CN102332542A - High-capacity high-power flexible package lithium ion power battery and preparation method thereof - Google Patents
High-capacity high-power flexible package lithium ion power battery and preparation method thereof Download PDFInfo
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- CN102332542A CN102332542A CN201110215991A CN201110215991A CN102332542A CN 102332542 A CN102332542 A CN 102332542A CN 201110215991 A CN201110215991 A CN 201110215991A CN 201110215991 A CN201110215991 A CN 201110215991A CN 102332542 A CN102332542 A CN 102332542A
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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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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract
The invention discloses a high-capacity high-power flexible package lithium ion power battery and a preparation method thereof. In the lithium ion power battery, a cathode material consists of 85 to 95 mass percent of lithium manganate, 1 to 10 mass percent of binding agent and 3 to 10 mass percent of conductive agent; and an anode material consists of 85 to 95 mass percent of lithium titanate, 1 to 10 mass percent of binding agent and 2 to 10 mass percent of conductive agent. The lithium ion power battery is high in safety performance, large in capacity, high in multiplying performance, long in cycle life, low in manufacturing cost, and more applicable for fields of hybrid electric vehicles, quick-charging extended range pure electric public transportation systems, large-size energy storage systems, household energy storage power stations, military items requiring high performance and the like.
Description
Technical field
The present invention relates to the lithium-ion-power cell field, particularly relate to a kind of large-capacity high-power soft package lithium ion power battery and preparation method thereof.
Background technology
Lithium titanate anode material is a kind of novel ion secondary battery cathode material lithium.Embed or deviate from the process at lithium ion; Crystal formation does not change, and therefore change in volume is called as " zero strain material " less than 1%; Thereby can avoid in the charge and discharge cycles owing to the flexible back and forth of electrode material causes structural damage, the cycle performance and the useful life of improving electrode.Under 25 ℃, Li
4Ti
5O
12The chemical diffusion coefficient be 2 * 10
-8Cm
2/ s, far above carbon negative pole material, high diffusion coefficient makes that this negative material can fast charging and discharging.The lithium titanate material electromotive force is difficult for producing the lithium dendrite arm than the height of pure metal lithium, for the safety that ensures lithium battery provides the foundation, is considered to thoroughly to solve the fail safe of lithium battery.
The relative current potential of LiMn2O4 is higher, good cycle, and gram volume is high, is one of desirable positive electrode.The deformation of shuttling back and forth in the process of lithium manganate material spinel structure, lithium ion is less, and security performance is better.
Lithium-ion battery shell has box hat, aluminum hull, moulds shell, liquid flexible packing.Box hat, aluminum hull, mould the housing that shell all is to use the Mold Making moulding, size is fixed, and changes very difficulty of model.Box hat, aluminum hull burst pressure are bigger, so the security performance of battery is under suspicion.Aluminum plastic film is a kind of three layers of composite membrane, and the innermost layer is PP, and the centre is an aluminium lamination, and outermost layer is a nylon.Size, big I change according to battery request.In addition because the aluminum plastic film shell is comparatively soft, and burst pressure is little, battery security incident such as can not blast.
Tradition uses the lithium ion battery of aluminum plastic film to be the carbon negative pole material battery; Carbon negative pole material since the existence of SEI and formation meeting change into and later process in produce a large amount of gas; Handle bad battery bulging can take place, influence the cycle life and other battery performance of battery.
Summary of the invention
The objective of the invention is: the deficiency to prior art provides a kind of novel lithium-ion-power cell that capacity is big, power is high and fail safe is good.
The technical scheme that the present invention taked is:
The lithium-ion-power cell that the present invention relates to; Its positive electrode is by the LiMn2O4 of 85～95 mass parts; The conductive agent of the adhesive of 1～10 mass parts and 3～10 mass parts is formed; Its negative material is by the lithium titanate of 85～95 mass parts, and the conductive agent of the adhesive of 1～10 mass parts and 2～10 mass parts is formed.
In the method for the invention, conductive agent is the one or more combination thing of SP, superconduction carbon black, electrically conductive graphite, CNT.
