CN112615061B - Preparation method and stacking device of battery cell - Google Patents
Preparation method and stacking device of battery cell Download PDFInfo
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- CN112615061B CN112615061B CN202110035829.5A CN202110035829A CN112615061B CN 112615061 B CN112615061 B CN 112615061B CN 202110035829 A CN202110035829 A CN 202110035829A CN 112615061 B CN112615061 B CN 112615061B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000002131 composite material Substances 0.000 claims abstract description 102
- 238000000034 method Methods 0.000 claims abstract description 48
- 238000004519 manufacturing process Methods 0.000 claims abstract description 34
- 230000008569 process Effects 0.000 claims abstract description 21
- 238000003754 machining Methods 0.000 claims abstract description 4
- 230000007246 mechanism Effects 0.000 claims description 34
- 239000000463 material Substances 0.000 claims description 17
- 230000003014 reinforcing effect Effects 0.000 claims description 15
- 238000013329 compounding Methods 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 8
- 238000010008 shearing Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 2
- 238000003475 lamination Methods 0.000 description 13
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- H01M10/04—Construction or manufacture in general
- H01M10/0404—Machines for assembling batteries
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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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- 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)
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- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The invention belongs to the technical field of batteries, and discloses a preparation method and a stacking device of a battery core, wherein the preparation method of the battery core is used for stacking a plurality of positive plates and a plurality of negative plates to prepare the battery core of the battery, and the preparation method comprises the following steps: providing a plurality of negative pole pieces and a plurality of positive pole composite pole pieces, wherein each positive pole composite pole piece comprises two layers of diaphragms and a positive pole piece arranged between the two layers of diaphragms; stacking the plurality of negative pole pieces and the plurality of positive pole composite pole pieces in the fixture in sequence and alternately to form a stacked battery core; the stacked battery cell in the clamp is compressed to prevent the positive composite pole piece from being separated from the negative pole piece, and the method for stacking the battery cell pole pieces adopts a method for directly stacking the pole pieces, so that the stacking process is simplified, the stacking efficiency is improved, and the production cost of the battery cell is further reduced; this pile up the device and can pile up positive pole composite sheet and negative pole piece in order to make electric core, can greatly promote the machining efficiency of electric core, and then reduce the manufacturing cost of electric core.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a preparation method and a stacking device of a battery core.
Background
With the high-speed development of electronic products, the demand of lithium batteries is higher and higher, and the requirements on the production process and production efficiency of the lithium batteries are higher and higher, in the prior art, a battery core of the lithium battery is formed by stacking a positive plate and a negative plate, so that the lamination process is one of the most important processes in the battery processing and manufacturing process, and because the lamination process is complicated, the lamination efficiency is generally low and needs to be improved; at present, the lamination process generally adopts a Z-shaped lamination method, which is basically formed by stacking a negative plate, a diaphragm and a positive plate from bottom to top in a Z shape. In the Z-shaped lamination method, the negative pole pieces and the positive pole pieces need to be sequentially fed to the lamination platform, so that the lamination speed is low, and the lamination efficiency of the battery core is further influenced.
Disclosure of Invention
The invention aims to provide a preparation method and a stacking device of a battery cell so as to improve the lamination efficiency of the battery cell.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a preparation method of a battery cell, which comprises the following steps:
providing a plurality of negative plates;
providing a plurality of positive composite pole pieces, wherein each positive composite pole piece comprises two layers of diaphragms and a positive plate arranged between the two layers of diaphragms;
sequentially and alternately stacking the plurality of negative pole pieces and the plurality of positive pole composite pole pieces in a clamp to form a stacked battery core;
and compressing the stacked battery cells in the clamp.
