CN115331963A - Electrode foil processing device, electrode foil processing technology and electrode foil - Google Patents
Electrode foil processing device, electrode foil processing technology and electrode foil Download PDFInfo
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- CN115331963A CN115331963A CN202210921794.XA CN202210921794A CN115331963A CN 115331963 A CN115331963 A CN 115331963A CN 202210921794 A CN202210921794 A CN 202210921794A CN 115331963 A CN115331963 A CN 115331963A
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- 239000011888 foil Substances 0.000 title claims abstract description 278
- 238000012545 processing Methods 0.000 title claims abstract description 52
- 238000005516 engineering process Methods 0.000 title claims abstract description 9
- 238000003754 machining Methods 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 28
- 238000005096 rolling process Methods 0.000 abstract description 23
- 238000000034 method Methods 0.000 abstract description 12
- 230000003993 interaction Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 17
- 230000008569 process Effects 0.000 description 8
- 238000007796 conventional method Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/048—Electrodes or formation of dielectric layers thereon characterised by their structure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H27/00—Special constructions, e.g. surface features, of feed or guide rollers for webs
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention relates to an electrode foil processing device, an electrode foil processing technology and an electrode foil, comprising: the conveying trough is used for the electrode foil to move, a plurality of rollers capable of rotating around the axis of the rollers are arranged in the conveying trough, and the rollers are obliquely arranged in the conveying trough; the circumferential surface of the roller is provided with a plurality of balls which can rotate around the center of the roller, and the balls are abutted with the electrode foil. The method ensures that the foil surface of the electrode foil and the balls which can rotate around the sphere center in multiple directions roll relatively and are subjected to the interaction of rolling tension, so that multi-directional cracks are formed on the foil surface of the electrode foil, and the multi-directional bending resistance of the electrode foil processed by the method is improved; the surface of the rolling roller capable of rotating automatically is provided with a plurality of rolling balls capable of rotating automatically, so that the contact points of the rolling balls and the foil surface of the electrode foil are changed continuously along with the rotation of the rolling roller, and the contact points of the rolling balls and the foil surface of the electrode foil are changed in a non-linear mode, further more multi-directional cracks are generated on the foil surface of the electrode foil, and the multi-directional bending resistance of the electrode foil is improved.
Description
Technical Field
The present invention relates to the field of electrode foil technology, and more particularly, to an electrode foil processing apparatus, an electrode foil processing process, and an electrode foil.
Background
The high-voltage anode electrode foil is widely applied to an electrolytic capacitor of an electronic component, and along with the development of electronic products towards volume miniaturization and integration, miniaturization is also an inevitable trend of the development of the aluminum electrolytic capacitor, namely, the volume is reduced as much as possible on the premise of ensuring various electrical properties, and the bending resistance is widely researched as an important index for measuring the mechanical properties of the electrode foil product.
As shown in fig. 1, fig. 1 shows a conventional electrode foil 30' processing device, which includes a conveying tank 10' having a space for passing a strip-shaped electrode foil 30' through, a plurality of rollers 20' capable of rotating freely are arranged in the conveying tank 10', the diameter of the rollers 20' is 10mm, the axial direction of the rollers 20' is perpendicular to the foil passing direction of the electrode foil 30', and the rollers 20' are arranged in the conveying tank 10' along the foil passing direction of the electrode foil 30' in a vertically staggered manner. Referring to fig. 2, fig. 2 is a cross-sectional view of a conventional electrode foil 30' processing device along a foil feeding direction of an electrode foil 30', three adjacent rollers 20' are arranged in parallel in a V-shape, and the bottom of a conveying trough 10' is supported by a supporting column 11 '. The known method for improving the bending resistance of the electrode foil 30' is to pass the electrode foil 30' through the conveying groove 10' in a foil-feeding manner after drying or boiling the electrode foil 30', pass the electrode foil 30' through one side circumferential side wall of the roller 20' far away from the adjacent roller 20', pass the electrode foil 30' through the adjacent three rollers 20' to be in a V shape, receive and release tension to the electrode foil 30' is 70N, and under the tension and the action force of the rollers 20' arranged in the V shape, the electrode foil 30' avoids the occurrence of fine cracks (as shown in fig. 3) perpendicular to the wire-feeding direction, and the cracks can enable the electrode foil 30' to have better bending resistance when deformed in a direction perpendicular to the crack direction.
However, the deformation faced in the subsequent sintering and forming processes of the electrode foil is multidirectional, and the deformation faced by the electrode foil after the sintering and forming processes during machining is multidirectional, so that the electrode foil with bending resistance in only one direction is difficult to meet the process requirements and the machining requirements.
Disclosure of Invention
In view of the above, it is necessary to provide an electrode foil processing apparatus, an electrode foil processing process, and an electrode foil, which are directed to the problem that an electrode foil processed in the conventional method has a bending resistance in only one direction.
An electrode foil processing apparatus, comprising:
the conveying trough is used for conveying the electrode foil, a plurality of rollers capable of rotating around the axis of the rollers are arranged in the conveying trough, and the rollers are obliquely arranged in the conveying trough;
the circumferential surface of the roller is provided with a plurality of balls capable of rotating around the spherical center of the roller, and the balls are abutted to the electrode foil.
Furthermore, the roller rollers are sequentially arranged in the conveying groove in a vertically staggered mode along the foil feeding direction of the electrode foil.
Further, the axes of the rollers on the same side are in the same horizontal plane.
Further, the inclination angles of the rollers are the same.
Furthermore, the roller rollers in the conveying groove are sequentially grouped in pairs along the foil feeding direction of the electrode foil, and the inclination directions of the roller rollers in the same group are the same.
Further, the inclination directions of the rollers in the adjacent two groups are opposite.
Furthermore, a plurality of ball grooves matched with the balls are formed in the surface of the roller, and the balls are arranged in the ball grooves;
the groove depth of the ball groove is larger than the radius of the ball, the opening diameter of the ball groove is smaller than the diameter of the ball, and the ball at least partially protrudes out of the circumferential side wall of the roller.
Further, the diameter of the roller is 8mm-12mm.
Furthermore, the size of an inclined included angle between the axial extension direction of the roller and the foil feeding direction of the electrode foil ranges from 45 degrees to 80 degrees.
An electrode foil processing technology is characterized in that an electrode foil is wound along a first direction in a traction mode, and the electrode foil is bent and deflected around a first axial direction on a path where the electrode foil is wound, wherein the first axial direction is obliquely arranged with the first direction, meanwhile, the electrode foil is abutted against a plurality of spaced positions in the first axial direction along a first radial direction, and the electrode foil is deformed away from the first axial direction; the single abutting points intermittently slide relatively on the surface of the electrode foil.
Further, the magnitude of the angle of inclination between the first direction and the first axis is in the range of 45-80 °.
The electrode foil is characterized in that the front foil surface and the back foil surface of the electrode foil are provided with a plurality of cracks extending in multiple directions.
The electrode foil processing device enables the electrode foil surface and the balls which can rotate around the sphere center in multiple directions to roll relatively and be subjected to the interaction of rolling tension, so that multi-directional cracks are formed on the electrode foil surface, and the multi-directional bending resistance of the electrode foil processed by the electrode foil processing device is improved; the rolling roller surface capable of rotating around the axis of the rolling roller is provided with a plurality of balls capable of rotating around the spherical center of the rolling roller, so that the contact points of the balls and the foil surface of the electrode foil are continuously changed along with the rotation of the rolling roller, and the contact points of the balls and the foil surface of the electrode foil are changed in a non-linear manner, further more multidirectional cracks are generated on the foil surface of the electrode foil, and the multidirectional bending resistance of the electrode foil processed by the electrode foil processing device is further improved; in the process of oblique foil feeding, the electrode foil and the balls on the roller roll slide relatively to eliminate oblique acting force, so that the electrode foil cannot deviate on the roller roll.
The electrode foil processing technology can enable the surface of the electrode foil to generate a plurality of multi-directional cracks, so that the electrode foil processed by the electrode foil processing technology has multi-directional bending resistance.
