KR102594549B1 - Internal electrode lead type electric energy storage cell with protruding contact terminals - Google Patents

Abstract

The present invention relates to an internal electrode lead-type electric energy storage cell having a protruding contact terminal. According to an embodiment of the present invention, an internal electrode lead-type electric energy storage cell having a protruding contact terminal includes a cathode material and a positive electrode material. An electrode sheet provided with one or more electrode bodies constituting a separator between them; A negative electrode lead provided on one side of the electrode sheet and connected to the negative electrode material; A positive electrode lead provided on the other side of the electrode sheet and connected to the positive electrode material; A packing material that surrounds and packs the electrode sheet, negative electrode lead, and positive electrode lead; A negative electrode contact terminal protrudes through the packing material on an extension line of the negative electrode lead, forming a first wrinkle pattern, and protrudes through the packing material on an extension line of the positive electrode lead, and the first wrinkle pattern It may be configured to include a positive contact terminal that forms a second wrinkle pattern that fits.

Description

Internal electrode lead type electric energy storage cell with protruding contact terminals}

The present invention relates to an internal electrode lead-type electric energy storage cell having an electrode lead inside a packing material for packing an electric energy storage cell, and to an internal electrode lead-type electric energy storage cell having a protruding contact terminal connected to the internal electrode lead. It's about.

Recently, as technology development and demand for mobile devices increase, the demand for pouch-type electric energy storage cells as an energy source is rapidly increasing.

Specifically, the pouch-type electric energy storage cell may be used in the form of a single electric energy storage cell, depending on the type of external device for which it is used, or as an electric energy storage module in which multiple electric energy storage cells are electrically connected. It is also used in the form of

For example, small devices such as mobile phones can operate for a certain period of time with the output and capacity of one electric energy storage cell, while laptop computers, portable DVDs (Portable DVDs), small PCs (Personal Computers), electric vehicles, Medium or large devices such as hybrid electric vehicles require the use of an electric energy storage module containing a plurality of electric energy storage cells due to issues of output and capacity, and the electric energy storage module consists of a plurality of electric energy storage cells in series and/or Alternatively, it is manufactured by connecting a protection circuit, etc. to core packs arranged and connected in parallel.

At this time, when using a pouch-type electric energy storage cell, it can be easily manufactured by stacking the large surfaces so that they face each other and then connecting the electrode terminals with a connecting member such as a bus bar.

Therefore, when manufacturing a three-dimensional electric energy storage module with a hexahedral structure, it is advantageous to use a pouch-type electric energy storage cell.

Previously, nickel cadmium batteries or hydrogen ion batteries were used as pouch-type electric energy storage cells, but recently, lithium-ion batteries and lithium polymer batteries with high energy density and high charge/discharge potential have been widely used, and these pouch-type electric energy storage cells Demand is increasing due to the advantages described above.

Meanwhile, pouch-type electric energy storage cells are manufactured through a process of assembling the cell and activating the cell. In the cell activation step, the pouch-type electric energy storage cell is mounted on a predetermined jig and the conditions necessary for activation are met. Discharge is performed.

At this time, since the pouch-type electric energy storage cell with internal electrode leads inside the cell cannot be charged or discharged by connecting a charging wire, etc., the pouch-type electric energy storage cell is disclosed in Korean Patent No. 10-1488054. The method of charging and discharging is carried out by tightly contacting the battery under pressure using a pressurizing device such as “Jig for charging and discharging secondary batteries” or “Jig for low-resistance charging and discharging” disclosed in Korean Patent No. 10-1428133. It has been done.

However, pouch-type electric energy storage cells use aluminum laminate sheets, etc. as exterior members. In order to achieve a high charge/discharge rate through these exterior members, high pressure was applied, which resulted in the pouch-type electric energy storage cells It was a problem that caused the risk of damage.

Therefore, there was a need for the development of an electric energy storage cell that allows efficient charging and discharging even at lower pressure.

