KR20220018743A - Battery Cell With Edge Cover - Google Patents

Abstract

The present invention relates to a battery cell with an edge cover and a manufacturing method thereof, and specifically, to a battery cell with an edge cover and a manufacturing method thereof, wherein the battery cell with an edge cover includes: a battery case (110) for accommodating an electrode assembly; and a pair of electrode leads (120) having one side connected to the electrode assembly and the other side protruding from the outside of the battery case (110), and the edge cover (200) of a metal material is provided along the edge of the battery case (110).

Description

Battery Cell With Edge Cover

The present invention relates to a battery cell provided with an edge cover, and specifically, to induce the release of venting gas from a battery case sealing part having a laminate sheet structure of an inner layer/metal layer/outer layer and maintain the external shape of the battery cell. It relates to a battery cell provided with a metal edge cover.

Recently, there is an increasing demand for secondary batteries that can store electric energy produced due to the development of alternative energy due to air pollution and energy depletion caused by the use of fossil fuels. Secondary batteries that can be charged and discharged are closely used in daily life, such as being used in mobile devices, electric vehicles, hybrid electric vehicles, and the like.

Rechargeable batteries, which are used as energy sources for various electronic devices that are indispensable in modern society, are increasing in capacity due to the increase in usage and complexity of mobile devices, and the development of electric vehicles. A plurality of battery cells are disposed in a small device to satisfy a user's demand, but a battery module electrically connecting a plurality of battery cells or a battery pack having a plurality of such battery modules is used in automobiles and the like.

On the other hand, secondary batteries have excellent electrical characteristics, but in abnormal operating conditions such as overcharge, overdischarge, high temperature exposure, and electrical short circuit, decomposition reactions of active materials and electrolytes, which are the components of the battery, are induced, and heat and gas are generated. There is a problem in that the battery expands, a so-called swelling phenomenon occurs. The swelling phenomenon accelerates this decomposition reaction, which may cause explosion and ignition of the secondary battery due to a thermal runaway phenomenon.

1 is a perspective view showing a battery cell according to the prior art. As shown in FIG. 1 , the battery cell according to the prior art has a plastic battery case 10 accommodating an electrode assembly (not shown), one side of which is connected to the electrode assembly and protrudes into the battery case 10 . The lead 20 is included, the edge of the battery case 10 is formed with an extension 11 having a predetermined width, and a venting gas that may be generated inside the battery case 10 is formed on the side of the extension 11 . A discharge unit 12 capable of discharging the back to the outside is provided.

According to the battery cell according to the prior art, there is an advantage that the venting gas generated inside the battery cell is discharged through the discharge unit 12, thereby reducing the effect on adjacent battery cells due to volume expansion of the battery cell, etc. , it is difficult to form the discharge part 12 to be easily broken compared to other regions.

In addition, when a plurality of battery cells are stacked side by side, auxiliary devices such as cartridges are required to maintain the shape of the battery cells, which leads to an increase in manufacturing cost and an increase in volume.

Japanese Laid-Open Patent Publication No. 2006-236605

In order to solve the above problems, an object of the present invention is to provide a battery cell provided with an edge cover capable of emitting a venting gas in a desired position and direction.

Another object of the present invention is to provide a battery cell having an edge cover so that the battery cell itself can maintain its shape.

In the battery cell provided with an edge cover according to the present invention for achieving the above object, the battery case 110 for accommodating the electrode assembly and one side are connected to the electrode assembly, and the other side is exposed to the outside of the battery case 110 . A pair of protruding electrode leads 120 are included, and an edge cover 200 made of a metal material or a plastic material is provided along the edge of the battery case 110 .

In addition, in the battery cell according to the present invention, the edge cover 200 includes a front edge cover 210 surrounding the front edge of the battery case 110 , a side edge cover 220 surrounding the side edge of the battery case 110 , and a rear edge cover 230 surrounding the rear edge of the battery case 110 .

