JP2014041702A - Inspection apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve maintainability, while facilitating carrying-in and carrying-out of unit cells into and out of an inspection apparatus.SOLUTION: An inspection apparatus comprises a plurality of intermediate plates, a shaft, a fastening device, and a power generation evaluation device. The intermediate plates sandwich one unit cell therebetween so as to hold the plurality of unit cells. The shaft penetrates the plurality of intermediate plates and guides the movement of the intermediate plates. The fastening device holds and releases the unit cells by causing the plurality of intermediate plates to move along the shaft. The power generation evaluation device is connected to the unit cells and evaluates power generation properties of the unit cells. Each of the intermediate plates is formed in such a manner that a portion through which the shaft penetrates and a portion for sandwiching the unit cell are separably fixed to each other.

Description

  The present invention relates to inspection of a fuel cell.

  A fuel cell inspection apparatus is known (Patent Document 1). In this inspection apparatus, a current collector plate is disposed on a first end plate, a plurality of single cells are disposed on the current collector plate to form a stack, and the stack is pressed by a pressure cylinder.

JP 2008-84839 A

  The conventional inspection apparatus stacks the single cells upward along the guide member, and does not consider the ease of carrying in and out of the single cells. In addition, in the fuel cell inspection apparatus, it has been desired to facilitate the maintenance of the apparatus, shorten the inspection time, reduce the cost, facilitate the inspection, and improve the usability.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms.

  An inspection device that performs power generation inspection of a single cell of a fuel cell, and includes a plurality of intermediate plates, a shaft, a fastening device, and a power generation evaluation device. The intermediate plate holds a plurality of single cells by sandwiching the single cells one by one. The shaft passes through the plurality of intermediate plates and guides the movement of the intermediate plates. The fastening device holds the single cell and releases the holding by moving the plurality of intermediate plates along the shaft. The power generation evaluation device is connected to the single cell and evaluates the power generation characteristics of the single cell. The intermediate plate is formed by fixing a portion through which the shaft passes and a portion sandwiching the single cell so that they can be separated. According to this inspection apparatus, since the plurality of single cells are separated and held by the intermediate plate, it is possible to easily carry in and carry out the single cells in a state where the holding is released. Moreover, the part which pinches | interposes the single cell of an intermediate plate can be attached or detached one by one, without removing the whole intermediate plate from the shaft. Therefore, the maintenance of the portion sandwiching the single cell of the intermediate plate is facilitated. The present invention can be realized in various forms other than the above. For example, it can be realized in the form of a fuel cell inspection method.

  In addition, the following modes can be considered. A portion sandwiching the single cell includes a flow path of a reaction gas in power generation of the fuel cell and / or a flow path of cooling water for cooling the single cell. According to this aspect, maintenance can be performed only by removing only the portion sandwiching the single cell. This is because the members necessary for maintenance are concentrated on the portion sandwiching the single cell.

The figure which shows the state before the fastening of an inspection apparatus. The figure which shows the state after the fastening of an inspection apparatus. The enlarged view of the intermediate | middle board vicinity. The figure which shows an intermediate | middle board. The figure which shows the process of fastening cancellation | release. The figure which shows the process of fastening. The figure which shows an effect.

  FIG. 1 shows a state before fastening of the inspection apparatus 10 according to the present embodiment. The inspection device 10 includes an intermediate plate 100, a first end plate 110, a second end plate 120, a fastening device 115, a first shaft 130, a second shaft 132, and a first link plate. 160, a second link plate 165, a first bolt 170, a second bolt 175, a first insulating plate 180, and a second insulating plate 190. There are a plurality of intermediate plates 100 arranged in a horizontal arrangement direction. A single cell 200 is inserted between two adjacent intermediate plates 100. The single cell 200 has a membrane electrode assembly, a gas diffusion layer, and a separator plate.

  A first end plate 110 is disposed outside the outermost intermediate plate 100 via a first insulating plate 180, and a second end plate 120 is disposed via a second insulating plate 190, respectively. The In the present embodiment, the outermost intermediate plate 100 and the first end plate 110 are connected to each other by a link mechanism described later, but may be connected by other mechanisms. The same applies to the other outermost intermediate plate 100 and the second end plate 120.