The present invention is an invention proposed to solve the above-mentioned problems, and in the internal electrode lead type electric energy storage cell that must be charged and discharged by being in close contact with the internal electrode leads, smooth charging and discharging can be achieved even if the pressure of contact is lowered. Provides an internal electrode lead-type electrical energy storage cell that can exhibit discharge efficiency, facilitates current transfer between electrical energy storage cells, and has protruding contact terminals that are formed to be mounted with balance between electrical energy storage cells in an electrical energy storage module. The purpose is to do this.

An internal electrode lead-type electric energy storage cell having a protruding contact terminal according to an embodiment of the present invention to solve the above problem is an electrode sheet provided with one or more electrode bodies constituting a separator between the cathode material and the anode material. ; A negative electrode lead provided on one side of the electrode sheet and connected to the negative electrode material; A positive electrode lead provided on the other side of the electrode sheet and connected to the positive electrode material; A packing material that surrounds and packs the electrode sheet, negative electrode lead, and positive electrode lead; A negative electrode contact terminal protrudes through the packing material on an extension line of the negative electrode lead, forming a first wrinkle pattern, and protrudes through the packing material on an extension line of the positive electrode lead, and the first wrinkle pattern It may be configured to include a positive contact terminal that forms a second wrinkle pattern that fits.

In addition, an internal electrode lead-type electric energy storage cell having a protruding contact terminal according to another embodiment of the present invention for solving the above problem is provided with one or more electrode bodies constituting a separator between the negative electrode material and the positive electrode material. electrode sheet; A negative electrode lead provided on one side of the electrode sheet and connected to the negative electrode material; A positive electrode lead provided on the other side of the electrode sheet and connected to the positive electrode material; A packing material that surrounds and packs the electrode sheet, negative electrode lead, and positive electrode lead; A negative contact terminal protruding through the packing material on an extension line of the negative electrode lead and forming a first corner formed of a positive or negative pattern or a combination of positive and negative patterns, and on an extension line of the positive electrode lead. It may be configured to include a positive contact terminal that protrudes through the packing material and forms a second angle portion of a positive or negative pattern or a combination of positive and negative patterns that fits into the first angle formed on the negative contact terminal.

Here, the negative electrode lead and the positive electrode lead may each be interposed between the electrode sheet and the packing material in a folded state in at least one stage.

Additionally, the negative electrode lead and the positive electrode lead may each form a bent piece that is bent to contact one side of the electrode sheet at an inner end located inside the electrode sheet.

Additionally, the embossed or engraved pattern may be a zigzag pattern in which the 'ㄷ' shape alternates between the left and right sides to form a length, or it may be a '+' shaped pattern.

Meanwhile, the internal electrode lead-type electric energy storage cell having a protruding contact terminal according to one or another embodiment is the center of the double wing tape where the first wing tape and the second wing tape are formed on the upper and lower sides, respectively. The negative contact terminal or the positive contact terminal may be inserted through the tape, the first wing tape may be attached to a packing material, and the second wing tape may be attached to the negative contact terminal or the positive contact terminal.

Here, the first wing tape may form an area larger than the area of the through hole provided in the packing material so that the negative contact terminal and the positive contact terminal protrude out of the packing material.

An internal electrode lead-type electric energy storage cell having a protruding contact terminal according to an embodiment of the present invention is an internal electrode lead-type electric energy storage cell that must be charged and discharged by being in close contact with the internal electrode lead. Even when the pressure is lowered, smooth charging and discharging efficiency can be achieved, current is easily transmitted between electrical energy storage cells, and the electrical energy storage module is formed to be mounted with a balance between the electrical energy storage cells, thereby increasing the efficiency of the electrical energy storage module. You can.

In addition, the effects according to the embodiments of the present invention mentioned above are not limited to the contents described, and may further include all effects predictable from the specification and drawings.

1 is a perspective view of an internal electrode lead-type electrical energy storage cell having a protruding contact terminal according to an embodiment of the present invention.
Figure 2 is a bottom perspective view of the electrical energy storage cell of Figure 1;
FIG. 3 is a side cross-sectional view of the electrical energy storage cell of FIG. 1.
FIG. 4 is a diagram illustrating the use of the electric energy storage cell of FIG. 1.
Figure 5 is a perspective view of an internal electrode lead-type electric energy storage cell having a protruding contact terminal according to another embodiment of the present invention.
Figure 6 is a bottom perspective view of the electrical energy storage cell of Figure 5;
FIG. 7 is an example of the use of the electric energy storage cell of FIG. 5.
Figures 8 (a) and (b) are diagrams showing examples of various forms of the protruding contact terminal of Figure 5.
Figure 9 is a diagram illustrating a state in which a double-wing tape is attached to an internal electrode lead-type electric energy storage cell having a protruding contact terminal according to an embodiment of the present invention.
Figures 10 (a) and (b) are diagrams illustrating the process of attaching the double wing tape of Figure 9.
Figure 11 is an enlarged view showing a state in which the double wing tape of Figure 9 is attached.

Hereinafter, the description of the present invention with reference to the drawings is not limited to specific embodiments, and various changes may be made and various embodiments may be possible. In addition, the content described below should be understood to include all conversions, equivalents, and substitutes included in the spirit and technical scope of the present invention.

In the following description, the terms first, second, etc. are terms used to describe various components, and their meaning is not limited, and is used only for the purpose of distinguishing one component from other components.

Like reference numerals used throughout this specification refer to like elements.

As used herein, singular expressions include plural expressions, unless the context clearly dictates otherwise. In addition, terms such as “comprise,” “provide,” or “have” used below are intended to designate the presence of features, numbers, steps, operations, components, parts, or a combination thereof described in the specification. It should be construed and understood as not excluding in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

Meanwhile, the internal electrode lead-type electric energy storage cell having a protruding contact terminal according to an embodiment of the present invention will be described below limited to the pouch-type electric energy storage cell 100, which is the most preferred form, to facilitate understanding. It should be understood that the application is not limited to the pouch-type electrical energy storage cell 100, but can be applied to all various electrical energy storage cells 100 in which electrode leads are formed. That is, the electric energy storage cell 100 described below is shown in the drawing as a pouch shape, but is not limited to a square shape, pouch shape, or circular shape.

In addition, the electrical energy storage cell 100 may preferably be a super capacitor cell, but is not limited to this, and various electrical energy storage cells capable of storing electrical energy, such as lithium-ion battery cells and lithium-ion capacitor cells, can be used. .

Hereinafter, an internal electrode lead-type electric energy storage cell having a protruding contact terminal according to an embodiment of the present invention will be described in detail with reference to the attached drawings.

1 is a perspective view of an internal electrode lead-type electrical energy storage cell having a protruding contact terminal according to an embodiment of the present invention.

First, referring to FIG. 1, an internal electrode lead-type electric energy storage cell 100 having a protruding contact terminal according to an embodiment of the present invention is surrounded by a packing material 140 and one surface of the packing material 140 One contact terminal may protrude to the outside.

Here, the protruding contact terminal is one of the negative contact terminal 150 (shown in FIG. 4) and the positive contact terminal 160 (shown in FIG. 4), which will be described later, and the protruding contact terminal is inserted into the packing material 140. It may be formed to extend from the negative electrode lead (120, shown in FIG. 4) or the positive electrode lead (130, shown in FIG. 4) connected to the provided electrode sheet (110, shown in FIG. 4), and the connected electrode lead Depending on the polarity, the contact terminal may have positive or negative polarity.

For example, in the case of a contact terminal extending from the negative electrode lead 120, it is a negative contact terminal 150 with negative polarity, and in the case of a contact terminal extending from the positive electrode lead 130, it is a positive contact terminal 160 with positive polarity. ) can be.

Here, the electrode sheet 110 is a sheet formed by stacking one or more electrode bodies (not shown) constituting a separator between the negative electrode material and the positive electrode material, and is made of a normal current collector and active material, etc. It can be formed to transmit current to an active material (not shown) according to the charging and discharging process, or to receive current from the active material so that the electric energy storage cell 100 is charged with current or the electric energy storage cell The current of (100) can be discharged.

