KR20170095598A - Cell outer case for electric energy storage device module, and electric energy storage device module having the same - Google Patents

Abstract

The present invention relates to a cell outer case for an electric energy storage device module, and the electric energy storage device module including the same. The present invention provides the cell outer case (B) for an electric energy storage device module, including a housing (100) in which a plurality of cell elements (A) are embedded, wherein the housing (100) includes a plurality of cell receiving parts (S1-S6) receiving each cell element (A), and the electric energy storage device module including the same. According to the present invention, the manufacturing process (modular assembly process) of the electric energy storage device module is simplified and the manufacturing costs (production unit costs) are reduced. A weight thereof is reduced.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cell outer case for an electric energy storage device module, and an electric energy storage device module including the same. BACKGROUND OF THE INVENTION [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cell outer case for an electric energy storage device module, and an electric energy storage device module including the same. More particularly, the present invention relates to an improvement of a manufacturing process (assembling process) And an electric energy storage device module including the electric energy storage device module.

BACKGROUND ART [0002] Electric energy storage devices capable of charging / discharging, for example, capacitors as electrochemical devices and lithium-ion (Li ⁺ ) batteries are widely used in various industrial fields. For example, an electric double layer capacitor (EDLC) has a high energy density and is less in deterioration due to repetition of charging and discharging, requiring little or no maintenance. Accordingly, electric double layer capacitors (EDLC) are mainly used as an auxiliary power source for various electric and electronic devices, an IC backup power source, etc. Recently, toys, industrial power supplies, uninterruptible power supply (UPS), solar energy storage, HEV / POWER and so on.

2. Description of the Related Art Generally, an electric energy storage device such as an electric double layer capacitor (EDLC) is used by modulating a plurality of unit cells in series and / or parallel so as to have an appropriate voltage. Each of the unit cells includes a cell element and a cell enclosure for embedding the cell element. The cell element includes two electrodes of an anode and a cathode, and a separator of a porous material interposed between the two electrodes to allow only ion movement and prevent short-circuiting (insulation).

Generally, the electrode constituting the cell of the electric double layer capacitor (EDLC) is mainly composed of porous activated carbon as an electrode active material, and specifically, an activated carbon electrode composition (slurry) containing activated carbon, a binder, A metal foil (Al foil) or other metal current collector is coated and rolled.

In addition, the above-described cell elements, that is, the electrodes (anode and cathode) and the separator are embedded in the cell casing and impregnated with the electrolyte solution. The cell outer case has a cylindrical or square outer shape and is made of a metal material in consideration of mechanical strength, thermal strength, chemical resistance, and the like. In most cases, the cell case is made of aluminum (Al) material which is advantageous in terms of price and processability.

For example, Korean Patent No. 10-0967504, Korean Patent No. 10-1462155, Korean Patent No. 10-1527126, Korean Patent Publication No. 10-2011-0131250, Japanese Patent Laid-Open No. 2007-66530 And Japanese Laid-Open Patent Application No. 2007-87704 and the like.

In modularizing a cell such as an electric double layer capacitor (EDLC), a plurality of such unit cells are housed in a module container, and a plurality of unit cells are connected in series and / or parallel to a bus bar . For example, Korean Patent Publication No. 10-2013-0093697 and Korean Patent Publication No. 10-2014-0122537 disclose a capacitor module related to the above.

However, the electric energy storage device module according to the related art has at least the following problems.

First, since the plurality of unit cells are housed in the module container as independent elements, short-circuiting may occur between unit cells when shaking occurs. Such a short circuit can be exacerbated when it is mounted on equipment which generates a lot of vibration or impact such as automobile or heavy equipment. Accordingly, there is a problem that fixing means for fixing the unit cells are required. For example, in Korean Patent Laid-Open Publication No. 10-2013-0093697, a cell fixture is installed in the module container as the fixing means to fix the cells.

In addition, since the plurality of unit cells are individually housed and installed in the module container, the number of storing processes increases in proportion to the number of unit cells. Among other things, the module according to the related art includes the cell casing for incorporating each cell element in each unit cell as described above, so that the total number of components and the number of assembly processes are large. As a result, at least the weight is increased and the manufacturing process (modularization process) of the module is complicated.

In addition, each of the cell outer cases is made of a metal material such as aluminum (Al), which makes it difficult to reduce the weight of the electric energy storage device module. This becomes worse as the capacity and capacity of the electric energy storage device module increases or as the number of cells increases.

On the other hand, in some cases, attempts have been made to fabricate a cell outer case made of a resin material such as polyethylene (PE) or polypropylene (PP) in order to reduce the weight of the cell case. However, in this case, the mechanical strength, heat resistance and chemical resistance There was a difficulty in commercialization (commercialization).

Korean Patent No. 10-0967504 Korean Patent No. 10-1462155 Korean Patent No. 10-1527126 Korea Patent Publication No. 10-2011-0131250 Japanese Laid-Open Patent Application No. 2007-66530 Japanese Patent Application Laid-Open No. 2007-87704 Korean Patent Publication No. 10-2013-0093697 Korean Patent Publication No. 10-2014-0122537

Accordingly, it is an object of the present invention to provide a cell casing for an improved electric energy storage device module and an electric energy storage device module including the same.

More specifically, the present invention relates to a cell outer case for an electric energy storage device module capable of improving the manufacturing process (modular assembling process) of the electric energy storage device module, reducing weight, and / or improving electrical characteristics, An object of the present invention is to provide an electric energy storage device module including an external case.

According to an aspect of the present invention,

And a housing in which a plurality of cell elements are embedded,

The cell element includes a first electrode, a second electrode, and a separator formed between the first electrode and the second electrode,

The housing provides a cell casing for an electric energy storage module, the cell housing including a plurality of cell receptacles in which each cell element is received.

According to a preferred embodiment, the housing comprises a first housing and a second housing coupled to a lower portion of the first housing,

The first housing includes a first wall, a first partition formed on the first wall, a top plate formed on an upper end of the first wall, and a first coupling portion formed at a lower end of the first wall,

The second housing includes a second wall, a second partition formed on the second wall, a lower plate formed on a lower end of the second wall, and a lower plate formed on the upper end of the second wall and coupled with the first coupling And a second coupling portion,

The plurality of cell accommodating portions are formed by a combination (combination) of a plurality of first cell accommodating portions formed by the first compartment portion and a plurality of second cell accommodating portions formed by the second compartment portion.

Further, in the cell outer case for an electric energy storage device module according to the present invention,

A first conductive coupling plate disposed on an inner upper side of the housing and coupled with a first electrode of the cell element;

A first terminal member coupled to the first conductive coupling plate;

A second conductive coupling plate provided at an inner lower portion of the housing and coupled with a second electrode of the cell element; And

And a second terminal member coupled to the second conductive coupling plate.

In addition, the first conductive coupling plate preferably includes a unit cell coupling plate to which one cell element is welded and coupled, and a multiple cell coupling plate to which a plurality of cell elements are welded and coupled. It is preferable that the plate includes a multiple cell coupling plate in which a plurality of cell elements are welded and coupled.

In addition, the present invention provides an electric energy storage device module including the cell case in the present invention. The electrical energy storage device module may be selected, for example, from an electric double layer capacitor (EDLC) module or the like.

According to the present invention, there is provided an improved cell enclosure for modularization of an electric energy storage device and an electric energy storage device module comprising the same.

Specifically, according to the present invention, at least the number of components, the number of assembling processes, and the like are reduced by improving the structure, material, and / or welding method of the cell case, and at the same time, weight reduction can be achieved. Accordingly, the present invention has the effect of simplifying the manufacturing process (modular assembling process) of the electric energy storage device module, reducing the manufacturing cost (production unit cost), and reducing the weight.

