CN109346774B - Swing type lamination machine and lamination method - Google Patents
Swing type lamination machine and lamination method Download PDFInfo
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- CN109346774B CN109346774B CN201811257612.3A CN201811257612A CN109346774B CN 109346774 B CN109346774 B CN 109346774B CN 201811257612 A CN201811257612 A CN 201811257612A CN 109346774 B CN109346774 B CN 109346774B
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- 238000003475 lamination Methods 0.000 title claims abstract description 383
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 238000003825 pressing Methods 0.000 claims description 33
- 239000012528 membrane Substances 0.000 claims description 25
- 238000005520 cutting process Methods 0.000 claims description 11
- 238000010030 laminating Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a swing type lamination machine and a lamination method, wherein the swing type lamination machine comprises the following components: the rotary body can rotate along the rotating shaft, N lamination platforms are arranged on the circumferential outer wall of the rotary body, are arranged in an array mode around the rotating shaft and are adjacent to each other; the lamination table is used for folding the lamination belt to form lamination cells; n is an integer greater than or equal to 2; and a swing roller arranged above the rotating body, wherein the swing roller is used for conveying the lamination belt to the lamination table and tensioning the lamination belt when lamination is carried out. After the lamination table stacks the lamination battery cells, the rotating body rotates to the other lamination table, the other lamination table is connected with the belt, the time for threading and correcting the lamination belt is reduced in the process, and the production efficiency is further improved. Meanwhile, the swing type lamination machine introduction detection system detects the distance between adjacent pole pieces on the pole piece layer on the outermost layer of the lamination belt, so that the alignment degree of lamination battery cells is corrected, and the product quality is further improved.
Description
Technical Field
The invention relates to the field of laminated battery core manufacturing, in particular to a swing type lamination machine and a lamination method.
Background
The bottleneck of large-scale application of laminated battery cell manufacturing is mainly embodied in that the efficiency of the existing lamination equipment is low, the blanking auxiliary time is long, and the production efficiency of the whole machine is affected.
The existing lamination cell manufacturing process mainly comprises the following two steps:
firstly, manufacturing a laminated battery cell by inserting a pole piece in the middle of a Z-shaped diaphragm, wherein the mode uses a fixed lamination table or a reciprocating lamination table to finish stacking;
secondly, after bonding the pole pieces and the diaphragm through a composite type, stacking the pole pieces and the diaphragm layer by using a mechanical arm to manufacture the laminated battery cell, wherein the mode uses a fixed lamination table to complete stacking by matching with a four-axis mechanical arm.
The two processes have the following defects:
the first and Z-shaped lamination single-station efficiency is low, the diaphragm is easy to fold in the lamination process, the local lithium precipitation of the battery cell is caused, potential safety hazards are generated, the pole pieces and the diaphragm are respectively stacked, secondary positioning errors are easy to cause, and the precision is affected;
secondly, accumulated errors exist in the intervals of the units of the pole pieces, and the fixed pressing needle is adjusted, so that the alignment degree of the battery cells is unqualified, and potential quality hazards and potential safety hazards exist;
thirdly, the manipulator stacking single-station efficiency is low, and the equipment investment cost is high.
Accordingly, there is a need for improvements and modifications in the art.
Disclosure of Invention
The present application is directed to a swing lamination machine and lamination method to improve the efficiency of manufacturing finished laminated cells.
According to a first aspect of the present application, there is provided a swing lamination machine comprising:
the rotary body can rotate around the rotating shaft, N lamination platforms are arranged on the circumferential outer wall of the rotary body, are arranged in an array mode around the rotating shaft and are adjacent to each other; the lamination table is used for folding the lamination belt to form lamination cells; n is an integer greater than or equal to 2;
a swing passing roller disposed above the rotating body, the swing passing roller being for conveying the lamination belt to the lamination table, tensioning the lamination belt while laminating;
after the lamination table is connected with the belt, the rotation body drives the lamination table to swing in the circumferential direction through the rotation of the rotation body, so that the lamination belt is folded; after the lamination is completed by the lamination table, the rotating body is switched to the adjacent lamination table for lamination through rotation of the rotating body.
After the tape is connected with the lamination table, when the lamination table is positioned on the left side of the rotating body, the rotating body rotates clockwise around the rotating shaft by a first preset angle to enable the lamination table to swing to the right side of the rotating body, and the lamination tape is folded once; when the lamination table is positioned on the right side of the rotating body, the rotating body rotates anticlockwise by a first preset angle around the rotating shaft to enable the lamination table to swing to the left side of the rotating body, and the lamination belt is folded once; multiple folds of the lamination belt are realized by the circulation; after the lamination is completed by one lamination table, when the lamination table is positioned on the left side of the rotary body, the rotary body rotates anticlockwise by a second preset angle around the rotary shaft to enable the next lamination table to be connected with the belt, and when the lamination table is positioned on the right side of the rotary body, the rotary body rotates clockwise by the second preset angle around the rotary shaft to enable the next lamination table to be connected with the belt.
