Detachable lithium battery tab connection structure

Abstract

The utility model relates to lithium battery pole lug technical field, and disclose detachable lithium battery pole lug connecting structure, including lithium battery, the top of lithium battery is fixed with positive plate and negative plate, the top of positive plate and negative plate all is provided with the pole lug, one side of pole lug is provided with the locating frame, the inside of locating frame is provided with mounting mechanism, the utility model discloses through setting mounting mechanism, can after pole lug damage, through the rotation of screwing block, screwing block will drive threaded rod to rotate around bearing, while the rotation of threaded rod, its surface external thread will extrude the internal thread of thread hole, make transmission block move upwards, transmission block then will drive the pressing plate to move upwards, after can remove pole lug, replace new pole lug, reverse rotation screwing block, contrary to above step, finally the pressing plate will press the pole lug, complete the replacement of pole lug, and this mode avoids the process of welding, makes pole lug convenient to disassemble and replace.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery tab technology, specifically a detachable lithium battery tab connection structure. Background Technology

[0002] Tabs are raw materials for lithium-ion polymer battery products, such as mobile phone batteries, Bluetooth batteries, laptop batteries, and lithium batteries used in our daily lives.

[0003] A search revealed a Chinese patent document [Announcement No.: CN207398251U] disclosing a tab connection structure for a soft-pack lithium battery. This structure includes multiple soft-pack lithium batteries and a PCB connection board. The PCB connection board has tab through-holes corresponding to the positive and negative tabs, and solder pads corresponding to and positioned close to each tab through-hole. The solder pads are plated with a 0.15–0.4 mm thick aluminum-nickel composite layer. The positive and negative tabs pass through the tab through-holes, are bent, and soldered to the solder pads. The solder pads are connected via printed circuits on the PCB connection board to achieve series and parallel connection of multiple soft-pack lithium batteries. This tab connection structure allows the tabs to be resistively welded to the solder pads after passing through the tab through-holes, ensuring reliable welding, preventing detachment, and reducing equipment costs. The solder pads are connected via printed circuits on the PCB connection board, allowing for the prefabrication of PCB connection boards with different printed circuits to meet different series and parallel connection requirements, resulting in reliable circuit connections and low cost.

[0004] Lithium batteries typically have two tabs, usually welded to the positive and negative terminals. However, once the tabs are damaged, they are difficult to remove and replace without tools. To address this issue, we propose a detachable lithium battery tab connection structure. Utility Model Content

[0005] The purpose of this invention is to provide a detachable lithium battery tab connection structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a detachable lithium battery tab connection structure, including a lithium battery, wherein a positive electrode and a negative electrode are fixedly disposed on the top of the lithium battery, and tabs are disposed on the top of both the positive electrode and the negative electrode, a positioning frame is disposed on one side of the tabs, and an installation mechanism is disposed inside the positioning frame; The installation mechanism includes a screwing block disposed on the top of the positioning frame. A threaded rod is fixedly connected to the bottom of the screwing block. The bottom of the threaded rod extends through to the bottom of the positioning frame. A transmission block is connected to the surface of the threaded rod. A pressure plate is fixedly connected to one side of the transmission block. A threaded hole for cooperating with the threaded rod is opened on the top of the transmission block. An anti-loosening mechanism is fixedly installed on the installation mechanism.

[0007] Preferably, the anti-loosening mechanism includes a housing fixedly connected to one side of the positioning frame, a movable block slidably connected to the inner wall of the housing, a linkage block fixedly connected to the top of the movable block, a pin fixedly connected to one side of the linkage block, a plurality of pin holes for cooperating with the pins being opened on the circumferential side of the screwing block, and pressing blocks fixedly connected to both sides of the linkage block.

[0008] Preferably, a spring is fixedly connected to one side of the movable block, and one end of the spring is fixedly connected to the inner wall of the housing.

[0009] Preferably, the top of both the positive and negative electrode plates are fixedly connected to two positioning posts, and the top of the electrode tab is provided with a positioning hole that cooperates with the positioning posts.

[0010] Preferably, an anti-slip pad is fixedly connected to the bottom of the pressure plate, and the anti-slip pad is made of rubber.

[0011] Preferably, the bottom of the threaded rod is provided with a bearing, and is rotatably connected to the top of the lithium battery through the bearing.

[0012] Preferably, a sliding block is fixedly connected to one side of the transmission block, and a sliding groove is provided on the inner wall of the positioning frame to cooperate with the sliding block.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, by setting up an installation mechanism, allows the electrode tab to be removed after damage by rotating a screwing block. The screwing block will drive the threaded rod to rotate around the bearing. As the threaded rod rotates, its external thread will press against the internal thread of the threaded hole, causing the transmission block to move upward. The transmission block will then drive the pressure plate to move upward, allowing the electrode tab to be removed. After replacing it with a new electrode tab, the screwing block is rotated in the opposite direction, and the pressure plate will eventually press the electrode tab in place, completing the replacement of the electrode tab. This method avoids the welding process, making the electrode tab easy to disassemble and replace. 2. This utility model, by setting an anti-loosening mechanism, can push the pressing block away from the screwing block. The pressing block will drive the linkage block, the moving block, and the pin to move. After the electrode tab is connected by the installation mechanism, the pressing block is released. The elastic force generated by the spring will push the moving block away from the spring. The moving block will drive the linkage block and the pin to move, so that the pin enters the corresponding pin hole. This prevents the screwing block and the threaded rod from loosening due to vibration, and further improves the stability of the electrode tab. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the unfolded pressure plate of this utility model; Figure 3 This is a perspective view of a partial cross-section of the structure in this utility model; Figure 4 This is a perspective view of the anti-loosening mechanism in this utility model.

