| 摘要 |
A primary object of this invention is to provide a lithium rechargeable battery capable of terminating charging before a safety valve is actuated by a sudden rise in potential immediately after the start of overcharge. The above object can be attained by a lithium rechargeable battery comprising positive electrode comprising a phosphoric acid compound having an olivine structure as a positive electrode active material, a negative electrode, a separator held by these positive and negative electrodes, an electrolyte prepared by dissolving a supporting salt, and a safety valve having an opening pressure in the range of 25 kgf/cm2 to 30 kgf/cm2. The lithium rechargeable battery is characterized in that the initial amount of lithium contained in the above electrolyte is in the range of 5 to 20 when the initial amount of lithium contained in the above positive electrode is presumed to be 100. |
