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:
Feb. 26, 2019
Filed:
Feb. 19, 2014
Nec Energy Devices, Ltd., Sagamihara-shi, Kanagawa, JP;
Tadahiro Yoshida, Kanagawa, JP;
NEC Energy Devices, Ltd., Sagamihara-shi, Kanagawa, JP;
Abstract
Provided is a battery pack capable of more reliably preventing adverse effects from being externally exerted. MCU () measures, as index values pertaining to the deterioration state of battery unit (), at least two or more from among: a capacity reduction rate that is the reduction rate of the full-charge capacity of battery unit () from an initial value; a cycle count representing the number of times that a cycle, in which battery unit () is charged until the cumulative value of charge quantities charged to battery unit () reaches a prescribed charge quantity, has been performed; the number of times that battery unit () has been charged; time elapsed from the manufacturing of battery unit (); cell voltages that are the voltages of secondary battery cells; and determines whether battery unit () has reached its end of life by using the measured index values. Monitoring ICsuspends the use of battery unit () when battery unit () has reached its end of life.