Columnar lithium battery integrated cap structure

Abstract

The utility model relates to the technical field of cap structures, in particular to an integrated cap structure of a columnar lithium battery. The columnar lithium battery integrated cap structure comprises a columnar lithium battery body, an outer ring, a threaded disc, a clamping rod, a spring, a sliding rod and a screw, the columnar lithium battery body serves as a carrier of a whole system, the threaded disc with internal threads is arranged at the top end of the columnar lithium battery body, the outer ring serves as a foundation of the whole cap structure, an electronic element is installed in the outer ring, and the clamping rod is arranged on the outer ring. The inner side face of the outer ring is provided with external threads, and the outer ring is in threaded connection with the threaded disc. The nut cap structure can be conveniently and rapidly detached through the thread matching design between the thread disc and the outer ring, great convenience is provided for operators, meanwhile, the clamping rod is embedded into the clamping groove in the thread disc to lock and fix the outer ring, extremely high mechanical stability is ensured, the nut cap can be tightly connected even in the vibration or impact environment, and the service life of the nut cap is prolonged. And loosening is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to cap structure technical field especially relates to a cylindrical lithium battery integrated cap structure. BACKGROUND

[0002] Cylindrical lithium batteries are favored due to their high energy density, long life, and wide range of applications, and are widely used in portable electronic devices, electric vehicles, energy storage systems, and other fields. However, as the application range continues to expand, higher requirements are placed on the safety, reliability, and maintenance convenience of the battery.

[0003] Many traditional cap structures are connected using welding or other fixing methods. While this design can provide high mechanical strength, it is extremely inconvenient to disassemble for internal inspection or replacement, increasing maintenance costs and time. Other traditional cap structures use simple threaded connections or buckle fixes. While these designs are convenient for disassembly, they are prone to loosening or falling off in a vibrating or impact environment, leading to sealing failure and affecting the performance and safety of the battery. SUMMARY

[0004] To overcome the above-mentioned shortcomings, the technical problem of the utility model is to provide a cylindrical lithium battery integrated cap structure.

[0005] The technical solution of the utility model is: a cylindrical lithium battery integrated cap structure, including a cylindrical lithium battery body, an outer ring, a threaded disc, a clamping rod, a spring, a sliding rod, and a screw, the cylindrical lithium battery body serves as the carrier of the entire system, and its top end is provided with a threaded disc with internal threads, the outer ring is the basis of the entire cap structure, electronic components are installed inside the outer ring, the inner side of the outer ring has external threads, the outer ring is threadedly connected with the threaded disc, three sliding grooves are equidistantly formed in the circumference of the inner ring, sliding rods are slidably connected in the sliding grooves, clamping rods are connected to the bottom of the sliding rods, springs are connected between the sliding rods and the sliding grooves, three clamping grooves are equidistantly formed in the circumference of the threaded disc, the clamping rods are clamped with the corresponding clamping grooves, and the top end of the sliding groove is threadedly connected with a screw, the screw abuts against the sliding rod, and the spring is in a stretched state.

[0006] Optionally, the inner part of the outer ring includes a gasket, a CID, an explosion-proof aluminum sheet, and a top cover, the gasket is placed above the threaded disc, the CID is installed inside the outer ring above the gasket, the explosion-proof aluminum sheet is installed above the CID as part of the safety valve, and the top cover is located at the top of the cap structure and directly connected with the outer ring.

[0007] Optionally, the gasket is made of silicone rubber material.

[0008] Optionally, it further includes a sealing ring for improving the sealing performance, the sealing ring is arranged on the outer side of the outer ring and tightly adheres to the end face of the cylindrical lithium battery body.

[0009] Optionally, a sealing sheet is further included between the top cover and the outer ring.

[0010] Optionally, the material of the sliding rod and the clamping rod is phosphor bronze, and the surface thereof is polished.