In the method for the invention, adhesive is the PVDF of molecular weight ranges between 30 ~ 1,500,000.
The preparation method of lithium-ion-power cell of the present invention may further comprise the steps:
1) press formula ratio preparation positive electrode, PVDF stirs as solvent, gets anode sizing agent behind elimination bubble, the iron filings, presses formula ratio preparation negative material, adds the NMP dissolving, stirs, and gets cathode size behind elimination bubble, the iron filings;
2) respectively the positive and negative electrode slurry is coated on the aluminium foil equably, the coated utmost point twists under the vacuum environment, and 60 ~ 120 ℃ of bakings roll-in, cut into positive and negative plate after 3 ~ 12 hours, and positive and negative plate is through the control test, oven dry moisture;
3) respectively with positive and negative plate under vacuum environment, 60 ~ 120 ℃ the baking 12 ~ 36 hours after, with the electric core of the range upon range of together one-tenth of positive plate, barrier film, negative plate, insert in the aluminum plastic film housing, become the semi-finished product battery;
4) with the semi-finished product battery under vacuum environment, 60 ~ 90 ℃ the baking 36 ~ 96 hours after, fluid injection, change into, partial volume, obtain a kind of lithium-ion-power cell.
Preferably, in the method for the invention, the vacuum degree of vacuum environment is-0.08 ~-0.10 MPa.
Lithium-ion-power cell of the present invention comprises positive pole, negative pole, barrier film, electrolyte, encapsulating housing; Use aluminum plastic film as encapsulating housing; Electrolyte adopts the high temperature modification electrolyte can suppress LiMn2O4 John-Tell effect, and utmost point volume, pole piece, electric core all pass through science, strict baking, the lithium-ion-power cell list according to the present invention ceiling voltage 2.6 ~ 3.0V that only charges; The discharge minimum voltage is 1.0 ~ 2.3V, capacity＞20AH.
The invention has the beneficial effects as follows: select the higher lithium manganate material of current potential as positive pole, improved the operating voltage of battery, thereby improved the battery specific energy.Security of lithium-ion-power cell of the present invention can be good, and this battery safety is high, and capacity is big, and good rate capability has extended cycle life, low cost of manufacture.
Description of drawings
Fig. 1 is that the multiplying power of lithium-ion-power cell of the present invention charges and discharge curve;
Fig. 2 is the 2c discharge curve of lithium-ion-power cell of the present invention;
Fig. 3 is the 1c charging curve of lithium-ion-power cell of the present invention;
Fig. 4 is the 1c discharge curve of lithium-ion-power cell of the present invention;
Fig. 5 is the 1c charging curve of lithium-ion-power cell of the present invention;
Fig. 6 is the 1c discharge curve of lithium-ion-power cell of the present invention.
Embodiment
Below in conjunction with embodiment the present invention is further described, but is not limited thereto.
Embodiment 1
A kind of lithium-ion-power cell comprises positive pole, negative pole, barrier film, electrolyte and shell.
Positive electrode is formed: the PVDF of the LiMn2O4 of 85 mass parts, 5 mass parts, the SP of 10 mass parts;
Negative material is formed: the PVDF of the lithium titanate of 85 mass parts, 5 mass parts, the SP and the KS6 of 10 mass parts;
Barrier film is: the single-layer septum of PP material;
Electrolyte is: 1.2mol/L LiPF
6Solution, solvent composition are EC:DMC:EMC=1:1:1;
Shell is the aluminum plastic film housing.
Concrete preparation method is following:
1) presses formula ratio preparation positive electrode; PVDF is as solvent, and is even through duplicate rows star power mixer high-speed stirred, gets anode sizing agent behind elimination bubble, the iron filings; Press formula ratio preparation negative material; Add the NMP dissolving, even through duplicate rows star power mixer high-speed stirred, get cathode size behind elimination bubble, the iron filings;
2) equably coat aluminium foil on through automatical feeding system and coating machine the positive and negative electrode slurry respectively; The coated utmost point twists under the vacuum environment, and 110 ℃ of bakings roll-in, cut into positive and negative plate after 6 hours; Positive and negative plate is dried moisture through the control test;
3) respectively positive and negative plate with the electric core of the range upon range of together one-tenth of positive plate, barrier film, negative plate, is inserted in the aluminum plastic film housing after 36 hours in 100 ℃ of bakings under the-0.09Mpa, become the semi-finished product battery;
4) with the semi-finished product battery in 80 ℃ of bakings under the-0.08Mpa after 72 hours, fluid injection, change into, partial volume becomes the 50Ah battery.
