Pole piece compounding mechanism and lamination equipment

Abstract

The utility model relates to a pole piece compounding mechanism and lamination equipment, and relates to the technical field of lamination equipment. The utility model provides a composite pole piece mechanism. The composite pole piece mechanism comprises a feeding pressing structure, a pressing roller structure and a heating device, the feeding pressing structure is used for pressing and conveying a pole piece and a diaphragm and forming a material belt; the pressing roller structure rotates and rolls the material belt; the heating device is arranged between the feeding pressing structure and the pressing roller structure and comprises an electromagnetic coil and a heating part, and the electromagnetic coil is electrified to heat the heating part so that the heating part can heat the material belt. The heating device is arranged between the feeding pressing structure and the pressing roller structure, so that the area of an unheated area on a material belt during shutdown and restart is reduced, and heat loss is reduced; by arranging the heating device, the electromagnetic coil is electrified to heat the heating part and electromagnetically heat the metal foil of the pole piece, and the foil directly conducts heat to the surface of the diaphragm. Therefore, the overall structure size and the space cost are reduced, and the thermal compounding effect is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lamination equipment technical field, specifically, relates to a kind of pole piece composite mechanism and lamination equipment. BACKGROUND

[0002] The current lithium battery heat composite lamination equipment needs to complete from initial material cutting into single piece, then through scrap, acceleration, heat composite to stack into battery etc. Many processes. Among them, heat composite is an important link of battery production, and its basic principle is to soften the diaphragm glue layer by heating, and then apply a certain pressure by rolling mill to make the positive and negative pole piece and diaphragm tightly adhere to form a composite material belt.

[0003] The inventor found that, due to the heating method, the process has the problems of slow heat conduction heating efficiency, short composite time and difficult heat composite temperature control, which may cause poor composite effect of positive and negative pole piece and diaphragm, composite sheet has angle, and there is risk of angle collision in subsequent transmission process and causes dust increase, in addition, it also affects the alignment degree when the battery is stacked. UTILITY MODEL CONTENT

[0004] The utility model aims to provide a kind of pole piece composite mechanism and lamination equipment, which can reduce heat loss and improve the heat composite effect of material belt.

[0005] The embodiment of the utility model can be realized as follows:

[0006] In the first aspect, the utility model provides a kind of composite pole piece mechanism, including material feeding and pressing structure, press roll structure and heating device;The material feeding and pressing structure is used to press and convey pole piece and diaphragm and form material belt;The press roll structure rotates and rolls material belt;The heating device is arranged between the material feeding and pressing structure and the press roll structure, and the heating device includes electromagnetic coil and heating part, and the electromagnetic coil heats the heating part to heat the material belt by the heating part.

[0007] Optionally, the heating device includes oppositely arranged first heating device and second heating device, the first heating device is located above the material belt, and the second heating device is located below the material belt.

[0008] Optionally, the heating device further includes an insulating part, the electromagnetic coil is wound on the insulating part in sequence, and the insulating part is provided with a through cavity for guiding cooling liquid.

[0009] Optionally, the composite pole piece mechanism further includes an infrared temperature measurement probe, and the infrared temperature measurement probe is used to detect the temperature of material belt at the output end of the heating device.

[0010] Optionally, the heating device further comprises an electrically connected transformer, a water chiller and a control cabinet; the control cabinet is electrically connected with the infrared temperature measurement probe;

[0011] The water chiller is communicated with both ends of the through cavity.

[0012] The transformer is connected with the electromagnetic coil.

[0013] Optionally, the heating part comprises a plurality of heating parts, and the plurality of heating parts are arranged at intervals.

[0014] The heating part at least comprises a ferrite.

[0015] Optionally, a groove is arranged on the heating part, and the electromagnetic coil is arranged in the groove.

[0016] Optionally, the material feeding and pressing structure comprises a first material feeding and pressing roller and a second material feeding and pressing roller arranged oppositely, the first material feeding and pressing roller is located above the material belt, and the second material feeding and pressing roller is located below the material belt.

[0017] The first material feeding and pressing roller and the second material feeding and pressing roller rotate to press the pole piece and the diaphragm to form the material belt.

