KR102268336B1 - Battery Cell of Improved Cooling Efficiency - Google Patents

Abstract

The present invention includes an electrode assembly having a positive electrode/separator/negative electrode structure, and a battery case made of a laminate sheet to which an outer periphery is heat-sealed while the electrode assembly is mounted in a receiving unit;
at least one electrode constituting the electrode assembly has an uncoated portion extending to an end of the outer periphery of the battery case in at least one direction among directions in which the electrode tab is not formed is formed on the current collector;
The extended uncoated part is heat-sealed together on the outer periphery of the battery case;
A battery cell, characterized in that the sealing part around the outer periphery of the battery case heat-sealed with the extended uncoated part interposed therebetween is coupled to a C-shaped molding clamp having a structure capable of removing heat transferred from the extended plain fabric by thermal conduction. provides

Description

Battery Cell of Improved Cooling Efficiency}

The present invention relates to a battery cell with improved cooling efficiency, and specifically, the uncoated portion of at least one electrode is extended to the end of the outer periphery of the battery case and heat-sealed, and the sealing portion of the outer periphery of the battery case is extended It relates to a battery cell that remarkably improves cooling efficiency by being coupled to a C-shaped molding clamp having a structure that can remove heat transferred from the uncoated area by heat conduction.

As technology development and demand for mobile devices increase, the demand for secondary batteries as an energy source is rapidly increasing. Among such secondary batteries, lithium secondary batteries exhibiting high energy density and operating potential, long cycle life, and low self-discharge rate. has been commercialized and widely used.

In addition, as interest in environmental issues grows, research on electric vehicles and hybrid electric vehicles that can replace vehicles using fossil fuels such as gasoline vehicles and diesel vehicles, which are one of the main causes of air pollution, is being conducted. . Although nickel-metal hydride secondary batteries are mainly used as power sources for such electric vehicles and hybrid electric vehicles, research using lithium secondary batteries with high energy density and discharge voltage is being actively conducted, and some are in the commercialization stage.

While one or two or three battery cells are used per device in small mobile devices, medium-to-large battery modules electrically connecting a plurality of battery cells are used in mid-to-large devices such as automobiles due to the need for high output and large capacity.

These battery cells are composed of secondary batteries capable of charging and discharging, and during the charging and discharging process, the battery temperature rises due to heat generated by the internal resistance of the battery. In particular, since the heat of exothermic reaction inside the battery is added during discharging, the degree of heat generation is greater, and the temperature rises accordingly. When the temperature of the battery rises, the lifespan characteristics of the battery deteriorate and problems such as gas generation due to side reactions occur, so cooling the battery acts as an important factor.

Moreover, since the laminate sheet of the pouch-type battery, which is widely used recently, is coated with a polymer material with low thermal conductivity, it is difficult to effectively cool the temperature of the entire battery cell.

In particular, as in the case of an electric vehicle, when a large current is used to generate a high output, the heat of the battery is greater, and if the heat of the battery module generated during the charging and discharging process is not effectively removed, heat accumulation occurs, as a result, the battery It accelerates the deterioration of the module, and in some cases may cause fire or explosion. Accordingly, the battery pack, which is a high-output, large-capacity battery, requires a cooling system for cooling the battery cells contained therein.

In addition, in order to increase the capacity of the battery and lower the price in recent years, the capacity of the individual battery is increasing, and accordingly, the problem of heat generation of the battery is also serious.

In addition, when an internal short circuit occurs due to penetration of the needle-shaped conductor, etc., the temperature rise cannot be uniformly suppressed, and the strength of the battery against external impact is also low, so there is a limit in terms of securing the safety of the battery.

In order to solve the above problems, an inefficient direct air cooling method, an indirect air cooling method using a heat sink that improves efficiency but is expensive, and a water cooling method in which a water channel is made in the heat sink and cooled by flowing cooling water has been used.

However, in the method that relies on external cooling of the battery cell, when the thickness of the battery is increased, the temperature of the entire battery cell is lowered because the temperature increased from the center of the battery cell is not easily transferred to the heat sink outside the battery cell. It cannot be cooled uniformly.

Accordingly, a heat transfer method by conduction has been developed in the form of coupling a cooling tab to the electrode current collector and taking it out of the battery, but this also does not achieve sufficient cooling to a desired degree, and compared to the heat emitted from the battery cells. There was a problem that the cooling rate was significantly lowered.

