阅读说明：本技术 一种用于燃料电池堆的滑移式固定装置 (Sliding type fixing device for fuel cell stack ) 是由 马天才 于 2021-09-16 设计创作，主要内容包括：本发明涉及一种用于燃料电池堆的滑移式固定装置,包括底座和多个电堆支架,各个电堆支架分别固定连接在底座上,电堆支架与燃料电池堆的固定板固定连接,底座包括固定部和滑移部,固定部与燃料电池堆的PACK底板固定连接,滑移部与固定部滑动连接。与现有技术相比,本发明中,滑移部与固定部的滑移范围依据电堆热胀冷缩极限尺寸差确定,通过滑移部与固定部的相对滑动来抵消电堆双极板在高低温热胀冷缩带来的尺寸偏差,也有效的避免电堆模块整体结构受力不均匀等问题,结构简单、成本低。(The invention relates to a sliding type fixing device for a fuel cell stack, which comprises a base and a plurality of stack supports, wherein each stack support is respectively and fixedly connected to the base, the stack supports are fixedly connected with a fixing plate of the fuel cell stack, the base comprises a fixing part and a sliding part, the fixing part is fixedly connected with a PACK bottom plate of the fuel cell stack, and the sliding part is in sliding connection with the fixing part. Compared with the prior art, the sliding range of the sliding part and the fixing part is determined according to the extreme size difference of the stack caused by expansion with heat and contraction with cold, the size deviation of the bipolar plate of the stack caused by expansion with heat and contraction with cold at high and low temperatures is offset through the relative sliding of the sliding part and the fixing part, the problems of uneven stress of the overall structure of the stack module and the like are effectively avoided, the structure is simple, and the cost is low.)

1. The utility model provides a gliding fixing device for fuel cell stack, its characterized in that, includes base (1) and a plurality of galvanic pile support (2), each galvanic pile support (2) fixed connection respectively on base (1), the fixed plate fixed connection of galvanic pile support (2) and fuel cell stack (3), base (1) include fixed part (4) and the portion of sliding (5), fixed part (4) and the PACK bottom plate fixed connection of fuel cell stack (3), the portion of sliding (5) and fixed part (4) sliding connection.

2. Sliding fixation arrangement for a fuel cell stack according to claim 1, characterized in that the fixation part (4) consists of a plurality of rectangular tubes, including a first cross bar (41) and two first vertical bars (42), the fixed ends of the first vertical bars (42) being connected to the ends of the first cross bar (41);

the sliding part (5) is composed of a plurality of rectangular pipes and comprises a second cross rod (51) and two second vertical rods (52), and the fixed ends of the second vertical rods (52) are connected to the end part of the second cross rod (51);

the free end of second montant (52) inserts the free end of first montant (42), be equipped with on first montant (42) and slide bolt hole (61), be equipped with on second montant (52) and slide waist type hole (62), slide bolt (63) fixed mounting to sliding bolt hole (61) and run through the waist type hole (62) that slides, along with the slip of first montant (42) is followed in second montant (52), slide bolt (63) slide in the waist type hole (62) that slides.

3. Sliding fixation device for a fuel cell stack according to claim 2, characterized in that the free end of the second vertical rod (52) is provided with a chamfer (521).

4. The sliding type fixing device for the fuel cell stack is characterized in that the fixing portion (4) further comprises two fixing connecting rods (43), two ends of each fixing connecting rod (43) are respectively connected with two first vertical rods (42), each fixing connecting rod (43) and each first vertical rod (42) is provided with a mounting hole (7), and the fixing portion (4) is fixedly connected with a PACK bottom plate of the fuel cell stack (3) through the mounting holes (7).

5. Sliding fixing device for fuel cell stacks according to claim 4, characterized in that the mounting holes (7) comprise bolt holes (71) and waist-shaped holes (72), below the position of the PACK bottom plate of the fuel cell stack (3), the bolt holes (71) are provided on the upper side of the fixing link (43) and the first vertical rod (42), the waist-shaped holes (72) are provided on the lower side of the fixing link (43) and the first vertical rod (42), the bolt holes (71) and the waist-shaped holes (72) are in one-to-one correspondence and are aligned up and down.

6. Sliding type fixing device for fuel cell stack according to claim 2, characterized in that the first cross bar (41) and the second cross bar (51) are provided with support fixing holes (8), and the stack support (2) is fixedly connected with the base (1) through the support fixing holes (8).

7. Sliding fixation arrangement for a fuel cell stack according to claim 6, characterized in that the number of stack supports (2) is 4, and the first cross bar (41) is provided with one support fixation hole (8) at each end, and the second cross bar (51) is provided with one support fixation hole (8) at each end.

8. Sliding fixation arrangement for a fuel cell stack according to claim 1, characterized in that the stack holder (2) comprises an upper holder (21) and a lower holder (22), the bottom of the lower holder (22) being fixedly connected to the base (1), the bottom of the upper holder (21) being fixedly connected to the top of the lower holder (22), the side plates of the upper holder (21) and the lower holder (22) being fixedly connected to the fixation plates of the fuel cell stack (3).

9. Sliding fixing device for fuel cell stack according to claim 8, characterized in that, taking the sliding direction of the sliding part (5) along the fixing part (4) as y-axis and the direction perpendicular to the y-axis and parallel to the plane of the PACK bottom plate of the fuel cell stack (3) as x-axis, the bottom of the upper bracket (21) is provided with an upper connecting waist-shaped hole (211), the length direction of the upper connecting waist-shaped hole (211) is parallel to the y-axis, the bottom of the upper bracket (21) is fixedly connected with the top of the lower bracket (22) through the upper connecting waist-shaped hole (211); the bottom of the lower support (22) is provided with a lower connecting waist-shaped hole (221), the length direction of the lower connecting waist-shaped hole (221) is parallel to the x axis, and the bottom of the lower support (22) is fixedly connected with the base (1) through the lower connecting waist-shaped hole (221).

10. Slipping type fixing device for fuel cell stack according to claim 8, characterized in that the fixing plate of the fuel cell stack (3) is provided with a through hole, the side plate is fixedly connected with the fixing plate of the fuel cell stack (3) through a fixing plate (9), the length of the fixing plate (9) is larger than the length of the through hole, the side plate is fixedly connected with the fixing plate (9) through a fastening bolt, and the fixing plate of the fuel cell stack (3) is clamped between the side plate and the fixing plate (9).

Technical Field

The invention relates to the technical field of fuel cells, in particular to a sliding type fixing device for a fuel cell stack.

Background

A fuel cell is a chemical device that converts chemical energy into electrical energy by reacting fuel (hydrogen) with oxygen, and a hydrogen fuel cell is generally formed by combining one or more stack modules, which are tightly stacked by a plurality of bipolar plates and membrane electrodes. At present, a hydrogen fuel cell system is often applied to passenger trucks, light trucks and medium-heavy trucks, and as the required power of the hydrogen fuel cell system is increased, the fuel cell system formed by combining a plurality of electric pile modules can meet the power requirements of the vehicles. However, when a plurality of stack modules constitute a fuel cell, the following problems occur:

1. a plurality of pile module stromatolite, the hole site can have the error, and the reason that the error formed is pile module product reason on the one hand, and on the other hand is the machining error of the fixing device of cooperation pile module.

2. The bipolar plate in the galvanic pile module can appear expend with heat and contract with cold phenomenon when high low temperature changes, influences the whole size of galvanic pile module, can produce stress after galvanic pile module and fixing device are fixed for galvanic pile module overall structure atress is inhomogeneous, may lead to the galvanic pile leakproofness poor, shortens the galvanic pile life-span.

Chinese patent CN108365250A discloses a fixing device for fuel cell stack, which fixes a plurality of stack modules through a Z-shaped elastic structure design, thereby avoiding the damage of graphite electrode plate caused by too large stress in the vibration environment and prolonging the life of stack. However, the fixing device does not consider that the service life of the galvanic pile is influenced by the stress generated by self expansion and contraction under high and low temperature environments.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a sliding type fixing device for a fuel cell stack, wherein the relative sliding range of a sliding part and a fixing part is determined according to the extreme size difference of the stack caused by expansion with heat and contraction with cold, the size deviation of a bipolar plate of the stack caused by expansion with heat and contraction with cold at high and low temperatures is counteracted through the relative sliding of the sliding part and the fixing part, the problems of uneven stress of the overall structure of a stack module and the like are effectively avoided, and the sliding type fixing device is simple in structure and low in cost.

