Cylindrical lithium battery cap assembly

Abstract

The utility model relates to the technical field of lithium battery caps, in particular to a cylindrical lithium battery cap assembly which comprises a battery body, an outer protection body is fixedly connected to the top of the battery body, a first fixing block is fixedly connected to an inner cavity of the outer protection body, a first through hole is formed in the central axis of the first fixing block, and a second through hole is formed in the central axis of the first fixing block. An inner cavity of the first through hole is slidably connected with a first sliding rod, and the top of the first sliding rod is fixedly connected with a second fixing block. The explosion-proof lithium battery has the advantage of pressure relief and explosion prevention for the lithium battery, and in the actual use process, through the matched use of the first sliding rod, the second fixing block, the first spring, the connecting rod and the movable stop block, when excessive gas is generated in the battery body, the gas can be smoothly and safely released, so that the pressure accumulation is effectively avoided, and the safety of the battery is improved. And the safe operation of the battery body is ensured.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery cap technology, specifically a cylindrical lithium battery cap assembly. Background Technology

[0002] With the widespread application of lithium batteries in consumer electronics, energy storage devices, power tools, electric vehicles and other fields, lithium batteries may overheat, expand gas, or even cause leakage and explosion hazards during charging and discharging, especially under abnormal conditions such as overcharging, over-discharging or short circuit. The cap is not only used for sealing and protecting the battery, but also needs to have certain pressure relief and explosion-proof functions to deal with the accumulation of internal gas.

[0003] As disclosed in CN214957089U, a cylindrical lithium battery cap includes a top cover, an explosion-proof sheet, a perforated plate, and a sealing ring. The top cover, explosion-proof sheet, and perforated plate are electrically connected sequentially from top to bottom. The sealing ring includes a first groove, a supporting part, and a second groove. The explosion-proof sheet includes a bent part and a protruding part. The protruding part protrudes towards the side closest to the perforated plate. An explosion-proof line is provided at the connection between the bent part and the protruding part. The perforated plate includes a snap-fit ​​part and a settling part. The settling part has a through hole. The snap-fit ​​part is disposed in the first groove. The bent part and the snap-fit ​​part cooperate to form a first spot welding area on the side away from the first groove. The protruding part and the settling part cooperate to form a second spot welding area. The supporting part is disposed to cooperate with the end of the explosion-proof sheet. The second groove is used to accommodate the end of the explosion-proof sheet and the top cover, reducing the micro-deformation of the explosion-proof sheet, ensuring the stability of the explosion-proof sheet, and improving the explosion-proof effect.

[0004] The aforementioned patent addresses the issue of internal gas emission in batteries by relying on vents to release gas to the outside. However, relying solely on vents for gas emission has certain shortcomings. The presence of vents allows dust and impurities from the outside air to enter the battery through them. These impurities can contaminate the chemical substances or electrode materials inside the battery, affecting its performance and lifespan. Furthermore, the vent design cannot effectively prevent the external environment from affecting the internal pressure of the battery. Especially in harsh or dusty environments, dust accumulation or other contaminants entering the battery can lead to equipment malfunctions or safety hazards. Utility Model Content

