Lithium battery cap structure

Abstract

The utility model discloses a lithium battery cap structure which comprises a protective shell, an end cover is movably arranged at the top end of the protective shell, a supporting ring is connected to the bottom of the end cover, a limiting ring is connected to the bottom of the supporting ring, a clamping groove is formed in the outer circle of the supporting ring, a plurality of clamping blocks are arranged on the inner wall of the protective shell, and a safety valve structure is arranged in an inner cavity of the end cover. Through cooperative use of the clamping block and the limiting ring, after the end cover covers the upper portion of the protective shell, the supporting ring is located in an inner cavity of the top end of the protective shell, the limiting ring is located above the clamping block, pressure is applied from the upper portion of the end cover, and when the pressure is larger than friction force between the clamping block and the edge of the limiting ring, the limiting ring can be pushed to the lower portion of the clamping block; the clamping block is clamped in the inner cavity of the clamping groove, the limiting ring is limited, at the moment, connection of the end cover and the protective shell can be completed, and the structure is simple, firm in connection, not prone to falling off and high in practicability.

Description

Technical Field

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

[0002] Lithium-ion batteries are secondary batteries that rely on the movement of lithium ions between the positive and negative electrodes to work. During the charge and discharge process, lithium ions are intercalated and deintercalated between the two electrodes: when charging, lithium ions are deintercalated from the positive electrode and intercalated into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge.

[0003] After searching, in the prior art, a utility model with publication number CN213340542U discloses a new structural sealing ring for an explosion-proof combined cap of a cylindrical lithium battery, including a battery shell, a top cover is fixedly provided at the top of the battery shell, a positioning magnetic ring is opened at the top of the top cover, and the positioning magnetic ring is magnetically connected to the fixed magnetic ring. The utility model is provided with a first cap, a second cap and a first sealing ring, a fixed magnetic ring is fixedly provided at the bottom end of the first sealing ring, slide rails are fixedly provided on both sides of the inner wall of the first sealing ring, and a first limiting ring and a second limiting ring are rotatably provided on both sides of the inner wall of the first sealing ring, a fixed shaft is fixedly provided on one side of the inner wall of the first limiting ring, and the outer wall of the fixed shaft contacts the inner wall of the slot, the slot is opened on one side of the plug block, and an insert ring is fixedly provided on one side of the inner wall of the second limiting ring. In this way, lithium battery assembly is facilitated, assembly time is effectively saved, battery production efficiency is improved, and the air tightness of the battery is increased.

[0004] And the prior art, a multifunctional lithium battery cap sealing structure with publication number CN213782112U.

[0005] The above-mentioned various technical solutions make the use of lithium battery caps better through different methods, but the above-mentioned methods still have the following shortcomings: the structures of the above-mentioned methods are relatively complex, the production cost of the battery is high, and it is not easy to promote and use; at the same time, the above-mentioned methods are not convenient for disassembly of the cap, or when disassembly, it is easy to damage the battery structure, and it is not convenient to recycle the battery shell or the cap, which affects the practicality. Utility Model Content

[0006] The purpose of the utility model is to provide a lithium battery cap structure to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solution: comprising a protective shell, the top of which is movably provided with an end cover, the bottom of which is connected with a support ring, the bottom of which is connected with a limiting ring, the outer ring of which is provided with a slot, the inner wall of the protective shell is provided with a plurality of blocks, and the inner cavity of the end cover is provided with a safety valve structure.

[0008] Preferably, the card block is movably connected to the card slot.

[0009] Preferably, the plurality of blocks are distributed in a ring shape on the inner wall of the protective shell.

[0010] Preferably, the edges of the clamping block and the limiting ring are rounded.

[0011] Preferably, a plurality of grooves are formed at the bottom of the outer ring of the end cover.

[0012] Preferably, a sealing groove is provided at the bottom end of the end cover, a sealing ring is provided in the inner cavity of the sealing groove, a sealing ring is fixedly provided at the top end of the protective shell, the sealing ring is movably connected to the sealing groove, and the sealing ring is made of rubber.

[0013] Preferably, the outer ring of the safety valve structure is provided with a plurality of exhaust grooves.

