JP2008187796A - Electronic equipment and charge control method therefor - Google Patents

Electronic equipment and charge control method therefor Download PDF

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JP2008187796A
JP2008187796A JP2007017756A JP2007017756A JP2008187796A JP 2008187796 A JP2008187796 A JP 2008187796A JP 2007017756 A JP2007017756 A JP 2007017756A JP 2007017756 A JP2007017756 A JP 2007017756A JP 2008187796 A JP2008187796 A JP 2008187796A
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charging
adapter
monitoring
charge
current
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Takeshi Ishida
武史 石田
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Nec Saitama Ltd
埼玉日本電気株式会社
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage
    • Y02E60/12Battery technologies with an indirect contribution to GHG emissions mitigation

Abstract

PROBLEM TO BE SOLVED: To provide electronic equipment and a charge control method therefor wherein temperature rise is suppressed when a non-genuine charging adapter is used.
SOLUTION: Even when the electronic equipment is connected to a non-genuine charging adapter, it is charged by an appropriate charging method by a monitoring means and a controlling means. Therefore, temperature rise can be suppressed when a non-genuine charging adapter is used.
COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、二次電池を内蔵した電子機器及びその充電制御方法に関する。 The present invention relates to an electronic device and a charging control method thereof with a built-in rechargeable battery.

一般に、内部に充電可能な二次電池を備え、外部の充電アダプタにて、二次電池に充電を行う電子機器において、充電アダプタが備えた定電流回路を利用した充電方法があるが、近年では電子機器内部に備えた定電流回路を利用した充電方法(例えば、特許文献1、2参照。)が開発されている。 In general, a secondary battery that can charge the inside, by an external charger adapter, an electronic apparatus to charge the secondary battery, there is a charging method using the constant current circuit is charged adapter comprising, in recent years, charging method using the constant current circuit provided inside the electronic device (e.g., see Patent documents 1 and 2.) have been developed.
特開2004−173408号公報 JP 2004-173408 JP 特開平11−069647号公報 JP 11-069647 discloses

しかしながら、充電アダプタに備えられた定電流回路を利用する充電方式では、出力電圧が垂下特性を有している事を期待した充電回路である為、充電アダプタ内部に定電流回路を備えない充電電流の供給能力の高い充電アダプタが接続された場合、供給電圧とバッテリ電圧との間の電位差が、垂下特性を有する充電アダプタと比較して大きくなる為、電子機器内部で発生する熱損失量が大きくなってしまう問題があった。 However, in the charging method using a constant current circuit provided in the charging adapter, since the output voltage is a charging circuit expected that have a drooping characteristic, without the constant current circuit inside the charging adapter charging current If a high charging adapter of supply capacity of being connected, the potential difference between the supply voltage and the battery voltage, to become larger than the charging adapter having a drooping characteristic, heat loss generated inside the electronic apparatus is large It was made to cause problems.

また、充電アダプタが備える定電流回路を利用した充電方法では、故障のおそれを考慮すると、規格外の充電アダプタが電子機器に接続されたときの対応が必要であった。 Further, in the charging method using the constant current circuit included in the charging adapter, considering the risk of failure, correspondence was required when the nonstandard charging adapter is connected to the electronic device.
これは、一般に純正の充電アダプタは高価であり、汎用の充電アダプタや規格外の充電アダプタを用いて電子機器の充電を行うユーザが多いためである。 This generally genuine charger adapter is expensive, because there are many user to charge the electronic devices using a general-purpose charging adapter or substandard charger adapter.

また、上述した特許文献1に記載の発明は純正の充電アダプタにて電子機器の充電を行う場合を想定しており、特許文献2に記載の発明は充電効率の向上を図ることを目的としており電子機器の温度上昇による不具合については考慮されていない。 Further, the invention described in Patent Document 1 described above assumes a case where the charging of the electronic device at genuine charging adapter, the invention described in Patent Document 2 is intended to improve the charging efficiency no consideration is given to the problems caused by the temperature rise of the electronic devices.

そこで、本発明の目的は、純正でない充電アダプタを用いた場合の温度上昇を抑えた電子機器及びその充電制御方法を提供することにある。 An object of the present invention is to provide an electronic device and a charging control method thereof reduce the temperature rise in the case of using the non-genuine charger adapter.

上記課題を解決するため、請求項1に記載の発明は、外部の充電アダプタを用いて内蔵した二次電池の充電を行う電子機器において、前記二次電池への入力電圧を監視する監視手段と、前記二次電池に接続される充電アダプタに応じて充電方法を切り替える制御手段とを備えたことを特徴とする。 To solve the above problems, the invention according to claim 1, in an electronic device to charge the secondary battery with a built using an external charger adapter, a monitoring means for monitoring the input voltage to the secondary battery , characterized in that a control means for switching the charging method according to the charging adapter connected to the secondary battery.

請求項1に記載の発明によれば、二次電池への入力電圧を監視する監視手段と、二次電池に接続される充電アダプタに応じて充電方法を切り替える制御手段とを備えたことにより、純正でない充電アダプタに接続されても適切な充電方法で充電されるので、純正でない充電アダプタを用いた場合の温度上昇を抑えることができる。 According to the invention described in claim 1, by providing a monitoring means for monitoring the input voltage to the secondary battery, and control means for switching the charging method according to the charging adapter is connected to the secondary battery, because it is charged with the connected also suitable charging method to a non-genuine charger adapter, it is possible to suppress the temperature rise in the case of using the non-genuine charger adapter.

