CN105161767A - Lithium ion power battery and fabrication method and application thereof - Google Patents
Lithium ion power battery and fabrication method and application thereof Download PDFInfo
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- CN105161767A CN105161767A CN201510477642.5A CN201510477642A CN105161767A CN 105161767 A CN105161767 A CN 105161767A CN 201510477642 A CN201510477642 A CN 201510477642A CN 105161767 A CN105161767 A CN 105161767A
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- 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
- H01M10/058—Construction or manufacture
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
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- 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
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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
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Abstract
The invention relates to the field of a power battery of an electric vehicle, and discloses a lithium ion power battery, a fabrication method thereof and application thereof serving as the lithium ion power battery of the electric vehicle. The fabrication method of the lithium ion power battery comprises the following steps of: respectively carrying out ultrasonic filtering treatment on a positive electrode slurry and a negative electrode slurry; and fabricating the battery from a material obtained through ultrasonic filtering treatment. By the method disclosed by the invention, the energy density, the capacity and the cycle performance of the battery can be effectively improved, so that the battery still has favorable comprehensive performance in a high-current formation state, and the fabrication cost of the battery can be reduced. In the battery fabricated according to the method, the energy density is higher than 150Wh/kg, the cycle life is more than 500 times, and the capacity retention rate of the battery in the 500th cycles at 23 DEGC and 1C<5>A is still higher than 85%; and moreover, an acupuncture test can be passed, and safety and reliability are achieved.
Description
Technical field
The present invention relates to electric automobile power battery field, particularly, relate to a kind of lithium-ion-power cell and manufacture method thereof and application.
Background technology
Current new-energy automobile industry is on the node of new industry, and who can take turns in industry transformation at this and seize commanding elevation, obtain leading position, and who will become the pilotage people of New World economy.The problem of new-energy automobile industry most critical is that battery price is high, energy is low, once address this problem, the United Nations's International Energy Agency is thought: " its Life cycle cost is expected to lower than fuel vehicle, hybrid power and plug-in hybrid." be that the problem country solving battery price too high has put into effect relevant subsidy policy, but this is makeshift, and can the cost relation how fundamentally reducing electrokinetic cell true development to ev industry.Based on the importance of electrokinetic cell cost, effective technical scheme and line of products are being sought always by the relevant enterprise of electrokinetic cell industrial field and research institution.
The cost of electrokinetic cell is formed primarily of material cost and manufacturing cost, and in reduction battery material cost, battery is switched to LiMn2O4, LiFePO 4 material from more expensive cobalt acid lithium material, and the cost of raw material is minimized.Due to the stationarity of material cost, manufacturing cost height has influence on the height of electrokinetic cell cost largely, and how finding effective electrokinetic cell manufacture method, can either to improve the manufacturing cost that battery performance can reduce again battery be the task of top priority.Lithium-ion-power cell manufacturing process is complicated, and the manufacturing cycle is long.When manufacturing lithium-ion-power cell, can also carry out changing into process after completing sealing, object is to make lithium-ion-power cell can form uniform passivating film (SEI film), reduces its dissolution rate in the electrolytic solution, improves the cycle life of lithium-ion-power cell.Traditional theory thinks that will form SEI film just must take less electric current to change in the incipient stage, and general forming current is less than 0.3C
5a (adopting big current to change into the capacity the cycle life shortening battery that can reduce battery), this manufacture method adds manufacturing time, equipment and energy consumption, also increases battery cost.For this reason, the production time reducing battery by improving electric current is all being inquired into by the research institution of lithium-ion-power cell industrial field and manufacturer, reduces the method for the cost of battery.Publication number be CN101308943A application discloses a kind of chemical synthesizing method that can reduce lithium ion battery manufacturing cost, and specifically disclose its lithium ionic cell formation processing method and comprise the following steps: (1) first carries out the charging of stepped-up voltage formula to lithium ion battery; (2) again big current constant current charge is carried out to lithium ion battery; (3) then the charging of stepped-up voltage formula is carried out to lithium ion battery; (4) finally again lithium ion battery is carried out stage by stage, staged electric discharge or conventional constant-current discharge.Above-mentioned steps is carried out under-20 ~ 45 DEG C of environment.But this chemical synthesizing method adopts multistep charging, and complex procedures, even if cost decreases, has little effect.
Summary of the invention
The object of the invention is to overcome in prior art the energy density, the capacity shorten the cycle life of battery and adopt small area analysis to change into the defect that battery manufacture cost can be caused high that adopt big current to change into reduce battery, a kind of lithium-ion-power cell and manufacture method thereof and application are provided.Method of the present invention can either improve the manufacturing cost that the energy density of battery, capacity and cycle performance can reduce again battery.
The present inventor surprisingly finds under study for action, before utilizing anode sizing agent and cathode size to prepare battery, anode sizing agent and cathode size are carried out ultrasound filtration process respectively, effectively can improve the energy density of battery, capacity and cycle performance, make battery still have good combination property under big current changes into state, and the manufacturing cost of battery can be reduced.
Therefore, to achieve these goals, first aspect, the invention provides a kind of manufacture method of lithium-ion-power cell, described method comprises: anode sizing agent and cathode size are carried out ultrasound filtration process respectively, and battery prepared by the material then utilizing ultrasound filtration process to obtain.
Second aspect, the invention provides the lithium-ion-power cell that said method manufacture obtains.
The third aspect, the invention provides above-mentioned lithium-ion-power cell as the application in electric automobile lithium-ion-power cell.
Method of the present invention effectively can improve the energy density of battery, capacity and cycle performance, makes battery still have good combination property under big current changes into state, and can reduce the manufacturing cost of battery.Wherein, the lithium-ion-power cell that method manufacture of the present invention obtains, energy density is higher than 150Wh/kg, and cycle life is greater than 500 times, and 23 DEG C, 1C
5under A, the capability retention of the 500th circulation is still higher than 85%, and can be tested by acupuncture, safe and reliable.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Embodiment
Below the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
First aspect, the invention provides a kind of manufacture method of lithium-ion-power cell, the method comprises: anode sizing agent and cathode size are carried out ultrasound filtration process respectively, and battery prepared by the material then utilizing ultrasound filtration process to obtain.
In the inventive method, anode sizing agent contains positive active material, adhesive and conductive agent, and for positive active material, adhesive and conductive agent, there is no particular limitation, can be respectively various positive active materials, adhesive and conductive agent that this area is conventional.Under preferable case, positive active material is at least containing manganese and lithium two kinds of elements, further preferably, positive active material be nickle cobalt lithium manganate, cobalt acid lithium, nickel ion doped, lithium nickel cobalt dioxide, LiFePO4, lithium ferric manganese phosphate, ferric phosphate cobalt lithium and phosphoric acid ferrimanganic cobalt lithium in one or more, still more preferably, the D50 of positive active material is 1-20 micron; Adhesive is one or more in sodium carboxymethylcellulose (CMC), Kynoar (PVDF), butadiene-styrene rubber (SBR) and polypropylene; Conductive agent is one or more in carbon black, graphite, CNT (carbon nano-tube), Graphene and metal dust, and for metal dust, there is no particular limitation, and can be the conventional various metal dusts in this area, this be conventionally known to one of skill in the art, does not repeat them here.
In the inventive method, cathode size contains negative electrode active material, adhesive and conductive agent, and for negative electrode active material, adhesive and conductive agent, there is no particular limitation, can be respectively various negative electrode active materials, adhesive and conductive agent that this area is conventional.Under preferable case, negative electrode active material is the lithium ion layer structure that can embed or deviate from or spinel structure, and further preferably, negative electrode active material is graphite, lithium titanate, Graphene and can one or more in embedding lithium alloy; Adhesive is one or more in sodium carboxymethylcellulose (CMC), Kynoar (PVDF), butadiene-styrene rubber (SBR) and polypropylene; Conductive agent is one or more in carbon black, graphite, CNT (carbon nano-tube), Graphene and metal dust, and for metal dust, there is no particular limitation, and can be the conventional various metal dusts in this area, this be conventionally known to one of skill in the art, does not repeat them here.
In the inventive method, for the solvent used in anode sizing agent and cathode size, there is no particular limitation, the various solvents that this area is conventional can be respectively, such as, the solvent used in anode sizing agent can be water, ethanol or 1-METHYLPYRROLIDONE (NMP), and the solvent used in cathode size can be water, ethanol or 1-METHYLPYRROLIDONE (NMP).
