CN203406659U - Wireless charging receiver - Google Patents

Abstract

The utility model discloses a wireless charging receiver, which can be accommodated in the gap between the shell of an electronic product and a rechargeable battery, and used in combination with the rechargeable battery to realize wireless charging. The wireless charging receiver is mainly composed of an induction coil and a printed circuit arranged in layers. Board and electromagnetic shielding layer; the electromagnetic shielding layer is set between the induction coil and the printed circuit board to shield electromagnetic waves. The printed circuit board is equipped with integrated control circuits and current output contacts, and electronic products are provided with couplings and battery electrodes. The current input contact directly contacts and cooperates with the current output contact to transfer electric energy from the wireless charging receiver to the rechargeable battery. Because the wireless charging receiver has a simple structure and good flexibility, it can be accommodated in the gap between the shell of the electronic product and the rechargeable battery and fit well on the surface of the rechargeable battery, thereby achieving the effect of not affecting the appearance of the electronic product and being convenient to use.

Description

A wireless charging receiver

technical field

The utility model relates to a device for wireless charging using the principle of electromagnetic wave induction, in particular to a wireless charging receiver that can be accommodated in the internal gap of electronic products such as mobile phones and tablet computers without affecting the appearance thereof. the

Background technique

A wireless charger that uses the principle of electromagnetic induction for charging, including a transmitter and a receiver. The transmitter is equipped with a primary coil, and the receiver is equipped with a secondary coil. The primary coil of the transmitter is connected to a wired power supply to generate an electromagnetic signal, and the secondary coil of the receiver The coil induces the electromagnetic signal sent by the primary coil to generate current to charge the rechargeable battery. There is no need for a charging cable connection between the transmitter and the receiver, which frees the user from the shackles of the charging cable and solves the problem of charging electronic products of various brands. Incompatible cables or adapters. At present, the application of wireless charging technology in low-power electronic equipment is to install the wireless charging receiver in the rechargeable battery of electronic products, and cooperate with the wireless transmitter to perform wireless charging. Due to the shielding of the battery shell, the charging efficiency is reduced, and at the same time This will also increase the complexity of the design, product volume and manufacturing cost; another approach is to design the wireless charging receiver as a protective case or a rechargeable battery back cover of the electronic product, and connect it to the wired charging interface of the electronic product, so It will occupy the wired charging interface of this electronic product, affecting the appearance and normal use of the mobile phone. Due to problems such as high price, bulky products and low charging efficiency, wireless charging products are far from reaching the level of popularity.

Utility model content

The utility model aims to overcome the deficiencies of the prior art, and provides a wireless charging receiver that can be accommodated in the gap between the shell of the electronic product and the rechargeable battery and fit well on the surface of the rechargeable battery. The wireless charging receiver has The utility model has the advantages of simple structure, convenient use, low manufacturing cost and the like.

In order to achieve the above object, the utility model adopts the following technical solutions:

A wireless charging receiver is used to wirelessly charge an electronic product with a rechargeable battery. The wireless charging receiver can be accommodated in the gap between the shell of the electronic product and the rechargeable battery. The wireless charging receiver is mainly composed of stacked induction Composed of a coil, a printed circuit board and an electromagnetic shielding layer; the electromagnetic shielding layer is arranged between the induction coil and the printed circuit board to shield electromagnetic waves, and the printed circuit board is provided with an integrated control circuit and a current output contact, The electronic product is provided with a current input contact, the electronic product is provided with a current input contact coupled to the electrode of the rechargeable battery, and the current input contact directly contacts and cooperates with the current output contact, so that the electric energy The wireless charging receiver transfers to charge the battery. the

Preferably, the electromagnetic shielding layer is a flexible magnetic isolation sheet made of magnetic powder polymer resin material, which has good flexibility, uniform thickness, and is easy to cut.

Preferably, the outer edge of the electromagnetic shielding layer exceeds the outer edge of the induction coil, and the induction coil is completely covered by the electromagnetic shielding layer, so that electromagnetic waves are coupled from one side of the electromagnetic shielding layer and suppressed when radiating to the other side.