請求項2に記載の発明は、請求項1に記載の発明において、前記制御手段は、前記充電アダプタの供給能力が所定の値より高い場合には充電動作を停止することを特徴とする。 The invention of claim 2 is the invention according to claim 1, wherein the control means, supply capacity of the charging adapter if higher than a predetermined value, characterized in that stops the charging operation.

請求項1に記載の発明によれば、充電アダプタの供給能力が所定の値より高い場合には充電動作を停止することにより、二次電池には外部からエネルギーが供給されないので、純正でない充電アダプタを用いた場合の温度上昇を抑えることができる。 According to the invention described in claim 1, by stopping the charging operation if the supply capacity of the charger adapter is higher than the predetermined value, the external energy is not supplied to the secondary battery, not genuine charger adapter it is possible to suppress the temperature rise in the case of using the.

請求項3に記載の発明は、請求項1に記載の発明において、前記制御手段は、前記充電アダプタの供給能力が所定の値より高い場合には一定の周期で間欠充電を行うことを特徴とする。 The invention according to claim 3, in the invention described in claim 1, wherein, when the supply capacity of the charger adapter is higher than the predetermined value, and characterized by performing an intermittent charge at a fixed period to.

請求項3に記載の発明によれば、充電アダプタの供給能力が所定の値より高い場合には一定の周期で間欠充電を行うことにより、充電停止期間において自然冷却がなされるので、純正でない充電アダプタを用いた場合の温度上昇を抑えることができる。 According to the invention described in claim 3, by the supply capacity of the charger adapter performs intermittent charging at a constant period is higher than a predetermined value, the natural cooling is performed in the charging suspension period is not genuine charge it is possible to suppress the temperature rise in the case of using an adapter.

請求項4に記載の発明は、請求項3に記載の発明において、前記間欠充電の周期は充電時間をn分とし、充電停止時間をm分とし、所定の回数行うことを特徴とする。 The invention of claim 4 is the invention according to claim 3, the period of the intermittent charge to minutes n a charging time, to minutes m charging stop time, and performs a predetermined number of times.

請求項4に記載の発明によれば、間欠充電の周期は充電時間をn分とし、充電停止時間をm分とし、所定の回数行うことにより充電停止期間において自然冷却がなされるので、純正でない充電アダプタを用いた場合の温度上昇を抑えることができる。 According to the invention described in claim 4, to the period of the intermittent charge minutes n a charging time, to minutes m charging stop time, since natural cooling is performed in the charge stop period by performing a predetermined number of times, not genuine it is possible to suppress the temperature rise in the case of using the charging adapter.
ここで、例えばnは1であり、mは3である。 Here, for example, n is 1, m is 3. また、所定の回数とは例えば、9回が挙げられる。 The predetermined number of times for example, 9 times. 但し、n、m、及び所定の回数は電子機器に用いられる二次電池の種類や定格に応じて変更することができる。 However, n, m, and the predetermined number of times may be changed depending on the type and rating of rechargeable batteries used in electronic equipment. 変更とは例えば、電子機器に内蔵された不揮発テーブルの数値を変更することが挙げられる。 By altering is for example, possible to change the number of non-table that is incorporated in the electronic equipment.

請求項5に記載の発明は、請求項1に記載の発明において、前記監視手段は、一定の時間毎に前記入力電圧を監視し、1回の測定時に所定の回数連続して測定し、その平均値を測定値とすることを特徴とする。 Invention according to claim 5, in the invention described in claim 1, wherein the monitoring means said input voltage is monitored every certain time, continuously measuring a predetermined number of times during one measurement, the characterized in that the measured values ​​a mean value.

請求項5に記載の発明によれば、一定の時間毎に前記入力電圧を監視し、1回の測定時に所定の回数連続して測定し、その平均値を測定値とすることにより、より適切に充電の制御を行うことができるので、純正でない充電アダプタを用いた場合の温度上昇を抑えることができる。 According to the invention of claim 5, the input voltage monitoring every predetermined time, one of continuously measuring a predetermined number of times during the measurement, by the measurement of the average value, more appropriate since it is possible to control the charging, it is possible to suppress the temperature rise in the case of using the non-genuine charger adapter.

請求項6に記載の発明は、請求項1に記載の発明において、前記監視手段は、一定の時間毎に前記入力電圧を監視し、前記入力電圧が2回連続で所定の値を超えた場合前記充電アダプタは定電流回路を持たない充電電流供給能力の高い充電アダプタであると判断することを特徴とする。 If an invention according to claim 6, in the invention described in claim 1, wherein the monitoring means, for the input voltage monitoring every predetermined time, the input voltage exceeds a predetermined value at two consecutive the charging adapter is characterized by determining that the high charging current supply capability without a constant current circuit charging adapter.

