A power battery structure for a massager

Abstract

This utility model discloses a power battery structure for a massager, relating to the field of massager battery structure technology. It includes a composite protective shell, battery cell units, a heat-conducting component, and a current-conducting component. The technical solution of this utility model utilizes the synergistic effect of a rigid flame-retardant layer, a flexible buffer layer, and a ceramic coating in the multi-layer composite protective shell to effectively buffer vibration while ensuring flame-retardant performance. Combined with an alumina insulating layer and copper heat-conducting wire design with an internal ceramic separator, physical isolation between battery cells is achieved. The heat-conducting component adopts a wrapped heat-conducting pipe combined with a spiral groove structure filled with phase change material, forming an efficient heat conduction path with heat dissipation fins, significantly improving the overall heat dissipation efficiency of the battery system. Ultimately, under multiple protection mechanisms, it solves the problems of lifespan degradation and safety hazards caused by vibration and heat accumulation in existing massager batteries, while also considering thermal management and structural reliability within a compact space.

Description

Technical Field

[0001] This utility model relates to the field of massager battery structure technology, specifically a power battery structure for a massager. Background Technology

[0002] As described in the published patent CN209596175U, massagers can help people relieve stress and eliminate fatigue. Electric massagers, in particular, are popular due to their lightweight and portable design. Existing electric massagers generally use two types of batteries: one is powered by an external battery. However, with this type of massager, high-frequency vibrations cause friction between the battery and the massager body, leading to battery overheating and melting, potentially causing danger or damage to the massager body, and also generating significant noise. The other type uses a built-in battery. Because the battery is in a sealed space, it generates a lot of heat during use or charging, reducing battery life and even posing a danger during use.

[0003] In summary, in the existing technology, during the use of a massager, overload or overcharging can cause the battery of the massager to overheat, which can easily damage the massager and even affect the user's safety. Utility Model Content

[0004] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A power battery structure for a massager includes a composite protective shell, a battery cell, a heat-conducting component, and a current-conducting component;

[0007] The composite protective shell consists of a three-layer composite structure consisting of a rigid flame-retardant layer, a flexible buffer layer, and a ceramic coating arranged sequentially from the outside to the inside.

[0008] Multiple battery cells are housed within a composite protective housing. Ceramic separators are placed between adjacent battery cells. The surface of the ceramic separators is covered with an aluminum oxide insulating layer, and copper heat-conducting wires are embedded inside the ceramic separators.

[0009] The heat-conducting component includes a heat-conducting pipe that covers multiple battery cells and ceramic separators. The outer wall of the heat-conducting pipe is fixedly abutted against the inner cavity of the composite protective shell. Heat dissipation fins are connected to both ends of the heat-conducting pipe. The surface of the heat-conducting pipe is provided with a spiral groove, and the spiral groove is filled with a phase change material.

[0010] The flow guiding assembly includes a top flow guiding pipe and a bottom flow guiding pipe respectively disposed on the top and bottom of the rigid flame retardant layer, and the top flow guiding pipe and the bottom flow guiding pipe are respectively connected to the internal cavity of the composite protective shell.

[0011] As a further embodiment of this utility model: in the composite protective shell, the rigid flame-retardant layer includes an aluminum nitride-reinforced polyether ether ketone material layer;

[0012] The flexible buffer layer includes a polyurethane microporous foam material layer, and the contact surface between the flexible buffer layer and the rigid flame retardant layer is provided with a serrated interface.

[0013] The ceramic coating includes a silicon nitride and aluminum oxide composite layer coated on a flexible buffer layer;

[0014] The rigid flame-retardant layer and the flexible buffer layer are formed by a hot-pressing composite process, wherein a cross-linked adhesive is pre-placed between the rigid flame-retardant layer and the flexible buffer layer.

[0015] As a further embodiment of this utility model: the structural extension direction of the ceramic separator is perpendicular to the height direction of the battery cell unit;

[0016] The surface of the alumina insulating layer is uniformly distributed with micropores.

[0017] Multiple copper heat-conducting wires are staggered along the thickness of the ceramic partition, and the ends of the copper heat-conducting wires extend to the edge of the ceramic partition to form heat-conducting terminals.

[0018] The surface of the copper heat-conducting wire is coated with a nano-boron nitride coating.

[0019] As a further embodiment of this utility model: the top guide pipe and the bottom guide pipe are diagonally distributed, and each of the top guide pipe and the bottom guide pipe is provided with a guide channel, which adopts a gradually contracting structure.

