CN102800893A - Method for producing lithium ion battery of high magnification - Google Patents
Method for producing lithium ion battery of high magnification Download PDFInfo
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- CN102800893A CN102800893A CN2012103047068A CN201210304706A CN102800893A CN 102800893 A CN102800893 A CN 102800893A CN 2012103047068 A CN2012103047068 A CN 2012103047068A CN 201210304706 A CN201210304706 A CN 201210304706A CN 102800893 A CN102800893 A CN 102800893A
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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
Provided is a method for producing lithium ion batteries of high magnification. An electrode slice selected lithium iron phosphate as a cathode material has a double coating surface density of 30-36 mg/cm2 and a compaction density of 1.95-2.05 g/cm3; an electrode slice selected lithium manganate as the cathode material has a double coating surface density of 38-42 mg/cm2 and a compaction density of 2.65-2.75 g/cm3; an electrode slice selected a ternary material as the cathode material has a double coating surface density of 40-46 mg/cm2 and a compaction density of 3.45-3.55 g/cm3; and after the injection of a fluid, the battery is vertically stood for 12-36 h with a bottom surface touching the ground, the battery is stood for 1-5 h respectively with the front, the back, the left side, and the right side of the battery touching the ground, and at last the battery is vertically stood for 1-5 h again with the bottom surface touching the ground. By employing the method, large magnification charge and discharge performances of the lithium ion battery can be realized.
Description
Technical field
The present invention relates to a kind of method of producing high multiplying power lithium ion battery.
Background technology
Lithium ion battery is high because of monomer whose voltage as secondary cell of new generation, energy and power density is big, long-life, light weight are little, memory-less effect, advantage such as pollution-free, has been widely used in the fields such as mobile phone, digital camera, notebook computer of low range discharge.Along with the lithium ion battery applications scope is more and more wider, people are also increasingly high to the requirement of lithium ion battery: the lithium ion battery of high-rate discharge ability all will have vast potential for future development in hybrid vehicle, electric tool, model plane toy and military extraordinary field etc.
In order to realize the high power charging-discharging of lithium ion battery, one side need go up seeking breakthrough at battery material (both positive and negative polarity active material, electrolyte, barrier film etc.), and such as using nano-electrode material to shorten the transmission range of lithium ion, it is active to increase electrochemical reaction; On the other hand; The design of each process links and battery structure in the optimization battery production process; Like publication number is in the patent of CN 202231097U; Disclose a kind of method that between active material and collector, increases one deck conductive adhesive and improved high rate performance, it is that elder generation is coated on the both positive and negative polarity collector through the liquid that the intaglio printing technology will contain the conductive nano charcoal, obtains containing the plus plate current-collecting body and the negative current collector of conductive adhesive after the vacuumize; Through coating machine positive pole and negative electrode active material material are overlying on the both positive and negative polarity collector that contains conductive adhesive respectively again, promptly obtain anodal and the compound pole piece of negative pole.But this method has not only increased production equipment and cost, but also has increased the production process and the time of pole piece.In addition; Publication number be disclose in the patent of CN1945878A a kind of on collector acupuncture perforation or laser drilling (porosity 50%; Aperture 100nm) thus improve the method for high rate performance; But the method might be introduced battery to the edge metal chip that produces in the punching process, causes micro-short circuit.At publication number is in the patent of CN1889293A, and the raising of high rate performance realizes through at least two lugs are set that mainly this method has not only increased the consumption of metal foil on the one hand on positive/negative plate, also increased the production process of pole piece on the other hand.Also have CN102227031A, CN2845189Y, CN1445879A etc. through on pole piece, increasing the patent that lug improves high rate performance similarly.
Summary of the invention
Produce the above-mentioned deficiency of high multiplying power lithium ion battery technology in order to overcome prior art, the present invention provides a kind of method of producing high multiplying power lithium ion battery, can realize the high power charging-discharging of lithium ion battery easily.
