Novel tab packaging battery

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a novel tab packaged battery, which comprises two mutually overlapped battery cells, tabs are arranged at the top ends of the battery cells, the tabs are welded on a protective plate, and high-temperature adhesive tapes are adhered to two sides of the tabs; a protection frame is arranged on the side face of the battery cell in a surrounding mode, a groove used for containing the tab is formed in the protection frame, a plurality of protruding blocks are arranged on the protection plate, and first through holes buckled with the protruding blocks are formed in the protection frame; and a plastic package sheet is arranged on the outer surface of the battery cell, is fixedly connected with the protection frame through an injection molding process and wraps the battery cell. According to the novel tab packaged battery, the high-temperature adhesive paper is attached to the tab position of the battery cell, the buckling plate is arranged on the protection frame on the outer side of the battery cell to tightly buckle the protection plate electrically connected with the tab, the groove is formed in the position, corresponding to the tab, of the buckling plate so that the tab can be arranged in the groove, and the plastic packaging sheet covers the surface of the battery cell and the tab groove at the same time. Therefore, the tab can be well protected.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, and in particular relates to a novel tab-encapsulated battery. Background Technology

[0002] With the development of electronic products, battery packaging types have become increasingly diverse, broadly categorized into two main directions: internal and external. External batteries include different types such as glue-bonded, ultrasonically welded, and injection-molded batteries to meet various application requirements. Regardless of the type, the issue of electrode tab insulation is unavoidable, which imposes various limitations on many designs during implementation. In injection-molded batteries, where space for the tabs is limited, how to avoid tab exposure and provide protection is a pressing technical problem for those skilled in the art. Utility Model Content

[0003] This utility model adopts the following technical solution: a novel tab-encapsulated battery, comprising two stacked cells, each cell having a tab at its top, all tabs being welded to the same protective plate, and high-temperature adhesive tape adhered to both sides of the tabs; a protective frame surrounding the sides of the cell, the protective frame having grooves for accommodating the tabs, the protective plate having several protrusions, and the protective frame having first through holes for engaging with the protrusions; a plastic sealing sheet being provided on the outer surface of the cell, the plastic sealing sheet being fixedly connected to the protective frame through an injection molding process and encapsulating the cell within it.

[0004] In this invention, after the battery cells are aligned and stacked, double-sided adhesive is applied to adjacent bonding surfaces to fix the two battery cells and ensure that the tabs on the battery cells are aligned neatly. Then, the tabs are welded to the protective plate to achieve electrical connection. High-temperature adhesive tape is applied to both sides of the tabs to protect and isolate the connection between the tabs and the battery cells, avoiding the risk of exposure.

[0005] Then, a protective frame is set around the battery cell and the protection plate, and the protrusions on the protection plate are engaged into the first through hole of the protective frame for fixation and protection. Then, the battery cell, which is installed in the protective frame, is placed into the corresponding injection mold for injection molding to obtain a plastic seal that is fused and sealed with the protection plate. The plastic seal covers the grooves of the battery cell and the protection frame, and the tabs are protected by the high-temperature adhesive tape. Finally, the battery cell is wrapped with the plastic seal and the protective frame to obtain a battery with good sealing performance.

[0006] Preferably, the protective frame includes a top plate, side plates, a bottom plate, and a fastening plate. The top plate, side plates, and bottom plate surround the battery cell. The fastening plate is connected to the top plate and perpendicular to it. The groove and the first through hole are both located on the fastening plate. The protective frame is an integrally formed plastic frame. The fastening plate fixes the battery cell and the protective plate within the protective frame. The side plates and bottom plate define and protect the sides of the battery cell.

[0007] Preferably, the protective plate and the top plate are attached to each other, the protective plate has a protruding metal block, and the top plate has a second through hole, through which the metal block passes. The two connected battery cells are electrically connected and conduct electricity through the metal block.

[0008] Preferably, the bottom plate is provided with an elastic pad on the side facing the battery cell, the elastic pad abuts against the battery cell and tightly attaches the protective plate at the top of the battery cell to the top plate.

[0009] Preferably, the side plate has a limiting block on the side facing the battery cell, the limiting block abutting against the battery cell and forming a gap. During injection molding, the molten plastic can flow from the gap between the limiting block and the battery cell to the other side to fully cover the battery cell.

[0010] Preferably, a silicone pad is inserted between the electrode tab and the protective plate.

