A device for high-temperature treatment of lithium-ion battery negative electrode sheets

Abstract

This invention provides a device for high-temperature treatment of lithium-ion battery negative electrode sheets, comprising: a sintering furnace, a storage assembly, and a vibration assembly; the storage assembly is disposed inside the sintering furnace and elastically connected to the inner bottom of the sintering furnace, for storing and arranging the negative electrode sheets; the vibration assembly includes a heat-insulating cylinder disposed in the upper middle part of the sintering furnace, a protrusion provided at the upper end of the storage assembly, the protrusion penetrating the heat-insulating cylinder and sliding up and down along the heat-insulating cylinder, an electromagnet provided at the inner top of the heat-insulating cylinder, and a magnetic block connected to the top of the protrusion. This invention completes the screening step after high-temperature treatment during the cooling process, reducing the transfer process of the negative electrode sheets and the space occupied by the screening equipment, improving work efficiency, reducing the space occupied by the equipment, and possessing strong practicality.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery processing equipment technology, and in particular to a device for high-temperature processing of lithium-ion battery negative electrode sheets. Background Technology

[0002] With the widespread use of electronic products, the number of used lithium-ion batteries has increased dramatically. These used batteries contain abundant valuable metal resources, such as copper, cobalt, and lithium, and have extremely high recycling value. The negative electrode, as a crucial component of lithium-ion batteries, is typically composed of key materials such as copper foil and graphite. Copper foil, as a current collector, plays a vital role in the battery and, due to its excellent conductivity and ductility, has high economic value.

[0003] Lithium-ion battery negative electrode sheets are mainly composed of carbon materials such as graphite, binders (such as PVDF), and current collectors (such as copper foil). High-temperature treatment removes organic components such as binders from the negative electrode sheets, separating the graphite from the copper foil for subsequent recycling. However, this high-temperature treatment process involves crushing, high-temperature pyrolysis, cooling separation, and post-processing, requiring large equipment footprints and resulting in low efficiency.

[0004] To address this issue, we propose a device for high-temperature treatment of lithium-ion battery anode sheets, which solves the problems of large size and low efficiency of existing high-temperature treatment equipment. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a device for high-temperature treatment of lithium-ion battery negative electrode sheets, which solves the problems of large size and low working efficiency of existing high-temperature treatment equipment.

[0006] To achieve the above and other related objectives, this utility model provides an apparatus for high-temperature processing of lithium-ion battery negative electrode sheets, comprising: a sintering furnace, a storage assembly, and a vibration assembly; The storage assembly is located inside the sintering furnace and is elastically connected to the inner bottom of the sintering furnace, and is used for storing and placing the negative electrode sheet. The vibration assembly includes a heat insulation cylinder located in the upper middle part of the sintering furnace. The upper end of the placement assembly is provided with a protrusion that penetrates the heat insulation cylinder and can slide up and down along the heat insulation cylinder. An electromagnet is provided at the inner top of the heat insulation cylinder, and a magnetic block is connected to the top of the protrusion.

[0007] Preferably, the sintering furnace has several mounting seats at its inner bottom, and the lower end of the placement component has several pillars. Each pillar passes through the mounting seat and can slide up and down along the mounting seat. Each pillar has a return spring sleeved on its outer surface and inside the mounting seat.

[0008] Preferably, the storage component includes a storage rack with a multi-faceted hollow structure. The storage rack has several storage cavities and ventilation cavities arranged alternately in a vertical sequence. Each storage cavity is equipped with a sieve box. The side wall of the storage rack is equipped with a locking component for fixing all the sieve boxes to the storage rack.

[0009] Preferably, the sieve box includes a frame, the bottom of the frame is provided with a sieve, and the lower end of the sieve is detachably connected to a collection box.

[0010] Preferably, the locking element includes rotating seats located at the four corners of the front end of the shelf, U-shaped frames connected between the rotating seats on the same side, and arc-shaped grooves provided at the bottom of the two U-shaped frames. A locking block is rotatably connected to the front end of the upper end of the shelf, and the locking block matches the groove.

[0011] Preferably, the shape of the card block is smaller at the top and larger at the bottom, and the height of the U-shaped frame is the same as the height of the shelf.

[0012] As described above, the apparatus for high-temperature treatment of lithium-ion battery negative electrode sheets disclosed in this utility model has the following beneficial effects: 1. This utility model completes the screening step after high-temperature treatment during the cooling process, which reduces the transfer process of the negative electrode sheet and the space occupied by the screening equipment, improves work efficiency, reduces the space occupied by the equipment, and has strong practicality.

