Electric pile structure and fuel cell assembly with same

Abstract

The utility model relates to the field of fuel cells, in particular to a galvanic pile structure and a fuel cell assembly with the galvanic pile structure, which comprise a packaging body, a reactor core, a reactor core supporting mechanism and an end plate mechanism, the reactor core supporting mechanism comprises a fixed supporting mechanism and an adjustable supporting mechanism; the fixed supporting mechanism and the adjustable supporting mechanism are both distributed on the inner wall of the packaging body. The end plate mechanism comprises an air inlet end plate and a floating end plate mechanism; the fixed supporting mechanism, the adjustable supporting mechanism, the air inlet end plate and the floating end plate mechanism are propped against the reactor core; according to the utility model, the fixed supporting mechanism, the adjustable supporting mechanism, the air inlet end plate and the floating end plate mechanism are matched for use, so that a reactor core can be extruded and fixed in six directions, the reactor core is fixed while the overall strength of a packaging structure is ensured, and the overall vibration resistance and impact resistance of a galvanic pile are improved.

Description

Technical Field

[0001] The utility model relates to the field of fuel cells, and more specifically to a stack structure and a fuel cell assembly having the stack structure. Background Art

[0002] A hydrogen fuel cell converts hydrogen and oxygen into electric energy through an electrochemical reaction under the action of a catalyst, and the final product is water. It has the advantages of high conversion efficiency, low noise, and no pollution, and is considered to be one of the most important future power development directions, being widely favored in the fields of new energy vehicles, tramcars, portable power supplies, and distributed power generation.

[0003] At present, most of the domestic hydrogen fuel cell stack structures are in the form of the Toyota MIRAI stack structure, using tightening bolts for fixation. The tie rods play a role in preventing the stack core from collapsing and strengthening the structural strength of the overall encapsulation. However, there is a problem in the fixation of the stack core. Under the action of the assembly force, the tie rods themselves are not thick enough, and fixing the tie rods also requires threading holes in the encapsulation, which will affect the strength of the encapsulation itself. Under the action of the assembly force, there is still obvious deformation in the encapsulation; in addition, the contact area between the tie rods and the stack core support is limited, and it cannot provide good support for the stack core. Especially when the four sides of the stack core, namely the front, rear, left, and right, need to be fixed, a relatively large internal space of the encapsulation is required, resulting in a large waste of space in the encapsulation and an increase in the weight of the entire stack. When the stack core is subjected to vibration and impact, if there is a lack of sufficient support, there is a risk of hydrogen leakage.

[0004] In addition, a stack usually includes multiple series-connected single cells, and the multiple single cells need to be pressed by end plates at both ends. In addition, when the stack core is subjected to temperature shock, the stack core expands and contracts due to thermal expansion and contraction, and since there will be expansion and contraction inside the stack; and continuous expansion and contraction, if the stack core is in a fixed enclosed space, due to the external extrusion of the encapsulation body, it will seriously affect the normal use of the stack core in severe cases.

[0005] The existing patent 202321761976.1 - Stack Structure and Fuel Cell does not clearly disclose the technical content for solving the above technical problems.

[0006] Therefore, in order to improve or solve at least one of the above problems, it is necessary to optimize the design of the existing stack structure. Summary of the Utility Model

[0007] The purpose of the utility model is to provide a stack structure that can fix the stack core while ensuring the structural strength of the stack.

[0008] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0009] A stack structure includes a packaging body, a stack core, a stack core support mechanism, and an end plate mechanism;

[0010] The packaging body is a box structure with a hollow interior;

[0011] The stack core is placed inside the packaging body;

[0012] The stack core support mechanism includes a fixed support mechanism and an adjustable support mechanism;

[0013] Both the fixed support mechanism and the adjustable support mechanism are distributed on the inner wall of the packaging body;

[0014] The end plate mechanism includes an inlet end plate and a floating end plate mechanism;

[0015] The inlet end plate and the floating end plate mechanism are distributed at both ends of the packaging body;

[0016] The fixed support mechanism, the adjustable support mechanism, the inlet end plate, and the floating end plate mechanism press against the stack core.

[0017] The adjustable support mechanism includes an adjustable support member disposed close to the stack core, and the adjustable support member is connected to the packaging body by a short tightening bolt.

[0018] The fixed support mechanism is provided on two side surfaces of the inner wall of the packaging body, and the adjustable support mechanism is provided on the other two side surfaces.

