SECONDARY BATTERY, BATTERY UNIT, AND BATTERY MODULE

Title:

SECONDARY BATTERY, BATTERY UNIT, AND BATTERY MODULE

Document Type and Number:

Japanese Patent JP2012124146

Kind Code:

A

Abstract:

To provide a secondary battery having large current charge and discharge characteristics, a battery unit and a battery module.

The secondary battery includes a battery element and a packaging material packaging the battery element. The battery element includes: a positive electrode which has a positive electrode current collector and a positive electrode active material layer, and in which the positive electrode active material layer is formed on the positive electrode current collector in such a manner that a positive electrode current collector exposed portion is formed and a width wc of the positive electrode current collector exposed portion and a width Wc of the positive electrode active material layer satisfies the relation of 0.5<(wc/Wc)≤1.0; a negative electrode which has a negative electrode current collector and a negative electrode active material layer, and in which the negative electrode active material layer is formed on the negative electrode current collector in such a manner that a negative electrode current collector exposed portion is formed and a width wa of the negative electrode current collector exposed portion and a width Wa of the negative electrode active material layer satisfies the relation of 0.5<(wa/Wa)≤1.0; a separator interposed between the positive electrode and the negative electrode which are alternately laminated; a positive electrode tab which is electrically connected to the positive electrode current collector exposed portion and is led-out to an outside of the packaging material; and a negative electrode tab which is electrically connected to the negative electrode current collector exposed portion and is led-out to the outside of the packaging material.

Inventors:

MAKINO TETSUYA
TAKABAYASHI HIROSHI
NAKAMURA TOMOYUKI
HAYASHI KUNIHIKO
KONISHI YOSUKE
SASAKI AKIRA
SAITO AKIRA

Application Number:

JP2011135752A

Publication Date:

June 28, 2012

Filing Date:

June 17, 2011

Export Citation:

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Assignee:

SONY CORP

International Classes:

H01M10/04; H01M4/02; H01M4/13; H01M10/0585; H01M50/528

Domestic Patent References:

JP2002270241A	2002-09-20
JP2006252855A	2006-09-21
JP2001102033A	2001-04-13
JPH03230479A	1991-10-14
JPH04167371A	1992-06-15
JP2007227090A	2007-09-06
JP2003229117A	2003-08-15
JP2001126701A	2001-05-11

Attorney, Agent or Firm:

Masatomo Sugiura
Takuma Sugiura

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