JP2004247995A - Mobile telephone set - Google Patents

Mobile telephone set Download PDF

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Publication number
JP2004247995A
JP2004247995A JP2003036116A JP2003036116A JP2004247995A JP 2004247995 A JP2004247995 A JP 2004247995A JP 2003036116 A JP2003036116 A JP 2003036116A JP 2003036116 A JP2003036116 A JP 2003036116A JP 2004247995 A JP2004247995 A JP 2004247995A
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Prior art keywords
secondary battery
fuel cell
mobile phone
main control
control unit
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JP2003036116A
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Japanese (ja)
Inventor
Yoshihiro Tanno
芳浩 丹野
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Toshiba Corp
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Toshiba Corp
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Priority to JP2003036116A priority Critical patent/JP2004247995A/en
Publication of JP2004247995A publication Critical patent/JP2004247995A/en
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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
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
    • 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
    • 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
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
  • Fuel Cell (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephone Function (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile telephone set in which a fuel battery and a secondary battery are switched to be used on the load conditions matching respective properties and the secondary battery can be accurately charged from the fuel battery even while the secondary battery is supplying power to a load. <P>SOLUTION: In the mobile telephone set, a switch 6 is switched to the side of a secondary battery 2 by a main control part 10 while waiting for an incoming call and the switch 6 is switched to the side of a fuel battery 1 during a call, so that the respective batteries are controlled to supply power to a sub control part 9 and the main control part 10 which are loads. Besides, a switch 4 is turned on in response to a charging control part 11 by the sub control part 9 while waiting for an incoming call, charging from the fuel battery 1 to the secondary battery 2 is controlled, and the voltage of the secondary battery 2 is measured during the sleep of the main control part 10 that is an interval of paging signals while waiting for an incoming call, to check the completion of charging. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、燃料電池および２次電池を使用した携帯電話機に関するもので、詳しくは、燃料電池および２次電池の制御に関する。
【０００２】
【従来の技術】
従来、燃料電池および２次電池を備えるハイブリッド型の電源システムが提案されている。燃料電池と２次電池の切換えは、例えば、低温で十分な性能が出ない燃料電池を考慮して、低温では２次電池を使用し、常温では燃料電池に切換えるなどの制御方法がある。
【０００３】
また、燃料電池から２次電池へ充電を行うハイブリッド型の電源システムが提案されている（例えば、特許文献１参照。）。
【０００４】
この電源システムにあっては、負荷への電力供給に関しては、燃料電池と２次電池を並列に接続して、その両方から同時に負荷へ電力を供給している。また、２次電池の充電に関しては、両電池から負荷へ電力を供給中に、燃料電池から２次電池へ充電すると共に、負荷への電力供給が終了後に、燃料電池から２次電池への充電専用の処理期間を設けている。
【０００５】
【特許文献１】
特開平１０−４０９３１号公報（第６−８頁、図１、図４、図５、図６）
【０００６】
【発明が解決しようとする課題】
ところで、燃料電池と２次電池は、それぞれの適性に合う負荷条件があるが、上述した従来の電源システムにおいては、燃料電池と２次電池を並列運転して負荷へ電力を供給しており、負荷の種類によって、燃料電池と２次電池とを切換えて使用することは何ら考慮されていない。また、２次電池の充電に関しては、燃料電池と２次電池のインピーダンスは低インピーダンスであり、この両者を並列に接続しているため、状況によっては、燃料電池から２次電池へ過電流が流れる恐れがある。更に、２次電池の充電に関して、装置の電源オフの期間に新たに充電専用の処理期間を設ける必要があり、複雑な制御となっている。
【０００７】
本発明は、上記の要望から鑑みてなされたもので、燃料電池と２次電池の並列接続を行わずに、両電池の適性にあった負荷状態により両電池を切換えて使用すること、および、負荷へ電力を供給中に負荷のタイミング状況をチェックして、最適なタイミングで燃料電池から２次電池へ充電を行うようにした携帯電話機を提供することを目的とする。
【０００８】
【課題を解決するための手段】
上記目的を達成するために、本発明の携帯電話機は、燃料電池と２次電池とを備える携帯電話機において、負荷への電力供給源として、電話着信待受け期間中は前記２次電池を選択して前記負荷と接続し、通話中は前記燃料電池を選択して前記負荷と接続することを特徴とする。
【０００９】
また、本発明の携帯電話機は、燃料電池と２次電池とを備える携帯電話機において、
電話着信待受け期間中は前記２次電池と負荷とを接続し、通話中は前記燃料電池と前記負荷とを接続する手段と、前記電話着信待受け期間中に前記燃料電池から前記２次電池へ充電を行う手段とを具備することを特徴とする。
【００１０】
また、本発明の携帯電話機は、燃料電池と２次電池とを備える携帯電話機において、
前記携帯電話機全体を制御するメイン制御手段と、初期状態では前記２次電池からの電力を受けて作動し、前記メイン制御手段への電力供給および前記燃料電池から前記２次電池への充電を制御するサブ制御手段とを有し、前記サブ制御手段は、電話着信待受け期間中のページング信号に同期して、前記メイン制御手段を前記２次電池に接続して能動状態にし、能動状態にある前記メイン制御手段は、電話網からの当該携帯電話機への着信を受信した時は前記２次電池に代えて前記燃料電池からの電力を受けるように電池切り換えを行い、前記着信を受信しない時は前記２次電池からの電力を受けないスリープ状態に遷移することを特徴とする。
【００１１】
【発明の実施の形態】
以下、本発明に係る携帯電話機の実施の形態について図面を参照して説明する。
【００１２】
図１〜図３は、本発明を携帯電話機に適用した実施の形態を示し、図１は携帯電話機の電源系統図、図２（ａ）はメイン制御部のブロック図、図２（ｂ）はサブ制御部のブロック図、図３は電源制御のタイムチャートである。
【００１３】
本発明を適用した携帯電話機の電源系統の基本部分は、図１に示すように、燃料電池１、２次電池２、ダイオード３、スイッチ４、抵抗５、スイッチ６、電源キー７、スイッチ８、サブ制御部９、メイン制御部１０などで構成している。
【００１４】
このメイン制御部１０の基本部分は、図２（ａ）に示す無線部２１、ＣＰＵ２２、メモリ２３、Ｉ／Ｏ２４などで構成している。
【００１５】
また、サブ制御部９の基本部分は、図２（ｂ）に示す充電制御部３１、クロック部３２などで構成している。
【００１６】
図１の燃料電池１は、例えば、メタノールを直接、電池に投入して電流を取り出す直接メタノール型燃料電池である。この直接メタノール型燃料電池は、メタノールから水素を取り出す改質器等が不要であることから小型軽量化が進み、携帯電話機等の小型の機器にも使われるようになってきた。２次電池２は、通常のリチウム電池などである。
【００１７】
燃料電池１の＋極は、ダイオード３、スイッチ４、抵抗５を経由して、２次電池２の＋極に接続され、燃料電池１の−極は２次電池２の−極と接続されている。そして、スイッチ４をＯＮすることにより燃料電池１から２次電池２へ充電が行われる。ダイオード３は、逆流防止用ダイオードである。スイッチ４はトランジスタスイッチで構成され、サブ制御部９からの充電制御信号１１によってオン・オフが制御される。抵抗５は充電時の電流を制限するもので、過電流が流れることを防止する。
【００１８】
スイッチ６は、燃料電池１と２次電池２のいずれかを選択するためのスイッチであり、メイン制御部１０からの電池切換信号１３によっていずれかの電池が選択される。初期状態では、スイッチ６は２次電池２を選択するように設定されている。そして、選択された電池からの電流は負荷であるサブ制御部９とメイン制御部１０へ供給される。電源キー７は、携帯電話機全体の電源オン・オフ用であり、使用者によりオン・オフされる。
【００１９】
スイッチ８は、メイン制御部１０への電源供給するためのスイッチであり、サブ制御部９又はメイン制御部１０からのメインオン信号１２、メインオフ信号１４によってオン・オフが制御される。初期状態にあってはスイッチ８は、オン状態になってメイン制御部１０と接続されている。
【００２０】
図２のサブ制御部９の充電制御部３１は、スイッチ４のオン・オフ制御するための充電制御信号１１を出力する。この充電制御信号１１により燃料電池１から２次電池２への充電を開始する。また、充電制御部３１は、スイッチ６およびスイッチ７を経由して供給される２次電池２の電圧をチェックしながら充電制御を行う。
【００２１】
サブ制御部９のクロック部３２は、電話着信の待受け中に、電話網から到来するページング信号に同期して、ページング信号が到来する直前に、スリープ状態（携帯電話機を使用していない時は消費電力を抑えるために制御部や表示部などの電源を切断しておく）にあるメイン制御部１０をオン状態に切換えるために、メインオン信号１２を出力してスイッチ８をオンにして、メイン制御部１０に電源を供給する。
【００２２】
図２のメイン制御部１０の無線部２１は、電話網との間で無線信号の送受信を行う。ＣＰＵ２２は、携帯電話機全体の制御を行い、メモリ２３は、ＣＰＵが動作するための制御プログラムや、各種の情報を記憶するワークメモリが格納される。Ｉ／Ｏ２４は、携帯電話機に設けられるキーボード（図示せず）とのインタフェース、表示部（図示せず）とのインタフェースを司る。また、本発明ではＣＰＵ２２からの電池切換信号１３をスイッチ６に出力して燃料電池１と２次電池２の切換えを行う。
【００２３】
