A drying device for manufacturing energy storage batteries

Abstract

The present application relates to the technical field of heating and drying equipment, and discloses a drying equipment for manufacturing energy storage batteries, including a drying drum, a group of legs are respectively provided on the left and right sides of the outer surface of the drying drum, and a pulley component is fixedly sleeved in the middle of the outer surface of the drying drum, a feed hopper is provided at the top of the right leg, and a connecting slot is provided at the right side of the drying drum and at a position corresponding to the feed hopper, and a hot air component is provided at the right end of the drying drum. The present application provides a drying equipment for manufacturing energy storage batteries, and the arrangement of the drying drum and the hot air component can "cut" the positive electrode material entering the inner cavity of the drying drum from the feed hopper as the drying drum rotates to prevent it from agglomerating, and at the same time, under the action of the reflux rib plate, when the positive electrode material is less dry and heavier, its residence time in the inner cavity of the drying drum can be increased.

Description

Technical Field

[0001] The present application relates to the technical field of heating and drying equipment, and in particular to a drying equipment for manufacturing energy storage batteries. Background Art

[0002] In the production and processing of energy storage batteries, inorganic active substances such as oxides, sulfides, and halides containing lithium are often used as positive electrode materials. In the process of processing these positive electrode materials, in order to ensure the stability and reliability of their performance, they need to be dried to eliminate the moisture contained therein;

[0003] Among them, fluidized bed drying is the main drying technology for drying bulk materials. However, when the existing fluidized bed is used to dry positive electrode materials, positive electrode materials with high viscosity are very likely to form block structures and adhere to the orifice plate, which leads to the outer layer of the block-structured positive electrode material being very likely to undergo quality changes due to high-temperature baking, and the inner layer being unable to complete the drying operation due to lack of contact with hot air. As a result, the fluidized bed has a poor drying effect on positive electrode materials with high viscosity, and there is great uncertainty.

[0004] Therefore, there is an urgent need for a drying device for positive electrode materials of energy storage batteries to solve the defects of the above-mentioned existing fluidized drying bed when drying positive electrode materials with high viscosity. Summary of the invention

[0005] The present application proposes a drying device for manufacturing energy storage batteries, which can effectively dry positive electrode materials with high viscosity to prevent uneven drying of the inner and outer layers of the positive electrode materials due to agglomeration, and has the advantages of good drying effect and high stability and reliability. It is used to solve the problem that when the existing fluidized drying bed is drying the positive electrode materials, the positive electrode materials with high viscosity are very likely to form a block structure and adhere to the orifice plate, which leads to the outer layer of the positive electrode materials with block structure being very likely to undergo quality changes due to high-temperature baking, and the inner layer cannot complete the drying operation due to lack of contact with hot air, resulting in the poor drying effect of the fluidized drying bed for the positive electrode materials with high viscosity.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a drying device for manufacturing energy storage batteries, comprising a drying drum for drying positive electrode materials with high viscosity, a group of legs are respectively provided on the left and right sides of the outer surface of the drying drum, and a pulley component connected to the external power mechanism is fixedly sleeved in the middle of the outer surface of the drying drum, and then under the transmission action of the pulley component, the drying drum can be driven by the external power mechanism to rotate accordingly, and a feed hopper for conveying positive electrode materials into the drying drum is provided at the top of the right leg, and three groups of connecting slots arranged in a circular array are opened in the right side of the drying drum and at a position corresponding to the feed hopper, and then in the process of conveying the positive electrode materials, as the drying drum rotates, the connecting slots thereon can "cut" the positive electrode materials being conveyed to prevent them from forming lumps due to excessive viscosity, and a hot air component is provided at the right end of the drying drum, and hot air is conveyed into the inner cavity of the drying drum through the hot air component to dry the positive electrode materials therein.

[0007] Furthermore, the inner wall of the drying drum is provided with a spiral reflux rib plate, and the reflux rib plate can transport the positive electrode material in the drying drum to the right side as the drying drum rotates;

[0008] Furthermore, under the action of the hot air from the hot air component, the positive electrode material in the inner cavity of the drying drum can be transported to the left. When the positive electrode material is less dry and heavier, it comes into contact with the inner wall of the drying drum under the action of the centrifugal force of the rotation of the drying drum, and is transported in the reverse direction to increase its residence time in the inner cavity of the drying drum. When the positive electrode material is more dry and lighter, it is discharged through the left side of the drying drum along with the flow of the hot air from the hot air component and enters the next process.

[0009] Furthermore, a semi-open guide plate is provided on the inner wall of the drying drum at a position corresponding to the connecting slot, and the opening direction of the guide plate is the same as the rotation direction of the drying drum, thereby effectively preventing the hot air generated in the hot air assembly from flowing from the connecting slot to the feed hopper.

[0010] Furthermore, the hot air assembly includes an end cover fixedly installed on the right end of the drying drum by bolts, and an energized conductive rod is fixedly installed inside the end cover, one end of the energized conductive rod extends to the interior of the drying drum, and a heating wire is provided on the outer surface of the energized conductive rod and in the inner cavity of the drying drum, and the other end of the energized conductive rod is connected to an external power supply and a control system, a hollow slip ring is movably sleeved on the outer end of the end cover, and the inner cavity of the hollow slip ring is connected to the inner side of the end cover, one side of the outer surface of the hollow slip ring is fixedly connected with an air intake pipe extending into its inner cavity, and the other end of the air intake pipe is connected to a high-pressure air pump, so that the high-pressure airflow entering the inner cavity of the drying drum through the air intake pipe can be heated by the heating wire.

[0011] Furthermore, the heating wire is configured as a spiral structure, and its pitch gradually increases from left to right, so that it can gradually heat and dry the positive electrode material entering the drying drum, thereby preventing the positive electrode material entering the drying drum from being "damaged" due to a sudden increase in temperature.

[0012] Furthermore, the gas flow rate entering the inner cavity of the drying drum through the air inlet pipe is flexibly adjusted according to the specific positive electrode material and its humidity, so that the positive electrode material can be blown out by the air flow after reaching the set dryness:

[0013] Under the same humidity conditions, when the mass of the positive electrode material is large, the residence time of the positive electrode material in the drying drum can be reduced by increasing the intensity of the airflow entering the drying drum;

[0014] Under the same quality conditions, when the humidity of the positive electrode material is higher, the residence time of the positive electrode material in the drying drum can be increased by reducing the intensity of the airflow entering the drying drum.

[0015] Furthermore, the inner wall of the end cover is configured as an arc-shaped curved surface structure, and the inner diameter of the inner end thereof is the same as the diameter of the trajectory circle formed by the guide plate, thereby ensuring that the high-pressure airflow through the air inlet duct can stably enter the inner cavity of the drying drum.

[0016] The beneficial effects of the present invention are as follows:

[0017] The present application provides a drying device for energy storage battery manufacturing. With respect to the arrangement of a drying drum and a hot air assembly, as the drying drum rotates, the positive electrode material entering from a feed hopper into the inner cavity of the drying drum can be "cut" to prevent the positive electrode material from agglomerating, thereby achieving better uniformity in drying the positive electrode material. At the same time, under the action of a reflux rib plate, when the positive electrode material is less dry and heavier in weight, it comes into contact with the inner wall of the drying drum under the action of the centrifugal force of the rotation of the drying drum, and is transported in the reverse direction to increase its residence time in the inner cavity of the drying drum, thereby effectively improving the drying effect of the drying device on the positive electrode material. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without creative work:

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 It is a front view of the structure of the present invention;

[0021] Figure 3 It is a cross-sectional view at AA of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the drying drum of the present invention;

[0023] Figure 5 It is a schematic structural diagram of the hot air component of the present invention.

