Battery pole piece drying device

Abstract

The utility model provides a kind of battery pole piece drying device, comprising: feed preheating module, the feed preheating module includes being arranged in the preheating cabin of first end, at least a pair of upper and lower symmetrical distribution's driving shaft, the outside fixed sleeve of each the driving shaft is connected with the elastic air bag of annular barrel structure, the outside sleeve of the elastic air bag is equipped with the preheating cylinder of annular barrel structure;Airflow drying module, the airflow drying module includes with the drying cabin of the preheating cabin outlet end intercommunication, multiple groups are arranged in the drying gas nozzle of the drying cabin;Cooling discharge module, the cooling discharge module includes with the cooling cabin of the drying cabin intercommunication, cooling unit is arranged in the cooling cabin.The utility model drying device steady preheating, high -efficient drying, uniform cooling, improve work efficiency, guarantee product quality.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing equipment technology, and in particular to a battery electrode drying device. Background Technology

[0002] Existing electrode material drying equipment mostly adopts a hot air drying chamber structure. The battery electrode material passes through a long drying chamber at a certain speed. Heated air or nitrogen is introduced into the chamber, and the coating is heated and dried through convection and conduction.

[0003] Because metallic materials are sensitive to deformation caused by temperature changes, and the temperature inside the drying oven is high, the temperature changes abruptly from the outside to the inside when the battery electrode enters the drying oven, which can easily damage the battery electrode structure and affect the quality of the battery electrode. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a battery electrode drying device that features gradient drying and efficient heat transfer.

[0005] According to an embodiment of the present invention, a battery electrode drying device includes:

[0006] The feeding preheating module includes a preheating chamber at the front end, at least one pair of symmetrically distributed active rotating shafts, and an elastic airbag with an annular cylindrical structure is fixedly sleeved on the outside of each active rotating shaft. The elastic airbag is covered with a preheating cylinder with an annular cylindrical structure.

[0007] An airflow drying module, comprising a drying chamber connected to the outlet end of the preheating chamber and multiple sets of drying air nozzles disposed within the drying chamber;

[0008] A cooling discharge module, comprising a cooling chamber connected to the drying chamber and a cooling unit disposed in the cooling chamber.

[0009] Preferably, the axes of the two symmetrically arranged active rotating shafts are horizontal and in the same vertical plane. The preheating cylinder has an annular preheating cavity inside. One end of the active rotating shaft has a heat medium channel and is connected to a heat medium pipeline through a rotary joint. The preheating cavity is connected to the heat medium channel through a flexible pipe.

[0010] More preferably, the other end of the active rotating shaft is provided with a gas channel and connected to an external air compressor through a rotary joint, and the inner side of the elastic airbag is connected to the gas channel.

[0011] More preferably, the drying nozzles are provided in two sets and are located above and below the battery electrode, respectively. Each set of drying nozzles has multiple nozzles and is evenly distributed in a direction parallel to the battery electrode. The drying nozzles form an acute angle of 15°-45° with the plane of the battery electrode.

[0012] More preferably, the outer wall of the preheating cylinder is provided with an anti-sticking protective layer.

[0013] More preferably, the outer wall of the elastic airbag is provided with a plurality of anti-slip protrusions parallel to its axis, the plurality of anti-slip protrusions are evenly distributed along the circumference of the elastic airbag, and the inner wall of the preheating cylinder is provided with anti-slip grooves corresponding to the anti-slip protrusions.

[0014] In a further preferred embodiment, the cooling unit includes at least one pair of cooling rollers symmetrically distributed vertically.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The feeding preheating module uses a preheating cylinder to preheat the newly arrived wet electrode sheets at a medium to low temperature, avoiding sudden temperature changes, improving drying quality, and ensuring product quality.

[0017] The structure employs an "active rotating shaft + elastic airbag + preheating cylinder" design. The elastic airbag expands after inflation, tightly pressing the preheating cylinder against the electrode surface, increasing the contact area and improving heat transfer efficiency. Simultaneously, the elastic contact prevents damage to the wet coating from rigid rollers. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of a battery electrode drying device according to the present invention.

[0019] Figure 2 This is a schematic diagram of the internal structure of the preheating cylinder in a battery electrode drying device according to this utility model.

[0020] Figure 3 This is a schematic diagram of the internal structure of the preheating cylinder in a battery electrode drying device according to this utility model (left view).

[0021] In the above figures: 1. Feeding preheating module; 101. Preheating chamber; 110. Active rotating shaft; 111. Heat medium channel; 112. Gas channel; 120. Elastic airbag; 121. Anti-slip ridge; 130. Preheating cylinder; 131. Preheating cavity; 132. Flexible pipe; 133. Anti-stick protective layer; 134. Anti-slip groove; 2. Airflow drying module; 201. Drying chamber; 202. Drying air nozzle; 3. Cooling discharge module; 301. Cooling chamber; 302. Cooling unit. Detailed Implementation

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0023] This utility model provides an embodiment, such as Figure 1 As shown, a battery electrode drying device includes:

[0024] The feeding preheating module 1 includes a preheating chamber 101 at the front end and at least one pair of symmetrically distributed active rotating shafts 110. The active rotating shafts 110 pass through the preheating chamber 101 and are connected to a drive motor located outside the preheating chamber 101. Each active rotating shaft 110 is fixedly sleeved with an elastic airbag 120 of an annular cylindrical structure. The elastic airbag 120 is sleeved with a preheating cylinder 130 of an annular cylindrical structure, which provides stable and uniform preheating for the electrode sheet and performs gentle preliminary drying on the electrode sheet.