  Four first shafts 130 and two second shafts 132 are connected to the second end plate 120. The first shaft 130 and the second shaft 132 penetrate the second insulating plate 190, the plurality of intermediate plates 100, and the first insulating plate 180. Each of the four first shafts 130 passes through one of the four corners of the intermediate plate 100. The through hole 108 (see FIG. 4) through which the first shaft 130 penetrates the intermediate plate 100 is arranged so that the first shaft 130 does not get in the way when the single cell 200 is carried in and out. Specifically, the interval in the width direction (the direction perpendicular to the vertical direction and the arrangement direction) of the first shaft 130 is larger than the size in the width direction of the single cell 200. Note that the vertical interval between the first shafts 130 may be greater than or equal to the vertical size of the single cell 200 or less than the vertical size of the single cell 200. This is because the single cell 200 can be attached to and detached from the inspection apparatus 10 by lifting the single cell 200 in the vertical direction. Moreover, it is preferable that the 1st shaft 130 has insulation. The second shaft 132 supports the single cell 200 from below. Therefore, the distance between the two second shafts 132 is preferably smaller than the size of the single cell 200 in the width direction so that the second shaft 132 can support the single cell 200. In addition, it is preferable that the 2nd shaft 132 also has insulation.

  A fastening device 115 is provided outside the first end plate 110 to press and fasten the intermediate plate 100 and the single cell 200. In this specification, “fastening” means that the first end plate 110 is pressed toward the second end plate 120 by the fastening device 115 in a state where the single cell 200 is sandwiched between the intermediate plates 100.

  A first link plate 160 and a second link plate 165 are connected to the intermediate plate 100. The first link plate 160 and the second link plate 165 are alternately arranged in series. One end of the first link plate 160 and one end of the second link plate 165 are attached to the intermediate plate 100 with a first bolt 170. In FIG. 1, the second link plate 165 is hatched in order to distinguish the first link plate 160 and the second link plate 165. The first link plate 160 and the second link plate 165 are rotatable around the first bolt 170, respectively. The other end of the first link plate 160 and the other end of the second link plate 165 are joined to each other by a second bolt 175. The second bolt 175 only joins the other end of the first link plate 160 and the other end of the second link plate 165, and does not join the other members. Each of the first link plate 160 and the second link plate 165 can rotate around the second bolt 175. The interval between the first bolt 170 and the second bolt 175 of the first link plate 160 and the interval between the first bolt 170 and the second bolt 175 of the second link plate 165 are equal to each other. In addition, since one set of the 1st link board 160 and the 2nd link board 165 has connected the two intermediate | middle board 100, it is preferable to have insulation. For example, the first link plate 160 and the second link plate 165 may be formed of an insulating material, or may be covered with insulation.

  The intermediate plate 100 includes through-holes 101 to 104, a cooling water channel 105, and a through-hole (see FIG. 4) that allows the first shaft 130 and the second shaft 132 to pass therethrough. The through holes 101 to 104 connect two surfaces (100a, 100b, see FIG. 3) in contact with the single cell 200. The cooling water channel 105 is formed in parallel with the surface in contact with the single cell 200. Similarly, the second end plate 120 is also provided with through holes 121 to 124, and the second insulating plate 190 is also provided with through holes 191 to 194. In a state where the intermediate plate 100 and the single cell 200 are fastened, the through hole 101 of the intermediate plate 100, the through hole 191 of the second insulating plate 190, and the through hole 121 of the second end plate are in communication with each other and the fuel gas Form a supply manifold. The through hole 102 of the intermediate plate 100, the through hole 192 of the second insulating plate 190, and the through hole 122 of the second end plate 120 communicate with each other to form an oxidizing gas supply manifold. The through hole 103 of the intermediate plate 100, the through hole 193 of the second insulating plate 190, and the through hole 123 of the second end plate 120 communicate with each other to form a fuel gas discharge manifold. The through hole 104 of the intermediate plate 100, the through hole 194 of the second insulating plate 190, and the through hole 124 of the second end plate 120 communicate with each other to form an oxidizing gas discharge manifold. As described above, the supply and discharge of the fuel gas and the oxidant gas using the fuel gas supply manifold, the oxidant gas supply manifold, the fuel gas discharge manifold, and the oxidant gas discharge manifold penetrating the intermediate plate 100 are performed in the actual use state. This is for simulating the method of supplying and discharging the fuel gas and the oxidizing gas of the fuel cell.

