Diaphragm demagnetizing device and lithium battery diaphragm production equipment

Abstract

This application relates to the technical field of lithium battery separator production equipment, and more specifically to a separator demagnetizing device and lithium battery separator production equipment. The separator demagnetizing device includes a fixed bracket, a connector, a magnetic adsorption assembly, and a driving mechanism. The fixed bracket is mounted on the frame of the lithium battery separator production equipment; the connector is mounted on the fixed bracket; the magnetic adsorption assembly is used to adsorb magnetic materials on the separator surface; the magnetic adsorption assembly includes a first magnetic element and a second magnetic element, with a gap between the second magnetic element and the first magnetic element for the separator to pass through; the driving mechanism is used to drive the first magnetic element and / or the second magnetic element to move in a second direction to adjust the size of the gap. The magnetic adsorption assembly can adsorb magnetic materials on the separator, thereby achieving the purpose of cleaning the membrane surface. The driving mechanism can flexibly adjust the size of the gap, which can improve the adaptability of the separator demagnetizing device, ensure the adsorption effect, and effectively protect the magnetic adsorption assembly.

Description

Technical Field

[0001] This application relates to the technical field of lithium battery separator production equipment, and more specifically to a separator demagnetizing device and lithium battery separator production equipment. Background Technology

[0002] Lithium-ion batteries are representative of modern high-performance batteries, mainly composed of positive electrode materials, negative electrode materials, separators, and electrolytes. Among them, the lithium battery separator is a thin film with a microporous structure and is a key component in the lithium-ion battery industry chain. From PP raw material particles to the final finished product with a thickness of several micrometers and a width that meets the requirements, the lithium battery separator must go through the steps of molding, stretching, and slitting. The application of the separator dictates that it must be free of magnetic materials on its surface before reaching the battery assembly process.

[0003] However, during the membrane production process, friction between components generates magnetic materials (such as iron filings and magnetic metal particles). These magnetic materials are adsorbed onto the membrane surface. If the magnetic materials on the membrane surface are not cleaned during the manufacturing process, the lithium-ion battery may experience a short circuit during use, thus affecting the product's safety and lifespan. Utility Model Content

[0004] This application provides a membrane demagnetizing device and lithium battery membrane production equipment, which can at least partially solve or improve the above-mentioned technical problems.

[0005] This application provides a diaphragm demagnetizing device, comprising:

[0006] Two fixed brackets are mounted on the frame of the lithium battery separator production equipment.

[0007] Two connectors are mounted on the fixed bracket in a one-to-one correspondence; each connector has a first end and a second end opposite to each other along a first direction, and each connector has a first surface and a second surface opposite to each other along a second direction, wherein the first direction and the second direction are perpendicular to each other;

[0008] A magnetic adsorption assembly, disposed between two connecting members, is used to adsorb magnetic material on the surface of a diaphragm; the magnetic adsorption assembly includes a first magnetic element and a second magnetic element, the first magnetic element being mounted on the first surface at the first end; the second magnetic element being mounted on the second surface at the second end, such that a gap is formed between the second magnetic element and the first magnetic element, the gap allowing the diaphragm to pass through; and

[0009] A driving mechanism is provided for driving the first magnetic element and / or the second magnetic element to move along the second direction to adjust the size of the gap.

[0010] In some alternative embodiments, both the first magnetic element and the second magnetic element are constructed as magnetic planar plate structures, and the first magnetic element and the second magnetic element are arranged parallel to each other.

[0011] In some optional embodiments, the driving mechanism includes a first driving member and a second driving member, wherein the first driving member is connected to the first magnetic member and is used to drive the first magnetic member to move along the second direction; the second driving member is connected to the second magnetic member and is used to drive the second magnetic member to move along the second direction.

[0012] In some alternative embodiments, the first drive element and the second drive element include a linear motion cylinder or a linear motor.

[0013] In some optional embodiments, the diaphragm demagnetizing device further includes a guiding mechanism, which includes a guide groove and a slide rod. One of the guide groove and the slide rod is disposed on the connector, and the other is disposed on the first magnetic element and / or the second magnetic element. The slide rod is slidably connected to the guide groove.

[0014] In some optional embodiments, the guide groove includes a first guide groove and a second guide groove, the first guide groove and the second guide groove being respectively disposed at the first end and the second end, and both penetrating the connector along the second direction; the slide rod includes a first slide rod and a second slide rod both extending along the second direction, the first slide rod being connected to the first magnetic element, and the first slide rod being slidably disposed in the first guide groove; the second slide rod being connected to the second magnetic element, and the second slide rod being slidably disposed in the second guide groove.

[0015] In some optional embodiments, the fixed bracket is provided with an arc-shaped groove, the connector is detachably installed in the arc-shaped groove by fasteners, and the connector can move along the extension direction of the arc-shaped groove to adjust the installation angle of the connector and the magnetic adsorption assembly.

[0016] In some alternative embodiments, the first magnetic element and the second magnetic element have opposite magnetic properties.

[0017] This application also provides a lithium battery separator production equipment, including the separator demagnetizing device described above.

[0018] In some optional embodiments, the diaphragm production equipment is at least one of a diaphragm stretching machine, a diaphragm winding machine, and a diaphragm slitting machine.

[0019] The diaphragm demagnetizing device according to this embodiment includes a magnetic adsorption assembly composed of a first magnetic component and a second magnetic component. The magnetic adsorption assembly can adsorb magnetic substances on the passing diaphragm, thereby achieving the purpose of cleaning the membrane surface. Since it also includes a driving mechanism for driving the first and / or second magnetic components to move, the gap size can be flexibly adjusted. On the one hand, this can adapt to diaphragms of different sizes, improving the adaptability of the diaphragm demagnetizing device; on the other hand, the adsorption effect can be ensured through gap adjustment. Furthermore, the movement of the first and / or second magnetic components also ensures that the first and second magnetic components maintain a safe distance from other components on the diaphragm production equipment, avoiding interference with other components on the diaphragm production equipment, especially maintaining a distance from the diaphragm joint, thereby effectively protecting the magnetic adsorption assembly. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the assembly structure of the diaphragm demagnetizing device and the frame in one embodiment;

[0021] Figure 2 This is a schematic diagram of the diaphragm demagnetizing device at one angle in one embodiment;

[0022] Figure 3 This is a schematic diagram of the connector structure in one embodiment;

[0023] Figure 4 This is a schematic diagram of the diaphragm demagnetizing device from another angle in one embodiment;

[0024] Figure 5 This is a partial schematic diagram of a diaphragm demagnetizing device in one embodiment.

[0025] Among them: 1. Diaphragm demagnetizing device;

[0026] 11. Fixed bracket; 111. Fixing part; 1111. Mounting groove; 112. Connecting part; 1121. Arc groove; 12. Connecting piece; 121. First end; 122. Second end; 123. First surface; 124. Second surface; 13. Magnetic adsorption assembly; 131. First magnetic component; 132. Second magnetic component; 133. Gap; 14. Driving mechanism; 141. First driving component; 142. Second driving component; 15. Guide mechanism; 151. Guide groove; 1511. First guide groove; 1512. Second guide groove; 152. Slide rod; 1521. First slide rod; 1522. Second slide rod;

[0027] 2. Rack;

[0028] 3. Diaphragm;

[0029] F1, first direction; F2, second direction. Detailed Implementation

[0030] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0031] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operational steps involved in each embodiment can also be rearranged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for clearly describing a particular embodiment and do not imply that they represent the necessary components and / or order.

[0032] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0033] This application provides a membrane demagnetizing device 1, which can remove magnetic materials (such as iron filings and magnetic metal particles) from the surface of the membrane 3 (i.e., the membrane surface) by using the principle of magnetic adsorption, thereby ensuring that the prepared lithium-ion battery has good safety and a long service life.

[0034] It is understandable that the diaphragm 3 is generally a sheet structure with two opposing surfaces. The first magnetic component 131 and the second magnetic component 132 of the diaphragm demagnetizing device 1 can adsorb magnetic substances on one surface of the diaphragm 3 respectively, so as to ensure the overall cleaning effect of the diaphragm 3.

