Fuel cell

Abstract

The invention provides a fuel cell. The fuel cell comprises, sequentially superposed, an anode plate, an anode sealing sheet, a membrane electrode, a cathode sealing sheet and a cathode plate. According to the fuel cell provided in the invention, the anode sealing sheet is arranged between the anode plate and the membrane electrode, the cathode sealing sheet is arranged between the cathode plate and the membrane plate, the sealing sheets are difficult to age in the long-term use process, the fuel cell has a very good sealing performance after the sealing sheets and other assemblies are fixed, and there is no need to arrange sealing grooves on edges of the anode plate and the cathode plate during the sealing of the fuel cell. The fuel cell has the advantages of simple manufacturing process and short manufacturing period, and the sealing sheets of the fuel cell can be repeatedly used, are convenient to dismount and mount, and are suitable for the batch production.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a fuel cell. Background technique [0002] Direct Methanol Proton Exchange Membrane Fuel Cell, also known as Direct Methanol Fuel Cell (DMFC), is a new type of device that directly converts chemical energy into electrical energy. Direct methanol fuel cell has high energy conversion efficiency due to no internal consumption of rotating parts, no combustion, and energy conversion efficiency is not controlled by Carnot cycle; no sulfur oxide and nitrogen oxide emissions, no harm to the environment; working Mild conditions, as well as small size, light weight, safety and durability, are suitable for mobile energy applications and are also ideal power sources. [0003] The core component of a direct methanol fuel cell is a membrane electrode, which consists of a proton exchange membrane, a cathode and an anode distributed on both sides of the membrane, and some also include a diff...

AI Technical Summary

Problems solved by technology

In addition, due to the insufficient voltage and power provided by a single battery, it is difficult to meet the requirements of use, so multiple batteries need to be stacked in series, and sealing treatment is also required between these series batteries

[0004] The existing sealing technology mainly includes glue sealing, that is, the electrode plate and the membrane electrode are bonded together with encapsulation glue, but the encapsulation glue is prone to aging or bubbles during the long-term operation of the battery, and gradually loses the sealing effect

Groove line packaging, that is, grooves are set on the electrode plate, and elastic sealing material is poured into the groove to form a sealing strip. This sealing method usually requires hardening of the edge of the membrane electrode, and the process is relatively complicated. Plate seals are prone to misalignment, resulting in poor local sealing

Another sealing method is to use a curable sealant, that is, first use a mold to fix the components of the battery such as membrane electrodes, plates, etc., then pour the curable sealant into the mold, and then irradiate it with actinic radiation. The sealant forms a sealed structure. Although this method has a good sealing effect, the process is complicated and the cycle is long

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