JP2014154431A - Load-applying device, and fuel cell stack with load-applying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a load-applying device capable of applying a load to a fuel cell stack by absorbing reduction deformation of a cell stack length, without using a spring, and to provide the fuel cell stack with the load-applying device.SOLUTION: A load-applying device 1 comprises: a stack case 10 for accommodating a cell stack 2; a pair of displacement following parts 11 which are provided oppositely to an upper end portion of the stack case 10, of which the proximal end side is mounted to the upper end portion in a vertically turnable manner and the distal end side is disposed towards the inside of the case; a suspension part 12 including a lower plate 121 suspended from a middle portion of the pair of displacement following parts 11 and an upper plate 123 placed in an upper portion of the cell stack 2; and a pressing plate 13 of which a top face is brought into contact with the displacement following parts 11 and a bottom face is brought into contact with the upper plate 123 inside of the case rather than a suspending position 120 of the suspension part 12. In a fuel cell stack 3 with the load-applying device, a load can be applied in a cell stacking direction by using the load-applying device 1.

Description

  The present invention relates to a load loading device and a fuel cell stack with a load loading device.

  Conventionally, a large number of fuel cell single cells each including a solid electrolyte layer, an anode layer provided on one side of the solid electrolyte layer, and a cathode layer provided on the other side of the solid electrolyte layer are stacked via separators. A fuel cell stack is known. The fuel cell stack is generally used in a state where a load is applied in the cell stacking direction.

  For example, Patent Document 1 discloses a fuel cell stack provided with a load application mechanism for applying a load in the cell stacking direction. This document describes a configuration in which a load is applied by a spring in order to follow a load variation that varies depending on the operating state of the fuel cell stack.

JP 2010-251111 A

  However, the conventional technology has room for improvement in the following points. That is, the fuel cell stack is normally sealed with a gas seal member so that gas such as fuel gas supplied to the single fuel cell does not leak to the outside. The gas seal member is hard at normal temperature and softens at high temperature. For this reason, when the fuel cell stack is assembled at room temperature, the gas seal member is hard, so that a gap is generated in the gas seal portion in the fuel cell stack. However, at a high temperature during battery operation, the gas seal member softens and deforms due to a load applied in the cell stacking direction. Therefore, the gap in the fuel cell stack generated during battery assembly is closed by the gas seal member.

  However, the gas seal member has a larger shrinkage rate than other members constituting the fuel cell stack. Therefore, as the number of stacked fuel cell stacks increases, the contraction displacement of the cell stack length increases when the gas seal member is softened. Therefore, in a conventional load application device using a spring or the like, there is a problem that the contraction displacement cannot be absorbed and the load applied to the fuel cell stack is lost. In addition, it is conceivable to increase the spring length in order to prevent the load from dropping out, but this is not realistic because the apparatus becomes complicated and large.

  The present invention has been made in view of the above-described background. A load-loading device capable of absorbing a contraction displacement of a cell stack length and loading a fuel cell stack without using a spring. It was obtained in an attempt to provide a fuel cell stack with a device.

According to one aspect of the present invention, a fuel cell single cell including a solid electrolyte layer, an anode layer provided on one surface of the solid electrolyte layer, and a cathode layer provided on the other surface of the solid electrolyte layer is interposed via a separator. Is a load loading device for applying a load in the cell stacking direction to the fuel cell stack including the gas seal portion by the gas seal member,
A stack case for housing the fuel cell stack;
The stack case is provided opposite to the upper end of the stack case, and has at least a pair of base ends attached to the upper end so as to be pivotable in the vertical direction and the tip end is disposed inward of the case. A displacement follower;
A lower plate that is hung from an intermediate portion of the displacement follower and on which the fuel cell stack is placed, and an upper plate that is placed on the upper portion of the fuel cell stack that is placed on the lower plate A hanging part comprising:
A pressure plate in which the upper surface is in contact with the displacement follower and the lower surface is in contact with the upper plate on the inner side of the case from the hanging position of the hanging portion;
(1).

  Another aspect of the present invention resides in a fuel cell stack with a load-loading device, characterized in that a load can be applied in the cell stacking direction using the load-loading device.