In the inventive method, for the content of each component in anode sizing agent and cathode size, there is no particular limitation, the various content that this area is conventional can be respectively, such as, in anode sizing agent, the content of positive active material can be 82-96wt%, and the content of adhesive can be 0.5-10wt%, and the content of conductive agent can be 0.5-8wt%; In cathode size, the content of negative electrode active material can be 82-96wt%, and the content of adhesive can be 0.5-10wt%, and the content of conductive agent can be 0.5-8wt%.
In the inventive method, it will be understood by those skilled in the art that before respectively ultrasound filtration process is carried out to anode sizing agent and cathode size, anode sizing agent and cathode size can be mixed.For mode anode sizing agent and cathode size mixed, there is no particular limitation, as long as anode sizing agent and cathode size can be mixed.In order to improve the effect of follow-up ultrasound filtration process, under preferable case, the incorporation time of anode sizing agent and cathode size is 0.5-2 hour.
In the inventive method, in order to improve capacity and the cycle performance of battery further, under preferable case, the enforcement number of times of ultrasound filtration process is 3-5.Further preferably, the implementation condition of ultrasound filtration process comprises: supersonic frequency is 25-50kHz; Ultrasonic time is 3-60min, is further preferably 15-35min; The mesh filtering screen cloth used is 50-500 order, is further preferably 100-230 order.What those skilled in the art should understand that is, the aforementioned ultrasonic time is carry out once the ultrasonic time, and, preferably first carrying out ultrasonic process carries out filtration treatment again in ultrasound filtration process, and in this case, 1 time ultrasound filtration is treated to 1 the ultrasonic process and 1 filtration treatment carried out successively, and 2 times ultrasound filtration is treated to 1 the ultrasonic process carried out successively, 1 filtration treatment, 1 ultrasonic process and 1 filtration treatment.
In the inventive method, in order to improve the cycle performance of battery further, under preferable case, the process that battery prepared by the described material utilizing ultrasound filtration process to obtain comprises: initial cells made by the material adopting described ultrasound filtration process to obtain, and described initial cells is carried out successively activation processing and change into process.
In the inventive method, prepare the method for initial cells through the material of ultrasound filtration process to utilizing there is no particular limitation, the various methods of battery prepared by the slurry that utilizes can commonly used for this area.Such as the method comprise by process the material that obtains according to coating, roll-in, cut, film-making, winding, fluid injection, sealing process prepare battery.Wherein, for the lithium-ion-power cell of 18650 models, when roll-in, the thickness of anode pole piece can be 0.155-0.165mm, and the thickness of cathode pole piece can be 0.140-0.150mm, when cutting, the width of anode pole piece can be 56-57mm, and the width of cathode pole piece can be 58-59mm.
In the inventive method, for fluid injection electrolyte used in the process preparing battery, there is no particular limitation, the various electrolyte can commonly used for this area, such as electrolyte can be organic solvent, includes but not limited to methyl ethyl carbonate (EMC), carbonic acid formicester (DC), ethylene carbonate (EC), propene carbonate (PC), dimethyl carbonate (DMC), ethylene fat etc.
In the inventive method, for membrane thicknesses used when preparing battery, there is no particular limitation, can be the conventional thickness in this area, and under preferable case, when preparing battery, membrane thicknesses used is not more than 30 microns.
In the inventive method, for the material of battery case used when preparing battery, there is no particular limitation, can be the conventional various materials in this area, and under preferable case, when preparing battery, battery case used is aluminum alloy materials or stainless steel material.
In the inventive method, for the shape of battery, there is no particular limitation, can be the conventional various shapes in this area.Under preferable case, the shape of battery is cylinder.
In the inventive method, under preferable case, the condition of activation processing comprises: activation temperature is 25-50 DEG C, and soak time is 20-30 hour.
In the inventive method, in order to improve the cycle performance of battery further, under preferable case, the mode changing into process is that constant current changes into, and the electric current changed into is greater than 0.6C
5a.In order to further improve the cycle performance of battery, further preferably, the electric current changed into is 0.6-15C
5a, is further preferably 0.8-6C
5a, the cut-ff voltage changed into is 3.8-4.0V.It will be understood by those skilled in the art that 1C
5in A, C
5refer to that 5h leads the numerical value of discharge capacity, 1C
5refer to the C of 1 multiplying power
5the electric current of electric discharge.
Second aspect, the invention provides the lithium-ion-power cell that said method manufacture obtains.