Also, in the battery cell according to the present invention, a through hole 212 is formed in the front edge cover 210 and/or the rear edge cover 230 to allow the electrode lead 120 to pass therethrough.

Also, in the battery cell according to the present invention, one or more slits 213 for discharging the venting gas to the outside are formed in the front edge cover 210 and/or the rear edge cover 230 .

Also, in the battery cell according to the present invention, one or more notches 214 are formed in the front edge cover 210 and/or the rear edge cover 230 .

In addition, in the battery cell according to the present invention, the front edge cover 210 and/or the rear edge cover 230 is provided with one or more slits 213 and one or more notches 214 for discharging the venting gas to the outside. It is characterized by being

In addition, in the battery cell according to the present invention, the pair of side edge cover 220 and the rear edge cover 230 are connected to each other as an integral type.

Also, in the battery cell according to the present invention, the front edge cover 210 , the side edge cover 220 , and the rear edge cover 230 have a shape that surrounds the sealed extension part 111 in the thickness direction.

Also, in the battery cell according to the present invention, a cutout 215 is formed in the front edge cover 210 and/or the rear edge cover 230 to expose the electrode lead 120 .

Another object of the present invention is to provide a battery module including the aforementioned battery cell 100 .

Another object of the present invention is to provide a battery pack including the aforementioned battery module.

As described above, according to the battery cell provided with the edge cover according to the present invention, the edge cover is provided with a slit or a cutout for venting gas emission, so that when the venting gas is generated inside the battery cell, the venting gas is directed to a desired position and direction. There is an advantage that can induce the release of.

In addition, according to the battery cell provided with the edge cover according to the present invention, the edge cover is additionally provided with a notch that is broken at a predetermined pressure or more, so that the venting gas can be rapidly discharged.

In addition, according to the battery cell provided with the edge cover according to the present invention, the shape of the battery cell can be maintained by itself due to the edge cover made of a metal material or a plastic material having a predetermined thickness along the edge of the battery cell, and thus the cartridge, etc. There is an advantage that an additional configuration for shape maintenance can be minimized.

1 is a perspective view showing a battery cell according to the prior art.
2 is a perspective view of a battery cell combined with an edge cover according to a first preferred embodiment of the present invention.
3 is a perspective view of the battery cell before the edge cover is coupled.
4 is an exploded perspective view of an edge cover according to the first embodiment.
5 is a perspective view of a battery cell combined with an edge cover according to a second preferred embodiment of the present invention.
6 is a perspective view of a battery cell combined with an edge cover according to a third preferred embodiment of the present invention.
7 is a perspective view of a battery cell combined with an edge cover according to a fourth preferred embodiment of the present invention.
8 is an exploded perspective view of an edge cover according to a fourth embodiment.
9 is a perspective view of a battery cell combined with an edge cover according to a fifth embodiment of the present invention.
10 is a perspective view illustrating a state in which the edge cover according to the fifth embodiment is in close contact with one edge of the battery case.
11 is a perspective view of a battery cell combined with an edge cover according to a sixth preferred embodiment of the present invention.
12 is a perspective view of the edge cover according to the sixth embodiment in close contact with one side edge of the battery case, as viewed from one side of the battery case.
13 is a perspective view of the edge cover according to the sixth embodiment in close contact along one edge of the battery case, as viewed from the other side of the battery case.
14 is a perspective view of a battery cell combined with an edge cover according to a seventh preferred embodiment of the present invention.
15 is a perspective view of the edge cover according to the seventh embodiment in close contact along one edge of the battery case, viewed from one side and the other side of the battery case.
16 is a perspective view illustrating a state in which a plurality of battery cells are seated in a heat dissipation unit according to a seventh exemplary embodiment.

Hereinafter, embodiments in which those of ordinary skill in the art to which the present invention pertains can easily practice the present invention will be described in detail with reference to the accompanying drawings. However, when it is determined that a detailed description of a related well-known function or configuration may unnecessarily obscure the gist of the present invention in describing the operating principle of the preferred embodiment of the present invention in detail, the detailed description thereof will be omitted.

