CN110931705A - Method for improving strength of pole piece of square lithium ion battery after Mark hole punching - Google Patents
Method for improving strength of pole piece of square lithium ion battery after Mark hole punching Download PDFInfo
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- CN110931705A CN110931705A CN201911160108.6A CN201911160108A CN110931705A CN 110931705 A CN110931705 A CN 110931705A CN 201911160108 A CN201911160108 A CN 201911160108A CN 110931705 A CN110931705 A CN 110931705A
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- mark
- mark hole
- punching
- pole piece
- lithium ion
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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
-
- 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
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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
Abstract
The invention provides a method for improving the strength of a pole piece of a square lithium ion battery after being punched with a Mark hole, and relates to the technical field of electric power. The method for improving the strength of the pole piece of the square lithium ion battery after the Mark hole is drilled comprises the following steps: s1, drawing a cutting drawing line of the lithium ion battery for punching Mark holes on two sides, wherein the round grooves of the Mark holes are arranged on the edges of the tabs (when the punching drawing line of the Mark holes is drawn, the drawing line is drawn by laser drawing software); s6 timely removing the waste materials generated in the processing process, avoiding being sucked into the punching holes and avoiding causing processing deviation. The method can adjust program parameters through steps of S2, S3 and the like, changes the punching mode of the parallel positions of the two sides of the pole piece into staggered punching of the two sides, has certain difference of specific optimized lower limit, and has higher tensile strength depending on the identification capability of a winder on the size of the Mark hole, so that the method can achieve the aim of preventing the belt breakage during the punching of the Mark hole.
Description
Technical Field
The invention relates to the technical field of marking a Mark hole on a lithium ion battery, in particular to a method for improving the strength of a pole piece of a square lithium ion battery after the Mark hole is marked.
Background
In recent years, the new energy industry is rapidly developed, and a lithium ion power battery is widely applied to various industries such as automobiles, ships, forklifts, energy storage and the like as a clean and efficient novel energy source due to the advantages of high working voltage, large specific energy, long cycle life, no pollution and the like of a single battery, wherein a square lithium ion battery is a very important and common type.
This kind of battery structure mainly comprises apron, aluminum hull and inside book core and auxiliary component etc. wherein roll up the core and mainly make up together with certain law by positive pole piece and negative pole piece and diaphragm, and then form the battery with apron subassembly and casing welding, wherein roll up the mode of core combination and roughly can divide into coiling formula and lamination formula combination mode, compare in lamination formula, it is easy that coiling formula rolls up the core has the mechanization, and speed is very fast, and the homogeneity is more guaranteed, does benefit to a great deal of advantages such as large-scale production.
However, the winding type has high requirements on the strength and uniformity of the pole pieces, otherwise, the risk of tape breakage is easy to occur in the manufacturing process, the tape splicing is very troublesome after the tape breakage, the time consumption is long, and the production efficiency is seriously influenced.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for improving the strength of a pole piece of a square lithium ion battery after a Mark hole is punched, and the purpose of preventing the strip from being broken when the Mark hole is punched is achieved.
(II) technical scheme
In order to achieve the purpose of preventing the belt from being broken when the Mark hole is drilled, the invention provides the following technical scheme: a method for improving the strength of a pole piece of a square lithium ion battery after being punched with a Mark hole comprises the following steps:
s1, pre-optimizing the raw material, taking out burrs, bulges or other impurities which affect the Mark hole processing on the surface, then placing the impurities on a processing machine for fixing, and preparing for processing;
s2, drawing a cutting drawing line of the lithium ion battery for punching Mark holes on two sides, wherein the round grooves of the Mark holes are arranged on the edges of the tabs (when the punching drawing line of the Mark holes is drawn, the drawing line is drawn by laser drawing software);
s3, optimizing the size of the original Mark hole to 3mm by 5mm (the lower limit of specific optimization may have a certain difference and depends on the Mark hole size identification capability of a winding machine, and the smaller the size is, the higher the tensile strength of the pole piece is);
s4, adjusting program parameters, and changing the punching mode of the parallel positions at the two sides of the pole piece into staggered punching at the two sides;
s5, adjusting program parameters to enable waste materials generated by cutting Mark holes and tabs to be kept into an integral waste material block;
s6, writing a program, importing the drawn drawing and the program into a working device together, and then issuing an instruction and implementing the instruction;
and S7, timely removing the waste materials generated in the processing process, avoiding being sucked into the punching holes and avoiding causing processing deviation.
Preferably, the further cutting tool for selecting the Mark hole is a laser galvanometer cutter.
Preferably, the shape of the Mark hole is a combination of a rectangle and a semicircle, a trapezoid, a triangle or a square.