[0019] The floating end plate mechanism includes a blind end plate and a floating end plate; the blind end plate is connected to the floating end plate by an elastic mechanism; the floating end plate is in contact with the end face of the stack core.

[0020] The elastic mechanism includes a plurality of elastic components; the elastic components include support springs.

[0021] The elastic component further includes a spring pad disposed at the end of the support spring.

[0022] The floating end plate is provided with fixing holes for placing the elastic components; the elastic component further includes a tightening bolt; the tightening bolt passes through the blind end plate and presses against the spring pad in the corresponding fixing hole.

[0023] A fuel cell assembly includes the stack structure.

[0024] The advantages of the present utility model are as follows:

[0025] The present utility model discloses a stack structure and a fuel cell assembly having the stack structure.

[0026] By using the fixed support mechanism, adjustable support mechanism, intake end plate and floating end plate mechanism in combination, the present utility model can achieve extrusion fixation in six directions of the core, while ensuring the overall strength of the encapsulation structure, and also realizing the fixation of the core, improving the overall anti-vibration and impact resistance of the stack.

[0027] Meanwhile, in the floating end plate mechanism disclosed by the present utility model, through the setting and use of the elastic mechanism, the core has a certain deformation space in the vertical direction within the encapsulation body, so that the compression deformation amount of the spring can be used to make up for the thermal expansion and contraction of the core, ensuring that the core still has good sealing performance under low-temperature working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The following briefly describes the content expressed in each drawing of the specification of the present utility model and the marks in the drawings:

[0029] Figure 1 is an exploded view of the present utility model.

[0030] Figure 2 is a schematic structural view when the core of the present utility model is connected to the end plate mechanism.

[0031] Figure 3 is a top view when the core of the present utility model is connected to the core support mechanism.

[0032] The marks in the above figures are all:

[0033] 1, tightening bolt; 2, blind end plate; 3, spring washer; 4, support spring; 5, floating end plate; 6, core; 7, fixed support; 8, encapsulation body; 9, adjustable support; 10, tightening bolt; 11, intake end plate. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0034] The following further describes in detail the specific embodiments of the present utility model by describing the optimal embodiments with reference to the drawings.

[0035] A stack structure includes a packaging body 8, a stack core 6, a stack core support mechanism, and an end plate mechanism; the packaging body 8 is a box structure with a hollow interior; the stack core 6 is placed inside the packaging body 8; the stack core support mechanism includes a fixed support mechanism and an adjustable support mechanism; both the fixed support mechanism and the adjustable support mechanism are distributed on the inner wall of the packaging body 8; the end plate mechanism includes an inlet end plate 11 and a floating end plate 5 mechanism; the inlet end plate 11 and the floating end plate 5 mechanism are distributed at both ends of the packaging body 8; the fixed support mechanism, the adjustable support mechanism, the inlet end plate 11, and the floating end plate 5 mechanism press against the stack core 6; by using the fixed support mechanism, the adjustable support mechanism, the inlet end plate 11, and the floating end plate 5 mechanism in cooperation, the present utility model can achieve the extrusion fixation of the stack core 6 in six directions, while ensuring the overall strength of the packaging structure, and also realizing the fixation of the stack core 6, improving the overall anti-vibration and impact resistance of the stack.

[0036] For the stack structure disclosed in the present utility model, the packaging body 8 mainly plays an external protection role, facilitating the arrangement and placement of the stack core 6. The stack core 6 is arranged inside the packaging body 8, and a stack core support mechanism and an end plate mechanism are provided on the packaging body 8; the stack core support mechanism mainly provides internal support for the stack core 6 placed in the packaging body 8, and the end plate mechanism mainly provides end support for the stack core 6, thereby realizing the extrusion fixation of the stack core 6 in six directions. While ensuring the overall strength of the packaging structure, it also realizes the fixation of the stack core 6, improving the overall anti-vibration and impact resistance of the stack.

[0037] As shown in the figure, the end plate mechanism of the present utility model includes an inlet end plate 11 and a floating end plate 5 mechanism; the inlet end plate 11 and the floating end plate 5 mechanism are distributed at both ends of the packaging body 8; the inlet end plate 11 is used for the lower support of the stack core 6, and the floating end plate 5 mechanism is used for the upper support of the stack core 6. In the present utility model, the fixed support mechanism and the adjustable support mechanism are arranged on the inner wall of the packaging body 8, and the extrusion fixation of the stack core 6 is achieved by pressing the stack core 6 with the fixed support mechanism, the adjustable support mechanism, the inlet end plate 11, and the floating end plate 5 mechanism.

