CN108649176A - A kind of cell cathode ear pole of high-energy density and preparation method thereof - Google Patents
A kind of cell cathode ear pole of high-energy density and preparation method thereof Download PDFInfo
- Publication number
- CN108649176A CN108649176A CN201810327477.9A CN201810327477A CN108649176A CN 108649176 A CN108649176 A CN 108649176A CN 201810327477 A CN201810327477 A CN 201810327477A CN 108649176 A CN108649176 A CN 108649176A
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- China
- Prior art keywords
- lug
- copper nickel
- nickel plating
- welding
- metal film
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Classifications
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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
- H01M50/531—Electrode connections inside a battery casing
-
- 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
-
- 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)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses a kind of negative lugs of high polymer lithium-ion-power cell energy density, include successively copper nickel-plated metal piece lug, welded lap area and switching aluminum metal film, PP polypropylene modification resins are fixed on copper nickel-plated metal piece lug.Aluminium is cut into required length as needed when making, then copper nickel plating lug is navigated on mold, aluminum metal film is navigated in copper nickel plating, the two overlaps to form welded lap area；Make its bonding using two metals of laser welding apparatus Flashmelt.The negative lug of the present invention, improves battery pack integral energy density index.Density of material 2.7g/cm3 reduces power battery overall weight 6kg or more；Solve power battery connection in series-parallel Welding Problems in follow-up assembling；Copper nickel plating is transferred after aluminium flake, and follow-up and aluminium pole welding becomes to be more prone to, and reliably, metal component is consistent so that the solder joint after welding is securely integrally formed, and is extended battery and is played a key effect.
Description
Technical field
The present invention relates to high polymer lithium ion power battery technology field, specially a kind of battery of high-energy density is negative
Pole lug and preparation method thereof.
Background technology
《New-energy automobile industrial development planning》In, country proposes to greatly develop industry, promotes the hair of new energy technology
Exhibition and application, the polymer method for soft package lithium ion power (hereinafter referred to as power battery) especially used in new-energy automobile,
Light-weight with its, energy density is high, and safety is superior etc., and performances are increasingly paid attention to by a manufacturer, but power battery is for new
Energy passenger car is at the early-stage after all, also many urgent problems to be solved, and it is wherein heavy to improve energy density and security performance
The ring wanted.
Power battery energy density is the key parameter for being related to vehicle and capable of exercising max mileage, is limited to passenger car itself
Big small size, energy density is bigger, and enforcement mileage is bigger, otherwise smaller, and each producer, research institute have put into largely in this respect
The manpower of financial resources, also achieves many achievements, and the present invention is exactly to arise in this context.Polymer Li-ion battery
It is made of major parts such as battery core, electrolyte and extraction wires, wherein positive extraction wire is pure material, uses specification
For：0.2~0.5mm thickness *, 40~100mm wide, cathode conductor introduction are that copper plates nickel material, are using specification：0.2~0.5mm thickness *
40~100mm wide is shown in that single power battery schematic diagram is as shown in Fig. 1.In Fig. 1,1 is PP polypropylene modification resins, 3 copper
Nickel-plated metal piece.
In order to which connection in series-parallel connects, conductor length is generally 50mm~100mm.It is negative that the present invention be directed to the lugs of power battery
Pole material, due to having particular/special requirement to the potential difference of ear pole material in the electrolytic solution in polymer Li-ion battery, so copper plates
Nickel is necessary used as cell negative electrode material.
The copper nickel plating that current power cell cathode ear pole uses, has the following disadvantages：
First, copper nickel plating does power battery lug due to the density of metal is big, the aluminum material relative to anode
Heavier-weight increases the weight of monomer lug, is 3 times of positive aluminium pole ears weight, reduces the energy density index of battery；
Second, must be attached using copper-base column using copper nickel plating, copper-base column generally use 5~10mm thickness 20~
40mm wide, long 2~3 meters of copper coin make, and battery pack overall weight reaches 10kg or so.
