CN115020785A - Cell stacking method, cell stacking device and cell production line - Google Patents

Abstract

The invention provides a battery cell lamination method, a battery cell lamination device and a battery cell production line. The cell lamination method comprises the following steps: controlling the plurality of mechanical arms to synchronously rotate by preset angles to the positions above the first material taking position, the second material taking position and the plurality of lamination group groups which correspond to each other one by one; controlling a manipulator to grab a first pole piece at a corresponding first material taking position and/or grab a second pole piece at a second material taking position, wherein the first pole piece and the second pole piece are the same or different; controlling a plurality of mechanical arms to synchronously rotate by a preset angle, so that the mechanical arm for grabbing the first pole piece and/or the mechanical arm for grabbing the second pole piece are/is positioned above the adjacent lamination group; controlling the mechanical arm to place the first pole piece and/or the second pole piece on the corresponding lamination group; and laying the diaphragms after the first pole piece and the second pole piece are placed. A plurality of rotatable manipulators are used for alternatively or continuously grabbing a first pole piece positioned at a first material taking position and a second pole piece positioned at a second material taking position to feed adjacent lamination groups in the rotating process, so that the lamination efficiency is improved.

Description

Cell stacking method, cell stacking device and cell production line

technical field

The invention relates to the technical field of battery production, in particular to a battery cell stacking method, a battery core stacking device and a battery core production line.

Background technique

The basic structure of a lithium-ion battery includes a positive electrode sheet, a negative electrode sheet, and a separator between the positive electrode sheet and the negative electrode sheet.

In the manufacturing process of lithium batteries, lamination production of cells is a very important cell manufacturing process. Since the positive and negative plates need to be alternately stacked in the process of cell preparation, and at the same time, a diaphragm is required to separate the pole pieces between the positive and negative plates. The positive and negative deviation correction tables are distributed on both sides of the lamination station, and the pole pieces are transported from the positive/negative pole piece to the positive/negative pole piece by the linear reciprocating motion of the upper manipulator, and finally stacked in the lamination station.

In order to improve the handling efficiency, the current lamination method is generally handled by a multi-mover linear motor, but during the lamination process, the linear motion stroke of the upper manipulator is relatively large, which affects the further improvement of lamination efficiency.

SUMMARY OF THE INVENTION

Therefore, the technical problem to be solved by the present invention is to overcome the defects of the prior art that multiple manipulators have large movement strokes and low lamination efficiency, so as to provide an electric machine in which the manipulators rotate synchronously to pick up and load materials and have high lamination efficiency. Chip stacking method, cell stacking device and cell production line.

In order to solve the above problems, the present invention provides a method for stacking battery cells, which includes: controlling a plurality of manipulators to synchronously rotate a preset angle to a one-to-one corresponding first material taking position, second material taking position and multiple stacking positions above the group; control the manipulator to grab the first pole piece at the corresponding first reclaiming position and/or grab the second pole piece at the second reclaiming position, the first pole piece and the The second pole piece is the same or not the same; a plurality of the manipulators are controlled to rotate the preset angle synchronously, so that the manipulator grabbing the first pole piece and/or the manipulator grabbing the second pole piece are located in the same phase. above the adjacent lamination position group; control the manipulator to place the first pole piece and/or the second pole piece on the corresponding lamination position group.

Optionally, when the first pole piece and the second pole piece are not the same, control the manipulator to place the first pole piece and/or the second pole piece in the corresponding lamination position group, and then also include : Synchronously control a plurality of the manipulators to alternately rotate forward and reversely to rotate the preset angle, so that a plurality of the manipulators alternately rotate from the positions adjacent to the first reclaiming position and the second reclaiming position. The first pole piece and the second pole piece are stacked in the laminated position group; wherein, each layer of the first pole piece or the second pole piece is placed in the laminated position group, and one layer is covered. diaphragm.

Optionally, synchronously control a plurality of the manipulators to alternately rotate forward and reversely to rotate the preset angle, so that a plurality of the manipulators alternately rotate from the first reclaiming level and the second reclaiming level. Stacking the first pole piece and the second pole piece in the adjacent lamination bit group specifically includes: controlling the reclaiming mechanism to reversely rotate a preset angle, so that a plurality of the manipulators return to the initial position synchronously; Control a plurality of the manipulators to descend synchronously, wherein a part of the manipulators take the first pole piece and the second pole piece, and the same number of the manipulators are in the corresponding laminations The first pole piece and the second pole piece are placed in the bit group, and the sum of a part of a plurality of the manipulators and a plurality of the manipulators of the same number is the number of all the manipulators of the reclaiming mechanism; Control the reclaiming mechanism to rotate forward by a preset angle, so that multiple manipulators are respectively located above the stacking position group, above the first reclaiming position and above the second reclaiming position; Each of the manipulators descends synchronously, wherein a part of the multiple manipulators place the first pole piece and the second pole piece in the corresponding lamination position, and the other same number of the manipulators Each of the manipulators takes the first pole piece and the second pole piece.

Optionally, each layer of the first pole piece or the second pole piece is placed in the lamination position group, and a layer of diaphragm is placed, which specifically includes: controlling the diaphragm unwinding mechanism at least partially along the rotation of the manipulator. move in the tangential direction to pull one layer of the diaphragm.

