KR101732994B1 - Container for electric energy storage device and method of manufacturing the same, and electric energy storage device - Google Patents

Abstract

A container for an electric energy reservoir, a method for manufacturing the same, and a method for manufacturing the electric energy reservoir, which can simplify a complicated manufacturing process which is a main cause of an increase in manufacturing cost, present. A container for a proposed electrical energy reservoir comprises a first metal substrate of a flat plate, a second metal substrate penetrating the center portion and disposed above the first metal substrate, and a second metal substrate disposed between the first metal substrate and the second metal substrate And an insulating substrate having a central portion penetrated therethrough.

Description

Technical Field [0001] The present invention relates to a container for an electric energy reservoir, a method for manufacturing the container, and an electric energy storage device,

The present invention relates to a container for an electric energy reservoir, a method of manufacturing the same, and an electric energy storage device, and more particularly, to a metal-based container for an electric energy reservoir, a method of manufacturing the same, Device.

In recent years, with the development of electronic devices, household appliances, and industrial devices, electronic components have become more sophisticated, smaller, and lighter. As a result, diversification of electronic parts is required to make the parts more versatile.

As an example of this, the use of an electric energy storage device combining the functions of a secondary battery and a capacitor is increasing day by day. The electric energy reservoir is based on the electrostatic charge phenomenon occurring in the electric double layer formed at different interfaces.

In addition, the thickness of electronic products is becoming thinner due to the development of portable devices, communication devices, and the like, so that it is required to chip electronic components mounted in products.

Important technologies for manufacturing a chip-type electric energy reservoir include a technique for manufacturing a container for forming a chip form, an electrode accommodated in a container for realizing performance as an electric energy storage device, an electrolyte and a separator technology, And a technique of welding the sealing plate to encapsulate the electrode in the state that the electrode, the electrolytic solution and the separator are housed in the container in order to complete the cylinder.

An example of a conventional electric energy reservoir (Conventional Example 1) will be described below. 1 is a cross-sectional view showing an example of a container for a conventional electric energy reservoir, and Fig. 2 is a sectional view of an electric energy reservoir using the container of Fig.

The electric energy reservoir is formed by using the first ceramic substrate 11, the second ceramic substrate 12 and the third ceramic substrate 13 so that the first electrode pattern 14 and the second electrode pattern 16, The first internal electrode 30 and the second internal electrode 32 of polarized polarity separated from each other by the separator 36 and the ceramic container 10 which are formed so as to be spaced apart from each other, .

The first electrode pattern 14 is formed on the second ceramic substrate 12 laminated on the first ceramic substrate 11 and the second electrode pattern 14 is formed on the third ceramic substrate 13 .

The first internal electrode 30 is brought into contact with the first electrode pattern 14 through the adhesive layer 34 made of a conductive adhesive and the second internal electrode 32 is brought into contact with the metal layer 34 through the adhesive layer 34 made of a conductive adhesive. The sealing plate 28 of Fig. The second internal electrode 32 is in contact with the metal ring 24 which is in contact with the second electrode pattern 16 via the plating layer 26. [

An electrolytic solution (not shown) is impregnated in the first and second internal electrodes 30 and 32.

The first and second electrode patterns 14 and 16 on the top and bottom surfaces of the container 10 are formed by metal printing using a tungsten or molybdenum mixture. At this time, the connection terminals 20 of the first electrode pattern 14 and the lower surface are connected to each other by a via hole 18. The second electrode pattern 16 and the connection terminals 22 of the lower surface are connected to each other through a through hole. It is to be understood that the connection terminal 20 exposes the first electrode pattern 14 to the outside and the connection terminal 22 exposes the second electrode pattern 16 to the outside.

The container 10 includes a laminated structure of ceramic substrates 11, 12, and 13, which are basically composed of at least three ceramic sheets. Thus, the container 10 can be referred to as a ceramic base container.

In addition, the third ceramic substrate 13 forming the concave and the convex of the container 10 takes the form of a ring through which the central portion penetrates. A through hole for connecting the second electrode pattern 16 is formed on the side outer portion of the third ceramic substrate 13 as in the side outer edges of the first and second ceramic substrates 11 and 12. A metal ring 24 is metal-printed on the side surface of the third ceramic substrate 13 using a tungsten or molybdenum mixture so that the metal ring 24 can be joined by brazing.