[0035] Furthermore, it is understandable that the battery manufacturing process involves multiple steps, especially the preparation of the separator 3, which includes molding, stretching, and slitting. In each production step, there is a risk of magnetic substances adsorbing onto the surface of the separator 3. These magnetic substances can not only cause short circuits in the produced batteries but may also lead to quality defects on the surface of the separator 3 during production, affecting the yield of the finished product. Installing the separator demagnetizing device 1 on the equipment corresponding to each production step of the separator 3, or at least on the equipment corresponding to the final production step of the separator 3, can ensure that the surface of the separator used in battery production is clean.

[0036] Please see Figures 1 to 5 The diaphragm demagnetizing device 1 includes two fixed supports 11, two connectors 12, a magnetic adsorption assembly 13, and a drive mechanism 14. The fixed supports 11 are mounted on the frame 2 of the lithium battery diaphragm production equipment. The connectors 12 are mounted one-to-one on the fixed supports 11. Each connector 12 has a first end 121 and a second end 122 along a first direction F1, and each connector 12 has a first surface 123 and a second surface 124 along a second direction F2. The first direction F1 and the second direction F2 are perpendicular to each other. The magnetic adsorption assembly 13 is disposed on the two connectors 12. Between them, magnetic adsorption components are used to adsorb magnetic materials on the surface of the diaphragm 3; the magnetic adsorption component 13 includes a first magnetic element 131 and a second magnetic element 132, the first magnetic element 131 is mounted on a first surface 123 located at the first end 121; the second magnetic element 132 is mounted on a second surface 124 located at the second end 122, so that a gap 133 is formed between the second magnetic element 132 and the first magnetic element 131, the gap 133 is used for the diaphragm 3 to pass through; the driving mechanism 14 is used to drive the first magnetic element 131 and / or the second magnetic element 132 to move along the second direction F2, so as to adjust the size of the gap 133.

[0037] The fixed bracket 11 serves as the supporting structure for the entire diaphragm demagnetizing device 1. It can be detachably connected to the frame 2 of the lithium battery diaphragm production equipment, thereby facilitating the adjustment of the position of the diaphragm demagnetizing device 1. Specifically, the fixed bracket 11 is provided with a strip-shaped mounting groove 1111. A fixing member passes through the mounting groove 1111 to fix the fixed bracket 11 to the frame 2. The relative position of the fixed bracket 11 and the frame 2 can be adjusted by moving the position of the fixing member within the mounting groove 1111.

[0038] Since the diaphragm 3 is a sheet structure, it has a length in its direction of travel (from one process to the next process) and a width perpendicular to its direction of travel (also called width). There are two fixed brackets 11 and two connecting members 12, so that after the first magnetic member 131 and the second magnetic member 132 cross the frame 2, their two ends are connected to the fixed bracket 11 through the connecting member 12. It can also be understood that each connecting member 12 is connected to a fixed bracket 11. The two ends of the first magnetic member 131 are connected to the first surface 123 of the first end 121 of the two connecting members 12, and the two ends of the second magnetic member 132 are connected to the second surface 124 of the second end 122 of the two connecting members 12. The lengths of the first magnetic element 131 and the second magnetic element 132 (the dimension between the two fixing brackets 11 or the two connecting members 12) are both matched with the width of the diaphragm 3, that is, the lengths of the first magnetic element 131 and the second magnetic element 132 are both greater than or equal to the width of the diaphragm 3, so that the diaphragm 3 can pass through the gap 133 between the first magnetic element 131 and the second magnetic element 132. Preferably, the lengths of the first magnetic element 131 and the second magnetic element 132 are both greater than the width of the diaphragm 3, thereby preventing the diaphragm 3 from contacting the fixing bracket 11 and damaging the diaphragm 3.

[0039] In some embodiments, the diaphragm 3 travels through the gap 133 in a direction parallel to the first direction F1.

[0040] It should be noted that the driving mechanism 14 for driving the first magnetic element 131 and / or the second magnetic element 132 to move along the second direction F2 can be understood as follows: the driving mechanism 14 can drive one of the first magnetic element 131 and the second magnetic element 132 to move along the second direction F2, or it can drive both the first magnetic element 131 and the second magnetic element 132 to move, so as to achieve flexible adjustment of the gap 133. Thus, when the first magnetic element 131 and the second magnetic element 132 are relatively close, the gap 133 between them is reduced to accommodate the thinner diaphragm 3, and when they are relatively far apart, the gap 133 between them is increased to accommodate the thicker diaphragm 3.