The purpose of the invention can be realized by the following technical scheme:

the utility model provides a gliding fixing device for fuel cell stack, includes base and a plurality of electric pile support, electric pile support difference fixed connection is on the base, the fixed plate fixed connection of electric pile support and fuel cell stack, base include fixed part and the portion of sliding, the PACK bottom plate fixed connection of fixed part and fuel cell stack, the portion of sliding and fixed part sliding connection.

Preferably, the fixing part is composed of a plurality of rectangular pipes and comprises a first cross rod and two first vertical rods, and the fixed ends of the first vertical rods are connected to the end parts of the first cross rod;

the sliding part consists of a plurality of rectangular pipes and comprises a second cross rod and two second vertical rods, and the fixed ends of the second vertical rods are connected to the end parts of the second cross rod;

the free end of second montant inserts the free end of first montant, be equipped with the bolt hole that slides on the first montant, be equipped with the waist type hole that slides on the second montant, the bolt fixed mounting that slides to the bolt hole that slides and run through the waist type hole that slides, along with the second montant along the slip of first montant, the bolt that slides in the waist type hole, and the length in waist type hole that slides is exactly the sliding range of the portion of sliding along the fixed part, and the sliding range can be confirmed according to the fuel cell stack bipolar plate expend with heat and contract with cold limit size difference.

Preferably, the pipe wall of the rectangular pipe of the first vertical rod is provided with two aligned sliding bolt holes, one of the sliding bolt holes is externally provided with a sliding nut, the pipe wall of the rectangular pipe of the second vertical rod is provided with two aligned sliding waist-shaped holes, during assembly, the second vertical rod is inserted into the first vertical rod, the sliding bolt holes fall in the range of the sliding waist-shaped holes, sliding bolts are inserted, and the sliding bolts sequentially penetrate through the sliding bolt holes, the sliding waist-shaped holes and the sliding bolt holes and are in threaded connection with the sliding nuts, so that the sliding bolts are fixed in the sliding bolt holes.

Preferably, the first cross rod is vertically connected with the first vertical rod, and the second cross rod is vertically connected with the second vertical rod.

Preferably, the pipe diameter of the second vertical rod is smaller than that of the first vertical rod, and the second vertical rod is just inserted into the first vertical rod.

Preferably, the free end of the second vertical rod is provided with a chamfer, so that the second vertical rod can easily enter the first vertical rod, and the inner wall of the rectangular pipe of the first vertical rod cannot be scratched.

Preferably, the fixed part still includes two fixed connecting rods, fixed connecting rod's both ends are connected with two first montants respectively, all be equipped with the mounting hole on fixed connecting rod and the first montant, the fixed part passes through the PACK bottom plate fixed connection of mounting hole and fuel cell heap.

Preferably, the fixing part is in threaded connection with a PACK bottom plate of the fuel cell stack through a mounting hole, the mounting hole comprises a bolt hole and a waist-shaped hole, the position of the PACK bottom plate of the fuel cell stack is below the mounting hole, the bolt hole is formed in the upper side of the fixing connecting rod and the first vertical rod, the waist-shaped hole is formed in the lower side of the fixing connecting rod and the first vertical rod, and the bolt hole and the waist-shaped hole are in one-to-one correspondence and are aligned up and down;

during assembly, the fixing part is fixed on a PACK bottom plate of the fuel cell stack by using a fixing bolt, the bolt hole is matched with the fixing bolt, the fixing bolt penetrates through the bolt hole and the waist-shaped hole, the waist-shaped hole is convenient to install, and assembly and machining errors can be eliminated.

Preferably, the first cross rod and the second cross rod are provided with support fixing holes, and the pile support is fixedly connected with the base through the support fixing holes.

Preferably, the number of the pile supports is 4, the two ends of the first cross rod are respectively provided with a support fixing hole, and the two ends of the second cross rod are respectively provided with a support fixing hole.

Preferably, the stack support comprises an upper support and a lower support, the bottom of the lower support is fixedly connected to the base, the bottom of the upper support is fixedly connected with the top of the lower support, and the side plates of the upper support and the lower support are fixedly connected with the fixing plate of the fuel cell stack.

