TWI518961B - Electrode assembly and radical unit for the same - Google Patents

Description

Electrode group and its basic unit

The present invention relates to an electrode group and a base unit thereof, and more particularly to an electrode group having a novel structure different from a stacked type or a stacked/folded type structure and a base unit thereof.

The secondary battery pack can be classified into various types according to the structure of the electrode group. In general, the secondary battery pack can be classified into a stacked type, a wound type (wrapped type), or a stacked/folded type according to the structure of the electrode group. The stacked structure can be obtained by separately stacking the electrode units (cathode, spacer, and anode) constituting the electrode group, and thus the precise alignment of the electrode group is very difficult. In addition, there must be a large number of procedures to make the electrode set. The stacked/folded structure is usually manufactured using two laminated devices and a folding device, so the manufacture of the electrode group is very complicated. In particular, in a stacked/folded type structure, a full cell or a bi-cell is stacked via folding, and thus the cost of such a full battery or the dual batteries is quite difficult.

One aspect of the present invention provides an electrode set that can be precisely aligned and simpled through a novel structure different from a stacked or stacked/folded structure, and a basic unit thereof.

According to an aspect of the present invention, a stackable basic unit including a first electrode, a first spacer, a second electrode, and a second spacer are sequentially arranged and combined into a four-layer structure, or the fourth The layer structure is a repetitive structure that is repeatedly arranged and combined into one. The edge of the first spacer does not engage the edge of the second spacer.

According to another aspect of the present invention, there is provided an electrode assembly including a battery stacking member, the battery stacking member comprising: (a) a structure in which a basic unit having the same number of alternately arranged and integrated electrodes is repeatedly disposed And a spacer, or (b) a structure in which at least two basic units are arranged in a predetermined order, each of the at least two basic units having the same number of electrodes and spacers that are alternately arranged and combined. The edges of adjacent spacers do not engage each other. The basic unit of (a) has a four-layer structure in which the first electrode, the first spacer, the second electrode, and the second spacer are sequentially stacked, or the four-layer structure is a repeating structure in which the stack is repeatedly stacked. The at least two basic units are each stacked one by one in a predetermined order to form a repeating structure in which the four-layer structure or the four-layer structure is repeatedly stacked.

The present invention can provide an electrode group capable of precise alignment and simple procedure through a novel structure different from a stacked type or stacked/folded type structure, and a basic unit thereof.

100a, 100b, 100c, 100d, 100e, 100f, 100g, 100h, 100i, 100j, 100k, 100l, 100m, 100n‧‧‧ battery stacking parts

110a, 110b, 110c, 110d, 110e‧‧‧ basic unit

111‧‧‧First electrode

112‧‧‧First spacer

113‧‧‧second electrode

114‧‧‧Second spacer

1101a, 1102a, 1103a‧‧‧

121‧‧‧First electrode material

122‧‧‧First spacer material

123‧‧‧Second electrode material

124‧‧‧Second spacer material

C1, C2, C3‧‧‧ cutting knife

L1, L2‧‧‧ laminating machine

130a, 130b, 130c, 130d, 130e, 130f‧‧‧ first auxiliary unit

116‧‧‧End electrode

140a, 140b, 140c, 140d, 140e, 140f‧‧‧ second auxiliary unit

117‧‧‧End spacers

1 is a side view showing a first structure of a basic unit of the present invention; FIG. 2 is a side view showing a second structure of a basic unit of the present invention; and FIG. 3 is a view showing a basic unit formed by stacking FIG. 4 is a side view showing a third structure of the basic unit of the present invention; FIG. 5 is a side view showing a fourth structure of the basic unit of the present invention; A side view of a battery stacking member formed by stacking the basic unit of FIG. 4 and the basic unit of FIG. 5; FIG. 7 is a flow chart illustrating a method of manufacturing the basic unit of the present invention; and FIG. 8 is a diagram showing different sizes by stacking A perspective view of a battery stacking member formed by the basic unit; FIG. 9 is a side view illustrating the battery stacking member of FIG. 8; and FIG. 10 is a view showing a battery stacking member formed by stacking basic units having different geometries 1 is a side view showing a first structure of a battery stacking member including a base unit and a first auxiliary unit according to the present invention; and FIG. 12 is a view showing a basic unit and a first auxiliary unit according to the present invention. Side view of a second structure of a battery stacking unit of a unit; FIG. 13 is a side view showing a third structure of a battery stacking member including a base unit and a second auxiliary unit according to the present invention; FIG. Side view of a fourth structure of a battery stacking member including a base unit and a second auxiliary unit; FIG. 15 is a side view showing a fifth structure of a battery stacking member including a base unit and a first auxiliary unit according to the present invention; Figure 16 is a side view showing a sixth structure of a battery stacking member including a base unit and a first auxiliary unit according to the present invention; and Figure 17 is a view showing a battery stacking unit including a base unit and a second auxiliary unit according to the present invention; Side view of a seventh structure; FIG. 18 is a side view showing an eighth structure of a battery stacking member including a base unit and a second auxiliary unit according to the present invention; FIG. 19 is a view showing a basic unit according to the present invention and Side view of a ninth structure of a battery stacking component of a first auxiliary unit; FIG. 20 is a diagram illustrating a basic unit, a first auxiliary unit, and a second auxiliary sheet according to the present invention A side view of a tenth structure of a battery stacking member; and FIG. 21 is a side view showing an eleventh structure of a battery stacking member including a base unit and a second auxiliary unit according to the present invention.

Exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the invention is not limited or limited to the following exemplary embodiments.

The electrode group of the present invention includes a battery stacking member. The battery The stacked component has a structure obtained by repeatedly configuring one basic unit or by configuring at least two basic units in a predetermined order (for example, alternately). Therefore, the basic unit is explained first below.

[Structure of basic unit]

In the electrode group of the present invention, the basic unit is alternated Formed by arranging electrodes and spacers. Here, the same number of electrodes and spacers are configured. For example, as illustrated in FIG. 1, the base unit 110a can be formed by stacking two electrodes 111 and 113 and two spacers 112 and 114. Here, the cathode and the anode may naturally face each other through the spacer. When the basic unit is formed as described above, the electrode 111 is positioned at one side of the base unit (see the electrodes 111 in FIGS. 1 and 2), and the spacer 114 is positioned at the other end of the base unit (see The spacers 114 in Figures 1 and 2).

The basic feature of the electrode assembly of the present invention is that the battery stack The components or electrode groups are formed only by stacking the basic units. That is, the essential feature of the present invention is that the battery stacking member is formed by repeatedly stacking one basic unit or stacking at least two basic units in a predetermined order. In order to achieve the above features, the basic unit may have the following structure.

First, the basic unit can stack the first electricity by sequentially The pole, the first spacer, the second electrode, and the second spacer are formed. In more detail, the first electrode 111, the first spacer 112, the second electrode 113, and the second spacer 114 may be sequentially stacked from the upper side to the lower side (as shown in FIG. 1). Shown, or sequentially stacked from the lower side to the upper side (as illustrated in FIG. 2) to form the basic units 110a and 110b. The basic unit having the above structure may be referred to as a first basic unit. Here, the first electrode 111 and the second electrode 113 may be electrodes of opposite types. For example, when the first electrode 111 is a cathode, the second electrode 113 may be an anode.

As described above, when the basic unit is stacked first by sequentially When the electrode 111, the first spacer 112, the second electrode 113, and the second spacer 114 are formed, the battery stacking member 100a can be formed only by repeatedly stacking the one basic unit 110a, as illustrated in FIG. Here, the basic unit may have an eight-layer structure or a twelve-layer structure in addition to the four-layer structure. That is, the basic unit may have a repeating structure in which the four-layer structure is repeatedly arranged. For example, the basic unit may stack the first electrode 111, the first spacer 112, the second electrode 113, the second spacer 114, the first electrode 111, the first spacer 112, the second electrode 113, and the second by sequentially The spacer 114 is formed.

Alternatively, the basic unit can stack the first electrodes in sequence 111, the first spacer 112, the second electrode 113, the second spacer 114, the first electrode 111 and the first spacer 112 are formed, or by sequentially stacking the second electrode 113, the second spacer 114, and the first The electrode 111, the first spacer 112, the second electrode 113, and the second spacer 114 are formed. A basic unit having the former structure may be referred to as a second basic unit, and a basic unit having the latter structure may be referred to as a third basic unit.

In more detail, the second basic unit 100c may stack the first electrode 111, the first spacer 112, and the second by sequentially sequentially from the upper side to the lower side. The electrode 113, the second spacer 114, the first electrode 111, and the first spacer 112 are formed as illustrated in FIG. Moreover, the third basic structure 110d can stack the second electrode 113, the second spacer 114, the first electrode 111, the first spacer 112, the second electrode 113, and the second spacer 114 from the upper side to the lower side in sequence. Formed as illustrated in Figure 5. As mentioned before, the stacking can be performed sequentially from the lower side to the upper side.

When one of the second basic units 110c and the third base are stacked In one of the units 110d, a repeating structure in which the four-layer structure is repeatedly stacked can be formed. As such, when the second basic unit 110c and the third basic unit 110d are alternately stacked one by one, the battery stacking member 100b can be formed only by stacking the second and third basic units, as illustrated in FIG.

As described above, the basic unit of the present invention has a The four-layer structure of the first electrode, the first spacer, the second electrode, and the second spacer is stacked, or has a repeating structure in which the four-layer structure is repeatedly stacked. Further, at least two basic units in the present invention are stacked on each other in a predetermined order to form a repeating structure of a four-layer structure or a four-layer structure repeating configuration. For example, the first basic unit itself forms a four-layer structure, and the second basic unit and the third basic unit form a twelve-layer structure by stacking each other (ie, a total of two basic units).

As such, the battery stacking member or electrode group can be formed only by stacking (ie, by repeatedly stacking one basic unit or stacking at least two basic units in a predetermined order).

The battery stacking member of the present invention can be formed by stacking basic units one by one. That is, the battery stacking component can form the basic single The elements are then fabricated by repeating or stacking the basic units in a predetermined order. As described above, the battery stacking member of the present invention can be formed only by stacking the basic units. Thus, the basic unit of the invention can be aligned very accurately. When the basic unit is precisely aligned, the electrodes and spacers can also be precisely aligned within the stack of cells. In addition, the productivity of the battery stacking member or electrode group can be improved. This is achieved because the manufacturing method is very simple.

[Manufacture of basic unit]

A method of manufacturing the first basic unit will be exemplarily described with reference to FIG. First, a first electrode material 121, a first spacer material 122, a second electrode material 123, and a second spacer material 124 are prepared. Here, the first spacer material 122 and the second spacer material 124 may be the same. The first electrode material 121 is cut into a specific size via a cutter C1, and the second electrode material 123 is cut into a specific size via a cutter C2. The first electrode material 121 is then stacked on the first spacer material 122 and the second electrode material 123 is stacked on the second spacer material 124.

Then, the electrode materials and the spacer materials are preferably attached to each other via the laminators L1 and L2. Via this attachment, a basic unit in which the electrode and the spacer are combined into one body can be formed. This combination method can be quite diverse. The laminators L1 and L2 can apply pressure to the materials or apply pressure and heat to the materials to attach the materials to each other. Due to this attachment, the stacking of the basic units can be made easier when manufacturing the battery stacking components. Moreover, the alignment of the basic unit can be easily achieved due to the attachment. After the attachment, the first spacer material is passed through the cutter C3 The second spacer material 124 is cut to a specific size to make the base unit 110a. The edges of the spacers do not engage each other during this procedure.

As described above, in the base unit, the electrodes can be attached to adjacent Spacer. Alternatively, the spacers can be attached to adjacent electrodes. Here, it is preferred that the entire surface of the electrode facing the adjacent spacer is attached to the adjacent spacer. In this case, the electrode can be stably fixed to the spacer. Typically, the size of the electrode is less than the size of the spacer.

To this end, an adhesive can be applied to the spacer. However, when When an adhesive is used, the adhesive must be applied to the adhesive surface of the spacer in a mesh or dot shape. This is because if the adhesive is applied tightly to the entire adhesive surface, reactive ions such as lithium ions cannot pass through the spacer. As such, when an adhesive is used, it is difficult to closely attach the entire surface of the electrode to the adjacent spacer.

Or, use a spacer that includes a coating with adhesion The electrodes can be made substantially attached to the spacer. This will be described in more detail below. The spacer may comprise a porous spacer matrix material (such as a polyolefin-based spacer matrix material) and a porous coating typically applied to one or both sides of the spacer matrix material. Here, the coating layer may be formed of a mixture of inorganic particles and a binder polymer in which the inorganic particles are bonded and fixed to each other.

