CN105552293A - Composite rolling method for conductive composite metal sheet between battery tabs or batteries - Google Patents
Composite rolling method for conductive composite metal sheet between battery tabs or batteries Download PDFInfo
- Publication number
- CN105552293A CN105552293A CN201610063288.6A CN201610063288A CN105552293A CN 105552293 A CN105552293 A CN 105552293A CN 201610063288 A CN201610063288 A CN 201610063288A CN 105552293 A CN105552293 A CN 105552293A
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- CN
- China
- Prior art keywords
- battery
- sheet
- conducting composite
- base material
- lug
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- H01M50/531—Electrode connections inside a battery casing
-
- 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
- B21B1/38—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 sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
- H01B1/023—Alloys based on aluminium
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
- H01B1/026—Alloys based on copper
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/02—Single bars, rods, wires, or strips
-
- 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
-
- 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
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention provides a composite rolling method for a conductive composite metal sheet between battery tabs or batteries. The conductive composite metal sheet which is double-side grooved between battery tabs or batteries can be well compounded, so that the composite efficiency and the yield are improved. The method comprises the following steps: forming a groove in one side surface of each of two metal strips which have the same width and length as a base material for the conductive composite metal sheet between the battery tabs or the batteries, inlaying metal bars into the grooves in the two metal strips respectively, and cutting the metal bars corresponding to the grooves in the metal strips in equal width; painting lubricating oil on a roller which is in corresponding contact with one side surface, which is not provided with the groove, of each of the two metal strips, and then feeding the metal strips into a composite rolling mill for composite rolling; and cleaning the side surface, which is in contact with the lubricating oil, of each of the two strips, oppositely laminating the cleaned surfaces of the two strips, feeding the two strips into the rolling mill for composite rolling into one metal strip and rolling the metal strip into required thickness.
Description
Technical field
The present invention designs cell art, is specially the composite rolling method of conducting composite metal sheet between a kind of battery pole ear or battery.
Background technology
Publication number is that the Chinese utility model patent of CN203932178U discloses conducting composite metal sheet between a kind of lug of inside battery or battery, compared with conducting composite metal sheet between the lug of simple metal or battery, there is good spot weldability, see the schematic diagram of conducting composite metal chip architecture between lug in Fig. 1 or battery, between lug or battery, the base material of conducting composite metal sheet is sheet metal strip 1, groove 3 is offered respectively in positive and negative two faces of sheet metal strip 1, another kind of bonding jumper 2 is compounded with in groove, between the such extreme ear structure of processing or battery, conducting composite metal chip architecture adds man-hour is be compounded in the groove of sheet metal strip 1 by roll by the bonding jumper 2 in two faces together pressure rolling, but need recessing composite rolling bonding jumper more respectively due to the positive and negative of sheet metal strip 1, sheet metal strip 1 and bonding jumper 2 are for being respectively different metals, between different metals, composite rolling is comparatively difficult, often add machine oil during usual rolling to lubricate, improve rolling efficiency, and composite rolling infiltrate rolling when being in rolling once organic oil gap in just cannot be combined with each other, such structure all can not add oil lubricating rolling in positive and negative two faces of sheet metal strip when composite rolling, make rolling efficiency very low, reliability and rate of finished products are all lower.
Summary of the invention
For the problems referred to above, the invention provides the composite rolling method of conducting composite metal sheet between a kind of battery pole ear or battery, compound can well be carried out to conducting composite metal sheet between the battery pole ear of double surface grooving or battery, improve combined efficiency and rate of finished products.