The front surface and the back surface of the electrode foil are provided with a plurality of cracks extending in multiple directions, so that the electrode foil has the capability of resisting bending in multiple directions.
Drawings
Fig. 1 is a plan view of an electrode foil processing apparatus in a conventional manner;
FIG. 2 is a cross-sectional view of an electrode foil processing apparatus in a conventional manner taken along a direction of feeding an electrode foil;
FIG. 3 is a view showing the effect of cracks observed under a microscope on an electrode foil sample piece cut out after being processed by an electrode foil processing apparatus in a conventional manner;
fig. 4 is a plan view of an electrode foil processing apparatus according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a roll in the electrode foil processing apparatus according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view of an electrode foil processing apparatus according to an embodiment of the present invention, taken along a direction of feeding an electrode foil;
fig. 7 is a view showing the effect of cracks observed when a sample piece of electrode foil taken after being processed by the electrode foil processing apparatus according to embodiment 1 of the present invention is placed under a microscope;
fig. 8 is a view showing the effect of cracks observed when a sample piece of electrode foil taken out after being processed by the electrode foil processing apparatus according to embodiment 2 of the present invention is placed under a microscope;
in the figure: 10' -a conveying trough; 11' -support column; 20' -a roller; 30' -electrode foil; 10-a conveying trough; 11-a support column; 20-rolling roller; 201-a ball; 30-electrode foil.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Referring to fig. 4, fig. 4 is a plan view illustrating an electrode foil processing apparatus according to an embodiment of the present invention, which includes a conveying trough 10 having a receiving space for a strip-shaped electrode foil 30 to pass through, wherein the conveying trough 10 has a rectangular parallelepiped structure as a whole. The transfer groove 10 has open surfaces at both ends for the electrode foil 30 to enter and exit, and the electrode foil 30 enters the transfer groove 10 from the open surface at one end of the transfer groove 10 and then exits from the open surface at the other end of the transfer groove 10. The foil running direction in which the electrode foil 30 enters from one end of the transport chute 10 and leaves from the other end is the Y direction, and the width direction when the electrode foil 30 enters or leaves the transport chute 10, that is, the direction perpendicular to the Y direction is the X direction. The trough 10 also has an upwardly facing open face to facilitate observation of work within the trough 10 by workers and to facilitate later repair or maintenance of the equipment within the trough 10. A plurality of rollers 20 which can rotate around the axes of the rollers are arranged in the conveying groove 10, and two ends of each roller 20 are rotatably connected to the two side groove walls of the conveying groove 10. Specifically, the diameter of the roller 20 ranges from 8 to 12mm, and the diameter of the roller 20 is preferably 10mm. As shown in fig. 5, the surface of the roller 20 is embedded with a plurality of balls 201 capable of rotating around its own spherical center, and the balls 201 at least partially protrude from the circumferential side wall of the roller 20, so that when the electrode foil 30 passes through the surface of the roller 20, the original contact between the roller 20 and the electrode foil 30 is changed into the contact between the balls 201 and the electrode foil 30. The foil surface of the electrode foil 30 and the rolling balls 201 which can rotate around the sphere center in multiple directions roll relatively and are interacted by the rolling tension, and then, multi-directional cracks are formed on the foil surface of the electrode foil 30. Specifically, the winding and unwinding tension applied to the electrode foil 30 is 70N. The surface of the roller 20 which can rotate around the axis thereof is provided with a plurality of balls 201 which can rotate around the spherical center thereof, so that the contact points of the balls 201 and the foil surface of the electrode foil 30 are constantly changed along with the rotation of the roller 20, the contact points of the balls 201 and the foil surface of the electrode foil 30 are changed in a non-linear way, further more multi-directional cracks are generated on the foil surface of the electrode foil 30, and the multi-directional bending resistance of the electrode foil 30 processed by the electrode foil processing device is further improved. Specifically, the diameter of the ball 201 ranges between 2-4mm, and the diameter of the ball 201 is preferably 3mm. Specifically, the roller 20 is provided with at least 4 balls 201 in the same circumferential direction. Specifically, the