[0024] In the figure: 1-drying drum, 2-supporting legs, 3-pulley component, 4-return rib plate, 5-feed hopper, 6-hot air component, 7-connecting slot hole, 8-guide plate, 9-end cover, 10-electric guide rod, 11-hollow slip ring, 12-intake pipe, 13-electric heating wire. DETAILED DESCRIPTION

[0025] 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.

[0026] like Figure 1 , Figure 2 As shown, a drying device for manufacturing energy storage batteries includes a drying drum 1 for drying positive electrode materials with high viscosity. A set of legs 2 are respectively provided on the left and right sides of the outer surface of the drying drum 1, and a pulley component 3 connected to an external power mechanism is fixedly sleeved in the middle of the outer surface of the drying drum 1. Then, under the transmission action of the pulley component 3, the drying drum 1 can be driven by the external power mechanism to rotate, such as Figure 3 , Figure 4 As shown, a feed hopper 5 for conveying positive electrode materials into the drying drum 1 is provided at the top end of the right leg 2, and three groups of connecting slots 7 arranged in a circular shape are provided inside the right side of the drying drum 1 and at a position corresponding to the feed hopper 5. In the process of conveying the positive electrode materials, as the drying drum 1 rotates, the connecting slots 7 thereon can "cut" the positive electrode materials being conveyed to prevent them from forming lumps due to excessive viscosity. A hot air component 6 is provided at the right end portion of the drying drum 1, and hot air is conveyed into the inner cavity of the drying drum 1 through the hot air component 6 to dry the positive electrode materials therein.

[0027] like Figure 4As shown, in the technical solution, the inner wall of the drying drum 1 is provided with a spiral reflux rib plate 4, and the reflux rib plate 4 can transport the positive electrode material in the drying drum 1 to the right side as the drying drum 1 rotates;

[0028] Furthermore, under the action of the hot air from the hot air component 6, the positive electrode material in the inner cavity of the drying drum 1 can be transported to the left. When the positive electrode material is less dry and heavier, it comes into contact with the inner wall of the drying drum 1 under the action of the centrifugal force of the rotation, and is transported in the reverse direction to increase its residence time in the inner cavity of the drying drum 1; and when the positive electrode material is more dry and lighter, it is discharged through the left side of the drying drum 1 along with the flow of the hot air from the hot air component 6, and enters the next process.

[0029] like Figure 3 , Figure 4 As shown, in the present technical solution, a semi-open guide plate 8 is provided on the inner wall of the drying drum 1 and at a position corresponding to the connecting slot hole 7, and the opening direction of the guide plate 8 is the same as the rotation direction of the drying drum 1, thereby effectively preventing the hot air generated in the hot air assembly 6 from flowing from the connecting slot hole 7 to the feed hopper 5.

[0030] like Figure 5 As shown, in the present technical scheme, the hot air assembly 6 includes an end cover 9 fixedly installed on the right end of the drying drum 1 by bolts, and an electric conducting rod 10 is fixedly installed inside the end cover 9, one end of the electric conducting rod 10 extends to the interior of the drying drum 1, and an electric heating wire 13 is provided on the outer surface of the electric conducting rod 10 and in the inner cavity of the drying drum 1, and the other end of the electric conducting rod 10 is connected to an external power supply and a control system, and a hollow slip ring 11 is movably sleeved on the outer end of the end cover 9, and the inner cavity of the hollow slip ring 11 is connected to the inner side of the end cover 9, and one side of the outer surface of the hollow slip ring 11 is fixedly connected with an air intake pipe 12 extending into its inner cavity, and the other end of the air intake pipe 12 is connected to a high-pressure air pump, so that the high-pressure airflow entering the inner cavity of the drying drum 1 through the air intake pipe 12 can be heated by the electric heating wire 13.

