A waterproof battery

Abstract

The application provides a waterproof battery, which comprises a cover, a bottom shell, a battery cell, a circuit board, a positive electrode connecting piece and a negative electrode connecting piece. The battery cell and the circuit board are accommodated in the bottom shell. The positive electrode connecting piece and the negative electrode connecting piece are respectively injection molded on the cover. The cover is sealingly connected with the bottom shell. The circuit board is electrically connected with the battery cell. The circuit board is provided with a positive electrode metal interface and a negative electrode metal interface. One end of the positive electrode connecting piece is inserted into and electrically connected with the positive electrode metal interface. One end of the negative electrode connecting piece is inserted into and electrically connected with the negative electrode metal interface. The other end of the positive electrode connecting piece and the other end of the negative electrode connecting piece are respectively exposed outside the cover. The positive electrode connecting piece and the negative electrode connecting piece are sealingly connected with the cover by injection molding. One end of the positive electrode connecting piece and the negative electrode connecting piece is inserted into and electrically connected with the positive electrode metal interface and the negative electrode metal interface of the circuit board. The electrical connection between the positive electrode and the negative electrode and the circuit board can be simultaneously satisfied. The relative limiting between the positive electrode connecting piece, the negative electrode connecting piece and the circuit board can be simultaneously realized.

Description

Technical Field

[0001] This invention relates to the technical field of battery modules, and in particular to a waterproof battery. Background Technology

[0002] In modern life, where electronic devices are increasingly prevalent, waterproof batteries, as key energy components, are widely used in complex environments such as outdoor sports, industrial manufacturing, medical equipment, and marine exploration. These environments often involve harsh conditions such as high humidity, dust, exposure to corrosive chemicals, or direct liquid contact, posing significant challenges to the long-term stability and safety of batteries. The core function of waterproof batteries is to ensure a continuous and reliable power supply, preventing performance degradation or functional failure due to environmental factors. The electrical connection interface, as the hub for energy transfer between the battery and external devices, directly determines the reliability of the entire battery system due to its waterproof performance. In actual operation, the interface area is highly susceptible to the intrusion of moisture, dust, or corrosive substances. Once leakage occurs, it can lead to serious consequences such as internal circuit short circuits, cell corrosion, increased contact resistance, and even thermal runaway, not only shortening battery life but also potentially triggering safety hazards. Simultaneously, the electrical connection between the interface and the battery's internal protection board must remain highly stable to withstand mechanical stress caused by equipment vibration, frequent plugging and unplugging, or temperature changes, preventing signal interruption or power fluctuations caused by loose connections. In existing technologies, common waterproofing solutions such as rubber sealing rings, potting compounds, or mechanical locking structures rely too heavily on physical sealing, often sacrificing the ease of interface operation and increasing the difficulty of use for users; while designs that enhance connection stability often weaken the waterproofing effect, making it difficult to achieve synergistic optimization of both. Summary of the Invention

[0003] The object of this invention is to provide a waterproof battery to solve at least some of the problems described above.

[0004] This invention provides a waterproof battery, including a cover, a bottom shell, a battery cell, a circuit board, a positive electrode connector, and a negative electrode connector. The battery cell and the circuit board are both housed within the bottom shell. The positive electrode connector and the negative electrode connector are respectively injection molded onto the cover, and the cover is sealed to the bottom shell. The circuit board is electrically connected to the battery cell and has a positive electrode metal interface and a negative electrode metal interface. One end of the positive electrode connector is inserted into and electrically connected to the positive electrode metal interface, and one end of the negative electrode connector is inserted into and electrically connected to the negative electrode metal interface. The other ends of the positive and negative electrode connectors protrude from the cover.

[0005] Furthermore, the positive electrode connector includes a plurality of positive electrode metal rods, each positive electrode metal rod including an injection molding part, a positioning part, and an insertion part. The injection molding part is injection molded inside the cover. One end of the injection molding part is used to electrically connect to the positive electrode of an external device. The other end of the injection molding part is connected to one end of the positioning part. The other end of the positioning part is connected to one end of the insertion part. The other end of the insertion part is inserted into the positive electrode metal interface.

[0006] Furthermore, the outer diameter of the positioning part is larger than the outer diameter of the insertion part, so that when the insertion part is inserted into the positive metal interface, the positioning part abuts against the positive metal interface to position the circuit board.