[0015] In the diagram: 1. Lithium battery; 2. Positive electrode; 3. Negative electrode; 4. Tab; 5. Positioning frame; 6. Twisting block; 7. Threaded rod; 8. Transmission block; 9. Pressure plate; 10. Threaded hole; 11. Housing; 12. Moving block; 13. Linkage block; 14. Pin; 15. Pin hole; 16. Pressing block; 17. Spring; 18. Positioning pin; 19. Positioning hole; 20. Anti-slip pad; 21. Bearing; 22. Sliding block; 23. Sliding groove. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1 - Figure 4 As shown, Example 1: A detachable lithium battery tab connection structure includes a lithium battery 1. A positive electrode 2 and a negative electrode 3 are fixedly arranged on the top of the lithium battery 1. A tab 4 is provided on the top of both the positive electrode 2 and the negative electrode 3. A positioning frame 5 is provided on one side of the tab 4. An installation mechanism is provided inside the positioning frame 5. The installation mechanism includes a screwing block 6 set on the top of the positioning frame 5. A threaded rod 7 is fixedly connected to the bottom of the screwing block 6. The bottom of the threaded rod 7 extends through to the bottom of the positioning frame 5. A transmission block 8 is connected to the surface of the threaded rod 7. A pressure plate 9 is fixedly connected to one side of the transmission block 8. A threaded hole 10 that mates with the threaded rod 7 is opened on the top of the transmission block 8. Anti-loosening mechanism, which is fixedly installed on the installation mechanism.

[0018] In this embodiment, considering that the lithium battery 1 typically has two tabs 4, usually welded to the positive and negative terminals, and that it is difficult to disassemble and replace a damaged tab 4 without tools, an installation mechanism is provided. This mechanism allows for easy replacement of a damaged tab 4 by rotating the screwing block 6. The screwing block 6 then drives the threaded rod 7 to rotate around the bearing 21. As the threaded rod 7 rotates, its external threads press against the internal threads of the threaded hole 10, causing the transmission block 8 to move upwards. The transmission block 8 then drives the pressure plate 9 to move upwards. Figure 2 As shown, the tab 4 can then be removed and replaced with a new tab 4. Then, rotate the screw block 6 in the opposite direction, repeating the steps above. Finally, the pressure plate 9 will press the tab 4 down, completing the replacement of the tab 4. This method avoids the welding process and makes the tab 4 easy to disassemble and replace.

[0019] The top of both the positive electrode 2 and the negative electrode 3 are fixedly connected to two positioning posts 18, and the top of the electrode tab 4 is provided with a positioning hole 19 that is used in conjunction with the positioning posts 18.

[0020] In this embodiment, by setting a positioning post 18 and a positioning hole 19, the stability of the electrode tab 4 can be improved by allowing the positioning post 18 to enter the positioning hole 19 when installing the electrode tab 4.

[0021] The bottom of the pressure plate 9 is fixedly connected to an anti-slip pad 20, which is made of rubber.

[0022] In this embodiment, by setting the anti-slip pad 20, the stability of the pressure plate 9 in fixing the tab 4 can be improved, and at the same time, the pressure plate 9 will not directly contact the tab 4, thus avoiding deformation and damage to the tab 4.

[0023] The bottom of the threaded rod 7 is provided with a bearing 21, and is rotatably connected to the top of the lithium battery 1 through the bearing 21.

[0024] In this embodiment, by setting the bearing 21, the threaded rod 7 can be supported, and the threaded rod 7 can only rotate around the bearing 21, which can also effectively improve the smoothness and stability of the rotation process.

[0025] A sliding block 22 is fixedly connected to one side of the transmission block 8, and a sliding groove 23 that cooperates with the sliding block 22 is provided on the inner wall of the positioning frame 5.

[0026] In this embodiment, by setting the sliding block 22 and the sliding groove 23, when the threaded rod 7 drives the transmission block 8, the transmission block 8 and other structures can only move along the sliding groove 23, thus limiting the movement trajectory.

[0027] Example 2: Based on Embodiment 1, in this embodiment, the installation mechanism uses the threaded rod 7 to drive the pressure plate 9 to press on the tab 4 to fix the tab 4. However, considering that many vehicle lithium batteries 1 will vibrate during vehicle operation, causing the threaded rod 7 to loosen and affecting the stability of the tab 4, the anti-loosening mechanism in this application includes a housing 11 fixedly connected to one side of the positioning frame 5. A moving block 12 is slidably connected to the inner wall of the housing 11. A linkage block 13 is fixedly connected to the top of the moving block 12. A pin 14 is fixedly connected to one side of the linkage block 13. Several pin holes 15 that cooperate with the pin 14 are opened on the circumferential side of the twisting block 6. Pressing blocks 16 are fixedly connected to both sides of the linkage block 13.

