CN111086290A - Lithium battery connecting material and processing technology thereof - Google Patents
Lithium battery connecting material and processing technology thereof Download PDFInfo
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- CN111086290A CN111086290A CN201911392803.5A CN201911392803A CN111086290A CN 111086290 A CN111086290 A CN 111086290A CN 201911392803 A CN201911392803 A CN 201911392803A CN 111086290 A CN111086290 A CN 111086290A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/013—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/202—Conductive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/10—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
- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention relates to the technical field of lithium battery connecting materials, and discloses a processing technology of a lithium battery connecting material, which comprises the following steps: selecting raw materials, compounding, polishing, performing primary annealing treatment, performing primary rolling treatment, plating a nickel layer, performing secondary annealing treatment, performing secondary rolling treatment and performing tertiary annealing treatment; according to the processing technology of the lithium battery connecting material provided by the invention, the plastic deformation of metal and the atomic diffusion principle between metals are fully utilized, stainless steel and pure copper are combined into a whole through certain mechanical occlusion, and the surface is plated with nickel after the processing is carried out to a certain thickness. The product manufactured by the invention not only has high conductivity, but also has certain strength and toughness. In addition, the stainless steel is not easy to corrode, so that the resistance safety is not affected by rusting.
Description
Technical Field
The invention relates to the technical field of lithium battery connecting materials, in particular to a lithium battery connecting material and a processing technology thereof.
Background
In order to electrically connect a plurality of lithium batteries to form a battery pack and facilitate management and control of a battery system and reasonable management of electric quantity, at present, manufacturers use connecting materials made by punching nickel strips or mild steel SPCC surface nickel plating strips, and the two ends of the connecting materials are respectively welded with the lithium batteries, so that the plurality of lithium batteries are connected to form the battery pack.
However, the traditional lithium battery connecting material has a series of defects more or less, specifically, pure nickel has high cost, while the nickel plating belt on the surface of the excellent carbon steel SPCC has unstable performance, poor conductivity and high internal resistance, the internal electric quantity of the battery cannot be completely released, and the plating layer on the surface of the excellent carbon steel SPCC is easy to rust after falling off, so that the internal resistance safety of the product is reduced and the product is extremely unsafe.
Disclosure of Invention
The invention aims to provide a lithium battery connecting material and a processing technology thereof, and aims to solve the problem that a lithium battery connecting material with low cost and stable conductivity is lacked in the prior art.
The invention is realized in such a way that, in a first aspect, the invention provides a processing technology of a lithium battery connecting material, which comprises the following steps:
selecting raw materials: selecting a stainless steel strip with the thickness of 2.0-3.0mm and the width of 100-;
compounding: rolling and compounding the selected stainless steel band and the selected pure copper band, and simultaneously providing certain heat energy for the stainless steel band, wherein the temperature of the stainless steel band is controlled to be at 700-plus-800 ℃, and simultaneously providing certain heat energy for the pure copper band, and the temperature of the pure copper band is controlled to be at 300-plus-400 ℃, so that the stainless steel band and the pure copper band are compounded into a whole to obtain a composite strip;
polishing treatment: carrying out surface polishing treatment on the composite strip to remove impurities generated on the surface of the composite strip in the compounding process;
first annealing treatment: annealing the polished composite strip at 850-920 ℃;
first calendering treatment: performing multiple rolling treatment on the composite strip subjected to the first annealing treatment by using a multi-roller rolling mill until the required thickness requirement is met;
nickel plating layer: plating a nickel layer on the copper surface of the annealed composite strip to obtain a finished strip;
and (3) second annealing treatment: annealing the finished product strip at 850-920 ℃;
and (3) second rolling treatment: performing multiple rolling treatments on the finished strip subjected to the secondary annealing treatment by using a multi-roller rolling mill until the required thickness requirement is met;
and (3) annealing for the third time: and carrying out third annealing treatment on the finished strip subjected to the rolling treatment, wherein the annealing temperature is 850-920 ℃.
Further, in the compounding: the processing technology comprises the following steps of calendering and compounding the selected stainless steel belt and the selected pure copper belt, providing certain heat energy for the stainless steel belt, controlling the temperature of the stainless steel belt at 700-plus-800 ℃, providing certain heat energy for the pure copper belt, controlling the temperature of the pure copper belt at 300-plus-400 ℃, and combining the stainless steel belt and the pure copper belt into a whole to obtain a composite belt material, wherein the processing technology further comprises the following steps:
cleaning treatment: and cleaning the surfaces of the selected stainless steel belt and the selected pure copper belt.