[0005] The purpose of this invention is to provide a cylindrical lithium battery cap assembly that has the advantages of preventing lithium battery pressure relief and explosion, and solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cylindrical lithium battery cap assembly, comprising a battery body, an outer protective body fixedly connected to the top of the battery body, a first fixing block fixedly connected to the inner cavity of the outer protective body, a first through hole opened on the central axis of the first fixing block, a first sliding rod slidably connected to the inner cavity of the first through hole, a second fixing block fixedly connected to the top of the first sliding rod, a plurality of first springs fixedly connected to the bottom of the second fixing block, and the other ends of the plurality of first springs fixedly connected to the first fixing block, a connecting rod fixedly connected to the top of the second fixing block, a top cover fixedly connected to the top of the outer protective body, and an explosion-proof sheet fixedly connected to the bottom of the top cover, and the explosion-proof sheet... The explosion-proof disc is fixedly connected to the upper end of the inner cavity of the outer protective body. The top cover and the central axis of the explosion-proof disc share a second through hole, and the connecting rod is slidably connected to the inner cavity of the second through hole. A protective shell is fixedly connected to the top of the top cover, and the upper end of the connecting rod extends into the inner cavity of the protective shell. A sliding block is fixedly connected to the top of the connecting rod. Two third fixing blocks are fixedly connected to both sides of the top of the sliding block. A first fixing rod is fixedly connected to one side of the two third fixing blocks opposite to each other. A moving rod is rotatably connected to the surface of the first fixing rod. A second fixing rod is rotatably connected to the other end of the moving rod. A fourth fixing block is fixedly connected to both ends of the second fixing rod. A moving stop is fixedly connected to one side of the two fourth fixing blocks.

[0007] Furthermore, as a preferred embodiment of this utility model, both sides of the protective shell are provided with a first sliding groove adapted to the moving block.

[0008] Furthermore, as a preferred embodiment of this utility model, guide blocks are fixedly connected to one side of each of the two fourth fixing blocks, guide grooves are provided on both sides of the inner cavity of the first sliding groove, and the guide blocks are slidably connected to the inner cavity of the guide grooves.

[0009] Furthermore, as a preferred embodiment of this utility model, a second sliding groove is provided at the lower end of the inner cavity of the outer protective body. A second spring is fixedly connected to the inner cavity of the second sliding groove. A sliding block is fixedly connected to one side of the second spring. A second sliding rod is fixedly connected to the other side of the sliding block. A locking block is fixedly connected to the other end of the second sliding rod. Both the sliding block and the second sliding rod are slidably connected to the inner cavity of the second sliding groove.

[0010] Furthermore, as a preferred embodiment of this utility model, a circular groove is formed on the upper surface of the battery body, the locking block is fixedly connected to the inner cavity of the circular groove, and the battery body is fixedly connected to the bottom of the first fixing block.

[0011] Beneficial Effects: The technical solution of this application has the following advantages: This utility model has the advantage of pressure relief and explosion prevention for lithium batteries. In actual use, through the coordinated use of the first sliding rod, the second fixed block, the first spring, the connecting rod, and the moving stop, when too much gas is generated inside the battery body, the gas can be released smoothly and safely, thereby effectively avoiding pressure accumulation and ensuring the safe operation of the battery body. The explosion-proof function of the explosion-proof sheet further enhances safety, preventing dangers such as explosions caused by excessive pressure. The elastic recovery function of the first spring allows the device to quickly return to its original state after gas release, ensuring that the device can withstand frequent... Maintaining long-term stability and reliability during operation enhances the safety of the battery body and extends its service life. Through the coordinated use of the second spring, sliding block, second sliding rod, and locking block, a quick and secure locking function is achieved, enabling precise docking with the battery body in a short time. A circular groove is provided on the upper surface of the battery body, and the locking block can precisely engage with the circular groove, allowing the battery body to be easily placed into the inner cavity of the outer protective body. The tight fit between the locking block and the circular groove ensures that the battery body will not loosen or shift during use, thus ensuring the reliability and safety of the battery body during long-term use.

[0012] It should be understood that all combinations of the foregoing concepts and the additional concepts described in more detail below can be considered as part of the utility model subject matter of this disclosure, provided that such concepts do not contradict each other. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the cap of the device of this utility model;

[0016] Figure 3 This is a schematic diagram of the top venting structure of the device of this utility model;

[0017] Figure 4 This is a schematic diagram of the battery mounting structure at the bottom of the device of this utility model;

[0018] Figure 5 This utility model Figure 4 A magnified view of part A in the image.

