SEALED BATTERY
First Claim
1. A sealed battery comprising:
- an electrode body including a positive electrode and a negative electrode;
a case accommodating the electrode body;
a current cut-off valve that prevents gas circulation between an inside and an outside of the case and is deformed when an internal pressure in the case rises above a predetermined level; and
either a positive external terminal or a negative external terminal electrically connected to the electrode body via the current cut-off valve, whereina connecting member is provided that is electrically connected to the electrode body and has an engagement hole formed in a location adjacent to the current cut-off valve,the current cut-off valve is conductively connected to the connecting member by joining linearly to a peripheral edge of the engagement hole and/or joining at a surface that is in contact with an inner wall of the engagement hole in a state in which part of the current cut-off valve is fitted into the engagement hole, andwhen the internal pressure in the case rises above the predetermined level, the current cut-off valve is deformed outward of the case by the internal pressure and the current cut-off valve is separated from the connecting member, thereby breaking the electric connection between the connecting member and the current cut-off valve.
1 Assignment
0 Petitions
Accused Products
Abstract
A sealed battery (10) provided by the present invention includes: a current cut-off valve (22); and a connecting member (30) having an engagement hole (34) formed in a location adjacent to the current cut-off valve. The current cut-off valve is conductively connected to the connecting member by joining linearly to a peripheral edge of the engagement hole and/or joining at a surface that is in contact with an inner wall of the engagement hole in a state in which part of the current cut-off valve is fitted into the engagement hole. When an internal pressure of a battery case (40) rises above a predetermined level, the current cut-off valve is deformed outward of the case by the internal pressure, the current cut-off valve is separated from the connecting member, and the electric connection between the connecting member and the current cut-off valve is broken.
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Citations
11 Claims
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1. A sealed battery comprising:
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an electrode body including a positive electrode and a negative electrode; a case accommodating the electrode body; a current cut-off valve that prevents gas circulation between an inside and an outside of the case and is deformed when an internal pressure in the case rises above a predetermined level; and either a positive external terminal or a negative external terminal electrically connected to the electrode body via the current cut-off valve, wherein a connecting member is provided that is electrically connected to the electrode body and has an engagement hole formed in a location adjacent to the current cut-off valve, the current cut-off valve is conductively connected to the connecting member by joining linearly to a peripheral edge of the engagement hole and/or joining at a surface that is in contact with an inner wall of the engagement hole in a state in which part of the current cut-off valve is fitted into the engagement hole, and when the internal pressure in the case rises above the predetermined level, the current cut-off valve is deformed outward of the case by the internal pressure and the current cut-off valve is separated from the connecting member, thereby breaking the electric connection between the connecting member and the current cut-off valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification