CN102637906B - Preparation method of winding-structure lithium ion battery - Google Patents
Preparation method of winding-structure lithium ion battery Download PDFInfo
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- CN102637906B CN102637906B CN201210098389.9A CN201210098389A CN102637906B CN 102637906 B CN102637906 B CN 102637906B CN 201210098389 A CN201210098389 A CN 201210098389A CN 102637906 B CN102637906 B CN 102637906B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention belongs to the technical field of lithium ion batteries and particularly relates to a preparation method of a winding lithium ion battery. The preparation method comprises the following steps of: coating anode paste on an anode current collector, drying and then cold pressing the anode paste, and then bending an anode plate to be V-shaped; processing an cathode plate with the same steps, placing the bent anode plate and the bent cathode plate in a crossing way, placing a diaphragm between the anode plate and the cathode plate, welding and connecting the anode plate by virtue of an anode pole ear, and welding and connecting the cathode plate by virtue of a cathode pole ear, thus obtaining a pole plate group; winding the pole plate group to form a battery cell, placing the battery cell in a packaging bag, and performing injection and formation to obtain the lithium ion battery. Compared with the prior art, the preparation method decreases the resistance of the pole plates through bending the pole plates, thus reducing ohmic polarization in a charge-discharge process, improving the consistency of the battery, and obviously reducing the gas production speed of joule heat and side reaction in the charge-discharge process so as to improve the power multiplying performance and prolong the cycle life of the lithium battery and a lithium ion battery pack.
Description
Technical field
The invention belongs to technical field of lithium ion, particularly relate to a kind of preparation method of coiled lithium ion battery of large multiplying power.
Background technology
Lithium ion battery because have that energy density is high, cycle performance is excellent, the advantage such as environmentally friendly and memory-less effect, in consumption electronic product, as the aspects such as notebook computer, smart mobile phone, panel computer and electric tool (as electric automobile) are widely used.General consumption electronic product is all adopt DC power supply charging, and the charging interval is not generally 3 hours to 10 hours not etc.And at low ambient temperatures, in order to prevent battery from analysing lithium, generally all charging and discharging currents density can be reduced to 1/3rd or 1/5th under normal temperature not etc.And with the quickening pace of modern life, terminal consumer wishes that the charge/discharge rates of electronic product is accelerated, particularly under the environment of low temperature, also high current charge-discharge can be used.We know inside lithium ion cell mainly chemical system, large current density and low temperature environment can cause inside battery to polarize, if charged under such circumstances, battery can be caused to analyse lithium, cause electrical property to worsen, also can cause safety problem simultaneously.
General electrical appliance all can have shutdown voltage, and generally from 3.0V ~ 3.6V not etc., and the normal charging/discharging voltage scope of lithium ion battery is 3.0V ~ 4.2V.If discharged in large current density and low temperature environment, in the electric discharge starting stage, because the existence of polarization causes cell discharge voltage sharply to decline, battery discharge platform voltage can be caused so very low, arrive the shutdown voltage of electrical appliance, cause electrical appliance normally to work.
Traditional lithium ion battery structure mainly contains winding-structure and lamination two kinds.Winding-structure is: both positive and negative polarity, and barrier film is all strip, and barrier film is placed between both positive and negative polarity and prevents short circuit from occurring.During assembling, both positive and negative polarity, barrier film becomes lithium-ion electric core by reel wound, and then by encapsulation, the operation such as fluid injection, activation completes production procedure.
And lamination compares winding-structure, difference is that the pole piece of lamination is that n both positive and negative polarity welds together respectively, and subsequent handling is with the lithium ion battery of winding-structure.So the lithium ion battery of lamination compares winding-structure, because pole piece parallel, so have the advantage of low resistance, large good rate capability, weak point is that lamination production efficiency is lower, particularly when pole piece is die-cut, the easy dry linting in its edge, causes inside battery to occur micro-short circuit even problems of excessive heat.In addition, because both positive and negative polarity pole piece adopts the mode of lug parallel connection welding in lamination, or needing to reserve certain space at closedtop place sealing part deposits weld zone, so also causes the energy density of battery to decrease.So the lithium ion battery of winding-structure application in the market at present widely.
