JP2006048681A - Electronic device and state display control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic device system for displaying a message peculiar to a fuel cell. <P>SOLUTION: The electronic device 1 is operated by electric power supply from a fuel cell unit 2 for generating power using methanol as the fuel. A power source management utility executed by a CPU 11 acquires status information of the fuel cell unit 2 stored in a register 161 of a power source controller 16 via a BIOS, and executes and controls, at an appropriate timing, the message display peculiar to the fuel cell unit 2 such as a message display of urging the fuel cell unit 2 to mount a fuel tank of removable cartridge type or a message display of urging it to change the fuel tank based on the acquired status information. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a system management technology for an electronic device using a fuel cell that generates power using methanol as a fuel as a battery.

  In recent years, various portable electronic devices that can be driven by a battery such as a personal digital assistant (PDA) or a digital camera have been developed and widely used.

  Recently, environmental problems have attracted a great deal of attention, and environmentally friendly battery development has been actively conducted. A direct methanol fuel cell (hereinafter referred to as DMFC) is well known as this type of battery.

This DMFC reacts with methanol and oxygen given as fuel to obtain electric energy by the chemical reaction, and has a structure in which two electrodes made of porous metal or carbon sandwich an electrolyte (for example, non-patent Reference 1). And since this DMFC does not generate harmful waste, it is strongly required to be applied to electronic devices as described above.
Hironosuke Ikeda, “All about Fuel Cells,” Nippon Jitsugyo Publishing Co., Ltd., August 20, 2001, p216-217

  By the way, in a notebook personal computer equipped with a conventional battery such as a lithium ion battery, when the remaining battery level is low, a message notifying that the battery is in a low battery state is displayed to prompt the user to charge. Is common. In some cases, after the current work environment is saved in a non-volatile memory device, the system power is automatically turned off.

  On the other hand, when the above-described DMFC is installed, when the remaining amount of fuel is low, it is necessary to display a message prompting the user to replace the cartridge storing methanol instead of a message prompting the user to charge. Further, when removing the cartridge, it is necessary to display a message prompting the user to install the cartridge.

  Furthermore, when an error peculiar to DMFC occurs, the error information must be displayed and appropriate processing must be performed as necessary.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide an electronic device and a state display control method that realize message display unique to a fuel cell.

  In order to achieve the above-described object, an electronic device according to the present invention includes a main body, a fuel cell that supplies electric power to the main body, a tank that stores fuel supplied to the fuel cell, and the tank. A fuel cell unit comprising: a sensor that detects a remaining amount of fuel; and a controller that transmits information indicating the remaining amount of fuel detected by the sensor to the main body; A control unit that acquires information indicating the remaining amount of fuel, and a display unit that displays the remaining amount of fuel based on the acquired information are provided.

  Further, the state display control method of the present invention includes a fuel cell that supplies electric power to an electronic device, a tank that stores fuel supplied to the fuel cell, a sensor that detects a remaining amount of fuel stored in the tank, A state display control method for the electronic device connected to the fuel cell unit, the controller including a controller for transmitting information indicating the remaining amount of fuel detected by the sensor to the electronic device, Information indicating the amount is acquired, and the remaining amount of fuel is displayed based on the acquired information.

  According to the present invention, it is possible to provide an electronic device and a state display control method that realizes message display unique to a fuel cell.

    Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram showing an external appearance of an electronic device system according to an embodiment of the present invention.

  As shown in FIG. 1, the electronic device system includes an electronic device 1 that is a notebook-type personal computer and a fuel cell unit 2 that is detachably attached to the back surface of the electronic device 1. The fuel cell unit 2 is a power supply device that supplies electric power for operating the electronic device 1 and includes a DMFC that reacts with methanol and oxygen supplied as fuel to obtain electric energy. Methanol, which is the fuel of this DMFC, is supplied from a cartridge-type fuel tank 2211 that is detachably stored in the fuel cell unit 2.

  FIG. 2 is a diagram illustrating an appearance of the electronic device system in a state where the lid portion of the electronic device 1 is opened.

  As shown in FIG. 2, the lid of the electronic device 1 is attached to the main body by a hinge mechanism so as to be freely opened and closed, and an LCD (Liquid Crystal Display) 141 is disposed on the inner wall surface thereof. On the other hand, a keyboard 151 for inputting characters, symbols and the like on the input screen displayed on the LCD 141 and a mouse cursor displayed for pointing an arbitrary place on the LCD 141 are moved to the main body, and A pointing device 152 for instructing selection is provided.

