JP2004349179A - Portable telephone - Google Patents

Portable telephone Download PDF

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Publication number
JP2004349179A
JP2004349179A JP2003146808A JP2003146808A JP2004349179A JP 2004349179 A JP2004349179 A JP 2004349179A JP 2003146808 A JP2003146808 A JP 2003146808A JP 2003146808 A JP2003146808 A JP 2003146808A JP 2004349179 A JP2004349179 A JP 2004349179A
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Japan
Prior art keywords
battery
card
mobile phone
magnetic material
positive electrode
Prior art date
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Pending
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JP2003146808A
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Japanese (ja)
Inventor
Kiyoshi Hanabusa
潔 花房
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Filing date
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Priority to JP2003146808A priority Critical patent/JP2004349179A/en
Publication of JP2004349179A publication Critical patent/JP2004349179A/en
Pending legal-status Critical Current

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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate an influence of a battery contained in a portable telephone to an antenna for a non-contact type IC card in the portable telephone adopting a non-contact type ID identification system. <P>SOLUTION: Lithium metal oxides, such as Li<SB>1-x</SB>FeO<SB>2</SB>, Li<SB>1-x</SB>CrO<SB>2</SB>, Li<SB>1-x</SB>NiO<SB>2</SB>, etc. of a magnetic material is mixed with an anode active substance 10a of one of anode materials and a cathode active substance of one of cathode materials, and magnetic material 10c is obtained in the entirety of an anode 10 and a cathode 9 in a battery 8. Thus, an electromagnetic wave generated from the whole generation main part during electric discharge of the battery 8 can be covered to eliminate the influence of the battery 8 to the antenna 7 can be eliminated. Therefore, it can prevent data exchange between reader/writer 6 and the IC card of the non-contact ID system or power supply from becoming insufficient, and normal transmission and reception can be performed. Incidentally, the material to be mixed may contain, in addition to the lithium metal oxide, metal oxide, such as Fe<SB>2</SB>O<SB>3</SB>, Cr<SB>2</SB>O<SB>3</SB>, Ni<SB>2</SB>O<SB>3</SB>, etc. may be adopted. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、非接触型ＩＤ識別システムを採用した携帯電話機に関する。
【０００２】
【従来の技術】
ＩＤ識別システムは、ＩＣカードとそのデータを読み取る装置との情報の読み書き手段、及びＩＣカードに内臓されたＣＰＵ、メモリ等を作動させるための電力供給の手段により、接触型と非接触型に分類される。接触型ＩＤ識別システムは、カード表面に情報読み書きしたり電力供給を行うための接点端子をカードリーダライタに接触させ、カードリーダライタとのデータ交換やＣＰＵ、メモリへの電力の供給を行なうものである。
一方、近年、携帯電話機への搭載も検討され、電子マネー等への応用が期待されている非接触型ＩＤ識別システムは、電磁誘導原理を応用して情報の受け渡しや電力供給を行うものである。この非接触型ＩＤ識別システムは、一般に非接触型ＩＣカードとリーダライタより構成され、ＩＣカードをリーダライタに近づけるだけで、電磁誘導原理によってＩＣカードへの電力の供給及びデータ交換が行われる。リーダライタの内部には、電磁誘導ループコイルよりなるアンテナが設置されている。また、非接触型ＩＣカードは、ＣＰＵ、メモリ等の半導体チップ、電磁誘導コイル及びデータ入出力端子等が、塩化ビニル樹脂（ＰＶＣ）、ＡＢＳ樹脂、またはポリエチレンテレフタレート（ＰＥＴ）等からなるカード基盤に内蔵されており、このＩＣカードの電磁誘導コイルによりリーダライタに内蔵されたアンテナより発せられる磁束を受信し、ＩＣカードとリーダライタとのデータ交換またはＣＰＵ、メモリへの電力供給が行われる。
【０００３】
【発明が解決しようとする課題】
以上のように、非接触型ＩＤ識別システムは、電磁誘導原理を応用してＩＣカードとリーダライタ間のデータ交換や電力供給を行っているため、電磁誘導を乱すような外乱（システム外からの磁界）を受けた場合、データ交換や電力供給が不十分となり、リーダライタとＩＣカード間の送受信に乱れが生じる場合がある。非接触型ＩＤ識別システムを採用した携帯電話機においては、前述のリーダライタと電源である電池が内蔵されているが、電池は放電中に端子を含む発電本体全体から電磁波を発生しており、この電磁波が非接触型ＩＣカード用のリーダアンテナに影響を及ぼしていた。その結果、リーダライタとＩＣカード間のデータ交換や電力供給が不十分となり、送受信に乱れが生じるという問題があった。なお、携帯電話機の電池としては、高い放電容量と初期効率を有するリチウム二次電池が広く用いられているが、例えば特許文献１では、リチウム二次電池の正極を形成する正極活物質として、コバルト酸リチウム（ＬｉＣｏＯ２）を使用しており、磁性材料は含まれていなかった。また、特許文献２では、負極活物質として黒鉛を使用しており、やはり磁性材料は含まれていなかった。このため、電池自体は放電中に発生する電磁波を遮蔽する手段は備えていなかった。
【０００４】
【特許文献１】
特開２００３−３６８４８号公報
【特許文献２】
特開２００２−２７９９８８号公報
【０００５】
本発明は、上記のような問題点を解消するためになされたもので、非接触型ＩＤ識別システムを採用した携帯電話機において、携帯電話機に内蔵された電池による非接触型ＩＣカード用アンテナへの影響をなくすことを目的とする。
【０００６】
【課題を解決するための手段】
本発明に係わる携帯電話機は、電磁誘導コイルを内蔵したＩＣカードと情報交換を行うための電磁誘導ループコイルよりなるアンテナを有するリーダライタと、電源である電池を内蔵した携帯電話機において、電池の正極材料及び負極材料のいずれか一方または両方に磁性材料を含むものである。これにより、電池の放電中に発電本体全体から発生する電磁波を遮蔽する磁性体を電池内に得ることができるため、電池によるアンテナへの影響をなくすことが可能である。
【０００７】
【発明の実施の形態】
実施の形態１．
以下に、本発明の実施の形態を図面に基づいて説明する。図１は、本発明の実施の形態１における携帯電話機の概略を示す斜視図であり、（ａ）はＬＣＤ側筐体のＬＣＤ部側から見た図、（ｂ）はＬＣＤ側筐体のＬＣＤ部の反対側から見た図である。本実施の形態における携帯電話機である携帯端末１は、キー操作を行うためのキー側筐体２と表示部であるＬＣＤ部４を有するＬＣＤ側筐体３より構成され、これらをヒンジ５により開閉可能に連結したものである。また、本実施の形態における携帯電話機は、非接触型ＩＤ識別システムを採用したものである。非接触型ＩＤ識別システムは、非接触型ＩＣカード（図示せず。以下ＩＣカードと略す）とリーダライタ６より構成され、ＩＣカードをリーダライタ６に近づけるだけで、電磁誘導原理によってＩＣカードへの電力の供給及びデータ交換が行われる。携帯端末１においては、リーダライタ６はＬＣＤ側筐体３に収納されており、その内部には、電磁誘導ループコイルよりなるアンテナ７が設置されている。なお、ＩＣカードは、ＣＰＵ、メモリ等の半導体チップ、電磁誘導コイル及びデータ入出力端子等が、塩化ビニル樹脂（ＰＶＣ）、ＡＢＳ樹脂、またはポリエチレンテレフタレート（ＰＥＴ）等からなるカード基盤に内蔵されており、このＩＣカードの電磁誘導コイルによりアンテナ７より発せられる磁束を受信し、ＩＣカードとリーダライタ６間のデータ交換またはＣＰＵ、メモリへの電力供給が行われる。
【０００８】
また、携帯端末１の電源である電池８は、キー側筐体２の内部に収納されている。本実施の形態における電池８の構造について図２及び図３を用いて説明する。なお、図３は、図２中、点線のブロックＩＩＩで示す正極１０の一部分の詳細な構成を示す模式拡大図である。本実施の形態において用いられる電池８は、図２に示すようなリチウム二次電池であり、その構造は一般的なリチウム二次電池と同様である。すなわち、負極９及び正極１０、ポリオレフィン系の多孔質膜よりなるセパレータ１１、負極集電体１２、正極集電体１３、プロピレンカーボネート系の電解液１４等を組み合わせ、アルミニウム製の缶等からなるケース１５内に収納して形成されている。本実施の形態では、正極１０は、図３に示すように、コバルト酸リチウム（ＬｉＣｏＯ２）等の正極活物質１０ａ、黒鉛等の導電材１０ｂ、Ｌｉ１−ｘＦｅＯ２、Ｌｉ１−ｘＣｒＯ２、Ｌｉ１−ｘＮｉＯ２等のリチウム金属酸化物である磁性体１０ｃ、ポリフッ化ビニリデン等のバインダー１０ｄより構成されている。正極１０の製造方法について簡単に説明する。正極活物質１０ａ約８０重量部に磁性体１０ｃを１重量部〜５重量部混入し、さらに導電材１０ｂ約１０重量部、バインダー１０ｄ約５重量部を混合したものを、２−メチルピロリドンに分散させて混練ペーストを調整し、これをアルミ箔に塗布した後乾燥し、所定の圧力にてプレスして正極１０を形成した。一方、負極９としては例えば黒鉛系炭素材料を用い、負極活物質である黒鉛に磁性材料であるＬｉ１−ｘＦｅＯ２、Ｌｉ１−ｘＣｒＯ２、Ｌｉ１−ｘＮｉＯ２等のリチウム金属酸化物を混入した。このように、本実施の形態では、正極１０の全体及び負極９の全体に、すなわち具体的には、正極１０と負極９の全面積に亘り、またそれらの厚さの全体に亘り、実質的に均一に、リチウム金属酸化物である磁性体１０ｃを混入し、正極１０及び負極９の全体が磁性を持つようにしたものである。
【０００９】
なお、本実施の形態では、電池８の正極活物質１０ａ及び負極活物質に、磁性材料としてＬｉ１−ｘＦｅＯ２、Ｌｉ１−ｘＣｒＯ２、Ｌｉ１−ｘＮｉＯ２等のリチウム金属酸化物を混入したが、混入する磁性材料はこれに限定するものではなく、Ｆｅ２Ｏ３、Ｃｒ２Ｏ３、Ｎｉ２Ｏ３等の金属酸化物でもよい。例えばＬｉ０．５Ｆｅ２．５Ｏ４の場合、飽和磁化は０．３９Ｗｂ／ｍ２であり、金属酸化物中最も磁性のある物質の１つである。また、本実施の形態では、正極材料及び負極材料の両方に磁性材料を混入したが、いずれか一方に磁性材料を混入してもよい。いずれの場合においても、電池８の充電容量及び放電容量等の性能に重大な影響を及ぼさない範囲で混入することが望ましい。
【００１０】
以上のように、実施の形態１では、非接触型ＩＤ識別システムを採用し、電磁誘導コイルを内蔵したＩＣカードと情報交換を行うための電磁誘導ループコイルよりなるアンテナ７を有するリーダライタ６と電池８を内蔵した携帯端末１において、電池８の正極材料及び負極材料に磁性材料を含むようにしたので、正極１０及び負極９の全体に、電池８の放電中に発電本体全体から発生する電磁波を遮蔽する磁性体１０ｃを得ることができ、電磁波によるＩＣカード用のアンテナ７への影響（磁束の減衰）をなくすことができた。これにより、リーダライタ６とＩＣカード間のデータ交換や電力供給が不十分となるのを防止し、正常な送受信が行えるようになった。また、電池８の正極材料及び負極材料の大部分（約８０重量部）を占める正極活物質１０ａ及び負極活物質に磁性材料を混入し正極１０及び負極９を形成するので、電池８としての性能に重大な影響を与えることなく、電池８に電磁波の遮蔽機能をもたせることができる。また、電池８としてリチウム二次電池を用いたので、高い放電容量と初期効率を有すると共に、広く普及しているため安価で入手することができる。さらに、磁性材料としてＬｉ１−ｘＦｅＯ２、Ｌｉ１−ｘＣｒＯ２、Ｌｉ１−ｘＮｉＯ２等のリチウム金属酸化物またはＦｅ２Ｏ３、Ｃｒ２Ｏ３、Ｎｉ２Ｏ３等の金属酸化物を用いることにより、正極活物質１０ａまたは負極活物質にわずか１重量部〜５重量部混入するだけで電磁波を遮蔽する効果が得られる。
【００１１】
【発明の効果】
以上のように、本発明によれば、電池の放電中に発電本体全体から発生する電磁波を遮蔽する磁性体を電池内に得ることができるため、電池によるアンテナへの影響をなくすことができた。これにより、リーダライタとＩＣカード間のデータ交換や電力供給が不十分となるのを防止でき、正常な送受信が行えるようになった。
【図面の簡単な説明】
【図１】本発明の実施の形態１である携帯電話機の概略を示す斜視図である。
【図２】本発明の実施の形態１である携帯電話機に用いられるリチウム二次電池を示す断面図である。
【図３】本発明の実施の形態１である携帯電話機に用いられるリチウム二次電池の正極の一部分を示す模式拡大図である。
【符号の説明】
１ 携帯端末、２ キー側筐体、３ ＬＣＤ側筐体、４ ＬＣＤ部、５ ヒンジ、６ リーダライタ、７ アンテナ、８ 電池、９ 負極、１０ 正極、
１０ａ 正極活物質、１０ｂ 導電材、１０ｃ 磁性体、１０ｄ バインダー、１１ セパレータ、１２ 負極集電体、１３ 正極集電体、１４ 電解液、
１５ ケース。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mobile phone employing a contactless ID identification system.
[0002]
[Prior art]
The ID identification system is classified into a contact type and a non-contact type by an information reading / writing means of an IC card and a device for reading data of the IC card, and a power supply means for operating a CPU, a memory, and the like built in the IC card. Is done. The contact type ID identification system is a system in which a contact terminal for reading / writing information and supplying power to a card surface is brought into contact with a card reader / writer to exchange data with the card reader / writer and supply power to a CPU and a memory. is there.
On the other hand, in recent years, a non-contact type ID identification system which is also considered to be mounted on a mobile phone and is expected to be applied to electronic money or the like performs information transfer and power supply by applying the principle of electromagnetic induction. . This non-contact type ID identification system generally includes a non-contact type IC card and a reader / writer, and power is supplied to the IC card and data is exchanged by the principle of electromagnetic induction only by bringing the IC card close to the reader / writer. An antenna composed of an electromagnetic induction loop coil is installed inside the reader / writer. In a non-contact type IC card, a semiconductor chip such as a CPU and a memory, an electromagnetic induction coil, a data input / output terminal, and the like are provided on a card base made of vinyl chloride resin (PVC), ABS resin, polyethylene terephthalate (PET), or the like. The IC card receives the magnetic flux emitted from the antenna incorporated in the reader / writer by the electromagnetic induction coil of the IC card, and exchanges data between the IC card and the reader / writer or supplies power to the CPU and the memory.
[0003]
[Problems to be solved by the invention]
As described above, since the non-contact type ID identification system uses the principle of electromagnetic induction to perform data exchange and power supply between an IC card and a reader / writer, a disturbance that disturbs electromagnetic induction (from outside the system). (Magnetic field), data exchange and power supply become insufficient, and transmission / reception between the reader / writer and the IC card may be disturbed. In a mobile phone adopting a non-contact type ID identification system, the above-mentioned reader / writer and a battery as a power supply are built in, but the battery generates electromagnetic waves from the entire power generation body including a terminal during discharging. Electromagnetic waves have affected reader antennas for contactless IC cards. As a result, there has been a problem that data exchange and power supply between the reader / writer and the IC card become insufficient, and transmission / reception is disturbed. As a battery of a mobile phone, a lithium secondary battery having a high discharge capacity and an initial efficiency is widely used. For example, in Patent Document 1, as a positive electrode active material forming a positive electrode of a lithium secondary battery, cobalt secondary battery is used. Lithium oxide (LiCoO 2 ) was used, and no magnetic material was included. In Patent Document 2, graphite is used as the negative electrode active material, and no magnetic material is included. For this reason, the battery itself has no means for shielding electromagnetic waves generated during discharging.
[0004]
[Patent Document 1]
JP 2003-36848 A [Patent Document 2]
JP-A-2002-279988
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. In a mobile phone adopting a non-contact type ID identification system, a non-contact type IC card antenna using a battery built in the mobile phone is used. The purpose is to eliminate the effects.
[0006]
[Means for Solving the Problems]
A mobile phone according to the present invention includes: a reader / writer having an antenna formed of an electromagnetic induction loop coil for exchanging information with an IC card having a built-in electromagnetic induction coil; The magnetic material is contained in one or both of the material and the negative electrode material. Thus, a magnetic body that shields electromagnetic waves generated from the entire power generation main body during discharge of the battery can be obtained in the battery, so that it is possible to eliminate the influence of the battery on the antenna.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1 FIG.