Preferably, the sliding direction of the sliding part along the fixed part is taken as a y axis, the direction which is perpendicular to the y axis and parallel to the plane of the PACK bottom plate of the fuel cell stack is taken as an x axis, the bottom of the upper bracket is provided with an upper connecting waist-shaped hole, the length direction of the upper connecting waist-shaped hole is parallel to the y axis, and the bottom of the upper bracket is fixedly connected with the top of the lower bracket through the upper connecting waist-shaped hole; the bottom of the lower support is provided with a lower connecting waist-shaped hole, the length direction of the lower connecting waist-shaped hole is parallel to the x axis, and the bottom of the lower support is fixedly connected with the base through the lower connecting waist-shaped hole.

Preferably, the upper bracket and the lower bracket have different shapes, so that the two components can be well distinguished, and the mounting error in the assembling process is avoided; the upper connection waist type hole of upper bracket and the lower connection waist type hole of lower carriage can offset stack error, need not reprocess the pile support when the assembly or reaming etc. promote assembly speed.

Preferably, the front surface of the bracket fixing hole is in contact with the lower connecting waist-shaped hole of the lower bracket, the back surface of the bracket fixing hole is provided with a base connecting nut, and the base connecting bolt penetrates through the lower connecting waist-shaped hole and the bracket fixing hole and is in threaded connection with the base connecting nut, so that the lower bracket is fixed on the base.

Preferably, the top of the lower bracket is provided with a bracket connecting hole, the front surface of the bracket connecting hole is in contact with the upper connecting waist-shaped hole at the bottom of the upper bracket, the back surface of the bracket connecting hole is provided with a bracket connecting nut, and a bracket connecting bolt penetrates through the upper connecting waist-shaped hole and the bracket connecting hole and is in threaded connection with the bracket connecting nut, so that the upper bracket is fixedly connected with the lower bracket.

Preferably, a through hole is formed in a fixing plate of the fuel cell stack, the side plate is fixedly connected with the fixing plate of the fuel cell stack through a fixing plate, the length of the fixing plate is larger than that of the through hole, the side plate is fixedly connected with the fixing plate through a fastening bolt, and the fixing plate of the fuel cell stack is clamped between the side plate and the fixing plate.

Preferably, the fixing piece is a metal sheet, a fastening nut is arranged on the metal sheet, an upper support corresponds to the fixing piece, a lower support corresponds to the fixing piece, stack connecting holes are formed in the side plates of the upper support and the lower support, and a fastening bolt penetrates through the stack connecting holes in the side plates and through holes in the fixing plates of the fuel cell stacks and is connected with the fastening nut, so that the upper support and the lower support are fixedly connected with the fixing plates of the fuel cell stacks.

Compared with the prior art, the invention has the following beneficial effects:

(1) the sliding range of the sliding part and the fixing part is determined according to the size difference of the electric pile expansion with heat and contraction with cold, the size deviation of the electric pile bipolar plate caused by expansion with heat and contraction with cold at high and low temperatures is offset through the relative sliding of the sliding part and the fixing part, the problems that the whole structure of the electric pile module is uneven in stress and the like are effectively avoided, and the structure is simple and the cost is low.

(2) The sliding part and the fixing part are composed of rectangular pipes, the second vertical rod of the sliding part is inserted into the first vertical rod of the fixing part, the structure is simple, raw materials are easy to obtain, the manufacturing cost is reduced, chamfering treatment is carried out on the second vertical plate, the sliding part is easier to enter the fixing part, and the inner wall of the rectangular pipe of the fixing part can not be scratched, so that the relative sliding between the fixing part and the sliding part is prevented from being blocked by increased friction force.

(3) The pile support includes upper bracket and lower carriage, and two kinds of supports carry out waist type hole design to offset stack error, need not reprocess or reaming etc. the pile support when the assembly, promote the assembly speed, the assembly between spare parts such as base, pile support does not have the order restriction moreover, has improved assembly efficiency.

(4) The appearance of spare part is different, can avoid appearing the mistake when the assembly, and the monolithic phase is connected through welding, bolted connection, and is more reliable, does not have parts such as limited spring leaf of life, and life is longer, safe and reliable more.

