CN110137411A - Explosion rupture disk and its preparation method and application for lithium battery cap - Google Patents
Explosion rupture disk and its preparation method and application for lithium battery cap Download PDFInfo
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- CN110137411A CN110137411A CN201910271272.8A CN201910271272A CN110137411A CN 110137411 A CN110137411 A CN 110137411A CN 201910271272 A CN201910271272 A CN 201910271272A CN 110137411 A CN110137411 A CN 110137411A
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- rupture disk
- explosion rupture
- lithium battery
- battery cap
- alloy
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C12/00—Alloys based on antimony or bismuth
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/04—Alloys containing less than 50% by weight of each constituent containing tin or lead
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- 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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
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- 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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/375—Vent means sensitive to or responsive to temperature
-
- 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 provides a kind of explosion rupture disk for lithium battery cap, the alloy material of the explosion rupture disk for lithium battery cap include tin, lead, bismuth, cadmium, indium at least two；The fusing point of the explosion rupture disk is 100-116 DEG C.Since tin, lead, bismuth, cadmium, the fusing point of indium are lower in nature, fusion is carried out using above-mentioned metal and prepares alloy, the fusing point for guaranteeing the explosion rupture disk alloy being prepared is 100-116 DEG C, when using 100-116 DEG C of fusing point of low-melting alloy, when thermal runaway occurs for battery, when battery temperature is higher than 100 DEG C, alloy can start dissolved state occur, the fracture of its metallic bond of Microscopic, its alloy strength of macro manifestations reduces, and thereby reduces the cracking pressure of explosion rupture disk, the nut cap of the invention can reduce cracking pressure threshold value, lose heart in advance, guarantees cell safety.
Description
Technical field
The present invention relates to field of lithium more particularly to a kind of explosion rupture disk and preparation method thereof for lithium battery cap,
A kind of lithium battery cap and a kind of lithium battery.
Background technique
Lithium ion battery is in daily use, because of improper use, it may appear that short circuit, overcharge, and the fortuitous events such as water inlet,
When protection board loses protective effect, it is possible to create battery explosion situation on fire.Specifically, when lithium ion battery trouble free service,
For internal temperature less than 95 degrees Celsius, the diaphragm fusing point that isolation positive and negative anodes are played in inside is 130-160 degrees Celsius.It is lost when heat occurs for battery
When control, temperature can continue to rise, and when usual internal temperature rises to 150 degrees Celsius, battery may explode.
Lithium ion cylinder battery explodes in order to prevent, is provided in the capping structure of lithium ion cylinder battery explosion-proof
Piece, the capping structure after explosion rupture disk is arranged are as shown in Figure 1.The nut cap of lithium battery is by top cap, PTC, explosion rupture disk, welding aluminium flake group
At sub-assembly.Welding aluminium flake is connect with explosion rupture disk spot welding, is welded to connect turning circuit with anode.Explosion rupture disk is hemisphere face
Metal film has pressure release indentation above, there is two big functions, first is that when battery exception thermal runaway or voltage are more than stop voltage
When, cell internal pressure will increase, after internal pressure increases to certain value, after the hemisphere face stress of the inside concave curved of explosion rupture disk
Become to outwardly protrude, make explosion rupture disk and weld the pad drawing crack disconnection of aluminium flake, cuts off circuital current, battery is opened with external world's formation
Battery security is protected on road；Second is that inner pressure of battery continues to increase, when being more than the stress limit above explosion rupture disk at indentation,
Explosion rupture disk is ruptured along indentation, and cell internal pressure is released from rent, protects battery security.However, when short circuit, mistake occur for battery
When the abnormal conditions such as charging, it will lead to inside and be abnormal thermal runaway, inside battery generates bulk gas because chemically reacting at this time,
Air pressure increases, and battery cap explosion rupture disk opens pressure release, but the unlatching of explosion rupture disk lag and discouraged speed are slow, lead to such heat
Battery out of control is easy to happen explosion.And harm caused by lithium battery explosion is huge.Battery explosion is prevented in industry at present
Nut cap unlatching it is only related with the design pressure that it is opened, it is unrelated with the anomalous variation of internal heat of battery.
