CN110277590B - Lamination method for manufacturing battery cell and battery cell pole group manufacturing equipment - Google Patents
Lamination method for manufacturing battery cell and battery cell pole group manufacturing equipment Download PDFInfo
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- CN110277590B CN110277590B CN201910578756.7A CN201910578756A CN110277590B CN 110277590 B CN110277590 B CN 110277590B CN 201910578756 A CN201910578756 A CN 201910578756A CN 110277590 B CN110277590 B CN 110277590B
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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
- H01M10/052—Li-accumulators
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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
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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
- 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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Abstract
The invention discloses a lamination method for manufacturing a battery cell and equipment for manufacturing a battery cell pole group. According to the lamination method provided by the invention, two diaphragms can be simultaneously laminated, the manufacturing time of the battery core pole group is shortened, the manufacturing efficiency of the battery core pole group is improved, and the manufacturing efficiency of the battery core is improved.
Description
Technical Field
The invention relates to the field of vehicle manufacturing, in particular to a lamination method for manufacturing a battery cell and battery cell pole group manufacturing equipment.
Background
In the related art, with the development of new energy machinery such as new energy automobiles, the application of batteries is more and more extensive. In the field of batteries such as lithium batteries, z-shaped lamination technology is generally adopted when manufacturing a pole group of a battery core, that is, during lamination, a negative pole piece is firstly laminated, then a diaphragm is coated on the negative pole piece, then a positive pole piece is laminated, and then the diaphragm is coated on the positive pole. The lamination unit of the lamination mode is a single pole piece or a single diaphragm, and the speed of the lamination method is low, so that the manufacturing efficiency of the battery cell is low.
Disclosure of Invention
In view of the above, the present invention is directed to a lamination method capable of improving the efficiency of manufacturing a cell electrode assembly at least to some extent.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a lamination method, comprising mounting a positive plate, a negative plate, a first separator and a second separator as a lamination unit, and folding a plurality of the lamination units to make a set of cell pole groups, wherein the mounting of the positive plate, the negative plate, the first separator and the second separator as the lamination unit comprises: the method comprises the steps of oppositely arranging a first diaphragm and a second diaphragm, inserting positive plates between the first diaphragm and the second diaphragm one by one, and arranging negative plates on one side of the first diaphragm, which is far away from the second diaphragm, and on one side of the second diaphragm, which is far away from the first diaphragm.
Further, the mounting of the positive electrode tab, the negative electrode tab, the first separator and the second separator into a lamination unit further includes: and fixing the first diaphragm, the second diaphragm, the positive plate and the negative plate.
Further, the folding and manufacturing a group of battery pole groups by a plurality of the lamination units comprises: a step of providing a pre-crease at a position between two adjacent lamination units.
Further, the folding and manufacturing a group of battery pole groups of a plurality of the lamination units further includes: and folding and clamping a plurality of lamination units into a group of battery pole groups through the pre-folding marks.
Further, the folding and manufacturing a group of battery pole groups of a plurality of the lamination units further includes: and cutting the first diaphragm and the second diaphragm between the two adjacent groups of the battery core electrode groups.
Further, the folding and manufacturing a group of battery pole groups of a plurality of the lamination units further includes: and carrying out diaphragm tail winding and adhesive tape pasting fixation on the cut battery core electrode group.
Compared with the prior art, the lamination method has the following advantages:
1) according to the lamination method provided by the invention, two diaphragms can be simultaneously laminated, the manufacturing time of the battery core pole group is shortened, the manufacturing efficiency of the battery core pole group is improved, and the manufacturing efficiency of the battery core is improved.
Another object of the present invention is to provide a battery cell pole group manufacturing apparatus, including: a positive electrode plate conveying device, a first negative electrode plate conveying device, a second negative electrode plate conveying device, a first diaphragm conveying device and a second diaphragm conveying device, the first diaphragm conveying device and the second diaphragm conveying device are arranged oppositely, the anode plate conveying device is clamped between the first diaphragm conveying device and the second diaphragm conveying device, the first negative electrode plate conveying device is positioned on one side of the first diaphragm conveying device, which is far away from the second diaphragm conveying device, the second negative electrode plate conveying device is positioned on one side of the second diaphragm conveying device, which is far away from the first diaphragm conveying device, the first negative pole plate conveying device and the second negative pole plate conveying device are used for arranging negative pole pieces on one side of the first diaphragm departing from the second diaphragm in a staggered mode and on one side of the second diaphragm departing from the first diaphragm.
