Lithium iron phosphate precursor presintering device

Abstract

The utility model discloses a lithium iron phosphate precursor presintering device, and relates to the technical field of lithium iron phosphate precursor processing. The device comprises a box body, a conveying frame with the two ends penetrating through a left port and a right port of the box body is arranged in the box body, two rollers of the conveying frame are sleeved with a metal conveying net, a plurality of conveying frames evenly distributed along the conveying face are arranged on the upper end face of the metal conveying net, a waste heat frame fixedly connected with the metal conveying net is arranged on the left portion of the box body, and a heater is fixed to the inner top of the box body. And a return pipe is arranged right above the box body. According to the lithium iron phosphate precursor sintering device, sintering molds of multiple groups of lithium iron phosphate precursors are uniformly conveyed through the conveying frame, it is guaranteed that the multiple groups of lithium iron phosphate precursors in the molds are stably preheated, meanwhile, the box body and the waste heat frame are communicated for use through the backflow pipe, waste heat can be utilized, the multiple groups of lithium iron phosphate precursors are heated in advance, and the utilization rate of the lithium iron phosphate precursors is improved. And the preheating efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to lithium iron phosphate precursor processing technical field, especially relate to a lithium iron phosphate precursor pre-sintering device. BACKGROUND

[0002] Lithium iron phosphate is widely used in electric vehicles and energy storage fields as lithium ion battery positive electrode material due to its high safety, long cycle life and low cost. The preparation and pre-sintering process of its precursor are crucial to the performance of the final product;

[0003] However, the existing pre-sintering device cannot uniformly and stably transport the molds of multiple groups of lithium iron phosphate precursors, and cannot quickly recycle the lithium iron phosphate precursors. In addition, the pre-sintering device cannot utilize the waste heat to preheat the lithium iron phosphate precursors, resulting in a long preheating time. Therefore, the lithium iron phosphate precursor pre-sintering device is provided to solve the above problems. SUMMARY

[0004] The lithium iron phosphate precursor pre-sintering device uniformly transports the sintering molds of multiple groups of lithium iron phosphate precursors through the conveying frame, ensures the stable preheating of the multiple groups of lithium iron phosphate precursors in the molds, and connects the tank and the waste heat frame using the reflux pipe to utilize the waste heat and preheat the multiple groups of lithium iron phosphate precursors, thereby improving the preheating efficiency.

[0005] To solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The lithium iron phosphate precursor pre-sintering device includes a tank, a conveying frame passing through the left and right ports of the tank, a metal conveying net on the two rollers of the conveying frame, a plurality of conveying frames on the upper end face of the metal conveying net, a waste heat frame fixedly connected to the left side of the tank, a heater fixed to the inner top of the tank, and a reflux pipe above the tank.

[0007] The utility model is further provided with a positioning frame fixed to the left and right sides of the tank, and the rollers of the conveying frame are connected to the corresponding positioning frames through bearings.

[0008] The utility model is further provided with a motor fixed to the inner bottom of the tank below the metal conveying net, and the rotating shaft end of the motor is drivingly connected to the rollers of the conveying frame through a synchronous belt.

[0009] The right end of the reflux pipe is connected to the inside of the tank, and a filter is fixed to the middle of the reflux pipe.

[0010] The utility model further sets up, the upper end surface of the waste heat frame outside is fixed with the suction pump, and the outlet end of suction pump is connected with the inside of waste heat frame, and the left end of reflux pipe is connected with the import end of suction pump.

[0011] The utility model further sets up, the top surface in waste heat frame of left side of suction pump is fixed with flow bar, and the front and rear parts of metal conveying net side are all fixed with synchronous bar.

[0012] The utility model further sets up, the surface wall of synchronous bar is equipped with multiple recesses that are evenly arranged along the edge, and the front and rear side walls of conveying frame are all fixed with positioning rod at the recess position.

[0013] The utility model has the advantages of the following:

[0014] The sintering mould of multiple groups of lithium iron phosphate precursors is placed into the conveying frame, the conveying frame is arranged at the upper end surface position of the metal conveying net, the positioning rod on the side wall of the conveying frame is placed in the corresponding recess, therefore, when the metal conveying net is circulated and moved, the metal conveying net will drive the synchronous bar to move, the synchronous bar drives the positioning rod to move through the recess, thereby synchronously controlling the movement of the conveying frame, and the conveying frame can pass through the inside position of the waste heat frame and the box in turn, so that the sintering mould of multiple groups of lithium iron phosphate precursors is synchronously conveyed, the multiple groups of lithium iron phosphate precursors in the mould are stably preheated, and the multiple groups of lithium iron phosphate precursors are conveniently taken and used.

