JP2015142421A - Non-contact power supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a non-conventional, flexible and portable non-contact power supply device capable of charging a battery of an electronic apparatus with no contact (wirelessly) without using a commercial power source.SOLUTION: A non-contact power supply device A includes at least: a flexible CIGS solar cell module 1; a flexible power transmission printed circuit board 2; and an adhesive layer 6 attachable to a surface of a carried article in a freely removable manner. The non-contact power supply device A is made into a flexible and portable type that transmits power to a power reception printed circuit board built in an electronic apparatus while being mounted on the surface of the carried article and charges a battery with the transmitted power.

Description

  The present invention relates to the provision of a portable non-contact power feeding apparatus that can charge a battery of an electronic device in a non-contact (wireless) manner while being carried around easily.

  In recent years, the market of non-contact power feeding (wireless power transmission) in which electric power is directly transmitted to an electronic device equipped with a secondary battery for charging without using a power feeding cable is rapidly expanding. The forecast for 2010 will triple in the next eight years, and in 2020, almost all portable electronic devices will have a secondary battery (battery) that can receive non-contact power supply. ing.

  For such electronic devices, various systems for performing non-contact power feeding have already been studied. For example, as shown in Patent Document 1, a device for performing non-contact power feeding using a solar cell as a power source is proposed. Has been made.

  However, although this device does not require a commercial power supply and can be used outdoors, it charges the electronic device while it is fixed in place, so it can be easily carried around and charged. I can't.

JP 2011-211182 A

  The present invention has been made in view of such circumstances, and is an unprecedented flexible portable non-contact power feeding device that can charge a battery of an electronic device by non-contact (wireless) while being carried around easily. The purpose is to provide.

  In order to achieve the above object, the present invention provides a non-contact power supply apparatus that charges a battery in a non-contact manner with respect to an electronic device, and includes at least a flexible CIGS solar cell module, a flexible printed circuit board for power transmission, and a portable device. Mounting means that can be detachably attached to the surface of the product, and in a state of being attached to the surface of the portable product, power is transmitted to the printed circuit board for power reception built in the electronic device, and the power of the battery is The gist of the wireless power supply device is a flexible portable type that performs charging.

  That is, the present inventors have repeatedly studied whether or not charging of a battery of an electronic device that can be performed only at a fixed place can be performed while the electronic device is carried. As a result, not only can the battery of the electronic device be charged in a non-contact (wireless) state, but also the electric power used for charging is obtained from the CIGS solar cell, and the configuration thereof is flexible CIGS solar. A battery module, a flexible printed circuit board for power transmission, and a mounting means that can be detachably attached to the surface of the portable product, and is mounted on the surface of the portable product, and the printed circuit board for power reception built in the electronic device As a result, the inventors have found that anyone can easily charge the battery while carrying the electronic device by transmitting the power to the battery and charging the battery with the power. .

  As described above, the present invention is a non-contact power feeding apparatus that charges a battery in a non-contact manner with respect to an electronic device, and includes at least a flexible CIGS solar cell module (hereinafter referred to as a “CIGS solar cell module”) and a flexible power transmission. Printed circuit board (hereinafter referred to as “printed circuit board for power transmission”) and attachment means that can be detachably attached to the surface of the portable product. In addition, the power is transmitted to the printed circuit board for power reception, and the battery is charged with the power. For this reason, high photoelectric conversion efficiency is achieved by the CIGS solar cell module, and electric power required for charging can be obtained with a smaller device. In addition, since it includes a printed circuit board for power transmission, a CIGS solar cell module, and attachment means that can be detachably attached to the surface of the portable product, and the device itself is configured flexibly, it can be easily adapted to the surface of the portable product. It can be attached in the state that it is attached and can be carried in that state. Furthermore, since the CIGS solar cell is provided, the electronic device can be charged anytime in a desired place without being restricted to a place where a commercial power source is provided. In addition, since it is configured as a non-contact (wireless) type, it is convenient because it does not take time to connect to an electronic device every time it is charged. In the present invention, the “portable item” means not only an item to be worn and carried but also clothes and the like worn by the user.

