Apple patents stacked wireless charger design with extra magnetic parts
Apple describes a wireless charging setup that stacks three coils on top of each other to improve power transfer. The design uses extra magnetic material and a segmented metal shield to guide the energy more efficiently between the coils.
In the filing’s own words
A multi-coil wireless power transfer (WPT) arrangement can include a magnetic core; first and second WPT coils positioned adjacent one another above the magnetic core; a third WPT coil positioned above the first and second wireless power transfer coils; a magnet ring located above the first and second wireless power transfer coils; additional magnetic core material disposed atop the magnetic core and associated with the third WPT coil. The first and second WPT coils can be separated by a separation distance selected to accommodate the additional magnetic core material; and a segmented metallic shield positioned between the magnet ring and the first and second wireless power transfer coils. The additional magnetic core material can include a base portion disposed atop the magnetic core and beneath the third wireless power transfer coil and/or a post portion disposed atop the base portion and within the third wireless power transfer coil.
What exactly they claim (claim 1)
1. A multi-coil wireless power transfer arrangement comprising: a magnetic core; first and second wireless power transfer coils positioned adjacent one another above the magnetic core; a third wireless power transfer coil positioned above the first and second wireless power transfer coils; a magnet ring located above the first and second wireless power transfer coils; additional magnetic core material disposed atop the magnetic core and associated with the third wireless power transfer coil, wherein the first and second wireless power transfer coils are separated by a separation distance selected to accommodate the additional magnetic core material; and a segmented metallic shield positioned between the magnet ring and the first and second wireless power transfer coils.
Facts
- Company
- Apple (Apple Inc.)
- Official title
- Multi-coil wireless charger
- Patent number
- US12749924B2
- Application number
- 18164745
- Filed
- Feb 6, 2023
- Granted
- Sep 29, 2026
- Inventors
- 2
- Claims
- 24
Classified under
H02J 50/402 Electricity & electronicsH01F 27/24 Electricity & electronicsH02J 50/005 Electricity & electronicsH02J 50/12 Electricity & electronicsMore from Apple in Batteries & energy
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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.