Short pile tool for electric pile jig and electric pile jig

Abstract

The utility model provides a pile shortening tool for a pile jig and the pile jig, the pile shortening tool is used for being arranged between a bearing plate and a movable bottom plate of the pile jig, the pile shortening tool comprises a supporting part, a positioning part and a transmission part, the supporting part is supported between the bearing plate and the movable bottom plate, the positioning part and the transmission part are arranged on the supporting part, and the transmission part is arranged on the bearing plate. The positioning part is used for limiting the relative positions of the supporting part and the bearing plate as well as the supporting part and the movable bottom plate, and the transmission part is used for driving an upper ejector rod mechanism of the galvanic pile jig to ascend under the jacking action of a lower ejector rod mechanism arranged below the movable bottom plate. The short stack tool provided by the utility model has the advantages that the phenomenon that the pressing head of the pressing machine interferes with the short edge positioning rod when a short stack with a small number of single cells is pressed and stacked can be avoided, in addition, the number of the single cells of the short stack can be reduced, and the cost of the short stack or a rainbow stack is reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of fuel cell manufacturing, and particularly to a short stack tooling for a stack fixture and a stack fixture including the short stack tooling. Background Art

[0002] A stack is a core component of a hydrogen fuel cell engine system, where hydrogen and oxygen undergo a chemical reaction to generate electrical energy. The stack is composed of multiple cell units stacked in series, with bipolar plates and membrane electrodes alternately laminated, and seals are embedded between monomers, and finally tied and welded with a steel belt. A normal finished stack includes about 200 single cells and has a height of about 550 mm. During the production and R & D process, in order to test the performance, a short stack of 10 - 20 pieces needs to be manufactured.

[0003] As Figure 1 shown, the existing stack fixture includes a moving bottom plate 504 and a bearing plate 501. An upper ejector rod mechanism 502, a steel belt bending 503 connected to the upper end of the upper ejector rod mechanism, and a positioning pin 505 are arranged on the bearing plate. The bearing plate 501 is fixedly connected to the moving bottom plate 504 through the positioning pin 505. The moving bottom plate 504 carries the bearing plate 501 to move on the assembly line. When the moving bottom plate 504 enters a predetermined stacking position, the relative position between the bearing plate 501 and the short side positioning rod 6 can be defined. A lower ejector rod mechanism for jacking up the upper ejector rod mechanism 502 is arranged below the moving bottom plate 504. During the stacking process of the stack, the stack needs to be placed on the bearing plate 501 of the stack fixture. The lower ejector rod mechanism passes through the through groove on the moving bottom plate 504 to jack up the upper ejector rod mechanism, so that the steel belt bending 503 rises to a height in contact with the stack, realizing the positioning of the stack and the bearing plate 501.

[0004] However, when using the above stack fixture for stacking the short stack, due to the low height of the short stack, the limited height of the stack fixture, and the bearing plate 501 carrying the short stack being directly installed on the moving bottom plate 504, the press head will interfere with the short side positioning rod 6 first during the descending process, affecting the normal stacking.

[0005] Therefore, it is necessary to manufacture a tooling fixture suitable for stacking the short stack. Utility Model Content

[0006] The purpose of the present disclosure is to provide a short stack tooling for a stack fixture based on the above problems.

[0007] To achieve the above object, on the one hand, the present disclosure provides a short stack tooling for an electric stack fixture. The short stack tooling is used to be arranged between the bearing plate and the moving bottom plate of the electric stack fixture. The short stack tooling includes a support part, a positioning part, and a transmission part. The support part is supported between the bearing plate and the moving bottom plate. The positioning part and the transmission part are arranged on the support part. The positioning part is used to define the relative positions of the support part with the bearing plate and the moving bottom plate. The transmission part is used to drive the upper ejector rod mechanism of the electric stack fixture to rise under the jacking action of the lower ejector rod mechanism below the moving bottom plate.

