POWER SUPPLY UNIT AND MANUFACTURING METHOD OF THE SAME

POWER SUPPLY UNIT AND MANUFACTURING METHOD OF THE SAME

PROBLEM TO BE SOLVED: To provide a sealed battery requiring a lid body with a thickness of 0.3 mm or more, which exhibits an excellent operating pressure accuracy of a valve and comprises a safety device having a structure that can be manufactured with high productivity.SOLUTION: A safety valve part...

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Hauptverfasser: KANEDA YOSHIO, HAMADA HIDEAKI
Format: Patent
Sprache:eng
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BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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creator KANEDA YOSHIO
HAMADA HIDEAKI
description PROBLEM TO BE SOLVED: To provide a sealed battery requiring a lid body with a thickness of 0.3 mm or more, which exhibits an excellent operating pressure accuracy of a valve and comprises a safety device having a structure that can be manufactured with high productivity.SOLUTION: A safety valve part 206 is provided on a part of a lid body 202. The safety valve part 206 consists of a valve part 207 and a cleavage part 208 surrounding it, and the cleavage part 208 is extended from the lid body 202 toward the outside of a cell with its thickness made thinner than the thickness of the lid body to be connected to the valve part 207. By employing a structure that, when the internal pressure of the cell rises, allows the tensile stress to be concentrated on a thinnest part 209 of the cleavage part 208 so as to break the cleavage part, work hardening of the material of the cleavage part is decreased and a stable valve operating pressure is ensured, and the safety valve part can be easily manufactured by a press machine.
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subjects BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
title POWER SUPPLY UNIT AND MANUFACTURING METHOD OF THE SAME
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