A composite rolling method for conducting composite metal sheet between battery pole ear or battery, is characterized in that: comprise the following steps:
One, respectively two pieces there is same width and length offer groove on the surface as the side of the sheet metal strip of the base material of conducting composite metal sheet between lug or battery, be embedded in respectively by bonding jumper in the groove of two blocks of sheet metal strips, the groove of the corresponding sheet metal strip of bonding jumper is wide carries out cutting;
Sheet metal strip is sent into composite rolling mill after coating lubricating oil by the roll that not the offering of the two blocks of sheet metal strips two, obtained in step one respectively contacts corresponding to a side surface of groove and carries out composite rolling;
Three, the side surface of the contact lubricated oil of two blocks of sheet metal strips that obtains of cleaning step two respectively, then the surface after two pieces of sheet metal strips cleanings is become one block of sheet metal strip relative to sending into milling train composite rolling after laminating and is rolling to desired thickness.
Further, two blocks of sheet metal strips are obtained by one piece of sheet metal strip through-thickness cutting as the base material of conducting composite metal sheet between lug or battery.
Further, to the sheet metal strip as the base material of conducting composite metal sheet between lug or battery and the bonding jumper Rolling compund for compound, first following process is carried out to the sheet metal strip as the base material of conducting composite metal between lug or battery and the bonding jumper for compound:
A, clean oil removing with degreaser;
B, oxide layer process is carried out to the sheet metal strip as the base material of conducting composite metal sheet between lug or battery and the bar surface for compound;
C, ion processing is carried out to the sheet metal strip as the base material of conducting composite metal sheet between lug or battery and the bar surface for compound;
D, to the sheet metal strip as the base material of conducting composite metal sheet between lug or battery and the bonding jumper for compound infiltration annealing.
Further, in steps d annealing temperature be 750-850 DEG C.
Further, be copper as the sheet metal strip of the base material of conducting composite metal sheet between lug or battery, the bonding jumper for compound is aluminium.
Further, be nickel as the sheet metal strip of the base material of conducting composite metal sheet between lug or battery, the bonding jumper for compound is aluminium.
Further, be nickel as the sheet metal strip of the base material of conducting composite metal sheet between lug or battery, the bonding jumper for compound is copper.
Further, be nickel as the sheet metal strip of the base material of conducting composite metal sheet between lug or battery, the bonding jumper for compound is copper.
Further, be iron as the sheet metal strip of the base material of conducting composite metal sheet between lug or battery, the bonding jumper for compound is copper.
Further, be iron as the sheet metal strip of the base material of conducting composite metal sheet between lug or battery, the bonding jumper for compound is aluminium.
Conducting composite metal sheet between the battery pole ear adopting technique of the present invention to make or battery, first respectively compound is carried out to the base material of conducting composite metal sheet between the battery pole ear of the groove that side has on the surface or battery, compound tense can refuel and lubricate on the roll that a side surface of not slotting of base material is corresponding, compound pressure rolling efficiency can be made so greatly to improve, and compound pressure rolling rate of finished products is also high, should not cancel, again the surface of two pieces of substrate contact lubricating oil is cleaned, after cleaning, two blocks of base materials are become one block of sheet metal strip through the surface of cleaning relative to sending into milling train composite rolling after laminating, and be rolling to desired thickness, the surface that two blocks of base materials of now rolling contact is same metal, rolling difficulty reduces greatly, can oiling on the roll of now both sides, be easy to just two blocks of base materials to be rolled into one block of sheet metal strip, adopt technique of the present invention to make two sides fluting battery pole ear or battery between conducting composite metal sheet, its rolling efficiency is high, rolling difficulty also reduces greatly, the rate of finished products of the product that rolling obtains is also higher than original Rolling compund method, on base material, the thickness of the strap layer of compound can pre-set as requested, its thickness is much larger than the thickness of galvanization coating, combined strength bination is high.
Accompanying drawing explanation
Fig. 1 is the structural representation of conducting composite metal sheet between battery pole ear of the present invention or battery;
Fig. 2 is the process flow diagram of the composite rolling method of conducting composite metal sheet between battery pole ear of the present invention or battery.
Embodiment
Below in conjunction with accompanying drawing, the present invention's combination is described further.
