CN101060168A - Rupture diaphragm manufacture method - Google Patents
Rupture diaphragm manufacture method Download PDFInfo
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- CN101060168A CN101060168A CNA2006100757182A CN200610075718A CN101060168A CN 101060168 A CN101060168 A CN 101060168A CN A2006100757182 A CNA2006100757182 A CN A2006100757182A CN 200610075718 A CN200610075718 A CN 200610075718A CN 101060168 A CN101060168 A CN 101060168A
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- blind hole
- solution
- metal base
- pressure disc
- acid
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- 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
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Abstract
The preparation method for explosion-proof film comprises: preparing blind holes on metal base, and contacting the holes with corrosion liquid to make the film thickness as 0. 015-0. 025mm. This invention is simple and little requirement on material shrinkage ratio, reduces production cost, and has wide application range, such as secondary charging cell and different safety valves.
Description
Technical field
The invention relates to a kind of preparation method of explosion-protection equipment, specifically, the invention relates to a kind of preparation method of rupture pressure disc.
Background technology
When the gas pressure in the container reaches certain value, just need come out the gas release of the inside, otherwise the increasing danger that causes container to be blasted of pressure just might occur, so, in the various closed containers that may blast, generally all be provided with safety device.When system pressure is too high, safety device just can be automatically with media discharge superfluous in the system in low-pressure system or atmosphere.Safety device comprises safety valve and explosion-protection equipment etc., and rupture pressure disc is exactly a kind of in the explosion-protection equipment.Under the very fast situation of system pressure rising speed, particularly, when blasting or be attended by the exothermic reaction of the quick-fried situation generation of indivedual shakes, safety valve often has little time effect, and the responsiveness of safety anti-explosive film is then faster than safety valve.
With the battery anti-explosion film is example, and the main effect of battery anti-explosion film has: (1) under the situation of battery operate as normal, rupture pressure disc can completely cut off the battery internal and external environment, prevents that air from entering battery and the oxidation pole piece, can prevent that electrolyte inside from spilling simultaneously; (2) under the situation of battery non-normal working, when being increased to certain pressure suddenly as inner pressure of battery, rupture pressure disc can break, and directs pressurized gas is released from explosionproof hole, thereby can effectively prevent air pressure inside from further raising and avoid battery to blast.
Secondary cell is a kind of enclosed battery, mainly comprises various alkaline batteries and lithium ion battery, and these all belong to the high battery of energy density.For the high enclosed cell of energy density, the relevant device of charger is broken down, overcharge or cause the situation of other improper use to take place, in these cases, continuation along with the inside battery chemical reaction, inside battery produces abnormal gas, causes cell internal pressure excessive, the danger that battery is had blast.Therefore, in order to prevent to cause owing to cell internal pressure is too high the generation of battery explosion, battery generally all is provided with explosion-protection equipment.
A kind of explosion-proof lithium ion battery is disclosed as CN2514496Y, the inner cover plate of this lithium ion battery comprises the metal cover board matrix that has explosionproof hole and covers the rupture pressure disc of explosionproof hole, and described rupture pressure disc is closely to be fixed on the explosionproof hole of metal cover board its sealing by method bonding or welding.
CN1374710A discloses a kind of manufacture method with lithium cell cover plate sheet of rupture pressure disc, this method comprises the aperture of going out earlier certain diameter on the cover plate sheet in advance, on aperture, cover a slice foil again, it is characterized in that the connected mode of foil and cover plate sheet is soldering.
CN1400678A discloses a kind of lithium cell cover plate and manufacture method thereof with rupture pressure disc, it is characterized in that, this explosion-proof covering board is formed by cover plate matrix and foil assembly welding, on the cover board produce the aperture of certain diameter in advance, in the hole around the ultrasonic bonding foil, before the ultrasonic bonding foil, be coated with fluid sealant at solder side in advance, carry out ultrasonic bonding after being coated with,, reach the purpose of explosion under the certain pressure by the thickness of control foil and the size and the shape of explosionproof hole.
In the said method, when the method that adopts welding is fixed on rupture pressure disc on the explosionproof hole on the battery cover board,, require the technology of welding higher, therefore operation difficulty comparatively because rupture pressure disc is too thin.Except being fixed on rupture pressure disc, the method that adopts welding can also adopt the method that at high temperature metallic film is compounded on the metal base on the explosionproof hole, when adopting this method, metallic film is easy to hardening at high temperature, make the thickness of metallic film become inhomogeneous, thereby influence the performance and the susceptibility of rupture pressure disc function.
US6150037A discloses a kind of coating metal material that is used for safety valve, and this material comprises metal base, and a plurality of perforates are arranged on this metal base, also comprises the metallic film that is laminated on this metal base, and the hole on the metal base is covered sealing.At least one surface and the surface of metallic film on the other side of the metal base in this coating metal material obtain erosional surface by dry corrosion respectively, prolong the coating metal material that obtains being used for the production safety valve laminated together by colding pressing with the erosional surface of the erosional surface of metal base and metallic film is aspectant then.In this method the shrinkage ratio of raw material matrix is had relatively high expectations, shrinkage ratio to metal forming and metallic matrix requires to be controlled between the 0.1-30%, therefore energy dissipation is big, and equipment making complexity and cost of manufacture are higher, production environment requires to carry out in dustless, sealing, vacuum environment, and also is attended by heating phenomena at cold pressure procedure.
Summary of the invention
The objective of the invention is to overcome the method complexity of existing preparation rupture pressure disc, operating difficulties, make the defective in uneven thickness of the rupture pressure disc that obtains and provide that a kind of method is simple, processing ease and make the preparation method of the uniform rupture pressure disc of rupture pressure disc thickness that obtains.
The invention provides a kind of preparation method of rupture pressure disc, wherein, this method is included in and prepares blind hole on the metal base, then etchant solution is contacted with blind hole, and it is the 0.015-0.025 millimeter that the condition of contact makes the thickness of the rupture pressure disc that obtains.
With the preparation method of other rupture pressure disc in this area relatively, the method for preparing rupture pressure disc provided by the invention is simple to operate, and the shrinkage ratio of material is not required, production cost is low.And adopt the thickness homogeneous of the rupture pressure disc that method provided by the invention prepares, can be widely used in especially can effectively being applied to make on the safety valve piece that under low pressure accurately breaks in the explosion-protection equipment and various safety-valve and housing material of secondary rechargeable battery.
Embodiment
According to the present invention, under the preferable case, it is the 0.018-0.022 millimeter that the condition of contact makes the thickness of the rupture pressure disc that obtains.
According to the present invention, described blind hole is the non through hole on the metal base, the method that the preparation of described blind hole can adopt those skilled in the art to know altogether is prepared, and processes on metal base as adopting milling machine or punch press, obtains blind hole to remove most of metal base.
Described metal base can be the various metal materials that can be used to prepare rupture pressure disc, as aluminium sheet, steel plate, corrosion resistant plate etc., the coat of metal can also be contained in the surface of described metal base, and described coated metal can be one or more in nickel, copper, aluminium, lead, chromium, the silver etc.The described method that coated metal is plated on the metal base is that those skilled in the art are in common knowledge, as adopting chemical plating or electric plating method coated metal is plated on the one or both sides of metal base.Described thickness of coating is the 0.015-0.025 millimeter, is preferably the 0.018-0.022 millimeter.As, the metal base that the coat of metal is contained on described surface can be nickel plating aluminium sheet, zinc-plated aluminium sheet, silver-plated steel plate, copper facing zine plate etc.The present invention is not particularly limited the thickness of described metal base, and according to the cover plate intensity decision of made, generally speaking, the thickness of described metal base is the 0.8-3.0 millimeter.Shape and size to blind hole are not particularly limited, described blind hole can have any shape, as circular, square or waist shape, generally speaking, be preferably mounting hole or circular port, described waist shape is that a centre is square, and square opposite side two ends are the shape of arc, length between the summit of described two arcs is preferably the 3.0-6.0 millimeter, and the chord length of arc is preferably the 2.5-5.0 millimeter.Described circular blind hole is preferably the circular port that diameter is the 2.0-5.0 millimeter.Pitch of holes also is not particularly limited, and the pitch of holes of described blind hole is by the physical dimension and the machine-finish allowance decision thereof of cover plate manufacturing process cover plate.