Preferably, the waste material produced during the Mark hole processing is in a shape of a thin strip bulge.
(III) advantageous effects
Compared with the prior art, the invention provides a method for improving the strength of a pole piece of a square lithium ion battery after being punched with a Mark hole, which has the following beneficial effects:
1. the method can adjust program parameters through steps of S2, S3 and the like, changes the punching mode of the parallel positions of the two sides of the pole piece into staggered punching of the two sides, reduces the concentration ratio of weak links, and the specific staggered distance can be determined according to the processing equipment and the tensile effect of the pole piece, and the specific optimized lower limit can have a certain difference, and the lower size is smaller and the higher tensile strength is higher depending on the size recognition capability of a winding machine on the Mark hole, so that the method can achieve the purpose of preventing the strip breakage during the Mark hole punching.
2. The invention can ensure that the waste material does not influence the processing of the later step by the processing of the steps of S3, S4, S5 and the like, and can avoid the damage of the raw material by avoiding the damage of the Mark hole processing, thereby knowing that the invention can be more practical and more convenient.
Drawings
FIG. 1 is a schematic diagram of a Mark hole machining structure in the invention;
FIG. 2 is a schematic view of the processing sequence of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, a method for improving the strength of a pole piece of a square lithium ion battery after being punched with Mark holes includes the following steps:
s1, pre-optimizing the raw material, taking out burrs, bulges or other impurities which affect the Mark hole processing on the surface, then placing the impurities on a processing machine for fixing, and preparing for processing;
s2, drawing a cutting drawing line of the lithium ion battery for punching Mark holes on two sides, wherein the round grooves of the Mark holes are arranged on the edges of the tabs (when the punching drawing line of the Mark holes is drawn, the drawing line is drawn by laser drawing software);
s3, optimizing the size of the original Mark hole to 3mm by 5mm (the lower limit of specific optimization may have a certain difference and depends on the Mark hole size identification capability of a winding machine, and the smaller the size is, the higher the tensile strength of the pole piece is);
s4, adjusting program parameters, and changing the punching mode of the parallel positions at the two sides of the pole piece into staggered punching at the two sides;
s5, adjusting program parameters to enable waste materials generated by cutting Mark holes and tabs to be kept into an integral waste material block;
s6, writing a program, importing the drawn drawing and the program into a working device together, and then issuing an instruction and implementing the instruction;
s7, timely removing waste materials generated in the machining process to avoid being sucked into the punching holes and avoid causing machining deviation;
the further cutting tool for selecting the Mark hole is a laser galvanometer cutter;
the shape of the Mark hole is a combination of a rectangle with a semicircle, a trapezoid, a triangle or a square;
the waste material during the Mark hole processing is in a thin strip convex shape;
the first embodiment is as follows: a method for improving the strength of a pole piece of a square lithium ion battery after being punched with a Mark hole comprises the following steps:
s1, pre-optimizing the raw material, taking out burrs, bulges or other impurities which affect the Mark hole processing on the surface, then placing the impurities on a processing machine for fixing, and preparing for processing;
s2, drawing a cutting drawing line of the lithium ion battery for punching Mark holes on two sides, wherein the round grooves of the Mark holes are arranged on the edges of the tabs (when the punching drawing line of the Mark holes is drawn, the drawing line is drawn by laser drawing software);
s3, optimizing the size of the original Mark hole to 3mm by 5mm (the lower limit of specific optimization may have a certain difference and depends on the Mark hole size identification capability of a winding machine, and the smaller the size is, the higher the tensile strength of the pole piece is);
s4, adjusting program parameters, and changing the punching mode of the parallel positions at the two sides of the pole piece into staggered punching at the two sides;
s5, adjusting program parameters to enable waste materials generated by cutting Mark holes and tabs to be kept into an integral waste material block;
s6, writing a program, importing the drawn drawing and the program into a working device together, and then issuing an instruction and implementing the instruction;
s7, timely removing waste materials generated in the machining process to avoid being sucked into the punching holes and avoid causing machining deviation;
the further cutting tool for selecting the Mark hole is a laser galvanometer cutter;
the shape of the Mark hole is triangular;
the waste material during the Mark hole processing is in a thin strip convex shape;
example two: a method for improving the strength of a pole piece of a square lithium ion battery after being punched with a Mark hole comprises the following steps:
s1, pre-optimizing the raw material, taking out burrs, bulges or other impurities which affect the Mark hole processing on the surface, then placing the impurities on a processing machine for fixing, and preparing for processing;
s2, drawing a cutting drawing line of the lithium ion battery for punching Mark holes on two sides, wherein the round grooves of the Mark holes are arranged on the edges of the tabs (when the punching drawing line of the Mark holes is drawn, the drawing line is drawn by laser drawing software);
s3, optimizing the size of the original Mark hole to 3mm by 5mm (the lower limit of specific optimization may have a certain difference and depends on the Mark hole size identification capability of a winding machine, and the smaller the size is, the higher the tensile strength of the pole piece is);
s4, adjusting program parameters, and changing the punching mode of the parallel positions at the two sides of the pole piece into staggered punching at the two sides;
s5, adjusting program parameters to enable waste materials generated by cutting Mark holes and tabs to be kept into an integral waste material block;
s6, writing a program, importing the drawn drawing and the program into a working device together, and then issuing an instruction and implementing the instruction;
s7, timely removing waste materials generated in the machining process to avoid being sucked into the punching holes and avoid causing machining deviation;
the further cutting tool for selecting the Mark hole is a laser galvanometer cutter;
the shape of the Mark hole is a body shape;
the waste material during the Mark hole processing is in a thin strip convex shape;
example three: a method for improving the strength of a pole piece of a square lithium ion battery after being punched with a Mark hole comprises the following steps:
s1, pre-optimizing the raw material, taking out burrs, bulges or other impurities which affect the Mark hole processing on the surface, then placing the impurities on a processing machine for fixing, and preparing for processing;
s2, drawing a cutting drawing line of the lithium ion battery for punching Mark holes on two sides, wherein the round grooves of the Mark holes are arranged on the edges of the tabs (when the punching drawing line of the Mark holes is drawn, the drawing line is drawn by laser drawing software);
s3, optimizing the size of the original Mark hole to 3mm by 5mm (the lower limit of specific optimization may have a certain difference and depends on the Mark hole size identification capability of a winding machine, and the smaller the size is, the higher the tensile strength of the pole piece is);
s4, adjusting program parameters, and changing the punching mode of the parallel positions at the two sides of the pole piece into staggered punching at the two sides;
s5, adjusting program parameters to enable waste materials generated by cutting Mark holes and tabs to be kept into an integral waste material block;
s6, writing a program, importing the drawn drawing and the program into a working device together, and then issuing an instruction and implementing the instruction;
s7, timely removing waste materials generated in the machining process to avoid being sucked into the punching holes and avoid causing machining deviation;
the further cutting tool for selecting the Mark hole is a laser galvanometer cutter;
the shape of the Mark hole is trapezoidal;
the waste material during the Mark hole processing is in a thin strip convex shape.
The method for improving the strength of the pole piece after the Mark hole is punched on the square lithium ion battery can adjust the program parameters through the steps of S2, S3 and the like, change the punching mode of the parallel positions at the two sides of the pole piece into the staggered punching mode at the two sides, reduce the concentration ratio of weak links, and the specific staggered distance can be determined according to the processing equipment and the tensile effect of the pole piece, and the specific optimized lower limit may have a certain difference, depending on the Mark hole size recognition capability of the winding machine, the smaller the size is, the higher the tensile strength of the pole piece is, therefore, the invention can achieve the aim of preventing the belt from being broken when the Mark hole is punched, and through the processing of the steps of S3, S4, S5 and the like, thereby ensuring that the waste material does not influence the processing of the following steps in the Mark hole processing, avoiding the damage in the Mark hole processing, thereby avoiding damage to the raw material, so that it can be understood that the invention can be more practical and convenient.
The operating mechanism of traditional cross cutting machine: the utility model discloses a die-cutting machine carries out intermittent type nature according to the pole piece length of electricity core design and beats Mark hole, the general Mark hole of traditional old-fashioned mechanical die-cutting machine is located the pole piece middle or is close to the position at edge, 3mm 13mm can generally be accomplished to trompil external dimension, but old-fashioned die-cutting machine is because system stability is poor, the mould needs the periodic replacement preparation, and slowly to be eliminated by the trade with high costs, the substitute is newfashioned laser die-cutting machine, through laser cutting, the Mark hole generally is located pole piece border position, general 5mm 8mm, but the broken tape of easy very much, in addition the mode that present cross-cutting generally punches for bipolar plate both sides parallel position simultaneously, the risk of broken tape has been increased more.