Further, the cleaning process: the method comprises the following steps of carrying out surface cleaning treatment on the selected stainless steel belt and the selected pure copper belt, and specifically comprises the following steps:
polishing and impurity removal and deoxidization are carried out on the selected stainless steel belt and the selected pure copper belt through polishing equipment;
and carrying out surface drying treatment on the stainless steel belt and the pure copper belt which are polished, decontaminated and deoxidized by drying equipment.
Further, in the compounding: the method comprises the steps of carrying out calendering compounding on a selected stainless steel belt and a selected pure copper belt, simultaneously providing certain heat energy for the stainless steel belt, controlling the temperature of the stainless steel belt to be 800 ℃ plus one, simultaneously providing certain heat energy for the pure copper belt, controlling the temperature of the pure copper belt to be 400 ℃ plus one, and combining the stainless steel belt and the pure copper belt into a whole to obtain a composite belt material, wherein the stainless steel belt and the pure copper belt are calendered and compounded through a pressure compounding machine, and an inert gas (N2) or an ammonia decomposition gas (N2, H2) is introduced into the pressure compounding machine to ensure a reduction environment when the stainless steel belt and the pure copper belt are calendered and compounded.
Further, the thickness of the nickel layer is 3-5 μm.
Further, in the third annealing treatment: after the step of performing the third annealing treatment on the finished strip subjected to the rolling treatment, the processing technology further comprises the following steps:
slitting treatment: and cutting the finished strip subjected to the third annealing treatment to obtain a finished product with a required width, polishing the side surface of the finished product, and passivating the cut surface of the finished product.
Compared with the prior art, the processing technology of the lithium battery connecting material fully utilizes the plastic deformation of metal and the intermetallic atom diffusion principle, combines stainless steel and pure copper into a whole through certain mechanical occlusion, and carries out surface nickel plating after the processing to a certain thickness. The product manufactured by the invention not only has high conductivity, but also has certain strength and toughness. In addition, the stainless steel is not easy to corrode, so that the resistance safety is not affected by rusting.
In a second aspect, the invention provides a lithium battery connecting material, which is characterized in that the lithium battery connecting material is obtained by processing the processing technology.
Compared with the prior art, the lithium battery connecting material provided by the invention combines stainless steel and pure copper into a whole through certain mechanical occlusion, and the surface is plated with nickel after the stainless steel and the pure copper are processed to a certain thickness. The material not only has high conductivity, but also has certain strength and toughness; in addition, because the stainless steel is not easy to corrode, the resistance safety is not affected by rusting; the lithium battery pack is particularly suitable for connecting a plurality of lithium batteries to form a battery pack.
Drawings
Fig. 1 is a schematic flow chart of a processing process of a lithium battery connecting material according to a first embodiment of the present invention;
FIG. 2 is a schematic flow chart of a process for manufacturing a lithium battery connecting material according to a second embodiment of the present invention;
fig. 3 is a schematic flowchart of step S11 provided in the second embodiment of the present invention;
fig. 4 is a schematic flow chart of a processing process of a lithium battery connection material according to a third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
The following describes the implementation of the present invention in detail with reference to specific embodiments.
Fig. 1 is a schematic flow chart of a processing process of a lithium battery connection material according to a first embodiment of the present invention, referring to fig. 1, the processing process includes the following steps:
s1, selecting raw materials: a stainless steel strip with a thickness of 2.0-3.0mm (such as 2.0mm, 2.5mm or 3.0mm) and a width of 100-150mm (such as 100mm, 125mm or 150mm) is selected, a pure copper strip with a thickness of 0.8-1.2mm (such as 0.8mm, 1.0mm or 1.2mm) and a width of 100-150mm (such as 100mm, 125mm or 150mm) is selected, the stainless steel strip and the pure copper strip are in a soft state, the stainless steel strip has a hardness of 140-160HV0.2 (such as 140HV0.2, 150HV0.2 or 160HV0.2), and the pure copper strip has a hardness of 70-80HV0.2 (such as 70HV0.2, 75HV0.2 or 80HV 0.2).
S2, compounding: rolling and compounding the selected stainless steel belt and the pure copper belt, and simultaneously providing certain heat energy for the stainless steel belt, wherein the temperature of the stainless steel belt is controlled at 800 ℃ of 700-; the composite strip obtained after compounding is broken back and forth at 90 degrees, and the end face is not separated to serve as the qualified standard of compounding.
Preferably, in step S2, the stainless steel strip and the pure copper strip are rolled and compounded by a pressure compound machine, and in order to ensure the cleanliness between the selected pure nickel strip and the pure copper strip, an inert gas (N2) or an ammonia decomposition gas (N2, H2) is introduced into the pressure compound machine to ensure the reducing environment when the stainless steel strip and the pure copper strip are rolled and compounded; thereby ensuring the cleanliness among materials and not generating substances with poor plasticity so as to influence the bonding strength of the materials.
