KR102053043B1 - Lithium battery with improved output property and vibration proof - Google Patents

Abstract

Disclosed is a cylindrical lithium battery with improved output characteristics and vibration resistance which facilitates insulation by applying multiple tap terminals for output improvement and improves vibration resistance by an insulation support performing a role of a support in a space between a header assembly and a winding element. According to the present invention, the lithium battery with improved output characteristics and vibration resistance comprises: a case to accommodate an electrolyte therein; a header assembly to cover an upper side of the case; an upper insulation plate arranged between the header assembly and a winding element; a winding element inserted and arranged in the case, wherein an anode having a plurality of anode tap terminals and a cathode having a separation membrane and a plurality of cathode tap terminals are sequentially stacked to be wound thereon; and an insulation support filling a space between the winding element and the upper insulation plate. The plurality of anode tap terminals protrude above the insulation support to be grounded on the header assembly. The plurality of cathode tap terminals are arranged below the insulation support to be grounded on the case.

Description

Lithium battery with improved output characteristics and seismic resistance {LITHIUM BATTERY WITH IMPROVED OUTPUT PROPERTY AND VIBRATION PROOF}

The present invention relates to a lithium battery with improved output characteristics and seismic resistance, and more particularly, to an insulation support that is easily insulated by applying a multi-tap terminal for improving an output, and serves as a support in a space between a header assembly and a winding device. The present invention relates to a lithium battery having improved output characteristics and seismic resistance, which can improve vibration resistance.

In general, the lithium battery that can be charged and discharged is attracting attention as an auxiliary power source for communication that requires a small high-output battery in addition to the main energy source of the market that requires a high capacity, such as mobile devices, power tools and vehicles.

Such lithium batteries have a high amount of lithium in the battery due to efforts to increase their capacity within a unit volume, and their capacity is generally used at about 2,400 to 3,000 mAh.

In addition, such a lithium battery is wound by stacking a separator by connecting a tab terminal to a positive electrode and a negative electrode. At this time, the positive electrode tab terminal is bonded to the header pin, the negative electrode tab terminal to the case. Subsequently, after the electrolyte is injected into the cylindrical case, a clamping type cylindrical lithium battery is completed by combining the upper part of the case and the header pin.

Cylindrical lithium batteries of this clamping type have limited leakage and generation of internal pressure due to deterioration of the gasket.

On the other hand, in order to compensate for these disadvantages according to the use environment, a cylindrical battery structure in which the header assembly and the case are assembled by a method such as TIG welding or laser welding having a completely sealed structure is used.

In this case, the header assembly coupled to the top of the case is composed of a header body, a header pin, and an electrolyte inlet for injecting electrolyte, and the glass body and the metal sealing technology are bonded and insulated between the header body and the header pin. I'm making it.

In the technique using the header assembly, the positive electrode tab terminal is bonded to the header pin, and the negative electrode tab terminal is bonded to the case, and all of them are bonded at the top of the battery.

At this time, it is difficult to use the multi-tap terminal because of the insulation between the tap terminals, there was a difficulty in improving the output.

Cylindrical lithium batteries require a void volume for capturing gas generated during use, thereby creating a space between the case and the winding element and the header assembly therein. This space makes the battery very vulnerable to vibration.

Accordingly, the lithium battery according to the related art has a problem in that output distance is increased due to an increase in distance from an electrode end to a tab terminal, and there is a problem in that a welding part of the positive electrode tab terminal is broken at high vibration because there is no support.

An object of the present invention is easy to insulate by the application of a multi-tab terminal for improving the output, and improved output characteristics and shock resistance can be improved by the insulating support which serves as a support in the space between the header assembly and the winding element It is to provide a lithium battery.

According to an embodiment of the present invention for achieving the above object, a lithium battery having improved output characteristics and shock resistance has a case accommodating an electrolyte therein; A header assembly covering an upper side of the case; An upper insulating plate disposed between the header assembly and the winding element; A winding element inserted into the case and stacked and wound with a cathode having a plurality of positive electrode tab terminals and a cathode having a separator and a plurality of negative electrode tab terminals sequentially stacked; And an insulating support filling a space between the winding element and the upper insulating plate, wherein the plurality of positive electrode tab terminals protrude upwardly of the insulating support to be grounded to the header assembly, and the plurality of negative electrode tab terminals are formed of the insulating support. It is disposed to the lower side is characterized in that grounded to the case.

