WO2002087051A1 - Alimentation electrique - Google Patents

Alimentation electrique Download PDF

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Publication number
WO2002087051A1
WO2002087051A1 PCT/GB2002/001736 GB0201736W WO02087051A1 WO 2002087051 A1 WO2002087051 A1 WO 2002087051A1 GB 0201736 W GB0201736 W GB 0201736W WO 02087051 A1 WO02087051 A1 WO 02087051A1
Authority
WO
WIPO (PCT)
Prior art keywords
generator
capacitor
power supply
circuit
supply according
Prior art date
Application number
PCT/GB2002/001736
Other languages
English (en)
Inventor
Howard Atkin
Original Assignee
Atkin Design And Development Limited
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 Atkin Design And Development Limited filed Critical Atkin Design And Development Limited
Priority to GB0325094A priority Critical patent/GB2392789A/en
Publication of WO2002087051A1 publication Critical patent/WO2002087051A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/16—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for capacitors
    • 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
    • H02J7/32—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/46—Accumulators structurally combined with charging apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to an electrical power supply for a portable appliance.
  • GB-A-2262324 in the name of Trevor Baylis describes a portable, manually powered electrical generator that may be used to power a radio.
  • a metal band spring is wound up by means of a key, the spring storing potential energy which is converted to electrical energy by means of an electrical generator that is driven as the spring unwinds.
  • the generator output is used to charge up a rechargeable battery, and commercially available embodiments of the described device incorporate just such a rechargeable battery.
  • such an arrangement does not obviate the need for a battery, although it does obviate the need for a mains electricity supply to charge the battery.
  • GB-A-2262324 also proposes the use of an electrical storage device in the form of a capacitor to smooth the output of the generator and thereby to achieve a substantially constant output.
  • the capacitor may also provide an output when, momentarily, there is not generation of power, for example because the spring of the generator has unwound. In such circumstances, the capacitor would enable the spring to be wound up again without any interruption of electricity supply during the wind up process.
  • a capacitor could be used as the main source of electrical power in such a spring-powered device.
  • US-A-4596933 describes a manually driven electrical generator for powering a Geiger Muller radiation detector.
  • An alternator is driven by repeatedly squeezing a lever, displacement of the lever driving the alternator which generates an AC output voltage which is converted to a DC voltage.
  • the DC voltage is used to drive current into a storage capacitor.
  • the capacitor provides the main power source for the radiation detector.
  • the output of the capacitor is regulated by a voltage regulator, which regulates the voltage to approximately 3.5 volts. That voltage is then multiplied up to 500 volts to energise a detector tube. With such an arrangement, energy storage is relatively inefficient as approximately 25% of the charge available is inaccessible as soon as the voltage across the capacitor has dropped to 3.5 volts.
  • the output voltage of the capacitor is multiplied, this is not to supply a low voltage load, but rather for the specific purpose of supplying a high voltage device, that is the detector tube.
  • the described device does rely upon a capacitor for its main power supply, this is in a very specific application which would not be appropriate for a portable appliance of the type in which most batteries are currently used.
  • the capacitor could deliver a stable low voltage output over a prolonged period as would be required for example in the case of a power supply capable of powering a radio.
  • the described device relies upon a 0.22 farad capacitor for energy storage, a storage capacity which would be totally inadequate for powering most appliances including for any appreciable length of time.
  • Bicycle lighting systems are known in which a simple generator is driven by rotation of a bicycle wheel, the generator output being used to energise a bicycle light.
  • a problem with such devices is that when the bicycle is stationary no power is being generated and the bicycle is therefore hard to see at night when it is stationary. It has been proposed to store a small amount of energy supplied by a generator in a built in capacitor.
  • a capacitor In one known device a capacitor is fully charged after 3 minutes cycling at a speed of 20km per hour.
  • the generator normally supplies an incandescent filament light, but at low speeds and when stationary the capacitor supplies an additionally installed light emitting diode (LED).
  • LED light emitting diode
  • the light can be switched off rapidly by simply discharging the capacitor using for example a coin to bridge two exterior contact pins, thereby shorting out the capacitor.
  • the amount of energy stored is relatively low, as indicated by the fact that rapid discharge of the capacitor is acceptable, but in the particular application of a bicycle lighting system this is nevertheless useful.
  • Capacitors are now available which are capable of storing a large amount of energy in a small volume, for example a volume such as that defined by a domestic appliance. Such capacitors which are generally electrochemical capacitors will be referred to below as supercapacitors.