S3, polishing treatment: and (3) carrying out surface polishing treatment on the composite strip to remove impurities generated on the surface of the composite strip in the compounding process.
Specifically, the composite strip integrated in step S2 is subjected to a surface polishing treatment in a polishing treatment machine to remove impurities generated on the surface of the composite strip during the compounding process, so as to eliminate surface defects (such as scratches, indentations, pits, etc.) of the product during the subsequent processing.
S4, first annealing treatment: and annealing the polished composite strip at 850-920 ℃.
In this embodiment, the annealing temperature range of the first annealing treatment is 850-; specifically, a proper annealing temperature can be selected through the difference of deformation in the compounding process; the main purpose of the annealing treatment is to make the crossed interface bonded more tightly through the diffusion of atoms between materials and strengthen the composite strength of the product.
S5, first rolling treatment: and (4) performing multiple rolling treatment on the composite strip subjected to the first annealing treatment by using a multi-roller rolling mill until the required thickness requirement is met.
S6, nickel plating layer: and plating a nickel layer on the copper surface of the annealed composite strip to obtain a finished strip.
The nickel layer has good conductive performance; preferably, the nickel layer has a thickness of 3-5 μm.
S7, second annealing treatment: annealing the finished product strip at 850-920 ℃;
s8, second rolling treatment: performing multiple rolling treatments on the finished strip subjected to the secondary annealing treatment by using a multi-roller rolling mill until the required thickness requirement is met;
s9, third annealing treatment: and carrying out third annealing treatment on the finished strip subjected to the rolling treatment, wherein the annealing temperature is 850-920 ℃.
And the integral composite strength of the obtained finished product strip is greatly improved through multiple annealing treatments.
According to the processing technology of the lithium battery connecting material, the plastic deformation of metal and the intermetallic atom diffusion principle are fully utilized, stainless steel and pure copper are combined into a whole through certain mechanical occlusion, and the surface is plated with nickel after the stainless steel and the pure copper are processed to a certain thickness. The product manufactured by the invention not only has high conductivity, but also has certain strength and toughness. In addition, the stainless steel is not easy to corrode, so that the resistance safety is not affected by rusting.
Based on the first embodiment of the present invention, a second embodiment of the present invention is provided, and fig. 2 is a schematic flow chart of a processing process of a lithium battery connection material according to the second embodiment of the present invention, please refer to fig. 2, before the step S2, the processing process further includes the following steps:
s11, cleaning: and cleaning the surfaces of the selected stainless steel belt and the selected pure copper belt.
After the stainless steel strip and the pure copper strip are cleaned in the step S11, the step S2 is executed, so that the strength of the joint surface of the stainless steel strip and the pure copper strip can be greatly improved, and the composite effect of the stainless steel strip and the pure copper strip is improved.
Specifically, fig. 3 is a schematic flowchart of the step S11 according to the second embodiment of the present invention, and referring to fig. 3, the step S11 specifically includes the following steps:
s111, performing surface polishing, impurity removal and deoxidization on the selected stainless steel belt and the selected pure copper belt through polishing equipment; thus, impurities and metal oxides on the surfaces of the stainless steel strip and the pure copper strip can be removed.
S112, carrying out surface drying treatment on the stainless steel belt and the pure copper belt which are polished, decontaminated and deoxidized through drying equipment; therefore, the surfaces of the stainless steel belt and the pure copper belt can be kept dry, and potential quality hazards such as water stains/water spots are avoided.
Based on the second embodiment of the present invention, a third embodiment of the present invention is provided, fig. 4 is a schematic flow chart of a processing process of a lithium battery connection material according to the third embodiment of the present invention, and referring to fig. 4, after the step S9, the processing process further includes the following steps:
s10, slitting: and cutting the finished strip subjected to the third annealing treatment to obtain a finished product with a required width, polishing the side surface of the finished product, and passivating the cut surface of the finished product.
In a second aspect, the invention provides a lithium battery connecting material, which is characterized in that the lithium battery connecting material is obtained by processing the processing technology.