Further, the first and second membrane delivery devices each include: the diaphragm unreels the cylinder, anodal polar plate conveyor includes: anodal sheet material unreels cylinder and anodal sheet material cutting, anodal sheet material cutting be used for with anodal sheet material unreels rolls the anodal sheet material that emits and gets into first diaphragm with cut into before between the second diaphragm the positive plate, first negative pole polar plate conveyor with each among the second negative pole polar plate conveyor all includes: the cathode plate material unreels the cylinder and the cathode plate material cuts the piece, the cathode plate material cuts the piece and is used for will the cathode plate material that the cathode plate material unreeled and rolls and emit cuts into the cathode plate.
Further, the cell pole group manufacturing equipment further comprises: a thermal laminating mechanism, the thermal laminating mechanism comprising: the two press rolls are suitable for pressing the first diaphragm, the second diaphragm, the positive plate and the negative plate together, and the heating part is suitable for heating the first diaphragm and the second diaphragm so as to thermally bond and fix the first diaphragm, the second diaphragm, the positive plate and the negative plate.
Further, the cell pole group manufacturing equipment further comprises: the pre-folding mechanism is used for setting pre-folding lines at positions between two adjacent lamination units of the first diaphragm and the second diaphragm, the pre-folding line mechanism comprises a plurality of folding line pieces which are arranged in a staggered mode, wherein the first diaphragm deviates from one side of the second diaphragm and the second diaphragm deviates from one side of the first diaphragm.
Compared with the prior art, the battery cell pole group manufacturing equipment has the following advantages:
1) according to the equipment for manufacturing the battery cell pole group, the two diaphragms can be laminated at the same time, the manufacturing time of the battery cell pole group is shortened, the manufacturing efficiency of the battery cell pole group is improved, and therefore the manufacturing efficiency of the battery cell is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic diagram of lamination performed by using a cell pole group manufacturing apparatus according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a plurality of lamination units according to an embodiment of the present invention.
Description of reference numerals:
the manufacturing equipment of the cell pole group comprises 100 parts of a cell pole group manufacturing device, 1 parts of a positive pole plate conveying device, 11 parts of a positive pole plate unwinding roller, 20 parts of a negative pole plate unwinding roller, 21 parts of a first negative pole plate conveying device, 22 parts of a second negative pole plate conveying device, 30 parts of a diaphragm unwinding roller, 31 parts of a first diaphragm conveying device, 32 parts of a second diaphragm conveying device, 4 parts of a hot laminating mechanism, 41 parts of a press roller, 5 parts of a pre-folding mark mechanism, 51 parts of a crease mark, 6 parts of a clamping manipulator, 200 parts of the cell pole group, 210 parts of a lamination unit, 221 parts of a first diaphragm, 222 parts of a second diaphragm, 231 parts of a positive pole, 232 parts of a negative pole and 240 parts of a pre-folding mark.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The lamination method of the embodiment of the present invention is described below with reference to fig. 1 to 2 in combination with the embodiment.
As shown in fig. 1-2, the lamination method may include mounting a positive electrode sheet 231, a negative electrode sheet 232, a first separator 221, and a second separator 222 into a lamination unit 210, and folding a plurality of lamination units 210 and making a set of cell pole groups 200, wherein mounting the positive electrode sheet 231, the negative electrode sheet 232, the first separator 221, and the second separator 222 into the lamination unit 210 includes: the first separator 221 and the second separator 222 are arranged oppositely, the positive electrode sheets 231 are inserted between the first separator 221 and the second separator 222 one by one, and the negative electrode sheets 232 are arranged alternately on the side of the first separator 221 facing away from the second separator 222 and on the side of the second separator 222 facing away from the first separator 221, that is, after the negative electrode sheet 232 opposite to one positive electrode sheet 231 is arranged on the side of the first separator 221 facing away from the second separator 222, the negative electrode sheet 232 is arranged on the side of the second separator 222 facing away from the first separator 221 at the positive electrode sheet 231 adjacent thereto. Therefore, the lamination method of the invention can simultaneously laminate two diaphragms, and can subsequently fold the lamination unit 210 at one time, so that the manufacturing time of the battery cell pole group 200 is shortened due to the plurality of pole groups, the manufacturing efficiency of the battery cell pole group 200 is improved, and the battery cell manufacturing efficiency is improved.
Specifically, as shown in fig. 1, mounting the positive electrode tab 231, the negative electrode tab 232, the first separator 221, and the second separator 222 as the lamination unit 210 further includes: and fixing the first separator 221, the second separator 222, the positive electrode sheet 231, and the negative electrode sheet 232. Subsequent folding of the lamination unit 210 as a whole to form the cell pole group 200 may thereby be facilitated.
Specifically, as shown in fig. 1-2, a plurality of lamination units 210 are folded and made into a set of cell pole groups 200, including: a step of providing a pre-fold 240 at a position between two adjacent lamination units 210. Therefore, the two subsequent lamination units 210 can be laminated to form the cell pole group 200 through the pre-folding lines 240, and the cell pole group 200 can be accurately and conveniently manufactured.
Specifically, as shown in fig. 1, folding and manufacturing a plurality of lamination units 210 into a set of cell pole groups 200 further includes: a step of folding and clamping the plurality of lamination units 210 into a group of cell pole groups 200 by the pre-folding lines 240 (for example, clamping by the clamping robot 6). Therefore, the cell pole group 200 can occupy a small space.
For example, the clamping robot 6 may clamp the plurality of lamination units 210, compress the plurality of lamination units 210 close to each other, and fold along the pre-folding lines 240, so that the plurality of lamination units 210 may be folded at a time, thereby improving lamination efficiency.
Specifically, as shown in fig. 1, folding and manufacturing a plurality of lamination units 210 into a set of cell pole groups 200 further includes: the step of cutting the first separator 221 and the second separator 222 between the two adjacent sets of cell electrode groups 200 may be performed, for example, by cutting the first separator 221 and the second separator 222 with a tool such as a blade, so as to form a single set of cell assembly.
Specifically, as shown in fig. 1, folding and manufacturing a plurality of lamination units 210 into a set of cell pole groups 200 further includes: and (3) carrying out diaphragm tail winding and rubberizing fixing on the cut battery core electrode group 200. That is, the remaining first diaphragm 221 and the remaining second diaphragm 222 cut on each group of the cell electrode groups 200 are wound outside the group of the cell electrode groups 200, and the remaining first diaphragm 221 and the remaining second diaphragm 222 cut on each group of the cell electrode groups 200 are fixed outside the group of the cell electrode groups 200 by gluing or the like, so that the cell electrode groups 200 occupy a small space, and the diaphragms wound outside the group of the cell electrode groups 200 can protect the lamination units 210 inside the group of the cell electrode groups 200.
A cell pole group manufacturing apparatus 100 of an embodiment of the present invention is described below.
As shown in fig. 1, a battery cell pole group manufacturing apparatus 100 according to an embodiment of the present invention includes: the positive electrode plate conveying device 1 is used for conveying a positive electrode plate 231, the first negative electrode plate conveying device 21 and the second negative electrode plate conveying device 22 are used for conveying a negative electrode plate 232, the first diaphragm conveying device 31 is used for conveying a first diaphragm 221, and the second diaphragm conveying device 32 is used for conveying a second diaphragm 222, the first diaphragm conveying device 31 and the second diaphragm conveying device 32 are oppositely arranged, the positive electrode plate conveying device 1 is clamped between the first diaphragm conveying device 31 and the second diaphragm conveying device 32 so that the positive electrode plate 231 is inserted between the first diaphragm 221 and the second diaphragm 222, the first negative electrode plate conveying device 21 is located on one side, away from the second diaphragm conveying device 32, of the first diaphragm conveying device 31, the second negative electrode plate conveying device 22 is located on one side, away from the first diaphragm conveying device 31, of the second diaphragm conveying device 32, and the first negative electrode plate conveying device 21 and the second negative electrode plate conveying device 22 are used for staggering on one side, away from the second diaphragm conveying device 32, of the first diaphragm 221 A negative electrode sheet 232 is provided on the side of the membrane 222 and on the side of the second membrane 222 facing away from the first membrane 221.
