WO2003041189A2 - Procede et dispositif d'alimentation en energie electrique d'un appareil - Google Patents

Procede et dispositif d'alimentation en energie electrique d'un appareil Download PDF

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Publication number
WO2003041189A2
WO2003041189A2 PCT/FR2002/003841 FR0203841W WO03041189A2 WO 2003041189 A2 WO2003041189 A2 WO 2003041189A2 FR 0203841 W FR0203841 W FR 0203841W WO 03041189 A2 WO03041189 A2 WO 03041189A2
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WO
WIPO (PCT)
Prior art keywords
circuit
voltage
battery
storage means
electrical energy
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.)
Ceased
Application number
PCT/FR2002/003841
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English (en)
French (fr)
Other versions
WO2003041189A3 (fr
Inventor
Didier Marquet
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.)
Orange SA
Original Assignee
France Telecom SA
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 France Telecom SA filed Critical France Telecom SA
Priority to EP02793218.5A priority Critical patent/EP1446855B1/fr
Priority to JP2003543121A priority patent/JP4261358B2/ja
Priority to AU2002358880A priority patent/AU2002358880A1/en
Priority to US10/494,918 priority patent/US7408272B2/en
Publication of WO2003041189A2 publication Critical patent/WO2003041189A2/fr
Publication of WO2003041189A3 publication Critical patent/WO2003041189A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • 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
    • H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/10—Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from AC or DC
    • 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
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter
    • 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
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/40—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries adapted for charging from various sources, e.g. AC, DC or multivoltage

Definitions

  • the present invention relates to a portable electrical power supply device, making it possible in particular to power an appliance such as a portable telephone.
  • the device's battery will only be partially charged.
  • a cord for plugging it into a cigarette lighter socket of a motor vehicle which allows it to be powered from the vehicle battery.
  • the user does not always have his vehicle available or even not always long enough to recharge the battery of his device.
  • the invention aims to at least partially overcome the drawbacks of the prior art.
  • a first object of the invention is to facilitate the supply or recharging of an electrical device in the presence of different sources of electrical energy.
  • Another object of the invention is to extend the autonomy of electrical devices incorporating a rechargeable supply battery.
  • Yet another object of the invention is to confer satisfactory autonomy on such devices despite limited availability times of the mains supply or the like.
  • the invention provides a portable electrical power supply device, comprising:
  • connection means for connecting an appliance to be supplied; and - a supply circuit supplying an output supply voltage for the device when the circuit is optionally connected to a mains supply or to a low voltage electrical energy source.
  • low voltage means a voltage less than or equal to preferably 60 volts, more advantageously 40 volts, or even 28 volts.
  • the device is preferably designed to accept any low voltage as input, ranging in the range from 3 to 60 volts, for example. Alternatively, it can be provided for one or more predefined low voltages such as 6 Volts, 12 Volts and 24 Volts.
  • the invention is particularly suitable for supplying a device having a low voltage supply input, for example 6 Volts, 9Volts or 12 Volts. It will be understood that in the context of the invention, the power supply input of the device can be used depending on the device: - to directly power the device to make it work - that is to say without use its battery as a buffer - but not to recharge its battery; or
  • the battery can be charged by the device whether the battery is in the device or that the battery has been previously removed from the device to the charging operation.
  • the circuit comprises a voltage converter supplying at the output a given voltage used to supply the device, when the circuit is connected to a low voltage electrical energy source. But if the circuit is connected to a low-voltage electrical energy source having a voltage within a predetermined voltage range including the voltage supplied by the converter, then the circuit supplies the connected device by means of connection from the source of electrical energy without the intermediary of the converter.
  • the device comprises a means for storing rechargeable electrical energy and in which:
  • the circuit charges the energy storage means when the circuit is connected to an appropriate source of electrical energy; and -
  • the connection means makes it possible to supply the device from the energy storage means.
  • the device makes it possible to supply the device with the storage means at least partially charged, even if the charger circuit is no longer connected to the source of electrical energy used to charge it.
  • the capacity of the storage means is chosen to be able to supply the device preferably for at least half an hour, but more advantageously for at least one hour, or even two hours.
  • the capacity of the storage means is at least equal to the storage capacity of the appliance battery, or at least half of the latter. .
  • the circuit can ultra-rapidly charge the energy storage means when the circuit is connected to an appropriate source of electrical energy.
  • the ultra-rapid charge of the storage means corresponds to the electric charge of the storage means at least 50% of its storage capacity carried out in less than half an hour, preferably in less than a quarter of an hour and more advantageously in less than 8 minutes.
  • the device thus allows rapid recharging of its storage means even when the source of electrical energy is only available for a few minutes such as for example a businessman passing through his hotel room for a few minutes between two appointments you outside.
  • the device makes it possible to power the device subsequently in the absence of any other source of energy. Since it is portable, the user can take the device with him to power his device in any place.
  • the electrical energy storage means can comprise a rechargeable battery.
  • the capacity of the rechargeable battery is preferably less than or equal to three times, more advantageously twice, or even once and half the storage capacity of the device's battery, which allows a compactness and a limited weight of the device thus improving its portability.
  • the electrical energy storage means comprises a rechargeable battery and the latter comprises several accumulator cells connected in series when the battery supplies the device connected by means of connection, each cell of the battery being charged with ultra-fast through a respective charge control circuit.
  • the circuit comprises a voltage converter supplying at the output a given voltage used for charging - possibly ultra-fast - the energy storage means, when the circuit is connected to a low electrical energy source voltage, and the energy storage means supplies the device connected to the connection means via the converter operating as a voltage step-up when the voltage across the terminals of the energy storage means is less than a predetermined threshold.
  • the circuit when the circuit is connected to a low-voltage electrical energy source having a voltage included in a predetermined voltage range including the voltage supplied by the converter, the circuit supplies the device connected to the connection means, and / or charge the energy storage means, from the electrical energy source without the intermediary of the converter.
  • the circuit comprises a voltage converter supplying at the output a given voltage used for charging the energy storage means and / or for supplying the device connected to the connection means, when the circuit is connected to a low voltage electrical power source. But when the circuit is connected to a low-voltage electrical energy source having a voltage within a predetermined voltage range including the voltage supplied by the converter, then the circuit supplies the connected device by means of connection and / or loads the energy storage means, from the source of electrical energy without the intermediary of the converter.
  • the circuit when the circuit is connected to a source of electrical energy having a voltage below a predetermined threshold, the circuit supplies the connected device with connection means, but does not charge the storage means energy.
  • the device can advantageously include a circuit limiting the current supplied to the device.
  • the device may further include a solar panel for powering the device and / or charging the energy storage means.
  • the device comprises connection means for connecting a removable and portable electrical energy storage means in which, when said removable electrical energy storage means is connected to said connection means, the supply circuit ultra-rapidly charges the removable energy storage means when the supply circuit is connected to an appropriate source of electrical energy.
  • the device may or may not include other non-removable storage means as described above.
  • the removable energy storage means may include a rechargeable battery. The removable storage means thus charged can be disconnected from the device and then makes it possible to supply a device - for example to recharge the battery of the device if it has one - in the absence of any other source of energy. Since it is portable, the user can take the removable storage medium with him to power his device in any place.
  • the preferential indications concerning the choice of the capacity of the energy storage means of the device given above also apply to the removable storage means.
  • the invention also proposes the use of the device of the invention to power an electrical appliance.
  • the device is preferably of portable type, advantageously a portable telephone or a portable computer or a pocket electronic diary.
  • An advantageous use lies in the fact that the device of the invention recharges a supply battery (2) of the electrical appliance.
  • the charging of an energy storage means of the invention can be implemented independently of the fact that the device of the invention can be connected at the input as desired to a mains supply and to a source of low voltage electrical energy.
  • the invention also provides a method for supplying electrical energy to an appliance comprising a supply battery and a supply input. The method comprises the steps of: a) ultra-rapid charging of a portable type rechargeable electrical energy storage means; and b) connection of the energy storage means to the power input of the device.
  • the storage means preferably comprises a rechargeable battery.
  • the ultra-rapid charge of the storage means corresponds to the electric charge of the storage means at least 50% of its storage capacity carried out in less than half an hour, preferably in less than a quarter of an hour and more advantageously in less than 8 minutes.
  • the ultra-fast charging of the storage means is generally carried out using a source of electrical energy.
