A lithium sulfide preparation device with stirring

Abstract

The utility model discloses a lithium sulfide preparation device with stirring belongs to lithium sulfide powder preparation equipment technical field, include: the smelting furnace, and the smelting furnace includes furnace body and smelting cover, and smelting cover detachable seal connection is in the upper end of furnace body, and drive part is set up in the upper end of smelting cover, and the drive end of drive part extends to the inside of furnace body, and the reactor is placed in the furnace body, and the upper end of reactor is detachable seal connection with reactor seal cover, and stirring part, stirring part is located in the reactor, and the drive end of stirring part extends to the outside of reactor, and with reactor seal cover rotatable seal connection, and the drive end of stirring part is driven and is connected with the drive end of drive part, the utility model discloses can increase stirring work in the lithium sulfur smelting furnace synthesis process, and will lithium sulfur raise, increase lithium sulfur reaction contact time, has promoted production efficiency and product quality, has reduced product hetero-phase and production cost. Product has the even distribution of element and particle size, and the qualified rate is high.

Description

Technical Field

[0001] This utility model belongs to the technical field of lithium sulfide powder preparation equipment, and more specifically relates to a lithium sulfide preparation device with stirring. Background Technology

[0002] In the field of lithium batteries, current liquid lithium batteries lack sufficient energy density and are prone to catching fire and exploding due to their organic electrolyte content. Therefore, higher energy density and greater safety are key development directions for next-generation lithium-ion batteries worldwide. All-solid-state lithium-ion batteries, possessing both advantages, are expected to become a major research focus for next-generation lithium-ion batteries. The core component of all-solid-state lithium-ion batteries is the solid electrolyte. Replacing traditional organic electrolytes with solid electrolytes holds promise for solving the safety issues of lithium batteries. Currently, there are four main categories of solid electrolyte materials: sulfide solid electrolytes, oxide solid electrolytes, halide solid electrolytes, and polymer solid electrolytes. Sulfide solid electrolytes, due to their high conductivity (10⁻⁴ ~ 10⁻² mS / cm), are the most promising among the four categories for application in all-solid-state lithium-ion batteries.

[0003] Lithium sulfide is an important raw material for synthesizing sulfide solid electrolytes. Currently, lithium sulfide is mainly prepared by solid-phase or liquid-phase methods. Solid-phase method has become a commonly used process due to its advantages such as simple process, less material, and low cost. However, due to the sealing of the double-layer reactor and the connection method of the stirrer, the lithium sulfide preparation process does not have a stirring function. Lithium and sulfur elements will settle to the bottom, resulting in incomplete reaction, uneven lithium-sulfur ratio and distribution, more impurities in the product, and a large amount of waste of lithium and sulfur elements, which increases production costs and reduces product qualification rate. Utility Model Content

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A lithium sulfide preparation apparatus with stirring, comprising: A furnace, comprising a furnace body and a melting cover, wherein the melting cover is detachably and sealingly connected to the upper end of the furnace body; A drive unit is disposed at the upper end of the melting cover, and the drive end of the drive unit extends into the interior of the furnace body; A reaction vessel, which is placed inside the furnace, has a detachable and sealable reaction vessel cover at its upper end; The stirring section is located inside the reactor. The driving end of the stirring section extends to the outside of the reactor and is rotatably and sealingly connected to the reactor sealing cover. The driving end of the stirring section is drivenly connected to the driving end of the driving section.

[0005] Furthermore, the melting cover and the furnace body are sealed together by an interlocking rubber ring.

[0006] Furthermore, the reactor and the reactor sealing cover are sealed together by an interlocking rubber ring.

[0007] Furthermore, the drive unit includes a motor mounted on the upper end of the melting cover and a drive shaft located inside the furnace body. The first end of the drive shaft is driven connected to the output shaft of the motor, and the second end is driven connected to the drive end of the stirring unit. The output shaft of the motor is rotatably and sealingly connected to the melting cover.

[0008] Furthermore, the stirring unit includes: A stirring shaft is rotatably and sealingly connected to the reactor sealing cover. The first end of the stirring shaft is located outside the reactor and is drivenly connected to the second end of the drive shaft. The second end of the stirring shaft extends into the reactor. A stirring blade is located inside the reactor and is fixedly connected to the stirring shaft.