The swing type lamination machine comprises a rotary body, a swinging roller, a rotary shaft and a lamination belt, wherein the rotary body rotates clockwise around the rotary shaft and simultaneously moves leftwards along the horizontal direction through the swinging roller so as to tension the lamination belt when the lamination table performs lamination; the swing roller moves rightward in a horizontal direction to tension the lamination belt while the rotating body rotates counterclockwise around the rotating shaft.
The swing lamination machine, wherein the lamination belt comprises: the membrane comprises two layers of membrane strips which are arranged in a stacked manner, a first pole piece layer arranged between the two layers of membrane strips, an upper second pole piece layer arranged on the upper surface of the upper layer of membrane strip, and a lower second pole piece layer arranged on the lower surface of the lower layer of membrane strip; the first pole piece layer comprises a plurality of first pole pieces which are arrayed in a straight line along the length direction of the laminated strip; the upper second pole piece layer comprises a second pole piece positioned right above the first pole piece, and one second pole piece is arranged right above each even-number-bit or odd-number-bit first pole piece; the lower second pole piece layer comprises a second pole piece positioned right below the first pole piece, and one second pole piece is arranged right below each odd-numbered or even-numbered first pole piece.
The swing lamination machine, wherein, be provided with at least on the lamination platform: a first presser finger and a second presser finger; the first pressing needle and the second pressing needle are respectively arranged on two sides of the lamination table along the circumferential direction of the rotating body; the first pressing needle and the second pressing needle are used for pressing the diaphragm belt between two adjacent first pole pieces so that the lamination belt can be folded when the lamination table swings.
The swing type lamination machine is characterized in that a first detection system is arranged in front of the front face of an unfolded lamination belt, and a second detection system is arranged in front of the back face of the unfolded lamination belt; the first detection system is used for detecting whether the distances between every two adjacent second pole pieces on the front surface of the laminated strip are equal or not so as to find out the second pole piece with offset; the second detection system is used for detecting whether the intervals between every two adjacent second pole pieces on the back surface of the laminated strip are equal or not so as to find out the second pole piece which is offset; the lamination station further comprises: at least one first presser finger drive assembly and at least one second presser finger drive assembly; the first needle pressing driving assembly is used for driving the first needle pressing to press the second pole piece which is deviated after the first needle pressing presses the diaphragm belt so as to rectify the deviation; the second needle pressing driving assembly is used for driving the second needle pressing to press the second pole piece which is deviated after the second needle pressing presses the diaphragm belt so as to correct deviation; the first detection system is electrically connected with the first needle pressing driving assembly, and the second detection system is electrically connected with the second needle pressing driving assembly.
The swing lamination machine, wherein still include: the cutting assembly is arranged between every two adjacent lamination platforms; the cutting assembly is used for cutting off the lamination belt between adjacent lamination platforms after one lamination platform completes lamination and the adjacent lamination platforms are connected with the belt.
The swing type lamination machine comprises a rotary body, wherein the circumferential outer wall of the rotary body is a regular polygon, lamination platforms are arranged on the edges of the regular polygon, and the number of the lamination platforms on one edge of the regular polygon is not more than one; the rotating shaft is positioned at the center of the regular polygon; the first preset angle and the second preset angle are angles in a preset angle interval; the preset angle interval comprises an included angle between adjacent lamination platforms.
The swing lamination machine, wherein still include: a grip pass roller disposed before the swing pass roller; the clamping roller is used for flattening the lamination belt.
According to a second aspect of the present application, the present application further provides a lamination method based on the swing lamination machine, including the following steps:
a lamination strip manufacturing step of manufacturing a lamination strip; the laminate strip includes: the membrane comprises two layers of membrane strips which are arranged in a stacked manner, a first pole piece layer arranged between the two layers of membrane strips, an upper second pole piece layer arranged on the upper surface of the upper layer of membrane strip, and a lower second pole piece layer arranged on the lower surface of the lower layer of membrane strip; the first pole piece layer comprises a plurality of first pole pieces which are arrayed in a straight line along the length direction of the laminated strip; the upper second pole piece layer comprises a second pole piece positioned right above the first pole piece, and one second pole piece is arranged right above each even-number-bit or odd-number-bit first pole piece; the lower second pole piece layer comprises a second pole piece positioned right below the first pole piece, and one second pole piece is arranged right below each odd-numbered or even-numbered first pole piece;
a lamination belt folding step, namely folding the lamination belt along a diaphragm belt between two adjacent first pole pieces to form a lamination cell;
and a lamination tape splicing step of splicing the lamination tape with another lamination stage adjacent to the lamination stage forming the lamination cell, and refolding the lamination tape.
