JP2010238539A - Fuel cell system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To actualize a means having simple construction for heating a fuel cell and a fuel storage portion while utilizing heat generated in electronic equipment. <P>SOLUTION: A fuel cell system 10 includes the fuel cell 12, the fuel storage portion 14 storing a hydrogen storage alloy for storing hydrogen to be supplied to the fuel cell 12, a heat transfer mechanism for transferring heat generated in the electronic equipment to which power generated by the fuel cell 12 is supplied, to the fuel cell 12 and the fuel storage portion 14, and a moving mechanism 46 for moving the heat transfer mechanism 40 with the heat of the fuel cell 12 or the fuel storage portion 14. The heat transfer mechanism 40 is so constructed that the quantity of the heat to be transferred to the fuel cell 12 and the fuel storage portion 14 is changed with the movement by the moving mechanism 46. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a fuel cell system that generates power using a fuel gas containing hydrogen.

  Conventionally, a primary battery or a secondary battery has been used as a power source for portable devices such as personal computers and cellular phones. In recent years, with the widespread use of portable devices and the accompanying downsizing and high performance, secondary batteries, which are main power sources, are required to be further downsized and increased in capacity. From such a viewpoint, a lithium ion battery having a high energy density and capable of being reduced in size and weight has been put into practical use, and demand is increasing as a power source suitable for portable devices.

  However, secondary batteries such as lithium ion batteries need to be connected to another power source for charging, and the charging usually takes several tens of minutes to several hours. It was difficult to use immediately after discharging.

  Therefore, a fuel cell has attracted attention as a power source for using an electronic device or the like when going out or without a power source for charging. A fuel cell has several to ten times the amount of energy that can be supplied per volume and weight as compared with conventional single and secondary batteries, and therefore, as a power source for driving small electronic devices. Useful. Moreover, since it can be used immediately if only the fuel is changed, it does not take time to charge unlike other secondary batteries. In addition, fuel cells are attracting attention because of their high power generation efficiency compared to conventional power generation systems and clean emissions from the reaction. Further, the fuel cell can be used instead of a commercial power source as a power source for charging the secondary battery, and the secondary battery can be charged even when carried. An example of the fuel used in the fuel cell is hydrogen. Examples of means for storing hydrogen include a hydrogen storage alloy.

  As the electrolyte membrane of the fuel cell, for example, a solid polymer membrane is used. The power generation reaction of such a polymer electrolyte fuel cell is usually performed at about 60 ° C to 80 ° C. Moreover, the power generation efficiency is about 50%, and the rest is heat. A state suitable for proton exchange in the electrolyte membrane is an appropriate temperature / humidified state. This is because if the temperature is too low and the humidity is too high, the phenomenon of so-called “flooding” in which the pores in the electrode are blocked with excess water tends to occur. On the other hand, if the temperature is too high and the humidity is too low, the electrolyte membrane will dry. This is because a so-called “dry-out” phenomenon is likely to occur, which respectively deteriorates the performance of the fuel cell.

  Thus, in order to fully demonstrate the performance of the fuel cell, it is necessary to maintain the operating temperature appropriately. To that end, it is conceivable to provide a means for heating and cooling to maintain the operating temperature of the fuel cell appropriately, separately from the fuel cell, but the configuration becomes complicated and leads to an increase in the size of the entire device. Not suitable for use in mobile devices.

  Therefore, it is conceivable to use heat generated by an electronic device connected to the fuel cell, instead of supplying heat from the outside to the fuel cell. Patent Document 1 discloses a fuel cell system including heat transfer means for supplying heat generated in a heat generating portion of an electronic device main body to a fuel cell.

  In addition, since the hydrogen storage alloy for storing fuel undergoes an endothermic reaction when hydrogen is released to the outside, it needs to be heated by some means in order to keep releasing hydrogen efficiently. Therefore, in Patent Document 2, a fuel tank that releases fuel by an endothermic reaction, a power generation unit that generates power by using fuel introduced from the fuel tank, and heat generated by the power generation unit are released to the outside. A fuel cell having an external heat dissipation portion is disclosed. This fuel cell connects a power generation unit, a fuel tank, and an external heat dissipation unit, supplies heat generated from the power generation unit to the fuel tank and the external heat dissipation unit, and supplies heat according to the temperature of the power generation unit and the fuel tank. It has heat connection means for controlling and maintaining the temperature of the power generation unit and the fuel tank in a certain range.

JP 2002-231290 A Japanese Patent Laid-Open No. 2007-80587

  By the way, the fuel cell needs to be heated when it does not reach a temperature suitable for power generation, such as when the system is started. In addition, the fuel storage portion that stores the hydrogen storage alloy needs to be heated in order to stably release hydrogen because the reaction when releasing hydrogen is an endothermic reaction.

  The present invention has been made in view of such a situation, and an object of the present invention is to realize a technique for realizing a means for heating a fuel cell and a fuel storage unit by using heat generated by an electronic device with a simple configuration. It is to provide.

  In order to solve the above-described problems, a fuel cell system according to an aspect of the present invention includes a fuel cell, a fuel storage unit that stores a hydrogen storage alloy that stores hydrogen supplied to the fuel cell, and power generation by the fuel cell. A heat transfer mechanism that transfers heat generated by the electronic device to which the electric power is supplied to the fuel cell and the fuel storage unit, and a moving mechanism that moves the heat transfer mechanism by the heat of the fuel cell or the fuel storage unit. The heat transfer mechanism is configured such that the amount of heat transferred to the fuel cell and the fuel storage portion changes according to movement by the moving mechanism.

  According to this aspect, the moving mechanism can move the heat transfer mechanism by the heat of the fuel cell or the fuel storage unit without requiring special energy from the outside. In other words, the amount of heat generated in the electronic device supplied to the fuel cell and the fuel storage unit can be changed by the heat of the fuel cell and the fuel storage unit.

  On the other hand, the hydrogen storage alloy stored in the fuel storage part undergoes an endothermic reaction when releasing hydrogen supplied to the fuel cell. Therefore, when heat is not supplied from the outside, the amount of released hydrogen decreases due to a decrease in temperature. End up. Therefore, for example, as the temperature of the fuel storage unit decreases, the heat transfer mechanism is configured so that the amount of heat generated in the electronic device supplied to the fuel storage unit increases, so that the fuel storage unit is initially stored. It is possible to maintain the temperature in a state where the temperature is below a predetermined temperature without increasing the temperature of the part so much. It should be noted that the heat transfer mechanism and the movement mechanism balance the heat generated by the electronic device and the heat supplied to the fuel cell and the fuel storage unit in a state where the power generation in the fuel cell and the release of hydrogen in the fuel storage unit are stable. In addition, each design parameter may be obtained by experiment or calculation.

