CN103730625B - Lithium ion battery with high-rate discharge ability - Google Patents
Lithium ion battery with high-rate discharge ability Download PDFInfo
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- CN103730625B CN103730625B CN201310750564.2A CN201310750564A CN103730625B CN 103730625 B CN103730625 B CN 103730625B CN 201310750564 A CN201310750564 A CN 201310750564A CN 103730625 B CN103730625 B CN 103730625B
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 23
- 238000003475 lamination Methods 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims abstract description 9
- 238000003860 storage Methods 0.000 claims abstract description 9
- 238000004804 winding Methods 0.000 claims abstract description 7
- 230000004888 barrier function Effects 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 11
- 239000010949 copper Substances 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 125000006850 spacer group Chemical group 0.000 claims description 7
- 239000004411 aluminium Substances 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 238000004080 punching Methods 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 5
- 229910001369 Brass Inorganic materials 0.000 claims description 4
- 239000010951 brass Substances 0.000 claims description 4
- 239000013536 elastomeric material Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 230000004308 accommodation Effects 0.000 claims 1
- 238000005452 bending Methods 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 claims 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims 1
- 239000010937 tungsten Substances 0.000 claims 1
- 229910052721 tungsten Inorganic materials 0.000 claims 1
- 230000005611 electricity Effects 0.000 abstract description 11
- 230000009194 climbing Effects 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 9
- 238000003466 welding Methods 0.000 description 8
- 239000004744 fabric Substances 0.000 description 7
- 239000002033 PVDF binder Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 6
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000011888 foil Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- -1 polytetrafluoroethylene Polymers 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 3
- 239000005030 aluminium foil Substances 0.000 description 3
- 239000011889 copper foil Substances 0.000 description 3
- 210000005069 ears Anatomy 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002931 mesocarbon microbead Substances 0.000 description 2
- 230000005405 multipole Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000002459 sustained effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000006245 Carbon black Super-P Substances 0.000 description 1
- 229910010707 LiFePO 4 Inorganic materials 0.000 description 1
- 229910052493 LiFePO4 Inorganic materials 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000002134 carbon nanofiber Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
-
- 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
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses a kind of lithium ion battery with high-rate discharge ability, battery core, upper cover plate and lower cover including shell, in shell, battery core is made up of the anode pole piece with positive pole ear, the cathode pole piece with negative lug and barrier film of the one kind in winding method and lamination process, it is characterised in that:It is additionally provided with positive pole ear clamp system and negative lug clamp system, positive pole ear clamp system inner side is fixed in positive pole ear storage, positive pole ear clamp system outside is provided with positive pole stud, positive pole stud is detachably connected with upper cover plate, negative lug clamp system inner side is fixed in negative lug storage, negative lug clamp system outside is provided with negative pole stud, and negative pole stud is detachably connected with lower cover.Rubbed the present invention is especially suitable for electricity, the field such as electric taxi and electric bus, meet the requirement to battery high-rate discharge ability under the harsh conditions such as vehicle started in climbing, moment, wink accelerates.
Description
Technical field
The present invention relates to a kind of lithium ion battery, a kind of lithium-ion electric with high-rate discharge ability is specifically related to
Pond.
Background technology
In the last few years, with the popularization and extensive use of various portable type electronic products, as the driving electricity of these products
Source, lithium ion battery has the small good characteristic of low self-discharge rate, good cycle, self discharge, is rapidly developed and answered
With.Particularly this time 18 hold greatly, by " Green Development " and " beautiful China " write-in report, recycling economy hair is promoted energetically
Exhibition, positive Advocate Ecological Civilization builds resource-conserving and environmentally friendly society.
Lithium rechargeable battery has pollution-free, zero-emission, can be recycled and be just gradually applied to orthodox car manufacturing industry,
Such as motorcycle, taxi, bus field, but in the place, vehicle such as remote mountain areas, road conditions are poor and urban signal is more
When climbing, moment start, accelerate in wink, the performance that sparks, lasting high-rate discharge ability to battery are proposed
New challenge, discloses the lithium ion battery of some high-multiplying-power discharge performances and high power capacity, to a certain extent in the prior art
Improve the multiplying power discharging property of lithium ion battery, reduce certain internal resistance, but there is a problem in that：
（1）Electrode slice is generally designed using two or more multi pole ears, or the electrode designed by lamination process
Piece peripheral hardware metal foil is punched as lug, and manufacturing process is complex, while the wear rate of mould also increases simultaneously；
（2）Rosin joint or not prison welding cause the internal resistance of battery to be unable to reach the demand of product, can only degrade and use or scrap；
（3）Increase both positive and negative polarity lug exit is taken, the multiplying power discharging property of battery is improved, but it is bad in road conditions,
Frequent starting in rugged hill path or urban transportation, accelerate in the case of, it is necessary to battery meets the performance requirement of bigger multiplying power discharging,
Now, some multiplying powers do not reach or slightly worse battery ramp will be caused to cast anchor, overcurrent protection, or even bring serious traffic thing
Therefore.
Additionally, in the prior art, generally using winding and the production technology of lamination, the composition of battery core is mainly：Positive plate,
, to wind or the technique of lamination is fabricated to battery core, the positive/negative plate of winding process is coated with using batch (-type), is being stayed for barrier film, negative plate
White place is respectively welded both positive and negative polarity lug；The technique of lamination is also to be coated with using batch (-type), is then cut or mould by blank space
It is punched into the specification of needs, similar to lug（Also referred to as collector）Pattern, by lamination process, be fabricated to battery core, finally will
Metal foil is clamped by ultrasonic bonding or clamping device.
The battery that above two production technology is made by tab welding or lamination process, meets again to a certain extent
The requirement of rate discharge performance, but in high power capacity, powerful battery design, especially electrokinetic cell is applied in city bus, electronic
The fields such as bus, by multi pole ears extraction, multilayer metal foil（Also referred to as collector）The mode that superposition welding is drawn, battery is being trembled
Move, fall, jolt test in, the battery core in battery easily occur play, cause misplace and trigger internal short-circuit of battery, while
Shake, jolt during battery core also easily pull lug, cause lug to tear or the phenomenon broken, cause the generation of short circuit, institute
With, must be prevented effectively from structure design, prevent such potential safety hazard.
The content of the invention
In order to solve the above-mentioned technical problem, the present invention proposes a kind of lithium ion battery with high-rate discharge ability, special
Do not rubbed suitable for electricity, the field such as electric taxi and electric bus, meeting that vehicle started in climbing, moment, wink accelerates etc. dislikes
To the requirement of battery high-rate discharge ability in the case of bad.
The technical proposal of the invention is realized in this way：
A kind of lithium ion battery with high-rate discharge ability, including shell, the battery core in shell, upper cover plate and
Lower cover, the battery core is by the anode pole piece with positive pole ear, the cathode pole piece with negative lug and barrier film by winding
One kind in mode and lamination process is made, it is characterised in that:It is additionally provided with positive pole ear clamp system and negative lug clamping machine
The positive pole ear clamp system inner side is fixed in structure, the positive pole ear storage, on the positive pole ear clamp system outside
Positive pole stud is provided with, the positive pole stud is detachably connected with the upper cover plate, the negative lug storage is fixed on described negative
Pole lug clamp system inner side, the negative lug clamp system outside is provided with negative pole stud, the negative pole stud with it is described
Lower cover is detachably connected.
As a further improvement on the present invention, positive pole extension stud, negative pole extension stud, first fuse and are additionally provided with
Two fuses, the positive pole stud is provided with the first blind hole, the positive pole extension stud court towards described positive pole extension stud one end
The second blind hole is provided with to described positive pole stud one end, and second blind hole connects to form receiving space with first blind hole,
The positive pole stud is detachably connected with the positive pole extension stud, and the first fuse can just be placed in first blind hole
In the receiving space formed with second blind hole, it is blind that the negative pole stud is provided with the 3rd towards described positive pole extension stud one end
Hole, the negative pole extension stud is provided with the 4th blind hole, and the 4th blind hole and the described 3rd towards described negative pole stud one end
Blind hole connects to form receiving space, and the negative pole stud is detachably connected with the negative pole extension stud, the second fuse
Can just be placed in the receiving space that the 3rd blind hole and the 4th blind hole are formed.
