An apparatus for measuring the resistance distribution of sheet-like stacked materials

Abstract

The present application discloses a device for measuring the resistance distribution of a sheet-like stacked material, which includes a bottom plate, a support block, a U-shaped slider assembly, a microprobe, and a ball screw assembly; the support block includes a first support block and a second support block that are arranged in parallel on the bottom plate; one end of the U-shaped slider assembly is slidably connected to the first support block, and the other end is slidably connected to the second support block; the ball screw assembly is arranged on the bottom plate, and the ball screw assembly is arranged between the first support block and the second support block, and the ball screw assembly abuts against the U-shaped slider assembly; the microprobe includes a first microprobe and a second microprobe, the first microprobe is arranged on the top of the U-shaped slider assembly, and the second microprobe is arranged on the bottom of the U-shaped slider assembly. The present application can measure the resistance distribution of each part of the stack during the stack reaction, providing data support for the research of the stack.

Description

Technical Field

[0001] The present invention relates to the field of measurement technology, and particularly to a device for measuring the resistance distribution of sheet-like stacked materials. Background Art

[0002] Fuel cells are usually formed by stacking and assembling dozens to hundreds of bipolar plates and membrane electrode assemblies. One membrane electrode is sandwiched between two bipolar plates to form a single cell, and dozens or even hundreds of single cells are connected in series to form a complete stack; the more single cells are stacked, the more output power the stack has. However, a large amount of heat is released during the reaction of fuel cells. The more plates there are in the stack, the more heat is generated during operation, and then the heat will accumulate inside the stack, causing the stack temperature to rise. When the stack temperature is too high, it will affect the reaction rate of the stack, thus affecting the performance of the stack. Small temperature sensors cannot be inserted into the plates to measure the temperature, and if temperature sensors are inserted into the plates, it may affect the sealing of the stack, and thus affect the performance of the stack. Therefore, in the prior art, it is very difficult to measure the temperature distribution of each part of the stack through temperature sensors during the reaction of the stack. Summary of the Invention

[0003] Based on this, an embodiment of the present invention provides a device for measuring the resistance distribution of sheet-like stacked materials, aiming to solve the problem that it is very difficult to measure the temperature distribution of each part of the stack through temperature sensors during the reaction of the stack in the prior art. Through the device of the present application, the resistance distribution of each part of the stack can be measured during the reaction of the stack, and the temperature distribution of each part of the stack can be calculated by fitting according to the resistance distribution of each part of the stack measured by the device of the present application.

[0004] To achieve the above object, the embodiment of the present invention proposes the following technical solution:

[0005] A device for measuring the resistance distribution of sheet-like stacked materials, suitable for measuring the resistance of sheet-like stacked materials, includes a bottom plate, a support block, a U-shaped slider assembly, a microprobe, and a ball screw assembly;

[0006] The support block includes a first support block and a second support block arranged in parallel on the bottom plate; one end of the U-shaped slider assembly is slidably connected to the first support block, and the other end is slidably connected to the second support block;

[0007] The ball screw assembly is arranged on the bottom plate, and the ball screw assembly is arranged between the first support block and the second support block, and the ball screw assembly abuts against the U-shaped slider assembly;

[0008] The micro-probe includes a first micro-probe and a second micro-probe. The first micro-probe is disposed on the top of the U-shaped slider assembly, and the second micro-probe is disposed on the bottom of the U-shaped slider assembly.

[0009] As a preferred embodiment, the U-shaped slider assembly includes a U-shaped frame, a first cross bar slidably connected to the top end of the U-shaped frame, and a lower slider disposed at the bottom of the U-shaped frame; the lower slider includes a first lower slider and a second lower slider symmetrically arranged; one end of the bottom of the U-shaped frame is slidably connected to the first support block, and the other end is slidably connected to the second support block, and the bottom of the U-shaped frame is fixedly connected to the ball screw assembly.

[0010] As a preferred embodiment, first chutes are symmetrically arranged at both ends of the U-shaped frame, and the first cross bar is slidably connected in the first chutes.

[0011] As a preferred embodiment, a first connection block is disposed on the side of the first cross bar close to the ball screw assembly, and the first micro-probe is disposed on the side of the first connection block close to the ball screw assembly.

[0012] As a preferred embodiment, second chutes are symmetrically arranged on the first lower slider and the second lower slider; the second micro-probe is disposed on the side of the second connection block close to the first connection block; both ends of the second connection block are slidably connected in the second chutes.

[0013] As a preferred embodiment, the first micro-probe and the second micro-probe are symmetrically arranged; both the first micro-probe and the second micro-probe include multiple rows of micro-probes arranged in parallel.

[0014] As a preferred embodiment, a first hollow is disposed on the first support block, and a first U-shaped frame slide rail is disposed in the first hollow; a second hollow is disposed on the second support block, and a second U-shaped frame slide rail is disposed in the second hollow; the first U-shaped frame slide rail and the second U-shaped frame slide rail are symmetrically arranged; one end of the bottom of the U-shaped frame is slidably connected to the first U-shaped frame slide rail, and the other end is slidably connected to the second U-shaped frame slide rail.

[0015] As a preferred embodiment, one end of the sheet-like stacked material is disposed at the top end of the first support block, and the other end is disposed at the top end of the second support block; a gap adapted to the sheet-like stacked material is disposed in the U-shaped frame.

[0016] As a preferred embodiment, the ball screw assembly includes a base, a ball screw, and a connecting plate. The base is disposed on the bottom plate. A groove is provided on the base, and the ball screw is disposed in the groove. Base slide rails are provided on both sides of the base, and the connecting plate is slidably connected to the base slide rails. The connecting plate is slidably connected to the ball screw. The side of the connecting plate away from the base is fixedly connected to the U-shaped frame.

[0017] As a preferred embodiment, the ball screw is a precision ball screw; the sheet-like stacked material is preferably a fuel cell stack.

[0018] Through the device of the present application, it is possible to measure the resistance distribution of each part of the stack during the reaction of the stack. The resistance distribution of each part of the stack measured according to the device of the present application can be used to fit and calculate the temperature distribution of each part of the stack, providing data support and guidance for the design and research of the stack. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0020] Figure 1 It is a schematic structural diagram of the device for measuring the resistance distribution of a sheet-like stacked material according to an embodiment of the present invention;

[0021] Figure 2 For Figure 1 It is a schematic structural diagram of the device for measuring the resistance distribution of a sheet-like stacked material with the sheet-like stacked material removed;

[0022] Figure 3 For Figure 1 It is a schematic structural diagram of the ball screw assembly.

[0023] The realization of the object of the present invention, its functional features and advantages will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0025] It should be noted that if there are directional indications (such as up, down, left, right, front, back, top, bottom...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0026] In this application, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0027] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0029] In the prior art, the single-piece electrode plate of the stack is very thin, mostly only more than 1 mm, and it is impossible for a small temperature sensor to be inserted into the electrode plate to measure the temperature; and if a temperature sensor is inserted into the electrode plate, it may affect the mechanical strength of the electrode plate and the sealing performance of the stack, thereby affecting the performance of the stack. Therefore, in the prior art, it is very difficult to measure the temperature distribution of each part of the stack by traditional measurement methods such as temperature sensors during the reaction of the stack. To solve the above technical problems, the present invention proposes a device for measuring the resistance distribution of sheet-like stacked materials.

[0030] As Figures 1 to 3As shown in the figure, a device for measuring the resistance distribution of a sheet-like stacked material proposed in an embodiment of the present invention is applicable to measuring the resistance of the sheet-like stacked material 100, and includes a bottom plate 10, a support block 20, a U-shaped slider assembly 30, a microprobe 40, and a ball screw assembly 50;

[0031] The support block 20 includes a first support block 21 and a second support block 22 arranged in parallel on the bottom plate 10; one end of the U-shaped slider assembly 30 is slidably connected to the first support block 21, and the other end is slidably connected to the second support block 22;

[0032] The ball screw assembly 50 is arranged on the bottom plate 10, and the ball screw assembly 50 is arranged between the first support block 21 and the second support block 22, and the ball screw assembly 50 abuts against the U-shaped slider assembly 30;

[0033] The microprobe 40 includes a first microprobe 41 and a second microprobe 42. The first microprobe 41 is arranged on the top of the U-shaped slider assembly 30, and the second microprobe 42 is arranged on the bottom of the U-shaped slider assembly 30.

[0034] As a preferred embodiment, the U-shaped slider assembly 30 includes a U-shaped frame 31, a first cross bar 32 slidably connected to the top end of the U-shaped frame 31, and a lower slider 33 arranged at the bottom of the U-shaped frame 31; the lower slider 33 includes a first lower slider 331 and a second lower slider 332 symmetrically arranged; one end of the bottom of the U-shaped frame 31 is slidably connected to the first support block 21, and the other end is slidably connected to the second support block 22, and the bottom of the U-shaped frame 31 is fixedly connected to the ball screw assembly 50.

[0035] By slidably connecting the U-shaped frame 31 with the support block 20, the support block 20 can be adjusted and placed according to the length of the sheet-like stacked material 100 (such as an electric stack) to be applicable to measuring sheet-like stacked materials 100 of different lengths. At the same time, by supporting the sheet-like stacked material 100 with the support block 20, the measurement area of the sheet-like stacked material 100 is made to be overhead, so as to meet the requirement that the first microprobe 41 and the second microprobe 42 can respectively vertically insert into the sheet-like stacked material 100 from the up and down directions for resistance measurement. The support block 20 can ensure that the device has a high degree of placement freedom, which is convenient for installation in a limited space, especially on a test bench with a large number of pipelines.

