CN101694881A - Safe cylindrical lithium-manganese dioxide battery - Google Patents
Safe cylindrical lithium-manganese dioxide battery Download PDFInfo
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- CN101694881A CN101694881A CN200910193191A CN200910193191A CN101694881A CN 101694881 A CN101694881 A CN 101694881A CN 200910193191 A CN200910193191 A CN 200910193191A CN 200910193191 A CN200910193191 A CN 200910193191A CN 101694881 A CN101694881 A CN 101694881A
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- cylindrical lithium
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- FBDMJGHBCPNRGF-UHFFFAOYSA-M [OH-].[Li+].[O-2].[Mn+2] Chemical compound [OH-].[Li+].[O-2].[Mn+2] FBDMJGHBCPNRGF-UHFFFAOYSA-M 0.000 title claims abstract description 30
- 239000004033 plastic Substances 0.000 claims abstract description 28
- 229920003023 plastic Polymers 0.000 claims abstract description 28
- 238000009413 insulation Methods 0.000 claims abstract description 27
- 239000003792 electrolyte Substances 0.000 claims abstract description 24
- 239000012943 hotmelt Substances 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000003466 welding Methods 0.000 claims abstract description 8
- 238000010276 construction Methods 0.000 claims description 25
- -1 polyethylene Polymers 0.000 claims description 25
- 238000005260 corrosion Methods 0.000 claims description 21
- 230000007797 corrosion Effects 0.000 claims description 21
- 229910052782 aluminium Inorganic materials 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 11
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 10
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 10
- 239000004698 Polyethylene Substances 0.000 claims description 9
- 229920000573 polyethylene Polymers 0.000 claims description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- 239000004793 Polystyrene Substances 0.000 claims description 8
- 239000004411 aluminium Substances 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229920002223 polystyrene Polymers 0.000 claims description 8
- 239000010935 stainless steel Substances 0.000 claims description 8
- 230000004888 barrier function Effects 0.000 claims description 7
- 230000010220 ion permeability Effects 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 6
- 239000004743 Polypropylene Substances 0.000 claims description 6
- 239000010962 carbon steel Substances 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000003860 storage Methods 0.000 abstract description 7
- 238000002955 isolation Methods 0.000 abstract description 2
- 238000004804 winding Methods 0.000 abstract 3
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 239000003566 sealing material Substances 0.000 abstract 1
- 230000035939 shock Effects 0.000 abstract 1
- 239000011521 glass Substances 0.000 description 18
- 238000005516 engineering process Methods 0.000 description 14
- 229910052744 lithium Inorganic materials 0.000 description 14
- 238000013461 design Methods 0.000 description 13
- 238000012360 testing method Methods 0.000 description 13
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 11
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 10
- 238000007373 indentation Methods 0.000 description 9
- 210000004027 cell Anatomy 0.000 description 8
- 238000004880 explosion Methods 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 239000011149 active material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000010963 304 stainless steel Substances 0.000 description 4
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 4
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 4
- 239000012212 insulator Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000011076 safety test Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 239000005486 organic electrolyte Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- KLARSDUHONHPRF-UHFFFAOYSA-N [Li].[Mn] Chemical compound [Li].[Mn] KLARSDUHONHPRF-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 239000008393 encapsulating agent Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Images
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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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Gas Exhaust Devices For Batteries (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention relates to a cylindrical lithium-manganese dioxide battery. The safe cylindrical lithium-manganese dioxide battery comprises a battery case and a safe structure winding core positioned in the battery case, wherein a positive plate is connected with the battery case by a lug, a negative plate is connected with a seal assembly by the lug, and both ends of the safe structure winding core are respectively provided with an upper insulating ring and a lower insulating ring which play the roles of isolation, insulation, supporting and shock absorption. A circular cover plate of the hot melt electrolyte corrosion-resisting seal assembly is connected with the battery case by way of welding. The seal assembly comprises a T-shaped terminal post, sealed insulating plastics, the circular cover plate and a connecting ring. A self-starting blast-proof pressure relief device is designed on the top of the battery case and comprises a pressure release valve, a deformable groove, a positive terminal and an air chamber. The cylindrical lithium-manganese dioxide battery optimizes the dimension scales of the positive plate and the negative plate of the winding core, as well as the seam assembly, the sealing material quality and the pressure relief device on the battery case, thereby enhancing the safety of the battery, prolonging the storage life thereof and reducing the cost of production and materials simultaneously.
