CORE ROD, COILED TYPE ELECTRODE GROUP FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND METHOD FOR MANUFACTURING THE NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a non-aqueous electrolyte secondary battery including a coiled type electrode group into whose center a core rod is inserted, in which battery reinforcing effect of a battery by the core rod is enhanced, the deformation of the core rod itself and the occurrence of an internal short-circuit are suppressed, and liquid-filling performance of the non-aqueous electrolyte into the battery is improved.

SOLUTION: The core rod 1 is a hollow cylinder with a splitting slit 2 that spirally goes around from one end 4 of the core rod 1 to the other end 5 along a longitudinal direction and a hollow part 3. Use of the coiled type electrode group into whose center the core rod 1 is inserted obtains the non-aqueous electrolyte secondary battery in which energy density is high, the occurrence of the internal short-circuit is suppressed and productivity is superior.

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