[0013] 2. This utility model simplifies the operation and improves work efficiency by installing a vibration component inside the sintering furnace and controlling the up-and-down vibration of the shelf with an electromagnet. This allows the high-temperature treated negative electrode sheets inside the shelf to complete the screening operation during vibration.

[0014] Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value. Attached Figure Description

[0015] Figure 1 The image shown is a perspective view of a device for high-temperature treatment of lithium-ion battery negative electrode sheets according to this utility model.

[0016] Figure 2 The image shown is a cross-sectional view of a sintering furnace for a high-temperature treatment apparatus for lithium-ion battery negative electrode sheets according to this invention.

[0017] Figure 3 The image shown is a cross-sectional view of the mounting base of the device for high-temperature treatment of lithium-ion battery negative electrode sheets according to this utility model.

[0018] Figure 4 The image shown is a perspective view of a sieve box for a high-temperature treatment device for lithium-ion battery negative electrode sheets according to this utility model.

[0019] Figure 5 The diagram shown is an exploded view of the locking component of a device for high-temperature treatment of lithium-ion battery negative electrode sheets according to this utility model.

[0020] Component designation explanation 1. Sintering furnace; 2. Storage assembly; 3. Vibration assembly; 20. Shelf; 21. Storage compartment; 22. Ventilation compartment; 23. Sieve box; 24. Locking device; 230. Frame; 231. Screen; 232. Collection box; 240. Rotary seat; 241. U-shaped frame; 242. Groove; 243. Locking block; 30. Insulation cylinder; 31. Protrusion; 32. Electromagnet; 33. Magnetic block; 34. Mounting base; 35. Support column; 36. Return spring. Detailed Implementation

[0021] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0022] Please see Figures 1 to 5 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0023] like Figure 1-5 As shown, this utility model provides a device for high-temperature processing of lithium-ion battery negative electrode sheets, including: a sintering furnace 1, a storage assembly 2, and a vibration assembly 3.

[0024] The storage component 2 is located inside the sintering furnace 1 and is flexibly connected to the inner bottom of the sintering furnace 1, and is used for storing and placing the negative electrode sheet.

[0025] The vibration assembly 3 includes a heat insulation cylinder 30 located in the upper middle part of the sintering furnace 1. A protrusion 31 is provided at the upper end of the placement assembly 2, penetrating the heat insulation cylinder 30 and sliding up and down along it. An electromagnet 32 ​​is located at the inner top of the heat insulation cylinder 30. Both the heat insulation cylinder 30 and the protrusion 31 are made of heat-insulating material to maintain the internal temperature of the heat insulation cylinder 30 at room temperature and prevent damage to the electromagnet 32 ​​at high temperatures. A magnetic block 33 is connected to the top of the protrusion 31. In use, by rapidly opening and closing the electromagnet 32, the placement assembly 2 rises with the magnetic block 33 and then falls due to its own weight, repeating this rapid up-and-down motion to generate vibration. This structure allows the copper foil current collector and the negative electrode active material graphite powder to be separated physically through vibration during the cooling stage after high-temperature treatment. This reduces the space occupied by the equipment, facilitates the removal of the negative electrode sheet from the sintering furnace 1 for direct post-processing, and improves work efficiency.

[0026] In one embodiment, the sintering furnace 1 has several mounting seats 34 at its inner bottom, and the lower end of the placement assembly 2 has several support columns 35. Each support column 35 passes through the mounting seat 34 and can slide up and down along the mounting seat 34. A return spring 36 is sleeved on the outer surface of each support column 35 and inside the mounting seat 34. When the placement assembly 2 rises with the magnetic block 33, it simultaneously pulls the support column 35 to slide upward within the mounting seat 34. When the support column 35 rises, it squeezes the return spring 36. After the electromagnet 32 ​​is turned off, the magnetic block 33 loses its magnetic attraction, and the return spring 36 drives the mounting seat 34 to quickly descend and reset through the support column 35, thereby improving vibration performance.

[0027] In one embodiment, the storage assembly 2 includes a shelf 20 with a multi-faceted perforated structure to facilitate temperature transfer. The shelf 20 has several storage cavities 21 and ventilation cavities 22 arranged alternately in a vertical sequence. Each storage cavity 21 contains a sieve box 23. The ventilation cavities 22 separate adjacent storage cavities 21, allowing the sieve box 23 to receive high temperatures. A locking member 24 is provided on the side wall of the shelf 20 to secure all the sieve boxes 23 to the shelf 20.

