WO2012077270A1 - 電子機器 - Google Patents
電子機器 Download PDFInfo
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- WO2012077270A1 WO2012077270A1 PCT/JP2011/005897 JP2011005897W WO2012077270A1 WO 2012077270 A1 WO2012077270 A1 WO 2012077270A1 JP 2011005897 W JP2011005897 W JP 2011005897W WO 2012077270 A1 WO2012077270 A1 WO 2012077270A1
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- Prior art keywords
- usb
- control unit
- battery
- unit
- charging
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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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
Definitions
- the present invention relates to a technology related to USB charging control, and relates to an electronic device having a battery deterioration prevention function that avoids unintended charging by a user by providing a charging start determination when charging via USB is started.
- USB Universal Serial Bus
- USB is a serial interface standard developed by a plurality of companies and used for public computer systems.
- the USB cable conforming to the USB standard has a power line of +5 V, a GND line, and two signal lines of D + / D ⁇ .
- the USB cable conforming to the USB standard enables power supply of +5 V, 500 mA at the same time as transmitting a signal.
- a method of charging using this power source is called USB charging.
- USB-connector has become standardized because the standardization of the Micro-USB connector has made it possible to reduce the size and thickness of the USB connector and mount it on portable devices. It is predicted that it will come.
- Patent Document 1 The technology of Patent Document 1 is one such example.
- the technology of this Patent Document 1 simply connects the output voltage of VBUS to the power line of the mobile phone.
- VBUS is supplied to the charging circuit even when the USB connection is made only for the purpose of communication.
- charging unintended by the user is started, resulting in an increase in the number of unnecessary charging times and a problem of promoting cycle deterioration.
- Patent Document 2 is an example of charging control by supplying power from a USB interface using a general-purpose USB communication cable.
- An electronic device disclosed in Patent Document 2 includes a data communication unit that transmits and receives signals via a USB interface, a battery charge control circuit that charges a battery, and a distribution circuit that distributes VBUS power for data communication and charging And a microcomputer for centrally controlling these circuits.
- the distribution circuit supplies the VBUS power source to the data communication unit when the data communication unit is operating, and supplies the VBUS power source to the battery charging control circuit when the data communication unit is not operating. Switching between communication and charging.
- the electronic device disclosed in Patent Document 2 controls the supply of power to the charging control circuit only by the presence or absence of communication, distribution control of the distribution circuit frequently occurs, that is, charging starts / stops frequently. Will be repeated. Therefore, in the electronic device disclosed in Patent Document 2, it is not possible to stop the promotion of charge cycle deterioration.
- Patent Document 3 discloses a charge start control technology that extends the life of a secondary battery by reducing the number of times of charging.
- the technology disclosed in Patent Document 3 includes a voltage detection unit that detects a voltage of a secondary battery, and a charging device when the voltage of the secondary battery detected by the voltage detection unit falls below a predetermined charging start voltage. Is provided with a switch means for controlling so that the voltage is not supplied from the charging device to the secondary battery when the voltage of the secondary battery is higher than the charging start voltage.
- Patent Document 3 since the technology disclosed in Patent Document 3 has a fixed charging start threshold value, it is desired to charge the battery for a long time, such as a scene where the time interval until the next charging is expected to be long, and to extend the usable time. Even in this case, if the battery voltage is equal to or higher than the threshold, a phenomenon that charging is not started occurs, which is very inconvenient. That is, if the threshold value is set high, the number of times of charging increases, and if the threshold value is set low, the convenience deteriorates, so that the threshold value cannot be uniquely determined in the first place.
- An object of the present invention is to provide an electronic device that solves the above-described problems, prevents cycle deterioration of a battery, and is provided with highly convenient charge control.
- a main body a USB connection unit provided in the main body, a VBUS detection unit that determines that a USB device is connected to the USB connection unit, A USB control unit for detecting whether or not a D + / D ⁇ terminal of the USB connection unit is short-circuited and determining whether or not the connected USB device is a dedicated USB charging device; a battery housed in the main body; A battery monitoring unit that monitors the state of the battery, a charge control unit that charges the battery, and a system that controls the supply of power from the USB device connected to the USB connection unit to the charge control unit An electronic device including a control unit is provided. According to the above configuration, it is provided with means for determining whether or not the connected USB device is a dedicated charging device from the state of the D + / D ⁇ terminal of the USB connection unit when it is detected that the USB device is connected. It is a feature.
- the electronic device determines that the USB dedicated charger is connected as a result of the USB connected device determination, the electronic device performs a charging start determination based on a charging start threshold, and the USB dedicated charger When it is determined that a device other than the device is connected, the charging start determination based on the charging start threshold is not performed.
