KR101682814B1

KR101682814B1 - self generation electricity type of charging device using multi heating source in portable electronic devices and therefore power providing method

Info

Publication number: KR101682814B1
Application number: KR1020150091729A
Authority: KR
Inventors: 차진환
Original assignee: 차진환
Priority date: 2015-06-29
Filing date: 2015-06-29
Publication date: 2016-12-05

Abstract

A self-generated charging device for a portable electronic device such as a smart phone is disclosed. The self-generated charging device of the portable electronic device includes a heat dissipation plate having a heat dissipating structure for facilitating cooling and mounted on a protective case of the portable electronic device, an endothermic structure for assisting absorption of the multi-heating source, A thermoelectric generator part for generating thermoelectric power by using a thermoelectric generation effect using a thermoelectric effect by a temperature difference between the heat absorption plate and the heat radiation plate; And a power storage unit that stores electricity and supplies the stored power as driving power for the portable electronic device.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-generated charging device for a portable electronic device using a multi-heating source, and a self-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to charging a portable electronic device such as a smart phone, and more particularly, to a self-generated charging device for a portable electronic device capable of using various external heat sources for self-power generation and a self-generated power supply method therefor.

Generally, portable electronic devices such as smart phones have batteries for the operation of internal components. Such a battery must be charged at a constant voltage level or higher to provide operating power.

When a battery is charged by using an external power source, a charger or an adapter is required, which is a hassle in carrying the battery.

Therefore, a thermoelectric power generation technique for charging a battery of a portable electronic device by performing thermoelectric power generation using various body type charging schemes, for example, human body temperature or an external heat source, is also known. However, circuit elements such as a rectifying part and a current sensor are required for charging, and a temperature difference between the heat absorbing part and the heat generating part is relatively weak, and it is difficult to charge a necessary amount of electric power.
Japanese Unexamined Patent Application Publication No. 2005-310847 discloses a thermoelectric conversion device comprising a thermoelectric generator unit including a heat absorbing member, a thermoelectric conversion element, and a heat radiating member, and a battery for accumulating electric power generated by the thermoelectric generator unit, Is disclosed.

There is a need for an improved technique that can utilize a multi-heating source without being restricted to a place or a specific heat source, and to carry out self-generated charging of a portable electronic device more practically and efficiently.

An object of the present invention is to provide a self-generated charging device for a portable electronic device that uses various heat sources for self-power generation and can increase power generation efficiency, and a method for supplying power to the self-generated power.

According to one aspect of the present invention, there is provided a self-generated charging device for a portable electronic device,

A heat dissipating plate having a heat dissipating structure for facilitating cooling and mounted on a protective case of a portable electronic device;

An endothermic plate having an endothermic structure for assisting absorption of a multi-heating source, the endothermic plate being spaced apart from the heat-dissipating plate and mounted on the protective case;

A thermoelectric generator part for performing a thermoelectric power generation by using a whitening effect due to a temperature difference between the heat absorbing plate and the heat radiation plate; And

And a power storage unit that stores electricity generated by the thermoelectric generator unit and supplies the stored electricity as driving power for the portable electronic device.

According to another aspect of the present invention, there is provided a self-generated charging device for a portable electronic device,

A heat dissipating plate having a heat dissipating structure for facilitating cooling and mounted on a main body back cover of a portable electronic device;

An endothermic plate having an endothermic structure for assisting absorption of a multi-heating source, the endothermic plate being spaced apart from the heat-dissipating plate and mounted on the main body back cover;

According to an embodiment of the present invention, the cooling device may further include a cooling element positioned between the main body back cover and the heat dissipation plate for air-cooling the heat dissipation plate by a heat dissipation fan.

According to an embodiment of the present invention, the heat absorbing plate may have an embossed surface structure of a material having a high thermal conductivity.

According to an embodiment of the present invention, the heat dissipation plate may be formed of a thin plate heat sink including at least one of silver, copper, gold, aluminum, magnesium, zinc, nickel, iron, and tin.

According to an embodiment of the present invention, the main body back cover may include a heat sink of an aluminum sheet or a copper sheet on the bottom surface of the back cover to dissipate heat generated from the portable electronic device.

