A drying device and method for repairing materials in decommissioned lithium iron phosphate batteries.

Abstract

This invention discloses a drying device and method for repairing retired lithium iron phosphate battery materials, comprising: a support assembly including a rectangular support base, with two parallel I-beams fixedly connected to the lower end of the support base, and an arc-shaped support seat and two roller support units fixedly connected to the upper end of the support base; and a drying assembly including a guide cylinder fixedly connected to the upper end of the arc-shaped support seat, with a feed pipe fixedly connected to the upper end of the guide cylinder and communicating with its interior, and a feed hopper connected to the upper end of the feed pipe, and a drying cylinder rotatably connected to the inner wall of the guide cylinder. This invention utilizes the intersecting movement of a first L-shaped support rod and a second L-shaped support rod during the drying process to dry the lithium battery material, ensuring that the gravity-driven lithium battery material is fully dried, reducing uneven temperature distribution, and guaranteeing drying quality while also improving the quality of subsequent processing.

Description

Technical Field

[0001] This invention relates to the technical field of lithium battery repair, and in particular to a drying device and method for repairing materials in retired lithium iron phosphate batteries. Background Technology

[0002] Lithium-ion batteries are widely used in modern electronic devices due to their high energy density, light weight, long lifespan, and lack of memory effect. With rapid economic development and the trend towards miniaturization of electrical appliances, their development prospects are broad. Lithium iron phosphate batteries are a common type of lithium battery. Due to their advantages such as safety, environmental friendliness, good stability, high specific capacity, and low price, especially their stable structure and safe performance, they are suitable for the large power sources required by electric vehicles, resulting in large market demand and widespread use in new energy electric vehicles. After a period of use in new energy electric vehicles, lithium iron phosphate batteries need to be replaced with new ones, leading to a large backlog of retired batteries. If these retired lithium iron phosphate batteries are not properly disposed of, they will cause significant environmental pollution. Retired lithium iron phosphate batteries have significant resource value, with lithium having the highest potential value. Therefore, the recycling of retired lithium iron phosphate batteries is urgent.

[0003] Retired lithium iron phosphate batteries require drying during recycling. However, during this process, the battery materials tend to clump together, affecting the drying quality. Furthermore, the drying process is not easy to heat evenly, which can affect the quality of subsequent processing. To address these issues, we propose a drying device and method for repairing retired lithium iron phosphate battery materials. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the drying equipment and methods for repairing materials of retired lithium iron phosphate batteries, the present invention is proposed.

[0006] Therefore, the purpose of this invention is to provide a drying device and method for repairing retired lithium iron phosphate battery materials. During the drying process, the lithium battery materials are dried by the cross-movement of the first L-shaped support rod and the second L-shaped support rod, so that the lithium battery materials moving under gravity can be fully dried, reducing uneven temperature distribution, ensuring drying quality and helping to improve the quality of subsequent processing.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a drying device for repairing materials of retired lithium iron phosphate batteries, comprising:

[0008] The support assembly includes a rectangular support base, the lower end of which is fixedly connected to two parallel I-shaped steels, and the upper end of which is fixedly connected to an arc-shaped support seat and two roller support units.

[0009] A drying assembly includes a guide cylinder fixedly connected to the upper end of an arc-shaped support base. The upper end of the guide cylinder is fixedly connected to a feed pipe communicating with its interior, and the upper end of the feed pipe is connected to a feed hopper. A drying cylinder is rotatably connected to the inner wall of the guide cylinder, and the drying cylinder is connected to the upper side of two roller support units. The upper end of the support base is provided with a drive unit connected to the drying cylinder.

