Battery diaphragm unfolding mechanism

Abstract

The utility model relates to a battery diaphragm unfolding mechanism, and belongs to the technical field of battery diaphragms. The unfolding mechanism comprises a lower fixing seat, an upper fixing seat and a flattening assembly used for flattening a diaphragm, the first side wall of the upper fixing seat is rotationally connected with the lower fixing seat, and the second side wall of the upper fixing seat is detachably connected with the lower fixing seat. Semi-cylindrical grooves are formed in the opposite ends of the lower fixing base and the upper fixing base, and texture bodies are arranged on the surfaces of the semi-cylindrical grooves. According to the scheme provided by the utility model, the position of the unfolding mechanism can be quickly adjusted by disassembling the upper fixing seat and the lower fixing seat, the friction force to the supporting shaft is increased by the texture body, and the flattening stability and firmness are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery diaphragms, in particular to a battery diaphragm unfolding mechanism. Background Art

[0002] In the production process of batteries, after the battery separator is hot-melt extruded, it is generally necessary to wind the battery separator into a roll for easy collection, so as to facilitate large-scale storage or transportation. The traditional winding device generally uses a hollow round tube to be sleeved on the output shaft of the motor, and then fixes the battery separator to the outer wall of the hollow round tube, and then drives the hollow round tube to rotate by the motor to achieve the winding of the battery separator. However, during the winding process, due to structural defects, the edge of the battery separator often has a lateral offset, which causes the battery separator to have wrinkles, affecting the winding quality.

[0003] In the prior art, the unfolding mechanism is sleeved behind the supporting shaft of the unwinding mechanism, which is prone to sliding and displacement, thus affecting the flattening effect of the diaphragm. Utility Model Content

[0004] In order to overcome the problems existing in the related technology, the utility model provides a battery diaphragm unfolding mechanism, which can quickly adjust the position of the battery diaphragm unfolding mechanism by disassembling the upper fixing seat and the lower fixing seat, and the texture body increases the friction force on the support shaft to improve the stability and firmness of the flattening.

[0005] The first aspect of the utility model provides a battery diaphragm unfolding mechanism, comprising a lower fixed seat, an upper fixed seat and a flattening assembly for flattening the diaphragm, the first side wall of the upper fixed seat is rotatably connected to the lower fixed seat, the second side wall of the upper fixed seat is detachably connected to the lower fixed seat, and the lower fixed seat and the upper fixed seat have opposite ends provided with semi-cylindrical grooves, and the surface of the semi-cylindrical groove is provided with a texture body.

[0006] In some embodiments, the flattening assembly includes a connecting seat, a movable wheel, a fixed wheel, an extension arm and a swing arm, the connecting seat is connected to the lower fixed seat, the fixed wheel is fixed on the connecting seat, one end of the swing arm is hinged to the connecting seat through a rotating shaft, the two ends of the extension arm are respectively connected to the fixed wheel and the swing arm, and the movable wheel is arranged parallel to the fixed wheel.

[0007] In some embodiments, the flattening assembly further includes a driving mechanism, a fixed end of the driving mechanism is disposed on the connecting seat, a movable end of the driving mechanism is connected to the swing arm, and the driving mechanism drives the swing arm to rotate around the rotating shaft.

[0008] In some embodiments, the connecting seat includes a mounting plate and a mounting seat, the mounting plate is fixedly connected to the lower fixing seat, the mounting seat is mounted on the mounting plate, a first end of the mounting seat is hinged to the swing arm, and a second end of the mounting seat is connected to the fixing wheel;

[0009] The driving mechanism comprises a cylinder, which is mounted on the mounting seat, and a piston rod of the cylinder is hinged to the swing arm.

[0010] In some embodiments, the first side wall of the lower fixing seat is hinged to the upper fixing seat, and the second side wall of the lower fixing seat is connected to the upper fixing seat by bolts.

[0011] In some embodiments, the upper fixing seat, the lower fixing seat and the connecting seat are all made of nylon material, and the lower fixing seat and the connecting seat are an integrally formed structure.

[0012] In some embodiments, the texture includes protrusions extending toward the axis direction of the semi-cylindrical groove, and the protrusions are arranged at intervals along the length direction and the circumferential direction of the semi-cylindrical groove.

