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Dokumentenidentifikation EP0883924 22.06.2006
EP-Veröffentlichungsnummer 0000883924
Titel ELEKTRISCHE STROMVERSORGUNGSVORRICHTUNG ZUR ERZEUGUNG EINER VIELZAHL VON SPANNUNGEN UND GERÄT DAMIT
Anmelder Koninklijke Philips Electronics N.V., Eindhoven, NL
Erfinder VAN LERBERGHE, Jan, Steven, NL-5656 AA Eindhoven, NL
Vertreter derzeit kein Vertreter bestellt
DE-Aktenzeichen 69735882
Vertragsstaaten DE, FR, GB
Sprache des Dokument EN
EP-Anmeldetag 09.06.1997
EP-Aktenzeichen 979232808
WO-Anmeldetag 09.06.1997
PCT-Aktenzeichen PCT/IB97/00662
WO-Veröffentlichungsnummer 0097049160
WO-Veröffentlichungsdatum 24.12.1997
EP-Offenlegungsdatum 16.12.1998
EP date of grant 17.05.2006
Veröffentlichungstag im Patentblatt 22.06.2006
IPC-Hauptklasse H02J 9/06(2006.01)A, F, I, 20051017, B, H, EP

Beschreibung[en]
FIELD OF THE INVENTION

The invention relates to a power supply device supplying an apparatus having at least rest states and active states, comprising:

  • a first battery for providing a first voltage to a first pair of terminals;
  • a second battery;
  • a switching assembly which selectively provides series or parallel connection between said first battery and said second battery and supplies a second voltage to a second pair of terminals in the series connection of batteries;
  • a control circuit for monitoring the voltage levels of said batteries and for changing the links to batteries.

The invention also relates to an apparatus comprising such a device.

Such a device finds highly significant applications notably in the field of cordless telephone sets. Actually, these sets comprise, on the one hand, high-frequency circuits which call for relatively high voltages, and, on the other hand, logic circuits which call for less high voltages.

BACKGROUND OF THE INVENTION

A device of this type is described in European Patent No. 0 624 944. This known device makes use of DC voltage converters which are considered costly, cumbersome and heavy. They are thus not suitable for the application discussed above where, for reasons that the apparatus must be portable, a small weight and as small dimensions as possible are needed while a reasonable cost price is maintained.

The invention proposes a device of the type mentioned in the opening paragraph which largely remedies the drawbacks of price, size and weight presented by the known device.

SUMMARY OF THE INVENTION

Therefore, a device of the type defined in the opening paragraph is characterized in that it comprises auxiliary means for mitigating discharges by at least one of the accumulator assemblies, according to claim 1.

BRIEF DESCRIPTION OF THE DRAWINGS

These and other aspects of the invention will be apparent from and elucidated with reference to the embodiments described hereinafter.

In the drawings:

  • Fig. 1 shows an apparatus according to the invention,
  • Fig. 2 shows a device according to the invention, and
  • Fig. 3 shows a preferred embodiment of an evaluation circuit which forms part of a device according to the invention.

DESCRIPTION OF PREFERRED EMBODIMENTS

The apparatus shown in Fig. 1 is a GSM terminal, for example. It comprises a casing 1 on which are provided a microphone 2, a screen 3, a keypad 4, an earpiece 5 and an antenna 6. For supplying power to this device, it includes a power supply device 10 according to the invention, whose diagram is shown in Fig. 2.

The device shown in Fig. 2 is intended to provide two different voltages on accesses 15 and 16 and also on accesses 17 and 16. These voltages, seen from a common voltage line 18 connected to the access 16, are necessary for supplying power to the electronic part 20 of the apparatus. This electronic part comprises logic circuits for managing the apparatus, fed via the accesses 17-16, and a radio circuit formed by a receiver circuit and a transmitter circuit which need to have a relatively high supply voltage. The radio circuit is fed by the voltage present on accesses 15-16.

For obtaining these voltages, two accumulator assemblies 25 and 26 connected by a series connection 27 are used. This series connection comprises a branch point 30. The first voltage is formed by the voltage of the first assembly 25 occurring at accesses 17 and 16. The branch point 30 is then connected to access 17. The second voltage is formed by the fact that the two assemblies, whose ends again occur at accesses 15 and 16, are combined in series.