[0025] Airflow drying module 2, the airflow drying module 2 includes a drying chamber 201 connected to the outlet end of the preheating chamber 101, and multiple sets of drying air nozzles 202 disposed in the drying chamber 201;

[0026] Cooling discharge module 3, the cooling discharge module 3 includes a cooling chamber 301 connected to the drying chamber 201 and a cooling unit 302 disposed in the cooling chamber 301;

[0027] Specifically, the axes of the two symmetrically arranged active rotating shafts 110 are horizontal and lie in the same vertical plane, such as... Figure 3 As shown, the preheating cylinder 130 has an annular preheating chamber 131 inside. One end of the active rotating shaft 110 has a heat medium channel 111 and is connected to a heat medium pipeline via a rotary joint. The preheating chamber 131 is connected to the heat medium channel 111 via a flexible pipe 132. The heat medium flows in from the feed channel in the heat medium channel 111, enters the preheating chamber 131 of the preheating cylinder 130 through a flexible pipe 132, circulates in the chamber, and then returns through the discharge channel in the heat medium channel 111 via another flexible pipe 132, forming a closed loop, thereby heating the preheating cylinder 130. Each of the two channels is connected to a rotary joint.

[0028] Specifically, the other end of the active rotating shaft 110 is provided with a gas channel 112 and connected to an external air compressor through a rotary joint. The inner side of the elastic airbag 120 is connected to the gas channel 112. Compressed air is filled into the elastic airbag 120 through the gas channel 112, causing it to expand. This can change the support strength of the elastic airbag 120 and make it more adaptable.

[0029] To improve the drying effect, in a further embodiment, the drying nozzle 202 is provided in two sets and is located above and below the battery electrode respectively. Each set of the drying nozzle 202 has multiple nozzles and is evenly distributed along a direction parallel to the battery electrode. The drying nozzle 202 forms an acute angle of 15°-45° with the plane of the battery electrode. The angle design is conducive to the formation of turbulence and enhances the heat exchange effect.

[0030] High-temperature drying gas is ejected from the drying nozzle 202 and acts on the electrode surface at a certain angle, forming strong convective heat transfer, which greatly improves the efficiency of the main drying stage.

[0031] In order to prevent the preheating cylinder 130 from sticking to the electrode and to protect the electrode, in a further embodiment, the outer wall of the preheating cylinder 130 is provided with an anti-stick protective layer 133. The anti-stick protective layer 133 can be a polytetrafluoroethylene coating, a Teflon coating, or a highly polished electroplated hard chrome layer. These materials have excellent anti-stick properties, low coefficient of friction, and good thermal conductivity.

[0032] To ensure reliable power transmission, in a further implementation, such as Figure 2 As shown, a plurality of anti-slip protrusions 121 parallel to their axis are fixedly provided on the outer wall of the elastic airbag 120. The plurality of anti-slip protrusions 121 are evenly distributed along the circumference of the elastic airbag 120. The inner wall of the preheating cylinder 130 is provided with anti-slip grooves 134 corresponding to the anti-slip protrusions 121.

[0033] Specifically, the cooling unit 302 includes at least one pair of cooling rollers symmetrically distributed vertically. Cooling water is circulated inside the cooling rollers to cool the dried electrode sheets down to near room temperature before winding, preventing the electrode sheets from sticking or deforming due to residual heat.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A battery electrode drying device, characterized in that, include: The feeding preheating module (1) includes a preheating chamber (101) at the front end and at least one pair of symmetrically distributed active rotating shafts (110). Each active rotating shaft (110) is fixedly sleeved with an elastic airbag (120) of an annular cylindrical structure. The elastic airbag (120) is sleeved with a preheating cylinder (130) of an annular cylindrical structure. Airflow drying module (2), the airflow drying module (2) includes a drying chamber (201) connected to the outlet end of the preheating chamber (101) and multiple sets of drying air nozzles (202) arranged in the drying chamber (201); The cooling discharge module (3) includes a cooling chamber (301) connected to the drying chamber (201) and a cooling unit (302) disposed in the cooling chamber (301).

2. The battery electrode drying device according to claim 1, characterized in that, The axes of the two symmetrically arranged active rotating shafts (110) are horizontal and in the same vertical plane. The preheating cylinder (130) has an annular preheating cavity (131) inside. One end of the active rotating shaft (110) is provided with a heat medium channel (111) and is connected to a heat medium pipeline through a rotary joint. The preheating cavity (131) is connected to the heat medium channel (111) through a flexible pipe (132).

3. The battery electrode drying device according to claim 2, characterized in that, The other end of the active rotating shaft (110) is provided with a gas channel (112) and is connected to an external air compressor through a rotary joint. The inner side of the elastic airbag (120) is connected to the gas channel (112).

4. The battery electrode drying device according to claim 1, characterized in that, The drying nozzle (202) is provided in two sets and is located above and below the battery electrode respectively. Each set of the drying nozzle (202) has multiple nozzles and is evenly distributed in a direction parallel to the battery electrode. The drying nozzle (202) forms an acute angle of 15°-45° with the plane of the battery electrode.

5. A battery electrode drying apparatus according to any one of claims 1-4, characterized in that, The outer wall of the preheating cylinder (130) is provided with an anti-stick protective layer (133).

6. The battery electrode drying apparatus according to claim 5, characterized in that, Multiple anti-slip ridges (121) parallel to their axis are fixedly provided on the outer wall of the elastic airbag (120). The multiple anti-slip ridges (121) are evenly distributed along the circumference of the elastic airbag (120). The inner wall of the preheating cylinder (130) is provided with anti-slip grooves (134) corresponding to the anti-slip ridges (121).

7. The battery electrode drying apparatus according to claim 5, characterized in that, The cooling unit (302) includes at least one pair of cooling rollers symmetrically distributed vertically.

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