US5998960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power supply system for electric vehicle
Assignee: Fuji Electric Co Ltd
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Filing: 1998-03-25
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Granted: 1999-12-07
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Expires: 2018-03-25
Abstract
Abstract An electric vehicle whose wheels are powered by a d.c. power supply includes a combination of a rechargeable high-energy battery and a rechargeable high-power battery or to a hybrid electric vehicle whose wheels are powered by the d.c. power supply and an internal combustion engine. The d.c. power supply is formed by connecting a d.c. circuit which comprises a rechargeable high-power battery and a current-stiff two-quadrant chopper in parallel with the rechargeable high-power battery. When an current of the rechargeable high-power battery is increased to a value which is greater than a specified value, the chopper is activated to charge or discharge the rechargeable high-power battery, thereby reducing an current of the rechargeable high-power battery to a value which is smaller than the specified value.
Inventors
- 👤 Jun Yamada
- 👤 Shigenori Kinoshita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:58
CPC Classifications
B; B60; B60K; B60K6/00; B60K6/20; B60K6/22; B60K6/26; B60K6/28; B60K6/32; B60K6/42; B60K6/46; B60L; B60L15/00; B60L15/007; B60L50/00; B60L50/40; B60L50/50; B60L50/60; B60L50/61; B60L50/62; B60L53/00; B60L53/10; B60L53/11; B60L58/00; B60L58/10; B60L58/18; B60L58/20; B60L7/00; B60L7/10; B60L7/18; B60W; B60W10/00; B60W10/04; B60W10/08; B60W10/24; B60W10/26; B60W10/28; B60W20/00; B60W20/10; B60W20/13; H; H02; H02J; H02J7/00; H02J7/14; H02J7/1415; H02J7/34; B60W2510/00; B60W2510/24; B60W2510/242; B60W2510/244; B60Y; B60Y2400/00; B60Y2400/11; B60Y2400/114; H02J7/342; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/62; Y02T10/64; Y02T10/70; Y02T10/7072; Y02T90/00; Y02T90/10; Y02T90/12; Y02T90/14; Y02T90/40; Y10; Y10S; Y10S903/00; Y10S903/902; Y10S903/903; Y10S903/904; Y10S903/906; Y10S903/907; Y10S903/908; Y10S903/944
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
128 words
A power supply system for use in an electric vehicle whose wheels are powered by a d.c. power supply comprising a combination of a high-energy rechargeable battery and a rechargeable high-power battery, the system comprising: a d.c. power supply circuit which is formed from a series-circuit comprised of the rechargeable high-power battery and a two-quadrant electric chopper which is connected in parallel with the rechargeable high-energy battery used as the main battery to constitute a d.c. power supply, wherein when the current of the high-energy rechargeable battery is increased to a value greater than a specified value, the chopper is actuated to charge or discharge the rechargeable high-power battery in such a way that the current of the high-energy rechargeable battery decreases to the specified value or less.
Claim 2
Dependent Claim
128 words
A power supply system for use in an electric vehicle whose wheels are powered by a d.c. power supply comprising a combination of a high-energy rechargeable battery and a rechargeable high-power battery, the system comprising: a d.c. power supply circuit which is formed from a series-circuit comprised of the rechargeable high-power battery and a two-quadrant electric chopper which is connected in parallel with the rechargeable high-energy battery used as the main battery to constitute a d.c. power supply, wherein when the current of the high-energy rechargeable battery is increased to a value greater than a specified value, the chopper is actuated to charge or discharge the rechargeable high-power battery in such a way that the current of the high-energy rechargeable battery decreases to the specified value or less.
Claim 3
Dependent Claim
132 words
A power supply system for use in a hybrid electric vehicle whose wheels are powered by an internal combustion engine and a d.c. power supply comprising a combination of a high-energy rechargeable battery and a rechargeable high-power battery, the system comprising: a d.c. power supply circuit which is formed from the rechargeable high-power battery and a current-stiff two-quadrant chopper and which is connected in parallel with the high-energy rechargeable battery used as the main battery to thereby constitute a d.c. power supply, wherein when the current of the high-energy rechargeable battery is increased to a value greater than a specified value, the chopper is actuated to charge or discharge the rechargeable high-power battery in such a way that the current of the high-energy rechargeable battery decreases to the specified value or less.
Claim 4
Dependent Claim
132 words
A power supply system for use in a hybrid electric vehicle whose wheels are powered by an internal combustion engine and a d.c. power supply comprising a combination of a high-energy rechargeable battery and a rechargeable high-power battery, the system comprising: a d.c. power supply circuit which is formed from the rechargeable high-power battery and a current-stiff two-quadrant chopper and which is connected in parallel with the high-energy rechargeable battery used as the main battery to thereby constitute a d.c. power supply, wherein when the current of the high-energy rechargeable battery is increased to a value greater than a specified value, the chopper is actuated to charge or discharge the rechargeable high-power battery in such a way that the current of the high-energy rechargeable battery decreases to the specified value or less.
Claim 5
Dependent Claim
26 words
The power supply system as defined in claim 2, wherein the high-energy rechargeable battery and the rechargeable high-power battery can be recharged by an engine generator.
Claim 6
Dependent Claim
26 words
The power supply system as defined in any one of claims 1, 2 or 3, wherein the rechargeable high-power battery corresponds to an electric double-layer capacitor.
Claim 7
Dependent Claim
25 words
The power supply system as defined in any one of claims 1, 2 or 3, wherein the high-energy rechargeable battery corresponds to a chemical battery.
Claim 8
Dependent Claim
19 words
The power supply system as defined in claim 5, wherein the high-energy rechargeable battery corresponds to a fuel cell.
Claim 9
Dependent Claim
84 words
A d.c. power supply system of use in an electric vehicle, comprising: a rechargeable high-power battery (HPB) connected in series with a two quadrant chopper, thereby forming a series circuit, said series circuit connected in parallel with a high-energy battery (HEB), thereby forming a d.c. power supply, a regenerative braking system that generates electric energy as a result of a braking system of a vehicle being used to decelerate said vehicle, said chopper circuit for enabling charging of said HPB with said electric energy.
Claim 10
Dependent Claim
84 words
A d.c. power supply system of use in an electric vehicle, comprising: a rechargeable high-power battery (HPB) connected in series with a two quadrant chopper, thereby forming a series circuit, said series circuit connected in parallel with a high-energy battery (HEB), thereby forming a d.c. power supply, a regenerative braking system that generates electric energy as a result of a braking system of a vehicle being used to decelerate said vehicle, said chopper circuit for enabling charging of said HPB with said electric energy.
Claim 11
Dependent Claim
25 words
The system of claim 7 wherein said chopper circuit enables discharging of said HPB when the output current of the HEB reaches a predetermined amount.
Claim 12
Dependent Claim
38 words
The system of claim 8 wherein said chopper circuit is used to decrease the current of the HEB to a specified value or less than said specified value when the current of the HEB exceeds said specified value.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-12-06 | 2003-06-07 | 2003-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-12-06 | 2007-06-07 | 2007-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-12-06 | 2011-06-07 | 2011-12-07 | $7700.00 | Window Closed / Lapsed |