And winding-structure battery pole piece links together in the mode of series connection, so compare laminated batteries, its resistance wants high, causes battery ohmic polarization to increase like this, affects the high rate performance of battery.Meanwhile, large resistance value also can cause battery temperature rise when high rate charge-discharge to increase, and causes inside battery side reaction to increase, worsens performance of lithium ion battery.
And the general capacity of electric automobile lithium ion battery used is comparatively large, the resistance requirement for battery is higher.Because electric automobile battery capacity used is very large, general monomer battery core capacity in tens ampere-hours to hundreds of ampere-hour, and be the connection in series-parallel of multiple battery, so require that the resistance of lithium ion battery is little as much as possible, reduce the Joule heat of whole battery system, ensure that the temperature of the inside of battery system is as much as possible close to room temperature, guarantees the electrical property of lithium ion battery.Otherwise under the condition that radiating condition is bad, along with the carrying out of discharge and recharge, the side reaction of inside lithium ion cell can aggravate.Inside lithium ion cell is chemical system, its in an environment of high temperature, the side reaction speed of inside battery can accelerate, and side reaction makes inside battery produce more gas, causes inner pressure of battery to increase, and destroys the interface of inside battery.Carry out discharge and recharge under these circumstances, the lighter can cause battery capacity to decline, and cycle performance worsens, and severe one may cause negative terminal surface to analyse lithium, and battery may be overheated, even blasts, and increases the potential safety hazard of lithium ion battery.
In view of this, the necessary preparation method providing a kind of lithium ion battery of winding-structure, to improve large high rate performance and the cycle performance of battery.
Summary of the invention
The object of the invention is to: for the deficiencies in the prior art, and a kind of preparation method of lithium ion battery of winding-structure is provided, to improve temperature rise when the large high rate performance of battery, cycle performance and high current charge-discharge, and solve battery discharge platform and to decline too fast problem, thus reduce the overheated risk of lithium ion battery.
In order to achieve the above object, the present invention adopts following technical scheme:
A preparation method for winding-structure lithium ion battery, comprises the following steps:
The first step, the preparation of positive plate: be coated on by anode sizing agent on plus plate current-collecting body, reserves positive plate white space in the both sides of the length direction of plus plate current-collecting body during coating, colds pressing, be then bent into V-shaped after anode sizing agent drying;
The preparation of negative plate: be coated on by cathode size on negative current collector, reserves negative plate white space in the both sides of the length direction of negative current collector during coating, colds pressing, be then bent into V-shaped after cathode size drying; The both positive and negative polarity pole piece of this bending structure can reduce pole piece resistance, improves high rate charge-discharge performance, reduces the temperature rise in charge and discharge process simultaneously, improves cycle life and the chemical property of lithium ion battery.
Second step, positive plate after bending and negative plate are intersected and places, make positive plate white space relative with negative plate white space, and barrier film is placed between positive plate and negative plate, then the positive plate white space being positioned at V-shaped two ends is welded to connect by positive pole ear, the negative plate white space being positioned at V-shaped two ends is welded to connect by negative lug, obtains pole piece group;
3rd step, is wound into battery core by pole piece group, battery core is placed in packaging bag, fluid injection, leaves standstill, changes into, obtains lithium ion battery after capacity.
Pole piece resistance can be reduced after pole piece bending, because after pole piece bending, make pole piece resistance be reduced to original n/mono-times (n is pole piece bending number of times).According to Joule heat formula Q=I
2rt, after resistance is reduced to original n/mono-times, Joule heat equally also can be reduced to original n/mono-, and then the Joule heat that can reduce in charge and discharge process, reduce the side reaction of inside lithium ion cell, also reduce the ohmic polarization in charge and discharge process simultaneously, improve high rate charge-discharge performance.
