CN217251700U - Electricity core rolling press device - Google Patents

Abstract

The utility model relates to an electricity core processing technology field discloses an electricity core rolling press device. The battery cell rolling device comprises a workbench, a carrying platform, a rolling mechanism and a first driving piece, wherein the carrying platform is arranged on the workbench in a reciprocating motion manner along the X-axis direction and is used for carrying a battery cell; the rolling mechanism comprises a guide rod, a fixing plate, a weight and a roller, the guide rod is arranged on the workbench along the Z-axis direction, the fixing plate is slidably arranged on the guide rod in a penetrating manner, the weight is arranged at the upper end of the fixing plate, and the roller is axially arranged along the Y-axis direction and is rotatably connected to the lower end of the fixing plate; first driving piece erects in the top of workstation, and the output of first driving piece can drive and connect the fixed plate and lift up with the drive fixed plate, or breaks away from the fixed plate so that the fixed plate falls down under the action of gravity to make the gyro wheel crimping in the surface of electricity core. This electricity core rolling press device is comparatively even stable to the roll extrusion dynamics of electric core for electric core plane degree after the roll extrusion is higher.

Description

Electricity core rolling press device

Technical Field

The utility model relates to an electricity core processing technology field especially relates to an electricity core rolling press device.

Background

In the production process of the battery cell, the back of the battery cell needs to be rolled and flattened, so that the back of the battery cell reaches the target flatness through rolling. At present, the mode of force control is mostly adopted for rolling the battery cell, the mechanism is complex, the precision is poor, and the stress of the battery cell in the rolling process is uneven, so that the flatness of the back surface of the battery cell is not high. In the prior art, a self-weight is adopted to roll the back of the battery cell, but the stability of the rolling process is not high, the mechanism is easy to slightly shake, and the flatness of the back of the battery cell after rolling is influenced.

Therefore, a cell rolling apparatus is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

Based on it, an object of the utility model is to provide an electricity core rolling press device, it is comparatively even stable to the roll extrusion dynamics of electric core for electric core plane degree after the roll extrusion is higher.

In order to achieve the purpose, the utility model adopts the following technical proposal:

a cell rolling press device, comprising:

a work table;

the carrying platform is arranged on the workbench in a reciprocating manner along the X-axis direction and is used for carrying the battery cell;

the rolling mechanism comprises a guide rod, a fixing plate, a weight and a roller, wherein the guide rod is arranged on the workbench along the Z-axis direction, the fixing plate is slidably sleeved on the guide rod, the weight is arranged at the upper end of the fixing plate, and the roller is axially arranged along the Y-axis direction and is rotatably connected to the lower end of the fixing plate;

the first driving piece is erected above the workbench, and the output end of the first driving piece can be in driving connection with the fixing plate to drive the fixing plate to lift up or separate from the fixing plate to enable the fixing plate to fall under the action of gravity, and the roller is in press-connection with the surface of the battery core.

As a preferable scheme of the cell rolling device, the rolling mechanism further includes:

the connecting piece sets up the upper end of fixed plate, the connecting piece includes the limiting plate that two at least relative intervals set up, every the upper end of limiting plate is to another the direction protrusion of limiting plate is provided with the fender shoulder, the peripheral ring of the output of first driving piece is equipped with the boss, the boss is located keep off the below of shoulder to can follow the drive of first driving piece upwards lifts two keep off the shoulder or loosen two downwards keep off the shoulder.

As a preferred scheme of the battery core rolling device, an avoiding hole is formed in the fixing plate, the avoiding hole is opposite to the boss, and the boss can penetrate through the avoiding hole.

As a preferable scheme of the cell rolling device, the rolling mechanism further includes:

the lower extreme that keeps off the shoulder sets up one the bradyseism subassembly, the bradyseism subassembly includes uide pin, elastic component and baffle, the upper end of uide pin connect in keep off the shoulder, the lower extreme of uide pin is connected with the baffle, the elastic component cover is located the uide pin, the both ends of elastic component respectively the butt in the baffle with keep off the shoulder, the baffle is located the top of boss, and be located on the removal route of boss.

As a preferred scheme of the cell rolling press device, the cell rolling press device further comprises:

the limiting part is sleeved on the guide rod and located below the fixing plate, and the limiting part is used for limiting the lowest position of the fixing plate on the guide rod.

As a preferred scheme of the cell rolling press device, the battery further includes:

the weight frame is arranged on the fixing plate, and the weights are fixed on the weight frame in a penetrating mode.