[0019] In the figure, the meanings of the various reference numerals are as follows: 1. Battery body; 2. Outer protective body; 3. First fixing block; 4. First sliding rod; 5. Second fixing block; 6. First spring; 7. Connecting rod; 8. Top cover; 9. Explosion-proof sheet; 10. Protective shell; 11. Sliding block; 12. Third fixing block; 13. First fixing rod; 14. Moving rod; 15. Second fixing rod; 16. Fourth fixing block; 17. Moving stop; 18. Guide block; 19. Second spring; 20. Sliding round block; 21. Second sliding rod; 22. Locking block. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. To better understand the technical content of the present utility model, specific embodiments are provided and described in conjunction with the accompanying drawings. Various aspects of the present utility model are described in this disclosure with reference to the accompanying drawings, which show many illustrative embodiments. It should be understood that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of many ways. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] As attached Figure 1 To be continued Figure 5 As shown: This embodiment provides a cylindrical lithium battery cap assembly, including a battery body 1. An outer protective body 2 is fixedly connected to the top of the battery body 1. A first fixing block 3 is fixedly connected to the inner cavity of the outer protective body 2. A first through hole is opened on the central axis of the first fixing block 3. A first sliding rod 4 is slidably connected to the inner cavity of the first through hole. A second fixing block 5 is fixedly connected to the top of the first sliding rod 4. A plurality of first springs 6 are fixedly connected to the bottom of the second fixing block 5, and the other ends of the plurality of first springs 6 are fixedly connected to the first fixing block 3. A connecting rod 7 is fixedly connected to the top of the second fixing block 5. A top cover 8 is fixedly connected to the top of the outer protective body 2. An explosion-proof sheet 9 is fixedly connected to the bottom of the top cover 8, and the explosion-proof sheet 9 is fixedly connected to the inner cavity of the outer protective body 2. At the upper end, the top cover 8 and the explosion-proof sheet 9 share a second through hole along their central axis, and the connecting rod 7 is slidably connected to the inner cavity of the second through hole. A protective shell 10 is fixedly connected to the top of the top cover 8, and the upper end of the connecting rod 7 extends into the inner cavity of the protective shell 10. A sliding block 11 is fixedly connected to the top of the connecting rod 7. Two third fixing blocks 12 are fixedly connected to both sides of the top of the sliding block 11. A first fixing rod 13 is fixedly connected to one side of the two third fixing blocks 12. A moving rod 14 is rotatably connected to the surface of the first fixing rod 13. A second fixing rod 15 is rotatably connected to the other end of the moving rod 14. A fourth fixing block 16 is fixedly connected to both ends of the second fixing rod 15. A moving stop 17 is fixedly connected to one side of both fourth fixing blocks 16.

[0022] Specifically, the protective shell 10 has a first sliding groove on both sides that is adapted to the moving block 17.

[0023] In this embodiment: by setting the first sliding groove, the moving block 17 can slide in its inner cavity. When gas is generated inside the battery body 1, the expansion of the gas will push the moving block 17 to move along the first sliding groove, so that the gas can be discharged smoothly from the battery. This can ensure the discharge of gas inside the battery body 1 and improve the safety of the battery body 1.

[0024] Specifically, guide blocks 18 are fixedly connected to one side of each of the two fourth fixed blocks 16, and guide grooves are provided on both sides of the inner cavity of the first sliding groove, with the guide blocks 18 slidably connected to the inner cavity of the guide grooves.

[0025] In this embodiment, the cooperation between the guide block 18 and the guide groove ensures that the moving block 17 moves smoothly along the trajectory. At the same time, the guide block 18 and the guide groove together play a limiting role, effectively preventing the moving block 17 from detaching from the device during the outward movement, thus ensuring the stable movement of the moving block 17 and preventing structural damage due to excessive displacement.

[0026] Specifically, a second sliding groove is provided at the lower end of the inner cavity of the outer protective body 2. A second spring 19 is fixedly connected to the inner cavity of the second sliding groove. A sliding block 20 is fixedly connected to one side of the second spring 19. A second sliding rod 21 is fixedly connected to the other side of the sliding block 20. A locking block 22 is fixedly connected to the other end of the second sliding rod 21. Both the sliding block 20 and the second sliding rod 21 are slidably connected to the inner cavity of the second sliding groove.

