Efficient preparation device and preparation process of lithium manganese iron phosphate composite electrode material

Abstract

The invention discloses an efficient preparation device and preparation process of a lithium manganese iron phosphate composite electrode material, and relates to the technical field of composite electrode material preparation, the efficient preparation device comprises a reaction tank, a sealing cover is hinged to the reaction tank, an equivalent discharging mechanism is arranged on the sealing cover, and a discharging amount adjustable mechanism is arranged on one side of the equivalent discharging mechanism; the driving stability of the equipment can be effectively guaranteed through the vertical design of the threaded sliding rails on the synchronizing shaft and the tooth grooves in the driving disc, namely the design that the threaded sliding rails are perpendicular to the driving disc in the working process, and specifically, when the driving disc rotates under the cooperation of the threaded sliding rails and the tooth grooves of the synchronizing shaft, the driving stability of the equipment can be effectively guaranteed; different from an existing design that a driver is directly arranged on the connecting shaft, the design that the rotating driving disc drives the separation blades to rotate through the connecting shaft can effectively avoid the situation that a motor for driving the connecting shaft is damaged by the weight of materials borne in the split charging groove, the stability of the device is improved, and the service life of the device is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of composite electrode material preparation, and in particular to a highly efficient preparation device and preparation process for a lithium manganese iron phosphate composite electrode material. Background Art

[0002] As the global demand for clean energy and sustainable development continues to grow, lithium-ion batteries, as a highly efficient energy storage device, play a vital role in electric vehicles, portable electronic devices, energy storage systems, etc. Electrode materials are one of the key factors that determine the performance of lithium-ion batteries, among which lithium manganese iron phosphate composite electrode materials have attracted much attention due to their unique advantages.

[0003] There are many problems in the preparation process of lithium iron manganese phosphate composite electrode materials in the prior art. On the one hand, all raw materials are usually directly put into the reaction tank during preparation. This operation method makes it difficult to achieve precise control of the addition of different raw materials. Since the roles and proportions of different raw materials in the reaction process are strictly required, directly putting all of them in will not only easily lead to uneven mixing of the raw materials, but also affect the sufficiency and consistency of the reaction, and increase the risk of unstable product performance.

[0004] On the other hand, when attempting to perform equal-volume packaging and delivery, the existing device is unable to flexibly adjust the packaging volume of the equal-volume device according to changes in the proportion of raw materials, resulting in the inability to quickly and accurately adjust the delivery strategy when faced with different formulation requirements of manganese iron phosphate lithium composite electrode materials. For example, when the proportions of raw materials such as manganese, iron, phosphorus, and lithium change, the existing equal-volume packaging equipment is unable to automatically adapt to such changes and still delivers them in a fixed packaging volume, which greatly limits the flexibility and adaptability of the preparation process. This limitation not only increases the workload and difficulty of manual adjustment, but also easily leads to a decline in product quality due to human errors.

[0005] Therefore, an efficient preparation device and preparation process of lithium manganese iron phosphate composite electrode material are proposed to solve the above problems. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides an efficient preparation device and preparation process for a lithium manganese iron phosphate composite electrode material to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions: an efficient preparation device and preparation process of lithium manganese iron phosphate composite electrode material, comprising: a reaction tank, a sealing cover is hinged on the reaction tank, an equal amount of material discharge mechanism is arranged on the sealing cover, and a material discharge amount adjustable mechanism is arranged on one side of the equal amount of material discharge mechanism;

[0008] The equal amount feeding mechanism is used to feed the lithium manganese iron phosphate material in equal amounts into the reaction tank to prepare the composite electrode material;

[0009] The feed amount adjustable mechanism is used to adjust the amount of lithium manganese iron phosphate fed according to the requirements of composite electrode material preparation.

[0010] Preferably, the equal amount unloading mechanism includes a driving motor, the driving motor is fixedly connected to the sealing cover, the end of the driving motor away from the sealing cover is fixedly connected to the output shaft, the end of the output shaft away from the driving motor is fixedly connected to the synchronous shaft, the outer ring of the synchronous shaft is fixedly connected to the threaded slide rail, a driving disk is provided on one side of the threaded slide rail, the outer ring of the driving disk is provided with a plurality of teeth grooves, and the teeth grooves are meshingly connected to the threaded slide rail.