As a preferred scheme of the battery cell rolling device, two weight frames are arranged, and the two weight frames are arranged on the fixing plate at intervals along the Y axis.

As a preferred scheme of the cell rolling press device, the battery further includes:

and the X-direction driving assembly is arranged on the workbench and is connected to the carrying platform in a driving manner so as to drive the carrying platform to reciprocate along the X-axis direction.

As a preferred scheme of the battery cell rolling device, the X-direction driving assembly includes a second driving member, a guide rail and a slider, the guide rail is disposed on the workbench along the X-axis direction, the slider is slidably connected to the guide rail along the X-axis direction, the second driving member is disposed on the workbench and is drivingly connected to the slider, and the carrier is fixedly connected to the slider.

As a preferred scheme of the battery cell rolling device, the X-direction driving assembly further includes a screw rod, the screw rod is disposed on the workbench along the X-axis direction, the second driving member is drivingly connected to the screw rod to drive the screw rod to rotate, and the slider is sleeved on the screw rod and is in threaded connection with the screw rod.

The utility model has the advantages that:

the utility model provides an electricity core rolling press device, this electricity core rolling press device include workstation, microscope carrier, rolling mechanism and first driving piece, lift up through first driving piece drive fixed plate, and the microscope carrier that bears the weight of electric core can remove to rolling mechanism's below, then first driving piece breaks away from the fixed plate for the fixed plate glides along the guide arm under the action of gravity, on the electric core of gyro wheel crimping below. Reciprocating in the X-axis direction through the carrying platform, namely, the roller and the battery cell generate relative motion, and the roller rolls the battery cell repeatedly to enable the surface of the battery cell to be flat; after the completion is to the roll extrusion of electric core, first driving piece redriven fixed plate lifts up so that rolling mechanism and electric core separation, and the microscope carrier area leaves electric core, is convenient for take out electric core and change electric core. Under the structure, the battery cell is rolled by the dead weight of the rolling mechanism, and the force applied to the battery cell is uniform and stable, so that the surface flatness of the rolled battery cell is better; simultaneously, at this in-process, the guide arm provides direction and supporting role for the fixed plate is shifting up and moving down the in-process stably, and the fixed plate is difficult for taking place to rock at the rolling in-process, is favorable to improving the roll extrusion stability and the plane degree by the electric core after the roll extrusion. And when rolling mechanism carries out the roll extrusion to electric core, first driving piece breaks away from rolling mechanism, has avoided causing the influence to rolling mechanism, has also avoided rolling mechanism to react and lead to the impaired not hard up etc. of the output of first driving piece in first driving piece, is favorable to improving roll extrusion stability, reliability and application of force precision.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a cell rolling device at a first viewing angle according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a cell rolling device at a second viewing angle according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a rolling mechanism provided in an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an X-direction driving assembly according to an embodiment of the present invention.

In the figure:

1. a work table; 2. a stage; 3. a rolling mechanism; 31. a guide bar; 32. a fixing plate; 320. avoiding holes; 33. a weight; 34. a roller; 35. a limiting plate; 351. a shoulder block; 36. a cushioning component; 361. a guide pin; 362. an elastic shoulder; 363. a baffle plate; 4. a first driving member; 41. a boss; 5. a limiting member; 6. a weight frame; 7. an X-direction driving component; 71. a second driving member; 72. a guide rail; 73. a slider; 74. a screw; 8. an auxiliary track; 9. an auxiliary slide block; 10. a pressure gauge; 11. a correlation sensor; 12. threading track.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplification of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Example one

As shown in fig. 1 to fig. 3, the present embodiment provides a cell rolling device, which includes a workbench 1, a carrier 2, a rolling mechanism 3, and a first driving member 4, where the carrier 2 is disposed on the workbench 1 in a reciprocating manner along an X-axis direction, and the carrier 2 is used for carrying a cell; the rolling mechanism 3 comprises a guide rod 31, a fixing plate 32, a weight 33 and a roller 34, wherein the guide rod 31 is arranged on the workbench 1 along the Z-axis direction, the fixing plate 32 is slidably arranged on the guide rod 31 in a penetrating manner, the weight 33 is arranged at the upper end of the fixing plate 32, and the roller 34 is axially arranged along the Y-axis direction and is rotatably connected to the lower end of the fixing plate 32; first driving piece 4 erects in the top of workstation 1, and the output of first driving piece 4 can drive connection fixed plate 32 and lift up with drive fixed plate 32, or breaks away from fixed plate 32 so that fixed plate 32 falls down under the action of gravity to make gyro wheel 34 crimping in the surface of electric core.

