A battery life phone case

Abstract

The utility model discloses a kind of endurance mobile phone shell, comprising: shell, including shell bottom, battery compartment and function module compartment are integrated in the shell bottom inside, the inner wall of battery compartment and / or function module compartment is equipped with convex point structure;Wireless charging and discharging module, built-in in the function module compartment, for with mobile phone signal connection;Battery module, built-in in the battery compartment, through connecting line row with the wireless charging and discharging module signal connection;Multi-layer composite protective sheet, cover between the battery module and the shell inner wall.The integrated power supply function's mobile phone protective shell structure, realize the zoning arrangement of multifunction module, the active inhibition of battery thermal runaway risk and the mechanical stability leap under composite stress scene, fundamentally break the bottleneck of safety and functionality mutual exclusion in prior art.

Description

Technical Field

[0001] This utility model relates to the field of mobile terminal accessories technology, specifically to a mobile phone case for extending battery life. Background Technology

[0002] Current phone cases with external batteries generally suffer from structural and safety defects. Traditional solutions stack the battery and wireless charging module in a single-layer cavity, causing the battery to be directly exposed to the coil's heating area during charging and discharging, leading to the risk of uncontrolled temperature rise. Existing heat dissipation designs use a single layer of metal foil or silicone pads for insulation, which can locally alleviate heat conduction but weakens impact resistance. In drop scenarios, structural deformation can easily cause battery puncture and short circuit.

[0003] Furthermore, the magnetic positioning of wireless charging modules typically uses a single magnet, which cannot avoid charging efficiency degradation caused by coil misalignment, and the magnet is prone to detachment after repeated disassembly and reassembly. These issues collectively limit the safety and reliability of phone cases designed for extended battery life. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a phone case with extended battery life, which solves the problems of low safety and reliability of traditional phone cases with extended battery life through composite structure and mechanical protection.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0006] This utility model provides a phone case for extending battery life, comprising:

[0007] The housing includes a bottom, the bottom of which integrates a battery compartment and a functional module compartment, and the inner wall of the battery compartment and / or the functional module compartment is provided with a protruding structure.

[0008] A wireless charging and discharging module, built into the functional module compartment, is used to connect to the mobile phone signal;

[0009] The battery module is built into the battery compartment and is connected to the wireless charging and discharging module via a connecting cable strip;

[0010] A multi-layered composite protective sheet is placed between the battery module and the inner wall of the housing.

[0011] In some embodiments, the molding material of the housing is a composite material of aramid fiber and glass fiber.

[0012] In some embodiments, the multilayer composite protective sheet includes:

[0013] A heat-dissipating graphene layer closely attached to the battery module;

[0014] An aerogel insulation layer covering the heat-dissipating graphene layer;

[0015] The outermost aramid puncture-resistant layer has an L-shaped edging that extends from its edge to cover the side edges of the battery module.

[0016] In some embodiments, the battery module is further provided with a ring-shaped magnetic array, which is mounted on the outer periphery of the battery module. The ring-shaped magnetic array is composed of 16 sector-shaped neodymium iron boron magnets arranged in a circumferentially spaced manner, with the magnets having alternating polarities.

[0017] In some embodiments, the wireless charging and discharging module includes a planar coil assembly adapted to the back of a mobile phone, an epoxy resin insulating layer encapsulating the planar coil assembly, and a magnetic shielding sheet disposed at the bottom of the epoxy resin insulating layer.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] In this application, the casing is equipped with an independent battery compartment and a functional module compartment, which physically isolates the battery from the wireless charging heat source and blocks the direct heat transfer path. At the same time, the inner wall of the battery compartment is designed with a convex structure, which provides a deformation buffer space for the battery when it expands due to heat during charging, and guides the heat to dissipate in a set direction through the structure of the wave groove.

[0020] The multi-layer composite protective sheet creatively integrates heat dissipation, heat insulation, and puncture resistance functions in layers: the heat-dissipating graphene layer quickly conducts heat from the battery surface, the aerogel heat insulation layer blocks the bidirectional conduction of external heat sources and internal heat, and the aramid puncture-resistant layer strengthens the impact resistance of the battery's edges with an L-shaped edge structure. These three different functional layers form a dual protective barrier of temperature and mechanics. The shell is made of a mixed aramid and glass fiber material with high modulus characteristics, which enables the shell to produce a low deformation response when subjected to external forces. Together with the protrusion structure, it suppresses the displacement of internal components and ensures the structural integrity for long-term use.

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0022] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of a mobile phone case for extending battery life, provided in an embodiment of this application.

[0024] Figure 2This is a perspective view of the internal structure of a mobile phone case for extending battery life, provided as an embodiment of this application.

[0025] Figure 3 This is a cross-sectional view of a battery-saving mobile phone case provided in an embodiment of this application from a top view.

