CN220474697U - Multipolar ear cylinder electricity core flattening device - Google Patents

Abstract

The utility model discloses a multipole lug cylindrical cell flattening device, which belongs to the technical field of lithium battery production equipment, and mainly adopts the technical scheme that the flattening device comprises a flattening mechanism, a pre-folding mechanism, a flattening mechanism and a dust extraction mechanism; the smoothing mechanism comprises a roller and a pressing roller, wherein a pressing head is arranged on the pressing roller and used for pushing a tab between the roller and the pressing roller; the flattening mechanism comprises a sliding rail, a sliding table and a servo motor, wherein the sliding table is arranged on the sliding rail, the servo motor is used for driving the sliding table to slide on the sliding rail, and a flattening head is arranged on the sliding table; the dust extraction mechanism is arranged on the sliding table. According to the utility model, the problems that the stroke of the existing flattening device is inconvenient to control, the pole lugs are easy to be reversely inserted into the battery core and dust and fragments are easy to be generated are solved by arranging the servo motor, the flattening groove with the gradually increased size and the dust extraction mechanism, so that the yield of battery core products is improved, and the safety risk of the battery core is reduced.

Description

Multipolar ear cylinder electricity core flattening device

Technical Field

The utility model relates to the technical field of lithium battery production equipment, in particular to a multi-lug cylindrical cell flattening device.

Background

The lug of the cylindrical battery is positioned at two ends of the battery core, after the bare battery core is coiled, the lug end is not smooth and sharp enough, and the stable connection relation is formed by welding with the current collecting disc, so that the cylindrical battery needs to be kneaded and flattened, wherein the kneading and flattening operation is conducted on the battery core with the whole lug, and the flattening operation is conducted on the battery core with the multi-lug. In production, special rubbing and flattening equipment is often adopted to rub and flatten the lug, and the main principle is that axial force is applied to the end part of the lug so as to flatten the end part of the lug.

For example, chinese patent document with grant publication number CN214898787U discloses a full tab battery winding and flattening device, comprising: battery clamping device and rub flat device. The device comprises a battery clamping device, a flat head rolling assembly, a battery clamping device and a flat head rolling assembly, wherein the flat head rolling assembly can move along the direction close to or far away from the battery clamping device, the flat head rolling assembly is mounted on the flat head rolling device, the flat head rolling assembly can feed along the radial direction parallel to the pre-pressed flat end face of the battery winding core of the full tab, and the battery clamping device and the flat head rolling device can relatively rotate, so that the flat head rolling assembly can press the tabs on the battery winding core of the full tab one by one from outside to inside. The rubbing device can stably press the lugs in the same direction, and the contact effect between all lugs of the whole lugs is improved.

However, the conventional tab flattening device similar to the above flattening device has the following drawbacks: (1) the multipolar ear cell is formed by die cutting, and acting force is applied to the end part of the multipolar ear cell through a flattening process, so that the multipolar ear cell is in risk of being reversely inserted into the cell, and potential safety hazards are brought; (2) in the flattening process, dust and fragments can be generated due to larger stress of the electrode lugs, so that the discharge capacity of the battery cell is affected; (3) during the flattening operation, the stroke of the pressure equipment is inconvenient to control, and the risk of crushing the end part of the winding core exists, so that poor products are caused.

In view of this, improvements to existing tab flattening devices are needed.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a multipolar ear cylindrical cell flattening device, which aims to solve the problems that the stroke of the existing flattening device is inconvenient to control, the electrode ears are easy to be reversely inserted into a cell and dust and scraps are easy to be generated, thereby improving the yield of cell products and reducing the safety risk of the cell.

The utility model discloses a multipole-ear cylindrical cell flattening device, which comprises a flattening mechanism, a pre-folding mechanism, a flattening mechanism and a dust extraction mechanism, wherein the flattening mechanism is arranged on the multipole-ear cylindrical cell; the smoothing mechanism comprises a roller and a pressing roller, wherein a pressing head is arranged on the pressing roller and used for pushing a tab between the roller and the pressing roller; the flattening mechanism comprises a sliding rail, a sliding table and a servo motor, wherein the sliding table is arranged on the sliding rail, the servo motor is used for driving the sliding table to slide on the sliding rail, and a flattening head is arranged on the sliding table; the dust extraction mechanism is arranged on the sliding table.

Preferably, the ram is of a tapered configuration, the ram having a tapered outer peripheral surface.

Preferably, the pre-folding mechanism and the smoothing mechanism have the same structure.

Preferably, the passing roller and the pressing roller are cylindrical rollers, and the axes of the passing roller and the pressing roller are parallel; the pressing roller is close to or far away from the passing roller in a sliding manner.

Preferably, at least two flattening heads are arranged on the sliding table, one flattening head is provided with a pressure sensor, and the other flattening head is provided with a flattening groove.

