JP4774981B2 - Charging device and portable electronic device - Google Patents

Charging device and portable electronic device Download PDF

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JP4774981B2
JP4774981B2 JP2005368348A JP2005368348A JP4774981B2 JP 4774981 B2 JP4774981 B2 JP 4774981B2 JP 2005368348 A JP2005368348 A JP 2005368348A JP 2005368348 A JP2005368348 A JP 2005368348A JP 4774981 B2 JP4774981 B2 JP 4774981B2
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charging device
radio wave
secondary battery
charging
supplied
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JP2007174797A (en
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郷志 木下
北斗 沢海
俊介 小嶋
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Sony Corp
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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

Description

本発明は、携帯型コンピュータ等の携帯型電子機器に適用して好適な充電装置及び携帯型電子機器に関する。   The present invention relates to a charging device and a portable electronic device suitable for being applied to a portable electronic device such as a portable computer.

現在、コンピュータの通信分野でケーブルを使用しない無線通信即ち無線ＬＡＮ（ｌｏｃａｌ ａｒｅａ ｎｅｔｗｏｒｋ）が広く利用されている。   Currently, wireless communication using no cable, that is, a wireless local area network (LAN) is widely used in the computer communication field.

この無線ＬＡＮの通信中の電波は、空間に球面波として、等方向に広がり、通信では、この電波のエネルギーが全て消費されてしまうことはない。   The radio wave during communication of the wireless LAN spreads in the same direction as a spherical wave in space, and the energy of this radio wave is not consumed in communication.

ところで、特許文献１に受波した電磁波のエネルギーを電気エネルギーに変換して、この電気エネルギーを蓄電器又は蓄電池に蓄電し、この蓄電された電気エネルギーを上位装置に供給するようにしたパッシブ電源回路が開示されている。
特開２００４−１０４９６０号公報 By the way, the passive power supply circuit which converted the energy of the electromagnetic wave received by patent document 1 into electrical energy, stored this electrical energy in a storage device or a storage battery, and supplies this stored electrical energy to a host device. It is disclosed.
JP 2004-104960 A

然しながら、携帯型のコンピュータに搭載されている２次電池は、長期間使用されない場合、自己放電により電池の容量が減少し、過放電状態に陥ってしまい、この２次電池の劣化を早めてしまう不都合があった。   However, when the secondary battery mounted on the portable computer is not used for a long period of time, the capacity of the battery is reduced due to self-discharge, resulting in an overdischarged state, which accelerates the deterioration of the secondary battery. There was an inconvenience.

本発明は、斯かる点に鑑み、無線ＬＡＮの通信中の電波のエネルギーを有効に活用し、２次電池の劣化を改善することを目的とする。   In view of such a point, an object of the present invention is to effectively utilize energy of radio waves during wireless LAN communication and to improve deterioration of a secondary battery.

本発明充電装置は、着脱可能に接続された外部充電装置から供給された電気エネルギーを、複数の組電池を含む２次電池に蓄積する充電装置であって、無線ＬＡＮで発生している電波の周波数に共振して該周波数の電磁波を受信し、受信した電磁波のエネルギーを電気エネルギーに変換する電波受信手段と、外部充電装置が接続されていない場合には、電波受信手段で変換された電気エネルギーが、２次電池に含まれる各組電池ごとに所定の順序で供給されるようにし、外部充電装置が接続されている場合には、２次電池に含まれる複数の組電池を直列接続させ、直列接続された複数の組電池に外部充電装置から電気エネルギーが供給されるようにする充電制御手段とを有するものである。 The charging device of the present invention is a charging device that accumulates electric energy supplied from an externally connected charging device in a detachable manner in a secondary battery including a plurality of assembled batteries, and is used for radio waves generated in a wireless LAN. When the electromagnetic wave receiving means that resonates with the frequency and receives the electromagnetic wave of the frequency and converts the received electromagnetic wave energy into electric energy and the external charging device is not connected, the electric energy converted by the electric wave receiving means Is supplied in a predetermined order for each assembled battery included in the secondary battery, and when an external charging device is connected, a plurality of assembled batteries included in the secondary battery are connected in series, Charging control means for supplying electric energy from an external charging device to a plurality of assembled batteries connected in series .