  The area of the heat transfer mechanism that overlaps the fuel cell or the fuel storage portion may be changed as viewed from above according to the movement of the movement mechanism. Thereby, it is possible to easily control the amount of heat generated in the electronic device transmitted to the fuel cell or the fuel storage unit.

  The heat transfer mechanism may be moved by the moving mechanism so that the area overlapping with the fuel cell at the time of startup of the fuel cell decreases as the temperature of the fuel cell increases. Thereby, for example, as the temperature of the fuel cell rises at the time of startup, the amount of heat generated in the electronic device supplied to the fuel cell decreases. On the other hand, when the fuel cell is at a predetermined temperature or higher, the temperature can be maintained.

  The heat transfer mechanism may be configured such that the thermal resistance between the fuel cell or the fuel storage portion and the heat transfer mechanism changes according to movement by the moving mechanism. The change of the thermal resistance is realized not only by the change of the contact area but also by the gap between the heat transfer mechanism and the fuel cell or the fuel storage part, and the difference in the material and shape of each part.

  The fuel cell may be adjacent to a position where heat exchange with the fuel storage unit is possible. Thereby, the heat generated during power generation of the fuel cell can be used for heating the hydrogen storage alloy, and the energy efficiency of the entire system can be improved.

  You may further provide the mounting part fixed with respect to a main body and in which an electronic device is mounted. The heat transfer mechanism slides in a horizontal direction with respect to the lower surface of the mounting portion, and transmits a heat of the electronic device mounted on the mounting portion to the fuel cell or the fuel storage portion via the mounting portion. You may have. Thereby, since an electronic device does not contact a slide plate directly, the stable mounting state is maintained.

  The mounting portion is thermally connected to the heat transfer mechanism when the electronic device is placed and is disconnected from the thermal transfer mechanism when the electronic device is not placed. You may have a cancellation | release part. As a result, in a state where no electronic device is placed, the transfer of heat to and from the fuel cell and the fuel storage unit is cut off via the heat transfer mechanism. It is suppressed.

  The moving mechanism is slidably engaged with a groove provided on the upper surface of the fuel cell or the fuel storage portion, and is connected to a slide portion fixed to the lower surface of the heat transfer mechanism and one end in the sliding direction of the slide portion, An expansion / contraction part that slides the slide part by expanding / contracting according to and a biasing part that is connected to the other end in the sliding direction of the slide part and that biases the expansion / contraction part in a contracting direction may be included. Thus, for example, when a shape memory alloy spring is used as the expansion / contraction part and a bias spring is used as the biasing part, the shape memory alloy spring extends as the temperature rises, and the slide part moves, As the force decreases, the shape memory alloy spring can be contracted by the biasing force of the bias spring, and the slide portion can be moved reversibly without using a separate power source.

  The slide portion is configured such that the thermal resistance between the fuel cell or the fuel storage portion and the expansion / contraction portion is smaller than the thermal resistance between the fuel cell or the fuel storage portion and the heat transfer mechanism and the biasing portion. Also good. Thereby, since the heat of a fuel cell or a fuel accommodating part is efficiently transmitted to an expansion-contraction part via a slide part, the precision and responsiveness of a movement of a heat transfer mechanism become favorable.

  The heat transfer mechanism may include a plurality of moving members that move independently by the heat of the fuel cell and the fuel storage portion. Thereby, the supply of heat generated by the electronic device to the fuel cell and the fuel storage portion can be changed independently.

  According to the present invention, means for heating a fuel cell and a fuel storage portion using heat generated by an electronic device can be realized with a simple configuration.

It is the figure which showed typically schematic structure of the fuel cell system which concerns on 1st Embodiment. It is principal part sectional drawing which showed typically the fuel cell and fuel accommodating part which concern on 1st Embodiment. 1 is a perspective view showing an entire fuel cell system according to a first embodiment. It is a perspective view which shows the state which removed the mounting part from the fuel cell system. It is a schematic diagram for demonstrating operation | movement of the moving mechanism which concerns on this Embodiment. It is the perspective view which showed typically a mode that a slide plate was moved with a moving mechanism. It is a perspective view which shows the state which remove | excluded the slide plate from the state shown in FIG. It is AA sectional drawing of FIG. It is principal part sectional drawing which showed typically the state immediately after mounting an electronic device in the mounting part of a fuel cell system. FIG. 10 is a main part cross-sectional view schematically showing a state in which the slide plate has moved from the state shown in FIG. 9 to the fuel accommodating part side. It is principal part sectional drawing which showed typically the state which the slide plate further moved to the fuel accommodating part side from the state shown in FIG. It is principal part sectional drawing which showed typically the state immediately after mounting an electronic device in the fixing | fixed part of the fuel cell system which concerns on 2nd Embodiment. It is principal part sectional drawing which showed typically the state immediately after mounting an electronic device in the fixing | fixed part of the fuel cell system which concerns on 3rd Embodiment. It is principal part sectional drawing which showed typically the state which the slide plate moved from the state shown in FIG. It is principal part sectional drawing which showed typically the state which the slide plate moved further from the state shown in FIG. It is the side view which showed typically the contact state of the fuel cell which comprised the upper surface with the several member from which heat conductivity differs, and a slide plate. It is the side view which showed typically the contact state of the fuel cell which affixed the member from which heat conductivity differs in a part of upper surface, and a slide plate. It is sectional drawing which shows the outline of the fuel cell system which comprised the one part area | region of the fuel cell upper part with the material from which heat conductivity differs. It is a perspective view which shows typically the state which exposed the upper part of the fuel cell in the fuel cell system shown in FIG. It is principal part sectional drawing which showed typically the state which has not mounted the electronic device in the mounting part of the fuel cell system which concerns on 5th Embodiment. It is a schematic sectional drawing of the movement mechanism vicinity.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and repeated descriptions are omitted as appropriate. Moreover, the structure described below is an illustration and does not limit the scope of the present invention at all.

(First embodiment)
FIG. 1 is a diagram schematically showing a schematic configuration of the fuel cell system according to the first embodiment. FIG. 2 is a cross-sectional view of a main part schematically showing the fuel cell and the fuel storage part according to the first embodiment.

  A fuel cell system 10 shown in FIG. 1 includes a fuel cell 12, a fuel storage portion 14 adjacent to a position where heat exchange with the fuel cell 12 is possible, and a supply path for supplying hydrogen from the fuel storage portion 14 to the fuel cell 12. 16 (see FIG. 2), a regulator (pressure reducing valve) 18 (see FIG. 2) provided in the middle of the supply path 16, and a housing 19 for housing these members. As shown in FIG. 2, the fuel storage unit 14 includes a hydrogen storage alloy filling unit 14 a that stores hydrogen serving as fuel for the fuel cell 12. The supply path 16 supplies the hydrogen released from the hydrogen storage alloy filling portion 14 a toward the fuel cell 12. The regulator 18 adjusts the pressure of hydrogen released from the hydrogen storage alloy filling portion 14 a and supplies it to the fuel electrode 22.

