CN104332579A - Lithium ion battery negative pole leading structure and resistance butt welding method - Google Patents
Lithium ion battery negative pole leading structure and resistance butt welding method Download PDFInfo
- Publication number
- CN104332579A CN104332579A CN201410447509.0A CN201410447509A CN104332579A CN 104332579 A CN104332579 A CN 104332579A CN 201410447509 A CN201410447509 A CN 201410447509A CN 104332579 A CN104332579 A CN 104332579A
- Authority
- CN
- China
- Prior art keywords
- steel shell
- battery
- battery steel
- welded nut
- salient point
- 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.)
- Granted
Links
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 16
- 238000003466 welding Methods 0.000 title claims abstract description 16
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 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
- 230000004927 fusion Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 239000003792 electrolyte Substances 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract 1
- 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
- 238000000605 extraction Methods 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
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000009413 insulation 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
The invention discloses a lithium ion battery negative pole leading structure and a resistance butt welding method. The lithium ion battery negative pole leading structure comprises a hollow cylindrical battery steel shell, a cylindrical conductive seat is arranged in the battery steel shell, the axial center position of the conductive seat is fixedly connected with a negative pole, the negative pole traverses out of the bottom of the battery steel shell, the side surface of the part of the negative pole out of the battery steel shell is provided with a screw thread, and the screw thread is provided with a corresponding welding nut as a positive leading terminal. Bumps in the invention are uniformly distributed on the lower surface of the welding nut, the sealing between the welding nut and the battery steel shell is good after welding, and the welding nut is directly used as the negative leading terminal of the above battery, so the structure is simple, safe and reliable, and the problem of electrolyte leakage of the negative electrode of the battery is thoroughly solved. The bumps are adopted to substitute positioning grooves in traditional resistance butt welding, so the precision of the welding nut does not decrease.
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 great inventor Edison, uses following reaction: this reaction of Li+MnO2=LiMnO2 is redox reaction, electric discharge.Because the chemical characteristic of lithium metal is very active, make the processing of lithium metal, preservation, use, very high to environmental requirement.So lithium battery is not applied for a long time.Along with the development of science and technology, present lithium battery becomes main flow.
In order to develop the more excellent kind of performance, people are studied various material.Thus produce unprecedented product.Such as, lithium sulfur dioxide cell and lithium thionyl chloride cell just very have feature.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 promotes the development of non-aqueous system electrochemical theory.Except using various nonaqueous solvents, people have also carried out the research of polymer thin film battery.
Lithium battery is widely used in the accumulation power supply systems such as waterpower, firepower, wind-force and solar power station, the uninterrupted power supply of post and telecommunications, and multiple field such as 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 is as laptop computer, video camera, mobile communication.The high capacity lithium ion battery of exploitation has started to try out in electric automobile, estimates one of major impetus power supply becoming 21 century electric automobile, and will be applied in artificial satellite, Aero-Space and energy storage.Along with the in short supply of the energy and the pressure of 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.
Current small-sized steel shell lithium battery has the cathode lead-out structure of relative maturity, exactly the negative lug of battery core and box hat DC energy storage is welded on interior survey welding, welds very reliable.Large-scale steel shell lithium battery is also the extraction that uses the same method, but in order to battery easy to assembly, usually have leading-out terminal at the positive and negative two ends of battery, utilize terminal to weld or bolt connect.
The way of extraction electrode terminal routine is bottom box hat, rush circular hole or square hole, be assemblied in bottom box hat with insulation cushion 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 difficult to ensure technological requirement, cause the phenomenon of leakage of certain probability, use because electrokinetic cell forms battery pack by the series-parallel method of a lot of cell, a battery, because leakage can cause whole Battery pack to use, loses larger.
Summary of the invention
For solving the problem, the invention provides a kind of welded nut that directly utilizes as the negative pole leading-out terminal of 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, comprise hollow cylinder battery steel shell, battery steel shell inside is provided with cylinder conductive seat, conductive seat axial centre position is fixedly connected with 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 corresponding welded nut as negative pole leading-out terminal.
Further, welded nut bottom outer surface is also provided with cylinder salient point, and salient point is be highly the cylinder of 0.2-0.4mm, and salient point upper surface and welded nut bottom lower surface are welded to connect.
Further, salient point is N >=2, is evenly distributed on welded nut central point for the center of circle, radius be 0.5-1.2mm circumferentially.
The resistance butt-joint method resistance butt-joint method step realizing lithium-ion battery cathode-post deriving structure is as follows:
(1) preliminary treatment, the bottom lower surface of described welded nut arranges salient point;
(2) welded nut is placed on the relative chuck of butt-weld device respectively 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) mobile welded nut or battery steel shell, makes one end of battery steel shell mutually can push against with butt-joint salient point;
(4) be 150-250A by relative chuck making current, electric current is directed on welded nut and battery steel shell through relative chuck, the high temperature of 2000-4000 DEG C is produced by contact-making surface, when welded nut and battery steel shell reach the plastic state of 1400-1700 DEG C, pressing in mobile terminal to press makes the top of battery steel shell extrude with salient point to engage;
(5) behind the top of battery steel shell and the seamless fusion of butt-joint salient point of welded nut, cut off the power supply of relative chuck, butt-joint is complete, dismounting welding finished product.
Beneficial effect of the present invention is:
(1) the present invention directly utilizes welded nut as the negative pole leading-out terminal of 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 is multiplely evenly distributed on welded nut lower surface, the good airproof performance after welding between welded nut and battery steel shell.
(3) adopt the location notch in the butt-joint of salient point replacement traditional resistor in the present invention, ensure that welded nut precision can not reduce.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is partial enlarged drawing of the present invention.
Embodiment
For making 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, comprise hollow cylinder battery steel shell 1, battery steel shell 1 inside is provided with cylinder conductive seat 2, conductive seat 2 axial centre position is fixedly connected with negative terminal 3, negative terminal 3 passes from battery steel shell 1 top through hole, and passing battery steel shell 1 surface at negative terminal 3 and being provided with screw thread of novelty, screw thread is rotary with corresponding welded nut 4 as negative pole leading-out terminal.
Meanwhile, be also provided with cylinder salient point 5 at welded nut 4 bottom outer surface, salient point 5 is be highly the cylinder of 0.2-0.4mm, and salient point 5 upper surface and welded nut 4 bottom lower surface are welded to connect.Here salient point 5 is 4, is evenly distributed on welded nut 4 central point for the center of circle, radius be 0.5-1.2mm circumferentially.The effect of location is not only played in welding process bumps 5, at high temperature there is deformation in salient point 5, can also serve as in the gap that solder fills up between welded nut 4 and battery steel shell 1, improve the seal of lithium battery, thoroughly solve the problem of 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, the salient point 5 of radius to be the circumferentially rational height of 8-10mm be 0.5-1.2mm, again welded nut 4 and battery steel shell 1 are placed on the relative chuck of butt-weld device respectively, 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 be 150-250A by relative chuck making current, electric current is directed on welded nut 4 and battery steel shell 1 through relative chuck, the high temperature of 2000-4000 DEG C is produced by contact-making surface, when welded nut 4 and battery steel shell 1 reach the plastic state of 1400-1700 DEG C, press in mobile terminal to press and the top of battery steel shell 1 is extruded with salient point 5 engage, behind the top of battery steel shell 1 and 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, and easy, the production efficiency of product is high.
Claims (4)
1. a lithium-ion battery cathode-post deriving structure, comprise hollow cylinder battery steel shell, battery steel shell inside is provided with cylinder conductive seat, conductive seat axial centre position is fixedly connected with negative terminal, negative terminal passes from battery steel shell bottom through-hole, it is characterized in that: pass battery steel shell surface at negative terminal and be provided with screw thread, screw thread is rotary with corresponding welded nut as negative pole leading-out terminal.
2. lithium-ion battery cathode-post deriving structure according to claim 1, it is characterized in that: described welded nut bottom outer surface is also provided with cylinder salient point, described salient point is be highly the cylinder of 0.2-0.4mm, and salient point upper surface and welded nut bottom lower surface are welded to connect.
3. lithium-ion battery cathode-post deriving structure according to claim 2, is characterized in that: described salient point is N >=2, is evenly distributed on welded nut central point for the center of circle, radius be 0.5-1.2mm circumferentially.
4. realize a resistance butt-joint method for lithium-ion battery cathode-post deriving structure described in claim 1, it is characterized in that: described resistance butt-joint method step is as follows:
(1) preliminary treatment, the bottom lower surface of described welded nut arranges salient point;
(2) welded nut is placed on the relative chuck of butt-weld device respectively 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) mobile welded nut or battery steel shell, makes one end of battery steel shell mutually can push against with butt-joint salient point;
(4) be 150-250A by relative chuck making current, electric current is directed on welded nut and battery steel shell through relative chuck, the high temperature of 2000-4000 DEG C is produced by contact-making surface, when welded nut and battery steel shell reach the plastic state of 1400-1700 DEG C, pressing in mobile terminal to press makes the top of battery steel shell extrude with salient point to engage;
(5) behind the top of battery steel shell and the seamless fusion of butt-joint salient point of welded nut, cut off the power supply of relative chuck, butt-joint is complete, dismounting 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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104332579A true CN104332579A (en) | 2015-02-04 |
| CN104332579B CN104332579B (en) | 2016-06-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410447509.0A Active CN104332579B (en) | 2014-09-04 | 2014-09-04 | A kind of lithium-ion battery cathode-post deriving structure and resistance butt-joint method |
Country Status (1)
| Country | Link |
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| CN (1) | CN104332579B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105390630A (en) * | 2015-11-11 | 2016-03-09 | 浙江兴海能源科技有限公司 | Positive electrode terminal lead-out structure of lithium ion battery and preparation method for positive electrode terminal lead-out structure |
| 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 (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0992238A (en) * | 1995-09-27 | 1997-04-04 | Sony Corp | Secondary battery |
| 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 |
-
2014
- 2014-09-04 CN CN201410447509.0A patent/CN104332579B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0992238A (en) * | 1995-09-27 | 1997-04-04 | Sony Corp | Secondary battery |
| 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105390630A (en) * | 2015-11-11 | 2016-03-09 | 浙江兴海能源科技有限公司 | Positive electrode terminal lead-out structure of lithium ion battery and preparation method for positive electrode terminal lead-out structure |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104332579B (en) | 2016-06-29 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
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: 20170719 Address after: Hongxing Road 226000 Jiangsu Nantong economic and Technological Development Zone No. 36 Patentee after: ZHONGTIAN ENERGY STORAGE TECHNOLOGY CO., LTD. Address before: 226463 Zhongtian village, Hekou Town, Rudong County, Jiangsu, Nantong Patentee before: Zhongtian Science and Technology Co., Ltd., Jiangsu |
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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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| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
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 |