Impact-receiving structure for fuel cell stack and impact-receiving mounting method for fuel cell stack

Abstract

To install a buffer member in a stack case with high accuracy without damaging the buffer member due to contact between an impact member and the side surface of a stacked cell.SOLUTION: An impact-receiving structure of a fuel cell stack 100 includes a stacked cell 1 formed by stacking a plurality of power generation cells 10, a stack case 30 in which the stacked cell 1 is housed, and a cushioning member 120 arranged at an inner wall corner 37 of the stack case 30, and the cushioning member 120 includes a resin member 121 arranged opposite the inner wall corner 37, and an elastic member 122 arranged between the resin member 121 and an inner wall surface 38 of the stack case 30, and the elastic member 122 is fitted into and held in a groove 39 provided in the inner wall surface 38 of the stack case 30.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a shock-receiving structure for a fuel cell stack and a shock-receiving mounting method for a fuel cell stack. [Background technology]

[0002] In a conventional fuel cell assembly process, a stack case is provided with positioning guides, and positioning holes are formed in the flat plate-like components that make up the fuel cell, and the flat plate-like components are stacked in order to form cells. This stacking is then repeated a predetermined number of times to form a fuel cell.

[0003] For example, the abstract of Patent Document 1 discloses that "a fuel cell stack assembling method includes a knock pin placing step of placing knock pins that position unit cells, a stacking step of stacking the unit cells, and a compression step of compressing the unit cells, wherein the knock pin includes a knock pin main body portion that is placed in a positioning hole of the unit cell after the compression step, and a first extension portion and a second extension portion that are detachable and provided on both ends of the knock pin main body portion, and wherein after the compression step, a first extension portion removing step and a second extension portion removing step are provided for removing the first extension portion and the second extension portion while the unit cell is in a compressed state." [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2013-196849 A Summary of the Invention [Problem to be solved by the invention]

[0005] Here, a unit cell is composed of a membrane electrode assembly and separators that sandwich the membrane electrode assembly from both sides. The separators are made of metal such as steel plates, stainless steel plates, or aluminum plates.

[0006] When stacking the unit cells, it is desirable that the metal separators do not come into contact with the shock-receiving member (hereinafter referred to as the buffer member) located between the stack case and the unit cells. If the metal separators slide against the buffer member, they may scrape the resin material, causing resin powder to get into the stack case and affect power generation.

[0007] Furthermore, if the stacked cells (cells in which unit cells are stacked) and the buffer member become separated, there is a concern that the stacked cells may become misaligned if the stack case is subjected to a strong impact such as a collision.If the stacked cells of a fuel cell become misaligned, there is a risk that fuel gas may leak.

[0008] In this case, it is desirable that the distance between the stacked cells and the buffer member be, for example, several millimeters or less, preferably 1 mm or less. However, from the viewpoint of ensuring clearance, it is difficult to insert and arrange the buffer member between the stack case and the stacked cells after stacking the unit cells.

[0009] It is also possible to attach an elastic member between the stack case and the stacked cells, but this has the problem that the durability of the elastic member is not good and the accuracy of the attachment position is not good when considering the influence of the thickness of adhesives, etc.

[0010] The present invention has been made in consideration of the above circumstances, and its object is to provide an impact-receiving structure for a fuel cell stack that prevents the buffer member from being damaged by contact between the buffer member and the side of the stacked cells, and that enables the buffer member to be installed in the stack case with high precision, and an impact-receiving mounting method for a fuel cell stack. [Means for solving the problem]

[0011] That is, in order to solve the above-mentioned problems of the present invention, the impact-receiving structure for a fuel cell stack is an impact-receiving structure for a fuel cell stack comprising a stacked cell formed by stacking a plurality of power generation cells, a stack case in which the stacked cell is housed, and a cushioning member arranged at an inner wall corner of the stack case, wherein the cushioning member has a resin member arranged opposite the inner wall corner, and an elastic member arranged between the resin member and the inner wall surface of the stack case, and the elastic member is fitted into and held in a groove provided on the inner wall surface of the stack case. [Effects of the Invention]

