US5446364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fast charging arrangement
Assignee: Nokia Oyj
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Filing: 1992-02-14
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Granted: 1995-08-29
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Expires: 2012-02-14
Abstract
Abstract In a fast charging arrangement between a charger (20) and a battery-powered device (20) the charging current of the battery (36) is controlled with a logic arrangement (38) as a function of the charging state and/or temperature of the battery. According to the invention, the connection (10, 12) between the charger (10) and the battery-powered device (30) is bipolar, the logic arrangement (38) having been disposed in the battery-powered device (30), advantageously in a mobile telephone.
Inventors
- 👤 Matti Naskali
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:21
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/90; H02J7/971; H02J7/975; H02J7/977; H02J7/96
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
182 words
A fast charging apparatus, comprising: a battery-powered radio telephone device having a battery to be recharged; a charger means separate from the battery powered radio telephone for charging the battery of the battery-powered radio telephone device with charging current and voltage, said charger means having a constant-current generator for generating a constant current; and a connection between said charger and said battery-powered radio telephone device, said connection having only two spaced apart conductors extending and making connection between said charger and said battery-powered radio telephone device; the battery-powered radio telephone device comprising: a shunt switch in electrical connection with a charger connection of said two-conductor connection and being controllable between open and closed positions, means for controlling, as a function of at least a charging state and temperature of the battery which powers said battery-powered radio telephone device, the position of said shunt switch, said controlling means including a logic arrangement within the battery-powered radio telephone device; and means for conducting the constant current to the battery from the charger connection in response to said shunt switch being in said closed position.
Claim 2
Dependent Claim
182 words
A fast charging apparatus, comprising: a battery-powered radio telephone device having a battery to be recharged; a charger means separate from the battery powered radio telephone for charging the battery of the battery-powered radio telephone device with charging current and voltage, said charger means having a constant-current generator for generating a constant current; and a connection between said charger and said battery-powered radio telephone device, said connection having only two spaced apart conductors extending and making connection between said charger and said battery-powered radio telephone device; the battery-powered radio telephone device comprising: a shunt switch in electrical connection with a charger connection of said two-conductor connection and being controllable between open and closed positions, means for controlling, as a function of at least a charging state and temperature of the battery which powers said battery-powered radio telephone device, the position of said shunt switch, said controlling means including a logic arrangement within the battery-powered radio telephone device; and means for conducting the constant current to the battery from the charger connection in response to said shunt switch being in said closed position.
Claim 3
Dependent Claim
32 words
An apparatus as in claim 1, wherein said constant current generator means of said charger means generates the constant current to equal a fast charging current of the battery to be recharged.
Claim 4
Dependent Claim
49 words
An apparatus as in claim 1, wherein said radio telephone device including constant trickle current generator means for generating a trickle current of the battery to be recharged, said trickle current generator receiving the output of said charger and supplying the trickle current when said shunt switch is open.
Claim 5
Dependent Claim
23 words
An apparatus as in claim 1, wherein the battery to be recharged is any one of a nickel-cadmium battery and a nickel-hydride battery.
Claim 6
Dependent Claim
32 words
An apparatus as in claim 1, wherein said constant current generator means generates a trickle current of the battery by intermittent operation of said shunt switch in response to said logic arrangement.
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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) | 1998-08-28 | 1999-02-27 | 1999-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-28 | 2003-02-27 | 2003-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-28 | 2007-02-27 | 2007-08-29 | $7700.00 | Window Closed / Lapsed |