Charging or discharging apparatus for electrically charging or discharging a capacitor storage type power source adapted to store electric energy in electric double layer capacitors
US7622898B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2007 |
| Grant date | Nov 24, 2009 |
| Priority date | — |
| Expiry date | Jan 5, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J2207/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A charging apparatus for electrically charging a capacitor storage type power source comprises a switching circuit for turning on/off the charge current, a current detection circuit for detecting the charge current, a voltage detection circuit for detecting the voltage of power source, a constant current control circuit for outputting an error amplifying signal according to the current value, a power control circuit for outputting an error amplifying signal according to the current value, the voltage value-and a power reference value, a constant voltage control circuit for outputting an error amplifying signal according to the voltage value and a voltage reference value, an OR circuit for selecting one of the error amplifying signals and a control circuit for generating a pulse width modulation signal according to the error amplifying signal output from the OR circuit to turn on/off the switching circuit and control the charge current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.