The beneficial effects of the invention are as follows:
the invention provides a swing type lamination machine and a lamination method, wherein the swing type lamination machine comprises the following components: the rotary body can rotate along the rotating shaft, N lamination platforms are arranged on the circumferential outer wall of the rotary body, are arranged in an array mode around the rotating shaft and are adjacent to each other; the lamination table is used for folding the lamination belt to form lamination cells; n is an integer greater than or equal to 2; a swing passing roller disposed above the rotating body, the swing passing roller being for conveying the lamination belt to the lamination table, tensioning the lamination belt while laminating; after the lamination table is connected with the belt, the rotation body drives the lamination table to swing in the circumferential direction through the rotation of the rotation body, so that the lamination belt is folded; after the lamination is completed by the lamination table, the rotating body is switched to the adjacent lamination table for lamination through rotation of the rotating body. After one lamination table is used for stacking one lamination cell, the swing lamination machine directly rotates to the other lamination table through the rotation of the rotating body, the other lamination table is connected with the lamination belt, and the lamination belt is restarted to be folded. The process reduces the time for threading and correcting the lamination belt when the lamination belt is connected, and improves the production efficiency.
Drawings
Fig. 1 is a schematic diagram of a swing lamination machine according to the present invention when stacking a first lamination cell;
fig. 2 is a schematic diagram ii of the swing lamination machine according to the present invention when stacking a first lamination cell;
FIG. 3 is a schematic view of a laminate strip;
FIG. 4 is a schematic diagram of a laminated cell;
FIG. 5 is a top view of the lamination station;
FIG. 6 is a schematic diagram I of a swing type laminating machine according to the present invention when a tape is laminated;
FIG. 7 is a second schematic diagram of the swing type laminating machine according to the present invention when the tape is attached;
fig. 8 is a schematic structural diagram of an oscillating lamination machine according to another embodiment of the present invention;
fig. 9 is a flow chart of a lamination method provided by the invention.
Detailed Description
The invention will be described in further detail below with reference to the drawings by means of specific embodiments.
Embodiment 1,
Referring to fig. 1, the swing type lamination machine provided in this embodiment is specifically a lamination machine for producing laminated electric cores. This swing formula lamination machine mainly includes: the lamination apparatus includes a rotating body 10, N lamination stages 20, and a swinging roller 40, where N is an integer of 2 or more.
The rotary body 10 is provided on the fixed frame 11, and the rotary body 10 is rotatable about its own rotation axis. I.e. the rotation axis of the rotation body is arranged on the fixing frame 11. The N lamination stages 20 are disposed on the circumferential outer wall of the rotary body 10, and the N lamination stages 20 are disposed in a circumferential array around the rotary shaft and are adjacent to each other. The lamination station 20 is used to fold the lamination tape to form the laminated cells.
In this embodiment, the circumferential outer wall of the rotary body 10 is a regular polygon, that is, the cross section of the rotary body 10 is a regular polygon with the view angle in fig. 1 as the first view angle, the rotation axis is located at the center of the cross section of the regular polygon, and each side of the cross section of the regular polygon represents one plane. The lamination stations 20 are arranged on the sides of the regular polygon, i.e. on the sides in the cross section of the regular polygon, and the number of lamination stations 20 on one side of the regular polygon does not exceed one. In other words, if the rotary body 10 is specifically in a square shape, the rotary shaft is located at the centers of the opposite sides of the square shape, that is, the axial line of the rotary shaft passes through the centers of the opposite sides, and the circumferential direction of the rotary body 10 is the other surface adjacent to the opposite sides of the square shape.
The swing roller 40 is arranged above the rotating body 10, the swing roller 40 is used for conveying the lamination belt 90 to the lamination table 20, and tensioning the lamination belt 90 when the lamination table 20 folds the lamination belt, so that the phenomenon of wrinkling of the lamination battery cell is avoided, the problem of lithium precipitation of the finished lamination battery cell is avoided, and the product quality is improved. Specifically, the swing stick 40 reciprocates in the horizontal direction in a plane perpendicular to the rotation axis of the rotating body 10 itself.
