CN209993676U - Device for eliminating defective pole piece - Google Patents

Abstract

The embodiment of the utility model provides a device of rejecting defect pole piece relates to battery production technology field. The device for removing the defective pole pieces comprises a detection device, a stacking platform assembly, a swinging roller assembly, a waste removing platform and a cutting assembly, wherein the detection device is used for detecting whether pole pieces stacked on the stacking platform assembly in a pole piece belt are defective pole pieces or not, and the swinging roller assembly is used for driving the pole piece belt to move back and forth above the stacking platform assembly and the waste removing platform; the cutting assembly is used for cutting off the defective pole piece; simple structure, it is convenient to control, and the efficiency of rejecting the defect pole piece is high, improves the utilization ratio of pole piece material.

Description

Device for eliminating defective pole piece

Technical Field

The utility model relates to a battery production technology technical field particularly, relates to a device of rejecting defect pole piece.

Background

The manufacturing method of the lithium ion battery mainly comprises a winding type and a lamination type. Defects such as air holes, foreign body shrinkage holes, exposed foils, uneven coating thickness and the like can be generated during the pole piece in the early production process, and potential safety hazards exist in the performance of the battery due to the defective pole piece.

The conventional defective pole piece is detected after lamination is finished, whether a battery cell contains the defective pole piece is detected, and if the battery cell contains the defective pole piece, the whole battery cell is discarded.

The occurrence of defective pole pieces is incidental to the manufacturing process. The whole battery core is discarded, so that the pole piece without the defect is discarded as the defective pole piece, the pole piece material is seriously wasted, and the utilization rate of the pole piece material is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an reject device of defective pole piece is applicable to and adopts Z shape lamination technology, can reject defect pole piece wherein when Z shape lamination, reduces the waste of pole piece material, has improved the utilization ratio of pole piece material greatly.

The utility model discloses improve its technical problem and realize with following technical scheme.

The utility model provides a pair of reject device of defective pole piece for in the Z shape lamination technology, include: detection device, pile up a subassembly, swing roller subassembly, inspection rejects platform and excision subassembly.

The detection device is arranged close to the stacking assembly and used for detecting whether a pole piece section stacked on the uppermost layer of the stacking assembly in the pole piece belt is a defective pole piece or not; the stacking platform assembly is arranged adjacent to the waste removing platform, and the swinging roller assembly is arranged above the stacking platform assembly and can move back and forth above the stacking platform assembly and the waste removing platform; the cutting assembly is arranged between the stacking platform assembly and the waste removing platform and used for cutting the defective pole piece.

Furthermore, a first presser foot is arranged on the stacking platform assembly and used for fixing the pole segments.

Further, the stacking device further comprises a first power part, wherein the first power part is connected with the first pressure foot and drives the first pressure foot to move away from or close to the stacking assembly.

Furthermore, a second presser foot is arranged on the waste rejecting platform and used for fixing the pole piece.

Further, the folding table further comprises a second power piece, wherein the second power piece is connected with the second pressure foot and drives the second pressure foot to move away from or close to the folding table assembly.

The picking assembly is arranged close to the waste removing platform and used for removing the defective pole piece on the waste removing platform.

Further, the picking assembly comprises a clamping arm and a clamping hand arranged on the clamping arm, and the clamping hand is used for clamping the defective pole piece and moving out the defective pole piece.

Further, the clamping hand comprises a first clamping jaw and a second clamping jaw which are oppositely arranged, and a clamping space for clamping the defect pole piece is formed between the first clamping jaw and the second clamping jaw; the first clamping jaw and the second clamping jaw can move close to or away from each other so as to clamp or release the defect pole piece.

The picking assembly is used for moving the defective pole pieces on the waste removing platform out of the waste bin.

Further, the oscillating roller assembly includes a first moving roller disposed above a second moving roller that is closer to the deck assembly than the first moving roller.