[0011] Preferably, the equal amount unloading mechanism also includes an auxiliary cover, which is arranged on the side of the driving disk away from the threaded slide rail, a unloading hopper is fixedly connected to the bottom of the auxiliary cover, the unloading hopper is fixedly connected to the sealing cover, a connecting shaft is fixedly connected to the middle of the driving disk, the connecting shaft is rotatably connected in the auxiliary cover, a plurality of dividing blades are fixedly connected to the outer ring of the connecting shaft, a filling groove is opened between two adjacent dividing blades, and an upper hopper is fixedly connected to the top of the auxiliary cover.

[0012] Preferably, the adjustable feeding amount mechanism includes an auxiliary arc piece, the auxiliary arc piece is fixedly connected in the auxiliary cover, the end of the auxiliary arc piece away from the separating blade is fixedly connected to a positioning body, five inner cavities are opened in the positioning body, an auxiliary spring is fixedly connected in the inner cavity, the end of the auxiliary spring away from the positioning body is fixedly connected to an adjusting block, and an electrically controlled air pump is arranged on a side of the positioning body away from the adjusting block.

[0013] Preferably, the driving motor is electrically connected to an external controller, and the threaded slide rail is a track in a spiral ascending shape.

[0014] Preferably, a plurality of dividing blades are equidistantly arranged around the center of the connecting shaft, the number of the dividing blades is consistent with the number of the tooth grooves, and the upper hopper is connected with the filling trough and the lower hopper.

[0015] Preferably, the regulating block is slidably matched with the dispensing tank, and the air pipe of the electric-controlled air pump extends into the inner cavity.

[0016] The efficient preparation process of lithium manganese iron phosphate composite electrode material includes the following steps:

[0017] Step 1: Raw material preparation:

[0018] Accurately weigh a certain proportion of manganese source compound;

[0019] Select appropriate iron source compound;

[0020] preparing a lithium source compound;

[0021] Identify phosphorus source compounds;

[0022] Add appropriate amount of carbon source;

[0023] Step 2: Mixing process:

[0024] The above raw materials are respectively put into the upper hopper, and then separated by the dividing blades, divided into the sub-filling tank and added into the reaction tank, and a proper amount of solvent is added. The moving distance between the regulating block and the sub-filling tank can be adjusted according to the volume of the raw materials to adjust the size of the use space of the sub-filling tank, and then the raw materials are stirred and mixed to make them fully uniform;

[0025] Step 3: Hydrothermal reaction:

[0026] The mixed materials are transferred to a hydrothermal reactor to carry out a hydrothermal reaction at a certain temperature and pressure;

[0027] Through the hydrothermal reaction, the raw materials are fully reacted to form a preliminary lithium manganese iron phosphate composite precursor;

[0028] Step 4: Drying:

[0029] The product after the hydrothermal reaction is filtered and washed to remove impurities, and then the product is dried;

[0030] Step 5: Sintering treatment:

[0031] The dried precursor is placed in a sintering furnace and sintered under a specific atmosphere;

[0032] Step 6: Post-processing:

[0033] The sintered product is ground, screened and processed to obtain a lithium manganese iron phosphate composite electrode material.

[0034] Compared with the prior art, the present invention provides an efficient preparation device and preparation process of lithium manganese iron phosphate composite electrode material, which has the following beneficial effects:

[0035] 1. Through the design of the equal amount feeding mechanism, the raw materials can be effectively and accurately controlled to be fed when preparing lithium manganese iron phosphate composite electrode materials, ensuring the sufficiency and consistency of subsequent reactions; specifically, as the materials are fed from the upper hopper, the materials will enter the filling tank, so as to carry out the equal transfer of multiple raw materials. This is different from directly feeding all the raw materials into the reaction tank during preparation, which makes it difficult to achieve accurate control of the feeding of different raw materials. It can also effectively avoid the uneven mixing of raw materials caused by direct feeding, affecting the sufficiency and consistency of the reaction, and failing to accurately grasp the actual amount of various raw materials, which increases the risk of unstable product performance.