  • Supercapacitors are available with a capacity of for example in excess of 100 farads. The amount of energy that such a capacitor can store is however potentially dangerous as if such a capacitor was shorted out the energy released would result in a safety hazard.
  • Such supercapacitors have been used in extreme circumstances, for example in military aircraft as described in US-A- 5914522, but such devices have not generally been thought appropriate for use in portable appliances.
  • EP-A-0718951 shows the use of an electrochemical capacitor which serves as a voltage source for a device such as a mobile phone.
  • the capacitor however is used as a temporary charge storage device, charge being supplied to the capacitor from an electrochemical battery via an inductor. No suggestion is made that the main power source for such a portable device could be a capacitor.
  • electrochemical capacitors The state of the art with regard to electrochemical capacitors is set out in the paper "Principles and Applications of Electrochemical Capacitors" by R. Katz and M. Carlen, Electrochemica Acta, 45(2000), 2483-2498. This paper explains how electrochemical capacitors can be used in high power applications, for example hybrid electric vehicles, and low power applications, for example to deliver short term pulses of current to improve the power output and increase the life of a rechargeable battery in a cellular phone, or to achieve higher rates of short-term acceleration in a toy car. There is no suggestion however that electrochemical capacitors could be used to power portable appliances over large periods, measured in for example hours rather than seconds or minutes. Most current batteries are used for applications in which operation over such longer periods is required.
  • capacitors as the sole power source for portable appliances such as radios where a relatively low voltage power source is required which can energise the appliance over a relatively long period of time measured in many thousands of seconds rather than less than one hundred seconds. It may be that this reluctance to contemplate the use of high capacitance capacitors for the sole power source of portable appliances is related to the known risks associated with high currents experienced in both charging and discharging capacitors of high capacitance. Whereas appropriate measures may be taken to reduce such risks to an acceptable level in for example power supplies for vehicles where users might be expected to approach power sources with some caution such caution cannot be expected from users of domestic appliances which are assumed to be inherently safe.
  • an electrical power supply for a portable appliance comprising a generator for generating a DC voltage and a capacitor arranged to be charged by the generator to provide the sole source of stored energy for powering the appliance, wherein the power supply comprises a limiting circuit arranged to limit the rate at which power is transferred from the generator to the capacitor.
  • the limiting circuit limits the rate at which power is transferred from the generator to the capacitor, currents which would be damaging to the structure are avoided.
  • the generator is manually drive the resistance to the manually applied force is limited.
  • the initial current into the capacitor is limited to a level at which the reactive effect of the generator is limited.
  • the force that can be applied to a gear box mechanism such as a gearbox which is used to drive the generator from a manually actuable member is therefore limited.
  • a user is not tempted therefore to apply a large force to the manually actuable member to overcome the reactive force. Relatively simple and cheap to manufacture mechanisms can be used in the generator driving mechanism.
  • the generator is energised from a mains power supply, the output current of the generator is limited to prevent the generation of dangerous currents and voltages in the system.
  • the limiting circuit may comprise a switching circuit such as a buck converter operable to limit current delivered by the generator.
  • the switching circuit may be disabled unless the generator delivers a predetermined minimum voltage, thus ensuring that starting torque on any manually driven generator is suppressed.
  • the capacitor is connected in series with a circuit for limiting the output current of the capacitor.
  • the output current limiting circuit may comprise a series diode which is forward biased when the capacitor is being charged and is connected in parallel with a resistor through which the capacitor is discharged.
  • the parallel resistor may have a positive temperature coefficient.
  • a simple over current fuse may also be provided in series with the capacitor to ensure that dangerous output currents cannot be generated.
  • the over current fuse could be of a type which is permanently destroyed by over current or is automatically reset after the over current has been removed.
  • Figure 1 is a schematic illustration of a power supply incorporating an integral manually operated generator
  • Figure 2 shows a power supply which can be charged by inserting it into a device incorporating a manually driven generator
  • Figure 3 illustrates a power supply incorporating an integral electrically powered generator
  • Figure 4 shows a power supply which may be charged by connection to a separate electrically powered generator
  • FIG. 5 illustrates a radio having a casing within which is enclosed a power supply in accordance with the present invention inco ⁇ orating an integral manually driven generator
