CN219356801U - A pole piece drying equipment - Google Patents

Abstract

This application proposes a pole piece drying equipment. The pole piece drying equipment includes a microwave output device and a microwave dehumidification device. The microwave dehumidification device includes a suction pipe. The suction pipe includes an air inlet and a baffle. On the circumferential side wall, the baffle is distributed below the air inlet to receive the condensed and dripped liquid droplets inside the exhaust pipe. The suction pipe extracts the water vapor generated during the drying process through the air inlet. The baffle can block the water droplets that condense and drip under the action of gravity, so as to prevent the water droplets from falling back from the air inlet to the external environment. The pole piece drying equipment can Avoid condensed water droplets falling back, thereby improving the quality of pole piece drying.

Description

A pole piece drying equipment

technical field

The application relates to the field of microwave drying, in particular to a pole piece drying equipment.

Background technique

In the lithium battery manufacturing process, the slurry needs to be coated on the surface of the pole piece, and then dried to form a coating layer. In the past, the pole piece drying equipment generally dried the pole piece by hot air drying. In order to improve the drying efficiency, some existing schemes integrated the microwave output device into the pole piece drying equipment, and accelerated the drying process through microwave heating. Pole piece drying.

After adding microwave heating, a large amount of water vapor will be generated in the microwave environment during the drying process. In order to improve the discharge effect of water vapor, the water vapor can be extracted by setting a dehumidification device on the pole piece path, but part of the water vapor is likely to be dehumidified. The interior of the device condenses, forming droplets that fall back from the air inlet on the pole piece, which may cause the pole piece to be damaged.

Contents of the invention

This application aims to solve at least one of the technical problems existing in the prior art. For this reason, the present application proposes a pole piece drying equipment, which can improve the quality of pole piece drying.

According to the pole piece drying equipment provided by the present application, it includes a microwave output device and a microwave dehumidification device. On the circumferential side wall of the air extraction pipe, the baffle plate is distributed below the air inlet to receive the condensed and dripped liquid droplets inside the air extraction pipe.

According to the pole piece drying equipment provided in the present application, at least the following technical effects are provided: the pole piece drying equipment is used for drying the pole piece, firstly, the microwave output device can generate microwaves, thereby heating the water in the pole piece to promote the evaporation of water, The suction pipe extracts the water vapor generated during the drying process through the air inlet. The baffle can block the water droplets that condense and drip under the action of gravity, so as to prevent the water droplets from falling back from the air inlet to the external environment. The pole piece drying equipment can Avoid condensed water droplets falling back, thereby improving the quality of pole piece drying.

According to some embodiments of the present application, the baffle extends from the edge of the air inlet to the inside of the suction pipe.

According to some embodiments of the present application, the circumferential side wall of the exhaust pipe includes a first circular arc segment and a second circular arc segment, the diameter of the first circular arc segment is smaller than that of the second circular arc segment, and the The first end of the first arc segment is connected to the first end of the second arc segment, the second end of the first arc segment extends into the recess of the second arc segment and The air inlet is formed between the second ends of the second arc segment, and the second end of the second arc segment forms the baffle.

According to some embodiments of the present application, the microwave dehumidification device includes a suction fan, the suction pipe includes an air outlet, the gas outlet is located at one end of the suction pipe along the axial direction, and the air outlet is connected to the suction fan.

According to some embodiments of the present application, the microwave output device includes a waveguide assembly, the exhaust pipe is located on one side of the waveguide assembly, and the air inlet faces the waveguide assembly.

According to some embodiments of the present application, the pole piece drying equipment includes a pole piece fixing device, the pole piece fixing device and the waveguide assembly are arranged oppositely in a first direction, and the waveguide assembly can be arranged along the The first direction moves to approach or move away from the pole piece fixing device.

According to some embodiments of the present application, the pole piece fixing device includes a bearing assembly, the bearing assembly includes a fixing platform and a clamping plate, the fixing platform is used to carry the pole piece, and the clamping plate is used to compress the pole piece edge.