  FIG. 3 is a diagram illustrating a schematic configuration of the electronic apparatus 1.

  As shown in FIG. 3, in the electronic device 1, a CPU 11, a RAM 12, an HDD 13, a display controller 14, a keyboard controller 15, and a power controller 16 are connected to a system bus.

  The CPU 11 controls the operation of the entire electronic device 1 and executes various programs such as an operating system, a basic input / output system (BIOS), utility software, and application software stored in the RAM 12. A power management utility described later is one of a plurality of utility software.

  The RAM 12 is a recording medium serving as a main storage of the CPU 11 and stores various programs executed by the CPU 11 and various data used by these programs. On the other hand, the HDD 13 is a recording medium serving as auxiliary storage for the electronic device 1 and stores a large amount of various programs and various data.

  The display controller 14 is a device responsible for the output side of the user interface provided by the electronic device 1, and controls the display of screen data processed by the CPU 11 on the LCD 141. On the other hand, the keyboard controller 15 is a device responsible for the input side of the user interface provided by the electronic apparatus 1, and digitizes operations of the keyboard 151 and the pointing device 152 and transmits them to the CPU 11 via a built-in register.

  The power supply controller 16 distributes power for operation to each part of the electronic device 1, receives power supply from the fuel cell unit 2, and communicates with a microcomputer 21 described later of the fuel cell unit 2. It has a function. The power supply controller 16 has a built-in register 161 for storing status information indicating the state of the fuel cell unit 2, and the power management utility knows the state of the fuel cell unit 2 by referring to the status information. Be able to. The electronic device system of this embodiment is characterized in that the power management utility appropriately executes message display unique to the DMFC, which will be described later.

  FIG. 4 is a diagram showing a schematic configuration of the fuel cell unit 2.

  As shown in FIG. 4, the fuel cell unit 2 includes a microcomputer 21, a DMFC 22, an internal secondary battery 23, a charging circuit 24, an acceleration sensor 25, and an E2PROM 26.

  The microcomputer 21 controls the operation of the entire fuel cell unit 2 and executes communication with the power supply controller 16 of the electronic device 1. The microcomputer 21 also operates as a power supply controller in the fuel cell unit 2, and controls to supply the power of the internal secondary battery 23 to the DMFC 22 when the DMFC 22 is activated, so that the DMFC 22 can supply power, and When the internal secondary battery 23 is in a low battery state, control is performed to charge the internal secondary battery 23 with the power of the DMFC 22.

  The DMFC 22 includes a fuel tank slot 221, a fuel pump 222, a mixing tank 223, a liquid feed pump 224, a DMFC cell stack 225, and a blower pump 226.

  The fuel tank slot 221 is a slot for detachably storing a cartridge type fuel tank 2211, and includes an attachment / detachment sensor 2212 for detecting whether or not the fuel tank 2211 is attached. The methanol in the fuel tank 2211 accommodated in the fuel tank slot 221 is sent to the mixing tank 223 by the fuel pump 222 and diluted to a concentration of, for example, 10% by water returned from the DMFC cell stack 225.

  The mixing tank 223 stores the diluted methanol, and includes a liquid level sensor 2231 for detecting whether or not the liquid amount is within an appropriate range. Here, 15% to 90% of the capacity of the mixing tank 223 is assumed to be within the appropriate range, and the microcomputer 21 detects that the liquid level in the mixing tank 223 detected by the liquid level sensor 2231 continues that range for 2 seconds or more. When it comes off, it is determined that some abnormality has occurred. The mixing tank 223 has a function of evaporating unnecessary water out of the water returned from the DMFC cell stack 225 and discharging it out of the DMFC 22.

  The liquid feed pump 224 feeds methanol in the mixing tank 223 into the DMFC cell stack 225. In addition, the air taken in by the blower pump 226 is sent into the DMFC cell stack 225. Then, the methanol sent by the liquid feed pump 224 and the oxygen in the air sent by the blower pump 226 react in the DMFC cell stack 225 to generate electric power supplied to the electronic device 1. At this time, water is also generated, but this water is returned to the mixing tank 223 through the return channel.