また、本発明携帯型電子機器は、着脱可能に接続された外部充電装置から供給された電気エネルギーを、複数の組電池を含む２次電池に蓄積する携帯型電子機器であって、無線ＬＡＮで発生している電波の周波数に共振して該周波数の電磁波を受信し、受信した電磁波のエネルギーを電気エネルギーに変換する電波受信手段と、外部充電装置が接続されていない場合には、電波受信手段で変換された電気エネルギーが、２次電池に含まれる各組電池ごとに所定の順序で供給されるようにし、外部充電装置が接続されている場合には、２次電池に含まれる複数の組電池を直列接続させ、直列接続された複数の組電池に外部充電装置から電気エネルギーが供給されるようにする充電制御手段とを設けたものである。 Further, the present invention a portable electronic device, the electric energy supplied from the external charging device, which is detachably connected to a portable electronic device for storing the secondary battery containing a plurality of assembled batteries, a wireless LAN Radio wave receiving means that resonates with the frequency of the generated radio wave and receives the electromagnetic wave of the frequency and converts the energy of the received electromagnetic wave into electric energy, and if the external charging device is not connected, the radio wave receiving means The electrical energy converted in step (b) is supplied in a predetermined order for each assembled battery included in the secondary battery, and when an external charging device is connected, a plurality of sets included in the secondary battery are included. The battery is connected in series, and charging control means is provided to allow electric energy to be supplied from an external charging device to a plurality of assembled batteries connected in series .

本発明によれば、無線ＬＡＮで発生している電波のエネルギーを有効に活用できると共に携帯型電子機器に内蔵されている２次電池をこの内部の充電装置により充電することによりこの２次電池の劣化を改善することができる。 According to the present invention, the secondary battery by a secondary battery built in a portable electronic device with the energy of the radio waves are generated in the wireless LAN can be effectively used to charge the internal charging device Can be improved.

以下図１〜図４を参照して、本発明充電装置及び携帯型電子機器を実施するための最良の形態の例につき説明する。   Hereinafter, an example of the best mode for carrying out the charging device and the portable electronic device of the present invention will be described with reference to FIGS.

図１〜図４例は、携帯型電子機器である携帯型コンピュータに本例による充電装置を内部に設けた例を示す。図１において、１は無線ＬＡＮで発生している電波の周波数例えば２．４ＧＨｚに共振して、この周波数の電磁波を受信し、この受信した電磁波のエネルギーを電気エネルギーに変換する電波受信手段を示す。   1 to 4 show an example in which a charging device according to this example is provided in a portable computer that is a portable electronic device. In FIG. 1, reference numeral 1 denotes a radio wave receiving means that resonates with a frequency of a radio wave generated in a wireless LAN, for example, 2.4 GHz, receives an electromagnetic wave of this frequency, and converts the received electromagnetic wave energy into electrical energy. .

この電波受信手段１の例としては図２に示す如く、無線ＬＡＮで発生している電波の周波数例えば２．４ＧＨｚに共振する共振回路より成る複数個のアンテナ１ａ、１ｂ…１ｎを直列に接続し、この複数個のアンテナ１ａ、１ｂ…１ｎの直列接続回路の両端に２次電池を充電するのに必要な電気エネルギー（電圧）を得る如くする。   As an example of the radio wave receiving means 1, as shown in FIG. 2, a plurality of antennas 1a, 1b... 1n consisting of resonance circuits that resonate at a frequency of radio waves generated in a wireless LAN, for example, 2.4 GHz, are connected in series. The electric energy (voltage) necessary to charge the secondary battery is obtained at both ends of the series connection circuit of the plurality of antennas 1a, 1b,.

この場合、アンテナ１ａ、１ｂ…１ｎの夫々に得られる共振電圧をＶ１、Ｖ２…Ｖｎとしたとき、この複数個のアンテナ１ａ、１ｂ…１ｎの直列接続回路の両端に得られる電圧Ｖｉｎは
Ｖｉｎ＝Ｖ１＋Ｖ２＋…＋Ｖｎ
である。 In this case, when the resonance voltages obtained for the antennas 1a, 1b... 1n are V1, V2... Vn, the voltage Vin obtained at both ends of the series connection circuit of the plurality of antennas 1a, 1b. V1 + V2 + ... + Vn
It is.

このアンテナ１ａ、１ｂ…１ｎは、例えば基板上にパターンで形成されたパターンアンテナで構成する。   The antennas 1a, 1b,..., 1n are constituted by, for example, pattern antennas formed in a pattern on a substrate.

この電波受信手段１の出力側に得られるこの電圧Ｖｉｎを、この電圧Ｖｉｎを後述する２次電池４を充電するのに適した充電電圧にするための昇圧部２に供給する。   The voltage Vin obtained on the output side of the radio wave receiving means 1 is supplied to the booster 2 for making the voltage Vin a charging voltage suitable for charging a secondary battery 4 described later.

