An ultra-thin waterproof battery

Abstract

The application discloses an ultrathin waterproof battery and relates to the technical field of ultrathin batteries. The ultrathin waterproof battery comprises a thin-wall shell, a sealing convex plate which is in communication with the inside of the thin-wall shell is arranged on the top side of the thin-wall shell, a first leaving hole is formed in the side wall of the sealing convex plate, an electric core assembly is arranged in the inside of the thin-wall shell, a plurality of wires are fixedly installed on the top side of the electric core assembly, one end of the plurality of wires penetrates through the first leaving hole and is fixedly installed with the same plug. The application is provided with the bonding glue ring, so that the two-component structural glue is quickly injected around the concave surface of the thin-wall cover, the bonding glue ring is automatically formed on the top of the flame-retardant block and the thin-wall cover after complete solidification, a waterproof separation layer is formed on the outermost side of the thin-wall shell, the waterproof battery has sufficient structural strength and waterproof performance, the protection level of the waterproof battery under the extreme space and underwater wire of 30 meters can reach IP68, and the fire and explosion accident rate of the waterproof battery due to impact is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of ultra-thin battery technology, and more specifically to an ultra-thin waterproof battery. Background Technology

[0002] Ultra-thin batteries are batteries with extremely thin thicknesses, mainly divided into two categories: ultra-thin lithium batteries and ultra-thin solar cells. Their thickness can be as thin as 0.2 mm. Ultra-thin batteries utilize soft-pack or stacked processes, with the wall thickness of their outer casing or battery sleeve typically between 0.2 mm and 1 mm. They are 40% lighter than traditional steel-cased batteries, yet have approximately 10% higher capacity. They are characterized by their thinness, flexibility, and customizable dimensions, and are widely used in the field of new energy vehicles. Ultra-thin batteries can be embedded in previously unused spaces such as chassis layers, door panel gaps, seat bottoms, and headliners, eliminating the need for additional dedicated battery compartments. Furthermore, at the same weight, the energy density of ultra-thin batteries is 20%-30% higher than traditional lithium iron phosphate cells, increasing the vehicle's CLTC range by more than 15% without increasing the overall vehicle weight. Additionally, ultra-thin cells have a large heat dissipation area and a short heat conduction path, making them compatible with high-power fast charging technology and significantly reducing users' range anxiety. Currently, ultra-thin batteries generally use PVC heat shrink tubing to make the outer shell as the battery sleeve. Although this type of battery sleeve can be used to cover the battery cells and form an ultra-thin battery, it cannot effectively waterproof the battery and has poor structural strength. It is not stable enough when the car is driving on complex road sections. Therefore, an ultra-thin waterproof battery is proposed. Summary of the Invention

[0003] The purpose of this invention is to solve the problems that battery sleeves made using the current PVC heat shrink tubing process cannot effectively waterproof the battery and have poor structural strength. This invention provides an ultra-thin waterproof battery.

[0004] To achieve the above objectives, the present invention specifically adopts the following technical solution: An ultra-thin waterproof battery includes a thin-walled outer shell. A sealing protrusion communicating with the interior of the thin-walled outer shell is provided on one side of its top end. A first clearance hole is provided on the side wall of the sealing protrusion. A battery cell assembly is placed inside the thin-walled outer shell. Multiple wires are fixedly installed on one side of the top end of the battery cell assembly. One end of each wire passes through the first clearance hole and is fixedly installed with the same plug. A thin-walled cover is placed on top of the battery cell assembly. A second clearance hole adapted to the wires is provided on one side of the thin-walled cover. An adhesive ring is fitted onto the top of the thin-walled cover. Both the thin-walled cover and the adhesive ring are located inside the thin-walled outer shell. An external sealing component is provided on one side of the plug to maintain the external seal of the plug and the wires. An internal flame-retardant structure is provided inside the thin-walled outer shell to cover the battery cell assembly and automatically retard flames in an emergency.

[0005] Furthermore, the external sealing assembly includes a mounting plate fixedly installed on one side of the plug, the mounting plate being fixedly sleeved on the plurality of wires, and a sealing ring being fixedly installed on the side of the mounting plate near the plug.

