Kabushiki Kaisha Toshiba

Masaru Harashima

Shigeru Sekine

Shizuo Morioka

Masahiko Kasashima

Hisao Tsukazawa

Yoshiaki Ukiya

Nobuyuki Hosoya

Masayasu Tanaka

Akihiko Uchida

Hirohito Motomiya

Keiichi Mitsui

Masanori Morita

Naoki Tashiro

Hironori Ito

Katsuo Ozawa

Masahiko Hagiwara

Yuichiro Hino

Naoki Isooka

Satoru Yasui

Minoru Takizawa

Norihiro Ishii

Kiyokazu Ishizaki

Takahiro Sugai

Ichioh Murakami

Koji Tada

Syuji Hiramoto

According to one embodiment, a storage device includes a housing, a circuit board, and a module. The circuit board is located in the housing, and includes a first surface and a second surface located opposite the first surface. The module is provided on at least one of the first surface and the second surface of the circuit board. The circuit board is provided with a first notch and a connection portion to be connected to the housing at the periphery. The first notch is provided with a second notch extending toward an area between the connection portion and a module fixation area where the module is fixed on the circuit board.

Storage device, electronic device, and circuit board assembly

According to one embodiment, an electronic apparatus includes a housing, a printed wiring board accommodated in the housing, and a circuit component electrically connected to the printed wiring board, the circuit component including an outer peripheral surface. The printed wiring board includes an outer peripheral edge, at least a pair of edge portions extending in mutually crossing directions, the pair of edge portions being opposed to the outer peripheral surface of the circuit component and being located inside the outer peripheral edge, and a projection portion located between the pair of edge portions and projecting toward the circuit component.

Electronic apparatus

A battery charge circuit using a constant voltage/constant current to power charge a plurality of battery packs, a current detection circuit to detect a charge current according to a predetermined value, and control mechanisms to maintain a constant voltage charge mode when the charge current value drops below a set value within the battery pack.

Battery set structure and charge/discharge control apparatus for

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.

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.

Growing community of inventors

Tokyo, Japan

Masaru Harashima