As a further improvement on the present invention, the depth of first blind hole and second blind hole is respectively described first
The depth of the 1/2 of fuse length, the 3rd blind hole and the 4th blind hole is respectively the 1/ of the second fuse length
2。
As a further improvement on the present invention, the positive pole ear and the anode pole piece integrated molding, the negative pole
Lug and the cathode pole piece integrated molding.
As a further improvement on the present invention, the positive pole ear is accommodated in the positive pole ear clamp system inner side, and
One kind in being clamped by ultra-sonic welded and punch press punching press is fixed, and the negative lug is accommodated in the negative lug and clamps
Mechanism inner side, and be fixed by the one kind in ultra-sonic welded and punch press punching press clamping.
As a further improvement on the present invention, the structure that the positive pole stud is detachably connected with the upper cover plate is：Institute
Positive pole stud is stated to be connected by nut with the upper cover plate；The structure that the negative pole stud is detachably connected with the lower cover
It is：The negative pole stud is connected with the lower cover by nut.
As a further improvement on the present invention, the structure that the positive pole stud is detachably connected with the positive pole extension stud
It is：The positive pole stud is connected with the positive pole extension stud by insulating nut；The negative pole stud and the negative pole extension
The structure that stud is detachably connected is：The negative pole stud is connected with the negative pole extension stud by insulating nut.
As a further improvement on the present invention, it is between the positive pole stud and the outer extending stud of the positive pole and described negative
Insulation spacer is respectively equipped between pole stud and the outer extending stud of the negative pole.
As a further improvement on the present invention, the material of the insulation spacer be plastics, polytetrafluoroethylene (PTFE), elastomeric material and
One kind in macromolecular material.
As a further improvement on the present invention, the material of the positive pole ear clamp system is in aluminium and aluminium alloy
Kind, the material of the negative lug clamp system is the one kind in brass, red copper, tungsten copper and alloyed copper.
The beneficial effects of the invention are as follows：The present invention provides a kind of lithium ion battery with high-rate discharge ability, and existing
There is technology to compare, it is of the invention by setting positive pole ear clamp system and negative lug clamp system, by positive pole ear and negative pole
Lug respectively be fixed in positive pole ear clamp system and negative lug clamp system completely by storage, can significantly improve battery
Multiplying power discharging property, meanwhile, all retain the lead-out modes of lugs, can increasing heat radiation area, significantly improve radiating effect, it is special
Other, positive pole ear is fixed when being accommodated in positive pole ear clamp system by ultra-sonic welded, and negative lug is accommodated in negative
It is fixed by ultra-sonic welded when in the lug clamp system of pole, using ultrasonic bonding, not only welding effect is good, welding efficiency
Also it is high, and the connected mode of ultra-sonic welded is soft connection, shock-absorbing capacity and high-rate performance are better than other connected modes, this
The structure of sample be particularly suitable for applications in the not good electric bicycle of road conditions, electricity rub, on the vehicles such as electric automobile, in vibration frequency
In the environment of numerous or sustained vibration, can the impulse force that is brought to positive pole ear and negative lug of buffering vibration, be greatly enhanced
The security performance of battery；Positive pole ear and negative lug design can be added by overall technique of drawing in anode pole piece and cathode pole piece
Man-hour own reservation is formed, this way it is not necessary to cut or the processing such as cut, and can use full coat mode for cloth, is applied compared to interval
Cloth technique, full coat cloth technological operation is easier, and price is relatively cheap, and the requirement to coating machine is relatively low, and interval can be avoided to be coated with
During it is light before the conditions of streaking that produces and pole piece surface density after weight phenomenon.
Additionally, the present invention sets positive pole extension stud, negative pole extension stud, first fuse and second fuse, by the
The collecting that the second blind hole that one fuse is placed in the first blind hole on positive pole extension stud and positive pole extension stud is formed is empty
It is interior, second fuse is placed in the collecting that the 4th blind hole on negative pole stud in the 3rd blind hole and negative pole extension stud is formed
In space, so, when electric current exceedes rated current during short circuit or use, electric current passes through first fuse and second to battery
Fuse, melt fuses because of heating in fuse, makes battery not in work, forms short circuit, plays the purpose of protection battery, and
First fuse and second fuse have inverse time delay characteristics, and when overload current hour, fusing time is long；When overload current is big,
Fusing time is short, therefore, recover normal to electric current in the range of certain overload current, first fuse and second fuse will not
Fusing, battery can work on, the change of fuse easy maintenance of above method design, as long as extension stud is unloaded, take
Go out the fuse of damage, change a new same specification fuse, just can task again, and to the electrical property of battery without any
Influence.
