A method for forming a high-precision metal bipolar plate required for a fuel cell
A metal bipolar plate and fuel cell technology, which is applied to fuel cell parts, forming tools, metal processing equipment, etc., can solve the problems of increasing manufacturing costs, increasing scrap rate, and difficult installation, so as to reduce forming warpage and Stress deformation, reduce production scrap rate, and ensure the effect of welding efficiency
Active Publication Date: 2021-07-13
上海佑戈金属科技有限公司
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
At present, the metal bipolar plate obtained by stamping has obvious warpage and deformation, which causes a large internal stress after the bipolar plate is welded and cannot be released, resulting in the uneven surface of the manufactured bipolar plate, which leads to the irregular shape of the entire fuel cell reactor. It is not easy to install, and the power generation efficiency is affected
However, the stretching depth of the bipolar plate groove generally does not meet the design requirements, and the height error of adjacent flow channels is too large, which reduces the power generation capacity of the bipolar plate
The bipolar plate scrap rate is high during the production process, which greatly increases the manufacturing cost
When welding the bipolar plates together, frequent missing welds further increase the scrap rate
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0059] This embodiment provides a two-step stamping method for preparing a high-precision metal bipolar plate required for a fuel cell. The specific steps are as follows:
[0060] S1, select the raw material of the bipolar plate;
[0061] The selection of raw material plates is the key to manufacturing high-precision metal-based fuel cell bipolar plates. To manufacture high-performance metal-based fuel cell bipolar plates, the molding performance of raw materials must be considered. , Structural ribs and a series of structures, to form such a metal plate, it is necessary to choose moderate hardness, high elongation, and high tensile strength to prevent the plate from cracking. At the same time, as the fuel cell gas flow channel and reaction vessel, the plate material should also have good corrosion resistance, and it can continuously and stably collect current without being oxidized and corroded. The present invention selects an austenitic stainless steel SUS316L with strong ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| width | aaaaa | aaaaa |
| depth | aaaaa | aaaaa |
Login to View More
Abstract
The invention provides a method for forming a high-precision metal bipolar plate required by a fuel cell, which specifically includes the following steps: the main method for making a high-precision metal bipolar plate in the present invention includes: selecting bipolar plate raw materials; designing and manufacturing Die 1 for stamping and forming of the bipolar plate and mold 2 for stamping and forming of the bipolar plate; pre-stamping; complete stamping; stamping and cutting; welding to obtain the bipolar plate. The invention improves the stamping quality of the bipolar plate through the first step of preforming and the second step of complete forming, and solves the problems of warping, excessive stress, insufficient groove depth, and adjacent flow channels during the forming process of the metal bipolar plate. Excessive height difference, high scrap rate, missing welding and other phenomena can form fuel cell metal bipolar plates with high efficiency, high precision and low cost.
Description
technical field [0001] The invention relates to the field of hydrogen energy fuel cells, in particular to a method for forming high-precision metal bipolar plates required by fuel cells. Background technique [0002] A fuel cell is a power generation device that directly converts the chemical energy in fuel and oxidant into electrical energy through an electrocatalytic reaction on a motor. The fuel cell is mainly composed of a membrane electrode (MEA) and a bipolar plate; the MEA is the core of the fuel cell, and the bipolar plate is an important part of the battery, which plays a role in collecting current, gas distribution, water management, and heat management in the fuel cell. Function; there are many types of bipolar plates, and the bipolar plates usually used are mechanically processed graphite bipolar plates. The technology is relatively mature, but the processing cost is high, and it is mainly used in laboratory experimental research; current research on fuel cell bi...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/0206B21D22/02B21D37/20
CPCB21D22/02B21D37/20H01M8/0206Y02E60/50Y02P70/50
Inventor 马腾
Owner 上海佑戈金属科技有限公司