The preparation method of the battery cell is used for stacking a plurality of positive pole pieces and a plurality of negative pole pieces to prepare the battery cell of the battery, and comprises the following steps: providing a plurality of negative pole pieces and a plurality of positive pole composite pole pieces, wherein each positive pole composite pole piece comprises two layers of diaphragms and a positive pole piece arranged between the two layers of diaphragms; then, the plurality of negative pole pieces and the plurality of positive pole composite pole pieces are sequentially and alternately stacked in the fixture to form a stacked battery cell, the fixture has a certain prepositioning effect on the plurality of positive pole composite pole pieces and the plurality of negative pole pieces, the alignment degree of the plurality of positive pole composite pole pieces and the plurality of negative pole pieces can be ensured, the neatness of stacking operation is ensured, the stacking quality is improved, and the production quality of the battery cell is further improved; and the stacked battery cell in the clamp is compressed to prevent the positive composite pole piece and the negative pole piece from being separated, and the stacking method of the battery cell pole pieces adopts a method of directly stacking the pole pieces, so that the stacking process is simplified, the stacking efficiency is improved, and the production cost of the battery cell is further reduced.
As a preferable aspect of the above-mentioned method for manufacturing a battery cell, before the step of sequentially and alternately stacking the plurality of negative electrode sheets and the plurality of positive electrode composite electrode sheets in the jig, the method for manufacturing a battery cell further includes the steps of:
and processing the edge of each positive electrode composite pole piece to form a reinforcing structure.
This additional strengthening can increase the intensity at the edge of anodal composite pole piece, has guaranteed that the edge of anodal composite pole piece can not appear buckling or flagging phenomenon, can prevent that the edge of anodal composite pole piece from buckling or flagging because of gravity and the edge clamp of anodal composite pole piece when piling up between two pole pieces, and then has promoted the regularity of piling up the operation.
As a preferable aspect of the above-mentioned method for manufacturing a battery cell, before the step of sequentially and alternately stacking the plurality of negative electrode sheets and the plurality of positive electrode composite electrode sheets in the jig, the method for manufacturing a battery cell further includes the steps of:
providing a plurality of positive plates and two diaphragm belts, compounding the positive plates and the two diaphragm belts into a composite plate belt through a bag making process, and distributing the positive plates between the two diaphragm belts at intervals along the length direction of the diaphragm belts;
and shearing the composite pole piece belt to manufacture a plurality of positive composite pole pieces.
The positive plate is made into the positive composite plate in a bag making mode, so that the lamination operation can be conveniently carried out, and the bag making mode is mature in technology and convenient to operate.
As a preferable scheme of the above method for manufacturing a battery cell, before the step of cutting the composite pole piece strip, the method further includes:
and processing the edge of the compounded pole piece strip to form a reinforcing structure.
This additional strengthening can increase the intensity at the edge in anodal compound utmost point piece area, has guaranteed that the edge in compound utmost point piece area can not appear buckling or flagging phenomenon.
As a preferable embodiment of the above method for manufacturing an electrical core, in the step of compounding the plurality of positive electrode sheets and the two separator tapes into the composite electrode sheet tape by using a bag-making process, in an edge sealing process of compounding the plurality of positive electrode sheets and the two separator tapes into the composite electrode sheet tape, an edge of the separator tape is processed to form a reinforcing structure.
As a preferable mode of the above-mentioned method for manufacturing a battery cell, before the step of compounding a plurality of positive electrode sheets and two separator tapes into a composite electrode sheet tape by a bag-making process, the method further includes:
the edges of each membrane strip are processed to form a reinforcing structure.
As a preferable aspect of the above method for manufacturing an electrical core, the reinforcing structure is a corrugated texture structure.
The wave structure is easy to process.
As a preferable scheme of the above method for manufacturing a battery cell, the steps further include:
and taking out the manufactured battery cell from the bottom of the clamp by using a manipulator.
The battery cell manufactured by the mechanical arm is taken out from the bottom of the clamp, so that the battery cell can be conveniently discharged, and the lamination efficiency is further improved.
As a preferable scheme of the above preparation method of the battery cell, a material taking port is arranged at the bottom of the fixture, a cover plate is arranged on an upper cover of the material taking port, the cover plate is configured to open or close the material taking port, and the manipulator can take out the battery cell from the material taking port under the condition that the cover plate opens the material taking port.
The cover plate on the material taking port can be convenient for opening or closing the material taking port, so that the mechanical arm can take out the battery core.
The invention also provides a stacking device which comprises a clamp, a first clamping mechanism, a second clamping mechanism and a pressing mechanism, wherein a stacking cavity is formed in the clamp, the first clamping mechanism is used for conveying the negative pole pieces to the upper part of the stacking cavity so that the negative pole pieces are stacked in the stacking cavity, and the second clamping mechanism is used for conveying the positive pole composite pole pieces to the upper part of the stacking cavity so that the positive pole composite pole pieces are stacked in the stacking cavity;
the first clamping mechanism and the second clamping mechanism operate alternately to stack the negative pole pieces and the positive pole composite pole pieces in a stacking cavity in sequence and alternately to form stacked battery cells;
the pressing mechanism is used for pressing the stacked battery cell.
The stacking device comprises a clamp, a first clamping mechanism, a second clamping mechanism and a pressing mechanism, wherein a stacking cavity is formed in the clamp, the first clamping mechanism is used for conveying a negative plate to the upper part of the stacking cavity so that the negative plate is stacked in the stacking cavity, and the second clamping mechanism is used for conveying a positive composite plate to the upper part of the stacking cavity so that the positive composite plate is stacked in the stacking cavity; the first clamping mechanism and the second clamping mechanism alternately operate to sequentially and alternately stack the plurality of negative pole pieces and the plurality of positive pole composite pole pieces in the stacking cavity to form a stacked battery cell; the hold-down mechanism is used for compressing tightly the electric core after piling up, uses this device of piling up to pile up positive pole composite sheet and negative pole piece in order to make electric core, can greatly promote the machining efficiency of electric core, and then reduces the manufacturing cost of electric core.
The invention has the beneficial effects that:
the preparation method of the battery core is used for stacking a plurality of positive plates and a plurality of negative plates to prepare the battery core of the battery, and comprises the following steps: providing a plurality of negative pole pieces and a plurality of positive pole composite pole pieces, wherein each positive pole composite pole piece comprises two layers of diaphragms and a positive pole piece arranged between the two layers of diaphragms; then, the plurality of negative pole pieces and the plurality of positive pole composite pole pieces are sequentially and alternately stacked in the clamp to form a stacked battery cell, the clamp has a certain pre-positioning effect on the plurality of positive pole composite pole pieces and the plurality of negative pole pieces, the alignment degree of the plurality of positive pole composite pole pieces and the plurality of negative pole pieces can be ensured, the uniformity of stacking operation is ensured, the stacking quality is improved, and the production quality of the battery cell is further improved; the stacked battery cell in the clamp is compressed to prevent the positive composite pole piece and the negative pole piece from being separated, and the stacking method of the battery cell pole pieces adopts a method of directly stacking the pole pieces, so that the stacking process is simplified, the stacking efficiency is improved, and the production cost of the battery cell is further reduced; the stacking device provided by the invention can stack the positive composite pole piece and the negative pole piece to manufacture the battery cell, can greatly improve the processing efficiency of the battery cell, and further reduces the manufacturing cost of the battery cell.
Drawings
Fig. 1 is a flow chart of a method for manufacturing a battery cell according to the present invention;
FIG. 2 is a schematic diagram of the positive composite pole piece and the negative pole piece stacked in the fixture according to the present invention;
fig. 3 is a schematic view of a composite pole piece strip according to the present invention.