この昇圧部２としては、例えば図３に示す如く構成する。この電波受信手段１よりのこの電圧Ｖｉｎが供給される一方の入力端子２ａをこの電波受信手段１側への逆流を防止する逆流防止用のダイオード１０を介して切換スイッチ１１の一方の固定接点１１ｂに接続し、この切換スイッチ１１の他方の固定接点１１ｃを抵抗器１２を介して制御マイクロコンピュータ２０より成る充放電制御部３の一方の入力端子３ａに接続する。   The booster 2 is configured as shown in FIG. 3, for example. One fixed contact 11b of the changeover switch 11 is connected to one input terminal 2a to which the voltage Vin from the radio wave receiving means 1 is supplied via a backflow preventing diode 10 for preventing a reverse flow to the radio wave receiving means 1 side. The other fixed contact 11c of the changeover switch 11 is connected to one input terminal 3a of the charge / discharge control unit 3 including the control microcomputer 20 via the resistor 12.

この切換スイッチ１１の可動接点１１ａを蓄電用のコンデンサ１３を介して切換スイッチ１４の可動接点１４ａに接続する。この切換スイッチ１４の一方の固定接点１４ｂを共通端である他方の入力端子２ｂに接続する。   The movable contact 11a of the changeover switch 11 is connected to the movable contact 14a of the changeover switch 14 via a storage capacitor 13. One fixed contact 14b of the changeover switch 14 is connected to the other input terminal 2b which is a common end.

この切換スイッチ１４の他方の固定接点１４ｃを接続スイッチ１５の可動接点１５ａに接続すると共にこの接続スイッチ１５の可動接点１５ａを蓄電用のコンデンサ１６を介して他方の入力端子２ｂに接続し、この他方の入力端子２ｂを充放電制御部３の他方の入力端子３ｂに接続する。   The other fixed contact 14c of the changeover switch 14 is connected to the movable contact 15a of the connection switch 15, and the movable contact 15a of the connection switch 15 is connected to the other input terminal 2b via the capacitor 16 for storage. Is connected to the other input terminal 3 b of the charge / discharge control unit 3.

この接続スイッチ１５の固定接点１５ｂを抵抗器１７及び２次電池４への逆流を防止する逆流防止用のダイオード１８の直列回路を介して２次電池４よりの正の直流電圧が供給される電源端子１９に接続する。   A power source to which a positive DC voltage from the secondary battery 4 is supplied to the fixed contact 15b of the connection switch 15 via a series circuit of a resistor 17 and a backflow prevention diode 18 that prevents backflow to the secondary battery 4. Connect to terminal 19.

この図３の昇圧部２において、切換スイッチ１１及び１４の夫々の可動接点１１ａ及び１４ａと接続スイッチ１５の可動接点１５ａは充放電制御部３の制御マイクロコンピュータ２０により制御する。   3, the movable contacts 11a and 14a of the changeover switches 11 and 14 and the movable contact 15a of the connection switch 15 are controlled by the control microcomputer 20 of the charge / discharge control unit 3.

この昇圧部２の動作につき説明するに、まず切換スイッチ１１及び１４の夫々の可動接点１１ａ及び１４ａを夫々一方の固定接点１１ｂ及び１４ｂに接続する。このときは、コンデンサ１３が一方の入力端子２ａ及び他方の入力端子２ｂ間に接続されるので、このコンデンサ１３は、電波受信手段１よりの電圧Ｖｉｎにより充電される。この場合、逆流防止用のダイオード１０により電波受信手段１側への逆流が防止される。   In order to describe the operation of the booster 2, first, the movable contacts 11a and 14a of the changeover switches 11 and 14 are connected to one fixed contact 11b and 14b, respectively. At this time, since the capacitor 13 is connected between the one input terminal 2a and the other input terminal 2b, the capacitor 13 is charged by the voltage Vin from the radio wave receiving means 1. In this case, the backflow prevention diode 10 prevents backflow to the radio wave receiving means 1 side.

次に、接続スイッチ１５をオンとし、電源端子１９よりの電圧によりコンデンサ１６を所定の電圧値Ｖｃｃまで充電する。この場合、逆流防止用のダイオード１８により２次電池４側への逆流が防止される。   Next, the connection switch 15 is turned on, and the capacitor 16 is charged to a predetermined voltage value Vcc by the voltage from the power supply terminal 19. In this case, the backflow prevention diode 18 prevents backflow to the secondary battery 4 side.

このコンデンサ１３及び１６の充電が終了した後、接続スイッチ１５をオフとし、その後切換スイッチ１１をオフ状態とし、次に切換スイッチ１４の可動接点１４ａを他方の固定接点１４ｃに接続し、その後切換スイッチ１１の可動接点１１ａを他方の固定接点１１ｃに接続する。   After the charging of the capacitors 13 and 16 is completed, the connection switch 15 is turned off, the changeover switch 11 is turned off, the movable contact 14a of the changeover switch 14 is connected to the other fixed contact 14c, and then the changeover switch. 11 movable contacts 11a are connected to the other fixed contact 11c.