According to the lithium battery connecting material, the stainless steel and the pure copper are combined into a whole through certain mechanical occlusion, and the surface of the lithium battery connecting material is plated with nickel after the stainless steel and the pure copper are processed to a certain thickness. The material not only has high conductivity, but also has certain strength and toughness; in addition, because the stainless steel is not easy to corrode, the resistance safety is not affected by rusting; the lithium battery pack is particularly suitable for connecting a plurality of lithium batteries to form a battery pack.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A processing technology of a lithium battery connecting material is characterized by comprising the following steps:
selecting raw materials: selecting a stainless steel strip with the thickness of 2.0-3.0mm and the width of 100-;
compounding: rolling and compounding the selected stainless steel band and the selected pure copper band, and simultaneously providing certain heat energy for the stainless steel band, wherein the temperature of the stainless steel band is controlled to be at 700-plus-800 ℃, and simultaneously providing certain heat energy for the pure copper band, and the temperature of the pure copper band is controlled to be at 300-plus-400 ℃, so that the stainless steel band and the pure copper band are compounded into a whole to obtain a composite strip;
polishing treatment: carrying out surface polishing treatment on the composite strip to remove impurities generated on the surface of the composite strip in the compounding process;
first annealing treatment: annealing the polished composite strip at 850-920 ℃;
first calendering treatment: performing multiple rolling treatment on the composite strip subjected to the first annealing treatment by using a multi-roller rolling mill until the required thickness requirement is met;
nickel plating layer: plating a nickel layer on the copper surface of the annealed composite strip to obtain a finished strip;
and (3) second annealing treatment: annealing the finished product strip at 850-920 ℃;
and (3) second rolling treatment: performing multiple rolling treatments on the finished strip subjected to the secondary annealing treatment by using a multi-roller rolling mill until the required thickness requirement is met;
and (3) annealing for the third time: and carrying out third annealing treatment on the finished strip subjected to the rolling treatment, wherein the annealing temperature is 850-920 ℃.
2. The process for preparing a lithium battery connecting material as claimed in claim 1, wherein the compounding step comprises: the processing technology comprises the following steps of calendering and compounding the selected stainless steel belt and the selected pure copper belt, providing certain heat energy for the stainless steel belt, controlling the temperature of the stainless steel belt at 700-plus-800 ℃, providing certain heat energy for the pure copper belt, controlling the temperature of the pure copper belt at 300-plus-400 ℃, and combining the stainless steel belt and the pure copper belt into a whole to obtain a composite belt material, wherein the processing technology further comprises the following steps:
cleaning treatment: and cleaning the surfaces of the selected stainless steel belt and the selected pure copper belt.
3. The process for producing a lithium battery connecting material as claimed in claim 2, wherein the cleaning treatment comprises: the method comprises the following steps of carrying out surface cleaning treatment on the selected stainless steel belt and the selected pure copper belt, and specifically comprises the following steps:
polishing and impurity removal and deoxidization are carried out on the selected stainless steel belt and the selected pure copper belt through polishing equipment;
and carrying out surface drying treatment on the stainless steel belt and the pure copper belt which are polished, decontaminated and deoxidized by drying equipment.
4. A process for manufacturing a lithium battery connecting material as claimed in any one of claims 1 to 3, wherein, in the compounding: the method comprises the steps of carrying out calendering compounding on a selected stainless steel belt and a selected pure copper belt, simultaneously providing certain heat energy for the stainless steel belt, controlling the temperature of the stainless steel belt to be 800 ℃ plus one, simultaneously providing certain heat energy for the pure copper belt, controlling the temperature of the pure copper belt to be 400 ℃ plus one, and combining the stainless steel belt and the pure copper belt into a whole to obtain a composite belt material, wherein the stainless steel belt and the pure copper belt are calendered and compounded through a pressure compounding machine, and an inert gas (N2) or an ammonia decomposition gas (N2, H2) is introduced into the pressure compounding machine to ensure a reduction environment when the stainless steel belt and the pure copper belt are calendered and compounded.
5. The process for producing a lithium battery connecting material as claimed in claim 1, wherein the nickel layer has a thickness of 3 to 5 μm.
6. The process for preparing a lithium battery connecting material as claimed in claim 1, wherein in the third annealing treatment: after the step of performing the third annealing treatment on the finished strip subjected to the rolling treatment, the processing technology further comprises the following steps:
slitting treatment: and cutting the finished strip subjected to the third annealing treatment to obtain a finished product with a required width, polishing the side surface of the finished product, and passivating the cut surface of the finished product.
7. A lithium battery connecting material, characterized in that it is processed by the process according to any one of claims 1 to 6.
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| CN201911392803.5A CN111086290A (en) | 2019-12-30 | 2019-12-30 | Lithium battery connecting material and processing technology thereof |
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| CN201911392803.5A CN111086290A (en) | 2019-12-30 | 2019-12-30 | Lithium battery connecting material and processing technology thereof |
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| CN112652864A (en) * | 2020-12-21 | 2021-04-13 | 深圳市鑫越新材料科技有限公司 | Lithium battery tab material and processing technology thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112652864A (en) * | 2020-12-21 | 2021-04-13 | 深圳市鑫越新材料科技有限公司 | Lithium battery tab material and processing technology thereof |
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