[0015] The hot gas in the box is introduced into the waste heat frame from the inside of the reflux pipe, the hot gas in the waste heat frame preliminarily heats the lithium iron phosphate precursor in the conveying frame, so that the lithium iron phosphate precursor can reach the required temperature in advance when entering the box for preheating, and the preheating efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without paying the creative labor for the person skilled in the art.

[0017] Figure 1 It is the structure appearance schematic drawing of the utility model.

[0018] Figure 2 It is the overall structure section view of the utility model.

[0019] Figure 3 It is the structure combination drawing of the box and the conveying frame in the utility model.

[0020] Figure 4 This is a structural combination diagram of the conveyor frame and the metal conveyor mesh in this utility model.

[0021] Figure 5 This is a structural diagram of the conveyor frame in this utility model.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1-Box body, 101-Residual heat frame, 102-Heater, 103-Return pipe, 104-Filter, 105-Suction pump, 106-Flow bar, 107-Positioning frame, 2-Conveyor frame, 3-Metal conveyor mesh, 301-Synchronization bar, 302-Notch, 4-Conveyor frame, 401-Positioning rod, 5-Motor. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Example 1

[0025] Please see Figures 1 to 5 This utility model is a pre-sintering device for lithium iron phosphate precursors. The conveying frame 4 uniformly conveys multiple sets of lithium iron phosphate precursor sintering molds to ensure the stability of the preheating of multiple sets of lithium iron phosphate precursors in the mold. At the same time, the return pipe 103 connects the box 1 and the waste heat frame 101 to realize the utilization of waste heat and preheat multiple sets of lithium iron phosphate precursors, thereby improving the preheating efficiency.

[0026] Specifically, the housing 1 has a conveyor frame 2 with both ends passing through the left and right ports of the housing 1. A metal conveyor mesh 3 is fitted on the two rollers of the conveyor frame 2. Multiple conveyor frames 4 are evenly distributed along the conveying surface on the upper surface of the metal conveyor mesh 3. A waste heat frame 101 is fixedly connected to the metal conveyor mesh 1 on the left side of the housing 1. A heater 102 is fixed to the top of the housing 1. A return pipe 103 is set directly above the housing 1. A flow strip 106 is fixed to the top surface of the waste heat frame 101 located to the left of the suction pump 105. Synchronization strips 301 are fixed to the front and rear parts of the surface of the metal conveyor mesh 3. Multiple notches 302 are evenly distributed along the edge on the surface wall of the synchronization strip 301. Positioning rods 401 located at the notches 302 are fixed to the front and rear side walls of the conveyor frames 4.

[0027] The operation process of this embodiment is as follows: Using the above-described structure, multiple sets of sintering molds for lithium iron phosphate precursors are placed into the conveying frame 4, and the conveying frame 4 is positioned on the upper surface of the metal conveying mesh 3. The positioning rod 401 on the side wall of the conveying frame 4 is positioned in the corresponding recess 302. Therefore, when the metal conveying mesh 3 moves in a cycle, it drives the synchronization bar 301 to move. The synchronization bar 301 then synchronously drives the positioning rod 401 through the recess 302, thereby synchronously controlling the movement of the conveying frame 4. This allows the conveying frame 4 to pass sequentially through the waste heat frame 101 and the interior of the housing 1, and then through the waste heat frame... 101 initially heats the lithium iron phosphate precursor in the conveying frame 4, while heater 102 heats the inside of the box 1, thus thoroughly preheating the lithium iron phosphate precursor. When heater 102 continuously heats the inside of the box 1, the hot air inside the box 1 enters the waste heat frame 101 from the inside of the return pipe 103. Thus, the hot air inside the waste heat frame 101 initially heats the lithium iron phosphate precursor inside the conveying frame 4, ensuring that the lithium iron phosphate precursor can reach the required temperature in advance when it enters the box 1 for preheating, so that the lithium iron phosphate precursor can be stably in the crystal frame state after preheating. Example 2

[0028] Please see Figure 2 and Figure 3 Based on Example 1, the positioning frame 107 supports and limits the conveyor frame 2 to ensure the stable conveying of the metal conveyor mesh 3.

