CN107331804A - A kind of electrokinetic cell, its sealing nail and its welding method - Google Patents

A kind of electrokinetic cell, its sealing nail and its welding method Download PDF

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Publication number
CN107331804A
CN107331804A CN201710517849.XA CN201710517849A CN107331804A CN 107331804 A CN107331804 A CN 107331804A CN 201710517849 A CN201710517849 A CN 201710517849A CN 107331804 A CN107331804 A CN 107331804A
Authority
CN
China
Prior art keywords
top cover
sealing nail
welding
sealing
nail
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.)
Pending
Application number
CN201710517849.XA
Other languages
Chinese (zh)
Inventor
钱德宇
徐作斌
刘昊
冯伟贤
胡勇
高云峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Han s Laser Technology Industry Group Co Ltd
Original Assignee
Han s Laser Technology Industry Group Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Han s Laser Technology Industry Group Co Ltd filed Critical Han s Laser Technology Industry Group Co Ltd
Priority to CN201710517849.XA priority Critical patent/CN107331804A/en
Publication of CN107331804A publication Critical patent/CN107331804A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/183Sealing members
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20Bonding
    • B23K26/21Bonding by welding
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/147Lids or covers
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

The present invention proposes a kind of electrokinetic cell, its sealing nail and its welding method, and sealing nail includes:Main body , Cheng Cone mesa-shaped;And flange, stretched out by the top of the main body is circumferentially outer.The welding method includes the main body for sealing nail being housed in the accepting groove at the liquid injection hole of the top cover of electrokinetic cell, the flange that the sealing is followed closely is ridden in the mounting surface with the top cover, sealing nail is combined with the top cover using laser fuU penetration welding.Welding efficiency can be greatly improved.

