A replaceable smart ring battery structure

Abstract

The application relates to the technical field of consumer electronic battery, in particular to a replaceable smart ring battery structure which comprises an arc-shaped battery core, a circuit board, an injection plastic shell and a connector; a tab is led out from the head of the arc-shaped battery core; the circuit board is installed at the head of the arc-shaped battery core, one end of the circuit board is connected with the tab, and the opposite end of the circuit board is connected with the connector; the injection plastic shell is integrally formed by using hot melt adhesive material through low-pressure and low-temperature injection molding, the arc-shaped battery core is completely wrapped in the injection plastic shell, the head of the injection plastic shell is provided with a first inner cavity for accommodating the circuit board and the tab and at least one first through hole communicated with the first inner cavity, and the connector is connected with an external device through the first through hole. The application can effectively improve the protection performance of the micro ring battery, reduce the damage problem, realize the replacement and mass production of the battery, and reduce the use cost of users.

Description

Technical Field

[0001] This invention relates to the field of consumer electronics battery technology, and in particular to a replaceable smart ring battery structure. Background Technology

[0002] Consumer wearable electronics are facing new structural requirements. Current products mostly use integrated battery designs, but to improve environmental efficiency, some regions require removable, independently recyclable, and replaceable battery structures. This aims to reduce electronic waste and resource waste to meet increasingly stringent environmental requirements. As miniaturized wearable devices, smart rings have extremely limited internal assembly space and unique curved battery cell structures, placing extremely high demands on the miniaturization, sealing, insulation, aging resistance, and ease of assembly and disassembly of the battery packaging.

[0003] Currently, most smart ring batteries in the industry use the mainstream packaging method of original aluminum-plastic film sealing and manual bonding of insulating tape, both of which have insurmountable technical defects. Chinese patent CN202321948793.0 discloses a smart ring with a replaceable battery, but its battery uses traditional film protection. Disassembly and friction can easily cause the insulation layer to peel, break, and fall off, resulting in extremely poor protection reliability. Moreover, the conventional snap-on structure occupies a lot of space and cannot be adapted to the compact structure of a miniature ring. The soft-pack battery sealing structure disclosed in Chinese patent CN202511377058.X relies solely on the aluminum-plastic film sealing itself for protection. For the small arc-shaped structure of the ring battery, the sealing edge is prone to wrinkling, cracking, and the formation of tiny gaps. With long-term wear, it is susceptible to corrosion from sweat and moisture, which can easily lead to safety problems such as electrolyte leakage, insulation failure, and battery bulging.

[0004] Meanwhile, traditional high-pressure injection molding and resin potting processes involve high injection pressure and temperature, which can easily damage the micro cells, causing them to swell, increase internal resistance, and degrade performance. Furthermore, they have long molding cycles, generate a lot of waste, and cannot achieve precise, thin packaging, making them completely unsuitable for the miniaturized design requirements of ring batteries. Existing ring batteries generally use an integrated packaging structure, resulting in a mismatch between battery life and the lifespan of the main unit; battery failure means the entire device is scrapped, leading to high user costs. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned defects in the prior art and provide a replaceable smart ring battery structure. This invention can effectively improve the protection performance of micro ring batteries, reduce the problem of easy damage, and realize battery replacement and mass production, thereby reducing the user's usage cost.

[0006] To achieve the above objectives, the present invention provides a replaceable smart ring battery structure, including an arc-shaped battery cell, a circuit board, an injection-molded shell, and a connector.

[0007] The arc-shaped battery cell has a tab extending from its head; the circuit board is mounted on the head of the arc-shaped battery cell, with one end of the circuit board connected to the tab and the other end of the circuit board connected to the connector.

[0008] The injection-molded housing is integrally formed using hot melt adhesive material through low-pressure, low-temperature injection molding, completely enclosing the arc-shaped battery cell inside the injection-molded housing. The head of the injection-molded housing is provided with a first inner cavity for accommodating the circuit board and the electrode tabs, and at least one first through hole communicating with the first inner cavity. The connector connects to external devices through this first through hole.

[0009] Among them, the temperature of the low-pressure low-temperature injection molding is controlled at 80℃~120℃, and the injection pressure is controlled at 0.3MPa~1.5MPa.

[0010] Furthermore, the arc-shaped battery cell includes a first outer arc surface, a first inner arc surface, two first side surfaces, and a first bottom surface. The injection-molded shell also has a second inner cavity communicating with the first inner cavity. The upper and lower ends of the injection-molded shell are respectively provided with a first opening and a second opening communicating with the second inner cavity. The arc-shaped battery cell is installed in the second inner cavity, so that the two first side surfaces and the first bottom surface abut against the inner wall of the second inner cavity. The thickness of the injection-molded shell is 0.05~0.5mm. The second inner cavity and the first inner cavity are interconnected, forming a cavity structure that runs through the head of the injection-molded shell. After the arc-shaped battery cell is inserted into the second inner cavity through the first opening or the second opening, it is circumferentially covered by the injection-molded shell. The first inner cavity serves as the assembly space for connecting the circuit board and the electrode tab, communicating with the second inner cavity, so that the electrode tab can extend from the second inner cavity to the first inner cavity and connect with the circuit board. The thickness range of 0.05~0.5mm ensures the insulation protection level without occupying additional assembly space.