- an electronic device main body a USB connection unit provided in the electronic device main body, a VBUS detection unit that determines that a USB device is connected to the USB connection unit, and the USB connection
- a USB control unit for detecting the presence or absence of a short circuit of the D + / D ⁇ terminals of the unit, a battery housed in the electronic device body, a battery monitoring unit for monitoring the state of the battery, and charging the battery A charge control unit; a switch that controls supply of power from a USB device connected to the USB connection unit to the charge control unit; and a system control unit that controls the switch and the charge control unit.
- the electronic device When the VBUS detection unit detects the connection of the USB device and the USB control unit determines that the D + / D ⁇ terminals of the USB connection unit are not short-circuited, the electronic device. Control unit, wherein, when the battery voltage obtained from the battery monitoring unit is below a preset threshold, an electronic apparatus, characterized in that starting charging to the battery.
- the VBUS detection unit detects the connection of the USB device, and the USB control unit short-circuits the D + / D ⁇ terminals of the USB connection unit. Is detected, charging of the battery is started.
- the VBUS detection unit detects connection of a USB device, and the USB control unit does not short-circuit the D + / D ⁇ terminals of the USB connection unit.
- the battery voltage obtained from the battery monitoring unit is equal to or higher than a preset threshold value, power supply to the charge control unit is not performed.
- the battery life can be extended by suppressing the acceleration of battery cycle deterioration while ensuring convenience.
- Embodiment 1 is a configuration block diagram of an electronic device 1 according to Embodiment 1 of the present invention.
- Configuration block diagram of electronic device 2 according to Embodiment 2 of the present invention The flowchart which shows operation
- FIG. 1 is a configuration block diagram of an electronic device 1 according to Embodiment 1 of the present invention.
- electronic device 1 according to the first exemplary embodiment of the present invention determines USB connection unit 100 provided in the electronic device main body and that the USB device is connected to USB connection unit 100.
- the VBUS detection unit 101, the USB control unit 102 that observes the state of the D + / D ⁇ terminals of the USB connection unit 100 and determines whether the connected USB device is a dedicated charging device, and the electronic device main body.
- Switch (SW) 106 which is a switch means for switching whether or not to supply the charging control unit 105, the USB control unit 102, and the battery monitoring unit 104.
- SW switch means for switching whether or not to supply the charging control unit 105, the USB control unit 102, and the battery monitoring unit 104.
- SW switch means for switching whether or not to supply the charging control unit 105, the USB control unit 102, and the battery monitoring unit 104.
- SW switch
- (SW) 106 and the system control unit 107 for controlling the charging control unit 105, and a.
- FIG. 2 is a flowchart showing the operation of the electronic device 1 according to the first embodiment of the present invention.
- the electronic device 1 detects that the USB device is connected by the VBUS detection unit 101 (step S 200), and sends the USB to the system control unit 107. It is notified that the device is connected (step S201).
- the system control unit 107 turns off the switch (SW) 106 (step S202).
- SW switch
- the system control unit 107 notifies the USB control unit 102 that the D + / D ⁇ terminal state observation is performed, and the USB control unit 102 indicates the result of the D + / D ⁇ terminal state observation. 107 is notified (step S203). As a result of observing the state of the D + / D ⁇ terminal by the USB control unit 102, if it is determined that the D + / D ⁇ terminal is short-circuited, the system control unit 107 determines that the connected USB device is a dedicated USB charging device. (“Yes” in step S203). Then, the system control unit 107 turns on the switch (SW) 106 (step S205), supplies power to the charging control unit 105, and immediately starts charging the secondary battery 103 (step S206).
- SW switch
- the system control unit 107 uses a general-purpose USB communication cable or the like. It is determined that a device other than the dedicated charger is connected (“No” in step S203). Next, the system control unit 107 obtains battery voltage information from the battery monitoring unit 104 and compares it with a preset charging start threshold (step S204). When the battery voltage is equal to or lower than the charge start threshold (“Yes” in step S204), the system control unit 107 turns on the switch (SW) 106 (step S205), supplies power to the charge control unit 105, and starts charging. (Step S206). When the battery voltage is equal to or higher than the charging start threshold (“No” in step S204), the system control unit 107 turns off the switch (SW) 106 until the battery voltage becomes equal to or lower than the charging start threshold, and does not start charging.
- the battery start determination is performed based on the charge start threshold only when a device other than the USB charge dedicated device is connected, thereby ensuring the convenience of charging and the battery. Acceleration of cycle deterioration can be suppressed and battery life can be extended.
- the description has been made so that the determination is made from the result of the single threshold determination in consideration of the processing time.
- the present invention is not limited thereto, and the result of the threshold determination performed a plurality of times. You may judge from.
- the system control unit 107 compares the battery voltage included in the battery voltage information obtained from the battery monitoring unit 104 with a preset charging start threshold of the battery voltage. Is going.
