KR20080081480A - Wireless charger having multiple coil pad and battery charging set having the same - Google Patents

Abstract

A non-contact charger having a plurality of coil pads and a battery charging set having the same are provided to improve charge efficiency by using the coil pads to mount non-contact batteries with different sizes and capacity selectively. A non-contact charger includes a plurality of coil pads(20) and a charger body(10). The plurality of coil pads receive and fix primary coils and form different magnetic fields from each other. The charger body includes a pad receiving unit(12) for receiving the plurality of coil pads and receives a high frequency AC current from the primary coils when the coil pads are mounted to the pad receiving unit by including a charge circuit inside. The coil pads are formed by a PCB(Printed Circuit Board) and the primary coils are patterns formed on the PCB.

Description

Contactless charger having a plurality of coil pads and a battery charging set having the same {Wireless charger having multiple coil pad and Battery charging set having the same}

The following drawings attached to this specification are illustrative of preferred embodiments of the present invention, and together with the detailed description of the invention to serve to further understand the technical spirit of the present invention, the present invention is a matter described in such drawings It should not be construed as limited to

1 is a perspective view showing a battery charge set according to an embodiment of the present invention.

<Description of main reference numerals in the drawings>

10.Charger body 11 ... Charging cradle

12 ... Pad compartment 13 ... Circuit compartment

20 Coil pad 21 Base plate

22, 23, 24 ... Primary coil 25 ... Contact terminal

30 Electronic devices 31 Battery cells

The present invention relates to a contactless charger, and more particularly, to a contactless charger implemented to charge a contactless battery mounted on various types of electronic devices.

In general, portable electronic devices such as mobile phones, notebook computers, PDAs, and the like are provided with a storage battery therein and are configured to be used while the user moves. However, such a portable electronic device includes a separate charger for charging a storage battery, and the charger is connected to a general commercial power supply to provide charging current to the storage battery of the portable electronic device. On the other hand, in order for the charger to provide the charging current to the battery of the portable electronic device, the charging matrix constituting the charger and the battery of the portable electronic device must be electrically connected. In order to electrically connect the charging mother and the storage battery of the portable electronic device, in the wired (contact type) charger, separate connection terminals were respectively configured for the charging mother and the portable electronic device or the storage battery. Therefore, in order to charge the storage battery of a portable electronic device, the connection terminal of a portable electronic device or a battery and the connection terminal of a charging mother should be mutually connected.

However, in the case of a contact type charger constituting a connection terminal between a portable electronic device or a storage battery and a charging mother, the connection terminal protrudes to the outside, and the connection terminal is unsightly unsightly. In some cases, a short circuit may occur due to user's carelessness and the battery may be completely discharged.

In order to solve this problem, a method has been developed in which a battery of a portable electronic device is electrically coupled with a charging matrix wirelessly (contactless) to charge energy of the charging matrix.

In the non-contact charging method, a primary circuit operating at a high frequency is configured in a charging matrix, and a secondary circuit is configured in a battery side, i.e., in a portable electronic device or a battery, thereby inducing a current of the charging matrix, that is, energy by a portable electronic device. It is a way to provide a storage battery. Contactless charging with inductive coupling is already used in some applications (eg electric toothbrushes, electric shavers, etc.).

However, when applying to portable electronic devices such as mobile phones, portable MP3 players, CD players, MD players, cassette tape players, notebook computers, PDAs, etc., the size of the charging target is different and the power required for charging (charge capacity) ) Are also different.

Accordingly, in charging a contactless battery mounted on various electronic devices by using a contactless charger, in order to increase the charging efficiency, each contactless charger implemented appropriately in consideration of the size and capacity of the charging target is used. It is preferable.

However, in order to charge the contactless batteries mounted on the various electronic devices as described above, when the charger suitable for charging each contactless battery is used, the user must have several types of contactless chargers. In addition, in order to charge each contactless battery as needed, it is inconvenient to find and charge the contactless charger corresponding to. In addition, in manufacturing an electronic device equipped with a contactless battery, an electronic device manufacturer has to produce a contactless charger for each product, thereby causing a problem in that manufacturing cost increases.

