CN220086137U - Pole piece composite device and lamination equipment - Google Patents

Abstract

The utility model provides a pole piece compounding device and lamination equipment. The pole piece compounding device of the utility model includes a raw material conveying mechanism, a thermal compounding mechanism, a diaphragm cutting mechanism and a rejecting mechanism arranged sequentially along the pole piece conveying path. The raw material conveying mechanism includes a pole piece conveying unit and a diaphragm conveying unit; the pole piece conveying unit has a pole piece detection component, and the pole piece detection component can detect the first preset defect on the pole piece, and detect the portion of the pole piece where the first preset defect exists. Set the mark; the rejection mechanism can detect the second preset defect and mark on the composite piece, and reject the composite piece with the second preset defect or mark. The pole piece composite device of the present invention facilitates better detection by enabling the pole piece detection component to set marks on the defective parts of the pole pieces, and enabling the rejection mechanism to detect the second preset defects and marks on the composite piece. Eliminate defective pole pieces and improve the accuracy of pole piece removal.

Description

Pole piece composite device and lamination equipment

Technical field

The utility model relates to the technical field of lithium ion batteries, in particular to a pole piece composite device. At the same time, the utility model also relates to a lamination equipment provided with the pole piece composite device.

Background technique

Lithium-ion batteries are widely used due to their high energy density, long service life, green and pollution-free characteristics. As an important step in the production process of lithium-ion batteries, the lamination process will have an important impact on the energy density and stability of the battery core. Since during the lamination process, there will be defects such as slurry bulges or agglomeration, metal material dirt, and scratches on the pole pieces. In order to ensure the performance of the battery core, the existing lamination equipment must , usually the defects on the pole pieces are detected and the defective pole pieces are removed.

However, the pole piece composite device in the existing lamination equipment is limited by its own structure, and the ability to detect defective pole pieces needs to be improved, and there are cases of misjudgment during the detection. Therefore, during the production process There is a phenomenon of mistakenly removing normal pole pieces and missing defective pole pieces, which can easily lead to a waste of production resources, and if there are defective pole pieces in the battery core, it will also have a negative impact on its performance.

Utility model content

In view of this, the present utility model aims to provide a pole piece composite device to improve the accuracy of pole piece removal.

In order to achieve the above purpose, the technical solution of the present invention is achieved as follows:

A pole piece compounding device, with a raw material conveying mechanism, a thermal compounding mechanism, a diaphragm cutting mechanism and a rejecting mechanism sequentially arranged along the pole piece conveying path, and the raw material conveying mechanism includes a pole piece conveying unit and a diaphragm conveying unit;

The pole piece transport unit has a pole piece detection component and a pole piece cutting component. The pole piece detection component can detect the first preset defect on the pole piece and detect the presence of the first preset defect on the pole piece. The defective part is marked, and the pole piece cutting component is located downstream of the pole piece detection component and can cut the pole piece to a preset size;

The thermal compounding mechanism is used to thermally compound the diaphragm and the pole piece cut to the preset size into a composite piece, the diaphragm cutting mechanism is used to cut the diaphragm, and the rejecting mechanism can detect all The second preset defect and the mark on the composite piece are removed, and the composite piece with the second preset defect or the mark is removed.

Further, the pole piece detection assembly includes a first detection module for detecting a first preset defect on the pole piece, and a labeling module for pasting the mark on the pole piece.

Furthermore, the pole piece transport unit also includes a pole piece unwinding assembly, which includes a pole piece unwinding shaft and a pole piece material receiving platform provided downstream of the pole piece unwinding shaft.

Further, the pole piece transport unit also includes a correction sensor disposed between the pole piece unwinding shaft and the pole piece material receiving platform;

The pole piece transport unit also includes a pole piece correction assembly disposed between the pole piece unwinding assembly and the pole piece detection assembly.

Further, the pole piece deviation correction assembly includes a tensioning module and a deviation correction module arranged in sequence along the pole piece transportation direction.

Further, the pole piece transport units are multiple groups arranged side by side, and the pole piece transport units of each group selectively transport the pole pieces to the thermal composite mechanism.

Further, the separator transport unit includes a separator unwinding assembly, which includes a separator unwinding reel, and a separator material receiving platform disposed between the separator unwinding reel and the thermal composite unit.

Further, the thermal compounding mechanism has multiple sets of compound pairs of rollers arranged sequentially along the pole piece conveying direction. The compound pairs of rollers include an upper pressure roller and a lower pressure roller arranged at intervals up and down. The pole pieces and the diaphragm are formed from passing between the upper pressure roller and the lower pressure roller.

Further, the rejection mechanism includes a second detection module for detecting the second preset defect and the mark, and a rejection module for rejecting the composite sheet.

Compared with the existing technology, this utility model has the following advantages:

The pole piece composite device of the present utility model is provided with a pole piece detection component to detect the first preset defect on the pole piece, and sets a mark on the defective part of the pole piece, and is provided with a rejection mechanism to detect the defect on the composite piece. The second preset defect and mark is detected to facilitate the better removal of defective pole pieces and improve the accuracy of pole piece removal.

In addition, by providing the upper detection part and the lower detection part, it is convenient to detect the upper and lower surfaces of the pole piece. And by making the pole piece conveying unit include a pole piece material receiving platform, it is convenient to connect the replaced pole piece with the original pole piece after replacing the pole piece roll.

In addition, by providing a correction sensor and a pole piece correction assembly, it is easy to prevent the pole piece from being skewed during transportation. And by making the deviation correction assembly include a tensioning module, the tensioning of the pole piece belt is facilitated.

Furthermore, by setting the pole piece transport units into multiple groups arranged side by side, and allowing each pole piece transport unit to selectively transport the pole pieces to the thermal compounding mechanism, it is beneficial to improve the pole piece transport efficiency and the performance of the pole piece compound device. Momentum rate.

Secondly, by having the thermal compounding mechanism have multiple sets of compounding rollers arranged sequentially along the pole piece conveying direction, it is easy to ensure the firmness of the compounding of the pole piece and the separator.

Another object of the present invention is to provide a lamination equipment, which is provided with the pole piece composite device as described above.

The stacking equipment of the present invention has the same technical effect as the above-mentioned pole piece composite device compared to the existing technology, and will not be described again here.

Description of drawings

The drawings that constitute a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the attached picture:

Figure 1 is a schematic structural diagram of a pole piece composite device according to an embodiment of the present utility model;

Figure 2 is a schematic structural diagram of the labeling module according to the embodiment of the present invention.

Explanation of reference symbols:

1. Pole piece unwinding assembly; 101. Pole piece unwinding reel; 102. Pole piece material receiving platform; 103. Correction sensor; 2. Pole piece correction assembly; 201. Tensioning module; 202. Correction module; 3. Pole piece Detection component; 301, first detection module; 3011, upper detection part; 3012, lower detection part; 302, labeling module;

4. Pole piece cutting component; 5. Diaphragm unwinding component; 501. Diaphragm unwinding reel; 502. Diaphragm splicing platform; 6. Thermal composite mechanism; 601. Composite pair of rollers; 6011. Upper pressure roller; 6012. Lower pressure roller; 7. Cache mechanism; 8. Diaphragm cutting mechanism; 9. Roller.

Detailed ways

It should be noted that, as long as there is no conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

In the description of the present invention, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer" appear, they are based on the orientation or position shown in the drawings. The relationship is only for the convenience of describing the present invention and simplifying the description, but 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 therefore cannot be understood as a limitation of the present invention. In addition, if terms such as “first” and “second” appear, they are used for descriptive purposes only and shall not be understood as indicating or implying relative importance.

In addition, in the description of the present utility model, unless otherwise explicitly limited, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or it can be an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be internal to two components. Connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood based on specific circumstances.

The utility model will be described in detail below with reference to the accompanying drawings and embodiments.

Embodiment 1

This embodiment relates to a pole piece compounding device. In terms of overall structure, the pole piece compounding device includes a raw material conveying mechanism, a thermal compounding mechanism 6, a diaphragm cutting mechanism 8 and a rejecting mechanism arranged sequentially along the pole piece conveying path. The raw material conveying mechanism Including pole piece conveying unit and diaphragm conveying unit. The pole piece transport unit has a pole piece detection component 3 and a pole piece cutting component 4. The pole piece detection component 3 can detect the first preset defect on the pole piece and set a mark on the part of the pole piece where the first preset defect exists. The piece cutting component 4 is located downstream of the pole piece detection component 3 and can cut the pole piece to a preset size.