  In addition, the CIGS solar cell module is covered with a sealing material, and the sealing material is a cured body of a resin composition mainly containing at least one selected from the group consisting of ethylene vinyl acetate and polyvinyl butyral. , Resistance to external impacts, water wetting, etc. is enhanced, and a long life can be realized. In particular, it is possible to increase the durability of the CIGS solar cell module against moisture degradation and the fall of the device, and the life of the entire device can be further extended. In the present invention, the term “main component” means a component that occupies the majority of the whole, and includes the case where it consists of only the main component.

  And as a means of attachment, the contactless power supply device with the adhesive layer formed on the surface in contact with the surface of the portable product is placed in close contact with the surface shape of the portable product, that is, clothing, etc. It can be attached in a state of being caused to be inadvertently prevented from being accidentally dropped. In addition, the device can be more easily attached to and detached from the surface of the portable product.

  In addition, for devices equipped with power transmission status notification means for notifying the user of the power transmission status for the electronic device, the user confirms whether power transmission to the electronic device is normally performed during use. Therefore, failure of charging, overcharging, etc. can be effectively prevented.

It is a perspective view which shows typically the non-contact electric power feeder obtained by one embodiment of this invention. It is a fragmentary sectional view which shows typically the use condition of the said non-contact electric power feeder. It is typical sectional drawing of the CIGS solar cell used for the said non-contact electric power feeder. It is explanatory drawing which shows other embodiment of this invention typically.

  Next, an embodiment for carrying out the present invention will be described.

  FIG. 1 is a perspective view schematically showing a non-contact power feeding apparatus A (hereinafter referred to as “apparatus A”) obtained by an embodiment of the present invention, and a partial sectional view of FIG. It is a fragmentary sectional view for explaining a method typically. This device A has a thickness of 1.5 mm × length 150 mm × width 150 mm. For example, the device A is attached to the surface of the back pocket of a trouser and charges the battery of the mobile phone placed in the pocket. (See FIG. 2). And the CIGS solar cell module 1 which converts light into electric power, the printed circuit board 2 for power transmission for transmitting the electric power obtained by the CIGS solar cell module 1 to the printed circuit board 9 for power reception of the mobile phone 8, and the portable An LED lamp 3 that is lit when power is transmitted to the telephone 8, a sealing material 4 that seals the CIGS solar cell module 1 and the printed circuit board 2 for power transmission, and an outer periphery of the sealing material 4 The sealing film 5 which covers a surface, and the adhesive layer 6 for attaching the apparatus A to the fabric 7 (for example, the pocket surface of trousers) are provided.

  That is, the device A has the pressure-sensitive adhesive layer 6 formed on the entire surface on the side in contact with the fabric 7, and the device A itself is configured to be flexible. By simply touching, it can be easily attached in close contact with the fabric 7. Therefore, when the mobile phone 8 is placed in the pocket where the device A is attached to the surface, the power generated in the CIGS solar cell module 1 of the device A is used to receive power from the printed circuit board 2 for power transmission to the mobile phone 8. The data is transmitted to the printed circuit board 9 and the battery 10 is charged (see FIG. 2). In addition, the device A is provided with LED lamps 3 at the corners on the opposite side (CIGS solar cell module side) opposite to the side in contact with the fabric 7, and confirms the power transmission state while checking the power transmission state. The battery 10 can be charged. For this reason, the failure of charge can be prevented effectively. The configuration of the device A will be described in detail below. In addition, in FIG. 1, each part is shown typically and is different from an actual thickness, size, etc. (the same applies to the following figures).

  According to this configuration, since the device A includes the CIGS solar cell module 1, a commercial power source is unnecessary and the battery 10 of the mobile phone 8 can be charged at an arbitrary place. And since CIGS solar cell module 1 has high photoelectric conversion compared with a general solar cell, size reduction of apparatus A itself is realizable, ensuring sufficient electric power. Moreover, since the apparatus A is configured flexibly and the pressure-sensitive adhesive layer 6 is provided on the entire surface in contact with the fabric 7, even if the fabric 7 has irregularities, it can be attached in close contact with the fabric 7. In addition, it is easy to attach and detach, and can be easily changed according to a portable item (clothing, etc.). Therefore, the battery 10 can be charged even while walking only by putting the mobile phone 8 in the pocket of the pants to which the device A is attached.