The protruding contact terminal extends from the electrode lead connected to the cathode material or anode material of the electrode sheet 110 and exhibits the properties of a cathode or anode, and thus contacts the contact terminal of the other pole provided in the other electric energy storage cell 100b. It may be configured to transmit current to another electric energy storage cell 100b or to receive current from another electric energy storage cell 100b.

In the present invention, to facilitate understanding, the contact terminal shown in FIG. 1 is referred to as the negative contact terminal 150, and the contact terminal shown in FIG. 2 is referred to as the positive contact terminal 160 to distinguish them.

At this time, the negative contact terminal 150 may be bent to one side at the protruding position and form the first wrinkle pattern 155. As shown in the drawing, the first wrinkle pattern 155 forms wrinkles on the negative electrode contact terminal 150 to form a larger contact area compared to the negative contact terminal 150 without the first wrinkle pattern 155. .

Meanwhile, the protruding contact terminal is preferably made of the same material as the connected electrode lead, but this is not necessarily limited and may be made of a different material from the connected electrode lead depending on the setting.

Figure 2 is a bottom perspective view of the electrical energy storage cell of Figure 1;

Referring to FIG. 2, another contact terminal may protrude outside the other surface of the packing material 140. Here, the protruding contact terminal may be a contact terminal having a different polarity from the protruding contact terminal in FIG. 1 .

Since the protruding contact terminal in FIG. 1 is referred to as the negative contact terminal 150, the protruding contact terminal in FIG. 2 may be the positive contact terminal 160. However, as described above, this is only a distinction to facilitate understanding and is not limiting. If the protruding contact terminal in FIG. 1 is the positive contact terminal 160, the protruding contact terminal in FIG. 2 is the negative contact terminal 150. ) can be.

The positive contact terminal 160 is different from the negative contact terminal 150 only in polarity and location, and may have the same shape as the negative contact terminal 150. That is, the positive contact terminal 160 may form a second wrinkle pattern 165 of the same shape as the first wrinkle pattern 155, and may be formed of the same material or a different material as the positive electrode lead 130. .

The position of the positive contact terminal 160 may protrude from the other surface of the packing material 140 on which the negative contact terminal 150 protrudes, and the positive contact terminal 150 may protrude from the other surface in a direction different from the bending direction of the negative contact terminal 150. It is located on the side and can have a bending direction toward the other side.

That is, when the negative contact terminal 150 of FIG. 1 protrudes from the left side of one side of the packing material 140 and is bent toward the left side, the positive contact terminal 160 protrudes from the right side of the other side and is bent toward the right side. It will happen.

As described above, the contact terminals 150 and 160 protrude in opposite directions to form a balance without deviation when forming an arrangement between the electric energy storage cells 100, which will be described later with reference to FIGS. 3 and 4. Let's look at it in more detail later.

FIG. 3 is a side cross-sectional view of the electric energy storage cell of FIG. 1, and FIG. 4 is an example of utilization of the electric energy storage cell of FIG. 1.

3 and 4, the internal electrode lead-type electrical energy storage cell 100 having a protruding contact terminal according to an embodiment of the present invention includes an electrode sheet 110, a negative electrode lead 120, and a positive electrode. It may be configured to include an electrode lead 130, a packing material 140, a negative contact terminal 150, and a positive contact terminal 160.

Here, the electrode sheet 110 may be formed by providing one or more of the above-described electrode bodies (not shown), and the shape of the electrode sheet 110 may also be different depending on the shape of the electric energy storage cell 100. For example, in the case of a pouch-shaped electric energy storage cell 100 as shown in FIG. 3, since it must be contained in a pouch-shaped packing material 140, the electrode sheet 110 may be folded in several stages. . On the other hand, although not shown in the drawing, in the case of a cylindrical electric energy storage cell 100, the electrode sheet 110 may have a rolled shape.

The cathode electrode lead 120 and the anode electrode lead 130 may be provided on one side and the other side of the electrode sheet 110, respectively, and the cathode electrode lead 120 includes the cathode material constituting the electrode sheet 110 and the anode. The electrode lead 130 may be connected to the anode material constituting the electrode sheet 110.