Description

A kind of electrokinetic cell, its sealing nail and its welding method
Technical field
The present invention relates to the laser processing of laser processing, more particularly to electrokinetic cell.
Background technology
Referring to Fig. 1 to Fig. 3, design liquid injection hole would generally be reserved on the top cover 10 of single power battery as injection electrolyte Entrance, and at liquid injection hole be provided with accepting groove.Wherein, liquid injection hole can correspond to insertion glue nail 20, and accepting groove can correspond to and house close Envelope nail 30.Sealing nail 30 welds together with top cover 10.Existing sealing nail 30 is general in conoid type, the bottom surface of sealing nail 30 302 are used to coordinate with glue nail 20 provided with groove 303.The side 305 of sealing nail 30 is the conical surface, the tapered sidewalls with accepting groove Coordinate.When in the accepting groove being installed on top cover 10 in place, sealing nail 30 can fill up the accepting groove, the top surface of sealing nail 30 301 is concordant with the top surface 101 of top cover 10.30 structures are followed closely in this sealing, and its welding position with top cover 10, is in sealing nail 30 Top surface 301 and top cover 10 top surface 101 circular bonding crack at, namely pad 40 is located at the side 305 of sealing nail 30 Top.
If carrying out butt welding using continuous wave laser, with the increase of heat input, remained in liquid injection hole Electrolyte can decomposite gas in the presence of high energy laser beam, cause the sealed rear chamber body for adding glue nail 20 and sealing nail 30 Interior air pressure is too high, and easily combining closed place in circular weld joint head and the tail forms the quick-fried point of weld seam, causes sealing nail 30 closed not cause Product defects.Therefore, the bond pattern of sealing nail 30 and top cover 10 is generally to carry out butt welding using pulse laser, such as This one, due to seal to be ensured, speed of welding is less efficient typically within 3mm/s~8mm/s.
The content of the invention
The technical problem to be solved in the present invention is, for the drawbacks described above of prior art, proposes a kind of electrokinetic cell Sealing nail and its welding method, can greatly improve welding efficiency.
The technical solution adopted for the present invention to solve the technical problems is:A kind of sealing nail of electrokinetic cell is provided, it is wrapped Include:Main body , Cheng Cone mesa-shaped;And flange, stretched out by the top of the main body is circumferentially outer.
Wherein, the main body has top surface, bottom surface and the side of taper, and the wherein bottom surface is provided with groove.
The technical solution adopted for the present invention to solve the technical problems is still:A kind of electrokinetic cell is provided, including top cover and Sealing nail;Wherein, sealing nail is as described above, the flange of sealing nail is combined with the top cover using laser fuU penetration welding.
The technical solution adopted for the present invention to solve the technical problems is still:A kind of weldering of the sealing nail of electrokinetic cell is provided Method is connect, it includes:The main body of sealing nail as described above is housed in the accepting groove at the liquid injection hole of the top cover of electrokinetic cell In, the flange that the sealing is followed closely is ridden in the mounting surface with the top cover, sealing nail and the top cover knot are made using laser fuU penetration welding It is combined together.
Wherein, make welding track that there is lead-in and lead-out wire.
Wherein, before laser fuU penetration welding is implemented, the relative top cover positioning of sealing nail is first made using spot welding, then draw weldering Integrate with the shape of mark.
Wherein, before the relative top cover positioning of sealing nail is made using spot welding, first using the receipts of the laser cleaning top cover Tank position.
Wherein, described laser fuU penetration welding is made to use 1KW optical fiber laser.
Wherein, the changed power scope for making described optical fiber laser is 700W~1000W.
Wherein, the velocity interval for making described optical fiber laser is 50mm/s~80mm/s;Make described optical fiber laser Defocusing amount scope be 0mm~+2mm.
The beneficial effects of the present invention are seal the structure of nail by improving, increase flange, and then the welding that will seal nail Mode is changed to penetrate welding, not only to positioning accuracy request reduction, greatly improves production efficiency;In addition, penetrating welding manner phase For butt welding mode, adaptability is stronger, can greatly avoid sealing nail and quick-fried phenomenon at the sealing of top cover, greatly improve Yields.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the schematic perspective view of existing sealing nail;
Fig. 2 is the fit structure schematic diagram of existing sealing nail and top cover;
Fig. 3 is existing sealing nail and the design sketch of top cover butt welding;
Fig. 4 is the schematic perspective view of present invention sealing nail;
Fig. 5 is the fit structure schematic diagram of present invention sealing nail and top cover;
Fig. 6 is the exploded perspective view of present invention sealing nail and the fit structure of top cover;
Fig. 7 is the welding track that present invention sealing nail penetrates weldering with top cover;
Fig. 8 is the design sketch that present invention sealing nail penetrates weldering with top cover.
Wherein, Main Reference Numerals are as follows:The glue of 10 top cover, 101 top surface, 103 liquid injection hole, 105 accepting groove 20 nail 30 is sealed Follow closely the welding track 501 of the side of 301 top surface, 302 bottom surface, 303 groove 305 306 main body, 307 flange, 40 solder joint 50 and introduce line 502 lead-out wires.
Embodiment
In conjunction with accompanying drawing, presently preferred embodiments of the present invention is elaborated.
Referring to Fig. 4, Fig. 4 is the schematic perspective view of present invention sealing nail.The present invention proposes a kind of electrokinetic cell, and it includes close Envelope nail 30, sealing nail 30 includes:Main body 306 and flange 307.Wherein, the main body 306 and the structure of the sealing nail shown in Fig. 1 Similar , Cheng Cone mesa-shaped, the side 305 with top surface 301, bottom surface 302 and taper, bottom surface 302 is provided with groove 303.The flange 307 are circumferentially stretched out outside on the top of the main body 306.
With reference to referring to Fig. 5 and Fig. 6, Fig. 5 is the fit structure schematic diagram of present invention sealing nail and top cover;Fig. 6 is the present invention The exploded perspective view of sealing nail and the fit structure of top cover.Sealing nail 30 is attached to one with top cover 10 using laser fuU penetration welding Rise.Wherein, in liquid injection hole 103 of the correspondence plug of glue nail 20 on the top cover 10.The main body 306 correspondence is housed in the receipts on top cover 10 In tank 105.The flange 307 is ridden on the top surface 101 of the top cover 10.Top surface of the top surface above the top cover 10 of sealing nail 30 One setting height, the setting height is the thickness of the flange 307.
With reference to referring to Fig. 7 and Fig. 8, Fig. 7 is the welding track that present invention sealing nail penetrates weldering with top cover;Fig. 8 is the present invention Sealing nail penetrates the design sketch of weldering with top cover.Sealing nail 30 is penetrated into the process together with being soldered to top cover 10 includes:First, via After the injection electrolyte of liquid injection hole 103, glue nail 20 is filled at once prevents dust from entering;Then, with laser cleaning accepting groove 105 Put, with the electrolyte that removes residual, (due to being to implement laser penetration welding mode in the outside of accepting groove 105, the step is simultaneously Necessarily);Then, the installing of sealing nail 30 in place, first spot welding fixing seal nail 30, prevents from tilting in welding process, general point Weld three points;Then, the shape of welding track is drawn on welding control software, welding track 50, which has, to be introduced line 501 and draw Outlet 502, i.e. welding track 50 are in α shapes;Finally, laser fuU penetration welding is implemented.Welding can be prevented effectively from using bond pattern is penetrated Without cleaning after perforated phenomenon and injection electrolyte, welding yield can be greatly promoted.
It is noted that welding condition preferably uses higher speed, positive out of focus 2mm.For example:Using 1KW Optical fiber laser when, technological parameter:Changed power scope be 700W~1000W, velocity interval be 50mm/s~80mm/s, from Jiao's amount scope is 0mm~+2mm.
The beneficial effects of the present invention are by improving sealing 30 structures of nail, increase flange 307, and then will seal nail 30 Welding manner be changed to penetrate welding, not only to positioning accuracy request reduction, and production efficiency can be greatly improved;In addition, Welding manner is penetrated relative to butt welding mode, adaptability is stronger, can greatly avoid the sealing of sealing nail 30 and top cover 10 Locate quick-fried phenomenon, greatly improve yields.
It is noted that in the present embodiment, the flange 307 of sealing nail 30 is the top surface 101 for riding over the top cover 10 On, that is to say, that the top cover 10 is the mounting surface using top surface 101 as the flange 307 for overlapping sealing nail 30, so as to show Appearance of the top surface 301 higher than the top surface 101 of top cover 10 of sealing nail 30.In other embodiments, can be by the top cover 10 Mounting surface opposing top 101 recessed one be sized, so as to the top of the top surface 301 and the top cover 10 that show sealing nail 30 The appearance of the flush of face 101, it might even be possible to be outward appearance effect of the top surface 301 less than the top surface 101 of top cover 10 of sealing nail 30 Really.In addition, in the present embodiment, the combination between the flange 307 of sealing nail 30 and the top surface 101 of the top cover 10 is two water Overlap joint between plane;In other embodiments, the combination between the flange 307 of sealing nail 30 and the faying surface of the top cover 10 Two horizontal planes are need not necessarily be limited to, such as:Can be two inclined-planes for having certain inclination angle (such as 10 degree);Again such as:Can be Two male and fomale(M&F)s or curved surface cooperated.
It should be appreciated that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations, to ability For field technique personnel, the technical scheme described in above-described embodiment can be modified, or it is special to which part technology Levy carry out equivalent substitution;And these modifications and replacement, it should all belong to the protection domain of appended claims of the present invention.

