PROCESS FOR PRODUCTION OF LITHIUM ION SECONDARY BATTERY

摘要

The method for producing a lithium ion secondary battery includes: selecting a positive electrode sheet, negative electrode sheet, and separator sheet; constructing an electrode assembly by superimposing the selected sheets; and housing the above electrode assembly in a battery case along with an electrolyte solution. In the method, at least one of the sheets is selected such that it satisfies the relationship 0.8 < a/b < 1.5 where a and b represent the slopes of straight lines respectively that are determined in tests under the respective conditions of (1) a high-rate loading-unloading cycle and (2) a low-rate loading-unloading cycle.