  As shown in FIG. 2, the fuel cell 12 includes a plurality of cells 20 arranged on a plane. Each cell 20 has a membrane electrode junction comprising a fuel electrode 22 having an anode catalyst layer, an oxidant electrode 24 having a cathode catalyst layer, and a polymer electrolyte membrane 26 sandwiched between the fuel electrode 22 and the oxidant electrode 24. Prepare the body. Hydrogen is supplied to the fuel electrode 22. Air (oxygen) is supplied to the oxidizer electrode 24. The fuel cell 12 generates power by an electrochemical reaction between hydrogen and oxygen in the air.

  The electrolyte membrane 26 preferably exhibits good ionic conductivity in a wet state, and functions as an ion exchange membrane that moves protons between the fuel electrode 22 and the oxidant electrode 24. The electrolyte membrane 26 is formed of a solid polymer material such as a fluorine-containing polymer or a non-fluorine polymer, and for example, a sulfonic acid type perfluorocarbon polymer, a polysulfone resin, a perfluorocarbon polymer having a phosphonic acid group or a carboxylic acid group. Etc. can be used. Examples of the sulfonic acid type perfluorocarbon polymer include Nafion (manufactured by DuPont: registered trademark) 112. Examples of non-fluorine polymers include sulfonated aromatic polyetheretherketone and polysulfone.

  An electrolyte membrane 26 is joined to one surface of the fuel electrode 22. An anode side housing 30 is installed so as to cover the space including the fuel electrode 22.

  The anode-side housing 30 is provided with a fuel filling port 30a in which hydrogen gas is filled by a pressure difference from the fuel storage portion 14 provided outside the fuel cell 12. Then, when the hydrogen in the fuel chamber has decreased, hydrogen is appropriately replenished from the fuel storage unit 14.

  An electrolyte membrane 26 is bonded to one surface of the oxidizer electrode 24. A cathode side housing 34 is installed so as to cover the space including the oxidant electrode 24.

  An air intake port 34 a for air intake is provided on the main surface of the cathode side housing 34. The air flowing in from the air intake port 34 a reaches the oxidizer electrode 24. The air intake port 34a also has a function of escaping water generated during power generation to the outside as water vapor. Each cell 20 is electrically connected in series. Specifically, in adjacent cells, the oxidant electrode 24 of one cell and the other fuel electrode 22 are connected by wiring (not shown). Electricity generated by the fuel cell 12 is output to the outside through an output terminal 320 provided on the side of the fuel cell 12.

  The power output from the output terminal 320 is converted into a voltage / current that can be supplied to the electronic device 100 by the power conversion unit 36 and supplied to the electronic device 100. Electronic device 100 is driven by a built-in power supply or by electric power supplied from fuel cell system 10. At that time, the electronic device 100 emits heat from a built-in battery or CPU or other electronic device heat generating part 100a.

  In the fuel cell system 10 according to the present embodiment, the heat generated by the electronic device 100 placed on the upper surface of the fuel cell system 10 is transmitted through the movable heat transfer mechanism 40 described in detail later. In addition, heat exchange with the fuel storage unit 14 supplies necessary heat to the fuel cell 12 and the fuel storage unit 14.

As described above, the fuel cell 12 generates electromotive force by generating hydrogen as fuel to the fuel electrode 22 and supplying oxygen as oxidant to the oxidant electrode 24 to generate electricity. At that time, water is generated as a product. Here, the reaction at the fuel electrode 22 and the oxidant electrode 24 is as follows.
Fuel electrode: H ₂ → 2H ⁺ + 2e ⁻
Oxygen electrode: 2H ⁺ + (1/2) O ₂ + 2e ⁻ → H ₂ O

In the polymer electrolyte fuel cell 12, the chemical reaction between hydrogen and oxygen is an exothermic reaction. Therefore, when power generation is continued, the temperature rises and exceeds the temperature range suitable for power generation by the fuel cell. On the other hand, the reaction when hydrogen is released from the hydrogen storage alloy in the fuel storage unit 14 is an endothermic reaction. For example, in the case of LaNi ₅ that is suitable for use at room temperature, the endothermic amount is 30.1 kJ / mol.

  Therefore, in order to smoothly advance the reaction in the entire fuel cell system, the fuel cell system 10 uses the heat of the fuel cell 12 to heat the hydrogen storage alloy filling part 14a in the fuel storage part 14, in other words, the fuel The fuel cell 12 can be cooled by the accommodating portion 14.

  However, when the temperature of the environment in which the fuel cell system 10 is used is low or when starting at room temperature, heat radiation to the outside is large, and the temperature of the cell 20 itself of the fuel cell 12 may be low. There is a concern that the temperature of the cell 20 does not rise sufficiently in a short time only by heat generated by the reaction. Therefore, the present inventors have conceived that the heat generated in the electronic device 100 is used as the heat necessary for quickly raising the temperature of the cell 20 to an appropriate temperature. On the other hand, when the temperature of the fuel cell 12 is sufficiently increased, if the heat generated in the electronic device is continuously supplied in addition to the exothermic reaction, the heat may not be consumed by the endothermic reaction by the hydrogen storage alloy. . In that case, the temperature of the fuel cell 12 becomes higher than the desired operating temperature, and dryout occurs, causing a decrease in the performance of the fuel cell 12.

  Therefore, the present inventors not only supply the heat of the electronic device 100 to the fuel cell 12 and the fuel storage unit 14, but also the fuel cell 12 and the fuel storage unit 14 according to the temperature of the fuel cell 12 and the fuel storage unit 14. The present inventors have conceived a heat transfer mechanism 40 that can control the supply of heat to the heat exchanger.

  In the present embodiment, the electronic device 100 that is the target of power supply of the fuel cell system 10 only needs to include the electronic device heat generating part 100a. For example, a notebook personal computer, a portable terminal, a portable DVD player Etc. are suitable. Here, examples of the electronic device heat generating portion 100a include a CPU, a memory, an electronic component substrate, a display, and a battery that generate heat during use.

  FIG. 3 is a perspective view showing the entire fuel cell system according to the first embodiment. The fuel cell system 10 shown in FIG. 3 has a mounting portion 42 on which the electronic device 100 is mounted fixed to the upper portion thereof. The mounting portion 42 has a flat plate shape so that the contact area with the bottom of the electronic device 100 to be mounted becomes large and it can be used for various electronic devices 100. The material of the mounting part 42 is preferably an inexpensive material having a large heat capacity and high thermal conductivity. For example, copper, aluminum, and alloys thereof are suitable. In addition, considering the heat transfer to the heat transfer mechanism 40 below the mounting portion 42, it is preferable that the mounting portion 42 is thin as long as the strength is satisfied.

