CN101794914A - Method for manufacturing high-capacity lithium battery with long service life - Google Patents
Method for manufacturing high-capacity lithium battery with long service life Download PDFInfo
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- CN101794914A CN101794914A CN200910115913A CN200910115913A CN101794914A CN 101794914 A CN101794914 A CN 101794914A CN 200910115913 A CN200910115913 A CN 200910115913A CN 200910115913 A CN200910115913 A CN 200910115913A CN 101794914 A CN101794914 A CN 101794914A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- 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
Abstract
The invention relates to a method for manufacturing a high-capacity lithium battery with long service life. The method comprises the following steps: (1) preparation of a positive plate, (2) preparation of a negative plate and (3) battery assembly: rolling the prepared plates into roll cores, welding the tags of the two roll cores together to form an interior-parallel double roll core structure, packing with an aluminum-plastic composite membrane, and carrying out heat-sealing; and (4) electrolyte injection, sealing and forming: injecting 50-55g of low-temperature electrolyte lithium hexafluorophosphate into the sealed battery, sealing the third side of the battery, standing the sealed battery at 45 degrees for 24 hours, and forming. The product of the invention adopts the special material formula and manufacturing technique, has the advantages of high safety, low cost and long service life, and can be used for various high-capacity and high-power facilities including electric bicycles, electric motorcycles, electric automobiles, satellite communication machines, unmanned aircrafts and the like.
Description
Technical field
The present invention relates to chargeable lithium polymer battery and production method.
Background technology
The selection of material system is most important to battery life in the manufacture method of the existing big capacity chargeable lithium polymer battery of having published or having used and the technology.Ferric phosphate lithium cell has lower voltage platform, causes the power output of battery pack lower, adds that the comparatively complicated cost of its processing is higher, is difficult in recent formation large-scale production; Ternary material, lower voltage platform and security feature thereof still embarrass the client to accept.LiMn2O4 voltage platform height, cost is low, but its lower gram specific capacity, shortcomings such as the cycle characteristics difference of high temperature have limited it and have used preferably on electrokinetic cell,
Summary of the invention
The manufacture method that the purpose of this invention is to provide a kind of high-capacity lithium battery of long service life.
The concrete technical scheme that adopts of the present invention comprises the steps:
1, the preparation of anode pole piece: after the raw material mixing by following weight proportion, the preparation anode sizing agent, detailed process is as follows:
LiMn2O4 37.2%-55.8%, nickle cobalt lithium manganate (ternary) 55.8%-37.2%, conductive agent 3.8%-4.2%, binding agent 2.8%-3.2% and account for 55% solvent of above-mentioned solid weight.
To be that to be solvent make anode sizing agent by mediating, stirring for binding agent, N-methyl pyrrolidone (NMP) with polyvinylidene fluoride (PVDF) after the material mixing of above-mentioned weight proportion, be coated in anode sizing agent on the aluminium foil uniformly, by oven dry, roll-in cuts and makes the pole piece that meets the technological requirement size.
2, the preparation of cathode pole piece: after the raw material mixing by following weight proportion, the preparation cathode pole piece, detailed process is as follows:
Graphite 89%-90%, conductive black 4.5%-5.5%, binding agent 5%-6%.With 30% the solvent that accounts for above-mentioned solid weight
Above-mentioned material is to be that to be solvent make cathode size by mediating, stirring for binding agent, N-methyl pyrrolidone (NMP) with polyvinylidene fluoride (PVDF), be coated in cathode size on the Copper Foil uniformly, by oven dry, roll-in cuts and makes the pole piece that meets the technological requirement size.
3, battery assembling: ready-made pole piece is rolled into the volume core by sutomatic winding machine, again two volume core lugs is welded together, form inner two volume cored structures in parallel, seal after packing with aluminum-plastic composite membrane.
4, fluid injection, seal, change into, changing into is battery to be carried out little electric current discharge and recharge once, comes activated batteries: the battery that will seal mouthful injects 50-55g low-temperature electrolyte lithium hexafluorophosphate, the 3rd limit of battery is sealed again.After shelving 24h, battery 45 degree of sealing mouthful change into.