Before the swing type lamination machine starts to work, a free end connection belt (i.e. fixed) of the lamination belt 90 is arranged on one of the lamination platforms 20, the swing passing rod 40 is kept not to move, and then the rotating body 10 rotates around a rotating shaft to drive the lamination platform 20 to swing in the circumferential direction of the rotating body 10, so that the lamination platform 20 folds the lamination belt 90 to form a lamination cell. After the lamination station 20 has completed folding the lamination strip, the rotary body 10 is switched to an adjacent further lamination station by rotating about its own axis of rotation, which further lamination station receives the strip lamination strip, after which it resumes folding the lamination strip to form a new lamination cell.
As described above, in conjunction with fig. 1 and 2, after one of the lamination stages 20 joins the lamination belt 90, if the lamination stage 20 is located at the left side of the rotating body 10, the rotating body 10 rotates clockwise around its own rotation axis by a first preset angle so that the lamination stage swings to the right side of the rotating body 10, and the lamination stage 20 performs one folding of the lamination belt 90 to form a laminated battery cell. If the lamination table 20 is located on the right side of the rotating body, the rotating body 10 rotates counterclockwise around its own rotation axis by a first preset angle so that the lamination table 20 swings to the left side of the rotating body 10, and the lamination table 20 folds the lamination belt 90 to complete one folding to form a lamination cell. Multiple folds of the laminated strip 90 are achieved in this reciprocating cycle, the number of folds being set according to the number of layers required for the laminated cells.
After one of the lamination stations 20 completes lamination, if the lamination station 20 is positioned at the left side of the rotating body, the rotating body 10 rotates around the rotating shaft of the rotating body anticlockwise by a second preset angle, so that the next lamination station adjacent to the rotating body is connected with the tape lamination belt to restart lamination; if the lamination station 20 is on the right side of the rotary body 10, the rotary body 10 rotates clockwise around its own rotation axis by a second preset angle, so that the lamination station adjacent thereto restarts lamination by splicing the lamination tape.
In this embodiment, the first preset angle and the second preset angle are both angles in a preset angle interval, and the preset angle interval includes an included angle between adjacent lamination stages. Assuming that the angle between adjacent lamination stations is α, the preset interval may be α±0.5α.
As shown in fig. 1, the section of the rotary body 10 is an equilateral triangle, two lamination platforms are arranged on the equilateral triangle, and are respectively arranged on two adjacent sides of the equilateral triangle, so that the included angle between the two lamination platforms is 60 degrees, the swing rod 40 is kept still, one lamination platform is connected with the lamination belt 90, and after the rotary body 10 rotates around the rotation shaft of the rotary body in the anticlockwise direction by 30 degrees or more than 30 degrees in fig. 1, the rotary body forms a position as shown in fig. 2, and the lamination platforms form a lamination cell once stacked on the lamination belt; after the rotary body 10 is rotated by 60 ° or more in the clockwise direction about its own rotation axis, the lamination stage folds the lamination tape a second time to form a two-layered lamination cell. And (3) repeating the steps until the number of layers required by the laminated battery cells is increased, and completing the manufacture of the laminated battery cells. After the laminated battery core is manufactured, if the lamination table is positioned at the left side of the rotary body 10, the rotary body 10 rotates by 30 degrees around the rotation shaft of the rotary body 10 in the anticlockwise direction, so that the next lamination table adjacent to the rotary body is connected with a lamination belt to restart lamination; if the lamination station is on the right side of the rotary body 10, the rotary body 10 rotates 30 ° clockwise around its own rotation axis, so that the next lamination station adjacent thereto is attached with the lamination tape to restart lamination. In the process of folding the laminated strip, the laminated strip is always in a tensioning state.
In an embodiment, lamination platforms are arranged on three sides of the equilateral triangle, which is different from the embodiment only in that after one lamination platform completes lamination, two lamination platforms can be selected to fold the next lamination belt, so that when the belt is connected, the rotation direction of the rotating body can be two, more rotation directions are selected, and when one lamination platform cannot be used due to faults, the use of the machine is not affected.
In other embodiments, if only two lamination stages are provided, the section of the rotating body 10 may be isosceles right triangle, and two right sides of the isosceles right triangle are respectively provided with one lamination stage, the included angle between the two lamination stages is 90 °, the swing rod 40 is kept still, one lamination stage is connected to the lamination belt 90, and after the rotating body 10 rotates around its rotation axis in the anticlockwise direction by 45 ° or more in fig. 1 to form a position as shown in fig. 2, the lamination stage folds the lamination belt once to form a laminated battery cell. After the rotary body 10 is rotated by 135 ° or more than 135 ° in the clockwise direction around its own rotation axis, the lamination stage folds the lamination tape a second time to form a two-layered lamination cell. And (3) repeating the steps until the number of layers required by the laminated battery cells is increased, and completing the manufacture of the laminated battery cells. After the laminated battery core is manufactured, if the lamination table is positioned at the left side of the rotary body 10, the rotary body 10 rotates by 45 degrees around the rotation shaft of the rotary body 10 in the anticlockwise direction, so that the next lamination table adjacent to the rotary body is connected with a lamination belt to restart lamination; if the lamination station is on the right side of the rotary body 10, the rotary body 10 rotates 45 ° clockwise around its own rotation axis, so that the next lamination station adjacent thereto restarts lamination by splicing the lamination tape.
