CN108878988B - Lamination area, lamination area preparation equipment and lamination equipment - Google Patents
Lamination area, lamination area preparation equipment and lamination equipment Download PDFInfo
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- CN108878988B CN108878988B CN201810715301.0A CN201810715301A CN108878988B CN 108878988 B CN108878988 B CN 108878988B CN 201810715301 A CN201810715301 A CN 201810715301A CN 108878988 B CN108878988 B CN 108878988B
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- 238000003475 lamination Methods 0.000 title claims abstract description 61
- 238000002360 preparation method Methods 0.000 title description 4
- 238000004519 manufacturing process Methods 0.000 claims abstract description 33
- 238000007789 sealing Methods 0.000 claims description 66
- 239000012528 membrane Substances 0.000 claims description 59
- 238000013329 compounding Methods 0.000 claims description 25
- 239000002131 composite material Substances 0.000 claims description 21
- 238000003825 pressing Methods 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 18
- 150000001875 compounds Chemical class 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000012797 qualification Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007306 turnover Effects 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
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
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- 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)
- Laminated Bodies (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a lamination belt, lamination belt manufacturing equipment and lamination equipment, wherein the lamination belt comprises: at least two layers of diaphragm belts are arranged in a layer-by-layer manner, and a row of pole pieces which are arranged in an array manner along the length direction of the diaphragm belts are arranged between every two adjacent layers of diaphragm belts; the diaphragm belt and the pole pieces are compounded into a whole, and the positions of the diaphragm belts, which are positioned between the adjacent pole pieces in the same row, are heat-sealed together. In the lamination belt, the diaphragms at the positions between the adjacent pole pieces in each row are heat-sealed together, and in subsequent processing, the diaphragms are not easy to separate and fold, and the formed finished battery cell is not easy to have short circuit, so that the qualification rate of the product is improved.
Description
Technical Field
The application relates to the technical field of laminated battery cores, in particular to a laminated belt, laminated belt manufacturing equipment and laminated equipment.
Background
The production process of the battery core of the lithium ion battery mainly comprises a thermal composite lamination process and a bag-making lamination process.
In the thermal compounding lamination process, the positive electrode sheet and the negative electrode sheet (or one of them) cut into sheets are preheated together with two continuous separator layers, and then are compounded into a compounding unit by a compounding roller. The thickness of the composite unit is equal to the sum of the thickness of the two layers of diaphragms and the thickness of the two pole pieces (or one pole piece), the thickness of the diaphragm at the interval between the two composite units is equal to the sum of the thickness of the two layers of diaphragms, and due to the difference between the thickness of the composite unit and the thickness of the diaphragm at the interval between the two composite units and the geometric position relationship formed by the diameter of the composite roller and the interval between the two composite units, the composite roller can not completely press the two layers of diaphragms between the two composite units to roll and compound, and when a single composite unit is cut off for lamination in the later procedure, the diaphragm which is not compounded at the edge of the composite unit can possibly appear turnover, and finally the cell is short-circuited, so that the qualification rate of the cell is affected.
In the bag-making lamination process, the cut pole pieces and the continuous diaphragms are simultaneously made into bags through a bag-making mechanism, a certain gap is reserved between the two bags after the paper bags, the paper bags are cut off at the gap during subsequent lamination to form a lamination unit, and then the lamination units are stacked to form the battery cell.
Accordingly, there is a need for improvement and advancement in the art.
Disclosure of Invention
The utility model aims at providing a lamination area, lamination area preparation equipment and lamination equipment, make the diaphragm heat-seal be in the same place, the phenomenon of diaphragm separation, fold is difficult for appearing.
According to a first aspect of the present application, there is provided a laminated strip comprising: at least two layers of diaphragm belts are arranged in a layer-by-layer manner, and a row of pole pieces which are arranged in an array manner along the length direction of the diaphragm belts are arranged between every two adjacent layers of diaphragm belts; the diaphragm belt and the pole pieces are compounded into a whole, and the positions of the diaphragm belts, which are positioned between the adjacent pole pieces in the same row, are heat-sealed together.
The laminated strip further comprises a row of pole pieces arranged on the upper surface of the uppermost layer of diaphragm strip in an array manner along the length direction of the diaphragm strip, and/or a row of pole pieces arranged on the lower surface of the lowermost layer of diaphragm strip in an array manner along the length direction of the diaphragm strip.
The laminated strip is characterized in that the positions of two rows of pole pieces adjacent to each other up and down are symmetrical relative to the diaphragm strip, and the spacing between the pole pieces in the same row is the same; the pole pieces in the same row have the same polarity, and the polarities of the pole pieces in the upper row and the lower row are opposite.
According to a second aspect of the present application, there is provided a laminated tape making apparatus comprising:
the feeding device is used for outputting at least two layers of laminated diaphragm belts to the compounding device, and pole pieces are put between two adjacent layers of diaphragm belts at regular intervals and output to the compounding device along with the diaphragm belts;
the compounding device is used for compounding the diaphragm belt and the pole piece output by the feeding device into a whole;
and the heat sealing device is used for heat-sealing the membrane strips together, and the heat-sealing position is the position of each membrane strip between the adjacent pole pieces of the same layer.
The lamination tape making apparatus, wherein the heat sealing device comprises: a first heat seal mechanism and a second heat seal mechanism; the distance between the first heat sealing mechanism and the second heat sealing mechanism is greater than or equal to the length of the pole piece; the first heat sealing mechanism and the second heat sealing mechanism are arranged on the compound device or arranged at the output end of the compound device.
The lamination belt manufacturing equipment comprises a lamination belt manufacturing device, a lamination belt manufacturing device and a lamination belt manufacturing device, wherein the lamination belt manufacturing device comprises a pressing plate and a driving mechanism; the driving mechanism drives the pressing plate to press the pole piece and each layer of diaphragm belt; the first heat sealing mechanism and the second heat sealing mechanism comprise heat sealing knives and heating components for heating the heat sealing knives; the heat sealing knife of the first heat sealing mechanism and the heat sealing knife of the second heat sealing mechanism are respectively arranged on two sides of the pressing plate.
The laminated strip manufacturing equipment further comprises a driving device for driving the diaphragm strip and the pole piece to be transmitted backwards.
The laminated tape manufacturing apparatus, wherein the composite device comprises: a heating mechanism for heating the diaphragm belt and a pair of composite rollers; the composite roller is used for carrying out rolling and compositing on the heated diaphragm belt and the pole piece; the first heat sealing mechanism and the second heat sealing mechanism are arranged at the output end of the compound device.
The lamination tape manufacturing equipment is characterized in that the width of each heat seal is 50um-100um, and the width direction of the heat seal is the length direction of the diaphragm tape.
According to a third aspect of the present application, there is provided a lamination apparatus comprising the lamination tape making apparatus.
The beneficial effects of the invention are as follows:
in lamination area, lamination area preparation equipment and lamination equipment that this application provided, lamination area includes: at least two layers of diaphragm belts are arranged in a layer-by-layer manner, and a row of pole pieces which are arranged in an array manner along the length direction of the diaphragm belts are arranged between every two adjacent layers of diaphragm belts; the diaphragm belt and the pole pieces are compounded into a whole, and the positions of the diaphragm belts, which are positioned between the adjacent pole pieces in the same row, are heat-sealed together. In the lamination belt, the diaphragms are heat-sealed at the positions between the adjacent pole pieces in each row, so that the diaphragms are not separated and folded in subsequent processing, and the formed finished battery cell is not easy to have a short circuit phenomenon, and the qualification rate of the product is improved.
Drawings
FIG. 1 is a schematic view of a laminated strip according to the present invention;
FIG. 2 is a block diagram of a laminated tape manufacturing apparatus according to the present invention;
FIG. 3 is a schematic view of a laminated tape manufacturing apparatus according to the present invention;
FIG. 4 is a schematic view of another construction of the laminated tape manufacturing apparatus provided by the present invention;
FIG. 5 is a schematic illustration of a heat seal formed by the laminate strip made by the apparatus of FIG. 3;
fig. 6 is a schematic illustration of a heat seal formed by the laminate strip made by the apparatus of fig. 4.
Detailed Description
It should be noted that, without conflict, the embodiments and features of the embodiments in the present application may be combined with each other.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art in a specific case.
The present application is described in further detail below with reference to the accompanying drawings by way of specific embodiments.
Embodiment 1,
The present embodiment provides a laminated sheet tape including: the membrane strip that at least two-layer set up and set up a row of pole pieces of arranging along membrane strip length direction array between two-layer adjacent membrane strip, all be provided with a row of pole pieces of arranging along membrane strip length direction array between every two-layer adjacent membrane strip promptly, the pole pieces evenly arranges with the form of interval the same distance between every two-layer adjacent membrane strip.
