CN100391032C - Aluminium-casing lithium ion cell core with antiexplosion film - Google Patents
Aluminium-casing lithium ion cell core with antiexplosion film Download PDFInfo
- Publication number
- CN100391032C CN100391032C CNB2004100379245A CN200410037924A CN100391032C CN 100391032 C CN100391032 C CN 100391032C CN B2004100379245 A CNB2004100379245 A CN B2004100379245A CN 200410037924 A CN200410037924 A CN 200410037924A CN 100391032 C CN100391032 C CN 100391032C
- Authority
- CN
- China
- Prior art keywords
- electric core
- rupture pressure
- pressure disc
- ion electric
- aluminum hull
- 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.)
- Expired - Fee Related
Links
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 33
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 36
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 36
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 31
- 239000010959 steel Substances 0.000 claims abstract description 31
- 238000005476 soldering Methods 0.000 claims description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 239000011889 copper foil Substances 0.000 claims description 8
- 239000003292 glue Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 238000013016 damping Methods 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 230000003064 anti-oxidating effect Effects 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 229910000679 solder Inorganic materials 0.000 claims description 2
- 238000009740 moulding (composite fabrication) Methods 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000012528 membrane Substances 0.000 abstract 4
- 238000012769 bulk production Methods 0.000 abstract 1
- 230000006837 decompression Effects 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000004880 explosion Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
Images
Classifications
-
- 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
Abstract
The present invention relates to an aluminium-casing lithium ion battery electric core with rupture membranes. When the internal pressure of the electric core abnormally rise, internal pressure is increased to make the rupture membranes on a steel rivet of a negative pole opened for decompression. The rupture membranes are positioned on a steel rivet of an aluminum cover plate; the steel rivet is provided with a flat bottom and a rod part with a hollow column shape; rupture and pressure relief holes are arranged on the flat bottom and inside the rod part with the hollow column shape; the peripheries of the rupture and pressure relief holes are connected with the rupture membranes. The aluminium-casing lithium ion battery electric core of the present invention has the advantages of compact structure, small influence on the weight of the electric core, low opening pressure and high opening pressure precision of an explosion-proof valve, good bulk production consistency and low production cost.
Description
Technical field
The present invention is relevant with lithium ion battery, particularly the aluminum hull lithium-ion electric core.
Background technology
Liquid lithium ion electricity core adopts the liquid organic electrolyte, have high energy density, high operating voltage, more and more be applied on the categories of portable electronic devices because electric core serviceability is superior, in recent years, the aluminum hull lithium-ion electric core occupies increasing market because case weight is lighter than traditional stainless steel case lithium-ion electric core in lithium ion battery market.
Lithium-ion electric core in use; in order to prevent blast on fire; when every other safeguard measure is malfunctioning; just by PTC and safety valve; and safety valve is last protection together; therefore the quality good or not of safety valve is most important to electric core safety, and especially to causing the high-capacity lithium-ion electricity core of people's life, the effect of safety valve is self-evident.
Estimate the lithium ion battery explosion-proof safety valve two important index are arranged: the one, opening pressure, the 2nd, rupture pressure disc opening pressure precision.Under the situation that physical dimension allows, it is low more that opening pressure designs, and battery is safe relatively more; Consider acceleration impact property and anti-drop, the design of rupture pressure disc opening pressure generally can not be lower than 0.3MPa, and the relatively aluminum hull lithium-ion electric core of safety design wishes that the rupture pressure disc opening pressure is in the 0.3-0.7MPa scope.The opening pressure precision reflects product quality stability, and the opening pressure precision is high more, and electric core is safe more.
Traditional aluminum hull lithium-ion electric core adopts the ordinary steel rivet use negative pole as drawing of electric core, electric in-core portion with nickel strap with the metal platen on the steel rivet with roll up the core negative pole and link to each other, do not have explosion prevention function, electric core poor stability.
The safety valve of making explosion prevention function at present on the aluminum hull lithium-ion electric core mainly contains two kinds of technical schemes: a kind of is at aluminum hull lithium-ion electric core housing or cover plate upper punch tool mark; Another kind is represented as precision rolling/vacuum cold welding aluminium foil rupture pressure disc that Japan factory is produced.
The way of punching press indentation has two shortcomings: the one, be difficult for accomplishing low-pressure, the 2nd, and the opening pressure precision is low, can not accomplish in time, break exactly, still has and catches fire, the latent defect of blast.The opening pressure precision is ± higher level of genus of 0.5MPa, and this method is confined to wearing and tearing, the distortion of drift, and drift presses down degree of depth control precision.
From the business promotion data that Japan factory provides, the aluminium rupture pressure disc opening pressure precision of aluminium explosion-proof covering board is ± 0.25MPa/cm2 that opening pressure is minimum to be 0.7MPa, uses in some producers of Japan.This product adopt vacuum fine rolling/vacuum sputtering/cold welding method produces, the equipment requirements height, investment in fixed assets is bigger, the production cost height.
