阅读说明：本技术 具备流体引导流路的燃料电池及其制造方法 (Fuel cell having fluid guide channel and method for manufacturing same ) 是由 程建华 于 2019-02-03 设计创作，主要内容包括：一种燃料电池单元,包括相对的第一隔板、第二隔板和层叠在所述第一和第二隔板之间的膜电极接合体,所述膜电极接合体包括催化剂涂覆膜和分别设于所述催化剂涂覆膜的二侧的第一气体扩散层和第二气体扩散层,所述燃料电池单元还包括位于相对的所述隔板和所述气体扩散层之间的气体引导流路和位于第一隔板和/或所述第二隔板与另一燃料电池单元之间的冷却介质流路,其中所述气体引导流路附着在气体扩散层和/或相对隔板的表面,所述冷却介质流路附着在第一隔板和/或所述第二隔板的外侧表面。(A fuel cell unit comprising a first separator, a second separator, and a membrane-electrode assembly laminated between the first and second separators, the membrane-electrode assembly comprising a catalyst coated membrane and a first gas diffusion layer and a second gas diffusion layer provided on both sides of the catalyst coated membrane, respectively, the fuel cell unit further comprising a gas introduction flow path between the separator and the gas diffusion layer that are opposed, and a cooling medium flow path between the first separator and/or the second separator and another fuel cell unit, wherein the gas introduction flow path is attached to a surface of the gas diffusion layer and/or the opposed separator, and the cooling medium flow path is attached to an outer side surface of the first separator and/or the second separator.)

A fuel cell comprising a plurality of fuel cell units, each of which comprises a first separator, a second separator, and a membrane-electrode assembly laminated between the first and second separators, the membrane-electrode assembly comprising a catalyst-coated membrane and first and second gas diffusion layers provided on first and second sides of the catalyst-coated membrane, respectively, the fuel cell units further comprising a gas introduction flow path between the first separator and the first gas diffusion layer and/or between the second separator and the second gas diffusion layer, wherein the gas introduction flow path is attached to a surface of the corresponding separator facing the corresponding gas diffusion layer and/or a surface of the corresponding gas diffusion layer facing the corresponding separator, the fuel cell further comprising a cooling medium flow path between the first separator and the separator of an adjacent fuel cell unit, and the cooling medium flow path is attached to a surface of the first separator facing the corresponding second separator and/or a surface of the second separator facing the corresponding first separator, and the gas introducing flow path and the cooling medium flow path form a fluid introducing flow path of the fuel cell.

The fuel cell according to claim 1, wherein the cooling medium flow path is attached to an outer side surface of the first separator and/or the second separator, and the gas introducing flow path is attached to an inner side surface of the first separator and/or the second separator.

The fuel cell according to claim 1, wherein the cooling medium flow path is adhered to an outer side surface of the first separator and/or the second separator, and the gas introducing flow path is not adhered to an inner side surface of the first separator and/or the second separator.

The fuel cell according to claim 1, wherein the cooling medium flow path is attached to an outer side surface of the first separator and/or the second separator, and the gas introducing flow path is attached to a surface of the first separator and/or the second separator, the surface facing the corresponding gas diffusion layer.

The fuel cell according to claim 1, wherein the fluid guide flow path is formed on the surface of the corresponding separator and/or the surface of the gas diffusion layer by coating, printing, dispensing, spraying, or transferring.

The fuel cell according to claim 1, wherein a surface of the separator and/or the gas diffusion layer for attaching the fluid guiding flow path is smooth.

The fuel cell according to claim 1, wherein the fluid guide flow path is formed separately from the separator and the gas diffusion layer.

The fuel cell according to claim 1, wherein a material of the fluid guiding flow path is different from the separator and/or the gas diffusion layer.

The fuel cell according to claim 1, wherein a material of the fluid guide flow path is a highly conductive material.

The fuel cell according to claim 1, wherein the gas introducing flow path includes a rib portion and a channel portion for controlling a flow of the reaction fluid and a permeability of the fluid.

The fuel cell according to claim 10, wherein the ribs of the gas guide flow path have a dense structure that prevents the reaction fluid from permeating between adjacent channels and permeating to the corresponding gas diffusion layer via the ribs, or have a porous structure that allows the reaction fluid to permeate between adjacent channels or to the corresponding gas diffusion layer via the ribs.

The fuel cell according to claim 10, wherein the gas guiding flow path further comprises a bottom portion carrying the rib, the bottom portion having a dense structure that prevents the reaction fluid from permeating through the base portion to the corresponding gas diffusion layer or having a porous structure that allows the reaction fluid to permeate through the base portion to the corresponding gas diffusion layer.