One as the preparation method of winding-structure lithium ion battery of the present invention is improved, and described positive plate is when being coated with, and the both sides of plus plate current-collecting body Width are reserved with horizontal white space.
One as the preparation method of winding-structure lithium ion battery of the present invention is improved, and the width of described horizontal white space is 2mm ~ 5mm.
One as the preparation method of winding-structure lithium ion battery of the present invention is improved, and the center line be bent to along positive plate length direction of described positive plate bends.
One as the preparation method of winding-structure lithium ion battery of the present invention is improved, and the center line be bent to along negative plate length direction of described negative plate bends.
One as the preparation method of winding-structure lithium ion battery of the present invention is improved, and described positive plate white space is arranged on the tow sides of positive plate; Described negative plate white space is arranged on the tow sides of negative plate.
One as the preparation method of winding-structure lithium ion battery of the present invention is improved, and described horizontal white space is arranged on the one side of positive plate, and during winding, described horizontal white space is relative with negative plate.
One as the preparation method of winding-structure lithium ion battery of the present invention is improved, and described positive plate is provided with multiple V-shaped, and described negative plate is provided with multiple V-shaped.
One as the preparation method of winding-structure lithium ion battery of the present invention is improved, and the V-shaped number that V-shaped number and negative plate that positive plate is provided with are provided with is equal.
Relative to prior art, the present invention adopts the method for bending pole piece to reduce pole piece resistance, solves the problem that traditional coiled lithium ion impedance is large.Battery pole piece in the present invention reels after bending n time again, the resistance of pole piece can be reduced to n/mono-of conventional batteries, greatly reduce pole piece resistance, reduce the ohmic polarization in charge and discharge process, improves battery with two side terminals.The method of the bending pole piece adopted in the present invention, obviously can reduce the aerogenesis speed of Joule heat in charge and discharge process and side reaction, and then improve high rate performance and the cycle life of lithium ion battery and Li-ion batteries piles, also reduce lithium ion battery and the overheated risk of Li-ion batteries piles simultaneously.
Adopt bending pole piece of the present invention, also improve the efficiency of rolling step simultaneously.For the battery of identical capacity, the length of pole piece can be reduced to one of conventional batteries and do, can by painting process, cold pressing process, the efficiency of rolling step doubles, and reduces process cost, improves the product competitiveness of lithium ion battery.In addition, because pole piece bending reduces pole piece resistance, decrease ohmic polarization, coating weight can be required to increase according to actual performance like this, improve the energy density of battery, and the electrical property of battery can not be affected.
Accompanying drawing explanation
Fig. 1 is anode pole piece structural representation of the present invention;
Fig. 2 is cathode pole piece structural representation of the present invention;
Fig. 3 is that the present invention bends rear anode pole piece structural representation;
Fig. 4 is that the present invention bends rear cathode pole piece structural representation;
Fig. 5 is that the present invention reels front both positive and negative polarity pole piece structure schematic diagram;
Fig. 6 is lithium ion battery of the present invention winding structural representation;
Fig. 7 is low temperature (-10 DEG C) the 2C discharge curve of the battery of the embodiment of the present invention 1 and comparative example 1;
Fig. 8 be the battery of the embodiment of the present invention 1 and comparative example 1 when 25C with 1C charge 1C electric discharge time cyclic curve;
Fig. 9 is the 2C curve of double curvature of battery when normal temperature (25 DEG C) of the embodiment of the present invention 1 and comparative example 1.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention and beneficial effect thereof are described in detail, but invention is not limited to this.
As shown in Fig. 1, Fig. 3, Fig. 5 and Fig. 6, positive plate 10 of the present invention, the positive plate white space 3 comprising plus plate current-collecting body 1, be coated in the positive pole diaphragm 2 on plus plate current-collecting body 1 and reserve on plus plate current-collecting body 1, positive plate 10 is bent into V-shaped, and positive plate white space 3 is connected by positive pole ear 4.V-shaped is at least one (as shown in Figure 3).
