Method of charging storage battery in power supply system having another battery of larger capacity
US3987352A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 30, 1975 |
| Grant date | Oct 19, 1976 |
| Priority date | — |
| Expiry date | May 30, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S320/34
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a power supply system constituted of a relatively high output and small capacity first battery such as a lead or alkaline storage battery and a lower output and larger capacity second battery such as a fuel cell, a portion of the discharge current of the second battery is utilized for charging the first battery, while the system is delivering a fluctuating load current under the control of a chopper, by controlling the flow of the charging current through a second chopper circuit such that the charging current is continuously furnished to the first battery when its residual capacity decreases to a predetermined value, but is interrupted periodically when the residual capacity reaches a predetermined upper limit so as to compensate slightly insufficiently for discharged energy in each cycle of the load current controlling chopper actions, resulting in gradual drop of the residual capacity to the former predetermined value and recurrence of the continuous charging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.