According to the embodiment of the present invention, the thermoelectric generator part may include a semiconductor module in which a plurality of pairs (pairs) of a p-type semiconductor and an n-type semiconductor are alternately formed.

According to an embodiment of the present invention, the power storage unit may include an electric double layer capacitor (EDLC) type super capacitor.

The apparatus may further include a thermoelectric energy harvesting circuit unit that receives electricity generated by the thermoelectric generator unit and performs MPPT (Maximum Power Point Tracking) control to provide the thermoelectric energy harvesting circuit unit to the power storage unit.

According to an embodiment of the present invention, the main body back cover may have a heat sink structure for emitting heat generated from the portable electronic device.

According to another aspect of an embodiment of the present invention for solving the above-mentioned problems, a method of supplying power for self-

A thermoelectric generator part for performing thermoelectric generation using a whitening effect between an endothermic plate for absorbing heat from a multi-heating source and a heat radiating plate for performing a heat emission function is installed in a cover or a protective case of a portable electronic device;

Forming a temperature difference such that the temperature of the heat-absorbing plate is higher than the temperature of the heat-radiating plate by absorbing the heat source through the heat-absorbing plate when the portable electronic device is located in an arbitrary heat source;

Generating electricity through the thermoelectric generator part based on the formed temperature difference;

And stores the generated electricity in a super capacitor to provide the generated electricity as operating power for the portable electronic device.

According to the embodiment of the present invention as described above, there is an effect of performing self-power charging of the portable electronic device more efficiently by using various external heat sources.

1 is a block diagram of a self-generated charging device for a portable electronic device according to an embodiment of the present invention.
Figure 2 is an exemplary cross-sectional view according to Figure 1;
Fig. 3 is a view exemplarily showing a rear surface shape of the portable electronic device related to Fig. 1. Fig.
Fig. 4 is a view exemplarily showing the shape of the protective case of the portable electronic device related to Fig. 1. Fig.
5 is a view illustrating an example of a supercapacitor in the power storage unit of FIG.
6 is a diagram illustrating examples of a multi-heating source according to the present invention.
Fig. 7 is a view showing an exemplary shape of the heat absorbing plate of Fig. 1;
Fig. 8 is a view showing an exemplary shape of the heat dissipation plate of Fig. 1;

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, and advantages of the present invention will become more apparent from the following description of preferred embodiments with reference to the attached drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art, without intention other than to provide an understanding of the present invention.

In this specification, when it is mentioned that some element or lines are connected to a target element block, it also includes a direct connection as well as a meaning indirectly connected to the target element block via some other element.

In addition, the same or similar reference numerals shown in the drawings denote the same or similar components as possible. In some drawings, the connection relationship of elements and lines is shown for an effective explanation of the technical contents, and other elements or functional blocks may be further provided.

Each of the embodiments described and exemplified herein may also include its complementary embodiments and the details of the basic operation of the portable electronic device and the details of the circuit blocks therein are not described in detail in order to avoid obscuring the gist of the present invention Please note.

1 is a block diagram of a self-generated charging device for a portable electronic device according to an embodiment of the present invention.

1, the self-generated charging device includes a cooling device 500, a heat dissipating plate 210, a thermoelectric generator 220, an endothermic plate 230, a harvesting circuit 250, and a power storage 300, . &Lt; / RTI >

The heat dissipation plate 210 has a heat dissipation structure for quickly assisting cooling, and can be mounted on a protective case or a main body back cover of a portable electronic device. Herein, the protective case refers to a separate case enclosing the portable electronic device to protect the portable electronic device from external physical impact. Further, the main body back cover means a rear cover which can be separated and attached for battery replacement of the portable electronic device itself. The heat dissipation plate 210 may be formed of a thin plate heat sink including at least one of silver, copper, gold, aluminum, magnesium, zinc, nickel, iron, and tin.

The heat absorbing plate 230 has an endothermic structure for quickly absorbing the multi-heating source 240 and may be mounted on the protective case or the main body back cover at a distance from the heat dissipating plate 210. The heat absorbing plate 230 may have an embossed surface structure of a material having a high thermal conductivity. For example, the heat absorbing plate 230 may have a dimple type surface structure made of aluminum or a copper thin plate coated with nickel.