The lithium battery having improved output characteristics and vibration resistance according to the present invention can stably insulate between multiple tab terminals by introducing an insulating support having a plurality of positive electrode tab terminal supports, a plurality of positive electrode tab terminal insertion holes, and a plurality of negative electrode tab terminal insertion holes. have.

In addition, the lithium battery having improved output characteristics and seismic resistance according to an embodiment of the present invention can shorten the distance between the electrode and the tab terminal by utilizing a plurality of positive electrode and negative electrode tab terminals. The application increases the contact area between the plurality of positive electrode tab terminals and the header pin which is an external terminal, thereby improving output characteristics.

In addition, the lithium battery having improved output characteristics and seismic resistance according to the present invention has a structural advantage of improving the seismic resistance by inserting an insulating support which serves as a support in the space between the header assembly and the winding element.

1 is an exploded perspective view showing a lithium battery with improved output characteristics and seismic resistance according to an embodiment of the present invention.
2 is an enlarged perspective view illustrating the header assembly of FIG. 1 in an enlarged manner.
3 is an exploded view showing an enlarged anode of the winding device of FIG.
4 is an enlarged perspective view of the insulating support of FIG. 1.
FIG. 5 is an enlarged plan view of the insulating support of FIG. 1; FIG.
6 is an expanded view showing an electrode of a winding device according to Comparative Example 1 in an enlarged manner.
Figure 7 is a graph showing the results of 2A continuous discharge at room temperature of the lithium battery prepared according to Example 1 and Comparative Example 1.
8 is a graph showing the results of 2 A continuous discharge at −30 ° C. of lithium batteries prepared according to Example 1 and Comparative Example 1. FIG.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms, and only the present embodiments make the disclosure of the present invention complete, and the general knowledge in the technical field to which the present invention belongs. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, a lithium battery having improved output characteristics and seismic resistance according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view illustrating a lithium battery having improved output characteristics and seismic resistance according to an exemplary embodiment of the present invention.

Referring to FIG. 1, the lithium battery 100 having improved output characteristics and seismic resistance according to an embodiment of the present invention may include a case 110, a header assembly 120, an upper insulation plate 130, a winding element 140, and an insulating support. And 150.

The case 110 has a cylindrical shape and accommodates the electrolyte therein. The case 110 may be a metal material having excellent corrosion resistance and durability as a part of the body of the lithium battery 100. The lower insulating plate 160 may be inserted into an inner bottom surface of the case 110. The lower insulating plate 160 serves to prevent a short circuit of the electrode in the case 110.

The electrolyte solution impregnated inside the case 110 includes a solute expressing a capacity of the winding device 140 and a solvent for dissolving the solute.

As the solute of the electrolyte, an electrolyte salt containing lithium such as LiPF ₆ , LiBF _4, and LiTFSi may be used, but is not limited thereto.

In addition, the solvent of the electrolyte solution is a cyclic carbonate solvent such as ethylene carbonate (Ethylene Carbonate), propylene carbonate (Propylene Carbonate), butylene carbonate (Butylene Carbonate), dimethyl carbonate (Dimethyl Carbonate), diethyl carbonate (Diethyl Carbonate), ethyl methyl carbonate ( A mixture of a linear carbonate solvent such as EthylMethylCarbonate, a solvent such as methyl acetate, methyl acetate, ethyl acetate, methyl propionate, and ethyl propionate may be used. It is not limited to this.

The header assembly 120 covers the upper side of the case 110. The header assembly 120 may be coupled to the case 110 by laser welding or the like.

FIG. 2 is an enlarged perspective view illustrating an enlarged header assembly of FIG. 1 and will be described with reference to FIG. 1.

As shown in FIGS. 1 and 2, the header assembly 120 includes a header body 122, a header pin 124, a sealing member 126, an electrolyte inlet T, and a metal ball 128.

The header body 122 covers the upper portion of the case 110. The header body 122 preferably has a cylindrical shape similar to the case 110.

The header pin 124 is disposed to penetrate through the central portion of the header body 122, a part of which protrudes outward. The header body 122 and the upper insulating plate 130 may be stably coupled by the header pin 124.

The sealing member 126 is mounted to seal the header pin 124 portion of the header body 122. This sealing member 126 serves to seal between the header body 122 and the header pin 124. To this end, the sealing member 126 isobutylene isoprene rubber (isobutylene-isoprene rubber), UV curable resin, PTFE (Polytetrafluoroethylene), epoxy resin (polyoxyde), polyimide resin (polyvinide alcohol), PVA (polyvinyl alcohol) At least one selected from PVB (polyvinyl butyral) may be used, but is not limited thereto.