In addition, the same reference numerals are used throughout the drawings for parts having similar functions and functions. Throughout the specification, when it is said that a part is connected to another part, it includes not only a case in which it is directly connected, but also a case in which it is indirectly connected with another element interposed therebetween. In addition, the inclusion of a certain component does not exclude other components unless otherwise stated, but means that other components may be further included.

Hereinafter, a battery cell to which an edge cover is coupled according to the present invention will be described with reference to the accompanying drawings.

2 is a perspective view of a battery cell coupled to an edge cover according to a first preferred embodiment of the present invention, FIG. 3 is a perspective view of the battery cell before the edge cover is coupled, and FIG. 4 is an exploded view of the edge cover according to the first embodiment. is a perspective view.

2 to 4, in the first embodiment of the present invention, the pocket portion for accommodating the electrode assembly is formed only on one side, and a total of four sealing portions are formed, such as the front side, the rear side, and a pair of side surfaces. Cell 100, and an edge cover 200 surrounding these sealing parts.

First, the battery cell 100 is configured to include a battery case 110 accommodating an electrode assembly (not shown) and a pair of electrode leads 120 .

Here, the electrode assembly is a jelly-roll type assembly having a structure in which a separator is interposed between a long sheet-shaped positive electrode and a negative electrode and then wound up, or a stacked assembly having a structure in which a rectangular positive electrode and a negative electrode are stacked with a separator interposed therebetween. , a stack-folding assembly in which unit cells are wound by a long separation film, or a lamination-stacking assembly in which battery cells are stacked with a separator interposed therebetween and attached to each other, but is not limited thereto.

In addition, it is natural that there is no problem even if the electrolyte is replaced with a solid electrolyte or a semi-solid electrolyte in the form of a gel having an intermediate form between liquid and solid by adding an additive to the solid electrolyte in addition to the generally used liquid electrolyte.

The electrode assembly as described above is accommodated in the battery case 110 , and the battery case 110 typically has a laminate sheet structure of an inner layer/metal layer/outer layer. Since the inner layer is in direct contact with the electrode assembly, it must have insulation and electrolyte resistance, and for sealing with the outside, the sealing property, that is, the sealing portion where the inner layers are thermally bonded to each other must have excellent thermal bonding strength.

The material of the inner layer may be selected from polyolefin resins such as polypropylene, polyethylene, polyethylene acrylic acid, polybutylene, etc., polyurethane resins and polyimide resins having excellent chemical resistance and good sealing properties, but is not limited thereto, Polypropylene excellent in mechanical properties such as tensile strength, rigidity, surface hardness, and impact resistance and chemical resistance is the most preferable.

The metal layer in contact with the inner layer corresponds to a barrier layer that prevents moisture or various gases from penetrating into the battery from the outside.

And an outer layer is provided on the other side of the metal layer, and this outer layer can be made of a heat-resistant polymer with excellent tensile strength, moisture permeability and air permeability prevention so as to secure heat resistance and chemical resistance while protecting the electrode assembly. As an example, nylon or polyethylene terephthalate may be used, but is not limited thereto.

On the other hand, the pair of electrode leads 120 is composed of a positive electrode lead and a negative electrode lead, and after the positive tab and the negative tab of the cell assembly are electrically connected, respectively, exposed to the outside of the battery case 110, or the tab is omitted and the cell assembly It is free even if it is directly connected with

Next, the edge cover 200 coupled to the edge of the battery case 110 in a shape surrounding the sealed extension 111 in the thickness direction is the front edge cover located in the direction in which the electrode lead 120 protrudes. 210 , a pair of side edge covers 220 , and a rear edge cover 230 positioned to face the front edge cover 210 .

The pair of side edge cover 220 and the rear edge cover 230 are integrally formed, and a predetermined portion may be bent to form the side edge cover 220 and the rear edge cover 230, and for convenience, the pair of The side edge cover 220 and the rear edge cover 230 will be separately described.

First, if the front edge cover 210 is described in detail, the front edge cover 210 is along the width direction (Z axis) so that the electrode lead 120 can wrap the front edge of the protruding battery case 100 . A pair of first bent portions 211 are formed so as to extend and surround the sealed extension portion 111 in the thickness direction.

In addition, a pair of through-holes 212 are formed so that the electrode leads 120 can be exposed to the outside, and one or more slits 213 are provided near the through-holes 212 .

When swelling occurs in the battery cell 100 due to various causes such as overload, an increase in internal pressure and volume expansion of the battery cell 100 may be suppressed by inducing a venting gas to the slit 213 . In addition, since the venting gas is induced only to the place where the slit 213 is located, if a temperature sensor or a pressure sensor is placed near the slit 213, it is possible to quickly and easily determine whether the venting gas is leaking.

These edge covers are preferably made of a metal material or a plastic material of an insulating material having a predetermined thickness. There is an advantage to be

Here, when the edge cover is made of a metal material, it is preferable that an insulating film is additionally provided on the inside and outside of the edge cover.

Although the shape of the slit 213 is shown as a rectangle in the present invention, the present invention is not limited thereto as long as the venting gas generated therein can be discharged to the outside.

A pair of side edge covers 220 extend along the longitudinal direction (X-axis) so as to wrap both side edges of the battery case 110, and have a shape surrounding the sealed extension 111 in the thickness direction. A pair of second bent portions 221 are formed.

And the rear edge cover 230 is extended along the width direction (Z-axis) to wrap the rear edge of the battery case 110, and the third bent so as to wrap the sealed extension 111 in the thickness direction. A portion 231 is formed.

Here, it is preferable that no slits are provided in the pair of side edge covers 220 and the rear edge covers 230 to guide all the venting gas to the slits 213 of the front edge cover 210 .

Of course, in FIGS. 2 to 4, the slit 213 is provided on the front edge cover 210 and the slit is not formed on the other pair of side edge covers 220 and the rear edge cover 230, but the rear edge cover It is also possible to form a slit only at 230 or form a slit only on a pair of side edge covers or one side edge cover.

Briefly described with respect to the manufacturing method of the battery cell combined with the metal edge cover in the first preferred embodiment of the present invention having the configuration as described above, the battery cell 100 provided with a pair of electrode leads 120 It is configured to include the steps of preparing the , preparing the edge cover 200 made of a metal material, and combining the edge cover 200 along the edge of the battery case 110 .

Specifically, the step of preparing the battery cell 100 so that the pair of electrode leads 120 protrude to the outside and the sealed extension 111 is formed is a battery having a laminate sheet structure of an inner layer/metal layer/outer layer. It is manufactured through a step of sealing the edge after housing the electrode assembly in which the pair of electrode leads 120 are connected to the case 110, and since this battery cell manufacturing technology corresponds to a known technology, a detailed description thereof will be omitted. do.

The step of preparing the edge cover 200 is a metal front edge cover 210 having an insulating film attached to both sides or an insulating material is coated or applied, a pair of side edge covers 220 made of a metal, and a metal This is a step of preparing the rear edge cover 230 of the material.

Here, the front edge cover 210 is bent to a predetermined shape so as to wrap the sealed extension part 111 in the thickness direction, and a through hole 212 through which a pair of electrode leads 120 pass and a venting gas. A slit 213 is provided above to guide the emission. In addition, a pair of side edge covers 220 and rear edge covers 230 are also integrally bent so as to wrap the sealed extensions 111 .

In the step of combining the edge cover 200 along the edge of the battery case 110 , the front edge cover 210 , a pair of side edge covers 220 , and the rear edge cover 230 include the battery case 110 . It is a step of coupling to surround the extension 111 located on the edge of the.