[0018] Optionally, the roller structure comprises a driving structure and a first rolling roller and a second rolling roller arranged oppositely, the first rolling roller is located above the material belt, and the second rolling roller is located below the material belt.

[0019] The driving structure is in transmission connection with the first rolling roller and the second rolling roller, so as to drive the first rolling roller and the second rolling roller to rotate and roll press the material belt.

[0020] In the second aspect, the utility model further provides a lamination equipment, comprising: at least one composite pole piece mechanism.

[0021] The pole piece composite mechanism and the lamination equipment provided by the utility model have the following beneficial effects:

[0022] By arranging the heating device between the material feeding and pressing structure and the roller structure, the area of the unheated area of the material belt during shutdown and restart is reduced, heat loss is reduced, and efficiency is improved; by arranging the heating device, the electromagnetic coil is electrified to heat the heating part, and the metal foil of the pole piece is directly subjected to electromagnetic heating, the foil directly conducts heat to the surface of the diaphragm, and there is no large heat loss. The pole piece composite mechanism arranged in this way cancels the direct heating of the material belt by the rolling roller, reduces the overall structure volume and space cost, improves the heat conduction efficiency, effectively improves the thermal composite effect, and at the same time, the rolling pressure of the roller structure on the material belt is reduced from 0.8t to 0.4t. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0024] Figure 1 The first structure schematic diagram of the composite pole piece mechanism provided for the present embodiment;

[0025] Figure 2 The second structure schematic diagram of the composite pole piece mechanism provided for the present embodiment;

[0026] Figure 3 The plan view of the heating device provided for the present embodiment;

[0027] Figure 4 The sectional view of the heating device provided for the present embodiment;

[0028] Figure 5 The first pole piece composite mechanism structure schematic diagram provided for the present embodiment;

[0029] Figure 6 The structure schematic diagram of the first material belt provided for the present embodiment;

[0030] Figure 7 The second pole piece composite mechanism structure schematic diagram provided for the present embodiment;

[0031] Figure 8 The structure schematic diagram of the second material belt provided for the present embodiment.

[0032] Icon: 010 - laminating device; 011 - negative pole piece; 012 - diaphragm; 013 - positive pole piece; 100 - pole piece composite mechanism; 110 - first pole piece composite mechanism; 111 - first material belt; 120 - second pole piece composite mechanism; 121 - second material belt; 200 - material feeding and pressing structure; 210 - first material feeding and pressing roller; 220 - second material feeding and pressing roller; 300 - heating device; 301 - first heating device; 302 - second heating device; 310 - insulation part; 311 - through cavity; 320 - electromagnetic coil; 330 - heating part; 331 - groove; 340 - voltage transformer; 350 - water cooling machine; 360 - control cabinet; 400 - infrared temperature measurement probe; 500 - roller structure; 510 - first rolling roller; 520 - second rolling roller. DETAILED DESCRIPTION

[0033] The current lithium battery thermal composite lamination equipment needs to complete a complete cell production process from initial material cutting into single piece, to waste removal, acceleration, thermal compounding, and stacking into a cell. The thermal compounding is an important part of the cell production, and the basic principle is to soften the diaphragm glue layer by heating, and then to make the positive and negative plates and the diaphragm tightly adhere to form a composite material belt by applying pressure through a rolling mill.

[0034] The inventor found that the mainstream thermal compounding lamination equipment currently uses the following three technical solutions to improve the compounding effect of the material belt:

[0035] The first is to improve the compounding pressure of the rolling mill structure to improve the compounding effect. This solution is only suitable for thicker diaphragms. When the diaphragm is thinner, increasing the pressure will irreversibly damage the diaphragm. At the same time, increasing the pressure of the rolling mill will cause more damage to the positive plate, causing the coating layer at the edge of the positive plate to be separated from the diaphragm, resulting in a decrease in yield.

[0036] The second is to install a heating tube inside the rolling mill structure and heat the rolling mill. The hot rolling mill performs hot rolling on the continuous material belt to achieve "thermal compounding". This method has low heat conduction efficiency, short effective heating time, and poor compounding effect. After compounding, the positive plate may have a corner, which will affect the alignment of the cell when it is stacked.

[0037] The third is to use an oven device to heat the diaphragm and the positive plate before the plate is cut. After the plate is cut and accelerated, it is compounded by the compounding roller. When the equipment is restarted, the plates and diaphragms in the cutting and acceleration sections cannot be heated, and the local compounding effect is poor. At the same time, this solution uses a heating rod to heat, and the heating plate conducts heat to the plate and diaphragm, resulting in large heat loss and low efficiency. Therefore, the structure is large in size and high in space cost; the temperature feedback cannot be fully closed-loop detected on the surface of the plate.

[0038] As can be seen, due to the heating method, the process currently has the problems of slow heat conduction heating efficiency, short compounding time, and difficult thermal compounding temperature control, which may cause poor compounding effect of the positive and negative plates and the diaphragm, and the compounding plate may have a corner, which may cause a risk of corner collision in the subsequent transmission process and increase dust. In addition, it may also affect the alignment of the cell when it is stacked.

[0039] To solve the above problems, the utility model provides a plate compounding mechanism 100 and a lamination equipment 010, which can reduce heat loss and improve the thermal compounding effect of the material belt, thereby solving the above problems.

[0040] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.

[0042] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0043] In the description of the utility model, it should be explained that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the utility model product is used, only for the convenience of describing the utility model and simplifying the description, and it does not indicate or imply that the indicated device or element must have a particular orientation, structure and operation, therefore, it cannot be understood as a limitation on the utility model.

[0044] In addition, if the terms "first", "second" and the like appear, they are only used for differentiation description, and cannot be understood as indicating or implying relative importance.

[0045] It should be noted that the features in the embodiments of the utility model can be combined with each other without conflict.

[0046] The overall structure, working principle and technical effects of the pole piece compounding mechanism 100 and the lamination equipment 010 provided by the utility model will be described in detail below through embodiments and in combination with the drawings.

[0047] The utility model provides a kind of lamination equipment 010, it is applied to the positive pole piece 011, negative pole piece 011 and diaphragm 012 interval is stacked together and makes it closely adhere to form compound material belt, and then compound material belt is stacked to form complete battery.

[0048] In the present embodiment, please refer to Figure 5 And Figure 7The lamination device 010 comprises two electrode sheet laminating mechanisms 100; one of which is a first electrode sheet laminating mechanism 110, which is used to laminate the diaphragm 012 on the upper and lower ends of the negative electrode sheet 011 to form a first material strip 111; the other is a second electrode sheet laminating mechanism 120, which is used to laminate the positive electrode sheet 013 on the upper and lower ends of the first material strip 111 to form a second material strip 121.

[0049] It can be understood that, please refer to Figure 5 and Figure 7 , the first electrode sheet laminating mechanism 110 is located at the front end of the second electrode sheet laminating mechanism 120; wherein the positive electrode sheet 013 is transported to the first electrode sheet laminating mechanism 110, and the first electrode sheet laminating mechanism 110 laminates the diaphragm 012 on the upper and lower ends of the negative electrode sheet 011 to form the first material strip 111, please refer to Figure 6 ; then the first material strip 111 is transported to the second electrode sheet laminating mechanism 120, and the second electrode sheet laminating mechanism 120 laminates the diaphragm 012 on the upper and lower ends of the second material strip 121 to form the second material strip 121, please refer to Figure 8 . Finally, the second material strip 121 is a qualified laminated material strip, that is, a laminated material strip in which the positive electrode sheet 013, the negative electrode sheet 011 and the diaphragm 012 are effectively laminated, so as to facilitate the smooth progress of the subsequent lamination process.

[0050] Please refer to Figure 1 and Figure 2 , the electrode sheet laminating mechanism 100 proposed in the embodiment comprises an inlet pressing structure 200, a roller structure 500 and a heating device 300; the inlet pressing structure 200 is used to press and transport the electrode sheet and the diaphragm 012 and form a material strip; the roller structure 500 rotates to roll the material strip; the heating device 300 is arranged between the inlet pressing structure 200 and the roller structure 500, and the heating device 300 comprises an electromagnetic coil 320 and a heating part 330; the electromagnetic coil 320 is energized to heat the heating part 330, so that the heating part 330 heats the material strip.

