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. 12, 2001
Filed:
Jul. 03, 2000
Syuji Satake, Shizuoka-ken, JP;
Hisashi Takemoto, Shizuoka-ken, JP;
Yazaki Corporation, Tokyo, JP;
Abstract
A battery charge control device is capable of detecting a gassing state in a battery without using a temperature sensor. Under condition of charging the battery,with a charging current, when a terminal voltage Vi of the battery,monitored by the device exceeds a threshold value, a temporary-gassing detecting unit,informs a voltage regulation calculating unit,that the battery,is in course of reaching its gassing state. The voltage regulation calculating unit,calculates a changing rate of terminal voltage Vi of the battery,while it is in course of reaching the gassing state. When the calculated changing rate exceeds a preset decision value, a gassing detecting unit,judges that the battery,has just reached the gassing state. A decision value renewing unit,changes the decision value corresponding to the charging current.