CN216389470U

CN216389470U - Electric pile positioning structure and electric pile assembly

Info

Publication number: CN216389470U
Application number: CN202122400257.4U
Authority: CN
Inventors: 二见谕; 王猛
Original assignee: Weishi Energy Technology Co Ltd
Current assignee: Weishi Energy Technology Co Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-04-26
Anticipated expiration: 2031-09-30

Abstract

The utility model provides a galvanic pile positioning structure and a galvanic pile assembly, comprising: the base is provided with a bearing surface used for bearing the monocells, the bearing surface is provided with a short edge and a long edge, and an included angle is formed between the short edge and the long edge; the first positioning piece is arranged on the bearing surface, is positioned on the short side edge of the bearing surface and is used for being in limit fit with the first groove on the short side wall of the single cell; the second positioning piece is arranged on the bearing surface and positioned on the long edge of the bearing surface, and the second positioning piece is used for being in limit fit with the second groove in the long side wall of the monocell. Through the technical scheme provided by the utility model, the problem of low single battery stacking precision in the prior art can be solved.

Description

Electric pile positioning structure and electric pile assembly

Technical Field

The utility model relates to the technical field of fuel cells, in particular to a galvanic pile positioning structure and a galvanic pile assembly.

Background

In recent years, new energy automobiles become a hot spot of research and attention of people, wherein fuel cell automobiles are rapidly developed in the new energy automobile industry due to the advantages of high starting speed, high energy conversion efficiency, environmental friendliness and the like. Among them, there is a very high requirement for positioning accuracy during stacking of single cells, and a fuel cell stack usually includes 300-600 single cells formed by welding or bonding, which results in the problems of gas leakage and low cell voltage of the stack due to dislocation of the single cells in the stack if the positioning structure is not reasonable or errors occur during stacking.

In the prior art, internal positioning, namely pin hole positioning, is adopted, so that for a full-power pile, the size of a pin hole for positioning is large, and the structural strength and the effective utilization rate of a bipolar plate are greatly influenced; meanwhile, after the assembly of the monocells is completed, the pins can not be taken out smoothly due to assembly errors of all the assembly devices, and certain limitation is brought to batch production. Meanwhile, the CVP (cell voltage collecting device) structure generally requires a separate protrusion structure on the unit cell, which increases the complexity of the fuel cell after assembly. If the traditional external positioning structure is adopted, dislocation of the monocells is easy to occur in the stacking process of the galvanic pile, so that the galvanic pile is repaired, and resources are greatly consumed.

SUMMERY OF THE UTILITY MODEL

The utility model provides a galvanic pile positioning structure and a galvanic pile assembly, which aim to solve the problem of low stacking accuracy of single batteries in the prior art.

In order to solve the above-mentioned problems, according to an aspect of the present invention, there is provided a stack positioning structure including: the base is provided with a bearing surface used for bearing the monocells, the bearing surface is provided with a short edge and a long edge, and an included angle is formed between the short edge and the long edge; the first positioning piece is arranged on the bearing surface, is positioned on the short side edge of the bearing surface and is used for being in limit fit with the first groove on the short side wall of the single cell; the second positioning piece is arranged on the bearing surface and positioned on the long edge of the bearing surface, and the second positioning piece is used for being in limit fit with the second groove in the long side wall of the monocell.

Furthermore, the number of the second positioning parts is at least two, and the at least two second positioning parts are arranged at intervals.

Furthermore, the first positioning piece and the second positioning piece are both of plate-shaped structures; and/or the first positioning part and the second positioning part are the same in shape and size.

Further, the length direction of the first positioning piece is inclined relative to the horizontal plane, and the length direction of the second positioning piece is inclined relative to the horizontal plane.

Further, the length direction of the first positioning piece is perpendicular to the bearing surface, and/or the length direction of the second positioning piece is perpendicular to the bearing surface.

