CN1231982C - Lithium cell cover plate with explosion-proof membrane and its making process - Google Patents
Lithium cell cover plate with explosion-proof membrane and its making process Download PDFInfo
- Publication number
- CN1231982C CN1231982C CNB011091363A CN01109136A CN1231982C CN 1231982 C CN1231982 C CN 1231982C CN B011091363 A CNB011091363 A CN B011091363A CN 01109136 A CN01109136 A CN 01109136A CN 1231982 C CN1231982 C CN 1231982C
- Authority
- CN
- China
- Prior art keywords
- foil
- cover plate
- temperature
- solder
- aperture
- 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
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 10
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000012528 membrane Substances 0.000 title abstract 2
- 239000011888 foil Substances 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 229910000679 solder Inorganic materials 0.000 claims description 13
- 238000005476 soldering Methods 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 238000005219 brazing Methods 0.000 claims description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 3
- 239000002390 adhesive tape Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- 238000004880 explosion Methods 0.000 abstract description 3
- 238000012769 bulk production Methods 0.000 abstract 1
- 238000001459 lithography Methods 0.000 abstract 1
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- 238000007373 indentation Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000000608 laser ablation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
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
Landscapes
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The present invention discloses a cover plate hunk of an electric core of a lithium battery with rupture membranes and a manufacturing method of the hunk. Compared with the common cover plate with notches, small holes with certain diameters are punched on the hunk in advance, foil material is brazed on the holes, and the thickness of the foil material is controlled to achieve the purpose of explosion under certain pressure; for slightly thick foil material, laser lithography processing can be carried out to the brazed foil material. The method of the present invention has the advantages that because the consistency of the thickness of the foil material is good, bulk production cover plates are easy to guarantee the consistency of performance, and the use reliability of the electric core is high.
Description
Technical field
The present invention is relevant with lithium battery.
Background technology
Lithium battery is that the core of lithium battery then is electric core for communication products such as mobile phone provide the energy requisite important accessory, and electric core is made up of housing, cover plate, electrode, electrolyte etc.
Lithium battery electric core generally adopts square structure at present, and housing generally is flat, and upper opening adopts laser welded seal with cover plate in the future, and the electric core shell body of producing generally adopts the housing of stretch forming at present, and therefore explosion-proof indentation is on the cover board made.Usually adopt Sheet Metal Forming Technology on the cover plate sheet, to go out the indentation of certain depth, in the hope of reaching the purpose of explosion under the certain pressure, but in fact since the precision of punch press be difficult to guarantee, add the wearing and tearing of upper punch, the degree of depth of indentation is difficult to hold consistency, does not have explosion-proof purpose.
Summary of the invention
For overcoming the limitation of prior art, special proposition the present invention.
The invention discloses a kind of manufacture method with lithium cell cover plate sheet of rupture pressure disc, this cover plate is compared with the cover plate that has indentation usually, on sheet, go out the aperture of certain diameter in advance, on the hole, cover a slice foil, foil thickness 0.01-0.15mm, after foil and base plate clean up, adopt capacitor spot welding machine that foil is located along the spot welding of aperture periphery, place the adhesive tape solder at the foil edge.Solder also can be coated in the commissure with the form of slip with adhesive, solvent together.Dry fed to boiler soldering; soldering can be carried out in the vacuum high-temperature soldering oven; also can under argon shield, carry out high temperature brazing; solder alloy flows after reaching its liquidus temperature; joint filling under the capillary force effect, after the cooling of insulation certain hour, the commissure solder solidifies; promptly obtain welded electric core cover plate sheet after being chilled to low temperature and coming out of the stove, foil can be nickel foil, stainless steel foil, aluminium alloy foil material or nickel-base alloy paper tinsel etc.For stainless steel cover plate sheet, solder adopts nickel-base alloy, as BNi-2, and normal solder such as BNi-5, foil is good with the thick nickel foil of 0.03mm.For aluminium alloy cover plate sheet, solder adopts Al-alloy based solder, and foil adopts aluminium alloy foil material, and thickness is good with 0.02mm.To being welded with the housing of rupture pressure disc, for reaching the purpose of explosion under the certain pressure, can carry out laser ablation to the housing foil of postwelding and handle, for the thick foil of 0.03mm, width of nick is controlled at 0.01-0.015mm and gets final product.
Adopting method of the present invention to make the lithium cell cover plate sheet has the following advantages: because the foil consistency of thickness is good, the cover plate of batch process is easy to the consistency of guaranteed performance, and the dependability of electric core is higher.
