Preparation method of ultrathin titanium strip for bipolar plate of hydrogen fuel cell

A fuel cell and bipolar plate technology, which is used in manufacturing tools, metal rolling, metal rolling, etc., can solve the problems that the mechanical properties and batch stability of products are difficult to meet the engineering application of hydrogen fuel cell titanium bipolar plates. , to achieve the effect of reducing the conduction resistance of the bipolar plate to current and heat, high anti-corrosion performance, and improving uniformity

Pending Publication Date: 2022-06-07
新疆湘润新材料科技有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the mass production of titanium strips with a thickness of not less than δ0.3mm can only be realized in China. The high-precision ultra-thin titanium strips with a thickness of δ0.1-0.15mm are still in the trial production of medium and small batches, and the mechanical properties and batch stability of the products are difficult. Meet the needs of hydrogen fuel cell titanium bipolar plate engineering application

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of ultrathin titanium strip for bipolar plate of hydrogen fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] S1, ingot smelting:

[0039]S1-1. Select grade 0 small particle sponge titanium as the raw material, wherein the mass percentage of each impurity element in the sponge titanium is: Fe: 0.015wt%, O: 0.035wt%; the Brinell hardness HBW of the sponge titanium is 90N / mm 2 ;

[0040] S1-2, the sponge titanium obtained in step S1-1 is smelted twice in a vacuum consumable electric arc furnace to obtain a pure titanium ingot; wherein, the mass percentage composition of each element in the pure titanium ingot is: Fe: 0.03wt% , C: 0.02wt%, N: 0.02wt%, H: 0.006wt%, O: 0.045wt%, the balance is Ti;

[0041] S2, slab forging:

[0042] The pure titanium ingot obtained in step S1-2 is heated to 900 ° C, forging is carried out after holding for 3 hours, and then the forging defects and oxide scale on the surface of the pure titanium ingot after forging are removed by machining, and finally the surface finishing treatment is performed to control the rough surface of the slab. The degre...

Embodiment 2

[0057] A preparation method of an ultra-thin titanium strip for a hydrogen fuel cell bipolar plate, comprising the following steps:

[0058] S1, ingot smelting:

[0059] S1-1. Select grade 0 small particle sponge titanium as the raw material, wherein the mass percentage of each impurity element in the sponge titanium is: Fe: 0.014wt%, O: 0.034wt%; the Brinell hardness HBW of the sponge titanium is 88N / mm 2 ;

[0060] S1-2, press the sponge titanium obtained in step S1-1 into a single electrode, then weld the single electrode with tungsten argon arc welding, and finally use the vacuum consumable electric arc furnace to carry out the welding of the single electrode after the welding is completed. Secondary smelting to obtain a pure titanium ingot; wherein, the mass percentage composition of each element in the pure titanium ingot is: Fe: 0.026wt%, C: 0.018wt%, N: 0.015wt%, H: 0.0059wt%, O: 0.042wt%, the balance is Ti; among them, the vacuum consumable electric arc furnace curr...

Embodiment 3

[0077] A preparation method of an ultra-thin titanium strip for a hydrogen fuel cell bipolar plate, comprising the following steps:

[0078] S1, ingot smelting:

[0079] S1-1. Select grade 0 small particle sponge titanium as the raw material, wherein the mass percentage of each impurity element in the sponge titanium is: Fe: 0.013wt%, O: 0.031wt%; the Brinell hardness HBW of the sponge titanium is 90N / mm 2 ;

[0080] S1-2. The sponge titanium obtained in step S1-1 is smelted twice in a vacuum consumable electric arc furnace to obtain a pure titanium ingot; wherein, the mass percentage composition of each element in the pure titanium ingot is: Fe: 0.02wt% , C: 0.016wt%, N: 0.018wt%, H: 0.004wt%, O: 0.042wt%, and the balance is Ti;

[0081] S2, slab forging:

[0082] The pure titanium ingot obtained in step S1-2 is heated to 1000° C., and then forged after being kept for 5 hours. Then, the surface forging defects and oxide scale of the pure titanium ingot after forging are re...

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

PropertyMeasurementUnit
Widthaaaaaaaaaa
Widthaaaaaaaaaa
Brinell hardnessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method of an ultrathin titanium strip for a bipolar plate of a hydrogen fuel cell, which comprises the following steps: S1, smelting 0-grade small-particle sponge titanium to obtain a pure titanium cast ingot; s2, the pure titanium cast ingot is subjected to forging and machining treatment, and a pure titanium plate blank is obtained; s3, the pure titanium plate blank is hot-rolled into a titanium strip coil, then the titanium strip coil is subjected to annealing, shot blasting and acid pickling treatment, and a hot-rolled and annealed titanium strip coil is obtained; s4, the hot-rolled and annealed titanium strip coil is cold-rolled into a first-rolling-process titanium strip coil, then the first-rolling-process titanium strip coil is subjected to annealing, shaping and double-face dull polish treatment, and a cold-rolled titanium strip intermediate is obtained; s5, the cold-rolled titanium strip intermediate is cold-rolled into a two-rolling-process titanium strip coil; s6, the secondary rolling process titanium strip coil is subjected to stretch bending and straightening treatment; and S7, the secondary rolling process titanium strip coil is subjected to annealing treatment, and a finished product titanium strip is obtained. The process is reasonable in design, and the obtained finished titanium strip is uniform in internal structure, excellent in appearance quality and suitable for large-scale popularization.

Description

technical field [0001] The invention relates to the technical field of hydrogen fuel cells, in particular to a preparation method of an ultra-thin titanium strip for bipolar plates of hydrogen fuel cells. Background technique [0002] As a secondary energy, hydrogen has the characteristics of renewable, zero-carbon, high calorific value, etc. It has become a world-recognized clean energy and has been widely researched and developed. The development of hydrogen fuel cells can replace traditional internal combustion engines and lithium-ion power batteries as a new generation of clean power sources. Bipolar plates are the key components of proton exchange membrane fuel cells, and their mass accounts for about 70% of the entire stack, and their cost accounts for about 40%. The newly developed bipolar plate materials are mainly divided into three categories, namely graphite bipolar plate, composite bipolar plate and metal bipolar plate. In contrast, the titanium bipolar plate i...

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
no application Login to view more
IPC IPC(8): B21C37/02B21J5/00B21B1/22B21B45/02C22F1/18B22D7/00
CPCB21C37/02B21J5/002B21B1/22B21B45/0242B21B45/0251B22D7/005C22F1/183B21B2001/221B21B2001/225Y02E60/50
Inventor 邵博牛文宇王欣李建康张路路高文柱
Owner 新疆湘润新材料科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap