JP2004304975A - Power supply method, system of electronic apparatus, and battery unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safety power supply method and system of an electronic apparatus in which a battery is not short-circuited even if a battery output is touched with a hand or output ends of the battery are short-circuited by a conductor, and to provide a battery unit. <P>SOLUTION: A digital camera 10 is provided with a radio tag 12 for delivering information and a battery pack 11 is provided with a radio tag reader 13 for acquiring information. When the radio tag reader 13 acquires information, the battery pack 11 turns an FET 120 on to supply power. When the radio tag reader 13 cannot acquire information, the battery pack 11 turns the FET 120 off to interrupt the output means of the battery pack 11 thus stopping power supply. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a power supply method, a power supply system, and a battery unit for an electronic device, and more particularly, to an electronic device control technique capable of protecting battery output in an electronic device using a battery.
[0002]
[Prior art]
In recent years, rechargeable secondary batteries such as nickel metal hydride batteries and lithium ion batteries have been widely used as power sources for various electronic devices. A secondary battery having a high energy density has a risk of explosion if the positive electrode and the negative electrode of the battery are short-circuited, and various protective devices are installed. The above-described protection circuit incorporates a dedicated IC for the protection circuit, and as a result, the manufacturing cost of the secondary battery is high.
[0003]
The portable device disclosed in Patent Document 1 houses a protection circuit board in a battery pack, and a lower case of the battery pack is provided with a terminal insertion hole corresponding to an electrode, and the device body corresponds to the terminal insertion hole. The structure of the battery pack and the structure of the device main body are disclosed, in which the spring terminal is provided, and when the battery pack is mounted on the device main body, the spring terminal and the electrode come into contact with each other through the insertion hole.
[0004]
In addition, the battery protection device including the positive temperature element disclosed in Patent Document 2 has at least one of overcharge, overdischarge, overcurrent, and temperature abnormality on the flat lead of the positive temperature element. Disclosed is a battery protection device equipped with at least one protection circuit that detects an abnormality and cuts off a current, and includes a dual safety device for the operation of a positive temperature element and the operation of a battery protection circuit element.
[0005]
[Patent Document 1]
JP-A-11-339974
[0006]
[Patent Document 2]
Japanese Patent Laid-Open No. 11-54110
[0007]
[Problems to be solved by the invention]
However, since the voltage for operating the electronic device must be output to the output of the secondary battery, there is a possibility that the output may be short-circuited by a conductive material when the user touches it. Is not secured.
[0008]
In the portable device disclosed in Patent Document 1, a protection IC or the like is not used as a battery protection device, and the electrode is protected by a lower case. However, since the insertion hole is provided in the lower cover corresponding to the electrode, depending on the size of the insertion hole and the thickness of the lower case, the electrode may be touched by hand and the electrode may be short-circuited. Moreover, what has conductivity may enter the insertion hole and short-circuit the electrode.
[0009]
In the battery protection device including the positive characteristic temperature element disclosed in Patent Document 2, an abnormal state of the battery such as overcurrent or overdischarge is detected, and a protection circuit is provided to protect the battery from the abnormal state. However, the output short-circuit protection during normal use is not illustrated, and in the protection function described above, the battery is not short-circuit protected because a voltage is output to the output terminal of the battery.
[0010]
The present invention has been made in view of such circumstances, and in an electronic device using a battery, even if the output terminal of the battery is short-circuited, the battery is not short-circuited, a power supply method for the electronic device, a power supply system, and a battery unit The purpose is to provide.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a power supply method for an electronic device using a battery unit, wherein information is transmitted from information providing means attached to the electronic device, and the information is provided in the battery unit. The electronic device is confirmed based on the information received by the information acquisition unit and acquired through the information acquisition unit. If the electronic device cannot be recognized, the power supply from the battery unit is cut off, while the electronic unit The output opening / closing unit of the battery unit is controlled to execute power supply from the battery unit when the device is recognized.
[0012]
According to the present invention, the electronic device is provided with information providing means for sending information, the battery unit is provided with information acquisition means for acquiring information, and when the information acquisition means acquires information, the battery unit supplies power. If the information acquisition means cannot acquire information, the battery unit shuts off the output means and stops power supply. Therefore, since the battery unit shuts off the output means when information from the electronic device cannot be acquired, it is safe because the battery is not short-circuited even if the output means is touched with a hand or shorted with a conductive material.
[0013]
The battery unit includes a control unit and a protection unit which are integrally formed on the battery, and are housed in a case or a unit molded with a molding material such as plastic.
[0014]
The battery includes a primary battery such as a dry battery and a secondary battery such as a lithium ion battery, a nickel cadmium battery, and a nickel metal hydride battery.
[0015]
An electronic device is a device that can use a secondary battery, including an electronic camera, a mobile phone, a notebook computer, a PDA, and the like.
[0016]
The information providing means may be built in the electronic device or attached at an arbitrary position on the surface. When it is built in the electronic device, it is easy to connect to the control means and each part in the electronic device.
[0017]
Similarly, the information acquisition means may be built in the battery unit or attached at an arbitrary position on the surface. If power is supplied from the battery unit, it should be built in.
[0018]
The information includes information on the electronic device including the model, serial number, and manufacturing date.
[0019]
The output opening / closing section includes a mechanism that electrically shuts off the output circuit and a mechanical mechanism such as a cover and a barrier covering the output means. The output opening / closing unit only needs to be able to open and close the output means of the secondary battery.
[0020]
In order to achieve the above object, a power supply system according to the present invention is a power supply system for an electronic device using a battery unit, and the electronic device includes a battery mounting unit to which the battery unit is detachably mounted. Information providing means for sending information to the battery unit, wherein the battery unit is configured to output and open / close means for switching between supply and cut-off of power to the electronic device, and information sent from the information providing means. It is characterized by comprising information acquisition means to be acquired and output control means for performing opening / closing control of the output opening / closing means on the basis of information acquired from the information acquisition means.
[0021]
According to the present invention, a battery unit can be loaded into an electronic device, and when the battery receives information from information providing means provided in the electronic device, the battery unit performs output opening / closing control based on the received information. The power supply to the electronic device can be controlled.
[0022]
In order to achieve the above object, a battery unit according to the present invention is a battery unit used in an electronic device, and is connected to the electronic device with a battery cell serving as a voltage and current supply source. A battery output terminal for supplying current and voltage to the battery device, output opening / closing means for switching between supply and interruption of power to the electronic device, information acquisition means for acquiring information transmitted from the electronic device, and the information acquisition Output control means for performing open / close control of the output open / close means based on the information acquired by the means.
[0023]
According to the present invention, the battery unit includes the information acquisition unit that receives information transmitted from the electronic device, and the output control unit that performs open / close control of the output of the battery based on the received information. The battery unit output can be opened and closed by information transmitted from the device.
[0024]
A battery unit according to an aspect of the present invention includes a main body loading detection unit that detects whether or not the battery unit is loaded in the electronic device main body, and the main body loading detection unit loads the battery unit into the electronic device. And power supply means for supplying power from the battery cell to the information acquisition means.
[0025]
According to this aspect, the battery unit is provided with the main body loading detection means for detecting whether or not the battery unit is loaded in the electronic device main body, and the power supply means from the battery cell to the information providing means. Is loaded into the main body of the electronic device, the information providing means becomes operable and information can be transmitted.
[0026]
The battery unit according to another aspect of the present invention is characterized in that the information acquisition means is means for receiving electronic device information sent from the information providing means in a non-contact signal transmission format.
[0027]
According to this aspect, electronic device information can be received in a non-contact signal transmission format, which is convenient because there is no need for connection by a cable.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of a power supply method, a power supply system, and a battery unit for an electronic device according to the present invention will be described with reference to the accompanying drawings.
[0029]
FIG. 1 is a schematic diagram of a power supply system according to an embodiment of the present invention.
