US5243269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery power supply system
Assignee: Hitachi Ltd
•
Filing: 1991-11-25
•
Granted: 1993-09-07
•
Expires: 2011-11-25
Abstract
Abstract A battery power supply system for supplying DC electric power to a DC operated apparatus includes an AC/DC adapter for converting AC electric power into DC electric power, a plurality of batteries and a battery charger for charging the plurality of batteries. The battery power supply system includes a plurality of charge lines for connecting the battery charger to the plurality of batteries and a plurality of discharge lines connected to outputs of the plurality of batteries. Switches are provided in each of the plurality of charge lines and discharge lines.
Inventors
- 👤 Kunihiro Katayama
- 👤 Kenichi Kaki
- 👤 Takashi Tsunehiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:12
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/50; H02J7/575; H02J1/00; H02J1/10; H02J9/00; H02J9/04; H02J9/06; H02J9/061
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
157 words
A battery power supply system comprising: an input terminal for receiving AC electric power; an output terminal for supplying DC electric power to a DC operated apparatus; an AC/DC adapter for receiving the AC electric power from said input terminal, converting the AC electric power into the DC electric power and supplying the DC electric power to said output terminal; a plurality of batteries for supplying the DC electric power to said output terminal; a battery charger for charging said batteries by the AC electric power received from said input terminal; a plurality of charge lines for connecting said battery charger to said plurality of batteries individually; a plurality of discharge lines for connecting said plurality of batteries to said output terminal individually; and switches provided in each of said plurality of charge lines and said plurality of discharge lines wherein said switches are operated by exclusive logic control to turn on only one of said switches.
Claim 2
Dependent Claim
157 words
A battery power supply system comprising: an input terminal for receiving AC electric power; an output terminal for supplying DC electric power to a DC operated apparatus; an AC/DC adapter for receiving the AC electric power from said input terminal, converting the AC electric power into the DC electric power and supplying the DC electric power to said output terminal; a plurality of batteries for supplying the DC electric power to said output terminal; a battery charger for charging said batteries by the AC electric power received from said input terminal; a plurality of charge lines for connecting said battery charger to said plurality of batteries individually; a plurality of discharge lines for connecting said plurality of batteries to said output terminal individually; and switches provided in each of said plurality of charge lines and said plurality of discharge lines wherein said switches are operated by exclusive logic control to turn on only one of said switches.
Claim 3
Dependent Claim
146 words
A battery power supply system comprising: an input terminal for receiving AC electric power; an output terminal for supplying DC electric power to a DC operated apparatus; an AC/DC adapter for receiving the AC electric power from said input terminal, converting the AC electric power into the DC electric power and supplying the DC electric power to said output terminal; a plurality of batteries for supplying the DC electric power to said output terminal; a battery charger for charging said batteries by the AC electric power received from said input terminal; a plurality of charge lines for connecting said battery charger to said plurality of batteries individually; a plurality of discharge lines for connecting said plurality of batteries to said output terminal individually; and switches provided in each of said plurality of charge lines and said plurality of discharge lines, wherein said switches comprise power MOSFETs.
Claim 4
Dependent Claim
146 words
A battery power supply system comprising: an input terminal for receiving AC electric power; an output terminal for supplying DC electric power to a DC operated apparatus; an AC/DC adapter for receiving the AC electric power from said input terminal, converting the AC electric power into the DC electric power and supplying the DC electric power to said output terminal; a plurality of batteries for supplying the DC electric power to said output terminal; a battery charger for charging said batteries by the AC electric power received from said input terminal; a plurality of charge lines for connecting said battery charger to said plurality of batteries individually; a plurality of discharge lines for connecting said plurality of batteries to said output terminal individually; and switches provided in each of said plurality of charge lines and said plurality of discharge lines, wherein said switches comprise power MOSFETs.
Claim 5
Dependent Claim
29 words
A battery power supply system according to claim 2, wherein said switches provided in said discharge lines comprise two P-channel MOSFETs having drains connected in series to each other.
Claim 6
Dependent Claim
160 words
A battery power supply system comprising: an input terminal for receiving AC electric power; an output terminal for supplying DC electric power to a DC operated apparatus; an AC/DC adapter for receiving the AC electric power from said input terminal, converting the AC electric power into the DC electric power and supplying the DC electric power to said output terminal; a plurality of batteries for supplying the DC electric power to said output terminal; a battery charger for charging said batteries by the AC electric power received from said input terminal; a plurality of charge lines for connecting said battery charger to said plurality of batteries individually; a plurality of discharge lines for connecting said plurality of batteries to said output terminal individually; and switches provided in each of said plurality of charge lines and said plurality of discharge lines, wherein said switches provided in each of said plurality of charge lines are controlled to be turned on and off.
Claim 7
Dependent Claim
160 words
A battery power supply system comprising: an input terminal for receiving AC electric power; an output terminal for supplying DC electric power to a DC operated apparatus; an AC/DC adapter for receiving the AC electric power from said input terminal, converting the AC electric power into the DC electric power and supplying the DC electric power to said output terminal; a plurality of batteries for supplying the DC electric power to said output terminal; a battery charger for charging said batteries by the AC electric power received from said input terminal; a plurality of charge lines for connecting said battery charger to said plurality of batteries individually; a plurality of discharge lines for connecting said plurality of batteries to said output terminal individually; and switches provided in each of said plurality of charge lines and said plurality of discharge lines, wherein said switches provided in each of said plurality of charge lines are controlled to be turned on and off.
Claim 8
Dependent Claim
29 words
A battery power supply system according to claim 4, wherein said switches are controlled to be turned on and off by a control signal determined by a battery condition.
References Cited (Backward Citations)
US4323788A
Cited
JPH06223045A
Cited
US4754160A
Cited
US4673826A
Cited
US4885521A
Cited
US5177425A
Cited
JPH06219911A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-09-06 | 1997-03-08 | 1997-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-06 | 2001-03-08 | 2001-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-06 | 2005-03-08 | 2005-09-07 | $7700.00 | Window Closed / Lapsed |