  The DMFC cell stack 225 includes a temperature sensor 2251 for detecting whether or not the temperature in the stack is within an appropriate temperature range. Here, it is assumed that the optimum temperature in the DMFC cell stack 225 at the start of the DMFC 22 is 5 ° C. to 40 ° C., and the optimum temperature in the DMFC cell stack 225 during the operation of the DMFC 22 is 50 ° C. to 90 ° C. It is monitored whether the temperature in the stack is within a set temperature range at each time of startup and during operation.

  The internal secondary battery 23 is a lithium ion battery that can be repeatedly charged and discharged, and the fuel pump 222, the liquid feed pump 224, and the blower pump from when the DMFC 22 starts to operate until a predetermined amount of power is generated. It supplies power required by auxiliary mechanisms such as 225. In addition, the internal secondary battery 23 is charged by the charging circuit 24 that receives an instruction from the microcomputer 21 using the power generated by the DMFC 22.

  The acceleration sensor 25 is a sensor for detecting whether the inclination of the fuel cell unit 2 is within an allowable angle range. Here, the inclination is within 30 degrees, and the microcomputer 21 determines that it is necessary to warn the user when the inclination exceeds this range.

  The E2PROM 26 is a memory device for storing status information indicating the state of the fuel cell unit 2, and the microcomputer 21 is detected by various sensors such as a detachable sensor 2212, a liquid level sensor 2231, a temperature sensor 2251, and an acceleration sensor 25. Various states are recorded in the E2PROM 26 as status information. Further, the microcomputer 21 has a function of calculating the remaining amount of fuel in the fuel tank 2211 in accordance with the operating status of the DMFC 22, and records the calculated remaining amount in the E2PROM 26. Furthermore, the microcomputer 21 monitors whether or not the auxiliary mechanisms of the fuel pump 222, the liquid feed pump 224, and the blower pump 226 are operating normally. Record as.

  The area in which status information in the E2PROM 26 is stored has an open interface so that it can be referred to from the power supply controller 16 on the electronic device 1 side. The power supply controller 16 is a register containing status information read from the E2PROM26. 161.

  In the electronic device system of this embodiment having such a configuration, the power management utility operating under the operating system instructs the power controller 16 via the BIOS to read the status information stored in the E2PROM 26 every predetermined time. To do. Then, since the latest status information is stored in the register 161 of the power supply controller 16, the power management utility receives the response of the completion of reading from the power supply controller 16, and stores the status information of this register 161 in the BIOS. Get via.

  By referring to the status information, the power management utility can determine whether or not the fuel tank 2211 is attached. Therefore, when the fuel tank 2211 is not attached, the power management utility displays a message for prompting the attachment of the fuel tank 2211. FIG. 5 is a diagram showing an example of a message displayed by the power management utility.

  In this example, two application softwares, applications A and B, are operating, and the respective windows A and B are secured on the screen. In addition, an area called a task bar is secured at the bottom of the screen, and buttons for enabling easy calling by clicking the applications A and B are displayed in the task bar.

  Furthermore, an area called a task tray is secured at the right end of the task bar. In the task tray, for example, an icon for indicating the status of resident software that operates in the background is usually displayed, and hence it is also called an indicator area. In the electronic apparatus 1, the power management utility icon is displayed in the task tray.

  The power management utility whose icon is displayed in the task tray requests the operating system to display an ad balloon message “please install fuel tank”. Then, the operating system that has received this request displays this message on the icon of the power management utility in the form shown in FIG. Thereby, the message display peculiar to the fuel cell unit 2 such as the request for mounting the fuel tank is realized.

  Note that when the fuel tank 2211 is removed, sufficient methanol remains in the mixing tank 223 of the DMFC 22, so that it is possible to continue supplying power to the electronic device 1 for a while. is there. Therefore, in this electronic device system, if the operation is continued in this state, the microcomputer 21 of the fuel cell unit 2 is used to display a message when the fuel becomes empty, which will be described later, at an appropriate timing. However, when the removal / removal of the fuel tank 2211 is detected by the attachment / detachment sensor 2212, the remaining amount of fuel in the fuel tank 2211 stored in the E2PROM 26 is forcibly updated to an appropriate value specified in advance. This value can be calculated from the standard amount of liquid in the mixing tank 223 and the dilution of methanol during the operation of the DMFC 22 and the amount stored in the fuel tank 2211.