[0030]
FIG. 1 shows a battery pack 11 in addition to the digital camera 10. A wireless tag 12 is provided on the right side of the digital camera 10 in FIG. 1, and a wireless tag reader 13 indicated by a broken line is built in the battery pack 11. The battery pack 11 is loaded into a battery holder 14 (shown by a broken line) of the digital camera 10.
[0031]
FIG. 2 is a perspective view of the digital camera 10. A power switch 16 and a release button 18 are provided on the top surface of the digital camera 10.
[0032]
On the back of the digital camera 10, a viewfinder 20, mode dial 22, right key 24, left key 26, up / down lever 28, display key 30, cancel / return key 32, menu / execute key 34, liquid crystal monitor (LCD monitor) 36 Is provided. Further, a strap 40, a power input terminal 42, and a wireless tag 12 are provided on the right side surface, and a memory slot (not shown in FIG. 2) for mounting a memory card is provided on the left side surface.
[0033]
Although not shown in FIG. 2, a photographing lens, a finder window, and a strobe light emitter are provided on the front surface of the digital camera 10.
[0034]
A battery cover 15 for the battery holder 14 is provided on the bottom surface of the digital camera 10, and the battery pack 11 is attached to the battery holder 14 from the bottom surface of the digital camera 10. A battery input terminal (positive electrode), a battery input terminal (negative electrode), and a battery detection terminal are provided in the battery holder. The battery input terminal (positive electrode, negative electrode) and battery detection terminal are not shown in FIG.
[0035]
The battery holder 14 and the battery cover 15 may be provided with a latch mechanism for fixing the battery pack 11 when the battery pack 11 is loaded.
[0036]
In the present embodiment, the wireless tag 12 is provided on the surface of the digital camera 10, but the installation position of the wireless tag 12 is not limited to the surface of the digital camera 10. A configuration in which the digital camera 10 is arranged inside the digital camera 10 is also possible.
[0037]
FIG. 3 is a perspective view of the battery pack 11. The battery pack 11 has a lithium ion secondary battery (battery cell), a control circuit, a safety circuit, and a wireless tag reader 13 inside, and is housed in one case. The battery pack 11 may have a surface covered with a molding material such as plastic or resin.
[0038]
The case and the molding material may be any material that has an insulating function and can protect the built-in battery cell, control circuit, safety circuit, and wireless tag reader 13.
[0039]
The wireless tag reader 13 is indicated by a broken line in FIG. 3, and the battery cell, the control circuit, and the safety circuit are not shown in FIG.
[0040]
A battery output (positive electrode) 46, a battery output (negative electrode) 48, and main body detection terminals 50 and 52 are provided on the surface of the battery pack 11.
[0041]
It is preferable that the battery pack 11 is disposed on the concave portion of the surface so that the battery outputs 46 and 48 are not accidentally touched when the battery pack 11 is held by hand. In FIG. 3, the main body detection terminals 50 and 52 are convex terminals, but if these are concave terminals, the main body detection terminals 50 and 52 may be touched by hand when the battery pack 11 is held by hand. There is no.
[0042]
FIG. 4 is a block diagram of an electronic apparatus control system according to the present invention.
[0043]
In the digital camera 10, when the power switch 16 is operated and the main power supply of the digital camera 10 is turned on, the power source 70 supplies power to each unit such as the imaging unit 60, the recording unit 62, the display unit 64, the operation unit 66, and the control unit 68. Is supplied to enable each part to operate.
[0044]
The imaging unit 60 includes an imaging unit 72, a signal processing unit 74, a strobe control unit 76, and a strobe. The imaging means 72 is composed of a photographic lens, a CCD, and the like, and converts an optical image of a subject into an electrical signal. The signal processing unit 74 performs predetermined signal processing on the image signal converted into an electrical signal by the imaging unit 72, and the strobe control unit 76 performs light emission control of the strobe 78.
