WO2013015123A1 - Device with built-in battery - Google Patents

Device with built-in battery Download PDF

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Publication number
WO2013015123A1
WO2013015123A1 PCT/JP2012/067769 JP2012067769W WO2013015123A1 WO 2013015123 A1 WO2013015123 A1 WO 2013015123A1 JP 2012067769 W JP2012067769 W JP 2012067769W WO 2013015123 A1 WO2013015123 A1 WO 2013015123A1
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WO
WIPO (PCT)
Prior art keywords
battery
built
power
power transmission
charging
Prior art date
Application number
PCT/JP2012/067769
Other languages
French (fr)
Japanese (ja)
Inventor
洋由 山本
真一 板垣
玉井　幹隆
Original Assignee
三洋電機株式会社
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Filing date
Publication date
Application filed by 三洋電機株式会社 filed Critical 三洋電機株式会社
Publication of WO2013015123A1 publication Critical patent/WO2013015123A1/en

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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
    • H01M10/46—Accumulators structurally combined with charging apparatus
    • 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
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • 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
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
    • 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
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • H02J7/00034—Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
    • 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 battery built-in device such as a battery pack or a mobile phone provided with a rechargeable built-in battery, and more particularly to a battery built-in device including a built-in battery that is charged by carrying power by electromagnetic induction from a charging stand.
  • a battery built-in device has been developed in which power is transferred from a power transmission coil to a power reception coil by the action of electromagnetic induction, and the built-in battery is charged with power transferred from a charging stand. (See Patent Document 1)
  • Patent Document 1 describes a structure in which a power transmission coil that is excited by an AC power supply is built in a charging stand, and a battery that is electromagnetically coupled to the power transmission coil is built in a battery pack that is a battery built-in device. Further, the battery pack includes a circuit that rectifies the alternating current induced in the power receiving coil and supplies the battery to the battery for charging. According to this structure, the battery pack can be charged in a non-contact state by placing the battery pack on the charging stand.
  • the charging method in which the power transmission coil and the power receiving coil are electromagnetically coupled and the charging power of the battery is transmitted from the charging stand to the battery built-in device is, whether the battery built-in device such as a battery pack is powered from the charging stand. It is necessary to determine whether the charging stand is in a power transmission state or a non-power transmission state. This is to prevent wasteful power consumption of the internal battery in the non-power transmission state. For example, when the battery built-in device is removed from the charging stand and enters a non-power transmission state, the control circuit that controls charging of the built-in battery can be switched to the sleep state to eliminate wasteful power consumption. In addition, a battery built-in device including a pilot lamp that displays a charge state of the built-in battery needs to turn off the pilot lamp in a non-power transmission state.
  • the battery built-in device that determines a power transmission state in which power is transmitted from the charging stand and a non-power transmission state in which power is not transmitted detects an AC signal induced in the power receiving coil. This is because an AC signal is induced in the power receiving coil in the power transmission state and is not induced in the non-power transmission state.
  • the AC signal of the power receiving coil can be realized by an analog circuit that detects a peak voltage.
  • this circuit configuration requires a dedicated analog circuit in order to detect the peak voltage, so that there is a drawback that the circuit configuration is complicated and the component cost is increased.
  • This problem can be eliminated as a circuit that converts an AC signal induced in the power receiving coil into a digital signal by an A / D conversion circuit and makes a determination based on the output value of the digital signal.
  • a battery built-in device that incorporates an A / D conversion circuit and a microprocessor to control charging of the built-in battery must use the A / D conversion circuit and the microprocessor together to distinguish between a power transmission state and a non-power transmission state. Thus, it is possible to distinguish between the power transmission state and the non-power transmission state without providing any dedicated circuit.
  • the battery built-in device converts an AC signal induced in the power receiving coil into a digital signal by an A / D conversion circuit, detects an output of the A / D conversion circuit by a microprocessor, and transmits a power transmission state and a non-power transmission state. Can be determined.
  • the A / D conversion circuit converts an AC signal induced in the power receiving coil into a digital signal at a predetermined sampling period, and outputs the digital signal to the microprocessor.
  • a state in which any one of the digital signals successively input from the A / D conversion circuit is higher than a set value is a power transmission state, and a state where all the digital signals are lower than a set value is a non-power transmission state. judge.
  • FIG. 1 shows an AC signal induced in the power receiving coil in a state where the power transmitting coil carries power, that is, in a power transmitting state.
  • the A / D conversion circuit converts an alternating current signal into a digital signal at a constant cycle indicated by A, B, C, D..., That is, at a constant sampling cycle, and outputs it to the microprocessor.
  • the digital signal output from the A / D conversion circuit to the microprocessor fluctuates or does not become zero level. For this reason, the microprocessor compares the input digital signal with the set value, and determines that any digital signal is higher than the set value as the power transmission state.
  • the microprocessor determines that the state in which all signal levels input from the A / D conversion circuit are smaller than the set value is the non-power transmission state.
  • the sampling period of the A / D conversion circuit is synchronized with the frequency of the power transmission coil, and further, 0 of the AC signal induced in the power transmission coil.
  • the A / D conversion circuit converts to a digital signal in synchronization with the level, the digital signal output from the A / D conversion circuit is always 0 level. For this reason, the microprocessor cannot detect the AC signal induced in the power receiving coil, and there is a problem that the microprocessor erroneously determines that it is in the non-power transmission state despite the power transmission state.
  • the above disadvantages are eliminated. it can.
  • devices that carry power from a charging stand to a battery built-in device by magnetic induction do not specify a combination of the battery built-in device and the charging stand, and various battery built-in devices are charged by various charging stands.
  • the sampling cycle of the A / D conversion circuit of the built-in device and the AC frequency output from the charging stand cannot be set so as not to always synchronize. For this reason, in a specific combination, there is an adverse effect that the battery built-in device side erroneously determines that it is in the non-power transmission state even though the charging stand is in the power transmission state.
  • This adverse effect can be reduced by using an A / D conversion circuit that samples the A / D conversion circuit extremely short, that is, at a high speed.
  • the A / D conversion circuit with a short sampling period has high component costs, and even if it is set to a high speed, the frequency of the alternating current output from the power transmission coil of the charging stand is not specified. The probability of synchronizing with the sampling period cannot be completely eliminated. For this reason, the battery built-in device that determines the power transmission state and the non-power transmission state by converting the AC signal induced in the power receiving coil into a digital signal by the A / D conversion circuit has a drawback that it cannot be accurately determined by a specific combination. is there.
  • An important object of the present invention is to provide a battery built-in device that has a very simple circuit configuration and can accurately determine the power transmission state and the non-power transmission state of a charging stand without using a high-speed A / D conversion circuit. There is.
  • the battery built-in device of the present invention is a battery built-in device including a power receiving coil 11 that is electromagnetically coupled to the power transmission coil 41 of the charging base 4 to be set and supplies charging power to the built-in battery 12 for charging.
  • the AC detection circuit 17 detects an AC signal output from the AC signal 41.
  • the AC detection circuit 17 detects an AC signal induced in the power receiving coil 11 or a pulsating flow after rectification in which the AC is rectified.
  • the AC detection circuit 17 converts an analog signal induced in the power receiving coil 11 or a rectified analog signal into a digital signal, and transmits power from the charging stand 4 from the output of the A / D conversion circuit 18.
  • the A / D conversion circuit 18 converts the signal induced in the power receiving coil 11 or the rectified signal into a digital signal at random timing and outputs the digital signal to the microprocessor 19.
  • the signal input from the D conversion circuit 18 determines the power transmission state and the non-power transmission state.
  • the above-mentioned battery built-in devices use an inexpensive A / D conversion circuit without using a high-speed and expensive A / D conversion circuit, and further simplify the circuit configuration while maintaining a power transmission state and a non-power transmission state.
  • An A / D conversion circuit that converts an analog signal into a digital signal at random timing does not convert an AC signal or a rectified pulsating current induced in the power receiving coil at a constant sampling period into a digital signal.
  • the alternating current signal induced in the power receiving coil or the rectified pulsating flow changes at a constant frequency, that is, at a constant period.
  • the A / D conversion circuit converts an AC signal induced in the power receiving coil or a rectified pulsating flow into a digital signal at a timing that varies randomly rather than at a constant period. Therefore, the timing at which the A / D conversion circuit converts the AC signal induced in the power receiving coil or the pulsating flow after rectification into a digital signal does not always synchronize with the 0 level of the AC signal, and the AC signal is supplied to the power receiving coil.
  • a signal of a predetermined output level is output from the A / D conversion circuit to the microprocessor at any timing. Therefore, in a state where an AC signal is induced in the power receiving coil, that is, in a power transmission state of the charging stand, a predetermined level signal is input to the microprocessor at any timing, and the microprocessor accurately determines the power transmission state. .
  • the above battery built-in device does not need to determine the power transmission state and the non-power transmission state by shortening the sampling period of the A / D conversion circuit. For this reason, it is not necessary to use an A / D conversion circuit having a short sampling period, that is, high speed and high component cost, and the power transmission state can be accurately detected using an inexpensive A / D conversion circuit.
  • the A / D conversion circuit converts the period of conversion into a digital signal at random, the AC signal induced in the power receiving coil or the rectified pulsating flow is converted into a digital signal. It is possible to accurately determine the power transmission state and the non-power transmission state with a very simple circuit configuration in which the period of conversion into a signal is changed.
  • the battery built-in device of the present invention includes a charging load 20 that operates by supplying operating power from the built-in battery 12, and supplies the operating power to the charging load 20 in a state in which the microprocessor 19 determines that the power transmission state.
  • the supply of operating power from the built-in battery 12 to the charging load 20 can be cut off in a state in which it is determined as a non-power transmission state.
