CN104332579B - A kind of lithium-ion battery cathode-post deriving structure and resistance butt-joint method - Google Patents
A kind of lithium-ion battery cathode-post deriving structure and resistance butt-joint method Download PDFInfo
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- CN104332579B CN104332579B CN201410447509.0A CN201410447509A CN104332579B CN 104332579 B CN104332579 B CN 104332579B CN 201410447509 A CN201410447509 A CN 201410447509A CN 104332579 B CN104332579 B CN 104332579B
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- steel shell
- welded nut
- battery steel
- battery
- butt
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- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 14
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 45
- 239000010959 steel Substances 0.000 claims abstract description 45
- 238000003466 welding Methods 0.000 claims abstract description 7
- 230000004927 fusion Effects 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 229910052744 lithium Inorganic materials 0.000 description 15
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 12
- 239000000463 material Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 229910010707 LiFePO 4 Inorganic materials 0.000 description 1
- 229910002993 LiMnO2 Inorganic materials 0.000 description 1
- SOZVEOGRIFZGRO-UHFFFAOYSA-N [Li].ClS(Cl)=O Chemical compound [Li].ClS(Cl)=O SOZVEOGRIFZGRO-UHFFFAOYSA-N 0.000 description 1
- GJCNZQUZWSHFHP-UHFFFAOYSA-N [Li].O=S=O Chemical compound [Li].O=S=O GJCNZQUZWSHFHP-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/14—Projection welding
-
- 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
- H01M50/543—Terminals
-
- 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
Landscapes
- 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)
- Secondary Cells (AREA)
Abstract
A kind of lithium-ion battery cathode-post deriving structure and resistance butt-joint method.A kind of lithium-ion battery cathode-post deriving structure, including hollow cylinder battery steel shell, cylinder conductive seat it is provided with inside battery steel shell, conductive seat axial centre position is fixing connects negative terminal, negative terminal passes from battery steel shell bottom through-hole, pass battery steel shell surface at negative terminal and be provided with screw thread, screw thread is rotary with the welded nut of correspondence as negative pole leading-out terminal.Bumps of the present invention is divided into and multiple is evenly distributed on welded nut lower surface, good airproof performance between welded nut and battery steel shell after welding, directly utilizes the welded nut negative pole leading-out terminal as battery, and mechanism is simple, safe and reliable, and the problem thoroughly solving battery cathode end leakage.And the present invention adopt salient point replace the locating slot in traditional resistor butt-joint, it is ensured that welded nut precision will not reduce.
Description
Technical field
The present invention relates to lithium battery production field, particularly relate to a kind of lithium-ion battery cathode-post deriving structure and resistance butt-joint method.
Background technology
Lithium battery is a class is negative material, the battery using non-aqueous electrolytic solution by lithium metal or lithium alloy.The lithium battery occurred the earliest comes from inventor Edison of greatness, uses following reaction: this reaction of Li+MnO2=LiMnO2 is redox reaction, electric discharge.Owing to the chemical characteristic of lithium metal is very active so that the processing of lithium metal, preservation, use, environmental requirement is very high.So, lithium battery is not applied for a long time.Along with the development of science and technology, present lithium battery has had become as main flow.
The kind more excellent in order to develop performance, various materials have been studied by people.Thus producing unprecedented product.Such as, lithium-sulfur dioxide cell and lithium thionyl chloride cell just have feature very much.Their positive active material is also the solvent of electrolyte simultaneously.This structure only just there will be at the electrochemical system of non-aqueous solution.So, the research of lithium battery, also promote the development of non-aqueous system electrochemical theory.Outside except with various nonaqueous solvents, people have also carried out the research of polymer thin film battery.
Lithium battery is widely used in multiple fields such as the accumulation power supply systems such as waterpower, firepower, wind-force and solar power station, the uninterrupted power source of post and telecommunications, and electric tool, electric bicycle, battery-operated motor cycle, electric automobile, military equipment, Aero-Space.
Lithium ion battery is widely used with its distinctive performance advantage in portable electronics such as laptop computer, video camera, mobile communication.The high capacity lithium ion battery of exploitation starts to try out in electric automobile, it is contemplated that by one of major impetus power supply becoming 21 century electric automobile, and will be applied in artificial satellite, Aero-Space and energy storage.Pressure along with the in short supply of the energy He the environmental protection aspect in the world.Lithium electricity is widely used in electric motor car industry, particularly the appearance of LiFePO 4 material battery, has more promoted development and the application of lithium battery industry.
The cathode lead-out structure of the existing relative maturity of current small-sized steel shell lithium battery, it is simply that the negative lug of battery core and box hat DC energy storage are welded on interior survey and weld, weld very reliable.Large-scale steel shell lithium battery is also draw by same method, but in order to battery is easy to assembly, generally has leading-out terminal at the positive and negative two ends of battery, utilizes terminal to weld or bolt connects.