[0038] In the present utility model, the adjustable support mechanism includes an adjustable support member 9 disposed close to the stack core 6, and the adjustable support member 9 is connected to the packaging body 8 through a short tightening bolt 10; a plurality of short tightening bolts 10 are connected to the adjustable support member 9, and the short tightening bolts 10 pass through the packaging body 8 and are connected to the adjustable support member 9. By controlling the screwing degree of the short tightening bolts 10 on the packaging body 8, the pushing of the adjustable support member 9 can be realized, and further the change of the extrusion force of the adjustable support mechanism on the stack core 6 can be achieved.

[0039] Similarly, in the present utility model, the fixed support mechanism includes a fixed support member 7 provided on the inner wall of the encapsulation body 8. The fixed support member 7 is fixedly connected to the encapsulation body 8, aiming to cooperate with the adjustable support mechanism to achieve side extrusion fixation of the reactor core 6.

[0040] In addition, in the present utility model, fixed support mechanisms are provided on two side surfaces of the inner wall of the encapsulation body 8, and adjustable support mechanisms are provided on the other two side surfaces; generally, one adjustable support mechanism corresponds to one fixed support mechanism; of course, one or more adjustable support mechanisms or fixed support mechanisms can be provided on one side surface of the inner wall of the encapsulation body 8; during specific design and installation, selection can be made according to the actual working conditions.

[0041] Furthermore, in the present utility model, the floating end plate 5 mechanism includes a blind end plate 2 and a floating end plate 5; the blind end plate 2 is connected to the floating end plate 5 through an elastic mechanism; the floating end plate 5 is in contact with the end face of the reactor core 6; in the present utility model, the blind end plate 2 is fixed at the end of the encapsulation body 8, and the floating end plate 5 is arranged inside the encapsulation body 8. The floating end plate 5 presses against the end of the reactor core 6, thereby realizing the blocking and extrusion of the reactor core 6; the setting of the elastic mechanism enables the floating end plate 5 to have a certain moving ability. Such a setting enables the floating end plate 5 to always be in contact with the reactor core 6 when the battery cell expands and contracts due to heat. Then, while realizing the position limitation of the reactor core 6, the compression deformation amount of the spring can be used to compensate for the expansion and contraction of the reactor core 6 due to heat, ensuring that the reactor core 6 still has good sealing performance under low-temperature working conditions.

[0042] Furthermore, in the present utility model, the elastic mechanism includes a plurality of elastic components; the plurality of elastic components are arranged at intervals between the blind end plate 2 and the floating end plate 5; in the present utility model, the elastic component includes a support spring 4; the support spring 4 provides an elastic force to ensure that the floating end plate 5 and the reactor core 6 are in a constant contact state.

[0043] Furthermore, in the present utility model, the elastic component further includes a spring pad 3 arranged at the end of the support spring 4; the spring pad 3 plays a good role in blocking and supporting, facilitating subsequent cooperation with the tightening bolt 1 to achieve extrusion fixation of the floating end plate 5; preventing the support spring 4 from detaching from the tightening bolt 1.

[0044] Furthermore, in the present utility model, the floating end plate 5 is provided with a fixing hole for placing the elastic component; the setting of the fixing hole in the present utility model facilitates the placement of the elastic component. At the same time, by subsequently inserting the tightening bolt 1 into the corresponding fixing hole, the position of the floating end plate 5 can also be limited; preventing the floating end plate 5 from having a lateral offset.

[0045] In addition, in the present utility model, the elastic component further includes a tightening bolt 1; the tightening bolt 1 passes through the blind end plate 2 and presses against the spring washer 3 in the corresponding fixing hole; the tightening bolt 1 is threadedly connected to the blind end plate 2, and the end is inserted into the fixing hole to extrude the elastic component in the fixing hole, so as to realize the extrusion of the floating end plate 5 on the end face of the reactor core 6.

[0046] A fuel cell assembly includes the above-mentioned stack structure.

