The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 09, 2000
Filed:
Feb. 25, 1999
Hironori Ito, Tokyo, JP;
Shigeru Sekine, Tokyo, JP;
Masahiko Kasashima, Tokyo, JP;
Hisao Tsukazawa, Tokyo, JP;
Yuichiro Hino, Tokyo, JP;
Shizuo Morioka, Hanno, JP;
Nobuyuki Hosoya, Tokyo, JP;
Yoshiaki Ukiya, Tokyo, JP;
Katsuo Ozawa, Tokyo, JP;
Hirohito Motomiya, Kawagoe, JP;
Masaru Harashima, Tokyo, JP;
Masahiko Hagiwara, Tokyo, JP;
Masanori Morita, Sayama, JP;
Akihiko Uchida, Tokyo, JP;
Naoki Tashiro, Tokyo, JP;
Masayasu Tanaka, Tokyo, JP;
Keiichi Mitsui, Tokyo, JP;
Naoki Isooka, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
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.