A rolling device suitable for lithium battery pole piece production

Abstract

This utility model discloses a rolling device suitable for the production of lithium battery electrode sheets, relating to the field of lithium battery electrode sheet production technology. The rolling device includes a base plate, with a rolling mill fixedly installed on top of the base plate. A baking mechanism is also provided above the base plate: a limiting assembly, including a housing fixedly installed on top of the base plate. A conveyor motor is fixedly installed on one side of the housing. A guide plate is fixedly installed inside the housing, and a rubber strip is fixedly installed on one side of the guide plate. An electric heating tube is fixedly installed on the inclined surface of the guide plate. A telescopic rod is fixedly installed inside the housing. The rubber strips above and below the long openings on both sides of the housing are in close contact with the limiting roller to form a sealing structure, restricting high-temperature air to escape only from the gap between the electrode sheet and the limiting roller. This forces the hot air to fully contact the electrode sheet within the housing, avoiding localized airflow short-circuiting, thereby ensuring uniform heating of all areas of the electrode sheet along the transmission direction.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery electrode production technology, specifically a rolling device suitable for lithium battery electrode production. Background Technology

[0002] Roll forming equipment is a key link in the production of lithium battery electrodes to "improve quality, increase efficiency, and reduce losses." Its performance directly affects the physical properties and electrical performance of the electrodes and the overall quality of the subsequent batteries. It is the core equipment to ensure the high energy density, high safety, and long life of lithium batteries.

[0003] The existing utility model patent with publication number CN211376809U discloses an electrode rolling device, which includes a roller assembly, a support assembly, and a rebound oven. The roller assembly includes an upper roller and a lower roller to roll the electrode. The support assembly is set on the transmission path of the electrode to support it. By setting the rebound oven on the transmission path of the electrode and placing it downstream of the roller assembly, the electrode is baked in the rebound oven as it passes through. That is, the electrode after being rolled by the roller assembly can be baked in the rebound oven during its transmission, which avoids the separate baking process after rolling. In other words, this electrode rolling device can directly perform a second rolling on the electrode after the first rolling, thereby shortening the time of the first stage of electrode manufacturing and thus shortening the entire lithium battery manufacturing cycle.

[0004] The aforementioned electrode rolling device only monitors the ambient temperature inside the chamber and does not directly detect the surface temperature of the electrode. Due to differences in electrode thickness and material (such as coating density), their heat absorption efficiency varies, which may lead to a situation where "the chamber temperature meets the standard, but the electrode does not actually reach the baking temperature," resulting in the failure of rebound control. At the same time, when the baking component uses the air outlet of the tube to deliver air, if there are differences in the wind speed and temperature of multiple air outlets (such as uneven pipe resistance or fan pressure fluctuations), it will cause different areas of the electrode to be heated inconsistently along the transmission direction, resulting in local over- or under-rebound problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a rolling device suitable for lithium battery electrode production, which solves the problems of inconsistent heating and electrode temperature not meeting standards.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A rolling device suitable for lithium battery electrode production includes a base plate, a rolling mill fixedly mounted on top of the base plate, and a baking mechanism disposed above the base plate.

[0007] The limiting assembly includes a housing fixedly installed above a base plate. A conveyor motor is fixedly installed on one side of the housing. A guide plate is fixedly installed inside the housing. A rubber strip is fixedly installed on one side of the guide plate. An electric heating tube is fixedly installed on the inclined surface of the guide plate. A telescopic rod is fixedly installed inside the housing. A spring is inserted through the outside of the telescopic rod. A slider is fixedly installed at the bottom end of the telescopic rod. A limiting roller is inserted through one side of the slider. Limiting rings are installed at equal intervals on the outside of the limiting roller. An infrared temperature measurement module is fixedly installed inside the housing.

[0008] The heating element, located above the base plate, is used to deliver high-temperature air into the chamber.

[0009] Preferably, the heating assembly includes a heating tube fixedly installed above the base plate, an electric heating plate fixedly installed inside the heating tube, an air pump connected to the rear side of the heating tube, and a delivery pipe fixedly installed at the exhaust end of the air pump.

[0010] Preferably, the shaft of the conveyor motor is fixedly connected to one end of a limiting roller, the limiting roller is rotatably connected to the housing and the slider, the limiting ring is equidistantly installed on the outside of the limiting roller, and one side of the rubber strip is provided with a protrusion matching the spacing of the limiting ring.

[0011] Preferably, the adhesive strip is also installed on the upper and lower sides of the long strip openings on both sides of the box body. The adhesive strip is in contact with the limiting roller. The guide plate is symmetrically installed inside the box body, both vertically and horizontally. The heating tube is equidistantly installed above the inclined surface of the guide plate.

[0012] Preferably, the rear end of the heating tube has a tapered structure, the pipe structure at the rear end of the heating tube is connected to the air inlet of the air pump, and two branch pipes are provided above the delivery pipe.

[0013] Preferably, the branch at the top of the conveying pipe passes through the top of the box and is located at the center of the top guide plate inside the box, while the branch at the bottom passes through the bottom of the box and is located at the center of the bottom guide plate inside the box. Beneficial effects

[0014] This invention provides a rolling device suitable for the production of lithium battery electrode sheets. Compared with the prior art, it has the following advantages:

[0015] (1) This rolling device for lithium battery electrode production heats air through an electric heating plate inside a heating tube. The air pump then delivers the high-temperature air to the housing via a conveying pipe. The upper and lower branches of the conveying pipe precisely align with the centers of the top and bottom guide plates inside the housing, ensuring that the high-temperature air enters from symmetrical positions on both sides of the electrode. The guide plates inside the housing are symmetrically distributed vertically and horizontally, allowing for uniform flow of the incoming high-temperature air. Simultaneously, the electric heating tubes on the inclined surfaces of the guide plates further heat the air, improving the temperature stability of the hot air. Furthermore, the rubber strips above and below the long openings on both sides of the housing form a sealed structure in close contact with the limiting rollers, restricting the high-temperature air to only exit through the gap between the electrode and the limiting rollers. This forces the hot air to fully contact the electrode within the housing, preventing localized airflow short-circuiting and ensuring consistent heating across all areas of the electrode along the transmission direction.

[0016] (2) This rolling device, suitable for lithium battery electrode production, can directly detect the surface temperature of the electrode through an infrared temperature measurement module fixedly installed inside the box, rather than just monitoring the ambient temperature inside the box, thus accurately reflecting the actual heating state of the electrode. When the electrode thickness and material are different, resulting in differences in heat absorption efficiency, the infrared temperature measurement module can capture temperature changes in real time. At the same time, the electric heating plate in the heating assembly continuously heats the air, the air pump stably delivers high-temperature air, and the electric heating tube on the guide plate assists in heating, with multiple parties working together to provide a stable heat source. In the limiting assembly, the spring on the outside of the telescopic rod pushes the slider to clamp the electrode with the limiting roller, and with the limiting ring, ensures stable transmission of the electrode inside the box, allowing the electrode sufficient time to absorb heat. Combined with the real-time monitoring of the infrared temperature measurement module, the heating power can be adjusted in time to avoid the situation where "the box temperature meets the standard but the electrode temperature does not actually reach the baking temperature", ensuring that the electrode temperature meets the requirements. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the guide plate installation structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the installation structure of the limiting roller of this utility model;

[0020] Figure 4 This is a schematic diagram of the air pump installation structure of this utility model;

[0021] In the diagram: 1. Base plate; 11. Roller press; 2. Baking mechanism; 21. Limiting component; 211. Box body; 212. Conveyor motor; 213. Guide plate; 214. Rubber strip; 215. Heating tube; 216. Telescopic rod; 217. Spring; 218. Slider; 219. Limiting roller; 2110. Limiting ring; 2111. Infrared temperature measurement module; 22. Heating component; 221. Heating tube; 222. Heating plate; 223. Air pump; 224. Conveying pipe. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 This utility model provides a technical solution: a rolling device suitable for the production of lithium battery electrode sheets, including a base plate 1, a rolling press 11 fixedly installed above the base plate 1, and a baking mechanism 2 provided above the base plate 1.