[0012] According to the present invention, the buffer member can be installed in the stack case with high precision without being damaged by contact between the buffer member and the side surface of the stacked cells. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a top view of a fuel cell stack according to a first embodiment. [Figure 2] FIG. 2 is a partially enlarged view of the lower right end portion of FIG. [Figure 3] FIG. 10 is an explanatory diagram showing a configuration in which an adjustment mechanism is provided at a corner of the stack case. [Figure 4] 10 is an explanatory diagram showing a state in which an elastic member of a buffer member is fitted into a groove portion provided on an inner wall surface of a stack case. FIG. [Figure 5] 5 is a partially enlarged view showing a portion where an elastic member of the buffer member in FIG. 4 is attached to a groove in an inner wall surface. [Figure 6A] 10 is a flowchart showing a method for attaching a buffer member to an inner wall surface of a stack case of a fuel cell stack. [Figure 6B] 10 is a flowchart showing details of a stacked cell placement step (step S003). [Figure 7] FIG. 10 is an explanatory view showing an impact receiving structure of a fuel cell stack according to a second embodiment. [Figure 8]10 is an explanatory diagram showing a configuration in which the groove portion on the inner wall surface is tapered and the elastic member is also tapered; FIG. [Figure 9] 10 is an explanatory diagram showing a configuration in which a groove portion on an inner wall surface has a reverse tapered shape and an elastic member also has a reverse tapered shape. FIG. [Figure 10] FIG. 10 is an explanatory view showing an impact receiving structure of a fuel cell stack according to a third embodiment. [Figure 11] FIG. 10 is an explanatory view showing an impact receiving structure of a fuel cell stack according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0014] The following describes in detail embodiments of the present invention. Note that the embodiments described below are examples for realizing the present invention, and should be appropriately modified or changed depending on the configuration of the device to which the present invention is applied and various conditions. The present invention is not limited to the following embodiments. In addition, in each drawing, the same components are given the same reference numerals, and their description will be omitted as appropriate.

[0015] First Embodiment [Fuel cell stack configuration] Fig. 1 is a top view of a fuel cell stack according to a first embodiment, and Fig. 2 is a partially enlarged view of the lower right end portion of Fig. 1.

[0016] As shown in FIG. 1, the fuel cell stack 100 according to the first embodiment is configured to include a stack of cells 1, a stack case 30, and a buffer member 120.

[0017] The stacked cell 1 is configured by stacking a plurality of power generating cells 10 in the Z direction. The power generating cells 10 are, for example, solid polymer fuel cells having a rectangular shape that is horizontally (or vertically) elongated in the X direction. The power generating cells 10 are mainly configured with a membrane electrode assembly (not shown) and a pair of separators (not shown) arranged on both sides (both sides in the Z direction) of the membrane electrode assembly.

[0018] The pair of separators also have a rectangular shape that is horizontally (or vertically) long in the X direction. The separators are made of, for example, a steel plate, a stainless steel plate, an aluminum plate, a plated steel plate, a metal plate whose metal surface has been subjected to a corrosion-resistant surface treatment, or a carbon member.

[0019] The fuel cell stack 100 includes a stacked cell 1 in which a plurality of power generating cells 10 are stacked, and is provided in a stack case 30, and is mounted on, for example, a fuel cell vehicle.

[0020] An oxidant gas inlet manifold 111, a coolant inlet manifold 112, and a fuel gas outlet manifold 113 are provided along the Y direction at one edge in the -X direction of each power-generating cell 10 constituting the stacked cell 1. The oxidant gas inlet manifold 111 supplies an oxidant gas, such as an oxygen-containing gas. The coolant inlet manifold 112 supplies a coolant such as pure water, ethylene glycol, or oil. The fuel gas outlet manifold 113 discharges a fuel gas, such as a hydrogen-containing gas.