請求項6に記載の発明によれば、一定の時間毎に入力電圧を監視し、入力電圧が2回連続で所定の値を超えた場合充電アダプタは定電流回路を持たない充電電流供給能力の高い充電アダプタであると判断することにより、充電電流供給能力の高い充電アダプタに対応した充電制御を行うので、純正でない充電アダプタを用いた場合の温度上昇を抑えることができる。 According to the invention of claim 6, it monitors the input voltage every predetermined time, when the input voltage exceeds a predetermined value in two successive charging adapter of the charging current supply capability without a constant current circuit by determining that a high charging adapter, since the charge control corresponding to the high charging current supply capability charging adapter, it is possible to suppress the temperature rise in the case of using the non-genuine charger adapter.

請求項7に記載の発明は、請求項6に記載の発明において、前記制御手段は、前記充電アダプタが定電流回路を持たない充電電流供給能力の高い充電アダプタであると判断し間欠充電制御に移行した際連続した間欠充電制御が設定された時間より長くなった時点で強制的に充電を停止させることを特徴とする。 The invention of claim 7 is the invention of claim 6, wherein, the determination intermittently charging control with the charging adapter is high charging adapter of the charging current supply capability without a constant current circuit wherein the forcibly stopping the charging at the time of transition successive intermittent charge control upon is longer than the time set.

請求項7に記載の発明によれば、充電アダプタが定電流回路を持たない充電電流供給能力の高い充電アダプタであると判断し間欠充電制御に移行した際連続した間欠充電制御が設定された時間より長くなった時点で強制的に充電を停止させることにより、二次電池にはエネルギーが供給されないので、純正でない充電アダプタを用いた場合の温度上昇を抑えることができる。 According to the invention described in claim 7, time is continuous intermittent charging control when the charging adapter continues to decision intermittently charge control to be high charging adapter of the charging current supply capability without a constant current circuit is set by stopping the forced charging when it becomes longer, the secondary battery the energy is not supplied, it is possible to suppress the temperature rise in the case of using the non-genuine charger adapter.

請求項8に記載の発明は、請求項1に記載の発明において、前記制御手段は、充電電流を監視する充電電流監視回路にて検出した充電電流値の読み出しが充電制御ICに対して可能であり、前記入力電圧を監視する外部電圧監視回路と前記二次電池の電圧を監視するバッテリ電圧監視回路で検出した電位差と、前記充電電流監視回路にて検出した充電電流値による熱損失量を算出し、熱損失量が閾値を超えた場合、前記充電アダプタが定電流回路を持たない充電電流供給能力の高い充電アダプタであると判断することを特徴とする。 The invention of claim 8 is the invention according to claim 1, wherein the control unit, a read of the charging current value detected by the charging current monitoring circuit for monitoring the charging current is possible for the charge control IC There, calculates the potential difference detected by the battery voltage monitoring circuit for monitoring an external voltage monitoring circuit voltage of the secondary battery, the heat loss due to the charging current value detected by the charging current monitoring circuit for monitoring the input voltage and, if the heat loss amount exceeds the threshold value, and determines that the charging adapter is high charging adapter of the charging current supply capability without a constant current circuit.

請求項8に記載の発明によれば、入力電圧を監視する外部電圧監視回路と二次電池の電圧を監視するバッテリ電圧監視回路で検出した電位差と、充電電流監視回路にて検出した充電電流値による熱損失量を算出し、熱損失量が閾値を超えた場合、充電アダプタが定電流回路を持たない充電電流供給能力の高い充電アダプタであると判断することにより、必要以上のエネルギーが二次電池に供給されないので、純正でない充電アダプタを用いた場合の温度上昇を抑えることができる。 According to the invention of claim 8, the potential difference detected by the battery voltage monitoring circuit for monitoring the voltage of the external voltage monitoring circuit and the secondary battery to monitor the input voltage, the charging current value detected by the charging current monitoring circuit by calculating the thermal loss, if the heat loss amount exceeds the threshold value, by determining the charging adapter is high charging adapter of the charging current supply capability without a constant current circuit, excessive energy secondary since not supplied to the battery, it is possible to suppress the temperature rise in the case of using the non-genuine charger adapter.

請求項9に記載の発明は、外部の充電アダプタを用いて内蔵した二次電池の充電を行う電子機器の充電制御方法において、前記二次電池への入力電圧を監視し、前記二次電池に接続される充電アダプタに応じて充電方法を切り替えることを特徴とする。 The invention according to claim 9, in the charging control method of an electronic device to charge the secondary battery with a built using an external charger adapter monitors the input voltage to the secondary battery, the secondary battery and switches the charging method according to the connected the charger adapter.

請求項9に記載の発明によれば、純正でない充電アダプタに接続されても適切な充電方法で充電されるので、純正でない充電アダプタを用いた場合の温度上昇を抑えることができる。 According to the invention described in claim 9, since it is charged in an appropriate charging method is also connected to the non-genuine charger adapter, it is possible to suppress the temperature rise in the case of using the non-genuine charger adapter.

本発明によれば、純正でない充電アダプタに接続されても監視手段及び制御手段により適切な充電方法で充電されるので、純正でない充電アダプタを用いた場合の温度上昇を抑えることができる。 According to the present invention, since connected to the non-genuine charger adapter is charged with appropriate charging method by monitoring means and control means, it is possible to suppress the temperature rise in the case of using the non-genuine charger adapter.

本発明に係る電子機器は、内部に充電可能な二次電池を備え、外部の充電アダプタにより、二次電池に充電を行う電子機器において、入力電圧を定期的に監視して、接続される充電アダプタに応じて、充電方法を切り替える事を特徴とするものである。 Electronic device according to the present invention comprises a chargeable secondary battery therein, by an external charger adapter, charging the electronic device to charge the secondary battery, the input voltage periodically monitors, which are connected depending on the adapter, and it is characterized in that for switching the charging method.
すなわち、本発明は、定電流回路を備えない充電電流の供給能力の高い充電アダプタが接続された場合、これを検出し、強制的に充電を停止、又は一定の周期で充電を行う間欠充電に切り替える事により、電子機器内部で発生する熱損失量を低減させることを特徴とする。 That is, the present invention, when the high charging adapter of supply capacity of the charge current without the constant current circuit is connected, detects this and forces the charging stop, or intermittent charge for charging at a constant period by switching, and wherein the reducing heat loss generated inside the electronic apparatus.

本発明の実施の形態について説明する。 Of embodiments of the present invention.
〔実施の形態1〕 [Embodiment 1]
本実施の形態については携帯電話を例にとり、図面を参照して説明する。 The present embodiment takes a mobile telephone as an example will be described with reference to the drawings.
図1は、本発明に係る電子機器の制御方法を適用した電子機器としての携帯電話の電源関係についてのブロック図である。 Figure 1 is a block diagram of the power supply relationship cellular phone as an electronic apparatus to which the control method of an electronic apparatus according to the present invention. 説明を簡単にするため、同図においては、無線高周波部、ベースバンド部、メモリ(不揮発テーブル含む)、スピーカ、マイクロフォン、キー、画像処理部、カメラ、CCD等は省略されている。 For simplicity, in the figure, the radio frequency unit, a baseband unit, a memory (including nonvolatile table), a speaker, a microphone, a key, an image processing unit, a camera, CCD or the like are omitted.

先ずは、一般的な携帯電話における、充電アダプタ(111)の定電流回路を利用した充電制御について説明する。 First, in a typical mobile phone, charging control for using the constant current circuit of the charging adapter (111) is described.
定電流回路を備える充電アダプタ(111)による充電では、充電アダプタ(111)の出力電圧は垂下特性を持ち、充電制御FET(104)の入力端と出力端との間は開放状態となる為、図1のA点の電圧とB点との電位差は最小値となる。 The charging by the charging adapter comprising a constant current circuit (111), the output voltage of the charger adapter (111) has a drooping characteristic, between the input terminal and the output terminal of the charge control FET (104) is to become an open state, the potential difference between the voltage and the point B of the point a in FIG. 1 is a minimum value.
これは、定電流充電中の動作であるが、満充電近くなると定電圧充電に切り替わる。 This is the operation of the constant current charging is switched to the constant voltage charging to become fully charged close. 定電圧充電中は、充電制御FET(104)にて充電電流を制御する為、A点の電圧は、充電アダプタ(111)の無負荷時の電圧とほぼ同等の約5.5V〜6Vの電圧となる。 During constant-voltage charge is to control the charging current by the charging control FET (104), the voltage at point A, no-load voltage substantially equal to about 5.5V~6V voltage charger adapter (111) to become.

バッテリ(101)の満充電時の電圧が約4.2V〜4.3Vであるとすると、A点とB点との電位差は1.2V〜1.8V程度となる。 When full voltage during charging of the battery (101) is assumed to be approximately 4.2V~4.3V, the potential difference between points A and B is approximately 1.2V to 1.8V.

ここで、本発明に係る携帯電話(100)では、制御手段としてのCPU(106)の制御により、充電時に監視手段としての外部電圧監視回路(110)とバッテリ電圧監視回路(107)により、A点とB点との電圧をそれぞれ監視し、CPU(106)によりA点−B点の電位差を算出し、表1の閾値と比較する。 Here, the mobile phone (100) according to the present invention, the control of the CPU (106) as a control unit, and the battery voltage monitoring circuit (107) external voltage monitoring circuit (110) as a monitoring means during charging, A the voltage between the point and the point B respectively monitors, calculates the potential difference between point a -B point by CPU (106), it is compared with a threshold value in Table 1.
表1は、定電流回路を内蔵しない供給能力の高いアダプタを検出するための閾値を設定するためのデータであり、図1のA点とB点との電位差であり、これらのデータは携帯電話(100)の図示しない不揮発テーブルに格納されている。 Table 1 is data for setting a threshold value for detecting a high adapter of supply capacity without integral constant current circuit, the potential difference between point A and point B in FIG. 1, these data the mobile phone stored in the nonvolatile table (not shown) of the (100).

携帯電話(100)の充電が定電流充電中は、表1の閾値より、0.5V以下である事を確認し、定電圧充電中は2.0V以下である事を確認する。 Charging constant current charging of the mobile phone (100), the threshold of Table 1, to confirm that they are at 0.5V or less, it confirms that in the constant voltage charging is less 2.0 V.
もし、閾値を越える電圧が検出された場合、CPU(106)は充電制御IC(105)を制御し、強制的に充電を停止させるようになっている。 If a voltage exceeding the threshold is detected, CPU (106) is adapted to control the charge control IC (105), to stop the forced charging.