The energy density of lithium-ion-power cell of the present invention is higher than 150Wh/kg, and the cycle life of battery is greater than 500 times, and 23 DEG C, 1C
5under A, the capability retention of the 500th circulation is still higher than 85%, and can be tested by acupuncture, safe and reliable.Under preferable case, the shape of battery is cylinder.
The third aspect, the invention provides above-mentioned lithium-ion-power cell as the application in electric automobile lithium-ion-power cell.
Embodiment
Below will be described the present invention by embodiment and comparative example.If no special instructions, each material used in embodiment and comparative example is all commercially available.
In following examples and comparative example, the energy density of battery refers to the energy of Unit Weight, wherein energy=capacity * voltage.
23 DEG C, 1C
5the method of the capability retention determination experiment after 500 times of circulating under A is: QC/T743-2006.
The assay method of acupuncture experiment is: QC/T743-2006.
Embodiment 1
The present embodiment is for illustration of lithium-ion-power cell of the present invention and manufacture method thereof.
(1) 5000g nickle cobalt lithium manganate, 150g carbon black, 150g Kynoar and 4000gN-methyl pyrrolidone are carried out liquid phase mixing, stir and form uniform anode sizing agent in 1 hour, then 4 ultrasound filtration process are carried out to anode sizing agent, wherein, all first carry out once ultrasonic process during each ultrasound filtration process and carry out a filtration treatment again, and the supersonic frequency of each ultrasonic process is 40kHz, ultrasonic time is 30min, during filtration, the anode sizing agent through ultrasonic process is all crossed 150 object screen clothes.
(2) 3000g graphite, 30g conductive black, 30g sodium carboxymethylcellulose and 120g butadiene-styrene rubber, 3300g water are carried out liquid phase mixing, stir and form uniform cathode size in 1 hour, then anticathode slurry carries out 4 ultrasound filtration process, wherein, all first carry out once ultrasonic process during each ultrasound filtration process and carry out a filtration treatment again, and the supersonic frequency of each ultrasonic process is 40kHz, ultrasonic time is 30min, during filtration, the cathode size through ultrasonic process is all crossed 150 object screen clothes.
(3) anode sizing agent step (1) obtained by painting process and aluminium foil are bonded together, the cathode size obtain step (2) and Copper Foil are bonded together, make positive pole rolling pole piece and negative pole rolling pole piece respectively, then positive pole rolling pole piece is passed through the thickness of roll squeezer roll-in to 0.160mm, negative pole rolling pole piece is passed through the thickness of roll squeezer roll-in to 0.145mm, with cutting machine, anode pole piece is divided the width being switched to 56mm again, cathode pole piece is divided the width being switched to 58mm, lug in welding, be wound into cylindrical cell, put in aluminum alloy battery shell, electrolyte (EC/DMC=1:1 (volume ratio)) is injected in the battery of assembling, under the environment of humidity 1%, battery is sealed, make the lithium-ion-power cell of 18650 models.
(4) battery sealing mouth is activated 25 hours at 35 DEG C, then carry out constant current and change into, the electric current changed into is 1C
5a, the cut-ff voltage changed into is 3.9V.
Embodiment 2
The present embodiment is for illustration of lithium-ion-power cell of the present invention and manufacture method thereof.
(1) 5000g nickel ion doped, 150g graphite, 150g carboxymethyl cellulose and 4000g ethanol are carried out liquid phase mixing, stir and form uniform anode sizing agent in 1.5 hours, then 3 ultrasound filtration process are carried out to anode sizing agent, wherein, all first carry out once ultrasonic process during each ultrasound filtration process and carry out a filtration treatment again, and the supersonic frequency of each ultrasonic process is 50kHz, ultrasonic time is 15min, during filtration, the anode sizing agent through ultrasonic process is all crossed 120 object screen clothes.
(2) 3000g graphite, 30g CNT (carbon nano-tube), 150g butadiene-styrene rubber and 3300g ethanol are carried out liquid phase mixing, stir and form uniform cathode size in 1.5 hours, then anticathode slurry carries out 3 ultrasound filtration process, wherein, all first carry out once ultrasonic process during each ultrasound filtration process and carry out a filtration treatment again, and the supersonic frequency of each ultrasonic process is 50kHz, ultrasonic time is 15min, during filtration, the cathode size through ultrasonic process is all crossed 120 object screen clothes.
