| 摘要 |
According to an embodiment, a battery module including two nonaqueous electrolyte batteries electrically connected in series is provided. Each of the nonaqueous electrolyte batteries includes a positive electrode, a negative electrode, and a nonaqueous electrolyte. The positive electrode contains an iron-containing phosphorus compound represented by Li_xFe_1−yMn_yA_zPO_4 and having an olivine structure, wherein A is at least one element selected from the group consisting of V, Mg, Ni, Al, Sn, Zr, and Nb, and 0 <= x <= 1.1, 0 <= y <= 0.2 and 0 <= z <= 0.2 are set. The negative electrode contains a titanium-containing oxide. The battery module has a charge maximum voltage in a range of 4 to 5 V. |
