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1. (WO2010119497) SEALED BATTERY AND MANUFACTURING METHOD THEREOF, AND VEHICLES AND MACHINERY IN WHICH THE SAME IS INSTALLED

Pub. No.:    WO/2010/119497    International Application No.:    PCT/JP2009/057441
Publication Date: Fri Oct 22 01:59:59 CEST 2010 International Filing Date: Tue Apr 14 01:59:59 CEST 2009
IPC: H01M 2/36
Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA
トヨタ自動車株式会社
SUZUKI, Satoshi
鈴木 哲
ITO, Katsumi
伊藤 勝巳
Inventors: SUZUKI, Satoshi
鈴木 哲
ITO, Katsumi
伊藤 勝巳
Title: SEALED BATTERY AND MANUFACTURING METHOD THEREOF, AND VEHICLES AND MACHINERY IN WHICH THE SAME IS INSTALLED
Abstract:
The sealed battery has a battery container (4, 5) and a power generating element sealed inside the battery container. The battery container is provided with a fill opening (12), an annular ridge (16), which extends around the entire circumference of the surface (face) surrounding the fill opening, and an annular indentation (15) on the inside of the inner wall surface of the annular ridge, and has a sealing plug (8), which fits into the annular indentation and covers the fill opening. The sealing plug is joined by being welded to the inner wall surface of the annular ridge around the entire circumference at the edge thereof. Since heat is not readily transferred from the inside to the outside of the outer wall surface of the annular ridge, the effective thermal capacity during welding is mostly determined by the structure of the area on the inside from the outer wall surface of the annular ridge. Consequently, the effective thermal capacity is nearly uniform independent of direction. Thus, it is possible to provide a sealed battery, a manufacturing method thereof, and vehicles and machinery in which the same is installed, wherein the opening can be closed under consistent welding conditions around the entire circumference.