CN112038566A - Preparation method of battery cell and battery cell - Google Patents
Preparation method of battery cell and battery cell Download PDFInfo
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- CN112038566A CN112038566A CN202010772294.5A CN202010772294A CN112038566A CN 112038566 A CN112038566 A CN 112038566A CN 202010772294 A CN202010772294 A CN 202010772294A CN 112038566 A CN112038566 A CN 112038566A
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- die cutting
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- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 238000005520 cutting process Methods 0.000 claims abstract description 94
- 238000010030 laminating Methods 0.000 claims abstract description 11
- 238000004804 winding Methods 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims description 42
- 238000000034 method Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000002356 single layer Substances 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 238000010304 firing Methods 0.000 claims description 5
- 239000010410 layer Substances 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 238000010891 electric arc Methods 0.000 claims description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 6
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 6
- 238000002955 isolation Methods 0.000 abstract description 5
- 238000003672 processing method Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000003698 laser cutting Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 101100460844 Mus musculus Nr2f6 gene Proteins 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0471—Processes of manufacture in general involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis
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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
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention belongs to the technical field of lithium ion batteries, and particularly relates to a preparation method of a battery cell, which comprises the following steps: die cutting is carried out through a die cutting knife die or laser die cutting to obtain a pole piece with a preset shape; die cutting is carried out by a die cutting tool to obtain a tab with a preset shape, and the outer edge of the tab is heated to melt burrs on the outer edge of the tab; or laser die cutting is used for obtaining the tab, and burrs on the outer edge of the tab are heated and melted; the pole lugs and the pole pieces are of an integrated structure or a welded connection structure; and forming the battery core by winding or laminating the pole piece and the diaphragm. Compared with the prior art, the battery terminal lug processing method has the advantages that the outer edge of the lug is heated through the processing mode of laser die cutting or die-cutting by the die-cutting tool, so that burrs on the outer edge of the lug are melted at high temperature, the purpose of removing the burrs is achieved, the risk that the burrs pierce the battery isolation film is reduced, and the use safety performance of the battery is improved. In addition, the invention also provides a battery cell.
Description
Technical Field
The invention belongs to the technical field of lithium ion batteries, and particularly relates to a battery cell and a preparation method thereof.
Background
In recent years, with the continuous popularization of electric automobiles, lithium ion batteries have been developed rapidly, and meanwhile, people pay more and more attention to the safety performance of the lithium ion batteries.
The lithium ion battery is composed of a plurality of components, wherein the tab is one of important components and mainly plays a role in leading current from the pole piece to the pole. Most of the utmost point ear among the prior art sets up the structure into the rectangle, and its edge has the edges and corners, and these edges and corners have certain acutance, pierces through the barrier film easily to lead to mutual electric conduction between positive pole piece and the negative pole piece, and then cause the inside short circuit of battery, arouse the battery from discharging, battery voltage drop, capacity reduce, battery life reduces, can arouse the inside local heating of battery, fire seriously even, influences the security performance of battery. Therefore, a structure for cutting the lug into a fillet is provided in the industry, for example, a lug round-corner cutting device of a lithium battery disclosed in patent number CN204130648U, a linear cutter mold in the prior art is changed into an arc-shaped concave-convex cutter mold, when the lug is cut, the lug is cut into an arc shape through the matching of a convex upper mold and a concave lower mold, although the sharpness of the corner of the lug is reduced, the risk that the corner of the lug directly pierces an isolation film is reduced, and the safety of the lithium ion battery is improved to a certain extent; however, the male upper die and the female lower die are mechanically connected, an assembly gap exists between the male upper die and the female lower die inevitably, when the tab is cut, the tab is easy to deform in the assembly gap area of the male upper die and the female lower die, so that burrs are generated on the cutting edge of the tab, a large amount of burrs are concentrated on the surface of the edge of the tab, the isolation film is still easy to pierce, and a series of safety problems are caused.
In view of the above, there is a need for improvement of the rationality of the above prior art to meet the actual production needs.
