Battery structure for improving capacity of detachable battery and packaging method thereof

Abstract

The application discloses a battery structure and packaging method for improving the capacity of a detachable battery, which comprises a bent metal sheet, two groups of opposite side folds formed by inwardly bending the two side wings of the bent metal sheet, a bottom fold formed by inwardly bending the bottom of the bent metal sheet, a mounting cavity formed by the bottom fold and the two groups of side folds, and an inner cavity side groove formed between the bottom fold and the two groups of side folds; a bottom plastic sheet connected with the inner wall of the bottom fold and embedded in the inner cavity side groove; a U-shaped metal sheet; a battery core mounted in the mounting cavity; and a top plastic shell inserted into the top end of the bent metal sheet for closing the mounting cavity. The application reduces the thickness of the battery shell, increases the length and width of the battery core, and thus improves the capacity of the battery and enhances the surface strength of the battery.

Description

Technical Field

[0001] This invention relates to the field of lithium battery technology, and in particular to a battery structure and packaging method for improving the capacity of removable batteries. Background Technology

[0002] With continuous technological advancements and increasing market demand, more and more 3C electronic products, such as smartphones, tablets, and portable power banks, are requiring removable built-in batteries. However, under current technological conditions, removable battery structures often result in a relatively large loss of battery capacity within the same volume. This capacity loss not only affects battery life but also fails to fully meet the high standards consumers demand for extended battery life. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned defects in the prior art and provide a battery structure and packaging method for improving the capacity of removable batteries. This invention reduces the thickness of the battery casing and increases the length and width of the battery cell, thereby increasing the battery capacity and enhancing the surface strength of the battery.

[0004] To achieve the above objectives, the present invention provides a battery structure for improving the capacity of a removable battery, comprising:

[0005] A bent metal sheet, wherein the two sides of the bent metal sheet are folded inward to form two sets of oppositely arranged side folds, and the bottom of the bent metal sheet is folded inward to form a bottom fold. The bottom fold and the two sets of side folds enclose an installation cavity, and an inner cavity side groove is formed between the bottom fold and the two sets of side folds.

[0006] A bottom plastic sheet is connected to the inner wall of the bottom folded edge, and both sides of the bottom plastic sheet are embedded in the inner cavity side groove. A handle sticker is provided on the bottom plastic sheet.

[0007] The U-shaped metal sheet wraps around the ends of the two sets of side folds and is connected and positioned to the bottom plastic sheet;

[0008] The battery cell is installed inside the aforementioned mounting cavity, and a protective plate is connected to the top of the battery cell;

[0009] A top plastic shell is inserted into the top of the bent metal sheet to close the mounting cavity, and the top plastic shell is connected to the protective plate.

[0010] Furthermore, the outer side of the folded edge is bent to form a stepped connection position. The height of the connection position matches the thickness of the U-shaped metal sheet, so that the U-shaped metal sheet has a second wrapping edge that wraps around the connection position. The stepped connection position ensures that the outer surface of the U-shaped metal sheet and the bent metal sheet are flush after installation, avoiding user safety risks caused by exposed metal edges.

[0011] Furthermore, the lateral width of the bottom fold is smaller than the lateral width of the bent metal sheet, and a bend is formed between the bent metal sheet and the bottom fold. A transition portion perpendicular to the bottom fold is provided between the bend and the bent metal sheet. By providing this transition portion, a larger gap can be formed between the bottom fold and the two side folds, which facilitates the embedding and fixing of the bottom plastic sheet and improves structural stability.

[0012] Furthermore, each side of the bottom plastic sheet is provided with a first abutting portion, which is embedded in the inner cavity side groove. A first abutting position is formed at the top of the first abutting portion to abut against the side fold, and a second abutting position is formed at the lower end of the first abutting portion to abut against the bottom fold. The first abutting position limits and fixes the bottom plastic sheet in the vertical direction, and the second abutting position limits and fixes the bottom plastic sheet in the horizontal direction, preventing loosening or displacement during assembly or use. Simultaneously, the tight fit between the first abutting portion and the inner cavity side groove effectively improves the sealing performance and mechanical strength of the overall structure, further ensuring the stability and safety of the battery cell installation.