  • the method according to the invention makes it possible to supply the device with the storage means at least partially charged, even if the latter is no longer connected to the source of electrical energy used to charge it.
  • the capacity of the storage means is chosen to be able to supply the device preferably for at least half an hour, but more advantageously for at least one hour, or even two hours.
  • the invention makes it possible to recharge the storage means in situations where the source of electrical energy is available for a short time, for example, a businessman passing through his hotel room for a few minutes between two meetings. outside.
  • the storage means thus loaded then makes it possible to supply its device in the absence of any other source of energy. Since it is portable, the user can take the storage medium with him to power his device in any place.
  • the invention is particularly suitable for supplying a device having a low voltage supply input, for example 6 Volts, 9Volts or 12 Volts.
  • the invention is all the more advantageous when the supply battery of the device and / or the device itself is not designed to allow ultra-rapid charging of this battery.
  • the storage means provides a significant autonomy compared to the power supply battery of the device, when the charging time is limited by the circumstances.
  • devices incorporating a supply battery - such as telephones or laptops - do not allow ultra-rapid recharging of the latter.
  • neither the device's circuits, nor the battery itself can withstand the high currents - generally several amps - necessary for such an ultra-fast charge.
  • These devices generally require at least an hour, and very often at least three hours, if not more, to recharge their batteries.
  • the power supply input of the device can be used depending on the device: - to directly power the device to make it work - that is to say without use its battery as a buffer - but not to recharge its battery; or
  • the energy storage means can be used to recharge the supply battery of the device.
  • the capacity of the storage means is at least equal to the storage capacity of the battery of the device, or at least half of the latter.
  • the storage means then makes it possible to significantly recharge the battery of the device.
  • the capacity of the storage means especially if it comprises a rechargeable battery, is preferably less than or equal to three times, more advantageously twice, or even one and a half times the storage capacity of the battery. 'device, which allows compactness and limited weight thus improving its portability.
  • This embodiment of the invention is there again particularly advantageous when the supply battery of the device and / or the device itself is not designed to allow ultra-rapid charging of its battery.
  • This embodiment allows charging of the storage means even if the source of electrical energy - for example the sector or a cigarette lighter socket of a car - is available only a few minutes. Because it is portable, the user can take the storage means with him to recharge thanks to it the battery of his device even when he no longer has access to the source of electrical energy .
  • the energy storage means is connected to the power supply input of the device via a circuit limiting the current supplied At the phone.
  • This limiter circuit protects the device in particular against overcurrents which could damage it.
  • step a) the charging of the energy storage means is carried out using a charger provided to be connected either to a mains supply or to a low voltage electrical power source.
  • low voltage means a voltage less than or equal to 60 volts.
  • step a) the charging of the energy storage means is carried out using a charger also provided for supplying the device. It is thus possible to simultaneously charge the storage means and supply the device, as well as to charge the battery of the latter if necessary.
  • the device to be powered is preferably of the portable type. It can advantageously be a mobile phone or a laptop or a pocket electronic agenda.
  • the invention also proposes a portable electrical power supply device, comprising:
  • connection means making it possible to connect a device to supply it from the energy storage means.
  • the device according to the invention enables the device to be powered by means of storage means at least partially charged, even if the charger circuit is no longer connected to the source of electrical energy used to charge it.
  • the capacity of the storage means is chosen to be able to supply the device preferably for at least half an hour, but more advantageously for at least one hour, or even two hours.
  • this device allows rapid recharging of its storage means even when the electric power source is only available for a few minutes, the device making it possible to supply the device by the following in the absence of any other source of energy.
  • the means for storing electrical energy comprises a rechargeable battery.
  • the battery can comprise several accumulator cells connected in series when the battery supplies the device connected by means of connection, and each cell can advantageously be charged very quickly through a respective charge control circuit.
  • the charger circuit supplies the device connected by means of connection, when the charger circuit is connected to the source of electrical energy.
  • the charger circuit is able to be connected either to a mains supply or to a low voltage supply.
  • the charger circuit comprises a voltage converter supplying at the output a given voltage used for the ultra-rapid charging of the energy storage means, when the device is connected to an energy source electric low voltage, and in that the energy storage means supplies the device connected to the connection means via the converter operating as a step-up voltage when the voltage across the terminals of the energy storage means is less than a predetermined threshold.