Summary of the invention
The explosion rupture disk and preparation method thereof that the purpose of the present invention is to provide a kind of for lithium battery cap, it is intended to solve existing
Have in technology lithium battery explosion rupture disk fusing point is excessively high nut cap is caused to be opened slowly, using unsafe problem.
Another object of the present invention is to provide a kind of lithium battery cap and lithium battery containing above-mentioned explosion rupture disk.
For achieving the above object, The technical solution adopted by the invention is as follows:
The alloy material of a kind of explosion rupture disk for lithium battery cap, the explosion rupture disk for lithium battery cap includes
Tin, lead, bismuth, cadmium, indium at least two；
The fusing point of the explosion rupture disk is 100-116 DEG C.
Correspondingly, providing a kind of preparation method of explosion rupture disk for lithium battery cap, comprising the following steps:
Each alloy raw material component is weighed according to the element proportion of the above-mentioned explosion rupture disk for lithium battery cap；
The first high alloy raw material of fusing fusing point, then the sequence according to fusing point from high to low, successively adds low-melting conjunction
Golden raw material carries out melting and obtains mixed molten liquid, while carrying out degasification and slagging-off to the mixed molten liquid；
The mixed solution of the degasification and slagging-off is subjected to roughing into blank, rerolls and slab is made；
By the slab rolling at woollen, the woollen is rolled into low-melting alloy with four-roller irreversible foil mill group,
As it is used for the explosion rupture disk of lithium battery cap.And it is a kind of for lithium battery cap, the lithium battery cap that is used for is above-mentioned
Explosion rupture disk for lithium battery cap.
And a kind of lithium battery cap, the lithium battery cap include the explosion rupture disk of above-mentioned lithium battery cap.
And a kind of lithium battery, the lithium battery include above-mentioned lithium battery cap.
Compared with prior art, a kind of alloy material for the explosion rupture disk of the lithium battery cap explosion rupture disk of the present invention
Material comprising tin, lead, bismuth, cadmium, indium at least two；And the fusing point of the explosion rupture disk is 100-116 DEG C.Due to tin, lead, bismuth, cadmium,
The fusing point of indium is lower, specifically, 232 DEG C of the fusing point of tin, 327 DEG C of the fusing point of lead, 271.3 DEG C of the fusing point of bismuth, the fusing point 321 of cadmium
DEG C, 156.4 DEG C of the fusing point of indium, the fusing point of above-mentioned each metal is respectively less than the fusing point of aluminium, and (and explosion rupture disk is using metallic aluminium at present, metal
The fusing point of aluminium is 660 DEG C), fusion is carried out using above-mentioned metal and prepares alloy, guarantees the fusing point of explosion rupture disk alloy being prepared
It is 100-116 DEG C.Explosion rupture disk of the present invention using 100-116 DEG C of fusing point of low-melting alloy as lithium battery cap, when lithium electricity
When thermal runaway occurs for pond, as long as lithium battery temperature is higher than 100 DEG C -116 DEG C, the alloy material of explosion rupture disk will start to melt, gold
Belong to key to be broken, explosion rupture disk alloy material strength reduction, to reduce the cracking pressure of explosion rupture disk, i.e. nut cap cracking pressure threshold
Value reduces, and then realizes and lose heart in advance, guarantees the security performance of battery.
The preparation method of explosion rupture disk provided in an embodiment of the present invention for lithium battery cap, method is simple, and it is convenient to operate,
Be conducive to preparation of industrialization use.
A kind of lithium battery cap provided in an embodiment of the present invention, since the nut cap includes above-mentioned for lithium battery cap
Explosion rupture disk, then the lithium battery cap in use, can to avoid due to fusing point it is excessively high caused by nut cap unlatching slowly lead
Cause to improve the safety that lithium battery uses with unsafe problem.
A kind of lithium battery provided in an embodiment of the present invention, the lithium battery include above-mentioned lithium battery cap, then lithium electricity
In the use process of pond, security performance is improved.
Detailed description of the invention
Fig. 1 is the cylindrical battery cap structure provided.