[0041] In this application, the thickness of the diaphragm 3 refers to the dimension in the direction perpendicular to the plane containing the width and length mentioned above.

[0042] Furthermore, during the production of diaphragm 3, diaphragm connectors are required to connect and guide diaphragm 3. The size of the diaphragm connector is generally larger than the size of diaphragm 3 itself, especially larger than the size in the thickness direction of diaphragm 3. In order to ensure the smooth passage of the diaphragm connector, the gap 133 should be designed to be relatively large, which will affect the demagnetization effect. In order to ensure the demagnetization effect, the gap 133 in the magnetic adsorption component 13 will be too small, causing the diaphragm connector to come into contact or collide with the first magnetic component 131 and the second magnetic component 132, thereby damaging the first magnetic component 131 and the second magnetic component 132. Through the design of the drive mechanism 14, the relative position between the first magnetic component 131 and the second magnetic component 132 can be adjusted, thereby adjusting the size of the gap 133. This ensures the demagnetization effect and avoids damage caused by interference between the diaphragm connector and the first magnetic component 131 and the second magnetic component 132, thereby effectively protecting the first magnetic component 131 and the second magnetic component 132 and improving their service life.

[0043] Specifically, in non-production mode, the drive mechanism 14 increases the gap 133 between the first magnetic component 131 and the second magnetic component 132 to ensure the diaphragm connector can pass smoothly through the first magnetic component 131 and the second magnetic component 132. In production mode, the drive mechanism 14 reverses its action, decreasing the gap 133 between the first magnetic component 131 and the second magnetic component 132 to ensure the demagnetization effect of the diaphragm 3 meets the requirements. The adjustment range of the gap 133 between the first magnetic component 131 and the second magnetic component 132 is determined by the stroke and limit of the drive component.

[0044] In this application, a diaphragm connector refers to a component or structure used to connect two or more sections of diaphragm 3 during the production, processing or use of diaphragm 3. Its function is to connect the separated sections of diaphragm 3 into a continuous whole to adapt to the continuous operation of the production line.

[0045] In some embodiments, the connector 12 is a plate-like structure or a block-like structure having two opposing planes.

[0046] In some embodiments, the first magnetic element 131 and the second magnetic element 132 are both constructed as magnetic planar plate structures, and the first magnetic element 131 and the second magnetic element 132 are arranged in parallel relative to each other. It can also be understood that the first magnetic element 131 and the second magnetic element 132 are both arranged in parallel with the diaphragm 3, thereby increasing the area corresponding to the magnetic field adsorption effect and improving the demagnetization effect.

[0047] Please see Figure 4In some embodiments, the driving mechanism 14 includes a first driving member 141 and a second driving member 142. The first driving member 141 is connected to a first magnetic member 131 and is used to drive the first magnetic member 131 to move along the second direction F2. The second driving member 142 is connected to the second magnetic member 132 and is used to drive the second magnetic member 132 to move along the second direction F2.

[0048] To ensure the accuracy and stability of the movement of the first magnetic component 131 and the second magnetic component 132, two of each of the first driving component 141 and the second driving component 142 are provided. The two first driving components 141 are respectively located at both ends of the first magnetic component 131, and the two first driving components 141 synchronously drive the first magnetic component 131 to move along the second direction F2. The two second driving components 142 are respectively located at both ends of the second magnetic component 132, and the two second driving components 142 synchronously drive the second magnetic component 132 to move along the second direction F2.

[0049] The first magnetic element 131 and the second magnetic element 132 both move in a linear motion along the first direction F1. The first driving element 141 and the second driving element 142 should be able to provide linear driving force to them. In some embodiments, the first driving element 141 and the second driving element 142 include a linear motion cylinder or a linear motor.

[0050] Of course, in other embodiments, the first drive member 141 and the second drive member 142 can be a combination structure that can provide linear driving force. For example, the first drive member 141 and the second drive member 142 can be a combination structure of a rotary motor and a lead screw, or a combination structure of a rotary motor, a synchronous pulley and a synchronous belt.

[0051] In some embodiments, the first drive member 141 and the second drive member 142 can be detachably installed on the connector 12, thereby allowing the first drive member 141 and the second drive member 142 with different strokes to be replaced, thus improving the applicability of the diaphragm demagnetizing device 1.

[0052] In some embodiments, the diaphragm demagnetizing device 1 further includes a guiding mechanism 15, which includes a guide groove 151 and a slide rod 152. One of the guide groove 151 and the slide rod 152 is disposed on the connector 12, and the other is disposed on the first magnetic element 131 and / or the second magnetic element 132. The slide rod 152 is slidably connected to the guide groove 151. The design of the guide groove 151 and the slide rod 152 can guide the movement of the first magnetic element 131 and the second magnetic element 132, making their movement stable and precise. Based on this, when the first magnetic element 131 and the second magnetic element 132 move individually, only one of them is provided with the guide groove 151 or the slide rod 152; when both the first magnetic element 131 and the second magnetic element 132 move, both are provided with the guide groove 151 or the slide rod 152.

[0053] In other embodiments, the guide mechanism 15 may also include a slider and a slide rail that are slidably connected, one of which is disposed on the connector 12 and the other is disposed on the first magnetic element 131 and / or the second magnetic element 132.

[0054] Please continue reading. Figure 4 In some embodiments, the guide groove 151 includes a first guide groove 1511 and a second guide groove 1512, the first guide groove 1511 and the second guide groove 1512 are respectively disposed at the first end 121 and the second end 122, and both pass through the connector 12 along the second direction F2; the slide rod 152 includes a first slide rod 1521 and a second slide rod 1522 both extending along the second direction F2, the first slide rod 1521 is connected to the first magnetic element 131, and the first slide rod 1521 is slidably disposed in the first guide groove 1511; the second slide rod 1522 is connected to the second magnetic element 132, and the second slide rod 1522 is slidably disposed in the second guide groove 1512. In these embodiments, the number of slide rods 152 and guide grooves 151 are the same, and they are arranged in a one-to-one correspondence. For example, the number of first slide rods 1521, second slide rods 1522, first guide grooves 1511 and second guide grooves 1512 can all be four. Two first slide rods 1521 are respectively provided at both ends of the first magnetic component 131, and two first guide grooves 1511 are respectively provided at the first ends 121 of the two connecting components 12. Two second slide rods 1522 are respectively provided at both ends of the second magnetic component 132, and two second guide grooves 1512 are respectively provided at the second ends 122 of the two connecting components 12. The number of slide rods 152 and guide grooves 151 being the same can be determined according to the specific design requirements of the application scenario, which will not be elaborated on here.

[0055] Of course, in other embodiments, the first slide bar 1521 and the second slide bar 1522 may be disposed on the connector 12, the first guide groove 1511 may be disposed on the first magnetic element 131, and the second guide groove 1512 may be disposed on the second magnetic element 132.

[0056] Please see Figure 5 In some embodiments, the fixed bracket 11 is provided with an arc-shaped groove 1121, and the connector 12 is detachably installed in the arc-shaped groove 1121 by fasteners (not shown). The connector 12 can move along the extension direction of the arc-shaped groove 1121 (or rotate around the arc trajectory) to adjust the installation angle of the connector 12 and the magnetic adsorption assembly 13. This enables the angle adjustment of the connector 12, thereby adjusting the posture (or angle) of the magnetic adsorption assembly 13. This allows it to adapt to diaphragms 3 with different orientations (such as diaphragms 3 that are tilted for conveying), thus enhancing the adaptability of the diaphragm demagnetizing device 1.

[0057] In some embodiments, fasteners include bolts, pins, or screws.

[0058] In some embodiments, the fixed bracket 11 includes a fixing part 111 and a connecting part 112. The fixing part 111 is used to connect with the frame 2. The fixing part 111 is provided with a strip-shaped mounting groove 1111. The connecting part 112 is a cylindrical structure and is provided with an arc-shaped groove 1121. The distance between the magnetic adsorption component 13 and the frame 2 can be adjusted by the mounting groove 1111. The posture of the magnetic adsorption component 13 can be adjusted by the arc-shaped groove 1121. The cooperative design of the mounting groove 1111 and the arc-shaped groove 1121 can further enable the diaphragm demagnetizing device 1 to meet more application scenarios.

[0059] In some embodiments, the first magnetic element 131 and the second magnetic element 132 have opposite magnetic properties to ensure that a closed magnetic field loop can be formed between them, which can enhance the magnetic field strength in the gap 133, thereby improving the adsorption effect on magnetic materials.

[0060] The embodiments of this application also provide a lithium battery separator production equipment, including the separator demagnetizing device 1 in the above embodiments. The separator demagnetizing device 1 has been described in detail above and will not be repeated here.

[0061] In some embodiments, the diaphragm production equipment is at least one of a diaphragm stretching machine, a diaphragm winding machine, and a diaphragm slitting machine.

[0062] In this application, "at least one" can be understood as one of a diaphragm stretching machine, a diaphragm winding machine, and a diaphragm slitting machine, or any two of these three machines, or all three. Incorporating a diaphragm demagnetizing device 1 in at least one of the diaphragm stretching machine, diaphragm winding machine, and diaphragm slitting machine can effectively ensure the cleanliness of the diaphragm surface, thereby improving the performance of the prepared battery.

[0063] The above examples illustrate this application only to aid understanding and are not intended to limit its scope. Those skilled in the art to which this application pertains can make various simple deductions, modifications, or substitutions based on the ideas presented.

Claims

1. A diaphragm demagnetizing device, characterized in that, include: Two fixed brackets are mounted on the frame of the lithium battery separator production equipment. Two connectors are mounted on the fixed bracket in a one-to-one correspondence; each connector has a first end and a second end opposite to each other along a first direction, and each connector has a first surface and a second surface opposite to each other along a second direction, wherein the first direction and the second direction are perpendicular to each other; A magnetic adsorption assembly, disposed between two connecting members, is used to adsorb magnetic material on the surface of a diaphragm; the magnetic adsorption assembly includes a first magnetic element and a second magnetic element, the first magnetic element being mounted on the first surface at the first end; the second magnetic element being mounted on the second surface at the second end, such that a gap is formed between the second magnetic element and the first magnetic element, the gap allowing the diaphragm to pass through; and A driving mechanism is provided for driving the first magnetic element and / or the second magnetic element to move along the second direction to adjust the size of the gap.

2. The diaphragm demagnetizing device according to claim 1, characterized in that, Both the first magnetic component and the second magnetic component are constructed as magnetic planar plates, and the first magnetic component and the second magnetic component are arranged in parallel relative to each other.

3. The diaphragm demagnetizing device according to claim 1, characterized in that, The driving mechanism includes a first driving member and a second driving member. The first driving member is connected to the first magnetic member and is used to drive the first magnetic member to move along the second direction. The second driving member is connected to the second magnetic member and is used to drive the second magnetic member to move along the second direction.

4. The diaphragm demagnetizing device according to claim 3, characterized in that, The first driving component and the second driving component include a linear motion cylinder or a linear motor.

5. The diaphragm demagnetizing device according to claim 1, characterized in that, The diaphragm demagnetizing device further includes a guiding mechanism, which includes a guide groove and a slide rod. One of the guide groove and the slide rod is disposed on the connector, and the other is disposed on the first magnetic component and / or the second magnetic component. The slide rod is slidably connected to the guide groove.

6. The diaphragm demagnetizing device according to claim 5, characterized in that, The guide groove includes a first guide groove and a second guide groove, which are respectively disposed at the first end and the second end, and both pass through the connector along the second direction; the slide rod includes a first slide rod and a second slide rod that both extend along the second direction, the first slide rod is connected to the first magnetic component and is slidably disposed in the first guide groove; the second slide rod is connected to the second magnetic component and is slidably disposed in the second guide groove.

7. The diaphragm demagnetizing device according to claim 1, characterized in that, The fixed bracket is provided with an arc-shaped groove, and the connector is detachably installed in the arc-shaped groove by fasteners. The connector can move along the extension direction of the arc-shaped groove to adjust the installation angle of the connector and the magnetic adsorption assembly.

8. The diaphragm demagnetizing device according to claim 1, characterized in that, The first magnetic element and the second magnetic element have opposite magnetic properties.

9. A lithium battery separator production equipment, characterized in that, The device includes a diaphragm demagnetizing apparatus as described in any one of claims 1-8.

10. The lithium battery separator production equipment as described in claim 9, characterized in that, The diaphragm production equipment is at least one of a diaphragm stretching machine, a diaphragm winding machine, and a diaphragm slitting machine.

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