  • the charger circuit when the charger circuit is connected to a low-voltage electrical energy source having a voltage within a predetermined voltage range including the voltage supplied at the output converter, the charger circuit supplies the device connected by means of connection, and / or charges the energy storage means, from the electrical energy source without the intermediary of the converter.
  • the charger circuit when the charger circuit is connected to a source of electrical energy having a voltage below a predetermined threshold, the charger circuit supplies the device connected by means of connection, but does not charge not the means of energy storage.
  • the invention has the advantage of not requiring modifications to the electrical devices to be supplied, in particular the physical connection interface serving as a power input for the devices. Therefore, the invention can be implemented for any existing electrical appliance.
  • Figure 1 shows the block diagram of a power supply according to the invention, intended to recharge the battery of a mobile phone.
  • FIG. 2 represents a variant of the supply of FIG. 1.
  • FIG. 3 represents a variant of the supply of FIG. 2.
  • FIG. 4 represents a variant of the supply of FIG. 3.
  • FIG. 5 represents a variant of the supply of FIG. 2 which allows individual control of the charge of each accumulator cell constituting the battery equipping this supply.
  • the power supply of the embodiment of Figure 1 is not intended to be connected to a low voltage source, but only to a mains supply.
  • the power supply 5 illustrated in FIG. 1 is intended to be used with a portable telephone 1.
  • the portable telephone 1 can be of any known type. Conventionally, it is powered by a rechargeable battery 2 which is housed in its housing.
  • the telephone case 1 is generally provided with a connector 3 used to recharge the battery 2 through a control circuit 4.
  • the control circuit 4 is used in particular to check the charge level of the battery 2 to inform the user as well as the need or not to recharge the battery 2 and / or to protect the battery 2 against misuse.
  • the recharging of the battery 2 is carried out by applying to the connector 3 a voltage of approximately 5 Volts DC which is supplied in this case by the power supply 5 according to the invention.
  • the power supply 5 includes a converter circuit 6 which supplies a DC voltage of 6 volts at the output from the sector applied to its input.
  • the converter 6 can be of any suitable conventional type. In particular, it can be a conventional supply circuit based on a transformer, a Graetz bridge and a filtering capacitor. However, it is preferable to use a switching power supply which has the advantage of being more compact and light.
  • the converter 6 is preferably provided to accept as input the alternating voltages of the mains supplies existing in the different countries, in particular 110 Volts 60 Hz and 220 to 240 Volts, 50 Hz.
  • the converter 6 can be implemented in the form of a switching power supply which automatically adapts as an input to a whole range of alternating or direct voltages covering the various mains supply voltages existing in the world.
  • the converter 6 can be provided to receive at input any voltage included in a range from 80 to 240 Volts AC - 50 or 60 Hz - or in a range from 100 to 350 Volts DC.
  • the input of the converter 6 can conventionally be connected to the mains by means of a cord 7 provided at its end with a male plug.
  • the power supply 5 includes a rechargeable battery 10.
  • the output of the converter 6 is connected to the battery 10 to recharge it when the power supply 5 is connected to the mains.
  • the converter 6 is preferably provided to carry out an ultra-rapid charge of the battery 10.
  • the battery 10 is therefore chosen to tolerate such an ultra-rapid charge and the converter 6 is designed to deliver a current sufficient to allow this charge.
  • batteries in particular of the nickel-cadnium type in sealed cylindrical form, are for example marketed by the French company Saft.
  • a circuit 11 controls the charge current applied to the battery 10.
  • the control circuit 11 has been represented symbolically in the form of a controlled switch. In practice, this control circuit 11 can be implemented in a known manner, in particular by following the prescriptions of the battery manufacturer. It could in particular be based on a MOS transistor used in switching.
  • ultrafast charging involves applying a constant high current until the voltage across the battery - or at each of its cells - reaches a predefined threshold, which generally charges the battery to about 75% of its capacity, see more. Charging can then be continued more slowly at lower currents. Generally it is It is also desirable to check the battery charge current as a function of the battery temperature. This role can also be performed by circuit 11.
  • the battery 10 is connected to a cord 8 provided at its end with a connector making it possible to connect the power supply 5 to the connector 3 of the mobile telephone 1.
  • the charge control circuit 11 can be bridged by a diode 12.