The cell rolling device provided by this embodiment drives the fixing plate 32 to lift up through the first driving part 4, the carrier 2 carrying the cell can move to the lower part of the rolling mechanism 3, and then the first driving part 4 is separated from the fixing plate 32, so that the fixing plate 32 slides down along the guide rod 31 under the action of gravity until the roller 34 is pressed on the cell below. The carrying platform 2 reciprocates in the X-axis direction, namely the roller 34 and the battery cell move relatively, and the roller 34 rolls the battery cell repeatedly to enable the surface of the battery cell to be flat; after the completion is to the roll extrusion of electric core, first driving piece 4 drives fixed plate 32 once more and lifts up so that rolling mechanism 3 separates with electric core, and microscope carrier 2 area leaves electric core, is convenient for take out electric core and change electric core. Under the structure, the battery cell is rolled by the dead weight of the rolling mechanism 3, so that the force applied to the battery cell is uniform and stable, and the surface flatness of the rolled battery cell is better; meanwhile, in the process, the guide rod 31 provides a guiding and supporting function for the fixing plate 32, so that the fixing plate 32 is stable in the upward and downward moving process, the fixing plate 32 is not prone to shaking in the rolling process, and the rolling stability and the flatness of the rolled battery cell are improved. And when rolling mechanism 3 rolled the electricity core, first driving piece 4 broke away from rolling mechanism 3, avoided causing the influence to rolling mechanism 3, also avoided rolling mechanism 3 counteraction to first driving piece 4 to lead to the impaired not hard up etc. of output of first driving piece 4, was favorable to improving roll extrusion stability, reliability and application of force precision.

Preferably, the roller 34 is provided in plurality, and the plurality of rollers 34 are arranged at intervals along the X-axis direction at the lower end of the fixing plate 32, so as to improve the working efficiency and the rolling effect.

Specifically, four guide rods 31 are arranged on the workbench 1, four corners of the fixing plate 32 are respectively sleeved on the four guide rods 31 in a sliding manner, and the stability of the fixing plate 32 in the sliding process and the rolling process of the roller 34 can be improved by arranging the four guide rods 31, so that the fixing plate 32 is not prone to deviation, and the use reliability of the rolling mechanism 3 is improved. Of course, in other embodiments, the number of the guide rods 31 may be set according to practical situations, for example, six or eight, and the like, and is not limited herein.

Preferably, each guide rod 31 is sleeved with a limiting member 5, and the limiting member 5 is located below the fixing plate 32 and used for limiting the lowest position of the fixing plate 32 on the guide rod 31. In this embodiment, the height of the limiting member 5 is lower than the height of the electric core on the carrier 2, and is higher than the height of the empty carrier 2. If the limiting member 5 is not provided, when the electric core is not carried on the carrier 2 but the fixing plate 32 is lowered by the first driving member 4, the fixing plate 32 slides down and presses the carrier 2 and other components on the carrier 2, which is easy to damage the carrier 2 and other components on the carrier 2. Through setting up locating part 5, when not bearing electric core but first driving piece 4 puts down fixed plate 32 on microscope carrier 2, fixed plate 32 gliding and butt in locating part 5, locating part 5 has avoided fixed plate 32 to cause the pressure loss to other parts on microscope carrier 2 and microscope carrier 2, has guaranteed this electric core rolling press device safety in utilization.

In this embodiment, the upper end of guide arm 31 is provided with the mounting panel, and first driving piece 4 is fixed on the mounting panel, and guide arm 31 and mounting panel provide the supporting role for first driving piece 4 promptly, have saved the installing support of mounting panel, can improve this electricity core rolling press device's compact structure degree.

Preferably, still be provided with manometer 10 on the mounting panel, manometer 10 and first driving piece 4 electric connection for drive power when detecting and showing first driving piece 4 and lifting fixed plate 32, so that the staff can learn the rolling force of rolling mechanism 3 to electric core directly perceived, and increase and decrease weight 33 according to this in order to adapt to different demands.

Specifically, as shown in fig. 3, a weight holder 6 is disposed at the upper end of the fixing plate 32, and a weight 33 is fixed to the weight holder 6. Through setting up weight frame 6 the installation and the fixing of weight frame 6 of being convenient for, improve the stability of roll extrusion process. Exemplarily, every weight frame 6 includes two dead levers, and two dead levers are followed X axle direction interval and are set up, and two dead levers are located to the weight 33 cover, and the length direction of weight 33 extends along X axle direction promptly for electric core when X axle direction reciprocating motion, it is even to be at the ascending atress of X axle direction, can guarantee the plane degree on electric core surface effectively.