As shown in Fig. 2, Fig. 4, Fig. 5 and Fig. 6, negative plate 20 of the present invention, the negative plate white space 7 comprising negative current collector 5, be coated in the cathode membrane 6 on negative current collector 5 and reserve on negative current collector 5, negative plate 20 is bent into V-shaped, and negative plate white space 7 is connected by negative lug 8.V-shaped is at least one (as shown in Figure 4).As shown in Figure 6, lithium ion battery of the present invention, comprises positive plate 10, negative plate 20, is interval in barrier film 30 between positive plate 10 and negative plate 20, and electrolyte, and positive plate 10 and negative plate 20 are respectively above-mentioned positive plate 10 and negative plate 20.
Embodiment 1
Once (namely positive plate 10 and negative plate 20 to be only provided with a V-arrangement) along the bending of pole piece length center line, concrete technology is described below:
The preparation of positive plate 10:
By LiCoO
2(cobalt acid lithium), Super-P (conductive carbon black), PVDF (poly-inclined fluorine resin) mix according to mass ratio 95: 2: 3 with NMP (N, N-dimethyl pyrrolidone) and stir and obtain anode sizing agent.By NMP adjusting viscosity in whipping process.Then slurry is coated on the two sides of the plus plate current-collecting body 1 (aluminium foil) of 14 micron thickness according to certain even width, coating adopts interval coating, and discontinuous coating, positive plate white space 3 (as shown in Figure 1) is reserved in the both sides of the double-edged length direction of aluminium foil during coating, horizontal white space 9 is reserved at the Width of aluminium foil one side, the width of horizontal white space 9 is 2mm ~ 5mm, cold pressing after anode sizing agent drying, then positive plate is bent into the V-shaped close to 180 ° by V-arrangement mould, bending edge is positive plate center line along its length, ensure that the positive plate of horizontal white space 9 after bending on Width is inner simultaneously, obtained positive plate 10.During positive pole coating, length direction reserves positive plate white space 3 is in order to reserved positive pole ear weld zone, it is be not more than negative electrode active material region, to prevent the generation of analysing lithium phenomenon in order to ensure positive active material region after anode pole piece bending that Width reserves horizontal white space 9.
The preparation of negative plate 20: Delanium, Super-P (conductive carbon black), CMC (water based adhesive, carboxymethyl cellulose), SBR (Styrene Butadiene Rubber rubber) are mixed according to mass ratio 94: 1: 2: 3 with deionized water and stir obtain negative pole coating sizing-agent.By deionized water adjusting viscosity in whipping process.Then slurry is coated on the two sides of the negative current collector 5 (Copper Foil) of 9 micron thickness according to certain width, remain for the negative plate white space 7 (as shown in Figure 2) welding negative lug 8 in advance in the both sides of the double-edged length direction of Copper Foil during coating, cold pressing after cathode size drying, then positive plate is bent into the V-shaped close to 180 ° by V-arrangement mould, bending edge is negative plate center line along its length, obtained negative plate 20.
Polypropylene porous film selected by barrier film 30.As shown in Figure 5, then the positive plate 10 after bending and negative plate 20 are intersected placements (i.e. in the V-shaped of one end insertion negative plate 20 of positive plate 10, the end of insertion near negative plate 20 center line along its length and and centerline parallel; Simultaneously, one end of negative plate 20 is inserted in the V-shaped of positive plate 10, the end of inserting near positive plate 10 center line along its length and and centerline parallel), make positive plate white space 3 relative with negative plate white space 7, and barrier film 30 is placed between positive plate 10 and negative plate 20, then be welded to connect by positive pole ear 4 by the positive plate white space 3 being positioned at V-shaped two ends, the negative plate white space 7 being positioned at V-shaped two ends is welded to connect by negative lug 8, obtains pole piece group;
Pole piece group volume pin is wound into battery core, battery core is placed in packaging bag, fluid injection, leave standstill, change into, obtain lithium ion battery after capacity.
The lithium ion battery of this structure can make pole piece resistance be reduced to original 1/2nd.