[0014] Preferably, a connecting groove is provided on the top of the end cover, and a cover plate is movably provided in the inner cavity of the connecting groove.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The lithium battery cap structure, through the coordinated use of the clamping block and the limiting ring, covers the end cover on the top of the protective shell. At this time, the support ring is in the top inner cavity of the protective shell, and the limiting ring is located above the clamping block. At this time, pressure is applied from the top of the end cover until the pressure is greater than the friction between the clamping block and the edge of the limiting ring. The limiting ring can be pushed to the bottom of the clamping block, so that the clamping block is clamped in the inner cavity of the clamping slot and the limiting ring is limited. At this time, the connection between the end cover and the protective shell can be completed. This method has a simple structure, a firm connection, is not easy to fall off, and is highly practical.

[0017] 2. The lithium battery cap structure is used in conjunction with a sealing groove, a sealing ring and a sealing ring. When the limit ring is clamped under the clamping block, the sealing ring is clamped in the inner cavity of the sealing groove to seal the connection gap between the protective shell and the end cover. The sealing ring is used to further improve the sealing of the device, thereby making the use of the device safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model.

[0019] Figure 2 This is a schematic diagram of the disassembly of the structure of the utility model.

[0020] Figure 3 It is a complete schematic diagram of the end cover of the utility model structure.

[0021] In the figure: 1. protective shell; 2. end cover; 3. safety valve structure; 4. exhaust groove; 5. connecting groove; 6. cover plate; 7. support ring; 8. limit ring; 9. clamping groove; 10. clamping block; 11. sealing groove; 12. sealing ring; 13. groove; 14. sealing ring. DETAILED DESCRIPTION

[0022] 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.

[0023] Example: See Figure 1-3 The utility model provides a technical solution: a lithium battery cap structure, including a protective shell 1, an end cover 2 is movably arranged on the top of the protective shell 1, a support ring 7 is connected to the bottom of the end cover 2, a limit ring 8 is connected to the bottom of the support ring 7, a card slot 9 is provided on the outer ring of the support ring 7, a plurality of card blocks 10 are arranged on the inner wall of the protective shell 1, and a safety valve structure 3 is arranged in the inner cavity of the end cover 2. The protective shell 1 is made of metal. Figure 2 As shown, the outer diameter of the support ring 7 is equal to the inner diameter of the protective shell 1. When the end cover 2 covers the top of the protective shell 1, the support ring 7 is clamped in the inner cavity of the protective shell 1. The protective shell 1 can prevent the support ring 7 from being deformed by external forces to ensure that the support ring 7 can be removed later; the support ring 7 can provide a certain supporting force at the end of the protective shell 1 to prevent the end of the protective shell 1 from being concave, thereby ensuring that the protective shell 1 can be recycled.

[0024] The card block 10 is movably connected to the card slot 9. Figure 2 , 3 , the block 10 is fixedly arranged on the inner wall of the protective shell 1; the setting diameter of the limiting ring 8 is smaller than the setting diameter of the supporting ring 7. When in use, the end cover 2 is placed on the top of the protective shell 1, and then the end cover 2 is pressed down by external force until the block 10 is engaged with the inner cavity of the card slot 9. At this time, the limiting ring 8 is located below the block 10, which is used to limit the position of the block 10, thereby completing the fixed connection between the end cover 2 and the protective shell 1. This method has a simple structure, a firm connection, is not easy to fall off, and has high practicality.

[0025] Among them, a plurality of blocks 10 are distributed in a ring shape on the inner wall of the protective shell 1. Figure 2 As shown, a plurality of clamping blocks 10 are fixedly arranged and evenly distributed on the inner wall of the protective shell 1. When the clamping blocks 10 are clamped in the inner cavity of the clamping slot 9, they can provide all-round gripping for the limiting ring 8, thereby making the connection between the end cover 2 and the protective shell 1 more stable.

[0026] The edges of the clamping block 10 and the limiting ring 8 are both rounded. Figure 3 As shown, the device sets the edges of the block 10 and the limiting ring 8 as rounded corners, and the overlap of the rounded corners of the block 10 and the limiting ring 8 is 1 / 2. After the rounded corners are processed, the friction between the edges of the block 10 and the limiting ring 8 can be reduced. When the end cover 2 is pressed down, the limiting ring 8 can pass through the edge of the block 10 through the rounded corners, so that the limiting ring 8 can be under the block 10, thereby limiting the block 10.