[0013] Furthermore, the bottom plastic sheet has upwardly protruding reinforcing positioning members at its four corners. The outer edge of the reinforcing positioning member abuts against the inner wall of the U-shaped metal sheet and the bent metal sheet, and the inner side of the reinforcing positioning member abuts against the four corners of the battery cell. The reinforcing positioning members enable precise positioning and anti-shake of the battery cell; the tight fit between the reinforcing positioning members and the inner wall of the U-shaped metal sheet and the bent metal sheet further enhances the overall rigidity of the structure, improves its resistance to impact and vibration, and ensures the stability and safety of the battery cell within the mounting cavity.

[0014] Furthermore, a mounting groove for the handle sticker is provided within the bottom plastic sheet. The bottom plastic sheet and the bottom folded edge are respectively provided with a first through hole and a second through hole for the handle sticker to pass through. This avoids the influence of the metal casing on the handle sticker, ensuring its integrity and functionality, while also preventing the handle sticker from being cut by the metal edge during use. The alignment and cooperation of the first and second through holes achieves reliable fixing and tension at both ends of the handle sticker, improving the ease of disassembly.

[0015] Furthermore, an injection hole for adhesive is provided on the bent metal sheet, connecting to the internal mounting cavity. Low-temperature injection molding compound is filled through this injection hole into the gaps between the battery cell and the U-shaped metal sheet and the bent metal sheet. After curing, this low-temperature injection molding compound forms a uniform sealing structure, effectively enhancing the adhesion strength between the battery cell and the metal casing, while simultaneously preventing the impact of high temperatures on the battery cell's performance. The injection molding compound fully fills all gaps through the injection hole, including the connection area between the side folds, bottom folds, and the bottom plastic sheet, improving the overall structure's waterproof, dustproof, and vibration-resistant performance, ensuring the safe and stable operation of the battery cell under complex operating conditions.

[0016] Furthermore, insulating adhesive is applied to the left and right sides of the battery cell, and double-sided adhesive is applied to the front and rear sides of the battery cell to bond with the inner walls of the bent metal sheet and the U-shaped metal sheet. The insulating adhesive covers the contact area between the battery cell sidewall and the metal components, effectively blocking electrical connections and preventing short circuit risks; the double-sided adhesive ensures a firm bond between the battery cell and the metal casing, improving the overall structural compactness. Simultaneously, the insulating adhesive and double-sided adhesive work synergistically to maintain the stability of the battery cell under vibration, preventing internal damage or external circuit malfunctions caused by displacement, further ensuring the safety and reliability of the battery module.

[0017] Furthermore, a metal hook is provided on the underside of the U-shaped metal sheet, and a snap-fit ​​groove matching the metal hook is provided at the front end of the bottom plastic sheet. The metal hook and the snap-fit ​​groove achieve an interference fit, ensuring a reliable connection between the bottom plastic sheet and the U-shaped metal sheet, preventing loosening or detachment after assembly; this snap-fit ​​structure eliminates the need for additional fasteners, simplifying the assembly process and improving production efficiency.

[0018] The present invention also provides a packaging method for a battery structure that improves the capacity of a removable battery, comprising the following steps:

[0019] S1. Provide battery cells and protection boards. Positive and negative tabs are led out from the battery cells. A terminal frame is provided on the protection board. A connection terminal is provided in the terminal frame. The connection terminal is welded and fixed to the positive and negative tabs.

[0020] S2. Apply insulating adhesive to both sides of the battery cell;

[0021] S3. A top plastic shell is provided, with a slot on the top plastic shell and a buckle on the side of the protective plate. The top plastic shell and the protective plate are installed by snapping together with the buckle and the slot.

[0022] S4. Apply double-sided tape to the front and back of the battery cell to obtain a semi-finished battery.

[0023] S5. Provide a bottom plastic sheet and a bent metal sheet, and embed both sides of the bottom plastic sheet into the inner cavity side groove, so that the first abutting position of the first abutting part abuts against the side folded edge, and the second abutting position of the first abutting part abuts against the bottom folded edge, so that the bottom plastic sheet is installed on the bottom folded edge of the bent metal sheet, and the bottom plastic sheet is installed inside the bent metal sheet.

[0024] S6. Provide handle stickers, and attach the handle stickers into the handle sticker mounting groove after passing them through the first through hole and the second through hole in sequence.

[0025] S7. Remove the release paper from the surface of the semi-finished battery and assemble it into the bent metal sheet, so that the double-sided adhesive on the back is attached to the inner wall of the bent metal sheet.