[0011] Furthermore, a first wrapping edge is provided at the first opening, which abuts against the side edge of the first outer arc surface. A second wrapping edge is provided at the second opening, which abuts against the side edge of the first inner arc surface. The two wrapping edges extend from the edge of the opening towards the side edges of the outer and inner arc surfaces of the arc-shaped battery cell and abut against each other, forming a sealing edge reinforcement for the opening end of the injection molded shell, preventing moisture from seeping in due to gaps caused by the shrinkage of the hot melt adhesive at the opening.

[0012] Furthermore, it also includes a protective shell, which is a semi-open arc-shaped shell. The injection-molded shell is installed inside the protective shell, so that the outer surface of the injection-molded shell is in close contact with the inner wall of the protective shell. The open arc-shaped protective shell is made of metal or rigid material and covers the outer periphery of the injection-molded shell to provide mechanical protection. The two first side surfaces and the first bottom surface of the injection-molded shell simultaneously abut against the inner wall of the protective shell, so that the two form a stable nested assembly.

[0013] Furthermore, the protective shell is made of stainless steel, titanium, ceramic, or other materials. These materials possess high hardness and corrosion resistance, enabling them to withstand impacts and friction during daily wear of the ring, and providing rigid support for the internal injection-molded shell and curved battery cell.

[0014] Furthermore, the circuit board is provided with a connection end for connecting to the electrode tab and an external connection end for connecting to the connector. The connection end and the external connection end are located at opposite ends of the circuit board, respectively undertaking the electrical connection with the electrode tab and the electrical connection with the connector, making the circuit board a transfer carrier between the electrode tab and the connector.

[0015] Furthermore, the circuit board is an FPC flexible board. Using an FPC flexible board as the circuit board can adapt to the bending shape of the curved battery cell and the injection molded shell, allowing for flexible arrangement within the limited space inside the ring, while reducing assembly stress and avoiding the risk of breakage of rigid circuit boards during bending.

[0016] Furthermore, the external terminal is the area extending outward from the other end of the circuit board away from the connection end, and the external terminal passes through the first through hole and is located outside the injection-molded shell. The external terminal extends outward from the injection-molded shell through the first through hole, facilitating connection with the electrical components of the smart ring.

[0017] Furthermore, the connector is disposed on one side of the external end, and a first reinforcing steel plate is disposed on the other side of the external end opposite to the connector. The FPC flexible board provides a flexible electrical connection path, and the first reinforcing steel plate provides mechanical support on the back. The two work together to ensure that the external end is flexible without being damaged by bending due to external forces.

[0018] Furthermore, the connector is a terminal wire, a wire, or a BTB (Board-to-Board) connector. One end of the connector is directly connected to the external terminal, and the other end is used to connect to other external devices. The terminal wire or wire solution is compatible with external lead-out connections, extending out of the injection-molded shell after conversion via an FPC flexible board to interface with the smart ring or other micro-hosts. The BTB connector is directly mounted on the FPC flexible board, eliminating the need for external lead wires and adapting to the board-to-board plug-and-play interface method.

[0019] Furthermore, the connecting end is located on one side of the circuit board, and the external end is located on the other side of the circuit board opposite to the connecting end. The connector is a pogopin connector or a gold finger connector, which is mounted on the external end. Two first through holes are provided on the injection-molded housing, located on the inner arc surface of the head of the injection-molded housing and positioned directly above the connector. This solution directly integrates the pogopin connector or gold finger connector into the external end, and provides two through holes on the inner arc surface of the head of the injection-molded housing corresponding to the connector position, allowing the connector's contact end to be exposed through the through holes. The host directly mates with the connector through these through holes.

[0020] Furthermore, it also includes a conductive component, which is a nickel sheet or a copper strip directly led out from the circuit board. The circuit board is electrically connected to the electrode tab via the conductive component. The conductive component acts as an electrical connection intermediary between the electrode tab and the connection end, providing a stable contact interface for subsequent soldering processes and ensuring the reliability of the electrical connection.

[0021] Furthermore, one end of the conductive component is directly led out from the connection terminal, and the other end of the conductive component is directly soldered to the electrode tab. The conductive component uses copper foil directly led out from the circuit board and directly soldered to the electrode tab, eliminating the need for additional conductive component assembly steps and improving production efficiency and connection reliability.

