[1]The present invention is to manufacture the battery by then relates to a method of manufacturing a lithium secondary battery, and more particularly to injecting the electrode active material inside of the whole of the three-dimensional porous home pore provided inside the battery case, the rolling of said battery case it can, a separate electrode manufacturing process, a method of manufacturing a lithium secondary battery unnecessary.
[2]
This application claims the priority based on the Korea Patent Application No. 10-2017-0044955, filed on April 06, 2017, and all contents disclosed in the specification and drawings of that application are incorporated in this application.
BACKGROUND
[3]
High application ease according to the product line, the electric vehicle driven by only electric driving source as a lithium secondary battery, the portable device having an electrical characteristic, such as high energy density (EV, Electric Vehicle) or a hybrid vehicle (HV, Hybrid Vehicle), etc. It has been applied universally.
[4]
The lithium secondary battery as well as the primary advantage of reducing the use of fossil fuels dramatically attracting attention as a new energy source for environmentally friendly and energy efficiency in that the by-products of the use of energy does not occur at all.
[5]
Lithium secondary batteries with a device for producing electricity from each other are the positive electrode and the negative electrode reacts electrochemically, this secondary battery is a stacked structure according to the structure of the electrode assembly, the winding type (jelly roll-type) structure or a stacking / folding type structure including It can be classified.
[6]
Among them, the electrode assembly of the stacked structure is formed beforehand by laminating the prepared positive electrode, the separator prepared in advance, the previously prepared negative electrode in turn on these, and then cut to a predetermined size. The separator is disposed between each of the positive and negative electrodes.
[7]
On the other hand, in recent years the demand for high capacity, high output, and cost reduction of the lithium secondary battery, but increasingly there is a conventional battery manufacturing process is limited. In particular, to a high capacity and cost reduction to increase the loading amount of the electrode active material, and reduce the number of the electrode assembly stack. However, it problem of the electrode active material loading amount imbalance in the process development according to, and can result in defects in such electrode processes adhesion failure phenomenon of the electrode active material layer, in particular, the collector and the electrode active material, the output of the battery because of the distance increasing between the layers this characteristic is a problem and this phenomenon is generated extremely slow.
Detailed Description of the Invention
SUMMARY
[8]
Accordingly, the object of the present invention, omitting a separate electrode manufacturing process essentially go through in conventional battery manufacturing processes, which can solve the problems that can occur in the manufacturing process of the aforementioned high-capacity battery electrode lithium secondary to provide a method for manufacturing a battery.
Problem solving means
[9]
In order to solve the above problems, according to an aspect of the invention, (S1) the battery case a porous anode of a three-dimensional formed on one side of the internal current collector and contains the entire porous negative electrode current collector of a three-dimensional formed on the other side of the inside of the battery case, preparing a cell framework; (S2) implanting a positive electrode active material in the pores formed in the interior of the whole of the positive electrode collector, and injecting a negative electrode active material in the pores formed in the interior of the whole of the negative electrode current collector; And (S3) by applying pressure to the cell frame method for manufacturing a lithium secondary battery comprising the step of rolling is provided.
[10]
At this time, in the above (S1) phase, the cell framework, there may be further comprising a separator interposed between the positive electrode current collector and the anode current collector.
[11]
In addition, the battery case may be a pouch kaenil aluminum or aluminum.
[12]
Then, the whole of the positive electrode current collector and the anode current collector may be any one of a form of porous structure made of, respectively, the metal foam, a metal mesh and metal fiber.
[13]
On the other hand, the (S2) step, may be performed in a vacuum.
[14]
And, in the above (S2) step, the whole of the positive electrode current collector and the anode current collector may be one that is vibration.
[15]
And, in the above (S2) step, the positive electrode active material and the negative active material, respectively, may be injected in slurry form, or the binder is injected into the active form of the coating dry.
[16]
On the other hand, the (S3) step, may be a drying step of the impregnated positive electrode active material and the negative electrode active material is carried out with injection.
[17]
On the other hand, the lithium secondary battery may be a full-solid battery.
Effects of the Invention
[18]
Then, according to one embodiment of the invention, the injection of electrode active material on the inside of the whole of the three-dimensional porous home pore provided inside the battery case, by making the cell by rolling the battery case unnecessary, a separate electrode manufacturing process Therefore, it is possible to simplify the manufacturing process of the battery.
