CA2567562A1 - Supercapacitor backup power supply with bi-directional power flow - Google Patents

Supercapacitor backup power supply with bi-directional power flow Download PDF

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Publication number
CA2567562A1
CA2567562A1 CA 2567562 CA2567562A CA2567562A1 CA 2567562 A1 CA2567562 A1 CA 2567562A1 CA 2567562 CA2567562 CA 2567562 CA 2567562 A CA2567562 A CA 2567562A CA 2567562 A1 CA2567562 A1 CA 2567562A1
Authority
CA
Canada
Prior art keywords
switch
controller
single circuit
diode
supercapacitor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA 2567562
Other languages
French (fr)
Other versions
CA2567562C (en
Inventor
Keith Baker
Larry Forsythe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Psion Inc
Original Assignee
Psion Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Psion Inc filed Critical Psion Inc
Priority to CA 2567562 priority Critical patent/CA2567562C/en
Priority to CN 200710159693 priority patent/CN101232201B/en
Publication of CA2567562A1 publication Critical patent/CA2567562A1/en
Priority to HK09100875.1A priority patent/HK1121295A1/en
Application granted granted Critical
Publication of CA2567562C publication Critical patent/CA2567562C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1582—Buck-boost converters

Abstract

A system for providing backup power supply to a device is provided. The system includes a supercapacitor and a single circuit for charging and discharging of a supercapacitor. The single circuit operates with an inductor to provide for charging and discharging of the supercapacitor.

Claims (33)

1. A system for backup power supply, the system comprising:
a supercapacitor; and a single circuit for charging and discharging of the supercapacitor, the single circuit including a path having an inductor for operating in charging mode for the charging and in backup mode for the discharging.
2. The system according to claim 1, wherein the single circuit includes:

a first switch connected between a first node of the inductor and a potential;

a first diode connected in parallel with the first switch;

a second switch connected between a ground and the first node of the inductor;

and a second diode being connected in parallel with the second switch.
3. The system according to claim 2, wherein the first switch and the second switch are operated to charge the supercapacitor when the potential is available, and discharge the supercapacitor when the potential is lost.
4. The system according to claim 2 or 3, wherein at least one of the first switch and the second switch is a Metal-Oxide-Semiconductor Field-Effect Transistor.
(MOSFET).
5. The system according to claim 4, wherein at least one of the first diode and the second diode is an intrinsic diode of the MOSFET.
6. The system according to claim 4, wherein at least one of the first diode and the second diode is a schottky diode.
7. The system according to any one of claims 2-6, further comprising a controller for controlling the first switch and the second switch.
8. The system according to claim 7, wherein the controller operates the first switch and the second switch in conjunction with the inductor to form a buck converter with a synchronous rectifier.
9. The system according to claim 7 or 8, wherein the controller operates the first switch and the second switch in conjunction with the inductor to form a boost converter with a synchronous rectifier.
10. The system according to any one of claims 7-9, wherein the controller and at least one of the first switch and the second switch are formed in an integrated circuit.
11. The system according to claim 1, wherein the single circuit forms a buck converter or boost converter in dependence upon whether the single circuit is in the charging mode or in the bucking mode.
12. The system according to claim 11, further comprising a controller for forming the buck converter or the boost converter.
13. The system according to claim 1, wherein the single circuit includes a first feedback path and a second feedback path, one of the first feedback path and the second feedback path being activated in the charging mode, the other being activated in backup mode.
14. The system according to claim 13, further comprising a controller for controlling the operation of the single circuit.
15. The system according to any one of claims 7-10, 12 and 14, wherein the system has a plurality modes including the charging mode for the charging and the backup mode for the discharging, and wherein the controller monitors a primary power supply for a potential, the voltage of the supercapacitor voltage, the potential, the current of the inductor, or combinations thereof and controls the modes of the single circuit based on one or more than one result of the monitoring.
16. The system according to claim 12 or 14, wherein circuitry for the controller is located on an integrated circuit.
17. The system according to any one of claims 7-10, 12, 14, and 16, wherein the integrated circuit has a current sense signal as an input thereto.
18. The system according to any one of claims 7-10, 12, 14, and 16, wherein the controller has a current control mode, a voltage control mode or a combination thereof.
19. A system for backup power supply, the system comprising:
a supercapacitor;

an inductor;