Preferably, the flattening groove is a conical groove.

Preferably, three flattening heads are provided with the flattening grooves, each flattening head is provided with one flattening groove, the taper angles of the three flattening grooves are the same, and the bottom radii of the three flattening grooves are sequentially increased.

Preferably, the taper of the flattening groove is between 40 and 60 degrees.

Preferably, the sliding rail, the sliding table and the servo motor are provided with two groups, and the flattening heads on the two sliding tables are arranged in a straight line in a pair-by-pair mode.

Preferably, the dust extraction mechanism comprises a dust extraction pipe and a dust extraction cover, wherein the dust extraction pipe is arranged on the sliding table, and the dust extraction cover is arranged on the flattening head provided with the pressure sensor.

The utility model has the beneficial effects that:

firstly, before flattening, the lugs of the pole pieces are flattened and pre-folded through the flattening mechanism and the pre-folding mechanism, so that the lugs on the pole pieces can be straightened, interference among the lugs is avoided, the coiled lugs have a pre-bending angle, and pressure control is easier to carry out in the same direction during flattening;

secondly, a servo motor is adopted to control a plurality of groups of flat-pressing heads to gradually flatten the lugs at the end part of the battery cell, so that the stroke of the servo motor is controlled, the pressure of flattening is controlled, the flat-pressing heads are prevented from damaging the lugs or winding the battery cell, the flattening grooves with gradually increased sizes can greatly prevent the lugs from being reversely inserted into the battery cell, and the product yield of the battery cell is improved; the pressure sensor can feed back pressure data when the electric core or the electrode lug is finally flattened, and the feeding amount is adjusted and corresponding actions are executed according to the pressure data when the electric core or the electrode lug is flattened, so that the risk of damaging the electric core or the electrode lug during flattening operation is further reduced;

thirdly, on the one hand, the dust extraction mechanism can absorb dust and fragments generated in the flattening process through the dust extraction pipe, reduce the risk that the dust and fragments enter the battery cell, on the other hand, axial dust extraction can be carried out on the end part of the battery cell through the dust extraction cover, and the end part lug of the battery cell after final flattening is clean and dust-free fragments are accumulated, so that the product yield of the battery cell is ensured.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

FIG. 1 is a schematic view of the smoothing mechanism and the flattening mechanism of the present utility model;

FIG. 2 is a schematic diagram of a flattening mechanism and a dust extraction mechanism according to the present utility model;

fig. 3 is a schematic diagram of a second embodiment of the flattening mechanism and the dust extraction mechanism of the present utility model, for illustrating a flattening groove.

Reference numerals illustrate: 01. a frame; 1. a smoothing mechanism; 11. passing through a roller; 12. a press roller; 121. a pressure head; 2. a pre-folding mechanism; 3. a flattening mechanism; 31. a sliding table; 32. a slide rail; 33. a servo motor; 34. flattening the end; 341. flattening the groove; 342. a pressure sensor; 4. a dust extraction mechanism; 41. a dust extraction pipe; 42. a dust extraction cover.

Detailed Description

Various embodiments of the utility model are disclosed in the following drawings, in which details of the practice are set forth in the following description for the purpose of clarity. However, it should be understood that these practical details are not to be taken as limiting the utility model. That is, in some embodiments of the utility model, these practical details are unnecessary. Moreover, for the sake of simplicity of the drawing, some well-known and conventional structures and elements are shown in the drawings in a simplified schematic manner.

It should be noted that all directional indications such as up, down, left, right, front, and rear … … in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture such as that shown in the drawings, and if the particular posture is changed, the directional indication is changed accordingly.

In addition, the descriptions of the "first", "second", etc. in this application are for descriptive purposes only and are not intended to specifically indicate a sequential or a cis-position, nor are they intended to limit the utility model, but are merely intended to distinguish between components or operations described in the same technical term, and are not to be construed as indicating or implying a relative importance or implying that the number of technical features indicated is not necessarily limited. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

For a further understanding of the utility model, its features and advantages, reference is now made to the following examples, which are illustrated in the accompanying drawings in which:

referring to fig. 1-3, the multipole cylindrical cell flattening device disclosed by the utility model comprises a flattening mechanism 1, a pre-folding mechanism 2, a flattening mechanism 3 and a dust extraction mechanism 4, wherein the flattening mechanism 1 and the pre-folding mechanism 2 are both arranged on a frame 01 for mounting equipment, the flattening mechanism 1 is arranged behind an unreeling mechanism of a pole piece winding machine (not shown in the figure) and is used for keeping the pole lugs of multipole pole pieces in a flat state, and the pre-folding mechanism 2 is used for further bending the pole lugs so as to form a certain bending angle between the pole lugs and other areas of the pole pieces; specifically, the smoothing mechanism 1 comprises a roller 11 and a pressing roller 12, the roller 11 and the pressing roller 12 are cylindrical rollers, the roller 11 and the pressing roller 12 are rotatably supported on a frame 01, the axis of the roller 11 is parallel to the axis of the pressing roller 12, the pressing roller 12 is also in sliding connection with the frame 01, and the pressing roller 12 can be close to or far away from the roller 11 by sliding on the frame 01.