Preferably, the induction coil is a single-layer double-wire enamelled red copper winding coil, and the two ends of the coil are treated with stripping paint and dipping tin.

Further, the printed circuit board is provided with at least two capacitors, which form a double resonant circuit with the induction coil, and the induction coil receives electromagnetic energy, and efficiently converts the magnetic energy into alternating current through the double resonant circuit, and then the The integrated control circuit converts alternating current into direct current for output.

Further, the wireless charging receiver also includes packaging paper, which is used to package the wireless charging receiver to isolate external interference and beautify its appearance.

Further, a filling layer is provided between the packaging paper of the wireless charging receiver. The filling layer is pasted on one side of the induction coil on the printed circuit board and aligned with the outer edge of the printed circuit board. The middle part of the filling layer is punched Holes are used to avoid welding components in the induction coil, electromagnetic shielding layer and integrated control circuit, and the filling layer makes the entire wireless charging receiver flat.

Further, an adhesive layer is provided on the outer surface of the packaging paper on one side of the printed circuit board for fixing the wireless charging receiver on the rechargeable battery.

Preferably, the packaging paper is adhesive-backed pearlescent synthetic paper, and the filling layer is foam. The pearlescent synthetic paper is attached to the wireless charger with adhesive on one side, and patterns or text can be printed on the other side, so that it has the effect of beautifying the appearance and promoting the brand.

To sum up, the beneficial effects of the utility model are: the wireless charging receiver is in the shape of a sheet, has a simple structure and good flexibility, can be accommodated in the gap between the shell of the electronic product and the rechargeable battery, and fit well on the surface of the rechargeable battery , so as to achieve the effect of not affecting the appearance of electronic products and being convenient to use.

Description of drawings

Fig. 1 is an overall structural diagram of an embodiment of the wireless charging receiver of the present invention.

Fig. 2 is a schematic diagram of the structure of an electronic product that can accommodate the wireless charging receiver of the present invention and is provided with a current input contact with the back cover removed;

Fig. 3 is a structural schematic diagram of an induction coil, a printed circuit board and a magnetic isolation sheet in an embodiment of the utility model;

Fig. 4 is a schematic frame diagram of the wireless charging receiver of the present invention;

FIG. 5 is an exploded view of an embodiment of the wireless charging receiver of the present invention.

Detailed ways

Below in conjunction with Fig. 1 to Fig. 5 and a preferred embodiment, the utility model will be further described in detail.

Referring to Fig. 1 and Fig. 2, the wireless charging receiver 10 is in the shape of a thin sheet, and its size is designed to match the size of the rechargeable battery 201 and the gap between the rechargeable battery 201 and the back shell of the electronic product 20, so that it can be accommodated behind the electronic product 20 The gap between the case and the rechargeable battery 201 does not affect the appearance of the electronic product 20 . 3 and 4, the wireless charging receiver 10 includes an induction coil 11, a printed circuit board 12 and an electromagnetic shielding layer 13, and the electromagnetic shielding layer 13 is interposed between the induction coil 11 and the printed circuit board 12. In this embodiment, The middle electromagnetic shielding layer 13 is preferably a flexible magnetic isolation sheet made of magnetic powder polymer resin material, which has good flexibility, uniform thickness, easy cutting, and has the function of isolating electromagnetic waves, and makes the wireless charger fit the rechargeable battery well. 201 surfaces. The printed circuit board 12 is provided with an integrated control circuit 121 and a current output contact 122, and the electronic product is provided with a current input contact 202 coupled to the electrode of the rechargeable battery, and the current input contact 202 is in direct contact with the current output contact 122 , so that the electric energy is transferred from the wireless charging receiver 10 to the rechargeable battery 201 .