Here, the inorganic particles can improve the thermal stability of the spacer. That is, the inorganic particles can prevent the spacer from shrinking at a high temperature. In addition, the binder polymer can be immobilized from the inorganic particles to improve the mechanical stability of the spacer. Again, the binder polymer can attach the electrodes to the spacer. Stick to the foregoing In contrast, since the binder polymer is usually distributed in the coating, the electrode can be closely adhered to the entire adhesive surface of the spacer. As such, when the spacer is used as described above, the electrode can be more stably fixed to the spacer. In order to enhance the adhesion, the above laminating machine can be used.

The inorganic particles may have a densely packed structure for the entire A gap volume is formed between the inorganic particles on the coating. Here, the pore structure can be formed in the coating by the interstitial volume defined by the inorganic particles. Due to the pore structure, even if a coating is formed on the spacer, lithium ions can smoothly pass through the spacer. For reference, the interstitial volume defined by the inorganic particles can be blocked by the binder polymer depending on its location.

Here, the densely packed structure can be interpreted as gravel containment The structure in the glass bottle. Thus, when the inorganic particles form a densely packed structure, the gap volume between the inorganic particles is not locally formed in the coating layer, but is substantially formed in the coating layer. Therefore, as the size of each inorganic particle increases, the size of the pore formed by the gap volume also increases. Due to the structure of the dense packing described above, lithium ions can smoothly pass through the spacer over the entire surface of the spacer.

The basic units in the battery stacking parts can also adhere to each other. For example, if an adhesive or the above coating is applied to the bottom surface of the second spacer 114 in FIG. 1, another basic unit may be adhered to the bottom surface of the second spacer 114.

Here, between the electrode and the spacer in the basic unit The adhesion strength can be greater than the adhesion strength between the basic units in the stack of cells. It should be understood that adhesion between the basic units may not be provided. degree. In this case, when the electrode group or the battery stacking member is disassembled, the electrode group can be separated into a basic unit due to the difference in adhesion strength. For reference, the adhesion strength can be expressed as delamination strength. For example, the adhesion strength between the electrode and the spacer can be expressed as the force required to separate the electrode from the spacer. In this way, adjacent base units are not combined with each other in the battery stacking member, or can be combined with each other in the battery stacking member by a combined strength different from the combined strength between the electrode and the spacer in the base unit. combination.

For reference, when the spacer comprises the above coating, Ultrasonic welding on the spacer is not appropriate. Typically, the spacer is larger in size than the electrode. Thus, an attempt can be made to bond the edges of the first spacer 112 to the edges of the second spacer 114 via ultrasonic welding. Here, the object to be welded must be directly pressurized via the corner of the ultrasonic welding. However, when the edge of the spacer is directly pressurized via the corner, the spacer will adhere to the corner due to the coating having adhesive strength. Therefore, the splice device may malfunction.

[Modification of basic unit]

Basic units having the same size will be explained. however, The basic units can have different sizes. When stacking basic units having different sizes, battery stacking members having different shapes can be manufactured. Here, the size of the base unit is explained with reference to the size of the spacer because the spacer is generally larger than the electrode.

Referring to Figures 8 and 9, a plurality of basic units are prepared and can be It is divided into at least two groups of different sizes (see reference numerals 1101a, 1102a, and 1103a in Fig. 9). By stacking the basic units according to the sizes, the battery stacking part 100c having a structure of a plurality of stages can be formed. 8 and 9 illustrate an embodiment including three stages of battery stacking members obtained by stacking three groups of basic units 1101a, 1102a, and 1103a, in which basic unit stacks having the same size are illustrated Together. For reference, the basic units included in one group may form two or more stages.

When a plurality of steps are formed as described above, it is preferred that the basic unit has a structure of the first basic unit, that is, the above-described four-layer structure or the four-layer structure is a repeating structure in which the stacking is repeated. (Here, even if the basic units have the same stacked structure but have different sizes, the basic units are considered to be included in one basic unit.)

Preferably, the same number of cathodes and anodes are stacked in one stage. Further, it is preferably between one step and the other, and the electrodes are opposed to each other via the spacer. For example, in the case of the second and third basic units, there must be two basic units to form one order.

However, in the first basic unit, only one basic unit is required to form one step, as illustrated in FIG. Therefore, when the basic unit has a four-layer structure or the repeated structure in which the four-layer structure is repeatedly stacked, even if a plurality of stages are formed, the number of kinds of the basic units is reduced.