Here, the first electrode pattern 14 to which external electrical energy is applied is formed by baking at a high temperature, plating the nickel base, and then gold plating. At this time, the gold-plated part is electrochemically stable and does not cause the redox reaction with the electrolytic solution. However, a porous structure is formed around the interface portion of the portion where the metal is not printed and plated on the ceramic substrate and the portion where the metal is printed and plated. The penetration of the electrolytic solution occurs at this portion, so that it comes into contact with the side surface or the interface of the nickel and the tungsten layer under the gold plating layer.

As a result, corrosion occurs due to electrochemical reaction progressively from the side of the electrolyte, nickel, and the tungsten layer or the interface with the interface. As a result, the electrolyte is deteriorated and the function as an electric energy storage element is lost.

3 and 4), a metal layer 38 made of a metal having a high corrosion resistance such as aluminum, stainless steel, The first electrode pattern 14 is formed on the outermost portion (A in Fig. 3) except for the center portion of the first electrode pattern 14, and after the ceramic is further coated and fired, gold plating is performed after nickel plating. Here, a portion where the ceramic is coated and fired is referred to as a ceramic coating layer 40.

However, it is only necessary to secure a sufficient thickness of the coating in order that the outermost portion (A in FIG. 3) except the central portion of the first electrode pattern 14 is coated with ceramics and fired to originally suppress the penetration of the electrolyte. Accordingly, there arises a problem that the internal volume of the ceramic must be reduced, and the penetration of electrolyte at the interface of the ceramic coating layer 40 facing the first electrode pattern 14 is difficult to prevent.

It is also possible to form a metal layer 38 made of a metal material having a high corrosion resistance such as aluminum, stainless steel or titanium on the first electrode pattern 14 in one or more layers and to form an outermost layer And the gold plating is performed after nickel plating is performed, resulting in an increase in manufacturing cost.

Further, since the thickness of the ceramic must be sufficiently secured in order to prevent the bending characteristic (camber) generated when the ceramics are baked, the space in which the internal electrodes are housed in the ceramic base container is narrowed by the formation of the additional metal layer, Should be made smaller. This causes a problem of reducing the capacity of the electric energy storage.

As a prior art related to the present invention, Korean Patent Registration No. 0892778 (electric energy storage element) is known.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art described above, and it is an object of the present invention to improve the problem of difficulty in thickness control of a conventional product and reduction of internal volume and to simplify a complicated manufacturing process A container for an electric energy reservoir, a method of manufacturing the same, and an electric energy reservoir.

According to an aspect of the present invention, there is provided a container for an electric energy reservoir, comprising: a first metal substrate; A second metal substrate penetrating the center portion and disposed on the first metal substrate; And an insulating substrate disposed between the first metal substrate and the second metal substrate, the center of the insulating substrate being penetrated.

The first metal substrate may be in contact with the first internal electrode.

The second metal substrate may be in contact with the sealing plate in contact with the second internal electrode.

A metal plating layer may be formed on the upper surface of the first metal substrate.

The insulating substrate may be formed of ceramic, and a metal plating layer may be formed on the upper surface and the lower surface of the insulating substrate.

A metal plating layer may be formed on the upper surface and the lower surface of the second metal substrate.

The first internal electrode, the separator, and the second internal electrode may be accommodated in the container.

The second metal substrate and the insulating substrate may have an annular shape.

According to a preferred embodiment of the present invention, there is provided a method of manufacturing a container for an electric energy reservoir, comprising the steps of: preparing a first metal substrate having a flat plate, an insulating substrate having a central portion penetrating the first metal substrate, Sequentially stacking the first metal substrate, the insulating substrate, and the second metal substrate; And bonding the first metal substrate, the insulating substrate, and the second metal substrate to each other.

The step of laminating may include stacking the second metal substrate after inserting the first metal substrate into the jig, inserting the insulating substrate, and stacking the second metal substrate.

The bonding step may be performed by brazing the first metal substrate, the insulating substrate, and the second metal substrate and bonding them together.

In the preparing step, the first metal substrate on which the metal plating layer is formed may be prepared.

The preparing step may include preparing the insulating substrate formed of ceramics, and forming a metal plating layer on the upper surface and the lower surface of the insulating substrate.

In the preparation step, the second metal substrate on which the metal plating layer is formed on the upper surface and the lower surface can be prepared.