[0051] It can be understood that, by arranging the heating device 300 between the inlet pressing structure 200 and the roller structure 500, the heating area for heating the material strip is moved to before the roller structure 500 and after the inlet pressing structure 200, so that the electrode sheet and the diaphragm 012 are synchronously heated by the heating device 300 before entering the inlet pressing structure 200, the area of the unheated region on the material strip during restart after shutdown is reduced, the heat loss is reduced, and the efficiency is improved; by arranging the heating device 300, the electromagnetic coil 320 is energized to heat the heating part 330, and the metal foil of the electrode sheet is directly subjected to electromagnetic heating, and the foil directly conducts heat to the surface of the diaphragm 012, without large heat loss.

[0052] The pole piece composite mechanism 100 is arranged in this way, which cancels the direct heating of the rolling roller on the material belt, reduces the overall structure volume and space cost, improves the heat conduction efficiency, and effectively improves the heat composite effect; at the same time, the rolling roller pressure applied by the pressure roller structure 500 on the material belt is reduced from 0.8t to 0.4t.

[0053] In the embodiment, the pole piece composite mechanism 100 comprises a feeding pressure structure 200.

[0054] Among them, please refer to Figure 1 and Figure 2 The feeding pressure structure 200 is arranged at the feeding end and is used for pressing and conveying the pole piece and the diaphragm 012 and forming the material belt.

[0055] In the embodiment, the feeding pressure structure 200 comprises a first feeding pressure roller 210 and a second feeding pressure roller 220 arranged oppositely; the first feeding pressure roller 210 is located above the material belt, and the first feeding pressure roller 210 is used for conveying the upper diaphragm 012 located on the upper side of the negative pole piece 011; the second feeding pressure roller 220 is located below the material belt, and the second feeding pressure roller 220 is used for conveying the lower diaphragm 012 located on the lower side of the negative pole piece 011; the first feeding pressure roller 210 and the second feeding pressure roller 220 rotate to press the pole piece and the diaphragm 012 to form the material belt.

[0056] Among them, in the first pole piece composite mechanism 110, the first feeding pressure roller 210 and the second feeding pressure roller 220 rotate to convey the negative pole piece 011, the upper diaphragm 012 located on the upper side of the negative pole piece 011 and the lower diaphragm 012 located on the lower side of the negative pole piece 011, and press to form the first material belt 111.

[0057] It can be understood that, please refer to Figure 5 and Figure 7 The first feeding pressure roller 210 and the second feeding pressure roller 220 provide balanced pressure on the upper and lower sides to press and fit the pole piece and the diaphragm 012, so as to control the fitting effect of the pole piece and the diaphragm 012.

[0058] In the embodiment, the pole piece composite mechanism 100 comprises a heating device 300.

[0059] Among them, the heating device 300 is used for electromagnetic heating of the metal foil of the pole piece in the material belt, and the metal foil of the pole piece directly conducts heat to the surface of the diaphragm 012, so as to soften the diaphragm 012 glue layer without large heat loss.

[0060] In the embodiment, please refer to Figure 1 and Figure 2The heating device 300 comprises a first heating device 301 and a second heating device 302 arranged oppositely, the first heating device 301 is arranged above the material belt, and the second heating device 302 is arranged below the material belt.

[0061] The first heating device 301 and the second heating device 302 heat the first material belt 111 or the second material belt 121 simultaneously from above and below, so as to realize uniform heating of the material belt and avoid poor composite effect caused by uneven heating temperature of the material belt.

[0062] In the embodiment, please refer to Figure 3 and Figure 4 The heating device 300 comprises an insulation part 310, an electromagnetic coil 320 and a heating part 330. The insulation part 310 is a U-shaped bent pipe structure, the electromagnetic coil 320 is wound on the insulation part 310 in sequence, and the insulation part 310 is provided with a through cavity 311 for guiding cooling liquid. The heating part 330 is provided with a groove 331, and the electromagnetic coil 320 is arranged in the groove 331.

[0063] In the embodiment, the heating part 330 comprises a plurality of heating parts 330, the plurality of heating parts 330 are arranged at intervals and arranged at two ends of the U-shaped insulation part 310 in sequence; and the two ends of the U-shaped insulation part 310 correspond to the material belt.