The present invention intends the Control and Optimization combination of electrode slice surface density and compacted density from the lithium ion battery production process, and the angle of improving electrode slice and electrolyte infiltration, proposes a kind of method of producing high multiplying power lithium ion battery.Surface density, the compacted density of electrode slice are excessive, though help improving the energy density of lithium ion battery, electrolyte is difficult to be penetrated into pole piece inside, causes the concentration polarization of battery, is unfavorable for the high current charge-discharge of lithium ion battery; Surface density, the compacted density of electrode slice are too small; Though help the infiltration of electrolyte and reduce concentration polarization; But be unfavorable for the reduction of electrode interior contact resistance, can not significantly improve the high rate during charging-discharging of battery, more serious is the energy density that has reduced lithium ion battery.In addition, (Solid Electrolyte Interphase, SEI) film also has material impact to the high rate performance of lithium ion battery mutually in the middle of the solid electrolyte that between electrode material and electrolyte, forms.And the film formed quality of SEI depends on the effect of impregnation may of electrode slice and electrolyte to a great extent, and the effect of impregnation may of therefore improving them also will help the raising of high rate performance.
The technical scheme that the present invention solves its technical problem is: a kind of method of producing high multiplying power lithium ion battery, to selecting the electrode slice of LiFePO4 as positive electrode for use, the double spread surface density is 30 ~ 36 mg/cm
2, compacted density is 1.95 ~ 2.05 g/cm
3
To selecting the electrode slice of LiMn2O4 as positive electrode for use, the double spread surface density is 38 ~ 42 mg/cm
2, compacted density is 2.65 ~ 2.75 g/cm
3
To selecting the electrode slice of ternary material as positive electrode for use, the double spread surface density is 40 ~ 46 mg/cm
2, compacted density is 3.45 ~ 3.55 g/cm
3
After the fluid injection; After the battery bottom surface lands and uprightly leaves standstill 12 ~ 36h; The front of battery, the back side, left surface, right flank land respectively and leave standstill 1 ~ 5h, and last battery bottom surface lands and uprightly leaves standstill 1 ~ 5h, so that each position of electric core can both, fast infiltration abundant by electrolyte.
Beneficial effect of the present invention is: 1. adopt the positive plate surface density of the present invention's proposition and the best of breed of compacted density, can under the prerequisite of not sacrificing energy content of battery density, realize the high rate charge-discharge performance; 2. the positive plate surface density of the present invention's proposition and the best of breed of compacted density are easy to control in process of production and realize having operability flexibly; 3. the scheme that leaves standstill of the present invention not only can make electrolyte fully soak into electrode slice (thereby improving high rate performance), and can improve the production efficiency that leaves standstill link, and this programme need not to use any extra auxiliary device in addition, practices thrift cost.
Description of drawings
Fig. 1 is battery 1C multiplying power discharging property contrast in embodiment 2 and the Comparative Examples 2.
Fig. 2 is battery 3C multiplying power discharging property contrast in embodiment 2 and the Comparative Examples 2.
Fig. 3 is battery 5C multiplying power discharging property contrast in embodiment 2 and the Comparative Examples 2.
Fig. 4 is battery 7C multiplying power discharging property contrast in embodiment 2 and the Comparative Examples 2.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further explain.
Embodiment one:
The employing LiFePO4 is that positive electrode, graphite are that negative material production 80Ah moulds case lithium ion battery.Select the electrode slice of LiFePO4 as positive electrode for use, the double spread surface density is 35mg/cm
2, compacted density is 2 g/cm
3The battery bottom surface lands and uprightly leaves standstill 26h after the fluid injection; Land battery front side then and place 2h; Next also land left side, right side, the back side respectively successively again and place 2h by same mode; Last battery bottom surface lands and uprightly leaves standstill 2h, and total time of repose is 36h, carries out the forming and capacity dividing test then.
Comparative Examples one:
The employing LiFePO4 is that positive electrode, graphite are that negative material production 80Ah moulds case lithium ion battery.Select the electrode slice of LiFePO4 as positive electrode for use, the double spread surface density is 35mg/cm
2, compacted density is 2 g/cm
3Conventional upright placement of battery left standstill 36h (the battery bottom surface lands) after the fluid injection, and the centre is not done and anyly fallen, turning operation.At last, carry out the forming and capacity dividing test.