Therefore, in order to use the contactless charger widely in an electronic device having a plurality of contactless batteries, it is urgently required to increase the charging efficiency in consideration of the size and charging capacity of the electronic device having each contactless battery.

The present invention has been made in consideration of the above-described points, and an object thereof is to provide a contactless charger capable of charging a plurality of contactless batteries in consideration of different sizes and capacities.

In order to achieve the above object, a contactless charger according to an aspect of the present invention is a primary side for generating a magnetic field to be charged through the inductive coupling with the secondary side coil to the charging target having a secondary side coil A contactless charger having a coil, comprising: a plurality of coil pads accommodating and fixing the primary coil and forming different magnetic fields; And a pad accommodating part for accommodating the plurality of coil pads, wherein a charging circuit is provided therein, and a charging body for supplying a high frequency alternating current to the primary coil when the coil pad is mounted to the pad accommodating part. Include.

The coil pad may be formed of a PCB board, and the primary coil may be a pattern formed on the PCB board.

Preferably, the plurality of coil pads generate magnetic flux in the same direction, and it is preferable that the wound shape of the primary coil has a substantially planar circular shape or a planar polygonal shape.

Each of the primary coils provided in the plurality of coil pads may be formed in a pattern having a different shape, and each of the primary coils provided in the plurality of coil pads may have different inductance values.

In addition, the charging body may be provided to accommodate a plurality of coil pads at the same time.

According to another aspect of the present invention, a battery charging set includes a plurality of coil pads configured to receive and fix the primary coil and to form different magnetic fields, and a pad accommodating portion for accommodating the plurality of coil pads. A contactless charger having a charging circuit provided in the coil pad, the primary side coil including a charging body for supplying high frequency AC power when the coil pad is mounted to a pad housing; And a secondary battery for inducing high frequency AC power through electromagnetic coupling with a magnetic field formed by the contactless charger, and a high frequency input from the secondary coil. And a plurality of contactless battery packs having a charging power supply unit configured to convert AC power into power required for charging the battery cell.

Each of the primary side coils of the plurality of coil pads may be formed in a pattern having a different shape, and the secondary side coils of the battery pack may correspond to a shape of the primary side coils having a pattern of different shapes. It is made of a shape.

Each of the primary coils provided in the plurality of coil pads has different inductance values, and the plurality of battery packs generate power of a magnitude corresponding to the inductance value and supply the same to the battery cells.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

1 is a perspective view illustrating a battery charging set according to a preferred embodiment of the present invention, and FIG. 2 is a diagram illustrating coil pads corresponding to respective electronic devices having battery cells according to a preferred embodiment of the present invention.

1 or 2, a battery charging set according to an embodiment of the present invention is a contactless charger having a charger body 10 and a coil pad 20 selectively inserted into the charger body 10. It includes an electronic device having a battery cell 31 that is charged in contact with.

In the contactless charger, the charger body 10 is a charging cell 11 for placing the battery cell 31 or the electronic device 30 having the charging target, the coil for receiving and fixing the coil pad 20 A pad housing 12 and a circuit 13 for supplying high frequency AC power to the coil pad 20 mounted to the pad housing 12 are provided.

The charge holder 11 is formed so that the battery cell 31 or the electronic device 30 having the same is placed in a stable state. For example, the charging cradle 11 may have a flat surface or a central portion thereof formed relatively lower than the outer portion so as to be continuously connected from the outer portion to the central portion.

The coil pad accommodating part 12 is a means for accommodating and fixing the coil pad 20. The coil pad accommodating part 12 has a shape, a thickness, and a plane size corresponding to the coil pad 20. In addition, the coil pad accommodating part 12 is provided at a position close to the charging cradle 11, that is, at a position in which a magnetic field formed as the coil pad 20 is mounted is formed on the charging cradle 11. .

The circuit unit 13 generates and supplies desired high frequency AC power from a commercial AC power supply. The circuit unit 13 includes a rectifier, a switching mode power supply (SMPS), a communication circuit for communicating with a secondary battery, and a control circuit for controlling them. Can be done.