- the value of the battery voltage obtained from the battery monitoring unit 104 is an example of battery voltage information. Therefore, in the electronic device 2 according to Embodiment 2, another example of battery voltage information will be described.
- FIG. 3 is a configuration block diagram of the electronic device 2 according to Embodiment 2 of the present invention.
- the same number is used for the same configuration as the first embodiment.
- the electronic device 2 determines the USB connection unit 100 provided in the electronic device main body and that the USB device is connected to the USB connection unit 100.
- the VBUS detection unit 101, the USB control unit 102 that observes the state of the D + / D ⁇ terminals of the USB connection unit 100 and determines whether the connected USB device is a dedicated charging device, and the electronic device main body.
- a secondary battery 103 a battery monitoring unit 204 that monitors the state of the secondary battery 103, a charge control unit 105 that charges the secondary battery 103, and a USB device connected to the USB connection unit 100
- the switch (SW) 106 which is a switch means for switching whether to supply power to the charging control unit 105, and from the USB control unit 102 and the battery monitoring unit 204.
- a system control unit 207 for controlling the switch (SW) 106 and a charging control unit 105, and a.
- the electronic device 2 according to the second embodiment is different from the electronic device 1 according to the first embodiment in that the battery remaining amount included in the battery voltage information obtained by the system control unit 207 from the battery monitoring unit 204. And a preset charge remaining threshold value for the remaining battery level.
- FIG. 4 is a flowchart showing the operation of the electronic device 2 according to the second embodiment of the present invention.
- the electronic device 2 detects that the USB device is connected by the VBUS detection unit 101 (step S300), and sends the USB to the system control unit 207. It is notified that the device is connected (step S301).
- the system control unit 207 turns off the switch (SW) 106 (step S302).
- SW switch
- the system control unit 207 notifies the USB control unit 102 that the D + / D ⁇ terminal state observation is performed, and the USB control unit 102 indicates the result of the D + / D ⁇ terminal state observation. Notification to 207 (step S303).
- the system control unit 207 determines that the connected USB device is a dedicated USB charging device. (“Yes” in step S303). Then, the system control unit 207 turns on the switch (SW) 106 (step S305), supplies power to the charging control unit 105, and immediately starts charging the secondary battery 103 (step S306).
- SW switch
- the system control unit 207 uses a general-purpose USB communication cable or the like. It is determined that a device other than the dedicated charger is connected (“No” in step S303). Next, the system control unit 207 obtains battery voltage information from the battery monitoring unit 204 and compares it with a preset charging start threshold (step S304). If the remaining battery level is equal to or lower than the charging start threshold, the system control unit 207 turns on the switch (SW) 106 (step S305), supplies power to the charging control unit 105, and starts charging (step S306). If the remaining battery level is equal to or higher than the charging start threshold (“No” in step S304), the system control unit 207 turns off the switch (SW) 106 until the remaining battery level becomes equal to or lower than the threshold, and does not start charging.
- SW switch
- the battery start determination is performed based on the charge start threshold only when a device other than the USB charge dedicated device is connected, thereby ensuring the convenience of charging and the battery. Acceleration of cycle deterioration can be suppressed and battery life can be extended.
- the description has been made so that the determination is made from the result of the single threshold determination in consideration of the processing time.
- the present invention is not limited to this, and the result of the threshold determination performed a plurality of times. You can judge.
- the electric device having the function of performing the charge start control according to the detection result of the connected USB device according to the present invention suppresses the promotion of battery cycle deterioration and extends the battery life while ensuring the convenience of charging. There is an effect that can be.