〔構成〕 〔Constitution〕
図1は、本発明に係る電子機器としての携帯電話(100)で、充電アダプタを接続する外部I/Oコネクタ(102)、充電電流検出用抵抗(103)、充電電流を制御する充電制御FET(104)、充電制御全般をつかさどる、充電制御IC(105)と、外部給電アダプタ(111)の充電電流の供給能力を検出し、供給能力が高い事を検出した時、充電の強制停止、又は間欠充電制御に切り替える等の判断を行うCPU(106)で構成される。 Figure 1 is a cellular phone (100) as an electronic apparatus according to the present invention, the external I / O connector for connecting the charging adapter (102), the charging current detecting resistor (103), the charge control FET to control the charging current (104), responsible for charging control in general, a charge control IC (105), detects the supply capacity of the charging current of the external power supply adapter (111), when detecting that a high supply capacity, forced stop of charging, or composed of CPU (106) for performing determination of such switched to the intermittent charge control.

又、充電制御IC(105)内部には、バッテリ(101)の電圧をモニタするバッテリ電圧開始回路(107)と、充電制御FET(104)を制御する充電制御回路(108)と、充電電流検出抵抗(103)による電圧降下を監視し、充電電流を監視する充電電流監視回路(109)と、充電アダプタ(111)側の電圧をモニタする外部電圧監視回路(110)とが設けられている。 Also, inside the charge control IC (105), a battery (101) the battery voltage starts circuit (107) for monitoring the voltage of the charge control circuit for controlling the charge control FET (104) and (108), the charging current detection resistance voltage drop due to (103) monitors the charging current monitoring circuit for monitoring the charge current (109), an external voltage monitoring circuit for monitoring the voltage of the charger adapter (111) side and (110) are provided.

すなわち、図1に示す携帯電話(100)の外部I/Oコネクタ(102)の入力端(図の左端)には充電アダプタ(111)が接続されている。 That is, the charging adapter (111) is connected to the input end of the external I / O connector (102) of the cellular phone (100) shown in FIG. 1 (the left end in the figure). 外部I/Oコネクタ(102)の出力端(この場合右端)は抵抗(103)の一端(この場合左端)及び充電制御IC(105)の外部電圧監視回路(110)が接続されている。 The output terminal of the external I / O connector (102) (in this case the right end) of the external voltage monitoring circuit (110) is connected to one end of a resistor (103) (in this case the left end) and charge control IC (105). これら外部I/Oコネクタ(102)、抵抗(103)、及び外部電圧監視回路(110)の接続点をA点とする。 These external I / O connector (102), the resistor (103), and a connection point of the external voltage monitoring circuit (110) and point A.

抵抗103の他端(この場合右端)は充電制御FET(電界効果トランジスタ:104)の入力端(左端:ドレイン)、及び充電制御IC(105)の充電電流監視回路(109)に接続されている。 The other end (in this case the right end) of the charge control FET (field effect transistor: 104) of the resistor 103 inputs (left: drain), and is connected to the charging current monitoring circuit of the charge control IC (105) (109) . これら抵抗(103)、充電制御FET(104)、及び充電電流監視回路109の接続点をC点とする。 These resistors (103), the charge control FET (104), and a connection point of the charging current monitoring circuit 109 and C point.

充電制御FET104の出力端(この場合右端:ソース)はバッテリ(101)及び充電制御IC(107)のバッテリ電圧開始回路(107)に接続されている。 The output terminal of the charge control FET 104 (in this case the right edge: the source) is connected to the battery voltage start circuit of the battery (101) and charge control IC (107) (107). これら充電制御FET(104)、バッテリ(101)、及びバッテリ電圧監視回路(107)の接続点をB点とする。 These charge control FET (104), a battery (101), and a connection point of the battery voltage monitoring circuit (107) and B points.
充電制御IC(105)は、CPU(106)に接続され、CPU(106)によって制御される。 Charge control IC (105) is connected to the CPU (106), it is controlled by the CPU (106).
バッテリ(101)としては、例えば、リチウムイオン電池(公称容量830mAh、定格電圧3.8V) Battery The (101), for example, lithium ion battery (nominal capacity 830mAh, rated voltage 3.8 V)

表2は、本発明に係る電子機器としての携帯電話の間欠充電実施中の充電ON時間とOFF時間とを設定するためのデータであり、これらのデータは図示しない不揮発テーブルに格納されている。 Table 2 is a data for setting the charging ON time in the intermittent Charging mobile phone as an electronic apparatus according to the present invention and the OFF time, these data are stored in the nonvolatile table (not shown).

表3は、本発明に係る電子機器としての携帯電話の間欠充電時間タイマーを設定するためのデータであり、これらのデータは図示しない不揮発テーブルに格納されている。 Table 3 is data for setting the intermittent charging time timer of the mobile phone as an electronic apparatus according to the present invention, these data are stored in the nonvolatile table (not shown).

図2(a)は、図1に示した携帯電話のバッテリ電圧監視タイミング図であり、図2(b)は、図1に示した携帯電話の外部電圧監視タイミング図であり、図2(c)は、図2(a)のタイミング図と図2(b)のタイミング図とを重ね合わせたタイミング図である。 Figure 2 (a) is a battery voltage monitoring timing diagram of the mobile phone shown in FIG. 1, FIG. 2 (b) is an external voltage monitoring timing diagram of the mobile phone shown in FIG. 1, FIG. 2 (c ) is a timing diagram and a timing diagram superposing the timing diagram shown in FIG. 2 (b) of FIG. 2 (a). 図2(a)〜(c)において横軸は時間軸であるが、図2(a)、(b)は単位が秒であり、図2(c)は単位が分である。 While the horizontal axis in FIG. 2 (a) ~ (c) is a time axis, FIG. 2 (a), (b) is a unit of seconds, FIG. 2 (c) is a unit of minute.