  • Figure 6 illustrates a radio similar to that of Figure 5 but with a separable manually powered generator
  • Figure 7 illustrates a radio similar to that of Figure 5 but with an integral electrically powered generator
  • Figure 8 illustrates a radio similar to that of Figure 5 but with a separable electrically powered generator
  • Figure 9 is a schematic representation of a circuit which may be used in accordance with the present invention.
  • FIG. 10 is a circuit diagram of a charging current limiting circuit for use in a power supply in accordance with the present invention.
  • FIG. 11 is a circuit diagram of a discharge current limiting circuit for use in a power supply in accordance with the present invention.
  • the illustrated power supply is structured so it can be a simple direct replacement for a conventional battery or series of batteries arranged end to end. Accordingly the power supply defines a first terminal 1 the size and disposition of which corresponds to the positive terminal of a conventional battery and a second terminal 2 the size and disposition of which corresponds to the negative terminal of a conventional battery.
  • the power supply delivers a DC output between terminals 1 and 2.
  • the terminals 1 and 2 are mounted on a fixed casing 3 housing supercapacitors 4 and a control circuit 5.
  • a DC generator 6 is housed within a rotatable cap 7 supported on the casing 3. In use, the power supply is charged by holding the casing 3 in one hand and rotating the cap 7 with the other.
  • An appropriate gear mechanism (not shown) drives the generator which delivers a DC voltage via a rectifier to the control circuit 5.
  • the control circuit 5 distributes energy to the capacitors 4. After charging, the power supply can then be inserted into an appliance, for example a torch, and used in exactly the same manner as in the case of a conventional battery or series of batteries.
  • the control circuit 5 also controls the rate at which charge can be discharged from the capacitors 4. For example, if the power supply is to be used in a flashlight, the control circuit 5 will deliver a constant current output.
  • the capacitors 4 may be connected in series and together may have a capacitance of 100 farads or more. This presents two potential problems, that is firstly the rate at which current can be delivered to the capacitors and secondly the rate at which current can be drawn from the capacitors.
  • control circuit 5 inco ⁇ orates circuitry which limits the maximum rate at which current can be drawn from the capacitors 4.
  • the control circuit could inco ⁇ orate active elements which limit the maximum output current and prevent short circuiting of the capacitors.
  • control circuit 5 could inco ⁇ orate a simple fuse device which is destroyed if current from the capacitors exceeds a predetermined limit. Referring to Figure 2, this shows an arrangement similar to that of Figure 1 but in which the generator 6 has been inco ⁇ orated in a separate charger having a frame 8 supporting terminals 9 and 10.
  • a power supply to be charged could be inserted into the frame 8 so as to deliver DC current from the generator 6 via the terminals 1 and 2 to the capacitors 4.
  • the generator 6 is not inco ⁇ orated in the power supply itself but rather is inco ⁇ orated in a separate charging device, there is more available space to receive capacitors in the device which replaces the batteries of the appliance and thus four rather than three capacitors are provided.
  • the control circuit 5 inco ⁇ orates circuitry limiting the maximum rate at which current can be drawn from the capacitors 4.
  • FIG 3 shows a similar arrangement to that of Figure 1 except for the fact that the manually driven generator 6 has been replaced by an electrically powered generator 11 which may be connected by a separable cable 12 and a plug 13 to a conventional main socket.
  • the generator 11 could be for example a conventional transformer and rectifier to produce an appropriate DC voltage for distribution through the control circuit 5 to the capacitors 4. Again the control circuit 5 would inco ⁇ orate output current limiting circuitry.
  • FIG 4 shows an arrangement similar to that of Figure 3 but in which the generator 11 is a transformer which is a separate component from the casing 3 and may be connected to the casing by a separable cable 14. Separation of the transformer 11 in this manner leaves more of the available space free to receive a third capacitor 4.
  • FIG. 1 to 4 are intended for use as replacements for conventional electrochemical batteries, enabling embodiments of the invention to be used to power the multitude of appliances already in existence which currently rely upon batteries.
  • FIGS 5 to 8 show how the invention can be applied by building the invention into the casing of an otherwise conventional appliance.
  • each of Figures 5 to 8 shows a casing 15, that is the casing of a radio, within which capacitors 16 and a control circuit 17 are housed.
  • a generator 18 for charging up the capacitors 16.
  • the generator comprises an alternator which is built into the casing 15 and can be driven by rotation of a hand wheel 19.
  • the generator is a separable unit driven by a hand wheel 19 which may be plug-engaged in a socket 20 defined by the casing 15.
  • the casing 15 encloses a transformer 18 which may be powered via a separable cable 20 from a plug 21.
  • the generator comprises a transformer 18 connected by a cable 20 to a plug 21 and connectable by a separable cable 22 to the appliance casing 15.