Certainly, positive plate can also be provided with multiple V-shaped, negative plate also can be provided with multiple (n) V-shaped, the V-shaped number that the V-shaped number that positive plate is provided with should be provided with negative plate is equal.The resistance of the lithium ion battery of this structure will be reduced to original n/mono-.
Comparative example 1
As different from Example 1: use conventional methods and prepare lithium ion battery, namely bending process is not carried out to positive plate and negative plate, but directly positive plate, negative plate and barrier film are carried out winding process after colding pressing, obtain electrode slice group.All the other, with embodiment 1, repeat no more here.
The lithium ion battery of embodiment 1 and comparative example 1 is tested as follows:
(1) discharge with the discharge-rate of 2C under the battery of embodiment 1 and comparative example 1 being placed in the low temperature environment of 10 DEG C, the discharge curve of both records, acquired results is shown in Fig. 7.
As shown in Figure 7, the voltage of the battery of comparative example 1 declines quickly when the large multiplying power of low temperature, namely the discharge voltage plateau of this battery declines too fast, obviously faster than the voltage drop of the battery of the embodiment of the present invention 1, this shows that the lithium ion battery adopting method of the present invention to prepare has the large multiplying power discharging property of better low temperature, can avoid the risk that battery is overheated.
(2) carry out loop test with the discharge-rate of the rate of charge of 1C, 1C under the battery of embodiment 1 and comparative example 1 being placed in the normal temperature environment of 25 DEG C, the cyclic curve of both records, acquired results is shown in Fig. 8.
As shown in Figure 8, under the same testing conditions, after 500 circulations, the capability retention of the battery of the embodiment of the present invention 1 reaches 90% more than, and the battery of comparative example 1 only has 80%.This shows that the lithium ion battery adopting the present invention to prepare has better normal-temperature circulating performance.
Meanwhile, measure the temperature rise of battery surface in cyclic process, result shows, the temperature rise of the battery of comparative example 1 reaches the height of 120 DEG C, and temperature rise of the present invention only has about 80 DEG C.
(3) battery of embodiment 1 and comparative example 1 is placed in the 2C curve of double curvature of test battery under the normal temperature environment of 25 DEG C, acquired results is shown in Fig. 9.
As shown in Figure 9, the lithium ion battery adopting method of the present invention to prepare has better high rate performance.
In sum, temperature rise when adopting method of the present invention can improve high rate performance and cycle performance, the high current charge-discharge of battery significantly, and solve battery discharge platform and to decline too fast problem, thus reduce the overheated risk of lithium ion battery.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also carry out suitable change and amendment to above-mentioned execution mode.Therefore, the present invention is not limited to embodiment disclosed and described above, also should fall in the protection range of claim of the present invention modifications and changes more of the present invention.In addition, although employ some specific terms in this specification, these terms just for convenience of description, do not form any restriction to the present invention.
Claims (7)
1. a preparation method for winding-structure lithium ion battery, is characterized in that, comprises the following steps:
The first step, the preparation of positive plate: be coated on by anode sizing agent on plus plate current-collecting body, reserves positive plate white space in the both sides of the length direction of plus plate current-collecting body during coating, colds pressing, be then bent into V-shaped after anode sizing agent drying;
The preparation of negative plate: be coated on by cathode size on negative current collector, reserves negative plate white space in the both sides of the length direction of negative current collector during coating, colds pressing, be then bent into V-shaped after cathode size drying;
Second step, positive plate after bending and negative plate are intersected and places, make positive plate white space relative with negative plate white space, and barrier film is placed between positive plate and negative plate, then the positive plate white space being positioned at V-shaped two ends is welded to connect by positive pole ear, the negative plate white space being positioned at V-shaped two ends is welded to connect by negative lug, obtains pole piece group;
3rd step, is wound into battery core by pole piece group, battery core is placed in packaging bag, fluid injection, leaves standstill, changes into, obtains lithium ion battery after capacity;
Described positive plate is when being coated with, and the both sides of plus plate current-collecting body Width are reserved with horizontal white space; The width of described horizontal white space is 2mm ~ 5mm, to guarantee that the rear positive active material region of anode pole piece bending is not more than negative electrode active material region, to prevent the generation of analysing lithium phenomenon.
