SECONDARY BATTERY

摘要

A secondary battery includes a high-capacity electrode portion, a high-power electrode portion, an electrolyte and a battery case. The high-capacity electrode portion includes a first positive electrode plate, a first negative electrode plate opposite to the first positive electrode plate, and a separator between the first positive electrode plate and the first negative electrode plate. The high-power electrode portion includes a second positive electrode plate, a second negative electrode plate opposite to the second positive electrode plate, and a separator between the second positive electrode plate and the second negative electrode plate. The electrolyte contacts the high-capacity electrode portion and the high-power electrode portion. The battery case accommodates the high-capacity electrode portion, the high-power electrode portion and the electrolyte therein. In the secondary battery, the power density of the high-power electrode portion is at least four times greater than that of the high-capacity electrode portion.

主权项

1. A secondary battery, comprising:
a high-capacity electrode portion including:
a first positive electrode plate including a first positive electrode substrate and a first positive electrode active material coating portion on which a first positive electrode active material is coated on the first positive electrode substrate;a first negative electrode plate, opposite the first positive electrode plate, the first negative electrode plate including a first negative electrode substrate and a first negative electrode active material coating portion on which a first negative electrode active material is coated on the first negative electrode base material; anda first separator between the first positive electrode plate and the first negative electrode plate; and a high-power electrode portion including:
a second positive electrode plate including a second positive electrode base material and a second positive electrode active material coating portion on which a second positive electrode active material is coated on the second positive electrode base material;a second negative electrode plate, opposite the second positive electrode plate, the second negative electrode plate including a second negative electrode base material and a second negative electrode active material coating portion on which a second negative electrode active material is coated on the second negative electrode base material; anda second separator between the second positive electrode plate and the second negative electrode plate, wherein a first volume of the active electrode material in the first portion is greater than a second volume of active electrode material in the second portion and wherein a power density of high power electrode portion is at least four times greater than that of high capacity electrode portion.