JP2014135895A - Charge control system and method - Google Patents
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Abstract
Description
本発明は、携帯電話機等の携帯機器の充電を制御する充電制御システム及び方法に関するものである。 The present invention relates to a charging control system and method for controlling charging of a mobile device such as a mobile phone.
従来、携帯電話機等では内蔵した充電回路の発熱により携帯端末の温度が上昇することがある。一方、このような携帯電話機等では操作しながら充電することが多く、発熱による火傷防止のため充電を停止する必要がある。従って、使用者に火傷の恐れがあるため充電が必要な状況にも拘わらず、充電を停止してしまい、携帯電話機を使用できない状態に陥ることがある。 2. Description of the Related Art Conventionally, in a mobile phone or the like, the temperature of a mobile terminal may rise due to heat generated by a built-in charging circuit. On the other hand, such a mobile phone or the like is often charged while being operated, and it is necessary to stop charging in order to prevent burns due to heat generation. Therefore, there is a possibility that the user may be burned, so that charging is stopped and the mobile phone cannot be used regardless of the situation where charging is necessary.
このような携帯機器の充電装置に関する発明としては、例えば、特許文献1に電磁誘導を利用して非接触で充電を行う非接触充電システムが記載されている。また、特許文献2には、携帯電話機等の電子機器に内蔵された二次電池を充電するための充電装置が記載されている。 As an invention relating to such a charging device for a portable device, for example, Patent Document 1 describes a non-contact charging system that performs non-contact charging using electromagnetic induction. Patent Document 2 describes a charging device for charging a secondary battery built in an electronic device such as a mobile phone.
特許文献1のものは、被充電機器側から充電のON/OFFによる通信を行うことにより、充電器側でON/OFFによる電圧変化を検出し、その電圧変化に基づいて被充電機器が正規であるか否かを検出するものである。 In Patent Document 1, by performing communication by charging ON / OFF from the device to be charged, a voltage change due to ON / OFF is detected on the charger side, and the device to be charged is normal based on the voltage change. This is to detect whether or not there is.
特許文献2のものは、充電器に配備された一次側充電回路と、電子機器に配備された二次側充電回路とを具備し、二次側充電回路は充電開始時に充電制御用トランジスタをON/OFF制御して充電負荷を所定パターンで変動させる。一次側充電回路はその負荷変動を検知し、充電負荷が所定パターンで変動した時には一次コイルの出力を充電に必要な強磁界に維持し、所定パターンで変動しない時には一次コイルの出力を微弱な磁界に切り換えるというものである。 Patent Document 2 includes a primary side charging circuit provided in a charger and a secondary side charging circuit provided in an electronic device. The secondary side charging circuit turns on a charge control transistor at the start of charging. / OFF control to change the charging load in a predetermined pattern. The primary charging circuit detects the load fluctuation, and when the charging load fluctuates in a predetermined pattern, the primary coil output is maintained in a strong magnetic field necessary for charging, and when it does not fluctuate in the predetermined pattern, the primary coil output is weak magnetic field. It is to switch to.
このように引用文献1、2には、規定外の携帯機器を接続したことによる事故や、充電器への金属物の混入による事故を防止することは記載されているが、携帯機器の温度上昇を抑制することに関しては記載されていない。 Thus, cited references 1 and 2 describe preventing accidents caused by connecting non-regulated portable devices and accidents caused by mixing metal objects into the charger, but the temperature rise of portable devices is described. There is no description regarding the suppression.
本発明の目的は、携帯機器の温度上昇を抑制して携帯機器の温度上昇による充電停止を回避でき、高度な充電管理を行うことが可能な充電制御システム及び方法を提供することにある。 An object of the present invention is to provide a charge control system and method capable of suppressing a temperature rise of a portable device and avoiding a charge stop due to a temperature rise of the portable device and performing advanced charge management.