[0011] Compared with the prior art, the utility model has the following advantages: 1, the thread cooperation design between the thread disc and the outer ring makes the cap structure can be conveniently and quickly removed, provides great convenience for the operator, simultaneously, the clamping rod is locked and fixed to the outer ring through the clamping groove on the thread disc, ensures the very high mechanical stability, even in the vibration or impact environment, the cap can keep close connection and will not be loose.

[0012] 2, through the multiple sealing measures of the gasket, the sealing ring and the sealing sheet, effectively prevent the electrolyte leakage and the outside moisture from invading, ensure the stability and safety of the battery internal environment, these sealing components jointly act, form a reliable barrier, protect the battery from the influence of the external environment.

[0013] 3, the CID (current interrupt device) can be deformed and disconnect the circuit automatically before the battery internal pressure reaches the dangerous level, effectively prevent the security risks caused by short circuit and overcharge. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the three-dimensional structure schematic diagram of the utility model.

[0015] Figure 2 It is the explosion drawing of the utility model.

[0016] Figure 3 It is the sectional view of the gasket, the CID and the explosion-proof aluminum sheet of the utility model.

[0017] Figure 4 It is the sectional view of the outer ring, the sealing ring and the sealing sheet components of the utility model.

[0018] Drawing reference: 1, cylindrical lithium battery body, 2, gasket, 3, CID, 4, explosion-proof aluminum sheet, 5, top cover, 6, outer ring, 7, thread disc, 8, sealing ring, 9, sealing sheet, 10, clamping rod, 11, spring, 12, sliding rod, 13, screw. DETAILED DESCRIPTION

[0019] The technical scheme of the utility model will be further explained in connection with the drawings.

[0020] Embodiment: a cylindrical lithium battery integrated cap structure, like Figures 1-4As shown, including the cylindrical lithium battery body 1, the outer ring 6, the threaded disc 7, the clamping rod 10, the spring 11, the sliding rod 12 and the screw 13, the cylindrical lithium battery body 1 as the carrier of the whole system, the top end is provided with a threaded disc 7 with internal threads, the outer ring 6 is the basis of the whole cap structure, the electronic components are installed in the outer ring 6, the inner side of the outer ring 6 has external threads, the outer ring 6 is threadedly connected with the threaded disc 7, realizing the close combination of the cap structure and the cylindrical lithium battery body 1, and the internal components can be pressed on the top of the cylindrical lithium battery body 1 when tightened, ensuring the sealing performance and mechanical stability, three sliding grooves are equidistantly formed on the inner side of the outer ring 6, the sliding rods 12 are slidably connected in the sliding grooves, the clamping rods 10 are connected to the bottom of the sliding rods 12, the springs 11 are connected between the sliding rods 12 and the sliding grooves, three clamping grooves are equidistantly formed on the threaded disc 7, the clamping rods 10 are clamped with the corresponding clamping grooves, the screw 13 is threadedly connected with the top end of the sliding groove, the screw 13 abuts against the sliding rod 12, so that the spring 11 is in a stretched state, and thus the outer ring 6 cannot rotate, ensuring the tightness of the connection between the outer ring 6 and the cylindrical lithium battery body 1, the material of the sliding rod 12 and the clamping rod 10 is phosphor bronze, which has good elasticity and wear resistance, is suitable for frequent sliding operation, and the surface is polished to reduce friction and prolong the service life.

[0021] As shown in Figures 2-3 , the inner part of the outer ring 6 includes a gasket 2, a CID 3, an explosion-proof aluminum sheet 4 and a top cover 5, the gasket 2 is placed above the threaded disc 7, which not only enhances the sealing effect but also plays a buffering role, the gasket 2 is made of silicone rubber material, which can maintain good sealing performance in high temperature environment and has strong resistance to electrolyte, the CID 3 (current interrupt device) is installed inside the outer ring 6 and located above the gasket 2, before the pressure in the cylindrical lithium battery body 1 reaches the set safety threshold, the CID 3 (current interrupt device) will automatically deform and break the circuit, avoiding safety hazards caused by short circuit or overcharging, the explosion-proof aluminum sheet 4 is installed above the CID 3, which is part of the safety valve and breaks or opens when the pressure exceeds the preset value to release excess gas and prevent the cylindrical lithium battery body 1 from exploding, the top cover 5 is located at the top of the cap structure and is the external contact point of the positive electrode of the cylindrical lithium battery body 1, which is directly connected with the outer ring 6, providing electrical connection for the cylindrical lithium battery body 1 and enhancing the overall mechanical strength.

[0022] As shown in Figure 1 , Figure 2 and Figure 4 , it also includes a sealing sheet 9 and a sealing ring 8 for improving the sealing performance, the sealing ring 8 is arranged on the outer side of the outer ring 6 and tightly contacts with the end face of the cylindrical lithium battery body 1, improving the sealing performance of the whole cap structure and effectively preventing electrolyte leakage and external moisture intrusion, the sealing sheet 9 is located between the top cover 5 and the outer ring 6, ensuring the sealing performance between them and further enhancing the protection ability of the cap structure.

[0023] When the cap structure is installed for the first time or reassembled, the outer ring 6 is screwed onto the threaded disc 7, and then the spring 11 is compressed by installing the screw 13 at the top of the sliding slot to press against the sliding rod 12, so that the clamping rod 10 is accurately inserted into the clamping slot of the threaded disc 7, thereby locking the outer ring 6 and ensuring that it is tightly combined with the cylindrical lithium battery body 1. When the cap structure needs to be removed, the screw 13 should be loosened first, allowing the spring 11 to return to its original position, driving the sliding rod 12 and the clamping rod 10 to move upward along the sliding slot. After the clamping rod 10 is disengaged from the clamping slot, the outer ring 6 can be easily rotated and removed.

[0024] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made in accordance with the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A cylindrical lithium battery integrated cap structure, characterized by comprising The cylindrical lithium battery body (1), the outer ring (6), the threaded disc (7), the clamping rod (10), the spring (11), the sliding rod (12) and the screw (13), the cylindrical lithium battery body (1) as the carrier of the whole system, the top end is provided with a threaded disc (7) with internal threads, the outer ring (6) is the basis of the whole cap structure, the electronic components are installed in the outer ring (6), the inner side of the outer ring (6) has external threads, the outer ring (6) is threadedly connected with the threaded disc (7), three sliding grooves are equidistantly formed in the outer ring (6), the sliding rod (12) is slidably connected in the sliding groove, the clamping rod (10) is connected to the bottom of the sliding rod (12), the spring (11) is connected between the sliding rod (12) and the sliding groove, three clamping grooves are equidistantly formed in the threaded disc (7), the clamping rod (10) is clamped with the corresponding clamping groove, the screw (13) is threadedly connected with the top end of the sliding groove, the screw (13) abuts against the sliding rod (12), so that the spring (11) is in a stretched state.

2. The cylindrical lithium battery integrated cap structure according to claim 1, characterized in that: The inner part of the outer ring (6) comprises a gasket (2), a CID (3), an explosion-proof aluminum sheet (4) and a top cover (5), the gasket (2) is placed above the threaded disc (7), the CID (3) is installed inside the outer ring (6) and above the gasket (2), the explosion-proof aluminum sheet (4) is installed above the CID (3) and serves as part of the safety valve, and the top cover (5) is located at the top of the cap structure and is directly connected with the outer ring (6).

3. The cylindrical lithium battery integrated cap structure according to claim 2, characterized in that: The gasket (2) is made of silicone rubber material.

4. The cylindrical lithium battery integrated cap structure according to claim 3, characterized in that: It also comprises a sealing ring (8) for improving the sealing performance, which is arranged on the outer side of the outer ring (6) and tightly contacts with the end surface of the cylindrical lithium battery body (1).

5. The cylindrical lithium battery integrated cap structure according to claim 4, characterized in that: It also comprises a sealing sheet (9) between the top cover (5) and the outer ring (6).

6. The cylindrical lithium battery integrated cap structure according to claim 5, characterized in that: The material of the sliding rod (12) and the clamping rod (10) is phosphor bronze, and the surface is polished.

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