According to a preferred embodiment of the present invention, there is provided an electric energy reservoir comprising a first metal substrate of a flat plate, a second metal substrate penetrating a central portion thereof and disposed above the first metal substrate, A container including an insulating substrate disposed between the two metal substrates, the center of the insulating substrate being penetrated; A first inner electrode and a second inner electrode housed in the container; And a sealing plate sealing the container.

The insulating substrate may electrically insulate the sealing plate from the first metal substrate.

A first lead terminal connected to the first metal substrate; And a second lead-out terminal joined to the sealing plate.

The polarities of the first internal electrode and the second internal electrode may be different from each other.

According to the present invention having such a constitution, by providing the metal base container of the electric energy reservoir, it is possible to improve the difficulty of the thickness control of the conventional product and the reduction of the internal volume. That is, electrochemical corrosion caused by the electrolyte generated in the first electrode pattern of the conventional electric energy storage device and the interface portion of the ceramic is solved, and the problem of capacity reduction due to the reduction of the internal storage space due to the additional metal layer, Thereby solving the problem of the cost increase due to the above-mentioned problems.

Further, a complicated manufacturing process, which is a major cause of a rise in manufacturing cost, can be simplified.

1 is a sectional view showing an example of a container for a conventional electric energy reservoir.
2 is a cross-sectional view of an electric energy reservoir using the vessel of FIG.
3 is a cross-sectional view showing another example of a container for a conventional electric energy reservoir.
4 is a cross-sectional view of an electric energy reservoir using the vessel of FIG.
5 is an exploded perspective view of a container for an electric energy reservoir according to an embodiment of the present invention.
6 is a combined state view of Fig.
7 is a flowchart illustrating a method of manufacturing a container for an electric energy reservoir according to an embodiment of the present invention.
8 is a cross-sectional view of a unit cell of an electric energy storage device according to an embodiment of the present invention.
9 is a view showing a structure in which lead terminals are connected to the unit cell of FIG.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail.

It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be interpreted in an ideal or overly formal sense unless explicitly defined in the present application Do not.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In order to facilitate the understanding of the present invention, the same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

FIG. 5 is an exploded perspective view of a container for an electric energy reservoir according to an embodiment of the present invention, and FIG. 6 is a combined state view of FIG.

A container for an electric energy reservoir according to an embodiment of the present invention includes a first metal substrate 50, an insulating substrate 60, and a second metal substrate 70. A container for an electric energy reservoir according to an embodiment of the present invention may be referred to as a metal base container.

The first metal substrate 50 is a flat-shaped substrate, and contacts the first inner electrode among the first inner electrode and the second inner electrode. Here, the first metal substrate 50 may be referred to as a base substrate.

The first metal substrate 50 may be formed to a thickness of about 0.1 to 10 mm using one conductive metal.

The material of the conductive metal for the first metal substrate 50 can be selectively used in consideration of the corrosion resistance to the electrolytic solution and the characteristic of easily forming the plating layer. For example, the first metal substrate 50 may be made of a material such as stainless steel, aluminum, aluminum alloy, titanium, tin, copper, or the like. Aluminum having a high corrosion resistance to an electrolytic solution is suitable. However, since it is difficult to form a plating layer due to the characteristics of aluminum, a stainless alloy material easy to form a plating layer can be used.

The insulating substrate 60 is for forming a storage space for accommodating the internal electrodes, the electrolytic solution and the separator, and may be formed in the form of a ring through the center portion. Here, the insulating substrate 60 is preferably formed of ceramic.

Thus, the insulating substrate 60 electrically insulates the sealing plate for finally sealing the container (i.e., the metal base container) from the conductive first metal substrate 50.

Metal plating layers 62 and 64 are preferably formed on the upper and lower surfaces of the insulating substrate 60 for bonding with the first and second metal substrates 50 and 70.

The insulating substrate 60 may be formed using at least one green sheet made of high temperature co-fired ceramics (HTCC) or low temperature co-fired ceramics (LTCC) Can be manufactured. That is, after one or more green sheets were punched out of the primary cavity, the tungsten paste was screen-printed and subjected to unit scribing, and then hydrogen (70%) and nitrogen (30%) sintering at a high temperature in a reducing atmosphere using a mixed gas. The sintered insulating substrate 60 is firstly plated with nickel and secondly plated with copper and silver. At this time, the alloy ratio of copper to silver is about 30% for copper (Cu) and about 70% for silver (Ag).