[0047] Specifically:

[0048] For the stack structure disclosed in the present utility model, a strengthening structure is designed in the encapsulation to ensure the overall structural strength of the encapsulation and ensure that within the allowable range of deformation of the encapsulation under the action of the assembly force.

[0049] In addition, a fixed support 7 is designed on the encapsulation body 8, and a separate adjustable support 9 is designed. The short tightening bolt 10 abuts against the adjustable support 9, and then in cooperation with the fixed support 7, the reactor core 6 is fixed in the front, rear, left, and right 4 directions.

[0050] Axially, the inlet end plate 11 and the floating end plate 5 are used to fix the reactor core 6, so as to realize the fixation of the reactor core 6 in 6 directions. While ensuring the overall strength of the encapsulation structure, the fixation of the reactor core 6 is realized, and the anti-vibration and impact resistance of the whole stack are improved.

[0051] A support spring 4 is designed on the floating end plate 5. The assembly force acts on the support spring 4 through the spring washer 3, and the compression deformation amount of the spring is used to compensate for the thermal expansion and contraction of the reactor core 6, ensuring that the reactor core 6 still has good sealing performance under low-temperature working conditions. Specific embodiments:

[0053] Fix the inlet end plate 11 on the encapsulation body 8, place the reactor core 6 inside the encapsulation body 8, make the rear side and the left side of the reactor core 6 closely abut against the fixed support 7, place the floating end plate 5 on the reactor core 6, put the adjustable support 9 into the encapsulation body 8 along the guiding groove on the encapsulation body 8, and screw 9 short tightening bolts 10 into the threaded through holes of the encapsulation body 8 and gently act on the reactor core 6. 3 short tightening bolts 10 are distributed on each adjustable support 9.

[0054] Then, the support spring 4 and the spring pad 3 are successively placed into the fixing holes on the floating end plate 5, and the blind end plate 2 is fixed on the encapsulation body 8. After the pressure on the press acts on the floating end plate 5 to a certain assembly force, the long tightening bolt 1 is screwed into the threaded through hole of the blind end plate 2 and acts on the spring pad 3. Then, the short tightening bolt 10 is tightened with a certain torque so that the force acting on the core 6 reaches a certain level, and the core 6 is fixed in six directions of front, back, left, right, up, and down. Moreover, the support spring 4 enables the core 6 to maintain a certain deformation space in the vertical direction and can also compensate for the assembly force of the core 6 during contraction, thereby enabling the core 6 to play a sealing role.

[0055] Obviously, the specific implementation of the present invention is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. A stack structure, characterized in that, It includes a packaging body, a stack core, a stack core support mechanism, and an end plate mechanism; The packaging body is a box structure with a hollow interior; The stack core is placed inside the packaging body; The stack core support mechanism includes a fixed support mechanism and an adjustable support mechanism; Both the fixed support mechanism and the adjustable support mechanism are distributed on the inner wall of the packaging body; The end plate mechanism includes an air inlet end plate and a floating end plate mechanism; The air inlet end plate and the floating end plate mechanism are distributed at both ends of the packaging body; The fixed support mechanism, the adjustable support mechanism, the air inlet end plate, and the floating end plate mechanism press against the stack core.

2. The fuel cell stack structure according to claim 1, characterized in that, The adjustable support mechanism includes an adjustable support member disposed close to the stack core, and the adjustable support member is connected to the packaging body by a short tightening bolt.

3. The fuel cell stack structure according to claim 1, wherein The fixed support mechanism is provided on two side surfaces of the inner wall of the packaging body, and the adjustable support mechanism is provided on the other two side surfaces.

4. A stack structure according to claim 1, characterized in that, The floating end plate mechanism includes a blind end plate and a floating end plate; the blind end plate is connected to the floating end plate by an elastic mechanism; the floating end plate is in contact with the end face of the stack core.

5. A stack structure according to claim 4, characterized in that, The elastic mechanism includes a plurality of elastic components; the elastic components include support springs.

6. An electrostack structure according to claim 5, characterized in that, The elastic component further includes a spring pad disposed at the end of the support spring.

7. An electric stack structure according to claim 3, characterized in that, The floating end plate is provided with a fixing hole for placing the elastic component; the elastic component further includes a tightening bolt; the tightening bolt passes through the blind end plate and presses against the spring pad in the corresponding fixing hole.

8. A fuel cell assembly, characterized in that, It includes the stack structure according to any one of claims 1-7.

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