Drawings

FIG. 1 is a schematic view of the assembly of a sliding fixture with a fuel cell stack;

FIG. 2 is a schematic view of a base structure of the sliding type fixing device;

FIG. 3 is a schematic view of a base structure of the sliding type fixing device;

FIG. 4 is a schematic view of the assembly of the fixing portion and the sliding portion of the sliding type fixing device;

FIG. 5 is a schematic view of a mounting hole;

FIG. 6 is a schematic structural view of a stack holder and a fuel cell stack;

FIG. 7 is a schematic view of the assembly of a stack support and a fuel cell stack;

reference numerals: 1. the base, 2, the pile support, 21, the upper bracket, 211, go up and connect waist type hole, 22, the lower carriage, 221, connect waist type hole down, 3, the fuel cell stack, 4, the fixed part, 41, first horizontal pole, 42, first montant, 43, fixed connecting rod, 5, the portion of sliding, 51, the second horizontal pole, 52, the second montant, 521, the chamfer, 61, the bolt hole that slides, 62, the waist type hole that slides, 63, the bolt that slides, 64, the nut that slides, 7, the mounting hole, 71, the bolt hole, 72, waist type hole, 8, support connecting hole, 9, the stationary blade.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. Parts are exaggerated in the drawing where appropriate for clarity of illustration.

In the description of the embodiments of the present application, it is to be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, refer to the orientation or positional relationship as shown in the drawings, or as conventionally placed in use of the product of the application, or as conventionally understood by those skilled in the art, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present application.

Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Example 1:

a sliding fixing device for fuel cell stack, as shown in fig. 1, includes base 1 and a plurality of electric pile support 2, and each electric pile support 2 is fixed connection respectively on base 1, and electric pile support 2 and the fixed plate fixed connection of fuel cell stack 3, as shown in fig. 2 to 4, base 1 includes fixed part 4 and glide part 5, fixed part 4 and the PACK bottom plate fixed connection of fuel cell stack 3, glide part 5 and fixed part 4 sliding connection.

As shown in fig. 2, the fixing portion 4 is composed of a plurality of rectangular tubes, and includes a first cross bar 41 and two first vertical bars 42, and fixed ends of the first vertical bars 42 are connected to ends of the first cross bar 41; the sliding part 5 is composed of a plurality of rectangular pipes and comprises a second cross rod 51 and two second vertical rods 52, and the fixed ends of the second vertical rods 52 are connected to the end parts of the second cross rod 51;

as shown in fig. 3, the free end of the second vertical rod 52 is inserted into the free end of the first vertical rod 42, the first vertical rod 42 is provided with a sliding bolt hole 61, the second vertical rod 52 is provided with a sliding waist-shaped hole 62, the sliding bolt 63 is fixedly mounted to the sliding bolt hole 61 and penetrates through the sliding waist-shaped hole 62, the sliding bolt 63 slides in the sliding waist-shaped hole 62 along with the sliding of the second vertical rod 52 along the first vertical rod 42, the length of the sliding waist-shaped hole 62 is the sliding range of the sliding part 5 along the fixing part 4, and the sliding range can be determined according to the extreme size difference of expansion caused by heat and contraction caused by cold of the bipolar plate of the fuel cell stack 3. Like this, when the pile takes place the size change because of the thermal barrier shrinkage, can make the portion of sliding 5 take place to slide for fixed part 4, offset the pile bipolar plate at the size deviation that high low temperature expend with heat and contract with cold brought, also the effectual pile module overall structure atress inhomogeneous scheduling problem of avoiding.

In this embodiment, the fixing portion 4 and the sliding portion 5 are formed by rectangular pipes, and the stack support 2 is a sheet metal part, so that the parts are connected in a bolt-nut mode, and in other embodiments, if the parts are not replaced, detached and the like in the later period, the parts can be directly welded, such as directly welding the sliding bolt 63 in the sliding bolt hole 61 and the like.

As shown in fig. 4, two aligned sliding bolt holes 61 are formed in the tube wall of the rectangular tube of the first vertical rod 42, a sliding nut 64 is arranged on one sliding bolt hole 61, the sliding nut 64 is welded outside the tube wall of the rectangular tube, two aligned sliding waist-shaped holes 62 are formed in the tube wall of the rectangular tube of the second vertical rod 52, when the sliding bolt is assembled, the second vertical rod 52 is inserted into the first vertical rod 42, the sliding bolt holes 61 fall within the range of the sliding waist-shaped holes 62, then the sliding bolt 63 is inserted, and the sliding bolt 63 sequentially penetrates through the sliding bolt holes 61, the sliding waist-shaped holes 62 and the sliding bolt holes 61 and is in threaded connection with the sliding nut 64, so that the sliding bolt 63 is fixed in the sliding bolt holes 61. In this embodiment, the slip nut 64 is welded directly to the outside of one slip bolt hole 61.