[0020] As a further embodiment of this utility model: the heat pipe includes a copper-graphene composite tube body, and an axial microchannel is provided inside the heat pipe;

[0021] The cross-section of the spiral groove is trapezoidal;

[0022] The surface of the spiral groove is covered with a ceramic sealant layer, and the phase change material is filled between the ceramic sealant layer and the spiral groove. The phase change material includes a tetradecane and expanded graphite composite.

[0023] As a further embodiment of this utility model: the heat dissipation fins and the ends of the heat pipe adopt a tenon-and-mortise joint structure, the joint surfaces of the heat dissipation fins and the ends of the heat pipe are coated with liquid metal thermal paste, and the surface of the heat dissipation fins is provided with honeycomb-shaped grooves.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0025] This utility model's technical solution utilizes the synergistic effect of a rigid flame-retardant layer, a flexible buffer layer, and a ceramic coating in a multi-layered composite protective shell to effectively buffer vibration while ensuring flame-retardant performance. Combined with an alumina insulating layer and copper heat-conducting wire design with an internal ceramic separator, it achieves physical isolation between battery cells. The heat-conducting component adopts a spiral groove structure filled with phase change material using a wrapped heat-conducting pipe, which, together with the heat dissipation fins, forms an efficient heat conduction path, significantly improving the overall heat dissipation efficiency of the battery system. Ultimately, under multiple protection mechanisms, it solves the problems of lifespan degradation and safety hazards caused by vibration and heat accumulation in existing massager batteries, while also taking into account thermal management and structural reliability within a compact space. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural view of the present invention;

[0027] Figure 2 This is a three-dimensional view of the internal structure of this utility model;

[0028] Figure 3 This is a schematic diagram of the composite protective shell in this utility model;

[0029] Figure 4 This is a schematic diagram of the battery cell unit in this utility model;

[0030] Figure 5 This is a schematic diagram of the heat pipe structure in this utility model;

[0031] Figure 6 This is a schematic diagram of the flow guiding component in this utility model;

[0032] Figure 7 This is a schematic diagram of the heat dissipation fins in this utility model;

[0033] The reference numerals and names in the figure are as follows:

[0034] Composite protective shell - 100, battery cell unit - 101, heat conduction component - 102, current guiding component - 103, rigid flame retardant layer - 104, flexible buffer layer - 105, ceramic coating - 106, ceramic separator - 108, copper heat conduction wire - 110, heat conduction pipe - 111, heat dissipation fins - 112, spiral groove - 113, top current guiding pipe - 115, bottom current guiding pipe - 116, aluminum nitride reinforced polyetheretherketone material layer - 1 18. Polyurethane microporous foam material layer - 119. Serrated interface - 120. Silicon nitride and alumina composite layer - 121. Crosslinked adhesive - 122. Thermally conductive terminal - 124. Flow channel - 126. Copper-graphene composite tube - 129. Axial microchannel - 130. Ceramic sealant layer - 132. Tetradecane and expanded graphite composite - 133. Tenon and mortise joint structure - 134. Honeycomb groove - 136. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] Please see Figure 1-7 A power battery structure for a massager includes a composite protective shell 100, a battery cell 101, a heat-conducting component 102, and a current-conducting component 103.

[0037] The composite protective shell 100 comprises a three-layer composite structure consisting of a rigid flame-retardant layer 104, a flexible buffer layer 105, and a ceramic coating 106 arranged sequentially from the outside to the inside.

[0038] Multiple battery cell units 101 are arranged inside the composite protective housing 100. A ceramic separator 108 is arranged between adjacent battery cell units 101. The surface of the ceramic separator 108 is provided with an aluminum oxide insulating layer, and a copper heat-conducting wire 110 is embedded inside the ceramic separator.

[0039] The heat-conducting component 102 includes a heat-conducting pipe 111 covering multiple battery cell units 101 and a ceramic separator 108. The outer wall of the heat-conducting pipe 111 is fixedly abutted against the inner cavity of the composite protective shell. Heat dissipation fins 112 are connected to both ends of the heat-conducting pipe 111. The surface of the heat-conducting pipe 111 is provided with a spiral groove 113, and the spiral groove 113 is filled with a phase change material.

[0040] The flow guiding assembly 103 includes a top flow guiding pipe 115 and a bottom flow guiding pipe 116 respectively disposed on the top and bottom of the rigid flame retardant layer 104, and the top flow guiding pipe 115 and the bottom flow guiding pipe 116 are respectively connected to the internal cavity of the composite protective shell 100.