[0007] Furthermore, the negative electrode connector includes a negative electrode positioning component, a negative electrode sheet, and a negative electrode fastener. The negative electrode positioning component is injection molded into the cover. The negative electrode sheet has a fastening hole. The negative electrode positioning component has a blind hole. The negative electrode fastener passes through the fastening hole in sequence and is positioned in the blind hole to position the negative electrode sheet to the cover.

[0008] Furthermore, one end of the negative electrode positioning component is injection molded inside the cover, and the other end of the negative electrode positioning component is provided with an opening for holding the other end of the negative electrode positioning component against the negative electrode metal interface.

[0009] Furthermore, the cover is provided with a negative electrode mounting seat and a positive electrode mounting seat. The negative electrode mounting seat is symmetrically arranged on both sides of the positive electrode mounting seat with the positive electrode mounting seat as the center. The negative electrode sheet is disposed on the negative electrode mounting seat. The top end of the injection molded part extends out of the positive electrode mounting seat. A screw groove for screwing in the negative electrode of an external device is formed between the negative electrode mounting seat, the negative electrode sheet and the cover.

[0010] Furthermore, the negative electrode includes a mounting portion, an inclined portion, and a transition portion. The mounting portion is connected to the negative electrode mounting base through the fastening hole. The inclined portion is inclined to the cover. The transition portion is located between the mounting portion and the inclined portion. The height of the end of the inclined surface of the inclined portion near the opening of the screw-in groove from the surface of the cover is greater than the height of the end of the inclined surface away from the opening of the screw-in groove from the surface of the cover. This is used to screw the negative electrode of the external device into the screw-in groove and fit it against the negative electrode.

[0011] Furthermore, the positive electrode mounting base is a circular base protruding from the outer surface of the cover, and the top end of the injection-molded part is recessed into the circular base to accommodate the retractable positive electrode of an external device.

[0012] Furthermore, the bottom shell is provided with an ultrasonic groove, and the top cover is provided with an ultrasonic boss. The width of the ultrasonic boss is wider than the width of the ultrasonic groove, so that the ultrasonic boss is inserted into the ultrasonic groove with an interference fit, thereby achieving a sealed connection between the top cover and the bottom shell.

[0013] Furthermore, the cover also includes a first electromagnetic interference resistant portion circumferentially disposed on the inner side of the ultrasonic protrusion. The first electromagnetic interference resistant portion has a first inclined surface extending toward the ultrasonic groove. The bottom shell also includes a second electromagnetic interference resistant portion circumferentially disposed on the inner side of the ultrasonic groove. The second electromagnetic interference resistant portion does not have a second inclined surface extending toward the ultrasonic protrusion. A bent channel is formed between the first inclined surface and the second inclined surface to block the transmission of electromagnetic waves.

[0014] The beneficial effects of this plan are as follows: By separately injection molding the positive and negative connectors onto the cover, a highly sealed connection between the positive and negative connectors and the cover is achieved. One end of each connector is inserted into and electrically connected to the positive and negative metal interfaces on the circuit board, simultaneously ensuring electrical connection between the positive and negative terminals and the circuit board, while also providing relative positioning between the connectors and the circuit board. The cover and bottom shell are then sealed together. This effectively solves the waterproofing problem of electrical connection interfaces in traditional waterproof batteries operating in humid, dusty, and corrosive environments, and improves the connection stability between the electrical connection interfaces and the internal circuit board of the battery, thus ensuring stable and safe power supply from the battery in complex environments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a waterproof battery; Figure 2 This is a cross-sectional view of a waterproof battery. Figure 3 for Figure 2 A magnified view of a portion of circle A in the center; Figure 4 This is a schematic diagram of the exploded structure of a waterproof battery; Figure 5 This is a schematic diagram of the first angle structure of the faceplate. Figure 6 This is a schematic diagram of the second angle structure of the faceplate. Figure 7 This is a cross-sectional view of the cover; Figure 8 This is a schematic diagram of the exploded structure of the faceplate; Figure 9 This is a schematic diagram of the battery holder structure; Figure 10 This is a schematic diagram of the bottom shell structure.

