Electric storage device and method for manufacturing the same
AssigneeMurata Manufacturing Co., Ltd.
InventorYUJI KIMURA
Life of this patent
Estimating the term…
Abstract
A miniaturized electric storage device having a first case piece and a second case piece joined by welding over the entire periphery at an overlapping portion of a first side wall portion and a second side wall portion. Of the welded portions formed on the side surfaces of the case, the width of the welded portion formed on the corner portions of the case is smaller than the width of the welded portion formed on the side surfaces of the case.
Claims13
An electric storage device comprising:
- a case defining an interior space and having a first corner portion with a rounded shape in a plane view thereof, the case including:
- a first case piece having a first wall portion, and a first side wall portion extending from an entire periphery of the first wall portion, and
- a second case piece having a second wall portion, and a second side wall portion extending from an entire periphery of the second wall portion, the second side wall portion overlapping with the first side wall portion;
- an electric storage device main body disposed in the interior space of the case;
- and
- a weld extending over an entire periphery of the case in a portion thereof where the first side wall portion and the second side wall portion are overlapped with each other so as to weld the first case piece to the second case piece, wherein, a first width of a first welded portion on the first corner portion of the case is narrower than a second width of a second welded portion on a first side surface of the case.
A method for manufacturing an electric storage device that includes a case having a first corner portion with a rounded shape in a plane view thereof and an electric storage device main body disposed inside the case, the method comprising:
- disposing a first case piece including a first wall portion and a first side wall portion extending from an entire periphery of the first wall portion and a second case piece including a second wall portion and a second side wall portion extending from an entire periphery of the second wall portion so that the first side wall portion and the second side wall portion overlap each other;
- laser-welding an overlapping portion of the first side wall portion and the second side wall portion over an entire periphery of the case so that a first width of a first welded portion formed on the first corner portion of the case is smaller than a second width of a second welded portion formed on a side surface of the case.
Dependencies are inferred from the claim text.