[0026] S8. Connect the U-shaped metal sheet and the bent metal sheet, and at the same time, bond the inner wall of the U-shaped metal sheet to the double-sided adhesive on the other side of the battery. Insert the metal hook of the U-shaped metal sheet into the snap-fit ​​groove for interference fit and fixation. In this way, the upper ends of the U-shaped metal sheet and the bent metal sheet cooperate with the top plastic shell to seal the metal cavity.

[0027] S9. Finally, inject low-temperature injection molding material through the injection hole in the bent metal sheet to fill the gap between the battery cell and the U-shaped metal sheet and the bent metal sheet.

[0028] Compared with the prior art, the present invention has the following advantages:

[0029] This invention innovatively employs a top plastic shell, a U-shaped metal sheet, a bent metal sheet, and a bottom plastic component embedded within the bent metal sheet. This design completely replaces the traditional battery structure's use of front and rear plastic shells and additional steel sheets on both sides. This structural optimization significantly reduces the space occupied by the thickness of the plastic shell's sides and bottom, freeing up more effective space in the length and width of the battery cell. This allows for a substantial increase in energy storage capacity within the same volume. Furthermore, the combination of the U-shaped and bent metal sheets effectively enhances the overall surface strength of the battery. The embedded bottom plastic sheet design better addresses the technical challenge of reduced local structural strength caused by direct contact between the handle and the metal shell in traditional structures. This structural design improves battery performance while ensuring product reliability and safety, providing a completely new solution for battery structural optimization. Attached Figure Description

[0030] To more clearly illustrate the technology in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of a battery structure for improving the capacity of a removable battery according to the present invention;

[0032] Figure 2 yes Figure 1 A schematic diagram of the decomposition process;

[0033] Figure 3 This is a schematic diagram of the structure of the bent metal sheet of the present invention;

[0034] Figure 4 yes Figure 3 Enlarged view of region A in the middle;

[0035] Figure 5 This is a schematic diagram of the structure of the bottom plastic sheet of the present invention;

[0036] Figure 6 yes Figure 5 Another perspective illustration;

[0037] Figure 7 This is a schematic diagram of the connection state of the bottom plastic sheet embedded in the bent metal sheet according to the present invention;

[0038] Figure 8 This is a schematic diagram of the structure of the U-shaped metal sheet of the present invention.

[0039] The diagram includes:

[0040] 1. Bending metal sheet; 11. Side fold; 111. Connecting position; 112. Stepped notch; 12. Bottom fold; 121. Bending point; 122. Wrapping part; 1221. Second notch; 123. Second through hole; 13. Mounting cavity; 14. Cavity side groove; 15. Transition part; 16. Glue injection hole; 2. Bottom plastic sheet; 21. First abutting part; 211. First abutting position; 212. Second abutting position; 213. 1. Boss structure; 2. Support foot; 2. Hand-mounted groove; 2. First through hole; 2. Reinforcing positioning piece; 2. Snap-fit ​​groove; 3. U-shaped metal piece; 3. Metal hook; 3. Second wrapping edge; 4. Battery cell; 4. Insulating glue; 4. Double-sided adhesive; 43. Positive and negative electrode ears; 5. Top plastic shell; 5. Slot; 52. Plug-in part; 6. Handle sticker; 7. Protective plate; 71. Connecting terminal; 72. Buckle. Detailed Implementation

[0041] The technology of this embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiment is one embodiment of the present invention, and not all embodiments thereof. Based on this embodiment of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0043] Furthermore, if the embodiments of the present invention involve descriptions such as "first" or "second", such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0044] like Figures 1 to 8 The present invention discloses a battery structure for improving the capacity of a removable battery, including a bent metal sheet 1, a bottom plastic sheet 2, a U-shaped metal sheet 3, a battery cell 4, and a top plastic shell 5. The bent metal sheet 1 and the U-shaped metal sheet 3 are made of stainless steel, but other materials can also be used, such as metal sheets made of steel, aluminum, iron, alloys, etc.

[0045] like Figures 1 to 3 As shown, in this embodiment, the two sides of the bent metal sheet 1 are folded inward to form two sets of opposing side folds 11, and the bottom of the bent metal sheet 1 is folded inward to form a bottom fold 12, as shown. Figure 2 As shown, the bottom fold 12 and the two sets of side folds 11 form a mounting cavity 13 with an opening at the front and top. An inner cavity side groove 14 is formed between the bottom fold 12 and the two sets of side folds 11. The U-shaped metal sheet 3 wraps around the ends of the two sets of side folds 11 and is connected and positioned with the bottom plastic sheet 2.