1 is an exploded perspective view of an electric energy storage device module according to a first embodiment of the present invention.
2 is an exploded perspective view of an electric energy storage device module according to a second embodiment of the present invention.
3 is an exploded perspective view showing an embodiment of a module assembly constituting an electric energy storage device module according to the present invention.
4 is an exploded bottom perspective view showing an embodiment of a module assembly constituting an electric energy storage device module according to the present invention.
5 is an assembled cross-sectional view showing an embodiment of a module assembly constituting an electric energy storage device module according to the present invention.
6 is a perspective view showing an embodiment of a cell element constituting an electric energy storage device module according to the present invention.
7 is a cross-sectional view showing a main part showing an embodiment of a cell element constituting an electric energy storage device module according to the present invention.
8 is an exploded cross-sectional perspective view of a housing according to an embodiment of the present invention.
9 is a perspective exploded perspective view of a module assembly according to an embodiment of the present invention.
10 is a cross-sectional perspective view of a main part of a module assembly according to an embodiment of the present invention.
11 is a perspective exploded perspective view of a module assembly according to an embodiment of the present invention.
12 is a perspective exploded perspective view of an electric energy storage device module according to an embodiment of the present invention.
13 is a perspective exploded perspective view of an electric energy storage device module according to an embodiment of the present invention.
14 is a fragmentary cross-sectional view and an enlarged cross-sectional perspective view of a module assembly according to an embodiment of the present invention.
15 is an exploded perspective view of an electric energy storage device module according to an embodiment of the present invention.
16 is a photograph showing a state in which a weight is measured for a molded body according to an embodiment of the present invention.

As used herein, the term "and / or" is used to mean including at least one of the preceding and following elements. As used herein, the term "one or more" means one or more than one.

The terms "first", "second", "third", "fourth", "one side" and "the other" as used herein are used to distinguish one component from another And each component is not limited by the terms.

As used herein, the terms "forming on", "forming on top", "forming on bottom", "placing on top", "mounting on top" Does not mean that the constituent elements are directly laminated (installed), but includes the meaning that other constituent elements are formed (installed) between the constituent elements. For example, "formed on" and "mounted on" means not only that the second component is formed directly in contact with the first component, And includes a meaning that a third component can be further formed (installed) between the elements.

As used herein, the terms 'formation', 'installation', 'connection', 'coupling' and 'coupling' mean that two members are detachably coupled . For example, the terms 'formation', 'installation', 'connection', 'coupling', and 'engagement' used in the present specification include, for example, a force fitting method (force fitting method); A fitting method using a groove and a projection; And a fastening method using a fastening member such as a screw, a bolt, a piece, or a rivet, the two members are combined so as to be able to be combined and separated, and the two members After combining, includes a meaning that is not separable. Further, in the case of the 'formation' and the 'installation', it may include the meaning that the two members are laminated (seated) without a separate coupling force.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings illustrate exemplary embodiments of the invention and are provided to aid in the understanding of the invention only. In the accompanying drawings, reference numeral H denotes a fastener H for joining the components. Such fasteners H can be selected from, for example, screws, bolts, pieces and / or rivets. In describing the embodiments of the present invention, detailed description of known general functions and / or configurations will be omitted.

The present invention relates to a cell outer case (B) for an electric energy storage device module which is structurally and / or morphologically improved to reduce at least the number of parts and the number of assembly processes, Method). Further, according to another embodiment of the present invention, the material of the main components constituting the cell casing (B) is improved so that at least the light weight is excellent, and the chemical resistance (electrolyte resistance, etc.) and the mechanical strength A cell outer case (B) for an electric energy storage device module and a manufacturing method thereof (assembly method) are provided.

In addition, the present invention includes at least the cell casing (B) according to the present invention, thereby simplifying the manufacturing process (modular assembly process) of the electric energy storage device module, reducing the manufacturing cost An electric energy storage device module and a manufacturing method thereof (assembly method).

Hereinafter, an embodiment of an electric energy storage device module according to the present invention will be described, and a cell case B for an electric energy storage device module according to the present invention will be described together.

In the present invention, the electric energy storage device is not particularly limited as long as it can charge / discharge. In the present invention, the electric energy storage device is an electrochemical device, for example, a super capacitor such as an Electric Double Layer Capacitor (EDLC), a pseudo capacitor and a hybrid capacitor, ; General capacitors such as ceramic capacitors, Al electrolytic capacitors, and Ta capacitors; And general secondary batteries such as a lithium ion (Li ⁺ ) battery, a lithium polymer battery, a nickel-hydrogen (Ni-H) battery, a lead acid battery and an electrolytic capacitor.

In one example, the electrical energy storage device may be selected from an electrical double layer capacitor (EDLC). Hereinafter, an electric energy storage device module according to the present invention will be described as an example of an electric double layer capacitor (hereinafter abbreviated as "EDLC"). The term "electrical characteristic" as used below means at least one selected from the capacity, resistance, power density, energy density, voltage and leakage current, etc. of an electric energy storage device (e.g., EDLC). For example, "excellent electrical properties " means that at least one or more selected from the group consisting of capacitance, resistance, power density, energy density, voltage and leakage current of an electrical energy storage device Excellent (improved). "

Referring to FIGS. 1 and 2, an electric energy storage device module (hereinafter abbreviated as "module") according to the present invention includes at least one module assembly M. A module according to the invention may, for example, comprise one to ten module assemblies (M), the modules including two module assemblies (M) in FIGS. 1 and 2 have been illustrated.

The module according to the invention may comprise one or more module assemblies M and at least one control D according to a specific embodiment. The control unit D controls and / or manages the operation of the module assembly M, which may include, for example, a PCB substrate. The controller D may include a capacitor management system (CMS) or an ultra-capacitor management unit (UMU), as is commonly the case.

Further, the module according to the present invention may further include a connecting bus bar (E) for electrically connecting the module assemblies (M) when the module includes two or more module assemblies (M) have. The connecting bus bar E is conductive, which is selected, for example, from a metal material. In the present invention, conductivity means electrical conductivity. The connection bus bar E may be installed in one or more than one modules in the module, which is installed at the upper and / or lower ends of the module assembly M, so that the module assemblies M are connected in series and / . In addition, the module according to the present invention may further include an external terminal G installed on one side of the module assembly M. The external terminal G is connected to an external power source.

Referring to FIG. 2, a module according to the present invention may further include a module container F (Module Container) for housing the module assembly M, according to another embodiment. At least the module assembly (M) is accommodated in the module container (F). FIG. 2 illustrates a state in which two module assemblies M are housed in a module container F. FIG.

3 to 5, the module assembly M includes a plurality of cell elements A and a cell casing B for embedding the cell elements A. At this time, according to the present invention, a plurality of cell elements (A) are embedded in the cell casing (B). That is, according to the present invention, the module assembly M includes one cell enclosure B and a plurality of cell elements A, wherein one cell enclosure B includes a plurality of cell elements A ). In addition, the module assembly M may further include an assembling member C mounted on the cell casing B. Hereinafter, an exemplary embodiment of each component constituting the module according to the present invention will be described.

[1] Cell device (A)

Figs. 6 and 7 show an embodiment of the cell element A. Fig. Referring to FIGS. 6 and 7, the cell element A is not particularly limited as long as it is capable of being driven by the battery, and it can be configured as usual, for example. The cell element A includes at least one first electrode 10, at least one second electrode 20, and at least one separator 30, which can be charged / discharged, .

In the present invention, the number of the first electrode 10, the second electrode 20, and the separator 30 is not limited. The separator 30 is laminated between at least the first electrode 10 and the second electrode 20. At this time, in any one cell element A, the first electrode 10 may be an anode and the second electrode 20 may be a cathode. On the other hand, the first electrode 10 may be a cathode And the second electrode 20 may be the anode. The first and second electrodes 10 and 20 constituting each cell element A may be an anode and / or a cathode according to the serial / parallel connection.

The cell element A includes a laminate in which a first electrode 10 and a second electrode 20 are alternately stacked with at least one separator 30 interposed therebetween, . The components, materials, shapes, and the like of the constituent elements constituting the cell element (A) are not particularly limited. In the figure, a cylindrical cell element A is illustrated. As shown in the drawing, the cell element A is formed by winding a laminate including a first electrode 10, a second electrode 20 and a separator 30 in a cylindrical shape, banded winding element W as shown in FIG.

The cell element A, that is, the winding element W is impregnated with the electrolytic solution. The cell element A may be embedded in the cell casing B after being impregnated with the electrolytic solution or embedded in the cell casing B and then impregnated with the electrolyte solution. Specifically, a plurality of the cell elements A are built in the housing 100 constituting the cell casing B.

6 and 7, in the case of the EDLC, the first electrode 10 and the second electrode 20 are connected to the metal collectors 12 and 22, the metal collectors 12 and 22, And activated carbon electrodes 14 and 24 formed on the substrate. The activated carbon electrodes 14 and 24 are formed on at least one surface of the metal collectors 12 and 22.

Specifically, the activated carbon electrodes 14 and 24 may be formed on only one side of the metal collectors 12 and 22, or on both sides of the metal collectors 12 and 22. Figs. 6 and 7 show examples in which the activated carbon electrodes 14 and 24 are formed on both sides of the metal collectors 12 and 22, respectively. For example, aluminum foil may be used as the metal current collector 12 or 22, and the activated carbon electrodes 14 and 24 may be made of an activated carbon electrode including activated carbon, a binder, The composition may be formed by coating, rolling, or the like on the metal current collectors (12) and (22).

The first electrode 10 and the second electrode 20 may have weld joints 12a and 22a, respectively. Specifically, the first electrode 10 and the second electrode 20 include an activated carbon electrode 14 (24) formed by coating an active carbon electrode composition on the metal collectors 12 and 22, The first welding portion 12a and the second welding portion 22a as the portions where the electrodes 14 and 24 are not formed (coated).

6 and 7, the first welding portion 12a formed on the first electrode 10 is drawn upward and the second welding portion 22a formed on the second electrode 20 Can be drawn out downward. On the contrary, the first welding connection portion 12a may be drawn downward, and the second welding connection portion 22a may be drawn upward. Each of the weld joints 12a and 22a can function as an internal terminal of the EDLC and they are welded and combined with the conductive joint plates 210 and 220 of the cell casing B. Specifically, the first weld joint portion 12a is welded to the first conductive joint plate 210, and the second weld joint portion 22a is welded to the second conductive joint plate 220.

The module assembly M includes a plurality of the cell elements A as described above. The number of the cell elements A is not limited. One module assembly M may comprise, for example, two to eighteen cell elements A, In the figure, a module assembly M comprising six cell elements (A) is illustrated. In addition, the plurality of cell elements A are connected to each other in series and / or in parallel. The plurality of cell elements A are connected in series and / or in parallel through, for example, the conductive coupling plates 210 and 220 and / or the connecting bus bar E '.

[2] Cell outer case (B)

The cell enclosure (B) includes at least a housing (100). Fig. 8 is an exploded cross-sectional perspective view of the housing 100 according to the embodiment of the present invention. 3 and 8, a plurality of cell elements A are embedded in the housing 100 according to the present invention. That is, according to the present invention, the housing 100 includes a plurality of cell accommodating portions S (S1 to S6) capable of embedding a plurality of cell elements A therein. Specifically, the housing 100 has an internal space S in which a plurality of cell elements A are embedded, and the internal space S includes a plurality of cell accommodating portions S1 to S6).

According to a specific embodiment, the housing 100 includes a wall 110 forming an internal space S, a partition 120 formed in the wall 110, and a plurality of (S1 to S6). The shape and size (thickness, length, height, etc.) and the like of the wall body 110 are not limited as long as the wall body 110 can form an internal space S in which a plurality of cell elements A can be embedded.

The internal space S is a space in which a plurality of cell elements A can be embedded and is divided and partitioned into a plurality of cell receiving portions S1 to S6 by the dividing portion 120. [ At this time, the plurality of cell accommodating portions S1 to S6 are communicated with the adjacent cell accommodating portions S1 to S6 through a communication path 125.

The partition 120 is not particularly limited as long as it can divide and partition the internal space S into a plurality of cell accommodating portions S1 to S6. The partition 120 is formed on the inside of the wall 110, for example, and may be integrally formed with the wall 110 as shown in the figure. The plurality of cell receiving portions S1 to S6 may be formed by bending the wall 110 by a plurality of dividing portions 120 which are formed inside the wall 110 as described above.

In addition, the partition 120 is formed in the form of a partition, and it is sufficient that the plurality of cell receiving portions S1 to S6 can communicate with each other. Specifically, the partition 120 is formed by a partitioning member formed inside the wall 110, and the partitioning member is provided with a communication passage 125 to divide the internal space S into a plurality of cell receiving portions S1 To S6, and the cell accommodating portions S1 to S6 can communicate with each other.

The cell receiving portions S1 to S6 may have a cross-sectional shape such as a circular shape or a quadrangular shape. The cell accommodating portions S1 to S6 preferably have a shape corresponding to the shape of the cell element A. [ Specifically, when the cell element A is a cylindrical winding element W, the cell accommodating portions S1 to S6 are circular and have the same cross-sectional shape as the cell element A. At this time, in the present invention, a circle does not mean a complete circle.

The number of the cell accommodating portions S1 to S6 is not limited. The number of the cell accommodating portions (S1 to S6) corresponds to the number of the cell elements (A). That is, the number of the cell accommodating portions S1 to S6 and the number of the cell elements A are the same. 2 to 18 cell accommodating portions S1 to S6 may be formed in the housing 100, for example. As shown in the figure, in the case where the number of the cell elements A is six, the number of the cell accommodating portions S1 to S6 is six, which corresponds to (equals) the number of the cell elements A, One cell element A is built in the accommodating portions S1 to S6.

In addition, when the number of the cell accommodating portions S1 to S6 is six as described above, the cell accommodating portions S1 to S6 communicate with each other through the five communication paths 125. At this time, the communication path 125 may provide a flow path of the electrolyte solution to improve the electrolyte impregnation process. That is, when the electrolyte is injected through the electrolyte injection port 105 formed on one side of the housing 100, the electrolyte is injected into each of the cell accommodating portions S1 through S6 through the respective communication paths 125, A) can be impregnated into the electrolyte solution by one injection process.

In the present invention, the housing 100 includes a plurality of cell receiving portions S1 to S8, which are communicated with each other as described above and in which the plurality of cell elements A are embedded, S6) is not particularly limited. The housing 100 can be made of, for example, a metal material and / or a plastic material, which can also be manufactured through injection molding and / or extrusion molding.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings illustrate a preferred embodiment of a cell enclosure (B) according to the present invention and a module comprising the same. The cell casing B includes a housing 100 as described above according to a preferred embodiment of the present invention, a first conductive coupling plate 210 installed on the inner upper side of the housing 100, A first terminal member 310 coupled to the conductive coupling plate 210, a second conductive coupling plate 220 disposed under the housing 100, and a second conductive member coupled to the second conductive coupling plate 220. [ And a second terminal member (320).

The housing 100 includes a wall 110 formed with a plurality of cell receiving portions S1 to S6, a top plate 130 formed on the top of the wall 110, And a lower plate 140 formed at a lower portion of the lower plate 140. The housing 100 has an internal space S defined by the wall 110. The internal space S is divided into a plurality of sections 120 by the partition 120 formed inside the wall 110, And the plurality of cell accommodating portions S1 to S6 are communicated with each other through the communication passage 125. [

The upper plate 130 is coupled to the upper end of the wall 110 so as to have a sealing property, thereby sealing and closing the upper portion of the wall 110. Also, the top plate 130 may be coupled to the first terminal member 310 as well. At least one first coupling hole 133 may be formed in the upper plate 130 and a first terminal member 310 may be inserted and coupled to the first coupling hole 133 in a sealed manner .

The lower plate 140 is coupled to the lower end of the wall 110 so as to have a sealability, thereby sealing and closing the lower portion of the wall 110. In addition, the lower plate 140 may be coupled to the second terminal member 320 as well. At least one second coupling hole 143 may be formed in the lower plate 140 and a second terminal member 320 may be inserted and coupled to the second coupling hole 143 in a sealed manner .

