US5545935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rechargeable system with separate battery circuits in a common module
Assignee: Dell USA LP
•
Filing: 1995-05-18
•
Granted: 1996-08-13
•
Expires: 2015-05-18
Abstract
Abstract A portable electronic system which has two electrically separate battery banks in a single removable battery pack. A power-management controller switches between the two banks in service--even when neither of the banks is exhausted--to provide optimal active and resting times for the batteries.
Inventors
- 👤 Gregory N. Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:40
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/34
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
180 words
A computer system comprising: multiple electronic components connected together, including at least one microprocessor and one display; a receptacle, within said computer system, electrically connected to said multiple electronic components, for receiving a removable battery pack, said battery pack containing at least two separate battery banks; a switching unit, electrically connected to said multiple electronic components, and to said battery banks, to switch between said at least two separate battery banks such that a selected one of said at least two separate battery banks is coupled to provide power to said computer system at a given time; control logic, connected to said switching unit and configured to cause said switching unit to switch repeatedly between said at least two separate battery banks at a predetermined set frequency; and at least two charger circuits respectively coupled to said at least two separate battery banks; wherein coupling said computer system to an external power source enables the simultaneous powering of said computer system and charging of both of said at least two separate battery banks via said at least two charger circuits.
Claim 2
Dependent Claim
180 words
A computer system comprising: multiple electronic components connected together, including at least one microprocessor and one display; a receptacle, within said computer system, electrically connected to said multiple electronic components, for receiving a removable battery pack, said battery pack containing at least two separate battery banks; a switching unit, electrically connected to said multiple electronic components, and to said battery banks, to switch between said at least two separate battery banks such that a selected one of said at least two separate battery banks is coupled to provide power to said computer system at a given time; control logic, connected to said switching unit and configured to cause said switching unit to switch repeatedly between said at least two separate battery banks at a predetermined set frequency; and at least two charger circuits respectively coupled to said at least two separate battery banks; wherein coupling said computer system to an external power source enables the simultaneous powering of said computer system and charging of both of said at least two separate battery banks via said at least two charger circuits.
Claim 3
Dependent Claim
15 words
The computer system as recited in claim 1 wherein said switching unit is a relay.
Claim 4
Dependent Claim
33 words
The computer system as recited in claim 1 wherein said predetermined set frequency is selected such that said control logic switches between said at least two separate battery banks approximately every four minutes.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-08-13 | 2000-02-12 | 2000-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-13 | 2004-02-12 | 2004-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-13 | 2008-02-12 | 2008-08-13 | $7700.00 | Window Closed / Lapsed |