Referring to fig. 1, a pressing head 121 is provided at one end of a pressing roller 12, the pressing head 121 has a tapered structure, the pressing head 121 has a tapered outer circumferential surface and is coaxially arranged with the pressing roller 12, when a multi-pole tab passes between a passing roller 11 and the pressing roller 12, the pressing head 121 can squeeze the pole tab, so that the direction of pushing the pole tab is changed, and the pole tab is smoothed; the pre-folding mechanism 2 is the same as the smoothing mechanism 1, and also comprises a roller 11 and a press roller 12 with a press head 121, and in the pre-folding mechanism 2, after the press head 121 of the press roller 12 presses the tab, the tab can be pushed to bend relative to the surface of the pole piece, so that the tab forms a certain bending angle relative to the pole piece.

Referring to fig. 2 and 3, after being processed by a smoothing mechanism 1 and a pre-folding mechanism 2, the multipole ear pole piece enters a winding machine to be manufactured into a winding core, and then the winding core enters a flattening mechanism 3 to perform flattening operation of the end multipole ear; the flattening mechanism 3 comprises a sliding table 31, sliding rails 32, a servo motor 33, a flattening head 34 and a controller (not shown in the figure), wherein the sliding table 31, the sliding rails 32 and the servo motor 33 are respectively provided with two groups, the sliding rails 32 are of a linear structure, the two sliding rails 32 are parallel to each other, the sliding rails 32 of each group are arranged on a frame 01, the sliding table 31 is slidably arranged on the sliding rails 32, the servo motor 33 is arranged on the sliding table 31, and the servo motor 33 is used for driving the sliding table 31 to move on the sliding rails 32; a plurality of flattening heads 34 for flattening the tabs are arranged on each sliding table 31, the flattening heads 34 are cavities provided with grooves, in the embodiment, four flattening heads 34 are arranged on each sliding table 31, and the flattening heads 34 on the two sliding tables 31 are arranged in a pair and two pairs along the linear direction of the sliding rail 32.

Referring to fig. 2 and 3, in the four flattening heads 34 on each sliding table 31, a conical groove is formed in each of the three flattening heads 34, the conical groove is a flattening groove 341, a pressure sensor 342 is installed in the other flattening head 34, the conicity of the three flattening grooves 341 is the same and is the same value between 40 degrees and 60 degrees, but the radius of the bottom surfaces of the three flattening grooves 341 is sequentially increased; on the two sliding tables 31, along the linear direction of the sliding rail 32, the flattening head 34 provided with the flattening groove 341 corresponds to the other flattening head 34 provided with the flattening groove 341, the flattening head 34 provided with the pressure sensor 342 corresponds to the other flattening head 34 provided with the pressure sensor 342, and the flattening grooves 341 of the two corresponding flattening heads 34 are flattening grooves 341 with the same size; three sets of flattening heads 34 with flattening grooves 341 are used for flattening the tabs step by step, while flattening heads 34 with pressure sensors 342 are used for flattening the tabs finally and detecting the pressure applied by the flat heads 34 to the tabs at the ends of the cells.

Each servo motor 33 is connected with the controller, each pressure sensor 342 is also connected with the controller, an operator can control the feeding amount of the servo motor 33 through the controller, so that the two sliding tables 31 are driven to be close to each other, the flattening heads 34 flatten the lugs, and the three groups of flattening grooves 341 with progressive size are arranged, so that the stroke of the servo motor 33 is controlled, and the situation that the lugs or the winding cores are damaged by pressing or the lugs are reversely inserted into the battery cores is avoided; the pressure sensor 342 can feed back pressure data to the controller when finally flattening, so that the controller adjusts the feeding amount of the servo motor 33 according to the pressure data and executes corresponding actions, and the risk of damaging the battery cell or the tab during flattening is further reduced.

Referring to fig. 2 and 3, the dust extraction mechanism 4 includes a dust extraction pipe 41 and a dust extraction cover 42, the dust extraction pipe 41 is mounted on the sliding table 31, the dust extraction pipe 41 is connected with a negative pressure device (not shown in the figure), the dust extraction pipe 41 can absorb dust and debris at each flattening head 34, so that the risk that the dust and debris enter the inside of the battery cell is reduced, the dust extraction cover 42 is mounted on the flattening head 34 provided with a pressure sensor 342 and is arranged opposite to the pressure sensor 342, the dust extraction cover 42 is also connected with the negative pressure device (not shown in the figure), the dust extraction cover 42 can extract dust at the end of the battery cell, and the cleaning of the end tab of the battery cell after final flattening is ensured without dust and debris accumulation.

