KR20050096068A - Non-contact battery charging system possible multi-charging and core block design method for it - Google Patents

Abstract

The present invention relates to a charging receiver module (B) in which a coil having a predetermined pattern is wound around an amorphous metal thin film core in which a plurality of cobalt-based amorphous metals are stacked, and in a vertical direction in parallel with the charging receiver module (B). A wireless charging pad (A) is disposed to be spaced apart a predetermined distance and is magnetically coupled to the charging receiver module (B), wherein the wireless charging pad (A) is attached to a plurality of small cores of cobalt-based or ferrite material The present invention relates to a multi-chargeable contactless battery charging system and a method of designing the core block, comprising a core block having a coil having a predetermined pattern formed on a flat plate core.

Description

NON-CONTACT BATTERY CHARGING SYSTEM POSSIBLE MULTI-CHARGING AND CORE BLOCK DESIGN METHOD FOR IT}

The present invention relates to a multi-charging contactless battery charging system and a core block design method, and more particularly, a coil having a predetermined pattern is wound around an amorphous metal thin film core in which a plurality of cobalt-based amorphous metals are stacked. The charging receiver module (B) and the wireless charging pad (A) magnetically coupled to the charging receiver module (B) and disposed to be spaced apart at a predetermined distance in a vertical direction in parallel with the charging receiver module (B). The wireless charging pad A includes a core block in which a coil having a predetermined pattern is formed on a flat plate core to which a plurality of small cores of cobalt-based or ferrite material are attached. A contact battery charging system and a core block design method therefor.

Recently, with the development of communication and information processing technologies, the use of portable personal terminals such as mobile phones, camcorders, and laptops is gradually increasing, and new models of terminals having improved performances are continuously being distributed with the development of technology. to be. In order to solve the problem of a contact type charger or a contact type charger due to the external exposure of the contact type charger, a contactless charger for charging a battery using magnetic coupling without electrical contact is used.

As a technology corresponding to a contactless charger, wirelessly connects a battery pack and a charging device by using a magnetic core, such as a non-contact charging device of a storage battery for a portable mobile device by induction coupling, published in Japanese Patent Application Publication No. 2002-0035242. The method of charging by communication, the prior application published in Korean Patent Application Publication No. 2002-0057469, a printed circuit board (PCB: printed ultra-thin printed circuit board transformer and a contactless battery charger using the printed circuit board transformer) A method of solving a problem of a magnetic core using a transformer formed on a circuit board has been proposed.

However, in the prior art, there is no consideration of the charging efficiency or the change in the direction of charging due to the change in the magnetic field caused by the position of the portable terminal equipped with the battery or the arrangement between the portable terminal and the charger during charging. There was a difficulty in controlling, and there was a problem in that one or more portable terminals could not be charged at the same time.

Accordingly, an object of the present invention is to solve the conventional problems as described above, regardless of where the portable terminal equipped with the battery is placed in the charger regardless of the direction and position to maintain the power transmission efficiency The present invention provides a method for designing a contactless battery charging system capable of performing multi-charging and a core block thereof.

Another object of the present invention is to design the core block in consideration of the direction of the current flowing in the core block, the direction of the magnetic field, the configuration of the coil, to secure a certain portion of the effective charging area (Charging Effective Area) at least one portable terminal at the same time To provide a solid-state battery charging system and a core block design method for charging the.

In order to achieve the above object, a multi-charging contactless battery charging system according to the present invention includes a charging receiver module in which a coil having a predetermined pattern is wound on an amorphous metal thin film core in which a plurality of cobalt-based amorphous metals are stacked. B) and a wireless charging pad A disposed to be spaced apart at a predetermined distance in a vertical direction in parallel with the rechargeable receiver module B and magnetically coupled to the rechargeable receiver module B, wherein the wireless charging The pad A has a core block in which a coil having a predetermined pattern is formed on a flat plate core having a plurality of small cores made of cobalt-based or ferrite material.