For overcoming prior art limitation and weak point, special proposition the present invention.
Summary of the invention
Make the rupture pressure disc that explosion prevention function is arranged on the aluminum hull lithium-ion electric core of the present invention, rupture pressure disc is positioned on the steel rivet of Aluminum cover, steel rivet has a flat bottom and a hollow cylindrical bar part, on flat, hollow cylindrical bar inside has the explosion-proof relief hole, periphery is connected with rupture pressure disc in the explosion-proof relief hole, rupture pressure disc both directly soldering be connected steel rivet bottom, also can earlier the rupture pressure disc soldering be connected on the steel disc of a slice band explosionproof hole, then steel disc is connected with the flat Laser Welding of steel rivet.Steel rivet material selection stainless steel or nickel-plated steel, flat and the hollow cylindrical of steel rivet part both integral forming obtain, also can Combination Welding form,, adopt Laser Welding, soldering or Pressure Welding to be connected with hollow cylindrical bar part steel part then such as the steel disc of first punching press a slice band explosionproof hole.
Rupture pressure disc adopts Copper Foil or nickel foil, according to electric core specification and model, can suitably adjust explosionproof hole size, shape and thickness, the inventor is surprised to find that and adopts soldering processes to make the rupture pressure disc of battery, because high temperature discharges stress, behind the thickness deviation of controlling the raw material film, can produce the rupture pressure disc of opening pressure precision in batches for the higher level of ± 0.15MPa; Solder adopts the nickel-base alloy scolder, as the BNi-2 trade mark; Soldering processes are good with the vacuum high-temperature soldering, also can adopt the inert gas shielding soldering.Rupture pressure disc thickness is generally the 8-30 micron, and for the aluminum hull lithium-ion electric core below the 4Ah, rupture pressure disc thickness is preferably the 10-15 micron.Adopt Copper Foil to make rupture pressure disc, be exposed to electric core extraneous air one side, also should apply anti-oxidation glue at Copper Foil; To certain model electricity core, also should apply damping glue, improve the damaged performance of anti-vibration of rupture pressure disc, damping glue influences less than 0.1MPa the 0-150 ℃ of opening pressure to rupture pressure disc, such as adopting the different molecular weight polyethylene glycol allotment to form the hydrosol.
The steel rivet dual-purpose that has rupture pressure disc is done the negative pole of aluminum hull lithium-ion electric core, adopt the ambroin gasket seal between steel rivet and the Aluminum cover, the flat electric core cover plate top that both can be exposed at of steel rivet, also can design and place electric core cover plate lower space, connect for convenient, can rivet together with metal platen when steel rivet and cover plate combined riveting.
A kind of aluminum hull lithium-ion electric core with rupture pressure disc of the present invention has the following advantages:
The core strueture compactness, less to electric core weight influence; Explosion-proof valve can accomplish that opening pressure is low, and opening pressure precision height is produced high conformity in batches, and production cost is low.
Description of drawings
Accompanying drawing is a kind of generalized section of upper cover plate assembly of typical aluminum hull electricity core, and wherein 1 is the flat of steel rivet, and 2 is the sealed insulation pad, and 3 is the Aluminum cover sheet, and 4 is the sealed insulation pad, and 5 is metal platen, and 7 are negative pole connection lug.
Embodiment
Aluminum hull lithium-ion electric core to the ICP183665AR model, adopt structure shown in the accompanying drawing, at first make the stainless steel tubular rivet, on rivet flat, go out the explosionproof hole of diameter 4mm, it at limit, hole vacuum brazing thickness 12 microns calendering red copper foil 6, adopt NBi-2 amorphous state scolder, rivet bar after the soldering is placed sealed insulation pad 2 successively, Aluminum cover sheet 3, sealed insulation pad 4, metal platen 5, riveted joint then, cooperates between the good cover plate of riveted joint and the aluminum hull and closely then use laser welded seal, carry out vacuumize then, annotate electrolyte, subsequent handling such as change into, produce 183665 aluminum hull lithium-ion electric cores of band rupture pressure disc.
Claims (9)
1. aluminum hull lithium-ion electric core with rupture pressure disc, it is characterized in that having a soldering that the steel rivet of rupture pressure disc is arranged on the Aluminum cover of this aluminum hull lithium-ion electric core, adopt ambroin pad riveted joint sealing between steel rivet and the Aluminum cover, Aluminum cover adopts Laser Welding to be connected with aluminum enclosure.
2., aluminum hull lithium-ion electric core as claimed in claim 1 is characterized in that steel rivet has a flat bottom and a hollow cylindrical bar portion at least, and on flat, the hollow cylindrical interior zone has the explosion-proof relief hole, periphery is connected with rupture pressure disc in the explosion-proof relief hole.
3. aluminum hull lithium-ion electric core as claimed in claim 1 is characterized in that the direct soldering of rupture pressure disc is connected the steel rivet bottom, perhaps earlier the rupture pressure disc soldering is connected on the steel disc of a slice band explosionproof hole, is connected with the flat Laser Welding of steel rivet then.
