US 12,489,316 B2
Wireless charging device
Benze Zou, Shanghai (CN); and Shengyi Yang, Shanghai (CN)
Assigned to Delta Electronics (Shanghai) Co., Ltd., Shanghai (CN)
Filed by Delta Electronics (Shanghai) Co., Ltd., Shanghai (CN)
Filed on Jul. 1, 2022, as Appl. No. 17/856,797.
Claims priority of application No. 202111031659.X (CN), filed on Sep. 3, 2021.
Prior Publication US 2023/0074957 A1, Mar. 9, 2023
Int. Cl. H02J 50/10 (2016.01); H02J 7/00 (2006.01); H02J 50/00 (2016.01); H05K 7/20 (2006.01)
CPC H02J 50/10 (2016.02) [H02J 7/0044 (2013.01); H02J 50/005 (2020.01); H05K 7/20172 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A wireless charging device for wirelessly charging a mobile device, wherein the mobile device comprises a receiver coil, and the wireless charging device comprises:
a casing comprising a top plate, a bottom plate, a plurality of lateral walls, a partition plate, a supporting wall and an accommodation space, wherein the top plate and the bottom plate are opposite to each other, the top plate comprises an upper surface, a lower surface, a plurality of protrusion portions and a plurality of holes, the upper surface and the lower surface of the top plate are opposite to each other, the plurality of protrusion portions are extended from the upper surface of the top plate faced away the bottom plate, and the mobile device is disposed on the top plate through the plurality of protrusion portions, so as to form a first gap between the top plate and the mobile device, and the plurality of holes run through the top plate, the partition plate and the supporting wall are disposed between the top plate and the bottom plate, respectively, the supporting wall is directly and perpendicularly connected to the partition plate and the bottom plate, and a second gap is formed between the supporting wall and the top plate, wherein the accommodation space is divided into a first accommodation space, a second accommodation space and a third accommodation space through the partition plate and the supporting wall, the first accommodation space is located between the top plate and the partition plate, the second accommodation space is located between the partition plate and the bottom plate, and the supporting wall is located between the first accommodation space and the third accommodation space;
a transmitter driving board disposed in the second accommodation space for receiving and converting an external electric energy into a driving electric energy during an operation of the wireless charging device;
a transmitter coil assembly disposed in the first accommodation space and electromagnetically coupled with the receiver coil, wherein the transmitter coil assembly receives the driving electric energy from the transmitter driving board and transfers the driving electric energy to the receiver coil during the operation of the wireless charging device, so that the mobile device is wirelessly charged by the driving electric energy, wherein a third gap is formed between the transmitter coil assembly and the top plate, and a first airflow channel is formed by the first gap, the plurality of holes, the third gap, the second gap and the third accommodation space collaboratively, so that an airflow is allowed to flow through the first airflow channel; and
a fan comprising an inlet and an outlet, wherein the inlet is disposed adjacent to the third accommodation space, the outlet is disposed adjacent to the bottom plate, and the airflow flowing through the first airflow channel is inhaled to the fan through the inlet and discharged out through the outlet.