(3) anode sizing agent step (1) obtained by painting process and aluminium foil are bonded together, the cathode size obtain step (2) and Copper Foil are bonded together, make positive pole rolling pole piece and negative pole rolling pole piece respectively, then positive pole rolling pole piece is passed through the thickness of roll squeezer roll-in to 0.160mm, negative pole rolling pole piece is passed through the thickness of roll squeezer roll-in to 0.145mm, with cutting machine, anode pole piece is divided the width being switched to 56mm again, cathode pole piece is divided the width being switched to 58mm, lug in welding, be wound into cylindrical cell, put in aluminum alloy battery shell, electrolyte (EC/DMC/PC=1:1:1 (volume ratio)) is injected in the battery of assembling, under the environment of humidity 1%, battery is sealed, make the lithium-ion-power cell of 18650 models.
(4) battery sealing mouth is activated 20 hours at 40 DEG C, then carry out constant current and change into, the electric current changed into is 0.8C
5a, the cut-ff voltage changed into is 3.8V.
Embodiment 3
(1) 2500g LiMn2O4,2500g nickle cobalt lithium manganate, 150g carbon black, 150g Kynoar and 4000gN-methyl pyrrolidone are carried out liquid phase mixing, stir and form uniform anode sizing agent in 1 hour, then 5 ultrasound filtration process are carried out to anode sizing agent, wherein, all first carry out once ultrasonic process during each ultrasound filtration process and carry out a filtration treatment again, and the supersonic frequency of each ultrasonic process is 25kHz, ultrasonic time is 35min, during filtration, the anode sizing agent through ultrasonic process is all crossed 150 object screen clothes.
(2) 3000g graphite, 30g carbon black, 150g Kynoar and 3300gN-methyl pyrrolidone are carried out liquid phase mixing, stir and form uniform cathode size in 1 hour, then anticathode slurry carries out 5 ultrasound filtration process, wherein, all first carry out once ultrasonic process during each ultrasound filtration process and carry out a filtration treatment again, and the supersonic frequency of each ultrasonic process is 25kHz, ultrasonic time is 35min, during filtration, the cathode size through ultrasonic process is all crossed 150 object screen clothes.
(3) anode sizing agent step (1) obtained by painting process and aluminium foil are bonded together, the cathode size obtain step (2) and Copper Foil are bonded together, make positive pole rolling pole piece and negative pole rolling pole piece respectively, then positive pole rolling pole piece is passed through the thickness of roll squeezer roll-in to 0.160mm, negative pole rolling pole piece is passed through the thickness of roll squeezer roll-in to 0.145mm, with cutting machine, anode pole piece is divided the width being switched to 56mm again, cathode pole piece is divided the width being switched to 58mm, lug in welding, be wound into cylindrical cell, put in aluminum alloy battery shell, electrolyte (EC/DMC=1:1 (volume ratio)) is injected in the battery of assembling, under the environment of humidity 1%, battery is sealed, make the lithium-ion-power cell of 18650 models.
(4) battery sealing mouth is activated 30 hours at 30 DEG C, then carry out constant current and change into, the initial current changed into is 6C
5a, the cut-ff voltage changed into is 4.0V.
Embodiment 4
According to the method for embodiment 1, unlike, all carry out 2 ultrasound filtration process in step (1) and (2), and the condition of each ultrasonic process is: supersonic frequency is 20kHz, ultrasonic time is 60min.
Embodiment 5
According to the method for embodiment 1, unlike, carry out constant current when changing into process in step (4) and change into, and the electric current changed into is 0.6C
5a.
Embodiment 6
According to the method for embodiment 1, unlike, carry out constant current when changing into process in step (4) and change into, and the electric current changed into is 15C
5a.
Embodiment 7
According to the method for embodiment 1, unlike, carry out constant current when changing into process in step (4) and change into, and the cut-ff voltage changed into is 4.2V.
Comparative example 1
According to the method for embodiment 1, after forming uniform anode sizing agent and cathode size respectively in, step (1) and (2), all do not carry out ultrasound filtration process, but directly carry out step (3).
Comparative example 2
According to the method for embodiment 1, after forming uniform anode sizing agent and cathode size respectively in, step (1) and (2), all do not carry out ultrasound filtration process, but directly carry out step (3).And in step (4), carry out constant current and change into when changing into process, and the initial current changed into is 0.3C
5a, the cut-ff voltage changed into is 4.0V.