次に、本発明の動作について、図３のタイムチャートを用いて説明する。まず、携帯電話機の使用者により、電源キー７が押されて携帯電話機に電源が投入されると、初期状態ではスイッチ６は２次電池２を選択した状態に設定されているためサブ制御部９が直ちに稼動する。また、スイッチ８は、初期状態ではオンであるため、メイン制御部１０を同時に稼動する。
【００２４】
メイン制御部１０が稼動すると、携帯電話網との間で、位置登録（無線局との間で交信）および加入者認証（加入者ネットワークへの接続）等を行い、その後、待受け状態になる。
【００２５】
図３のタイミング図は、メイン制御部１０が待受け状態から着信を受ける状態を示す。メイン制御部１０は待受け状態になると、数秒経過後、メインオフ信号１４をスイッチ８に出力して、スイッチ８をオフにすることにより、メイン制御部１０自身がスリープ状態に遷移する。
【００２６】
次に、待受け状態にあって、携帯電話網から携帯電話機に対し、電話呼び出しを行うページング信号Ｐ１、Ｐ２、Ｐ３、…が周期ｎの間隔で到来している。
【００２７】
このページング信号Ｐ１、Ｐ２、Ｐ３、…に同期して、サブ制御部９のクロック部３２は動作しており、ページング信号Ｐ１の直前のタイミングｔ１において、クロック部３２からメインオン信号１２がスイッチ８に出力され、スイッチ８がオンになる。これにより、メイン制御部１０に電源が供給され、スリープ状態から能動状態に遷移する。そこで、メイン制御部１０は、このページング信号Ｐ１を受信して自身の携帯電話機への着信がないかをチェックし、着信がなければ、再びメインオフ信号１４をスイッチ８に出力して、スイッチ８をオフ（タイミングｔ２）にして再びスリープ状態に遷移する。
【００２８】
サブ制御部９およびメイン制御部１０は、次のページング信号Ｐ２に対しても、同様の動作を実行して（タイミングｔ４、ｔ５）、着信がなければ同様にメイン制御部はスリープ状態に遷移する。
【００２９】
次のページング信号Ｐ３を受信し、タイミングｔ７でメイン制御部１０が能動状態に遷移した時に携帯電話網から着信を確認した場合、メイン制御部１０は制御用・通話用チャネルの設定を行い、通話状態にする。それと共に、メイン制御部１０は電池切換信号１３をスイッチ６に出力して、スイッチ６を燃料電池１に接続するように切り換える。従って、携帯電話機が通話状態になるとメイン制御部１０およびサブ制御部９は、燃料電池１から電源の供給を受けて動作する。
【００３０】
ところで、メイン制御部１０の負荷電流は大きいため、サブ制御部９とメイン制御部１０を合わせた負荷電流は、図３に示すスイッチ８のオフ状態では小さい値となり、オン状態では大きい値となる。よって、待受け中にあっては、スイッチ８がオン・オフを繰り返しているため、負荷変動が大きい状態で動作する。一方、通話中では負荷電流は大きいが、負荷変動は小さい状態で動作する。
【００３１】
ところで、２次電池２は、負荷変動に強い特性を有し、燃料電池１は、負荷変動に弱い特性を有する。よって、負荷変動の状態によって、この両者の電池を切換えて使用することにより、電池性能を有効に使うことができる。
【００３２】
即ち、本発明の実施形態の携帯電話機によれば、ページング信号を処理して電話網に接続するまでは負荷変動の大きいが、その期間は負荷変動に強い特性を持つ２次電池２で作動する。一方、通話中では負荷変動が小さく、その期間は負荷変動が弱い特性を持つ燃料電池１で作動するよう構成されていることから、２次電池と燃料電池の性能を有効に活用して使用することが出来る。
【００３３】
次に、２次電池２の充電制御について説明する。上述の通り待受け中は、スイッチ６は２次電池２に接続するように選択されている。一方、２次電池２の電圧は、スイッチ８のオン・オフによる負荷変動に対応して、図３の電圧波形に示すように、スイッチ８がオンになったタイミングｔ１、ｔ４、ｔ７からしばらくの期間は、電圧が低下する方向で変動する。また、スイッチ８がオフになったタイミングｔ２、ｔ５からしばらくの期間は、電圧が上昇する方向で変動し、タイミングｔ３、ｔ６で安定化する。
【００３４】
サブ制御部９の充電制御部３１は、待受け中において、充電制御信号１１をスイッチ４に出力して、スイッチ４をオンにして、燃料電池１から２次電池２への充電ラインを形成して充電を行なわせる。これにより、２次電池２は、負荷へ電力を供給しながら、燃料電池１から充電を受けることが出来る。ただし、スイッチ８がオンの時は、負荷電流が大きいため、結果的に、燃料電池１から２次電池２への充電は行われず、スイッチ８がオフとなって軽負荷の時に燃料電池１から２次電池２への充電が行われる。
【００３５】
また、サブ制御部９の充電制御部３１は、スイッチ６およびスイッチ７を経由して供給される２次電池２の電圧をチェックして、充電状況を確認する。この時、２次電池２の電圧は、前述したように負荷変動により変動しているので、充電制御部３１は、図３に示すタイミングｔ３〜ｔ４の安定期間およびｔ６〜ｔ７の安定期間において、電圧を測定する。そして、充電制御部３１は、燃料電池１から２次電池２への充電が進んで、この充電電圧が所定値に達したら充電が完了したと見なして、充電制御信号１１をスイッチ４に出力して、スイッチ４をオフにして充電を終了させる。
【００３６】
上記したように、本発明の実施形態によれば、待受け期間中は平均消費電流が小さく、また、負荷変動が大きいが、この期間に、燃料電池１から２次電池２へ正確に充電を行うことができる。これにより、従来のように並列運転による過電流充電の恐れをなくすことができる。また、携帯電話機の電源をオフにした後に、新たに充電専用の処理期間を設けることが不要となる。
【００３７】
【発明の効果】
このように、本発明によれば、燃料電池と２次電池の負荷変動特性に合わせて、負荷の状態によって、この電池を切換えて使用することにより、電池性能を有効に発揮させることができる。
【００３８】
また、携帯電話機の電源がオン状態の使用中においても、待受け期間中に燃料電池から２次電池へ正確な充電を行うことができる。
【図面の簡単な説明】
【図１】本発明に関わる実施の形態を示す携帯電話機の電源系統図。
【図２】図１に示した携帯電話機のサブ制御部およびメイン制御部の詳細回路図。
【図３】図１に示した携帯電話機の電池切換えおよび充電制御のタイムチャート。
【符号の説明】
１ 燃料電池
２ ２次電池
３ ダイオード
４、６、８ スイッチ
７ 電源キー
９ サブ制御部
１０ メイン制御部
２１ 無線部
２２ ＣＰＵ
２３ メモリ
２４ Ｉ／Ｏ
３１ 充電制御部
３２ クロック部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mobile phone using a fuel cell and a secondary battery, and more particularly, to control of a fuel cell and a secondary battery.