  FIG. 4 is a perspective view showing a state in which the mounting portion is removed from the fuel cell system. The heat transfer mechanism 40 transfers heat generated in the electronic device 100 to which power generated by the fuel cell 12 is supplied to the fuel cell 12 and the fuel storage unit 14. The heat transfer mechanism 40 according to the present embodiment slides horizontally with respect to the lower surface of the mounting portion 42, and heats the electronic device 100 mounted on the mounting portion 42 as fuel via the mounting portion 42. A slide plate 44 is provided to transmit to the battery 12 or the fuel storage unit 14. Thereby, since the electronic device 100 does not contact the slide plate 44 directly, a stable placement state is maintained.

  The slide plate 44 is provided with a guide 44a that engages with a guide groove (not shown) provided on the lower surface of the mounting portion 42 at an upper portion thereof, and is slid with respect to the mounting portion 42 by a moving mechanism described later. Slides stably while moving. The slide plate 44 is preferably made of a material having high thermal conductivity like the placement portion 42. The slide plate 44 is moved to the horizontal phrase by the moving mechanism 46.

  FIG. 5 is a schematic diagram for explaining the operation of the moving mechanism according to the present embodiment. FIG. 6 is a perspective view schematically showing how the slide plate is moved by the moving mechanism. FIG. 7 is a perspective view showing a state in which the slide plate is removed from the state shown in FIG. FIG. 8 is a cross-sectional view taken along the line AA of FIG.

  As shown in FIGS. 4 to 6, the moving mechanism 46 is slidably engaged with a groove portion 12 a provided on the upper surface of the fuel cell 12, and is fixed to the lower surface of the slide plate 44. 48 is connected to one end in the sliding direction, and is connected to the shape memory alloy spring 50 as an expanding / contracting portion that slides the sliding portion 48 by expanding / contracting according to the temperature, and the other end in the sliding direction of the sliding portion 48 to store the shape memory. And a bias spring 52 as an urging portion that urges the alloy spring 50 in a contracting direction. Further, of the both ends of the shape memory alloy spring 50 and the bias spring 52, the end opposite to the end connected to the slide portion 48 is connected to the heat insulating members 51 and 53. As a result, the heat flowing into the moving mechanism 46 is prevented from being released to the outside. 4 shows a state in which the slide plate 44 is detached from the slide portion 48 for convenience of explanation.

  The slide portion 48 is in contact with the upper surface of the fuel cell 12 and transmits heat from the fuel cell 12 to the shape memory alloy spring 50. The shape memory alloy spring 50 and the slide portion 48 are pushed leftward in FIG. 5 by the bias spring 52 at a low temperature. However, when the shape memory alloy spring 50 and the slide portion 48 are heated by the heat from the fuel cell 12 and become high temperature, the characteristics change. The restoring force of the shape memory alloy spring 50 gradually becomes stronger than the biasing force of the bias spring 52, and the slide portion 48 is moved to the right in FIG. Since the slide part 48 is being fixed to the lower part of the slide board 44, as a result, the moving mechanism 46 can move the slide board 44 as a whole.

  As described above, the shape memory alloy spring 50 is extended as the temperature rises, so that the slide portion 48 is moved, and the shape memory alloy spring 50 is contracted by the biasing force of the bias spring 52 as the temperature is lowered. The slide part 48 can be moved reversibly without the need for a power source. The slide plate 44 is provided with a guide (not shown) on the lower surface thereof, and is related to the guide groove 12 b formed on the upper surface of the fuel cell 12 and the guide groove 14 b formed on the upper surface of the fuel storage portion 14. Slide while mating.

  When the slide plate 44 is moved by the moving mechanism 46, the contact area where the slide plate 44, the fuel cell 12, and the fuel storage portion 14 can exchange heat changes. In other words, the area of the slide plate 44 that overlaps the fuel cell 12 or the fuel storage portion 14 changes as viewed from above according to the movement of the moving mechanism 46. Thereby, the amount of heat generated in the electronic device 100 transmitted to the fuel cell 12 or the fuel storage unit 14 can be easily controlled.

  The moving mechanism 46 according to the present embodiment can move the slide plate 44 by the heat of the fuel cell 12 without requiring special energy from the outside of the fuel cell system 10. In other words, the amount of heat generated in the electronic device 100 supplied to the fuel cell 12 and the fuel storage unit 14 can be changed by the heat of the fuel cell 12.

  Next, heat transfer when an electronic device is mounted on the fuel cell system according to the present embodiment will be described. FIG. 9 is a main part sectional view schematically showing a state immediately after the electronic device 100 is placed on the placement part 42 of the fuel cell system 10. During such startup, the temperature of the fuel cell 12 is substantially the same as the outside air temperature.

  The fuel cell system 10 in the state shown in FIG. 9 is in a state where the slide plate 44 and the fuel cell 12 are in contact with or opposed to each other, and the heat from the electronic device heat generating portion 100a of the electronic device 100 is transferred to the mounting portion 42 and the slide. It is transmitted to the fuel cell 12 through the plate 44. On the other hand, since the slide plate 44 is not in contact with the upper portion of the fuel storage portion 14 (not opposed), the heat of the electronic device 100 is not directly transmitted to the hydrogen storage alloy filling portion 14a.

  When the outside air is at a low temperature or when the fuel cell system 10 is started, the temperature of the fuel cell 12 tends to be lower than the optimum temperature for power generation. Therefore, a large amount of heat from the electronic device 100 can be supplied to the fuel cell 12. desired. Therefore, by setting the position of the slide plate 44 at the start of the fuel cell system 10 to the position shown in FIG. 9, the area where the slide plate 44 and the fuel cell 12 are in contact for a while from the start is maximized. It becomes possible. As a result, the fuel cell 12 is efficiently heated by the heat of the electronic device 100.

  On the other hand, when the fuel cell system 10 is started, the temperature of the fuel cell 12 is low, so that the amount of power generation is small and the consumption of hydrogen as a fuel is also small. Therefore, the temperature drop due to the endothermic reaction in the fuel storage portion 14 is small, and there is no need to promote the release of hydrogen by heating the hydrogen storage alloy filling portion 14a. Therefore, by setting the position of the slide plate 44 at the time of startup of the fuel cell system 10 to the position shown in FIG. 9, the area where the slide plate 44 and the fuel storage portion 14 come into contact is minimized for a while after the startup. It becomes possible to do. As a result, the fuel container 14 is unnecessarily heated by the heat of the electronic device 100 and the pressure is suppressed from increasing.