Embodiment
Embodiment: for manufacturing dimension as follows: long 34mm, the stainless steel electricity core cover plate sheet of wide 7.9mm, can be by following method manufacturing, at first when punching press is large stretch of, go out the aperture of diameter 3.5mm on the sheet, with diameter 6mm, the foil of thick 0.02mm covers on the aperture, at the periphery in hole stainless steel base plate that foil and 0.5mm is thick with condenser type spot welder spot welding location, little of the adhesive tape that adopts the BNi-2 solder powder to make then, be bonded at nearly commissure with optical resin gum, dry stand-by: cover plate is in batch put into the vacuum high-temperature soldering oven carry out soldering, brazing temperature 1030-1060 ℃, be incubated 5-15 minute, with the stove cooling, promptly get the electric core cover plate sheet that has rupture pressure disc after room temperature is come out of the stove then.
Claims (1)
1, a kind of manufacture method with lithium cell cover plate sheet of rupture pressure disc, on the cover plate sheet, go out earlier the aperture of certain diameter in advance, on aperture, cover a slice foil again, the connected mode that it is characterized in that foil and cover plate sheet is soldering, method for welding is: after foil and base plate clean up, on aperture, cover a slice foil, adopt capacitor spot welding machine that foil is located along the spot welding of aperture periphery, place adhesive tape solder or solder and adhesive at the foil edge, solvent is coated in the commissure with the form of slip together, dry fed to boiler soldering, high temperature brazing is carried out or is carried out in soldering under argon shield in the vacuum high-temperature soldering oven, solder alloy flows and joint filling under the capillary force effect after reaching its liquidus temperature, lower the temperature with stove after 5-15 minute in insulation, be chilled to room temperature and come out of the stove, hole diameter is 3.5mm; The large stretch of material of cover plate is a stainless steel, and foil is that thickness is that 0.01-0.03mm, diameter are the nickel foil of 6mm, and solder is BNi-2 or BNi-5, and brazing temperature is 1030-1060 ℃; For the thick foil of 0.03mm, width of nick is controlled at 0.01-0.015mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011091363A CN1231982C (en) | 2001-03-09 | 2001-03-09 | Lithium cell cover plate with explosion-proof membrane and its making process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011091363A CN1231982C (en) | 2001-03-09 | 2001-03-09 | Lithium cell cover plate with explosion-proof membrane and its making process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1374710A CN1374710A (en) | 2002-10-16 |
| CN1231982C true CN1231982C (en) | 2005-12-14 |
Family
ID=4657743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011091363A Expired - Fee Related CN1231982C (en) | 2001-03-09 | 2001-03-09 | Lithium cell cover plate with explosion-proof membrane and its making process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1231982C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101807674A (en) * | 2010-04-13 | 2010-08-18 | 天津三合意电子有限公司 | Lithium ion power battery cap and welding method thereof |
Families Citing this family (2)
| 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 |
| CN205764438U (en) * | 2015-02-09 | 2016-12-07 | 司浦爱激光技术英国有限公司 | Laser welded seam and the article including laser welded seam |
-
2001
- 2001-03-09 CN CNB011091363A patent/CN1231982C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101807674A (en) * | 2010-04-13 | 2010-08-18 | 天津三合意电子有限公司 | Lithium ion power battery cap and welding method thereof |
| CN101807674B (en) * | 2010-04-13 | 2012-07-04 | 天津三合意电子有限公司 | Lithium ion power battery cap and welding method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1374710A (en) | 2002-10-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING DONGGAO MEMBRANE TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: LI XIN Effective date: 20031203 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20031203 Address after: 101304, Beijing, Shunyi District, Li Qiao, Xin Zhuang, North First Street, No. 53 Applicant after: Donggao Film-Technology Co., Ltd., Beijing Address before: 101304, Beijing, Shunyi District, Li Qiao, Xin Zhuang, North First Street, No. 53 Applicant before: Li Xin |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 101304 SHUNYI, BEIJING TO: 301802 BAODI, TIANJIN |
|
| TR01 | Transfer of patent right |
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, Shunyi District, Li Qiao, Xin Zhuang, North First Street, No. 53 Patentee before: Donggao Film-Technology Co., Ltd., Beijing |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Lithium cell cover plate with explosion-proof membrane and its making process Effective date of registration: 20170426 Granted publication date: 20051214 Pledgee: Beijing Sojo Electric Co., Ltd. Pledgor: Tianjin DG Membrance Tech. Co., Ltd. Registration number: 2017120000021 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051214 Termination date: 20200309 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20220613 Granted publication date: 20051214 Pledgee: BEIJING SOJO ELECTRIC Co.,Ltd. Pledgor: TIANJIN DG MEMBRANE Co.,Ltd. Registration number: 2017120000021 |