〔効果の説明〕 Description of Effect]
以上において、本来の設計から外れた充電アダプタ、又は充電アダプタ内部に定電流回路を備えない充電電流の供給能力の高いアダプタにて、充電が開始された場合でも、これを検出し、充電動作を強制停止する事、又は一定の周期で間欠充電を行う事により、電子機器内部で発生する熱損失量の低減を可能とし、電子機器の温度上昇を抑制する事が可能となる。 In the above, the charging adapter deviates from the original design, or at high supply capacity of the charging current to the internal charger adapter does not include a constant current circuit adapter, even if the charging is started, detects this, the charging operation it is suspended, or by performing intermittent charges in a certain cycle, to allow the reduction of the heat loss generated inside the electronic apparatus, it is possible to suppress an increase in the temperature of the electronic device.

なお、上述した実施の形態は、本発明の好適な実施の形態の一例を示すものであり、本発明はそれに限定されることなく、その要旨を逸脱しない範囲内において、種々変形実施が可能である。 Incidentally, the above-described embodiment, showing an example of a preferred embodiment of the present invention, the present invention is not limited thereto, without departing from the scope and spirit thereof, various modifications can be carried out is there. 例えば、上述の説明では、携帯電話の場合で説明したが、本発明はこれに限定されず、ノートパソコン、ビデオカメラ、デジタルカメラ、ラジコン(登録商標)の玩具等の二次電池を内蔵した電子機器の電源にも適用可能である。 For example, electronic in the above description has been described in the case of a cellular phone, to which the present invention is not limited thereto, laptop with built-in video camera, the secondary battery toys of the digital camera, radio control (R) also to the power of the equipment it can be applied. また、上述した実施の形態ではFETを用いた場合説明したが、本発明ではこれに限定されず、バイポーラトランジスタにも適用可能である。 Although described the case of using the FET in the above-described embodiment is not limited thereto in the present invention is applicable to a bipolar transistor.

次に本発明に係る電子機器の制御方法を適用した電子機器の他の実施の形態について説明する。 Next, another embodiment of the electronic apparatus to which the control method of an electronic apparatus according to the present invention will be described.
〔実施の形態2〕 [Embodiment 2]
図1、表1、表2を用いて他の実施の形態を説明する。 Figure 1, Table 1, illustrating the other embodiments with reference to Table 2.
充電中に図1のA点とB点との電位差が、表1で示す閾値を超えた場合、一定周期で充電を繰り返す間欠充電を行う。 The potential difference between points A and B of FIG. 1 during charging, if the threshold is exceeded shown in Table 1, the intermittent charging repeated charging at a constant period.
ここで、間欠充電の周期は、表2で示すように、例えば充電時間としてのn分を1分とし、充電停止時間としてのm分を3分とし、充電/停止の繰り返し回数としての所定の回数を9回すると、本来の充電と比較して、充電による温度上昇は凡そ4分の1に抑えることが可能となる(図3、4参照)。 Here, the cycle of the intermittent charging, as shown in Table 2, for example, to 1 minute to n minutes as the charging time to 3 minutes to m minutes as charging stop time, given as a number of repetitions of charge / Stop When number of times to 9 times, as compared to the original charge, the temperature rise due to charging can be suppressed to 1 of approximately 4 minutes (see Fig. 3 and 4). 但し、n、m、及び所定の回数は電子機器に用いられる二次電池の種類や定格に応じて変更することができる。 However, n, m, and the predetermined number of times may be changed depending on the type and rating of rechargeable batteries used in electronic equipment. 変更とは例えば、電子機器に内蔵された不揮発テーブルの数値を変更することが挙げられる。 By altering is for example, possible to change the number of non-table that is incorporated in the electronic equipment.

尚、図3は、図1に示した携帯電話において間欠充電を行った場合の充電電流と温度変化との関係を示す図である。 Incidentally, FIG. 3 is a diagram showing the relationship between the charging current and the temperature change in the case of performing the intermittent charge in the mobile phone shown in FIG. 図4は、図1に示した携帯電話において間欠充電を行わなかった場合の充電電流と温度変化との関係を示す図である。 Figure 4 is a diagram showing the relationship between the charging current and the temperature change when not performed intermittent charging the mobile phone shown in FIG. 図3、4において横軸が時間軸、左縦軸が温度軸を示し、右縦軸が電流軸を示す。 The horizontal axis is the time axis in FIG. 3 and 4, shows the left vertical axis represents the temperature axis, the right vertical axis represents current axis.
また、充電アダプタ条件としては、例えば、電圧を+6Vとし、電流リミットを1A(安定化電源を使用)とし、テレビ電話を使用するものとした(15dBm)。 As the charging adapter conditions, for example, a voltage + and 6V, the current limit and 1A (using the stabilized power supply), and shall use the videophone (15 dBm).