In this embodiment, the first cross bar 41 is vertically connected to the first vertical bar 42, and the second cross bar 51 is vertically connected to the second vertical bar 52. The diameter of the second vertical rod 52 is smaller than that of the first vertical rod 42, and the second vertical rod is just inserted into the first vertical rod 42. The free end of the second vertical rod 52 is provided with a chamfer 521, so that the second vertical rod 52 can easily enter the first vertical rod 42, and the inner wall of the rectangular pipe of the first vertical rod 42 can not be scratched.

In order to fix the base 1 on the PACK bottom plate of the fuel cell stack 3, as shown in fig. 2 and fig. 3, the fixing portion 4 further includes two fixing connecting rods 43, two ends of the fixing connecting rods 43 are respectively connected with the two first vertical rods 42, the fixing connecting rods 43 and the first vertical rods 42 are both provided with mounting holes 7, the mounting holes 7 on the first vertical rods 42 should not affect the sliding of the second vertical rods 52 in the first vertical rods 42, and the fixing portion 4 is fixedly connected with the PACK bottom plate of the fuel cell stack 3 through the mounting holes 7. In another embodiment, the mounting hole 7 may be provided only in the fixed link 43.

As shown in fig. 5, the fixing portion 4 is screwed with the PACK bottom plate of the fuel cell stack 3 through the mounting hole 7, the mounting hole 7 includes a bolt hole 71 and a waist-shaped hole 72, the bolt hole 71 is disposed on the upper side of the fixing link 43 and the first vertical rod 42, the waist-shaped hole 72 is disposed on the lower side of the fixing link 43 and the first vertical rod 42, and the bolt holes 71 and the waist-shaped holes 72 are aligned up and down in one-to-one correspondence; during assembly, the fixing part 4 is fixed on a PACK bottom plate of the fuel cell stack 3 by using a fixing bolt, the bolt hole 71 is matched with the fixing bolt, the fixing bolt penetrates through the bolt hole 71 and the waist-shaped hole 72, the waist-shaped hole 72 is convenient to mount, and assembly and machining errors can be eliminated.

The first cross rod 41 and the second cross rod 51 are provided with support fixing holes 8, and the pile support 2 is fixedly connected with the base 1 through the support fixing holes 8. In this embodiment, the number of the stack supports 2 is 4, the two ends of the first cross bar 41 are respectively provided with a support fixing hole 8, and the two ends of the second cross bar 51 are respectively provided with a support fixing hole 8. In other embodiments, the number of the stack supports 2 may be changed according to actual needs, and more support fixing holes 8 may be further provided on the first cross bar 41 and the second cross bar 51, so that the connection position of the stack supports 2 and the base 1 may be flexibly changed.

As shown in fig. 6 to 7, the stack frame 2 includes an upper frame 21 and a lower frame 22, the bottom of the lower frame 22 is fixedly connected to the base 1, the bottom of the upper frame 21 is fixedly connected to the top of the lower frame 22, and the side plates of the upper frame 21 and the lower frame 22 are fixedly connected to the fixing plate of the fuel cell stack 3.

As shown in fig. 6, the sliding direction of the sliding part 5 along the fixing part 4 is taken as the y-axis, the direction perpendicular to the y-axis and parallel to the plane of the PACK bottom plate of the fuel cell stack 3 is taken as the x-axis, the bottom of the upper support 21 is provided with an upper connecting waist-shaped hole 211, the length direction of the upper connecting waist-shaped hole 211 is parallel to the y-axis, and the bottom of the upper support 21 is fixedly connected with the top of the lower support 22 through the upper connecting waist-shaped hole 211; the bottom of the lower bracket 22 is provided with a lower connecting waist-shaped hole 221, the length direction of the lower connecting waist-shaped hole 221 is parallel to the x axis, and the bottom of the lower bracket 22 is fixedly connected with the base 1 through the lower connecting waist-shaped hole 221.

The front surface of the support fixing hole 8 is in contact with the lower connecting waist-shaped hole 221 of the lower support 22, the back surface of the support fixing hole 8 is provided with a base connecting nut, and the base connecting bolt penetrates through the lower connecting waist-shaped hole 221 and the support fixing hole 8 and is in threaded connection with the base connecting nut, so that the lower support 22 is fixed on the base 1. In this embodiment, the base connection nut is directly welded to the back of the bracket fixing hole 8.

