CN210430011U

CN210430011U - Novel lamination mechanism of lithium cell

Info

Publication number: CN210430011U
Application number: CN201921620077.3U
Authority: CN
Inventors: 朴星勳; 刘嘉兵
Original assignee: Liyang Jiatuo Intelligent Equipment Co ltd
Current assignee: Jiangsu Jiatuo New Energy Intelligent Equipment Co ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2020-04-28
Anticipated expiration: 2029-09-25

Abstract

The utility model discloses a novel lamination mechanism of a lithium battery, relating to the technical field of battery production equipment; the laminating machine comprises a bottom plate, a laminating table, a support frame, a first pressing claw device and a second pressing claw device, wherein the support frame is fixed on the upper surface of the bottom plate; the first claw pressing device comprises a servo motor, a ball screw, a first cam, a second cam, a third cam, a first claw pressing assembly, a second claw pressing assembly and a longitudinal transmission assembly, the longitudinal transmission assembly comprises a lifting sliding seat, an operating rod and a longitudinal sliding block, and the first claw pressing assembly comprises a transverse moving plate, a vertical follow-up plate and a mandrel; the utility model has the advantages that: the operation efficiency of the whole machine is improved, the lamination efficiency is improved, the motion consistency of the two pressing claws is ensured, and the defective rate is reduced.

Description

Novel lamination mechanism of lithium cell

Technical Field

The utility model relates to a battery manufacture equipment technical field, more specifically the utility model relates to a novel lamination mechanism of lithium cell.

Background

The lamination machine power battery is formed by sequentially laminating a negative plate, a diaphragm, a positive plate, a diaphragm and a negative plate … …, and the sequential lamination of the diaphragm and an electrode plate is the main manufacturing mode of the current power battery. After the electric core is shelled, the naked electric core diaphragm is Z style of calligraphy, and positive plate, negative pole piece are crisscross to overlap in order. In the lamination process, the positive plate, the negative plate and the diaphragm are alternately stacked upwards, and the four pressing plates are used for pressing the pole piece and the diaphragm when the pole piece is placed on the diaphragm and fixing the pole piece and the diaphragm without displacement. Therefore, each stacking of the positive electrode sheet or the negative electrode sheet, the four pressing sheets or one pair of the four pressing sheets will perform an arc pressing action for pressing and fixing the electrode sheet and the diaphragm which are just stacked on the uppermost layer.

A tabletting mechanism of a traditional lamination type power battery laminating machine adopts two cylinders to drive one tabletting. During lamination, the two cylinders drive one tablet to realize: drawing out, lifting up, advancing and pressing down. The efficiency of the whole machine is limited by the fact that the cylinder performs four actions, a process which takes 0.8 to 1 second, which is carried out once per lamination. In addition, when the pressing sheets press the pole piece and the diaphragm, the best condition is that the two opposite pressing sheets can act simultaneously to ensure the stress consistency of the pole piece and the diaphragm, but in the prior art, because each pressing sheet is driven by different cylinders, the power sources of the pressing sheets are different, in the process of controlling the cylinders, the simultaneous action of different cylinders is difficult to realize, the consistency of the two pressing sheets is difficult to ensure, the stress of the pole piece and the diaphragm is easy to be uneven, and defective products are caused.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of prior art, the utility model provides a novel lamination mechanism of lithium cell, this novel lamination mechanism of lithium cell drives two movements of pressing the claw simultaneously through a servo motor, has improved the function efficiency of complete machine, has improved lamination efficiency, has guaranteed two uniformity of pressing the claw motion simultaneously, has reduced the defective percentage.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a novel lamination mechanism of lithium cell, its improvement part lies in: the laminating machine comprises a bottom plate, a laminating table, a support frame, a first pressing claw device and a second pressing claw device, wherein the support frame is fixed on the upper surface of the bottom plate;

the first claw pressing device comprises a servo motor, a ball screw, a first cam, a second cam, a third cam, a first claw pressing assembly, a second claw pressing assembly and a longitudinal transmission assembly, wherein the ball screw is connected with a motor shaft of the servo motor, the first cam and the second cam are slidably mounted on the ball screw, the first cam and the second cam slide along the radial direction of the ball screw, and the third cam is fixedly mounted on the ball screw and is positioned between the first cam and the second cam;

the longitudinal transmission assembly comprises a lifting sliding seat, an operating rod and a longitudinal sliding block, the lifting sliding seat is slidably mounted on the support frame along the vertical direction, two first sliding chutes which are bilaterally symmetrical are arranged on the lifting sliding seat, and the first sliding chutes are arranged along the horizontal direction; longitudinal sliding blocks are symmetrically arranged on the left side and the right side of the lifting sliding seat, the longitudinal sliding blocks are slidably arranged on the supporting frame along the horizontal direction, and second sliding grooves are formed in the longitudinal sliding blocks along the vertical direction; the operating rod is V-shaped, the central point of the operating rod is rotatably arranged on the support frame, one end of the operating rod is clamped in the first sliding groove, and the other end of the operating rod is clamped in the second sliding groove; the lifting sliding seat is also provided with a sliding seat follower wheel which is tightly attached to the revolution surface of the third cam;

the first pressing claw assembly and the second pressing claw assembly are identical in structure, the first pressing claw assembly comprises a transverse moving plate, a vertical follow-up plate and a mandrel, the transverse moving plate is fixed on the side edge of the longitudinal sliding block, a first follow-up wheel is installed at the bottom of the transverse moving plate, the vertical follow-up plate is installed on the transverse moving plate in a sliding mode along the vertical direction, a second follow-up wheel is installed at the bottom of the vertical follow-up plate, and the mandrel is fixed at the top of the vertical follow-up plate along the horizontal direction;

the first cam and the second cam are both provided with annular limiting grooves, a first follower wheel in the first pressing claw assembly is clamped in the limiting groove of the first cam, and a first follower wheel in the second pressing claw assembly is clamped in the limiting groove of the second cam; and the first cam and the second cam are respectively provided with a revolution surface with one end protruding outwards, a second follower wheel in the first pressing claw assembly is clung to the revolution surface of the first cam, and a second follower wheel in the second pressing claw assembly is clung to the revolution surface of the second cam.

In the structure, a first vertical slide rail is arranged on the support frame along the vertical direction, and the lifting sliding seat is slidably mounted on the first vertical slide rail; the support frame is also fixedly provided with a limiting fixed block, and an expansion spring is arranged between the lifting sliding seat and the limiting fixed block.

In the structure, the transverse moving plate is provided with a second vertical slide rail along the vertical direction, and the vertical follow-up plate is slidably mounted on the second vertical slide rail.

In the structure, the first pressing claw assembly further comprises a pressing claw fixing plate, the pressing claw fixing plate is in a horizontal state, one end of the pressing claw fixing plate is fixedly connected with the top end of the vertical follow-up plate, and the other end of the pressing claw fixing plate is connected with the mandrel.

In the structure, the novel lamination mechanism for the lithium battery further comprises a lifting driving device, the lifting driving device is fixed on the bottom plate, the lamination table is fixed above the lifting driving device, and the lifting driving device is used for driving the lamination table to reciprocate in the vertical direction.

In the structure, the lifting driving device comprises a lifting servo motor, a lifting screw rod, a lifting nut, a linear bearing and a guide rod;

the lifting servo motor is fixed below the bottom plate, one end of the lifting screw rod is connected with a motor shaft of the lifting servo motor, and the lifting screw nut is in threaded connection with the lifting screw rod; the linear bearing is installed on the support frame, the guide rod penetrates through the linear bearing, the top end of the guide rod is fixed below the laminating table, and the guide rod is fixedly connected with the lifting screw.

In the structure, one end of the ball screw is fixedly provided with the induction sheet, and the bottom plate is provided with the inductor corresponding to the induction sheet.