Specific embodiment
To keep the purpose, technical solution and technical effect of the embodiment of the present invention clearer, the present invention will be implemented below
Technical solution in example is clearly and completely described, it is clear that and described embodiments are some of the embodiments of the present invention, and
The embodiment being not all of.In conjunction with the embodiment in the present invention, those of ordinary skill in the art are not making creative work
Under the premise of every other embodiment obtained, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that, term " first ", " second " are used for description purposes only, and cannot
It is interpreted as indication or suggestion relative importance or implicitly indicates the quantity of indicated technical characteristic.Define as a result, " the
One ", the feature of " second " can explicitly or implicitly include one or more of the features.In the description of the present invention,
The meaning of " plurality " is two or more, unless otherwise specifically defined.
Present example provides a kind of explosion rupture disk for lithium battery cap, the explosion rupture disk for lithium battery cap
Alloy material include tin, lead, bismuth, cadmium, indium at least two；
The fusing point of the explosion rupture disk is 100-116 DEG C.
Specifically, the alloy material of the explosion rupture disk of lithium battery cap prepared by the embodiment of the present invention include tin, lead, bismuth,
At least two of cadmium, indium, meanwhile, the fusing point of the explosion rupture disk is 100-116 DEG C, due to tin in nature, lead, bismuth, cadmium, indium
Fusing point is lower, respectively 232 DEG C of the fusing point of tin, 327 DEG C of the fusing point of lead, 271.3 DEG C of the fusing point of bismuth, 321 DEG C of the fusing point of cadmium, indium
156.4 DEG C of fusing point, the preparation of alloy is carried out by adjusting the ratio of a material, it can be ensured that the fusing point of explosion rupture disk is 100-116
℃.In lithium battery normal use process, the temperature of dye inside is lower than 100 DEG C, is closed using 100-116 DEG C of fusing point of low melting point
Material of the gold as explosion rupture disk, when thermal runaway occurs for battery, when battery temperature is higher than 100 DEG C, alloy can start to dissolve
State, when alloy dissolves, surface strength will be reduced, and thereby reduce the nut cap meeting of cracking pressure the invention of explosion rupture disk
Cracking pressure threshold value is reduced, is lost heart in advance, can guarantee battery use process safety.
Lithium battery electrolytes pyrolysis is EMC decomposition generation DEC and DMC, and DEC and DMC and LiPF6Decomposition produce
Object PF5Sequence of chemical reaction occurs, a large amount of reaction heat and gas are discharged, due to flammable electrolyte and Li0.5CoO2Thermal decomposition
Product O2Between combustion reaction occurs, make Li0.5CoO2Occur complicated pyrolysis, and with the raising of reaction temperature,
Reaction rate is more and more violent.If the material melting point temperature being prepared be lower than 100 DEG C, when battery normal use internal material into
When row normal reaction, explosion rupture disk has already appeared fusing, and battery is caused to lose heart in advance, will affect the normal use of battery in this way.When
When the reaction temperature of material is more than 116 DEG C in battery, reaction rate is significantly improved, and with the raising of reaction temperature, reaction
Rate is accelerated, if the alloy material temperature of preparation is higher than 116 DEG C, since inside battery electrolyte pyrolysis is with temperature liter
High-speed is accelerated, if the melting temperature of alloy material is higher than 116 DEG C, can have little time to let out in advance before inside battery explodes
The cracking pressure of explosion rupture disk is reduced before air lift, therefore, if the melting temperature of alloy material is higher than 116 DEG C, cannot be guaranteed well
The safety of battery use process.
It preferably, include following weight hundred with the alloy total weight of the explosion rupture disk for lithium battery cap for 100%
Divide the following component of ratio: 20%~28% tin；0%~30% lead；45%~65% bismuth；0%~21% cadmium；0%~1.5%
Indium.When the adding proportion of alloy meets the above percentage, it is ensured that the alloy material fusing point being prepared meets 100-116
DEG C, obtained lithium battery has good anti-explosion safety performance when coping with inner heat appearance exception.