[0041] This utility model's technical solution improves battery safety and thermal management efficiency through multi-dimensional design:

[0042] Made of flame-retardant engineering plastics, it directly resists external impacts and high-temperature environments, preventing the spread of flames;

[0043] The battery is filled with silicone or polyurethane foam material, which absorbs the high-frequency vibration energy of the massager through a honeycomb porous structure, providing flexible buffering while reducing the impact of high-frequency vibration on the battery cell.

[0044] An aluminum nitride-based ceramic layer (0.5-1mm thick) is sprayed onto the inner wall of the flexible layer to utilize its high dielectric strength and arc resistance to avoid the risk of short circuit breakdown of the battery cell.

[0045] Using 96% alumina ceramic as the matrix (thermal conductivity 28W / m·K), a 10-20μm alumina insulating layer is generated on the surface through anodizing to block leakage current between cells;

[0046] A copper wire array is pre-embedded inside the ceramic separator to direct the heat from the surface of the battery cell to the heat pipe 111 in a grid pattern.

[0047] The ceramic separator and cell layout ensure that the gap between adjacent cells is ≥5mm to prevent thermal diffusion chain reactions.

[0048] The encapsulated heat pipe 111 is made of 6063 aluminum alloy extrusion molding. The inner wall is closely attached to the battery cell assembly and filled with thermal grease. The outer wall is CNC machined with spiral grooves 113.

[0049] Composite phase change material is injected into the groove to absorb the peak heat of battery charging and discharging through solid-liquid phase change, thus slowing down the rate of temperature rise.

[0050] Aluminum alloy fin assemblies are welded to both ends of the heat pipe 111, and the heat is diffused to the outer surface of the shell through natural convection via the top guide pipe 115 and the bottom guide pipe 116.

[0051] This utility model's technical solution utilizes the synergistic effect of the rigid flame-retardant layer 104, the flexible buffer layer 105, and the ceramic coating 106 of the multi-layer composite protective shell 100 to effectively buffer vibration while ensuring flame-retardant performance. Combined with the alumina insulating layer of the built-in ceramic separator 108 and the design of the copper heat-conducting wire 110, physical isolation between battery cells is achieved. The heat-conducting component 102 adopts a structure of a wrapped heat-conducting pipe 111 combined with a spiral groove 113 filled with phase change material, which, together with the heat dissipation fins 112, forms an efficient heat conduction path, significantly improving the overall heat dissipation efficiency of the battery system. Ultimately, under multiple protection mechanisms, it solves the problems of lifespan degradation and safety hazards caused by vibration and heat accumulation in existing massager batteries, while also taking into account thermal management and structural reliability in a compact space.

[0052] In this embodiment of the present invention, in the composite protective shell 100, the rigid flame retardant layer 104 includes an aluminum nitride reinforced polyether ether ketone material layer 118.

[0053] The flexible buffer layer 105 includes a polyurethane microporous foam material layer 119, and the contact surface between the flexible buffer layer 105 and the rigid flame retardant layer 104 is provided with a sawtooth interface 120.

[0054] The ceramic coating 106 includes a silicon nitride and aluminum oxide composite layer 121 coated on the flexible buffer layer 105;

[0055] The rigid flame-retardant layer 104 and the flexible buffer layer 105 are formed by hot pressing composite process, wherein a cross-linked adhesive 122 is pre-placed between the rigid flame-retardant layer 104 and the flexible buffer layer 105.

[0056] like Figure 3 As shown, the present invention uses an aluminum nitride-reinforced polyether ether ketone material to construct a rigid flame-retardant layer 104, which achieves UL94 V-0 flame-retardant performance while ensuring high mechanical strength. Combined with the honeycomb structure design of the polyurethane microporous foamed flexible buffer layer 105 and its sawtooth interface 120, it significantly improves vibration energy absorption efficiency and suppresses the risk of interlayer delamination.

[0057] The hot-pressing composite process, combined with the pre-placement strategy of cross-linked adhesive 122, enhances the interfacial bonding strength between the rigid and flexible layers, ensuring the overall structural integrity.

[0058] The silicon nitride-alumina composite ceramic coating 106 coated on the surface of the flexible layer achieves electrical isolation capability with a relatively thin thickness through the synergistic effect of the dual ceramic phases (silicon nitride for wear resistance and alumina for insulation). This ultimately forms a composite protection system with impact resistance, flame retardancy and noise reduction, and high insulation properties, effectively solving the problem of structural failure and thermal runaway propagation of the battery casing under vibration environment.