The coil pad 20 receives power from the base plate 21 to form a magnetic field in the charging cradle 11, and primary coils 22, 23, and 24 formed in various shapes on the bass plate 21. And a contact terminal 25 connecting the primary coils 22, 23, 24 and the circuit part 13 as the coil pad 20 is inserted into and fixed to the coil pad receiving part 12.

The primary coils 22, 23, and 24 formed on the plurality of coil pads 20 have different patterns, shapes, and sizes, respectively, and have different inductance values. Accordingly, even though each of the coil pads 20 receives the same power required for charging from the circuit unit 13, each of the coil pads 20 generates magnetic fields having different magnitudes at different positions.

The primary coils (22, 23, 24) are all made of a flat spiral, the shape of the coil may have a polygonal shape, such as a square, a hexagon, depending on the shape of the base plate 21 or the shape of the secondary coil, It may also be made of a combination of a plurality of coils.

The primary coils 22, 23 and 24 generally use copper wires whose surfaces are covered with an insulating material. However, the primary coils 22, 23 and 24 are not particularly limited as long as they are materials having excellent conductivity such as gold, silver and aluminum. Furthermore, although the primary coils 22, 23, and 24 may each be wound with a single wire, the use of a Litz wire in which a plurality of thin wires are collected is used for charging using a high frequency current. desirable.

In addition, each of the primary coils 22, 23, and 24 may be formed of a conductor pattern, not a wound form of a conductor. That is, the base plate 21 may be made of a flexible insulating film (substrate film) such as a printed circuit board (PCB) or polyimide, and the primary coils 22, 23, and 24 may be formed on the base plate 21. It may be a conductor pattern obtained by laminating a metal thin film having excellent conductivity such as copper and aluminum. Furthermore, although the present invention relates to the primary side coils 22, 23 and 24, the coils of the secondary side, i.e., portable electronic devices, like the primary side coils 22, 23 and 24 of the present invention are also wound in the form of a copper wire or the like. Or in a conductor pattern. Accordingly, the term "coil" in the present specification is a broad meaning, and includes everything having a coil-shaped pattern, whether the wire is wound or formed by etching a metal thin film.

However, a feature of the present invention is that the contactless charger includes a charger body 10 and a coil pad 20 that can be selectively inserted into the charger body 10, wherein the charging cradle 11 The configuration, arrangement, and shape of the charging housing 12, the circuit 13, and the like can be changed as many as possible.

For example, the overall shape of the charger body 10 including the charging cradle 11, the charging housing 12, and the circuit 13 may be formed in a polygonal shape, such as a quadrangle and a hexagon, rather than a disc, and the circuit part 13 may be formed. Is not necessarily a protruding structure, and furthermore, in the embodiment of the present invention, the contactless charger 10 is illustrated as being flatly laid on the ground, but is made of, for example, a wall-mounted charge holder 11 having a contactless battery ( 31 may be formed in the form of a pocket or a drawer for storing the electronic device 30 having.

In addition, it was illustrated that the coil pad 20 may be selectively inserted into the charger body 10. Although, in the accompanying drawings for explaining the embodiment of the present invention, only one coil pad 20 is selected and inserted, the present invention is not limited to this, the charger body 10 as necessary It is also possible to insert a plurality of coil pad 20 in the interior.

In addition, a circuit diagram embedded in the circuit unit 13 may generate power required to power the contactless battery 31 using, for example, a DC power source such as a cigarette lighter power source of a vehicle, rather than a commercial AC power source of 110V or 220V. .

Furthermore, the charger body 10 may further include a status indicator light indicating a state of charge of the contactless battery 31, a small liquid crystal display device, or a speaker.

Meanwhile, in FIG. 1, the electronic device 30 including the contactless battery 31 is illustrated as an example of a mobile phone, a notebook computer, a wireless cleaner, and the like. However, the present invention is not limited thereto, but a PDA, a portable MP3 player, a CD player, and the like. Of course, it is applicable to a variety of portable electronic devices.