[0016] Explanation of reference numerals in the attached figures: 10. Faceplate; 11. Ultrasonic boss; 111. Pointed head; 12. First anti-electromagnetic interference part; 13. Negative electrode mounting base; 14. Positive electrode mounting base; 20. Bottom shell; 21. Ultrasonic groove; 22. Second anti-electromagnetic interference part; 23. Elastic button part; 24. First positioning groove; 25. Positioning base; 30. Battery cell; 31. Core battery; 32. Conductive sheet; 40. Positive electrode connector; 401. Positive electrode metal rod; 41. Injection molding part; 42. Positioning part; 43. Insertion part; 50. Negative electrode connector Components; 51. Negative electrode positioning component; 511. Blind hole; 512. Opening; 52. Negative electrode sheet; 521. Fastening hole; 522. Mounting part; 523. Inclined part; 524. Transition part; 53. Negative electrode fastener; 60. Circuit board; 61. Electromagnetic interference test button; 62. Waterproof adhesive layer; 63. Positive electrode metal interface; 64. Negative electrode metal interface; 70. Battery bracket; 71. Second positioning groove; 72. Positioning sleeve; 81. First conductive foam; 82. Second conductive foam; 83. Buffer foam. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0018] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly, for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or they can refer to the internal communication of two components. For those skilled in the art, the specific meaning of the terms in this invention can be understood according to the specific circumstances.

[0019] See Figure 1-10This embodiment discloses a waterproof battery, including a cover 10, a bottom shell 20, a battery cell 30, a circuit board 60, a positive electrode connector 40, and a negative electrode connector 50. The battery cell 30 and the circuit board 60 are both housed within the bottom shell 20. The positive electrode connector 40 and the negative electrode connector 50 are respectively injection molded onto the cover 10, and the cover 10 and the bottom shell 20 are sealed together. The circuit board 60 is electrically connected to the battery cell 30. The circuit board 60 is provided with a positive electrode metal interface 63 and a negative electrode metal interface 64. One end of the positive electrode connector 40 is inserted into and electrically connected to the positive electrode metal interface 63, and one end of the negative electrode connector 50 is inserted into and electrically connected to the negative electrode metal interface 64. The other ends of the positive electrode connector 40 and the other ends of the negative electrode connector 50 are respectively exposed outside the cover 10.

[0020] The positive electrode connector 40 and the negative electrode connector 50 can be prefabricated as metal parts with specific shapes, and then placed in the injection mold of the face cover 10, and the face cover 10 material is used to cover and fix them through the injection molding process.

[0021] In this embodiment, the waterproof battery achieves a highly sealed connection between the positive electrode connector 40 and the negative electrode connector 50 and the cover 10 by injection molding the positive electrode connector 40 and the negative electrode connector 50 onto the cover 10. One end of the positive electrode connector 40 and the negative electrode connector 50 is inserted into and electrically connected to the positive electrode metal interface 63 and the negative electrode metal interface 64 of the circuit board 60, simultaneously satisfying the electrical connection between the positive and negative electrodes and the circuit board 60, while also achieving relative positioning between the positive electrode connector 40, the negative electrode connector 50, and the circuit board 60. The cover 10 and the bottom shell 20 are sealed together. This effectively solves the waterproofing problem of electrical connection interfaces in traditional waterproof batteries in humid, dusty, and corrosive environments, and improves the connection stability between the electrical connection interfaces and the internal circuit board 60 of the battery, thereby ensuring stable and safe power supply from the battery in complex environments.

[0022] In this embodiment, the positive electrode connector 40 includes a plurality of positive electrode metal rods 401. Each positive electrode metal rod 401 includes an injection molding part 41, a positioning part 42, and an insertion part 43. The injection molding part 41 is injection molded into the faceplate 10. One end of the injection molding part 41 is used to electrically connect to the positive electrode of an external device. The other end of the injection molding part 41 is connected to one end of the positioning part 42. The other end of the positioning part 42 is connected to one end of the insertion part 43. The other end of the insertion part 43 is inserted into the positive electrode metal interface 63.

[0023] In this design, the positive electrode metal rod 401 consists of three parts: the injection molding part 41, the positioning part 42, and the insertion part 43, all integrally molded. This segmented structure allows each part to be optimized for its specific functional requirements, ensuring electrical connection performance while also balancing ease of fixing, positioning, and assembly. The injection molding part 41 is crucial for the mechanical fixing and sealing of the positive electrode metal rod 401 and the cover 10. By directly injection molding the part 41 into the material of the cover 10, an integrated structure is formed, ensuring the firm fixation of the positive electrode metal rod 401 to the cover 10 and effectively preventing moisture from seeping into the battery from the joint between the connector and the cover 10, thus enhancing the battery's waterproof performance. The injection molding material is typically an engineering plastic compatible with the material of the cover 10 and possessing good insulation and sealing properties. The connection between the positioning part 42 and the insertion part 43 is an important component of the internal structure of the positive electrode metal rod 401, effectively combining the positioning and insertion functions. This connection method ensures the accurate orientation and position of the insertion part 43 when it is inserted into the positive metal interface 63, and provides a structural basis for subsequent positioning functions.