Further, the bearing surface is obliquely arranged relative to the horizontal plane.

Further, the pile positioning structure is an integrated structure.

Further, the monocell has short lateral wall and long lateral wall, and short lateral wall has first recess, and long lateral wall has the second recess, and the first setting element of pile location structure is gone into to be gone into in the first recess, and the second setting element of pile location structure is gone into to be gone into in the second recess.

Further, the single cell comprises an anode plate assembly, a cathode plate assembly and a membrane electrode assembly, wherein the membrane electrode assembly is clamped between the anode plate assembly and the cathode plate assembly; the membrane electrode assembly comprises a membrane electrode frame and a membrane electrode arranged in the membrane electrode frame, the edge of the membrane electrode frame protrudes out of the edge of the anode plate assembly and/or the edge of the cathode plate assembly, the first groove is positioned on the short side of the membrane electrode frame, and the second groove is positioned on the long side of the membrane electrode frame.

According to another aspect of the utility model, a stack assembly is provided, the stack assembly comprising a stack and the stack locating structure, the stack comprising a plurality of single cells, the plurality of single cells being stacked on a carrying surface of the stack locating structure.

The technical scheme of the utility model provides a galvanic pile positioning structure, which comprises: the base is provided with a bearing surface used for bearing the monocells, the bearing surface is provided with a short edge and a long edge, and an included angle is formed between the short edge and the long edge; the first positioning piece is arranged on the bearing surface, is positioned on the short side edge of the bearing surface and is used for being in limit fit with the first groove on the short side wall of the single cell; the second positioning piece is arranged on the bearing surface and positioned on the long edge of the bearing surface, and the second positioning piece is used for being in limit fit with the second groove in the long side wall of the monocell. Adopt this scheme, when carrying out the monocell and piling up, spacing cooperation of second recess on the long lateral wall of first recess on the short lateral wall of first setting element and monocell, second setting element and monocell through spacing cooperation of second recess, short lateral wall and the long lateral wall of monocell have carried on spacingly simultaneously like this, make the monocell can accurately pile up on the loading face, have improved the precision of monocell when piling up. The first positioning piece and the second positioning piece are arranged on the bearing surface, so that the electric pile positioning structure is simplified, and the operation is simple and convenient. This scheme has abandoned the mode that adopts interior location (pinhole location) and outer location, and the cooperation through electric pile location structure and monocell alright carry out accurate quick location.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a block diagram illustrating a stack positioning structure provided by an embodiment of the present invention;

FIG. 2 is a block diagram illustrating a stack assembly according to another embodiment of the present invention;

FIG. 3 shows a block diagram of a single cell of FIG. 2;

fig. 4 shows an exploded view of a single cell of fig. 3.

Wherein the figures include the following reference numerals:

10. a base; 11. a bearing surface; 111. short edges; 112. a long edge;

20. a first positioning member;

30. a second positioning member;

40. a single cell; 41. short side walls; 411. a first groove; 42. a long side wall; 421. a second groove; 43. an anode plate assembly; 44. a cathode plate assembly; 45. a membrane electrode assembly.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 4, an embodiment of the present invention provides a stack positioning structure, including: the battery pack comprises a base 10, wherein the base 10 is provided with a bearing surface 11 for bearing a plurality of single batteries 40, the bearing surface 11 is provided with a short edge 111 and a long edge 112, and an included angle is formed between the short edge 111 and the long edge 112; the first positioning piece 20 is arranged on the bearing surface 11, the first positioning piece 20 is positioned on the short side edge 111 of the bearing surface 11, and the first positioning piece 20 is used for being in limit fit with the first groove 411 on the short side wall 41 of the single cell 40; and the second positioning member 30 is arranged on the bearing surface 11, the second positioning member 30 is positioned on the long edge 112 of the bearing surface 11, and the second positioning member 30 is used for being in limit fit with the second groove 421 on the long side wall 42 of the single cell 40.