In this embodiment, when the lamination table performs lamination, the swing roller 40 moves leftward in the horizontal direction while the rotary body 10 rotates clockwise around its own rotation axis, that is, the swing roller 40 drives the lamination belt 90 to move leftward in the horizontal direction in a plane perpendicular to the axis of the rotation axis of the rotary body 10, so as to tension the lamination belt 90 conveyed by the swing roller 40 itself. When the lamination table performs lamination, the swing roller 40 moves rightward in the horizontal direction while the rotary body 10 rotates counterclockwise about its own rotation axis, that is, the swing roller 40 drives the lamination belt 90 to move rightward in the horizontal direction in a plane perpendicular to the axis of the rotation axis of the rotary body 10, so as to tension the lamination belt 90 conveyed by the swing roller 40 itself. In this process, the rotation angle of the rotating body 10 is correspondingly reduced, the space occupied by the rotating body with reduced rotation angle is correspondingly reduced, the production space is saved, and the production cost is indirectly reduced. Meanwhile, the lamination belt 90 is always kept in a tight state in two different moving directions, and tension is provided for the lamination belt 90, so that the lamination table 20 is ensured not to have the phenomenon of wrinkling when the lamination belt 90 is stacked, and the quality of a finished lamination cell is improved.
Referring to fig. 3, the laminated sheet band 90 includes: two layers of diaphragm bands 91 are stacked, a first pole piece layer is arranged between the two layers of diaphragm bands 91, an upper second pole piece layer is arranged on the upper surface of the upper layer of diaphragm band 91, and a lower second pole piece layer is arranged on the lower surface of the lower layer of diaphragm band 91. The first pole piece layer includes a plurality of first pole pieces 92 arranged in a linear array (equally spaced) along the length of the laminate tape. The upper second pole piece layer comprises a second pole piece 93 positioned above the first pole piece 92, and a second pole piece 93 is arranged right above each even number bit or odd number bit of the first pole piece 92. The lower second pole piece layer guard position is located the second pole piece 93 under the first pole piece 92, and there is a second pole piece 93 under each odd-numbered or even-numbered first pole piece.
At least on each lamination stage 20 is provided: a first presser 21 and a second presser 22, the first presser 21 and the second presser 22 being provided on both sides of the lamination stage 20 in the circumferential direction of the rotary body 10, respectively, the first presser 21 and the second presser 22 being for pressing the separator band 91 between the adjacent two first pole pieces 92 so that the lamination stage 20 can fold the lamination band 90 to form the laminated cell 100 upon swinging. The laminated cell 100 is structured as shown in fig. 4.
Referring to fig. 5, the first presser 21 and the second presser 22 shown in the drawing are provided with two respectively.
Specifically, the lamination strip 90 is passed through the roll 40 and threaded onto one of the lamination stations 20, and the first presser 21 on that lamination station 20 presses against the separator strip 91 before the first pole piece 92, and the second presser 22 presses against the separator strip 91 between the first pole piece 92 and the second first pole piece 92. If the lamination stage 20 is at the left side of the rotary body 10, the rotary body 10 starts to rotate clockwise around the rotation axis, the swing roller 40 starts to move rightward in the horizontal direction, the lamination stage 20 is driven by the rotary body 10 to rotate clockwise around the rotation axis of the rotary body 10 itself, the swing roller 40 swings to the right side of the rotary body 10, then the second presser finger 22 presses the diaphragm strip 91 between the second first pole piece 92 and the third first pole piece 92, and the first presser finger 21 presses the diaphragm strip 91 between the third first pole piece 92 and the fourth first pole piece 92. Then, the rotating body 10 rotates around the rotating shaft thereof in a counterclockwise direction, the lamination table 20 rotates around the rotating shaft counterclockwise under the driving of the rotating body 10, the swinging roller 40 drives the lamination belt 90 to move leftwards in a horizontal direction, the swinging roller 40 swings to the left side of the rotating body 10, then the first pressing needle 21 presses the diaphragm belt between the fourth first pole piece 92 and the fifth first pole piece 92, and the second pressing needle 22 presses the diaphragm belt between the fifth first pole piece 92 and the sixth first pole piece 92. And the method is repeated until the number of layers is set, so that the finished laminated battery cell 100 is formed.
