CN112953025A - Wireless charging device based on phase change heat dissipation - Google Patents
Wireless charging device based on phase change heat dissipation Download PDFInfo
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- CN112953025A CN112953025A CN202110345968.8A CN202110345968A CN112953025A CN 112953025 A CN112953025 A CN 112953025A CN 202110345968 A CN202110345968 A CN 202110345968A CN 112953025 A CN112953025 A CN 112953025A
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- charging device
- phase
- cavity
- charging
- wireless charging
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/005—Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a phase-change heat dissipation-based wireless charging device which comprises a charging device main body, a charging coil and a panel assembly, wherein the panel assembly is arranged on the charging device main body, the charging coil is arranged in the charging device main body corresponding to the panel assembly, the charging device also comprises a phase-change material assembly, a cavity is formed between the panel assembly and the charging coil, a ventilation structure is arranged on the cavity, and the phase-change material assembly is arranged in the cavity. The scheme provided by the invention can solve the problem that the high-power charging equipment cannot run at high power for a long time, reduces the extra heat power consumption of the charging coil on the equipment needing power, improves the charging efficiency, prolongs the high-power charging running time, and improves the reliability of the wireless charging equipment.
Description
Technical Field
The invention relates to the technical field of wireless charging, in particular to a heat dissipation technology of wireless charging.
Background
In order to meet the demand of people for increasing the wireless charging speed, the thermal power of the wireless charging equipment is continuously increased, and in order to ensure that the charging efficiency can maintain high-power charging efficiency for a longer time, the wireless charging equipment and the electric equipment can be ensured to keep a high-power state for a longer time through heat dissipation.
As shown in fig. 1, in the prior art, since the charging coil 2 of the wireless charging device is directly in contact with the panel 1, the charging coil is close to the electric device, the heating value of the charging coil is large during charging, the temperature is high (the temperature is higher than the temperature of the electric device), the electric device is heated, the temperature of the electric device is rapidly increased, the battery of the electric device rapidly reaches the thermal protection temperature (generally about 40 ℃), the electric device can automatically limit the charging current, and the charging speed is reduced.
Even if ventilation is performed between the wireless charging equipment and the electric equipment, the air volume of the fan cannot be increased due to space limitation, the wireless charging equipment and the electric equipment are heated simultaneously, air is heated continuously when flowing through gaps, the heat dissipation effect is limited, and the temperature cannot be reduced well; in addition, when the charging is carried out, the service life of the battery can be influenced or risks such as failure explosion and the like can be caused when the electric equipment is in a high-temperature environment for a long time.
Therefore, how to solve the problem that the high-power wireless charging device cannot operate at high power for a long time, reduce the extra heat power consumption of the charging coil for the electric device, improve the charging efficiency of the wireless charging device, and prolong the high-power charging operation time is a problem that needs to be solved urgently by technical personnel in the field.
Disclosure of Invention
The invention aims to provide a wireless charging device based on phase change heat dissipation, aiming at solving the problems of the existing wireless charging technology in the aspect of heat dissipation, which can effectively improve the heat dissipation effect of the wireless charging device and enable the high-power wireless charging device to run at high power for a long time.
In order to achieve the purpose, the wireless charging device based on phase change heat dissipation comprises a charging device main body, a charging coil and a panel assembly, wherein the panel assembly is arranged on the charging device main body, the charging coil is arranged in the charging device main body corresponding to the panel assembly, the charging device further comprises a phase change material assembly, a cavity is formed between the panel assembly and the charging coil, a ventilation structure is arranged on the cavity, and the phase change material assembly is arranged in the cavity.
Furthermore, the cavity is made of non-metal materials such as plastics, and air holes are formed in the cavity close to the top.
Further, the phase change material component is made of paraffin materials.
Further, the phase change material component is poured into the cavity from a liquid state and a certain gap is reserved.
Furthermore, the ventilation structure can be composed of ventilation holes, and the ventilation holes are provided with ventilation films.
According to the phase-change heat dissipation-based wireless charging device, the characteristic that the temperature is not changed when the phase-change material is in a phase change state is utilized, so that the heating device is kept at a lower constant temperature within a certain time, the problem that high-power charging equipment cannot run at high power for a long time is solved, the extra heat power consumption of the charging coil on the equipment needing power is reduced, the charging efficiency is improved, the high-power charging running time is prolonged, and the reliability of the wireless charging equipment is improved.
Drawings
The invention is further described below in conjunction with the appended drawings and the detailed description.
Fig. 1 is a schematic structural diagram of a conventional wireless charging device;
fig. 2 is a schematic overall structure diagram of the phase-change heat dissipation-based wireless charging device in this example;
fig. 3 is an exploded view of the wireless charging device based on phase change heat dissipation in this example.
