Title:
LITHIUM ION SECONDARY BATTERY AND BATTERY SYSTEM
Document Type and Number:
Japanese Patent JP2016110917
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a lithium ion secondary battery which allows even a voltage detector with low accuracy to make a diagnosis about a state of charge.SOLUTION: In a lithium ion secondary battery, at least one of a positive electrode and a negative electrode includes 3 kinds of active materials. The positive electrode active materials included in the positive electrode are selected from a first positive electrode active material of which the average potential is 4 V or higher, a second positive electrode active material of which the average potential is 3.5 to lower than 4 V, and a third positive electrode active material of which the average potential is lower than 3.5 V. The negative electrode active materials included in the negative electrode are selected from a first negative electrode active material of which the average potential is lower than 0.3 V, a second negative electrode active material of which the average potential is 0.3 to lower than 0.6 V, and a third negative electrode active material of which the average potential is 0.6 V or higher.SELECTED DRAWING: Figure 6
Inventors:
SEKI EIJI
KIMURA NAOTAKA
SHIN SEOGCHUL
KIMURA NAOTAKA
SHIN SEOGCHUL
Application Number:
JP2014249253A
Publication Date:
June 20, 2016
Filing Date:
December 09, 2014
Export Citation:
Assignee:
HITACHI LTD
International Classes:
H01M10/052; H01M4/36; H01M4/38; H01M4/48; H01M4/485; H01M4/505; H01M4/525; H01M4/58; H01M4/587; H01M10/44; H01M10/48
Attorney, Agent or Firm:
Fuyuki Nagai