[0021] The oxidant gas inlet manifolds 111 provided in each power generating cell 10 are connected to one another in the stacking direction (Z direction). The coolant inlet manifolds 112 provided in each power generating cell 10 are connected to one another in the stacking direction. The fuel gas outlet manifolds 113 provided in each power generating cell 10 are connected to one another in the stacking direction.

[0022] A fuel gas inlet manifold 114, a coolant outlet manifold 115, and an oxidant gas outlet manifold 116 are provided along the Y direction at the other end edge of the power generating cell 10 in the X direction. The fuel gas inlet manifold 114 supplies oxidant gas. The coolant outlet manifold 115 discharges the coolant. The oxidant gas outlet manifold 116 discharges the oxidant gas.

[0023] The fuel gas inlet manifolds 114 provided in each of the power generating cells 10 are connected to one another in the stacking direction. The coolant outlet manifolds 115 provided in each of the power generating cells 10 are connected to one another in the stacking direction. The oxidant gas outlet manifolds 116 provided in each of the power generating cells 10 are connected to one another in the stacking direction.

[0024] An oxidant gas flow path (not shown) communicating with the oxidant gas inlet manifold 111 and the oxidant gas outlet manifold 116 is provided on the surface of one of the pair of separators facing the membrane electrode assembly. An oxidant gas flow path (not shown) communicating with the fuel gas inlet manifold 114 and the fuel gas outlet manifold 113 is provided on the surface of the other of the pair of separators facing the membrane electrode assembly. A coolant passage 117 communicating with the coolant inlet manifold 112 and the coolant outlet manifold 115 is provided between the opposing surfaces of adjacent separators.

[0025] As shown in Figure 1, the oxidant gas inlet communication hole 111 and the oxidant gas outlet communication hole 116, the fuel gas inlet communication hole 114 and the fuel gas outlet communication hole 113, and the coolant inlet communication hole 112 and the coolant outlet communication hole 115 are also formed in the first insulating member (insulator) and the end plate that constitute the end unit of the stacked cell 1.

[0026] Next, as shown in FIGS. 1 and 2, the buffer member 120 is arranged at the inner wall corner 37 of the stack case 30. The buffer member 120 has a resin member 121 and an elastic member 122. The resin member 121 is arranged to face the inner wall corner 37 of the stack case 30. The elastic member 122 is arranged between the resin member 121 and the inner wall surface 38 of the stack case 30.

[0027] Furthermore, in this embodiment, the fuel cell stack 100 is provided with an adjustment mechanism 130 at the corner 35 of the stack case 30.

[0028] 3 is an explanatory diagram showing a configuration in which an adjustment mechanism is provided at a corner of the stack case 30. As shown in Fig. 3, an adjustment mechanism 130 is provided at a corner 35 of the stack case 30, which can adjust the distance between the resin member 121 and an inner wall surface 38 of the stack case 30.

[0029] 3, the resin member 121 is bent along an inner wall corner 37 of the stack case 30 and extends in the stacking direction (Z direction) of the power generation cells 10. The adjustment mechanism 130 is configured to include a through hole 36 formed in the stack case 30, an internally threaded portion 131 formed in the resin member 121, and a bolt 132 that is inserted into the through hole 36 and threadedly engages with the internally threaded portion 131. The adjustment mechanism 130 moves the resin member 121 toward or away from the stack case 30 by rotating the bolt 132. At this time, the elastic member 122 expands and contracts.

[0030] In the first embodiment, the buffer member 120 is attached to the stack case 30. For example, as shown in Figures 2 and 3, the fuel cell stack 100 is held by fitting the elastic member 122 of the buffer member 120 into a groove 39 provided in the inner wall surface 38 of the stack case 30.

[0031] Fig. 4 is an explanatory diagram showing a state in which the elastic members of the buffer members are fitted into grooves provided on the inner wall surface of the stack case. Fig. 4 shows a cross section of the stack case 30 and the buffer members 120 in the stacking direction of the power generation cells 10.

[0032] As shown in Fig. 4, the stack case 30 is provided with a buffer member 120, and a resin member 121 is attached to a groove 39 in an inner wall surface 38. The resin member 121 does not need to be a single continuous part in the stacking direction. Therefore, in Fig. 4, for example, five grooves 39 are formed in the inner wall surface 38, and elastic members 122 are attached to the five grooves 39, respectively.

