| 摘要 |
PROBLEM TO BE SOLVED: To provide a non-aqueous electrolyte secondary battery for preventing the leakage of non-aqueous electrolyte in case of damage to a rapture board by intense falling, vibration and shock, and restricting the flow of a current in an abnormal case such as an external short circuit and over charge, and further including a PTC element acting as a gas passageway when gas escapes and disperses by the rapture board. SOLUTION: The non-aqueous electrolyte secondary battery comprises an enclosure can 1 having an opening at its one end, a group of electrodes each consisting of a negative electrode 4, a separator 5 and a positive electrode 3, non-aqueous electrolyte stored in the enclosure can, a group of sealing covers 9 for airtightly sealing the opening of the enclosure can via an insulating member, wherein the group of sealing covers are in ring-shaped, and a PTC element 14 having disc-like polymer molecule resin layer arranged to adhere closely to an inner circumference surface of the ring in the space of the ring. COPYRIGHT: (C)2005,JPO&NCIPI |
