Pole piece integrated forming device

Abstract

The utility model provides a kind of pole piece integrated forming equipment, including positive electrode conveying device, electrolyte film conveying device, negative electrode conveying device, oven, hot-pressing roller, tear film roller, compaction roller and punching device;Positive electrode conveying device, electrolyte film conveying device, negative electrode conveying device are sequentially and parallelly arranged in the upstream of oven, hot-pressing roller, tear film roller, compaction roller and punching device are sequentially arranged in the output end of oven, two tear film rollers are symmetrically arranged on both sides.The utility model synchronously conveys positive electrode layer, electrolyte film layer and negative electrode layer to oven by positive electrode conveying device, electrolyte film conveying device and negative electrode conveying device, realizes simultaneous drying, directly conveyed to rolling densification, cutting process by oven, battery core layer or battery monomer can be directly prepared, process parameter accurate cooperation is realized, operation process is simplified, production efficiency is improved;By setting the entire equipment in glove box, operation safety is fully guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of solid-state battery technology, specifically to an electrode integral molding equipment. Background Technology

[0002] The production of solid-state battery electrodes involves multiple key stages, covering the entire process from raw material processing to final molding. These stages include active material pretreatment, electrode forming, drying and curing, roll densification, slitting and cutting, etc., and each stage requires specific specialized equipment, resulting in a fragmented production process characterized by dispersed equipment and disjointed workflows. Firstly, the connection between equipment requires manual intervention or additional conveyor systems, leading to lengthy production processes and reduced efficiency. Secondly, the process parameters (such as temperature, pressure, and speed) of different equipment are difficult to precisely coordinate, easily causing fluctuations in electrode quality (such as uneven coating thickness, poor contact at the dry film transfer interface, and inconsistent roll density), affecting the consistency of battery performance. Thirdly, the dispersed equipment layout increases the production floor space and equipment investment costs, while also increasing energy consumption and maintenance complexity. Fourthly, during the transfer of electrodes from one piece of equipment to the next, environmental exposure (such as humidity and dust) can easily lead to electrode contamination. Especially for solid-state batteries, which have extremely high requirements for interface cleanliness, such contamination can significantly increase interfacial impedance and even pose safety hazards.

[0003] A Chinese patent with publication number CN115472917A discloses a method for preparing a solid-state battery and a solid-state battery, which relates to the field of battery manufacturing technology. The preparation method combines a solid electrolyte membrane and a negative electrode sheet together through a primary composite process to form a negative electrode composite strip. Then, the negative electrode composite strip is combined with a positive electrode sheet in a secondary process to form an electrode composite strip. Finally, the electrode composite strip is stacked to form a battery cell.

[0004] Therefore, in order to address the problems of dispersed equipment, fragmented processes, and poor coordination in the production of solid-state battery electrodes, there is a need for an integrated electrode molding equipment that can integrate multiple production stages and achieve precise coordination of process parameters, thereby simplifying the production process, improving production efficiency, ensuring the consistency of electrode quality, and reducing overall costs. Utility Model Content

[0005] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide an integrated electrode forming device.

[0006] According to the present invention, an integrated electrode forming device includes: a positive electrode conveying device, an electrolyte membrane conveying device, a negative electrode conveying device, an oven, a hot press roller, a film tearing roller, a compaction roller, and a punching device.

[0007] The positive electrode conveying device, electrolyte membrane conveying device, and negative electrode conveying device are arranged in parallel upstream of the oven. The positive electrode layer, electrolyte membrane layer, and negative electrode layer are conveyed to the input end of the oven through the positive electrode conveying device, electrolyte membrane conveying device, and negative electrode conveying device, respectively. The positive electrode layer, electrolyte membrane layer, and negative electrode layer are sequentially bonded together and dried in the oven to form a battery cell composite layer. The hot press roller, film tearing roller, compaction roller, and punching device are arranged in sequence at the output end of the oven. The battery cell composite layer passes through the working areas of the hot press roller, compaction roller, and punching device in sequence.

[0008] Both the positive electrode layer and the negative electrode layer have a base film on the side away from the electrolyte membrane layer. Two tear-off rollers are symmetrically arranged on both sides of the cell composite layer, and the base film on both sides can be removed synchronously by the tear-off rollers.

[0009] Preferably, a positive electrode slurry coating device is provided upstream of the positive electrode conveying device, and the positive electrode slurry is coated onto the base film through the positive electrode slurry coating device;

[0010] An anode slurry coating device is provided upstream of the anode conveying device, and the anode slurry is coated onto the base film through the anode slurry coating device.