[0046] In this embodiment, the bottom plastic sheet 2 is placed on the inner wall of the bottom folded edge 12, and the two sides of the bottom plastic sheet 2 are embedded in the inner cavity side groove 14 for fixation, such as Figure 5 As shown, the bottom plastic sheet 2 has a first abutting part 21 on each side. During assembly, the first abutting part 21 is directly embedded in the inner cavity side groove 14.

[0047] In a preferred embodiment, for further optimization, such as... Figure 4 As shown, the horizontal width of the bottom folded edge 12 in this embodiment (i.e. Figure 3The width in the Y-axis direction is less than the lateral width of the bent metal sheet 1. A bend 121 is formed between the bent metal sheet 1 and the bottom fold 12. A transition portion 15 perpendicular to the bottom fold 12 is provided between the bend 121 and the bent metal sheet 1. By providing this transition portion 15, the bottom fold 12 can be moved away from the side folds 11 and the bent metal sheet 1 to form a larger gap, thereby providing sufficient space for the installation of subsequent components and avoiding assembly difficulties due to structural interference. The first abutment portion 21 protrudes outward from the bottom plastic sheet 2, and a first abutment portion 21 is formed at the top of the first abutment portion 21 that abuts against the side fold 11. The lower end of the first abutment part 21 forms a second abutment part 212 that abuts against the bottom folded edge 12. The first abutment part 211 limits and fixes the bottom plastic sheet 2 in the vertical direction of the Z-axis, and the second abutment part 212 limits and fixes the bottom plastic sheet 2 in the horizontal direction of the Y-axis, preventing it from loosening or shifting during assembly or use. The tight fit between the first abutment part 21 and the inner cavity side groove 14 effectively improves the sealing performance and mechanical strength of the overall structure, further ensuring the stability and safety of the battery cell 4 installation. Moreover, this embedded locking structure can effectively protect the bent metal sheet 1 and the U-shaped metal sheet 3.

[0048] like Figure 3 and Figure 4 As shown, a stepped connection position 111 is formed by bending along the outer side of the side fold 11. The height of the connection position 111 matches the thickness of the U-shaped metal sheet 3, so that the U-shaped metal sheet 3 is provided with a second wrapping edge 32. The second wrapping edge 32 wraps the connection position 111. The step structure of the connection position 111 formed on the side fold 11 makes the outer surface of the U-shaped metal sheet 3 flush with the outer surface of the bent metal sheet 1 after installation, avoiding the user safety risk caused by exposed metal edges. A wrapping part 122 for wrapping the bottom plastic sheet 2 is also provided on the outermost side of the bottom fold 12. The wrapping part 122 is formed by folding back along the outermost side of the bottom fold 12. After folding back, the wrapping part 122 is pressed against the outer surface of the bottom plastic sheet 2, realizing the limiting and fixing of the bottom plastic sheet 2 in the horizontal direction of the X-axis, preventing it from loosening or shifting during assembly or use.

[0049] It should be noted that an adhesive layer can be provided between the second wrapping edge 32 and the connecting position 111 for bonding, so that the second wrapping edge 32 wraps around the connecting position 111 and is fixed. Alternatively, a snap-fit ​​structure can be provided on the second wrapping edge 32 and the connecting position 111 for snap-fit ​​fixing, or the second wrapping edge 32 and the connecting position 111 can be directly welded and fixed, etc.

[0050] In other embodiments, a fastening component can be provided on the connecting position 111 to fasten the U-shaped metal sheet 3 and the side fold 11, further improving the firmness of the connection and assembly efficiency. Of course, in some embodiments, the U-shaped metal sheet 3 and the side fold 11 can also be connected by welding to improve the overall structure and seismic performance. The welding method can be laser welding or resistance welding.

[0051] After the wrapping part 122 is set, in order to make the top surface of the wrapping part 122 flush with the top surface of the first abutting part 21, a boss structure 213 matching the thickness of the wrapping part 122 is provided at the front end of the first abutting part 21. At the same time, in order to avoid interference of the boss structure 213 with the U-shaped metal sheet 3 and the connecting position 111, a stepped notch 112 matching the boss structure 213 is also provided at the corresponding position of the bent metal sheet 1. This ensures that the wrapping part 122 is flush with the top surface of the first abutting part 21, ensures that the overall structure is flat, and avoids stress concentration during assembly.