〔実施の形態3〕 [Embodiment 3]
図1、表1、図2(a)〜(c)を用いて、電圧監視タイミングについて説明する。 Figure 1, Table 1, with reference to FIG. 2 (a) ~ (c), will be described voltage monitoring timing.
外部電圧監視回路(109)及びバッテリ電圧監視回路(107)でそれぞれの電圧を検出する際、図2(a)〜(c)に示すように、例えば1分毎に電圧監視を行い、1回の測定時に1秒毎に4回連続して測定し、その平均値を測定値とする事により、周囲ノイズ等による誤動作の影響を低減する事が可能となる。 When detecting the respective voltages at the external voltage monitoring circuit (109) and the battery voltage monitoring circuit (107), as shown in FIG. 2 (a) ~ (c), for example, current and voltage monitoring every minute, once the continuously measured four times every second during the measurement, by the measurement value and the average value, it is possible to reduce the influence of malfunction caused by the ambient noise.

〔実施の形態4〕 [Embodiment 4]
4分毎又は、1分毎に実施する1回の測定で判定するのではなく、2回連続で表1に示す閾値を超えた場合、定電流回路を備えない充電電流の供給能力の高い充電アダプタ接続と判定する。 4 minutes each or, instead of determining in one measurement to be carried out every 1 minute, if the threshold is exceeded as shown in Table 1 in two consecutive high supply capacity of the charge current without the constant-current circuit charging It determines that the adapter connection.
この場合においても純正でない充電アダプタを用いた場合の温度上昇を抑えることができる。 It is possible to suppress the temperature rise in the case of using the charging adapter is not genuine in this case.

〔実施の形態5〕 Fifth Embodiment
図1、表3を用いて、間欠充電タイマーについて説明する。 1, with reference to Table 3, will be described the intermittent charge timer.
携帯電話(100)は、CPU(106)が充電アダプタに定電流回路を備えない充電電流の供給能力の高いアダプタ接続と判定し、間欠充電制御に移行させた際、連続した間欠充電制御が、表3に示した不揮発テーブルデータで設定した時間より長くなった時点で、CPU(106)は充電制御IC(105)を制御し、強制的に充電を停止させる。 Mobile phone (100), CPU (106) is determined to be high adapter connection of supply capacity of the charge current without the constant-current circuit to the charging adapter, when to shift to the intermittent charge control, intermittent charging control continuous, when it becomes longer than the time set by the non-table data shown in table 3, CPU (106) controls the charge control IC (105), to stop the forced charging. この事により、長時間バッテリ(101)へ充電を行い続けるという状態を回避させ、より信頼性を高める事が可能となる。 By this, a long period of time to avoid a situation that continues to make a charge to the battery (101), it is possible to further enhance the reliability.

〔実施の形態6〕 [Embodiment 6]
CPU(106)は、充電電流監視回路(108)にて検出した充電電流値の読み出しが、充電制御IC(105)に対して可能であり、外部電圧監視回路(110)とバッテリ電圧監視回路(107)で検出した電位差と、充電電流監視回路(108)にて検出した充電電流値による、熱損失量を算出し、熱損失量が閾値を超えた場合、定電流回路を備えない充電電流の供給能力の高いアダプタ接続であると判定する。 CPU (106) reads the charging current value detected by the charging current monitoring circuit (108) are possible with respect to the charge control IC (105), an external voltage monitoring circuit (110) and the battery voltage monitoring circuit ( a potential difference which is detected 107), by the charging current value detected by the charging current monitoring circuit (108) calculates the heat loss, when the heat loss amount exceeds the threshold value, the charging current having no constant current circuit determines that high adapter connection of supply capacity. この場合においても純正でない充電アダプタを用いた場合の温度上昇を抑えることができる。 It is possible to suppress the temperature rise in the case of using the charging adapter is not genuine in this case.

本発明は、携帯電話、ノートパソコン、ビデオカメラ、デジタルカメラ、ラジコン(登録商標)の玩具等の二次電池を内蔵した電子機器の電源に利用することができる。 The present invention, it is possible to use a mobile phone, notebook computer, video camera, digital camera, wireless remote-control of electronic devices with a built-in rechargeable battery toys, etc. (registered trademark) power.

本発明に係る電子機器の制御方法を適用した電子機器としての携帯電話の電源関係についてのブロック図である。 It is a block diagram of the power supply relationship cellular phone as an electronic apparatus to which the control method of an electronic apparatus according to the present invention. (a)は、図1に示した携帯電話のバッテリ電圧監視タイミング図であり、(b)は、図1に示した携帯電話の外部電圧監視タイミング図であり、(c)は、(a)のタイミング図と(b)のタイミング図とを重ね合わせたタイミング図である。 (A) is a battery voltage monitoring timing diagram of the mobile phone shown in FIG. 1, (b) is an external voltage monitoring timing diagram of the mobile phone shown in FIG. 1, (c) is, (a) it is a timing diagram obtained by superimposing the timing diagram of a timing diagram of the (b). 図1に示した携帯電話において間欠充電を行った場合の充電電流と温度変化との関係を示す図である。 It is a diagram showing the relationship between the charging current and the temperature change in the case of performing the intermittent charge in the mobile phone shown in FIG. 図1に示した携帯電話において間欠充電を行わなかった場合の充電電流と温度変化との関係を示す図である。 It is a diagram showing the relationship between the charging current and the temperature change when not performed intermittent charging the mobile phone shown in FIG.