[0033] FIG. 4 is an example, and the number of grooves 39 and the number of elastic members 122 may be, for example, three, and are not limited to these numbers.

[0034] The pitch of adjacent elastic members 122 may be changed depending on, for example, the load capacity and rubber strength. The elastic members 122 may be fitted into grooves 39 in an uneven shape to fix the position in the loading direction.

[0035] Fig. 5 is a partially enlarged view of the portion where the elastic member of the buffer member shown in Fig. 4 is attached to the groove in the inner wall surface. As shown in Fig. 5, the elastic member 122 forms a convex portion relative to the groove 39 in the inner wall surface 38. In this case, by forming the groove 39 in the inner wall surface 38 as a concave portion, the position of the elastic member 122 in the stacking direction can be fixed.

[0036] [Method of installing buffer members for fuel cell stacks] FIG. 6A is a flowchart showing a method for attaching the buffer members 120 to the inner wall surface 38 of the stack case 30 of the fuel cell stack 100. In FIG.

[0037] The method of attaching the buffer members 120 to the fuel cell stack 100 shown in FIG. 6A includes a buffer member holding step (step S001) and a stacked cell arrangement step (step S003).

[0038] In the buffer member holding step (step S001), the fuel cell stack 100 performs a process of holding the buffer member 120 by fitting the elastic member 122 of the buffer member 120 into the groove portion 39 provided in the inner wall surface 38 of the stack case 30.

[0039] Next, in the stacked cell arrangement step (step S003), the fuel cell stack 100 performs a process of arranging the stacked cells 1 inside the stack case 30 that holds the buffer members 120. Specifically, in the stacked cell arrangement step (step S003), a compression direction drawing step (step S101), a stacked cell accommodating step (step S103), and a buffer member positioning step (step S105) shown in FIG.

[0040] 6B is a flowchart showing details of the stacked cell arrangement step (step S003). In the compression direction retraction step (step S101) of FIG. 6B, after the elastic members 122 are held in the grooves 39 of the inner wall surfaces 38 of the fuel cell stack 100, the adjustment mechanisms 130 retract the buffer members 120 arranged at the inner wall corners 37 in the compression direction (toward the corners 35).

[0041] Specifically, the bolt 132 constituting the adjustment mechanism 130 tightens the female thread portion 131, thereby drawing the resin member 121 into the inner wall corner portion 37 of the stack case 30. In this case, the resin member 121 facing the inner wall surface 38 is drawn into the inner wall surface 38 of the stack case 30.

[0042] As a result, in the fuel cell stack 100, a clearance is formed between the stacked cell 1 (or the power generating cell 10) and the resin member 121.

[0043] In the cell stack accommodating step (step S103) of FIG. 6B, the fuel cell stack 100 accommodates the cell stack 1 in the stack case 30 while the buffer members 120 are retracted.

[0044] In this case, the stacked cells 1 are housed in a predetermined position in the stack case 30 with a predetermined clearance secured between the stacked cells 1 and the resin member 121 by positioning guides (not shown) provided on the fuel cell stack 100.

[0045] In the buffer member positioning process (step S105) of Figure 6B, after the stacked cells 1 are accommodated in the stack case 30 of the fuel cell stack 100, the adjustment mechanism 130 releases the retraction and loosens the bolts 132 to adjust the distance between the resin member 121 and the stacked cells 1, thereby positioning the buffer member 120.

[0046] When the fuel cell stack 100 is positioned in the buffer member positioning step (step S105), the flow chart of FIG. 6B ends, and the stacked cell arrangement step (step S003) of the flow chart of FIG. 6A ends.