  • the diode 12 is preferably a Shottky diode because of the low voltage drop present at its terminals when it is on.
  • the battery 10 thus makes it possible to recharge the battery of the telephone 1 and / or to directly supply the telephone 1.
  • the control circuit 11 is based on a bidirectional switch, the role of the diode 12 can also be assumed by the control circuit switch 11 in which case the diode 12 is superfluous.
  • the power supply 5 preferably comprises a circuit 9 limiting the current supplied by the battery 10 to the telephone 1.
  • the current limiting circuit 9 serves to protect the mobile telephone 1 against overcurrents which could deteriorate it - this particularly during charging. from the battery 2 by the power supply 5 - because the control circuit 4 of the telephone 1 generally does not perform this function or insufficiently.
  • the current limiting circuit 9 can consist of a simple resistance. But it can also be a controlled switch - such as a MOS transistor - chopping the current as a function of the evolution of the charging current supplied to the battery 2.
  • the choice of the battery 10 with regard to its storage capacity is made in consideration of the energy consumption of the device to be supplied, in this case, in consideration of the capacity of the battery of the telephone 1.
  • the a storage capacity of the battery 10 is chosen sufficient to fully recharge the battery 2 or at least 90%.
  • the storage capacity is preferably chosen at least equal to that of the battery 2.
  • it can also be significantly greater than that of the battery of the device to be recharged to allow several charges of the latter.
  • the choice is also made in consideration of the weight and the size of the battery 10, as well as of the converter 6 which must supply a charging current which is all the more important in the case of an ultra-fast charge of the battery 10.
  • the choice of the battery 10 with regard to its voltage is made in consideration of the supply voltage required by the device to be supplied.
  • the voltage at the terminals thereof varies between 2.5 and 4.2 volts approximately depending on its charge level. Therefore, the voltage of the battery 10 is preferably chosen to be sufficient to charge the battery 2 up to 4.2 Volts, taking into account the voltage drops introduced by the intermediate elements between the battery 10 and the battery 2, that is to say in particular the diode 12, the circuit current limiter 9 and the control circuit 4.
  • a Nickel-Cadnium battery of 6 Volts - that is to say five cells of 0.9 Volt each - whose voltage varies from 4.5 Volts to 7.5 Volts approximately depending on its charge level.
  • the converter 6 is preferably chosen to deliver a voltage sufficient to fully charge the battery 10.
  • the voltage delivered by the converter 6 can be of the order of 8 or 9 Volts.
  • the supply 5 may include a circuit limiting the output voltage applied to the cord 8, this circuit possibly for example being based on a zener diode.
  • the power supply 5 can be supplemented by a voltage booster circuit to raise the voltage supplied by the battery 10 at a sufficient level.
  • the output of the converter 6 is connected to the cord 8, if necessary by means of the current limiting circuit 9 and / or the aforementioned voltage limiting circuit.
  • the converter 6 supplies the external device directly when it is connected to the mains.
  • the converter 6 charges the battery 10 at the same time as it supplies the external device.
  • this connection between the output of the converter 6 and the cord 8 can be omitted.
  • the power supply cannot directly supply the device 1.
  • a diode 13 is preferably provided at the output of the converter 6 to avoid the possible discharge of the battery 10 and / or of the battery 2 of the device outside, through the converter 6.
  • the power supply 5 advantageously makes it possible to charge the battery 10 in a few minutes when the user has access to the sector. Optionally, it allows you to simultaneously start charging the battery 2 of the phone 1 from the mains. When the sector is no longer available, the power supply 5 begins or continues to charge the battery 2 from the energy stored in its battery 10.
  • the power supply 15 of Figure 2 is a more developed version of the power supply 5 of Figure 1. It includes identically, and with the same operation, all the elements of the power supply 5 which are therefore designated by the same references in FIG. 2.
  • the power supply 15 is also intended to be used with the telephone 1 not shown in FIG. 2. It also comprises additional circuits.
  • the power supply 15 comprises a second converter 16 supplying at the output the same voltage as the first converter 6, but from a low voltage applied at the input. It is preferably a converter accepting an input voltage in the range of 3 to 15 volts, or even 3 to 25 volts, direct or alternative. This converter can be of any suitable known type.