surface of the roller 20 is provided with a ball groove with an inner diameter matched with the ball 201, the deepest groove depth of the ball groove is larger than the radius of the ball 201, the opening diameter of the ball groove is slightly smaller than the diameter of the ball 201, and the ball 201 can be rotatably arranged in the ball groove around the self spherical center. Optionally, the ball 201 is installed in the ball groove by means of thermal expansion, the roller 20 is heated to a certain temperature to expand the opening diameter of the ball groove to a length greater than the diameter of the ball 201 due to the thermal expansion effect of the material, the ball 201 is installed in the ball groove through the expanded opening by thermal expansion, and the diameter of the opening is restored to a length smaller than the diameter of the ball 201 after the roller 20 is restored to normal temperature, so that the ball 201 can be engaged in the ball groove in a self-rotating manner around the center of the ball. Optionally, the ball 201 is installed in the ball groove by a cold shrink installation method, the ball 201 is frozen to a certain temperature, so that the diameter of the ball 201 is shrunk to a length smaller than the diameter of the opening of the ball groove by the effect of material cold shrink, the ball 201 after cold shrink is installed in the ball groove through the opening, and the diameter of the rolling ball is restored to a length larger than the diameter of the opening of the ball groove after the ball 201 is restored to normal temperature, so that the ball 201 can be self-rotated around the center of the ball to be embedded in the ball groove. Further, the roller 20 and the balls 201 are made of stainless steel.
Referring to fig. 6, fig. 6 is a cross-sectional view of an electrode foil processing apparatus according to an embodiment of the present invention, taken along a foil feeding direction of an electrode foil 30, supported by a support column 11 below a conveying trough 10. The rollers 20 are sequentially arranged in the conveying groove 10 in an up-and-down staggered manner along the foil feeding direction (Y direction) of the electrode foil 30, the electrode foil 30 is in contact with the balls 201 on one side of the roller 20 far away from the adjacent roller 20, and the foil surface of the electrode foil 30 in contact with the balls 201 on the roller 20 is opposite to the foil surface of the electrode foil 30 in contact with the balls 201 on the adjacent roller 20, so that when the electrode foil 30 passes through the rollers 20 in the up-and-down staggered manner, the foil surfaces on both sides are bent and are in contact with the balls 201 on the roller 20, and cracks can be generated on the foil surfaces on both sides of the electrode foil 30. The upper and lower rollers 20 are all disposed in the same horizontal plane, that is, the upper rollers 20 are all disposed in the same horizontal plane, and the horizontal plane is higher than the horizontal plane in which the lower rollers 20 are disposed. The rolling rollers 20 on the upper side and the lower side are arranged in the same horizontal plane, so that the foil surface of the electrode foil 30 can form regular multi-directional cracks, and compared with a disordered multi-directional crack effect, the regular multi-directional cracks have better multi-directional bending resistance. The roller 20 is obliquely arranged in the conveying groove 10, the obliquely arranged roller 20 causes the balls 201 on the surface of the roller 20 to generate oblique relative sliding on the foil surface of the electrode foil 30, and further generates oblique cracks on the foil surface of the electrode foil 30 under the action of winding tension, and in the oblique foil feeding process, the electrode foil 30 and the balls 201 on the roller 20 generate relative sliding, so that oblique acting force is eliminated, and the electrode foil 30 cannot be deviated on the roller 20. Both ends of the roller 20 are on the same horizontal plane, and the axial extension direction of the roller 20 is inclined to the X direction. The inclined included angles between the axis extending directions of all the rollers 20 and the X direction are the same, and the rollers 20 with the same inclined angles between the axes extending directions and the X direction can enable the metal foil surface to form regular multi-directional cracks, and compared with the disorderly multi-directional crack effect, the regular multi-directional cracks have better multi-directional bending resistance. Alternatively, the inclination direction between the axis extending direction of each roller 20 and the X direction is set according to actual requirements, and the inclination directions between the axis extending directions of the adjacent rollers 20 and the X direction are the same or opposite. Alternatively, in the present embodiment, the inclined angles between the axial extension directions of all the rollers 20 and the X