CN102394280A - Aluminum casing lithium ion battery with corrosion resistant protection apparatus - Google Patents
Aluminum casing lithium ion battery with corrosion resistant protection apparatus Download PDFInfo
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- CN102394280A CN102394280A CN2011103975211A CN201110397521A CN102394280A CN 102394280 A CN102394280 A CN 102394280A CN 2011103975211 A CN2011103975211 A CN 2011103975211A CN 201110397521 A CN201110397521 A CN 201110397521A CN 102394280 A CN102394280 A CN 102394280A
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- battery
- aluminum
- protective device
- corrosion protective
- lithium ion
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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
Abstract
The invention discloses an aluminum casing lithium ion battery with a corrosion resistant protection apparatus. The battery comprises a battery electrode core and a battery housing. The battery electrode core is positioned in the battery housing. Electrolyte is injected into the battery housing, and the battery housing is sealed by using an aluminum casing cap component. The aluminum casing cap component comprises a corrosion resistant protection apparatus prepared from bonded materials of a conductive metallic glue and aluminum metal. A top cover of the cap is connected with an anode lead connecting piece on the cap. With the battery provided by the invention, a problem of aluminum casing batteries of poor corrosion resistance is solved, a hidden danger of inflation is also eliminated, and security and leak tightness of the aluminum casing battery are improved. When hidden dangers of acupuncturing, short circuit, and over-charging are occurred to the aluminum casing battery, the aluminum casing provides a self-protection function. Therefore, the battery can be used in fields with high requirements on security and specific energy.
Description
Technical field
The present invention relates to the lithium ion battery field, be specifically related to a kind of aluminum hull lithium ion battery that has anti-corrosion protective device.
Background technology
Lithium ion battery mainly is divided into three types according to enclosure material in the prior art; Metal shell, plastic casing and aluminum-plastic composite membrane shell, though plastic casing can electrolyte resistance corrosion because weak heat-dissipating; When high rate charge-discharge, deform housing seal property difference and poor fire easily; And corrosion and flatulence take place in battery that the aluminum-plastic composite membrane shell is made easily, relative metal shell, and sealing is relatively poor; Metallic steel shell material cost and production cost are higher, and sealing is good, are widely used in the lithium ion battery field at present; But, battery reaches demand cheaply along with using lightweight; The competitive advantage of the shell of aluminium material on quality and price highlights, but because aluminum metal is an amphoteric metal, its meeting and acid-base reaction; Cause the aluminium shell defectives such as burn into flatulence to occur, thereby restricted its application on lithium ion battery.
In the open CN101345293A of patent, a kind of aluminum hull lithium ion battery is proposed; Comprise cap, housing and be contained in the positive and negative electrode pole piece in the housing; Said cap is provided with two electrode fairleads; Be connected with anode electrode hermetically-sealed construction and negative electrode hermetically-sealed construction respectively; Said electrode sealing construction comprises brace, pass that battery case covers the rivet of rivet hole setting and at the convex packing ring between battery cap and the rivet be placed in the spill packing ring on the rivet, between cap and brace, said cap, housing are aluminum hull; At least one is made up of conductive plastics in the spill packing ring of said anode electrode hermetically-sealed construction and the convex packing ring, and the resistance value of conductive plastics is 10
2~ 10
4Ohm.This invention has realized making lithium ion battery with aluminum hull, and can effectively stop aluminum hull to be corroded by electrolyte, and spark phenomenon can not occur.But adopt the battery of this invention making owing to adopt conductive plastics and contain the spill packing ring or the convex packing ring of the composite material of filler as sealing; Swelling takes place in this composite material easily in electrolyte; Thereby make the sealing of battery cover board reduce; There is flatulence hidden danger in battery, thereby can't accomplish scale production.
Summary of the invention
Technical problem to be solved by this invention provides and does not a kind ofly have flatulence hidden danger, good airproof performance, corrosion resistance is good and improves the aluminum hull lithium ion battery that has anti-corrosion protective device of security performance.