[0045]
The recording unit 62 includes a storage unit (RAM) 80, a recording unit (ROM) 82, and a recording medium (memory card) 84. The RAM 80 temporarily stores image data to be subjected to signal processing and image data displayed on the display device, and the ROM 82 stores control programs and parameters for the digital camera 10. The memory card 84 is a recording medium for recording image data compressed into a predetermined format.
[0046]
The display unit 64 includes a display unit (LCD monitor) 36, a display unit control circuit 86, a backlight 88, and a backlight control unit 90. The LCD monitor 36 performs a through image display of a subject image, a preview display of a recorded image, a menu screen display, and the like, and a display means control circuit 86 performs display control of the LCD monitor 36. The backlight 88 functions as a backlight for the LCD monitor 36, and the backlight control means 90 controls the backlight 88.
[0047]
The operation unit 66 includes the power switch 16 and the release button 18 shown in FIG. 1, the mode dial 22, the right key 24, the operation buttons such as the up and down lever 28, the left key 26, and the operation means 92 including all the operation levers. Yes. When any of the operation means 92 is operated, an operation signal output from the operation means is sent to the control unit 68.
[0048]
The control unit 68 includes a CPU 94 and a peripheral circuit (not shown) of the CPU 94 and performs overall control of the digital camera 10.
[0049]
The control unit 68 receives an operation signal sent from the operation unit 66 and sends a control signal to each corresponding unit or executes a program recorded in the ROM 82.
[0050]
The power supply unit 70 includes a power supply circuit 96, a power supply control unit 98, a battery charging unit 100, and a battery voltage detection unit 104.
[0051]
The power circuit 96 is connected to the power input terminal 42, the battery terminal (positive electrode) 106, and the battery terminal (negative electrode) 108, and the AC adapter connected to the power input terminal 42 or the battery pack 11 connected to the battery terminals 106 and 108. Power is supplied from either one, and necessary power is generated for each unit in the digital camera 10.
[0052]
The power control means 98 controls the power supply circuit 96 according to the control of the CPU 94, and the battery charging means 100 supplies a charging current to the battery cell 102 built in the battery pack 11 according to the control of the CPU 94.
[0053]
The battery voltage detection means 104 monitors the output voltage of the battery pack 11 and informs the CPU 94 of information on voltage drop or voltage rise.
[0054]
The battery detection terminals 112 and 113 are connected to a reference potential (GND) in the digital camera 10. The battery detection terminals 112 and 113 are connected to the main body detection terminals 50 and 52 of the battery pack 11. The main body detection terminal of the battery pack 11 and the battery pack detection terminal of the digital camera 10 have a terminal structure that can be connected to each other.
[0055]
In the present embodiment, the main body detection terminals 50 and 52 have a convex shape as illustrated in FIG. 3, but are not limited thereto. The main body detection terminal may be concave and the battery detection terminals 112 and 113 may be convex.
[0056]
In the present embodiment, the main body detection terminals 50 and 52 and the battery detection terminals 112 and 113 are provided as two terminals, but these may be provided as one terminal or two or more terminals.
[0057]
It is preferable that the main body detection terminals 50 and 52 and the battery detection terminals 112 and 113 have a structure that does not cause poor connection due to vibration or impact when the digital camera 10 is carried. For example, if the main body detection terminals 50 and 52 are pushed from above in FIG. 3, they can be pushed into the battery pack 11, and when the push operation is released, the main body detection terminals 50 and 52 return to the positions before the push operation. The structure is
[0058]
When the battery pack 11 is attached to the battery holder 14 of the digital camera 10, the battery pack 11 contacts the battery detection terminals 112 and 113 and the main body detection terminals 50 and 52 are pushed into the battery pack 11. Configure to be mounted.
[0059]
The wireless tag 12 stores information about the digital camera 10 and sends information about the digital camera 10 (camera information) to the outside of the digital camera 10 by electromagnetic waves.
[0060]
The battery pack 11 has battery outputs 46 and 48 and main body detection terminals 50 and 52 on the surface, and has a battery cell 102, a transistor 114, a wireless tag reader 13, a diode 118, and an FET 120 inside.
