KR101949931B1 - Electrochemical energy device having a plurality of cell areas and method of fabricating the same - Google Patents

Abstract

The present invention is characterized in that a plurality of cell regions are formed in one electrochemical energy element by using a sealing portion serving as a partition for partitioning a space so that two or more cell regions are formed between a conductor for a negative electrode and a conductor for a positive electrode, A plurality of battery cells can be formed at one time and can be divided into a plurality of battery cells and the plurality of battery cells can be electrically connected in series or in parallel, And a manufacturing method thereof.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrochemical energy device having a plurality of cell regions and a method of fabricating the same.

The present invention relates to an electrochemical energy device capable of charging and discharging electric energy by an electrochemical reaction and a method of manufacturing the same.

Energy-related technologies have been actively studied as the industry related to portable electronic devices is expanding due to the recent development of communication technology and semiconductor manufacturing technology, and the demand for development of alternative energy for environmental preservation and preparation for depletion of fossil fuels is actively studied . Among these energy-related technologies, a battery, which is a typical energy storage element, is at the center.

Lithium primary batteries in batteries have been widely applied because they are higher in voltage and higher in energy density than conventional aqueous solution batteries in terms of miniaturization and weight reduction. Such a lithium primary battery is mainly used as a main power source or backup power source for portable electronic devices. Another lithium secondary battery is an energy storage device capable of charging and discharging using an electrode material having excellent reversibility.

Lithium secondary batteries are manufactured in various shapes according to their applications. For example, the lithium secondary battery is manufactured by packaging in a cylindrical shape, a square shape, a pouch shape, or the like. Here, since the pouch-type secondary battery can be made lighter, the related art is continuously being developed. Generally, a pouch type lithium secondary battery includes a pouch type battery housing a electrode assembly in a pouch case having a space for accommodating an electrode assembly, sealing the pouch case to form a pouch bare cell, And attaching an accessory such as a protective circuit module to form a pouch core pack. However, such a pouch-type lithium secondary battery is also a factor that restricts the shape and size of the lithium secondary battery in terms of packaging, and in order to manufacture one lithium secondary battery, each lithium secondary battery must be manufactured by packaging it, There is a problem that it is difficult to apply it to various electronic products.

KR 10-2016-0001909 (Jul.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a method of manufacturing an electrochemical energy device in which a plurality of cell regions are formed in one electrochemical energy device, And a plurality of cell regions for dividing the plurality of battery cells and allowing a plurality of battery cells to be electrically connected in series or in parallel, and a method of manufacturing the same.

According to an aspect of the present invention, there is provided an electrochemical energy device including a plurality of cell regions, including: a positive electrode conductor; A positive electrode active material laminated on the positive electrode conductor; A negative electrode conductor disposed so as to face the positive electrode conductor so as to face the positive electrode active material; An electrolyte interposed between the positive electrode active material and the negative electrode conductor; And an upper space of the peripheral barrier rib and the peripheral barrier rib and partition walls dividing an inner space, the upper side of the barrier rib is in contact with the positive electrode conductor and the contact surface is closed, and the lower side of the barrier rib pattern is connected to the negative electrode conductor A sealing part formed to be in contact with the contact surface, the cathode active material and the electrolyte being provided in the spaces partitioned by the barrier rib pattern, respectively; And a control unit.

The negative electrode active material is disposed between the negative electrode conductor and the electrolyte and is provided in each of the spaces defined by the barrier rib pattern. And further comprising:

The negative electrode active material may be lithium metal or a lithium alloy.

In addition, the electrolyte is characterized in that an electrolyte solution or a polymer electrolyte is contained in the porous separation membrane or the non-woven separation membrane.

The sealing portion may include a bonding portion formed between the barrier rib pattern and the positive electrode conductor and between the barrier rib pattern and the negative electrode conductor, respectively; And further comprising:

The partition pattern forming the closed portion is characterized by being a joint portion formed by joining together a laminate film layer formed on the lower face of the conductor for positive electrode and a laminate film layer formed on the upper face of the conductor for negative electrode.

In addition, the barrier rib pattern is formed such that the width of the partition rib is larger than the width of the peripheral rib.

An insulating layer is formed on at least one of the upper surface of the positive electrode conductor and the lower surface of the negative electrode conductor.

The insulating layer is formed on only a part of the upper surface of the conductor for the positive electrode or a part of the lower surface of the conductor for the negative electrode.

The plurality of cell regions defined by the barrier rib pattern are not provided with an insulating layer such that a part of the upper surface of the conductor for the positive electrode or a part of the lower surface of the conductor for the negative electrode is exposed to the outside.