 As such, when the battery charge set according to the embodiment of the present invention is used, the user does not need to have a plurality of contactless charging devices to charge the contactless battery 31 provided in the plurality of electronic devices. It holds one charger body 10 according to an embodiment. In addition, a contactless battery 31 or the corresponding contacting coil pad 20 inserted into one of the coil pads 20 selectively inserted into the coil pad 20 may be inserted into the coil pad 20. The contactless battery 31 can be charged by selecting the electronic device 30 having the contactless battery 31 and placing the electronic device 30 on the charging reservoir 11 of the charger body 10.

Although the present invention has been described above by means of limited embodiments and drawings, the present invention is not limited thereto and will be described below by the person skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of the claims.

According to the contactless charger of the present invention and the battery charging set having the same, it is possible to charge with high charging efficiency by using a coil pad capable of selectively mounting contactless batteries having different sizes and capacities.

Claims (18)

In a contactless charger having a primary side coil for generating a magnetic field to be charged through the inductive coupling with the secondary side coil to the charging target having a secondary side coil, A plurality of coil pads accommodating and fixing the primary coils and forming different magnetic fields; And And a pad accommodating part for accommodating the plurality of coil pads, wherein a charging circuit is provided therein, and a charging body for supplying a high frequency alternating current to the primary coil when the coil pad is mounted to the pad accommodating part. Contactless charger. The method of claim 1, The coil pad is made of a PCB plate, the primary coil is contactless charger, characterized in that the pattern formed on the PCB plate. The method of claim 2, Contactless charger, characterized in that the primary coil is made of copper. The method of claim 1, And the coil pads generate magnetic flux in the same direction. The method according to any one of claims 1 to 4, Contactless charger, characterized in that the wound shape of the primary coil has a substantially planar circular shape. The method according to any one of claims 1 to 4, And the wound shape of the primary coil has a substantially planar polygonal shape. The method according to any one of claims 1 to 4, The contactless charger, characterized in that each of the primary coil provided in the plurality of coil pads has a pattern of a different shape. The method according to any one of claims 1 to 4, Contactless charger, characterized in that each of the primary coil provided in the plurality of coil pad has a different inductance value. The method of claim 8, The charging body is a contactless charger, characterized in that a plurality of coil pads can be stored at the same time. A plurality of coil pads accommodating and fixing the primary coils to form different magnetic fields, and a pad accommodating part for accommodating the plurality of coil pads, and a charging circuit is provided therein so that the coil pads are pads A contactless charger including a charging body for supplying high frequency AC power to the primary coil when it is mounted in a housing; And A battery cell that can be charged using power input from the outside, a secondary side coil inducing high frequency AC power through electromagnetic coupling with a magnetic field formed by the contactless charger, and a high frequency AC input from the secondary side coil And a plurality of contactless battery packs having a charging power supply unit configured to convert power into power required for charging the battery cell. The method of claim 10, The coil pad is made of a PCB plate, the primary coil is a battery charge set, characterized in that the pattern formed on the PCB plate. The method of claim 11, And the primary coil is made of copper. The method of claim 10, And the plurality of coil pads generate magnetic flux in the same direction. The method according to any one of claims 10 to 13, And a wound shape of the primary coil and the secondary coil has a substantially planar circular shape. The method according to any one of claims 10 to 13, And a wound shape of the primary coil and the secondary coil has a substantially planar polygonal shape. The method according to any one of claims 10 to 13, Each of the primary coils provided in the coil pads may be formed in a pattern having a different shape. The secondary coil provided in the battery pack is a battery charging set, characterized in that formed in a shape corresponding to the shape of the primary coil made of a different shape pattern. The method according to any one of claims 10 to 13, Each of the primary coils provided in the coil pads has a different inductance value, And a plurality of the battery packs generate power of a magnitude corresponding to the inductance value and supply the generated power to the battery cells. The method of claim 17, The charging body is a battery charging set, characterized in that a plurality of coil pad can be accommodated at the same time.

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