[0052] A handle sticker 6 is provided on the bottom plastic sheet 2, specifically, as follows: Figure 5 and Figure 6 As shown, a mounting groove 22 for mounting the handle sticker 6 is provided in the bottom plastic sheet 2. The bottom plastic sheet 2 and the bottom folded edge 12 are respectively provided with a first through hole 23 and a second through hole 123 for the handle sticker 6 to pass through. One end of the handle sticker 6 passes through the second through hole 123 and the first through hole 23 in sequence and is adhered to the mounting groove 22. This avoids the influence of the metal shell on the handle sticker 6, ensuring the integrity and functionality of the handle sticker 6, and ensuring that the handle sticker 6 is not cut by the metal edge during use. The alignment and cooperation of the first through hole 23 and the second through hole 123 achieves reliable fixation and tension at both ends of the handle sticker 6, improving the convenience of disassembly. A support foot 214 extends downward from the lower end of the first abutment part 21, allowing the lower end of the bottom folded edge 12 to be suspended, facilitating the subsequent use of the handle sticker 6.

[0053] In this embodiment, the handle sticker 6 is fixed in the handle sticker mounting groove 22 by adhesive bonding. In other embodiments, a locking post can be provided on the handle sticker mounting groove 22 and a locking hole can be provided on the handle sticker 6. Mechanical fixation is achieved by interference fit between the locking post and the locking hole on the handle sticker 6, which further improves the disassembly and assembly efficiency and connection reliability.

[0054] Preferably, in this embodiment, the bottom plastic sheet 2 has upwardly protruding reinforcing positioning members 24 on its four corners. The outer edge of the reinforcing positioning member 24 abuts against the inner wall of the U-shaped metal sheet 3 and the bent metal sheet 1, and the inner side of the reinforcing positioning member 24 abuts against the four corners of the battery cell 4. The reinforcing positioning member 24 enables precise positioning and anti-shaking of the battery cell 4. The tight fit between the reinforcing positioning member 24 and the inner wall of the U-shaped metal sheet 3 and the bent metal sheet 1 further enhances the overall rigidity of the structure, improves the impact and vibration resistance, and ensures the stability and safety of the battery cell 4 in the mounting cavity 13. Of course, it is preferable that the inner corners of the U-shaped metal sheet 3 and the bent metal sheet 1 are rounded.

[0055] By setting the inner cavity side groove 14 and the inner cavity structure of the bottom plastic sheet 2, the following can be achieved: Figure 7 As shown, the bottom plastic sheet 2 is placed inside the mounting cavity 13, with the thicker first abutment portions 21 at both ends positioned on the outside. This structure ensures that the assembly of the U-shaped metal sheet 3 and the connecting position 111 is not affected, resulting in a compact structure and a smooth appearance. Simultaneously, the bottom plastic sheet 2 does not occupy the internal space of the mounting cavity 13, maximizing the utilization of the cavity volume and increasing the density of the battery cell 4 arrangement.

[0056] like Figure 7 and Figure 8 As shown, a metal hook 31 is provided on the lower side of the U-shaped metal sheet 3, and a snap-fit ​​groove 25 matching the metal hook 31 is provided at the front end of the bottom plastic sheet 2. At the same time, a second notch 1221 that mates with the snap-fit ​​groove 25 is also provided on the wrapping part 122. The metal hook 31 and the snap-fit ​​groove 25 achieve an interference fit, ensuring a reliable connection between the bottom plastic sheet 2 and the U-shaped metal sheet 3, and preventing loosening or falling off after assembly. This snap-fit ​​structure does not require additional fasteners, simplifies the assembly process, and improves production efficiency.

[0057] like Figure 1 As shown, the battery cell 4 is installed inside the mounting cavity 13. Specifically, insulating adhesive 41 is provided on the left and right sides of the battery cell 4, and double-sided adhesive 42 is provided on the front and rear sides of the battery cell 4 to bond with the inner walls of the bent metal sheet 1 and the U-shaped metal sheet 3. The insulating adhesive 41 covers the contact area between the side wall of the battery cell 4 and the inner wall of the bent metal sheet 1, effectively blocking electrical connections and preventing short circuit risks; the double-sided adhesive 42 achieves a firm bond between the battery cell 4 and the bent metal sheet 1 and the U-shaped metal sheet 3, improving the overall structural compactness. At the same time, the insulating adhesive 41 and the double-sided adhesive 42 work together to keep the battery cell 4 stable in a vibration environment, avoiding internal damage or external circuit abnormalities caused by displacement, further ensuring the safety and reliability of the battery module. It should be noted that the number of battery cells 4 in this invention can be flexibly configured according to the size and design requirements of the mounting cavity 13, and can be arranged in series or in parallel, adapting to application scenarios with different capacities and voltage levels.

