Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.
Battery set structure and charge/discharge control apparatus for lithium-ion battery
 In a battery-driven portable computer, a battery pack is constituted by m battery sets connected in series each including n lithium-ion secondary battery cells connected in parallel. A voltage monitor for monitoring the voltage of the terminal electrode of each battery set and a charger for independently appropriately charging each battery set in accordance with a monitor result are arranged, thereby realizing battery driving by a lithium-ion secondary battery pack having a large capacity. A computer system monitors the voltages of the battery cells which are part of a secondary battery by comparing the battery voltages with a predetermined voltage value in order to detect overdischarge (undervoltage) or overcharge (overvoltage), outputs this information outside of the battery pack, and terminates processing prior to a circuit disconnect. 
Kabushiki Kaisha Toshiba
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Shizuo Masahiko Masanori Masayasu Naoki Masahiko Akihiko Katsuo Keiichi Nobuyuki Masaru Hirohito Naoki Hisao Shigeru Yoshiaki Yuichiro Hironori
Morioka Hagiwara Morita Tanaka Tashiro Kasashima Uchida Ozawa Mitsui Hosoya Harashima Motomiya Isooka Tsukazawa Sekine Ukiya Hino Ito