[0026] Figure 4 This is a schematic diagram illustrating the connection status between the wireless charging / discharging module and the battery module provided in an embodiment of this application.

[0027] Figure 5 This is a schematic diagram showing the connection status of the multilayer composite protective sheet and the battery module provided in the embodiments of this application. Detailed Implementation

[0028] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may not be directly connected to the other devices but may have an intermediary device.

[0031] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0032] Reference Figures 1 to 5 This embodiment proposes a phone case for extending battery life, characterized by comprising:

[0033] The housing 10 includes a bottom 11, and the bottom 11 integrates a battery compartment 12 and a functional module compartment 13. The inner wall of the battery compartment 12 and / or the functional module compartment 13 is provided with a protrusion structure 14.

[0034] The wireless charging and discharging module 20 is built into the functional module compartment 13 and is used to connect to the mobile phone signal;

[0035] The battery module 30 is built into the battery compartment 12 and is connected to the wireless charging and discharging module 20 via the connecting cable 23.

[0036] A multi-layer composite protective sheet 40 is placed between the battery module 30 and the inner wall of the housing 10.

[0037] It should be noted that the battery compartment 12 and the functional module compartment 13 are formed by injection molding at the bottom of the housing 10. The battery compartment 12 is used to accommodate the battery module 30, and the functional module compartment 13 is used to accommodate the wireless charging and discharging module 20. The two compartments may optionally have protrusion structures 14 on their inner walls. Preferably, wherein:

[0038] The protrusion structure 14 on the inner wall of the battery compartment 12 forms a wave-shaped groove structure. First, it provides a deformation buffer space for the battery during charging and discharging expansion. The height of the protrusion structure 14 is 0.3mm. Second, the wave-shaped groove structure guides heat to dissipate in a set direction. For example, the protrusion structure 14 can be designed as an array of different heights. The first array has a uniform height and abuts against the battery. The second array is lower than the first array. A wave-shaped groove is formed below the abutting plane constructed by the first array, which is conducive to the conduction of heat from the battery side to the groove and guides the heat to dissipate in a set direction.

[0039] The protrusion structure 14 on the inner wall of the functional module compartment 13 forms a protruding limiting post, which effectively limits and fixes the control circuit board to prevent vibration displacement.

[0040] The wireless charging / discharging module 20 and the battery module 30 are connected by a connecting line 23. The wireless charging / discharging module 20 controls the charging / discharging logic. Furthermore, the connecting line 23 is a double-sided copper-clad flexible circuit board with serpentine traces. An S-shaped stress buffer section is set at its bend. The S-shaped stress buffer section can effectively cope with the heat generation during the charging / discharging process and avoid the potential connection failure during multiple charging / discharging processes.

[0041] In one embodiment, the shell 10 is made of a composite material of aramid fiber and glass fiber, wherein aramid fiber accounts for 60% to provide tear resistance and glass fiber accounts for 40% to enhance structural stiffness. The molding process is carried out at a high temperature of 135°C, which allows the two types of fibers to melt and cross-link to form a continuous reinforcing phase.

[0042] It should be noted that the shell 10, which is made of aramid fiber and glass fiber composite, has an elastic modulus >20GPa. The shell 10 produces a low deformation response when subjected to external force. Therefore, when the battery expands during charging and discharging or is subjected to impact, the raised part of the bump structure 14 forms a rigid support skeleton. The high modulus substrate resists the expansion stress and compresses the displacement of the battery module 30 to the micrometer level. Compared with the traditional solution, the ordinary TPU shell 10 (modulus of about 0.5GPa) will produce a deformation of >0.5mm when the battery expands, which will cause the coil module to separate from the contact surface of the mobile phone.

[0043] Combination Figure 5 Preferably, the multi-layer composite protective sheet 40 includes:

[0044] A heat-dissipating graphene layer 41 is closely attached to the battery module 30;

[0045] Aerogel insulation layer 42 covered with heat-dissipating graphene layer 41;

[0046] The outermost aramid puncture-resistant layer 43 is provided, and the edge of the aramid puncture-resistant layer 43 extends into an L-shaped edging 44, which covers the side edge of the battery module 30.

[0047] The heat-dissipating graphene layer 41, the aerogel insulation layer 42, and the aramid puncture-resistant layer 43 are stacked sequentially. The heat-dissipating graphene layer 41 is closely attached to the battery module 30, and its in-plane thermal conductivity is >1500W / m·K, which can quickly dissipate the battery heat. The aerogel insulation layer 42 covers the graphene layer and uses a nanoporous structure to block the transfer of external high temperature (such as coil heating) to the battery. The L-shaped edge 44 extending from the edge of the aramid puncture-resistant layer 43 has a coverage height ≥50% of the battery thickness. When the corner of the shell 10 is impacted, the edge disperses the impact energy through interlayer shear.