In addition, the core block design method according to the present invention is a method for designing a core block to be mounted in the pad (A) for wireless charging, the flat core core is made of a plurality of small cores of cobalt-based or ferrite material Step 1, the second step of winding a coil of a predetermined pattern on the plate core to produce a core block consisting of the plate core and the coil, and the chain bridge flux 180 degrees → 135 degrees → 90 degrees → A third step in which a current having a switching pattern changing from a 45 degree direction to a 0 degree direction to a -45 degree direction to a -90 degree direction to a 135 degree direction is applied to the coil; and 360 by the current applied to the coil. A fourth step of generating a rotating magnetic field and a fifth step of forming a charging effective area having a rectangular or square shape in the center of the wireless charging pad A by the generated magnetic field; It is characterized by comprising.

In the following description of the preferred embodiments of the present invention in detail with reference to the accompanying drawings, when it is determined that the detailed description of the related known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Do it.

1 is a view showing a contactless battery charging system capable of multi-charging according to the present invention.

Referring to Figure 1, the multi-charging contactless battery charging system according to the present invention is a magnetic contact with a wireless charging pad (A), a wireless charging pad (A) that performs the function of a contactless charger to a contactless Controls whether charge / discharge is detected by detecting the state of a rechargeable receiver module (B) that receives power, a rechargeable battery (BAT) charged by the power supplied to the rechargeable receiver module (B), and a rechargeable battery. It comprises a circuit module (PCM).

The wireless charging pad A has a core block in which a coil having a predetermined pattern is formed on a flat plate core to which a plurality of cobalt-based or ferrite small cores are attached, and serves as a transformer primary side.

The rechargeable receiver module B is a coil having a predetermined pattern wound on an amorphous metal thin film core in which a plurality of cobalt-based amorphous metals are stacked, and serves as a secondary side of a transformer. The amorphous metal thin film core is a thin sheet or film in which a plurality of cobalt-based amorphous metal materials such as cobalt (Co), iron (Fe), nickel (Ni), boron (B), and silicon (Si) are laminated. Made of shaped core, it has high permeability and unbreakable property.

The rechargeable receiver module B (or the portable terminal or battery having the rechargeable receiver module B therein) is placed on the wireless charging pad A so that the two are spaced apart by a predetermined distance in the vertical direction in parallel. Then charge. When the wireless charging pad (A) and the charging receiver module (B) are arranged in parallel to have a predetermined distance in the vertical direction, the core block and the charging receiver module (B) inside the wireless charging pad (A) are magnetically disposed. Combined to perform contactless charging.

The wireless charging pad (A), which operates as a contactless charger, has various ports with DC inputs and is connected to various types of external power sources (e.g., output of AC adapter, USB port of computer or cigar jack of car). It can be used to generate a switching pattern of a coil provided therein, detect a device placed on a pad, and control a power saving mode. Coils are wound and embedded in various patterns in the wireless charging pad A so that the interlinked magnetic flux is induced to the charging receiver module B through switching of 10 kHz or more.

The wireless charging pad A according to the present invention may include, for example, a microprocessor unit (MPU), a sensing device, a drive circuit, and two primary coils.

First, when a user places a portable terminal in which the rechargeable receiver module B is embedded on the wireless charging pad A, the sensing device detects that a chargeable device is placed. In this case, the oscillation signal oscillated at a predetermined frequency is received by a sensing device such as a magnetic field sensor, and the balance of the oscillation signal received as the amorphous metal thin film core and the coil of the charging receiver module B approaches the sensing device. The device can be detected, for example, by detecting a break. When the sensing device detecting the approach of the charging receiver module B transmits a device detection signal to the MPU, the received MPU generates a switching pattern of each of the two primary coils, and the two primary coils are generated by the MPU. By the switching pattern. The drive circuit is an on-off switching element for switching each of the two primary coils, which is composed of an up switch and a low switch, and can be implemented by a half-bridge series resonant converter. Can be.

The protection circuit module (PCM) according to the present invention may include, for example, a rectification circuit, a charging circuit, a protection circuit, a control circuit, and the like.