For achieving the above object, the invention provides a kind of aluminum hull lithium ion battery that has anti-corrosion protective device, it comprises a Battery Pole Core and a battery body; Battery Pole Core is inserted in the battery body, inject electrolyte in the battery body, and adopt the sealing of aluminum hull cover plate assembly; Wherein, Said aluminum hull cover plate assembly contains an anti-corrosion protective device, and this device is processed by conducting metal glue and aluminum metal bonding, and the positive pole ear brace on cover plate top cover and the cover plate is linked together.
The above-mentioned aluminum hull lithium ion battery that has anti-corrosion protective device, wherein, described anti-corrosion protective device comprises:
Adopt two aluminum metal bars of conducting metal glue bond, wherein, aluminum metal strip adoption polypropylene tape coats to be handled;
Seal the aluminum-plastic composite membrane of the aluminum metal bar of this bonding, this aluminum-plastic composite membrane electrolyte resistance corrosion; And
The annular seal space that aluminum-plastic composite membrane sealed aluminum bonding jumper forms.
The above-mentioned aluminum hull lithium ion battery that has anti-corrosion protective device wherein, is filled with inert gas in the annular seal space of described anti-corrosion protective device.
The above-mentioned aluminum hull lithium ion battery that has anti-corrosion protective device; Wherein, The preparation method of said anti-corrosion protective device is: adopting the conducting metal glue bond between two aluminum metal bars that have polypropylene tape; The plastic-aluminum combined film phonograph seal that corrodes with electrolyte resistance then, and in annular seal space, charge into inert gas.
The above-mentioned aluminum hull lithium ion battery that has anti-corrosion protective device, wherein, described conducting metal glue is selected conductive silver glue or conduction aluminium glue.
The above-mentioned aluminum hull lithium ion battery that has anti-corrosion protective device, wherein, said anti-corrosion protective device is stuck on the cover plate top cover through a corrosion resistant buckle, avoids battery in vibration-testing, to come off.
Aluminium and alloy thereof are amphoteric metal, and the outer surface of aluminium has covered one deck oxide in atmosphere, and this has effectively slowed down the corrosion rate of aluminum metal.But in the pH value reached greater than 8 environment less than 4, easy origination point corrosion of aluminium and aluminium alloy and crevice corrosion caused the inefficacy of aluminum metal.
The aluminum hull cap of lithium ion battery comprises anodal aluminium brace and negative pole copper, nickel or copper nickel plating brace; The standard electrode potential of aluminium is-1.66V; The standard electrode potential of copper is 0.337V, because electrode potential is negative more, metal loses electronics more easily and is converted in the ionic condition entering solution; Metal is more not corrosion-resistant, at electrolyte LiPF
6Under the existence condition, the lithium ion of free state can embed aluminium ion and combine to form lithium-aluminium alloy, thereby causes the electrochemical corrosion of aluminum metal.
In order to satisfy the demand of aluminum hull lithium ion battery security and corrosion resistance simultaneously; Adopt anti-corrosion protective device to be connected between aluminum-shell battery cap top cover and the cathode metal brace; Make aluminum hull shell positively charged so on the one hand, the electrode potential of aluminium shell improves, and aluminum metal gets into stable passivation region; Avoid the corrosion of aluminium outer cover metal, thereby reached the effect of anodic protection.On the other hand when battery generation acupuncture, short circuit and when potential safety hazard such as overcharging; The anti-corrosion protective device that is arranged on the cover plate top cover has passed through very big electric current owing to moment; Thereby be bonded in the directly fusing of conducting metal glue between the two aluminum metal bars; Thereby guarantee that timely battery case is in state of insulation, filled the plastic-aluminum combined film phonograph seal of inert gas, thereby avoided spark phenomenon occurring in the moment of fusing because anti-corrosion protective device adopts; Thereby effectively guaranteed the fail safe of battery, made the aluminum hull lithium ion battery reach purpose corrosion-resistant and the raising fail safe.
In some embodiments, said aluminum-shell battery cover plate of outer casing assembly also comprises pole, sealing gasket, cover plate top cover, explosion-proof valve, lug brace and rivet.
In some embodiments; Said anti-corrosion protective device is processed by conducting metal glue and aluminum metal bonding; Conducting metal glue preferred conduction elargol or conduction aluminium glue; Adopting conducting metal glue bond, the plastic-aluminum combined film phonograph seal that corrodes with electrolyte resistance then between two aluminum metal bars that have polypropylene tape.Can realize hermetically sealedly after the heat-sealing between polypropylene tape and the aluminum-plastic composite membrane, avoid anti-corrosion protective device to be corroded by electrolyte, thus the reliability of raising device.
In some embodiments, the preferred lead of said anti-corrosion protective device is the PTC device of aluminum metal, and this is the contact corrosion that dissimilar metal under the condition that exists at electrolyte, occurs.
The battery cover board assembly that the present invention forms fully through sealing gasket and seals, insulate; And through connecting the anti-corrosion protective device of the cathode metal brace (positive pole ear brace) on cover plate top cover and the cover plate top cover; Improve the corrosion resistance of battery; Eliminate the inflatable hidden danger of battery, improve the security performance of battery.Battery provided by the invention is made, simple installation, and fail safe is good, is particularly useful for large-scale electrokinetic cell.
The present invention has following beneficial effect:
(1) the present invention has remedied the corrosion of existing aluminum-shell battery existence and the hidden danger of inflatable with adopting anti-corrosion protective device to be connected between aluminum hull cover plate top cover and the cathode metal brace, thereby has improved the corrosion resistance of battery container.
(2) the present invention adopts conducting metal glue protective device as intercell connector; Can play the fuse effect; Make aluminum hull when potential safety hazard such as acupuncture, short circuit take place, overcharge, in time break off between aluminium shell and the positive pole and being connected, thereby effectively raise the security performance of lithium ion aluminum-shell battery.
Description of drawings
Fig. 1 is the aluminum hull lithium ion battery outline drawing of the embodiment of the invention 1;
Fig. 2 is the installation diagram of anti-corrosion protective device on housing-plate assembly 1 among Fig. 1 of the present invention.
Embodiment
Through specific embodiment the present invention is done further description below in conjunction with accompanying drawing, these embodiment only are used to explain the present invention, are not the restriction to protection range of the present invention.
Embodiment 1
Like Fig. 1 and shown in Figure 2; Be a kind of aluminum hull lithium ion battery that has anti-corrosion protective device; It comprises aluminum hull cover plate assembly 1, battery body 2 and is contained in the Battery Pole Core 3 in the battery body 2; Inject electrolyte in the battery body, said cover plate assembly comprises pole 4, sealing gasket 5, cover plate top cover 6, explosion-proof valve 7, lug brace 8 and rivet 9 and anti-corrosion protective device 10.This cover plate top cover 6 is provided with some through holes, and (not shown in the figures, the effect of this through hole is to be used for rivet 9 to penetrate cover plate top cover 6 with fixing pole 4; Preferably, two through holes are respectively established in cover plate top cover 6 both sides).Described sealing gasket also be provided with the cover plate top cover on through hole respective numbers and the through hole of size, the sealing gasket 5 that will contain through hole places around the through hole of cover plate top cover 6, and these cover plate top cover 6 inside and outside both sides are provided with sealing gasket 5.Further, sealing pad 5 is selected PFA material (that is soluble poly tetrafluoroethene) for use; It has preferably high temperature resistant and the chemical resistance characteristic; Also have good electrical property, its electrical insulating property is temperature influence not, is not easy by the electrolyte swelling; The flatulence problem can be do not occurred, sealing effectiveness can be reached well.Described pole 4 and lug brace 8 place the inside and outside both sides of cover plate top cover 6 respectively, adopt then rivet 9 with its riveting to the cover plate top cover 6 of battery, thereby form closely, the battery cover board assembly 1 of insulation.Also has explosion-proof valve 7 on the cover plate assembly 1.With adopting anti-corrosion protective device 10 to be connected between cover plate top cover 6 and the positive pole ear brace 8.