[0010] A horizontal shaft is rotatably connected to the center of the side wall of the guide cylinder, and the horizontal shaft is connected to the drive unit through a transmission unit. A circular groove is opened on the side wall of the horizontal shaft, and a guide rod is slidably connected in the circular groove. Three strip-shaped openings are evenly distributed on the outer side wall of the horizontal shaft inside the guide cylinder. A opening and closing material distribution unit corresponding to the position of the three strip-shaped openings is provided on the side wall of the guide rod. A rotating shaft is connected to the side wall of the horizontal shaft through a flange. The rotating shaft is correspondingly set in the drying cylinder, and a drying unit that cooperates with the rotating shaft is provided in the drying cylinder.

[0011] A sealing end cap is rotatably connected to the outer wall of the drying cylinder.

[0012] As a preferred embodiment of the drying equipment for repairing decommissioned lithium iron phosphate battery materials according to the present invention, the roller support unit includes a U-shaped bracket fixedly connected to the upper end of the support base, a roller is rotatably connected inside the U-shaped bracket, and an annular block corresponding to the position of the roller is fixedly sleeved on the outer wall of the drying cylinder, and the roller and the annular block are in rolling connection.

[0013] As a preferred embodiment of the drying equipment for repairing decommissioned lithium iron phosphate battery materials according to the present invention, the driving unit includes a driving motor fixedly connected to the upper end of the support base, a transmission shaft fixedly connected to the output end of the driving motor, a gear frame fixedly connected to the upper end of the support base, the transmission shaft passing through the gear frame, and a cylindrical gear fixedly sleeved on the outer wall of the transmission shaft inside the gear frame, and a gear ring meshing with the cylindrical gear fixedly sleeved on the outer wall of the drying cylinder.

[0014] As a preferred embodiment of the drying equipment for repairing decommissioned lithium iron phosphate battery materials according to the present invention, the transmission unit includes a first pulley fixedly sleeved on the outer wall of the transmission shaft, a second pulley fixedly sleeved on the outer wall of the horizontal shaft, the first pulley and the second pulley being connected by a belt, and a support corresponding to the transmission shaft being fixedly connected to the upper end of the support base, the transmission shaft passing through the support and extending to its outer side.

[0015] As a preferred embodiment of the drying equipment for repairing decommissioned lithium iron phosphate battery materials according to the present invention, the opening and closing material distribution unit includes a strip groove formed on the outer wall of the guide rod, a guide support rod rotatably connected in the strip groove, a sliding groove formed on the side wall opposite to the guide rod, a slider slidably connected in the sliding groove, a movable block slidably connected in the strip groove, the slider and the movable block being fixedly connected by a compression spring, the inner wall of the guide cylinder being conical, and the thickness of the guide cylinder decreasing sequentially from the outside to the inside and finally being the same as the inner wall of the drying cylinder, the guide support rod being able to unfold from the strip opening and perform a dispersing operation on the lithium battery material.

[0016] As a preferred embodiment of the drying equipment for repairing decommissioned lithium iron phosphate battery materials according to the present invention, a U-shaped mounting seat is fixedly connected to the outer wall of the guide rod, the U-shaped mounting seat is slidably sleeved on the outer side of the horizontal shaft, and a fastening bolt fixed to the horizontal shaft is threadedly connected to the outer wall of the U-shaped mounting seat.

[0017] As a preferred embodiment of the drying equipment for repairing decommissioned lithium iron phosphate battery materials according to the present invention, the drying unit includes multiple first L-shaped support rods fixedly connected to the outer wall of the rotating shaft; multiple strip plates are evenly distributed on the inner wall of the drying cylinder; a circular chamber is provided inside the strip plate; an electric heating tube is provided inside the circular chamber; two heat conduction ports communicating with the circular chamber are opened on the side wall of the strip plate; and a heat conduction plate for heat conduction is fixedly connected inside the heat conduction port; a second L-shaped support rod is fixedly connected to the side wall of the strip plate away from the inner wall of the drying cylinder, and the second L-shaped support rod is arranged in the opposite direction to the first L-shaped support rod.