Therefore, there is a high need for a battery cell with improved safety by enabling more efficient cooling during internal short circuits caused by heat generated during charging and discharging, external shocks, penetration of needle-shaped conductors, and the like.

An object of the present invention is to solve the problems of the prior art as described above and the technical problems that have been requested from the past.

After repeating various experiments and in-depth research, the inventors of the present application extend the uncoated part of at least one electrode constituting the electrode assembly to the end of the outer periphery of the battery case and fusion them together, and heat the uncoated part with the extended uncoated part interposed therebetween. When the sealing part on the periphery of the fused battery case is coupled to the C-shaped molding clamp having a structure that can remove the heat transferred from the extended uncoated part by heat conduction, heat generated during charging and discharging, external shock, and needle-shaped conductor In case of an internal short circuit due to penetration, etc., heat generated inside the electrode assembly can be effectively discharged to the outside, and the cooling rate can be improved, and the sealing part around the outer periphery of the battery case is fixed once again by the C-shaped molding clamp, It was confirmed that it was easier to secure battery safety, and the present invention was reached.

A battery cell according to the present invention for achieving this object is a battery case made of an electrode assembly having a positive electrode/separator/negative electrode structure, and a laminate sheet to which the outer periphery is heat-sealed while the electrode assembly is mounted in a receiving part. including;

the at least one electrode constituting the electrode assembly has an uncoated portion extending to an end of the outer periphery of the battery case in at least one direction among directions in which the electrode tab is not formed is formed on the current collector;

The extended uncoated portion is heat-sealed together on the outer periphery of the battery case;

The sealing portion around the outer periphery of the battery case heat-sealed with the extended uncoated portion interposed therebetween is coupled to a C-shaped molding clamp having a structure capable of removing heat transferred from the extended uncoated portion by thermal conduction.

In this case, an insulating tape for securing insulation may be attached to one or both surfaces of the extended uncoated portion meeting the heat-sealed portion of the battery case.

As described above, direct heat conduction from the inside of the battery to the outside is possible only by coupling the cooling tab to the electrode current collector and exposing it to the outside of the battery, but there is a limit to thermal cooling from the outside, Even if the heat dissipation member is exposed, the exposed portion is very small, and the cooling rate from the outside is very slow, so that a sufficient cooling effect cannot be obtained.

On the other hand, the battery cell of the present invention extends the uncoated part of the electrode current collector to the end of the battery cell and couples it to a C-shaped molding clamp having a cooling effect, thereby providing a means for improving the cooling rate from the outside, In the event of heat generation due to charging and discharging and internal short circuit due to penetration of the needle-shaped conductor, the cooling rate is increased to prevent ignition, and furthermore, the sealing part is compressed by the C-shaped molding clamp, and the battery case can be deteriorated due to the interposition of the uncoated part Battery safety can be further improved by increasing the sealing strength of

In addition, in order to obtain a more improved cooling effect by combining the extended uncoated region with the C-shaped molding clamp, the extended uncoated region is heated together on the outer periphery of the battery case with one end of the extended uncoated region exposed to the outside. It may be fused, and the C-shaped molding clamp has a structure in which a heat dissipation bar capable of heat conduction or a heat dissipation tube capable of water cooling or air cooling is inserted therein, and a slit for insertion of the sealing part is formed on one surface. of the C-type molding clamp, the uncoated portion extending with the sealing portion inserted into the slit of the C-type molding clamp may be in thermal contact with the heat dissipation bar or heat dissipation tube inside the C-type molding clamp.

That is, one end of the extended uncoated part directly contacts the heat dissipation bar or heat dissipation tube of the C-shaped molding clamp, and the heat dissipation bar can be additionally cooled by heat conduction and the heat dissipation tube by air cooling or water cooling. It can dissipate heat faster.

More specifically, since the cooling rate is significantly improved by contact with air or water by air cooling or water cooling rather than by heat conduction entirely, a heat dissipation tube may be formed inside the C-shaped molding clamp.

Meanwhile, with respect to the formation position of the extended uncoated area, two or more electrodes among the electrodes constituting the electrode assembly include the extended uncoated area in the current collector; Among the extended uncoated areas, uncoated areas of the same polarity may extend in the same direction, and uncoated areas of different polarities may extend in opposite directions.

Since the extended uncoated portion is interposed in the sealing portion of the battery case, uncoated portions extending from electrodes of different polarities may be interposed in the same direction, but in this case, the width of the extended uncoated portion, that is, the electrode length to prevent a short circuit. The width in each direction must be reduced to 50% or less, and in this case, cooling efficiency may be reduced, so it is preferable that uncoated regions extending from electrodes of different polarities extend in opposite directions.