A pair of integrally formed side edge covers 220 and rear edge covers 230 are inserted so as to wrap both sides and rear extensions 111 of the battery case 110, while the front edge cover 210 of After passing the electrode lead 120 through the through hole 212 , the front edge cover 210 is coupled to the front surface of the battery case 110 . Of course, so that the electrode lead 120 and the front edge cover 210 made of a metal material can more reliably block electricity from each other, the electrode lead 120 and the edge of the through hole 212 are kept a predetermined distance apart or penetrated. A known insulating material may be additionally filled in a predetermined portion of the electrode lead 120 passing through the hole 212 .

Then, it is preferable to press the edge cover using a pressing jig (not shown) so that the front, side and rear edge covers can be securely fixedly attached to the upper and lower surfaces of the extension part 111, and the front edge cover ( 210) and the pair of side edge covers 220 overlap or closely contact each other is more preferably fixed to each other through a known metal bonding means such as welding.

Meanwhile, in the case of an edge cover made of an insulating plastic material, an insulating adhesive may be used to fix the battery case 110 to the extension part 111 .

5 is a perspective view of a battery cell combined with an edge cover according to a second preferred embodiment of the present invention.

5, in the second embodiment according to the present invention, instead of one or more slits 213 having a long rectangular shape in the width direction (Z-axis direction) in the front edge cover 210 in the thickness direction (Y-axis) direction), since it is the same as the first embodiment described with reference to FIGS. 2 to 4 except that the notch 214 is formed, the description of the same configuration will be omitted and only different configurations will be described.

In the second embodiment according to the present invention, one or more notches 214 are formed in the vicinity of the through hole 212 of the front edge cover 210 . Therefore, when swelling occurs in the battery cell 100 due to various causes such as overload, the relatively weak notch 214 is first broken, and the venting gas is discharged from the vicinity of the notch 214 .

Here, the notch 214 is illustrated as provided in the front edge cover 210, but similarly to the first embodiment, a notch is formed only on the rear edge cover 230, or a pair of side edge covers or one side It is also possible to form a notch only on the edge cover.

In the manufacturing method of the battery cell combined with the edge cover according to the second preferred embodiment of the present invention having the configuration as described above, the notch 214 instead of the slit 213 is provided in the front edge cover 210 except that Since and is the same as the manufacturing method according to the first embodiment, the overlapping description will be omitted.

6 is a perspective view of a battery cell combined with an edge cover according to a third preferred embodiment of the present invention.

6, the third embodiment according to the present invention has a long rectangular slit 213 in the width direction (Z-axis direction) in the front edge cover 210 and a notch in the thickness direction (Y-axis direction) ( 214) is formed, and since it is the same as the first embodiment described with reference to FIGS. 2 to 4, description of the same configuration will be omitted and only different configurations will be described.

The front edge cover 210 according to the third embodiment of the present invention is provided with one or more slits 213 and a notch 214 that is broken when a predetermined pressure or more is reached. Therefore, the venting gas is released through the slit 213 until the pressure at which the notch 214 is broken is reached, so that the shape of the battery cell 100 and the edge cover 200 can be maintained, and when a large amount of venting gas is generated, The notch 214 is broken to allow for the rapid release of the venting gas.

Although the drawing shows that the slit 213 and the notch 214 are formed to overlap in a cross (+) shape, this is only an example and it is also possible that the slit 213 and the notch 214 are formed separately. .

In the manufacturing method of the battery cell combined with the edge cover according to the third preferred embodiment of the present invention having the above configuration, the slit 213 and the notch 214 are provided on the front edge cover 210 at the same time, except that Since and is the same as the manufacturing method according to the first embodiment, the overlapping description will be omitted.

7 is a perspective view of a battery cell combined with an edge cover according to a fourth exemplary embodiment of the present invention, and FIG. 8 is an exploded perspective view of the edge cover according to the fourth exemplary embodiment.

7 and 8, the fourth embodiment according to the present invention is an edge cover mounted on the bidirectional battery cell 100 in which a pair of electrode leads 120 are positioned to face each other, and the electrode leads ( 2 to 4, except that the through-hole 212 for passing 120 and the slit 213 for discharging the venting gas are simultaneously located on the front edge cover 210 and the rear edge cover 230. Since it is the same as the described first embodiment, description of the same configuration will be omitted and only different configurations will be described.