  The load load device has the above-described configuration. Therefore, when the fuel cell stack is placed on the lower plate of the hanging part, the own weight of the fuel cell stack is applied to the displacement following part via the hanging part. Here, the suspension part is suspended from the middle part of the displacement follow-up part. Moreover, the base end part of the displacement follow-up part is attached to the upper end part of the stack case. Further, the displacement follower and the upper surface of the pressure plate are in contact with each other on the inner side of the case from the hanging position of the hanging portion. For this reason, the self-weight applied to the displacement follower is distributed to the upper end of the stack case and the pressure plate. Then, the dead weight distributed to the pressure plate is loaded on the fuel cell stack via the pressure plate. In addition, when the cell stack length is reduced as compared with the battery assembly due to the high temperature during battery operation, the pressure plate and the upper plate move downward. At this time, along with the downward movement, the displacement follower can also follow and rotate downward with the base end side as a base point. Therefore, even in such a case, the self-weight applied to the pressure plate from the displacement follower is loaded on the fuel cell stack via the pressure plate.

  In addition, the fuel cell stack with the load load device is capable of applying a load in the cell stacking direction using the load load device, and therefore absorbs the contraction displacement of the cell stack length without using a spring. Thus, a load can be applied to the fuel cell stack.

  Therefore, according to the present invention, without using a spring, a load loading device capable of absorbing the contraction displacement of the cell stack length and loading the fuel cell stack with the load loading device using the load loading device is provided. A fuel cell stack can be provided.

It is the front view which showed typically the load cell of Example 1, and the fuel cell stack with a load cell. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a left side view schematically showing a load load device and a fuel cell stack with a load load device of Example 1 (the right side view is the same as the left side view and is omitted). 1 is a plan view schematically showing a load loading device and a fuel cell stack with a load loading device of Example 1. FIG. It is the perspective view which took out the fuel cell single cell and the upper and lower separators which clamp this from the fuel cell stack to which the load application apparatus of Example 1 is applied, and showed typically. FIG. 5 is an exploded perspective view of FIG. 4. It is sectional drawing which showed typically the VI-VI line cross section in FIG. It is sectional drawing which showed typically the VII-VII line cross section in FIG. It is the figure which showed a mode that the load was loaded with respect to the fuel cell stack by absorbing the shrinkage | contraction displacement of cell stack length, (a) is when the cell stack length is L, (b) Indicates a state when the cell stack length is L ′ (where L ′ <L). When A = 20 mm and B = 20 mm in FIG. 8, the angle θ (°) formed between the longitudinal direction of the displacement follower and the horizontal direction and the shrinkage displacement LL ′ (mm) of the cell stack length. It is a graph which shows the result of having simulated the relationship. When A = 20 mm and B = 20 mm in FIG. 8, the angle θ (°) formed between the longitudinal direction and the horizontal direction of the displacement follower and the load coefficient of the load applied to the pressure plate with respect to its own weight It is a graph which shows the result of having simulated the relationship. FIG. 6 is a front view schematically showing a load loading device and a fuel cell stack with a load loading device of Example 2.

  In the load loading device, the fuel cell stack includes a gas seal portion by a gas seal member. Examples of the gas seal member include a glass seal material. The fuel cell stack can have a gap formed by the gas seal material in the cell stacking direction after battery assembly.

  In the load application device, the pressure plate and the upper plate can be configured to contact each other at the center.

  In this case, there is a difference in the softening speed of the gas seal member depending on the thickness of the gas seal member and the temperature distribution of the fuel cell stack, and as a result, the parallelism of the fuel cell single cell and the separator is disturbed and tilted. Even if it exists, the center part of an upper plate is pressurized by the center part of a pressurization plate. For this reason, in this case, it is difficult for a load to be applied in a state where the upper plate comes into contact with the fuel cell stack, and pressurization can be performed while absorbing the inclination.

  In the load application device, the pressure plate may be configured to include a hemispherical protrusion on the lower surface for contacting the upper plate.

  In this case, since the tip of the hemispherical protrusion can be brought into point contact with the upper plate, the upper plate can be pressed relatively uniformly even when the above-described inclination occurs in the fuel cell stack. Preferably, the pressure plate can be configured to have a hemispherical protrusion for contacting the central portion of the upper plate at the central portion of the lower surface. In this case, it is advantageous to perform uniform pressurization that absorbs the inclination.