The electrolyte injection hole T is installed at one edge portion of the header body 122.

The metal ball 128 is welded to the electrolyte injection hole T, and is mounted to prevent leakage of the electrolyte. In this case, a stainless steel material may be used as the metal ball 128, but is not limited thereto.

Here, after the vacuum injection of the electrolyte solution into the case 110 into which the winding device 140 is inserted through the electrolyte injection hole T, the metal ball 128 is sealed by a method such as resistance welding. 100 can achieve a stable sealing effect.

The upper insulating plate 130 is disposed between the header assembly 120 and the winding element 140. The upper insulating plate 130 prevents the electrolyte inside the case 110 from leaking. In this case, the upper insulating plate 130 may be provided with a through hole H through which the plurality of positive electrode tab terminals 142c pass.

The winding device 140 is inserted into the case 110, and the positive electrode having the plurality of positive electrode tab terminals 142c and the negative electrode having the separator and the plurality of negative electrode tab terminals 144c are sequentially stacked and wound up.

The positive electrode has a positive electrode current collector, a positive electrode active material formed on at least one surface of the positive electrode current collector, and a plurality of positive electrode tab terminals 142c which are grounded to the positive electrode current collector and spaced apart at regular intervals on the positive electrode current collector.

Similarly, the negative electrode has a negative electrode current collector, a negative electrode active material formed on at least one surface of the negative electrode current collector, and a plurality of negative electrode tab terminals 144c which are grounded to the negative electrode current collector and spaced apart at regular intervals on the negative electrode current collector.

The separator prevents the positive electrode and the negative electrode from physically contacting each other. In addition, the separator is preferably porous and maintains an electrolyte solution in the pores so that a conductive path between the anode and the cathode is formed. The material of the separator is not particularly limited, and for example, may be selected from porous cellulose, polypropylene, polyethylene, fluorine resin, and the like.

As such, since the anode and the cathode have substantially the same configuration, hereinafter, the anode will be described as an example.

FIG. 3 is an enlarged development view illustrating the anode of the winding device of FIG. 1, which will be described in connection with FIG. 1.

As shown in FIGS. 1 and 3, the positive electrode 142 is grounded on the positive electrode current collector 142a, the positive electrode active material 142b formed on at least one surface of the positive electrode current collector 142a, and the positive electrode current collector 142a. And a plurality of positive electrode tab terminals 142c spaced apart at regular intervals on the positive electrode current collector 142a.

Metal foil may be used as the positive electrode current collector 142a. In this case, the metal foil used for the positive electrode current collector 142a may be made of a metal that exhibits conductivity, but is not necessarily limited thereto. Preferably, aluminum or copper may be used as an example. Dimensions, such as the magnitude | size and thickness of metal foil, are not specifically limited.

For example, the plurality of positive electrode tab terminals 142c may be configured as three. As described above, in the present invention, by configuring the three positive electrode tab terminals 142c, the distance from the positive electrode current collector 142a corresponding to the activated electrode portion to the three positive electrode tab terminals 142c is shortened and thus the output characteristics are reduced. It can be greatly improved.

As illustrated in FIG. 1, a plurality of positive electrode tab terminals 142c and a plurality of negative electrode tab terminals 144c may be respectively configured.

In this case, it is preferable that the plurality of positive electrode tab terminals 142c and the plurality of negative electrode tab terminals 144c are spaced apart at intervals of 60 ° in the order of anode-cathode-anode-cathode-anode-cathode. In addition, the plurality of positive electrode tab terminals 142c and the plurality of negative electrode tab terminals 144c do not overlap each other so that the plurality of positive electrode tab terminals 142c and the plurality of negative electrode tab terminals 144c do not overlap each other. It is more preferable to arrange in a zigzag form.

The insulating support 150 fills the space between the winding element 140 and the upper insulating plate 130. The insulating support 150 is a portion that absorbs the insulation and vibration of the electrode in order to be inserted into the interior of the cylindrical case 110, it is preferable to have a cylindrical structure.

As the insulating support 150, it is preferable to use a polymer material having excellent rigidity and insulation. To this end, the insulating support 150 may be formed of at least one material selected from polyethylene (PE), polypropylene (PP), Teflon, Fluorinated Ethylene Propylene (FEP), and nylon 66.

4 is an enlarged perspective view of the insulating support of FIG. 1, and FIG. 5 is an enlarged plan view of the insulating support of FIG. 1, and will be described with reference to FIG. 1.