[0018] As a preferred embodiment of the drying equipment for repairing decommissioned lithium iron phosphate battery materials according to the present invention, the first L-shaped support rod has a bending angle of 135 degrees, the second L-shaped support rod has an angle of 90 degrees, the material guide cylinder and the drying cylinder are inclined downwards, and the lithium battery material can slide downwards under the influence of gravity.

[0019] As a preferred embodiment of the drying equipment for repairing decommissioned lithium iron phosphate battery materials according to the present invention, wherein: a rotating seat corresponding to the sealing end cap is provided on the outer wall of the drying cylinder, and the sealing end cap is rotatably connected in the rotating seat; a handle structure is provided at the lower end of the sealing end cap; and the electric heating tube is electrically connected to an external controller and power supply device.

[0020] As a preferred embodiment of the drying equipment for repairing decommissioned lithium iron phosphate battery materials according to the present invention, the drying method of the drying equipment for repairing decommissioned lithium iron phosphate battery materials includes the following steps:

[0021] Step 1: The previously pre-dried retired lithium iron phosphate battery material is fed into the guide cylinder from the feed hopper, and the drive motor is started at the same time. Under the meshing of the cylindrical gear and the gear ring, the drying cylinder makes a circular motion. At the same time, the horizontal shaft is rotated by the belt drive, which drives the opening and closing material distribution unit inside the horizontal shaft to perform material distribution and dispersing operation on the lithium battery material, so that the lithium battery material can be evenly transported from the guide cylinder to the drying cylinder.

[0022] Step 2: After the lithium battery material is transported to the drying cylinder under the action of gravity, the drying unit inside can fully dry the lithium battery material. Specifically, the temperature inside the drying cylinder is controlled by multiple electric heating tubes and a controller to ensure that the drying cylinder is at a suitable temperature and that the lithium battery material is fully dried while the first L-shaped support rod and the second L-shaped support rod move in a cross motion.

[0023] Step 3: The dried lithium battery material can be discharged from the sealed end cap for subsequent processing. The opening and closing material distribution unit can be disassembled and cleaned after use. Specifically, disconnect the U-shaped mounting base from the horizontal shaft and pull the U-shaped mounting base outward to disengage the guide rod from the horizontal shaft. When in use, simply insert the guide rod into the side wall of the horizontal shaft and fix the U-shaped mounting base.

[0024] The beneficial effects of this invention are as follows: This invention uses a separating and dispersing unit to break up the lithium battery material at the feeding point, thereby reducing the stacking of recycled materials. Furthermore, during the drying process, the lithium battery material is dried by the cross-movement of the first L-shaped support rod and the second L-shaped support rod, which allows the lithium battery material moving under gravity to be fully dried, reducing uneven temperature distribution and ensuring the quality of drying while also helping to improve the quality of subsequent processing. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0026] Figure 1 This is a schematic diagram of the overall structure of the drying equipment and method for repairing materials in decommissioned lithium iron phosphate batteries according to the present invention.

[0027] Figure 2 This is a side view of the drying equipment and method for repairing materials in decommissioned lithium iron phosphate batteries according to the present invention.

[0028] Figure 3 This is a schematic diagram of the internal structure of the drying equipment and method for repairing materials in decommissioned lithium iron phosphate batteries according to the present invention.

[0029] Figure 4 This is a side cross-sectional view of the drying equipment and method for repairing materials in decommissioned lithium iron phosphate batteries according to the present invention.

[0030] Figure 5 This is a side cross-sectional view of the drying equipment and method for repairing materials in decommissioned lithium iron phosphate batteries according to the present invention.

[0031] Figure 6 This is a schematic diagram of the opening and closing material distribution unit structure of the drying equipment and method for repairing decommissioned lithium iron phosphate battery materials according to the present invention.

[0032] Figure 7 This is a front cross-sectional view of the feed cylinder of the drying equipment and method for repairing materials in decommissioned lithium iron phosphate batteries according to the present invention.

