Transmission mechanism of lithium battery diaphragm extraction device

Abstract

The utility model discloses a transmission mechanism of a lithium battery diaphragm extraction device, and belongs to the technical field of lithium battery production. The transmission mechanism comprises a plurality of compression roller assemblies and a plurality of transmission assemblies; the multiple pressing roller assemblies and the multiple transmission assemblies are arranged in a staggered mode in the diaphragm conveying direction. Wherein the plurality of compression roller assemblies and the plurality of extraction tanks are arranged in a one-to-one correspondence manner. According to the utility model, the plurality of compression roller assemblies and the plurality of transmission assemblies are arranged in the diaphragm conveying direction in a staggered manner, so that the liquid carrying amount is greatly reduced, the consumption of an extracting agent is reduced, and the utilization rate of the extracting agent is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production, and more specifically to a transmission mechanism of a lithium battery diaphragm extraction device. Background Art

[0002] At present, the production and sales volume of new energy vehicles in China accounts for more than 60% of the global total. The export of electric vehicles, lithium batteries and photovoltaic products as the "new three" of foreign trade has increased by nearly 30%. As an upstream industry of lithium batteries, the development and production of lithium battery separators have also received more attention. The separator industry has high industry barriers. Its technical difficulties lie in the engineering technology of pore making, basic materials, and production line manufacturing equipment. Lithium battery separators are one of the key inner components of lithium batteries. The performance of the separator determines the interface structure and internal resistance of the battery, which directly affects the battery's capacity, cycle and safety performance. The traditional lithium battery separator extraction process uses dichloromethane or tetrachloroethylene as an extractant, which is toxic and irritating and has a certain impact on the environment. Against this background, a new type of environmentally friendly extractant has been developed, which is composed of ionic liquids, has the characteristics of low carbon, environmental protection, non-toxicity, and a higher flash point, and is more suitable for industrial production. It effectively solves the problem of energy and environmental protection.

[0003] Based on the new extractant, a new extraction device needs to be redesigned. In the prior art, it is found that during the operation of the diaphragm, the traditional frame structure will cause the diaphragm to stretch and deform, easily break, easily deviate during operation, and carry the extractant into the next step during operation, affecting normal experimental production.

[0004] Therefore, how to provide a transmission mechanism for a lithium battery diaphragm extraction device to solve the problem of diaphragm tensile deformation and easy breakage is one of the technical problems that urgently need to be solved in this field. Utility Model Content

[0005] In view of this, the utility model provides a transmission mechanism for a lithium battery diaphragm extraction device, the purpose of which is to solve the problems existing in the prior art.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A transmission mechanism of a lithium battery diaphragm extraction device, wherein the lithium battery diaphragm extraction device comprises an extraction box and a plurality of extraction tanks, wherein the plurality of extraction tanks are arranged on the extraction box in a sequentially connected manner; each of the extraction tanks is filled with extraction liquid; the transmission mechanism comprises a plurality of pressure roller assemblies and a plurality of transmission assemblies; the plurality of pressure roller assemblies and the plurality of transmission assemblies are staggered along the length direction of the extraction tanks; wherein the plurality of pressure roller assemblies and the plurality of extraction tanks are arranged in a one-to-one correspondence.

[0008] Furthermore, the pressure roller assembly includes a first pressure roller and a second pressure roller; the first pressure roller is rotatably mounted on the extraction box and is located in the extraction tank; the second pressure roller is rotatably mounted on the extraction box and is located obliquely above the first pressure roller.

[0009] Further, the transmission assembly includes a first transmission shaft and a second transmission shaft; the first transmission shaft is rotatably mounted in the extraction box, and is located obliquely above the first pressure roller and away from the side of the second pressure roller; the second transmission shaft is rotatably mounted in the extraction box, and is located obliquely above the second transmission shaft and close to the side of the second pressure roller of the other pressure roller assembly.

[0010] Furthermore, a fifth transmission shaft is rotatably provided at the diaphragm outlet of the extraction box, and the fifth transmission shaft is located directly above the second transmission shaft.

[0011] Furthermore, a transmission component is provided at the diaphragm inlet of the extraction box.

[0012] Furthermore, the conveying assembly includes a third transmission shaft and a fourth transmission shaft, the third transmission shaft is rotatably disposed at the diaphragm inlet of the extraction box, the fourth transmission shaft is rotatably disposed on the extraction box, and is located on a side of the third transmission shaft away from the diaphragm inlet of the extraction box, and is located obliquely above the first pressure roller.

[0013] Compared with the prior art, the utility model has achieved the following technical effects: the utility model arranges multiple transmission shafts and pressure rollers to cooperate for traction, so that the pulling force on the diaphragm is relatively uniform, ensuring that the diaphragm is not easy to break during operation; the cross-traction of multiple transmission shafts greatly reduces the amount of liquid carried, reduces the consumption of the extractant, and improves the utilization rate of the extractant. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of a transmission mechanism of a lithium battery diaphragm extraction device of the utility model;

[0015] In the figure: 1. first pressure roller; 2. second pressure roller; 3. first transmission shaft; 4. second transmission shaft; 5. third transmission shaft; 6. fourth transmission shaft; 7. fifth transmission shaft. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] Example 1

[0018] Reference Figure 1 As shown, the utility model discloses a transmission mechanism of a lithium battery diaphragm extraction device, wherein the lithium battery diaphragm extraction device comprises an extraction box and a plurality of extraction tanks, wherein the plurality of extraction tanks are arranged on the extraction box in sequence and connected to each other; each extraction tank is filled with extraction liquid; the transmission mechanism comprises a plurality of roller assemblies and a plurality of transmission assemblies; the plurality of roller assemblies and the plurality of transmission groups are staggered along the length direction of the extraction tank; wherein the plurality of roller assemblies and the plurality of extraction tanks are arranged in a one-to-one correspondence.