In addition, the extended uncoated portion may be formed on only one side when the polarity is the same, but is preferably formed on both sides of the battery case in order to increase the cooling effect, regardless of whether the polarity is the same or different. In the present invention, one or more electrodes positioned in the middle of the electrode assembly among the electrodes constituting the electrode assembly include uncoated parts extending to the ends of the outer periphery of both sides of the battery case in the current collector, and these are heat dissipation of the C-shaped molding clamp. It may be in thermal contact with the bar or heat sink.

Here, the middle portion refers to the degree of including two electrodes vertically adjacent from the center based on the stacking direction and the thickness direction of the electrode assembly.

Alternatively, in another specific example, the electrodes positioned on the outermost sides of the electrode assembly include uncoated portions extending to the ends of the outer periphery of the battery case in the current collector, and the uncoated portions extend in different directions. It may be in thermal contact with the heatsink bar or heatsink tube of the C-molding clamp.

At this time, when the electrode assembly is embedded in the battery case, and the structure of the battery case is considered in order for the extended uncoated part to be heat-sealed together in the sealing part, the extended uncoated part is formed from an electrode located in the middle of the electrode assembly. more preferably.

As described above, in order to maximize the structure or cooling efficiency, the width of the uncoated region is 50 to 100%, specifically 80 to 100% of the length of the electrode assembly based on the electrode length direction and the protrusion direction of the electrode tab. can be When the width is less than 50%, the heat conduction area is also small, and there are few portions in contact with the heat dissipation bar or heat dissipation tube of the C-shaped molding clamp, which is not preferable because a desired degree of cooling efficiency cannot be obtained.

The C-shaped molding clamp for pressing the battery case sealing part is not limited in its material, but may be made of an insulating material to further secure insulation, and has an elastic force, so that the sealing part of the battery case inserted into the slit is elastic. can be pressurized by

As described above, since the C-shaped molding clamp has elastic force, the sealing portion can be compressed, thereby increasing the sealing strength of the battery case, which may be lowered by the interposition of the uncoated portion, thereby further improving battery safety.

The heat dissipation bar receives heat from the extended uncoated region and exerts a cooling effect by heat conduction, and may be made of a thermally conductive material, specifically, a metal.

The heat dissipation tube exerts a cooling effect by water cooling or air cooling of the heat transferred to the extended uncoated region by the refrigerant flowing therein, and the material of the heat dissipation tube is not limited, but for a better cooling effect, thermoelectric It may be made of a ceramic material.

On the other hand, the electrode assembly mounted inside the battery case is not particularly limited as long as it has a structure consisting of a positive electrode and a negative electrode and a separator interposed therebetween by connecting a plurality of electrode tabs, preferably a winding type (jelly-roll). ), a stacked or stacked/folded structure. Detailed information on the electrode assembly having a stack/folding structure is disclosed in Korean Patent Application Publication Nos. 2001-0082058, 2001-0082059, and 2001-0082060 of the present applicant, and the application is in the context of the present invention. incorporated by reference.

In the case of the jelly-roll, specifically, one of the uncoated parts of the positive and negative electrodes extending from the winding end is one side, and the other is a jelly-roll extending to the other side around half the width of the jelly-roll. .

The present invention also provides a battery module including two or more of the battery cells.

The battery module composed of the battery cells may further include a heat exchange member, in this case, the heat radiation bar or heat radiation tube inside the C-shaped molding clamp of the battery cell is to be thermally connected to the heat exchange member. can

Here, the structure of the heat exchange member is not particularly limited, and specifically, it may be a simple air cooling type, but may have a structure in which one or two or more flow paths for the flow of the refrigerant are formed. For example, by forming a refrigerant flow path for the flow of a liquid refrigerant such as water in the heat exchange member, it is possible to exhibit an excellent cooling effect with high reliability compared to a conventional air-cooling structure. In this case, the flow path may be connected to the heat dissipation tube inside the C-shaped molding clamp.

In addition, the present invention provides a battery pack manufactured by combining one or more battery modules according to a desired output and capacity, and a device including the battery pack.

The device according to the present invention includes a plurality of battery packs in order to achieve high output and high capacity, so that electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, or electric power that are seriously emerging in terms of safety of high heat generated during charging and discharging It can be preferably used for power sources such as storage devices.