[0033] Figure 8 This is a schematic diagram of the cross-sectional structure of the drying equipment and method for repairing decommissioned lithium iron phosphate battery materials according to the present invention. Detailed Implementation

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0035] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0036] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0037] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0038] Reference Figure 1 - Figure 8 A drying apparatus for repairing materials in retired lithium iron phosphate batteries is provided, comprising:

[0039] The support assembly 100 and the drying assembly 200 are provided. The support assembly 100 includes a rectangular support base 101. Two parallel I-shaped steels 102 are fixedly connected to the lower end of the support base 101. An arc-shaped support seat and two roller support units are fixedly connected to the upper end of the support base 101. Each roller support unit includes a U-shaped bracket 103 fixedly connected to the upper end of the support base 101. A roller 104 is rotatably connected inside the U-shaped bracket 103. An annular block 105 corresponding to the position of the roller 104 is fixedly sleeved on the outer wall of the drying cylinder 203, and the roller 104 and the annular block 105 are in rolling connection.

[0040] The drying assembly 200 includes a guide cylinder 201 fixedly connected to the upper end of an arc-shaped support base. A feed pipe communicating with the interior of the guide cylinder 201 is fixedly connected to the upper end of the guide cylinder 201, and a feed hopper 202 is connected to the upper end of the feed pipe. A drying cylinder 203 is rotatably connected to the inner wall of the guide cylinder 201, and the drying cylinder 203 is connected to the upper side of two roller support units. A drive unit connected to the drying cylinder 203 is provided at the upper end of the support base 101. Specifically, the drive unit includes components fixedly connected to the support base. The drive motor 208 is located at the upper end of the support frame 101. The output end of the drive motor 208 is fixedly connected to the transmission shaft 209. The upper end of the support frame 101 is fixedly connected to the gear frame 210. The transmission shaft 209 passes through the gear frame 210. A cylindrical gear 211 is fixedly sleeved on the outer wall of the transmission shaft 209 inside the gear frame 210. A gear ring 212 that meshes with the cylindrical gear 211 is fixedly sleeved on the outer wall of the drying cylinder 203. The rotation of the drying cylinder 203 is achieved through the meshing of the cylindrical gear 211 and the gear ring 212.

[0041] Furthermore, a horizontal shaft 204 is rotatably connected to the center of the side wall of the guide cylinder 201, and the horizontal shaft 204 is connected to the drive unit through a transmission unit. Specifically, the transmission unit includes a first pulley 213 fixedly sleeved on the outer wall of the drive shaft 209, and a second pulley 214 fixedly sleeved on the outer wall of the horizontal shaft 204. The first pulley 213 and the second pulley 214 are connected by a belt 215. A support 216 corresponding to the drive shaft 209 is fixedly connected to the upper end of the support base 101. The drive shaft 209 passes through the support 216 and extends to its outer side, causing the horizontal shaft 204 to rotate synchronously when the drying cylinder 203 rotates. A circular groove is opened on the side wall of the horizontal shaft 204, and a guide rod 205 is slidably connected in the circular groove. Three strip-shaped openings are evenly distributed on the outer wall of the horizontal shaft 204 inside the guide cylinder 201, and the side wall of the guide rod 205 is provided with positions corresponding to the three strip-shaped openings. A corresponding opening and closing material distribution unit is provided. The opening and closing material distribution unit includes a strip groove opened on the outer wall of the guide rod 205. A guide support rod 217 is rotatably connected in the strip groove. A sliding groove is opened on the side wall of the guide support rod 217 opposite to the guide rod 205. A slider 218 is slidably connected in the sliding groove. A movable block 219 is slidably connected in the strip groove. The slider 218 and the movable block 219 are fixedly connected by a compression spring 220. The inner wall of the guide cylinder 201 is... The guide cylinder 201 is conical, and its thickness decreases gradually from the outside to the inside, eventually becoming the same as the inner wall of the drying cylinder 203. The guide rod 217 can unfold from the strip-shaped opening to disperse the lithium battery material. A U-shaped mounting base 221 is fixedly connected to the outer wall of the guide rod 205. The U-shaped mounting base 221 is slidably sleeved on the outside of the horizontal shaft 204, and a fastening bolt for fixing to the horizontal shaft 204 is threaded onto the outer wall of the U-shaped mounting base 221.