[0011] Preferably, an electrolyte slurry coating device is provided upstream of the electrolyte membrane conveying device. The electrolyte slurry is coated onto the porous support membrane by the electrolyte slurry coating device to form a composite electrolyte membrane. The positive electrode layer, the composite electrolyte membrane and the negative electrode layer are sequentially bonded together and dried in an oven to form a battery cell composite layer.

[0012] Preferably, a positive electrode slurry coating device is provided upstream of the positive electrode conveying device, and the positive electrode slurry is coated onto the current collector by the positive electrode slurry coating device to form a positive electrode layer with current collector;

[0013] An upstream negative electrode slurry coating device is provided for the negative electrode conveying device. The negative electrode slurry is coated onto the current collector by the negative electrode slurry coating device to form a negative electrode layer with current collector.

[0014] The working areas of the current collector positive electrode layer and the current collector negative electrode layer do not pass through the film-tearing roller.

[0015] Preferably, the electrolyte membrane conveying device is equipped with an electrolyte slurry coating device, which coats the electrolyte slurry onto the positive electrode layer with current collector or the negative electrode layer with current collector.

[0016] Preferably, the positive electrode layer includes a positive electrode dry film, the electrolyte membrane layer includes an electrolyte dry film, the negative electrode layer includes a negative electrode dry film, and the positive electrode dry film, the electrolyte dry film and the negative electrode dry film are sequentially bonded together to form a dry film battery cell composite layer, wherein the dry film battery cell composite layer does not pass through the working area of ​​the film-tearing roller.

[0017] Preferably, an electrolyte slurry coating device is provided upstream of the electrolyte membrane conveying device. The electrolyte slurry is coated onto the electrolyte base membrane by the electrolyte slurry coating device to form an electrolyte membrane to be dried. The electrolyte base membrane is located on the side away from the positive electrode layer. The positive electrode layer and the electrolyte membrane to be dried are bonded together and conveyed to an oven for drying to form a positive electrode and electrolyte composite layer. The positive electrode and electrolyte composite layer is conveyed to a hot press roller for transfer through the oven. The electrolyte base membrane is removed by a film peeling roller.

[0018] Preferably, an electrolyte slurry coating device is provided upstream of the electrolyte membrane conveying device. The electrolyte slurry is coated onto the electrolyte base membrane by the electrolyte slurry coating device to form an electrolyte membrane to be dried. The electrolyte base membrane is located on the side away from the negative electrode layer. The negative electrode layer and the electrolyte membrane to be dried are bonded together and conveyed to an oven for drying to form a negative electrode and electrolyte composite layer. The negative electrode and electrolyte composite layer are conveyed to a hot press roller for transfer through the oven. The electrolyte base membrane is removed by a film peeling roller.

[0019] Preferably, the output end of the punching device is provided with a material box.

[0020] Preferably, the positive electrode conveying device, electrolyte membrane conveying device, negative electrode conveying device, drying oven, hot press roller, film tearing roller, compaction roller, and punching device are all installed inside the glove box.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] This invention simultaneously delivers the positive electrode layer, electrolyte membrane layer, and negative electrode layer into the drying oven via a positive electrode conveying device, an electrolyte membrane conveying device, and a negative electrode conveying device, achieving simultaneous drying. The material is then directly conveyed through the drying oven to the rolling densification and cutting processes, enabling the direct preparation of battery core layers or battery cells. This achieves precise coordination of process parameters and simplifies the operation process. By using some of the devices in the equipment, single-layer preparation or transfer operations can also be achieved, allowing for the production of multiple products. Selecting appropriate production processes improves production efficiency. By placing the entire equipment within a glove box, operator safety is fully guaranteed, and product contamination is prevented, effectively increasing the yield rate. Attached Figure Description

[0023] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of the electrode integral molding equipment that is the main feature of this utility model.

