Glass sealing alloy electric connecting piece and device with glass sealing alloy electric connecting piece

Abstract

The utility model belongs to the technical field of high-airtightness glass sealing alloy piece design, and particularly relates to a glass sealing alloy electric connecting piece and a device with the glass sealing alloy electric connecting piece. According to the utility model, the cross embossing network is arranged on the peripheral side wall of the columnar connecting piece main body, and micro pores, shrinkage porosity and straight crack defects penetrating through the surface in a material are closed through multidirectional extrusion deformation, so that an axial permeation channel is blocked, and the air tightness is obviously improved; and the embossed network is more beneficial to the adhesive force with a glass sintering material and the bonding strength after sintering. The knurling network can be directly formed by adopting a material cutting and thread rolling integrated machine or formed by adopting a precision stamping and knurling process, a special die is not needed, procedures such as secondary cutting, grinding and polishing are not needed, waste materials are not generated, the manufacturing cost and complexity are reduced, and the production efficiency is improved. The sealing connector is suitable for sealing connection requirements in high-pressure, high-temperature and corrosive environments such as air conditioner compressors, new energy batteries and semiconductor packaging.

Description

Technical Field

[0001] This utility model belongs to the field of high airtightness glass-sealed alloy component design technology, specifically relating to a glass-sealed alloy electrical connector and a device having a glass-sealed alloy electrical connector. Background Technology

[0002] In modern industry, glass-sealed alloy electrical connectors, as core components for achieving sealing at the glass-metal interface, are widely used in demanding applications such as air conditioning compressors, semiconductor packaging, and new energy batteries, where high airtightness, high temperature resistance, and corrosion resistance are required. Their core function is to form a dense physical barrier through high-temperature sealing between the glass and metal, preventing the penetration of media such as Freon and electrolytes. Furthermore, by precisely matching the thermal expansion coefficients of the materials, they maintain the stability of the sealing structure with the glass.

[0003] Currently, glass-sealing alloys such as SS446 still have some inherent defects. In the material preparation stage, the vacuum melting process, limited by the flow characteristics of the molten metal, makes it difficult to completely eliminate micropores and intergranular shrinkage defects in the alloy matrix. The measured porosity is typically maintained at 0.05-0.10%, forming microscopic channels for medium permeation. In the processing and manufacturing stage, stress concentration at grain boundaries generated by processes such as material cutting, straightening, and grinding easily induces subsurface microcracks. During the sealing and cooling process, the interfacial shear stress generated by the asynchronous cooling and contraction of the glass and metal further exacerbates the propagation of microcracks at the sealing interface. These systemic defects lead to a theoretical limit to the material's permeation barrier performance. For example, in high-pressure differential applications such as compressors, Freon molecules can still permeate and leak through straight-line through-cracks on the material surface, as well as large-area, long-length depressions.

[0004] To address the issue of media leakage caused by defects in glass-sealing alloy materials, existing solutions employ a compression treatment method from both ends towards the center. For example... Figure 1 As shown, an extrusion die is used to apply extrusion pressure from both ends towards the center, causing controlled plastic deformation in the middle section of the material, altering the material's metallic flow lines, and forming a shape like... Figure 2 The laterally protruding bulge structure shown transforms the originally ordered streamlined structure arranged along the axial direction (such as...) Figure 3 As shown in Figure A, it transforms into a curved trajectory that follows the radial bulge of the bulge (as shown in Figure A). Figure 3 (As shown in B). During deformation, the plastic flow of the material twists and squeezes the grain boundary defects to close them, blocking the axial penetration channels of the material.

[0005] However, existing extrusion processes still have significant limitations: First, the process relies on specialized molds and pressure equipment, which require a large footprint, necessitate experienced technicians for operation, and incur high purchase costs. Simultaneously, process parameters (such as extrusion pressure and deformation) are highly sensitive; fluctuations in these parameters can easily lead to localized over-deformation or under-deformation of the material, resulting in a high scrap rate. Furthermore, the bulge structure, once formed, needs to be removed using punching dies, generating 8-20% waste material, and requires secondary coreless grinding, increasing process complexity, reducing production efficiency, and significantly increasing processing costs. Utility Model Content

[0006] In view of the shortcomings of the existing technology, this utility model provides a glass-sealed alloy electrical connector and a device having a glass-sealed alloy electrical connector.

[0007] The glass-sealed alloy electrical connector provided by this utility model includes a columnar connector body made of glass-sealed alloy material; the connector body has a peripheral sidewall, and an embossed network is arranged around the middle of the peripheral sidewall; the embossed network includes at least two sets of extrusion grooves, referred to as the first extrusion groove group and the second extrusion groove group, the first extrusion groove group having a plurality of spaced first extrusion grooves, and the second extrusion groove group having a plurality of spaced second extrusion grooves; the first extrusion groove group and the second extrusion groove group intersect each other, forming an array of extruded grid units on the peripheral sidewall.

