Protection circuit with minimized voltage reference unevenness between charger and battery pack
US7570026B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 13, 2007 |
| Grant date | Aug 4, 2009 |
| Priority date | — |
| Expiry date | Feb 14, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/00302
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A protection circuit comprising: a second circuit to be connected to a first circuit, the first circuit including: a first reference voltage generating circuit configured to generate a first reference voltage; a first comparing voltage generating circuit configured to generate a first comparing voltage; a first comparator configured to output a first comparing output voltage; and a first control circuit, the second circuit including: a second comparing voltage generating circuit configured to be input with the first reference voltage and to generate a second comparing voltage to be compared with a battery voltage based on the first reference voltage; a second comparator configured to output a second comparing output voltage corresponding to relation in magnitude between the second comparing voltage and the battery voltage; and a second control circuit configured to control the supply of the charging voltage to the secondary battery corresponding to the second comparing output voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.