[0028] In this embodiment, by setting an anti-loosening mechanism, the pressing block 16 can be pushed away from the side of the tightening block 6. The pressing block 16 will drive the linkage block 13, the moving block 12 and the pin 14 to move. After the electrode tab 4 is connected by the installation mechanism, the pressing block 16 is released. The elastic force generated by the spring 17 will push the moving block 12 away from the spring 17. The moving block 12 will drive the linkage block 13 and the pin 14 to move, so that the pin 14 enters the corresponding pin hole 15. This prevents the tightening block 6 and the threaded rod 7 from loosening due to vibration, and further improves the stability of the electrode tab 4.

[0029] A spring 17 is fixedly connected to one side of the movable block 12, and one end of the spring 17 is fixedly connected to the inner wall of the housing 11.

[0030] In this embodiment, by setting a spring 17, when the pressing block 16 is released, the elastic force generated by the spring 17 will push the moving block 12 to move away from the spring 17, thus achieving the function of resetting.

[0031] Working principle: After the tab 4 is damaged, rotating the screwing block 6 will cause the threaded rod 7 to rotate around the bearing 21. As the threaded rod 7 rotates, its external threads will press against the internal threads of the threaded hole 10, causing the transmission block 8 to move upwards. The transmission block 8 will then drive the pressure plate 9 to move upwards. Figure 2 As shown, the tab 4 can then be removed and replaced with a new tab 4. Then, rotate the screw block 6 in the opposite direction, which is the opposite of the above steps. Finally, the pressure plate 9 will press the tab 4 down, completing the replacement of the tab 4. This method avoids the welding process and makes the tab 4 easy to disassemble and replace. Alternatively, by pushing the pressing block 16 away from the twisting block 6, the pressing block 16 will drive the linkage block 13, the moving block 12, and the pin 14 to move. After the electrode tab 4 is connected by the mounting mechanism, the pressing block 16 is released. The elastic force generated by the spring 17 will push the moving block 12 away from the spring 17. The moving block 12 will drive the linkage block 13 and the pin 14 to move, so that the pin 14 enters the corresponding pin hole 15, preventing the twisting block 6 and the threaded rod 7 from loosening due to vibration, and further improving the stability of the electrode tab 4.

[0032] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A detachable lithium battery tab connection structure, comprising a lithium battery (1), wherein a positive electrode (2) and a negative electrode (3) are fixedly disposed on the top of the lithium battery (1), characterized in that: The top of the positive electrode (2) and the negative electrode (3) are provided with tabs (4), and a positioning frame (5) is provided on one side of the tabs (4). An installation mechanism is provided inside the positioning frame (5). The installation mechanism includes a screwing block (6) set on the top of the positioning frame (5), a threaded rod (7) fixedly connected to the bottom of the screwing block (6), the bottom of the threaded rod (7) extending through to the bottom of the positioning frame (5), a transmission block (8) being connected to the surface of the threaded rod (7), a pressure plate (9) being fixedly connected to one side of the transmission block (8), and a threaded hole (10) for cooperating with the threaded rod (7) being opened on the top of the transmission block (8). An anti-loosening mechanism is fixedly installed on the installation mechanism.

2. The detachable lithium battery tab connection structure according to claim 1, characterized in that: The anti-loosening mechanism includes a housing (11) fixedly connected to one side of the positioning frame (5). A moving block (12) is slidably connected to the inner wall of the housing (11). A linkage block (13) is fixedly connected to the top of the moving block (12). A pin (14) is fixedly connected to one side of the linkage block (13). Several pin holes (15) that cooperate with the pin (14) are opened on the circumferential side of the screwing block (6). Pressing blocks (16) are fixedly connected to both sides of the linkage block (13).

3. The detachable lithium battery tab connection structure according to claim 2, characterized in that: A spring (17) is fixedly connected to one side of the movable block (12), and one end of the spring (17) is fixedly connected to the inner wall of the housing (11).

4. The detachable lithium battery tab connection structure according to claim 1, characterized in that: The top of the positive electrode (2) and the negative electrode (3) are fixedly connected to two positioning posts (18), and the top of the electrode tab (4) is provided with a positioning hole (19) that cooperates with the positioning posts (18).

5. The detachable lithium battery tab connection structure according to claim 1, characterized in that: The bottom of the pressure plate (9) is fixedly connected to an anti-slip pad (20), which is made of rubber.

6. The detachable lithium battery tab connection structure according to claim 1, wherein: The bottom of the threaded rod (7) is provided with a bearing (21), and is rotatably connected to the top of the lithium battery (1) through the bearing (21).

7. The detachable lithium battery tab connection structure of claim 1, wherein: A sliding block (22) is fixedly connected to one side of the transmission block (8), and a sliding groove (23) is provided on the inner wall of the positioning frame (5) to cooperate with the sliding block (22).

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