[0022] Furthermore, one end of the conductive component is welded to the connecting end, and the other end of the conductive component is bent to form a C-shaped structure. The electrode tab is also bent to form a C-shaped structure. The conductive component and the electrode tab are inserted into each other in opposite directions to form a compact, stacked assembly before being welded together. Both the electrode tab and the nickel sheet are pre-bent into C-shapes and then inserted into each other in opposite directions to form a stacked assembly. This allows for compact assembly and welding within the limited space of the first inner cavity of the injection-molded shell, avoiding the difficulty of bending and positioning them separately in a confined space.

[0023] Furthermore, the conductive element and the electrode are connected by spiral welding, wave welding, or threaded welding. These welding methods increase the contact area of ​​the weld joint, improving the mechanical strength and conductive reliability of the electrical connection between the electrode and the connection end.

[0024] Furthermore, a second reinforcing member is provided at the welding position between the conductive component and the connecting end, completely covering the connection between the conductive component and the connecting end. This second reinforcing member further strengthens the mechanical protection of the connection, preventing the weld from cracking due to bending or vibration.

[0025] Furthermore, it also includes insulating paper that covers the connection between the electrode tab and the circuit board. The insulating paper forms an insulating barrier at the soldering point between the electrode tab and the circuit board, preventing accidental contact between the soldered part and adjacent metal components that could lead to a short circuit.

[0026] Compared with the prior art, the beneficial effects of the present invention include:

[0027] This invention provides a protective enclosure for the arc-shaped battery cell using a low-pressure, low-temperature injection-molded shell. Only the connector's external end is exposed through a first through-hole in the first inner cavity at the head; the other two sides, the bottom, or the entire arc-shaped battery cell are completely covered with hot-melt adhesive, thus sealing the tiny gaps in the aluminum-plastic film edge sealing. Compared to traditional film application or native aluminum-plastic film edge sealing methods, the injection-molded shell mounts the entire arc-shaped battery cell within a second inner cavity. The open end is further reinforced with a second sealing edge, with the first and second wrapping edges abutting against the side edges of the outer and inner arc surfaces respectively. This secondary sealing prevents moisture, sweat, and dust from penetrating the battery cell through the opening or the edge sealing. The injection pressure of the low-pressure, low-temperature injection molding process is much lower than that of traditional high-pressure injection molding, and the injection temperature is controlled near the melting point of the hot melt adhesive. This will not cause compression or thermal damage to the micro-arc-shaped battery cells, avoiding problems such as cell expansion, increased internal resistance, and performance degradation. The injection thickness of 0.05~0.5mm also allows the protective layer to be encapsulated in a thin form without taking up additional assembly space. At the same time, the setting of the first and second openings can reduce the overall thickness of the battery, which can meet the miniaturization design requirements of rings.

[0028] Furthermore, the injection-molded housing head of the present invention houses the circuit board and the electrode tab through the first inner cavity, and the connector is connected to an external device through the first through hole, forming a detachable electrical interface between the battery and the main unit. When the battery life is exhausted, the user can simply disconnect the connector from the main unit to replace the battery by hand without scrapping the entire unit. This achieves the functions of being detachable and independently recyclable and replaceable, meeting the mandatory requirements of battery regulations such as those of the European Union, extending the service life of the entire unit and reducing the user's operating costs.

[0029] Secondly, a semi-open arc-shaped protective shell is added to the outer periphery of the injection-molded shell. The protective shell is made of hard materials such as stainless steel, titanium, or ceramic. The two first sides and the first bottom surface of the injection-molded shell are in close contact with the inner wall of the protective shell, so that the protective shell can withstand the collisions and friction that may occur during daily wear of the ring, and prevent the hot melt adhesive layer of low-pressure and low-temperature injection molding from directly bearing mechanical impact. The protective shell and the injection-molded shell form a nested structure, which improves the overall mechanical protection level.

[0030] This invention provides various connector layouts for different host interface methods. Terminal wires or conductors can be soldered onto an FPC flexible board for external lead-out interfaces; BTB connectors are integrated onto the FPC flexible board for board-to-board plug-and-play interfaces; alternatively, pogopin connectors or gold finger connectors can be directly integrated into the external terminal and exposed through two first through holes at corresponding positions on the injection-molded housing head, allowing the host to directly interface with the connector via these through holes. These multiple solutions can adapt to different host structures and waterproofing requirements. Attached Figure Description

[0031] 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 based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of a replaceable smart ring battery structure according to Embodiment 1 of the present invention;

[0033] Figure 2 yes Figure 1 A schematic diagram of the decomposition process;

[0034] Figure 3 yes Figure 1 Another perspective of the decomposed diagram;

[0035] Figure 4 This is a schematic diagram of the structure of the injection-molded shell of the present invention;

[0036] Figure 5 This is a schematic diagram of the front and back structures of the circuit board of the present invention;

[0037] Figure 6 This is a schematic diagram of the soldering state of the circuit board and the electrode tab of the present invention;

[0038] Figure 7 This is a schematic diagram of the spiral welding method of the present invention;

[0039] Figure 8 This is a schematic diagram of the wave welding method of the present invention;

[0040] Figure 9 This is a schematic diagram of the thread welding method of the present invention;

[0041] Figure 10 This is a schematic diagram of a replaceable smart ring battery structure according to Embodiment 3;

[0042] Figure 11 yes Figure 10 The front view;

[0043] Figure 12 yes Figure 10 A schematic diagram of the decomposition process;

[0044] Figure 13 This is a schematic diagram of the front and back structures of the circuit board in Example 4;

[0045] Figure 14 This is an exploded view of the battery structure in Example 4;

[0046] Figure 15 This is a cross-sectional schematic diagram of the battery structure in Example 4.