As shown in FIG. 3, the CIGS solar cell module 1 includes a base material 11, a back electrode layer 12, a CIGS photoelectric conversion layer 13, a buffer layer 14, a transparent electrode layer 15, an extraction electrode 16, and a connection. Wiring 17 is provided, and the entire module is configured flexibly. Since the size (surface area) of the CIGS solar cell module 1 is related to the electrical output as well as the photoelectric conversion efficiency, it is determined so as to secure the amount of power for operating the printed circuit board 2 for power transmission. Specifically, since the energy of the AM1.5 spectrum is 0.018 W / cm ² , the obtained electrical output is determined by multiplying this by the photoelectric conversion efficiency of the CIGS solar cell module 1. In the said embodiment, the several CIGS solar cell (not shown) is electrically connected, the CIGS solar cell module 1 whose total area of a cell is 208 cm < ² > is used, The photoelectric conversion efficiency is 18 %, An electrical output of about 3 W can be obtained under AM1.5 irradiation. The base material 11, the back electrode layer 12, the CIGS photoelectric conversion layer 13, the buffer layer 14, the transparent electrode layer 15, the extraction electrode 16, and the connection wiring 17 will be described in detail later.

  The printed circuit board 2 for power transmission has a coil-shaped transmission circuit, a position detection coil, a switch, and the like for transmitting power to the mobile phone 8 on a holding base material such as plastic, and is formed into a sheet shape. It is what has become. Such a printed circuit board 2 for power transmission is preferably lightweight so as to make the device A portable, and is required to be flexible so that it can be attached along the fabric 7. And it is electrically connected with the CIGS solar cell module 1 through the connector (circuit). Further, the power transmission printed circuit board 2 is provided with a detection circuit that detects a transmission state of power to the power reception printed circuit board 9.

  The LED lamp 3 is disposed at one end of the CIGS solar cell module 1. Then, it is controlled by a detection circuit provided in the power transmission printed circuit board 2 and lights up when power is normally transmitted from the power transmission printed circuit board 2 to the power reception printed circuit board 9. Yes.

  The sealing material 4 seals the CIGS solar cell module 1 and the printed circuit board 2 for power transmission, and may be any material that can support them, for example, ethylene vinyl acetate polymer, olefin polymer, vinyl. A cured product of a resin composition mainly containing a polymer such as a butyral polymer can be used. However, from the viewpoint of excellent water resistance and easy molding by hot press treatment, it is preferable to use a cured body of an ethylene vinyl acetate resin composition. Moreover, in order to improve light resistance, a trace amount UV absorber may be added to these resin compositions. In the present embodiment, as a resin composition, Evaflex (trademark) manufactured by DuPont is used, and a cured body that is hot press-molded so as to have a finished thickness of 100 to 200 μm is used.

The sealing film 5 covers the outer peripheral surface of the sealing material 4 and enhances the water resistance of the device A. Examples of such a film include olefins such as polyethylene terephthalate and polyethylene naphthalate, and polyvinyl butyral polymers. In order to improve water resistance, SiO ₂ , SIN, TiO ₂ , ZrO _{2 are used.} An inorganic substance such as may be coated on the film surface. The water resistance of the sealing film 5 is preferably 10 ⁻⁴ g / m ² · DAY to 10 ⁻² g / m ² · DAY or less. In the present embodiment, X-BARRIER manufactured by Mitsubishi Plastics is used.

  The pressure-sensitive adhesive layer 6 is preferably a double-sided tape that has a good balance between an adhesive force that does not cause displacement and dropping and a removability that can be easily attached and detached. Etc. can be used. As such a double-sided tape, for example, No. manufactured by Nitto Denko Corporation. 5000 N (C), No. 530R.

  And the said CIGS solar cell module 1 has the base material 11, the back surface electrode layer 12, the CIGS photoelectric conversion layer 13, the buffer layer 14, the transparent electrode layer 15, the extraction electrode 16, and the connection wiring 17 as above-mentioned. (See FIG. 3). These are described in detail below.