The thermoelectric generator part 220 performs thermoelectric generation using a whitening effect due to a temperature difference between the heat absorbing plate 230 and the heat dissipation plate 210. The thermoelectric generator part 220 may include a semiconductor module in which a plurality of pairs (pairs) of a P-type semiconductor and an N-type semiconductor are alternately formed.

The power storage unit 300 stores electricity generated by the thermoelectric power generation unit 220 and supplies the stored electricity as driving power for the portable electronic device.

The cooling element 500 functions to air-cool the heat-dissipating plate 210 by a heat-dissipating fan. The cooling device 500 may include a small-sized motor having low-noise and low-power consumption characteristics and a heat-dissipating fan installed in a rotating shaft of the motor. The temperature difference between the heat absorbing plate 230 and the heat dissipating plate 210 is further increased as the heat dissipation plate 210 is rapidly dissipated by the cooling function of the cooling element 500. As a result, the greater the temperature difference, the more the efficiency of self-generation is maximized or increased.

The harvesting circuit 250 receives power generated by the thermoelectric generator 220 and performs MPPT (Maximum Power Point Tracking) control to provide the power to the power storage unit 300. The harvesting circuit 250 may be installed at the rear end of the power storage unit 300. However, the harvesting circuit 250 may be installed at the rear end of the power storage unit 300 .

The protective case and the main body back cover may have a heat sink of an aluminum thin plate or a copper thin plate on the bottom surface to dissipate heat generated from the portable electronic device by itself.

The multi-heating source 240 is not a functional block constituting the self-generated charging device, but refers to various external heat sources. The various external heat sources can vary widely depending on where the portable electronic device is raised. The heat source of the user may include contact heat, external atmospheric radiation, a heat source generated from a heater or a heating device, or a heat source generated from electronic equipment or equipment.

As described above, when the temperature difference between the heat absorbing plate 230 and the heat dissipating plate 210 is maximized or increased by using a multi-heating source without being limited to a place or a specific heat source, the self-generated charge of the portable electronic device is more effectively and efficiently .

Figure 2 is an exemplary cross-sectional view according to Figure 1; 2 shows an example in which the self-generated charging device is housed in a protective case of a portable electronic device.

2, the housing 200 of the protective case includes a cooling element 500, a heat dissipating plate 210, a thermoelectric element 220, a heat absorbing plate 230, and a power storage 300, have.

Reference numeral 110 denotes a heat dissipation fin constituting a heat sink, and a heat sink having heat dissipation fins 110 dissipates heat generated from a portable electronic device by itself. The heat sink may have a structure in which a plurality of heat dissipation fins are formed on an aluminum thin plate or a copper thin plate.

Reference numeral 120 may include a USB power port as a power connector or connection pin connected to the portable electronic device.

The cooling element 500 may be installed at a central portion of the housing 200 to perform a cooling function.

The heat dissipation plate 210 may include a plurality of heat dissipation fins 212 forming a heat sink.

The heat absorbing plate 230 may have a plurality of contact portions 232 whose surfaces are embossed.

The thermoelectric power generation unit 220 performs the thermoelectric power generation by using the whitening effect due to the temperature difference between the heat absorbing plate 230 and the heat dissipation plate 210. The thermoelectric generator part 220 may include a semiconductor module including a plurality of pairs (pairs) of a p-type semiconductor and an n-type semiconductor.

The p-type semiconductor 221 and the n-type semiconductor 223 are connected to each other through the low-temperature electrode 222 and the high-temperature electrode 224 to form one unit pn junction pair.

The p-type semiconductor 221 located at the left edge portion is connected to the positive electrode terminal of the supercapacitor 310 through the power supply line L20 and the n-type semiconductor 223 located at the right edge portion is connected to the positive electrode terminal of the supercapacitor 310 And is connected to the negative electrode terminal of the supercapacitor 310 through the power line L10.