Disclosure of Invention
The invention aims to: aiming at the defects of the prior art, the provided preparation method of the battery core effectively solves the problem that burrs are easily generated on the edges of the tabs in the die cutting process, reduces the risk that the burrs pierce the isolating membrane, and improves the safety performance of the battery.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of a battery cell comprises the following steps:
die cutting is carried out through a die cutting knife or laser die cutting to obtain a pole piece with a preset shape;
die cutting is carried out by a die cutting tool to obtain a tab with a preset shape, and the outer edge of the tab is heated to melt burrs on the outer edge of the tab; or directly using laser die cutting to obtain the tab and heating and melting burrs on the outer edge of the tab; the pole lugs and the pole pieces are of an integrated structure or a welding connection structure;
and forming the battery core by winding or laminating the pole piece and the diaphragm.
As an improvement to the method for manufacturing the battery cell of the present invention, the pole piece further includes performing a heating process on the outer edge thereof after being die-cut by the die-cutting rule. After the pole piece is die-cut by using the die-cutting rule, burrs on the outer edge of the pole piece are effectively removed by using heating treatment or laser die-cutting on the pole piece, the risk that the burrs on the pole piece pierce the isolating membrane is reduced, and the safety performance of the battery is further improved.
As an improvement of the method for manufacturing the battery cell in the present invention, the heating treatment is a plasma combustion heating treatment, a laser irradiation heating treatment, an arc heating treatment, an infrared heating treatment, or a microwave heating treatment. In the invention, the burrs are melted by heating the outer edges of the tabs or the pole pieces, so that the outer edges of the tabs or the pole pieces tend to a smoother surface, thereby playing a role in removing the burrs and reducing the risk of puncturing a diaphragm.
As an improvement on the preparation method of the battery cell, the firing temperature of the plasma combustion heating treatment is 600-3000 ℃, and the firing time is 0.01-10 s; the light intensity of the laser irradiation heating treatment is 1-2000 w, and the irradiation time is 0.01-10 s; the working voltage range of the electric arc heating treatment is larger than 50V, and the time for treating the lug is 0.01-30 s.
As an improvement on the preparation method of the battery cell, the laser power of the laser die cutting is 5-5000 w, and the die cutting time of each tab is 0.01-10 s.
As an improvement of the preparation method of the battery core, the outer edges of the tabs and the outer edges of the pole pieces are both formed with processing areas after being subjected to heating processing or laser die cutting. In the invention, the processing area is formed by melting burrs at the edge of the tab through laser die cutting or other heating modes, so that the surface of the processing area is cleaner than the outer edge of the conventional tab after die cutting, and the phenomenon that the burrs pierce the battery isolation film is avoided.
As an improvement to the method of making the cell described in the present invention, the width of the treated area ranges from 0.001mm to 3 mm. The width of the processing area cannot be too large or too small, because the processing area can be heated by firing and other modes, if the width is too large, the fired area is too large, other parts except the outer edge of the tab are also melted at high temperature, the tab is damaged, the normal use of the tab is influenced, and even the electric core is scrapped; in the laser die cutting process, if the width is too small, the width of the laser light is small, the die cutting capability of the laser is reduced, and the die cutting effect is further influenced.
The invention has the beneficial effects that: compared with the prior art, the invention performs die cutting on the lug by the die-cutting tool, and then performs heating treatment on the outer edge of the lug, so that burrs on the outer edge of the lug are melted at high temperature, and the aim of removing the burrs is achieved, thereby reducing the risk of the burrs puncturing the battery isolation film, preventing the internal short circuit of the battery, and improving the use safety performance of the battery.
In addition, the invention also provides a battery cell, which is formed by using the preparation method of the battery cell in any section. The battery cell prepared by the method can effectively improve the safety performance of the battery cell.
The battery cell comprises a tab, the outer edge of the tab is subjected to die cutting by a die cutter or laser to form a chamfer structure, and the chamfer structure is any one or combination of an arc chamfer, a linear chamfer and a polygonal chamfer. The outer edge of the lug is set to be a chamfered structure, so that the sharpness of the outer edge of the lug is reduced, the situation that the outer edge of the lug directly pierces an isolating film is avoided, the risk of short circuit in the battery is reduced, and the safety of the battery is further improved. When the chamfer structure is an arc chamfer, the R angle can be set to be 0.01-30 mm in the invention; when the chamfering structure is a straight line chamfering, the length of the straight line can be set to be 0.01-50 mm, and the range of an angle alpha formed by the straight line chamfering and the horizontal is 30-175 DEG
As an improvement to the battery cell of the present invention, the tab has a single-layer structure or a multi-layer structure. The pole lugs can be in a single-layer or multi-layer structure, and when the pole lugs are in a multi-layer structure, the number of the pole lugs is increased, so that the overall overcurrent capacity of the pole lugs is improved, and the internal resistance of the battery is reduced; when the pole lug is of a single-layer structure, welding of multiple layers of metal sheets is not needed, and certain manufacturing cost is saved.
