Flexible package lithium battery

Abstract

The utility model belongs to the technical field of flexible package lithium battery production, and particularly relates to a flexible package lithium battery which comprises a bottom shell, side plates are arranged on the two sides of the bottom shell in a sliding mode, a top plate is arranged on the top of the bottom shell in a sliding mode, and first sliding rails are arranged at the front ends and the rear ends of the two sides of the bottom shell. A square frame is arranged between the two first sliding rails on one side in a sliding mode, first hole grooves are formed in the two ends of the top and the bottom of each square frame at equal intervals, limiting blocks are arranged at the two ends of the top and the bottom of each square frame in a sliding mode, grooves are formed in one sides of the limiting blocks, and second hole grooves are formed in the positions, close to the grooves, of one sides of the limiting blocks; springs are fixedly installed in the second hole grooves, and partition plates are arranged between the two square frames at equal intervals and fixed through the corresponding grooves. According to the utility model, the battery cells can be quickly fixed through the clapboards which can be quickly adjusted and mounted, so that the assembly efficiency of the lithium battery and the stability of the battery pack are improved.

Description

Technical Field

[0001] This utility model belongs to the field of soft-pack lithium battery production technology, and specifically relates to a soft-pack lithium battery. Background Technology

[0002] With the diversification of application scenarios, the rigid structure of traditional batteries has gradually revealed its limitations, such as volume redundancy, large weight, and fixed shape, making it difficult to meet the needs of personalized design and compact space. Against this background, soft-pack lithium batteries, with their advantages of light weight, thinness, and customizable shape, have been widely used in portable electronic devices, electric vehicles, and energy storage systems.

[0003] Problems with existing technology:

[0004] When assembling traditional soft-pack lithium batteries, an insulating epoxy board needs to be added between adjacent battery cells using double-sided tape for isolation. Additionally, the outside of the battery pack needs to be protected with tape and plastic objects. This process is cumbersome and time-consuming. The bonding strength of the double-sided tape is relatively low, especially during long-term use. The high-temperature resistance of the double-sided tape is usually limited, making it prone to aging and peeling. This may result in the separation of the battery cell from the epoxy board, affecting the stability and reliability of the battery pack. Utility Model Content

[0005] The purpose of this invention is to provide a soft-pack lithium battery that can quickly fix the battery cells using a separator that can be quickly adjusted for installation, thereby improving the assembly efficiency of the lithium battery and the stability of the battery pack.

[0006] The specific technical solution adopted by this utility model is as follows:

[0007] A soft-pack lithium battery includes a bottom shell, side plates slidably disposed on both sides of the bottom shell, a top plate slidably disposed on the top of the bottom shell, and slide rails one at the front and rear ends of both sides of the bottom shell. A square frame is slidably disposed between two slide rails one on one side. A slot one is equidistantly disposed at both ends of the top and bottom of the two square frames. A limit block is slidably disposed at both ends of the top and bottom of the two square frames. A groove is disposed on one side of each limit block. A slot two is disposed on one side of each limit block near the groove. A spring is fixedly installed inside the slot two. A boss is fixedly installed at the end of the spring. A partition is equidistantly disposed between the two square frames and fixed by corresponding grooves. Battery cells are equidistantly disposed inside the bottom shell. A tab is fixedly installed on both sides of each battery cell.

[0008] Square grooves are provided at the four corners of both sides of the bottom shell. Square columns are integrally fixed at the four corners of the two side plates that are close to each other. The square columns are slidably arranged inside the corresponding square grooves. The two side plates are provided with grooves at equal intervals. The tabs slide through the interior of the corresponding grooves.

[0009] Each of the battery cells has a heat-conducting pad movably mounted on its top. Each heat-conducting pad has a groove on one side, and the tabs slide through the corresponding grooves.

[0010] The top of the bottom shell is provided with slide rails at both the front and rear ends. The bottom of the top plate is provided with protrusions at both the front and rear ends, close to the slide rails. The two protrusions are slidably disposed inside the corresponding slide rails.

[0011] The front and rear ends of the partition are integrally provided with anti-slip texture.