  • the above-described battery built-in device can reliably determine the non-power transmission state and can perform this state, and since it does not supply operating power from the built-in battery to the load during charging, it has a feature that can prevent wasteful power consumption of the built-in battery.
  • the battery built-in device of the present invention supplies operating power from the built-in battery 12 to the load 20 during charging, and also supplies DC power rectified from the alternating current induced in the power receiving coil 11, and the microprocessor 19 determines that it is in a non-power transmission state. In this state, the operating power supplied from the built-in battery 12 to the charging load 20 can be cut off.
  • the above-mentioned battery built-in devices can operate stably with both the built-in battery and the power induced in the power receiving coil in the state of supplying power to the load during charging. In addition, it is possible to eliminate wasteful power consumption of the built-in battery in a non-power transmission state.
  • the charging load 20 can include a control circuit 15 that controls the charge state of the built-in battery 12.
  • the above-mentioned battery built-in devices can charge the built-in battery in a favorable state by controlling the charge state of the built-in battery with the control circuit, and in the non-power transmission state where the built-in battery is not charged, the built-in battery by the control circuit There is a feature that can reduce wasteful power consumption.
  • the load 20 at the time of charging can be used as the indicator 30 that indicates the charged state of the built-in battery 12.
  • the above battery-equipped devices accurately display the charge status of the built-in battery to the user with the display in the power transmission state, and stop displaying on the display device in the non-power transmission state to reduce unnecessary power consumption.
  • the user can accurately display that the built-in battery is not charged.
  • FIG. 3 shows a block diagram of the charging stand 4 and the battery built-in device 1.
  • the battery built-in device 1 includes a built-in battery 12 that is set on the charging stand 4 and is charged with electric power transmitted from the charging stand 4.
  • the battery built-in device 1 includes a power receiving coil 11 that is electromagnetically coupled to a power transmission coil 41 of a charging base 4 to be set and supplies charging power to the built-in battery 12 for charging. Further, the battery built-in device 1 includes an AC detection circuit 13 that detects an AC signal output from the power transmission coil 41.
  • the charging stand 4 includes a power transmission coil 41 and an AC power source 42 connected to the power transmission coil 41. Furthermore, although not shown, the charging stand 4 is provided with a horizontal placing base on which the battery built-in device 1 is placed on the upper surface, and the power transmission coil 41 is disposed on the lower surface of the placing base.
  • the power transmission coil 41 is electromagnetically coupled to the power reception coil 11 of the battery built-in device 1 set on the platform, and transmits power to the power reception coil 11 by magnetic induction.
  • the AC power supply 42 detects that the battery-equipped device 1 is set on the platform and supplies AC power to the power transmission coil 41. This AC power supply 42 can detect that the battery built-in device 1 has been set on the platform by detecting a change in impedance of the power transmission coil 41.
  • the AC power supply 41 can also detect that the battery built-in device is set by a limit switch or the like that is turned on and off by the battery built-in device set on the platform.
  • the AC power supply 42 supplies AC power to the power transmission coil 41 in a state where the battery built-in device 1 is set on the platform.
  • the battery built-in device 1 set on the charging stand 4 is connected between a power receiving coil 11, a rectifier circuit 13 that rectifies AC power induced in the power receiving coil 11, and a rectifier circuit 13 and a built-in battery 12.
  • a switching element 14 that controls charging of the internal battery 12 and a control circuit 15 that switches the switching element 14 on and off are provided.
  • the power receiving coil 11 is disposed at a position where the battery built-in device 1 is close to the power transmitting coil 41 and efficiently electromagnetically coupled in a state where the battery built-in device 1 is set on the charging stand 4.
  • the battery built-in device 1 of FIG. 3 inputs the output of the power receiving coil 11 to the rectifier circuit 13 via the capacitor 16.
  • the rectifier circuit 13 rectifies the alternating current supplied from the power receiving coil 11 and converts it into direct current to charge the built-in battery 12, and supplies operating power to the control circuit 15.
  • FIG. 3 shows the rectifier circuit 13 as a single diode, but the rectifier circuit 13 rectifies the alternating current by switching the FET connected to the bridge on and off in synchronization with the alternating current induced in the power receiving coil 11.
  • a synchronous rectifier circuit that converts to direct current is suitable. This is because the voltage drop of the FET is small, and the current can be rectified efficiently and with little heat generation.
  • any circuit that can convert alternating current induced in the receiving coil 11 into direct current such as a diode bridge, can be used for the rectifier circuit.
  • the switching element 14 is controlled on and off by the control circuit 15.
  • the switching element 14 in the on state supplies the direct current output from the rectifier circuit 13 to the internal battery 12 to charge it.
  • the switching element 14 is switched off when the built-in battery 12 is fully charged or is in an abnormal state and stops charging.
  • the control circuit 15 detects the full charge of the built-in battery 12 and controls the switching element 14 from on to off, and detects the temperature of the built-in battery 12 to control the switching element 14.
  • the control circuit 15 turns on the switching element 14 until the built-in battery 12 is fully charged, and charges the built-in battery 12 with the direct current output from the rectifier circuit 13.
  • the control circuit 15 detects this, switches the switching element 14 from on to off, and terminates the charging of the internal battery 12.
  • the control circuit 15 detects a state in which the temperature of the internal battery 12 is higher than the set temperature
  • the control circuit 15 switches the switching element 14 to OFF and stops charging.
  • the control circuit 15 can adjust the current and voltage for charging the built-in battery 12 to optimum values by controlling the duty for switching the switching element 14 on and off.
  • the battery built-in device 1 includes an AC detection circuit 17 that detects a power transmission state and a non-power transmission state.
  • the AC detection circuit 17 detects an AC signal induced in the power receiving coil 11 and determines the power transmission state of the charging stand 4.
  • the AC detection circuit 17 in FIG. 3 includes an A / D conversion circuit 18 that converts an analog signal induced in the power receiving coil 11 into a digital signal, and the power transmission state of the charging stand 4 from the output of the A / D conversion circuit 18.
  • the A / D conversion circuit 18 does not convert the AC signal induced in the power receiving coil 11 at a constant sampling cycle into a digital signal.
  • the A / D conversion circuit 18 converts a signal induced in the power receiving coil 11 at a random timing into a digital signal and outputs the digital signal to the microprocessor 19.
  • FIG. 4 shows the timing at which the A / D conversion circuit 18 converts the AC signal induced in the power receiving coil 11 into a digital signal by A, B, C, D. As shown in this figure, the A / D conversion circuit 18 randomly changes the time interval of the timing for conversion to a digital signal without converting it to a digital signal at a constant period.
  • the A / D conversion circuit 18 includes an A / D converter (not shown) that converts an AC signal of the power receiving coil 11 into a digital signal, and a trigger circuit (not shown) that inputs a trigger signal to the A / D converter. It has.
  • the trigger circuit specifies the timing at which the analog signal input to the A / D converter is converted into a digital signal.
  • the trigger circuit inputs a trigger signal that randomly changes the time interval to the A / D converter.
  • the A / D converter converts the analog signal input from the power receiving coil 11 into a digital signal at the timing when the trigger signal is input from the trigger circuit, and outputs the digital signal to the microprocessor 19.
  • the microprocessor 19 compares the digital signal input from the A / D conversion circuit 18 with the set value, and determines the power transmission state and the non-power transmission state.
  • the microprocessor 19 receives a signal converted into a digital signal every time the A / D converter converts the AC signal of the power receiving coil 11 into a digital signal.
  • an AC signal is induced from the power transmitting coil 41 to the power receiving coil 11 by magnetic induction.
  • the A / D converter converts an AC signal induced in the power receiving coil 11 into a digital signal at a timing shown in FIG.
  • the digital signal input from the A / D converter to the microprocessor 19 is not limited to the level of the signal input at any timing as long as the AC signal is induced in the power receiving coil 11. At any timing, it becomes larger than the 0 level. Therefore, the microprocessor 19 can determine that any of the input digital signals is larger than the set value and determine the power transmission state.
  • the digital signal output from the A / D converter to the microprocessor 19 is always 0 level. Therefore, the microprocessor 19 determines that the input digital signal is lower than the set value and the non-power transmission state.
  • the above AC detection circuit 17 connects the input line 21 of the A / D conversion circuit 18 to the output side of the power receiving coil 11, and converts the AC signal induced in the power receiving coil 11 into A / D. It is detected by the conversion circuit 18.
  • the AC detection circuit is a voltage after rectification, and the pulsating current of half-wave rectification or full-wave rectification is detected by the A / D conversion circuit to determine the power transmission state and the non-power transmission state of the charging stand. it can.
  • the AC detection circuit detects a rectified pulsating flow obtained by rectifying the AC induced in the power receiving coil by an A / D conversion circuit, and determines a power transmission state of the charging stand. As shown by a chain line in FIG.
  • this AC detection circuit detects the pulsating flow after rectification by connecting the input line 22 of the A / D conversion circuit 18 to the output side of the rectification circuit 13.
  • the A / D conversion circuit 18 also converts the AC signal, which is a pulsating flow after rectification, into a digital signal at random timing without converting it into a digital signal at a constant period, and outputs it to the microprocessor 19. Therefore, in this specification, AC is used in a broad sense including not only AC of sine waves but also pulsating current that is output from the rectifier circuit and changes with time.
  • the battery built-in device 1 includes a charging load 20 to which operating power is supplied from the built-in battery 12 in a state in which the microprocessor 19 determines that the power is being transmitted.
  • the charging load 20 includes a control circuit 15 that controls the charging state of the built-in battery 12, and a display 30 that indicates the charging state of the built-in battery 12.