Third, not prison welding when copper nickel plating is welded to copper-base column in parallel by battery assembling procedure, welding difficulty is big, this be by
There is the reason of nickel coating in copper nickel plating surface.
Invention content
The technical problem to be solved by the present invention is to overcome the energy densities that negative lug in the prior art reduces battery
The defect of index provides a kind of cell cathode ear pole of high-energy density and preparation method thereof.
In order to solve the above technical problem, the present invention provides the following technical solutions：
A kind of cell cathode ear pole of high-energy density, which is characterized in that include copper nickel-plated metal piece lug, welding successively
Overlap and switching aluminum metal film, PP polypropylene modification resins are fixed on copper nickel-plated metal piece lug.
The production method of above-mentioned negative lug, includes the following steps：
1) required length, is cut into the aluminium of width according to the selection of copper nickel plating lug width；
2), the copper nickel plating lug with PP polypropylene modification resins is navigated on mold, aluminum metal film is navigated into copper
In nickel plating, aluminum metal film partly overlaps to form welded lap area with copper nickel-plated metal piece lug；
3) it, is pushed using cylinder, so that the copper nickel plating lug in welded lap area and aluminum metal film is fitted closely, use Laser Welding
Connecing two metals of equipment Flashmelt makes its bonding.
Preferably, it is shaken brilliant welding equipment using WF350 type fiber optic conductions in the step 3).The optical maser wavelength of laser welding
For 0.1~4.0ms, laser frequency is 1~20Hz, and average laser power is 10~100W, and laser energy is 20~70J.Laser
The technological parameter of welding is the key that the present invention.
Further, in the step 3) using the welding hollow briquetting driven at cylinder by the copper nickel plating in welded lap area
Lug and aluminum metal film are tightly compacted, and the contact surface in welding hollow briquetting and welded lap area is flexible silicon offset plate.
Further, the pressure of welding hollow briquetting is 0.2~0.4Mpa in the step 3), can prevent briquetting and material
Material contact causes stress deformation or weighs wounded.
Further, the positioning that aluminum metal film positions in the step 2) is determined aluminum metal film using two locating pieces in left and right
On position to copper nickel plating.
The density for the copper nickel plating that power battery lug cathode uses in prior art is 8.9g/cm3, is used in the present invention close
Smaller aluminium (density 2.7g/cm3) alternate power battery pole ear cathode copper nickel plating is spent, it can be in whole lug weight saving 3
Times or more, for the battery pack of one group of hundreds of thousands of a battery cell composition, the reduction of this weight is considerable.
After power battery cathode copper nickel plating has used aluminium to substitute, aluminium pole is used in the assembling of subsequent battery, due to aluminium
Density it is low, melting temperature is low, it is easier to connection in series-parallel welding assembly, the flexibility of aluminium improve the reliability of battery connection, under
The folding quality in face can illustrate aluminium anti-vibration this section aspect superior function：
Aluminium：180 degree folding is tested>=12 times
Copper nickel plating：180 degree folding is tested>=7 times.
The advantageous effect that is reached of the present invention is：
First, improve battery pack integral energy density index.Copper nickel plating, density of material 8.9g/ are used in the prior art
cm3, part copper nickel plating is converted into aluminium flake, density of material 2.7g/cm by the present invention using advanced laser welding technology3, reduce dynamic
Power battery overall weight 6kg or more.
Second, solve power battery connection in series-parallel Welding Problems in follow-up assembling.Ultrasonic welding is used in the prior art
All exist with the method for fastened by screw and be easy loosening, fracture and desoldering, passenger car service life is electric all at 10 years or more after all
The secured performance of assembly welding in pond is exactly a very crucial index.The use of laser welding technology is molten using laser in the present invention
Melt two kinds of different metals, the technology being merged at high temperature, firm welding is reliable, will not loosen, solder joint is not easy to break, swashs
Photocoagulation is stablized, and parameter degree of controllability is high, phenomena such as will not causing desoldering.