The second metal substrate 70 is in contact with the sealing plate where the second inner electrode contacts the first inner electrode and the second inner electrode.

The second metal substrate 70 may be formed of a metal such as Kovar alloy, Alloy 42 alloy, stainless alloy, Ni, nickel alloy, tungsten, titanium, aluminum, A conductive metal material such as copper (Cu), zinc (Zn), tin (Sn), iron (Fe), molybdenum (Mo), gold (Au), silver (Ag) and platinum .

The second metal substrate 70 has the same ring shape as that of the insulating substrate 60. At this time, the same metal plating layer 74 as the metal plating layer formed on the sealing plate is formed on the second metal substrate 70 for bonding with the sealing plate. Of course, the same metal plating layer 72 as the metal plating layer 64 is formed on the bottom surface of the second metal substrate 70 for bonding with the metal plating layer 64 formed on the upper surface of the insulating substrate 60.

In FIG. 5, the first metal substrate 50, the insulating substrate 60, and the second metal substrate 70 are formed into rectangular shapes. However, the shapes of the first metal substrate 50, the insulating substrate 60, and the second metal substrate 70 may be polygonal or circular .

7 is a flowchart illustrating a method of manufacturing a container for an electric energy reservoir according to an embodiment of the present invention.

First, a first metal substrate (a lower metal substrate) 50, an insulating substrate (a central ceramic substrate) 60, and a second metal substrate (upper metal substrate) 70 are prepared (S10).

Then, the insulating substrate 60 is laminated or aligned on the first metal substrate 50, and the second metal substrate 70 is laminated or aligned on the insulating substrate 60 (S20). In other words, after inserting the first metal substrate 50 into the carbon brazing jig and inserting the insulating substrate 60, the second metal substrate 70 is sequentially inserted and laminated.

Thereafter, the substrates 50, 60, and 70 are brazed in a reducing atmosphere using hydrogen gas for 3 hours while being maintained at a temperature of about 930 ° C. to 970 ° C. to fix and fix the substrates 50, 60, and 70 (S30).

 The bonded body fixed by this bonding is metal-plated to complete the metal base container.

A method other than the above-mentioned method may be a method using an additive agent. For example, a nickel plating layer is formed on the upper and lower surfaces of the insulating substrate 60. Then, the first metal substrate 50, the ferroelectric material for BAg 8, the insulating substrate 60, the ferroelectric material for BAg 8, and the second metal substrate 70 are laminated in this order on the carbon brazing jig. Thereafter, the substrates 50, 60, and 70 were brazed in a hydrogen atmosphere for 3 hours while being maintained at a temperature of about 930 ° C. to 970 ° C., and the fixed bonded body was metal-plated to complete the metal base vessel do.

The first ceramic substrate, the second ceramic substrate, and the third ceramic substrate are sequentially formed in the conventional manner. However, the method for manufacturing the container for the electric energy reservoir according to the embodiment of the present invention, The single metal substrate 50, the insulating substrate 60, and the second metal substrate 70 are separately prepared and brazed and bonded together in an aligned state.

On the other hand, since the thickness of the ceramic must be sufficiently secured in order to prevent the bowing characteristic (camber) generated when the ceramics are baked, the thickness of the bottom surface of the ceramic container must be increased . On the contrary, since the bottom surface of the metal base container of the embodiment of the present invention by the above-described manufacturing method uses a metal plate, a sintering process is not required and there is no warping characteristic due to brazing, Can be significantly reduced. In the embodiment of the present invention, the size of the receiving portion of the metal base container is much larger and the electrical capacity is much larger on the basis of the same outer size. Further, in the case of an element having the same capacity, the size of the completed electric energy reservoir can be remarkably reduced.

8 is a cross-sectional view of a unit cell of an electric energy storage device according to an embodiment of the present invention.

The unit cell of the electric energy storage device according to the embodiment of the present invention includes a metal base container (see Figs. 5 and 6), first and second polarized electrodes 80 and 82, a separator 86, (88).

The first and second internal electrodes (80, 82) are housed in a metal base container and impregnated with an electrolytic solution.