In a preferred embodiment of the invention, based on by described by the alloy gross weight of the explosion rupture disk of lithium battery cap for 100%,
Following component comprising following weight percent: 20%~24% tin；25%~30% lead；45%~55% bismuth；0%~
1.5% cadmium；0%~1.5% indium.When the adding proportion of alloy meets the above percentage, it is ensured that the alloy material being prepared
Expect that melting temperature is 100 DEG C, obtained lithium battery has good explosion-proof security when coping with inner heat appearance exception
Energy.Specifically, when the explosion rupture disk alloy material melting temperature being prepared according to above-mentioned element proportion is 100 DEG C, when in battery
When the reaction temperature in portion is lower than 100 DEG C, the cracking pressure of this explosion rupture disk is 2.0MPa；When inside battery reaction temperature be 100~
At 120 DEG C, and when the reaction time is in 1-10 minutes, the cracking pressure of explosion rupture disk drops to 1.2MPa, and cracking pressure is than initial
Cracking pressure has dropped 40%；When inside battery reaction temperature is increased to 120-130 DEG C, internal cracking pressure drops to
0.2MPa makes explosion rupture disk in the case where exception occurs in inside battery, can reduce cracking pressure at any time, and protection battery uses
Safety.
In a preferred embodiment of the invention, with the alloy gross weight of the explosion rupture disk for lithium battery cap for 100%, packet
Following component containing following weight percent: 22%~26% tin；0%~1.5% lead；50%~55% bismuth；18%~21%
Cadmium；0%~1.5% indium.When the adding proportion of alloy meets the above percentage, it is ensured that the alloy material fusing point being prepared
Temperature is 103 DEG C, can satisfy the use of battery.Specifically, the explosion rupture disk alloy material that this preferred embodiment is prepared
Fusing point is 103 DEG C, and when inside battery reaction temperature is lower than 100 DEG C, internal cracking pressure is 2.0MPa；When reaction temperature reaches
When to 100-120 DEG C, the cracking pressure of explosion rupture disk has dropped 35% than initial pressure, i.e., when cracking pressure reaches 1.3MPa,
Explosion rupture disk can be opened；When reaction temperature rises to 120-130 DEG C, cracking pressure drops to 0.3MPa, has dropped 85%, in fact
Show and lost heart in advance, has guaranteed the security performance of battery.
In a preferred embodiment of the invention, with the alloy gross weight of the explosion rupture disk for lithium battery cap for 100%, packet
Following component containing following weight percent: 24%~28% tin；10%~20% lead；55%~65% bismuth；0%~1.5%
Cadmium；0%~1.5% indium.When the adding proportion of alloy meets the above percentage, it is ensured that the alloy material fusing point being prepared
Temperature is 116 DEG C, can satisfy the use of battery.Specifically, the alloy material melting temperature that this preferred embodiment is prepared
It is 116 DEG C, initial cracking pressure is 2.0MPa before cell reaction, when it is 100-120 DEG C that temperature, which increases, the unlatching of explosion rupture disk
Pressure ratio initial pressure has dropped 30%, i.e., when cracking pressure reaches 1.4MPa, can open explosion rupture disk；When in reaction temperature
When rising to 120-130 DEG C, cracking pressure drops to 1.2MPa, has dropped 40%, realizes and loses heart in advance, guarantees the safety of battery
Performance.
Compared with prior art, a kind of alloy material for the explosion rupture disk of the lithium battery cap explosion rupture disk of the present invention
Material comprising tin, lead, bismuth, cadmium, indium at least two；And the fusing point of the explosion rupture disk is 100-116 DEG C.Due to tin, lead, bismuth, cadmium,
The fusing point of indium is lower, specifically, 232 DEG C of the fusing point of tin, 327 DEG C of the fusing point of lead, 271.3 DEG C of the fusing point of bismuth, the fusing point 321 of cadmium
DEG C, 156.4 DEG C of the fusing point of indium, the fusing point of above-mentioned each metal is respectively less than the fusing point of aluminium, and (and explosion rupture disk is using metallic aluminium at present, metal
The fusing point of aluminium is 660 DEG C), fusion is carried out using above-mentioned metal and prepares alloy, guarantees the fusing point of explosion rupture disk alloy being prepared
It is 100-116 DEG C.Explosion rupture disk of the present invention using 100-116 DEG C of fusing point of low-melting alloy as lithium battery cap, when lithium electricity
When thermal runaway occurs for pond, as long as lithium battery temperature is higher than 100 DEG C -116 DEG C, the alloy material of explosion rupture disk will start to melt, gold
Belong to key to be broken, explosion rupture disk alloy material strength reduction, to reduce the cracking pressure of explosion rupture disk, i.e. nut cap cracking pressure threshold
Value reduces, and then realizes and lose heart in advance, guarantees the security performance of battery.It is provided in an embodiment of the present invention for lithium battery cap
Explosion rupture disk can be prepared by following methods.
Correspondingly, the embodiment of the invention also provides a kind of preparation methods of explosion rupture disk for lithium battery cap.The party
Method includes the following steps:
S01. each alloy raw material component is weighed according to the element proportion of the above-mentioned explosion rupture disk for lithium battery cap；
S02. the high alloy raw material of fusing point is first melted, then the sequence according to fusing point from high to low, it is low successively adds fusing point
Alloy raw material carry out melting and obtain mixed molten liquid, while degasification and slagging-off are carried out to the mixed molten liquid；
S03. the mixed solution of the degasification and slagging-off is subjected to roughing into blank, rerolls and slab is made；
S04. the woollen is rolled into low melting point with the irreversible foil mill group of four-roller and closed by the slab rolling at woollen
Gold is as used for the explosion rupture disk of lithium battery cap.
Specifically, in above-mentioned steps S01, weighed according to a kind of above-mentioned element proportion of the explosion rupture disk for lithium battery cap
Each alloy raw material component, it is consistent with the above, it is no longer described herein.
In above-mentioned steps S02, the high alloy raw material of fusing point is first melted, then the sequence according to fusing point from high to low, according to
The secondary low-melting alloy raw material of addition carries out melting and obtains mixed molten liquid, guarantees that each metal material can melt completely, more favorably
In preparing alloy material, while degasification and slagging-off are carried out to the mixed molten liquid, improves the purity of alloy material.
In above-mentioned steps S03, the mixed solution of the degasification and slagging-off is subjected to roughing into blank, reroll manufactured Board
Base；Specifically, the melt after melting is introduced casting and rolling machine casting into blank, secondary rolling is carried out after blank is prepared, respectively
Are as follows: first the blank is rolled, rolls out the slab of thickness 6-10mm；Again by the slab cold mill complex of above-mentioned 6-10mm
It is rolled again, is rolling to the slab of thickness 4-5mm, carry out the solid interior use of blank that annealing is prepared later.
By the slab rolling at woollen in above-mentioned steps S04, the woollen is rolled with four-roller irreversible foil mill group
Low-melting alloy is made, is as used for the explosion rupture disk of lithium battery cap.Preferably, the woollen with a thickness of 0.03mm.
The preparation method of the above-mentioned explosion rupture disk for lithium battery cap, method is simple, and it is convenient to operate, and is conducive to industrialization system
It is standby to use.
The embodiment of the present invention also provides a kind of for lithium battery cap, it is preferred that the structure of the nut cap is conventional cylindrical
Battery cap structure, as shown in Figure 1 comprising top cap, sealing ring, PTC ring, explosion rupture disk, welding aluminium flake, wherein the top cap
Material be iron, main function is support, is connect with external spot welding；The material of the sealing ring is polypropylene, and main function is
Positive cover cap is isolated to contact with cathode steel shell.Sealed cell simultaneously；The material of the PTC ring is PTC, and main function is short-circuit big
Meeting internal resistance increases when electric current, reduces electric current；The explosion rupture disk is prepared using above-mentioned low-melting alloy material, in inside battery fusing point
When raising, the safety discouraged, battery is kept to use can be opened in advance；It in addition is welding aluminium flake there are one part, with electricity
Internal positive welding in pond disconnects with the solder joint of explosion rupture disk welding when air pressure inside increases, forms open circuit, cut off electric current.According to
The above loose mail makes battery cap, depending on specific nut cap size is according to different battery requests.It is used between small aluminium sheet and explosion rupture disk
Laser welding, welds breakpoint pulling force 0.9-1.2MPa, and the room temperature cracking pressure of explosion rupture disk is 1.8-2.4MPa.According to different explosion-proof
The material of piece alloy compositions is different, and as the temperature rises, the cracking pressure of explosion rupture disk can be gradually reduced, and be guaranteed in inside battery
Under conditions of high temperature, low pressure conditions can be opened, the safety that protection battery uses.