The reference numbers in the figures mean:
FIG. 1: a panel 1 and a cavity 2;
fig. 2 and 3: the wireless charging device comprises a wireless charging device 10, a charging device main body 11, a charging coil 12, a panel assembly 13, a phase change material assembly 14, a cavity 15, an air hole 16 and a breathable film 17.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
Aiming at the problems of the existing wireless charging equipment in the aspect of heat dissipation, the heat dissipation scheme suitable for the wireless charging equipment is constructed based on the phase-change material in the embodiment innovation mode, the heat dissipation scheme is characterized in that the phase-change material can absorb a large amount of heat during phase change, meanwhile, the temperature is kept unchanged, the heat generated during wireless charging is absorbed, the temperature of a heat source is stabilized, the temperature rise speed of the heat source is delayed, and therefore the problem that the high-power charging equipment cannot run at high power for a long time is solved.
Referring to fig. 2 and fig. 3, there are shown configuration example schemes of a wireless charging device based on phase change heat dissipation according to the above principle.
As can be seen from the figure, the wireless charging device 10 mainly includes several parts, namely, a charging device main body 11, a charging coil 12, a panel assembly 13, and a phase change material assembly 14.
The charging device body 11 constitutes a main structure of the entire wireless charging device, and carries various components required by the wireless charging device. The specific structural form is not limited herein, and can be determined according to actual requirements.
Here, the charging coil 12 is provided in the charging device main body 11 as a main component of wireless charging. The charging coil 12 can be configured according to actual requirements, and a coil structure meeting high-power charging requirements is adopted.
In this embodiment, the specific structure of the panel assembly 13 is not limited, and only the above requirements are satisfied.
On the basis, a cavity 15 is formed between the panel assembly 13 and the charging coil 12, and the corresponding phase change material assembly 14 is arranged in the cavity 15; meanwhile, the cavity 15 is provided with a corresponding ventilation structure.
In the scheme of the embodiment, the cavity 15 is arranged between the panel assembly 13 and the charging coil 12, the phase-change material assembly 14 is filled in the cavity 15, and the phase change of the phase-change material assembly 14 is utilized to absorb heat generated by the charging coil 12 during working, so that the temperature of a heat source is stabilized, the heating speed of the heat source is delayed, the heat transfer of wireless charging equipment to electric equipment is reduced, the charging efficiency of the electric equipment is improved, and the high-power charging time is prolonged; meanwhile, the characteristic that the temperature is unchanged when the phase change material is subjected to phase change is utilized, so that the charging coil can keep a lower constant temperature within a certain time.
In some embodiments of the present example, the cavity 15 preferably covers the entire charging coil 12.
This cavity 15 comprises corresponding cell body structure and the cooperation of panel subassembly 13, forms corresponding cavity structure in this panel subassembly 13 embedding cell body, adopts sealed glue to seal peripheral region after the embedding simultaneously, forms a sealed all around, carries out ventilative cavity structure simultaneously through bleeder vent 16.
The groove body part of the cavity 15 is preferably made of non-metallic materials such as plastics, and the wireless charging performance is prevented from being influenced. An air vent 16 is arranged in the cavity close to the top and used for filling liquid phase change materials, and then the air vent 16 is covered by a breathable film.
At least one ventilation hole 16 is formed on the back surface of the cavity 15 formed in this way, and a corresponding ventilation film 17 is arranged on the corresponding ventilation hole 16, so that a corresponding ventilation structure is formed.
The air permeable membrane 17 is formed by expanding and stretching polytetrafluoroethylene, the stretched polytetrafluoroethylene membrane forms a net-shaped structure in three dimensions, and the surface of the membrane has more than 90 hundred million micropores per square inch. The diameter of the micropores is kept between 0.1 and 3.0 micrometers (0.1 to 3.0X 10-6m) by corresponding stretching. Is far more than 10000 times smaller than water drops, so that the ePTFE membrane has excellent water resistance (exceeding the waterproof requirement of IP67 standard), and the minimum water drops (light fog) can not pass through the membrane. Meanwhile, the diameter of the micropores is more than 700 times larger than that of water vapor molecules.
The formed breathable film 17 has the performances of super water resistance, oil resistance, dust resistance, bacteria resistance and the like, and can allow gas molecules to easily pass through micropores on the film, so that the function of ventilation and air pressure balance is realized. Therefore, negative pressure water absorption caused by the influence of gas expansion and gas compression stress can be eliminated based on the breathable film, and the problem of mist is solved.
Specifically, the air permeable film 17 is preferably attached to the air holes 16.