[0064] Of course, in other embodiments, the heating part 330 comprises one heating part 330, and the heating part 330 is formed with a groove 331 consistent with the shape of the insulation part 310, and the insulation part 310 is arranged in the groove 331.

[0065] The heating part 330 can be a ferrite.

[0066] It can be understood that the heating part 330 of the ferrite has excellent electrical conductivity and magnetic permeability. When the control cabinet 360 applies a certain alternating current through the electromagnetic coil 320, the electromagnetic coil 320 will generate an alternating magnetic field, and the alternating magnetic field will generate an induced current in the ferrite. Since the ferrite itself has a certain resistance, according to Joule's law Q=I 2 Rt, the induced current flowing in the heating part 330 will heat the heating part 330 itself, thereby achieving the purpose of heating.

[0067] In the embodiment, please refer to Figure 1 The heating device 300 further comprises a voltage transformer 340, a water chiller 350 and a control cabinet 360 which are electrically connected; the control cabinet 360 is electrically connected with the infrared temperature measuring probe 400; the water chiller 350 is communicated with both ends of the through cavity 311; and the voltage transformer 340 is connected with the electromagnetic coil 320.

[0068] The control cabinet 360 is used for receiving the signal of the infrared temperature measuring probe 400, and feeding back to the PLC after program algorithm processing, and the PLC adjusts the size of the alternating current of the coil after receiving the corresponding feedback, so as to change the magnetic flux change rate, further adjust the temperature of the pole piece heating, and complete the temperature regulation.

[0069] The water cooling machine 350 can effectively control the internal temperature of the electromagnetic coil 320, and protect the electromagnetic coil 320 from being burned out by heat, and form interlocking linkage with the heating structure.

[0070] In the embodiment, the pole piece composite mechanism 100 comprises an infrared temperature measuring probe 400.

[0071] The infrared temperature measuring probe 400 is used for detecting the temperature of the material belt at the output end of the heating device 300.

[0072] It can be understood that, please refer to Figure 1 After the material belt is heated by the heating device 300, the infrared temperature measuring probe 400 starts to measure the temperature of the material belt, and if the temperature exceeds the preset range, a signal is transmitted to the control cabinet 360. By adopting the mode of feeding back and adjusting the alternating current of the electromagnetic coil 320, the temperature fluctuation of the heating area is effectively controlled.

[0073] In the embodiment, the pole piece composite mechanism 100 comprises a pressure roller structure 500.

[0074] In the embodiment, please refer to Figure 1 and Figure 2 The pressure roller structure 500 comprises a driving structure and oppositely arranged first and second rolling rollers 510 and 520, the first rolling roller 510 is located above the material belt, and the second rolling roller 520 is located below the material belt; the driving structure is in transmission connection with the first and second rolling rollers 510 and 520, so as to drive the first and second rolling rollers 510 and 520 to rotate and roll the material belt.

[0075] It can be understood that the driving structure acts on the first and second rolling rollers 510 and 520 respectively, provides rotating power for the first and second rolling rollers 510 and 520, and synchronizes the movement of the material belt; the first and second rolling rollers 510 and 520 apply a certain pressure to the first material belt 111, so that the positive pole piece 013 or the negative pole piece 011 and the separator 012 are tightly attached.

[0076] The working principle and process of the A device provided by the embodiment of the utility model are as follows:

[0077] Please refer to Figure 5 and Figure 6In the first electrode sheet compounding mechanism 110, the negative electrode sheet 011 is transported to the first electrode sheet compounding mechanism 110, and the first material feeding and pressing roller 210 and the second material feeding and pressing roller 220 rotate to press and adhere the upper separator 012 and the lower separator 012 to the negative electrode sheet 011 to form the first material belt 111, and then the first material belt 111 is transported.

[0078] The first material belt 111 is heated in the heating device 300, and the separator 012 is softened.

[0079] The first rolling roller 510 and the second rolling roller 520 apply a certain pressure to the first material belt 111, so that the negative electrode sheet 011 and the separator 012 are tightly adhered.

