A high-power wireless charging magnetic coupling mechanism and its power transmission system

Abstract

The invention discloses a high-power wireless charging magnetic coupling mechanism and an electric energy transmission system thereof, belonging to the field of wireless charging. The magnetic coupling mechanism includes a primary mechanism and a secondary mechanism, and the primary mechanism and the secondary mechanism are completely symmetrical. From bottom to top, the primary side mechanism consists of aluminum shell heat dissipation cover, fan, radiator assembly, magnetic core assembly, insulating plate assembly, coil layer, silica gel layer and insulating pressure plate. The power exceeding 100 kilowatts is wirelessly transmitted between the primary side mechanism and the secondary side mechanism. . In the present invention, the wireless charging magnetic coupling mechanism is applied to high energy density transmission scenarios. The primary side mechanism and the secondary side mechanism can still maintain a high level of coupling coefficient at a long distance, which reduces the energy loss in the wireless charging process and has excellent heat dissipation. High performance and magnetic shielding performance, realizing lightweight of high-power wireless charging.

Description

technical field [0001] The invention belongs to the technical field of wireless charging, and more particularly, relates to a high-power wireless charging magnetic coupling mechanism and a power transmission system thereof. Background technique [0002] Electromagnetic induction wireless charging has been widely and maturely used in electric vehicles, but the current power is only kilowatts. For high-power wireless charging systems with power exceeding 100 kilowatts, the wireless charging magnetic coupling mechanism is required to have high power density, as well as a compact and simple structure, which requires high system stability. At the same time, in order to reduce magnetic leakage, the requirements for magnetic shielding Also higher. [0003] At present, the magnetic coupling mechanism of high-power wireless charging mostly adopts the flat plate structure, that is, the back of the circular coil is attached to a whole plane magnetic core. This structure is simple in s...

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Problems solved by technology

[0003] At present, the magnetic coupling mechanism of high-power wireless charging mostly adopts a flat plate structure, that is, a whole planar magnetic core is attached to the back of a circular coil. This structure is simple in structure, and has better transmission efficiency and anti-offset characteristics. It does not make full use of the height of the coupling mechanism to strengthen the magnetic field in the height direction of the coupling mechanism, resulting in that although the coupling mechanism can be made thinner, its area is too large, the power density is low, the loss is large, and the magnetic shielding effect is poor. Most of them do not consider the heat dissipation of the magnetic coupling mechanism

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