Non-aqueous electrolyte battery, and power supply unit

Abstract

A non-aqueous electrolyte battery has a positive electrode, a negative electrode, and a non-aqueous electrolyte. The positive electrode has a high-capacity positive electrode portion with a plate area per capacity of smaller than 200 cm2/Ah, and a high-power positive electrode portion with a plate area per capacity of 200 cm2/Ah or larger. The non-aqueous electrolyte battery is advantageous in providing a battery, with use of a single kind of non-aqueous electrolyte battery, which simultaneously satisfies the requirements on high-capacity characteristics capable of performing a long-term continuous discharge, and on high-power characteristics capable of performing a pulse discharge at a large current, without using a hybrid power supply unit which has multiple kinds of batteries and requires a complex control system.

Description

Claims

1. A non-aqueous electrolyte battery comprising a positive electrode, a negative electrode, and a non-aqueous electrolyte, wherein the positive electrode includes a high-capacity positive electrode portion with a plate area per capacity of smaller than 200 cm2/Ah, and a high-power positive electrode portion with a plate area per capacity of 200 cm2/Ah or larger.

2. The non-aqueous electrolyte battery according to claim 1, wherein the non-aqueous electrolyte battery has an electrode assembly of a wound structure formed by winding the positive electrode and the negative electrode one over the other, andthe high-capacity positive electrode portion is arranged at an inner position of the electrode assembly than the high-power positive electrode portion.

3. A power supply unit comprising the non-aqueous electrolyte battery according to claim 1, wherein the multiple non-aqueous electrolyte batteries are connected in series.

4. A power supply unit comprising the non-aqueous electrolyte battery according to claim 2, wherein the multiple non-aqueous electrolyte batteries are connected in series.