[0047] As described above, the impact receiving structure of the fuel cell stack 100 is configured to include a stacked cell 1 formed by stacking a plurality of power generating cells 10, a stack case 30 that houses the stacked cell 1, and a buffer member 120 that is arranged at an inner wall corner 37 of the stack case 30. The buffer member 120 has a resin member 121 that is arranged opposite the inner wall corner 37, and an elastic member 122 that is arranged between the resin member 121 and the inner wall surface 38 of the stack case 30. The elastic member 122 is fitted into and held in a groove 39 provided in the inner wall surface 38 of the stack case 30.

[0048] According to this configuration, the fuel cell stack 100 can attach the buffer member 120 to the stack case 30 by fitting the elastic member 122 of the buffer member 120 into the groove 39 on the inner wall surface 38 of the stack case 30. In this case, the fuel cell stack 100 fits the elastic member 122 of the buffer member 120 into the groove 39 on the inner wall surface 38 before accommodating the stacked cell 1 in which the power generation cells 10 are stacked.

[0049] As a result, the shock-receiving structure of the fuel cell stack 100 of the first embodiment can prevent contact between the buffer member 120 and the stacked cells 1. Therefore, the shock-receiving structure of the fuel cell stack 100 of the first embodiment prevents the buffer member 120 from being damaged by contact between the buffer member 120 and the side surface of the stacked cells 1, and can install the buffer member 120 in the stack case 30 with high precision.

[0050] In addition, the impact-receiving structure of the fuel cell stack 100 in the first embodiment may further include an adjustment mechanism 130 at the corner 35 of the stack case 30 that can adjust the distance between the resin member 121 and the inner wall surface 38 of the stack case 30.

[0051] According to this configuration, the fuel cell stack 100 can adjust the distance between the resin member 121 and the inner wall surface 38 of the stack case 30 by using the adjustment mechanism 130, so that a clearance can be set in the resin member 121.

[0052] Furthermore, in the impact receiving structure of the fuel cell stack 100 of the first embodiment, the resin member 121 may be bent along the inner wall corners 37 and extend in the stacking direction of the power generation cells 10. In this case, the adjustment mechanism 130 may be configured to include a through hole 36 formed in the stack case 30, a female thread portion 131 formed in the resin member 121, and a bolt 132 that is inserted into the through hole 36 and threaded into the female thread portion 131.

[0053] According to this configuration, the resin member 121 bends along the inner wall corner 37, and when the adjustment mechanism 130 is pulled into the corner 35 of the stack case 30, the resin member 121 can be pulled in both the pulling direction and the direction facing the inner wall surface 38. In this case, the fuel cell stack 100 can realize a configuration in which the adjustment mechanism 130 is pulled in by the female thread portion 131 and the bolt 132, so that the resin member 121 can be easily pulled in by simply tightening the bolt 132.

[0054] Furthermore, the resin member 121 can not only bend along the inner wall corners 37 but also extend in the stacking direction of the power generating cells 10, so that it can be drawn in evenly and dispersedly in the stacking direction.

[0055] <Second embodiment> Fig. 7 is an explanatory diagram showing the impact-receiving structure of a fuel cell stack according to Embodiment 2. As shown in Fig. 7, in the impact-receiving structure of a fuel cell stack 100 according to Embodiment 2, grooves 39 on the inner wall surface 38 of the stack case 30 are formed like rails in the direction in which the stacked cells 1 are loaded, and elastic members 122 are shaped to fit into the rails.

[0056] 7 is formed by extrusion molding and is fitted into grooves 39 on the inner wall surfaces 38 formed in the stacking direction of the stacked cells 1, thereby suppressing misalignment in the X and Y directions. Note that the shapes of the grooves 39 and the elastic member 122 are not limited to these.

[0057] Fig. 8 is an explanatory diagram showing a configuration in which the grooves on the inner wall surface are tapered and the elastic members are also tapered. As shown in Fig. 8, the grooves 39 on the inner wall surface 38 and the elastic members 122 are tapered, so that the grooves 39 on the inner wall surface 38 fix the elastic members 122 and enable the centers of the elastic members 122 to be aligned.