Preferably, two weight holders 6 are provided, and the two weight holders 6 are spaced apart from each other in the Y-axis direction on the fixing plate 32. Because the axial of gyro wheel 34 sets up along the Y axle direction, two weight framves 6 also are provided with along the Y axle direction and do benefit to the atress homogeneity that improves gyro wheel 34 to improve the atress homogeneity of electric core. More preferably, the two weight frames 6 are symmetrically arranged, and the symmetric centers coincide with the symmetric center of the fixing plate 32, so that the stress uniformity of the roller 34 is further improved, and the surface flatness of the battery core after rolling is ensured.

Further, rolling mechanism 3 still includes the connecting piece, and the connecting piece setting is in the upper end of fixed plate 32, and the connecting piece includes two at least limiting plate 35 that relative interval set up, and the upper end of every limiting plate 35 is provided with fender shoulder 351 to the direction protrusion of another limiting plate 35, and the peripheral ring of the output of first driving piece 4 is equipped with boss 41, and boss 41 is located the below of keeping off shoulder 351 to can lift two fender shoulders 351 or loosen two fender shoulders 351 downwards along with the drive of first driving piece 4. The first driving member 4 may be, but is not limited to, a driving cylinder, and a boss 41 is annularly provided on a front end outer circumference of an output shaft of the driving cylinder.

Through setting up the fender shoulder 351 that sets up on two relative limiting plate 35 and the limiting plate 35, the output of first driving piece 4 can be blocked to two and keep off between shoulder 351 and the fixed plate 32, and through setting up boss 41 for when the output of first driving piece 4 upwards withdraws, boss 41 card is between two fender shoulders 351, thereby lifts the connecting piece, lifts fixed plate 32 promptly, makes gyro wheel 34 leave electric core surface. When the output end of the first driving piece 4 extends downwards, the two limiting pieces 5 move downwards along with the boss 41 until the roller 34 contacts the surface of the battery cell and presses the surface of the battery cell; the output end of the first driving member 4 continues to extend downwards, the boss 41 moves downwards and leaves the two retaining shoulders 351, that is, the boss 41 is separated from the connecting member, so that the fixing plate 32 is not pulled by the first driving member 4, and the pressure on the battery cell is stable. Under the structure, the connecting piece has a simple structure, the first driving piece 4 can be driven to be connected or separated from the connecting piece only by extending or retracting, and the operation is convenient.

Preferably, two limiting plates 35 symmetry sets up, and the symmetry axis coincides with the symmetry axis of fixed plate 32 for during 4 drive connection spare of first driving piece, fixed plate 32 atress is even, and is even to the application of force of electricity core when the roll extrusion, guarantees the surface plane degree after the roll extrusion of electricity core.

Preferably, the fixing plate 32 is provided with an avoiding hole 320, the avoiding hole 320 is opposite to the boss 41, and the boss 41 can penetrate through the avoiding hole 320. Through setting up dodging hole 320 for the extension length scope of the output of first driving piece 4 is great, is convenient for boss 41 to break away from the connecting piece completely, improves rolling mechanism 3's operational reliability.

In order to ensure that the process of lifting or lowering the fixing plate 32 is relatively stable, the rolling mechanism 3 further includes a shock absorption assembly 36, one shock absorption assembly 36 is disposed at the lower end of each blocking shoulder 351, each shock absorption assembly 36 includes a guide pin 361, an elastic member and a baffle 363, the upper end of the guide pin 361 is connected to the blocking shoulder 351, the lower end of the guide pin 361 is connected to the baffle 363, the elastic member is sleeved on the guide pin 361, two ends of the elastic member abut against the baffle 363 and the blocking shoulder 351 respectively, and the baffle 363 is located above the boss 41 and located on the moving path of the boss 41. Wherein, the elastic member may be, but not limited to, a compression spring.

When the first driving member 4 lifts the fixing plate 32 upward, the boss 41 first contacts the stop plate 363, and the stop shoulder 351 is forced upward by the elastic member, so that the connecting member, i.e., the fixing plate 32, is lifted upward. In the process, the stress process of the connecting piece is gentle, so that the lifting process of the fixing plate 32 is more stable, the collision between the boss 41 and the retaining shoulder 351 can be reduced, and the service life of the rolling mechanism 3 is prolonged. When first driving piece 4 puts down fixed plate 32 downwards, because the effect of elasticity shoulder 362 for the process that the connecting piece left boss 41 is comparatively gentle, avoids boss 41 to leave the in-process of connecting piece suddenly, and gyro wheel 34 application of force excessively causes electric core damage, improves this electric core rolling press's stability in use and reliability. Of course, in other embodiments, the cushioning assembly 36 may include other structures, such as resilient pads, etc.