[0011] The silicone pad is filled between the stacked battery cells, and insulating tape is also attached to the outside of the high-temperature adhesive tape. The silicone pad serves to cushion the tabs of the two battery cells and fix the protection plate. The high-temperature adhesive tape is used to protect the two tabs on the same battery cell, and then each tab is insulated with an individual high-temperature adhesive tape.

[0012] Preferably, the groove width is 3-5 mm wider than the width of a single tab, and the length of the high-temperature adhesive tape is 5-7 mm longer than the outer distance between two tabs on the same battery cell. The insulating adhesive tape is disposed in the groove. The width of the insulating adhesive tape is slightly larger than the groove width so that the outer edge of the groove can press the insulating adhesive tape tightly against the protective frame for the next injection molding operation.

[0013] Preferably, double-sided adhesive is bonded between the battery cells, and a steel sheet is provided on the outside of the plastic seal to increase the overall strength of the battery.

[0014] Preferably, the steel sheet is covered with a trademark sticker, and a handle is also provided on the outside of the steel sheet. One end of the handle is attached to the outside of the steel sheet, and the other end of the handle goes around the bottom of the protective frame and is attached to the outside of the trademark sticker.

[0015] A method for preparing a novel tab-encapsulated battery according to any one or more of the claims includes the following steps:

[0016] Step (1): After the two battery cells are glued together with double-sided tape, the tabs on the battery cells are welded to the protection board. High-temperature adhesive paper is glued to both sides of the tabs, and then insulating adhesive paper is glued on the outside of the high-temperature adhesive paper.

[0017] Step (2): Insert the battery cell into the protective frame, and the protrusion on the protective plate engages with the first through hole;

[0018] Step (3): A plastic seal is formed on the outside of the battery cell by injection molding process. The plastic seal and the protective frame wrap the battery cell inside, and the battery is then prepared.

[0019] Specifically, in step (1), the high-temperature adhesive tape is first attached to the outside of the electrode tab, and then a silicone pad is inserted between the electrodes of the two overlapping battery cells, and then the insulating adhesive tape is attached to the electrode tab; in step (2), the battery cell shaped in step (1) is first inserted into the protective frame, and then the plastic sealing sheet is attached to the outside of the battery cell, and then the steel sheet is attached to the outside of the plastic sealing sheet; in step (3), after injection molding is completed, the surface is trimmed and burrs are removed, and then a trademark sticker is wrapped around it, and a handle is set between the trademark sticker and the steel sheet.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a novel tab-encapsulated battery and its preparation method. This novel tab-encapsulated battery is an injection-molded battery. High-temperature adhesive paper is attached to the tab position of the battery cell, and a fastening plate is set on the protective frame on the outside of the battery cell to fasten the protective plate electrically connected to the tab tightly. The fastening plate has a groove at the position corresponding to the tab to insert the tab, and the surface of the tab is shielded and protected by high-temperature adhesive paper. When the battery cell is wrapped in the injection molding process, in addition to being fused to the edges of the protective frame, the plastic sealing sheet also flows into the groove to form a closed plane for the tab part, which better protects the battery cell and the tab. Attached Figure Description

[0021] Figure 1 This is an exploded structural diagram of an embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of the protective frame structure according to an embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the protective frame structure of another embodiment of this utility model.

[0024] Figure label:

[0025] 1. Battery cell; 11. Electrode tab; 12. Protection board; 121. Protrusion block; 122. Metal block; 13. High-temperature adhesive tape; 14. Silicone pad; 15. Insulating adhesive tape; 16. Double-sided adhesive tape.

[0026] 2. Protective frame; 21. Top plate; 211. Second through hole; 22. Side plate; 23. Bottom plate; 24. Fastening plate; 241. Groove; 242. First through hole; 25. Elastic pad; 26. Limiting block.

[0027] 3. Plastic sealant, 4. Steel sheet, 5. Label sticker, 6. Handle. Detailed Implementation

[0028] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] Example 1:

[0030] like Figure 1-2 As shown, in this embodiment, the novel tab-encapsulated battery consists of a cell assembly, a protection plate 12, a protection frame 2, and a molding compound 3. The cell assembly is formed by two cells 1 of the same size and specifications, which are aligned and bonded together with double-sided adhesive 16. The tabs 11 at the top of the cells 1 are placed opposite each other, and the tabs 11 are welded to the protection plate 12 to maintain electrical connection so as to conduct energy out of the cells 1. A silicone pad 14 is inserted into the gap between the welded tabs 11 and the protection plate 12 to fix the position of the tabs 11 and the protection plate 12. The silicone pad 14 fills the gaps between the stacked cells 1 to fill and support them. High-temperature adhesive tape 13 is applied to the connection between the tab 11 and the battery cell 1 to protect the exposed parts of the tab 11 on the battery cell 1. The length of the high-temperature adhesive tape 13 is 6mm longer than the outermost spacing of the positive and negative tabs 11 on the battery cell 1, that is, there is a 3mm margin on both sides of the positive and negative tabs 11 to completely cover and protect the sides of the tabs 11. Then, insulating adhesive tape 15 is applied to the outside of the high-temperature adhesive tape 13. The insulating adhesive tape 15 is located outside the tab 11 to provide insulation protection.

[0031] The protective frame 2 is provided with a groove 241 corresponding to the tab 11. The width of the groove 241 is 4mm wider than the width of a single tab 11, so that the tab 11 can be placed into the groove 241. When the plastic sealing sheet 3 is formed by injection molding, the molten plastic is covered between the high-temperature adhesive paper 13 and the insulating adhesive paper 15 in the groove 241 to seal and fix the tab 11 and form a complete sealed battery cell 1 shell with the protective frame 2.

[0032] Specifically, the protective frame 2 is divided into a top plate 21, side plates 22, a bottom plate 23, and a fastening plate 24. The top plate 21 and the bottom plate 23 are opposite each other and connected by two side plates 22 to fix the battery cell assembly within its enclosed space. The fastening plate 24 is a horizontal panel perpendicular to the other plates and is used to fasten the battery cell 1 within the protective frame 2. The fastening plate 24 has a first through hole 242, and the protective plate 12 has a protruding block 121 that matches the first through hole 242. When the battery cell 1 is placed into the protective frame 2, the protruding block 121 is inserted into the first through hole 242 to fasten and fix it. Furthermore, the protective plate 12 has a metal block 122 on its front side, and the top plate 21 has a second through hole 211 corresponding to the metal block 122. The metal block 122 passes through the second through hole 211 to complete the electrical connection and energy transmission to the outside. All the above sections are molded as a single piece, which enhances their overall strength and sealing performance.

[0033] Specifically, the bottom plate 23 has an elastic pad 25 on the side facing the battery cell 1. The elastic pad 25 abuts against the battery cell 1 and tightly attaches the protective plate 12 at the top of the battery cell 1 to the top plate 21. The side plate 22 has a limiting block 26 on the side facing the battery cell 1. The limiting block 26 abuts against the battery cell 1 and forms a gap. After the protective frame 2 is installed, steel sheets 4 are placed on both sides of the battery cell 1. Before the steel sheets 4 are properly arranged, the outer plastic sealing sheet 3 can be prepared.

[0034] Furthermore, after the protective frame 2 has secured the battery cell 1 and the protective board 12, the aforementioned semi-finished product is placed into the corresponding injection mold for injection molding.

[0035] A plastic seal 3 is formed on the surface of the cell 1. The plastic seal 3 covers the built-in cavity of the protective frame 2 and can completely cover the entire cell 1 in the protective frame 2 through the gap formed between the cell 1 and the side plate 22 by the limiting block 26. The plastic seal 3 also covers the groove 241 of the fastening plate 24 to tightly seal the tab 11.

[0036] Specifically, after the battery cell 1 is injection molded, its shape is cleaned and modified, and then the corresponding trademark sticker 5 is wrapped on its outside. The trademark sticker 5 and the surface of the steel sheet 4 are connected to a handle 6, and the other end of the handle 6 goes around the bottom of the protective frame 2 and is attached to the outside of the trademark sticker 5.

[0037] Example 2:

[0038] like Figure 3As shown, the rest of the embodiments are the same as those in Embodiment 1. The difference is that the groove 241 provided on the fastening plate 24 of the protective frame 2 in this embodiment does not extend through the fastening plate 24 vertically, but is provided inside the fastening plate 24 on the side facing the battery cell 1. The side of the fastening plate 24 facing outward is a smooth plane. However, the groove 241 can also accommodate the molten plastic when the plastic sealing sheet 3 is formed by injection molding, and seal and protect the tab 11 after shaping.