Drawings
Fig. 1 is a schematic structural diagram of a battery cell according to the present invention;
FIG. 2 is a schematic structural view of a tab with a circular arc chamfer structure according to the present invention;
fig. 3 is a schematic structural view of a tab with a straight chamfer structure according to the present invention;
in the drawings, 1-pole piece; 2-pole ear; 3-a treatment area; w-width of the treatment area; l-length of treatment area.
Detailed Description
The present invention will be described in further detail below with reference to the accompanying drawings, but the present invention is not limited thereto.
As shown in fig. 1 to 3, a method for manufacturing a battery cell includes the following steps:
die cutting is carried out through a die cutting knife or laser die cutting to obtain a pole piece 1 in a preset shape;
die cutting is carried out by a die cutting knife to obtain a pole lug 2 with a preset shape, and the outer edge of the pole lug 2 is heated to melt burrs on the outer edge of the pole lug 2; or directly using laser die cutting to obtain the tab 2 and heating and melting burrs on the outer edge of the tab 2; the tab 2 and the pole piece 1 are of an integrated structure or a welded connection structure;
and (3) forming the battery core by winding or laminating the pole piece 1 and the diaphragm.
In the invention, the tab 2 can be subjected to die cutting by adopting a traditional die cutting tool, and then the outer edge of the tab is heated to melt burrs to form a smooth surface, so that the effect of removing the burrs is achieved, and the phenomenon that the burrs on the tab pierce the battery isolating membrane is prevented; in addition, the tab can also adopt a laser die cutting mode, namely the tab is cut by using laser light, wherein the laser light plays a role of a die cutting rule, the problem that burrs are easily caused on the outer edge of the tab due to assembly gaps in the mechanical die cutting process is solved through laser die cutting, and further, compared with the traditional die cutting rule die cutting mode, the die cutting precision and efficiency of the laser die cutting are improved, meanwhile, the problem that the applicability of die cutting equipment is poor due to battery changing can be solved, and the production cost is saved.
In the preparation method of the battery core provided by the invention, the pole piece 1 can also be subjected to die cutting by adopting laser die cutting or a die cutting cutter, and the heating treatment which is the same as that of the pole lug 2 can be carried out on the outer edge of the pole piece 1 according to the requirement after the die cutting. Wherein, through heat treatment or laser cross cutting can play the effect of cleaing away 1 marginal burr of pole piece equally, further reduce the risk that battery barrier film was punctureed to the burr.
According to the invention, the outer edges of the tab 2 and the outer edges of the pole piece 1 are both provided with the processing areas 3 after being subjected to heating processing or laser die cutting. Because this treatment zone 3 makes the burr at utmost point ear edge melt and form by laser die cutting or other heating methods, consequently, the outer border department of this treatment zone 3's surface after comparing traditional die-cutting rule cross cutting is cleaner and tidier, has avoided the phenomenon that the burr impales battery barrier film.
The width of the processing area 3 cannot be too large or too small, because the processing area 3 can be processed by plasma burning and the like, if the width is too large, the burning area is too large, other parts except the outer edge of the tab 2 are easily melted at high temperature, and further the tab 2 is damaged, the normal use of the tab 2 is influenced, and even the scrapping of a battery cell is caused; in the laser die cutting process, if the width is too small, the width of the laser light is small, the die cutting capability of the laser is reduced, and the die cutting effect is further influenced. In the present invention, the width w of the processing region 3 is set to be in the range of 0.001mm to 3mm, which can achieve the best effect.
The invention also provides a battery cell prepared by the method, the battery cell comprises a tab, the outer edge of the tab 2 is in a chamfer structure, and the chamfer structure is any one or combination of an arc chamfer, a linear chamfer and a polygonal chamfer. The outer edge of the lug 2 is set to be a chamfered structure, so that the sharpness of the outer edge of the lug 2 is reduced, the situation that the outer edge of the lug 2 directly pierces an isolating film is avoided, the risk of short circuit in the battery is reduced, and the safety of the battery is further improved. When the chamfer structure is an arc chamfer, the R angle of the tab 2 can be set to be 0.01-30 mm in the invention; when the chamfering structure is a straight line chamfering, the length l of the straight line can be set to be 0.01-50 mm, and the range of an angle alpha formed by the straight line and the horizontal plane is 30-175 degrees, wherein the range of the angle alpha can be preferentially set to be 90-175 degrees.
In addition, the tab 2 may have a single-layer metal sheet structure or a structure in which a plurality of metal sheets are stacked. The thickness range of each layer of metal sheet is 3-50 mu m, reasonable adaptation can be carried out according to actual production requirements, and when the tab 2 is of a multilayer structure, the number of the tabs 2 is increased, so that the overall overcurrent capacity of the tab 2 is improved, and the internal resistance of the battery is reduced; when the tab 2 is of a single-layer structure, welding of multiple layers of metal sheets is not needed, and certain manufacturing cost is saved.
The present invention will be described in further detail with reference to the following specific examples, which should not be construed as limiting the invention thereto.
Example 1
A preparation method of a battery cell comprises the following steps:
die cutting is carried out by using a die cutting tool to obtain a pole piece 1 and a pole lug 2 in preset shapes, and the pole lug 2 is welded on the pole piece 1;
heating the outer edge of the tab 2 by using oxyhydrogen plasma to heat and melt burrs at the edge of the tab 2, wherein the ignition temperature of oxyhydrogen flame is 1000 ℃, and the ignition time is 3 s;
and (3) forming the battery core by winding or laminating the pole piece 1 and the diaphragm.
In the utility model discloses in, heat utmost point ear 2's outward flange through oxyhydrogen flame to make the burr on 2 outward flanges of utmost point ear melt under high temperature, consequently, reduced the probability of puncturing to the diaphragm, improve the security performance of battery.
Example 2
A preparation method of a battery cell comprises the following steps:
die cutting is carried out by using a die cutting tool to obtain a pole piece 1 and a pole lug 2 in preset shapes, wherein the pole lug 2 and the pole piece 1 are of an integrated structure;
heating the outer edge of the tab 2 by using oxyhydrogen plasma to heat and melt burrs at the edge of the tab 2, wherein the ignition temperature of oxyhydrogen flame is 1000 ℃, and the ignition time is 3 s;
and (3) forming the battery core by winding or laminating the pole piece 1 and the diaphragm.
Different from the embodiment 1, the pole piece 1 and the tab 2 in the embodiment adopt an integrated structure, and the die cutting process can be performed simultaneously, so that the welding procedure of the pole piece 1 and the tab 2 is omitted, and the production efficiency is improved.
Example 3
A preparation method of a battery cell comprises the following steps:
die cutting is carried out by using a die cutting tool to obtain a pole piece 1 and a pole lug 2 in preset shapes, and the pole lug 2 is welded on the pole piece 1;
heating the outer edge of the tab 2 by using oxyhydrogen plasma to heat and melt burrs at the edge of the tab 2, wherein the ignition temperature of oxyhydrogen flame is 1500 ℃, and the ignition time is 2 s;
heating the outer edge of the pole piece 1 by using oxyhydrogen plasma to heat and melt burrs at the edge of the pole lug 2, wherein the ignition temperature of oxyhydrogen flame is 1200 ℃, and the ignition time is 2.5 s;
and (3) forming the battery core by winding or laminating the pole piece 1 and the diaphragm.
Different from the embodiment 1, the embodiment also comprises the step of processing the pole piece 1, so that burrs on the outer edge of the pole piece 1 are eliminated, and the use safety performance of the battery is further improved.
Example 4
A preparation method of a battery cell comprises the following steps:
die cutting is carried out by using a die cutting tool to obtain a pole piece 1 and a pole lug 2 in preset shapes, and the pole lug 2 is welded on the pole piece 1;
carrying out laser irradiation heating on the outer edge of the tab 2 to heat and melt burrs on the edge of the tab 2, wherein the light intensity of laser is 1500w, and the irradiation time is 5 s;
and (3) forming the battery core by winding or laminating the pole piece 1 and the diaphragm.