[0027] In this embodiment, the second spring 19, the sliding block 20, the second sliding rod 21 and the locking block 22 work together to achieve a fast and secure locking function, which can quickly dock with the battery body 1 in a short time, thereby improving the stability of the device.

[0028] Specifically, a circular groove is provided on the upper surface of the battery body 1, the locking block 22 is fixedly connected to the inner cavity of the circular groove, and the battery body 1 is fixedly connected to the bottom of the first fixing block 3.

[0029] In this embodiment: by setting the circular groove, the locking block 22 can be precisely engaged with the circular groove, so that the battery can be easily placed into the inner cavity of the outer protective body 2. The engagement between the locking block 22 and the circular groove ensures that the battery body 1 will not loosen or shift during use, thus improving the assembly efficiency.

[0030] The working principle and usage of this utility model are as follows: The user places the battery body 1 into the bottom of the inner cavity of the outer protective body 2. The outer protective body 2 protects the battery body 1. A second sliding groove is provided at the bottom of the inner cavity of the outer protective body 2. A second spring 19 is fixedly connected to the inner cavity of the second sliding groove. A sliding block 20 is fixedly connected to one end of the second spring 19, and a second sliding rod 21 is fixedly connected to the other side of the sliding block 20. The other end of the second sliding rod 21 is fixedly connected to the locking block 22. Both the sliding block 20 and the second sliding rod 21 are slidably connected to the inner cavity of the second sliding groove. A circular groove is provided on the upper surface of the battery body 1. Under the action of the locking block 22 and the second spring 19, the battery body 1 can be easily inserted into the outer protective body. At the bottom of the inner cavity of the outer protective body 2, the top of the battery body 1 is fixedly connected to the bottom of the first fixing block 3. Under the elastic restoring force of the second spring 19 and the blocking action of the first fixing block 3, the battery body 1 will not detach from the inner cavity of the outer protective body 2. When the internal pressure of the battery body 1 is too high and needs to be released, the gas will enter the first through hole opened on the central axis of the first fixing block 3. Several first springs 6 are fixedly connected to the top of the first fixing block 3. The elastic force of the first springs 6 makes the gas easily squeeze and lift the first sliding rod 4 upward, causing the first sliding rod 4 to detach from the first through hole. At this time, the gas will pass through the second through hole opened by the top cover 8 and the explosion-proof plate 9 and enter the inner cavity of the protective shell 10. The top of the first sliding rod 4 is fixed to the second fixing block 5. The top of the second fixed block 5 is fixedly connected to the connecting rod 7, and the top of the connecting rod 7 is fixedly connected to the sliding block 11. Two third fixed blocks 12 are fixedly connected to both sides of the sliding block 11. A first fixed rod 13 is fixedly connected to one side of each of the two third fixed blocks 12. A moving rod 14 is rotatably connected to the surface of the first fixed rod 13. A second fixed rod 15 is rotatably connected to the other end of the moving rod 14. Both ends of the second fixed rod 15 are fixedly connected to fourth fixed blocks 16. A moving stop 17 is fixedly connected to one side of each of the two fourth fixed blocks 16. When the first sliding rod 4 rises, it drives the second fixed block 5 to move. The connecting rod 7 at the top of the second fixed block 5 moves into the inner cavity of the protective shell 10. At this time, the sliding block 11, the third fixed block 12, and the connecting rod 7 are fixedly connected to the connecting rod 7. Under the action of the fixed block 12, the first fixed rod 13, and the moving rod 14, and with the first sliding grooves on both sides of the protective shell 10 adapted to the moving stop 17, the rising of the first sliding rod 4 ultimately pushes the moving stop 17 to move outward of the device. At this time, a gap is created between the moving stop 17 and the protective shell 10, thereby allowing the gas to be released. Guide blocks 18 are fixedly connected to both sides of the two fourth fixed blocks 16. Guide grooves are opened on both sides of the first sliding groove, and the guide blocks 18 are slidably connected to the inner cavity of the guide grooves. The guide blocks 18 play a guiding and limiting role, which not only allows the moving stop 17 to move along the trajectory of the guide grooves, but also prevents the moving stop 17 from detaching from the device, increasing reliability. After the gas is discharged,Under the elastic restoring force of several first springs 6 fixed to the top of the first fixed block 3, the connecting rod 7 moves downward, ultimately causing the moving stop 17 to re-enter the device, thus increasing safety.