[0039] Example 3:

[0040] In the technical solutions mentioned in Examples 1 and 2, the corresponding batteries can be prepared by the following method, which specifically includes the following steps:

[0041] Step (1): Two battery cells 1 are glued together with double-sided tape 16 to form a battery cell group. The tabs 11 on the battery cells 1 are all welded to the protection board 12. A silicone pad 14 is inserted between the tabs 11 and the protection board 12. High-temperature adhesive tape 13 is first attached to the tabs 11 of the battery cells 1. A silicone pad 14 is inserted between adjacent battery cells 1. Then, insulating adhesive tape 15 with insulating function is attached to the outside of the high-temperature adhesive tape 13 for protection.

[0042] Step (2): Insert the prepared battery cell 1 in step (1) into the protective frame 2. The protrusion 121 on the protective plate 12 is fastened into the first through hole 242, and the metal block 122 on the protective plate 12 passes through the second through hole 211 of the top plate 21.

[0043] Step (3): The battery cell 1 prepared in step (2) is externally injection molded to form a plastic seal 3. A steel sheet 4 is attached to the outside of the plastic seal 3. The plastic seal 3 and the protective frame 2 enclose the battery cell 1. After the injection molding is completed, the surface is trimmed and burrs are removed. The trademark sticker 5 is then covered and a handle 6 is set between the trademark sticker 5 and the steel sheet 4. The battery is then prepared.

[0044] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments described above, and any obvious improvements, substitutions, or modifications made by those skilled in the art based on this utility model are within the protection scope of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A novel tab-encapsulated battery, characterized in that: The device includes two stacked battery cells (1), each battery cell (1) having a tab (11) at its top, the tab (11) being welded to a protective plate (12), and high-temperature adhesive tape (13) being attached to both sides of the tab (11); a protective frame (2) is provided around the side of the battery cell (1), the protective frame (2) having a groove (241) for accommodating the tab (11), the protective plate (12) having a plurality of protrusions (121), and the protective frame (2) having a first through hole (242) that engages with the protrusions (121); a plastic sealing sheet (3) is provided on the outer surface of the battery cell (1), the plastic sealing sheet (3) being fixedly connected to the protective frame (2) by injection molding and encapsulating the battery cell (1) within it.

2. The novel tab-encapsulated battery according to claim 1, characterized in that: The protective frame (2) includes a top plate (21), a side plate (22), a bottom plate (23), and a fastening plate (24). The top plate (21), the side plate (22), and the bottom plate (23) surround the battery cell (1). The fastening plate (24) is connected to the top plate (21) and perpendicular to each other. The groove (241) and the first through hole (242) are both provided on the fastening plate (24).

3. The novel tab-encapsulated battery according to claim 2, characterized in that: The protective plate (12) is attached to the top plate (21). A metal block (122) protrudes from the protective plate (12). A second through hole (211) is provided on the top plate (21). The metal block (122) passes through the second through hole (211).

4. The novel tab-encapsulated battery according to claim 3, characterized in that: The bottom plate (23) is provided with an elastic pad (25) on the side facing the battery cell (1). The elastic pad (25) abuts against the battery cell (1) and tightly attaches the protective plate (12) at the top of the battery cell (1) to the top plate (21).

5. The novel tab-encapsulated battery according to claim 4, characterized in that: The side plate (22) is provided with a limiting block (26) on the side facing the battery cell (1), and the limiting block (26) abuts against the battery cell (1) and forms a gap.

6. The novel tab-encapsulated battery according to claim 1, characterized in that: A silicone pad (14) is inserted between the tab (11) and the protection plate (12). The silicone pad (14) fills the spaces between the stacked battery cells (1). An insulating adhesive paper (15) is also attached to the outside of the high-temperature adhesive paper (13).

7. The novel tab-encapsulated battery according to claim 6, characterized in that: The groove (241) is 3-5 mm wider than the width of a single tab (11), the high-temperature adhesive tape (13) is 5-7 mm longer than the outer distance between the two tabs (11) on the same battery cell (1), and the insulating adhesive tape (15) is disposed in the groove (241).

8. The novel tab-encapsulated battery according to claim 1, characterized in that: The battery cells (1) are bonded together with double-sided adhesive tape (16), and the plastic seal (3) is provided with a steel sheet (4).

9. The novel tab-encapsulated battery according to claim 8, characterized in that: The steel sheet (4) is covered with a trademark sticker (5). A handle (6) is provided on the outside of the steel sheet (4). One end of the handle (6) is attached to the outside of the steel sheet (4), and the other end of the handle (6) goes around the bottom of the protective frame (2) and is attached to the outside of the trademark sticker (5).

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