[0047] The diagram includes:

[0048] 1. Arc-shaped battery cell; 11. Electrode; 12. First outer arc surface; 13. First inner arc surface; 14. First side surface; 15. First bottom surface; 2. Circuit board; 21. Connecting end; 22. External terminal; 3. Injection molded shell; 31. First inner cavity; 32. First through hole; 33. Second inner cavity; 34. First opening; 341. First wrapping edge; 35. Second opening; 351. Second wrapping edge; 4. Connector; 5. Protective shell; 51. Third wrapping edge; 52. Shell opening; 6. Conductive component; 71. First reinforcing steel sheet; 72. Second reinforcing component; 8. Insulating paper. Detailed Implementation

[0049] The technology of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiment is one embodiment of the present invention, and not all embodiments. 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.

[0050] 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.

[0051] 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.

[0052] like Figures 1 to 15 As shown, the present invention provides a replaceable smart ring battery structure.

[0053] Example 1

[0054] like Figures 1 to 3As shown, the battery structure of this embodiment includes an arc-shaped cell 1, a circuit board 2, an injection-molded shell 3, and a connector 4. The arc-shaped cell 1 has tabs 11 extending from its head; the circuit board 2 is mounted on the head of the arc-shaped cell 1, with one end of the circuit board 2 connected to the tabs 11 and the other end connected to the connector 4; the injection-molded shell 3 is integrally molded onto the outer surface of the arc-shaped cell 1 using hot melt adhesive material under low pressure and low temperature injection molding, and the head of the injection-molded shell 3 is provided with a first inner cavity 31 for accommodating the circuit board 2 and the tabs 11, and at least one first through hole 32 communicating with the first inner cavity 31. The connector 4 connects to external devices through this first through hole 32.

[0055] The arc-shaped battery cell 1 is the energy storage core of the entire module. In this embodiment, a soft-pack polymer arc-shaped battery cell 1 can be used, with a radial thickness of 0.3~5.0mm, a width of 3.0~10.0mm, an arc length of 5.0~40.0mm, an inner arc radius of 6.0~30.0mm, and a maximum side sealing height of 1.45mm. This size can be adapted to the inner cavity of mainstream smart rings. Of course, the above-mentioned dimensions of the arc-shaped battery cell 1 are only an illustrative example, and the specific dimensions can be set according to different smart rings. The tabs 11 extend from the head of the arc-shaped battery cell 1. The spacing between the tabs 11 can be set to 1.0~10.0mm, the extension length is 1.0~15.0mm, and the total width is 3.0~10.0mm.

[0056] In this embodiment, the injection-molded shell 3 is integrally formed by low-pressure and low-temperature injection molding using hot melt adhesive material. Its head has a first inner cavity 31 for accommodating the circuit board 2 and the tabs 11. It should be noted that the selection of injection molding process parameters directly affects the safety of the battery cell. In this embodiment, the injection temperature is controlled at 80℃-120℃, the injection pressure at 0.3MPa-1.5MPa, and the curing cycle is no more than 10s. These parameters are fundamentally different from traditional high-pressure injection molding (typically pressure above 10MPa and temperature above 150℃). Preferably, a VOC-free, environmentally friendly, low-pressure, low-temperature injection hot melt adhesive material is used, possessing high insulation, high toughness, low shrinkage, and aging resistance. Through a customized arc-shaped precision mold, the irregular curved surfaces and dead corners of the battery cell are precisely filled and covered, ensuring full and gapless glue application, one-time molding, and rapid cooling and curing after molding, with a curing cycle ≤10s. After molding, the surface is smooth and flat, without bubbles, seams, or delamination defects. After curing, the structure exhibits high bonding strength, wear resistance, scratch resistance, and excellent moisture and corrosion resistance.

[0057] In addition, color-modified injection molding materials can be used to directly form a color layer on the surface of the battery cell, achieving integrated protection, insulation, and appearance marking, eliminating the need for traditional labeling and screen printing secondary processing steps.

[0058] In some embodiments, the injection-molded shell is integrally formed in the manner described above, so that the arc-shaped battery cell 1 is completely enclosed inside the injection-molded shell 3, with the connector 4's interface exposed only at the first through-hole 32, forming a fully enclosed insulating protective structure. This design effectively prevents external moisture, dust, sweat, etc., from entering the battery cell, while avoiding the risk of short circuits caused by exposed metal tabs.