[0002]
[Prior art]
Conventionally, a hybrid power supply system including a fuel cell and a secondary battery has been proposed. For switching between the fuel cell and the secondary battery, for example, in consideration of a fuel cell that does not provide sufficient performance at low temperatures, there is a control method of using a secondary battery at low temperatures and switching to a fuel cell at normal temperature.
[0003]
In addition, a hybrid power supply system that charges a secondary battery from a fuel cell has been proposed (for example, see Patent Document 1).
[0004]
In this power supply system, with respect to power supply to a load, a fuel cell and a secondary battery are connected in parallel, and power is supplied to the load from both at the same time. Regarding charging of the secondary battery, while the power is being supplied from both batteries to the load, the fuel cell is charged to the secondary battery, and after the power supply to the load is completed, the fuel cell is charged to the secondary battery. A dedicated processing period is provided.
[0005]
[Patent Document 1]
JP-A-10-40931 (Pages 6-8, FIGS. 1, 4, 5, and 6)
[0006]
[Problems to be solved by the invention]
By the way, although the fuel cell and the secondary battery have load conditions suitable for their respective suitability, in the above-described conventional power supply system, the fuel cell and the secondary battery are operated in parallel to supply power to the load. Switching between a fuel cell and a secondary battery depending on the type of load is not considered at all. Regarding charging of the secondary battery, the impedance of the fuel cell and the secondary battery is low, and since both are connected in parallel, depending on the situation, an overcurrent flows from the fuel cell to the secondary battery. There is fear. Further, regarding the charging of the secondary battery, it is necessary to provide a new processing period exclusively for charging during the power-off period of the apparatus, which is a complicated control.
[0007]
The present invention has been made in view of the above-described demands, and does not perform parallel connection of a fuel cell and a secondary battery, and uses both batteries by switching between them according to a load state suitable for both batteries, and It is an object of the present invention to provide a mobile phone that checks the timing of a load while supplying power to the load and charges the fuel cell to the secondary battery at an optimal timing.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a mobile phone according to the present invention includes a mobile phone including a fuel cell and a secondary battery, wherein the secondary battery is selected as a power supply source for a load during a call waiting period. The fuel cell is connected to the load, and during a call, the fuel cell is selected and connected to the load.
