Hydrogen storage cylinder welding structure

Abstract

The utility model belongs to the technical field of energy storage equipment, and particularly relates to a hydrogen storage bottle welding structure which comprises a first bottle body and a second bottle body, and the first bottle body and the second bottle body are matched in an inserted mode through oblique openings to form a first flash groove and a second flash groove. The welding surfaces of the first bottle body and the second bottle body are in interference fit and form a welding part through laser welding, and the first flash groove and the second flash groove are respectively communicated with the welding part; the sum of the area of the first flash groove and the area of the second flash groove is larger than the area of the welding part. According to the utility model, a guiding effect is realized in a manner of beveled port plug-in fit, dislocation during installation is avoided, full contact of welding surfaces can be fully maintained through interference fit, so that flash materials during welding flow into the first flash groove and the second flash groove, secondary processing is reduced, the production efficiency of products is improved, and the product quality is improved. And meanwhile, the manual production cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage equipment, and in particular relates to a hydrogen storage bottle welding structure. Background Art

[0002] Hydrogen energy has become an important solution to energy problems due to its wide source, no pollution, and high calorific value. With the development of fuel cell technology, the application of hydrogen energy in vehicles has been further expanded. Hydrogen fuel cell vehicles are considered to be the future development direction, and hydrogen energy and electric energy will dominate future vehicle energy.

[0003] As a key component for storing hydrogen, hydrogen storage bottles are usually made of pure steel, steel liner fiber winding, aluminum liner fiber winding and plastic liner fiber winding. The internal structure usually includes metal hydrogen storage, metal liner annular winding composite hydrogen storage, metal liner annular and longitudinal winding hydrogen storage, spiral winding hydrogen storage and full composite plastic liner hydrogen storage. Therefore, the material and internal structure are crucial for storing sealed hydrogen. The existing hydrogen storage bottle structure processing process is complicated and usually needs to be completed by injection molding.

[0004] For example, the patent document with publication number CN113733450A discloses a welded plastic liner structure and molding process for a high-pressure composite hydrogen storage bottle. The hydrogen storage bottle needs to be processed by injection molding. Since the composite plastic hydrogen storage material has the advantages of light texture, high pressure resistance, and easy to carry, and can also resist the penetration of hydrogen molecules, the composite plastic is limited by the influence of the shape factors of the hydrogen storage bottle during injection molding and cannot be molded in one piece. In addition, the product is prone to shrinkage and deformation after injection molding, which will cause position deviation of the hydrogen storage bottle after welding, and thus there is a risk of leakage.

[0005] In view of this, it is necessary to improve the defects of the prior art to overcome the deficiencies in practical applications. Utility Model Content

[0006] Based on the above-mentioned shortcomings and deficiencies in the prior art, one of the purposes of the present invention is to at least solve one or more of the above-mentioned problems in the prior art. In other words, one of the purposes of the present invention is to provide a hydrogen storage bottle welding structure that meets one or more of the above-mentioned needs.

[0007] In order to achieve the above utility model purpose, the utility model adopts the following technical solutions:

[0008] The utility model provides a hydrogen storage bottle welding structure, comprising a first bottle body and a second bottle body, the first bottle body and the second bottle body are matched by oblique plug-in to form a first overflow groove and a second overflow groove, the welding surface between the first bottle body and the second bottle body is interference fit and a fusion portion is formed by laser welding, the first overflow groove and the second overflow groove are respectively connected to the fusion portion; wherein the sum of the areas of the first overflow groove and the second overflow groove is greater than the area of ​​the fusion portion.

[0009] As a preferred solution, the first bottle body has an oblique inner concave section, and the second bottle body has an oblique outer convex section, and the oblique inner concave section is plug-fitted with the oblique outer convex section.

[0010] As a preferred solution, the oblique inner concave section has a first inclined surface, the oblique outer convex section has a second inclined surface, and the length of the first inclined surface is greater than the length of the second inclined surface.

[0011] As a preferred solution, the first inclined plane and the second inclined plane are arranged in parallel, and the inclination angle is set to 10-30°.

[0012] As a preferred solution, the first inclined surface and the second inclined surface are interference fit, and the interference is set to at least 0.1 mm.

[0013] As a preferred solution, the oblique inner concave section has a first supporting surface, the oblique outer convex section has a second supporting surface, the length of the first supporting surface is greater than the length of the second supporting surface, and the first supporting surface matches the second supporting surface.

[0014] As a preferred solution, two ends of the welding portion are respectively connected to the first overflow groove and the second overflow groove.

[0015] As a preferred solution, the first bottle body is configured as a light-transmitting layer, the second bottle body is configured as a light-absorbing layer, and the infrared transmittance of the light-transmitting layer is greater than 30%.

[0016] As a preferred solution, the material of the first bottle body and the second bottle body includes one or more of ABS, PA, and PC.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The utility model provides a hydrogen storage bottle welding structure, which realizes a guiding function by means of an oblique plug-in fitting mode, avoids misalignment during installation, and can fully maintain full contact of welding surfaces by means of an interference fit.

[0019] The utility model provides a hydrogen storage bottle welding structure. Before welding, the first bottle body and the second bottle body have an interference fit area that allows overflow during welding to flow into the first overflow groove and the second overflow groove. After laser welding, the outer side horizontal heights of the first bottle body and the second bottle body remain consistent. The use of this structure can reduce secondary processing, improve product production efficiency, and reduce labor production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of the overall structure of the hydrogen storage bottle of an embodiment of the utility model;

[0022] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0023] Figure 3 This is a schematic diagram of the connection structure of the first bottle body of the embodiment of the utility model;

[0024] Figure 4 This is a schematic diagram of the connection structure of the second bottle body of the embodiment of the utility model;

[0025] Figure 5 This is a schematic diagram of laser welding of the first bottle body and the second bottle body of the embodiment of the utility model;

[0026] In the figure: 1 first bottle body, 11 oblique inner concave section, 111 first inclined surface, 112 first supporting surface, 2 second bottle body, 21 oblique outer convex section, 211 second inclined surface, 212 second supporting surface, 3 first overflow groove, 4 second overflow groove, 5 welding part. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the embodiments of the present application, the specific implementation methods of the present application will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0028] In the description of the embodiments of the present application, the terms "upper", "lower", "front", "rear", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second", etc. are only used to distinguish in the description and have no special meaning.

[0029] According to some embodiments of the present application, Figures 1 to 5 As shown, a hydrogen storage bottle welding structure is provided, including a first bottle body 1 and a second bottle body 2, the first bottle body 1 and the second bottle body 2 are matched by oblique plug-in to form a first overflow groove 3 and a second overflow groove 4, the welding surface between the first bottle body 1 and the second bottle body 2 is interference fit and a fusion portion 5 is formed by laser welding, the first overflow groove 3 and the second overflow groove 4 are respectively connected to the fusion portion 5; wherein the sum of the areas of the first overflow groove 3 and the second overflow groove 4 is greater than the area of ​​the fusion portion 5.

[0030] In some embodiments of the present application, the first bottle body 1 has an oblique inner concave section 11 , and the second bottle body 2 has an oblique outer convex section 21 , and the oblique inner concave section 11 is plug-fitted with the oblique outer convex section 31 .

[0031] Furthermore, the oblique inner concave section 11 has a first inclined surface 111, and the oblique outer convex section 21 has a second inclined surface 211. The length of the first inclined surface 111 is greater than the length of the second inclined surface 211. Through the cross-sectional coordination between the first inclined surface 111 and the second inclined surface 211, the coordination of the inclined surfaces can ensure that the molten overflow from laser welding flows into the first overflow groove 3 and the second overflow groove 4.

[0032] Furthermore, the first inclined plane 111 and the second inclined plane 211 are arranged in parallel, and the inclination angle is set to 10-30°. Preferably, the inclination angle between the first inclined plane and the second inclined plane can be set to 10°, 20° or 30°, which can be set according to actual needs.

[0033] Furthermore, the first inclined surface 111 and the second inclined surface 211 are interference fit, and the interference is set to at least 0.1 mm, preferably 0.1 mm, and can also be set to 0.15 mm or 0.2 mm, and can be specifically set according to actual needs.

[0034] Furthermore, the oblique inner concave section 11 has a first supporting surface 112, and the oblique outer convex section 21 has a second supporting surface 212. The length of the first supporting surface 112 is greater than the length of the second supporting surface 212. The cross-sectional cooperation between the first supporting surface 112 and the second supporting surface 212 can prevent overflow.

