CN103817445B - A kind of sodium-sulphur battery vacuum laser welding protection lens shield device - Google Patents
A kind of sodium-sulphur battery vacuum laser welding protection lens shield device Download PDFInfo
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- CN103817445B CN103817445B CN201410079396.3A CN201410079396A CN103817445B CN 103817445 B CN103817445 B CN 103817445B CN 201410079396 A CN201410079396 A CN 201410079396A CN 103817445 B CN103817445 B CN 103817445B
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- 238000003466 welding Methods 0.000 title claims abstract description 88
- BNOODXBBXFZASF-UHFFFAOYSA-N [Na].[S] Chemical compound [Na].[S] BNOODXBBXFZASF-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 230000001681 protective effect Effects 0.000 claims abstract description 129
- 238000009434 installation Methods 0.000 claims abstract description 8
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000005304 optical glass Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 2
- 238000004146 energy storage Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 238000007789 sealing Methods 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000004021 metal welding Methods 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 230000008832 photodamage Effects 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 229910003155 β′′-Al2O3 Inorganic materials 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Secondary Cells (AREA)
Abstract
本发明公开了化学储能领域的一种钠硫电池真空激光焊接保护镜片防护装置，安装于真空箱内侧壁的一个安装槽内，该真空激光焊接保护镜片固定在所述安装槽的外端，该钠硫电池真空激光焊接保护镜片防护装置包括固定在所述安装槽内端的一块防激光反射保护挡板，所述防激光反射保护挡板的中心设有中心孔，所述防激光反射保护挡板与所述真空激光焊接保护镜片之间设有防护筒，所述防护筒的第一端部与所述防激光反射保护挡板的中心固定，所述防护筒的第二端部与所述真空激光焊接保护镜片分离，并在所述防护筒的第二端部增加辅助保护镜片。其技术效果是：其能有效延长真空箱的内侧壁上的真空激光焊接保护镜片的使用寿命，从而提高真空激光焊接质量的一致性和可靠性。
The invention discloses a protective device for a sodium-sulfur battery vacuum laser welding protective lens in the field of chemical energy storage, which is installed in a mounting groove on the inner wall of a vacuum box, and the vacuum laser welding protective lens is fixed at the outer end of the mounting groove. The sodium-sulfur battery vacuum laser welding protection lens protection device includes an anti-laser reflection protection baffle fixed at the inner end of the installation groove, the center of the anti-laser reflection protection baffle is provided with a central hole, and the anti-laser reflection protection baffle A protective tube is provided between the plate and the vacuum laser welding protective lens, the first end of the protective tube is fixed to the center of the anti-laser reflection protective baffle, and the second end of the protective tube is fixed to the center of the laser reflection protection baffle. The protective lens is separated by vacuum laser welding, and an auxiliary protective lens is added to the second end of the protective tube. The technical effect is that it can effectively prolong the service life of the vacuum laser welding protective lens on the inner wall of the vacuum box, thereby improving the consistency and reliability of the vacuum laser welding quality.
Description
技术领域technical field
本发明涉及化学储能领域的一种钠硫电池真空激光焊接保护镜片防护装置。The invention relates to a sodium-sulfur battery vacuum laser welding protection lens protection device in the field of chemical energy storage.
背景技术Background technique
钠硫电池是一种以金属钠为负极活性材料，硫磺为正极活性材料，β’’-Al2O3陶瓷管为电解质隔膜的大容量电池。电池工作温度为330～350℃，此时钠和硫磺均为液态，因此，钠硫电池的密封要求较高。真空激光焊接具有输入工件热量低、热变形和热影响区小、焊接后冷却速度快、焊缝组织微细化、焊接致密性高。因此真空激光焊接成为钠硫电池金属与金属焊接密封最优的选择。钠硫电池正极装配需要真空环境，因此，在正极装配完毕后，对钠硫电池外壳进行焊接时须在真空环境下焊接。Sodium-sulfur battery is a large-capacity battery that uses metallic sodium as the negative electrode active material, sulfur as the positive electrode active material, and β’’-Al2O3 ceramic tube as the electrolyte diaphragm. The working temperature of the battery is 330-350°C, at this time, both sodium and sulfur are liquid, so the sealing requirements of the sodium-sulfur battery are relatively high. Vacuum laser welding has the advantages of low heat input to the workpiece, small thermal deformation and heat-affected zone, fast cooling rate after welding, micro-structure of weld seam, and high welding density. Therefore, vacuum laser welding has become the best choice for metal-to-metal welding and sealing of sodium-sulfur batteries. The assembly of the positive electrode of the sodium-sulfur battery requires a vacuum environment. Therefore, after the positive electrode is assembled, the welding of the sodium-sulfur battery casing must be performed in a vacuum environment.
钠硫电池外壳的真空激光焊通常在一个真空箱内进行，为了使激光能焊接到真空箱内电池，真空箱的内侧壁上通常有一块真空激光焊接保护镜片，该真空激光焊接保护镜片是一块高强度且高激光透过率的光学玻璃，玻璃的内外两侧表面镀有激光增透膜，进一步提高激光的透过率。由于在激光焊接过程中会产生等离子体，等离子体对于激光焊接过程具有重大影响，它对入射激光具有吸收、反射、散射作用，对激光束形成屏蔽，降低了入射激光能量的有效利用，导致熔深下降。在高真空环境下，等离子体还会对保护镜片生产影响，导致真空保护镜片寿命大大下降，其使用寿命只有二十来次，真空激光焊接保护镜片的使用次数一旦超过二十次，真空激光焊接保护镜片就会出现烧蚀现象，且激光透过率会大大降低，激光焊接的有效功率逐渐减弱，从而导致钠硫电池的质量无法保证。而该块真空激光焊接保护镜片的价格却高达500元，因此钠硫电池外壳真空激光焊接的成本相当高。The vacuum laser welding of the sodium-sulfur battery casing is usually carried out in a vacuum box. In order to enable the laser to weld to the battery in the vacuum box, there is usually a vacuum laser welding protective lens on the inner wall of the vacuum box. The vacuum laser welding protective lens is a piece of Optical glass with high strength and high laser transmittance. The inner and outer sides of the glass are coated with laser anti-reflection coatings to further improve the laser transmittance. Since plasma is generated during the laser welding process, the plasma has a major impact on the laser welding process. It absorbs, reflects, and scatters the incident laser, forms a shield for the laser beam, reduces the effective use of the incident laser energy, and leads to melting deep drop. In a high-vacuum environment, the plasma will also affect the production of the protective lens, resulting in a significant decrease in the life of the vacuum protective lens. Its service life is only about 20 times. The protective lens will be ablated, and the laser transmittance will be greatly reduced, and the effective power of laser welding will gradually weaken, resulting in the unguaranteed quality of the sodium-sulfur battery. However, the price of the vacuum laser welding protective lens is as high as 500 yuan, so the cost of vacuum laser welding of the sodium-sulfur battery shell is quite high.
发明内容Contents of the invention
本发明的目的是为了克服现有技术的不足，提供一种钠硫电池真空激光焊接保护镜片防护装置，其能有效延长真空箱的内侧壁上真空激光焊接保护镜片的使用寿命，从而提高真空激光焊接质量的一致性和可靠性。The purpose of the present invention is to overcome the deficiencies in the prior art and provide a protective device for the protective lens of vacuum laser welding of sodium-sulfur battery, which can effectively prolong the service life of the protective lens of vacuum laser welding on the inner wall of the vacuum box, thereby improving the efficiency of vacuum laser welding. Consistency and reliability of welding quality.
实现上述目的的一种技术方案是：一种钠硫电池真空激光焊接保护镜片防护装置，安装于真空箱内侧壁的一个安装槽内，该真空激光焊接保护镜片固定在所述安装槽的外端；A technical solution to achieve the above object is: a sodium-sulfur battery vacuum laser welding protective lens protection device installed in a mounting groove on the inner wall of the vacuum box, and the vacuum laser welding protective lens is fixed at the outer end of the mounting groove ;
该钠硫电池真空激光焊接保护镜片防护装置包括固定在所述安装槽内端的一块防激光反射保护挡板，所述防激光反射保护挡板的中心设有中心孔，所述防激光反射保护挡板与所述真空激光焊接保护镜片之间设有防护筒，所述防护筒的第一端部与所述防激光反射保护挡板的中心固定，所述防护筒的第二端部与所述真空激光焊接保护镜片分离，并在所述防护筒的第二端部增加辅助保护镜片。The sodium-sulfur battery vacuum laser welding protection lens protection device includes an anti-laser reflection protection baffle fixed at the inner end of the installation groove, the center of the anti-laser reflection protection baffle is provided with a central hole, and the anti-laser reflection protection baffle is A protective tube is provided between the plate and the vacuum laser welding protective lens, the first end of the protective tube is fixed to the center of the anti-laser reflection protection baffle, the second end of the protective tube is fixed to the The protective lens is separated by vacuum laser welding, and an auxiliary protective lens is added to the second end of the protective tube.
进一步的，所述防护筒通过位于所述安装槽内的防激光反射保护支架固定。Further, the protective tube is fixed by an anti-laser reflection protection bracket located in the installation groove.
进一步的，所述真空激光焊接保护镜片和所述辅助保护镜片都是由防反射光学玻璃制成的，且表面均镀有激光增透膜。Further, both the vacuum laser welding protective lens and the auxiliary protective lens are made of anti-reflection optical glass, and their surfaces are coated with a laser anti-reflection film.
进一步的，所述辅助保护镜片的厚度远小于所述真空激光焊接保护镜片的厚度。Further, the thickness of the auxiliary protective lens is much smaller than the thickness of the vacuum laser welding protective lens.
进一步的，所述观察窗的中心与所述中心孔中心的连线与所述防护筒的中心轴共线。Further, the line connecting the center of the observation window and the center of the central hole is collinear with the central axis of the protective tube.
进一步的，所述防激光反射保护挡板是由陶瓷制成的，Further, the anti-laser reflection protective baffle is made of ceramics,
再进一步的，所述防激光反射保护挡板是粗糙的，以防止焊接过程中弧光反射对辅助保护镜片的损伤。Still further, the anti-laser reflection protection baffle is rough, so as to prevent arc reflection from damaging the auxiliary protection lens during the welding process.
采用了本发明的一种钠硫电池真空激光焊接保护镜片防护装置的技术方案，即在真空箱内侧壁上的真空激光焊接保护镜片与防激光反射保护挡板的之间增加防护筒，防激光反射保护挡板的中心设有中心孔，所述防护筒的第一端部与所述防激光反射保护挡板的中心固定，所述防护筒的第二端部与真空激光焊接保护镜片分离，并通过一块位于防护筒第二端部的辅助保护镜片对真空激光焊接保护镜片进行进一步保护的技术方案。其技术效果是：其能有效延长真空箱的内侧壁上的真空激光焊接保护镜片的使用寿命，从而提高真空激光焊接质量的一致性和可靠性。A technical scheme of the protection device for vacuum laser welding protective lenses of sodium-sulfur batteries is adopted in the present invention, that is, a protective tube is added between the vacuum laser welding protective lenses on the inner wall of the vacuum box and the anti-laser reflection protection baffle to prevent laser The center of the reflective protection baffle is provided with a central hole, the first end of the protective tube is fixed to the center of the anti-laser reflection protective baffle, and the second end of the protective tube is separated from the vacuum laser welding protective lens, And a technical solution for further protecting the vacuum laser welding protective lens through an auxiliary protective lens located at the second end of the protective tube. The technical effect is that it can effectively extend the service life of the vacuum laser welding protective lens on the inner wall of the vacuum box, thereby improving the consistency and reliability of the vacuum laser welding quality.
附图说明Description of drawings
图1为本发明的一种钠硫电池真空激光焊接保护镜片防护装置的侧视示意图。Fig. 1 is a schematic side view of a protective lens protection device for vacuum laser welding of a sodium-sulfur battery according to the present invention.
图2为本发明的一种钠硫电池真空激光焊接保护镜片防护装置的正视示意图。Fig. 2 is a schematic front view of a protective lens protection device for vacuum laser welding of a sodium-sulfur battery according to the present invention.
具体实施方式Detailed ways
请参阅图1和图2，本发明的发明人为了能更好地对本发明的技术方案进行理解，下面通过具体地实施例，并结合附图进行详细地说明：Referring to Fig. 1 and Fig. 2, in order to better understand the technical solution of the present invention, the inventors of the present invention will describe in detail below through specific embodiments in conjunction with the accompanying drawings:
请参阅图1和图2，本实施例中，钠硫电池真空激光焊接保护镜片防护装置安装在真空箱6内侧壁上的一个安装槽61内。Please refer to FIG. 1 and FIG. 2 , in this embodiment, the protective lens protection device for vacuum laser welding of the sodium-sulfur battery is installed in a mounting groove 61 on the inner wall of the vacuum box 6 .
本实施例中，钠硫电池真空激光焊接保护镜片防护装置包括防激光反射保护挡板1，防护筒2、辅助保护镜片3和防激光反射保护支架8。该防护装置为了保护真空激光焊接保护镜片5在真空箱内进行激光焊接过程中由于弧光反射造成对真空激光焊接保护镜片5的损伤。In this embodiment, the protective device for the vacuum laser welding protective lens of the sodium-sulfur battery includes an anti-laser reflection protective baffle 1 , a protective tube 2 , an auxiliary protective lens 3 and an anti-laser reflection protective bracket 8 . The protective device is used to protect the vacuum laser welding protective lens 5 from damage to the vacuum laser welding protective lens 5 due to arc reflection during the laser welding process in the vacuum box.
其中，真空激光焊接保护镜片5通过法兰固定在真空箱6的内侧壁上，即安装槽61的外端，起到真空箱密闭作用。防激光反射保护挡板1固定在安装槽61内端，其中防激光反射保护挡板1的中心设有中心孔11。Wherein, the vacuum laser welding protective lens 5 is fixed on the inner wall of the vacuum box 6 through a flange, that is, the outer end of the installation groove 61, and plays a role of sealing the vacuum box. The anti-laser reflection protective baffle 1 is fixed on the inner end of the installation groove 61 , wherein the center of the anti-laser reflection protective baffle 1 is provided with a central hole 11 .
防护筒2位于防激光反射保护挡板1和真空激光焊接保护镜片5之间。防护筒2的第一端部在防激光反射保护挡板1的中心与防激光反射保护挡板1固定，防护筒2的第二端部与真空激光焊接保护镜片5分离，并在防护筒2的第二端部安装辅助保护镜片3。The protective tube 2 is located between the anti-laser reflection protective baffle 1 and the vacuum laser welding protective lens 5 . The first end of the protective tube 2 is fixed with the anti-laser reflection protective baffle 1 at the center of the anti-laser reflection protective baffle 1, and the second end of the protective tube 2 is separated from the vacuum laser welding protective lens 5, and is placed on the protective tube 2 The second end of the auxiliary protective lens 3 is installed.
这样设计的目的在于：通过在防护筒2的第二端部增加辅助保护镜片3，可以大大提高真空激光焊接保护镜片5的寿命，而将防护筒2的第一端部，即靠近防激光反射保护挡板1一侧的端部与防激光反射保护挡板1的中心固定，并通过防激光反射保护挡板1中心的第一中心孔11，将大大减弱在真空箱内真空激光焊接时的弧光对辅助保护镜片3的损伤，从而对真空激光焊接保护镜片5起到防护作用。The purpose of this design is: by increasing the auxiliary protective lens 3 at the second end of the protective tube 2, the life-span of the vacuum laser welding protective lens 5 can be greatly improved, and the first end of the protective tube 2, that is, close to the anti-laser reflection The end of one side of the protective baffle 1 is fixed to the center of the anti-laser reflection protection baffle 1, and passes through the first center hole 11 in the center of the anti-laser reflection protection baffle 1, which will greatly weaken the laser welding in the vacuum box. The arc light damages the auxiliary protective lens 3 , thereby protecting the vacuum laser welding protective lens 5 .
激光头4发出的激光被打入真空箱6内。真空激光焊接的过程中，若激光发生反射，只能通过防激光反射保护挡板1上的中心孔11到防护筒2内，而大部分的激光已被防激光反射保护挡板1吸收或者漫反射回真空箱6内，钠硫电池外壳7焊接过程中，辅助保护镜片3抵挡了进入防护筒2的激光，通过牺牲自己来对真空激光焊接保护镜片5进行防护，从而也进一步减少了反射到真空激光焊接保护镜片5上的激光。The laser light emitted by the laser head 4 is driven into the vacuum box 6 . In the process of vacuum laser welding, if the laser is reflected, it can only enter the protective tube 2 through the central hole 11 on the anti-laser reflection protection baffle 1, and most of the laser light has been absorbed by the anti-laser reflection protection baffle 1 or diffused Reflected back into the vacuum box 6, during the welding process of the sodium-sulfur battery casing 7, the auxiliary protective lens 3 resists the laser entering the protective tube 2, and protects the vacuum laser welding protective lens 5 by sacrificing itself, thereby further reducing the reflection to the Vacuum laser welding protects the laser on the lens 5.