  • the control circuit 17 controls both the distribution of power to the capacitors 16 and the distribution of power from the capacitors 16.
  • the capacitors 16 and control circuit 17 will be housed in an enclosure preventing direct access by a user. This enclosure could be the casing 15 itself, or an interior housing within the casing 15.
  • the control circuit 17 will inco ⁇ orate circuitry to limit the maximum current drawn from the capacitors 16.
  • FIG. 9 this illustrates in general terms an electrical circuit which may be inco ⁇ orated in embodiments of the present invention.
  • the illustrated circuit comprises a generator 23 connected in series with a charging current limiting circuit 24 and an isolating switch 25. If the isolating switch 25 is opened, current cannot be delivered from the generator 23 to the rest of the circuit.
  • a supercapacitor 26 is connected in series with a discharging current limiting circuit 27, a load 28 (for example a transistorised radio) and an on-off switch 29. During charging the switch 25 will be closed such that current from the generator 23 can pass through the charging current limiting circuit 24 and the switch 25 into the capacitor 26.
  • the switch 30 When the radio is in use, the switch 30 is closed such that current can pass from the capacitor 26 through the discharging current limiting circuit 27 and the load 28.
  • the switches 25 and 29 may be physically coupled together so that only one can be closed at any time or may be configured such that only one or other switch is opened automatically in dependence upon the voltage produced by the generator 23.
  • the illustrated charging current limiter comprises a buck converter built around a proprietary chip 29, that is the Maxim 724 Step Down, Pulse Width Modulated, Switch-Mode DC Regulator. That product is available from Maxim Integrated Products of Sunnyvale, California 94086, USA.
  • a feedback circuit 31 maintains a substantially constant current supply to the capacitor 26 and an input circuit 32 ensures that the circuit 30 is switched off until a predetermined input voltage has been delivered.
  • the generator 23 comprises a manually driven rotor and stator assembly 33 producing a three-phase AC output which is converted to a DC voltage by a diode bridge 34.
  • the current limiter circuit 24 of Figure 10 matches a variable output voltage from the generator to the voltage of the capacitor 26 which rises as current flows into it. Torque fed back to the generator is proportional to the current flowing in the generator. The current delivered to the capacitor 26 is proportional to the difference between the voltage already accumulated on the capacitor and the voltage being generated by the generator. Power losses in the charging circuit are defined by the cumulative resistance in the charging circuit and the voltage generated by the generator.
  • the core of the buck converter is formed by an inductor 35, a diode 36 and the switching chip 30.
  • the chip 30 is turned on and off repetitively, at frequencies generally in the range of 20 kHz to 1 MHz. There is little power loss either when the switch is on or off as there is either no current flowing or minimal voltage across the switch.
  • the inductor 35 opposes changes in the current. Thus at the beginning of each cycle the switch is turned on and the current in the inductor 35 rises. When the current reaches a preset level, or after a preset time, the switch 30 is turned off and the inductor 35 is discharged into the capacitor 26 via the diode 36.
  • a feedback voltage can either drive the frequency of a fixed pulse width or pulse width modulation may be used.
  • the circuit operates as a constant current dropper circuit.
  • the feedback voltage to terminal FB is generated across a low value sense resistor 37 in series with a smoothing capacitor 38.
  • An operational amplifier 39 (type LM358) is added to the feedback loop to match the sense voltage to the feedback voltage level of the integrated switching circuit 30.
  • a xener diode 40 is provided in order to prevent the circuit from delivering charging current as soon as the capacitor 26 is fully charged.
  • the circuit 32 suppresses the maximum starting torque which can be applied to the generator 33.
  • the circuit 32 effectively switches off the switching circuit 30 until the generator is up to a predetermined speed. This is achieved by pulling the compensation pin (Vc) of the switching circuit 30 low using an open collector transistor 41. This provides a low torque start up with easy transition to charging current generation.
  • this illustrates a simple circuit which can be inco ⁇ orated as the current limiting circuit 27 of Figures 9 and 10.
  • the circuit of Figure 11 comprising a diode 42 the polarity of which is such that the diode 42 is forward biased during charging of the capacitor 26 and reverse biased during discharge of the capacitor 26 through the load 28.
  • a resistor 43 is connected in parallel with the diode 42.
  • the value of the resistor will be selected to set a maximum limit on the rate of discharge of the capacitor 26.
  • the resistor 43 will have a positive temperature coefficient of resistance such that if for example the capacitor 26 is shorted out the discharge current will rapidly be limited as a result of heating of the resistor 43.
  • a fuse (not shown) may be connected between the circuit of Figure 11 and the capacitor 26.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Power Sources (AREA)
  • Direct Current Feeding And Distribution (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