[0048] As one implementation, it also includes a ring magnetic array 50, which is mounted on the outer periphery of the battery module 30. The ring magnetic array 50 is composed of 16 fan-shaped neodymium iron boron magnets arranged in a circumferentially spaced manner, with the magnets having alternating polarities.

[0049] The annular magnetic array 50 is embedded around the battery module 30, corresponding to the area below the planar coil group 21. Sixteen sector-shaped neodymium iron boron magnets are arranged alternately in an NSNS sequence in a ring. The alternating polarity layout concentrates the magnetic lines of force at the center of the back of the phone, improving the wireless charging coupling efficiency.

[0050] Specifically, the wireless charging and discharging module 20 includes a planar coil group 21 adapted to the back of the mobile phone, an epoxy resin insulating layer encapsulating the planar coil group 21, and a magnetic shielding sheet disposed at the bottom of the epoxy resin insulating layer. The planar coil group 21 is positioned to fit the back of the mobile phone and is wound into a DD-type coil with a diameter of 28mm by laying copper wire. Then, a 0.1mm epoxy resin insulating layer is wrapped around the planar coil group 21 for encapsulation. After encapsulation, its withstand voltage value is >3kV. In addition, a magnetic shielding sheet is also provided, preferably made of permalloy, whose high magnetic permeability suppresses leakage magnetic interference.

[0051] Of course, the wireless charging and discharging module 20 also includes a control module 22. The control module 22 is connected to the battery module 30 via a connecting busbar 23, and the planar coil group 21 is connected to the control module 22. The planar coil group 21 is used to adapt to external power devices, while the control module 22 is used to control the working state of the planar coil group 21, specifically, whether the planar coil group 21 is in a charging or discharging state. If it is in a charging state, the planar coil group 21 is coupled to an external power device; if it is in a discharging state, the planar coil group 21 is coupled to a mobile phone.

[0052] In summary, compared with the prior art, the above embodiments have at least the following technical advantages:

[0053] The housing 10 is equipped with an independent battery compartment 12 and a functional module compartment 13, which physically isolates the battery from the wireless charging heat source and blocks the direct heat transfer path. At the same time, the inner wall of the battery compartment 12 is designed with a convex structure 14, which provides a deformation buffer space for the battery when it expands due to heat during charging, and guides the heat to dissipate in a set direction through the structure of the wave groove.

[0054] The multi-layer composite protective sheet 40 creatively integrates heat dissipation, heat insulation, and puncture resistance functions in layers: the heat dissipation graphene layer 41 quickly conducts heat from the battery surface, the aerogel heat insulation layer 42 blocks the bidirectional conduction of external heat sources and internal heat, and the aramid puncture-resistant layer 43 strengthens the impact resistance of the battery's edges with an L-shaped edge 44 structure. These three different functional layers form a dual protective barrier of temperature and mechanics. The shell 10 is made of a mixed aramid and glass fiber material with high modulus characteristics, which enables the shell 10 to produce a low deformation response when subjected to external force. Together with the protrusion structure 14, it suppresses the displacement of the internal components of the shell 10, ensuring the structural integrity for long-term use.

[0055] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A phone case for extending battery life, characterized in that, include: The housing includes a bottom, the bottom of which integrates a battery compartment and a functional module compartment, and the inner wall of the battery compartment and / or the functional module compartment is provided with a protruding structure. A wireless charging and discharging module, built into the functional module compartment, is used to connect to the mobile phone signal; The battery module is built into the battery compartment and is connected to the wireless charging and discharging module via a connecting cable strip; A multi-layered composite protective sheet is placed between the battery module and the inner wall of the housing.

2. The phone case for extended battery life as described in claim 1, characterized in that, The shell is made of a composite material of aramid fiber and glass fiber.

3. The phone case for extended battery life as described in claim 1, characterized in that, The multi-layer composite protective sheet includes: A heat-dissipating graphene layer closely attached to the battery module; An aerogel insulation layer covering the heat-dissipating graphene layer; The outermost aramid puncture-resistant layer has an L-shaped edging that extends from its edge to cover the side edges of the battery module.

4. A phone case for extended battery life as described in claim 1, characterized in that, It also includes a ring magnetic array, which is installed on the outer periphery of the battery module. The ring magnetic array is composed of 16 sector-shaped neodymium iron boron magnets arranged in a circle at equal intervals, and the polarity of the magnets is alternately distributed.

5. A phone case for extended battery life as described in claim 4, characterized in that, The wireless charging and discharging module includes a planar coil assembly adapted to the back of the mobile phone, an epoxy resin insulating layer encapsulating the planar coil assembly, and a magnetic shielding sheet disposed at the bottom of the epoxy resin insulating layer.

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