According to a preferred embodiment, the housing 100 may include a first housing 101 and a second housing 102 coupled to a lower portion of the first housing 101. At this time, the wall 110 includes a first wall 111 and a corresponding second wall 112, and the partition 120 includes a first partition 121, And may include a partition 122.

In the case where the housing 100 is divided into two including the first housing 101 and the second housing 102 as described above, it is advantageous to form the housing 100 and the upper and lower portions of the wall 110 It is preferable in forming a sealing structure for sealing. That is, the upper plate 130 can be formed integrally with the first housing 101 through the integral molding, and the lower plate 140 can be integrally formed with the second housing 102.

More specifically, the first housing 101 includes a first wall 111, a plurality of first compartments 121 formed on the first wall 111, And may include an integrally formed upper plate 130. A plurality of first cell receiving portions (S-1) are formed by the first partition portion (121). Each of the first cell receiving portions S-1 has a height (depth) corresponding to approximately half of the height of the cell element A.

The second housing 102 includes a second wall 112, a plurality of second compartments 122 formed in the second wall 112, and a second wall 122 integrally formed at the lower end of the second wall 112. [ And a lower plate 140 formed thereon. A plurality of second cell receiving portions (S-2) are formed by the second partition portion (122). Each of the second cell receiving portions S-2 has a height (depth) corresponding to approximately half of the height of the cell element A. Each of the cell elements A is thus connected to each of the cell accommodating portions S1 to S6 formed by the combination of the first cell accommodating portion S-1 and the second cell accommodating portion S- .

The upper plate 130 includes a first base plate 131 for sealing and covering an upper end of the first housing 101 and at least one first coupling hole 133 formed in the first base plate 131, . ≪ / RTI > More specifically, for example, the upper plate 130 includes a first base plate 131 integrally formed on an upper end of the first wall 111 to close and close an upper end of the first wall 111, A first coupling plate 132 integrally protruded from the base plate 131 and a first coupling hole 133 formed in the first coupling plate 132. One or more of the first coupling plate 132 and the first coupling hole 133 are plural and the first coupling member 132 and the first coupling member 133 have a sealing and coupling structure with the first terminal member 310. In the drawing, the top plate 130 having four first coupling plates 132 and four first coupling holes 133 is illustrated.

The lower plate 140 includes a second base plate 141 for sealing and covering the lower end of the second housing 101 and at least one second engagement hole 143 formed in the second base plate 141, . ≪ / RTI > More specifically, for example, the lower plate 140 includes a second base plate 141 integrally formed on the lower end of the first wall body 112, and a second coupling plate 141 integrally formed from the first base plate 141, A plate 142, and a second coupling hole 143 formed in the second coupling plate 142. One or more of the second engagement plate 142 and the second engagement hole 143 are plurally provided. The first engagement member 142 and the second engagement member 143 provide a sealing and coupling structure with the second terminal member 320. In the drawing, the lower plate 140 having the second coupling plate 142 and the second coupling hole 143 is illustrated.

The first housing 101 and the second housing 102 may include engaging portions 151 and 152 for engaging with each other. Specifically, the first housing 101 includes a first coupling portion 151 formed integrally with a lower end of the first wall 111, and the second housing 102 includes an upper portion And a second engaging portion 152 integrally formed with the second engaging portion 152. [ The first engaging portion 151 and the second engaging portion 152 may protrude from the lower end of the first wall 111 and the upper end of the second wall 112 to have a rectangular shape, have. The first and second engaging portions 151 and 152 may be hermetically sealed by fastening and / or welding (melting) coupling, for example, through a fastener H.

The first conductive coupling plate 210 has conductivity, which may be selected from, for example, a metal material. For example, the first conductive coupling plate 210 may be formed of a metal material such as aluminum (Al), an aluminum (Al) alloy, and / or stainless steel (SUS). The first conductive coupling plate 210 may have a disk shape, a polygonal shape, and / or a shape in which two or more of these shapes are combined according to the shape of the cell element A. For example, in the case where the cell element A is a cylindrical winding element W, the first conductive coupling plate 210 may have two or more disc shapes and / Shape.

The first conductive coupling plate 210 may include a coupling hole 212 formed at the center and a plurality of through holes 214 radially formed around the coupling hole 212. At this time, the first terminal member 310 is fitted into the coupling hole 212 and is coupled. The electrolyte and / or the gas may be passed through the through hole 214.

The first conductive coupling plate 210 is disposed on the inner upper side of the first housing 101 and welded to the first electrode 10 of the cell element A. [ More specifically, one side (lower surface in FIG. 3) of the first conductive coupling plate 210 is welded to the first welding portion 12a of the first electrode 10 and electrically connected thereto. 3) of the first conductive coupling plate 210 is coupled to the first terminal member 310 while being in close contact with the upper plate 130.

Referring to FIGS. 3 and 9, one or more than one first conductive bonding plates 210 are provided on the inner side of the housing 100, and one first conductive bonding plate 210 One or more than two cell elements (A) are welded and joined together.

According to a preferred embodiment, a plurality of the first conductive coupling plates 210 are provided on the inner upper side of the housing 100, and the unit cell coupling plates 210 (210a And a plurality of cell coupling plates 210 and 210b to which two or more cell elements A are welded and coupled. In this case, as illustrated in the drawing, the unit cell coupling plates 210 and 210a may have a disc shape, and the multiple cell coupling plates 210 and 210b may have a shape in which two or more discs are combined . In the figure, a total of four first conductive coupling plates 210 are provided on the inside of the housing 100, and two unit cell coupling plates 210a having a circular plate shape and a plurality of cell assemblies And two plates 210b are installed.

According to the present invention, when the first conductive coupling plate 210 has the above configuration, it is connected to the first electrode 10 of the wrapped cell element A, that is, the winding element W in a wide contact area Improves electrical properties. For example, it implements a low resistance characteristic. The first conductive coupling plate 210 connects the plurality of cell elements A directly and / or in parallel at an inner upper portion of the housing 100. That is, the cell elements A are connected directly and / or in parallel through the plurality of first conductive coupling plates 210. In this regard, the first conductive coupling plate 210 also functions as an internal bus bar.

According to a preferred embodiment, when the first conductive coupling plate 210 includes the multiple cell coupling plate 210b, at least the number of the first terminal members 310 may be reduced. More specifically, one first terminal member 310 is coupled to one of the plurality of cell coupling plates 210b, and a plurality of cell elements A are welded to the one of the plurality of cell coupling plates 210b, The total number of the first terminal members 310 can be reduced.

For example, when six cell elements A are embedded in the housing 100, six first terminal members 310 are required to be provided. In this case, When the plate 210b is included, the number of the first terminal members 310 is reduced because two or more cell elements A can be coupled to the multiple cell coupling plate 210b. That is, as shown in FIG. 3, when six cell elements A are provided in the housing 100, the number of the first terminal members 310 is four by the multiple cell coupling plate 210b, The number of the first terminal members 310 is reduced.

The first terminal member 310 has conductivity, which can be selected from, for example, a metal material. For example, the first terminal member 310 may be formed of a metal material such as aluminum (Al), aluminum (Al) alloy, and / or SUS. The first terminal member 310 is inserted into the coupling hole 212 of the first conductive coupling plate 210 and is also coupled to the top plate 130 of the first housing 101. The number of the first terminal members 310 corresponds to the number of the first conductive coupling plates 210. For example, when the number of the first conductive coupling plates 210 is four, the number of the first terminal members 310 is four, which is the same as the number of the first conductive coupling plates 210.

According to a preferred embodiment, the first terminal member 310 includes a first terminal body 311 having a cylindrical shape, a fastening groove 312 formed at the center of the first terminal body 311, A protrusion 313 integrally protruding from one side (lower side in FIG. 3) of the first terminal body 311 and a coupling hole 315 coupled to the other side (upper side in FIG. 3) of the first terminal body 311 And a hole coupling part 316 formed at a distal end of the first terminal body 311 (lower end in FIG. 3).