According to some embodiments of the present application, the pole piece fixing device includes a second driving assembly, the carrying assembly is installed on the second driving assembly, and the second driving assembly is used to drive the carrying assembly along the second direction to move.

According to some embodiments of the present application, the pole piece drying equipment includes an oven, the oven forms a drying chamber, the pole piece fixing device, the microwave output device and the exhaust pipe are located in the drying chamber, The oven includes a door for closing or opening the drying chamber.

According to some embodiments of the present application, the waveguide assembly includes waveguide slits arranged at intervals along a third direction, the axis of the exhaust pipe is along the third direction, and the air inlet extends along the third direction .

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a partial structural schematic diagram of the pole piece drying equipment of the embodiment of the present application;

Fig. 2 is a schematic structural diagram of a microwave dehumidification device according to an embodiment of the present application;

Fig. 3 is the structural schematic diagram of the exhaust pipe of the embodiment of the present application;

Fig. 4 is a schematic structural diagram of the pole piece drying equipment of the embodiment of the present application.

Reference signs:

Air extraction pipe 110, air inlet 111, first arc segment 112, second arc segment 113, exhaust fan 120,

waveguide assembly 210, first drive assembly 220, mounting frame 230,

The carrying assembly 310, the fixing table 311, the splint 312, the second driving assembly 320,

Oven 400.

Detailed ways

Embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary, are only for explaining the present application, and should not be construed as limiting the present application.

In the description of the present application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc. indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only In order to facilitate the description of the application and simplify the description, it does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the application.

In the description of the present application, several means one or more, and multiple means two or more. Greater than, less than, exceeding, etc. are understood as not including the original number, and above, below, within, etc. are understood as including the original number. If the description of the first and second is only for the purpose of distinguishing the technical features, it cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features relation.

In the description of this application, unless otherwise clearly defined, words such as setting, installation, and connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in this application in combination with the specific content of the technical solution.

The microwave dehumidification device provided according to the present application includes a suction pipe 110. The suction pipe 110 includes an air inlet 111 and a baffle. 111, to accept the condensed and dripped liquid droplets inside the exhaust pipe.

The microwave dehumidification device is used to extract water vapor. For example, the microwave dehumidification device can be used in the pole piece drying equipment to suck the water vapor evaporated during the pole piece drying. Generally speaking, the water vapor entering the exhaust pipe 110 will be discharged out of the exhaust pipe 110 along with the air flow. The water vapor inside may also condense on the tube wall to form a water film. If the condensation speed is too fast, it may collect into water droplets and drip from the tube wall, and the water droplets may fall back from the air inlet on the surface of the drying item. , causing the drying quality to be affected.

According to the microwave dehumidification device provided by this application, by setting the baffle, the baffle can block the water droplets that condense and drip under the action of gravity, thereby preventing the water droplets from falling back from the air inlet to the external environment, and the microwave dehumidification device can avoid condensation. Water drops fall back.

The pole piece drying equipment provided by this application uses the microwave dehumidification device provided by this application, thereby avoiding the falling of water droplets during the drying process of the pole piece, avoiding the damage to the quality of the pole piece due to water droplets falling on the pole piece, and improving the efficiency of the drying process. Chip yield. The pole piece drying equipment provided by the present application also includes a microwave output device for generating microwaves.

Referring to the embodiment shown in FIG. 1 , the microwave output device includes a waveguide assembly 210 , the exhaust pipe 110 is located on one side of the waveguide assembly 210 , and the air inlet faces the waveguide assembly 210 . In Fig. 1, the waveguide assembly 210 faces the pole piece below, and the microwave emitted by the waveguide 210 is absorbed by the water in the pole piece, and the energy of the microwave is converted into heat energy by the vibration and friction of water molecules, so that the temperature rises rapidly and evaporates, and microwave heating can Penetrating the pole piece, heating the surface and internal water of the pole piece at the same time, so that the pole piece is evenly heated, and the water vapor evaporated and rising on the pole piece can be efficiently absorbed by the suction pipe 110 located on the side, thereby speeding up the drying of the pole piece.

