Art
[1]Mutual citations and related applications
[2]This application claims the benefit of priority based on the April 14, 2017 Korea Patent Application No. 2017-0048647 years, and all information disclosed in the literature of the Korea patent application are included as part of the specification.
[3]Art
[4]The present invention more particularly relates to an electrode assembly of the present invention relates to an electrode assembly capable of reducing the resistance.
BACKGROUND
[5]To generate electrical energy through a physical reaction or chemical reaction of the material cell is to supply power to an external (cell, battery), according to the living environment surrounded by various types of electrical and electronic devices, fail to obtain the AC power supplied to the building If you will be using, if necessary, or DC power.
[6]In such cells there from chemical reaction cell of a primary cell and a secondary battery using a commonly widely used, the primary cell is a consumable battery to be collectively referred to as batteries. Further, the secondary battery when the oxidation-reduction process between the current and the material number repeatable as a rechargeable battery which is made using a material, the reduction for the material carried by the current power is being filled, the oxidation of the material When the power is performed there is a discharge, this charge-discharge is repeatedly performed while electricity is generated is presented.
[7]On the other hand, the secondary battery of lithium ion battery has a plurality of times in the form of a cylinder naejineun approximately jelly roll (jelly roll) to ensure that there is interposed a separator between the positive electrode conductive foil and each coated with the active material at a predetermined thickness on the cathode conductive foil, wherein the amount of the conductive foil, Issues accommodating an electrode assembly produced by taking a cylindrical or rectangular can, a pouch or the like and is produced by the sealing process it.
[8]
Republic of Korea Laid-Open Patent Publication No. 10-2012-0006389 discloses a secondary battery comprising an electrode assembly of the prior art and it is disclosed.
[9]
A conventional secondary battery is the structure in which the positive electrode tab and negative electrode tab respectively formed two by two, such a structure there is a limit to reduce the resistance.
[10]
However, there is a need for development of a low-resistance secondary battery increases as the market changes, such as the development of electric vehicles, compact and portable (portable) screen of home appliances.
Detailed Description of the Invention
SUMMARY
[11]
Therefore, the present invention is conceived by the above needs, such as, object of the present invention is to provide an electrode assembly to minimize the electrical resistance by adding a tab on the electrode pattern.
Problem solving means
[12]
The electrode assembly according to an embodiment of the present invention, the expanding the wound state of the electrode current collector-like holding the active material is applied to the portion and the electrode collector a portion solid non-active material is coated on the current collector longitudinal the electrode and the tab member and the entire width direction of the current collector formed on the uncoated portion having along and extending from the holding portion, characterized in that it comprises a foil tab, the active material is not coated.
[13]
The foil tabs can be formed from one or more of the holding portion.
[14]
The foil tabs can be formed of 1-10 parts.
[15]
The length of the foil tab may be 5mm ~ 16mm.
[16]
The width of the foil tabs can be 2mm ~ 120mm.
[17]
When winding the electrode, the foil tabs can be formed on the electrode such that a plurality pieces toward the outside of length increases from the center of the winding wound around the electrode.
[18]
The solid portion may be formed on both ends of the electrode.
[19]
The coated portion is formed on both ends of the electrode has the tab member can be formed.
[20]
The foil tabs can be formed by notching (notching) or punching the electrode.
[21]
The electrode may be a cathode or an anode.
Effects of the Invention
[22]
In accordance with the present invention, there is an effect to maximize the number of electrode tabs to minimize resistance.
[23]
According to the present invention, a plurality of electrode tabs different from the length of the take-up inside and outside there is an effect that facilitates electrical contact with the can member.
[24]
In accordance with the present invention, there is an effect while preserving the capacity to lower the resistance since the plurality of electrode tabs are formed extending from the holding portion of the current collector.
Brief Description of the Drawings
[25]
1 is a developed view of a development electrode of the electrode assembly according to an embodiment of the present invention.
[26]
2 is a developed view of a development electrode of the electrode assembly according to another embodiment of the present invention.
[27]
3 is a developed view of a development electrode of the electrode assembly according to still another embodiment of the present invention.
[28]
Figure 4 is a perspective view showing an electrode assembly according to one embodiment of the invention the wound state.
[29]
Figure 5 is a bottom view of FIG.
[30]
6 is a side view of Fig.
Best Mode for Carrying Out the Invention
[31]
Will be described in detail with respect to the electrode assembly according to a preferred embodiment that follows, the present invention will be described with reference to the accompanying drawings.
[32]
Herein and in the terms or words used in the claims is general and not be construed as limited to the dictionary meanings are not, the inventor can adequately define terms to describe his own invention in the best way on the basis of the principle that the interpreted based on the meanings and concepts corresponding to technical aspects of the present invention. Accordingly, the configuration shown in the examples and figures disclosed herein are in not intended to limit the scope of the present is merely a preferable embodiment of the present invention invention, a variety that can be made thereto according to the present application point it should be understood that there may be equivalents.
[33]
Size of the particular portion to be combined with each component or components in the drawings are exaggerated, omitted for the purpose of convenience or clarity, or was schematically illustrated. Therefore, the size of elements does not utterly reflect an actual size. If a detailed description of known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention, such explanation will be omitted.
[34]
[35]
1 is a developed view of a development electrode of the electrode assembly according to an embodiment of the present invention.
[36]
The electrode assembly according to the invention the active material on the entire expanding the wound state, the active material is (a) applied to the surface of the current collector-holding portion 110 and the current collector (a) As shown in Figure 1 is electrodes provided along the length of the whole of the current collector the coated portion 120 is not coated (100), the uncoated portion 120, the tab member 121 and the holding in a width direction of the whole of the current collector is formed in part extending from 110 and the active material (a) comprises a foil tab (111) is not coated.
[37]
[38]
Electrode may be an electrode assembly manufactured by stacking a plurality of times a positive electrode, a negative electrode and a separator so that the separator is interposed between any may be one, the positive electrode and the negative electrode of the negative electrode of the positive electrode active material is coated with the positive electrode and the negative electrode active material is applied.
[39]
And the electrode assembly may be manufactured by winding a laminated body by laminating the positive electrode and the separator and the negative electrode in a jelly roll form.
[40]
The positive electrode may include aluminum electrode collector may be, as the cathode active material coated with the positive electrode holding part, that is the positive electrode uncoated positive electrode active material is not coated parts.
[41]
The positive electrode active material is LiCoO 2 , LiNiO 2 , LiMnO 2 , LiMnO 4 may be a lithium-containing chalcogenides or lithium transition metal oxide compound such as a knife.
[42]
Positive electrode holding portion, for example, an aluminum current collector, and a part of the entire at least one surface of the formed by coating a positive electrode active material, a positive electrode active material uncoated with the remainder of the total aluminum current collector may be added to positive electrode uncoated.
[43]
The cathode may be a copper current collector, a negative electrode active material is applied to the cathode holder and the cathode active material, negative electrode uncoated unpainted may include a.
[44]
Negative electrode active material, may be a crystalline carbon, amorphous carbon, carbon composite material, carbon materials such as carbon fiber, lithium metal or a lithium alloy.
[45]
Negative electrode holding portion, for example, and formed by coating a negative electrode active material on a portion of at least one surface of a copper current collector, a negative electrode active material a non-rest of the whole coated copper current collector could be negative electrode uncoated portion.
[46]
Membrane, for example, polyethylene (PE), polystyrene (PS), polypropylene (PP) and polyethylene (PE) and polypropylene (PP) copolymer either one of the base material is selected from the group consisting of (co-polymer) of the polyvinylidene fluoride flows can be prepared by coating the flow hexafluoro propylene copolymer (PVDF-HFP co-polymer).
[47]
Thus, the electrode 100 of the present invention may be at least one of a positive electrode, a negative electrode to form an electrode assembly, can be reduced more in particular the resistance necessary either in the positive or negative electrode.
[48]
Electrode 100 are each coated portion 120 is formed on both end portions of each is formed, the electrode 100 is coated portion 120 on the both ends may be attached to the tab member 121.
[49]
2 is a developed view of a development electrode of the electrode assembly according to another embodiment of the present invention, Figure 3 is a developed view of a development electrode of the electrode assembly according to still another embodiment of the present invention.
[50]
2 to 3, the various embodiments according to the example the electrode 100 of the present invention is formed of the coated portion 120 at both ends, one end of the uncoated portion of the coated portion 120 of the opposite ends (120 ) When the tab member 121 is attached to the uncoated portion 120 in the other end, the current collector is extended may form a tab member 121.
[51]
[52]
There foil tabs 111 can be formed as the notching (notching) or punching out (打 拔) the electrode 100 so as to extend in the width direction from the holding portion 110 of the electrode 100, that is, the electrode 100 by taking the cutting (cutting) by knife, laser, or the like, or press or the like can be molded.
[53]
Foil and tab 111 may not be coated are formed to extend only the current collector in the holding section 110, the area active material (a) of the electrode 100.
[54]
This foil tab 111 is active (a) in the holding portion 110, the area of ​​the holding unit may 110 be formed by removing only the active material (a) in, or electrode 100 extends from the electrode 100 is holding that is not coated may be formed to extend only the current collector.
[55]
Foil and tab 111 is formed to extend from the at least one holding part 110 can be to maximize the number of electrode tabs. The number of the foil tabs 111 increases, resistance of the electrode tab is reduced.
[56]
The number of the foil tab 111 may be formed to between 1-10.
[57]
The width of the foil tabs 111 can be formed without a 2mm ~ 120mm affect the size of the electrodes to optimize the size of the foil tabs 111 and minimizes the resistance.
[58]
The length of the foil tab (111) is good to form a 5mm ~ 16mm, The reason for this is that the length of the foil tab and the length of 111, it is difficult to electrically contact with the less than 5mm can member foil tab 111 16mm If, because due to the length required for at least the electrical contact member and can be a waste of raw material costs and take up too much space in the can exceeds member.
[59]
[60]
4 is a perspective view showing an electrode assembly according to one embodiment of the invention the take-up state, Figure 5 is a bottom view of Figure 4, Figure 6 is a side view of Fig.
[61]
As shown in FIG. 1 to FIG. 6, when the electrode assembly according to the present invention is wound around the electrode 100, the foil tab 111 to the electrode such that toward the outside from the center of the wound electrode 100 length is increased It may be formed of multiple pieces.
[62]
That is, the electrode 100 of the cathode electrode 100 is wound around the foil tabs 111, because the foil tab (111) in the wound state is bent in a bottom center direction of the can member connected to the bottom surface and electrically of the can member long length formed in the outer side toward the can facilitate the electrical connection with the can member.
[63]
[64]
According to the invention as described above, there is an effect to maximize the number of electrode tabs to minimize resistance.
[65]
According to the present invention, a plurality of electrode tabs different from the length of the take-up inside and outside there is an effect that facilitates electrical contact with the can member.
[66]
In accordance with the present invention, there is an effect while preserving the capacity to lower the resistance since the plurality of electrode tabs are formed extending from the holding portion of the current collector.
[67]
[68]Has been described with reference to the drawings illustrating an electrode assembly according to the invention as described above, the present invention is not limited by the embodiments and drawings described above, conventional in the art within the claims the various embodiments are possible by those with knowledge.

Claims
[Claim 1]
Expanding the wound state, onto the current collector electrode active material (a) is applied to the holding part 110 and throughout on said current collector electrode active material (a) of the entirety of the current collector the coated portion 120 is not coated length electrodes provided along a direction (100); Tab member 121 is formed in the coated portion 120; And wherein the current collector in the entire width direction of the extending from the holding portion 110, the active material (a) foil tab (111) is not applied; The electrode assembly comprises a.
[Claim 2]
The method according to claim 1, wherein the foil tab 111. The electrode assembly as being formed from one or more of the holding portion 110. The
[Claim 3]
The method according to claim 2, the electrode assembly characterized in that the foil forming the tabs 111 is 1-10 parts.
[Claim 4]
The method according to claim any one of claim 1 to claim 3, electrode assembly of length characterized in that the 5mm ~ 16mm of the foil tab (111).
[Claim 5]
The method according to claim 1, the electrode assembly is characterized in that the width 2mm ~ 120mm of the foil tab (111).
[Claim 6]
The method according to claim 1, when the take-up of the electrode 100, the foil tab (111) is characterized in that formed on the electrode pieces plurality such that toward the outer length is increased from the winding center of the winding the electrode 100 electrode assembly.
[Claim 7]
The method according to claim 1, wherein the uncoated portion 120 is an electrode assembly, characterized in that formed on both ends of the electrode 100.
[Claim 8]
The system according to claim 7, in the electrode assembly, characterized in that each of which the tab member 121 is formed in the coated portion 120 is formed on both ends of the electrode 100.
[Claim 9]
The method according to claim 1, wherein the foil tab 111 is an electrode assembly, characterized in that is formed by notching (notching) or punching to the electrode 100.
[Claim 10]
The method according to claim 1, wherein the electrode 100 is an electrode assembly, characterized in that the cathode or the anode.