The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 01, 2010
Filed:
Aug. 25, 2006
Toshio Yanagida, Itano-gun, JP;
Yoshinobu Okumura, Sumoto, JP;
Yasuhiro Yamauchi, Sumoto, JP;
Naoya Nakanishi, Tokushima, JP;
Toshiyuki Nohma, Kobe, JP;
Toshio Yanagida, Itano-gun, JP;
Yoshinobu Okumura, Sumoto, JP;
Yasuhiro Yamauchi, Sumoto, JP;
Naoya Nakanishi, Tokushima, JP;
Toshiyuki Nohma, Kobe, JP;
Sanyo Electric Co., Ltd., Moriguchi-shi, JP;
Abstract
A nonaqueous secondary batteryof the invention has an active material compound layerdeposed over at least one face of a collectormade of metal foil and is equipped with a positive electrodehaving a portionin a part of which metal is exposed. The positive electrodetogether with the exposed-metal portionfaces a negative electrodethrough an interposed separator, and on that part of the exposed-metal portionthat faces the negative electrodethrough the interposed separatorthere is formed a protective layermade of a material whose electronic conductivity is lower than that of the metal and which moreover is non-insulative. With such nonaqueous secondary battery, should part of an electrode pierce the separator and contact with the other electrode, the battery will be gently discharged, thereby averting abnormal heat generation by the battery and additionally enabling the battery's abnormality to be sensed by the equipment via the fall in battery voltage. Thus, there is provided a nonaqueous secondary battery of excellent safety that can prevent abnormal heat generation due to a short circuit caused by burr, powder or the like piercing the separator.