CN-121528958-B - Method for measuring residual hydrogen content of solid hydrogen storage

CN121528958BCN 121528958 BCN121528958 BCN 121528958BCN-121528958-B

Abstract

The invention discloses a method for measuring residual hydrogen content of solid hydrogen storage, which belongs to the technical field of solid hydrogen storage and comprises the steps of calculating first hydrogen consumption according to specific power of a galvanic pile and voltage of the galvanic pile, calculating the first hydrogen consumption according to the drift diameter and duty ratio of an exhaust valve, and calculating the second hydrogen consumption according to the pre-acquired ambient temperature and ambient pressure, and calculating the first residual hydrogen according to the total weight of the hydrogen, the first hydrogen consumption and the second hydrogen consumption. According to the invention, the hydrogen consumption of the hydrogen tail gas is calculated more accurately through the parameters of the exhaust valve and the environmental parameters, so that the more accurate first hydrogen residual quantity is obtained, and the more accurate residual hydrogen calibration is realized. The invention further obtains the second residual hydrogen quantity according to the hydrogen pressure value and the hydrogen storage mass density of the pre-obtained hydrogen storage module, and calibrates the first residual hydrogen quantity through the second residual hydrogen quantity, so that the accuracy of residual hydrogen quantity calibration is further improved.

Inventors

DING CHENG
Xue qiong
WANG JIA

Assignees

上海徐工智能科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260113

Claims (6)

1. A method for measuring the residual hydrogen content of solid hydrogen storage, which is characterized in that the method is applicable to a fuel cell automobile system, wherein the fuel cell automobile system comprises a hydrogen storage module and a fuel cell stack; the anode chamber of the fuel cell stack is provided with an exhaust port for purging tail gas, and the exhaust port is provided with an exhaust valve; The method for measuring the residual hydrogen content of the solid-state hydrogen storage comprises the following steps: Acquiring the total weight of hydrogen in a full state of the hydrogen storage module; collecting specific power, voltage and total current of a fuel cell stack for electrochemical reaction, and calculating to obtain first hydrogen consumption according to the specific power, the voltage and the total current of the fuel cell stack; Calculating to obtain a second hydrogen consumption according to the drift diameter and the duty ratio of the exhaust valve and the environment temperature and the environment pressure which are acquired in advance; Calculating to obtain a first residual hydrogen amount according to the total weight of the hydrogen, the first hydrogen consumption amount and the second hydrogen consumption amount; Calculating to obtain a second residual hydrogen amount according to the hydrogen pressure value of the hydrogen storage module and the hydrogen storage mass density of the hydrogen storage module obtained in advance; calibrating the first residual hydrogen amount according to the second residual hydrogen amount, and outputting the calibrated first residual hydrogen amount as a final measurement result; The first residual hydrogen amount is obtained according to the total weight of the hydrogen, the first hydrogen consumption amount and the second hydrogen consumption amount Is expressed by the following formula: ; In the formula, Indicating the total weight of hydrogen in the full state of the hydrogen storage module, Indicating the first hydrogen consumption amount, Representing a second hydrogen consumption amount; the second hydrogen consumption The calculation formula of (2) is as follows: ; In the formula, Indicating a theoretical hydrogen discharge amount; Representing the correction coefficient of the vent valve drift diameter; indicating the duty cycle of the hydrogen discharge valve control; Representing a dynamic environment compensation coefficient, and calculating and acquiring according to the environment temperature and the environment pressure; Indicating the running time of the system, and correcting the coefficient of the drift diameter of the exhaust valve Is expressed by the following formula: ; In the formula, And All of which represent the correction factors, Representing the vent valve path, the dynamic environment compensation coefficient The calculation formula of (2) is as follows: ; In the formula, Represents the atmospheric pressure under actual ambient conditions; represents atmospheric pressure under standard conditions; representing the actual ambient temperature; Representing the ambient temperature under standard conditions; represents the ambient gas molar mass; representing an ambient gas constant; The calibration includes determining whether the first remaining amount of hydrogen m is equal to the second remaining amount of hydrogen If m is equal to Unequal correction coefficient for vent valve drift diameter Dynamic environmental compensation coefficient Optimizing; specifically, the optimization process includes: For compensation coefficient Calibrating, namely placing a calibration system in a preset environment bin for testing to obtain accuracy 、 ; Adjusting correction factors In (a) and (b) 、 Correction coefficients such that And acquiring the first residual hydrogen amount after calibration, and outputting the first residual hydrogen amount as a final measurement result.
2. The method for measuring the residual hydrogen content of solid hydrogen storage according to claim 1, wherein the theoretical hydrogen discharge amount Is obtained by calculation of a one-dimensional simulation model of the fuel cell stack.
3. The method for measuring the residual hydrogen content of solid hydrogen storage according to claim 1, wherein the total weight of hydrogen gas The calculation mode is that the original weight of the hydrogen storage module is subtracted from the mass of the hydrogen storage module filled with hydrogen.
4. The method according to claim 1, wherein the hydrogen pressure value of the hydrogen storage module is a hydrogen pressure value obtained by detecting in a state where the temperature of the hydrogen storage module is at a set temperature.
5. The method for measuring the residual hydrogen content of solid hydrogen storage according to claim 4, wherein the hydrogen storage module is connected with an antifreeze circulation system including a PTC heater for heating the antifreeze and a circulation pump for driving the antifreeze to circulate; The PTC heater is matched with the circulating pump so that the temperature of the hydrogen storage module is in a set temperature state.
6. The method according to claim 5, wherein calculating a second remaining hydrogen amount based on the hydrogen pressure value of the hydrogen storage module and a hydrogen storage mass density of the hydrogen storage module obtained in advance, comprises: Acquiring a pressure-concentration-temperature curve of the hydrogen storage material at a set temperature according to the attribute of the hydrogen storage material of the hydrogen storage module; Acquiring the hydrogen storage mass density of the hydrogen storage module based on the pressure-concentration-temperature curve and the hydrogen pressure value; And calculating to obtain the second residual hydrogen amount according to the hydrogen storage mass density and the total mass of the hydrogen storage material.