The protection circuit module (PCM) is a rectifier circuit for converting the power supplied from the rechargeable receiver module (B) into a direct current, the power converted in the rectifier circuit for the rechargeable battery (BAT) (that is, a lithium ion battery or a lithium polymer battery, etc.). Charging circuit for supplying rechargeable secondary battery), protection circuit for determining the supply and interruption of electric power supplied to the rechargeable battery BAT from the charging circuit by checking the state of the rechargeable battery BAT It measures the voltage and current of the battery BAT, provides information on the usage time and the charging capacity, and accumulates the information provided to connect to the rechargeable battery BAT through a control circuit that corrects the charging / discharging capacity.

2 is a view showing a magnetic field generating method according to a switching pattern of a pad for wireless charging according to the present invention.

In the case of applying current by switching with a constant frequency continuously in the order of 1 section → 2 sections → 3 sections → 4 sections → 5 sections → 6 sections → 7 sections → 8 sections, as shown in FIG. flux) and the magnetic field rotates 360 degrees in the order of 180 degrees → 135 degrees → 90 degrees → 45 degrees → 0 degrees → −45 degrees → −90 degrees → −135 degrees. In this case, when the portable terminal in which the charging receiver module B is built is placed on the wireless charging pad A, charging is possible regardless of the position and the direction.

3 is a view showing the size expansion of the wireless charging pad according to the number of charging devices according to the present invention.

In the wireless charging pad A, a core block including a flat core and a coil formed in a predetermined pattern on the flat core is provided. Flat cores can be shaped into any size and shape by attaching multiple small cores of cobalt or ferrite material. For example, by attaching m horizontally and n vertically pieces, a flat plate core is created according to the number of devices to be charged.

4 is a view showing a charging receiver module according to a first embodiment of the present invention.

4, the charging receiver module (B) according to the first embodiment of the present invention is coiled to form a rectangular, square or spiral pattern on the amorphous metal thin film core, the wireless charging for the primary transformer side When the magnetic field rises vertically in the pad A, the current by the induced electromotive force flows in the counterclockwise direction from the charging receiver module B which is the secondary side of the transformer.

5A to 8 illustrate the core block structure of the wireless charging pad A for enabling charging regardless of the direction and position when the charging receiver module B is configured as shown in FIG. 4.

5A and 5B illustrate a vertical coil and a horizontal coil constituting a core block of a wireless charging pad according to a first embodiment of the present invention, respectively.

FIG. 5A shows a vertical coil in which a pattern is formed by winding a coil counterclockwise in a vertical direction out of the charging region. At this time, the winding direction of the coil and the direction of the current are shown in the drawing. The rectangular area indicated by the dotted line becomes the actual charging effective area. 5B illustrates a horizontal coil winding a coil horizontally to form a pattern. In this case, the pattern is formed in the same structure as the coil in which the vertical coil shown in FIG. 5A is rotated 90 degrees to the left.

That is, the vertical coil has a planar structure in which the coil is spiraled outward in the counterclockwise direction from the vertical center line, and the horizontal coil has a planar structure in which the coil is wound so as to spiral outward in the counterclockwise direction from the horizontal centerline. To form. With this structure, the vertical coil pattern in the charging region enables vertical movement of the charging receiver module B, and the horizontal coil pattern enables left and right movement of the charging receiver module B, and the vertical coil and horizontal It is also possible to cope with the tilt of the charging receiver module B when the coils are switched simultaneously.

6 to 8 are diagrams showing the core block of the pad for wireless charging according to the first embodiment of the present invention.

6 to 8 have been configured assuming various forms of coils that intersect the vertical and horizontal coils capable of multi-charging. FIG. 6 is a structure in which vertical and horizontal coils are stacked by crossing one-to-one (1: 1), and FIG. 7 is a structure in which vertical and horizontal coils are stacked by two-to-one (2: 1), and FIG. 8 is vertical. This structure is a structure in which horizontal coils are stacked with two teeth (2: 2). At this time, after bending both ends in the vertical or horizontal direction in common by crossing the vertical, horizontal coils, and then inserted into the flat plate in the form of a drawer to completely wrap the flat core to complete the entire core block. The figure shows the winding direction of the coil and the direction of the current. In the case of connecting a plurality of vertical coils or horizontal coils, the magnetic fields are adjacent to each other so as not to cancel the directions. Accordingly, charging is performed regardless of the position and orientation of the plurality of portable devices in which the charging receiver module B is incorporated.