With continued reference to fig. 1 and 2, a first detection system 60 is provided forward of the front face of the unfolded laminate strip 90 and a second detection system 70 is provided forward of the back face of the unfolded laminate strip 90. The first detection system 60 and the second detection system 70 are both CCD detection systems. The first detection system 60 is configured to detect whether the distances between adjacent second pole pieces 93 on the front surface of the laminated strip 90 are equal, so as to find out the second pole piece 93 whose front surface is offset. The second detection system 70 is configured to detect whether the intervals between adjacent second pole pieces 93 on the back surface of the laminated strip 90 are equal to find out the second pole piece 93 whose back surface is offset.
In this embodiment, lamination station 20 further includes: at least one first presser drive assembly and at least one second presser drive assembly. The first detection system 60 is electrically connected to the first needle punch drive assembly and the second detection system 70 is electrically connected to the second needle punch drive assembly. The first presser driving assembly is used for driving the first presser 21 to press the offset second pole piece 93 to correct the deviation after the first presser 21 presses the diaphragm belt 91, so as to align the stacked upper layer of second pole piece with the next layer of second pole piece. The second presser driving assembly is used for driving the second presser 22 to press the offset second pole piece 93 to correct the deviation after the second presser 22 presses the diaphragm belt 91, so as to align the upper layer of second pole piece with the lower layer of second pole piece. The alignment degree of the laminated battery cells 100 is ensured, and the quality of the finished laminated battery cells is indirectly improved.
In this embodiment, the positions of the first detecting system 60 and the second detecting system 70 are fixed, and the lengths of the lamination belts between the first detecting system 60 and the second detecting system 70 and the lamination table 20 can be considered to be constant, that is, the influence of the swinging roller 40 on the lengths of the lamination belts during swinging and the rotating body 10 during rotation is ignored, and the distances between the first detecting system 60 and the second detecting system 70 and the adjacent two second pole pieces, which are the integral multiples of the distance between the first pole piece and the second pole piece 20, can be set, so that the adjustment of the second pole pieces is facilitated in turn.
When another lamination station adjacent to the lamination station 20 where the battery cells are stacked needs to take the lamination tape and refold the lamination tape 90, the lamination tape needs to be cut off, so the swing lamination machine further comprises: a cutting assembly 30, the cutting assembly 30 is disposed between every two adjacent lamination stations 20, the cutting assembly 30 is used for cutting the lamination belt 90 after one lamination station has stacked the battery cells and is connected with the other lamination station. Before the cutting assembly 30 cuts the lamination strip 90 between adjacent lamination platforms 20, the first pressing needle 21 on the lamination platform 20 connected with the lamination strip 90 clamps the lamination strip 90, so that the lamination strip 90 does not need to be threaded, the operation time is saved, and the production efficiency is further improved.
The swing lamination machine provided in this embodiment further includes: the clamping roller 50, the discharging roller 80 and the driving mechanism are arranged before the swinging roller 40, the discharging roller 80 is arranged before the clamping roller 50, the clamping roller 50 is used for flattening the laminated strip 90, and the discharging roller 80 is used for feeding the rolled laminated strip 90. The driving mechanism is for driving the rotary body 10 to rotate about the rotation axis of the rotary body itself, and is preferably a cam structure.
Referring to fig. 8, the regular polygon shown in the drawing is a square, and lamination stages are provided on four sides of the square, unlike the lamination machine provided with two lamination stages and three lamination stages, the rotation angle of the rotation body is different when the lamination tape is folded to form the lamination cell, and the rotation body 10 can be rotated clockwise or counterclockwise when the tape is attached. Of course, in other embodiments, a different number of lamination stations may be provided, such as five, six, etc.
The swing type lamination machine provided in this embodiment further includes a manufacturing device for manufacturing the lamination belt, where the manufacturing device fixes the free end of the manufactured lamination belt on a lamination table 20 after passing through the discharging rod 80, the clamping rod 50 and the swing rod 40.
In this embodiment, the swing beat of the rotating body can be raised to within 0.25s, that is, one laminated cell is stacked by one swing within 0.25s, so as to achieve the purpose of high-speed lamination.