According to the present invention, when the coat of metal was contained on the surface of metal base, described coating can be on the one side or two sides of metal base.When metal base contains coating for one side, at the metallic substrate surface processing blind hole of no coating one side.If coating is all contained on the two sides of metal base, then can select any processing blind hole of metal base, after processing on the described metal base obtains blind hole, just the most of metal base on the blind hole is removed and obtained the metal base of thinner thickness, with etchant solution blind hole is corroded then and obtain the rupture pressure disc of desired thickness.In the process of corrosion, because the chemical activity of coated metal is than substrate metal difference, therefore, etchant solution can dissolve substrate metal, and do not react with coated metal, thereby the thickness of the rupture pressure disc that obtains is the thickness of coated metal, that is, the thickness that makes the rupture pressure disc that obtains is the 0.015-0.025 millimeter.
Described etchant solution is acid solution or alkaline solution.Described acid solution is preferably one or more in the aqueous solution of hydrochloric acid, acetic acid, phosphoric acid, carbonic acid, sulfuric acid; Described alkaline solution is preferably one or more in the aqueous solution such as NaOH, potassium hydroxide, sodium acid carbonate, sodium acetate, sodium carbonate, calcium hydroxide.
The pH value of described acid solution is 2-6.5, and the pH value of described alkaline solution is 7.5-13.
More preferably under the situation, described acid solution or alkaline solution are the weak acid or the weakly alkaline aqueous solution, because the more approaching neutrality of pH value of weak acid or weak alkaline aqueous solution, therefore, easier pH value control corrosion rate by the control etchant solution, the pH value of solution is more little, and corrosion rate is slow more, thereby make the surface of rupture pressure disc more smooth, thickness is more even.The pH value of described preferred acid solution is 5-6.5, and the pH value of preferred alkaline solution is 7.5-9.Under the preferable case, the volume of described etchant solution is 40-60 a times of metal base volume.
Selecting suitable etchant solution for use for the chemical property of different metal base material, is aluminium as base material, then selects alkaline corrosion liquid for use; If matrix is a steel, then select acid etching solution for use.
According to the present invention, the method that described etchant solution is contacted with blind hole comprises and etchant solution is contacted with the metal base that contains the region between the heart and the diaphragm hole or etchant solution is directly contacted with blind hole.If after the metal base that contains blind hole being carried out general corrosion with etchant solution, described rupture pressure disc can not reach thickness requirement in addition, contact method of the present invention also comprise earlier with etchant solution with contact with the excessive blind hole of thickness again after the metal base that contains blind hole contacts, corrode again.
The time that described etchant solution contacts with blind hole can decide according to the concentration of etchant solution and the thickness of the required rupture pressure disc that obtains.For the metal base that does not contain coating, decide according to the thickness of the required rupture pressure disc that obtains and the concentration of etchant solution the time of contact of described etchant solution and blind hole, was generally 10 minutes-2 hours.For the metal base that contains coating, because the metal activity of coated metal is poorer than the metal activity of metal base far away, therefore coated metal substantially or fully not with acid or alkaline etchant solution reaction, therefore be not particularly limited the time of contact for metal base that contains coating and etchant solution, as long as satisfy the thickness that makes the rupture pressure disc that finally obtains is coated metal between the 0.015-0.025 millimeter thickness.
To do to describe further to the present invention by embodiment below.
Embodiment 1
This embodiment illustrates the preparation of rupture pressure disc provided by the invention.
(1) will be of a size of 50 millimeters * 30 millimeters * 1.2 millimeters aluminium sheet, processing blind hole on punch press, the blind hole bottom thickness of the metal base after obtaining processing is 0.22 millimeter, and the pitch of holes of blind hole is 10 millimeters, and blind hole is that 5 millimeters diameter is 15 circular blind holes of 4.8 millimeters apart from the aluminium sheet edge.