Test example
Respectively the battery that embodiment 1-7 and comparative example 1-2 obtains is measured to energy density, carries out acupuncture experiment and 23 DEG C, 1C
5circulate under A the capability retention determination experiment after 500 times, and result is as shown in table 1.
Table 1
From embodiment in table 1 and comparative example data relatively, before preparing battery, anode sizing agent and cathode size are carried out ultrasound filtration process respectively, under big current changes into state, the lithium-ion-power cell that method manufacture of the present invention obtains still has obviously higher energy density, capacity and cycle performance, and, when not affecting the energy density of battery, capacity and cycle performance, the manufacturing cost of battery obviously can be reduced, and can be tested by acupuncture, safe and reliable.
Embodiment in table 11 is more known with the data of embodiment 4, carry out 3-5 ultrasound filtration process, and in ultrasonic process, when supersonic frequency is 25-50kHz, when ultrasonic time is 15-35min, energy density and the cycle performance of obtained battery can be improved further.
Embodiment in table 11 is more known with the data of embodiment 5-7, the battery sealing mouth proceeded activation processing and change into process, capacity and the cycle performance of obtained battery can be improved further; And, the battery after activation processing is carried out constant current and changes into, and the electric current changed into is 0.8-6C
5a, when the cut-ff voltage changed into is 3.8-4.0V, further can improve energy density and the cycle performance of obtained battery.
Method of the present invention effectively can improve the energy density of battery, capacity and cycle performance, makes battery still have good combination property under big current changes into state, and can reduce the manufacturing cost of battery.Wherein, the battery that method manufacture of the present invention obtains, energy density is higher than 150Wh/kg, and cycle life is greater than 500 times, and 23 DEG C, 1C
5under A, the capability retention of the 500th circulation is still higher than 85%, and can be tested by acupuncture, safe and reliable.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned execution mode, within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible compound mode.
In addition, also can carry out combination in any between various different execution mode of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. a manufacture method for lithium-ion-power cell, is characterized in that, described method comprises: anode sizing agent and cathode size are carried out ultrasound filtration process respectively, and battery prepared by the material then utilizing ultrasound filtration process to obtain.
2. method according to claim 1, wherein, the enforcement number of times of described ultrasound filtration process is 3-5.
3. method according to claim 1 and 2, wherein, the implementation condition of described ultrasound filtration process comprises: supersonic frequency is 25-50kHz; Ultrasonic time is 3-60min, is preferably 15-35min; The mesh filtering screen cloth used is 50-500 order, is preferably 100-230 order.
4. method according to claim 1 and 2, wherein, the process that battery prepared by the described material utilizing ultrasound filtration process to obtain comprises: initial cells made by the material adopting described ultrasound filtration process to obtain, and described initial cells is carried out successively activation processing and change into process.
5. method according to claim 4, wherein, described in change into process mode be that constant current changes into, and the electric current changed into is greater than 0.6C
5a.
6. method according to claim 5, wherein, the electric current changed into is 0.6-15C
5a, is preferably 0.8-6C
5a, the cut-ff voltage changed into is 3.8-4.0V.
7. method according to claim 1 and 2, wherein, described anode sizing agent contains positive active material, adhesive and conductive agent, described positive active material be nickle cobalt lithium manganate, cobalt acid lithium, nickel ion doped, lithium nickel cobalt dioxide, LiFePO4, lithium ferric manganese phosphate, ferric phosphate cobalt lithium and phosphoric acid ferrimanganic cobalt lithium in one or more; Described adhesive is one or more in sodium carboxymethylcellulose, Kynoar, butadiene-styrene rubber and polypropylene; Described conductive agent is one or more in carbon black, graphite, CNT (carbon nano-tube), Graphene and metal dust.
8. method according to claim 1 and 2, wherein, described cathode size contains negative electrode active material, adhesive and conductive agent, and described negative electrode active material is graphite, lithium titanate, Graphene and can one or more in embedding lithium alloy; Described adhesive is one or more in carboxymethyl cellulose, Kynoar, butadiene-styrene rubber and polypropylene; Described conductive agent is one or more in carbon black, graphite, CNT (carbon nano-tube), Graphene and metal dust.
9. the lithium-ion-power cell that in claim 1-8, described in any one, method manufacture obtains.