  • the battery built-in device 1 supplies operating power from the built-in battery 12 to the charging load 20 in a state where the microprocessor 19 determines that it is in a power transmission state. The supply of operating power to 20 is cut off. Therefore, useless power consumption of the internal battery 12 in the non-power transmission state can be prevented.
  • the battery built-in device 1 supplies operating power from the built-in battery 12 to the load 20 during charging in a state in which the microprocessor 19 determines that the power is being transmitted, and also includes DC power obtained by rectifying alternating current induced in the power receiving coil 11. In the state where the microprocessor 19 can determine that it is in the non-power transmission state, the operating power supplied from the built-in battery 12 to the charging load 20 can be cut off.
  • the control circuit 15 When the AC detection circuit 17 determines that the above-described battery built-in device 1 is in the power transmission state, the control circuit 15 is turned on, the switching element 14 is turned on, and the built-in battery 12 is charged with the power induced in the power receiving coil 11. Further, the display 30 displays to the user that the internal battery 12 is in a charged state.
  • the indicator 30 shown in the figure is a pilot lamp 31 composed of LEDs. The pilot lamp 31 is turned on to indicate that the built-in battery 12 is in a charged state.
  • the display can be a liquid crystal display or the like.
  • the switching element 14 is turned off by the microprocessor 19 or the transmission power is not supplied to the microprocessor 19, so that the shutdown state is established. There is no output from the control circuit 15 and the switching element 14 is turned off. Then, the battery built-in device 1 switches the control circuit 15 to the sleep mode and turns off the pilot lamp 31 that is the display device 30 to eliminate useless power consumption of the built-in battery 12.
  • the battery built-in device 1 in FIG. 3 is a mobile phone, and is composed of a battery pack 2 and a main device 3.
  • the battery built-in device 1 determines the power transmission state and the non-power transmission state with the battery pack 2 and transmits the information to the main device 3.
  • the main device 3 turns on the pilot lamp 31 in the power transmission state and turns off the pilot lamp 31 in the non-power transmission state.
  • an FET switch 32 is connected in series with the LED that is the pilot lamp 31, and the FET switch 32 is controlled to be turned on and off by the AC detection circuit 17.
  • the battery built-in device 1 in this figure lights the pilot lamp 31 in the power transmission state and turns off the pilot lamp 31 in the non-power transmission state, but the battery built-in device 1 composed of the battery pack 2 and the main body device 3 A signal indicating the power transmission state and the non-power transmission state is transmitted to the device 3 and various controls are performed on the main device 3 side, for example, power is supplied from the outside in the power transmission state. It is also possible to control such that the display is brightened or continuously displayed without turning off the liquid crystal display.
  • the battery built-in device 1 in FIG. 3 is composed of the battery pack 2 and the main body device 3, but the battery built-in device 1 of the present invention is not necessarily composed of the pack battery 2 and the main body device 3.
  • the battery 2 can be used alone.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

[Problem] To accurately determine the electricity supply state and non-electricity supply state of a charging station, using an extremely simply circuit configuration. [Solution] A device with a built-in battery comprises: a power-receiving coil that is electromagnetically coupled with a power-supplying coil in a charging station and charges a built-in battery; and an AC detection circuit that detects an AC signal guided to the power-receiving coil or a post-rectification pulsating current in which this alternating current has been rectified, and determines the electricity supply state of the charging station. The AC detection circuit comprises an A/D conversion circuit that converts into a digital signal an analog signal induced to the power-receiving coil or a rectified analog signal; and a microprocessor that determines the electricity supply state of the charging station from the output of the A/D conversion circuit. The A/D conversion circuit converts at a random timing the signal induced to the power-receiving coil or the rectified signal to a digital signal and outputs same to the microprocessor, and the microprocessor determines electricity supply states and non-electricity supply states, using the signals input from the A/D conversion circuit.

Description

電池内蔵機器Built-in battery equipment
　本発明は、充電できる内蔵電池を備えているパック電池や携帯電話などの電池内蔵機器に関し、とくに、充電台から電磁誘導作用で電力搬送して充電される内蔵電池を備える電池内蔵機器に関する。 The present invention relates to a battery built-in device such as a battery pack or a mobile phone provided with a rechargeable built-in battery, and more particularly to a battery built-in device including a built-in battery that is charged by carrying power by electromagnetic induction from a charging stand.
　電磁誘導の作用で送電コイルから受電コイルに電力搬送して、充電台から搬送される電力で内蔵電池を充電する電池内蔵機器は開発されている。（特許文献１参照） A battery built-in device has been developed in which power is transferred from a power transmission coil to a power reception coil by the action of electromagnetic induction, and the built-in battery is charged with power transferred from a charging stand. (See Patent Document 1)
　特許文献１は、充電台に、交流電源で励磁される送電コイルを内蔵し、電池内蔵機器であるパック電池には送電コイルに電磁結合される受電コイルを内蔵する構造を記載する。さらに、パック電池は、受電コイルに誘導される交流を整流し、これを電池に供給して充電する回路も内蔵する。この構造によると、充電台の上にパック電池を載せて、非接触状態でパック電池の電池を充電できる。 Patent Document 1 describes a structure in which a power transmission coil that is excited by an AC power supply is built in a charging stand, and a battery that is electromagnetically coupled to the power transmission coil is built in a battery pack that is a battery built-in device. Further, the battery pack includes a circuit that rectifies the alternating current induced in the power receiving coil and supplies the battery to the battery for charging. According to this structure, the battery pack can be charged in a non-contact state by placing the battery pack on the charging stand.
特開平９－６３６５５号公報Japanese Patent Laid-Open No. 9-63655
　送電コイルと受電コイルとを電磁結合して、電池の充電電力を充電台から電池内蔵機器に伝送する充電方式は、パック電池などの電池内蔵機器が、充電台から電力搬送されているかどうか、すなわち、充電台が送電状態にあるか、非送電状態にあるかを判定する必要がある。それは、非送電状態における内蔵電池の無駄な電力消費を防止するためである。たとえば、電池内蔵機器が充電台から外されて非送電状態となると、内蔵電池の充電をコントロールする制御回路をスリープ状態に切り換えて無駄な電力消費を解消できる。また、内蔵電池の充電状態を表示するパイロットランプを備える電池内蔵機器は、非送電状態においてはパイロットランプを消灯する必要がある。 The charging method in which the power transmission coil and the power receiving coil are electromagnetically coupled and the charging power of the battery is transmitted from the charging stand to the battery built-in device is, whether the battery built-in device such as a battery pack is powered from the charging stand. It is necessary to determine whether the charging stand is in a power transmission state or a non-power transmission state. This is to prevent wasteful power consumption of the internal battery in the non-power transmission state. For example, when the battery built-in device is removed from the charging stand and enters a non-power transmission state, the control circuit that controls charging of the built-in battery can be switched to the sleep state to eliminate wasteful power consumption. In addition, a battery built-in device including a pilot lamp that displays a charge state of the built-in battery needs to turn off the pilot lamp in a non-power transmission state.
　充電台から電力が送電される送電状態と、電力が送電されない非送電状態とを判定する電池内蔵機器は、受電コイルに誘導される交流信号を検出する。受電コイルは、送電状態において交流信号が誘導され、非送電状態において交流信号が誘導されないからである。受電コイルの交流信号は、ピーク電圧を検出するアナログ回路で実現できる。ただ、この回路構成は、ピーク電圧を検出するために専用のアナログ回路を設ける必要があるので、回路構成が複雑で部品コストが高くなる欠点がある。この弊害は、受電コイルに誘導される交流信号をＡ／Ｄ変換回路でデジタル信号に変換し、このデジタル信号の出力値で判定する回路として解消できる。とくに、内蔵電池の充電をコントロールするためにＡ／Ｄ変換回路とマイクロプロセッサを内蔵している電池内蔵機器は、Ａ／Ｄ変換回路とマイクロプロセッサを送電状態と非送電状態の判別に併用することで、専用の回路を全く設けることなく、送電状態と非送電状態とを判別できる。 The battery built-in device that determines a power transmission state in which power is transmitted from the charging stand and a non-power transmission state in which power is not transmitted detects an AC signal induced in the power receiving coil. This is because an AC signal is induced in the power receiving coil in the power transmission state and is not induced in the non-power transmission state. The AC signal of the power receiving coil can be realized by an analog circuit that detects a peak voltage. However, this circuit configuration requires a dedicated analog circuit in order to detect the peak voltage, so that there is a drawback that the circuit configuration is complicated and the component cost is increased. This problem can be eliminated as a circuit that converts an AC signal induced in the power receiving coil into a digital signal by an A / D conversion circuit and makes a determination based on the output value of the digital signal. In particular, a battery built-in device that incorporates an A / D conversion circuit and a microprocessor to control charging of the built-in battery must use the A / D conversion circuit and the microprocessor together to distinguish between a power transmission state and a non-power transmission state. Thus, it is possible to distinguish between the power transmission state and the non-power transmission state without providing any dedicated circuit.
　この電池内蔵機器は、受電コイルに誘導される交流信号を、Ａ／Ｄ変換回路でデジタル信号に変換し、Ａ／Ｄ変換回路の出力をマイクロプロセッサで検出して、送電状態と非送電状態とを判別できる。Ａ／Ｄ変換回路は、受電コイルに誘導される交流信号を、所定のサンプリング周期でデジタル信号に変換して、マイクロプロセッサに出力する。マイクロプロセッサは、Ａ／Ｄ変換回路から次々と入力されるデジタル信号の何れかのレベルが、設定値よりも高い状態を送電状態、全てのデジタル信号が設定値よりも低い状態を非送電状態と判定する。 The battery built-in device converts an AC signal induced in the power receiving coil into a digital signal by an A / D conversion circuit, detects an output of the A / D conversion circuit by a microprocessor, and transmits a power transmission state and a non-power transmission state. Can be determined. The A / D conversion circuit converts an AC signal induced in the power receiving coil into a digital signal at a predetermined sampling period, and outputs the digital signal to the microprocessor. In the microprocessor, a state in which any one of the digital signals successively input from the A / D conversion circuit is higher than a set value is a power transmission state, and a state where all the digital signals are lower than a set value is a non-power transmission state. judge.