[0059] As a preferred option, such as Figures 2 to 4 As shown, in this embodiment, the arc-shaped battery cell 1 includes a first outer arc surface 12, a first inner arc surface 13, two first side surfaces 14, and a first bottom surface 15. The injection-molded shell 3 is directly injection-molded integrally onto the outer surface of the battery cell. After molding, the injection-molded shell 3 is also provided with a second inner cavity 33 communicating with the first inner cavity 31. The upper end and lower end of the injection-molded shell 3 are respectively provided with a first opening 34 and a second opening 35 communicating with the second inner cavity 33. That is, the first opening 34 is an opening provided on the outer arc surface of the injection-molded shell 3, and the second opening 35 is an opening provided on the outer arc surface of the injection-molded shell 3. An opening is provided on the inner arc surface of the shell 3, and the arc-shaped battery cell 1 is installed in the second inner cavity 33, so that the two first side surfaces 14 and the first bottom surface 15 respectively abut against the inner wall of the second inner cavity 33. The head of the arc-shaped battery cell 1 is placed in the first inner cavity 31. The first opening 34 and the second opening 35 are provided to prevent the injection molded shell 3 from completely covering the arc-shaped battery cell 1. The first opening 34 and the second opening 35 are basically flush with the first outer arc surface 12 and the first inner arc surface 13, thereby controlling the thickness of the entire battery structure to adapt to the structure of a small-sized smart ring.

[0060] Preferably, the thickness of the injection molded shell 3 is 0.05~0.5mm. It should be noted that the thickness of the injection molded shell 3 of 0.05~0.5mm refers to the average wall thickness. In the head of the battery cell, in order to accommodate the connection structure between the circuit board 2 and the tab 11, the injection layer in the first inner cavity 31 area can be appropriately thickened locally, but the overall average thickness is still controlled within this range, so as to balance assembly space and structural strength.

[0061] In some embodiments, a first wrapping edge 341 is provided at the first opening 34, the first wrapping edge 341 abutting against the side edge of the first outer arc surface 12, and a second wrapping edge 351 is provided at the second opening 35, the second wrapping edge 351 abutting against the side edge of the first inner arc surface 13.

[0062] It should be noted that the first wrapping edge 341 and the second wrapping edge 351 extend inward from the edges of the first opening 34 and the second opening 35, respectively, and overlap and abut against the outer arc side edge and inner arc side edge of the arc-shaped battery cell 1, forming a sealing edge reinforcement on the opening end of the injection molded shell 3, and preventing moisture from seeping in due to gaps caused by the shrinkage of hot melt adhesive at the opening.

[0063] In addition, all corners of the arc-shaped battery cell 1 are rounded, which can alleviate stress concentration, improve drop impact resistance, and precisely fit the inner curved surface of the injection molded shell 3, further reducing assembly gaps and improving the overall structure's sealing and mechanical stability.

[0064] like Figure 1 and Figure 2 As shown, in this embodiment, a protective shell 5 is also included. The protective shell 5 is a semi-open arc-shaped shell. The injection-molded shell 3 is installed inside the protective shell 5 so that the outer surface of the injection-molded shell 3 is in close contact with the inner wall of the protective shell 5.

[0065] The protective shell 5 serves as the outermost mechanical protective component, primarily designed to withstand the pressure and impact during long-term wear of the ring. The shape of the protective shell 5 is determined by the shape of the injection-molded shell 3. In this embodiment, the cross-section of the injection-molded shell 3 is U-shaped, therefore the inner cross-section of the protective shell 5 is also a matching U-shape. During assembly, the protective shell 5 completely covers the outer arc surface, both sides, and the bottom surface of the injection-molded shell 3. Figure 1 As shown, a third wrapping edge 51 is provided at the head of the protective shell 5 to wrap the front end of the first inner cavity 31 of the injection molded shell 3, and sufficient space is formed between the third wrapping edges 51 to facilitate the external placement of the connector 4. This semi-open design not only ensures that the protective shell 5 effectively wraps the injection molded shell 3, but also avoids the difficulty of axial insertion and assembly required by the complete ring shell. At the same time, it can reserve operating space for the connector 4 to be led out and maintained, which facilitates the quick replacement of the battery and circuit maintenance.

[0066] It should be noted that the semi-open arc-shaped shell mentioned above refers to the shell opening 52 on one end face of the protective shell 5. This shell opening 52 can be located on the outer arc surface side or the inner arc surface side of the protective shell 5, depending on the actual needs. The shell opening 52 facilitates the assembly of the protective shell 5 with the injection-molded shell 3, and allows the inner or outer arc surface of the injection-molded shell 3 to be exposed. This not only reduces the overall thickness of the battery structure but also facilitates installation during application, such as directly bonding the injection-molded shell 3 to the smart ring based on its material properties.