At this time, the negative electrode lead 120 and the positive electrode lead 130 may be connected to the negative electrode material and the positive electrode material, respectively, with an electric wire or the like, but may also be connected directly.

In addition, the negative electrode lead 120 and the positive electrode lead 130 may be attached to or combined with the electrode sheet 110 and fixed to the electrode sheet 110, but may be packed with a packing material 140 to be described later. It may simply be in a tightly fixed form.

The packing material 140 is a member that surrounds the electrode sheet 110, the negative electrode lead 120, and the positive electrode lead 130 to protect them from the outside, and forms the exterior of the electric energy storage cell 100, and is made of aluminum laminate. It can be formed, and its outer surface can be coated with a polymer material. However, it is not limited to this and may be formed of other materials, and the surface may not be coated.

The negative electrode contact terminal 150 may protrude through one surface of the packing material 140 along an extension line of the negative electrode lead 120. To this end, a first through hole 141 through which the negative contact terminal 150 passes may be provided on one side of the packing material 140.

Additionally, the positive contact terminal 160 may protrude through the other surface of the packing material 140 along an extension line of the positive electrode lead 130. To this end, a second through hole 142 through which the positive contact terminal 160 passes may be provided on the other surface of the packing material 140.

Here, the cathode contact terminal 150 and the anode contact terminal 160 may be bent toward the side of the adjacent electric energy storage cell 100 at their respective protruding positions, and the cathode contact terminal 150 may have a first contact terminal at the bent portion. A wrinkle pattern 155 may be formed, and the positive contact terminal 160 may form a second wrinkle pattern 165 that matches the first wrinkle pattern 155 at the bent portion.

Through each of the contact terminals 150 and 160 forming these wrinkle patterns 155 and 165, the present invention connects the negative contact terminal 150 or the positive contact terminal of one electrical energy storage cell 100a as shown in FIG. 4. The electrical energy storage cell 100 may be arranged so that one of the electrical energy storage cells 100b fits the negative contact terminal 150 or the positive contact terminal 160 having the opposite polarity of the other electrical energy storage cell 100b.

That is, the negative contact terminal 150 of one electrical energy storage cell 100a can be aligned to fit the positive contact terminal 160 of another electrical energy storage cell 100b. Here, the wrinkle patterns 155 and 165 of each contact terminal 150 and 160 can prevent the contact terminals 150 and 160 from fitting together, and further increase the charging and discharging efficiency by increasing the contact area. , which can ultimately lower the pressure applied during charging and discharging. Additionally, shock between the electric energy storage cells 100 can be alleviated.

At this time, since each contact terminal 150 and 160 is located on opposite sides, when a plurality of electric energy storage cells 100 are formed, they can be arranged without a step between the left and right sides to prevent tilting to one side. .

Meanwhile, the negative electrode lead 120 and the positive electrode lead 130 may be interposed between the electrode sheet 110 and the packing material 140 in a folded state in at least one stage. This allows each electrode lead (120, 130) to form elastic force while expanding the area to allow current to be transmitted smoothly, and prevents each contact terminal (150, 160) from easily falling into the packing material (140). there is.

In addition, the negative electrode lead 120 and the positive electrode lead 130 may form a bent piece 170 that is bent in contact with one side of the electrode sheet 110 at the inner end located inside the electrode sheet 110. . The bent piece 170 can align the negative electrode lead 120 and the positive electrode lead 130 with respect to the electrode sheet 110 so that the positions of the negative electrode lead 120 and the positive electrode lead 130 are uniform. , Ultimately, the effect of each contact terminal 150 and 160 can be maximized by making the positions of each contact terminal 150 and 160 connected to each electrode lead 120 and 130 uniform.

Figure 5 is a perspective view of an internal electrode lead-type electric energy storage cell having a protruding contact terminal according to another embodiment of the present invention, Figure 6 is a bottom perspective view of the electric energy storage cell of Figure 5, and Figure 7 is a perspective view of the electric energy storage cell of Figure 5. This is an example of the use of an electric energy storage cell, and FIGS. 8 (a) and (b) are diagrams showing examples of various forms of the protruding contact terminal of FIG. 5.

