LITHIUM ION SECONDARY BATTERY - MATSUSHITA ELECTRIC IND CO LTD

Title:

LITHIUM ION SECONDARY BATTERY

Document Type and Number:

Japanese Patent JPH10255843

Kind Code:

A

Abstract:

To prevent an abnormal temperature rise of a lithium ion secondary battery when broken.

This secondary battery consists of a positive electrode of composite metal oxide which can occlude and discharge lithium ion, a negative electrode of carbon material which can occlude and discharge lithium ion, a separator and nonaqueous electrolyte. In this case, it is structured so that an average value of the primary particle diameter of composite metal active substance of the positive electrode calculated from a photo taken by a scanning electron microscope is 1.5m, and the stocking strength of the separator is 100-800g. Thereby, a temperature rise of the battery can be presented when broken, and a lithium secondary battery with excellent safety can be obtained.

Inventors:

YUGAWA TORU
MURAI SUKEYUKI
YONEHARA TOMOKICHI
TAKAHASHI YUI

Application Number:

JP5132697A

Publication Date:

September 25, 1998

Filing Date:

March 06, 1997

Export Citation:

Click for automatic bibliography generation Help

Assignee:

MATSUSHITA ELECTRIC IND CO LTD

International Classes:

H01M10/05; H01M2/14; H01M4/505; H01M4/525; H01M10/0525; H01M10/0566; (IPC1-7): H01M10/40; H01M2/14; H01M4/58

Attorney, Agent or Firm:

Tomoyuki Takimoto (1 person outside)

Previous Patent: SOLID ELECTROLYTE AND BATTERY HAVING IT

Next Patent: NONAQUEOUS ELECTROLYTE SECONDARY BATTERY