[0024] The limiting assembly 21 includes a housing 211 fixedly installed above the base plate 1. A conveyor motor 212 is fixedly installed on one side of the housing 211. A guide plate 213 is fixedly installed inside the housing 211. A rubber strip 214 is fixedly installed on one side of the guide plate 213. An electric heating tube 215 is fixedly installed on the inclined surface of the guide plate 213. A telescopic rod 216 is fixedly installed inside the housing 211. A spring 217 is inserted through the outside of the telescopic rod 216. A slider 218 is fixedly installed at the bottom end of the telescopic rod 216. A limiting roller 219 is inserted through one side of the slider 218. Limiting rings 2110 are equidistantly installed on the outside of the limiting roller 219. An infrared temperature measurement module 2111 is fixedly installed inside the box. The shaft of the conveyor motor 212 is fixedly connected to one end of a limiting roller 219. The limiting roller 219 is rotatably connected to the box body 211 and the slider 218. The limiting ring 2110 is equidistantly installed on the outside of the limiting roller 219. One side of the rubber strip 214 is provided with a protrusion that matches the spacing of the limiting ring 2110. The rubber strip 214 is also installed on the upper and lower sides of the long strip openings on both sides of the box body 211. The rubber strip 214 contacts the limiting roller 219. The guide plate 213 is symmetrically installed inside the box body 211, and the electric heating tube 215 is equidistantly installed above the inclined surface of the guide plate 213.

[0025] Specifically, the roller press 11 can press the electrode raw material. After being pressed, the raw material enters the housing 211 between the limiting rollers 219 at one end of the housing 211. The limiting ring 2110 on the outside of the limiting roller 219 contacts the pressed electrode, leaving a gap between the electrode and the limiting roller 219 for the internal gas to escape. The spring 217 on the outside of the telescopic rod 216 clamps the electrode between the upper and lower limiting rollers 219, increasing the friction between the electrode and the limiting ring 2110 so that the conveying motor 212 can drive the electrode to move when it drives the limiting roller 219 to rotate. The rubber strip 214 restricts the gas to escape only through the gap between the electrode and the limiting roller 219.

[0026] Heating component 22, located above base plate 1, is used to deliver high-temperature air to the interior of housing 211. Heating component 22 includes heating pipe 221 fixedly installed above base plate 1. Heating plate 222 is fixedly installed inside heating pipe 221. Air pump 223 is connected to the rear side of heating pipe 221. Delivery pipe 224 is fixedly installed at the exhaust end of air pump 223. The rear end of heating pipe 221 has a conical structure. The pipe structure at the rear end of heating pipe 221 is connected to the air inlet end of air pump 223. Two branch pipes are provided above delivery pipe 224. The top branch of delivery pipe 224 passes through the top of housing 211 and is located at the center of top guide plate 213 inside housing 211. The bottom branch passes through the bottom of housing 211 and is located at the center of bottom guide plate 213 inside housing 211.

[0027] Specifically, the heating plate 222 inside the heating tube 221 can heat the air. The heated air is introduced into the interior of the delivery pipe 224 through the air pump 223. The gas is delivered from the upper and lower sides of the housing 211 into the housing 211 through the delivery pipe 224 to heat the upper and lower sides of the electrode.