[0008] In some embodiments, the support part includes an upper support plate and a lower support plate that are parallel and spaced apart up and down, and a plurality of support shafts connecting the upper support plate and the lower support plate.

[0009] In some embodiments, the positioning part includes a first positioning structure and a second positioning structure. The first positioning structure is used to define the relative position of the support part with the bearing plate, and the second positioning structure is used to define the relative position of the support part with the moving bottom plate.

[0010] In some embodiments, the first positioning structure includes a first positioning protrusion protruding upward from the top surface of the upper support plate and a first positioning groove provided on the bottom surface of the bearing plate and adapted to the first positioning protrusion. The second positioning structure includes a second positioning protrusion protruding upward from the top surface of the moving bottom plate and a second positioning groove provided on the bottom surface of the lower support plate and adapted to the second positioning protrusion.

[0011] In some embodiments, a connection hole is provided in the middle of the second positioning protrusion. The connection hole is used for a bolt to be inserted after the second positioning protrusion is inserted into the second positioning groove to fixedly connect the two together.

[0012] In some embodiments, a fixing groove is provided on the top surface of the upper support plate for cooperating with a positioning pin on the electric stack fixture to fixedly connect the bearing plate and the upper support plate.

[0013] In some embodiments, the transmission part includes a plurality of transmission shafts, and the plurality of transmission shafts are axially movably connected between the upper support plate and the lower support plate.

[0014] In some embodiments, the short stack tooling includes a guiding structure for guiding the transmission shaft to move axially along it.

[0015] In some embodiments, the guiding structure includes a bearing fixing seat and a linear bearing fixed on the bearing fixing seat. The bearing fixing seat is respectively fixed at the positions of the corresponding transmission shafts of the upper support plate and the lower support plate, and the transmission shaft is inserted into the corresponding linear bearing.

[0016] On the other hand, the present disclosure provides an electric stack fixture, which includes a carrier plate, a movable bottom plate, and a lower ejector rod mechanism. The electric stack fixture further includes the above-mentioned short stack tooling for the electric stack fixture, and the short stack tooling is detachably arranged between the carrier plate and the movable bottom plate.

[0017] Through the above technical solution, the support portion of the short stack tooling provided by the present disclosure is supported between the carrier plate and the movable bottom plate. Using its own height, the carrier plate carrying the short stack is lifted to the maximum height at which the super press head interferes with the short side positioning rod, and is less than the maximum height at which the electric stack can be pressed. The positioning portion provided on the support portion defines the relative positions of the support portion with the carrier plate and the movable bottom plate. Under the jacking action of the lower ejector rod mechanism, the transmission portion jacks up the steel belt bent at its upper end to the position in contact with the electric stack by jacking up the upper ejector rod mechanism, thereby defining the relative position of the short stack with the carrier plate. Therefore, when performing short stack pressing, with the above-mentioned electric stack fixture, the press head will not contact the short side positioning rod during the descending process, avoiding the phenomenon that the height is insufficient due to too few single battery cells in the short stack, causing interference between the press head and the short side positioning rod, and the number of single battery cells in the short stack can be reduced to the lowest, thereby reducing the cost of performing electric stack performance tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 is a schematic structural diagram of an existing electric stack fixture;

[0020] Figure 2 is a top perspective view of the short stack tooling for the electric stack fixture according to an embodiment of the present disclosure;

[0021] Figure 3 is a bottom perspective view of the short stack tooling for the electric stack fixture according to an embodiment of the present disclosure;

[0022] Figure 4 is a top perspective view of the electric stack fixture according to an embodiment of the present disclosure;

[0023] Figure 5 is a front view of the electric stack fixture according to an embodiment of the present disclosure;

[0024] Figure 6 is a bottom perspective view of the electric stack fixture according to an embodiment of the present disclosure.