[0042] Furthermore, a rotating shaft 207 is connected to the side wall of the horizontal shaft 204 via a flange 206. The rotating shaft 207 is correspondingly disposed inside the drying cylinder 203, and a drying unit that cooperates with the rotating shaft 207 is disposed inside the drying cylinder 203. The drying unit includes multiple first L-shaped support rods 222 fixedly connected to the outer side wall of the rotating shaft 207. Multiple strip plates 223 are evenly distributed on the inner wall of the drying cylinder 203. A circular chamber is disposed inside the strip plate 223, and an electric heating tube 224 is disposed inside the circular chamber. Two heat conduction ports communicating with the circular chamber are opened on the side wall of the strip plate 223, and a heat conduction plate 225 for heat conduction is fixedly connected inside the heat conduction port. A second L-shaped support rod 226 is fixedly connected to the side wall of the strip plate 223 away from the inner wall of the drying cylinder 203, and the second The L-shaped support rod 226 is oriented opposite to the first L-shaped support rod 222. Specifically, the bending angle of the first L-shaped support rod 222 is 135 degrees, and the angle of the second L-shaped support rod 226 is 90 degrees. The guide cylinder 201 and the drying cylinder 203 are inclined downwards, and the lithium battery material can slide downwards under the influence of gravity. Specifically, the lithium battery material is fully dried in the state of mutual cross movement of the first L-shaped support rod 222 and the second L-shaped support rod 226. That is, the drive motor 208, under the use of the transmission unit, makes the horizontal shaft 204 and the drying cylinder 203 move in opposite directions, thereby realizing the reverse movement of the first L-shaped support rod 222 and the second L-shaped support rod 226, which plays a role in fully and evenly drying the lithium battery material in the drying cylinder 203.

[0043] The drying cylinder 203 has a sealing end cap 301 rotatably connected to its outer wall. The drying cylinder 203 has a rotating seat 302 corresponding to the sealing end cap 301 on its outer wall, and the sealing end cap 301 is rotatably connected inside the rotating seat 302. The lower end of the sealing end cap 301 has a handle structure. The electric heating tube 224 is electrically connected to an external controller and power supply. This control process is existing technology and will not be described in detail here.

[0044] The drying method for drying equipment used in the repair of materials from decommissioned lithium iron phosphate batteries includes the following steps:

[0045] Step 1: The previously pre-dried retired lithium iron phosphate battery material is fed into the feed hopper 202 into the guide cylinder 201, and the drive motor 208 is started at the same time. Under the meshing of the cylindrical gear 211 and the gear ring 212, the drying cylinder 203 makes a circular motion. At the same time, the horizontal shaft 204 is rotated through the transmission of the belt 215, which drives the opening and closing material distribution unit inside the horizontal shaft 204 to perform material distribution and dispersion operation on the lithium battery material, so that the lithium battery material can be evenly transported from the guide cylinder 201 into the drying cylinder 203.

[0046] Step 2: After the lithium battery material is transported to the drying cylinder 203 under the action of gravity, the drying unit inside it can fully dry the lithium battery material. Specifically, the temperature inside the drying cylinder 203 is controlled by multiple electric heating tubes 224 and the controller to ensure that the drying cylinder 203 is at a suitable temperature and that the lithium battery material is fully dried in the state of the first L-shaped support rod 222 and the second L-shaped support rod 226 moving in a cross motion.