In the figure:
100. a clamp; 101. a stacking chamber;
1. a negative plate; 2. a positive electrode composite pole piece;
21. a diaphragm; 22. and (4) a positive plate.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
In this embodiment, a method for manufacturing a battery core is provided, where a plurality of positive plates and a plurality of negative plates are stacked to manufacture a battery core of a battery, as shown in fig. 1, first, a plurality of negative plates 1 and a plurality of positive composite plates 2 are provided, and each positive composite plate 2 includes two layers of diaphragms 21 and a positive plate 22 disposed between the two layers of diaphragms 21; then, the plurality of negative electrode plates 1 and the plurality of positive electrode composite electrode plates 2 are sequentially and alternately stacked in the fixture 100 to form a stacked electric core (see fig. 2), the fixture 100 has a certain pre-positioning function on the plurality of positive electrode composite electrode plates 2 and the plurality of negative electrode plates 1, the alignment degree of the plurality of positive electrode composite electrode plates 2 and the plurality of negative electrode plates 1 can be ensured, the regularity of the stacking operation is ensured, the stacking quality is improved, and the production quality of the electric core is further improved; and then, the stacked battery cell in the fixture 100 is compressed to prevent the positive composite pole piece 2 from being separated from the negative pole piece 1, and the method for stacking the battery cell pole pieces adopts a method of directly stacking the pole pieces, so that the stacking process is simplified, the stacking efficiency is improved, and the production cost of the battery cell is further reduced.
Before the step of stacking the plurality of negative electrode sheets 1 and the plurality of positive electrode composite electrode sheets 2 in the fixture 100 in sequence, the positive electrode sheet 22 is further required to be made into the positive electrode composite electrode sheet 2, as shown in fig. 3, firstly, a plurality of positive electrode sheets 22 and two diaphragm tapes are provided, the plurality of positive electrode sheets 22 and the two diaphragm tapes are compounded into the composite electrode sheet tape through a bag making process, the plurality of positive electrode sheets 22 are distributed between the two diaphragm tapes at intervals along the length direction of the diaphragm tapes, and then the composite electrode sheet tape is sheared (the dotted line in fig. 3 is the shearing position) to make the plurality of positive electrode composite electrode sheets 2; the technology for preparing the positive electrode composite pole piece 2 by adopting a bag making mode is mature and convenient to operate.
It needs to be mentioned that, when shearing the composite pole piece belt into a plurality of positive composite pole pieces 2, every positive composite pole piece 2 needs to be sheared into the same size to ensure that the working performance of every positive composite pole piece 2 is consistent, and simultaneously, the size of every positive composite pole piece 2 after shearing is the same as the size of every negative pole piece 1, so as to promote the regularity when piling up the operation, and is more beautiful, so that the installation of follow-up electric core.
Because the diaphragm 21 is softer, the edge of the positive composite pole piece 2 can be bent or sagged due to gravity, and the edge of the positive composite pole piece 2 is clamped between the two pole pieces when the positive composite pole piece 2 is stacked, so before the step of sequentially and alternately stacking the negative pole pieces 1 and the positive composite pole pieces 2 in the fixture 100, the edge of each positive composite pole piece 2 needs to be processed to form a reinforcing structure, so that the strength of the edge of the positive composite pole piece 2 is increased, the phenomenon that the edge of the positive composite pole piece 2 is bent or sagged can be avoided, the edge of the positive composite pole piece 2 can be prevented from being clamped between the two pole pieces when the positive composite pole piece 2 is stacked due to gravity bending or sagging, and the neatness of stacking operation is improved.
Alternatively, the reinforcing structure may be machined prior to the step of shearing the composite pole piece strip.
Alternatively, in the step of compounding the plurality of positive electrode sheets 22 and the two separator tapes into the composite electrode sheet tape by the bag-making process, the edges of the separator tapes are processed to form the reinforcing structure in the edge sealing process of compounding the plurality of positive electrode sheets 22 and the two separator tapes into the composite electrode sheet tape.
Alternatively, the edges of each separator strip are processed to form the reinforcing structure before the step of compounding the plurality of positive electrode sheets 22 and the two separator strips into a composite electrode sheet strip by the bag-making process.
Preferably, the reinforcing structure is a corrugated texture structure, the corrugated texture structure is convenient to process, and of course, in order to increase the strength of the edge of the positive electrode composite pole piece 2, the edge of the positive electrode composite pole piece 2 can also be processed into a sawtooth structure or a corrugated structure.