[0059] In this embodiment of the present invention, the structural extension direction of the ceramic separator 108 is perpendicular to the height direction of the battery cell unit 101;

[0060] The surface of the alumina insulating layer is uniformly distributed with micropores.

[0061] Multiple copper heat-conducting wires 110 are staggered in the thickness direction of the ceramic partition, and the ends of the copper heat-conducting wires 110 extend to the edge of the ceramic partition 108 to form heat-conducting terminals 124.

[0062] The surface of the copper heat-conducting wire 110 is coated with a nano boron nitride coating.

[0063] like Figure 4 As shown, the present invention maximizes the area of ​​the ceramic separator in a limited space by arranging the structural extension direction of the ceramic separator 108 perpendicular to the height direction of the cell unit 101 to improve the structural support stability, while reducing the overall thickness of the battery module.

[0064] The uniform microporous design on the surface of the alumina insulation layer adsorbs trace amounts of electrolyte vapor through capillary effect, reducing the accumulation of charge on the surface of the insulation layer and improving the insulation withstand voltage.

[0065] Copper heat-conducting wires 110, which are interleaved along the thickness of the ceramic separator, form a three-dimensional heat-conducting network. The heat-conducting terminals 124 extending from their ends are seamlessly connected to the external heat dissipation components, enabling the directional removal of heat from the battery cell.

[0066] The nano-boron nitride coating (50-100nm thick) covering the surface of the copper wire has both insulation and high thermal conductivity, ultimately forming a battery separator structure that integrates mechanical reinforcement, insulation protection and multi-directional heat dissipation, significantly improving thermal balance and safety under high-rate charge and discharge conditions.

[0067] In this embodiment of the present invention, the top guide pipe 115 and the bottom guide pipe 116 are diagonally distributed, and the top guide pipe 115 and the bottom guide pipe 116 are respectively provided with guide channels 126, and the guide channels 126 adopt a gradually shrinking structure.

[0068] like Figure 5 As shown, this technical solution optimizes the circulation efficiency of the internal airflow and reduces the flow dead zone by diagonally distributing the top guide pipe 115 and the bottom guide pipe 116.

[0069] The gradually contracting structure of the flow guide channel 126 adopts a large cross-section gentle slope design in the inlet section to suppress turbulence generation, and the outlet section achieves linear velocity increase through continuous decrease of cross-sectional area.

[0070] This design also utilizes the Bernoulli effect to enhance the uniformity of medium transport, and the pressure difference created by the diagonal layout drives the self-cleaning effect, effectively preventing particulate matter deposition and improving the speed of heat dissipation or pressure relief response. Ultimately, it achieves low-energy consumption and high-reliability directional flow and heat exchange balance in a compact space.

[0071] In this embodiment of the present invention, the heat pipe 111 includes a copper-graphene composite tube body 129, and an axial microchannel 130 is provided inside the heat pipe 111.

[0072] The cross-section of the spiral groove 113 is trapezoidal;

[0073] The surface of the spiral groove 113 is covered with a ceramic sealant layer 132, and the phase change material is filled between the ceramic sealant layer 132 and the spiral groove 113. The phase change material includes a tetradecane and expanded graphite composite 133.

[0074] like Figure 2 and 6 As shown, this technical solution constructs the main body of the heat pipe 111 through the copper-graphene composite tube 129, and combines it with the internal axial microchannels 130 (in one embodiment, the diameter of the axial microchannels 130 is 0.5 mm and the spacing is 2 mm) to form an axial high-speed heat conduction path, thereby reducing the axial thermal resistance.

[0075] The spiral groove 113 adopts a trapezoidal cross-section structure, and the contact area of ​​the phase change material is increased through geometric optimization (to improve and enhance the groove's resistance to shear deformation).

[0076] The ceramic sealant layer 132 covering the groove surface effectively encapsulates the tetradecane-expanded graphite composite phase change material. The porous framework of expanded graphite is used to suppress tetradecane phase change leakage. At the same time, through the synergistic effect of graphene-copper matrix and composite phase change material, the triple functions of rapid heat absorption, uniform heat storage and directional heat dissipation are achieved, which significantly improves the thermal management reliability in high load scenarios.