  The load load device may include two pairs of the displacement followers (claim 4).

  In this case, the lower plate of the suspension part can be suspended from the two pairs of displacement followers. Therefore, in this case, the balance when applying a load to the fuel cell stack is excellent. Further, the load can be applied to the upper plate in a balanced manner through the pressure plate by the two pairs of displacement followers.

  In the load loading device, the displacement follower includes a long hole in the middle thereof, and the suspension part further includes a pair of through shafts that penetrate the long holes of the adjacent displacement followers, An upper end is connected to each end of each of the through shafts, and four hanging shafts having lower ends fixed to the lower plate can be provided.

  In this case, when the fuel cell stack is placed on the lower plate of the suspension part, the weight of the fuel cell stack can be applied to the two pairs of displacement followers via the suspension shaft. Therefore, in this case, it is possible to obtain a load loading device that can absorb the contraction displacement of the cell stack length and load the fuel cell stack with a relatively simple configuration. Further, since it is not necessary to increase the spring length in order to absorb the contraction displacement of the cell stack length as in the prior art, there is an advantage that the device can be easily downsized.

  In this case, the load load device is designed so that the angle θ formed between the longitudinal direction and the horizontal direction of the displacement follow-up portion in a state where the assembled fuel cell stack is assembled to the load load device, It can be configured to be 0 ° or more and less than 90 °. Preferably, the angle θ formed can be configured to be greater than 0 ° and less than 90 ° from the viewpoint of manufacturability and the like. The angle θ formed above can be selected in an appropriate range in consideration of the A: B ratio described later.

  In the load application device, the four suspension shafts may be provided so as to penetrate the pressure plate, the upper plate, and the fuel cell stack.

  In this case, it becomes easy to suppress the lateral shift of the fuel cell stack. Moreover, since it is easy to suppress the lateral displacement of the pressure plate, it is possible to contribute to uniform pressure. Further, the four suspension shafts can be disposed at the four corners of the pressure plate, the upper plate, and the fuel cell stack.

  The load load device can arbitrarily combine the above-described configurations, and the fuel cell stack with the load load device can be any load load device in which the above-described configurations are arbitrarily combined. It is possible to use.

  Hereinafter, a load loading device and a fuel cell stack with a load loading device of an embodiment will be described with reference to the drawings. It is assumed that the vertical direction is downward, the direction opposite to the vertical direction is upward, and the direction perpendicular to the vertical direction is horizontal. The same members will be described using the same reference numerals.

Example 1
The load loading device of Example 1 and the fuel cell stack with the load loading device will be described with reference to FIGS. As shown in FIGS. 1 to 7, the load application device 1 is for applying a compressive load to the fuel cell stack 2 in the cell stacking direction. Further, the fuel cell stack 3 with a load loading device can be loaded with a compressive load in the cell stacking direction using the load loading device 1.

As shown in FIGS. 4 and 5, the fuel cell stack 2 includes a large number of fuel cell single cells 20 stacked via separators 23, and includes a gas seal portion 25 by a gas seal member 24. The unit cell 20 includes a solid electrolyte layer 21, an anode layer 22 a provided on one surface of the solid electrolyte layer 21, and a cathode layer 22 c provided on the other surface of the solid electrolyte layer 21. In this example, the solid electrolyte layer 21 is formed in a plate shape from yttria-stabilized zirconia (hereinafter, 8YSZ) containing 8 mol% of Y ₂ O ₃ which is a zirconium oxide-based oxide. The thickness of the solid electrolyte layer 21 is not limited, but can be about 10 μm, for example. The solid electrolyte layer 21 has a plurality of communication holes 210 for allowing a gas to flow in the cell stacking direction outside the formation region of the anode layer 22a and the cathode layer 22c. Specifically, the communication hole 210 includes a first communication hole 211, a second communication hole 212, a third communication hole 213, and a fourth communication hole 214. The first communication hole 211, the second communication hole 212, the third communication hole 213, and the fourth communication hole 214 are disposed adjacent to each other, and the first communication hole 211, the fourth communication hole 214, and the second communication hole. The hole 212 and the third communication hole 213 are arranged to face each other. In this example, the anode layer 22a is formed of cermet of Ni and 8YSZ. The thickness of the anode layer 22a is not limited, but can be about 50 μm, for example. The cathode layer 22c is made of La _0.6 Sr _0.4 Co _0.2 Fe _0.8 (hereinafter referred to as LSCF). The thickness of the cathode layer 22c is not limited, but can be about 800 μm, for example. As can be seen from the above material configuration, the fuel cell in this example is a solid oxide fuel cell using solid oxide ceramics as a solid electrolyte. Hydrogen is used as the fuel gas supplied to the anode layer 22a, and air is used as the oxidant gas supplied to the cathode layer 22c.