The charging state of the assemblies 25 and 26 is evaluated by an evaluation circuit 35 which produces an active signal S when an accumulator assembly seems to be discharged. For assisting, nevertheless, the apparatus to which it is connected within the scope of this described example, the assembly 25 has a large capacity and the assembly 26 a small capacity, it is therefore supposed that only assembly 26 is discharged.

When the signal S is active, a switch assembly formed by switch circuits s0, s1 and s2 creates a back-up line 36 for sending the voltage of the assembly 25 to access 15-16. Although this voltage is less than the voltage provided, the receiver circuit of the electronic part 20 can still operate, but the transmitter circuit will no longer operate. This back-up line 36 is thus formed by the switch circuit s2 in a closed state.

According to a significant characteristic of the invention, when the signal S is active, a charging link is created, formed by a part 40a and a part 40b. In this described example the part 40b is identical with the switch circuit s2 and the part 40a with a switch circuit s1 which connects one end of the assembly 26 to the shared voltage line 18. The accumulator assemblies are thus connected in parallel.

It should be noted that this charging could systematically take place for an application according to which a high voltage is only required intermittently. This is notably the case in subscriber sets of the GSM system which change from a state of rest for which the management and the listening mode are solely induced to an active state for which transmission must be ensured. The active state can only take place every eighth time period. The charging of the assembly 26 may take place during the states of rest of the apparatus. Thus, in normal operation, the switch circuits s1 and s2 are open, whereas the switch s0 is closed. When the signal S is active, the switch circuits s1 and s2 are closed, whereas the switch s0 is open.

Fig. 3 shows a preferred embodiment of the evaluation circuit 35. In this embodiment, the accumulator assemblies 25 and 26 are of the same type. The assembly 25 is formed by at least two accumulator elements 50 and 51 which have a large capacity, and the assembly 26 by a single accumulator element 55. Two amplifiers 58 and 59 produce on their output a signal that represents the voltage delivered by the accumulator elements 50 and 55, respectively. A comparator 60 for comparing these output signals produces the signal S which, when it is active (the voltage of element 55 is lower than that of element 50), opens the switch s0 and closes the switches s1 and s2.

The switch circuits s0, s1 and s2 discussed above may be formed by MOS-type transistors, as this is well known in this field of technology.

The accumulator assemblies are preferably formed on the basis of those described in United States Patent No. 5,047,300.

Although the description has been made with two accumulator assemblies, the invention also covers the fact that a plurality of accumulator assemblies can be used and a high capacity condensor can constitute any one of the accumulator elements.


Anspruch[de]
Stromversorgungsanordnung, die ein Gerät versorgt, das mindestens Ruhezustände und aktive Zustände hat, die Folgendes umfasst: - eine erste Batterie (25) zum Bereitstellen einer ersten Spannung an einem ersten Paar Anschlüsse (16, 17), - eine zweite Batterie (26), - eine Schaltbaugruppe (s0, s1, s2), die selektiv serielle oder parallele Verbindung zwischen genannter ersten Batterie (25) und genannter zweiter Batterie (26) schafft und in der Serienschaltung der Batterien eine zweite Spannung an ein zweites Paar Anschlüsse (15, 16) liefert, - eine Steuerungsschaltung (35) zum Überwachen der Spannungspegel der genannten Batterien und zum Ändern der Verbindungen mit den Batterien, dadurch gekennzeichnet, dass die Steuerschaltung (35) Mittel zum Überwachen des Spannungspegels der genannten zweiten Batterie (26) umfasst und, wenn der genannte Spannungspegel unter einen vorher festgelegten Pegel fällt, eine Aufladeverbindung durch Schaffen einer Parallelverbindung zwischen der genannten ersten Batterie (25) und der genannten zweiten Batterie (26) bereitstellt, sodass die genannte erste Batterie (25) die genannte zweite Batterie (26) auflädt. Stromversorgung nach Anspruch 1, dadurch gekennzeichnet, dass die zweite Batterie (26) eine geringere Kapazität hat als die erste (25). Stromversorgung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Steuerungsschaltung (35) Mittel zum Einrichten einer Serienverbindung umfasst, um die genannten Batterien (25, 26) während der aktiven Zustände zum Liefern der genannten zweiten Spannung in Serie zu schalten. Stromversorgung nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass die genannte Aufladeverbindung, wenn erforderlich, während der Ruhezustände eingerichtet wird. Stromversorgung nach Anspruch 1, 2, 3 oder 4, dadurch gekennzeichnet, dass die aktiven Zustände periodisch auftreten. Gerät mit einer Stromversorgung nach einem der Ansprüche 1 bis 5.
Anspruch[en]
A power supply device supplying an apparatus having at least rest states and active states, comprising: - a first battery (25) for providing a first voltage to a first pair of terminals (16, 17), - a second battery (26), - a switching assembly (s0, s1, s2) which selectively provides series or parallel connection between said first battery (25) and said second battery (26) and supplies a second voltage to a second pair of terminals (15, 16), in the series connection of batteries - a control circuit (35) for monitoring the voltage levels of said batteries and for changing the links to batteries, characterized in that the control circuit (35) comprises means for monitoring a voltage level of said second battery (26) and provides a charging link when said voltage level drops below a predetermined level by providing a parallel connection between said first battery (25) and said second battery (26), so that said first battery (25) is charging said second battery (26). A power supply device as claimed in claim 1, characterized in that the second battery (26) has a smaller capacity than the first one (25). A power supply device as claimed in claim 1 or 2, characterized in that the control circuit (35) comprises means for establishing series connection for connecting said batteries (25, 26) in series during the active states for supplying said second voltage. A power supply device as claimed in claim 1 or 2 or 3, characterized in that said charging link is established during the rest states, if needed. A power supply device as claimed in claim 1 or 2 or 3 or 4, characterized in that the active states are periodic. Apparatus comprising a power device as claimed in one of the claims 1 to 5.
Anspruch[fr]
Dispositif d'alimentation en énergie qui alimente un appareil ayant au moins des états de repos et des états actifs comprenant: - une première batterie (25) pour alimenter une première paire de bornes (16, 17) en une première tension; - une seconde batterie (26); - un ensemble de commutation (s0, s1, s2) qui fournit sélectivement un montage en série ou un montage en parallèle entre ladite première batterie (25) et ladite seconde batterie (26) et qui alimente une seconde paire de bornes (15, 16) dans le montage en série de batteries en une seconde tension; - un circuit de commande (35) pour contrôler les niveaux de tension desdites batteries et pour changer les raccordements à des batteries, caractérisé en ce que le circuit de commande (35) comprend des moyens pour contrôler un niveau de tension de ladite seconde batterie (26) et qui fournit une liaison de charge lorsque ledit niveau de tension baisse au-dessous d'un niveau prédéterminé par l'application d'un montage en parallèle entre ladite première batterie (25) et ladite seconde batterie (26), de sorte que ladite première batterie (25) est en cours de charger ladite seconde batterie (26). Dispositif d'alimentation en énergie selon la revendication 1, caractérisé en ce que la seconde batterie (26) présente une plus petite capacité que la première batterie (25). Dispositif d'alimentation en énergie selon la revendication 1 ou 2, caractérisé en ce que le circuit de commande (35) comprend des moyens pour établir un montage en série pour monter en série lesdites batteries (25, 26) pendant les états actifs pour délivrer ladite seconde tension. Dispositif d'alimentation en énergie selon la revendication 1, 2 ou 3, caractérisé en ce que ladite liaison de charge est établie, si besoin est, pendant les états de repos. Dispositif d'alimentation en énergie selon la revendication 1, 2, 3 ou 4, caractérisé en ce que les états actifs sont périodiques. Appareil comprenant un dispositif d'alimentation en énergie selon l'une quelconque des revendications précédentes 1 à 5.






IPC
A Täglicher Lebensbedarf
B Arbeitsverfahren; Transportieren
C Chemie; Hüttenwesen
D Textilien; Papier
E Bauwesen; Erdbohren; Bergbau
F Maschinenbau; Beleuchtung; Heizung; Waffen; Sprengen
G Physik
H Elektrotechnik

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