The first and second inner electrodes 80 and 82 are separated from each other by a separator 86. Here, the first internal electrode 80 may be an anode, and the second internal electrode 82 may be a cathode. The polarities of the first and second internal electrodes 80 and 82 may be reversed as described above.

The first inner electrode 80 is bonded to the metal plating layer 52 on the first metal substrate 50 via the adhesive layer 84a made of a conductive adhesive or the like. The second internal electrode 82 is bonded to the bottom surface of the sealing plate 88 via an adhesive layer 84b made of a conductive adhesive or the like.

The adhesive layers 84a and 84b may be formed on the first inner electrode 80 and the second inner electrode 82 or may be formed on the metal plating layer 52 and the sealing plate 88, respectively.

The sealing plate 88 finally seals the metal base container. The sealing plate 88 is made of a conductive metal. At this time, the material of the sealing plate 88 can be a Kovar. Then, the plating layer can be formed on the surface of the sealing plate 88 with the thickness of nickel being approximately 15 mu m.

On the other hand, the sealing plate 88 can form a nickel plating layer on the surface of the sealing plate 88 to increase the bonding strength with the second metal substrate 70 to a thickness of about 30 탆.

The structure of FIG. 8 as described above can be regarded as a unit cell constituting the electric energy storage device.

FIG. 9 is a view for explaining a case where an electric energy reservoir is realized by connecting a lead terminal to the unit cell of FIG. 8. FIG.

The lead terminal 90 is connected to the bottom surface of the first metal substrate 50 and the lead terminal 92 is connected to the top surface of the seal plate 88.

Here, the lead terminals 90 and 92 can be welded by laser welding, resistance welding, or the like.

The outgoing terminal 90 and the outgoing terminal 92 are spaced apart from each other.

9, the lead terminal 92 is connected to the upper surface of the sealing plate 88, but it may be connected to the side surface other than the upper surface of the sealing plate 88. [

Hereinafter, a method of manufacturing an electric energy storage device according to an embodiment of the present invention will be described.

The first internal electrode 80 is bonded to the upper surface (that is, the center of the upper surface of the metal plating layer 52) inside the center of the metal base container in order to accommodate the first internal electrode 80 in the center of the interior of the metal base container An adhesive layer 84a is formed. Here, the adhesive layer 84a uses liquid carbon paste (Carbon Paste). A predetermined amount is jetted onto the upper surface of the inside of the center of the metal base container by using a constant-volume injector to form an adhesive layer 84a. Thereafter, the first internal electrode 80 having a smaller size than the center inner space of the metal base container is contacted with the adhesive layer 84a, and the first internal electrode 80 is dried at a temperature of about 100 캜 for 3 hours.

An adhesive layer 84b for adhering the second internal electrode 82 to the sealing plate 88 is formed in order to accommodate the second internal electrode 82. [ Here, the adhesive layer 84b uses a liquid carbon paste. A predetermined amount is jetted onto the bottom surface of the sealing plate using a fixed-quantity injector to form an adhesive layer 84b. Thereafter, the second internal electrode 82 having a size smaller than or equal to the first internal electrode 80 is adhered to the adhesive layer 84b in contact with the adhesive layer 84b, and then dried at a temperature of about 100 DEG C for 3 hours.

Then, a first internal electrode 80 adhered to the upper surface of the center inside of the metal base container, a second internal electrode 82 adhered to the center bottom surface of the sealing plate 88, The electrolyte is impregnated using a constant-volume discharger.

Thereafter, the separator 86 is provided on the upper surface of the first internal electrode 80 bonded to the upper surface of the center of the metal base container, and the separator 86 is disposed on the upper surface of the sealing plate 86, (88) is placed on the metal plating layer (74) of the second metal substrate (70).

Then, the second metal substrate 70 and the sealing plate 88 are joined to each other by laser welding or resistance welding to complete the unit cell.

In the thus-completed unit cell, the lead terminals 90 are seated on the exposed bottom surface of the first metal substrate 50 and joined to each other by laser welding or the like, and the exposed upper surface of the sealing plate 88 And the lead terminals 92 are seated thereon and are joined to each other by laser welding or the like to complete the electric energy reservoir.

At this time, in consideration of bonding with the sealing plate 88, it is preferable to use a stainless alloy as the material metal of the lead terminals 90 and 92. [ Here, the lead-out terminal 90 is an example of the first lead-out terminal described in the claims of the present invention, and the lead-out terminal 92 is an example of the second lead-out terminal described in the claims of the present invention can do.

