CN102024964B - Electronic equipment - Google Patents
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- CN102024964B CN102024964B CN201010530745.0A CN201010530745A CN102024964B CN 102024964 B CN102024964 B CN 102024964B CN 201010530745 A CN201010530745 A CN 201010530745A CN 102024964 B CN102024964 B CN 102024964B
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Classifications
-
- 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
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Fuel Cell (AREA)
Abstract
The invention provides an electronic equipment. Upon determining the temperature of and pressure in a flow path connecting between a fuel cell and a fuel storage container for supplying fuel to the fuel cell in order to detect a residual capacity of a fuel cell battery, the temperature is determined from those measured in electronic equipment connected to the fuel cell battery. Therefore, there can be provided a residual capacity detection method and a residual capacity detection system for a fuel cell battery, which can give a user accurate information on battery residual capacity even if there is no temperature detection part in a fuel cell system. The present invention can also be understood as a residual capacity detection system for a fuel cell battery.
Description
The present application is filed in article 42 of the rules for implementing patent laws, which is a divisional application of the invention patent application "method for detecting remaining amount of fuel cell and device for detecting remaining amount of fuel cell" filed on the application date of 2007, month 10 and 18 and application number of 200710182364.6.
Technical Field
The present invention relates to an electronic device having a fuel cell using hydrogen or the like as a fuel.
Background
Fuel cells such as hydrogen and methanol are considered to be used as fuel cells for various information processing devices because of their light weight and convenience. Examples of such information processing devices include electronic devices having a communication function, such as digital cameras, video cameras, notebook Personal computers, cellular phones, Personal Digital Assistants (PDAs), audio players, and capsule medical devices.
As for a hydrogen storage container to which a hydrogen storage material is applied and a fuel cell system using the hydrogen storage container, a fuel cell system used in a portable device is particularly proposed.
For example, japanese patent application laid-open No. 2004-362786 describes a fuel cell system for a portable device in which a gas discharge mechanism having the same structure as a pressure adjustment mechanism is constituted by a hydrogen discharge valve using a piezoelectric body and a flow path. This system has a primary pressure detection mechanism that detects the hydrogen pressure in the hydrogen storage alloy (hydrogen absorbing alloy) container, and uses a pressure control circuit to operate the hydrogen release valve of the piezoelectric body. When the hydrogen pressure in the hydrogen storage container and the temperature of the hydrogen storage container are not less than predetermined values, a voltage is applied from the pressure control circuit to the piezoelectric hydrogen discharge valve to discharge the hydrogen gas to the outside. As a result, the hydrogen gas can be safely discharged to the outside.
Further, japanese patent application laid-open No. 2006-99984 discloses an electronic apparatus having a case portion that accommodates a plurality of hydrogen storage alloys having different hydrogen discharge characteristics. The box body part comprises a hydrogen storage alloy, a pressure sensor, an output circuit and a temperature sensor. Such an electronic device uses a fuel cell having: a power generation unit for generating power using the hydrogen discharged from the tank unit; a pressure detection unit that detects a pressure of hydrogen supplied to the power generation unit; and a remaining amount detection unit for detecting a remaining amount of hydrogen from the hydrogen discharge characteristics of the plurality of hydrogen storage alloys by the pressure detection unit.
Further, japanese patent application laid-open No. 2004-: a temperature sensor for measuring the temperature of the hydrogen storage alloy in a hydrogen storage alloy tank containing the hydrogen storage alloy for the fuel cell; a hydrogen flow path for supplying hydrogen from the hydrogen storage alloy tank to the fuel cell; and a pressure sensor for measuring the hydrogen pressure in the hydrogen flow path. This document also discloses a measurement method for determining the hydrogen storage amount of a hydrogen storage alloy using a function which is experimentally determined in advance and which shows the relationship between the hydrogen pressure and the remaining amount of hydrogen at each temperature, and a graph showing the function.
In "fuel control micro valve for portable fuel cell" under the report of the field of electrical engineering (vol.53no. 4), there is disclosed a technique in which a fuel control valve for a portable fuel cell is a micro valve that is normally closed (normally closed) by an electrostatic driving method using MEMS (micro Electro Mechanical System) technology, and consumes power only during power generation.
Disclosure of Invention
In order to detect the remaining amount, the electronic device of the present invention determines the temperature of a flow path connecting a fuel cell and a fuel storage container for supplying fuel to the fuel cell, based on the temperature measured by the electronic device connected to the fuel cell, when determining the temperature and pressure of the flow path.
The electronic device of the present invention can be expressed as follows, for example. An electronic apparatus, having: a fuel cell unit connected to the electronic device; a hydrogen storage alloy container for supplying fuel to the fuel cell unit; a flow path connected between the hydrogen storage alloy container and the fuel cell; a pressure detector for detecting a pressure in the flow path; a CPU calculation processing part for calculating the residual amount of hydrogen fuel in the hydrogen storage alloy container; a temperature sensor provided in the vicinity of the image pickup device and/or the vicinity of the recording medium of the electronic apparatus and detecting a temperature; wherein, the temperature near the image pickup element or the recording medium of the electronic device is detected, the temperature near the image pickup element or the recording medium is selected, when the temperature near the image pickup element or the recording medium is less than a predetermined temperature, the temperature difference between the temperature of the electronic device and the temperature of the flow path is read from pre-stored reference data, the temperature of the flow path is obtained from the temperature difference, the remaining amount of the fuel cell is obtained from the temperature of the flow path and the pressure of the flow path, and when the temperature near the image pickup element or the recording medium is greater than or equal to the predetermined temperature, an error flag is set, and then an error display is performed.
The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings showing preferred embodiments thereof by way of example and the following description thereof.
Drawings
Fig. 1A is a sectional view showing the structure of a fuel cell system according to embodiment 1 of the present invention.
Fig. 1B is a structural view showing a configuration example of the terminal substrates 30a and 30B in fig. 1A.
Fig. 2 is a sectional view showing a specific structure of a part of the pressure adjustment mechanism of the fuel cell system 10 shown in fig. 1A.
Fig. 3 is an external perspective view showing an example of joining and assembling the fuel cell unit 20 and the hydrogen storage alloy container housing 18.
Fig. 4A is a sectional view showing the structure of the fuel cell device, and is a sectional view of the vicinity of one end.
Fig. 4B is a sectional view showing the structure of the fuel cell device, and is a sectional view of the vicinity of the other end.
Fig. 5 is a block diagram illustrating a combination of a fuel cell system, a secondary battery, and a remaining amount display of an electronic device incorporating a CPU.
Fig. 6 is a block diagram showing the configuration of a CPU and its peripheral parts for explaining the remaining amount detection and the battery abnormality detection of the fuel cell.
Fig. 7A is a flowchart illustrating the operation of a main routine of the remaining amount detection of the fuel cell system of the electronic device.
Fig. 7B is a flowchart illustrating the operation of the main routine of the remaining amount detection of the fuel cell system of the electronic device.
Fig. 7C is a flowchart illustrating a processing operation of a subroutine "remaining battery level check" of the fuel cell system according to embodiment 1 of the present invention.
Fig. 8 is a diagram illustrating a voltage applied to the pressure regulating valve from the pressure sensor for detection on the silicon substrate.
Fig. 9 is a pressure-margin graph for a plurality of temperature characteristics.
Fig. 10A and 10B are block configuration diagrams of two fuel cell systems according to embodiment 1 of the present invention.
Fig. 11A and 11B are tables showing data items stored in the ROM.
Fig. 12 is a diagram showing screen display examples (a) to (d) of the fuel cell selected by the user's specification.
Fig. 13A is a perspective view showing the structure of a fuel cell device according to embodiment 2 of the present invention, and showing the 2 nd metal plate side.
Fig. 13B is a perspective view showing the structure of a fuel cell device according to embodiment 2 of the present invention, showing the 1 st metal plate side.
Fig. 14 is a block diagram showing the configuration of a fuel cell system according to embodiment 3 of the present invention.
Description of reference numerals:
11: a 1 st glass substrate; 12: a2 nd glass substrate; 13: a 1 st silicon substrate; 14: a2 nd silicon substrate; 16: PRO-HAIC; 17: a hydrogen storage alloy container; 18: a hydrogen storage alloy container frame; 19: a heat insulating member; 20: a fuel cell unit device; 21: a piping path A; 22: a piping path B; 23: a holding plate; 24: a hydrogen supply port; 25: an air intake; 26: a heat sink; 28: a bonding wire; 28 a: a bonding wire group; 29 a: a plurality of pin terminals; 30a, 30 b: a substrate for terminals; 29. 33: a pin terminal; 35: a tilt adjusting member; 36: an O-ring (sealing member); 37: a 3 rd silicon substrate; 38: DRV-HAIC; 40: a sine wave voltage circuit; 42: a protective film; 43: a diaphragm; 44: a hollow portion; 45. 46: a driving electrode plate; 47: a relay terminal substrate; 51: a vent (air intake); 52a, 52b, 52 c: a protrusion portion; 55: an air flow inlet; 58: a hydrogen discharge port; 54: a cooling fin; 61: a polymer solid electrolyte membrane; 62: an anode side electrode plate; 63: a cathode-side electrode plate; 64: 1 st metal plate (stainless steel); 65: a hydrogen injection port; 66: a2 nd metal plate (magnetic member); 67a, 67 b: an air intake; 68: spirally grooving; 69: a pressing part; 71a, 71 b: a thin film magnet layer; 72a, 72 b: positioning pins; 73a, 73 b: a sealing member; 75a, 75 b: a bushing; 76: an R surface; 77: a hydrogen flow path groove; 150: a stainless steel component; 151: a 1 st metal plate; 152: a Ni plate; 153: a hydrogen flow path; 154 piping path B; 156 a: a thin film magnet layer; 157 a: positioning pins; 161: 2 nd metal member (stainless steel member); 162: an opening part; 160: an upper layer cover; 163: a vent; 165: a step portion; 166 side surface parts; 167: a back portion; 168: magnetic components (stainless steel 304 components); 169: a side surface portion; 171: the 1 st protrusion; 172: the 2 nd protrusion; 173: riveting; 175a, 175 b: and (7) positioning the holes.
Detailed Description
Embodiments of the present invention will be described below with reference to the drawings.
(embodiment 1)
Fig. 1A is a sectional view showing the structure of a fuel cell system according to embodiment 1 of the present invention.
In fig. 1A, the fuel cell system 10 includes a hydrogen storage alloy container housing 18, and a fuel cell unit 20 mounted on the hydrogen storage alloy container housing 18. The hydrogen storage alloy container 17, the 1 st glass substrate 11 and the 2 nd glass substrate 12 are mounted on the hydrogen storage alloy container frame 18. The 1 st glass substrate 11 and the 2 nd glass substrate 12 are interposed between the fuel cell device 20 and the hydrogen storage alloy container 17.
A 1 st silicon substrate 13 and a 3 rd silicon substrate 37 are disposed on the 1 st glass substrate 11. The 3 rd silicon substrate 37 is embedded with an IC chip (DRV-HAIC) 16 for a driver circuit and an amplitude amplifier circuit. On the other hand, a2 nd silicon substrate 14 is disposed on the 1 st silicon substrate 13. The 2 nd silicon substrate 14 is provided with: a piping path A21 extending through the 1 st glass substrate 11 to the hydrogen storage alloy container 17; extends to the pipe path B22 of the fuel cell device 20 through the 2 nd glass substrate 12 and the heat insulating member 19. The piping path a21 and the piping path B22 are an inlet and an outlet of a hydrogen flow path (fine fluid flow path) for supplying hydrogen from the hydrogen storage alloy container 17 to the fuel cell device 20.