Further, on the upper surface of the positive electrode conductor, a guide groove having a width wider than an entrance width is formed concavely, and the negative electrode conductor is formed with convex portions so as to correspond to the shape of the guide groove.

A method of manufacturing an electrochemical energy device having a plurality of cell regions according to the present invention includes the steps of forming a barrier rib pattern formed on at least one of a conductor for a positive electrode and a conductor for a negative electrode and partitioned into a plurality of cell regions (SA10); (SA20) of arranging the cathode active material and the electrolyte in each of the plurality of cell regions so as to form a laminated structure; And the plurality of cell regions are sealed by allowing the positive electrode conductor and the negative electrode conductor to be coupled by the partition pattern so that the positive electrode conductor and the negative electrode conductor are opposed to each other, A step SA30 of forming a structure in which an electrolyte and a conductor for a negative electrode are laminated in order; And a control unit.

In step SA20, the positive electrode active material, the electrolyte and the negative electrode active material are arranged so as to form a laminated structure. In step SA30, a structure in which the positive electrode active material, the electrolyte, the negative electrode active material, Is formed.

The negative electrode active material may be lithium or a lithium alloy.

The method may further include forming an insulating layer on at least one of the positive electrode conductor and the negative electrode conductor before step SA10 or step SA30.

Further, before step SA10, a guide groove having an inner width wider than an entrance width is formed concavely on the upper surface of the anode-use conductor, and the anode-use conductor is formed with convex portions so as to correspond to the shape of the guide groove The method comprising the steps of:

An electrochemical energy device having a plurality of cell regions and a method of manufacturing the same according to the present invention is characterized in that a plurality of cell regions are formed in one electrochemical energy device, .

In addition, since one electrochemical energy device can be divided into several battery cells, productivity can be improved.

Also, since the divided battery cells are easily connected in series or in parallel, they can be applied to various electronic products.

1 is a cross-sectional view illustrating an electrochemical energy device having a plurality of cell regions according to an embodiment of the present invention;
FIG. 2 is a perspective view showing a state in which a barrier rib pattern is coupled to a conductor for a positive electrode or a conductor for a negative electrode according to the present invention. FIG.
3 is a cross-sectional view illustrating an electrochemical energy device having a plurality of cell regions according to another embodiment of the present invention.
4 is a perspective view showing that an insulating layer is formed on a conductor for a positive electrode and a conductor for a negative electrode according to the present invention.
5 is a top plan view of the electrochemical energy device of FIG. 4;
6 is a cross-sectional view illustrating a plurality of battery cells formed by cutting the electrochemical energy device of the present invention of FIG. 4 stacked and connected in parallel.
7 and 8 are a perspective view and a cross-sectional view of an electrochemical energy device having a guide groove and a protrusion according to an embodiment of the present invention.
FIG. 9 is a sectional view showing a plurality of battery cells formed by cutting the electrochemical energy element of FIG. 8 stacked and connected in series. FIG.
10 is a cross-sectional view illustrating a method of manufacturing an electrochemical energy device having a plurality of cell regions according to an embodiment of the present invention.
11 is a cross-sectional view illustrating a method of manufacturing an electrochemical energy device having a plurality of cell regions according to another embodiment of the present invention.
12 is a partial cross-sectional view showing that the laminate film layers forming the barrier rib pattern according to the present invention are thermally fused to form a closed portion.

Hereinafter, an electrochemical energy device having a plurality of cell regions of the present invention and a method of manufacturing the same will be described in detail with reference to the accompanying drawings.

[Example of electrochemical energy device]

FIG. 1 is a cross-sectional view illustrating an electrochemical energy device having a plurality of cell regions according to an embodiment of the present invention. FIG. 2 is a cross-sectional view illustrating a state where a barrier rib pattern is coupled to a conductor for a positive electrode or a negative electrode according to the present invention Fig.

As shown in FIGS. 1 and 2, an electrochemical energy device 1000 having a plurality of cell regions according to the present invention includes a positive electrode conductor 100; A cathode active material 200 laminated on the anode active material 100; A negative electrode conductor 400 disposed so as to face the positive electrode conductor 100 so as to face the positive electrode active material 200; An electrolyte 300 interposed between the positive electrode active material 200 and the negative electrode conductor 400; The upper part of the barrier rib pattern 510 including the peripheral barrier ribs 511 and the peripheral barrier ribs 511 and partitioning ribs 512 partitioning the inner spaces is in contact with the positive electrode conductor 100 The contact surface is sealed and the lower side of the barrier rib pattern 510 is in contact with the negative electrode conductor 400 to close the contact surface and the positive electrode active material 200 and the electrolyte 300 are separated from each other by spaces defined by the barrier rib pattern 510 (Refer to 500 in Fig. . ≪ / RTI >

The positive electrode conductor (100) is one of the elements constituting the outer shape of the electrochemical energy element, and can be formed of a material having excellent electrical conductivity, and can be a positive electrode collector. For example, the conductor 100 for a positive electrode may be formed of a metal plate such as stainless steel (STS), aluminum, nickel or silver, or may be formed of an alloy thereof.