After compressing tightly and making electric core with a plurality of anodal composite pole pieces 2 in anchor clamps 100 and a plurality of negative pole piece 1, in order to promote work efficiency, in this embodiment, use the manipulator to take out the electric core of making from the bottom of anchor clamps 100, so that carry out the unloading operation to electric core, and then promoted the efficiency of lamination, preferably, the bottom of anchor clamps 100 is provided with gets the material mouth, the diameter of getting the material mouth is greater than the diameter of electric core, it is equipped with the apron to get material mouth upper cover, the apron can be opened or close the material mouth of getting (can set up to open or close the material mouth for the apron rotates), so that the manipulator takes out electric core.
Example two
The embodiment provides a stacking device, which comprises a clamp 100, a first clamping mechanism, a second clamping mechanism and a pressing mechanism, wherein a stacking cavity 101 is arranged in the clamp 100, the first clamping mechanism is used for conveying a negative electrode sheet 1 to the upper part of the stacking cavity 101 so as to enable the negative electrode sheet 1 to be stacked in the stacking cavity 101, and the second clamping mechanism is used for conveying a positive electrode composite pole piece 2 to the upper part of the stacking cavity 101 so as to enable the positive electrode composite pole piece 2 to be stacked in the stacking cavity 101; the first clamping mechanism and the second clamping mechanism alternately operate to sequentially and alternately stack the plurality of negative pole pieces 1 and the plurality of positive pole composite pole pieces 2 in the stacking cavity 101 to form a stacked battery core; hold-down mechanism is used for compressing tightly the electric core after piling up, uses this device of piling up to pile up positive pole composite sheet 2 and negative pole piece 1 in order to make electric core, can greatly promote the machining efficiency of electric core, and then reduces the manufacturing cost of electric core.
It is understood that the shape of the stacking cavity may be configured to match the shape of the stacked cells, so as to further ensure the uniformity of the stacked cells.
In the illustrated example, the jig 100 is provided with an introduction passage communicating with the stacking chamber 101. The introduction channel tapers in the direction of the inlet of the stack chamber 101. That is, the area of the cross section of the introduction passage is larger than the area of the cross section of the stack cavity 101. The guide channel has a guiding function on the positive electrode composite pole piece 2 and the negative electrode piece 1 which are stacked, so that the stacking accuracy can be improved.
It should be noted that the structure of the clip in embodiment 2 can refer to the structure of the clip in embodiment 1, and will not be described in detail here.
EXAMPLE III
The embodiment provides a battery cell, which is prepared by adopting the preparation method of the battery cell in the first embodiment and the stacking device in the second embodiment, and the battery cell has the advantages of simple processing technology, high production efficiency and low production cost; the lithium battery manufactured by the battery core has high cost performance.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations, and substitutions will occur to those skilled in the art without departing from the scope of the present invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (6)
1. A preparation method of a battery cell is characterized by comprising the following steps:
providing a plurality of negative electrode sheets (1);
providing a plurality of positive composite pole pieces (2), wherein each positive composite pole piece (2) comprises two layers of diaphragms (21) and a positive plate (22) arranged between the two layers of diaphragms (21);
sequentially and alternately stacking a plurality of negative pole pieces (1) and a plurality of positive pole composite pole pieces (2) in a clamp (100) to form a stacked battery core;
compressing the stacked cells in the fixture (100); the clamp (100) is internally provided with a stacking cavity (101), and the first clamping mechanism is used for conveying the negative pole pieces (1) to the position above the stacking cavity (101) so as to enable the negative pole pieces (1) to be stacked in the stacking cavity (101); the second clamping mechanism is used for conveying the positive composite pole piece (2) to the position above the stacking cavity (101) so that the positive composite pole piece (2) is stacked in the stacking cavity (101); the clamp (100) is provided with an introduction channel communicated with the stacking cavity (101), and the introduction channel gradually changes towards the inlet direction of the stacking cavity (101);
before the step of alternately stacking a plurality of the negative electrode tabs (1) and a plurality of the positive electrode composite electrode tabs (2) in sequence in the jig (100), the preparation method further comprises the steps of: processing the edge of each positive electrode composite pole piece (2) to form a reinforcing structure;
before the step of alternately stacking a plurality of the negative electrode tabs (1) and a plurality of the positive electrode composite electrode tabs (2) in sequence in the jig (100), the preparation method further comprises the steps of:
providing a plurality of positive plates (22) and two diaphragm belts, compounding the positive plates (22) and the two diaphragm belts into a composite plate belt through a bag making process, and distributing the positive plates (22) between the two diaphragm belts at intervals along the length direction of the diaphragm belts;
shearing the composite pole piece strip to manufacture a plurality of positive composite pole pieces (2);
before the step of compounding a plurality of the positive electrode sheets (22) and two separator tapes into a composite electrode sheet tape by a pouch-making process, the production method further includes:
machining the edge of each membrane strip to form a reinforcing structure;
before the step of shearing the composite pole piece strip, the preparation method further comprises the following steps:
and processing the edge of the compounded pole piece strip to form a reinforcing structure.