[0008] As a further optimization of the glass-sealed alloy electrical connector, the first extrusion grooves in the first extrusion groove group are arranged at equal intervals, the second extrusion grooves in the second extrusion groove group are arranged at equal intervals, the spacing between adjacent first extrusion grooves is equal to the spacing between adjacent second extrusion grooves, and the first extrusion groove group and the second extrusion groove group intersect to form an array of rhomboid extrusion grid units.

[0009] As a further optimization of the glass-sealed alloy electrical connector, the connector body has a circular cross-section with a diameter D0 of 1.8~5.0 mm.

[0010] As a further optimization of the glass-sealed alloy electrical connector, the embossed network occupies a length L1 in the axial direction of the connector, where L1 / D0≥0.85.

[0011] As a further optimization scheme for glass-sealed alloy electrical connectors, the total length of the extruded grooves in the embossed network is L2, and L2 / D0 = 0.90~5.20.

[0012] As a further optimization scheme for glass-sealed alloy electrical connectors, the radial dimension of the extrusion groove in the embossed network is D1, and (D0-D1) / D0 = 4.7%~13.5%.

[0013] As a further optimization of the glass-sealed alloy electrical connector, in each of the extruded grid units, the area enclosed in the surrounding extrusion grooves is an extrusion protrusion; the radial dimension of the extrusion protrusion is D2, (D2-D0) / D0=2.8%~12.0%.

[0014] The second aspect of this utility model is to provide a device with a glass-sealed alloy electrical connector. The device has a sealed housing with a through hole that extends through the inside and outside. The glass-sealed alloy electrical connector is provided in the through hole, and a glass encapsulation body is provided in the gap between the glass-sealed alloy electrical connector and the through hole to seal the gap.

[0015] Furthermore, the device with glass-sealed alloy electrical connectors is a compressor, a solar cell, a new energy vehicle battery, or a semiconductor packaging component.

[0016] Furthermore, the device with glass-sealed alloy electrical connector is a compressor electrical connector, including an electrical connector sealing cover, and a through hole is provided on the end face of the electrical connector sealing cover.

[0017] Beneficial effects

[0018] This invention utilizes a cross-embossed network on the peripheral wall of a glass-sealed alloy electrical connector. Multi-directional extrusion deformation forces the closure of internal micropores, shrinkage cavities, and surface-penetrating straight-line cracks, blocking axial permeation channels and significantly improving airtightness and corrosion resistance. Furthermore, the embossed network enhances adhesion and sintering strength with the glass sintering material. This glass-sealed alloy electrical connector is easily mass-produced at low cost, avoiding the secondary cutting process and coreless grinding required for traditional bulging structures. It generates no waste, reduces processing complexity and scrap rate, and is suitable for sealing applications in harsh environments such as compressors, batteries, and semiconductors. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a process in the prior art that uses extrusion from both ends to the center.

[0020] Figure 2 This is a schematic diagram of a bulge formed after extrusion processing in the prior art.

[0021] Figure 3 Figure 3A shows a schematic diagram comparing the internal streamline structure of materials before and after extrusion in the prior art, and Figure 3B shows a schematic diagram before extrusion.

[0022] Figure 4 This is a schematic diagram of the structure of a glass-sealed alloy electrical connector.

[0023] Figure 5 This is a magnified schematic diagram of a portion of the embossing network.

[0024] Figure 6 and Figure 7 This is a cross-sectional view of a glass-sealed alloy electrical connector.

[0025] Figure 8 and Figure 9 This is a schematic diagram of the main structure of the compressor's electrical connector.

[0026] In the figure, 1 is the main body of the connector; 2 is the embossed network; 3 is the glass encapsulation body; 4 is the electrical connector sealing cover; 21 is the first extrusion groove; 22 is the second extrusion groove; and 23 is the extrusion protrusion. Detailed Implementation

[0027] The present invention is further illustrated by the following embodiments, which are intended to more clearly illustrate the technical solution of the present invention, and should not be construed as a limitation.

[0028] Example 1

[0029] like Figure 4 and Figure 5 The illustrated glass-sealed alloy electrical connector includes a columnar connector body 1 made of glass-sealed alloy material. The connector body 1 has peripheral sidewalls, around which an embossed network 2 is arranged. The embossed network 2 includes at least two sets of extruded grooves, referred to as a first extruded groove group and a second extruded groove group. The first extruded groove group has several spaced-apart first extruded grooves 21, which are distributed linearly or curvedly on the outer peripheral surface of the glass-sealed alloy electrical connector, maintaining intervals between each other. The second extruded groove group also has several spaced-apart second extruded grooves 22, whose distribution direction is not parallel to the first extruded groove group, for example, perpendicularly intersecting or intersecting at a certain angle. Through the intersecting layout of the first and second extruded groove groups, an array of extruded grid units is formed on the peripheral sidewalls. The shapes of the formed extruded grid units include squares, rhomboid parallelograms, triangles, hexagons, etc.