  • the output of the converter 16 supplies the battery 10 and preferably also the external device, in a similar manner to the converter 6.
  • the output of the converter 16 can charge the battery 10 via the charge control circuit 11 and supply the power the external device connected to the cord 8 via, if necessary, the current limiting circuit 9 and the voltage limiting circuit already mentioned for the power supply 5.
  • the input of the converter is connected to a cord 17 provided with one or more connectors allowing connection with different types of low voltage electrical sources.
  • it can be a 9 Volt electric battery, a 6 Volt bicycle dynamo or the 12 Volt battery of a motor vehicle on which it is possible to connect to the cigarette lighter.
  • low voltage electrical energy sources make it possible to charge the battery 10 and / or directly supply the external device, in a similar manner to the converter 6 from the mains.
  • a diode 18 is preferably provided at the output of the converter 16 to prevent the batteries 2 or 10 from being able to discharge through the converter 16 or else that the converter 6 cannot inject current into the latter. Similarly, the diode 13 prevents the converter 16 from being able to inject current into the output of the converter 6.
  • the power supply 25 of Figure 3 is a variant of the power supply 15 of Figure 2. It includes identically, and with the same operation, all the elements of the power supply 15 which are therefore designated by the same references in FIG. 3. In our example, the power supply 25 is also intended to be used with the telephone 1 not shown in FIG. 3.
  • the power supply 25 differs from the power supply 15 in that it further comprises a controlled reversing switch 19 which can be implemented using transistors for example.
  • This inverter 19 makes it possible to connect the input of the converter 16 selectively to the low voltage power source connected to the cord 17 or to the battery 10.
  • a circuit - not shown - controls the inverter 17 to connect the cord 17 to the input of the converter 16 when the low voltage power source is actually connected to the cord 17.
  • the presence of the low voltage power source can be determined by detecting its voltage at terminals of the cord 17, for example using a comparator circuit with an operational amplifier. In this case, the supply is in the configuration of the supply 15.
  • the control circuit of the inverter 19 can cause the switching of the inverter 17 to connect the battery 10 to the input of the converter 16 In other words, the battery 10 then supplies the external device via the converter 16.
  • This possibility is advantageous since the voltage across the terminals of the battery 10 decreases progressively as a function of its discharge. Thus, it makes it possible to raise the voltage of the battery 10 to a level sufficient to continue to supply the external device in the event that the voltage across the terminals of the battery 10 becomes too low. This possibility therefore makes it possible to take full advantage of the storage capacity of the battery 10.
  • the latter may also be made up of a smaller number of accumulator cells to define a battery having a lower voltage.
  • battery 10 can be made up of four 1.2 Volt Nickel-Cadnium cells, instead of five in the example cited for the power supply 5. This results in a 4.8 Volt battery whose voltage varies between 3.6 Volts and 6 Volts depending on its charge level. When it goes below 5 Volts, the voltage of the battery 10 becomes insufficient to charge the battery 2 at a voltage of 4.2 Volts taking into account the voltage drops introduced by the intermediate elements: diode 12, current limiting circuit 9, control circuit 4, etc.
  • the control circuit of the inverter 19 can be provided to connect the battery 10 to the input of the converter 16 as soon as the voltage of the battery 10 drops below of 5 Volts. Consequently, it is the - higher - output voltage of the converter 16 which supplies the battery 2. Furthermore, the output voltage supplied by the converters 6 and 16 can be of the order of 6 or 7 Volts, at instead of the aforementioned 8 or 9 Volts in the case of the power supply 5.
  • the power supply 35 of FIG. 4 is a variant of the power supply 25 of FIG. 3. It includes identically, and with the same operation, all the elements of the power supply 25 which are therefore designated by the same references in FIG. 3. In our example, the power supply 25 is also intended to be used with the telephone 1 not shown in FIG. 4.
  • the power supply 35 differs from the power supply 25 in that it further comprises another controlled reversing switch 20 which can be implemented using transistors for example.
  • This inverter 20 makes it possible to connect the low voltage power source connected to the cord 17 selectively to the input of the converter 16 via, where appropriate, the inverter 19 or to the cord 8 via, where appropriate, the current limiting circuit 9.
  • the supply 35 In the first position of the inverter 20, the supply 35 is found in the configurations described above . In the other position, the low-voltage energy source supplies the external device via the current limiting circuit 9 and the battery 10, without passing through the converter 16.