[0009]
Further, the mobile phone of the present invention is a mobile phone including a fuel cell and a secondary battery,
Means for connecting the secondary battery and the load during a call waiting period, means for connecting the fuel cell and the load during a call, and charging the fuel cell to the secondary battery during the call waiting period Means for performing the following.
[0010]
Further, the mobile phone of the present invention is a mobile phone including a fuel cell and a secondary battery,
A main control unit for controlling the whole of the mobile phone, and in an initial state, operating by receiving electric power from the secondary battery, and controlling power supply to the main control unit and charging of the secondary battery from the fuel cell; Sub-control means, the sub-control means connects the main control means to the secondary battery and activates the main control means in synchronization with a paging signal during a telephone incoming call waiting period. The main control means performs battery switching so as to receive power from the fuel cell instead of the secondary battery when receiving an incoming call from the telephone network to the mobile phone, and when not receiving the incoming call, A transition is made to a sleep state in which power from the secondary battery is not received.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of a mobile phone according to the present invention will be described with reference to the drawings.
[0012]
1 to 3 show an embodiment in which the present invention is applied to a mobile phone. FIG. 1 is a power supply system diagram of the mobile phone, FIG. 2 (a) is a block diagram of a main control unit, and FIG. FIG. 3 is a block diagram of the sub control unit, and FIG. 3 is a time chart of power control.
[0013]
As shown in FIG. 1, the basic parts of the power supply system of a mobile phone to which the present invention is applied include a fuel cell 1, a secondary battery 2, a diode 3, a switch 4, a resistor 5, a switch 6, a power key 7, a switch 8, It comprises a sub-control unit 9, a main control unit 10, and the like.
[0014]
The basic part of the main control unit 10 includes a radio unit 21, a CPU 22, a memory 23, an I / O 24, and the like shown in FIG.
[0015]
The basic part of the sub-control unit 9 includes a charge control unit 31, a clock unit 32, and the like shown in FIG.
[0016]
The fuel cell 1 shown in FIG. 1 is, for example, a direct methanol fuel cell in which methanol is directly supplied to the cell to extract current. Since the direct methanol fuel cell does not require a reformer or the like for extracting hydrogen from methanol, the size and weight of the fuel cell have been reduced, and the direct methanol fuel cell has been used for small devices such as mobile phones. The secondary battery 2 is a normal lithium battery or the like.
[0017]
The positive pole of the fuel cell 1 is connected to the positive pole of the secondary battery 2 via the diode 3, the switch 4, and the resistor 5, and the negative pole of the fuel cell 1 is connected to the negative pole of the secondary battery 2. I have. When the switch 4 is turned on, the fuel cell 1 charges the secondary battery 2. The diode 3 is a backflow prevention diode. The switch 4 is configured by a transistor switch, and is turned on / off by a charge control signal 11 from the sub control unit 9. The resistor 5 limits the current during charging, and prevents an overcurrent from flowing.
[0018]
The switch 6 is a switch for selecting one of the fuel cell 1 and the secondary battery 2, and one of the batteries is selected by a battery switching signal 13 from the main control unit 10. In an initial state, the switch 6 is set to select the secondary battery 2. Then, the current from the selected battery is supplied to the sub control unit 9 and the main control unit 10, which are loads. The power key 7 is for turning on / off the power of the entire mobile phone, and is turned on / off by the user.
[0019]
The switch 8 is a switch for supplying power to the main control unit 10, and its on / off is controlled by a main on signal 12 and a main off signal 14 from the sub control unit 9 or the main control unit 10. In the initial state, the switch 8 is turned on and connected to the main control unit 10.
[0020]
The charge control unit 31 of the sub-control unit 9 shown in FIG. 2 outputs a charge control signal 11 for controlling on / off of the switch 4. The charge from the fuel cell 1 to the secondary battery 2 is started by the charge control signal 11. The charge control unit 31 performs charge control while checking the voltage of the secondary battery 2 supplied via the switches 6 and 7.
[0021]
The clock unit 32 of the sub-control unit 9 synchronizes with the paging signal arriving from the telephone network while waiting for an incoming call and immediately before the paging signal arrives, the sleep state (consumption when the mobile phone is not used). In order to switch on the main control unit 10 in the control unit and the display unit in order to suppress the power, the main control unit 10 outputs the main on signal 12 and turns on the switch 8 to turn on the main control unit. Power is supplied to the unit 10.