Referring to Fig. 3 and Fig. 4, the printed circuit board is provided with at least two capacitors (not shown in the figure), which form a double resonant circuit 123 with the induction coil 11. The induction coil 11 is preferably a single-layer double-wire enamelled copper winding coil, and the coil Both ends are stripped and dipped in tin. During the wireless charging process, the coil of the wireless charging transmitter (not shown) is connected to the power supply to generate an electromagnetic field, and the energy is transmitted to the induction coil 11 through electromagnetic field coupling. The induction coil 11 receives the electromagnetic energy, and passes through The double resonant circuit 123 efficiently converts magnetic energy into alternating current, and then the integrated control circuit 121 converts the alternating current into direct current, and then outputs it from the current output contact 122, and the current output contact 122 is in direct contact with the current input contact 202 , and then charge the rechargeable battery 201 .

As shown in FIG. 5, the wireless charging receiver 10 also includes two packaging papers 14 at the front and rear. In this embodiment, the packaging paper 14 is preferably a pearlescent synthetic paper with adhesive backing, and the adhesive surface of the pearlescent synthetic paper is attached to the wireless charger 10 to isolate it outside interference and beautify its appearance. A filling layer 15 is arranged between the packaging papers 14. The filling layer 15 of this embodiment is preferably foam, and the foam is pasted on one side of the induction coil 11 on the printed circuit board 12, and is aligned with the outer edge of the printed circuit board 12. The middle part is punched to avoid welding components in the induction coil 11 , the electromagnetic shielding layer 13 and the integrated control circuit 121 , and the filling layer 15 makes the whole wireless charging receiver flat. The outer surface of the packaging paper 14 located on one side of the printed circuit board 12 is provided with an adhesive layer, which is used to fix the wireless charging receiver 10 on the rechargeable battery 201 to ensure that the current output contacts 122 and the current input contacts 202 cooperate better connect.

To sum up, the wireless charging receiver of the utility model is in the shape of a sheet, has a simple structure, and has good flexibility. The product has the advantages of convenient appearance and convenient use, simple processing and manufacturing, and low cost, and can be widely used in various electronic products with rechargeable batteries.

The above are only preferred specific embodiments of the present utility model, but the scope of protection of the present utility model is not limited thereto. Any changes or replacements that can be easily imagined within the technical scope disclosed in the present utility model should be Covered within the protection scope of the present utility model.

Claims (10)

1. A wireless charging receiver, which is accommodated in the gap between the shell of the electronic product and the rechargeable battery, and is used to wirelessly charge the electronic product with the rechargeable battery, characterized in that: the wireless charging receiver is mainly composed of stacked Composed of an induction coil, a printed circuit board and an electromagnetic shielding layer; the electromagnetic shielding layer is arranged between the induction coil and the printed circuit board, and the printed circuit board is provided with an integrated control circuit and a current output contact; the electronic The product is provided with a current input contact coupled to the electrode of the rechargeable battery, and the current input contact is in direct contact with the current output contact. 2. The wireless charging receiver according to claim 1, wherein the electromagnetic shielding layer is a flexible magnetic isolation sheet made of magnetic powder and polymer resin material. 3. The wireless charging receiver according to claim 1 or 2, wherein the outer edge of the electromagnetic shielding layer exceeds the outer edge of the induction coil, and the induction coil is completely covered by the electromagnetic shielding layer. 4. The wireless charging receiver according to claim 1, wherein the induction coil is a single-layer double-wire enamelled red copper winding coil. 5 . The wireless charging receiver according to claim 1 , wherein the printed circuit board is provided with at least two capacitors, which form a double resonant circuit with the induction coil. 6. The wireless charging receiver according to claim 1, characterized in that: the wireless charging receiver further comprises packaging paper for packaging the wireless charging receiver. 7. The wireless charging receiver according to claim 6, characterized in that: a filling layer is provided between the packaging papers, and the middle part of the filling layer is punched to avoid the induction coil, the electromagnetic shielding layer and the integrated circuit. Soldering components in the control circuit. 8. The wireless charging receiver according to claim 6, characterized in that: the outer surface of the packaging paper on one side of the printed circuit board is provided with an adhesive layer for fixing the wireless charging receiver on the rechargeable battery . 9. The wireless charging receiver according to claim 6, wherein the packaging paper is adhesive-backed pearlescent synthetic paper. 10. The wireless charging receiver according to claim 7, wherein the filling layer is foam.

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