[0058] 9 is an explanatory diagram showing a configuration in which the grooves on the inner wall surface are reverse tapered and the elastic members are also reverse tapered. As shown in Fig. 9, the grooves 39 on the inner wall surface 38 and the elastic members 122 are reverse tapered, so that the grooves 39 on the inner wall surface 38 can fix the elastic members 122 and align the centers of the elastic members 122, as in Fig. 8.

[0059] 8 can be applied in any direction, either in the stacking direction or in the XY plane direction, in accordance with the grooves 39. On the other hand, the reverse tapered shape of FIG. 9 is preferably applied in the Z direction relative to the stacking direction of the stacked cells 1 for ease of installation.

[0060] <Third embodiment> 10 is an explanatory diagram showing the impact receiving structure of a fuel cell stack according to the third embodiment. As shown in FIG. 10, in the impact receiving structure of a fuel cell stack 100 according to the third embodiment, an adjustment mechanism 130 is configured by a wedge 133.

[0061] In the third embodiment, the adjustment mechanism 130 is configured as a wedge 133, and thus the buffer member holding step (step S001) and the cell stack arrangement step (step S003) shown in Fig. 6A are performed. That is, even if the adjustment mechanism 130 is configured as a wedge 133, the fuel cell stack 100 can perform the compression direction retraction step (step S101), the cell stack accommodating step (step S103), and the buffer member positioning step (step S105) shown in Fig. 6B.

[0062] The wedge 133 is formed to be smaller (shorter) than the resin member 121. For example, in the compression direction drawing step (step S101), the fuel cell stack 100 sets (inserts) the wedge 133 into the resin member 121, thereby drawing the resin member 121 into the inner wall corner portion 37 of the stack case 30. As a result, in the third embodiment as well, the resin member 121 facing the inner wall surface 38 is drawn into the inner wall surface 38 of the stack case 30, similar to the first embodiment.

[0063] Therefore, in the fuel cell stack 100, a clearance is formed between the stacked cell 1 (or the power generating cell 10) and the resin member 121.

[0064] In the cell stack accommodation step (step S103), the fuel cell stack 100 accommodates the cell stack 1 in the stack case 30 while the buffer members 120 are being retracted by the wedges 133.

[0065] In this case, the stacked cells 1 are housed in a predetermined position in the stack case 30 with a predetermined clearance secured between the stacked cells 1 and the resin member 121 by positioning guides provided in the fuel cell stack 100 .

[0066] In the buffer member positioning process (step S105), after the stacked cells 1 are housed in the stack case 30, the fuel cell stack 100 is released from the retraction by removing the wedge 133, and the elastic member 122 expands, causing the resin member 121 to abut against the stacked cells 1.

[0067] As a result, in the third embodiment, even if the adjustment mechanism 130 is configured by the wedge 133, the stacked cell arrangement step (step S003) can be performed.

[0068] <Fourth embodiment> Fig. 11 is an explanatory diagram showing the impact bearing structure of a fuel cell stack according to Embodiment 4. As shown in Fig. 11, the impact bearing structure of a fuel cell stack 100 according to Embodiment 4 has an adjustment mechanism 130 that is made up of a clamp jig 134, a recess 135 provided in a resin member 121, and a through-hole 36 provided in the case.

[0069] The clamp jig 134 includes, for example, an engaging portion 136 that is inserted into the through-hole 36 and engages with the recessed portion 135, and a rotating cam mechanism 137 that pulls the engaging portion toward the clamp jig 134.

[0070] In the fourth embodiment, the adjustment mechanism 130 is configured by the through-hole 36, the rotating cam mechanism 137 and the engaging portion 136 of the clamping jig 134, and the recessed portion 135, and thereby performs the buffer member holding step (step S001) and the stacked cell arrangement step (step S003) shown in Fig. 6A. That is, even though the fuel cell stack 100 is configured so that the distance between the resin member 121 and the inner wall surface 38 of the stack case 30 can be adjusted by the rotating cam mechanism 137 of the clamping jig 134, the recessed portion 135, and the engaging portion 136, it can still perform the compression direction retraction step (step S101), the stacked cell accommodating step (step S103), and the buffer member positioning step (step S105) shown in Fig. 6B.