The positive electrode active material 200 may be laminated on the lower surface of the positive electrode conductor 100 and may be integrally formed with the positive electrode active material 200 adhered to the positive electrode conductor 100 have. The cathode active material 200 may be an oxide of two or more components including at least one of lithium, nickel, cobalt, chromium, magnesium, strontium, vanadium, lanthanum, cerium, iron, cadmium, lead and manganese, ), Sulfide, fluoride, or a combination thereof. However, the present invention is not limited thereto. For example, the cathode active material may include at least two of cobalt, copper, nickel, and manganese, which are suitable for a lithium secondary battery capable of reversibly storing and releasing lithium, and may be at least one selected from the group consisting of O, F, S, P, And at least one non-metallic element selected from the group consisting of lithium-based compounds. In addition, the cathode active material 200 may be formed by bonding to a composite having a porous structure, and a composite having a porous structure may be impregnated with a liquid electrolyte, and an electrolyte may be present in the pores of the composite. The conductive material may include carbon black, ultrafine graphite particles, fine carbon such as acetylene black, nano metal particle paste, indium tin oxide (ITO) paste, etc. .

The negative electrode conductor 400 is one of the elements forming the outer shape of the electrochemical energy element together with the positive electrode conductor 100, and may be formed of a material having excellent electrical conductivity to be a negative electrode collector. The negative electrode conductor 100 may be formed of, for example, a metal material or a plate made of an alloy thereof. The negative electrode conductor 400 may be disposed to face the positive electrode conductor 100 and may be disposed below the positive electrode active material 100 and the positive electrode active material 200, Can be disposed. At this time, the negative electrode conductor 400 may be formed of a metal such as any one of Cu, Ni, stainless steel (STS), and alloys thereof, as well as an electrically conductive conductor. Or Al, Sn, Ag, Au, Mg, Zn, an alloy thereof, and SnO _x (0 <x? 2).

The electrolyte 300 is interposed between the positive electrode active material 200 and the negative electrode conductor 400 so that the electrolyte 300 is filled between the separated positive electrode active material 200 and the negative electrode conductor 400, (300) may contact the cathode active material (200) and the anode conductor (400). The electrolyte 300 may be formed in various ways and the movement of the ions between the cathode active material 200 and the anode conductor 400 is not directly affected by the contact between the cathode active material 200 and the anode conductor 400 It is possible to play the role of enabling. At this time, the electrolyte 300 may be a solid electrolyte 310. That is, the electrolyte 300 may be formed of a solid electrolyte 310 in a solid state, and may be easily manufactured. The solid electrolyte 310 may be, for example, a polymer electrolyte. The electrolyte matrix may be impregnated with a polymer matrix having a porous structure May be formed. The polymer matrix of the porous structure may be a separator made of polyethylene or polypropylene or a separator made of a nonwoven structure. The porosity of the polymer matrix of the porous structure may be 30% or more and 95% or less, preferably 45% or more and 90% or less.

Alternatively, the electrolyte 300 may be an electrolyte 320, and may be formed of a liquid electrolyte 320 so that the electrolyte 320 may completely contact the positive electrode active material 200 and the negative electrode conductor 400. have. Alternatively, the electrolyte 300 may be a gel polymer electrolyte including a cross-linkable material capable of thermally cross-linking and UV cross-linking to a liquid electrolyte 320. The electrolyte 300 may further include ceramic particles such as alumina, silica, magnesium oxide, magnesium hydroxide, and titanium oxide. The electrolyte 300 may include an electrolyte or a polymer electrolyte in the porous separator or the non-woven separator.