Claims (10)

1. a kind of sealing nail of electrokinetic cell, it is characterised in that including:Main body , Cheng Cone mesa-shaped;And flange, by the top of the main body End is circumferentially outer to be stretched out.
2. sealing nail according to claim 1, it is characterised in that:The main body has top surface, bottom surface and the side of taper, its In the bottom surface be provided with groove.
3. a kind of electrokinetic cell, including top cover and sealing are followed closely;Characterized in that, sealing nail is as claimed in claim 1 or 2, should The flange of sealing nail is combined with the top cover using laser fuU penetration welding.
4. a kind of welding method of the sealing nail of electrokinetic cell, it is characterised in that including:Will be as claimed in claim 1 or 2 close The main body of envelope nail is housed in the accepting groove at the liquid injection hole of the top cover of electrokinetic cell, the flange that the sealing is followed closely is ridden over and the top In the mounting surface of lid, sealing nail is set to be combined with the top cover using laser fuU penetration welding.
5. method according to claim 4, it is characterised in that:Make welding track that there is lead-in and lead-out wire.
6. method according to claim 5, it is characterised in that:Before laser fuU penetration welding is implemented, this is first made using spot welding The relative top cover positioning of sealing nail, then draw the shape of welding track.
7. method according to claim 6, it is characterised in that:The relative top cover of sealing nail is set to position it using spot welding Before, first using the collecting groove location of the laser cleaning top cover.
8. the method according to any one of claim 4 to 7, it is characterised in that:Make described laser fuU penetration welding using 1KW's Optical fiber laser.
9. method according to claim 8, it is characterised in that:The changed power scope for making described optical fiber laser is 700W~1000W.
10. method according to claim 8, it is characterised in that:The velocity interval for making described optical fiber laser is 50mm/ S~80mm/s;The defocusing amount scope for making described optical fiber laser is 0mm~+2mm.
CN201710517849.XA 2017-06-29 2017-06-29 A kind of electrokinetic cell, its sealing nail and its welding method Pending CN107331804A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710517849.XA CN107331804A (en) 2017-06-29 2017-06-29 A kind of electrokinetic cell, its sealing nail and its welding method

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Application Number Priority Date Filing Date Title
CN201710517849.XA CN107331804A (en) 2017-06-29 2017-06-29 A kind of electrokinetic cell, its sealing nail and its welding method

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CN107331804A true CN107331804A (en) 2017-11-07