[0071] In the first to fourth embodiments, in the stacked cell accommodation process (step S103) of Figure 6B, the stacked cell 1 is accommodated directly in the stack case 30, but this embodiment is not limited to this.

[0072] For example, in the stacked cell accommodation step (step S103), the fuel cell stack 100 may accommodate the stacked cells 1 by stacking the power generating cells 10 in the stack case 30 while the buffer member 120 is retracted, and stacking a predetermined number of power generating cells 10 to form the stacked cells 1.

[0073] The shock-receiving mounting method for the fuel cell stack 100 is a shock-receiving mounting method for the fuel cell stack 100 including the stacked cells 1 and the stack case 30, and the fuel cell stack 100 has a buffer member 120 arranged at an inner wall corner 37 of the stack case 30, and the buffer member 120 may have a resin member 121 and an elastic member 122. In this case, the shock-receiving mounting method for the fuel cell stack 100 can execute a buffer member holding step (step S001) for holding the buffer member 120 and a stacked cell arrangement step (step S003).

[0074] Furthermore, the impact-receiving mounting method for the fuel cell stack 100 may include a compression direction drawing step (step S101), a stacked cell accommodating step (step S103), and a buffer member positioning step (step S105) in the stacked cell arranging step (step S003). [Explanation of symbols]

[0075] 1. Stacked cell 10 Power generation cells 30 Stack Case 37 Inner wall corner 38 Inner wall surface 39 Groove 120 Cushioning material 121 Resin parts 122 Elastic member 130 Adjustment mechanism 131 Female thread 132 volts 133 Wedge 134 Clamping jig 135 recess 136 Engagement part 137 Rotating Cam Mechanism

Claims

1. 1. A shock-receiving structure for a fuel cell stack, comprising: a stack cell formed by stacking a plurality of power-generating cells; a stack case that houses the stack cell; and buffer members that are disposed at corners of an inner wall of the stack case, The buffer member is a resin member disposed opposite the inner wall corner portion; and an elastic member disposed between the resin member and the inner wall surface of the stack case, The elastic member is The stack case is fitted and held in a groove formed on an inner wall surface of the stack case.

1. A shock-receiving structure for a fuel cell stack.

2. The corners of the stack case are provided with: The stack case further includes an adjustment mechanism that can adjust the distance between the resin member and an inner wall surface of the stack case.

2. The impact receiving structure for a fuel cell stack according to claim 1.

3. The resin member is the inner wall corners are bent along the inner wall corners and extend in the stacking direction of the cells; The adjustment mechanism includes: a through hole formed in the stack case; a female thread portion formed in the resin member; and a bolt inserted into the through hole and screwed into the female thread portion. The impact-receiving structure for a fuel cell stack according to claim 2.

4. 1. A method for mounting a fuel cell stack with impact resistance, the method comprising: a stack cell formed by stacking a plurality of power generation cells; and a stack case that houses the stack cell, the method comprising: a buffer member disposed at an inner wall corner of the stack case; The buffer member is a resin member disposed opposite the inner wall corner portion; and an elastic member disposed between the resin member and the inner wall surface of the stack case, a buffer member holding step of fitting the elastic member into a groove formed on an inner wall surface of the stack case to hold the buffer member; a stacked cell arrangement step of arranging the stacked cells inside the stack case in which the buffer member is held; A method for mounting a fuel cell stack with impact resistance.

5. The corners of the stack case are provided with: an adjustment mechanism capable of adjusting the distance between the resin member and an inner wall surface of the stack case; a step of, after the elastic member is held, the adjustment mechanism pulling in the buffer member arranged at the inner wall corner portion in a compression direction; a step of accommodating the stacked cells in the stack case while the buffer member is being retracted; a step of positioning the buffer member by releasing the adjustment mechanism after the stacked cells are housed in the stack case and adjusting a predetermined distance between the resin member and the stacked cells; 5. The method for mounting a fuel cell stack with impact resistance according to claim 4, further comprising:

Images