[0030] For each extruded grid cell, it is surrounded by extrusion grooves. In and around the extrusion grooves, such as... Figure 6 and Figure 7As shown, the glass-sealed alloy material is subjected to significant extrusion, resulting in radial shrinkage and circumferential and axial displacement. Simultaneously, the surrounding embossed network 2 applies overall extrusion from the periphery inwards. This forces the original grain boundary defects (such as micropores, shrinkage porosity, or processing microcracks) within the material, as well as surface through-crack defects, to compress, twist, close, or deflect them, blocking the original through-path and significantly improving the axial airtightness and reliability of the glass-sealed alloy electrical connector. The embossed network 2 can be mass-produced using material extrusion processing methods, such as direct forming via a cutting and wire-rolling integrated machine, or precision stamping and knurling processes. It requires no special molds, no secondary cutting, grinding, or polishing processes, generates no waste, reduces equipment investment costs, and lowers the technical requirements for operators. Furthermore, the mesh structure of the embossed network 2 creates multiple points of contact with the glass material during sealing, improving the wettability and contact area of ​​the glass-metal interface, which is beneficial for increasing the adhesion and sintering strength with the glass sintering material, and enhancing the structural stability of the sealing area.

[0031] In some preferred embodiments, the first extrusion grooves 21 in the first extrusion groove group are arranged at equal intervals, and the second extrusion grooves 22 in the second extrusion groove group are arranged at equal intervals. The spacing between adjacent first extrusion grooves 21 is equal to the spacing between adjacent second extrusion grooves 22, and the first and second extrusion groove groups intersect to form an array of rhomboid extrusion grid units. This uniformly distributed extrusion deformation method is beneficial for achieving omnidirectional closure of internal defects in the material and stress dispersion, thereby improving sealing performance.

[0032] In some preferred embodiments, the connector body 1 has a circular cross-section with a diameter D0 of 1.8~5.0 mm. The embossed network 2 occupies a length L1 along the axial direction of the connector, where L1 / D0 ≥ 0.85, more preferably L1 / D0 = 10.0~38.5; the total length of the embossed grooves in the embossed network 2 is L2, where L2 / D0 = 0.90~5.20; the radial dimension of the embossed grooves in the embossed network 2 is D1, where (D0-D1) / D0 = 4.7%~13.5%; within each embossed grid unit, the area enclosed by the embossed grooves is an embossed protrusion 23, with a radial dimension D2, where (D2-D0) / D0 = 2.8%~12.0%.

[0033] In some preferred embodiments, the glass-sealed alloy electrical connector is made of materials selected from SS446, SS446A, SS446B, 4J28, 4J29, 4J33, 4J34, 4J44, 4J46, etc.

[0034] Example 2

[0035] A compressor electrical connector fixed to a compressor housing and a corresponding compressor. The compressor electrical connector body is shown below. Figure 8 and Figure 9 As shown, the device includes an electrical connector sealing cover 4 with a through hole on its end face. Any of the glass-sealed alloy electrical connectors described in Embodiment 1 is installed within the through hole. A glass encapsulation 3 seals the gap between each glass-sealed alloy electrical connector and the through hole (only a portion of the glass encapsulation 3 is shown schematically in the figure). The working environment inside the electrical connector sealing cover 4 contains a high-pressure Freon medium. By inserting a glass-sealed alloy electrical connector into the through hole and filling the annular gap between the glass-sealed alloy electrical connector and the inner wall of the through hole with a glass encapsulation 3, a metal-glass sealing structure is formed. This structure, through the blocking effect of the embossed network 2 on the internal defect channels of the glass-sealed alloy material, combined with the high airtightness of the glass encapsulation 3, effectively resists the penetration of high-pressure Freon inside the compressor while ensuring the connection of internal and external circuits, achieving long-term sealing reliability of the electrical connector interface.

[0036] Example 3

[0037] A solar cell includes a photovoltaic module sealing housing made of aluminum alloy or stainless steel. The sealing housing has a circular through hole that runs through the inside and outside of the corresponding electrode lead end. Any of the glass-sealed alloy electrical connectors in Example 1 is vertically installed in the through hole. A glass encapsulation body 3 made of high-temperature sealing glass is filled in the annular gap between the glass-sealed alloy electrical connector and the inner wall of the through hole. A metal-glass sealing structure is formed by a sealing process at 850~1000℃.