The utility model provides a reject device of defective pole piece has the following beneficial effect of several aspects:

the utility model provides a reject device of defective pole piece, including detection device, fold platform subassembly, swing roller subassembly, inspection rejects platform and excision subassembly, detection device is used for detecting whether the pole piece area of stacking contains the defective pole piece. The swing roller assembly is arranged above the stacking platform assembly and can move back and forth above the stacking platform assembly and the waste rejecting platform; the cutting assembly is arranged between the stacking platform assembly and the waste removing platform and used for cutting off the defective pole piece. The device for eliminating the defective pole pieces is simple in structure, convenient to operate and control, high in efficiency of eliminating the defective pole pieces, capable of timely detecting the defective pole pieces in the lamination process and immediately removing the defective pole pieces, and capable of ensuring that the battery cell after lamination is finished does not contain the defective pole pieces and improving the quality of the battery cell. The defect pole piece can be prevented from flowing into the next process, and the production efficiency is improved; the whole battery core can be avoided to be abandoned, and the pole pieces without defects are taken as the defective pole pieces to be removed together. The waste of pole piece materials is reduced, and the utilization rate of the pole piece materials is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of an application scenario of a Z-shaped lamination process according to an embodiment of the present invention;

fig. 2 is a schematic view of an application scenario of the apparatus for eliminating a defective pole piece according to an embodiment of the present invention;

fig. 3 is a schematic view of an application scenario of a stacking assembly and a waste removing platform of the device for removing a defective pole piece according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a pickup assembly of the apparatus for eliminating a defective pole piece according to an embodiment of the present invention;

fig. 5 is a schematic view of an application scenario of the device for eliminating a defective pole piece according to the embodiment of the present invention in the first state;

fig. 6 is a schematic view of an application scenario of the device for eliminating a defective pole piece according to the embodiment of the present invention in the second state;

fig. 7 is a schematic view of an application scenario of the device for eliminating a defective pole piece according to the embodiment of the present invention in the third state;

fig. 8 is a schematic view of an application scenario of the device for eliminating a defective pole piece according to the embodiment of the present invention in the fourth state;

FIG. 9 is an enlarged view of a portion of FIG. 8 at H;

fig. 10 is a schematic view of an application scenario of the device for eliminating a defective pole piece according to the embodiment of the present invention after cutting off the defective pole piece.

Icon: 100-pole piece tape; a 101-pole segment; 10-positive plate; 20-negative plate; 30-a membrane; 103-defective pole pieces; 105-a first pole piece; 107-a second pole piece; 110-a platen assembly; 115-a first presser foot; 120-waste removing platform; 125-a second presser foot; 130-an oscillating roller assembly; 131-a first moving roller; 133-a second moving roller; 140-a resection component; 150-a pick-up assembly; 151-a gripper arm; 153-gripper hands; 154-a first jaw; 155-a second jaw; 160-waste bin; 171-a first transfer roller; 173-second transfer roll.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "upper" and "lower" are used as the terms of the orientation or the positional relationship based on the drawings, or the orientation or the positional relationship that the product of the present invention is usually placed when using, or the orientation or the positional relationship that the person skilled in the art usually understands, only for the convenience of describing the present invention and simplifying the description, but not for the indication or the suggestion that the device or the element that is referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be interpreted as the limitation of the present invention.

The terms "first", "second", and the like in the present invention are used only for descriptive distinction and have no special meanings.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "mounted" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. 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 production process of the lithium ion battery, defects such as air holes, foreign body shrinkage cavities, exposed foils, uneven coating thickness and the like can be generated on a pole piece in the early production process, and potential safety hazards exist in the performance of the battery due to the defective pole piece. If the defective pole pieces are not removed in time, the defective pole pieces flow into the next procedure, and detection difficulty and potential hidden danger are brought to the subsequent process.

Based on the defects in the prior art, the device for eliminating the defective pole pieces is suitable for the Z-shaped lamination process, the defective pole pieces are eliminated in time when lamination is carried out, the fact that the battery cell after lamination is finished does not contain the defective pole pieces is guaranteed, and the quality of the battery cell is improved. The defect pole piece can be prevented from flowing into the next process, and the production efficiency is improved; the whole battery core can be avoided to be abandoned, and the pole pieces without defects are taken as the defective pole pieces to be removed together. The device for eliminating the defective pole pieces reserves normal pole pieces as much as possible, namely, the device does not contain the defective pole pieces, reduces the waste of pole piece materials, and greatly improves the utilization rate of the pole piece materials.

Fig. 1 is a schematic view of an application scenario of a Z-shaped lamination process according to an embodiment of the present invention, please refer to fig. 1.