The thermoelectric generator part 220 is composed of two sheets of metal plates or semiconductor plates and generates an electromotive force due to the whitening effect. A device generating a whitening effect refers to a circuit element which joins both ends of a metal or a semiconductor and gives a temperature difference therebetween to generate a thermoelectric power. This whitening effect (or phenomenon) was discovered by T. Seebeck in 1821 for Cu and Bi or Sb. Thermocouple type thermometers which measure the thermoelectric power and convert the temperature into heat are widely used industrially and various thermocouples have been developed from a high temperature to a cryogenic temperature. Thermocouples for temperature measurement include silver-gold (with iron), chromel-gold (with iron), copper-constantan, chromel-constantan, chromel-alumel, platinum-rhodium-platinum, tungsten-tungsten rhenium , There are several. On the other hand, thermoelectric power generators using the semiconductor are relatively high in efficiency because the thermal conductivity (Seebeck coefficient) of the semiconductor is 1000 times larger than that of the metal.

As a result, the whitening effect is simply an effect opposite to the Peltier effect, and electricity is generated when a temperature difference is applied to both sides.

If a temperature difference is generated between the endotherm and the heat-dissipation, the electrons at the high-temperature stage have higher kinetic energy than the electrons at the low-temperature end, and electrons at the high- do. As the electrons move to the low-temperature end, the low-temperature end is charged with "-" and the high-temperature end is charged with "+", and a potential difference is generated between the both ends, and this becomes a Seebak voltage. The generated back voltage acts in the direction of returning the electrons to the high temperature end, and becomes equilibrium when the electrowetting phase is exactly balanced with the thermal driving force causing the electron movement to the low temperature end.

As described above, the white back voltage (V) generated by the temperature difference between the both ends is referred to as a thermoelectromotive force.

In the embodiment of the present invention, solder and flux are put between the heat dissipating plate 210 and the low temperature electrode 222 and between the heat absorbing plate 230 and the high temperature electrode 224, The interface between the heat dissipating plate 210 and the low temperature electrode 222 is soldered and the interface between the heat absorbing plate 230 and the high temperature electrode 224 is soldered. Therefore, the heat dissipation plate 210, the thermoelectric power generation unit 220, and the heat absorbing plate 230 may be integrally bonded.

When the temperature of the heat dissipation plate 230 becomes, for example, 20 degrees Celsius, the temperature of the heat absorbing plate 230 becomes about 36 degrees Celsius, which is the temperature around the human body, An electromotive force due to the whitening effect is generated. An electromotive force of about 0.7 mW is provided to the power storage unit 300 and is continuously charged. On the other hand, the supercapacitor 310 is fully charged at the time of initial shipment, and the electricity generated by the thermoelectric generator can be cumulatively stored in the supercapacitor 310 as described above. If the portable electronic device is placed in a hot place, for example, on a heater, the temperature difference between the heat dissipation plate 210 and the heat dissipation plate 230 becomes larger, and the generated electromotive force becomes larger.

Meanwhile, when the cooling fan of the cooling element 500 is rotated by the motor, the air inside the housing 200 is discharged to the outside through the air discharge units 410 and 420 as seen through arrows A10 and A12 do. Therefore, the cooling efficiency of the heat dissipation plate 210 is maximized or increased. The air discharge portions 410 and 420 may be formed in the shape of a discharge grill.

The electricity generated by the thermoelectric power generation unit 100 is stored in the supercapacitor 310 and is subjected to MPPT control by the power conversion and control circuit 320, Lt; / RTI >

The MPPT control can be designed so that the pilot cell can track the MPP of the main cell in real time using the proportional relationship between the open voltage and the maximum power point (MPP) voltage.

On the other hand, when the power conversion and control circuit 320 is not installed, the harvesting circuit 250 of FIG. 1 can perform the MPPT control.

The harvesting circuit 250 stores the electricity through a supercapacitor or a sub battery, and supplies the stored electricity to the battery of the portable electronic device when the battery charging state of the portable electronic device is lower than a set voltage level Can play a role.

The harvesting circuit 250 may be operated by a dedicated application program related to self-charging of the portable electronic device. The harvesting circuit 250 may be omitted in some cases.

The supercapacitor 310 may be an ELDC (Electric Double Layer Capacitor) type supercapacitor, and it may include a polymer layer divided into upper and lower portions based on separators provided between two current collecting substrates.