[0038] Example 4

[0039] A new energy vehicle battery includes a battery casing made of aluminum alloy or high-strength steel, with a through-hole (circular or rectangular) corresponding to the electrode lead-out end. A glass-sealed alloy electrical connector as described in Example 1 is installed within the through-hole, with its axial direction aligned with the battery electrode lead-out direction. A high-temperature sealing glass is filled in the annular gap between the glass-sealed alloy electrical connector and the inner wall of the through-hole, and a metal-glass sealing structure is formed through a sealing process at 850-1000℃. This structure, through the blocking effect of the embossed network on the internal defect channels of the glass-sealed alloy material, combined with the high airtightness of the glass encapsulation, forms a barrier against the penetration of electrolyte from inside the battery.

[0040] Example 5

[0041] A semiconductor packaging assembly includes a semiconductor chip carrier made of a ceramic or metal substrate, on which a lead frame connected to chip electrodes is disposed. The output end of the lead frame extends to the sidewall of the semiconductor package housing, and the housing has a circular through-hole corresponding to the lead frame outlet. Any of the glass-sealed alloy electrical connectors described in Example 1 is vertically mounted within the through-hole, with an embossed network distributed axially on its peripheral sidewalls. Sealing glass is filled between the glass-sealed alloy electrical connector and the inner wall of the through-hole, forming a metal-glass seal structure after curing. Utilizing the closing effect of the embossed network on internal material defects, combined with the matching of the thermal expansion coefficients of the glass and the semiconductor packaging material, moisture and harmful media are prevented from penetrating into the chip along grain boundary defects in high-temperature and humid operating environments, ensuring the electrical performance and long lifespan requirements of the semiconductor device.

[0042] The above embodiments are exemplary and are intended to illustrate the technical concept and features of this utility model, so that those skilled in the art can understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A glass-sealed alloy electrical connector, characterized in that: The connector body (1) is a columnar connector made of glass-sealed alloy material. The connector body (1) has a peripheral sidewall, and an embossed network (2) is arranged around the middle of the peripheral sidewall. The embossed network (2) includes at least two sets of extrusion grooves, referred to as the first extrusion groove group and the second extrusion groove group. The first extrusion groove group has a number of first extrusion grooves (21) arranged at intervals, and the second extrusion groove group has a number of second extrusion grooves (22) arranged at intervals. The first extrusion groove group and the second extrusion groove group intersect each other and form an array of extrusion grid units on the peripheral sidewall.

2. The glass-sealed alloy electrical connector according to claim 1, characterized in that: The first extrusion grooves (21) in the first extrusion groove group are arranged at equal intervals, and the second extrusion grooves (22) in the second extrusion groove group are arranged at equal intervals. The distance between adjacent first extrusion grooves (21) is equal to the distance between adjacent second extrusion grooves (22), and the first extrusion groove group and the second extrusion groove group intersect to form an array of rhomboid extrusion grid units.

3. The glass-sealed alloy electrical connector according to claim 1 or 2, characterized in that: The main body (1) of the connector has a circular cross-section with a cross-sectional diameter D0 of 1.8~5.0mm.

4. The glass-sealed alloy electrical connector according to claim 3, characterized in that: The embossed network (2) occupies a length L1 along the axial direction of the connector, where L1 / D0 ≥ 0.

85.

5. The glass-sealed alloy electrical connector according to claim 3, characterized in that: The total length of the embossed grooves in the embossed network (2) is L2, and L2 / D0 = 0.90~5.

20.

6. The glass-sealed alloy electrical connector according to claim 3, characterized in that: The radial dimension of the embossed network (2) at the embossed groove is D1, and (D0-D1) / D0 = 4.7%~13.5%.

7. The glass-sealed alloy electrical connector according to claim 3, characterized in that: Within each of the extrusion grid units, the area enclosed in the extrusion grooves is an extrusion protrusion (23); the radial dimension of the extrusion protrusion (23) is D2, (D2-D0) / D0=2.8%~12.0%.

8. A device with a glass-sealed alloy electrical connector, characterized in that: The device has a sealed housing with a through hole that extends through the inside and outside. A glass-sealed alloy electrical connector as described in any one of claims 1 to 7 is provided in the through hole. A glass encapsulation body (3) is provided in the gap between the glass-sealed alloy electrical connector and the through hole to seal the gap.

9. The device with a glass-sealed alloy electrical connector according to claim 8, characterized in that: The device is a compressor, a solar cell, a new energy vehicle battery, or a semiconductor packaging component.

10. The device with a glass-sealed alloy electrical connector according to claim 8, characterized in that: The device is a compressor electrical connector, including an electrical connector sealing cover (4), and the through hole is provided on the end face of the electrical connector sealing cover (4).

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