  FIG. 10 is a main part sectional view schematically showing a state in which the slide plate has moved from the state shown in FIG. 9 to the fuel accommodating part side. In the fuel cell system 10, when a certain amount of time elapses from the time of startup, the temperature of the fuel cell 12 itself gradually increases due to the exothermic reaction in the cell 20 during power generation and the heat supplied from the electronic device 100. Therefore, the temperature of the shape memory alloy spring 50 rises due to the heat supplied from the fuel cell 12 via the slide portion 48, and the force for moving the slide portion 48 to the right in the figure increases. As a result, the slide plate 44 to which the slide portion 48 is fixed also moves to the right.

  In the state shown in FIG. 10, the slide plate 44 is in a position overlapping the fuel cell 12 and the fuel storage portion 14 when viewed from above, and the heat generated in the electronic device 100 causes the placement portion 42 and the slide plate 44 to overlap. To the fuel cell 12 and the fuel storage portion 14 respectively. The fuel cell 12 generates more power as the temperature rises and consumes more hydrogen as a fuel. Therefore, it is necessary to increase the amount of released hydrogen supplied from the fuel storage unit 14 to the fuel cell 12.

  However, since the hydrogen storage alloy stored in the fuel storage unit 14 undergoes an endothermic reaction when releasing hydrogen supplied to the fuel cell 12, when no heat is supplied from the outside, the amount of hydrogen released decreases due to a decrease in temperature. Resulting in. As described above, since the fuel storage portion 14 is provided adjacent to the fuel cell 12, heat generated during power generation of the fuel cell 12 can be used to heat the hydrogen storage alloy in the fuel storage portion 14, and the system Overall energy efficiency can be improved. However, it is preferable to supply heat of the electronic device 100 to the fuel storage unit 14 when the temperature decrease of the fuel storage unit 14 cannot be sufficiently suppressed only by the heat supplied from the fuel cell 12.

  Therefore, as shown in FIG. 10, the fuel cell system 10 according to the present embodiment is configured such that the slide plate 44 moves to the upper surface of the fuel accommodating portion 14 as the temperature of the fuel cell 12 rises. Thereby, since the heat generated in the electronic device 100 is supplied to the fuel storage unit 14 more, the amount of hydrogen released from the hydrogen storage alloy filling unit 14a of the fuel storage unit 14 increases, and the fuel cell 12 can stably generate power. Can be continued.

  FIG. 11 is a main part sectional view schematically showing a state in which the slide plate is further moved from the state shown in FIG. 10 to the fuel accommodating part side. In the fuel cell system 10, when the temperature of the fuel cell 12 further rises from the state shown in FIG. 10, the slide plate 44 moves to the right in the drawing according to the temperature. When the temperature of the fuel cell 12 rises to an operating temperature suitable for power generation, the amount of power generation also increases and the amount of heat generated during the reaction also increases. Therefore, the power generation state is stable even when there is almost no supply of heat from the electronic device 100. That is, the temperature suitable for power generation can be maintained. On the other hand, the fuel storage unit 14 needs to be further supplied with heat from the electronic device 100 because it needs to release more hydrogen as the power generation amount in the fuel cell 12 increases.

  Therefore, in the fuel cell system 10 according to the present embodiment, as shown in FIG. 11, when the temperature of the fuel cell 12 rises to an operating temperature suitable for power generation, most of the slide plate 44 is placed on the upper surface of the fuel storage unit 14. Configured to move to. That is, the material and the spring constant of the shape memory alloy spring 50 and the bias spring 52 are set so that the slide plate 44 moves to the right end in a temperature range suitable for the operation of the fuel cell 12. As a result, the heat supplied from the electronic device 100 to the fuel storage portion 14 is maximized, the amount of hydrogen released from the hydrogen storage alloy filling portion 14a of the fuel storage portion 14 is further increased, and stable power generation of the fuel cell 12 is achieved. It is possible to continue.

  The moving mechanism 46 described above is provided in a groove 12a formed above the fuel cell 12 and moves the slide plate 44 in accordance with the temperature of the fuel cell 12, but the fuel accommodating portion shown in FIG. A moving mechanism may be provided in the groove portion 14 c provided on the upper surface of 14, and the slide plate 44 may be moved according to the temperature of the fuel storage portion 14. Thus, for example, as the temperature of the fuel storage unit 14 decreases, the amount of heat generated in the electronic device 100 supplied to the fuel storage unit 14 increases, in other words, the slide plate 44 and the fuel. By configuring so that the area in contact with the storage portion 14 is increased, the temperature of the fuel storage portion 14 is not increased so much at the initial stage, and is maintained above a predetermined temperature suitable for hydrogen release. Is possible.

  In summary, in the heat transfer mechanism 40 according to the present embodiment, the area of the slide plate 44 that overlaps the fuel cell 12 at the time of startup of the fuel cell 12 decreases as the temperature of the fuel cell 12 increases. It is moved by the moving mechanism 46. As a result, as the temperature of the fuel cell rises at the time of startup, the amount of heat generated in the electronic device 100 supplied to the fuel cell 12 decreases. On the other hand, when the temperature is higher than a predetermined temperature, the temperature can be maintained. Moreover, since the fuel cell system 10 can heat the fuel cell 12 with the heat of the electronic device 100 at the time of startup, power generation at an appropriate temperature can be performed at an early stage.

  Note that the heat transfer mechanism 40 may be configured such that the thermal resistance between the fuel cell 12 or the fuel storage unit 14 and the heat transfer mechanism 40 changes according to the movement by the moving mechanism 46. The change of the thermal resistance is realized not only by the change of the contact area, but also by the gap between the slide plate 44 of the heat transfer mechanism 40 and the fuel cell 12 or the fuel storage part 14 and the difference in the material and shape of each part.

(Second Embodiment)
The fuel cell system 10 according to the first embodiment includes the placement portion 42 on which the electronic device 100 is directly placed on the upper portion of the slide plate 44 of the heat transfer mechanism 40. In the present embodiment, A case where the electronic device 100 is in direct contact with the slide plate 44 will be described. In addition, the same code | symbol is attached | subjected about the structure similar to 1st Embodiment, and description is abbreviate | omitted suitably.

  FIG. 12 is a main part sectional view schematically showing a state immediately after the electronic device 100 is placed on the fixed part of the fuel cell system according to the second embodiment. In the fuel cell system 110 according to the present embodiment, since the electronic device 100 and the slide plate 44 are in direct contact, the heat generated in the electronic device 100 is more efficiently transmitted to the fuel cell 12 and the fuel storage unit 14. In addition, the fuel cell system 110 includes a fixing portion 114 provided with a recess so that the lower portion of the electronic device 100 can be accommodated in the upper portion of the housing 112. As a result, even if the slide plate 44 that is in direct contact with the lower surface of the electronic device 100 moves, the electronic device 100 does not move greatly, so that the operation of the electronic device 100 is not hindered.