[0061]
The positive electrode of the battery cell 102 is connected to the battery output (positive electrode) 46 and the emitter of the transistor 114 via the FET 120, and the negative electrode of the battery cell 102 is connected to the battery output (negative electrode) 48. The source of the FET 120 is connected to the positive electrode of the battery cell 102, and the drain of the FET 120 is connected to the battery output (positive electrode) of the battery pack 11.
[0062]
The base of the transistor 114 is connected to the main body detection terminal 50, and the collector of the transistor 114 is connected to the wireless tag reader 13.
[0063]
The wireless tag reader 13 is connected to the gate of the FET 120 through the diode 118. The diode 118 has an anode connected to the RFID tag reader 13 and a cathode connected to the gate of the FET 120.
[0064]
Note that the transistor 114 can be replaced with an FET, and the FET 120 can be replaced with a transistor. The transistor 114 may be a PNP type or an NPN type, and the FET 120 may be a P channel type or an N channel type. Both the transistor 114 and the FET 120 are used as switching elements in the power supply path, and it is preferable to use a low-loss device.
[0065]
Next, the wireless tag 12 will be described with reference to FIG. When the wireless tag 12 receives the induction wave transmitted from the wireless tag reader 13 by the wireless antenna 140, the power is excited by the induction wave and becomes operable.
[0066]
When the wireless tag 12 becomes operable, the control unit 142 continues to output a predetermined signal, and the electrical signal output from the control unit 142 is converted into a wireless signal by the wireless communication interface unit 144 and wirelessly transmitted via the wireless antenna 140. It is sent outside the tag 12. The wireless tag 12 continues to output a predetermined signal while receiving the induced radio wave.
[0067]
On the other hand, when the induced radio wave cannot be received, the wireless tag 12 stops operating and the wireless signal transmitted from the wireless antenna 140 is blocked.
[0068]
In this embodiment, although the form which excites the power supply of the wireless tag 12 with an induced radio wave was illustrated in this embodiment, the wireless tag 12 may be provided with a battery or may receive power supply from the digital camera 10.
[0069]
In addition, the wireless tag 12 continues to output a predetermined wireless signal when receiving the induced radio wave, and the wireless signal output is blocked when the induced radio wave cannot be received. However, the camera information is recorded in the recording unit 146 in advance. A configuration in which camera information converted into a wireless signal form is sent out of the wireless tag 12 from the wireless antenna 140 is also possible.
[0070]
The predetermined wireless signal transmitted by the wireless tag 12 includes an analog wave, a digital wave, and the like, and any form may be used.
[0071]
The camera information includes a model, a serial number, a manufacturing date, a control software version, and the like. Any information among the above-described information may be recorded in the recording unit 142.
[0072]
In the present embodiment, only one wireless tag 12 is provided, but a plurality of wireless tags 12 may be provided, and different camera information may be recorded in each of them.
[0073]
The wireless tag reader 13 will be described with reference to FIG. The wireless tag reader 13 is supplied with power from the battery cell 102 via the power input unit 150. The wireless tag reader 13 sends a guide radio wave from the wireless antenna 152 to excite the power supply to the wireless tag 12. On the other hand, when the wireless antenna 152 receives a wireless signal transmitted from the wireless tag 12, the wireless interface unit 154 converts the wireless signal into an electrical signal and sends it to the control unit 156. While a predetermined wireless signal is transmitted from the wireless tag 12, the control unit 156 continues to output a signal to the outside of the wireless tag reader 13 via the signal output unit 158, and when the signal from the wireless tag 12 is blocked, The control unit 156 stops the signal output, and the output to the outside of the wireless tag reader 13 is stopped.
[0074]
In the present embodiment, the power is supplied from the battery cell 102 to the wireless tag reader 13, but the wireless tag reader 13 may include a battery.
[0075]
The wireless tag reader 13 controls whether or not to output a signal from the signal output unit 158 depending on whether or not a wireless signal transmitted from the wireless tag 12 is received. Is not limited to this. A mode is also conceivable in which camera information is transmitted from a wireless tag, received camera information is temporarily stored, and camera information is output as necessary. In this case, a storage means (RAM) may be provided.