9 is a view showing a charging receiver module according to a second embodiment of the present invention.

Referring to FIG. 9, the charging receiver module B according to the second embodiment of the present invention winds the coil so that the vertical coil wound in the vertical direction and the horizontal coil wound in the horizontal direction cross the amorphous metal thin film core. Make. Through this structure, sufficient power is received from the wireless charging pad A so that the charging receiver module B can be charged regardless of the position and orientation of the portable device in which the charging receiver module B is embedded.

10 to 14 are diagrams showing a core block of a wireless charging pad according to a second embodiment of the present invention. 10 to 14 illustrate the core block structure of the wireless charging pad A for enabling charging regardless of the direction and position when the charging receiver module B is configured as shown in FIG. 9.

FIG. 10 is effective as a vertical coil (Coil 1, Coil 2) and a horizontal coil (Coil 3, Coil 4) that are spirally wound and stacked on a flat plate core, respectively. In the charging effective area, charging is possible. In this area, the current is always rotated in a constant direction so that the magnetic field rotates 360 degrees. At this time, in the switching pattern, coil 1 and coil 2 are common, coil 3 and coil 4 are common, and the switching pattern is sequentially sequential from 1 to 8 in FIG. Repeat switching.

That is, the core block of the wireless charging pad (A) is a flat plate core by attaching coil 1 (Coil1) and coil 2 (Coil2) in which the coil is wound in a plane so as to spiral outward from the vertical center line in a vertical direction. A vertical coil formed to have the same size as and a coil 3 (Coil3) and a coil 4 (Coil4) in which the coil is wound in a plane so as to spiral outward in a counterclockwise direction from the horizontal center line, and are parallel to each other in the horizontal direction. The horizontal coils formed in the size are laminated on the flat core.

FIG. 11 is a laminate formed on a flat plate core by crossing coil 1 (Coil1), a vertical coil wound in an S shape, and coil 2 (Coil2), a horizontal coil wound in a spiral shape, and charging is performed in a charging effective area. In the case of a vertical coil wound in an S-shape, a magnetic field is generated in the left or right direction to enter the charging receiver module (B), and in the case of a horizontal coil wound in a spiral, a magnetic field is generated in the vertical direction. Enter (B). At this time, the magnetic field is evenly distributed to facilitate energy transfer. The switching pattern is the same as the method of FIG.

That is, the core block of the wireless charging pad A forms a horizontal coil having a flat structure in which coils are wound so as to spiral outward from the horizontal center line in a counterclockwise direction, and the horizontal length of the horizontal coil is longer than that of the flat core. It is bent at both ends to surround the plate core, and the right side of the planar structure in which the vertical coil is wound by a predetermined number of turns in the clockwise direction and the left side of the flat coil is wound by the predetermined number of turns in the counterclockwise direction. The S-shaped vertical coil is laminated on the horizontal coil.

FIG. 12 has a structure in which a single S-shaped coil pattern is stacked on a flat plate core, and the induced electromotive force is the same since the charging receiver module B has a coil structure having a crossed shape. However, the charging receiver module (B) may cause a problem of deterioration in efficiency, but is advantageous in terms of various cost reductions.

FIG. 13A is a vertical coil wound in an S-shape which winds the coil in a counterclockwise direction to the left after winding as many turns as desired in the vertical direction to the right. In the case of FIG. This is the same as rotating the pattern of the vertical coil wound in an S shape to the left by 90 degrees. As described above, the vertical and horizontal coils wound in an S-shape are each made and stacked on a flat plate core as shown in FIG. 14. In this case, the charging effective area has a structure in which the vertical coil faces upwards of the current direction of all coils, and in the horizontal coil, the current directions of all coils are leftward, and the section 1 shown in FIG. The magnetic field rotates 360 degrees when a switching pattern of up to 8 sections is applied to coil 1 and coil 2. Therefore, charging is possible in the charging effective area of the wireless charging pad A regardless of the position and the direction of the charging receiver module B. The direction of the magnetic field from the wireless charging pad A to the charging receiver module B is shown in the figure.

15 is a view showing a wireless charging pad and a charging receiver module according to a third embodiment of the present invention, Figures 16 and 17 are a wireless charging pad and a charging receiver module according to a third embodiment of the present invention A diagram showing the magnetic field distribution of.