[0006] Furthermore, an outer rubber tube is fixedly installed on the other side of the mounting plate, the wire is located inside the outer rubber tube, the other end of the outer rubber tube is fixedly installed on the outside of the sealing protrusion, and the first clearance hole is located inside the outer rubber tube.

[0007] Furthermore, each of the conductors is movably fitted with multiple uniformly distributed corrugated rings, the cross-section of which is "S" shaped, and any two adjacent corrugated rings interlock end to end.

[0008] Furthermore, the internal flame-retardant structure includes an upper flame-retardant cover and a lower flame-retardant cover placed inside the thin-walled outer shell. The upper flame-retardant cover is sleeved on the top of the battery cell assembly. A plurality of third clearance holes adapted to the wires are opened on one side of the upper flame-retardant cover. The thin-walled cover is sleeved on the top of the upper flame-retardant cover. The battery cell assembly is located inside the lower flame-retardant cover. The upper flame-retardant cover and the lower flame-retardant cover are fixedly connected.

[0009] Furthermore, a plurality of evenly distributed limiting feet are fixedly installed on the bottom inner wall of the thin-walled outer shell, and a plurality of evenly distributed fourth clearance holes are opened at the bottom of the lower flame-retardant cover. The plurality of limiting feet are respectively located inside the plurality of fourth clearance holes, and the battery cell assembly is fixedly installed on the top of the plurality of limiting feet.

[0010] Furthermore, an upper airbag is fixedly installed on the top of the upper flame-retardant cover, and the upper airbag extends to the bottom of the upper flame-retardant cover. Multiple evenly distributed lower airbags are fixedly installed on the periphery of the lower flame-retardant cover, and the lower airbags extend into the interior of the lower flame-retardant cover. Both the upper airbag and the lower airbag are filled with flame-retardant powder.

[0011] Furthermore, a flame-retardant block is placed inside the sealing convex plate, and the flame-retardant block has multiple evenly distributed fifth clearance holes inside, which are adapted to the wire.

[0012] The beneficial effects of this invention are as follows: 1. This invention, by setting an adhesive ring, allows the two-component structural adhesive to be quickly injected into the concave surfaces around the thin-walled cap, keeping the battery stationary. After complete curing, the adhesive ring automatically forms on the top of the flame-retardant block and the thin-walled cap, forming the outermost waterproof barrier with the thin-walled shell. It has sufficient structural strength and waterproof performance, and the protection level can reach IP68 even in extreme spaces and 30 meters of underwater wires, effectively reducing the fire and explosion accident rate of this waterproof battery due to impact. 2. By setting an internal flame-retardant structure, the upper and lower flame-retardant covers can adaptively fill the gap between the battery cell assembly and the thin-walled outer shell by means of their own elastic deformation, making the fit between the thin-walled outer shell and the battery cell assembly tighter. At the same time, the upper and lower airbags play a certain buffering role, increasing the shock resistance of the waterproof battery. In addition, when the battery cell assembly experiences thermal runaway, spontaneous combustion or other emergency situations, the inner walls of the upper and lower airbags are burned through, and the flame-retardant powder inside decomposes under ultra-high temperature, releasing non-flammable substances, which plays a key flame-retardant role. Combined with the overall sealing of the upper and lower flame-retardant covers, it can promptly prevent or significantly delay the spread of fire. 3. This invention sets up an external sealing assembly, uniformly sleeves an outer rubber tube onto multiple wires and corrugated rings, glues one end of the outer rubber tube to the outer wall of the sealing protrusion, seals the first clearance hole from the outside, and then assembles a plug onto one end of multiple wires, glues the other end of the outer rubber tube to the side wall of the mounting plate, thereby ensuring the internal sealing of the outer rubber tube. At the same time, when the plug is inserted into other equipment interfaces, fasteners such as rivets and screws can be used to lock the mounting plate to the side wall of the equipment to prevent the plug from loosening, and at the same time, the sealing ring is pressed to ensure the sealing of the plug and the interface, achieving external waterproofing. 4. By setting a flame-retardant block, after the wires and plugs are assembled, the thin-walled cover is fastened to the top of the upper flame-retardant cover, so that the edge of the thin-walled cover fits tightly with the inner side of the thin-walled shell. At this time, inorganic glue in a fluid state is injected into the sealing protrusion, which solidifies into a flame-retardant block, sealing the first clearance hole from the inside, further improving the sealing performance, and fixing the inner end of the wire a second time to prevent the inner end of the wire from shaking and causing poor contact and wear. At the same time, the thin-walled cover is pre-positioned to facilitate the casting of the adhesive ring. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is an exploded view of the present invention; Figure 3 This is a three-dimensional structural diagram of the present invention after removing the outer sealing component; Figure 4 This is a three-dimensional structural diagram of the present invention after the adhesive ring is removed; Figure 5This is a schematic diagram of the internal three-dimensional structure of the thin-walled outer shell of the present invention; Figure 6 This is a schematic diagram of the bottom three-dimensional structure of the thin-walled cap of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the bottom of the adhesive ring of the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of the flame-retardant block of the present invention; Figure 9 This is a schematic diagram of the three-dimensional structure of the flame-retardant cover of the present invention; Figure 10 This is a first-view three-dimensional structural diagram of the flame-retardant cover of the present invention; Figure 11 This is a two-dimensional structural diagram of the flame-retardant cover of the present invention from a second perspective. Figure 12 This is a three-dimensional structural diagram of the external sealing component and the plug of the present invention; Figure 13 This is a schematic diagram of the internal three-dimensional structure of the outer tubing of the present invention; Figure 14 This is a cross-sectional three-dimensional structural diagram of the corrugated ring of the present invention; Reference numerals: 1. Thin-walled outer shell; 101. Sealing protrusion; 102. First clearance hole; 103. Limiting foot rubber; 2. Battery cell assembly; 3. Wire; 4. Plug; 5. Thin-walled cover; 501. Second clearance hole; 6. Adhesive ring; 7. Assembly plate; 8. Sealing ring; 9. Outer tubing; 10. Corrugated ring; 11. Upper flame-retardant cover; 1101. Third clearance hole; 1102. Upper airbag; 12. Lower flame-retardant cover; 1201. Fourth clearance hole; 1202. Lower airbag; 13. Flame-retardant block; 1301. Fifth clearance hole. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0015] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0016] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0017] In the description of the embodiments of the present invention, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present 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. Therefore, they should not be construed as limiting the present invention.