[0076]
Further, the wireless tag reader 13 can collate the camera information, and can open and close the output of the battery pack 11 according to the collation result. A configuration in which the battery pack 11 can be used only when the compatible models of the electronic device and the battery pack 11 match each other is possible.
[0077]
Although the mode in which the wireless tag reader 13 is built in the battery pack 11 is shown, the wireless tag reader 13 may be provided on the surface of the battery pack 11.
[0078]
Next, battery output opening / closing control of the battery pack 11 will be described. FIG. 7 is a flowchart showing the flow of battery output opening / closing control of the battery pack 11.
[0079]
When the battery pack 11 is loaded into the battery holder 14 of the main body of the digital camera 10 (step S12), the battery outputs 46 and 48 of the battery pack 11 and the battery terminals 106 and 108 of the digital camera 10 are connected.
[0080]
When the main body detection terminals 50 and 52 of the battery pack 11 and the battery detection terminals 112 and 113 of the digital camera 10 are connected and the battery pack 11 detects the main body of the digital camera 10 (step S14), the main body detection terminals 50 and 52 are The reference potential (GND) of the digital camera 10 and the battery pack 11 is set, and the transistor 114 is turned on.
[0081]
When the transistor 114 is turned on, power is supplied from the battery cell 102 to the wireless tag reader 13, the wireless tag reader 13 becomes operable (step S16), and an induced radio wave (illustrated by a broken line) is transmitted (step S18).
[0082]
When the wireless tag 12 cannot receive the induction wave transmitted from the wireless tag reader 13 (NO determination), the wireless tag 12 waits for reception of the induction wave, and when the wireless tag 12 receives the induction wave (YES determination), the wireless tag 12 Starts operation (step S22), and the wireless tag 12 transmits a predetermined wireless signal (shown by a broken line) (step S24). When the wireless tag 12 transmits a predetermined wireless signal, the wireless tag 12 waits for reception of an induced radio wave transmitted from the wireless tag reader 13 (step S20).
[0083]
The wireless tag reader 13 waits for reception of a wireless signal transmitted from the wireless tag 12 (step S26). If the wireless signal is not received (NO determination), the wireless tag reader 13 continues to wait for the wireless signal and receives the wireless signal ( If YES, the wireless tag reader 13 outputs an ON signal of the FET 120, and the FET 120 is turned on (step S28). When the FET 120 is turned on, the output voltage of the battery cell 102 is output to the battery outputs 46 and 48, the battery pack 11 outputs the battery output (step S30), and the process proceeds to step S32.
[0084]
In step S32, the main body detection is monitored. If the battery pack 11 is removed from the digital camera 10 and the main body cannot be detected (NO determination), the battery output of the battery pack 11 is shut off (step S34), and the process is terminated (step S32). S36).
[0085]
On the other hand, when the main body is detected in step S32 (YES determination), monitoring of the main body detection is continued.
[0086]
In the present embodiment, a digital camera is illustrated, but the scope of application of the present invention is not limited to a digital camera. The present invention can be applied to electronic devices that use secondary batteries, such as PDAs, personal computers, and mobile phones.
[0087]
In the electronic device control system, the electronic device, and the secondary battery configured as described above, the digital camera 10 includes the wireless tag 12, and the battery pack 11 includes the wireless tag reader 13. The battery pack 11 can acquire the camera information sent from the wireless tag 12 by the wireless tag reader 13. Further, since the battery pack 11 includes the main body detection terminals 50 and 52, it is possible to detect whether or not the battery pack 11 is loaded in the digital camera 10 main body (battery holder 14). Furthermore, when the battery pack 11 obtains camera information, the battery packs 11 can perform opening / closing control of the battery outputs 46 and 48. When the battery pack 11 is loaded in the main body of the digital camera 10, the battery outputs 46 and 48 output voltage and current. When the battery pack 11 is not loaded in the digital camera 10, the battery output 46 and 48 is cut off and the voltage is output. And stop the output of current. Accordingly, since the battery outputs 46 and 48 of the battery pack 11 do not output unless the battery pack 11 is loaded in the digital camera 10, the battery cell 102 is short-circuited even if the battery outputs 46 and 48 of the battery pack 11 are short-circuited. It is safe without being. Moreover, since the battery cell 102 does not short-circuit, the performance of the battery cell 102 does not deteriorate.