Embodiment II,
Referring to fig. 9, the present embodiment provides a lamination method of a swing lamination machine according to the first embodiment, including the following steps:
a laminate tape manufacturing step 200 of manufacturing a laminate tape, in particular by thermal compounding, comprising: the membrane strip comprises two layers of membrane strips which are arranged in a laminated manner, a first pole piece layer arranged between the two layers of membrane strips, an upper second pole piece layer arranged on the upper surface of the upper layer of membrane strip, and a lower second pole piece layer arranged on the lower surface of the lower layer of membrane strip. The first pole piece layer comprises a plurality of first pole pieces which are arrayed in a straight line along the length direction of the laminated strip. The upper second pole piece layer comprises a second pole piece positioned right above the first pole piece, and one second pole piece is arranged right above each even-number or odd-number first pole piece. The lower second pole piece layer comprises a second pole piece positioned under the first pole piece, and a second pole piece is arranged under each odd-numbered or even-numbered first pole piece.
A lamination tape folding step 300 of folding the lamination tape along the separator tape between two adjacent first pole pieces to form a lamination cell.
The lamination tape splicing step 400 of splicing the lamination tape to another lamination station adjacent to the lamination station forming the lamination cell and refolding the lamination tape.
The lamination method is specifically implemented by the swing lamination machine in the first embodiment, and the specific working process can be referred to the description in the first embodiment, which is not repeated here.
The embodiment provides a swing type lamination machine and a lamination method, wherein the swing type lamination machine directly rotates to the other lamination stage after the current lamination stage has overlapped the first lamination cell, a pressing needle on the other lamination stage presses a lamination belt, and a cutter cuts off the lamination belt between the two lamination stages. After the first laminated cell is blanked, the second laminated cell is stacked by another lamination station. The process reduces the time for threading and correcting the lamination belt, and further improves the production efficiency. And meanwhile, the two detection systems are matched with two pressing needles to align the pole pieces, so that the quality of the finished laminated battery cell is improved.
The foregoing is a further detailed description of the invention in connection with specific embodiments, and it is not intended that the invention be limited to such description. It will be apparent to those skilled in the art that several simple deductions or substitutions can be made without departing from the spirit of the invention.
Claims (6)
1. A swing lamination machine, comprising:
the rotary body can rotate around the rotating shaft, N lamination platforms are arranged on the circumferential outer wall of the rotary body, are arranged in an array mode around the rotating shaft and are adjacent to each other; the lamination table is used for folding the lamination belt to form lamination cells; n is an integer greater than or equal to 2;
a swing passing roller disposed above the rotating body, the swing passing roller being for conveying the lamination belt to the lamination table, tensioning the lamination belt while laminating;
after the lamination table is connected with the belt, the rotation body drives the lamination table to swing in the circumferential direction through the rotation of the rotation body, so that the lamination belt is folded; after the lamination platform completes lamination, the rotating body is switched to an adjacent lamination platform for lamination through rotation of the rotating body;
after the lamination table is connected with the belt, when the lamination table is positioned on the left side of the rotating body, the rotating body rotates clockwise around the rotating shaft by a first preset angle to enable the lamination table to swing to the right side of the rotating body, and the lamination belt is folded once; when the lamination table is positioned on the right side of the rotating body, the rotating body rotates anticlockwise by a first preset angle around the rotating shaft to enable the lamination table to swing to the left side of the rotating body, and the lamination belt is folded once; multiple folds of the lamination belt are realized by the circulation; after the lamination is completed by one lamination table, when the lamination table is positioned on the left side of the rotating body, the rotating body rotates anticlockwise by a second preset angle around the rotating shaft to enable the next lamination table to be connected with the belt, and when the lamination table is positioned on the right side of the rotating body, the rotating body rotates clockwise by the second preset angle around the rotating shaft to enable the next lamination table to be connected with the belt;
the laminate strip includes: the membrane comprises two layers of membrane strips which are arranged in a stacked manner, a first pole piece layer arranged between the two layers of membrane strips, an upper second pole piece layer arranged on the upper surface of the upper layer of membrane strip, and a lower second pole piece layer arranged on the lower surface of the lower layer of membrane strip; the first pole piece layer comprises a plurality of first pole pieces which are arrayed in a straight line along the length direction of the laminated strip; the upper second pole piece layer comprises a second pole piece positioned right above the first pole piece, and one second pole piece is arranged right above each even-number-bit or odd-number-bit first pole piece; the lower second pole piece layer comprises a second pole piece positioned right below the first pole piece, and one second pole piece is arranged right below each odd-numbered or even-numbered first pole piece;
the lamination bench is at least provided with: a first presser finger and a second presser finger; the first pressing needle and the second pressing needle are respectively arranged on two sides of the lamination table along the circumferential direction of the rotating body; the first pressing needle and the second pressing needle are used for pressing the diaphragm belt between two adjacent first pole pieces so that the lamination belt can be folded when the lamination table swings;
a first detection system is arranged in front of the front surface of the unfolded lamination belt, and a second detection system is arranged in front of the back surface of the unfolded lamination belt; the first detection system is used for detecting whether the distances between every two adjacent second pole pieces on the front surface of the laminated strip are equal or not so as to find out the second pole piece with offset; the second detection system is used for detecting whether the intervals between every two adjacent second pole pieces on the back surface of the laminated strip are equal or not so as to find out the second pole piece which is offset; the lamination station further comprises: at least one first presser finger drive assembly and at least one second presser finger drive assembly; the first needle pressing driving assembly is used for driving the first needle pressing to press the second pole piece which is deviated after the first needle pressing presses the diaphragm belt so as to rectify the deviation; the second needle pressing driving assembly is used for driving the second needle pressing to press the second pole piece which is deviated after the second needle pressing presses the diaphragm belt so as to correct deviation; the first detection system is electrically connected with the first needle pressing driving assembly, and the second detection system is electrically connected with the second needle pressing driving assembly.