[0029] Specifically, positioning frames 107 are fixed on both the left and right sides of the box 1. The rollers of the conveyor frame 2 are connected to the corresponding positioning frames 107 through bearings. A motor 5 is fixed on the bottom surface of the box 1 located below the metal conveyor mesh 3. The shaft end of the motor 5 is connected to the rollers of the conveyor frame 2 through a synchronous belt.

[0030] The operation process of this embodiment is as follows: control the motor 5 to work, thereby driving the rollers on the conveyor frame 2 to rotate, and thereby driving the metal conveyor mesh 3 to circulate. The positioning frame 107 supports and positions the conveyor frame 2, and thereby supports and positions the metal conveyor mesh 3, ensuring that the metal conveyor mesh 3 stably transports the conveyor frame 4. Example 3

[0031] Please see Figure 2 Based on Example 1, the hot gas flowing through the return pipe 103 is filtered by filter 104.

[0032] Specifically, the right end of the return pipe 103 is connected to the interior of the housing 1, a filter 104 is fixed in the middle of the return pipe 103, a suction pump 105 is fixed on the upper surface of the waste heat frame 101, and the outlet end of the suction pump 105 is connected to the interior of the waste heat frame 101. The left end of the return pipe 103 is connected to the inlet end of the suction pump 105.

[0033] The operation process of this embodiment is as follows: When it is necessary to utilize the hot air inside the housing 1, the suction pump 105 is controlled to work. The suction pump 105 then draws the hot air inside the housing 1 through the return pipe 103 and transfers the hot air to the waste heat frame 101. In this way, the waste heat is used to preheat the lithium iron phosphate precursor inside the conveying frame 4. At the same time, after the hot air enters the return pipe 103, it passes through the filter 104, which filters out the tiny particles in the hot air.

[0034] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A lithium iron phosphate precursor pre-sintering apparatus, comprising a housing (1); characterized in that: The box (1) is equipped with a conveyor frame (2) with both ends passing through the left and right ports of the box (1). A metal conveyor mesh (3) is fitted on the two rollers of the conveyor frame (2). Multiple conveyor frames (4) are evenly distributed along the conveying surface on the upper surface of the metal conveyor mesh (3). A waste heat frame (101) is fixedly connected to the left side of the box (1). A heater (102) is fixed on the inner top of the box (1). A return pipe (103) is set directly above the box (1).

2. The lithium iron phosphate precursor pre-sintering apparatus according to claim 1, characterized in that, The left and right sides of the box (1) are fixed with positioning frames (107), and the rollers of the conveying frame (2) are connected to the corresponding positioning frames (107) through bearings.

3. The lithium iron phosphate precursor pre-sintering apparatus according to claim 2, characterized in that, A motor (5) is fixed on the bottom surface of the box (1) located below the metal conveyor mesh (3). The shaft end of the motor (5) is connected to the roller of the conveyor frame (2) via a synchronous belt.

4. The lithium iron phosphate precursor pre-sintering apparatus according to claim 1, characterized in that, The right end of the return pipe (103) is connected to the interior of the box (1), and a filter (104) is fixed in the middle of the return pipe (103).

5. The lithium iron phosphate precursor pre-sintering apparatus according to claim 4, characterized in that, A suction pump (105) is fixed on the upper surface of the waste heat frame (101), and the outlet end of the suction pump (105) is connected to the interior of the waste heat frame (101). The left end of the return pipe (103) is connected to the inlet end of the suction pump (105).

6. The lithium iron phosphate precursor pre-sintering apparatus according to claim 5, characterized in that, A flow strip (106) is fixed on the top surface of the waste heat frame (101) located to the left of the suction pump (105), and a synchronization strip (301) is fixed on the front and rear parts of the surface of the metal conveyor mesh (3).

7. The lithium iron phosphate precursor pre-sintering apparatus according to claim 6, characterized in that, The surface of the synchronization bar (301) has multiple recesses (302) evenly distributed along the edge, and the front and rear side walls of the conveying frame (4) are fixed with positioning rods (401) located in the recesses (302).

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