阅读说明：本技术 一种燃料电池电堆一体化端板及其制作方法 (Integrated end plate of fuel cell stack and manufacturing method thereof ) 是由 孟维志 卢兵兵 石伟玉 侯中军 杨曦 于 2021-06-30 设计创作，主要内容包括：本发明公开了一种燃料电池电堆一体化端板,包括端板体,所述端板体的远离电池电芯的一端设置有集流板,所述集流板与所述端板体为一体结构,所述集流板的表面与所述端板体设置所述集流板的端面的表面平齐。本发明的燃料电池电堆一体化端板,集流板一体集成在端板体上,提高了结构强度,结构简单,减少了零件数量,使得整个电池堆的装配性能更好,有利于提高装配的效率。本发明还提供了上述燃料电池电堆一体化端板的制作方法。(The invention discloses a fuel cell stack integrated end plate which comprises an end plate body, wherein a current collecting plate is arranged at one end, far away from a cell core, of the end plate body, the current collecting plate and the end plate body are of an integrated structure, and the surface of the current collecting plate is flush with the surface of the end surface, provided with the current collecting plate, of the end plate body. According to the fuel cell stack integrated end plate, the collector plate is integrated on the end plate body, so that the structural strength is improved, the structure is simple, the number of parts is reduced, the assembly performance of the whole cell stack is better, and the assembly efficiency is improved. The invention also provides a manufacturing method of the fuel cell stack integrated end plate.)

1. The utility model provides a fuel cell pile integration end plate, its characterized in that, includes the end plate body, the one end of keeping away from battery electricity core of end plate body is provided with the current collector, the current collector with the end plate body structure as an organic whole, the surface of current collector with the end plate body sets up the surface parallel and level of the terminal surface of current collector.

2. The integrated end plate of fuel cell stack according to claim 1, wherein the edge of the current collector is provided with a bent edge, so that the current collector is a three-dimensional structural plate, the bent edge is bent toward the inside of the end plate, and the height of the bent edge is less than the thickness of the end plate.

3. The fuel cell stack-integrated end plate of claim 1, wherein the end plate body and the collector plate are injection molded as a unitary structure.

4. The fuel cell stack-integrated end plate of claim 1, wherein the end plate body and the current collecting plate are molded as an integral structure.

5. The fuel cell stack-integrated end plate according to claim 1, wherein the end plate body is provided with a first through hole for circulation of hydrogen gas, a second through hole for circulation of coolant, and a third through hole for circulation of air; and a fourth through hole is formed in the position, corresponding to the first through hole, of the collector plate, a fifth through hole is formed in the position, corresponding to the second through hole, of the collector plate, and a sixth through hole is formed in the position, corresponding to the third through hole, of the collector plate.

6. The fuel cell stack-integrated end plate according to claim 1, wherein the current collecting plate is a copper plate, and the end plate body is a resin plate.

7. The fuel cell stack-integrated end plate of claim 1, wherein the current collecting plate comprises a main plate body and a wiring plate body provided at an edge position of the main plate body.

8. The fuel cell stack-integrated end plate of claim 7, wherein the wiring plate body is parallel or perpendicular to the plane of the wiring plate body.

9. A method for manufacturing a fuel cell stack-integrated end plate according to any one of claims 1 to 8, comprising the steps of:

a) forming a current collecting plate;

b) and c, placing the formed current collecting plate in the step a into a mold, and injecting or molding resin on the surface of the current collecting plate to form the end plate body.

10. The method of claim 9, wherein the collector plate in step a is formed by stamping, hot stamping, or riveting with a reinforcement.

Technical Field

The invention relates to the technical field of fuel cells, in particular to an integrated end plate of a fuel cell stack and a manufacturing method thereof.

Background

The fuel cell includes two current collecting plates 01, two end plates 02, and a cell. The end plates 02 are located at both ends of the stack and have air, hydrogen and water passages provided therein, while also being required to withstand the assembly force of the stack. The cells are capable of generating an electric current. The current collecting plate 01 is connected to the battery core, the inside of the current collecting plate is called as a current collector, the current collecting plate extends out of the battery core and is the positive pole and the negative pole, and the current collecting plate is used for collecting current generated by the battery core and sending the current to the outside of the battery through a connected lead. The end plate 02 is an insulating plate and plays a role in isolating the current collecting plate 01 from the battery cell.

In the prior art, as shown in fig. 1, a current collecting plate 01 and an end plate 02 are two independent parts, and are assembled together by means of connecting members such as bolts after being stacked during installation. The end plate 02 having such a structure requires a support metal plate to be added to the inside thereof in order to improve the structural strength, and the structure is complicated. Meanwhile, the current collecting plate 01 still has a large exposed area, which causes certain difficulty in the insulation design of the cell stack. The collector plate 01 and the end plate 02 are two independent parts, and the number of the parts is large, so that the assembly efficiency is not improved.