　図１は送電コイルが電力搬送する状態、すなわち送電状態において受電コイルに誘導される交流信号を示している。この図において、Ａ／Ｄ変換回路は、Ａ、Ｂ、Ｃ、Ｄ・・・で示す一定の周期で、なわち、一定のサンプリング周期で交流信号をデジタル信号に変換してマイクロプロセッサに出力する。送電状態において、Ａ／Ｄ変換回路からマイクロプロセッサに出力されるデジタル信号は変動し、あるいは０レベルとならない。このため、マイクロプロセッサは、入力されるデジタル信号を設定値に比較して、何れかのデジタル信号が設定値よりも高い状態を送電状態と判定する。非送電状態にあっては、Ａ／Ｄ変換回路からマイクロプロセッサに入力される全ての信号のレベルが設定値よりも低くなる。したがって、マイクロプロセッサは、Ａ／Ｄ変換回路から入力される全ての信号レベルが設定値よりも小さい状態を非送電状態と判定する。 FIG. 1 shows an AC signal induced in the power receiving coil in a state where the power transmitting coil carries power, that is, in a power transmitting state. In this figure, the A / D conversion circuit converts an alternating current signal into a digital signal at a constant cycle indicated by A, B, C, D..., That is, at a constant sampling cycle, and outputs it to the microprocessor. . In the power transmission state, the digital signal output from the A / D conversion circuit to the microprocessor fluctuates or does not become zero level. For this reason, the microprocessor compares the input digital signal with the set value, and determines that any digital signal is higher than the set value as the power transmission state. In the non-power transmission state, the level of all signals input from the A / D conversion circuit to the microprocessor is lower than the set value. Therefore, the microprocessor determines that the state in which all signal levels input from the A / D conversion circuit are smaller than the set value is the non-power transmission state.
　しかしながら、図２のａ、ｂ、ｃ、ｄ・・・で示すタイミングで、すなわち、Ａ／Ｄ変換回路のサンプリング周期が送電コイルの周波数に同期し、さらに送電コイルに誘導される交流信号の０レベルに同期して、Ａ／Ｄ変換回路がデジタル信号に変換する場合、Ａ／Ｄ変換回路から出力されるデジタル信号が常に０レベルとなる。このため、マイクロプロセッサは、受電コイルに誘導される交流信号を検出できなくなって、送電状態であるにもかかわらず、誤って非送電状態と判定する弊害が発生する。Ａ／Ｄ変換回路のサンプリング周期が送電コイルに誘導される交流信号に同期しないように、送電コイルの交流周波数と、Ａ／Ｄ変換回路のサンプリング周期とを設定することで、以上の弊害は解消できる。ただ、磁気誘導作用で充電台から電池内蔵機器に電力搬送する機器は、電池内蔵機器と充電台との組み合わせが特定されず、種々の電池内蔵機器が種々の充電台で充電されるので、電池内蔵機器のＡ／Ｄ変換回路のサンプリング周期と、充電台から出力される交流の周波数とを、つねに同期しないようには設定できない。このため、特定の組み合わせにあっては、充電台が送電状態にあるにもかかわらず、電池内蔵機器側で非送電状態と誤って判定する弊害が発生する。 However, at the timings indicated by a, b, c, d... In FIG. 2, that is, the sampling period of the A / D conversion circuit is synchronized with the frequency of the power transmission coil, and further, 0 of the AC signal induced in the power transmission coil. When the A / D conversion circuit converts to a digital signal in synchronization with the level, the digital signal output from the A / D conversion circuit is always 0 level. For this reason, the microprocessor cannot detect the AC signal induced in the power receiving coil, and there is a problem that the microprocessor erroneously determines that it is in the non-power transmission state despite the power transmission state. By setting the AC frequency of the power transmission coil and the sampling period of the A / D conversion circuit so that the sampling period of the A / D conversion circuit is not synchronized with the AC signal induced in the power transmission coil, the above disadvantages are eliminated. it can. However, devices that carry power from a charging stand to a battery built-in device by magnetic induction do not specify a combination of the battery built-in device and the charging stand, and various battery built-in devices are charged by various charging stands. The sampling cycle of the A / D conversion circuit of the built-in device and the AC frequency output from the charging stand cannot be set so as not to always synchronize. For this reason, in a specific combination, there is an adverse effect that the battery built-in device side erroneously determines that it is in the non-power transmission state even though the charging stand is in the power transmission state.
　この弊害は、Ａ／Ｄ変換回路のサンプリング周期を極めて短く、すなわち、高速にサンプリングするＡ／Ｄ変換回路を使用して少なくできる。ただ、サンプリング周期の短いＡ／Ｄ変換回路は部品コストが高く、また高速に設定しても、充電台の送電コイルから出力される交流の周波数が特定されないので、この周波数がＡ／Ｄ変換回路のサンプリング周期に同期する確率を皆無にはできない。このため、受電コイルに誘導される交流信号をＡ／Ｄ変換回路でデジタル信号に変換して、送電状態と非送電状態とを判定する電池内蔵機器は、特定の組み合わせで正確に判定できない欠点がある。 This adverse effect can be reduced by using an A / D conversion circuit that samples the A / D conversion circuit extremely short, that is, at a high speed. However, the A / D conversion circuit with a short sampling period has high component costs, and even if it is set to a high speed, the frequency of the alternating current output from the power transmission coil of the charging stand is not specified. The probability of synchronizing with the sampling period cannot be completely eliminated. For this reason, the battery built-in device that determines the power transmission state and the non-power transmission state by converting the AC signal induced in the power receiving coil into a digital signal by the A / D conversion circuit has a drawback that it cannot be accurately determined by a specific combination. is there.
　本発明は、この欠点を解決することを目的に開発されたものである。本発明の重要な目的は、極めて簡単な回路構成とし、かつ高速のＡ／Ｄ変換回路を使用することなく、充電台の送電状態と非送電状態とを正確に判定できる電池内蔵機器を提供することにある。 The present invention was developed for the purpose of solving this drawback. An important object of the present invention is to provide a battery built-in device that has a very simple circuit configuration and can accurately determine the power transmission state and the non-power transmission state of a charging stand without using a high-speed A / D conversion circuit. There is.
課題を解決するための手段及び発明の効果Means for Solving the Problems and Effects of the Invention
　本発明の電池内蔵機器は、セットされる充電台４の送電コイル４１に電磁結合されて、内蔵電池１２に充電電力を供給して充電する受電コイル１１を備える電池内蔵機器であって、送電コイル４１から出力される交流信号を検出する交流検出回路１７を備えており、この交流検出回路１７が、受電コイル１１に誘導される交流信号またはこの交流が整流された整流後の脈流を検出して、充電台４の送電状態を判定している。交流検出回路１７は、受電コイル１１に誘導されるアナログ信号または整流後のアナログ信号をデジタル信号に変換するＡ／Ｄ変換回路１８と、このＡ／Ｄ変換回路１８の出力から充電台４の送電状態と非送電状態とを判定するマイクロプロセッサ１９とを備えている。電池内蔵機器は、Ａ／Ｄ変換回路１８が、ランダムなタイミングで受電コイル１１に誘導される信号または整流後の信号をデジタル信号に変換してマイクロプロセッサ１９に出力し、マイクロプロセッサ１９がＡ／Ｄ変換回路１８から入力される信号で、送電状態と非送電状態とを判定している。 The battery built-in device of the present invention is a battery built-in device including a power receiving coil 11 that is electromagnetically coupled to the power transmission coil 41 of the charging base 4 to be set and supplies charging power to the built-in battery 12 for charging. The AC detection circuit 17 detects an AC signal output from the AC signal 41. The AC detection circuit 17 detects an AC signal induced in the power receiving coil 11 or a pulsating flow after rectification in which the AC is rectified. Thus, the power transmission state of the charging stand 4 is determined. The AC detection circuit 17 converts an analog signal induced in the power receiving coil 11 or a rectified analog signal into a digital signal, and transmits power from the charging stand 4 from the output of the A / D conversion circuit 18. And a microprocessor 19 for determining the state and the non-power transmission state. In the battery built-in device, the A / D conversion circuit 18 converts the signal induced in the power receiving coil 11 or the rectified signal into a digital signal at random timing and outputs the digital signal to the microprocessor 19. The signal input from the D conversion circuit 18 determines the power transmission state and the non-power transmission state.