[0080] Please refer to Figure 7 and Figure 8 In the second electrode sheet compounding mechanism 120, the first material belt 111 is transported to the second electrode sheet compounding mechanism 120, and the first material feeding and pressing roller 210 and the second material feeding and pressing roller 220 rotate to press and adhere the upper positive electrode sheet 013 and the lower positive electrode sheet 013 to the first material belt 111 to form the second material belt 121, and then the second material belt 121 is transported.

[0081] The second material belt 121 is heated in the heating device 300, and the upper separator 012 and the lower separator 012 are softened.

[0082] The first rolling roller 510 and the second rolling roller 520 apply a certain pressure to the second material belt 121, so that the positive electrode sheet 013 and the separator 012 of the first material belt 111 are tightly adhered. Finally, the second material belt 121 is a qualified composite material belt, that is, the positive electrode sheet 013, the negative electrode sheet 011 and the separator 012 are effectively adhered, so that the subsequent lamination process can be smoothly carried out.

[0083] In summary, the electrode sheet compounding mechanism 100 and the lamination equipment 010 provided by the embodiment of the utility model, by setting the heating device 300 between the material feeding and pressing structure 200 and the roller structure 500, the area of the area of the material belt that is not heated during the stop and restart is reduced, the heat loss is reduced, and the efficiency is improved. By setting the heating device 300, the electromagnetic coil 320 is energized to heat the heating part 330, and the metal foil of the electrode sheet is directly heated by electromagnetic heating. The foil directly conducts heat to the surface of the separator 012, and there is no large heat loss. The electrode sheet compounding mechanism 100 is set in this way, the rolling roller directly heats the material belt, the overall structure volume and space cost are reduced, the heat conduction efficiency is improved, and the heat compounding effect is effectively improved. At the same time, the rolling pressure of the roller structure 500 on the material belt is reduced from 0.8t to 0.4t.

[0084] The above merely illustrates the specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An electrode composite mechanism, characterized in that, include: A feeding and pressing structure is used to press and convey the electrode sheets and diaphragms and form a material strip; A pressure roller structure, wherein the pressure roller structure rotates and rolls the material strip; A heating device is provided, which is disposed between the feeding pressing structure and the pressure roller structure. The heating device includes an electromagnetic coil and a heating element. The electromagnetic coil is energized to heat the heating element, so that the heating element heats the material strip.

2. The electrode composite mechanism according to claim 1, characterized in that, The heating device includes a first heating device and a second heating device arranged opposite to each other, with the first heating device located above the material belt and the second heating device located below the material belt.

3. The electrode composite mechanism according to claim 1, characterized in that, The heating device also includes an insulating part, on which the electromagnetic coil is wound in sequence, and the insulating part has a cavity for guiding the coolant.

4. The electrode composite mechanism according to claim 3, characterized in that, The electrode composite mechanism also includes an infrared temperature probe, which is used to detect the temperature of the material strip at the output end of the heating device.

5. The electrode composite mechanism according to claim 4, characterized in that, The heating device also includes an electrically connected transformer, a water chiller, and a control cabinet; the control cabinet is electrically connected to the infrared temperature probe. The water chiller is connected to both ends of the passage cavity; The transformer is connected to the electromagnetic coil.

6. The electrode composite mechanism according to claim 1, characterized in that, The heating element includes multiple heating elements, which are spaced apart. The heating element comprises at least ferrite.

7. The electrode composite mechanism according to claim 1, characterized in that, The heating element has a groove, and the electromagnetic coil is disposed in the groove.

8. The electrode composite mechanism according to claim 1, characterized in that, The feeding and pressing structure includes a first feeding and pressing roller and a second feeding and pressing roller arranged opposite to each other, wherein the first feeding and pressing roller is located above the material belt and the second feeding and pressing roller is located below the material belt; The first feed pressing roller and the second feed pressing roller rotate to press the electrode and the diaphragm to form the material strip.

9. The electrode composite mechanism according to claim 1, characterized in that, The pressure roller structure includes a drive structure and a first and a second pressure roller arranged opposite to each other, with the first pressure roller located above the material belt and the second pressure roller located below the material belt; The drive structure is connected to the first and second rolling rollers to drive the first and second rolling rollers to rotate and roll the material strip.

10. A stacking device, characterized in that, include: At least one electrode composite mechanism as described in any one of claims 1-9.

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