For the surface mounting of the completed electric energy reservoir, use gold plated after nickel plating with low electrical resistance.

(Explanation of Comparative Example)

Hereinafter, a comparison result between the embodiment of the present invention and the finished product of the conventional example 2 will be described.

As shown in the following Table 1, it was confirmed that the thickness deviation of the product was 0.09 mm due to the bending characteristics normally generated during the firing of the ceramic sheet during the process of manufacturing the conventional ceramic base container. It was confirmed that the thickness deviation of the product employing the metal base container of the present invention was 0.01 mm. Thus, it can be seen that the thickness characteristics of the product adopting the embodiment of the present invention are better.

  Item  Sample 1  Sample 2  Sample 3  Sample 4  Sample 5  Sample 6  Sample 7  Sample 8  Sample 9  Sample 10 Conventional Example 2  0.92  0.95  0.91  0.99  0.94  0.94  0.96  0.92  0.97  0.90 Example  0.91  0.90  0.90  0.91  0.91  0.91  0.90  0.91  0.90  0.91

Table 1 shows the results (unit: mm) of the thickness measurements of the finished product (3.2 mm width, 2.5 mm length, 0.9 mm thickness). The data in Table 1 are measured by a three-dimensional tool microscope in a noncontact manner, and the measurement error is ± 0.0001 mm.

On the other hand, in order to prevent the corrosion phenomenon due to the reaction with the electrolyte of the metal printing part (i.e., the first electrode pattern) inside the conventional ceramic base container, a metal layer having excellent corrosion resistance was added to the upper part of the metal printing part inside the ceramic base container . Thus, the internal volume of the conventional ceramic base container was reduced as compared with the internal volume of the metal base container according to the embodiment of the present invention, as shown in Table 2 below.

Item
                             Sample 1    Width (mm)     Length (mm)     Depth (mm) Volume (mm ³ )  Conventional Example 2       2.5       1.8      0.40      1.80  Example       2.2       1.9      0.55      2.299

Table 2 above shows the results of internal volume comparison, and the internal volume of the metal base container according to the present invention was about 27.7%.

The measurement data in Table 2 were measured by a three-dimensional tool microscope in a non-contact manner, and the measurement error was ± 0.0001 mm.

The electrical capacity of the finished product of Conventional Example 2 and the product of the example of the present invention were measured and compared. As a result, as shown in the following Table 3, the electrical capacity of the product of the example of the present invention, Which is about 20% ~ 25%.

  Item  Sample 1  Sample 2  Sample 3  Sample 4  Sample 5  Sample 6  Sample 7  Sample 8  Sample 9  Sample 10 Conventional Example 2  0.41  0.42  0.43  0.42  0.42  0.43  0.42  0.41  0.44  0.43 Example  0.52  0.50  0.52  0.49  0.51  0.51  0.51  0.50  0.50  0.53

Table 3 shows the results of comparing the measured values (· · hr) of the finished product (3.2 mm width, 2.5 mm length, 0.9 mm thickness).

In the measurement of Table 3, a PCB for electric capacity measurement was manufactured, each sample was fixed by heating reflow at 260 ° C, and each of the terminals for measurement was connected to a battery capacity measuring device to measure the electric capacity. At this time, the measurement was performed by applying a DC voltage of 3.3 V and a current of 10 mA for 90 minutes under a constant voltage condition, then discharging the battery at a constant current of 10 μA to measure the time of discharging from 3.3 V to 2.0 V, Respectively. The electrical capacity was calculated by the method of "electrical capacity (· · hr) = discharge current (㎂) × discharge time (hr)".

Therefore, by providing the metal base container of the electric energy reservoir according to the present invention described above, it is possible to improve the difficulty of controlling the thickness of the conventional product and the problem of reduction of the internal volume. In addition, a chip-type electric energy storage device having a simple assembly structure can be provided to simplify a complicated manufacturing process, which is a major cause of an increase in manufacturing cost.