5 to 8, an internal electrode lead-type electrical energy storage cell 200 having a protruding contact terminal according to another embodiment of the present invention includes an electrode sheet (not shown), a negative electrode lead (not shown), It may be configured to include a positive electrode lead (not shown), a packing material 240, a negative electrode contact terminal 250, and a positive contact terminal 260.

Here, the electrode sheet, the cathode electrode lead, the anode electrode lead, and the packing material 240 are an internal electrode lead-type electric energy storage cell ( It may be substantially the same as the electrode sheet 110, negative electrode lead 120, positive electrode lead 130, and packing material 140 of 100.

Therefore, detailed description of the electrode sheet, negative electrode lead, positive electrode lead, and packing material 240 will be omitted.

In addition, the negative contact terminal 250 and the positive contact terminal 260 have a first corner 255 and a second wrinkle pattern 165 instead of the first wrinkle pattern 155 and the second wrinkle pattern 165 at each contact terminal 150 and 160. The negative contact terminal of the internal electrode lead-type electrical energy storage cell 100 having a protruding contact terminal according to an embodiment of the present invention described with reference to FIGS. 1 to 4, except for forming the corner portion 265. It may be substantially the same as 150 and the positive contact terminal 160.

Therefore, hereinafter, only the first corner 255 and the second corner 265 of the negative contact terminal 250 and the positive contact terminal 260 will be described.

The negative contact terminal 250 may form a first angle portion 255 composed of a positive or negative pattern or a combination of positive and negative patterns, and the positive contact terminal 260 may have a first angle portion 255 to which the positive contact terminal 250 fits. The second angle portion 265 may be formed of a positive or negative pattern, or a combination of positive and negative patterns.

That is, when an embossed pattern is formed on the negative contact terminal 250, a corresponding engraved pattern can be formed on the positive contact terminal 260, and when an engraved pattern is formed on the negative contact terminal 250, the positive contact terminal ( An embossed pattern of a corresponding shape may be formed on 260, so that the contact area can be expanded when contacting each contact terminal 250, 260, and the arrangement can be achieved without being pushed.

At this time, the embossed pattern and the engraved pattern may be formed as a zigzag pattern in which the 'ㄷ' shape alternates between the left and right sides to form a length, as shown in (a) of FIG. 8, and (b) of FIG. 8. As shown, it may be formed in a '+' shaped pattern. Here, in the case of a '+' shaped pattern, balanced load distribution may be possible.

In addition, the internal electrode lead-type electrical energy storage cells 100 and 200 having protruding contact terminals according to the above-described embodiments have a first wing tape 310 and a second wing tape 320 formed on the upper and lower sides, respectively. The double wing tape 300 is attached between the negative contact terminals 150, 250 and the positive contact terminals 160, 260 and the packing material 140, 240 to connect the negative contact terminals 150, 250 or the positive contact terminals 160. , 260) may be fixed to the packing materials 140 and 240 and may be configured to seal the gap between them. This will be explained with reference to FIGS. 9 to 11.

FIG. 9 is a diagram illustrating a state in which a double-wing tape is attached to an internal electrode lead-type electric energy storage cell having a protruding contact terminal according to an embodiment of the present invention, and FIGS. 10 (a) and (b) are FIG. This is a drawing illustrating the process of attaching the double-winged tape of Figure 9, and Figure 11 is an enlarged view showing the attached state of the double-winged tape of Figure 9.

9 to 11, the double wing tape 300 forms wrinkle patterns 155, 165 or angle parts 255, 265 on the negative contact terminals 150 and 250 and the positive contact terminals 160 and 260. Before doing so, the center can be inserted so that the negative contact terminals 150, 250 or the positive contact terminals 160, 260 pass through.

Thereafter, the first wing tape 310 is attached to the packing material 140, 240, and the second wing tape 320 can be attached to the negative contact terminals 150, 250 or the positive contact terminals 160, 260. there is. At this time, the first wing tape 310 attached to the packing material (140, 240) is larger than the area of the first through holes (141, 241) and the second through holes (142, 242) provided in the packing material (140). It can be attached to form a large area.