[0018] like Figures 1 to 14 As shown, an ultra-thin waterproof battery includes a thin-walled outer casing 1, such as... Figure 2 , Figure 5 , Figure 6 As shown, specifically, a sealing protrusion 101 communicating with the interior of the thin-walled shell 1 is provided on one side of the top of the thin-walled shell 1. A first clearance hole 102 is provided on the side wall of the sealing protrusion 101. A battery cell assembly 2 is placed inside the thin-walled shell 1. Multiple wires 3 are fixedly installed on one side of the top of the battery cell assembly 2. One end of the multiple wires 3 passes through the first clearance hole 102 and is fixedly installed with the same plug 4. A thin-walled cover 5 is placed on the top of the battery cell assembly 2. A second clearance hole 501 adapted to the wires 3 is provided on one side of the thin-walled cover 5. Multiple evenly distributed limiting feet 103 are fixedly installed on the bottom inner wall of the thin-walled shell 1. The battery cell assembly 2 is fixedly installed on the top of the multiple limiting feet 103.

[0019] In a preferred embodiment, both the thin-walled outer shell 1 and the thin-walled cover 5 are made of 0.3mm PC sheet.

[0020] More specifically, during the assembly of this ultra-thin waterproof battery, the battery cells are first welded to the BMS to form a battery cell assembly 2. Then, the upper flame-retardant cover 11 is fitted onto the top of the battery cell assembly 2, and the lower flame-retardant cover 12 is fitted onto the bottom. The bottom edge of the upper flame-retardant cover 11 is then bonded to the top edge of the lower flame-retardant cover 12. Structural adhesive is then applied to the limiting foot adhesive 103 inside the thin-walled shell 1. The battery cell assembly 2, which is covered with the upper flame-retardant cover 11 and the lower flame-retardant cover 12, is then placed into the thin-walled shell 1. By setting the limiting foot adhesive 103, each limiting foot adhesive 103 passes through the fourth clearance hole 1201 at the bottom of the lower flame-retardant cover 12 and is bonded to the bottom of the battery cell assembly 2. This can fix the battery cell assembly 2 inside the thin-walled shell 1, thereby preventing the battery cell assembly 2 from shaking inside the thin-walled shell 1 and effectively improving the connection strength between the thin-walled shell 1 and the battery cell assembly 2.