  Specifically, the separator 23 has a gas flow path 231 through which a gas such as a fuel gas or an oxidant gas can be circulated. More specifically, the separator 23 is made of ferritic stainless steel and has a gas flow path 231 on one surface. The separators 23 are alternately arranged such that the formation surface side of the gas flow path 231 faces the single fuel cell 20 side. One end of the gas flow path 231 is communicated with a gas introduction hole 232 for introducing gas, and the other end of the gas flow path 231 is a gas lead-out hole 233 for deriving the gas that has flowed through the gas flow path 231. It is communicated to. A gas introduction hole side circulation hole 234 and a gas introduction hole side circulation hole 235 are formed adjacent to the gas introduction hole 232 and the gas introduction hole 233 around the gas introduction hole 232 and the gas extraction hole 233, respectively. . As shown in FIG. 5, when the separator 23 is laminated on the anode layer 22a side of the fuel cell single cell 20, each of these holes has a gas introduction hole 232, a first communication hole 211, and a gas introduction hole side circulation hole 234. The second through hole 212, the gas outlet hole 233 and the third communication hole 213, and the gas outlet hole side through hole 235 and the fourth through hole 214 are arranged coaxially. Further, when the separator 23 is laminated on the cathode layer 22 c side of the fuel cell single cell 20, the gas introduction hole 232 and the second communication hole 212, the gas introduction hole side circulation hole 234 and the first circulation hole 211, and the gas outlet hole 233. The fourth communication hole 214, the gas outlet hole side circulation hole 235, and the third circulation hole 213 are arranged so as to be coaxial with each other.

  The gas seal member 24 is for gas sealing so that at least fuel gas supplied to the anode layer 22a of the fuel cell single cell 20 does not leak to the outside. In this example, the gas is sealed so that the oxidant gas supplied to the cathode layer 22c of the single fuel cell 20 is not leaked together. Specifically, as shown in FIGS. 4 and 5, the gas seal portion 25 by the gas seal member 24 includes a gas flow path 231, a gas introduction hole 232, a gas outlet hole 233, a gas introduction hole side circulation hole 234, and a gas. It is provided so as to surround the outer periphery of the outlet hole side circulation hole 235. Moreover, the gas seal member 24 is specifically a glass seal material, and is arranged in a state of protruding from a groove portion 251 formed so as to surround the outer periphery as shown in FIGS. 6 and 7. Therefore, the fuel cell stack 2 of the present example has a gap formed by the gas seal member 24 between the fuel cell single cell 20 and the separator 23, between adjacent separators 23, etc. after battery assembly at room temperature. 26 occurs in the cell stacking direction.

  The load application device 1 includes a stack case 10, at least a pair of displacement follow-up portions 11, a suspension portion 12, and a pressure plate 13.

  The stack case 10 is for housing the fuel cell stack 2. In this example, specifically, the stack case 10 includes a bottom plate portion 101 and a pair of side plate portions 102 that extend upward from both edge portions of the bottom plate portion 101. The side plate portion 102 has a pair of support portions 103 protruding upward from both edge portions of the upper end edge. A connecting shaft 104 that connects the support portions 103 is provided between the support portions 103. Both ends of the connecting shaft 104 are fixed by nut members 105 through the support portion 103. The stack case 10 is not particularly limited as long as the fuel cell stack 2 can be accommodated. For example, the stack case 10 can be formed in a substantially rectangular parallelepiped shape by a frame member.

