CN107591569A - Method for improving wetting property of cylindrical lithium titanate battery - Google Patents
Method for improving wetting property of cylindrical lithium titanate battery Download PDFInfo
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- CN107591569A CN107591569A CN201710937118.0A CN201710937118A CN107591569A CN 107591569 A CN107591569 A CN 107591569A CN 201710937118 A CN201710937118 A CN 201710937118A CN 107591569 A CN107591569 A CN 107591569A
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- lithium titanate
- titanate battery
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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
本发明公开改善圆柱钛酸锂电池浸润性能的方法，适用于负极材料为钛酸锂材料的圆柱形锂离子电池，该浸润方法包括步骤：构建极片电解液传输微通道：将自带张力线铝箔均匀贴合在辊压机上、下辊的外表面，正负极极片辊压时通过贴合铝箔的区域，在极片表面形成平行的电解液传输微通道；组装注液：将辊压后的极片依次经过分切、卷绕、圆柱电池的组装、自动注液和点胶封口，制备出圆柱钛酸锂电池；将注液和封口完成的圆柱钛酸锂电池置于常温环境条件下进行浸润。本发明方法解决了圆柱钛酸锂电池的浸润困难的问题，实现了圆柱钛酸锂电池的常温浸润，缩短了产品生产周期、降低了生产成本。
The invention discloses a method for improving the wetting performance of a cylindrical lithium titanate battery, which is suitable for a cylindrical lithium ion battery whose negative electrode material is lithium titanate. The aluminum foil is evenly pasted on the outer surface of the upper and lower rollers of the roller press. When the positive and negative pole pieces are rolled, they pass through the area where the aluminum foil is pasted, forming parallel electrolyte transmission microchannels on the surface of the pole pieces; The pressed pole pieces are sequentially cut, wound, cylindrical battery assembly, automatic liquid injection and glue sealing to prepare a cylindrical lithium titanate battery; the cylindrical lithium titanate battery that has been injected and sealed is placed in a normal temperature environment Infiltration under conditions. The method of the invention solves the problem of difficult infiltration of the cylindrical lithium titanate battery, realizes the normal temperature infiltration of the cylindrical lithium titanate battery, shortens the product production cycle and reduces the production cost.
Description
Technical field
The present invention relates to a kind of method for improving cylinder lithium titanate battery wetting property, built especially by pole piece
The method that the micro- transmission channel of electrolyte accelerates electrolyte wet-out rate.
Background technology
In recent years, lithium titanate（LTO）The research of battery and application progressively increase, but its in preparation process there are still pair
Environmental condition requires the problems such as harsh, fluid injection infiltration difficulty and aerogenesis.Wherein, the fluid injection of lithium titanate battery and infiltration are relative to it
Its negative material is increasingly difficult.It is primarily due to that lithium titanate anode material particle diameter is smaller, porosity is larger, the narrower institute of pore-size distribution
Cause.
Fluid injection and infiltration problem for lithium titanate battery, existing researcher propose some and solve to think from different perspectives
Road.Angle of wetting such as can be increased to improve pole piece by the method heated to battery liquid-filling device, lift lithium-ion electric
The wetting property in pond（Cui Yugang, Sun Wei, Tian Xiujun, wait that there is the battery liquid-filling device and its electrolyte filling method of heating function, in
State's patent, application number：201610729413.2）.It is anti-sticking by spraying last layer Teflon, silicon nitride etc. on two pairs of rollers roller surface
Coating, the wetting property of electrodes of lithium-ion batteries can be improved（Wang Yong, Wu Chenyan, Zhu Xiufeng, wait is a kind of to improve lithium ion battery
The method of pole piece wetting property, Chinese patent, application number：201510136809.1）.By the electrode potential for changing electrode system
To change the interfacial tension of electrode system, change wellability of the electrolyte for active material（Wang Pan, Luo Ping, Sun Yi,
Deng a kind of electric Wicking method of battery electrolytes of, Chinese patent, application number：201610836844.9）.