  • a control circuit - not shown - puts the inverter 20 in this other position when the voltage of the power source connected to the cord 17 is within an acceptable range to be applied directly to the external device and to the battery 10. This will avoid the efficiency losses linked to the converter 16. For example, for telephone 1 having a 3.6 V Lithium-Ion type battery, this voltage range can be 5.5 to 7 Volts.
  • this variant can also be implemented in the absence of the inverter 19 making it possible to connect the battery 10 to the input of the converter 16. In other words, this variant can be implemented on the power supply 15 of FIG. 2. It suffices for this to connect the terminal of the switch 20 - which is connected in FIG. 4 to one of the terminals of the inverter 19 - directly at the input of the converter 16.
  • the power supply is provided so as not to charge the battery 10 , but only power the external device, when the power supply is connected not to the mains by the cord 7, but only to a low voltage energy source less than 12 Volts by the cord 17.
  • the power supply preferably simultaneously charges the battery 10 and the power supply of the external device connected to the cord 8 like this has been described previously.
  • the power supply charges the battery 10 whatever the source of energy available at the input.
  • an energy source having a voltage greater than or equal to 12 volts generally co ⁇ espond to a motor vehicle battery which is capable of supplying sufficient current to simultaneously charge the battery 10 and supply the external device.
  • an energy source having a voltage of less than 12 Volts generally corresponds to a low power source which should then be more advantageously used for the sole supply of the external device. when the latter is connected to the cord 8.
  • An alternative to this variant consists in not automatically making the selection between the sole supply of the external device and the simultaneous charging of the battery 10, as a function of the voltage of the energy source connected at the input.
  • the power supply may include a manual switch allowing the user to selectively allow or prevent charging of the battery 10 from the power source connected to the input. Consequently, he can choose himself whether he wishes to supply only the external device connected to the supply or simultaneously charge the battery 10.
  • the power supplies 5, 15, 25 and 35 may all comprise a box 23 which houses all of the circuits which form part thereof, including the battery 10, with the plugs of the cords 7, 8 and, where appropriate, 17, which are accessible from outside the housing 23.
  • the housing 23 has been shown symbolically in phantom in the figures.
  • the battery 10 can be external to the housing 23 and removable.
  • the power supply may include a connector - for example placed in a housing made in the housing 23 and accessible from outside the housing - to allow connection and disconnection of the battery 10. This variant has the advantage of being able to charge successively several batteries 10 and then use them successively to supply the external device.
  • the power supply in the housing 23 is used to recharge the battery 10 which can then be separated from the housing 23 and connected with the separate cord to the external device to supply the latter.
  • the cord 8 of the power supply in the housing 23 can even be removed in this case.
  • the battery 10 can be replaced by any suitable means of storing electrical energy, preferably accepting to be charged very quickly. They may in particular be supercapacitors. It can be by example of supercapacitors with capacities of around 3000 Farad sold by the Korean company Ness.
  • the invention can be implemented with a battery 10 or another means of storing electrical energy which does not allow an ultra-rapid charge in which case the power supply of the invention may not be provided in order to be able to achieve this. load type.
  • Another variant consists in providing a solar panel 21 - for example 7.2 Volts - on the housing 23 and which also makes it possible to charge the battery 10 and / or to supply the external device.
  • a diode 22 can also be provided there to prevent the battery 10, the battery 2 or another energy source connected to the input of the power supply from being able to discharge in the solar panel.
  • Such a solar panel can advantageously provide electrical energy in the absence of any other available source.
  • cords with plugs 7, 8 and 17 can be replaced by any other suitable means allowing the connection of the input energy sources, as well as the external device.
  • the battery 10 generally consists of several elementary accumulator cells connected in series to obtain the desired battery voltage - cf. the examples cited in relation to FIGS. 1 and 3. Consequently, the charging of the battery 10 is carried out conventionally on the battery 10 with its cells connected in series. As a variant, the charging of the battery 10 can be carried out individually for each of the cells of the battery 10. Such a variant is represented by FIG. 5 and is based on the power supply 5 of FIG. 2.
  • the references 8 and 9 respectively denote the current limiting circuit and the cord used to connect the external device to be supplied.