Optionally, when the reclaiming mechanism is controlled to rotate in a reverse direction by a preset angle, or the reclaiming mechanism is controlled to rotate forward by a preset angle, the first rectifying mechanism is controlled at the first reclaiming position. The first pole piece is rectified, and the second rectification mechanism is synchronously controlled to rectify the deviation of the second pole piece at the second reclaiming position.

Optionally, the lamination position group includes one or more lamination positions, the manipulator includes one or more reclaiming parts, the number of the lamination positions, the number of the first reclaiming positions, the The number of the second reclaiming positions is consistent with the number of the reclaiming parts of each of the manipulators.

The invention also provides a cell stacking device, comprising: a reclaiming mechanism, including a rotation center and a plurality of manipulators rotatable around the rotation center, and a plurality of the manipulators are evenly arranged circumferentially around the rotation center; The stacking table is circumferentially arranged around the rotation center, and the stacking table is provided with a stacking position group; wherein, the first material taking position and the second material taking position are alternately arranged between every two adjacent stacked tables. The material level, and the first reclaiming level, the second reclaiming level and the lamination level group are circumferentially arranged around the rotation center, and the angle between the adjacent two is the same as that of the adjacent two. The angle between the manipulators is the same.

Optionally, the number of the stacking table is an even number, the number of the first reclaiming position and the number of the second reclaiming position correspond one-to-one, and the first reclaiming position and the second reclaiming position are in one-to-one correspondence. The sum of the number of pick-up positions is the same as the number of the stacks; or the number of the stacks is an odd number greater than 2.

The present invention also provides a cell production line, comprising: the cell stacking device as described above.

The present invention has the following advantages:

1. Using the technical solution of the present invention, the first pole piece at the first reclaiming position and the second pole piece at the second reclaiming position are alternately or continuously grabbed during the rotation process by a plurality of manipulators rotatable around the rotation center. The pole piece feeds the adjacent lamination bit group, which improves the lamination efficiency.

2. By using multiple manipulators to run on a circular track for reclaiming and discharging, a set of rectifying structure and space are saved, and a set of rotary drives is required, which reduces the driving cost.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

FIG. 1 is a flowchart of a method for stacking battery cells according to an embodiment of the present invention;

2 is a flow chart of a method for stacking battery cells according to another embodiment of the present invention;

3 is a schematic three-dimensional structural diagram of a cell stacking device according to an embodiment of the present invention;

4 is a schematic top-view structural diagram of a cell stacking device according to an embodiment of the present invention;

FIG. 5 is a schematic front view of the structure of a cell stacking device according to an embodiment of the present invention.

Description of reference numbers:

100, lamination device; 110, reclaiming mechanism; 111, manipulator; 1101, first manipulator; 1102, second manipulator; 1103, third manipulator; 1104, fourth manipulator; 121, lamination position group; 1201, first manipulator A lamination position group; 1203, the second lamination position group; 131, the first reclaiming position; 133, the second reclaiming position.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Application overview

When the reciprocating linear motion of the manipulator is used, the stacking method is due to the positive and negative electrode deviation correction tables being arranged on both sides of the stacking table respectively. During the stacking process, the manipulator needs to reciprocate to transport the pole pieces. As a result, the frequency of the stacking laminations is higher than that of the positive and negative poles to a certain extent, and the frequency of the stacking laminations is twice the frequency of the rectification stages on both sides, which makes the efficiency of the rectification stage not fully utilized. At the same time, the stacking frequency is high to a certain extent, which also limits the improvement of the lamination forming efficiency.

In addition, in the process of lamination handling, when the moving stroke of the manipulator is large, in order to improve the efficiency, the handling process needs to use a multi-mover high-power linear motor to carry the laminations.

Exemplary Cell Lamination Method

As shown in Figure 1, the cell stacking method includes:

Step S101 : controlling the plurality of manipulators 111 to rotate by a preset angle synchronously to a position above the first reclaiming position 131 , the second reclaiming position 133 and the plurality of stacking position groups 121 corresponding to one-to-one;

Step S103: control the manipulator 111 to grab the first pole piece at the corresponding first reclaiming position 131 and/or grab the second pole piece at the second reclaiming position 133, the first pole piece and the second pole piece are the same or different. same;

Step S105: controlling the plurality of manipulators 111 to rotate by a preset angle synchronously, so that the manipulators 111 for grabbing the first pole piece and/or the manipulators 111 for grabbing the second pole piece are located above the adjacent lamination bit groups 121;

Step S107 : controlling the manipulator 111 to place the first pole piece and/or the second pole piece on the corresponding lamination position group 121 .

The above cell stacking method is implemented by a stacking device. The plurality of manipulators 111 can rotate around the rotation center, and the first reclaiming position 131, the second reclaiming position 133 and the plurality of lamination position groups 121 are arranged on the ring with the rotation center as the center. A first reclaiming position 131 , a second reclaiming position 133 and a plurality of lamination position groups 121 are evenly arranged below the rotation track, wherein the first reclaiming position is alternately set between every two adjacent lamination position groups 121 . 131 and the second reclaiming position 133, for example, the lamination position group 121, the first reclaiming position 131, the lamination position group 121, the second reclaiming position 133, the lamination position group 121, the first reclaiming position 131. .....and so on. It can be seen that every two lamination position groups 121 are symmetrically arranged with the rotation center as the center of symmetry, and the first material take-up position 131 and the second material take-up position 133 adjacent to the lamination position group 121 are arranged symmetrically. Each cell requires two kinds of pole pieces to be stacked in sequence, so the first pole piece is placed on the first pick-up position 131 , and the second pole piece is placed on the second pick-up level 133 . For example, the first pole piece includes a positive pole piece, and the second pole piece includes a negative pole piece. Here, the first pole piece should be preset as a negative pole piece as much as possible. It should be that the stacking process of the battery cell must be to stack the negative pole piece first and then the positive pole piece. principle.

The diaphragm is laid after placing the first and second pole pieces.

Since the plurality of manipulators 111 are evenly arranged in the circumferential direction with the rotation center as the center, the first reclaiming position 131 , the second reclaiming position 133 and the lamination position group 121 are evenly arranged in the same annular direction, and the first reclaiming position 131 , the second The sum of the number of the reclaiming position 133 and the stacking position group 121 is the same as the sum of the number of the manipulators 111. Therefore, the value of the preset angle should be the distance between the first reclaiming position 131 and the adjacent laminating position group 121. The included angle, or the included angle between the second reclaiming position 133 and the adjacent lamination position group 121 , or the included angle between two adjacent manipulators 111 . Of course, the calculation of various included angles is based on the center line of the stacking position group 121 , the center line of the first reclaiming position 131 , the center line of the second reclaiming position 133 , and the center line of the manipulator 111 .

When the multiple manipulators 111 are synchronously controlled to rotate by a preset angle, there is a manipulator 111 above the first reclaiming position 131 , the second reclaiming position 133 and the multiple lamination position groups 121 in a one-to-one correspondence. The manipulator 111 above the first reclaiming position 131 grabs the first pole piece, or controls the manipulator 111 located at the second reclaiming position 133 to grab the second pole piece, or synchronously controls the manipulator 111 above the first reclaiming position 131 The manipulator 111 and the manipulator 111 located above the second pick-up position 133 respectively grab the first pole piece and the second pole piece. Wherein, the first pole piece and the second pole piece are the same or different. Then control the multiple manipulators 111 to rotate at a preset angle synchronously, so that the manipulator 111 grabs the first pole piece, or the manipulator 111 grabs the second pole piece, or grabs the first pole piece and grabs the second pole piece. The manipulator 111 of the sheet is located above the adjacent lamination position group 121, and then controls the manipulator 111 that grabs the first pole piece to place the first pole piece in the corresponding lamination position group 121, or grabs the second pole piece. The manipulator 111 places the second pole piece in the corresponding lamination position group 121, or controls the manipulator 111 grabbing the first pole piece and the manipulator 111 grabbing the second pole piece to place the first pole piece and the second pole piece synchronously. After the first pole piece and the second pole piece are placed, the diaphragm is laid, so that the lamination is completed in the lamination position group 121 .

Further, when the first pole piece and the second pole piece are the same, and both the first pole piece and the second pole piece include positive and negative electrode thermal composite unit pieces, the control robot 111 is placed in the corresponding lamination position group 121 to place the first pole piece. and/or the second pole piece, and then further comprising: synchronously controlling the plurality of manipulators 111 to continuously rotate by a preset angle, so that the plurality of manipulators 111 grab the first pole piece at the first pick-up position 131 in turn, and sequentially rotate the second pole piece at the second pick-up position 131. The pick-up position 133 picks up the second pole piece.

The above-mentioned first pole piece and the second pole piece can be the same unit piece, and the unit piece includes a positive and negative electrode thermal composite unit piece, and the positive and negative electrode thermal composite unit piece is a composite membrane + negative pole piece + diaphragm + positive pole piece. In this case, the first reclaiming position 131 and the second reclaiming position 133 are placed in the cell, or the multi-layer positive and negative thermal composite cell is formed. During the lamination process, many The manipulator 111 can continuously rotate by a preset angle, and each time a preset angle is rotated, the adjacent lamination position groups 121 are loaded, and the manipulator 111 that has completed the feeding rotates by a preset angle and then grabs another group of first picks. The unit pieces on the material level 131 and the second material take-up level 133 can be continuously fed to a plurality of lamination level groups 121, which improves the efficiency. After the stacking is completed, a negative electrode sheet with a double-sided composite separator can be placed on the top, so that the bottom and top of the cell both include a structure in which the negative electrode sheet is covered by the separator.

When the first pole piece is the same as the second pole piece, and both the first pole piece and the second pole piece are positive pole pieces, the opposite sides of the second pole piece are covered with a diaphragm to form a material tape, and then unwinding through the diaphragm unwinding mechanism In this case, the reclaiming mechanism needs to reciprocate the laminations.

When the first pole piece and the second pole piece are different, controlling the manipulator 111 to place the first pole piece and/or the second pole piece in the corresponding lamination position group 121 , and then further includes: synchronously controlling the plurality of manipulators 111 to alternate forwards Rotate and reversely rotate by a preset angle, so that the plurality of manipulators 111 alternately move the first pole piece and the second pole piece to the stacking position group 121 adjacent to the first reclaiming position 131 and the second reclaiming position 133 .

The above-mentioned first pole piece and second pole piece can be respectively a positive pole piece and a negative pole piece, or the first pole piece is a positive electrode unit piece with a composite unilateral separator, that is, a layer of separator is combined with a layer of positive pole piece, and the second pole piece is a composite of a single-sided diaphragm. The plate is a negative unit piece, that is, a layer of diaphragm and a layer of negative plates are compounded. If the manipulator 111 can place the first pole piece on the adjacent lamination position group 121 by rotating the pre-set angle in the forward direction, when the reverse rotation At a preset angle, the second pole piece can be placed in the lamination position group 121, so that the alternate material feeding of the lamination position group 121 can be realized to complete the lamination of the battery cells. Therefore, in the same period of time, through the reciprocating rotation of the manipulator 111, it is possible to realize the simultaneous lamination of the multiple lamination position groups 121, thereby improving the lamination efficiency. After the lamination is finished, a negative electrode sheet with a double-sided composite separator can be placed on top.

When the first pole piece is different from the second pole piece, and the opposite sides of the first pole piece are covered with the diaphragm, the first reclaiming position can place the unit piece of the first pole piece composite diaphragm, and the second reclaiming position can place the unit piece of the composite diaphragm of the first pole piece. The second pole piece, in this case, does not need a diaphragm unwinding mechanism to unwind the diaphragm.

Further, as shown in FIG. 2 , multiple manipulators 111 are synchronously controlled to alternately rotate forward and reversely by a preset angle, so that multiple manipulators 111 are alternately adjacent to the first reclaiming position 131 and the second reclaiming position 133 . The first pole piece and the second pole piece on the laminated bit group 121 specifically include:

Step S201: controlling the reclaiming mechanism 110 to reversely rotate a preset angle, so that the plurality of manipulators 111 are synchronized back to the initial position;

Step S203 : controlling the multiple manipulators 111 to descend synchronously, wherein a part of the multiple manipulators 111 take the first pole piece and the second pole piece, and another same number of the multiple manipulators 111 place the first pole piece in the corresponding lamination bit group 121 For the pole piece and the second pole piece, the sum of a part of the multiple manipulators 111 and the other same number of multiple manipulators 111 is the number of all the manipulators 111 of one reclaiming mechanism 110;

Step S205: controlling the reclaiming mechanism 110 to rotate forward by a preset angle, so that the plurality of manipulators 111 are respectively located above the stacking position group 121, above the first reclaiming position 131 and above the second reclaiming position 133;

Step S207 : controlling the multiple manipulators 111 to descend synchronously, wherein a part of the multiple manipulators 111 place the first pole piece and the second pole piece in the corresponding lamination position group 121 , and another same number of the multiple manipulators 111 place the first pole piece and the second pole piece in the corresponding lamination position group 121 . The first reclaiming position 1301 and the second reclaiming position 1303 take the first pole piece and the second pole piece;

Each layer of the first pole piece or the second pole piece is placed in the laminated bit group 121, and a layer of diaphragm is placed.

The above-mentioned reclaiming mechanism 110 is provided with a plurality of manipulators 111. When the reclaiming mechanism 110 rotates, the plurality of manipulators 111 can rotate synchronously. When a first reclaiming position 131 and a second reclaiming position 133 are correspondingly set for every two lamination position groups 121 , the multiple manipulators 111 can be rotated to and fro, so that the two lamination position groups 121 can be alternately placed on the first pole. plate and the second pole piece, improve the efficiency. Among them, the number of lamination position groups 121 is the same as the sum of the first reclaiming position 131 and the second reclaiming position 133, and the number of manipulators 111 is the same as that of the lamination position group 121, the first reclaiming position 131 and the second reclaiming position 131. The sum of the material positions 133 is the same, that is, in one state, there is a manipulator 111 above the stacking position group 121 , the first material taking position 131 and the second material taking position 133 . The manipulator 111 can rise or fall, which can realize precise material reclaiming and feeding.

For example, the number of stacking position groups 121 is set to be two, the first material take-up position 131 and the second material take-up position 133 are respectively set to one, and the manipulator 111 is correspondingly set to four as an example. The first deviation rectification mechanism and the second deviation rectification mechanism respectively include a deviation rectification stage, two stacking stages and two deviation rectification stages are symmetrically arranged on the rotation track of the reclaiming mechanism 110, and the stacking stage is provided with a lamination bit group 121, two The center connection line of the lamination bit group 121 of the stacking table is perpendicular to the center connection line of the two deviation correction stages. One or more rectification positions are arranged on the deviation rectification table. The first reclaiming position 131 and the second reclaiming position 133 are respectively set on two deviation rectification stages, which can rectify deviation of one or more pole pieces at the same time. The upper stacking position group 121 can be set with one or more stacking positions, and multiple cells can be stacked at the same time. Each lamination position group 121 has a set of diaphragm unwinding and left and right pulling diaphragm devices. During the left and right movement, one or more laminations can be covered with diaphragms. The reclaiming mechanism 110 drives the four manipulators 111 to rotate 90 degrees back and forth, and the four manipulators 111 perform reclaiming and discharging actions respectively during the movement process, which can realize the stacking of the cells on the two stacking platforms at the same time.

For the convenience of description, as shown in FIG. 4 , the two lamination position groups 121 are named as the first lamination position group 1201 and the second lamination position group 1203 respectively, and the four manipulators 111 are respectively the first manipulator 1101 and the second lamination position group 1203 . The manipulator 1103 , the third manipulator 1105 and the fourth manipulator 1107 , the four manipulators 111 rotate 90 degrees clockwise, the first reclaiming position 131 completes feeding and deviation correction synchronously, and the four manipulators 111 return to the initial position. Then, the four manipulators 111 descend synchronously, wherein the first manipulator 1101 takes the negative electrode sheet at the second reclaiming position 133, the second manipulator 1103 places the positive electrode sheet at the first stacking position group 1201, and the third manipulator 1105 takes the first sheet The material position 131 takes the positive electrode sheet, and the fourth manipulator 1107 puts the negative electrode sheet in the second stacking position group 1203 . Then, the four manipulators 111 rotate counterclockwise by 90°. At the same time, the first reclaiming position 131 and the second reclaiming position 133 complete the feeding and rectification. After rotating in place, the first manipulator 1101 reaches the first lamination position group. Above 1201 , the second manipulator 1103 reaches above the first reclaiming position 131 , the third manipulator 1105 is above the second stacking position group 1203 , and the fourth manipulator 1107 is above the second reclaiming position 133 . Then, the four manipulators 111 descend synchronously, wherein the first manipulator 1101 places the negative electrode sheet at the first stacking position group 1201 , the second manipulator 1103 grabs the positive electrode sheet at the first picking position 131 , and the third manipulator 1105 places the positive electrode sheet The second stacking position group 1203 and the fourth manipulator 1107 grab the negative electrode sheet at the second material taking position 133 . Each time a positive electrode sheet or a negative electrode sheet is stacked in the first stacking position group 1201 and the second stacking position group 1203 , a layer of separator is stacked, and finally a layer of negative electrode sheet and a separator is stacked.

Steps S201 to S207 are repeated, and in this way, the first stacking position group 1201 and the second stacking position group 1203 can simultaneously complete the stacking of positive electrode sheets and negative electrode spacers.

Before repeating the actions from steps S201 to S207, the cell stacking method further performs the following steps:

Step 1: The external manipulator 111 places one or more second pole pieces on the second pick-up position 133 of the negative electrode deviation correction stage. Wherein, the second pole piece placed on the second reclaiming position 133 is a negative pole piece.

Step 2: The negative electrode deviation correction stage corrects the deviation of the placed negative electrode sheet.

Step 3: After the negative electrode deviation correction is completed, the first manipulator 1101 of the reclaiming mechanism 110 takes the negative electrode sheet.

Step 4: The four reclaiming manipulators 111 rotate counterclockwise by 90 degrees at the same time. At the same time, the positive plate deviation correction table completes feeding and deviation correction at the first reclaiming position 131, and the negative plate deviation correction table is at the second reclaiming position 133. Finished feeding and rectifying. After rotating in place, the first manipulator 1101 reaches above the first lamination position group 1201, the second manipulator 1103 is above the first reclaiming position 131, the third manipulator 1105 is above the second lamination position group 1203, and the fourth manipulator 1105 is above the second lamination position group 1203. The manipulator 1107 is above the second pick-up position 133 .

Step 5: The first manipulator 1101 places the negative electrode sheet on the first stacking position group 1201, while the second manipulator 1103 grabs the positive electrode sheet, the third manipulator 1105 is empty, and the fourth manipulator 1107 grabs the negative electrode sheet.

Further, each layer of the first pole piece or the second pole piece is placed in the lamination position group 121, and a layer of diaphragm is placed, which specifically includes: controlling the diaphragm unwinding mechanism to move at least partially along the tangential direction of the rotation of the manipulator 111 to pull the diaphragm. Laminate a membrane.

Each of the above-mentioned layers of negative electrode and positive electrode needs to be covered with a layer of diaphragm. Since the manipulator 111 reaches the stacking position group 121 by rotating to place the negative electrode and positive electrode sheet, and the stacking position group 121 is fixed, therefore , the diaphragm unwinding mechanism needs to be partially moved to avoid the manipulator 111 . When the movable diaphragm unwinding mechanism moves along the tangential direction of the rotation of the manipulator 111 , and pulls a layer of diaphragms during the movement, so that the manipulator 111 lays the diaphragms during the rotation process, which can improve the lamination efficiency.

Therefore, by using two stacking tables with a set of deviation correction tables, compared with the traditional cell stacking method, one stacking stage needs to be equipped with a set of deviation correction methods, and combined with the ascending and descending actions of the manipulator 111 to grab or drop The action of the pole piece changes the horizontal reciprocating movement of the traditional stacking manipulator 111 to the movement of reciprocating and rotating 90 degrees to take the material. There is no empty stroke, the lamination speed is fast, and the lamination efficiency is basically twice that of the conventional lamination.

Further, when the reclaiming mechanism 110 is controlled to rotate in the reverse direction by a preset angle, or when the reclaiming mechanism 110 is controlled to rotate forwardly by a preset angle, the first rectifying mechanism is controlled to rectify the deflection of the first pole piece at the first reclaiming position 131, And synchronously controls the second deviation rectification mechanism to rectify deviation of the second pole piece at the second reclaiming position 133 .

The above-mentioned first reclaiming position 131 is set on the first rectifying mechanism, the first rectifying mechanism can rectify the deviation of the first pole piece, and the second reclaiming position 133 is set on the second rectifying mechanism, and the second rectifying mechanism can correct the deviation of the first pole piece. The diode is corrected. During the synchronous rotation of the multiple manipulators 111, the first pole piece is synchronously corrected at the first reclaiming position 131 and the second pole piece at the second reclaiming position 133. When the multiple manipulators 111 rotate synchronously by a preset angle, the The first pole piece and the second pole piece can complete the deviation correction synchronously, and then the manipulator 111 can be controlled to grab the corresponding first pole piece and the second pole piece, which can improve the efficiency.

Further, the stacking position group 121 includes one or more stacking positions, the manipulator 111 includes one or more reclaiming parts, the number of the stacking positions, the number of the first feeding position 131, the second feeding position 133 The number of is consistent with the number of reclaiming parts of each manipulator 111 .