The top of the lower support 22 is provided with a support connecting hole, the front surface of the support connecting hole is in contact with the upper connecting waist-shaped hole 211 at the bottom of the upper support 21, the back surface of the support connecting hole is provided with a support connecting nut, and a support connecting bolt penetrates through the upper connecting waist-shaped hole 211 and the support connecting hole and is in threaded connection with the support connecting nut, so that the upper support 21 is fixedly connected with the lower support 22. In this embodiment, the bracket coupling nut is directly welded to the back of the bracket coupling hole.

As shown in fig. 7, a through hole is provided in the fixing plate of the fuel cell stack 3, the side plate is fixedly connected to the fixing plate of the fuel cell stack 3 by a fixing piece 9, the length of the fixing piece 9 is longer than that of the through hole, the side plate is fixedly connected to the fixing piece 9 by a fastening bolt, and the fixing plate of the fuel cell stack 3 is sandwiched between the side plate and the fixing piece 9.

The fixing piece 9 is a metal piece, a fastening nut is arranged on the metal piece, an upper support 21 corresponds to the fixing piece 9, a lower support 22 corresponds to the fixing piece 9, pile connecting holes are formed in the side plates of the upper support 21 and the lower support 22, and a fastening bolt penetrates through the pile connecting holes in the side plates and through holes in the fixing plate of the fuel cell pile 3 and is connected with the fastening nut, so that the upper support 21 and the lower support 22 are fixedly connected with the fixing plate of the fuel cell pile 3. In this embodiment, with the stationary blade 9 by being the front to the direction of pile support 2, can directly weld two fastening nut on the front, fastening bolt passes the spiro union on stationary blade 9 behind pile connecting hole and the through-hole in proper order, fastening nut can not skid, and simple structure is convenient, because the length of stationary blade 9 is greater than the length of through-hole, thereby with the fixed plate centre gripping of fuel cell stack 3 between curb plate and stationary blade 9, realize the fixed connection between the fixed plate of pile support 2 and fuel cell stack 3.

Specifically, the structure of upper bracket 21 is different with lower carriage 22, upper connection waist type hole 211 (cooperate with the support connecting hole at lower carriage 22 top, link together upper bracket 21 and lower carriage 22 through leg joint bolt and leg joint nut) has been seted up to the bottom of upper bracket 21, the curb plate of upper bracket 21 has the pile connecting hole, the support connecting hole has been seted up at the top of lower carriage 22, lower connection waist type hole 221 (cooperate with the support fixed orifices 8 of base 1, link together lower carriage 22 and base 1 through base connecting bolt and base connecting nut), the curb plate of lower carriage 22 has the pile connecting hole.

In addition to the upper connecting waist-shaped hole 211 and the lower connecting waist-shaped hole 221, the shapes of the upper bracket 21 and the lower bracket 22 can be further changed, see fig. 6, so that the shapes of the upper bracket 21 and the lower bracket 22 are different, thereby well distinguishing the two components and avoiding installation errors in the assembling process as much as possible; the upper connection waist-shaped hole 211 of the upper support 21 and the lower connection waist-shaped hole 221 of the lower support 22 can offset the superposition error, the pile support 2 does not need to be repaired or reamed during assembly, and the assembly speed is improved.

The application has the advantages that:

the base 1 is formed by welding rectangular steel pipes, the pile support 2 is formed by welding sheet metal parts, raw materials are easy to obtain, the machining process is few, and the price is low.

Part kind is few, and base 1 includes fixed part 4 and the portion of sliding 5, and pile support 2 includes upper bracket 21 and lower carriage 22, and the part style is different moreover, easily processes and assembles, and the assembly process is difficult for makeing mistakes.

This application uses welding piece, sheet metal component etc. to fix through welding, bolted construction, and the assembly of being convenient for, dismantlement, later stage change and maintenance do not have the limited spare part of life (have the part in limit life like spring leaf etc.), need not regularly change spare part, long service life, and the device is safe and reliable more, and very big possible reduction leads to the device to become invalid because of the spare part damage, and then the possibility of damage pile.

Superposition errors can be offset by the kidney-shaped hole design of the upper support 21 and the lower support 22, the pile support 2 does not need to be repaired or reamed during assembly, the assembly speed is increased, the installation of parts such as the pile support 2 and the base 1 does not have a forced installation sequence, and the installation efficiency is higher.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.