1, 4, and 5, the insulating support 150 includes a support body 152, a plurality of positive electrode tab terminal supports 154, a plurality of positive electrode tab terminal insertion holes 156, and a plurality of negative electrode tabs. And a terminal insertion hole 158.

The support body 152 has an annular structure. The support body 152 preferably has a thickness thicker than the thickness of the upper insulating plate 130 in order to stably absorb the insulation and vibration of the electrode.

In particular, the outer diameter of the support body 152 is preferably formed to be at least 0.2mm or less than the inner diameter of the case 110.

The support body 152 having an annular structure is preferably designed to be larger than the diameter of the upper insulating plate 130 and the winding element 140. As such, the support body 152 should be designed to be larger than the diameter of the upper insulation plate 130 and the winding element 140 so as to surround the edge portions of the upper insulation plate 130 and the winding element 140. It is possible to stably prevent the movement of the winding element 140 from vibration.

The plurality of positive electrode tab terminal supports 154 extend from the support body 152 to the inner center and are interconnected. For example, the plurality of positive electrode tab terminal supporters 154 may be formed in three, and in this case, the three positive electrode tab terminal supports 154 may be installed at intervals of 120 °. Each of the plurality of positive electrode tab terminal supports 154 has a width of 0.5 mm or more, and preferably is formed so as not to interfere with the plurality of positive electrode tab terminal insertion holes 156.

The plurality of positive electrode tab terminal insertion holes 156 are installed to penetrate a portion of the plurality of positive electrode tab terminal supports 154, respectively. Accordingly, the plurality of positive electrode tab terminals 142c are inserted and passed through the plurality of positive electrode tab terminal insertion holes 156.

The plurality of negative electrode tab terminal insertion holes 158 are installed to penetrate a part of the side surface of the support body 152, respectively. Accordingly, the plurality of negative electrode tab terminal 144c is inserted and passed through the plurality of negative electrode tab terminal insertion holes 158.

In this case, the plurality of positive electrode tab terminals 142c and the plurality of negative electrode tab terminals 144c are inserted into and fixed to the plurality of positive electrode tab terminal insertion holes 156 and the plurality of negative electrode tab terminal insertion holes 158, respectively. As a result, while the insulation function can be provided by the plurality of positive electrode tab terminal supports 154, the left and right movements of the plurality of positive electrode tab terminals 142c and the plurality of negative electrode tab terminals 144c can be prevented.

Here, the plurality of positive electrode tab terminals 142c protrude upward from the insulating support 150 to be electrically grounded to the header assembly 120. The plurality of negative electrode tab terminals 144c are disposed below the insulating support 150 and electrically grounded to the case 110.

That is, the plurality of positive electrode tab terminals 142c are inserted into the plurality of positive electrode tab terminal insertion holes 156 in a form of being stably fixed by the plurality of positive electrode tab terminal supports 154, and then the through holes of the upper insulating plate 130. Passed through (H) is electrically grounded to the header pin 124 of the header assembly 120.

In addition, the plurality of negative electrode tab terminals 144c are inserted into the plurality of negative electrode tab terminal insertion holes 158 which respectively penetrate a part of the side surface of the support body 152, and then bent to the lower side of the insulating support 150. Is electrically grounded to 110. Accordingly, the plurality of negative electrode tab terminals 144c may be stably fixed by the support body 152.

As a result, the lithium battery 100 having improved output characteristics and seismic resistance according to an embodiment of the present invention is easily insulated by applying a multi-tap terminal for improving the output, and a space between the header assembly 120 and the winding element 140. In order to improve the seismic resistance by the insulating support 150 to serve as a support.

The lithium battery having improved output characteristics and vibration resistance according to the exemplary embodiment of the present invention described above is provided with an insulating support having a plurality of positive electrode tab terminal supports, a plurality of positive electrode tab terminal insertion holes, and a plurality of negative electrode tab terminal insertion holes. It can be insulated stably.

In addition, the lithium battery having improved output characteristics and seismic resistance according to an embodiment of the present invention may shorten the distance between the electrode and the tab terminal by utilizing a plurality of positive and negative electrode tab terminals. The application of the tab terminal increases the contact area between the plurality of positive electrode tab terminals and the header pin which is an external terminal, thereby improving output characteristics.

