阅读说明：本技术 用于燃料电池的电压采样端子及其制备工具和制备方法 (Voltage sampling terminal for fuel cell and preparation tool and preparation method thereof ) 是由 祁星鑫 徐文锦 彭涛 袁飞 孙利杰 杨晶 于 2021-09-29 设计创作，主要内容包括：本发明涉及一种用于燃料电池的电压采样端子及其制备工具和制备方法,采样端子包括一体成型的采集部以及压接部,所述采集部包括呈V字形的弯折段和直丝段,所述压接部包括锯齿段以及固定段,所述直丝段与锯齿段连接,测量时,所述采集部插设在所述采样孔内,并与采样孔的内壁抵接,所述锯齿段与采样线束固定并通过采样线束将电压信号传递给采样设备,所述直丝段与固定段位于同一直线上。本发明的采样端子通过特殊的制备工具及制备方法制备得到,成本低廉,结构简单,制作简单、安装简单、适配性强,适合量产。(The invention relates to a voltage sampling terminal for a fuel cell, a preparation tool and a preparation method thereof, wherein the sampling terminal comprises an integrally formed acquisition part and a crimping part, the acquisition part comprises a V-shaped bending section and a straight wire section, the crimping part comprises a sawtooth section and a fixing section, the straight wire section is connected with the sawtooth section, the acquisition part is inserted in a sampling hole and is abutted against the inner wall of the sampling hole during measurement, the sawtooth section is fixed with a sampling wire harness and transmits a voltage signal to sampling equipment through the sampling wire harness, and the straight wire section and the fixing section are positioned on the same straight line. The sampling terminal is prepared by a special preparation tool and a preparation method, is low in cost, simple in structure, simple to manufacture, simple to install, strong in adaptability and suitable for mass production.)

1. The utility model provides a voltage sampling terminal for fuel cell, sampling terminal installs in fuel cell's galvanic pile voltage sampling hole for sample galvanic pile voltage and give sampling device with voltage signal transmission, a serial communication port, sampling terminal includes integrated into one piece's collection portion and crimping portion, collection portion is including the bending section and the straight wire section that are the V font, crimping portion includes sawtooth section and fixed segment, the straight wire section is connected with the sawtooth section, during the measurement, collection portion inserts and establishes in the sampling hole to with the inner wall butt of sampling hole, the sawtooth section is fixed with the sampling pencil and gives sampling device with voltage signal transmission through the sampling pencil, the straight wire section is located same straight line with fixed segment.

2. The voltage sampling terminal for a fuel cell according to claim 1, wherein a material of the sampling terminal includes one of phosphor bronze, beryllium bronze, stainless steel, or silver copper.

3. A preparation tool for preparing the sampling terminal according to claim 1 or 2, wherein the preparation tool comprises an upper pressing unit and a lower pressing unit, one end of the upper pressing unit is provided with an upper pressing tooth, one end of the lower pressing unit is provided with a lower pressing tooth matched with the upper pressing tooth, the upper pressing tooth and the lower pressing tooth are matched in shape with the sampling terminal, the middle parts of the upper pressing unit and the lower pressing unit are connected through a rotating shaft, and the upper pressing unit and the lower pressing unit can rotate around the rotating shaft.

4. The tool of claim 3, wherein the upper pressing unit includes an upper tooth fixing shank and a pressing upper tooth fixed to one end of the upper tooth fixing shank, and the lower pressing unit includes a lower tooth fixing shank and a pressing lower tooth fixed to one end of the lower tooth fixing shank, and the upper tooth fixing shank and the lower tooth fixing shank are connected by a rotating shaft.

5. The production tool according to claim 3, wherein the pressed upper teeth and the pressed lower teeth are provided with a bent portion, a straight wire forming portion, a saw tooth forming portion, and a fixing portion in this order from the end portion toward the tail portion,

the bending part positioned on the pressing upper tooth is L-shaped, the bending part positioned on the pressing lower tooth is wedge-shaped, and the L-shaped bending part is positioned outside the wedge-shaped bending part;

the straight wire forming parts of the pressing upper teeth and the pressing lower teeth are planes;

the sawtooth forming parts of the upper pressing teeth and the lower pressing teeth are mutually matched bulges and grooves;

the fixed parts of the upper pressing teeth and the lower pressing teeth are planes and are the same plane with the straight wire forming part.

6. The tool of claim 5, wherein the trailing ends of the upper and lower pressing teeth are provided with angle forming portions, the angle forming portions including a flat surface and grooves provided on the upper and lower pressing teeth, respectively, the flat surface and grooves forming the angle forming holes when the upper and lower pressing teeth are engaged.

7. The tool of claim 5, wherein the plurality of angularly shaped holes have progressively increasing widths.

8. A method for preparing a sampling terminal by using the preparation tool according to any one of claims 3 to 7, wherein the preparation method comprises the following steps:

(1) placing a metal elastic wire between the pressing upper tooth and the pressing lower tooth, wherein the top end of the metal elastic wire is flush with the tail parts of the fixing parts on the pressing upper tooth and the pressing lower tooth;

(2) rotating the upper pressing unit and the lower pressing unit to enable the upper teeth and the lower pressing teeth to be meshed to obtain a sampling terminal crude product containing a fixed section, a sawtooth section, a straight wire section and a bending point;

(3) placing bending points of the crude product of the sampling terminal in the angle forming parts of the pressing upper teeth and the pressing lower teeth, wherein two edges of the bending points are respectively abutted against the walls of the angle forming parts;

(4) rotating the upper pressing unit and the lower pressing unit to enable the upper teeth and the lower pressing teeth to be meshed and form an angle forming hole, and pressing two edges at the bending point to form a bending section;

(5) and (4) cutting off and separating the formed sampling terminal and the metal elastic wire to obtain an independent sampling terminal.

9. The method of claim 8, wherein the metal elastic wire is a metal elastic wire wound and stored.

Technical Field

The invention relates to the technical field of fuel cells, in particular to a voltage sampling terminal for a fuel cell, and a preparation tool and a preparation method thereof.

Background

The fuel cell is a fourth power generation technology following hydroelectric power generation, thermal power generation and atomic power generation, is a chemical device for directly converting chemical energy of fuel into electric energy, and is the most promising power generation technology. The single-stack voltage of the fuel cell is the most important evaluation index for the operation of the fuel cell, and the voltage of the fuel cell needs to be continuously sampled in real time.

The voltage sampling points of the fuel cell stack are positioned between bipolar plates about 2mm and are of a hole-shaped structure about 1mm, the stack is arranged closely, and the sampling points are dense. The current sampling method is to plug a silver wave-shaped elastic sheet into a sampling hole for sampling, and a sampling wire harness is welded outside the sampling hole. The disadvantage of this method is that it is easy to crack the bipolar plate or the plugging is not firm; in order to ensure contact, conductive adhesive needs to be injected into the fine holes, the conductive adhesive is easy to overflow from the fine holes, and the conductive adhesive in the adjacent sampling holes is easy to connect after the conductive adhesive is full, so that short circuit is caused; after the conductive adhesive is dried, the connection between the wave-shaped elastic sheet and the sampling hole becomes loose and infirm; the welding part of the wave-shaped elastic sheet and the lead is easy to break, and the like.

In addition, the sampling terminal has no special preparation tool, so that the preparation of the sampling terminal is very troublesome. Therefore, there is a great need in the art for a simple, reliable sampling terminal, and for a tool for preparing this type of sampling terminal.

Disclosure of Invention

It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and to provide a voltage sampling terminal for a fuel cell.

The present application also provides a tool and a method for preparing the sampling terminal.

In order to achieve the object of the present invention, the present application provides the following technical solutions.

In a first aspect, the application provides a voltage sampling terminal for fuel cell, sampling terminal installs in fuel cell's pile voltage sampling hole for sample pile voltage and give sampling device with voltage signal transmission, sampling terminal includes integrated into one piece's collection portion and crimping portion, collection portion is including the bending segment and the straight wire section that are the V font, crimping portion includes sawtooth section and fixed segment, the straight wire section is connected with the sawtooth section, during the measurement, collection portion inserts and establishes in the sampling hole to with the inner wall butt of sampling hole, the sawtooth section is fixed with the sampling pencil and gives sampling device with voltage signal transmission through the sampling pencil, the straight wire section is located same straight line with the fixed segment. The V font bending segment top of collection portion and the aperture that will be greater than the sampling hole between the straight silk section, therefore during the sampling, insert the sampling hole back with collection portion, the bending segment that is the V font and the straight silk section by compress slightly and with the inner wall butt of sampling hole, because the sampling terminal has certain elasticity, consequently the bending segment that is compressed slightly and straight silk section are under the resilience effort of material itself, form certain extrusion with the inner wall of sampling hole, thereby guarantee that collection portion can stably place in the sampling hole. The sawtooth section is arranged on the crimping part, and is mainly used for meshing with the sampling wire harness through the sawtooth when the sampling wire harness is crimped, so that the sampling wire harness and the sampling wire harness are prevented from being separated.

In one embodiment of the first aspect, the material of the sampling terminal includes one of phosphor bronze, beryllium bronze, stainless steel, or silver copper. The materials have good conductivity and certain elasticity, and can rebound within a deformation range of a certain range. The sampling terminal can adopt a round elastic wire or a flat wire.

In the second aspect, this application still provides a preparation instrument for preparing as above sampling terminal, the preparation instrument is including last suppression unit and suppressing the unit, the one end of going up the suppression unit is equipped with the suppression and goes up the tooth, the one end of suppressing the unit be equipped with tooth assorted suppression is down toothed in the suppression, the suppression go up the tooth with suppress under the tooth the shape with sampling terminal phase-match, go up the middle part of suppression unit and suppressing the unit and connect through the pivot, and both can be rotatory round the pivot.

In an embodiment of the second aspect, the upper pressing unit includes an upper tooth fixing handle and a pressing upper tooth fixed at one end of the upper tooth fixing handle, the lower pressing unit includes a lower tooth fixing handle and a pressing lower tooth fixed at one end of the lower tooth fixing handle, and the upper tooth fixing handle and the lower tooth fixing handle are connected through a rotating shaft.

In one embodiment of the second aspect, the pressed upper teeth and the pressed lower teeth are provided with a bent portion, a straight wire forming portion, a sawtooth forming portion, and a fixing portion in this order from the end portion to the tail portion,

the bending part positioned on the pressing upper tooth is L-shaped, the bending part positioned on the pressing lower tooth is wedge-shaped, and the L-shaped bending part is positioned outside the wedge-shaped bending part;

the straight wire forming parts of the pressing upper teeth and the pressing lower teeth are planes;

the sawtooth forming parts of the upper pressing teeth and the lower pressing teeth are mutually matched bulges and grooves;

the fixed parts of the upper pressing teeth and the lower pressing teeth are planes and are the same plane with the straight wire forming part.

In one embodiment of the second aspect, the tail ends of the upper pressing tooth and the lower pressing tooth are provided with angle forming portions, and the angle forming portions include a flat surface and grooves, which are respectively provided on the upper pressing tooth and the lower pressing tooth, and form the angle forming holes when the upper pressing tooth and the lower pressing tooth are engaged with each other. Because the bending parts of the upper pressing teeth and the lower pressing teeth are in a semi-open design, the bending section cannot be formed at one time. This application is through the mode in angle shaping hole, carries out extrusion to the fifty percent discount portion, and it is more convenient to operate, and guarantees that the shaping angle is unanimous.

In one embodiment of the second aspect, the width of a plurality of the angle shaping holes is gradually increased. Because to different fuel cell, the aperture size of its sampling hole also has the difference, consequently, the opening bore of the portion of bending also need have big or small, through setting up the angle shaping hole of different width, when the preparation, the extrusion force of angle shaping pore pair metal elastic wire is different to make the opening width of the portion of bending also have big or small, match different sampling holes.

In a third aspect, the present application also provides a preparation method for preparing a sampling terminal by using the preparation tool as described above, the preparation method comprising the steps of:

(1) placing a metal elastic wire between the pressing upper tooth and the pressing lower tooth, wherein the top end of the metal elastic wire is flush with the tail parts of the fixing parts on the pressing upper tooth and the pressing lower tooth;

(2) rotating the upper pressing unit and the lower pressing unit to enable the upper teeth and the lower pressing teeth to be meshed to obtain a sampling terminal crude product containing a fixed section, a sawtooth section, a straight wire section and a bending point;

(3) placing bending points of the crude product of the sampling terminal in the angle forming parts of the pressing upper teeth and the pressing lower teeth, wherein two edges of the bending points are respectively abutted against the walls of the angle forming parts;

(4) rotating the upper pressing unit and the lower pressing unit to enable the upper teeth and the lower pressing teeth to be meshed and form an angle forming hole, and pressing two edges at the bending point to form a bending section;

(5) and (4) cutting off and separating the formed sampling terminal and the metal elastic wire to obtain an independent sampling terminal.

In one embodiment of the third aspect, the metal elastic wire is a metal elastic wire wound and stored. Namely, the metal elastic wire can adopt a disc-shaped metal elastic wire, so that the storage is convenient. Of course, it is also possible to use a straight wire.

Compared with the prior art, the invention has the beneficial effects that:

the application has the advantages of simple structure, simple manufacture, simple installation, firm installation, simple taking out and low cost, and is suitable for mass production and popularization.

Drawings

FIG. 1 is a schematic view of a sampling terminal of the present application after insertion into a sampling hole;

FIG. 2 is a schematic structural view of a production tool of the present application;

fig. 3 is a schematic view of the structure after the pressed upper teeth and the pressed lower teeth are meshed.

In the drawing, 1 is a sampling hole, 2 is a sampling terminal, 3 is a pressing upper tooth, 4 is a pressing lower tooth, 5 is an upper tooth fixing handle, 6 is a lower tooth fixing handle, 7 is a bolt, 8 is a bolt, 9 is a fixing section, 10 is a saw tooth section, 11 is a straight wire section, 12 is a bending point, 13 is a bending section, 16 is a fixing part, 17 is a saw tooth forming part, 18 is a straight wire forming part, 19 is a bending part, 20 is an angle forming hole, and 21 is a rotating shaft.

Detailed Description

Unless otherwise defined, technical or scientific terms used herein in the specification and claims should have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. All numerical values recited herein as between the lowest value and the highest value are intended to mean all values between the lowest value and the highest value in increments of one unit when there is more than two units difference between the lowest value and the highest value.

While specific embodiments of the invention will be described below, it should be noted that in the course of the detailed description of these embodiments, in order to provide a concise and concise description, all features of an actual implementation may not be described in detail. Modifications and substitutions to the embodiments of the present invention may be made by those skilled in the art without departing from the spirit and scope of the present invention, and the resulting embodiments are within the scope of the present invention.

Examples

The following will describe in detail the embodiments of the present invention, which are implemented on the premise of the technical solution of the present invention, and the detailed embodiments and the specific operation procedures are given, but the scope of the present invention is not limited to the following embodiments.

Example 1

A voltage sampling terminal 2 for a fuel cell is provided with a V-shaped structure at one end, two sides of the V-shaped structure are respectively a bending section 13 and a straight section 11, and the two sections are connected at a bending point 12. The V-shaped acquisition part is inserted in the pile voltage sampling hole 1. The other end of the sampling terminal 2 is provided with a sawtooth section 10 and a fixed section 9, the sawtooth section 10 is in a wave shape in the present embodiment, the sawtooth section 10 and the fixed section 9 are exposed outside the sampling hole 1, and the sawtooth section 10 and the sampling wire harness are fixed (the sampling wire harness is not shown in the figure), as shown in fig. 1.

The structure of the sampling terminal manufacturing tool is shown in fig. 2, and comprises four parts, namely an upper pressing tooth 3, a lower pressing tooth 4, an upper tooth fixing handle 5 and a lower tooth fixing handle 6; the upper tooth fixing handle 5 and the lower tooth fixing handle 6 are connected through a rotating shaft 21 and can rotate around the rotating shaft 21; the pressing upper teeth 3 and the upper teeth fixing handle 5 are fixed through bolts 7; the pressed lower teeth 4 and the lower teeth fixing handle 6 are kept fixed through bolts 8.

On tooth 3 and 4 interlock clearances of tooth under the suppression, contain angle shaping hole 20, fixed part 16, sawtooth shaping portion 17, straight wire shaping portion 18, the 19 five parts of portion of bending in proper order from the tail end to the tip, wherein:

the fixing part 16 is a pressing section for pressing the upper teeth 3 and the lower teeth 4 to bite the top end of the metal elastic wire.

The structure of the sawtooth forming portion 17 is as follows: tooth 3 is the concave surface in the suppression, and tooth 4 is the convex surface under the suppression, and tooth 3 is gone up in the suppression and suppression 4 interlock clearances shaping of tooth are the wave face down, and the wave amplitude height slightly is less than the pipe diameter of sampling terminal and sampling pencil crimping terminal, suppresses half wave at least in crimping terminal pipe length within range.

The straight wire forming section 18 has the following structure: the occlusion gap of the upper pressed tooth 3 and the lower pressed tooth 4 is formed into a plane, and the length of the straight wire part of the sampling terminal 2 is controlled, and the length of the straight wire part is slightly longer than the height of the sampling hole 1. The sampling terminal 2 is used for controlling the distance between the sampling terminal and the wiring harness in a compression joint mode after being exposed out of the sampling hole 1, and the sampling hole 1 is not overlapped with the sampling wiring harness.

The portion of bending 19, tooth 3 was gone up in the suppression the portion of bending be the L form, and the portion of bending of tooth 4 is the wedge under the suppression, and the L form portion of bending is located the outside of wedge portion of bending.

The structure of the angle forming hole 20 is as follows: the pressing upper teeth 3 are provided with guide grooves with the width slightly larger than the wire diameter of the metal elastic wire, the height of each guide groove is the width of a V-shaped opening at the front end of the sampling terminal 2, the guide grooves with the height slightly larger than the height and slightly smaller than the height are arranged in parallel, namely if the guide grooves with the height of 1mm need to be arranged, the guide grooves with the height of 1.2mm and 0.8mm are arranged in parallel, and the pressing lower teeth 4 are planes.

After occlusion, a certain gap is left between the upper pressed tooth 3 and the lower pressed tooth 4, which is a distribution path of the metal elastic wire, as shown in fig. 2 and 3.

The manufacturing method of the sampling terminal comprises the following steps:

1) opening the occlusal surfaces of the pressing upper teeth 3 and the pressing lower teeth 4, placing the top end of the metal elastic wire on the fixing part 16 of the manufacturing tool, and kneading the pressing handle;

2) kneading the metal elastic wire at the bending point of the first compression molding by hand to enable the metal elastic wire to be tightly attached to the conical outer surface of the lower pressing tooth 4 to form a crude product of the sampling terminal;

3) the crude product of the sampling terminal is vertical to the occlusal surface of the pressing upper tooth 3 and the pressing lower tooth 4 of the pressing tool, is placed in the angle forming hole 20, and is kneaded with the pressing handle;

4) shearing the highest point or the distance of about 6mm of the bent section of the metal elastic wire formed by the second pressing, and finishing the manufacturing of the sampling terminal;

the sampling terminal material that this application adopted can be elastic materials such as phosphor bronze, beryllium bronze, stainless steel, silver copper for the superfine metal bullet silk that electric conductivity is good, and the shape can be the silk also can be the flat silk.

And (3) crimping the sampling terminal 2 with a sampling wire harness to prepare a sampling assembly, controlling a crimping starting point to be positioned at an end point of a straight wire section 11 of the sampling terminal, and crimping the sawtooth section 10 with the sampling wire harness by using a wire pressing pipe.

And plugging the sampling assembly into the sampling hole 1 in the cross section diagonal direction of the sampling hole 1 to finish sampling and installation.

The embodiments described above are intended to facilitate the understanding and appreciation of the application by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present application is not limited to the embodiments herein, and those skilled in the art who have the benefit of this disclosure will appreciate that many modifications and variations are possible within the scope of the present application without departing from the scope and spirit of the present application.