An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1A and 1B are perspective views schematically showing a mobile phone according to Embodiment 1 of the present invention, wherein FIG. 1A is a view from the LCD unit side of an LCD-side housing, and FIG. It is the figure seen from the other side of a part. A mobile terminal 1 as a mobile phone according to the present embodiment includes a key-side housing 2 for performing key operations and an LCD-side housing 3 having an LCD unit 4 as a display unit. It is connected as much as possible. The mobile phone according to the present embodiment employs a non-contact ID identification system. The non-contact type ID identification system includes a non-contact type IC card (not shown; hereinafter, abbreviated as an IC card) and a reader / writer 6. Power supply and data exchange. In the portable terminal 1, the reader / writer 6 is housed in the LCD-side housing 3, and an antenna 7 composed of an electromagnetic induction loop coil is installed therein. In the IC card, a semiconductor chip such as a CPU and a memory, an electromagnetic induction coil, a data input / output terminal, and the like are built in a card base made of vinyl chloride resin (PVC), ABS resin, polyethylene terephthalate (PET), or the like. The magnetic flux emitted from the antenna 7 by the electromagnetic induction coil of the IC card is received, and data is exchanged between the IC card and the reader / writer 6 or power is supplied to the CPU and the memory.
[0008]
A battery 8 as a power supply of the portable terminal 1 is housed inside the key-side housing 2. The structure of battery 8 in the present embodiment will be described with reference to FIGS. FIG. 3 is a schematic enlarged view showing a detailed configuration of a part of the positive electrode 10 indicated by a dotted block III in FIG. The battery 8 used in the present embodiment is a lithium secondary battery as shown in FIG. 2, and its structure is the same as a general lithium secondary battery. That is, a case composed of an aluminum can or the like in which the negative electrode 9 and the positive electrode 10, a separator 11 made of a polyolefin-based porous film, a negative electrode current collector 12, a positive electrode current collector 13, a propylene carbonate-based electrolyte solution 14, and the like are combined. 15 to be housed. In the present embodiment, as shown in FIG. 3, the positive electrode 10 includes a positive electrode active material 10a such as lithium cobalt oxide (LiCoO 2 ), a conductive material 10b such as graphite, Li 1-x FeO 2 , and Li 1-x CrO. 2, Li 1-x NiO 2 and lithium metal oxides in which the magnetic body 10c, and is configured from binder 10d such as polyvinylidene fluoride. A method for manufacturing the positive electrode 10 will be briefly described. About 80 parts by weight of the positive electrode active material 10a, 1 to 5 parts by weight of the magnetic material 10c are mixed, and about 10 parts by weight of the conductive material 10b and about 5 parts by weight of the binder 10d are dispersed in 2-methylpyrrolidone. The kneaded paste was adjusted, applied to an aluminum foil, dried, and pressed at a predetermined pressure to form a positive electrode 10. On the other hand, as the negative electrode 9, for example, a graphite-based carbon material is used, and graphite as a negative electrode active material is made of lithium metal oxide such as a magnetic material such as Li 1-x FeO 2 , Li 1-x CrO 2 , or Li 1-x NiO 2. Was mixed in. As described above, in the present embodiment, substantially the entire positive electrode 10 and the entire negative electrode 9, that is, specifically, over the entire area of the positive electrode 10 and the negative electrode 9, and over the entire thickness thereof, The magnetic material 10c, which is a lithium metal oxide, is mixed uniformly so that the entirety of the positive electrode 10 and the negative electrode 9 has magnetism.
[0009]
In this embodiment, the positive electrode active material 10a and the negative electrode active material, Li 1-x FeO 2, Li 1-x CrO 2, Li 1-x NiO lithium metal oxides such as 2 as a magnetic material of the battery 8 However, the magnetic material to be mixed is not limited to this, and a metal oxide such as Fe 2 O 3 , Cr 2 O 3 , and Ni 2 O 3 may be used. For example, in the case of Li 0.5 Fe 2.5 O 4 , the saturation magnetization is 0.39 Wb / m 2, which is one of the most magnetic substances among metal oxides. Further, in the present embodiment, the magnetic material is mixed in both the positive electrode material and the negative electrode material, but the magnetic material may be mixed in either one. In any case, it is desirable to mix them in a range that does not significantly affect the performance of the battery 8 such as the charge capacity and the discharge capacity.