Disclosure of Invention

In view of the above, the present invention provides an integrated end plate of a fuel cell stack, in which a collector plate is integrally integrated on an end plate body, so as to improve structural strength, simplify structure, reduce the number of parts, improve assembly performance of the whole cell stack, and facilitate improvement of assembly efficiency.

The invention also provides a manufacturing method of the fuel cell stack integrated end plate.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a fuel cell pile integration end plate, includes the end plate body, the one end of keeping away from battery electricity core of end plate body is provided with the current collector, the current collector with the end plate body structure as an organic whole, the surface of current collector with the end plate body sets up the surface parallel and level of the terminal surface of current collector.

Optionally, the edge of the current collector is provided with a bending edge, so that the current collector is a three-dimensional structure plate, the bending direction of the bending edge faces the inside of the end plate body, and the height of the bending edge is smaller than the thickness of the end plate body.

Optionally, the end plate body and the current collecting plate are formed into an integral structure through injection molding.

Optionally, the end plate body and the current collecting plate are molded into an integral structure.

Optionally, a first through hole for hydrogen circulation, a second through hole for coolant circulation, and a third through hole for air circulation are formed in the end plate body; and a fourth through hole is formed in the position, corresponding to the first through hole, of the collector plate, a fifth through hole is formed in the position, corresponding to the second through hole, of the collector plate, and a sixth through hole is formed in the position, corresponding to the third through hole, of the collector plate.

Optionally, the current collecting plate is a copper plate, and the end plate body is a resin plate.

Optionally, the current collecting plate comprises a main plate body and a wiring plate body, and the wiring plate body is arranged at the edge position of the main plate body.

Optionally, the connection plate body is parallel or perpendicular to the plane.

The invention also provides a manufacturing method of the fuel cell stack integrated end plate, wherein the end plate is the fuel cell stack integrated end plate and comprises the following steps:

a) forming a current collecting plate;

b) and c, placing the formed current collecting plate in the step a into a mold, and injecting or molding resin on the surface of the current collecting plate to form the end plate body.

Optionally, the collector plate in the step a is formed by stamping, or formed by hot forging, or formed by stamping and riveting a reinforcement.

According to the fuel cell stack integrated end plate, the current collecting plate and the end plate body are of an integrated structure, namely two parts in the prior art are combined into a whole, so that the number of the parts is reduced, the assembly performance of the whole cell stack is better, and the assembly efficiency is improved. The collector plate and the end plate body are of an integrated structure, so that the collector plate has the function of reinforcing the structure of the end plate body, the reinforcing plate does not need to be arranged in the end plate body, and the structure is simple. The current collecting plate and the end plate body are of an integrated structure, and the surface of the current collecting plate is flush with the surface of the end face of the end plate body, which is provided with the current collecting plate, so that the integrally formed end plate and the battery cell bipolar plate are in line contact with each other to form a plane, the encapsulated structure is more stable, and the sealing performance is better.

The invention also provides a manufacturing method of the fuel cell stack integrated end plate, which is used for manufacturing the fuel cell stack integrated end plate and has the advantages of simple method and convenient forming.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a prior art header and current collector;

fig. 2 is a schematic view of an angle structure of an integrated end plate of a fuel cell stack according to an embodiment of the present invention;

fig. 3 is a schematic structural view of another angle of an integrated end plate of a fuel cell stack according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic cross-sectional view taken at B-B in FIG. 3;

fig. 6 is a schematic structural view of a current collecting plate according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of an end plate body according to an embodiment of the present invention;

fig. 8 is a schematic view of an arrangement structure of a wiring board body according to an embodiment of the present invention;

fig. 9 is a schematic view of an arrangement structure of a wiring board body according to another embodiment of the present invention;

fig. 10 is a schematic view of an arrangement structure of a connection board body according to another embodiment of the present invention.

Wherein:

1. the terminal plate comprises a terminal plate body 101, a first through hole 102, a second through hole 103, a third through hole 2, a current collecting plate 201, a bent edge 202, a fourth through hole 203, a fifth through hole 204, a sixth through hole 205 and a wiring plate body.

Detailed Description

The invention discloses an integrated end plate of a fuel cell stack, wherein a collector plate is integrated on an end plate body, so that the structural strength is improved, the structure is simple, the number of parts is reduced, the assembly performance of the whole cell stack is better, and the assembly efficiency is improved.

The invention also provides a manufacturing method of the fuel cell stack integrated end plate.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.

Referring to fig. 2 to 10, the integrated end plate of the fuel cell stack of the present invention includes an end plate body 1, a current collecting plate 2 is disposed at one end of the end plate body 1 away from the cell core, the current collecting plate 2 and the end plate body 1 are integrated, and a surface of the current collecting plate 2 is flush with a surface of an end surface of the end plate body 1 where the current collecting plate 2 is disposed.

The collector plate 2 is made of a metal conductor material, and the end plate body 1 is made of an insulating material. The collector plate 2 is integrally formed on the end plate body 1, and the end plate in the name of the invention is not an end plate in the conventional sense in the prior art, but is an integrated body of the end plate and the collector plate in the prior art.

