Patent US4425245A successfully refreshed from Google Patents.
Patent US5828202A successfully refreshed from Google Patents.
US5828202A
Expired / Lapsed
US
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Battery apparatus
Assignee: Godo Kaisha IP Bridge 1
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Filing: 1997-02-27
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Granted: 1998-10-27
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Expires: 2017-02-27
Abstract
Abstract The battery apparatus has a circuit to turn off a switching device and suspend charging when rechargeable battery voltage exceeds a specified voltage, and to turn on the switching device and resume charging when rechargeable battery voltage drops below the specified voltage. The switching device is switched on and off to pulse charge the rechargeable battery. When cut-off of charging voltage to the rechargeable battery is detected, an over-ride circuit forces the switching device on, or a forced discharge circuit discharges the rechargeable battery until battery voltage drops below the specified voltage.
Inventors
- 👤 Mikitaka Tamai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:31
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/90; H02J7/927; H02J7/60; H02J7/62; H02J7/64
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
92 words
A battery apparatus comprising: (1) a switching device connected between a battery charger and a rechargeable battery; (2) a pulse control circuit to control on and off the switching device, the pulse control circuit turn off the switching device and suspend charging when rechargeable battery voltage exceeds a specified voltage, and turn on the switching device and resume charging when rechargeable battery voltage drops below the specified voltage; and (3) an over-ride circuit to detect a cut-off of charging voltage application to the rechargeable battery and to force the switching device on.
Claim 2
Dependent Claim
92 words
A battery apparatus comprising: (1) a switching device connected between a battery charger and a rechargeable battery; (2) a pulse control circuit to control on and off the switching device, the pulse control circuit turn off the switching device and suspend charging when rechargeable battery voltage exceeds a specified voltage, and turn on the switching device and resume charging when rechargeable battery voltage drops below the specified voltage; and (3) an over-ride circuit to detect a cut-off of charging voltage application to the rechargeable battery and to force the switching device on.
Claim 3
Dependent Claim
18 words
A battery apparatus as recited in claim 1 wherein the rechargeable battery is a lithium ion rechargeable battery.
Claim 4
Dependent Claim
18 words
A battery apparatus as recited in claim 1 wherein the battery apparatus contains a rechargeable battery protection circuit.
Claim 5
Dependent Claim
22 words
A battery apparatus as recited in claim 3 wherein the switching device is an FET contained in the rechargeable battery protection circuit.
Claim 6
Dependent Claim
27 words
A battery apparatus as recited in claim 3 wherein the pulse control circuit is a voltage detection circuit and is contained in the rechargeable battery protection circuit.
Claim 7
Dependent Claim
35 words
A battery apparatus as recited in claim 5 wherein the voltage detection circuit is a circuit which, when battery voltage exceeds the specified voltage, turns the switching device off after a fixed period of time.
Claim 8
Dependent Claim
20 words
A battery apparatus as recited in claim 3 wherein the over-ride circuit is contained in a rechargeable battery protection circuit.
Claim 9
Dependent Claim
117 words
A battery apparatus comprising: (a) a battery charger to charge a rechargeable battery; and (b) a battery pack which attaches to the battery charger in a detachable manner including: (1) a switching device connected between the battery charger and the rechargeable battery; (2) a pulse control circuit to control on and off the switching device, the pulse control circuit turn off the switching device and suspend charging when rechargeable battery voltage exceeds a specified voltage, and turn on the switching device and resume charging when rechargeable battery voltage drops below the specified voltage; and (3) an over-ride circuit to detect a cut-off of charging voltage application to the rechargeable battery and to force the switching device on.
Claim 10
Dependent Claim
117 words
A battery apparatus comprising: (a) a battery charger to charge a rechargeable battery; and (b) a battery pack which attaches to the battery charger in a detachable manner including: (1) a switching device connected between the battery charger and the rechargeable battery; (2) a pulse control circuit to control on and off the switching device, the pulse control circuit turn off the switching device and suspend charging when rechargeable battery voltage exceeds a specified voltage, and turn on the switching device and resume charging when rechargeable battery voltage drops below the specified voltage; and (3) an over-ride circuit to detect a cut-off of charging voltage application to the rechargeable battery and to force the switching device on.
Claim 11
Dependent Claim
32 words
A battery apparatus as recited in claim 8 wherein the battery pack contains a protection circuit, and the protection circuit contains the switching device, the pulse control circuit, and the over-ride circuit.
Claim 12
Dependent Claim
18 words
A battery apparatus as recited in claim 8 wherein the rechargeable battery is a lithium ion rechargeable battery.
Claim 13
Dependent Claim
15 words
A battery apparatus as recited in claim 9 wherein the switching device is an FET.
Claim 14
Dependent Claim
18 words
A battery apparatus as recited in claim 9 wherein the pulse control circuit is a voltage detection circuit.
Claim 15
Dependent Claim
35 words
A battery apparatus as recited in claim 12 wherein the voltage detection circuit is a circuit which, when battery voltage exceeds the specified voltage, turns the switching device off after a fixed period of time.
