Disclosure of Invention
The invention provides a method and a device for measuring the residual hydrogen amount of a hydrogen storage device, which are used for solving the problems in the prior art.
The invention aims to provide a method and a device for measuring the residual hydrogen amount of a metal hydride hydrogen storage device for a hydrogen-oxygen fuel cell, which are used for meeting the measurement requirement of the residual hydrogen amount of the metal hydride hydrogen storage device for the hydrogen-oxygen fuel cell.
The invention is based on the following principle:
when the fuel cell is in operation, 1mol of hydrogen can generate 2mol of electrons, i.e. electricity
The amount of hydrogen consumed can be measured by measuring the accumulated electric quantity of the hydrogen-oxygen fuel cell, so that the residual hydrogen quantity of the metal hydride hydrogen storage device can be calculated by the following formula:
Ci=C0-(I×t×22.4×n)/(2×96500×η)
wherein
CiResidual Hydrogen quantity (SL)
C0Hydrogen storage Container nominal Capacity (SL)
I-fuel cell output Current (A)
t-time(s)
n-number of cells in the stack
η -Hydrogen consumption efficiency of Fuel cell
The current of the hydrogen-oxygen fuel cell is detected by a current sensor, the detected data is transmitted to the single chip microcomputer, the single chip microcomputer reversely calculates the consumption of hydrogen by current time integration and calculation, and the residual hydrogen amount of the hydrogen storage device is calculated by the total amount of the metal hydride hydrogen storage device; and then the single chip microcomputer outputs the obtained data to a display.
The working mode and the steps of the invention are as follows:
1. presetting initial value
And presetting the hydrogen quantity of the hydrogen supply system and the conversion efficiency of the fuel cell, and storing the preset values in the singlechip as the total hydrogen capacity of the hydrogen supply system.
2. Setting the gradation value of a hydrogen meter
The total hydrogen supply amount of the hydrogen supply system is divided into a plurality of grades, and the corresponding hydrogen amount value is calculated to be used as a comparison standard value of the residual hydrogen amount display part of the metal hydride hydrogen storage device.
3. System zero setting
Detecting whether the stored value of the residual hydrogen amount detection device is zero or whether the stored value is manually set to zero, if the stored value is zero or the stored value is manually set to zero, prompting to replace the hydrogen storage device, and returningto the preset value stage 1; if not, continuing to run the next step.
4. Real-time detection, comparison and calculation of hydrogen consumption
The total output electric quantity of the hydrogen-oxygen fuel cell can be obtained by detecting the output of the current sensor and accumulating the electric quantity output of the current sensor, and meanwhile, the numerical value of the hydrogen consumption quantity of the hydrogen-oxygen fuel cell can be calculated.
5. Calculating the residual hydrogen amount
And comparing the value of the consumed hydrogen amount with the total hydrogen amount preset in the singlechip to obtain the value of the residual hydrogen amount.
6. Comparing and displaying the remaining amount
The value of the residual hydrogen amount is compared with each grading value preset in the singlechip, and the residual hydrogen amount can be displayed.
7. The above steps are repeatedly executed, and the residual hydrogen quantity of the hydrogen storage device can be measured and displayed in real time.
The method for measuring the residual hydrogen amount of the hydrogen storage device adopts the following technical scheme:
the method for measuring the residual hydrogen amount of the hydrogen storage device comprises the following measuring processes:
1. measuring the output current of the hydrogen-oxygen fuel cell;
2. carrying out data processing on the output current to obtain the hydrogen quantity consumed by the hydrogen storage device;
3. comparing the capacity of the hydrogen storage device with the consumed hydrogen amount to obtain the residual hydrogen amount of the hydrogen storage device;
4. the amount of hydrogen remaining in the hydrogen storage vessel is displayed.
The method for measuring the residual hydrogen amount of the hydrogen storage device can also adopt the following technical measures:
the method for measuring the residual hydrogen amount of the hydrogen storage device is characterized in that a current sensor is used for measuring the output current of the hydrogen-oxygen fuel cell.
The method for measuring the residual hydrogen amount of the hydrogen storage device is characterized in that time integration data processing is carried out on the output current to measure the output electric quantity, and then the hydrogen amount consumed by the hydrogen storage device is obtained.
The measuring device for the residual hydrogen amount of the hydrogen storage device adopts the following technical scheme:
the measuring device for the residual hydrogen amount of the hydrogen storage device consists of a direct current sensor, a data processing controller and a display, wherein the direct current sensor is connected with the data processing controller through a circuit, and the data processing controller is connected with the output display through a circuit.