By adopting the scheme, when the single cells 40 are stacked, the first positioning piece 20 is in limit fit with the first groove 411 on the short side wall of the single cell 40, and the second positioning piece 30 is in limit fit with the second groove 421 on the long side wall of the single cell 40, so that the short side wall and the long side wall of the single cell 40 are simultaneously limited, the single cells 40 can be accurately stacked on the bearing surface 11, and the accuracy of the single cells 40 in stacking is improved. The first positioning member 20 and the second positioning member 30 are both disposed on the carrying surface 11, so that the stack positioning structure is simplified, and the operation is simple. This scheme has abandoned the mode that adopts interior location (pinhole location) and outer location, and the cooperation through electric pile location structure and monocell 40 alright carry out accurate quick location.

Wherein the shapes of the bearing surface 11 and the single cells 40 are matched to better bear the single cells 40. Specifically, the length of the short side edges 111 of the mount surface 11 is not less than the length of the short side walls 41 of the unit cells 40, and the length of the long side edges 112 of the mount surface 11 is not less than the length of the long side walls 42 of the unit cells 40.

Preferably, the bearing surface 11 is a rectangular surface, and the included angle between the short edge 111 and the long edge 112 is 90 degrees. The base 10 is of a rectangular structure, so that the base can be matched with the rectangular single cells 40, and the material consumption and the cost can be reduced while the positioning and bearing effects are met. It should be noted that the rectangle in the present embodiment includes a case where a right-angle position has a chamfer or a fillet.

The number of the second positioning members 30 is at least two, and the at least two second positioning members 30 are arranged at intervals. The provision of the plurality of second positioning members 30 improves the positioning accuracy when stacking the single cells 40, and enhances the structural strength of the base 10.

Further, the first positioning member 20 and the second positioning member 30 are both plate-shaped structures. The first positioning member 20 and the second positioning member 30 are both configured to be plate-shaped, so as to be conveniently snapped into the first recess 411 and the second recess 421.

In the present embodiment, the first positioning member 20 and the second positioning member 30 are identical in shape and size. With the above arrangement, the first positioning member 20 and the second positioning member 30 are formed in the same shape and size, which facilitates the processing. Among them, the sizes of the first and

second positioning members

20 and 30 may be changed according to the total stacked number of the unit cells 40.

As shown in fig. 2, the first positioning member 20 is provided with its longitudinal direction inclined with respect to a horizontal plane, and the second positioning member 30 is provided with its longitudinal direction inclined with respect to a horizontal plane. Through the length direction of the first positioning part 20 and the second positioning part 30, the first positioning part 20 and the second positioning part 30 are obliquely arranged relative to the horizontal plane, so that when the single cells 40 are stacked, the single cells 40 are under the action of gravity in the vertical direction, and the gravity forces the first groove 411 and the second groove 421 on the single cells 40 to be smoothly clamped into the first positioning part 20 and the second positioning part 30, so that the stacking of the single cells 40 is realized, and the convenience of operation is improved.

In particular, the bearing surface 11 is arranged inclined with respect to the horizontal plane. With the above arrangement, when the single cells 40 are stacked, the single cells 40 placed on the bearing surface 11 are in an inclined state with respect to the horizontal plane, and the single cells 40 are subjected to the action of gravity, and the gravity forces the first grooves 411 and the second grooves 421 on the single cells 40 to smoothly snap into the first positioning members 20 and the second positioning members 30, so that the stacking of the single cells 40 is realized, and the stacking accuracy is ensured. The inclination angle of the carrying surface 11 with respect to the horizontal plane is 30-60 degrees, such as 40 degrees, 50 degrees, etc.

Further, the length direction of the first positioning member 20 is perpendicular to the bearing surface 11, and/or the length direction of the second positioning member 30 is perpendicular to the bearing surface 11.