Compared with the embodiment 1, the embodiment heats by adopting a laser irradiation heating mode, the heating temperature is easier to control, the phenomenon that the tab 2 is damaged due to excessive burning is prevented, and the product quality is improved.
Example 5
A preparation method of a battery cell comprises the following steps:
die cutting is carried out by using a die cutting tool to obtain a pole piece 1 and a pole lug 2 in preset shapes, and the pole lug 2 is welded on the pole piece 1;
processing the outer edge of the tab 2 by using arc heating to ensure that burrs at the edge of the tab 2 are heated and melted, wherein the voltage is 100V, and the processing time is 8 s;
and (3) forming the battery core by winding or laminating the pole piece 1 and the diaphragm.
Compared with the embodiment 1, the outer edge of the tab 2 is processed in an electric arc mode, so that the tab 2 is prevented from being heated, and the damage to the tab 2 is reduced.
Example 6
A preparation method of a battery cell comprises the following steps:
die cutting is carried out by using a die-cutting knife to obtain a pole piece 1;
the method comprises the steps of obtaining the tabs 2 by laser die cutting, wherein the power of laser cutting equipment is 3000w, and the cutting time of each tab 2 is 4 s;
and welding the tab 2 to the pole piece 1, and winding or laminating the pole piece 1 and the diaphragm to form the battery cell.
Different from the embodiment 1, in the embodiment, the tab 2 is cut by adopting a laser die cutting mode, so that burrs are prevented from being generated on the outer edge of the tab 2 due to assembly gaps and the like of the traditional mechanical die cutting equipment, the risk that the diaphragm is punctured is reduced, and the safety performance of the battery is improved.
Example 7
A preparation method of a battery cell comprises the following steps:
using laser to perform die cutting to obtain a pole piece 1 and a pole lug 2, wherein the power of laser cutting equipment is 3000w, and the cutting time of the pole piece 1 and each pole lug is 5s and 4 s;
and (3) forming the battery core by winding or laminating the pole piece 1 and the diaphragm.
Different from the embodiment 1, in the embodiment, the tab 2 and the pole piece 1 are die-cut simultaneously by adopting a laser die-cutting mode, so that the die-cutting efficiency is improved.
Claims (10)
1. The preparation method of the battery cell is characterized by comprising the following steps:
die cutting is carried out through a die cutting knife die or laser die cutting to obtain a pole piece (1) with a preset shape;
die cutting is carried out by a die cutting tool to obtain a pole lug (2) with a preset shape, and the outer edge of the pole lug (2) is heated to melt burrs on the outer edge of the pole lug (2); or directly using laser die cutting to obtain the tab (2) and heating and melting burrs on the outer edge of the tab (2); the pole lug (2) and the pole piece (1) are of an integrated structure or a welding connection structure;
and forming the battery core by winding or laminating the pole piece (1) and the diaphragm.
2. The method for preparing a cell according to claim 1, wherein: the pole piece (1) is subjected to heating treatment on the outer edge after being subjected to die cutting by a die cutting knife.
3. The method for producing a cell according to claim 1 or 2, characterized in that: the heating treatment is plasma combustion heating treatment, laser irradiation heating treatment, arc heating treatment, infrared heating treatment or microwave heating treatment.
4. The method for preparing a cell according to claim 3, wherein: the firing temperature of the plasma combustion heating treatment is 600-3000 ℃, and the firing time is 0.01-10 s; the light intensity of the laser irradiation heating treatment is 1-2000 w, and the irradiation time is 0.01-10 s; the working voltage range of the electric arc heating treatment is larger than 50V, and the treatment time of each lug is 0.01-30 s.
5. The method for preparing a cell according to claim 1, wherein: the laser power of the laser die cutting is 5-5000 w, and the die cutting time of each tab (2) is 0.01-10 s.
6. The method for preparing a cell according to claim 1, wherein: the outer edge of the tab (2) and the outer edge of the pole piece (1) are both provided with a processing area (3) after being subjected to heating processing or laser die cutting.