The fuel cell according to claim 10, wherein the ribs of the gas guiding flow path are formed on a surface of one of the opposing separator and gas diffusion layer, and an upper surface of a part of the ribs is in contact with a surface of the other of the opposing separator and gas diffusion layer, and an upper surface of another part of the ribs has a spacing from the surface of the other of the opposing separator and gas diffusion layer.

The fuel cell according to claim 1, wherein a rib of the gas guiding flow path is formed on a surface of one of the opposing separator and gas diffusion layer, and an upper surface of the rib is in contact with a surface of the other of the opposing separator and gas diffusion layer, the cooling medium flow path is formed on a surface of one of the opposing first separator and second separator, and an upper surface of the rib is in contact with a surface of the other of the opposing separator.

The fuel cell according to claim 1, wherein the ribs of the gas guiding flow path are formed on the surfaces of the opposing separator and gas diffusion layer, and the top surfaces of the corresponding ribs on the opposing separator and gas diffusion layer are butted, the cooling medium flow path is formed on the surfaces of the opposing first separator and second separator, and the top surfaces of the corresponding ribs on the opposing first separator and second separator are butted.

The fuel cell according to claim 1, wherein the ribs of the gas guiding flow path are formed on the surfaces of the opposing separator and gas diffusion layer, and the ribs on the separator are in contact with the surface of the gas diffusion layer, and the ribs on the gas diffusion layer are in contact with the surface of the separator, and the cooling medium flow path is formed on the surfaces of the opposing first separator and second separator, and the ribs on the first separator are in contact with the surface of the second separator, and the ribs on the second separator are in contact with the surface of the first separator.

The fuel cell of claim 15, wherein on a pair of abutting ribs, the size at the abutting interface is smaller than the size at the interface of the rib with the separator or gas diffusion layer.

The fuel cell of claim 15, wherein the size at the abutting interface is greater than the size at the interface of the rib with the separator or gas diffusion layer, on a pair of abutting ribs.

The fuel cell of claim 10, wherein the material of the ribs enters the interface of the gas diffusion layer.

The fuel cell according to claim 12, wherein the rib and the base of the gas introducing flow path are formed in a full-face adhering manner.

The fuel cell according to claim 10, wherein a part or all of top surfaces of ribs and bottom surfaces of the channel portions of the fluid guide flow path are hydrophilically treated.

A method of manufacturing a fuel cell unit, comprising the steps of:

providing a membrane electrode assembly comprising a catalyst coated membrane and first and second gas diffusion layers provided on first and second sides of the catalyst coated membrane, respectively;

providing a first separator and a second separator;

attaching (adhere) a cooling medium flow channel rib to a surface of an outer side of the first separator and/or the second separator to be in contact with a surface of the second separator and/or the first separator of the adjacent fuel cell unit to form a cooling medium flow channel;

and attaching (attachment) gas guide flow channel ribs to the outer side surfaces of the first and/or second gas diffusion layers, and/or attaching gas guide flow channel ribs to the inner side surfaces of the first and/or second separators, pressing the first separator against the outer side surfaces of the first gas diffusion layers, and pressing the second separator against the outer side surfaces of the second gas diffusion layers to form a gas guide flow channel, thereby forming a fuel cell unit.

The manufacturing method of a fuel cell unit according to claim 22, wherein the cooling medium flow path and the gas introduction flow path are formed on the corresponding separator surface and/or gas diffusion layer surface in a coating, printing, spraying, or transferring manner.

The manufacturing method of a fuel cell unit according to claim 22, wherein surfaces of the separators and/or the gas diffusion layers for attaching the cooling medium flow path and the gas introducing flow path are smooth.

The manufacturing method of a fuel cell unit according to claim 22, wherein the cooling medium flow path and the gas introducing flow path are made of a material different from the separator and/or the gas diffusion layer.

The method for manufacturing a fuel cell unit according to claim 22, wherein the material of the cooling medium flow path and the gas introduction flow path is a highly conductive material.

The manufacturing method of a fuel cell unit according to claim 22, wherein the cooling medium flow path and the gas introducing flow path include rib and channel portions for controlling the flow of the reaction fluid and the fluid permeation.

The method of manufacturing a fuel cell unit according to claim 27, wherein the gas introducing flow path further includes a bottom portion that carries the rib.

The fuel cell unit manufacturing method according to claim 28, wherein the rib and the bottom of the gas introduction flow path are formed in a full-surface coated manner.

The method of manufacturing a fuel cell unit according to claim 28, further comprising subjecting part or all of the top surfaces of the gas guide flow path rib portions and the bottom surfaces of the channel portions to hydrophilic treatment.