In this way, the upper layer (pipe path B22) and the lower layer (pipe path a 21) of the hydrogen flow path for supplying hydrogen to the fuel cell unit 20 are provided in the hydrogen storage alloy container housing 18. In the pipe path B22, a pressure adjustment mechanism having a function of adjusting the hydrogen pressure at the time of supplying hydrogen to the equilibrium pressure of the hydrogen storage alloy or less is formed on the 2 nd silicon substrate 14. The pressure adjusting mechanism is, for example, an opening/closing valve, a pressure sensor for detection, a safety valve, and a pressure adjusting valve on the 2 nd silicon substrates 14 and 183 shown in fig. 10 and 14. The pipe path a21 is connected to the 1 st silicon substrate 13 formed on the 1 st glass substrate 11. A through hole is formed in the lower portion of the 3 rd silicon substrate 37, and a lead wire such as an opening/closing valve, a drive wire of a safety valve, and a signal wire of a pressure sensor for detection is passed through the through hole.
Further, if a thin pipe (capillary tube) is disposed between the hydrogen storage alloy container housing 18 and the opening/closing valve, the pressure loss during the passage of hydrogen can be utilized to reduce the pressure during the driving of the pressure regulating valve, and the load on the pressure regulating mechanism can also be reduced.
In this way, the hydrogen storage alloy container housing 18 and the fuel cell unit 20 are combined to form the fuel cell system 10 in which the path from the hydrogen storage alloy container 17 to the fuel cell unit 20 is integrated.
The 2 nd glass substrate 12 is bonded to a synthetic resin holding plate 27 in parallel with the 1 st glass substrate 11, so as to prevent electrostatic damage to the fluid elements of the pressure sensors and the pressure control valves arranged in the space between the 2 nd glass substrate 12 and the 1 st glass substrate 11. The synthetic resin holding plate 27 is laminated and joined between the hydrogen storage alloy container frame 18 on the fuel cell device 20 side and the hydrogen storage alloy container frame 18 on the hydrogen storage alloy container 17 side, which are cut off, thereby forming a heat insulating structure between the fuel cell device 20 side and the hydrogen storage alloy container frame 18 that supports the hydrogen storage alloy container 17. That is, by blocking the heat transfer from the fuel cell device 20 to the hydrogen storage alloy container 17, the rapid temperature rise of the fuel cell container 17 can be suppressed.
The fuel cell device 20 is composed of an anode-side electrode plate, a cathode-side electrode plate, and a polymer solid electrolyte membrane. The fuel cell unit 20 uses hydrogen as fuel to provide power. The heat insulating member 19 located below the fuel cell device 20 has conductive powder as a core material, and the core material is sealed in a bag made of a nonwoven fabric and covered with a case. As another example, instead of the heat insulating member 19 and the 2 nd glass member 12, they may be replaced with a sheet (sheet) member of a latent heat storage member of a heat storage device that stores/retains heat at a certain temperature, which is opposed to the fuel cell unit 20.
As the latent heat storage member (for example, 58 ℃ C.) which stores exothermic heat, there are exemplified wax of an organic material and sodium acetate hydrate of an inorganic material.
The organic substance is a microcapsule containing a latent heat storage member and highly heat conductive carbon fibers filled therein and having a synthetic resin coating film. A sheet member in which the microcapsules are joined is formed by interposing a highly thermally conductive adhesive on the surface of the synthetic resin as the base sheet material and joining a large number of the microcapsules. The thin plate member may be fixed to the 2 nd glass substrate or directly to the lower surface of the fuel cell device by a highly heat conductive adhesive member.
When the temperature of the outer surface of the fuel cell unit 20 rises to about 48 ℃, the time for the temperature rise of about 48 ℃ or more is prolonged in order to temporarily store and retain heat when the heat storage member 43 is melted by a phase change, and the temperature rise of the hydrogen storage alloy container 17 due to heating can be shut off.
In this way, heat is slowly transferred by latent heat temporarily stored in the latent heat storage member. When the heat insulating member 19 made of the thin plate member of the latent heat storage member is in close contact with the 2 nd glass substrate 12, the latent heat temporarily stored in the space portion is gradually released from the thin plate member of the latent heat storage member, and air cooling is performed. Further, if the glass substrate 12 is replaced with a heat radiating member such as an aluminum member having high thermal conductivity, the latent heat temporarily stored can be gradually transferred from the aluminum member to the hydrogen storage alloy container 17.
The 2 nd glass substrate 12 is in close contact with the fuel cell device 20 through a heat insulating member 19 which is a vacuum heat insulating member covered with an outer package. In this way, by interposing the heat insulating member 19 between the fuel cell 20 and the 2 nd glass substrate 12, heat generated from the fuel cell device 20 can be cut off. In order to make the thickness of the heat insulating member 19 several mm when using this vacuum heat insulating member, it is preferable to directly bond the heat insulating member 19 to the hydrogen storage alloy container casing 18 without using the 2 nd glass substrate 12 for supporting the heat insulating member 19.
Further, a hydrogen supply port 24 is provided in the hydrogen storage alloy container 17 and the hydrogen storage alloy container housing 18. The hydrogen supply port 24 is detachable and has a mechanism for opening a valve by connecting a hydrogen supply cylinder (bomb). Further, by connecting a hydrogen supply cylinder to the hydrogen supply port 24 and injecting hydrogen, hydrogen can be supplied to and stored in the hydrogen storage alloy container 17. Examples of the hydrogen supply cylinder include a hydrogen generator that generates hydrogen by the action of methanol, ethanol, dimethyl ether, or the like with a porous substance.
The hydrogen storage alloy container 17 is in the shape of a rectangular parallelepiped having a short length in the thickness direction. A fuel cell unit 20 is disposed above the hydrogen storage alloy container 17. As a material constituting the rectangular hydrogen storage alloy container frame 18, a metal such as aluminum or stainless steel that can withstand the pressure of the hydrogen storage alloy container 17 can be used. When the material of the outer surface of the hydrogen absorbing alloy container casing 18 is aluminum, a plurality of cooling fins 26 having an uneven shape in a direction perpendicular to the paper surface are formed by processing a plurality of grooves or the like.
An air inlet 25 is interposed between the 1 st glass substrate 11 and the 2 nd glass substrate 12. The air inlet 25 is formed to have an opening in a groove portion of the heat sink 26 on the surface of the hydrogen storage alloy container housing 18 to which the terminal substrates 30a and 30b are not attached (see fig. 3). With this arrangement, when the fuel cell system 10 is inserted into a device such as a mobile phone, air intake is not hindered by a leaf spring member (not shown) that presses a terminal of the device against a terminal of the terminal substrate 30 a.
The pin terminals 29 and 33 are joined to the terminal boards 30a and 30 b. The pin terminal 33 is used for the output voltage of the fuel cell unit 20. The pin terminal 29, DRV-HAIC 16, and the relay terminal substrate 47 are connected by bonding wires 28.
As shown in fig. 1B, the terminal substrate 30a is provided with terminals of signal lines 31a to 31h for transmitting signals from the pressure sensor for detection and the pressure regulating valve to the control circuit; terminals of drive lines for supplying electric power from the fuel cell unit 20 side to the device load portion and the secondary battery, and drive lines 32a to 32g for supplying electric power to the safety valve, the pressure sensor for detection, and the pressure regulating valve. Further, the terminal substrate 30b is provided with a 1 terminal 32h and a ground terminal (GND) 31i of a drive wire for supplying power from the fuel cell unit 20 side to the device load portion and the secondary battery.
In this way, by disposing two different sets of drive lines for supplying electric power on the same terminal substrate, the wiring length in the fuel cell system is reduced. Therefore, the number of assembly steps can be reduced, and the interior of the fuel cell system can be simplified.
The equilibrium pressure of the hydrogen absorbing alloy also varies depending on the temperature of the hydrogen absorbing alloy, and the equilibrium pressure also increases with the temperature rise. For example, when a hydrogen storage alloy containing LaNi5 of AB5 type as a main component is used, it is desirable that the equilibrium pressure is not less than normal pressure at 0 ℃, 0.6MPa at 45 ℃ and not more than 1.0MPa at 60 ℃, assuming that the use environment is about 0 to 45 ℃. Therefore, it is preferable to use a hydrogen absorbing alloy material having an equilibrium pressure of about 0.25 to 0.35MPa at 20 ℃.
A pressure adjusting mechanism is formed between the 1 st glass substrate 11 and the 2 nd glass substrate 12. Fig. 2 is a sectional view showing a specific structure of a part of the pressure adjustment mechanism of the fuel cell system 10 shown in fig. 1A.
In FIG. 2, the 1 st glass substrate 11 is disposed on the hydrogen absorbing alloy container 17 via a tilt adjusting member 35 and an O-ring (sealing member) 36. Further, a2 nd silicon substrate 14 and a 3 rd silicon substrate 37 are arranged on the 1 st silicon substrate 13.
A movable-side driving electrode plate 45 bonded to the diaphragm 43 is provided at an upper position of the 2 nd silicon substrate 14. Further, a relay terminal substrate 47 is provided on the 2 nd silicon substrate 14, and a fixed-side drive electrode plate 46 is provided on the relay terminal substrate 47. The movable-side driving electrode plate 45 and the fixed-side driving electrode plate 46 are arranged at opposing positions to form a set, and operate as a pressure sensor for detecting pressure in accordance with a change in capacitance. In this case, although not shown, two sets of driving electrode plates may be arranged.
Between the 1 st silicon substrate 13 having a flow path formed on the lower surface side and the pressure sensor for detection, a cavity 44 is present in the 2 nd silicon substrate 14. A protective film 42 is formed on the inner surface of the cavity 44 to prevent the 2 nd silicon substrate 14 from being corroded by gas or the like.
On the other hand, a sine wave voltage circuit 40 using a quartz resonator and an IC chip (DRV-HAIC) 38 for a driver circuit and an amplitude amplification detection circuit are bonded to the upper surface of the 3 rd silicon substrate 37.
The DRV-HAIC chip 38, the relay terminal substrate, and the plurality of pin terminals are connected by the bonding wire group 28a (bonding wires 28). For example, the upper side of the 3 rd silicon substrate 37 and the plurality of pin terminals 29a are bonded by a part of the bonding wire group 28 a.
Fig. 3 is an external perspective view showing an example of joining and assembling the fuel cell device 20 and the hydrogen storage alloy container housing 18. The main body of the fuel cell system is joined to each other by a hydrogen storage alloy container housing 18 and a fuel cell unit 20 to constitute a fuel cell system 10.
The fuel cell system 10 is configured such that both ends of the device are sealed with sealing members made of synthetic resin or rubber, and the outer shape is rectangular. Further, a plurality of protrusions are formed on the upper surface.