本发明的一种钠硫电池真空激光焊接保护镜片防护装置可大大提高真空激光焊接保护镜片5的寿命，由于一片真空激光焊接保护镜片5约500元，而一片辅助保护镜片3约25元，实现了通过牺牲辅助保护镜片3来保护真空激光焊接保护镜片5。通过该真空激光焊接保护镜片5，真空激光焊接保护镜片5的寿命大大增加，使用千次以上后，仍未出现异常.而由于使用了防激光反射保护挡板1，吸收漫反射了大部分从钠硫电池外壳7反射的激光，辅助保护镜片3的寿命也可达近百次，真空激光焊接保护镜片5的使用寿命至少延长了50倍以上，因此也降低了成本。将辅助保护镜片3的厚度远小于真空激光焊接保护镜片5的厚度，比如辅助保护镜片3的厚度为真空激光焊接保护镜片5的二分之一，可以进一步降低钠硫电池外壳7真空激光焊接的成本。与此同时，本发明的一种钠硫电池真空激光焊接保护镜片防护装置可有效保证真空激光焊接的可靠性和一致性，同时也为钠硫电池正极的真空焊接提供一个真空环境。A protective device for vacuum laser welding protective lenses for sodium-sulfur batteries of the present invention can greatly improve the lifespan of vacuum laser welding protective lenses 5, because a vacuum laser welding protective lens 5 is about 500 yuan, and an auxiliary protective lens 3 is about 25 yuan, realizing In order to protect the vacuum laser welding protective lens 5 by sacrificing the auxiliary protective lens 3 . Through the vacuum laser welding protective lens 5, the service life of the vacuum laser welding protective lens 5 is greatly increased, and no abnormality occurs after more than a thousand times of use. However, due to the use of the anti-laser reflection protective baffle 1, most of the diffuse reflection from The service life of the auxiliary protective lens 3 for the laser reflected by the sodium-sulfur battery casing 7 can reach nearly a hundred times, and the service life of the vacuum laser welding protective lens 5 is at least 50 times longer, thus reducing the cost. The thickness of the auxiliary protective lens 3 is much smaller than the thickness of the vacuum laser welding protective lens 5. For example, the thickness of the auxiliary protective lens 3 is 1/2 of the vacuum laser welding protective lens 5, which can further reduce the vacuum laser welding of the sodium-sulfur battery case 7. cost. At the same time, the protective lens protection device for vacuum laser welding of sodium-sulfur batteries of the present invention can effectively ensure the reliability and consistency of vacuum laser welding, and also provide a vacuum environment for vacuum welding of the positive electrode of sodium-sulfur batteries.
本实施中，真空激光焊接保护镜片5和辅助保护镜片3都是由光学玻璃制成，且表面均镀有激光增透膜。防激光反射保护挡板1是由陶瓷制成的，表面粗糙，以增强激光的漫反射。In this implementation, both the vacuum laser welding protective lens 5 and the auxiliary protective lens 3 are made of optical glass, and their surfaces are coated with a laser anti-reflection film. The anti-laser reflection protective baffle 1 is made of ceramics with a rough surface to enhance the diffuse reflection of the laser.
同时。防护筒2通过防激光反射保护支架8在安装槽61内固定。at the same time. The protective tube 2 is fixed in the installation groove 61 through the anti-laser reflection protection bracket 8 .
真空激光焊接保护镜片5的中心与中心孔11的中心连线是水平的，为了保证在焊接过程中激光能最有效发射到焊接表面，激光头4与真空激光焊接保护镜片5的中心及中心孔11在同一水平的轴线上。The center of the vacuum laser welding protective lens 5 is horizontal to the center of the central hole 11. In order to ensure that the laser can be most effectively emitted to the welding surface during the welding process, the center of the laser head 4 and the vacuum laser welding protective lens 5 and the center hole 11 on the same horizontal axis.
本实施例中，中心孔11的直径为8mm。In this embodiment, the diameter of the central hole 11 is 8 mm.
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| CN112692429B (en) * | 2020-12-03 | 2022-03-25 | 中国工程物理研究院材料研究所 | High-vacuum, long-time and high-power laser welding light-transmitting glass protection device |
| CN113523619A (en) * | 2021-07-13 | 2021-10-22 | 崔晓晓 | Laser welding jig |
| CN116532888A (en) * | 2023-04-14 | 2023-08-04 | 南通重矿金属新材料有限公司 | Protective equipment for duplex stainless steel welding |
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