[0024] Furthermore, the outer diameter of the positioning part 42 is larger than the outer diameter of the insertion part 43, which is used to position the circuit board 60 by abutting the positive metal interface 63 when the insertion part 43 is inserted into the positive metal interface 63. Utilizing the difference in outer diameter between the positioning part 42 and the insertion part 43, the positioning part 42 can reliably abut the positive metal interface 63 when the insertion part 43 is electrically connected to it. This abutting action effectively fixes the circuit board 60 axially in a predetermined position, greatly improving the positioning accuracy and stability of the circuit board 60 inside the battery. This not only ensures the long-term reliability of the electrical connection between the positive connector 40 and the positive metal interface 63, avoiding the risk of poor contact or open circuit due to displacement of the circuit board 60, but also simplifies the battery assembly process and improves production efficiency and product consistency.

[0025] In this embodiment, the negative electrode connector 50 includes a negative electrode positioning component 51, a negative electrode sheet 52, and a negative electrode fastener 53. The negative electrode positioning component 51 is injection molded into the cover 10. The negative electrode sheet 52 is provided with a fastening hole 521. The negative electrode positioning component 51 is provided with a blind hole 511. The negative electrode fastener 53 passes through the fastening hole 521 in sequence and is positioned in the blind hole 511 to position the negative electrode sheet 52 to the cover 10.

[0026] The negative electrode positioning component 51 has an internal thread structure in its blind hole 511, and the negative electrode fastener 53 is a fastening screw. The negative electrode sheet 52 engages with the negative electrode fastener 53 through the fastening hole 521, and is positioned within the blind hole 511 of the negative electrode positioning component 51 by the negative electrode fastener 53, thus achieving precise and stable fixation of the negative electrode sheet 52 on the cover 10. This fixing method effectively avoids loosening, displacement, or poor contact of the negative electrode sheet 52 during battery use due to vibration, impact, or external insertion and extraction forces, ensuring the long-term reliability and stability of the electrical connection between the battery and external devices. Simultaneously, the injection molding of the negative electrode positioning component 51 and the cover 10 as a single unit further enhances the overall structural strength and waterproof performance of the battery, improving the product's durability and safety.

[0027] In this embodiment, one end of the negative electrode positioning member 51 is injection molded into the faceplate 10, and the other end of the negative electrode positioning member 51 is provided with an opening 512 for holding the other end of the negative electrode positioning member 51 against the negative electrode metal interface 64.

[0028] The other end of the negative electrode positioning component 51 is interference-fitted and abuts against the negative electrode metal interface 64, achieving reliable mechanical fixation and stable electrical connection between the negative electrode positioning component 51 and the circuit board 60. The tight contact force generated by this interference fit not only effectively prevents the connector from loosening or falling off, ensuring the stability of current transmission, but also, due to its close fit, enhances the electrical connection stability between the negative electrode positioning component 51 and the circuit board 60 to a certain extent. This connection method simplifies the assembly process, improves production efficiency, and reduces the need for additional fasteners.

[0029] In this embodiment, the cover 10 is provided with a negative electrode mounting seat 13 and a positive electrode mounting seat 14. The negative electrode mounting seat 13 is symmetrically arranged on both sides of the positive electrode mounting seat 14 with the positive electrode mounting seat 14 as the center. The negative electrode sheet 52 is disposed on the negative electrode mounting seat 13. The top end of the injection molding part 41 extends out of the positive electrode mounting seat 14. A screw groove for screwing in the negative electrode of an external device is formed between the negative electrode mounting seat 13, the negative electrode sheet 52 and the cover 10.

[0030] Through the above technical solution, the positive electrode mounting base 14 and negative electrode mounting base 13 provided on the cover 10 provide a clear and stable interface for electrical connection of external devices. The negative electrode mounting base 13 is symmetrically arranged with the positive electrode mounting base 14 as the center, making the connection layout more reasonable and user-friendly, and easy for users to identify and operate. The negative electrode piece 52 is reliably set on the negative electrode mounting base 13, ensuring its stability during the connection process. The top of the injection-molded part 41 of the positive electrode metal rod 401 of the positive electrode connector 40 extends out of the positive electrode mounting base 14, ensuring effective contact with the positive electrode of the external device. More importantly, the screw-in groove formed between the negative electrode mounting base 13, the negative electrode piece 52, and the cover 10 provides a screw-in connection method for the negative electrode connection of the external device. This screw-in connection can provide stronger mechanical fixing force, effectively preventing the external device from falling off under vibration or accidental pulling, and significantly improving the reliability and stability of the connection. At the same time, the tight fit of the screw-in connection also helps to enhance the sealing of the connection, further improving the overall waterproof performance of the waterproof battery.

