Title:
電動工具用装置
Document Type and Number:
Japanese Patent JP5554622
Kind Code:
B2
Abstract:
An internal temperature estimation unit, which reads a detected temperature of a cell of a battery for an electric power tool to estimate an internal temperature of the battery based on the detected temperature, includes: an initial-value setting device which reads, when a discharge/charge of the battery is started, the detected temperature and sets the detected temperature as an initial value; and a temperature increase amount calculation device which calculates a temperature increase amount of the cell of the battery based on a latest value of the detected temperature and the initial value set by the initial-value setting device; the internal temperature estimation unit outputs the temperature increase amount as an estimated value representing the internal temperature of the battery.
Inventors:
Masashi Noda
Toshikazu Okabayashi
Tadahiko Kobayagawa
Toshikazu Okabayashi
Tadahiko Kobayagawa
Application Number:
JP2010098322A
Publication Date:
July 23, 2014
Filing Date:
April 21, 2010
Export Citation:
Assignee:
Makita Corp.
International Classes:
H02H6/00; B25F5/00; G01K3/08; G01R31/36; H01M10/44; H01M10/48; H02J7/00; H02J7/04
Attorney, Agent or Firm:
Nagoya international patent business corporation
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