| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of safely transporting a lithium secondary cell that suppresses maximum rising temperature of the cell to prevent a disaster in case that the temperature of the cell is raised by accident during transportation of the cell. SOLUTION: The lithium secondary cell comprises an electrode body 1, of which positive or negative plates 2, 3, are wound or laminated through a separator 4 and uses non-aqueous electrolyte. When energy per unit mass accumulated in the cell is E (J/g), specific heat is Cp (J/ deg.C.g), normal transporting temperature is T1 ( deg.C), maximum rising temperature is T2 ( deg.C), and minimum temperature of the cell that brings about unsafe state of the cell by heating is t ( deg.C), the cell is transported in state that satisfies a relation of E/Cp+T1=T2<t. |