According to the battery cell pole group manufacturing equipment 100 provided by the embodiment of the invention, two diaphragms can be laminated at the same time, and the lamination unit 210 can be folded at one time subsequently, so that the manufacturing time of the battery cell pole group 200 is shortened due to the plurality of battery cell pole groups, the manufacturing efficiency of the battery cell pole group 200 is improved, and the battery cell manufacturing efficiency is improved.
Specifically, as shown in fig. 1, the first and second membrane delivery devices 31 and 32 each include: the separator unwinding roller 30 for unwinding the separator, the positive electrode plate conveying device 1 includes: positive plate material unreeling roller 11 and positive plate material cutting piece, positive plate material cutting piece (for example, blade) is used for getting into between first diaphragm 221 and the second diaphragm 222 positive plate material that the positive plate material unreeled and rolled and emit and preceding cutting becomes positive plate 231, and each in first negative pole polar plate conveyor 21 and the second negative pole polar plate conveyor 22 all includes: a negative electrode sheet material unwinding roller 20 and a negative electrode sheet material cutting member (e.g., a blade) for cutting the negative electrode sheet material unwound from the negative electrode sheet material unwinding roller into negative electrode sheets 232. Therefore, the lamination unit 210 can be mounted without arranging a mechanical claw to clamp and transport the positive plate 231 or the negative plate 232, the occupied space of the battery cell pole group manufacturing equipment 100 is saved, and the manufacturing cost is reduced.
Specifically, as shown in fig. 1, the cell pole group manufacturing apparatus 100 further includes: hot laminating mechanism 4, hot laminating mechanism 4 includes: the pressing device comprises two pressing rollers 41 and a heating part, wherein the two pressing rollers 41 are suitable for pressing the first separation film 221, the second separation film 222, the positive electrode sheet 231 and the negative electrode sheet 232 together, and the heating part is suitable for heating the first separation film 221 and the second separation film 222 to enable the surfaces of the first separation film 221 and the second separation film 222 to be heated and to be increased in viscosity, so that the first separation film 221, the second separation film 222, the positive electrode sheet 231 and the negative electrode sheet 232 are fixed in a thermal bonding mode. This ensures a secure connection between the individual components of the lamination unit, and in particular the heating section may be an electrical heating wire which can be wound around or fixed to at least one pressure roller 41.
Specifically, as shown in fig. 1, the cell pole group manufacturing apparatus 100 further includes: a pre-creasing mechanism 5 for providing a pre-crease 240 to the first membrane 221 and the second membrane 222 at a position between two adjacent lamination units 210, the pre-creasing mechanism 5 comprising a plurality of creasing members 51, the plurality of creasing members 51 being arranged alternately on a side of the first membrane 221 facing away from the second membrane 222 and on a side of the second membrane 222 facing away from the first membrane 221. Thereby, the first diaphragm 221 and the second diaphragm 222 can be uniformly stressed at both sides of the pre-folding mark 240. The creased member 51 may be a cylindrical steel body (e.g., iron block) without a pointed end.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A lamination process for cell fabrication, comprising: mounting a positive plate, a negative plate, a first diaphragm and a second diaphragm into a lamination unit, and folding a plurality of lamination units to form a group of battery core electrode groups;
wherein, install positive plate, negative pole piece, first diaphragm and second diaphragm into lamination unit, include: arranging a first diaphragm and a second diaphragm oppositely, inserting positive plates between the first diaphragm and the second diaphragm one by one, and arranging negative plates on one side of the first diaphragm, which is far away from the second diaphragm, and one side of the second diaphragm, which is far away from the first diaphragm;
the folding and making a set of electric core pole group of a plurality of the lamination unit includes: a step of providing a pre-crease at a position between two adjacent lamination units;
wherein the pre-creasing step comprises: the pre-folding marks are arranged on one side, away from the second diaphragm, of the first diaphragm, and the pre-folding marks are arranged on the side, away from the first diaphragm, of the second diaphragm, and the pre-folding marks on the first diaphragm and the pre-folding marks on the second diaphragm are arranged in a staggered mode;
folding and clamping a plurality of lamination units into a group of battery pole groups through the pre-folding marks;
install positive plate, negative pole piece, first diaphragm and second diaphragm into lamination unit, still include: and fixing the first diaphragm, the second diaphragm, the positive plate and the negative plate.