The sealing portion 500 may be a partition pattern 510 that can be partitioned into a plurality of cell regions and the upper side (upper surface) of the partition pattern 510 is coupled to the lower surface of the conductive body 100 for the anode The contact surface is sealed and the lower side (lower surface) of the barrier rib pattern 510 is brought into contact with the upper surface of the negative electrode conductor 400 so that the contact surface can be sealed. The barrier rib pattern 510 may include a peripheral partition wall 511 and a partition wall 512 disposed inside the peripheral barrier rib 511 to define an inner space. The peripheral barrier rib 511 is formed in a ring shape such as a quadrangle so as to be in contact with the peripheral portion 110 of the positive electrode conductor 100 and the peripheral portion 410 of the negative electrode conductor 400, The positive electrode active material 200 and the electrolyte 300 may be disposed. The partitioning partition 512 is disposed inside the periphery partitioning wall 511 and the partitioning wall 512 is formed in a lattice shape or the like and is coupled to the peripheral partitioning wall 511 so that the peripheral partitioning wall 512 Can be partitioned. That is, the barrier rib pattern 510 may include a plurality of spaces on the inner side of the peripheral barrier rib 511, and may include a plurality of spaces filled with the cathode active material 200 and the electrolyte 300, respectively. Thus, a plurality of cell regions can be formed by the barrier rib pattern 510. The sealing portion 500 is formed so as to close the contact surface in contact with the positive electrode conductor 100 and the negative electrode conductor 400 so as to surround the periphery of the positive electrode active material 200 and the electrolyte 300, Air, and foreign substances to the cathode active material 200 and the electrolyte 300 from the cathode active material 200 and the electrolyte 300, and may be formed of an insulating material. Thus, the positive electrode conductor 100, the negative electrode conductor 400, and the sealing portion 500 can form the overall shape of the electrochemical energy device of the present invention. That is, the positive electrode conductor 100 and the negative electrode conductor 400 themselves constitute the outer shape of the electrochemical energy element, and the outer conductor (100) and the negative electrode conductor (400) May be a terminal for electrical connection with an electric circuit or other electrochemical energy device. The positive electrode active material 200, the electrolyte 300 and the negative electrode conductor 400 may be stacked in this order so that their contact surfaces are in close contact with each other. The positive electrode active material 200, And the electrolyte 300 are formed to be in contact with the inner surface of the barrier rib pattern 510 forming the hermetically sealed portion 500 so as to be in contact with the inner surface of the conductor for positive electrode 100 and the conductor for negative electrode 400 and the barrier rib pattern 510 The positive electrode active material 200 and the electrolyte 300 may be filled in the respective spaces formed by the positive electrode active material 200 and the electrolyte 300.

According to an embodiment of the present invention, an electrochemical energy device having a plurality of cell regions of the present invention is formed such that a plurality of cell regions are formed in one electrochemical energy device, thereby forming a plurality of battery cells at one time can do. In addition, since one electrochemical energy element formed to have a plurality of cell regions can be divided into a plurality of battery cells, productivity can be improved.

In another embodiment, the electrochemical energy device includes an anode active material 600 interposed between the anode active material 400 and the electrolyte 300 and provided in the spaces defined by the barrier rib patterns 510, ; As shown in FIG.

3, the negative electrode active material 600 is provided in each space of the barrier rib pattern 510 forming the plurality of cell regions, and may be disposed between the negative electrode conductor 400 and the electrolyte 300 have. Thus, the positive electrode conductor 100, the positive electrode active material 200, the electrolyte 300, the negative electrode active material 600, and the negative electrode conductor 400 may be stacked in this order and their contact surfaces may be in close contact with each other . At this time, the negative electrode active material 600 may be stacked on the upper surface of the negative electrode conductor 400, and may be integrally formed with the negative electrode active material 200 adhered to the negative electrode conductor 400. In addition, the negative electrode active material 200 may be lithium metal or a lithium alloy. The negative electrode active material 200 may be formed of graphite, lithium, silicon, tin, silver, gold, aluminum, zinc, Alloy. The negative electrode active material 200 may be laminated on the upper surface of the negative electrode conductor 400 using a process such as printing, coating, sputtering, and electroplating.

The sealing portion 500 may include a bonding portion 520 formed between the barrier rib pattern 510 and the positive electrode conductor 100 and between the barrier rib pattern 510 and the negative electrode conductor 400; As shown in FIG.

The sealing portion 500 may be formed of the barrier rib pattern 510 and the bonding portion 520. The upper surface of the barrier rib pattern 510 may be sealed by the bonding portion 520 and the lower surface of the barrier rib pattern 510 may be bonded to the upper surface of the anode conductor 400. [ As shown in FIG. At this time, the bonding portion 520 may be formed in various forms such as an adhesive. The barrier rib pattern 510 is formed of a thermoplastic resin, and the upper and lower surfaces of the barrier rib pattern 510 are melted by thermal fusion, And may be formed as the bonding portion 520 by sticking to and bonding to the negative electrode conductor 400.

In another embodiment, the laminate film layer 120 formed on the lower surface of the positive electrode conductor 100 and the laminate film layer 420 formed on the upper surface of the negative electrode conductor 400 are bonded to each other, May be provided.