The above method fluid injection to battery from different perspectives and the raising of wellability provide resolving ideas and method, but should
For still having many difficulties in terms of actual production.As heater increase energy consumption cost, device are complicated, to the up-down rollers of roll squeezer
Sprayed, the irreversible breaking to pressure roller will be caused, it is good by changing the method novelty of electrode potential of electrode system, but
Poor practicability etc..
To solve the infiltration sex chromosome mosaicism of lithium titanate cylindrical battery, the invention provides a kind of new cylindrical battery pole piece infiltration
Method, have the characteristics that novelty it is good, it is creative it is strong, practical value is high, in lifting cylinder lithium titanate battery pole piece electrolyte
There is remarkable result in terms of wellability, and do not cause cost to increase substantially.The present invention principle be：Climbed from lifting electrolyte
It is designed in terms of active force in 3 big power, is longitudinally climbed microchannel in pole piece structure electrolyte, accelerate barrier film and pole
Capillary wick speed between piece surface, and then realize the purpose of the present invention.
The content of the invention
It is an object of the invention to solve the problems such as difficult cylinder lithium titanate battery fluid injection and wellability difference, there is provided Yi Zhonggeng
The method of novel, more practical improvement cylinder lithium titanate battery electrolyte wetting property, to reach the mesh that battery quickly infiltrates.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of method for improving cylinder lithium titanate battery wetting property, including structure pole piece electrolyte transmission microchannel, assembling note
Liquid and normal temperature infiltration, are comprised the following steps that：
（1）Build pole piece electrolyte transmission microchannel：Tension lines aluminium foil will be carried uniformly it is fitted in the appearance of roll squeezer upper and lower roll
Face, the positive and negative electrode pole piece after coated drying carry out roll-in by the tension lines aluminium foil region of roll squeezer, formed in pole piece
Parallel electrolyte transmission microchannel；
（2）Assembling fluid injection：By complete microchannel structure both positive and negative polarity pole piece successively by cutting, winding, cylindrical battery assembling,
Automatic fluid injection and dispensing sealing, prepare cylinder lithium titanate battery；
（3）Normal temperature infiltrates：Cylinder lithium titanate battery is placed under the conditions of normal temperature environment and stood, it is complete after infiltrating certain time
Wellability into cylinder lithium titanate battery improves and lifting.
Further scheme, the step（1）In the tension lines aluminium foil surface that carries have parallel tension lines, the direction of tension lines
By the angle in roll squeezer direction it is 45-90 ° with pole piece, tension lines depth is 0.1-5 μm, and width is 0.2-5 μm.
Further scheme, the step（1）Middle anode pole piece active material is Ni, Co, Mn oxide and its binary, ternary
Composite materials, LiFePO4, cathode pole piece active material are spinel lithium titanate material, cylindrical battery model 32134,
32650。
Further scheme, the step（1）In carry immersion 10-60min in concentrated sulfuric acid before tension lines aluminium foil uses, take
Go out, cleaning and the 50-80 DEG C of baking 3-6h in baking oven.
Further scheme, the step（2）In reservoir quantity be 4.0-6.0g/Ah.
Further scheme, the step（3）In cylinder lithium titanate battery infiltration environment temperature be 20-35 DEG C, environment phase
To humidity RH≤60%, infiltrating time 2-12h.
Beneficial effects of the present invention：The present invention will improve the chemical conversion of cylinder lithium titanate battery wetting property and be carried out in three steps, the
One step is committed step in the longitudinal microchannel of quickly climbing of pole piece structure electrolyte, is the weight that the present invention is able to successful implementation
Ensure, its main purpose utilizes microchannel lifting electricity to shorten the path of electrolyte imbibition between pole piece and barrier film
Solve liquid rate of climb；Second step is conventional cylindrical battery assembling procedure, wherein reservoir quantity and battery design capacity and pole piece, barrier film
Porosity is closely related, and the lithium titanate special electrolysis liquid that the country is bestowed by heaven, Shan Shandeng producers provide can be selected in electrolyte；3rd step is adopted
The purpose infiltrated with normal temperature is to complete the infiltration and effect stably of electrolyte in the battery.