5, detection/combination: the battery after changing into carries out the capacity sorting, and battery is carried out the connection in series-parallel combination by voltage internal resistance, the capacity of certain limit, is assembled into suitable high power battery group.
Product test result of the present invention is as follows:
Test event: multiplying power discharging test
Model: 8045135 rated capacities: 5000mAh
Quantity: 2PCS batch number: NO.1 is that 0.1mm native copper nickel plating lug NO.2 is a 0.15mm native copper nickel plating lug "
Test condition:
Temperature: 25 ± 5 ℃ of (normal temperature) relative humidity: 45%-85%
Instrument and equipment: FULK 179, internal resistance test device, secondary cell electric property detection device.
Method of testing:
1, with the 0.5C constant-current constant-voltage charging, when reaching the charging deboost, electric core terminal voltage changes constant voltage charge into, when being less than or equal to 0.01CmA, charging current stops charging;
2, shelve 5min after, with the current discharge of 5C to final discharging voltage 3.0V/2.75V.
Test result such as following table:
Discharge curve is seen accompanying drawing 2-5
Criterion:
1, the 0.3C discharge capacity is the rated capacity of battery.
2,5C (mA) discharge capacity 〉=90% * nominal capacity (5000mAh).
Result of determination:
By above test result as can be seen, when this batch battery 5C discharges into 3.0V, have the 1PCS capacity defective, discharge into 2.75V, the 2PCS discharge capacity of test is all qualified.
A kind of new material that can take into account the good characteristic of different materials of the present invention, by ternary and modification LiMn2O4 mixing manufacture anode sizing agent according to a certain percentage, with the carbonaceous mesophase spherules is negative pole, low-temperature electrolyte and shallow fill shallow put discharge and recharge the cycle characteristics that standard improves battery.The utilization of this novel system battery can make battery circulate for 1000 weeks, keeps 80% capacity.Significant to motive force of development automobile, also will promote the green energy resource planning that national development is novel greatly.
Product of the present invention has adopted special material formulation and manufacture craft, and high security, low cost and long-life advantage are arranged, and can be used for various big capacity and high-power equipment, comprise electric bicycle, battery-operated motor cycle, electric automobile, satellite communication machine, drone etc.
Description of drawings
Accompanying drawing 2 is one of battery discharge curve chart of the present invention;
Accompanying drawing 3 is two of battery discharge curve chart of the present invention;
Accompanying drawing 4 is three of battery discharge curve chart of the present invention;
Accompanying drawing 5 is four of battery discharge curve chart of the present invention.
Specific embodiment
A kind of manufacture method that promotes the big capacity chargeable lithium polymer battery life-span of the present invention comprises the steps:
1, the preparation of anode pole piece: after the raw material mixing by following weight proportion, the preparation anode sizing agent, detailed process is as follows:
LiMn2O4 48%, nickle cobalt lithium manganate (ternary) 45%, conductive black 3.8%, binding agent 3.2% and account for 55% solvent of above-mentioned solid weight.
To be that to be solvent make anode sizing agent by mediating, stirring for binding agent, N-methyl pyrrolidone (NMP) with polyvinylidene fluoride (PVDF) after the material mixing of above-mentioned weight proportion, be coated in anode sizing agent on the aluminium foil uniformly, by oven dry, roll-in cuts and makes the pole piece that meets the technological requirement size.
2, the preparation of cathode pole piece: after the raw material mixing by following weight proportion, the preparation cathode pole piece, detailed process is as follows:
Graphite 89%, conductive black are as conductive agent 5%, binding agent 6%.With 30% the solvent that accounts for above-mentioned solid weight
Above-mentioned material is to be that to be solvent make cathode size by mediating, stirring for binding agent, N-methyl pyrrolidone (NMP) with polyvinylidene fluoride (PVDF), be coated in cathode size on the Copper Foil uniformly, by oven dry, roll-in cuts and makes the pole piece that meets the technological requirement size.