12, a laminate film layer 120, for example, in the form of a barrier rib pattern 510 is previously formed on the lower surface of the anode conductor 100, and similarly, The laminated film layer 420 may be formed in advance in the form of the barrier rib pattern 510 and the laminated film layers 120 and 420 may be melted and bonded to each other by thermal fusion. At this time, when the laminate film layers 120 and 420 are melted and solidified at the time of thermal fusion bonding, the joint portions 121 and 421 are formed, so that an integral sealing portion 500 can be formed.

In addition, the barrier rib pattern 510 may have a width greater than the width of the peripheral barrier rib 511.

The electrochemical energy device having a plurality of cell regions of the present invention may be formed to have a plurality of cell regions and cut along the middle portion of the partition wall 512 to form a plurality of battery cells. For this, as shown in FIG. 2, the width W2 of the partitioning wall 512 is formed to be wider than the width W1 of the peripheral partitioning wall 511, thereby facilitating the cutting. If the width of the partitioning ribs 512 is twice the width of the peripheral ribs, the width of the ribs surrounding each of the four cells may be the same after being cut and divided into a plurality of cells.

The insulating layer 700 may be formed on at least one of the upper surface of the anode conductor 100 and the lower surface of the anode conductor 400.

That is, since the positive electrode conductor 100 and the negative electrode conductor 400 can be formed of a material having high electrical conductivity, any of the positive electrode conductor 100 and the negative electrode conductor 400, At least one insulating layer 700 may be formed for electrical insulation. At this time, in the drawing, it is shown that the insulating layer 700 is formed on the upper surface of the conductor for a positive electrode 100 and the lower surface of the conductor 400 for a negative electrode. For example, the insulating layer 700 may be formed by coating an insulating polymer resin layer on the surfaces of the anode 100 and the cathode 400, or may be formed by coating the anode 100 and the cathode 400 may be oxidized to form an oxide film. Further, the insulating polymer resin layer forming the insulating layer 700 may be formed using a lithography-capable photoresist.

The insulating layer 700 may be formed on only a part of the upper surface of the anode 100 or only a part of the lower surface of the anode 400.

That is, the insulating layer 700 may be formed on the upper surface of the conductor 100 for a positive electrode or on the upper surface of the conductor 400 for a negative electrode, but may be formed only on a partial area not formed on each of the entire surfaces. Thus, when the insulating layer 700 is formed only on a part of the insulating layer 700 to form the plurality of battery cells, the battery cells having the insulating layer and the battery cells having no insulating layer can be formed together An insulating layer may be formed only on one side of the battery cells, or an insulating layer may be formed on both sides of the battery cells.

A plurality of cell regions A formed by the barrier rib pattern 510 are formed on the upper surface of the anode conductor 100 or a portion of the lower surface of the anode conductor 400 exposed to the outside, (700) may not be formed.

In other words, as shown in FIGS. 4 to 6, there is a portion where an insulating layer is not formed in one cell region A, and a portion where the insulating layer is not formed serves as an electrode terminal that can be electrically connected to an external electronic device . At this time, a portion where the insulating layer 700 is not present exists in one cell region A to be a battery cell, so that the conductor for a positive electrode 100 or the electrode for a negative electrode The surface of the body 400 may be used as an electrode terminal. As shown in FIG. 1, for example, the electrochemical energy device is cut to form a plurality of battery cells, the battery cells C are stacked, and the electrodes having the same polarity are connected to each other by using the bus bar B, The battery cells may be configured to be connected in parallel.

A guide groove 150 having an inner width Wi larger than an entrance width Wo is concavely formed on the upper surface of the positive electrode conductor 100. The negative electrode conductor 400 is provided with a guide groove The protrusions 450 may be formed to be convex so as to correspond to the shapes of the protrusions 150.

7 and 8, the guide groove 150 may be recessed downward from the upper surface of the anode 100. At this time, the guide groove 150 may be formed to have an entrance width Wo The inner width Wi of the concave inward portion can be formed wider. The protrusions 450 may be formed in the same shape corresponding to the shape of the guide groove 150. The protrusions 450 may protrude downward from the lower surface of the negative electrode conductor 400. Conversely, protrusions may be formed in the positive electrode conductor 100, guide grooves may be formed in the negative electrode conductor 400, or a plurality of guide grooves and protrusions may be formed.