[0022]
The wireless unit 21 of the main control unit 10 shown in FIG. 2 transmits and receives wireless signals to and from the telephone network. The CPU 22 controls the entire mobile phone, and the memory 23 stores a control program for operating the CPU and a work memory for storing various information. The I / O 24 controls an interface with a keyboard (not shown) provided on the mobile phone and an interface with a display unit (not shown). In the present invention, the battery switching signal 13 from the CPU 22 is output to the switch 6 to switch between the fuel cell 1 and the secondary battery 2.
[0023]
Next, the operation of the present invention will be described with reference to the time chart of FIG. First, when the user of the mobile phone presses the power key 7 to turn on the mobile phone, the switch 6 is set to the state in which the secondary battery 2 is selected in the initial state. Works immediately. Since the switch 8 is turned on in the initial state, the main control unit 10 is simultaneously operated.
[0024]
When the main control unit 10 operates, location registration (communication with a radio station) and subscriber authentication (connection to the subscriber network) are performed with the cellular phone network, and thereafter, a standby state is set.
[0025]
The timing chart of FIG. 3 shows a state in which the main control unit 10 receives a call from a standby state. When the main control unit 10 enters the standby state, after a lapse of several seconds, the main control unit 10 outputs the main-off signal 14 to the switch 8 and turns off the switch 8, whereby the main control unit 10 itself transitions to the sleep state.
[0026]
Next, in a standby state, paging signals P1, P2, P3,... For making a telephone call from the mobile phone network to the mobile phone arrive at intervals of a cycle n.
[0027]
The clock section 32 of the sub-control section 9 operates in synchronization with the paging signals P1, P2, P3,..., And at a timing t1 immediately before the paging signal P1, the clock section 32 outputs the main ON signal 12 from the switch 8 And the switch 8 is turned on. As a result, power is supplied to the main control unit 10, and the main control unit 10 transitions from the sleep state to the active state. Therefore, the main control unit 10 receives the paging signal P1 and checks whether there is an incoming call to its own mobile phone. If there is no incoming call, the main control unit 10 outputs the main off signal 14 to the switch 8 again, and Is turned off (timing t2) and the state transits to the sleep state again.
[0028]
The sub control unit 9 and the main control unit 10 perform the same operation for the next paging signal P2 (timing t4, t5), and if there is no incoming call, the main control unit similarly shifts to the sleep state. .
[0029]
When receiving the next paging signal P3 and confirming an incoming call from the mobile phone network when the main control unit 10 transitions to the active state at the timing t7, the main control unit 10 sets a control / communication channel and performs a call. State. At the same time, the main control unit 10 outputs the battery switching signal 13 to the switch 6 and switches the switch 6 to connect to the fuel cell 1. Therefore, when the mobile phone is in a talking state, the main control unit 10 and the sub-control unit 9 receive power from the fuel cell 1 and operate.
[0030]
By the way, since the load current of the main control unit 10 is large, the combined load current of the sub-control unit 9 and the main control unit 10 has a small value when the switch 8 shown in FIG. . Therefore, during standby, the switch 8 is repeatedly turned on and off, so that the switch 8 operates with a large load fluctuation. On the other hand, during a call, the operation is performed in a state where the load current is large but the load fluctuation is small.
[0031]
Incidentally, the secondary battery 2 has characteristics that are strong against load fluctuations, and the fuel cell 1 has characteristics that are weak against load fluctuations. Therefore, by switching between these two batteries depending on the state of the load fluctuation, the battery performance can be used effectively.
[0032]
In other words, according to the mobile phone of the embodiment of the present invention, although the load fluctuation is large until the paging signal is processed and connected to the telephone network, the mobile phone operates with the secondary battery 2 having the characteristic of being strong against the load fluctuation during that period. . On the other hand, during a call, the load fluctuation is small, and during that period, the system is configured to operate with the fuel cell 1 having the characteristic that the load fluctuation is weak, so that the performance of the secondary battery and the fuel cell is effectively utilized for use. I can do it.
[0033]
Next, charging control of the secondary battery 2 will be described. As described above, during standby, the switch 6 is selected to be connected to the secondary battery 2. On the other hand, the voltage of the secondary battery 2 corresponds to the load fluctuation due to the on / off of the switch 8, and as shown in the voltage waveform of FIG. 3, the timing from the timing t1, t4, t7 when the switch 8 is turned on for a while. The period varies in the direction in which the voltage decreases. In addition, for a period of time after the timings t2 and t5 when the switch 8 is turned off, the voltage fluctuates in a rising direction and stabilizes at the timings t3 and t6.