The utility model has the advantages that: before the lamination operation, the positions of the first cam, the second cam and the third cam are adjusted, and the rotating speed of the servo motor is adjusted to enable the servo motor to operate at a proper rotating speed; and moreover, two pressing claws on the same side are driven to move by one servo motor, so that the operation efficiency of the whole machine is improved, and the lamination efficiency is improved.

Drawings

Fig. 1 is the utility model discloses a novel lamination mechanism's of lithium cell positive structural schematic diagram.

Fig. 2 is the utility model discloses a novel lamination mechanism's of lithium cell axonometric drawing.

Fig. 3 is the utility model discloses a novel lamination mechanism's of lithium cell side structure schematic diagram.

Fig. 4 is a schematic cross-sectional view taken along line a-a in fig. 3.

Fig. 5 is a schematic diagram of the movement of the lateral and vertical strokes of the mandrel.

FIG. 6 is a graph of mandrel movement time versus vertical displacement.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. In addition, all the connection/connection relations referred to in the patent do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection auxiliary components according to specific implementation conditions. The utility model discloses each technical feature in the creation can the interactive combination under the prerequisite that does not contradict conflict each other.

Referring to fig. 1 and 2, the utility model discloses a novel lamination mechanism of lithium battery, realize piling up of pole piece and diaphragm through this mechanism, it is concrete, novel lamination mechanism of lithium battery include bottom plate 201, lamination platform 202, support frame 203, first pressure claw device 204 and second pressure claw device 205, support frame 203 be fixed in bottom plate 201 upper surface, lamination platform 202 set up in the top of support frame 203, first pressure claw device 204 and second pressure claw device 205 set up side by side on bottom plate 201 to be located the both sides of support frame 203 respectively, the structure of first pressure claw device 204 is the same with the structure of second pressure claw device 205, through the cooperation of first pressure claw device 204 and second pressure claw device 205, realizes the lamination action of pole piece and diaphragm on lamination platform 202, its specific working process will be further explained below.

As shown in fig. 2, the first claw pressing device 204 includes a servo motor 2041, a ball screw 2042, a first cam 2043, a second cam 2044, a third cam 2045, a first claw pressing component 206, a second claw pressing component 207, and a longitudinal transmission component 208, the ball screw 2042 is connected to a motor shaft of the servo motor 2041, the servo motor 2041 is fixed to one side of the bottom plate 201, the base is further provided with a plurality of ball seat bodies, the ball screw 2042 is rotatably mounted on the ball seat bodies, and the ball screw 2042 is driven by the servo motor 2041 to rotate. The first cam 2043 and the second cam 2044 are slidably mounted on the ball screw 2042, the first cam 2043 and the second cam 2044 slide along the radial direction of the ball screw 2042, and the third cam 2045 is fixedly mounted on the ball screw 2042 and located between the first cam 2043 and the second cam 2044; when the ball screw 2042 rotates, the first cam 2043, the second cam 2044 and the third cam 2045 can be driven to rotate, meanwhile, the first cam 2043 and the second cam 2044 limit the degree of freedom in the axial direction of the ball screw 2042, and the first cam 2043 and the second cam 2044 can slide in the radial direction of the ball screw 2042, so that the first cam 2043 and the second cam 2044 can slide on the ball screw 2042 while rotating. In this embodiment, the first cam 2043 and the second cam 2044 have the same structure, and taking the first cam 2043 as an example, the first cam 2043 is provided with an annular limiting groove 2046, and a rotating surface 2047 protruding outward is further provided beside the limiting groove 2046. It should be noted that the ball screw 2042 may be replaced by a linear bearing, and in the practical application process, the linear bearing may be selected according to requirements.

As shown in fig. 1 and fig. 2, for the longitudinal transmission assembly 208, the present invention provides a specific embodiment, the longitudinal transmission assembly 208 includes a lifting sliding seat 2081, an operation rod 2082 and a longitudinal sliding block 2083, the lifting sliding seat 2081 is slidably mounted on the support frame 203 along the vertical direction, in this embodiment, a first vertical slide rail is disposed on the support frame 203 along the vertical direction, and the lifting sliding seat 2081 is slidably mounted on the first vertical slide rail; a limiting fixing block 2084 is further fixedly mounted on the support frame 203, and a telescopic spring 2085 is further arranged between the lifting sliding seat 2081 and the limiting fixing block 2084. Further, two first sliding chutes which are bilaterally symmetrical are arranged on the lifting sliding seat 2081, and the first sliding chutes are arranged along the horizontal direction; the left and right sides symmetry of lift sliding seat 2081 is provided with longitudinal sliding block 2083, and longitudinal sliding block 2083 along horizontal direction slidable mounting on support frame 203, in this embodiment, is fixed with translation guide rail 2086 on the support frame 203, longitudinal sliding block 2083 slidable mounting on translation guide rail 2086, be provided with the second spout along vertical direction on longitudinal sliding block 2083. As shown in fig. 2, the operation rod 2082 is "V" shaped, the center point of the operation rod 2082 is rotatably installed on the support frame 203, one end of the operation rod 2082 is clamped in the first sliding groove, the other end of the operation rod 2082 is clamped in the second sliding groove, therefore, when the lifting sliding seat 2081 performs lifting movement on the support frame 203, one end of the operation rod 2082 slides in the first sliding groove, the operation rod 2082 is driven to rotate along the center point thereof, the other end of the operation rod 2082 slides in the second sliding groove of the longitudinal sliding block 2083, and the longitudinal sliding block 2083 is driven to translate along the translation guide rail 2086. In addition, the lifting sliding seat 2081 is further provided with a sliding seat follower wheel 2087, the sliding seat follower wheel 2087 is tightly attached to the revolution surface of the third cam 2045, and when the ball screw 2042 drives the third cam 2045 to rotate, the third cam 2045 is matched with the sliding seat follower wheel 2087 through the revolution surface to drive the lifting sliding seat 2081 to ascend, descend or stop in the vertical direction.

As shown in fig. 2, the first pressure claw assembly 206 and the second pressure claw assembly 207 have the same structure, in this embodiment, the structure of the first pressure claw assembly 206 is taken as an example for detailed description, the first pressure claw assembly 206 includes a traverse plate 2061, a vertical follower plate 2062 and a mandrel 2063, the traverse plate 2061 is fixed on the side of the longitudinal slide block 2083 and is driven by the longitudinal slide block 2083 to reciprocate in the horizontal direction, a first follower wheel 2064 is installed at the bottom of the traverse plate 2061, the first follower wheel 2064 in the first pressure claw assembly 206 is clamped in the limit groove 2046 of the first cam 2043, similarly, the first follower wheel 2064 in the second pressure claw assembly 207 is clamped in the limit groove 2046 of the second cam 2044, when the traverse plate 2061 is translated in the horizontal direction, the first cam 2043 is driven to translate on the ball screw 2042 by the cooperation of the limit groove 2046 and the first follower wheel 2064, and the same principle, causing the second cam 2044 to translate on the ball screw 2042. Further, the vertical follow-up plate 2062 is slidably mounted on the traverse plate 2061 along the vertical direction, in this embodiment, a second vertical slide rail is disposed on the traverse plate 2061 along the vertical direction, and the vertical follow-up plate 2062 is slidably mounted on the second vertical slide rail; a second follower wheel 2065 is mounted at the bottom of the vertical follower plate 2062, the spindle 2063 is fixed at the top of the vertical follower plate 2062 along the horizontal direction, the second follower wheel 2065 of the first pressure jaw assembly 206 is tightly attached to the revolution surface of the first cam 2043, and the second follower wheel 2065 of the second pressure jaw assembly 207 is tightly attached to the revolution surface of the second cam 2044. With this structure, when the first cam 2043 rotates, the second follower wheel 2065 and the vertical follower plate 2062 are driven to reciprocate in the vertical direction by the revolution surface of the first cam 2043, so as to drive the spindle 2063 of the first clamping jaw assembly 206 to move in the vertical direction; similarly, rotation of the second cam 2044 causes the spindle 2063 of the second clamping jaw assembly 207 to move in the vertical direction. Since the second pressure claw device 205 has the same structure as the first pressure claw device 204, detailed description thereof is omitted in this embodiment. Thus, the movement of the mandrels 2063, consisting of a reciprocating movement in the horizontal direction and a reciprocating movement in the vertical direction, effects the operation of the lamination on the lamination station 202 by the cooperation of the movements of the four mandrels 2063.