Brief description of the drawings
Fig. 1 is a kind of process chart for the method for improving cylinder lithium titanate battery wetting property of the present invention；
Fig. 2 is cylinder lithium titanate battery pole piece electrolyte wellability schematic diagram, and the wellability power of electrolyte comes from 3 sides
Face, the liquid bridge imbibition between its septation and pole piece are active force；
Fig. 3 is the aluminium foil schematic diagram that belt tension line is bonded in roll-in double roller；
Fig. 4 is the SEM surface topography maps of tension lines aluminium foil surface, has substantial amounts of parallel tension force in aluminium foil surface as can be seen from FIG.
Line；
Fig. 5 is the pole piece wet face state of control group experiment, it is possible to find after 30 DEG C of normal temperature infiltrate 6h（Relative humidity
RH60%）, its pole piece centre position still suffers from light areas, shows that its wellability is poor；
Fig. 6 is the wet face state that the battery of embodiment 1 disassembles rear pole piece, it is possible to find after 30 DEG C of normal temperature infiltrate 6h（Relatively
Humidity RH60%）, its pole piece color is homogeneous, shows that its wellability is good.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
As shown in figure 1, a kind of method for improving cylinder lithium titanate battery wetting property, comprises the following steps：
（1）Build pole piece electrolyte transmission microchannel
The outer surface of roll squeezer upper and lower roll tension lines aluminium foil will be carried uniformly is fitted in, joint adhesive is conventional seccotine or aluminium foil
Adhesive tape, it is ensured that aluminium foil width is wider than pole piece, wherein carrying tension lines aluminium foil surface has substantial amounts of parallel tension lines, tension lines
Direction and pole piece by the angle in roll squeezer direction be 80 °, tension lines mean depth is 0.2 μm or so, and width is 2 μm of left sides
It is right；Tension lines aluminium foil soaks 30min in concentrated sulfuric acid before use, takes out, cleaning and 60 DEG C of baking 6h in a conventional oven, when just
When cathode pole piece carries out roll-in by the pressure roller with parallel tension lines, pole piece correspondingly produces a large amount of parallel microchannels, structure
Build up electrolyte longitudinally quick climbing passageway；Wherein, auspicious Xiang ternary NCM622 materials, negative pole are self-produced lithium titanate LTO materials, every
Film is Cangzhou jewel 12+4 one side ceramic diaphragms, and electrolyte is bestowed by heaven lithium titanate Special electric for the Guangzhou of the film for additive containing both positive and negative polarity
Solve liquid, cylindrical battery model 32134；
（2）Assembling fluid injection
By the both positive and negative polarity pole piece of above-mentioned completion microchannel structure successively by cutting, winding, assembling, fluid injection and sealing, prepare
Cylinder lithium titanate battery, wherein reservoir quantity are 6g/Ah, battery design 9Ah, altogether fluid injection 54g；
（3）Normal temperature infiltrates
It is 30 DEG C that the cylinder lithium titanate battery prepared is placed on into environment temperature, envionmental humidity RH 60% indoor progress
Complete wetting and stable processing, infiltrating time 6h.
Fig. 2 is cylinder lithium titanate battery pole piece electrolyte wellability schematic diagram, and the wellability power of electrolyte comes from 3
Aspect, the liquid bridge imbibition between its septation and pole piece are active force；Fig. 3 is that the aluminium foil that belt tension line is bonded in roll-in double roller shows
It is intended to；Fig. 4 is the SEM surface topography maps of tension lines aluminium foil surface, has substantial amounts of parallel opening in aluminium foil surface as can be seen from FIG.
The line of force.
