CN217889364U - Lithium battery tab flattening device - Google Patents

Abstract

The utility model provides a lithium battery tab smooths device, include: the device comprises a roller, a counter press roller, a first gear, a second gear and a driving mechanism, wherein the roller is arranged in parallel with the counter press roller, the roller surface of the counter press roller is matched with the size of a lug to be smoothed along the axial length, the first gear is connected with the roller, the second gear is connected with the counter press roller, the first gear is meshed with the second gear, and the driving mechanism is electrically connected with the first gear or the second gear. The utility model discloses a single actuating mechanism drives engaged with first gear and second gear in opposite directions and rotates in order to drive the roller and to the compression roller rotation in opposite directions, carries out the developments to the utmost point ear of raising up from this and smooths, eliminates the fold on utmost point ear surface, can effectively avoid current adoption to smooth the utmost point ear tear the problem that can not effectively smooth or lead to that the board exists when smoothing, and compare in static mode of smoothing, can effectively prevent utmost point ear from skidding, further improve and smooth the effect.

Description

Lithium battery tab flattening device

Technical Field

The utility model relates to a lithium battery technology field especially relates to a lithium battery tab smooths device.

Background

The positive and negative current collectors of the lithium ion battery are respectively an aluminum foil and a copper foil, a slurry coating area and non-coating areas positioned on two sides of the slurry coating area, also called a blank area, are arranged on the current collectors, the slurry coating area of the current collectors is rolled after electrode slurry coating is completed to obtain a pole piece base material, and then the pole piece and a pole lug are connected through cutting and die cutting. The pole piece is formed by cutting the slurry coating area, the thickness of the non-coating area is smaller than that of the slurry coating area because the slurry layer is not coated in the non-coating area, and the pole piece is formed in the area through die cutting. Among the prior art, select for use circular roller of crossing usually when rolling the utmost point ear, and during the roller of crossing after utmost point ear shaping, the position that utmost point ear and pole piece are connected can laminate and cross the roller, and the utmost point ear of keeping away from the pole piece position is because receive pulling force and be close to the inconsistent and perk of pole piece position pulling force when high-speed production, consequently forms crescent fold between two positions of utmost point ear. When the pole lugs are tilted, the pole lugs are wrinkled, damaged or even torn after repeatedly passing through the roller, and the poor pole lugs can cause the reduction of the production yield or generate great adverse effects on the performance of the product, so that the reliability of the produced lithium battery product is reduced.

In order to solve the problems, a flattening plate is usually adopted to flatten the lug in the prior art. Specifically, a flattening plate which is matched with the roller diameter and has a certain radian is added on the side of the roller, and the polar ears are flattened by utilizing a gap between the flattening plate and the roller. However, when the gap is too large, the lug cannot be effectively leveled, and when the gap is too small, the raised lug can directly interfere with the leveling plate, so that the lug is torn. And the static flattening mode that the compression roller is not moved is generally adopted in the prior art, the pole lugs are easy to slip, and the flattening effect is influenced.

SUMMERY OF THE UTILITY MODEL

In view of the above prior art's shortcoming, the utility model aims to provide a lithium battery tab smooths device for solve and adopt among the prior art and smooths the board in the setting of roller side, utilize and smooths the board and cross the clearance between the roller and to smooth the mode that the utmost point ear exists because of the clearance when too big, can not effectively smooth, or when the clearance is too small, the utmost point ear of perk can be direct and smooth the board and interfere and lead to the utmost point ear to tear, and prior art generally adopts statically to smooth, utmost point ear skids easily, the influence smooths effect scheduling problem.

In order to realize above-mentioned purpose and other relevant purposes, the utility model provides a lithium battery tab smooths device, include: the device comprises a roller, a counter pressure roller, a first gear, a second gear and a driving mechanism, wherein the roller and the counter pressure roller are arranged in parallel, the roller surface of the counter pressure roller is matched with the size of a lug to be flattened along the axial length, the first gear is connected with the roller, the second gear is connected with the counter pressure roller, the first gear is meshed with the second gear, and the driving mechanism is electrically connected with the first gear or the second gear.

Optionally, the smoothing device for the lithium battery tabs further comprises a mounting frame, and the roller passing and the counter-pressing roller are mounted on the mounting frame.

Optionally, the lithium battery tab flattening device further comprises a limiting adjusting mechanism for adjusting the distance between the roller and the counter-pressing roller, and the limiting adjusting mechanism is arranged between the roller and the counter-pressing roller.

Optionally, the roller and the counter-pressure roller are both rigid rollers or rubber rollers.