The measuring device for the residual hydrogen amount of the hydrogen storage device can also adopt the following technical measures:
the measuring device for the residual hydrogen amount of the hydrogen storage device is characterized in that: the direct current sensor is a Hall effect open loop current sensor, a magnetic balance current sensor or a reluctance current sensor.
The measuring device for the residual hydrogen amount of the hydrogen storage device is characterized in that: the measuring range of the direct current sensor is 0.1 mA-1000A.
The measuring device for the residual hydrogen amount of the hydrogen storage device is characterized in that: the data processing controller is a singlechip.
The measuring device for the residual hydrogen amount of the hydrogen storage device is characterized in that: the data output display is a luminous tube, an LED nixie tube or an LCD nixie tube. The invention has the advantages and positive effects that:
the invention has the advantages of simple measurement, convenient use, reliable data, low manufacturing cost, scientific and reasonable design and the like, and can be widely applied to the measurement of the residual hydrogen quantity of the hydrogen storage device for various fuel cells.
Detailed Description
To further understand the technical contents, features and effects of the present invention, the following examples are illustrated and described in detail with reference to the accompanying drawings:
example 1
Referring to the attached figure 1, the measuring device for the residual hydrogen amount of the hydrogen storage device consists of a Hall effect open-loop direct current sensor 1 with the measuring range of 30A, a data processing control singlechip 2 and a display 3. The Hall effect open-loop direct current sensor 1 is connected with the singlechip 2 through a circuit, and the singlechip 2 is connected with the display 3 through a circuit. The display 3 is shown with 4 different leds.
Example 2
Referring to the attached figure 1, the measuring device for the residual hydrogen amount of the hydrogen storage device consists of a magnetic balance current sensor 1 with a measuring range of 50A, a data processing control singlechip 2 and a display 3. The magnetic balance current sensor 1 is connected with the singlechip 2 through a circuit, and the singlechip 2 is connected with the display 3 through a circuit. The display 3 is displayed by 3 different LED nixie tubes respectively.
Example 3
Reference is made to fig. 1, fig. 2 and example 1. The metal hydride hydrogen storage device with the nominal capacity of 600SL is used for supplying hydrogen for 500W fuel cells, the number of single cells in a stack is 60, and the hydrogen consumption efficiency of the cells is 80%. The method for measuring the residual hydrogen amount of the hydrogen storage device comprises the following measuring steps:
1. presetting initial value
The total hydrogen quantity value 600 of the hydrogen supply system and the conversion efficiency 80% of the fuel cell are preset on the singlechip 2.
2. Setting the gradation value of a hydrogen meter
The total hydrogen supply is divided into 4 grades which are respectively as follows: 80%, 40%, 20%, 5%, and setting corresponding hydrogen gas values as comparative standard values for displaying the residual hydrogen gas amount of the metal hydride hydrogen storage device.
3. Systemzero setting
Detecting whether the stored value of the residual hydrogen amount detection device is zero or whether the stored value is manually set to zero, if the stored value is zero or the stored value is manually set to zero, prompting to replace the hydrogen storage device, and returning to the preset value stage 1; if not, continuing to run the next step.
4. Real-time detection, comparison and calculation of hydrogen consumption
The Hall effect open-loop direct current sensor 1 detects the current output by the hydrogen-oxygen fuel cell, the current change is transmitted to a pin of the singlechip 2 in the form of voltage change, the singlechip 2 obtains the total output electric quantity through conversion, comparison and integral accumulation, and the numerical value of the hydrogen consumption of the hydrogen storage device is calculated according to the electric quantity.
5. Calculating the residual hydrogen amount
The value of the amount of consumed hydrogen is compared with the total amount of hydrogen preset in the single chip microcomputer 2, and the value of the amount of remaining hydrogen can be obtained.
6. Comparing and displaying the remaining amount
The value of the residual hydrogen amount is compared with each step value preset in the singlechip 2, and the residual hydrogen amount can be displayed in the display 3.
The steps are repeatedly executed, and the residual hydrogen quantity can be measured in real time. When the residual hydrogen amount is larger than the first gear set value, the first light-emitting diode is lighted, and so on, 4 different light-emitting diodes respectively represent 4 different residual hydrogen amounts, and the residual hydrogen amount of the metal hydride hydrogen storage device for the hydrogen-oxygen fuel cell can be visually represented when the metal hydride hydrogen storage device is actually used.