[0035] In some embodiments of the present application, the two ends of the welding portion 5 are respectively connected to the first overflow groove 3 and the second overflow groove 4. During laser welding, the overflow can flow into the first overflow groove 3 and the second overflow groove 4. After welding is completed, the outer horizontal heights of the first bottle body 1 and the second bottle body 2 are kept consistent, without the need for secondary processing, thereby reducing processing costs.

[0036] In some embodiments of the present application, the relationship between the sum S1+S2 of the area S1 of the first overflow groove 3 and the area S2 of the second overflow groove 4 and the area S3 of the welding portion is: S3 / (S1+S2)≤4 / 5, so that the melted overflow can be completely filled with the first overflow groove and the second overflow groove, and the melting effect of laser welding can be guaranteed. The specific range can be set according to actual needs.

[0037] In some embodiments of the present application, the first bottle body 1 is set as a light-transmitting layer, and the second bottle body 2 is set as a light-absorbing layer. The infrared transmittance of the light-transmitting layer is greater than 30%, and the light-absorbing layer is preferably set to black or dark color to ensure the light-absorbing effect during laser welding.

[0038] In some embodiments of the present application, the material of the first bottle body 1 and the second bottle body 2 includes one or more of ABS, PA, and PC, and the first bottle body and the second bottle body are preferably made of the same material.

[0039] like Figure 5 As shown, the laser 6 is performing laser welding on the welding surface between the first bottle body 1 and the second bottle body 2, and the overflow of the first bottle body 1 and the second bottle body 2 after melting flows into the first overflow groove 3 and the second overflow groove 4, and a welding portion 5 is formed at the same time. This structure can make the first bottle body and the second bottle body welded in one step, reduce secondary processing, improve product production efficiency, and reduce production costs.

[0040] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0041] The above description is only a detailed description of the preferred embodiments and principles of the present application. For ordinary technicians in this field, there will be changes in the specific implementation methods based on the ideas provided by the present application, and these changes should also be regarded as the scope of protection of the present application.

Claims

1. A hydrogen storage bottle welding structure, characterized in that: The invention comprises a first bottle body and a second bottle body, wherein the first bottle body and the second bottle body are plugged together by an oblique opening to form a first overflow groove and a second overflow groove, the welding surfaces between the first bottle body and the second bottle body are interference fit and a fusion joint is formed by laser welding, and the first overflow groove and the second overflow groove are respectively connected to the fusion joint; wherein the sum of the areas of the first overflow groove and the second overflow groove is greater than the area of ​​the fusion joint.

2. A hydrogen storage bottle welding structure according to claim 1, characterized in that: The first bottle body has an oblique inner concave section, and the second bottle body has an oblique outer convex section, and the oblique inner concave section is plug-fitted with the oblique outer convex section.

3. A hydrogen storage bottle welding structure according to claim 2, characterized in that: The oblique inner concave section has a first inclined surface, and the oblique outer convex section has a second inclined surface. The length of the first inclined surface is greater than the length of the second inclined surface.

4. A hydrogen storage bottle welding structure according to claim 3, characterized in that: The first inclined plane is arranged in parallel with the second inclined plane, and the inclination angle is set to be 10-30°.

5. A hydrogen storage bottle welding structure according to claim 3, characterized in that: The first inclined surface and the second inclined surface are interference fit, and the interference amount is set to be at least 0.1 mm.

6. A hydrogen storage bottle welding structure according to claim 2, characterized in that: The oblique inner concave section has a first supporting surface, and the oblique outer convex section has a second supporting surface. The length of the first supporting surface is greater than the length of the second supporting surface, and the first supporting surface matches the second supporting surface.

7. A hydrogen storage bottle welding structure according to claim 1, characterized in that: Two ends of the welding portion are respectively connected to the first overflow groove and the second overflow groove.

8. A hydrogen storage bottle welding structure according to claim 1, characterized in that: The first bottle body is configured as a light-transmitting layer, the second bottle body is configured as a light-absorbing layer, and the infrared transmittance of the light-transmitting layer is greater than 30%.

9. A hydrogen storage bottle welding structure according to claim 1, characterized in that: The material of the first bottle body and the second bottle body includes one of ABS, PA, and PC.

Images