[0047] Step 3: The dried lithium battery material can be discharged from the sealed end cap 301 for subsequent processing. The opening and closing material distribution unit can be disassembled and cleaned after use. Specifically, the connection between the U-shaped mounting base 221 and the horizontal shaft 204 is disconnected, and the U-shaped mounting base 221 is pulled outward to disengage the guide rod 205 from the horizontal shaft 204. During use, the guide rod 205 is simply inserted into the side wall of the horizontal shaft 204 and the U-shaped mounting base 221 is fixed.

[0048] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A drying device for repairing materials in decommissioned lithium iron phosphate batteries, characterized in that, include: The support assembly (100) includes a rectangular support base (101), the lower end of which is fixedly connected to two parallel I-shaped steels (102), and the upper end of which is fixedly connected to an arc-shaped support seat and two roller support units. The drying assembly (200) includes a guide cylinder (201) fixedly connected to the upper end of the arc-shaped support base. The upper end of the guide cylinder (201) is fixedly connected to a feed pipe communicating with its interior, and the upper end of the feed pipe is connected to a feed hopper (202). A drying cylinder (203) is rotatably connected to the inner wall of the guide cylinder (201), and the drying cylinder (203) is connected to the upper side of two roller support units. The upper end of the support base (101) is provided with a drive unit connected to the drying cylinder (203). A horizontal shaft (204) is rotatably connected to the center of the side wall of the guide cylinder (201), and the horizontal shaft (204) is connected to the drive unit through a transmission unit. A circular groove is provided on the side wall of the horizontal shaft (204), and a guide rod (205) is slidably connected in the circular groove. Three strip-shaped openings are evenly distributed on the outer side wall of the horizontal shaft (204) on the inner side of the guide cylinder (201). A opening and closing material distribution unit corresponding to the position of the three strip-shaped openings is provided on the side wall of the guide rod (205). A rotating shaft (207) is connected to the side wall of the horizontal shaft (204) through a flange (206). The rotating shaft (207) is correspondingly arranged in the drying cylinder (203), and a drying unit that cooperates with the rotating shaft (207) is provided in the drying cylinder (203). The drying unit includes multiple first L-shaped support rods (222) fixedly connected to the outer side wall of the rotating shaft (207). The inner wall of the drying cylinder (203) is evenly connected with multiple strip plates (223). A circular chamber is provided inside the strip plate (223). An electric heating tube (224) is provided inside the circular chamber. Two heat conduction ports communicating with the circular chamber are opened on the side wall of the strip plate (223). A heat conduction plate (225) for conducting heat is fixedly connected inside the heat conduction port. A second L-shaped support rod (226) is fixedly connected to the side wall of the strip plate (223) away from the inner wall of the drying cylinder (203). The second L-shaped support rod (226) is arranged opposite to the first L-shaped support rod (222). The bending angle of the first L-shaped support rod (222) is 135 degrees. The angle of the second L-shaped support rod (226) is 90 degrees. The material guide cylinder (201) and the drying cylinder (203) are inclined downwards. The lithium battery material can slide downwards under the influence of gravity. The opening and closing material distribution unit includes a strip groove on the outer wall of the guide rod (205). A guide support rod (217) is rotatably connected in the strip groove. A sliding groove is provided on the side wall of the guide support rod (217) opposite to the guide rod (205). A slider (218) is slidably connected in the sliding groove. A movable block (219) is slidably connected in the strip groove. The slider (218) and the movable block (219) are fixedly connected by a compression spring (220). The inner wall of the guide cylinder (201) It is conical, and the thickness of the guide cylinder (201) decreases from the outside to the inside and eventually becomes the same as the inner wall of the drying cylinder (203). The guide rod (217) can be unfolded from the strip opening to disperse the lithium battery material. A U-shaped mounting seat (221) is fixedly connected to the outer wall of the guide rod (205). The U-shaped mounting seat (221) is slidably sleeved on the outside of the horizontal shaft (204), and a fastening bolt fixed to the horizontal shaft (204) is threaded on the outer wall of the U-shaped mounting seat (221). A sealing end cap (301) is rotatably connected to the outer wall of the drying cylinder (203).