The way of extraction electrode terminal routine is to rush circular hole or square hole bottom box hat, it is assemblied in bottom box hat with felt pad material and screw nut again, the negative lug stored energy welding of last battery core is welded in stud base and forms negative pole exit, therefore assembly space is limited, workpiece is it is difficult to ensure that technological requirement, cause the phenomenon of leakage of certain probability, use because electrokinetic cell is formed set of cells by the series-parallel method of a lot of cells, one battery, because leakage can cause whole Battery pack to use, loses bigger.
Summary of the invention
For solving the problems referred to above, the invention provides and a kind of directly utilize the welded nut negative pole leading-out terminal as battery, mechanism is simple, safe and reliable, thoroughly solves the technical scheme of battery cathode end leakage problem:
A kind of lithium-ion battery cathode-post deriving structure, including hollow cylinder battery steel shell, cylinder conductive seat it is provided with inside battery steel shell, conductive seat axial centre position is fixing connects negative terminal, negative terminal passes from battery steel shell bottom through-hole, pass battery steel shell surface at negative terminal and be provided with screw thread, screw thread is rotary with the welded nut of correspondence as negative pole leading-out terminal.
Further, welded nut bottom outer surface is additionally provided with cylinder salient point, and salient point is that salient point upper surface and welded nut bottom lower surface are welded to connect highly for the cylinder of 0.2-0.4mm.
Further, salient point is N >=2, is evenly distributed on welded nut central point for the center of circle, and radius is on the circumference of 0.5-1.2mm.
The resistance butt-joint method resistance butt-joint method step realizing lithium-ion battery cathode-post deriving structure is as follows:
(1) pretreatment, arranges salient point on the bottom lower surface of described welded nut；
(2) welded nut is individually positioned on the relative chuck of butt-weld device with battery steel shell, clears up the profile of described welded nut and battery steel shell and the surface of butt-joint salient point；
(3) move welded nut or battery steel shell, make one end of battery steel shell mutually can push against with butt-joint salient point；
(4) it is 150-250A by relative chuck turn-on current, electric current is directed at through relative chuck on welded nut and battery steel shell, the high temperature of 2000-4000 DEG C is produced by contact surface, when welded nut and battery steel shell reach the plastic state of 1400-1700 DEG C, press in mobile terminal and press the top that makes battery steel shell and engage with salient point extruding；
(5) after the seamless fusion of butt-joint salient point of the top of battery steel shell and welded nut, cutting off the power supply of relative chuck, butt-joint is complete, dismantles welding finished product.
The beneficial effects of the present invention is:
(1) present invention directly utilizes the welded nut negative pole leading-out terminal as battery, and mechanism is simple, safe and reliable, and thoroughly solves the problem of battery cathode end leakage.
(2) salient point in the present invention is divided into and multiple is evenly distributed on welded nut lower surface, the good airproof performance between welded nut and battery steel shell after welding.
(3) present invention adopt salient point replace the locating slot in traditional resistor butt-joint, it is ensured that welded nut precision will not reduce.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the partial enlarged drawing of the present invention.
Detailed description of the invention
For making the goal of the invention of the present invention, technical scheme and advantage clearly, below in conjunction with accompanying drawing, embodiments of the present invention are described in further detail.
As shown in Figure 1-2, lithium-ion battery cathode-post deriving structure, including hollow cylinder battery steel shell 1, battery steel shell 1 is internal is provided with cylinder conductive seat 2, conductive seat 2 axial centre position is fixing connects negative terminal 3, negative terminal 3 passes from battery steel shell 1 top through hole, passing battery steel shell 1 surface at negative terminal 3 and being provided with screw thread of novelty, screw thread is rotary with the welded nut 4 of correspondence as negative pole leading-out terminal.
Meanwhile, being additionally provided with cylinder salient point 5 at welded nut 4 bottom outer surface, salient point 5 is that salient point 5 upper surface and welded nut 4 bottom lower surface are welded to connect highly for the cylinder of 0.2-0.4mm.Here salient point 5 is 4, is evenly distributed on welded nut 4 central point for the center of circle, and radius is on the circumference of 0.5-1.2mm.Not only play the effect of location in welding process bumps 5, at high temperature salient point 5 deforms upon, it is also possible to serve as in the gap that solder is filled up between welded nut 4 and battery steel shell 1, improves the seal of lithium battery, the problem thoroughly solving battery cathode end leakage.
In resistance butt-joint process, first at the bottom lower surface of welded nut 4 with welded nut 4 central point for the center of circle, radius is the salient point that height provided circumferentially about is 0.5-1.2mm 5 of 8-10mm, again welded nut 4 is individually positioned on the relative chuck of butt-weld device with battery steel shell 1, clear up the profile of described welded nut 4 and battery steel shell 1 and the surface of butt-joint salient point 5, mobile welded nut 4 or battery steel shell 1, make one end of battery steel shell 1 mutually can push against with butt-joint salient point 5.