direction are the same, and a plurality of rollers 20 having a plurality of inclined angles may be provided according to actual circumstances. Optionally, in this embodiment, both ends of the same roller 20 are on the same horizontal plane, and the axis of the roller 20 extends on the same horizontal plane, or the center points of both ends of the roller 20 may be set on different levels according to actual requirements. Specifically, the size of the inclined angle between the axial extension direction of the roller 20 and the X direction is in the range of 10 ° to 45 °, that is, the size of the inclined angle between the axial extension direction of the roller 20 and the foil feeding direction (Y direction) of the electrode foil 30 is in the range of 45 ° to 80 °. Further, in this embodiment, the rollers 20 in the conveying trough 10 are sequentially paired in pairs in the foil feeding direction (Y direction) of the electrode foil 30, the extending direction of the axes of the pair of rollers 20 in the same group is the same as the inclination direction between the X directions, and the extending direction of the axes of the rollers 20 in two adjacent groups is opposite to the inclination direction between the X directions. The rollers 20 in adjacent sets are arranged in opposite oblique directions so that the passing electrode foils 30 in the trough 10 are generally straight-line foil-feeding, but the electrode foils 30 in adjacent sets are curved-line foil-feeding. The rolling rollers 20 in the same group have the same inclination direction, and the rolling rollers 20 in the group are arranged in parallel to flatten the foil surface of the electrode foil 30 passing through the rolling rollers 20 with opposite inclination directions, so as to avoid the foil surface of the electrode foil 30 passing through the rolling rollers 20 with opposite inclination directions for multiple times from generating wrinkles; when the electrode foil 30 passes through the group inner rollers 20, the conveying direction of the electrode foil 30 is perpendicular to the axis of the group inner rollers 20, the return alignment of the direction of the electrode foil 30 among the group inner rollers 20 controls the metal fatigue of the electrode foil 30 within a controllable range, and simultaneously enables the foil surface of the electrode foil 30 to generate more cracks, so that the foil surface of the electrode foil 30 is prevented from being torn due to the metal fatigue generated after the foil surface of the electrode foil 30 is bent for multiple times and in the continuous conveying direction of the electrode foil 30. Too many adjacent rollers 20 that the equidirectional slope set up can lead to roller 20 surface to be difficult to pass through wide electrode foil 30, and adjacent two sets of roller 20 inclined direction sets up the utilization ratio that has greatly utilized ball 201 on roller 20 surface in the electrode foil processingequipment of this application in opposite direction to make the electrode foil processingequipment of this application can pass through electrode foil 30 that has wide width.
Specifically, the electrode foil processing technology comprises the following steps: the electrode foil 30 is drawn and wound in the Y direction in the conveying groove 10, the electrode foil 30 is sequentially wound on the periphery of each obliquely arranged roller 20, the axis of the roller 20 is oblique to the Y direction, the obliquely arranged roller 20 bends and deflects the electrode foil 30 around the axis of the roller 20, meanwhile, a plurality of balls 201 arranged at intervals on the circumferential surface of the roller 20 abut against the electrode foil 30 to deform the electrode foil 30 in the direction away from the roller 20, the roller 20 capable of rotating around the axis thereof causes the balls 201 on the surface to slide obliquely and intermittently relative to the foil surface of the electrode foil 30, the oblique acting force is eliminated under the rolling acting force of the balls 201, and oblique cracks are generated on the foil surface of the electrode foil 30 under the rolling tension.
As shown in fig. 3, fig. 3 shows a crack effect view observed under a microscope after a sample of the electrode foil 30 cut after the electrode foil 30 is processed by a conventional method, a roller 20 of the conventional method is a smooth roller, the roller 20 is perpendicular to the conveying direction of the conveying trough 10, the foil moving direction of the electrode foil 30 on a horizontal plane is a one-way foil moving direction, the foil moving direction does not deviate, it can be found from fig. 3 that cracks are distributed in the vertical direction in which the axes of the roller 20 extend, that is, the direction of the cracks on the surface of the electrode foil 30 extends along the width direction of the electrode foil 30, the distribution direction is single, and the electrode foil 30 processed by the conventional method has bending resistance only in one direction.