One through hole 212 and one or more slits 213 for discharging the venting gas are respectively formed in the front edge cover 210 and the rear edge cover 230 according to the fourth embodiment of the present invention.

Although the drawings show that the slits 213 are formed on both the front edge cover 210 and the rear edge cover 230 , it is also possible to form the slits 213 only on one edge cover.

In the manufacturing method of the battery cell combined with the edge cover according to the fourth preferred embodiment of the present invention having the configuration as described above, a through hole 212 and a slit ( 213) is the same as the manufacturing method according to the first embodiment except for being provided at the same time, and thus the overlapping description will be omitted.

9 is a perspective view of a battery cell coupled to an edge cover according to a fifth embodiment of the present invention, and FIG. 10 is a perspective view showing a state in which the edge cover according to the fifth embodiment is in close contact with one edge of the battery case. .

9 and 10, the edge cover 200 according to the fifth embodiment of the present invention includes a front edge cover 210, a pair of side edge covers 220 and a rear edge cover 230. It is made integrally, and in addition, the front edge cover 210 is provided with a pair of cutouts 215 so that the pair of electrode leads 120 together with the slit 213 for exhausting the venting gas can be exposed to the outside. It is the same as that of the first embodiment except that there is.

Briefly describing the manufacturing method of the battery cell combined with the edge cover according to the fifth embodiment of the present invention having the configuration as described above, first, the battery cell 100 provided with a pair of electrode leads 120 is prepared. and in relation to this, since it is the same as described above, a detailed description thereof will be omitted.

In the step of preparing the edge cover 200, a metal plate having a hole in the middle and having a slit 213 and a cutout 215 formed on one edge, that is, an edge corresponding to the front edge cover 210 is prepared.

Thereafter, the step of forming the edge cover 200 on the edge of the battery case 110 is performed. Specifically, after placing the battery case 110 on the flat-shaped edge cover 200, the edge cover 200 is bent so as to surround the sealed extension of the battery case 110 in the thickness direction.

Here, at the time of bending, a separately provided jig or forming mold can be used, and the front edge cover 210, a pair of side edge covers 220 and the rear edge cover 230 are simultaneously bent, or these edge covers are sequentially folded. It is also possible to bend with

On the other hand, in the step of forming the edge cover 200 on the edge of the battery case 110, the edge of the battery case 110 cut to a predetermined size and a predetermined portion of the edge cover 200 are overlapped with a known method such as an insulating adhesive It is safe even if it is pre-adhesive.

11 is a perspective view of a battery cell combined with an edge cover according to a sixth preferred embodiment of the present invention, and FIG. 12 is a state in which the edge cover according to the sixth embodiment is in close contact along one side edge of the battery case, A perspective view viewed from one side and FIG. 13 is a perspective view of the edge cover according to the sixth embodiment in a state in which it is in close contact with one edge of the battery case, as viewed from the other direction of the battery case.

11 to 13, the front edge cover 210 according to the sixth embodiment of the present invention has a pair of electrode leads 120 with a slit omitted so that the pair of electrode leads 120 can be exposed to the outside. Since it is the same as the fifth embodiment except that the cutout 215 is provided, the overlapping description will be omitted.

Meanwhile, in the battery cell according to the sixth embodiment, since a slit for discharging the venting gas is not provided, the venting gas is provided through a pair of cutouts 215 so that the pair of electrode leads 120 can be exposed. It is self-evident that it is discharged to the vicinity.

14 is a perspective view of a battery cell combined with an edge cover according to a seventh exemplary embodiment of the present invention, and FIG. 15 is a state in which the edge cover according to the seventh exemplary embodiment is in close contact along one edge of the battery case, the battery case is a perspective view viewed from one direction and the other direction, and FIG. 16 is a perspective view showing a state in which a plurality of battery cells according to the seventh embodiment are seated in the heat dissipation unit.