A recess for accommodating the fuel cell unit 20 is formed in the upper surface of the hydrogen storage alloy container housing 18 along the longitudinal direction of the fuel cell unit 20. The bottom surface of the recess serves as the upper surface of the heat insulating member 19 or the upper surface of the 2 nd glass substrate 12. In this way, in the fuel cell system 10 of the present embodiment, a recess is provided on the upper surface of the hydrogen storage alloy container housing 18, the fuel cell device 20 is inserted into the recess, the synthetic resin portions on both sides of the fuel cell device 20 are press-fitted, and then, the synthetic resin portions are joined by screws or adhesives, not shown. At this time, a plurality of protrusions are exposed on the upper surface of the fuel cell device 20. In this way, by forming the projection portion on the fuel cell unit 20, the assembly is simplified.
The fuel cell device 20 is attached to the hydrogen storage alloy container housing 18 and sealed with an ultraviolet curing adhesive member (not shown). The cathode electrode of the fuel cell device 20, which is provided with the plurality of vent holes 51 and covered with the stainless steel metal, is exposed on the upper surface of the fuel cell device 20. Further, a plurality of protrusions 52a, 52b, and 52c are provided on the upper surface of the fuel cell device 20.
Between the near-side projecting portions 52b and 52c in fig. 3, an air inlet 55 serving as an opening portion through which air passes is provided. The air inlet 55 serves as a space through which air can flow when the fuel cell unit 20 is inserted into a battery compartment of a mobile phone, for example. In this case, when the fuel cell system 10 is inserted into the battery housing chamber (not shown), the air inlet 55 on the fuel cell system side and, for example, a battery cover (not shown) of a cellular phone to which the sponge member (モルトプレーン) is joined are spaced apart from each other by a desired distance. The air sucked from the sponge member of the battery cover through the air inflow port 55 is sucked into the plurality of air vents 51.
When the fuel cell system 10 is inserted into the cell housing chamber, there is no increase or decrease in the amount of pressurization based on the contact pressure between the protruding portion of the fuel cell system 10 and the guide surface of the inner surface of the cell housing chamber.
A plurality of cooling fins 54 having a rectangular uneven shape are provided on the front surface of the fuel cell system 10, and these fins have an uneven shape in the vertical direction on the paper surface. A chamfer with a radius of about 0.3 to 1mm is provided on a line where the air inlet 55 and the protrusion of the cooling fin 54 intersect. The edges of the end portions of the projections 52b and 52c between the openings are also provided with the same chamfer (radius of about 0.3 to 1 mm). At this time, as shown in fig. 3, the projections 52d and 52c of the air inlet 55 and the projection of the cooling fin 54 are chamfered, whereby the eddy (cavitation) of the air flowing in at the outlet of the air inlet 55 can be reduced.
Further, an air intake port 25, a hydrogen discharge port 58, and a hydrogen supply port 24 are provided in the recess of the cooling fin 54. Here, in the fuel cell system 10 shown in fig. 1 and 3, the fuel cell unit 20 and the hydrogen storage alloy container 17 are integrated by the hydrogen storage alloy container housing 18, but a connector may be provided in the piping path a21 so that only the hydrogen storage alloy container can be attached to and detached from the battery housing chamber in the electronic device.
Fig. 4A and 4B are sectional views showing the structure of the fuel cell device 20, fig. 4A being a sectional view in the vicinity of one end, and fig. 4B being a sectional view in the vicinity of the other end.
The fuel cell device 20 includes a polymer solid electrolyte membrane 61, an anode electrode plate 62, a 1 st metal plate 64, a cathode electrode plate 63, and a2 nd metal plate 66. The polymer solid electrolyte film 61 is, for example, a sheet material having a thickness of about 75 to 100 μm. The 1 st metal plate 64 is, for example, stainless steel of about 0.5 to 1 mm. The 2 nd metal plate 66 is made of, for example, a magnetic member of about 0.5 to 1mm, and has a plurality of air vents (air suction ports 67 a) formed by etching.
The thin film magnet layer 71a magnetized in the thickness direction is bonded to the gap (space) between the polymer solid electrolyte film 61 disposed on the 1 st metal plate 64 and the inner side of the side wall of the 1 st metal plate 64. The thin-film magnet layer 71a has a thin film layer made of a rare-earth magnet such as SmCo, and the thin-film magnet layer 71a and the 1 st metal plate 64 are bonded together with an ultraviolet-curable adhesive.
The 1 st metal plate 64 is formed with a hydrogen injection port 65, and a plurality of positioning pins 72a are provided upright. Further, an anode electrode 62, a polymer solid electrolyte membrane 61, and a cathode electrode 63 are laminated on the 1 st metal plate 64. A bush (push) 75a made of an insulating material is embedded in the 2 nd metal plate 66. The fuel cell device 20 is bonded to the hydrogen storage alloy container housing 18 with an ultraviolet curable adhesive so as to be aligned with the hole position of the piping path B22 where the hydrogen inlet 65 is exposed.
In assembling the fuel cell device 20, the 2 nd metal plate 66 is attached to the laminated structure of the anode electrode plate 62/the polymer solid electrolyte membrane 61/the cathode electrode plate 63. At this time, when the bush 75a of the 2 nd metal plate 66 is inserted into the positioning pin 72a, the 1 st metal plate 64 and the 2 nd metal plate 66 are joined by the attraction force of the thin-film magnet layer 71 a. Therefore, the laminated structure of the anode electrode 62, the polymer solid electrolyte membrane 61, and the cathode electrode 63 is formed by pressing the 1 st metal plate 64 and the 2 nd metal plate 66 against each other.
Therefore, by appropriately selecting the attraction force of the thin-film magnet layer 71a, the amount of pressure applied to the laminated structure of the polymer solid electrolyte membrane 61, the anode-side electrode plate 62, and the cathode-side electrode plate 63 can be adjusted, and the 1 st and 2 nd metal plates 64 and 65 can be integrated.
In the present embodiment, the 2 nd metal plate 66 is provided with a plurality of spiral grooves 68 having a bending action and a pressing portion 69 for pressing the cathode-side electrode plate 63. Thus, the pressing portion 69 provided locally in the 2 nd metal plate 66 serves as a secondary processed surface for uniformly contacting the peripheral portion of the cathode-side electrode plate 63. Thereby, flatness can be maintained.
Fig. 4B shows the vicinity of the other end of the fuel cell unit shown in fig. 4A. The other end portion has a configuration substantially the same as that of the fuel cell unit 20 shown in fig. 4A. Therefore, the same reference numerals are given to the same components as those in fig. 4A except that a is changed to b, and therefore, the description thereof is omitted here. However, the projection portion on the upper surface is formed on the entire surface in the width direction, and a step serving as an air inlet is not provided.
In the present embodiment, a plurality of positioning pins are provided upright on the upper surface of the hydrogen storage alloy container housing 18, and a plurality of fitting holes are provided in the 1 st metal plate 64 or the synthetic resin portion in the fuel cell device 20. The hydrogen storage alloy container housing 18 and the fuel cell device 20 can be accurately positioned by inserting the fitting hole in the fuel cell device along a positioning pin, not shown, provided upright on the hydrogen storage alloy container housing 18 and then joining them with an ultraviolet-curable adhesive.
Next, a combination of the fuel cell system and the display of the remaining amount of the electronic device incorporating the secondary battery and the CPU will be described with reference to fig. 5A and 5B.
The hydrogen storage alloy container housing 18 has a hydrogen storage alloy container 17, an opening/closing valve 82 disposed on the 2 nd silicon substrate 14, a pressure sensor 83 for detection, and a pressure regulating valve 84. The fuel cell device 20 includes an anode-side electrode plate 62, a cathode-side electrode plate 63, and a polymer solid electrolyte membrane 61.
A portable electronic device (for example, a cradle device of a digital camera) 100 is provided with a CPU120, a secondary charger (secondary battery) 101, a device load section 103, a changeover switch 102, a memory (storage unit) 108, a display section 109, an input operation section 104, a temperature sensor 105 as a temperature detection section, and a battery storage chamber (not shown).
The CPU120 is a control circuit. The switch 106 is turned off according to an instruction of the CPU 120. The secondary battery 101 initially drives the on-off valve 82, the detection pressure sensor 83, and the pressure regulating valve 84. The device load unit 103 is, for example, a current detector for detecting the remaining amount of the secondary battery 101, or an electronic camera having the secondary battery 101 which can be mounted on a cradle device. Data based on a temperature change (tables in fig. 11A and 11B) is stored in the memory 108. The display unit 109 displays the remaining amount of the fuel cell. The input operation unit 104 is configured by a user operating input keys. The temperature sensor 105 detects the temperature. The battery housing chamber has the same contact terminals (constituted by a plurality of contact terminals for direct connection to the signal lines 31a to 31h and the drive lines 32a to 32 h).
The piping path from the pressure regulating valve 84 is connected to the anode electrode plate 62. The CPU120 monitors an output signal of the temperature sensor 105 provided in the electronic apparatus 100. Then, the remaining amount display of the fuel cell 20 and the current value of the device load portion 103 are monitored.
The CPU120 can switch the power supply from the secondary battery 101 to the fuel cell unit 20 using the Switch (SW) 102 after the fuel cell unit 20 is connected to the electronic apparatus 100. Here, when the remaining amount of the fuel cell apparatus 20 is detected, the output signal from the device load portion 103 is not used, but the output signal from the detection pressure sensor 83 and the output signal from the temperature sensor 105 are used. That is, the remaining amount of the fuel cell unit 20 is detected from the remaining amount calculation value of the data (table of fig. 11A and 11B) based on the type and temperature characteristic of the hydrogen storage alloy container 17 (for example, AB type 5 of B corporation) stored in the memory 108 and designated by the user, and displayed on the display unit (display) 109. Thereby, the user can confirm the margin.
For example, when the electronic apparatus 100 is a video camera, the device load unit 103 is assumed to be a lens driving device or an optical disc driving device. In this case, the temperature sensor 105 may be, for example, a thermistor temperature sensor. The location of the temperature sensor 105 may be, for example, a location exposed on the exterior surface, or a location near a battery compartment, a location near an optical disk (phase change recording medium or perpendicular magnetization recording medium), a location near a magnetic disk, or a location near an imaging device (CCD or CMOS). Or may be in the vicinity of an IC chip for a lens driving circuit, a camera module device, or a secondary battery.
The temperature sensors 105 may be provided at a plurality of locations of the electronic apparatus 100. For example, among the above-described placement locations, a location related to recording and reproduction of the electronic device (a location near an optical disk (phase change recording medium or perpendicular magnetization recording medium) or a magnetic disk, or a location near an imaging device (CCD or CMOS)) may be selected, and a location capable of measuring an external ambient temperature may be selected. If this is made to correspond to the on-off control of the fuel cell system 10, the detection of the temperature abnormality of the control circuit (CPU 120) becomes simple, and the power consumption of the fuel cell system 10 can be suppressed.
The sine wave voltage circuit 40 starts driving according to an instruction of the CPU 120. The output signal of the sine wave voltage circuit 40 forcibly vibrates the diaphragm 43 by a drive circuit of the IC chip for drive circuit/amplitude amplification circuit (DRV-HAIC chip) 38. When the pressure of the diaphragm 43 is increased or decreased, the amplitude of the output signal changes. The output signal is input to the CPU120 of the electronic apparatus 100 through an amplitude amplification circuit (preamplifier) of the IC chip 38 (DRV-HAIC chip) of the driver circuit/amplitude amplifier circuit. The CPU120 performs feedback control based on a reference value from the memory (ROM) 108.