　以上の電池内蔵機器は、高速で高価なＡ／Ｄ変換回路を使用することなく、安価なＡ／Ｄ変換回路を使用し、さらに、回路構成も簡単にしながら、送電状態と非送電状態とを正確に判定できる特徴がある。それは、Ａ／Ｄ変換回路が、ランダムなタイミングで受電コイルに誘導される交流信号またはこの交流が整流された整流後の脈流をデジタル信号に変換するからである。ランダムなタイミングでアナログ信号をデジタル信号に変換するＡ／Ｄ変換回路は、一定のサンプリング周期で受電コイルに誘導される交流信号または整流後の脈流をデジタル信号に変換しない。受電コイルに誘導される交流信号または整流後の脈流は、一定の周波数、すなわち一定の周期で変化する。これに対して、Ａ／Ｄ変換回路は、受電コイルに誘導される交流信号または整流後の脈流を、一定の周期ではなくランダムに変動するタイミングでデジタル信号に変換する。このため、Ａ／Ｄ変換回路が受電コイルに誘導される交流信号または整流後の脈流をデジタル信号に変換するタイミングが、常に交流信号の０レベルに同期することがなく、受電コイルに交流信号が誘導される状態では、何れかのタイミングでＡ／Ｄ変換回路からマイクロプロセッサに所定の出力レベルの信号が出力される。このため、受電コイルに交流信号が誘導される状態、すなわち充電台の送電状態において、マイクロプロセッサには何れかのタイミングで所定のレベルの信号が入力され、マイクロプロセッサは正確に送電状態を判定する。 The above-mentioned battery built-in devices use an inexpensive A / D conversion circuit without using a high-speed and expensive A / D conversion circuit, and further simplify the circuit configuration while maintaining a power transmission state and a non-power transmission state. There is a feature that can be determined accurately. This is because the A / D conversion circuit converts an alternating current signal induced in the power receiving coil at random timing or a rectified pulsating current obtained by rectifying the alternating current into a digital signal. An A / D conversion circuit that converts an analog signal into a digital signal at random timing does not convert an AC signal or a rectified pulsating current induced in the power receiving coil at a constant sampling period into a digital signal. The alternating current signal induced in the power receiving coil or the rectified pulsating flow changes at a constant frequency, that is, at a constant period. On the other hand, the A / D conversion circuit converts an AC signal induced in the power receiving coil or a rectified pulsating flow into a digital signal at a timing that varies randomly rather than at a constant period. Therefore, the timing at which the A / D conversion circuit converts the AC signal induced in the power receiving coil or the pulsating flow after rectification into a digital signal does not always synchronize with the 0 level of the AC signal, and the AC signal is supplied to the power receiving coil. In the state in which is induced, a signal of a predetermined output level is output from the A / D conversion circuit to the microprocessor at any timing. Therefore, in a state where an AC signal is induced in the power receiving coil, that is, in a power transmission state of the charging stand, a predetermined level signal is input to the microprocessor at any timing, and the microprocessor accurately determines the power transmission state. .
　さらに、以上の電池内蔵機器は、Ａ／Ｄ変換回路のサンプリング周期を短くして、送電状態と非送電状態とを判定する必要がない。このため、サンプリング周期が短く、すなわち高速で部品コストの高いＡ／Ｄ変換回路を使用する必要がなく、安価なＡ／Ｄ変換回路を使用して、送電状態を正確に検出できる。また、Ａ／Ｄ変換回路がデジタル信号に変換する周期をランダムに変動させて、受電コイルに誘導される交流信号または整流後の脈流をデジタル信号に変換するので、Ａ／Ｄ変換回路がデジタル信号に変換する周期を変動させるという、極めて簡単な回路構成で送電状態と非送電状態とを正確に判定できる。 Furthermore, the above battery built-in device does not need to determine the power transmission state and the non-power transmission state by shortening the sampling period of the A / D conversion circuit. For this reason, it is not necessary to use an A / D conversion circuit having a short sampling period, that is, high speed and high component cost, and the power transmission state can be accurately detected using an inexpensive A / D conversion circuit. In addition, since the A / D conversion circuit converts the period of conversion into a digital signal at random, the AC signal induced in the power receiving coil or the rectified pulsating flow is converted into a digital signal. It is possible to accurately determine the power transmission state and the non-power transmission state with a very simple circuit configuration in which the period of conversion into a signal is changed.
　本発明の電池内蔵機器は、内蔵電池１２から動作電力を供給して動作する充電時負荷２０を備えて、マイクロプロセッサ１９が送電状態と判定する状態で充電時負荷２０に動作電力を供給し、非送電状態と判定する状態で内蔵電池１２から充電時負荷２０への動作電力の供給を遮断することができる。
　以上の電池内蔵機器は、非送電状態を確実に判定して、この状態でき、内蔵電池から充電時負荷に動作電力を供給しないので、内蔵電池の無駄な電力消費を防止できる特徴がある。 The battery built-in device of the present invention includes a charging load 20 that operates by supplying operating power from the built-in battery 12, and supplies the operating power to the charging load 20 in a state in which the microprocessor 19 determines that the power transmission state. The supply of operating power from the built-in battery 12 to the charging load 20 can be cut off in a state in which it is determined as a non-power transmission state.
The above-described battery built-in device can reliably determine the non-power transmission state and can perform this state, and since it does not supply operating power from the built-in battery to the load during charging, it has a feature that can prevent wasteful power consumption of the built-in battery.
　本発明の電池内蔵機器は、充電時負荷２０に内蔵電池１２から動作電力を供給すると共に、受電コイル１１に誘導される交流を整流した直流電力も供給し、マイクロプロセッサ１９が非送電状態と判定する状態で、内蔵電池１２から充電時負荷２０に供給される動作電力を遮断することができる。
　以上の電池内蔵機器は、充電時負荷を、内蔵電池と、受電コイルに誘導される電力の両方で動作状態とすることで、充電時負荷に電力を供給する状態では安定して、充電時負荷に動作電力を供給でき、さらに、非送電状態にあっては内蔵電池の無駄な電力消費を解消できる。 The battery built-in device of the present invention supplies operating power from the built-in battery 12 to the load 20 during charging, and also supplies DC power rectified from the alternating current induced in the power receiving coil 11, and the microprocessor 19 determines that it is in a non-power transmission state. In this state, the operating power supplied from the built-in battery 12 to the charging load 20 can be cut off.
The above-mentioned battery built-in devices can operate stably with both the built-in battery and the power induced in the power receiving coil in the state of supplying power to the load during charging. In addition, it is possible to eliminate wasteful power consumption of the built-in battery in a non-power transmission state.
　本発明の電池内蔵機器は、充電時負荷２０が、内蔵電池１２の充電状態をコントロールする制御回路１５を備えることができる。
　以上の電池内蔵機器は、制御回路で内蔵電池の充電状態をコントロールすることで、内蔵電池を好ましい状態で充電でき、しかも、内蔵電池を充電しない非送電状態にあっては、制御回路による内蔵電池の無駄な電力消費を削減できる特徴がある。 In the battery built-in device of the present invention, the charging load 20 can include a control circuit 15 that controls the charge state of the built-in battery 12.
The above-mentioned battery built-in devices can charge the built-in battery in a favorable state by controlling the charge state of the built-in battery with the control circuit, and in the non-power transmission state where the built-in battery is not charged, the built-in battery by the control circuit There is a feature that can reduce wasteful power consumption.
　本発明の電池内蔵機器は、充電時負荷２０を、内蔵電池１２の充電状態を示す表示器３０とすることができる。
　以上の電池内蔵機器は、送電状態では表示器によりユーザーに内蔵電池の充電状態を正確に表示し、さらに、非送電状態にあっては表示器による表示を中止して、無駄な電力消費を削減すると共に、ユーザーには内蔵電池が充電されない状態にあることを正確に表示できる。 In the battery built-in device of the present invention, the load 20 at the time of charging can be used as the indicator 30 that indicates the charged state of the built-in battery 12.
The above battery-equipped devices accurately display the charge status of the built-in battery to the user with the display in the power transmission state, and stop displaying on the display device in the non-power transmission state to reduce unnecessary power consumption. In addition, the user can accurately display that the built-in battery is not charged.
受電コイルに誘導される交流信号をＡ／Ｄ変換回路が一定のサンプリング周期でデジタル信号に変換する一例を示す図である。It is a figure which shows an example in which the A / D conversion circuit converts the alternating current signal induced | guided | derived to a receiving coil into a digital signal with a fixed sampling period. 受電コイルに誘導される交流信号をＡ／Ｄ変換回路が一定のサンプリング周期でデジタル信号に変換する他の一例を示す図である。It is a figure which shows another example in which the A / D conversion circuit converts the alternating current signal induced | guided | derived to a receiving coil into a digital signal with a fixed sampling period. 本発明の一実施例にかかる電池内蔵機器のブロック図である。It is a block diagram of the battery built-in apparatus concerning one Example of this invention. 図３に示す電池内蔵機器のＡ／Ｄ変換回路が受電コイルに誘導される交流信号をデジタル信号に変換する一例を示す図である。It is a figure which shows an example in which the A / D conversion circuit of the battery built-in apparatus shown in FIG. 3 converts the alternating current signal induced | guided | derived to a receiving coil into a digital signal.
　以下、本発明の実施例を図面に基づいて説明する。ただし、以下に示す実施例は、本発明の技術思想を具体化するための電池内蔵機器を例示するものであって、本発明は電池内蔵機器を以下のものに特定しない。さらに、この明細書は、特許請求の範囲を理解しやすいように、実施例に示される部材に対応する番号を、「特許請求の範囲」および「課題を解決するための手段の欄」に示される部材に付記している。ただ、特許請求の範囲に示される部材を、実施例の部材に特定するものでは決してない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the examples shown below exemplify battery built-in devices for embodying the technical idea of the present invention, and the present invention does not specify battery built-in devices as follows. Further, in this specification, in order to facilitate understanding of the scope of claims, numbers corresponding to the members shown in the examples are indicated in the “claims” and “means for solving problems” sections. It is added to the members. However, the members shown in the claims are not limited to the members in the embodiments.