[0031] In this embodiment, the negative electrode 52 includes a mounting portion 522, an inclined portion 523, and a transition portion 524. The mounting portion 522 is connected to the negative electrode mounting base 13 through a fastening hole 521. The inclined portion 523 is inclined to the face cover 10. The transition portion 524 is located between the mounting portion 522 and the inclined portion 523. The height of the inclined surface of the inclined portion 523 near the opening of the screw groove from the surface of the face cover 10 is greater than the height of the inclined surface away from the opening of the screw groove from the surface of the face cover 10. This is used to screw the negative electrode of the external device into the screw groove and fit it against the negative electrode 52.

[0032] "The end near the opening of the screw-in slot" refers to the inclined surface at the entrance of the screw-in slot, while "the end away from the opening of the screw-in slot" refers to the inclined surface at the depth of the screw-in slot. This height difference means that the inclined surface gradually decreases towards the interior of the screw-in slot. When the negative terminal of the external device is screwed in, it contacts both the transition portion 524 and the inclined portion 523. Due to the geometry of the inclined surface, a pushing or guiding force is generated towards the deeper part of the screw-in slot or towards the center of the screw-in slot. This structure ensures that the negative terminal of the external device is guided to a more stable position during screwing in. At the same time, the transition portion 524 near the depth of the screw-in slot forms a positioning space for the negative terminal of the external device, thereby increasing its fixation effect within the screw-in slot.

[0033] During the screwing process, the inclined surface exerts a guiding and pressing force on the negative terminal of the external device, either towards the inside or radially of the screw-in slot. This force not only ensures that the negative terminal of the external device is more effectively guided to the bottom or center of the screw-in slot, forming a tighter electrical contact, but also provides a certain degree of self-locking or anti-detachment effect. Even when the external device is subjected to vibration or impact, the additional radial or axial force provided by the inclined surface effectively resists the tendency of the negative terminal to loosen or detach from the screw-in slot, thereby significantly improving the reliability and stability of the electrical connection between the battery and the external device, and avoiding connection interruption problems caused by accidental detachment.

[0034] In this embodiment, the positive electrode mounting base 14 is a circular base protruding from the outer surface of the cover 10, and the top end of the injection-molded part 41 is recessed into the circular base to accommodate the retractable positive electrode of the external device.

[0035] The circular socket's geometry offers excellent symmetry, contributing to uniform support and guidance during connection. The retractable positive terminal typically features a spring-loaded mechanism that extends to contact the battery's positive terminal during connection and retracts upon disconnection. When the external device's positive terminal extends, the circular socket's raised structure acts as a guide, helping to accurately align it with the battery's recessed positive contact point. Once the terminal enters the recessed area, the circular socket's edges provide lateral support and restraint, preventing the connector from shifting or wobbling under stress. Simultaneously, the recessed design allows the retractable terminal to fully extend and compress, ensuring a stable and reliable electrical contact.

[0036] In this embodiment, the bottom shell 20 is provided with an ultrasonic groove 21, and the top cover 10 is provided with an ultrasonic boss 11. The width of the ultrasonic boss 11 is wider than the width of the ultrasonic groove 21, so that the ultrasonic boss 11 is inserted into the ultrasonic groove 21 with an interference fit, thereby achieving a sealed connection between the top cover 10 and the bottom shell 20.

[0037] The width of the ultrasonic boss 11 is designed to be wider than the width of the ultrasonic groove 21. This design ensures an interference fit when the ultrasonic boss 11 is inserted into the ultrasonic groove 21. Thus, a preload is generated between the ultrasonic boss 11 and the ultrasonic groove 21 before ultrasonic welding, producing a preliminary mechanical seal effect. For example, the width of the ultrasonic boss 11 can be 0.1 mm to 0.3 mm larger than the width of the ultrasonic groove 21 to ensure sufficient interference during insertion.

[0038] According to actual requirements, the ultrasonic boss 11 can be set on the bottom shell 20, and the ultrasonic groove 21 can be set on the face cover 10.

[0039] The waterproof battery of this embodiment forms a pre-tight seal before ultrasonic welding by using the interference fit design of the ultrasonic boss 11 and the ultrasonic groove 21. During the subsequent ultrasonic welding process, it ensures close contact and uniform melting of the welding area, thereby significantly enhancing the overall waterproof capability of the battery, enabling it to meet high waterproof standards and broadening the application range of the battery.

[0040] In one embodiment, the ultrasonic boss 11 is provided with a pointed head 111, which extends toward the bottom of the ultrasonic groove 21, and the tip of the pointed head 111 is press-fitted against the bottom of the ultrasonic groove 21.

[0041] The pointed tip 111 is part of the ultrasonic boss 11 and has one or more sharp ends. It is designed to concentrate ultrasonic energy to the contact area during ultrasonic welding, thereby promoting rapid melting and flow of the material. The pointed tip 111 is provided on the ultrasonic boss 11, with its tip press-fitting against the bottom of the ultrasonic groove 21. During ultrasonic welding, the pointed tip 111 can concentrate ultrasonic energy to the bottom area of ​​the ultrasonic groove 21. This energy concentration allows the bottom material to melt and flow more quickly and fully, ensuring a uniform and dense weld seam throughout the depth of the ultrasonic groove 21, especially at the bottom. This effectively solves the problems of insufficient melting and weak sealing at the bottom of the groove that may exist in traditional ultrasonic welding, significantly improving the reliability and waterproof performance of the sealing connection between the cover 10 and the bottom shell 20.

[0042] In one embodiment, the cover 10 further includes a first electromagnetic interference resistant portion 12 circumferentially disposed inside the ultrasonic protrusion 11. The first electromagnetic interference resistant portion 12 has a first inclined surface extending in the direction of the ultrasonic groove 21. The bottom shell 20 further includes a second electromagnetic interference resistant portion 22 circumferentially disposed inside the ultrasonic groove 21. The second electromagnetic interference resistant portion 22 has a second inclined surface extending in the direction of the ultrasonic protrusion 11. A bent channel is formed between the first inclined surface and the second inclined surface to block the transmission of electromagnetic waves.

[0043] The bend in the channel is a non-linear path formed by the interaction of the first and second inclined surfaces. After the cover 10 and the bottom shell 20 are ultrasonically welded together, the first and second inclined surfaces fit tightly together, forming a tortuous and circuitous channel at the contact gap. For electromagnetic waves to penetrate the joint area between the cover 10 and the bottom shell 20, they must propagate along this bend in the channel. Because the electromagnetic waves undergo multiple reflections and refractions within the bend in the channel, their energy is significantly attenuated during this process, effectively hindering the transmission of electromagnetic waves.

[0044] This solution introduces a first electromagnetic interference suppression unit 12 and a second electromagnetic interference suppression unit 22, which can effectively shield external electromagnetic interference from affecting the battery cell 30 and circuit board 60 inside the battery, and also suppress the leakage of electromagnetic radiation generated inside, greatly improving the electromagnetic compatibility of the waterproof battery, ensuring the stable and reliable operation of the battery system in complex electromagnetic environments, and thus guaranteeing the performance and reliability of the entire electronic device.

[0045] In one embodiment, the circuit board 60 is provided with an electromagnetic interference test button 61, and the bottom shell 20 is provided with a resilient button part 23 adapted to the electromagnetic interference test button 61, and a waterproof adhesive layer 62 is attached to the surface of the resilient button part 23.

[0046] Electromagnetic interference test button 61 is provided on circuit board 60. Its function is to provide an externally triggerable interface for starting or executing electromagnetic interference (EMI) test programs or functions on circuit board 60.

[0047] An electromagnetic interference (EMI) test button 61 is provided on the circuit board 60 of the waterproof battery, and a corresponding elastic button part 23 is provided on the bottom shell 20. A waterproof adhesive layer 62 is attached to the surface of the elastic button part 23, which allows for convenient EMI performance testing without damaging the waterproof structure after the battery is sealed and assembled. This design significantly improves the testing efficiency and convenience of waterproof batteries in the production and quality inspection stages, while ensuring the waterproof reliability and EMI compatibility of the product throughout its entire life cycle, providing users with a more stable and safer user experience.

[0048] In one embodiment, the electrical connection component is injection molded onto the cover 10, and one end of the electrical connection component is electrically connected to the circuit board 60, while the other end of the electrical connection component protrudes outside the cover 10.

