CN-121994610-A - Accelerated aging testing device for fuel cell sealing structure

CN121994610ACN 121994610 ACN121994610 ACN 121994610ACN-121994610-A

Abstract

The invention relates to the technical field of battery detection, in particular to an accelerated aging testing device for a fuel cell sealing structure, which comprises an upper pressing plate and a bottom plate, wherein the upper pressing plate and the bottom plate are rectangular plates with the same shape and size, a placing groove group is arranged on one side, close to each other, of the bottom plate and the upper pressing plate, a plurality of placing groove groups are arranged on the side edges of the bottom plate and the upper pressing plate, a first mounting cavity and a second mounting cavity are arranged in the upper pressing plate and the bottom plate, the first mounting cavity is arranged below the placing groove group, the first mounting cavity is arranged on one side, close to the outer edges, of the upper pressing plate and the bottom plate, mounting grooves are formed in the edges of the upper pressing plate and the bottom plate, and a feeding component is arranged in the first mounting cavity and the second mounting cavity and used for guiding a medium into the placing groove group. The invention realizes more accurate prediction of the effective life of the fuel cell sealing material by realizing a test environment which is closer to the actual working condition of the fuel cell.

Inventors

LI RUIYU
ZHAN CHENGBO
LIU XIAOMING
CAI YUN
LIU YILIN
ZHU YUDI
MENG RANRAN

Assignees

氢新科技(深圳)有限公司

Dates

Publication Date: 20260508
Application Date: 20240315

Claims (9)

1. The accelerated aging testing device for the fuel cell sealing structure comprises an upper pressing plate (1) and a bottom plate (2), and is characterized in that the upper pressing plate (1) and the bottom plate (2) are rectangular plates with the same shape and size, a placing groove group (3) is formed in one side, close to each other, of the bottom plate (2) and the upper pressing plate (1), and a plurality of placing groove groups (3) are arranged on the side edges of the bottom plate (2) and the upper pressing plate (1); The device comprises an upper pressing plate (1) and a bottom plate (2), wherein a first installation cavity (4) and a second installation cavity (5) are formed in the upper pressing plate (1) and the bottom plate (2), the first installation cavity (4) and the second installation cavity (5) are arranged below a placing groove group (3), the first installation cavity (4) is formed in one side, close to the outer edge, of the upper pressing plate (1) and the bottom plate (2), the edges of the upper pressing plate (1) and the bottom plate (2) are provided with installation grooves, a feeding assembly (6) is arranged in the first installation cavity (4) and the second installation cavity (5), and the feeding assembly (6) is used for guiding a medium into the placing groove group (3); The feeding assembly (6) comprises a guide block (61), a flow pipe (62), a guide pipe (63) and a feeding pipe (64), wherein the two feeding pipes (64) are clamped inside the mounting groove, the two feeding pipes (62) are fixedly connected to the end parts of the feeding pipes (64) and respectively penetrate through the first mounting cavity (4) and the second mounting cavity (5), the guide block (61) is communicated with the flow pipe (62) and located inside the first mounting cavity (4), the guide pipe (63) is fixedly connected to the end parts of the two flow pipes (62), and the flow pipe (62) is wavy and located inside the second mounting cavity (5).
2. The accelerated aging testing device for the fuel cell sealing structure according to claim 1, wherein the placement groove group (3) comprises a cylindrical groove (31) and a dumbbell groove (32), the cylindrical groove (31) and the dumbbell groove (32) are arranged on one side, close to each other, of the upper pressing plate (1) and the bottom plate (2), the cylindrical groove (31) is located in the middle of the dumbbell groove (32), and the dumbbell groove (32) is close to the edges of the upper pressing plate (1) and the bottom plate (2).
3. The accelerated aging testing device for fuel cell sealing structures according to claim 2, wherein the first mounting cavity (4) is a rectangular cavity and is located below the dumbbell groove (32), and the second mounting cavity (5) is cylindrical and is located below the cylindrical groove (31).
4. The accelerated aging testing device for the fuel cell sealing structure according to claim 2, wherein the edges of the cylindrical groove (31) and the dumbbell groove (32) are fixedly connected with sealing strips (7), and the sealing strips (7) are made of elastic materials and are used for sealing the connection gap between the cylindrical groove (31) and the dumbbell groove (32).
5. The accelerated aging testing device for the fuel cell sealing structure according to claim 1, wherein a connecting component (8) is arranged between the upper pressing plate (1) and the bottom plate (2), the connecting component (8) is used for connecting and fixing the upper pressing plate (1) and the bottom plate (2), the upper pressing plate (1) and the bottom plate (2) are fixedly connected, and a plurality of connecting components (8) are arranged among a plurality of placing groove groups (3).
6. The accelerated aging testing device for the fuel cell sealing structure according to claim 5, wherein the connecting assembly (8) comprises a fixing bolt (81) and a fixing groove (82), the fixing groove (82) is formed in the upper side of the bottom plate (2), a threaded hole corresponding to the fixing groove (82) is formed in the upper pressing plate (1), and the fixing bolt (81) penetrates through the threaded hole to be in threaded connection with the fixing groove (82).
7. The accelerated aging testing device for the fuel cell sealing structure according to claim 1, wherein a base (10) is arranged below the bottom plate (2), the base (10) is arranged below the bottom plate (2), a limiting ring (11) is fixedly connected to the surface of the base, and the limiting ring (11) is used for limiting the position of the bottom plate (2).
8. The accelerated aging testing device for the fuel cell sealing structure according to claim 1, wherein a lifting assembly (9) is arranged on the base (10), and the lifting assembly (9) is used for driving the upper pressing plate (1) to move up and down.
9. The accelerated aging testing device for the fuel cell sealing structure according to claim 8, wherein the lifting assembly (9) comprises telescopic columns (91), connecting frames (92) and connecting seats (93), four telescopic columns (91) are vertically and fixedly connected to four corners of the base (10), two connecting frames (92) are respectively and fixedly connected to the upper ends of one telescopic column (91), the connecting frames (92) are triangular, the upper ends of the connecting seats (93) are fixedly connected to the bending positions of the connecting frames (92), and the bottom surfaces of the connecting frames are fixedly connected to the upper pressing plate (1).