The battery of normal temperature infiltration will be completed, any taking-up 2 is carried out disassembling processing, and pole piece and membrane surface are observed after disassembling
Electrolyte Infiltrating and state.Fig. 5 is the pole piece wet face state of control group experiment, it is possible to find is infiltrated by 30 DEG C of normal temperature
After 6h（Relative humidity RH60%）, its pole piece centre position still suffers from light areas, shows that its wellability is poor；Fig. 6 is to implement
The battery of example 1 disassembles the wet face state of rear pole piece, it is possible to find after 30 DEG C of normal temperature infiltrate 6h（Relative humidity RH60%）, its
Pole piece color is homogeneous, shows that its wellability is good.
Embodiment 2
A kind of method for improving cylinder lithium titanate battery wetting property, comprises the following steps：
（1）Build pole piece electrolyte transmission microchannel
The outer surface of roll squeezer upper and lower roll tension lines aluminium foil will be carried uniformly is fitted in, joint adhesive is conventional seccotine or aluminium foil
Adhesive tape, it is ensured that aluminium foil width is wider than pole piece；Wherein carrying tension lines aluminium foil surface has substantial amounts of parallel tension lines, tension lines
Direction and pole piece by the angle in roll squeezer direction be 45 °, tension lines mean depth is 0.1 μm or so, and width is 5 μm of left sides
It is right；Tension lines aluminium foil soaks 10min in concentrated sulfuric acid before use, takes out, cleaning and 80 DEG C of baking 3h in a conventional oven；When just
When cathode pole piece carries out roll-in by the pressure roller with parallel tension lines, pole piece correspondingly produces a large amount of parallel microchannels, structure
Build up electrolyte longitudinally quick climbing passageway；Wherein, auspicious Xiang ternary NCM111 materials, negative pole are self-produced lithium titanate LTO materials, every
Film is Cangzhou jewel 12+4 one side ceramic diaphragms, and electrolyte is bestowed by heaven lithium titanate Special electric for the Guangzhou of the film for additive containing both positive and negative polarity
Solve liquid, cylindrical battery model 32134；
（2）Assembling fluid injection
By the both positive and negative polarity pole piece of above-mentioned completion microchannel structure successively by cutting, winding, assembling, fluid injection and sealing, prepare
Cylinder lithium titanate battery, wherein reservoir quantity are 5g/Ah, battery design 8Ah, altogether fluid injection 40g；
（3）Normal temperature infiltrates
It is 20 DEG C that the cylinder lithium titanate battery prepared is placed on into environment temperature, envionmental humidity RH40% indoor progress
Complete wetting and stable processing, infiltrating time 2h, obtain the good cylinder lithium titanate battery of both positive and negative polarity wellability.
Embodiment 3
A kind of method for improving cylinder lithium titanate battery wetting property, comprises the following steps：
（1）Build pole piece electrolyte transmission microchannel
Tension lines aluminium foil will be carried uniformly be fitted in the outer surface of roll squeezer upper and lower roll first, joint adhesive be conventional seccotine or
Aluminum foil and adhesive tape, it is ensured that aluminium foil width is wider than pole piece；Wherein carrying tension lines aluminium foil surface has substantial amounts of parallel tension lines,
The direction of the line of force is 90 ° by the angle in roll squeezer direction with pole piece, and tension lines mean depth is 5 μm or so, and width is 5 μm of left sides
It is right；Tension lines aluminium foil soaks 60min in concentrated sulfuric acid before use, takes out, cleaning and 50 DEG C of baking 3h in a conventional oven；When just
When cathode pole piece carries out roll-in by the pressure roller with parallel tension lines, pole piece correspondingly produces a large amount of parallel microchannels, structure
Build up electrolyte longitudinally quick climbing passageway；Wherein, auspicious Xiang ternary NCM523 materials, negative pole are self-produced lithium titanate LTO materials, every
Film is Cangzhou jewel 12+4 one side ceramic diaphragms, and electrolyte is bestowed by heaven lithium titanate Special electric for the China fir China fir of the film for additive containing both positive and negative polarity
Solve liquid, cylindrical battery model 32134；
（2）Assembling fluid injection
By the both positive and negative polarity pole piece of above-mentioned completion microchannel structure successively by cutting, winding, assembling, fluid injection and sealing, prepare
Cylinder lithium titanate battery, wherein reservoir quantity are 4g/Ah, battery design 8.5Ah, altogether fluid injection 34g；
（3）Normal temperature infiltrates
It is 35 DEG C that the cylinder lithium titanate battery prepared is placed on into environment temperature, envionmental humidity RH38% indoor progress
Complete wetting and stable processing, infiltrating time 12h, obtain the good cylinder lithium titanate battery of both positive and negative polarity wellability.
