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Wireless power transmission apparatus, supply power control method for wireless power transmission apparatus, and manufacturing method for wireless power transmission apparatus

A wireless power transmission and power control technology, applied in circuit devices, battery circuit devices, transportation and packaging, etc., can solve problems such as shortening the life of rechargeable batteries, charging circuits, and inability to charge

Inactive Publication Date: 2015-10-28
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reason is listed as follows: If the power (current) supplied to the rechargeable battery is less than the value within the specified range, it will become a small power (small current), and charging cannot be performed due to the characteristics of the rechargeable battery; If the power (current) supplied by the battery is greater than the value within the specified range, it will become an overcurrent, and the rechargeable battery and the charging circuit will generate heat, which will shorten the life of the rechargeable battery and the charging circuit.

Method used

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  • Wireless power transmission apparatus, supply power control method for wireless power transmission apparatus, and manufacturing method for wireless power transmission apparatus
  • Wireless power transmission apparatus, supply power control method for wireless power transmission apparatus, and manufacturing method for wireless power transmission apparatus
  • Wireless power transmission apparatus, supply power control method for wireless power transmission apparatus, and manufacturing method for wireless power transmission apparatus

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Experimental program
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Effect test

Embodiment approach

[0052] First, before describing the power supply control method of the wireless power transmission device and the manufacturing method of the wireless power transmission device, the wireless power transmission device 1 designed and manufactured by the power supply control method or the manufacturing method will be described.

[0053] (Structure of wireless power transmission device 1)

[0054] Such as figure 1 As shown, the wireless power transmission device 1 includes a power supply module 2 including a power supply coil 21 and a power supply resonator 22 , and a power receiving module 3 including a power receiving coil 31 and a power receiving resonator 32 . Furthermore, an AC power source 6 having an oscillation circuit for setting the drive frequency of the electric power supplied to the power supply module 2 to a predetermined value is connected to the power supply coil 21 of the power supply module 2 , and is connected to the power reception coil 31 of the power recepti...

other Embodiment approach

[0218] In the description of the above-mentioned manufacturing method, the wireless headphone 200 was exemplified and described, but as long as it is a device equipped with a rechargeable battery, it can also be used in a tablet PC, a digital camera, a mobile phone, and an earphone-type music player. , hearing aids, sound collectors, etc.

[0219] In addition, in the above description, the wireless power transmission device 1 that performs power transmission by utilizing the resonance phenomenon (magnetic field resonance state) between the resonators (coils) of the power supply module 2 and the power reception module 3 to couple the magnetic field is exemplified. For the sake of explanation, it can also be applied to the wireless power transmission device 1 that performs power transmission using electromagnetic induction between coils.

[0220] In addition, in the above description, the case where the wireless power transmission device 1 is mounted on a portable electronic dev...

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Abstract

Provided are: a wireless power transmission apparatus with which an input impedance value is set by adjusting coupling coefficients between coils provided to a power supply device that wirelessly transmits power and a power receiving device, without adding new equipment, thereby enabling the power (the current) to be supplied to be controlled; a supply power control method; and a manufacturing method for the wireless power transmission apparatus. The supply power control method for the wireless power transmission apparatus (1), wherein power is supplied from a power supply module (2) to a power receiving module (3) by altering a magnetic field, involves adjusting coupling coefficient values between adjacent coils so as to set an input impedance (Zin) value of the wireless power transmission apparatus (1) to a desired value, and adjust the power to be supplied.

Description

technical field [0001] The present invention relates to a wireless power transmission device capable of adjusting electric power for wireless power transmission, a supply power control method of the wireless power transmission device, and a manufacturing method of the wireless power transmission device. Background technique [0002] In recent years, portable electronic devices such as notebook PCs, tablet PCs, digital cameras, mobile phones, portable game consoles, earphone music players, wireless headsets, hearing aids, recorders, etc. universal. Moreover, most of these portable electronic devices are equipped with rechargeable batteries, which require regular charging. In order to simplify the charging operation of the rechargeable battery of the electronic device, the power supply technology using wireless power transmission (wireless power transmission by changing the magnetic field to perform power transmission) is adopted between the power supply device and the power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J17/00H01F38/14H02J7/00
CPCH02J17/00H01F38/14H02J50/12H02J7/00304H02J7/00302
Inventor 畑中武蔵津田尚
Owner NITTO DENKO CORP
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