La présente invention concerne une alimentation électrique destinée à un appareil portatif tel qu'une radio. Selon l'invention, un génératrice, par exemple une génératrice à fonctionnement manuel, est conçue pour produire une tension en courant continu. Une supercapacité est agencée pour être chargée par la génératrice. Un circuit de limitation limite la vitesse à laquelle l'énergie est transférée vers la supercapacité. La capacité constitue la seule source d'énergie de l'appareil. La capacité est reliée à un circuit de régulation conçu pour limiter le courant s'écoulant vers la capacité et en provenance de celle-ci. La capacité et le circuit de régulation sont enfermés dans un boîtier qui empêche que la capacité se décharge autrement qu'à travers le circuit de régulation.
PCT/GB2002/001736 2001-04-19 2002-04-17 Alimentation electrique WO2002087051A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0325094A GB2392789A (en) 2001-04-19 2002-04-17 Electrical power supply

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0109743.5A GB0109743D0 (en) 2001-04-19 2001-04-19 Electrical power supply
GB0109743.5 2001-04-19

Publications (1)

Publication Number Publication Date
WO2002087051A1 true WO2002087051A1 (fr) 2002-10-31

Family

ID=9913152

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2002/001736 WO2002087051A1 (fr) 2001-04-19 2002-04-17 Alimentation electrique

Country Status (2)

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GB (2) GB0109743D0 (fr)
WO (1) WO2002087051A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7732939B2 (en) 2007-03-21 2010-06-08 Honeywell International Inc. Multi-functional LRM performing SSPC and ELCU functions
US7750606B2 (en) 2007-10-04 2010-07-06 Honeywell International Inc. Method of charging and discharging of supercapacitors without the use of converters or chargers
CN102097788A (zh) * 2010-12-08 2011-06-15 上海申瑞电力科技股份有限公司 储能电容保护电路
US8050806B2 (en) 2007-03-21 2011-11-01 Honeywell International Inc. Ground fault interruption using DSP based SSPC module
EP3202462A1 (fr) * 2016-02-08 2017-08-09 RAS Technology Sàrl Dispositif pour gonfler un sac gonflable, système de sécurité à avalanche et sac à dos avec un tel dispositif et utilisation
CN109071031A (zh) * 2016-07-22 2018-12-21 深圳市大疆创新科技有限公司 向无人机提供电力的方法和系统
CN113821100A (zh) * 2021-11-22 2021-12-21 长沙理工大学 一种电子设备掉电保护装置及方法、电子设备
WO2022043642A1 (fr) * 2020-08-27 2022-03-03 Giokabari Tombari Alimentation électrique entraînée par manivelle

