A solid-state hydrogen storage device filling system

Abstract

The utility model provides a kind of solid-state hydrogen storage device filling system, hydrogen source is purified by front end setting pressure swing adsorption device to improve filling quality, and the efficiency is improved by being used for filling to ensure pressure supply after pressurization;In addition, by helium pipe, nitrogen pipe and hydrogen pipe series connection respectively, pressure test can be carried out before filling, and pipeline purging before and after filling can be realized;By setting refrigerator unit, heat is released in time during filling process, the safety of filling process is improved, and the defects of large filling safety risk and unstable quality in prior art are solved.

Description

Technical Field

[0001] This utility model relates to the field of gas filling technology, specifically to a solid hydrogen storage device filling system. Background Technology

[0002] Amidst the continuously rising global demand for clean energy, hydrogen energy, as an efficient and clean energy carrier, has attracted widespread attention. Solid-state hydrogen storage technology, with its advantages of high hydrogen storage density, good safety, and stability, has become a key direction for the future development of hydrogen storage technology.

[0003] With the continuous development of new hydrogen storage materials, such as new metal hydride solid hydrogen storage materials, which have higher hydrogen storage capacity and faster hydrogen absorption and desorption rates, important support is provided for the promotion and utilization of hydrogen energy.

[0004] However, the existing hydrogen storage device filling process has significant safety risks and unstable quality, which limits the filling operation of hydrogen storage devices. Utility Model Content

[0005] This invention proposes a solid hydrogen storage device filling system, which solves the defects of existing technologies such as high filling safety risks and unstable quality.

[0006] The technical solution of this utility model is implemented as follows: A solid-state hydrogen storage device filling system includes a pressure swing adsorbent, a compressor, and a hydrogen storage device connected in sequence; wherein: The hydrogen storage device has a hydrogen gas pipe at its input end connected to the output end of the compressor; the output end of the hydrogen storage device is connected to a vent pipe. The hydrogen pipe is equipped with valve one and valve two in sequence along the gas inlet direction, and a pressure monitor is installed between valve one and valve two; a helium pipe (L3) is connected between valve one and the pressure monitor, and an analysis pipe is installed between the pressure monitor and valve two; The analysis tube is connected to a hydrogen analyzer and is equipped with valve three; the helium tube is equipped with valve four and valve five; a nitrogen tube is connected between valve four and valve five and is equipped with valve six. The vent pipe is equipped with valve seven and valve eight; a purge analysis pipe is provided between valve seven and valve eight and connected to the input end of valve three; The hydrogen storage device has a jacket, with its ends connected to the medium input and output terminals of the refrigeration unit, respectively.

[0007] Furthermore, at least one of the helium pipe, nitrogen pipe, and vent pipe is equipped with a one-way valve.

[0008] Preferably, the helium pipe is equipped with a one-way valve near the gas source input end; And / or, the nitrogen pipe is equipped with a one-way valve two, near the gas source input end; And / or, the vent pipe is equipped with a one-way valve three near the end of the vent pipe.

[0009] Furthermore, the input end of the valve is also equipped with a pressure reducing valve.

[0010] Furthermore, the pressure monitor is interlocked with the valve.

[0011] The beneficial effects of this utility model are as follows: The solid hydrogen storage device filling system of this utility model improves filling quality by purifying the hydrogen source through a pressure swing adsorption device at the front end, and uses the pressurized hydrogen for filling to ensure pressure supply and improve efficiency. In addition, by connecting helium, nitrogen and hydrogen pipes in series, pressure holding tests can be performed before filling, and pipeline purging can be carried out before and after filling. By setting up a refrigeration unit, heat can be released in time during the filling process, improving the safety of the filling process and solving the defects of existing technology such as high filling safety risk and unstable quality. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall filling system of a solid hydrogen storage device according to the present invention.