Description
Technical field
The invention belongs to technical field of chemical power, the improvement of the cylindrical lithium-manganese dioxide battery structure and material of more specifically saying so.
Background technology
The sealing means of cylindrical lithium-manganese dioxide battery has semitight and hermetically sealed two kinds.The former adopts the formula sealing of button limit, and the serviceability temperature scope of this battery is narrower, and when ambient temperature surpassed 60 ℃, electrolyte leakage appearred in battery easily.The battery that the present invention relates to belongs to hermetically sealed mode, adopts welded seal, the good weatherability of this battery, and the serviceability temperature scope is wideer, is widely used in industry and military domain.At present, in the black box of hermetically sealed cylindrical lithium-manganese dioxide battery, all adopt glass as insulating material between negative pole cover plate and the Positive Poles, the glass insulator that forms by high temperature sintering seals and insulate.Because interior organic electrolyte of glass insulator and battery and the electrolytic salt Long contact time that contains lithium ion can be corroded, the decreasing insulating of its glass, make battery produce the micro-short circuit phenomenon, thereby open circuit voltage, load capacity and the capacity of battery are descended, the storage life of battery shortens, during seriously corroded, directly cause battery to lose efficacy in advance.In order to overcome the deficiency of existing lithium-manganese dioxide battery seal glass insulating material corrosion resistance, Chinese patent 200820063174.2 " lithium-manganese cell glass insulator " is disclosed to be to adopt the surface applied organosilicon dope that contacts with electrolyte at glass insulator, stops electrolyte directly to contact with glass.This method can only delay the contact corrosion of seal glass and electrolyte, but can not fundamentally solve the glass corrosion problem.Because swelling in the lithium-manganese dioxide battery organic electrolyte, though do not dissolve, can take place in the organosilicon dope, after the organosilicon dope swelling, just can not be, and then break away from from glass surface well attached on glass, cause electrolyte and glass contact and corrode.Because the coefficient of expansion difference of glass and organosilicon dope is too big, when battery is heated or meets when cold, the organosilicon dope speed of stripping off can be faster.
For prevent that battery from blasting under abuse condition such as short circuit, charging, usually on battery case, make indentation, form weak part, like this, battery is improper produce when using high in press the avulsion indentation, pressure release rapidly reaches explosion-proof security purpose.Indentation can be in the side of battery, also can be in the bottom.From process complexity, actual effect with produce originally, be better than at the side indentation at the bottom indentation.The mode that discloses at battery case bottom indentation as Chinese patent 02245256.7 " column type lithium cell anti-explosion safety housing " and Chinese patent 200420045345.0 " column type lithium cell anti-explosion safety housing " reaches explosion-proof effect.In the mode of bottom indentation, the problem that have equally that technology is loaded down with trivial details, indentation thickness is wayward, be difficult for detecting, production cost is high; And one " flat " of the necessary welding in the prepared box hat of above-mentioned patented technology bottom, cover concavo-convex bottom, extremely be connected with electrical equipment with convenient, and reach the specious effect of battery.This has further increased production cost and difficulty of processing.Actual when carrying out safety test, because the indentation of this rigidity is directly washed open when inner pressure of battery raises, not distortion buffering, the probability height that causes battery generation heavy explosion and battery to fly out at a distance can not reach the safety requirements of U.S. UL1642 standard to lithium battery.
The takeup type lithium-manganese dioxide battery adopts banded positive and negative electrode, and the response area of kind electrode is big, the power output height of battery.This takeup type core strueture comprises that positive and negative electrode technical parameter, anodal proportioning etc. directly affect the fail safe and the self-discharge rate of battery.