4. aluminum hull lithium-ion electric core as claimed in claim 1 is characterized in that the flat of steel rivet and hollow cylindrical bar portion are integral formings, perhaps adopts Combination Welding to form, steel rivet material selection stainless steel or nickel-plated steel.
5. aluminum hull lithium-ion electric core as claimed in claim 3 is characterized in that rupture pressure disc is Copper Foil or nickel foil, and thickness is the 8-30 micron.
6. aluminum hull lithium-ion electric core as claimed in claim 3 is characterized in that rupture pressure disc and steel rivet soldering processes are the vacuum high-temperature soldering, perhaps inert gas shielding soldering.
7. aluminum hull lithium-ion electric core as claimed in claim 5 is characterized in that scribbling on the rupture pressure disc Copper Foil anti-oxidation glue.
8. aluminum hull lithium-ion electric core as claimed in claim 5 is characterized in that scribbling damping glue on the rupture pressure disc Copper Foil, and damping glue influences less than 0.1MPa the 40-150 ℃ of opening pressure to rupture pressure disc.
9. aluminum hull lithium-ion electric core as claimed in claim 5, the solder that it is characterized in that soldering rupture pressure disc Copper Foil is the nickel-base alloy scolder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100379245A CN100391032C (en) | 2004-05-14 | 2004-05-14 | Aluminium-casing lithium ion cell core with antiexplosion film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100379245A CN100391032C (en) | 2004-05-14 | 2004-05-14 | Aluminium-casing lithium ion cell core with antiexplosion film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1581533A CN1581533A (en) | 2005-02-16 |
| CN100391032C true CN100391032C (en) | 2008-05-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100379245A Expired - Fee Related CN100391032C (en) | 2004-05-14 | 2004-05-14 | Aluminium-casing lithium ion cell core with antiexplosion film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100391032C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800299A (en) * | 2010-04-13 | 2010-08-11 | 天津三合意电子有限公司 | Explosion-proof membrane on cover plate of power lithium ion battery electrode and welding method thereof |
| CN105161641A (en) * | 2015-09-25 | 2015-12-16 | 东莞市胜蓝电子有限公司 | Battery cover and processing method thereof |
| CN107335914B (en) * | 2017-05-19 | 2019-05-10 | 大族激光科技产业集团股份有限公司 | The welding method of power battery and its sealing nail |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11176412A (en) * | 1997-11-24 | 1999-07-02 | Samsung Display Devices Co Ltd | Cap assembly of secondary battery |
| CN1374709A (en) * | 2001-03-09 | 2002-10-16 | 李鑫 | Square lithim cell casing and its making process |
-
2004
- 2004-05-14 CN CNB2004100379245A patent/CN100391032C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11176412A (en) * | 1997-11-24 | 1999-07-02 | Samsung Display Devices Co Ltd | Cap assembly of secondary battery |
| CN1374709A (en) * | 2001-03-09 | 2002-10-16 | 李鑫 | Square lithim cell casing and its making process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1581533A (en) | 2005-02-16 |
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| C06 | Publication | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenzhen KDL Industrial Co., Ltd. Assignor: Donggao Film-Technology Co., Ltd., Beijing Contract fulfillment period: 2009.3.10 to 2015.3.10 Contract record no.: 2009440000238 Denomination of invention: Aluminium-casing lithium ion cell core with antiexplosion film Granted publication date: 20080528 License type: Exclusive license Record date: 20090408 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.3.10 TO 2015.3.10; CHANGE OF CONTRACT Name of requester: SHENZHEN CITY KEDALI INDUSTRY CO.,LTD. Effective date: 20090408 |
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Assignee: Shenzhen Kedali Industrial Co., Ltd. Assignor: Donggao Film-Technology Co., Ltd., Beijing Contract record no.: 2009440000238 Date of cancellation: 20110414 |
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| ASS | Succession or assignment of patent right |
Owner name: TIANJIN DONGGAO MEMBRANE TECH. CO., LTD. Free format text: FORMER OWNER: DONGGAO FILM-TECHNOLOGY CO., LTD., BEIJING Effective date: 20120924 |
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Effective date of registration: 20120924 Address after: 301802 No. 2, nine industrial park, 6 Economic Development Zone, Tianjin, Baodi Patentee after: Tianjin DG Membrance Tech. Co., Ltd. Address before: 101304 Beijing city Shunyi District Li Qiao Zhen Zhang Xin Shun Yi rubber factory Patentee before: Donggao Film-Technology Co., Ltd., Beijing |
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Denomination of invention: Aluminium-casing lithium ion cell core with antiexplosion film Effective date of registration: 20170426 Granted publication date: 20080528 Pledgee: Beijing Sojo Electric Co., Ltd. Pledgor: Tianjin DG Membrance Tech. Co., Ltd. Registration number: 2017120000021 |
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