2. The swing type lamination machine as defined in claim 1, wherein the swing passing roller moves leftward in a horizontal direction to tension the lamination belt while the rotating body rotates clockwise around the rotating shaft when the lamination table performs lamination; the swing roller moves rightward in a horizontal direction to tension the lamination belt while the rotating body rotates counterclockwise around the rotating shaft.
3. The oscillating laminator of claim 1, further comprising: the cutting assembly is arranged between every two adjacent lamination platforms; the cutting assembly is used for cutting off the lamination belt between adjacent lamination platforms after one lamination platform completes lamination and the adjacent lamination platforms are connected with the belt.
4. The swing type lamination machine as claimed in claim 1, wherein the peripheral outer wall of the rotary body is a regular polygon, the lamination stages are arranged on the sides of the regular polygon, and the number of the lamination stages on one side of the regular polygon is not more than one; the rotating shaft is positioned at the center of the regular polygon; the first preset angle and the second preset angle are angles in a preset angle interval; the preset angle interval comprises an included angle between adjacent lamination platforms.
5. The oscillating laminator of claim 1, further comprising: a grip pass roller disposed before the swing pass roller; the clamping roller is used for flattening the lamination belt.
6. A lamination method based on the swing lamination machine according to any one of claims 1 to 5, characterized by comprising the steps of:
a lamination strip manufacturing step of manufacturing a lamination strip; the laminate strip includes: the membrane comprises two layers of membrane strips which are arranged in a stacked manner, a first pole piece layer arranged between the two layers of membrane strips, an upper second pole piece layer arranged on the upper surface of the upper layer of membrane strip, and a lower second pole piece layer arranged on the lower surface of the lower layer of membrane strip; the first pole piece layer comprises a plurality of first pole pieces which are arrayed in a straight line along the length direction of the laminated strip; the upper second pole piece layer comprises a second pole piece positioned right above the first pole piece, and one second pole piece is arranged right above each even-number-bit or odd-number-bit first pole piece; the lower second pole piece layer comprises a second pole piece positioned right below the first pole piece, and one second pole piece is arranged right below each odd-numbered or even-numbered first pole piece;
a lamination belt folding step, namely folding the lamination belt along a diaphragm belt between two adjacent first pole pieces to form a lamination cell;
and a lamination tape splicing step of splicing the lamination tape with another lamination stage adjacent to the lamination stage forming the lamination cell, and refolding the lamination tape.
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| KR102544744B1 (en) * | 2019-03-12 | 2023-06-16 | 주식회사 엘지에너지솔루션 | Lamination apparatus and method for secondary battery |
| CN112310487A (en) * | 2019-07-31 | 2021-02-02 | 广东利元亨智能装备股份有限公司 | Lamination method |
| CN110943246A (en) * | 2019-10-24 | 2020-03-31 | 深圳吉阳智能科技有限公司 | Circulating compound lamination machine |
| CN110931883B (en) * | 2019-11-29 | 2022-04-29 | 合肥国轩高科动力能源有限公司 | Battery core lamination device |
| CN111354970B (en) * | 2020-04-17 | 2023-03-03 | 湖北亿纬动力有限公司 | Lamination device and lamination method thereof |
| JP7488141B2 (en) * | 2020-07-14 | 2024-05-21 | 株式会社京都製作所 | Stacked cell manufacturing equipment |
| CN112993415B (en) * | 2021-05-08 | 2021-10-15 | 蜂巢能源科技有限公司 | Lamination device and lamination equipment with same |
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