Description

Method for measuring residual hydrogen content of solid hydrogen storage Technical Field The application relates to the technical field of solid-state hydrogen storage, in particular to a method for measuring residual hydrogen content of solid-state hydrogen storage. Background Hydrogen storage technologies are largely divided into material hydrogen storage and physical hydrogen storage, wherein physical hydrogen storage includes gaseous hydrogen storage and liquid hydrogen storage. Gaseous hydrogen storage has become the current commercialized hydrogen storage technology due to the advantages of high hydrogen filling and discharging speed, low hydrogen storage energy consumption, low cost, mature technology and the like. The solid-state hydrogen storage technology is considered as one of the best hydrogen storage modes for off-grid power generation by matching with renewable energy sources because of the advantages of high volume hydrogen storage density, good safety, no need of a high-pressure container, capability of improving the purity of hydrogen and the like. However, in the prior art, there is always a deviation in calculation of the amount of hydrogen remaining in the solid-state hydrogen storage, which makes the solid-state hydrogen storage unable to know the remaining hydrogen content during application, resulting in user complaints. On the other hand, the solid-state hydrogen storage system which is not used up has potential safety hazard when directly carrying out hydrogen charging. The estimation algorithm of the residual hydrogen quantity of the current solid-state hydrogen storage system is mainly to reduce the hydrogen consumption quantity after the dehydrogenation and electric conversion by the initial weight and estimate the hydrogen discharge quantity by an empirical model (or directly neglect). This will result in a large deviation in the amount of remaining hydrogen, and also lack a means of calibrating the amount of remaining hydrogen during operation of the system. Please refer to patent document with publication number CN 106052791A, a method for measuring residual hydrogen amount of solid hydrogen storage device is disclosed, which comprises injecting hydrogen into a constant volume container, measuring pressure and temperature of hydrogen, correcting the pressure and temperature of hydrogen in the constant volume container to obtain hydrogen amount under standard state, accumulating the hydrogen amount discharged each time by a data processing controller, comparing with initial hydrogen amount of solid hydrogen storage device to obtain residual hydrogen amount of solid hydrogen storage device, and displaying residual hydrogen amount of solid hydrogen storage device. The measuring device for the residual hydrogen quantity of the solid Chu Qingqi consists of a solid hydrogen storage device, a pressure reducer, pressure and temperature sensors, an electromagnetic valve, a constant volume container, a data processing controller and a display. The patent document with the publication number CN 118117126A discloses a device, a method, a computer readable storage medium and a product for estimating the residual hydrogen amount of a fuel cell system based on solid-state hydrogen storage, wherein the device comprises a solid-state hydrogen storage bottle, a fuel cell stack, an electronic load, an ammeter, a current integration module and a fuel cell controller, the solid-state hydrogen storage bottle is used for storing hydrogen in a solid material, an outlet of the solid-state hydrogen storage bottle is connected with a hydrogen inlet of the fuel cell stack, a hydrogen outlet of the fuel cell stack is connected with the electronic load, the ammeter is respectively connected with the electronic load, the current integration module and the fuel cell stack, the ammeter is used for collecting current of the electronic load, the current integration module is used for integrating the current, the fuel cell controller is connected with the current integration module, and the fuel cell controller is used for calculating the residual hydrogen amount of the fuel cell system according to the current integration. The invention can enable users and operation and maintenance personnel to monitor the residual hydrogen quantity of the fuel cell system in real time. The patent document with the publication number CN 118376926A discloses a method for estimating the residual electric quantity percentage of a solid hydrogen storage fuel cell power supply, which comprises the steps of recording operation data of an actual hydrogen fuel cell in a rated working condition operation device according to the operation of the solid hydrogen storage fuel cell after the solid hydrogen storage fuel cell is full of hydrogen, calculating the output electric quantity according to the output voltage and current of the fuel cell, and accumulating to obtain the rated output electric quantity of the solid hydrogen storage fue