Lithium salt feeding and sampling device

Abstract

The utility model belongs to the technical field of lithium battery electrolyte sampling devices, and particularly relates to a lithium salt feeding and sampling device which comprises a salt barrel, a lithium salt switch, a lithium salt butt joint device and a lithium salt conveying pipeline which are sequentially connected in a sealed mode from top to bottom, the lithium salt butt joint device comprises a butt joint barrel, a feeding port is formed in the top of the butt joint barrel, and a discharging port is formed in the bottom of the butt joint barrel; the feed port is communicated with the salt barrel, the discharge port is communicated with the lithium salt conveying pipeline, a quick connection male end is mounted on the side wall of the butt joint barrel, and a material taking device or a nitrogen pipeline is detachably connected to the quick connection male end. When the quick connection male end is connected with a nitrogen pipeline, the lithium salt charging device can serve as an independent lithium salt charging device, when the quick connection male end is connected with a material taking device, the lithium salt charging device can serve as a charging device and can also serve as a closed sampling device, the dual-purpose technical effect is achieved, and the lithium salt charging device is simple in overall structure and convenient to operate.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery electrolyte sampling devices, in particular to a lithium salt feeding sampling device. Background Art

[0002] In recent years, lithium-ion battery products have been extensively researched and developed. As we all know, the core of a lithium battery is the positive electrode, negative electrode, separator, and electrolyte. The most critical and expensive electrolyte material in a lithium battery electrolyte is lithium salt. As a crucial component of lithium-ion batteries, lithium salts not only provide ions for free-flowing and transport ions within the battery, but also form a protective layer on the surface of the electrode materials, largely determining the battery's performance, including capacity, operating temperature, cycle performance, power density, energy density, and safety. Common lithium salts, such as lithium hexafluorophosphate, lithium difluorosulfonyl imide, and lithium bis(trifluoromethylsulfonyl imide), readily react with trace amounts of water to produce the strong acid PF5. PF5 easily reacts with organic solvents in the electrolyte, causing battery performance degradation. Therefore, all lithium salts must be dehydrated and deoxygenated for storage and transportation.

[0003] Based on the above, it can be seen that the quality of lithium salt has a great impact on the performance of lithium batteries. Therefore, during the addition process of lithium salt, it is necessary to take samples at any time to detect its quality. Considering the wide variety of lithium salts, strict sampling requirements, high sampling difficulty and high safety risks, it is urgent to design an easy-to-operate sampling device to achieve closed sampling. Utility Model Content

[0004] In order to solve the problems in the above-mentioned background technology, the present application provides a lithium salt feeding and sampling device, which can perform closed sampling of lithium salt during the lithium salt feeding process. After sampling, the sampling device can be disassembled and transferred at any time, which is convenient and quick to operate.

[0005] This application adopts the following technical solutions:

[0006] A lithium salt feeding and sampling device comprises a salt barrel, a lithium salt switch, a lithium salt docking device and a lithium salt delivery pipeline which are sealed and connected in sequence from top to bottom, wherein:

[0007] The lithium salt docking device includes a docking barrel, which has a feed port on the top and a discharge port on the bottom; the feed port is connected to the salt barrel, and the discharge port is connected to the lithium salt delivery pipeline. A quick-connect male end is installed on the side wall of the docking barrel, and the quick-connect male end can be detachably connected to a material extraction device or a nitrogen pipeline.

[0008] Furthermore, the material taking device includes a material taking tube and quick-connect female ends fixedly connected to both ends of the material taking tube, and any quick-connect female end can be matched and connected with the quick-connect male end.

[0009] Furthermore, clamps are provided at both ends of the feeding tube, and the lithium salt can be sealed in the feeding tube after the clamps are tightened.

[0010] Furthermore, the feeding pipe is also connected to a pressure detection device for detecting the internal pressure of the feeding pipe.

[0011] Furthermore, the material taking tube is a transparent hard PP hose.

[0012] Furthermore, the docking barrel has a funnel-shaped structure, and its inner diameter gradually decreases from top to bottom.