  The cooling water channel 105 is provided for cooling the single cell 200. As will be described later, the cooling water is supplied to the cooling water flow path 105 of each intermediate plate 100 via an external pipe. The reason why the cooling water channel 105 is provided in the intermediate plate 100 is to prevent the single cell 200 from being wetted by the cooling water when the fastening is released. When the unit cell 200 gets wet, it is necessary to remove moisture adhering to the unit cell 200 by wiping work. When the inspection device 10 inspects the single cell 200, the inspector performs fastening and unfastening of the intermediate plate 100 and the single cell 200 every time the inspection is completed. It leads to increase. In this embodiment, since the cooling water passes through the inside of the intermediate plate 100, even if the inspector releases the fastening of the intermediate plate 100 and the single cell 200 after the inspection, the cooling water does not leak, and the single cell 200 is cooled. Does not get wet with water. Therefore, no wiping work is required, and the inspection time can be shortened.

  FIG. 2 shows a state after the inspection apparatus 10 is fastened. FIG. 2 includes an illustration of peripheral devices not shown in FIG. The inspection device 10 further includes a fuel tank 300, an air pump 400, a pump 500, a radiator 510, and a power generation evaluation device 600.

  The fuel tank 300 is a tank for storing fuel gas and supplying it to the single cell 200, and is connected to the through hole 121 of the second end plate 120 by a fuel gas supply pipe 301. The air pump 400 is a device for taking in air, compressing and supplying the air, and is connected to the through hole 122 of the second end plate 120 by an oxidizing gas supply pipe 402. A fuel gas exhaust pipe 303 is connected to the through hole 123 of the second end plate 120. An oxidizing gas exhaust pipe 404 is connected to the through hole 124.

  The pump 500 is a pump for supplying cooling water to the cooling water flow path 105 of the intermediate plate 100. The pump 500 is connected to the cooling water flow path 105 of each intermediate plate 100 by a cooling water supply pipe 505 and a cooling water discharge pipe 506. On the cooling water supply pipe 505, a radiator 510 for cooling the cooling water is provided. The radiator 510 may be provided on the cooling water discharge pipe 506.

  The power generation evaluation device 600 is connected to each intermediate plate 100 by a cable 601. The power generation evaluation device 600 acquires the voltage value and current value of the single cell 200 via the intermediate plate 100 and the cable 601. The intermediate plate 100 may include a cell monitor for monitoring the voltage value and current value of the single cell 200, and the cell monitor and the power generation evaluation device 600 may be connected by the cable 601. The power generation evaluation apparatus 600 may acquire and evaluate not only the voltage and current generated by the single cell 200 but also the impedance of the single cell 200, the temperature of the single cell 200 during power generation, and the like.

  Compared to FIG. 1, in the state of FIG. 2 where the intermediate plate 100 and the single cell 200 are fastened by the fastening device 115, the first link plate 160 and the second link plate 165 rotate in opposite directions, respectively. Yes. The positions of the two adjacent first bolts 170 and second bolts 175 are such that the second bolt 175 has an apex angle of an isosceles triangle and the first bolt 170 has a base angle of an isosceles triangle. Comparing FIG. 1 and FIG. 2, the first link plate 160, the second link plate 165, the first bolt 170, and the second bolt 175 are expanded and contracted in the arrangement direction of the inspection apparatus 10. To work. The members for expansion and contraction are collectively called a link mechanism. By providing this link mechanism, the inspection apparatus 10 can make the interval between two adjacent intermediate plates 100 equal in the state where the fastening shown in FIG. 1 is released.

FIG. 3 is an enlarged view of the vicinity of the intermediate plate 100. The interval at the time of releasing the fastening between the first surface 100a and the second surface 100b of two adjacent intermediate plates 100 is Sp1, the thickness of the single cell 200 is T1, the thickness of the intermediate plate 100 is T2, and the second The distance between the first bolt 170 and the second bolt 175 is L1. The interval between the first bolt 170 and the second bolt 175 of the first link plate 160 and the interval between the first bolt 170 and the second bolt 175 of the second link plate 165 are the same. is there. The distance Sp1 between the two intermediate plates 100 when the fastening is released satisfies the following formula (1).
Sp1 = 2 × L1-T2 (1)
Since the interval Sp1 is set larger than the thickness T1 of the single cell 200, the single cell 200 can be inserted between the two intermediate plates 100.

