Method for testing complete exchange capacity of deionizer for fuel cell

Abstract

The invention discloses a method for testing the complete exchange capacity of a deionizer for a fuel cell, which comprises the following steps of: respectively carrying out saturated replacement on anion resin and cation resin contained in the deionizer under the condition of not disassembling the deionizer, and measuring and calculating the complete exchange capacity of the deionizer according to the consumption of a reagent. Through the testing method, the actual complete ion exchange capacity of the deionizer can be accurately measured, and the actual complete ion exchange capacity is compared with the nominal capacity of a product under the condition that the deionizer is not disassembled so as to distinguish whether a quality problem exists or not and serve as a basis for receiving or not. Test equipment involved in the testing method is simple, and the test process is fast; the testing method does not need to perform structural damage on a test product, does not relate to sensitive data of a supplier, and is very close to the actual exchange capacity of the deionizer.

Description

technical field [0001] The invention relates to the field of proton exchange membrane fuel cell systems, in particular to a method for testing the complete exchange capacity of a deionizer used in a fuel cell system. Background technique [0002] As a clean, environmentally friendly and highly efficient energy conversion device, fuel cells have attracted more and more attention from various countries with the gradual maturity of fuel cell technology, especially in my country. The policy of vigorously supporting the development of hydrogen energy has been implemented, and the application of fuel cell systems in vehicles has entered the batch stage. The normal operation of the fuel cell system is inseparable from the deionized water cycle, and needs to maintain a low conductivity. Generally speaking, the designed water cycle ion concentration of the commercial standard fuel cell system needs to be maintained below 5μs / cm. The water circulation system of the fuel cell system is...

AI Technical Summary

Problems solved by technology

[0003] (1) One of the currently commonly used verification methods is to use NaCl reagent to perform a saturation displacement test on the deionizer, that is, under certain conditions, the amount of NaCl reagent absorbed by the deionizer when it reaches the set working stop point does not Calculate the ion exchange capacity of the deionizer based on this method; the disadvantage of this method is that it often cannot truly reflect the ion exchange capacity of the deionizer. The reason is that the resin formulations of different manufacturers are not the same. , and the type of ion release in the target application environment, the anion and yang resins of the actual deionizer are not configured strictly according to a fixed ratio;

Because many variable factors such as the ion release level of the system and the types of ion release will vary greatly during different operati