Lithium secondary battery and transportation method thereof
AssigneeNGK Insulators, Ltd.
InventorHiroshi Nemoto
Life of this patent
Estimating the term…
Abstract
A method of transporting a lithium secondary battery includes transporting the battery including an electrode body obtained by winding or laminating a positive electrode and a negative electrode via a separator, and a non-aqueous electrolyte solution in a state where: E/Cp+T3<t . . . (1) where E (J/g) is energy quantity per unit weight of said battery; Cp (J/° C.·g) is the specific heat of said battery; T3 (° C.) is a normal transportation temperature of said battery; and t(° C.) is the lowest temperature at which said battery falls into an unsafe state.
Claims12
A lithium secondary battery comprising:
- an electrode body obtained by winding or laminating a positive electrode and a negative electrode via a separator, and
- a non-aqueous electrolyte solution, wherein said battery satisfies the following Equation (1):
- E0/Cp+T1=T2<t (1)
- where E0 (J/g) is energy quantity per unit weight at the time of full charging of said battery;
- Cp (J/° C.·g) is the specific heat of said battery;
- T1 (° C.) is a normal use temperature of said battery;
- T2 (° C.) is the highest elevated temperature of said battery;
- and t (° C.) is the lowest temperature at which said battery falls into an unsafe state.
A method of transporting a lithium secondary battery comprising an electrode body obtained by winding or laminating a positive electrode and a negative electrode via a separator, and a non-aqueous electrolyte solution, wherein said battery is transported in a state where the following Equation (2) is satisfied:
- E/Cp+T3=T2<t (2)
- wherein E (J/g) is accumulated energy quantity per unit weight of said battery;
- Cp (J/° C.·g) is the specific heat of said battery;
- T3 (° C.) is a normal transportation temperature of said battery;
- T2 (° C.) is the highest elevated temperature of said battery;
- and t (° C.) is the lowest temperature at which said battery falls into an unsafe state.
Dependencies are inferred from the claim text.