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:
Nov. 19, 2013
Filed:
Aug. 29, 2011
Takao Kobayashi, Sumoto, JP;
Toru Nishikawa, Sumoto, JP;
Takao Kobayashi, Sumoto, JP;
Toru Nishikawa, Sumoto, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
One cycle is corrected every charging/discharging cycle in accordance with a cycle deterioration accelerating coefficient. The corrected one cycles are accumulated. A storage period is corrected in accordance with a storage deterioration accelerating coefficient every hour. The corrected storage periods are accumulated. In the storage period, a rechargeable battery is stored with the terminal voltage higher than a predetermined voltage. A deterioration coefficient is obtained as the product of a cycle deterioration coefficient calculated in accordance with the accumulated cycle number, and a storage deterioration coefficient calculated in accordance with the accumulated value of the storage periods (Step S). If the deterioration coefficients falls within the range 0.3 to 0.7 (Step S: NO), the setting voltage in constant-voltage and constant-current charging operation is decreased from 4.2 to 4.1 V (S). If it is smaller than 0.3 (S: NO, S: YES), the setting voltage is decreased to 3.8 V (S).