このときは、充放電制御部３の一方の入力端子３ａ及び他方の入力端子３ｂ間にコンデンサ１３及び１６が直列接続されたこととなり、充放電制御部３の一方の入力端子３ａ及び他方の入力端子３ｂ間に２次電池４の充電電圧として、このコンデンサ１３及び１６の加算電圧Ｖｉｎ＋Ｖｃｃが供給される。ここで、抵抗器１２及び１７は過大な充電電流を防止するための電流制限抵抗である。   At this time, the capacitors 13 and 16 are connected in series between the one input terminal 3a and the other input terminal 3b of the charge / discharge control unit 3, and the one input terminal 3a and the other input of the charge / discharge control unit 3 are connected. The added voltage Vin + Vcc of the capacitors 13 and 16 is supplied as the charging voltage of the secondary battery 4 between the terminals 3b. Here, the resistors 12 and 17 are current limiting resistors for preventing an excessive charging current.

この充放電制御部３を例えば図４に示す如く構成する。図４例における本例の２次電池４は、複数個の２次電池セルを並列接続した例えば３個の単位の組電池４ａ、４ｂ、４ｃで構成し、この２次電池４を放電時及び外部充電装置で充電するときは、３個の単位の組電池４ａ、４ｂ及び４ｃを直列接続して使用し、この一方及び他方の入力端子３ａ及び３ｂ間に供給される電圧Ｖｉｎ＋Ｖｃｃによる充電時は、大電力が期待できないので、この単位の組電池４ａ、４ｂ、４ｃ毎に充電するようにする。   The charge / discharge control unit 3 is configured as shown in FIG. The secondary battery 4 of this example in the example of FIG. 4 is configured by, for example, three unit assembled batteries 4a, 4b, and 4c in which a plurality of secondary battery cells are connected in parallel. When charging with an external charging device, three units of assembled batteries 4a, 4b and 4c are used in series, and when charging with voltage Vin + Vcc supplied between one and the other input terminals 3a and 3b, Since large electric power cannot be expected, the assembled batteries 4a, 4b and 4c of this unit are charged.

図４において、一方の入力端子３ａを昇圧部２への逆流を防止する逆流防止用のダイオード２１を介して外部充電装置の充電正極端子に接続又は負荷の正極端子に接続する充放電正極端子５ａに接続する。   In FIG. 4, one input terminal 3a is connected to a charge positive terminal of an external charging device or a positive electrode terminal of a load via a reverse current prevention diode 21 for preventing a reverse flow to the boosting unit 2. Connect to.

また、他方の入力端子３ｂを昇圧部２よりの充電電流を検出する抵抗器２２及び外部充電装置よりの充電電流又は負荷への放電電流を検出する抵抗器２３の直列回路を介して外部充電装置の充電負極端子又は負荷の負極端子に接続する充放電負極端子５ｂに接続する。   Further, the external charging device is connected to the other input terminal 3b via a series circuit of a resistor 22 for detecting a charging current from the boosting unit 2 and a resistor 23 for detecting a charging current from the external charging device or a discharging current to a load. The charge negative electrode terminal 5b connected to the negative electrode terminal of the load or the negative electrode terminal of the load.

このダイオード２１及び充放電正極端子５ａの接続点を電波受信手段１のアンテナ１ａ、１ｂ…１ｎの共振を検知する比較回路を構成する演算増幅回路２４の非反転入力端子＋に接続し、この演算増幅回路２４の反転入力端子−を比較電圧を得るための電池２５を介して他方の入力端子３ｂに接続する。   The connection point of the diode 21 and the charge / discharge positive electrode terminal 5a is connected to the non-inverting input terminal + of the operational amplifier circuit 24 constituting the comparison circuit for detecting the resonance of the antennas 1a, 1b. The inverting input terminal − of the amplifier circuit 24 is connected to the other input terminal 3b through a battery 25 for obtaining a comparison voltage.

本例においては、このダイオード２１と充放電正極端子５ａとの接続点の電圧が電池２５の比較電圧以上となったときに電波受信手段１のアンテナ１ａ、１ｂ…１ｎが無線ＬＡＮで発生している電波の周波数例えば２．４ＧＨｚに共振しているとして、この比較回路を構成する演算増幅回路２４の出力側に得られる検知信号を制御マイクロコンピュータ２０に供給する。   In this example, when the voltage at the connection point between the diode 21 and the charge / discharge positive terminal 5a becomes equal to or higher than the comparison voltage of the battery 25, the antennas 1a, 1b. The control microcomputer 20 is supplied with a detection signal obtained on the output side of the operational amplifier circuit 24 that constitutes the comparison circuit, assuming that it is resonating with the frequency of the radio wave, for example, 2.4 GHz.