Optionally, the lithium battery tab flattening device further comprises a heating mechanism connected with the roller and/or the counter-pressing roller.

More optionally, the heating mechanism comprises a heating resistance wire wound in the over-roll and/or the counter-roll.

Optionally, the lithium battery tab flattening device further comprises a temperature controller electrically connected with the heating mechanism.

Optionally, the radius of the over-roll and the counter-roll is different, and the radius of the first gear and the second gear is different.

Optionally, the lithium battery tab flattening device further comprises a guide mechanism arranged on the outer side of the roller.

Optionally, the lithium battery tab flattening device further comprises a sensor for monitoring whether the tab to be flattened is displaced.

As above, the utility model discloses a lithium battery tab smooths device has following beneficial effect: the utility model discloses a single actuating mechanism drives engaged with first gear and second gear in opposite directions rotatory in order to drive the roller and to the compression roller rotation in opposite directions, carries out the developments from this to the utmost point ear of raising up and smoothes, can effectively avoid current adoption to smooth the utmost point ear tear problem that the board exists when smoothing that can not effectively smooths or lead to, and compare in static mode of smoothing, can increase and the friction of utmost point ear, prevent effectively that utmost point ear from skidding, further improve and smooth the effect.

Drawings

Fig. 1 shows that the utility model provides a lithium battery tab smooths device's exemplary structure schematic diagram.

Description of the element reference

11. Roller

12. Counter-pressure roller

121. Roll surface

13. First gear

14. Second gear

15. Mounting rack

16. Limiting and adjusting mechanism

Detailed Description

The following embodiments of the present invention are provided by way of specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. As in the detailed description of the embodiments of the present invention, the cross-sectional views illustrating the device structure are not partially enlarged in general scale for convenience of illustration, and the schematic views are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.

For convenience in description, spatial relational terms such as "below," "beneath," "below," "under," "over," "upper," and the like may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that these terms of spatial relationship are intended to encompass other orientations of the device in use or operation in addition to the orientation depicted in the figures. In addition, when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present.

In the context of this application, a structure described as a first feature being "on" a second feature may include embodiments where the first and second features are formed in direct contact, and may also include embodiments where additional features are formed in between the first and second features, such that the first and second features may not be in direct contact.

It should be noted that the drawings provided in the present embodiment are only for schematically illustrating the basic concept of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, amount and proportion of each component may be changed arbitrarily and the layout of the components may be more complicated. In order to keep the drawings as concise as possible, not all features of a single figure may be labeled in their entirety.

Please refer to fig. 1.

As shown in fig. 1, the utility model provides a lithium battery tab smooths device, include: the device comprises a roller 11, a counter roller 12, a first gear 13, a second gear 14 and a driving mechanism (not shown), wherein the driving mechanism can be a stepping motor for precisely controlling the rotation speed of the gears, the roller 11 and the counter roller 12 are arranged in parallel, the length of a roller surface 121 of the counter roller 12 along the axial direction is matched with the size of a lug to be smoothed, the first gear 13 is connected with the roller 11, the second gear 14 is connected with the counter roller 12, the first gear 13 is meshed with the second gear 14 (therefore, the meshed position of the first gear and the second gear is positioned outside the roller surface of the counter roller, in some examples, under the condition that the rotation of the roller and the gears is not influenced, a blocking structure can be arranged between the meshed position and the roller surface of the counter roller to prevent the lug from contacting the gear due to offset), and the driving mechanism is electrically connected with the first gear 13 or the second gear 14; the roller 11 and the opposite compression roller 12 both comprise a roller shaft and a roller barrel sleeved on the roller shaft, the first gear 13 is connected with the roller barrel of the roller 11 through a bearing, and the second gear 14 is connected with the roller barrel of the opposite compression roller 12 through a bearing so as to drive the gear to rotate through a driving mechanism, and accordingly, the corresponding roller barrel is driven to rotate. The exemplary working process of the lithium battery tab flattening device provided by the embodiment is as follows: to treat that the utmost point ear of pacifying unreels to crossing between roller 11 and the compression roller 12 along the tangential to compression roller 12, utmost point ear and the roll surface axial alignment to compression roller 12, ensure utmost point ear can be complete with the roll surface contact to compression roller 12 in pacifying the in-process, adjust roller 11 and the clearance to compression roller 12, in order to compress tightly utmost point ear, actuating mechanism opens, it is rotatory to drive first gear 13 or second gear 14, under the meshing effect, it is rotatory to drive another gear of engaged with, drive from this and cross roller 11 and rotate in order to drive utmost point ear to compression roller 12 in opposite directions, in addition can also be under unwinding mechanism's transmission, the utmost point ear that plays is in proper order through crossing roller 11 and to smooth the plastic between compression roller 12, eliminate the fold on utmost point ear surface, can effectively avoid the current utmost point ear tear the problem that can not effectively flatten or lead to the fact of rising that exists when pacifying the board and smooth. Simultaneously, drive simultaneously through single actuating mechanism in this embodiment and cross the roller and to the compression roller rotation in opposite directions in order to carry out the developments and smooth, compare in static mode of smoothing, can increase and the frictional force of utmost point ear, effectively prevent that utmost point ear from skidding, further improve and smooth the effect.