As shown in fig. 1, the stack positioning structure is an integrated structure. The pile positioning structure is arranged into an integral structure, so that the pile positioning structure is convenient to process and high in structural strength.

The single cell 40 has a short sidewall 41 and a long sidewall 42, the short sidewall 41 has a first groove 411, the long sidewall 42 has a second groove 421, the first positioning member 20 of the stack positioning structure is snapped into the first groove 411, and the second positioning member 30 of the stack positioning structure is snapped into the second groove 421. Through setting up first recess 411 and second recess 421, be convenient for carry out spacing cooperation with first locator 20 and second locator 30, when piling up, play limiting displacement to monocell 40. Also, the plurality of unit cells 40 have the same structure, so that the adjacent unit cells 40 can be accurately aligned after the plurality of unit cells are stacked.

As shown in fig. 3 and 4, the single cell 40 includes an anode plate assembly 43, a cathode plate assembly 44, and a membrane electrode assembly 45(MEA), the membrane electrode assembly 45 is sandwiched between the anode plate assembly 43 and the cathode plate assembly 44, and the first groove 411 of the single cell 40 and the second groove 421 of the single cell 40 are both located on the side wall of the membrane electrode assembly 45. By providing the first groove 411 and the second groove 421 on the side walls of the membrane electrode assembly 45, the accuracy is higher and the operation is easier when stacking the single cells 40. Wherein the anode plate assembly 43 and the cathode plate assembly 44 have the same size, and the edge of the membrane electrode assembly 45 protrudes 1mm to 3mm, for example 2mm, from the edge of the anode plate assembly 43 or the cathode plate assembly 44, so that the first groove 411 and the second groove 421 are conveniently provided.

Further, the membrane electrode assembly 45 includes a membrane electrode frame and a membrane electrode disposed in the membrane electrode frame, an edge of the membrane electrode frame protrudes from an edge of the anode plate assembly 43 and/or the cathode plate assembly 44, the first groove 411 is located on a short side of the membrane electrode frame, and the second groove 421 is located on a long side of the membrane electrode frame. The membrane electrode frame, the anode plate assembly 43 and the cathode plate assembly 44 are all rectangular structures, and the outer edge size of the membrane electrode frame is larger than that of the anode plate assembly 43 and that of the cathode plate assembly 44. The frame of the membrane electrode is made of insulating materials such as plastics, so that the insulating effect cannot be influenced after the frame of the membrane electrode is contacted with the pile positioning structure.

Specifically, the anode plate assembly 43 includes an anode plate, the cathode plate assembly 44 includes a cathode plate, the cathode plate and the anode plate are prepared by processes such as cold stamping, hydroforming or etching, the cathode plate has a flow channel capable of uniformly distributing air and hydrogen, three-cavity common manifold ports of air and cooling liquid, an air distribution area, and the like, the front surface of the cathode plate is a contact surface with the MEA, the back surface is provided with a cooling liquid sealing glue line, the anode plate has a flow channel capable of uniformly distributing oxygen and hydrogen, three-cavity common manifold ports of air and cooling liquid, an air distribution area, and the like, the front surface of the anode plate is a contact surface with the MEA, the back surface and the back surface of the cathode plate of another adjacent single cell form a flow field of cooling liquid together, the cooling liquid is sealed by a glue line on the back surface of the cathode plate, and the reaction gas is bonded and sealed with the sealing glue on the sealing frame of the MEA by the cathode plate and the anode plate, thus, a single cathode plate, an anode plate and an MEA are formed to form a single cell structure.