[0013] In some embodiments, the protrusion has a depth of 200 μm to 1000 μm.

[0014] The technical solution provided by the utility model may have the following beneficial effects:

[0015] The battery diaphragm unfolding mechanism provided by the utility model, when in use, after the upper fixing seat and the lower fixing seat are disassembled, the upper fixing seat and the lower fixing seat are mounted on the support shaft of the lithium battery unwinding device, and the texture body provides friction to ensure that the unfolding device does not loosen or become dislocated during the operation of the equipment, and when the battery diaphragm unfolding mechanism needs to be adjusted, the upper fixing seat and the lower fixing seat can be quickly loosened to improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0017] Figure 1 It is a structural schematic diagram of a battery diaphragm unfolding mechanism shown in an embodiment of the utility model;

[0018] Figure 2 It is another structural schematic diagram of the battery diaphragm unfolding mechanism shown in an embodiment of the utility model;

[0019] Figure 3It is a schematic structural diagram of a lower fixing seat shown in an embodiment of the utility model.

[0020] Reference numerals:

[0021] 1. Lower fixed seat; 2. Upper fixed seat; 3. Semi-cylindrical groove; 31. Protrusion; 4. Flattening assembly; 41. Connecting seat; 410. Mounting plate; 411. Mounting seat; 42. Movable wheel; 43. Fixed wheel; 44. Swing arm; 45. Driving mechanism; 46. Extension arm; 5. Support shaft. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0023] In the actual production process of dry-process diaphragms, after the diaphragm raw materials are hot-melt extruded and formed, the diaphragm is wound through multiple unwinding devices connected in series for easy storage and transportation. However, the width of the battery diaphragm can reach 3 meters, which causes the lateral tension in the middle part of the battery diaphragm to be inconsistent with the tension on both sides of the diaphragm during the winding process, which is prone to wrinkles. The existing unfolding mechanism has poor firmness and is prone to loosening during operation, resulting in displacement, aggravating the change in the lateral tension of the diaphragm and losing the flattening effect. In the prior art, the flattening component 4 generally requires a relatively high weight to clamp the diaphragm. Excessive dead weight can easily cause it to flip over when it becomes loose, causing the flattening component 4 to press on the diaphragm, thereby losing the flattening effect.

[0024] The technical solution of the embodiment of the utility model is described in detail below with reference to the accompanying drawings.

[0025] See also Figures 1 to 3 An embodiment of the utility model provides a battery diaphragm unfolding mechanism, including a lower fixing seat 1, an upper fixing seat 2 and a flattening assembly 4 for flattening the diaphragm, the first side wall of the upper fixing seat 2 is rotatably connected to the lower fixing seat 1, the second side wall of the upper fixing seat 2 is detachably connected to the lower fixing seat 1, and the lower fixing seat 1 and the upper fixing seat 2 are both provided with a semi-cylindrical groove 3 at opposite ends, and the surface of the semi-cylindrical groove 3 is provided with a texture body.

[0026] When the operator adjusts the position of the battery diaphragm unfolding mechanism according to the width of the diaphragm, the operator adjusts the tightness of the upper and lower fixed seats 2 and 1 by disassembling the lower fixing seat 1 and the upper fixing seat 2, and quickly toggles the position of the unfolding device to quickly complete the adjustment of the battery diaphragm unfolding mechanism. In use, the upper and lower fixing seats 2 and 1 are mounted on the support shaft 5 of the unwinding device through the semi-cylindrical grooves 3 of the upper and lower fixing seats 2 and 1, and the unfolding plane of the flattening assembly 4 is aligned with the advancing direction of the diaphragm, and the upper and lower fixing seats 2 and 1 are fixed. When the width of the diaphragm changes, the operator adjusts the tightness of the upper and lower fixing seats 2 and 1 by disassembling the lower and upper fixing seats 1 and quickly toggles the position of the unfolding device to adjust the position of the flattening assembly 4. In addition, the texture in the semi-cylindrical groove 3 can increase the friction between the upper and lower fixing seats 2 and 1 and the support shaft 5, so as to avoid improper operation and cause the flattening assembly 4 to deflect due to its own gravity.

[0027] In another embodiment of a battery diaphragm unfolding mechanism provided by an embodiment of the utility model, the flattening component 4 of the above-mentioned battery diaphragm unfolding mechanism includes a connecting seat 41, a movable wheel 42, a fixed wheel 43, an extension arm 46 and a swing arm 44, the connecting seat 41 is connected to the lower fixed seat 1, the fixed wheel 43 is fixed on the connecting seat 41, one end of the swing arm 44 is hinged to the connecting seat 41 through a rotating shaft, the two ends of the extension arm 46 are respectively connected to the fixed wheel 43 and the swing arm 44, and the movable wheel 42 is arranged parallel to the fixed wheel 43.

[0028] In another embodiment of a battery diaphragm unfolding mechanism provided by an embodiment of the utility model, the flattening component 4 of the above-mentioned battery diaphragm unfolding mechanism also includes a driving mechanism 45, the fixed end of the driving mechanism 45 is arranged on the connecting seat 41, the movable end of the driving mechanism 45 is connected to the swing arm 44, and the driving mechanism 45 drives the swing arm 44 to rotate around the rotating shaft.

[0029] In another embodiment of a battery diaphragm unfolding mechanism provided by an embodiment of the utility model, the connecting seat 41 of the battery diaphragm unfolding mechanism includes a mounting plate 410 and a mounting seat 411, the mounting plate 410 is fixedly connected to the lower fixing seat 1, the mounting seat 411 is installed on the mounting plate 410, the first end of the mounting seat 411 is hinged to the swing arm 44, and the second end of the mounting seat 411 is connected to the fixing wheel 43;

[0030] The driving mechanism 45 includes a cylinder, which is mounted on the mounting seat 411, and the piston rod of the cylinder is hinged to the swing arm 44. The piston end of the cylinder is connected to the swing arm 44, and when the piston end is reciprocating, the swing arm 44 can be driven to rotate around the hinge axis, thereby driving the movable wheel 42 to rotate, separating the movable wheel 42 and the fixed wheel 43, making it easier to insert the diaphragm into the gap between the movable wheel 42 and the fixed wheel 43, and ensuring stability during the membrane insertion process.

[0031] In this embodiment, the connecting plate and the mounting seat 411 can be made of metal and engineering plastics. In a preferred embodiment, they are made of engineering plastics, and more preferably, nylon. The mounting plate 410 and the mounting seat 411 made of plastics make the deployment device have a lower weight as a whole.

[0032] In another embodiment of a battery diaphragm unfolding mechanism provided by the utility model, the first side wall of the lower fixing seat 1 of the above-mentioned battery diaphragm unfolding mechanism is hinged to the upper fixing seat 2, and the second side wall of the lower fixing seat 1 is connected to the upper fixing seat 2 by bolts.

[0033] In another embodiment of a battery diaphragm unfolding mechanism provided by the utility model, the upper fixing seat 2, the lower fixing seat 1 and the connecting seat 41 of the above-mentioned battery diaphragm unfolding mechanism are all made of nylon material, and the lower fixing seat 1 and the connecting seat 41 are an integrally formed structure.

[0034] In another feasible solution, the upper fixing seat 2 and the lower fixing seat 1 can also be made of metal materials. When the upper fixing seat 2 and the lower fixing seat 1 are made of metal materials, such as cold-rolled steel plates, after the semi-cylindrical groove 3 is processed by forging, a texture can be constructed on the surface of the semi-cylindrical groove 3 by laser processing. The laser processing method is a method of using a pulsed laser with high energy density to texture a periodic structure on the surface of a material. The pulsed laser has extremely high peak power and extremely short pulse width. After contacting the material, the surface of the material will heat up rapidly, and physical or chemical changes will occur in the contact area, making it easy to process various solid surfaces.

[0035] The upper fixing seat 2 and the lower fixing seat 1 in the utility model are made of nylon material. Nylon material has the characteristics of high hardness and light weight, which can reduce a part of its own weight and improve the overall stability of the battery diaphragm expansion mechanism. In this embodiment, the connecting seat 41 can be made of the same nylon material as the lower fixing seat 1. This structure is suitable for high-intensity assembly work and can be directly injection-molded through a mold on an injection molding machine using recycled materials to improve the connection firmness between the lower fixing seat 1 and the connecting seat 41. This one-piece structure is produced in a fully automatic manner, which can realize the recycling of recycled plastics.

[0036] In another embodiment of a battery diaphragm unfolding mechanism provided by an embodiment of the utility model, the texture body of the above-mentioned battery diaphragm unfolding mechanism includes protrusions 31 extending toward the axial direction of the semi-cylindrical groove 3, and the protrusions 31 are arranged at intervals along the length direction and circumferential direction of the semi-cylindrical groove 3.

[0037] In another embodiment of a battery diaphragm unfolding mechanism provided by the utility model, the depth of the protrusion 31 of the battery diaphragm unfolding mechanism is 200 μm to 1000 μm, which is beneficial to enhance the bonding strength of the adjacent parts of the protrusion 31, and has a higher gripping force when it contacts and abuts against the support shaft 5.

[0038] Compared with the prior art, both ends of the support shaft 5 in the unwinding device are provided with the battery diaphragm unfolding mechanism of the utility model. During the transmission of the diaphragm from the rollers of the unwinding device, the flattening component 4 (that is, the fixed wheel 43 and the movable wheel 42 clamp the diaphragm together) applies a certain tensioning force to the diaphragm, thereby adjusting the tension of the diaphragm in the lateral direction, straightening the diaphragm at the edges of both sides of the support shaft 5 to prevent the diaphragm from sagging, thereby ensuring that the diaphragm does not generate wrinkles during the winding process, and effectively improving the quality level of the diaphragm.

[0039] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A battery diaphragm unfolding mechanism, characterized in that: It includes a lower fixed seat, an upper fixed seat and a flattening component for flattening the diaphragm, the first side wall of the upper fixed seat is rotatably connected to the lower fixed seat, the second side wall of the upper fixed seat is detachably connected to the lower fixed seat, and the lower fixed seat and the upper fixed seat have opposite ends each provided with a semi-cylindrical groove, and the surface of the semi-cylindrical groove is provided with a texture body.

2. A battery diaphragm unfolding mechanism according to claim 1, characterized in that: The flattening assembly includes a connecting seat, a movable wheel, a fixed wheel, an extension arm and a swing arm. The connecting seat is connected to the lower fixed seat, the fixed wheel is fixed on the connecting seat, one end of the swing arm is hinged to the connecting seat through a rotating shaft, the two ends of the extension arm are respectively connected to the fixed wheel and the swing arm, and the movable wheel is arranged parallel to the fixed wheel.

3. A battery diaphragm unfolding mechanism according to claim 2, characterized in that: The flattening assembly further comprises a driving mechanism, a fixed end of the driving mechanism is arranged on the connecting seat, a movable end of the driving mechanism is connected to the swing arm, and the driving mechanism drives the swing arm to rotate around the rotating shaft.

4. A battery separator deployment mechanism according to claim 3, characterized in that: The connecting seat comprises a mounting plate and a mounting seat, wherein the mounting plate is fixedly connected to the lower fixing seat, the mounting seat is mounted on the mounting plate, the first end of the mounting seat is hinged to the swing arm, and the second end of the mounting seat is connected to the fixing wheel; The driving mechanism comprises a cylinder, which is mounted on the mounting seat, and a piston rod of the cylinder is hinged to the swing arm.

5. A battery separator unfolding mechanism according to claim 4, characterized in that: The first side wall of the lower fixing seat is hinged to the upper fixing seat, and the second side wall of the lower fixing seat is connected to the upper fixing seat by bolts.

6. A battery separator unfolding mechanism according to claim 5, characterized in that: The upper fixing seat, the lower fixing seat and the connecting seat are all made of nylon material, and the lower fixing seat and the connecting seat are an integrally formed structure.

7. A battery separator deployment mechanism according to claim 1, characterized in that: The texture includes protrusions extending toward the axis direction of the semi-cylindrical groove, and the protrusions are arranged at intervals along the length direction and the circumferential direction of the semi-cylindrical groove.

8. A battery diaphragm unfolding mechanism according to claim 7, characterized in that: The depth of the protrusion is 200 μm to 1000 μm.

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