  Similarly, the power management utility can determine the remaining amount of fuel in the fuel tank 2211 from the status information. Therefore, when the remaining amount of fuel in the fuel tank 2211 is below a predetermined amount, the power management utility displays a message prompting replacement of the fuel tank 2211 as shown in FIG.

  In this case, the predetermined amount serving as a discrimination criterion is preferably set to 10% or less of the amount accommodated in the fuel tank 2211, but this value can be arbitrarily set by a power management utility. When performing this setting, the user clicks the icon of the power management utility displayed in the task tray with the pointing device 152. Then, the power management utility that receives this click displays an interface screen for various settings, and the user sets a predetermined amount as a discrimination criterion on the interface screen.

  As a result, it is possible to appropriately execute a message display specific to the fuel cell unit 2 such as a fuel tank replacement request.

  Next, the fuel amount in the mixing tank 223 is out of the proper range, the temperature in the DMFC cell stack 225 is out of the proper temperature range, the fuel pump 222, the liquid feed pump 224, or the blower pump 225 is stopped. An explanation will be given of the message display when the occurrence of an abnormality such as is empty based on the status information.

  When such an abnormality is detected, the power management utility requests the operating system to execute a shutdown process, for example, depending on the importance. When a serious abnormality requiring execution of the shutdown process occurs, the power management utility does not display the ad balloon as shown in FIGS. The operating system is requested to display a message window as shown in FIG.

  The message shown in FIG. 7 notifies the user that the system is to be shut down, and when the “Shutdown” button is clicked, the power management utility immediately requests the operating system to execute the shutdown process. In addition, even if the “Shutdown” button is not clicked, if no operation is performed for a predetermined time (that is, if the “Cancel” button is not clicked), the shutdown process is automatically executed in the operating system. Request.

  On the other hand, when a slight abnormality that does not need to be performed until the shutdown process is performed, for example, when the inclination of the fuel cell unit 2 is out of the allowable range, the power management utility displays an error code indicating the contents as shown in FIG. In addition, a message warning the occurrence of an abnormality is displayed in an ad balloon. Then, when some process in place of the shutdown process is necessary, the power management utility requests the operating system to execute the process.

  As described above, in the electronic device system, when an abnormality occurs in the fuel cell unit 2, a message indicating that fact is appropriately displayed, and a process for dealing with the abnormality is automatically executed.

  By the way, an operating system that executes resource management of a personal computer in an integrated manner can also execute battery remaining amount management. In general, the power supply controller 16 defines a state in which the remaining battery level is reduced to a level at which hardware operation cannot be guaranteed as 0% remaining battery level. When the operating system recognizes the remaining battery level of 0%, the operating system executes a shutdown process.

  In this electronic device system, the power management utility acquires the remaining amount of the fuel cell unit 2 from the power controller 16 and notifies the operating system. Therefore, a request for shutdown processing from the power management utility to the operating system when the fuel becomes empty is realized by a notification that the remaining amount of the fuel cell unit 2 is 0%.

  However, when the DMFC 22 is used as a power source, if the message display for prompting shutdown and the actual shutdown process are executed when the remaining battery level defined by the power supply controller 16 is triggered, there is a large possibility that they cannot be terminated normally. It cannot be said that the message prompting the shutdown is displayed at an appropriate timing. Therefore, in this electronic device system, in order to display the message prompting the shutdown at an appropriate timing, the power management utility uses the remaining amount of fuel in the fuel tank 2211 indicated by the status information acquired from the power controller 16 as it is. Instead of notifying, for example, an offset of 2% is added to notify the operating system of a value smaller than the actual value.

  In the E2PROM 26 in the fuel cell unit 2, the remaining amount of the mixing tank is stored as a value measured by the liquid level sensor 2231, and the microcomputer 21 subtracts 2% from the value stored in the E2PROM 26. Notify the power supply controller 16 of the electronic device 1. The power supply controller 16 notifies the CPU 11 of an interruption and notifies the remaining amount of fuel. As a result, the operating system is notified of a remaining amount less than the actual remaining amount, and even when the operating system recognizes 0%, the remaining amount of 2% remains in the mixing tank 223. Thereby, the shutdown process of the electronic device 1 can be executed with the remaining amount of 2%. Although the remaining amount is notified from the power controller 16, the operating system may periodically read the remaining amount information.

  FIG. 9 is a flowchart showing an operation procedure of message display control executed in the electronic device system.

  The power management utility periodically acquires status information stored in the E2PROM 26 of the fuel cell unit 2 via the power controller 16 and checks whether or not an abnormality has occurred in the fuel cell unit 2 (step A1). If an abnormality has occurred (YES in step A1), the power management utility checks whether this abnormality is of high importance requiring shutdown processing (step A2), and if shutdown processing is necessary (YES in step A2) After displaying a message prompting the shutdown process (step A3), the operating system is requested to execute the shutdown process (step A4).

  If the shutdown process is unnecessary (NO in step A2), a message is displayed to warn of the occurrence of an abnormality (step A5). If any countermeasure needs to be taken (YES in step A6), the process is executed. Requested to the operating system (step A7).

  On the other hand, if no abnormality has occurred (NO in step A1), the power management utility checks whether the cartridge type fuel tank 2211 has been removed (step A8). If it is removed (YES in step A8), the power management utility displays a message prompting the user to install the fuel tank 2211 (step A9). If not removed (NO in step A8), the power supply utility Subsequently, the management utility checks whether the remaining amount is less than a predetermined amount (step A10). If it is lower (YES in step A10), the power management utility displays a message for prompting replacement of the fuel tank 2211 (step A11).

  As described above, in this electronic device system, the message display specific to the fuel cell unit 2 is appropriately performed, and if any abnormality occurs, processing according to the abnormality is automatically executed. It will be.

  In the above-described embodiment, the example in which the power management utility operating on the electronic device 1 side periodically acquires the status information stored in the E2PROM 26 of the fuel cell unit 2 has been described. When the microcomputer 21 of the unit 2 updates the status information, the fact may be notified to the power supply controller 16 of the electronic device 1. In this case, the power controller 16 reads the latest status information from the E2PROM 26 and stores it in the built-in register 161, and transmits the status information update to the power management utility by an interrupt notification to the CPU 11. Then, the power management utility that knows the update of the status information acquires the latest status information stored in the register 161 of the power controller 16 via the BIOS.

  That is, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention in the implementation stage. Further, the embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, the problem described in the column of the problem to be solved by the invention can be solved, and the effect described in the column of the effect of the invention Can be obtained as an invention.

The figure which shows the external appearance of the electronic device system which concerns on embodiment of this invention The figure which shows the external appearance of the electronic device system in the state by which the cover part of the electronic device shown in FIG. 1 was opened. 1 is a diagram showing a schematic configuration of an electronic device of the embodiment The figure which shows schematic structure of the fuel cell unit of the embodiment The figure which shows the example of 1 display of the message which prompts mounting | wearing of the fuel tank which the power management utility which operate | moves with the electronic device system of the embodiment displays The figure which shows the example of a message which prompts replacement | exchange of the fuel tank which the power management utility which operate | moves with the electronic device system of the embodiment displays FIG. 10 is a diagram illustrating a display example of a message for notifying shutdown displayed by the power management utility operating in the electronic device system of the embodiment. FIG. 10 is a diagram showing a display example of a message for notifying occurrence of an abnormality displayed by the power management utility operating in the electronic device system of the embodiment. A flowchart showing an operation procedure of message display control executed in the electronic device system of the embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Electronic device, 2 ... Fuel cell unit, 11 ... CPU, 12 ... RAM, 13 ... HDD, 14 ... Display controller, 15 ... Keyboard controller, 16 ... Power supply controller, 21 ... Microcomputer, 22 ... DMFC, 23 ... Internal 2 Secondary battery, 24 ... charging circuit, 25 ... acceleration sensor, 26 ... E2PROM, 141 ... LCD, 151 ... keyboard, 152 ... pointing device, 161 ... register, 221 ... fuel tank slot, 222 ... fuel pump, 223 ... mixing tank, 224 ... Liquid feed pump, 225 ... DMFC cell stack, 226 ... Air blow pump, 2221 ... Fuel tank, 2212 ... Removable sensor, 2231 ... Liquid level sensor, 2251 ... Temperature sensor.