Through this, the negative contact terminals 150, 250 and the positive contact terminals 160, 260 can be fixed to the packing materials 140, 240, and the first through holes 141, 241 and the second through holes 142 , 242) and the packing materials 140 and 240 are sealed to prevent electrolyte from leaking.

Although embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical idea or essential features of the present invention. You will be able to understand it. Therefore, the embodiments described above are illustrative in all respects and are not restrictive.

100: electrical energy storage cell
110: electrode sheet
120: cathode electrode lead
130: positive electrode lead
140: Packing material
141: first through hole
142: second through hole
150: negative contact terminal
155: first wrinkle pattern
160: positive contact terminal
165: second wrinkle pattern
170: bending piece
200: electrical energy storage cell
240: Packing material
241: first through hole
242: second through hole
250: negative contact terminal
255: Part 1
260: positive contact terminal
265: Part 2
300: double wing tape
310: first wing tape
320: 2nd wing tape

Claims (7)

An electrode sheet provided with one or more electrode bodies constituting a separator between the negative electrode material and the positive electrode material;
A negative electrode lead provided on one side of the electrode sheet and connected to the negative electrode material;
A positive electrode lead provided on the other side of the electrode sheet and connected to the positive electrode material;
A packing material that surrounds and packs the electrode sheet, negative electrode lead, and positive electrode lead;
A negative electrode contact terminal protrudes through the packing material on an extension line of the negative electrode lead and forms a first wrinkle pattern, and
Internal electrode lead type electrical energy having a protruding contact terminal that protrudes through the packing material on an extension line of the positive electrode lead and includes a positive contact terminal that forms a second wrinkle pattern that matches the first wrinkle pattern. storage cell.
An electrode sheet provided with one or more electrode bodies constituting a separator between the negative electrode material and the positive electrode material;
A negative electrode lead provided on one side of the electrode sheet and connected to the negative electrode material;
A positive electrode lead provided on the other side of the electrode sheet and connected to the positive electrode material;
A packing material that surrounds and packs the electrode sheet, negative electrode lead, and positive electrode lead;
A negative contact terminal that protrudes through the packing material on an extension line of the negative electrode lead and forms a first angle portion composed of a positive or negative pattern or a combination of positive and negative patterns, and
A positive contact terminal that protrudes through the packing material on an extension line of the positive electrode lead and forms a second corner of a positive or negative pattern or a combination of positive and negative patterns that fits into the first corner formed on the negative electrode contact terminal. An internal electrode lead-type electrical energy storage cell having a protruding contact terminal comprising a.
The method of claim 1 or 2,
The cathode electrode lead and the anode electrode lead are each,
An internal electrode lead-type electrical energy storage cell having a protruding contact terminal, characterized in that it is interposed in a folded state in at least one stage between the electrode sheet and the packing material.
The method of claim 1 or 2,
The cathode electrode lead and the anode electrode lead are each,
An internal electrode lead-type electric energy storage cell having a protruding contact terminal, characterized in that a bent piece is formed at an inner end located inside the electrode sheet so as to contact one side of the electrode sheet.
According to claim 2,
The embossed pattern or engraved pattern is,
An internal electrode lead-type electric energy storage cell having a protruding contact terminal, characterized in that it is a zigzag pattern in which the 'ㄷ' shape alternates between left and right to form a length, or a '+' shape pattern.
The method of claim 1 or 2,
The negative contact terminal or the positive contact terminal is inserted into the center of the double wing tape where the first wing tape and the second wing tape are formed on the upper and lower sides, respectively,
The first wing tape is attached to a packing material, and the second wing tape is formed to be attached to a negative contact terminal or a positive contact terminal.
According to claim 6,
The first wing tape is,
An internal electrode lead-type electric energy storage cell having a protruding contact terminal, wherein the negative contact terminal and the positive contact terminal form an area larger than the area of a through hole provided in the packing material in order to protrude outside the packing material.