[0012] The technical effects achieved by this utility model are as follows:

[0013] This invention, when assembling battery cells, involves placing multiple cells inside the bottom shell, sliding the square frame into the slide rail, placing a partition between two cells, and positioning the cells close to the rear end of the bottom shell. After determining the partition's position, the groove of the limiting block is aligned with both sides of the partition and slid in. The limiting block is then slid into the top of the square frame and secured into the corresponding slot using a spring and a boss, thus fixing the partition. A heat-conducting pad is placed on top of the cell, and the tab is inserted into the corresponding slot of the side plate through the second slot. The side plate is then fixed by inserting a square post into the square slot. Finally, the top plate is slid to the top of the bottom shell through the slide rail to seal and fix the cell. This method improves the efficiency of cell production and assembly, enhances the stability of cell assembly, avoids the aging and peeling of existing double-sided adhesive after prolonged use, and improves the production quality of lithium batteries. Attached Figure Description

[0014] Figure 1 This is an axonometric view provided by an embodiment of the present invention;

[0015] Figure 2 This is an exploded view provided by an embodiment of the present invention;

[0016] Figure 3 This is an exploded view provided by an embodiment of the present invention;

[0017] Figure 4 This is provided by an embodiment of the present utility model. Figure 2 Schematic diagram at point A in the middle;

[0018] Figure 5 This is provided by an embodiment of the present utility model. Figure 3 Schematic diagram at point B in the middle;

[0019] Figure 6 This is an exploded view of the limiting block provided in an embodiment of this utility model.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1. Bottom shell; 2. Side plate; 3. Top plate; 4. Electrode lug; 5. Slot 1; 6. Thermal pad; 7. Slot 2; 8. Square frame; 9. Partition plate; 10. Anti-slip texture; 11. Battery cell; 12. Square column; 13. Slide rail 1; 14. Slide rail 2; 15. Square slot; 16. Hole slot 1; 17. Limiting block; 18. Hole slot 2; 19. Groove; 20. Boss; 21. Spring. Detailed Implementation

[0022] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0023] like Figures 1-6 As shown, a soft-pack lithium battery includes a bottom shell 1, side plates 2 slidably disposed on both sides of the bottom shell 1, a top plate 3 slidably disposed on the top of the bottom shell 1, slide rails 13 at the front and rear ends of both sides of the bottom shell 1, a square frame 8 slidably disposed between the two slide rails 13 on one side, slots 16 equidistantly disposed at the top and bottom ends of the two square frames 8, limit blocks 17 slidably disposed at the top and bottom ends of the two square frames 8, a groove 19 disposed on one side of the limit block 17, a slot 28 disposed on one side of the limit block 17 near the groove 19, a spring 21 fixedly installed inside the slot 28, a boss 20 fixedly installed at the end of the spring 21, partitions 9 equidistantly disposed between the two square frames 8 and fixed by corresponding grooves 19, and battery cells 11 equidistantly disposed inside the bottom shell 1, with tabs 4 fixedly installed on both sides of the battery cells 11.

[0024] See attached document Figure 2 and Figure 4 Square grooves 15 are provided at the four corners on both sides of the bottom shell 1. Square columns 12 are integrally fixed at the four corners of the two side plates 2 that are close to each other. The square columns 12 are slidably set inside the corresponding square grooves 15. The two side plates 2 are provided with grooves 5 at equal intervals. The tabs 4 slide through the interior of the corresponding grooves 5.

[0025] According to the above structure, when assembling the soft-pack lithium battery, the square frame 8 is slid into the inner side of the bottom shell 1 via the slide rail 13, and multiple battery cells 11 are placed inside the bottom shell 1. The separator 9 is placed between two battery cells 11, and the separator 9 is pushed to move one side of the battery cell 11 closer to the rear end of the bottom shell 1. After determining the position of the separator 9, the groove 19 on one side of the limiting block 17 is aligned with the separator 9, and the limiting block 17 is slid into the top and bottom ends of the square frame 8, so that the protrusion 20 is engaged into the corresponding slot 16 by the spring 21, thereby fixing the position of the separator 9 and the battery cell 11. At this time, the heat-conducting pad 6 is placed on the top of the battery cell 11, so that the tab 4 slides into the inside of the groove 7. 6. The tab 4 is calibrated by the second groove 7. At this time, the first groove 5 of the side plate 2 is aligned with one end of the tab 4 and inserted into the first groove 5. The square post 12 is then inserted into the corresponding square groove 15 of the bottom shell 1 to fix the side plate 2. The packaging efficiency of the cell 11 is improved by sliding assembly, and the stability of the existing cell 11 assembly is improved. This avoids the aging and falling off of the existing tape due to long-term use, improves the stability of the cell 11 fixation, and prevents the cell 11 from sliding, which would affect the stability of the connection between the tab 4 and the interface. This improves the production quality of the lithium battery. At the same time, the position of the limiting block 17 is adjustable, which is convenient to adapt to the assembly and fixation of cells 11 of different thicknesses and sizes, and improves adaptability.

[0026] See attached document Figure 3 Each of the battery cells 11 has a heat-conducting pad 6 movably mounted on its top. Each heat-conducting pad 6 has a groove 7 on one side. The tabs 4 slide through the corresponding grooves 7. The top of the bottom shell 1 has slide rails 14 at both the front and rear ends. The bottom of the top plate 3 has protrusions integrally mounted at both the front and rear ends near the slide rails 14. The two protrusions slide inside the corresponding slide rails 14. The front and rear ends of the partition 9 are integrally provided with anti-slip textures 10.