[0058] A protective plate 7 is connected to the top of the battery cell 4. Positive and negative tabs 43 are led out from the battery cell 4. A connection terminal 71 matching the positive and negative tabs 43 is provided on the protective plate 7. During assembly, the positive and negative tabs 43 and the connection terminal 71 are fixed by welding. Then, the top plastic shell 5 is connected to the protective plate 7. In this embodiment, the preferred method is to use a snap-fit ​​method for fixing. That is, a slot 51 is provided on the top plastic shell 5, and a corresponding buckle 72 is provided on the protective plate 7. The buckle 72 and the slot 51 are interference fit to achieve a screwless connection between the top plastic shell 5 and the protective plate 7, which simplifies the assembly process and improves production efficiency. In this embodiment, the protective plate 7 is arranged flat above the battery cell 4. In other embodiments, it can also be arranged vertically, laterally, or in other different directions as needed to adapt to different spatial layout requirements.

[0059] The top plastic shell 5 is inserted into the top of the bent metal sheet 1 to seal the mounting cavity 13, as shown. Figure 2 As shown, a plug-in portion 52 extends from the lower end of the top plastic shell 5. The size of the plug-in portion 52 matches the size of the mounting cavity 13, and it can be locked in place by interference fit with the interior of the U-shaped metal sheet 3 and the bent metal sheet 1 during assembly.

[0060] In addition, a glue injection hole 16 is provided on the bent metal sheet 1, which is connected to the internal mounting cavity 13. The gap between the battery cell 4 and the U-shaped metal sheet and the bent metal sheet 1 is filled with low-temperature injection molding compound through the glue injection hole 16. In some embodiments, other materials can be used to replace the low-temperature injection molding compound. The requirements for materials are not limited one by one, as long as they meet the battery requirements to fill the internal gap. After curing, the low-temperature injection molding compound forms a uniform sealing structure, effectively enhancing the bonding strength between the battery cell 4 and the metal casing, while avoiding the impact of high temperature on the performance of the battery cell 4. The injection molding compound fully fills all gaps through the injection hole 16, including the connection area between the side folded edge 11, the bottom folded edge 12 and the bottom plastic sheet 2, improving the overall structure's waterproof, dustproof and vibration-resistant performance, ensuring the safe and stable operation of the battery cell 4 under complex working conditions. In this embodiment, injection holes 16 are provided at the upper and lower ends of both sides of the bent metal sheet 1. Generally, the low-temperature injection molding compound is injected into the entire interior of the mounting cavity 13, so that the low-temperature injection molding compound fills the gaps inside the entire mounting cavity 13. Of course, low-temperature injection molding compound can also be injected only at the required locations, such as the upper end or the lower end of the battery cell 4, to achieve local gap filling. Similarly, the position of the injection hole 16 can also be adjusted as needed to adapt to different filling requirements.

[0061] In some embodiments, the bent metal sheet 1 and the U-shaped metal sheet 3 can be manufactured using an integrated bending forming process. Their outer surfaces can be colored, engraved, screen-printed, or have labels applied to enhance product appearance and brand value. The inner walls of the bent metal sheet 1 and the U-shaped metal sheet 3 can also be colored or surface-treated to enhance adhesion, such as sandblasting, electrophoresis, or coating processes, such as insulating coatings, to further improve the bonding strength between the low-temperature injection molding compound and the metal surface, ensuring structural stability and long-term reliability.

[0062] Furthermore, when disassembly is required, first loosen the connection between the second wrapping edge 32 and the connecting position 111, and then remove the metal hook 31 from the snap-fit ​​groove 25. This allows the U-shaped metal sheet 3 to be disassembled, thereby revealing the internal battery cell. Then, remove the battery cell 4, protection plate 7, and top plastic shell 5 from the bent metal sheet 1, and then disassemble the protection plate 7 and top plastic shell 5 to complete the disassembly. If a new battery cell 4 needs to be installed, it can be installed according to the following encapsulation method.