2. The method for manufacturing the battery cell according to claim 1, wherein in the step of compounding the plurality of positive electrode sheets (22) and the two separator tapes into the composite electrode sheet tape by a bag-making process, edges of the separator tapes are simultaneously processed to form the reinforcing structure during edge sealing of the plurality of positive electrode sheets (22) and the two separator tapes into the composite electrode sheet tape.
3. The method for manufacturing a cell according to any of claims 1-2, wherein the reinforcing structure is a corrugated texture.
4. The method for preparing the battery cell of any one of claims 1-2, wherein the steps further comprise:
the finished cell is removed from the bottom of the fixture (100) using a robot arm.
5. The method for preparing the battery cell according to claim 4, wherein a material taking port is formed at the bottom of the clamp (100), a cover plate is arranged on the material taking port, the cover plate is configured to open or close the material taking port, and the manipulator can take the battery cell out of the material taking port under the condition that the cover plate opens the material taking port.
6. A stacking apparatus for performing the preparation of a battery cell based on the preparation method according to any one of claims 1 to 5, wherein the stacking apparatus comprises a fixture (100), a first clamping mechanism, a second clamping mechanism and a pressing mechanism, the fixture (100) has a stacking cavity (101) therein, the first clamping mechanism is used for conveying a negative electrode sheet (1) above the stacking cavity (101) so as to stack the negative electrode sheet (1) in the stacking cavity (101), and the second clamping mechanism is used for conveying a positive electrode composite electrode sheet (2) above the stacking cavity (101) so as to stack the positive electrode composite electrode sheet (2) in the stacking cavity (101); the clamp (100) is provided with an introduction channel communicated with the stacking cavity (101), and the introduction channel is gradually changed towards the inlet direction of the stacking cavity (101);
the first clamping mechanism and the second clamping mechanism operate alternately to stack a plurality of negative pole pieces (1) and a plurality of positive pole composite pole pieces (2) in a stacking cavity (101) alternately in sequence to form stacked cells;
the pressing mechanism is used for pressing the stacked battery cell.
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| CN202110035829.5A CN112615061B (en) | 2021-01-12 | 2021-01-12 | Preparation method and stacking device of battery cell |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114044347A (en) * | 2021-11-09 | 2022-02-15 | 远景动力技术(江苏)有限公司 | Battery cell stacking system and battery cell stacking deviation rectifying method |
| CN114335741B (en) * | 2021-12-29 | 2023-07-21 | 蜂巢能源科技(无锡)有限公司 | Preparation method and system of battery cell, battery cell and application of battery cell |
| CN114400365B (en) * | 2022-01-27 | 2023-07-14 | 上海兰钧新能源科技有限公司 | Method and device for manufacturing a laminated cell |
| CN114824661A (en) * | 2022-05-11 | 2022-07-29 | 上海兰钧新能源科技有限公司 | Naked electric core and battery |
| CN115101823A (en) * | 2022-07-04 | 2022-09-23 | 深圳吉阳智能科技有限公司 | A method of manufacturing a battery cell |
| CN115207436A (en) * | 2022-08-12 | 2022-10-18 | 上海兰钧新能源科技有限公司 | Cell unit, laminated cell and stacking method |
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