10. lithium-ion-power cell according to claim 9 is as the application in electric automobile lithium-ion-power cell.
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201295597Y (en) * | 2008-11-10 | 2009-08-26 | 江苏伊思达电池有限公司 | Outer circulation type slurry vacuum mixer |
| CN102136606A (en) * | 2010-11-30 | 2011-07-27 | 珠海金峰航电源科技有限公司 | Lithium ion battery preparation method |
| CN102368571A (en) * | 2011-09-05 | 2012-03-07 | 东莞新能源科技有限公司 | Precharge method of lithium ion batteries |
| CN102544515A (en) * | 2012-02-21 | 2012-07-04 | 杭州力奥科技有限公司 | Lithium iron phosphate power battery water-based cathode slurry and method for preparing cathode pole piece |
| CN102593520A (en) * | 2012-02-20 | 2012-07-18 | 宁德新能源科技有限公司 | Method for improving hardness of lithium ion cell |
| CN102637903A (en) * | 2012-04-06 | 2012-08-15 | 宁德新能源科技有限公司 | Formation method of lithium ion battery |
| CN102938472A (en) * | 2011-08-16 | 2013-02-20 | 上海德朗能电池有限公司 | Formation method of lithium ion battery with lithium titanate as negative electrode and lithium ion battery manufactured by the same |
| CN103296312A (en) * | 2013-06-05 | 2013-09-11 | 宜兴奕润新能源科技有限公司 | Preparation method of large-power high-magnification lithium iron phosphate battery |
| CN203264424U (en) * | 2013-05-15 | 2013-11-06 | 宁德新能源科技有限公司 | Slurry filter |
| CN103840136A (en) * | 2012-11-21 | 2014-06-04 | 信越化学工业株式会社 | Cathode materials for electricity storage device, electrode for electricity storage device and electricity storage device, and method for manufacturing them |
| CN104733783A (en) * | 2015-04-01 | 2015-06-24 | 广东烛光新能源科技有限公司 | Preparation method of lithium ion battery |
| CN204429144U (en) * | 2014-12-10 | 2015-07-01 | 山东恒宇新能源有限公司 | A kind of new type lithium ion battery pulp blender |
-
2015
- 2015-08-06 CN CN201510477642.5A patent/CN105161767B/en not_active Expired - Fee Related
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201295597Y (en) * | 2008-11-10 | 2009-08-26 | 江苏伊思达电池有限公司 | Outer circulation type slurry vacuum mixer |
| CN102136606A (en) * | 2010-11-30 | 2011-07-27 | 珠海金峰航电源科技有限公司 | Lithium ion battery preparation method |
| CN102938472A (en) * | 2011-08-16 | 2013-02-20 | 上海德朗能电池有限公司 | Formation method of lithium ion battery with lithium titanate as negative electrode and lithium ion battery manufactured by the same |
| CN102368571A (en) * | 2011-09-05 | 2012-03-07 | 东莞新能源科技有限公司 | Precharge method of lithium ion batteries |
| CN102593520A (en) * | 2012-02-20 | 2012-07-18 | 宁德新能源科技有限公司 | Method for improving hardness of lithium ion cell |
| CN102544515A (en) * | 2012-02-21 | 2012-07-04 | 杭州力奥科技有限公司 | Lithium iron phosphate power battery water-based cathode slurry and method for preparing cathode pole piece |
| CN102637903A (en) * | 2012-04-06 | 2012-08-15 | 宁德新能源科技有限公司 | Formation method of lithium ion battery |
| CN103840136A (en) * | 2012-11-21 | 2014-06-04 | 信越化学工业株式会社 | Cathode materials for electricity storage device, electrode for electricity storage device and electricity storage device, and method for manufacturing them |
| CN203264424U (en) * | 2013-05-15 | 2013-11-06 | 宁德新能源科技有限公司 | Slurry filter |
| CN103296312A (en) * | 2013-06-05 | 2013-09-11 | 宜兴奕润新能源科技有限公司 | Preparation method of large-power high-magnification lithium iron phosphate battery |
| CN204429144U (en) * | 2014-12-10 | 2015-07-01 | 山东恒宇新能源有限公司 | A kind of new type lithium ion battery pulp blender |
| CN104733783A (en) * | 2015-04-01 | 2015-06-24 | 广东烛光新能源科技有限公司 | Preparation method of lithium ion battery |
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