55results about How to "Improve water management" patented technology

A roof ditch molding structure is provided with a body member having a drainage groove that receives a roof ditch molding which is preferably coupled thereto by a double sided tape formed of thermally cured urethane. The roof ditch molding has a rigid carrier member and a resilient cover member that substantially covers an outer surface of the carrier member. The rigid carrier member has a first transverse free end disposed between first and second vertical portions of the body member, and a second transverse free end disposed between the first transverse free end and the second vertical portion of the body member. The first transverse free end has a step portion extending substantially toward the second vertical portion of the body member. The cover member has first and second lip portions extending from the first and second transverse free ends of the carrier member, respectively, to form seals between the roof ditch molding and the drainage groove.

An electrochemical fuel cell stack assembly having a variable active area. The fuel cell stack uses a blocking member to selectively block the flow of reactants through channels of the flow fields of the anode and/or cathode flow paths. Blocking portions of the flow paths allows the fuel cell stack to maintain reactant flow velocities in a desired predetermined range. This enables the control and variation of the active area of the fuel cell, enhancing water management of the fuel cell stack.

The invention relates to a gas diffusion layer of a proton exchange membrane fuel cell. The gas diffusion layer comprises a hydrophobic medium in a gradient distribution in the direction of a flow channel in a plane, and the uniformity of water distribution in the gas diffusion layer during the reaction of a cell is ensured. The fiber arrangement in a direction perpendicular to the flow channel direction in the plane can improve the thermal conductivity ability between the gas diffusion layer and an electrode plate. The porosities in plane penetrating direction are in a gradient arrangement, and the transfer of cell reaction water from a lower surface to an upper surface of the gas diffusion layer is facilitated. The designs of electrode plate ridge lower and flow channel lower gas diffusion layer structures are different, the ridge lower gas diffusion layer structure is concave, the too small porosity in the gas diffusion layer caused by excessive compression is prevented, and the water accumulation in a ridge lower gas diffusion layer is reduced. Compared with the prior art, the consistency of water and heat in the gas diffusion layer can be effectively ensured, the water drainage and heat dissipation capacity of the fuel cell are enhanced, the mass transfer of reaction gas in the cell is increased, and the reaction efficiency of the cell is improved.

A diffusion medium for use in a PEM fuel cell comprising a thin perforated layer having variable size and frequency of perforation patterns incorporated into a microporous layer on a first side of a porous substrate layer, wherein the diffusion medium is adapted to improve water management and performance of the fuel cell.

An electrically conductive fluid distribution element for use in a fuel cell having a conductive non-metallic porous media having a surface with an electrically conductive metal deposited along one or more metallized regions. The metallized regions are arranged to contact a membrane electrode assembly (MEA) in a fuel cell assembly, and thus improve electrical conductance at contact regions between the MEA and the fluid distribution media. Methods of making such a fluid distribution element and operating fuel cell assemblies are also provided.

The invention provides a preparation method of a fuel cell CCM membrane electrode. The preparation method comprises the following specific steps: spraying/screen-printing catalyst slurry on a transfermembrane to form a catalyst layer, and transferring the catalyst layer on a proton exchange membrane by adopting a hot pressing mode to form a CCM electrode. The preparation method provided by the invention is a common preparation method of fuel cell membrane electrodes. In the process of preparing the CCM by a transfer method, because the bonding force between the catalyst layer and the transfermembrane is larger, the prepared catalyst layer is uneven, the hot pressing temperature and pressure are uneven and the environmental temperature and humidity are uneven and the like, the transfer isincomplete, and then the preparation of the CCM fails. The method provided by the invention adopts a transition layer, so that the bonding force between the catalyst layer and the transfer membrane can be reduced, the transfer efficiency of the catalyst layer can be enhanced, the problem of water management between the catalyst layer and a micro-porous layer can be improved, and the subsequent problems of mass transfer and the like can be solved.

The invention discloses a column direct methanol fuel cell with good performance and low cost. The cell comprises a shell, wherein, a membrane electrode is arranged in the shell. A battery liquid compartment is arranged in the membrane electrode, an air chamber is arranged between the shell and the membrane electrode, insulating sealing rings are arranged on both ends of the membrane electrode, and a cathode output device and an anode output device are respectively arranged on the cathode end and the anode end of the cell group, a water-diversion gas-barrier membrane is arranged on the exterior of the anode output device, a water collector is arranged on the exterior of the water-diversion gas-barrier membrane, and the cathode output device is provided with a check valve which is communicated with the cell liquid compartment and a pollutant output bolt device. The cell has the advantages of reasonable structure and good working performance.

The invention relates to a fuel cell, in particular a structure of the fuel cell having a proton exchange membrane applicable to high temperature operation, which comprises a fuel flow field, a CCM, an oxidizer flow field, and thin metal separating boards arranged on two sides of the oxidizer flow field. Inner sides of the thin metal separating boards are provided with poriferous layers of conductive material which are taken as flow fields and diffusing layers. The structure of the invention can simplify the structure of the fuel cell and greatly reduce the size.