2. the preparation method of winding-structure lithium ion battery according to claim 1, is characterized in that: the center line be bent to along positive plate length direction of described positive plate bends.
3. the preparation method of winding-structure lithium ion battery according to claim 1, is characterized in that: the center line be bent to along negative plate length direction of described negative plate bends.
4. the preparation method of winding-structure lithium ion battery according to claim 1, is characterized in that: described positive plate white space is arranged on the tow sides of positive plate; Described negative plate white space is arranged on the tow sides of negative plate.
5. the preparation method of winding-structure lithium ion battery according to claim 2, is characterized in that: described horizontal white space is arranged on the one side of positive plate, and during winding, described horizontal white space is relative with negative plate.
6. the preparation method of winding-structure lithium ion battery according to claim 1, is characterized in that: described positive plate is provided with multiple V-shaped, and described negative plate is provided with multiple V-shaped.
7. the preparation method of winding-structure lithium ion battery according to claim 6, is characterized in that: the V-shaped number that V-shaped number and negative plate that positive plate is provided with are provided with is equal.
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| CN103208613B (en) * | 2013-03-21 | 2017-04-12 | 东莞新能源科技有限公司 | Production method of anode plate in lithium ion batteries |
| CN111896879B (en) * | 2020-07-31 | 2023-06-06 | 北京石墨烯研究院 | Rapid detection method for bending life of flexible lithium ion battery |
| CN112038706B (en) * | 2020-10-09 | 2021-07-30 | 合肥国轩高科动力能源有限公司 | Lithium ion battery and roll core structure thereof |
| CN112038708B (en) * | 2020-10-10 | 2022-06-10 | 合肥国轩高科动力能源有限公司 | Lithium ion battery roll core structure and manufacturing method thereof |
| CN112670596B (en) * | 2020-12-16 | 2022-06-07 | 曙鹏科技（深圳）有限公司 | Battery cell, battery cell winding method and battery |
| CN115699398A (en) * | 2020-12-18 | 2023-02-03 | 宁德时代新能源科技股份有限公司 | Electrode assembly, method and system for manufacturing electrode assembly, battery cell, battery, and electric device |
| CN113823825A (en) * | 2021-08-29 | 2021-12-21 | 西北工业大学 | Battery cell, manufacturing method thereof, arc-shaped battery and battery module |
| CN113782811B (en) * | 2021-09-13 | 2023-02-28 | 宁德新能源科技有限公司 | Electric equipment and method for heating electrochemical device |
| CN113922002B (en) * | 2021-09-30 | 2023-08-22 | 珠海冠宇电池股份有限公司 | Battery cell |
| CN115133230B (en) * | 2022-07-15 | 2023-11-14 | 安徽国洁新能源科技有限公司 | Electrodeless ear cell manufacturing method for reel type cathode and anode end face welding current-conducting body |
| CN116190806A (en) * | 2023-02-28 | 2023-05-30 | 深圳市康胜新能源产品有限公司 | Lithium iron phosphate battery cell and battery cell processing technology |
| CN117317413A (en) * | 2023-08-04 | 2023-12-29 | 宁德时代新能源科技股份有限公司 | Wound electrode assembly, battery cell, battery and electricity using device |
| CN116864779B (en) * | 2023-09-01 | 2024-02-02 | 北京石墨烯技术研究院有限公司 | Battery core, button cell, and preparation method and application of button cell |
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| US9065145B2 (en) * | 2004-10-29 | 2015-06-23 | Medtronic, Inc. | Lithium-ion battery |
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| CN101485033A (en) * | 2006-05-15 | 2009-07-15 | 株式会社Lg化学 | Electrolyte assembly for secondary battery of novel laminated structure |
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