本発明は、充電電流を供給する充電器と、バッテリを有する携帯機器とを有し、充電器に携帯機器を接続して充電器から供給された充電電流によりバッテリを充電する充電制御に関するものである。携帯機器は充電のオン/オフを行うスイッチと、機器内の温度を検出する温度検出素子を有し、温度検出素子の温度に応じて充電電流値を設定し、その設定した充電電流値をスイッチのオン/オフによるパターンによって充電器に送信する。一方、充電器は携帯機器との間を流れる電流を検出して携帯機器からのオン/オフによるパターンを認識し、そのパターン認識結果に基づいて設定された値の充電電流を携帯機器に供給し、前記温度検出素子の温度が一定値以上の場合は充電を禁止する。 The present invention relates to a charging control that includes a charger for supplying a charging current and a portable device having a battery, and connects the portable device to the charger and charges the battery with a charging current supplied from the charger. is there. The portable device has a switch for turning on / off charging and a temperature detection element for detecting the temperature in the device, sets a charging current value according to the temperature of the temperature detection element, and switches the set charging current value. It is transmitted to the charger according to the pattern of on / off of. On the other hand, the charger detects the current flowing between the portable device, recognizes the pattern due to on / off from the portable device, and supplies the charging current of the value set based on the pattern recognition result to the portable device. When the temperature of the temperature detecting element is equal to or higher than a certain value, charging is prohibited.
本発明によれば、携帯機器から温度に応じた充電電流値をON/OFFによるパターンで充電器に送信し、充電器はそのパターンを認識してその値の充電電流を携帯機器に供給することにより、携帯機器の温度に応じて充電電流を制御することが可能となる。そのため、充電中の携帯機器の温度上昇を抑制でき、携帯機器の温度上昇による充電停止を回避することが可能となる。 According to the present invention, the charging current value corresponding to the temperature is transmitted from the portable device to the charger in an ON / OFF pattern, and the charger recognizes the pattern and supplies the charging current of that value to the portable device. Thus, the charging current can be controlled according to the temperature of the portable device. Therefore, the temperature rise of the portable device during charging can be suppressed, and it is possible to avoid the charging stop due to the temperature rise of the portable device.
次に、発明を実施するための形態について図面を参照して詳細に説明する。図1は本発明に係る充電制御機能を搭載した携帯機器及び外部充電器からなる充電制御システムの一実施形態を示すブロック図である。携帯機器10は、携帯電話機等に代表される被充電機器である。本実施形態では、携帯機器10として携帯電話機を例に挙げて説明するが、図1では本発明の要部構成のみ示しており、その他のアンテナ、無線通信部等の携帯電話機としての構成は省略している。 Next, embodiments for carrying out the invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a charge control system including a portable device equipped with a charge control function according to the present invention and an external charger. The mobile device 10 is a device to be charged represented by a mobile phone or the like. In the present embodiment, a mobile phone will be described as an example of the mobile device 10, but FIG. 1 shows only the configuration of the main part of the present invention, and the configuration of the mobile phone such as other antennas and radio communication units is omitted. doing.
携帯機器10にはCPU101が搭載され、機器内の各部と接続されている。CPU101は機器内の各部を個別に制御することにより各種機能を実現する。特に、CPU101は充電制御回路102を制御し、バッテリ103の充電制御を行う。バッテリ103は携帯機器10の各部に電源を供給する電池である。 The mobile device 10 includes a CPU 101 and is connected to each unit in the device. The CPU 101 realizes various functions by individually controlling each unit in the device. In particular, the CPU 101 controls the charge control circuit 102 and controls the charging of the battery 103. The battery 103 is a battery that supplies power to each unit of the mobile device 10.
スイッチ104は携帯機器10と外部充電器20との間に接続され、充電制御回路102から出力されるVCNT_1信号によってON/OFFを行い、外部充電器20側に情報を送信する。サーミスタ105は機器内の温度を検出する温度検出素子であり、TEST信号として充電制御回路102に出力する。 The switch 104 is connected between the portable device 10 and the external charger 20, and is turned on / off by a VCNT_1 signal output from the charge control circuit 102, and transmits information to the external charger 20 side. The thermistor 105 is a temperature detection element that detects the temperature inside the device, and outputs it to the charge control circuit 102 as a TEST signal.
