KR20060107148A - Wireless charger - Google Patents

Abstract

The present invention relates to a wireless charger, which is equipped with an electronic device having a built-in wireless charging battery, a cradle provided with a primary coil for dissipating electromagnetic energy corresponding to a supplied power; And a detection member capable of detecting suitability for charging in the charging region of the cradle.

Wireless Charger, Thermal Sensor, Thermal Sensor, Leakage Magnetic Field, Distortion, Detection Coil

Description

Wireless charger {Wireless charger}

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 an exploded perspective view of a wireless charger according to a preferred embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along line II-II 'of FIG. 1. FIG.

3 is a circuit diagram of a controller of a wireless charger according to a preferred embodiment of the present invention.

Figure 4 is a perspective view of the main part of the detection member of the wireless charger according to another preferred embodiment of the present invention.

<Description of main reference numerals in the drawings>

102 Mounting station 104 Filling area 106 Detection member

110 ... primary coil 120 ... body 130 ... board

140 Control panel 150 Sensor pack 160 Detection coil

The present invention relates to a wireless charger, and more particularly to a wireless charger having a structure capable of detecting the suitability of charging in the charging area in order to increase the charging efficiency of the wireless charger.

Generally, a device such as a mobile phone, an MP3 player, an MD player, a walkman, a notebook computer, or the like has a battery inside and is configured to be used while the user moves. The portable mobile device includes a separate power storage device for power storage of the battery, and the power storage device is connected to a general use power source to provide a storage current to the battery of the mobile mobile device. On the other hand, in order for the power storage device to provide the storage current to the storage battery of the portable mobile device, the charging matrix constituting the power storage device and the storage battery in the mobile mobile device must be electrically connected. In order to selectively connect the battery in the charging matrix and the portable mobile device as necessary, separate contact terminals have been configured in the charging matrix and the portable mobile device, respectively. Therefore, when charging the storage battery in the portable mobile device, the contact terminal of the portable mobile device and the contact terminal of the charging mother must be interconnected.

However, the conventional method of configuring the contact terminals in the portable mobile device and the charging mother as described above, in addition to the problem that the contact terminals protrude to the outside and look aesthetically unsightly, the contact terminals may be contaminated with this foreign material and thus the contact state is poor. There are many concerns, and 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 rechargeable battery of a mobile mobile device can be electrically contacted with a charging mother to charge energy of the charging mother.

In the non-contact charging method, a primary coil of a transformer operating at a high frequency is configured in a charging matrix, and a secondary coil is configured in a storage battery, that is, a portable mobile device. It is a way to provide.

However, in the conventional wireless charger, a foreign material such as a magnetic material is exposed in the charging region of the charger, a distortion signal is generated due to a change in the charging magnetic field due to the disturbance of the electronic environment due to various electronic devices, or the direction of the charging magnetic wire is changed. There is a possibility that an unsuitable situation such as distorting or distorting of the energy flow itself or the like becomes impossible, or the charging efficiency is sharply lowered. This situation needs to be eliminated as much as possible, and a countermeasure is required.

The present invention was conceived in view of the above, and is always optimally detected by detecting foreign substances or various types of distortion signals that may exist in the charging region of the main body, direction distortion of the magnetic field of charge, and energy flow distortion early. The purpose is to provide a wireless charger that can improve the charging efficiency by maintaining the state.

In order to achieve the above object, the wireless charger according to a preferred embodiment of the present invention, the electronic device with a built-in wireless charging battery is mounted, the primary coil to emit electromagnetic energy corresponding to the power supplied A cradle provided; And a detection member capable of detecting suitability for charging in the charging region of the cradle.

Preferably, the detection member is provided with a heat sensor for sensing the heat generated from a predetermined conductor existing in the charging area.

Preferably, the detection member is provided with a control unit for blocking the input power applied to the primary coil when charging is not suitable.

Preferably, the detecting member includes a sensing coil installed to sense at least one of a distorted signal, a direction distortion of the charging magnetic force line, and a distortion of the energy flow by an organic current.

Preferably, the sensing coil is disposed substantially perpendicular to the direction of the primary coil.

Preferably, at least one pair of the sensing coils are installed to sense each of the induced currents in directions opposite to each other.

1 is an exploded perspective view of a wireless charger according to a preferred embodiment of the present invention, and FIG. 2 is a sectional view taken along the line II-II 'of FIG. 1.

1 and 2, the wireless charger 100 according to the present embodiment may be equipped with an electronic device (not shown), and the primary coil 110 may be configured to emit electromagnetic energy corresponding to the supplied power. A cradle 102 provided; And a detection member 106 capable of detecting suitability for charging in the charging region 104 of the cradle 102.

The cradle 102 is a board on which a main body 120 on which a charging object (not shown) can be mounted, such as an electronic device having a built-in wireless charging capacitor, or a battery thereof, and a primary coil 110 can be installed. 130 is provided. The body 120 and the board 130 may be provided integrally, but in this embodiment, it is preferable that the structure can be separated from each other as necessary. In addition, the main body 120 of the cradle 102 includes all structures in which the object to be charged may be naturally positioned as a central portion including the charging area 104.

The main body 120 has a substantially hexahedral shape, a high edge portion, a low center portion, and a flat structure. Therefore, when the charging object is placed on the main body 120, the charging object naturally moves to the center portion of the main body 120, thereby maintaining an optimal charging standby state.

The board 130 may be externally supplied with power and may include a primary coil 110 capable of forming an electromagnetic field by the applied power, and a controller capable of controlling current or voltage of the primary coil 110 ( 140: see FIG. 3).

