Fuel cell stack

Abstract

The utility model relates to an electric pile, in particular to a fuel cell electric pile which comprises an insulating upper plate and an insulating bottom plate, and an accommodating space is formed between the insulating upper plate and the insulating bottom plate; the electric pile is arranged in the accommodating space; the elastic piece is arranged in the accommodating space and is propped against a bearing plate at the bottom of the electric pile and the insulating bottom plate; one end of each locking rod is connected with the insulating upper plate, and the other end of each locking rod penetrates through the insulating bottom plate; and the adjusting part is arranged in a built-in cavity formed in the insulating bottom plate, is connected with the plurality of locking rods, and is used for changing the distance between the insulating upper plate and the insulating bottom plate in cooperation with the locking rods so as to change the elastic force change value of the elastic part. And the arranged adjusting piece can realize synchronous locking and adjusting actions of the plurality of locking rods, so that the problem of different elastic forces of the elastic piece caused by different locking degrees of single locking rod can be effectively avoided, and the balanced stress of each position in the pile locking process is ensured.

Description

Technical Field

[0001] The utility model relates to an electric stack, in particular to a fuel cell electric stack. Background Art

[0002] A battery stack is a stack of multiple fuel cells, the purpose of which is to obtain a voltage suitable for practical applications.

[0003] The elastic components in the battery stack include: sealing rubber wire, gas diffusion layer GDL in the membrane electrode, bipolar plate (0.1mm stainless steel plate, through welding, 2 monopolar plates constitute 1 bipolar plate, but due to the thickness of 0.1mm stainless steel plate, there is a certain elasticity), etc. Many elastic components have inconsistent elastic moduli of different materials, resulting in inconsistent elastic behaviors of the battery stack after being compressed, which in turn leads to inconsistent elastic deformation after different elastic components show different elastic moduli and elastic behaviors during the locking process of the battery stack (whether it is bolt locking or bandage locking), which can easily cause the membrane electrode and bipolar plate in the battery stack to shift or slip during sealing. Although it is limited by external positioning and internal positioning behaviors, there is still a certain amount of slippage. If the slippage is serious, the positioning pin cannot be pulled out or the positioning device is difficult to remove. Utility Model Content

[0004] The purpose of the utility model is to provide a fuel cell stack to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A fuel cell stack, comprising:

[0007] An insulating upper plate and an insulating bottom plate, wherein a receiving space is formed between the insulating upper plate and the insulating bottom plate;

[0008] A battery stack is placed in the accommodation space;

[0009] An elastic member is placed in the accommodation space and abuts against the receiving plate at the bottom of the battery stack and the insulating bottom plate;

[0010] A plurality of locking rods, one end of which is connected to the insulating upper plate and the other end of which passes through the insulating bottom plate;

[0011] The adjusting member is placed in the built-in cavity formed on the insulating bottom plate and connected to the plurality of locking rods, and is used to cooperate with the locking rods to change the distance between the insulating upper plate and the insulating bottom plate to change the elastic force change value of the elastic member.

[0012] In the fuel cell stack as described above: an end of the locking rod facing the insulating bottom plate is formed with an external thread, and the locking rod is inserted into the built-in cavity in the insulating bottom plate and connected to the adjusting member.

[0013] The fuel cell stack as described above: the adjusting member comprises a plurality of rotating gears corresponding to the plurality of locking rods one by one, and the rotating gears are formed with internal threads threadedly connected to the external threads on the locking rods;

[0014] a toothed belt passing around the plurality of rotating gears, wherein the gear teeth on the toothed belt mesh with the rotating gears;

[0015] A driving unit is connected to the toothed belt and is used to drive the toothed belt to rotate.

[0016] The fuel cell stack as described above: the driving unit comprises:

[0017] Rotating a gear installed in the built-in cavity, wherein the gear is meshed with the toothed belt;

[0018] The rotating disk is located outside the built-in cavity and is coaxially fixed with the gear.

[0019] The fuel cell stack as described above: a placement groove is formed on the side of the insulating bottom plate away from the insulating upper plate, the side of the placement groove away from the insulating upper plate is open and blocked by a baffle so that the inner side of the placement groove forms the built-in cavity.

[0020] The fuel cell stack as described above: an embedded groove is formed on the baffle, and the turntable is placed in the embedded groove.

[0021] The fuel cell stack as described above: a knob is formed on the turntable.

