Hard carbon precursor calendering pre-oxidation system

Abstract

The utility model discloses a hard carbon precursor calendering pre-oxidation system. The hard carbon precursor calendering pre-oxidation system comprises a reaction assembly, a pressure assembly and a heating assembly. The reaction assembly comprises a reaction cavity, a graphite push plate is installed in the reaction cavity, and the graphite push plate moves in the reaction cavity in the horizontal direction; the pressure assembly comprises a stainless steel cavity, a steel push rod is arranged in the stainless steel cavity, the stainless steel cavity is communicated with compressed air, and the steel push rod is connected with a graphite push plate through the stainless steel push rod, so that the graphite push plate horizontally slides under the action of the steel push rod; the heating assembly comprises a heater installed at the bottom of the reaction cavity. According to the hard carbon precursor calendering pre-oxidation system provided by the invention, the flatness in the hard carbon precursor calendering pre-oxidation process is effectively ensured, the temperature rising speed in the hard carbon precursor calendering pre-oxidation process is accelerated, the constant temperature duration in the hard carbon precursor calendering pre-oxidation process is prolonged, and the optimal calendering pre-oxidation effect of the hard carbon precursor is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of hard carbon preparation, in particular to a hard carbon precursor calendering pre-oxidation system. Background Art

[0002] Hard carbon, an amorphous carbon material that is difficult to graphitize, has the characteristic of being difficult to sinter below 1000°C. It is usually prepared by pyrolysis of precursors such as polymers and biomass at high temperatures.

[0003] Hard carbon precursor pre-oxidation is a method of oxidizing the carbon precursor at a relatively low temperature, with the purpose of introducing oxygen functional groups into the carbon layer, thereby changing its thermochemical properties. In the prior art, a large amount of volatiles escape from the hard carbon precursor during the pre-oxidation process. After the volatiles escape, more pore structures are formed inside the material. Since the formation of too many invalid pore structures will increase the specific surface area of the material, thereby affecting the electrochemical properties of the material and reducing the initial efficiency of the material, how to reduce the generation of invalid pore structures during the precursor pre-oxidation process and ensure the density of the material structure as much as possible is the pain point of the current hard carbon preparation industry. Utility Model Content

[0004] In view of this, it is necessary to provide a hard carbon precursor calendering pre-oxidation system to solve the problem of excessive invalid pore structures generated during the hard carbon precursor pre-oxidation process in the prior art.

[0005] The present application provides a hard carbon precursor calendering pre-oxidation system, comprising:

[0006] A reaction assembly includes a reaction chamber, wherein a graphite push plate is installed in the reaction chamber and moves horizontally in the reaction chamber;

[0007] The pressure assembly includes a stainless steel cavity, a steel push rod is provided in the stainless steel cavity, the stainless steel cavity is communicated with compressed air, the steel push rod is connected to the graphite push plate through the stainless steel push rod 16, so that the graphite push plate slides horizontally under the action of the steel push rod;

[0008] The heating component includes a heater installed at the bottom of the reaction chamber. Further, the reaction chamber includes: a reaction chamber body; a graphite cover plate, the graphite cover plate is installed on the reaction chamber body, and a plurality of pores are evenly distributed on the graphite cover plate.

[0009] Furthermore, the reaction chamber further comprises:

[0010] A lock is provided, through which the graphite cover plate is fixed to the reaction chamber body.

[0011] Further, the reaction component further includes:

[0012] A first accommodation chamber, the reaction chamber is installed in the first accommodation chamber, a flip cover is installed on the top of the first accommodation chamber, and an exhaust hole is opened on the top of the flip cover.

[0013] Further, the pressure component further includes a pressure gauge installed on the stainless steel cavity.

[0014] Further, the pressure component further includes an exhaust port communicated with the stainless steel cavity.

[0015] Further, the pressure component further includes: a sealing ring, the sealing ring is sleeved on the stainless steel push rod 16 and fixed on the inner wall of the stainless steel cavity.

[0016] Further, the heating component further includes: a second accommodation chamber, installed at the bottom of the first accommodation chamber, and the heater is installed in the second accommodation chamber.

[0017] Further, the lock is made of a high-temperature resistant material.

[0018] The hard carbon precursor calendering pre-oxidation system provided by this application uses a steel push rod in a stainless steel cavity to push a graphite push plate to slide horizontally, which can effectively ensure the flatness during the hard carbon precursor calendering pre-oxidation process. At the same time, by applying pressure with compressed air in the stainless steel cavity, the heating rate during the hard carbon precursor calendering pre-oxidation process can be accelerated, and the constant temperature duration during the hard carbon precursor calendering pre-oxidation process can be extended, ensuring that the hard carbon precursor calendering pre-oxidation effect reaches the optimal level. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of a hard carbon precursor calendering pre-oxidation system provided by an embodiment of the present application;

[0021] In the figure, 1, graphite push plate; 2, stainless steel cavity; 3, compressed air; 4, steel push rod; 5, heater; 6, reaction chamber body; 7, graphite cover plate; 8, lock; 9, first accommodation chamber; 10, flip cover; 11, exhaust hole; 12, pressure gauge; 13, exhaust port; 14, sealing ring; 15, second accommodation chamber; 16, stainless steel push rod 16. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0023] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the ordinary meanings understood by those of ordinary skill in the art to which the present disclosure pertains. The terms "first", "second", and the like used in the present disclosure do not denote any order, quantity, or importance, but are only used to distinguish different components. The terms such as "include" or "comprise" mean that the elements or items appearing before this word cover the elements or items listed after this word and their equivalents, without excluding other elements or items. The terms such as "upper", "lower", "left", "right", etc. are only used to represent relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0024] Please refer to Figure 1 , the present utility model provides a hard carbon precursor calendering pre-oxidation system, including: a reaction component, a pressure component, and a heating component. The reaction component includes a reaction chamber, in which a graphite push plate 1 is installed and the graphite push plate 1 moves horizontally in the reaction chamber. The pressure component includes: a stainless steel cavity 2, which is communicated with compressed air 3. A steel push rod 4 is accommodated in the stainless steel cavity 2. The steel push rod 4 is connected to the graphite push plate 1 through a stainless steel push rod 16, so that the graphite push plate 1 horizontally slides under the action of the steel push rod 4. The heating component includes: a heater 5 installed at the bottom of the reaction chamber.

[0025] In this embodiment, the stainless steel cavity 2 uses compressed air 3 as the pressure medium, which is simple and convenient to release pressure and ensures pressure controllability. The steel push rod 4 in the stainless steel cavity 2 drives the stainless steel push rod 16 and the graphite push plate 1 to slide in the direction of the hard carbon precursor under the action of the compressed air 3, thereby pushing the hard carbon precursor powder to move. The heater 5 is used for high-temperature pre-oxidation of the hard carbon precursor. The reaction chamber and the graphite push plate 1 are both made of graphite material, which has good heat transfer performance and good material stability, ensuring the calendering effect while making the hard carbon precursor heated evenly.

[0026] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0027] By means of compressed air 3, a steel push rod 4 within a stainless-steel cavity 2 is utilized to push a graphite push plate 1 to slide horizontally, which can effectively ensure the flatness during the calendering pre-oxidation process of the hard carbon precursor and reduce the generation of ineffective pore structures. Meanwhile, by applying pressure with the compressed air 3 within the stainless-steel cavity 2, the heating rate during the calendering pre-oxidation process of the hard carbon precursor can be accelerated, and the constant-temperature duration during the calendering pre-oxidation process of the hard carbon precursor can also be extended, ensuring that the calendering pre-oxidation effect of the hard carbon precursor reaches the optimal level.

[0028] In some embodiments, the reaction chamber includes: a reaction chamber body 6; a graphite cover plate 7, which is installed on the reaction chamber body 6, and a plurality of air holes are evenly distributed on the graphite cover plate 7.

[0029] In this embodiment, the graphite cover plate 7 can be fixed by positioning pins, and the air holes help to discharge the volatile components generated by the hard carbon precursor from the cavity and release the cavity pressure.

[0030] In some embodiments, the reaction chamber further includes: a lock 8, and the graphite cover plate 7 is fixed on the reaction chamber body 6 by the lock 8.

[0031] In some embodiments, the reaction assembly further includes: a first accommodating chamber 9, the reaction chamber is installed within the first accommodating chamber 9, a flip cover 10 is installed at the top of the first accommodating chamber 9, and an exhaust hole 11 is provided at the top of the flip cover 10.

[0032] In this embodiment, when the flip cover 10 is opened, it is convenient for the staff to fill in or take out the corresponding materials into or from the reaction chamber. The exhaust hole 11 is provided at the top of the flip cover 10, which is beneficial for discharging the waste gas in the reaction chamber and preventing the pressure in the first accommodating chamber 9 from becoming too high and causing an explosion after the hard carbon precursor expands due to heat in the reaction chamber.

[0033] In some embodiments, the pressure assembly further includes a pressure gauge 12 installed on the stainless-steel cavity 2, which is used to monitor the internal pressure of the stainless-steel cavity 2.

[0034] In some embodiments, the pressure assembly further includes an exhaust port 13 communicated with the stainless-steel cavity 2.

[0035] In this embodiment, the exhaust port 13 is installed at the bottom of the stainless-steel cavity 2, and by adjusting the internal pressure of the stainless-steel cavity 2, the movement of the steel push rod 4 is realized.

[0036] In some embodiments, the pressure assembly further includes: a sealing ring 14, which is sleeved on the stainless-steel push rod 16 and fixed on the inner wall of the stainless-steel cavity 2.