The primary coil 110 may have a predetermined magnetic field concentrated in the central portion of the main body 120, and includes all coil structures that allow electromagnetic force lines to be formed perpendicularly from the plane of the board 130. Therefore, although the spiral primary coil 110 is used in the present embodiment, the primary coil 110 is not limited thereto, and various types of coil structures may be adopted.

The detection member 106 may be configured to detect a change in temperature of the heat holder 102 generated by a foreign material (not shown), such as a ferromagnetic material, which may be present in the charging region of the main body 120 in real time. It includes a heat sensor 150 installed in the center portion.

The thermal sensor 150 detects in real time information about the difference between the temperature of the normal state of the charger 100 and the temperature of the abnormal state caused by the foreign matter is placed in the main body 120 to control the information in real time. To send. To this end, the thermal sensor 150 is compared with the total amount of heat generated under the influence of the base heat generated from the primary coil 110 and the foreign matter is placed in the main body 120 during the charging process to compare the difference Accordingly, the heat generation may be detected, or the total heat amount of the main body 120 generated during the charging process may be simply detected. In the latter case, it is natural that a reference value for a predetermined predetermined steady state calories should be determined.

The thermal sensor 150 may be individually installed on the surface of the main body 120, but the physical and electrical coupling may be completed by coupling the modular sensor pack 152 to the main body 120 in a one-touch manner. Preferred structures are preferred.

Content sensed by the thermal sensor 130 may be connected to the above-described electrical circuit, and a display unit (not shown) such as a separate lamp or panel may be displayed.

3 is a circuit diagram of a controller of a wireless charger according to a preferred embodiment of the present invention.

Referring to FIG. 3, the controller 140 generates a control signal for controlling the power applied to the primary coil 140 from the power supply based on the signal transmitted from the thermal sensor 150. The controller 140 cuts off the input power applied to the primary coil 110 when foreign matter is placed on the main body 120 and heat is generated while the temperature of the main body 120 is increased. In addition, the controller 140 may block the operation of the wireless charger by other operations.

4 is a perspective view of a main portion of the detection member of the wireless charger according to another preferred embodiment of the present invention. The same components as those described in FIGS. 1 to 3 are the same members with the same functions.

Referring to FIG. 4, the wireless charger board 132 according to the present embodiment includes a sensing coil 160 as a kind of detection member. The sensing coil 160 includes a sensing coil 160 installed in a predetermined form on the board 132 to detect at least one of a distorted signal, a direction distortion of a charging magnetic line, and a distortion of energy flow by an organic current. do.

The sensing coil 160 is basically for detecting leakage magnetic flux in the charging region 104 and is disposed substantially perpendicular to the direction of the primary coil 110. Because, as the direction of the cross-sectional area inside the coil coincides with each other, the induced currents are more strongly induced to each other. This is because is not induced, and as the basic charging flux deviates from the normal direction, more organic current is generated in the sensing coil 160.

Therefore, in a situation where much distortion is caused from the basic charging magnetic flux direction A, the amount of current that can be induced in the sensing coil 160 increases, so that the surrounding situation of the charging region may not be suitable for charging. The situation where the amount of current induced in the sensing coil 160 exceeds the threshold means that the charging efficiency is low because the basic charging energy of the wireless charger 100 flows in the other direction, and thus, the sensing coil 160 When a predetermined amount of induced current is detected, the signal is sent to the control unit 140 after passing through the A / D circuit, so that the control unit 140 controls the charging operation or transmits another warning signal.

The sensing coils 160 are installed in at least one pair so as to sense organic currents in opposite directions. That is, the sensing coil 160 is installed in the ㅁ X direction and ㅁ Y direction of FIG. 4, respectively.

That is, each of the sensing coils 160 may change the electric field that is affected by the change of frequency between the primary coil 110 of the charger 100 and the secondary coil (not shown) of the battery for the electronic device. Many unexplained problems, such as the effects of invisible electromagnetic waves, inadequate circuit conditions, malfunctions due to the heat generated by each device, changes in ambient humidity or temperature, etc. This is to detect whether the electric field is distorted by

As described above, the shape of the primary coil installed on the board is interpreted to include all coil structures that make the direction of the electromagnetic force lines perpendicular to the plane of the board.

As described above, the wireless charger according to the present invention has the following effects.

In order to detect foreign matters that may be placed on the mount, a thermal sensor is installed to detect the temperature rise caused by the foreign matters. By installing a sensing coil capable of detecting distortion in advance in a predetermined portion of the holder, it is possible to increase the stabilization and charging efficiency of the charging region of the wireless charger.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Various modifications and variations are possible, of course, within the scope of equivalents of the claims to be described.

Claims (6)

An electronic device with a built-in wireless rechargeable battery is mounted, and a cradle provided with a primary coil to emit electromagnetic energy corresponding to a supplied power; And And a detecting member capable of detecting suitability of charging in the charging region of the cradle. The method of claim 1, The detection member, And a heat sensing sensor capable of detecting heat generated from a predetermined conductor existing in the charging region. The method according to claim 1 or 2, The detection member, And a control unit which cuts off the input power applied to the primary coil when charging is not suitable. The method of claim 1, And the detecting member has a sensing coil installed to sense at least one of a distorted signal, a direction distortion of the charging magnetic force line, and a distortion of energy flow by an organic current. The method of claim 4, wherein The sensing coil is a wireless charger, characterized in that disposed substantially perpendicular to the direction of the primary coil. The method according to claim 4 or 5, The sensing coil is a wireless charger, characterized in that at least one or more pairs are installed so as to detect each of the induced current in the direction opposite to each other.

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