3, battery assembling: ready-made pole piece is rolled into the volume core by sutomatic winding machine, again two volume core lugs is welded together, form inner two volume cored structures in parallel, seal after packing with the N408 aluminum-plastic composite membrane.
4, fluid injection, seal, change into, changing into is battery to be carried out little electric current discharge and recharge once, comes activated batteries: the battery that will seal mouthful injects 50-55g low-temperature electrolyte lithium hexafluorophosphate, the 3rd limit of battery is sealed again.After shelving 24h, battery 45 degree of sealing mouthful change into.
5, detection/combination: the battery after changing into carries out the capacity sorting, and battery is carried out the connection in series-parallel combination by voltage internal resistance, the capacity of certain limit, is assembled into suitable high power battery group.
This material system of the present invention, promptly positive pole mixed by 5: 5 with nickle cobalt lithium manganate (ternary) with LiMn2O4, and negative pole is selected MCMB for use, use low-temperature superconducting electrolyte, it is big to have solved the LiMn2O4 loop attenuation, and the defective that the ternary voltage platform is low makes battery that high security and long cycle life arranged.
As shown in Figure 1, with pole piece coiling rolling core 1 and the volume core 2 that makes, with stopping adhesive tape two volume cores are wound up, the aluminium strip of volume core 2 is welded respectively with the lug 4 and 5 of rolling up core 1, two lugs are bent, the position of lug 5 just in the centre position of two volume cores, is suitable for sealing of aluminum-plastic composite membrane top margin again, the parallel connection of two volume in-core portions is combined into two volume cored structures, makes cell that high capacity output and lower cost arranged.
With printing N408 aluminum-plastic composite membrane, make the stable of packaging film electrolyte-resistant sealing property, the raising of the landfill sealing property of lug periphery, the raising of internal layer greasy property and cause stamping forming stability etc. effectively to realize.
Battery of the present invention is shallow to be filled shallow standard of putting and be: charging: the 0.5C constant-current constant-voltage charging is to 4.15V, cut-off current 0.02C; Discharge: the 0.5C constant-current discharge is to 3.3V.Circulate by above standard, circulated for 1000 weeks, capacity keeps more than 80%.
The use of product of the present invention or mode.
Cell after making, make high-power output battery pack by series-parallel compound mode, the control of battery pack by charging voltage and discharge voltage reach a kind of shallow fill shallow put discharge and recharge standard, make battery have long cycle life, a Battery pack can satisfy the time that the client uses 7-10.
Claims (1)
1. the manufacture method of the high-capacity lithium battery of a long service life is characterized in that: the concrete technical scheme that adopts of the present invention comprises the steps:
(1), the preparation of anode pole piece: after mixing by the raw material of following weight proportion, the preparation anode sizing agent,
Detailed process is as follows:
LiMn2O4 37.2%-55.8%, nickle cobalt lithium manganate (ternary) 55.8%-37.2%, conductive agent 3.8%-4.2%, binding agent 2.8%-3.2% and account for 55% solvent of above-mentioned solid weight;
To be that to be solvent make anode sizing agent by mediating, stirring for binding agent, N-methyl pyrrolidone (NMP) with polyvinylidene fluoride (PVDF) after the material mixing of above-mentioned weight proportion, be coated in anode sizing agent on the aluminium foil uniformly, by oven dry, roll-in cuts and makes the pole piece that meets the technological requirement size;
(2), the preparation of cathode pole piece: after the raw material mixing by following weight proportion, prepare cathode pole piece, detailed process is as follows:
Graphite 89%-90%, conductive black 4.5%-5.5%, binding agent 5%-6%.With 30% the solvent that accounts for above-mentioned solid weight
Above-mentioned material be with polyvinylidene fluoride (PVDF) be binding agent, N-methyl pyrrolidone (NMP) to be solvent make cathode size by mediating, stirring, cathode size is coated on the Copper Foil uniformly, by oven dry, roll-in cuts and makes pole piece;
(3), battery assembling: ready-made pole piece is rolled into the volume core, again two volume core lugs is welded together, form inner two volume cored structures in parallel, seal after packing with aluminum-plastic composite membrane;
(4), fluid injection, seal, change into, the battery of sealing mouthful is injected 50-55g low-temperature electrolyte lithium hexafluorophosphate, again the 3rd limit of battery is sealed, change into after battery 45 degree of sealing mouthful are shelved 24h;
(5), detect and combination: the battery after changing into carries out the capacity sorting, battery is carried out connection in series-parallel by voltage internal resistance, the capacity of certain limit make up, and is assembled into suitable high power battery group.