[0025] Description of the reference numerals:

[0026] 101. Upper support plate; 102. Support shaft; 103. Lower support plate; 201. First positioning protrusion; 202. Positioning shaft; 203. Second positioning groove; 301. Transmission shaft; 401. Bearing fixing seat; 402. Linear bearing; 5. Stack fixture; 501. Load-bearing plate; 502. Upper push rod mechanism; 503. Steel belt bending; 504. Moving bottom plate; 505. Positioning pin; 6. Short side positioning rod. DETAILED DESCRIPTION

[0027] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0028] like Figure 1 As shown, during the stacking process, the bipolar plates and membrane electrodes of the battery stack need to be positioned by the short-side positioning rods 6. Therefore, the height of the battery stack in its natural state is required to be no greater than the maximum height of 640 mm that can be stacked, and no less than the maximum height of 380 mm at which the press head interferes with the short-side positioning rods 6. The height of the short stack in its natural state is much smaller than the interference height, and the supporting plate 501 carrying the short stack is installed on the movable bottom plate 504. Therefore, during the descent of the press head, it will preferentially interfere with the short-side positioning rods 6.

[0029] In order to solve the above problems, the present disclosure provides a short stack tooling for a stack fixture, such as Figure 4 As shown, the short stack fixture is used to be arranged between the supporting plate 501 and the movable bottom plate 504 of the stack fixture 5 .

[0030] like Figure 2 As shown, the short stack tooling includes a supporting part, a positioning part and a transmission part. The supporting part is supported between the supporting plate 501 and the movable bottom plate 504. The positioning part and the transmission part are arranged on the supporting part. The positioning part is used to limit the relative position of the supporting part, the supporting plate 501 and the movable bottom plate 504. The transmission part is used to drive the upper push rod mechanism 502 of the stack fixture 5 to rise under the lifting action of the lower push rod mechanism under the movable bottom plate 504.

[0031] When performing short stacking, the above-mentioned short stacking tooling is used, and the support part is supported between the carrier plate 501 and the movable bottom plate 504, and uses its own height to lift the carrier plate 501 carrying the short stack to the maximum height at which the super press head interferes with the short side positioning rod 6, and is less than the maximum height at which the stack can be stacked. The positioning part set on the support part defines the relative position of the support part, the carrier plate 501 and the movable bottom plate 504, and the transmission part, under the lifting action of the lower push rod mechanism, lifts the steel belt bend 503 connected to its upper end to the position in contact with the stack by lifting the upper push rod mechanism 502, thereby defining the relative position of the short stack and the carrier plate 501.

[0032] Therefore, when performing short stack pressing, the above-mentioned battery stack fixture 5 is used, and the press head will not contact the short side positioning rod 6 during the descending process, thereby avoiding the phenomenon that the press head and the short side positioning rod 6 interfere with each other due to insufficient height caused by too few single battery cells in the short stack, and the number of single battery cells in the short stack can be reduced to a minimum, thereby reducing the cost of performing battery stack performance testing.

[0033] The support portion of the present disclosure may have any suitable structure, for example Figure 2 In the illustrated embodiment, the support portion may include an upper support plate 101 and a lower support plate 103 that are parallel and spaced apart from each other. The upper support plate 101 and the lower support plate 103 that are parallel and spaced apart allow the short stack to be subjected to uniform force during the stacking process.

[0034] The support portion may also include five equally spaced support shafts 102, the two ends of the five support shafts 102 are fixedly connected to the upper support plate 101 and the lower support plate 103, two of which are arranged at diagonal positions of the upper support plate 101 and the lower support plate 103, and the other three are arranged at the center line position along the length direction, providing sufficient supporting force to the support portion, and the equally spaced arrangement makes each support shaft 102 evenly stressed. In some other embodiments, the support portion may include four or six support shafts 102 or other numbers, which will not be described in detail in this disclosure.

[0035] like Figure 2 As shown, two fixing grooves are provided on both sides of the upper support plate 101 along the length direction, and the shape of the fixing grooves should be adapted to the contour of the positioning pin 505. Figure 6 As shown, by inserting the positioning pin 505 on the carrier plate 501 into the fixing groove, the carrier plate 501 is fixedly connected to the upper support plate 101. Of course, in some other embodiments, other fixed connection methods can be selected, such as using a snap fit, setting a buckle in the fixing groove, and clamping the positioning pin 505 in the fixing groove. It should be noted that this connection method does not require that the shape of the fixing groove must be compatible with the contour shape of the positioning pin 505.

[0036] The positioning portion of the present disclosure may have any suitable structure.Figure 2 In the illustrated embodiment, two positioning shafts 202 are provided at the other diagonal positions of the upper support plate 101 and the lower support plate 103. Both ends of the positioning shafts 202 are fixedly connected to the upper support plate 101 and the lower support plate 103 respectively. The upper end surface of the positioning shaft 202 is flush with the top surface of the upper support plate 101, and the lower end surface is parallel to the bottom surface of the lower support plate 103.

[0037] On the upper end surface of the positioning shaft 202, a first positioning protrusion 201 protruding upward is provided. On the bottom surface of the carrier plate 501, a first positioning groove adapted to the first positioning protrusion 201 is provided. The first positioning protrusion 201 and the first positioning groove constitute the first positioning structure of the positioning portion. Insert the first positioning protrusion 201 into the first positioning groove to define the relative position between the support portion and the carrier plate 501.

[0038] On the moving bottom plate 504, a second positioning protrusion protruding upward from the top surface is provided. As Figure 3 shown, on the lower end surface of the positioning shaft 202, a second positioning groove 203 adapted to the second positioning protrusion is provided. The second positioning protrusion and the second positioning groove 203 constitute the second positioning structure of the positioning portion. Insert the second positioning protrusion into the second positioning groove 203 to define the relative position between the support portion and the moving bottom plate 504.

[0039] A connection hole is provided in the middle of the second positioning protrusion. After inserting it into the second positioning groove 203, pass a bolt through the connection hole from below the moving bottom plate 504 to fixedly connect the second positioning protrusion and the second positioning groove 203 together. In this way, the support portion is fixedly connected to the moving bottom plate 504.

[0040] Therefore, the positioning portion provided on the support portion can define the relative positions of the support portion with the carrier plate 501 and the moving bottom plate 504, so that when the moving bottom plate 504 carrying the short stack jig moves to the predetermined pressing stack position, the moving bottom plate 504 can define the relative position between the carrier plate 501 placed on the short stack tooling and the short side positioning rod 6.

[0041] In some other embodiments, the first positioning protrusion 201 and the second positioning groove 203 can be respectively provided on the top of the upper support plate 101 and the bottom of the lower support plate 103 of the support portion.

[0042] The transmission portion of the present disclosure can have any suitable structure. As Figure 2 shown in the illustrated embodiment, the transmission portion can include eight axially movable transmission shafts 301, which are arranged in two rows and four columns with the same interval for each column at the gap of the support shaft 102. As Figure 5 shown, the upper end of each transmission shaft 301 is in contact with the upper ejector rod mechanism 502. As Figure 6As shown, the lower push rod mechanism passes through the through slot in the middle of the movable bottom plate 504 to lift the upper push rod mechanism 502 up, thereby driving the steel strip bend 503 to contact the short pile, and limiting the relative position between the short pile and the bearing plate 501.

[0043] The guide structure provided on the short stack tooling, such as Figure 2 In the embodiment shown, a bearing fixing seat 401 and a linear bearing 402 fixed on the bearing fixing seat 401 are included. The bearing fixing seat 401 is fixed to the transmission shaft 301 positions corresponding to the upper support plate 101 and the lower support plate 103, respectively, and both ends of the transmission shaft 301 are inserted into the linear bearing 402, so that the transmission shaft 301 is controlled to move up and down only in the axial direction. The linear bearing 402 can be made of appropriate materials, such as graphite copper with good wear resistance.

[0044] In some other embodiments, the guide structure may eliminate the fixed bearing seat, and set a through hole at the position where the transmission shaft 301 is set on the lower support. A clamping piece is set in the through hole to clamp the linear bearing 402 on the lower support plate 103. In addition, the guide structure may also have any other appropriate mechanism.