[0028] Specifically, the air pump 223 is model XGB-8, the conveyor motor 212 is model 180TM-20010F5-C, and the infrared temperature measurement module 2111 is model D6T. In addition, all contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0029] During operation, the electrode sheet is first rolled by the roller press 11 above the base plate 1. After rolling, the electrode sheet enters the limiting assembly 21 through the long strip opening on one side of the housing 211. At this time, the conveying motor 212 starts, and its shaft drives the limiting roller 219 to rotate. The limiting ring 2110 on the outside of the limiting roller 219 contacts the electrode sheet. At the same time, the spring 217 sleeved on the outside of the telescopic rod 216 inside the housing 211 pushes the slider 218 through elastic force, so that the upper and lower limiting rollers 219 clamp the electrode sheet to increase friction. The rotation of the limiting roller 219 and the electrode sheet are rotated to achieve stable conveying. Meanwhile, the heating assembly 22 starts to work. The electric heating plate 222 inside the heating tube 221 heats the air. The air pump 223 draws in the high-temperature air from the heating tube 221 and delivers it through the conveying pipe 224. The top and bottom branches of the conveying pipe 224 pass through the top and bottom of the housing 211, respectively, delivering high-temperature air to the center of the top guide plate 213 and the center of the bottom guide plate 213 inside the housing 211. The high-temperature air is guided by the guide plates 213, which are symmetrically installed vertically and mirrored horizontally. At the same time, the electric heating tubes 215 on the inclined surface of the guide plates 213 further assist in heating the air. The rubber strips 214 installed on the upper and lower sides of the long strip openings on both sides of the housing 211 contact the limiting rollers 219 to form a seal, so that the high-temperature air can only be discharged from the gap between the electrode and the limiting rollers 219, ensuring that the electrode is heated evenly. The infrared temperature measurement module 2111 inside the housing 211 monitors the surface temperature of the electrode in real time to ensure that the electrode baking temperature reaches the standard. Finally, the baked electrode is sent out from the other side of the housing 211.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rolling device suitable for the production of lithium battery electrode sheets, comprising a base plate (1), characterized in that: A roller press (11) is fixedly installed above the base plate (1), and a baking mechanism (2) is provided above the base plate (1). The limiting assembly (21) includes a box (211) fixedly installed above the base plate (1). A conveyor motor (212) is fixedly installed on one side of the box (211). A guide plate (213) is fixedly installed inside the box (211). A rubber strip (214) is fixedly installed on one side of the guide plate (213). An electric heating tube (215) is fixedly installed on the inclined surface of the guide plate (213). A telescopic rod (216) is fixedly installed inside the box (211). A spring (217) is inserted through the outside of the telescopic rod (216). A slider (218) is fixedly installed at the bottom end of the telescopic rod (216). A limiting roller (219) is inserted through one side of the slider (218). Limiting rings (2110) are installed at equal intervals on the outside of the limiting roller (219). An infrared temperature measuring module (2111) is fixedly installed inside the box (211). Heating component (22) is located above the base plate (1) to deliver high-temperature air into the chamber (211).

2. The rolling device for lithium battery electrode production according to claim 1, characterized in that: The heating assembly (22) includes a heating tube (221) fixedly installed above the base plate (1), an electric heating plate (222) fixedly installed inside the heating tube (221), an air pump (223) connected to the rear side of the heating tube (221), and a delivery pipe (224) fixedly installed at the exhaust end of the air pump (223).

3. A rolling device for lithium battery electrode production according to claim 1, characterized in that: The shaft of the conveyor motor (212) is fixedly connected to one end of a limiting roller (219). The limiting roller (219) is rotatably connected to the housing (211) and the slider (218). The limiting ring (2110) is equidistantly installed on the outside of the limiting roller (219). One side of the rubber strip (214) is provided with a protrusion that matches the spacing of the limiting ring (2110).

4. A rolling device for lithium battery electrode production according to claim 1, characterized in that: The adhesive strip (214) is also installed on the upper and lower sides of the long strip opening on both sides of the box body (211). The adhesive strip (214) is in contact with the limiting roller (219). The guide plate (213) is symmetrically installed in the upper and lower and mirror-symmetrically installed in the left and right sides of the box body (211). The electric heating tube (215) is installed at equal intervals above the inclined surface of the guide plate (213).

5. A rolling device for lithium battery electrode production according to claim 2, characterized in that: The rear end of the heating tube (221) is a tapered structure. The pipe structure at the rear end of the heating tube (221) is connected to the air inlet of the air pump (223). Two branch pipes are provided above the delivery pipe (224).

6. A rolling device for lithium battery electrode production according to claim 2, characterized in that: The branch at the top of the conveying pipe (224) passes through the top of the box (211) and is located at the center of the top guide plate (213) inside the box (211), while the bottom branch passes through the bottom of the box (211) and is located at the center of the bottom guide plate (213) inside the box (211).

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