[0022] The fuel cell stack as described above: the elastic member is a spring.

[0023] Compared with the prior art, the beneficial effects of the utility model are as follows: by arranging a receiving plate and multiple elastic parts at the bottom of the battery stack, the heights of the upper and lower end plates can be made uniform during the locking process of the battery stack, which can effectively correct the slippage behavior of the battery stack during the locking process caused by the different elastic moduli of the elastic components inside the battery stack. At the same time, the adjusting parts arranged can realize the synchronous locking and adjustment action of multiple locking rods, which can effectively avoid the problem of different elastic forces of elastic parts due to different locking degrees of a single locking rod, thereby ensuring balanced force at various positions during the locking process of the battery stack. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a fuel cell stack.

[0025] Figure 2This is a schematic diagram of the structure of the fuel cell stack from another angle.

[0026] Figure 3 This is a schematic diagram of the structure of the fuel cell stack after the baffle is removed.

[0027] Figure 4 This is a bottom view of the fuel cell stack after the baffle is removed.

[0028] Figure 5 A front view of a fuel cell stack.

[0029] Figure 6 This is a schematic diagram of the structure after the insulating base plate in the fuel cell stack is separated.

[0030] In the figure: 1-insulating upper plate, 2-insulating bottom plate, 3-locking rod, 4-baffle, 5-embedded groove, 6-knob, 7-battery stack, 8-placing groove, 9-toothed belt, 10-turntable, 11-gear, 12-rotating gear, 1201-internal thread, 13-receiving plate, 14-spring. DETAILED DESCRIPTION

[0031] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0032] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0033] In addition, in order to better illustrate the present application, numerous specific details are provided in the specific embodiments below. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, and elements well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0034] See also Figures 1 to 6 In an embodiment of the utility model, a fuel cell stack comprises:

[0035] An insulating upper plate 1 and an insulating bottom plate 2, wherein a receiving space is formed between the insulating upper plate 1 and the insulating bottom plate 2;

[0036] A battery stack 7 is placed in the accommodation space;

[0037] An elastic member is placed in the accommodating space and abuts against the receiving plate 13 at the bottom of the battery stack 7 and the insulating bottom plate 2. Preferably, the elastic member includes but is not limited to a spring 14;

[0038] A plurality of locking rods 3, one end of which is connected to the insulating upper plate 1 and the other end of which passes through the insulating bottom plate 2;

[0039] The adjusting member is placed in the built-in cavity formed on the insulating bottom plate 2 and connected to the plurality of locking rods 3, and is used to cooperate with the locking rods 3 to change the distance between the insulating upper plate 1 and the insulating bottom plate 2, so as to change the elastic force change value of the elastic member.

[0040] In this embodiment, a receiving plate 13 and a plurality of elastic parts are provided at the bottom of the battery stack 7, so that during the locking process of the battery stack 7, the heights of the upper and lower end plates can be uniform, which can effectively correct the slippage of the battery stack 7 during the locking process caused by the different elastic moduli of the elastic components inside the battery stack 7. At the same time, the adjusting parts provided can realize the synchronous locking and adjustment action of multiple locking rods 3, which can effectively avoid the problem of different elastic forces of elastic parts due to different locking degrees of a single locking rod 3, and ensure balanced force at various positions during the locking process of the battery stack 7.

[0041] Further, an external thread is formed on one end of the locking rod 3 facing the insulating base plate 2, and the locking rod 3 is inserted into the built-in cavity in the insulating base plate 2 and connected to the adjusting member. Exemplarily, in a specific embodiment, the adjusting member includes a plurality of rotating gears 12 corresponding one to one to the plurality of locking rods 3, and an internal thread 1201 is formed on the rotating gear 12 and threadedly connected to the external thread on the locking rod 3; a toothed belt 9 passes around the plurality of rotating gears 12, and the teeth on the toothed belt 9 are engaged with the rotating gear 12; a driving unit is connected to the toothed belt 9 and is used to drive the toothed belt 9 to rotate.

[0042] The toothed belt 9 is driven to rotate by a drive unit. When the toothed belt 9 rotates, multiple rotating gears 12 can be driven to rotate synchronously. When the rotating gear 12 rotates, it cooperates with the locking rod 3 to change the distance between the insulating upper plate 1 and the insulating bottom plate 2, thereby realizing the locking action. In the locking process, since one end of the locking rod 3 is fixed to the insulating upper plate 1, the rotating gear 12 will move axially relative to the locking rod 3 to realize the position change of the insulating bottom plate 2 relative to the insulating upper plate 1.