Said cover plate top cover 6 and battery body 2 are aluminium material; Said anti-corrosion protective device 10 is processed by conducting metal glue and aluminum metal bonding; Said conducting metal glue preferred conduction elargol or conduction aluminium glue, particularly, adopting the conducting metal glue bond between two aluminum metal bars that are coated with polypropylene tape; The plastic-aluminum combined film phonograph seal that corrodes with electrolyte resistance then, and in annular seal space, charge into inert gas.Preferably, said anti-corrosion protective device 10 is stuck on the upper cover plate top cover 6 through a corrosion resistant buckle 11, comes off in vibration-testing to avoid battery.
After aluminum hull cover plate assembly and battery body and the Battery Pole Core body that will have an anti-corrosion protective device is assembled into battery, carry out high-temperature baking, inject electrolyte then, carry out preliminary filling after battery one-tenthization a period of time, seal; Partial volume then.The aluminum hull lithium ion battery of making is tested as follows:
(1) safety test: adopt the draw point of Φ 8mm to carry out pin prick test, adopt the external internal resistance short circuit 10min of 2m to carry out short-circuit test, adopt the constant current source of stable pressure to carry out of the overcharge test of 1C constant current charge to 10V.
(2) vibration-testing: the battery that will be full of electricity with anchor clamps is fastened on the vibration mechine, carries out the linear frequency sweep vibration test: 1. discharging current: 1I
1(A); 2. direction of vibration: Z axis vibration; 3. vibration frequency: 10Hz～50Hz; 4. peak acceleration; 30m/s
25. frequency sweep circulation: 10 times; 6. time of vibration: 1h.
(3) high-temperature storage test: the battery that in 80 ℃ of high-temperature cabinets, stores 100%SOC, 50%SOC, 20%SOC; Weekly battery is taken out from high-temperature cabinet, carry out two and charge and discharge circulation entirely, the discharge capacity of recording cell; With the SOC state (battery charge state) of battery recharge, under given temperature conditions, store then to regulation.When irrecoverable capacity reaches 80% rated capacity or bimestrial storage time when reaching, whether termination test is dissected battery then and is observed battery and corrode.
Above-mentioned result of the test shows:
(1) battery in acupuncture, short circuit and overcharge all do not occur in the test smoldering, burning and explosion phenomenon, the battery maximum temperature is all below 100 ℃, this shows that this battery has good fail safe.
(2) phenomenons such as the sharp change of discharging current, electric voltage exception, battery case distortion, electrolyte overflow do not appear in battery when vibration-testing.
(3) battery is through after the high-temperature storage, and battery can normally discharge and recharge, and dissects through battery and finds that corrosion product AlF does not appear in battery
3
A kind of aluminum hull lithium ion battery that has anti-corrosion protective device; Comprise cover plate assembly 1, battery body 2 and be contained in the Battery Pole Core 3 in the battery body 2; Said cover plate assembly 1 comprises anti-corrosion protective device 10; This is anti-corrosion, and protective device 10 is the PTC device of aluminum metal by the metal lead, and the resistance of PTC is 20m to 1.Adopt Laser Welding that the one of which end is welded on the cover plate top cover 6 of cover plate assembly 1 then, the other end is welded on the positive pole ear brace 8.
In some embodiments; The thickness of said metal lead is 0.05mm-0.2mm, and width is 1mm-10mm, and wherein preferred thickness is 0.1mm; Width is 2mm-6mm, in actual application, decides the diameter of thickness, width or the lead of metal lead according to the size of short circuit current.
In some embodiments, said anti-corrosion protective device one end is welded on the cover plate top cover of cover plate assembly, and the other end is welded on the cathode metal brace or aluminium collector of cover plate top cover.
In some embodiments, the material of said battery cover board assembly and battery body is fine aluminium, almag, alumal or aluminum titanium alloy etc.
Although content of the present invention has been done detailed introduction through above-mentioned preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute all will be conspicuous.Therefore, protection scope of the present invention should be limited appended claim.