Also, in the case of the second and third basic units, at least one of the two basic units must be stacked to form one step. As such, the one order can have at least a twelve layer structure. However, in the first basic unit In this case, only one basic unit has to be stacked to form one step. As such, one order can have at least four layers of structure. As a result, when the basic unit has a four-layer structure or the repeated structure in which the four-layer structure is repeatedly stacked, the thickness of each step can be easily controlled when a plurality of stages are formed.

The basic unit can not only have different sizes, but also have Same geometry. For example, the base unit can have different sizes and different edge shapes, and may or may not have through holes, as illustrated in FIG. More specifically, as illustrated in FIG. 10, a plurality of basic units divided into three groups can form three steps by stacking the basic units having the same geometry. To this end, the basic unit can be divided into at least two groups (each group having a different geometry). Similarly, the basic unit preferably has a four-layer structure or a repeating structure in which the four-layer structure is repeatedly stacked, that is, the structure of the first basic unit. (Here, even if the basic units have the same stacked structure but have different geometries, the basic units are considered to be included in one basic unit.)

[Auxiliary unit]

The battery stacking component may additionally include at least one of the first auxiliary unit and/or the second auxiliary unit. First, the first auxiliary unit will be described below. In the present invention, the electrode system is positioned at one side of the base unit, and the spacer is positioned at the other side of the base unit. When the repeating structures are sequentially stacked, the electrodes may be positioned at the uppermost or lowermost portion of the battery stacking component (see reference numeral 116 of FIG. 11 and this electrode may be referred to as the tip electrode 116). The first auxiliary unit is additionally stacked on the terminal electrode.

In more detail, when the terminal electrode 116 is a cathode, the first An auxiliary unit 130a can be formed by sequentially stacking the end electrode 116, the spacer 114, the anode 113, the spacer 112, and the cathode 111 outward, as illustrated in FIG. On the other hand, when the terminal electrode 116 is an anode, the first auxiliary unit 130b can be formed by sequentially stacking the terminal electrode 116, the spacer 114, and the cathode 113 outward, as illustrated in FIG.

In the battery stacking parts 100d and 100e, the cathode can pass through Positioned at the outermost portion by the first auxiliary units 130a and 130b, as illustrated in FIGS. 11 and 12. In this case, in the cathode positioned at the outermost portion (i.e., the cathode of the first auxiliary unit), the active material layer is preferably coated only on one side of the basic unit in the both sides of the current collector. (in Figure 11 is the side facing down). When one side of the current collector is coated with an active material layer as described above, the active material layer is not located at the outermost portion of the battery stacking member. In this way, waste of the active material layer can be avoided. For reference, since the cathode emits, for example, lithium ions, the capacity of the battery pack can be improved when the cathode is positioned at the outermost portion.

Next, the second auxiliary unit will be described below. The second auxiliary The helper unit performs the same function as the first auxiliary unit and will be described in more detail below. In the present invention, the electrode system is positioned at one side of the base unit, and the spacer is positioned at the other side of the base unit. When the basic units are sequentially stacked, the spacers may be positioned at the uppermost or lowermost portion of the battery stacking member (see reference numeral 117 of FIG. 13 and this spacer may be referred to as the end spacer 117). The second auxiliary unit is additionally stacked at the end On the end spacer.

In more detail, when contacting the electrode of the end spacer 117 When 113 is the cathode in the basic unit, the second auxiliary unit 140a can be formed by sequentially stacking the end spacer 117, the anode 111, the spacer 112, and the cathode 113, as illustrated in FIG. On the other hand, when the electrode 113 contacting the end spacer 117 is the anode in the basic unit, the second auxiliary unit 140b may be formed as the cathode 111 as illustrated in FIG.

In the battery stacking parts 100f and 100g, the cathode can pass through Positioned at the outermost portion of the end spacer by the second auxiliary unit 140a and 140b, as illustrated in Figures 13 and 14. In this case, in the cathode positioned at the outermost portion (ie, the cathode of the second auxiliary unit), the active material layer is preferably coated only on one side of the base unit in the both sides of the current collector. (on the side facing up in Fig. 13), similar to the cathode of the first auxiliary unit.

The first auxiliary unit and the second auxiliary unit may have the above Different structure. First, the first auxiliary unit will be described below. When the terminal electrode 116 is a cathode as illustrated in FIG. 15, the first auxiliary unit 130c may be formed by sequentially stacking the terminal electrode 116, the spacer 114, and the anode 113. On the other hand, when the terminal electrode 116 is an anode as illustrated in FIG. 16, the first auxiliary unit 130d can be formed by sequentially stacking the terminal electrode 116, the spacer 114, the cathode 113, the spacer 112, and the anode 111.

In the battery stacking parts 100h and 100i, the anode can be via The first auxiliary units 130c and 130d are positioned at the outermost position of the terminal electrodes Portions are illustrated in Figures 15 and 16.

Next, the second auxiliary unit will be described below. As shown in Figure 17 As shown, when the electrode 113 contacting the end spacer 117 is the cathode in the basic unit, the second auxiliary unit 140c may be formed as the anode 111. As illustrated in FIG. 18, when the electrode 113 contacting the end spacer 117 is an anode in the basic unit, the second auxiliary unit 140d can be formed by sequentially stacking the end spacer 117, the cathode 111, the spacer 112, and the anode 113. . In the battery stacking parts 100j and 100k, the anodes may be positioned at the outermost portions of the end spacers via the second auxiliary units 140c and 140d, as illustrated in FIGS. 17 and 18.

For reference, the anode reacts with the aluminum layer of the battery pack housing (eg, the pouch type housing) due to the potential difference. Therefore, the anode is preferably insulated from the battery pack casing by a spacer. To this end, the first and second auxiliary units of Figures 15 through 18 may additionally include a spacer at the outer portion of the anode. For example, the first auxiliary unit 130e in FIG. 19 may additionally include a spacer 112 at its outermost portion, as compared to the first auxiliary unit 130c in FIG. For reference, when the auxiliary unit includes a spacer, alignment of the auxiliary unit in the basic unit can be easily performed.

The battery stacking part 100m can be formed as illustrated in FIG. The base unit 110b can be formed by sequentially stacking the first electrode 111, the first spacer 112, the second electrode 113, and the second spacer 114 from the lower portion to the upper portion. In this case, the first electrode 111 may be a cathode, and the second electrode 113 may be an anode.

The first auxiliary unit 130f can stack the terminal electrodes in sequence 116, spacer 114, anode 113, spacer 112 and cathode 111 are formed. In this case, in the cathode 111 of the first auxiliary unit 130f, only one side of the current collector facing the base unit 110b may be coated with the active material layer among the two sides of the current collector.

Moreover, the second auxiliary unit 140e can stack the ends by sequentially The spacer 117, the cathode 111 (first cathode), the spacer 112, the anode 113, the spacer 114, and the cathode 118 (second cathode) are formed. In this case, the cathode 118 (second cathode) of the second auxiliary unit 140e is positioned at the outermost portion, and only one side of the current collector facing the basic unit 110b can be coated with the active material layer in both sides of the current collector. cover.

Finally, the battery stacking component 100n can be as illustrated in FIG. Formed. The base unit 110e can be formed by sequentially stacking the first electrode 111, the first spacer 112, the second electrode 113, and the second spacer 114 from the upper portion to the lower portion. In this case, the first electrode 111 may be an anode, and the second electrode 113 may be a cathode. Moreover, the second auxiliary unit 140f can be formed by sequentially stacking the end spacer 117, the anode 111, the spacer 112, the cathode 113, the spacer 114, and the anode 119.

110a‧‧‧Basic unit

111‧‧‧First electrode

112‧‧‧First spacer

113‧‧‧second electrode

114‧‧‧Second spacer

Claims (19)