After adopting embodiment one and Comparative Examples one scheme that battery is left standstill, the contrast of forming and capacity dividing test gained electrochemical data sees the following form.Can see that adopt the battery that embodiment one scheme leaves standstill to compare the battery in the ratio one, the charge-discharge magnification performance is largely improved.
| ? | Initial capacity | The 1C discharge | The 3C discharge | The 5C discharge | The 7C discharge | The 1C charging | The 3C charging |
| Embodiment one | 80.017Ah | 79.673Ah | 78.872Ah | 78.432Ah | 78.217Ah | 75.873Ah | 65.414Ah |
| Comparative Examples one | 80.765Ah | 73.970Ah | 66.700Ah | 66.581Ah | 65.663Ah | 72.554Ah | 61.148Ah |
Discharge-rate C is meant needed current value when battery is emitted its rated capacity in official hour, and it equals the multiple of battery rated capacity on data value, represent with letter C usually.Nominal rating capacity like battery is 10Ah, and then the electric current of 1C discharge-rate is 10A, and the electric current of 3C discharge-rate is 30A, and the electric current of 0.5C discharge-rate is 5A.
Embodiment two:
The employing LiFePO4 is that positive electrode, graphite are that negative material production 80Ah moulds case lithium ion battery.Double spread surface density 33 mg/cm
2, compacted density 2.04 mg/cm
3The battery bottom surface lands and uprightly leaves standstill 26h after the fluid injection; Land battery front side then and place 2h; Next also land left side, right side, the back side respectively successively again and place 2h by same mode; Last battery bottom surface lands and uprightly leaves standstill 2h, and total time of repose is 36h, and the multiplying power discharging property data of gained battery see the following form.
| ? | Initial capacity | The 1C discharge | The 3C discharge | The 5C discharge | The 7C discharge | The 1C charging | The 3C charging |
| Embodiment two | 80.625Ah | 81.129Ah | 79.832Ah | 79.812Ah | 78.9Ah | 78.916Ah | 68.741Ah |
Comparative Examples two:
The employing LiFePO4 is that positive electrode, graphite are that negative material production 80Ah moulds case lithium ion battery.Double spread surface density 38 mg/cm
2, compacted density 2.10 mg/cm
3Leaving standstill behind the battery liquid-filling operated identical with embodiment two, and the multiplying power discharging property data of gained battery see the following form.
| ? | Initial capacity | The 1C discharge | The 3C discharge | The 5C discharge | The 7C discharge | The 1C charging | The 3C charging |
| Comparative Examples two | 80.374Ah | 76.379Ah | 70.667Ah | 70.930Ah | 69.811Ah | 75.152Ah | 63.680Ah |
Can see that from Fig. 1 ~ 4 about the contrast of battery high rate performance embodiment two and the Comparative Examples two 1C, 3C, 5C, the 7C discharge-rate performance of anodal surface density of optimizing among employing the present invention and the compacted density combination battery of producing are all improved significantly.
Embodiment three:
The employing LiFePO4 is that positive electrode, graphite are that negative material production 80Ah moulds case lithium ion battery.Select the electrode slice of LiFePO4 as positive electrode for use, the double spread surface density is 30mg/cm
2, compacted density is 2.05 g/cm
3The battery bottom surface lands and uprightly leaves standstill 20h after the fluid injection, lands battery front side then and places 1h, next also lands left side, right side, the back side respectively by same mode successively again and places 1h, and last battery bottom surface lands and uprightly leaves standstill 1h.
Embodiment four:
The employing LiFePO4 is that positive electrode, graphite are that negative material production 80Ah moulds case lithium ion battery.Select the electrode slice of LiFePO4 as positive electrode for use, the double spread surface density is 32mg/cm
2, compacted density is 1.95g/cm
3The battery bottom surface lands and uprightly leaves standstill 12h after the fluid injection, lands battery front side then and places 3h, next also lands left side, right side, the back side respectively by same mode successively again and places 3h, and last battery bottom surface lands and uprightly leaves standstill 3h.
Embodiment five:
The employing LiFePO4 is that positive electrode, graphite are that negative material production 80Ah moulds case lithium ion battery.Select the electrode slice of LiFePO4 as positive electrode for use, the double spread surface density is 36mg/cm
2, compacted density is 1.97g/cm
3The battery bottom surface lands and uprightly leaves standstill 36h after the fluid injection, lands battery front side then and places 2h, next also lands left side, right side, the back side respectively by same mode successively again and places 2h, and last battery bottom surface lands and uprightly leaves standstill 2h.
Embodiment six:
The employing LiFePO4 is that positive electrode, graphite are that negative material production 80Ah moulds case lithium ion battery.Select the electrode slice of LiFePO4 as positive electrode for use, the double spread surface density is 33mg/cm
2, compacted density is 2.03g/cm
3The battery bottom surface lands and uprightly leaves standstill 32h after the fluid injection, lands battery front side then and places 5h, next also lands left side, right side, the back side respectively by same mode successively again and places 5h, and last battery bottom surface lands and uprightly leaves standstill 5h.