Fig. 6 is a block diagram showing the configuration of the CPU120 and its peripheral parts for explaining the remaining amount detection and the battery abnormality detection of the fuel cell.
In fig. 6, a CPU (microprocessor) 120 that performs various kinds of control according to a program includes an arithmetic processing unit 120a, a work memory storage unit 120b, and an abnormality detection unit 120 c. The storage unit 120b has a measurement data storage unit 120b1For example, a reference data storage unit 120B storing a data table shown in fig. 11A and 11B described later2And a correction data storage part 120b3. Although not shown here, the CPU120 further includes a program ROM described later.
The storage unit 120b is connected to a pressure sensor 83 for detection via an a/D converter 125, and to a temperature detection unit (temperature sensor) 105 via an a/D converter 124. The input operation unit 104 is also connected to the storage unit 120 b. The work memory storage unit 120b is connected to the display unit 109 via the arithmetic processing unit 120a and the abnormality detection unit 120 c. The display unit 109 includes a remaining battery level display unit 109a for displaying the remaining battery level and a battery abnormality display unit 109b for displaying a battery abnormality. The remaining amount may be displayed by changing the color according to the type of the fuel cell, or may be displayed together with the usable time.
The abnormality detector 120c is provided to block the fuel cell unit 20 from the device load unit 103. When the abnormality detector 120c cuts off the connection between the fuel cell 20 and the device load unit 103, the device load unit 103 connected to the fuel cell 20 is cut off by, for example, a switch of the step-up DC/DC converter, and the power generation is stopped. After the power generation of the fuel cell unit 20 is stopped, the fuel cell unit 20 is connected to the secondary battery 101. That is, the CPU120 connects the output terminal of the fuel cell unit 20 from the device load 103 to the secondary battery 101 after the power generation of the fuel cell unit 20 is stopped, thereby charging the secondary battery 101 with the residual power generated by the hydrogen and air remaining in the fuel cell unit 20. This eliminates the need to discharge hydrogen remaining in the fuel cell system 10 to the outside. At this time, the secondary battery 101 is charged while securing a free capacity equal to or larger than a predetermined value.
Next, the operation of the main routine of the remaining amount detection of the fuel cell system 10 of the electronic device (when a camera using an optical disc recording medium is used) will be described with reference to the flowcharts of fig. 7A and 7B. In addition, it is assumed here that the device load section 103 employs an electronic camera.
In the above configuration, first, in step S1, the process of starting the fuel cell system 10 is performed. Then, in step S2, the fuel cell system 10 starts operating. Then, in step S3, the normal operation of the fuel cell system 10 is confirmed. The normal operation here means that the output signals from the temperature sensor 105, the pressure sensor 83 for detection, and the pressure regulating valve 84 are recognized to be within a predetermined range by the arithmetic processing unit (CPU) 120 a. If the arithmetic processing unit 120a determines "normal operation", the process proceeds to step S4.
In step S4, it is checked whether or not there is an operation of "operation (on) of operation SW (switch)" from the input operation unit 104. Here, the process proceeds to step S5 when the user has operated (turned on) the operation SW (switch), and otherwise proceeds to step S15 described later. Here, since the device load section 103 is an electronic camera, the operation SW is considered to be, for example, a photographing SW. In step S5, the subroutine "battery remaining level check" is executed. The specific operation of the subroutine "remaining battery level check" will be described later.
If the action of the subroutine "battery level check" has been executed at the above-described step S5, it is determined as "state of error flag" at the following step S6. Here, if the error flag is set (f _ err is 1), the process proceeds to step S31 described later, and if the error flag is cleared (f _ err is 0), the process proceeds to step S7.
In step S7, image data acquisition into an image pickup unit (not shown) of the electronic camera, which is the device load unit 103, is started, that is, image data storage into the buffer memory is started.
Then, in step S8, the access unit of the recording medium starts recording of the image data, that is, starts transferring the image data from the buffer memory to the recording medium (not shown).
For example, when the recording medium is an optical disc, the optical head is moved to a sector at a recording start position on a desired track of the optical disc recording medium in random access control in accordance with a recording start command from a control Circuit (CPU) of the optical disc apparatus. At this time, when the recording start position cannot be accessed, a retry operation is performed. When reproducing the recorded image, the image data recorded in a plurality of different sector areas on a desired track of the optical disk recording medium is reproduced on the display screen after the image data having an access time of the optical head or more is quickly reproduced and stored in the buffer memory. At this time, the retry operation is also performed when the optical head cannot be moved to the desired track on the optical disk, and the image information data is also transmitted from the buffer memory to the display screen in the retry operation at the time of the reproduction.
Then, in step S9, the status of the retry operation is determined by, for example, checking the remaining capacity of the buffer memory. Here, when there is no abnormality, the process proceeds to step S10, and it is checked whether or not there is an operation of "operated (off) operation SW (switch)". For example, it is checked whether the photographing SW of the electronic camera is turned off. Here, if the user does not turn OFF (OFF) the operation SW (switch), the process proceeds to the above-described step S9. On the other hand, in step S10, if the operation SW (switch) is turned OFF (OFF), the process of stopping the photographing operation is performed in step S11. Then, the process proceeds to step S4.
When it is determined in step S9 that the retry operation is abnormal, the routine proceeds to step S12, and a subroutine "remaining battery level check" is executed, which will be described later. Then, in step S13, it is determined that "the state of the error flag". Here, if the error flag is set (f _ err is 1), the process of stopping the photographing operation is performed in step S14, and the process proceeds to step S31. On the other hand, if the error flag is cleared (f _ err is 0) at step S13, the process proceeds to step S9.
In the above step S4, if the operation SW (switch), for example, the shooting SW is not on, the state of the playback SW (switch), not shown, is determined in step S15. Here, if the reproduction SW (switch) is not on, the process proceeds to step S26 described later. On the other hand, if the playback SW (switch) is turned on, the routine proceeds to step S16, and the subroutine "battery remaining amount check" described later is executed.
Then, in step S17, it is determined that "the state of the error flag". Here, if the error flag is set (f _ err is 1), the process proceeds to step S31 described later. On the other hand, if the error flag is cleared (f _ err is 0) at step S17 described above, the process proceeds to step S18.
In step S18, the access unit of the recording medium starts reproduction of the image data, that is, starts transfer of the image data from the recording medium to a buffer memory (not shown). Then, in step S19, the display control unit, not shown, starts generation of display data. That is, the reading of the image data from the buffer memory is started.
Then, in step S20, the presence or absence of an abnormality in the status of the retry operation is determined by, for example, checking the remaining capacity of the buffer memory. Here, if there is no abnormality, the process proceeds to step S21, and the operation state of the reproduction SW (switch) is determined. Here, if the user does not turn OFF (OFF) the reproduction SW (switch), the process proceeds to the above step S20. On the other hand, in step S21, if the playback SW (switch) is OFF (OFF), the processing for stopping the playback operation is performed in step S22. Then, the process proceeds to step S4.
When it is determined in step S20 that the status of the retry operation is abnormal, the routine proceeds to step S23, and the subroutine "remaining battery level check" described later is executed. Then, in step S24, it is determined that "the state of the error flag". Here, if the error flag is set (f _ err is 1), the process of stopping the playback operation is performed in step S25, and the process proceeds to step S31. On the other hand, if the error flag is cleared (f _ err is 0) at the above step S24, the process proceeds to the above step S20.
In the above step S15, if the reproduction SW (switch) is not turned on, it is determined in step S26 whether or not the recording medium (not shown) has been replaced. Here, if the recording medium has been replaced, the process proceeds to step S27, and a subroutine "remaining battery level check" is executed, which will be described in detail later. Then, in step S28, it is determined that "the state of the error flag". Here, if the error flag is set (f _ err is 1), the process proceeds to step S31 described later. On the other hand, if the error flag is cleared (f _ err is 0) in step S28, the process proceeds to step S29, and after the information on the recording medium is acquired, the process proceeds to step S4.
In addition, if the recording medium is not replaced in step S26, the state of the power supply SW (switch), not shown, is determined in step S30. Here, if the power switch is not turned OFF (OFF), the process proceeds to step S4, and the subsequent processes are repeated. On the other hand, if the power SW (switch) is turned OFF (OFF) in step S30, the process proceeds to step S31, where the operation of the fuel cell is stopped. Then, after the stop processing of the fuel cell system is performed in step S32, the routine is ended.
Next, the processing operation of the subroutine "remaining battery level check" of the fuel cell system according to the present embodiment will be described with reference to the flowchart of fig. 7C. In addition, the subroutines of steps S5, S12, S16, S23, and S27 in the flowcharts of fig. 7A and 7B are all the same.
After entering this subroutine, first, in step S41, a known battery function is read. Then, in step S42, it is determined whether or not a temperature sensor is present in the fuel cell device 20. Here, if there is a temperature sensor in the fuel cell unit 20, the subroutine is skipped, and the process proceeds to the corresponding steps of steps S6, S12, S16, S23, and S28 in the flowcharts of fig. 7A and 7B. Of course, at this time, information (remaining amount, error, etc.) may be displayed on the display unit 109 based on the temperature detected by the temperature sensor provided in the fuel cell. On the other hand, if no temperature sensor is provided in the battery, the process proceeds to step S43.
In step S43, the CPU120 writes the plurality of pieces of measurement data sampled from the temperature sensor 105 exposed to the outside of the electronic device (e.g., electronic camera) 100 or built in the IC chip for lens drive circuit into the measurement data storage unit 120b in the storage unit 120b via the a/D converter 1241In (1). In this case, when sampling is performed a plurality of times, an average value is obtained.
At this time, the slave and the temperature are controlled by the CPU120One of the portions related to the degree detection is selected and written into the measurement data storage unit 120b1In (1). Examples of the portion include a portion exposed on the exterior surface, a portion near a battery storage chamber or a disk (phase change recording medium or perpendicular magnetization amorphous recording medium), and a portion near an imaging device (CCD or CMOS). The temperature sensor 105 may be a thermistor or the like for detecting temperature disposed in an IC chip for a lens driving circuit or a secondary battery. The optical disk may be disposed in the vicinity of a disk (phase change recording medium or perpendicular magnetization amorphous recording medium), or in the vicinity of an imaging device (CCD or CMOS), or in a portion related to recording or reproduction of generated image data.
When a rapid temperature rise occurs in the electronic apparatus, the CPU120 selects the temperature detection unit 105 near the disk (phase change recording medium or perpendicular magnetization amorphous recording medium) or near the image pickup device (CCD or CMOS) as the above-described portion, and can appropriately cut off the fuel cell unit 90 and the device load unit 103. As a result, the consumption of the fuel cell can be suppressed.
The sampled measurement data of the pressure in the fine fluid flow paths 21 and 22 from the pressure sensor 83 for detection is written into the measurement data storage unit 120b through the a/D converter 1251In (1). In this case, when sampling is performed a plurality of times, an average value is obtained. When the pressure sensors 83 and 84 are arranged in parallel, the measured data at these two locations is written into the measured data storage unit 120b via the a/D converter1In (1).
On the other hand, if the pressure sensor for detection, the on-off valve, and the temperature sensor of the pressure control valve for the fine fluid flow path before factory shipment are arranged in parallel, the measured data thereof is written into the reference data storage unit 120b through the a/D converter2In (1). Thus, even a complicated fluid flow path can be obtained with a more accurate temperature difference.