As shown in FIG. 9, the electrochemical energy device is cut to form a plurality of battery cells, the battery cells C are stacked, and the plurality of battery cells are connected in series so that the electrodes of different polarities are in contact with each other. . At this time, the protrusion 450 is inserted into one side of the open side of the guide groove 150, and the protrusion 450 is inserted to slide to the other side of the guide groove 150, And the negative electrode conductor 400 of the other battery cell C can be brought into contact and coupled with each other. The plurality of battery cells C coupled in this way may not touch the contact surface between the positive electrode conductor 100 and the negative electrode conductor 400 when they are bent after they are coupled and when they are bent, Since the surfaces where the surfaces are slidable can be easily bent, electronic products requiring flexibility can be applied.

The cathode active material 200 may be primary particles or secondary particles that are aggregated or sintered. Further, the cathode active material 200 may further include a shell layer coated on the primary particle or secondary particle surface. The shell layer may comprise a metal, an oxide of the metal, a hydroxide, a hydride, a hydrocarbon, or a mixture thereof. The shell layer may have an amorphous, polycrystalline or mixed phase thereof, but the present invention is not limited thereto. The metal of the shell layer may be Mg, Al, Co, K, Na, Ca, Si, Ti, V, Sn, Ge, Ga, B, As, Zr or a mixture thereof. The shell layer may be formed by immersing and dispersing the constituent particles of the shell layer in a dispersion solvent in which the cathode active material is dispersed, or by spray-depositing the dispersion solvent. If necessary, a further process such as calcination or heat treatment may be performed.

In addition, the negative electrode active material 600 may be a carbon-based material such as low-crystalline carbon or high-crystalline carbon. The low-crystalline carbon may be, for example, a soft carbon or a hard carbon. The highly crystalline carbon may be, for example, natural graphite, Kish graphite, pyrolytic carbon, mesophase pitch based carbon fiber, mesocarbon microbeads, mesophase pitches, petroleum or coal tar pitch derived cokes. However, the materials of the active materials listed above are illustrative and the present invention is not limited thereto. The negative electrode active material may be a monomolecular magnetic material such as silicon, germanium, tin, lead, antimony, bismuth, zinc, aluminum, iron and cadmium having intercalating or deintercalating capacity of lithium ions, an intermetallic compound thereof, Based material. Further, in another embodiment, the negative electrode active material may include at least one of sodium, or other oxide, carbide, nitride, sulfide, phosphide, selenide and telemine suitable for an NaS battery. In addition, the negative electrode active material 600 may be formed by bonding to a composite having a porous structure, and the composite having a porous structure may be impregnated with a liquid electrolyte, and an electrolyte may be present in the pores of the composite. The anode active material 600 may include a conductive material. Examples of the conductive material include carbon black, ultrafine graphite particles, fine carbon such as acetylene black, nano metal particle paste, indium tin oxide (ITO) paste, and the like .

[Manufacturing method _ Example]

FIG. 10 is a cross-sectional view illustrating a method of fabricating an electrochemical energy device having a plurality of cell regions according to an embodiment of the present invention. FIG. 11 is a cross- Sectional view showing a manufacturing method of an energy element.

As shown in the drawings, a method of manufacturing an electrochemical energy device having a plurality of cell regions according to the present invention is formed on at least one of a conductor 100 for a positive electrode and a conductor 400 for a negative electrode, (SA10) forming a barrier rib pattern (510) for partitioning the barrier ribs (A); (SA20) of arranging the cathode active material (200) and the electrolyte (300) so as to form a laminated structure in each of the plurality of cells (A) regions; And the positive electrode conductor 100 and the negative electrode conductor 400 are coupled with each other by the partition pattern 510 so that the positive electrode conductor 100 and the negative electrode conductor 400 are opposed to each other, A step SA30 of forming a structure in which a plurality of cell regions A are sealed and the positive electrode conductor 100, the positive electrode active material 200, the electrolyte 300, and the negative electrode conductor 400 are laminated in order, ); . &Lt; / RTI &gt;

First, Step SA10 is a step of forming a barrier rib pattern 510 on at least one of the positive electrode conductor 100 and the negative electrode conductor 400. As shown in the figure, for example, two barrier rib patterns 510 may be formed so that the respective barrier rib patterns 510 are joined and bonded to one surface of the anode conductor 100 and one surface of the anode conductor 400. At this time, the barrier rib pattern 510 may be divided into a plurality of cell regions A by a barrier rib pattern 510 so as to have a plurality of spaces inside.

Step SA20 is a step of disposing the positive electrode active material 200 and the electrolyte 300 on the plurality of cell regions A so as to form a laminated structure. For example, as described above, The cathode active material 200 is filled in each space of the barrier rib pattern 510 formed on one surface and the electrolyte 300 is filled in each space of the barrier rib pattern 510 formed on one surface of the anode conductor 400, The positive electrode active material 200 and the electrolyte 300 may be laminated so that the contact surface is closely contacted when the positive electrode conductor 100 and the negative electrode conductor 400 are opposed to each other.