[0025] Reference numerals: 1. Positive electrode conveying device; 2. Electrolyte membrane conveying device; 3. Negative electrode conveying device; 4. Drying oven; 5. Hot press roller; 6. Film tearing roller; 7. Compacting roller; 8. Punching device; 9. Material box. Detailed Implementation

[0026] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0027] Example 1

[0028] like Figure 1 As shown, the electrode integral forming equipment provided by this utility model includes: a positive electrode conveying device 1, an electrolyte membrane conveying device 2, a negative electrode conveying device 3, an oven 4, a hot press roller 5, a film tearing roller 6, a compaction roller 7, and a punching device 8; the positive electrode conveying device 1, the electrolyte membrane conveying device 2, and the negative electrode conveying device 3 are arranged in parallel upstream of the oven 4, and the positive electrode layer, the electrolyte membrane layer, and the negative electrode layer are respectively conveyed to the oven 4 through the positive electrode conveying device 1, the electrolyte membrane conveying device 2, and the negative electrode conveying device 3. At the input end, the positive electrode layer, electrolyte membrane layer, and negative electrode layer are sequentially bonded together and dried in the oven 4 to form a battery cell composite layer. The hot press roller 5, the film-tearing roller 6, the compaction roller 7, and the punching device 8 are sequentially arranged at the output end of the oven 4. The battery cell composite layer passes through the working areas of the hot press roller 5, the compaction roller 7, and the punching device 8 in sequence. A base film is provided on the side of both the positive electrode layer and the negative electrode layer away from the electrolyte membrane layer. Two film-tearing rollers 6 are symmetrically arranged on both sides of the battery cell composite layer, and the base films on both sides can be removed synchronously by the film-tearing rollers 6.

[0029] An upstream device for positive electrode conveying device 1 is provided with a positive electrode slurry coating device, through which the positive electrode slurry is coated onto the base film. An upstream device for negative electrode conveying device 3 is provided with a negative electrode slurry coating device, through which the negative electrode slurry is coated onto the base film.

[0030] An electrolyte slurry coating device is installed upstream of the electrolyte membrane conveying device 2. The electrolyte slurry is coated onto the porous support membrane through the electrolyte slurry coating device to form a composite electrolyte membrane. The positive electrode layer, the composite electrolyte membrane and the negative electrode layer are sequentially bonded together and dried in the oven 4 to form the battery cell composite layer.

[0031] The output end of the punching device 8 is equipped with a material box 9, which can directly collect the finished product.

[0032] The positive electrode conveying device 1, electrolyte membrane conveying device 2, negative electrode conveying device 3, drying oven 4, hot press roller 5, film tearing roller 6, compaction roller 7, and punching device 8 are all located inside the glove box. The entire operation process is carried out in the same environment, which can fully ensure operational safety and prevent additional pollution. The hot pressing temperature of the hot press roller 5 is controlled at around 150℃.

[0033] The working process of this application is as follows: The positive electrode slurry is coated onto the base film by the positive electrode slurry coating device, and then conveyed to the input end of the oven 4 by the positive electrode conveying device 1. The electrolyte slurry is coated onto the porous support membrane by the electrolyte slurry coating device, and then conveyed to the input end of the oven 4 by the electrolyte membrane conveying device 2. The negative electrode slurry is coated onto the base film by the negative electrode slurry coating device, and then conveyed to the input end of the oven 4 by the negative electrode conveying device 3. The three are sequentially bonded at the input end of the oven 4. The input end of the oven 4 can be equipped with guide rollers or other rollers to ensure that the three are bonded without misalignment. The drying temperature of the oven 4 is about 60°C. The output end of the oven 4 outputs a battery cell layer with base films on both sides. Therefore, after being hot-pressed by the hot pressing roller 5, the base films on both sides need to be removed by the film-peeling rollers 6 on both sides, and then compacted by the compaction roller 7. It then enters the punching device 8 for punching to form a battery cell layer of the required size. In subsequent operations, the battery core layer can be directly placed on the current collector to prepare a single battery cell.

[0034] Variation Example 1

[0035] Based on Example 1, this application can also directly coat the positive and negative electrode slurries onto the current collector to form a battery cell with a current collector.

[0036] An upstream device for positive electrode conveying 1 is a positive electrode slurry coating device. The positive electrode slurry is coated onto the current collector using this device to form a positive electrode layer with a current collector. An upstream device for negative electrode conveying 3 is a negative electrode slurry coating device. The negative electrode slurry is coated onto the current collector using this device to form a negative electrode layer with a current collector. Neither the positive nor negative electrode layers with current collectors pass through the working area of ​​the film-peeling roller 6.

[0037] The electrolyte membrane conveying device 2 is equipped with an electrolyte slurry coating device, which coats the electrolyte slurry onto the positive electrode layer with current collector or the negative electrode layer with current collector.