It can be understood that the baffle can be designed in different forms, and in some embodiments, the baffle extends from the edge of the air inlet 111 to the inside of the exhaust pipe 110 . For example, with reference to the embodiment of FIG. 2 , the circumferential side wall of the exhaust pipe 110 includes a first arc segment 112 and a second arc segment 113 , the diameter of the first arc segment 112 is smaller than the second arc segment 113 , and the first arc segment 112 is smaller than the second arc segment 113 . The first end of a circular arc segment is connected to the first end of the second circular arc segment, and the second end of the first circular arc segment extends into the recess of the second circular arc segment and is in contact with the second circular arc segment. The air inlet is formed between the second ends of the second arc segment, and the second end of the second arc segment forms the baffle. Specifically, with reference to Fig. 3, the axis of the air extraction pipe 110 is along the horizontal direction, and the water droplets at the air inlet will fall on the baffle plate first when falling under the action of gravity, and then be discharged by the suction of the air extraction pipe 110, and Because the second end of the first arc segment 112 extends toward the direction of the second arc segment 113, and because the diameters of the first arc segment 112 and the second arc segment 113 are different, the second end of the first arc segment 112 The two ends can block the top of the air inlet 111 and the baffle, and the water droplets on the concave surface of the first arc section 112 or the top of the first arc section 112 can also fall on the first circle when falling under the action of gravity. In the upper surface of the arc section 112, without directly entering the air inlet 111, that is, the second end of the first circular arc section 112 can also form another baffle on the aforementioned baffle to further improve the prevention of water droplets. dripping effect. In addition, the first arc segment 112 and the second arc segment 113 make the suction pipe 110 form a volute-shaped air passage, which helps to suck the water film and water droplets on the inner wall of the suction pipe 110 .

Referring back to FIG. 2 , in some embodiments, the microwave dehumidification device includes an exhaust fan 120 , and the exhaust pipe 110 includes an air outlet located at one end of the exhaust pipe 110 along the axial direction, and the air outlet is connected to the exhaust fan 120 . The exhaust fan 120 generates an airflow along the axial direction of the exhaust pipe 110 to extract water vapor, water film and water drops on the inner wall of the exhaust pipe 110 .

In some embodiments, the pole piece drying equipment includes a pole piece fixing device, and the pole piece fixing device and the waveguide assembly 210 are arranged oppositely in the first direction. In FIG. 1 , the first direction refers to the up-and-down direction, and the pole piece fixing device is located below the waveguide assembly 210 , and the pole piece is placed horizontally on the pole piece fixing device, which is helpful for uniform drying of each area of the pole piece. In some embodiments, the waveguide assembly 210 can move along the first direction to approach or move away from the pole piece fixing device, so as to adjust the intensity of the microwave and adaptively control the drying rate of the pole piece. Referring to Fig. 1, the microwave output device also includes a first driving assembly 220 and a mounting frame 230, the first driving assembly 220 is mounted on the mounting frame 230, the waveguide assembly 210 is mounted on the first driving assembly 220, and the first driving assembly 220 drives The waveguide assembly 210 moves.

In some embodiments, the pole piece drying equipment is used in the stacking process, and the pole piece to be dried is provided in the form of a sheet, so the pole piece fixing device includes a carrying assembly 310, and the carrying assembly 310 includes a fixing table 311 and a splint 312 , the fixed table 311 is used to carry the pole piece, the clamping plate 312 is used to press the edge of the pole piece, and in some embodiments, the carrying assembly 310 can also move along the second direction. In FIG. 1 , the second direction refers to the left and right directions. On the one hand, the carrier assembly 310 can move to avoid the waveguide 210 assembly, which facilitates the loading and unloading of the pole piece. Drying, so that the size of the pole piece that can be dried by the pole piece drying equipment increases without adding more waveguide assemblies 210 . Referring to FIG. 1 , the pole piece fixing device further includes a second driving assembly 320 on which the carrying assembly 310 is installed, and the second driving assembly 320 drives the carrying assembly 310 to move.