　図３は、充電台４と電池内蔵機器１のブロック図を示している。電池内蔵機器１は、充電台４にセットされて、充電台４から送電される電力で充電される内蔵電池１２を備えている。この電池内蔵機器１は、セットされる充電台４の送電コイル４１に電磁結合されて、内蔵電池１２に充電電力を供給して充電する受電コイル１１を備える。さらに、この電池内蔵機器１は、送電コイル４１から出力される交流信号を検出する交流検出回路１３を備えている。 FIG. 3 shows a block diagram of the charging stand 4 and the battery built-in device 1. The battery built-in device 1 includes a built-in battery 12 that is set on the charging stand 4 and is charged with electric power transmitted from the charging stand 4. The battery built-in device 1 includes a power receiving coil 11 that is electromagnetically coupled to a power transmission coil 41 of a charging base 4 to be set and supplies charging power to the built-in battery 12 for charging. Further, the battery built-in device 1 includes an AC detection circuit 13 that detects an AC signal output from the power transmission coil 41.
　充電台４は、送電コイル４１と、この送電コイル４１に接続している交流電源４２を備えている。さらに、充電台４は、図示しないが、上面に電池内蔵機器１を載せる水平の載せ台を備えており、この載せ台の下面に送電コイル４１を配置している。送電コイル４１は、載せ台にセットされる電池内蔵機器１の受電コイル１１に電磁結合され、磁気誘導作用で受電コイル１１に電力を伝送する。交流電源４２は、載せ台に電池内蔵機器１がセットされる状態にあることを検出して、送電コイル４１に交流電力を供給する。この交流電源４２は、送電コイル４１のインピーダンスの変化を検出して、載せ台に電池内蔵機器１がセットされたことを検出できる。送電コイル４１に受電コイル１１が電磁結合される状態と、電磁結合されない状態とで送電コイル４１のインピーダンスが変化するからである。ただ、交流電源は、載せ台にセットされる電池内蔵機器でオンオフに切り換えられるリミットスイッチ等で、電池内蔵機器がセットされたことを検出することもできる。載せ台に電池内蔵機器１がセットされる状態で、交流電源４２は送電コイル４１に交流電力を供給する。 The charging stand 4 includes a power transmission coil 41 and an AC power source 42 connected to the power transmission coil 41. Furthermore, although not shown, the charging stand 4 is provided with a horizontal placing base on which the battery built-in device 1 is placed on the upper surface, and the power transmission coil 41 is disposed on the lower surface of the placing base. The power transmission coil 41 is electromagnetically coupled to the power reception coil 11 of the battery built-in device 1 set on the platform, and transmits power to the power reception coil 11 by magnetic induction. The AC power supply 42 detects that the battery-equipped device 1 is set on the platform and supplies AC power to the power transmission coil 41. This AC power supply 42 can detect that the battery built-in device 1 has been set on the platform by detecting a change in impedance of the power transmission coil 41. This is because the impedance of the power transmission coil 41 varies depending on whether the power reception coil 11 is electromagnetically coupled to the power transmission coil 41 or not. However, the AC power supply can also detect that the battery built-in device is set by a limit switch or the like that is turned on and off by the battery built-in device set on the platform. The AC power supply 42 supplies AC power to the power transmission coil 41 in a state where the battery built-in device 1 is set on the platform.
　充電台４にセットされる電池内蔵機器１は、受電コイル１１と、この受電コイル１１に誘導される交流電力を整流する整流回路１３と、整流回路１３と内蔵電池１２との間に接続されて、内蔵電池１２の充電を制御するスイッチング素子１４と、このスイッチング素子１４をオンオフに切り換える制御回路１５とを備えている。 The battery built-in device 1 set on the charging stand 4 is connected between a power receiving coil 11, a rectifier circuit 13 that rectifies AC power induced in the power receiving coil 11, and a rectifier circuit 13 and a built-in battery 12. A switching element 14 that controls charging of the internal battery 12 and a control circuit 15 that switches the switching element 14 on and off are provided.
　受電コイル１１は、電池内蔵機器１が充電台４にセットされる状態で、送電コイル４１に接近して効率よく電磁結合される位置に配置される。図３の電池内蔵機器１は、受電コイル１１の出力をコンデンサー１６を介して整流回路１３に入力している。 The power receiving coil 11 is disposed at a position where the battery built-in device 1 is close to the power transmitting coil 41 and efficiently electromagnetically coupled in a state where the battery built-in device 1 is set on the charging stand 4. The battery built-in device 1 of FIG. 3 inputs the output of the power receiving coil 11 to the rectifier circuit 13 via the capacitor 16.
　整流回路１３は、受電コイル１１から供給される交流を整流して直流に変換して内蔵電池１２を充電し、また制御回路１５に動作電力を供給する。図３は、整流回路１３をひとつのダイオードで示しているが、整流回路１３は、受電コイル１１に誘導される交流に同期して、ブリッジに接続しているＦＥＴをオンオフに切り換えて交流を整流して直流に変換する同期整流回路が適している。ＦＥＴの電圧降下が小さくて、効率よく、しかも少ない発熱で整流できるからである。ただ、整流回路にはダイオードブリッジなど、受電コイル１１に誘導される交流を直流に変換できる全ての回路が使用できる。 The rectifier circuit 13 rectifies the alternating current supplied from the power receiving coil 11 and converts it into direct current to charge the built-in battery 12, and supplies operating power to the control circuit 15. FIG. 3 shows the rectifier circuit 13 as a single diode, but the rectifier circuit 13 rectifies the alternating current by switching the FET connected to the bridge on and off in synchronization with the alternating current induced in the power receiving coil 11. Thus, a synchronous rectifier circuit that converts to direct current is suitable. This is because the voltage drop of the FET is small, and the current can be rectified efficiently and with little heat generation. However, any circuit that can convert alternating current induced in the receiving coil 11 into direct current, such as a diode bridge, can be used for the rectifier circuit.
　スイッチング素子１４は、制御回路１５でオンオフに制御される。オン状態のスイッチング素子１４は、整流回路１３から出力される直流を内蔵電池１２に供給してこれを充電する。内蔵電池１２が満充電され、あるいは異常な状態となって充電を停止する状態で、スイッチング素子１４はオフに切り換えられる。 The switching element 14 is controlled on and off by the control circuit 15. The switching element 14 in the on state supplies the direct current output from the rectifier circuit 13 to the internal battery 12 to charge it. The switching element 14 is switched off when the built-in battery 12 is fully charged or is in an abnormal state and stops charging.
　制御回路１５は、内蔵電池１２の満充電を検出して、スイッチング素子１４をオンからオフに制御し、また、内蔵電池１２の温度を検出してスイッチング素子１４を制御する。制御回路１５は、内蔵電池１２が満充電されるまでスイッチング素子１４をオン状態として、整流回路１３から出力される直流で内蔵電池１２を充電する。内蔵電池１２が満充電されると、制御回路１５はこのことを検出して、スイッチング素子１４をオンからオフに切り換えて、内蔵電池１２の充電を終了する。また、制御回路１５は、内蔵電池１２の温度が設定温度よりも高くなる状態を検出すると、スイッチング素子１４をオフに切り換えて充電を停止する。さらに、制御回路１５は、スイッチング素子１４をオンオフに切り換えるデューティーをコントロールして、内蔵電池１２を充電する電流や電圧を最適値に調整することもできる。 The control circuit 15 detects the full charge of the built-in battery 12 and controls the switching element 14 from on to off, and detects the temperature of the built-in battery 12 to control the switching element 14. The control circuit 15 turns on the switching element 14 until the built-in battery 12 is fully charged, and charges the built-in battery 12 with the direct current output from the rectifier circuit 13. When the internal battery 12 is fully charged, the control circuit 15 detects this, switches the switching element 14 from on to off, and terminates the charging of the internal battery 12. Further, when the control circuit 15 detects a state in which the temperature of the internal battery 12 is higher than the set temperature, the control circuit 15 switches the switching element 14 to OFF and stops charging. Further, the control circuit 15 can adjust the current and voltage for charging the built-in battery 12 to optimum values by controlling the duty for switching the switching element 14 on and off.
　さらに、電池内蔵機器１は、送電状態と非送電状態とを検出する交流検出回路１７を備えている。交流検出回路１７は、受電コイル１１に誘導される交流信号を検出して、充電台４の送電状態を判定する。図３の交流検出回路１７は、受電コイル１１に誘導されるアナログ信号をデジタル信号に変換するＡ／Ｄ変換回路１８と、このＡ／Ｄ変換回路１８の出力から充電台４の送電状態と非送電状態とを判定するマイクロプロセッサ１９とを備える。 Furthermore, the battery built-in device 1 includes an AC detection circuit 17 that detects a power transmission state and a non-power transmission state. The AC detection circuit 17 detects an AC signal induced in the power receiving coil 11 and determines the power transmission state of the charging stand 4. The AC detection circuit 17 in FIG. 3 includes an A / D conversion circuit 18 that converts an analog signal induced in the power receiving coil 11 into a digital signal, and the power transmission state of the charging stand 4 from the output of the A / D conversion circuit 18. A microprocessor 19 for determining a power transmission state;
　Ａ／Ｄ変換回路１８は、一定のサンプリング周期で受電コイル１１に誘導される交流信号をデジタル信号に変換しない。このＡ／Ｄ変換回路１８は、ランダムなタイミングで受電コイル１１に誘導される信号をデジタル信号に変換してマイクロプロセッサ１９に出力する。図４は、Ａ／Ｄ変換回路１８が受電コイル１１に誘導される交流信号をデジタル信号に変換するタイミングをＡ、Ｂ、Ｃ、Ｄ・・・で示している。この図に示すように、Ａ／Ｄ変換回路１８は一定の周期でデジタル信号に変換することなく、デジタル信号に変換するタイミングの時間間隔をランダムに変化させる。 The A / D conversion circuit 18 does not convert the AC signal induced in the power receiving coil 11 at a constant sampling cycle into a digital signal. The A / D conversion circuit 18 converts a signal induced in the power receiving coil 11 at a random timing into a digital signal and outputs the digital signal to the microprocessor 19. FIG. 4 shows the timing at which the A / D conversion circuit 18 converts the AC signal induced in the power receiving coil 11 into a digital signal by A, B, C, D. As shown in this figure, the A / D conversion circuit 18 randomly changes the time interval of the timing for conversion to a digital signal without converting it to a digital signal at a constant period.