[0027] According to the above structure, the thermal pad 6 dissipates heat from the cell 11 on the one hand, and facilitates the quick straightening of the tab 4 on the other hand, allowing the end of the tab 4 to be quickly inserted into the groove 5 of the side plate 2, thereby improving the assembly efficiency of the battery pack. At the same time, the thermal pad 6 cooperates with the top plate 3 to fix the cell 11, and the elastic thermal pad 6 can buffer the cell 11 to prevent it from shaking and causing damage. The slide rail 14 can quickly seal and fix the bottom shell 1 and the side plate 2, improving the overall stability. The anti-slip texture 10 improves the stability of the contact between the separator 9 and the cell 11, preventing the cell 11 from shaking and improving the stability of the battery pack.

[0028] The working principle of this utility model is as follows: When assembling a soft-pack lithium battery, the square frame 8 is slid into the inner side of the bottom shell 1 via the slide rail 13, and multiple battery cells 11 are placed inside the bottom shell 1. The separator 9 is placed between two battery cells 11, and the separator 9 is pushed to move one side of the battery cell 11 closer to the rear end of the bottom shell 1. After determining the position of the separator 9, the groove 19 on one side of the limiting block 17 is aligned with the separator 9, and the limiting block 17 is slid into the top and bottom ends of the square frame 8, so that the protrusion 20 is engaged into the corresponding slot 16 by the spring 21, thereby fixing the position of the separator 9 and the battery cell 11. At this time, the heat-conducting pad 6 is placed on the top of the battery cell 11, so that the tab 4 slides into the inside of the groove 7. Slide the thermal pad 6 and calibrate the tab 4 through the second groove 7. At this time, align the first groove 5 of the side plate 2 with one end of the tab 4 and insert it into the first groove 5. Then, insert the square post 12 into the corresponding square groove 15 of the bottom shell 1 to fix the side plate 2. Finally, slide the protrusion of the top plate 3 into the corresponding slide rail 14 to complete the initial encapsulation of the cell 11. The encapsulation efficiency of the cell 11 is improved by sliding assembly, and the stability of the existing cell 11 assembly is improved. This avoids the aging and falling off of the existing tape due to long-term use, improves the stability of the cell 11 fixation, and prevents the cell 11 from sliding, which would affect the stability of the connection between the tab 4 and the interface, thereby improving the production quality of the lithium battery.

[0029] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A soft-pack lithium battery, comprising a bottom shell (1), characterized in that: Side plates (2) are slidably provided on both sides of the bottom shell (1), and a top plate (3) is slidably provided on the top of the bottom shell (1). Slide rails (13) are provided at the front and rear ends of both sides of the bottom shell (1). A square frame (8) is slidably provided between the two slide rails (13) on one side. Holes (16) are provided at equal intervals at the top and bottom ends of the two square frames (8). Limiting blocks (17) are slidably provided at the top and bottom ends of the two square frames (8). One side of the limiting block (17) is opened A groove (19) is provided. A second hole (18) is provided on one side of the limiting block (17) and close to the groove (19). A spring (21) is fixedly installed inside the second hole (18). A boss (20) is fixedly installed at the end of the spring (21). A partition (9) is provided at equal intervals between the two square frames (8) and fixed by the corresponding groove (19). A battery cell (11) is provided at equal intervals inside the bottom shell (1). A tab (4) is fixedly installed on both sides of the battery cell (11).

2. A soft-pack lithium battery according to claim 1, characterized in that: Square grooves (15) are provided at the four corners on both sides of the bottom shell (1). Square columns (12) are integrally fixed at the four corners of the two side plates (2) on the side closest to each other. The square columns (12) are slidably arranged inside the corresponding square grooves (15). The two side plates (2) are equally spaced and have grooves (5). The tabs (4) slide through the interior of the corresponding grooves (5).

3. A soft-pack lithium battery according to claim 1, characterized in that: Each of the battery cells (11) has a heat-conducting pad (6) movably disposed on its top. Each of the heat-conducting pads (6) has a groove (7) on one side. The tabs (4) slide through the interior of the corresponding grooves (7).

4. A soft-pack lithium battery according to claim 1, characterized in that: The top of the bottom shell (1) is provided with slide rails 2 (14) at both the front and rear ends. The bottom of the top plate (3) is provided with protrusions at both the front and rear ends and near the slide rails 2 (14). The two protrusions are slidably arranged inside the corresponding slide rails 2 (14).

5. A soft-pack lithium battery according to claim 1, characterized in that: The front and rear ends of the partition (9) are integrally provided with anti-slip texture (10).

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