In addition, the lithium battery having improved output characteristics and vibration resistance according to an embodiment of the present invention has a structural advantage of improving the vibration resistance by inserting an insulating support which serves as a support in the space between the header assembly and the winding device. Has

Example

Hereinafter, the configuration and operation of the present invention through the preferred embodiment of the present invention will be described in more detail. However, this is presented as a preferred example of the present invention and in no sense can be construed as limiting the present invention.

Details that are not described herein will be omitted since those skilled in the art can sufficiently infer technically.

1. Lithium Battery Manufacturing

Example 1

A positive electrode and a negative electrode each having three tab terminals were bonded to each other, a separator was positioned between the positive electrode and the negative electrode, and wound in a jelly roll to fabricate a winding device. At this time, each of the positive electrode tab terminal and the negative electrode tab terminal was spaced at intervals of 60 ° angle and arranged in the order of anode-cathode-anode-anode-anode-cathode.

Next, the lower insulating plate was inserted into the case, and the positive electrode tab terminal was disposed upward through the positive electrode tab terminal insertion hole of the insulating support, and the negative electrode tab terminal was disposed downwardly through the negative electrode tab terminal insertion hole and inserted into the case.

Here, the insulating support is a support body having an annular structure, a plurality of positive electrode tab terminal supporters extending from the support body at an angle of 120 ° from the support body at an angle of 120 ° to penetrate a portion of the plurality of positive electrode tab terminal supports, respectively. And a plurality of positive electrode tab terminal insertion holes through which a plurality of positive electrode tab terminals are inserted, and a plurality of negative electrode tab terminal insertion holes through which a plurality of negative electrode tab terminals are inserted to penetrate a part of the side surface of the support body, respectively. It was.

Next, the upper insulation plate was placed in the header assembly, the positive electrode tab terminals were welded to the header pins, and the negative electrode tab terminals were welded to the inside of the case and grounded.

Next, after assembling the header assembly and the case by welding, the electrolyte was injected through the electrolyte injection hole of the header assembly, and then the electrolyte injection hole was welded with a metal ball to manufacture a sealed cylindrical lithium battery.

Comparative Example 1

6 is an expanded view showing an enlarged electrode of the winding device according to Comparative Example 1. FIG.

Referring to FIG. 6, a positive electrode 42 having a single positive electrode tab terminal 42c and a negative electrode having a single negative electrode tab terminal are bonded to each other, and a separator is positioned between the positive electrode 42 and the negative electrode to be wound in a jelly roll to wind up. The ruler was produced.

Next, a lower insulating plate was inserted into the case, and a winding element having a single positive electrode tab terminal 42c and a single negative electrode tab terminal was inserted into the case.

Next, the upper insulation plate was placed in the header assembly, the positive electrode tab terminal was welded to the header pin, and the negative electrode tab terminal was welded to the inside of the case and grounded.

Next, after assembling the header assembly and the case by welding, the electrolyte was injected through the electrolyte injection hole of the header assembly, and then the electrolyte injection hole was welded with a metal ball to manufacture a sealed cylindrical lithium battery.

2. Property evaluation

Table 1 and Table 2 show the results of evaluation of physical properties of the cylindrical lithium battery prepared according to Example 1 and Comparative Example 1. More specifically, Table 1 shows the results of 2A continuous discharge at room temperature, Table 2 shows the results of 2A continuous discharge at -30 ° C, and the electrode areas of Example 1 and Comparative Example 1 were produced by applying the same. Was used.

In addition, Figure 7 is a graph showing the results of 2A continuous discharge at room temperature of the cylindrical lithium battery prepared according to Example 1 and Comparative Example 1, Figure 8 is a cylindrical lithium battery prepared according to Example 1 and Comparative Example 1 A graph showing the results of 2A continuous discharge at -30 ° C.

At this time, in order to check the difference in the characteristics of the cylindrical lithium batteries prepared according to Example 1 and Comparative Example 1, by charging each lithium battery measured the capacity and resistance with a load of 2A at room temperature (22 ℃) and -30 ℃, respectively. It was.

TABLE 1

TABLE 2

As shown in Table 1, Table 2, Figures 7 and 8, the direct current resistance for Example 1 and Comparative Example 1 at a high current is about 10 times the difference at room temperature, about 1.25 times the difference at -30 ℃ It was confirmed to show.

Unlike Comparative Example 1 using an electrode composed of one tab terminal, in Example 1 using an electrode composed of three tab terminals, the direct current was shortened due to the shortening of the distance between the electrode and the terminal due to an increase in the number of tab terminals. It was confirmed that the resistance was significantly lowered.