Further, a row of pole pieces arranged in an array along the length direction of the diaphragm belt can be arranged on the upper surface of the uppermost diaphragm belt, or a row of pole pieces arranged in an array along the length direction of the diaphragm belt can be arranged on the lower surface of the lowermost diaphragm belt. In the embodiment, at least two layers of diaphragm belts and each row of pole pieces are compounded into a whole, and the positions, between the adjacent pole pieces in the same row, of each layer of diaphragm belt are heat-sealed together, namely, each layer of diaphragm belt is positioned at the position between the adjacent pole pieces in the same row, the upper and lower layers of diaphragms of the pole pieces in the same row are heat-sealed together, or the upper and lower layers of diaphragms of the pole pieces in the same row are heat-sealed together with the edges of the pole pieces in the row, so that after a laminated battery cell is manufactured in the subsequent step, the diaphragms positioned at the edges of the pole pieces are not separated and folded, and further, the phenomenon of short circuit of the laminated battery cell is not caused, and the qualification rate of products is improved.
Specifically, referring to fig. 1, the membrane strips are arranged at least two layers, a row of pole pieces arranged at equal intervals and arranged between adjacent membrane strips, a row of pole pieces arranged at equal intervals and arranged on the upper surface of the uppermost membrane strip, and a row of pole pieces arranged at equal intervals and arranged on the lower surface of the lowermost membrane strip, for convenience of description, the uppermost membrane strip is called an upper membrane strip 10, the lowermost membrane strip is called a lower membrane strip 20, a row of pole pieces 30 arranged along the length direction of the membrane strip and arranged between the upper membrane strip 10 and the lower membrane strip 20, a row of pole pieces arranged along the length direction of the membrane strip and arranged on the upper surface of the upper membrane strip 10, and a row of pole pieces arranged along the length direction of the membrane strip and arranged on the lower surface of the lower membrane strip 20 are also arranged. The pole piece arranged on the upper surface of the upper diaphragm belt 10 and the pole piece arranged on the lower surface of the lower diaphragm belt 20 can be optionally arranged, and can be set according to actual production requirements.
In this embodiment, taking three layers of base materials of the pole piece 30 disposed between the upper diaphragm belt 10 and the lower diaphragm belt 20 as an example, the pole pieces 30 disposed between the upper diaphragm belt 10 and the lower diaphragm belt 20 are uniformly arranged in an array along the length direction of the two diaphragm belts, and the positions between two adjacent pole pieces, that is, the upper diaphragm belt 10 and the lower diaphragm belt 20 at the position a in fig. 1 are heat-sealed together, or the upper diaphragm belt 10 and the lower diaphragm belt 20 at the position a are heat-sealed together with the edges of the pole pieces 30 at the position a, so that the diaphragm belts will not be separated or wrinkled after the laminated battery cells are formed in the subsequent process.
With continued reference to fig. 1, the positions of the two rows of pole pieces adjacent to each other are symmetrical with respect to the diaphragm belt, and the pole pieces in the same row have the same spacing. That is, a row of pole pieces on the upper surface of the upper diaphragm band 10 and a row of pole pieces between the upper diaphragm band 10 and the lower diaphragm band 20 are symmetrical with respect to the upper diaphragm band 10, a row of pole pieces on the lower surface of the lower diaphragm band 20 and a row of pole pieces between the upper diaphragm band 10 and the lower diaphragm band 20 are symmetrical with respect to the lower diaphragm band 20, and the intervals between adjacent pole pieces on each row are the same. For convenience in subsequent processing, the spacing between adjacent pole pieces in each row is the same, and the first pole piece in an adjacent row is positioned in a consistent manner with respect to the separator strip between adjacent rows, resulting in the structure shown in fig. 1.