Step SA30 is a step in which the cathode active material 200 and the electrolyte 300 are disposed in the respective spaces forming the plurality of cell regions A so as to form a laminated structure, And the cathode conductor 400 are opposed to each other so that the barrier rib patterns 510 are opposed to each other so that the anode conductor 100 and the cathode conductor 400 are coupled by the barrier rib pattern 510 So that a plurality of cell regions A are sealed. At this time, each of the cell regions A is sealed by the barrier rib pattern 510, and the positive electrode active material 200 and the electrolyte 300 are arranged to form a laminated structure in each space, The positive electrode active material 200, the electrolyte 300 and the negative electrode conductor 400 are stacked in this order.

Here, when the barrier rib pattern 510 is formed only on one of the positive electrode conductor 100 and the negative electrode conductor 400, for example, when the barrier rib pattern 510 is formed only on the positive electrode conductor 100 The cathode active material 200 and the electrolyte 300 may be stacked in order on the inner space of the plurality of cell regions A formed by the barrier rib patterns 510 and then the cathode conductive material 400 may be coupled When the barrier rib pattern 510 is formed only on the negative electrode conductor 400, the electrolyte 300 and the positive electrode active material (not shown) are formed in the inner space of the plurality of cell regions A formed by the barrier rib pattern 510 200 may be laminated in this order, and then the positive electrode conductor 100 may be bonded. The electrolyte 300 may be a solid electrolyte 310 that is easy to form a laminate structure, but a liquid electrolyte or a gel electrolyte may be used in some cases.

In step SA20, the positive electrode active material 200, the electrolyte 300 and the negative electrode active material 600 are arranged so as to form a laminated structure. In step SA30, the positive electrode active material 100, the positive electrode active material 200, The electrolyte 300, the anode active material 600, and the anode conductor 400 are stacked in this order.

That is, in step SA20, the anode active material 600 may be further disposed. For example, as shown in FIG. 5B, on one surface of the conductor for a positive electrode 100 and one surface of the conductor for a negative electrode 400, The positive electrode active material 200 and the electrolyte 300 are sequentially filled in the respective spaces of the barrier rib patterns 510 formed on one surface of the positive electrode conductor 100 to form a laminated structure And the negative electrode active material 600 may be filled in each of the spaces of the barrier rib pattern 510 formed on one surface of the negative electrode conductor 400. At this time, the electrolyte 300 may be disposed on the anode 400 for the anode active material 600 and the electrolyte 300 to be stacked in order. The positive electrode current collector 100, the positive electrode active material 200, the electrolyte 300, the negative electrode active material 600, and the negative electrode collector 400 are bonded to each other so that the positive electrode conductor 100 and the negative electrode conductor 400 are opposed to each other. And the entire body 400 are laminated in order so that the contact surfaces are closely contacted with each other. The negative electrode active material 200 may be lithium or a lithium alloy.

The method may further include forming an insulating layer 700 on at least one of the positive electrode conductor 100 and the negative electrode conductor 400 before the step SA10 or after the step SA30.

That is, the insulating layer 700 may be formed on one surface of the anode 100 and the anode 400. For example, as shown in the figure, the anode 100 and the cathode 400 may be formed with an insulating layer 700. At this time, the insulating layer 700 may be formed on the opposite side of the surface on which the conductor for positive electrode 100 and the conductor for negative electrode 400 are opposed to each other.

A guide groove 150 having an inner width Wi larger than an entrance width Wo is concavely formed on the upper surface of the positive electrode conductor 100 prior to the step SA10 and the negative electrode conductor 400 The protrusion 450 may be formed to be convex so as to correspond to the shape of the guide groove 150.

That is, the guide groove 150 may be formed in the positive electrode conductor 100 and the protrusion 450 may be formed in advance in the negative electrode conductor 400, and the guide groove 150 and the protrusion 450 May be formed on the side opposite to the side where the conductor for positive electrode 100 and the conductor for negative electrode 400 face each other.

The barrier rib pattern 510 may be formed by fusion bonding or the like to the positive electrode conductor 100 and the negative electrode conductor 400 to form the bonding portion 520. The barrier rib pattern 510 and the bonding portion 520 And may be formed of the sealing portion 500. 12, the barrier rib pattern 510 may be formed of laminate film layers 120 and 420 integrally formed by laminating the positive electrode conductor 100 and the negative electrode conductor 400 to form the laminate film layers 420 and 420 may be melted to form the joints 121 and 421 and the joints 121 and 421 may be formed as the hermetic seal 500.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It goes without saying that various modifications can be made.