Meanwhile, according to a matter, the supercapacitor 310 is formed by mixing a nano wire into a solid electrolyte and inserting it into a graphite oxide layer to form an electrode. Then, the supercapacitor 310 melts the nanowire, And ions are adsorbed on the surface of the graphene. .

Fig. 3 is a view exemplarily showing a rear surface shape of the portable electronic device related to Fig. 1. Fig.

Referring to Fig. 3, an exemplary shape of the main body back cover 100 of the portable electronic device is shown.

The main body back cover 100 includes a battery mounted on the battery mounting portion 104, a USIM card mounted on the USIM card mounting portion 105, and a memory card mounting portion 106. The rear cover 103 includes an opening 103 ' And covers the memory card mounted from the outside. The internal circuit components of the portable electronic device are disposed in the inner space formed by the front case 101 and the rear case 102 constituting the body 50 of the device.

For operation of the camera 121 ', the main body back cover 100 may include an opening 103'. A necessary opening may be formed in the body and the rear cover 103 for smooth functioning of the interface 170, the microphone 122, and the sound output unit 152.

The rear cover 103 covers the surface of the rear case 102 and fixes a battery, a USIM card, a memory card or the like mounted on the surface of the rear case 102 so as not to be detached, To protect the mounting components. The rear cover 103 may be detachably attached to the rear case 102 to prevent water, moisture, and the like from penetrating into the rear case 102.

The self-generating charging device may be installed in the main body back cover 100 as an embodiment of the present invention.

On the other hand, when the matter is different, the self-generated charging device may also be installed in the protective case of the portable electronic device.

Fig. 4 is a view exemplarily showing the shape of the protective case of the portable electronic device related to Fig. 1. Fig.

Referring to FIG. 4, the protective case 100 includes a rear cover 10 covering the rear surface of the portable electronic device, and a front cover 20 covering the front surface of the portable electronic device. The protective case 100 may include a side cover 30 covering one side of the portable terminal and connecting the rear cover 10 and the front cover 20.

First, the rear cover 10 may be provided with a guide portion 12 for covering a part of the edge of the portable electronic device and fixing the portable electronic device to the protective case.

The electromagnetic shielding member S can be selectively installed in the rear cover 10 over a substantially entire area excluding the minimum hole area 14 for signal reception.

Here, the hole region 14 may vary depending on the type of portable electronic device, and may be one or more holes that pass through a range of about 1 to 3 cm in diameter corresponding to the center portion of the back surface of the portable electronic device. The guide portion 12 may be of various shapes.

The guide portion 12 may be divided into a corner guide portion 12a surrounding four corners of the portable electronic device and a side guide portion 12b surrounding four sides of the guide portion 12a. At this time, if necessary, one or more of the interface holes H may be appropriately penetrated or omitted in the corner guide portion 12a or the side guide portion 12b depending on the type of the mobile terminal P. [

In the case of the front cover 20, the electromagnetic wave shielding member S and the auxiliary guide portion 22 can be selectively installed. The front cover 20 may be provided with a band portion B selectively connected to the rear cover 10 when the front cover 20 is fixed to fix the closed state of the front cover 20.

Although the protective case is illustrated as a wallet, the embodiments of the present invention are not limited thereto but may be applied to various types of protective cases.

In the case of the embodiment of the present invention, the self-generated charging device can be installed in the rear cover 10 of the protective case.

5 is a view illustrating an example of a supercapacitor in the power storage unit of FIG.

Referring to FIG. 5, the supercapacitor 310, which can be implemented in the power storage unit 300 of FIG. 1, has a polymer layer divided into upper and lower portions based on a separator L230 installed between two current collecting substrates.

In FIG. 5, the layer L210 indicates the bottom current collecting substrate, and the layer L250 indicates the top current collecting substrate. The layer L230 represents the above separator.

Layer L220 refers to the lower polymer layer for ion storage and layer L240 refers to the upper polymer layer for ion storage. When the charging operation is performed, charges are charged in the lower and upper polymer layers to achieve electric charging.

6 is a diagram illustrating examples of a multi-heating source according to the present invention.

Referring to FIG. 6, examples of a multi-heating source include a contact heat of a user, an external atmospheric radiation heat, a heat source generated from a heater or a heating device, and a heat source generated from an electronic device or equipment.