Brief description of the drawings
Fig. 1 is decomposition texture schematic diagram of the present invention；
Fig. 2 is takeup type anode pole piece structure chart of the present invention；
Fig. 3 is takeup type cathode pole piece structure chart of the present invention；
Fig. 4 is stacked anode pole piece of the invention and cathode pole piece structural representation.
With reference to accompanying drawing, make the following instructions：
1 --- shell 2 --- upper cover plate
3 --- lower cover 4 --- positive pole ears
5 --- negative lug 6 --- positive pole ear clamp systems
7 --- negative lug clamp system 8 --- positive pole studs
9 --- negative pole stud 10 --- positive pole extension studs
11 --- negative pole extension stud 12 --- first fuses
13 --- second fuse
Specific embodiment
The present invention will be further described below in conjunction with the accompanying drawings.
As shown in figure 1, the present invention be a kind of lithium ion battery with high-rate discharge ability, including shell 1, positioned at outer
Battery core, upper cover plate 2 and lower cover 3 in shell, the battery core is by the anode pole piece with positive pole ear 4, with negative lug 5
Cathode pole piece and barrier film are made up of the one kind in winding method and lamination process, are additionally provided with positive pole ear clamp system 6 and bear
The positive pole ear clamp system inner side, the positive pole ear folder are fixed in pole lug clamp system 7, the positive pole ear storage
Tight mechanism outside is provided with positive pole stud 8, and the positive pole stud is detachably connected with the upper cover plate, the negative lug storage
The negative lug clamp system inner side is fixed on, the negative lug clamp system outside is provided with negative pole stud 9, described negative
Pole stud is detachably connected with the lower cover, and so, positive pole ear and negative lug are accommodated in positive pole ear folder completely respectively
In tight mechanism and negative lug clamp system, the multiplying power discharging property of battery can be significantly improved, meanwhile, all retain lug
Lead-out mode, can increasing heat radiation area, significantly improve radiating effect.
Preferably, positive pole extension stud 10, negative pole extension stud 11, first fuse 12 and second fuse are additionally provided with
13, the positive pole stud is provided with the first blind hole towards described positive pole extension stud one end, and the positive pole extension stud is described in
Positive pole stud one end is provided with the second blind hole, and second blind hole connects to form receiving space with first blind hole, it is described just
Pole stud is detachably connected with the positive pole extension stud, and the first fuse can just be placed in first blind hole and described
In the receiving space that second blind hole is formed, the negative pole stud is provided with the 3rd blind hole, institute towards described positive pole extension stud one end
State negative pole extension stud and be provided with the 4th blind hole towards described negative pole stud one end, and the 4th blind hole connects with the 3rd blind hole
Logical to form receiving space, the negative pole stud is detachably connected with the negative pole extension stud, and the second fuse can just be held
It is placed in the receiving space that the 3rd blind hole and the 4th blind hole are formed, so, battery electricity during short circuit or use
When stream exceedes rated current, by first fuse and second fuse, melt fuses electric current because of heating in fuse, makes electricity
Pond forms short circuit not in work, plays the purpose of protection battery, and first fuse and second fuse have the inverse time lag special
Property, when overload current hour, fusing time is long；When overload current is big, fusing time is short, therefore, in certain overload current scope
Interior to recover normal to electric current, first fuse and second fuse will not fuse, and battery can work on, from above-mentioned the
When one fuse and second fuse, can be selected according to the requirement of electric current in the capacity of battery and application process, for example：
The volume meter capacity of a electrokinetic cell is 20Ah, and it is 15C that the field of application needs maximum current needs, you can from maximum electricity
The fuse that 300 amperes of flow valuve, in use, the electric current of above-mentioned fuse is continued above 300 ampere-hours, and fuse can be because of electric current
Overload and in a short time melt melt in fuse, make battery not in work, form short circuit, play the mesh of protection battery
, the fuse of above method design is installed, easy maintenance is changed, as long as extension stud is unloaded, the fuse for damaging is taken out,
Change a new same specification fuse, just can task again, and electrical property to battery has no effect.