In sum, develop etch-proof black box, technology is simple, production cost is low explosion-resistant enclosure and the good volume cored structure of security performance are the keys of cylindrical lithium-manganese dioxide battery.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of black box that prevents the electrolyte corrosion that has is provided, the explosion-resistant enclosure that technology is simple, production cost is low and when improper uses such as forced electric discharge and short circuit, inexplosive safe cylindrical lithium-manganese dioxide battery.
For solving the problems of the technologies described above, the technical scheme that the present invention realizes is:
Design a kind of safe cylindrical lithium-manganese dioxide battery, what comprise battery case and be positioned at battery case rolls up core by positive and negative plate by the ion permeability microporous barrier safeguard construction form of reeling, positive and negative plate is connected with anode ear, negative electrode lug respectively, and be drawn out on battery case positive and negative extreme by positive and negative lug, it is characterized in that: the battery case top is provided with self-opening type explosion-proof relief device, and battery bottom is connected with the black box of hot melt, anti-electrolyte corrosion.
As improvement to the prior art scheme, the two ends of safeguard construction volume core have been respectively equipped with the last dead ring and the following dead ring of isolated insulation, support and cushioning effect in the battery case of the present invention, last dead ring is between battery case top and safeguard construction volume core, and following dead ring is between black box and safeguard construction volume core.
Black box described in the technical solution of the present invention comprises T shape pole, sealed insulation plastics, circular cover and connecting ring, there is a circular port in the central authorities of circular cover, sealed insulation is plastic injection-moulded on circular cover, the central authorities of sealed insulation plastics also be provided with one with the concentric circular port in circular cover central, circular hole, circular port and connecting ring that T shape pole passes on the sealed insulation plastics are riveted sealing, and circular cover is connected with battery case by the mode of laser or argon arc welding.
Self-opening type explosion-proof relief device in the technical solution of the present invention comprises deformation groove, relief valve, air chamber, relief valve is uniformly distributed in the deformation groove, relief valve and deformation groove are interconnected to a complete toroidal cavity, are positioned at the battery positive terminal evagination setting at battery case top and form air chamber in battery positive terminal.
In order further to improve the fail safe of battery, described relief valve comprises the weak link of an edge of a knife shape, and the thickness of weak link is limited between 0.05mm～0.5mm; Also be laid with annular liner on the deformation groove.
In order to improve the fail safe of battery better, positive plate, the negative plate length ratio of safeguard construction volume core of the present invention are 1: 0.70～0.85, and the width ratio is 1: 0.80～0.95, and the thickness ratio is 1: 0.45～0.55.The outermost layer of safeguard construction volume core is a positive plate.
The present invention compared with prior art has following remarkable result:
1. the present invention adopts non-corrosive sealed insulation plastics to substitute the glass of easy corrosion in electrolyte as encapsulant, replace the T shape pole of glass high temperature (〉=900 ℃) sintering sealing and the process for sealing of circular cover with T shape pole and circular cover riveted joint sealing technology, from eliminated the glass corrosion phenomenon at all, guarantee in the battery long-term storage process, can not cause that voltage decline, internal resistance increase and capacity reduce; Simultaneously, the technology of the plastic seal assembly of this hot melt, anti-electrolyte corrosion is simple, not high to equipment requirements, has reduced production cost effectively; T shape pole obviously is better than glass sealing with antivibration, impact resistance that circular cover is connected by plastics sealing-in formation " soft " and forms the vibration resistance that " firmly " connects.
2. the present invention is by optimizing positive and negative electrode size proportioning, the usage ratio of control positive and negative electrode active material, guarantee battery not pressure release when forcing improper uses such as overdischarge, short circuit, not on fire, do not explode, improved the fail safe of battery in normal use effectively.
3. the present invention is at battery case top design explosion-proof relief device, and when causing inner pressure of battery to raise because of abuse, deformation at first takes place the deformation groove of explosion-proof relief device, increases the volume of inside battery air chamber, plays the compensator or trimmer pressure effect; When pressure further increases, relief valve is opened, thereby reaches the pressure-relief explosion-proof purpose; Simultaneously, when the inner pressure of battery rising, when temperature rises, sealed insulation plastics sealing-in part on hot melt, the anti-electrolyte corrosion black box also can be opened pressure release, particularly when battery is carried out burning test, when relief valve is opened pressure release, also form relief hole behind the sealed insulation plastic molting, the possibility of battery explosion is avoided in the pressure release of battery two ends fully.This structure makes the battery can releasing pressure automatically when running into baked wheaten cake, heavy impact and do not explode, and has greatly improved battery fail safe under extreme conditions, makes battery can reach the requirement of UL1642 lithium battery safety standard fully.