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Publication number Priority date Publication date Assignee Title
US5289104A (en) * 1992-07-09 1994-02-22 Lin Pi Chu Battery charging device
GB2312999A (en) * 1996-05-09 1997-11-12 Nec Corp Portable power supply
US5828207A (en) * 1993-04-20 1998-10-27 The United States Of America As Represented By The Secretary Of The Navy Hold-up circuit with safety discharge for preventing shut-down by momentary power interruption
JPH1175344A (ja) * 1997-08-29 1999-03-16 Sony Corp 手動発電機付きラジオ受信機
JPH11289714A (ja) * 1998-03-31 1999-10-19 Nippon Chemicon Corp 手動発電機
US6016016A (en) * 1997-05-31 2000-01-18 Luftansa Technik Ag Voltage supply apparatus
US6097584A (en) * 1998-01-27 2000-08-01 Sextant Avionique Reserve d.c. power device
US6204645B1 (en) * 1998-09-11 2001-03-20 Richard A. Cullen Battery charging controller

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Publication number Priority date Publication date Assignee Title
US5289104A (en) * 1992-07-09 1994-02-22 Lin Pi Chu Battery charging device
US5828207A (en) * 1993-04-20 1998-10-27 The United States Of America As Represented By The Secretary Of The Navy Hold-up circuit with safety discharge for preventing shut-down by momentary power interruption
GB2312999A (en) * 1996-05-09 1997-11-12 Nec Corp Portable power supply
US6016016A (en) * 1997-05-31 2000-01-18 Luftansa Technik Ag Voltage supply apparatus
JPH1175344A (ja) * 1997-08-29 1999-03-16 Sony Corp 手動発電機付きラジオ受信機
US6097584A (en) * 1998-01-27 2000-08-01 Sextant Avionique Reserve d.c. power device
JPH11289714A (ja) * 1998-03-31 1999-10-19 Nippon Chemicon Corp 手動発電機
US6204645B1 (en) * 1998-09-11 2001-03-20 Richard A. Cullen Battery charging controller

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Title
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PATENT ABSTRACTS OF JAPAN vol. 2000, no. 01 31 January 2000 (2000-01-31) *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7732939B2 (en) 2007-03-21 2010-06-08 Honeywell International Inc. Multi-functional LRM performing SSPC and ELCU functions
US8050806B2 (en) 2007-03-21 2011-11-01 Honeywell International Inc. Ground fault interruption using DSP based SSPC module
US7750606B2 (en) 2007-10-04 2010-07-06 Honeywell International Inc. Method of charging and discharging of supercapacitors without the use of converters or chargers
CN102097788A (zh) * 2010-12-08 2011-06-15 上海申瑞电力科技股份有限公司 储能电容保护电路
EP3202462A1 (fr) * 2016-02-08 2017-08-09 RAS Technology Sàrl Dispositif pour gonfler un sac gonflable, système de sécurité à avalanche et sac à dos avec un tel dispositif et utilisation
WO2017137244A1 (fr) * 2016-02-08 2017-08-17 Ras Technology Sàrl Dispositif permettant de gonfler un sac gonflable, système de sécurité d'avalanche et sac à dos comportant ledit dispositif et utilisation
CN109071031A (zh) * 2016-07-22 2018-12-21 深圳市大疆创新科技有限公司 向无人机提供电力的方法和系统
WO2022043642A1 (fr) * 2020-08-27 2022-03-03 Giokabari Tombari Alimentation électrique entraînée par manivelle
CN113821100A (zh) * 2021-11-22 2021-12-21 长沙理工大学 一种电子设备掉电保护装置及方法、电子设备

Also Published As

Publication number Publication date
GB0325094D0 (en) 2003-12-03
GB2392789A (en) 2004-03-10
GB0109743D0 (en) 2001-06-13

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