(Third embodiment)
The fuel cell system according to each of the above-described embodiments includes one heat transfer mechanism and one moving mechanism. However, in this embodiment, the heat transfer mechanism and the moving mechanism are provided in each of the fuel cell and the fuel storage unit. A case in which is provided will be described. The fuel cell system according to the present embodiment has a configuration in which the electronic device is in direct contact with the slide plate as in the second embodiment, but includes the mounting portion described in the first embodiment. Also good. In addition, the same code | symbol is attached | subjected about the structure similar to each above-mentioned embodiment, and description is abbreviate | omitted suitably.

  FIG. 13 is a main part sectional view schematically showing a state immediately after the electronic device 100 is placed on the fixed part of the fuel cell system according to the third embodiment. The fuel cell system 210 according to the present embodiment includes two moving mechanisms 60 and 62 that independently move the two slide plates 56 and 58 included in the heat transfer mechanism 54.

  The moving mechanism 60 is slidably engaged with a groove provided on the upper surface of the fuel cell 12, is connected to a slide portion 64 fixed to the lower surface of the slide plate 56, and one end in the slide direction of the slide portion 64, and the temperature A shape memory alloy spring 66 that slides the slide portion 64 by expanding and contracting in accordance with the bias, and a bias spring 68 that is connected to the other end of the slide portion 64 in the sliding direction and biases the shape memory alloy spring 66 in a contracting direction, Have

  Further, the moving mechanism 62 is slidably engaged with a groove provided on the upper surface of the fuel accommodating portion 14, and is connected to a slide portion 70 fixed to the lower surface of the slide plate 58 and one end of the slide portion 70 in the sliding direction. The shape memory alloy spring 72 that slides the slide portion 70 by expanding and contracting according to the temperature, and the bias spring that is connected to the other end of the slide portion 70 in the sliding direction and biases the shape memory alloy spring 72 in the contracting direction. 74.

  The fuel cell system 210 in the state shown in FIG. 13 is in a state in which the slide plate 56 and the fuel cell 12 are in contact with or substantially opposed to each other, and the heat from the electronic device heat generating portion 100a of the electronic device 100 is transferred to the slide plate. 56 to the fuel cell 12. On the other hand, the slide plate 58 and the fuel storage portion 14 are in a state in which the end portions are slightly in contact with or opposed to each other, and the heat from the electronic device heat generating portion 100a of the electronic device 100 is transferred via the slide plate 58 to the fuel storage portion. 14 is not transmitted much.

  When the outside air is at a low temperature or when the fuel cell system 210 is started, the temperature of the fuel cell 12 tends to be lower than the optimum temperature for power generation, so that a large amount of heat from the electronic device 100 can be supplied to the fuel cell 12. desired. Therefore, by setting the position of the slide plate 56 at the start of the fuel cell system 210 to the position shown in FIG. 13, the area where the slide plate 56 and the fuel cell 12 are in contact for a while from the start is maximized. It becomes possible. As a result, the fuel cell 12 is efficiently heated by the heat of the electronic device 100.

  On the other hand, when the fuel cell system 10 is started, the temperature of the fuel cell 12 is low, so that the amount of power generation is small and the consumption of hydrogen as a fuel is also small. Therefore, there is little decrease in temperature due to the endothermic reaction in the fuel storage portion 14, and there is no need to promote the release of hydrogen by heating the hydrogen storage alloy filling portion 14a. Therefore, by setting the position of the slide plate 58 at the time of startup of the fuel cell system 10 to the position shown in FIG. 13, the area where the slide plate 58 and the fuel storage portion 14 are in contact with each other for a while from the startup is minimized. It becomes possible to do. As a result, the fuel container 14 is unnecessarily heated by the heat of the electronic device 100 and the pressure is suppressed from increasing. The partition portion 75 to which one end of each of the shape memory alloy spring 66 and the shape memory alloy spring 72 is connected is made of a heat insulating material so as not to transfer heat between the shape memory alloys.

  FIG. 14 is a cross-sectional view of a principal part schematically showing a state in which the slide plates 56 and 58 have moved from the state shown in FIG. In the fuel cell system 210, when a certain amount of time elapses from the startup, the temperature of the fuel cell 12 itself gradually increases due to the exothermic reaction in the cell 20 during power generation and the heat supplied from the electronic device 100. Therefore, the temperature of the shape memory alloy spring 66 is increased by the heat supplied from the fuel cell 12 through the slide portion 64, and the force for moving the slide portion 64 to the left in the figure increases. As a result, the slide plate 56 to which the slide portion 64 is fixed also moves to the left.

  In the state shown in FIG. 14, the slide plate 56 is in a position overlapping with about half of the upper surface of the fuel cell 12 when viewed from above, and the heat generated in the electronic device 100 is transferred via the slide plate 56 to the fuel cell 12. Is transmitted to. The fuel cell 12 generates more power as the temperature rises and consumes more hydrogen as a fuel. Therefore, it is necessary to increase the amount of released hydrogen supplied from the fuel storage unit 14 to the fuel cell 12.

  However, since the hydrogen storage alloy stored in the fuel storage unit 14 undergoes an endothermic reaction when releasing hydrogen supplied to the fuel cell 12, when no heat is supplied from the outside, the amount of hydrogen released decreases due to a decrease in temperature. Resulting in. As described above, since the fuel storage portion 14 is provided adjacent to the fuel cell 12, the heat of the fuel cell 12 is supplied to the fuel storage portion 14, but the temperature of the fuel cell 12 does not decrease. In order to achieve this, it is preferable to supply the heat of the electronic device 100 to the fuel storage unit 14.

  Therefore, as shown in FIG. 10, the fuel cell system 10 according to the present embodiment is configured such that the slide plate 58 moves to the upper surface of the fuel storage unit 14 as the temperature of the fuel storage unit 14 increases. . Specifically, in the fuel cell system 210, when a certain amount of time has elapsed since the start-up, the temperature of the fuel storage unit 14 gradually decreases due to an endothermic reaction accompanying the release of hydrogen. Therefore, the temperature of the shape memory alloy spring 72 is reduced when heat is absorbed by the fuel storage portion 14 via the slide portion 70, and the force for moving the slide portion 70 to the left in the figure increases. As a result, the slide plate 58 to which the slide unit 70 is fixed also moves to the left. In the state shown in FIG. 14, the slide plate 58 is in a position overlapping with more than half of the upper surface of the fuel storage portion 14 when viewed from above, and heat generated in the electronic device 100 is stored in the fuel via the slide plate 58. Is transmitted to the unit 14. Thereby, the temperature drop accompanying the discharge | release of hydrogen from the hydrogen storage alloy filling part 14a of the fuel accommodating part 14 is suppressed, and the stable electric power generation of the fuel cell 12 is attained.