According to the integrated end plate of the fuel cell stack, the collector plate 2 and the end plate body 1 are of an integrated structure, namely two parts in the prior art are combined into a whole, so that the number of the parts is reduced, the assembly performance of the whole cell stack is better, and the assembly efficiency is improved. The collector plate 2 and the end plate body 1 are of an integral structure, so that the collector plate 2 has the function of reinforcing the structure of the end plate body 1, a reinforcing plate is not required to be arranged in the end plate body 1, and the structure is simple. The current collecting plate 2 and the end plate body 1 are of an integral structure, and the surface of the current collecting plate 2 is flush with the surface of the end face of the end plate body 1, which is provided with the current collecting plate 2, so that the integrally formed end plate and the battery cell bipolar plate are in line contact with each other to form a plane, the structure is more stable, and the sealing performance is better.

In order to improve the structural strength of the current collecting plate 2, the edge of the current collecting plate 2 is provided with a bending edge 201, so that the current collecting plate 2 becomes a three-dimensional structural plate, and the structural arrangement is not only beneficial to improving the structural strength of the plate body of the current collecting plate 2, but also improves the structural reliability of the integral structure formed by the current collecting plate 2 and the end plate body 1. It can be understood that the bending direction of the bending edge 201 is set toward the inside of the end plate body 1, and the height of the bending edge 201 is smaller than the thickness of the end plate body 1, so as to avoid the bending edge 201 from the other side of the end plate body 1.

Specifically, the end plate body 1 and the collector plate 2 are formed into an integral structure through injection molding or compression molding.

The end plate body 1 is provided with a first through hole 101 for hydrogen gas circulation, a second through hole 102 for cooling liquid circulation, and a third through hole 103 for air circulation. A fourth through hole 202 is provided at a position corresponding to the first through hole 101, a fifth through hole 203 is provided at a position corresponding to the second through hole 102, and a sixth through hole 204 is provided at a position corresponding to the third through hole 103 in the current collecting plate 2. The first through hole 101 and the fourth through hole 202 have the same shape and the corresponding size. The second through hole 102 and the fifth through hole 203 have the same shape and the corresponding size. The third through hole 103 and the sixth through hole 204 have the same shape and the corresponding size.

In order to enable the end plate body 1 and the current collecting plate 2 to be in an integral structure through injection molding or compression molding, the end plate body 1 can wrap surfaces around the fourth through hole 202, the fifth through hole 203 and the sixth through hole 204 on the current collecting plate 2, and surfaces around the fourth through hole 202, the fifth through hole 203 and the sixth through hole 204 are lower than surfaces of other positions of the current collecting plate 2, so that during injection molding, the thin-layer end plate body 1 structure wraps around hole openings of the fourth through hole 202, the fifth through hole 203 and the sixth through hole 204 and inner walls of the holes, and the insulation performance is improved.

In one embodiment, the current collecting plate 2 is a copper plate, and the end plate body 1 is a resin plate.

Specifically, the current collecting plate 2 includes a main plate body and a wiring plate body 205, the main plate body and the wiring plate body 205 are an integrated structure, and the wiring plate body 205 is disposed at an edge position of the main plate body. The wiring board body 205 is parallel or perpendicular to the plane in which it lies (the surface of the main board body). As shown in fig. 10, the connection plate body 205 is disposed perpendicular to the surface of the main plate body, and the connection plate body 205 of the current collecting plate 2 is disposed inside the stack package. As shown in fig. 8 and 9, the connection plate 205 is disposed parallel to the surface of the main plate, and the connection plate 205 of the current collecting plate 2 is disposed outside the stack package through the side surface of the end plate 1. The fuel cell stack integrated end plate of the present invention enables the wiring plate body 205 of the current collecting plate 2 to be disposed at a plurality of positions, and packaged inside the stack or disposed outside the stack as needed.

The invention also provides a manufacturing method of the fuel cell stack integrated end plate, wherein the end plate is the fuel cell stack integrated end plate and comprises the following steps:

a) forming the collector plate 2;

b) and d, placing the formed current collecting plate 2 in the step a into a mold, and injecting or molding resin on the surface of the current collecting plate 2 to form the end plate body 1.

The collector plate 2 is formed by stamping, hot forging, or riveting with a reinforcement, and the stamping, hot forging, stamping, and riveting with a reinforcement are common forming methods in the prior art, and are not described herein again.

The integrated end plate of the fuel cell stack is formed by integrating the current collecting plate 2 and the end plate body 1 made of resin materials, has simple structure, less parts and better assembly performance, the wiring plate body 205 is flexibly arranged and can be externally arranged or internally arranged as required, the current collecting plate 2 is not contacted with the internal environment of the stack package, and the insulation performance is better.

In the description of the present solution, it is to be understood that the terms "upper", "lower", "vertical", "inside", "outside", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present solution.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.