[0028] In one embodiment, the sieve box 23 includes a frame 230, and a sieve 231 is provided at the bottom of the frame 230. The negative electrode sheet of the battery is placed on the sieve 231 and is sieved under the action of vibration. A collection box 232 is detachably connected to the lower end of the sieve 231. The collection box 232 is used to collect the sieved material and realize the separation function.

[0029] In one embodiment, the locking member 24 includes rotating seats 240 located at the four corners of the front end of the shelf 20. A U-shaped frame 241 is connected between the rotating seats 240 on the same side. The two ends of the U-shaped frame 241 are rotatably connected to the rotating seats 240, allowing the U-shaped frame 241 to rotate about the line connecting the two rotating seats 240 on the same side as an axis, thus blocking the sieve box 23. The bottom of each U-shaped frame 241 is provided with an arc-shaped groove 242. A locking block 243 is rotatably connected to the front end of the upper end of the shelf 20. The locking block 243 matches the groove 242. When the locking block 243 hangs down naturally, if the locking block 243 is locked in the groove 242, the U-shaped frame 241 can be fixed, thereby achieving the locking function.

[0030] In one embodiment, the locking block 243 is shaped with a smaller top and a larger bottom, so that the center of gravity of the locking block 243 is lower and it is accurately locked in the groove 242. The height of the U-shaped frame 241 is the same as the height of the shelf 20 to ensure that all sieve boxes 23 are locked.

[0031] The specific usage process of this utility model is as follows: The crushed negative electrode sheet is placed on the screen 231 of the sieve box 23, all the sieve boxes 23 are placed in the storage cavity 21, and placed in the sintering furnace 1 for high-temperature treatment. The negative electrode sheet after high-temperature treatment is cooled in the sintering furnace 1. By quickly opening and closing the electromagnet 32, the placement component 2 rises with the magnetic block 33 and then falls due to its own weight, and the rapid up and down repeated movement generates vibration, so that the negative electrode sheet in the sieve box 23 completes the screening and separation operation under the action of vibration.

[0032] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An apparatus for high temperature processing of lithium ion battery negative electrode sheet, characterized by, include: Sintering furnace (1), storage assembly (2) and vibration assembly (3); The storage component (2) is located inside the sintering furnace (1) and is elastically connected to the inner bottom of the sintering furnace (1) for storing and placing the negative electrode sheet; The vibration assembly (3) includes a heat insulation cylinder (30) located in the middle of the upper part of the sintering furnace (1). The upper end of the placement assembly (2) is provided with a protrusion (31). The protrusion (31) penetrates the heat insulation cylinder (30) and can slide up and down along the heat insulation cylinder (30). An electromagnet (32) is provided at the inner top of the heat insulation cylinder (30). A magnetic block (33) is connected to the top of the protrusion (31).

2. The apparatus for processing the lithium-ion battery negative electrode sheet at high temperature according to claim 1, characterized in that: The sintering furnace (1) has several mounting seats (34) at its inner bottom, and the lower end of the placement component (2) has several support pillars (35). Each support pillar (35) passes through the mounting seat (34) and can slide up and down along the mounting seat (34). Each support pillar (35) has a return spring (36) sleeved on its outer surface and inside the mounting seat (34).

3. The apparatus for processing the lithium-ion battery negative electrode sheet at high temperature according to claim 1, characterized in that: The storage component (2) includes a storage rack (20), which is a multi-faceted hollow structure. The storage rack (20) has several storage cavities (21) and ventilation cavities (22) arranged alternately in the upper and lower parts. Each storage cavity (21) is provided with a sieve box (23). The side wall of the storage rack (20) is provided with a locking member (24), which is used to fix all the sieve boxes (23) to the storage rack (20).

4. The apparatus for high temperature processing of lithium ion battery negative electrode sheet according to claim 3, characterized in that: The sieve box (23) includes a frame (230), and a sieve (231) is provided at the bottom of the frame (230). A collection box (232) is detachably connected to the lower end of the sieve (231).

5. The apparatus for processing lithium ion battery negative electrode sheet at high temperature according to claim 3, characterized in that: The locking component (24) includes a rotating seat (240) located at the four corners of the front end of the shelf (20). A U-shaped frame (241) is connected between the rotating seats (240) on the same side. The bottom of the two U-shaped frames (241) is provided with an arc-shaped groove (242). A locking block (243) is rotatably connected to the front end of the upper end of the shelf (20). The locking block (243) matches the groove (242).

6. The apparatus for high temperature processing of lithium ion battery negative electrode sheet according to claim 5, characterized in that: The shape of the card block (243) is smaller at the top and larger at the bottom, and the height of the U-shaped frame (241) is the same as the height of the shelf (20).

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