Embodiment seven:
The employing LiFePO4 is that positive electrode, graphite are that negative material production 80Ah moulds case lithium ion battery.Select the electrode slice of LiFePO4 as positive electrode for use, the double spread surface density is 35mg/cm
2, compacted density is 2g/cm
3The battery bottom surface lands and uprightly leaves standstill 23h after the fluid injection, lands battery front side then and places 4h, next also lands left side, right side, the back side respectively by same mode successively again and places 4h, and last battery bottom surface lands and uprightly leaves standstill 4h.
Embodiment eight:
The employing LiMn2O4 is that positive electrode, graphite are that negative material production 80Ah moulds case lithium ion battery.Select the electrode slice of LiFePO4 as positive electrode for use, the double spread surface density is 42mg/cm
2, compacted density is 2.66g/cm
3The battery bottom surface lands and uprightly leaves standstill 12h after the fluid injection, lands battery front side then and places 2h, next also lands left side, right side, the back side respectively by same mode successively again and places 2h, and last battery bottom surface lands and uprightly leaves standstill 2h.
Embodiment nine:
The employing LiMn2O4 is that positive electrode, graphite are that negative material production 80Ah moulds case lithium ion battery.Select the electrode slice of LiFePO4 as positive electrode for use, the double spread surface density is 40mg/cm
2, compacted density is 2.66g/cm
3The battery bottom surface lands and uprightly leaves standstill 36h after the fluid injection, lands battery front side then and places 3h, next also lands left side, right side, the back side respectively by same mode successively again and places 3h, and last battery bottom surface lands and uprightly leaves standstill 3h.
Embodiment ten:
The employing LiMn2O4 is that positive electrode, graphite are that negative material production 80Ah moulds case lithium ion battery.Select the electrode slice of LiFePO4 as positive electrode for use, the double spread surface density is 38mg/cm
2, compacted density is 2.75g/cm
3The battery bottom surface lands and uprightly leaves standstill 15h after the fluid injection, lands battery front side then and places 5h, next also lands left side, right side, the back side respectively by same mode successively again and places 5h, and last battery bottom surface lands and uprightly leaves standstill 5h.
Embodiment 11:
The employing LiMn2O4 is that positive electrode, graphite are that negative material production 80Ah moulds case lithium ion battery.Select the electrode slice of LiFePO4 as positive electrode for use, the double spread surface density is 39mg/cm
2, compacted density is 2.72g/cm
3The battery bottom surface lands and uprightly leaves standstill 25h after the fluid injection, lands battery front side then and places 1h, next also lands left side, right side, the back side respectively by same mode successively again and places 1h, and last battery bottom surface lands and uprightly leaves standstill 1h.
Embodiment 12:
The employing LiMn2O4 is that positive electrode, graphite are that negative material production 80Ah moulds case lithium ion battery.Select the electrode slice of LiFePO4 as positive electrode for use, the double spread surface density is 41mg/cm
2, compacted density is 2.68g/cm
3The battery bottom surface lands and uprightly leaves standstill 30h after the fluid injection, lands battery front side then and places 4h, next also lands left side, right side, the back side respectively by same mode successively again and places 4h, and last battery bottom surface lands and uprightly leaves standstill 4h.
Embodiment 13:
The employing ternary material is that positive electrode, graphite are that negative material production 80Ah moulds case lithium ion battery.Select the electrode slice of LiFePO4 as positive electrode for use, the double spread surface density is 40mg/cm
2, compacted density is 3.46g/cm
3The battery bottom surface lands and uprightly leaves standstill 12h after the fluid injection, lands battery front side then and places 1h, next also lands left side, right side, the back side respectively by same mode successively again and places 1h, and last battery bottom surface lands and uprightly leaves standstill 1h.
Embodiment 14:
The employing ternary material is that positive electrode, graphite are that negative material production 80Ah moulds case lithium ion battery.Select the electrode slice of LiFePO4 as positive electrode for use, the double spread surface density is 46mg/cm
2, compacted density is 3.55g/cm
3The battery bottom surface lands and uprightly leaves standstill 36h after the fluid injection, lands battery front side then and places 2h, next also lands left side, right side, the back side respectively by same mode successively again and places 2h, and last battery bottom surface lands and uprightly leaves standstill 2h.