Preferably, the depth of first blind hole and second blind hole is respectively the 1/2 of the first fuse length,
The depth of the 3rd blind hole and the 4th blind hole is respectively the 1/2 of the second fuse length.
Preferably, the positive pole ear and the anode pole piece integrated molding, the negative lug and the negative pole pole
Piece integrated molding, can be formed, so, no by overall technique own reservation when anode pole piece and cathode pole piece are processed of drawing
Needs cut or cut etc. processing, during specific implementation, the positive pole of the anode pole piece of takeup type or Laminated Type Lithium Ion Secondary Battery
The negative lug of lug and cathode pole piece is stayed in advance in coating process, and coating process of the invention uses full coat mode for cloth,
Compared to interval coating process, full coat cloth technological operation is easier, and price is relatively cheap, and the requirement to coating machine is relatively low, can keep away
Exempt from light rear heavy phenomenon before the conditions of streaking and pole piece surface density of generation in interval coating process.
Preferably, the positive pole ear is accommodated in the positive pole ear clamp system inner side, and by ultra-sonic welded and punching
One kind during bed punching press is clamped is fixed, and the negative lug is accommodated in the negative lug clamp system inner side, and passes through
One kind during ultra-sonic welded and punch press punching press are clamped is fixed, the above-mentioned preferred ultra-sonic welded of fixed form, using supersonic welding
Connect, not only welding effect is good, and welding efficiency is also high, and the connected mode of ultra-sonic welded is soft connection, shock-absorbing capacity and big electricity
Fluidity can be better than other connected modes, such structure be particularly suitable for applications in the not good electric bicycle of road conditions, electricity rub, electricity
On the vehicles such as electrical automobile, vibration frequently or sustained vibration in the environment of, can buffering vibration to positive pole ear and negative pole
The impulse force that lug is brought, is greatly enhanced the security performance of battery.
Preferably, the structure that the positive pole stud is detachably connected with the upper cover plate is：The positive pole stud with it is described
Upper cover plate is connected by nut；The structure that the negative pole stud is detachably connected with the lower cover is：The negative pole stud with
The lower cover is connected by nut, and particularly, the nut is hex nut, and the material of the hex nut is aluminium, aluminium
One kind in alloy, brass, red copper and stainless steel.
Preferably, the structure that the positive pole stud is detachably connected with the positive pole extension stud is：The positive pole stud
It is connected by insulating nut with the positive pole extension stud；The negative pole stud is detachably connected with the negative pole extension stud
Structure is：The negative pole stud is connected with the negative pole extension stud by insulating nut.Particularly, the insulating nut is exhausted
Edge hex nut, the material of the insulation hex nut is in plastics, polytetrafluoroethylene (PTFE), elastomeric material and macromolecular material
Kind.
Preferably, between the outer extending stud of the positive pole stud and the positive pole and the negative pole stud and the negative pole
Insulation spacer is respectively equipped between outer extending stud.
Preferably, the material of the insulation spacer is in plastics, polytetrafluoroethylene (PTFE), elastomeric material and macromolecular material
Kind.
Preferably, the material of the positive pole ear clamp system is the one kind in aluminium and aluminium alloy, the negative lug folder
The material of tight mechanism is the one kind in brass, red copper, tungsten copper and alloyed copper.
The assembly method of lithium ion battery of the present invention with high-rate discharge ability is as follows：
Referring to figs. 2 and 3, anode pole piece, diaphragm paper, cathode pole piece are put into up- coiler, start up- coiler, it is rolled into electricity
Core, sticks the terminal adhesive tape of electrolyte resistance corrosion, with hand by the positive pole ear of battery core（Also referred to as collector）Clutch, be put into positive pole pole
In ear clamp system, the positive pole ear clamp system that will clamp positive pole ear with ultrasonic wave is welded；With hand by the negative pole of battery core
Lug（Also referred to as collector）Clutch, be put into negative lug clamp system, the positive pole pole of negative lug will have been clamped with ultrasonic wave
Ear clamp system is welded, and forms battery core；
With reference to Fig. 4, anode pole piece, diaphragm paper and cathode pole piece are superimposed by iterative cycles, ultimately form battery core, and battery core is just
The several layers of foil that one end of pole pole piece is exposed form positive pole ear；The several layers of foil that one end of battery core cathode pole piece is exposed form negative
Pole lug.
