Pressing force adjustable proton exchange membrane hydrogen fuel cell stack

Abstract

The utility model relates to the field of fuel cells, in particular to an adjustable pressing force type proton exchange membrane hydrogen fuel cell stack. Comprising a front end plate, a pressure regulating assembly, a rear end plate and a reactor core, the pressure adjusting assembly comprises a plurality of upper end pressure adjusting bandages, a plurality of upper end bolts, a plurality of lower end pressure adjusting bandages, a plurality of lower end bolts, an adjusting piece and a driving piece. According to the utility model, the adjusting piece can drive the upper-end bolt and the lower-end bolt to move oppositely or reversely when rotating through the matching of the threads with different screwing directions, so as to drive the upper-end pressure-adjusting binding band and the lower-end pressure-adjusting binding band to move oppositely or reversely, thereby realizing the pressing force on the cell stack; the pressing force on the cell stack can be adjusted according to specific requirements by adjusting the rotating direction of the driving piece, the pressure adjusting assembly is convenient to replace, the whole cell stack does not need to be disassembled, and only components in the pressure adjusting assembly need to be replaced independently.

Description

Technical Field

[0001] This utility model relates to the field of fuel cells, and in particular to an adjustable pressure proton exchange membrane hydrogen fuel cell stack. Background Technology

[0002] To ensure the normal operation of a proton exchange membrane (PEM) hydrogen fuel cell stack, a certain pressure needs to be maintained between the bipolar plates and the membrane electrode assembly (MEA). Currently, commercial stacks use disc springs to maintain this clamping force. However, with long-term operation of the PEM hydrogen fuel cell stack, the disc springs will creep and shorten, making it impossible to continuously maintain the clamping force required for normal stack operation. This can easily lead to performance degradation and seal failure. Moreover, the disc springs cannot actively adjust the stack; they can only passively adjust through their own deformation and elasticity, which cannot adapt to the pressure adjustments required by the stack. Furthermore, if a disc spring malfunctions, the entire stack must be disassembled to replace it, which is complex, time-consuming, and labor-intensive. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing an adjustable pressure proton exchange membrane hydrogen fuel cell stack.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] An adjustable pressure proton exchange membrane hydrogen fuel cell stack is provided, comprising: a front end plate, a pressure regulating component, a rear end plate, and a core disposed between the front end plate and the rear end plate;

[0006] The pressure regulating assembly includes: a plurality of upper pressure regulating straps, a plurality of upper bolts located at the bottom of the upper pressure regulating straps, a plurality of lower pressure regulating straps, a plurality of lower bolts located at the top of the lower pressure regulating straps, an adjusting member connecting the upper bolts and the lower bolts, and a driving member driving the adjusting member to rotate; the upper pressure regulating straps and the lower pressure regulating straps respectively drive the front end plate and the rear end plate to perform linear reciprocating motion.

[0007] Preferably, the upper pressure adjusting strap is U-shaped; the inner wall of the top end of the upper pressure adjusting strap is attached to the top end of the front end plate, and the upper bolts are fixedly provided on both sides of the bottom end of the upper pressure adjusting strap.

[0008] Preferably, the lower pressure adjusting strap is U-shaped; the bottom inner wall of the lower pressure adjusting strap is attached to the bottom of the rear end plate, and the lower pressure adjusting strap is fixedly provided with lower bolts on both sides of the top end.

[0009] Preferably, the upper bolt has a right-hand external thread, and the lower bolt has a left-hand external thread.

[0010] More preferably, the top end of the adjusting member is provided with a right-hand internal thread that mates with the right-hand external thread, and the bottom end is provided with a left-hand internal thread that mates with the left-hand external thread.

[0011] Preferably, it further includes a steering adjustment component that connects the adjustment component and the drive component.

[0012] More preferably, the steering adjustment member includes: a first gear sleeved on the outside of the adjustment member and fixedly connected to the adjustment member, and a second gear meshing with the first gear; the second gear sleeved on the outside of the output end of the drive member and fixedly connected to the output end of the drive member.

[0013] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0014] This invention utilizes threaded connections with different rotation directions to allow the adjusting component to rotate, causing the upper and lower bolts to move in opposite directions. This, in turn, causes the upper and lower pressure regulating straps to move in opposite directions, thereby achieving a clamping force on the battery stack. The clamping force on the battery stack can be adjusted according to specific needs by adjusting the rotation direction of the driving component. Furthermore, the pressure regulating component of this invention is easy to replace, requiring no disassembly of the entire battery stack; only the components within the pressure regulating component need to be replaced. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the basic structure of an adjustable pressure proton exchange membrane hydrogen fuel cell stack according to one embodiment of the present invention.

[0016] The reference numerals in the figure include:

[0017] Front end plate 1; upper pressure regulating strap 2; upper bolt 3; adjusting component 4; first gear 5; second gear 6; driving component 7; rear end plate 8; lower pressure regulating strap 9; lower bolt 10; core 11. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0021] Example

[0022] This embodiment provides an adjustable pressure proton exchange membrane hydrogen fuel cell stack, including: a front end plate 1, a pressure regulating component, a rear end plate 8, and a core 11 disposed between the front end plate 1 and the rear end plate 8;

[0023] The pressure regulating assembly includes: a plurality of upper pressure regulating straps 2, a plurality of upper bolts 3 located at the bottom of the upper pressure regulating straps 2, a plurality of lower pressure regulating straps 9, a plurality of lower bolts 10 located at the top of the lower pressure regulating straps 9, an adjusting member 4 connecting the upper bolts 3 and the lower bolts 10, a driving member 7 driving the adjusting member 4 to rotate, and a steering adjusting member connecting the adjusting member 4 and the driving member 7; the upper pressure regulating straps 2 and the lower pressure regulating straps 9 respectively drive the front end plate 1 and the rear end plate 8 to perform linear reciprocating motion;