4. the present invention has designed the dead ring isolation respectively between hot melt, anti-electrolyte corrosion black box, safeguard construction volume core and battery top, insulating effect is played at black box, safeguard construction volume core and battery top, simultaneously safeguard construction volume core is risen and support and cushioning effect, prevent that battery from rolling up core distortion in assembling process, and to battery copying mechanically, playing cushioning effect when transportation, high vibration, further improved fail safe, stability and the reliability of battery.
5. the present invention is at battery case top design explosion-proof relief device, and the plane of positive terminal exceeds explosion-proof relief device plane, battery case bottom, forms projective structure, makes inside battery form bigger air chamber, has strengthened the fail safe of battery.The design of this protrusion of positive terminal makes battery packages more simple, only needs to increase on the deformation groove annular liner, and the thermoplastic sleeve pipe fixes this liner and gets final product outside entire cell again.Therefore, the explosion-proof relief device of battery steel shell top design of the present invention has been simplified production technology, has saved material, has reduced cost.
Description of drawings
Fig. 1 is the cutaway view of cylindrical lithium-manganese dioxide battery of the present invention;
Fig. 2 is the cutaway view of the black box of Fig. 1;
Fig. 3 is the explosion-proof relief device vertical view of Fig. 1;
Fig. 4 is the local amplification view of the relief valve of Fig. 3.
Embodiment
The invention will be further described below by embodiment.
Cylindrical lithium-manganese dioxide battery of the present invention, referring to Fig. 1～4, this battery comprises with manganese dioxide being the banded positive plate 1 of active material, with the metal lithium bands is negative plate 2, just, separate by ion permeability microporous barrier 3 between the negative plate, just, negative plate and ion permeability microporous barrier are wound into cylindric, form safeguard construction volume core, just, negative plate respectively with anode ear 9, negative electrode lug 10 connects, anode ear 9 is connected with battery case 4, negative electrode lug 10 and hot melt, the T shape pole 5 of the black box of anti-electrolyte corrosion connects, the two ends of safeguard construction volume core have last dead ring 11 and following dead ring 12 respectively, the metal shell top design has self-opening type explosion-proof relief device, hot melt, the circular cover 7 of anti-electrolyte corrosion black box is connected with battery case 4 by the mode of laser or argon arc welding.
The hot melt of this battery, anti-electrolyte corrosion black box are made up of T shape pole 5, sealed insulation plastics 6, circular cover 7 and connecting ring 8, there is a circular port in the central authorities of circular cover 7, sealed insulation is plastic injection-moulded on circular cover, the central authorities of sealed insulation plastics also have one with the concentric circular port in circular cover central, circular hole, circular port and connecting ring 8 that T shape pole passes on the sealed insulation plastics are riveted sealing.
Safeguard construction is rolled up core to the last dead ring of battery and the metal battery shell is isolated, and safeguard construction volume core risen support and cushioning effect simultaneously, and its material can be polyethylene, polypropylene, polystyrene, polytetrafluoroethylene, or their mixture; Following dead ring is isolated black box and safeguard construction volume core, safeguard construction volume core is risen support and cushioning effect simultaneously, and its material can be polyethylene, polypropylene, polystyrene, polytetrafluoroethylene, or their mixture.
During actual production, the material of T shape pole, circular cover and the connecting ring of the black box of hot melt, anti-electrolyte corrosion can be SUS302, SUS304 or SUS316 stainless steel, also can be metallic nickel or metallic aluminium, the sealed insulation plastics can be polyethylene, polypropylene, polystyrene, polytetrafluoroethylene, plasticity polytetrafluoroethylene, or their mixture.And property material for battery shell can be 304 stainless steels, carbon steel or stainless iron, also can be metallic nickel or metallic aluminium.