また、本例においては、抵抗器２２の両端間に得られる電圧を電流検出回路２６に供給し、この電流検出回路２６にて昇圧部２よりの充電電流を検出し、この電流検出回路２６に得られる昇圧部２よりの充電電流の検出信号を制御マイクロコンピュータ２０に供給する。   In this example, the voltage obtained across the resistor 22 is supplied to the current detection circuit 26, and the current detection circuit 26 detects the charging current from the booster 2. A charge current detection signal from the boosting unit 2 obtained is supplied to the control microcomputer 20.

また、抵抗器２３の両端間に得られる電圧を電流検出回路２７に供給し、この電流検出回路２７にて外部充電装置よりの充電電流又は負荷への放電電流を検出し、この電流検出回路２７に得られる外部充電装置よりの充電電流又は負荷への放電電流の検出信号を制御マイクロコンピュータ２０に供給する。   In addition, the voltage obtained across the resistor 23 is supplied to the current detection circuit 27, and the current detection circuit 27 detects the charging current from the external charging device or the discharge current to the load. The detection signal of the charging current from the external charging device or the discharging current to the load is supplied to the control microcomputer 20.

本例においては、ダイオード２１及び充放電正極端子５ａの接続点を接続スイッチ２８の固定接点２８ｂに接続すると共にこの接続スイッチ２８の可動接点２８ａを切換スイッチ２９の可動接点２９ａに接続する。   In this example, the connection point between the diode 21 and the charge / discharge positive terminal 5 a is connected to the fixed contact 28 b of the connection switch 28 and the movable contact 28 a of the connection switch 28 is connected to the movable contact 29 a of the changeover switch 29.

この切換スイッチ２９の第１の固定接点２９ｂを単位の組電池４ｃの正極端子に接続し、この切換スイッチ２９の第２の固定接点２９ｃを単位の組電池４ｂの正極端子に接続し、この切換スイッチ２９の第３の固定接点２９ｄを単位の組電池４ａの正極端子に接続する。   The first fixed contact 29b of the changeover switch 29 is connected to the positive terminal of the unit assembled battery 4c, and the second fixed contact 29c of the changeover switch 29 is connected to the positive terminal of the unit assembled battery 4b. The third fixed contact 29d of the switch 29 is connected to the positive terminal of the unit assembled battery 4a.

また、抵抗器２２及び２３の接続点を切換スイッチ３０の可動接点３０ａに接続し、この切換スイッチ３０の第１の固定接点３０ｂを単位の組電池４ｃの負極端子に接続し、この切換スイッチ３０の第２の固定接点３０ｃを単位の組電池４ｂの負極端子に接続し、この切換スイッチ３０の第３の固定接点３０ｄを単位の組電池４ａの負極端子に接続する。   Further, the connection point of the resistors 22 and 23 is connected to the movable contact 30a of the changeover switch 30, the first fixed contact 30b of the changeover switch 30 is connected to the negative terminal of the unit assembled battery 4c, and the changeover switch 30 is connected. The second fixed contact 30c is connected to the negative terminal of the unit assembled battery 4b, and the third fixed contact 30d of the changeover switch 30 is connected to the negative terminal of the unit assembled battery 4a.

また、単位の組電池４ｂの負極端子を接続スイッチ３１の可動接点３１ａに接続し、接続スイッチ３１の固定接点３１ｂを単位の組電池４ａの正極端子に接続すると共に単位の組電池４ｃの負極端子を接続スイッチ３２の可動接点３２ａに接続し、接続スイッチ３２の固定接点３２ｂを単位の組電池４ｂの正極端子に接続する。 Further, the negative terminal of the unit assembled battery 4b is connected to the movable contact 31a of the connection switch 31, the fixed contact 31b of the connection switch 31 is connected to the positive terminal of the unit assembled battery 4a, and the negative terminal of the unit assembled battery 4c. Is connected to the movable contact 32a of the connection switch 32, and the fixed contact 32b of the connection switch 32 is connected to the positive terminal of the unit assembled battery 4b .

接続スイッチ２８の可動接点２８ａ及び切換スイッチ２９の可動接点２９ａの接続点と抵抗器２２及び２３の接続点と間に得られる電圧を電圧検出回路３３に供給し、この電圧検出回路３３に得られる電圧検出信号を制御マイクロコンピュータ２０に供給する。   A voltage obtained between the connection point of the movable contact 28 a of the connection switch 28 and the movable contact 29 a of the changeover switch 29 and the connection point of the resistors 22 and 23 is supplied to the voltage detection circuit 33, and this voltage detection circuit 33 is obtained. A voltage detection signal is supplied to the control microcomputer 20.