In particular, in the case of electric vehicles and plug-in hybrid electric vehicles that require high output through the battery pack over a long period of time, high heat dissipation characteristics are required. It can be used more preferably in a hybrid electric vehicle.

Since the structure and manufacturing method of the battery module, battery pack, and device described above are known in the art using battery cells, detailed description thereof will be omitted herein.

As described above, the battery cell according to the present invention is a battery in which the uncoated portion of at least one electrode constituting the electrode assembly is extended to the end of the outer periphery of the battery case and fused together, and the extended uncoated portion is interposed therebetween. By coupling the sealing part around the outer periphery of the case to the C-shaped molding clamp having a structure that can remove the heat transferred from the extended plain fabric by heat conduction, the heat generated inside the battery cell can be effectively discharged to the outside, and thus the battery In addition to improving the lifespan characteristics of the battery, since the sealing strength can be improved by the C-shaped molding clamp, battery safety can be further improved.

1 is a cross-sectional view of a battery cell according to an embodiment of the present invention;
2 is a plan view of a battery cell according to an embodiment of the present invention;
3 is a cross-sectional view of a battery cell according to another embodiment of the present invention;
4 is a front view in which a plurality of battery cells are arranged for a battery module according to an embodiment of the present invention;
5 is a side view in which a plurality of battery cells are arranged for a battery module according to an embodiment of the present invention.

Hereinafter, the present invention will be further described in detail with reference to the drawings according to embodiments of the present invention, but the scope of the present invention is not limited thereto.

1 is a cross-sectional view schematically showing the inside of a battery cell according to an embodiment of the present invention, FIG. 2 is a plan view of the battery cell is shown in a perspective view.

1 and 2, in the battery cell 100, the electrode assembly 110 of the positive electrode 111 / separator 112 / negative electrode 213 structure is mounted inside the battery case 120 of a laminate sheet, and , the electrodes 113 and 114 of different polarities positioned in the middle of the electrode assembly 110 among the electrodes constituting the electrode assembly 110 are one side and the other side on which the electrode tab 115 is not formed, that is, It has a structure including uncoated parts 131 and 132 extending to the ends of the outer periphery of the battery case 120 in different directions.

At this time, the extended uncoated regions 131 and 132 are heat-sealed together at the outer periphery of the battery case 120 with one end thereof exposed to the outside, and each of the extended uncoated regions 131 and 132 is Insulating tapes 133 and 134 are attached to both surfaces to ensure insulation against such thermal fusion, like the insulating tape 116 attached to secure the insulation of the electrode tab 115 .

In addition, the sealing parts around the outer periphery of the battery case 120 heat-sealed with the extended uncoated parts 131 and 132 interposed therebetween are inserted into the slits of the C-shaped molding clamps 141 and 143, respectively. It is coupled to the clamps 141 and 143, and heat dissipation tubes 142 and 144 capable of heat conduction are inserted into the C-shaped molding clamps 141 and 143, respectively, so that the extended uncoated regions 131 and 132 are inserted. in thermal contact with

Here, the heat dissipation tubes 142 and 144 cool the heat transferred to the extended uncoated parts 131 and 132 by water cooling or air cooling by the refrigerant flowing therein.

Accordingly, the battery cell 100 according to the present invention is a heat dissipation tube capable of water cooling or air cooling by contacting the extended uncoated parts 131 and 132 and the uncoated parts 131 and 132 that are coupled to the sealing part and extend therein. (142, 144) is inserted by the C-shaped molding clamps (141, 143) having a cooling effect, to provide a means for improving the cooling rate from the outside, heat generation according to charging and discharging and of the needle-shaped conductor When an internal short circuit occurs due to penetration, the cooling rate is increased to prevent ignition, and furthermore, the sealing part is compressed by the C-shaped molding clamps (141, 143), and the bar is lowered by the intervening of the extended uncoated parts (131, 132). It is possible to exert the effect of further improving battery safety by increasing the sealing strength of the battery case 120 .

Although illustrated as a heat dissipation tube in the drawings, it is of course also possible to form a heat dissipation bar.

3 is a cross-sectional view of the battery cell 200 to show another example of the structure of the battery cell 200 according to the present invention.

Referring to FIG. 3 , in the battery cell 200 , the electrode assembly 210 of the positive electrode 211 / separator 212 / negative electrode 213 structure is mounted inside the battery case 220 of a laminate sheet, and the electrode assembly Among the electrodes constituting the 210 , the electrodes 214 and 215 of different polarities positioned at the outermost sides of the electrode assembly 210 are one side and the other side on which an electrode tab (not shown) is not formed, that is, each other. In another direction, the battery case 220 has a structure including uncoated parts 231 and 232 extending to the outer periphery of the battery case 220 .