Further, as shown in fig. 2 and 4, the cell rolling device further includes an X-direction driving assembly 7, the X-direction driving assembly 7 is disposed on the table 1, and the X-direction driving assembly 7 is connected to the stage 2 in a driving manner so as to drive the stage 2 to reciprocate along the X-axis direction. Drive microscope carrier 2 reciprocating motion to drive assembly 7 through X, realize the automation of electricity core roll extrusion, save the labour, improve work efficiency and effect.

Specifically, the X-direction driving assembly 7 includes a second driving member 71, a guide rail 72, and a slider 73, the guide rail 72 is disposed on the table 1 along the X-axis direction, the slider 73 is slidably connected to the guide rail 72 along the X-axis direction, the second driving member 71 is disposed on the table 1 and is drivingly connected to the slider 73, and the stage 2 is fixedly connected to the slider 73. The second driving piece 71 drives the sliding block 73 to reciprocate along the guide track 72, so that the cell reciprocates at the lower end of the roller 34 to roll. The guide rail 72 provides a guide and support function for the slider 73, so that the slider 73 moves smoothly, the slider 73 is prevented from shifting in the moving process, and the stability of the cell rolling process is improved.

More specifically, the X-direction driving assembly 7 further includes a screw 74, the screw 74 is disposed on the worktable 1 along the X-axis direction, the second driving member 71 is drivingly connected to the screw 74 to drive the screw 74 to rotate, and the slider 73 is sleeved on the screw 74 and is threadedly connected with the screw 74. The second driving member 71 drives the screw 74 to rotate, and the sliding block 73 moves along the length direction of the screw 74 because the sliding block 73 is limited in the guide track 72 and is in threaded connection with the screw 74. And the second driving piece 71 drives the screw 74 to rotate forwards or backwards, so that the sliding block 73 can move forwards or backwards along the screw 74, namely, the cell can reciprocate. Alternatively, the second drive 71 may be a servo motor.

Preferably, the workbench 1 is further provided with an auxiliary rail 8, the auxiliary rail 8 is parallel to the guide rail 72, the auxiliary rail 8 is slidably connected with an auxiliary slider 9, and the stage 2 is fixed on the slider 73 and the auxiliary slider 9. The auxiliary sliding block 9 provides a larger supporting area for the carrying platform 2, so that the bottom of the carrying platform 2 is uniformly stressed, and the movement stability and the bearing capacity of the carrying platform 2 are improved.

In this embodiment, set up electric core on microscope carrier 2 and place the station and press from both sides tight driving piece, electric core places in electric core and places the position, then the tight driving piece of drive clamp is tight electric core in order to fix electric core, guarantees the stability of electric core in the roll extrusion in-process. Preferably, being provided with correlation sensor 11 on microscope carrier 2, correlation sensor 11 is used for detecting whether electric core places in place, and when unevenness was placed to electric core, correlation sensor 11 detected electric core, and signals reminds the staff to adjust electric core.

Preferably, still be provided with threading track 12 on workstation 1, during threading track 12 was worn to locate with the pencil that electric core is connected, threading track 12 played the guard action to this pencil, avoided electric core in reciprocating motion in-process pencil to take place winding etc., guaranteed going on smoothly of electric core roll extrusion process.

Example two

The present embodiment provides a cell rolling device, which has substantially the same structure as that of the first embodiment, and is improved on the basis of the first embodiment. Therefore, only the difference between the two embodiments will be described, and the same structure as that of the embodiment will not be described herein again.

In this embodiment, the connecting piece includes supporting part and connecting portion, and the supporting part is the tube-shape, and connecting portion set up the upper end opening part at the supporting part, has seted up the connecting hole on the connecting portion, and the output of first driving piece 4 passes in the connecting hole stretches into the supporting part, and the cross-sectional area of boss 41 is less than the area of connecting hole. Under the above structure, when the output end of the first driving member 4 retracts upwards, the boss 41 moves upwards and is clamped at the connecting hole, the boss 41 lifts the connecting member, and thus the fixing plate 32 is lifted; when the output end of the first driving member 4 extends downward, the boss 41 moves downward and gradually moves away from the connection hole, and the fixing plate 32 presses the battery cell under the action of gravity.

