JP2002222664A - Lithium polymer battery - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To enable a lithium polymer battery to be mounted according to various shapes of equipment. SOLUTION: A plate-shaped lithium polymer battery 1 is formed in a curved shape corresponding to various shapes of a device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to various portable terminal devices,
The present invention relates to a lithium polymer battery used for a mobile communication device, an audio device, and the like.

[0002]

2. Description of the Related Art Conventionally, a lithium polymer battery formed in a flat plate shape as shown in FIG. 6 has been used for various portable terminal equipment, mobile communication equipment, audio equipment and the like.

As shown in FIG. 7, this lithium polymer battery 1 has a pair of electrode legs 2 protruding from one side of a rectangular plate-like body. A laminate formed by laminating a plurality of layers including a positive electrode current collector 3, a positive electrode 4, a polymer (gel electrolyte) 5a, a separator 6, a polymer (gel electrolyte) 5b, a negative electrode 7, and a negative electrode current collector 8; The outside is covered with an aluminum laminated film 9.

The polymers (gel electrolytes) 5a and 5b constituting the lithium polymer battery are composed of a three-dimensional network cross-linked polymer 10 and a completely gelled electrolyte 11, as shown in FIG. .

The battery thus constructed has a thickness of 3 mm.
In addition to being able to be as thin as possible, the gel electrolyte has high ionic conductivity, can maintain a gel state even at high temperatures, has excellent filtrate resistance, and has flexibility.

[0006]

However, since the conventional lithium polymer battery is formed in a flat plate shape, there is a problem that a flat mounting space must be provided on the device side.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a lithium polymer battery which can be mounted in various shapes other than a plane portion of a device. .

[0008]

According to the present invention, there is provided a lithium polymer battery according to the present invention.
Is characterized in that a plate-shaped lithium polymer battery used for various portable terminal equipment, mobile communication equipment, audio equipment and the like is formed in a curved shape, and can be mounted corresponding to various shapes of the equipment. .

A second aspect of the present invention is the lithium polymer battery according to the first aspect, wherein the plate-shaped lithium polymer battery is formed to have a U-shaped cross section.

A third aspect of the present invention is the lithium polymer battery according to the first aspect, wherein the plate-shaped lithium polymer battery is formed to have a V-shaped cross section.

According to a fourth aspect of the present invention, there is provided the lithium polymer battery according to the first aspect, wherein the plate-shaped lithium polymer battery is formed into a U-shaped cross section.

According to the first to fourth aspects, by forming a plate-shaped lithium polymer battery into a curved shape, it becomes possible to mount the battery corresponding to various shapes of the device. This makes it possible to effectively use the space in the device.

[0013]

1 to 5 relate to a lithium polymer battery of the present invention. FIG. 1 is a perspective view of a circular arc-shaped lithium polymer battery, FIG. 2 is a perspective view of a U-shaped lithium polymer battery, and FIG. 3 is a perspective view of a lithium polymer battery having a V-shaped cross section, FIG. 4 is a perspective view of a lithium polymer battery having electrode legs projecting sideways, and FIG. 5 is a perspective view of a battery polymer battery having electrode legs projecting from ends. It is.

According to the present invention, the flat-shaped lithium polymer battery is formed into a curved shape corresponding to the shape of the device as shown in FIGS. 1 to 3 by utilizing its flexibility. FIG. 1 shows a lithium polymer battery main body 1a having a U-shaped cross section, which can be attached to, for example, an arc-shaped corner portion of a camera.

FIG. 2 shows a tumour-polymer battery main body 1b formed in a U-shaped cross section, which can be attached to a U-shaped corner or the like.

FIG. 3 shows a lithium polymer battery main body 1c having a V-shaped cross section, which can be attached to, for example, a V-shaped corner portion.

The curved shape is not limited to the above example, but can be curved in accordance with the shape of various devices.

FIGS. 4 and 5 show an example of a lithium polymer battery main body 1a curved in a U-shape.
In the case of FIG. 4, the electrode feet 2 and 2 are projected at an arbitrary position on the side of the battery, and in the case of FIG. 5, the electrode feet 2 and 2 are projected at the end face.

The electrode legs 2, 2 of the bent-shaped lithium polymer battery can be set to have a small interval between them, so that the electrical connection structure can be simplified.

[0020]

According to the present invention, it is possible to mount a lithium polymer battery according to the shape of a device by forming the lithium polymer battery into various shapes. This makes it possible to effectively use the space of the mounting portion.

Further, by bending the battery, the distance between the electrode legs can be reduced, and the electrical connection structure can be simplified.

[Brief description of the drawings]

FIG. 1 is a perspective view of a lithium polymer battery having an arc-shaped cross section according to an embodiment of the present invention.

FIG. 2 is a perspective view of a U-shaped cross-section lithium polymer battery.

FIG. 3 is a perspective view of a V-shaped lithium polymer battery cross section.

FIG. 4 is a perspective view of a tube polymer battery having electrode legs projecting sideways.

FIG. 5 is a perspective view of a tumour-polymer battery having an electrode leg protruding from an end.

FIG. 6 is a partial cross-sectional view of a lithium polymer battery.

FIG. 7 is an enlarged internal view of the same.

FIG. 8 is a schematic structural diagram of a gel electrolyte.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lithium polymer battery 2 Electrode foot 3 Positive electrode collector 4 Positive electrode 5 Polymer (gel electrolyte) 6 Separator 7 Negative electrode 8 Negative electrode collector 9 Exterior

Claims (4)

[Claims] The present invention is characterized in that a plate-shaped lithium polymer battery used for various portable terminal equipment, mobile communication equipment, audio equipment, and the like is formed in a curved shape, and can be mounted corresponding to various shapes of the equipment. Lithium polymer battery. 2. The lithium polymer battery according to claim 1, wherein the plate-shaped lithium polymer battery is formed into a U-shaped cross section. 3. The lithium polymer battery according to claim 1, wherein the plate-shaped lithium polymer battery is formed into a V-shaped cross section. 4. The lithium polymer battery according to claim 1, wherein the plate-shaped lithium polymer battery is formed in a U-shaped cross section.