[0067] Preferably, the protective case 5 is made of stainless steel, titanium, ceramic, or other materials. The material selection for the protective case 5 can be adapted to the needs of the product application scenario. Of course, the above three materials are only illustrative and can be replaced by other materials with equivalent functions.

[0068] like Figure 5 and Figure 6 As shown, where Figure 5 The left-middle image is a front view of circuit board 2. Figure 5The right figure is a back view of the circuit board 2. The circuit board 2 is provided with a connection end 21 for connecting to the tab 11 and an external connection end 22 for connecting to the connector 4. In this embodiment, the connection end 21 and the external connection end 22 are respectively located at both ends of the circuit board 2, and respectively undertake the electrical connection with the tab 11 and the electrical connection with the connector 4, so that the circuit board 2 becomes the transfer carrier between the tab 11 and the connector 4.

[0069] The aforementioned connection end 21 is used for connecting the circuit board 2 and the tab 11, while the external end 22 is the position on the circuit board 2 where it is mated with or installed on the connector 4. The two are separated on the circuit board 2 to avoid electrical interference.

[0070] Preferably, in order to increase the stability of the electrical connection between the circuit board 2 and the tab 11, this embodiment also provides a conductive element 6. The conductive element 6 serves as a transition element between the connection end 21 and the tab 11. In this embodiment, the circuit board 2 is an FPC flexible board, and the conductive element 6 is a copper strip directly led out from the connection end 21 of the circuit board 2. The other end of the conductive element 6 is soldered to the tab 11, so that the circuit board 2 is electrically connected to the tab 11 through the conductive element 6.

[0071] The external terminal 22 is the area extending outward from the other end of the circuit board 2 away from the connection terminal 21. The external terminal 22 passes through the first through hole 32 and is placed outside the injection molded shell 3, which facilitates subsequent docking and assembly with the connector 4 and avoids the connector 4 occupying the battery cell assembly space when it is located inside the injection molded shell 3.

[0072] Connector 4 is located on one side of external terminal 22, and a first reinforcing steel plate 71 is located on the other side of external terminal 22 opposite to connector 4. A flexible electrical connection is provided using an FPC flexible circuit board, adapting to the spatial orientation between the head of the arc-shaped battery cell 1 and connector 4. The first reinforcing steel plate 71, located on the opposite side of connector 4, mechanically strengthens the external terminal 22 of circuit board 2, preventing bending and damage to the external terminal 22 of circuit board 2 during assembly or disassembly.

[0073] In this embodiment, connector 4 is a terminal wire or a conductor. One end of connector 4 is directly soldered to the external terminal 22, and the other end of connector 4 is used to connect to other devices. The terminal wire or conductor solution is adapted to external lead-out connections. After being converted through circuit board 2, it leads out to the outside of the injection-molded shell 3 to interface with the smart ring or other micro-hosts. The advantage of this method is that the connection length can be flexibly adjusted to adapt to different host internal layouts.

[0074] like Figure 2As shown, in some embodiments, connector 4 can also be a BTB connector integrated on the external terminal 22. The BTB connector is directly integrated on the circuit board 2 and connects electrically with the corresponding BTB connector on the ring's main board. This method eliminates the need for external wiring, resulting in a more compact assembly. Electrical connection is achieved simply by plugging in connector 4 during assembly and disassembly, making it suitable for products that emphasize a removable and replaceable user experience.

[0075] Preferably, this embodiment also includes insulating paper 8, which covers the connection between the tab 11 and the circuit board 2. The insulating paper 8 forms an insulating barrier at the soldering point between the tab 11 and the circuit board 2, preventing accidental contact between the soldered part and adjacent metal components that could lead to a short circuit.

[0076] The welding methods described above are not limited to laser welding, resistance welding, friction welding, ultrasonic welding, riveting, etc. The conductive component 6 and the tab 11 can be welded using spiral welding, wave welding, or threaded welding. These three welding methods are all surface contact welding, which, compared to traditional spot welding, has a larger contact area, higher welding strength, and lower contact resistance, making it suitable for the low internal resistance output of the miniature arc-shaped battery cell 1. Figures 7 to 9 As shown, the weld points of spiral welding are distributed in a spiral shape; the weld points of wave welding are continuous wavy; and the weld seam of threaded welding is threaded. The three methods can be selected according to the geometric characteristics of each component. In this embodiment, spiral welding is preferred, while wave welding and threaded welding are equivalent replacement methods. The process principle is similar to the mechanical self-locking effect, and only the weld seam morphology is different.