Claims (16)

The body,
A fuel cell for supplying power to the main body; a tank for storing fuel to be supplied to the fuel cell; a sensor for detecting a remaining amount of fuel stored in the tank; and a remaining amount of fuel detected by the sensor. A fuel cell unit comprising: a controller that transmits information indicating the amount to the main body;
A control unit that is provided in the main body and acquires information indicating a remaining amount of the fuel from the controller;
A display unit for displaying the remaining amount of fuel based on the acquired information;
An electronic apparatus comprising: 2. The display unit displays information for prompting replacement of the tank or information indicating that the fuel amount has fallen below the predetermined value when the remaining amount of the fuel has fallen below a predetermined value. Electronic equipment. The body,
A fuel cell for supplying electric power to the main body, a mounting part capable of mounting a tank for storing fuel supplied to the fuel cell, a sensor for detecting whether or not the tank is mounted in the mounting part; A fuel cell unit comprising a controller that transmits information indicating the mounting state of the tank detected by the sensor to the main body;
A control unit that is provided in the main body and acquires information indicating a mounting state of the tank from the controller;
A display unit for displaying a mounting state of the tank based on the acquired information;
An electronic apparatus comprising: In the case where the acquired information is information indicating that the tank is not mounted on the mounting unit, the display unit displays information indicating that the tank is not mounted or information indicating that the tank is not mounted. The electronic device according to claim 3, wherein the electronic device is displayed. The body,
A fuel cell unit comprising a fuel cell capable of supplying electric power to the main body, and a detachable fuel cell unit for storing fuel in the fuel cell;
A controller that is provided in the fuel cell unit and transmits information indicating an abnormality occurring in the fuel cell unit to the main body;
A control unit that is provided in the main body and acquires information indicating an abnormality occurring in the fuel cell unit from the controller;
When an abnormality occurs in the fuel cell unit, based on the acquired information, a display unit that displays information on the occurrence of an abnormality in the fuel cell unit;
An electronic apparatus comprising: The electronic apparatus according to claim 5, further comprising an abnormality processing unit that executes processing corresponding to the abnormality. 6. The electronic apparatus according to claim 5, wherein, when a predetermined abnormality occurs in the fuel cell unit, the display unit displays information notifying that the main body is to be shut down. When a predetermined abnormality occurs in the fuel cell unit, the abnormality processing unit is configured to remove the main body after a predetermined time has elapsed from the display of information indicating that the display unit shuts down the main body. 6. The electronic apparatus according to claim 5, wherein the electronic apparatus is shut down. A fuel cell for supplying electric power to an electronic device; a tank for storing fuel supplied to the fuel cell; a sensor for detecting a remaining amount of fuel stored in the tank; and a remaining amount of fuel detected by the sensor A state display control method for the electronic device connected to a fuel cell unit comprising a controller for transmitting information to the electronic device,
Obtaining information indicating the remaining amount of fuel from the controller;
A state display control method, comprising: displaying a remaining amount of fuel based on the acquired information. 10. The electronic device according to claim 9, wherein when the remaining amount of fuel falls below a predetermined value, information prompting replacement of the tank or information indicating that the fuel level has fallen below the predetermined value is displayed. A fuel cell for supplying electric power to an electronic device, a mounting part for mounting a tank for storing fuel supplied to the fuel cell, a sensor for detecting whether the tank is mounted in the mounting part, and the sensor A state display control method for the electronic device connected to a fuel cell unit comprising a controller for transmitting information indicating the detected mounting state of the tank to the electronic device;
Obtaining information indicating the mounting state of the tank from the controller,
A state display control method for displaying a mounting state of the tank based on the acquired information. When the acquired information is information indicating that the tank is not mounted on the mounting portion, information for prompting the mounting of the tank or information indicating that the tank is not mounted is displayed. The state display control method according to claim 11. A state of the electronic device connected to a fuel cell unit comprising a fuel cell for supplying power to the electronic device, a tank for storing fuel of the fuel cell, and a controller for transmitting information indicating an abnormality occurring to the electronic device A display control method,
Obtaining information indicating an abnormality occurring in the fuel cell unit from the controller;
A state display control method, wherein when an abnormality occurs in the fuel cell unit, information on the occurrence of the abnormality in the fuel cell unit is displayed based on the acquired information. The state display control method according to claim 13, wherein a process corresponding to the abnormality is executed based on the acquired information. 15. The state display control method according to claim 14, wherein when a predetermined abnormality occurs in the fuel cell unit, information notifying that the electronic device is to be shut down is displayed. 15. The state according to claim 14, wherein, when a predetermined abnormality occurs in the fuel cell unit, the electronic device is shut down after a predetermined time has elapsed from the display of information notifying that the electronic device is to be shut down. Display control method.

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