The battery core formed above by winding or lamination is put into battery case, loads upper cover plate, will with hex nut
Positive pole stud is locked, and first fuse is put into the first blind hole of positive pole stud, and the depth of the first blind hole is first fuse
The 1/2 of length, places the insulation spacer between positive pole stud and positive pole extension stud, then by the second blind hole set of positive pole extension stud
Enter in first fuse, the depth of the second blind hole is the 1/2 of first fuse length, with insulation hex nut by positive pole stud and
Positive pole extension screwing up stud, according to identical assemble method, loads lower cover, is locked negative pole stud and lower cover with hex nut
Tightly, second fuse is put into the 3rd blind hole of negative pole stud, the depth of the 3rd blind hole is the 1/2 of second fuse length, is put
Put the insulation spacer between negative pole stud and negative pole extension stud, then by the 4th blind hole of negative pole extension stud（The depth of the 4th blind hole
Spend is the 1/2 of second fuse length）It is inserted in second fuse, with insulation hex nut by negative pole stud and negative pole extension spiral shell
Post is tightened, and one end of battery case is provided with liquid injection hole, after the completion of battery assembling, electrolyte is injected into battery case from liquid injection hole
Interior, sealing carries out forming and capacity dividing, completes assembling.
The material of the anode pole piece in the present invention is aluminium foil or aluminium net, and its preparation technology is：By PVDF（Kynoar）,
Put into NMP（1-METHYLPYRROLIDONE）In, start mixer, and PVDF is dissolved completely in NMP by certain speed, will
LiFePO 4 material is added in the solution, is sufficiently mixed and is made slurry, consisting of LiFePO4:PVDF：Acetylene black：Super-P
（Super carbon black）=90:4：4：2.The slurry is uniformly coated on 20 μm of aluminium foil in the method for full coat cloth again, in 100 DEG C
Lower drying 6 hours.Dressing size is obtained after roll-in is：1850mm*90mm, the size of aluminium foil is：90mm*25mm, thickness is 150
μm positive plate（Shown in Fig. 4）.
Cathode pole piece material is Copper Foil or copper mesh in the present invention, and its preparation technology is：By PVDF（Kynoar）, input
To in pure water, start beater, and PVDF is dissolved completely in pure water by certain speed, by MCMB（Carbonaceous mesophase spherules）
Add in the solution, be sufficiently mixed and be made slurry, consisting of MCMB：PVDF：VGCF（Nanometer overlength carbon fiber）=95:4：1.
The slurry is uniformly coated on 15 μm of Copper Foil in the method for full coat cloth again, in dry 6 hours at 100 DEG C.After roll-in
It is to dressing size：1900mm*92mm, the size of Copper Foil is：92mm*25mm, thickness is 150 μm of negative plate.
Above example is referring to the drawings, to a preferred embodiment of the present invention will be described in detail.Those skilled in the art
Member by carrying out to above-described embodiment modification or change on various forms, but without departing substantially from essence of the invention in the case of, all
Fall within the scope and spirit of the invention.
Claims (9)
1. a kind of lithium ion battery with high-rate discharge ability, including shell (1), the battery core in shell, upper cover plate
(2) and lower cover (3), the battery core is by the anode pole piece with positive pole ear (4), the cathode pole piece with negative lug (5)
It is made up of the one kind in winding method and lamination process with barrier film, it is characterised in that:It is additionally provided with positive pole ear clamp system (6)
With negative lug clamp system (7), positive pole ear storage is fixed on the positive pole ear clamp system inner side, the positive pole
Lug clamp system outside is provided with positive pole stud (8), and the positive pole stud is detachably connected with the upper cover plate, the negative pole
The negative lug clamp system inner side is fixed in lug storage, and the negative lug clamp system outside is provided with negative pole stud
(9), the negative pole stud is detachably connected with the lower cover；The positive pole ear clamp system, the negative lug are clamped
Mechanism includes egative film, extends the intermediate plate being oppositely arranged to be formed from the egative film both sides bending in the same direction, the positive pole ear, described
Negative lug is accommodated in the accommodation space that its corresponding two intermediate plates and egative film are surrounded, and by ultra-sonic welded and punch press punching press
One kind in clamping is fixed.
