US 12,334,747 B2
Wireless charging reception circuit, method, electronic device and wireless charging system for transmitting electric energy through electromagentic induction to charge a battery
Kaiqi Wu, Beijing (CN)
Assigned to Beijing Xiaomi Mobile Software Co., Ltd., Beijing (CN)
Filed by Beijing Xiaomi Mobile Software Co., Ltd., Beijing (CN)
Filed on Jan. 28, 2022, as Appl. No. 17/587,692.
Claims priority of application No. 202110833062.0 (CN), filed on Jul. 22, 2021.
Prior Publication US 2023/0023680 A1, Jan. 26, 2023
Int. Cl. H02J 50/12 (2016.01); H02J 7/00 (2006.01); H02J 50/40 (2016.01); H02M 7/219 (2006.01)
CPC H02J 50/12 (2016.02) [H02J 7/00712 (2020.01); H02J 50/402 (2020.01); H02M 7/219 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A wireless charging reception circuit comprises: a first resonance circuit, a second resonance circuit, a rectifying circuit and a control circuit;
the first resonance circuit is connected with the rectifying circuit, and the first resonance circuit receives an electric signal transmitted by a primary resonance circuit through an electromagnetic induction mode and output the received electric signal to the rectifying circuit;
the second resonance circuit is connected with the rectifying circuit, and the second resonance circuit receives an electric signal transmitted by the primary resonance circuit through an electromagnetic induction mode and output the received electric signal to the rectifying circuit; and
the rectifying circuit, connected with the control circuit and a battery, comprises a first semiconductor device, a second semiconductor device, a third semiconductor device, a fourth semiconductor device, and the rectifying circuit rectifies the electric signal transmitted by the first resonance circuit and/or the electric signal transmitted by the second resonance circuit based on control of the control circuit and charge the battery based on a rectified electric signal,
wherein the first semiconductor device to the fourth semiconductor device constitute a rectifier bridge,
wherein a first input end of the rectifier bridge is connected with a first output end of the first resonance circuit, a second input end of the rectifier bridge is connected with a second output end of the first resonance circuit and a first output end of the second resonance circuit, and
wherein a first output end of the rectifier bridge is connected with a positive electrode of the battery, and a second output end of the rectifier bridge is connected with a negative electrode of the battery.