7. The method for preparing a cell according to claim 6, wherein: the width (w) of the treatment region (3) ranges from 0.001mm to 3 mm.
8. An electric core, its characterized in that: the battery cell is formed by using the preparation method of the battery cell in claims 1-8.
9. The electrical core of claim 8, wherein: the battery cell comprises a tab (2), the outer edge of the tab (2) is of a chamfering structure, and the chamfering structure is any one or combination of an arc chamfering, a linear chamfering and a polygonal chamfering.
10. The electrical core of claim 9, wherein: the tab (2) is of a single-layer structure or a multi-layer structure.
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| CN202010772294.5A CN112038566A (en) | 2020-08-04 | 2020-08-04 | Preparation method of battery cell and battery cell |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115020630A (en) * | 2022-06-23 | 2022-09-06 | 三一技术装备有限公司 | Pole piece and pole piece unit processing method, pole piece, battery and pole lug roller cutting device |
| CN115036139A (en) * | 2022-05-30 | 2022-09-09 | 西安交通大学 | Aluminum foil burr removing method, aluminum foil and application |
| CN115921901A (en) * | 2023-01-09 | 2023-04-07 | 安庆瑞迈特科技有限公司 | Method for removing burrs of 3D printing collimator with assistance of microwaves |
| CN116864626A (en) * | 2023-04-25 | 2023-10-10 | 盐城工学院 | Pole piece treatment process for lithium ion battery |
| WO2024031313A1 (en) * | 2022-08-09 | 2024-02-15 | 宁德新能源科技有限公司 | Electrode sheet, electrochemical apparatus, and electronic device |
| WO2024060680A1 (en) * | 2022-09-19 | 2024-03-28 | 珠海冠宇电池股份有限公司 | Battery electrode sheet, battery cell and battery |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007128297A1 (en) * | 2006-05-09 | 2007-11-15 | Iq Power Licensing Ag | Liquid electrolyte battery heating device comprising a mixing device |
| CN204289591U (en) * | 2014-11-24 | 2015-04-22 | 天能电池集团（安徽）有限公司 | Modified model lead-acid battery terminal |
| CN105070883A (en) * | 2015-07-22 | 2015-11-18 | 深圳市格瑞普电池有限公司 | Electrode piece processing technique for lithium ion battery |
| CN206789613U (en) * | 2017-06-05 | 2017-12-22 | 东莞贵航电池科技有限公司 | A kind of polymer cell polar ear |
-
2020
- 2020-08-04 CN CN202010772294.5A patent/CN112038566A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007128297A1 (en) * | 2006-05-09 | 2007-11-15 | Iq Power Licensing Ag | Liquid electrolyte battery heating device comprising a mixing device |
| CN204289591U (en) * | 2014-11-24 | 2015-04-22 | 天能电池集团（安徽）有限公司 | Modified model lead-acid battery terminal |
| CN105070883A (en) * | 2015-07-22 | 2015-11-18 | 深圳市格瑞普电池有限公司 | Electrode piece processing technique for lithium ion battery |
| CN206789613U (en) * | 2017-06-05 | 2017-12-22 | 东莞贵航电池科技有限公司 | A kind of polymer cell polar ear |
Cited By (6)
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| CN115036139A (en) * | 2022-05-30 | 2022-09-09 | 西安交通大学 | Aluminum foil burr removing method, aluminum foil and application |
| CN115020630A (en) * | 2022-06-23 | 2022-09-06 | 三一技术装备有限公司 | Pole piece and pole piece unit processing method, pole piece, battery and pole lug roller cutting device |
| WO2024031313A1 (en) * | 2022-08-09 | 2024-02-15 | 宁德新能源科技有限公司 | Electrode sheet, electrochemical apparatus, and electronic device |
| WO2024060680A1 (en) * | 2022-09-19 | 2024-03-28 | 珠海冠宇电池股份有限公司 | Battery electrode sheet, battery cell and battery |
| CN115921901A (en) * | 2023-01-09 | 2023-04-07 | 安庆瑞迈特科技有限公司 | Method for removing burrs of 3D printing collimator with assistance of microwaves |
| CN116864626A (en) * | 2023-04-25 | 2023-10-10 | 盐城工学院 | Pole piece treatment process for lithium ion battery |
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