The feed roller 11 and the counter-pressure roller 12 can be fixed in a suitable manner, for example by means of different fixing elements. In a preferred example, the lithium battery tab flattening device further includes a mounting frame 15, the over roll 11 and the counter roll 12 are mounted on the mounting frame 15, for example, the mounting frame 15 is a stainless steel frame, and is provided with mounting holes, and the roll shafts of the over roll 11 and the counter roll 12 are fixed in the corresponding mounting holes, and both of the over roll 11 and the counter roll 12 may be fixed in the same mounting hole with a certain width, or may be respectively located in two different mounting holes, and both ends of the roll shaft of the over roll 11 and the counter roll 12 may be mounted on the mounting frame 15, or one end of the roll shaft is mounted on the mounting frame 15 and the other end of the roll shaft is fixed in another manner, which is not limited in this respect. In order to meet the requirement of flattening lugs with different sizes, the lithium battery lug flattening device can further comprise a limit adjusting mechanism 16 for adjusting the distance between the over-roller 11 and the counter-pressure roller 12. The mounting position of the limit adjustment mechanism 16 differs depending on its specific type. For example, the limit adjusting mechanism 16 may be a mechanism including a spring, which may be mounted on the counter pressure roller 12 and abut against the roller 11, and adjust the distance between the roller 11 and the counter pressure roller 12 by adjusting the degree of compression of the spring. In other examples, the mounting hole of the mounting frame 15 may be a kidney-shaped hole, a plurality of fixing grooves may be formed in the kidney-shaped hole, and the gap between the roller 11 and the counter roller 12 may be adjusted by mounting the roller of the roller 11 and/or the counter roller 12 into different fixing grooves. Or in other examples, different radii of the pass roller 11 and/or the counter-press roller 12 may also be used to adjust the gap between the two.

The over-roll 11 and the counter-roll 12 of the present embodiment may be made of any suitable material. In a preferred example, the material of the over-roll 11 and the counter-roll 12 is preferably the same, so as to provide more uniform pressure to the opposite sides of the tab, and achieve a better flattening effect. For example, the roll 11 and the counter roll 12 may be both rigid rolls or both rubber rolls (a composite structure in which the surface of a metal roll is covered with a heat-resistant layer such as a rubber layer). The roll diameters of the two can be set according to requirements, and can be the same or different, in an example, the radii of the roller 11 and the counter roller 12 are different, the radii of the first gear 13 and the second gear 14 are different, for example, the roll diameter of the roller 11 is larger than the radius of the counter roller 12, correspondingly, the radius of the first gear 13 is larger than the radius of the second gear 14, and the driving mechanism is preferably electrically connected with the gear with the smaller radius, for example, the second gear 14.

In an example, the lithium battery tab flattening device further comprises a heating mechanism (not shown) connected with the roller 11 and/or the counter-pressure roller 12 (preferably, both the roller 11 and the counter-pressure roller 12 are connected with the heating mechanism) to heat the roller 11 and/or the counter-pressure roller 12, so that the tabs are simultaneously heated in the flattening process, the material of the tabs is slightly softened, and a better flattening effect can be achieved. Under the condition that the heating mechanism is arranged, a temperature controller electrically connected with the heating mechanism can be further arranged, so that the heating temperature can be flexibly adjusted according to the conditions of different tabs (for example, the heating temperature can be adjusted according to different materials of the tabs). In a specific example, the heating mechanism may comprise a heating resistance wire wound inside the passing roller 11 and/or the counter-pressing roller 12, for example, between the corresponding roller and the roller shaft. In other examples, the heating mechanism may also inject a liquid heating medium into the corresponding roller.