In addition, the thermal compounding mechanism 6 is used to thermally compound the diaphragm and the pole piece cut to a preset size into a composite piece, the diaphragm cutting mechanism 8 is used to cut the diaphragm, and the rejection mechanism can detect the second preset defect on the composite piece and mark, and remove the composite pieces with the second preset defect or the mark.

It can be understood that in this embodiment, the pole piece detection component 3 is provided to detect the first preset defect on the pole piece, and a mark is set on the defective part of the pole piece, and a rejection mechanism is provided to detect the third preset defect on the composite piece. 2. Preset defects and marks for detection, which facilitates the better removal of defective pole pieces and improves the accuracy of pole piece removal.

It should be noted that the above-mentioned first predetermined defects may be slurry bulges or aggregation in the coated foil, and defects such as scratches and foreign matter on the surface of the foil. The above-mentioned second predetermined defect may be scratches, damage, foreign matter and other defects on the surface of the composite sheet.

Based on the above overall introduction, an exemplary structure of this embodiment is shown in FIGS. 1 to 2 . Moreover, as a preferred implementation manner, the pole piece detection assembly 3 of this embodiment includes a first detection module 301 for detecting the first preset defect on the pole piece, and a labeling module for pasting labels on the pole piece. 302. The first detection module 301 includes an upper detection part 3011 that detects the upper surface of the pole piece, and a lower detection part 3012 that detects the lower surface of the pole piece.

The upper detection part 3011 and the lower detection part 3012 of this embodiment can be devices commonly used in the prior art to detect defects on the pole pieces, such as CCD cameras. As shown in Figure 1, there are two devices on the upper and lower sides of the pole piece. Detection parts are provided on both sides to detect defects existing on the upper and lower sides of the pole piece.

The labeling module 302 can be a mechanism commonly used in the prior art for applying glue to the surface of the pole piece. As shown in Figures 1 and 2, the pole piece passes between the roller 9 and the labeling module 302. Of course, using labeling to set marks on the surface of the pole piece is only a better implementation method. In addition, other methods of setting marks on the surface of the pole piece that are commonly used in the prior art can also be used, such as laser marking. .

As a preferred implementation, as shown in Figure 1, in this embodiment, the pole piece transport unit also includes a pole piece unwinding assembly 1, and the pole piece unwinding assembly 1 includes a pole piece unwinding reel 101, and is provided with The pole piece material receiving platform 102 is downstream of the pole piece unwinding reel 101. It can be understood that by providing the pole piece material receiving platform 102, it is convenient to complete the connection between the replaced pole piece material strip and the original pole piece material strip on the pole piece material receiving platform 102 when replacing the pole piece roll. It is easy to operate without having to re-thread the belt after replacing the pole piece roll. Moreover, the pole piece connecting platform 102 of this embodiment can be designed with reference to the structure of the pole piece connecting mechanism commonly used in the prior art.

In addition, as a further preference, in this embodiment, the pole piece transport unit also includes a correction sensor 103 disposed between the pole piece unwinding shaft 101 and the pole piece material receiving platform 102, and the pole piece transport unit further includes a deflection correction sensor 103 disposed between the pole piece unwinding shaft 101 and the pole piece material receiving platform 102. The pole piece correction assembly 2 is between the piece unwinding assembly 1 and the pole piece detection assembly 3. Among them, the correction sensor 103 can be the correction sensor 103 commonly used in the prior art. By providing the correction sensor 103, it is convenient to detect the pole pieces being unrolled by the pole piece unwinding shaft 101, so that when the pole pieces are deflected, Make prompts.

As a preferred arrangement, as shown in Figure 1, in this embodiment, the pole piece deviation correction assembly 2 includes a tensioning module 201 and a deviation correction module 202 arranged sequentially along the pole piece transportation direction. Among them, the tensioning module 201 includes a tension swing roller. In addition, the structures not mentioned in the tensioning module 201 can be designed with reference to the existing tensioning mechanism.

In addition, the correction module 202 can be designed with reference to the mechanism commonly used in the prior art for correcting the conveyed pole pieces. It can be understood that the tensioning module 201 is provided to facilitate the tensioning of the transported pole pieces, and the correction module 202 is provided to facilitate the correction of the pole pieces during the transportation process to prevent the transported pole pieces from appearing out of position. of deflection.