The invention discloses a preparation method of a gas diffusion layer of a fuel cell. The method comprises the following steps of: (1) performing hydrophobic treatment on two sides of a carbon substrate material by using a hydrophobic material, and performing curing to obtain a hydrophobic carbon substrate material; (2) coating slurry on one side of the hydrophobic carbon substrate material, and forming a microporous layer after curing, wherein the slurry comprises conductive carbon powder, a dispersing agent, a hydrophobic binder and an emulsifying agent, the mass ratio of the conductive carbon powder to the dispersing agent to the hydrophobic binder to the emulsifying agent is 1:(10-20):(0.2-4):(0.1-2), and the emulsifying agent comprises one or more of Tween 80, triton x-100 and dipolyglycerol. The gas diffusion layer of the fuel cell is good in hydrophobic property, the contact angle can be 160 degrees or above, the water management condition of the fuel cell can be improved, the discharge voltage, the discharge efficiency and the output performance under high current density of the membrane electrode are improved, and the current operation stability and the long-time operationstability of the fuel cell under high voltage can also be improved.

The invention relates to hydrogel-containing catalyst slurry, a catalyst layer prepared from the same and a fuel cell electrode. The catalyst slurry comprises an organic solvent, as well as a catalyst, an ion conductor and hydrogel which are dissolved in the organic solvent, wherein the hydrogel is selected from lignosulfonate hydrogel or acrylic acid hydrogel. The catalyst layer can be obtained by coating the catalyst slurry. The preparation method of the fuel cell electrode includes the following steps that: (a) weighing a catalyst, an ion conductor and hydrogel, sequentially dissolving thecatalyst, the ion conductor and the hydrogel in an organic solvent, and performing uniform dispersing to obtain catalyst slurry; and (b) uniformly coating the catalyst slurry obtained in the step (a)on a gas diffusion layer or a proton exchange membrane, and then carrying out drying treatment to obtain the fuel cell electrode. Compared with the prior art, the fuel cell electrode can assist in solving a water management problem possibly occurring in high-temperature and low-humidity operation of a traditional fuel cell electrode and guaranteeing the output performance of a fuel cell.

The invention provides a gas diffusion layer for a proton exchange membrane fuel cell and a processing technology of gas diffusion layer, gradient wavy micro-groove structures are distributed on the surface of one side of the gas diffusion layer close to a bipolar plate, and the wavy micro-groove structures are located between an inlet section of the gas diffusion layer and an outlet section of the gas diffusion layer. The gradient wavy micro-groove structures are characterized in that the amplitude and the wavelength of the wavy micro-groove structures are increased in a synchronous gradient manner along the gas flowing direction. The grooves distributed according to the gradient can achieve the effect that different water contents correspond to drainage capacities of different strengths, and the consistency of water distribution in the gas flowing direction is guaranteed.

A catalyst layer (20) for a fuel cell and to a method suitable for producing the catalyst layer (20). The catalyst layer (20) includes a catalyst material (22) containing a catalytic material (24) and optionally porous carrier material (23) on which the catalytic material (24) is supported. The catalyst layer also includes mesoporous particles (21) made from hydrophobic material.

A composite electrolyte membrane (10) for a fuel cell (30) includes an ionomer component (16) extending continuously between opposed first and second contact surfaces (12, 14) defined by the membrane (10). The ionomer component is a hydrated nanoporous ionomer consisting of a cation exchange resin. The membrane (10) also includes a microporous region (18) consisting of the ionomer compound (16) and a structural matrix (20) dispersed through region (18) within the ionomer compound (16) to define open pores having a diameter of between 0.3 and 1.0 microns. The microporous region (18) does not extend between the contact surfaces (12, 14), and facilitates water management between the electrode catalysts (32, 34).

The invention provides a management system and method for water resource regulation and operation, and the management system comprises: a data collection module, which is used for detecting the water affair information and equipment information of the system; a data service module, which is used for counting, analyzing and storing water affair data and equipment data in the system and outputting a management report; a water balance detection module, which is used for monitoring and calculating the water unbalance rate of the system in real time; a salt balance detection module, which is used for monitoring the salt balance condition in real time; and a regulation and control module, which is used for data transmission, analysis, monitoring, early warning, diagnosis and regulation and control of water resources. Through on-line monitoring and regulation of water balance and salt balance, water resources and pollution discharge cost are saved, the situation that water resources are insufficient in the place where a plant is located is relieved, meanwhile, due to the arrangement of the regulation and control module, fault discovery time is greatly shortened, an operator can obtain fault treatment measures in the first time, fault removal time is greatly shortened, and comprehensive water consumption of power generation of the whole plant is reduced.

The invention discloses a fuel cell metal bipolar plate flow field manufacturing method, belongs to the field of fuel cells, and particularly relates to a manufacturing process of a fuel cell metal bipolar plate. According to the method, a required flow channel is etched on the surface of the metal bipolar plate mainly according to the principle of electrochemical anodic dissolution, and a hydrophobic film is plated in a groove after a flow field is etched, so that water management is improved, and the corrosion resistance of the flow field plate is enhanced. And the metal bipolar plate flow field is subjected to electrochemical etching, and a hydrophobic protective film is plated in the flow field groove. And the hydrophobic protective film is any one of a PTFE film, a tridecafluorooctyltriethoxysilane film and a heptadecafluorodecyltriethoxysilane film. The method has the advantages of low cost, short time period, easiness in template modification, convenience in manufacturing and the like. According to the method, continuous manufacturing of different sample bipolar plate flow fields can be achieved, so that continuous fine adjustment of the flow fields is achieved, and the optimal flow field performance is obtained.