[0021] The thin-walled outer casing 1 has an internal flame-retardant structure for encapsulating the battery cell assembly 2 and automatically retardant in an emergency, such as... Figure 2 , Figure 8 , Figure 9 , Figure 10 As shown, specifically, the internal flame-retardant structure includes an upper flame-retardant cover 11 and a lower flame-retardant cover 12 placed inside the thin-walled outer shell 1. The upper flame-retardant cover 11 is fitted onto the top of the battery cell assembly 2. Multiple third clearance holes 1101 adapted to the wires 3 are provided on one side of the upper flame-retardant cover 11. The thin-walled cover 5 is fitted onto the top of the upper flame-retardant cover 11. The battery cell assembly 2 is located inside the lower flame-retardant cover 12. The upper flame-retardant cover 11 and the lower flame-retardant cover 12 are fixedly connected. Multiple uniformly spaced holes are provided at the bottom of the lower flame-retardant cover 12. The fourth clearance hole 1201 is distributed, and multiple limiting foot rubbers 103 are respectively located inside the multiple fourth clearance holes 1201. An upper airbag 1102 is fixedly installed on the top of the upper flame retardant cover 11, and the upper airbag 1102 extends to the bottom of the upper flame retardant cover 11. Multiple evenly distributed lower airbags 1202 are fixedly installed on the periphery of the lower flame retardant cover 12, and the lower airbags 1202 all extend into the interior of the lower flame retardant cover 12. The interiors of the upper airbag 1102 and the lower airbag 1202 are filled with flame retardant powder.

[0022] In this embodiment, the upper flame-retardant cover 11, the lower flame-retardant cover 12, and the upper airbag 1102 and lower airbag 1202 can be made of a variety of flame-retardant materials, such as asbestos fiber, composite PET fiber, and waterproof and fireproof coatings. Correspondingly, the inner sidewalls of the upper airbag 1102 and lower airbag 1202 facing the battery cell assembly 2 are only waterproofed and airtight, without fireproof and flame-retardant treatment, so as to release the flame-retardant powder. The flame-retardant powder can be any small-particle-size dry powder or a composite powder composed of multiple dry powders that has heat absorption, flame retardant and fire extinguishing effects in the prior art, such as ammonium dihydrogen phosphate, ammonium sulfate, etc., which decompose when heated.

[0023] More specifically, by setting an internal flame-retardant structure, the upper flame-retardant cover 11 and the lower flame-retardant cover 12 can adaptively fill the gap between the cell assembly 2 and the thin-walled outer shell 1 by utilizing their own elastic deformation capabilities, making the fit between the thin-walled outer shell 1 and the cell assembly 2 tighter. At the same time, the upper airbag 1102 and the lower airbag 1202 play a certain buffering role, increasing the shock resistance of the waterproof battery. Meanwhile, when the cell assembly 2 experiences thermal runaway, spontaneous combustion, or other emergency situations, the inner walls of the upper airbag 1102 and the lower airbag 1202 are burned through, and the internal flame-retardant powder decomposes under ultra-high temperature, releasing non-flammable substances, playing a key flame-retardant role. Combined with the overall sealing of the upper flame-retardant cover 11 and the lower flame-retardant cover 12, the spread of fire is promptly prevented or significantly delayed.

[0024] like Figure 13 , Figure 14As shown, specifically, multiple evenly distributed corrugated rings 10 are movably sleeved on the conductor 3. The cross-section of the corrugated ring 10 is "S" shaped, and any two adjacent corrugated rings 10 interlock end to end.

[0025] More specifically, by setting corrugated rings 10, one end of multiple wires 3 is sequentially passed through the first clearance hole 102 on the sealing protrusion 101 and the third clearance hole 1101 on the upper flame retardant cover 11 and fixedly inserted into the terminal of the battery cell assembly 2. Then, a chain-like corrugated tube composed of multiple corrugated rings 10 connected end to end is sleeved on the other end of the wires 3, so that the corrugated rings 10 cover each wire 3. While retaining a certain degree of bending flexibility of the wires 3, it provides sufficient protection for the wires 3 and improves the wires 3's resistance to shearing and tearing.

[0026] One side of the plug 4 is provided with an external sealing component to maintain the external seal between the plug 4 and the wire 3, such as... Figure 1 , Figure 3 , Figure 12 As shown, specifically, the outer sealing assembly includes a mounting plate 7 fixedly installed on one side of the plug 4. The mounting plate 7 is fixedly sleeved on multiple wires 3. A sealing ring 8 is fixedly installed on the side of the mounting plate 7 near the plug 4. An outer rubber tube 9 is fixedly installed on the other side of the mounting plate 7. The wires 3 are located inside the outer rubber tube 9. The other end of the outer rubber tube 9 is fixedly installed on the outside of the sealing protrusion 101. The first clearance hole 102 is located inside the outer rubber tube 9.

[0027] In this embodiment, the connection between the outer rubber tube 9 and the mounting plate 7 and the sealing protrusion 101, and the connection between the upper flame retardant cover 11 and the lower flame retardant cover 12 can all be fixed and assembled by adhesive bonding.

[0028] More specifically, by setting an external sealing assembly, after uniformly connecting the outer rubber tube 9 to multiple wires 3 and corrugated ring 10, one end of the outer rubber tube 9 is glued to the outer wall of the sealing protrusion 101, sealing the first clearance hole 102 from the outside. Then, a plug 4 is assembled to one end of multiple wires 3, and the other end of the outer rubber tube 9 is glued to the side wall of the mounting plate 7, thereby ensuring the internal sealing of the outer rubber tube 9. At the same time, when the plug 4 is plugged into other equipment interfaces, fasteners such as rivets and screws can be used to lock the mounting plate 7 to the side wall of the equipment to prevent the plug 4 from loosening. At the same time, the sealing ring 8 is pressed to ensure the sealing between the plug 4 and the interface, achieving external waterproofing.

[0029] like Figure 4 , Figure 11 As shown, specifically, a flame-retardant block 13 is placed on the sealing convex plate 101, and multiple evenly distributed fifth clearance holes 1301 are opened inside the flame-retardant block 13. The fifth clearance holes 1301 are adapted to the wire 3.

[0030] In this embodiment, the flame-retardant block 13 is made of inorganic adhesive material.

[0031] More specifically, by setting the flame-retardant block 13, after the wire 3 and plug 4 are assembled, the thin-walled cover 5 is fastened to the top of the upper flame-retardant cover 11, so that the edge of the thin-walled cover 5 fits tightly with the inner side of the thin-walled outer shell 1. At this time, inorganic glue in a fluid state is injected into the sealing protrusion 101, which solidifies into the flame-retardant block 13, sealing the first clearance hole 102 from the inside, further improving the sealing performance, and fixing the inner end of the wire 3 a second time to prevent the inner end of the wire 3 from shaking and causing poor contact and wear. At the same time, the thin-walled cover 5 is pre-positioned so that the adhesive ring 6 can be cast.

[0032] like Figure 1 , Figure 2 , Figure 7 As shown, specifically, an adhesive ring 6 is fitted onto the top of the thin-walled cover 5, and both the thin-walled cover 5 and the adhesive ring 6 are located inside the thin-walled outer shell 1.

[0033] More specifically, by setting the adhesive ring 6, a high-viscosity, corrosion-resistant AB (2:1) two-component structural adhesive is preheated to 40-45 degrees Celsius and then quickly injected into the concave surface around the thin-walled cap 5. While keeping the battery stationary, the adhesive self-levels within 3-5 minutes, initially cures after half an hour, and fully cures after 4 hours. This automatically forms the adhesive ring 6 on the top of the flame-retardant block 13 and the thin-walled cap 5, forming the outermost waterproof barrier with the thin-walled shell 1. It has sufficient structural strength and waterproof performance, and can achieve an IP68 protection level even in extreme spaces and for 30 meters of underwater wires, effectively reducing the fire and explosion accident rate of this waterproof battery due to impact.