In the seventh embodiment of the present invention, pocket portions for accommodating the electrode assembly are formed on both sides, and the central portion is folded to form a total of three sealing portions such as one side, a front side, and a rear side, the battery cell 100, and It is similar to the sixth embodiment except for including the edge cover 200 surrounding these sealing parts.

However, as shown in FIG. 15 , the edge end of the edge cover 200 may be rolled up to have a predetermined radius of curvature, such as a circle or an oval, or fixed to the sealing parts in a bent state at least once, which is made of a metal material. In order to minimize damage to the sealing portion when the edge cover is coupled to the sealing portion, it is obvious that the above-described first to sixth embodiments may also be applied.

In general, a plurality of vertically erected battery cells are stacked side by side to form one battery module. As shown in FIG. 16 , a plurality of battery cells 100 are arranged sideways, and 100) One side, more specifically, the folding surface on which the edge cover is not provided, maintains a state in close contact with the heat dissipation unit 240 .

Therefore, in order to minimize the increase in the volume of the battery module, the total thickness of the sealing portion including the edge cover 200 is preferably less than or equal to the thickness of the pocket portion in which the electrode assembly is accommodated.

The present invention may be a battery module in which the battery cells having the above-described configuration are accommodated, or a battery pack in which one or more battery modules are accommodated. In addition, the battery pack may be mounted on the device. For example, the device may be an electronic device including a large-capacity battery such as an electric vehicle, a hybrid vehicle, a plug-in hybrid electric vehicle, and the like.

As the specific part of the present invention has been described in detail above, for those of ordinary skill in the art, these specific descriptions are only preferred embodiments, and the scope of the present invention is not limited thereby. It is obvious to those skilled in the art that various changes and modifications can be made within the scope and spirit of the present invention, and it is natural that such variations and modifications fall within the scope of the appended claims.

100: battery cell
110: battery case
111: extension
120: electrode lead
200: edge cover
210: front edge cover
211: first bent part
212: through hole
213: slit
214: notch
215: cutout
220: side edge cover
221: second bent part
230: rear edge cover
231: third bent part
240: heat dissipation unit

Claims (11)

a battery case accommodating the electrode assembly; and
A pair of electrode leads having one side connected to the electrode assembly and the other side protruding to the outside of the battery case; including,
A battery cell with an edge cover, characterized in that an edge cover made of a metal material or a plastic material is provided along the edge of the battery case.
According to claim 1,
The edge cover is a battery cell with an edge cover, characterized in that it comprises a front edge cover surrounding the front edge of the battery case, a side edge cover surrounding the side edge of the battery case, and a rear edge cover surrounding the rear edge of the battery case.
3. The method of claim 2,
A battery cell with an edge cover, characterized in that a through hole is formed in the front edge cover and/or the rear edge cover to allow an electrode lead to pass therethrough.
4. The method of claim 3,
A battery cell with an edge cover, characterized in that one or more slits for discharging the venting gas to the outside are formed in the front edge cover and/or the rear edge cover.
4. The method of claim 3,
A battery cell with an edge cover, characterized in that one or more notches are formed in the front edge cover and/or the rear edge cover.
4. The method of claim 3,
A battery cell with an edge cover, characterized in that the front edge cover and/or the rear edge cover is provided with one or more slits and one or more notches for discharging the venting gas to the outside.
3. The method of claim 2,
The battery cell provided with an edge cover, characterized in that the side edge cover and the rear edge cover are connected to each other as an integral type.
3. The method of claim 2,
The front edge cover, the side edge cover, and the rear edge cover are battery cells provided with an edge cover, characterized in that the shape surrounding the sealed extension in the thickness direction.
3. The method of claim 2,
A battery cell with an edge cover, characterized in that a cutout is formed in the front edge cover and/or the rear edge cover to expose the electrode leads.
A battery module comprising the battery cell according to any one of claims 1 to 9.
A battery pack comprising the battery module according to claim 10.

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