この場合、本例においては、接続スイッチ２８、３１及び３２の夫々の可動接点２８ａ、３１ａ及び３２ａを制御マイクロコンピュータ２０で制御する如くする。   In this case, in this example, the control microcomputer 20 controls the movable contacts 28a, 31a and 32a of the connection switches 28, 31 and 32, respectively.

即ち、外部充電装置で、この２次電池４を充電するとき又はこの２次電池４から負荷に放電するときには、接続スイッチ３１及び３２をオンとして、３個の単位の組電池４ａ、４ｂ及び４ｃを直列接続すると共に切換スイッチ２９の可動接点２９ａを第１の固定接点２９ｂに接続し、更に接続スイッチ２８をオンとして、２次電池４の正極端子を充放電正極端子５ａに接続する。   That is, when the secondary battery 4 is charged or discharged from the secondary battery 4 to the load by the external charging device, the connection switches 31 and 32 are turned on, and the assembled batteries 4a, 4b and 4c in three units are turned on. Are connected in series, the movable contact 29a of the changeover switch 29 is connected to the first fixed contact 29b, and the connection switch 28 is turned on to connect the positive terminal of the secondary battery 4 to the charge / discharge positive terminal 5a.

また、切換スイッチ３０の可動接点３０ａを第３の固定接点３０ｄに接続し、この２次電池４の負極端子を抵抗器２３を介して充放電負極端子５ｂに接続する。   Further, the movable contact 30 a of the changeover switch 30 is connected to the third fixed contact 30 d, and the negative electrode terminal of the secondary battery 4 is connected to the charge / discharge negative electrode terminal 5 b via the resistor 23.

この場合、３個の単位の組電池４ａ、４ｂ及び４ｃを直列接続された２次電池４の電圧が電圧検出回路３３で検出されると共に外部充電装置よりの充電電流又は負荷への放電電流が電流検出回路２７で検出される。   In this case, the voltage of the secondary battery 4 in which three units of the assembled batteries 4a, 4b and 4c are connected in series is detected by the voltage detection circuit 33, and the charging current from the external charging device or the discharging current to the load is detected. It is detected by the current detection circuit 27.

次に、外部充電装置及び負荷が充放電正極端子５ａ及び充放電負極端子５ｂに接続されていないときに、昇圧部２よりの電圧Ｖｉｎ＋Ｖｃｃで充電するときは、単位の組電池４ａ、４ｂ、４ｃ毎に順次充電するごとくする。このときは、接続スイッチ３１及び３２を夫々オフとし、各単位の組電池４ａ、４ｂ、４ｃを独立とする。また、接続スイッチ２８はオンとする。   Next, when the external charging device and the load are not connected to the charge / discharge positive electrode terminal 5a and the charge / discharge negative electrode terminal 5b, when charging with the voltage Vin + Vcc from the booster 2, the unit assembled batteries 4a, 4b, 4c Make sure to recharge each time. At this time, the connection switches 31 and 32 are turned off, and the assembled batteries 4a, 4b, and 4c of each unit are made independent. The connection switch 28 is turned on.

先ず、単位の組電池４ａを充電するときは、切換スイッチ２９及び３０の夫々の可動接点２９ａ及び３０ａを夫々第３の固定接点２９ｄ及び３０ｄに接続する。このときは、一方の入力端子３ａよりの充電電流がダイオード２１→単位の組電池４ａ→抵抗器２２→他方の入力端子３ｂと流れ、この単位の組電池４ａを充電する。   First, when charging the unit assembled battery 4a, the movable contacts 29a and 30a of the changeover switches 29 and 30 are connected to the third fixed contacts 29d and 30d, respectively. At this time, the charging current from one input terminal 3a flows from the diode 21 → the unit assembled battery 4a → the resistor 22 → the other input terminal 3b to charge the unit assembled battery 4a.

この場合、この単位の組電池４ａの電圧が電圧検出回路３３で検出されると共にこのときの充電電流が電流検出回路２６で検出される。   In this case, the voltage of the assembled battery 4a of this unit is detected by the voltage detection circuit 33, and the charging current at this time is detected by the current detection circuit 26.