外部充電器20内には、電流監視回路201、充電制御回路202が配置されている。電流監視回路201はVCHGの電流を監視し、充電制御回路202にVCNT_2信号として出力する。なお、図中203は商用電源に接続するプラグであり、充電制御回路202ではプラグ203から入力された交流電源を直流電源に変換し、且つ、携帯機器10から送信された電流値に制御を行う。 A current monitoring circuit 201 and a charge control circuit 202 are disposed in the external charger 20. The current monitoring circuit 201 monitors the current of VCHG and outputs it as a VCNT_2 signal to the charge control circuit 202. In the figure, reference numeral 203 denotes a plug connected to a commercial power source. The charging control circuit 202 converts the AC power input from the plug 203 into a DC power source and controls the current value transmitted from the portable device 10. .
充電制御回路202は携帯機器10側から受け取ったVCNT_2信号のパターンを認識し、その内容に応じて充電電流を制御する。また、外部充電器20側で出力をON/OFFし、携帯機器10側の充電制御回路102でパターンを認識することにより、外部充電器20側の情報を取得することができる。 The charging control circuit 202 recognizes the pattern of the VCNT_2 signal received from the mobile device 10 side, and controls the charging current according to the content. Further, by turning ON / OFF the output on the external charger 20 side and recognizing the pattern by the charge control circuit 102 on the portable device 10 side, information on the external charger 20 side can be acquired.
次に、本実施形態の充電電流を制御する場合の充電制御方法を図2及び図3を用いて説明する。図2はスイッチ104を制御するVCNT_1信号、電流監視回路201から出力されるVCNT_2信号の一例を示すタイミングチャート、図3は本実施形態の動作を説明するフローチャートである。 Next, the charge control method in the case of controlling the charge current of this embodiment is demonstrated using FIG.2 and FIG.3. FIG. 2 is a timing chart showing an example of the VCNT_1 signal for controlling the switch 104 and the VCNT_2 signal output from the current monitoring circuit 201, and FIG. 3 is a flowchart for explaining the operation of this embodiment.
まず、外部充電器20に携帯機器10が接続され、携帯機器10の充電が開始されると、携帯機器10の充電制御回路102は、例えば、図2に示すようなVCNT_1信号をスイッチ104に供給する。そのため、スイッチ104は図2に示すパターンで交互にON/OFF動作を行い、認証用パターンを送信する。一方、外部充電器20の電流監視回路201は外部充電器20と携帯機器10を接続するVCHGラインの電流を検出し、図2に示すようなVCNT_2信号を充電制御回路202に出力する。 First, when the portable device 10 is connected to the external charger 20 and charging of the portable device 10 is started, the charge control circuit 102 of the portable device 10 supplies a VCNT_1 signal as shown in FIG. To do. Therefore, the switch 104 alternately performs ON / OFF operations in the pattern shown in FIG. 2, and transmits an authentication pattern. On the other hand, the current monitoring circuit 201 of the external charger 20 detects the current of the VCHG line connecting the external charger 20 and the portable device 10 and outputs a VCNT_2 signal as shown in FIG. 2 to the charge control circuit 202.
このようにON/OFFによる携帯機器10から所定認証用パターンを送信することにより、外部充電器20は接続された携帯機器10が正規の携帯機器であるかどうかの認証を行い(ステップS0)、外部充電器20に接続された携帯機器10に問題ないかを確認する。問題がある場合には、携帯機器10側でVCNT_1信号をローレベルに固定することでスイッチ104をOFF状態にして充電を停止させる。認証用パターンは図2のパターンに限ることなく、携帯機器10と外部充電器20との間で決めておく。 Thus, by transmitting a predetermined authentication pattern from the ON / OFF portable device 10, the external charger 20 authenticates whether or not the connected portable device 10 is a legitimate portable device (step S0). It is confirmed whether there is no problem in the portable device 10 connected to the external charger 20. If there is a problem, the charging is stopped by fixing the VCNT_1 signal to the low level on the portable device 10 side to turn off the switch 104. The authentication pattern is not limited to the pattern shown in FIG. 2 but is determined between the portable device 10 and the external charger 20.