[0036] As a preferred embodiment, first sliding grooves 311 are symmetrically arranged at both ends of the U-shaped frame 31, and the first cross bar 32 is slidably connected in the first sliding grooves 311. Through the first sliding grooves 311, the first microprobe 41 can vertically move and be fixed in the up and down direction of the sheet-like stacked material 100.

[0037] As a preferred embodiment, a first connection block 34 is provided on the side of the first cross bar 32 close to the ball screw assembly 50, and the first micro probe 41 is arranged on the side of the first connection block 34 close to the ball screw assembly 50.

[0038] As a preferred embodiment, second chutes 333 are symmetrically arranged on the first lower slider 331 and the second lower slider 332; the second micro probe 42 is arranged on the side of the second connection block 35 close to the first connection block 34; both ends of the second connection block 35 are slidably connected in the second chutes 333. Through the first lower slider 331 and the second lower slider 332, the second micro probe 42 can be moved and fixed in the vertical direction.

[0039] As a preferred embodiment, the first micro probe 41 and the second micro probe 42 are symmetrically arranged; both the first micro probe 41 and the second micro probe 42 include multiple rows of micro probes arranged in parallel. By arranging multiple rows of micro probes, the resistance distribution values of multiple sheet materials of the sheet stack material 100 can be measured at one time, effectively reducing the measurement workload, improving the measurement efficiency, and saving time and effort. Specifically, in the embodiment of the present application, both the first micro probe 41 and the second micro probe 42 include three rows of micro probes arranged in parallel, so that the resistance of three plates can be measured simultaneously by the three rows of first micro probes 41 arranged in parallel and the three rows of second micro probes 42 arranged in parallel. In other embodiments, four rows, five rows or even more rows of micro probes can also be arranged according to actual use needs.

[0040] As a preferred embodiment, a first hollow 211 is provided on the first support block 21, and a first U-shaped frame slide rail 212 is arranged in the first hollow 211; a second hollow 221 is provided on the second support block 22, and a second U-shaped frame slide rail 222 is arranged in the second hollow 221; the first U-shaped frame slide rail 212 and the second U-shaped frame slide rail 222 are symmetrically arranged; one end of the bottom of the U-shaped frame 31 is slidably connected to the first U-shaped frame slide rail 212, and the other end is slidably connected to the second U-shaped frame slide rail 222.

[0041] As a preferred embodiment, one end of the sheet stack material 100 is arranged at the top end of the first support block 21, and the other end is arranged at the top end of the second support block 22; a gap adapted to the sheet stack material 100 is arranged in the U-shaped frame 31.

[0042] As a preferred embodiment, the ball screw assembly 50 includes a base 51, a ball screw 52 and a connecting plate 53. The base 51 is disposed on the bottom plate 10. A groove (not labeled in the figure) is provided on the base 51, and the ball screw 52 is disposed in the groove. Base slide rails 511 are provided on both sides of the base 51, and the connecting plate 53 is slidably connected to the base slide rails 511. The connecting plate 53 is slidably connected to the ball screw 52. The side surface of the connecting plate 53 away from the base 51 is fixedly connected to the U-shaped frame 31.

[0043] The thickness of the anode and cathode plates of the fuel cell stack is relatively thin. Through the ball screw assembly, the requirement for the fine movement of the probe can be met when measuring the resistance between different plates, so that the micro-probe can be accurately aligned between the gaps of two plates. The rotation of the ball screw drives the U-shaped frame to move horizontally, which can ensure that the micro-probe is accurately positioned on both side surfaces of each plate, and ensure that the micro-probe can measure the resistance of each plate of the fuel cell stack.

[0044] As a preferred embodiment, the ball screw 52 is a precision ball screw. The precision of the ball screw 52 is less than the thickness of each sheet material (such as a plate) of the sheet stack material 100, so that the micro-probe can be accurately moved to the horizontal position of any sheet material.

[0045] In the embodiment of the present application, the sheet stack material 100 is preferably a fuel cell stack. It can be understood that in other embodiments, the sheet stack material 100 can also be other sheet stack materials.

[0046] When using the device of the present application, it is necessary to first connect the device of the present application to a single-chip microcomputer, and the single-chip microcomputer is connected to a computer. During operation: first move the first cross bar 32 of the U-shaped slider assembly 30 to the uppermost position of the first chute 311 (so that there is enough space to place the fuel cell stack 100), then place the fuel cell stack 100 on the first support block 21 and the second support block 22, and then move the ball screw 52 in the horizontal direction and the first cross bar 32 and the second connecting block 35 in the vertical direction, so that the three rows of probes on the first connecting block 34 are in contact with one side surface of the first plate, the second plate, and the third plate of the fuel cell stack in sequence, and the three rows of probes on the second connecting block 35 are in contact with the other side surface of the first plate, the second plate, and the third plate of the fuel cell stack in sequence, and then measure the resistance of the first plate, the second plate, and the third plate; measure the resistance of each plate of the fuel cell stack in sequence according to the above method. The measured resistance is transmitted to the computer through the single-chip microcomputer, and the data can be read and processed by the computer.

[0047] The device of the present application can well control the movement of the microprobe through the ball screw assembly and the U-shaped slider assembly, and can measure the resistance distribution of each part of the fuel cell stack during the reaction of the fuel cell stack. The resistance distribution of each part of the fuel cell stack measured according to the device of the present application can be used for fitting and calculating the temperature distribution of each part of the fuel cell stack, providing data support and guidance for the design and research of the fuel cell stack.

[0048] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. An apparatus for measuring the resistance distribution of sheet-like stacked materials, characterized in that, Applicable to the resistance measurement of sheet stacked materials, including a bottom plate, support blocks, a U-shaped slider assembly, micro-probes, and a ball screw assembly; The support blocks include a first support block and a second support block arranged in parallel on the bottom plate; one end of the U-shaped slider assembly is slidably connected to the first support block, and the other end is slidably connected to the second support block; The ball screw assembly is arranged on the bottom plate, and the ball screw assembly is arranged between the first support block and the second support block, and the ball screw assembly abuts against the U-shaped slider assembly; The micro-probes include a first micro-probe and a second micro-probe. The first micro-probe is arranged on the top of the U-shaped slider assembly, and the second micro-probe is arranged on the bottom of the U-shaped slider assembly; The U-shaped slider assembly includes a U-shaped frame, a first cross bar slidably connected to the top end of the U-shaped frame, and a lower slider arranged at the bottom of the U-shaped frame; the lower slider includes a first lower slider and a second lower slider arranged symmetrically; one end of the bottom of the U-shaped frame is slidably connected to the first support block, and the other end is slidably connected to the second support block, and the bottom of the U-shaped frame is fixedly connected to the ball screw assembly; One end of the sheet stacked material is arranged at the top end of the first support block, and the other end is arranged at the top end of the second support block; a gap adapted to the sheet stacked material is arranged inside the U-shaped frame; The resistance distribution is used for fitting and calculating the temperature distribution of each part of the sheet stacked material; The first micro-probe and the second micro-probe are symmetrically arranged; both the first micro-probe and the second micro-probe include multiple rows of micro-probes arranged in parallel.

2. The device for measuring the resistance distribution of a sheet-like stacked material according to claim 1, characterized in that, First chutes are symmetrically arranged at both ends of the U-shaped frame, and the first cross bar is slidably connected inside the first chutes.

3. The device for measuring the resistance distribution of a sheet-like stacked material according to claim 2, characterized in that, A first connection block is arranged on the side of the first cross bar close to the ball screw assembly, and the first micro-probe is arranged on the side of the first connection block close to the ball screw assembly.

4. The device for measuring the resistance distribution of a sheet-like stacked material according to claim 3, characterized in that, Second chutes are symmetrically arranged on the first lower slider and the second lower slider; the second micro-probe is arranged on the side of the second connection block close to the first connection block; both ends of the second connection block are slidably connected inside the second chutes.

5. The device for measuring the resistance distribution of a sheet-like stacked material according to claim 1, characterized in that, A first hollow is arranged on the first support block, and a first U-shaped frame slide rail is arranged inside the first hollow; a second hollow is arranged on the second support block, and a second U-shaped frame slide rail is arranged inside the second hollow; the first U-shaped frame slide rail and the second U-shaped frame slide rail are symmetrically arranged; one end of the bottom of the U-shaped frame is slidably connected to the first U-shaped frame slide rail, and the other end is slidably connected to the second U-shaped frame slide rail.

6. The device for measuring the resistance distribution of a sheet-like stacked material according to claim 1, characterized in that, The ball screw assembly includes a base, a ball screw, and a connecting plate. The base is arranged on the bottom plate; a groove is arranged on the base, and the ball screw is arranged inside the groove; base slide rails are arranged on both sides of the base, and the connecting plate is slidably connected to the base slide rails; the connecting plate is slidably connected to the ball screw; the side of the connecting plate away from the base is fixedly connected to the U-shaped frame.

7. The device for measuring the resistance distribution of a sheet-like stacked material according to claim 6, characterized in that, The ball screw is a precision ball screw; the sheet-like stacked material is a fuel cell stack.

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