The utility model provides a pair of reject defective pole piece 103's device is applicable to in the Z shape lamination technology. The Z-lamination process in this embodiment is a method of folding the pole piece tape 100 by moving the pole piece tape in a zigzag manner on the lamination table assembly 110. The pole piece strip 100 comprises a plurality of continuous pole piece sections 101, each pole piece section 101 comprises a positive pole piece 10, a negative pole piece 20 and a diaphragm 30, and the positive pole piece 10 and the negative pole piece 20 are respectively attached to two sides of the diaphragm 30. For the electrode sheet strip 100, the separator 30 in one electrode sheet strip 100 is continuous, the positive electrode sheets 10 are arranged on one side of the separator 30, and the positive electrode sheets 10 are arranged at intervals; the negative electrode tabs 20 are disposed on the other side of the separator 30, and a plurality of negative electrode tabs 20 are disposed at intervals, and each positive electrode tab 10 is disposed opposite to one negative electrode tab 20. It is easily understood that the positive electrode sheet 10 and the negative electrode sheet 20 may be compositely molded on the separator 30 by, but not limited to, heating, pressing, or rolling.

Fig. 2 is a schematic view of an application scenario of the device for removing a defective pole piece 103 according to an embodiment of the present invention, please refer to fig. 2. Fig. 2 and subsequent figures only show the structure of the tab strip 100, and do not show the positive electrode tab 10 and the negative electrode tab 20 on the separator 30. The open arrows in the figure indicate one direction of movement of the elements.

When the Z-shaped lamination is performed, the pole piece belt 100 is conveyed by the first conveying roller 171 to reach the upper part of the lamination table assembly 110, and then the swing roller assembly 130 drives the pole piece belt 100 to move back and forth transversely, so that the pole piece belt 100 is folded in a Z shape and laid on the upper part of the lamination table assembly 110. It will be readily appreciated that each traverse of the oscillating roller assembly 130 is repeated by laying one pole segment 101, i.e. one positive pole piece 10 and one negative pole piece 20, and by laying a second pole segment 101, again traversing. If the pole piece strip 100 contains a defective pole piece 103, the first non-stacked pole segment 101 connected to the defective pole piece 103, i.e. the first pole segment 101 after the defective pole piece 103, is referred to as a first pole piece 105, and the first pole segment 101 connected to the first pole piece 105 and after the defective pole piece is referred to as a second pole piece 107.

The defective pole piece 103 is identified as follows: in one pole segment 101, if at least one of the positive pole piece 10, the negative pole piece 20 and the diaphragm 30 is defective, the pole segment is determined as a defective pole piece 103; otherwise, the pole piece is determined to be a normal pole piece. Pole pieces that do not have defects in the pole segment 101 are referred to as normal pole pieces, and only normal pole pieces can continue to be laminated on the lamination stage assembly 110. For example, the positive plate 10 is defective, the separator 30 and the negative plate 20 are not defective, and the pole piece segment 101 is determined as the defective pole piece 103 and needs to be cut off; the negative pole piece 20 is defective, the diaphragm 30 and the positive pole piece 10 are not defective, and the pole piece section 101 is determined as a defective pole piece 103 and needs to be cut off; the positive plate 10 and the negative plate 20 have defects, the diaphragm 30 has no defects, and the pole piece section 101 is determined as a defective pole piece 103 and needs to be cut off; the positive plate 10 and the diaphragm 30 have defects, the negative plate 20 has no defects, and the pole piece section 101 is determined as a defective pole piece 103 and needs to be cut off; the negative pole piece 20 and the diaphragm 30 have defects, the positive pole piece 10 has no defects, and the pole piece section 101 is determined as a defective pole piece 103 and needs to be cut off; the diaphragm 30 is defective, the positive plate 10 and the negative plate 20 are not defective, and the pole piece section 101 is determined as a defective pole piece 103 and needs to be cut off; the positive electrode sheet 10, the separator 30 and the negative electrode sheet 20 are all defective, and the pole piece segment 101 is identified as a defective pole piece 103 and needs to be cut off.

Referring to fig. 2, the apparatus for rejecting the defective pole piece 103 according to the present embodiment includes a detection device (not shown), a first conveying roller 171, a stacking table assembly 110, a swing roller assembly 130, a rejecting platform 120, a cutting assembly 140, a picking assembly 150, and a waste bin 160. The pole piece belt 100 is conveyed by the first conveying roller 171 into above the lamination station assembly 110. The detection device is used for detecting the pole piece section 101 which is being stacked on the uppermost layer of the stacking platform assembly 110, and judging whether the pole piece section 101 is a defective pole piece 103. Alternatively, the detection device may be an industrial camera or other sensor, and may be disposed above, laterally below, or on any side of the lamination stage assembly 110, and the like, and is not particularly limited herein.

The oscillating roller assembly 130 is disposed above the stacking table assembly 110 between the stacking table assembly 110 and the first transfer roller 171 and can move back and forth above the stacking table assembly 110 and the reject platform 120. In this embodiment, the oscillating roller assembly 130 includes a first moving roller 131 and a second moving roller 133, the first moving roller 131 is disposed above the second moving roller 133, and the second moving roller 133 is closer to the platen assembly 110 than the first moving roller 131. Optionally, a second conveying roller 173 is further disposed between the first moving roller 131 and the first conveying roller 171, the pole piece strip 100 passes between the two second conveying rollers 173 after passing through the first conveying roller 171, the two second conveying rollers 173 press the pole piece strip 100 against each other, so that the surface of the pole piece strip 100 is kept flat, and the two second conveying rollers 173 perform a leveling function.

The first moving roller 131 is connected to a first driving member (not shown) for driving the first moving roller 131 to move; the second moving roller 133 is connected to a second driving member (not shown) for driving the second moving roller 133 to move. The first and second drives may be motors or cylinders. Of course, the first moving roller 131 and the second moving roller 133 may move independently from each other or may be linked, that is, the first moving roller 131 and the second moving roller 133 are driven by the same driving member, and this is not limited in particular.

In this embodiment, the waste removing platform 120 is disposed at the left side of the stacking platform assembly 110, when it is detected that the pole piece segment 101 being stacked is the defective pole piece 103, the waste removing platform 120 moves up to a position flush with the uppermost pole piece of the stacking platform assembly 110, the first moving roller 131 and the second moving roller 133 move leftward to drive the pole piece belt 100 to move leftward, and the defective pole piece 103 is stacked on the waste removing platform 120, at this time, the first moving roller 131 and the second moving roller 133 are located at the leftmost end of the waste removing platform 120; subsequently, the first moving roller 131 and the second moving roller 133 move to the right, and the pole piece belt 100 is moved to the right onto the lamination table assembly 110. At this time, the defective pole piece 103 is located on the rejecting platform 120, the first pole piece 105 is located on the rejecting platform 120 and covers the defective pole piece 103, and the second pole piece 107 is located on the stacking platform assembly 110.

Fig. 3 is a schematic view of an application scenario of the stacking platform assembly 110 and the rejecting platform 120 of the device for rejecting the defective pole piece 103 according to an embodiment of the present invention, please refer to fig. 3.

Optionally, the lay-up table assembly 110 includes a lay-up table and a first presser foot 115, the first presser foot 115 being disposed above the lay-up table and being movable relative to the lay-up table for securing the pole segments 101. The number of the first presser feet 115 is at least two. In this embodiment, the table of the laying platform is substantially rectangular, the number of the first presser feet 115 is four, the first presser feet are substantially rectangular, and the first presser feet are two on the left side and two on the right side. In the Z-shaped stacking process of the pole piece strip 100, one end of the pole piece segment 101 is fixed to facilitate the turning of the pole piece strip 100. Specifically, on the stacking platform assembly 110, when the pole piece belt 100 is about to move to the right from the left side of the stacking platform assembly 110 for turning, the two first presser feet 115 on the left side on the stacking platform move close to the stacking platform and press the pole piece section 101 on the top layer which is stacked, the pole piece belt 100 continues to move to the right and reaches the right end of the stacking platform, when the pole piece belt is about to turn to the left, the two first presser feet 115 on the right side on the stacking platform move close to the stacking platform and press the pole piece section 101 on the top layer, the pole piece belt 100 continues to move to the left, and the reciprocating operation is performed in such a way, so that the Z. Optionally, the first presser foot 115 is coupled to a first power member (not shown) that drives the first presser foot 115 toward or away from the lamination station assembly 110. It is easy to understand that the first power member may adopt a motor or an air cylinder, etc., that is, the movement of the first presser foot 115 may be driven by a motor or an air cylinder, etc., and the movement manner of the first presser foot 115 includes, but is not limited to, back and forth movement and up and down movement, which is not limited in particular here.

Similarly, a second presser foot 125 is disposed above the rejecting platform 120, and the second presser foot 125 can move relative to the rejecting platform 120, and is used for pressing the pole segment 101, i.e. fixing the pole segment 101, when the second presser foot 125 moves close to the rejecting platform 120. When the second presser foot 125 is moved away from the rejecting platform 120, it is used to release the pole segment 101. The number of the second presser feet 125 is at least two. Optionally, the number of the second presser feet 125 is also four in this embodiment, and the second presser feet are distributed in a substantially rectangular shape, two on the left side and two on the right side. The second presser foot 125 is connected to a second power member (not shown) that drives the second presser foot 125 to move toward or away from the reject platform 120. It is easy to understand that the second power member may adopt a motor or an air cylinder, etc., that is, the movement of the second presser foot 125 may be driven by a motor or an air cylinder, etc., and the movement of the second presser foot 125 includes, but is not limited to, back and forth movement and up and down movement, which is not limited in detail herein.

It will be readily appreciated that the first presser foot 115 may be provided on the lay-up platform or spaced from the lay-up platform, provided that relative movement away from or towards the lay-up platform is achieved. Similarly, the second presser foot 125 may be disposed on the rejecting platform 120, or may be disposed at a distance from the rejecting platform 120, as long as it can move relatively far away from or close to the rejecting platform 120, and is not limited herein.

The cutting assembly 140 is disposed between the stacking platform assembly 110 and the rejecting platform 120 for cutting the defective pole piece 103. When the defective pole piece 103 is cut off, the first presser foot 115 and the second presser foot 125 are both in a state of pressing down the pole segment 101, so as to cut off the defective pole piece 103 quickly and smoothly. The cut defective pole piece 103 is left on the rejecting platform 120, and the defective pole piece 103 on the rejecting platform 120 is moved out to a waste bin 160 by a picking assembly 150.

Fig. 4 is a schematic structural diagram of a pickup assembly 150 of an apparatus for removing a defective pole piece 103 according to an embodiment of the present invention, please refer to fig. 4.

The reject platform 120 is driven by a cylinder or a motor to move downward, and the pick-up assembly 150 is disposed adjacent to the reject platform 120 for removing the pole pieces on the reject platform 120, including but not limited to moving the defective pole piece 103 and the first pole piece 105 to the waste bin 160. Alternatively, the picking assembly 150 may be a robotic arm that picks up the defective pole piece 103 and places it in the scrap box 160. Alternatively, the picking assembly 150 may also be a push plate driven by an air cylinder, and the push plate is disposed at a position flush with the top of the waste removing platform 120, and after the waste removing platform 120 arrives, the air cylinder drives the push plate to extend out, so as to push the pole pieces on the waste removing platform 120 into the waste bin 160, which is not limited specifically here. In this embodiment, the pick-up assembly 150 employs a movable clamp. Specifically, the clamping member includes a clamping arm 151 and a clamping hand 153 disposed on the clamping arm 151, the clamping hand 153 includes a first clamping jaw 154 and a second clamping jaw 155 disposed oppositely, and the first clamping jaw 154 and the second clamping jaw 155 can move away from or close to each other. When the first clamping jaw 154 and the second clamping jaw 155 are close to each other, the first clamping jaw is used for clamping the defect pole piece 103 and the first pole piece 105, and at the moment, the defect pole piece 103 and the first pole piece 105 are positioned between the first clamping jaw 154 and the second clamping jaw 155. When the clamping hand 153 picks up the defective pole piece 103 and the first pole piece 105, the first clamping jaw 154 and the second clamping jaw 155 move away from each other to release the defective pole piece 103 and the first pole piece 105, and the defective pole piece 103 and the first pole piece 105 fall into the waste bin 160.

The device for rejecting the defective pole piece 103 is further provided with a controller, and the controller is electrically connected with the detection device, and driving members and power members for driving the cutting assembly 140, the conveying rollers, the moving rollers, the rejecting platform 120, the first presser foot 115, the second presser foot 125, the picking assembly 150 and the like. The detection device detects whether the detection signal is transmitted to the controller, and the controller controls the above components to work according to the received detection signal in a coordinated manner, so as to eliminate the defective pole piece 103.

The controller may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, and the like. Of course, the controller may be integrated as a PLC controller or the like. Preferably, in this embodiment, the controller is a PLC controller.

Optionally, in this embodiment, when stacking is performed on the stacking table assembly 110, each time a pole segment 101 is stacked on the stacking table assembly 110, the stacking table assembly 110 moves downward by a certain distance, so that the oscillating roller assembly 130 can be ensured to move on the same plane all the time, and the operation and control are more convenient and the stacking quality is better.

In the using process of the device for removing the defective pole piece 103, the specific method for removing the defective pole piece 103 mainly comprises the following steps:

A. and detecting whether the pole piece section 101 stacked on the uppermost layer of the lamination assembly 110 in the pole piece belt 100 is a defective pole piece 103.

B. If the pole piece segment 101 stacked on the uppermost layer of the stacking platform assembly 110 is the defective pole piece 103, the defective pole piece 103 is moved out of the stacking platform assembly 110 onto the rejecting platform 120.

C. The pole piece strap 100 is moved back to the lamination station assembly 110.

D. And cutting off the defective pole piece 103 on the waste removing platform 120.

Fig. 5 is a schematic view of an application scenario of the device for removing a defective pole piece 103 according to the embodiment of the present invention in the first state, please refer to fig. 5.

Specifically, in the step a, a high-precision industrial camera is arranged to take a picture of the pole piece segment 101 being laid, and an image recognition technology is used to detect whether the pole piece segment 101 being laid is defective, that is, whether the pole piece segment 101 on the uppermost layer of the platform stacking assembly 110 is a defective pole piece 103. Alternatively, the industrial camera may be disposed above the lamination assembly 110, may be disposed on a side of the lamination assembly 110, and the like, and is not particularly limited herein. Of course, other detection techniques, such as sensor sensing, detector or scanning techniques, may also be used to detect whether the pole piece 103 is defective, and are not limited herein.

Fig. 6 is an application scene schematic diagram of the device for eliminating the defective pole piece 103 provided by the embodiment of the present invention in the second state, and fig. 7 is an application scene schematic diagram of the device for eliminating the defective pole piece 103 provided by the embodiment of the present invention in the third state, please refer to fig. 6 and fig. 7.

In step B, the uppermost defective pole piece 103 of the stacking assembly 110 is moved to the rejecting platform 120.

If the pole piece segment 101 at the uppermost layer of the stacking platform assembly 110 is detected to be the defective pole piece 103, the defective pole piece 103 needs to be moved out of the stacking platform assembly 110 onto the rejecting platform 120. At this time, the rejecting platform 120 moves to a position flush with the defective pole piece 103, and the defective pole piece 103 is driven by the swinging roller assembly 130 to move to the rejecting platform 120. Specifically, as shown in fig. 5 and 6, the open arrows in fig. 5 indicate the direction of movement of the rejecting platform 120 and the direction of movement of the oscillating roller assembly 130, respectively, and fig. 6 shows the rejecting platform 120 moving to a position flush with the defective pole piece 103. When the stacking platform assembly 110 is moved out, as shown in fig. 6 and 7, the pole piece belt 100 on the stacking platform assembly 110 is translated leftwards, the left end of the defective pole piece 103 is moved to the left end of the rejecting platform 120, and the right end of the defective pole piece 103 is moved to the right end of the rejecting platform 120, that is, the defective pole piece 103 is laid on the rejecting platform 120; and then the defective pole piece 103 is fixed on the waste removing platform 120, and the left end of the defective pole piece 103 is pressed by the left presser foot on the waste removing platform 120, namely, one end of the defective pole piece 103 close to the first pole piece 105 is pressed.

Fig. 8 is a schematic view of an application scenario of the device for removing a defective pole piece 103 according to the fourth state of the present invention, and fig. 9 is a partial enlarged view of the position H in fig. 8, please refer to fig. 7, fig. 8, and fig. 9.