As shown in fig. 7, fig. 7 shows a view of crack effect observed when a sample of the electrode foil 30 taken after being processed by the electrode foil processing apparatus according to embodiment 1 of the present invention is placed under a microscope, which is different from the conventional method in that the existing smooth surface roller 20 is replaced with a roller 20 having a ball 201 embedded therein, and embodiment 1 is an electrode foil processing apparatus using a roller 20 having an inclined angle of 45 ° with respect to the X-direction. In the foil moving process, the electrode foil 30 deviates along the deviation direction of the roller 20, and the oblique acting force is eliminated under the rolling acting force of the ball 201, so that the crack effect distribution is more uniform, and the original unidirectional arrangement edges are arranged in multiple directions. As shown in fig. 7, the left-right direction of the drawing is the width direction (X direction) of the electrode foil 30, the up-down direction of the drawing is the foil running direction (Y direction) of the electrode foil 30, cracks in the X direction of the foil surface of the electrode foil 30 are more obvious, cracks in the Y direction of the foil surface of the electrode foil 30 are short and fine, some cracks in the Y direction are connected to cracks in the X direction, and cracks in other directions are more fine than cracks in the X direction and the Y direction, and since the roll 20 in embodiment 1 forms an angle of 45 ° with the X direction and the roll forming an angle of 45 ° with the opposite angle of 45 ° (i.e., 135 °) forms an angle of 90 °, cracks in the X direction and cracks in the Y direction, which are substantially perpendicular to each other, appear on the foil surface of the electrode foil 30, so that the electrode foil 30 after being processed in embodiment 1 has better bending resistance in the X direction and the Y direction. The cracks in other directions radially appear at each part of the foil surface of the electrode foil 30 or at a junction between the crack in the X direction and the crack in the Y direction as a radial center point. The electrode foil 30 processed by the electrode foil processing apparatus according to embodiment 1 has a bending resistance in a plurality of directions.
As shown in fig. 8, fig. 8 is a view showing the effect of cracks observed when a sample of the electrode foil 30 cut out after being processed by the electrode foil processing apparatus according to embodiment 2 of the present invention is placed under a microscope, and embodiment 2 is an electrode foil processing apparatus using a roll 20 having an inclined angle of 25 ° with respect to the X-direction. As shown in fig. 8, the left-right direction of the drawing is the width direction (X direction) of the electrode foil 30, the up-down direction of the drawing is the foil running direction (Y direction) of the electrode foil 30, the electrode foil 30 has a plurality of cracks with an angle of about 50 ° with the X direction or the Y direction, the crack effect is remarkable, and the cracks are distributed in a scattering manner, and most of the cracks are three cracks with an angle of about 120 ° adjacent to each other, and the cracks are connected at a scattering center point. However, the structure has fewer cracks, and most of the cracks on the foil surface of the electrode foil 30 are disordered and fine, and have regular shapes. Since the roll 20 in embodiment 2 forms an angle of 25 ° with the X direction, and the roll forming an angle of 25 ° with the X direction is 50 ° with the roll forming an angle of 25 ° (i.e., 135 °), cracks having an angle of about 50 ° with the X direction or the Y direction appear on the foil surface of the electrode foil 30, so that the electrode foil 30 processed in embodiment 1 has better bending resistance in the X direction and the Y direction. As can be seen from the figure, although the foil surface of the electrode foil 30 has a multi-directional crack effect, compared with the crack effect of embodiment 1, most of the cracks formed in embodiment 2 have an insignificant crack effect, an uneven arrangement effect, and a disordered orientation arrangement, and the multi-directional bending resistance of the electrode foil 30 processed by the electrode foil processing apparatus of embodiment 1 is superior to that of the electrode foil 30 processed by the electrode foil processing apparatus of embodiment 2.
