リチウムイオン二次電池 - ソニー株式会社

Title:

リチウムイオン二次電池

Document Type and Number:

Japanese Patent JP3552361

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To prevent the influence by the internal short-circuit of a large capacity lithium ion secondary battery from being extended to between adjacent positive and negative electrodes, prevent the direct short-circuit of the positive electrode and the negative electrode, and suppress the damage of the battery itself and the influence on the circumference by the extension of the internal short-circuit to a minimum. SOLUTION: In a lithium ion secondary battery formed by laminating a sheet positive electrode 2 having a positive electrode active material 4 applied to one side or both sides of a positive electrode current collector 5 and a sheet negative electrode 3 having a negative electrode active material 6 applied to one side or both sides of a negative electrode current collector 7 through a separator, a critical surface where the positive electrode 2 is never opposed to the negative electrode 3 is provided. A heat resisting layer formed by frame- spraying a powder of metal oxide, metal nitride or the like is provided on at least one side of the critical surface 20a.

Inventors:

Nobuhiro Fujiwara
Yasuo Yukita
Yukio Noda
Kazuya Kojima

Application Number:

JP24992695A

Publication Date:

August 11, 2004

Filing Date:

September 27, 1995

Export Citation:

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