Each of the above-mentioned manipulators 111 correspondingly includes a plurality of reclaiming parts, and the first reclaiming position 131 and the second reclaiming position 133 can be respectively set in multiples, so that each manipulator 111 can grab the first pole on the corresponding reclaiming position. The stacking position group 121 can be set with multiple stacking positions, so that the multiple reclaiming parts of each manipulator 111 can simultaneously place multiple first or second pole pieces in one-to-one correspondence. on the lamination position. Therefore, the manipulator 111 can synchronously grab or place one or n positive and negative electrodes, and the stacking table can simultaneously complete the stacking of 1 or n cells, where n is a natural number, multiple poles and multiple The arrangement of the cells can be in one row or multiple rows.

Exemplary Cell Lamination Device

As shown in FIG. 3 , a cell stacking device 100 includes: a reclaiming mechanism 110 and a plurality of stacking platforms, the reclaiming mechanism 110 includes a rotation center and a plurality of manipulators 111 that can rotate around the rotation center, and the plurality of manipulators 111 surround The rotation center is uniformly arranged in the circumferential direction, and a plurality of stacking platforms are arranged circumferentially around the rotation center, and every two stacking platforms are arranged symmetrically with the rotation center. The first reclaiming position 131 and the second reclaiming position 133 are alternately arranged between the tables, and the first reclaiming position 131, the second reclaiming position 133 and the lamination position group 121 are arranged circumferentially around the rotation center. The included angle between them is the same as the included angle between two adjacent manipulators 111 .

The above-mentioned cell stacking device 100 includes a reclaiming mechanism 110, a stacking table, a deviation correction table, and a frame. The reclaiming mechanism 110, the lamination table, and the deviation correction table are all fixed on the frame. A plurality of manipulators 111 are evenly arranged in a ring on the reclaiming mechanism 110, and an adsorption device is arranged on the manipulator 111. For example, the adsorption device can be an adsorption plate, The pole piece can be sucked or put down. The pole piece includes a first pole piece and a second pole piece, wherein the first pole piece and the second pole piece can be the same or different.

As shown in FIG. 5 , a plurality of stacking stages and deviation-correcting stages are respectively arranged symmetrically below the manipulator 111 .

The reclaiming mechanism 110 may include a plurality of rotatable and ascending or descending manipulators 111, and the multiple manipulators 111 are evenly arranged around the center of rotation, which can ensure that each manipulator 111 rotates at the same angle to realize the adjacent laminations. The positions are switched between the position group 121 , the positive electrode sheet reclaiming position 131 and the negative electrode sheet reclaiming position 133 . Among them, the positive electrode sheet reclaiming position 131, the negative electrode sheet material taking position 133 and the multiple stacking position groups 121 are respectively opposite to the plurality of manipulators 111 one by one. When the sheet take-up position 133 corresponds to a plurality of lamination position groups 121, the manipulator 111 is located above the positive plate take-up position 131, the negative plate take-up position 133 and the lamination position group 121, so that when the manipulator 111 descends, it can The positive electrode sheet taking position 131 takes the positive electrode sheet, the negative electrode sheet taking position 133 takes the negative electrode sheet, and the positive electrode sheet or the negative electrode sheet is placed in the stacking position group 121 .

The positive electrode sheet take-up position 131 and the negative electrode sheet material take-up position 133 on both sides of the stack assembly are respectively arranged symmetrically with the stack position group 121 provided on the stack assembly. The angle at which the adjacent lamination position group 121 is rotated is equal to the angle at which the manipulator 111 rotates the adjacent lamination position group 121 from the negative electrode sheet removal position 133 . For the convenience of explanation, the plurality of manipulators 111 are divided into two parts, namely the first part and the second part. The plurality of manipulators 111 that initially rotate to the positive electrode sheet reclaiming position 131 and the negative electrode sheet feeding position 133 are the first part of the manipulator, and the initial rotation The plurality of robots 111 to the stacking position group 121 are the second part robots, and the number of the first part robots is equal to the number of the second part robots. After the first part of the manipulator grabs the positive electrode sheet and the negative electrode sheet at the same time, the plurality of manipulators 111 rotate at a preset angle synchronously, that is, the stacking position group 121 of each stacking assembly and the positive electrode sheet material removal position 131 or the negative electrode sheet material removal position 133, the first part of the manipulator 111 will rotate to the right above the adjacent lamination position group 121, and the second part of the manipulator will synchronously rotate to the adjacent positive plate pick-up position 131 and negative pole. Level 133. When the first part of the manipulator 111 places the captured positive electrode and negative electrode in the corresponding stacking assembly stacking position group 121, the second part of the manipulator can simultaneously grab the positive electrode and the negative electrode. When the first part of the manipulator finishes placing the positive electrode sheet and the negative electrode sheet, the second part of the manipulator can synchronously complete the grabbing of the positive electrode sheet and the negative electrode sheet. At this time, when the plurality of manipulators 111 are rotated in the reverse direction by a preset angle, the second part of the manipulators will rotate to the top of the adjacent lamination position group 121 , while the first part of the manipulators will rotate to the adjacent positive plate pick-up positions 131 and 121 . The negative electrode sheet is located above the material removal position 133, therefore, by continuously repeating the above process, the stacking efficiency can be improved.

The above-mentioned multiple manipulators 111 can be respectively connected to the turntable, so that the multiple manipulators 111 rotate synchronously with the rotation of the turntable.