[0036] 2. The vertical design of the threaded guide rail on the synchronous shaft and the tooth groove on the driving disk, that is, the threaded guide rail and the driving disk are vertical when working, can effectively ensure the driving stability of the equipment. Specifically, when the synchronous shaft rotates the driving disk through the cooperation of the threaded guide rail and the tooth groove, the rotating driving disk will drive the dividing blades to rotate through the connecting shaft. This design is different from the existing design of directly placing the drive on the connecting shaft. It can effectively avoid the weight of the material supported in the filling tank from damaging the motor driving the connecting shaft, thereby improving the stability of the device and extending the service life of the device.

[0037] 3. Through the design of the adjustable feeding amount mechanism, the size of the filling tank can be auxiliary adjusted on the basis of the equal feeding ratio of the equal feeding mechanism, and the amount of material added each time can be further changed, so that non-full warehouse material filling can be carried out, thereby improving the perfection of equal material filling; specifically, by changing the position of the adjustment block in the filling tank, the amount of material transferred each time in the filling tank can be changed. This is different from the existing device that cannot flexibly adjust the filling amount of the equal amount device according to the change in the proportion of raw materials, resulting in the inability to quickly and accurately adjust the feeding strategy when facing different formulation requirements of manganese iron phosphate lithium composite electrode materials. For example, when the proportion of raw materials such as manganese, iron, phosphorus, and lithium changes, the existing equal amount filling equipment cannot automatically adapt to such changes, and still feeds with a fixed filling amount, which greatly limits the flexibility and adaptability of the preparation process. That is, the existence of this design can effectively reduce the limitations of the use of the device and improve the flexibility and adaptability of the preparation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0039] Figure 2 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0040] Figure 3 This is a structural diagram of the equal amount feeding mechanism of the present invention;

[0041] Figure 4This is a structural diagram of the equal amount feeding mechanism and the feeding amount adjustable mechanism of the present invention;

[0042] Figure 5 For the present invention Figure 4 The structure diagram at B is enlarged;

[0043] Figure 6 This is a disassembled structural diagram of the equal amount feeding mechanism and the feeding amount adjustable mechanism of the present invention;

[0044] Figure 7 It is a front structural diagram of the equal amount feeding mechanism of the present invention.

[0045] In the figure:

[0046] 1. Reaction tank; 11. Sealing cover;

[0047] 2. Equal amount unloading mechanism; 21. Driving motor; 22. Output shaft; 23. Synchronous shaft; 24. Threaded slide rail; 25. Driving plate; 26. Tooth groove; 27. Auxiliary cover; 28. Unloading hopper; 29. ​​Connecting shaft; 210. Separating blade; 211. Dispensing tank; 212. Loading hopper;

[0048] 3. Adjustable feeding amount mechanism; 31. Auxiliary arc piece; 32. Positioning body; 33. Inner cavity; 34. Auxiliary spring; 35. Adjusting block; 36. Electric-controlled air pump. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0050] The present invention is further described in detail below based on the accompanying drawings and embodiments.

[0051] Embodiment 1

[0052] Please refer to Figures 1 to 4 As shown:

[0053] In order to solve the problems mentioned in the technical solution, the embodiment of the present application provides an efficient preparation device of lithium manganese iron phosphate composite electrode material, including: a reaction tank 1, a sealing cover 11 is hinged on the reaction tank 1, an equal amount of feeding mechanism 2 is arranged on the sealing cover 11, and a feeding amount adjustable mechanism 3 is arranged on one side of the equal amount of feeding mechanism 2;

[0054] The equal amount feeding mechanism 2 is used to pack the lithium manganese iron phosphate material in equal amounts and put it into the reaction tank 1 to prepare the composite electrode material. The equal amount feeding mechanism 2 includes a driving motor 21, which is electrically connected to an external controller. The driving motor 21 is fixedly connected to the sealing cover 11. The end of the driving motor 21 away from the sealing cover 11 is fixedly connected to an output shaft 22, and the end of the output shaft 22 away from the driving motor 21 is fixedly connected to a synchronous shaft 23. The outer ring of the synchronous shaft 23 is fixedly connected to a threaded slide rail 24. The threaded slide rail 24 is mainly used to rotate and drive the tooth groove 26 on the driving disk 25 to deflect. The threaded slide rail 24 is a spiral ascending track. A driving disk 25 is arranged on one side of the threaded slide rail 24. The driving disk 25 is mainly used to intermittently rotate and drive the connecting shaft 29 to rotate. The outer ring of the driving disk 25 is provided with a plurality of tooth grooves 26, and the tooth grooves 26 are meshingly connected to the threaded slide rail 24.

[0055] The equal amount unloading mechanism 2 also includes an auxiliary cover 27, which is arranged on a side of the driving disc 25 away from the threaded slide rail 24. A lower hopper 28 is fixedly connected to the lower part of the auxiliary cover 27, and the lower hopper 28 is fixedly connected to the sealing cover 11. A connecting shaft 29 is fixedly connected to the middle part of the driving disc 25. The connecting shaft 29 rotates to drive the sub-filling groove 211 to rotate intermittently, and then the raw materials in the sub-filling groove 211 are put into the reaction tank 1 through the lower hopper 28. The connecting shaft 29 is rotatably connected in the auxiliary cover 27. A plurality of partition blades 210 are fixedly connected to the outer ring of the connecting shaft 29. A plurality of partition blades 210 are equidistantly arranged around the center of the connecting shaft 29. The number of the partition blades 210 is consistent with the number of the tooth grooves 26. A sub-filling groove 211 is provided between two adjacent partition blades 210. An upper hopper 212 is fixedly connected to the upper part of the auxiliary cover 27, and the upper hopper 212 is connected to the sub-filling groove 211 and the lower hopper 28.

[0056] For further examples, please refer to Figures 4 to 7 As shown:

[0057] The adjustable feeding amount mechanism 3 is used to adjust the feeding amount of lithium iron manganese phosphate according to the requirements of the preparation of the composite electrode material. The adjustable feeding amount mechanism 3 includes an auxiliary arc piece 31, which is fixedly connected to the auxiliary cover 27. The end of the auxiliary arc piece 31 away from the dividing blade 210 is fixedly connected to a positioning body 32. Five inner cavities 33 are opened in the positioning body 32. An auxiliary spring 34 is fixedly connected in the inner cavity 33. The end of the auxiliary spring 34 away from the positioning body 32 is fixedly connected to an adjustment block 35. The adjustment block 35 is mainly used to move and change the capacity of the filling tank 211. The adjustment block 35 is slidably adapted to the filling tank 211. An electrically controlled air pump 36 is arranged on the side of the positioning body 32 away from the adjustment block 35. The electrically controlled air pump 36 is mainly used to transport gas to form a high pressure in the inner cavity 33 to push the adjustment block 35 to move into the filling tank 211 to change the volume capacity of the filling tank 211. The air pipe of the electrically controlled air pump 36 extends into the inner cavity 33.

[0058] Embodiment 2

[0059] The efficient preparation process of lithium manganese iron phosphate composite electrode material includes the following steps:

[0060] Step 1: Raw material preparation:

[0061] Accurately weigh a certain proportion of manganese source compound;

[0062] Select appropriate iron source compound;

[0063] preparing a lithium source compound;

[0064] Identify phosphorus source compounds;

[0065] Add appropriate amount of carbon source;

[0066] Step 2: Mixing process:

[0067] The above raw materials are respectively put into the upper hopper 212, and then separated by the dividing blade 210, divided into the sub-filling tank 211 and added to the reaction tank 1, and a proper amount of solvent is added. The moving distance between the regulating block 35 and the sub-filling tank 211 can be adjusted according to the volume of the raw materials to adjust the size of the use space of the sub-filling tank 211, and then the raw materials are stirred and mixed to make them fully uniform;

[0068] Step 3: Hydrothermal reaction:

[0069] The mixed materials are transferred to a hydrothermal reactor to carry out a hydrothermal reaction at a certain temperature and pressure;

[0070] Through the hydrothermal reaction, the raw materials are fully reacted to form a preliminary lithium manganese iron phosphate composite precursor;

[0071] Step 4: Drying:

[0072] The product after the hydrothermal reaction is filtered and washed to remove impurities, and then the product is dried;

[0073] Step 5: Sintering treatment:

[0074] The dried precursor is placed in a sintering furnace and sintered under a specific atmosphere;

[0075] Step 6: Post-processing:

[0076] The sintered product is ground, screened and processed to obtain a lithium manganese iron phosphate composite electrode material.