Claim 16
Dependent Claim
33 words
A battery apparatus as recited in claim 9 wherein the over-ride circuit is a circuit to detect removal of the battery pack from the battery charger and to turn the switching device on.
Claim 17
Dependent Claim
92 words
A battery apparatus comprising: (1) a switching device; (2) a pulse control circuit to control on and off the switching device, the pulse control circuit turn off the switching device and suspend charging when rechargeable battery voltage exceeds a specified voltage, and turn on the switching device and resume charging when rechargeable battery voltage drops below the specified voltage; and (3) a forced discharge circuit to forcibly discharge the rechargeable battery until battery voltage drops below the specified voltage, when it detects a cut-off of charging voltage application to the rechargeable battery.
Claim 18
Dependent Claim
92 words
A battery apparatus comprising: (1) a switching device; (2) a pulse control circuit to control on and off the switching device, the pulse control circuit turn off the switching device and suspend charging when rechargeable battery voltage exceeds a specified voltage, and turn on the switching device and resume charging when rechargeable battery voltage drops below the specified voltage; and (3) a forced discharge circuit to forcibly discharge the rechargeable battery until battery voltage drops below the specified voltage, when it detects a cut-off of charging voltage application to the rechargeable battery.
Claim 19
Dependent Claim
18 words
A battery apparatus as recited in claim 15 wherein the rechargeable battery is a lithium ion rechargeable battery.
Claim 20
Dependent Claim
18 words
A battery apparatus as recited in claim 15 wherein the battery apparatus contains a rechargeable battery protection circuit.
Claim 21
Dependent Claim
22 words
A battery apparatus as recited in claim 17 wherein the switching device is an FET contained in the rechargeable battery protection circuit.
Claim 22
Dependent Claim
27 words
A battery apparatus as recited in claim 17 wherein the pulse control circuit is a voltage detection circuit and is contained in the rechargeable battery protection circuit.
Claim 23
Dependent Claim
35 words
A battery apparatus as recited in claim 19 wherein the voltage detection circuit is a circuit which, when battery voltage exceeds the specified voltage, turns the switching device off after a fixed period of time.
Claim 24
Dependent Claim
21 words
A battery apparatus as recited in claim 15 wherein the forced discharge circuit is contained in a rechargeable battery protection circuit.
Claim 25
Dependent Claim
125 words
A battery apparatus comprising: (a) a battery charger to charge a rechargeable battery; and (b) a battery pack which attaches to the battery charger in a detachable manner including: (1) a switching device connected between the battery charger and the rechargeable battery; (2) a pulse control circuit to control on and off the switching device, the pulse control circuit turn off the switching device and suspend charging when rechargeable battery voltage exceeds a specified voltage, and turn on the switching device and resume charging when rechargeable battery voltage drops below the specified voltage; and (3) a forced discharge circuit to forcibly discharge the rechargeable battery until battery voltage drops below the specified voltage, when it detects cut-off of charging voltage application to the rechargeable battery.
Claim 26
Dependent Claim
125 words
A battery apparatus comprising: (a) a battery charger to charge a rechargeable battery; and (b) a battery pack which attaches to the battery charger in a detachable manner including: (1) a switching device connected between the battery charger and the rechargeable battery; (2) a pulse control circuit to control on and off the switching device, the pulse control circuit turn off the switching device and suspend charging when rechargeable battery voltage exceeds a specified voltage, and turn on the switching device and resume charging when rechargeable battery voltage drops below the specified voltage; and (3) a forced discharge circuit to forcibly discharge the rechargeable battery until battery voltage drops below the specified voltage, when it detects cut-off of charging voltage application to the rechargeable battery.
Claim 27
Dependent Claim
33 words
A battery apparatus as recited in claim 22 wherein the battery pack contains a protection circuit, and the protection circuit contains the switching device, the pulse control circuit, and the forced discharge circuit.
Claim 28
Dependent Claim
18 words
A battery apparatus as recited in claim 22 wherein the rechargeable battery is a lithium ion rechargeable battery.
Claim 29
Dependent Claim
15 words
A battery apparatus as recited in claim 22 wherein the switching device is an FET.
Claim 30
Dependent Claim
18 words
A battery apparatus as recited in claim 23 wherein the pulse control circuit is a voltage detection circuit.
Claim 31
Dependent Claim
35 words
A battery apparatus as recited in claim 22 wherein the voltage detection circuit is a circuit which, when battery voltage exceeds the specified voltage, turns the switching device off after a fixed period of time.
Claim 32
Dependent Claim
37 words
A battery apparatus as recited in claim 22 wherein the forced discharge circuit detects removal of the battery pack from the battery charger and forcibly discharges the rechargeable battery until battery voltage drops below the specified voltage.
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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) | 2001-10-26 | 2002-04-27 | 2002-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-10-26 | 2006-04-27 | 2006-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-10-26 | 2010-04-27 | 2010-10-27 | $7700.00 | Window Closed / Lapsed |