[0043] Of course, in the specific implementation process, the toothed belt 9 can be replaced by a chain. When a chain is used, the rotating gear 12 is a sprocket that cooperates with the chain.

[0044] It should be noted that the rotating gear 12 is rotatably mounted on the inner wall of the built-in cavity, and the rotating gear 12 is formed with a cylindrical through hole along its axial direction, and the internal thread 1201 is formed in the cylindrical through hole.

[0045] Furthermore, the driving unit includes a gear 11 rotatably installed in the built-in cavity, the gear 11 meshing with the toothed belt 9; a turntable 10 located outside the built-in cavity and coaxially fixed with the gear 11, wherein a knob 6 is also formed on the turntable 10, and the turntable 10 is driven to rotate by rotating the knob 6, thereby realizing the driving of the gear 11.

[0046] When the toothed belt 9 adopts a sprocket, the gear 11 also needs to be used in conjunction with the sprocket.

[0047] See also Figure 1 and Figure 3 A placement groove 8 is formed on the side of the insulating bottom plate 2 away from the insulating upper plate 1. The placement groove 8 is open on the side away from the insulating upper plate 1 and is blocked by a baffle 4 so that the inner side of the placement groove 8 forms the built-in cavity, wherein the baffle 4 can be fixed to the insulating bottom plate 2 by bolts.

[0048] Furthermore, an embedded groove 5 is formed on the baffle 4, and the turntable 10 is placed in the embedded groove 5. The embedded groove 5 can be used to embed the turntable 10 in the embedded groove 5, ensuring that the turntable 10 does not protrude from the lower bottom surface of the baffle 4.

[0049] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0050] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A fuel cell stack, characterized in that: include: An insulating upper plate (1) and an insulating bottom plate (2), wherein a receiving space is formed between the insulating upper plate (1) and the insulating bottom plate (2); A battery stack (7) is placed in the accommodation space; An elastic member is placed in the accommodation space and abuts against a receiving plate (13) at the bottom of the battery stack (7) and the insulating bottom plate (2); A plurality of locking rods (3), one end of which is connected to the insulating upper plate (1) and the other end of which passes through the insulating bottom plate (2); The adjusting member is placed in a built-in cavity formed on the insulating bottom plate (2) and is connected to the plurality of locking rods (3) and is used to cooperate with the locking rods (3) to change the distance between the insulating upper plate (1) and the insulating bottom plate (2) so as to change the elastic force variation value of the elastic member.

2. A fuel cell stack according to claim 1, characterized in that: An external thread is formed on one end of the locking rod (3) facing the insulating bottom plate (2); the locking rod (3) is inserted into the built-in cavity in the insulating bottom plate (2) and is connected to the adjusting member.

3. A fuel cell stack according to claim 2, characterized in that: The adjusting member comprises a plurality of rotating gears (12) corresponding one to one with the plurality of locking rods (3); the rotating gears (12) are provided with internal threads (1201) threadably connected to the external threads on the locking rods (3); A toothed belt (9) passing around the plurality of rotating gears (12), wherein the gear teeth on the toothed belt (9) mesh with the rotating gears (12); A driving unit is connected to the toothed belt (9) and is used to drive the toothed belt (9) to rotate.

4. A fuel cell stack according to claim 3, characterized in that: The driving unit comprises: Rotating a gear (11) installed in the built-in cavity, wherein the gear (11) meshes with the toothed belt (9); A rotating disk (10) is located outside the built-in cavity and is coaxially fixed with the gear (11).

5. A fuel cell stack according to claim 4, characterized in that: A placement groove (8) is formed on a side of the insulating bottom plate (2) away from the insulating upper plate (1); the side of the placement groove (8) away from the insulating upper plate (1) is open and blocked by a baffle (4) so ​​that the inner side of the placement groove (8) forms the built-in cavity.

6. A fuel cell stack according to claim 5, characterized in that: An embedded groove (5) is formed on the baffle (4), and the rotating disk (10) is placed in the embedded groove (5).

7. A fuel cell stack according to claim 4, characterized in that: A knob (6) is formed on the turntable (10).

8. A fuel cell stack according to claim 1, characterized in that: The elastic member is a spring (14).

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