[0077] Everything in the above example works like this:

[0078] The following is the working process of the equal amount feeding mechanism 2 for feeding equal amounts of lithium manganese iron phosphate materials into the reaction tank 1 for preparing the composite electrode material:

[0079] When in use, compounds such as phosphorus source, acid source, manganese source, iron source, lithium source, etc. are respectively put into the upper hopper 212, and the driving motor 21 is started. The driving motor 21 drives the output shaft 22 to rotate. When the output shaft 22 rotates, the synchronous shaft 23 fixedly connected thereto is prompted to rotate synchronously. When the synchronous shaft 23 rotates, under the influence of the threaded slide rail 24 with a threaded ascending shape on the synchronous shaft 23, the rotation of the synchronous shaft 23 drives the threaded slide rail 24 to rotate. When the threaded slide rail 24 rotates, the driving disc 25 slidably engaged with the threaded slide rail 24 gradually disengages from the threaded slide rail 24 during the threaded rotation of the threaded slide rail 24, and the tooth groove 26 slidably engaged with the upper end of the threaded slide rail 24 gradually slides to the upper end of the threaded slide rail 24. In the process of replacement and movement between the tooth grooves 26, the driving disc 25 is pushed to rotate. Further, When the driving disk 25 rotates, the connecting shaft 29 at the concentric circle in the middle of the driving disk 25 rotates synchronously, and under this rotation, the filling groove 211 on the outer ring of the connecting shaft 29 rotates synchronously, and the chemical raw materials put into the upper hopper 212 flow into the filling groove 211 formed between the two dividing blades 210. In the process of the connecting shaft 29 driving the dividing blades 210 to rotate, the filling groove 211 rotates synchronously. Therefore, under the action of rotation, the upper hopper 212 with an equal amount of chemical raw materials located just below the upper hopper 212 is rotated to just above the upper hopper 212. Under the action of gravity, the same raw materials are put into the reaction tank 1 in batches according to the proportion, so that the same raw materials packed in the filling groove 211 are put into the reaction tank 1 in equal amounts, and are fully mixed with other raw materials and solvents, so that the amount of the same raw materials put into the reaction tank 1 each time is the same, ensuring the consistency of subsequent reactions;

[0080] Through the design of the equal amount feeding mechanism 2, the raw materials can be effectively and accurately controlled to be fed when preparing the lithium manganese iron phosphate composite electrode material, ensuring the sufficiency and consistency of the subsequent reaction; specifically, as the material is fed from the upper hopper 212, the material will enter the filling tank 211, so as to carry out the equal amount transfer of multiple raw materials. This is different from directly feeding all the raw materials into the reaction tank 1 during preparation, which makes it difficult to achieve accurate control of the feeding of different raw materials. It can also effectively avoid the uneven mixing of raw materials caused by direct feeding, affecting the sufficiency and consistency of the reaction, and being unable to accurately grasp the actual amount of various raw materials, which increases the risk of unstable product performance.

[0081] Through the vertical design of the threaded slide 24 on the synchronous shaft 23 and the tooth groove 26 on the driving disk 25, that is, the threaded slide 24 and the driving disk 25 are vertical during operation, the driving stability of the equipment can be effectively guaranteed. Specifically, when the synchronous shaft 23 rotates the driving disk 25 under the cooperation of the threaded slide 24 and the tooth groove 26, the rotating driving disk 25 will drive the dividing blade 210 to rotate through the connecting shaft 29. This design is different from the existing design of directly placing the drive on the connecting shaft 29, and can effectively avoid the situation where the weight of the material supported in the filling tank 211 causes damage to the motor of the driving connecting shaft 29, thereby improving the stability of the device and extending the service life of the device.