[0077] Example 2

[0078] The difference between this embodiment and Embodiment 1 is that the conductive component 6 in this embodiment is a nickel sheet. Using a nickel sheet as the conductive component 6 provides good conductivity and corrosion resistance, and it is easy to solder to the tab 11 and the circuit board 2. The nickel sheet thickness is preferably 0.1mm to 0.3mm, which ensures current carrying capacity while facilitating bending and shaping. One end of the nickel sheet is soldered to the tab 11, and the other end is soldered to the connection end 21 of the circuit board 2, forming a stable electrical connection path.

[0079] Preferably, the nickel sheet surface can be plated with gold or silver to further improve conductivity and oxidation resistance. Everything else is the same as in Example 1, achieving the same technical effects.

[0080] Example 3

[0081] The difference between this embodiment and Embodiment 1 is that, as Figure 10 and Figure 12As shown, in this embodiment, the connecting end 21 is located on one side of the circuit board 2, and the external end 22 is located on the other side of the circuit board 2 opposite to the connecting end 21. At this time, the circuit board 2 in this embodiment is completely placed inside the first inner cavity 31 and no longer extends out of the injection molded shell 3. Preferably, the circuit board 2 in this embodiment is a rigid circuit board, and the connector 4 is a pogo pin connector or gold finger. The connector 4 is installed on the external end 22. Two first through holes 32 are provided on the injection molded shell 3. The two first through holes 32 are located on the head of the injection molded shell 3 and are located directly above the connector 4.

[0082] It should be noted that, taking the gold fingers as an example, two gold fingers are set on the external terminal 22, corresponding to the positive and negative terminals of the power supply respectively. Similarly, in this embodiment, the two first through holes 32 are set on the inner arc surface of the head of the injection molded shell 3, corresponding to the two sets of gold finger contacts respectively, so that the gold fingers are exposed through the first through holes 32, which facilitates reliable contact with the corresponding spring contacts of the external host.

[0083] Furthermore, the positions of the two first through holes 32 can be adjusted according to actual needs. For example, the two first through holes 32 can be set at the front end of the head of the injection molded shell 3, or on the outer arc surface of the head of the injection molded shell 3, and the position of the connector 4 on the corresponding circuit board 2 can be adapted accordingly.

[0084] Of course, a protective shell 5 can also be set. The protective shell 5 is also provided with a second through hole corresponding to the first through hole 32 to protect the gold finger from being exposed. Everything else is the same as in Embodiment 1, and the technical effect of Embodiment 1 is achieved at the same time.

[0085] Example 4

[0086] The difference between this embodiment and Embodiment 1 is that, as Figures 13 to 15 As shown, the structure of the conductive element 6 is further optimized in this embodiment to improve the connection stability with the tab 11. Specifically, in this embodiment, the tab 11 is bent to form a C-shaped structure. One end of the conductive element 6 is welded to the connection end 21, and the other end of the conductive element 6 is bent to form a C-shaped structure. The conductive element 6 and the tab 11 are inserted into each other to form a compact stacked combination and then welded together. The circuit board 2 is electrically connected to the tab 11 through the conductive element 6, and the insulating paper 8 covers the connection between the tab 11 and the conductive element 6.

[0087] The aforementioned opposing insertion refers to the C-shaped opening direction of the tab 11 being opposite to that of the C-shaped opening of the conductive component 6. The two openings interlock, allowing the C-shaped portion of the tab 11 to embed into the C-shaped portion of the conductive component 6, and vice versa, forming a layered assembly before welding. This structure utilizes the C-shaped bending of the tab 11 and the conductive component 6 to create elastic pre-tightening, temporarily fixing their relative positions before welding. This facilitates automated welding operations. Furthermore, the opposing insertion method increases the contact area, resulting in superior welding strength and conductivity compared to other planar butt joints. Simultaneously, the thickness is controllable, effectively meeting the structural space requirements of ultra-thin wearable devices.

[0088] Preferably, a second reinforcing member 72 is provided at the welding position between the conductive member 6 and the connecting end 21, and the second reinforcing member 72 completely covers the connection between the conductive member 6 and the connecting end 21. The second reinforcing member 72 further enhances the mechanical protection capability of the connection, preventing the weld from cracking due to bending or vibration.

[0089] Of course, this embodiment 4 can also be used in combination with the methods of embodiments 2 and 3, such as integrating the conductive component 6 structure with the circuit board 2 or using an external gold finger connection method. This further improves modular assembly efficiency and long-term electrical stability while maintaining the ultra-thin characteristics, providing dual protection for the durability and signal integrity of wearable devices in high-frequency plugging and unplugging scenarios. Everything else is the same as in embodiment 1, achieving the technical effects of embodiment 1.