　Ａ／Ｄ変換回路１８は、受電コイル１１の交流信号をデジタル信号に変換するＡ／Ｄコンバータ（図示せず）と、このＡ／Ｄコンバータにトリガー信号を入力するトリガー回路（図示せず）とを備えている。トリガー回路は、Ａ／Ｄコンバータが入力されるアナログ信号をデジタル信号に変換するタイミングを特定する。トリガー回路は、時間間隔をランダムに変化させるトリガー信号をＡ／Ｄコンバータに入力する。Ａ／Ｄコンバータは、トリガー回路からトリガー信号が入力されるタイミングで、受電コイル１１から入力されるアナログ信号を、デジタル信号に変換してマイクロプロセッサ１９に出力する。 The A / D conversion circuit 18 includes an A / D converter (not shown) that converts an AC signal of the power receiving coil 11 into a digital signal, and a trigger circuit (not shown) that inputs a trigger signal to the A / D converter. It has. The trigger circuit specifies the timing at which the analog signal input to the A / D converter is converted into a digital signal. The trigger circuit inputs a trigger signal that randomly changes the time interval to the A / D converter. The A / D converter converts the analog signal input from the power receiving coil 11 into a digital signal at the timing when the trigger signal is input from the trigger circuit, and outputs the digital signal to the microprocessor 19.
　マイクロプロセッサ１９は、Ａ／Ｄ変換回路１８から入力されるデジタル信号を設定値に比較して、送電状態と非送電状態とを判定する。マイクロプロセッサ１９は、Ａ／Ｄコンバータが受電コイル１１の交流信号をデジタル信号に変換する毎に、デジタル信号に変換された信号が入力される。電池内蔵機器１が充電台４にセットされて、充電台４から電池内蔵機器１に電力を送電する状態において、磁気誘導作用で送電コイル４１から受電コイル１１に交流信号が誘導される。この状態で、Ａ／Ｄコンバータは、図４に示すタイミングで受電コイル１１に誘導される交流信号をデジタル信号に変換してマイクロプロセッサ１９に入力する。Ａ／Ｄコンバータが受電コイル１１の交流信号をデジタル信号に変換するタイミングはランダムに変化するので、受電コイル１１の交流信号の周期には同期しない。このため、Ａ／Ｄコンバータからマイクロプロセッサ１９に入力されるデジタル信号は、仮にいずれかのタイミングで入力される信号レベルが０レベルとなっても、受電コイル１１に交流信号が誘導されているかぎり、何れかのタイミングでは０レベルよりも大きくなる。したがって、マイクロプロセッサ１９は、入力されるデジタル信号のいずれかが設定値よりも大きいことを検出して、送電状態と判定できる。電池内蔵機器１から充電台４から外され、あるいは充電台４が送電を停止する状態になると、受電コイル１１には交流信号が誘導されなくなる。このため、この状態において、Ａ／Ｄコンバータからマイクロプロセッサ１９に出力されるデジタル信号は、常に０レベルとなる。したがって、マイクロプロセッサ１９は、入力されるデジタル信号が設定値よりも低い状態で、非送電状態と判定する。 The microprocessor 19 compares the digital signal input from the A / D conversion circuit 18 with the set value, and determines the power transmission state and the non-power transmission state. The microprocessor 19 receives a signal converted into a digital signal every time the A / D converter converts the AC signal of the power receiving coil 11 into a digital signal. In a state where the battery built-in device 1 is set on the charging stand 4 and power is transmitted from the charging stand 4 to the battery built-in device 1, an AC signal is induced from the power transmitting coil 41 to the power receiving coil 11 by magnetic induction. In this state, the A / D converter converts an AC signal induced in the power receiving coil 11 into a digital signal at a timing shown in FIG. Since the timing at which the A / D converter converts the AC signal of the power receiving coil 11 into a digital signal changes randomly, it does not synchronize with the period of the AC signal of the power receiving coil 11. For this reason, the digital signal input from the A / D converter to the microprocessor 19 is not limited to the level of the signal input at any timing as long as the AC signal is induced in the power receiving coil 11. At any timing, it becomes larger than the 0 level. Therefore, the microprocessor 19 can determine that any of the input digital signals is larger than the set value and determine the power transmission state. When the battery built-in device 1 is removed from the charging stand 4 or when the charging stand 4 stops power transmission, no AC signal is induced in the power receiving coil 11. Therefore, in this state, the digital signal output from the A / D converter to the microprocessor 19 is always 0 level. Therefore, the microprocessor 19 determines that the input digital signal is lower than the set value and the non-power transmission state.
　以上の交流検出回路１７は、図３に示すように、受電コイル１１の出力側にＡ／Ｄ変換回路１８の入力ライン２１を接続して、受電コイル１１に誘導される交流信号をＡ／Ｄ変換回路１８で検出している。ただ、交流検出回路は、整流後の電圧であって、半波整流や全波整流の脈流をＡ／Ｄ変換回路で検出して充電台の送電状態と非送電状態とを判定することもできる。この交流検出回路は、受電コイルに誘導される交流が整流された整流後の脈流をＡ／Ｄ変換回路で検出して、充電台の送電状態を判定する。この交流検出回路は、図３の鎖線で示すように、整流回路１３の出力側にＡ／Ｄ変換回路１８の入力ライン２２を接続して、整流後の脈流を検出する。このＡ／Ｄ変換回路１８も、整流後の脈流である交流信号を一定の周期でデジタル信号に変換することなく、ランダムなタイミングでデジタル信号に変換してマイクロプロセッサ１９に出力する。したがって、本明細書において、交流とは、サイン波の交流のみでなく、整流回路から出力されて時間的に変化する脈流を含む広い意味に使用する。 As shown in FIG. 3, the above AC detection circuit 17 connects the input line 21 of the A / D conversion circuit 18 to the output side of the power receiving coil 11, and converts the AC signal induced in the power receiving coil 11 into A / D. It is detected by the conversion circuit 18. However, the AC detection circuit is a voltage after rectification, and the pulsating current of half-wave rectification or full-wave rectification is detected by the A / D conversion circuit to determine the power transmission state and the non-power transmission state of the charging stand. it can. The AC detection circuit detects a rectified pulsating flow obtained by rectifying the AC induced in the power receiving coil by an A / D conversion circuit, and determines a power transmission state of the charging stand. As shown by a chain line in FIG. 3, this AC detection circuit detects the pulsating flow after rectification by connecting the input line 22 of the A / D conversion circuit 18 to the output side of the rectification circuit 13. The A / D conversion circuit 18 also converts the AC signal, which is a pulsating flow after rectification, into a digital signal at random timing without converting it into a digital signal at a constant period, and outputs it to the microprocessor 19. Therefore, in this specification, AC is used in a broad sense including not only AC of sine waves but also pulsating current that is output from the rectifier circuit and changes with time.
　電池内蔵機器１は、マイクロプロセッサ１９が送電状態と判定する状態で、内蔵電池１２から動作電力が供給される充電時負荷２０を備えている。この充電時負荷２０は、内蔵電池１２の充電状態をコントロールする制御回路１５を備え、また、内蔵電池１２の充電状態を示す表示器３０を備えている。この電池内蔵機器１は、マイクロプロセッサ１９が送電状態と判定する状態で、内蔵電池１２から充電時負荷２０に動作電力を供給し、非送電状態と判定する状態で、内蔵電池１２から充電時負荷２０への動作電力の供給を遮断する。したがって、非送電状態における内蔵電池１２の無駄な電力消費を防止できる。さらに、電池内蔵機器１は、マイクロプロセッサ１９が送電状態と判定する状態で、内蔵電池１２から充電時負荷２０に動作電力を供給すると共に、受電コイル１１に誘導される交流を整流した直流電力も充電時負荷２０に供給することができ、マイクロプロセッサ１９が非送電状態と判定する状態では、内蔵電池１２から充電時負荷２０に供給される動作電力を遮断することができる。 The battery built-in device 1 includes a charging load 20 to which operating power is supplied from the built-in battery 12 in a state in which the microprocessor 19 determines that the power is being transmitted. The charging load 20 includes a control circuit 15 that controls the charging state of the built-in battery 12, and a display 30 that indicates the charging state of the built-in battery 12. The battery built-in device 1 supplies operating power from the built-in battery 12 to the charging load 20 in a state where the microprocessor 19 determines that it is in a power transmission state. The supply of operating power to 20 is cut off. Therefore, useless power consumption of the internal battery 12 in the non-power transmission state can be prevented. Furthermore, the battery built-in device 1 supplies operating power from the built-in battery 12 to the load 20 during charging in a state in which the microprocessor 19 determines that the power is being transmitted, and also includes DC power obtained by rectifying alternating current induced in the power receiving coil 11. In the state where the microprocessor 19 can determine that it is in the non-power transmission state, the operating power supplied from the built-in battery 12 to the charging load 20 can be cut off.