[0088]
Furthermore, since the main body detection terminals 50 and 52 do not become the reference potential (GND) when the user does not attach the battery pack 11 to the camera 10, Tr1 is not turned on, so that the leakage current of the battery cell 102 can be kept low. .
[0089]
【The invention's effect】
According to the present invention, the electronic device is provided with information providing means for sending information, the battery unit is provided with information acquiring means for acquiring information, and when the information acquiring means acquires information, the battery unit supplies power. If the information acquisition means cannot acquire information, the battery unit shuts off the output means and stops power supply. Therefore, since the battery unit shuts off the output means when information from the electronic device cannot be acquired, it is safe because the battery is not short-circuited even if the output means is touched with a hand or shorted with a conductive material.
[0090]
Furthermore, when the battery unit is provided with body loading detection means for detecting whether or not the battery unit is loaded in the electronic device body, when the battery unit is loaded in the electronic device body, the output of the battery unit is opened. If it is not loaded in the electronic device main body, it is possible to control the output of the battery unit to be cut off.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of a control system for a digital camera according to an embodiment of the present invention.
FIG. 2 is a perspective view of a digital camera according to an embodiment of the present invention.
FIG. 3 is a perspective view of a secondary battery according to an embodiment of the invention.
FIG. 4 is a block diagram of a digital camera control system according to an embodiment of the present invention.
FIG. 5 is a block diagram of a wireless tag
FIG. 6 is a block diagram of a wireless tag reader
FIG. 7 is a block diagram showing a control flow of the digital camera according to the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Digital camera, 11 ... Battery pack, 12 ... Wireless tag, 13 ... Wireless tag reader, 50 ... Body detection terminal, 102 ... Battery cell, 112, 113 ... Battery detection terminal, 114 ... Transistor, 120 ... FET

Claims (5)

A power supply method for an electronic device using a battery unit,
Send information from the information providing means attached to the electronic device,
The information is received by the information acquisition means provided in the battery unit,
Confirm the electronic device based on the information acquired through the information acquisition means,
If the electronic device cannot be recognized, the power supply from the battery unit is cut off, and when the electronic device is recognized, the output opening / closing unit of the battery unit is controlled to execute power supply from the battery unit. A power supply control method for an electronic device. A power supply system for an electronic device using a battery unit,
The electronic device includes a battery mounting portion on which the battery unit is detachably mounted, and information providing means for sending information to the battery unit,
The battery unit includes output opening / closing means for switching between power supply and shut-off to the electronic device;
Information acquisition means for acquiring information sent from the information providing means;
Output control means for performing opening / closing control of the output opening / closing means based on the information acquired from the information acquisition means;
A power supply system for electronic equipment, comprising: A battery unit used in electronic equipment,
A battery cell as a source of voltage and current;
A battery output terminal for supplying current and voltage to the battery device by being connected to the electronic device;
Output opening and closing means for switching between supply and interruption of power to the electronic device;
Information acquisition means for acquiring information transmitted from the electronic device;
Based on the information acquired by the information acquisition means, output control means for performing opening / closing control of the output opening / closing means,
A battery unit comprising: Body loading detection means for detecting whether or not the battery unit is loaded in the electronic device body;
Power supply means for supplying power from the battery cell to the information acquisition means when the body loading detection means detects loading of the battery unit into the electronic device;
The battery unit according to claim 3, further comprising: 5. The battery unit according to claim 3, wherein the information acquisition means is means for receiving electronic device information sent from the information providing means in a non-contact signal transmission format.

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