In order to avoid the defects of extrusion and the like when the tabs enter or leave the lithium battery tab flattening device, the lithium battery tab flattening device can further comprise a guide mechanism arranged on the outer side of the roller 11. The guiding mechanism can be for having the deflector of curved surface, and the utmost point ear of treating to smooth gets into along guiding mechanism and crosses roller 11 and smooths between the compression roller 12, perhaps accomplishes the utmost point ear of smoothing and comes out the back from crossing roller 11 and to between the compression roller 12, moves on the guiding mechanism in order to carry out the rolling.

When the wrinkles of the tab are serious, the tab may be slightly deviated when being placed between the over-roll 11 and the counter-roll 12 and not completely aligned with the roll surface of the counter-roll 12, and the smoothing is continued in this situation, so that it is difficult to achieve the desired effect. Thus, in an example, a sensor (not shown) for monitoring whether the tab to be smoothed is displaced may be further provided, and the installation position of the sensor may be determined according to the type of the tab, for example, the sensor may be a contact sensor, in which case the sensor may be arranged on the roll surface side of the counter pressure roll 12, and when the tab is in contact with the sensor, the tab position is indicated to be displaced. Or two distance sensors, which are arranged right above the two opposite ends of the roll surface of the counter-pressure roll 12, and monitor whether the tab is displaced by measuring the width of the tab on the roll surface. And a sensor can be arranged to monitor the surface appearance of the tab before smoothing, and the gap between the roller 11 and the counter-pressure roller 12 can be adjusted according to the monitored result. Under the condition that the sensor is arranged, an alarm connected with the sensor can be further arranged to give an alarm when the deviation of the pole lugs is monitored, so that a worker is reminded of taking corresponding measures without the need of keeping an operator aside all the time, and the automation level of the whole device can be further improved.

The lithium battery tab flattening device can be used singly or in pairs so as to simultaneously flatten the tabs on two sides of the pole piece, and is specifically determined according to the structures of the pole piece and the tabs without limitation. And the embodiment is suitable for smoothing various types of tabs.

To sum up, the utility model provides a lithium battery tab smooths device, include: the device comprises a roller, a counter press roller, a first gear, a second gear and a driving mechanism, wherein the roller is arranged in parallel with the counter press roller, the length of the roller surface of the counter press roller along the axial direction is matched with the size of a lug to be smoothed, the first gear is connected with the roller, the second gear is connected with the counter press roller, the first gear is meshed with the second gear, and the driving mechanism is electrically connected with the first gear or the second gear. The utility model discloses a single actuating mechanism drives engaged with first gear and second gear in opposite directions and rotates in order to drive the roller and to the compression roller rotation in opposite directions, carry out the developments to the utmost point ear of raising up from this and smooth, eliminate the fold on utmost point ear surface, the utmost point ear tear problem that can not effectively smooth or lead to that exists when can effectively avoiding current adoption to smooth the board and smooth, and compare in the static mode of smoothing, can increase the frictional force with utmost point ear, effectively prevent utmost point ear from skidding, further improve and smooth the effect. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (10)

1. The utility model provides a lithium battery tab smooths device which characterized in that includes: the device comprises a roller, a counter press roller, a first gear, a second gear and a driving mechanism, wherein the roller is arranged in parallel with the counter press roller, the length of the roller surface of the counter press roller along the axial direction is matched with the size of a lug to be smoothed, the first gear is connected with the roller, the second gear is connected with the counter press roller, the first gear is meshed with the second gear, and the driving mechanism is electrically connected with the first gear or the second gear.

2. The lithium battery tab flattening device according to claim 1, further comprising a mounting frame, wherein the over-roll and the counter-pressure roll are mounted on the mounting frame.

3. The lithium battery tab flattening device according to claim 1, further comprising a limit adjusting mechanism for adjusting a distance between the over-roll and the counter-roll.

4. The lithium battery tab flattening device according to claim 1, wherein the roll-passing roller and the counter-pressing roller are both rigid rollers or rubber rollers.

5. The lithium battery tab flattening device according to claim 1, further comprising a heating mechanism connected to the over-roll and/or the counter-roll.

6. The lithium battery tab flattening device according to claim 5, wherein the heating mechanism comprises a heating resistance wire wound in the over-roll and/or the counter-roll.

7. The lithium battery tab flattening device according to claim 5, further comprising a temperature controller electrically connected to the heating mechanism.

8. The lithium battery tab flattening device according to claim 1, wherein the radius of the over-roll and the counter-roll is different, and the radius of the first gear and the radius of the second gear are different.

9. The lithium battery tab flattening device according to claim 1, further comprising a guide mechanism disposed outside the pass roller.

10. The smoothing device for the lithium battery tabs according to claim 1, further comprising a sensor for monitoring whether the tabs to be smoothed are displaced.

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