ステップS0で問題がないことを確認すると、CPU101はサーミスタ105から携帯機器10内の温度情報を充電制御回路102を通して取得し、携帯機器10内の温度に応じて充電電流の制御を行う。具体的には、ステップS1で、例えば、携帯機器10内の温度が50℃以上あるかどうかを判断し、携帯機器10内の温度が50℃以上の場合には(ステップS1がYES)、VCNT_1信号をローレベルに固定してスイッチ104をOFF状態に維持し、携帯機器10の充電は行わない。 If it is confirmed in step S0 that there is no problem, the CPU 101 acquires temperature information in the portable device 10 from the thermistor 105 through the charging control circuit 102, and controls the charging current according to the temperature in the portable device 10. Specifically, in step S1, for example, it is determined whether or not the temperature in the mobile device 10 is 50 ° C. or higher. If the temperature in the mobile device 10 is 50 ° C. or higher (step S1 is YES), VCNT_1 The signal is fixed at a low level and the switch 104 is maintained in the OFF state, and the portable device 10 is not charged.
一方、ステップS1で携帯機器10内の温度が50℃以下である場合には(ステップS1がNO)、ステップS2に進み、携帯機器10内の温度が45℃以上であるかどうかを判断する。携帯機器10の温度が45℃以上(この場合45℃以上50℃以下)である場合には(ステップS2がYES)、図4に示すコマンド表を参照し、図2に示すようにスタートビット(0H)、コマンド0BH、データ05H、ストップビット(0H)の順にVCNT_1信号を出力し、スイッチ104をON/OFF制御する。 On the other hand, when the temperature in the portable device 10 is 50 ° C. or lower in Step S1 (NO in Step S1), the process proceeds to Step S2, and it is determined whether or not the temperature in the portable device 10 is 45 ° C. or higher. When the temperature of the portable device 10 is 45 ° C. or higher (in this case, 45 ° C. or higher and 50 ° C. or lower) (step S2 is YES), refer to the command table shown in FIG. 0H), command 0BH, data 05H, stop bit (0H) in this order, the VCNT_1 signal is output, and the switch 104 is controlled ON / OFF.
その際、携帯機器10内の温度が45℃以上50℃以下の場合には、例えば、充電電流は350mAとし、充電制御回路102はこの電流値を示すデータ“0101”を図2に示すパターンのデータに組み込んでスイッチ104をON/OFF制御し、VCHGラインを通して外部充電器20側に送信する(図4参照)。 At this time, when the temperature in the portable device 10 is 45 ° C. or more and 50 ° C. or less, for example, the charging current is set to 350 mA, and the charging control circuit 102 sets the data “0101” indicating this current value in the pattern shown in FIG. The switch 104 is incorporated into the data to control ON / OFF of the switch 104 and transmitted to the external charger 20 side through the VCHG line (see FIG. 4).
図4に示すコマンド表は温度が高くなるほど充電電流が小さくなるように設定され、図示しないメモリに格納されている。また、図4に示すコマント表は図2のパターンのデータ部分を4ビットで表しており、例えば、充電電流値が350mAの時は“0101”、充電電流値が600mAの時は“1010”となる。 The command table shown in FIG. 4 is set so that the charging current decreases as the temperature increases, and is stored in a memory (not shown). The command table shown in FIG. 4 represents the data portion of the pattern of FIG. 2 in 4 bits, for example, “0101” when the charging current value is 350 mA and “1010” when the charging current value is 600 mA. Become.
外部充電器20側では電流監視回路201によりVCHGラインの電流を検出し、図2に示すようなVCNT_2信号を充電制御回路202に出力する。充電制御回路202は受け取ったVCNT_2信号のパターンを認識し、図4に示すデータの“0101”から充電電流を350mAに設定して携帯機器10に充電電流を供給する。そのため、携帯機器10のバッテリ103には、スイッチ104、充電制御回路102を介して充電電流350mAが供給され、バッテリ103はこの充電電流350mAで充電される。 On the external charger 20 side, the current monitoring circuit 201 detects the current of the VCHG line and outputs a VCNT_2 signal as shown in FIG. The charging control circuit 202 recognizes the pattern of the received VCNT_2 signal, sets the charging current to 350 mA from the data “0101” shown in FIG. 4 and supplies the charging current to the portable device 10. Therefore, a charging current 350 mA is supplied to the battery 103 of the portable device 10 via the switch 104 and the charging control circuit 102, and the battery 103 is charged with this charging current 350 mA.