Embodiment 15:
The employing ternary material is that positive electrode, graphite are that negative material production 80Ah moulds case lithium ion battery.Select the electrode slice of LiFePO4 as positive electrode for use, the double spread surface density is 42mg/cm
2, compacted density is 3.45g/cm
3The battery bottom surface lands and uprightly leaves standstill 16h after the fluid injection, lands battery front side then and places 3h, next also lands left side, right side, the back side respectively by same mode successively again and places 3h, and last battery bottom surface lands and uprightly leaves standstill 3h.
Embodiment 16
The employing ternary material is that positive electrode, graphite are that negative material production 80Ah moulds case lithium ion battery.Select the electrode slice of LiFePO4 as positive electrode for use, the double spread surface density is 43mg/cm
2, compacted density is 3.53g/cm
3The battery bottom surface lands and uprightly leaves standstill 27h after the fluid injection, lands battery front side then and places 4h, next also lands left side, right side, the back side respectively by same mode successively again and places 4h, and last battery bottom surface lands and uprightly leaves standstill 4h.
Embodiment 17:
The employing ternary material is that positive electrode, graphite are that negative material production 80Ah moulds case lithium ion battery.Select the electrode slice of LiFePO4 as positive electrode for use, the double spread surface density is 45mg/cm
2, compacted density is 3.48g/cm
3The battery bottom surface lands and uprightly leaves standstill 33h after the fluid injection, lands battery front side then and places 5h, next also lands left side, right side, the back side respectively by same mode successively again and places 5h, and last battery bottom surface lands and uprightly leaves standstill 5h.
Claims (1)
1. method of producing high multiplying power lithium ion battery is characterized in that:
To selecting the electrode slice of LiFePO4 as positive electrode for use, the double spread surface density is 30 ~ 36 mg/cm
2, compacted density is 1.95 ~ 2.05 g/cm
3
To selecting the electrode slice of LiMn2O4 as positive electrode for use, the double spread surface density is 38 ~ 42 mg/cm
2, compacted density is 2.65 ~ 2.75 g/cm
3
To selecting the electrode slice of ternary material as positive electrode for use, the double spread surface density is 40 ~ 46 mg/cm
2, compacted density is 3.45 ~ 3.55 g/cm
3
After the fluid injection, after the battery bottom surface landed and uprightly leaves standstill 12 ~ 36h, the front of battery, the back side, left surface, right flank landed respectively and leave standstill 1 ~ 5h, and last battery bottom surface lands and uprightly leaves standstill 1 ~ 5h.
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| CN2012103047068A CN102800893A (en) | 2012-08-25 | 2012-08-25 | Method for producing lithium ion battery of high magnification |
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| CN2012103047068A CN102800893A (en) | 2012-08-25 | 2012-08-25 | Method for producing lithium ion battery of high magnification |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108709825A (en) * | 2018-04-24 | 2018-10-26 | 合肥国轩高科动力能源有限公司 | A kind of test method of the optimal compacted density of lithium battery graphite cathode piece |
| CN109687036A (en) * | 2018-12-26 | 2019-04-26 | 深圳市卓能新能源股份有限公司 | Lithium battery manufacturing process |
| CN112768777A (en) * | 2020-12-28 | 2021-05-07 | 蜂巢能源科技有限公司 | Battery interface improving method and battery interface improving system |
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| CN201966294U (en) * | 2010-12-28 | 2011-09-07 | 齐秉春 | Battery standing machine |
| CN102610852A (en) * | 2011-07-29 | 2012-07-25 | 深圳市中星动力电池技术有限公司 | Polymer nickel cobalt manganese vanadium lithium power battery and preparation method thereof |
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| US20070184352A1 (en) * | 2006-02-09 | 2007-08-09 | Sanyo Electric Co., Ltd. | Non-aqueous electrolyte secondary battery |
| CN101499530B (en) * | 2009-03-04 | 2011-05-04 | 深圳市崧鼎实业有限公司 | Multi-multiplying power charging-discharging lithium ion battery and method for producing the same |
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| CN109687036A (en) * | 2018-12-26 | 2019-04-26 | 深圳市卓能新能源股份有限公司 | Lithium battery manufacturing process |
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| CN112768777B (en) * | 2020-12-28 | 2022-03-22 | 蜂巢能源科技有限公司 | Battery interface improving method and battery interface improving system |
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Application publication date: 20121128 |