GooglePatent applicationBatteries & energyInterest 4/10

Google patents wireless charging design using split capacitors

Google describes a wireless charging system that uses multiple coils paired with capacitors arranged in parallel. The design includes extra capacitor banks that can be switched in or out to adjust how the system resonates.

Why it mattersThis approach could help standardize or improve the efficiency of wireless charging pads by allowing the hardware to adapt to different charging needs.

In the filing’s own words

An example device includes a plurality of capacitor and wireless charging coil series pairs that are collectively in parallel; and one or both of: a driver circuit configured to drive the plurality of capacitor and wireless charging coil series pairs with a first common signal; or a sink circuit configured to receive a second common signal from the plurality of capacitor and wireless charging coil series pairs.

What exactly they claim (claim 1)

1. A wireless charging device comprising: a plurality of capacitor and wireless charging coil series pairs that are collectively in parallel between a first node and a second node; one or more supplemental resonant banks that each include capacitors switchably in parallel with capacitors of the plurality of capacitor and wireless charging coil series pairs; and one or both of: a driver circuit configured to output a first common signal across the first node and the second node; or a sink circuit configured to receive a second common signal across the first node and the second node.

Facts

Company: Google (Google LLC)
Official title: WIRELESS CHARGING WITH SPLIT RESONANT CAPACITORS
Publication number: US20260280347A1
Application number: 19077318
Filed: Mar 12, 2025
Published: Sep 17, 2026
Inventors: 5
Claims: 16

Classified under

H02J 50/12 Electricity & electronicsH02J 50/402 Electricity & electronicsH01F 27/2823 Electricity & electronics

Read the full filing (official PDF) ↗ Open in the Patent Tracker

More from Google in Batteries & energy

Google patents grid software that adjusts power plans based on forecast errors Sep 8, 2026
Google patents method to detect home solar panels on power grid Oct 6, 2026
Google patents inverters that predict power grid faults Oct 1, 2026
Google patents method to save battery by matching modem speed to app needs Oct 8, 2026
Google patents method to tell phones when to save battery after data download Oct 8, 2026

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.