US 8,012,614 B2Granted

Non-aqueous electrolyte battery, and power supply unit

AssigneePanasonic Corporation

InventorsTakuya Nakashima, Masatoshi Nagayama, Yoshiyuki Muraoka

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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.

Claims4

Dependent claims

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, wherein:
the high-capacity positive electrode portion contains an amount of a positive electrode active material in a layer on a current collector such that the plate area per capacity is smaller than 200 cm2/Ah,
the high-power positive electrode portion contains an amount of a positive electrode active material in a layer on a current collector such that the plate area per capacity is 200 cm2/Ah or larger, and
a difference in electrode plate area per capacity between the high-capacity positive electrode portion and the high-power positive electrode portion is 100 cm2/Ah or more, 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, and the high-capacity positive electrode portion is arranged at an inner position of the electrode assembly than the high-power positive electrode portion.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 11/653,333Filed 16 Jan 2007
Priority: JP 2006-00736216 Jan 2006
Published: US 2007/0166610 A119 Jul 2007
Granted: 6 Sep 2011
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

H01M 10/0587
Construction or manufacture: of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes…
H01M 4/13
Electrodes composed of, or comprising, active material: electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators;…
H01M 10/0413
Construction or manufacture in general: large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
H01M 10/0525
Li-accumulators: rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries