thereof, and the waterproof gasket (10) is embedded and mounted in the ring groove (7).

6. The lithium battery housing sealing structure according to claim 2, characterized in that: The locking mechanism comprises a bolt column (4) and a nut (11) threaded on the bottom end of the bolt column (4); the top of the bolt column (4) is welded to the top of the inside of the protective cover (2); the mounting ring seat (5) is provided with a recessed hole (6) from bottom to top for accommodating the bolt column (4); the nut (11) is arranged in the recessed hole (6).

7. The lithium battery housing sealing structure according to claim 6, characterized in that: A plug (12) is also provided at the bottom of the recessed hole (6) for protecting the nut (11); one end of the plug (12) is inserted into the recessed hole (6); a skirt (14) is provided at the bottom edge of the plug (12); and a recessed groove (15) for accommodating the skirt (14) is provided at the bottom of the recessed hole (6).

8. The lithium battery housing sealing structure according to claim 1, characterized in that: The protective cover (2) comprises two parts, a cover top and a cover wall. The cover top and the cover wall are both annular structures. The inner ring of the cover top is welded to the outer wall of the bottom of the upper shell (1), and the top end of the cover wall is welded to the bottom of the edge of the cover top.

9. A lithium battery, characterized in that: It comprises a battery shell sealing structure as claimed in any one of claims 1 to 8, wherein a battery compartment is formed between the upper shell (1) and the lower shell (3), and a lithium battery body (8) is arranged in the battery compartment.

10. The lithium battery according to claim 9, characterized in that: Mounting seats (9) are installed on the inner walls around the battery compartment, and each mounting seat (9) abuts against the side wall of the lithium battery body (8).

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