[0063] The present invention also provides a packaging method for a battery structure that improves the capacity of a removable battery, comprising the following steps:

[0064] S1. Provide a battery cell 4 and a protection board 7. Lead out positive and negative tabs 43 from the battery cell 4. Provide a terminal frame on the protection board 7. Provide a connection terminal 71 in the terminal frame. Weld the connection terminal 71 to the positive and negative tabs 43 for fixation.

[0065] S2. Apply insulating adhesive 41 to both sides of the battery cell 4;

[0066] S3. A top plastic shell 5 is provided, and a slot 51 is provided on the top plastic shell 5. The side wing of the protective plate 7 is provided with a buckle 72. The top plastic shell 5 and the protective plate 7 are installed by fastening the buckle 72 and the slot 51.

[0067] S4. Apply double-sided tape 42 to the front and back of cell 4 to obtain a semi-finished battery.

[0068] S5. Provide a bottom plastic sheet 2 and a bent metal sheet 1, and embed both sides of the bottom plastic sheet 2 into the inner cavity side groove 14, so that the first abutting position 211 of the first abutting part 21 abuts against the side folded edge 11, and the second abutting position 212 of the first abutting part 21 abuts against the bottom folded edge 12, so that the bottom plastic sheet 2 is installed on the bottom folded edge 12 of the bent metal sheet 1, and the bottom plastic sheet 2 is installed inside the bent metal 1;

[0069] S6. Provide handle sticker 6, pass the handle sticker 6 through the first through hole 23 and the second through hole 123 in sequence, and then stick it into the handle sticker mounting groove 22;

[0070] S7. Remove the release paper from the surface of the semi-finished battery and assemble it into the bent metal sheet 1, so that the double-sided adhesive 42 on the back side is attached to the inner wall of the bent metal sheet 1.

[0071] S8. Connect the U-shaped metal sheet 3 with the bent metal sheet 1, and at the same time, make the inner wall of the U-shaped metal sheet 3 bond with the double-sided adhesive 42 on the other side of the battery, and insert the metal hook 31 of the U-shaped metal sheet 3 into the snap-fit ​​groove 25 for interference fit and fixation, so that the upper ends of the U-shaped metal sheet 3 and the bent metal sheet 1 cooperate with the top plastic shell 5 to seal the metal cavity.

[0072] S9. Finally, inject low-temperature injection molding compound through the injection hole 16 in the bent metal sheet 1 to fill the gap between the battery cell 4 and the U-shaped metal sheet and the bent metal sheet 1.

[0073] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A battery structure for improving the capacity of a removable battery, characterized in that, include: A bent metal sheet (1) is formed by folding the two sides of the bent metal sheet (1) inward to form two sets of oppositely arranged side folds (11), and the bottom of the bent metal sheet (1) is folded inward to form a bottom fold (12). The bottom fold (12) and the two sets of side folds (11) enclose an installation cavity (13). An inner cavity side groove (14) is formed between the bottom fold (12) and the two sets of side folds (11). Bottom plastic sheet (2), the bottom plastic sheet (2) is connected to the inner wall of the bottom fold (12), and the two sides of the bottom plastic sheet (2) are embedded in the inner cavity side groove (14), and a handle sticker (6) is provided on the bottom plastic sheet (2). U-shaped metal sheet (3), the U-shaped metal sheet (3) wraps around the ends of the two sets of side folds (11) and is connected and positioned with the bottom plastic sheet (2); Battery cell (4), the battery cell (4) is installed inside the above-mentioned mounting cavity (13), and a protective plate (7) is connected to the top of the battery cell (4). A top plastic shell (5) is inserted into the top of the bent metal sheet (1) to close the mounting cavity (13), and the top plastic shell (5) is connected to the protective plate (7).

2. The battery structure for improving the capacity of a removable battery according to claim 1, characterized in that, The outer side of the side fold (11) is bent to form a stepped connection position (111), and the height of the connection position (111) matches the thickness of the U-shaped metal sheet (3).

3. The battery structure for improving the capacity of a removable battery according to claim 1, characterized in that, The lateral width of the bottom fold (12) is smaller than the lateral width of the bent metal sheet (1). A bend (121) is formed between the bent metal sheet (1) and the bottom fold (12). A transition portion (15) perpendicular to the bottom fold (12) is provided between the bend (121) and the bent metal sheet (1).