Performance testing
Using a foil bending performance tester to detect the bending resistance of the electrode foil 30 without processing and the three electrode foils 30, shaking a bending machine for counting, taking 90 degrees as one time, stopping counting until the electrode foil 30 is broken, and obtaining the number of times, namely the bending resistance times, wherein the actual detection result is as follows;
from the table, it can be concluded that: the crack-free treated electrode foil 30 has little ability to bend in any orientation; the conventionally processed electrode foil 30 has bending resistance in only one Y direction; the foil processed by the electrode foil processing device provided by the embodiment 2 has bending resistance in X, Y direction, but the cracking effect is not obvious and the distribution is not uniform, the bending times are less than that of the electrode foil 30 processed by the electrode foil processing device provided by the embodiment 2, the electrode foil 30 processed by 45-degree shift processing of the roller 20 has multiple bending resistance in X, Y direction, the orientation and the bending times are optimized, and the electrode foil 30 with good deformation capability in any direction can be prepared under the condition.
Preferably, the inclined angle between the axis extending direction of the roller 20 and the X direction is preferably 45 °.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (12)
1. An electrode foil processing apparatus, characterized by comprising:
the conveying trough is used for conveying the electrode foil, a plurality of rollers capable of rotating around the axis of the rollers are arranged in the conveying trough, and the rollers are obliquely arranged in the conveying trough;
the circumferential surface of the roller is provided with a plurality of balls capable of rotating around the spherical center of the roller, and the balls are abutted to the electrode foil.
2. The electrode foil processing apparatus according to claim 1, wherein the rollers are disposed in the feed groove so as to be staggered up and down in sequence in the direction in which the electrode foil is fed.
3. The electrode foil processing apparatus as claimed in claim 2, wherein axes of the rollers on the same side are in the same horizontal plane.
4. The electrode foil processing apparatus as claimed in claim 1, wherein the roll rolls are inclined at the same angle.
5. The electrode foil processing apparatus as claimed in claim 1, wherein the rollers in the conveying trough are sequentially arranged in groups of two rollers along the foil feeding direction of the electrode foil, and the rollers in the same group are inclined in the same direction.
6. The electrode foil processing apparatus according to claim 5, wherein the rollers in adjacent two sets are inclined in opposite directions.
7. The electrode foil processing apparatus as claimed in claim 1, wherein the roller has a plurality of ball grooves formed on a surface thereof, the ball grooves being adapted to the balls, the balls being disposed in the ball grooves;
the groove depth of the ball groove is larger than the radius of the ball, the opening diameter of the ball groove is smaller than the diameter of the ball, and the ball at least partially protrudes out of the circumferential side wall of the roller.
8. The electrode foil processing apparatus as claimed in claim 1, wherein the diameter of the roller is in a range of 8mm to 12mm.
9. The electrode foil processing apparatus as claimed in claim 1, wherein the inclined angle between the axial direction of the roller and the direction of foil feeding of the electrode foil is in the range of 45 ° to 80 °.
10. An electrode foil processing technology is characterized in that an electrode foil is wound along a first direction in a traction mode, and the electrode foil is bent and deflected around a first axial direction on a path where the electrode foil is wound, wherein the first axial direction is obliquely arranged with the first direction, and meanwhile, multiple spaced abutting points in the first axial direction abut against the electrode foil along a first radial direction to enable the electrode foil to be deformed away from the first axial direction; the single abutting points are intermittently and relatively slid on the electrode foil surface.
11. The electrode foil machining process of claim 10, wherein the magnitude of the angle of inclination between the first direction and the first axis is in a range of 45 ° -80 °.
12. The electrode foil is characterized in that the front foil surface and the back foil surface of the electrode foil are provided with a plurality of cracks extending in multiple directions.
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| CN202210921794.XA CN115331963B (en) | 2022-08-02 | 2022-08-02 | Electrode foil processing device, electrode foil processing technology and electrode foil |
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| CN202210921794.XA CN115331963B (en) | 2022-08-02 | 2022-08-02 | Electrode foil processing device, electrode foil processing technology and electrode foil |
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| CN115331963A true CN115331963A (en) | 2022-11-11 |
| CN115331963B CN115331963B (en) | 2024-06-07 |
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| CN115331963B (en) | 2024-06-07 |
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