　以上の電池内蔵機器１は、交流検出回路１７が送電状態と判定すると、制御回路１５を動作状態とし、スイッチング素子１４をオンとして、受電コイル１１に誘導される電力で内蔵電池１２を充電する。また、表示器３０により、内蔵電池１２が充電状態にあることをユーザーに表示する。図に示す表示器３０は、ＬＥＤで構成されるパイロットランプ３１で、このパイロットランプ３１を点灯して、内蔵電池１２が充電状態にあることを表示する。ただ、表示器は、液晶表示器等とすることもできる。さらに、電池内蔵機器１は、交流検出回路１７が非送電状態と判定すると、マイクロプロセッサ１９によりスイッチング素子１４をオフにし、又は、マイクロプロセッサ１９に送電電力が供給されないことより、これがシャットダウン状態となり、制御回路１５からの出力もなくなりスイッチング素子１４がオフとなる。そして、電池内蔵機器１は、制御回路１５をスリープモードに切り換えると共に、表示器３０であるパイロットランプ３１を消灯して、内蔵電池１２の無駄な電力消費を解消する。 When the AC detection circuit 17 determines that the above-described battery built-in device 1 is in the power transmission state, the control circuit 15 is turned on, the switching element 14 is turned on, and the built-in battery 12 is charged with the power induced in the power receiving coil 11. Further, the display 30 displays to the user that the internal battery 12 is in a charged state. The indicator 30 shown in the figure is a pilot lamp 31 composed of LEDs. The pilot lamp 31 is turned on to indicate that the built-in battery 12 is in a charged state. However, the display can be a liquid crystal display or the like. Furthermore, when the AC detection circuit 17 determines that the battery built-in device 1 is in the non-power transmission state, the switching element 14 is turned off by the microprocessor 19 or the transmission power is not supplied to the microprocessor 19, so that the shutdown state is established. There is no output from the control circuit 15 and the switching element 14 is turned off. Then, the battery built-in device 1 switches the control circuit 15 to the sleep mode and turns off the pilot lamp 31 that is the display device 30 to eliminate useless power consumption of the built-in battery 12.
　図３の電池内蔵機器１は携帯電話で、パック電池２と本体機器３とで構成している。この電池内蔵機器１は、パック電池２で送電状態と非送電状態とを判定して、その情報を本体機器３に伝送している。本体機器３は、送電状態ではパイロットランプ３１を点灯して、非送電状態ではパイロットランプ３１を消灯する。パイロットランプ３１を点滅するために、パイロットランプ３１であるＬＥＤと直列にＦＥＴスイッチ３２を接続して、このＦＥＴスイッチ３２を交流検出回路１７でオンオフに制御している。この図の電池内蔵機器１は、送電状態でパイロットランプ３１を点灯し、非送電状態でパイロットランプ３１を消灯しているが、パック電池２と本体機器３とからなる電池内蔵機器１は、本体機器３に送電状態と非送電状態とを示す信号を伝送して、本体機器３側で種々の制御、たとえば、送電状態では、外部から電力が供給されるので、携帯電話の画面等の液晶の表示を明るくし、あるいは液晶の表示を消すことなく連続して表示するなどの制御をすることも可能である。図３の電池内蔵機器１は、パック電池２と本体機器３とで構成しているが、本発明の電池内蔵機器１は、必ずしもパック電池２と本体機器３とで構成する必要はなく、パック電池２のみで構成することもできる。 The battery built-in device 1 in FIG. 3 is a mobile phone, and is composed of a battery pack 2 and a main device 3. The battery built-in device 1 determines the power transmission state and the non-power transmission state with the battery pack 2 and transmits the information to the main device 3. The main device 3 turns on the pilot lamp 31 in the power transmission state and turns off the pilot lamp 31 in the non-power transmission state. In order to blink the pilot lamp 31, an FET switch 32 is connected in series with the LED that is the pilot lamp 31, and the FET switch 32 is controlled to be turned on and off by the AC detection circuit 17. The battery built-in device 1 in this figure lights the pilot lamp 31 in the power transmission state and turns off the pilot lamp 31 in the non-power transmission state, but the battery built-in device 1 composed of the battery pack 2 and the main body device 3 A signal indicating the power transmission state and the non-power transmission state is transmitted to the device 3 and various controls are performed on the main device 3 side, for example, power is supplied from the outside in the power transmission state. It is also possible to control such that the display is brightened or continuously displayed without turning off the liquid crystal display. The battery built-in device 1 in FIG. 3 is composed of the battery pack 2 and the main body device 3, but the battery built-in device 1 of the present invention is not necessarily composed of the pack battery 2 and the main body device 3. The battery 2 can be used alone.
　　１…電池内蔵機器
　　２…パック電池
　　３…機器本体
　　４…充電台
　１１…受電コイル
　１２…内蔵電池
　１３…整流回路
　１４…スイッチング素子
　１５…制御回路
　１６…コンデンサー
　１７…交流検出回路
　１８…Ａ／Ｄ変換回路
　１９…マイクロプロセッサ
　２０…充電時負荷
　２１…入力ライン
　２２…入力ライン
　３０…表示器
　３１…パイロットランプ
　３２…ＦＥＴスイッチ
　４１…送電コイル
　４２…交流電源 DESCRIPTION OF SYMBOLS 1 ... Battery built-in apparatus 2 ... Pack battery 3 ... Equipment main body 4 ... Charging stand 11 ... Power receiving coil 12 ... Built-in battery 13 ... Rectifier circuit 14 ... Switching element 15 ... Control circuit 16 ... Capacitor 17 ... AC detection circuit 18 ... A / D Conversion circuit 19 ... Microprocessor 20 ... Load during charging 21 ... Input line 22 ... Input line 30 ... Display 31 ... Pilot lamp 32 ... FET switch 41 ... Power transmission coil 42 ... AC power supply

Claims (5)

  1. 　セットされる充電台(4)の送電コイル(41)に電磁結合されて、内蔵電池(12)に充電電力を供給して充電する受電コイル(11)を備える電池内蔵機器であって、
    　前記送電コイル(41)から出力される交流信号を検出する交流検出回路(17)を備え、この交流検出回路(17)が、前記受電コイル(11)に誘導される交流信号またはこの交流が整流された整流後の脈流を検出して、充電台(4)の送電状態を判定するようにしてなる電池内蔵機器であって、
    　前記交流検出回路(17)が、前記受電コイル(11)に誘導されるアナログ信号または整流後のアナログ信号をデジタル信号に変換するＡ／Ｄ変換回路(18)と、このＡ／Ｄ変換回路(18)の出力から充電台(4)の送電状態と非送電状態とを判定するマイクロプロセッサ(19)とを備え、
    　前記Ａ／Ｄ変換回路(18)が、ランダムなタイミングで受電コイル(11)に誘導される信号または整流後の信号をデジタル信号に変換してマイクロプロセッサ(19)に出力し、マイクロプロセッサ(19)がＡ／Ｄ変換回路(18)から入力される信号で、送電状態と非送電状態とを判定することを特徴とする電池内蔵機器。     A battery built-in device comprising a power receiving coil (11) that is electromagnetically coupled to a power transmission coil (41) of a charging base (4) to be set and supplies charging power to a built-in battery (12) for charging.
    An AC detection circuit (17) for detecting an AC signal output from the power transmission coil (41) is provided, and this AC detection circuit (17) rectifies the AC signal induced in the power reception coil (11) or the AC. Battery built-in device that detects the rectified pulsating flow and determines the power transmission state of the charging stand (4),
    The AC detection circuit (17) converts an analog signal induced in the power receiving coil (11) or a rectified analog signal into a digital signal, and an A / D conversion circuit ( A microprocessor (19) for determining the power transmission state and the non-power transmission state of the charging stand (4) from the output of 18),
    The A / D conversion circuit (18) converts a signal induced in the power receiving coil (11) or a rectified signal into a digital signal at random timing and outputs the digital signal to the microprocessor (19). ) Is a signal input from the A / D conversion circuit (18), and determines the power transmission state and the non-power transmission state.
  2. 　内蔵電池(12)から動作電力を供給して動作する充電時負荷(20)を有し、前記マイクロプロセッサ(19)が送電状態と判定する状態で充電時負荷(20)に動作電力が供給され、非送電状態と判定される状態で内蔵電池(12)から充電時負荷(20)への動作電力の供給が遮断されるようにしてなる請求項１に記載される電池内蔵機器。 It has a charging load (20) that operates by supplying operating power from the built-in battery (12), and operating power is supplied to the charging load (20) in a state that the microprocessor (19) determines that it is in a power transmission state. The battery built-in device according to claim 1, wherein supply of operating power from the built-in battery (12) to the load at the time of charging (20) is cut off in a state determined as a non-power transmission state.
  3. 　前記充電時負荷(20)に、内蔵電池(12)から動作電力が供給され、かつ受電コイル(11)に誘導される交流が整流された直流電力も供給され、
    　前記マイクロプロセッサ(19)が非送電状態と判定する状態で、前記内蔵電池(12)から前記充電時負荷(20)に供給される動作電力が遮断されるようにしてなる請求項２に記載される電池内蔵機器。     The charging load (20) is supplied with operating power from the built-in battery (12), and also supplied with DC power rectified by alternating current induced in the power receiving coil (11),
    The operating power supplied from the built-in battery (12) to the charging load (20) is cut off when the microprocessor (19) determines that it is in a non-power transmission state. Built-in battery equipment.
  4. 　前記充電時負荷(20)が、内蔵電池(12)の充電状態をコントロールする制御回路(15)を備える請求項２または３に記載される電池内蔵機器。 The battery built-in device according to claim 2 or 3, wherein the charging load (20) includes a control circuit (15) for controlling a charging state of the built-in battery (12).
  5. 　前記充電時負荷(20)が、内蔵電池(12)の充電状態を示す表示器(30)である請求項２ないし４のいずれかに記載される電池内蔵機器。 The battery built-in device according to any one of claims 2 to 4, wherein the charging load (20) is an indicator (30) indicating a charging state of the built-in battery (12).
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