[0034] In summary: During assembly: First, weld the battery cells to the BMS to form the battery cell assembly 2. Then, fit the upper flame-retardant cover 11 onto the top of the battery cell assembly 2 and fit the lower flame-retardant cover 12 onto the bottom. Next, glue the bottom edge of the upper flame-retardant cover 11 to the top edge of the lower flame-retardant cover 12. Then, apply structural adhesive to the limiting foot adhesive 103 inside the thin-walled outer shell 1. Place the battery cell assembly 2, which covers the upper flame-retardant cover 11 and the lower flame-retardant cover 12, into the thin-walled outer shell 1. After uniformly attaching the outer rubber tube 9 to the multiple wires 3 and the corrugated ring 10, glue one end of the outer rubber tube 9 to the outer wall of the sealing protrusion 101 to seal the first clearance hole 102 from the outside. Then, assemble the plug 4 onto one end of the multiple wires 3 and glue the other end of the outer rubber tube 9 to the side wall of the mounting plate 7. At the same time, attach the plug 4 to the side wall of the mounting plate 7. When the head 4 is connected to other equipment interfaces, fasteners such as rivets and screws can be used to lock the assembly plate 7 to the side wall of the equipment. After the wires 3 and plug 4 are assembled, the thin-walled cover 5 is fastened to the top of the upper flame-retardant cover 11, so that the edge of the thin-walled cover 5 fits tightly with the inner side of the thin-walled outer shell 1. At this time, inorganic glue in a fluid state is injected into the sealing convex plate 101, so that it solidifies into a flame-retardant block 13. A high-viscosity, corrosion-resistant AB (2:1) two-component structural glue is preheated to 40-45 degrees, and then quickly injected into the concave surface around the thin-walled cover 5. Keep the battery stationary. The glue self-levels within 3-5 minutes, and will be initially cured after half an hour. It will be fully cured after 4 hours, and an adhesive ring 6 will be automatically formed on the top of the flame-retardant block 13 and the thin-walled cover 5. In use: Each limiting foot adhesive 103 passes through the fourth clearance hole 1201 at the bottom of the lower flame retardant cover 12 and is bonded to the bottom of the battery cell assembly 2, which can fix the battery cell assembly 2 inside the thin-walled shell 1, thereby preventing the battery cell assembly 2 from shaking inside the thin-walled shell 1 and effectively improving the connection strength between the thin-walled shell 1 and the battery cell assembly 2. The upper flame retardant cover 11 and the lower flame retardant cover 12 can adaptively fill the gap between the battery cell assembly 2 and the thin-walled shell 1 by means of their own elastic deformation ability, so that the fit between the thin-walled shell 1 and the battery cell assembly 2 is tighter. Meanwhile, the upper airbag 1102 and lower airbag 1202 provide a certain buffering effect, increasing the shock resistance of the waterproof battery. Furthermore, in the event of thermal runaway or spontaneous combustion of the battery cell assembly 2, the inner walls of the upper airbag 1102 and lower airbag 1202 are burned through, and the internal flame-retardant powder decomposes under ultra-high temperatures, releasing non-flammable substances, playing a crucial flame-retardant role. Combined with the overall sealing of the upper flame-retardant cover 11 and lower flame-retardant cover 12, this effectively prevents or significantly delays the spread of fire. Multiple wires 3 are sequentially passed through the sealing protrusion 10. The first clearance hole 102 on the upper 1 and the third clearance hole 1101 on the upper flame-retardant cover 11 are fixedly inserted into the terminals of the battery cell assembly 2. Then, a chain-like corrugated tube composed of multiple corrugated rings 10 connected end to end is sleeved on the other end of the wire 3. The corrugated rings 10 cover each wire 3, providing sufficient protection for the wire 3 while maintaining a certain degree of bending flexibility, and improving the wire 3's resistance to shearing and tearing. The mounting plate 7 can prevent the plug 4 from loosening, and at the same time, it presses the sealing ring 8 to ensure the sealing between the plug 4 and the interface, thus achieving... The external waterproofing and flame-retardant block 13 seals the first clearance hole 102 from the inside, further improving the sealing performance and providing secondary fixation for the inner end of the wire 3 to prevent poor contact and wear caused by the inner end of the wire 3 shaking. At the same time, the thin-walled cover 5 is pre-positioned to facilitate the casting of the adhesive ring 6. The adhesive ring 6 and the thin-walled outer shell 1 form the outermost waterproof barrier layer, which has sufficient structural strength and waterproof performance. The protection level can reach IP68 even in extreme spaces and for 30 meters of underwater wires, effectively reducing the fire and explosion accident rate of this waterproof battery due to impact.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. An ultra-thin waterproof battery, characterized in that, The device includes a thin-walled outer shell (1), on one side of the top of the thin-walled outer shell (1) being a sealing protrusion (101) communicating with the interior of the thin-walled outer shell (1). A first clearance hole (102) is provided on the side wall of the sealing protrusion (101). A battery cell assembly (2) is placed inside the thin-walled outer shell (1). Multiple wires (3) are fixedly installed on one side of the top of the battery cell assembly (2). One end of each of the multiple wires (3) passes through the first clearance hole (102) and is fixedly installed with the same plug (4). A thin-walled sealing plate is placed on the top of the battery cell assembly (2). The cover (5) has a second clearance hole (501) on one side that is adapted to the wire (3). The top of the thin-walled cover (5) is fitted with an adhesive ring (6). The thin-walled cover (5) and the adhesive ring (6) are both located inside the thin-walled outer shell (1). The plug (4) has an external sealing component on one side for maintaining the external sealing of the plug (4) and the wire (3). The thin-walled outer shell (1) has an internal flame-retardant structure inside for covering the battery cell assembly (2) and automatically retardant in an emergency.