In this embodiment, two layers of membrane belts, a row of pole pieces arranged on the upper surface of an upper layer of membrane belt, a row of pole pieces arranged between two layers of membrane belts, and a row of pole pieces arranged on the lower surface of a lowest layer of membrane belt are taken as examples for explanation, the pole pieces in the same row have the same polarity, and the polarities of the two adjacent rows of pole pieces are opposite. Namely, the polarity of each of the pole pieces in the upper surface of the upper diaphragm band 10, the pole pieces in the upper surface of the upper diaphragm band 10 and the lower diaphragm band 20, and the pole pieces in the lower surface of the lower diaphragm band 20 is the same, but the polarity of the pole pieces in the upper surface of the diaphragm band 10, the pole pieces in the upper surface of the upper diaphragm band 10 and the lower diaphragm band 20, and the pole pieces in the lower surface of the lower diaphragm band 20, which are adjacent to each other, is opposite to each other. If the electrode plates on the upper surface of the upper diaphragm belt 10 are all positive electrode plates, the electrode plates between the upper diaphragm belt 10 and the lower diaphragm belt 20 are all negative electrode plates, and the electrode plates on the lower surface of the lower diaphragm belt 20 are all positive electrode plates.
In another embodiment, the polarities of the electrode plates in each row of electrode plates can be set at intervals, that is, the upper surface of the upper diaphragm belt 10 is sequentially provided with an anode electrode plate, a cathode electrode plate, an anode electrode plate and a cathode electrode plate, the anode electrode plate, the cathode electrode plate and the cathode electrode plate are sequentially arranged between the upper diaphragm belt 10 and the lower diaphragm belt 20, the lower surface of the lower diaphragm belt 20 is sequentially provided with the anode electrode plate, the cathode electrode plate, the anode electrode plate and the cathode electrode plate, and the like, so that the polarity intervals of the electrode plates in each row are different, the polarities of the adjacent electrode plates in the lamination direction of the diaphragm belt are also different, the arranged diaphragm belt and the electrode plates are heat-sealed according to the position (namely, the position A) of the adjacent electrode plates, and then the finished laminated electrode plate is processed by the subsequent process, and the subsequent process can be any production mode capable of manufacturing the laminated electrode core. The polarity setting of each row of pole pieces can be set according to the actual production requirement so as to meet the different production requirements.
Embodiment II,
The embodiment provides lamination tape manufacturing equipment, which is particularly used for manufacturing the lamination tape in the first embodiment. Referring to fig. 2, the laminated tape manufacturing apparatus includes: feeding device 100, compounding device 200 and heat sealing device 300. The feeding device 100 is configured to output at least two layers of laminated membrane strips to the composite device 200, and put pole pieces between two adjacent layers of membrane strips at regular intervals, where the pole pieces are output to the composite device 200 along with the membrane strips; the compounding device 200 is used for compounding the diaphragm belt and the pole piece output by the feeding device 100 into a whole to form a structure shown in fig. 1; the heat sealing device 300 is used for heat sealing the membrane strips together, and the heat sealing position is located at the position between the adjacent pole pieces of the same layer on the membrane strips, namely the position A shown in fig. 1, after the membranes at the position are heat sealed together, the membrane at the edge of the pole piece is not easy to edge and fold, and after the membrane is processed into a laminated cell in the subsequent process, the phenomenon of short circuit of the battery is avoided.
In this embodiment, the feeding device 100 is further used to put pole pieces on the upper surface of the uppermost membrane strip at regular intervals or put pole pieces on the lower surface of the lowermost membrane strip at regular intervals according to the actual production requirement. For facilitating the need for subsequent processing, the time of placement of the pole pieces in each row is consistent, and the starting time of the pole pieces placed in each row for the first time is consistent, to form the structure shown in fig. 1.
For convenience of description, the following embodiments will be described by taking the feeding device 100 for feeding two layers of membrane strips, and placing a row of pole pieces between the two layers of membrane strips and on the upper surface of the uppermost layer of membrane strip, or placing a row of pole pieces between the two layers of membrane strips only, and referring to the two layers of membrane strips as an upper membrane strip 10 and a lower membrane strip 20, respectively, and the pole pieces between the upper membrane strip 10 and the lower membrane strip 20 as negative pole pieces, and the pole pieces on the upper surface of the upper membrane strip 10 as positive pole pieces.
In one embodiment, referring to fig. 3, the feeding device 100 includes: positive electrode unwinding mechanism 130, upper separator tape unwinding mechanism 110, negative electrode unwinding mechanism 140, lower separator tape unwinding mechanism 120, blanking mechanism 150, pick-and-place robot (not shown), upper pull roll 160, and lower pull roll 170. The positive electrode unreeling mechanism 130 is used for releasing the positive electrode pole piece coiled material; the upper membrane strip unreeling mechanism 110 is used for releasing the upper membrane strip 10; the negative electrode unreeling mechanism 140 is used for releasing the negative electrode pole piece coiled material; the lower membrane strip unreeling mechanism 120 is used to release the lower membrane strip 20; the blanking mechanism 150 is respectively arranged at the output ends of the positive electrode unreeling mechanism 130 and the negative electrode unreeling mechanism 140, and is used for cutting the positive electrode pole piece into positive electrode pole pieces by fixed length and cutting the negative electrode pole piece into Cheng Fuji pole pieces by fixed length; the taking and placing manipulator is used for placing the positive pole piece on the upper surface of the upper diaphragm belt 10 at intervals, and placing the negative pole piece between the upper diaphragm belt 10 and the lower diaphragm belt 20 at intervals; the upper traction roller 160 and the lower traction roller 170 act together to draw the positive electrode sheet, the upper diaphragm belt 10, the negative electrode sheet and the lower diaphragm belt 20 to the compounding device 200, and the positive electrode sheet, the upper diaphragm belt 10, the negative electrode sheet and the lower diaphragm belt 20 are compounded into a whole by the compounding device 200 in a thermal compounding or pressing mode.
In another embodiment, referring to fig. 4, a feeding device 100 includes: an upper separator band unwind mechanism 110, a negative electrode roll unwind mechanism 130, a lower separator band unwind mechanism 120, a blanking mechanism 150, an upper pull roll 160, and a lower pull roll 170. The upper membrane strip unreeling mechanism 110 is used for releasing the upper membrane strip 10; the negative electrode unreeling mechanism 140 is used for releasing the negative electrode pole piece coiled material; the lower membrane strip unreeling mechanism 120 is used to release the lower membrane strip 20; the blanking mechanism 150 is arranged at the output end of the negative electrode unreeling mechanism 140 and is used for cutting Cheng Fuji the rolled negative electrode piece to a fixed length; the upper traction roller 160 and the lower traction roller 170 act together to draw the upper separator band 10, the negative electrode tab and the lower separator band 20 to the combining device 200, and the upper separator band 10, the negative electrode tab and the lower separator band 20 are combined into a whole by the combining device 200 through a thermal combining or pressing manner.
In one embodiment, referring to fig. 3, a composite device 200 includes: a heating mechanism for heating the diaphragm belt and a pair of composite rollers, wherein the heating mechanism comprises an upper heating assembly 210 and a lower heating assembly 220, and the upper heating assembly 210 and the lower heating assembly 220 are respectively arranged above and below the diaphragm belt and are used for simultaneously heating the upper surface and the lower surface of the diaphragm belt; the pair of compounding rollers comprises an upper compounding roller 230 and a lower compounding roller 240 which are arranged up and down symmetrically, and the upper compounding roller 230 and the lower compounding roller 240 are respectively positioned above and below the heated diaphragm belt and are used for carrying out rolling compounding on the heated diaphragm belt and the pole piece. In this embodiment, the heat sealing device 300 is provided at the output end of the complex apparatus 200, that is, the heat sealing device 300 is provided at the output ends of the upper complex roller 230 and the lower complex roller 240.
In another embodiment, the composite device 200 shown in fig. 4 includes: the pressing plate and the driving mechanism (not shown in the figure) drive the pressing plate to press the pole piece and each layer of diaphragm belt. The pressing plate comprises an upper pressing plate 260 and a lower pressing plate 270, the driving mechanism comprises an upper driving assembly and a lower driving assembly, the upper driving assembly is used for driving the upper pressing plate 260 to move downwards to be close to the top surface of the diaphragm belt, the lower driving assembly is used for driving the lower pressing plate 270 to move upwards to be close to the bottom surface of the diaphragm belt, and meanwhile the upper pressing plate 260 and the lower pressing plate 270 close to the diaphragm belt work together to press the pole piece and each layer of diaphragm belt, so that the diaphragm belt and the pole piece are pressed into a whole. The heat sealing device 300 is disposed on one side of the upper platen 260 adjacent to the lamination belt, or on one side of the lower platen 270 adjacent to the lamination belt, or on both platens adjacent to the lamination belt, the heat sealing device 300 is disposed.
The laminated strip manufacturing equipment provided by the embodiment further comprises: a drive (not shown) for driving the separator strip and pole piece rearward comprises a first pull roll 280 and a second pull roll 290 disposed at the output end of the platen, the first pull roll 280 and the second pull roll 290 being configured to provide a continuous forward movement of the separator strip and pole piece pressed together.