An electrode assembly comprising: a battery stacking component comprising: a structure in which a basic unit is repeatedly disposed, the one basic unit having the same number of electrodes and spacers that are alternately arranged and integrated, wherein adjacent spacers The edges are not joined to each other, wherein the one basic unit has a four-layer structure in which the first electrode, the first spacer, the second electrode, and the second spacer are sequentially stacked together, or the four-layer structure is repeated in a repeated stack a structure; and wherein an adhesion strength between the basic units in the battery stacking member is less than an adhesion strength between the electrode in the base unit and the adjacent spacer. The electrode group of claim 1, wherein a plurality of the basic units are provided, and the plurality of the basic units are divided into at least two groups having different sizes, and wherein the battery stacking member has a size by Stacking a plurality of structures of the plurality of stages formed by the one basic unit. The electrode group of claim 1, wherein a plurality of the basic units are provided, and the plurality of the basic units are divided into at least two groups having different geometric shapes, and wherein the battery stacking member has The geometric shape stacks a plurality of structures of the plurality of stages formed by the one basic unit. The electrode assembly of claim 1, wherein the electrode system is attached to an adjacent spacer in each of the basic units. The electrode assembly of claim 4, wherein the entire surface of the electrode facing the adjacent spacer is attached to the adjacent spacer. The electrode assembly of claim 4, wherein the attachment between the electrode and the spacer is performed by applying pressure to the electrode and the adjacent spacer, or by the electrode and the adjacent spacer Pressure and heat are provided. The electrode assembly of claim 4, wherein the spacer comprises a porous spacer matrix material and a porous coating applied to an entire surface of one or both sides of the spacer matrix material, wherein the porous coating layer comprises inorganic particles And a mixture of binder polymers, wherein the binder polymer bonds and fixes the inorganic particles to each other, and wherein the electrode is attached to the adjacent spacer by the coating. The electrode group of claim 7, wherein the inorganic particles of the porous coating have a densely packed structure to form a gap volume between the inorganic particles on the entire coating layer, and wherein the porous structure is by the inorganic The interstitial volume defined by the particles is formed in the coating. The electrode assembly of claim 1, wherein the battery stacking component further comprises a first auxiliary unit stacked on a terminal electrode of the uppermost or lowermost electrode, wherein the first auxiliary unit is when the terminal electrode is a cathode Formed by sequentially stacking spacers, anodes, spacers, and cathodes from the end electrode, and Wherein, when the terminal electrode is an anode, the first auxiliary unit is formed by sequentially stacking a spacer and a cathode from the terminal electrode. The electrode group of claim 9, wherein the cathode of the first auxiliary unit comprises: a current collector; and an active material, wherein the active material is coated only on one side of the current collector On the side. The electrode assembly of claim 1, wherein the battery stacking component further comprises a second auxiliary unit stacked on the end spacer of the uppermost or lowermost spacer, wherein the electrode contacting the end spacer is The cathode in the base unit is formed by sequentially stacking the anode, the spacer and the cathode from the end spacer, and wherein the electrode contacting the end spacer is an anode in the base unit At the time, the second auxiliary unit is formed as a cathode. The electrode group of claim 11, wherein the cathode of the second auxiliary unit comprises: a current collector; and an active material, wherein the active material is coated only on one side of the current collector On the side. The electrode assembly of claim 1, wherein the battery stacking component further comprises a first auxiliary unit stacked on a terminal electrode of the uppermost or lowermost electrode, wherein the first auxiliary unit is when the terminal electrode is a cathode By Forming a spacer and an anode sequentially from the end electrode, and wherein, when the end electrode is an anode, the first auxiliary unit sequentially stacks a spacer, a cathode, a spacer, and the like from the end electrode The anode is formed. The electrode assembly of claim 13, wherein the first auxiliary unit further comprises a spacer on an outermost side of the anode. The electrode assembly of claim 1, wherein the battery stacking component further comprises a second auxiliary unit stacked on the end spacer of the uppermost or lowermost spacer, wherein the electrode contacting the end spacer is the basic When the cathode in the unit is formed, the second auxiliary unit is formed as an anode, and wherein when the electrode contacting the end spacer is an anode in the basic unit, the second auxiliary unit is from the end spacer The cathode, the spacer and the anode are stacked in sequence. The electrode assembly of claim 15, wherein the second auxiliary unit further comprises a spacer on an outermost side of the anode. The electrode assembly of claim 1, wherein the battery stacking component further comprises a second auxiliary unit stacked on the end spacer of the uppermost or lowermost spacer, and wherein the electrode contacting the end spacer is In the anode of the basic unit, the second auxiliary unit is formed by sequentially stacking the first cathode, the spacer, the anode, the spacer and the second cathode from the end spacer. The electrode group of claim 17, wherein the second cathode of the second auxiliary unit comprises: a current collector; and an active material, the active material being coated only on one side facing the base unit in both sides of the current collector. The electrode assembly of claim 1, wherein the battery stacking component further comprises a second auxiliary unit stacked on the end spacer of the uppermost or lowermost spacer, and wherein the electrode contacting the end spacer is In the cathode of the basic unit, the second auxiliary unit is formed by sequentially stacking the first anode, the spacer, the cathode, the spacer and the second anode from the end spacer.