[0031] like Figure 5 As shown, in the present technical solution, the heating wire 13 is set to a spiral structure, and its pitch gradually increases from left to right, so that it can gradually heat and dry the positive electrode material entering the drying drum 1, thereby preventing the positive electrode material entering the drying drum 1 from being "damaged" due to a sudden increase in temperature.

[0032] In the present technical solution, the gas flow rate entering the inner cavity of the drying drum 1 through the air inlet pipe 12 is flexibly adjusted according to the specific positive electrode material and its humidity, so that the positive electrode material can be blown out by the air flow after reaching the set dryness:

[0033] Under the same humidity conditions, when the mass of the positive electrode material is large, the residence time of the positive electrode material in the drying drum 1 can be reduced by increasing the intensity of the airflow entering the drying drum 1;

[0034] Under the same quality conditions, when the humidity of the positive electrode material is relatively high, the residence time of the positive electrode material in the drying drum 1 can be increased by reducing the intensity of the airflow entering the drying drum 1 .

[0035] like Figure 2 , Figure 4 as well as Figure 5 As shown, in the present technical solution, the inner wall of the end cover 9 is set to an arc-shaped curved surface structure, and the inner diameter of its inner end is the same as the diameter of the trajectory circle formed by the guide plate 8, thereby ensuring that the high-pressure airflow through the air inlet duct 12 can stably enter the inner cavity of the drying drum 1.

[0036] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A drying device for manufacturing energy storage batteries, comprising a drying drum (1), wherein a group of legs (2) are respectively provided on the left and right sides of the outer surface of the drying drum (1), and a pulley member (3) connected to an external power mechanism is fixedly sleeved in the middle of the outer surface of the drying drum (1), characterized in that: A feed hopper (5) is provided at the top end of the right support leg (2), and a connecting slot (7) is provided inside the right side of the drying drum (1) at a position corresponding to the feed hopper (5), and a hot air assembly (6) is provided at the right end of the drying drum (1); The hot air assembly (6) comprises an end cover (9) fixedly mounted on the right end of the drying drum (1) by means of bolts, an electric conducting rod (10) being fixedly mounted inside the end cover (9), one end of the electric conducting rod (10) extending into the interior of the drying drum (1), and an electric heating wire (13) being provided on the outer surface of the electric conducting rod (10) and in the inner cavity of the drying drum (1), a hollow slip ring (11) being movably sleeved on the outer end of the end cover (9), the inner cavity of the hollow slip ring (11) being connected to the inner side of the end cover (9), and an air intake duct (12) extending into the inner cavity of the hollow slip ring (11) being fixedly connected to one side of the outer surface of the hollow slip ring (11).

2. The drying equipment for energy storage battery manufacturing according to claim 1, characterized in that: The inner wall of the drying drum (1) is provided with a reflux rib plate (4) having a spiral structure, and the reflux rib plate (4) transports the positive electrode material in the drying drum (1) to the right side as the drying drum (1) rotates.

3. The drying equipment for manufacturing energy storage batteries according to claim 2, characterized in that: A semi-open guide plate (8) is provided on the inner wall of the drying drum (1) at a position corresponding to the connecting slot hole (7), and the opening direction of the guide plate (8) is the same as the rotation direction of the drying drum (1).

4. The drying equipment for energy storage battery manufacturing according to claim 1, characterized in that: The heating wire (13) is configured as a spiral structure, and its pitch gradually increases from left to right.

5. The drying equipment for energy storage battery manufacturing according to claim 4, characterized in that: The flow rate of the gas entering the inner cavity of the drying drum (1) through the air inlet pipe (12) can be flexibly adjusted according to the specific positive electrode material and its humidity.

6. The drying equipment for energy storage battery manufacturing according to claim 5, characterized in that: The inner wall of the end cover (9) is configured as an arc-shaped curved surface structure, and the inner diameter of the inner end thereof is the same as the diameter of the trajectory circle formed by the guide plate (8).

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