Referring to fig. 3 and 4, the heat sealing apparatus 300 includes: the first heat-seal mechanism 310 and the second heat-seal mechanism 320, wherein each of the first heat-seal mechanism 310 and the second heat-seal mechanism 320 includes a heat-seal knife and a heating assembly for heating the heat-seal knife. If the heat sealing device 300 is disposed at the output end of the complex device 200, the heat sealing knife of the first heat sealing mechanism 310 and the heat sealing knife of the second heat sealing mechanism 320 are disposed at the output ends of the upper complex roller 230 and the lower complex roller 240, respectively. If the heat sealing device 300 is disposed on the complex device 200, the heat sealing knives of the first heat sealing mechanism 310 and the heat sealing knives of the second heat sealing mechanism 320 are disposed on both sides of the pressing plate, that is, the heat sealing knives of the first heat sealing mechanism 310 and the heat sealing knives of the second heat sealing mechanism 320 are disposed on one side of the upper pressing plate 260 and the lower pressing plate 270 near the lamination belt, respectively.
In this embodiment, the distance between the first heat-sealing mechanism 310 and the second heat-sealing mechanism 320 is greater than or equal to the length of the pole piece, that is, the distance between the heat-sealing knife of the first heat-sealing mechanism 310 and the heat-sealing knife of the second heat-sealing mechanism 320 is greater than or equal to the length of the pole piece. Referring to fig. 5 and 6, the heat-seal knife of the first heat-seal mechanism 310 and the heat-seal knife of the second heat-seal mechanism 320 form a heat-seal of 50um-100um in width L between the adjacent pole pieces in the same row (at the a position shown in fig. 3 and 4), and the width direction of the heat-seal (width of the heat-seal) is the length direction of the separator tape. The width of the heat seal is determined by the width of the knife edges of the heat seal knives of the first heat seal mechanism 310 and the heat seal knives of the second heat seal mechanism 320.
Third embodiment,
The present embodiment provides a lamination apparatus including the lamination tape manufacturing apparatus in the second embodiment, and the lamination tape manufacturing apparatus manufactures the lamination tape in the first embodiment, and the lamination tape may be manufactured into the lamination cell by any lamination method in the lamination apparatus.
If two layers of diaphragm bands are formed, negative electrode plates are arranged at the same distance between the two layers of diaphragm bands, and the adjacent negative electrode plates are heat-sealed together through heat sealing to form the diaphragm bands and the electrode plates. In lamination equipment, the lamination belt is sequentially folded into a Z-shaped structure at the position of each adjacent negative pole piece, then the positive pole piece is inserted into a gap of the Z-shaped structure, and then the lamination belt with the Z-shaped structure inserted with the positive pole piece is pressed to form the lamination belt.
Another lamination mode is to set pole pieces with polarity intervals at equal distances in two layers of laminated diaphragm bands, for example: the positive pole piece, the negative pole piece, positive pole piece are the right side, form it into an organic whole, heat-seal between adjacent pole pieces again, the same Z style of calligraphy structure that forms because in this mode, the polarity of pole piece is the interval setting, consequently, only need take the lamination of this Z style of calligraphy structure to pressfitting can make lamination electricity core.
Of course, the manner in which the laminated cells are formed is not limited to the above two ways, and is not described herein.
In summary, in the laminated tape, the laminated tape manufacturing apparatus, and the laminated apparatus provided in this embodiment, the laminated tape includes: at least two layers of diaphragm belts are arranged in a layer-by-layer manner, and a row of pole pieces which are arranged in an array manner along the length direction of the diaphragm belts are arranged between every two adjacent layers of diaphragm belts; the diaphragm belt and the pole pieces are compounded into a whole, and the positions of the diaphragm belts, which are positioned between the adjacent pole pieces in the same row, are heat-sealed together. In the lamination belt, the diaphragms are heat-sealed at the positions between the adjacent pole pieces in each row, so that the diaphragms are not separated and folded in subsequent processing, and the formed finished battery cell is not easy to have a short circuit phenomenon, and the qualification rate of the product is improved.
The foregoing is a further detailed description of the present application in connection with the specific embodiments, and it is not intended that the practice of the present application be limited to such descriptions. It will be apparent to those skilled in the art from this disclosure that several simple deductions or substitutions can be made without departing from the inventive concepts of the present application.