In this example, the breathable film 17 is matched with the breathable holes 16 to form a breathable structure, which can be used for matching with thermal expansion and cold contraction of the phase change material assembly 14 to prevent the cavity 15 from deforming. When the electric product is charged wirelessly, the breathable film on the breathable hole can play a role of a pressure valve, when the phase-change material in the cavity is heated and liquefied, the volume of the phase-change material expands, air in the cavity is exhausted through the breathable material, the internal pressure is reduced, more space is reserved, and therefore the expansion and deformation of the cavity are prevented; when the charging is finished, the phase-change material is slowly recovered to be solid from the liquid state, the external air can be introduced, and the cavity is prevented from being deformed due to the shrinkage of the phase-change material.
In some embodiments of the present example, the phase change material component 14 is filled inside the cavity 15 for absorbing heat emitted during wireless charging. The phase-change material 14 is preferably a paraffin material, which has the characteristics of high phase-change latent heat, almost no supercooling phenomenon, low vapor pressure during melting, difficult chemical reaction, good chemical stability and low price. The solid-liquid phase temperature is in the range of 30-50 ℃, and the specific phase transition temperature can be adjusted by adjusting the formula. Meanwhile, the phase change material 14 is filled into the cavity in a liquid state, a certain gap is reserved, and the breathable film cannot be submerged after the phase change material is completely liquefied.
According to the wireless charging equipment formed by the specific scheme, the characteristics that the phase-change material can absorb a large amount of heat during phase change and the temperature is kept unchanged can be utilized, the heat emitted during wireless charging is absorbed, the temperature of a heat source is stabilized, and the temperature rising speed of the wireless charging equipment is delayed. By way of example, in a specific application, the panel assembly 11 and the internal cavity 15 are combined together, fixed on the charging device body 11, and correspondingly covered on the charging coil 12 arranged in the charging device body 11.
Therefore, heat generated by the charging coil 12 during working is preferentially transferred to the internal cavity 15, the heat of the cavity 15 is transferred to the internal phase-change material 14, the phase-change material 14 absorbs heat and changes phase, and meanwhile, the temperature is kept unchanged, so that the heat generated during wireless charging is absorbed, and the temperature of a heat source is stabilized; meanwhile, after the phase change of the phase change material 14, the volume is expanded, redundant air in the cavity is extruded, the redundant air is exhausted through the air permeable film 17, and after the temperature of the phase change material 14 is reduced, the air returns to the cavity 15 through the air permeable film 17.
This example provides a wireless charging device based on phase transition heat dissipation, on original forced air cooling's basis, application phase change material heat absorption principle, absorb unnecessary heat, reduce the heat transfer of battery charging outfit to consumer, improve consumer charge efficiency, extension high power charge time, when utilizing the phase transition material phase transition, the unchangeable characteristic of temperature for the device that generates heat keeps lower constant temperature in the certain time, applicable higher in various power, the heat dissipation environment is relatively poor, the single heat dissipation of heat dissipation form is used.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The utility model provides a wireless charging device based on phase transition heat dissipation, includes charging device main part, charging coil, panel components, the panel components sets up in the charging device main part, the charging coil sets up in the charging device main part corresponding to the panel components, a serial communication port, charging device still includes the phase change material subassembly, be formed with a cavity between panel components and the charging coil, be equipped with ventilative structure on the cavity, the phase change material subassembly sets up in the cavity.
2. The phase-change heat dissipation based wireless charging device as claimed in claim 1, wherein the cavity is made of a non-metallic material such as plastic, and air holes are formed in the cavity near the top.
3. The phase-change heat dissipation based wireless charging device according to claim 1, wherein the phase-change material component is made of paraffin-based material.
4. The phase-change heat dissipation based wireless charging device as claimed in claim 1, wherein the phase-change material component is poured into the cavity in a liquid state and a gap is reserved.
5. The wireless charging device based on phase-change heat dissipation of claim 1, wherein the ventilation structure comprises a ventilation hole, and a ventilation film is disposed on the ventilation hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110345968.8A CN112953025A (en) | 2021-03-31 | 2021-03-31 | Wireless charging device based on phase change heat dissipation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110345968.8A CN112953025A (en) | 2021-03-31 | 2021-03-31 | Wireless charging device based on phase change heat dissipation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112953025A true CN112953025A (en) | 2021-06-11 |
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ID=76231195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110345968.8A Pending CN112953025A (en) | 2021-03-31 | 2021-03-31 | Wireless charging device based on phase change heat dissipation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112953025A (en) |
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2021
- 2021-03-31 CN CN202110345968.8A patent/CN112953025A/en active Pending
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