The positive and negative plate dimensional parameters proportioning of takeup type lithium-manganese dioxide battery volume core directly influences the fail safe of battery.In the volume core of the takeup type lithium-manganese dioxide battery of prior art, negative plate is longer than or is equaled positive plate, its positive and negative electrode leaf length than scope 1: 1.15～1.00, width than scope 1: 0.90～0.95, and thickness than scope 1: 0.37～0.40.This dimensional parameters explanation negative pole lithium metal is excessive, and excessive lithium metal is at the outermost layer of battery roll core, and the outermost layer of promptly rolling up core is a metal lithium bands.This battery is when forcing overdischarge, and the outermost layer lithium is easy to generate " Li dendrite ", causes the short circuit of inside battery positive and negative electrode, thereby causes battery explosion.The present invention is under the prerequisite that does not change anode formula, changed in the volume core of existing takeup type lithium-manganese dioxide battery, the tactic pattern of positive plate is longer than or is equaled to negative plate, just optimize, negative plate size proportioning, control just better, the usage ratio of negative electrode active material, and make the volume core outermost layer be positive plate, just, the negative pole homogeneous reaction, fully effectively utilize the highly active lithium metal of negative pole, after battery 100% discharge, metal lithium bands consumption is complete, and anodal manganese dioxide active material still has residue, eliminated the potential safety hazard of inside battery, thereby guaranteed that battery is not on fire when forcing overdischarge, do not explode.1: 0.70～0.85,1: 0.80～0.95, and width is advisable 1: 0.45～0.55 than scope than scope by thickness than scope for the positive and negative electrode leaf length of safeguard construction volume core during actual the manufacturing.
Self-opening type explosion-proof relief device of the present invention comprises deformation groove 13, relief valve 14, air chamber 16 and annular liner 17,1-8 relief valve can be set be uniformly distributed in the deformation groove, and relief valve and deformation groove are interconnected to a complete circle.Be positioned at the battery positive terminal 15 evagination settings at battery case top and form air chamber 16,, also can increase annular liner 17 on deformation groove 13 for the battery good looking appearance in battery positive terminal.The thickness of the weak link L of relief valve is to be advisable between 0.05mm～0.5mm.The thickness of weak link changes according to the design of employed material of metal battery shell and inside battery.
Embodiment one:
CR17335 type cylindrical lithium-manganese dioxide battery, this battery comprises with manganese dioxide being the positive plate of active material, the lithium anode sheet, just, negative plate length ratio is 1: 0.70, the width ratio is 1: 0.80, the thickness ratio is 1: 0.45, just, separate by the ion permeability microporous barrier between the negative plate, and be wound into cylindric safeguard construction volume core, positive plate is connected with the carbon steel battery case by lug, negative plate is by lug and hot melt, the T shape pole of the black box of anti-electrolyte corrosion connects, the two ends of volume core have on the polyethylene dead ring under the dead ring and polytetrafluoroethylene respectively, the design of carbon steel battery case has self-opening type explosion-proof relief device, and black box is connected with the carbon steel battery case by the argon arc welding manner.
The black box of hot melt, anti-electrolyte corrosion is made up of SUS302 stainless steel T shape pole, polyethylene sealed insulation plastics, SUS304 stainless steel circular cover and SUS316 stainless steel connecting ring, there is a circular port in the central authorities of circular cover, sealed plastic is injection-moulded on the circular cover, and circular port and connecting ring that T shape pole passes on the sealed insulation plastics are riveted sealing.
The design of self-opening type explosion-proof relief device is at carbon steel battery case top, and the self-opening type explosion-proof relief device of present embodiment is made up of 1 relief valve, deformation groove, positive terminal and air chamber, the thickness 0.05mm of relief valve weak link.
Get the technology of the present invention battery and prior art battery, all carry out safety test according to U.S. UL1642-2007 standard, the battery sample number of each test event is 10.The test result such as the table 1 of wherein the harshest test event battery short circuit, pressure overdischarge, heavy impact and burning test, the leakage situation such as the table 2 of battery battery after high-temperature storage front and back open circuit voltage, internal resistance, discharge capacity situation of change and high-temperature storage.