[0027] In this embodiment, after the end cover 2 is covered on the top of the protective shell 1, the support ring 7 is in the top inner cavity of the protective shell 1, and the limiting ring 8 is located above the clamping block 10. At this time, pressure is applied from the top of the end cover 2 until the pressure is greater than the friction between the clamping block 10 and the edge of the limiting ring 8. The limiting ring 8 can be pushed to the bottom of the clamping block 10, so that the clamping block 10 is clamped in the inner cavity of the clamping slot 9 and the limiting ring 8 is limited. At this time, the connection between the end cover 2 and the protective shell 1 can be completed. After the device is assembled, the surface of the protective shell 1 is covered with a heat shrink film to reinforce the connection between the end cover 2 and the protective shell 1.

[0028] A plurality of grooves 13 are formed at the bottom of the outer ring of the end cover 2 .

[0029] In this embodiment, in the natural state, the clamping block 10 can ensure that the limit ring 8 can be limited. When the device needs to be disassembled and recycled, the position of the protective shell 1 is first fixed by a clamping device, and then the external mechanical claw is clamped in the inner cavity of the groove 13. At this time, the end cover 2 can be pulled up through the groove 13. At this time, the limit ring 8 is retracted to the top of the clamping block 10 through the rounded corners, so that the end cover 2 is disconnected from the protective shell 1, so that the device structure can be recycled and used, making the device more environmentally friendly and practical.

[0030] Among them, a sealing groove 11 is opened at the bottom of the end cover 2, and a sealing ring 12 is arranged in the inner cavity of the sealing groove 11. A sealing ring 14 is fixedly arranged at the top of the protective shell 1. The sealing ring 14 is movably connected to the sealing groove 11, and the sealing ring 12 is made of rubber.

[0031] In this embodiment, refer to Figure 2 , 3 The sealing groove 11 is consistent in size with the sealing ring 14. When the limiting ring 8 is clamped under the clamping block 10, the sealing ring 14 is clamped in the inner cavity of the sealing groove 11 to seal the connection gap between the protective shell 1 and the end cover 2, thereby improving the sealing of the device to prevent leakage of the electrolyte.

[0032] Battery fluid leakage may cause environmental pollution or even lead to battery fire. To avoid the above situation, the device is further provided with a rubber sealing ring 12 in the inner cavity of the sealing groove 11 to further improve the sealing performance of the device, thereby making the use of the device safer and more reliable.

[0033] The outer ring of the safety valve structure 3 is provided with a plurality of exhaust grooves 4 .

[0034] In this embodiment, when the internal gas pressure of the device is high, the safety valve structure 3 will automatically open, so that the gas is discharged from the device through the exhaust groove 4 to prevent the battery from exploding due to excessive pressure.

[0035] A connecting groove 5 is provided on the top of the end cover 2 , and a cover plate 6 is movably provided in the inner cavity of the connecting groove 5 .

[0036] In this embodiment, the cover plate 6 plays a protective role to prevent the exhaust slot 4 from being blocked by external dust.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] 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 lithium battery cap structure, comprising a protective shell (1), characterized in that: The top of the protective shell (1) is movably provided with an end cover (2), the bottom of the end cover (2) is connected to a support ring (7), the bottom of the support ring (7) is connected to a limit ring (8), the outer ring of the support ring (7) is provided with a clamping groove (9), the inner wall of the protective shell (1) is provided with a plurality of clamping blocks (10), and the inner cavity of the end cover (2) is provided with a safety valve structure (3).

2. A lithium battery cap structure according to claim 1, characterized in that: The card block (10) is movably connected to the card slot (9).

3. A lithium battery cap structure according to claim 1, characterized in that: The multiple blocks (10) are distributed in a ring shape on the inner wall of the protective shell (1).

4. A lithium battery cap structure according to claim 1, characterized in that: The edges of the clamping block (10) and the limiting ring (8) are both rounded.

5. A lithium battery cap structure according to claim 1, characterized in that: A plurality of grooves (13) are formed at the bottom of the outer ring of the end cover (2).

6. A lithium battery cap structure according to claim 1, characterized in that: A sealing groove (11) is provided at the bottom end of the end cover (2), a sealing ring (12) is provided in the inner cavity of the sealing groove (11), a sealing ring (14) is fixedly provided at the top end of the protective shell (1), the sealing ring (14) is movably connected to the sealing groove (11), and the sealing ring (12) is made of rubber.

7. A lithium battery cap structure according to claim 1, characterized in that: The outer ring of the safety valve structure (3) is provided with a plurality of exhaust grooves (4).

8. A lithium battery cap structure according to claim 1, characterized in that: A connecting groove (5) is provided on the top of the end cover (2), and a cover plate (6) is movably provided in the inner cavity of the connecting groove (5).

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