4. The battery structure for improving the capacity of a removable battery according to claim 3, characterized in that, The bottom plastic sheet (2) is provided with a first abutting part (21) on both sides. The first abutting part (21) is embedded in the inner cavity side groove (14). A first abutting position (211) is formed at the top of the first abutting part (21) to abut against the side fold (11), and a second abutting position (212) is formed at the bottom end of the first abutting part (21) to abut against the bottom fold (12).

5. The battery structure for improving the capacity of a removable battery according to claim 4, characterized in that, The bottom plastic sheet (2) has upwardly protruding reinforcing positioning members (24) on its four corners. The outer edge of the reinforcing positioning member (24) abuts against the inner wall of the U-shaped metal sheet (3) and the bent metal sheet (1), and the inner side of the reinforcing positioning member (24) abuts against the four corners of the battery cell (4).

6. The battery structure for improving the capacity of a removable battery according to claim 1, characterized in that, A handle mounting groove (22) for mounting the handle sticker (6) is provided in the bottom plastic sheet (2). The bottom plastic sheet (2) and the bottom folded edge (12) are respectively provided with a first through hole (23) and a second through hole (123) for the handle sticker (6) to pass through.

7. The battery structure for improving the capacity of a removable battery according to claim 1, characterized in that, A glue injection hole (16) communicating with the internal mounting cavity (13) is provided on the bent metal sheet (1). The gap between the battery cell (4) and the U-shaped metal sheet (3) and the bent metal sheet (1) is filled with low-temperature injection molding glue through the glue injection hole (16).

8. The battery structure for improving the capacity of a removable battery according to claim 1, characterized in that, Insulating adhesive (41) is provided on the left and right sides of the battery cell (4), and double-sided adhesive (42) is provided on the front and rear sides of the battery cell (4) to bond with the inner walls of the bent metal sheet (1) and the U-shaped metal sheet (3).

9. A battery structure for improving the capacity of a removable battery according to claim 1, characterized in that, A metal hook (31) is provided on the lower side of the U-shaped metal sheet (3), and a snap-fit ​​groove (25) matching the metal hook (31) is provided on the front end of the bottom plastic sheet (2).

10. A packaging method for a battery structure to improve the capacity of a removable battery as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Provide a battery cell (4) and a protection board (7). Lead out positive and negative tabs (43) on the battery cell (4). Provide a terminal frame on the protection board (7). Provide a connection terminal (71) in the terminal frame. Weld the connection terminal (71) to the positive and negative tabs (43) to fix it. S2. Apply insulating adhesive (41) to the left and right sides of the battery cell (4). S3. Provide a top plastic shell (5), and set a slot (51) on the top plastic shell (5). The side wings of the protective plate (7) are provided with buckles (72). The top plastic shell (5) and the protective plate (7) are installed by fastening the buckles (72) and the slot (51). S4. Apply double-sided tape (42) to the front and back of the battery cell (4) to obtain a semi-finished battery; S5. Provide a bottom plastic sheet (2) and a bent metal sheet (1), and embed both sides of the bottom plastic sheet (2) into the inner cavity side groove (14), so that the first abutting position (211) of the first abutting part (21) abuts against the side fold (11), and the second abutting position (212) of the first abutting part (21) abuts against the bottom fold (12), so that the bottom plastic sheet (2) is installed on the bottom fold (12) of the bent metal sheet (1), and the bottom plastic sheet (2) is installed inside the bent metal sheet (1); S6. Provide handle sticker (6), pass the handle sticker (6) through the first through hole (23) and the second through hole (123) in sequence and then stick it into the handle sticker mounting groove (22); S7. Remove the release paper from the surface of the semi-finished battery and assemble it into the bent metal sheet (1), so that the double-sided adhesive (42) on the back side is attached to the inner wall of the bent metal sheet (1). S8. Connect the U-shaped metal sheet (3) with the bent metal sheet (1), and at the same time, bond the inner wall of the U-shaped metal sheet (3) to the double-sided adhesive (42) on the other side of the battery. Insert the metal hook (31) of the U-shaped metal sheet (3) into the snap-fit ​​groove (25) for interference fit and fixation. In this way, the upper ends of the U-shaped metal sheet (3) and the bent metal sheet (1) are fitted with the top plastic shell (5) to close the mounting cavity. S9. Finally, low-temperature injection molding compound is injected through the injection hole (16) in the bent metal sheet (1) to fill the gap between the battery cell (4) and the U-shaped metal sheet (3) and the bent metal sheet (1).

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