As a preferred embodiment, the pole piece transport units are multiple groups arranged side by side, and each group of pole piece transport units selectively transports the pole pieces to the thermal composite mechanism 6 . In specific implementation, as shown in Figure 1, in this embodiment, a total of two sets of pole piece transport units are provided. Of course, the number of pole piece transport units is not limited to two groups. In addition, it can also be three groups, four groups, five groups, six groups, etc.

By arranging the pole piece transport units into multiple groups, and allowing each pole piece transport unit to selectively transport pole pieces to the thermal composite mechanism 6, the efficiency of pole piece transport can be improved, and when a group of pole piece transport units fails or is replaced, In the case of rolls, the pole pieces can be transported through other pole piece conveying units, which will help improve the utilization rate of the device.

As a preferred embodiment, the membrane transport unit includes a membrane unwinding assembly 5, which includes a membrane unwinding reel 501, and a membrane material receiving platform 502 disposed between the membrane unwinding reel 501 and the thermal composite unit. Similar to the pole piece material receiving platform 102, the diaphragm material receiving platform 502 is provided in this embodiment to facilitate the connection of the replaced diaphragm material tape with the original diaphragm material tape after the roll change, thereby facilitating operation. Moreover, the diaphragm material receiving platform 502 is designed with reference to the structure of material belt connecting equipment commonly used in the prior art, and will not be described in detail here. As shown in Figure 1, there are two sets of symmetrically arranged diaphragm conveying units. The two sets of separator conveying units respectively convey diaphragms that are attached to the upper surface of the pole piece and the lower surface of the pole piece.

As a preferred arrangement, in this embodiment, the thermal compounding mechanism 6 has multiple sets of compound pair rollers 601 arranged sequentially along the pole piece conveying direction. The compound pair rollers 601 include upper pressure rollers 6011 and lower pressure rollers arranged at intervals up and down. The roller 6012, the pole piece and the diaphragm pass between the upper pressure roller 6011 and the lower pressure roller 6012. In this embodiment, multiple sets of composite rollers 601 are provided, which is beneficial to improving the firmness of the composite of the pole piece and the separator. In addition, other structures of the thermal compounding mechanism 6 not mentioned in this embodiment can be designed with reference to the structures of mechanisms commonly used for thermal compounding of pole pieces and diaphragms in the prior art.

Preferably, in this embodiment, the rejecting mechanism includes a second detection module for detecting second preset defects and marks, and a rejecting module for rejecting the composite sheet. It should be noted that the structure of the rejection mechanism is not shown in the accompanying drawings. In actual implementation, the second detection module can also use existing devices such as CCD cameras for detecting defects on composite sheets, and the rejection module The design can be made with reference to the structure of a mechanism for removing defective pole pieces commonly used in the prior art. By having the rejection mechanism include a second detection module and a rejection module, it is convenient to detect defects and marks existing on the composite sheet, and to reject modules with defects and marks.

When the pole piece composite device of this embodiment is used, the material strip unrolled by the pole piece unwinding assembly 1 passes through the pole piece correction assembly 2, and the pole piece detection assembly 3 detects the transported pole pieces and detects any defects. The pole piece is pasted with a mark, and then the pole piece cutting assembly 4 cuts the pole piece, and the cut pole piece and separator are transported to the thermal lamination mechanism 6 for thermal lamination operation. Moreover, the pole piece cutting assembly 4 can be a mechanism commonly used in the prior art for cutting pole pieces, and a transfer mechanism for transferring the pole pieces can be provided between the pole piece cutting assembly 4 and the thermal composite mechanism 6. The cut pole pieces are transferred to the thermal compounding mechanism 6.

In addition, the pole piece compounding device of this embodiment also includes a cache mechanism 7 located between the thermal compounding mechanism 6 and the diaphragm cutting mechanism 8. The cache mechanism 7 can cache the composite pieces obtained after thermal compounding to facilitate the separation of the diaphragms. The cutting mechanism 8 transports the composite sheets to it according to the demand. The composite sheets cut by the diaphragm cutting mechanism 8 are detected by the rejecting mechanism, and the defective composite sheets are removed.