次に、単位の組電池４ｂを充電するときは、切換スイッチ２９及び３０の夫々の可動接点２９ａ及び３０ａを夫々第２の固定接点２９ｃ及び３０ｃに接続する。このときは、一方の入力端子３ａよりの充電電流がダイオード２１→単位の組電池４ｂ→抵抗器２２→他方の入力端子３ｂと流れ、この単位の組電池４ｂを充電する。   Next, when charging the unit assembled battery 4b, the movable contacts 29a and 30a of the changeover switches 29 and 30 are connected to the second fixed contacts 29c and 30c, respectively. At this time, the charging current from one input terminal 3a flows from the diode 21 → the unit assembled battery 4b → the resistor 22 → the other input terminal 3b to charge the unit assembled battery 4b.

この場合、この単位の組電池４ｂの電圧が電圧検出回路３３で検出されると共にこのときの充電電流が電流検出回路２６で検出される。   In this case, the voltage of the assembled battery 4b of this unit is detected by the voltage detection circuit 33 and the charging current at this time is detected by the current detection circuit 26.

また、単位の組電池４ｃを充電するときは、切換スイッチ２９及び３０の夫々の可動接点２９ａ及び３０ａを夫々第１の固定接点２９ｂ及び３０ｂに接続する。このときは、一方の入力端子３ａよりの充電電流がダイオード２１→単位の組電池４ｃ→抵抗器２２→他方の入力端子３ｂと流れ、この単位の組電池４ｃを充電する。   When charging the unit assembled battery 4c, the movable contacts 29a and 30a of the changeover switches 29 and 30 are connected to the first fixed contacts 29b and 30b, respectively. At this time, the charging current from one input terminal 3a flows from the diode 21 → the unit assembled battery 4c → the resistor 22 → the other input terminal 3b to charge the unit assembled battery 4c.

この場合、この単位の組電池４ｃの電圧が電圧検出回路３３で検出されると共にこのときの充電電流が電流検出回路２６で検出される。   In this case, the voltage of the assembled battery 4c of this unit is detected by the voltage detection circuit 33, and the charging current at this time is detected by the current detection circuit 26.

本例による携帯型コンピュータは、その他は、従来周知の携帯型コンピュータと同様に構成する。   The rest of the portable computer according to this example is configured in the same manner as a conventionally known portable computer.

本例は、上述の如く構成されているので、本例による携帯型コンピュータを長期間不使用等で、２次電池４の過放電を制御マイクロコンピュータ２０が検出した場合に、上述内部充電装置を動作状態とし、無線ＬＡＮで発生している電磁波を電波受信手段１で受信し、この受信した電磁波のエネルギーを電気エネルギー（電圧）に変換し、この電圧で充放電制御部３により２次電池４を充電するので、この無線ＬＡＮで発生している電波のエネルギーを有効に活用できると共に携帯型コンピュータに内蔵されている２次電池をこの内部の充電装置により充電することによりこの２次電池の劣化を改善することができる。   Since this example is configured as described above, when the control microcomputer 20 detects overdischarge of the secondary battery 4 because the portable computer according to this example has not been used for a long period of time, the internal charging device described above is used. The electromagnetic wave generated in the wireless LAN is received by the radio wave receiving means 1, and the energy of the received electromagnetic wave is converted into electric energy (voltage). The secondary battery 4 is charged by the charge / discharge control unit 3 with this voltage. The secondary battery built in the portable computer can be effectively charged by using the internal charging device and the deterioration of the secondary battery can be effectively utilized. Can be improved.

尚、上述例では、本例による充電装置を携帯型コンピュータに設けた例につき述べたが
本例による充電装置を、その他の携帯型電子機器に設けても良いことは勿論である。 In the above-described example, the example in which the charging device according to the present example is provided in the portable computer has been described. However, it is needless to say that the charging device according to the present example may be provided in other portable electronic devices.

また、本発明は上述例に限ることなく、本発明の要旨を逸脱することなく、その他種々の構成が採り得ることは勿論である。   Further, the present invention is not limited to the above-described example, and various other configurations can be adopted without departing from the gist of the present invention.

本発明充電装置を実施するための最良の形態の例を示すブロック図である。It is a block diagram which shows the example of the best form for implementing this invention charging device. 図１の要部の例を示す構成図である。It is a block diagram which shows the example of the principal part of FIG. 図１の要部の例を示す構成図である。It is a block diagram which shows the example of the principal part of FIG. 図１の要部の例を示す構成図である。It is a block diagram which shows the example of the principal part of FIG.