Further, the number of stacking platforms is an even number, the number of the first reclaiming positions 131 and the number of the second reclaiming positions 133 are in one-to-one correspondence, and the sum of the numbers of the first reclaiming positions 131 and the second reclaiming positions 133 The same as the number of stacks; or the number of stacks is an odd number greater than 2.

The number of the above-mentioned stacking bit groups 121 may be 2, 4, 6, 2N, N=1, 2, 3, 4, and so on. For example, when the above-mentioned stacking position groups 121 are set to four, the positive electrode sheet material removal positions 131 are set to two, the negative electrode sheet material removal positions 133 are set to two, and the preset angle of rotation of the plurality of manipulators 111 is 45 degrees. , when the multiple manipulators 111 are rotated 45 degrees in the forward direction or 45 degrees in the reverse direction, the positive and negative electrodes can be alternately applied to the four stacking bit groups 121 , thereby further improving the stacking efficiency. When the above-mentioned stacking position groups 121 are set to six, then the positive electrode sheet reclaiming positions 131 are set to three, the negative electrode sheet feeding positions 133 are also set to three, and the preset angle of rotation of the plurality of manipulators 111 is 30 degrees. When the multiple manipulators 111 are rotated 30 degrees in the forward direction or 30 degrees in the reverse direction, the positive electrode sheets and the negative electrode sheets can be alternately applied to the six stacking bit groups 121 , so that the stacking efficiency can be further improved.

Therefore, it can be seen that for each additional set of positive electrode sheet reclaiming position 131 and negative electrode sheet material taking position 133, two stacking position groups 121 can be correspondingly added, and the number of stacking position groups 121 is an even number. The negative electrode sheet take-out positions 133 are alternately arranged between two adjacent stacking position groups 121 . When there are more groups of positive electrode sheet reclaiming positions 131 and negative electrode sheet material taking positions 133 , the more stacking position groups 121 are required, and the higher the lamination efficiency is.

Exemplary cell production line

A cell production line includes the above cell stacking device.

The above-mentioned cell stacking device includes a reclaiming mechanism 110, a stacking table, a deviation correction table, and a frame. The reclaiming mechanism 110, 2n lamination tables, and 2n deviation correction tables are all fixed on the frame. The reclaiming mechanism 110 is evenly arranged with 4n picking robots 111 in a ring shape, and an adsorption device is arranged on the robot 111, which can be sucked or put down. Pole pieces; 2n stacking stages and 2n deviation correction stages are respectively arranged in a ring shape below the pole piece transfer manipulator 111 . The 4n manipulators 111 on the reclaiming mechanism 110 can rotate forward and reversely by a preset angle, and can simultaneously take and stack films from 2n stacking stages and 2n deviation-correcting stages at the same time.

In addition, the manipulator 111 can also pick and place one or n pole pieces at the same time, and the stacking table can complete the stacking of one or n cells at the same time, where n is a natural number, and the The arrangement may be multiple in one row or multiple rows in multiple rows.

Among them, when the number of 2n stacking stages and 2n deviation rectification stages is n=2, the total number of deviation rectification stages and stacking stages is 4, and the rotation angle of the reclaiming manipulator 111 during the stacking process is 90°. When n=4, the deviation rectification stage The total number of tables and stacking tables is 8, and the rotation angle of the reclaiming manipulator 111 during the stacking process is 45°, and so on.

The cell lamination device can be used to make ordinary Z-shaped laminated cells, and can also be used to laminate and heat composite laminated cells. details as follows:

Application method 1: Replace the ordinary Z-stacked cells with the negative composite tape of the double-sided composite diaphragm. Only the positive electrode sheet is corrected on the deviation correction table, and the manipulator 111 grabs the positive electrode sheet and the composite negative electrode sheet for Z stacking.

Application mode 2: Replace the positive and negative electrode sheets on the positive and negative electrode deviation correction with the positive and negative electrode unit sheets of composite single-sided diaphragms, respectively. The positive electrode unit sheet consists of a layer of A single sheet is a composite of a layer of separators and a layer of negative electrode. The manipulator 111 stacks the negative electrode unit and the positive unit on the stacking table alternately. After the stacking is completed, a double A negative electrode unit with a composite separator.

Application mode 3: When replacing the pole pieces on the positive and negative deviation correction stage with the same unit piece, such as the positive and negative poles compounded together, the compounded piece includes diaphragm + negative pole + diaphragm + positive pole. During the lamination process , the manipulator 111 for taking material can rotate continuously without reciprocating rotation angle. At this time, the value of n described in 2 may be an odd number greater than 2, such as 3, 5, and so on.

According to the above description, the present application has the following advantages:

1. The efficiency of stacking can be greatly improved. If only a single cell is stacked in each stacking station, the stacking efficiency is twice the original efficiency. ,3...) cells when the lamination efficiency is 2n times the original efficiency.