[0031] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0032] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A cylindrical lithium battery cap assembly, comprising a battery body (1), characterized in that: The top of the battery body (1) is fixedly connected to an outer protective body (2). The inner cavity of the outer protective body (2) is fixedly connected to a first fixing block (3). The central axis of the first fixing block (3) is provided with a first through hole. The inner cavity of the first through hole is slidably connected to a first sliding rod (4). The top of the first sliding rod (4) is fixedly connected to a second fixing block (5). The bottom of the second fixing block (5) is fixedly connected to several first springs (6), and the other end of several first springs (6) is fixedly connected to the first fixing block (3). The top of the second fixing block (5) is fixedly connected to a connecting rod (7). The top of the outer protective body (2) is fixedly connected to a top cover (8). The bottom of the top cover (8) is fixedly connected to an explosion-proof sheet (9), and the explosion-proof sheet (9) is fixedly connected to the upper end of the inner cavity of the outer protective body (2). The top cover (8) and the explosion-proof sheet (9) are connected to each other. The central axis of the top cover (8) is provided with a second through hole, and the connecting rod (7) is slidably connected to the inner cavity of the second through hole. The top of the top cover (8) is fixedly connected to a protective shell (10), and the upper end of the connecting rod (7) extends to the inner cavity of the protective shell (10). The top of the connecting rod (7) is fixedly connected to a sliding block (11). Two third fixing blocks (12) are fixedly connected to both sides of the top of the sliding block (11). A first fixing rod (13) is fixedly connected to one side of the two third fixing blocks (12). A moving rod (14) is rotatably connected to the surface of the first fixing rod (13). A second fixing rod (15) is rotatably connected to the other end of the moving rod (14). A fourth fixing block (16) is fixedly connected to both ends of the second fixing rod (15). A moving stop block (17) is fixedly connected to one side of the two fourth fixing blocks (16).

2. The cylindrical lithium battery cap assembly according to claim 1, characterized in that: Both sides of the protective shell (10) are provided with a first sliding groove that is adapted to the moving block (17).

3. The cylindrical lithium battery cap assembly according to claim 1, characterized in that: Guide blocks (18) are fixedly connected to one side of each of the two fourth fixed blocks (16). Guide grooves are provided on both sides of the inner cavity of the first sliding groove, and the guide blocks (18) are slidably connected to the inner cavity of the guide grooves.

4. A cylindrical lithium battery cap assembly according to claim 1, characterized in that: The lower end of the inner cavity of the outer protective body (2) is provided with a second sliding groove. A second spring (19) is fixedly connected to the inner cavity of the second sliding groove. A sliding block (20) is fixedly connected to one side of the second spring (19). A second sliding rod (21) is fixedly connected to the other side of the sliding block (20). A locking block (22) is fixedly connected to the other end of the second sliding rod (21). The sliding block (20) and the second sliding rod (21) are both slidably connected to the inner cavity of the second sliding groove.

5. A cylindrical lithium battery cap assembly according to claim 4, characterized in that: A circular groove is provided on the upper surface of the battery body (1), the locking block (22) is fixedly connected to the inner cavity of the circular groove, and the battery body (1) is fixedly connected to the bottom of the first fixing block (3).

Images