  4A is a front view of the intermediate plate 100, and FIG. 4B is a cross-sectional view of the intermediate plate 100 taken along the line C-C. One intermediate plate 100 includes two connecting portions 70 and a central portion 80. Each of the two connecting portions 70 is fixed to the central portion 80 by five third bolts 90. If the 3rd volt | bolt 90 is removed, the connection part 70 and the center part 80 can be isolate | separated. The central portion 80 has through holes 101 to 104 at positions overlapping the single cell 200, and has two through holes 109 at positions contacting the lower surface of the single cell 200. When the central portion 80 and the single cell 200 are pressed, the through holes 101 to 104 form a fuel gas supply manifold, an oxidizing gas supply manifold, a fuel gas discharge manifold, and an oxidizing gas discharge manifold, respectively, as described above. The through hole 108 is a through hole that passes through the connecting portion 70 and allows the first shaft 130 (see FIGS. 1 and 2) to pass therethrough. The width W1 of the central portion 80 is preferably larger than the size W2 of the single cell 200 in the width direction. The width W <b> 1 is the length in the width direction of the central portion 80 in the front view of the intermediate plate 100. The two through holes 109 are through holes for allowing the second shaft 132 to pass therethrough. In order to support the single cell 200, the interval W3 between the two through holes 109 is preferably smaller than the width W2 of the single cell 200 in the width direction. The intermediate plate 100 includes the cooling water channel 105 as described above. The cooling water channel 105 is formed so as not to overlap with the through holes 101 to 104 and the through hole 109.

  Since the central portion 80 contacts the single cell 200, cooling water, fuel gas, etc., the central portion 80 is made of a material having excellent corrosion resistance and a surface treatment. On the other hand, since there is almost no need to consider the corrosion resistance of the connecting portion 70, an inexpensive and light material is adopted for the connecting portion 70.

  FIG. 5 shows a fastening release process. The top diagram in FIG. 5 shows a state at the time of fastening. In FIG. 5, since the drawing is fine and difficult to see, illustration of some of the members illustrated in FIG. 1 is omitted. FIG. 5 shows seven single cells 200 and eight intermediate plates 100. A position between two adjacent intermediate plates 100 is defined as positions P1 to P7. At the time of fastening, the size of the interval between the two intermediate plates 100 at the positions P1 to P7 is equal to the thickness T1 of the single cell 200.

  The second drawing from the top in FIG. 5 shows a state in which the fastening device 115 is moved slightly to the release side from the state at the time of fastening. In this state, the interval between the two intermediate plates 100 at the location P1 is widened. The interval between the two intermediate plates 100 at the place P1 is equal to the interval Sp1 in FIG. Note that the distance between the two intermediate plates 100 in the other locations P2 to P7 remains the same as the thickness T1 of the single cell 200.

  The third drawing from the top in FIG. 5 shows a state in which the fastening device 115 has been moved a little further to the release side from the second state from the top in FIG. In this state, the interval between the two intermediate plates 100 at the location P2 is widened. However, the interval between the two intermediate plates 100 at the location P1 does not extend from the interval Sp1 between the two intermediate plates 100 in the state of the second diagram from the top in FIG. This is because the first link plate 160 and the second link plate 165 are regulated so that the distance between the two intermediate plates 100 is not increased. Further, the interval between the two intermediate plates 100 in the other P3 to P7 remains the same as the thickness T1 of the single cell 200. in this way. When the pressing by the fastening device 115 is released, the interval between the two intermediate plates 100 at the place P1 close to the fastening device 115 increases from the thickness T1 of the single cell 200 to the interval Sp1. When the interval between the two intermediate plates 100 at the place P1 increases to the interval Sp1, the interval between the two intermediate plates 100 at the place P1 is increased by the first link plate 160 and the second link plate 15. Get regulated. Therefore, next, the interval between the two intermediate plates 100 at the location P2 increases from the thickness T1 of the single cell 200 to the interval Sp1.

  The lowermost figure of FIG. 5 shows a fastening release state. In this state, the interval between the two intermediate plates 100 is widened to the interval Sp1 at all the locations P1 to P7. As described above, when transitioning from the fastening state to the fastening release state, the interval between the two intermediate plates 100 increases from the thickness T1 of the single cell 200 to the interval Sp1 sequentially from the position (P1) close to the fastening device 115.

