JP2007138973A - Hydrogen filling method and hydrogen filling monitoring device to hydrogen storage vessel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To quantitatively indicate residual time reaching completion of filling when filling hydrogen in a hydrogen storage alloy vessel. <P>SOLUTION: This device has measuring means 10 and 13 for measuring a physical quantity of changing in response to filling progress with every predetermined time when filling the hydrogen in a hydrogen storage vessel, an approximate expression calculating means 20 for fitting a time change in the physical quantity to an approximate expression and a residual time calculating means 20 for calculating the residual time up to completing the filling on the basis of the approximate expression. Predictive time of the filling completion of the hydrogen can be easily calculated. Filling work can be efficiently performed. When continuously filling the hydrogen in a plurality of hydrogen storage vessels, the filling work can be shortened by predicting filling completion time even if an initial hydrogen residual quantity is different with every vessel. A general user can effectively use the time by predication of hydrogen filling time. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a hydrogen filling method and a hydrogen filling monitoring apparatus when filling a hydrogen storage container using a hydrogen storage material such as a hydrogen storage alloy with hydrogen.

In a hydrogen storage container using a hydrogen storage material such as a hydrogen storage alloy, after hydrogen is released, it is refilled with hydrogen and used repeatedly. In the conventional hydrogen filling method for this hydrogen storage container, ingenuity has been made, such as shortening the filling time technology and automation technology, but no technology for quantitatively predicting the time until the filling is completed has been studied. It was. Therefore, when filling hydrogen storage containers with different amounts of hydrogen each time, the pressure, temperature, or hydrogen flow rate of the storage container connected to the filling device is periodically checked to determine whether filling is complete. There is a need to. For this reason, it is difficult to desire an efficient filling operation when continuously filling a plurality of storage containers with hydrogen. As an apparatus for detecting completion of hydrogen filling, there is one proposed in Patent Document 1. In this apparatus, the hydrogen flow rate is adjusted so as to keep the temperature of the hydrogen storage alloy container constant, and it is determined that the hydrogen filling is completed when the full filling pressure based on the PCT characteristics of the alloy is reached.
JP-A-8-128597

However, in the technique described in Patent Document 1, the completion of filling can be known to some extent accurately, but the hydrogen flow rate is adjusted as needed so that the temperature of the hydrogen storage container is constant, and therefore the hydrogen flow rate is not adjusted. Compared with this, the filling time becomes longer and the apparatus cost becomes higher. Above all, since it is impossible to calculate the estimated time until filling, efficient hydrogen filling cannot be expected.
In addition, although the time required for hydrogen filling may be over one hour, if the time to completion of filling cannot be predicted quantitatively, a general user fills the hydrogen storage container with hydrogen in the hydrogen filling facility. When doing so, there is a problem that it is not possible to know when it will end and the time cannot be used effectively.

  The present invention has been made against the background of the above circumstances, and an object thereof is to provide a hydrogen filling method and a hydrogen filling monitoring device capable of calculating an estimated time until completion of hydrogen filling.

  That is, among the inventions of the hydrogen filling method of the hydrogen storage container according to the present invention, the invention according to claim 1 is configured such that when hydrogen is filled into the hydrogen storage container, a predetermined physical quantity that changes according to the progress of the hydrogen filling is determined for a predetermined time. The measurement is performed every time, and the time change of the physical quantity is fitted to an approximate expression to calculate the predicted time for completion of the hydrogen filling.

  According to a second aspect of the invention of the method for filling hydrogen into the hydrogen storage container, in the first aspect of the invention, the calculation of the estimated time for completion of filling is obtained from the approximate expression based on the physical quantity indicated when filling is completed. It is characterized by.

  The invention of the method for filling hydrogen into the hydrogen storage container according to claim 3 is the invention according to claim 1 or 2, wherein during the measurement, the approximate expression is corrected in a timely manner based on the change in the physical quantity, and the correction is made. The predicted time until the completion of the hydrogen filling is calculated again based on the approximate expression.

  According to a fourth aspect of the present invention, there is provided a method for filling hydrogen into a hydrogen storage container according to any one of the first to third aspects, wherein the physical quantities include a flow rate of charged hydrogen, hydrogen pressure, hydrogen storage container weight, and hydrogen storage container temperature. , Cooling medium temperature, hydrogen storage container surface distortion, or supply-side hydrogen remaining amount.

  The invention of the method for filling hydrogen into the hydrogen storage container according to claim 5 is the invention according to any one of claims 1 to 4, wherein it is determined whether or not the calculated filling completion time is abnormal. It is characterized by.

  The invention of a hydrogen filling method for a hydrogen storage container according to claim 6 is characterized in that, in the invention according to claim 5, when it is determined that the calculated filling completion time is abnormal, the abnormal time control is performed. Features.

  According to a seventh aspect of the present invention, there is provided the method for filling hydrogen into a hydrogen storage container according to the sixth aspect of the invention, wherein the abnormality control is a notification that informs the abnormality.

  An invention of a method for filling hydrogen into a hydrogen storage container according to claim 8 is the invention according to claim 6 or 7, wherein the abnormal control automatically stops the hydrogen filling process. And

  The invention of the hydrogen filling monitoring device according to claim 9 is obtained by a measuring means for measuring a predetermined physical quantity that changes according to the progress of filling of hydrogen into the hydrogen storage container every predetermined time, and the measuring means. Approximate expression calculating means for fitting the time change of the physical quantity to an approximate expression, and remaining time calculating means for calculating the remaining time until completion of filling based on the approximate expression.

  According to a tenth aspect of the present invention, there is provided the hydrogen filling monitoring apparatus according to the ninth aspect, further comprising notifying means for notifying the remaining time calculated by the remaining time calculating means.

  The hydrogen filling monitoring device according to claim 11 is the remaining time abnormality determining means for determining whether or not the remaining time calculated by the remaining time calculating means is abnormal in the invention according to claim 9 or 10. It is characterized by providing.

  A hydrogen filling monitoring device according to a twelfth aspect of the invention according to any one of the ninth to eleventh aspects, wherein an abnormality control means for performing an abnormal operation when an abnormality determination is made by the abnormality determination means. It is characterized by providing.

  According to a thirteenth aspect of the present invention, there is provided the hydrogen filling monitoring device according to the twelfth aspect, wherein the abnormal operation is an operation for notifying that the abnormality is abnormal.

  According to a fourteenth aspect of the present invention, there is provided the invention according to the twelfth or thirteenth aspect, wherein the abnormal operation is an operation for automatically stopping the hydrogen filling process.

That is, according to the method for filling hydrogen into the hydrogen storage container of the present invention, filling is completed by periodically measuring physical quantities such as hydrogen flow rate and temperature at the time of filling with hydrogen, and fitting the change over time to an appropriate approximate expression. The estimated time until can be calculated sequentially.
It is appropriate that the physical quantity to be measured is accompanied by a change that can be measured from the beginning to the end of filling. In addition, the time interval in the measurement can be appropriately determined in consideration of the fact that the approximate expression can be appropriately calculated. The applicable physical quantities and their characteristics are listed below.

(Filling hydrogen flow rate)
FIG. 1 shows the change over time associated with the filling of the hydrogen flow rate. Immediately after the start of filling, the internal pressure of the container is lower than the filling pressure, so the filling hydrogen flow rate rapidly increases and reaches a peak, but the flow rate drops because the pressure quickly balances. Thereafter, the hydrogen flow rate settles to a value equal to the hydrogen absorption rate of the hydrogen storage material and gradually decreases until filling is completed. When hydrogen is fully filled, the flow rate becomes zero. The filling hydrogen flow rate can be measured by arranging, for example, a flow meter in a supply pipe used for filling.

(Hydrogen pressure)
FIG. 2 shows a change with time in filling the hydrogen storage container pressure. Immediately after the start of filling, the internal pressure of the container rapidly increases until reaching the same value as the filling pressure. This is because the hydrogen absorption rate of the hydrogen storage material is low and the hydrogen supply is excessive, so that there is almost no pressure difference between the filling pressure and the container internal pressure. However, since there is a slight differential pressure until the completion of filling, it is not impossible to calculate the remaining time using this pressure. The hydrogen pressure can be measured with a pressure gauge, for example.

(Hydrogen storage container weight)
FIG. 3 shows the change with time of filling the container weight. In a general storage container, the weight of hydrogen when fully filled is about several percent compared to the weight of the entire container, which is a change that can be distinguished by sufficient weight measurement. However, when the weight is measured, if there are water droplets or the like attached to the hydrogen storage container or parts are dropped, an error occurs in the estimation of the hydrogen filling progress, which is difficult in actual application. The container weight can be measured by, for example, a load cell.

(Hydrogen storage container temperature)
FIG. 4 shows the change with time of filling of the container surface and the internal temperature. Since the hydrogen storage material generally generates heat when absorbing hydrogen, the container temperature immediately rises immediately after the start of filling. However, since the hydrogen absorption equilibrium pressure of the hydrogen storage material increases with temperature, when the equilibrium pressure reaches a temperature that balances with the filling hydrogen pressure, hydrogen absorption stops and the temperature does not increase any more. On the other hand, since the heat is taken away from the container surface by the external cooling medium, the temperature is gradually lowered and gradually falls. The temperature of the container surface that is more likely to transfer heat begins to drop faster, and the temperature at the center of the container falls later. When filling is completed, the container temperature becomes constant at the cooling medium temperature. The container temperature can be measured by a thermometer using, for example, a thermocouple.

(Cooling medium temperature)
When the cooling medium of the hydrogen storage container is flowing along the flow path, it is possible to read the progress of filling by measuring the difference between the inlet temperature and the outlet temperature. If the flow rate is the same, the temperature difference becomes smaller as the filling proceeds, and the temperature difference becomes 0 when the filling is completed. The cooling medium temperature can also be measured by a thermometer using, for example, a thermocouple.

(Container surface distortion)
FIG. 5 shows the change over time accompanying the filling of the container surface strain. Since the hydrogen storage material generally increases its volume when it absorbs hydrogen, the surface strain of the hydrogen storage container increases with hydrogen filling. When filling is complete, a predetermined amount of strain is reached. The amount of strain can be measured by, for example, a strain meter.

In addition to the above physical quantities, the output of a hydrogen fuel gauge that is expected to be developed in the future can also be used for the calculation of the estimated filling completion time. In short, if the physical quantity changes as the hydrogen filling progresses, Other than the above, it can be used for calculation of the remaining time as a measurement target.
The physical quantity is not particularly limited as long as it can be measured using a measuring means such as a known measuring apparatus, and the configuration of the measuring means is not particularly limited as the present invention.

The measured physical quantity data can be recorded in a programmable computer or the like together with the elapsed time data at that time. The storage can be performed on storage means such as RAM, flash memory, and HDD that can be written and read at any time.
In addition, since each physical quantity is not stable at the initial stage of filling, the measurement may be started after waiting for an appropriate time after the filling is started. When the necessary number of data corresponding to the order of the approximate expression (the number of required data is at least n + 1 sets in the case of the n-order expression) is collected, the approximate expression parameter is calculated and fitting to the approximate expression is performed. The calculation can be performed by an approximate expression calculation unit configured by a CPU and a program for operating the CPU. Once the approximate expression has been derived, the elapsed time can be calculated by substituting the filling completion index value into the physical quantity variable. The index value at this time may be set to a theoretically reached value such as 0 when the charged hydrogen flow rate is used, or the cooling medium temperature if the vessel surface temperature is used, but is arbitrarily set from the result of the preliminary test. Is desirable. The index value is determined according to the physical quantity to be measured. The estimated time until completion of filling can be calculated by subtracting the elapsed time until completion from the elapsed time until completion obtained by the calculation. It is desirable that these sequences are executed every regular measurement, and the filling completion prediction time is sequentially updated.

  The estimated filling completion time obtained can be notified to the user one after another by displaying a specific time on a digital display or indicating the approximate time with several stages of lamps. Notification can be made via means (LAN, network, telephone line, etc.), and the notification method is not particularly limited. When the measured physical quantity reaches the index value for completion of filling, it is also possible to notify the user of the completion of filling by lighting the lamp or by voice.

  Further, it is possible to determine abnormality in preparation for a case where the estimated completion time of filling is extremely long and there is a risk of hydrogen leak or the like. In the abnormality determination, an inter-filling time that is considered appropriate can be set in advance, and it can be determined whether or not there is an abnormality by comparison with the filling completion time. Further, the degree of abnormality may be determined in stages. When it is determined that there is an abnormality, it is possible to perform a predetermined abnormality control. For example, it is possible to send an abnormality notification (alarm or the like) to the operator or maintenance personnel. It is also possible to stop the hydrogen filling operation by controlling the hydrogen filling device.

As described above, according to the method for filling hydrogen into the hydrogen storage container of the present invention, when filling the hydrogen storage container with hydrogen, a predetermined physical quantity that changes according to the progress of filling of the hydrogen is measured every predetermined time, By fitting the time change of the physical quantity to an approximate expression to calculate the predicted time for completion of the hydrogen filling, it is possible to easily predict the time required for hydrogen filling and to perform the filling work efficiently. . For example, when it is necessary to continuously fill a plurality of hydrogen storage containers with hydrogen, and the initial hydrogen remaining amount is different for each container and the time efficiency is not uniform with a uniform filling time, the filling completion time is predicted by the present invention. This is expected to shorten the filling operation. Furthermore, for the general user, by predicting the hydrogen filling time, it is possible to effectively use the time without waiting for the completion of filling unnecessarily.
In addition, when the estimated completion time of filling is extremely long, it is possible to take appropriate measures such as notifying the user of an abnormality when there is a possibility of hydrogen leakage.

  Furthermore, according to the hydrogen filling monitoring apparatus of the present invention, when the hydrogen is filled into the hydrogen storage container, a measuring unit that measures a predetermined physical quantity that changes according to the progress of filling of the hydrogen every predetermined time, and obtained by the measuring unit Since the approximate expression calculating means for fitting the time change of the physical quantity to an approximate expression and the remaining time calculating means for calculating the remaining time until the completion of filling based on the approximate expression are provided, the estimated filling time can be easily calculated. And the above effects can be obtained with certainty.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
The system shown in FIG. 6 includes a hydrogen cylinder 1, a hydrogen supply pipe 2, and a hydrogen storage container 3 that constitute a hydrogen filling apparatus, and a hydrogen supply pipe 2 connected at one end to the hydrogen cylinder 1. A storage container 3 is connected. The hydrogen storage container 3 contains a hydrogen storage alloy (not shown) inside, and the outer surface is covered with a cooling water jacket 4 to which a cooling water introduction pipe 4a and a cooling water discharge pipe 4b are connected. In the above, the cooling method in the hydrogen storage container is an external cooling type, but even an internal cooling type can be similarly applied, and the structure of the hydrogen storage container is particularly limited as the present invention. It is not something.

The hydrogen supply pipe 2 is provided with an on-off valve 5 and a regulator 6 as a hydrogen filling device. The hydrogen supply pipe 2 is provided with electromagnetic on-off valves 11 and 12 on the downstream side of the regulator 6 with a hydrogen flow meter 10 as a measuring means interposed therebetween, and is electrically connected to the control unit 20. ing. With this connection, the measurement result of the hydrogen flow meter 10 can be output to the control unit 20, and the opening / closing operation of the electromagnetic on-off valves 11 and 12 can be controlled by the control unit 20. A thermometer 13 as a measuring means for measuring the outer surface temperature of the hydrogen storage container 3 is installed on the outer surface of the hydrogen storage container 3, and the thermometer 13 is connected to the control unit 20. It is electrically connected and the measurement result can be output to the control unit 20.
The control unit 20 is connected with an indicator 14 that is a notification means for displaying the remaining time of hydrogen filling so that the operator can visually recognize it. Further, a buzzer 14 that notifies the operator with sound is connected. Yes. Also connected to the control unit 20 is a timer 21 for measuring elapsed time and a storage unit 22 such as a flash memory or HDD for storing and reading data.

  The above-described control unit 20 can be configured mainly with, for example, a CPU and a program for operating the CPU. The control unit 20 receives the measurement result of the physical quantity obtained by the hydrogen flow meter 10 and the thermometer 13 described above, and can calculate an approximate expression that fits the temporal change of the physical quantity accompanying hydrogen filling, It has a function as an approximate expression calculation means of the present invention. From the approximate expression obtained above, the hydrogen filling completion prediction time can be calculated by grasping in advance the physical quantity at the completion of hydrogen filling. Therefore, the control unit 20 has a function as remaining time calculation means.

  In addition, the control unit 20 can store filling completion time data determined to be normal in advance in the storage unit 22, read it, and compare it with the predicted filling completion time to determine filling abnormality. it can. Therefore, the control unit 20 has a function as the remaining time abnormality determination means of the present invention. Further, as will be described later, the control unit 20 can control the operations of the electromagnetic on-off valves 11 and 12 and the buzzer 15 in accordance with the abnormality determination, and also has a function as an abnormality control means.

  The control unit 20, the flow meter 10, the electromagnetic control valves 11, 12, the thermometer 13, the indicator 14, the buzzer 15, the timer 21, and the storage unit 22 constitute the hydrogen filling monitoring device of the present invention. The hydrogen filling monitoring device may be independent from the hydrogen filling device, or may be included in the hydrogen filling device.

Next, a hydrogen filling method using the hydrogen filling device and the filling monitoring device will be described with reference to the flowchart of FIG.
At the start of hydrogen filling, the on-off valve 2 and the electromagnetic valves 11 and 12 are opened, and supply of hydrogen from the hydrogen cylinder 1 to the hydrogen storage container 3 through the hydrogen supply pipe 2 is started (step S1). When supplying hydrogen, the flow is adjusted by the regulator 6 and hydrogen is introduced into the hydrogen storage container 3. Further, with the supply of hydrogen, cooling water is passed through the cooling water jacket 4 through the cooling water introduction pipe 4 a and the cooling water discharge pipe 4 b to cool the hydrogen storage container 3. In the hydrogen storage container 3, the heat generation of the hydrogen storage alloy accompanying the hydrogen storage is cooled by the cooling water, and the hydrogen storage proceeds smoothly.

  The above hydrogen filling is continued until a predetermined stable standby time (step S2), and the measurement of the physical quantity is started after the stable standby time has elapsed (step S3). The elapsed time can be determined by counting by the timer 21 described above. At the start of measurement, the filling completion index value qf corresponding to the measured physical quantity and the order k required for the approximate expression are set. The filling completion index value qf and the required order k can be set by storing them in the storage unit 22 in advance and reading them out.

In the measurement of the physical quantity, the flow rate of the hydrogen flowing through the hydrogen supply pipe 2 in the flow meter 10 is measured every predetermined time, and the measurement data is sent to the control unit 20. Similarly, in this measurement, the thermometer 13 measures the outer surface temperature of the hydrogen storage container 3 every predetermined time, and sends the measurement data to the control unit 20. In addition, the measurement data should just be obtained by either the flow meter 10 or the thermometer 13, and it is also possible to use both, respectively.
The measurement data is sequentially obtained as the number of measurement points n, the elapsed time tn, and the measurement physical quantity qn (step s4), and is stored in the data table of the storage unit 22 under the control of the control unit 20 (step s5). In the next step s6, it is determined whether or not the measured physical quantity qn exceeds the filling completion index value qf. If it is determined that the measured physical quantity qn has exceeded, filling is completed (step s7). In step s7, the completion of filling can be notified by the buzzer 15 under the control of the control unit 20, and the electromagnetic on-off valves 11 and 12 can be closed.

If the measured physical quantity qn does not exceed the filling completion index value qf in step s6, it is then determined whether or not the number of measurement points n has reached the required order k (step s8). Here, when the number of measurement points n has not reached the required order k, the process returns to step s4, and the measurement is further continued to increase the number of measurement data.
On the other hand, when it is determined in step s7 that the number of measurement points n has reached the required order k, the control unit 20 reads the data stored in the data table, and calculates an approximate expression based on the data. In step s9, the measurement physical quantity is changed over time. By using the approximate expression, the completion completion elapsed time tf at which filling is completed is calculated using the filling completion index value qf. Next, the elapsed time is integrated, and the accumulated elapsed time is subtracted from the estimated completion elapsed time tf to calculate the remaining time until filling is completed (step s10). The calculation result is digitally displayed on the indicator 14 by the operation of the control unit 20 (step S11). Next, it is determined whether or not the estimated completion elapsed time tf is within the range of the normal hydrogen filling completion time set in advance. If it is out of the range, it is determined that there is an abnormality, and the control processing at the time of abnormality is performed. (Step s13). The normal hydrogen filling completion time can be stored in advance in the storage unit 22, for example, and can be read out as necessary. When the determination is normal, the above processing (steps s4 to s12) is repeated until the measured physical quantity reaches the filling completion index value qf.

In the abnormality control process, as shown in FIG. 8, the measurement by the measuring means is terminated (step s130), and an alarm is issued by the abnormality notification by the buzzer 15 (step s131). The abnormality notification can be distinguished by making the content different from the above-described buzzer notification at the completion of filling. Next, the electromagnetic on-off valves 11 and 12 are closed to stop the hydrogen filling process. This makes it possible to avoid problems due to hydrogen leakage at an early stage. In addition, abnormal determination is performed in stages by setting multiple normal hydrogen filling completion times as indicators, and an alarm is issued when the abnormality is small, and hydrogen is detected when the abnormality is large. You may make it complete filling.
The contents of the present invention have been described above based on the above embodiment, but the present invention is not limited to the above described contents, and can be appropriately changed without departing from the scope of the present invention.

Examples of the present invention will be described below.
In the apparatus configuration shown in FIG. 6, a hydrogen filling test was conducted when a hydrogen storage alloy built-in canister having a rated hydrogen storage amount of 200 NL was used as the hydrogen storage container. The filling hydrogen pressure at this time was 1 MPaG, and the storage container was cooled with cold water at 5 ° C.

In the hydrogen filling test, changes over time of three types of parameters of the hydrogen storage amount (integrated value of the filling hydrogen flow rate), the filling hydrogen flow rate, and the container surface temperature in the filling test are summarized and shown in FIG.
Immediately after the start of filling, both the filling hydrogen flow rate and the container surface temperature rise rapidly, but reach a peak in about 30 seconds to 1 minute, and then gradually decrease. If the filling is completed when the filling hydrogen flow rate is below the measurement limit, it can be read that both the flow rate and the container surface temperature decrease almost linearly until the filling is completed. Accordingly, the filling completion time prediction result when the linear approximation formula is applied using the sequence of FIG. 7 shown in the above embodiment will be described below.

  Each physical quantity is measured at an interval of 1 minute from 2 minutes after both the filling hydrogen flow rate and the container surface temperature are stabilized in a substantially linear decrease. Then, a linear equation by the least square method was derived at the time when three sets of measurement data could be collected, that is, every 2 minutes after 4 minutes. At this time, the filling completion index value of the filling hydrogen flow rate was 1 NL / min, and the filling completion index value of the container surface temperature was 22 ° C. FIG. 10 shows the flow rate of charged hydrogen, and FIG. FIG. 12 shows a comparison between the remaining time until the actual filling is completed and the remaining time predicted from the filling hydrogen flow rate and the container surface temperature. As shown in the figure, the filling hydrogen flow rate and the container surface temperature showed a tendency to coincide with the remaining time until the actual filling was completed as the filling progressed. In particular, since the container surface temperature changes almost linearly, the remaining time can be predicted with very good accuracy by linear approximation.

It is a schematic diagram which shows the time-dependent change of the hydrogen flow rate accompanying the hydrogen filling to a hydrogen storage container. Similarly, it is a schematic diagram showing a change with time of the hydrogen pressure in the container. Similarly, it is a schematic diagram showing the change over time of the weight of the hydrogen storage container. Similarly, it is a schematic diagram showing the change over time of the temperature of the hydrogen storage container. Similarly, it is a schematic diagram showing the change over time of the hydrogen storage container surface strain. It is a block diagram of the system containing the hydrogen filling monitoring apparatus of one Embodiment of this invention. It is a flowchart which shows the hydrogen filling method of one Embodiment of this invention. Similarly, it is a flowchart which shows a part process of the hydrogen filling method. It is a schematic diagram which shows the time-dependent change of the measured physical quantity in the Example of this invention. Similarly, it is the graph which applied the linear approximation formula by the least square method regarding the filling hydrogen flow rate. Similarly, it is the graph which applied the linear approximation formula by the least square method regarding the container surface temperature. Similarly, it is a graph showing the comparison between the remaining time until the actual filling is completed and the remaining time predicted from the filling hydrogen flow rate and the container surface temperature.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hydrogen cylinder 2 Hydrogen supply pipe 3 Hydrogen storage container 4 Cooling jacket 10 Flowmeter 11 Electromagnetic on-off valve 12 Electromagnetic on-off valve 13 Thermometer 14 Indicator 15 Buzzer 20 Control part 21 Timer 22 Storage part

Claims (14)

  When filling the hydrogen storage container with hydrogen, a predetermined physical quantity that changes according to the progress of filling of the hydrogen is measured every predetermined time, and the time change of the physical quantity is fitted to an approximate expression to predict the completion time of filling of the hydrogen A method for filling hydrogen into a hydrogen storage container, characterized in that   2. The method of filling hydrogen into a hydrogen storage container according to claim 1, wherein the calculation of the estimated time for filling completion is obtained from the approximate expression based on the physical quantity indicated when filling is completed.   During the measurement, the approximate expression is corrected in a timely manner based on the change in the physical quantity, and an estimated time until completion of the hydrogen filling is calculated again based on the corrected approximate expression. 3. A method for filling hydrogen into a hydrogen storage container according to 1 or 2.   The physical quantity is any one of a filling hydrogen flow rate, a hydrogen pressure, a hydrogen storage container weight, a hydrogen storage container temperature, a cooling medium temperature, a hydrogen storage container surface distortion, and a supply-side hydrogen remaining amount. The method for filling hydrogen into the hydrogen storage container according to any one of the above.   The method for filling hydrogen into a hydrogen storage container according to any one of claims 1 to 4, wherein it is determined whether or not the calculated filling completion time is abnormal.   6. The method of filling hydrogen into a hydrogen storage container according to claim 5, wherein when the calculated completion time of filling is determined to be abnormal, control at the time of abnormality is performed.   The method for filling hydrogen into a hydrogen storage container according to claim 6, wherein the control at the time of abnormality is notification notifying abnormality.   The method for filling hydrogen into a hydrogen storage container according to claim 6 or 7, wherein the abnormality control automatically stops the hydrogen filling process.   Measuring means for measuring a predetermined physical quantity that changes according to the progress of filling of hydrogen into the hydrogen storage container every predetermined time, and an approximate expression for fitting the time change of the physical quantity obtained by the measuring means to an approximate expression A hydrogen filling monitoring apparatus comprising: a calculating means; and a remaining time calculating means for calculating a remaining time until completion of filling based on the approximate expression.   The hydrogen filling monitoring apparatus according to claim 9, further comprising a notification unit that notifies the remaining time calculated by the remaining time calculation unit.   11. The hydrogen filling monitoring apparatus according to claim 9, further comprising: a remaining time abnormality determining unit that determines whether or not the remaining time calculated by the remaining time calculating unit is abnormal.   The hydrogen filling monitoring device according to any one of claims 9 to 11, further comprising an abnormality control unit that performs an abnormality operation when an abnormality determination is made by the abnormality determination unit.   The hydrogen filling monitoring apparatus according to claim 12, wherein the operation at the time of abnormality is an operation of notifying that the operation is abnormal.   The hydrogen filling monitoring device according to claim 12 or 13, wherein the abnormal operation is an operation of automatically stopping the hydrogen filling process.

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