Table 1 battery short circuit, pressure overdischarge, heavy impact and combustion testing result
Table 2 battery initial state and 85 ℃, 80% relative humidity are deposited the electric performance test result after 45 days
Embodiment two:
CR17335 type cylindrical lithium-manganese dioxide battery, this battery comprises with manganese dioxide being the positive plate of active material, the lithium anode sheet is formed, just, negative plate length ratio is 1: 0.77, the width ratio is 1: 0.88, the thickness ratio is 1: 0.50, just, separate by the ion permeability microporous barrier between the negative plate, and be wound into columned safeguard construction volume core, positive plate is connected with 304 stainless steel battery cases by lug, negative plate is by lug and hot melt, the T shape pole of the black box of anti-electrolyte corrosion connects, the two ends of volume core have dead ring under last dead ring that polytetrafluoroethylene and polyethylene mixture material make and the polystyrene respectively, the design of 304 stainless steel battery cases has self-opening type explosion-proof relief device, and the cover plate of black box is connected with 304 stainless steel battery cases by the laser welding mode.
The black box of hot melt, anti-electrolyte corrosion is made up of aluminium T shape pole, plasticity teflon seal ambroin, SUS316 stainless steel circular cover and aluminium connecting ring, there is a circular port in the central authorities of circular cover, sealed insulation is plastic injection-moulded on circular cover, and circular port and connecting ring that T shape pole passes on the sealed insulation plastics are riveted sealing.
The design of self-opening type explosion-proof relief device is at 304 stainless steel battery case tops, and the self-opening type explosion-proof relief device of present embodiment is made up of 4 relief valves, deformation groove, positive terminal and air chamber, and the thickness of the weak link of relief valve is 0.2mm.
The technology of the present invention battery and prior art battery, all carry out safety test according to the UL1642-2007 standard, each project is respectively tested 10 batteries, wherein battery short circuit, force the test result such as the table 3 of overdischarge, heavy impact and burning test, result to show that the technology of the present invention battery can not blast in safety test.The leakage situation such as the table 4 of battery battery after high-temperature storage front and back open circuit voltage, internal resistance, discharge capacity situation of change and high-temperature storage, after the result shows that the technology of the present invention battery is deposited 45 days under 85 ℃, 80% relative humidity condition, battery the electrolyte leakage situation can not occur, and the electrical property of battery does not have big variation.
Table 3 battery short circuit, pressure overdischarge, heavy impact and combustion testing result
Table 4 battery initial state and 85 ℃, 80% relative humidity are deposited the test result after 45 days
Embodiment three:
CR17335 type cylindrical lithium-manganese dioxide battery, this battery comprises with manganese dioxide being the positive plate of active material, the lithium anode sheet, just, negative plate length ratio is 1: 0.85, the width ratio is 1: 0.95, the thickness ratio is 1: 0.55, just, separate by the ion permeability microporous barrier between the negative plate, and be wound into cylindric safeguard construction volume core, positive plate is connected with the aluminum cell shell by lug, negative plate is by lug and hot melt, the T shape pole of the black box of anti-electrolyte corrosion connects, the two ends of volume core have dead ring and the polystyrene following dead ring that material preparation becomes with polypropylene miser on the plasticity polytetrafluoroethylene respectively, the aluminum cell housing designs has self-opening type explosion-proof relief device, and black box is connected with the aluminum cell shell by the laser welding mode.
The black box of hot melt, anti-electrolyte corrosion is made up of sealed insulation plastics, aluminium circular cover and the SUS302 stainless steel connecting ring of the mixture material preparation of aluminium T shape pole, polyethylene and polystyrene, there is a circular port in the central authorities of circular cover, sealed insulation is plastic injection-moulded on circular cover, and circular port and connecting ring that T shape pole passes on the sealed insulation plastics are riveted sealing.
The design of self-opening type explosion-proof relief device is in the aluminum cell cover top portion, and the self-opening type explosion-proof relief device of present embodiment is made up of 8 relief valves, deformation groove, positive terminal and air chamber, and the thickness of relief valve weak link is 0.08mm.