Since the nut cap includes the above-mentioned explosion rupture disk for lithium battery cap, then the lithium battery cap is in use process
In, since the fusing point of explosion rupture disk increases, pressure reduction is turned on, is switched under conditions of high-temperature low-pressure power, it can be to avoid
Since the safety for slowly leading to improve lithium battery using unsafe problem and using is opened in nut cap caused by fusing point is excessively high
Property.
The embodiment of the present invention also provides a kind of lithium battery, and the lithium battery includes above-mentioned lithium battery cap, then lithium electricity
In the use process of pond, security performance is improved.
It is further explained and illustrates below with reference to specific embodiment.
Embodiment 1
A kind of explosion rupture disk and preparation method thereof for lithium battery cap.
The material of the explosion rupture disk for lithium battery cap is 20%~24% tin；25%~30% lead；45%~
55% bismuth；0%~1.5% cadmium；0%~1.5% indium.
Explosion rupture disk weighs each alloy raw material component the preparation method is as follows: matching according to the element of above-mentioned explosion rupture disk；
It successively melts each alloy material progress melting of tin, cadmium, bismuth, tin, indium and obtains mixed molten liquid, while to the mixing
Melt carries out degasification and slagging-off；
The mixed solution of the degasification and slagging-off is subjected to roughing into blank, first the blank is rolled, is rolled out
The slab of thickness 6-10mm；Again the slab of above-mentioned 6-10mm is rolled again with cold mill complex, is rolling to thickness 4-5mm's
Slab carries out the solid interior use of blank that annealing is prepared later.
By the slab rolling at the woollen with a thickness of 0.03mm, the woollen is rolled with four-roller irreversible foil mill group
At low-melting alloy, it to be as used for the explosion rupture disk of lithium battery cap.
Embodiment 2
A kind of explosion rupture disk and preparation method thereof for lithium battery cap.
The material of the explosion rupture disk for lithium battery cap is 22%~26% tin；0%~1.5% lead；50%~
55% bismuth；18%~21% cadmium；0%~1.5% indium.
Explosion rupture disk weighs each alloy raw material component the preparation method is as follows: matching according to the element of above-mentioned explosion rupture disk；
It successively melts each alloy material progress melting of tin, cadmium, bismuth, tin, indium and obtains mixed molten liquid, while to the mixing
Melt carries out degasification and slagging-off；
The mixed solution of the degasification and slagging-off is subjected to roughing into blank, first the blank is rolled, is rolled out
The slab of thickness 6-10mm；Again the slab of above-mentioned 6-10mm is rolled again with cold mill complex, is rolling to thickness 4-5mm's
Slab carries out the solid interior use of blank that annealing is prepared later.
By the slab rolling at the woollen with a thickness of 0.03mm, the woollen is rolled with four-roller irreversible foil mill group
At low-melting alloy, it to be as used for the explosion rupture disk of lithium battery cap.
Embodiment 3
A kind of explosion rupture disk and preparation method thereof for lithium battery cap.
The material of the explosion rupture disk for lithium battery cap is 24%~28% tin；10%~20% lead；55%~
65% bismuth；0%~1.5% cadmium；0%~1.5% indium
Explosion rupture disk weighs each alloy raw material component the preparation method is as follows: matching according to the element of above-mentioned explosion rupture disk；
It successively melts each alloy material progress melting of tin, cadmium, bismuth, tin, indium and obtains mixed molten liquid, while to the mixing
Melt carries out degasification and slagging-off；
The mixed solution of the degasification and slagging-off is subjected to roughing into blank, first the blank is rolled, is rolled out
The slab of thickness 6-10mm；Again the slab of above-mentioned 6-10mm is rolled again with cold mill complex, is rolling to thickness 4-5mm's
Slab carries out the solid interior use of blank that annealing is prepared later.
By the slab rolling at the woollen with a thickness of 0.03mm, the woollen is rolled with four-roller irreversible foil mill group
At low-melting alloy, it to be as used for the explosion rupture disk of lithium battery cap.
Comparative example
Select one on the market explosion rupture disk material for 1060AL cylinder type lithium battery.
The explosion rupture disk preparation nut cap of the offer of above-described embodiment 1~3 is provided, cylinder type lithium battery is formed, with comparative example
Cylinder type lithium battery be tested for the property, test its melting temperature and cracking pressure respectively.Test result such as table 1.
Table 1
According to above-mentioned table 1, the table 1 is the explosion rupture disk performance test of explosion rupture disk and comparative example that Examples 1 to 3 is prepared
As a result.When the material melting temperature of explosion rupture disk be 100 DEG C (embodiment 1) when, when inside battery reaction temperature 100 degrees Celsius with
Lower cracking pressure 2.0MPa, when temperature be 100-120 degrees Celsius 1-10 minute, cracking pressure drops to 1.2MPa, declines 40%；
When temperature 120-300 degrees Celsius of 1-10 minutes, cracking pressure dropped to 0.2MPa, decline 90%.
When the material melting temperature of explosion rupture disk is 103 DEG C (embodiment 2), when the temperature 100 of inside battery reaction is Celsius
Cracking pressure 2.0MPa below spending, when temperature 100-120 degrees Celsius of 1-10 minutes, cracking pressure dropped to 1.3MPa, decline
35%, when temperature 120-300 degrees Celsius of 1-10 minutes, cracking pressure dropped to 0.3MPa, decline 85%.
When the material melting temperature of explosion rupture disk is 116 DEG C (embodiment 3), when the temperature of inside battery reaction is temperature
100 degrees Celsius hereinafter, cracking pressure 2.0MPa, when temperature 100-120 degrees Celsius of 1-10 minutes, cracking pressure dropped to
1.4MPa, decline 30%；When temperature 120-300 degrees Celsius of 1-10 minutes, cracking pressure dropped to 1.2MPa, decline 40%.
And material described in comparative example is the lithium battery of the common material of 1060AL, when 100 degrees Celsius of temperature hereinafter, opening pressure
Power 2.0MPa；It is temperature 100-120 degrees Celsius of 1-10 minutes, cracking pressure 2.0MPa, unchanged；120-300 degrees Celsius of 1- of temperature
It is 10 minutes, cracking pressure 2.0MPa, unchanged.
To sum up, when explosion rupture disk material changes, low-melting alloy is changed into, as the fusing point of explosion rupture disk material is higher,
Alloy can start dissolved state occur, the fracture of its metallic bond of Microscopic, its alloy strength of macro manifestations reduces, and then reduce
The nut cap of cracking pressure the invention of explosion rupture disk can reduce cracking pressure threshold value, lose heart in advance, guarantee cell safety.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of explosion rupture disk for lithium battery cap, which is characterized in that the alloy material of the explosion rupture disk include tin, lead, bismuth,
At least two of cadmium, indium；
The fusing point of the explosion rupture disk is 100-116 DEG C.