  As the base material 11, a metal base material such as SUS or Ti formed into a foil shape or a resin base material such as polyimide can be used. However, the base material 11 has flexibility and heat treatment when forming the CIGS photoelectric conversion layer 13. Any material that can withstand temperature and structurally support the CIGS photoelectric conversion layer 13, the buffer layer 14, the transparent electrode layer 15, the extraction electrode 16, and the connection wiring 17 may be used. Among them, SUS is preferably used because it satisfies these requirements and is inexpensive. These surfaces may be covered with a metal film, a transparent conductive film, an insulating film, or the like. In the above embodiment, SUS having a width of 10 mm, a length of 300 mm, and a thickness of 50 μm is used.

The back electrode layer 12 is made of a conductive material, and a single layer or a plurality of laminated layers of metals such as Ti, Ni, Cr, Ag, Al, Cu, Au, and Mo, and transparent conductive films such as ITO, ZnO, and SnO _2. Can be used. Since the back electrode layer 12 plays a role as an electrode, it is preferable that the back electrode layer 12 has high electrical conductivity, and it is also possible to use a layer whose electrical conductivity is improved by adding a small amount of impurities. Among these, Mo is preferably used because it has excellent adhesion to the CIGS photoelectric conversion layer 13. Examples of the method for forming the back electrode layer 12 include a sputtering method, a CVD method, a vapor deposition method, a sol-gel method, a spray method, an electrodeposition method, and a chemical deposition method. Moreover, it is preferable that the surface of the back electrode layer 12 has an uneven shape. This is because the formation of irregularities on the surface of the back electrode layer 12 is effective in improving the characteristics of the CIGS photoelectric conversion layer 13 due to the light scattering effect and preventing the CIGS photoelectric conversion layer 13 from peeling. In the case where the substrate 11 has sufficient conductivity, the back electrode layer 12 may not be provided. In the said embodiment, what laminated | stacked Cr and Mo in this order was used, and each film thickness is 400 nm.

  The CIGS photoelectric conversion layer 13 is a CIGS semiconductor made of Cu, In, Ga, and Se, and has a chalcopyrite structure. The proportion of each constituent element is 10 atomic% to 30 atomic% for Cu, 1 atomic% to 20 atomic% for In and Ga, and 20 atomic% to 60 atomic% for Se. Moreover, in order to promote the crystal growth of a CIGS semiconductor, a trace amount impurity may be added, for example, Na may be contained about 1 atomic%. Examples of a method for forming the CIGS photoelectric conversion layer 13 include a sputtering method, a CVD method, a vapor deposition method, a sol-gel method, a spray method, an electrodeposition method, and a chemical deposition method. Moreover, it can also form combining these methods and heat processing. When the CIGS photoelectric conversion layer 13 exhibits p-type conductivity, a pn semiconductor junction can be formed with a buffer layer 14 which is an n-type semiconductor described later, and a photoelectric conversion function can be exhibited. In the above-mentioned embodiment, Cu is 24 atom%, In is 22 atom%, Ga is 5 atom%, and Se is 49 atom%.

  The buffer layer 14 is made of an n-type semiconductor, and a single layer of CdS, ZnO, ZnS, ZnMgO, or the like or a laminate of these is preferably used. Examples of the method for forming the buffer layer 14 include a sputtering method, a CVD method, a vapor deposition method, a sol-gel method, a spray method, an electrodeposition method, and a chemical precipitation method. In addition, before forming the buffer layer 14, an element that plays the role of an n-type determining element in CIGS, such as Cd or Zn, may be doped. In the above-described embodiment, a layer in which a ZnMgO layer having a thickness of 80 nm is stacked on a layer formed by heat-treating (Zn doping) Zn having a thickness of 5 nm is used.

  The transparent electrode layer 15 is made of a material having a transparent conductivity, and for example, a single layer of a transparent conductive film such as ITO, tin oxide, and zinc oxide or a multilayer of these can be used. Since the transparent electrode layer 15 plays a role as an electrode, it is preferable that the electrical conductivity is high, and a layer whose electrical conductivity is improved by adding a small amount of impurities can also be used. Examples of the method for forming the transparent electrode layer 15 include a sputtering method, a CVD method, a vapor deposition method, a sol-gel method, a spray method, an electrodeposition method, and a chemical precipitation method. In the embodiment described above, ITO deposited with a thickness of 80 nm is used.

  The extraction electrode 16 can use the same material and formation method as the back electrode layer 12. However, if the entire surface of the CIGS photoelectric conversion layer 13 is covered, light does not enter the CIGS photoelectric conversion layer 13 and the photoelectric conversion function does not appear. Therefore, the shape of the extraction electrode 16 is a CIGS photoelectric conversion layer 13 such as a comb shape. It is necessary to have a grid shape that does not cover the entire surface. Since the thickness and size (area) of the extraction electrode 16 are affected by resistance loss depending on the magnitude of the current generated by the CIGS photoelectric conversion layer 13, it is preferable to select an appropriate one as appropriate. In the embodiment described above, Cu having a thickness of 1 μm and a width of 1 mm is used in any of the extraction electrodes 16 in contact with the back electrode layer 12 and the transparent electrode layer 15.

  The connection wiring 17 is made of a conductive wiring member, and for example, a general conductive wire can be used. Among them, those coated with a corrosion-resistant material such as rubber, plastic, and stainless steel for durability are preferable because of their long-term reliability and excellent water resistance. The coated one is particularly preferable because it is excellent in light resistance. In the above embodiment, a solder plating wire A-TPS manufactured by Hitachi Metals, Ltd. is used.

  Next, apparatus B which is another embodiment of the present invention will be described. As shown in FIG. 4, the device B includes a part b1 having the CIGS solar cell module 1 and a part b2 having the printed circuit board 2 for power transmission. Connected. In the device B, both the parts b1 and b2 are sealed with the sealing material 4 and the surface thereof is covered with the sealing film 5. However, these descriptions are omitted in FIG. The basic configuration of the device B is the same as that of the device A (FIG. 1), and the description of the same reference numerals is omitted.

  That is, the device B is used by attaching to a glove, and with the connection wiring 18 passed through the crotch of the finger, the part b1 is attached to the back of the hand with the adhesive layer 6 and the part b2 is attached to the palm side. By attaching with the layer 6, the battery 10 can be charged even when the mobile phone 8 is held by the hand wearing this glove (for example, the left hand) and the mobile phone 8 is operated by the opposite hand (for example, the right hand). Can be done.

  In any of the above-described embodiments (hereinafter, simply referred to as “the above-described embodiment”), the adhesive layer 6 is used as an attachment means, but other attachment means in place of the adhesive layer 6 are used. Examples include a hook-and-loop fastener and a gecko tape.

  In the above embodiment, the LED lamp 3 is used to notify the state in which power is transmitted from the power transmitting printed circuit board 2 to the power receiving printed circuit board 9 by light. An electronic circuit or the like may be used. However, if these are used, they are somewhat heavy, and therefore may not be used when further weight reduction is required.

  In the embodiment described above, no drop prevention means is provided. However, for example, a ball chain may be attached to the corner of the apparatus, and drop prevention means may be provided such as connecting the chain to a portable item. . Moreover, you may make it connect with a portable article using a clip, a safety pin, etc. FIG.

  Furthermore, in the above embodiment, the device is used by attaching it to the surface of a trouser pocket or a glove, but in addition to this, as long as it can be carried with an electronic device such as a PC case, a digital camera case, a bag, etc. It can also be used by attaching it to.

  In the above embodiment, a mobile phone is used as a portable item to be powered by the apparatus. However, other portable terminals such as a portable music player, a portable PC, and a tablet terminal can be used for wireless charging. , You can power anything.

  Next, examples will be described together with comparative examples. However, the present invention is not limited to this.