また、ステップS2で携帯機器10内の温度が45℃以下の場合には(ステップS2がNO)、ステップS3に進み、携帯機器10内の温度が45℃以下であるかを判断する。携帯機器10内の温度が45℃以下の場合には(ステップS3がYES)、図4に示すコマンド表を参照し、今度はスタートビット(0H)、コマンド0BH、データ0AH、ストップビット(0H)の順にVCNT_1信号を出力し、スイッチ104をON/OFF制御する。携帯機器10内の温度が45℃以下の場合の充電電流は、例えば、600mAとし、スイッチ104のON/OFFによるパターンのデータは図2に示すように“1010”となる。 If the temperature in the portable device 10 is 45 ° C. or lower in step S2 (NO in step S2), the process proceeds to step S3 to determine whether the temperature in the portable device 10 is 45 ° C. or lower. When the temperature in the portable device 10 is 45 ° C. or lower (step S3 is YES), referring to the command table shown in FIG. 4, this time, start bit (0H), command 0BH, data 0AH, stop bit (0H) The VCNT_1 signal is output in this order, and the switch 104 is turned on / off. When the temperature in the portable device 10 is 45 ° C. or lower, the charging current is, for example, 600 mA, and the pattern data when the switch 104 is turned ON / OFF is “1010” as shown in FIG.
外部充電器20側では同様に電流監視回路201によりVCHGラインの電流を検出し、VCNT_2信号を充電制御回路202に出力する。充電制御回路202は受け取ったVCNT_2信号のパターンを認識し、今度は図4に示すデータの“1010”から充電電流を600mAに設定して携帯機器10に充電電流を供給する。そのため、バッテリ103は充電電流600mAで充電される。 Similarly, on the external charger 20 side, the current monitoring circuit 201 detects the current of the VCHG line and outputs the VCNT_2 signal to the charging control circuit 202. The charging control circuit 202 recognizes the pattern of the received VCNT_2 signal, and this time sets the charging current to 600 mA from the data “1010” shown in FIG. 4 and supplies the charging current to the portable device 10. Therefore, the battery 103 is charged with a charging current of 600 mA.
以上の動作を繰り返し行い、ステップS4で充電が終了したところで携帯機器10の充電を終了する。 The above operation is repeated, and the charging of the mobile device 10 is terminated when the charging is terminated in step S4.
このように本実施形態では、携帯機器10から温度に応じた充電電流値をON/OFFによるパターンで充電器20に送信し、充電器20はそのパターンを認識してその値の充電電流を携帯機器10に供給することにより、携帯機器の温度に応じて充電電流を制御することができる。そのため、充電中の携帯機器の温度上昇を抑制でき、携帯機器の温度上昇による充電停止を回避することができる。従って、使用者が携帯機器を操作しながら充電したとしても、火傷の恐れがないばかりか、充電が必要な状況にも拘わらず、携帯機器を使用できない状態に陥ることがない。 As described above, in the present embodiment, the charging current value corresponding to the temperature is transmitted from the portable device 10 to the charger 20 in the ON / OFF pattern, and the charger 20 recognizes the pattern and carries the charging current of the value. By supplying the device 10, the charging current can be controlled according to the temperature of the portable device. Therefore, the temperature rise of the portable device during charging can be suppressed, and the charging stop due to the temperature rise of the portable device can be avoided. Therefore, even if the user charges the battery while operating the mobile device, there is no risk of burns and the mobile device cannot be used in spite of the situation where charging is required.
また、携帯機器と外部充電器との間でON/OFF通信による認証を行い、規定外の携帯機器が接続された場合には、充電を停止するため、規定外の携帯機器を接続することによる事故を未然に防止することができる。更に、携帯機器と外部充電器との間で従来と信号の配線を変える必要がない。 In addition, authentication by ON / OFF communication is performed between the portable device and the external charger, and when a non-standard portable device is connected, charging is stopped, so by connecting a non-standard portable device Accidents can be prevented in advance. Furthermore, there is no need to change the signal wiring between the portable device and the external charger.
なお、図2に示すパターンは携帯機器10の充電に影響を与えない程度の短い時間のパターンであり、この短いパターンで外部充電器20側に温度に応じた充電電流を通知するものとする。また、図2のパターン及び図4のコマンド表は一例であり、携帯機器と外部充電器との間で個別に定義しておくものとする。 Note that the pattern shown in FIG. 2 is a short time pattern that does not affect the charging of the mobile device 10, and the charging current corresponding to the temperature is notified to the external charger 20 by this short pattern. The pattern in FIG. 2 and the command table in FIG. 4 are examples, and are defined individually between the portable device and the external charger.
本発明は、特に、携帯電話機等の充電機能を搭載した携帯機器及び外部充電器からなるシステムに好適に使用することができる。 In particular, the present invention can be suitably used for a system including a mobile device equipped with a charging function such as a mobile phone and an external charger.
10 携帯機器
20 外部充電器
101 CPU
102 充電制御回路
103 バッテリ
104 スイッチ
105 サーミスタ
201 電流監視回路
202 充電制御回路
203 プラグ
10 portable device 20 external charger 101 CPU
102 charge control circuit 103 battery 104 switch 105 thermistor 201 current monitoring circuit 202 charge control circuit 203 plug
Claims (6)
前記携帯機器は、充電のオン/オフを行うスイッチと、機器内の温度を検出する温度検出素子と、前記温度検出素子の温度に応じて充電電流値を設定する手段と、前記設定された充電電流値を前記スイッチのオン/オフによるパターンによって前記充電器に送信する手段とを有し、
前記充電器は、前記携帯機器との間を流れる電流を検出して前記携帯機器からのオン/オフによるパターンを認識する手段と、前記パターン認識結果に基づいて設定された値の充電電流を前記携帯機器に供給する手段とを有し、
前記温度検出素子の温度が一定値以上の場合は充電を禁止することを特徴とする充電制御システム。 The charging control system includes a charger for supplying a charging current and a portable device having a battery, and the portable device is connected to the charger to charge the battery with a charging current supplied from the charger. And
The portable device includes a switch for turning on / off charging, a temperature detecting element for detecting a temperature in the device, a means for setting a charging current value according to the temperature of the temperature detecting element, and the set charging Means for transmitting a current value to the charger according to a pattern by turning on / off the switch;
The charger detects a current flowing between the portable device and recognizes a pattern due to on / off from the portable device; and a charging current having a value set based on the pattern recognition result Means for supplying to a portable device,
The charging control system, wherein charging is prohibited when the temperature of the temperature detecting element is equal to or higher than a certain value.
前記携帯機器は、電流設定手段により温度検出素子で検出された携帯機器内の温度に応じた電流値を設定し、電流値送信手段によりスイッチによるオン/オフのパターンによって前記設定された電流値を前記充電器に送信し、
前記充電器は、パターン認識手段により前記携帯機器との間を流れる電流を検出して前記携帯機器からのオン/オフによるパターンを認識し、電流供給手段により前記パターン認識結果に基づいて設定された値の充電電流を前記携帯機器に供給し、
前記温度検出素子の温度が一定値以上の場合は充電を禁止することを特徴とする充電制御方法。 A charging control method comprising: a charger that supplies a charging current; and a portable device having a battery, and the portable device is connected to the charger and the battery is charged by a charging current supplied from the charger. And
The portable device sets a current value according to the temperature in the portable device detected by the temperature detection element by the current setting unit, and the current value set by the on / off pattern by the switch by the current value transmission unit. Send to the charger,
The charger detects a current flowing between the portable device by a pattern recognition unit and recognizes an on / off pattern from the portable device, and is set based on the pattern recognition result by a current supply unit. Supply charging current to the portable device,
A charging control method, wherein charging is prohibited when the temperature of the temperature detecting element is equal to or higher than a certain value.
The current value transmission means of the portable device creates a pattern by the on / off in the order of start bit, command, data, and stop bit, and incorporates a value indicating the charging current into the data by a predetermined bit in the charger. The charging control method according to claim 4 or 5, wherein the charging is transmitted.
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