  • the battery 10 taken as an example comprises four elementary cells 10a-10d. Each of the cells 10a-10d corresponds to a charge control circuit 1a-1d.
  • each of the charge control circuits l la-l ld is to carry out an ultra-rapid charge of the cell which corresponds to it.
  • the current is supplied by a converter 6a which replaces the converter 6 of the power supply 2.
  • the converter 6a differs from the converter 6 in that it delivers an adequate voltage to charge a cell of the battery, and not the battery as a whole .
  • the charge control circuits l la-l ld are similar to the control circuit 11 of the power supply 5, except that they are each provided for the control of a single battery cell, instead of the entire battery.
  • a series of controlled switches 27a-27c - for example MOS transistors - allow - when they are closed - to connect the cells in series so as to constitute the battery 10.
  • Another series of switches 26a-26c - for example MOS transistors - allow - when closed - to connect one terminal of each battery cell - except the last referenced lOd - to ground, the other terminal of the cells being permanently connected to their respective charge control circuits l la-l ld.
  • the 10d cell is permanently connected to ground.
  • the terminal of the first cell 10a which is connected to its charge control circuit l ia, is also connected to the cord 8 via the current limiting circuit 9.
  • the power supply can be provided with an additional converter 6b if it it is desired to be able to simultaneously charge the cells 10alOd and supply the device connected to the cord 8 when the cord 7 is connected to the mains.
  • the converter 6b also receives the mains input as a result of the cord 7.
  • the converter 6b provides a voltage output enabling the device to be supplied directly via the current limiting circuit 9.
  • a diode 13b ensures the coupling to the limiting circuit
  • This last variant allows a more reliable charge of the battery due to the individual control of each battery cell.
  • this variant can be adapted to any embodiment described above, in particular to power supplies 15, 25 and 35.
  • the device according to the invention makes it possible to power any kind of electrical device, in particular devices not having a clean battery, unlike the portable telephone taken as an example. So we can for example power a radio.
  • the charge control circuit 11 and the battery 10 are eliminated in the power supplies 15 and 35. This then simply results in a universal power supply allowing the supply of the external device to the choice by the sector or by a low-voltage energy source, see through the solar panel 21 integrated into the housing 23. But the power supply no longer offers the possibility of own storage of electrical energy.
  • its weight is preferably less than or equal to three times, more advantageously one and a half times and even more advantageously one time the weight of the device which it is intended to power in the case where this device is a mobile telephone or a pocket electronic diary.
  • its weight is preferably less than or equal to 20%, more advantageously 10% of the weight of the device that it is intended to power in the case where this device is a portable computer.
  • FIG. 1 illustrates the fact that the use of a buffer energy storage means 10 is independent of the possibility for the device of the invention to be able to be supplied from '' a mains supply or from a low voltage electrical energy source.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
  • Dc-Dc Converters (AREA)
  • Power Sources (AREA)
PCT/FR2002/003841 2001-11-09 2002-11-08 Procede et dispositif d'alimentation en energie electrique d'un appareil Ceased WO2003041189A2 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP02793218.5A EP1446855B1 (fr) 2001-11-09 2002-11-08 Procede et dispositif d'alimentation en energie electrique d'un appareil
JP2003543121A JP4261358B2 (ja) 2001-11-09 2002-11-08 機器に電気エネルギーを供給する方法および装置
AU2002358880A AU2002358880A1 (en) 2001-11-09 2002-11-08 Method and device for supplying electric power to an appliance
US10/494,918 US7408272B2 (en) 2001-11-09 2002-11-08 Method and device for supplying electric energy power to an appliance

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR01/14538 2001-11-09
FR0114538A FR2832262A1 (fr) 2001-11-09 2001-11-09 Procede et dispositif d'alimentation en energie electrique d'un appareil

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WO2003041189A3 WO2003041189A3 (fr) 2004-03-04

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US (1) US7408272B2 (enExample)
EP (1) EP1446855B1 (enExample)
JP (1) JP4261358B2 (enExample)
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JP4261358B2 (ja) 2009-04-30
EP1446855B1 (fr) 2018-04-18
US20050057225A1 (en) 2005-03-17
FR2832262A1 (fr) 2003-05-16
EP1446855A2 (fr) 2004-08-18

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