[0082] Please refer to the above working process Figures 1 to 4 .

[0083] The following is the working process of the adjustable feeding amount mechanism 3 for adjusting the amount of lithium manganese iron phosphate according to the requirements of the preparation of the composite electrode material:

[0084] During use, when the filling tank 211 divides the raw materials stored in the upper hopper 212 into equal amounts, the raw material ratio changes. When the equal amount of filling needs to be changed, the electric control air pump 36 is started to transport gas to the inner cavity 33, and the air pressure in the inner cavity 33 increases. In the process of the gradual increase of the air pressure in the inner cavity 33, the adjustment block 35 is pushed to move in the direction of the partition blade 210, and the auxiliary spring 34 is stretched and then fits with the surfaces of two adjacent partition blades 210. When the adjustment block 35 moves gradually, the space of the filling tank 211 is synchronously reduced. Under the effect of the reduction of the space of the filling tank 211, the volume of the raw materials falling from the upper hopper 212 to the filling tank 211 is the same. The size of the sub-filling tank 211 is reduced due to the reduction of the sub-filling tank 211, so that on the basis of equal amount of material ratio, the size of the sub-filling tank 211 is adjusted auxiliaryly, and the amount of material added each time is further changed, so that non-full warehouse material filling can be performed, and the raw materials are added according to different lithium manganese iron phosphate, and the gas volume transported into the inner cavity 33 by the electronically controlled air pump 36 is controlled, and then under the effect of changing the air pressure in the inner cavity 33, the distance that the regulating block 35 moves toward the sub-filling tank 211 is controlled to adjust the sub-filling amount of equal amount packaging, so as to ensure that relatively accurate equal amount delivery can be achieved under different conditions, and the electronically controlled air pump 36 can be started separately according to demand to adjust the volume in a single sub-filling tank 211;

[0085] Through the design of the adjustable feeding amount mechanism 3, the size of the filling tank 211 can be auxiliary adjusted on the basis of the equal amount of material ratio of the equal amount feeding mechanism 2, and the amount of material added each time can be further changed, so that non-full warehouse material filling can be carried out, thereby improving the perfection of equal amount filling of materials; specifically, by changing the position of the adjustment block 35 in the filling tank 211, the amount of material transferred each time by the filling tank 211 can be changed. This is different from the existing device that cannot flexibly adjust the filling amount of the equal amount device according to the change in the proportion of raw materials, resulting in the situation that the feeding strategy cannot be adjusted quickly and accurately when facing different formulation requirements of manganese iron phosphate lithium composite electrode materials. For example, when the proportion of raw materials such as manganese, iron, phosphorus, and lithium changes, the existing equal amount filling equipment cannot automatically adapt to such changes, and still feeds with a fixed filling amount, which greatly limits the flexibility and adaptability of the preparation process. That is, the existence of this design can effectively reduce the limitations of the use of the device and improve the flexibility and adaptability of the preparation process.

[0086] Please refer to the above working process Figures 4 to 7 .

[0087] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0088] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An efficient preparation device for lithium manganese iron phosphate composite electrode material, comprising: A reaction tank (1), wherein a sealing cover (11) is hingedly connected to the reaction tank (1), characterized in that an equal amount of material discharge mechanism (2) is provided on the sealing cover (11), and a material discharge amount adjustable mechanism (3) is provided on one side of the equal amount of material discharge mechanism (2); The equal amount feeding mechanism (2) is used to pack the lithium manganese iron phosphate material and feed it into the reaction tank (1) in equal amounts to prepare the composite electrode material; The feed amount adjustable mechanism (3) is used to adjust the amount of lithium manganese iron phosphate fed according to the requirements of composite electrode material preparation.

2. The efficient preparation device of a lithium iron manganese phosphate composite electrode material according to claim 1, characterized in that: The equal amount unloading mechanism (2) comprises a driving motor (21), the driving motor (21) is fixedly connected to the sealing cover (11), one end of the driving motor (21) away from the sealing cover (11) is fixedly connected to an output shaft (22), one end of the output shaft (22) away from the driving motor (21) is fixedly connected to a synchronous shaft (23), the outer ring of the synchronous shaft (23) is fixedly connected to a threaded slide rail (24), one side of the threaded slide rail (24) is provided with a driving disk (25), the outer ring of the driving disk (25) is provided with a plurality of tooth grooves (26), and the tooth grooves (26) are meshingly connected to the threaded slide rail (24).