The first terminal body 311 is inserted into the first coupling hole 133 of the upper plate 130. At this time, the upper end of the first terminal body 311 inserts and passes through the first coupling hole 133, and is then exposed to the upper portion of the upper plate 130. 10, the coupling member 315 is coupled to the upper side of the first terminal body 311, and a sealing member 314 and a sealing member 314 are interposed between the protrusion 313 and the coupling hole 315. In addition, 1 coupling plate 132 are inserted. The coupling hole 315 may be selected from, for example, a nut screwed into the outer peripheral surface of the first terminal main body 311, or the like. The hole coupling part 316 is inserted into and coupled with the coupling hole 212 of the first conductive coupling plate 210.

The first terminal member 310 may be welded to the first conductive coupling plate 210. Specifically, the first terminal member 310 is inserted and coupled to the coupling hole 212 of the first conductive coupling plate 210, and then the first conductive coupling plate 210 The contact surface is welded. 10, at least the lower surface of the projecting portion 313 and the upper surface of the first conductive coupling plate 210 which are in contact with the first terminal member 310 and the first conductive coupling plate 210, Are welded, and these (313) and (210) may be laser-welded, for example.

The second conductive coupling plate 220 is installed on the inner lower portion of the second housing 102 and welded to the second electrode 20 of the cell element A. [ More specifically, one surface (lower surface in FIG. 4) of the second conductive coupling plate 220 is welded to the second welding connection portion 22a of the second electrode 20 to be electrically energized. The other side surface (upper surface in FIG. 4) of the second conductive coupling plate 220 is joined to the second terminal member 320 while closely contacting the lower plate 140.

The second conductive coupling plate 220 may include a coupling hole 222 formed at the center and a plurality of through holes 224 radially formed around the coupling hole 222. At this time, the second terminal member 320 is coupled to the coupling hole 222. The second conductive coupling plate 220 may have the same structure as the first conductive coupling plate 210. Hereinafter, in describing the second conductive bonding plate 220, if there is any unexplained portion, the first conductive bonding plate 210 is described.

4 and 11, the second conductive coupling plate 220 may have a circular plate shape, a polygonal plate shape, and / or a circular shape depending on the shape of the cell element A, A shape in which two or more of these shapes are combined, and the like. One or two or more second conductive connecting plates 220 may be provided on the inner side of the housing 100, and one or more conductive connecting plates 220 may be provided on one of the first conductive connecting plates 220, The element A is welded and joined.

According to a preferred embodiment, a plurality of second conductive coupling plates 220 are provided on the inner side of the housing 100, and a plurality of cell coupling plates 220b, . ≪ / RTI > At this time, the multiple cell coupling plate 220b may have a shape in which two or more discs are combined. In the figure, a total of three second conductive coupling plates 220 are provided on the inside of the housing 100, and three multi-cell coupling plates 220b having a shape in which two discs are combined are installed.

The second conductive coupling plate 220 has a large contact area with the second electrode 20 of the wound cell element A, that is, the winding element W, as described above with respect to the first conductive coupling plate 210 Thereby improving electrical characteristics. In addition, the second conductive coupling plate 220 connects the plurality of cell elements A directly and / or in parallel in the inner lower portion of the housing 100.

According to a preferred embodiment, when the second conductive coupling plate 220 includes the multiple cell coupling plate 220b, the number of the at least second terminal members 320 may be reduced. More specifically, one second terminal member 320 is coupled to one of the plurality of cell coupling plates 220b, and a plurality of cell elements A are welded and coupled to the one multiple cell coupling plate 220b, The total number of the two terminal members 320 can be reduced. For example, in a case where six cell elements A are housed in the housing 100, six second terminal members 320 are required to be provided. In this case, The number of the second terminal members 320 is reduced because two or more cell elements A can be coupled to the multiple cell coupling plate 220b. 4, when six cell elements A are provided in the housing 100, the number of the second terminal members 320 is three by the multiple cell coupling plate 220b, The number of the two terminal members 310 to be mounted is reduced.

The second terminal member 320 may be formed in the same manner as the first terminal member 310 as the conductive member. The second terminal member 320 is fitted into the coupling hole 222 of the second conductive coupling plate 220 and is also coupled to the lower plate 140 of the second housing 102. The number of the second terminal members 320 corresponds to the number of the second conductive coupling plates 220. For example, when the number of the second conductive coupling plates 220 is three, the number of the second terminal members 320 is three, which is the same as the number of the second conductive coupling plates 220.

According to a preferred embodiment, the second terminal member 320 includes a cylindrical second terminal body 321, a coupling groove 322 formed at the center of the second terminal body 321, A protrusion 323 integrally protruding from one side (lower side in FIG. 4) of the second terminal body 321 and a coupling hole 325 coupled to the other side (upper side in FIG. 4) of the second terminal body 321 And a hole fastening portion 326 formed at a distal end of the second terminal body 321 (lower end in FIG. 4).

The second terminal body 321 is inserted into the second engagement hole 143 of the lower plate 140. At this time, the lower end of the second terminal body 321 inserts and passes through the second engagement hole 13, and is exposed to the lower portion of the lower plate 140. 4), and a sealing member 324 and a sealing member 324 are interposed between the protrusion 323 and the fitting hole 325. The sealing member 324 is formed of a resin material, The first engaging plate 142 is engaged in a state of being inserted. The hole coupling part 326 is inserted into the coupling hole 222 of the second conductive coupling plate 220.

In addition, the second terminal member 320 may be welded to the second conductive coupling plate 220. Specifically, the second terminal member 320 is inserted and coupled to the coupling hole 222 of the second conductive coupling plate 220, and then the second coupling member 220 and the second coupling member 220 are inserted into the coupling hole 222 of the second terminal member 320, The contact surface is welded. The lower surface of at least the protruding portion 323 and the upper surface of the second conductive coupling plate 220 which are in contact with the second terminal member 320 are welded to each other in the contact surfaces of the second terminal member 320 and the second conductive coupling plate 220, 323) 220 may be laser-welded, for example.

The gas leakage holes 161 and 162 are formed in the upper plate 130 and the lower plate 140 and the safety levers 171 and 172 are installed in the gas leakage holes 161 and 162 . The gas leak holes 161 and 162 and the safety valves 171 and 172 are provided for safety against an increase in the internal pressure of the EDLC and / or explosion and one or more gas leakage holes 161 and 162 are formed in the upper plate 130 and the lower plate 140, respectively . The safety valves 171 and 172 are capable of preventing leakage of electrolyte through the gas leakage holes 161 and 162 and are not particularly limited as long as they are gas permeable. The safety valves 171 and 172 may be selected from, for example, a film and / or a membrane of a synthetic resin or a rubber material.

As described above, the first and second conductive coupling plates 210 and 220 are coupled to the upper and lower portions of the plurality of cell elements A, respectively, and the first and second conductive coupling plates 210 and 220 are coupled to the first and second terminal members 310 and 320, respectively. The first and second terminal members 310 and 320 are connected to the first and second housings 101 and 102 after being assembled in the first and second housings 101 and 102, And is hermetically sealed through the upper plate 130 and the lower plate 140 and the sealing members 314 and 324.

In addition, an electrolyte injection port 105 may be formed at one side of the housing 100, and an electrolyte outlet 106 may be formed at the other side. As illustrated in the drawing, the electrolyte injection hole 105 and the outlet 106 may be formed in the second housing 102. 3 and 5, the second housing 102 includes a support portion 155 extending downward from the second engaging portion 152 integrally with the support portion 155, An electrolyte injection port 105 and an outlet port 106 formed through the two walls 112 may be formed. The finishing cap 180 may be hermetically sealed with the sealing member 184 inserted into the electrolyte injection port 105 and the outlet port 106.

The initial injection and the supplementary injection of the electrolytic solution may proceed through the electrolyte injection hole 105. As described above, when the electrolyte is injected through the electrolyte injection port 105, the electrolyte solution is injected into the cell receiving portions S1 to S6 through the communication paths 125, so that the plurality of cell elements A It can be impregnated with the electrolytic solution by one injection process. The remaining filtrate of the electrolytic solution can be discharged through the electrolyte outlet 106.

