Electricity: battery or capacitor charging or discharging – Battery or cell discharging – With charging
Patent
1998-06-05
2000-09-19
Wong, Peter S.
Electricity: battery or capacitor charging or discharging
Battery or cell discharging
With charging
320130, H02J 700
Patent
active
061217549
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
Electrical devices having electrical energy stores (for example batteries or rechargeable batteries) and means for indicating the "low energy store" state (for example a display, bell etc.) are, for example, mobile telecommunications devices (radios) which are based on the frequency and/or time-division multiplex method or the code-division multiplex method and are supplied with electrical power via rechargeable batteries or batteries.
For example, there are thus cordless mobile parts according to the DECT/GAP Standard (Digital European Cordless Telecommunication; see (1): Nachrichtentechnik Elektronik 42 [Telecommunications electronics 42] (1992, January/February/. No. 1, Berlin, DE; U. Pilger: "Struktur des DECT-Standards" [Structure of the DECT Standard], pages 23 to 29; (2): Philips Telecommunication Review, Vol. 49, No. 3, September 1991; R. Mulder: "DECT-Universal Cordless Access System", pages 68 to 73/Generic Access Profile; see ETSI Publication (prETS 300 444, April 1995, Final Draft, ETSI, FR) or mobile radio mobile parts to the GSM Standard (Groupe Speciale Mobile or Global System for Mobile Communication; see Informatik Spektrum 14 [Information spectrum 14] (1991) June, No. 3, Berlin, DE; A. Mann: "Der GSM-Standard--Grundlage fur digitale europaische Mobilfunknetze" [The GSM Standard--The basis of European digital mobile radio networks], pages 137 to 152).
Based on the document Components 31 (1993), Issue 6, pages 215 to 218; S. Althammer, D. Bruchmann: "Hochoptimierte IC's fur DECT-Schnurlostelefone" [Highly optimized ICs for DECT cordless telephones], FIG. 1 shows the basic circuit design of a cordless mobile part MT which is used, for example, the Siemens "Gigaset 951/952" cordless telephone (see telcom report 16 (1993), Issue 1, pages 26 and 27).
The circuit design comprises a radio section FKT, a signal processing device SVE with a signal control section SST designed as a burst mode controller BMC, and a signal conversion section SUT designed as a Codec and AD/DA converter, a clock generator TG, a central controller ZS designed as a microcontroller .mu.c, a BOF interface BSS to an operator interface BOF with a keypad TA, an indicating device AE, an earpiece HK, a microphone MF and a bell TRK as well as a power supply SV with a rechargeable battery (accumulator) AKK, which items are connected to one another in the illustrated manner. The principle of the method of operation of the circuit design is described, for example, in the documented cited above, Components 31 (1993), Issue 6, pages 215 to 218.
Instead of the rechargeable battery AKK, it is also possible to use a battery as an energy store for the cordless mobile part MT. When the stored energy is exhausted, in contrast to the rechargeable battery which is regenerated at the charging station LST, this battery is replaced by a new battery.
In order to charge the rechargeable battery AKK, the mobile part MT forms a functional unit with a charging station LST in such a manner that the rechargeable battery AKK of the mobile part MT is charged, for example, in accordance with the method known from WO94/10782.
If--after such charging--the mobile part MT has been in operation for a relatively long time period and, in consequence, the capacity of the rechargeable battery AKK is virtually exhausted, then--as is generally normal for electrical devices powered by rechargeable batteries--the "low battery" state is indicated. The indication can in this case be produced visually by displaying a rechargeable battery symbol on the indicating device (display) AE of the mobile part MT, and/or audibly by emitting a warning tone via the bell TRK of the mobile part MT. Both the display of the rechargeable battery symbol and the emission of the warning tone should be produced in good time for the user of the mobile part MT in this case so that the mobile part still has a residual operating time until the "rechargeable battery flat" state is reached, which residual operating time can be used by the user of the mobile part MT if
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Telecom Report 16, (1993) Heft 1, Schwerpunkt, Digitaler Komfort Fur Schnurlose Telekommunikation, pp. 26 and 27.
Component 31 (1993) Heft 6, Stephan Althammer et al, Hochoptimierte ICS Fur DECT-Schnurlostelefone, pp. 215-218.
Nachrichtentechnik Elektronik vol. 42 (Jan./Feb. 1992), No. 1, Berlin, Ulrich Pilger, Struktur Des DECT-Standards, pp. 23-29.
Philips Telecommunication Review, vol. 49, No. 3, Sep. 1991, R.J. Mulder, DECT, A Universal Cordless Access System, pp. 68-73.
Informatik-Spektrum (1991), vol. 14, No. 3, Berlin, A. Mann, Der GSM-Standard, Grundlage fur digitale europaische Mobilfunknetze, pp. 137-152.
Luk Lawrence
Siemens Aktiengesellschaft
Wong Peter S.
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