Electro-chemical device and method for manufacturing the same
AssigneeTDK Corporation
InventorsNaoto TSUKAMOTO, Hidetake ITOH, Yoshihiko OHASHI
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Abstract
An electro-chemical device comprises a package including a metal film, a battery element sealed within the package, resin layers disposed at least on the inside of a seal part of the package, and a lead extending from the battery element to the outside of the package through between the resin layers at the seal part of the package. The lead has a special form into which the resin of the resin layers bites, so that the lead is firmly buried in the resin layers, whereby the lead is fully inhibited from moving. Therefore, an electro-chemical device having a high quality can be obtained.
Claims18
An electro-chemical device comprising:
- a package including a metal film;
- a battery element sealed within the package;
- resin layers disposed at least on the inside of a seal part of the package;
- and
- a lead extending from the battery element to the outside of the package through between the resin layers at the seal part of the package;
- wherein the length L1 of a line segment connecting one end of an arc in one direction of a curved surface of the lead and a point extending from the one end and coming into contact with the lead, the maximum value L2 of the shortest distance from the line segment to the curved surface of the lead, the thickness Z1 of the lead, the total thickness Z2 of the resin layers, and the curvature ratio R of the lead satisfy the relationship of;
- 30%≦Z1/Z2≦60%,
- R L2/L2, and
- O<R≦2%.
An electro-chemical device comprising:
- a battery element sealed within a package;
- resin layers disposed at least on the inside of a seal part of the package;
- and
- a plurality of leads extending from the battery element to the outside of the package through between the resin layers at the seal part of the package;
- wherein each of the leads has a plurality of cutouts separated from each other along a longitudinal direction thereof at the seal part.
An electro-chemical device comprising:
- a battery element sealed within a package;
- resin layers disposed at least on the inside of a seal part of the package;
- and
- a plurality of leads extending from the battery element to the outside of the package through between the resin layers at the seal part of the package;
- wherein each of the leads has a plurality of thinned parts partly thinned by pressing in a thickness direction thereof at the seal part.
An electro-chemical device comprising:
- a battery element sealed within a package;
- resin layers disposed at least on the inside of a seal part of the package;
- and
- a plurality of leads extending from the battery element to the outside of the package through between the resin layers at the seal part of the package;
- wherein each of the leads has a band-like thinned part thinned by pressing the lead transversely along a width direction thereof at the seal part and a cutout provided with the thinned part.
An electro-chemical device comprising:
- a battery element sealed within a package;
- resin layers disposed at least on the inside of a seal part of the package;
- and
- a plurality of leads extending from the battery element to the outside of the package through between the resin layers at the seal part of the package;
- wherein each of the leads has a cutout located at the seal part;
- and
- wherein the cutout on each of side faces in a width direction of the lead has an opening size in a longitudinal direction of the lead smaller than that of the cutout in the longitudinal direction of the lead at a position inside of the side faces in the width direction of the lead.
An electro-chemical device comprising:
- a battery element sealed within a package;
- resin layers disposed at least on the inside of a seal part of the package;
- and
- a plurality of leads extending from the battery element to the outside of the package through between the resin layers at the seal part of the package;
- wherein each of the leads has a groove on a main surface thereof at the seal part, the groove extending in a direction tilted with respect to a width direction of the lead.
Dependencies are inferred from the claim text.