  FIG. 6 shows a fastening process. When transitioning from the fastening release state to the fastening state, the interval between the two intermediate plates 100 gradually decreases from the position (P1) close to the fastening device 115 to the thickness T1 of the single cell 200. The second drawing from the top in FIG. 6 shows a state where the fastening device 115 is slightly moved to the fastening side from the state at the time of fastening release. In this state, the interval between the two intermediate plates 100 at the place P1 is narrowed. The interval between the two intermediate plates 100 at the location P1 is equal to the interval T1 between the unit cells 200. Note that the interval between the two intermediate plates 100 in the other places P2 to P7 remains the same as the interval Sp1 in the released state.

  The third drawing from the top in FIG. 6 shows a state in which the fastening device 115 has been moved a little further to the fastening side from the second state from the top in FIG. In this state, the interval between the two intermediate plates 100 at the place P2 is narrowed. Further, the interval between the two intermediate plates 100 in the other P3 to P7 remains the same as the interval Sp1 in the released state. The bottom diagram in FIG. 6 shows a fastening state, which is the same state as the top diagram in FIG. That is, the size of the interval between the two intermediate plates 100 at the positions P1 to P7 is equal to the thickness T1 of the single cell 200.

  Before the inspection, the single cell 200 is carried in between the two intermediate plates 100 in the fastening release state, and is carried out after the inspection. When the link mechanism of this embodiment is not provided, it is necessary to position each intermediate plate 100 without using the link mechanism. Inside the intermediate plate 100, cooling water of about 80 ° C. flows, and the temperature of the intermediate plate 100 is relatively high. Therefore, when the inspector manually positions the intermediate plate 100 each time the inspector carries in or out the single cell, the work is troublesome. It is also conceivable that the cooling water is discharged from the intermediate plate 100 and the cooling water is supplied to the intermediate plate 100 each time the single cell 200 is carried in and out. In this case, although the temperature of the intermediate plate 100 can be lowered, it is necessary to discharge and supply cooling water to the intermediate plate 100, and the inspection efficiency is deteriorated. In this embodiment, since the link mechanism is provided, each intermediate plate 100 can be positioned only by moving the fastening device 115 in the direction of fastening release. As a result, the interval between the two intermediate plates 100 is the interval Sp1. Determined. In this way, it is easy to widen the interval between the two intermediate plates 100 to the interval Sp1. Moreover, since the discharge | emission operation | work of the cooling water with respect to the intermediate | middle board 100 and a supply operation become unnecessary, the fall of inspection efficiency can be suppressed.

  FIG. 7 shows the effect of this embodiment. In the case where there is no intermediate plate as in the prior art, detachment of the single cell, detachment of the cable 601 (FIG. 2) to the single cell 200, temperature adjustment of the cooling water, extraction of cooling water from the manifold, water adhering to the single cell 200 Time was taken to wipe off. Further, in the case where there is no intermediate plate as in the prior art, the single cells 200 are stacked on top, so that the single cells can only be stacked one by one. Therefore, it took time to stack the single cells 200. On the other hand, in this embodiment, since the single cell 200 is inserted between the two intermediate plates 100, all the single cells 200 can be loaded and unloaded at a time. Further, the interval between the two intermediate plates 100 can be made constant by using the first link plate 160 and the second link plate 165. Therefore, the time for carrying in and carrying out the single cell 200 can be greatly shortened.

  Further, when there is no intermediate plate as in the conventional case, the cable 601 is directly connected to the single cell 200. On the other hand, in this embodiment, the cable 601 is connected to the intermediate plate 100, and the single cell 200 is connected to the power generation evaluation apparatus 600 via the intermediate plate 100. It is easier to connect the cable 601 via the intermediate plate 100 than to connect the cable 601 directly to the single cell 200. In addition, when there is no intermediate plate as in the prior art, it is difficult to inspect each single cell 200 separately. On the other hand, in this embodiment, the two single cells 200 are separated by the intermediate plate 100. Therefore, each single cell 200 can be separated and inspected by taking the difference in voltage or current between the two cables 601 connected to the adjacent intermediate plate 100.