The first drive assembly 220 and the second drive assembly 320 can use single-axis manipulators, screw-screw slider mechanisms, linear motors, etc. commonly used in the field.

In some embodiments, the pole piece drying equipment includes an oven 400, the oven 400 forms a drying chamber, the pole piece fixing device, the microwave output device and the exhaust pipe 110 are located in the drying chamber, the oven 400 includes a door, and the door is used to close Or open the drying chamber. The pole piece drying equipment with an openable door is suitable for batteries manufactured by the lamination process. In the lamination process, the strips are cut into individual pole pieces, and then the pole pieces and diaphragms are stacked on the Together to form a battery cell, a single pole piece can be put into the oven 400 for drying after coating. The door of the oven is closed during drying. Referring to the embodiment of Fig. 4, the box door is located on the movement route of the carrying assembly, and the size of the box door corresponds to the size of the carrying assembly. When loading and unloading, the carrying assembly can extend from the box door to the drying room, which is convenient Operators carry out loading and unloading operations.

It can be understood that, in order to reflect the internal state of the oven 400 , the door of the oven 400 is hidden in the embodiment of FIG. 4 .

In some embodiments, the waveguide assembly 210 includes waveguide slits arranged at intervals along the third direction, the axis of the exhaust pipe 110 is along the third direction, and the air inlet 111 extends along the third direction.

The pole piece drying equipment provided according to the present application will be described in detail in a specific embodiment below with reference to FIGS. 1 to 4 . It should be understood that the following description is only an illustration, rather than a specific limitation on the present application. This specific embodiment can also be replaced by or combined with the above-mentioned corresponding technical features.

The pole piece drying equipment includes an oven 400, a microwave dehumidification device, a microwave output device and a pole piece fixing device.

Referring to FIG. 4 , an oven 400 forms a drying chamber, and the oven 400 includes a door capable of closing or opening the drying chamber 400 .

Referring to Figure 1 and Figure 4, the pole piece fixing device is located at the bottom of the drying chamber, the pole piece fixing device includes a second drive member 320 and a bearing assembly 310, the installation height of the bearing assembly 310 corresponds to the box door, and the box door is in the left and right direction The width is greater than the width of the carrying assembly in the left and right direction, and the second driving assembly 320 can drive the carrying assembly 310 to move in the front and rear direction, and can drive the carrying assembly 310 to enter and exit from the box door. The carrying assembly 310 includes a fixing table 311 on which the pole piece is placed. The carrying assembly 310 also includes a splint 312 , which cooperates with the fixing table 311 to compress and fix the pole piece.

Referring to Fig. 1, the microwave output device includes a waveguide assembly 210, the waveguide assembly 210 has waveguide slits arranged at intervals along the left and right directions, the waveguide slits extend along the left and right directions, and the waveguide slits are arranged opposite to the pole piece fixing device in the up and down direction, The microwave output device also includes a mounting frame 230 and a first driving assembly 220, the mounting frame 230 adopts a gantry design, the first driving assembly 220 is mounted on the mounting frame 230, the waveguide assembly 210 is mounted on the first driving assembly 230, the first The driving assembly 230 can drive the waveguide assembly 210 to approach or move away from the pole piece fixing device in the up and down direction.

Referring to Fig. 1 and Fig. 2, the microwave dehumidification device includes an exhaust fan 120 and an exhaust pipe 110, the exhaust fan 120 is located outside the oven 400, one end of the exhaust pipe 110 is installed on the exhaust fan 120, and the other end of the exhaust pipe 110 is inserted into the drying chamber 400 Inside, the axis of the exhaust pipe 110 is along the left-right direction, and the exhaust pipe 110 is located on one side of the microwave output device. The circumferential sidewall of the exhaust pipe 110 comprises a first arc segment 112 and a second arc segment 113, the diameter of the first arc segment 112 is smaller than the second arc segment 113, and the first arc segment 112 and the second arc segment An air inlet 111 is formed between the segments 113, and the air inlet 111 extends along the left and right direction, the air inlet 111 faces the waveguide assembly 210, the end of the first arc segment 112 extends toward the direction of the second arc segment 113, and the end of the first arc segment 113 extends toward the second arc segment 113. A circular arc segment 112 and a second circular arc segment 113 respectively form baffles located above and below the air inlet 111 .