2. the explosion rupture disk according to claim 1 for lithium battery cap, which is characterized in that be used for lithium battery cap with described
The alloy total weight of the explosion rupture disk of cap is 100% meter, and the explosion rupture disk includes the following component of following weight percent:
3. the explosion rupture disk according to claim 1 to 2 for lithium battery cap, which is characterized in that be used for lithium with described
The alloy total weight of the explosion rupture disk of battery cap is 100% meter, and the explosion rupture disk includes the following component of following weight percent:
4. the explosion rupture disk according to claim 1 to 2 for lithium battery cap, which is characterized in that be used for lithium with described
The alloy total weight of the explosion rupture disk of battery cap is 100% meter, and the explosion rupture disk includes the following component of following weight percent:
5. the explosion rupture disk according to claim 1 to 2 for lithium battery cap, which is characterized in that be used for lithium with described
The alloy total weight of the explosion rupture disk of battery cap is 100% meter, and the explosion rupture disk includes the following component of following weight percent:
6. a kind of preparation method of the explosion rupture disk for lithium battery cap, comprising the following steps:
Each alloy raw material is weighed according to the element proportion of any explosion rupture disk for lithium battery cap of the claims 1-5
Component；
The first high alloy raw material of fusing fusing point, then the sequence according to fusing point from high to low, it is former successively to add low-melting alloy
Material carries out melting and obtains mixed molten liquid, while carrying out degasification and slagging-off to the mixed molten liquid；
The mixed solution of the degasification and slagging-off is subjected to roughing into blank, rerolls and slab is made；
By the slab rolling at woollen, the woollen is rolled into low-melting alloy with four-roller irreversible foil mill group, as
Explosion rupture disk for lithium battery cap.
7. the preparation method of the explosion rupture disk according to claim 6 for lithium battery cap, which is characterized in that the rolling
At slab the following steps are included:
The blank is rolled, the slab of thickness 6-10mm is rolled out；
The slab of above-mentioned 6-10mm is rolled again with cold mill complex, the slab of thickness 4-5mm is rolling to, is moved back later
Fire.
8. the preparation method of the explosion rupture disk according to claim 6 or 7 for lithium battery cap, which is characterized in that described
Woollen with a thickness of 0.03mm.
9. a kind of lithium battery cap, which is characterized in that the lithium battery cap, which includes that Claims 1 to 5 is any described, to be used for
The explosion rupture disk of lithium battery cap.
10. a kind of lithium battery, which is characterized in that the lithium battery includes lithium battery cap described in the claims 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910271272.8A CN110137411A (en) | 2019-04-04 | 2019-04-04 | Explosion rupture disk and its preparation method and application for lithium battery cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910271272.8A CN110137411A (en) | 2019-04-04 | 2019-04-04 | Explosion rupture disk and its preparation method and application for lithium battery cap |
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| CN110137411A true CN110137411A (en) | 2019-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910271272.8A Pending CN110137411A (en) | 2019-04-04 | 2019-04-04 | Explosion rupture disk and its preparation method and application for lithium battery cap |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116497292A (en) * | 2023-05-31 | 2023-07-28 | 贵州梅岭电源有限公司 | Composite material for reducing internal air pressure of thermal battery and preparation method and application thereof |
| CN116776674A (en) * | 2023-06-06 | 2023-09-19 | 浙江大学湖州研究院 | Finite element modeling method for predicting damage behavior of inner burst piece of cap structure under thermal runaway of lithium battery |
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| CN101469386A (en) * | 2007-04-12 | 2009-07-01 | 日本轻金属株式会社 | Aluminum alloy sheet for battery cover and its production method |
| CN109371291A (en) * | 2018-11-22 | 2019-02-22 | 合肥天沃能源科技有限公司 | New energy resource power battery shell and the lid preparation method of aluminum alloy materials |
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| US6159630A (en) * | 1998-03-30 | 2000-12-12 | Renata Ag | Safety vent for storage battery or cell |
| CN1797815A (en) * | 2004-12-28 | 2006-07-05 | 北京有色金属研究总院 | Temperature controlled safety device in use for batteries, and method, and batteries with safety device being installed |
| CN101469386A (en) * | 2007-04-12 | 2009-07-01 | 日本轻金属株式会社 | Aluminum alloy sheet for battery cover and its production method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116497292A (en) * | 2023-05-31 | 2023-07-28 | 贵州梅岭电源有限公司 | Composite material for reducing internal air pressure of thermal battery and preparation method and application thereof |
| CN116776674A (en) * | 2023-06-06 | 2023-09-19 | 浙江大学湖州研究院 | Finite element modeling method for predicting damage behavior of inner burst piece of cap structure under thermal runaway of lithium battery |
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