As described above, the temperature detection unit (temperature sensor 10) of the electronic device is used5) The detected temperature and the like are written in the measured data storage part 120b1(step S43). In this way, in step S43, the temperature of the electronic device and the pressure in the fine fluid flow path measured by the temperature detector are recorded.
Then, in step S44, the error flag is cleared (f _ err ═ 0).
In step S45, it is determined whether or not the measured temperature of each device is equal to or higher than the temperature of the predetermined portion. Here, the temperature of the predetermined portion refers to the temperature of the imaging element, the temperature near the disk, or the output of a temperature sensor near the battery storage chamber.
Will be written into the measured data storage part 120b1The temperature and pressure values in (1) are compared with the limit value of the pressure in the pipe and the limit value of the temperature in the pipe shown in fig. 11 described later to determine whether or not there is an abnormality, and a flag signal "1" ("abnormal") or "0" ("normal") is written in the correction data storage unit 120b3In (1). In this way, the written correction data storage unit 120b is detected by the abnormality detection unit 120c3The flag signal "1" (═ abnormal) or "0" (═ normal) in (c). In the case of an abnormality (at or above the temperature of the predetermined portion), the process proceeds to step S50, and an error flag is set (f _ err is 1). Then, the process proceeds to step S51, and an error display corresponding to the signal is output to the battery abnormality display unit 109b in the display unit 109. This display is displayed by blinking with an LED, for example, in the event of an abnormality. Alternatively, the battery abnormality display unit 109b displays a message, for example, "battery abnormality". Please detach from the electronic device and mount the battery to the electronic device after a short while. ".
On the other hand, in step S46, the temperature difference between the temperature detected by the temperature detection unit inside the electronic device and the temperature of the fine fluid flow path is read based on the reference data stored in advance. This point will be described later as a PCT coefficient. Then, in step S47, the reference data is stored in the reference data storage unit 120b2Calculates a correction value based on the temperature difference, and writes the correction value in the correction data storage unit 120b3In (1).
In step S48, the arithmetic processing unit 120a writes the data to the measurement data storage unit 120b1The pressure detection value in (2) and the correction data written in the correction data storage unit 120b3The middle temperature value is stored in the reference data storage unit 120b2And calculating the residual quantity of the battery. Then, in step S49, the result of the remaining amount is displayed on the remaining battery amount display unit 109a in the display unit 109.
Specifically, a plurality of temperature sensors for detecting the temperature in the minute fluid flow path measured for acquiring data before factory shipment are arranged in parallel on the 1 st silicon substrate 13 in the cavity 44 shown in fig. 2 or on the same portion as the cavity of the pressure regulating valve, the opening/closing valve, and the pressure sensor for detection. The temperature sensor is joined to each of the above-mentioned portions as a microminiature temperature sensor.
Next, the voltage applied from the detection pressure sensor on the silicon substrate to the pressure control valve will be described with reference to fig. 8.
As shown in fig. 8, a hydrogen storage alloy material, i.e., an AB5 type LaNi5 and an AB2 type alloy, will be described as an example. The temperature/pressure-balance characteristics of these alloy materials vary from manufacturer to manufacturer and from type to type made by the same manufacturer. In the present embodiment, the voltage applied to the piezoelectric adjustment valve is determined from a table using the temperature/pressure-margin characteristic. Thus, it is possible to correct the difference due to the hydrogen storage alloy material (for example, when the temperature characteristics of the hydrogen storage alloys manufactured by A and B are different, the delta value is obtained at the current use temperature of 35 ℃). (in this case, the product manufactured by company A is 0.25MPa, the product manufactured by company B is 0.40MPa, and the product limit values manufactured by company A and company B are both 1 MPa.) at 20 ℃.
The pressure reference temperature for displaying the remaining amount was set to 27 ℃.
Here, the property required of the hydrogen storage alloy material is fast reaction. Also, there is a hysteresis (hystersis) in the absorption pressure and the discharge equilibrium pressure. Here, it is an object to correct these property differences due to differences in materials and the like. The location of the temperature sensor 105, the temperature difference from the internal pressure temperature of the piping path a from the hydrogen storage alloy container housing 18, and the internal pressure temperature difference of the pressure sensor need to be taken into consideration. In the use state of the electronic device 100, it is difficult to measure and display the remaining amount each time.
In fig. 8, the initial value is set to 20 ℃, and the current use temperature is set to 35 ℃. The PCT graph shown in fig. 9 may be used to obtain the residual amount display value from the pressure sensor value of 27.5 ℃ (for example, 27 ° may be obtained from an instruction from the CPU within a predetermined range). This can suppress the margin display error without being affected by the excessive pressure due to the temperature change.
Here, by obtaining the average value and grouping (a method in which the temperature measurement range is plotted every 2 ℃ to 3 ℃ in advance, the measurement points are specified, and the predetermined upper and lower ranges are regarded as the same measurement points), the storage capacity of the memory for storing the pressure line maps for each temperature measured in advance at the factory shipment can be reduced. Alternatively, although not shown, when a pressure sensor is configured by joining a pair of driving electrode plates, each of which is composed of a plurality of driving electrode plates using a resonator on the wall of the hydrogen storage alloy container interior 17, to a diaphragm, a temperature difference is present between the position where the temperature sensor is disposed and the hydrogen storage alloy container 18 covered with a metal material. When the pair of driving electrode plates in the hydrogen storage alloy container 17 are disposed apart from each other and the remaining amount is reduced, the output signal may be switched to the differential output signal. In this way, since there is a difference in environment, a temperature table of the average value of the current usage environment temperature of 35 ℃ and the normal temperature of 20 ℃ employed in the temperature characteristics is used.
The data characteristic table is obtained in advance before shipment, for example, when the residual capacity is measured using a pair of driving electrode plates in the hydrogen storage alloy container 17, or when the residual hydrogen level is measured using a known strain gauge (jp-a-6-33787). In this case, the same container as the product is processed twice, and the thermo-sensitive module is attached to the outer surface of the container so that the output of the temperature sensor changes to 20 ℃, 23 ℃, 27 ℃, 30 ℃, 32 ℃, 35 ℃, 40 ℃, 45 ℃ each time. The valve of the hydrogen storage alloy container 17 is opened, the hydrogen discharge amount at each temperature is determined by a hydrogen flow meter, and the hydrogen remaining amount is determined through an amplitude voltage circuit from a corresponding pair of driving electrode plates. That is, in the configuration of the fuel cell shown in fig. 10A, the relationship of the total consumption time of the fuel cell for each amount of hydrogen discharge is obtained.
The remaining amount display displays the percentage of the remaining amount time (remaining amount time/total consumed time) which can be obtained by subtracting the cumulative value of the number of times of use and the usage time of the pressure regulating valve and the safety valve from the total consumed time. Then, PCT coefficients at the respective temperatures are determined, and correlation (weighting) is determined. The data obtained here (tables of fig. 11A and 11B) is stored in the ROM 108. Thus, the remaining amount detecting sensor provided in the hydrogen storage alloy container can also be omitted.
A temperature-sensitive module (for example, a peltier element) wiring board is disposed in a concave surface of an outer surface of the hydrogen storage alloy container casing 18 made of a stainless material, and temperature control is performed by a CPU, so that the temperature can be stabilized at 20 ℃ (normal temperature). As a result, the output signal of the pressure sensor for detection can be stabilized. Therefore, only data at around room temperature (20 ℃ C.) can be stored. Thereby, the storage capacity of the memory (e.g., ROM108, etc.) can be greatly reduced.
PCT coefficients are explained here.
An example will be described in which, when a temperature sensor is not provided on a silicon substrate of a fuel cell system, each temperature sensor provided in an electronic device is used to display a margin.
In order to obtain the temperature difference correlation between the location where the temperature sensor in the electronic device is disposed and the temperature in the hydrogen pipe disposed on the silicon substrate in the fuel cell system, if the PCT coefficient is used, an accurate margin can be displayed without detecting an excessively large or excessively small margin.
When a temperature sensor such as a thermistor that converts the temperature used in a fuel cell housing chamber or a secondary battery cell near the fuel cell into a resistance is used, the temperature of the secondary battery detected by a temperature detection unit exposed on the surface of the fuel cell or the secondary battery cell is displayed with a margin by an a/D converter that converts an analog signal into a digital signal. Therefore, the value of the temperature is output to the arithmetic processing unit 120a for calculating the PCT coefficient in the CPU 120. The temperature sensor 105 detects the temperature of the fuel cell housing chamber or the secondary battery 101 in the vicinity of the fuel cell in a sampling cycle of several times every predetermined time, and outputs the detected temperature of the fuel cell housing chamber or the secondary battery 101 in the vicinity of the fuel cell to the PCT coefficient calculation processing unit 120 a. The PCT coefficient is calculated by the arithmetic processing unit 120a to obtain the correlation between the arrangement position of the temperature sensor 105 used in the electronic device 100 and the temperature in the fuel cell 90.
Fig. 9 is a pressure-margin line graph of a plurality of temperature characteristics. The use of the PCT coefficient δ is explained with reference to FIG. 9PCTMeter for displaying residual amount of0The temperature is switched. The remaining amount of the fuel cell at the measured temperature is indicated by a solid line, and the remaining amount of the fuel cell at the temperature in the hydrogen gas flow passage is indicated by a broken line.
Here, for example, the temperature of the fuel cell (30 ℃) or the secondary battery temperature is T4The hydrogen pressure at (30 ℃) is P4MPa. To determine the temperature T in the hydrogen tube provided with a pressure sensor for detection in a fuel cell0The internal structure of the camera is actually measured for each model. Here, for example, the temperature in the interior of the hydrogen tube is T0At (27 ℃), the PCT coefficient is deltaPCT＝T0－T4。
By performing the PCT coefficient calculation based on the temperature difference in this manner, the temperature inside the hydrogen pipe can be obtained even when the fuel cell does not have a temperature sensor built therein. And, in fuel electricityThe temperature of the fuel cell housing chamber (33 ℃) or the temperature of the secondary battery in the vicinity of the cell unit is raised to T4At (33 ℃ C.), the internal temperature of the hydrogen tube becomes T0(30 ℃ C.), PCT coefficient deltaPCTThe difference was 3 ℃.
Similarly, when a temperature detection unit is disposed in a camera module device such as a single-lens reflex camera, or a digital camera with waterproof function having a water depth and water pressure/temperature detection unit exposed to the surface of the digital camera and a water pressure/temperature detection unit (with humidity conversion) not shown, and capable of searching from a photographed album based on positional information such as the above data, PCT coefficient may be used.
Specifically, the present invention can be used for a digital camera or the like including a mechanism for opening and closing a cover of a camera lens for protecting a low temperature environment, such as a cold environment, and a drive circuit. In addition, if the digital camera is used for waterproof, the surface temperature is T3(10-20 ℃) and the hydrogen pressure value is PsMPa. Alternatively, the PCT coefficient may be determined for each of various usage environment conditions in the case of an alps or the like in which the air pressure changes.
In addition, if the camera is a digital camera for outdoor photography, the surface temperature is T1(35 ℃ C.), in any of the digital cameras, correction data for correcting the external air pressure, not shown, is stored in the memory. Alternatively, the remaining amount display may be stopped at a mountain, in water, or the like, and a warning display such as "remaining amount display stopped" may be performed on the display screen.
If the temperature T inside the hydrogen pipe provided with a pressure sensor for detection in the fuel cell is selected0(27 ℃ C.) and a PCT coefficient of δPCT＝T0－T1。
By performing such a calculation of the PCT coefficient, the temperature difference in the hydrogen pipe can be obtained even when the fuel cell unit does not have a built-in temperature sensor.
In addition, the handle is lightedTemperature in camera module device is set to T2(25 ℃ C.), if the temperature T inside the hydrogen pipe provided with the pressure sensor for detection in the fuel cell is selected0(27 ℃ C.) and a PCT coefficient of δPCT＝T0－T2。
By selecting the temperature sensor disposed at which position to calculate the PCT coefficients, the temperature inside the hydrogen pipe can be determined even when the fuel cell unit does not have a built-in temperature sensor.
The reference for selecting one temperature sensor from the plurality of temperature sensors is as follows.
(i) The temperature sensor arranged in an environment optimal for the fuel cell system (a desired position which is less susceptible to a temperature change in the electronic device or an external environment change when recording and reproducing on a recording medium when a terminal device such as an electronic camera is used) is selected from among a plurality of temperature sensors arranged in the electronic device, when the fuel cell system is mounted in a battery housing chamber in the electronic device, and it is possible to prevent an error in displaying the remaining amount of the fuel cell due to an erroneous detection by the temperature sensor.
(ii) By selecting a temperature sensor arranged in a portion (for example, a battery housing chamber) closest to the fuel cell system from among a plurality of temperature sensors arranged in the electronic device, a temperature distribution substantially matching the temperature in the fine fluid flow path pipe can be formed, and the storage capacity of data of pressure/temperature-margin and the like can be reduced.
(iii) By selecting the temperature sensor near the image pickup device or the recording medium, it is possible to quickly cope with an unauthorized recording signal caused by a temperature abnormality occurring in the electronic apparatus, and it is possible to suppress wasteful consumption of the fuel cell.
(v) When the temperature sensor is disposed in the holder device or the battery housing chamber of the electronic device, if the temperature sensor is located in the vicinity of the outer surface of the fuel cell unit, temperature information depending on the temperature rise of the fuel cell unit can be obtained, and more accurate remaining amount detection can be realized from the relationship between the temperature and the temperature in the micro fluid pipe.
As another method, the temperature inside the battery housing chamber may be measured by a thermistor mounted in the battery housing chamber in the electronic device, and the temperature difference between the temperature inside the battery housing chamber and the temperature inside the hydrogen flow path on the silicon substrate may be obtained, that is, may be obtained instead from the PCT coefficient.
Fig. 10 is a block configuration diagram of two fuel cell systems according to embodiment 1 of the present invention.
In fig. 10A, the hydrogen storage alloy container 17 is provided in the hydrogen storage alloy container housing 18. From the hydrogen storage alloy container 17, an on-off valve 82, a pressure sensor 83 for detection, a safety valve 131, a pressure regulating valve 84, and an auxiliary pressure regulating valve 132 are disposed through a piping path a, not shown. The pressure regulating valve 84 and the auxiliary pressure regulating valve 132 are connected to the fuel cell unit 20 through a piping path B, not shown.
The on-off valve 82 is an on-off valve for hydrogen supply having a valve mechanism that is opened when connected to the pipe path a and closed when the connection is released. The safety valve 131 is connected between the detection pressure sensor 83 and the external atmosphere port, has a structure of a micro valve of an electrostatic driving type or a diaphragm of a thermally deformable conductive material (for example, a shape memory alloy material) as a well-known technique, and has a switching function capable of turning on (valve opening) and off (valve closing).
In fig. 10B, from the hydrogen storage alloy container 135, 1 st and 2 nd opening/closing valves 137 and 138 and 1 st and 2 nd pressure sensors 139 and 140 for detection are arranged through a piping path a not shown. Further, between the 1 st and 2 nd detection pressure sensors 139 and 140 and the outside air port, 1 st and 2 nd relief valves 141 and 142 are disposed. Between the 1 st and 2 nd detection pressure sensors 139 and 140 and the fuel cell unit 145, 1 st and 2 nd pressure regulating valves 143 and 144 are disposed.
Next, operations of supplying hydrogen to the hydrogen storage alloy container and driving the fuel cell will be described.
Referring to fig. 10B, when hydrogen is supplied, not shown, the hydrogen storage alloy container 135 is connected to the hydrogen supply port having a mechanism for opening the valve by detachable connection, and hydrogen is supplied to the hydrogen storage alloy in the hydrogen storage alloy container 135 through the hydrogen supply port and stored. The hydrogen to be supplied is stored in the hydrogen storage alloy, and the remaining hydrogen gas is also present in the piping path from the 1 st and 2 nd opening/closing valves 137 and 138 to the fuel cell unit 145 in a state where the piping path and the opening/closing valves are shut off. When a power switch (not shown) of the portable device is turned on, the 1 st and 2 nd opening and closing valves 137 and 138 are opened, and the gas stored in the hydrogen storage alloy is supplied to the pressure regulating valve and mixed with the remaining hydrogen gas to form the same pressure as the internal pressure of the hydrogen storage alloy.
Then, the output signals from the detectors of the 1 st and 2 nd detection pressure sensors 139 and 140 are converted into a table (for example, the table of fig. 11A and 11B) stored in the memory (ROM) 108, and the pressure regulating valve is opened. When the hydrogen pressure in the fuel cell 145 reaches 0.1MPa during the operation of the hydrogen fuel cell, the fuel cell 145 starts to operate. In the example (company a) of fig. 10A, since the on-off valve 82 is provided, hydrogen stored in the hydrogen storage alloy for replenishing the consumed hydrogen is supplied from the on-off valve 82 to the fuel cell 20 through the pressure sensor 83 for detection and the pressure regulating valve 84 in this order. The fuel cell unit 20 continues to operate while the hydrogen pressure on the fuel cell unit 90 side is kept constant, and power is stably supplied to a portable device or the like, not shown. In this case, the detection pressure sensor 83 and the safety valve 131 are directly connected to each other. In addition, the tables in fig. 11A and 11B store management data for management of the type of hydrogen storage alloy, the hydrogen storage amount, the number of safety valves and flow paths, the capacitance, the limit value of the pressure in the pipe, the sensitivity of the pressure sensor, the year and month of manufacture, and the like. When the discharge flow rate of the pressure regulating valve is calculated based on the tables of fig. 11A and 11B, the difference in pressure between the actual measurement value output from the 1 st and 2 nd detection pressure sensors and the actual measurement value output from the 1 st and 2 nd pressure regulating valves can be detected.
In the present embodiment, in order to reduce the load of the high-pressure hydrogen gas on the pressure regulating valve, in the example (company B) of fig. 10B, a plurality of (here, two) 1 st and 2 nd opening/closing valves 137 and 138, 1 st and 2 nd detection pressure sensors 139 and 140, and 1 st and 2 nd pressure regulating valves 143 and 144 are arranged in parallel, respectively. The 1 st and 2 nd detection pressure sensors 139 and 140 are directly connected to the 1 st and 2 nd relief valves 141 and 142, respectively. And, the 1 st and 2 nd relief valves 141 and 142 are connected to the outside atmosphere. The 1 st and 2 nd opening/closing valves 137 and 138 and the 1 st and 2 nd safety valves 141 and 142 are opened by the operation of a diaphragm which is formed of an electrostatically driven micro valve or a thermally deformable conductive material (for example, a shape memory alloy material) as a well-known technique and has a switching function capable of turning on (valve opening) and off (valve closing). In addition, as another example (company C), when the No. 2 safety valve is not used, it is formed as a dummy.
In the case of a product of company B, when the pressure sensor for detection reaches a desired value after a predetermined time when the hydrogen gas is divided, the 1 st opening/closing valve 137 is closed and the 2 nd opening/closing valve 138 is opened, and then the 2 nd pressure sensor 140 for detection is monitored. The 1 st and 2 nd opening/closing valves 137 and 138 repeat the on/off operation under the monitoring of the pressure sensor for detection. When the pressure sensor for detection reaches the desired hydrogen pressure, the pressure regulating valve starts control so that the pressure in the fuel cell unit reaches 0.1 MPa. In addition, a plurality of on-off valves may be used simultaneously in order to protect the pressure regulating valve.
In such a configuration in which the on/off operation is repeated, chips such as a CPU and an analog switch are preferably embedded in the 2 nd silicon substrate.
Fig. 12 is a diagram showing an example of screen display of a fuel cell selected by user specification.
For example, in the example of fig. 12 (a), "hydrogen storage alloy" 130 and "methanol" 131 and "not selected" 132 are displayed on the display unit 109. In this display state, the user operates the input operation unit 104 to select, for example, "hydrogen storage alloy" 130, and thereby "AB 5 type hydrogen alloy" 133 and "AB 2 type hydrogen alloy" 134 can be displayed as shown in fig. 12 (b). Since the display and selection of such items are well-known techniques, the description thereof will be omitted.
Alternatively, the displays shown in fig. 12 (c) and (d) may be performed as the list display of fig. 12, but it is considered to be inconvenient for the user to select the fuel cell to be mounted from such a list display. Therefore, when the device load portion 103 is manufactured, it is preferable to store permission data of the types of hydrogen storage alloys that can be used by the device load portion 103 in the memory 108.
When the activation of the device load unit 103 is inputted with an operation start signal, the CPU120 operates the secondary battery 101. That is, as shown in fig. 5B, at the time of charging, the connection of the fuel cell unit 20 is switched to the connection of the secondary battery 101 by the change-over switch 102. In the case of a cradle device as a portable device, a device load unit (e.g., an electronic camera or the like) 103 is attached, and when the fuel cell unit 20 is operated, the CPU120 operates the changeover switch 102 to stop the operation of the secondary battery 101. Then, the control of the pressure regulating valve 84 and the fuel cell 20 are in an operating state, and the device load portion 103 operates. In this case, the CPU120 can be used also outdoors without a socket, for example, by using only the fuel cell unit 20 or using both the fuel cell unit 20 and the secondary battery 101.
(embodiment 2)
Next, embodiment 2 of the present invention will be explained.
When the fuel cell unit is configured as shown in fig. 4A and 4B, the shape of the 1 st metal plate 64 and the 2 nd metal plate 66 may cause the 1 st metal plate 64 and the 2 nd metal plate 66 to deform due to the internal pressure, and a contact failure with the anode-side electrode plate 62 or the cathode-side electrode plate 63 may occur. In this case, the contact area between the 1 st metal plate 64 or the 2 nd metal plate 66 and the anode side electrode plate 62 or the cathode side electrode plate 63 largely depends on the occupied area of the air vent of the 2 nd metal plate 66. Generally, the 2 nd metal plate 66 is about 1/3-1/2 of the 1 st metal plate 64.
Therefore, in embodiment 2, the fuel cell unit is configured as follows.
Fig. 13 shows a structure of a fuel cell device according to embodiment 2 of the present invention, fig. 13A is a perspective view showing the 2 nd metal plate side, and fig. 13B is a perspective view showing the 1 st metal plate side.
The polymer solid electrolyte membrane is integrally laminated with an anode-side electrode plate and a cathode-side electrode plate made of a conductive porous material. In assembling the fuel cell unit device sandwiched by the 1 st metal plate and the 2 nd metal plate, the 1 st metal plate and the 2 nd metal plate are required to be flat.