  As shown in FIGS. 1 to 3, the load application device 1 of this example includes two pairs of displacement follow-up portions 11. In each pair, the displacement follower 11 that forms the pair is provided opposite to the upper end of the stack case 10, and the base end side is at the upper end of the stack case 10 so as to be able to rotate in the vertical direction. It is attached and the tip side is arranged toward the inside of the case. In this example, the two pairs of displacement followers 11 are spaced apart from each other. Further, the base end side of each displacement follower 11 is penetrated by a connecting shaft 104 provided at the upper end of the stack case 10. Thereby, each displacement follower 11 can be rotated in the vertical direction with the connecting shaft 104 as a fulcrum. Each displacement follower 11 has a plate shape, and has a long hole 110 at an intermediate position on the plate surface. The longitudinal direction of the long hole 110 matches the longitudinal direction of the displacement follower 11. is there. Further, in this example, in the state where the assembled fuel cell stack 2 (before the gas seal member 24 is softened) is assembled to the load device 1 in design, the longitudinal direction and the horizontal direction of the displacement follower 11 are The angle θ formed between them (see FIG. 8B) is configured to be approximately 0 °.

  The suspension part 12 is suspended from the middle part of the displacement follower part 11, and includes a lower plate 121 for placing the fuel cell stack 2, and a fuel cell stack 2 placed on the lower plate 121. And an upper plate 123 placed on the upper portion. In this example, specifically, the suspension part 12 further includes a pair of penetration shafts 124 penetrating the elongated holes 110 of the adjacent displacement follower parts 11 and upper ends at both ends of the pair of penetration shafts 124. And four suspension shafts 126 having lower ends fixed to the lower plate 121. Further, the upper end portion of the suspension shaft 126 is penetrated through the through holes of the flat plate portion 125 formed at both ends of the through shaft 124, and the upper end portion penetrated is fixed by the nut member 127. On the other hand, the lower end portion of the suspension shaft 126 is screwed into female screw holes 122 formed at the four corners of the lower plate 121. The four suspension shafts 126 are disposed at the four corners of the pressure plate 13, the upper plate 123, and the fuel cell stack 2.

  When the fuel cell stack 2 is placed on the lower plate 121 in the suspension part 12, the pressure plate 13 is moved to the displacement follower 11 on the inner side of the case from the suspension position 120 of the suspension part 12. The upper surface is in contact with the upper plate 123 and the lower surface is in contact with the upper plate 123. In this example, the pressure plate 13 includes a hemispherical protrusion 130 on the lower surface for contacting the upper plate 123. And the pressurization plate 13 and the upper plate 123 are comprised so that a point contact may contact | connect in the center part of each other.

  In this example, the shaft through holes 14 are provided along the cell stacking direction at the four corners of the outer periphery of the pressure plate 13, the upper plate 123, and the fuel cell stack 2. The four suspension shafts 126 are configured to penetrate the pressure plate 13, the upper plate 123, and the fuel cell stack 2 by penetrating the shaft through holes 14.

  The fuel cell stack 3 with a load loading device can be applied with a compressive load in the cell stacking direction of the fuel cell stack 2 using the load loading device 1 described above.

  Next, the effects of the load loading device and the fuel cell stack with the load loading device of this example will be described.

  The load application device 1 has the above configuration. Therefore, as shown in FIG. 8A, when the fuel cell stack 2 having the cell stack length L after battery assembly is placed on the lower plate 121 of the hanging portion 12, the fuel cell stack A self weight of 2 is applied to the displacement follower 11 via the suspension part 12. Here, the suspension part 12 is suspended from a midway part of the displacement follow-up part 11. Further, the base end portion of the displacement follower 11 is attached to the upper end portion of the stack case 10. Further, the displacement follower 11 and the upper surface of the pressure plate 13 are in contact with each other on the inner side of the case with respect to the hanging position 120 of the hanging part 12. Therefore, the self-weight applied to the displacement follower 11 is distributed to the upper end of the stack case 10 and the pressure plate 13. The dead weight distributed to the pressure plate 13 is loaded on the fuel cell stack 2 through the pressure plate 13. Further, as shown in FIG. 8 (b), when the cell stack length is shortened compared with the battery assembly due to the high temperature during battery operation and the cell stack length becomes L ′ smaller than L, pressurization is performed. The plate 13 and the upper plate 123 move downward. At this time, along with the downward movement, the displacement follower 11 can also follow by pivoting downward from the base end side. Therefore, even in such a case, the self-weight applied to the pressure plate 13 from the displacement follower 11 is loaded on the fuel cell stack 2 via the pressure plate 13. In the case of this example, as shown in FIG. 8B, the distance between the connecting shaft 104 and the hanging position 120 of the hanging part 12 is A, the contact between the displacement follower 11 and the pressure plate 13 and Assuming that the distance from the suspension position 120 is B and the weight of the fuel cell stack 2 is P, the load at each contact point between the displacement follower 11 and the pressure plate 13 is supported at four points in this example. Therefore, (P × A) / {4 × (A + B)}. When the number of supporting points is different from this example, the load per location can be obtained by dividing by the number of supporting points. In this example, the dimensional ratio of A: B in the displacement follower 11 is about 1: 2.