In step C, the pole piece tape 100 is moved back to the lamination station assembly 110. Specifically, as shown in fig. 7, during the movement of the pole piece strip 100 back to the lamination station assembly 110, the first non-laminated pole piece segment 101, i.e., the first pole piece 105, connected to the defective pole piece 103 overlies the defective pole piece 103 and also overlies the ejection station 120. The first pole piece 105 is fixed on the rejecting platform 120, that is, two press feet on the right side of the rejecting platform 120 are used for pressing the right end of the first pole piece 105. The strip of pole pieces 100 continues to move onto the lamination station assembly 110 and the second pole piece 107 moves and is laminated onto the lamination station assembly 110 as shown in fig. 5. The above step A, B, C is repeated to detect whether the second pole piece 107 is the defective pole piece 103. If the second pole piece 107 is not the defective pole piece 103, Z-lamination continues on the lamination stage assembly 110 with the second pole piece 107 as the initial pole piece. The second pole piece 107 is secured to the lamination assembly 110 and the second pole piece 107 is pressed by a presser foot on the lamination assembly 110.

If the second pole piece 107 is a defective pole piece 103, it is performed according to steps B and C.

In step D, referring to fig. 8, the defective pole piece 103 on the waste removing platform 120 is cut. The cutting assembly 140 cuts from between the lamination stage assembly 110 and the reject stage 120 to sever the defective pole piece 103 and the first pole piece 105 together, and to separate the defective pole piece 103 and the first pole piece 105 from the pole piece strip 100. Specifically, before the cutting assembly 140 performs cutting, the presser feet on the left and right sides of the stacking assembly 110 respectively press the left and right sides of the second pole piece 107, and the presser feet on the rejecting platform 120 press the defective pole piece 103 and the first pole piece 105, so as to perform smooth cutting. Note that the cutting is to cut off the separator 30 between the adjacent two pole segments 101. The first pole piece 105 may be a defective pole piece 103 or a normal pole piece, but the first pole piece 105 is cut away together with the defective pole piece 103 regardless of whether the first pole piece 105 is the defective pole piece 103 or the normal pole piece. But compared with the existing method for eliminating the whole battery cell, the device for eliminating the defective pole piece 103 can greatly reduce the waste of pole piece materials.

Fig. 10 is a schematic view of an application scenario of the device for removing a defective pole piece 103 according to an embodiment of the present invention after cutting off the defective pole piece 103, please refer to fig. 10 in combination with fig. 2, and fig. 2 shows a schematic view of a structure of the device for removing a defective pole piece 103 in a state of collecting waste materials after cutting off.

After cutting, the rejecting platform 120 moves downwards, the defective pole piece 103 on the rejecting platform 120 moves downwards together with the first pole piece 105, and the picking assembly 150 picks the defective pole piece 103 on the rejecting platform 120 together with the first pole piece 105 and places the pole pieces in the waste bin 160. In this embodiment, after detecting the defective pole piece 103, the rejecting platform 120 is moved to a position flush with the defective pole piece 103, and the defective pole piece 103 is translated to the rejecting platform 120. In other alternative embodiments, the rejecting platform 120 may not be moved, the stacking platform assembly 110 is moved to make the position of the defective pole piece 103 correspond to the position of the rejecting platform 120, and the defective pole piece 103 is moved onto the rejecting platform 120, which is not limited in this respect. In addition, in the present embodiment, the rejecting platform 120 is disposed on the left side of the stacking platform assembly 110, but the invention is not limited thereto, and the rejecting platform 120 may be disposed on the right side, the front side, the rear side, etc. of the stacking platform assembly 110, and is not limited thereto.