[0049] During the manufacturing process of the faceplate 10, the electrical connection components are directly and integrally bonded to the faceplate 10 material through injection molding. The electrical connection components are pre-placed in the mold of the faceplate 10, and then molten plastic or other faceplate 10 material is injected into the mold, allowing it to solidify and firmly encapsulate the electrical connection components inside the faceplate 10. This process ensures a tight and seamless bond between the electrical connection components and the faceplate 10, effectively eliminating interface gaps that may occur with traditional assembly methods.

[0050] This integrated molding method not only enhances the mechanical strength and vibration resistance of the joint, reducing the risk of seal failure due to long-term use or external impact, but also simplifies the assembly process and reduces the need for additional seals, thereby improving production efficiency and product reliability. Ultimately, this ensures that the waterproof battery maintains excellent waterproof performance in various harsh environments, extending the product's lifespan.

[0051] In one embodiment, the waterproof battery further includes a battery bracket 70, which is positioned on the bottom shell 20. The battery cell 30 is disposed between the lower surface of the battery bracket 70 and the bottom shell 20, and the circuit board 60 is positioned on the upper surface of the battery bracket 70.

[0052] The battery cell 30 and circuit board 60 are respectively located on the upper and lower surfaces of the battery bracket 70, ensuring a reliable electrical connection between the battery cell 30 and the circuit board 60. This avoids connection failure or short circuit risks caused by battery cell 30 movement and significantly improves the overall structural stability and impact resistance of the battery. In waterproof battery applications, the stable fixation of the battery cell 30 further reduces the potential stress of internal components on the sealing structure, thereby indirectly enhancing the reliability of waterproof performance and extending battery life.

[0053] In one embodiment, the battery cell 30 includes multiple wound-core batteries 31. The bottom surface of the bottom shell 20 is provided with a first positioning groove 24 adapted to the wound-core batteries 31, and the battery holder 70 is provided with a second positioning groove 71 adapted to the wound-core batteries 31. The multiple wound-core batteries 31 are positioned between the first positioning groove 24 and the second positioning groove 71. By designing the battery cell 30 as multiple wound-core batteries 31 and utilizing the first positioning groove 24 adapted to the wound-core batteries 31 on the bottom surface of the bottom shell 20 and the second positioning groove 71 adapted to the wound-core batteries 31 on the battery holder 70, precise and secure positioning of each wound-core battery 31 is achieved. The multiple wound-core batteries 31 are stably clamped between the first positioning groove 24 and the second positioning groove 71, effectively solving the problem of possible shaking and displacement of a single battery cell within the positioning cavity.

[0054] In one embodiment, the cell 30 further includes a conductive sheet 32 ​​and an insulating sheet (not shown). The conductive sheet 32 ​​is used to electrically connect the plurality of wound cells 31 to the circuit board 60, and the insulating sheet is disposed between the plurality of conductive sheets 32 and the circuit board 60.

[0055] This structure not only simplifies the assembly process of the multi-core battery 31, but also improves the overall battery's anti-interference ability and long-term operational stability. In particular, within the compact space of the waterproof battery, it ensures a safe and reliable electrical connection between the cell 30 and the circuit board 60.

[0056] In one embodiment, the side wall of the bottom shell 20 is provided with a positioning seat 25, and the edge of the battery bracket 70 is provided with a positioning sleeve 72. Both the positioning sleeve 72 and the positioning seat 25 are provided with positioning holes. The positioning sleeve 72 is fitted on the positioning seat 25 and is used to achieve positioning of the bottom shell 20 and the battery bracket 70 by fastening the two positioning holes.

[0057] This structural design effectively solves the problem of potential displacement of the battery bracket 70 within the bottom shell 20, ensuring the stable layout of the battery cell 30 and circuit board 60 inside the battery, thereby improving the overall structural stability of the battery and the reliability of electrical connections.

[0058] In one embodiment, the waterproof battery further includes a first conductive foam 81, a second conductive foam 82, and a cushioning foam 83. The first conductive foam 81 is sandwiched between the cover 10 and the circuit board 60, the second conductive foam 82 is sandwiched between the circuit board 60 and the battery bracket 70, and the cushioning foam 83 is sandwiched between the cover 10 and the circuit board 60.

[0059] The synergistic effect of the first conductive foam 81 and the second conductive foam 82 constructs a multi-layer electromagnetic shielding structure between the cover 10, the circuit board 60, and the battery bracket 70. This effectively suppresses and absorbs electromagnetic interference generated by the circuit board 60, significantly improving the electromagnetic compatibility of the waterproof battery and ensuring the stable operation of the circuit board 60 in complex electromagnetic environments. Simultaneously, the buffer foam 83, together with the conductive foam, provides comprehensive mechanical protection for the circuit board 60, effectively absorbing external impact and vibration energy and preventing damage to internal precision components due to mechanical stress. This comprehensive protection not only enhances the waterproof battery's anti-interference and impact resistance but also optimizes the fixation and protection of internal components, thereby significantly improving the overall reliability, stability, and service life of the waterproof battery.