2. The lamination method for cell fabrication according to claim 1, wherein the folding and forming a plurality of the lamination units into a set of cell pole groups further comprises: and folding and clamping a plurality of lamination units into a group of battery pole groups through the pre-folding marks.
3. The lamination method for cell fabrication according to claim 2, wherein the folding and forming a plurality of the lamination units into a set of cell pole groups further comprises: and cutting the first diaphragm and the second diaphragm between the two adjacent groups of the battery core electrode groups.
4. The lamination method for cell fabrication according to claim 3, wherein the folding and forming a plurality of the lamination units into a set of cell pole groups further comprises: and carrying out diaphragm tail winding and adhesive tape pasting fixation on the cut battery core electrode group.
5. A cell pole group manufacturing apparatus, comprising: a positive electrode plate conveying device, a first negative electrode plate conveying device, a second negative electrode plate conveying device, a first diaphragm conveying device and a second diaphragm conveying device, the first diaphragm conveying device and the second diaphragm conveying device are arranged oppositely, the anode plate conveying device is clamped between the first diaphragm conveying device and the second diaphragm conveying device, the first negative electrode plate conveying device is positioned on one side of the first diaphragm conveying device, which is far away from the second diaphragm conveying device, the second negative electrode plate conveying device is positioned on one side of the second diaphragm conveying device, which is far away from the first diaphragm conveying device, the first negative electrode plate conveying device and the second negative electrode plate conveying device are used for arranging negative plates on one side of the first diaphragm, which is far away from the second diaphragm, in a staggered mode and on one side of the second diaphragm, which is far away from the first diaphragm;
further comprising: a pre-creasing mechanism for pre-creasing the first and second membranes at a location between adjacent two lamination units, the pre-creasing mechanism comprising a plurality of creasing members disposed alternately on a side of the first membrane facing away from the second membrane and on a side of the second membrane facing away from the first membrane;
and a plurality of lamination units are folded and clamped into a group of battery cell pole groups through the pre-folding marks.
6. The cell pole group manufacturing apparatus of claim 5, wherein the first membrane delivery device and the second membrane delivery device each comprise: the diaphragm unreels the cylinder, anodal polar plate conveyor includes: anodal sheet material unreels cylinder and anodal sheet material cutting member, anodal sheet material cutting member be used for with anodal sheet material unreels rolls the anodal sheet material that emits and gets into first diaphragm with cut into the positive plate before between the second diaphragm, first negative pole polar plate conveyor with each among the second negative pole polar plate conveyor all includes: the cathode plate material unreels the cylinder and the cathode plate material cuts the piece, the cathode plate material cuts the piece and is used for will the cathode plate material that the cathode plate material unreeled and rolls and emit cuts into the cathode plate.
7. The cell pole group manufacturing apparatus of claim 5, wherein the thermal lamination mechanism comprises: the two press rolls are suitable for pressing the first diaphragm, the second diaphragm, the positive plate and the negative plate together, and the heating part is suitable for heating the first diaphragm and the second diaphragm so as to thermally bond and fix the first diaphragm, the second diaphragm, the positive plate and the negative plate.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910578756.7A CN110277590B (en) | 2019-06-28 | 2019-06-28 | Lamination method for manufacturing battery cell and battery cell pole group manufacturing equipment |
| PCT/CN2020/098589 WO2020259693A1 (en) | 2019-06-28 | 2020-06-28 | Lamination method used for battery cell fabrication and battery cell electrode group fabrication device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910578756.7A CN110277590B (en) | 2019-06-28 | 2019-06-28 | Lamination method for manufacturing battery cell and battery cell pole group manufacturing equipment |
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| CN110277590A CN110277590A (en) | 2019-09-24 |
| CN110277590B true CN110277590B (en) | 2022-04-12 |
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| CN114583284A (en) * | 2022-03-08 | 2022-06-03 | 蜂巢能源科技股份有限公司 | Lamination equipment |
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