In the present invention, the sealing members 314, 324, and 184 may be those having a sealing property capable of preventing leakage of at least the electrolyte solution. The sealing members 314, 324 and 184 may be selected from, for example, an O-ring composed of silicon or rubber, but are not limited thereto.

The cell casing B described above can be constructed in such a manner that the upper and lower portions of the cell casing B are compactly finished to a minimum size and a minimum volume by the structure and / do. In addition, each component is coupled to each other in a simple assembly structure.

Meanwhile, according to a specific assembling process, the conductive coupling plates 210 and 220 may be combined with the cell element A after being first bonded to the terminal members 310 and 320. The first conductive coupling plate 210 is coupled to the first terminal member 310 through the fitting of the hole coupling portion 316 and the welding of the coupling and at least the protrusion 313 according to a more specific assembling process, And then welded to the first welded portion 12a of the first electrode 10. The second conductive coupling plate 220 may be coupled with the second terminal member 320 through fitting or coupling with the hole coupling part 326 and welding or joining at least the protrusion part 323 with the second terminal member 320, Can be welded and joined to the second welded joint 22a of the electrode 20.

Next, the element combination body in which the conductive coupling plates 210 and 220 and the terminal members 310 and 320 are coupled to the upper and lower portions of the cell element A is mounted on the first and second housings 101 and 102 102). After the first and second engaging portions 151 and 152 of the housings 101 and 102 are coupled to each other first and then the upper plate 130 and the lower plate 130 of the housings 101 and 102, The assembly of the module assembly M can be completed by sealing and connecting the terminal members 310 and 320 to the terminal assembly 140.

9 and 11, the conductive bonding plates 210 and 220 are welded to the electrodes 10 and 20, respectively, and they are preferably bonded through laser welding , And more preferably radially laser-welded. More specifically, the first conductive coupling plate 210 is welded and coupled with the first welding coupling portion 12a of the first electrode 10 and the radial laser welding portion L, and the second conductive coupling plate 220 are welded and joined by the second welding portion 22a of the second electrode 20 and the radial laser welding portion L. [ 9 and 11, the radial laser welded portion L is indicated by a dotted line. At least eight radial laser welds L are preferred. For example, it is preferable that the radial laser welding portion L has 8 to 40, 12 to 40, or 16 to 40 on the conductive coupling plates 210 and 220 on the disk. In the figure, 20 radial laser welds (L) are shown on one disc.

When the conductive joint plates 210 and 220 and the weld joints 12a and 22a are welded and joined by at least eight radial laser welds L as described above, (Contact area) between the welded portions 12a, 22a and the weld joints 12a, 22a is increased, at least the resistance of the EDLC is improved (the internal resistance is reduced). This can also improve the power density and / or the energy density of the EDLC by improving the resistance (decreasing the internal resistance).

[3] Assembly member (C)

The assembly member C is installed on the cell casing B, and at least the control part D can be assembled thereto. Further, the guide P (see Fig. 15) can be arranged / arranged through the assembling member C as described above. The assembling member C may include a first assembling member C1 provided on the upper portion of the cell casing B and a second assembling member C2 provided below the cell casing B. The first assembling member C1 and the second assembling member C2 may be configured identically.

Each of the assembly members C and C1 and C2 includes a substrate 411 closely attached to the upper plate 130 and the lower plate 140 and a lower wall 412 formed on the side surface of the substrate 411 And an upper wall 413. At this time, the lower wall 412 is in close contact with the outer peripheral surface of the wall 110 of the housing 100. The through holes 415 formed through the substrate 411 may be formed in the assembly members C, C1, and C2. Through the through holes 415, the terminal members 310 and 320 and / or the gas leakage holes 161 and 162 can be exposed.

On the other hand, in modularizing the cell, it is important to arrange the word P (P). Each of the assembly members C, C1 and C2 includes a substrate 411 closely attached to the upper plate 130 and the lower plate 140, And a < / RTI > The wire fixing portion 416 arranges the wire P in the wire fixing portion 416. Specifically, a plurality of the wire fixing portions 416 are formed on the substrate 411. The wire fixing portion 416 may be formed with a wire fixing groove 416a through which the wire P is inserted and fixed.

Further, a wire connector 450 may be coupled to the end of each of the terminal members 310 and 320. The wire connector 450 can be coupled to the coupling grooves 312 and 323 of the terminal members 310 and 320 through the fastener H. According to a specific embodiment of the present invention, the wire connector 450 includes a wire insertion portion 451 to which the wire P is coupled, a wire insertion portion 451 formed on one side of the wire insertion portion 451, And a terminal coupling portion 452 coupled to the coupling groove 312 or 322 through a fastener H. 15, one side of the wire P is connected to the wire connector 450 coupled to the terminal members 310 and 320, and the other side of the wire P is connected to the control unit D .

2 and 15, a wire passage hole P410 through which the wire P is passed is formed in each of the assembly members C, C1, and C2, and each of the housings 101, 102 The wire connection groove P151 (P152) may be formed in the coupling portion 151 (152) 15, the wire P connected to the bottom (bottom) of the module assembly M, that is, the wire P arranged / arranged on the second assembly member C2, Passes through the wire passage holes P410 along the wire clearance grooves P151 and P152 formed in the fixing portions 151 and 152 and then connected to the control portion D assembled at the upper portion of the module assembly M .

[4] Module container (F)

At least one module assembly M is accommodated in the module container F so long as it can protect the module assembly M from an external impact or the like.

The module container F may be made of, for example, a metal material and / or a plastic material. The module container F may include, for example, a rectangular container body F10 and a container cover F20 coupled to an upper portion of the container body F10. At this time, the container lid F20 may be hermetically sealed or coupled to an upper portion of the container body F10 through a fastener, or may be hermetically sealed through a welding method such as laser welding.

In addition, two terminal fitting grooves F21 and F22 may be formed on one side of the container lid F20. The external terminal G is inserted and coupled to the terminal fitting grooves F21 and F22. Referring to FIGS. 14 and 15, at least one compression rib F25 may be formed under the container cover F20. The compression rib F25 presses the upper end of the first assembly member C1 to improve the coupling force between the first assembly member C1 and the cell casing B while preventing the module assembly M from shaking.

[5] External terminal (G)

The external terminal G is installed on one side of the module assembly M. The external terminal G is connected to an external power source and may include a first external terminal G1 and a second external terminal G2. The first external terminal 510 is engaged with the first terminal fitting groove F21 of the container cover F20 and the second external terminal 520 is engaged with the second terminal fitting groove F20 of the container cover F20. F22).

Each of the external terminals G1 and G2 includes a conductive external terminal body 511, a fastening groove 512 formed at the center of the external terminal body 511, And a conductive terminal coupling plate 515 coupled to the lower end. The terminal coupling plate 515 may be formed with an insertion hole 515a. The external terminals G1 and G2 are hermetically sealed through the terminal fitting grooves F21 and F22 and the sealing member 514 to prevent moisture and the like from entering from the outside .

The terminal fitting plate 515 is mounted on the first terminal member 310 and the first terminal body 311 of the first terminal member 310 is inserted into the insertion hole 515a. The first terminal body 311 is inserted into the insertion hole 515a and then the wire connector 450 is fastened to the fastening groove of the first terminal member 310 312 through a fastener H, as shown in FIG. The external power source may be connected to the outer peripheral surface of the external terminal body 511 or may be connected to the coupling groove 512 formed at the center of the external terminal body 511.

According to another embodiment of the present invention, at least the housing 100 among the constituent elements of the cell casing B may be formed of a plastic molded body, which is preferably made of an engineering plastic molded body . In some cases, the assembly members (C) (C1) and (C2) may also be made of an engineering plastic molding. Specifically, among the constituent elements of the cell casing B according to the present invention, at least the housing 300 is made of an engineering plastic molded body, and preferably the assembly member (C) (C1) C2 It is also preferable to use an engineering plastic molding.

