| 摘要 |
PURPOSE:To improve heavy-load characteristics, charge and discharge cycle characteristics, storage characteristics, and impact resistance by providing a recessed part of a negative electrode pellet of a coin-shaped nonaqueous electrolyte secondary battery on the facing side to a negative electrode can, and disposing metal lithium in the recessed part. CONSTITUTION:In a coin-shaped nonaqueous electrolyte secondary battery provided with a positive electrode, a negative electrode pellet 2 including carbon material capable of storing and discharging lithium, metal lithium to supply lithium to the negative electrode pellet 2, a negative electrode can 6 having a collector on an inner surface, a separator, and nonaqueous electrolyte, a recessed part 2A is provided in the negative electrode pellet 2 on the facing side to the negative electrode can, and metal lithium is disposed in this recessed part 2A. In this secondary battery, in addition to the recessed part 2A in the negative electrode pellet 2, metal lithium 4 may also be disposed between the negative electrode pellet 2 and the negative electrode can 6, in which case the thickness of the metal lithium disposed between the negative electrode pellet 2 and the negative electrode can 6 can be thinned because of the metal lithium 4 being disposed in the recessed part 2A. |
