Impermeable Graphite Bipolar Plate

CHIVET is a fuel cell components manufacturer that specializes in high performance custom fuel cell components for product manufacturers, researchers and educators around the world. 

We offer the widest selection in Impermeable Graphite Bipolar Plates for Fuel Cell(PEMFC), hydrogen fuel cell stack, Membrane Electrode Assemblies (MEA), Catalyst Coated Membranes (CCM), Gas Diffusion Electrodes (GDE),Gas Diffusion Layers(GDL), Bipolar plate, Catalysts,Membranesand so on, as well as the newest products and technologies from renowned international vendors.

We have developed cost- effective Impermeable Graphite Bipolar Plates for Fuel Cell(PEMFC) which is advanced bipolar plates with high electrical conductivity and good mechanical strength. The bipolar plates allow fuel cells to operate at high temperatures and have excellent electrical and thermal conductivity.

our ultimate destinationis the best provider of hydrogen energy and fuel cell products and technical solutions in the world.

History of CHIVET

Founded inChina,Zhejiang in2007,was originally part of one of the oldest and most recognized fuel cell bipolar plate in theChina, operating as Hexcarbontech’s CommercialFuel Cell Components Division..As a part ofHexcarbontech, the division manufactured and soldbipolar plate commercially for more than 10 years. We offer the most diverse and expansive fuel cell components on the web, including products catering to educational, research and testing, and industrial applications.In 2017, the current operating management of the division negotiated an exclusive license withHexcarbontech to transition the division into an independent company –CHIVET company relocated toZhejiang pro., to allow for faster and cheaper distribution throughout theChina and world.

CHIVET Services: Customization, Quality, Customer Service

Customization–CHIVET is unique among other competing fuel cell companies in that our products are 100% custom for our customers.Any part of ourhydrogen fuel cell can be customized according to customers' needs, such as size, weight, power, voltage, etc.. .

Quality– Our process complies with ISO9001 standards but, more importantly, our customers around the world have found our fuel cell bipolar plate to be consistently of the highest quality in their real life applications. Some of our customers use ourfuel cell bipolar plate as their gold standard when developing or testing their own products because they know they can rely on our consistent high quality.

Customer Service–We believe that customer service isthe most expansive selection ofour business,This meansproviding excellent customer service, offering the fastest delivery time possible, and ensureing that every customer is satisfied with their purchase. We are continually looking to improve our services so feedback from our customers and vendors are always welcome.

Features:

- Impermeable to gases ( hydrogen and oxygen)

- Ideal electrical conductivity

- A balance between conductivity, strength, size and weight

- Resistance to corrosion

- Easy to produce in bulk Features:

- Cost-effective

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Impermeable Graphite Bipolar Plate for Fuel Cell

产品内容

Impermeable Graphite Bipolar Plate

1.Product Introduction

The function ofbipolar plate (also known as diaphragm) is to provide gas flow channel, prevent the collusion betweenhydrogen and oxygen in the battery gas chamber, and establish a current path between the Cathode and anode in series. On the premise of maintaining a certain mechanical strength and good gas resistance, the thickness of bipolar plate should be as thin as possible to reduce the conduction resistance to current and heat.

We use the graphite material with impregnated resin in order to achieve gas impermeability and high strength. And the material retains the favorable properties of graphite in terms of high electrical conductivity and high thermal conductivity.

We can machine the bipolar plates on both sides with flow fields, or machine single side or provide unmachined blank plates as well. All graphite plates could be machined as per your detailed design.

2.ProductParameter (Specification)

Impermeable Graphite Bipolar Plate

3.Product Feature And Application

A fuel cell uses the chemical energy of hydrogen or other fuels to cleanly and efficiently produce electricity. If hydrogen is the fuel, the only products are electricity, water, and heat.Fuel cells are unique in terms of the variety of their potential applications; they can use a wide range of fuels and feedstocks and can provide power for systems as large as a utility power station and as small as a laptop computer.Bipolar plate is the core accessory of fuel cell.

Bipolar plates are responsible for functions of vital importance to the long-term performance of fuel cells. They play crucial roles in water and gas management, mechanical strength and electrical conductivity. It also significantly contributes to the volume, weight and cost of fuel cell stacks. The properties of bipolar plates are affected by the materials and processes used in the manufacturing of the plates. 

4, Product Details

Thebipolar plate adopts dense graphite and is machined into gas channel The Impermeable Graphite Bipolar Plate has stable chemical properties and low contact resistance with MEA.

Bipolar plates are key components of proton exchange membrane fuel cells –they notably distribute fuel gas and air and conduct electricity. Various materials and surface treatments have been developed to improve their properties.

The bipolar plates need proper surface treatment. After nickel plating on the anode side of the bipolar plate, the conductivity is good, and it is not easy to be wetted by the electrolyte, which can avoid the loss of electrolyte. The flexible contact between the electrolyte diaphragm and the bipolar plate outside the effective area of the electrode can effectively prevent the gas from leaking out, which is the so-called "wet seal". In order to reduce the corrosion of molten carbonate on stainless steel at the "wet seal" position, the bipolar plate frame needs to be "aluminized" for protection.

Anti-explosion performance test of adhesive plate (method from American fuel bipolar plate company)

The special tooling locks the four sides of the adhesive plate with a torque wrench of 13N.M, and pressurizes the cooling chamber. The adhesive plate will not be opened and leaked when the air pressure intensity is≥4.5KG(0.45MPA)

 
Air tightness test of adhesive plate

Under the condition of pressurizing the cooling chamber with 1KG(0.1MPA) , there is no leakage in the hydrogen chamber, oxygen chamber and outer chamber.

Contact resistance measurement

Single-point contact resistance:＜9mΩ.cm2         

Average contact resistance:＜6mΩ.cm2

Workplace , equipment and Packaging details

CHIVET have advanced graphite processing equipment and exquisite production technology, with graphite CNC processing center, CNC milling machine, CNC lathe, large sawing machine, surface grinder and so on. We can process all kinds of difficult Impermeable Graphite Bipolar Plate according to customer needs.