In the present invention, the term "engineering plastic molded product" is included in a case where the constituent material of the molded product includes at least engineering plastic (E / P: Engineering Plastics). Specifically, the engineering plastic formed body may be formed of an engineering plastic (E / P) alone as a molding material or an engineering plastic (E / P) as a first component (main constituent) And the second component other than the first component may be molded as a molding material. The second component is not particularly limited as long as it is not an engineering plastic (E / P), for example, a resin component such as a non-engineering plastic; Reinforcement materials such as inorganic materials for strength reinforcement; Molding improvers such as mold release agents and lubricants for moldability; And / or additives such as antioxidants and color pigments; And the like. In one example, the engineering plastic molding comprises 80 wt% or more, specifically 80 to 100 wt%, 85 to 99.9 wt%, or 90 to 98 wt% of engineering plastic (E / P) .

In the present invention, the engineering plastic (E / P) is a plastic (polymer) having high strength, high heat resistance and high endurance, which is distinguished from general plastics such as polyethylene (PE) and polypropylene And is not particularly limited as long as it is used as engineering plastics (E / P) in other industrial fields.

According to the present invention, the housing 100 is manufactured (molded) from a molding material containing at least the engineering plastic (E / P) as described above, and it can be produced, for example, by extrusion molding and / Can be manufactured (molded). According to the present invention, the housing 100, which occupies the main weight and volume of the cell casing B, is made of an engineering plastic molded body, so that it can maintain a high strength or the like equal to or higher than that of a conventional metal case such as aluminum But at least has excellent light weight.

(E / P) having a weight average molecular weight of 120,000 or more and a degree of crystallinity of 40% or more in consideration of strength, heat resistance, and chemical resistance, etc., according to one embodiment of the present invention. It is better to be selected. At this time, when the crystallinity is too low, it can be eluted by the electrolytic solution. Considering this point, it is preferable to select from a crystalline engineering plastic (E / P) having a crystallinity of 45% or more, or 50% or more.

According to a specific embodiment, the engineering plastics (E / P) are prepared from crystalline engineering plastics (E / P) having a weight average molecular weight of, for example, 200,000 to 5 million and a crystallinity of, for example, 50% to 85% Can be selected. When such a crystalline engineering plastic (E / P) having a weight average molecular weight and a crystallinity is used, it is advantageous in terms of electrolyte resistance and moldability while having excellent mechanical / thermal properties such as strength and heat resistance.

Specific examples of the engineering plastic (E / P) include polyamide (PA), polyacetal (POM), polybutylene terephthalate (PBT), polyethylene terephthalate ), Polyphenylene sulfide (PPS), thermoplastic polyester elastomer (TPEE), copolymers thereof, and the like. Examples of the polyester elastomer (TPEE) include olefin-based and / or thermoplastic polyurethane (TPU) such as styrene-based or thermoplastic olefinic elastomer (TPO) such as thermoplastic styrenic block copolymer (SBC) polyurethane, and the like. Among these engineering plastics (E / P), polyamide (PA), polyacetal (POM), polybutylene terephthalate (PBT) and / or polyethylene terephthalate (PET) are used in consideration of economical efficiency, compatibility and / May be usefully used.

According to a preferred embodiment of the present invention, the engineering plastic formed article, that is, the housing 100 and / or the assembling members C, C1, and C2 has at least the following physical properties (a) to It is good to be satisfied. According to the present invention, when the engineering plastic molding satisfies at least the following physical properties, it is not only lightweight but also excellent in strength, heat resistance, chemical resistance, etc., and when an impact is applied to the EDLC, (B) of the EDLC cell.

(a) a density of 1.8 g / cm 3 or less

(b) Tensile strength 145 MPa or more

(c) At a curvature stress of 1.82 MPa, a heat distortion temperature of 185 ° C or more

At this time, when the density is more than 1.8 g / cm 3, it is not preferable for lightness. If the density is too low, the mechanical strength may be lowered. In consideration of this point, it may be preferable that the density is, for example, 1.2 g / cm3 to 1.8 g / cm3. When the tensile strength is less than 145 MPa, deformation may be caused by an increase in internal pressure or an external impact. Considering this point, the tensile strength is preferably 148 MPa or more, and for example, it may be preferable to be 148 MPa to 220 MPa. In addition, when the thermal deformation temperature is less than 185 캜, thermal deformation may occur when a high temperature is generated in the interior of the EDLC. In consideration of this point, the heat distortion temperature is preferably 190 DEG C or higher, specifically 190 DEG C to 300 DEG C, and more preferably 200 DEG C to 300 DEG C.

In the present invention, the engineering plastic molded article may have any of the above physical properties depending on the type, molecular weight, crystallinity (degree of crystallinity) and / or degree of modification of the engineering plastic (E / P). The engineering plastic molded article has a density of 1.8 g / cm 3 or less, a tensile strength of 145 MPa or more, and a thermal deformation temperature (1.82 MPa) by the inherent physical properties of the engineering plastics (E / Is 185 deg. C or higher.

According to a preferred embodiment of the present invention, the housing 100 is composed of a first housing 101 and a second housing 102, which are made of the engineering plastic molding as described above, Or the like. That is, the first engaging portion 151 and the second engaging portion 152 formed on the respective housings 101 are preferably hermetically sealed by melting through a welding method. More preferably, the first and second engaging portions 151 and 152 are hermetically sealed by welding (melting) using a diode laser.

2. Description of the Related Art Generally, in the case of a conventional metal case, a method of joining a metal housing and a cover by welding using a high output fiber laser in the vertical direction is the mainstream. In this case, however, a high power of about 2 kW or more is required, and a fiber laser welder is very expensive as about 250 million Won. Further, by high-power laser welding, the EDLC is deteriorated and the electrical characteristics are deteriorated.

On the other hand, according to the present invention, when a diode laser is used, excellent sealing of the first housing 101 and the second housing 102 is achieved, and energy consumption is minimized by melting and bonding even at low power. In addition, the diode laser welder is about 100 million won and the equipment price is lower than that of the fiber laser welder. Above all, diode laser welding does not cause deterioration of EDLC and prevents degradation of electrical properties.

According to a specific embodiment, the first and second coupling parts 151 and 152 may be welded (melted) and bonded by a diode laser using a power of 220 W to 380 W. If the power is less than 220 W, the melting and bonding properties may be low. If the power exceeds 380 W, deterioration of the EDLC may be caused, or deformation of the coupling portions 151 and 152 may occur . In consideration of this point, it may be preferable to weld (melt) and bond, for example, by applying a power of 280 W to 320 W to a diode laser welder.

According to the present invention described above, the structural and / or morphological improvement of the components constituting the shell case B reduces the number of components as well as the number of assembly processes as well as lightness. In addition, the manufacturing process (modular assembly process) of the electric energy storage device module is simplified and the manufacturing cost (production unit cost) and the like are reduced due to the decrease in the number of parts and the number of assembling processes of the cell casing B.

In addition, when at least the housing 100 is made of an engineering plastic molded body, weight reduction is improved. As a result, the use of at least an insulator is eliminated and the number of parts is reduced as compared with the conventional metal case. This means that the electrical energy storage device module is light in weight, and is well handled, .

Hereinafter, examples and comparative examples of the present invention will be exemplified. The following examples and comparative examples are merely provided by way of example of mechanical / thermal properties and chemical resistance (electrolyte resistance) according to the use of engineering plastics (E / P), whereby the technical scope of the present invention is limited It is not. In addition, the following comparative example is not meant to be a prior art, but is provided for comparison with embodiments only.

[Examples 1 to 3]

<Engineering Plastic (E / P) Molded Body>

A cylindrical shaped body was produced using crystalline engineering plastic (E / P). At this time, the types of crystalline engineering plastics (E / P) were varied according to each example. (PBT, manufactured by DuPont) in the case of Example 2, polyphenylene sulfide-based (polyphenylene sulfide-based) in the case of Example 3, PPS system, manufactured by PolyPlastics) as a main component.