[0038] The working process of this application is as follows: the positive electrode slurry is coated onto the current collector by the positive electrode slurry coating device, and then transported to the input end of the oven 4 by the positive electrode conveying device 1. The negative electrode slurry is coated onto the current collector by the negative electrode slurry coating device, and then transported to the input end of the oven 4 by the negative electrode conveying device 3. At this time, the electrolyte slurry can be applied in the manner described in Example 1, where the electrolyte slurry is coated onto the porous support membrane by the electrolyte slurry coating device, and then transported to the input end of the oven 4 by the electrolyte membrane conveying device 2; alternatively, the electrolyte slurry can be directly coated onto the positive electrode layer with the current collector or the negative electrode layer with the current collector, and then directly bonded to the other electrode layer without electrolyte slurry coating and transported into the oven 4. Since the current collector is part of the battery cell and does not need to be removed like the base film in Example 1, in this embodiment, the film-peeling roller 6 does not participate in the operation. After being hot-pressed by the hot-pressing roller 5, it is directly compacted by the compaction roller 7 and enters the punching device 8 for punching to produce battery cells of the required size.

[0039] In subsequent battery manufacturing, this embodiment can be combined with Example 1, where battery cells with current collectors and battery core layers without current collectors are stacked sequentially to form a battery pack.

[0040] Variation Example 2

[0041] Based on Example 1 or Variation 1, this application can also directly prepare the positive and negative electrodes and electrolyte into a dry film, and then dry and hot press it to form a battery cell.

[0042] The positive electrode layer includes a positive electrode dry film, the electrolyte membrane layer includes an electrolyte dry film, and the negative electrode layer includes a negative electrode dry film. The positive electrode dry film, the electrolyte dry film, and the negative electrode dry film are sequentially bonded together to form a dry film battery cell composite layer. The dry film battery cell composite layer does not pass through the working area of ​​the film-tearing roller 6.

[0043] Variation Example 3

[0044] Based on Example 1, this application can also be used only for the transfer process, which can be to transfer the positive and negative electrode layers to the current collector, or to transfer the electrolyte layer to the positive and negative electrodes. Depending on actual production needs, only some devices in the system can be used.

[0045] An electrolyte slurry coating device is installed upstream of the electrolyte membrane conveying device 2. The electrolyte slurry is coated onto the electrolyte base membrane by the electrolyte slurry coating device to form an electrolyte membrane to be dried. The electrolyte base membrane is located on the side away from the positive electrode layer. The positive electrode layer and the electrolyte membrane to be dried are bonded together and conveyed to the drying oven 4. The drying oven 4 forms a positive electrode and electrolyte composite layer. The positive electrode and electrolyte composite layer are conveyed to the hot press roller 5 for transfer through the drying oven 4. The electrolyte base membrane is removed by the film peeling roller 6.

[0046] An electrolyte slurry coating device is installed upstream of the electrolyte membrane conveying device 2. The electrolyte slurry is coated onto the electrolyte base membrane by the electrolyte slurry coating device to form an electrolyte membrane to be dried. The electrolyte base membrane is set on the side away from the negative electrode layer. The negative electrode layer and the electrolyte membrane to be dried are bonded together and conveyed to the drying oven 4. The drying oven 4 forms a negative electrode and electrolyte composite layer. The negative electrode and electrolyte composite layer are conveyed to the hot press roller 5 for transfer through the drying oven 4. The electrolyte base membrane is removed by the film peeling roller 6.

[0047] In summary, the electrode integrated molding equipment of this application can directly produce various products such as battery cells and battery core layers. Appropriate production processes can be selected according to actual production needs, and unified control through a back-end control system enables precise coordination of process parameters, greatly improving production efficiency and ensuring the consistency of electrode quality. All operations in this application are completed within a glove box, fully guaranteeing personnel safety and preventing product contamination, thus effectively improving the yield rate.

[0048] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0049] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. An electrode integral forming equipment, characterized in that, include: Positive electrode conveying device (1), electrolyte membrane conveying device (2), negative electrode conveying device (3), drying oven (4), hot press roller (5), film tearing roller (6), compaction roller (7), and punching device (8); The positive electrode conveying device (1), electrolyte membrane conveying device (2), and negative electrode conveying device (3) are arranged in parallel upstream of the oven (4). The positive electrode layer, electrolyte membrane layer, and negative electrode layer are conveyed to the input end of the oven (4) through the positive electrode conveying device (1), electrolyte membrane conveying device (2), and negative electrode conveying device (3), respectively. The positive electrode layer, electrolyte membrane layer, and negative electrode layer are sequentially bonded together and dried in the oven (4) to form a battery cell composite layer. The hot press roller (5), film tearing roller (6), compaction roller (7), and punching device (8) are sequentially arranged at the output end of the oven (4). The battery cell composite layer passes through the working areas of the hot press roller (5), compaction roller (7), and punching device (8) in sequence. Both the positive electrode layer and the negative electrode layer have a base film on the side away from the electrolyte membrane layer. Two tear-off rollers (6) are symmetrically arranged on both sides of the battery cell composite layer. The base films on both sides can be removed synchronously by the tear-off rollers (6).