Then it is 150-250A by relative chuck turn-on current, electric current is directed at through relative chuck on welded nut 4 and battery steel shell 1, the high temperature of 2000-4000 DEG C is produced by contact surface, when welded nut 4 and battery steel shell 1 reach the plastic state of 1400-1700 DEG C, press in mobile terminal and press the top that makes battery steel shell 1 and engage with salient point 5 extruding, behind the top of battery steel shell 1 with the seamless fusion of butt-joint salient point 5 of welded nut 4, cut off the power supply of relative chuck, butt-joint is complete, dismounting welding finished product, completes the manufacture of lithium-ion battery cathode-post deriving structure.Its step is simple, easy, and the production efficiency of product is high.
Claims (1)
1. the resistance butt-joint method of a lithium-ion battery cathode-post deriving structure, described lithium-ion battery cathode-post deriving structure includes hollow cylinder battery steel shell, cylinder conductive seat it is provided with inside battery steel shell, conductive seat axial centre position is fixing connects negative terminal, negative terminal passes from battery steel shell bottom through-hole, pass battery steel shell surface at negative terminal and be provided with screw thread, screw thread is rotary with the welded nut of correspondence as negative pole leading-out terminal, it is characterised in that: described resistance butt-joint method step is as follows:
(1) pretreatment, arranges salient point on the bottom lower surface of described welded nut；
(2) welded nut is individually positioned on the relative chuck of butt-weld device with battery steel shell, clears up the profile of described welded nut and battery steel shell and the surface of butt-joint salient point；
(3) move welded nut or battery steel shell, make one end of battery steel shell mutually can push against with butt-joint salient point；
(4) it is 150-250A by relative chuck turn-on current, electric current is directed at through relative chuck on welded nut and battery steel shell, the high temperature of 2000-4000 DEG C is produced by contact surface, when welded nut and battery steel shell reach the plastic state of 1400-1700 DEG C, press in mobile terminal and press the top that makes battery steel shell and engage with salient point extruding；
(5) after the seamless fusion of butt-joint salient point of the top of battery steel shell and welded nut, cutting off the power supply of relative chuck, butt-joint is complete, dismantles welding finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410447509.0A CN104332579B (en) | 2014-09-04 | 2014-09-04 | A kind of lithium-ion battery cathode-post deriving structure and resistance butt-joint method |
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| CN201410447509.0A CN104332579B (en) | 2014-09-04 | 2014-09-04 | A kind of lithium-ion battery cathode-post deriving structure and resistance butt-joint method |
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| CN104332579A CN104332579A (en) | 2015-02-04 |
| CN104332579B true CN104332579B (en) | 2016-06-29 |
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| CN105390630B (en) * | 2015-11-11 | 2018-07-31 | 浙江兴海能源科技股份有限公司 | A kind of negative electrode of lithium ion battery terminal deriving structure and preparation method thereof |
| CN107498454A (en) * | 2017-09-21 | 2017-12-22 | 南安市友和五金制品有限公司 | A kind of manufacture craft of abrasive disk |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202333025U (en) * | 2011-11-01 | 2012-07-11 | 中国电子科技集团公司第十八研究所 | Protective cap for threaded pole of lithium ion single battery |
| CN202513227U (en) * | 2012-04-09 | 2012-10-31 | 温岭市恒泰电池有限公司 | Electrode leading-out structure for lithium battery |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3707109B2 (en) * | 1995-09-27 | 2005-10-19 | ソニー株式会社 | Secondary battery |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202333025U (en) * | 2011-11-01 | 2012-07-11 | 中国电子科技集团公司第十八研究所 | Protective cap for threaded pole of lithium ion single battery |
| CN202513227U (en) * | 2012-04-09 | 2012-10-31 | 温岭市恒泰电池有限公司 | Electrode leading-out structure for lithium battery |
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Effective date of registration: 20170605 Address after: 226463 Zhongtian village, Hekou Town, Rudong County, Jiangsu, Nantong Patentee after: Zhongtian Science and Technology Co., Ltd., Jiangsu Address before: Hongxing economic and Technological Development Zone, Jiangsu province Nantong City Road 226000 No. 36 Patentee before: ZHONGTIAN ENERGY STORAGE TECHNOLOGY CO., LTD. |
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Effective date of registration: 20180115 Address after: Hongxing economic and Technological Development Zone, Jiangsu province Nantong City Road 226000 No. 36 Co-patentee after: Zhongtian Science and Technology Co., Ltd., Jiangsu Patentee after: ZHONGTIAN ENERGY STORAGE TECHNOLOGY CO., LTD. Address before: Hongxing Road 226000 Jiangsu Nantong economic and Technological Development Zone No. 36 Patentee before: ZHONGTIAN ENERGY STORAGE TECHNOLOGY CO., LTD. |
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Inventor after: Jiu Yonghua Inventor after: Wang Xiaofeng Inventor after: Xue Chi Inventor after: Zhao Yingjun Inventor before: Wang Xiaofeng Inventor before: Xue Chi Inventor before: Zhao Yingjun Inventor before: Jiu Yonghua |