[0090] 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 replaceable smart ring battery structure, characterized in that, It includes an arc-shaped battery cell (1), a circuit board (2), an injection-molded housing (3), and a connector (4); The head of the arc-shaped battery cell (1) has a tab (11) leading out; the circuit board (2) is installed on the head of the arc-shaped battery cell (1), and one end of the circuit board (2) is connected to the tab (11), and the other end of the circuit board (2) is connected to the connector (4). The injection-molded housing (3) is integrally molded using hot melt adhesive material under low pressure and low temperature, so that the arc-shaped battery cell (1) is completely wrapped inside the injection-molded housing (3). The head of the injection-molded housing (3) is provided with a first inner cavity (31) for accommodating the circuit board (2) and the tab (11) and at least one first through hole (32) communicating with the first inner cavity (31). The connector (4) is connected to an external device through the first through hole (32). Among them, the temperature of the low-pressure low-temperature injection molding is controlled at 80℃~120℃, and the injection pressure is controlled at 0.3MPa~1.5MPa.

2. The replaceable smart ring battery structure according to claim 1, characterized in that, The arc-shaped battery cell (1) includes a first outer arc surface (12), a first inner arc surface (13), two first side surfaces (14) and a first bottom surface (15). The injection-molded shell (3) is also provided with a second inner cavity (33) communicating with the first inner cavity (31). The upper end and lower end of the injection-molded shell (3) are respectively provided with a first opening (34) and a second opening (35) communicating with the second inner cavity (33). The arc-shaped battery cell (1) is installed in the second inner cavity (33) so that the two first side surfaces (14) and the first bottom surface (15) abut against the inner wall of the second inner cavity (33).

3. The replaceable smart ring battery structure according to claim 2, characterized in that, A first wrapping edge (341) is provided at the first opening (34), which abuts against the side edge of the first outer arc surface (12). A second wrapping edge (351) is provided at the second opening (35), which abuts against the side edge of the first inner arc surface (13).

4. The replaceable smart ring battery structure according to claim 2, characterized in that, It also includes a protective shell (5), which is a semi-open arc-shaped shell. The injection-molded shell (3) is installed inside the protective shell (5) so that the outer surface of the injection-molded shell (3) is in close contact with the inner wall of the protective shell (5).

5. The replaceable smart ring battery structure according to claim 4, characterized in that, The protective shell (5) is made of stainless steel, titanium or ceramic.

6. The replaceable smart ring battery structure according to claim 1, characterized in that, The circuit board (2) is provided with a connection end (21) for connecting to the tab (11) and an external end (22) for connecting to the connector (4).

7. The replaceable smart ring battery structure according to claim 6, characterized in that, The circuit board (2) is an FPC flexible board.

8. The replaceable smart ring battery structure according to claim 7, characterized in that, The external terminal (22) is the area extending outward from the other end of the circuit board (2) away from the connection terminal (21), and the external terminal (22) passes through the first through hole (32) and is placed outside the injection molded shell (3).

9. The replaceable smart ring battery structure according to claim 8, characterized in that, The connector (4) is disposed on one side of the external end (22), and a first reinforcing steel plate (71) is disposed on the other side of the external end (22) opposite to the connector (4).

10. The replaceable smart ring battery structure according to claim 9, characterized in that, The connector (4) is a terminal wire, wire or BTB connector. One end of the connector (4) is directly connected to the external terminal (22), and the other end of the connector (4) is used to connect to other devices.

11. The replaceable smart ring battery structure according to claim 6, characterized in that, The connecting end (21) is located on one side of the circuit board (2), and the external end (22) is located on the other side of the circuit board (2) opposite to the connecting end (21). The connector (4) is a pogopin connector or a gold finger. The connector (4) is installed on the external end (22). Two first through holes (32) are provided on the injection molded shell (3). The two first through holes (32) are located at the head of the injection molded shell (3) and are positioned directly above the connector (4).

12. The replaceable smart ring battery structure according to claim 6, characterized in that, It also includes a conductive element (6), which is a nickel sheet or a copper sheet directly led out from the circuit board (2), and the circuit board (2) is electrically connected to the tab (11) via the conductive element (6).

13. The replaceable smart ring battery structure according to claim 12, characterized in that, One end of the conductive element (6) is directly led out from the connection end (21), and the other end of the conductive element (6) is directly welded to the tab (11).

14. The replaceable smart ring battery structure according to claim 12, characterized in that, One end of the conductive element (6) is welded to the connecting end (21), and the other end of the conductive element (6) is bent to form a C-shaped structure. The tab (11) is bent to form a C-shaped structure. The conductive element (6) and the tab (11) are inserted into each other along opposite directions to form a compact stacked combination and then welded together.

15. A replaceable smart ring battery structure according to claim 13 or 14, characterized in that, The conductive element (6) and the tab (11) are connected by spiral welding, wave welding or thread welding.

16. A replaceable smart ring battery structure according to claim 13 or 14, characterized in that, A second reinforcing member (72) is also provided at the welding position between the conductive member (6) and the connecting end (21), and the second reinforcing member (72) completely covers the connection between the conductive member (6) and the connecting end (21).

17. The replaceable smart ring battery structure according to claim 1, characterized in that, It also includes insulating paper (8) that covers the connection between the tab (11) and the circuit board (2).

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