According to another embodiment of the present invention, as shown in fig. 2, there is provided a stack assembly including a stack including a plurality of unit cells 40 and the above-described stack alignment structure, wherein the plurality of unit cells 40 are stacked on the carrying surface 11 of the stack alignment structure. By adopting the scheme, the mode of adopting inner positioning (pin hole positioning) and outer positioning is abandoned, no additional positioning structure is needed, positioning can be carried out through the structure of the monocells 40, the stacking accuracy is improved, and the stacking mode of the monocells 40 is simplified. When the single cells 40 are stacked, the short side walls 41 and the long side walls 42 of the single cells 40 are simultaneously limited by arranging the first positioning members 20 and the first grooves 411 and the second positioning members 30 and the second grooves 421 on the short side walls of the single cells 40 and limiting the matching, so that the single cells 40 can be accurately stacked on the bearing surface 11, and the accuracy of the single cells 40 in stacking is improved. Wherein, the first positioning member 20 and the second positioning member 30 are both disposed on the bearing surface 11, the stack positioning structure is simplified, and the single cells 40 are more convenient to stack.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A stack positioning structure, comprising:

the battery pack comprises a base (10), wherein the base (10) is provided with a bearing surface (11) used for bearing a plurality of single batteries (40), the bearing surface (11) is provided with a short edge (111) and a long edge (112), and an included angle is formed between the short edge (111) and the long edge (112);

the first positioning piece (20) is arranged on the bearing surface (11), the first positioning piece (20) is positioned on the short side edge (111) of the bearing surface (11), and the first positioning piece (20) is used for being in limit fit with a first groove (411) on the short side wall (41) of the single battery (40);

the second positioning piece (30) is arranged on the bearing surface (11), the second positioning piece (30) is located on the long edge (112) of the bearing surface (11), and the second positioning piece (30) is used for being in limit fit with a second groove (421) on the long side wall (42) of the single cell (40).

2. The stack positioning structure according to claim 1, wherein the number of the second positioning members (30) is at least two, and at least two of the second positioning members (30) are spaced apart from each other.

3. The stack positioning structure according to claim 1,

the first positioning piece (20) and the second positioning piece (30) are both plate-shaped structures; and/or the presence of a gas in the gas,

the first positioning element (20) and the second positioning element (30) are identical in shape and size.

4. The stack positioning structure according to claim 1, characterized in that the length direction of the first positioning member (20) is arranged obliquely with respect to a horizontal plane and/or the length direction of the second positioning member (30) is arranged obliquely with respect to a horizontal plane.

5. The stack positioning structure according to claim 1, characterized in that the length direction of the first positioning member (20) is arranged perpendicularly with respect to the bearing surface (11) and/or the length direction of the second positioning member (30) is arranged perpendicularly with respect to the bearing surface (11).

6. The galvanic pile positioning structure according to any one of claims 1 to 5, characterized in that the bearing surface (11) is disposed obliquely with respect to a horizontal plane.

7. The stack positioning structure according to claim 1, wherein the stack positioning structure is a unitary structure.

8. The stack positioning structure according to claim 1, characterized in that the battery cell (40) has a short sidewall (41) and a long sidewall (42), the short sidewall (41) has a first groove (411), the long sidewall (42) has a second groove (421), the first positioning member (20) of the stack positioning structure is snapped into the first groove (411), and the second positioning member (30) of the stack positioning structure is snapped into the second groove (421).

9. The stack positioning structure according to claim 8, wherein the single cell (40) includes an anode plate assembly (43), a cathode plate assembly (44), and a membrane electrode assembly (45), the membrane electrode assembly (45) being sandwiched between the anode plate assembly (43) and the cathode plate assembly (44); the membrane electrode assembly (45) comprises a membrane electrode frame and a membrane electrode arranged in the membrane electrode frame, the edge of the membrane electrode frame protrudes out of the edge of the anode plate assembly (43) and/or the edge of the cathode plate assembly (44), the first groove (411) is positioned on the short side of the membrane electrode frame, and the second groove (421) is positioned on the long side of the membrane electrode frame.

10. A stack assembly, characterized in that it comprises a stack comprising a plurality of electric cells (40) and a stack alignment structure according to any one of claims 1 to 9, said electric cells (40) being stacked on a carrying surface (11) of said stack alignment structure.