In summary, the method for improving the strength of the pole piece after the Mark hole is punched on the square lithium ion battery can adjust the program parameters through the steps of S2, S3 and the like, change the punching mode of the parallel positions at the two sides of the pole piece into the staggered punching mode at the two sides, reduce the concentration of weak links, and the specific staggered distance can be determined according to the processing equipment and the tensile effect of the pole piece, and the specific optimized lower limit may have a certain difference, depending on the Mark hole size recognition capability of the winding machine, the smaller the size is, the higher the tensile strength of the pole piece is, therefore, the invention can achieve the aim of preventing the belt from being broken when the Mark hole is punched, and through the processing of the steps of S3, S4, S5 and the like, thereby ensuring that the waste material does not influence the processing of the following steps in the Mark hole processing, avoiding the damage in the Mark hole processing, thereby avoiding damage to the raw material, so that it can be understood that the invention can be more practical and convenient.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A method for improving the strength of a pole piece of a square lithium ion battery after being punched with a Mark hole is characterized by comprising the following steps: the method comprises the following steps:
s1, pre-optimizing the raw material, taking out burrs, bulges or other impurities which affect the Mark hole processing on the surface, then placing the impurities on a processing machine for fixing, and preparing for processing;
s2, drawing a cutting drawing line of the lithium ion battery for punching Mark holes on two sides, wherein the round grooves of the Mark holes are arranged on the edges of the tabs (when the punching drawing line of the Mark holes is drawn, the drawing line is drawn by laser drawing software);
s3, optimizing the size of the original Mark hole to 3mm by 5mm (the lower limit of specific optimization may have a certain difference and depends on the Mark hole size identification capability of a winding machine, and the smaller the size is, the higher the tensile strength of the pole piece is);
s4, adjusting program parameters, and changing the punching mode of the parallel positions at the two sides of the pole piece into staggered punching at the two sides;
s5, adjusting program parameters to enable waste materials generated by cutting Mark holes and tabs to be kept into an integral waste material block;
s6, writing a program, importing the drawn drawing and the program into a working device together, and then issuing an instruction and implementing the instruction;
and S7, timely removing the waste materials generated in the processing process, avoiding being sucked into the punching holes and avoiding causing processing deviation.
2. The method for improving the strength of the pole piece of the square lithium ion battery after being punched with the Mark hole according to claim 1, wherein the method comprises the following steps: and the further cutting tool for selecting the Mark hole is a laser galvanometer cutter.
3. The method for improving the strength of the pole piece of the square lithium ion battery after being punched with the Mark hole according to claim 1, wherein the method comprises the following steps: the shape of the Mark hole is a rectangle combined with a semicircle, a trapezoid, a triangle or a square.
4. The method for improving the strength of the pole piece of the square lithium ion battery after being punched with the Mark hole according to claim 1, wherein the method comprises the following steps: the waste material during the Mark hole processing is in a thin strip convex shape.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911160108.6A CN110931705A (en) | 2019-11-23 | 2019-11-23 | Method for improving strength of pole piece of square lithium ion battery after Mark hole punching |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911160108.6A CN110931705A (en) | 2019-11-23 | 2019-11-23 | Method for improving strength of pole piece of square lithium ion battery after Mark hole punching |
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| CN110931705A true CN110931705A (en) | 2020-03-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115780634A (en) * | 2022-09-23 | 2023-03-14 | 宁德时代新能源科技股份有限公司 | Pole piece pore-forming method, device, electronic equipment, storage medium and system |
| CN115842098A (en) * | 2022-08-05 | 2023-03-24 | 宁德时代新能源科技股份有限公司 | Pole piece, battery monomer, battery, electric device and pole piece manufacturing device |
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| EP2631971B1 (en) * | 2012-02-24 | 2019-08-14 | GS Yuasa International Ltd. | Electrode plate, wound electrode group, and cylindrical battery |
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| EP2631971B1 (en) * | 2012-02-24 | 2019-08-14 | GS Yuasa International Ltd. | Electrode plate, wound electrode group, and cylindrical battery |
| CN206322775U (en) * | 2016-12-30 | 2017-07-11 | 无锡康吉新能源有限公司 | Novel soft package battery extreme ear structure |
| CN108581245A (en) * | 2018-05-31 | 2018-09-28 | 深圳市海目星激光智能装备股份有限公司 | A kind of holes Mark cutting method applied to battery core pole piece |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115842098A (en) * | 2022-08-05 | 2023-03-24 | 宁德时代新能源科技股份有限公司 | Pole piece, battery monomer, battery, electric device and pole piece manufacturing device |
| CN115842098B (en) * | 2022-08-05 | 2024-01-09 | 宁德时代新能源科技股份有限公司 | Pole piece, battery monomer, battery and electricity utilization device and pole piece manufacturing device |
| CN115780634A (en) * | 2022-09-23 | 2023-03-14 | 宁德时代新能源科技股份有限公司 | Pole piece pore-forming method, device, electronic equipment, storage medium and system |
| CN115780634B (en) * | 2022-09-23 | 2023-10-20 | 宁德时代新能源科技股份有限公司 | Pole piece pore-forming method, device, electronic equipment, storage medium and system |
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