a single circuit operating with the inductor to provide for charging and discharging of the supercapacitor; and a controller for monitoring and controlling the single circuit.
20. The system according to claim 19, wherein the single circuit is connected to a potential and wherein the controller operates the single circuit to charge the supercapacitor when the potential is available and to discharge the supercapacitor to provide the backup power when the potential is lost.
21. The system according to claim 19 or 20, wherein the controller operates the single circuit in conjunction with the inductor to form a buck converter.
22. The system according to any one of claims 19-21, wherein the controller operates the single circuit in conjunction with the inductor to form a boost converter.
23. The system according to any one of claims 19-22, wherein the controller and the single circuit forms an integrated circuit.
24. The system according to claim 19, wherein the single circuit includes a first feedback path and a second feedback path, one of the first feedback path and the second feedback path being activated in the charging mode, the other being activated in backup mode.
25. The system according to any one of claims 19-24, wherein the controller has a current sense signal as an input thereto.
26. The system according to any one of claims 19-25, wherein the controller has a current control mode, a voltage control mode or a combination thereof.
27. The system according to any one of claims 19-26, wherein the controller monitors a primary power supply for a potential, the voltage of the supercapacitor voltage, the potential, the current of the inductor, or combinations thereof and controls the operation of the single circuit based on one or more than one result of the monitoring.
28. The system according to claim 27, wherein the system has a plurality of modes including a charging mode for charging the supercapacitor and a backup mode for discharging the supercapacitor, and wherein the controller sets the mode based on the one or more than one result of the monitoring.
29. The system according to claim 19 or 20, wherein the single circuit includes:
a first switch connected between the inductor and a potential and being controlled by the controller;

a first diode connected in parallel with the first switch;

a second switch connected between a ground and the inductor, and being controlled by the controller; and a second diode connected in parallel with the second switch.
30. The system according to claim 29, wherein at least one of the first switch and the second switch is a Metal-Oxide-Semiconductor Field-Effect Transistor.
(MOSFET).
31. The system according to claim 30, wherein at least one of the first diode and the second diode is an intrinsic diode of the MOSFET.
32. The system according to claim 30, wherein at least one of the first diode and the second diode is a schottky diode.
33. The system according to any one of claims 29-32, wherein the controller, at least one of the first switched and the second switches and at least one of the first diodes and the second diodes forms an integrated circuit.
CA 2567562 2006-11-10 2006-11-10 Supercapacitor backup power supply with bi-directional power flow Expired - Fee Related CA2567562C (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA 2567562 CA2567562C (en) 2006-11-10 2006-11-10 Supercapacitor backup power supply with bi-directional power flow
CN 200710159693 CN101232201B (en) 2006-11-10 2007-11-12 Supercapacitor backup power supply with bi-directional powerflow
HK09100875.1A HK1121295A1 (en) 2006-11-10 2009-01-30 Supercapacitor backup power supply with bi-directional power flow

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA 2567562 CA2567562C (en) 2006-11-10 2006-11-10 Supercapacitor backup power supply with bi-directional power flow

Publications (2)

Publication Number Publication Date
CA2567562A1 true CA2567562A1 (en) 2008-05-10
CA2567562C CA2567562C (en) 2010-01-12

Family

ID=39367172

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2567562 Expired - Fee Related CA2567562C (en) 2006-11-10 2006-11-10 Supercapacitor backup power supply with bi-directional power flow

Country Status (3)

Country Link
CN (1) CN101232201B (en)
CA (1) CA2567562C (en)
HK (1) HK1121295A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011103744A (en) * 2009-11-11 2011-05-26 Ricoh Co Ltd Switching power-supply circuit
KR101633370B1 (en) * 2010-04-21 2016-06-24 삼성전자주식회사 Power Control Method And Portable Device supporting the same
CN102135790A (en) * 2011-03-07 2011-07-27 德州学院 Human-controllable charged notebook computer
CN102856972A (en) * 2011-06-29 2013-01-02 艾默生网络能源有限公司 Monitoring system utilizing power stored by capacitor
JP5618024B2 (en) * 2012-02-22 2014-11-05 パナソニック株式会社 Backup power supply and car equipped with it
CN103731030A (en) * 2012-10-15 2014-04-16 产晶积体电路股份有限公司 Synchronous rectification buck-boost converter
CN109217450B (en) * 2017-07-04 2020-11-03 康舒科技股份有限公司 Redundant power supply system capable of prolonging maintenance time after power failure
CN107425580B (en) * 2017-09-13 2023-06-27 重庆大及电子科技有限公司 Charging and discharging circuit based on comparator

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5852358A (en) * 1996-12-11 1998-12-22 The Texas A&M University System Capactive power circuit
US6362979B1 (en) * 2000-09-29 2002-03-26 Jeff Gucyski Switching power amplifier and uninterruptible power system comprising DC/DC converter for providing sinusoidal output
JP2004512798A (en) * 2000-10-27 2004-04-22 コーニンクレッカ　フィリップス　エレクトロニクス　エヌ　ヴィ Converter control
US6522110B1 (en) * 2001-10-23 2003-02-18 Texas Instruments Incorporated Multiple output switching regulator
AU2003268647A1 (en) * 2003-09-18 2005-04-11 Hitachi Car Engineering Co., Ltd. Backup circuit

Also Published As

Publication number Publication date
CN101232201A (en) 2008-07-30
HK1121295A1 (en) 2009-04-17
CA2567562C (en) 2010-01-12
CN101232201B (en) 2013-01-02

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Effective date: 20171110