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| CN200910115913A CN101794914A (en) | 2009-08-05 | 2009-08-05 | Method for manufacturing high-capacity lithium battery with long service life |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101964428A (en) * | 2010-08-05 | 2011-02-02 | 深圳市贝特瑞新能源材料股份有限公司 | Preparation method of lamellar lithium manganese battery |
| CN102881947A (en) * | 2012-10-11 | 2013-01-16 | 山东天阳新能源有限公司 | Lithium manganese oxide soft package battery and preparation method thereof |
| CN103094556A (en) * | 2013-01-30 | 2013-05-08 | 浙江超威创元实业有限公司 | Method for preparing positive electrode slurry of lithium ion battery |
| CN106058303A (en) * | 2016-07-28 | 2016-10-26 | 广西卓能新能源科技有限公司 | 18650 lithium ion battery and preparation method thereof |
| CN108155424A (en) * | 2017-12-12 | 2018-06-12 | 江苏双登富朗特新能源有限公司 | A kind of control method of novel improvement lithium ion Soft Roll laminated batteries diaphragm fold |
| CN108598598A (en) * | 2018-04-17 | 2018-09-28 | 浙江南都电源动力股份有限公司 | A kind of high-power lithium battery of high specific energy and its manufacturing method |
| CN109286008A (en) * | 2018-09-25 | 2019-01-29 | 惠州亿纬锂能股份有限公司 | A kind of low-temperature lithium ion battery and preparation method thereof |
| CN113851729A (en) * | 2020-06-10 | 2021-12-28 | 合肥国轩高科动力能源有限公司 | Lithium ion storage battery and preparation method thereof |
-
2009
- 2009-08-05 CN CN200910115913A patent/CN101794914A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101964428A (en) * | 2010-08-05 | 2011-02-02 | 深圳市贝特瑞新能源材料股份有限公司 | Preparation method of lamellar lithium manganese battery |
| CN101964428B (en) * | 2010-08-05 | 2013-02-20 | 深圳市贝特瑞新能源材料股份有限公司 | Preparation method of lamellar lithium manganese battery |
| CN102881947A (en) * | 2012-10-11 | 2013-01-16 | 山东天阳新能源有限公司 | Lithium manganese oxide soft package battery and preparation method thereof |
| CN102881947B (en) * | 2012-10-11 | 2015-05-13 | 山东天阳新能源有限公司 | Lithium manganese oxide soft package battery and preparation method thereof |
| CN103094556A (en) * | 2013-01-30 | 2013-05-08 | 浙江超威创元实业有限公司 | Method for preparing positive electrode slurry of lithium ion battery |
| CN106058303A (en) * | 2016-07-28 | 2016-10-26 | 广西卓能新能源科技有限公司 | 18650 lithium ion battery and preparation method thereof |
| CN108155424A (en) * | 2017-12-12 | 2018-06-12 | 江苏双登富朗特新能源有限公司 | A kind of control method of novel improvement lithium ion Soft Roll laminated batteries diaphragm fold |
| CN108598598A (en) * | 2018-04-17 | 2018-09-28 | 浙江南都电源动力股份有限公司 | A kind of high-power lithium battery of high specific energy and its manufacturing method |
| CN109286008A (en) * | 2018-09-25 | 2019-01-29 | 惠州亿纬锂能股份有限公司 | A kind of low-temperature lithium ion battery and preparation method thereof |
| CN113851729A (en) * | 2020-06-10 | 2021-12-28 | 合肥国轩高科动力能源有限公司 | Lithium ion storage battery and preparation method thereof |
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Application publication date: 20100804 |