For example, the vent hole 163 having the shape shown in the drawing is formed in the 2 nd metal plate (stainless steel member) 161 having a thickness of 0.1mm by etching, and is overlapped and joined to the upper cover 160 having no vent hole 163. By forming in this way, the flatness of the vent holes of 0.1mm depth in the 2 nd metal plate can be ensured, and the vent holes can be accurately formed without variation.
A rectangular opening 162 is formed in the center of the upper cover 160. The opening 162 is an opening for feeding air to the air vent 163 of the 2 nd metal plate 161. A step 165 connected to the opening 162 is also formed. The linear portion where the step 165 intersects the front side surface 169 is formed in a smooth spherical shape having a radius of about 1 mm. Similarly, the straight portions where the side surface portions 166 on both sides of the step portion 165 intersect the upper surface are formed into a smooth spherical shape having a radius of about 0.5 mm.
In this way, the step 165 is formed in the center and on the front side, and the 1 st projection 171 and the 2 nd projection 172 are provided on both sides of the step 165. The height of the 2 nd protrusion 172 is about 0.5mm higher than that of the 1 st protrusion 171, thereby forming a step. These protrusions serve as guide surfaces when the fuel cell system is inserted into a battery housing chamber of a portable device, not shown, and air sucked from the battery cover is supplied from the step portion 165 and the opening portion 162 to the air vent 163 of the 2 nd metal plate 161.
Further, the surface of the opening 162 is also easily transformed into the surface of the opening 162 having the shape in which the small holes of about 100 circles, triangles, rectangles, and the like are dispersed, and the air is easily sucked from the small holes.
The flat 2 nd metal plate 161 made of stainless steel material having the vent 163 and the upper cover 160 made of synthetic resin are coupled by a rivet 173. Instead of mechanical joining by rivets 173, joining by an adhesive may be used.
A pair of magnetic members (e.g., stainless steel 304 members) 168 are bonded to the back surface 167 of the upper cover 160 with an adhesive in the longitudinal direction. Positioning hole 166a is provided in the vicinity of magnetic member 168 as a pair with positioning hole 166 b.
On the other hand, when the polymer solid electrolyte membrane, the anode electrode plate, the cathode electrode plate, the 1 st metal plate, and the 2 nd metal plate are made to have the same size and the hydrogen flow path is formed in the 1 st metal plate, there is also a problem that the depth of the hydrogen flow path is made uniform.
In order to solve these problems, Ni members are laminated on the 1 st metal plate of stainless material fitted to the pipe passage B by mechanical joining such as hot stamping or caulking, and then they are stacked. Then, before bonding, a hydrogen flow path is formed in the Ni member by etching.
For example, a vent hole having a shape shown in FIG. 13B is formed in a Ni plate 152 having a thickness of 0.1mm by etching, and the Ni plate is superposed and joined to the 1 st metal plate 151 having only a hole of the piping path B154. By forming in this way, the flatness of the hydrogen flow path 153 of 0.1mm deep of the Ni plate 152 can be ensured, and the Ni plate can be accurately formed without variation.
Thin-film magnet layers 156a and 156b of a permanent magnet material or the like are fixed to the 1 st metal plate 151 made of the stainless steel member 150 by an adhesive. A pair of metal positioning pins 157q, 157b are provided upright near the thin-film magnet layers 156a, 156 b. Further, if permanent magnets such as alnico magnets, ferrite magnets, and rare-earth magnets (e.g., SmCo) are used as the thin-film magnet layers 156a and 156b, the magnetic force is strong, and the thickness of the magnets can be reduced, but they are relatively expensive. For this purpose, ferrite Bonded magnets (Bonded ferrite magnets), Plastic Bonded magnets (Plastic-Bonded magnets), or rubber Bonded magnets (rubber-Bonded magnets) are used here.
The bonded magnet is relatively inexpensive, and the bonded magnet is not exposed to the outside, so that the bonded magnet can be used without breakage of the magnet. The bonding magnet may be bonded to the 1 st metal plate 151 using epoxy resin. Further, it is preferable to coat the surface of the bonded magnet for rust prevention or insulation. In addition, the directionality of the N pole or S pole does not need to be selected, and no operation error occurs when the bonded magnet is assembled.
(embodiment 3)
Next, embodiment 3 of the present invention will be explained.
Embodiment 3 relates to a fuel cell system having a plurality of fuel tanks and a plurality of fuel cells.
Fig. 14 is a block diagram showing the configuration of a fuel cell system according to embodiment 3 of the present invention.
1 st and 2 nd detection pressure sensors 185 and 186 and 1 st and 2 nd opening/closing valves 187 and 188 are arranged in parallel on a2 nd silicon substrate 183 through piping paths (not shown) from 1 st and 2 nd fuel tanks (hydrogen storage alloy containers) 181 and 182 of different hydrogen storage alloys. Further, a relief valve 191 is disposed between the 1 st and 2 nd opening/closing valves 187 and 188 and the outside atmosphere. Between the above-described 1 st and 2 nd opening/closing valves 187 and 188 and the 1 st and 2 nd fuel cell units 193 and 194, 1 st and 2 nd pressure regulating valves 189 and 190 are arranged, respectively.
1 st and 2 nd changeover switches 195 and 196 are arranged in series between the 1 st and 2 nd fuel cell units 193 and 194 described above and the device load portion 198 and the secondary battery 200.
The above-described 1 st and 2 nd fuel cell units 193 and 194 and the 1 st and 2 nd changeover switches 195 and 196 operate as follows.
By selecting the 1 st fuel cell unit 193 and the 2 nd fuel cell unit 194, the battery specification condition of the device load unit (the number of shots that can be acquired at the time of shooting, the time limit of moving images, the slide show time limit at the time of reproduction, and the like) 198 is changed.
As another specific example, a disk camera or video camera that records moving image or still image data captured in a user area of a disk-shaped recording medium made of a perpendicular magnetization film recording material or a phase change recording material may use a device having a temperature detection unit that detects temperature from a semiconductor laser built in a head portion of the disk device, a temperature sensor built in an access mechanism drive system that performs a seek operation in a radial direction of the head portion, or a temperature sensor disposed in the vicinity of the disk-shaped recording medium. In this case, a2 nd change-over switch (a 1 st change-over switch that does not select the 1 st fuel cell 193 and the 2 nd fuel cell 194) is arranged in parallel between the 1 st and 2 nd fuel cells 193 and 194, the device load portion 198, and the secondary battery 200.
In a fuel cell device having the 1 st and 2 nd fuel cell units, the fuel cell unit and a casing to which a set of fuel tanks (hydrogen storage alloy containers) for supplying fuel are attached are constituted, and a cooling element having an area smaller than the area of the back surface of the fuel tank is disposed in the vicinity of the fuel tanks. In the imaging apparatus, when the imaging element is activated to image the object, the cooling element is controlled to operate.
Alternatively, in a device load section including a temperature sensor for measuring the surface temperature of the IC chip for the lens driving circuit, the operation of the pair of fuel cells is controlled by the control circuit based on the measurement result of the temperature sensor. The control circuit starts the power supply to the cooling element or reduces the power supply amount to the fuel cell when the surface temperature of the IC chip for the lens drive circuit reaches a predetermined value.
In addition, the fuel cell may be cooled by the cooling element while the still image signal is transferred from the imaging element to the disk device after the control circuit starts the imaging operation when the device load portion operates. In this case, the imaging device is driven by the 1 st fuel cell, and the disk device and the buffer memory are driven by the 2 nd fuel cell. Then, the 1 st and 2 nd fuel cells are operated simultaneously without stopping.
From this operation, when the remaining amount of the 1 st fuel tank connected to the 1 st fuel cell unit reaches the limit value for driving the image pickup device, the disk device, and the buffer memory are switched to be driven by the 2 nd fuel cell unit.
When the remaining amount of the 2 nd fuel tank connected to the 2 nd fuel cell unit reaches the limit values of the drive disk device and the buffer memory, the control is switched to drive the image pickup device, the disk device, and the buffer memory by the 1 st fuel cell unit.
Therefore, when the user uses the image pickup apparatus, the notification display may be performed on a display device (LCD) so that the user can understand the state of the 1 st or 2 nd fuel cell unit (in both of the fuel cells or in either of the fuel cells), or the notification sound or the notification message may be issued by lighting a Light Emitting Diode (LED). Thus, the CPU can detect a pressure sensor in the fine fluid passage pipe using a temperature sensor or the like disposed in the vicinity of the disk in the disk device without stopping the operation of the disk device, and can operate the 1 st and 2 nd fuel cells to drive the image pickup device.
The remaining battery power notification display has a problem that the time during which the battery can be used in a low-temperature environment is shorter than that in a normal-temperature environment. For this purpose, the temperature sensor for detecting temperature is designed to be exposed to the outer package of the device load portion. Only when the detected temperature reaches a predetermined low temperature, if the respective on-off valves are opened to operate the 1 st and 2 nd fuel cells, electric power can be supplied from the two fuel cells to the respective drive circuits in the device load section. In this way, it is possible to protect the detection of the fuel remaining amount due to low temperature from being excessively small.
Therefore, the user can keep the photographing mode even in a low-temperature environment without performing an erroneous operation in the control circuit in the device load portion. Alternatively, in the shooting mode, when the flash lamp device flashes, the load variation of the voltage increases, but the fuel cell uses hydrogen as fuel, and therefore the power generation efficiency is higher than that of a fuel cell using methanol as fuel, and it is possible to cope with the load variation.
Further, the temperature detection sensor also serves as a temperature correction sensor of the camera module device, and thus the components of the device load portion can be reduced, and the device load portion of the present embodiment can be manufactured at low cost.
As another specific example, there is a cradle device for contactless charging (for example, japanese patent application laid-open No. 2006-203997). Here, two different types of fuel cells can be used as the power source of the cradle device for contactless charging. The device is provided with a recognition sensor for recognizing the weight and the shape of the device load part, and a primary coil.
As a cradle device to which the device load portion is attached, the device load portion (for example, an electronic camera) and a contactless charging cradle device (not shown) provided in the cradle device are attached to the contactless charging cradle device, and a secondary battery built in the device load portion is charged. A contactless charging cradle device in a cradle device has a primary coil and two different fuel cells for DC excitation of the primary coil built therein.
In addition, when the wake-up or charging time is set, a single fuel cell as a power source to be supplied to a backlight for timer display and a single fuel cell for dc-exciting the primary coil may be used together and incorporated in the cradle device. The device load unit incorporates a secondary coil electromagnetically coupled to the primary coil of the contactless charging cradle device and a charging control circuit for controlling a charging state of the secondary battery. When the device load unit is mounted on a cradle unit for contactless charging of the cradle unit, a secondary coil built in the device load unit is induced with a direct current, and a secondary battery built in the device load unit can be charged under the control of a charging control circuit.
Further, instead of the timer display for setting the charging time, a control circuit having a protection circuit for switching the switching element from on to off when the secondary battery is fully charged may be provided.
Further, a communication means is provided between the rack device and the device load unit, and when the remaining amount of the 1 st fuel cell is equal to or less than a predetermined value in a state where the 1 st fuel cell is connected to the secondary battery of the device load unit, the control circuit cuts off the fuel cell unit and the secondary battery, and after the supply to the secondary battery is stopped, a signal requesting the supply of electric power from the 2 nd fuel cell in the rack device is transmitted to the secondary battery of the device load unit via the communication means, whereby the secondary battery of the device load unit can be replenished.
