US 2019/0097186 A1Published application

Electrochemical element

AssigneeMaxell Holdings, Ltd.

InventorsYuki TAKEI, Yukihiro HATA, Kiyoharu HOSOYA

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Abstract

[Problem] The present invention provides an electrochemical element having an electrode body covered with a laminate-film jacket; the electrochemical element is structured to prevent damage and short-circuiting of a positive electrode lead while making it possible to prevent decreased sealing ability of the laminate-film jacket. [Solution] A laminate-type cell 1 includes: an electrode body 10; a positive terminal 41; a laminate-film jacket 20; a positive electrode sealing material 45 located between the positive terminal 41 and the laminate-film jacket 20; and an insulating material 55. The positive terminal 41 and the positive electrode sealing material 45 include a plurality of bending portions 51a, 51b inside the laminate-film jacket 20. The insulating material 55 coats a part of the positive electrode sealing material 45 near the electrode body 10. The positive electrode sealing material 45 includes a positive-electrode insulated portion 51c coated with the insulating material 55 and a positive-electrode welded portion 51d pinched by the laminate-film jacket 20.

Claims15

Dependent claims

An electrochemical element comprising:

an electrode body including a positive electrode, a negative electrode, and a separator;
a positive terminal connected to the positive electrode and extending outward from the electrode body;
a negative terminal connected to the negative electrode and extending outward from the electrode body;
a sheet-like laminate-film jacket having a welded portion at the peripheral portion, the jacket coating the electrode body and pinching the positive terminal and the negative terminal;
a sealing material located between the positive terminal and the laminate-film jacket and between the negative terminal and the laminate-film jacket at the welded portion;
and
an insulating material having an electrically insulating property, and coating the positive terminal and the negative terminal, wherein
the positive terminal and the sealing material include a plurality of bending portions inside the laminate-film jacket;
the insulating material coats a part of the sealing material near the electrode body;
and
the sealing material includes an insulating material coated portion coated with the insulating material and a laminate-film jacket welded portion pinched by the laminate-film jacket at the welded portion of the laminate-film jacket.

8 more elements

Dependencies are inferred from the claim text.