Non-contact power supply device provided with temperature sensor

Abstract

The invention provides a non-contact power supply device provided with a temperature sensor, which can be used to measure the temperature of the plane coil accurately, to prevent the concave-convex parts of the appearance as much as possible, to set the temperature sensor or the accommodation of the coils easily, and has a good responsive performance. The non-contact power supply device provided with the temperature sensor is provided with a transmission coil (2) formed by the swirling-shaped coils, and a circuit part (3) used for controlling the AC voltage applied on the transmission coil (2). The AC voltage can be applied on the transmission coil (2) by supplying power to the device, to which the power is supplied, or the device to be charged by the electromagnetic induction. A film-shaped temperature sensor (5) of a thermosensitive part (4), the resistance of which can be changed according to the temperature, is disposed on the transmission coil (2), and the thermosensitive part (4) is winded on one part of the coils (2a).

Description

Technical field [0001] The invention relates to a non-contact power supply device with a temperature sensor capable of measuring the temperature of a planar coil. Background technique [0002] In recent years, a non-contact power supply device that can perform power supply or charging in a non-contact manner only by placing a powered device such as a mobile phone or a charged device on a power supply stand or charging stand. Known as this non-contact power supply device, for example, electromagnetic induction generated by applying an AC voltage to a planar coil composed of a spiral winding wire transmits power to a powered device or a charged device, thereby providing power in a non-contact manner. Or charging device. [0003] In the past, in such a non-contact power supply device, in order to detect abnormal heating of the planar coil, the temperature sensor of the lead type thermistor was attached to the planar coil, or the circuit mounted chip thermistor near the planar coil wa...

AI Technical Summary

Problems solved by technology

[0006] That is, when a lead-type thermistor is attached to a planar coil as a temperature sensor, since the outer peripheral surface of the winding wire is a curved surface, the contact area is small and it is difficult to perform accurate temperature measurement. Unfavorable conditions such as difficulty in measuring accurate temperature due to heat capacity, and low responsiveness

In addition, if a conventional temperature sensor is installed on a planar coil, unevenness will appear on the planar coil, and it will be difficult to house it in a case, etc., and it will be difficult to reduce the thickness of the device. Therefore, there is also a problem that it is difficult to secure an installation location for the temperature sensor.

And when a temperature sensor such as a chip thermistor is installed on the circuit side instead of the planar coil, it is difficult to measure the accurate temperature of the planar coil because the temperature of the planar coil is measured indirectly.

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