As described above, an optimal embodiment has been disclosed in the drawings and specification. While specific terms have been employed herein, they are used for the purpose of describing the invention only and are not used to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

50: first metal substrate 52, 62, 64, 72, 74: metal plating layer
60: an insulating substrate 70: a second metal substrate
80: first internal electrode 82: second internal electrode
84: adhesive layer 86: separator
88: sealing plate 90, 92:

Claims (16)

A container for an electric energy reservoir in which a first inner electrode and a second inner electrode, which are respectively disposed at upper and lower portions of a separator and a separator, are located in an inner space and are sealed,
A first metal substrate of a flat plate on which the first internal electrode is mounted on an upper surface;
An insulating substrate laminated on the first metal substrate and bonded to the first metal substrate and having a central portion penetrating the first inner electrode, the separator, and a portion of the second inner electrode; And
And a second metal substrate which is connected to the upper portion of the insulating substrate and penetrates the center portion so that the remaining portion of the second internal electrode can be disposed, Container for electrical energy store. The method according to claim 1,
Wherein the first metal substrate is in contact with the first internal electrode through a conductive adhesive layer provided on an upper surface thereof. The method according to claim 1,
Further comprising a metallic sealing plate joined to an upper portion of the second metal substrate to seal the internal space,
A metal plating layer is formed on the bottom surface of the sealing plate,
The second internal electrode is brought into contact with the bottom surface of the sealing plate through the conductive adhesive layer,
And said second metal substrate is in contact with said sealing plate in contact with said second internal electrode. The method according to claim 1,
And a metal plating layer is formed on the upper surface and the lower surface of the second metal substrate. delete The method of claim 4,
And a metal plating layer is formed on the upper surface and the lower surface of the insulating substrate. A method of manufacturing a container for an electric energy reservoir in which first and second internal electrodes disposed on upper and lower portions of a separator and a separator are positioned and sealed in an inner space,
Preparing a first metal substrate of a flat plate, an insulating substrate penetrating the center portion, and a second metal substrate penetrating the center portion, respectively;
Sequentially stacking the first metal substrate, the insulating substrate, and the second metal substrate; And
And bonding the first metal substrate, the insulating substrate, and the second metal substrate to each other,
The preparing step may include an insulating substrate having a central portion penetrated therein so that a part of the first internal electrode, the separator, and the second internal electrode may be disposed therein, and a central portion so that the remaining portion of the second internal electrode may be disposed Wherein the second metal substrate is provided with a perforated second metal substrate. The method of claim 7,
Wherein the preparing step further comprises preparing a sealing plate joined to an upper portion of the second metal substrate to seal the inner space and having a metal plating layer formed on the bottom surface thereof,
Wherein the step of stacking comprises:
The sealing plate is further laminated on the second metal substrate,
Wherein the bonding step comprises bonding the sealing plates to each other on the second metal substrate. The method of claim 7,
Wherein the preparing comprises:
A metal plating layer is formed on the upper surface and the lower surface of the insulating substrate,
The bonding step may include:
Wherein the first metal substrate, the insulating substrate, and the second metal substrate are brazed and bonded to each other. The method of claim 7,
Wherein the preparing comprises:
Wherein the second metal substrate having the metal plating layer formed on the upper surface and the lower surface thereof is prepared. A first metal substrate of a flat plate, a second metal substrate penetrating the center portion and disposed on the first metal substrate, and an insulating substrate disposed between the first metal substrate and the second metal substrate and passing through the center portion The container to make;
A first inner electrode and a second inner electrode housed in the container; And
And a sealing plate of a metal material disposed on the second metal substrate and sealing the inside of the container,
Wherein the insulating substrate is provided with a separator for separating upper and lower spaces at a central portion of the insulating substrate, the first internal electrode is positioned at a lower portion of the separator, a portion of the second internal electrode is positioned at an upper portion of the separator,
Wherein the first internal electrode has a lower surface bonded to the first metal substrate by a conductive adhesive layer and an upper surface bonded to the separator,
The upper surface of the second internal electrode is adhered to the sealing plate by a conductive adhesive layer, the lower surface of the second internal electrode is in close contact with the separator,
And the remaining portion of the second internal electrode is disposed on the second metal substrate. delete The method of claim 11,
And a metal plating layer is formed on the bottom surface of the sealing plate. The method of claim 11,
A first lead terminal connected to the first metal substrate; And
And a second lead-out terminal joined to the sealing plate. The method of claim 11,
And a metal plating layer is formed on the upper surface and the lower surface of the second metal substrate. The method of claim 11,
Wherein a metal plating layer is formed on the upper surface and the lower surface of the insulating substrate.

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