15 to 17 are various types of structural diagrams of a charging receiver module B and a wireless charging pad A in which multiple cores are combined. Multiple cores are a series or parallel connection of multiple amorphous metal thin film cores with coils wound to form a rectangular, square, helical pattern or the like.

16 is a magnetic field distribution diagram of a charging receiver module (B) and a wireless charging pad (A) in which square multiple cores are connected in series or in parallel. FIG. 17 is a charging receiver module in which multiple cores of a spiral are connected in series or in parallel. Magnetic field distribution chart of (B) and the pad (A) for wireless charging. In this configuration, the magnetic field is concentrated in the vertical direction, thereby increasing power efficiency.

The core block mounted inside the wireless charging pad A according to the present invention is a first step in which a plurality of small cores of cobalt-based or ferrite material are combined to fabricate a flat plate core, and a coil having a predetermined pattern on the flat plate core. The winding is performed to produce a core block composed of the flat plate core and the coil, and the linkage flux is rotated 180 degrees → 135 degrees → 90 degrees → 45 degrees → 0 degrees → −45 degrees → − A third step of applying a current having a switching pattern changing from a 90 ° direction to a -135 ° direction to the coil; a fourth step of generating a magnetic field rotated 360 degrees by the current applied to the coil; By the fifth step of forming a charging effective area (Charging Effective Area) of the rectangular or square shape in the center of the wireless charging pad.

The present invention may be modified in various ways without departing from the basic concept according to the needs of those skilled in the art.

As described above, according to the present invention, a multi-charging capable of performing charging regardless of the direction and position by maintaining the power transfer efficiency regardless of where the portable terminal equipped with the battery is placed on the charger There is an effect that a method of designing a contactless battery charging system and its core block is provided.

In addition, according to the present invention, by designing the core block in consideration of the direction of the current flowing in the core block, the direction of the magnetic field, the configuration of the coil, and the like to secure a certain effective charging area (Charging Effective Area) at least one portable terminal at the same time There is an effect that a method of designing a contactless battery charging system capable of multi-charging and a core block capable of charging the battery is provided.

1 is a view showing a multi-charging contactless battery charging system according to the present invention.

2 is a view showing a magnetic field generating method according to a switching pattern of a pad for wireless charging according to the present invention.

3 is a view showing the size expansion of the wireless charging pad according to the number of charging devices according to the present invention.

4 is a view showing a charging receiver module according to a first embodiment of the present invention.

5A and 5B are views illustrating a vertical coil and a horizontal coil, respectively, constituting a core block of a wireless charging pad according to a first embodiment of the present invention.

6 to 8 are views showing a core block of the pad for wireless charging according to the first embodiment of the present invention.

9 is a view showing a charging receiver module according to a second embodiment of the present invention.

10 to 14 is a view showing a core block of a wireless charging pad according to a second embodiment of the present invention.

15 is a view showing a wireless charging pad and a charging receiver module according to a third embodiment of the present invention.

16 and 17 illustrate magnetic field distributions of a wireless charging pad and a charging receiver module according to a third embodiment of the present invention.

Explanation of symbols on main parts of drawing

A: Wireless charging pad B: Charging receiver module

PCM: protection circuit module BAT: rechargeable battery

Claims (11)

A charging receiver module (B) in which a coil having a predetermined pattern is wound on an amorphous metal thin film core in which a plurality of cobalt-based amorphous metals are stacked; It includes a wireless charging pad (A) is disposed so as to be spaced apart a predetermined distance in the vertical direction in parallel with the charging receiver module (B), and magnetically coupled to the charging receiver module (B), The wireless charging pad A includes a core block in which a coil having a predetermined pattern is formed on a flat plate core to which a plurality of small cores of cobalt-based or ferrite material are attached. system. The method of claim 1, The charging receiver module (B) is a coil wound around the amorphous metal thin film core to form at least one pattern of a square, a spiral, characterized in that the magnetic coupling with the wireless charging pad (A) Solid state battery charging system for multi-charging. The method of claim 2, The core block of the wireless charging pad (A) is a vertical coil having a coil structure in which the coil is spiraled outward in a counterclockwise direction from a vertical center line, and the coil is wound in a spiral outward in a counterclockwise direction from a horizontal center line. Forming at least one of the horizontal coil of the planar structure, the vertical coil or the horizontal coil is configured to bend both ends so as to surround the flat plate core, characterized in that the multi-chargeable contactless battery charging system. The method of claim 2, The core block of the wireless charging pad (A) is a coil in which a coil is wound so as to spiral outward in a counterclockwise direction from a horizontal centerline and a vertical coil in which the coil is wound in a spiral outward from a vertical centerline. A horizontal coil having a planar structure, wherein the vertical coil and the horizontal coil having a vertical length and a horizontal length longer than the flat plate core are respectively one-to-one (1: 1), two-to-one (2: 1), and two-to-two (2: 2). A non-contact battery charging system capable of multi-charging, wherein both ends are bent in a vertical and horizontal direction such that the coils intersect the flat plate cores while crossing each other. The method of claim 1, The charging receiver module (B) is a coil is wound so that the vertical coil wound in the vertical direction and the horizontal coil wound in the vertical direction to the amorphous metal thin film core is magnetically coupled to the wireless charging pad (A) A non-contact battery charging system capable of multi charging. The method of claim 5, The core block of the wireless charging pad (A) has a flat core and a coil core (Coil1) and a coil 2 (Coil2) in which the coil is wound in a plane so as to spiral outward from the vertical center line in a vertical direction. Vertical coils of the same size and coils 3 (Coil3) and coils 4 (Coil4) in which the coils are wound in a plane so as to spiral outward in a counterclockwise direction from the horizontal centerline in the horizontal direction, the same size as the flat core A multi-charging contactless battery charging system, characterized in that the horizontal coil formed by intersecting and stacked on the flat plate core. The method of claim 5, The core block of the wireless charging pad (A) forms a horizontal coil having a flat structure in which coils are wound so as to spiral outward from a horizontal center line in a counterclockwise direction, and both ends of the horizontal coil having a horizontal length longer than a flat core It is bent to surround the plate core, the right side of the vertical coil is wound by a certain number of turns (clock) in the clockwise direction, the left side of the planar structure of the vertical coil is wound by a certain number of turns (turn) in the counterclockwise direction A non-contact battery charging system capable of multi-charging, wherein a vertical magnetic coil is laminated on the horizontal coil. The method of claim 5, The core block of the wireless charging pad A has a flat structure in which a vertical coil is wound by a predetermined number of turns in the clockwise direction on the right side and a vertical coil is wound by a predetermined number of turns in the counterclockwise direction on the left side. And at least one of an S-shaped vertical coil and an S-shaped horizontal coil in which the S-shaped vertical coil is rotated 90 degrees to the left. The method of claim 5, The core block of the wireless charging pad A has a flat structure in which a vertical coil is wound by a predetermined number of turns in the clockwise direction on the right side and a vertical coil is wound by a predetermined number of turns in the counterclockwise direction on the left side. An S-shaped vertical coil and an S-shaped horizontal coil of a form in which the S-shaped vertical coil is rotated 90 degrees to the left are laminated on the flat plate core. The method of claim 1, The rechargeable receiver module (B) is a multi-chargeable solid-state battery, characterized in that a plurality of amorphous metal thin film cores are wound in series or in parallel to form a coil to form at least one of a rectangular, square, spiral pattern. Charging system. In the method for designing a core block mounted in the pad (A) for wireless charging, A first step of manufacturing a flat plate core having a plurality of small cores made of cobalt-based or ferrite; A second step of winding a coil of a predetermined pattern on the plate core to produce a core block composed of the plate core and the coil; A current having a switching pattern for changing the chain flux in the direction of 180 degrees → 135 degrees → 90 degrees → 45 degrees → 0 degrees → −45 degrees → −90 degrees → −135 degrees is applied to the coil. A third step of applying; A fourth step of generating a magnetic field rotated 360 degrees by the current applied to the coil; And a fifth step in which a charging effective area having a rectangular or square shape is formed at a center of the wireless charging pad A by the generated magnetic field.