High-power-density PEMFC (proton exchange membrane fuel cell) pile
A high power density, electric stack technology, applied in the direction of circuits, fuel cells, electrical components, etc., can solve the problems of weight and volume, and achieve the effect of reducing weight and volume, reducing volume, and reducing weight
Active Publication Date: 2016-03-23
江苏氢电新能源有限公司
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Problems solved by technology
In this public document, it includes electrolyte membrane layer, catalyst layer, gas diffusion layer and the outermost separator. Although no bipolar plate is set, the separator has the same function as the bipolar plate in terms of shape and function. It is consistent. Compared with the bipolar plate, it has reduced some weight, but it still occupies a certain weight and volume, which cannot fundamentally solve the problem.
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Embodiment 1
[0034] Example 1: A high power density PEMFC stack, including end plates 1 on both sides, collector plates 2 fixed inside the end plates 1, and several unit cells repeatedly stacked between the collector plates 2 on both sides, each unit The battery includes a three-in-one membrane electrode 3 and an anode-specific plate 4 and a cathode-specific plate 5 respectively distributed on both sides of the membrane electrode;
[0035] The thickness of the special plate 4 for the anode is 0.6~3mm, the porosity is 50~80%, and the pore diameter is 0.1~3μm. The designed flow field suppresses the anode gas flow field 41, and the depth of the flow field is 0.3-1 mm.
[0036] Preferably, the thickness of the anode-specific plate 4 is 1.2 mm, the porosity is 70%, the pore diameter is 1.5 μm, the depth of the anode gas flow field 41 is 0.6 mm, and the flow field formed by the anode gas flow field 41 is a serpentine flow field .
[0037] The cathode plate 5 has a thickness of 0.6-3 mm, a po...
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Abstract
The invention discloses a high-power-density PEMFC (proton exchange membrane fuel cell) pile. The pile comprises end plates on two sides, collector plates fixed on inner sides of the end plates as well as multiple elementary cells repeatedly piled between the collector plates on two sides, wherein each elementary cell comprises a three-in-one membrane electrode and special polar plates which are distributed on two sides of the three-in-one electrode and used for PEMFCs, one surface of the special polar plate is a flat plate surface, a gas flow field is pressed on the other surface according to the designed flow field, the flat plate surface is attached to the three-in-one membrane electrode, and the flow field surface is closely attached to a conductive connector made of a metal material or a non-metal material. Bipolar plates are not used for the pile, the weight of the pile is substantially reduced, the specific power density is increased, and the production cost of the pile is reduced; the assembly efficiency of the pile is improved and the process of fuel cell industrialization is accelerated.
Description
technical field [0001] The invention belongs to the field of fuel cells, in particular to a high power density PEMFC (proton exchange membrane fuel cell) electric stack. Background technique [0002] The proton exchange membrane fuel cell is a device that converts the chemical energy of hydrogen into electrical energy. Its advantages are that the product is water, zero emission and no pollution, low noise, and high conversion efficiency. The working temperature can operate in low temperature environment, it is the first choice for mobile power supply, base station power supply and fixed power supply. A traditional fuel cell consists of membrane electrodes, bipolar plates, collector plates, end plates and fasteners. Due to the low voltage of a single polymer membrane fuel cell, in practical applications, multiple battery cells are stacked together and connected in series to form a stack. [0003] Lightweight and compact structure is one of the key points in the future devel...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H01M8/0243H01M8/0258H01M8/2465
CPCH01M8/0243H01M8/0258H01M8/2465Y02E60/50Y02P70/50
Inventor 程立明魏广科
Owner 江苏氢电新能源有限公司