(2) the above-mentioned aluminium sheet that is processed with blind hole being immersed in 10 liters of pH values is in 8 the sodium hydrate aqueous solution, aluminium sheet to be carried out general corrosion, corrodes to obtain rupture pressure disc after 1 hour.The thickness of described rupture pressure disc is the 0.018-0.026 millimeter, and measures with amesdial, the thickness of resulting rupture pressure disc is screened, by two margins of tolerance 0.02
-0.002 + 0.002Mm, 0.02
+ 0.002 + 0.006Mm classifies to rupture pressure disc, is that the margin of tolerance is 0.02 for the blocked up rupture pressure disc of thickness
+ 0.002 + 0.006The rupture pressure disc of mm continues to drip above-mentioned sodium hydroxide solution in blind hole, and it is the 0.018-0.022 millimeter that the amount of dropping and reaction time make the thickness of the rupture pressure disc that obtains at last.The blind hole diameter that obtains at last is 5 millimeters.
Embodiment 2
This embodiment illustrates the preparation of rupture pressure disc provided by the invention.
Method according to embodiment 1 prepares rupture pressure disc, obtains thickness behind the rupture pressure disc of 0.018-0.026 millimeter aluminium sheet being carried out general corrosion, measures with general amesdial, the thickness of resulting rupture pressure disc is screened, by two margins of tolerance 0.02
-0.002 + 0.002Mm and 0.02
+ 0.002 + 0.006Mm classifies to rupture pressure disc, and different is that the rupture pressure disc that thickness is blocked up is that the margin of tolerance is 0.02 earlier
+ 0.002 + 0.006The rupture pressure disc of mm is processed into battery cover board, is 0.02 with rupture pressure disc thickness then
+ 0.002 + 0.006The cover plate of mm is immersed in the sodium hydrate aqueous solution identical with embodiment 1, corrodes, and the thickness of the rupture pressure disc that the time chien shih of corrosion obtains at last is the 0.018-0.022 millimeter.The blind hole diameter that obtains at last is 5 millimeters, and cover sheet thickness is 1 millimeter.
Embodiment 3
This embodiment illustrates the preparation of rupture pressure disc provided by the invention.
(1) will be of a size of 50 millimeters * 30 millimeters * 1.2 millimeters, thickness of coating is the silver-plated steel plate of 0.018 millimeter individual layer with milling machine processing blind hole on the one side that does not have coating of silver-plated steel plate, the blind hole bottom thickness of the metal base after obtaining processing is 0.22 millimeter, the pitch of holes of blind hole is 10 millimeters, and pitch-row is 15 circular blind holes of 4.6 millimeters from the diameter of 5 millimeters of ag-plated steel panel edges.
(2) the above-mentioned silver-plated steel plate that is processed with blind hole being immersed in 10 liters of pH values is in 5 the aqueous hydrochloric acid solution, silver-plated steel plate to be carried out general corrosion, and the time of corrosion makes and obtains rupture pressure disc thickness is 0.018 millimeter.Be corroded owing to the ferro element in the steel can be dissolved in aqueous hydrochloric acid solution, and silver not with hydrochloric acid generation chemical reaction, the thickness of the rupture pressure disc that therefore obtains is the thickness of the coat of metal.The length of etching time only makes the diameter of blind hole increase to some extent to the not special influence of the thickness of rupture pressure disc, and the diameter of the blind hole that obtains at last is 5 millimeters.
Embodiment 4
This embodiment illustrates the preparation of rupture pressure disc provided by the invention.
(1) is being of a size of 50 millimeters * 30 millimeters * 1.0 millimeters, every thickness of coating is aluminium sheet milling machine processing blind hole on any one side of nickel plating aluminium sheet of 0.022 millimeter two-sided chemical plating metal nickel, the blind hole bottom thickness of the metal base after obtaining processing is 0.24 millimeter, the pitch of holes of blind hole is 10 millimeters, and pitch-row is 15 circular blind holes of 4.6 millimeters from the diameter of 5 millimeters of nickel-plated aluminum panel edges.
(2) the above-mentioned nickel plating aluminium sheet that is processed with blind hole being immersed in 10 liters of pH values is in 8 the sodium hydrate aqueous solution nickel plating aluminium sheet to be carried out general corrosion, and it is 0.022 millimeter that etching time makes the thickness of the rupture pressure disc that finally obtains.The thickness of described rupture pressure disc is the thickness that is coat of metal nickel.The blind hole diameter that obtains at last is 5 millimeters.
Claims (11)
1, a kind of preparation method of rupture pressure disc, wherein, this method is included in and prepares blind hole on the metal base, then etchant solution is contacted with blind hole, and it is the 0.015-0.025 millimeter that the condition of contact makes the thickness of the rupture pressure disc that obtains.
2, method according to claim 1, wherein, it is the 0.018-0.022 millimeter that the condition of contact makes the thickness of the rupture pressure disc that obtains.
3, method according to claim 1, wherein, described metal base contains or does not contain coating.
4, method according to claim 3, wherein, the coating of the described metal base that contains coating for not with the metal of etchant solution reaction, described coated metal is selected from one or more in nickel, copper, aluminium, lead, chromium, the silver.
5, method according to claim 3, wherein, described metal base is selected from a kind of in aluminium sheet, steel plate, corrosion resistant plate, nickel plating aluminium sheet, chromium plating aluminium sheet, zinc-plated aluminium sheet, the galvanized steel plain sheet.
6, method according to claim 4, wherein, the thickness of coating of described metal base is the 0.015-0.025 millimeter.
7, method according to claim 1, wherein, described blind hole is circular port or mounting hole.
8, method according to claim 1, wherein, described etchant solution is acid solution or alkaline solution, and the pH value of described acid solution is 2-6.5, and the pH value of described alkaline solution is 7.5-13.
9, method according to claim 8, wherein, the pH value of described acid solution is 5-6.5, the pH value of described alkaline solution is 7.5-9.
10, according to Claim 8 or 9 described methods, wherein, described acid solution is selected from one or more in the aqueous solution of hydrochloric acid, acetic acid, phosphoric acid, carbonic acid, sulfuric acid; Described alkaline solution is selected from one or more in the aqueous solution of NaOH, potassium hydroxide, sodium acid carbonate, sodium acetate, sodium carbonate, calcium hydroxide.
11, method according to claim 1, wherein, the method that described etchant solution contacts with blind hole is for to contact etchant solution with the metal base that contains blind hole, perhaps etchant solution is directly contacted with blind hole, perhaps earlier with etchant solution with contact with blind hole again after the metal base that contains blind hole contacts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100757182A CN100517806C (en) | 2006-04-18 | 2006-04-18 | Rupture diaphragm manufacture method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100757182A CN100517806C (en) | 2006-04-18 | 2006-04-18 | Rupture diaphragm manufacture method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101060168A true CN101060168A (en) | 2007-10-24 |
| CN100517806C CN100517806C (en) | 2009-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100757182A Expired - Fee Related CN100517806C (en) | 2006-04-18 | 2006-04-18 | Rupture diaphragm manufacture method |
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| CN (1) | CN100517806C (en) |
Cited By (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 |
| CN102637841A (en) * | 2012-04-10 | 2012-08-15 | 深圳邦凯新能源股份有限公司 | Production method of anti-explosion valve sheet, lithium ion battery and anti-explosion cover plate of lithium ion battery |
-
2006
- 2006-04-18 CN CNB2006100757182A patent/CN100517806C/en not_active Expired - Fee Related
Cited By (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 |
| CN102637841A (en) * | 2012-04-10 | 2012-08-15 | 深圳邦凯新能源股份有限公司 | Production method of anti-explosion valve sheet, lithium ion battery and anti-explosion cover plate of lithium ion battery |
| CN102637841B (en) * | 2012-04-10 | 2014-07-23 | 深圳邦凯新能源股份有限公司 | Production method of anti-explosion valve sheet, lithium ion battery and anti-explosion cover plate of lithium ion battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100517806C (en) | 2009-07-22 |
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