The pole piece composite device of this embodiment is provided with a pole piece detection component 3 to detect the first preset defect on the pole piece, and sets a mark on the defective part of the pole piece to facilitate the positioning of the defective pole piece, and A removal mechanism is provided to detect the second preset defects and marks on the composite sheet, so as to better remove defective pole pieces and improve the accuracy of pole piece removal.

In addition, the pole piece with the first preset defect detected is only removed at the final removal mechanism, and only one removal mechanism is required. While simplifying the device structure, only one removal process is required, which is beneficial to production efficiency. improvement. Moreover, by providing the deviation correction sensor 103 and the pole piece deviation correction assembly 2, it is convenient to prevent the pole pieces from being skewed during transportation.

Embodiment 2

This embodiment relates to a lamination equipment, which is provided with the pole piece composite device of Embodiment 1.

The lamination equipment of this embodiment has the same technical effect as the pole piece composite device of Embodiment 1 compared to the existing technology, and will not be described again here.

The above descriptions are only preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in within the protection scope of this utility model.

Claims (10)

1. A pole piece composite device, characterized by: It includes a raw material conveying mechanism, a thermal compounding mechanism, a diaphragm cutting mechanism and a rejecting mechanism arranged sequentially along the pole piece conveying path. The raw material conveying mechanism includes a pole piece conveying unit and a diaphragm conveying unit; The pole piece transport unit has a pole piece detection component and a pole piece cutting component. The pole piece detection component can detect the first preset defect on the pole piece and detect the presence of the first preset defect on the pole piece. The defective part is marked, and the pole piece cutting component is located downstream of the pole piece detection component and can cut the pole piece to a preset size; The thermal compounding mechanism is used to thermally compound the diaphragm and the pole piece cut to the preset size into a composite piece, the diaphragm cutting mechanism is used to cut the diaphragm, and the rejecting mechanism can detect all The second preset defect and the mark on the composite piece are removed, and the composite piece with the second preset defect or the mark is removed. 2. The pole piece composite device according to claim 1, characterized in that: The pole piece detection component includes a first detection module for detecting a first preset defect on the pole piece, and a labeling module for pasting the mark on the pole piece; The first detection module includes an upper detection part for detecting the upper surface of the pole piece, and a lower detection part for detecting the lower surface of the pole piece. 3. The pole piece composite device according to claim 1, characterized in that: The pole piece transport unit also includes a pole piece unwinding assembly, and the pole piece unwinding assembly includes a pole piece unwinding shaft and a pole piece material receiving platform provided downstream of the pole piece unwinding shaft. 4. The pole piece composite device according to claim 3, characterized in that: The pole piece transport unit also includes a correction sensor disposed between the pole piece unwinding shaft and the pole piece material receiving platform; The pole piece transport unit also includes a pole piece correction assembly disposed between the pole piece unwinding assembly and the pole piece detection assembly. 5. The pole piece composite device according to claim 4, characterized in that: The pole piece deviation correction assembly includes a tensioning module and a deviation correction module arranged sequentially along the pole piece transportation direction. 6. The pole piece composite device according to claim 1, characterized in that: The pole piece transport units are multiple groups arranged side by side, and the pole piece transport units of each group selectively transport the pole pieces to the thermal composite mechanism. 7. The pole piece composite device according to claim 1, characterized in that: The separator transport unit includes a separator unwinding assembly, which includes a separator unwinding reel, and a separator material receiving platform disposed between the separator unwinding reel and the thermal composite unit. 8. The pole piece composite device according to claim 1, characterized in that: The thermal compounding mechanism has multiple sets of compound pairs of rollers arranged sequentially along the pole piece conveying direction. The compound pairs of rollers include an upper pressure roller and a lower pressure roller arranged at intervals up and down. The pole pieces and the diaphragm are formed from the upper and lower pressure rollers. Pass between the pressure roller and the lower pressure roller. 9. The pole piece composite device according to any one of claims 1 to 8, characterized in that: The rejecting mechanism includes a second detection module for detecting the second preset defect and the mark, and a rejecting module for rejecting the composite sheet. 10. A lamination equipment, characterized by: The lamination equipment is provided with the pole piece composite device according to any one of claims 1 to 9.