3. The efficient preparation device of a lithium iron manganese phosphate composite electrode material according to claim 2, characterized in that: The equal amount unloading mechanism (2) further comprises an auxiliary cover (27), the auxiliary cover (27) being arranged on a side of the driving disc (25) away from the threaded slide rail (24), a lower part of the auxiliary cover (27) being fixedly connected to a unloading hopper (28), the lower part of the hopper (28) being fixedly connected to the sealing cover (11), a connecting shaft (29) being fixedly connected to the middle part of the driving disc (25), the connecting shaft (29) being rotatably connected in the auxiliary cover (27), a plurality of partition blades (210) being fixedly connected to the outer ring of the connecting shaft (29), a dispensing groove (211) being provided between two adjacent partition blades (210), and a loading hopper (212) being fixedly connected to the upper part of the auxiliary cover (27).

4. The efficient preparation device of a lithium iron manganese phosphate composite electrode material according to claim 1, characterized in that: The adjustable feeding amount mechanism (3) comprises an auxiliary arc piece (31), the auxiliary arc piece (31) is fixedly connected to the auxiliary cover (27), one end of the auxiliary arc piece (31) away from the dividing blade (210) is fixedly connected to a positioning body (32), five inner cavities (33) are provided in the positioning body (32), an auxiliary spring (34) is fixedly connected in the inner cavity (33), one end of the auxiliary spring (34) away from the positioning body (32) is fixedly connected to an adjustment block (35), and a side of the positioning body (32) away from the adjustment block (35) is provided with an electric control air pump (36).

5. The efficient preparation device of a lithium iron manganese phosphate composite electrode material according to claim 2, characterized in that: The driving motor (21) is electrically connected to an external controller, and the threaded slide rail (24) is a track in a spiral ascending shape.

6. The efficient preparation device of a lithium iron manganese phosphate composite electrode material according to claim 3, characterized in that: A plurality of the partition blades (210) are equidistantly arranged around the center of the connecting shaft (29), and the number of the partition blades (210) is consistent with the number of the tooth grooves (26). The upper hopper (212) is connected to the dispensing tank (211) and the lower hopper (28).

7. The efficient preparation device of a lithium iron manganese phosphate composite electrode material according to claim 4, characterized in that: The regulating block (35) is slidably matched with the dispensing tank (211), and the air pipe of the electric-controlled air pump (36) extends into the inner cavity (33).

8. An efficient preparation process for lithium iron manganese phosphate composite electrode material, applied to an efficient preparation device for lithium iron manganese phosphate composite electrode material as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Raw material preparation: Accurately weigh a certain proportion of manganese source compound; Select appropriate iron source compound; preparing a lithium source compound; Identify phosphorus source compounds; Add appropriate amount of carbon source; Step 2: Mixing process: The raw materials prepared in step 1 are respectively put into the upper hopper (212), and then separated by the separation blade (210), divided into the sub-filling tank (211) and added to the reaction tank (1), and a proper amount of solvent is added. The moving distance between the regulating block (35) and the sub-filling tank (211) can be adjusted according to the volume of the raw materials to adjust the size of the use space of the sub-filling tank (211), and then the raw materials are stirred and mixed to make them fully uniform; Step 3: Hydrothermal reaction: The mixed materials are transferred to a hydrothermal reactor to carry out a hydrothermal reaction at a certain temperature and pressure; Through the hydrothermal reaction, the raw materials are fully reacted to form a preliminary lithium manganese iron phosphate composite precursor; Step 4: Drying: The product after the hydrothermal reaction is filtered and washed to remove impurities, and then the product is dried; Step 5: Sintering treatment: The dried precursor is placed in a sintering furnace and sintered under a specific atmosphere; Step 6: Post-processing: The sintered product is ground, screened and processed to obtain a lithium manganese iron phosphate composite electrode material.

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