Battery rate charge-discharge curve, 2c discharge curve such as Fig. 1, shown in Figure 2.
A kind of lithium-ion-power cell comprises positive pole, negative pole, barrier film, electrolyte and shell.
Positive electrode is formed: the PVDF of the LiMn2O4 of 85 mass parts, 5 mass parts, the SP of 10 mass parts;
Negative material is formed: the PVDF of the lithium titanate of 85 mass parts, 5 mass parts, the KS6 of 10 mass parts;
Barrier film is: the single-layer septum of PP material;
Electrolyte is: 1.2mol/L LiPF
6Solution, solvent composition are EC:DMC:EMC=1:1:1;
Shell is the aluminum plastic film housing.
Concrete preparation method is following:
1) press formula ratio preparation positive electrode, PVDF is as solvent, and is even through duplicate rows star power mixer high-speed stirred; Get anode sizing agent after eliminating bubble, iron filings; Press formula ratio preparation negative material, PVDF adds the NMP dissolving as adhesive; Even through duplicate rows star power mixer high-speed stirred, get cathode size behind elimination bubble, the iron filings;
2) equably coat aluminium foil on through automatical feeding system and coating machine the positive and negative electrode slurry respectively; The coated utmost point twists under the vacuum environment, and 110 ℃ of bakings roll-in, cut into positive and negative plate after 6 hours; Positive and negative plate is dried moisture through the control test;
3) respectively with positive and negative plate under-0.10Mpa, 80 ℃ of bakings with the electric core of the range upon range of together one-tenth of positive plate, barrier film, negative plate, were inserted in the aluminum plastic film housing after 24 hours, became the semi-finished product battery;
4) with the semi-finished product battery in 60 ℃ of bakings under the-0.09Mpa after 48 hours, fluid injection, change into, partial volume becomes the 140Ah battery.
Battery charge and discharge curve such as Fig. 3, shown in Figure 4.
Embodiment 3
A kind of lithium-ion-power cell comprises positive pole, negative pole, barrier film, electrolyte and shell.
Positive electrode is formed: the PVDF of the LiMn2O4 of 85 mass parts, 5 mass parts, the SP of 10 mass parts;
Negative material is formed: the PVDF of the lithium titanate of 85 mass parts, 5 mass parts, the superconduction carbon black of 10 mass parts;
Barrier film is: the single-layer septum of PP material;
Electrolyte is: 1.2mol/L LiPF
6Solution, solvent composition are EC:DMC:EMC=1:1:1;
Shell is the aluminum plastic film housing.
Concrete preparation method is following:
1) presses formula ratio preparation positive electrode; PVDF is as solvent, and is even through duplicate rows star power mixer high-speed stirred, gets anode sizing agent behind elimination bubble, the iron filings; Press formula ratio preparation negative material; Add the NMP dissolving, even through duplicate rows star power mixer high-speed stirred, get cathode size behind elimination bubble, the iron filings;
2) equably coat aluminium foil on through automatical feeding system and coating machine the positive and negative electrode slurry respectively; The coated utmost point twists under the vacuum environment, and 110 ℃ of bakings roll-in, cut into positive and negative plate after 6 hours; Positive and negative plate is dried moisture through the control test;
3) respectively with positive and negative plate under-0.08Mpa, 80 ℃ of bakings with the electric core of the range upon range of together one-tenth of positive plate, barrier film, negative plate, were inserted in the aluminum plastic film housing after 36 hours, became the semi-finished product battery;
4) with the semi-finished product battery in 80 ℃ of bakings under the-0.09Mpa after 64 hours, fluid injection, change into, partial volume becomes the 140Ah battery.
Battery charge and discharge curve such as Fig. 5, shown in Figure 6.