符号の説明 DESCRIPTION OF SYMBOLS

100 携帯電話 101 バッテリ 102 外部I/Oコネクタ 103 抵抗 104 充電制御FET 100 Mobile phone 101 battery 102 external I / O connector 103 resistor 104 charging control FET
105 充電制御IC 105 charging control IC
106 CPU 106 CPU
107 バッテリ電圧監視回路 108 充電制御回路 109 充電電流監視回路 110 外部電圧監視回路 111 充電アダプタ 107 battery voltage monitoring circuit 108 charging control circuit 109 charging current monitoring circuit 110 external voltage monitoring circuit 111 charging adapter

Claims (9)

  1. 外部の充電アダプタを用いて内蔵した二次電池の充電を行う電子機器において、前記二次電池への入力電圧を監視する監視手段と、前記二次電池に接続される充電アダプタに応じて充電方法を切り替える制御手段とを備えたことを特徴とする電子機器。 In an external electronic device to charge the secondary battery with a built using the charging adapter, a monitoring means for monitoring the input voltage to the secondary battery, charging method according to the charging adapter connected to the secondary battery an electronic apparatus characterized by comprising a control means for switching the.
  2. 前記制御手段は、前記充電アダプタの供給能力が所定の値より高い場合には充電動作を停止することを特徴とする請求項1に記載の電子機器。 Wherein, the electronic device according to claim 1, supply capacity of the charging adapter if higher than a predetermined value, characterized in that stops the charging operation.
  3. 前記制御手段は、前記充電アダプタの供給能力が所定の値より高い場合には一定の周期で間欠充電を行うことを特徴とする請求項1に記載の電子機器。 Wherein, the electronic device according to claim 1, supply capacity of the charging adapter if higher than a predetermined value and performs the intermittent charging at a constant period.
  4. 前記間欠充電の周期は充電時間をn分とし、充電停止時間をm分とし、所定の回数行うことを特徴とする請求項3に記載の電子機器。 The electronic device according to claim 3 cycles of the intermittent charge to minutes n a charging time, to minutes m charging stop time, which is characterized in that a predetermined number of times.
  5. 前記監視手段は、一定の時間毎に前記入力電圧を監視し、1回の測定時に所定の回数連続して測定し、その平均値を測定値とすることを特徴とする請求項1に記載の電子機器。 Said monitoring means, said input voltage monitor every predetermined time, one of continuously measuring a predetermined number of times at the time of measurement, according to claim 1, characterized in that the measured value and the average value Electronics.
  6. 前記監視手段は、一定の時間毎に前記入力電圧を監視し、前記入力電圧が2回連続で所定の値を超えた場合前記充電アダプタは定電流回路を持たない充電電流供給能力の高い充電アダプタであると判断することを特徴とする請求項1に記載の電子機器。 Said monitoring means, said input voltage monitor every predetermined time, the input voltage exceeds a predetermined value at two consecutive said charging adapter high charging current supply capability without a constant current circuit charging adapter the electronic device according to claim 1, characterized in that it is determined that the.
  7. 前記制御手段は、前記充電アダプタが定電流回路を持たない充電電流供給能力の高い充電アダプタであると判断し間欠充電制御に移行した際連続した間欠充電制御が設定された時間より長くなった時点で強制的に充電を停止させることを特徴とする請求項6記載の電子機器。 Time the control means, said charging adapter is longer than the time the intermittent charge control consecutive when a transition is set to determine intermittently charge control to be high charging adapter of the charging current supply capability with no constant current circuit the electronic apparatus according to claim 6, wherein the stopping the forced charging in.
  8. 前記制御手段は、充電電流を監視する充電電流監視回路にて検出した充電電流値の読み出しが充電制御ICに対して可能であり、前記入力電圧を監視する外部電圧監視回路と前記二次電池の電圧を監視するバッテリ電圧監視回路で検出した電位差と、前記充電電流監視回路にて検出した充電電流値による熱損失量を算出し、熱損失量が閾値を超えた場合、前記充電アダプタが定電流回路を持たない充電電流供給能力の高い充電アダプタであると判断することを特徴とする請求項1に記載の電子機器。 Wherein the control means is possible for the charge current reading the charge control IC of the charging current value detected by the monitoring circuit for monitoring the charging current, of the secondary battery to an external voltage monitoring circuit for monitoring the input voltage and the potential difference detected by the battery voltage monitoring circuit for monitoring a voltage, calculates the amount of heat loss due to the charging current value detected by the charging current monitoring circuit, when the heat loss amount exceeds the threshold value, the charging adapter is a constant current the electronic device according to claim 1, characterized in that it is determined that the high charging adapter of the charging current supply capability without a circuit.
  9. 外部の充電アダプタを用いて内蔵した二次電池の充電を行う電子機器の充電制御方法において、前記二次電池への入力電圧を監視し、前記二次電池に接続される充電アダプタに応じて充電方法を切り替えることを特徴とする電子機器の充電制御方法。 In the charging control method of an electronic device to charge the secondary battery with a built using an external charger adapter monitors the input voltage to the secondary battery, charged according to the charging adapter connected to the secondary battery charging control method of an electronic device and switches the way.
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