Third, copper nickel plating are transferred after aluminium flake, and follow-up and aluminium pole welding becomes to be more prone to, reliably, metal component one
It causes so that the solder joint after welding is securely integrally formed, and is extended battery and is played a key effect.
Description of the drawings
Attached drawing is used to provide further understanding of the present invention, and a part for constitution instruction, the reality with the present invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.In the accompanying drawings：
Fig. 1 is copper nickel plating lug schematic diagram in the prior art；
Fig. 2 is the structural schematic diagram of the lug of the present invention；
Fig. 3 is the diagrammatic cross-section in welded lap area；
The position relationship structural diagram of hollow briquetting and welded lap area is welded when Fig. 4 is laser welding in embodiment；
Laser waveform schematic diagram when Fig. 5 is laser welding in embodiment；
Fig. 6 is to weld the three of hollow briquetting to regard schematic diagram.
Specific implementation mode
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
Embodiment
A kind of cell cathode ear pole of high-energy density includes copper nickel-plated metal piece lug 3,5 and of welded lap area successively
Switching aluminum metal film 4, PP polypropylene modifications resin 1 is fixed on copper nickel-plated metal piece lug 3.As shown in Figure 2.Fig. 3 is
The diagrammatic cross-section in welded lap area, in figure 36 Laser Weldings melt fusing point.
The production method of above-mentioned negative lug, includes the following steps：
1) required length, is cut into the aluminium of width according to the selection of copper nickel plating lug width, uses ZL-A type sheet metals
Anticipate long guillotine to complete；
2), the copper nickel plating lug with PP polypropylene modification resins is navigated on mold, aluminum metal film is navigated into copper
In nickel plating, aluminum metal film partly overlaps to form welded lap area with copper nickel-plated metal piece lug；Positioning is using the positioning of left and right two
Block navigates to aluminum metal film in copper nickel plating.As shown in Figure 2.
3) it, is pushed using cylinder, so that the copper nickel plating lug in welded lap area and aluminum metal film is fitted closely, using WF350
Type fiber optic conduction is shaken brilliant welding equipment, and the optical maser wavelength of laser welding is 0.1~4.0ms, and laser frequency is 1~20Hz, laser
Mean power is 10~100W, and laser energy is 20~70J, and two metals of Flashmelt make its bonding.As shown in figure 4, in Fig. 4
7 be mold base, and 8 be left locating piece, and 9 be right locating piece, 2 welding hollow briquettings.
When cylinder pushes, using the welding hollow briquetting driven at cylinder by the copper nickel plating lug and aluminium gold in welded lap area
Belong to piece to be tightly compacted, the contact surface in welding hollow briquetting and welded lap area is flexible silicon offset plate.Weld the pressure of hollow briquetting
For 0.2~0.4Mpa.
Laser waveform schematic diagram when Fig. 5 is laser welding in embodiment.
Fig. 6 is to weld the three of hollow briquetting to regard schematic diagram.In Fig. 6 10 be for laser by back-shaped slot.
Finally it should be noted that：The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
With technical scheme described in the above embodiments is modified or equivalent replacement of some of the technical features.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in the present invention's
Within protection domain.
Claims (7)
1. a kind of cell cathode ear pole of high-energy density, which is characterized in that include copper nickel-plated metal piece lug successively, weld and take
Area and switching aluminum metal film are met, PP polypropylene modification resins are fixed on copper nickel-plated metal piece lug.
2. a kind of production method of negative lug described in claim 1, which is characterized in that include the following steps：
1) required length, is cut into the aluminium of width according to the selection of copper nickel plating lug width；
2), the copper nickel plating lug with PP polypropylene modification resins is navigated on mold, aluminum metal film is navigated into copper nickel plating
On, aluminum metal film partly overlaps to form welded lap area with copper nickel-plated metal piece lug；
3) it, is pushed using cylinder, so that the copper nickel plating lug in welded lap area and aluminum metal film is fitted closely, set using laser welding
Standby two metals of Flashmelt make its bonding.
