Alloy disc for filling hydrogen storage alloy powder and hydrogen storage tank comprising alloy disc

Abstract

The utility model provides an alloy disc for filling hydrogen storage alloy powder and a hydrogen storage tank comprising the alloy disc, and relates to the field of hydrogen energy storage. The alloy disc comprises a body, a connecting column and a plurality of heat conducting plates, a semi-open filling space is formed in the body, the connecting column is arranged in the center of the body, and the heat conducting plates surround the connecting column at intervals and are arranged in the filling space so as to divide the filling space into a plurality of first division spaces. According to the utility model, coarse and fine particles of the hydrogen storage alloy are uniformly matched in the alloy disc, and the stress-strain consistency of the tank body is improved, so that the problem of flowing of fine powder of the hydrogen storage alloy is solved, and the cycle life is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of hydrogen energy storage, in particular to an alloy disk for loading hydrogen storage alloy powder and a hydrogen storage tank comprising the same. Background Art

[0002] Early high-pressure gas-phase hydrogen storage and liquid hydrogen storage both have disadvantages such as low hydrogen storage capacity and easy explosion. Therefore, it is urgent to further improve the use safety of hydrogen energy and the problem of high hydrogen storage efficiency. The solid-state hydrogen storage method can well balance the deficiencies of gas and liquid hydrogen storage. Solid-state hydrogen storage has the advantages of large hydrogen storage capacity and good safety performance, and high-purity hydrogen can be obtained. The alloy hydrogen storage tank provides hydrogen fuel for the FC / AIP system and can produce high-purity hydrogen fuel for use. It can provide hydrogen for the fuel cell when heated to meet the hydrogen source demand. As a hydrogen storage material, solid powder (TiFe alloy powder) has a large hydrogen storage capacity, high purity (99.99%), fast hydrogen activation, and high utilization rate. The hydrogen pressure used in the hydrogen storage alloy tank is much lower than that of gaseous and liquid hydrogen storage tanks, and it is safe and environmentally friendly. After the hydrogen is consumed during use, it can be easily re-absorbed. Using hydrogen storage alloy to store hydrogen not only has the characteristics of large hydrogen storage capacity, low energy consumption, low working pressure, and convenient use, but also can eliminate the huge steel containers, making storage and transportation safer.

[0003] The TiFe alloy powder needs to be activated by circulating cold and hot water in the tank body, and the hydrogen storage capacity of the TiFe alloy powder is activated by continuous hydrogen charging and discharging to make the alloy powder reach the maximum hydrogen storage capacity. The process of hydrogen charging and discharging is a cyclic endothermic and exothermic process. Therefore, the uniformity of the density of the TiFe alloy powder in the tank body is the key technology. Due to inappropriate pre-loading parameters, the expansion coefficient of the alloy powder in some parts is large during the activation process, causing local deformation of the tank body, even cracking and hydrogen leakage, reducing the service life of the hydrogen storage tank, and at the same time there are major safety hazards.

[0004] Therefore, it is urgent to develop an alloy disk for loading hydrogen storage alloy powder and a hydrogen storage tank comprising the same. Summary of the Utility Model

[0005] To solve the problems existing in the above-mentioned prior art, in the first aspect, the utility model provides an alloy disk for loading hydrogen storage alloy powder, comprising:

[0006] A body, in which a semi-open loading space is formed;

[0007] A connecting column, arranged at the center of the body;

[0008] A plurality of heat conduction plates, arranged around the connecting column at intervals in the loading space to divide the loading space into a plurality of first divided spaces.

[0009] Preferably, the above-mentioned body includes:

[0010] A bottom plate;

[0011] Side plates, which are arranged around the outer edge of the bottom plate to form a loading space.

[0012] Preferably, the above-mentioned heat conducting plate is arranged on the bottom plate, one end of which is connected to the connecting column and the other end is connected to the side plate.

[0013] Preferably, a ventilation hole is opened at the center of the above-mentioned bottom plate, and the connecting column is installed on the ventilation hole.

[0014] Preferably, the above-mentioned connecting column is a hollow column and is communicated with the ventilation hole.

[0015] Preferably, the above-mentioned alloy disc further includes:

[0016] A plurality of partition rings, which are arranged on the bottom plate around the connecting column, and the heat conducting plate passes through the partition rings to divide the first divided space into a plurality of second divided spaces.

[0017] Preferably, the number of the above-mentioned partition rings is 2.

[0018] Preferably, the above-mentioned side plate includes:

[0019] An inner ring, which is installed on the bottom plate;

[0020] An outer ring, which surrounds the inner ring and is installed on the bottom plate;

[0021] At least one buffer layer, which is arranged between the inner ring and the outer ring.

[0022] Preferably, the above-mentioned alloy disc further includes:

[0023] A plurality of lifting lugs, which are arranged on the side plate at intervals.

[0024] In a second aspect, the present invention provides a hydrogen storage tank, which includes: a tank body and a plurality of alloy discs as described in the first aspect, and the plurality of alloy discs are stacked in the tank body.

[0025] The beneficial effects of the present invention are as follows: it ensures that the thick and fine particles of the hydrogen storage alloy are evenly matched in the alloy disc, improves the consistency of the stress and strain of the tank body, thereby solving the problem of the flow of fine powder of the hydrogen storage alloy and improving the cycle life. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0027] Figure 1 Schematic diagram of an alloy disk;

[0028] Figure 2 Schematic diagram of another angle of the alloy disk;

[0029] Figure 3 is Figure 2 partial enlarged view of;

[0030] Figure 4 Schematic diagram of the interior of a hydrogen storage tank;

[0031] Figure 5 Stratified CT image of a hydrogen storage tank filled and mixed using the existing process;

[0032] Figure 6 Stratified CT image of the hydrogen storage tank of the present utility model.

[0033] Among them, the reference numerals are:

[0034] Connecting column 1; heat conducting plate 2; bottom plate 3; side plate 4; ventilation hole 5; lifting lug 6;

[0035] Inner ring 7; outer ring 8; buffer layer 9; partition ring 10; hydrogen storage tank 11; alloy disk 12. Specific embodiments

[0036] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0037] The illustrative embodiments of the present utility model and their descriptions are used to explain the present utility model, but not to limit the present utility model. In addition, elements / components using the same or similar reference numerals in the drawings and embodiments are used to represent the same or similar parts.

[0038] Regarding the "first", "second", "S1", "S2",... used in this article, etc., they do not particularly refer to the meaning of order or sequence, nor are they used to limit the present utility model. They are only used to distinguish elements or operations described with the same technical terms.

[0039] Regarding the directional terms used in this article, such as: up, down, left, right, front or back, etc., they are only references to the directions in the drawings. Therefore, the directional terms used are for explanation and not for limiting this creation.

[0040] As used herein, terms such as "comprising", "including", "having", "containing", etc. are all open-ended terms, meaning including but not limited to.

[0041] As used herein, "and / or" includes any or all combinations of the recited things.

[0042] As used herein, "a plurality of" includes "two" and "more than two"; "a plurality of groups" includes "two groups" and "more than two groups".

[0043] Certain terms used to describe this application will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art regarding the description of this application.

[0044] Please refer to Figures 1 to 6 , Figure 1 which is a schematic diagram of an alloy disk; Figure 2 which is a schematic diagram of the alloy disk from another angle; Figure 3 is Figure 2 a partial enlarged view of; Figure 4 a schematic diagram of the interior of a hydrogen storage tank; Figure 5 is a layered CT image of a hydrogen storage tank filled and mixed using an existing process; Figure 6 is a layered CT image of the hydrogen storage tank of the present utility model. As Figures 1 to 4 shown, in a first aspect, the present utility model provides an alloy disk for loading hydrogen storage alloy powder, comprising: a body, a connecting column, and a plurality of heat conducting plates. A semi-open loading space is formed inside the body. The connecting column is arranged at the center of the body. The plurality of heat conducting plates are arranged at intervals around the connecting column in the loading space to divide the loading space into a plurality of first divided spaces.

[0045] Further, please refer to Figures 1 to 6 again, the above-mentioned body comprises: a bottom plate and a side plate. The side plate is arranged around the outer edge of the bottom plate to form the loading space.

[0046] Wherein, the heat conducting plate is arranged on the bottom plate, one end of which is connected to the connecting column and the other end is connected to the side plate.

[0047] Wherein, a ventilation hole is formed at the center of the bottom plate, and the connecting column is installed on the ventilation hole.

[0048] Wherein, the connecting column is a hollow column and is communicated with the ventilation hole.

[0049] Wherein, the alloy disk further comprises: a plurality of lifting lugs, which are arranged at intervals on the side plate.

[0050] Further, please refer to Figures 1 to 4, the above alloy disk further includes: a plurality of partition rings, the partition rings are arranged on the bottom plate around the connecting column, and the heat conducting plate passes through the partition rings to divide the first divided space into a plurality of second divided spaces.

[0051] Among them, the number of partition rings is 2.

[0052] Further, please refer to Figures 1 to 4 , the above side plate includes: an inner ring, an outer ring and at least one buffer layer, the inner ring is installed on the bottom plate, the outer ring is installed on the bottom plate around the inner ring, and the buffer layer is arranged between the inner ring and the outer ring.

[0053] In a second aspect, the present invention provides a hydrogen storage tank, including: a tank body and a plurality of alloy disks as described in the first aspect, and the plurality of alloy disks are stacked and arranged in the tank body.

[0054] Specifically, in a certain embodiment of the present invention, the radius of the alloy disk is 530 mm, two partition rings are sequentially arranged on the bottom plate, and the distances from the two partition rings to the center of the alloy disk are 240 mm and 380 mm respectively. The height of the side plate is 45 mm. A heat conducting plate is arranged on the bottom plate around the connecting column every 10°, and the number of heat conducting plates is 36, dividing the interior of the alloy disk into 108 second divided spaces. The weight of the alloy powder that can be filled in the alloy disk is about 50 kg.

[0055] The alloy powder is divided into two particle sizes, one is coarse particles (6 - 50 mesh), and the other is fine particles (50 - 100 mesh). First, 25 kg of coarse particles and 25 kg of fine particles are selected and placed in a container and mixed evenly. The 50 kg of mixed powder is filled in ten times, 5 kg each time. First, a to-be-filled alloy disk is placed on a vibration platform, and then 5 kg of the mixed powder is sequentially put into 108 second divided spaces to ensure that the height of the mixed powder in each second divided space is basically the same, and then vibration is carried out to compact the alloy powder. Repeat the above filling process until filling is completed, and it is appropriate that the height of the powder is flush with the bottom of the filling port. After one alloy disk is filled, it is taken off the vibration platform and reserved for use, and continue to fill the next alloy disk. Finally, the filled alloy disks are hoisted into the hydrogen storage tank in sequence, and the tank body is sealed. Sealant is applied to the sealing port, and a sealing gasket and a sealing cover are sequentially placed at the filling port of the tank body and fixed with bolts. The specific vibration parameters are shown in Table 1:

[0056]

[0057]

[0058] Table 1

[0059] Compare the uniformity of the alloy powder of the hydrogen storage tank of the present invention with that of the hydrogen storage tank filled by the existing process:

[0060] (1) Existing process. The tank body is erected on the vibrating table under the canning platform. The alloy powder is matched in terms of thickness. The alloy powder is vibrated once every 50 Kg loaded with an inclined funnel, and the rotation is repeated until the given amount is loaded. Slicing is carried out every 200 mm in the axial direction of the hydrogen storage tank. By verifying that the color difference of each layer of slices is smaller and smaller under the same gray scale, it is proved that the tap density of the alloy powder is relatively uniform; or by comparing the magnitude difference of CT values, the smaller the difference of CT values, the more uniform the powder loading. Observation by slicing from the bottom to the mouth shows that the tap density at the bottom is large, the color is darker, and the CT value difference is relatively large. After 800 mm, the gray scale and CT value are basically the same, as Figure 5 shown. It is also verified that the tap density at the bottom is large, and bulging occurs during repeated hydrogen charging and discharging.

[0061] (2) The hydrogen storage tank of the present utility model. Slicing is carried out every 200 mm in the axial direction of the tank body of the hydrogen storage device. By verifying that the color difference of each layer of slices is relatively small and the CT value difference is also small as Figure 6 shown, it is proved that the tap density of each layer of alloy powder is relatively uniform. It is verified that the adopted process measures are effective.

[0062] In summary, the present utility model ensures that the thick and fine particles of the hydrogen storage alloy are evenly matched in the alloy tray, improves the consistency of the stress and strain of the tank body, thereby solving the problem of the flow of fine powder of the hydrogen storage alloy and improving the cycle life.

[0063] Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. An alloy plate for filling hydrogen storage alloy powder, characterized in that: include: A body, wherein a half-open filling space is formed in the body; A connecting column, arranged at the center of the body; A plurality of heat conducting plates are arranged in the filling space around the connecting column at intervals to divide the filling space into a plurality of first divided spaces; Wherein, the main body comprises: Base plate; A side plate, arranged around the outer edge of the bottom plate to form the filling space; Wherein, the alloy plate further comprises: A plurality of partition rings are arranged on the bottom plate around the connecting column, and the heat conducting plate passes through the partition rings to divide the first partition space into a plurality of second partition spaces.

2. The alloy disk according to claim 1, characterized in that The heat conducting plate is arranged on the bottom plate, one end of the heat conducting plate is connected to the connecting column, and the other end of the heat conducting plate is connected to the side plate.

3. The alloy disk according to claim 2, characterized in that A vent hole is provided at the center of the bottom plate, and the connecting column is installed on the vent hole.

4. The alloy disk according to claim 3, characterized in that The connecting column is a hollow column and is communicated with the vent hole.

5. The alloy disk according to claim 4, characterized in that The number of the separation rings is 2.

6. The alloy disk according to claim 5, characterized in that The side panel comprises: An inner ring, mounted on the bottom plate; An outer ring, surrounding the inner ring and mounted on the bottom plate; At least one buffer layer is disposed between the inner ring and the outer ring.

7. The alloy disk according to claim 6, characterized in that The alloy plate further comprises: A plurality of lifting ears are arranged on the side plate at intervals.

8. A hydrogen storage tank, characterized in that: include: Tank; A plurality of alloy discs according to any one of claims 1 to 7, wherein the plurality of alloy discs are stacked and arranged in the tank body.

Images