Claims (5)
1. lithium-ion-power cell; Its positive electrode is by the LiMn2O4 of 85～95 mass parts; The conductive agent of the adhesive of 1～10 mass parts and 3～10 mass parts is formed, and its negative material is by the lithium titanate of 85～95 mass parts, and the conductive agent of the adhesive of 1～10 mass parts and 2～10 mass parts is formed.
2. a kind of lithium-ion-power cell according to claim 1 is characterized in that said conductive agent is the one or more combination thing of SP, superconduction carbon black, electrically conductive graphite, CNT.
3. a kind of lithium-ion-power cell according to claim 1 is characterized in that said adhesive is the PVDF of molecular weight ranges between 30 ~ 1,500,000.
4. the preparation method of a lithium-ion-power cell is characterized in that may further comprise the steps:
1) press formula ratio preparation positive electrode, PVDF stirs as solvent, gets anode sizing agent behind elimination bubble, the iron filings, presses formula ratio preparation negative material, adds the NMP dissolving, stirs, and gets cathode size behind elimination bubble, the iron filings;
2) respectively the positive and negative electrode slurry is coated on the aluminium foil equably, the coated utmost point twists under the vacuum environment, and 60 ~ 120 ℃ of bakings roll-in, cut into positive and negative plate after 3 ~ 12 hours, and positive and negative plate is through the control test, oven dry moisture;
3) respectively with positive and negative plate under vacuum environment, 60 ~ 120 ℃ the baking 12 ~ 36 hours after, with the electric core of the range upon range of together one-tenth of positive plate, barrier film, negative plate, insert in the aluminum plastic film housing, become the semi-finished product battery;
4) with the semi-finished product battery under vacuum environment, 60 ~ 90 ℃ the baking 36 ~ 96 hours after, fluid injection, change into, partial volume, obtain a kind of lithium-ion-power cell.
5. according to the preparation method of the said a kind of lithium-ion-power cell of claim 4, it is characterized in that: the vacuum degree of said vacuum environment is-0.08 ~-0.10 MPa.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450479A (en) * | 2016-12-01 | 2017-02-22 | 佛山市实达科技有限公司 | Flexible lithium ion battery and making method thereof |
| CN106784996A (en) * | 2017-01-16 | 2017-05-31 | 安徽益佳通电池有限公司 | A kind of high power density lithium ion battery |
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| CN101262078A (en) * | 2008-04-14 | 2008-09-10 | 天津巴莫科技股份有限公司 | Quickly chargeable lithium ion battery and its making method |
| CN101409369A (en) * | 2008-11-14 | 2009-04-15 | 东莞市迈科科技有限公司 | Large-capacity high power polymer ferric lithium phosphate power cell and preparation method thereof |
| 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 |
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- 2011-07-30 CN CN201110215991A patent/CN102332542A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101262078A (en) * | 2008-04-14 | 2008-09-10 | 天津巴莫科技股份有限公司 | Quickly chargeable lithium ion battery and its making method |
| CN101409369A (en) * | 2008-11-14 | 2009-04-15 | 东莞市迈科科技有限公司 | Large-capacity high power polymer ferric lithium phosphate power cell and preparation method thereof |
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450479A (en) * | 2016-12-01 | 2017-02-22 | 佛山市实达科技有限公司 | Flexible lithium ion battery and making method thereof |
| CN106784996A (en) * | 2017-01-16 | 2017-05-31 | 安徽益佳通电池有限公司 | A kind of high power density lithium ion battery |
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Owner name: ZHUHAI LITHIUM NEW ENERGY TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: ZHUHAI LIYUAN POWER TECHNOLOGY CO., LTD. Effective date: 20120112 |
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Effective date of registration: 20120112 Address after: 519000 Guangdong Province, Zhuhai city Xiangzhou District Jida Waterfront Road No. 47 room 1206 Applicant after: Zhuhai Liyuan New Energy Technology Co., Ltd. Address before: 519015 Guangdong province Zhuhai Jida Waterfront Road No. 47 Everbright 1205 Applicant before: Zhuhai Liyuan Power Technology Co., Ltd. |
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Application publication date: 20120125 |