2. The structure of the stacking table is simple and the cost is low: the stacking table and the deviation rectifying stage are arranged in a ring shape, which saves a set of deviation rectification structure. At the same time, the structure of the reclaiming mechanism 110 is simple. motor.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. configuration and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. And the obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims (10)

1. A method for stacking a battery cell, comprising: Controlling the plurality of manipulators (111) to rotate at a preset angle synchronously to a position above the first material reclaiming position (131), the second material reclaiming position (133) and the plurality of lamination position groups (121) in one-to-one correspondence; Control the manipulator (111) to grab the first pole piece at the corresponding first reclaiming position (131) and/or grab the second pole piece at the second reclaiming position (133). A pole piece is the same or different from the second pole piece; Controlling a plurality of the manipulators (111) to rotate the preset angle synchronously, so that the manipulators (111) grabbing the first pole piece and/or the manipulators (111) grabbing the second pole piece are located adjacent to each other above the lamination bit group (121); The manipulator (111) is controlled to place the first pole piece and/or the second pole piece on the corresponding lamination position group (121). 2 . The method for stacking battery cells according to claim 1 , wherein when the first pole piece and the second pole piece are different, the manipulator ( 111 ) is controlled to place the corresponding stack on the stack. 3 . The bit group (121) places the first pole piece and/or the second pole piece, and then further includes: synchronously controlling a plurality of the manipulators (111) to alternately rotate forward and reversely by the preset angle, so that a plurality of all The manipulator (111) alternately stacks the first pole piece and the stacking position group (121) adjacent to the first reclaiming position (131) and the second reclaiming position (133). The second pole piece; wherein, each layer of the first pole piece or the second pole piece is placed in the laminated position group (121) and covered with a layer of diaphragm. 3. The cell stacking method according to claim 2, characterized in that a plurality of the manipulators (111) are controlled synchronously to rotate forward and reversely by the preset angle alternately, so that a plurality of the manipulators (111) 111) Alternately stacking the first pole piece and the second pole piece to the stacking position group (121) adjacent to the first reclaiming position (131) and the second reclaiming position (133); Diodes, including: Controlling the reclaiming mechanism (110) to reversely rotate a preset angle, so that a plurality of the manipulators (111) are synchronized back to the initial position; Controlling a plurality of the manipulators (111) to descend synchronously, wherein a part of the plurality of the manipulators (111) take the first pole piece and the second pole piece, and another same number of the manipulators (111) take the first pole piece and the second pole piece 111) Place the first pole piece and the second pole piece in the corresponding lamination position group (121), and a part of the multiple manipulators (111) and the same number of the manipulators The sum of (111) is the number of all the manipulators (111) of one reclaiming mechanism (110); The reclaiming mechanism (110) is controlled to rotate forward by a preset angle, so that a plurality of manipulators (111) are respectively located above the stacking position group (121), above the first reclaiming position (131) and Above the second reclaiming level (133); Controlling a plurality of the manipulators (111) to descend synchronously, wherein a part of the plurality of the manipulators (111) place the first pole piece and the first pole piece in the corresponding lamination position group (121). Diode pieces, the other same number of the manipulators (111) take the first pole piece and the second pole piece. 4. The method for stacking battery cells according to claim 3, characterized in that, each layer of the first pole piece or the second pole piece is placed in the stacking position group (121), and a layer of diaphragm is placed , which specifically includes: controlling the diaphragm unwinding mechanism to move at least partially along the tangential direction of the rotation of the manipulator (111) to pull and stack a layer of the diaphragm. 5. The battery cell stacking method according to claim 3, characterized in that the control of the reclaiming mechanism (110) to reversely rotate a preset angle, or the control of the reclaiming mechanism (110) to be positive When turning to a preset angle, the first rectifying mechanism is controlled to rectify the first pole piece at the first reclaiming position (131), and the second rectifying mechanism is synchronously controlled at the second reclaiming position (133). ) to correct the deviation of the second pole piece. 6. The battery cell stacking method according to any one of claims 1 to 5, wherein the stacking position group (121) includes one or more stacking positions, and the manipulator (111) includes One or more reclaiming parts, the number of the lamination positions, the number of the first reclaiming positions (131), the number of the second reclaiming positions (133) and each of the manipulators (111) The number of the reclaiming part is the same. 7 . The method for stacking battery cells according to claim 1 , wherein when the first pole piece and the second pole piece are the same, and both the first pole piece and the second pole piece include positive and negative electrodes The thermal composite single piece, controlling the manipulator (111) to place the first pole piece and/or the second pole piece on the corresponding lamination position group (121), and then further comprising: synchronously controlling a plurality of the manipulators (111) ) continuously rotate the preset angle, so that a plurality of the manipulators (111) sequentially grab the first pole piece at the first reclaiming position (131), and sequentially at the second reclaiming position (133) Take the second pole piece. 8. A cell stacking device, comprising: a material reclaiming mechanism (110), comprising a rotation center and a plurality of manipulators (111) rotatable around the rotation center, and a plurality of the manipulators (111) are evenly arranged circumferentially around the rotation center; a plurality of stacking platforms, circumferentially arranged around the rotation center, and a stacking position group (121) is arranged on the stacking platforms; Wherein, a first material reclaiming position (131) and a second material reclaiming position (133) are alternately set between every two adjacent stacking platforms, and the first material reclaiming position (131), the second material reclaiming position (131), the The second pick-up level (133) and the lamination level group (121) are circumferentially arranged around the rotation center, and the angle between the two adjacent ones is the same as the angle between the two adjacent manipulators (111). the same angle. 9 . The cell stacking device according to claim 8 , wherein the number of the stacking platforms is an even number, and the number of the first reclaiming positions ( 131 ) and the second reclaiming positions ( 133) are in one-to-one correspondence, and the sum of the number of the first reclaiming level (131) and the second reclaiming level (133) is the same as the number of the stacks; or the number of the stacks is an odd number greater than 2. 10. A cell production line, characterized by comprising: the cell stacking device (100) according to claim 8 or 9.

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