See Fig. 2, the composite rolling method of conducting composite metal sheet between a kind of battery pole ear or battery, comprises the following steps:
One, the side having the sheet metal strip 1 as the base material of conducting composite metal sheet between lug or battery of same width and length at two pieces respectively offers groove 3 on the surface, bonding jumper 2 is embedded in respectively in the groove 3 of two blocks of sheet metal strips, the groove 3 of the corresponding sheet metal strip of bonding jumper 2 is wide carries out cutting, and two blocks of sheet metal strips 1 also can be obtained by one piece of sheet metal strip through-thickness cutting as the base material of conducting composite metal sheet between lug or battery;
Sheet metal strip is sent into composite rolling mill after coating lubricating oil by the roll that not the offering of the two blocks of sheet metal strips 1 two, obtained in step one respectively contacts corresponding to a side surface of groove 3 and carries out composite rolling;
Three, cleaning step two obtains a side surface of the contact lubricated oil of two blocks of sheet metal strips 1 respectively, then the surface 4 after being cleaned by two blocks of sheet metal strips 1 becomes one block of sheet metal strip relative to sending into milling train composite rolling after laminating and is rolling to desired thickness.
In addition, to the sheet metal strip as the base material of conducting composite metal sheet between lug or battery and the bonding jumper Rolling compund for compound, first following process is carried out to the sheet metal strip as the base material of conducting composite metal between lug or battery and the bonding jumper for compound:
A, clean oil removing with degreaser;
B, oxide layer process is carried out to the sheet metal strip as the base material of conducting composite metal sheet between lug or battery and the bar surface for compound;
C, ion processing is carried out to the sheet metal strip as the base material of conducting composite metal sheet between lug or battery and the bar surface for compound;
D, to the sheet metal strip as the base material of conducting composite metal sheet between lug or battery and the bonding jumper for compound infiltration annealing, in steps d annealing temperature be 750-850 DEG C.
Embodiment 1: be copper as the sheet metal strip of the base material of conducting composite metal sheet between lug or battery, the bonding jumper for compound is aluminium.
Embodiment 2: be nickel as the sheet metal strip of the base material of conducting composite metal sheet between lug or battery, the bonding jumper for compound is aluminium.
Embodiment 3: be nickel as the sheet metal strip of the base material of conducting composite metal sheet between lug or battery, the bonding jumper for compound is copper.
Embodiment 4: be nickel as the sheet metal strip of the base material of conducting composite metal sheet between lug or battery, the bonding jumper for compound is copper.
Embodiment 5: be iron as the sheet metal strip of the base material of conducting composite metal sheet between lug or battery, the bonding jumper for compound is copper.
Embodiment 6: be iron as the sheet metal strip of the base material of conducting composite metal sheet between lug or battery, the bonding jumper for compound is aluminium.
Conducting composite metal sheet between the battery pole ear adopting technique of the present invention to make or battery, first respectively compound is carried out to the base material of conducting composite metal sheet between the battery pole ear of the groove that side has on the surface or battery, compound tense can refuel and lubricate on the roll of the substrate surface contact of not slotting, compound pressure rolling efficiency can be made so greatly to improve, and compound pressure rolling rate of finished products is also high, should not cancel, again the surface of two pieces of substrate contact lubricating oil is cleaned, after cleaning, two blocks of base materials are become one block of sheet metal strip through the surface of cleaning relative to sending into milling train composite rolling after laminating, and be rolling to desired thickness, the surface that two blocks of base materials of now rolling contact is same metal, rolling difficulty reduces greatly, can oiling on the roll of now both sides, be easy to just two blocks of base materials to be rolled into one block of sheet metal strip, adopt technique of the present invention to make two sides fluting battery pole ear or battery between conducting composite metal sheet, its rolling efficiency is high, rolling difficulty also reduces greatly, the rate of finished products of the product that rolling obtains is also higher than original Rolling compund method, on base material, the thickness of the strap layer of compound can pre-set as requested, its thickness is much larger than the thickness of galvanization coating, combined strength bination is high.
Claims (10)
1. the composite rolling method of conducting composite metal sheet between battery pole ear or battery, is characterized in that: comprise the following steps:
One, respectively two pieces there is same width and length offer groove on the surface as the side of the sheet metal strip of the base material of conducting composite metal sheet between lug or battery, be embedded in respectively by bonding jumper in the groove of two blocks of sheet metal strips, the groove of the corresponding sheet metal strip of bonding jumper is wide carries out cutting;
Sheet metal strip is sent into composite rolling mill after coating lubricating oil by the roll that not the offering of the two blocks of sheet metal strips two, obtained in step one respectively contacts corresponding to a side surface of groove and carries out composite rolling;
Three, the side surface of the contact lubricated oil of two blocks of sheet metal strips that obtains of cleaning step two respectively, then the surface after two pieces of sheet metal strips cleanings is become one block of sheet metal strip relative to sending into milling train composite rolling after laminating and is rolling to desired thickness.
2. the composite rolling method of conducting composite metal sheet between a kind of battery pole ear according to claim 1 or battery, is characterized in that: two blocks of sheet metal strips are obtained by one piece of sheet metal strip through-thickness cutting as the base material of conducting composite metal sheet between lug or battery.
3. the composite rolling method of conducting composite metal sheet between a kind of battery pole ear according to claim 1 or battery, it is characterized in that: to the sheet metal strip as the base material of conducting composite metal sheet between lug or battery and the bonding jumper Rolling compund for compound, first following process carried out to the sheet metal strip as the base material of conducting composite metal between lug or battery and the bonding jumper for compound:
A, clean oil removing with degreaser;
B, oxide layer process is carried out to the sheet metal strip as the base material of conducting composite metal sheet between lug or battery and the bar surface for compound;
C, ion processing is carried out to the sheet metal strip as the base material of conducting composite metal sheet between lug or battery and the bar surface for compound;
D, to the sheet metal strip as the base material of conducting composite metal sheet between lug or battery and the bonding jumper for compound infiltration annealing.
4. the composite rolling method of conducting composite metal sheet between a kind of battery pole ear according to claim 3 or battery, is characterized in that: in steps d annealing temperature be 750-850 DEG C.
5. the composite rolling method of conducting composite metal sheet between a kind of battery pole ear according to claim 1 or battery, is characterized in that: be copper as the sheet metal strip of the base material of conducting composite metal sheet between lug or battery, and the bonding jumper for compound is aluminium.
6. the composite rolling method of conducting composite metal sheet between a kind of battery pole ear according to claim 1 or battery, is characterized in that: be nickel as the sheet metal strip of the base material of conducting composite metal sheet between lug or battery, and the bonding jumper for compound is aluminium.
7. the composite rolling method of conducting composite metal sheet between a kind of battery pole ear according to claim 1 or battery, is characterized in that: be nickel as the sheet metal strip of the base material of conducting composite metal sheet between lug or battery, and the bonding jumper for compound is copper.
8. the composite rolling method of conducting composite metal sheet between a kind of battery pole ear according to claim 1 or battery, is characterized in that: be nickel as the sheet metal strip of the base material of conducting composite metal sheet between lug or battery, and the bonding jumper for compound is copper.
9. the composite rolling method of conducting composite metal sheet between a kind of battery pole ear according to claim 1 or battery, is characterized in that: be iron as the sheet metal strip of the base material of conducting composite metal sheet between lug or battery, and the bonding jumper for compound is copper.