The 2 nd changeover switch is provided to change over the remaining amount of the fuel cell from the device load portion to the secondary battery when the fuel tank generates high temperature and high pressure. In the high-temperature and high-pressure state of the fuel tank, the output signal of the 1 st or 2 nd detection pressure sensor is input to the CPU, and the CPU instructs the 2 nd changeover switch to operate to a switch drive circuit, not shown. After confirming that the user has turned on the power supply, the CPU monitors the output signal of the 1 st or 2 nd detection pressure sensor connected to the fuel tank (hydrogen storage alloy container) selected according to the instruction of the CPU.
When the output signal is equal to or less than a predetermined value, the CPU opens the 1 st or 2 nd opening/closing valve and then starts control of the 1 st or 2 nd pressure regulating valve. And, the hydrogen gas of the selected fuel tank flows from the 1 st or 2 nd pressure regulating valve to the fuel cell unit. When the pressure value measured in the fluid flow path from the fuel tank to the pressure regulating valve reaches a predetermined value or more exceeding the pressure allowable by the pressure regulating valve, the safety valve is opened, and the hydrogen gas can be discharged to the outside atmosphere, thereby protecting the pressure regulating valve.
In addition, although two fine fluid passages connected from a plurality of fuel tanks to each fuel cell unit are described here, the configuration of the fuel cell system having a simple fine fluid passage can be formed by forming a fine fluid passage connecting a single fuel tank and a single fuel cell unit so that the 1 st change-over switch can be omitted.
Further, if a weight is provided on the diaphragm-like fluid surface side of the pressure sensor for detection and a piezoelectric resistance element or a capacitance element is bonded to the diaphragm surface, an acceleration sensor is configured, and an output signal of the acceleration sensor is checked by a control circuit, and when an abnormality occurs due to the influence of external vibration, the remaining amount display can be switched to an error display.
According to the above embodiment, when an abnormality occurs in an electronic apparatus (for example, in the vicinity of an image pickup device or an optical disk) due to a rapid temperature rise, the control Circuit (CPU) cuts off the fuel cell unit and the device load unit based on an output signal from a thermistor temperature sensor in the vicinity of the optical disk, thereby suppressing battery consumption. At this time, the battery capacity displayed on the display unit of the electronic device may be cut off.
Next, the case of the printer dock (printer dock) is explained.
In a printer system in which a 1 st fuel cell is disposed in a digital camera and a2 nd fuel cell is disposed in a printer (a cradle device), control is performed by a temperature detection unit using a temperature sensor disposed on an outer surface of the printer or in a printer engine (for example, a peripheral portion of a print head) (in this case, data including a PCT coefficient specific to the printer is stored in a ROM in the same manner as in the case of the electronic camera described above), and power can be supplied from the 2 nd fuel cell disposed in the printer to a secondary battery of the digital camera. Further, when the digital camera is used, the remaining amount of the secondary battery is not insufficient, and the image data is automatically printed, whereby the image data can be reliably transferred to the printer to be printed without the user's intention.
For example, although the above embodiment has a structure in which a glass substrate and a silicon substrate as a semiconductor substrate are bonded, the glass substrate may be replaced with the semiconductor substrate, and both the semiconductor substrates may be bonded.
In addition, according to the above embodiment of the present invention, the following configuration can be obtained.
That is, (1) an electronic device is an electronic device having a fuel cell which includes: that is, the remaining amount device for a fuel cell is characterized in that the display color is changed for the 1 st fuel cell and the 2 nd fuel cell according to the type to display the remaining amount display of the fuel cell and/or the available time, thereby displaying the remaining amount display and/or the available time so that the remaining amount display can be more easily understood by the user.
(2) In the electronic equipment system using the fuel cell having a print control Circuit (CPU) and the remaining amount display device of the fuel cell in the electronic equipment mounting device,
the print control Circuit (CPU) transmits and receives information that is not allowed to be displayed to and from the control circuit of the electronic camera, and the remaining amount of the 2 nd fuel cell is not displayed on the display device of the electronic camera, so that power consumption due to the remaining amount display can be suppressed.
The preferred embodiments of the present invention have been shown and described. It will, of course, be understood that various modifications and changes in form or detail could readily be made without departing from the spirit of the invention. The present invention is not intended to be limited to the specific forms and examples described above, but rather to cover all modifications that may fall within the scope of the appended claims.
Claims (5)
1. An electronic apparatus, having: a fuel cell unit connected to the electronic device; a hydrogen storage alloy container for supplying fuel to the fuel cell unit; a flow path connected between the hydrogen storage alloy container and the fuel cell; a pressure detector for detecting a pressure in the flow path; a CPU calculation processing part for calculating the residual amount of hydrogen fuel in the hydrogen storage alloy container; a temperature sensor provided in the vicinity of the image pickup device and/or the vicinity of the recording medium of the electronic apparatus and detecting a temperature; wherein,
detecting the temperature in the vicinity of the image pickup device or the vicinity of the recording medium of the electronic apparatus, selecting the temperature in the vicinity of the image pickup device or the vicinity of the recording medium,
when the temperature near the imaging element or near the recording medium is lower than a predetermined temperature, reading a temperature difference between the temperature of the electronic device and the temperature of the flow path from reference data stored in advance, obtaining the temperature of the flow path from the temperature difference, and obtaining the remaining amount of the fuel cell from the temperature of the flow path and the pressure of the flow path,
when the temperature near the image pickup device or near the recording medium is equal to or higher than a predetermined temperature, an error flag is set and an error display is performed.
2. The electronic device according to claim 1, wherein the electronic device connected to the fuel cell includes at least a power output terminal of the fuel cell unit and an output signal terminal of the pressure detector.
3. The electronic device according to claim 1, wherein the electronic device connected to the fuel cell detects an abnormality of the fuel cell by comparing the detected temperature output value or the detected pressure with predetermined temperature and pressure limit values, and has a display unit that displays a battery abnormality.
4. The electronic apparatus according to claim 1, wherein a temperature sensor for detecting temperature is further provided at a plurality of temperature detection portions of the electronic apparatus, the plurality of temperature detection portions including at least one of: the electronic device is provided with a portion where the appearance is exposed, a fuel cell housing chamber, an IC chip for a lens drive circuit, a portion near the lens drive circuit board, and a portion near the secondary battery.
5. The electronic device according to claim 4, wherein the electronic device further comprises a changeover switch disposed between the secondary battery and the fuel cell, and when the temperature detected by the temperature detection is an abnormal temperature, the changeover switch is connected to the secondary battery, and the fuel supply to the fuel cell unit is stopped by closing an on-off valve of the fuel cell by the secondary battery.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006284197 | 2006-10-18 | ||
| JP2006-284197 | 2006-10-18 | ||
| JP2006331124 | 2006-12-07 | ||
| JP2006-331124 | 2006-12-07 | ||
| JP2007-235514 | 2007-09-11 | ||
| JP2007235514A JP5314869B2 (en) | 2006-10-18 | 2007-09-11 | Fuel cell remaining capacity detecting method and fuel cell remaining capacity detecting apparatus |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101823646A Division CN101174703B (en) | 2006-10-18 | 2007-10-18 | Method and device for detecting remaining amount of fuel cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102024964A CN102024964A (en) | 2011-04-20 |
| CN102024964B true CN102024964B (en) | 2014-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010530745.0A Expired - Fee Related CN102024964B (en) | 2006-10-18 | 2007-10-18 | Electronic equipment |
| CN2007101823646A Expired - Fee Related CN101174703B (en) | 2006-10-18 | 2007-10-18 | Method and device for detecting remaining amount of fuel cell |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101823646A Expired - Fee Related CN101174703B (en) | 2006-10-18 | 2007-10-18 | Method and device for detecting remaining amount of fuel cell |
Country Status (2)
| Country | Link |
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| JP (1) | JP5314869B2 (en) |
| CN (2) | CN102024964B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101148260B1 (en) * | 2008-10-30 | 2012-05-21 | 삼성전기주식회사 | Fuel cell system |
| KR101090031B1 (en) | 2009-04-08 | 2011-12-05 | 지에스칼텍스 주식회사 | How to Operate Fuel Cell System |
| JP5285037B2 (en) * | 2009-12-10 | 2013-09-11 | 財團法人工業技術研究院 | Hydrogen generation system, hydrogen generation method using solid hydrogen fuel, and method of supplying hydrogen to a fuel cell using solid hydrogen fuel |
| DE102011104711A1 (en) * | 2011-06-06 | 2012-12-06 | Zoz Gmbh | Vehicle with several storage tanks for hydrogen and method for displaying the available stock quantity and control for removal |
| JP6001315B2 (en) * | 2012-04-26 | 2016-10-05 | トヨタ自動車株式会社 | Gas filling system and vehicle |
| CN104865003B (en) * | 2015-05-26 | 2017-06-16 | 中国工程物理研究院总体工程研究所 | A kind of integrated hold-up vapour pressure and latent heat of vaporization combined test system |
| CN106766215B (en) * | 2016-11-14 | 2019-09-17 | 广东美的暖通设备有限公司 | Temperature sensor monitoring method and device, the hot-water heating system of water tank |
| JP6729616B2 (en) * | 2018-03-08 | 2020-07-22 | カシオ計算機株式会社 | Electronic device, power feeding control method, and program |
| CN113433474B (en) * | 2021-06-24 | 2022-08-26 | 杭州电子科技大学 | Non-contact monitoring device and method for charge state of lithium ion battery based on magnetic sensing |
| CN114784337B (en) * | 2022-06-17 | 2022-09-20 | 深圳市氢蓝时代动力科技有限公司 | Test system, generator and method for hydrogen gas circuit of fuel cell generator |
| CN116339278B (en) * | 2022-11-24 | 2023-12-12 | 威凯检测技术有限公司 | Intelligent kitchen electric circuit control board detection system and evaluation method |
| CN115789513B (en) * | 2022-12-08 | 2025-06-27 | 国家石油天然气管网集团有限公司 | A method and system for optimizing the combination of a liquefied natural gas gasification production line |
| CN119418666B (en) * | 2024-12-13 | 2025-04-18 | 惠科股份有限公司 | Polarity partition control module, display panel, drive module and display device |
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| CN1610163A (en) * | 2003-10-23 | 2005-04-27 | 株式会社日立制作所 | Fuel Cell Devices and Electronics |
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| JP2001295996A (en) * | 2000-04-14 | 2001-10-26 | Toyota Motor Corp | Hydrogen storage and supply device |
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- 2007-10-18 CN CN201010530745.0A patent/CN102024964B/en not_active Expired - Fee Related
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| CN1735990A (en) * | 2003-01-08 | 2006-02-15 | 株式会社尼康 | Electronic apparatus and its operation controllig method |
| CN1610163A (en) * | 2003-10-23 | 2005-04-27 | 株式会社日立制作所 | Fuel Cell Devices and Electronics |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2008166255A (en) | 2008-07-17 |
| CN102024964A (en) | 2011-04-20 |
| CN101174703B (en) | 2010-12-08 |
| JP5314869B2 (en) | 2013-10-16 |
| CN101174703A (en) | 2008-05-07 |
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