  FIG. 15 is a cross-sectional view of a principal part schematically showing a state in which the slide plates 56 and 58 are further moved from the state shown in FIG. In the fuel cell system 10, when the temperature of the fuel cell 12 further rises from the state shown in FIG. 14, the slide plate 56 moves to the left in the drawing according to the temperature. When the temperature of the fuel cell 12 rises to an operating temperature suitable for power generation, the amount of power generation also increases and the amount of heat generated during the reaction also increases. Therefore, the power generation state is stable even when there is almost no heat supply from the electronic device 100. That is, the temperature suitable for power generation can be maintained. On the other hand, the fuel storage unit 14 needs to be further supplied with heat from the electronic device 100 because it needs to release more hydrogen as the power generation amount in the fuel cell 12 increases.

  Therefore, in the fuel cell system 10 according to the present embodiment, as shown in FIG. 15, when the temperature of the fuel cell 12 rises to an operating temperature suitable for power generation, most of the slide plate 56 is removed from the upper surface of the fuel cell 12. It is configured to evacuate. That is, the material and the spring constant of the shape memory alloy spring 66 and the bias spring 68 are set so that the slide part 64 moves to the left end in a temperature range suitable for the operation of the fuel cell 12. Thereby, the heat supplied from the electronic device 100 to the fuel cell 12 is minimized, and the temperature of the fuel cell 12 is prevented from rising more than necessary. In addition, as shown in FIG. 15, you may provide the thermal radiation part 76 which contacts when the slide board 56 moves to the left. The heat radiating portion 76 is preferably made of a material having a high thermal conductivity such as metal, and is preferably provided so as to be exposed on the surface of the housing 112 from the viewpoint of heat dissipation.

  On the other hand, as shown in FIG. 15, when the temperature of the fuel cell 12 rises to an operating temperature suitable for power generation, a decrease in the temperature of the fuel storage unit 14 is suppressed so that supply can catch up with the consumption of hydrogen in the fuel cell 12. Therefore, most of the slide plate 58 is configured to cover the upper surface of the fuel storage portion 14. As a result, the heat supplied from the electronic device 100 to the fuel storage unit 14 is maximized, the decrease in the amount of hydrogen released from the hydrogen storage alloy filling unit 14a of the fuel storage unit 14 is suppressed, and stable power generation of the fuel cell 12 is achieved. Can be continued.

  In the fuel cell system 210 according to the present embodiment, since the electronic device 100 and the slide plates 56 and 58 are in direct contact, the heat generated in the electronic device 100 is more efficiently transmitted to the fuel cell 12 and the fuel storage unit 14. The In addition, the fuel cell system 210 includes a fixing portion 114 provided with a recess so that the lower portion of the electronic device 100 is accommodated in the upper portion of the housing 112. As a result, even if the slide plates 56 and 58 that are in direct contact with the lower surface of the electronic device 100 move, the electronic device 100 does not move greatly, so that the operation of the electronic device 100 is not hindered.

  In addition, since the heat transfer mechanism 54 according to the present embodiment has a plurality of slide plates 56 and 58 that move independently by the heat of the fuel cell and the fuel storage portion, the fuel cell 12 and the fuel storage portion The supply of heat generated by the electronic equipment to 14 can be changed independently. That is, the control of the temperature of the fuel cell 12 and the fuel storage unit 14 using the heat generated by the electronic device 100 can be further optimized.

(Fourth embodiment)
In each of the above-described embodiments, the amount of heat exchange with the slide plate is mainly changed by changing the contact area mainly in the case where the upper portion of the fuel cell 12 and the fuel storage portion 14 is formed of a uniform material. The case of changing was explained. In the present embodiment, the thermal resistance between the components is locally changed by partially changing the thermal conductivity of the material in the region where the slide plate is in contact with the upper surface of the fuel cell 12 or the fuel accommodating portion 14. FIG. 16 is a side view schematically showing the contact state between the fuel cell and the slide plate, the upper surface of which is composed of a plurality of members having different thermal conductivities. FIG. 17 is a side view schematically showing a contact state between a fuel cell and a slide plate in which members having different thermal conductivities are attached to a part of the upper surface.

  As shown in FIG. 16, in the upper part of the fuel cell 12 in contact with the slide plate 44, a region 78 using copper or aluminum having a relatively high thermal conductivity and iron having a lower thermal conductivity than copper or aluminum are provided. The used region 80 is provided. As described above, by locally providing regions having different thermal conductivities, the rate of change in thermal resistance between components caused by the change in contact area between the slide plate 44 and the fuel cell 12 is greater than or equal to a predetermined contact area. It will change in some cases.

  Specifically, when the slide plate 44 shown in FIG. 16 slides to the right in the drawing by a moving mechanism (not shown), the thermal resistance decreases as the contact area with the region 78 increases, but the slide plate 44 As the region moves above the region 80, the rate of decrease in thermal resistance decreases. Further, when the slide plate 44 moves to the right, the area in contact with the region 78 starts to decrease, the area in contact with the region 80 increases, and the thermal resistance starts to increase.

  Eventually, the slide plate 44 comes into contact only with the region 80 having a relatively low thermal conductivity and the thermal resistance becomes high. For example, the temperature of the fuel cell 12 is sufficiently raised to a temperature suitable for power generation. In addition, when it is not necessary to supply heat generated in the electronic device to the fuel cell, the amount of heat exchange between the slide plate 44 and the fuel cell 12 can be suppressed. In some cases, the region 80 may be made of gold having a higher thermal conductivity than copper or aluminum to reduce the thermal resistance and increase the amount of heat exchange between the slide plate 44 and the fuel cell 12.

  As shown in FIG. 17, a part of the upper surface of the fuel cell 12 may be provided with a heat dissipation sheet 82 made of silicone gel or silicone rubber having a lower thermal conductivity than copper. Even in such a case, the same effects as the configuration shown in FIG. 16 can be obtained.

  FIG. 18 is a cross-sectional view schematically showing a fuel cell system in which a part of the upper portion of the fuel cell is made of materials having different thermal conductivities. FIG. 19 is a perspective view schematically showing a state in which the upper part of the fuel cell is exposed in the fuel cell system shown in FIG.

  In the fuel cell system 310, when the slide plate 44 is moved to the right end by the moving mechanism 46, the left end portion of the slide plate may slightly contact the upper surface of the fuel cell 12 as shown in FIG. Even in such a state, the heat from the electronic device heat generating portion 100a of the electronic device 100 is hardly transmitted to the fuel cell 12, but more preferably, the material of the region 80 (heat dissipating sheet 82) has a surrounding heat conduction. By using a battery having a rate lower than the rate, the temperature of the fuel cell 12 is prevented from rising more than necessary, and dryout is further suppressed.

(Fifth embodiment)
The fuel cell system according to the present embodiment can suppress the heat radiation of the fuel cell and the fuel storage portion in a state where no electronic device is placed. FIG. 20 is a main part sectional view schematically showing a state where no electronic device is placed on the placement part 142 of the fuel cell system 410 according to the fifth embodiment. In addition, the same code | symbol is attached | subjected about the structure similar to the fuel cell system 210 shown in FIG. 13, and description is abbreviate | omitted.