2. the lithium ion battery with high-rate discharge ability according to claim 1, it is characterised in that：It is additionally provided with positive pole
Extension stud (10), negative pole extension stud (11), first fuse (12) and second fuse (13), the positive pole stud direction
Described positive pole extension stud one end is provided with the first blind hole, and the positive pole extension stud is provided with second towards described positive pole stud one end
Blind hole, and second blind hole connects to form receiving space with first blind hole, the positive pole stud and the positive pole extension
Stud is detachably connected, and the first fuse can just be placed in the collecting sky that first blind hole and second blind hole are formed
Interior, the negative pole stud is provided with the 3rd blind hole towards described negative pole extension stud one end, and the negative pole extension stud is towards institute
State negative pole stud one end and be provided with the 4th blind hole, and the 4th blind hole connects to form receiving space with the 3rd blind hole, it is described
Negative pole stud is detachably connected with the negative pole extension stud, and the second fuse can just be placed in the 3rd blind hole and institute
State in the receiving space of the 4th blind hole formation.
3. the lithium ion battery with high-rate discharge ability according to claim 2, it is characterised in that：Described first is blind
The depth of hole and second blind hole is respectively the 1/2 of the first fuse length, the 3rd blind hole and described 4th blind
The depth in hole is respectively the 1/2 of the second fuse length.
4. the lithium ion battery with high-rate discharge ability according to claim 1, it is characterised in that：The positive pole pole
Ear and the anode pole piece integrated molding, the negative lug and the cathode pole piece integrated molding.
5. the lithium ion battery with high-rate discharge ability according to claim 1, it is characterised in that：The positive pole spiral shell
The structure that post is detachably connected with the upper cover plate is：The positive pole stud is connected with the upper cover plate by nut；It is described negative
The structure that pole stud is detachably connected with the lower cover is：The negative pole stud is connected with the lower cover by nut.
6. the lithium ion battery with high-rate discharge ability according to claim 2, it is characterised in that：The positive pole spiral shell
The structure that post is detachably connected with the positive pole extension stud is：The positive pole stud is with the positive pole extension stud by insulation
Nut is connected；The structure that the negative pole stud is detachably connected with the negative pole extension stud is：The negative pole stud with it is described
Negative pole extension stud is connected by insulating nut.
7. the lithium ion battery with high-rate discharge ability according to any one of claim 1 to 6, it is characterised in that：
Between the positive pole stud and the outer extending stud of the positive pole and between the negative pole stud and the outer extending stud of the negative pole
It is respectively equipped with insulation spacer.
8. the lithium ion battery with high-rate discharge ability according to claim 7, it is characterised in that：The felt pad
The material of piece is the one kind in plastics, elastomeric material.
9. the lithium ion battery with high-rate discharge ability according to claim 1, it is characterised in that：The positive pole pole
The material of ear clamp system is the one kind in aluminium and aluminium alloy, and the material of the negative lug clamp system is brass, red copper, tungsten
One kind in copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310750564.2A CN103730625B (en) | 2013-12-31 | 2013-12-31 | Lithium ion battery with high-rate discharge ability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310750564.2A CN103730625B (en) | 2013-12-31 | 2013-12-31 | Lithium ion battery with high-rate discharge ability |
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| Publication Number | Publication Date |
|---|---|
| CN103730625A CN103730625A (en) | 2014-04-16 |
| CN103730625B true CN103730625B (en) | 2017-06-30 |
Family
ID=50454620
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310750564.2A Active CN103730625B (en) | 2013-12-31 | 2013-12-31 | Lithium ion battery with high-rate discharge ability |
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Effective date of registration: 20200326 Address after: 246100 No.1, Inner Ring North Road, Huaining Industrial Park, Anqing City, Anhui Province Patentee after: Anhui Jinxin Hongyun New Energy Technology Co., Ltd Address before: Room 27 uff03 1803, yunshuige, sunshine water world phase V, No.33 Taihu Road, Kunshan Development Zone, Suzhou, Jiangsu Patentee before: Zhang Xiaohong |