[0077] In this embodiment of the present invention, the heat dissipation fins 112 and the heat pipe 111 are connected by a tenon-and-mortise joint structure 134, the joint surfaces of the heat dissipation fins 112 and the heat pipe 111 are coated with liquid metal thermal paste, and the surface of the heat dissipation fins 112 is provided with honeycomb-shaped grooves 136.

[0078] like Figure 7 As shown, the mechanical interlock between the heat sink 112 and the heat pipe 111 is achieved through the tenon and mortise type plug-in structure 134, which maintains the stability of the contact surface under vibration environment and avoids fluctuations in contact thermal resistance caused by loosening.

[0079] The liquid metal thermal paste applied to the plug surface fully fills the micro gaps at the interface, improving thermal conductivity.

[0080] The honeycomb-shaped concave pattern 136 on the surface of the heat dissipation fins 112 increases the convective heat transfer area and induces turbulence, thereby improving the natural convection heat dissipation coefficient and ultimately achieving dual optimization of efficient heat conduction and structural reliability in high-power heat dissipation scenarios.

[0081] In one embodiment, the heat pipe 111 and the composite protective shell 100 are provided with wires or wire holes for electrical connection with the battery cell unit 101, so as to facilitate the electrical connection of the power battery structure of this utility model with other electronic components such as motors in the massager.

[0082] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A power cell structure for a massager, characterized by, It includes a composite protective shell (100), a battery cell unit (101), a heat-conducting component (102), and a current-conducting component (103). The composite protective shell (100) comprises a three-layer composite structure consisting of a rigid flame-retardant layer (104), a flexible buffer layer (105), and a ceramic coating (106) arranged sequentially from the outside to the inside; Multiple battery cells (101) are arranged inside a composite protective shell (100). A ceramic separator (108) is provided between adjacent battery cells (101). The surface of the ceramic separator (108) is provided with an aluminum oxide insulating layer, and a copper heat-conducting wire (110) is embedded inside the ceramic separator. The heat-conducting component (102) includes a heat-conducting pipe (111) covering multiple battery cells (101) and a ceramic separator (108). The outer wall of the heat-conducting pipe (111) is fixedly abutted against the inner cavity of the composite protective shell. Heat dissipation fins (112) are connected to both ends of the heat-conducting pipe (111). The surface of the heat-conducting pipe (111) is provided with a spiral groove (113), and the spiral groove (113) is filled with a phase change material. The flow guiding assembly (103) includes a top flow guiding pipe (115) and a bottom flow guiding pipe (116) respectively disposed on the top and bottom of the rigid flame retardant layer (104), and the top flow guiding pipe (115) and the bottom flow guiding pipe (116) are respectively connected to the internal cavity of the composite protective shell (100); In the composite protective shell (100), the rigid flame retardant layer (104) includes an aluminum nitride reinforced polyether ether ketone material layer (118). The flexible buffer layer (105) includes a polyurethane microporous foam material layer (119), and the contact surface between the flexible buffer layer (105) and the rigid flame retardant layer (104) is provided with a sawtooth interface (120). The rigid flame retardant layer (104) and the flexible buffer layer (105) are formed by hot pressing composite process, wherein a cross-linked adhesive (122) is pre-placed between the rigid flame retardant layer (104) and the flexible buffer layer (105). The structural extension direction of the ceramic separator (108) is perpendicular to the height direction of the battery cell (101); The surface of the alumina insulating layer is uniformly distributed with micropores. Multiple copper heat-conducting wires (110) are staggered in the thickness direction of the ceramic partition, and the ends of the copper heat-conducting wires (110) extend to the edge of the ceramic partition (108) to form heat-conducting terminals (124). The surface of the copper heat-conducting wire (110) is coated with a nano boron nitride coating; The top guide tube (115) and the bottom guide tube (116) are diagonally distributed. The top guide tube (115) and the bottom guide tube (116) are respectively provided with guide channels (126), and the guide channels (126) adopt a gradually shrinking structure. An axial microchannel (130) is provided inside the heat pipe (111). The groove cross-section of the spiral groove (113) is trapezoidal; The surface of the spiral groove (113) is covered with a ceramic sealant layer (132), and the phase change material is filled between the ceramic sealant layer (132) and the spiral groove (113); The heat dissipation fins (112) and the heat pipe (111) are connected by a tenon-and-mortise joint structure (134). The joint surfaces of the heat dissipation fins (112) and the heat pipe (111) are coated with liquid metal thermal paste. The surface of the heat dissipation fins (112) is provided with honeycomb-shaped grooves (136).

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