Specifically, when the defective pole piece 103 moves to the waste removing platform 120, and the defective pole piece 103 just reaches the right end of the waste removing platform 120, the two second press feet 125 on the right side of the waste removing platform 120 are in a release state, i.e., away from the waste removing platform 120, the defective pole piece 103 continues to move to the left, and when the defective pole piece 103 reaches the leftmost end of the waste removing platform 120 and is about to move to the right, the two second press feet 125 on the left side of the waste removing platform 120 are in a downward pressing state, move close to the waste removing platform 120 and press the defective pole piece 103, and the defective pole piece 103 is fixed on the waste removing platform 120. The first pole piece 105 continues to move to the right, overlying the defective pole piece 103. When the first pole piece 105 reaches the rightmost end of the waste removing platform 120, the two second press feet 125 on the right side of the waste removing platform 120 press the first pole piece 105, and the second pole piece 107 moves to the right continuously and is stacked on the topmost layer of the stacking platform assembly 110. When the defective pole piece 103 is cut off, two first presser feet 115 on the left side above the laying platform press the left end of the second pole piece 107; two first presser feet 115 on the right above the lay-up platform press the right end of the second pole piece 107. At this time, the cutting assembly 140 cuts between the rejecting platform 120 and the stacking platform to cut off and separate the defective pole piece 103 and the first pole piece 105 from the pole piece tape 100, and the first pole piece is left on the rejecting platform 120 after the defective pole piece 103 and the defective pole piece 103. Lamination continues on the lamination table assembly 110 with the second pole piece 107 as the initial pole piece.

The device for eliminating the defective pole piece 103 can eliminate the defective pole piece 103 in time during lamination, and prevents the defective pole piece 103 from flowing into the next procedure to cause detection difficulty and potential safety hazard. Meanwhile, more flawless pole piece strips 100 can be reserved as far as possible, so that the serious waste of pole piece materials is avoided, and the utilization rate of the pole piece materials is greatly improved.

In summary, the device for eliminating the defective pole piece 103 provided by the embodiment has the following beneficial effects:

this reject device of defective pole piece 103, the position relation between each subassembly of make full use of, simple structure, maneuverability is strong, can in time reject defective pole piece 103 when the lamination, prevents that defective pole piece 103 from flowing into next process and causing detection difficulty and potential safety hazard. Meanwhile, more flawless pole piece strips 100 can be reserved as far as possible, so that the serious waste of pole piece materials is avoided, and the utilization rate of the pole piece materials is greatly improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, which may be modified, combined, and varied by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A device for rejecting a defective pole piece is used in a Z-shaped lamination process and comprises: the device comprises a detection device, a stacking platform assembly, a swinging roller assembly, a waste removing platform and a cutting assembly;

the detection device is arranged close to the stacking assembly and used for detecting whether a pole piece section stacked on the uppermost layer of the stacking assembly in the pole piece belt is a defective pole piece or not; the stacking platform assembly is arranged adjacent to the waste removing platform, and the swinging roller assembly is arranged above the stacking platform assembly and can move back and forth above the stacking platform assembly and the waste removing platform; the cutting assembly is arranged between the stacking platform assembly and the waste removing platform and used for cutting the defective pole piece.

2. The device for eliminating the defective pole piece as claimed in claim 1, wherein the stacking platform assembly is provided with a first presser foot for fixing the pole piece.

3. The apparatus according to claim 2, further comprising a first power member connected to the first presser foot for driving the first presser foot to move away from or close to the stacking table assembly.

4. The apparatus as claimed in claim 1, wherein the rejecting platform is provided with a second presser foot for fixing the pole piece.

5. The apparatus as claimed in claim 4, further comprising a second power member connected to the second presser foot for driving the second presser foot to move away from or close to the stacking assembly.

6. The apparatus according to claim 1, further comprising a picking assembly disposed adjacent to the rejecting platform for removing the defective pole piece from the rejecting platform.

7. The device for rejecting the defective pole piece in claim 6, wherein the picking assembly comprises a clamping arm and a clamping hand arranged on the clamping arm, and the clamping hand is used for clamping the defective pole piece and removing the defective pole piece.

8. The device for eliminating the defective pole piece according to claim 7, wherein the clamping hand comprises a first clamping jaw and a second clamping jaw which are oppositely arranged, and a clamping space for clamping the defective pole piece is formed between the first clamping jaw and the second clamping jaw; the first clamping jaw and the second clamping jaw can move close to or away from each other so as to clamp or release the defect pole piece.

9. The apparatus according to claim 7, further comprising a waste bin disposed adjacent to the rejecting platform, wherein the picking assembly moves the defective pole piece on the rejecting platform out to the waste bin.

10. The device for rejecting defective pole pieces according to claim 1, wherein the oscillating roller assembly comprises a first moving roller and a second moving roller, the first moving roller being disposed above the second moving roller, the second moving roller being closer to the lamination assembly than the first moving roller.

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