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Abstract
Description
上記構成によれば、USB機器が接続されたこと検出した際に、USB接続部のD+/D-端子の状態から接続されたUSB機器が充電専用機か否かを判別する手段を有することを特徴としている。
図1は、本発明の実施の形態1に係る電子機器1の構成ブロック図である。図1を参照すると、本発明の実施形態実施の形態1に係る電子機器1は、電子機器本体に設けられたUSB接続部100と、USB接続部100にUSB機器が接続されたことを判別するVBUS検出部101と、USB接続部100のD+/D-端子の状態を観測し、接続されたUSB機器が充電専用機器か否かを判別するUSB制御部102と、電子機器本体に収納された2次電池103と、2次電池103の状態を監視する電池監視部104と、2次電池103に対して充電を行う充電制御部105と、USB接続部100に接続されたUSB機器からの電力を充電制御部105に対して供給するか否かを切り替えるスイッチ手段であるスイッチ(SW)106と、USB制御部102と電池監視部104からの出力に基づき、スイッチ(SW)106と充電制御部105とを制御するシステム制御部107と、を備えている。
次に、システム制御部107は、VBUS検出部101よりUSB機器が接続されたことを通知されると、スイッチ(SW)106をOFFする(ステップS202)。
なお、ステップS201では、USB機器が電子機器1に接続されたか否かをVBUSが検出されたか否かで判定する。
そして、システム制御部107はスイッチ(SW)106をONし(ステップS205)、充電制御部105へ電力を供給し、直ちに2次電池103への充電を開始する(ステップS206)。
次にシステム制御部107は、電池監視部104より電池電圧情報を入手し、予め設定した充電開始閾値と比較を行う(ステップS204)。電池電圧が充電開始閾値以下の場合(ステップS204の「Yes」)、システム制御部107はスイッチ(SW)106をONし(ステップS205)、充電制御部105へ電力を供給して充電を開始する(ステップS206)。
なお、電池電圧が充電開始閾値以上の場合は(ステップS204の「No」)、システム制御部107は電池電圧が充電開始閾値以下になるまでスイッチ(SW)106をOFFし、充電を開始しない。
なお、本実施の形態において、処理時間を考慮して1回の閾値判定の結果から判断するように説明を行ったが、本発明はそれに限定されることなく、閾値判定を複数回行った結果から判断しても構わない。
次に、本発明の実施の形態2の動作について図3、4を参照して詳細に説明する。図3は、本発明の実施の形態2に係る電子機器2の構成ブロック図である。本発明の実施の形態2に係る電子機器2の構成は、実施の形態1と同じ構成については、同じ番号を用いる。
次に、システム制御部207は、VBUS検出部101よりUSB機器が接続されたことを通知されると、スイッチ(SW)106をOFFする(ステップS302)。
なお、ステップS201では、USB機器が電子機器2に接続されたか否かをVBUSが検出されたか否かで判定する。
そして、システム制御部207はスイッチ(SW)106をONし(ステップS305)、充電制御部105へ電力を供給し、直ちに2次電池103への充電を開始する(ステップS306)。
次にシステム制御部207は、電池監視部204より電池電圧情報を入手し、予め設定した充電開始閾値と比較を行う(ステップS304)。電池残量が充電開始閾値以下の場合、システム制御部207はスイッチ(SW)106をONし(ステップS305)、充電制御部105へ電力を供給して充電を開始する(ステップS306)。
なお、電池残量が充電開始閾値以上の場合は(ステップS304の「No」)、システム制御部207は電池残量が閾値以下になるまでスイッチ(SW)106をOFFし、充電を開始しない。
100 USB接続部
101 VBUS検出部
102 USB制御部
103 2次電池
104、204 電池監視部
105 充電制御部
106 スイッチ(SW)
107、207 システム制御部
Claims (3)
- 電子機器本体と、
前記電子機器本体に設けられたUSB接続部と、
前記USB接続部にUSB機器が接続されたことを判別するVBUS検出部と、
前記USB接続部のD+/D-端子の短絡の有無を検出するUSB制御部と、
前記電子機器本体に収納された電池と、
前記電池の状態を監視する電池監視部と、
前記電池に対して充電を行う充電制御部と、
前記USB接続部に接続されたUSB機器からの電力を前記充電制御部に対して供給を制御するスイッチと、
前記スイッチと前記充電制御部を制御するシステム制御部とを備え、
前記VBUS検出部が前記USB機器の接続を検出し、
前記USB制御部が前記USB接続部のD+/D-端子が短絡されていないと判断すると、
前記システム制御部は、前記電池監視部から得られた電池電圧が予め設定された閾値以下の場合には、前記電池に対して充電を開始することを特徴とする電子機器。 - 前記VBUS検出部で前記USB機器の接続を検出し、
前記USB制御部にて前記USB接続部のD+/D-端子が短絡されていることを判断すると、
前記電池に対して充電を開始することを特徴とする請求項1に記載の電子機器。 - 前記VBUS検出部でUSB機器の接続を検出し、前記USB制御部にて前記USB接続部のD+/D-端子が短絡されていないことを検出すると、
前記電池監視部から得られた電池電圧が、予め設定された閾値以上の場合には、前記充電制御部への電力供給を行わないとすることを特徴とする請求項1又は請求項2記載の電子機器。
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US13/643,461 US20130049680A1 (en) | 2010-12-07 | 2011-10-20 | Electronic device |
JP2012507496A JP5005845B2 (ja) | 2010-12-07 | 2011-10-20 | 電子機器 |
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JP2010272194 | 2010-12-07 | ||
JP2010-272194 | 2010-12-07 |
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Also Published As
Publication number | Publication date |
---|---|
US20130049680A1 (en) | 2013-02-28 |
JP5005845B2 (ja) | 2012-08-22 |
JP2012182987A (ja) | 2012-09-20 |
JPWO2012077270A1 (ja) | 2014-05-19 |
JP5669320B2 (ja) | 2015-02-12 |
JP2015092820A (ja) | 2015-05-14 |
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