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Sealing-in method of metallic titanium and glass terminal post

A metal titanium and glass encapsulation technology, which is applied in the field of metal titanium and titanium alloys and glass sealing, can solve problems such as hidden quality problems, oxidation of the cover shell and central pole, edge defects of glass and cover sealing, etc. To achieve the effect of reliable quality, meeting work requirements and stable performance

Inactive Publication Date: 2009-09-23
西安华泰有色金属实业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the sealing production process of lithium battery battery cover group, the traditional glass-metal sealing method is used, which is generally carried out in a nitrogen-protected atmosphere furnace. Since the operation process is connected to the air, after the sealing operation is completed, the cover plate The oxidation of the shell and the center pole is relatively serious, and subsequent surface pickling treatment is required; in addition, in the traditional sealing process, the mold used in the sintering method is generally a lower fixed structure, and the products produced by this method, the center The pole is easy to deviate from the designed position, and it is easy to produce defects at the edge of the glass and cover sealing, resulting in quality hazards; in addition, the sealing quality of titanium metal glass sealing products produced by traditional technology is not ideal, and the leakage rate can only reach 8.4× 10 -7 ~2.1×10 -7 Pa.m 3 / s, which is far from the performance index of this product, so the traditional process is not suitable for the sealing of rare metal titanium and titanium alloy and glass

Method used

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  • Sealing-in method of metallic titanium and glass terminal post

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] In this example, the size of the sealing hole is Φ6mm, the thickness of the sealing hole is 2mm, and the pole is 4J29 Kovar wire with Φ2mm.

[0018] ①Start the experiment, put the pole 1, graphite mold 2, metal titanium shell 3, glass beads 4 and other parts such as figure 1 As shown in the assembly, fasten the mold;

[0019] ②Put the fastened mold into the vacuum furnace, seal the vacuum furnace, and wash the furnace twice with argon with a purity of 99.99%;

[0020] ③Pull a vacuum in the furnace, the vacuum degree is 6.0×10 -3 Pa;

[0021] ④Fill with argon with a purity of 99.99% to make the pressure in the furnace 0.9 standard atmosphere;

[0022] ⑤ Carry out the heating operation, starting from room temperature at a rate of 300°C / h, after holding at 150°C for 30 minutes, continue heating at a heating rate of 300°C / h, reaching 1020°C for 40 minutes;

[0023] ⑥ Cooling treatment, starting from 1000°C at a rate of 60°C / h, and continuing to cool to 200°C, and then at a rate...

Embodiment 2

[0025] In this example, the size of the sealing hole is Φ6.5mm, the thickness of the sealing hole is 3mm, and the pole is 4J29 Kovar wire of Φ3mm.

[0026] ①Start the experiment, put the pole 1, graphite mold 2, metal titanium shell 3, glass beads 4 and other parts such as figure 1 As shown in the assembly, fasten the mold;

[0027] ②Put the fastened mold into the vacuum furnace, seal the vacuum furnace, and wash the furnace twice with argon with a purity of 99.99%;

[0028] ③Pull a vacuum in the furnace, the vacuum degree is 6.0×10 -3 Pa;

[0029] ④Fill with argon with a purity of 99.99% to make the pressure in the furnace 0.85 standard atmospheres;

[0030] ⑤ Carry out the heating operation, starting from room temperature at a rate of 300°C / h, holding at 160°C for 30 minutes, and continuing to raise the temperature at a heating rate of 300°C / h, reaching 1000°C for 45 minutes;

[0031] ⑥ The temperature is lowered at a rate of 50°C / h, starting from 1000°C, and continuing to lower...

Embodiment 3

[0033] In this example, the size of the sealing hole is Φ6mm, the thickness of the sealing hole is 5mm, and the pole is 4J29 Kovar wire with Φ2mm.

[0034] ① Put the poles into the holes of the upper and lower graphite templates of the graphite mold, add the glass beads and the metal titanium shell into the mold, and fasten the mold;

[0035] ② Put the fastened mold into a vacuum furnace, seal the vacuum furnace, and wash the furnace twice with 99.99% argon;

[0036] ③Pull a vacuum in the furnace, the vacuum degree is 6.0×10 -3 Pa;

[0037] ④Fill in argon with a purity of 99.99% to make the pressure in the furnace 0.87 standard atmospheres;

[0038] ⑤ Carry out the heating operation, starting from room temperature at a rate of 300°C / h, holding at 155°C for 30 minutes, and continuing to raise the temperature at a heating rate of 300°C / h, reaching 1010°C for 42 minutes;

[0039] ⑥ The temperature is lowered at a rate of 55°C / h, starting from 1000°C, the temperature is continuously l...

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Abstract

The invention belongs to the technical field of metal and glass sealing-in, in particular to a sealing-in method of metallic titanium and titanium alloy as well as a glass terminal post, comprising the following steps: firstly, adding the terminal post, a glass ball and a metallic titanium shell into a die and locking the die; secondly, placing the locked die into a vacuum furnace and cleaning the furnace by high-purity argon; thirdly, vacuumizing the inner part of the furnace, wherein the vacuum degree is 6.0*10<-3> Pa; fourthly, inflating the high-purity argon to lead the pressure in the furnace to be 0.85-0.9 normal atmosphere; fifthly, raising the temperature; sixthly, reducing the temperature to the room temperature, and obtaining a metallic titanium and titanium alloy sealing-in assembly. The leak rate of the titanium glass sealing-in assembly can reach the value less than 1*10<-9>Pa.m<3> / s, and the insulation resistance is improved by 1 time compared with the battery terminal post of the prior art. Through the test, the titanium glass sealing-in assembly has stable property and reliable quality, and can fully meet the working requirements of a thermal battery.

Description

[0001] Technical field. [0002] The invention belongs to the technical field of metal and glass sealing, in particular to a process method for sealing metal titanium and titanium alloy and glass. Background technique [0003] In the production process of the sealing of the lithium battery battery cover assembly, the traditional glass-metal sealing method is used, which is generally carried out in a nitrogen-protected atmosphere furnace. Since the operation is open to air, after the sealing operation is completed, the cover plate The oxidation of the shell and the center pole is serious, and subsequent surface pickling treatment is required; in addition, in the traditional sealing process, the mold used in the sintering method is generally a fixed structure. The product produced by this method has a center The pole is easy to deviate from the design position, and it is easy to produce defects on the edge of the glass and the cover sealing, causing hidden quality hazards; in additio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C29/00
Inventor 杨文波冯生冯庆赵红刚任利娜谷滨京赵霖
Owner 西安华泰有色金属实业有限责任公司
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