US 11,929,470 B2
Electric power charge and discharge system
Shuhei Nagatsuka, Atsugi (JP); and Akihiro Kimura, Takamatsu (JP)
Assigned to Semiconductor Energy Laboratory Co., Ltd., Atsugi (JP)
Filed by Semiconductor Energy Laboratory Co., Ltd., Atsugi (JP)
Filed on Mar. 28, 2023, as Appl. No. 18/127,072.
Application 18/127,072 is a continuation of application No. 17/159,214, filed on Jan. 27, 2021, granted, now 11,621,443.
Application 17/159,214 is a continuation of application No. 16/876,082, filed on May 17, 2020, granted, now 10,910,884, issued on Feb. 2, 2021.
Application 16/876,082 is a continuation of application No. 15/822,483, filed on Nov. 27, 2017, granted, now 10,658,877, issued on May 19, 2020.
Application 15/822,483 is a continuation of application No. 14/208,844, filed on Mar. 13, 2014, granted, now 9,831,707, issued on Nov. 28, 2017.
Application 14/208,844 is a continuation of application No. 13/288,316, filed on Nov. 3, 2011, granted, now 8,674,655, issued on Mar. 18, 2014.
Application 13/288,316 is a continuation of application No. 13/032,850, filed on Feb. 23, 2011, granted, now 8,054,037, issued on Nov. 8, 2011.
Application 13/032,850 is a continuation of application No. 12/893,497, filed on Sep. 29, 2010, granted, now 7,898,215, issued on Mar. 1, 2011.
Application 12/893,497 is a continuation of application No. 11/976,376, filed on Oct. 24, 2007, granted, now 7,808,206, issued on Oct. 5, 2010.
Claims priority of application No. 2006-296964 (JP), filed on Oct. 31, 2006.
Prior Publication US 2023/0246255 A1, Aug. 3, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H02J 7/00 (2006.01); H01M 10/44 (2006.01); H02J 50/10 (2016.01); H02J 50/27 (2016.01); H02J 50/40 (2016.01); H04B 1/3883 (2015.01)
CPC H01M 10/44 (2013.01) [H02J 7/00 (2013.01); H02J 50/10 (2016.02); H02J 50/27 (2016.02); H02J 50/402 (2020.01); H04B 1/3883 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An electronic device comprising:
an antenna;
a connector configured to be connected to a wired external power supply;
a first battery;
a second battery;
a power supply switching circuit;
an internal circuit electrically connected to the first battery and the second battery via the power supply switching circuit; and
a charge switching circuit configured to switch an electric power supply to the first battery via the connector into an electric power supply to the first battery via the antenna when the electronic device detects disconnection of an electrical path between the connector and the external power supply,
wherein the electronic device is configured to perform discharging of the second battery to operate the internal circuit and charging the first battery via the antenna at the same time.