According to the pole piece drying equipment according to the embodiment of the present application, by adopting the above design, at least some functions can be realized: by setting the baffle, the baffle can block the water droplets that condense and drip under the action of gravity, thereby avoiding water droplets Falling back from the air inlet to the external environment, the pole piece drying equipment can prevent water droplets from falling back during the pole piece drying process, avoiding damage to the pole piece quality due to water droplets falling on the pole piece, and improving the pole piece yield in the drying process.

In the description of this specification, references to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific examples," or "some examples" are intended to mean that the implementation A specific feature, structure, material, or characteristic described by an embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations 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 any one or more embodiments or examples.

Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present application. The scope of the application is defined by the claims and their equivalents.

Claims (10)

1. A pole piece drying equipment, characterized in that, comprising: Microwave output device; A microwave dehumidification device, the microwave dehumidification device includes a suction pipe, the suction pipe includes an air inlet and a baffle, the air inlet is located on the circumferential side wall of the suction pipe, and the baffle is distributed on The bottom of the air inlet is used to receive the condensed and dripped liquid droplets inside the exhaust pipe. 2. The pole piece drying equipment according to claim 1, characterized in that: the baffle extends from the edge of the air inlet to the inside of the suction pipe. 3. The pole piece drying equipment according to claim 2, characterized in that: the circumferential side wall of the air extraction pipe includes a first arc segment and a second arc segment, and the diameter of the first arc segment is smaller than the second arc segment, the first end of the first arc segment is connected to the first end of the second arc segment, and the second end of the first arc segment extends to the The air inlet is formed in the recess of the second arc segment and between the second end of the second arc segment, and the second end of the second arc segment forms the baffle . 4. The pole piece drying equipment according to claim 1, characterized in that: the microwave dehumidification device includes a suction fan, and the suction pipe includes an air outlet, and the air outlet is located at one end of the suction pipe along the axial direction , the air outlet is connected to the exhaust fan. 5. The pole piece drying equipment according to any one of claims 1-4, characterized in that: the microwave output device includes a waveguide assembly, the exhaust pipe is located on one side of the waveguide assembly, the The air inlet faces the waveguide assembly. 6. The pole piece drying equipment according to claim 5, characterized in that: the pole piece drying equipment comprises a pole piece fixing device, and the pole piece fixing device and the waveguide assembly are opposite in the first direction Arranged, the waveguide assembly is movable along the first direction to approach or move away from the pole piece fixing device. 7. The pole piece drying equipment according to claim 6, characterized in that: the pole piece fixing device includes a bearing assembly, the bearing assembly includes a fixing table and a splint, the fixing table is used to carry the pole piece, the The splint is used to compress the edge of the pole piece. 8. The pole piece drying equipment according to claim 7, characterized in that: the pole piece fixing device includes a second drive assembly, the carrying assembly is installed on the second drive assembly, and the second drive The assembly is used to drive the carrying assembly to move along the second direction. 9. The pole piece drying equipment according to claim 7, characterized in that: the pole piece drying equipment comprises an oven, the oven forms a drying chamber, the pole piece fixing device, the microwave output device and The exhaust pipe is located in the drying chamber, and the oven includes a door for closing or opening the drying chamber. 10. The pole piece drying equipment according to claim 6, characterized in that: the waveguide assembly includes waveguide slits arranged at intervals along the third direction, the axis of the exhaust pipe is along the third direction, so The air inlet extends along the third direction.