  The placement unit 142 according to the present embodiment is thermally connected to the slide plates 56 and 58 when the electronic device is placed, and the slide plates 56 and 58 when the electronic device is not placed. The thermal connection cancellation | release part which cancels | releases a thermal connection is provided. The thermal connection release unit according to the present embodiment is a spring member 146 provided between the fixing unit 144 and the mounting unit 142 that are fixed in contact with the upper surfaces of the slide plates 56 and 58. Thereby, in a state where the electronic device is mounted, the mounting member 142 sinks due to the spring member 146 contracting due to the weight of the electronic device, and comes into contact with the fixing portion 144. Thereby, the heat of an electronic device will be supplied to a fuel cell or a fuel accommodating part.

  On the other hand, in a state where the electronic device is not placed, the placement portion 142 and the fixing portion 144 are separated by the biasing force of the spring member 146, and the fuel cell and the fuel storage portion via the heat transfer mechanism and the electronic device are separated. Since transfer of heat is cut off, heat radiation to the outside through the heat transfer mechanism is prevented. Therefore, for example, since the temperature drop of the fuel cell once raised to an appropriate temperature is suppressed, sufficient power generation can be performed early even at the time of restart.

  As described above, the present invention has been described with reference to the above-described embodiments. However, the present invention is not limited to the above-described embodiments, and the configurations of the embodiments are appropriately combined or replaced. Those are also included in the present invention. In addition, modifications such as various design changes in the fuel cell and fuel cell system in each embodiment based on the knowledge of those skilled in the art can be added to each embodiment, and such modifications are added. The embodiments may be included in the scope of the present invention.

  For example, the slide part included in the moving mechanism plays a role of transmitting the heat of the fuel cell or the fuel storage part to the shape memory alloy spring, but if the heat is transferred to other than the shape memory alloy spring, the response of the shape memory alloy spring is reduced. There is a possibility of decline. Therefore, the configuration of the slide portion that transmits the heat of the fuel cell and the fuel storage portion to the shape memory alloy spring without escaping to the outside as much as possible will be described.

  FIG. 21 is a schematic sectional view of the vicinity of the moving mechanism. The slide portion 148 has a thermal resistance in a region 148a between the fuel cell 12 or the fuel storage portion 14 and the shape memory alloy spring 50, so that the fuel cell 12 or the fuel storage portion 14, the slide plate 56 (58) and the bias spring 52 It is comprised so that it may become smaller than the thermal resistance of the area | region 148b between. Thereby, the heat of the fuel cell 12 or the fuel storage portion 14 is efficiently transmitted to the shape memory alloy spring 50 via the slide portion 148, so that the accuracy and responsiveness of the movement of the slide plate 56 (58) are improved.

  DESCRIPTION OF SYMBOLS 10 Fuel cell system, 12 Fuel cell, 12a Groove part, 12b Guide groove, 14 Fuel accommodating part, 14a Hydrogen storage alloy filling part, 14b Guide groove, 14c groove part, 16 Supply path, 18 Regulator, 19 Housing | casing, 20 cell, 22 Fuel electrode, 24 Oxidant electrode, 26 Electrolyte membrane, 40 Heat transfer mechanism, 42 Placement part, 44 Slide plate, 44a Guide, 46 Moving mechanism, 48 Slide part, 50 Shape memory alloy spring, 52 Bias spring, 54 Heat transfer Mechanism, 56, 58 slide plate, 60, 62 moving mechanism, 64 slide part, 66 shape memory alloy spring, 68 bias spring, 70 slide part, 72 shape memory alloy spring, 74 bias spring, 75 partition part, 76 heat dissipation part, 100 electronics, 110 fuel Battery system, 112 housing, 114 fixing part, 142 mounting part, 144 fixing part, 146 spring member, 148 sliding part, 210, 310, 410 fuel cell system.

Claims (10)

A fuel cell;
A fuel storage portion storing a hydrogen storage alloy that stores hydrogen supplied to the fuel cell;
A heat transfer mechanism for transferring heat generated in an electronic device to which power generated by the fuel cell is supplied to the fuel cell and the fuel storage unit;
A moving mechanism for moving the heat transfer mechanism by the heat of the fuel cell or the fuel storage unit,
The fuel cell system, wherein the heat transfer mechanism is configured such that the amount of heat transferred to the fuel cell and the fuel storage portion changes according to movement by the moving mechanism.   2. The fuel cell system according to claim 1, wherein an area of the heat transfer mechanism overlapped with the fuel cell or the fuel storage portion is changed according to movement by the moving mechanism as viewed from above.   3. The heat transfer mechanism is moved by the moving mechanism so that an area overlapping with the fuel cell at the time of startup of the fuel cell decreases as the temperature of the fuel cell increases. The fuel cell system described in 1.   The heat transfer mechanism is configured such that a thermal resistance between the fuel cell or the fuel storage portion and the heat transfer mechanism changes according to movement by the moving mechanism. 2. The fuel cell system according to 1.   The fuel cell system according to any one of claims 1 to 4, wherein the fuel cell is adjacent to a position where heat exchange is possible with the fuel storage portion. It further includes a mounting portion that is fixed to the main body and on which the electronic device is mounted,
The heat transfer mechanism is
A slide plate that slides in a horizontal direction with respect to the lower surface of the mounting unit and transmits heat of the electronic device mounted on the mounting unit to the fuel cell or the fuel storage unit through the mounting unit. The fuel cell system according to claim 1, wherein the fuel cell system is provided.   The mounting portion thermally connects with the heat transfer mechanism when the electronic device is placed, and releases the thermal connection with the heat transfer mechanism when the electronic device is not placed. The fuel cell system according to claim 6, further comprising a thermal connection release unit that performs the operation. The moving mechanism is
A slide part slidably engaged with a groove provided on the upper surface of the fuel cell or the fuel storage part, and fixed to the lower surface of the heat transfer mechanism;
An expansion / contraction part that is connected to one end of the slide part in the sliding direction and slides the slide part by extending / contracting according to temperature,
8. The fuel cell system according to claim 1, further comprising: an urging portion that is connected to the other end of the sliding portion in the sliding direction and urges the extending portion in a contracting direction. 9.   In the slide portion, the thermal resistance between the fuel cell or the fuel storage portion and the expansion / contraction portion is greater than the thermal resistance between the fuel cell or the fuel storage portion and the heat transfer mechanism and the biasing portion. The fuel cell system according to claim 8, wherein the fuel cell system is configured to be small.   The fuel cell system according to any one of claims 1 to 9, wherein the heat transfer mechanism includes a plurality of moving members that move independently by heat of the fuel cell and the fuel storage portion.

Images