| 摘要 |
A secondary battery (10) includes, accommodated in a battery case, a high-capacity electrode portion (S), a high-power electrode portion (T), and an electrolyte. The high-capacity electrode portion (S) includes a first positive electrode plate(110a), a first negative electrode plate (120a) opposite to the first positive electrode plate (110a), and a first separator portion (130) interposed between the first positive electrode plate (110a) and the first negative electrode plate (120a). The high-power electrode portion (T) includes a second positive electrode plate (110b), a second negative electrode plate (120b) opposite to the second positive electrode plate (110b), and a second separator portion (130) interposed between the second positive electrode plate (110b) and the second negative electrode plate (120b). In the secondary battery, the volume of a second positive electrode active material coating portion (112) coated on the second positive electrode plate (110b) is 2 vol% to 20 vol% of that of a first positive electrode active material coating portion (112) coated on the first positive electrode plate (110a) and said second positive electrode active material coating portion (114). |