[0019] Preferably, the pressure roller assembly includes a first pressure roller 1 and a second pressure roller 2; the first pressure roller 1 is rotatably mounted on the extraction box and located in the extraction tank; the second pressure roller 2 is rotatably mounted on the extraction box and located obliquely above the first pressure roller 1.

[0020] In this embodiment, the second pressing roller 2 is located at the first pressing roller 1 near the diaphragm inlet of the extraction box.

[0021] Preferably, the transmission assembly includes a first transmission shaft 3 and a second transmission shaft 4; the first transmission shaft 3 is rotatably mounted in the extraction box and is located obliquely above the first pressure roller 1 and away from the side of the second pressure roller 2; the second transmission shaft 4 is rotatably mounted in the extraction box and is located obliquely above the second transmission shaft 4 and close to the side of the second pressure roller of another pressure roller assembly.

[0022] Preferably, a fifth transmission shaft 7 is rotatably provided at the diaphragm outlet of the extraction box, and the fifth transmission shaft 7 is located directly above the second transmission shaft 4 .

[0023] Preferably, a conveying assembly is provided at the diaphragm inlet of the extraction box.

[0024] Preferably, the conveying assembly includes a third transmission shaft 5 and a fourth transmission shaft 6, the third transmission shaft 5 is rotatably disposed at the diaphragm inlet of the extraction box, the fourth transmission shaft 6 is rotatably disposed on the extraction box, and is located on the side of the third transmission shaft 5 away from the diaphragm inlet of the extraction box, and is located obliquely above the first pressure roller 1.

[0025] In other embodiments, a plurality of extraction boxes are provided, and the plurality of extraction boxes are sequentially arranged and connected along the diaphragm conveying direction; wherein a diaphragm inlet of an extraction box is connected to a diaphragm outlet of another extraction box.

[0026] Working principle: The diaphragm is cross-set on the pressure roller and the transmission shaft along the transmission direction. The pressure roller assembly and the transmission assembly are misaligned to allow the extractant on the lithium battery diaphragm to flow back during operation. Multiple groups of pressure roller assemblies and transmission assemblies are arranged to meet the transmission and stretching requirements of the lithium battery diaphragm. At the same time, the problem of the diaphragm being unstable and easy to break during operation is solved. The transmission shaft is coordinated with the spatial misalignment to provide tension traction, so that the diaphragm can run smoothly and the problem of liquid carrying during operation can be reduced. Different transmission shafts give different tensions to the diaphragm, allowing the diaphragm to stretch, so that the extractant can better extract the white oil in the diaphragm, ensuring the efficiency and effect of the extraction.

[0027] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A transmission mechanism for a lithium battery diaphragm extraction device, wherein: The lithium battery diaphragm extraction device includes an extraction box and multiple extraction tanks, and the multiple extraction tanks are arranged on the extraction box in sequence; each extraction tank is filled with extraction liquid; it is characterized in that the transmission mechanism includes multiple pressure roller assemblies and multiple transmission assemblies; the multiple pressure roller assemblies and the multiple transmission assemblies are staggered along the length direction of the extraction tank; wherein the multiple pressure roller assemblies and the multiple extraction tanks are arranged in a one-to-one correspondence.

2. The transmission mechanism of the lithium battery diaphragm extraction device according to claim 1 is characterized in that: The pressure roller assembly includes a first pressure roller and a second pressure roller; the first pressure roller is rotatably mounted on the extraction box and is located in the extraction tank; the second pressure roller is rotatably mounted on the extraction box and is located obliquely above the first pressure roller.

3. The transmission mechanism of the lithium battery diaphragm extraction device according to claim 2 is characterized in that: The transmission assembly includes a first transmission shaft and a second transmission shaft; the first transmission shaft is rotatably mounted in the extraction box and is located obliquely above the first pressure roller and away from the side of the second pressure roller; the second transmission shaft is rotatably mounted in the extraction box and is located obliquely above the second transmission shaft and close to the side of the second pressure roller of the other pressure roller assembly.

4. The transmission mechanism of the lithium battery diaphragm extraction device according to claim 3 is characterized in that: A fifth transmission shaft is rotatably provided at the diaphragm outlet of the extraction box, and the fifth transmission shaft is located directly above the second transmission shaft.

5. The transmission mechanism of the lithium battery diaphragm extraction device according to claim 2 is characterized in that: A transmission component is arranged at the diaphragm inlet of the extraction box.

6. The transmission mechanism of the lithium battery diaphragm extraction device according to claim 5 is characterized in that: The conveying assembly includes a third transmission shaft and a fourth transmission shaft. The third transmission shaft is rotatably disposed at the diaphragm inlet of the extraction box, and the fourth transmission shaft is rotatably disposed on the extraction box and is located on a side of the third transmission shaft away from the diaphragm inlet of the extraction box and is located obliquely above the first pressure roller.

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