The above-mentioned description to embodiment is understood that for ease of those skilled in the art and using this hair
It is bright.Person skilled in the art obviously can easily make various modifications to case study on implementation, and described herein one
As principle be applied in other embodiment without by performing creative labour.Therefore, the invention is not restricted to implementation case here
Example, for those skilled in the art according to the announcement of the present invention, not departing from improvement that scope made and modification all should be
Within protection scope of the present invention.
Claims (6)
- A kind of 1. method for improving cylinder lithium titanate battery wetting property, it is characterised in that including structure pole piece electrolyte transmission Microchannel, assembling fluid injection and normal temperature infiltration, are comprised the following steps that：（1）Build pole piece electrolyte transmission microchannel：Tension lines aluminium foil will be carried uniformly it is fitted in the appearance of roll squeezer upper and lower roll Face, the positive and negative electrode pole piece after coated drying carry out roll-in by the tension lines aluminium foil region of roll squeezer, formed in pole piece Parallel electrolyte transmission microchannel；（2）Assembling fluid injection：By complete microchannel structure both positive and negative polarity pole piece successively by cutting, winding, cylindrical battery assembling, Automatic fluid injection and dispensing sealing, prepare cylinder lithium titanate battery；（3）Normal temperature infiltrates：Cylinder lithium titanate battery is placed under the conditions of normal temperature environment and stood, it is complete after infiltrating certain time Wellability into cylinder lithium titanate battery improves and lifting.
- 2. the method according to claim 1 for improving cylinder lithium titanate battery wetting property, it is characterised in that the step （1）In the tension lines aluminium foil surface that carries have a parallel tension lines, the angle that direction and the pole piece of tension lines pass through roll squeezer direction For 45-90 °, tension lines depth is 0.1-5 μm, and width is 0.2-5 μm.
- 3. the method according to claim 1 for improving cylinder lithium titanate battery wetting property, it is characterised in that the step （1）Middle anode pole piece active material is Ni, Co, Mn oxide and its binary, ternary complex material, LiFePO4, negative pole pole Piece active material is spinel lithium titanate material, cylindrical battery model 32134,32650.
- 4. the method according to claim 1 for improving cylinder lithium titanate battery wetting property, it is characterised in that the step （1）In carry immersion 10-60min in concentrated sulfuric acid before tension lines aluminium foil uses, take out, clean and the 50-80 DEG C of baking in baking oven 3-6h。
- 5. the method according to claim 1 for improving cylinder lithium titanate battery wetting property, it is characterised in that the step （2）In reservoir quantity be 4.0-6.0g/Ah.
- 6. the method according to claim 1 for improving cylinder lithium titanate battery wetting property, it is characterised in that the step （3）In cylinder lithium titanate battery infiltration environment temperature be 20-35 DEG C, envionmental humidity RH≤60%, infiltrating time 2- 12h。
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| CN201710937118.0A CN107591569A (en) | 2017-10-10 | 2017-10-10 | Method for improving wetting property of cylindrical lithium titanate battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108923076A (en) * | 2018-06-26 | 2018-11-30 | 苏州英诺达自动化科技有限公司 | A kind of preparation method with high-safety lithium battery |
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