  Here, for example, when A = 20 mm and B = 20 mm, the angle θ (°) formed between the longitudinal direction and the horizontal direction of the displacement follower 11 and the contraction displacement L−L of the cell stack length. The result of simulating the relationship with '(mm) is shown in FIG. Moreover, the result of simulating the relationship between the angle θ (°) formed above and the load coefficient of the load applied to the pressure plate 13 with respect to its own weight is shown in FIG. As a result, as shown in FIG. 8, the shrinkage displacement increases as the formed angle θ increases, but even when the formed angle θ increases and the shrinkage displacement increases as shown in FIG. It can be seen that pressure can be applied to the upper plate 123 via the pressure plate 13 by its own weight.

  In addition, the load loading device 1 includes a hemispherical protrusion 130 for bringing the pressure plate 13 into contact with the center of the upper plate 123 at the center of the lower surface. Are in contact with each other through a hemispherical protrusion 130 at the center of each other. Therefore, the load application device 1 has a difference in the softening speed of the gas seal member 24 depending on the thickness of the gas seal member 24 and the temperature distribution of the fuel cell stack 2. As a result, the parallelism of the fuel cell single cell 20 and the separator 23 is different. Even when the inclination is disturbed and the inclination occurs, the central portion of the upper plate 123 is pressurized by the central portion of the pressure plate 13. In particular, since the tip of the hemispherical protrusion 130 can be brought into point contact with the upper plate 123, the upper plate 123 can be pressed relatively uniformly even when the above-described inclination occurs in the fuel cell stack 2. . Therefore, the load application device 1 is less likely to be loaded with the upper plate 123 in one-side contact with the fuel cell stack 2, and can absorb the inclination and perform uniform pressurization.

  The load application device 1 has two pairs of displacement followers 11 and can suspend the lower plate 121 of the suspension part 12 from the two pairs of displacement followers 11. Therefore, the load application device 1 is excellent in balance when a load is applied to the fuel cell stack 2. Moreover, the load can be applied to the upper plate 123 through the pressure plate 13 by the two pairs of displacement followers 11 in a balanced manner.

  Further, in the load application device 1, each displacement follower 11 is provided with a long hole 110 in the middle thereof, and the hanging part 12 further penetrates the long hole 110 of each adjacent displacement follower 11. A pair of penetrating shafts 124 and upper ends of the pair of penetrating shafts 124 are connected to each other, and four suspension shafts 126 having lower ends fixed to the lower plate 121 are provided. ing. Therefore, when the fuel cell stack 2 is placed on the lower plate 121 of the suspending unit 12, the load loading device 1 uses the two weights of the fuel cell stack 2 through the suspension shaft 126. It can be added to the displacement follower 11. Therefore, in this case, it is possible to obtain the load loading device 1 that can absorb the contraction displacement of the cell stack length and load the fuel cell stack 2 with a relatively simple configuration. Further, since it is not necessary to increase the spring length in order to absorb the contraction displacement of the cell stack length as in the prior art, there is an advantage that the device can be easily downsized.

  Further, the load loading device 1 is provided such that four suspension shafts 126 penetrate the pressure plate 13, the upper plate 123, and the fuel cell stack 2. Therefore, the load application device 1 can easily suppress the lateral displacement of the fuel cell stack 2. Moreover, since the lateral displacement of the pressure plate 13 is easily suppressed, it is possible to contribute to uniform pressure.