2. The electrode integral forming equipment as described in claim 1, characterized in that, A positive electrode slurry coating device is provided upstream of the positive electrode conveying device (1), and the positive electrode slurry is coated onto the base film through the positive electrode slurry coating device; An anode slurry coating device is provided upstream of the anode conveying device (3), and the anode slurry is coated onto the base film through the anode slurry coating device.

3. The electrode integral forming equipment as described in claim 2, characterized in that, An electrolyte slurry coating device is provided upstream of the electrolyte membrane conveying device (2). The electrolyte slurry is coated onto the porous support membrane through the electrolyte slurry coating device to form a composite electrolyte membrane. The positive electrode layer, the composite electrolyte membrane and the negative electrode layer are sequentially bonded together and dried in an oven (4) to form a battery cell composite layer.

4. The electrode integral forming equipment as described in claim 1, characterized in that, An electrode slurry coating device is provided upstream of the positive electrode conveying device (1). The positive electrode slurry is coated onto the current collector by the positive electrode slurry coating device to form a positive electrode layer with current collector. A negative electrode slurry coating device is provided upstream of the negative electrode conveying device (3). The negative electrode slurry is coated onto the current collector by the negative electrode slurry coating device to form a negative electrode layer with the current collector. The working areas of the current collector positive electrode layer and the current collector negative electrode layer do not pass through the film tearing roller (6).

5. The electrode integral forming equipment as described in claim 4, characterized in that, The electrolyte membrane transport device (2) is equipped with an electrolyte slurry coating device, which coats the electrolyte slurry onto the positive electrode layer with current collector or the negative electrode layer with current collector through the electrolyte slurry coating device.

6. The electrode integral forming equipment as described in claim 1, characterized in that, The positive electrode layer includes a positive electrode dry film, the electrolyte membrane layer includes an electrolyte dry film, and the negative electrode layer includes a negative electrode dry film. The positive electrode dry film, the electrolyte dry film, and the negative electrode dry film are sequentially bonded together to form a dry film battery cell composite layer. The dry film battery cell composite layer does not pass through the working area of ​​the film-tearing roller (6).

7. The electrode integral forming equipment as described in claim 1, characterized in that, An electrolyte slurry coating device is provided upstream of the electrolyte membrane conveying device (2). The electrolyte slurry is coated onto the electrolyte base membrane by the electrolyte slurry coating device to form an electrolyte membrane to be dried. The electrolyte base membrane is located on the side away from the positive electrode layer. The positive electrode layer and the electrolyte membrane to be dried are bonded together and conveyed to the oven (4). The positive electrode and electrolyte composite layer are dried by the oven (4) to form a positive electrode and electrolyte composite layer. The positive electrode and electrolyte composite layer are conveyed to the hot press roller (5) for transfer by the oven (4). The electrolyte base membrane is removed by the film peeling roller (6).

8. The electrode integral forming equipment as described in claim 1, characterized in that, An electrolyte slurry coating device is provided upstream of the electrolyte membrane conveying device (2). The electrolyte slurry is coated onto the electrolyte base membrane by the electrolyte slurry coating device to form an electrolyte membrane to be dried. The electrolyte base membrane is located on the side away from the negative electrode layer. The negative electrode layer and the electrolyte membrane to be dried are bonded together and conveyed to the oven (4). The negative electrode and electrolyte composite layer are dried by the oven (4) to form a negative electrode and electrolyte composite layer. The negative electrode and electrolyte composite layer are conveyed to the hot press roller (5) for transfer by the oven (4). The electrolyte base membrane is removed by the film peeling roller (6).

9. The electrode integral forming equipment as described in claim 1, characterized in that, The output end of the punching device (8) is provided with a material box (9).

10. The electrode integral forming equipment as described in claim 1, characterized in that, The positive electrode conveying device (1), electrolyte membrane conveying device (2), negative electrode conveying device (3), drying oven (4), hot press roller (5), film tearing roller (6), compaction roller (7) and punching device (8) are all installed inside the glove box.

Images