3. the production method of negative lug as described in claim 1, which is characterized in that use WF350 types in the step 3)
Fiber optic conduction is shaken brilliant welding equipment.
4. the production method of negative lug as claimed in claim 3, which is characterized in that the optical maser wavelength of laser welding is 0.1
~4.0ms, laser frequency are 1~20Hz, and average laser power is 10~100W, and laser energy is 20~70J.
5. the production method of negative lug as described in claim 1, which is characterized in that use in the step 3) and driven at cylinder
The copper nickel plating lug and aluminum metal film in welded lap area are tightly compacted by dynamic welding hollow briquetting, welding hollow briquetting and welding
The contact surface of overlap is flexible silicon offset plate.
6. the production method of negative lug as described in claim 1, which is characterized in that weld hollow briquetting in the step 3)
Pressure be 0.2~0.4Mpa.
7. the production method of negative lug as described in claim 1, which is characterized in that aluminum metal film positions in the step 2)
Positioning using left and right two locating pieces aluminum metal film is navigated in copper nickel plating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810327477.9A CN108649176A (en) | 2018-04-12 | 2018-04-12 | A kind of cell cathode ear pole of high-energy density and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810327477.9A CN108649176A (en) | 2018-04-12 | 2018-04-12 | A kind of cell cathode ear pole of high-energy density and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108649176A true CN108649176A (en) | 2018-10-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810327477.9A Pending CN108649176A (en) | 2018-04-12 | 2018-04-12 | A kind of cell cathode ear pole of high-energy density and preparation method thereof |
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| Country | Link |
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| CN (1) | CN108649176A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112355477A (en) * | 2020-11-18 | 2021-02-12 | 苏州松控电子科技有限公司 | Welding method for electrode plate of electrolytic capacitor |
| CN113634893A (en) * | 2021-08-13 | 2021-11-12 | 远景动力技术(江苏)有限公司 | Method for welding copper sampling terminal and aluminum tab and battery |
| CN116526077A (en) * | 2022-12-02 | 2023-08-01 | 广州安费诺诚信软性电路有限公司 | Direct welding method for copper foil and aluminum bar of flexible circuit board |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202094205U (en) * | 2011-05-26 | 2011-12-28 | 东莞市利赛奥新能源科技有限公司 | Connection mechanism for flexible packaging lithium ion battery lug and nickel strap |
| JP2013225522A (en) * | 2013-06-27 | 2013-10-31 | Toshiba Corp | Nonaqueous electrolyte secondary battery and battery pack |
| CN205081162U (en) * | 2015-10-20 | 2016-03-09 | 范能文 | Belt utmost point ear |
-
2018
- 2018-04-12 CN CN201810327477.9A patent/CN108649176A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202094205U (en) * | 2011-05-26 | 2011-12-28 | 东莞市利赛奥新能源科技有限公司 | Connection mechanism for flexible packaging lithium ion battery lug and nickel strap |
| JP2013225522A (en) * | 2013-06-27 | 2013-10-31 | Toshiba Corp | Nonaqueous electrolyte secondary battery and battery pack |
| CN205081162U (en) * | 2015-10-20 | 2016-03-09 | 范能文 | Belt utmost point ear |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112355477A (en) * | 2020-11-18 | 2021-02-12 | 苏州松控电子科技有限公司 | Welding method for electrode plate of electrolytic capacitor |
| CN112355477B (en) * | 2020-11-18 | 2024-01-19 | 苏州松控电子科技有限公司 | Electrode plate welding method for electrolytic capacitor |
| CN113634893A (en) * | 2021-08-13 | 2021-11-12 | 远景动力技术(江苏)有限公司 | Method for welding copper sampling terminal and aluminum tab and battery |
| CN116526077A (en) * | 2022-12-02 | 2023-08-01 | 广州安费诺诚信软性电路有限公司 | Direct welding method for copper foil and aluminum bar of flexible circuit board |
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Application publication date: 20181012 |
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| RJ01 | Rejection of invention patent application after publication |