  Since the fuel cell stack 3 with a load load device can be loaded in the cell stacking direction using the load load device 1, the fuel cell stack 3 absorbs the contraction displacement of the cell stack length without using a spring to A load can be applied to the battery cell stack 2.

(Example 2)
The load loading device of Example 2 and the fuel cell stack with the load loading device will be described with reference to FIG. As shown in FIG. 11, the load load device 1 of the present example is designed so that the longitudinal direction and the horizontal direction of the displacement follower 11 are in a state where the assembled fuel cell stack 2 is assembled to the load load device 1. The load applied in the first embodiment is that the angle θ between them is greater than 0 ° and less than 90 °, and the A: B dimension ratio in the displacement follower 11 is about 1: 1. Different from the device 1. In addition, the fuel cell stack 3 with the load loading device of Example 2 is implemented in that a load can be applied in the cell stacking direction of the fuel cell stack 2 using the load loading device 1 of Example 2. This is different from the fuel cell stack 3 with the load application device of Example 1. Since other configurations are the same as those of the first embodiment, the description of the first embodiment is applied mutatis mutandis.

  The load load device 1 and the fuel cell stack 3 with a load load device of the second embodiment can achieve the same effects as the load load device 1 and the fuel cell stack 3 with a load load device of the first embodiment.

  As mentioned above, although the Example of this invention was described in detail, this invention is not limited to the said Example, A various change is possible within the range which does not impair the meaning of this invention.

DESCRIPTION OF SYMBOLS 1 Load loading apparatus 2 Fuel cell stack 20 Fuel cell single cell 21 Solid electrolyte layer 22a Anode layer 22c Cathode layer 23 Separator 24 Gas seal member 25 Gas seal part 10 Stack case 11 Displacement follow-up part 12 Suspension part 121 Lower plate 123 Upper part Plate 13 Pressure plate 3 Fuel cell stack with load device

Claims (7)

A solid electrolyte layer (21); an anode layer (22a) provided on one surface of the solid electrolyte layer (21); and a cathode layer (22c) provided on the other surface of the solid electrolyte layer (21). A large number of fuel cell single cells (20) are stacked via separators (23), and in the cell stacking direction with respect to the fuel cell stack (2) including the gas seal portion (25) by the gas seal member (24). A load loading device (1) for applying a load,
A stack case (10) for accommodating the fuel cell stack (2);
The stack case (10) is provided so as to face the upper end of the stack case (10). The base end is attached to the upper end so as to be rotatable in the vertical direction, and the front end is disposed toward the inside of the case. At least a pair of displacement followers (11);
A lower plate (121) for suspending the fuel cell stack (2) and the fuel mounted on the lower plate (121) are suspended from a middle portion of the displacement follower (11). A suspension part (12) comprising an upper plate (123) placed on top of the battery cell stack (2);
A pressure plate (13) whose upper surface is in contact with the displacement follower (11) on the inner side of the case with respect to the suspension position (120) of the suspension (12) and whose lower surface is in contact with the upper plate (123). )When,
A load device (1) characterized by comprising: In the load device (1) according to claim 1,
The load application device (1), wherein the pressure plate (13) and the upper plate (123) are configured to contact each other at the center. The load device (1) according to claim 1 or 2,
The load applying device (1), wherein the pressure plate (13) includes a hemispherical projection (130) on the lower surface for contacting the upper plate (123). In the load application apparatus (1) according to any one of claims 1 to 3,
A load device (1) having two pairs of the displacement followers (11). In the load device (1) according to claim 4,
The displacement follower (11) is provided with a long hole (110) in the middle part thereof,
The suspension part (12) further includes a pair of penetration shafts (124) penetrating the elongated holes (110) of the adjacent displacement follower parts (11), and both ends of the penetration shafts (124). A load loading device (1) characterized in that the upper end portion is coupled to the lower plate (4) and the four lower shafts (126) are fixed to the lower plate (121). In the load device (1) according to claim 5,
The four suspension shafts (126) are provided so as to penetrate the pressure plate (13), the upper plate (123), and the fuel cell stack (2). Load device (1).   A fuel cell stack (3) with a load-loading device, wherein a load can be applied in the cell stacking direction using the load-loading device (1) according to any one of claims 1 to 6. .

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