The technology of the present invention battery and prior art battery are all tested according to U.S.'s UL1642-2007 standard, and test result is shown in table 5 and table 6.
Table 5 battery short circuit, pressure overdischarge, heavy impact and combustion testing result
Table 6 battery initial state and 85 ℃, 80% relative humidity are deposited the test result after 45 days
Claims (8)
1. the cylindrical lithium-manganese dioxide battery of a safety, what comprise battery case (4) and be positioned at battery case rolls up core by positive and negative plate by ion permeability microporous barrier (3) safeguard construction forms of reeling, positive and negative plate is connected with anode ear (9), negative electrode lug (10) respectively, and be drawn out to by positive and negative lug on the positive and negative electrode terminal of battery case, it is characterized in that: the battery case top is provided with self-opening type explosion-proof relief device, and battery bottom is connected with the black box of hot melt, anti-electrolyte corrosion.
2. safe cylindrical lithium-manganese dioxide battery according to claim 1, it is characterized in that: the two ends of safeguard construction volume core have been respectively equipped with the last dead ring (11) and the following dead ring (12) of isolated insulation, support and cushioning effect in the described battery case, last dead ring is between battery case top and safeguard construction volume core, and following dead ring is between black box and safeguard construction volume core.
3. safe cylindrical lithium-manganese dioxide battery according to claim 2, it is characterized in that: described black box comprises T shape pole (5), sealed insulation plastics (6), circular cover (7) and connecting ring (8), there is a circular port in the central authorities of circular cover (7), sealed insulation is plastic injection-moulded on circular cover (7), the central authorities of sealed insulation plastics also be provided with one with the concentric circular port in circular cover central, circular hole, circular port and connecting ring (8) that T shape pole (5) passes on the sealed insulation plastics are riveted sealing, and circular cover (7) is connected with battery case (4) by the mode of laser or argon arc welding.
4. safe cylindrical lithium-manganese dioxide battery according to claim 2, it is characterized in that: self-opening type explosion-proof relief device comprises deformation groove (13), relief valve (14), air chamber (16), relief valve is uniformly distributed in the deformation groove, relief valve and deformation groove are interconnected to a complete toroidal cavity, are positioned at battery positive terminal (15) the evagination setting at battery case top and form air chamber (16) in battery positive terminal.
5. safe cylindrical lithium-manganese dioxide battery according to claim 4, it is characterized in that: described relief valve (14) comprises the weak link of an edge of a knife shape, the thickness of weak link (L) is limited between 0.05mm～0.5mm, also is laid with annular liner (17) on the described deformation groove (13).
6. according to the described safe cylindrical lithium-manganese dioxide battery of claim 1～5, it is characterized in that: positive plate, the negative plate length ratio of described safeguard construction volume core are 1: 0.70～0.85, the width ratio is 1: 0.80～0.95, the thickness ratio is 1: 0.45～0.55, and the outermost layer of safeguard construction volume core is a positive plate.
7. safe cylindrical lithium-manganese dioxide battery according to claim 6 is characterized in that: the material of the last dead ring of battery, following dead ring can be polyethylene, polypropylene, polystyrene, polytetrafluoroethylene, or their mixture.
8. safe cylindrical lithium-manganese dioxide battery according to claim 6, it is characterized in that: the material of T shape pole, circular cover and the connecting ring of black box can be SUS302, SUS304 or SUS316 stainless steel, also can be metallic nickel or metallic aluminium, described sealed insulation plastics can be polyethylene, polypropylene, polystyrene, polytetrafluoroethylene, plasticity polytetrafluoroethylene, or their mixture.Property material for battery shell can be stainless steel, carbon steel, stainless iron, metallic nickel or metallic aluminium.
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| CN2009101931917A CN101694881B (en) | 2009-10-19 | 2009-10-19 | Safe cylindrical lithium-manganese dioxide battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101931917A CN101694881B (en) | 2009-10-19 | 2009-10-19 | Safe cylindrical lithium-manganese dioxide battery |
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| CN101694881A true CN101694881A (en) | 2010-04-14 |
| CN101694881B CN101694881B (en) | 2012-06-27 |
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