[Example 1]
In the same manner as in the above embodiment (apparatus A), a non-contact power feeding apparatus (length 15 cm, width 15 cm, thickness 1.5 mm) was manufactured (total weight 50 g). That is, this is a CIGS solar cell module 1 having a thickness (55 um) having a light receiving surface with a transformation efficiency of 18% and 208 cm ² , and a power transmission printed circuit board 2 having a transmission power of 3 W and a transmission efficiency of 80%. , An adhesive layer 6 made of a removable double-sided tape (Nitto Denko Corporation, No. 5000N), and an LED lamp 3. The LED lamp 3 normally transmits power to the mobile phone 8. It is lit while it is being performed.

[Comparative Example 1]
A non-contact power feeding apparatus was manufactured in the same manner as in Example 1 except that the CIGS solar cell module of Example 1 was replaced with one supported by 500 μm thick soda lime glass (total weight 100 g).

  About the said Example 1 and the comparative example 1, the following evaluation was performed and the result was combined with Table 1 of the postscript, and was shown.

[Flexibility]
The bending resistance of each of 10 samples was evaluated using a cylindrical mandrel method (JIS K5600-5-1) using two types of mandrels having a diameter of 32 mm and a diameter of 20 mm. The evaluation criteria are as follows.
○: No abnormalities in all 10 pieces.
X: 3 or more abnormalities.

[Plane stickability]
This flat plate was supported horizontally downward in a state where 10 samples were stuck to a flat plate having a surface of 100% cotton on the surface so as not to overlap each other. Then, a vibration of 30 times / minute was repeatedly applied for 1 hour at a stroke of 10 cm in the horizontal direction, and it was observed whether it peeled off and dropped off. The evaluation criteria are as follows.
○: No abnormalities in all 10 pieces.
X: 3 or more pieces fall off or partially peel off.

[Curved surface pasting]
A cylindrical body having a diameter of 20 cm was prepared, and artificial leather (manufactured by Asahi Kasei Co., Ltd., product name Ramose) was pasted around it. And this cylindrical body was supported horizontally in the state which affixed each sample 10 on this artificial leather surface so that it might not mutually overlap. Then, a vibration of 30 times / minute was repeatedly applied for 1 hour at a stroke of 10 cm in the horizontal direction, and it was observed whether it peeled off and dropped off. The evaluation criteria are as follows.
○: No abnormalities in all 10 pieces.
×: Cannot be pasted.

[Portable charging]
The contactless power supply device of Example 1 and Comparative Example 1 was attached to the surface of the back pocket of the trousers, and the mobile phone was taken out with the mobile phone inside the pocket, and charged for 1 hour while walking. . The evaluation criteria are as follows.
○… Can be charged until the rechargeable battery of the mobile phone is almost full.
×: Dropped off and cannot be fully charged.

  As shown in Table 1, in Example 1, the flat surface sticking property as well as the bending resistance and curved surface sticking property are excellent, and it can be attached to anything without selecting a portable product. Was confirmed to work without problems. On the other hand, the comparative example 1 is inferior in bending resistance and curved surface sticking property, and also has a heavy weight. Could not be charged.

  The non-contact power feeding device of the present invention is suitable for charging a battery of an electronic device by non-contact (wireless) while being carried easily.

DESCRIPTION OF SYMBOLS 1 CIGS solar cell module 2 Printed circuit board 6 for power transmission Adhesive layer A Non-contact electric power feeder

Claims (4)

  A non-contact power supply device that charges a battery in a non-contact manner with respect to an electronic device, and at least a flexible CIGS solar cell module, a flexible power transmission printed circuit board, and an attachment means that can be detachably attached to the surface of a portable product In a state of being mounted on the surface of a portable product, the power is transmitted to a power receiving printed circuit board built in the electronic device, and the battery is charged with the power. The non-contact electric power feeder characterized by this.   The flexible CIGS solar cell module is covered with a sealing material, and the sealing material is a cured body of a resin composition mainly comprising at least one selected from the group consisting of ethylene vinyl acetate and polyvinyl butyral. The non-contact power feeding device according to 1.   The contactless power supply device according to claim 1 or 2, wherein an adhesive layer made of an adhesive is formed on the surface of the contactless power supply device that is in contact with the surface of the portable product as the attachment means.   The non-contact electric power feeder as described in any one of Claims 1-3 provided with the electric power transmission state notification means for notifying a user of the transmission state of the electric power with respect to an electronic device.

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