At this time, the extended uncoated regions 231 and 232 are heat-sealed together at the outer periphery of the battery case 220 with one end thereof exposed to the outside, and each of the extended uncoated regions 231 and 232 is Insulative tapes 233 and 234 are attached to both surfaces to ensure insulation against thermal fusion.

That is, there is a difference in the formation positions of the extended uncoated regions 231 and 232 compared to the battery cell 100 of FIG. 1 .

On the other hand, in the case of manufacturing a battery module by arranging a plurality of battery cells having a structure according to the present invention, in such a battery module, the battery cells 100 and 101 to show a better cooling effect by including the C-shaped molding clamps. , 102 and 103) are shown in FIGS. 4 and 5 of the battery module having a structure in which it is arranged. Specifically, in order to make the structure more clear, FIG. 4 schematically shows a front view, and FIG. 5 schematically shows a side view.

4 and 5 together, four battery cells 100 , 101 , 102 , 103 are arranged side by side, and as described in FIG. 2 , the plain fabric extending to the end of the outer periphery of the battery case 120 . The parts 131 and 132 are heat-sealed together on the outer periphery of the battery case 120 with one end of the one exposed to the outside, and the extended uncoated parts 131 and 132 are interposed therebetween. The sealing part of the outer periphery of the battery case 120 is coupled to the C-shaped molding clamps 141 and 143, respectively, and heat dissipation tubes 142 and 144 capable of heat conduction are provided inside the C-shaped molding clamps 141 and 143. They are respectively inserted and are in thermal contact with the extended uncoated regions 131 and 132 .

Further, at the lower ends of the battery cells 100, 101, 102, and 103 in the arrangement direction, C-shaped molding clamps 141 and 143 are formed at both ends of the battery case 120, respectively. Since 150 and 160 are formed, they are in thermal contact with the heat dissipation tubes 141 and 143 inserted into the C-shaped molding clamps 141 and 143 . Further, flow passages 151 and 161 for the flow of a refrigerant such as air or water are formed inside these heat exchange members 150 and 160, and these flow passages 151 and 161 are further formed in FIG. As can be seen, the C-shaped molding clamps 141 and 143 communicate with the heat dissipation tubes 141 and 143 inserted inside, and the interaction with the heat exchange members 150 and 160 through the refrigerant (as indicated by the red arrow) Since heat exchange can be quickly achieved by the display), excellent cooling effect can be exhibited with high reliability compared to a structure in which a conventional plate-shaped heat dissipation member is brought into contact with the heat exchange member.

Hereinafter, the present invention will be described in more detail through examples, but the following examples are for illustrating the present invention, and the scope of the present invention is not limited thereto.

<Example 1>

Preparation of anode

_{LiNi 0.6} Co _0.2 Mn _0.2 O ₂ was used as a cathode active material _{, LiNi 0.6} Co _0.2 Mn _0.2 O ₂ 96.25 wt%, Fx35 (conductive agent) 1.5 wt%, PVdF (binder) 2.25 wt% NMP (N) as a solvent -methyl-2-pyrrolidone) to prepare a positive electrode mixture slurry, and then coating, drying and pressing on aluminum foil to prepare a positive electrode.

Preparation of the cathode

As the negative electrode active material, artificial graphite and natural graphite were mixed and used, and the negative electrode active material 95.6% by weight, Super-C (conductive agent) 1.0% by weight, SBR (binder) 2.3% by weight and CMC (thickener) 1.1% by weight as a solvent It was added to phosphorus water to prepare a negative electrode mixture slurry, and then coated, dried and compressed on copper foil to prepare an anode.

Manufacturing of secondary batteries

As shown in FIG. 2, the uncoated parts of the current collector of the positive electrode and the negative electrode positioned in the middle part of the electrode assembly having a structure with a PE separator interposed between the positive electrode and the negative electrode in opposite directions to be sealed together with the outer periphery of the battery case After extension, an electrolyte containing an additive including VC and a salt of 0.7M LiPF6 + 0.3M LiFSI was injected into a solvent having EC: EMC = 3: 7, and the battery case was sealed with the extended uncoated regions, and then, Al The secondary battery was completed by holding the sealing parts on both sides with a C-shaped molding clamp made of plastic into which a tubular heat dissipation tube of the material was inserted.