[0037] In this embodiment, the sealing ring 14 can reduce the wear generated by the horizontal movement of the stainless-steel push rod 16 within the stainless-steel cavity 2, and can also prevent the leakage of compressed air 3, ensuring the sealing performance of the stainless-steel cavity 2.

[0038] In some embodiments, the heating component further includes: a second accommodation chamber 15 installed at the bottom of the first accommodation chamber 9, and a heater 5 installed inside the second accommodation chamber 15.

[0039] In some embodiments, the lock 8 is made of a high-temperature resistant material. Using a high-temperature resistant material can prevent the lock 8 from deforming at high temperatures and ensure the service life of the reaction chamber. Specifically, the lock 8 can be made of ceramic material.

[0040] The working principle of this application is as follows: By opening the flip cover 10, the lock 8, and the graphite cover plate 7, the hard carbon precursor is loaded into the reaction chamber body 6. After the material is filled and compacted, the graphite cover plate 7 is placed on the reaction chamber body 6 and locked by the lock 8. After closing the flip cover 10, the exhaust port 13 is closed, and compressed air 3 is used to inflate and pressurize the stainless steel cavity 2; when the pressure gauge 12 shows 1 - 2 Mpa, stop supplying compressed air 3 into the stainless steel cavity 2, set the temperature of the heater 5 to 500 °C, and heat the reaction chamber. As the temperature rises, the volatile matter discharged from the hard carbon precursor causes the bulk volume to start shrinking, and the steel push rod 4 drives the graphite push plate 1 to move towards the hard carbon precursor under the action of pressure to roll the hard carbon precursor. When the volume of the hard carbon precursor no longer changes, stop heating the reaction chamber. After the temperature drops to room temperature, open the exhaust port 13 to release the pressure of the stainless steel cavity 2 to atmospheric pressure, then reset the graphite push plate 1, and take out the material in the reaction chamber body 6 to complete the rolling pre-oxidation process of the hard carbon precursor.

[0041] It should be noted that the components between the embodiments of the present disclosure can be interchanged as long as they can play corresponding roles.

[0042] The following points need to be explained:

[0043] (1) Unless otherwise defined, in the embodiments of the present disclosure and the drawings, the same reference numeral represents the same meaning.

[0044] (2) In the drawings of the embodiments of the present disclosure, only the structures related to the embodiments of the present disclosure are involved, and other structures can refer to the general design.

[0045] (3) For clarity, in the drawings used to describe the embodiments of the present disclosure, the components or regions are enlarged. It can be understood that when an element is referred to as being "on" or "under" another element, the element can be "directly" on or under the other element, or there can be intermediate elements.

[0046] As described above, it is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claimed rights.

Claims

1. A rolling pre-oxidation system for hard carbon precursors, characterized in that, Comprising: A reaction component, including a reaction chamber, in which a graphite push plate (1) is installed, and the graphite push plate (1) moves horizontally in the reaction chamber; A pressure component, including a stainless steel cavity (2), which is communicated with compressed air (3), a steel push rod (4) is accommodated in the stainless steel cavity (2), and the steel push rod (4) is connected to the graphite push plate (1) through a stainless steel push rod (16), so that the graphite push plate (1) slides horizontally under the action of the steel push rod (4); A heating component, including a heater (5) installed at the bottom of the reaction chamber.

2. The system according to claim 1, wherein The reaction chamber includes: A reaction chamber body (6); A graphite cover plate (7), which is installed on the reaction chamber body (6), and a plurality of air holes are evenly distributed on the graphite cover plate (7).

3. The system according to claim 2, wherein The reaction chamber further includes: A lock (8), and the graphite cover plate (7) is fixed on the reaction chamber body (6) through the lock (8).

4. The system according to claim 2 or 3, characterized in that, The reaction component further includes: A first accommodating chamber (9), the reaction chamber is installed in the first accommodating chamber (9), a flip cover (10) is installed at the top of the first accommodating chamber (9), and an exhaust hole (11) is opened at the top of the flip cover (10).

5. The system according to claim 2 or 3, characterized in that, The pressure component further includes a pressure gauge (12) installed on the stainless steel cavity (2).

6. The system according to claim 5, wherein The pressure component further includes an exhaust port (13) communicated with the stainless steel cavity (2).

7. The system according to claim 1, 2, 3 or 6, characterized in that, The pressure component further includes: A sealing ring (14), the sealing ring (14) is sleeved on the stainless steel push rod (16) and fixed on the inner wall of the stainless steel cavity (2).

8. The system according to claim 4, characterized in that The heating component further includes: A second accommodating chamber (15), installed at the bottom of the first accommodating chamber (9), and the heater (5) is installed in the second accommodating chamber (15).

9. The system according to claim 3, characterized in that, The lock (8) is made of a high-temperature resistant material.

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