[0013] Furthermore, a first flange is fixed to the lower end of the salt barrel, and a second flange is fixed to the upper end of the lithium salt switch, and the first flange and the second flange are sealed and connected.

[0014] Furthermore, a third flange is fixed to the lower end of the lithium salt switch, a fourth flange is fixed to the feed port of the lithium salt docking device, and the third flange and the fourth flange are sealed and connected.

[0015] Furthermore, a fifth flange is fixed at the discharge port of the lithium salt docking device, a sixth flange is fixed at the upper end of the lithium salt delivery pipeline, and the fifth flange and the sixth flange are sealed and connected.

[0016] Furthermore, the lithium salt delivery pipeline includes a vertical pipeline and an inclined pipeline, the vertical pipeline is connected to the lithium salt docking device, and the inclined pipeline is connected to the lower end of the vertical pipeline.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] (1) The lithium salt feeding and sampling device of the present invention includes a lithium salt docking device, which includes a docking barrel. A quick-connect male end is installed on the side wall of the docking barrel. The quick-connect male end can be detachably connected to a feeding device or a nitrogen pipeline. When the quick-connect male end is connected to the nitrogen pipeline, the present invention can be used as an independent lithium salt feeding device. The nitrogen pipeline is connected through the quick-connect male end of the docking barrel, and nitrogen is introduced to purge the docking barrel and the lithium salt delivery pipeline. Finally, the lithium salt switch is turned on to feed lithium salt. When the quick-connect male end is connected to the feeding device, the present invention can be used as both a feeding device and a closed sampling device, achieving a dual-purpose technical effect. The sampling device is connected to the docking barrel by a detachable connection. After sampling is completed, it can be disassembled at any time and sent to the glove box for testing, thereby avoiding contact between lithium salt and air.

[0019] (2) The sampling device of the present invention includes a feeding tube, quick-connect female ends connected to both ends of the feeding tube, and clamps arranged at intervals on the feeding tube. Before sampling, any quick-connect female end is connected to the vacuum pipe to evacuate the feeding tube. Then, any quick-connect female end is connected to the quick-connect male end on the docking barrel so that solid lithium salt can be drawn into the feeding tube during the feeding process. Finally, the sampling device is disassembled and placed in a glove box, and any clamp is loosened to pour out the lithium salt for testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is the overall structural diagram of the lithium salt feeding and sampling device of the present invention;

[0022] Among them: 1-salt barrel, 2-lithium salt switch, 3-lithium salt docking device, 31-docking barrel, 32-quick connection male end, 4-lithium salt delivery pipeline, 41-vertical pipeline, 42-inclined pipeline, 5-feeding device, 51-feeding pipe, 52-quick connection female end, 53-clamp, 54-pressure detection device, 6-first flange, 7-second flange, 8-third flange, 9-fourth flange, 10-fifth flange, 11-sixth flange. DETAILED DESCRIPTION

[0023] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] The following is combined with Figure 1 And specific embodiments discuss the present invention in detail.

[0025] like Figure 1 As shown, the utility model provides a lithium salt feeding and sampling device, comprising a salt barrel 1, a lithium salt switch 2, a lithium salt docking device 3 and a lithium salt delivery pipeline 4 which are sealed and connected in sequence from top to bottom, wherein:

[0026] The lithium salt docking device 3 includes a docking barrel 31, which has a feed port on the top and a discharge port on the bottom. The feed port is connected to the salt barrel 1, and the discharge port is connected to the lithium salt delivery pipeline 4. A quick-connect male end 32 is installed on the side wall of the docking barrel 31, and a material extraction device 5 or a nitrogen pipeline is detachably connected to the quick-connect male end 32. When the quick-connect male end 32 is connected to the nitrogen pipeline, the present application can be used as an independent lithium salt feeding device; when the quick-connect male end 32 is connected to the material extraction device 5, the present application can be used as a feeding device or as a closed sampling device, achieving a technical effect of dual use. The sampling device 5 is connected to the docking barrel 31 in a detachable manner. After sampling is completed, it can be removed at any time and sent to the glove box for testing, avoiding contact between lithium salt and air.

[0027] Specifically, when the quick-connect male end 32 of the present application is connected to the material-picking device 5, the material-picking device 5 includes a material-picking tube 51 and a quick-connect female end 52 fixedly connected to both ends of the material-picking tube 51. Any quick-connect female end 52 can be matched and connected with the quick-connect male end 32. There will be no situation of reverse or incorrect installation during installation. It can be installed at will, which is convenient and quick.

[0028] Specifically, clamps 53 are provided at both ends of the feed tube 51. The clamps 53 are spaced apart on the feed tube 51. The space within the feed tube 51 between the clamps 53 serves as a storage space for the lithium salt sample. The clamps 53 are located inside the quick-connect female end 52. Once tightened, the clamps 53 seal the lithium salt within the feed tube 51. The sampling device 5 can then be removed and transferred without exposing the lithium salt to air. The sealed connection using the clamps 53 in this application facilitates operation and simplifies the sealing structure.

[0029] Specifically, the feed tube 51 is also connected to a pressure detection device 54 for detecting the internal pressure of the feed tube. Before taking the material, first connect any quick-connect female end 52 of the feed tube 51 to the vacuum pipe to evacuate the feed tube 51. During the vacuuming process, the pressure inside the feed tube 51 is detected by the pressure detection device 54. Once the pressure reaches the required level, connect any quick-connect female end 52 to the quick-connect male end 32 of the docking barrel 31. In this way, lithium salt can be drawn into the feed tube 51 during the lithium salt addition process. Finally, after tightening the clamps 53 on both sides of the feed tube 51, remove it and transfer it to the glove box. Then, loosen any clamp 53 to smoothly pour out the lithium salt for testing.

[0030] Specifically, the material collection tube of the present application is a transparent hard PP hose. The sample lithium salt is received through the hose, and the sampling status can be observed at any time during the material collection process. When the sampling volume reaches the required amount, it can be removed and transferred.

[0031] Specifically, the docking barrel 31 is a funnel-shaped structure, and its inner diameter gradually decreases from top to bottom. The funnel-shaped docking barrel guides the direction of the incoming lithium salt, thereby preventing lithium salt from being left in the docking barrel 31 .

[0032] It can be seen that lithium salt is in solid powder form and does not have uniformity, so the quality of lithium salt in different areas and positions of the same solid material needs to be tested. The lithium salt feeding and sampling device of the present application has a simple structure and can be applied to different types of lithium salts and perform closed sampling and testing at any time.

[0033] Specifically, in this application, a first flange 6 is fixed to the lower end of the salt barrel 1, and a second flange 7 is fixed to the upper end of the lithium salt switch 2. A sealing gasket is provided between the first flange 6 and the second flange 7, and the first flange 6 and the second flange 7 are sealed together by the sealing gasket. A third flange 8 is fixed to the lower end of the lithium salt switch 2, and a fourth flange 9 is fixed to the feed port of the lithium salt docking device 3. A sealing gasket is provided between the third flange 8 and the fourth flange 9, and the third flange 8 and the fourth flange 9 are sealed together by the sealing gasket. A fifth flange 10 is fixed to the discharge port of the lithium salt docking device 3, and a sixth flange 11 is fixed to the upper end of the lithium salt delivery pipe 4. A sealing gasket is provided between the fifth flange 10 and the sixth flange 11, and the fifth flange 10 and the sixth flange 11 are sealed together by the sealing gasket. This application uses six flanges to connect the salt barrel 1, the lithium salt switch 2, the lithium salt docking device 3, and the lithium salt delivery pipe 4, making them easier to clean and suitable for adding and sampling different types of lithium salts.

[0034] Specifically, the lithium salt delivery pipeline 4 in the present application includes a vertical pipeline 41 and an inclined pipeline 42. The vertical pipeline 41 is connected to the lithium salt docking device 3, and the inclined pipeline 42 is connected to the lower end of the vertical pipeline 41. The inclined pipeline 42 guides the addition of lithium salt, so that the lithium salt is added at a suitable speed. Of course, the lithium salt delivery pipeline 4 in the present application can have only one vertical pipeline 41, and smooth addition can be achieved by selecting a suitable inner diameter, which all fall within the scope of protection of the present application.

[0035] The working principle of this utility model is as follows:

[0036] When the present application is used as an independent lithium salt feeding device, the salt barrel 1, the lithium salt switch 2, the lithium salt docking device 3 and the lithium salt delivery pipeline 4 are first connected as one through six flanges, and then the nitrogen pipeline is connected through the quick connection male end 32 on the docking barrel 31, the lithium salt docking device 3 and the lithium salt delivery pipeline 4 are purged with nitrogen, and finally the lithium salt switch 2 is opened to add lithium salt.

[0037] When the present application is used as a sampling device, before taking the material, first connect any one of the quick-connect female ends 52 of the material taking device 5 to the vacuum pipe to evacuate the material taking tube 51. Then, connect any one of the quick-connect female ends 52 to the quick-connect male end 32 on the docking barrel 31. In this way, the lithium salt can be extracted into the material taking tube 51 during the lithium salt addition process. Finally, after tightening the clamps 53 on both sides of the material taking tube 51, remove it and transfer it to the glove box, and loosen any one of the clamps 53 to smoothly pour out the lithium salt for testing.

[0038] The above further describes the present invention with the help of specific embodiments, but it should be understood that the specific description here should not be construed as limiting the essence and scope of the present invention. Various modifications made to the above embodiments by ordinary technicians in this field after reading this specification are all within the scope of protection of the present invention.

Claims

1. A lithium salt feeding and sampling device, characterized in that: It includes a salt barrel, a lithium salt switch, a lithium salt docking device and a lithium salt delivery pipeline which are sealed and connected in sequence from top to bottom, wherein: The lithium salt docking device includes a docking barrel, a feed port is provided on the top of the docking barrel, and a discharge port is provided on the bottom; the feed port is connected to the salt barrel, and the discharge port is connected to the lithium salt delivery pipeline. A quick-connect male end is installed on the side wall of the docking barrel, and the quick-connect male end can be detachably connected to a material extraction device or a nitrogen pipeline; The material taking device includes a material taking pipe and quick-connect female ends fixedly connected to both ends of the material taking pipe, and any of the quick-connect female ends can be matched and connected with the quick-connect male end; The two ends of the material taking tube are also provided with clamps, and the lithium salt can be sealed in the material taking tube after the clamps are tightened.

2. The lithium salt feeding and sampling device according to claim 1, characterized in that: The material taking pipe is also connected to a pressure detection device for detecting the internal pressure of the material taking pipe.

3. The lithium salt feeding and sampling device according to claim 1, characterized in that: The material taking tube is a transparent hard PP hose.

4. The lithium salt feeding and sampling device according to claim 1, characterized in that: The docking barrel is a funnel-shaped structure, and its inner diameter gradually decreases from top to bottom.

5. The lithium salt feeding and sampling device according to claim 1, characterized in that: A first flange is fixed to the lower end of the salt barrel, and a second flange is fixed to the upper end of the lithium salt switch. The first flange and the second flange are sealed.

6. The lithium salt feeding and sampling device according to claim 1, characterized in that: A third flange is fixed to the lower end of the lithium salt switch, a fourth flange is fixed to the feed port of the lithium salt docking device, and the third flange and the fourth flange are sealed and connected.

7. The lithium salt feeding and sampling device according to claim 1, characterized in that: A fifth flange is fixed at the discharge port of the lithium salt docking device, a sixth flange is fixed at the upper end of the lithium salt delivery pipeline, and the fifth flange and the sixth flange are sealed and connected.

8. The lithium salt feeding and sampling device according to claim 1, characterized in that: The lithium salt delivery pipeline includes a vertical pipeline and an inclined pipeline. The vertical pipeline is connected to the lithium salt docking device, and the inclined pipeline is connected to the lower end of the vertical pipeline.

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