Claims (6)
1. aluminum hull lithium ion battery that has anti-corrosion protective device; Comprise a Battery Pole Core (3) and a battery body (2); Battery Pole Core (3) is inserted in the battery body (2), inject electrolyte in the battery body (2), and adopt aluminum hull cover plate assembly (1) sealing; It is characterized in that; Said aluminum hull cover plate assembly (1) contains an anti-corrosion protective device (10), and this device is processed by conducting metal glue and aluminum metal bonding, and the positive pole ear brace (8) on cover plate top cover (6) and the cover plate is linked together.
2. the aluminum hull lithium ion battery that has anti-corrosion protective device as claimed in claim 1 is characterized in that, described anti-corrosion protective device (10) comprises:
Adopt two aluminum metal bars of conducting metal glue bond, wherein, aluminum metal strip adoption polypropylene tape coats to be handled;
Seal the aluminum-plastic composite membrane of the aluminum metal bar of this bonding, this aluminum-plastic composite membrane electrolyte resistance corrosion; And
The annular seal space that aluminum-plastic composite membrane sealed aluminum bonding jumper forms.
3. the aluminum hull lithium ion battery that has anti-corrosion protective device as claimed in claim 2 is characterized in that, is filled with inert gas in the annular seal space of described anti-corrosion protective device (10).
4. the aluminum hull lithium ion battery that has anti-corrosion protective device as claimed in claim 3; It is characterized in that; The preparation method of said anti-corrosion protective device (10) is: adopting the conducting metal glue bond between two aluminum metal bars that have polypropylene tape; The plastic-aluminum combined film phonograph seal that corrodes with electrolyte resistance then, and in annular seal space, charge into inert gas.
5. like any described aluminum hull lithium ion battery that has anti-corrosion protective device in the claim 1 ~ 4, it is characterized in that described conducting metal glue is selected conductive silver glue or conduction aluminium glue.
6. the aluminum hull lithium ion battery that has anti-corrosion protective device as claimed in claim 5 is characterized in that, said anti-corrosion protective device (10) is stuck on the cover plate top cover (6) through a corrosion resistant buckle (11), avoids battery in vibration-testing, to come off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110397521.1A CN102394280B (en) | 2011-12-05 | 2011-12-05 | Aluminum casing lithium ion battery with corrosion resistant protection apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110397521.1A CN102394280B (en) | 2011-12-05 | 2011-12-05 | Aluminum casing lithium ion battery with corrosion resistant protection apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN102394280A true CN102394280A (en) | 2012-03-28 |
| CN102394280B CN102394280B (en) | 2014-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110397521.1A Expired - Fee Related CN102394280B (en) | 2011-12-05 | 2011-12-05 | Aluminum casing lithium ion battery with corrosion resistant protection apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113930817A (en) * | 2021-10-12 | 2022-01-14 | 合肥国轩高科动力能源有限公司 | Treatment method of aluminum shell for lithium ion battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101345293A (en) * | 2008-08-20 | 2009-01-14 | 苏州星恒电源有限公司 | Lithium ion battery with aluminum case |
| CN201450036U (en) * | 2009-06-24 | 2010-05-05 | 东莞新能源科技有限公司 | Lithium-ion battery combination cap |
| CN201994346U (en) * | 2010-12-10 | 2011-09-28 | 东莞新能源科技有限公司 | Power battery metal housing |
-
2011
- 2011-12-05 CN CN201110397521.1A patent/CN102394280B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101345293A (en) * | 2008-08-20 | 2009-01-14 | 苏州星恒电源有限公司 | Lithium ion battery with aluminum case |
| CN201450036U (en) * | 2009-06-24 | 2010-05-05 | 东莞新能源科技有限公司 | Lithium-ion battery combination cap |
| CN201994346U (en) * | 2010-12-10 | 2011-09-28 | 东莞新能源科技有限公司 | Power battery metal housing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113930817A (en) * | 2021-10-12 | 2022-01-14 | 合肥国轩高科动力能源有限公司 | Treatment method of aluminum shell for lithium ion battery |
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| CN102394280B (en) | 2014-03-19 |
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