[0060] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A waterproof battery, characterized in that, The device includes a top cover, a bottom shell, a battery cell, a circuit board, a positive electrode connector, and a negative electrode connector. The battery cell and the circuit board are housed within the bottom shell. The positive and negative electrode connectors are respectively injection-molded onto the top cover, and the top cover is sealed to the bottom shell. The circuit board is electrically connected to the battery cell and has a positive and a negative electrode metal interface. One end of the positive electrode connector is inserted into and electrically connected to the positive electrode metal interface, and one end of the negative electrode connector is inserted into and electrically connected to the negative electrode metal interface. The other ends of the positive and negative electrode connectors protrude from the top cover. The positive electrode connector includes a plurality of positive electrode metal rods. Each positive electrode metal rod includes an injection molding part, a positioning part, and an insertion part. The injection molding part is injection molded into the cover. One end of the injection molding part is used to electrically connect to the positive electrode of an external device. The other end of the injection molding part is connected to one end of the positioning part. The other end of the positioning part is connected to one end of the insertion part. The other end of the insertion part is inserted into the positive electrode metal interface. The negative electrode connector includes a negative electrode positioning component, a negative electrode sheet, and a negative electrode fastener. The negative electrode positioning component is injection molded into the cover. The negative electrode sheet has a fastening hole. The negative electrode positioning component has a blind hole. The negative electrode fastener passes through the fastening hole in sequence and is positioned in the blind hole to position the negative electrode sheet to the cover. The cover is provided with a negative electrode mounting seat and a positive electrode mounting seat. The negative electrode mounting seats are symmetrically arranged on both sides of the positive electrode mounting seat with the positive electrode mounting seat as the center. The negative electrode sheet is disposed on the negative electrode mounting seat. The top end of the injection molded part extends out of the positive electrode mounting seat. A screw-in groove for screwing in the negative electrode of an external device is formed between the negative electrode mounting seat, the negative electrode sheet and the cover. The negative electrode includes a mounting portion, an inclined portion, and a transition portion. The mounting portion is connected to the negative electrode mounting base through the fastening hole. The inclined portion is inclined to the cover. The transition portion is located between the mounting portion and the inclined portion. The height of the end of the inclined surface of the inclined portion near the opening of the screw-in groove from the surface of the cover is greater than the height of the end of the inclined surface away from the opening of the screw-in groove from the surface of the cover. This is used to screw the negative electrode of the external device into the screw-in groove and fit it against the negative electrode.

2. The waterproof battery according to claim 1, characterized in that, The outer diameter of the positioning part is larger than the outer diameter of the insertion part, and is used to position the circuit board by abutting the positive metal interface when the insertion part is inserted into the positive metal interface.

3. The waterproof battery according to claim 1, characterized in that, One end of the negative electrode positioning component is injection molded into the cover, and the other end of the negative electrode positioning component has an opening for holding the other end of the negative electrode positioning component against the negative electrode metal interface.

4. The waterproof battery according to claim 1, characterized in that, The positive electrode mounting base is a circular base protruding from the outer surface of the cover, and the top of the injection-molded part is recessed into the circular base to accommodate the retractable positive electrode of the external device.

5. The waterproof battery according to claim 1, characterized in that, The bottom shell is provided with an ultrasonic groove, and the top cover is provided with an ultrasonic boss. The width of the ultrasonic boss is wider than the width of the ultrasonic groove, so that the ultrasonic boss is inserted into the ultrasonic groove with an interference fit, thereby achieving a sealed connection between the top cover and the bottom shell.

6. The waterproof battery according to claim 5, characterized in that, The cover also includes a first electromagnetic interference resistant part circumferentially disposed on the inner side of the ultrasonic protrusion. The first electromagnetic interference resistant part has a first inclined surface extending toward the ultrasonic groove. The bottom shell also includes a second electromagnetic interference resistant part circumferentially disposed on the inner side of the ultrasonic groove. The second electromagnetic interference resistant part has a second inclined surface extending toward the ultrasonic protrusion. A bent channel is formed between the first inclined surface and the second inclined surface to block the transmission of electromagnetic waves.

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