The implementation principle and the beneficial effects of the utility model are as follows:

firstly, before flattening, the lug of the pole piece is flattened and pre-folded through the flattening mechanism 1 and the pre-folding mechanism 2, so that the lug on the pole piece can be straightened, interference between the lugs is avoided, the coiled lug has a pre-bending angle, and pressure control is easier to be carried out in the same direction during flattening;

secondly, the servo motor 33 is adopted to control the multiple groups of flat-pressing heads 34 to flatten the lugs at the end part of the battery cell step by step, which is favorable for controlling the stroke of the servo motor 33 and controlling the flattening pressure, so that the flat-pressing heads 34 are prevented from damaging the lugs or winding the battery cell, and the flattening grooves 341 with increasing size can greatly prevent the lugs from being reversely inserted into the battery cell, thereby improving the product yield of the battery cell; the pressure sensor 342 can feed back pressure data when the electric core or the electrode lug is finally flattened, and the feeding amount is adjusted and corresponding actions are executed according to the pressure data when the electric core or the electrode lug is flattened, so that the risk of damaging the electric core or the electrode lug during flattening operation is further reduced;

thirdly, the dust extraction mechanism 4 can absorb dust and fragments generated in the flattening process through the dust extraction pipe 41 on one hand, reduce the risk that the dust and fragments enter the battery cell, and can carry out axial dust extraction on the end part of the battery cell through the dust extraction cover 42 on the other hand, so that the end part lug of the battery cell after final flattening is clean and dust-free fragments are accumulated, and the product yield of the battery cell is ensured.

The above is merely an embodiment of the present utility model, and is not intended to limit the present utility model. Various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of the present utility model, should be included in the scope of the claims of the present utility model.

Claims (10)

1. The multi-lug cylindrical cell flattening device is characterized by comprising a flattening mechanism (1), a pre-folding mechanism (2), a flattening mechanism (3) and a dust extraction mechanism (4); the leveling mechanism (1) comprises a roller (11) and a press roller (12), a press head (121) is arranged on the press roller (12), and the press head (121) is used for pushing a tab between the roller (11) and the press roller (12);

the flattening mechanism (3) comprises a sliding rail (32), a sliding table (31) arranged on the sliding rail (32) and a servo motor (33), wherein the servo motor (33) is used for driving the sliding table (31) to slide on the sliding rail (32), and a flattening head (34) is arranged on the sliding table (31); the dust extraction mechanism (4) is arranged on the sliding table (31).

2. The multipole-ear cylindrical cell flattening apparatus of claim 1, wherein the ram (121) is of a tapered configuration, the ram (121) having a tapered outer peripheral surface.

3. Multipole-ear cylindrical cell flattening device according to claim 1, characterized in that the pre-folding mechanism (2) has the same structure as the flattening mechanism (1).

4. A multipole-ear cylindrical cell flattening device according to any of the claims 1-3, characterized in that the over-roller (11) and the press roller (12) are cylindrical rollers, the axes of the over-roller (11) and the press roller (12) being parallel; the pressing roller (12) is close to or far away from the passing roller (11) in a sliding manner.

5. A multipole ear cylindrical cell flattening apparatus as in any of the claims 1-3, wherein at least two flattening heads (34) are provided on the sliding table (31), wherein one of the flattening heads (34) is provided with a pressure sensor (342), and the other flattening head (34) is provided with a flattening groove (341).

6. The multipole-ear cylindrical cell flattening apparatus of claim 5, wherein the flattening slot (341) is a conical slot.

7. The multi-pole cylindrical cell flattening apparatus as claimed in claim 6, wherein three flattening heads (34) provided with the flattening grooves (341) are provided, one flattening groove (341) is provided on each flattening head (34), the conicity of the three flattening grooves (341) is the same, and the bottom radii of the three flattening grooves (341) are sequentially increased.

8. The multipole-ear cylindrical cell flattening apparatus of claim 6, wherein the taper of the flattening grooves (341) is between 40 ° and 60 °.

9. The multipole-ear cylindrical cell flattening device according to claim 5, wherein two groups of sliding rails (32), sliding tables (31) and servo motors (33) are arranged, and two flattening heads (34) on two sliding tables (31) of two groups are arranged in a straight line in a pair.

10. The multipole-ear cylindrical cell flattening apparatus according to claim 5, wherein the dust extraction mechanism (4) comprises a dust extraction pipe (41) and a dust extraction cover (42), the dust extraction pipe (41) is mounted on the sliding table (31), and the dust extraction cover (42) is mounted on the flattening head (34) provided with the pressure sensor (342).