1000: Electrochemical energy element
100: positive electrode conductor 110:
120: Laminate film layer 121:
150: Guide groove
200: cathode active material
300: electrolyte 310: solid electrolyte
400: negative electrode conductor 410:
420: laminated film layer 421:
450: protrusion
500:
510: barrier rib pattern 511: peripheral barrier rib
512: partitioning bulkhead 520:
600: anode active material
700: insulating layer
A: cell area
B: Bus bar
C: Battery cell

Claims (16)

A positive electrode conductor;
A positive electrode active material laminated on the positive electrode conductor;
A negative electrode conductor disposed so as to face the positive electrode conductor so as to face the positive electrode active material;
An electrolyte interposed between the positive electrode active material and the negative electrode conductor; And
The upper side of the barrier rib pattern including the peripheral barrier ribs and the partition walls partitioning the inner spaces disposed inside the peripheral barrier ribs is in contact with the conductor for the positive electrode to seal the contact surface and the lower side of the barrier rib pattern contacts the negative electrode conductor A sealing portion that is hermetically sealed and has the cathode active material and the electrolyte formed in the spaces partitioned by the barrier rib pattern, respectively;
And,
There is no electrode tab extending outwardly from the peripheral partition wall in the conductor for positive electrode and the conductor for negative electrode,
An insulating layer is formed on at least one of the upper surface of the positive electrode conductor and the lower surface of the negative electrode conductor and an insulating layer is formed such that a part of the upper surface of the conductor for the positive electrode or a part of the lower surface of the conductor for the negative electrode is exposed to the outside However,
Wherein a portion where the insulating layer is not formed serves as an electrode terminal that can be electrically connected to an external electronic device or can be electrically connected to the battery cells.
The method according to claim 1,
A negative electrode active material interposed between the negative electrode conductor and the electrolyte and provided in the spaces partitioned by the barrier rib pattern; And a plurality of cell regions are formed on the substrate.
3. The method of claim 2,
Wherein the negative electrode active material is lithium metal or a lithium alloy.
3. The method according to claim 1 or 2,
Wherein the electrolyte comprises an electrolyte or a polymer electrolyte in a porous separator or a non-woven separator.
The method according to claim 1,
The sealing portion
A junction formed between the barrier rib pattern and the anode conductor and between the barrier rib pattern and the anode conductor; And a plurality of cell regions are formed on the surface of the substrate.
The method according to claim 1,
The barrier rib pattern forming the closed portion may include:
And a laminate film layer formed on a lower surface of the conductor for a positive electrode and a laminate film layer formed on an upper surface of the conductor for a negative electrode.
The method according to claim 1,
The barrier rib pattern,
Wherein a width of the partition wall is larger than a width of the peripheral barrier rib.
delete delete delete delete An electrochemical energy device having a single cell region produced by cutting along an intermediate portion of a partition wall of an electrochemical energy device having the plurality of cell regions.
A step (SA10) of forming a barrier rib pattern formed on at least one of a conductor for a positive electrode and a conductor for a negative electrode, the partition pattern being divided into a plurality of cell regions;
(SA20) of arranging the cathode active material and the electrolyte in each of the plurality of cell regions so as to form a laminated structure; And
The plurality of cell regions are sealed by allowing the positive electrode conductor and the negative electrode conductor to be coupled by the partition pattern so that the positive electrode conductor and the negative electrode conductor are opposed to each other and the positive electrode active material, And a conductor for a negative electrode are laminated in this order;
And,
Prior to step SA10,
A guide groove having a wider inner width Wi than the inlet width Wo is concaved on the upper surface of the positive electrode conductor so that the protruding portion is convexly formed on the negative electrode conductor so as to correspond to the shape of the guide groove The method of claim 1, wherein the plurality of cell regions or the single cell region comprises a plurality of cell regions or a single cell region.
14. The method of claim 13,
In step SA20, the positive electrode active material, the electrolyte, and the negative electrode active material are disposed to form a laminated structure,
In step SA30, a structure is formed in which a conductor for a positive electrode, a positive electrode active material, an electrolyte, a negative electrode active material, and a conductor for a negative electrode are stacked in this order. In the electrochemical energy device having a plurality of cell areas or a single cell area Gt;
15. The method of claim 14,
Wherein the anode active material is lithium or a lithium alloy. 2. The method of claim 1, wherein the anode active material is lithium or a lithium alloy.
14. The method of claim 13,
Before the step SA10 or after the step SA30,
And forming an insulating layer on at least one of the positive electrode conductor and the negative electrode conductor. The method of any one of claims 1 to 5,

Images