Method and device for extracting lithium battery diaphragm

Abstract

The invention relates to an extraction method of a lithium battery diaphragm. The extraction method is realized through an extraction device of the lithium battery diaphragm. The extraction device for the lithium battery diaphragm comprises an extraction tank, an upper row of rollers, a lower row of rollers and a lifting mechanism, the upper row roller is connected with the lifting mechanism; each of the upper row of rollers and the lower row of rollers comprises a plurality of rollers; the extraction method of the lithium battery diaphragm comprises the steps that the lithium battery diaphragm horizontally penetrates through the position between the upper row of rollers and the lower row of rollers, the upper row of rollers and the lower row of rollers are arranged above the liquid level of extraction liquid in the extraction tank in a staggered and parallel mode, and the upper row of rollers are installed above the lower row of rollers; the lifting mechanism is used for controlling each roller of the upper row of rollers to descend into the extraction liquid in the extraction tank, so that the lithium battery diaphragm is immersed into the extraction liquid to be extracted. According to the method, the membrane penetrating mode can be improved, extraction liquid cannot be brought out in the membrane penetrating process, safety is higher, meanwhile, the flanging operation is reduced, and the membrane penetrating efficiency and the extraction abnormity treatment efficiency are improved.

Description

Technical Field

[0001] The present application relates to the technical field of lithium battery separators, and in particular to a method and device for extracting lithium battery separators. Background Art

[0002] Lithium battery wet-process diaphragms need to be degreased by an extraction device to form an oil-free finished diaphragm. The traditional extraction device structure consists of an upper row of rollers, a lower row of rollers and a passing roller. During the membrane penetration process, the diaphragm always passes through the extract, which will bring out the extract, posing a safety hazard. The thick edges on both sides of the membrane are easy to be flanging, and manual measures are required to perform the flanging work. If the film is broken or other abnormal conditions occur, the processing time is long. Usually, flanging takes about 15-20 minutes, and broken film or other abnormal conditions require 30-60 minutes, or even longer processing time. Summary of the invention

[0003] The present application provides a method for extracting a lithium battery separator to solve the problems in the above-mentioned background technology.

[0004] In a first aspect, the present application provides a method for extracting a lithium battery separator, which is implemented by an extraction device for a lithium battery separator; the extraction device for a lithium battery separator comprises an extraction tank, an upper row of rollers, a lower row of rollers, and a lifting mechanism; the upper row of rollers is connected to the lifting mechanism; the upper row of rollers and the lower row of rollers each comprise a plurality of rollers;

[0005] The method for extracting the lithium battery separator comprises:

[0006] The lithium battery separator passes horizontally between the upper row of rollers and the lower row of rollers, wherein the upper row of rollers and the lower row of rollers are arranged in parallel above the liquid level of the extract in the extraction tank, and the upper row of rollers is installed above the lower row of rollers;

[0007] The lifting mechanism controls each roller of the upper row of rollers to descend into the extraction liquid in the extraction tank, so that the lithium battery separator is immersed in the extraction liquid for extraction.

[0008] Furthermore, before the lithium battery separator passes horizontally between the upper row of rollers and the lower row of rollers, the method further comprises:

[0009] Pour the extraction liquid into the extraction tank, and arrange the upper row rollers and the lower row rollers in parallel and staggered above the liquid level of the extraction liquid, and the upper row rollers are installed above the lower row rollers.

[0010] Furthermore, after the lifting mechanism controls each roller of the upper row of rollers to descend into the extracting liquid in the extraction tank so that the lithium battery separator is immersed in the extracting liquid for extraction, the method further includes:

[0011] When an abnormal situation occurs in the extraction of the lithium battery diaphragm, the lifting mechanism controls the rollers of the upper row of rollers to rise above the liquid level of the extraction liquid, so that the lithium battery diaphragm is lifted out of the extraction liquid, wherein the abnormal situation includes film breakage, roller winding and equipment failure.

[0012] Furthermore, the extraction method of the lithium battery separator also includes:

[0013] The lifting mechanism adjusts each roller of the upper row of rollers to descend to a position within the extraction liquid in the extraction tank, so that the lithium battery separator achieves different extraction effects.

[0014] Furthermore, the extraction method of the lithium battery separator also includes:

[0015] When the upper roller or the lower roller fails, the upper roller or the lower roller is cleaned and repaired without emptying the extraction liquid.

[0016] In a second aspect, the present application provides an extraction device for a lithium battery separator, comprising an extraction tank, an upper row of rollers, a lower row of rollers, and a lifting mechanism; the upper row of rollers is connected to the lifting mechanism; the upper row of rollers and the lower row of rollers each comprise a plurality of rollers;

[0017] The upper row of rollers and the lower row of rollers are arranged in parallel and staggered above the liquid level of the extract in the extraction tank, and the upper row of rollers is installed above the lower row of rollers;

[0018] The lifting mechanism is used for:

[0019] After the lithium battery separator passes horizontally between the upper row of rollers and the lower row of rollers, each roller of the upper row of rollers is controlled to descend into the extraction liquid in the extraction tank, so that the lithium battery separator is immersed in the extraction liquid for extraction.

[0020] Furthermore, the lifting mechanism is also used for:

[0021] When an abnormal situation occurs in the extraction of the lithium battery diaphragm, each roller of the upper row of rollers is controlled to rise above the liquid level of the extraction liquid to lift the lithium battery diaphragm out of the extraction liquid, wherein the abnormal situation includes film breakage, roller winding and equipment failure.

[0022] Furthermore, the lifting mechanism is also used for:

[0023] The rollers of the upper row of rollers are adjusted to descend to positions within the extracting liquid in the extraction tank, so that the lithium battery separator can achieve different extraction effects.

[0024] The above technical solution of the present application has the following advantages:

[0025] The first aspect of the present application provides a method for extracting lithium battery diaphragms. The upper and lower rollers are arranged in parallel and offset above the liquid level of the extract in the extraction tank, and the upper rollers are installed above the lower rollers. After the lithium battery diaphragm passes horizontally between the upper and lower rollers, the lifting mechanism controls the rollers of the upper rollers to descend into the extract in the extraction tank, so that the lithium battery diaphragm is immersed in the extract for extraction. The lithium battery diaphragm does not pass through the extract during the membrane penetration process, so the extract will not be brought out, which is safer. At the same time, the lithium battery diaphragm passes horizontally between the upper and lower rollers, avoiding curling of the thick edge, reducing the operation of flanging, and improving the efficiency of membrane penetration and handling of extraction anomalies.

[0026] It can be understood that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 Schematic diagram of the extraction device for lithium battery separator provided in this application.

[0029] Figure numerals: 1. extraction tank; 2. upper rollers; 3. lower rollers; 4. lithium battery separator; 5. liquid level of extraction liquid. DETAILED DESCRIPTION

[0030] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0031] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0032] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0033] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways. "Multiple" means "two or more".

[0034] The specific implementation methods of the present application are further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but are not intended to limit the scope of the present application.

[0035] The present application embodiment provides a method for extracting a lithium battery diaphragm, which is implemented by an extraction device for a lithium battery diaphragm. Figure 1 As shown, the extraction device for the lithium battery separator includes an extraction tank 1, an upper row of rollers 2, a lower row of rollers 3, and a lifting mechanism; the upper row of rollers 2 is connected to the lifting mechanism; the upper row of rollers 2 and the lower row of rollers 3 each include a plurality of rollers;

[0036] The method for extracting the lithium battery separator comprises:

[0037] The lithium battery separator 4 passes horizontally between the upper roller 2 and the lower roller 3, wherein the upper roller 2 and the lower roller 3 are arranged in parallel and staggered above the liquid level 5 of the extract in the extraction tank 1, and the upper roller 2 is installed above the lower roller 3;

[0038] The lifting mechanism controls each roller of the upper row of rollers 2 to descend into the extraction liquid in the extraction tank 1, so that the lithium battery separator 4 is immersed in the extraction liquid for extraction.

[0039] The roller of the upper roller 2 is designed to be liftable. When the machine is stopped, the upper roller 2 and the lower roller 3 are two rows of offset parallel rollers. When passing through the membrane, it is only necessary to horizontally pass the lithium battery separator 4 through the gap between the upper roller 2 and the lower roller 3, and the thick edge will not curl. The lifting mechanism is used to control the roller of the upper roller 2 to descend into the extract in the extraction tank 1, so that the lithium battery separator 4 is immersed in the extract to achieve the purpose of extraction.

[0040] The lithium battery separator 4 does not pass through the extraction liquid during the membrane penetration process, so the extraction liquid will not be brought out, which is safer. At the same time, the lithium battery separator 4 passes horizontally between the upper roller 2 and the lower roller 3, avoiding the curling of the thick edge, reducing the operation of flanging, and improving the efficiency of membrane penetration and handling extraction abnormalities.

[0041] In some embodiments, before the lithium battery separator 4 passes horizontally between the upper roller 2 and the lower roller 3, the process further includes:

[0042] The extraction liquid is poured into the extraction tank 1 , and the upper row rollers 2 and the lower row rollers 3 are arranged in parallel and offset above the liquid level 5 of the extraction liquid, and the upper row rollers 2 are installed above the lower row rollers 3 .

[0043] In some embodiments, after the lifting mechanism controls each roller of the upper row of rollers 2 to descend into the extraction liquid in the extraction tank 1 so that the lithium battery separator 4 is immersed in the extraction liquid for extraction, the method further includes:

[0044] When an abnormal situation occurs during the extraction of the lithium battery diaphragm 4, the lifting mechanism controls each roller of the upper row of rollers 2 to rise above the liquid level 5 of the extraction liquid, so that the lithium battery diaphragm 4 is lifted out of the extraction liquid, wherein the abnormal situation includes film breakage, roller winding and equipment failure.

[0045] In some embodiments, the method for extracting a lithium battery separator further comprises:

[0046] The lifting mechanism adjusts each roller of the upper row of rollers 2 to descend to a position within the extracting liquid in the extraction tank 1 , so that the lithium battery separator 4 achieves different extraction effects.

[0047] In some embodiments, the method for extracting a lithium battery separator further comprises:

[0048] When the upper roller 2 or the lower roller 3 fails, the upper roller 2 or the lower roller 3 is cleaned and repaired without emptying the extraction liquid.

[0049] The extraction device for the lithium battery diaphragm of the embodiment of the present application improves the membrane penetration method, and the extraction liquid will not be brought out during the membrane penetration process, which is safer. The operation of flanging is reduced, and the efficiency of membrane penetration and handling of extraction abnormalities is improved. At the same time, the height of the rollers of the upper row of rollers 2 in the extraction liquid can be adjusted to control the stroke of the lithium battery diaphragm 4 in the extraction liquid to achieve different extraction effects.

[0050] When a roller of a conventional extraction device fails, the extracting liquid in the tank must be emptied before the roller can be cleaned or repaired. The lithium battery diaphragm extraction device of the embodiment of the present application can clean and repair the roller without emptying the extracting liquid. When abnormal conditions such as film breakage, roller winding, and equipment failure occur during the extraction of the lithium battery diaphragm, the lifting mechanism controls each roller of the upper row of rollers 2 to rise above the liquid level 5 of the extracting liquid, so that the lithium battery diaphragm 4 is lifted out of the extracting liquid, thereby facilitating the handling of the abnormality.

[0051] The present application also provides a lithium battery separator extraction device, such as Figure 1 As shown, it includes an extraction tank 1, an upper row of rollers 2, a lower row of rollers 3, and a lifting mechanism; the upper row of rollers 2 is connected to the lifting mechanism; the upper row of rollers 2 and the lower row of rollers 3 each include a plurality of rollers;

[0052] The upper rollers 2 and the lower rollers 3 are arranged in parallel and staggered above the liquid level 5 of the extract in the extraction tank 1 , and the upper rollers 2 are installed above the lower rollers 3 .

[0053] The lifting mechanism is used for:

[0054] After the lithium battery separator 4 passes horizontally between the upper roller 2 and the lower roller 3, each roller of the upper roller 2 is controlled to descend into the extraction liquid in the extraction tank 1, so that the lithium battery separator 4 is immersed in the extraction liquid for extraction.

[0055] In some embodiments, the lifting mechanism is also used for:

[0056] When an abnormal situation occurs during the extraction of the lithium battery separator 4, each roller of the upper row of rollers 2 is controlled to rise above the liquid level 5 of the extraction liquid to lift the lithium battery separator 4 out of the extraction liquid, wherein the abnormal situation includes film breakage, roller winding and equipment failure.

[0057] In some embodiments, the lifting mechanism is also used for:

[0058] The rollers of the upper row of rollers 2 are adjusted to descend to positions within the extracting liquid in the extraction tank 1 , so that the lithium battery separator 4 can achieve different extraction effects.

[0059] The extraction method and device of the lithium battery diaphragm provided in the embodiment of the present application are arranged in parallel with the upper roller 2 and the lower roller 3 in an offset manner above the liquid level 5 of the extract in the extraction tank 1, and the upper roller 2 is installed above the lower roller 3. After the lithium battery diaphragm 4 passes horizontally between the upper roller 2 and the lower roller 3, the lifting mechanism controls the rollers of the upper roller 2 to descend into the extract in the extraction tank 1, so that the lithium battery diaphragm 4 is immersed in the extract for extraction. The lithium battery diaphragm 4 does not pass through the extract during the membrane penetration process, so it will not bring out the extract, which is safer. At the same time, the lithium battery diaphragm 4 passes horizontally between the upper roller 2 and the lower roller 3, avoiding the curling of the thick edge, reducing the operation of flanging, and improving the efficiency of membrane penetration and handling of extraction abnormalities.

[0060] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application.

[0061] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A method for extracting a lithium battery separator, characterized in that: This is achieved by an extraction device for a lithium battery diaphragm; the extraction device for the lithium battery diaphragm comprises an extraction tank, an upper row of rollers, a lower row of rollers, and a lifting mechanism; The upper row of rollers is connected to the lifting mechanism; the upper row of rollers and the lower row of rollers each include a plurality of rollers; The method for extracting the lithium battery separator comprises: The lithium battery separator passes horizontally between the upper row of rollers and the lower row of rollers, wherein the upper row of rollers and the lower row of rollers are arranged in parallel above the liquid level of the extract in the extraction tank, and the upper row of rollers is installed above the lower row of rollers; The lifting mechanism controls each roller of the upper row of rollers to descend into the extraction liquid in the extraction tank, so that the lithium battery separator is immersed in the extraction liquid for extraction.

2. The method for extracting a lithium battery separator according to claim 1, characterized in that: Before the lithium battery separator passes horizontally between the upper row of rollers and the lower row of rollers, the method further comprises: Pour the extraction liquid into the extraction tank, and arrange the upper row rollers and the lower row rollers in parallel and staggered above the liquid level of the extraction liquid, and the upper row rollers are installed above the lower row rollers.

3. The method for extracting a lithium battery separator according to claim 1, characterized in that: The lifting mechanism controls each roller of the upper row of rollers to descend into the extraction liquid in the extraction tank so that the lithium battery separator is immersed in the extraction liquid for extraction, and further comprises: When an abnormal situation occurs in the extraction of the lithium battery diaphragm, the lifting mechanism controls the rollers of the upper row of rollers to rise above the liquid level of the extraction liquid, so that the lithium battery diaphragm is lifted out of the extraction liquid, wherein the abnormal situation includes film breakage, roller winding and equipment failure.

4. The method for extracting a lithium battery separator according to claim 1, characterized in that: The extraction method of the lithium battery separator also includes: The lifting mechanism adjusts each roller of the upper row of rollers to descend to a position within the extraction liquid in the extraction tank, so that the lithium battery separator achieves different extraction effects.

5. The method for extracting a lithium battery separator according to claim 1, characterized in that: The extraction method of the lithium battery separator also includes: When the upper roller or the lower roller fails, the upper roller or the lower roller is cleaned and repaired without emptying the extraction liquid.

6. A lithium battery separator extraction device, characterized in that: It includes an extraction tank, an upper row of rollers, a lower row of rollers, and a lifting mechanism; the upper row of rollers is connected to the lifting mechanism; the upper row of rollers and the lower row of rollers each include a plurality of rollers; The upper row of rollers and the lower row of rollers are arranged in parallel and staggered above the liquid level of the extract in the extraction tank, and the upper row of rollers is installed above the lower row of rollers; The lifting mechanism is used for: After the lithium battery separator passes horizontally between the upper row of rollers and the lower row of rollers, each roller of the upper row of rollers is controlled to descend into the extraction liquid in the extraction tank, so that the lithium battery separator is immersed in the extraction liquid for extraction.

7. The extraction device for lithium battery separator according to claim 6, characterized in that: The lifting mechanism is also used for: When an abnormal situation occurs in the extraction of the lithium battery diaphragm, each roller of the upper row of rollers is controlled to rise above the liquid level of the extraction liquid to lift the lithium battery diaphragm out of the extraction liquid, wherein the abnormal situation includes film breakage, roller winding and equipment failure.

8. The extraction device for lithium battery separator according to claim 6, characterized in that: The lifting mechanism is also used for: The rollers of the upper row of rollers are adjusted to descend to positions within the extracting liquid in the extraction tank, so that the lithium battery separator can achieve different extraction effects.

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