As a result, in Example 1, three multi-tap terminals were completely separated by applying an insulating support, and thus the application was easy. As a result, the DC resistance was reduced by reducing the path between the electrode and the terminal, and the capacitance at high current was achieved. It has been proved that the efficiency is improved.

Although the above has been described with reference to the embodiments of the present invention, various changes and modifications can be made at the level of those skilled in the art. Such changes and modifications can be said to belong to the present invention without departing from the scope of the technical idea provided by the present invention. Therefore, the scope of the present invention will be determined by the claims described below.

100: cylindrical lithium battery 110: case
120: header assembly 122: header body
124: header pin 126: sealing member
128: metal ball 130: upper insulation plate
140: winding element 142c: positive electrode tab terminal
144C: negative electrode tab terminal 150: insulating support
152 support body 154 positive electrode tab terminal support
156: positive electrode tab terminal insertion hole 158: negative electrode tab terminal insertion hole
160: lower insulation plate

Claims (10)

A case accommodating the electrolyte therein;
A header assembly covering an upper side of the case;
An upper insulating plate disposed between the header assembly and the winding element;
A winding element inserted inside the case and having a positive electrode having a plurality of positive electrode tab terminals and a negative electrode having a separator and a plurality of negative electrode tab terminals sequentially stacked; And
And an insulating support filling a space between the winding device and the upper insulating plate.
The plurality of positive electrode tab terminals protrude upward of the insulating support and grounded to the header assembly, and the plurality of negative electrode tab terminals are disposed below the insulating support and grounded to the case.
Each of the positive electrode and the negative electrode is a current collector; An active material formed on at least one surface of the current collector; And a plurality of tab terminals grounded at the current collector and spaced apart at regular intervals on the current collector.
Each of the plurality of positive electrode tab terminals and the plurality of negative electrode tab terminals is composed of three, and spaced apart at intervals of 60 ° in the order of anode-cathode-anode-cathode-anode-cathode,
The plurality of positive electrode tab terminals and the plurality of negative electrode tab terminals are arranged in a zigzag form, characterized in that the output characteristics and improved shock resistance lithium battery.
The method of claim 1,
The header assembly
A header body covering an upper portion of the case;
A header pin disposed to penetrate a central portion of the header body, the header pin protruding outwardly;
A sealing member for sealing a header pin portion of the header body;
An electrolyte injection hole installed at one edge of the header body; And
A metal ball welded to the electrolyte injection hole to prevent leakage of the electrolyte solution;
Lithium battery with improved output characteristics and shock resistance, characterized in that it comprises a.
The method of claim 2,
The plurality of positive electrode tab terminals
Lithium battery with improved output characteristics and vibration resistance, characterized in that connected to the header pin of the header assembly.
delete delete The method of claim 1,
The insulating support is
Lithium battery with improved output characteristics and vibration resistance, characterized in that formed of at least one material selected from polyethylene (PE), polypropylene (PP), Teflon (Feflon), Fluorinated Ethylene Propylene (FEP) and nylon 66.
The method of claim 1,
The insulating support is
A support body having an annular structure;
A plurality of positive electrode tab terminal supports extending from the support body to an inner center and interconnected with each other;
A plurality of positive electrode tab terminal insertion holes installed to penetrate portions of the plurality of positive electrode tab terminal supports, respectively, into which the plurality of positive electrode tab terminals are inserted; And
A plurality of negative electrode tab terminal insertion holes installed to penetrate a portion of the side surface of the support body, respectively, into which a plurality of negative electrode tab terminals are inserted;
Lithium battery with improved output characteristics and shock resistance, characterized in that it comprises a.
The method of claim 7, wherein
The outer diameter of the support body is
Lithium battery with improved output characteristics and shock resistance, characterized in that formed at least 0.2mm or less than the inner diameter of the case.
The method of claim 7, wherein
The plurality of positive electrode tab terminals and the plurality of negative electrode tab terminals are
By being inserted into and fixed to the plurality of positive electrode tab terminal insertion holes and the plurality of negative electrode tab terminal insertion holes, respectively, the left and right movements of the plurality of positive electrode tab terminals and the plurality of negative electrode tab terminals are provided while providing an insulation function. Lithium battery with improved output characteristics and shock resistance.
The method of claim 7, wherein
The support body having the annular structure
Designed to be larger than the diameter of the upper insulating plate and the winding element, to prevent the movement of the winding element due to external shock and vibration, lithium battery improved output characteristics and shock resistance.

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