[0024] Both the upper pressure adjusting strap 2 and the lower pressure adjusting strap 9 are U-shaped. The inner wall of the top end of the upper pressure adjusting strap 2 is attached to the top end of the front end plate 1. The upper bolt 3 is fixedly provided on both sides of the bottom end of the upper pressure adjusting strap 2, and the thread of the upper bolt 3 is a right-hand external thread. The inner wall of the bottom end of the lower pressure adjusting strap 9 is attached to the bottom end of the rear end plate 8. The lower bolt 10 is fixedly provided on both sides of the top end of the lower pressure adjusting strap 9, and the thread of the lower bolt 10 is a left-hand external thread. The top end of the adjusting member 4 is provided with a right-hand internal thread that mates with the right-hand external thread, and the bottom end is provided with a left-hand internal thread that mates with the left-hand external thread. The steering adjustment member includes: a first gear 5 sleeved on the outside of the adjusting member 4 and fixedly connected to the adjusting member 4, and a second gear 6 meshing with the first gear 5. The second gear 6 is sleeved on the outside of the output end of the driving member 7 and fixedly connected to the output end of the driving member 7.

[0025] In a preferred embodiment, both the upper pressure adjusting strap 2 and the lower pressure adjusting strap 9 are steel straps.

[0026] In a preferred embodiment, the driving component 7 is an electric motor.

[0027] Working principle:

[0028] The upper pressure regulating strap 2 and the lower pressure regulating strap 9 correspond one-to-one. The front plate 1, the core 11, and the rear plate 8 are fitted into the frame formed by the upper pressure regulating strap 2 and the lower pressure regulating strap 9. The upper bolt 3 at the bottom of the upper pressure regulating strap 2 and the lower bolt 10 at the top of the lower pressure regulating strap 9 are connected by the adjusting component 4. The operator adjusts the direction of the output end of the drive component 7 according to specific needs. The rotation of the drive component 7 drives the second gear 6 to rotate, which in turn drives the first gear 5 to rotate. The first gear 5 drives the adjusting component 4 to rotate. Through the engagement of the thread direction, the upper bolt 3 and the lower bolt 10 move towards each other or away from each other, thereby adjusting the tension or relaxation of the upper pressure regulating strap 2 and the lower pressure regulating strap 9.

[0029] In summary, this utility model utilizes the threaded engagement with different rotation directions to enable the adjusting component to rotate and drive the upper and lower bolts to move in opposite directions, thereby driving the upper and lower pressure regulating straps to move in opposite directions and achieve a clamping force on the battery stack. The clamping force on the battery stack can be adjusted according to specific needs by adjusting the rotation direction of the driving component. Furthermore, the pressure regulating component of this utility model is easy to replace, without disassembling the entire battery stack; only the components in the pressure regulating component need to be replaced.

[0030] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pressure-adjustable proton exchange membrane hydrogen fuel cell stack, characterized by, The utility model relates to a kind of nuclear reactor, including: Front end plate (1), pressure regulating assembly, rear end plate (8) and core (11) between the front end plate (1) and the rear end plate (8); Wherein, the pressure regulating assembly includes: several upper end pressure regulating belts (2), several upper end bolts (3) arranged at the bottom end of the upper end pressure regulating belt (2), several lower end pressure regulating belts (9), several lower end bolts (10) arranged at the top end of the lower end pressure regulating belt (9), adjusting piece (4) connected the upper end bolt (3) and the lower end bolt (10), and driving piece (7) driving the adjusting piece (4) rotation;The upper end pressure regulating belt (2) and the lower end pressure regulating belt (9) drive the front end plate (1) and the rear end plate (8) to carry out linear reciprocating motion respectively.

2. The adjustable compression proton exchange membrane hydrogen fuel cell stack of claim 1, wherein, The upper end pressure regulating belt (2) is "U” type;The top end inner wall of the upper end pressure regulating belt (2) is attached to the top end of the front end plate (1), and the bottom end of the upper end pressure regulating belt (2) is fixedly provided with the upper end bolt (3) on both sides.

3. The adjustable compression proton exchange membrane hydrogen fuel cell stack of claim 1, wherein, The lower end pressure regulating belt (9) is "U” type;The bottom end inner wall of the lower end pressure regulating belt (9) is attached to the bottom end of the rear end plate (8), and the top end of the lower end pressure regulating belt (9) is fixedly provided with the lower end bolt (10) on both sides.

4. The adjustable compression proton exchange membrane hydrogen fuel cell stack of claim 1, wherein, The thread of the upper end bolt (3) is right-handed external thread, and the thread of the lower end bolt (10) is left-handed external thread.

5. The adjustable compression proton exchange membrane hydrogen fuel cell stack of claim 4, wherein, The top end of the adjusting piece (4) is provided with right-handed internal thread matched with the right-handed external thread, and the bottom end is provided with left-handed internal thread matched with left-handed external thread.

6. The adjustable-clamp-force proton exchange membrane hydrogen fuel cell stack of claim 1, wherein, Further including: Steering adjustment piece connecting the adjusting piece (4) and the driving piece (7).

7. The adjustable compression proton exchange membrane hydrogen fuel cell stack of claim 6, wherein, The steering adjustment piece includes: first gear (5) being sleeved outside the adjusting piece (4) and being fixedly connected with the adjusting piece (4), and second gear (6) being engaged with the first gear (5);The second gear (6) is sleeved outside the output end of the driving piece (7) and is fixedly connected with the output end of the driving piece (7).

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