10. the composite rolling method of conducting composite metal sheet between a kind of battery pole ear according to claim 1 or battery, it is characterized in that: be iron as the sheet metal strip of the base material of conducting composite metal sheet between lug or battery, the bonding jumper for compound is aluminium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610063288.6A CN105552293B (en) | 2016-01-31 | 2016-01-31 | The composite rolling method of conducting composite metal piece between a kind of battery pole ear or battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610063288.6A CN105552293B (en) | 2016-01-31 | 2016-01-31 | The composite rolling method of conducting composite metal piece between a kind of battery pole ear or battery |
Publications (2)
| Publication Number | Publication Date |
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| CN105552293A true CN105552293A (en) | 2016-05-04 |
| CN105552293B CN105552293B (en) | 2018-08-10 |
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| CN201610063288.6A Active CN105552293B (en) | 2016-01-31 | 2016-01-31 | The composite rolling method of conducting composite metal piece between a kind of battery pole ear or battery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109604366A (en) * | 2018-12-11 | 2019-04-12 | 宜兴市惠华复合材料有限公司 | A kind of multiple processing method |
| CN110854389A (en) * | 2019-12-03 | 2020-02-28 | 宜兴市惠华复合材料有限公司 | Manufacturing method of lithium battery conductive composite metal sheet |
| CN111546015A (en) * | 2020-05-20 | 2020-08-18 | 上海大趋金属科技有限公司 | Method for manufacturing special-shaped composite interface |
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| CN1722493A (en) * | 2004-07-14 | 2006-01-18 | 谢振华 | Ear-pole of battery inner and electric sheet metal between batteries and processing method |
| CN101814594A (en) * | 2010-04-28 | 2010-08-25 | 谢振华 | Electrode ear in battery or conductive metal sheet between batteries and processing method thereof |
| CN101908607A (en) * | 2010-08-18 | 2010-12-08 | 谢振华 | Aluminum-shell battery bottom or cover plate switching welding conductive metal sheet and processing method thereof |
| US20150047181A1 (en) * | 2002-01-15 | 2015-02-19 | David M. Skinlo | Electric Storage Battery Construction and Method of Manufacture |
| CN105014306A (en) * | 2014-04-29 | 2015-11-04 | 谢振华 | Conductive composite metal sheet between lugs in batteries or batteries and machining method |
-
2016
- 2016-01-31 CN CN201610063288.6A patent/CN105552293B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150047181A1 (en) * | 2002-01-15 | 2015-02-19 | David M. Skinlo | Electric Storage Battery Construction and Method of Manufacture |
| CN1722493A (en) * | 2004-07-14 | 2006-01-18 | 谢振华 | Ear-pole of battery inner and electric sheet metal between batteries and processing method |
| CN101814594A (en) * | 2010-04-28 | 2010-08-25 | 谢振华 | Electrode ear in battery or conductive metal sheet between batteries and processing method thereof |
| CN101908607A (en) * | 2010-08-18 | 2010-12-08 | 谢振华 | Aluminum-shell battery bottom or cover plate switching welding conductive metal sheet and processing method thereof |
| CN105014306A (en) * | 2014-04-29 | 2015-11-04 | 谢振华 | Conductive composite metal sheet between lugs in batteries or batteries and machining method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109604366A (en) * | 2018-12-11 | 2019-04-12 | 宜兴市惠华复合材料有限公司 | A kind of multiple processing method |
| CN110854389A (en) * | 2019-12-03 | 2020-02-28 | 宜兴市惠华复合材料有限公司 | Manufacturing method of lithium battery conductive composite metal sheet |
| CN111546015A (en) * | 2020-05-20 | 2020-08-18 | 上海大趋金属科技有限公司 | Method for manufacturing special-shaped composite interface |
| CN111546015B (en) * | 2020-05-20 | 2022-02-11 | 上海大趋金属科技有限公司 | Method for manufacturing special-shaped composite interface |
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| CN105552293B (en) | 2018-08-10 |
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Effective date of registration: 20160912 Address after: Dongshanzui dingshuzhen Yixing city 214174 Jiangsu city of Wuxi Province Applicant after: Yixing Huiyuan composite material Co., Ltd. Address before: Dongshanzui dingshuzhen Yixing city 214174 Jiangsu city of Wuxi Province Applicant before: Xie Zhenhua |
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