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本文提出了一种用于双电池智能手机的可重构串并联充电器，在直接充电模式下实现了89W功率和97.7%的效率，解决了串联充电时系统供电需要额外转换器的问题。
foldable phones, the number of smart phones that use two batteries are gradually increasing [1]. In ultra-fast charging applications, two batteries are connected in series as shown in Fig. 30.3.1. The output voltage of the adapter is varied according to the battery voltage using communication between the adapter and smartphone to control the battery charging current. By connecting the batteries in series, twice the charging power can be obtained with the same current. However, since the battery output voltage is high, a separate converter must be always working to supply the system power. Furthermore, the loss of the converter reduces the usable battery capacity. Also, there is a disadvantage in that a buck-boost switching charger [2,3] is required to support a general adapter whose output voltage is not
Sungwoo Lee, Taejin Jeong, Yonghwan Cho, Jeongdu Yoo, Sungkyu Cho,
Minkyu Kwon, Daewoong Cho, Sang Hee Kang, Jung Wook Heo, Hyoung-Seok Oh, Sung Ung Kwak Samsung Electronics, Hwaseong, Korea With the advent of ultra-fast charging and