Koki Holdings Co., Ltd.

Yusuke Funabiki

Tomomasa Nishikawa

Takuya Teranishi

Masayuki Ogura

Kazuhiko Funabashi

Hiroyuki Hanawa

Shinji Watanabe

Toshio Mizoguchi

Junichi Toukairin

Yasushi Nakano

Takuhiro Murakami

Shota Kanno

Shota Takeuchi

Hikaru Tamura

Junpei Sato

Nobuhiro Takano

Akira Matsushita

Hayato Yamaguchi

Osamu Kawanobe

Masaru Hirano

Naoto Wakatabe

The electrical apparatus, in which a series connection state and a parallel connection state of an upper cell unit including five battery cells and a lower cell unit can be automatically switched by means of a difference in a terminal shape on the electrical apparatus body side, has a terminal holder and holds apparatus side terminals. The terminal holder, which establishes an electrically connected state with the connection terminals of the battery pack, is provided with two parallel protruding parts that extend in the forward-backward direction, and second rail grooves fitted to the protruding parts on the electrical apparatus side. Due to the fitting, relative movement of the terminal holder and the battery pack in the vertical direction can be suppressed, and wear on the apparatus side terminals can be greatly suppressed.

Electrical apparatus using battery pack

A battery pack houses first and second cell units that are composed of a plurality of cells, and has a positive electrode power source terminal and a negative electrode power source terminal. This battery pack is provided with a series connector capable of connecting, in series, the first and second cell units and a parallel connector capable of connecting, in parallel, the first and second cell units, and is capable of switching between a parallel connection voltage and a series connection voltage. In the case of attachment to the high voltage electrical device body, the series connector becomes conductive and the parallel connector pair is cut off by the action of the series/parallel switching terminal. In the case of attachment to a low voltage electrical device body, the state is returned to an initial state, the series connector is cut off, and the parallel connector pair becomes conductive.

Battery pack, electrical device using battery pack, and electrical device system

The electrical device comprises a common device main body having selectively and detachably attached thereto either a variable-voltage power supply device or a high-voltage power supply device. The device main body has: a protruding section that abuts a power supply-side main erroneous attachment prevention section provided in the variable-voltage power supply device and the high-voltage power supply device; a device-side main erroneous attachment prevention section that abuts the power supply-side main erroneous attachment prevention section provided in a low-voltage power supply device and prevents the low-voltage power supply device from abutting an attachment positioning section; and a device-side attachment permitting section that can be combined in a power supply-side auxiliary erroneous attachment prevention section provided in the high-voltage power supply device.

Electrical device system, electrical device, and power supply device

In an upper cell unit () and a lower cell unit () comprising five battery cells, positive electrode terminals () are set apart and aligned vertically, and negative electrode terminals () are set apart and aligned vertically. When an electrical device body is rated at 36V, device-side terminals are in contact only at the upper terminals (), and short circuiting of the lower terminals () is effected using a short bar. When the electrical device body is rated at 18V, the upper and lower terminals (andand) are simultaneously made to contact the device-side terminals, and the upper cell unit () and the lower cell unit () assume a parallel connected state. Thus, it is possible to automatically switch the output voltage when a battery pack is mounted according to the difference in terminal shape on the electrical device body side.

Growing community of inventors

Ibaraki, Japan

Yusuke Funabiki