The multi-heating source 240 shown in FIG. 6 is provided to the heat absorbing plate 230 in FIG. 1 to form a temperature difference for the thermoelectric generator.

Fig. 7 is a view showing an exemplary shape of the heat absorbing plate of Fig. 1;

Referring to Fig. 7, an exemplary shape of the heat absorbing plate 230 having a dimple type surface structure is shown. The heat absorbing plate may be made of an aluminum thin plate or a copper thin plate coated with nickel. In FIG. 7, when the thin plates of the heat absorbing plate 230 are provided with the contact portions 232 in the form of micro-protrusions, the heat absorbing operation is maximized or increased. Here, the material of the thin plate may be made of one or more materials selected from materials having excellent heat conduction such as graphene, silver, copper, gold, aluminum, magnesium, zinc, nickel, iron and tin. The dimple type surface structure can be manufactured by a process such as etching.

Fig. 8 is a view showing an exemplary shape of the heat dissipation plate of Fig. 1;

Referring to FIG. 8, a plurality of heat dissipating fins 212 are formed on a thin plate of the heat dissipating plate 210. The heat dissipation plate 210 may maximize the heat dissipation function by the cooling function of the cooling element 500 in addition to the air cooling structure by the heat dissipation fins 212. The heat dissipation plate 210 may also be formed by etching, metal working, or die casting.

As described above, an optimal embodiment has been disclosed in the drawings and specification. Although specific terms have been employed herein, they are used for purposes of illustration only and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. For example, without departing from the technical idea of the present invention, when the matters are different, the internal structure, the detailed structure and the shape of the thermoelectric generator part and the circuit device may be variously changed and modified.

210: heat radiating plate
220: thermoelectric generating element part
230: endothermic plate
300:

Claims

A portable electronic device including a main body back cover as a rear cover detachable and attachable for replacing a battery of the portable electronic device itself serves as a separate case wrapped to protect it from external physical impact, A protective case of a portable electronic device including a power connector;
A heat dissipation plate mounted on the protective case of the portable electronic device, the heat dissipation plate having a plurality of heat dissipating fins forming a heat sink;
A cooling device disposed between the protection case and the heat dissipation plate and including a motor for cooling the heat dissipation plate through an air discharge unit formed in the protection case and a heat dissipation fan installed on a rotary shaft of the motor;
An endothermic plate having an endothermic structure for assisting absorption of a multi-heating source, the endothermic plate being spaced apart from the heat-dissipating plate and mounted on the protective case;
A thermoelectric generator part for performing a thermoelectric power generation by using a whitening effect due to a temperature difference between the heat absorbing plate and the heat radiation plate; And
And a power storage unit that stores electricity generated by the thermoelectric generator unit and supplies the stored electricity as driving power for the portable electronic device,
Wherein the heat dissipation plate, the thermoelectric device part, and the heat absorbing plate are integrally bonded through a reflow process that uses solder and flux and passes through the inside of the furnace.

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The apparatus as claimed in claim 1, wherein the heat absorbing plate has a dimple-shaped surface structure formed by coating an aluminum thin plate or a copper thin plate with nickel.

The portable electronic apparatus according to claim 1, wherein the heat dissipation plate comprises a thin plate heat sink including at least one of silver, copper, gold, aluminum, magnesium, zinc, nickel, iron, .

The portable electronic device charging device according to claim 1, wherein the protective case comprises a heat sink of a thin aluminum plate or a thin copper plate on a bottom surface of the case to dissipate heat generated from the portable electronic device.

The apparatus of claim 1, wherein the thermoelectric generator includes a semiconductor module including a plurality of p-type and n-type semiconductors.

The apparatus of claim 1, wherein the power storage unit includes an EDLC (Electric Double Layer Capacitor) type super capacitor.

The self-generated charging device of a portable electronic device according to claim 1, wherein the power storage unit has a polymer layer divided into upper and lower portions based on separators provided between two current collecting substrates.

2. The portable electronic apparatus according to claim 1, further comprising a thermoelectric energy harvesting circuit unit for receiving electricity generated by the thermoelectric generator unit and performing MPPT (Maximum Power Point Tracking) control to provide power to the storage unit, .

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