Description

Accelerated aging testing device for fuel cell sealing structure Technical Field The invention relates to the technical field of battery detection, in particular to an accelerated aging testing device for a fuel cell sealing structure. Background For the low-temperature and high-temperature PEM fuel cell field, the durability of the rubber sealing material under the actual working condition has an important influence on the long-term operation stability of the whole electric pile, so that the aging characteristic of the sealing material can be tested to provide great help for predicting the working life of the electric pile. Sealing materials currently used in fuel cells are tested mainly by accelerated aging tests. Chinese patent CN111458225B discloses a life prediction method for proton exchange membrane fuel cell sealing material, the environmental simulation method is that a cylindrical sample is compressed between clamps, generally between 0.5mpa and 1.5mpa, and placed in a closed reaction kettle containing a simulation solution (cooling water solution collected after PEM fuel cell works for a period of time or mixed solution of HF 1.8x10-6 mol/L and HF 1.2x10-6 mo/L H SO 4), and then placed in a constant temperature heating device. The method has adjustable influencing factors including temperature, assembly pressure and solution concentration, wherein the temperature adjustment is realized by changing the set temperature of the constant temperature device, and the pressure adjustment is realized by changing the fastening and fixing bolt force of the clamp. Sealing materials currently used in fuel cells are tested mainly by accelerated aging tests. The test bars are placed in a reaction kettle to simulate a high temperature and high pressure environment, and cooling liquid generated by the operation of the PEM fuel cell or cooling liquid of a dilute sulfuric acid simulated cell is added. In the prior art, the fuel gas and the cooling liquid continuously circulate, the components are relatively stable, the whole material to be tested is contacted with the simulation solution at the same time, the hydrogen, air and cooling liquid flow channels in the fuel cell are mutually independent, and different areas of the sealing material are contacted with different cavity channels at the same time respectively, and the contact area with the cooling liquid is the smallest, and the contact area with the hydrogen and the air is larger and is close. Disclosure of Invention The invention aims to solve the defect that in the prior art, a reaction kettle is difficult to simulate the environment of pure hydrogen atmosphere, but hydrogen is necessarily present under the actual working condition of a fuel cell, and provides an accelerated aging test device for a fuel cell sealing structure. In order to achieve the above purpose, the present invention adopts the following technical scheme: the accelerated aging testing device for the fuel cell sealing structure comprises an upper pressing plate and a bottom plate, wherein the upper pressing plate and the bottom plate are rectangular plates with the same shape and size, a placing groove group is arranged on one side, close to each other, of the bottom plate and the upper pressing plate, and a plurality of placing groove groups are arranged on the side edges of the bottom plate and the upper pressing plate; The device comprises an upper pressing plate, a bottom plate, a placing groove group, a feeding assembly, a first installation cavity, a second installation cavity, a first installation cavity and a second installation cavity, wherein the first installation cavity and the second installation cavity are formed in the upper pressing plate and the bottom plate, the first installation cavity is arranged below the placing groove group, the first installation cavity is arranged on one side, close to the outer edge, of the upper pressing plate and the bottom plate, the edges of the upper pressing plate and the bottom plate are provided with installation grooves, and the feeding assembly is arranged in the first installation cavity and the second installation cavity and is used for guiding a medium into the placing groove group; The feeding assembly comprises a guide block, a flow pipe, a delivery pipe and a feeding pipe, wherein the two feeding pipes are clamped inside the mounting groove, the two flow pipes are fixedly connected to the end part of the feeding pipe and respectively penetrate through the first mounting cavity and the second mounting cavity, the guide block is communicated with the flow pipe and located inside the first mounting cavity, the delivery pipe is fixedly connected to the end parts of the two flow pipes, and the flow pipe is wavy and located inside the second mounting cavity. Preferably, the placement groove group comprises a cylindrical groove and a dumbbell groove, the cylindrical groove and the dumbbell groove are arranged on one side, close to each