In addition, in the above embodiment, the first clamping jaw assembly 206 further includes a clamping jaw fixing plate 2066, the clamping jaw fixing plate 2066 is in a horizontal state, one end of the clamping jaw fixing plate 2066 is fixedly connected to the top end of the vertical follow-up plate 2062, and the other end of the clamping jaw fixing plate 2066 is connected to the mandrel 2063.

As shown in fig. 3 and 4, the novel lithium battery lamination mechanism further includes a lifting driving device 209, the lifting driving device 209 is fixed on the bottom plate 201, the lamination table 202 is fixed above the lifting driving device 209, and the lifting driving device 209 is used for driving the lamination table 202 to reciprocate in the vertical direction. As for the lifting driving device 209, the present invention provides a specific embodiment, as shown in fig. 4, the lifting driving device 209 includes a lifting servo motor 2091, a lifting lead screw 2092, a lifting nut 2093, a linear bearing 2094 and a guide rod 2095; the lifting servo motor 2091 is fixed below the bottom plate 201, one end of a lifting screw rod 2092 is connected with a motor shaft of the lifting servo motor 2091, and the lifting screw nut 2093 is in threaded connection with the lifting screw rod 2092; the linear bearing 2094 is installed on the support frame 203, the guide rod 2095 passes through the linear bearing 2094, the top end of the guide rod 2095 is fixed below the lamination table 202, the guide rod 2095 is fixedly connected with the lifting screw nut 2093, and when the lifting servo motor 2091 drives the lifting screw rod 2092 to rotate, the lifting screw nut 2093 is driven to reciprocate on the lifting screw rod 2092, so that the guide rod 2095 is driven to reciprocate in the vertical direction, and the lifting movement of the lamination table 202 is realized. In addition, an induction piece 2096 is fixedly installed at one end of the ball screw 2042, and an inductor 2097 is installed at a position of the bottom plate 201 corresponding to the induction piece 2096.

Through the structure, we are going on the detailed explanation to the utility model discloses a novel lamination mechanism's of lithium cell working process, after servo motor 2041 drove ball screw 2042 rotatory, under the drive of vertical transmission subassembly 208, dabber 2063 can realize the displacement in the horizontal direction, simultaneously, through the cooperation of first cam 2043 and first pressure claw subassembly 206, through the cooperation of second cam 2044 and second pressure claw subassembly 207, can drive two relative dabbers 2063 and realize the position in vertical direction. As shown in fig. 5, which is a schematic diagram of the movement of the lateral stroke and the vertical stroke of the spindle 2063, fig. 6 is a diagram of the relationship between the movement time and the vertical displacement of the spindle 2063, and taking one spindle 2063 as an example, the movement of the spindle 2063 is described, the movement of the spindle 2063 is a rectangular movement, between the station 1 and the station 2, the positions of the first cam 2043 and the second follower wheel 2065 are kept unchanged, and the third cam 2045 drives the sliding seat follower wheel 2087 to move downward (at this time, the lifting sliding seat 2081 receives the tension of the expansion spring 2085), so as to drive the spindle 2063 to move toward the center of the lamination station 202; between the working positions 2 and 3, the relative positions of the third cam 2045 and the sliding seat follow-up wheel 2087 are kept unchanged, and the revolution surface of the first cam 2043 is matched with the second follow-up wheel 2065 to drive the second follow-up wheel 2065 to move upwards, so that the mandrel 2063 also moves upwards; between the work 3 and the work station 4, the first cam 2043 and the second follower wheel 2065 keep the relative positions, and the third cam 2045 drives the sliding seat follower wheel 2087 to move upwards, so that the mandrel 2063 moves away from the center of the lamination table 202 through a series of transmissions; between station 4 and station 1, the second follower wheel 2065 moves downward with the cam, so that the spindle 2063 moves downward, and the relative positions of the third cam 2045 and the sliding seat follower wheel 2087 are kept unchanged.

Before the lamination operation, the positions of the first cam 2043, the second cam 2044 and the third cam 2045 are adjusted, and the rotating speed of the servo motor 2041 is adjusted to enable the servo motor 2041 to operate at a proper rotating speed, so that the servo motor 2041 can operate without stopping during the lamination operation process and can operate continuously according to the operating process; moreover, two pressing claws on the same side are driven to move by one servo motor 2041, so that the operation efficiency of the whole machine is improved, and the lamination efficiency is improved.

The utility model discloses a novel lamination mechanism for lithium battery, the first pressing claw device 204 and the second pressing claw device 205 are respectively arranged at both sides of the supporting frame 203, in the first pressing claw device 204 and the second pressing claw device 205, the two directions of movement of the two mandrels 2063 are respectively controlled by a servo motor 2041, compared with the control mode of a plurality of cylinders or motors in the prior art, on one hand, the structure of power driving is simplified, on the other hand, because the two mandrels 2063 are driven by the same motor, the problem of asynchronization caused by the control of a plurality of motors in the prior art is avoided, when the lamination of the pole piece and the diaphragm is carried out, the two mandrels 2063 positioned at the same side can move simultaneously, the consistency of movement is ensured, thereby the condition that the pole piece or the diaphragm has wrinkles due to the inconsistency of movement of the two mandrels 2063 can be avoided, the quality of the lamination is improved, and the defective rate of the formed battery cell is reduced.

While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.

Claims

1. The utility model provides a novel lamination mechanism of lithium cell which characterized in that: the laminating machine comprises a bottom plate, a laminating table, a support frame, a first pressing claw device and a second pressing claw device, wherein the support frame is fixed on the upper surface of the bottom plate;

2. The novel lamination mechanism of lithium battery as claimed in claim 1, wherein: a first vertical sliding rail is arranged on the supporting frame along the vertical direction, and the lifting sliding seat is slidably mounted on the first vertical sliding rail; the support frame is also fixedly provided with a limiting fixed block, and an expansion spring is arranged between the lifting sliding seat and the limiting fixed block.

3. The novel lamination mechanism of lithium battery as claimed in claim 1, wherein: and a second vertical slide rail is arranged on the transverse moving plate along the vertical direction, and the vertical follow-up plate is slidably arranged on the second vertical slide rail.

4. The novel lamination mechanism of lithium battery as claimed in claim 1, wherein: the first pressure claw assembly further comprises a pressure claw fixing plate, the pressure claw fixing plate is in a horizontal state, one end of the pressure claw fixing plate is fixedly connected with the top end of the vertical follow-up plate, and the other end of the pressure claw fixing plate is connected with the mandrel.

5. The novel lamination mechanism of lithium battery as claimed in claim 1, wherein: the novel lithium battery lamination mechanism further comprises a lifting driving device, the lifting driving device is fixed on the bottom plate, the lamination table is fixed above the lifting driving device, and the lifting driving device is used for driving the lamination table to reciprocate in the vertical direction.

6. The novel lamination mechanism of lithium battery as claimed in claim 5, wherein: the lifting driving device comprises a lifting servo motor, a lifting screw rod, a lifting nut, a linear bearing and a guide rod;

7. The novel lamination mechanism of lithium battery as claimed in claim 1, wherein: one end of the ball screw is fixedly provided with an induction sheet, and the bottom plate is provided with an inductor corresponding to the induction sheet.