[0014] The attached figures are labeled as follows: AC1, Compressor; CR1, Refrigeration Unit; CV1, Check Valve 1; CV2, Check Valve 2; CV3, Check Valve 3; HST1, Hydrogen Storage Unit; K1, Valve 1; K2, Valve 2; K3, Valve 3; K4, Valve 4; K5, Valve 5; K6, Valve 6; K7, Valve 7; K8, Valve 8; L1, Hydrogen Pipe; L2, Analysis Pipe; L3, Helium Pipe; L4, Nitrogen Pipe; L5, Vent Pipe; L6, Purge Analysis Pipe; PI1, Pressure Monitor; PRV1, Pressure Regulator; PSA1, Pressure Swing Adsorption Unit. Detailed Implementation

[0015] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] Reference Figure 1 This embodiment provides a solid hydrogen storage device filling system, including a pressure swing adsorber (PSA1), a compressor (AC1), and a hydrogen storage device (HST1) connected in sequence; wherein: the input end of the hydrogen storage device (HST1) is provided with a hydrogen pipe (L1) connected to the output end of the compressor (AC1); the output end of the hydrogen storage device (HST1) is connected to a vent pipe (L5); The hydrogen pipe L1 is provided with valve K1 and valve K2 in sequence along the gas inlet direction. A pressure monitor PI1 is provided between valve K1 and valve K2. A helium pipe L3 is connected between valve K1 and pressure monitor PI1. An analysis pipe L2 is provided between pressure monitor PI1 and valve K2. The analysis tube L2 is connected to the hydrogen analyzer, and valve K3 is installed on the analysis tube L2; valves K4 and K5 are installed on the helium tube L3; a nitrogen tube L4 is connected between valves K4 and K5, and valve K6 is installed on the nitrogen tube L4. The vent pipe L5 is equipped with valve 7 K7 and valve 8 K8; a purge analysis pipe L6 is provided between valve 7 K7 and valve 8 K8 and connected to the input end of valve 3 K3; The hydrogen storage device HST1 has a jacket, with its ends connected to the medium input and output terminals of the refrigeration unit CR1, respectively.

[0017] The following uses a hydrogen storage fuel cell as an example. The working process of the filling system described in the above embodiment is as follows: 1) The pressure swing adsorber (PSA1) is used to purify the hydrogen source to a higher purity. After being pressurized by the compressor AC1, it ensures the pressure required for subsequent filling. Before filling, keep all other valves closed, open valve one (K1) and valve three (K3) to allow hydrogen to enter the analysis tube L2. After the hydrogen purity is analyzed by the hydrogen analyzer and found to be qualified, close all valves.

[0018] 2) Before filling, after connecting the hydrogen storage fuel cell as a hydrogen storage device, keep other valves closed, open valve 2K2, valve 4K4 and valve 5K5, fill the hydrogen storage fuel cell with helium and observe the pressure monitor PI1 to conduct a pressure holding test. If the pressure monitor PI1 remains unchanged after filling for a certain period of time, it means that the pressure is maintained well.

[0019] 3) After the pressure holding test is completed, close valves 4 (K4) and 5 (K5), and open valves 1 (K1), 2 (K2), and 7 (K7). Repeatedly purge and replace the hydrogen storage device through hydrogen pipe L1 and vent pipe L5. Open valve 3 (K3), and the gas in the hydrogen storage device enters the hydrogen analyzer through the purge analysis pipe L6. If the purity is consistent with the previous analysis, it means that the purging is complete.

[0020] 4) After purging, close valves K3, K7, and K8, while keeping valves K1 and K2 open to fill the hydrogen storage fuel cell with hydrogen. Since the hydrogen storage fuel cell has its own cooling jacket, connect the start-up refrigeration unit CR1 at this time for cooling, which can control the temperature at 10-15℃. When filling is complete, the pressure monitor PI1 remains unchanged. At this point, close all valves to complete the filling process.

[0021] 5) After filling, open valves K2 and K5 to K8, open nitrogen pipe L4 and vent pipe L5, and use the venting system built into the hydrogen storage battery to vent and purge the residual hydrogen. Open valve K3 until the hydrogen content is detected to be lower than the safe value, then close all valves and remove the hydrogen storage fuel cell.

[0022] In the above embodiments, the solid hydrogen storage device filling system uses a pressure swing adsorption device at the front end to purify the hydrogen source and improve the filling quality. After pressurization, the hydrogen is used for filling to ensure pressure supply and improve efficiency. In addition, by connecting helium, nitrogen and hydrogen pipes in series, pressure holding tests can be performed before filling and pipeline purging can be performed after filling. By setting pressure monitoring elements and refrigeration units, pressure monitoring and timely heat release during the filling process can be achieved, improving the safety of the filling process and solving the defects of high filling safety risk and unstable quality in the prior art.

[0023] In a preferred embodiment, the pressure swing adsorber (PSA) can be designed according to the purity of the hydrogen filling. It achieves physical adsorption of gas molecules through a porous solid adsorbent. Utilizing the adsorbent's characteristics of readily adsorbing high-boiling-point components and reluctantly adsorbing low-boiling-point components under the same pressure, and the increased adsorption capacity under high pressure and decreased adsorption capacity under low pressure, the feed gas is passed through the adsorption bed under a certain pressure. High-boiling-point impurities relative to hydrogen are selectively adsorbed, while low-boiling-point hydrogen is not easily adsorbed and passes through the adsorption bed, achieving separation of hydrogen and impurities. If a purity of 99.9995% can be achieved, it can meet the requirements for filling hydrogen storage batteries.

[0024] In a preferred embodiment, to ensure safety, at least one of the helium pipe L3, nitrogen pipe L4, and vent pipe L5 is equipped with a one-way valve. Specifically, the helium pipe L3 is equipped with a first one-way valve CV1 near the gas source input end; the nitrogen pipe L4 is equipped with a second one-way valve CV2 near the gas source input end; and the vent pipe L5 is equipped with a third one-way valve CV3 near the end of the vent pipe L5.

[0025] Furthermore, the input end of the valve K1 is also equipped with a pressure reducing valve PRV1, which is used to control the pressure when the hydrogen pipeline L1 fills the hydrogen storage device HST1. It can be designed according to different filling pressure requirements.

[0026] In a preferred embodiment, the pressure monitor PI1 is interlocked with valve K1, and valve K1 automatically closes when the pressure reaches a threshold.

[0027] It is understood that in the above solid-state hydrogen storage device filling system, all relevant valves can be remotely controlled via PLC. Automated operation can be achieved by setting threshold parameters for each step, requiring manual intervention only when disassembling the bottle. The design to achieve this automation and the addition of relevant components are both within the design concept of this utility model.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A solid-state hydrogen storage device filling system, characterized in that, It includes a pressure swing adsorber (PSA1), a compressor (AC1), and a hydrogen storage unit (HST1) connected in sequence; wherein: The hydrogen storage device (HST1) has a hydrogen pipe (L1) at its input end connected to the output end of the compressor (AC1); the output end of the hydrogen storage device (HST1) is connected to the vent pipe (L5). The hydrogen pipe (L1) is equipped with valve one (K1) and valve two (K2) in sequence along the gas inlet direction. A pressure monitor (PI1) is installed between valve one (K1) and valve two (K2). A helium pipe (L3) is connected between valve one (K1) and pressure monitor (PI1). An analysis pipe (L2) is installed between pressure monitor (PI1) and valve two (K2). The analysis tube (L2) is connected to the hydrogen analyzer, and valve three (K3) is provided on the analysis tube (L2); valve four (K4) and valve five (K5) are provided on the helium tube (L3); a nitrogen tube (L4) is connected between valve four (K4) and valve five (K5), and valve six (K6) is provided on the nitrogen tube (L4). The vent pipe (L5) is equipped with valve seven (K7) and valve eight (K8); a purge analysis pipe (L6) is provided between valve seven (K7) and valve eight (K8) and connected to the input end of valve three (K3); The hydrogen storage device (HST1) has a jacket, with its ends connected to the medium input and output terminals of the refrigeration unit (CR1).

2. The solid-state hydrogen storage device filling system as described in claim 1, characterized in that, At least one of the helium pipe (L3), nitrogen pipe (L4), and vent pipe (L5) is equipped with a one-way valve.

3. The solid-state hydrogen storage device filling system as described in claim 2, characterized in that, The helium pipe (L3) is equipped with a one-way valve (CV1) near the gas source input end; And / or, the nitrogen pipe (L4) is equipped with a one-way valve (CV2) near the gas source input end; And / or, the vent pipe (L5) is provided with a one-way valve three (CV3) near the end of the vent pipe (L5).

4. The solid-state hydrogen storage device filling system as described in claim 1, characterized in that, The valve one (K1) is also equipped with a pressure reducing valve (PRV1) at its input end.

5. The solid-state hydrogen storage device filling system as described in claim 1, characterized in that, The pressure monitor (PI1) is interlocked with valve one (K1).

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