Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Cell enclosure structure – e.g. – housing – casing – container,...
Patent
1997-12-11
2000-02-01
Nuzzolillo, Maria
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Cell enclosure structure, e.g., housing, casing, container,...
429164, 429127, H01M 202
Patent
active
060200863
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
FIELD OF THE INVENTION
The invention relates to an accumulator device for an electric and/or electronic apparatus comprising:
The invention likewise relates to a type of portable radio telephone notably comprising such a device.
A problem often faced with accumulators is caused by the increase of pressure during the charging operation. This increase of pressure becomes formidable with accumulators which use active elements notably of the lithium-ion type. To avoid the unwanted effects of this pressure, a robust casing is known to be provided for packing this active element. Metallic casings are then used which are considered too heavy and too costly. This is considered disadvantageous.
It is suitable to note that certain accumulators need to have a certain pressure for operating properly.
The invention proposes a device of the type defined in the opening paragraph for which the problem of rising pressure is solved in a satisfactory manner without costing too much and which thus does not have the drawback mentioned earlier.
SUMMARY OF THE INVENTION
Therefore, such a device is characterized in that said casing is curved, so that the increase of pressure occurring during the charging operation is counterbalanced.
The invention is based on the recognition that a curved structure is used which is a robust structure and can thus easily withstand a growing pressure.
Thus, the advantage is obtained that the accumulator device can have a structure which is thin enough similar to bank cards.
These and other aspects of the invention will be apparent from and elucidated with reference to the embodiments described hereinafter.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings:
FIG. 1 shows the various components forming the device according to the invention,
FIG. 2 shows an elevational view of the arrangement of the components of FIG. 1,
FIG. 3 shows the curvature of these components according to the invention,
FIG. 4 shows a first embodiment of the invention,
FIG. 5 shows a second embodiment of the invention,
FIG. 6 shows a third embodiment of the invention,
FIG. 7 shows an apparatus in accordance with the invention, on which an accumulator device has just been installed,
FIG. 8 shows a fourth embodiment of the invention,
FIG. 9 shows a fifth embodiment of the invention,
FIG. 10 shows a way of facilitating the curvature of the casing,
FIG. 11 shows a sixth embodiment of the device according to the invention, and
FIG. 12 shows a variant of the embodiment shown in FIG. 11.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
In FIG. 1, the active element 1 is an element which presents itself in the form of a plate. Elements of this type are mentioned in U.S. Pat. Nos. 5,047.300 and 5,198,313. Two electrodes 5 and 6 permit of charging and providing the energy. These electrodes may be bent according to the user's wishes. For protecting this active element 1 against the environment, a casing 9 is necessary. It is formed by a frame 10 and two caps 12 and 13. The active element 1 is placed inside the frame 10. The two caps 12 and 13 are flush-mounted with the walls of the frame 10, so that the active element 1 is inserted into the casing thus formed. The casing then has the form of a prism. FIG. 2 shows in an elevational view the casing with the active element inside it. The casing may be formed by plastic material of which well-known bank cards are formed. One may thus obtain a very flat aspect of the device according to the invention which is similar to bank cards or any other card of this type (telephone card etc.).
In accordance with the invention, said casing is curved as is shown in FIG. 3. The curvature of the casing is obtained either by curving means which control the resilience of the casing, or this curvature is final as a result of the initial concept of the casing.
For obtaining this curvature, the invention proposes a plurality of variants of embodiments.
A first variant is shown in FIG. 4. Two pins, or protrusions, 20 and 21, are provided on a side wall of the casing which is to be
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Halajian Dicran
Nuzzolillo Maria
O'Malley Jennifer
U.S. Philips Corporation
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