2. The ultra-thin waterproof battery according to claim 1, characterized in that, The external sealing assembly includes a mounting plate (7) fixedly installed on one side of the plug (4), the mounting plate (7) being fixedly sleeved on the plurality of wires (3), and a sealing ring (8) being fixedly installed on the side of the mounting plate (7) near the plug (4).

3. The ultra-thin waterproof battery according to claim 2, characterized in that, An outer rubber tube (9) is fixedly installed on the other side of the mounting plate (7). The wire (3) is located inside the outer rubber tube (9). The other end of the outer rubber tube (9) is fixedly installed on the outside of the sealing protrusion (101). The first clearance hole (102) is located inside the outer rubber tube (9).

4. The ultra-thin waterproof battery according to claim 2, characterized in that, Multiple evenly distributed corrugated rings (10) are movably sleeved on the conductor (3). The cross-section of the corrugated ring (10) is "S" shaped, and any two adjacent corrugated rings (10) are interlocked end to end.

5. The ultra-thin waterproof battery according to claim 1, characterized in that, The internal flame-retardant structure includes an upper flame-retardant cover (11) and a lower flame-retardant cover (12) placed inside the thin-walled outer shell (1). The upper flame-retardant cover (11) is sleeved on the top of the battery cell assembly (2). A plurality of third clearance holes (1101) adapted to the wire (3) are opened on one side of the upper flame-retardant cover (11). The thin-walled cover (5) is sleeved on the top of the upper flame-retardant cover (11). The battery cell assembly (2) is located inside the lower flame-retardant cover (12). The upper flame-retardant cover (11) and the lower flame-retardant cover (12) are fixedly connected.

6. The ultra-thin waterproof battery according to claim 5, characterized in that, Multiple evenly distributed limiting feet (103) are fixedly installed on the bottom inner wall of the thin-walled outer shell (1). Multiple evenly distributed fourth clearance holes (1201) are opened at the bottom of the lower flame retardant cover (12). The multiple limiting feet (103) are respectively located inside the multiple fourth clearance holes (1201). The battery cell assembly (2) is fixedly installed on the top of the multiple limiting feet (103).

7. The ultra-thin waterproof battery according to claim 5, characterized in that, An upper airbag (1102) is fixedly installed on the top of the upper flame retardant cover (11), and the upper airbag (1102) extends to the bottom of the upper flame retardant cover (11). Multiple evenly distributed lower airbags (1202) are fixedly installed on the periphery of the lower flame retardant cover (12), and the lower airbags (1202) extend into the interior of the lower flame retardant cover (12). Both the upper airbag (1102) and the lower airbag (1202) are filled with flame retardant powder.

8. The ultra-thin waterproof battery according to claim 1, characterized in that, The sealing convex plate (101) has a flame-retardant block (13) inside, and the flame-retardant block (13) has a plurality of evenly distributed fifth clearance holes (1301) inside, which are adapted to the wire (3).

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