[0009] Furthermore, the stirring blades are double helical blades.

[0010] Furthermore, the first end of the stirring shaft is provided with an inner hexagonal groove, and the second end of the drive shaft is provided with an outer hexagonal structure that matches the inner hexagonal groove.

[0011] Furthermore, a hexagonal nut that fits the inner hexagonal groove is fixedly connected to the second end of the drive shaft.

[0012] Furthermore, the reactor is cylindrical with a hemispherical closed bottom and an open top with a baffle extending outward by 20cm-30cm.

[0013] Furthermore, the enclosure is provided with multiple lifting holes in a circumferential array.

[0014] As can be seen from the above technical solution, compared with the prior art, the present invention has the following beneficial effects: The lithium sulfide preparation apparatus with stirring provided by this utility model can increase stirring during the lithium-sulfur furnace synthesis process, raising the lithium-sulfur mixture, increasing the lithium-sulfur reaction contact time, improving production efficiency and product quality, and reducing impurities and production costs. The product has uniform elemental and particle size distribution and a high pass rate. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0016] Figure 1 A schematic diagram of a lithium sulfide preparation apparatus with stirring provided by this utility model; Figure 2 This is a schematic diagram of the reactor structure; In the diagram: 1. Melting cover; 2. Motor; 3. Furnace body; 4. Reactor; 5. Lifting hole; 6. Drive shaft; 7. Inner hexagonal groove; 8. Reactor sealing cover; 9. Stirring shaft; 10. Stirring blade. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example 1

[0019] refer to Figures 1-2 A lithium sulfide preparation apparatus with stirring, comprising: A furnace, comprising a furnace body 3 and a melting cover 1, wherein the melting cover 1 is detachably and sealingly connected to the upper end of the furnace body 3; The drive unit is located at the upper end of the melting cover 1, and the drive end of the drive unit extends into the interior of the furnace body 3. Reactor 4 is placed inside furnace body 3, and the upper end of reactor 4 is detachably and sealed with reactor sealing cover 8; The stirring section is located inside the reactor 4. The driving end of the stirring section extends to the outside of the reactor 4 and is rotatably and sealingly connected to the reactor sealing cover 8. The driving end of the stirring section is drivenly connected to the driving end of the driving section.

[0020] In this embodiment, the melting cover 1 and the furnace body 3 are sealed together by an interlocking rubber ring to achieve a complete seal.

[0021] In this embodiment, the reactor 4 and the reactor sealing cover 8 are connected by an interlocking rubber ring to achieve a complete seal.

[0022] The preferred wall thickness of the reactor 4 is 8-12 cm.

[0023] In this embodiment, the drive unit includes a motor 2 installed on the upper end of the melting cover 1 and a drive shaft 6 located inside the furnace body 3. The first end of the drive shaft 6 is driven connected to the output shaft of the motor 2, and the second end is driven connected to the drive end of the stirring unit. The output shaft of the motor 2 is rotatably and sealedly connected to the melting cover 1.

[0024] In this embodiment, the stirring unit includes: The stirring shaft 9 is rotatably and sealingly connected to the reactor sealing cover 8. The first end of the stirring shaft 9 is located outside the reactor 4 and is drivenly connected to the second end of the drive shaft 6. The second end of the stirring shaft 9 extends into the reactor 4. The stirring blade 10 is located inside the reaction vessel 4 and is fixedly connected to the stirring shaft 9.

[0025] In this embodiment, the stirring blade 10 is a double helical blade. The double helical stirring blade can lift the material at the bottom to the top, promoting uniform distribution of lithium and sulfur and rapid reaction.

[0026] Specifically, a magnetic fluid seal is used between the stirring shaft 9 and the reactor sealing cover 8.

[0027] Among them, the parts that enter the interior of the reactor 4, such as the double propeller blades and the stirring shaft 9, are all made of titanium, which enhances their corrosion resistance and extends their service life.

[0028] In this embodiment, the first end of the stirring shaft 9 is provided with an inner hexagonal groove 7, and the second end of the drive shaft 6 is provided with an outer hexagonal structure that matches the inner hexagonal groove 7.

[0029] Specifically, a hexagonal nut that fits into the inner hexagonal groove 7 is fixedly connected to the second end of the drive shaft 6.

[0030] In this embodiment, the reactor 4 is made of all titanium material; the reactor 4 is cylindrical, with a hemispherical closed bottom and an open top with a baffle extending outward by 20cm-30cm, preferably a baffle extending outward by 25cm.

[0031] In this embodiment, the enclosure is provided with a plurality of lifting holes 5 in a circumferential array, wherein the outer extension enclosure has lifting holes 5, which can be used to move the reactor 4 by means of a crane.

[0032] Specifically, the number of hanging holes 5 arranged in the circumferential array of the fence can be 3, 4 or 6, preferably 4.

[0033] The working process of the lithium sulfide preparation apparatus with stirring provided in this embodiment is as follows: The prepared lithium-sulfur mixture is placed into reactor 4, and then the reactor sealing cover 8 is placed on top, allowing the lower part of the stirring shaft 9 to enter the reactor 4. A crane is used to lower reactor 4 into the furnace through lifting hole 5, and then the furnace cover is placed on top, so that the hexagonal parts of the upper and lower parts are completely fitted. Then, the air in the furnace is evacuated and argon is injected, and a magnetic fluid seal is used to prevent gas from escaping. The furnace is then turned on to raise the temperature. After the predetermined temperature is reached, the stirring motor 2 is turned on. After a predetermined time, lithium sulfide powder is prepared.

[0034] The technical solution of this utility model has been fully described above. It should be noted that the specific implementation of this utility model is not limited to the above description. All technical solutions formed by those skilled in the art based on the spirit of this utility model by adopting equivalent transformations or equivalent transformations in terms of structure, method or function shall fall within the protection scope of this utility model.

Claims

1. A lithium sulfide preparation apparatus with stirring, characterized in that, include: A furnace, comprising a furnace body and a melting cover, wherein the melting cover is detachably and sealingly connected to the upper end of the furnace body; A drive unit is disposed at the upper end of the melting cover, and the drive end of the drive unit extends into the interior of the furnace body; A reaction vessel, which is placed inside the furnace, has a detachable and sealable reaction vessel cover at its upper end; The stirring section is located inside the reactor. The driving end of the stirring section extends to the outside of the reactor and is rotatably and sealingly connected to the reactor sealing cover. The driving end of the stirring section is drivenly connected to the driving end of the driving section.

2. The lithium sulfide preparation apparatus with stirring according to claim 1, characterized in that, The smelting cover and the furnace body are sealed together by an interlocking rubber ring.

3. The lithium sulfide preparation apparatus with stirring according to claim 1, characterized in that, The reactor and the reactor cover are sealed together by an interlocking rubber ring.

4. The lithium sulfide preparation apparatus with stirring according to claim 1, characterized in that, The drive unit includes a motor mounted on the upper end of the melting cover and a drive shaft located inside the furnace body. The first end of the drive shaft is driven to the output shaft of the motor, and the second end is driven to the drive end of the stirring unit. The output shaft of the motor is rotatably and sealingly connected to the melting cover.

5. The lithium sulfide preparation apparatus with stirring according to claim 4, characterized in that, The stirring unit includes: A stirring shaft is rotatably and sealingly connected to the reactor sealing cover. The first end of the stirring shaft is located outside the reactor and is drivenly connected to the second end of the drive shaft. The second end of the stirring shaft extends into the reactor. A stirring blade is located inside the reactor and is fixedly connected to the stirring shaft.

6. The lithium sulfide preparation apparatus with stirring according to claim 5, characterized in that, The stirring blades are double helical blades.

7. The lithium sulfide preparation apparatus with stirring according to claim 5, characterized in that, The first end of the stirring shaft is provided with an inner hexagonal groove, and the second end of the drive shaft is provided with an outer hexagonal structure that matches the inner hexagonal groove.

8. The lithium sulfide preparation apparatus with stirring according to claim 7, characterized in that, A hexagonal nut that fits the inner hexagonal groove is fixedly connected to the second end of the drive shaft.

9. The lithium sulfide preparation apparatus with stirring according to claim 1, characterized in that, The reactor is cylindrical with a hemispherical closed bottom and an open top with a baffle extending outwards by 20cm-30cm.

10. The lithium sulfide preparation apparatus with stirring according to claim 9, characterized in that, The enclosure is provided with multiple lifting holes in a circumferential array.

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