[0034]
During standby, the charge control unit 31 of the sub-control unit 9 outputs the charge control signal 11 to the switch 4, turns on the switch 4, and forms a charge line from the fuel cell 1 to the secondary battery 2. Charge the battery. Thereby, the secondary battery 2 can receive charging from the fuel cell 1 while supplying power to the load. However, when the switch 8 is on, the load current is large, so that the fuel cell 1 does not charge the secondary battery 2 as a result, and when the switch 8 is off and the load is light, the fuel cell 1 The charging of the secondary battery 2 is performed.
[0035]
The charging control unit 31 of the sub-control unit 9 checks the voltage of the secondary battery 2 supplied via the switches 6 and 7 to confirm the charging status. At this time, since the voltage of the secondary battery 2 fluctuates due to the load fluctuation as described above, the charging control unit 31 performs the operation in the stable period from the timing t3 to t4 and the stable period from t6 to t7 shown in FIG. Measure the voltage. Then, the charge control unit 31 outputs the charge control signal 11 to the switch 4 assuming that the charging from the fuel cell 1 to the secondary battery 2 has progressed and the charging voltage has reached a predetermined value, that the charging has been completed. Then, the switch 4 is turned off to terminate the charging.
[0036]
As described above, according to the embodiment of the present invention, the average current consumption is small during the standby period and the load fluctuation is large, but during this period, the fuel cell 1 accurately charges the secondary battery 2. be able to. This can eliminate the risk of overcurrent charging due to parallel operation as in the related art. Further, it is not necessary to provide a new charging-only processing period after the power of the mobile phone is turned off.
[0037]
【The invention's effect】
As described above, according to the present invention, the performance of the battery can be effectively exhibited by switching and using this battery depending on the load condition in accordance with the load fluctuation characteristics of the fuel cell and the secondary battery.
[0038]
In addition, even when the mobile phone is in a power-on state, the fuel cell can accurately charge the secondary battery during the standby period.
[Brief description of the drawings]
FIG. 1 is a power supply system diagram of a mobile phone according to an embodiment of the present invention.
FIG. 2 is a detailed circuit diagram of a sub-control unit and a main control unit of the mobile phone shown in FIG.
FIG. 3 is a time chart of battery switching and charge control of the mobile phone shown in FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Fuel cell 2 Secondary battery 3 Diode 4, 6, 8 Switch 7 Power key 9 Sub-control unit 10 Main control unit 21 Radio unit 22 CPU
23 memory 24 I / O
31 charge control unit 32 clock unit

Claims (6)

燃料電池と２次電池とを備える携帯電話機において、
負荷への電力供給源として、電話着信待受け期間中は前記２次電池を選択して前記負荷と接続し、通話中は前記燃料電池を選択して前記負荷と接続することを特徴とする携帯電話機。In a mobile phone including a fuel cell and a secondary battery,
A mobile phone as a power supply source for a load, wherein the secondary battery is selected and connected to the load during an incoming call waiting period, and the fuel cell is selected and connected to the load during a call. . 前記電話着信待受け期間中に、前記燃料電池から前記２次電池への充電を行うことを特徴とする請求項１記載の携帯電話機。The mobile phone according to claim 1, wherein the secondary battery is charged from the fuel cell during the call waiting period. 燃料電池と２次電池とを備える携帯電話機において、
電話着信待受け期間中は前記２次電池と負荷とを接続し、通話中は前記燃料電池と前記負荷とを接続する手段と、
前記電話着信待受け期間中に、前記燃料電池から前記２次電池へ充電を行う手段と
を具備することを特徴とする携帯電話機。In a mobile phone including a fuel cell and a secondary battery,
Means for connecting the secondary battery and the load during a call waiting period, and connecting the fuel cell and the load during a call;
Means for charging the fuel cell to the secondary battery during the call waiting period. 燃料電池と２次電池とを備える携帯電話機において、
前記携帯電話機全体を制御するメイン制御手段と、
初期状態では前記２次電池からの電力を受けて作動し、前記メイン制御手段への電力供給および前記燃料電池から前記２次電池への充電を制御するサブ制御手段とを有し、
前記サブ制御手段は、電話着信待受け期間中のページング信号に同期して、前記メイン制御手段を前記２次電池に接続して能動状態にし、
能動状態にある前記メイン制御手段は、電話網からの当該携帯電話機への着信を受信した時は前記２次電池に代えて前記燃料電池からの電力を受けるように電池切換えを行い、前記着信を受信しない時は前記２次電池からの電力を受けないスリープ状態に遷移することを特徴とする携帯電話機。In a mobile phone including a fuel cell and a secondary battery,
Main control means for controlling the entire mobile phone,
In an initial state, it operates by receiving power from the secondary battery, and has sub-control means for controlling power supply to the main control means and charging of the secondary battery from the fuel cell,
The sub-control unit connects the main control unit to the secondary battery and activates the main control unit in synchronization with a paging signal during a telephone incoming call waiting period,
The main control means in the active state, when receiving an incoming call from the telephone network to the mobile phone, performs battery switching so as to receive power from the fuel cell instead of the secondary battery, and receives the incoming call. When no reception is performed, the mobile phone shifts to a sleep state in which power from the secondary battery is not received. 前記サブ制御部は、前記電話着信待受け期間中に、前記燃料電池と前記２次電池とを接続して、前記燃料電池から前記２次電池への充電を行うことを特徴とする請求項４記載の携帯電話機。The said sub control part connects the said fuel cell and the said secondary battery during the said telephone incoming call waiting period, and charges the said secondary battery from the said fuel cell, The characterized by the above-mentioned. Mobile phone. 前記サブ制御部は、前記電話着信待受け期間中で、且つ、前記２次電池の電圧変動が少ない期間に、前記２次電池の電圧測定を行って充電監視を行うことを特徴とする請求項４記載の携帯電話機。The said sub-control part performs the charge monitoring by performing the voltage measurement of the said secondary battery during the said telephone incoming call waiting period, and the period when the voltage fluctuation of the said secondary battery is small. The described mobile phone.