[0045] The number of the transmission shafts 301 of the present disclosure needs to be the same as the number of the lower ejector rod mechanisms.

[0046] On the other hand, the present disclosure provides a battery stack fixture 5, which includes a carrier plate 501, a movable bottom plate 504 and the above-mentioned short stack tooling. The short stack tooling is detachably arranged between the carrier plate 501 and the movable bottom plate 504, thereby improving the practicability of the short stack tooling.

[0047] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0048] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A short stack tooling for a battery stack fixture, characterized in that: The short stack fixture is used to be arranged between the bearing plate (501) and the movable bottom plate (504) of the battery stack fixture (5), and the short stack fixture comprises a supporting part, a positioning part and a transmission part, wherein the supporting part is supported between the bearing plate (501) and the movable bottom plate (504), the positioning part and the transmission part are arranged on the supporting part, the positioning part is used to define the relative position of the supporting part, the bearing plate (501) and the movable bottom plate (504), and the transmission part is used to drive the upper push rod mechanism (502) of the battery stack fixture (5) to rise under the lifting action of the lower push rod mechanism below the movable bottom plate (504).

2. The short stack tooling for a stack fixture according to claim 1, characterized in that: The support portion comprises an upper support plate (101) and a lower support plate (103) which are arranged parallel to each other and spaced apart from each other, and a plurality of support shafts (102) connected between the upper support plate (101) and the lower support plate (103).

3. The short stack tooling for a battery stack fixture according to claim 2, characterized in that: The positioning portion comprises a first positioning structure and a second positioning structure, the first positioning structure being used to define the relative position of the support portion and the carrying plate (501), and the second positioning structure being used to define the relative position of the support portion and the movable bottom plate (504).

4. The short stack tooling for a battery stack fixture according to claim 3 is characterized in that: The first positioning structure includes a first positioning protrusion (201) protruding upward from the top surface of the upper support plate (101) and a first positioning groove arranged on the bottom surface of the carrying plate (501) and adapted to the first positioning protrusion (201); the second positioning structure includes a second positioning protrusion protruding upward from the top surface of the movable bottom plate (504) and a second positioning groove (203) arranged on the bottom surface of the lower support plate (103) and adapted to the second positioning protrusion.

5. The short stack tooling for a battery stack fixture according to claim 4, characterized in that: A connecting hole is provided in the middle of the second positioning protrusion, and the connecting hole is used for inserting a bolt after the second positioning protrusion is inserted into the second positioning groove (203) to fix the two together.

6. The short stack tooling for a battery stack fixture according to claim 2, characterized in that: A fixing groove is provided on the top surface of the upper support plate (101) for cooperating with the positioning pin (505) on the bearing plate (501) to fix the bearing plate (501) and the upper support plate (101) together.

7. The short stack tooling for a battery stack fixture according to claim 2, characterized in that: The transmission part comprises a plurality of transmission shafts (301), and the plurality of transmission shafts (301) are axially movably connected between the upper support plate (101) and the lower support plate (103).

8. The short stack tooling for a battery stack fixture according to claim 7, characterized in that: The short stack tooling comprises a guiding structure for guiding the transmission shaft (301) to move along its axial direction.

9. The short stack tooling for a battery stack fixture according to claim 8, characterized in that: The guiding structure comprises a bearing fixing seat (401) and a linear bearing (402) fixed on the bearing fixing seat (401); the bearing fixing seat (401) is respectively fixed to positions of the upper supporting plate (101) and the lower supporting plate (103) corresponding to the transmission shaft (301); and the transmission shaft (301) is inserted into the corresponding linear bearing (402).

10. A battery stack fixture, comprising a carrier plate (501) and a movable bottom plate (504), characterized in that: The battery stack jig further comprises a short stack tool for the battery stack jig as described in any one of claims 1 to 9, wherein the short stack tool is detachably arranged between the supporting plate (501) and the movable bottom plate (504).

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