<Comparative Example 1>

A secondary battery was manufactured in the same manner as in Example 1, except that in Example 1, the uncoated part of the current collector was not extended and a C-type molding clamp was not used, and thus the secondary battery was prepared as in the prior art.

<Comparative Example 2>

A secondary battery was manufactured in the same manner as in Example 1, except that the uncoated part of the current collector was extended and exposed to the outside in Example 1, and a C-type molding clamp was not used.

<Experimental Example 1>

Ten secondary batteries prepared in Example 1 and Comparative Examples 1 and 2, respectively, were prepared in a fully charged state of 4.25V. Using a nail penetrating tester, a nail with a diameter of 3 mm made of iron was passed through the center of the battery made above, and the ignition was measured.

At this time, the penetration speed of the nail was constant at 25 mm/sec, and the results are summarized in Table 1 below.

ignition or not Maximum temperature (℃) Example 1 no ignition 50.2 Comparative Example 1 utterance - Comparative Example 2 no ignition 81.5

As shown in Table 1, in the secondary batteries according to the present invention, ignition does not occur in all ten batteries and the temperature rise is not large, whereas Comparative Example 1 does not have a cooling effect, so ignition occurs, and Comparative Example 2 is partially cooled Although ignition did not occur due to the effect, it can be seen that the temperature rise is large.

Those of ordinary skill in the art to which the present invention pertains will be able to perform various applications and modifications within the scope of the present invention based on the above contents.

Claims (14)

an electrode assembly having a positive electrode/separator/negative electrode structure, and a battery case made of a laminate sheet to which an outer periphery is heat-sealed while the electrode assembly is mounted in a receiving unit;
at least one electrode constituting the electrode assembly has an uncoated portion extending to an end of the outer periphery of the battery case in at least one direction among directions in which the electrode tab is not formed is formed on the current collector;
The extended uncoated part is heat-sealed together on the outer periphery of the battery case;
The sealing portion around the outer periphery of the battery case heat-sealed with the extended uncoated portion interposed therebetween is coupled to a C-shaped molding clamp having a structure capable of removing heat transferred from the extended uncoated portion by thermal conduction,
The C-shaped molding clamp has a structure in which a heat dissipation bar capable of heat conduction or a heat dissipation tube capable of water cooling or air cooling is inserted therein, and a slit for insertion of the sealing part is formed on one surface,
The heat dissipation bar is made of a thermally conductive material, and the battery cell, characterized in that the heat transferred to the extended uncoated region is cooled by thermal conduction. The battery cell according to claim 1, wherein the extended uncoated part is heat-sealed together around the outer periphery of the battery case with one end of the extended uncoated part exposed to the outside. delete The battery according to claim 1, wherein the sealing part is inserted into the slit of the C-shaped molding clamp and coupled thereto, and the extended uncoated part is in thermal contact with a heat dissipation bar or a heat dissipation tube inside the C-shaped molding clamp. cell. The method of claim 1,
two or more electrodes among the electrodes constituting the electrode assembly include an extended uncoated region in the current collector;
Among the extended uncoated areas, uncoated areas of the same polarity extend in the same direction, and uncoated areas of different polarity extend in opposite directions. According to claim 1, wherein one or more electrodes positioned in the middle of the electrode assembly among the electrodes constituting the electrode assembly, the current collector includes uncoated portions extending to the ends of both sides of the outer periphery of the battery case. battery cell with The method according to claim 1, wherein the electrodes positioned at the outermost sides of the electrode assembly include uncoated portions extending to the ends of the outer periphery of the battery case in the current collector, and the uncoated portions extend in different directions. Battery cell characterized in that. The battery cell according to claim 1, wherein the C-shaped molding clamp is made of an insulating material. The battery cell according to claim 1, wherein the C-shaped molding clamp presses the sealing part of the battery case inserted into the slit by an elastic force. delete The battery cell according to claim 1, wherein the heat dissipation tube cools the heat transferred to the extended uncoated region by water cooling or air cooling by a refrigerant flowing therein. The battery cell according to claim 1, wherein an insulating tape is attached to one or both surfaces of the extended uncoated portion meeting the heat-sealed portion of the battery case. A battery module comprising two or more battery cells according to any one of claims 1, 2, 4 to 9, 11 and 12. The battery module according to claim 13, wherein the battery module includes a heat exchange member, and a heat radiation bar or a heat radiation tube inside the C-shaped molding clamp of the battery cell is thermally connected to the heat exchange member.

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