Claims (10)
1. A laminate tape, comprising: at least two layers of diaphragm belts are arranged in a layer-by-layer manner, and a row of pole pieces which are arranged in an array manner along the length direction of the diaphragm belts are arranged between every two adjacent layers of diaphragm belts; the diaphragm belts and the pole pieces are compounded into a whole, and the positions of the diaphragm belts between the adjacent pole pieces in the same row are heat-sealed together, or the positions of the diaphragm belts between the adjacent pole pieces in the same row are heat-sealed together with the edges of the pole pieces.
2. The laminate strip of claim 1, further comprising a row of pole pieces disposed on an upper surface of the uppermost separator strip and arrayed along the length of the separator strip, and/or a row of pole pieces disposed on a lower surface of the lowermost separator strip and arrayed along the length of the separator strip.
3. The laminated strip of claim 2, wherein the positions of the upper and lower adjacent rows of pole pieces are symmetrical about the membrane strip, and the pole pieces of the same row are equally spaced; the pole pieces in the same row have the same polarity, and the polarities of the pole pieces in the upper row and the lower row are opposite.
4. A laminate tape manufacturing apparatus, comprising:
the feeding device is used for outputting at least two layers of laminated diaphragm belts to the compounding device, and pole pieces are put between two adjacent layers of diaphragm belts at regular intervals and output to the compounding device along with the diaphragm belts;
the compounding device is used for compounding the diaphragm belt and the pole piece output by the feeding device into a whole;
and the heat sealing device is used for heat-sealing the membrane strips together, wherein the heat-sealing position is the position of each membrane strip between the adjacent pole pieces of the same layer, or is the position between the adjacent pole pieces of the same row and the edge of the pole piece.
5. The laminate tape manufacturing apparatus of claim 4, wherein said heat sealing device comprises: a first heat seal mechanism and a second heat seal mechanism; the distance between the first heat sealing mechanism and the second heat sealing mechanism is greater than or equal to the length of the pole piece; the first heat sealing mechanism and the second heat sealing mechanism are arranged on the compound device or arranged at the output end of the compound device.
6. The laminate tape manufacturing apparatus of claim 5, wherein said compounding device comprises a platen and a drive mechanism; the driving mechanism drives the pressing plate to press the pole piece and each layer of diaphragm belt; the first heat sealing mechanism and the second heat sealing mechanism comprise heat sealing knives and heating components for heating the heat sealing knives; the heat sealing knife of the first heat sealing mechanism and the heat sealing knife of the second heat sealing mechanism are respectively arranged on two sides of the pressing plate.
7. The laminate tape manufacturing apparatus of claim 6, further comprising drive means for driving the membrane tape and pole piece back transport.
8. The laminate tape manufacturing apparatus of claim 5, wherein said compounding device comprises: a heating mechanism for heating the diaphragm belt and a pair of composite rollers; the composite roller is used for carrying out rolling and compositing on the heated diaphragm belt and the pole piece; the first heat sealing mechanism and the second heat sealing mechanism are arranged at the output end of the compound device.
9. The laminate tape manufacturing apparatus of claim 4, wherein each heat seal has a width of 50um to 100um, and the width direction of the heat seal is the length direction of the separator tape.
10. Lamination apparatus comprising a lamination tape making apparatus as claimed in any one of claims 4 to 9.
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| CN112297577A (en) * | 2019-07-31 | 2021-02-02 | 广东利元亨智能装备股份有限公司 | Diaphragm composite device |
| CN112864475B (en) * | 2021-03-08 | 2023-01-03 | 扬州大学 | Cell thermal composite lamination unit edge diaphragm composite device |
| CN113611912B (en) * | 2021-06-15 | 2023-07-07 | 万向一二三股份公司 | Lamination structure of electrode assembly, preparation method and electrochemical device |
| CN113594532B (en) * | 2021-08-03 | 2022-12-27 | 蜂巢能源科技有限公司 | Battery cell, preparation method and system thereof, and secondary battery |
| CN113921916B (en) * | 2021-09-29 | 2023-07-21 | 蜂巢能源科技有限公司 | Lamination device and lamination method for battery cells |
| CN115132964B (en) * | 2022-08-30 | 2022-11-25 | 楚能新能源股份有限公司 | Lithium battery pole piece substrate and pole piece manufacturing method |
| CN116706256B (en) * | 2023-08-04 | 2023-12-08 | 苏州赛腾精密电子股份有限公司 | Battery pole piece lamination method |
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