JP2003036116A 2003-02-14 2003-02-14 Mobile telephone set Pending JP2004247995A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007088804A (en) * 2005-09-22 2007-04-05 Hitachi Ltd Mobile phone
JP2008041283A (en) * 2006-08-01 2008-02-21 Matsushita Electric Ind Co Ltd Portable radio device
JP2008061097A (en) * 2006-09-01 2008-03-13 Sanyo Electric Co Ltd Portable electronic device
WO2008065934A1 (en) * 2006-11-27 2008-06-05 Kabushiki Kaisha Toshiba Electronic device
JP2009112116A (en) * 2007-10-30 2009-05-21 Kyocera Corp Portable electronic apparatus
US7729960B2 (en) 2005-03-30 2010-06-01 Kabushiki Kaisha Toshiba Communication terminal, power supply management system of the same, and charging method at the time of purchasing fuel reservoir
US7786696B2 (en) 2006-09-01 2010-08-31 Samsung Sdi Co., Ltd. Battery pack charged by external power generator and supplying discharge power to external load in parallel to external power generator
JP2011041358A (en) * 2009-08-07 2011-02-24 Kyocera Corp Portable electronic equipment
WO2014107339A1 (en) * 2013-01-04 2014-07-10 Lilliputian Systems, Inc. A fuel cell system having a safety mode
US20150214769A1 (en) * 2014-01-28 2015-07-30 Samsung Electronics Co., Ltd. Method for improving call quality during battery charging and electronic device thereof

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7729960B2 (en) 2005-03-30 2010-06-01 Kabushiki Kaisha Toshiba Communication terminal, power supply management system of the same, and charging method at the time of purchasing fuel reservoir
JP4529853B2 (en) * 2005-09-22 2010-08-25 株式会社日立製作所 Mobile phone
JP2007088804A (en) * 2005-09-22 2007-04-05 Hitachi Ltd Mobile phone
JP2008041283A (en) * 2006-08-01 2008-02-21 Matsushita Electric Ind Co Ltd Portable radio device
JP2008061097A (en) * 2006-09-01 2008-03-13 Sanyo Electric Co Ltd Portable electronic device
US7786696B2 (en) 2006-09-01 2010-08-31 Samsung Sdi Co., Ltd. Battery pack charged by external power generator and supplying discharge power to external load in parallel to external power generator
WO2008065934A1 (en) * 2006-11-27 2008-06-05 Kabushiki Kaisha Toshiba Electronic device
JP2009112116A (en) * 2007-10-30 2009-05-21 Kyocera Corp Portable electronic apparatus
JP2011041358A (en) * 2009-08-07 2011-02-24 Kyocera Corp Portable electronic equipment
WO2014107339A1 (en) * 2013-01-04 2014-07-10 Lilliputian Systems, Inc. A fuel cell system having a safety mode
US20150214769A1 (en) * 2014-01-28 2015-07-30 Samsung Electronics Co., Ltd. Method for improving call quality during battery charging and electronic device thereof
KR20150089858A (en) * 2014-01-28 2015-08-05 삼성전자주식회사 Apparatas and method for improving a quality of telephone call for charging in an electronic device
US9692241B2 (en) * 2014-01-28 2017-06-27 Samsung Electronics Co., Ltd. Method for improving call quality during battery charging and electronic device thereof
KR102154324B1 (en) * 2014-01-28 2020-09-09 삼성전자주식회사 Apparatas and method for improving a quality of telephone call for charging in an electronic device

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