符号の説明Explanation of symbols

１…電波受信手段、１ａ、１ｂ…１ｎ…アンテナ、２…昇圧部、２ａ、３ａ…一方の入力端子、２ｂ、３ｂ…他方の入力端子、３…充放電制御部、４…２次電池、４ａ、４ｂ、４、４ｃ…単位の組電池、５ａ…充放電正極端子、５ｂ…充放電負極端子、１０、１８、２１…ダイオード、１１、１４、２９、３０…切換スイッチ、１２、１７、２２、２３…抵抗器、１３、１６…コンデンサ、１５、２８、３１、３２…接続スイッチ、１９…電源端子、２０…制御マイクロコンピュータ２６、２７…電流検出回路、３３…電圧検出回路   DESCRIPTION OF SYMBOLS 1 ... Radio wave receiving means, 1a, 1b ... 1n ... Antenna, 2 ... Boosting part, 2a, 3a ... One input terminal, 2b, 3b ... The other input terminal, 3 ... Charging / discharging control part, 4 ... Secondary battery, 4a, 4b, 4, 4c ... unit battery pack, 5a ... charge / discharge positive electrode terminal, 5b ... charge / discharge negative electrode terminal, 10, 18, 21 ... diode, 11, 14, 29, 30 ... changeover switch, 12, 17, DESCRIPTION OF SYMBOLS 22, 23 ... Resistor, 13, 16 ... Capacitor, 15, 28, 31, 32 ... Connection switch, 19 ... Power supply terminal, 20 ... Control microcomputer 26, 27 ... Current detection circuit, 33 ... Voltage detection circuit

Claims (4)

着脱可能に接続された外部充電装置から供給された電気エネルギーを、複数の組電池を含む２次電池に蓄積する充電装置であって、
無線ＬＡＮで発生している電波の周波数に共振して該周波数の電磁波を受信し、受信した前記電磁波のエネルギーを電気エネルギーに変換する電波受信手段と、
前記外部充電装置が接続されていない場合には、前記電波受信手段で変換された電気エネルギーが、前記２次電池に含まれる各組電池ごとに所定の順序で供給されるようにし、前記外部充電装置が接続されている場合には、前記２次電池に含まれる複数の組電池を直列接続させ、直列接続された複数の組電池に前記外部充電装置から電気エネルギーが供給されるようにする充電制御手段と、を備える
充電装置。 A charging device for accumulating electrical energy supplied from an external charging device detachably connected to a secondary battery including a plurality of assembled batteries,
A radio wave receiving means for resonating with a frequency of a radio wave generated in a wireless LAN to receive an electromagnetic wave of the frequency, and converting the received electromagnetic wave energy into electrical energy;
When the external charging device is not connected, the electric energy converted by the radio wave receiving means is supplied in a predetermined order for each assembled battery included in the secondary battery, and the external charging is performed. When a device is connected, charging is performed such that a plurality of assembled batteries included in the secondary battery are connected in series so that electric energy is supplied from the external charging device to the plurality of assembled batteries connected in series. And a charging device. 着脱可能に接続された外部充電装置から供給された電気エネルギーを、複数の組電池を含む２次電池に蓄積する携帯型電子機器であって、
無線ＬＡＮで発生している電波の周波数に共振して該周波数の電磁波を受信し、受信した前記電磁波のエネルギーを電気エネルギーに変換する電波受信手段と、
前記外部充電装置が接続されていない場合には、前記電波受信手段で変換された電気エネルギーが、前記２次電池に含まれる各組電池ごとに所定の順序で供給されるようにし、前記外部充電装置が接続されている場合には、前記２次電池に含まれる複数の組電池を直列接続させ、直列接続された複数の組電池に前記外部充電装置から電気エネルギーが供給されるようにする充電制御手段と、を備える
携帯型電子機器。 A portable electronic device that stores electrical energy supplied from an externally connected removably connected device in a secondary battery including a plurality of assembled batteries ,
A radio wave receiving means for resonating with a frequency of a radio wave generated in a wireless LAN to receive an electromagnetic wave of the frequency, and converting the received electromagnetic wave energy into electrical energy;
When the external charging device is not connected, the electric energy converted by the radio wave receiving means is supplied in a predetermined order for each assembled battery included in the secondary battery, and the external charging is performed. When a device is connected, charging is performed such that a plurality of assembled batteries included in the secondary battery are connected in series so that electric energy is supplied from the external charging device to the plurality of assembled batteries connected in series. A portable electronic device comprising a control means. 請求項１記載の充電装置において、
前記電波受信手段の出力に昇圧部が接続された
充電装置。 The charging device according to claim 1,
Booster is connected to an output of said radio wave reception means
Charging apparatus. 請求項３記載の充電装置において、
前記昇圧部の出力に前記電波受信手段の受信電波の周波数共振を検知する周波数共振検知手段が接続された
充電装置。 The charging device according to claim 3 , wherein
Frequency resonance detection means for detecting the frequency resonance of the received radio wave of the radio wave receiving means to the output of the booster is connected
Charging apparatus.
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