[0010]
As described above, in the first embodiment, the reader / writer 6 which employs the non-contact type ID identification system and has the antenna 7 composed of the electromagnetic induction loop coil for exchanging information with an IC card having a built-in electromagnetic induction coil is provided. In the portable terminal 1 in which the battery 8 is built, since the positive electrode material and the negative electrode material of the battery 8 include a magnetic material, the electromagnetic waves generated from the entire power generation body during the discharge of the battery 8 are applied to the entire positive electrode 10 and the negative electrode 9. The magnetic body 10c that shields the IC card antenna can be obtained, and the influence of electromagnetic waves on the IC card antenna 7 (attenuation of magnetic flux) can be eliminated. This prevents the data exchange and the power supply between the reader / writer 6 and the IC card from becoming insufficient, thereby enabling normal transmission and reception. In addition, since the magnetic material is mixed with the positive electrode active material 10a and the negative electrode active material which occupy most (about 80 parts by weight) of the positive electrode material and the negative electrode material of the battery 8, the positive electrode 10 and the negative electrode 9 are formed. The battery 8 can be provided with a function of shielding electromagnetic waves without having a significant effect on the battery. Further, since a lithium secondary battery is used as the battery 8, the battery 8 has a high discharge capacity and an initial efficiency, and can be obtained at a low price because it is widely used. Furthermore, Li 1-x FeO 2, Li 1-x CrO 2, Li 1-x NiO lithium metal oxides such as 2 or Fe 2 O 3, Cr 2 O 3, Ni 2 O 3 or the like of the metal oxide as a magnetic material By using the material, an effect of shielding electromagnetic waves can be obtained by mixing only 1 to 5 parts by weight of the positive electrode active material 10a or the negative electrode active material.
[0011]
【The invention's effect】
As described above, according to the present invention, it is possible to obtain in the battery a magnetic material that shields electromagnetic waves generated from the entire power generation main body during discharging of the battery, and thus it is possible to eliminate the influence of the battery on the antenna. . As a result, it is possible to prevent the data exchange and the power supply between the reader / writer and the IC card from becoming insufficient, thereby enabling normal transmission and reception.
[Brief description of the drawings]
FIG. 1 is a perspective view schematically showing a mobile phone according to a first embodiment of the present invention.
FIG. 2 is a sectional view showing a lithium secondary battery used in the mobile phone according to the first embodiment of the present invention.
FIG. 3 is a schematic enlarged view showing a part of a positive electrode of a lithium secondary battery used in the mobile phone according to the first embodiment of the present invention.
[Explanation of symbols]
1 mobile terminal, 2 key side housing, 3 LCD side housing, 4 LCD section, 5 hinge, 6 reader / writer, 7 antenna, 8 battery, 9 negative electrode, 10 positive electrode,
10a positive electrode active material, 10b conductive material, 10c magnetic material, 10d binder, 11 separator, 12 negative electrode current collector, 13 positive electrode current collector, 14 electrolyte,
15 cases.

Claims (5)

電磁誘導コイルを内蔵したＩＣカードと情報交換を行うための電磁誘導ループコイルよりなるアンテナを有するリーダライタと、電源である電池を内蔵した携帯電話機において、前記電池の正極材料及び負極材料のいずれか一方または両方に磁性材料を含むことを特徴とする携帯電話機。In a reader / writer having an antenna formed of an electromagnetic induction loop coil for exchanging information with an IC card having a built-in electromagnetic induction coil, and a mobile phone having a built-in battery as a power source, one of a positive electrode material and a negative electrode material of the battery A mobile phone characterized in that one or both of them contains a magnetic material. 請求項１記載の携帯電話機において、前記電池の正極活物質及び負極活物質の少なくも一方に前記磁性材料を混入したことを特徴とする携帯電話機。2. The mobile phone according to claim 1, wherein the magnetic material is mixed in at least one of a positive electrode active material and a negative electrode active material of the battery. 請求項１記載の携帯電話機において、前記電池としてリチウム二次電池を用いたことを特徴とする携帯電話機。The mobile phone according to claim 1, wherein a lithium secondary battery is used as the battery. 請求項３記載の携帯電話機において、磁性材料としてＬｉ１−ｘＦｅＯ２、Ｌｉ１−ｘＣｒＯ２、Ｌｉ１−ｘＮｉＯ２等のリチウム金属酸化物を用いたことを特徴とする携帯電話機。Mobile phone in the mobile phone according to claim 3, characterized by using the Li 1-x FeO 2, Li 1-x CrO 2, Li 1-x NiO lithium metal oxides such as 2 as a magnetic material. 請求項３記載の携帯電話機において、磁性材料としてＦｅ２Ｏ３、Ｃｒ２Ｏ３、Ｎｉ２Ｏ３等の金属酸化物を用いたことを特徴とする携帯電話機。In the mobile phone according to claim 3, mobile phone, characterized by using Fe 2 O 3, Cr 2 O 3, Ni metal oxides such as 2 O 3 as a magnetic material.
JP2003146808A 2003-05-23 2003-05-23 Portable telephone Pending JP2004349179A (en)

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