[19]
And, the three-dimensional porous collector is because the support serves to support the active material to overcome the structural limitations of the prior art electrodes, it is possible to manufacture a single-cell stack is a stack of a plurality of non-electrode assembly.
[20]
Furthermore, according to the present invention, it is possible to reduce the content of the binder used in the electrode active material.
Brief Description of the Drawings
[21]
Following figures attached to this specification is intended to illustrate preferred embodiments of the present invention, the components which serve to further understand the teachings of the present invention with the content of the above-described invention, the invention is only to details set forth in those figures is limited shall not be interpreted.
[22]
Figure 1 is a schematic view of the implanting each of the electrode active material to the entire three-dimensional porous electrode current collector according to an embodiment of the present invention.
[23]
Figure 2 is a schematic view of the step of rolling by applying pressure to the cell frame according to an embodiment of the present invention.
[24]
Reference Numerals
[25]
10: porous cathode current collector
[26]
11: positive electrode active material
[27]
20: Full porous anode current collector
[28]
21: negative electrode active material
[29]
30: separator
[30]
100: Battery Case
Mode for the Invention
[31]
With reference to the drawings the present invention will be described in detail. 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.
[32]
Accordingly, the configuration described in the examples and figures disclosed herein are merely nothing but the embodiment most preferred embodiment of the invention, a not intended to limit the scope of the present invention, a variety can be made thereto according to the present application point It should be understood that there are equivalents and modifications.
[33]
[34]
If a manufacturing method of a lithium secondary battery according to the present invention.
[35]
First, the cell frame including a battery case 100, a three-dimensional entire porous cathode current collector 10 in provided on one side of the inside and the battery case 100, a three-dimensional porous anode current collector 20 in provided on the other side of the internal It is prepared (S1 step).
[36]
Here, the battery case 100 has a role as a casing of a battery produced later, may be a pouch of aluminum or aluminum cans that are commonly used.
[37]
At this time, the inner surface of the battery case 100 may be a coating layer composed of non-conductive material coated.
[38]
In addition, the cell frame is interposed between the positive electrode collector 10 and negative electrode collector 20 may further include a separator 30 for preventing the short circuit between the anode and the cathode.
[39]
On the other hand, the three-dimensional porous cathode current collector 10 and the negative electrode collector 20 may be any of the forms of each of the metal foam, metal mesh, and a porous structure made of a metallic fiber.
[40]
At this time, there is a pore is formed in the entire interior of the porous current collector, at this time, the porosity of the whole of the current collector may be a 15 to 50%, more preferably 20 to 40%. By satisfying such a porosity, is filled with a suitable amount of an electrode active material porosity, it is possible to increase the electrode active material and the current collector contact surface area of ​​improving the electrical conductivity, and at the same time increasing the loading amount, may lower the resistance of the cell.
[41]
[42]
Then, the injection of a negative electrode active material 21, the pores formed in the positive electrode collector injecting a positive electrode active material 11, the pores formed in the interior of 10, and the anode current collector (20) (S2 step). 1 is a view showing an (S2) steps schematically.
[43]
In this case, the (S2) step, can be carried out in a vacuum, the cathode current collector 10 and the negative electrode collector 20 may be vibrated. As a result, the pores formed in the porous cathode current collector 10 and the anode current collector 20, the electrode active material can be more easily injected.
[44]
On the other hand, in the (S2) step, the positive electrode active material 11 and the negative electrode active material 21, respectively, may be injected in slurry form, or the binder is injected into the active form of the coating dry. When injected into the active material in the form of a dry state, than when injected in slurry form, the drying of the electrodes can be made more easily.
[45]
[46]
Then, the rolling pressure is applied to the cell frame (step S3). Figure 2 is a view of the (S3) Step As shown in Fig.
[47]
Through the above process, the positive and negative electrodes in the battery frame is complete and can be an electrode as a function, with a separator in between by being formed by the positive electrode and the negative electrode in close contact with each other, smooth exchange of lithium ions between the two electrodes to be It can be arranged so.
[48]
In this case, the (S3) step, may be one in which the columns are additionally applied to the said injection and the positive electrode active material by being performed with a drying step of the injection a negative electrode active material.
[49]
In addition, the (S3) step also, as in the above (S2) step, can be performed in a vacuum state, the cell frame can be oscillated. Thus the pores formed within the entire of the porous positive electrode current collector and negative electrode current collector is an electrode active material can be more easily injected.
[50]
Through this rolling step, the user and it is possible to manufacture the battery in a desired form.
[51]
After the (S3) step, by injecting a non-aqueous electrolyte of the electrolytic solution, etc. into the cell frame it can be completed by the cell. Moreover, this manufacturing process can also be used in the manufacturing process of the typical addition to the non-aqueous electrolyte lithium secondary battery using, all-solid battery, more specifically an inorganic all-solid battery.
[52]
The former if more details about the production method of the solid-state battery, in the process of making the electrode active material slurry, and followed by the addition of solid electrolyte in the slurry, can be prepared in the manner of injecting this slurry on the current collector, or the electrode active material was coated on a solid electrolyte, it is possible to manufacture a battery through the injection of an electrode active material in the dry state to the current collector and then heat-treated.
[53]
[54]
According to one embodiment of the present invention can omit a separate electrode manufacturing process is essential to go through in a conventional battery manufacturing process, it is possible to simplify the manufacturing process of the battery. Further, the electrode can be eliminated since the manufacturing process is omitted, the conventional high-capacity battery, a problem that may occur during the manufacturing process of the electrode, that is, the imbalance of the electrode active material loading amount, poor adhesion phenomenon of the electrode active material layer or the like.
[55]
Then, by using the whole of the three-dimensional porous home to overcome the structural limitations of the electrode, there is an advantage that the electrode assembly is a stack of cells producing a single stack of a plurality of non-available.
[56]
In particular, as to the entirety of the three-dimensional porous house by being used in the manufacturing method of the cell decreases the amount of binder used in the electrode active material, or, furthermore, even without a binder, by a support role of the porous current collector and the electrode active material, It has the advantage of fixing the electrode active material in the whole pores of the porous house.
[57]
[58]
The above description is only to those described as the technical idea of ​​the present invention by way of example, those skilled in the art that various modifications, additions and substitutions will be possible without departing from the essential characteristics of the present invention. Accordingly, the disclosed invention embodiments is for illustrative and not intended to limit the technical idea of ​​the present invention, not by such an embodiment is the technical scope of the present invention is not limited. The scope of protection of the invention is to be interpreted by the following claims, all spirits within a scope equivalent will be construed as included in the scope of the present invention.

Claims

[Claim 1](S1) preparing a cell frame containing a total porosity of the negative electrode current collector 3D 3D porous positive electrode current collector and provided on the other side of the inside of the battery case provided in one side in the battery case; (S2) implanting a positive electrode active material in the pores formed in the interior of the whole of the positive electrode collector, and injecting a negative electrode active material in the pores formed in the interior of the whole of the negative electrode current collector; And (S3) process for producing a lithium secondary battery comprising the step of rolling by applying pressure to the cell frame.
[Claim 2]
The method of claim 1, wherein in the step (S1), wherein the cell frame is A method for manufacturing a lithium secondary battery, characterized in that further comprising a separator interposed between the positive electrode current collector and the entire negative electrode collector.
[Claim 3]
The method of claim 1, wherein the battery case, a method of manufacturing a lithium secondary battery, characterized in that aluminum or an aluminum pouch kaenin.
[Claim 4]
The method of claim 1 wherein the production of the positive electrode current collector and the anode current collector is a lithium secondary battery, characterized in that either the form of one of a porous structure made of a metal, each foam, metal mesh, and metal fibers.
[Claim 5]
2. The method of claim 1, wherein (S2) is a step method for producing a lithium secondary battery, characterized in that is carried out in a vacuum.
[Claim 6]
The method of claim 1, wherein in the (S2) step, the cathode current collector and the anode current collector is method of manufacturing a lithium secondary battery characterized in that the vibration.
[Claim 7]
The method of claim 1, wherein in the (S2) step, the positive electrode active material and the negative electrode active material, production of a lithium secondary battery, characterized in that each injected in slurry form, or the binder is injected into the active form of the coating dry Way.
[Claim 8]
The method of claim 1, wherein the (S3) step, the injected positive electrode active material and the method for manufacturing a lithium secondary battery, characterized in that the drying step is carried out with the injection of a negative electrode active material.
[Claim 9]
The method of claim 1, wherein the lithium secondary battery A method for manufacturing a lithium secondary battery characterized in that the all-solid battery.