Of course, in other embodiments, the connector may include other structures as long as the downward movement of the boss 41 out of the connector and the upward lifting of the connector are achieved.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (10)

1. The utility model provides a battery core rolling press device which characterized in that includes:

a table (1);

the carrying platform (2) is arranged on the workbench (1) in a reciprocating manner along the X-axis direction, and the carrying platform (2) is used for carrying the battery cell;

the rolling mechanism (3) comprises a guide rod (31), a fixing plate (32), weights (33) and rollers (34), the guide rod (31) is arranged on the workbench (1) along the Z-axis direction, the fixing plate (32) is slidably sleeved on the guide rod (31), the weights (33) are arranged at the upper end of the fixing plate (32), and the rollers (34) are axially arranged along the Y-axis direction and rotatably connected to the lower end of the fixing plate (32);

the first driving piece (4) is erected above the workbench (1), and the output end of the first driving piece (4) can be in driving connection with the fixing plate (32) to drive the fixing plate (32) to lift up or be separated from the fixing plate (32) to enable the fixing plate (32) to fall under the action of gravity, and the roller (34) is in pressure joint with the surface of the battery core.

2. The cell stitching device according to claim 1, wherein the stitching mechanism (3) further comprises:

the connecting piece is arranged at the upper end of the fixing plate (32) and comprises at least two limiting plates (35) which are arranged at intervals, a blocking shoulder (351) is arranged at the upper end of each limiting plate (35) in a protruding mode towards the other limiting plate (35), a boss (41) is arranged on the outer periphery of the output end of the first driving piece (4) in a surrounding mode, the boss (41) is located below the blocking shoulder (351), and the two blocking shoulders (351) can be lifted upwards or loosened downwards along with the driving of the first driving piece (4).

3. The battery core rolling device according to claim 2, wherein an avoiding hole (320) is formed in the fixing plate (32), the avoiding hole (320) is opposite to the boss (41), and the boss (41) can penetrate through the avoiding hole (320).

4. The cell stitching device according to claim 2, wherein the stitching mechanism (3) further comprises:

the shock absorption assembly (36) is arranged at the lower end of each blocking shoulder (351), the shock absorption assembly (36) comprises a guide pin (361), an elastic piece and a baffle plate (363), the upper end of the guide pin (361) is connected to the blocking shoulders (351), the lower end of the guide pin (361) is connected with the baffle plate (363), the elastic piece is sleeved on the guide pin (361), two ends of the elastic piece are respectively abutted to the baffle plate (363) and the blocking shoulders (351), and the baffle plate (363) is located above the boss (41) and located on a moving path of the boss (41).

5. The cell rolling device of claim 1, further comprising:

the limiting piece (5) is sleeved on the guide rod (31) and located below the fixing plate (32), and the limiting piece (5) is used for limiting the lowest position of the fixing plate (32) on the guide rod (31).

6. The cell rolling device of claim 1, further comprising:

the weight frame (6) is arranged on the fixing plate (32), and the weight (33) is fixed on the weight frame (6) in a penetrating mode.

7. The cell rolling device according to claim 6, characterized in that the weight holder (6) is provided with two, and the two weight holders (6) are arranged on the fixing plate (32) at intervals along the Y-axis.

8. The cell rolling press device according to any one of claims 1 to 7, further comprising:

the X-direction driving assembly (7) is arranged on the workbench (1), and the X-direction driving assembly (7) is connected to the carrying platform (2) in a driving mode so as to drive the carrying platform (2) to reciprocate along the X-axis direction.

9. The cell rolling device according to claim 8, wherein the X-direction driving assembly (7) includes a second driving member (71), a guide rail (72), and a slider (73), the guide rail (72) is disposed on the workbench (1) along the X-axis direction, the slider (73) is slidably connected to the guide rail (72) along the X-axis direction, the second driving member (71) is disposed on the workbench (1) and is drivingly connected to the slider (73), and the carrier (2) is fixedly connected to the slider (73).

10. The cell rolling device according to claim 9, wherein the X-direction driving assembly (7) further includes a screw rod (74), the screw rod (74) is disposed on the workbench (1) along the X-axis direction, the second driving member (71) is drivingly connected to the screw rod (74) to drive the screw rod (74) to rotate, and the slider (73) is sleeved on the screw rod (74) and is in threaded connection with the screw rod (74).

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