2. The drying equipment for repairing materials in decommissioned lithium iron phosphate batteries according to claim 1, characterized in that: The roller support unit includes a U-shaped bracket (103) fixedly connected to the upper end of the support base (101), a roller (104) is rotatably connected inside the U-shaped bracket (103), and an annular block (105) corresponding to the position of the roller (104) is fixedly sleeved on the outer wall of the drying cylinder (203), and the roller (104) and the annular block (105) are in rolling connection.

3. The drying equipment for repairing materials in decommissioned lithium iron phosphate batteries according to claim 1, characterized in that: The drive unit includes a drive motor (208) fixedly connected to the upper end of the support base (101). The output end of the drive motor (208) is fixedly connected to a transmission shaft (209). The upper end of the support base (101) is fixedly connected to a gear frame (210). The transmission shaft (209) passes through the gear frame (210). A cylindrical gear (211) is fixedly sleeved on the outer wall of the transmission shaft (209) inside the gear frame (210). A gear ring (212) that meshes with the cylindrical gear (211) is fixedly sleeved on the outer wall of the drying cylinder (203).

4. The drying equipment for repairing materials in decommissioned lithium iron phosphate batteries according to claim 3, characterized in that: The transmission unit includes a first pulley (213) fixedly sleeved on the outer wall of the transmission shaft (209), a second pulley (214) fixedly sleeved on the outer wall of the horizontal shaft (204), the first pulley (213) and the second pulley (214) being connected by a belt (215), and a support (216) corresponding to the transmission shaft (209) fixedly connected to the upper end of the support base (101), the transmission shaft (209) passing through the support (216) and extending to its outer side.

5. The drying equipment for repairing materials in decommissioned lithium iron phosphate batteries according to claim 1, characterized in that: The outer wall of the drying cylinder (203) is provided with a rotating seat (302) corresponding to the sealing end cap (301), and the sealing end cap (301) is rotatably connected in the rotating seat (302). The lower end of the sealing end cap (301) is provided with a handle structure. The electric heating tube (224) is electrically connected to an external controller and power supply device.

6. The drying equipment for repairing materials in decommissioned lithium iron phosphate batteries according to claim 1, characterized in that: The drying method of the drying equipment used for repairing materials in decommissioned lithium iron phosphate batteries includes the following steps: Step 1: The previously pre-dried retired lithium iron phosphate battery material is fed into the feed hopper (202) into the guide cylinder (201), and the drive motor (208) is started at the same time. Under the meshing of the cylindrical gear (211) and the gear ring (212), the drying cylinder (203) makes a circular motion. At the same time, the horizontal shaft (204) is rotated by the transmission of the belt (215) and drives the opening and closing material distribution unit inside the horizontal shaft (204) to perform material distribution and dispersion operation on the lithium battery material, so that the lithium battery material can be evenly transported from the guide cylinder (201) into the drying cylinder (203). Step 2: After the lithium battery material is transported to the drying cylinder (203) under the action of gravity, the drying unit set inside it can fully dry the lithium battery material. Specifically, the temperature inside the drying cylinder (203) is controlled by multiple electric heating tubes (224) and the controller to ensure that the drying cylinder (203) is at a suitable temperature and that the lithium battery material is fully dried in the state of the first L-shaped support rod (222) and the second L-shaped support rod (226) moving in a cross motion. Step 3: The dried lithium battery material can be discharged from the sealed end cap (301) for subsequent processing. The opening and closing material distribution unit can be disassembled and cleaned after use. Specifically, the connection between the U-shaped mounting base (221) and the horizontal shaft (204) is disconnected, and the U-shaped mounting base (221) is pulled outward to disengage the guide rod (205) from the horizontal shaft (204). When in use, the guide rod (205) only needs to be inserted from the side wall of the horizontal shaft (204) and the U-shaped mounting base (221) needs to be fixed.

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