Anti-saturation magnetism isolating sheet and preparation method thereof

Abstract

The invention discloses an anti-saturation magnetism isolating sheet and a preparation method thereof. The anti-saturation magnetism isolating sheet is applied to the field of wireless charging. The preparation method specifically comprises the steps: S1, selecting a nanocrystalline soft magnetic material and carrying out slitting treatment and winding treatment on the nanocrystalline soft magnetic material to obtain a first magnetic core; S2, performing heat treatment on the first magnetic core to obtain a second magnetic core; S3, carrying out attaching treatment on the second magnetic coreand a double faced adhesive tape to obtain a first base material; S4, carrying out rolling crushing treatment on the first base material through a specially-made roller shaft to obtain a second base material; S5, carrying out self-adhesion treatment on the second base material to obtain a semi-finished product with a certain number of layers formed by self-adhesion of the second base material; andS6, carrying out die cutting treatment on the semi-finished product to obtain the anti-saturation magnetism isolating sheet. The magnetism isolating sheet prepared by the invention has high saturation current, is thin in product thickness and simple to prepare, and is suitable for batch production in factories.

Description

technical field [0001] The invention relates to the technical fields of wireless charging and electromagnetic shielding, in particular to an anti-saturation magnetic isolation sheet and a preparation method thereof. Background technique [0002] Wireless charging technology (Wireless charging technology) is a technology based on wireless energy transmission. According to the charging power, it can be divided into high-power wireless charging and low-power wireless charging. High-power wireless charging uses resonance, such as wireless charging for electric vehicles. The low-power wireless charging uses electromagnetic induction, such as smart phones, smart watches, electric toothbrushes, etc. Wireless charging has become popular in mobile phones, and there are many products in the wearable field. In the future, wireless charging will be popularized in homes, offices, public places, travel tools, and transportation. The transmitting end and the receiving end of the wireless...

AI Technical Summary

Problems solved by technology

[0003] At the same time, with the increase of mobile phone battery capacity, people's demand for wireless fast charging is increasing, from the initial 5W to the current 20W, but the saturation current of the magnetic isolation sheets currently on the market is relatively low, and it is impossible to continue Increase charging power - According to the principle of electromagnetic induction, we know that when the current reaches a certain value, the magnetic induction intensity will reach saturation. At this time, if we continue to increase the current, it will not affect the charging power - so, if we want to continue to increase charging Power, it is necessary to increase the current when the magnetic induction intensity reaches saturation, that is, the current value of the saturation current

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