  In the case where there is no intermediate plate as in the prior art, after the inspection is completed, the inspector removes the cooling water from the manifold and then releases the fastening of the single cell 200. After the inspection is completed, some cooling water remains in the manifold. Therefore, since this some cooling water leaks and wets the single cell 200, it is necessary to wipe the wet single cell 200 after the inspection. On the other hand, in this embodiment, since the cooling water passes through the cooling water flow path 105 inside the intermediate plate 100, the cooling water does not leak even if the fastening of the single cell 200 and the intermediate plate 100 is released. The operation of wiping the unit cell 200 that has become wet later becomes unnecessary. Further, since it is not necessary to remove the cooling water from the intermediate plate 100, the temperature of the single cell 200 during the inspection can be adjusted in a short time, and the adjustment is easy.

  As described above, according to the present embodiment, the detachment of the single cell, the detachment of the cable 601 (FIG. 2) to the single cell 200, the temperature adjustment of the cooling water, the manifold, which are necessary when there is no intermediate plate as in the prior art. The time for removing the cooling water from the cell and wiping off the water adhering to the single cell 200 can be greatly shortened. In addition, using the first link plate 160 and the second link plate 165, the interval between the two intermediate plates 100 can be made constant. That is, according to the inspection apparatus of the present embodiment, the time for preparation for inspection or the time for post-processing after inspection can be reduced, and the inspection time as a whole can be shortened.

  Furthermore, according to the present embodiment, the time and cost required for maintenance of the intermediate plate 100 are significantly reduced. Most of the maintenance of the intermediate plate 100 is the maintenance of the central portion 80. This is because the maintenance target is concentrated in the central portion 80. The central portion 80 can be detached one by one by tightening the third bolt 90. That is, it is not necessary to remove the entire intermediate plate 100 from the first shaft 130 in order to remove the central portion 80. The operation of removing the entire intermediate plate 100 from the first shaft 130 includes not only the intermediate plate 100 to be removed but also the intermediate plate 100 and the first end plate 110 or the second end plate located outside the intermediate plate 100. It is also necessary to remove the end plate. Therefore, the ability to detach the intermediate plate 100 one by one greatly reduces the time and cost required for maintenance. Further, by using an inexpensive and light material for the connecting portion 70, the manufacturing cost of the intermediate plate 100 is reduced and the handling of the intermediate plate 100 is facilitated.

  The present invention is not limited to the above-described embodiments, examples, and modifications, and can be realized with various configurations without departing from the spirit of the present invention. For example, the technical features in the embodiments, examples, and modifications corresponding to the technical features in each embodiment described in the summary section of the invention are to solve some or all of the above-described problems, or In order to achieve part or all of the above-described effects, replacement or combination can be performed as appropriate. If the technical feature is not described as essential in the present specification, it can be deleted as appropriate.

DESCRIPTION OF SYMBOLS 10 ... Inspection apparatus 70 ... Connection part 80 ... Center part 90 ... 3rd volt | bolt 100 ... Intermediate | middle board 100a ... 1st surface 100b ... 2nd surface 101-104 ... Through-hole 105 ... Cooling water flow path 108 ... Through-hole 109 ... through hole 110 ... first end plate 115 ... fastening device 120 ... second end plate 121-124 ... through hole 130 ... first shaft 132 ... second shaft 160 ... first link plate 165 ... second Link plate 170 ... first bolt 175 ... second bolt 180 ... first insulating plate 190 ... second insulating plate 191-194 ... through hole 200 ... single cell 300 ... fuel tank 301 ... fuel gas supply pipe 303 ... Fuel gas exhaust pipe 400 ... Air pump 402 ... Oxidizing gas supply pipe 404 ... Oxidizing gas exhaust pipe 500 ... Pump 505 ... Cooling water supply pipe 506 ... Cooling water Extraction pipe 510 ... Radiator 600 ... power generation evaluation device 601 ... cable

Claims (1)

An inspection device that performs power generation inspection of a single cell of a fuel cell,
A plurality of intermediate plates holding a plurality of single cells by sandwiching one single cell at a time,
A shaft that passes through the plurality of intermediate plates and guides the movement of the intermediate plates;
A fastening device for holding and releasing the holding of the single cell by moving the plurality of intermediate plates along the shaft;
A power generation evaluation device connected to the single cell and evaluating the power generation characteristics of the single cell;
The intermediate plate is formed by fixing a part through which the shaft passes and a part sandwiching the single cell so that they can be separated.

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