The physical properties and electrolyte resistance of the molded products according to the respective Examples were evaluated, and the results are shown in Table 1 below. At this time, the electrolyte solution was prepared by dissolving electrolytic salt TEABF4 ((C ₂ H ₅ ) ₄ NBF ₄ ) in a solvent acetonitrile (ACN) to prepare an electrolytic solution of a saturated solution, immersing the molded body in the electrolytic solution, And weight change (weight reduction) and appearance change (discoloration or pinhole occurrence) were observed. 16 is a photograph showing a state in which the initial weight is measured for the molded body (PA system) according to the first embodiment.

[Comparative Examples 1 to 3]

According to each comparative example, a cylindrical shaped body was produced by changing the kind of plastic. In the case of Comparative Example 1, a polycarbonate (PC) system was used as an amorphous engineering plastic (E / P). In the case of Comparative Example 2, a polypropylene (PP) system was used as a general plastic (non-engineering plastic). In Comparative Example 3, a polyethylene (PE) system was used as a general plastic (non-engineering plastic).

The physical properties and electrolyte resistance of the molded products according to the respective comparative examples were evaluated in the same manner as in Example 1, and the results are also shown in Table 1 below.

       &Lt; Property of E / P molded article and evaluation result of electrolyte resistance > Remarks Of the shaped body
material Crystallinity
[%] density
[g / cm3] The tensile strength
[MPa] Heat distortion temperature
[Deg.] C, (@ 1.82 MPa) Electrolytic solution resistance Weight reduction Appearance change Example 1 PA 58 1.44 151 283 none none Example 2 PBT 64 1.56 149 264 none none Example 3 PPS 42 1.66 180 265 none none Comparative Example 1 PC Amorphous - - - Occur Pinhole Comparative Example 2 PP 27 - 143 168 none none Comparative Example 3 PE 14 - 82 112 Occur none * PA: Polyamide based crystalline plastic (E / P)
* PBT: Polybutylene phthalate type crystalline engineering plastic (E / P)
* PPS: Polyphenylene sulfide type crystalline engineering plastic (E / P)
* PC: Polycarbonate based amorphous engineering plastic (E / P)
* PP: Polypropylene type general plastic (non-engineering plastic)
* PE: Polyethylene general plastic (non-engineering plastic)

As shown in the above Table 1, it can be seen that when an engineering plastic (E / P) is crystalline, it has excellent chemical resistance (resistance to electrolytic solution) as well as mechanical strength (tensile strength) and heat resistance . In addition, it can be seen that excellent results are obtained when the degree of crystallization is large.

10: first electrode 20: second electrode
30: separator 100: housing
110: wall 120:
210: first conductive bonding plate 220: second conductive bonding plate
310: first terminal member 320: second terminal member
A: Cell device B: Cell outer case
C: Assembly member D:
E: Connected bus bar F: Module container
G: External terminal M: Module assembly
S: inner space S1 to S6:

Claims (12)

And a housing (100) in which a plurality of cell elements (A) are embedded,
The cell element A includes a first electrode 10, a second electrode 20 and a separator 30 formed between the first electrode 10 and the second electrode 20,
Wherein the housing (100) includes a plurality of cell receiving portions (S1 to S6) in which each cell element (A) is accommodated.
The method according to claim 1,
The housing 100 is formed by a wall 110 and has an internal space S in which a plurality of cell elements A are embedded,
The internal space S is divided into a plurality of cell receiving portions S1 to S6 by a partition 120 formed in the wall 110,
(B) for a cell for an electric energy storage device module, wherein the plurality of cell receiving portions (S1 to S6) communicate with each other.
The method according to claim 1,
The housing 100 includes a first housing 101 and a second housing 102 coupled to a lower portion of the first housing 101,
The first housing 101 includes a first wall 111, a first partition 121 formed on the first wall 111, a top plate 130 formed on the top of the first wall 111, And a first engaging portion 151 formed at a lower end of the first wall 111,
The second housing 102 includes a second wall 112, a second partition 122 formed on the second wall 112, a lower plate 140 formed on the lower end of the second wall 112, And a second engaging portion 152 formed at the upper end of the second wall 112 and engaged with the first engaging portion 151,
The plurality of cell accommodating portions S1 to S6 may include a plurality of first cell accommodating portions S-1 formed by the first partitioning portions 121 and a plurality of second cell accommodating portions S- And the second cell accommodating portion (S-2).
The method according to claim 1,
The cell casing (B)
A wall 110 formed with the plurality of cell accommodating portions S1 through S6, an upper plate 130 formed at an upper portion of the wall 110, and a lower plate 140 formed at a lower portion of the wall 110 (100);
A first conductive coupling plate 210 disposed on the inner side of the housing 100 and coupled with the first electrode 10 of the cell element A;
A first terminal member (310) coupled to the first conductive coupling plate (210);
A second conductive coupling plate 220 installed on the inner lower side of the housing 100 and coupled with the second electrode 20 of the cell element A; And
And a second terminal member (320) coupled to the second conductive coupling plate (220).
5. The method of claim 4,
The housing 100 includes a first housing 101 and a second housing 102 coupled to a lower portion of the first housing 101,
The first housing 101 includes a first wall 111, a first partition 121 formed on the first wall 111, a top plate 130 formed on the top of the first wall 111, And a first engaging portion 151 formed at a lower end of the first wall 111,
The second housing 102 includes a second wall 112, a second partition 122 formed on the second wall 112, a lower plate 140 formed on the lower end of the second wall 112, And a second engaging portion 152 formed at the upper end of the second wall 112 and engaged with the first engaging portion 151,
The plurality of cell accommodating portions S1 to S6 may include a plurality of first cell accommodating portions S-1 formed by the first separating portions 121 and a plurality of The second cell accommodating portion S-2 of the second cell accommodating portion S-
The upper plate 130 includes a first base plate 131 integrally formed on the upper end of the first wall 111,
A first coupling plate 132 integrally protruding from the first base plate 131,
And a first coupling hole (133) formed in the first coupling plate (132)
The first terminal member (310)
A first terminal body 311 inserted into the first coupling hole 133,
A coupling groove 312 formed at the center of the first terminal body 311,
A protrusion 313 integrally protruded from one side of the first terminal body 311 and welded to the first conductive coupling plate 210,
An engaging hole 315 which is coupled to the other end of the first terminal body 311 and is engaged with the protrusion 313 while the sealing member 314 and the first engaging plate 132 are inserted,
And a hole coupling part (316) formed at a distal end of the first terminal body (311) and inserted and coupled to a coupling hole (212) formed in the first conductive coupling plate (210) Cell enclosure for storage module (B).
5. The method of claim 4,
The first conductive coupling plate 210 may be formed of,
A unit cell coupling plate 210a to which one cell element A is welded and coupled,
A cell casing (B) for an electric energy storage device module, characterized in that it comprises a multiple cell coupling plate (210b) to which a plurality of cell elements (A) are welded and coupled.
5. The method of claim 4,
The cell case (B) for an electric energy storage device module according to claim 1, wherein the second conductive coupling plate (220) includes a plurality of cell coupling plates (220b) to which a plurality of cell elements (A) are welded.
The method according to claim 1,
The cell outer case (B) for an electric energy storage device module, wherein the housing (100) is an engineering plastic molding.
9. The method of claim 8,
In the engineering plastic formed article,
A density of 1.8 g / cm 3 or less,
A tensile strength of 145 MPa or more,
(B) for an electric energy storage device module, characterized in that at a curvature stress of 1.82 MPa, a thermal deformation temperature is 185 deg.
One or more module assemblies (M)
Characterized in that the module assembly (M) comprises a cell enclosure (B) according to any one of the claims 1 to 9.
11. The method of claim 10,
The module assembly M further includes assembly members C1 and C2 installed at the top and bottom of the cell casing B,
The assembly members C1 and C2 include a substrate 411 and a wire fixing portion 416 formed on the substrate 411. FIG.
11. The method of claim 10,
The electrical energy storage device module further comprises a module container (F) for receiving the one or more module assemblies (M).

Images