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107953029A (en) * 2017-12-29 2018-04-24 大族激光科技产业集团股份有限公司 Welder and welding method
CN108054308A (en) * 2017-12-04 2018-05-18 东软集团股份有限公司 The installed part and assembling assembly of high-pressure insert
CN109037582A (en) * 2018-08-01 2018-12-18 武汉逸飞激光设备有限公司 Method of completing the square is bound in a kind of sealing
CN111037098A (en) * 2019-12-27 2020-04-21 芜湖天弋能源科技有限公司 Method for repairing various welding seam defects of laser welding of power battery sealing nail
CN112207438A (en) * 2020-09-30 2021-01-12 珠海冠宇电池股份有限公司 Welding assembly and welding method
CN112510327A (en) * 2020-12-22 2021-03-16 北京理工大学深圳汽车研究院(电动车辆国家工程实验室深圳研究院) Power battery and sealing method thereof
CN113695737A (en) * 2021-07-14 2021-11-26 武汉逸飞激光股份有限公司 Welding method for sealing nail of power battery
CN114074220A (en) * 2020-08-20 2022-02-22 大族激光科技产业集团股份有限公司 Laser welding method for power battery and sealing nail thereof
CN114147348A (en) * 2021-12-23 2022-03-08 深圳市海目星激光智能装备股份有限公司 Laser welding method for sealing nail
CN114932314A (en) * 2022-06-01 2022-08-23 武汉逸飞激光股份有限公司 Laser welding method for sealing nail
WO2022262351A1 (en) * 2021-06-15 2022-12-22 宁德时代新能源科技股份有限公司 Cleaning apparatus, battery cell, electrical device and battery cell processing method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020004168A1 (en) * 1998-09-11 2002-01-10 Mikio Iwata Battery having electrolyte injecting plug
JP2008041548A (en) * 2006-08-09 2008-02-21 Sanyo Electric Co Ltd Nonaqueous electrolyte secondary battery
CN102376932A (en) * 2010-08-06 2012-03-14 日立麦克赛尔能源株式会社 Sealed battery
CN203918232U (en) * 2014-06-16 2014-11-05 浙江金开来新能源科技有限公司 A kind of laser penetration water-tight equipment of lithium battery
CN204809306U (en) * 2015-07-15 2015-11-25 宁德时代新能源科技有限公司 Secondary cell's notes liquid hole weld assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020004168A1 (en) * 1998-09-11 2002-01-10 Mikio Iwata Battery having electrolyte injecting plug
JP2008041548A (en) * 2006-08-09 2008-02-21 Sanyo Electric Co Ltd Nonaqueous electrolyte secondary battery
CN102376932A (en) * 2010-08-06 2012-03-14 日立麦克赛尔能源株式会社 Sealed battery
CN203918232U (en) * 2014-06-16 2014-11-05 浙江金开来新能源科技有限公司 A kind of laser penetration water-tight equipment of lithium battery
CN204809306U (en) * 2015-07-15 2015-11-25 宁德时代新能源科技有限公司 Secondary cell's notes liquid hole weld assembly

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108054308A (en) * 2017-12-04 2018-05-18 东软集团股份有限公司 The installed part and assembling assembly of high-pressure insert
CN107953029A (en) * 2017-12-29 2018-04-24 大族激光科技产业集团股份有限公司 Welder and welding method
CN109037582A (en) * 2018-08-01 2018-12-18 武汉逸飞激光设备有限公司 Method of completing the square is bound in a kind of sealing
CN111037098A (en) * 2019-12-27 2020-04-21 芜湖天弋能源科技有限公司 Method for repairing various welding seam defects of laser welding of power battery sealing nail
CN114074220A (en) * 2020-08-20 2022-02-22 大族激光科技产业集团股份有限公司 Laser welding method for power battery and sealing nail thereof
CN112207438A (en) * 2020-09-30 2021-01-12 珠海冠宇电池股份有限公司 Welding assembly and welding method
CN112510327A (en) * 2020-12-22 2021-03-16 北京理工大学深圳汽车研究院(电动车辆国家工程实验室深圳研究院) Power battery and sealing method thereof
WO2022262351A1 (en) * 2021-06-15 2022-12-22 宁德时代新能源科技股份有限公司 Cleaning apparatus, battery cell, electrical device and battery cell processing method
CN113695737A (en) * 2021-07-14 2021-11-26 武汉逸飞激光股份有限公司 Welding method for sealing nail of power battery
CN114147348A (en) * 2021-12-23 2022-03-08 深圳市海目星激光智能装备股份有限公司 Laser welding method for sealing nail
CN114932314A (en) * 2022-06-01 2022-08-23 武汉逸飞激光股份有限公司 Laser welding method for sealing nail

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Application publication date: 20171107